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-rw-r--r--Documentation/filesystems/automount-support.txt2
-rw-r--r--drivers/usb/core/inode.c2
-rw-r--r--fs/9p/vfs_super.c7
-rw-r--r--fs/afs/mntpt.c2
-rw-r--r--fs/afs/super.c2
-rw-r--r--fs/afs/super.h2
-rw-r--r--fs/binfmt_misc.c3
-rw-r--r--fs/cifs/cifsfs.c6
-rw-r--r--fs/configfs/mount.c2
-rw-r--r--fs/debugfs/inode.c2
-rw-r--r--fs/fuse/inode.c5
-rw-r--r--fs/libfs.c4
-rw-r--r--fs/lockd/clntlock.c39
-rw-r--r--fs/lockd/clntproc.c14
-rw-r--r--fs/lockd/host.c9
-rw-r--r--fs/namespace.c128
-rw-r--r--fs/nfs/Makefile8
-rw-r--r--fs/nfs/callback.c2
-rw-r--r--fs/nfs/callback_xdr.c2
-rw-r--r--fs/nfs/dir.c18
-rw-r--r--fs/nfs/direct.c6
-rw-r--r--fs/nfs/file.c30
-rw-r--r--fs/nfs/idmap.c1
-rw-r--r--fs/nfs/inode.c1315
-rw-r--r--fs/nfs/internal.h186
-rw-r--r--fs/nfs/namespace.c229
-rw-r--r--fs/nfs/nfs2xdr.c8
-rw-r--r--fs/nfs/nfs3acl.c11
-rw-r--r--fs/nfs/nfs3proc.c5
-rw-r--r--fs/nfs/nfs3xdr.c6
-rw-r--r--fs/nfs/nfs4_fs.h4
-rw-r--r--fs/nfs/nfs4namespace.c201
-rw-r--r--fs/nfs/nfs4proc.c111
-rw-r--r--fs/nfs/nfs4xdr.c218
-rw-r--r--fs/nfs/pagelist.c51
-rw-r--r--fs/nfs/proc.c5
-rw-r--r--fs/nfs/read.c122
-rw-r--r--fs/nfs/super.c1537
-rw-r--r--fs/nfs/symlink.c13
-rw-r--r--fs/nfs/sysctl.c10
-rw-r--r--fs/nfs/write.c49
-rw-r--r--fs/super.c2
-rw-r--r--include/linux/fs.h4
-rw-r--r--include/linux/lockd/lockd.h4
-rw-r--r--include/linux/mount.h8
-rw-r--r--include/linux/nfs4.h1
-rw-r--r--include/linux/nfs_fs.h62
-rw-r--r--include/linux/nfs_fs_sb.h1
-rw-r--r--include/linux/nfs_page.h5
-rw-r--r--include/linux/nfs_xdr.h61
-rw-r--r--include/linux/sunrpc/xdr.h1
-rw-r--r--mm/shmem.c2
-rw-r--r--net/sunrpc/auth_null.c2
-rw-r--r--net/sunrpc/auth_unix.c1
-rw-r--r--net/sunrpc/rpc_pipe.c2
-rw-r--r--net/sunrpc/xdr.c28
-rw-r--r--net/sunrpc/xprt.c4
-rw-r--r--net/sunrpc/xprtsock.c11
-rw-r--r--security/inode.c2
59 files changed, 3065 insertions, 1513 deletions
diff --git a/Documentation/filesystems/automount-support.txt b/Documentation/filesystems/automount-support.txt
index 58c65a1713e5..7cac200e2a85 100644
--- a/Documentation/filesystems/automount-support.txt
+++ b/Documentation/filesystems/automount-support.txt
@@ -19,7 +19,7 @@ following procedure:
19 19
20 (2) Have the follow_link() op do the following steps: 20 (2) Have the follow_link() op do the following steps:
21 21
22 (a) Call do_kern_mount() to call the appropriate filesystem to set up a 22 (a) Call vfs_kern_mount() to call the appropriate filesystem to set up a
23 superblock and gain a vfsmount structure representing it. 23 superblock and gain a vfsmount structure representing it.
24 24
25 (b) Copy the nameidata provided as an argument and substitute the dentry 25 (b) Copy the nameidata provided as an argument and substitute the dentry
diff --git a/drivers/usb/core/inode.c b/drivers/usb/core/inode.c
index 95f5ad923b0f..bfc9b28a7242 100644
--- a/drivers/usb/core/inode.c
+++ b/drivers/usb/core/inode.c
@@ -569,7 +569,7 @@ static int create_special_files (void)
569 ignore_mount = 1; 569 ignore_mount = 1;
570 570
571 /* create the devices special file */ 571 /* create the devices special file */
572 retval = simple_pin_fs("usbfs", &usbfs_mount, &usbfs_mount_count); 572 retval = simple_pin_fs(&usb_fs_type, &usbfs_mount, &usbfs_mount_count);
573 if (retval) { 573 if (retval) {
574 err ("Unable to get usbfs mount"); 574 err ("Unable to get usbfs mount");
575 goto exit; 575 goto exit;
diff --git a/fs/9p/vfs_super.c b/fs/9p/vfs_super.c
index 872943004e59..8b15bb22caca 100644
--- a/fs/9p/vfs_super.c
+++ b/fs/9p/vfs_super.c
@@ -256,11 +256,12 @@ static int v9fs_show_options(struct seq_file *m, struct vfsmount *mnt)
256} 256}
257 257
258static void 258static void
259v9fs_umount_begin(struct super_block *sb) 259v9fs_umount_begin(struct vfsmount *vfsmnt, int flags)
260{ 260{
261 struct v9fs_session_info *v9ses = sb->s_fs_info; 261 struct v9fs_session_info *v9ses = vfsmnt->mnt_sb->s_fs_info;
262 262
263 v9fs_session_cancel(v9ses); 263 if (flags & MNT_FORCE)
264 v9fs_session_cancel(v9ses);
264} 265}
265 266
266static struct super_operations v9fs_super_ops = { 267static struct super_operations v9fs_super_ops = {
diff --git a/fs/afs/mntpt.c b/fs/afs/mntpt.c
index b5cf9e1205ad..99785a79d043 100644
--- a/fs/afs/mntpt.c
+++ b/fs/afs/mntpt.c
@@ -203,7 +203,7 @@ static struct vfsmount *afs_mntpt_do_automount(struct dentry *mntpt)
203 203
204 /* try and do the mount */ 204 /* try and do the mount */
205 kdebug("--- attempting mount %s -o %s ---", devname, options); 205 kdebug("--- attempting mount %s -o %s ---", devname, options);
206 mnt = do_kern_mount("afs", 0, devname, options); 206 mnt = vfs_kern_mount(&afs_fs_type, 0, devname, options);
207 kdebug("--- mount result %p ---", mnt); 207 kdebug("--- mount result %p ---", mnt);
208 208
209 free_page((unsigned long) devname); 209 free_page((unsigned long) devname);
diff --git a/fs/afs/super.c b/fs/afs/super.c
index 82468df0ba54..67d1f5c819ec 100644
--- a/fs/afs/super.c
+++ b/fs/afs/super.c
@@ -48,7 +48,7 @@ static void afs_put_super(struct super_block *sb);
48 48
49static void afs_destroy_inode(struct inode *inode); 49static void afs_destroy_inode(struct inode *inode);
50 50
51static struct file_system_type afs_fs_type = { 51struct file_system_type afs_fs_type = {
52 .owner = THIS_MODULE, 52 .owner = THIS_MODULE,
53 .name = "afs", 53 .name = "afs",
54 .get_sb = afs_get_sb, 54 .get_sb = afs_get_sb,
diff --git a/fs/afs/super.h b/fs/afs/super.h
index ac11362f4e95..32de8cc6fae8 100644
--- a/fs/afs/super.h
+++ b/fs/afs/super.h
@@ -38,6 +38,8 @@ static inline struct afs_super_info *AFS_FS_S(struct super_block *sb)
38 return sb->s_fs_info; 38 return sb->s_fs_info;
39} 39}
40 40
41extern struct file_system_type afs_fs_type;
42
41#endif /* __KERNEL__ */ 43#endif /* __KERNEL__ */
42 44
43#endif /* _LINUX_AFS_SUPER_H */ 45#endif /* _LINUX_AFS_SUPER_H */
diff --git a/fs/binfmt_misc.c b/fs/binfmt_misc.c
index 07a4996cca3f..34ebbc191e46 100644
--- a/fs/binfmt_misc.c
+++ b/fs/binfmt_misc.c
@@ -55,6 +55,7 @@ typedef struct {
55} Node; 55} Node;
56 56
57static DEFINE_RWLOCK(entries_lock); 57static DEFINE_RWLOCK(entries_lock);
58static struct file_system_type bm_fs_type;
58static struct vfsmount *bm_mnt; 59static struct vfsmount *bm_mnt;
59static int entry_count; 60static int entry_count;
60 61
@@ -637,7 +638,7 @@ static ssize_t bm_register_write(struct file *file, const char __user *buffer,
637 if (!inode) 638 if (!inode)
638 goto out2; 639 goto out2;
639 640
640 err = simple_pin_fs("binfmt_misc", &bm_mnt, &entry_count); 641 err = simple_pin_fs(&bm_fs_type, &bm_mnt, &entry_count);
641 if (err) { 642 if (err) {
642 iput(inode); 643 iput(inode);
643 inode = NULL; 644 inode = NULL;
diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index 7520f4687158..8b4de6eaabd0 100644
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -403,12 +403,14 @@ static struct quotactl_ops cifs_quotactl_ops = {
403#endif 403#endif
404 404
405#ifdef CONFIG_CIFS_EXPERIMENTAL 405#ifdef CONFIG_CIFS_EXPERIMENTAL
406static void cifs_umount_begin(struct super_block * sblock) 406static void cifs_umount_begin(struct vfsmount * vfsmnt, int flags)
407{ 407{
408 struct cifs_sb_info *cifs_sb; 408 struct cifs_sb_info *cifs_sb;
409 struct cifsTconInfo * tcon; 409 struct cifsTconInfo * tcon;
410 410
411 cifs_sb = CIFS_SB(sblock); 411 if (!(flags & MNT_FORCE))
412 return;
413 cifs_sb = CIFS_SB(vfsmnt->mnt_sb);
412 if(cifs_sb == NULL) 414 if(cifs_sb == NULL)
413 return; 415 return;
414 416
diff --git a/fs/configfs/mount.c b/fs/configfs/mount.c
index 94dab7bdd851..3e5fe843e1df 100644
--- a/fs/configfs/mount.c
+++ b/fs/configfs/mount.c
@@ -118,7 +118,7 @@ static struct file_system_type configfs_fs_type = {
118 118
119int configfs_pin_fs(void) 119int configfs_pin_fs(void)
120{ 120{
121 return simple_pin_fs("configfs", &configfs_mount, 121 return simple_pin_fs(&configfs_fs_type, &configfs_mount,
122 &configfs_mnt_count); 122 &configfs_mnt_count);
123} 123}
124 124
diff --git a/fs/debugfs/inode.c b/fs/debugfs/inode.c
index 440128ebef3b..6fa1e04f8415 100644
--- a/fs/debugfs/inode.c
+++ b/fs/debugfs/inode.c
@@ -199,7 +199,7 @@ struct dentry *debugfs_create_file(const char *name, mode_t mode,
199 199
200 pr_debug("debugfs: creating file '%s'\n",name); 200 pr_debug("debugfs: creating file '%s'\n",name);
201 201
202 error = simple_pin_fs("debugfs", &debugfs_mount, &debugfs_mount_count); 202 error = simple_pin_fs(&debug_fs_type, &debugfs_mount, &debugfs_mount_count);
203 if (error) 203 if (error)
204 goto exit; 204 goto exit;
205 205
diff --git a/fs/fuse/inode.c b/fs/fuse/inode.c
index 5ceb8bd7a189..dcaaabd3b9c4 100644
--- a/fs/fuse/inode.c
+++ b/fs/fuse/inode.c
@@ -198,9 +198,10 @@ struct inode *fuse_iget(struct super_block *sb, unsigned long nodeid,
198 return inode; 198 return inode;
199} 199}
200 200
201static void fuse_umount_begin(struct super_block *sb) 201static void fuse_umount_begin(struct vfsmount *vfsmnt, int flags)
202{ 202{
203 fuse_abort_conn(get_fuse_conn_super(sb)); 203 if (flags & MNT_FORCE)
204 fuse_abort_conn(get_fuse_conn_super(vfsmnt->mnt_sb));
204} 205}
205 206
206static void fuse_put_super(struct super_block *sb) 207static void fuse_put_super(struct super_block *sb)
diff --git a/fs/libfs.c b/fs/libfs.c
index 1b1156381787..fc785d8befb9 100644
--- a/fs/libfs.c
+++ b/fs/libfs.c
@@ -424,13 +424,13 @@ out:
424 424
425static DEFINE_SPINLOCK(pin_fs_lock); 425static DEFINE_SPINLOCK(pin_fs_lock);
426 426
427int simple_pin_fs(char *name, struct vfsmount **mount, int *count) 427int simple_pin_fs(struct file_system_type *type, struct vfsmount **mount, int *count)
428{ 428{
429 struct vfsmount *mnt = NULL; 429 struct vfsmount *mnt = NULL;
430 spin_lock(&pin_fs_lock); 430 spin_lock(&pin_fs_lock);
431 if (unlikely(!*mount)) { 431 if (unlikely(!*mount)) {
432 spin_unlock(&pin_fs_lock); 432 spin_unlock(&pin_fs_lock);
433 mnt = do_kern_mount(name, 0, name, NULL); 433 mnt = vfs_kern_mount(type, 0, type->name, NULL);
434 if (IS_ERR(mnt)) 434 if (IS_ERR(mnt))
435 return PTR_ERR(mnt); 435 return PTR_ERR(mnt);
436 spin_lock(&pin_fs_lock); 436 spin_lock(&pin_fs_lock);
diff --git a/fs/lockd/clntlock.c b/fs/lockd/clntlock.c
index bce744468708..52774feab93f 100644
--- a/fs/lockd/clntlock.c
+++ b/fs/lockd/clntlock.c
@@ -147,11 +147,10 @@ u32 nlmclnt_grant(const struct sockaddr_in *addr, const struct nlm_lock *lock)
147 * Someone has sent us an SM_NOTIFY. Ensure we bind to the new port number, 147 * Someone has sent us an SM_NOTIFY. Ensure we bind to the new port number,
148 * that we mark locks for reclaiming, and that we bump the pseudo NSM state. 148 * that we mark locks for reclaiming, and that we bump the pseudo NSM state.
149 */ 149 */
150static inline 150static void nlmclnt_prepare_reclaim(struct nlm_host *host)
151void nlmclnt_prepare_reclaim(struct nlm_host *host, u32 newstate)
152{ 151{
152 down_write(&host->h_rwsem);
153 host->h_monitored = 0; 153 host->h_monitored = 0;
154 host->h_nsmstate = newstate;
155 host->h_state++; 154 host->h_state++;
156 host->h_nextrebind = 0; 155 host->h_nextrebind = 0;
157 nlm_rebind_host(host); 156 nlm_rebind_host(host);
@@ -164,6 +163,13 @@ void nlmclnt_prepare_reclaim(struct nlm_host *host, u32 newstate)
164 dprintk("NLM: reclaiming locks for host %s", host->h_name); 163 dprintk("NLM: reclaiming locks for host %s", host->h_name);
165} 164}
166 165
166static void nlmclnt_finish_reclaim(struct nlm_host *host)
167{
168 host->h_reclaiming = 0;
169 up_write(&host->h_rwsem);
170 dprintk("NLM: done reclaiming locks for host %s", host->h_name);
171}
172
167/* 173/*
168 * Reclaim all locks on server host. We do this by spawning a separate 174 * Reclaim all locks on server host. We do this by spawning a separate
169 * reclaimer thread. 175 * reclaimer thread.
@@ -171,12 +177,10 @@ void nlmclnt_prepare_reclaim(struct nlm_host *host, u32 newstate)
171void 177void
172nlmclnt_recovery(struct nlm_host *host, u32 newstate) 178nlmclnt_recovery(struct nlm_host *host, u32 newstate)
173{ 179{
174 if (host->h_reclaiming++) { 180 if (host->h_nsmstate == newstate)
175 if (host->h_nsmstate == newstate) 181 return;
176 return; 182 host->h_nsmstate = newstate;
177 nlmclnt_prepare_reclaim(host, newstate); 183 if (!host->h_reclaiming++) {
178 } else {
179 nlmclnt_prepare_reclaim(host, newstate);
180 nlm_get_host(host); 184 nlm_get_host(host);
181 __module_get(THIS_MODULE); 185 __module_get(THIS_MODULE);
182 if (kernel_thread(reclaimer, host, CLONE_KERNEL) < 0) 186 if (kernel_thread(reclaimer, host, CLONE_KERNEL) < 0)
@@ -190,6 +194,7 @@ reclaimer(void *ptr)
190 struct nlm_host *host = (struct nlm_host *) ptr; 194 struct nlm_host *host = (struct nlm_host *) ptr;
191 struct nlm_wait *block; 195 struct nlm_wait *block;
192 struct file_lock *fl, *next; 196 struct file_lock *fl, *next;
197 u32 nsmstate;
193 198
194 daemonize("%s-reclaim", host->h_name); 199 daemonize("%s-reclaim", host->h_name);
195 allow_signal(SIGKILL); 200 allow_signal(SIGKILL);
@@ -199,19 +204,25 @@ reclaimer(void *ptr)
199 lock_kernel(); 204 lock_kernel();
200 lockd_up(); 205 lockd_up();
201 206
207 nlmclnt_prepare_reclaim(host);
202 /* First, reclaim all locks that have been marked. */ 208 /* First, reclaim all locks that have been marked. */
203restart: 209restart:
210 nsmstate = host->h_nsmstate;
204 list_for_each_entry_safe(fl, next, &host->h_reclaim, fl_u.nfs_fl.list) { 211 list_for_each_entry_safe(fl, next, &host->h_reclaim, fl_u.nfs_fl.list) {
205 list_del_init(&fl->fl_u.nfs_fl.list); 212 list_del_init(&fl->fl_u.nfs_fl.list);
206 213
207 if (signalled()) 214 if (signalled())
208 continue; 215 continue;
209 if (nlmclnt_reclaim(host, fl) == 0) 216 if (nlmclnt_reclaim(host, fl) != 0)
210 list_add_tail(&fl->fl_u.nfs_fl.list, &host->h_granted); 217 continue;
211 goto restart; 218 list_add_tail(&fl->fl_u.nfs_fl.list, &host->h_granted);
219 if (host->h_nsmstate != nsmstate) {
220 /* Argh! The server rebooted again! */
221 list_splice_init(&host->h_granted, &host->h_reclaim);
222 goto restart;
223 }
212 } 224 }
213 225 nlmclnt_finish_reclaim(host);
214 host->h_reclaiming = 0;
215 226
216 /* Now, wake up all processes that sleep on a blocked lock */ 227 /* Now, wake up all processes that sleep on a blocked lock */
217 list_for_each_entry(block, &nlm_blocked, b_list) { 228 list_for_each_entry(block, &nlm_blocked, b_list) {
diff --git a/fs/lockd/clntproc.c b/fs/lockd/clntproc.c
index f96e38155b5c..4db62098d3f4 100644
--- a/fs/lockd/clntproc.c
+++ b/fs/lockd/clntproc.c
@@ -508,7 +508,10 @@ nlmclnt_lock(struct nlm_rqst *req, struct file_lock *fl)
508 } 508 }
509 509
510 block = nlmclnt_prepare_block(host, fl); 510 block = nlmclnt_prepare_block(host, fl);
511again:
511 for(;;) { 512 for(;;) {
513 /* Reboot protection */
514 fl->fl_u.nfs_fl.state = host->h_state;
512 status = nlmclnt_call(req, NLMPROC_LOCK); 515 status = nlmclnt_call(req, NLMPROC_LOCK);
513 if (status < 0) 516 if (status < 0)
514 goto out_unblock; 517 goto out_unblock;
@@ -531,10 +534,16 @@ nlmclnt_lock(struct nlm_rqst *req, struct file_lock *fl)
531 } 534 }
532 535
533 if (resp->status == NLM_LCK_GRANTED) { 536 if (resp->status == NLM_LCK_GRANTED) {
534 fl->fl_u.nfs_fl.state = host->h_state; 537 down_read(&host->h_rwsem);
538 /* Check whether or not the server has rebooted */
539 if (fl->fl_u.nfs_fl.state != host->h_state) {
540 up_read(&host->h_rwsem);
541 goto again;
542 }
535 fl->fl_flags |= FL_SLEEP; 543 fl->fl_flags |= FL_SLEEP;
536 /* Ensure the resulting lock will get added to granted list */ 544 /* Ensure the resulting lock will get added to granted list */
537 do_vfs_lock(fl); 545 do_vfs_lock(fl);
546 up_read(&host->h_rwsem);
538 } 547 }
539 status = nlm_stat_to_errno(resp->status); 548 status = nlm_stat_to_errno(resp->status);
540out_unblock: 549out_unblock:
@@ -596,6 +605,7 @@ nlmclnt_reclaim(struct nlm_host *host, struct file_lock *fl)
596static int 605static int
597nlmclnt_unlock(struct nlm_rqst *req, struct file_lock *fl) 606nlmclnt_unlock(struct nlm_rqst *req, struct file_lock *fl)
598{ 607{
608 struct nlm_host *host = req->a_host;
599 struct nlm_res *resp = &req->a_res; 609 struct nlm_res *resp = &req->a_res;
600 int status; 610 int status;
601 611
@@ -604,7 +614,9 @@ nlmclnt_unlock(struct nlm_rqst *req, struct file_lock *fl)
604 * request, or to deny it with NLM_LCK_DENIED_GRACE_PERIOD. In either 614 * request, or to deny it with NLM_LCK_DENIED_GRACE_PERIOD. In either
605 * case, we want to unlock. 615 * case, we want to unlock.
606 */ 616 */
617 down_read(&host->h_rwsem);
607 do_vfs_lock(fl); 618 do_vfs_lock(fl);
619 up_read(&host->h_rwsem);
608 620
609 if (req->a_flags & RPC_TASK_ASYNC) 621 if (req->a_flags & RPC_TASK_ASYNC)
610 return nlm_async_call(req, NLMPROC_UNLOCK, &nlmclnt_unlock_ops); 622 return nlm_async_call(req, NLMPROC_UNLOCK, &nlmclnt_unlock_ops);
diff --git a/fs/lockd/host.c b/fs/lockd/host.c
index 729ac427d359..38b0e8a1aec0 100644
--- a/fs/lockd/host.c
+++ b/fs/lockd/host.c
@@ -112,11 +112,12 @@ nlm_lookup_host(int server, struct sockaddr_in *sin,
112 host->h_version = version; 112 host->h_version = version;
113 host->h_proto = proto; 113 host->h_proto = proto;
114 host->h_rpcclnt = NULL; 114 host->h_rpcclnt = NULL;
115 init_MUTEX(&host->h_sema); 115 mutex_init(&host->h_mutex);
116 host->h_nextrebind = jiffies + NLM_HOST_REBIND; 116 host->h_nextrebind = jiffies + NLM_HOST_REBIND;
117 host->h_expires = jiffies + NLM_HOST_EXPIRE; 117 host->h_expires = jiffies + NLM_HOST_EXPIRE;
118 atomic_set(&host->h_count, 1); 118 atomic_set(&host->h_count, 1);
119 init_waitqueue_head(&host->h_gracewait); 119 init_waitqueue_head(&host->h_gracewait);
120 init_rwsem(&host->h_rwsem);
120 host->h_state = 0; /* pseudo NSM state */ 121 host->h_state = 0; /* pseudo NSM state */
121 host->h_nsmstate = 0; /* real NSM state */ 122 host->h_nsmstate = 0; /* real NSM state */
122 host->h_server = server; 123 host->h_server = server;
@@ -172,7 +173,7 @@ nlm_bind_host(struct nlm_host *host)
172 (unsigned)ntohl(host->h_addr.sin_addr.s_addr)); 173 (unsigned)ntohl(host->h_addr.sin_addr.s_addr));
173 174
174 /* Lock host handle */ 175 /* Lock host handle */
175 down(&host->h_sema); 176 mutex_lock(&host->h_mutex);
176 177
177 /* If we've already created an RPC client, check whether 178 /* If we've already created an RPC client, check whether
178 * RPC rebind is required 179 * RPC rebind is required
@@ -204,12 +205,12 @@ nlm_bind_host(struct nlm_host *host)
204 host->h_rpcclnt = clnt; 205 host->h_rpcclnt = clnt;
205 } 206 }
206 207
207 up(&host->h_sema); 208 mutex_unlock(&host->h_mutex);
208 return clnt; 209 return clnt;
209 210
210forgetit: 211forgetit:
211 printk("lockd: couldn't create RPC handle for %s\n", host->h_name); 212 printk("lockd: couldn't create RPC handle for %s\n", host->h_name);
212 up(&host->h_sema); 213 mutex_unlock(&host->h_mutex);
213 return NULL; 214 return NULL;
214} 215}
215 216
diff --git a/fs/namespace.c b/fs/namespace.c
index c13072a5f1ee..866430bb024d 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -585,8 +585,8 @@ static int do_umount(struct vfsmount *mnt, int flags)
585 */ 585 */
586 586
587 lock_kernel(); 587 lock_kernel();
588 if ((flags & MNT_FORCE) && sb->s_op->umount_begin) 588 if (sb->s_op->umount_begin)
589 sb->s_op->umount_begin(sb); 589 sb->s_op->umount_begin(mnt, flags);
590 unlock_kernel(); 590 unlock_kernel();
591 591
592 /* 592 /*
@@ -1172,13 +1172,46 @@ static void expire_mount(struct vfsmount *mnt, struct list_head *mounts,
1172} 1172}
1173 1173
1174/* 1174/*
1175 * go through the vfsmounts we've just consigned to the graveyard to
1176 * - check that they're still dead
1177 * - delete the vfsmount from the appropriate namespace under lock
1178 * - dispose of the corpse
1179 */
1180static void expire_mount_list(struct list_head *graveyard, struct list_head *mounts)
1181{
1182 struct namespace *namespace;
1183 struct vfsmount *mnt;
1184
1185 while (!list_empty(graveyard)) {
1186 LIST_HEAD(umounts);
1187 mnt = list_entry(graveyard->next, struct vfsmount, mnt_expire);
1188 list_del_init(&mnt->mnt_expire);
1189
1190 /* don't do anything if the namespace is dead - all the
1191 * vfsmounts from it are going away anyway */
1192 namespace = mnt->mnt_namespace;
1193 if (!namespace || !namespace->root)
1194 continue;
1195 get_namespace(namespace);
1196
1197 spin_unlock(&vfsmount_lock);
1198 down_write(&namespace_sem);
1199 expire_mount(mnt, mounts, &umounts);
1200 up_write(&namespace_sem);
1201 release_mounts(&umounts);
1202 mntput(mnt);
1203 put_namespace(namespace);
1204 spin_lock(&vfsmount_lock);
1205 }
1206}
1207
1208/*
1175 * process a list of expirable mountpoints with the intent of discarding any 1209 * process a list of expirable mountpoints with the intent of discarding any
1176 * mountpoints that aren't in use and haven't been touched since last we came 1210 * mountpoints that aren't in use and haven't been touched since last we came
1177 * here 1211 * here
1178 */ 1212 */
1179void mark_mounts_for_expiry(struct list_head *mounts) 1213void mark_mounts_for_expiry(struct list_head *mounts)
1180{ 1214{
1181 struct namespace *namespace;
1182 struct vfsmount *mnt, *next; 1215 struct vfsmount *mnt, *next;
1183 LIST_HEAD(graveyard); 1216 LIST_HEAD(graveyard);
1184 1217
@@ -1202,38 +1235,79 @@ void mark_mounts_for_expiry(struct list_head *mounts)
1202 list_move(&mnt->mnt_expire, &graveyard); 1235 list_move(&mnt->mnt_expire, &graveyard);
1203 } 1236 }
1204 1237
1205 /* 1238 expire_mount_list(&graveyard, mounts);
1206 * go through the vfsmounts we've just consigned to the graveyard to
1207 * - check that they're still dead
1208 * - delete the vfsmount from the appropriate namespace under lock
1209 * - dispose of the corpse
1210 */
1211 while (!list_empty(&graveyard)) {
1212 LIST_HEAD(umounts);
1213 mnt = list_entry(graveyard.next, struct vfsmount, mnt_expire);
1214 list_del_init(&mnt->mnt_expire);
1215 1239
1216 /* don't do anything if the namespace is dead - all the 1240 spin_unlock(&vfsmount_lock);
1217 * vfsmounts from it are going away anyway */ 1241}
1218 namespace = mnt->mnt_namespace; 1242
1219 if (!namespace || !namespace->root) 1243EXPORT_SYMBOL_GPL(mark_mounts_for_expiry);
1244
1245/*
1246 * Ripoff of 'select_parent()'
1247 *
1248 * search the list of submounts for a given mountpoint, and move any
1249 * shrinkable submounts to the 'graveyard' list.
1250 */
1251static int select_submounts(struct vfsmount *parent, struct list_head *graveyard)
1252{
1253 struct vfsmount *this_parent = parent;
1254 struct list_head *next;
1255 int found = 0;
1256
1257repeat:
1258 next = this_parent->mnt_mounts.next;
1259resume:
1260 while (next != &this_parent->mnt_mounts) {
1261 struct list_head *tmp = next;
1262 struct vfsmount *mnt = list_entry(tmp, struct vfsmount, mnt_child);
1263
1264 next = tmp->next;
1265 if (!(mnt->mnt_flags & MNT_SHRINKABLE))
1220 continue; 1266 continue;
1221 get_namespace(namespace); 1267 /*
1268 * Descend a level if the d_mounts list is non-empty.
1269 */
1270 if (!list_empty(&mnt->mnt_mounts)) {
1271 this_parent = mnt;
1272 goto repeat;
1273 }
1222 1274
1223 spin_unlock(&vfsmount_lock); 1275 if (!propagate_mount_busy(mnt, 1)) {
1224 down_write(&namespace_sem); 1276 mntget(mnt);
1225 expire_mount(mnt, mounts, &umounts); 1277 list_move_tail(&mnt->mnt_expire, graveyard);
1226 up_write(&namespace_sem); 1278 found++;
1227 release_mounts(&umounts); 1279 }
1228 mntput(mnt);
1229 put_namespace(namespace);
1230 spin_lock(&vfsmount_lock);
1231 } 1280 }
1281 /*
1282 * All done at this level ... ascend and resume the search
1283 */
1284 if (this_parent != parent) {
1285 next = this_parent->mnt_child.next;
1286 this_parent = this_parent->mnt_parent;
1287 goto resume;
1288 }
1289 return found;
1290}
1291
1292/*
1293 * process a list of expirable mountpoints with the intent of discarding any
1294 * submounts of a specific parent mountpoint
1295 */
1296void shrink_submounts(struct vfsmount *mountpoint, struct list_head *mounts)
1297{
1298 LIST_HEAD(graveyard);
1299 int found;
1300
1301 spin_lock(&vfsmount_lock);
1302
1303 /* extract submounts of 'mountpoint' from the expiration list */
1304 while ((found = select_submounts(mountpoint, &graveyard)) != 0)
1305 expire_mount_list(&graveyard, mounts);
1232 1306
1233 spin_unlock(&vfsmount_lock); 1307 spin_unlock(&vfsmount_lock);
1234} 1308}
1235 1309
1236EXPORT_SYMBOL_GPL(mark_mounts_for_expiry); 1310EXPORT_SYMBOL_GPL(shrink_submounts);
1237 1311
1238/* 1312/*
1239 * Some copy_from_user() implementations do not return the exact number of 1313 * Some copy_from_user() implementations do not return the exact number of
diff --git a/fs/nfs/Makefile b/fs/nfs/Makefile
index ec61fd56a1a9..0b572a0c1967 100644
--- a/fs/nfs/Makefile
+++ b/fs/nfs/Makefile
@@ -4,14 +4,16 @@
4 4
5obj-$(CONFIG_NFS_FS) += nfs.o 5obj-$(CONFIG_NFS_FS) += nfs.o
6 6
7nfs-y := dir.o file.o inode.o nfs2xdr.o pagelist.o \ 7nfs-y := dir.o file.o inode.o super.o nfs2xdr.o pagelist.o \
8 proc.o read.o symlink.o unlink.o write.o 8 proc.o read.o symlink.o unlink.o write.o \
9 namespace.o
9nfs-$(CONFIG_ROOT_NFS) += nfsroot.o mount_clnt.o 10nfs-$(CONFIG_ROOT_NFS) += nfsroot.o mount_clnt.o
10nfs-$(CONFIG_NFS_V3) += nfs3proc.o nfs3xdr.o 11nfs-$(CONFIG_NFS_V3) += nfs3proc.o nfs3xdr.o
11nfs-$(CONFIG_NFS_V3_ACL) += nfs3acl.o 12nfs-$(CONFIG_NFS_V3_ACL) += nfs3acl.o
12nfs-$(CONFIG_NFS_V4) += nfs4proc.o nfs4xdr.o nfs4state.o nfs4renewd.o \ 13nfs-$(CONFIG_NFS_V4) += nfs4proc.o nfs4xdr.o nfs4state.o nfs4renewd.o \
13 delegation.o idmap.o \ 14 delegation.o idmap.o \
14 callback.o callback_xdr.o callback_proc.o 15 callback.o callback_xdr.o callback_proc.o \
16 nfs4namespace.o
15nfs-$(CONFIG_NFS_DIRECTIO) += direct.o 17nfs-$(CONFIG_NFS_DIRECTIO) += direct.o
16nfs-$(CONFIG_SYSCTL) += sysctl.o 18nfs-$(CONFIG_SYSCTL) += sysctl.o
17nfs-objs := $(nfs-y) 19nfs-objs := $(nfs-y)
diff --git a/fs/nfs/callback.c b/fs/nfs/callback.c
index 90c95adc8c1b..d53f8c6a9ecb 100644
--- a/fs/nfs/callback.c
+++ b/fs/nfs/callback.c
@@ -182,8 +182,6 @@ static int nfs_callback_authenticate(struct svc_rqst *rqstp)
182/* 182/*
183 * Define NFS4 callback program 183 * Define NFS4 callback program
184 */ 184 */
185extern struct svc_version nfs4_callback_version1;
186
187static struct svc_version *nfs4_callback_version[] = { 185static struct svc_version *nfs4_callback_version[] = {
188 [1] = &nfs4_callback_version1, 186 [1] = &nfs4_callback_version1,
189}; 187};
diff --git a/fs/nfs/callback_xdr.c b/fs/nfs/callback_xdr.c
index 05c38cf40b69..c92991328d9a 100644
--- a/fs/nfs/callback_xdr.c
+++ b/fs/nfs/callback_xdr.c
@@ -202,7 +202,7 @@ static unsigned decode_recall_args(struct svc_rqst *rqstp, struct xdr_stream *xd
202 status = decode_fh(xdr, &args->fh); 202 status = decode_fh(xdr, &args->fh);
203out: 203out:
204 dprintk("%s: exit with status = %d\n", __FUNCTION__, status); 204 dprintk("%s: exit with status = %d\n", __FUNCTION__, status);
205 return 0; 205 return status;
206} 206}
207 207
208static unsigned encode_string(struct xdr_stream *xdr, unsigned int len, const char *str) 208static unsigned encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
index cae74dd4c7f5..3ddda6f7ecc2 100644
--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c
@@ -528,7 +528,7 @@ static int nfs_readdir(struct file *filp, void *dirent, filldir_t filldir)
528 528
529 lock_kernel(); 529 lock_kernel();
530 530
531 res = nfs_revalidate_inode(NFS_SERVER(inode), inode); 531 res = nfs_revalidate_mapping(inode, filp->f_mapping);
532 if (res < 0) { 532 if (res < 0) {
533 unlock_kernel(); 533 unlock_kernel();
534 return res; 534 return res;
@@ -868,6 +868,17 @@ int nfs_is_exclusive_create(struct inode *dir, struct nameidata *nd)
868 return (nd->intent.open.flags & O_EXCL) != 0; 868 return (nd->intent.open.flags & O_EXCL) != 0;
869} 869}
870 870
871static inline int nfs_reval_fsid(struct inode *dir,
872 struct nfs_fh *fh, struct nfs_fattr *fattr)
873{
874 struct nfs_server *server = NFS_SERVER(dir);
875
876 if (!nfs_fsid_equal(&server->fsid, &fattr->fsid))
877 /* Revalidate fsid on root dir */
878 return __nfs_revalidate_inode(server, dir->i_sb->s_root->d_inode);
879 return 0;
880}
881
871static struct dentry *nfs_lookup(struct inode *dir, struct dentry * dentry, struct nameidata *nd) 882static struct dentry *nfs_lookup(struct inode *dir, struct dentry * dentry, struct nameidata *nd)
872{ 883{
873 struct dentry *res; 884 struct dentry *res;
@@ -900,6 +911,11 @@ static struct dentry *nfs_lookup(struct inode *dir, struct dentry * dentry, stru
900 res = ERR_PTR(error); 911 res = ERR_PTR(error);
901 goto out_unlock; 912 goto out_unlock;
902 } 913 }
914 error = nfs_reval_fsid(dir, &fhandle, &fattr);
915 if (error < 0) {
916 res = ERR_PTR(error);
917 goto out_unlock;
918 }
903 inode = nfs_fhget(dentry->d_sb, &fhandle, &fattr); 919 inode = nfs_fhget(dentry->d_sb, &fhandle, &fattr);
904 res = (struct dentry *)inode; 920 res = (struct dentry *)inode;
905 if (IS_ERR(res)) 921 if (IS_ERR(res))
diff --git a/fs/nfs/direct.c b/fs/nfs/direct.c
index 3c72b0c07283..402005c35ab3 100644
--- a/fs/nfs/direct.c
+++ b/fs/nfs/direct.c
@@ -892,7 +892,7 @@ out:
892 * nfs_init_directcache - create a slab cache for nfs_direct_req structures 892 * nfs_init_directcache - create a slab cache for nfs_direct_req structures
893 * 893 *
894 */ 894 */
895int nfs_init_directcache(void) 895int __init nfs_init_directcache(void)
896{ 896{
897 nfs_direct_cachep = kmem_cache_create("nfs_direct_cache", 897 nfs_direct_cachep = kmem_cache_create("nfs_direct_cache",
898 sizeof(struct nfs_direct_req), 898 sizeof(struct nfs_direct_req),
@@ -906,10 +906,10 @@ int nfs_init_directcache(void)
906} 906}
907 907
908/** 908/**
909 * nfs_init_directcache - destroy the slab cache for nfs_direct_req structures 909 * nfs_destroy_directcache - destroy the slab cache for nfs_direct_req structures
910 * 910 *
911 */ 911 */
912void nfs_destroy_directcache(void) 912void __exit nfs_destroy_directcache(void)
913{ 913{
914 if (kmem_cache_destroy(nfs_direct_cachep)) 914 if (kmem_cache_destroy(nfs_direct_cachep))
915 printk(KERN_INFO "nfs_direct_cache: not all structures were freed\n"); 915 printk(KERN_INFO "nfs_direct_cache: not all structures were freed\n");
diff --git a/fs/nfs/file.c b/fs/nfs/file.c
index fa05c027ea11..add289138836 100644
--- a/fs/nfs/file.c
+++ b/fs/nfs/file.c
@@ -127,23 +127,6 @@ nfs_file_release(struct inode *inode, struct file *filp)
127} 127}
128 128
129/** 129/**
130 * nfs_revalidate_file - Revalidate the page cache & related metadata
131 * @inode - pointer to inode struct
132 * @file - pointer to file
133 */
134static int nfs_revalidate_file(struct inode *inode, struct file *filp)
135{
136 struct nfs_inode *nfsi = NFS_I(inode);
137 int retval = 0;
138
139 if ((nfsi->cache_validity & (NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_ATTR))
140 || nfs_attribute_timeout(inode))
141 retval = __nfs_revalidate_inode(NFS_SERVER(inode), inode);
142 nfs_revalidate_mapping(inode, filp->f_mapping);
143 return 0;
144}
145
146/**
147 * nfs_revalidate_size - Revalidate the file size 130 * nfs_revalidate_size - Revalidate the file size
148 * @inode - pointer to inode struct 131 * @inode - pointer to inode struct
149 * @file - pointer to struct file 132 * @file - pointer to struct file
@@ -228,7 +211,7 @@ nfs_file_read(struct kiocb *iocb, char __user * buf, size_t count, loff_t pos)
228 dentry->d_parent->d_name.name, dentry->d_name.name, 211 dentry->d_parent->d_name.name, dentry->d_name.name,
229 (unsigned long) count, (unsigned long) pos); 212 (unsigned long) count, (unsigned long) pos);
230 213
231 result = nfs_revalidate_file(inode, iocb->ki_filp); 214 result = nfs_revalidate_mapping(inode, iocb->ki_filp->f_mapping);
232 nfs_add_stats(inode, NFSIOS_NORMALREADBYTES, count); 215 nfs_add_stats(inode, NFSIOS_NORMALREADBYTES, count);
233 if (!result) 216 if (!result)
234 result = generic_file_aio_read(iocb, buf, count, pos); 217 result = generic_file_aio_read(iocb, buf, count, pos);
@@ -247,7 +230,7 @@ nfs_file_sendfile(struct file *filp, loff_t *ppos, size_t count,
247 dentry->d_parent->d_name.name, dentry->d_name.name, 230 dentry->d_parent->d_name.name, dentry->d_name.name,
248 (unsigned long) count, (unsigned long long) *ppos); 231 (unsigned long) count, (unsigned long long) *ppos);
249 232
250 res = nfs_revalidate_file(inode, filp); 233 res = nfs_revalidate_mapping(inode, filp->f_mapping);
251 if (!res) 234 if (!res)
252 res = generic_file_sendfile(filp, ppos, count, actor, target); 235 res = generic_file_sendfile(filp, ppos, count, actor, target);
253 return res; 236 return res;
@@ -263,7 +246,7 @@ nfs_file_mmap(struct file * file, struct vm_area_struct * vma)
263 dfprintk(VFS, "nfs: mmap(%s/%s)\n", 246 dfprintk(VFS, "nfs: mmap(%s/%s)\n",
264 dentry->d_parent->d_name.name, dentry->d_name.name); 247 dentry->d_parent->d_name.name, dentry->d_name.name);
265 248
266 status = nfs_revalidate_file(inode, file); 249 status = nfs_revalidate_mapping(inode, file->f_mapping);
267 if (!status) 250 if (!status)
268 status = generic_file_mmap(file, vma); 251 status = generic_file_mmap(file, vma);
269 return status; 252 return status;
@@ -320,7 +303,11 @@ static int nfs_commit_write(struct file *file, struct page *page, unsigned offse
320 303
321static void nfs_invalidate_page(struct page *page, unsigned long offset) 304static void nfs_invalidate_page(struct page *page, unsigned long offset)
322{ 305{
323 /* FIXME: we really should cancel any unstarted writes on this page */ 306 struct inode *inode = page->mapping->host;
307
308 /* Cancel any unstarted writes on this page */
309 if (offset == 0)
310 nfs_sync_inode_wait(inode, page->index, 1, FLUSH_INVALIDATE);
324} 311}
325 312
326static int nfs_release_page(struct page *page, gfp_t gfp) 313static int nfs_release_page(struct page *page, gfp_t gfp)
@@ -373,7 +360,6 @@ nfs_file_write(struct kiocb *iocb, const char __user *buf, size_t count, loff_t
373 if (result) 360 if (result)
374 goto out; 361 goto out;
375 } 362 }
376 nfs_revalidate_mapping(inode, iocb->ki_filp->f_mapping);
377 363
378 result = count; 364 result = count;
379 if (!count) 365 if (!count)
diff --git a/fs/nfs/idmap.c b/fs/nfs/idmap.c
index 3fab5b0cfc5a..b81e7ed3c902 100644
--- a/fs/nfs/idmap.c
+++ b/fs/nfs/idmap.c
@@ -47,7 +47,6 @@
47#include <linux/workqueue.h> 47#include <linux/workqueue.h>
48#include <linux/sunrpc/rpc_pipe_fs.h> 48#include <linux/sunrpc/rpc_pipe_fs.h>
49 49
50#include <linux/nfs_fs_sb.h>
51#include <linux/nfs_fs.h> 50#include <linux/nfs_fs.h>
52 51
53#include <linux/nfs_idmap.h> 52#include <linux/nfs_idmap.h>
diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c
index 937fbfc381bb..51bc88b662fe 100644
--- a/fs/nfs/inode.c
+++ b/fs/nfs/inode.c
@@ -36,6 +36,8 @@
36#include <linux/mount.h> 36#include <linux/mount.h>
37#include <linux/nfs_idmap.h> 37#include <linux/nfs_idmap.h>
38#include <linux/vfs.h> 38#include <linux/vfs.h>
39#include <linux/inet.h>
40#include <linux/nfs_xdr.h>
39 41
40#include <asm/system.h> 42#include <asm/system.h>
41#include <asm/uaccess.h> 43#include <asm/uaccess.h>
@@ -44,89 +46,17 @@
44#include "callback.h" 46#include "callback.h"
45#include "delegation.h" 47#include "delegation.h"
46#include "iostat.h" 48#include "iostat.h"
49#include "internal.h"
47 50
48#define NFSDBG_FACILITY NFSDBG_VFS 51#define NFSDBG_FACILITY NFSDBG_VFS
49#define NFS_PARANOIA 1 52#define NFS_PARANOIA 1
50 53
51/* Maximum number of readahead requests
52 * FIXME: this should really be a sysctl so that users may tune it to suit
53 * their needs. People that do NFS over a slow network, might for
54 * instance want to reduce it to something closer to 1 for improved
55 * interactive response.
56 */
57#define NFS_MAX_READAHEAD (RPC_DEF_SLOT_TABLE - 1)
58
59static void nfs_invalidate_inode(struct inode *); 54static void nfs_invalidate_inode(struct inode *);
60static int nfs_update_inode(struct inode *, struct nfs_fattr *); 55static int nfs_update_inode(struct inode *, struct nfs_fattr *);
61 56
62static struct inode *nfs_alloc_inode(struct super_block *sb);
63static void nfs_destroy_inode(struct inode *);
64static int nfs_write_inode(struct inode *,int);
65static void nfs_delete_inode(struct inode *);
66static void nfs_clear_inode(struct inode *);
67static void nfs_umount_begin(struct super_block *);
68static int nfs_statfs(struct dentry *, struct kstatfs *);
69static int nfs_show_options(struct seq_file *, struct vfsmount *);
70static int nfs_show_stats(struct seq_file *, struct vfsmount *);
71static void nfs_zap_acl_cache(struct inode *); 57static void nfs_zap_acl_cache(struct inode *);
72 58
73static struct rpc_program nfs_program; 59static kmem_cache_t * nfs_inode_cachep;
74
75static struct super_operations nfs_sops = {
76 .alloc_inode = nfs_alloc_inode,
77 .destroy_inode = nfs_destroy_inode,
78 .write_inode = nfs_write_inode,
79 .delete_inode = nfs_delete_inode,
80 .statfs = nfs_statfs,
81 .clear_inode = nfs_clear_inode,
82 .umount_begin = nfs_umount_begin,
83 .show_options = nfs_show_options,
84 .show_stats = nfs_show_stats,
85};
86
87/*
88 * RPC cruft for NFS
89 */
90static struct rpc_stat nfs_rpcstat = {
91 .program = &nfs_program
92};
93static struct rpc_version * nfs_version[] = {
94 NULL,
95 NULL,
96 &nfs_version2,
97#if defined(CONFIG_NFS_V3)
98 &nfs_version3,
99#elif defined(CONFIG_NFS_V4)
100 NULL,
101#endif
102#if defined(CONFIG_NFS_V4)
103 &nfs_version4,
104#endif
105};
106
107static struct rpc_program nfs_program = {
108 .name = "nfs",
109 .number = NFS_PROGRAM,
110 .nrvers = ARRAY_SIZE(nfs_version),
111 .version = nfs_version,
112 .stats = &nfs_rpcstat,
113 .pipe_dir_name = "/nfs",
114};
115
116#ifdef CONFIG_NFS_V3_ACL
117static struct rpc_stat nfsacl_rpcstat = { &nfsacl_program };
118static struct rpc_version * nfsacl_version[] = {
119 [3] = &nfsacl_version3,
120};
121
122struct rpc_program nfsacl_program = {
123 .name = "nfsacl",
124 .number = NFS_ACL_PROGRAM,
125 .nrvers = ARRAY_SIZE(nfsacl_version),
126 .version = nfsacl_version,
127 .stats = &nfsacl_rpcstat,
128};
129#endif /* CONFIG_NFS_V3_ACL */
130 60
131static inline unsigned long 61static inline unsigned long
132nfs_fattr_to_ino_t(struct nfs_fattr *fattr) 62nfs_fattr_to_ino_t(struct nfs_fattr *fattr)
@@ -134,8 +64,7 @@ nfs_fattr_to_ino_t(struct nfs_fattr *fattr)
134 return nfs_fileid_to_ino_t(fattr->fileid); 64 return nfs_fileid_to_ino_t(fattr->fileid);
135} 65}
136 66
137static int 67int nfs_write_inode(struct inode *inode, int sync)
138nfs_write_inode(struct inode *inode, int sync)
139{ 68{
140 int flags = sync ? FLUSH_SYNC : 0; 69 int flags = sync ? FLUSH_SYNC : 0;
141 int ret; 70 int ret;
@@ -146,31 +75,15 @@ nfs_write_inode(struct inode *inode, int sync)
146 return 0; 75 return 0;
147} 76}
148 77
149static void 78void nfs_clear_inode(struct inode *inode)
150nfs_delete_inode(struct inode * inode)
151{ 79{
152 dprintk("NFS: delete_inode(%s/%ld)\n", inode->i_sb->s_id, inode->i_ino); 80 struct nfs_inode *nfsi = NFS_I(inode);
153 81 struct rpc_cred *cred;
154 truncate_inode_pages(&inode->i_data, 0);
155 82
156 nfs_wb_all(inode);
157 /* 83 /*
158 * The following should never happen... 84 * The following should never happen...
159 */ 85 */
160 if (nfs_have_writebacks(inode)) { 86 BUG_ON(nfs_have_writebacks(inode));
161 printk(KERN_ERR "nfs_delete_inode: inode %ld has pending RPC requests\n", inode->i_ino);
162 }
163
164 clear_inode(inode);
165}
166
167static void
168nfs_clear_inode(struct inode *inode)
169{
170 struct nfs_inode *nfsi = NFS_I(inode);
171 struct rpc_cred *cred;
172
173 nfs_wb_all(inode);
174 BUG_ON (!list_empty(&nfsi->open_files)); 87 BUG_ON (!list_empty(&nfsi->open_files));
175 nfs_zap_acl_cache(inode); 88 nfs_zap_acl_cache(inode);
176 cred = nfsi->cache_access.cred; 89 cred = nfsi->cache_access.cred;
@@ -179,555 +92,6 @@ nfs_clear_inode(struct inode *inode)
179 BUG_ON(atomic_read(&nfsi->data_updates) != 0); 92 BUG_ON(atomic_read(&nfsi->data_updates) != 0);
180} 93}
181 94
182void
183nfs_umount_begin(struct super_block *sb)
184{
185 struct rpc_clnt *rpc = NFS_SB(sb)->client;
186
187 /* -EIO all pending I/O */
188 if (!IS_ERR(rpc))
189 rpc_killall_tasks(rpc);
190 rpc = NFS_SB(sb)->client_acl;
191 if (!IS_ERR(rpc))
192 rpc_killall_tasks(rpc);
193}
194
195
196static inline unsigned long
197nfs_block_bits(unsigned long bsize, unsigned char *nrbitsp)
198{
199 /* make sure blocksize is a power of two */
200 if ((bsize & (bsize - 1)) || nrbitsp) {
201 unsigned char nrbits;
202
203 for (nrbits = 31; nrbits && !(bsize & (1 << nrbits)); nrbits--)
204 ;
205 bsize = 1 << nrbits;
206 if (nrbitsp)
207 *nrbitsp = nrbits;
208 }
209
210 return bsize;
211}
212
213/*
214 * Calculate the number of 512byte blocks used.
215 */
216static inline unsigned long
217nfs_calc_block_size(u64 tsize)
218{
219 loff_t used = (tsize + 511) >> 9;
220 return (used > ULONG_MAX) ? ULONG_MAX : used;
221}
222
223/*
224 * Compute and set NFS server blocksize
225 */
226static inline unsigned long
227nfs_block_size(unsigned long bsize, unsigned char *nrbitsp)
228{
229 if (bsize < NFS_MIN_FILE_IO_SIZE)
230 bsize = NFS_DEF_FILE_IO_SIZE;
231 else if (bsize >= NFS_MAX_FILE_IO_SIZE)
232 bsize = NFS_MAX_FILE_IO_SIZE;
233
234 return nfs_block_bits(bsize, nrbitsp);
235}
236
237/*
238 * Obtain the root inode of the file system.
239 */
240static struct inode *
241nfs_get_root(struct super_block *sb, struct nfs_fh *rootfh, struct nfs_fsinfo *fsinfo)
242{
243 struct nfs_server *server = NFS_SB(sb);
244 int error;
245
246 error = server->rpc_ops->getroot(server, rootfh, fsinfo);
247 if (error < 0) {
248 dprintk("nfs_get_root: getattr error = %d\n", -error);
249 return ERR_PTR(error);
250 }
251
252 return nfs_fhget(sb, rootfh, fsinfo->fattr);
253}
254
255/*
256 * Do NFS version-independent mount processing, and sanity checking
257 */
258static int
259nfs_sb_init(struct super_block *sb, rpc_authflavor_t authflavor)
260{
261 struct nfs_server *server;
262 struct inode *root_inode;
263 struct nfs_fattr fattr;
264 struct nfs_fsinfo fsinfo = {
265 .fattr = &fattr,
266 };
267 struct nfs_pathconf pathinfo = {
268 .fattr = &fattr,
269 };
270 int no_root_error = 0;
271 unsigned long max_rpc_payload;
272
273 /* We probably want something more informative here */
274 snprintf(sb->s_id, sizeof(sb->s_id), "%x:%x", MAJOR(sb->s_dev), MINOR(sb->s_dev));
275
276 server = NFS_SB(sb);
277
278 sb->s_magic = NFS_SUPER_MAGIC;
279
280 server->io_stats = nfs_alloc_iostats();
281 if (server->io_stats == NULL)
282 return -ENOMEM;
283
284 root_inode = nfs_get_root(sb, &server->fh, &fsinfo);
285 /* Did getting the root inode fail? */
286 if (IS_ERR(root_inode)) {
287 no_root_error = PTR_ERR(root_inode);
288 goto out_no_root;
289 }
290 sb->s_root = d_alloc_root(root_inode);
291 if (!sb->s_root) {
292 no_root_error = -ENOMEM;
293 goto out_no_root;
294 }
295 sb->s_root->d_op = server->rpc_ops->dentry_ops;
296
297 /* mount time stamp, in seconds */
298 server->mount_time = jiffies;
299
300 /* Get some general file system info */
301 if (server->namelen == 0 &&
302 server->rpc_ops->pathconf(server, &server->fh, &pathinfo) >= 0)
303 server->namelen = pathinfo.max_namelen;
304 /* Work out a lot of parameters */
305 if (server->rsize == 0)
306 server->rsize = nfs_block_size(fsinfo.rtpref, NULL);
307 if (server->wsize == 0)
308 server->wsize = nfs_block_size(fsinfo.wtpref, NULL);
309
310 if (fsinfo.rtmax >= 512 && server->rsize > fsinfo.rtmax)
311 server->rsize = nfs_block_size(fsinfo.rtmax, NULL);
312 if (fsinfo.wtmax >= 512 && server->wsize > fsinfo.wtmax)
313 server->wsize = nfs_block_size(fsinfo.wtmax, NULL);
314
315 max_rpc_payload = nfs_block_size(rpc_max_payload(server->client), NULL);
316 if (server->rsize > max_rpc_payload)
317 server->rsize = max_rpc_payload;
318 if (server->rsize > NFS_MAX_FILE_IO_SIZE)
319 server->rsize = NFS_MAX_FILE_IO_SIZE;
320 server->rpages = (server->rsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
321
322 if (server->wsize > max_rpc_payload)
323 server->wsize = max_rpc_payload;
324 if (server->wsize > NFS_MAX_FILE_IO_SIZE)
325 server->wsize = NFS_MAX_FILE_IO_SIZE;
326 server->wpages = (server->wsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
327
328 if (sb->s_blocksize == 0)
329 sb->s_blocksize = nfs_block_bits(server->wsize,
330 &sb->s_blocksize_bits);
331 server->wtmult = nfs_block_bits(fsinfo.wtmult, NULL);
332
333 server->dtsize = nfs_block_size(fsinfo.dtpref, NULL);
334 if (server->dtsize > PAGE_CACHE_SIZE)
335 server->dtsize = PAGE_CACHE_SIZE;
336 if (server->dtsize > server->rsize)
337 server->dtsize = server->rsize;
338
339 if (server->flags & NFS_MOUNT_NOAC) {
340 server->acregmin = server->acregmax = 0;
341 server->acdirmin = server->acdirmax = 0;
342 sb->s_flags |= MS_SYNCHRONOUS;
343 }
344 server->backing_dev_info.ra_pages = server->rpages * NFS_MAX_READAHEAD;
345
346 sb->s_maxbytes = fsinfo.maxfilesize;
347 if (sb->s_maxbytes > MAX_LFS_FILESIZE)
348 sb->s_maxbytes = MAX_LFS_FILESIZE;
349
350 server->client->cl_intr = (server->flags & NFS_MOUNT_INTR) ? 1 : 0;
351 server->client->cl_softrtry = (server->flags & NFS_MOUNT_SOFT) ? 1 : 0;
352
353 /* We're airborne Set socket buffersize */
354 rpc_setbufsize(server->client, server->wsize + 100, server->rsize + 100);
355 return 0;
356 /* Yargs. It didn't work out. */
357out_no_root:
358 dprintk("nfs_sb_init: get root inode failed: errno %d\n", -no_root_error);
359 if (!IS_ERR(root_inode))
360 iput(root_inode);
361 return no_root_error;
362}
363
364static void nfs_init_timeout_values(struct rpc_timeout *to, int proto, unsigned int timeo, unsigned int retrans)
365{
366 to->to_initval = timeo * HZ / 10;
367 to->to_retries = retrans;
368 if (!to->to_retries)
369 to->to_retries = 2;
370
371 switch (proto) {
372 case IPPROTO_TCP:
373 if (!to->to_initval)
374 to->to_initval = 60 * HZ;
375 if (to->to_initval > NFS_MAX_TCP_TIMEOUT)
376 to->to_initval = NFS_MAX_TCP_TIMEOUT;
377 to->to_increment = to->to_initval;
378 to->to_maxval = to->to_initval + (to->to_increment * to->to_retries);
379 to->to_exponential = 0;
380 break;
381 case IPPROTO_UDP:
382 default:
383 if (!to->to_initval)
384 to->to_initval = 11 * HZ / 10;
385 if (to->to_initval > NFS_MAX_UDP_TIMEOUT)
386 to->to_initval = NFS_MAX_UDP_TIMEOUT;
387 to->to_maxval = NFS_MAX_UDP_TIMEOUT;
388 to->to_exponential = 1;
389 break;
390 }
391}
392
393/*
394 * Create an RPC client handle.
395 */
396static struct rpc_clnt *
397nfs_create_client(struct nfs_server *server, const struct nfs_mount_data *data)
398{
399 struct rpc_timeout timeparms;
400 struct rpc_xprt *xprt = NULL;
401 struct rpc_clnt *clnt = NULL;
402 int proto = (data->flags & NFS_MOUNT_TCP) ? IPPROTO_TCP : IPPROTO_UDP;
403
404 nfs_init_timeout_values(&timeparms, proto, data->timeo, data->retrans);
405
406 server->retrans_timeo = timeparms.to_initval;
407 server->retrans_count = timeparms.to_retries;
408
409 /* create transport and client */
410 xprt = xprt_create_proto(proto, &server->addr, &timeparms);
411 if (IS_ERR(xprt)) {
412 dprintk("%s: cannot create RPC transport. Error = %ld\n",
413 __FUNCTION__, PTR_ERR(xprt));
414 return (struct rpc_clnt *)xprt;
415 }
416 clnt = rpc_create_client(xprt, server->hostname, &nfs_program,
417 server->rpc_ops->version, data->pseudoflavor);
418 if (IS_ERR(clnt)) {
419 dprintk("%s: cannot create RPC client. Error = %ld\n",
420 __FUNCTION__, PTR_ERR(xprt));
421 goto out_fail;
422 }
423
424 clnt->cl_intr = 1;
425 clnt->cl_softrtry = 1;
426
427 return clnt;
428
429out_fail:
430 return clnt;
431}
432
433/*
434 * The way this works is that the mount process passes a structure
435 * in the data argument which contains the server's IP address
436 * and the root file handle obtained from the server's mount
437 * daemon. We stash these away in the private superblock fields.
438 */
439static int
440nfs_fill_super(struct super_block *sb, struct nfs_mount_data *data, int silent)
441{
442 struct nfs_server *server;
443 rpc_authflavor_t authflavor;
444
445 server = NFS_SB(sb);
446 sb->s_blocksize_bits = 0;
447 sb->s_blocksize = 0;
448 if (data->bsize)
449 sb->s_blocksize = nfs_block_size(data->bsize, &sb->s_blocksize_bits);
450 if (data->rsize)
451 server->rsize = nfs_block_size(data->rsize, NULL);
452 if (data->wsize)
453 server->wsize = nfs_block_size(data->wsize, NULL);
454 server->flags = data->flags & NFS_MOUNT_FLAGMASK;
455
456 server->acregmin = data->acregmin*HZ;
457 server->acregmax = data->acregmax*HZ;
458 server->acdirmin = data->acdirmin*HZ;
459 server->acdirmax = data->acdirmax*HZ;
460
461 /* Start lockd here, before we might error out */
462 if (!(server->flags & NFS_MOUNT_NONLM))
463 lockd_up();
464
465 server->namelen = data->namlen;
466 server->hostname = kmalloc(strlen(data->hostname) + 1, GFP_KERNEL);
467 if (!server->hostname)
468 return -ENOMEM;
469 strcpy(server->hostname, data->hostname);
470
471 /* Check NFS protocol revision and initialize RPC op vector
472 * and file handle pool. */
473#ifdef CONFIG_NFS_V3
474 if (server->flags & NFS_MOUNT_VER3) {
475 server->rpc_ops = &nfs_v3_clientops;
476 server->caps |= NFS_CAP_READDIRPLUS;
477 } else {
478 server->rpc_ops = &nfs_v2_clientops;
479 }
480#else
481 server->rpc_ops = &nfs_v2_clientops;
482#endif
483
484 /* Fill in pseudoflavor for mount version < 5 */
485 if (!(data->flags & NFS_MOUNT_SECFLAVOUR))
486 data->pseudoflavor = RPC_AUTH_UNIX;
487 authflavor = data->pseudoflavor; /* save for sb_init() */
488 /* XXX maybe we want to add a server->pseudoflavor field */
489
490 /* Create RPC client handles */
491 server->client = nfs_create_client(server, data);
492 if (IS_ERR(server->client))
493 return PTR_ERR(server->client);
494 /* RFC 2623, sec 2.3.2 */
495 if (authflavor != RPC_AUTH_UNIX) {
496 struct rpc_auth *auth;
497
498 server->client_sys = rpc_clone_client(server->client);
499 if (IS_ERR(server->client_sys))
500 return PTR_ERR(server->client_sys);
501 auth = rpcauth_create(RPC_AUTH_UNIX, server->client_sys);
502 if (IS_ERR(auth))
503 return PTR_ERR(auth);
504 } else {
505 atomic_inc(&server->client->cl_count);
506 server->client_sys = server->client;
507 }
508 if (server->flags & NFS_MOUNT_VER3) {
509#ifdef CONFIG_NFS_V3_ACL
510 if (!(server->flags & NFS_MOUNT_NOACL)) {
511 server->client_acl = rpc_bind_new_program(server->client, &nfsacl_program, 3);
512 /* No errors! Assume that Sun nfsacls are supported */
513 if (!IS_ERR(server->client_acl))
514 server->caps |= NFS_CAP_ACLS;
515 }
516#else
517 server->flags &= ~NFS_MOUNT_NOACL;
518#endif /* CONFIG_NFS_V3_ACL */
519 /*
520 * The VFS shouldn't apply the umask to mode bits. We will
521 * do so ourselves when necessary.
522 */
523 sb->s_flags |= MS_POSIXACL;
524 if (server->namelen == 0 || server->namelen > NFS3_MAXNAMLEN)
525 server->namelen = NFS3_MAXNAMLEN;
526 sb->s_time_gran = 1;
527 } else {
528 if (server->namelen == 0 || server->namelen > NFS2_MAXNAMLEN)
529 server->namelen = NFS2_MAXNAMLEN;
530 }
531
532 sb->s_op = &nfs_sops;
533 return nfs_sb_init(sb, authflavor);
534}
535
536static int
537nfs_statfs(struct dentry *dentry, struct kstatfs *buf)
538{
539 struct super_block *sb = dentry->d_sb;
540 struct nfs_server *server = NFS_SB(sb);
541 unsigned char blockbits;
542 unsigned long blockres;
543 struct nfs_fh *rootfh = NFS_FH(sb->s_root->d_inode);
544 struct nfs_fattr fattr;
545 struct nfs_fsstat res = {
546 .fattr = &fattr,
547 };
548 int error;
549
550 lock_kernel();
551
552 error = server->rpc_ops->statfs(server, rootfh, &res);
553 buf->f_type = NFS_SUPER_MAGIC;
554 if (error < 0)
555 goto out_err;
556
557 /*
558 * Current versions of glibc do not correctly handle the
559 * case where f_frsize != f_bsize. Eventually we want to
560 * report the value of wtmult in this field.
561 */
562 buf->f_frsize = sb->s_blocksize;
563
564 /*
565 * On most *nix systems, f_blocks, f_bfree, and f_bavail
566 * are reported in units of f_frsize. Linux hasn't had
567 * an f_frsize field in its statfs struct until recently,
568 * thus historically Linux's sys_statfs reports these
569 * fields in units of f_bsize.
570 */
571 buf->f_bsize = sb->s_blocksize;
572 blockbits = sb->s_blocksize_bits;
573 blockres = (1 << blockbits) - 1;
574 buf->f_blocks = (res.tbytes + blockres) >> blockbits;
575 buf->f_bfree = (res.fbytes + blockres) >> blockbits;
576 buf->f_bavail = (res.abytes + blockres) >> blockbits;
577
578 buf->f_files = res.tfiles;
579 buf->f_ffree = res.afiles;
580
581 buf->f_namelen = server->namelen;
582 out:
583 unlock_kernel();
584 return 0;
585
586 out_err:
587 dprintk("%s: statfs error = %d\n", __FUNCTION__, -error);
588 buf->f_bsize = buf->f_blocks = buf->f_bfree = buf->f_bavail = -1;
589 goto out;
590
591}
592
593static void nfs_show_mount_options(struct seq_file *m, struct nfs_server *nfss, int showdefaults)
594{
595 static struct proc_nfs_info {
596 int flag;
597 char *str;
598 char *nostr;
599 } nfs_info[] = {
600 { NFS_MOUNT_SOFT, ",soft", ",hard" },
601 { NFS_MOUNT_INTR, ",intr", "" },
602 { NFS_MOUNT_NOCTO, ",nocto", "" },
603 { NFS_MOUNT_NOAC, ",noac", "" },
604 { NFS_MOUNT_NONLM, ",nolock", "" },
605 { NFS_MOUNT_NOACL, ",noacl", "" },
606 { 0, NULL, NULL }
607 };
608 struct proc_nfs_info *nfs_infop;
609 char buf[12];
610 char *proto;
611
612 seq_printf(m, ",vers=%d", nfss->rpc_ops->version);
613 seq_printf(m, ",rsize=%d", nfss->rsize);
614 seq_printf(m, ",wsize=%d", nfss->wsize);
615 if (nfss->acregmin != 3*HZ || showdefaults)
616 seq_printf(m, ",acregmin=%d", nfss->acregmin/HZ);
617 if (nfss->acregmax != 60*HZ || showdefaults)
618 seq_printf(m, ",acregmax=%d", nfss->acregmax/HZ);
619 if (nfss->acdirmin != 30*HZ || showdefaults)
620 seq_printf(m, ",acdirmin=%d", nfss->acdirmin/HZ);
621 if (nfss->acdirmax != 60*HZ || showdefaults)
622 seq_printf(m, ",acdirmax=%d", nfss->acdirmax/HZ);
623 for (nfs_infop = nfs_info; nfs_infop->flag; nfs_infop++) {
624 if (nfss->flags & nfs_infop->flag)
625 seq_puts(m, nfs_infop->str);
626 else
627 seq_puts(m, nfs_infop->nostr);
628 }
629 switch (nfss->client->cl_xprt->prot) {
630 case IPPROTO_TCP:
631 proto = "tcp";
632 break;
633 case IPPROTO_UDP:
634 proto = "udp";
635 break;
636 default:
637 snprintf(buf, sizeof(buf), "%u", nfss->client->cl_xprt->prot);
638 proto = buf;
639 }
640 seq_printf(m, ",proto=%s", proto);
641 seq_printf(m, ",timeo=%lu", 10U * nfss->retrans_timeo / HZ);
642 seq_printf(m, ",retrans=%u", nfss->retrans_count);
643}
644
645static int nfs_show_options(struct seq_file *m, struct vfsmount *mnt)
646{
647 struct nfs_server *nfss = NFS_SB(mnt->mnt_sb);
648
649 nfs_show_mount_options(m, nfss, 0);
650
651 seq_puts(m, ",addr=");
652 seq_escape(m, nfss->hostname, " \t\n\\");
653
654 return 0;
655}
656
657static int nfs_show_stats(struct seq_file *m, struct vfsmount *mnt)
658{
659 int i, cpu;
660 struct nfs_server *nfss = NFS_SB(mnt->mnt_sb);
661 struct rpc_auth *auth = nfss->client->cl_auth;
662 struct nfs_iostats totals = { };
663
664 seq_printf(m, "statvers=%s", NFS_IOSTAT_VERS);
665
666 /*
667 * Display all mount option settings
668 */
669 seq_printf(m, "\n\topts:\t");
670 seq_puts(m, mnt->mnt_sb->s_flags & MS_RDONLY ? "ro" : "rw");
671 seq_puts(m, mnt->mnt_sb->s_flags & MS_SYNCHRONOUS ? ",sync" : "");
672 seq_puts(m, mnt->mnt_sb->s_flags & MS_NOATIME ? ",noatime" : "");
673 seq_puts(m, mnt->mnt_sb->s_flags & MS_NODIRATIME ? ",nodiratime" : "");
674 nfs_show_mount_options(m, nfss, 1);
675
676 seq_printf(m, "\n\tage:\t%lu", (jiffies - nfss->mount_time) / HZ);
677
678 seq_printf(m, "\n\tcaps:\t");
679 seq_printf(m, "caps=0x%x", nfss->caps);
680 seq_printf(m, ",wtmult=%d", nfss->wtmult);
681 seq_printf(m, ",dtsize=%d", nfss->dtsize);
682 seq_printf(m, ",bsize=%d", nfss->bsize);
683 seq_printf(m, ",namelen=%d", nfss->namelen);
684
685#ifdef CONFIG_NFS_V4
686 if (nfss->rpc_ops->version == 4) {
687 seq_printf(m, "\n\tnfsv4:\t");
688 seq_printf(m, "bm0=0x%x", nfss->attr_bitmask[0]);
689 seq_printf(m, ",bm1=0x%x", nfss->attr_bitmask[1]);
690 seq_printf(m, ",acl=0x%x", nfss->acl_bitmask);
691 }
692#endif
693
694 /*
695 * Display security flavor in effect for this mount
696 */
697 seq_printf(m, "\n\tsec:\tflavor=%d", auth->au_ops->au_flavor);
698 if (auth->au_flavor)
699 seq_printf(m, ",pseudoflavor=%d", auth->au_flavor);
700
701 /*
702 * Display superblock I/O counters
703 */
704 for_each_possible_cpu(cpu) {
705 struct nfs_iostats *stats;
706
707 preempt_disable();
708 stats = per_cpu_ptr(nfss->io_stats, cpu);
709
710 for (i = 0; i < __NFSIOS_COUNTSMAX; i++)
711 totals.events[i] += stats->events[i];
712 for (i = 0; i < __NFSIOS_BYTESMAX; i++)
713 totals.bytes[i] += stats->bytes[i];
714
715 preempt_enable();
716 }
717
718 seq_printf(m, "\n\tevents:\t");
719 for (i = 0; i < __NFSIOS_COUNTSMAX; i++)
720 seq_printf(m, "%lu ", totals.events[i]);
721 seq_printf(m, "\n\tbytes:\t");
722 for (i = 0; i < __NFSIOS_BYTESMAX; i++)
723 seq_printf(m, "%Lu ", totals.bytes[i]);
724 seq_printf(m, "\n");
725
726 rpc_print_iostats(m, nfss->client);
727
728 return 0;
729}
730
731/** 95/**
732 * nfs_sync_mapping - helper to flush all mmapped dirty data to disk 96 * nfs_sync_mapping - helper to flush all mmapped dirty data to disk
733 */ 97 */
@@ -890,6 +254,14 @@ nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr)
890 if (nfs_server_capable(inode, NFS_CAP_READDIRPLUS) 254 if (nfs_server_capable(inode, NFS_CAP_READDIRPLUS)
891 && fattr->size <= NFS_LIMIT_READDIRPLUS) 255 && fattr->size <= NFS_LIMIT_READDIRPLUS)
892 set_bit(NFS_INO_ADVISE_RDPLUS, &NFS_FLAGS(inode)); 256 set_bit(NFS_INO_ADVISE_RDPLUS, &NFS_FLAGS(inode));
257 /* Deal with crossing mountpoints */
258 if (!nfs_fsid_equal(&NFS_SB(sb)->fsid, &fattr->fsid)) {
259 if (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)
260 inode->i_op = &nfs_referral_inode_operations;
261 else
262 inode->i_op = &nfs_mountpoint_inode_operations;
263 inode->i_fop = NULL;
264 }
893 } else if (S_ISLNK(inode->i_mode)) 265 } else if (S_ISLNK(inode->i_mode))
894 inode->i_op = &nfs_symlink_inode_operations; 266 inode->i_op = &nfs_symlink_inode_operations;
895 else 267 else
@@ -1208,6 +580,7 @@ __nfs_revalidate_inode(struct nfs_server *server, struct inode *inode)
1208 dfprintk(PAGECACHE, "NFS: revalidating (%s/%Ld)\n", 580 dfprintk(PAGECACHE, "NFS: revalidating (%s/%Ld)\n",
1209 inode->i_sb->s_id, (long long)NFS_FILEID(inode)); 581 inode->i_sb->s_id, (long long)NFS_FILEID(inode));
1210 582
583 nfs_inc_stats(inode, NFSIOS_INODEREVALIDATE);
1211 lock_kernel(); 584 lock_kernel();
1212 if (!inode || is_bad_inode(inode)) 585 if (!inode || is_bad_inode(inode))
1213 goto out_nowait; 586 goto out_nowait;
@@ -1221,7 +594,7 @@ __nfs_revalidate_inode(struct nfs_server *server, struct inode *inode)
1221 status = -ESTALE; 594 status = -ESTALE;
1222 /* Do we trust the cached ESTALE? */ 595 /* Do we trust the cached ESTALE? */
1223 if (NFS_ATTRTIMEO(inode) != 0) { 596 if (NFS_ATTRTIMEO(inode) != 0) {
1224 if (nfsi->cache_validity & (NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ATIME)) { 597 if (nfsi->cache_validity & (NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ATIME)) {
1225 /* no */ 598 /* no */
1226 } else 599 } else
1227 goto out; 600 goto out;
@@ -1252,8 +625,6 @@ __nfs_revalidate_inode(struct nfs_server *server, struct inode *inode)
1252 } 625 }
1253 spin_unlock(&inode->i_lock); 626 spin_unlock(&inode->i_lock);
1254 627
1255 nfs_revalidate_mapping(inode, inode->i_mapping);
1256
1257 if (nfsi->cache_validity & NFS_INO_INVALID_ACL) 628 if (nfsi->cache_validity & NFS_INO_INVALID_ACL)
1258 nfs_zap_acl_cache(inode); 629 nfs_zap_acl_cache(inode);
1259 630
@@ -1287,8 +658,7 @@ int nfs_attribute_timeout(struct inode *inode)
1287 */ 658 */
1288int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) 659int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode)
1289{ 660{
1290 nfs_inc_stats(inode, NFSIOS_INODEREVALIDATE); 661 if (!(NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATTR)
1291 if (!(NFS_I(inode)->cache_validity & (NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA))
1292 && !nfs_attribute_timeout(inode)) 662 && !nfs_attribute_timeout(inode))
1293 return NFS_STALE(inode) ? -ESTALE : 0; 663 return NFS_STALE(inode) ? -ESTALE : 0;
1294 return __nfs_revalidate_inode(server, inode); 664 return __nfs_revalidate_inode(server, inode);
@@ -1299,9 +669,16 @@ int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode)
1299 * @inode - pointer to host inode 669 * @inode - pointer to host inode
1300 * @mapping - pointer to mapping 670 * @mapping - pointer to mapping
1301 */ 671 */
1302void nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping) 672int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping)
1303{ 673{
1304 struct nfs_inode *nfsi = NFS_I(inode); 674 struct nfs_inode *nfsi = NFS_I(inode);
675 int ret = 0;
676
677 if (NFS_STALE(inode))
678 ret = -ESTALE;
679 if ((nfsi->cache_validity & NFS_INO_REVAL_PAGECACHE)
680 || nfs_attribute_timeout(inode))
681 ret = __nfs_revalidate_inode(NFS_SERVER(inode), inode);
1305 682
1306 if (nfsi->cache_validity & NFS_INO_INVALID_DATA) { 683 if (nfsi->cache_validity & NFS_INO_INVALID_DATA) {
1307 nfs_inc_stats(inode, NFSIOS_DATAINVALIDATE); 684 nfs_inc_stats(inode, NFSIOS_DATAINVALIDATE);
@@ -1322,6 +699,7 @@ void nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping)
1322 inode->i_sb->s_id, 699 inode->i_sb->s_id,
1323 (long long)NFS_FILEID(inode)); 700 (long long)NFS_FILEID(inode));
1324 } 701 }
702 return ret;
1325} 703}
1326 704
1327/** 705/**
@@ -1361,12 +739,6 @@ static void nfs_wcc_update_inode(struct inode *inode, struct nfs_fattr *fattr)
1361{ 739{
1362 struct nfs_inode *nfsi = NFS_I(inode); 740 struct nfs_inode *nfsi = NFS_I(inode);
1363 741
1364 if ((fattr->valid & NFS_ATTR_PRE_CHANGE) != 0
1365 && nfsi->change_attr == fattr->pre_change_attr) {
1366 nfsi->change_attr = fattr->change_attr;
1367 nfsi->cache_change_attribute = jiffies;
1368 }
1369
1370 /* If we have atomic WCC data, we may update some attributes */ 742 /* If we have atomic WCC data, we may update some attributes */
1371 if ((fattr->valid & NFS_ATTR_WCC) != 0) { 743 if ((fattr->valid & NFS_ATTR_WCC) != 0) {
1372 if (timespec_equal(&inode->i_ctime, &fattr->pre_ctime)) { 744 if (timespec_equal(&inode->i_ctime, &fattr->pre_ctime)) {
@@ -1400,9 +772,6 @@ static int nfs_check_inode_attributes(struct inode *inode, struct nfs_fattr *fat
1400 int data_unstable; 772 int data_unstable;
1401 773
1402 774
1403 if ((fattr->valid & NFS_ATTR_FATTR) == 0)
1404 return 0;
1405
1406 /* Has the inode gone and changed behind our back? */ 775 /* Has the inode gone and changed behind our back? */
1407 if (nfsi->fileid != fattr->fileid 776 if (nfsi->fileid != fattr->fileid
1408 || (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) { 777 || (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) {
@@ -1415,20 +784,13 @@ static int nfs_check_inode_attributes(struct inode *inode, struct nfs_fattr *fat
1415 /* Do atomic weak cache consistency updates */ 784 /* Do atomic weak cache consistency updates */
1416 nfs_wcc_update_inode(inode, fattr); 785 nfs_wcc_update_inode(inode, fattr);
1417 786
1418 if ((fattr->valid & NFS_ATTR_FATTR_V4) != 0) { 787 if ((fattr->valid & NFS_ATTR_FATTR_V4) != 0 &&
1419 if (nfsi->change_attr == fattr->change_attr) 788 nfsi->change_attr != fattr->change_attr)
1420 goto out; 789 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE;
1421 nfsi->cache_validity |= NFS_INO_INVALID_ATTR;
1422 if (!data_unstable)
1423 nfsi->cache_validity |= NFS_INO_REVAL_PAGECACHE;
1424 }
1425 790
1426 /* Verify a few of the more important attributes */ 791 /* Verify a few of the more important attributes */
1427 if (!timespec_equal(&inode->i_mtime, &fattr->mtime)) { 792 if (!timespec_equal(&inode->i_mtime, &fattr->mtime))
1428 nfsi->cache_validity |= NFS_INO_INVALID_ATTR; 793 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE;
1429 if (!data_unstable)
1430 nfsi->cache_validity |= NFS_INO_REVAL_PAGECACHE;
1431 }
1432 794
1433 cur_size = i_size_read(inode); 795 cur_size = i_size_read(inode);
1434 new_isize = nfs_size_to_loff_t(fattr->size); 796 new_isize = nfs_size_to_loff_t(fattr->size);
@@ -1445,7 +807,6 @@ static int nfs_check_inode_attributes(struct inode *inode, struct nfs_fattr *fat
1445 if (inode->i_nlink != fattr->nlink) 807 if (inode->i_nlink != fattr->nlink)
1446 nfsi->cache_validity |= NFS_INO_INVALID_ATTR; 808 nfsi->cache_validity |= NFS_INO_INVALID_ATTR;
1447 809
1448out:
1449 if (!timespec_equal(&inode->i_atime, &fattr->atime)) 810 if (!timespec_equal(&inode->i_atime, &fattr->atime))
1450 nfsi->cache_validity |= NFS_INO_INVALID_ATIME; 811 nfsi->cache_validity |= NFS_INO_INVALID_ATIME;
1451 812
@@ -1471,7 +832,6 @@ int nfs_refresh_inode(struct inode *inode, struct nfs_fattr *fattr)
1471 if ((fattr->valid & NFS_ATTR_FATTR) == 0) 832 if ((fattr->valid & NFS_ATTR_FATTR) == 0)
1472 return 0; 833 return 0;
1473 spin_lock(&inode->i_lock); 834 spin_lock(&inode->i_lock);
1474 nfsi->cache_validity &= ~NFS_INO_REVAL_PAGECACHE;
1475 if (time_after(fattr->time_start, nfsi->last_updated)) 835 if (time_after(fattr->time_start, nfsi->last_updated))
1476 status = nfs_update_inode(inode, fattr); 836 status = nfs_update_inode(inode, fattr);
1477 else 837 else
@@ -1496,7 +856,7 @@ int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr)
1496 856
1497 spin_lock(&inode->i_lock); 857 spin_lock(&inode->i_lock);
1498 if (unlikely((fattr->valid & NFS_ATTR_FATTR) == 0)) { 858 if (unlikely((fattr->valid & NFS_ATTR_FATTR) == 0)) {
1499 nfsi->cache_validity |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS; 859 nfsi->cache_validity |= NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE;
1500 goto out; 860 goto out;
1501 } 861 }
1502 status = nfs_update_inode(inode, fattr); 862 status = nfs_update_inode(inode, fattr);
@@ -1519,6 +879,7 @@ out:
1519 */ 879 */
1520static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr) 880static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr)
1521{ 881{
882 struct nfs_server *server;
1522 struct nfs_inode *nfsi = NFS_I(inode); 883 struct nfs_inode *nfsi = NFS_I(inode);
1523 loff_t cur_isize, new_isize; 884 loff_t cur_isize, new_isize;
1524 unsigned int invalid = 0; 885 unsigned int invalid = 0;
@@ -1528,9 +889,6 @@ static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr)
1528 __FUNCTION__, inode->i_sb->s_id, inode->i_ino, 889 __FUNCTION__, inode->i_sb->s_id, inode->i_ino,
1529 atomic_read(&inode->i_count), fattr->valid); 890 atomic_read(&inode->i_count), fattr->valid);
1530 891
1531 if ((fattr->valid & NFS_ATTR_FATTR) == 0)
1532 return 0;
1533
1534 if (nfsi->fileid != fattr->fileid) 892 if (nfsi->fileid != fattr->fileid)
1535 goto out_fileid; 893 goto out_fileid;
1536 894
@@ -1540,6 +898,12 @@ static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr)
1540 if ((inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) 898 if ((inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT))
1541 goto out_changed; 899 goto out_changed;
1542 900
901 server = NFS_SERVER(inode);
902 /* Update the fsid if and only if this is the root directory */
903 if (inode == inode->i_sb->s_root->d_inode
904 && !nfs_fsid_equal(&server->fsid, &fattr->fsid))
905 server->fsid = fattr->fsid;
906
1543 /* 907 /*
1544 * Update the read time so we don't revalidate too often. 908 * Update the read time so we don't revalidate too often.
1545 */ 909 */
@@ -1549,7 +913,7 @@ static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr)
1549 /* Are we racing with known updates of the metadata on the server? */ 913 /* Are we racing with known updates of the metadata on the server? */
1550 data_stable = nfs_verify_change_attribute(inode, fattr->time_start); 914 data_stable = nfs_verify_change_attribute(inode, fattr->time_start);
1551 if (data_stable) 915 if (data_stable)
1552 nfsi->cache_validity &= ~(NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ATIME); 916 nfsi->cache_validity &= ~(NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_ATIME);
1553 917
1554 /* Do atomic weak cache consistency updates */ 918 /* Do atomic weak cache consistency updates */
1555 nfs_wcc_update_inode(inode, fattr); 919 nfs_wcc_update_inode(inode, fattr);
@@ -1613,15 +977,13 @@ static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr)
1613 inode->i_blksize = fattr->du.nfs2.blocksize; 977 inode->i_blksize = fattr->du.nfs2.blocksize;
1614 } 978 }
1615 979
1616 if ((fattr->valid & NFS_ATTR_FATTR_V4)) { 980 if ((fattr->valid & NFS_ATTR_FATTR_V4) != 0 &&
1617 if (nfsi->change_attr != fattr->change_attr) { 981 nfsi->change_attr != fattr->change_attr) {
1618 dprintk("NFS: change_attr change on server for file %s/%ld\n", 982 dprintk("NFS: change_attr change on server for file %s/%ld\n",
1619 inode->i_sb->s_id, inode->i_ino); 983 inode->i_sb->s_id, inode->i_ino);
1620 nfsi->change_attr = fattr->change_attr; 984 nfsi->change_attr = fattr->change_attr;
1621 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; 985 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
1622 nfsi->cache_change_attribute = jiffies; 986 nfsi->cache_change_attribute = jiffies;
1623 } else
1624 invalid &= ~(NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA);
1625 } 987 }
1626 988
1627 /* Update attrtimeo value if we're out of the unstable period */ 989 /* Update attrtimeo value if we're out of the unstable period */
@@ -1669,202 +1031,15 @@ static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr)
1669 goto out_err; 1031 goto out_err;
1670} 1032}
1671 1033
1672/*
1673 * File system information
1674 */
1675
1676static int nfs_set_super(struct super_block *s, void *data)
1677{
1678 s->s_fs_info = data;
1679 return set_anon_super(s, data);
1680}
1681
1682static int nfs_compare_super(struct super_block *sb, void *data)
1683{
1684 struct nfs_server *server = data;
1685 struct nfs_server *old = NFS_SB(sb);
1686
1687 if (old->addr.sin_addr.s_addr != server->addr.sin_addr.s_addr)
1688 return 0;
1689 if (old->addr.sin_port != server->addr.sin_port)
1690 return 0;
1691 return !nfs_compare_fh(&old->fh, &server->fh);
1692}
1693
1694static int nfs_get_sb(struct file_system_type *fs_type,
1695 int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt)
1696{
1697 int error;
1698 struct nfs_server *server = NULL;
1699 struct super_block *s;
1700 struct nfs_fh *root;
1701 struct nfs_mount_data *data = raw_data;
1702
1703 error = -EINVAL;
1704 if (data == NULL) {
1705 dprintk("%s: missing data argument\n", __FUNCTION__);
1706 goto out_err_noserver;
1707 }
1708 if (data->version <= 0 || data->version > NFS_MOUNT_VERSION) {
1709 dprintk("%s: bad mount version\n", __FUNCTION__);
1710 goto out_err_noserver;
1711 }
1712 switch (data->version) {
1713 case 1:
1714 data->namlen = 0;
1715 case 2:
1716 data->bsize = 0;
1717 case 3:
1718 if (data->flags & NFS_MOUNT_VER3) {
1719 dprintk("%s: mount structure version %d does not support NFSv3\n",
1720 __FUNCTION__,
1721 data->version);
1722 goto out_err_noserver;
1723 }
1724 data->root.size = NFS2_FHSIZE;
1725 memcpy(data->root.data, data->old_root.data, NFS2_FHSIZE);
1726 case 4:
1727 if (data->flags & NFS_MOUNT_SECFLAVOUR) {
1728 dprintk("%s: mount structure version %d does not support strong security\n",
1729 __FUNCTION__,
1730 data->version);
1731 goto out_err_noserver;
1732 }
1733 case 5:
1734 memset(data->context, 0, sizeof(data->context));
1735 }
1736#ifndef CONFIG_NFS_V3
1737 /* If NFSv3 is not compiled in, return -EPROTONOSUPPORT */
1738 error = -EPROTONOSUPPORT;
1739 if (data->flags & NFS_MOUNT_VER3) {
1740 dprintk("%s: NFSv3 not compiled into kernel\n", __FUNCTION__);
1741 goto out_err_noserver;
1742 }
1743#endif /* CONFIG_NFS_V3 */
1744
1745 error = -ENOMEM;
1746 server = kzalloc(sizeof(struct nfs_server), GFP_KERNEL);
1747 if (!server)
1748 goto out_err_noserver;
1749 /* Zero out the NFS state stuff */
1750 init_nfsv4_state(server);
1751 server->client = server->client_sys = server->client_acl = ERR_PTR(-EINVAL);
1752
1753 root = &server->fh;
1754 if (data->flags & NFS_MOUNT_VER3)
1755 root->size = data->root.size;
1756 else
1757 root->size = NFS2_FHSIZE;
1758 error = -EINVAL;
1759 if (root->size > sizeof(root->data)) {
1760 dprintk("%s: invalid root filehandle\n", __FUNCTION__);
1761 goto out_err;
1762 }
1763 memcpy(root->data, data->root.data, root->size);
1764
1765 /* We now require that the mount process passes the remote address */
1766 memcpy(&server->addr, &data->addr, sizeof(server->addr));
1767 if (server->addr.sin_addr.s_addr == INADDR_ANY) {
1768 dprintk("%s: mount program didn't pass remote address!\n",
1769 __FUNCTION__);
1770 goto out_err;
1771 }
1772
1773 /* Fire up rpciod if not yet running */
1774 error = rpciod_up();
1775 if (error < 0) {
1776 dprintk("%s: couldn't start rpciod! Error = %d\n",
1777 __FUNCTION__, error);
1778 goto out_err;
1779 }
1780
1781 s = sget(fs_type, nfs_compare_super, nfs_set_super, server);
1782 if (IS_ERR(s)) {
1783 error = PTR_ERR(s);
1784 goto out_err_rpciod;
1785 }
1786
1787 if (s->s_root)
1788 goto out_rpciod_down;
1789
1790 s->s_flags = flags;
1791
1792 error = nfs_fill_super(s, data, flags & MS_SILENT ? 1 : 0);
1793 if (error) {
1794 up_write(&s->s_umount);
1795 deactivate_super(s);
1796 return error;
1797 }
1798 s->s_flags |= MS_ACTIVE;
1799 return simple_set_mnt(mnt, s);
1800
1801out_rpciod_down:
1802 rpciod_down();
1803 kfree(server);
1804 return simple_set_mnt(mnt, s);
1805
1806out_err_rpciod:
1807 rpciod_down();
1808out_err:
1809 kfree(server);
1810out_err_noserver:
1811 return error;
1812}
1813
1814static void nfs_kill_super(struct super_block *s)
1815{
1816 struct nfs_server *server = NFS_SB(s);
1817
1818 kill_anon_super(s);
1819
1820 if (!IS_ERR(server->client))
1821 rpc_shutdown_client(server->client);
1822 if (!IS_ERR(server->client_sys))
1823 rpc_shutdown_client(server->client_sys);
1824 if (!IS_ERR(server->client_acl))
1825 rpc_shutdown_client(server->client_acl);
1826
1827 if (!(server->flags & NFS_MOUNT_NONLM))
1828 lockd_down(); /* release rpc.lockd */
1829
1830 rpciod_down(); /* release rpciod */
1831
1832 nfs_free_iostats(server->io_stats);
1833 kfree(server->hostname);
1834 kfree(server);
1835}
1836
1837static struct file_system_type nfs_fs_type = {
1838 .owner = THIS_MODULE,
1839 .name = "nfs",
1840 .get_sb = nfs_get_sb,
1841 .kill_sb = nfs_kill_super,
1842 .fs_flags = FS_ODD_RENAME|FS_REVAL_DOT|FS_BINARY_MOUNTDATA,
1843};
1844 1034
1845#ifdef CONFIG_NFS_V4 1035#ifdef CONFIG_NFS_V4
1846 1036
1847static void nfs4_clear_inode(struct inode *);
1848
1849
1850static struct super_operations nfs4_sops = {
1851 .alloc_inode = nfs_alloc_inode,
1852 .destroy_inode = nfs_destroy_inode,
1853 .write_inode = nfs_write_inode,
1854 .delete_inode = nfs_delete_inode,
1855 .statfs = nfs_statfs,
1856 .clear_inode = nfs4_clear_inode,
1857 .umount_begin = nfs_umount_begin,
1858 .show_options = nfs_show_options,
1859 .show_stats = nfs_show_stats,
1860};
1861
1862/* 1037/*
1863 * Clean out any remaining NFSv4 state that might be left over due 1038 * Clean out any remaining NFSv4 state that might be left over due
1864 * to open() calls that passed nfs_atomic_lookup, but failed to call 1039 * to open() calls that passed nfs_atomic_lookup, but failed to call
1865 * nfs_open(). 1040 * nfs_open().
1866 */ 1041 */
1867static void nfs4_clear_inode(struct inode *inode) 1042void nfs4_clear_inode(struct inode *inode)
1868{ 1043{
1869 struct nfs_inode *nfsi = NFS_I(inode); 1044 struct nfs_inode *nfsi = NFS_I(inode);
1870 1045
@@ -1888,365 +1063,9 @@ static void nfs4_clear_inode(struct inode *inode)
1888 nfs4_close_state(state, state->state); 1063 nfs4_close_state(state, state->state);
1889 } 1064 }
1890} 1065}
1891
1892
1893static int nfs4_fill_super(struct super_block *sb, struct nfs4_mount_data *data, int silent)
1894{
1895 struct nfs_server *server;
1896 struct nfs4_client *clp = NULL;
1897 struct rpc_xprt *xprt = NULL;
1898 struct rpc_clnt *clnt = NULL;
1899 struct rpc_timeout timeparms;
1900 rpc_authflavor_t authflavour;
1901 int err = -EIO;
1902
1903 sb->s_blocksize_bits = 0;
1904 sb->s_blocksize = 0;
1905 server = NFS_SB(sb);
1906 if (data->rsize != 0)
1907 server->rsize = nfs_block_size(data->rsize, NULL);
1908 if (data->wsize != 0)
1909 server->wsize = nfs_block_size(data->wsize, NULL);
1910 server->flags = data->flags & NFS_MOUNT_FLAGMASK;
1911 server->caps = NFS_CAP_ATOMIC_OPEN;
1912
1913 server->acregmin = data->acregmin*HZ;
1914 server->acregmax = data->acregmax*HZ;
1915 server->acdirmin = data->acdirmin*HZ;
1916 server->acdirmax = data->acdirmax*HZ;
1917
1918 server->rpc_ops = &nfs_v4_clientops;
1919
1920 nfs_init_timeout_values(&timeparms, data->proto, data->timeo, data->retrans);
1921
1922 server->retrans_timeo = timeparms.to_initval;
1923 server->retrans_count = timeparms.to_retries;
1924
1925 clp = nfs4_get_client(&server->addr.sin_addr);
1926 if (!clp) {
1927 dprintk("%s: failed to create NFS4 client.\n", __FUNCTION__);
1928 return -EIO;
1929 }
1930
1931 /* Now create transport and client */
1932 authflavour = RPC_AUTH_UNIX;
1933 if (data->auth_flavourlen != 0) {
1934 if (data->auth_flavourlen != 1) {
1935 dprintk("%s: Invalid number of RPC auth flavours %d.\n",
1936 __FUNCTION__, data->auth_flavourlen);
1937 err = -EINVAL;
1938 goto out_fail;
1939 }
1940 if (copy_from_user(&authflavour, data->auth_flavours, sizeof(authflavour))) {
1941 err = -EFAULT;
1942 goto out_fail;
1943 }
1944 }
1945
1946 down_write(&clp->cl_sem);
1947 if (IS_ERR(clp->cl_rpcclient)) {
1948 xprt = xprt_create_proto(data->proto, &server->addr, &timeparms);
1949 if (IS_ERR(xprt)) {
1950 up_write(&clp->cl_sem);
1951 err = PTR_ERR(xprt);
1952 dprintk("%s: cannot create RPC transport. Error = %d\n",
1953 __FUNCTION__, err);
1954 goto out_fail;
1955 }
1956 clnt = rpc_create_client(xprt, server->hostname, &nfs_program,
1957 server->rpc_ops->version, authflavour);
1958 if (IS_ERR(clnt)) {
1959 up_write(&clp->cl_sem);
1960 err = PTR_ERR(clnt);
1961 dprintk("%s: cannot create RPC client. Error = %d\n",
1962 __FUNCTION__, err);
1963 goto out_fail;
1964 }
1965 clnt->cl_intr = 1;
1966 clnt->cl_softrtry = 1;
1967 clp->cl_rpcclient = clnt;
1968 memcpy(clp->cl_ipaddr, server->ip_addr, sizeof(clp->cl_ipaddr));
1969 nfs_idmap_new(clp);
1970 }
1971 list_add_tail(&server->nfs4_siblings, &clp->cl_superblocks);
1972 clnt = rpc_clone_client(clp->cl_rpcclient);
1973 if (!IS_ERR(clnt))
1974 server->nfs4_state = clp;
1975 up_write(&clp->cl_sem);
1976 clp = NULL;
1977
1978 if (IS_ERR(clnt)) {
1979 err = PTR_ERR(clnt);
1980 dprintk("%s: cannot create RPC client. Error = %d\n",
1981 __FUNCTION__, err);
1982 return err;
1983 }
1984
1985 server->client = clnt;
1986
1987 if (server->nfs4_state->cl_idmap == NULL) {
1988 dprintk("%s: failed to create idmapper.\n", __FUNCTION__);
1989 return -ENOMEM;
1990 }
1991
1992 if (clnt->cl_auth->au_flavor != authflavour) {
1993 struct rpc_auth *auth;
1994
1995 auth = rpcauth_create(authflavour, clnt);
1996 if (IS_ERR(auth)) {
1997 dprintk("%s: couldn't create credcache!\n", __FUNCTION__);
1998 return PTR_ERR(auth);
1999 }
2000 }
2001
2002 sb->s_time_gran = 1;
2003
2004 sb->s_op = &nfs4_sops;
2005 err = nfs_sb_init(sb, authflavour);
2006 if (err == 0)
2007 return 0;
2008out_fail:
2009 if (clp)
2010 nfs4_put_client(clp);
2011 return err;
2012}
2013
2014static int nfs4_compare_super(struct super_block *sb, void *data)
2015{
2016 struct nfs_server *server = data;
2017 struct nfs_server *old = NFS_SB(sb);
2018
2019 if (strcmp(server->hostname, old->hostname) != 0)
2020 return 0;
2021 if (strcmp(server->mnt_path, old->mnt_path) != 0)
2022 return 0;
2023 return 1;
2024}
2025
2026static void *
2027nfs_copy_user_string(char *dst, struct nfs_string *src, int maxlen)
2028{
2029 void *p = NULL;
2030
2031 if (!src->len)
2032 return ERR_PTR(-EINVAL);
2033 if (src->len < maxlen)
2034 maxlen = src->len;
2035 if (dst == NULL) {
2036 p = dst = kmalloc(maxlen + 1, GFP_KERNEL);
2037 if (p == NULL)
2038 return ERR_PTR(-ENOMEM);
2039 }
2040 if (copy_from_user(dst, src->data, maxlen)) {
2041 kfree(p);
2042 return ERR_PTR(-EFAULT);
2043 }
2044 dst[maxlen] = '\0';
2045 return dst;
2046}
2047
2048static int nfs4_get_sb(struct file_system_type *fs_type,
2049 int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt)
2050{
2051 int error;
2052 struct nfs_server *server;
2053 struct super_block *s;
2054 struct nfs4_mount_data *data = raw_data;
2055 void *p;
2056
2057 if (data == NULL) {
2058 dprintk("%s: missing data argument\n", __FUNCTION__);
2059 return -EINVAL;
2060 }
2061 if (data->version <= 0 || data->version > NFS4_MOUNT_VERSION) {
2062 dprintk("%s: bad mount version\n", __FUNCTION__);
2063 return -EINVAL;
2064 }
2065
2066 server = kzalloc(sizeof(struct nfs_server), GFP_KERNEL);
2067 if (!server)
2068 return -ENOMEM;
2069 /* Zero out the NFS state stuff */
2070 init_nfsv4_state(server);
2071 server->client = server->client_sys = server->client_acl = ERR_PTR(-EINVAL);
2072
2073 p = nfs_copy_user_string(NULL, &data->hostname, 256);
2074 if (IS_ERR(p))
2075 goto out_err;
2076 server->hostname = p;
2077
2078 p = nfs_copy_user_string(NULL, &data->mnt_path, 1024);
2079 if (IS_ERR(p))
2080 goto out_err;
2081 server->mnt_path = p;
2082
2083 p = nfs_copy_user_string(server->ip_addr, &data->client_addr,
2084 sizeof(server->ip_addr) - 1);
2085 if (IS_ERR(p))
2086 goto out_err;
2087
2088 /* We now require that the mount process passes the remote address */
2089 if (data->host_addrlen != sizeof(server->addr)) {
2090 error = -EINVAL;
2091 goto out_free;
2092 }
2093 if (copy_from_user(&server->addr, data->host_addr, sizeof(server->addr))) {
2094 error = -EFAULT;
2095 goto out_free;
2096 }
2097 if (server->addr.sin_family != AF_INET ||
2098 server->addr.sin_addr.s_addr == INADDR_ANY) {
2099 dprintk("%s: mount program didn't pass remote IP address!\n",
2100 __FUNCTION__);
2101 error = -EINVAL;
2102 goto out_free;
2103 }
2104
2105 /* Fire up rpciod if not yet running */
2106 error = rpciod_up();
2107 if (error < 0) {
2108 dprintk("%s: couldn't start rpciod! Error = %d\n",
2109 __FUNCTION__, error);
2110 goto out_free;
2111 }
2112
2113 s = sget(fs_type, nfs4_compare_super, nfs_set_super, server);
2114 if (IS_ERR(s)) {
2115 error = PTR_ERR(s);
2116 goto out_free;
2117 }
2118
2119 if (s->s_root) {
2120 kfree(server->mnt_path);
2121 kfree(server->hostname);
2122 kfree(server);
2123 return simple_set_mnt(mnt, s);
2124 }
2125
2126 s->s_flags = flags;
2127
2128 error = nfs4_fill_super(s, data, flags & MS_SILENT ? 1 : 0);
2129 if (error) {
2130 up_write(&s->s_umount);
2131 deactivate_super(s);
2132 return error;
2133 }
2134 s->s_flags |= MS_ACTIVE;
2135 return simple_set_mnt(mnt, s);
2136out_err:
2137 error = PTR_ERR(p);
2138out_free:
2139 kfree(server->mnt_path);
2140 kfree(server->hostname);
2141 kfree(server);
2142 return error;
2143}
2144
2145static void nfs4_kill_super(struct super_block *sb)
2146{
2147 struct nfs_server *server = NFS_SB(sb);
2148
2149 nfs_return_all_delegations(sb);
2150 kill_anon_super(sb);
2151
2152 nfs4_renewd_prepare_shutdown(server);
2153
2154 if (server->client != NULL && !IS_ERR(server->client))
2155 rpc_shutdown_client(server->client);
2156
2157 destroy_nfsv4_state(server);
2158
2159 rpciod_down();
2160
2161 nfs_free_iostats(server->io_stats);
2162 kfree(server->hostname);
2163 kfree(server);
2164}
2165
2166static struct file_system_type nfs4_fs_type = {
2167 .owner = THIS_MODULE,
2168 .name = "nfs4",
2169 .get_sb = nfs4_get_sb,
2170 .kill_sb = nfs4_kill_super,
2171 .fs_flags = FS_ODD_RENAME|FS_REVAL_DOT|FS_BINARY_MOUNTDATA,
2172};
2173
2174static const int nfs_set_port_min = 0;
2175static const int nfs_set_port_max = 65535;
2176static int param_set_port(const char *val, struct kernel_param *kp)
2177{
2178 char *endp;
2179 int num = simple_strtol(val, &endp, 0);
2180 if (endp == val || *endp || num < nfs_set_port_min || num > nfs_set_port_max)
2181 return -EINVAL;
2182 *((int *)kp->arg) = num;
2183 return 0;
2184}
2185
2186module_param_call(callback_tcpport, param_set_port, param_get_int,
2187 &nfs_callback_set_tcpport, 0644);
2188
2189static int param_set_idmap_timeout(const char *val, struct kernel_param *kp)
2190{
2191 char *endp;
2192 int num = simple_strtol(val, &endp, 0);
2193 int jif = num * HZ;
2194 if (endp == val || *endp || num < 0 || jif < num)
2195 return -EINVAL;
2196 *((int *)kp->arg) = jif;
2197 return 0;
2198}
2199
2200module_param_call(idmap_cache_timeout, param_set_idmap_timeout, param_get_int,
2201 &nfs_idmap_cache_timeout, 0644);
2202
2203#define nfs4_init_once(nfsi) \
2204 do { \
2205 INIT_LIST_HEAD(&(nfsi)->open_states); \
2206 nfsi->delegation = NULL; \
2207 nfsi->delegation_state = 0; \
2208 init_rwsem(&nfsi->rwsem); \
2209 } while(0)
2210
2211static inline int register_nfs4fs(void)
2212{
2213 int ret;
2214
2215 ret = nfs_register_sysctl();
2216 if (ret != 0)
2217 return ret;
2218 ret = register_filesystem(&nfs4_fs_type);
2219 if (ret != 0)
2220 nfs_unregister_sysctl();
2221 return ret;
2222}
2223
2224static inline void unregister_nfs4fs(void)
2225{
2226 unregister_filesystem(&nfs4_fs_type);
2227 nfs_unregister_sysctl();
2228}
2229#else
2230#define nfs4_init_once(nfsi) \
2231 do { } while (0)
2232#define register_nfs4fs() (0)
2233#define unregister_nfs4fs()
2234#endif 1066#endif
2235 1067
2236extern int nfs_init_nfspagecache(void); 1068struct inode *nfs_alloc_inode(struct super_block *sb)
2237extern void nfs_destroy_nfspagecache(void);
2238extern int nfs_init_readpagecache(void);
2239extern void nfs_destroy_readpagecache(void);
2240extern int nfs_init_writepagecache(void);
2241extern void nfs_destroy_writepagecache(void);
2242#ifdef CONFIG_NFS_DIRECTIO
2243extern int nfs_init_directcache(void);
2244extern void nfs_destroy_directcache(void);
2245#endif
2246
2247static kmem_cache_t * nfs_inode_cachep;
2248
2249static struct inode *nfs_alloc_inode(struct super_block *sb)
2250{ 1069{
2251 struct nfs_inode *nfsi; 1070 struct nfs_inode *nfsi;
2252 nfsi = (struct nfs_inode *)kmem_cache_alloc(nfs_inode_cachep, SLAB_KERNEL); 1071 nfsi = (struct nfs_inode *)kmem_cache_alloc(nfs_inode_cachep, SLAB_KERNEL);
@@ -2265,11 +1084,21 @@ static struct inode *nfs_alloc_inode(struct super_block *sb)
2265 return &nfsi->vfs_inode; 1084 return &nfsi->vfs_inode;
2266} 1085}
2267 1086
2268static void nfs_destroy_inode(struct inode *inode) 1087void nfs_destroy_inode(struct inode *inode)
2269{ 1088{
2270 kmem_cache_free(nfs_inode_cachep, NFS_I(inode)); 1089 kmem_cache_free(nfs_inode_cachep, NFS_I(inode));
2271} 1090}
2272 1091
1092static inline void nfs4_init_once(struct nfs_inode *nfsi)
1093{
1094#ifdef CONFIG_NFS_V4
1095 INIT_LIST_HEAD(&nfsi->open_states);
1096 nfsi->delegation = NULL;
1097 nfsi->delegation_state = 0;
1098 init_rwsem(&nfsi->rwsem);
1099#endif
1100}
1101
2273static void init_once(void * foo, kmem_cache_t * cachep, unsigned long flags) 1102static void init_once(void * foo, kmem_cache_t * cachep, unsigned long flags)
2274{ 1103{
2275 struct nfs_inode *nfsi = (struct nfs_inode *) foo; 1104 struct nfs_inode *nfsi = (struct nfs_inode *) foo;
@@ -2290,7 +1119,7 @@ static void init_once(void * foo, kmem_cache_t * cachep, unsigned long flags)
2290 } 1119 }
2291} 1120}
2292 1121
2293static int nfs_init_inodecache(void) 1122static int __init nfs_init_inodecache(void)
2294{ 1123{
2295 nfs_inode_cachep = kmem_cache_create("nfs_inode_cache", 1124 nfs_inode_cachep = kmem_cache_create("nfs_inode_cache",
2296 sizeof(struct nfs_inode), 1125 sizeof(struct nfs_inode),
@@ -2303,7 +1132,7 @@ static int nfs_init_inodecache(void)
2303 return 0; 1132 return 0;
2304} 1133}
2305 1134
2306static void nfs_destroy_inodecache(void) 1135static void __exit nfs_destroy_inodecache(void)
2307{ 1136{
2308 if (kmem_cache_destroy(nfs_inode_cachep)) 1137 if (kmem_cache_destroy(nfs_inode_cachep))
2309 printk(KERN_INFO "nfs_inode_cache: not all structures were freed\n"); 1138 printk(KERN_INFO "nfs_inode_cache: not all structures were freed\n");
@@ -2332,29 +1161,22 @@ static int __init init_nfs_fs(void)
2332 if (err) 1161 if (err)
2333 goto out1; 1162 goto out1;
2334 1163
2335#ifdef CONFIG_NFS_DIRECTIO
2336 err = nfs_init_directcache(); 1164 err = nfs_init_directcache();
2337 if (err) 1165 if (err)
2338 goto out0; 1166 goto out0;
2339#endif
2340 1167
2341#ifdef CONFIG_PROC_FS 1168#ifdef CONFIG_PROC_FS
2342 rpc_proc_register(&nfs_rpcstat); 1169 rpc_proc_register(&nfs_rpcstat);
2343#endif 1170#endif
2344 err = register_filesystem(&nfs_fs_type); 1171 if ((err = register_nfs_fs()) != 0)
2345 if (err)
2346 goto out;
2347 if ((err = register_nfs4fs()) != 0)
2348 goto out; 1172 goto out;
2349 return 0; 1173 return 0;
2350out: 1174out:
2351#ifdef CONFIG_PROC_FS 1175#ifdef CONFIG_PROC_FS
2352 rpc_proc_unregister("nfs"); 1176 rpc_proc_unregister("nfs");
2353#endif 1177#endif
2354#ifdef CONFIG_NFS_DIRECTIO
2355 nfs_destroy_directcache(); 1178 nfs_destroy_directcache();
2356out0: 1179out0:
2357#endif
2358 nfs_destroy_writepagecache(); 1180 nfs_destroy_writepagecache();
2359out1: 1181out1:
2360 nfs_destroy_readpagecache(); 1182 nfs_destroy_readpagecache();
@@ -2368,9 +1190,7 @@ out4:
2368 1190
2369static void __exit exit_nfs_fs(void) 1191static void __exit exit_nfs_fs(void)
2370{ 1192{
2371#ifdef CONFIG_NFS_DIRECTIO
2372 nfs_destroy_directcache(); 1193 nfs_destroy_directcache();
2373#endif
2374 nfs_destroy_writepagecache(); 1194 nfs_destroy_writepagecache();
2375 nfs_destroy_readpagecache(); 1195 nfs_destroy_readpagecache();
2376 nfs_destroy_inodecache(); 1196 nfs_destroy_inodecache();
@@ -2378,8 +1198,7 @@ static void __exit exit_nfs_fs(void)
2378#ifdef CONFIG_PROC_FS 1198#ifdef CONFIG_PROC_FS
2379 rpc_proc_unregister("nfs"); 1199 rpc_proc_unregister("nfs");
2380#endif 1200#endif
2381 unregister_filesystem(&nfs_fs_type); 1201 unregister_nfs_fs();
2382 unregister_nfs4fs();
2383} 1202}
2384 1203
2385/* Not quite true; I just maintain it */ 1204/* Not quite true; I just maintain it */
diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h
new file mode 100644
index 000000000000..bd2815e2dec1
--- /dev/null
+++ b/fs/nfs/internal.h
@@ -0,0 +1,186 @@
1/*
2 * NFS internal definitions
3 */
4
5#include <linux/mount.h>
6
7struct nfs_clone_mount {
8 const struct super_block *sb;
9 const struct dentry *dentry;
10 struct nfs_fh *fh;
11 struct nfs_fattr *fattr;
12 char *hostname;
13 char *mnt_path;
14 struct sockaddr_in *addr;
15 rpc_authflavor_t authflavor;
16};
17
18/* namespace-nfs4.c */
19#ifdef CONFIG_NFS_V4
20extern struct vfsmount *nfs_do_refmount(const struct vfsmount *mnt_parent, struct dentry *dentry);
21#else
22static inline
23struct vfsmount *nfs_do_refmount(const struct vfsmount *mnt_parent, struct dentry *dentry)
24{
25 return ERR_PTR(-ENOENT);
26}
27#endif
28
29/* callback_xdr.c */
30extern struct svc_version nfs4_callback_version1;
31
32/* pagelist.c */
33extern int __init nfs_init_nfspagecache(void);
34extern void __exit nfs_destroy_nfspagecache(void);
35extern int __init nfs_init_readpagecache(void);
36extern void __exit nfs_destroy_readpagecache(void);
37extern int __init nfs_init_writepagecache(void);
38extern void __exit nfs_destroy_writepagecache(void);
39
40#ifdef CONFIG_NFS_DIRECTIO
41extern int __init nfs_init_directcache(void);
42extern void __exit nfs_destroy_directcache(void);
43#else
44#define nfs_init_directcache() (0)
45#define nfs_destroy_directcache() do {} while(0)
46#endif
47
48/* nfs2xdr.c */
49extern struct rpc_procinfo nfs_procedures[];
50extern u32 * nfs_decode_dirent(u32 *, struct nfs_entry *, int);
51
52/* nfs3xdr.c */
53extern struct rpc_procinfo nfs3_procedures[];
54extern u32 *nfs3_decode_dirent(u32 *, struct nfs_entry *, int);
55
56/* nfs4xdr.c */
57extern int nfs_stat_to_errno(int);
58extern u32 *nfs4_decode_dirent(u32 *p, struct nfs_entry *entry, int plus);
59
60/* nfs4proc.c */
61#ifdef CONFIG_NFS_V4
62extern struct rpc_procinfo nfs4_procedures[];
63
64extern int nfs4_proc_fs_locations(struct inode *dir, struct dentry *dentry,
65 struct nfs4_fs_locations *fs_locations,
66 struct page *page);
67#endif
68
69/* inode.c */
70extern struct inode *nfs_alloc_inode(struct super_block *sb);
71extern void nfs_destroy_inode(struct inode *);
72extern int nfs_write_inode(struct inode *,int);
73extern void nfs_clear_inode(struct inode *);
74#ifdef CONFIG_NFS_V4
75extern void nfs4_clear_inode(struct inode *);
76#endif
77
78/* super.c */
79extern struct file_system_type nfs_referral_nfs4_fs_type;
80extern struct file_system_type clone_nfs_fs_type;
81#ifdef CONFIG_NFS_V4
82extern struct file_system_type clone_nfs4_fs_type;
83#endif
84#ifdef CONFIG_PROC_FS
85extern struct rpc_stat nfs_rpcstat;
86#endif
87extern int __init register_nfs_fs(void);
88extern void __exit unregister_nfs_fs(void);
89
90/* namespace.c */
91extern char *nfs_path(const char *base, const struct dentry *dentry,
92 char *buffer, ssize_t buflen);
93
94/*
95 * Determine the mount path as a string
96 */
97static inline char *
98nfs4_path(const struct dentry *dentry, char *buffer, ssize_t buflen)
99{
100#ifdef CONFIG_NFS_V4
101 return nfs_path(NFS_SB(dentry->d_sb)->mnt_path, dentry, buffer, buflen);
102#else
103 return NULL;
104#endif
105}
106
107/*
108 * Determine the device name as a string
109 */
110static inline char *nfs_devname(const struct vfsmount *mnt_parent,
111 const struct dentry *dentry,
112 char *buffer, ssize_t buflen)
113{
114 return nfs_path(mnt_parent->mnt_devname, dentry, buffer, buflen);
115}
116
117/*
118 * Determine the actual block size (and log2 thereof)
119 */
120static inline
121unsigned long nfs_block_bits(unsigned long bsize, unsigned char *nrbitsp)
122{
123 /* make sure blocksize is a power of two */
124 if ((bsize & (bsize - 1)) || nrbitsp) {
125 unsigned char nrbits;
126
127 for (nrbits = 31; nrbits && !(bsize & (1 << nrbits)); nrbits--)
128 ;
129 bsize = 1 << nrbits;
130 if (nrbitsp)
131 *nrbitsp = nrbits;
132 }
133
134 return bsize;
135}
136
137/*
138 * Calculate the number of 512byte blocks used.
139 */
140static inline unsigned long nfs_calc_block_size(u64 tsize)
141{
142 loff_t used = (tsize + 511) >> 9;
143 return (used > ULONG_MAX) ? ULONG_MAX : used;
144}
145
146/*
147 * Compute and set NFS server blocksize
148 */
149static inline
150unsigned long nfs_block_size(unsigned long bsize, unsigned char *nrbitsp)
151{
152 if (bsize < NFS_MIN_FILE_IO_SIZE)
153 bsize = NFS_DEF_FILE_IO_SIZE;
154 else if (bsize >= NFS_MAX_FILE_IO_SIZE)
155 bsize = NFS_MAX_FILE_IO_SIZE;
156
157 return nfs_block_bits(bsize, nrbitsp);
158}
159
160/*
161 * Determine the maximum file size for a superblock
162 */
163static inline
164void nfs_super_set_maxbytes(struct super_block *sb, __u64 maxfilesize)
165{
166 sb->s_maxbytes = (loff_t)maxfilesize;
167 if (sb->s_maxbytes > MAX_LFS_FILESIZE || sb->s_maxbytes <= 0)
168 sb->s_maxbytes = MAX_LFS_FILESIZE;
169}
170
171/*
172 * Check if the string represents a "valid" IPv4 address
173 */
174static inline int valid_ipaddr4(const char *buf)
175{
176 int rc, count, in[4];
177
178 rc = sscanf(buf, "%d.%d.%d.%d", &in[0], &in[1], &in[2], &in[3]);
179 if (rc != 4)
180 return -EINVAL;
181 for (count = 0; count < 4; count++) {
182 if (in[count] > 255)
183 return -EINVAL;
184 }
185 return 0;
186}
diff --git a/fs/nfs/namespace.c b/fs/nfs/namespace.c
new file mode 100644
index 000000000000..19b98ca468eb
--- /dev/null
+++ b/fs/nfs/namespace.c
@@ -0,0 +1,229 @@
1/*
2 * linux/fs/nfs/namespace.c
3 *
4 * Copyright (C) 2005 Trond Myklebust <Trond.Myklebust@netapp.com>
5 *
6 * NFS namespace
7 */
8
9#include <linux/config.h>
10
11#include <linux/dcache.h>
12#include <linux/mount.h>
13#include <linux/namei.h>
14#include <linux/nfs_fs.h>
15#include <linux/string.h>
16#include <linux/sunrpc/clnt.h>
17#include <linux/vfs.h>
18#include "internal.h"
19
20#define NFSDBG_FACILITY NFSDBG_VFS
21
22static void nfs_expire_automounts(void *list);
23
24LIST_HEAD(nfs_automount_list);
25static DECLARE_WORK(nfs_automount_task, nfs_expire_automounts, &nfs_automount_list);
26int nfs_mountpoint_expiry_timeout = 500 * HZ;
27
28/*
29 * nfs_path - reconstruct the path given an arbitrary dentry
30 * @base - arbitrary string to prepend to the path
31 * @dentry - pointer to dentry
32 * @buffer - result buffer
33 * @buflen - length of buffer
34 *
35 * Helper function for constructing the path from the
36 * root dentry to an arbitrary hashed dentry.
37 *
38 * This is mainly for use in figuring out the path on the
39 * server side when automounting on top of an existing partition.
40 */
41char *nfs_path(const char *base, const struct dentry *dentry,
42 char *buffer, ssize_t buflen)
43{
44 char *end = buffer+buflen;
45 int namelen;
46
47 *--end = '\0';
48 buflen--;
49 spin_lock(&dcache_lock);
50 while (!IS_ROOT(dentry)) {
51 namelen = dentry->d_name.len;
52 buflen -= namelen + 1;
53 if (buflen < 0)
54 goto Elong;
55 end -= namelen;
56 memcpy(end, dentry->d_name.name, namelen);
57 *--end = '/';
58 dentry = dentry->d_parent;
59 }
60 spin_unlock(&dcache_lock);
61 namelen = strlen(base);
62 /* Strip off excess slashes in base string */
63 while (namelen > 0 && base[namelen - 1] == '/')
64 namelen--;
65 buflen -= namelen;
66 if (buflen < 0)
67 goto Elong;
68 end -= namelen;
69 memcpy(end, base, namelen);
70 return end;
71Elong:
72 return ERR_PTR(-ENAMETOOLONG);
73}
74
75/*
76 * nfs_follow_mountpoint - handle crossing a mountpoint on the server
77 * @dentry - dentry of mountpoint
78 * @nd - nameidata info
79 *
80 * When we encounter a mountpoint on the server, we want to set up
81 * a mountpoint on the client too, to prevent inode numbers from
82 * colliding, and to allow "df" to work properly.
83 * On NFSv4, we also want to allow for the fact that different
84 * filesystems may be migrated to different servers in a failover
85 * situation, and that different filesystems may want to use
86 * different security flavours.
87 */
88static void * nfs_follow_mountpoint(struct dentry *dentry, struct nameidata *nd)
89{
90 struct vfsmount *mnt;
91 struct nfs_server *server = NFS_SERVER(dentry->d_inode);
92 struct dentry *parent;
93 struct nfs_fh fh;
94 struct nfs_fattr fattr;
95 int err;
96
97 BUG_ON(IS_ROOT(dentry));
98 dprintk("%s: enter\n", __FUNCTION__);
99 dput(nd->dentry);
100 nd->dentry = dget(dentry);
101 if (d_mountpoint(nd->dentry))
102 goto out_follow;
103 /* Look it up again */
104 parent = dget_parent(nd->dentry);
105 err = server->rpc_ops->lookup(parent->d_inode, &nd->dentry->d_name, &fh, &fattr);
106 dput(parent);
107 if (err != 0)
108 goto out_err;
109
110 if (fattr.valid & NFS_ATTR_FATTR_V4_REFERRAL)
111 mnt = nfs_do_refmount(nd->mnt, nd->dentry);
112 else
113 mnt = nfs_do_submount(nd->mnt, nd->dentry, &fh, &fattr);
114 err = PTR_ERR(mnt);
115 if (IS_ERR(mnt))
116 goto out_err;
117
118 mntget(mnt);
119 err = do_add_mount(mnt, nd, nd->mnt->mnt_flags|MNT_SHRINKABLE, &nfs_automount_list);
120 if (err < 0) {
121 mntput(mnt);
122 if (err == -EBUSY)
123 goto out_follow;
124 goto out_err;
125 }
126 mntput(nd->mnt);
127 dput(nd->dentry);
128 nd->mnt = mnt;
129 nd->dentry = dget(mnt->mnt_root);
130 schedule_delayed_work(&nfs_automount_task, nfs_mountpoint_expiry_timeout);
131out:
132 dprintk("%s: done, returned %d\n", __FUNCTION__, err);
133 return ERR_PTR(err);
134out_err:
135 path_release(nd);
136 goto out;
137out_follow:
138 while(d_mountpoint(nd->dentry) && follow_down(&nd->mnt, &nd->dentry))
139 ;
140 err = 0;
141 goto out;
142}
143
144struct inode_operations nfs_mountpoint_inode_operations = {
145 .follow_link = nfs_follow_mountpoint,
146 .getattr = nfs_getattr,
147};
148
149struct inode_operations nfs_referral_inode_operations = {
150 .follow_link = nfs_follow_mountpoint,
151};
152
153static void nfs_expire_automounts(void *data)
154{
155 struct list_head *list = (struct list_head *)data;
156
157 mark_mounts_for_expiry(list);
158 if (!list_empty(list))
159 schedule_delayed_work(&nfs_automount_task, nfs_mountpoint_expiry_timeout);
160}
161
162void nfs_release_automount_timer(void)
163{
164 if (list_empty(&nfs_automount_list)) {
165 cancel_delayed_work(&nfs_automount_task);
166 flush_scheduled_work();
167 }
168}
169
170/*
171 * Clone a mountpoint of the appropriate type
172 */
173static struct vfsmount *nfs_do_clone_mount(struct nfs_server *server, char *devname,
174 struct nfs_clone_mount *mountdata)
175{
176#ifdef CONFIG_NFS_V4
177 struct vfsmount *mnt = NULL;
178 switch (server->rpc_ops->version) {
179 case 2:
180 case 3:
181 mnt = vfs_kern_mount(&clone_nfs_fs_type, 0, devname, mountdata);
182 break;
183 case 4:
184 mnt = vfs_kern_mount(&clone_nfs4_fs_type, 0, devname, mountdata);
185 }
186 return mnt;
187#else
188 return vfs_kern_mount(&clone_nfs_fs_type, 0, devname, mountdata);
189#endif
190}
191
192/**
193 * nfs_do_submount - set up mountpoint when crossing a filesystem boundary
194 * @mnt_parent - mountpoint of parent directory
195 * @dentry - parent directory
196 * @fh - filehandle for new root dentry
197 * @fattr - attributes for new root inode
198 *
199 */
200struct vfsmount *nfs_do_submount(const struct vfsmount *mnt_parent,
201 const struct dentry *dentry, struct nfs_fh *fh,
202 struct nfs_fattr *fattr)
203{
204 struct nfs_clone_mount mountdata = {
205 .sb = mnt_parent->mnt_sb,
206 .dentry = dentry,
207 .fh = fh,
208 .fattr = fattr,
209 };
210 struct vfsmount *mnt = ERR_PTR(-ENOMEM);
211 char *page = (char *) __get_free_page(GFP_USER);
212 char *devname;
213
214 dprintk("%s: submounting on %s/%s\n", __FUNCTION__,
215 dentry->d_parent->d_name.name,
216 dentry->d_name.name);
217 if (page == NULL)
218 goto out;
219 devname = nfs_devname(mnt_parent, dentry, page, PAGE_SIZE);
220 mnt = (struct vfsmount *)devname;
221 if (IS_ERR(devname))
222 goto free_page;
223 mnt = nfs_do_clone_mount(NFS_SB(mnt_parent->mnt_sb), devname, &mountdata);
224free_page:
225 free_page((unsigned long)page);
226out:
227 dprintk("%s: done\n", __FUNCTION__);
228 return mnt;
229}
diff --git a/fs/nfs/nfs2xdr.c b/fs/nfs/nfs2xdr.c
index f0015fa876e1..3b939e055a08 100644
--- a/fs/nfs/nfs2xdr.c
+++ b/fs/nfs/nfs2xdr.c
@@ -23,12 +23,13 @@
23#include <linux/nfs.h> 23#include <linux/nfs.h>
24#include <linux/nfs2.h> 24#include <linux/nfs2.h>
25#include <linux/nfs_fs.h> 25#include <linux/nfs_fs.h>
26#include "internal.h"
27
28#include "internal.h"
26 29
27#define NFSDBG_FACILITY NFSDBG_XDR 30#define NFSDBG_FACILITY NFSDBG_XDR
28/* #define NFS_PARANOIA 1 */ 31/* #define NFS_PARANOIA 1 */
29 32
30extern int nfs_stat_to_errno(int stat);
31
32/* Mapping from NFS error code to "errno" error code. */ 33/* Mapping from NFS error code to "errno" error code. */
33#define errno_NFSERR_IO EIO 34#define errno_NFSERR_IO EIO
34 35
@@ -131,7 +132,8 @@ xdr_decode_fattr(u32 *p, struct nfs_fattr *fattr)
131 fattr->du.nfs2.blocksize = ntohl(*p++); 132 fattr->du.nfs2.blocksize = ntohl(*p++);
132 rdev = ntohl(*p++); 133 rdev = ntohl(*p++);
133 fattr->du.nfs2.blocks = ntohl(*p++); 134 fattr->du.nfs2.blocks = ntohl(*p++);
134 fattr->fsid_u.nfs3 = ntohl(*p++); 135 fattr->fsid.major = ntohl(*p++);
136 fattr->fsid.minor = 0;
135 fattr->fileid = ntohl(*p++); 137 fattr->fileid = ntohl(*p++);
136 p = xdr_decode_time(p, &fattr->atime); 138 p = xdr_decode_time(p, &fattr->atime);
137 p = xdr_decode_time(p, &fattr->mtime); 139 p = xdr_decode_time(p, &fattr->mtime);
diff --git a/fs/nfs/nfs3acl.c b/fs/nfs/nfs3acl.c
index 33287879bd23..7322da4d2055 100644
--- a/fs/nfs/nfs3acl.c
+++ b/fs/nfs/nfs3acl.c
@@ -172,8 +172,10 @@ static void nfs3_cache_acls(struct inode *inode, struct posix_acl *acl,
172 inode->i_ino, acl, dfacl); 172 inode->i_ino, acl, dfacl);
173 spin_lock(&inode->i_lock); 173 spin_lock(&inode->i_lock);
174 __nfs3_forget_cached_acls(NFS_I(inode)); 174 __nfs3_forget_cached_acls(NFS_I(inode));
175 nfsi->acl_access = posix_acl_dup(acl); 175 if (!IS_ERR(acl))
176 nfsi->acl_default = posix_acl_dup(dfacl); 176 nfsi->acl_access = posix_acl_dup(acl);
177 if (!IS_ERR(dfacl))
178 nfsi->acl_default = posix_acl_dup(dfacl);
177 spin_unlock(&inode->i_lock); 179 spin_unlock(&inode->i_lock);
178} 180}
179 181
@@ -254,7 +256,9 @@ struct posix_acl *nfs3_proc_getacl(struct inode *inode, int type)
254 res.acl_access = NULL; 256 res.acl_access = NULL;
255 } 257 }
256 } 258 }
257 nfs3_cache_acls(inode, res.acl_access, res.acl_default); 259 nfs3_cache_acls(inode,
260 (res.mask & NFS_ACL) ? res.acl_access : ERR_PTR(-EINVAL),
261 (res.mask & NFS_DFACL) ? res.acl_default : ERR_PTR(-EINVAL));
258 262
259 switch(type) { 263 switch(type) {
260 case ACL_TYPE_ACCESS: 264 case ACL_TYPE_ACCESS:
@@ -329,6 +333,7 @@ static int nfs3_proc_setacls(struct inode *inode, struct posix_acl *acl,
329 switch (status) { 333 switch (status) {
330 case 0: 334 case 0:
331 status = nfs_refresh_inode(inode, &fattr); 335 status = nfs_refresh_inode(inode, &fattr);
336 nfs3_cache_acls(inode, acl, dfacl);
332 break; 337 break;
333 case -EPFNOSUPPORT: 338 case -EPFNOSUPPORT:
334 case -EPROTONOSUPPORT: 339 case -EPROTONOSUPPORT:
diff --git a/fs/nfs/nfs3proc.c b/fs/nfs/nfs3proc.c
index cf186f0d2b3b..7143b1f82cea 100644
--- a/fs/nfs/nfs3proc.c
+++ b/fs/nfs/nfs3proc.c
@@ -20,11 +20,10 @@
20#include <linux/nfs_mount.h> 20#include <linux/nfs_mount.h>
21 21
22#include "iostat.h" 22#include "iostat.h"
23#include "internal.h"
23 24
24#define NFSDBG_FACILITY NFSDBG_PROC 25#define NFSDBG_FACILITY NFSDBG_PROC
25 26
26extern struct rpc_procinfo nfs3_procedures[];
27
28/* A wrapper to handle the EJUKEBOX error message */ 27/* A wrapper to handle the EJUKEBOX error message */
29static int 28static int
30nfs3_rpc_wrapper(struct rpc_clnt *clnt, struct rpc_message *msg, int flags) 29nfs3_rpc_wrapper(struct rpc_clnt *clnt, struct rpc_message *msg, int flags)
@@ -809,8 +808,6 @@ nfs3_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
809 return status; 808 return status;
810} 809}
811 810
812extern u32 *nfs3_decode_dirent(u32 *, struct nfs_entry *, int);
813
814static int nfs3_read_done(struct rpc_task *task, struct nfs_read_data *data) 811static int nfs3_read_done(struct rpc_task *task, struct nfs_read_data *data)
815{ 812{
816 if (nfs3_async_handle_jukebox(task, data->inode)) 813 if (nfs3_async_handle_jukebox(task, data->inode))
diff --git a/fs/nfs/nfs3xdr.c b/fs/nfs/nfs3xdr.c
index ec233619687e..0250269e9753 100644
--- a/fs/nfs/nfs3xdr.c
+++ b/fs/nfs/nfs3xdr.c
@@ -22,14 +22,13 @@
22#include <linux/nfs3.h> 22#include <linux/nfs3.h>
23#include <linux/nfs_fs.h> 23#include <linux/nfs_fs.h>
24#include <linux/nfsacl.h> 24#include <linux/nfsacl.h>
25#include "internal.h"
25 26
26#define NFSDBG_FACILITY NFSDBG_XDR 27#define NFSDBG_FACILITY NFSDBG_XDR
27 28
28/* Mapping from NFS error code to "errno" error code. */ 29/* Mapping from NFS error code to "errno" error code. */
29#define errno_NFSERR_IO EIO 30#define errno_NFSERR_IO EIO
30 31
31extern int nfs_stat_to_errno(int);
32
33/* 32/*
34 * Declare the space requirements for NFS arguments and replies as 33 * Declare the space requirements for NFS arguments and replies as
35 * number of 32bit-words 34 * number of 32bit-words
@@ -166,7 +165,8 @@ xdr_decode_fattr(u32 *p, struct nfs_fattr *fattr)
166 if (MAJOR(fattr->rdev) != major || MINOR(fattr->rdev) != minor) 165 if (MAJOR(fattr->rdev) != major || MINOR(fattr->rdev) != minor)
167 fattr->rdev = 0; 166 fattr->rdev = 0;
168 167
169 p = xdr_decode_hyper(p, &fattr->fsid_u.nfs3); 168 p = xdr_decode_hyper(p, &fattr->fsid.major);
169 fattr->fsid.minor = 0;
170 p = xdr_decode_hyper(p, &fattr->fileid); 170 p = xdr_decode_hyper(p, &fattr->fileid);
171 p = xdr_decode_time3(p, &fattr->atime); 171 p = xdr_decode_time3(p, &fattr->atime);
172 p = xdr_decode_time3(p, &fattr->mtime); 172 p = xdr_decode_time3(p, &fattr->mtime);
diff --git a/fs/nfs/nfs4_fs.h b/fs/nfs/nfs4_fs.h
index 0f5e4e7cddec..9a102860df37 100644
--- a/fs/nfs/nfs4_fs.h
+++ b/fs/nfs/nfs4_fs.h
@@ -217,6 +217,9 @@ extern int nfs4_proc_renew(struct nfs4_client *, struct rpc_cred *);
217extern int nfs4_do_close(struct inode *inode, struct nfs4_state *state); 217extern int nfs4_do_close(struct inode *inode, struct nfs4_state *state);
218extern struct dentry *nfs4_atomic_open(struct inode *, struct dentry *, struct nameidata *); 218extern struct dentry *nfs4_atomic_open(struct inode *, struct dentry *, struct nameidata *);
219extern int nfs4_open_revalidate(struct inode *, struct dentry *, int, struct nameidata *); 219extern int nfs4_open_revalidate(struct inode *, struct dentry *, int, struct nameidata *);
220extern int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle);
221extern int nfs4_proc_fs_locations(struct inode *dir, struct dentry *dentry,
222 struct nfs4_fs_locations *fs_locations, struct page *page);
220 223
221extern struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops; 224extern struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops;
222extern struct nfs4_state_recovery_ops nfs4_network_partition_recovery_ops; 225extern struct nfs4_state_recovery_ops nfs4_network_partition_recovery_ops;
@@ -225,6 +228,7 @@ extern const u32 nfs4_fattr_bitmap[2];
225extern const u32 nfs4_statfs_bitmap[2]; 228extern const u32 nfs4_statfs_bitmap[2];
226extern const u32 nfs4_pathconf_bitmap[2]; 229extern const u32 nfs4_pathconf_bitmap[2];
227extern const u32 nfs4_fsinfo_bitmap[2]; 230extern const u32 nfs4_fsinfo_bitmap[2];
231extern const u32 nfs4_fs_locations_bitmap[2];
228 232
229/* nfs4renewd.c */ 233/* nfs4renewd.c */
230extern void nfs4_schedule_state_renewal(struct nfs4_client *); 234extern void nfs4_schedule_state_renewal(struct nfs4_client *);
diff --git a/fs/nfs/nfs4namespace.c b/fs/nfs/nfs4namespace.c
new file mode 100644
index 000000000000..ea38d27b74e6
--- /dev/null
+++ b/fs/nfs/nfs4namespace.c
@@ -0,0 +1,201 @@
1/*
2 * linux/fs/nfs/nfs4namespace.c
3 *
4 * Copyright (C) 2005 Trond Myklebust <Trond.Myklebust@netapp.com>
5 *
6 * NFSv4 namespace
7 */
8
9#include <linux/config.h>
10
11#include <linux/dcache.h>
12#include <linux/mount.h>
13#include <linux/namei.h>
14#include <linux/nfs_fs.h>
15#include <linux/string.h>
16#include <linux/sunrpc/clnt.h>
17#include <linux/vfs.h>
18#include <linux/inet.h>
19#include "internal.h"
20
21#define NFSDBG_FACILITY NFSDBG_VFS
22
23/*
24 * Check if fs_root is valid
25 */
26static inline char *nfs4_pathname_string(struct nfs4_pathname *pathname,
27 char *buffer, ssize_t buflen)
28{
29 char *end = buffer + buflen;
30 int n;
31
32 *--end = '\0';
33 buflen--;
34
35 n = pathname->ncomponents;
36 while (--n >= 0) {
37 struct nfs4_string *component = &pathname->components[n];
38 buflen -= component->len + 1;
39 if (buflen < 0)
40 goto Elong;
41 end -= component->len;
42 memcpy(end, component->data, component->len);
43 *--end = '/';
44 }
45 return end;
46Elong:
47 return ERR_PTR(-ENAMETOOLONG);
48}
49
50
51/**
52 * nfs_follow_referral - set up mountpoint when hitting a referral on moved error
53 * @mnt_parent - mountpoint of parent directory
54 * @dentry - parent directory
55 * @fspath - fs path returned in fs_locations
56 * @mntpath - mount path to new server
57 * @hostname - hostname of new server
58 * @addr - host addr of new server
59 *
60 */
61static struct vfsmount *nfs_follow_referral(const struct vfsmount *mnt_parent,
62 const struct dentry *dentry,
63 struct nfs4_fs_locations *locations)
64{
65 struct vfsmount *mnt = ERR_PTR(-ENOENT);
66 struct nfs_clone_mount mountdata = {
67 .sb = mnt_parent->mnt_sb,
68 .dentry = dentry,
69 .authflavor = NFS_SB(mnt_parent->mnt_sb)->client->cl_auth->au_flavor,
70 };
71 char *page, *page2;
72 char *path, *fs_path;
73 char *devname;
74 int loc, s;
75
76 if (locations == NULL || locations->nlocations <= 0)
77 goto out;
78
79 dprintk("%s: referral at %s/%s\n", __FUNCTION__,
80 dentry->d_parent->d_name.name, dentry->d_name.name);
81
82 /* Ensure fs path is a prefix of current dentry path */
83 page = (char *) __get_free_page(GFP_USER);
84 if (page == NULL)
85 goto out;
86 page2 = (char *) __get_free_page(GFP_USER);
87 if (page2 == NULL)
88 goto out;
89
90 path = nfs4_path(dentry, page, PAGE_SIZE);
91 if (IS_ERR(path))
92 goto out_free;
93
94 fs_path = nfs4_pathname_string(&locations->fs_path, page2, PAGE_SIZE);
95 if (IS_ERR(fs_path))
96 goto out_free;
97
98 if (strncmp(path, fs_path, strlen(fs_path)) != 0) {
99 dprintk("%s: path %s does not begin with fsroot %s\n", __FUNCTION__, path, fs_path);
100 goto out_free;
101 }
102
103 devname = nfs_devname(mnt_parent, dentry, page, PAGE_SIZE);
104 if (IS_ERR(devname)) {
105 mnt = (struct vfsmount *)devname;
106 goto out_free;
107 }
108
109 loc = 0;
110 while (loc < locations->nlocations && IS_ERR(mnt)) {
111 struct nfs4_fs_location *location = &locations->locations[loc];
112 char *mnt_path;
113
114 if (location == NULL || location->nservers <= 0 ||
115 location->rootpath.ncomponents == 0) {
116 loc++;
117 continue;
118 }
119
120 mnt_path = nfs4_pathname_string(&location->rootpath, page2, PAGE_SIZE);
121 if (IS_ERR(mnt_path)) {
122 loc++;
123 continue;
124 }
125 mountdata.mnt_path = mnt_path;
126
127 s = 0;
128 while (s < location->nservers) {
129 struct sockaddr_in addr = {};
130
131 if (location->servers[s].len <= 0 ||
132 valid_ipaddr4(location->servers[s].data) < 0) {
133 s++;
134 continue;
135 }
136
137 mountdata.hostname = location->servers[s].data;
138 addr.sin_addr.s_addr = in_aton(mountdata.hostname);
139 addr.sin_family = AF_INET;
140 addr.sin_port = htons(NFS_PORT);
141 mountdata.addr = &addr;
142
143 mnt = vfs_kern_mount(&nfs_referral_nfs4_fs_type, 0, devname, &mountdata);
144 if (!IS_ERR(mnt)) {
145 break;
146 }
147 s++;
148 }
149 loc++;
150 }
151
152out_free:
153 free_page((unsigned long)page);
154 free_page((unsigned long)page2);
155out:
156 dprintk("%s: done\n", __FUNCTION__);
157 return mnt;
158}
159
160/*
161 * nfs_do_refmount - handle crossing a referral on server
162 * @dentry - dentry of referral
163 * @nd - nameidata info
164 *
165 */
166struct vfsmount *nfs_do_refmount(const struct vfsmount *mnt_parent, struct dentry *dentry)
167{
168 struct vfsmount *mnt = ERR_PTR(-ENOENT);
169 struct dentry *parent;
170 struct nfs4_fs_locations *fs_locations = NULL;
171 struct page *page;
172 int err;
173
174 /* BUG_ON(IS_ROOT(dentry)); */
175 dprintk("%s: enter\n", __FUNCTION__);
176
177 page = alloc_page(GFP_KERNEL);
178 if (page == NULL)
179 goto out;
180
181 fs_locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
182 if (fs_locations == NULL)
183 goto out_free;
184
185 /* Get locations */
186 parent = dget_parent(dentry);
187 dprintk("%s: getting locations for %s/%s\n", __FUNCTION__, parent->d_name.name, dentry->d_name.name);
188 err = nfs4_proc_fs_locations(parent->d_inode, dentry, fs_locations, page);
189 dput(parent);
190 if (err != 0 || fs_locations->nlocations <= 0 ||
191 fs_locations->fs_path.ncomponents <= 0)
192 goto out_free;
193
194 mnt = nfs_follow_referral(mnt_parent, dentry, fs_locations);
195out_free:
196 __free_page(page);
197 kfree(fs_locations);
198out:
199 dprintk("%s: done\n", __FUNCTION__);
200 return mnt;
201}
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index d86c0db7b1e8..b4916b092194 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -65,8 +65,6 @@ static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *)
65static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry); 65static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry);
66static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception); 66static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception);
67static int nfs4_wait_clnt_recover(struct rpc_clnt *clnt, struct nfs4_client *clp); 67static int nfs4_wait_clnt_recover(struct rpc_clnt *clnt, struct nfs4_client *clp);
68extern u32 *nfs4_decode_dirent(u32 *p, struct nfs_entry *entry, int plus);
69extern struct rpc_procinfo nfs4_procedures[];
70 68
71/* Prevent leaks of NFSv4 errors into userland */ 69/* Prevent leaks of NFSv4 errors into userland */
72int nfs4_map_errors(int err) 70int nfs4_map_errors(int err)
@@ -121,6 +119,25 @@ const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE
121 0 119 0
122}; 120};
123 121
122const u32 nfs4_fs_locations_bitmap[2] = {
123 FATTR4_WORD0_TYPE
124 | FATTR4_WORD0_CHANGE
125 | FATTR4_WORD0_SIZE
126 | FATTR4_WORD0_FSID
127 | FATTR4_WORD0_FILEID
128 | FATTR4_WORD0_FS_LOCATIONS,
129 FATTR4_WORD1_MODE
130 | FATTR4_WORD1_NUMLINKS
131 | FATTR4_WORD1_OWNER
132 | FATTR4_WORD1_OWNER_GROUP
133 | FATTR4_WORD1_RAWDEV
134 | FATTR4_WORD1_SPACE_USED
135 | FATTR4_WORD1_TIME_ACCESS
136 | FATTR4_WORD1_TIME_METADATA
137 | FATTR4_WORD1_TIME_MODIFY
138 | FATTR4_WORD1_MOUNTED_ON_FILEID
139};
140
124static void nfs4_setup_readdir(u64 cookie, u32 *verifier, struct dentry *dentry, 141static void nfs4_setup_readdir(u64 cookie, u32 *verifier, struct dentry *dentry,
125 struct nfs4_readdir_arg *readdir) 142 struct nfs4_readdir_arg *readdir)
126{ 143{
@@ -185,15 +202,15 @@ static void renew_lease(const struct nfs_server *server, unsigned long timestamp
185 spin_unlock(&clp->cl_lock); 202 spin_unlock(&clp->cl_lock);
186} 203}
187 204
188static void update_changeattr(struct inode *inode, struct nfs4_change_info *cinfo) 205static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
189{ 206{
190 struct nfs_inode *nfsi = NFS_I(inode); 207 struct nfs_inode *nfsi = NFS_I(dir);
191 208
192 spin_lock(&inode->i_lock); 209 spin_lock(&dir->i_lock);
193 nfsi->cache_validity |= NFS_INO_INVALID_ATTR; 210 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
194 if (cinfo->before == nfsi->change_attr && cinfo->atomic) 211 if (cinfo->before == nfsi->change_attr && cinfo->atomic)
195 nfsi->change_attr = cinfo->after; 212 nfsi->change_attr = cinfo->after;
196 spin_unlock(&inode->i_lock); 213 spin_unlock(&dir->i_lock);
197} 214}
198 215
199struct nfs4_opendata { 216struct nfs4_opendata {
@@ -1331,7 +1348,7 @@ static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *f
1331 return status; 1348 return status;
1332} 1349}
1333 1350
1334static int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) 1351int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1335{ 1352{
1336 struct nfs4_exception exception = { }; 1353 struct nfs4_exception exception = { };
1337 int err; 1354 int err;
@@ -1443,6 +1460,50 @@ out:
1443 return nfs4_map_errors(status); 1460 return nfs4_map_errors(status);
1444} 1461}
1445 1462
1463/*
1464 * Get locations and (maybe) other attributes of a referral.
1465 * Note that we'll actually follow the referral later when
1466 * we detect fsid mismatch in inode revalidation
1467 */
1468static int nfs4_get_referral(struct inode *dir, struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
1469{
1470 int status = -ENOMEM;
1471 struct page *page = NULL;
1472 struct nfs4_fs_locations *locations = NULL;
1473 struct dentry dentry = {};
1474
1475 page = alloc_page(GFP_KERNEL);
1476 if (page == NULL)
1477 goto out;
1478 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
1479 if (locations == NULL)
1480 goto out;
1481
1482 dentry.d_name.name = name->name;
1483 dentry.d_name.len = name->len;
1484 status = nfs4_proc_fs_locations(dir, &dentry, locations, page);
1485 if (status != 0)
1486 goto out;
1487 /* Make sure server returned a different fsid for the referral */
1488 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
1489 dprintk("%s: server did not return a different fsid for a referral at %s\n", __FUNCTION__, name->name);
1490 status = -EIO;
1491 goto out;
1492 }
1493
1494 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
1495 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
1496 if (!fattr->mode)
1497 fattr->mode = S_IFDIR;
1498 memset(fhandle, 0, sizeof(struct nfs_fh));
1499out:
1500 if (page)
1501 __free_page(page);
1502 if (locations)
1503 kfree(locations);
1504 return status;
1505}
1506
1446static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr) 1507static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1447{ 1508{
1448 struct nfs4_getattr_arg args = { 1509 struct nfs4_getattr_arg args = {
@@ -1547,6 +1608,8 @@ static int _nfs4_proc_lookup(struct inode *dir, struct qstr *name,
1547 1608
1548 dprintk("NFS call lookup %s\n", name->name); 1609 dprintk("NFS call lookup %s\n", name->name);
1549 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 1610 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
1611 if (status == -NFS4ERR_MOVED)
1612 status = nfs4_get_referral(dir, name, fattr, fhandle);
1550 dprintk("NFS reply lookup: %d\n", status); 1613 dprintk("NFS reply lookup: %d\n", status);
1551 return status; 1614 return status;
1552} 1615}
@@ -2008,7 +2071,7 @@ static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *
2008 if (!status) { 2071 if (!status) {
2009 update_changeattr(dir, &res.cinfo); 2072 update_changeattr(dir, &res.cinfo);
2010 nfs_post_op_update_inode(dir, res.dir_attr); 2073 nfs_post_op_update_inode(dir, res.dir_attr);
2011 nfs_refresh_inode(inode, res.fattr); 2074 nfs_post_op_update_inode(inode, res.fattr);
2012 } 2075 }
2013 2076
2014 return status; 2077 return status;
@@ -3570,6 +3633,36 @@ ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
3570 return len; 3633 return len;
3571} 3634}
3572 3635
3636int nfs4_proc_fs_locations(struct inode *dir, struct dentry *dentry,
3637 struct nfs4_fs_locations *fs_locations, struct page *page)
3638{
3639 struct nfs_server *server = NFS_SERVER(dir);
3640 u32 bitmask[2] = {
3641 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
3642 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
3643 };
3644 struct nfs4_fs_locations_arg args = {
3645 .dir_fh = NFS_FH(dir),
3646 .name = &dentry->d_name,
3647 .page = page,
3648 .bitmask = bitmask,
3649 };
3650 struct rpc_message msg = {
3651 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
3652 .rpc_argp = &args,
3653 .rpc_resp = fs_locations,
3654 };
3655 int status;
3656
3657 dprintk("%s: start\n", __FUNCTION__);
3658 fs_locations->fattr.valid = 0;
3659 fs_locations->server = server;
3660 fs_locations->nlocations = 0;
3661 status = rpc_call_sync(server->client, &msg, 0);
3662 dprintk("%s: returned status = %d\n", __FUNCTION__, status);
3663 return status;
3664}
3665
3573struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops = { 3666struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops = {
3574 .recover_open = nfs4_open_reclaim, 3667 .recover_open = nfs4_open_reclaim,
3575 .recover_lock = nfs4_lock_reclaim, 3668 .recover_lock = nfs4_lock_reclaim,
diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c
index 7c5d70efe720..1750d996f49f 100644
--- a/fs/nfs/nfs4xdr.c
+++ b/fs/nfs/nfs4xdr.c
@@ -411,6 +411,15 @@ static int nfs_stat_to_errno(int);
411#define NFS4_dec_setacl_sz (compound_decode_hdr_maxsz + \ 411#define NFS4_dec_setacl_sz (compound_decode_hdr_maxsz + \
412 decode_putfh_maxsz + \ 412 decode_putfh_maxsz + \
413 op_decode_hdr_maxsz + nfs4_fattr_bitmap_maxsz) 413 op_decode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
414#define NFS4_enc_fs_locations_sz \
415 (compound_encode_hdr_maxsz + \
416 encode_putfh_maxsz + \
417 encode_getattr_maxsz)
418#define NFS4_dec_fs_locations_sz \
419 (compound_decode_hdr_maxsz + \
420 decode_putfh_maxsz + \
421 op_decode_hdr_maxsz + \
422 nfs4_fattr_bitmap_maxsz)
414 423
415static struct { 424static struct {
416 unsigned int mode; 425 unsigned int mode;
@@ -722,6 +731,13 @@ static int encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask)
722 bitmask[1] & nfs4_fsinfo_bitmap[1]); 731 bitmask[1] & nfs4_fsinfo_bitmap[1]);
723} 732}
724 733
734static int encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask)
735{
736 return encode_getattr_two(xdr,
737 bitmask[0] & nfs4_fs_locations_bitmap[0],
738 bitmask[1] & nfs4_fs_locations_bitmap[1]);
739}
740
725static int encode_getfh(struct xdr_stream *xdr) 741static int encode_getfh(struct xdr_stream *xdr)
726{ 742{
727 uint32_t *p; 743 uint32_t *p;
@@ -2003,6 +2019,38 @@ out:
2003} 2019}
2004 2020
2005/* 2021/*
2022 * Encode FS_LOCATIONS request
2023 */
2024static int nfs4_xdr_enc_fs_locations(struct rpc_rqst *req, uint32_t *p, struct nfs4_fs_locations_arg *args)
2025{
2026 struct xdr_stream xdr;
2027 struct compound_hdr hdr = {
2028 .nops = 3,
2029 };
2030 struct rpc_auth *auth = req->rq_task->tk_auth;
2031 int replen;
2032 int status;
2033
2034 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2035 encode_compound_hdr(&xdr, &hdr);
2036 if ((status = encode_putfh(&xdr, args->dir_fh)) != 0)
2037 goto out;
2038 if ((status = encode_lookup(&xdr, args->name)) != 0)
2039 goto out;
2040 if ((status = encode_fs_locations(&xdr, args->bitmask)) != 0)
2041 goto out;
2042 /* set up reply
2043 * toplevel_status + OP_PUTFH + status
2044 * + OP_LOOKUP + status + OP_GETATTR + status = 7
2045 */
2046 replen = (RPC_REPHDRSIZE + auth->au_rslack + 7) << 2;
2047 xdr_inline_pages(&req->rq_rcv_buf, replen, &args->page,
2048 0, PAGE_SIZE);
2049out:
2050 return status;
2051}
2052
2053/*
2006 * START OF "GENERIC" DECODE ROUTINES. 2054 * START OF "GENERIC" DECODE ROUTINES.
2007 * These may look a little ugly since they are imported from a "generic" 2055 * These may look a little ugly since they are imported from a "generic"
2008 * set of XDR encode/decode routines which are intended to be shared by 2056 * set of XDR encode/decode routines which are intended to be shared by
@@ -2036,7 +2084,7 @@ out:
2036 } \ 2084 } \
2037} while (0) 2085} while (0)
2038 2086
2039static int decode_opaque_inline(struct xdr_stream *xdr, uint32_t *len, char **string) 2087static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
2040{ 2088{
2041 uint32_t *p; 2089 uint32_t *p;
2042 2090
@@ -2087,7 +2135,7 @@ static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
2087static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs4_client *clp) 2135static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs4_client *clp)
2088{ 2136{
2089 uint32_t *p; 2137 uint32_t *p;
2090 uint32_t strlen; 2138 unsigned int strlen;
2091 char *str; 2139 char *str;
2092 2140
2093 READ_BUF(12); 2141 READ_BUF(12);
@@ -2217,7 +2265,7 @@ static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap,
2217 return 0; 2265 return 0;
2218} 2266}
2219 2267
2220static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fsid *fsid) 2268static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
2221{ 2269{
2222 uint32_t *p; 2270 uint32_t *p;
2223 2271
@@ -2285,6 +2333,22 @@ static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t
2285 return 0; 2333 return 0;
2286} 2334}
2287 2335
2336static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2337{
2338 uint32_t *p;
2339
2340 *fileid = 0;
2341 if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
2342 return -EIO;
2343 if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
2344 READ_BUF(8);
2345 READ64(*fileid);
2346 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
2347 }
2348 dprintk("%s: fileid=%Lu\n", __FUNCTION__, (unsigned long long)*fileid);
2349 return 0;
2350}
2351
2288static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res) 2352static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2289{ 2353{
2290 uint32_t *p; 2354 uint32_t *p;
@@ -2336,6 +2400,116 @@ static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uin
2336 return status; 2400 return status;
2337} 2401}
2338 2402
2403static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
2404{
2405 int n;
2406 uint32_t *p;
2407 int status = 0;
2408
2409 READ_BUF(4);
2410 READ32(n);
2411 if (n < 0)
2412 goto out_eio;
2413 if (n == 0)
2414 goto root_path;
2415 dprintk("path ");
2416 path->ncomponents = 0;
2417 while (path->ncomponents < n) {
2418 struct nfs4_string *component = &path->components[path->ncomponents];
2419 status = decode_opaque_inline(xdr, &component->len, &component->data);
2420 if (unlikely(status != 0))
2421 goto out_eio;
2422 if (path->ncomponents != n)
2423 dprintk("/");
2424 dprintk("%s", component->data);
2425 if (path->ncomponents < NFS4_PATHNAME_MAXCOMPONENTS)
2426 path->ncomponents++;
2427 else {
2428 dprintk("cannot parse %d components in path\n", n);
2429 goto out_eio;
2430 }
2431 }
2432out:
2433 dprintk("\n");
2434 return status;
2435root_path:
2436/* a root pathname is sent as a zero component4 */
2437 path->ncomponents = 1;
2438 path->components[0].len=0;
2439 path->components[0].data=NULL;
2440 dprintk("path /\n");
2441 goto out;
2442out_eio:
2443 dprintk(" status %d", status);
2444 status = -EIO;
2445 goto out;
2446}
2447
2448static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
2449{
2450 int n;
2451 uint32_t *p;
2452 int status = -EIO;
2453
2454 if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
2455 goto out;
2456 status = 0;
2457 if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
2458 goto out;
2459 dprintk("%s: fsroot ", __FUNCTION__);
2460 status = decode_pathname(xdr, &res->fs_path);
2461 if (unlikely(status != 0))
2462 goto out;
2463 READ_BUF(4);
2464 READ32(n);
2465 if (n <= 0)
2466 goto out_eio;
2467 res->nlocations = 0;
2468 while (res->nlocations < n) {
2469 int m;
2470 struct nfs4_fs_location *loc = &res->locations[res->nlocations];
2471
2472 READ_BUF(4);
2473 READ32(m);
2474 if (m <= 0)
2475 goto out_eio;
2476
2477 loc->nservers = 0;
2478 dprintk("%s: servers ", __FUNCTION__);
2479 while (loc->nservers < m) {
2480 struct nfs4_string *server = &loc->servers[loc->nservers];
2481 status = decode_opaque_inline(xdr, &server->len, &server->data);
2482 if (unlikely(status != 0))
2483 goto out_eio;
2484 dprintk("%s ", server->data);
2485 if (loc->nservers < NFS4_FS_LOCATION_MAXSERVERS)
2486 loc->nservers++;
2487 else {
2488 int i;
2489 dprintk("%s: using first %d of %d servers returned for location %d\n", __FUNCTION__, NFS4_FS_LOCATION_MAXSERVERS, m, res->nlocations);
2490 for (i = loc->nservers; i < m; i++) {
2491 int len;
2492 char *data;
2493 status = decode_opaque_inline(xdr, &len, &data);
2494 if (unlikely(status != 0))
2495 goto out_eio;
2496 }
2497 }
2498 }
2499 status = decode_pathname(xdr, &loc->rootpath);
2500 if (unlikely(status != 0))
2501 goto out_eio;
2502 if (res->nlocations < NFS4_FS_LOCATIONS_MAXENTRIES)
2503 res->nlocations++;
2504 }
2505out:
2506 dprintk("%s: fs_locations done, error = %d\n", __FUNCTION__, status);
2507 return status;
2508out_eio:
2509 status = -EIO;
2510 goto out;
2511}
2512
2339static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res) 2513static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2340{ 2514{
2341 uint32_t *p; 2515 uint32_t *p;
@@ -2841,6 +3015,7 @@ static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr, cons
2841 bitmap[2] = {0}, 3015 bitmap[2] = {0},
2842 type; 3016 type;
2843 int status, fmode = 0; 3017 int status, fmode = 0;
3018 uint64_t fileid;
2844 3019
2845 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0) 3020 if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
2846 goto xdr_error; 3021 goto xdr_error;
@@ -2863,10 +3038,14 @@ static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr, cons
2863 goto xdr_error; 3038 goto xdr_error;
2864 if ((status = decode_attr_size(xdr, bitmap, &fattr->size)) != 0) 3039 if ((status = decode_attr_size(xdr, bitmap, &fattr->size)) != 0)
2865 goto xdr_error; 3040 goto xdr_error;
2866 if ((status = decode_attr_fsid(xdr, bitmap, &fattr->fsid_u.nfs4)) != 0) 3041 if ((status = decode_attr_fsid(xdr, bitmap, &fattr->fsid)) != 0)
2867 goto xdr_error; 3042 goto xdr_error;
2868 if ((status = decode_attr_fileid(xdr, bitmap, &fattr->fileid)) != 0) 3043 if ((status = decode_attr_fileid(xdr, bitmap, &fattr->fileid)) != 0)
2869 goto xdr_error; 3044 goto xdr_error;
3045 if ((status = decode_attr_fs_locations(xdr, bitmap, container_of(fattr,
3046 struct nfs4_fs_locations,
3047 fattr))) != 0)
3048 goto xdr_error;
2870 if ((status = decode_attr_mode(xdr, bitmap, &fattr->mode)) != 0) 3049 if ((status = decode_attr_mode(xdr, bitmap, &fattr->mode)) != 0)
2871 goto xdr_error; 3050 goto xdr_error;
2872 fattr->mode |= fmode; 3051 fattr->mode |= fmode;
@@ -2886,6 +3065,10 @@ static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr, cons
2886 goto xdr_error; 3065 goto xdr_error;
2887 if ((status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime)) != 0) 3066 if ((status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime)) != 0)
2888 goto xdr_error; 3067 goto xdr_error;
3068 if ((status = decode_attr_mounted_on_fileid(xdr, bitmap, &fileid)) != 0)
3069 goto xdr_error;
3070 if (fattr->fileid == 0 && fileid != 0)
3071 fattr->fileid = fileid;
2889 if ((status = verify_attr_len(xdr, savep, attrlen)) == 0) 3072 if ((status = verify_attr_len(xdr, savep, attrlen)) == 0)
2890 fattr->valid = NFS_ATTR_FATTR | NFS_ATTR_FATTR_V3 | NFS_ATTR_FATTR_V4; 3073 fattr->valid = NFS_ATTR_FATTR | NFS_ATTR_FATTR_V3 | NFS_ATTR_FATTR_V4;
2891xdr_error: 3074xdr_error:
@@ -3350,8 +3533,7 @@ static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
3350 attrlen, recvd); 3533 attrlen, recvd);
3351 return -EINVAL; 3534 return -EINVAL;
3352 } 3535 }
3353 if (attrlen <= *acl_len) 3536 xdr_read_pages(xdr, attrlen);
3354 xdr_read_pages(xdr, attrlen);
3355 *acl_len = attrlen; 3537 *acl_len = attrlen;
3356 } else 3538 } else
3357 status = -EOPNOTSUPP; 3539 status = -EOPNOTSUPP;
@@ -4211,6 +4393,29 @@ out:
4211 return status; 4393 return status;
4212} 4394}
4213 4395
4396/*
4397 * FS_LOCATIONS request
4398 */
4399static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req, uint32_t *p, struct nfs4_fs_locations *res)
4400{
4401 struct xdr_stream xdr;
4402 struct compound_hdr hdr;
4403 int status;
4404
4405 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4406 status = decode_compound_hdr(&xdr, &hdr);
4407 if (status != 0)
4408 goto out;
4409 if ((status = decode_putfh(&xdr)) != 0)
4410 goto out;
4411 if ((status = decode_lookup(&xdr)) != 0)
4412 goto out;
4413 xdr_enter_page(&xdr, PAGE_SIZE);
4414 status = decode_getfattr(&xdr, &res->fattr, res->server);
4415out:
4416 return status;
4417}
4418
4214uint32_t *nfs4_decode_dirent(uint32_t *p, struct nfs_entry *entry, int plus) 4419uint32_t *nfs4_decode_dirent(uint32_t *p, struct nfs_entry *entry, int plus)
4215{ 4420{
4216 uint32_t bitmap[2] = {0}; 4421 uint32_t bitmap[2] = {0};
@@ -4382,6 +4587,7 @@ struct rpc_procinfo nfs4_procedures[] = {
4382 PROC(DELEGRETURN, enc_delegreturn, dec_delegreturn), 4587 PROC(DELEGRETURN, enc_delegreturn, dec_delegreturn),
4383 PROC(GETACL, enc_getacl, dec_getacl), 4588 PROC(GETACL, enc_getacl, dec_getacl),
4384 PROC(SETACL, enc_setacl, dec_setacl), 4589 PROC(SETACL, enc_setacl, dec_setacl),
4590 PROC(FS_LOCATIONS, enc_fs_locations, dec_fs_locations),
4385}; 4591};
4386 4592
4387struct rpc_version nfs_version4 = { 4593struct rpc_version nfs_version4 = {
diff --git a/fs/nfs/pagelist.c b/fs/nfs/pagelist.c
index 106aca388ebc..ef9429643ebc 100644
--- a/fs/nfs/pagelist.c
+++ b/fs/nfs/pagelist.c
@@ -325,6 +325,7 @@ out:
325 325
326/** 326/**
327 * nfs_scan_list - Scan a list for matching requests 327 * nfs_scan_list - Scan a list for matching requests
328 * @nfsi: NFS inode
328 * @head: One of the NFS inode request lists 329 * @head: One of the NFS inode request lists
329 * @dst: Destination list 330 * @dst: Destination list
330 * @idx_start: lower bound of page->index to scan 331 * @idx_start: lower bound of page->index to scan
@@ -336,14 +337,15 @@ out:
336 * The requests are *not* checked to ensure that they form a contiguous set. 337 * The requests are *not* checked to ensure that they form a contiguous set.
337 * You must be holding the inode's req_lock when calling this function 338 * You must be holding the inode's req_lock when calling this function
338 */ 339 */
339int 340int nfs_scan_list(struct nfs_inode *nfsi, struct list_head *head,
340nfs_scan_list(struct list_head *head, struct list_head *dst, 341 struct list_head *dst, unsigned long idx_start,
341 unsigned long idx_start, unsigned int npages) 342 unsigned int npages)
342{ 343{
343 struct list_head *pos, *tmp; 344 struct nfs_page *pgvec[NFS_SCAN_MAXENTRIES];
344 struct nfs_page *req; 345 struct nfs_page *req;
345 unsigned long idx_end; 346 unsigned long idx_end;
346 int res; 347 int found, i;
348 int res;
347 349
348 res = 0; 350 res = 0;
349 if (npages == 0) 351 if (npages == 0)
@@ -351,25 +353,32 @@ nfs_scan_list(struct list_head *head, struct list_head *dst,
351 else 353 else
352 idx_end = idx_start + npages - 1; 354 idx_end = idx_start + npages - 1;
353 355
354 list_for_each_safe(pos, tmp, head) { 356 for (;;) {
355 357 found = radix_tree_gang_lookup(&nfsi->nfs_page_tree,
356 req = nfs_list_entry(pos); 358 (void **)&pgvec[0], idx_start,
357 359 NFS_SCAN_MAXENTRIES);
358 if (req->wb_index < idx_start) 360 if (found <= 0)
359 continue;
360 if (req->wb_index > idx_end)
361 break; 361 break;
362 for (i = 0; i < found; i++) {
363 req = pgvec[i];
364 if (req->wb_index > idx_end)
365 goto out;
366 idx_start = req->wb_index + 1;
367 if (req->wb_list_head != head)
368 continue;
369 if (nfs_set_page_writeback_locked(req)) {
370 nfs_list_remove_request(req);
371 nfs_list_add_request(req, dst);
372 res++;
373 }
374 }
362 375
363 if (!nfs_set_page_writeback_locked(req))
364 continue;
365 nfs_list_remove_request(req);
366 nfs_list_add_request(req, dst);
367 res++;
368 } 376 }
377out:
369 return res; 378 return res;
370} 379}
371 380
372int nfs_init_nfspagecache(void) 381int __init nfs_init_nfspagecache(void)
373{ 382{
374 nfs_page_cachep = kmem_cache_create("nfs_page", 383 nfs_page_cachep = kmem_cache_create("nfs_page",
375 sizeof(struct nfs_page), 384 sizeof(struct nfs_page),
@@ -381,7 +390,7 @@ int nfs_init_nfspagecache(void)
381 return 0; 390 return 0;
382} 391}
383 392
384void nfs_destroy_nfspagecache(void) 393void __exit nfs_destroy_nfspagecache(void)
385{ 394{
386 if (kmem_cache_destroy(nfs_page_cachep)) 395 if (kmem_cache_destroy(nfs_page_cachep))
387 printk(KERN_INFO "nfs_page: not all structures were freed\n"); 396 printk(KERN_INFO "nfs_page: not all structures were freed\n");
diff --git a/fs/nfs/proc.c b/fs/nfs/proc.c
index 9dd85cac2df0..b3899ea3229e 100644
--- a/fs/nfs/proc.c
+++ b/fs/nfs/proc.c
@@ -44,11 +44,10 @@
44#include <linux/nfs_page.h> 44#include <linux/nfs_page.h>
45#include <linux/lockd/bind.h> 45#include <linux/lockd/bind.h>
46#include <linux/smp_lock.h> 46#include <linux/smp_lock.h>
47#include "internal.h"
47 48
48#define NFSDBG_FACILITY NFSDBG_PROC 49#define NFSDBG_FACILITY NFSDBG_PROC
49 50
50extern struct rpc_procinfo nfs_procedures[];
51
52/* 51/*
53 * Bare-bones access to getattr: this is for nfs_read_super. 52 * Bare-bones access to getattr: this is for nfs_read_super.
54 */ 53 */
@@ -611,8 +610,6 @@ nfs_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
611 return 0; 610 return 0;
612} 611}
613 612
614extern u32 * nfs_decode_dirent(u32 *, struct nfs_entry *, int);
615
616static int nfs_read_done(struct rpc_task *task, struct nfs_read_data *data) 613static int nfs_read_done(struct rpc_task *task, struct nfs_read_data *data)
617{ 614{
618 if (task->tk_status >= 0) { 615 if (task->tk_status >= 0) {
diff --git a/fs/nfs/read.c b/fs/nfs/read.c
index 624ca7146b6b..41c2ffee24f5 100644
--- a/fs/nfs/read.c
+++ b/fs/nfs/read.c
@@ -51,14 +51,11 @@ struct nfs_read_data *nfs_readdata_alloc(unsigned int pagecount)
51 if (p) { 51 if (p) {
52 memset(p, 0, sizeof(*p)); 52 memset(p, 0, sizeof(*p));
53 INIT_LIST_HEAD(&p->pages); 53 INIT_LIST_HEAD(&p->pages);
54 if (pagecount < NFS_PAGEVEC_SIZE) 54 if (pagecount <= ARRAY_SIZE(p->page_array))
55 p->pagevec = &p->page_array[0]; 55 p->pagevec = p->page_array;
56 else { 56 else {
57 size_t size = ++pagecount * sizeof(struct page *); 57 p->pagevec = kcalloc(pagecount, sizeof(struct page *), GFP_NOFS);
58 p->pagevec = kmalloc(size, GFP_NOFS); 58 if (!p->pagevec) {
59 if (p->pagevec) {
60 memset(p->pagevec, 0, size);
61 } else {
62 mempool_free(p, nfs_rdata_mempool); 59 mempool_free(p, nfs_rdata_mempool);
63 p = NULL; 60 p = NULL;
64 } 61 }
@@ -104,6 +101,28 @@ int nfs_return_empty_page(struct page *page)
104 return 0; 101 return 0;
105} 102}
106 103
104static void nfs_readpage_truncate_uninitialised_page(struct nfs_read_data *data)
105{
106 unsigned int remainder = data->args.count - data->res.count;
107 unsigned int base = data->args.pgbase + data->res.count;
108 unsigned int pglen;
109 struct page **pages;
110
111 if (data->res.eof == 0 || remainder == 0)
112 return;
113 /*
114 * Note: "remainder" can never be negative, since we check for
115 * this in the XDR code.
116 */
117 pages = &data->args.pages[base >> PAGE_CACHE_SHIFT];
118 base &= ~PAGE_CACHE_MASK;
119 pglen = PAGE_CACHE_SIZE - base;
120 if (pglen < remainder)
121 memclear_highpage_flush(*pages, base, pglen);
122 else
123 memclear_highpage_flush(*pages, base, remainder);
124}
125
107/* 126/*
108 * Read a page synchronously. 127 * Read a page synchronously.
109 */ 128 */
@@ -177,11 +196,9 @@ static int nfs_readpage_sync(struct nfs_open_context *ctx, struct inode *inode,
177 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATIME; 196 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATIME;
178 spin_unlock(&inode->i_lock); 197 spin_unlock(&inode->i_lock);
179 198
180 if (count) 199 nfs_readpage_truncate_uninitialised_page(rdata);
181 memclear_highpage_flush(page, rdata->args.pgbase, count); 200 if (rdata->res.eof || rdata->res.count == rdata->args.count)
182 SetPageUptodate(page); 201 SetPageUptodate(page);
183 if (PageError(page))
184 ClearPageError(page);
185 result = 0; 202 result = 0;
186 203
187io_error: 204io_error:
@@ -436,20 +453,12 @@ static void nfs_readpage_result_partial(struct rpc_task *task, void *calldata)
436 struct nfs_page *req = data->req; 453 struct nfs_page *req = data->req;
437 struct page *page = req->wb_page; 454 struct page *page = req->wb_page;
438 455
456 if (likely(task->tk_status >= 0))
457 nfs_readpage_truncate_uninitialised_page(data);
458 else
459 SetPageError(page);
439 if (nfs_readpage_result(task, data) != 0) 460 if (nfs_readpage_result(task, data) != 0)
440 return; 461 return;
441 if (task->tk_status >= 0) {
442 unsigned int request = data->args.count;
443 unsigned int result = data->res.count;
444
445 if (result < request) {
446 memclear_highpage_flush(page,
447 data->args.pgbase + result,
448 request - result);
449 }
450 } else
451 SetPageError(page);
452
453 if (atomic_dec_and_test(&req->wb_complete)) { 462 if (atomic_dec_and_test(&req->wb_complete)) {
454 if (!PageError(page)) 463 if (!PageError(page))
455 SetPageUptodate(page); 464 SetPageUptodate(page);
@@ -462,6 +471,40 @@ static const struct rpc_call_ops nfs_read_partial_ops = {
462 .rpc_release = nfs_readdata_release, 471 .rpc_release = nfs_readdata_release,
463}; 472};
464 473
474static void nfs_readpage_set_pages_uptodate(struct nfs_read_data *data)
475{
476 unsigned int count = data->res.count;
477 unsigned int base = data->args.pgbase;
478 struct page **pages;
479
480 if (unlikely(count == 0))
481 return;
482 pages = &data->args.pages[base >> PAGE_CACHE_SHIFT];
483 base &= ~PAGE_CACHE_MASK;
484 count += base;
485 for (;count >= PAGE_CACHE_SIZE; count -= PAGE_CACHE_SIZE, pages++)
486 SetPageUptodate(*pages);
487 /*
488 * Was this an eof or a short read? If the latter, don't mark the page
489 * as uptodate yet.
490 */
491 if (count > 0 && (data->res.eof || data->args.count == data->res.count))
492 SetPageUptodate(*pages);
493}
494
495static void nfs_readpage_set_pages_error(struct nfs_read_data *data)
496{
497 unsigned int count = data->args.count;
498 unsigned int base = data->args.pgbase;
499 struct page **pages;
500
501 pages = &data->args.pages[base >> PAGE_CACHE_SHIFT];
502 base &= ~PAGE_CACHE_MASK;
503 count += base;
504 for (;count >= PAGE_CACHE_SIZE; count -= PAGE_CACHE_SIZE, pages++)
505 SetPageError(*pages);
506}
507
465/* 508/*
466 * This is the callback from RPC telling us whether a reply was 509 * This is the callback from RPC telling us whether a reply was
467 * received or some error occurred (timeout or socket shutdown). 510 * received or some error occurred (timeout or socket shutdown).
@@ -469,27 +512,24 @@ static const struct rpc_call_ops nfs_read_partial_ops = {
469static void nfs_readpage_result_full(struct rpc_task *task, void *calldata) 512static void nfs_readpage_result_full(struct rpc_task *task, void *calldata)
470{ 513{
471 struct nfs_read_data *data = calldata; 514 struct nfs_read_data *data = calldata;
472 unsigned int count = data->res.count;
473 515
516 /*
517 * Note: nfs_readpage_result may change the values of
518 * data->args. In the multi-page case, we therefore need
519 * to ensure that we call the next nfs_readpage_set_page_uptodate()
520 * first in the multi-page case.
521 */
522 if (likely(task->tk_status >= 0)) {
523 nfs_readpage_truncate_uninitialised_page(data);
524 nfs_readpage_set_pages_uptodate(data);
525 } else
526 nfs_readpage_set_pages_error(data);
474 if (nfs_readpage_result(task, data) != 0) 527 if (nfs_readpage_result(task, data) != 0)
475 return; 528 return;
476 while (!list_empty(&data->pages)) { 529 while (!list_empty(&data->pages)) {
477 struct nfs_page *req = nfs_list_entry(data->pages.next); 530 struct nfs_page *req = nfs_list_entry(data->pages.next);
478 struct page *page = req->wb_page;
479 nfs_list_remove_request(req);
480 531
481 if (task->tk_status >= 0) { 532 nfs_list_remove_request(req);
482 if (count < PAGE_CACHE_SIZE) {
483 if (count < req->wb_bytes)
484 memclear_highpage_flush(page,
485 req->wb_pgbase + count,
486 req->wb_bytes - count);
487 count = 0;
488 } else
489 count -= PAGE_CACHE_SIZE;
490 SetPageUptodate(page);
491 } else
492 SetPageError(page);
493 nfs_readpage_release(req); 533 nfs_readpage_release(req);
494 } 534 }
495} 535}
@@ -654,7 +694,7 @@ int nfs_readpages(struct file *filp, struct address_space *mapping,
654 return ret; 694 return ret;
655} 695}
656 696
657int nfs_init_readpagecache(void) 697int __init nfs_init_readpagecache(void)
658{ 698{
659 nfs_rdata_cachep = kmem_cache_create("nfs_read_data", 699 nfs_rdata_cachep = kmem_cache_create("nfs_read_data",
660 sizeof(struct nfs_read_data), 700 sizeof(struct nfs_read_data),
@@ -671,7 +711,7 @@ int nfs_init_readpagecache(void)
671 return 0; 711 return 0;
672} 712}
673 713
674void nfs_destroy_readpagecache(void) 714void __exit nfs_destroy_readpagecache(void)
675{ 715{
676 mempool_destroy(nfs_rdata_mempool); 716 mempool_destroy(nfs_rdata_mempool);
677 if (kmem_cache_destroy(nfs_rdata_cachep)) 717 if (kmem_cache_destroy(nfs_rdata_cachep))
diff --git a/fs/nfs/super.c b/fs/nfs/super.c
new file mode 100644
index 000000000000..e8a9bee74d9d
--- /dev/null
+++ b/fs/nfs/super.c
@@ -0,0 +1,1537 @@
1/*
2 * linux/fs/nfs/super.c
3 *
4 * Copyright (C) 1992 Rick Sladkey
5 *
6 * nfs superblock handling functions
7 *
8 * Modularised by Alan Cox <Alan.Cox@linux.org>, while hacking some
9 * experimental NFS changes. Modularisation taken straight from SYS5 fs.
10 *
11 * Change to nfs_read_super() to permit NFS mounts to multi-homed hosts.
12 * J.S.Peatfield@damtp.cam.ac.uk
13 *
14 * Split from inode.c by David Howells <dhowells@redhat.com>
15 *
16 */
17
18#include <linux/config.h>
19#include <linux/module.h>
20#include <linux/init.h>
21
22#include <linux/time.h>
23#include <linux/kernel.h>
24#include <linux/mm.h>
25#include <linux/string.h>
26#include <linux/stat.h>
27#include <linux/errno.h>
28#include <linux/unistd.h>
29#include <linux/sunrpc/clnt.h>
30#include <linux/sunrpc/stats.h>
31#include <linux/sunrpc/metrics.h>
32#include <linux/nfs_fs.h>
33#include <linux/nfs_mount.h>
34#include <linux/nfs4_mount.h>
35#include <linux/lockd/bind.h>
36#include <linux/smp_lock.h>
37#include <linux/seq_file.h>
38#include <linux/mount.h>
39#include <linux/nfs_idmap.h>
40#include <linux/vfs.h>
41#include <linux/inet.h>
42#include <linux/nfs_xdr.h>
43
44#include <asm/system.h>
45#include <asm/uaccess.h>
46
47#include "nfs4_fs.h"
48#include "callback.h"
49#include "delegation.h"
50#include "iostat.h"
51#include "internal.h"
52
53#define NFSDBG_FACILITY NFSDBG_VFS
54
55/* Maximum number of readahead requests
56 * FIXME: this should really be a sysctl so that users may tune it to suit
57 * their needs. People that do NFS over a slow network, might for
58 * instance want to reduce it to something closer to 1 for improved
59 * interactive response.
60 */
61#define NFS_MAX_READAHEAD (RPC_DEF_SLOT_TABLE - 1)
62
63/*
64 * RPC cruft for NFS
65 */
66static struct rpc_version * nfs_version[] = {
67 NULL,
68 NULL,
69 &nfs_version2,
70#if defined(CONFIG_NFS_V3)
71 &nfs_version3,
72#elif defined(CONFIG_NFS_V4)
73 NULL,
74#endif
75#if defined(CONFIG_NFS_V4)
76 &nfs_version4,
77#endif
78};
79
80static struct rpc_program nfs_program = {
81 .name = "nfs",
82 .number = NFS_PROGRAM,
83 .nrvers = ARRAY_SIZE(nfs_version),
84 .version = nfs_version,
85 .stats = &nfs_rpcstat,
86 .pipe_dir_name = "/nfs",
87};
88
89struct rpc_stat nfs_rpcstat = {
90 .program = &nfs_program
91};
92
93
94#ifdef CONFIG_NFS_V3_ACL
95static struct rpc_stat nfsacl_rpcstat = { &nfsacl_program };
96static struct rpc_version * nfsacl_version[] = {
97 [3] = &nfsacl_version3,
98};
99
100struct rpc_program nfsacl_program = {
101 .name = "nfsacl",
102 .number = NFS_ACL_PROGRAM,
103 .nrvers = ARRAY_SIZE(nfsacl_version),
104 .version = nfsacl_version,
105 .stats = &nfsacl_rpcstat,
106};
107#endif /* CONFIG_NFS_V3_ACL */
108
109static void nfs_umount_begin(struct vfsmount *, int);
110static int nfs_statfs(struct dentry *, struct kstatfs *);
111static int nfs_show_options(struct seq_file *, struct vfsmount *);
112static int nfs_show_stats(struct seq_file *, struct vfsmount *);
113static int nfs_get_sb(struct file_system_type *, int, const char *, void *, struct vfsmount *);
114static int nfs_clone_nfs_sb(struct file_system_type *fs_type,
115 int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt);
116static void nfs_kill_super(struct super_block *);
117
118static struct file_system_type nfs_fs_type = {
119 .owner = THIS_MODULE,
120 .name = "nfs",
121 .get_sb = nfs_get_sb,
122 .kill_sb = nfs_kill_super,
123 .fs_flags = FS_ODD_RENAME|FS_REVAL_DOT|FS_BINARY_MOUNTDATA,
124};
125
126struct file_system_type clone_nfs_fs_type = {
127 .owner = THIS_MODULE,
128 .name = "nfs",
129 .get_sb = nfs_clone_nfs_sb,
130 .kill_sb = nfs_kill_super,
131 .fs_flags = FS_ODD_RENAME|FS_REVAL_DOT|FS_BINARY_MOUNTDATA,
132};
133
134static struct super_operations nfs_sops = {
135 .alloc_inode = nfs_alloc_inode,
136 .destroy_inode = nfs_destroy_inode,
137 .write_inode = nfs_write_inode,
138 .statfs = nfs_statfs,
139 .clear_inode = nfs_clear_inode,
140 .umount_begin = nfs_umount_begin,
141 .show_options = nfs_show_options,
142 .show_stats = nfs_show_stats,
143};
144
145#ifdef CONFIG_NFS_V4
146static int nfs4_get_sb(struct file_system_type *fs_type,
147 int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt);
148static int nfs_clone_nfs4_sb(struct file_system_type *fs_type,
149 int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt);
150static int nfs_referral_nfs4_sb(struct file_system_type *fs_type,
151 int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt);
152static void nfs4_kill_super(struct super_block *sb);
153
154static struct file_system_type nfs4_fs_type = {
155 .owner = THIS_MODULE,
156 .name = "nfs4",
157 .get_sb = nfs4_get_sb,
158 .kill_sb = nfs4_kill_super,
159 .fs_flags = FS_ODD_RENAME|FS_REVAL_DOT|FS_BINARY_MOUNTDATA,
160};
161
162struct file_system_type clone_nfs4_fs_type = {
163 .owner = THIS_MODULE,
164 .name = "nfs4",
165 .get_sb = nfs_clone_nfs4_sb,
166 .kill_sb = nfs4_kill_super,
167 .fs_flags = FS_ODD_RENAME|FS_REVAL_DOT|FS_BINARY_MOUNTDATA,
168};
169
170struct file_system_type nfs_referral_nfs4_fs_type = {
171 .owner = THIS_MODULE,
172 .name = "nfs4",
173 .get_sb = nfs_referral_nfs4_sb,
174 .kill_sb = nfs4_kill_super,
175 .fs_flags = FS_ODD_RENAME|FS_REVAL_DOT|FS_BINARY_MOUNTDATA,
176};
177
178static struct super_operations nfs4_sops = {
179 .alloc_inode = nfs_alloc_inode,
180 .destroy_inode = nfs_destroy_inode,
181 .write_inode = nfs_write_inode,
182 .statfs = nfs_statfs,
183 .clear_inode = nfs4_clear_inode,
184 .umount_begin = nfs_umount_begin,
185 .show_options = nfs_show_options,
186 .show_stats = nfs_show_stats,
187};
188#endif
189
190#ifdef CONFIG_NFS_V4
191static const int nfs_set_port_min = 0;
192static const int nfs_set_port_max = 65535;
193
194static int param_set_port(const char *val, struct kernel_param *kp)
195{
196 char *endp;
197 int num = simple_strtol(val, &endp, 0);
198 if (endp == val || *endp || num < nfs_set_port_min || num > nfs_set_port_max)
199 return -EINVAL;
200 *((int *)kp->arg) = num;
201 return 0;
202}
203
204module_param_call(callback_tcpport, param_set_port, param_get_int,
205 &nfs_callback_set_tcpport, 0644);
206#endif
207
208#ifdef CONFIG_NFS_V4
209static int param_set_idmap_timeout(const char *val, struct kernel_param *kp)
210{
211 char *endp;
212 int num = simple_strtol(val, &endp, 0);
213 int jif = num * HZ;
214 if (endp == val || *endp || num < 0 || jif < num)
215 return -EINVAL;
216 *((int *)kp->arg) = jif;
217 return 0;
218}
219
220module_param_call(idmap_cache_timeout, param_set_idmap_timeout, param_get_int,
221 &nfs_idmap_cache_timeout, 0644);
222#endif
223
224/*
225 * Register the NFS filesystems
226 */
227int __init register_nfs_fs(void)
228{
229 int ret;
230
231 ret = register_filesystem(&nfs_fs_type);
232 if (ret < 0)
233 goto error_0;
234
235#ifdef CONFIG_NFS_V4
236 ret = nfs_register_sysctl();
237 if (ret < 0)
238 goto error_1;
239 ret = register_filesystem(&nfs4_fs_type);
240 if (ret < 0)
241 goto error_2;
242#endif
243 return 0;
244
245#ifdef CONFIG_NFS_V4
246error_2:
247 nfs_unregister_sysctl();
248error_1:
249 unregister_filesystem(&nfs_fs_type);
250#endif
251error_0:
252 return ret;
253}
254
255/*
256 * Unregister the NFS filesystems
257 */
258void __exit unregister_nfs_fs(void)
259{
260#ifdef CONFIG_NFS_V4
261 unregister_filesystem(&nfs4_fs_type);
262 nfs_unregister_sysctl();
263#endif
264 unregister_filesystem(&nfs_fs_type);
265}
266
267/*
268 * Deliver file system statistics to userspace
269 */
270static int nfs_statfs(struct dentry *dentry, struct kstatfs *buf)
271{
272 struct super_block *sb = dentry->d_sb;
273 struct nfs_server *server = NFS_SB(sb);
274 unsigned char blockbits;
275 unsigned long blockres;
276 struct nfs_fh *rootfh = NFS_FH(sb->s_root->d_inode);
277 struct nfs_fattr fattr;
278 struct nfs_fsstat res = {
279 .fattr = &fattr,
280 };
281 int error;
282
283 lock_kernel();
284
285 error = server->rpc_ops->statfs(server, rootfh, &res);
286 buf->f_type = NFS_SUPER_MAGIC;
287 if (error < 0)
288 goto out_err;
289
290 /*
291 * Current versions of glibc do not correctly handle the
292 * case where f_frsize != f_bsize. Eventually we want to
293 * report the value of wtmult in this field.
294 */
295 buf->f_frsize = sb->s_blocksize;
296
297 /*
298 * On most *nix systems, f_blocks, f_bfree, and f_bavail
299 * are reported in units of f_frsize. Linux hasn't had
300 * an f_frsize field in its statfs struct until recently,
301 * thus historically Linux's sys_statfs reports these
302 * fields in units of f_bsize.
303 */
304 buf->f_bsize = sb->s_blocksize;
305 blockbits = sb->s_blocksize_bits;
306 blockres = (1 << blockbits) - 1;
307 buf->f_blocks = (res.tbytes + blockres) >> blockbits;
308 buf->f_bfree = (res.fbytes + blockres) >> blockbits;
309 buf->f_bavail = (res.abytes + blockres) >> blockbits;
310
311 buf->f_files = res.tfiles;
312 buf->f_ffree = res.afiles;
313
314 buf->f_namelen = server->namelen;
315 out:
316 unlock_kernel();
317 return 0;
318
319 out_err:
320 dprintk("%s: statfs error = %d\n", __FUNCTION__, -error);
321 buf->f_bsize = buf->f_blocks = buf->f_bfree = buf->f_bavail = -1;
322 goto out;
323
324}
325
326static const char *nfs_pseudoflavour_to_name(rpc_authflavor_t flavour)
327{
328 static struct {
329 rpc_authflavor_t flavour;
330 const char *str;
331 } sec_flavours[] = {
332 { RPC_AUTH_NULL, "null" },
333 { RPC_AUTH_UNIX, "sys" },
334 { RPC_AUTH_GSS_KRB5, "krb5" },
335 { RPC_AUTH_GSS_KRB5I, "krb5i" },
336 { RPC_AUTH_GSS_KRB5P, "krb5p" },
337 { RPC_AUTH_GSS_LKEY, "lkey" },
338 { RPC_AUTH_GSS_LKEYI, "lkeyi" },
339 { RPC_AUTH_GSS_LKEYP, "lkeyp" },
340 { RPC_AUTH_GSS_SPKM, "spkm" },
341 { RPC_AUTH_GSS_SPKMI, "spkmi" },
342 { RPC_AUTH_GSS_SPKMP, "spkmp" },
343 { -1, "unknown" }
344 };
345 int i;
346
347 for (i=0; sec_flavours[i].flavour != -1; i++) {
348 if (sec_flavours[i].flavour == flavour)
349 break;
350 }
351 return sec_flavours[i].str;
352}
353
354/*
355 * Describe the mount options in force on this server representation
356 */
357static void nfs_show_mount_options(struct seq_file *m, struct nfs_server *nfss, int showdefaults)
358{
359 static struct proc_nfs_info {
360 int flag;
361 char *str;
362 char *nostr;
363 } nfs_info[] = {
364 { NFS_MOUNT_SOFT, ",soft", ",hard" },
365 { NFS_MOUNT_INTR, ",intr", "" },
366 { NFS_MOUNT_NOCTO, ",nocto", "" },
367 { NFS_MOUNT_NOAC, ",noac", "" },
368 { NFS_MOUNT_NONLM, ",nolock", "" },
369 { NFS_MOUNT_NOACL, ",noacl", "" },
370 { 0, NULL, NULL }
371 };
372 struct proc_nfs_info *nfs_infop;
373 char buf[12];
374 char *proto;
375
376 seq_printf(m, ",vers=%d", nfss->rpc_ops->version);
377 seq_printf(m, ",rsize=%d", nfss->rsize);
378 seq_printf(m, ",wsize=%d", nfss->wsize);
379 if (nfss->acregmin != 3*HZ || showdefaults)
380 seq_printf(m, ",acregmin=%d", nfss->acregmin/HZ);
381 if (nfss->acregmax != 60*HZ || showdefaults)
382 seq_printf(m, ",acregmax=%d", nfss->acregmax/HZ);
383 if (nfss->acdirmin != 30*HZ || showdefaults)
384 seq_printf(m, ",acdirmin=%d", nfss->acdirmin/HZ);
385 if (nfss->acdirmax != 60*HZ || showdefaults)
386 seq_printf(m, ",acdirmax=%d", nfss->acdirmax/HZ);
387 for (nfs_infop = nfs_info; nfs_infop->flag; nfs_infop++) {
388 if (nfss->flags & nfs_infop->flag)
389 seq_puts(m, nfs_infop->str);
390 else
391 seq_puts(m, nfs_infop->nostr);
392 }
393 switch (nfss->client->cl_xprt->prot) {
394 case IPPROTO_TCP:
395 proto = "tcp";
396 break;
397 case IPPROTO_UDP:
398 proto = "udp";
399 break;
400 default:
401 snprintf(buf, sizeof(buf), "%u", nfss->client->cl_xprt->prot);
402 proto = buf;
403 }
404 seq_printf(m, ",proto=%s", proto);
405 seq_printf(m, ",timeo=%lu", 10U * nfss->retrans_timeo / HZ);
406 seq_printf(m, ",retrans=%u", nfss->retrans_count);
407 seq_printf(m, ",sec=%s", nfs_pseudoflavour_to_name(nfss->client->cl_auth->au_flavor));
408}
409
410/*
411 * Describe the mount options on this VFS mountpoint
412 */
413static int nfs_show_options(struct seq_file *m, struct vfsmount *mnt)
414{
415 struct nfs_server *nfss = NFS_SB(mnt->mnt_sb);
416
417 nfs_show_mount_options(m, nfss, 0);
418
419 seq_puts(m, ",addr=");
420 seq_escape(m, nfss->hostname, " \t\n\\");
421
422 return 0;
423}
424
425/*
426 * Present statistical information for this VFS mountpoint
427 */
428static int nfs_show_stats(struct seq_file *m, struct vfsmount *mnt)
429{
430 int i, cpu;
431 struct nfs_server *nfss = NFS_SB(mnt->mnt_sb);
432 struct rpc_auth *auth = nfss->client->cl_auth;
433 struct nfs_iostats totals = { };
434
435 seq_printf(m, "statvers=%s", NFS_IOSTAT_VERS);
436
437 /*
438 * Display all mount option settings
439 */
440 seq_printf(m, "\n\topts:\t");
441 seq_puts(m, mnt->mnt_sb->s_flags & MS_RDONLY ? "ro" : "rw");
442 seq_puts(m, mnt->mnt_sb->s_flags & MS_SYNCHRONOUS ? ",sync" : "");
443 seq_puts(m, mnt->mnt_sb->s_flags & MS_NOATIME ? ",noatime" : "");
444 seq_puts(m, mnt->mnt_sb->s_flags & MS_NODIRATIME ? ",nodiratime" : "");
445 nfs_show_mount_options(m, nfss, 1);
446
447 seq_printf(m, "\n\tage:\t%lu", (jiffies - nfss->mount_time) / HZ);
448
449 seq_printf(m, "\n\tcaps:\t");
450 seq_printf(m, "caps=0x%x", nfss->caps);
451 seq_printf(m, ",wtmult=%d", nfss->wtmult);
452 seq_printf(m, ",dtsize=%d", nfss->dtsize);
453 seq_printf(m, ",bsize=%d", nfss->bsize);
454 seq_printf(m, ",namelen=%d", nfss->namelen);
455
456#ifdef CONFIG_NFS_V4
457 if (nfss->rpc_ops->version == 4) {
458 seq_printf(m, "\n\tnfsv4:\t");
459 seq_printf(m, "bm0=0x%x", nfss->attr_bitmask[0]);
460 seq_printf(m, ",bm1=0x%x", nfss->attr_bitmask[1]);
461 seq_printf(m, ",acl=0x%x", nfss->acl_bitmask);
462 }
463#endif
464
465 /*
466 * Display security flavor in effect for this mount
467 */
468 seq_printf(m, "\n\tsec:\tflavor=%d", auth->au_ops->au_flavor);
469 if (auth->au_flavor)
470 seq_printf(m, ",pseudoflavor=%d", auth->au_flavor);
471
472 /*
473 * Display superblock I/O counters
474 */
475 for_each_possible_cpu(cpu) {
476 struct nfs_iostats *stats;
477
478 preempt_disable();
479 stats = per_cpu_ptr(nfss->io_stats, cpu);
480
481 for (i = 0; i < __NFSIOS_COUNTSMAX; i++)
482 totals.events[i] += stats->events[i];
483 for (i = 0; i < __NFSIOS_BYTESMAX; i++)
484 totals.bytes[i] += stats->bytes[i];
485
486 preempt_enable();
487 }
488
489 seq_printf(m, "\n\tevents:\t");
490 for (i = 0; i < __NFSIOS_COUNTSMAX; i++)
491 seq_printf(m, "%lu ", totals.events[i]);
492 seq_printf(m, "\n\tbytes:\t");
493 for (i = 0; i < __NFSIOS_BYTESMAX; i++)
494 seq_printf(m, "%Lu ", totals.bytes[i]);
495 seq_printf(m, "\n");
496
497 rpc_print_iostats(m, nfss->client);
498
499 return 0;
500}
501
502/*
503 * Begin unmount by attempting to remove all automounted mountpoints we added
504 * in response to traversals
505 */
506static void nfs_umount_begin(struct vfsmount *vfsmnt, int flags)
507{
508 struct nfs_server *server;
509 struct rpc_clnt *rpc;
510
511 shrink_submounts(vfsmnt, &nfs_automount_list);
512 if (!(flags & MNT_FORCE))
513 return;
514 /* -EIO all pending I/O */
515 server = NFS_SB(vfsmnt->mnt_sb);
516 rpc = server->client;
517 if (!IS_ERR(rpc))
518 rpc_killall_tasks(rpc);
519 rpc = server->client_acl;
520 if (!IS_ERR(rpc))
521 rpc_killall_tasks(rpc);
522}
523
524/*
525 * Obtain the root inode of the file system.
526 */
527static struct inode *
528nfs_get_root(struct super_block *sb, struct nfs_fh *rootfh, struct nfs_fsinfo *fsinfo)
529{
530 struct nfs_server *server = NFS_SB(sb);
531 int error;
532
533 error = server->rpc_ops->getroot(server, rootfh, fsinfo);
534 if (error < 0) {
535 dprintk("nfs_get_root: getattr error = %d\n", -error);
536 return ERR_PTR(error);
537 }
538
539 server->fsid = fsinfo->fattr->fsid;
540 return nfs_fhget(sb, rootfh, fsinfo->fattr);
541}
542
543/*
544 * Do NFS version-independent mount processing, and sanity checking
545 */
546static int
547nfs_sb_init(struct super_block *sb, rpc_authflavor_t authflavor)
548{
549 struct nfs_server *server;
550 struct inode *root_inode;
551 struct nfs_fattr fattr;
552 struct nfs_fsinfo fsinfo = {
553 .fattr = &fattr,
554 };
555 struct nfs_pathconf pathinfo = {
556 .fattr = &fattr,
557 };
558 int no_root_error = 0;
559 unsigned long max_rpc_payload;
560
561 /* We probably want something more informative here */
562 snprintf(sb->s_id, sizeof(sb->s_id), "%x:%x", MAJOR(sb->s_dev), MINOR(sb->s_dev));
563
564 server = NFS_SB(sb);
565
566 sb->s_magic = NFS_SUPER_MAGIC;
567
568 server->io_stats = nfs_alloc_iostats();
569 if (server->io_stats == NULL)
570 return -ENOMEM;
571
572 root_inode = nfs_get_root(sb, &server->fh, &fsinfo);
573 /* Did getting the root inode fail? */
574 if (IS_ERR(root_inode)) {
575 no_root_error = PTR_ERR(root_inode);
576 goto out_no_root;
577 }
578 sb->s_root = d_alloc_root(root_inode);
579 if (!sb->s_root) {
580 no_root_error = -ENOMEM;
581 goto out_no_root;
582 }
583 sb->s_root->d_op = server->rpc_ops->dentry_ops;
584
585 /* mount time stamp, in seconds */
586 server->mount_time = jiffies;
587
588 /* Get some general file system info */
589 if (server->namelen == 0 &&
590 server->rpc_ops->pathconf(server, &server->fh, &pathinfo) >= 0)
591 server->namelen = pathinfo.max_namelen;
592 /* Work out a lot of parameters */
593 if (server->rsize == 0)
594 server->rsize = nfs_block_size(fsinfo.rtpref, NULL);
595 if (server->wsize == 0)
596 server->wsize = nfs_block_size(fsinfo.wtpref, NULL);
597
598 if (fsinfo.rtmax >= 512 && server->rsize > fsinfo.rtmax)
599 server->rsize = nfs_block_size(fsinfo.rtmax, NULL);
600 if (fsinfo.wtmax >= 512 && server->wsize > fsinfo.wtmax)
601 server->wsize = nfs_block_size(fsinfo.wtmax, NULL);
602
603 max_rpc_payload = nfs_block_size(rpc_max_payload(server->client), NULL);
604 if (server->rsize > max_rpc_payload)
605 server->rsize = max_rpc_payload;
606 if (server->rsize > NFS_MAX_FILE_IO_SIZE)
607 server->rsize = NFS_MAX_FILE_IO_SIZE;
608 server->rpages = (server->rsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
609
610 if (server->wsize > max_rpc_payload)
611 server->wsize = max_rpc_payload;
612 if (server->wsize > NFS_MAX_FILE_IO_SIZE)
613 server->wsize = NFS_MAX_FILE_IO_SIZE;
614 server->wpages = (server->wsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
615
616 if (sb->s_blocksize == 0)
617 sb->s_blocksize = nfs_block_bits(server->wsize,
618 &sb->s_blocksize_bits);
619 server->wtmult = nfs_block_bits(fsinfo.wtmult, NULL);
620
621 server->dtsize = nfs_block_size(fsinfo.dtpref, NULL);
622 if (server->dtsize > PAGE_CACHE_SIZE)
623 server->dtsize = PAGE_CACHE_SIZE;
624 if (server->dtsize > server->rsize)
625 server->dtsize = server->rsize;
626
627 if (server->flags & NFS_MOUNT_NOAC) {
628 server->acregmin = server->acregmax = 0;
629 server->acdirmin = server->acdirmax = 0;
630 sb->s_flags |= MS_SYNCHRONOUS;
631 }
632 server->backing_dev_info.ra_pages = server->rpages * NFS_MAX_READAHEAD;
633
634 nfs_super_set_maxbytes(sb, fsinfo.maxfilesize);
635
636 server->client->cl_intr = (server->flags & NFS_MOUNT_INTR) ? 1 : 0;
637 server->client->cl_softrtry = (server->flags & NFS_MOUNT_SOFT) ? 1 : 0;
638
639 /* We're airborne Set socket buffersize */
640 rpc_setbufsize(server->client, server->wsize + 100, server->rsize + 100);
641 return 0;
642 /* Yargs. It didn't work out. */
643out_no_root:
644 dprintk("nfs_sb_init: get root inode failed: errno %d\n", -no_root_error);
645 if (!IS_ERR(root_inode))
646 iput(root_inode);
647 return no_root_error;
648}
649
650/*
651 * Initialise the timeout values for a connection
652 */
653static void nfs_init_timeout_values(struct rpc_timeout *to, int proto, unsigned int timeo, unsigned int retrans)
654{
655 to->to_initval = timeo * HZ / 10;
656 to->to_retries = retrans;
657 if (!to->to_retries)
658 to->to_retries = 2;
659
660 switch (proto) {
661 case IPPROTO_TCP:
662 if (!to->to_initval)
663 to->to_initval = 60 * HZ;
664 if (to->to_initval > NFS_MAX_TCP_TIMEOUT)
665 to->to_initval = NFS_MAX_TCP_TIMEOUT;
666 to->to_increment = to->to_initval;
667 to->to_maxval = to->to_initval + (to->to_increment * to->to_retries);
668 to->to_exponential = 0;
669 break;
670 case IPPROTO_UDP:
671 default:
672 if (!to->to_initval)
673 to->to_initval = 11 * HZ / 10;
674 if (to->to_initval > NFS_MAX_UDP_TIMEOUT)
675 to->to_initval = NFS_MAX_UDP_TIMEOUT;
676 to->to_maxval = NFS_MAX_UDP_TIMEOUT;
677 to->to_exponential = 1;
678 break;
679 }
680}
681
682/*
683 * Create an RPC client handle.
684 */
685static struct rpc_clnt *
686nfs_create_client(struct nfs_server *server, const struct nfs_mount_data *data)
687{
688 struct rpc_timeout timeparms;
689 struct rpc_xprt *xprt = NULL;
690 struct rpc_clnt *clnt = NULL;
691 int proto = (data->flags & NFS_MOUNT_TCP) ? IPPROTO_TCP : IPPROTO_UDP;
692
693 nfs_init_timeout_values(&timeparms, proto, data->timeo, data->retrans);
694
695 server->retrans_timeo = timeparms.to_initval;
696 server->retrans_count = timeparms.to_retries;
697
698 /* create transport and client */
699 xprt = xprt_create_proto(proto, &server->addr, &timeparms);
700 if (IS_ERR(xprt)) {
701 dprintk("%s: cannot create RPC transport. Error = %ld\n",
702 __FUNCTION__, PTR_ERR(xprt));
703 return (struct rpc_clnt *)xprt;
704 }
705 clnt = rpc_create_client(xprt, server->hostname, &nfs_program,
706 server->rpc_ops->version, data->pseudoflavor);
707 if (IS_ERR(clnt)) {
708 dprintk("%s: cannot create RPC client. Error = %ld\n",
709 __FUNCTION__, PTR_ERR(xprt));
710 goto out_fail;
711 }
712
713 clnt->cl_intr = 1;
714 clnt->cl_softrtry = 1;
715
716 return clnt;
717
718out_fail:
719 return clnt;
720}
721
722/*
723 * Clone a server record
724 */
725static struct nfs_server *nfs_clone_server(struct super_block *sb, struct nfs_clone_mount *data)
726{
727 struct nfs_server *server = NFS_SB(sb);
728 struct nfs_server *parent = NFS_SB(data->sb);
729 struct inode *root_inode;
730 struct nfs_fsinfo fsinfo;
731 void *err = ERR_PTR(-ENOMEM);
732
733 sb->s_op = data->sb->s_op;
734 sb->s_blocksize = data->sb->s_blocksize;
735 sb->s_blocksize_bits = data->sb->s_blocksize_bits;
736 sb->s_maxbytes = data->sb->s_maxbytes;
737
738 server->client_sys = server->client_acl = ERR_PTR(-EINVAL);
739 server->io_stats = nfs_alloc_iostats();
740 if (server->io_stats == NULL)
741 goto out;
742
743 server->client = rpc_clone_client(parent->client);
744 if (IS_ERR((err = server->client)))
745 goto out;
746
747 if (!IS_ERR(parent->client_sys)) {
748 server->client_sys = rpc_clone_client(parent->client_sys);
749 if (IS_ERR((err = server->client_sys)))
750 goto out;
751 }
752 if (!IS_ERR(parent->client_acl)) {
753 server->client_acl = rpc_clone_client(parent->client_acl);
754 if (IS_ERR((err = server->client_acl)))
755 goto out;
756 }
757 root_inode = nfs_fhget(sb, data->fh, data->fattr);
758 if (!root_inode)
759 goto out;
760 sb->s_root = d_alloc_root(root_inode);
761 if (!sb->s_root)
762 goto out_put_root;
763 fsinfo.fattr = data->fattr;
764 if (NFS_PROTO(root_inode)->fsinfo(server, data->fh, &fsinfo) == 0)
765 nfs_super_set_maxbytes(sb, fsinfo.maxfilesize);
766 sb->s_root->d_op = server->rpc_ops->dentry_ops;
767 sb->s_flags |= MS_ACTIVE;
768 return server;
769out_put_root:
770 iput(root_inode);
771out:
772 return err;
773}
774
775/*
776 * Copy an existing superblock and attach revised data
777 */
778static int nfs_clone_generic_sb(struct nfs_clone_mount *data,
779 struct super_block *(*fill_sb)(struct nfs_server *, struct nfs_clone_mount *),
780 struct nfs_server *(*fill_server)(struct super_block *, struct nfs_clone_mount *),
781 struct vfsmount *mnt)
782{
783 struct nfs_server *server;
784 struct nfs_server *parent = NFS_SB(data->sb);
785 struct super_block *sb = ERR_PTR(-EINVAL);
786 char *hostname;
787 int error = -ENOMEM;
788 int len;
789
790 server = kmalloc(sizeof(struct nfs_server), GFP_KERNEL);
791 if (server == NULL)
792 goto out_err;
793 memcpy(server, parent, sizeof(*server));
794 hostname = (data->hostname != NULL) ? data->hostname : parent->hostname;
795 len = strlen(hostname) + 1;
796 server->hostname = kmalloc(len, GFP_KERNEL);
797 if (server->hostname == NULL)
798 goto free_server;
799 memcpy(server->hostname, hostname, len);
800 error = rpciod_up();
801 if (error != 0)
802 goto free_hostname;
803
804 sb = fill_sb(server, data);
805 if (IS_ERR(sb)) {
806 error = PTR_ERR(sb);
807 goto kill_rpciod;
808 }
809
810 if (sb->s_root)
811 goto out_rpciod_down;
812
813 server = fill_server(sb, data);
814 if (IS_ERR(server)) {
815 error = PTR_ERR(server);
816 goto out_deactivate;
817 }
818 return simple_set_mnt(mnt, sb);
819out_deactivate:
820 up_write(&sb->s_umount);
821 deactivate_super(sb);
822 return error;
823out_rpciod_down:
824 rpciod_down();
825 kfree(server->hostname);
826 kfree(server);
827 return simple_set_mnt(mnt, sb);
828kill_rpciod:
829 rpciod_down();
830free_hostname:
831 kfree(server->hostname);
832free_server:
833 kfree(server);
834out_err:
835 return error;
836}
837
838/*
839 * Set up an NFS2/3 superblock
840 *
841 * The way this works is that the mount process passes a structure
842 * in the data argument which contains the server's IP address
843 * and the root file handle obtained from the server's mount
844 * daemon. We stash these away in the private superblock fields.
845 */
846static int
847nfs_fill_super(struct super_block *sb, struct nfs_mount_data *data, int silent)
848{
849 struct nfs_server *server;
850 rpc_authflavor_t authflavor;
851
852 server = NFS_SB(sb);
853 sb->s_blocksize_bits = 0;
854 sb->s_blocksize = 0;
855 if (data->bsize)
856 sb->s_blocksize = nfs_block_size(data->bsize, &sb->s_blocksize_bits);
857 if (data->rsize)
858 server->rsize = nfs_block_size(data->rsize, NULL);
859 if (data->wsize)
860 server->wsize = nfs_block_size(data->wsize, NULL);
861 server->flags = data->flags & NFS_MOUNT_FLAGMASK;
862
863 server->acregmin = data->acregmin*HZ;
864 server->acregmax = data->acregmax*HZ;
865 server->acdirmin = data->acdirmin*HZ;
866 server->acdirmax = data->acdirmax*HZ;
867
868 /* Start lockd here, before we might error out */
869 if (!(server->flags & NFS_MOUNT_NONLM))
870 lockd_up();
871
872 server->namelen = data->namlen;
873 server->hostname = kmalloc(strlen(data->hostname) + 1, GFP_KERNEL);
874 if (!server->hostname)
875 return -ENOMEM;
876 strcpy(server->hostname, data->hostname);
877
878 /* Check NFS protocol revision and initialize RPC op vector
879 * and file handle pool. */
880#ifdef CONFIG_NFS_V3
881 if (server->flags & NFS_MOUNT_VER3) {
882 server->rpc_ops = &nfs_v3_clientops;
883 server->caps |= NFS_CAP_READDIRPLUS;
884 } else {
885 server->rpc_ops = &nfs_v2_clientops;
886 }
887#else
888 server->rpc_ops = &nfs_v2_clientops;
889#endif
890
891 /* Fill in pseudoflavor for mount version < 5 */
892 if (!(data->flags & NFS_MOUNT_SECFLAVOUR))
893 data->pseudoflavor = RPC_AUTH_UNIX;
894 authflavor = data->pseudoflavor; /* save for sb_init() */
895 /* XXX maybe we want to add a server->pseudoflavor field */
896
897 /* Create RPC client handles */
898 server->client = nfs_create_client(server, data);
899 if (IS_ERR(server->client))
900 return PTR_ERR(server->client);
901 /* RFC 2623, sec 2.3.2 */
902 if (authflavor != RPC_AUTH_UNIX) {
903 struct rpc_auth *auth;
904
905 server->client_sys = rpc_clone_client(server->client);
906 if (IS_ERR(server->client_sys))
907 return PTR_ERR(server->client_sys);
908 auth = rpcauth_create(RPC_AUTH_UNIX, server->client_sys);
909 if (IS_ERR(auth))
910 return PTR_ERR(auth);
911 } else {
912 atomic_inc(&server->client->cl_count);
913 server->client_sys = server->client;
914 }
915 if (server->flags & NFS_MOUNT_VER3) {
916#ifdef CONFIG_NFS_V3_ACL
917 if (!(server->flags & NFS_MOUNT_NOACL)) {
918 server->client_acl = rpc_bind_new_program(server->client, &nfsacl_program, 3);
919 /* No errors! Assume that Sun nfsacls are supported */
920 if (!IS_ERR(server->client_acl))
921 server->caps |= NFS_CAP_ACLS;
922 }
923#else
924 server->flags &= ~NFS_MOUNT_NOACL;
925#endif /* CONFIG_NFS_V3_ACL */
926 /*
927 * The VFS shouldn't apply the umask to mode bits. We will
928 * do so ourselves when necessary.
929 */
930 sb->s_flags |= MS_POSIXACL;
931 if (server->namelen == 0 || server->namelen > NFS3_MAXNAMLEN)
932 server->namelen = NFS3_MAXNAMLEN;
933 sb->s_time_gran = 1;
934 } else {
935 if (server->namelen == 0 || server->namelen > NFS2_MAXNAMLEN)
936 server->namelen = NFS2_MAXNAMLEN;
937 }
938
939 sb->s_op = &nfs_sops;
940 return nfs_sb_init(sb, authflavor);
941}
942
943static int nfs_set_super(struct super_block *s, void *data)
944{
945 s->s_fs_info = data;
946 return set_anon_super(s, data);
947}
948
949static int nfs_compare_super(struct super_block *sb, void *data)
950{
951 struct nfs_server *server = data;
952 struct nfs_server *old = NFS_SB(sb);
953
954 if (old->addr.sin_addr.s_addr != server->addr.sin_addr.s_addr)
955 return 0;
956 if (old->addr.sin_port != server->addr.sin_port)
957 return 0;
958 return !nfs_compare_fh(&old->fh, &server->fh);
959}
960
961static int nfs_get_sb(struct file_system_type *fs_type,
962 int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt)
963{
964 int error;
965 struct nfs_server *server = NULL;
966 struct super_block *s;
967 struct nfs_fh *root;
968 struct nfs_mount_data *data = raw_data;
969
970 error = -EINVAL;
971 if (data == NULL) {
972 dprintk("%s: missing data argument\n", __FUNCTION__);
973 goto out_err_noserver;
974 }
975 if (data->version <= 0 || data->version > NFS_MOUNT_VERSION) {
976 dprintk("%s: bad mount version\n", __FUNCTION__);
977 goto out_err_noserver;
978 }
979 switch (data->version) {
980 case 1:
981 data->namlen = 0;
982 case 2:
983 data->bsize = 0;
984 case 3:
985 if (data->flags & NFS_MOUNT_VER3) {
986 dprintk("%s: mount structure version %d does not support NFSv3\n",
987 __FUNCTION__,
988 data->version);
989 goto out_err_noserver;
990 }
991 data->root.size = NFS2_FHSIZE;
992 memcpy(data->root.data, data->old_root.data, NFS2_FHSIZE);
993 case 4:
994 if (data->flags & NFS_MOUNT_SECFLAVOUR) {
995 dprintk("%s: mount structure version %d does not support strong security\n",
996 __FUNCTION__,
997 data->version);
998 goto out_err_noserver;
999 }
1000 case 5:
1001 memset(data->context, 0, sizeof(data->context));
1002 }
1003#ifndef CONFIG_NFS_V3
1004 /* If NFSv3 is not compiled in, return -EPROTONOSUPPORT */
1005 error = -EPROTONOSUPPORT;
1006 if (data->flags & NFS_MOUNT_VER3) {
1007 dprintk("%s: NFSv3 not compiled into kernel\n", __FUNCTION__);
1008 goto out_err_noserver;
1009 }
1010#endif /* CONFIG_NFS_V3 */
1011
1012 error = -ENOMEM;
1013 server = kzalloc(sizeof(struct nfs_server), GFP_KERNEL);
1014 if (!server)
1015 goto out_err_noserver;
1016 /* Zero out the NFS state stuff */
1017 init_nfsv4_state(server);
1018 server->client = server->client_sys = server->client_acl = ERR_PTR(-EINVAL);
1019
1020 root = &server->fh;
1021 if (data->flags & NFS_MOUNT_VER3)
1022 root->size = data->root.size;
1023 else
1024 root->size = NFS2_FHSIZE;
1025 error = -EINVAL;
1026 if (root->size > sizeof(root->data)) {
1027 dprintk("%s: invalid root filehandle\n", __FUNCTION__);
1028 goto out_err;
1029 }
1030 memcpy(root->data, data->root.data, root->size);
1031
1032 /* We now require that the mount process passes the remote address */
1033 memcpy(&server->addr, &data->addr, sizeof(server->addr));
1034 if (server->addr.sin_addr.s_addr == INADDR_ANY) {
1035 dprintk("%s: mount program didn't pass remote address!\n",
1036 __FUNCTION__);
1037 goto out_err;
1038 }
1039
1040 /* Fire up rpciod if not yet running */
1041 error = rpciod_up();
1042 if (error < 0) {
1043 dprintk("%s: couldn't start rpciod! Error = %d\n",
1044 __FUNCTION__, error);
1045 goto out_err;
1046 }
1047
1048 s = sget(fs_type, nfs_compare_super, nfs_set_super, server);
1049 if (IS_ERR(s)) {
1050 error = PTR_ERR(s);
1051 goto out_err_rpciod;
1052 }
1053
1054 if (s->s_root)
1055 goto out_rpciod_down;
1056
1057 s->s_flags = flags;
1058
1059 error = nfs_fill_super(s, data, flags & MS_SILENT ? 1 : 0);
1060 if (error) {
1061 up_write(&s->s_umount);
1062 deactivate_super(s);
1063 return error;
1064 }
1065 s->s_flags |= MS_ACTIVE;
1066 return simple_set_mnt(mnt, s);
1067
1068out_rpciod_down:
1069 rpciod_down();
1070 kfree(server);
1071 return simple_set_mnt(mnt, s);
1072
1073out_err_rpciod:
1074 rpciod_down();
1075out_err:
1076 kfree(server);
1077out_err_noserver:
1078 return error;
1079}
1080
1081static void nfs_kill_super(struct super_block *s)
1082{
1083 struct nfs_server *server = NFS_SB(s);
1084
1085 kill_anon_super(s);
1086
1087 if (!IS_ERR(server->client))
1088 rpc_shutdown_client(server->client);
1089 if (!IS_ERR(server->client_sys))
1090 rpc_shutdown_client(server->client_sys);
1091 if (!IS_ERR(server->client_acl))
1092 rpc_shutdown_client(server->client_acl);
1093
1094 if (!(server->flags & NFS_MOUNT_NONLM))
1095 lockd_down(); /* release rpc.lockd */
1096
1097 rpciod_down(); /* release rpciod */
1098
1099 nfs_free_iostats(server->io_stats);
1100 kfree(server->hostname);
1101 kfree(server);
1102 nfs_release_automount_timer();
1103}
1104
1105static struct super_block *nfs_clone_sb(struct nfs_server *server, struct nfs_clone_mount *data)
1106{
1107 struct super_block *sb;
1108
1109 server->fsid = data->fattr->fsid;
1110 nfs_copy_fh(&server->fh, data->fh);
1111 sb = sget(&nfs_fs_type, nfs_compare_super, nfs_set_super, server);
1112 if (!IS_ERR(sb) && sb->s_root == NULL && !(server->flags & NFS_MOUNT_NONLM))
1113 lockd_up();
1114 return sb;
1115}
1116
1117static int nfs_clone_nfs_sb(struct file_system_type *fs_type,
1118 int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt)
1119{
1120 struct nfs_clone_mount *data = raw_data;
1121 return nfs_clone_generic_sb(data, nfs_clone_sb, nfs_clone_server, mnt);
1122}
1123
1124#ifdef CONFIG_NFS_V4
1125static struct rpc_clnt *nfs4_create_client(struct nfs_server *server,
1126 struct rpc_timeout *timeparms, int proto, rpc_authflavor_t flavor)
1127{
1128 struct nfs4_client *clp;
1129 struct rpc_xprt *xprt = NULL;
1130 struct rpc_clnt *clnt = NULL;
1131 int err = -EIO;
1132
1133 clp = nfs4_get_client(&server->addr.sin_addr);
1134 if (!clp) {
1135 dprintk("%s: failed to create NFS4 client.\n", __FUNCTION__);
1136 return ERR_PTR(err);
1137 }
1138
1139 /* Now create transport and client */
1140 down_write(&clp->cl_sem);
1141 if (IS_ERR(clp->cl_rpcclient)) {
1142 xprt = xprt_create_proto(proto, &server->addr, timeparms);
1143 if (IS_ERR(xprt)) {
1144 up_write(&clp->cl_sem);
1145 err = PTR_ERR(xprt);
1146 dprintk("%s: cannot create RPC transport. Error = %d\n",
1147 __FUNCTION__, err);
1148 goto out_fail;
1149 }
1150 /* Bind to a reserved port! */
1151 xprt->resvport = 1;
1152 clnt = rpc_create_client(xprt, server->hostname, &nfs_program,
1153 server->rpc_ops->version, flavor);
1154 if (IS_ERR(clnt)) {
1155 up_write(&clp->cl_sem);
1156 err = PTR_ERR(clnt);
1157 dprintk("%s: cannot create RPC client. Error = %d\n",
1158 __FUNCTION__, err);
1159 goto out_fail;
1160 }
1161 clnt->cl_intr = 1;
1162 clnt->cl_softrtry = 1;
1163 clp->cl_rpcclient = clnt;
1164 memcpy(clp->cl_ipaddr, server->ip_addr, sizeof(clp->cl_ipaddr));
1165 nfs_idmap_new(clp);
1166 }
1167 list_add_tail(&server->nfs4_siblings, &clp->cl_superblocks);
1168 clnt = rpc_clone_client(clp->cl_rpcclient);
1169 if (!IS_ERR(clnt))
1170 server->nfs4_state = clp;
1171 up_write(&clp->cl_sem);
1172 clp = NULL;
1173
1174 if (IS_ERR(clnt)) {
1175 dprintk("%s: cannot create RPC client. Error = %d\n",
1176 __FUNCTION__, err);
1177 return clnt;
1178 }
1179
1180 if (server->nfs4_state->cl_idmap == NULL) {
1181 dprintk("%s: failed to create idmapper.\n", __FUNCTION__);
1182 return ERR_PTR(-ENOMEM);
1183 }
1184
1185 if (clnt->cl_auth->au_flavor != flavor) {
1186 struct rpc_auth *auth;
1187
1188 auth = rpcauth_create(flavor, clnt);
1189 if (IS_ERR(auth)) {
1190 dprintk("%s: couldn't create credcache!\n", __FUNCTION__);
1191 return (struct rpc_clnt *)auth;
1192 }
1193 }
1194 return clnt;
1195
1196 out_fail:
1197 if (clp)
1198 nfs4_put_client(clp);
1199 return ERR_PTR(err);
1200}
1201
1202/*
1203 * Set up an NFS4 superblock
1204 */
1205static int nfs4_fill_super(struct super_block *sb, struct nfs4_mount_data *data, int silent)
1206{
1207 struct nfs_server *server;
1208 struct rpc_timeout timeparms;
1209 rpc_authflavor_t authflavour;
1210 int err = -EIO;
1211
1212 sb->s_blocksize_bits = 0;
1213 sb->s_blocksize = 0;
1214 server = NFS_SB(sb);
1215 if (data->rsize != 0)
1216 server->rsize = nfs_block_size(data->rsize, NULL);
1217 if (data->wsize != 0)
1218 server->wsize = nfs_block_size(data->wsize, NULL);
1219 server->flags = data->flags & NFS_MOUNT_FLAGMASK;
1220 server->caps = NFS_CAP_ATOMIC_OPEN;
1221
1222 server->acregmin = data->acregmin*HZ;
1223 server->acregmax = data->acregmax*HZ;
1224 server->acdirmin = data->acdirmin*HZ;
1225 server->acdirmax = data->acdirmax*HZ;
1226
1227 server->rpc_ops = &nfs_v4_clientops;
1228
1229 nfs_init_timeout_values(&timeparms, data->proto, data->timeo, data->retrans);
1230
1231 server->retrans_timeo = timeparms.to_initval;
1232 server->retrans_count = timeparms.to_retries;
1233
1234 /* Now create transport and client */
1235 authflavour = RPC_AUTH_UNIX;
1236 if (data->auth_flavourlen != 0) {
1237 if (data->auth_flavourlen != 1) {
1238 dprintk("%s: Invalid number of RPC auth flavours %d.\n",
1239 __FUNCTION__, data->auth_flavourlen);
1240 err = -EINVAL;
1241 goto out_fail;
1242 }
1243 if (copy_from_user(&authflavour, data->auth_flavours, sizeof(authflavour))) {
1244 err = -EFAULT;
1245 goto out_fail;
1246 }
1247 }
1248
1249 server->client = nfs4_create_client(server, &timeparms, data->proto, authflavour);
1250 if (IS_ERR(server->client)) {
1251 err = PTR_ERR(server->client);
1252 dprintk("%s: cannot create RPC client. Error = %d\n",
1253 __FUNCTION__, err);
1254 goto out_fail;
1255 }
1256
1257 sb->s_time_gran = 1;
1258
1259 sb->s_op = &nfs4_sops;
1260 err = nfs_sb_init(sb, authflavour);
1261
1262 out_fail:
1263 return err;
1264}
1265
1266static int nfs4_compare_super(struct super_block *sb, void *data)
1267{
1268 struct nfs_server *server = data;
1269 struct nfs_server *old = NFS_SB(sb);
1270
1271 if (strcmp(server->hostname, old->hostname) != 0)
1272 return 0;
1273 if (strcmp(server->mnt_path, old->mnt_path) != 0)
1274 return 0;
1275 return 1;
1276}
1277
1278static void *
1279nfs_copy_user_string(char *dst, struct nfs_string *src, int maxlen)
1280{
1281 void *p = NULL;
1282
1283 if (!src->len)
1284 return ERR_PTR(-EINVAL);
1285 if (src->len < maxlen)
1286 maxlen = src->len;
1287 if (dst == NULL) {
1288 p = dst = kmalloc(maxlen + 1, GFP_KERNEL);
1289 if (p == NULL)
1290 return ERR_PTR(-ENOMEM);
1291 }
1292 if (copy_from_user(dst, src->data, maxlen)) {
1293 kfree(p);
1294 return ERR_PTR(-EFAULT);
1295 }
1296 dst[maxlen] = '\0';
1297 return dst;
1298}
1299
1300static int nfs4_get_sb(struct file_system_type *fs_type,
1301 int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt)
1302{
1303 int error;
1304 struct nfs_server *server;
1305 struct super_block *s;
1306 struct nfs4_mount_data *data = raw_data;
1307 void *p;
1308
1309 if (data == NULL) {
1310 dprintk("%s: missing data argument\n", __FUNCTION__);
1311 return -EINVAL;
1312 }
1313 if (data->version <= 0 || data->version > NFS4_MOUNT_VERSION) {
1314 dprintk("%s: bad mount version\n", __FUNCTION__);
1315 return -EINVAL;
1316 }
1317
1318 server = kzalloc(sizeof(struct nfs_server), GFP_KERNEL);
1319 if (!server)
1320 return -ENOMEM;
1321 /* Zero out the NFS state stuff */
1322 init_nfsv4_state(server);
1323 server->client = server->client_sys = server->client_acl = ERR_PTR(-EINVAL);
1324
1325 p = nfs_copy_user_string(NULL, &data->hostname, 256);
1326 if (IS_ERR(p))
1327 goto out_err;
1328 server->hostname = p;
1329
1330 p = nfs_copy_user_string(NULL, &data->mnt_path, 1024);
1331 if (IS_ERR(p))
1332 goto out_err;
1333 server->mnt_path = p;
1334
1335 p = nfs_copy_user_string(server->ip_addr, &data->client_addr,
1336 sizeof(server->ip_addr) - 1);
1337 if (IS_ERR(p))
1338 goto out_err;
1339
1340 /* We now require that the mount process passes the remote address */
1341 if (data->host_addrlen != sizeof(server->addr)) {
1342 error = -EINVAL;
1343 goto out_free;
1344 }
1345 if (copy_from_user(&server->addr, data->host_addr, sizeof(server->addr))) {
1346 error = -EFAULT;
1347 goto out_free;
1348 }
1349 if (server->addr.sin_family != AF_INET ||
1350 server->addr.sin_addr.s_addr == INADDR_ANY) {
1351 dprintk("%s: mount program didn't pass remote IP address!\n",
1352 __FUNCTION__);
1353 error = -EINVAL;
1354 goto out_free;
1355 }
1356
1357 /* Fire up rpciod if not yet running */
1358 error = rpciod_up();
1359 if (error < 0) {
1360 dprintk("%s: couldn't start rpciod! Error = %d\n",
1361 __FUNCTION__, error);
1362 goto out_free;
1363 }
1364
1365 s = sget(fs_type, nfs4_compare_super, nfs_set_super, server);
1366
1367 if (IS_ERR(s)) {
1368 error = PTR_ERR(s);
1369 goto out_free;
1370 }
1371
1372 if (s->s_root) {
1373 kfree(server->mnt_path);
1374 kfree(server->hostname);
1375 kfree(server);
1376 return simple_set_mnt(mnt, s);
1377 }
1378
1379 s->s_flags = flags;
1380
1381 error = nfs4_fill_super(s, data, flags & MS_SILENT ? 1 : 0);
1382 if (error) {
1383 up_write(&s->s_umount);
1384 deactivate_super(s);
1385 return error;
1386 }
1387 s->s_flags |= MS_ACTIVE;
1388 return simple_set_mnt(mnt, s);
1389out_err:
1390 error = PTR_ERR(p);
1391out_free:
1392 kfree(server->mnt_path);
1393 kfree(server->hostname);
1394 kfree(server);
1395 return error;
1396}
1397
1398static void nfs4_kill_super(struct super_block *sb)
1399{
1400 struct nfs_server *server = NFS_SB(sb);
1401
1402 nfs_return_all_delegations(sb);
1403 kill_anon_super(sb);
1404
1405 nfs4_renewd_prepare_shutdown(server);
1406
1407 if (server->client != NULL && !IS_ERR(server->client))
1408 rpc_shutdown_client(server->client);
1409
1410 destroy_nfsv4_state(server);
1411
1412 rpciod_down();
1413
1414 nfs_free_iostats(server->io_stats);
1415 kfree(server->hostname);
1416 kfree(server);
1417 nfs_release_automount_timer();
1418}
1419
1420/*
1421 * Constructs the SERVER-side path
1422 */
1423static inline char *nfs4_dup_path(const struct dentry *dentry)
1424{
1425 char *page = (char *) __get_free_page(GFP_USER);
1426 char *path;
1427
1428 path = nfs4_path(dentry, page, PAGE_SIZE);
1429 if (!IS_ERR(path)) {
1430 int len = PAGE_SIZE + page - path;
1431 char *tmp = path;
1432
1433 path = kmalloc(len, GFP_KERNEL);
1434 if (path)
1435 memcpy(path, tmp, len);
1436 else
1437 path = ERR_PTR(-ENOMEM);
1438 }
1439 free_page((unsigned long)page);
1440 return path;
1441}
1442
1443static struct super_block *nfs4_clone_sb(struct nfs_server *server, struct nfs_clone_mount *data)
1444{
1445 const struct dentry *dentry = data->dentry;
1446 struct nfs4_client *clp = server->nfs4_state;
1447 struct super_block *sb;
1448
1449 server->fsid = data->fattr->fsid;
1450 nfs_copy_fh(&server->fh, data->fh);
1451 server->mnt_path = nfs4_dup_path(dentry);
1452 if (IS_ERR(server->mnt_path)) {
1453 sb = (struct super_block *)server->mnt_path;
1454 goto err;
1455 }
1456 sb = sget(&nfs4_fs_type, nfs4_compare_super, nfs_set_super, server);
1457 if (IS_ERR(sb) || sb->s_root)
1458 goto free_path;
1459 nfs4_server_capabilities(server, &server->fh);
1460
1461 down_write(&clp->cl_sem);
1462 atomic_inc(&clp->cl_count);
1463 list_add_tail(&server->nfs4_siblings, &clp->cl_superblocks);
1464 up_write(&clp->cl_sem);
1465 return sb;
1466free_path:
1467 kfree(server->mnt_path);
1468err:
1469 server->mnt_path = NULL;
1470 return sb;
1471}
1472
1473static int nfs_clone_nfs4_sb(struct file_system_type *fs_type,
1474 int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt)
1475{
1476 struct nfs_clone_mount *data = raw_data;
1477 return nfs_clone_generic_sb(data, nfs4_clone_sb, nfs_clone_server, mnt);
1478}
1479
1480static struct super_block *nfs4_referral_sb(struct nfs_server *server, struct nfs_clone_mount *data)
1481{
1482 struct super_block *sb = ERR_PTR(-ENOMEM);
1483 int len;
1484
1485 len = strlen(data->mnt_path) + 1;
1486 server->mnt_path = kmalloc(len, GFP_KERNEL);
1487 if (server->mnt_path == NULL)
1488 goto err;
1489 memcpy(server->mnt_path, data->mnt_path, len);
1490 memcpy(&server->addr, data->addr, sizeof(struct sockaddr_in));
1491
1492 sb = sget(&nfs4_fs_type, nfs4_compare_super, nfs_set_super, server);
1493 if (IS_ERR(sb) || sb->s_root)
1494 goto free_path;
1495 return sb;
1496free_path:
1497 kfree(server->mnt_path);
1498err:
1499 server->mnt_path = NULL;
1500 return sb;
1501}
1502
1503static struct nfs_server *nfs4_referral_server(struct super_block *sb, struct nfs_clone_mount *data)
1504{
1505 struct nfs_server *server = NFS_SB(sb);
1506 struct rpc_timeout timeparms;
1507 int proto, timeo, retrans;
1508 void *err;
1509
1510 proto = IPPROTO_TCP;
1511 /* Since we are following a referral and there may be alternatives,
1512 set the timeouts and retries to low values */
1513 timeo = 2;
1514 retrans = 1;
1515 nfs_init_timeout_values(&timeparms, proto, timeo, retrans);
1516
1517 server->client = nfs4_create_client(server, &timeparms, proto, data->authflavor);
1518 if (IS_ERR((err = server->client)))
1519 goto out_err;
1520
1521 sb->s_time_gran = 1;
1522 sb->s_op = &nfs4_sops;
1523 err = ERR_PTR(nfs_sb_init(sb, data->authflavor));
1524 if (!IS_ERR(err))
1525 return server;
1526out_err:
1527 return (struct nfs_server *)err;
1528}
1529
1530static int nfs_referral_nfs4_sb(struct file_system_type *fs_type,
1531 int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt)
1532{
1533 struct nfs_clone_mount *data = raw_data;
1534 return nfs_clone_generic_sb(data, nfs4_referral_sb, nfs4_referral_server, mnt);
1535}
1536
1537#endif
diff --git a/fs/nfs/symlink.c b/fs/nfs/symlink.c
index 18dc95b0b646..600bbe630abd 100644
--- a/fs/nfs/symlink.c
+++ b/fs/nfs/symlink.c
@@ -52,7 +52,7 @@ static void *nfs_follow_link(struct dentry *dentry, struct nameidata *nd)
52{ 52{
53 struct inode *inode = dentry->d_inode; 53 struct inode *inode = dentry->d_inode;
54 struct page *page; 54 struct page *page;
55 void *err = ERR_PTR(nfs_revalidate_inode(NFS_SERVER(inode), inode)); 55 void *err = ERR_PTR(nfs_revalidate_mapping(inode, inode->i_mapping));
56 if (err) 56 if (err)
57 goto read_failed; 57 goto read_failed;
58 page = read_cache_page(&inode->i_data, 0, 58 page = read_cache_page(&inode->i_data, 0,
@@ -75,22 +75,13 @@ read_failed:
75 return NULL; 75 return NULL;
76} 76}
77 77
78static void nfs_put_link(struct dentry *dentry, struct nameidata *nd, void *cookie)
79{
80 if (cookie) {
81 struct page *page = cookie;
82 kunmap(page);
83 page_cache_release(page);
84 }
85}
86
87/* 78/*
88 * symlinks can't do much... 79 * symlinks can't do much...
89 */ 80 */
90struct inode_operations nfs_symlink_inode_operations = { 81struct inode_operations nfs_symlink_inode_operations = {
91 .readlink = generic_readlink, 82 .readlink = generic_readlink,
92 .follow_link = nfs_follow_link, 83 .follow_link = nfs_follow_link,
93 .put_link = nfs_put_link, 84 .put_link = page_put_link,
94 .getattr = nfs_getattr, 85 .getattr = nfs_getattr,
95 .setattr = nfs_setattr, 86 .setattr = nfs_setattr,
96}; 87};
diff --git a/fs/nfs/sysctl.c b/fs/nfs/sysctl.c
index 4c486eb867ca..db61e51bb154 100644
--- a/fs/nfs/sysctl.c
+++ b/fs/nfs/sysctl.c
@@ -12,6 +12,7 @@
12#include <linux/module.h> 12#include <linux/module.h>
13#include <linux/nfs4.h> 13#include <linux/nfs4.h>
14#include <linux/nfs_idmap.h> 14#include <linux/nfs_idmap.h>
15#include <linux/nfs_fs.h>
15 16
16#include "callback.h" 17#include "callback.h"
17 18
@@ -46,6 +47,15 @@ static ctl_table nfs_cb_sysctls[] = {
46 .strategy = &sysctl_jiffies, 47 .strategy = &sysctl_jiffies,
47 }, 48 },
48#endif 49#endif
50 {
51 .ctl_name = CTL_UNNUMBERED,
52 .procname = "nfs_mountpoint_timeout",
53 .data = &nfs_mountpoint_expiry_timeout,
54 .maxlen = sizeof(nfs_mountpoint_expiry_timeout),
55 .mode = 0644,
56 .proc_handler = &proc_dointvec_jiffies,
57 .strategy = &sysctl_jiffies,
58 },
49 { .ctl_name = 0 } 59 { .ctl_name = 0 }
50}; 60};
51 61
diff --git a/fs/nfs/write.c b/fs/nfs/write.c
index 4cfada2cc09f..b383fdd3a15c 100644
--- a/fs/nfs/write.c
+++ b/fs/nfs/write.c
@@ -98,11 +98,10 @@ struct nfs_write_data *nfs_commit_alloc(unsigned int pagecount)
98 if (p) { 98 if (p) {
99 memset(p, 0, sizeof(*p)); 99 memset(p, 0, sizeof(*p));
100 INIT_LIST_HEAD(&p->pages); 100 INIT_LIST_HEAD(&p->pages);
101 if (pagecount < NFS_PAGEVEC_SIZE) 101 if (pagecount <= ARRAY_SIZE(p->page_array))
102 p->pagevec = &p->page_array[0]; 102 p->pagevec = p->page_array;
103 else { 103 else {
104 size_t size = ++pagecount * sizeof(struct page *); 104 p->pagevec = kcalloc(pagecount, sizeof(struct page *), GFP_NOFS);
105 p->pagevec = kzalloc(size, GFP_NOFS);
106 if (!p->pagevec) { 105 if (!p->pagevec) {
107 mempool_free(p, nfs_commit_mempool); 106 mempool_free(p, nfs_commit_mempool);
108 p = NULL; 107 p = NULL;
@@ -126,14 +125,11 @@ struct nfs_write_data *nfs_writedata_alloc(unsigned int pagecount)
126 if (p) { 125 if (p) {
127 memset(p, 0, sizeof(*p)); 126 memset(p, 0, sizeof(*p));
128 INIT_LIST_HEAD(&p->pages); 127 INIT_LIST_HEAD(&p->pages);
129 if (pagecount < NFS_PAGEVEC_SIZE) 128 if (pagecount <= ARRAY_SIZE(p->page_array))
130 p->pagevec = &p->page_array[0]; 129 p->pagevec = p->page_array;
131 else { 130 else {
132 size_t size = ++pagecount * sizeof(struct page *); 131 p->pagevec = kcalloc(pagecount, sizeof(struct page *), GFP_NOFS);
133 p->pagevec = kmalloc(size, GFP_NOFS); 132 if (!p->pagevec) {
134 if (p->pagevec) {
135 memset(p->pagevec, 0, size);
136 } else {
137 mempool_free(p, nfs_wdata_mempool); 133 mempool_free(p, nfs_wdata_mempool);
138 p = NULL; 134 p = NULL;
139 } 135 }
@@ -583,6 +579,17 @@ static int nfs_wait_on_requests(struct inode *inode, unsigned long idx_start, un
583 return ret; 579 return ret;
584} 580}
585 581
582static void nfs_cancel_requests(struct list_head *head)
583{
584 struct nfs_page *req;
585 while(!list_empty(head)) {
586 req = nfs_list_entry(head->next);
587 nfs_list_remove_request(req);
588 nfs_inode_remove_request(req);
589 nfs_clear_page_writeback(req);
590 }
591}
592
586/* 593/*
587 * nfs_scan_dirty - Scan an inode for dirty requests 594 * nfs_scan_dirty - Scan an inode for dirty requests
588 * @inode: NFS inode to scan 595 * @inode: NFS inode to scan
@@ -627,7 +634,7 @@ nfs_scan_commit(struct inode *inode, struct list_head *dst, unsigned long idx_st
627 int res = 0; 634 int res = 0;
628 635
629 if (nfsi->ncommit != 0) { 636 if (nfsi->ncommit != 0) {
630 res = nfs_scan_list(&nfsi->commit, dst, idx_start, npages); 637 res = nfs_scan_list(nfsi, &nfsi->commit, dst, idx_start, npages);
631 nfsi->ncommit -= res; 638 nfsi->ncommit -= res;
632 if ((nfsi->ncommit == 0) != list_empty(&nfsi->commit)) 639 if ((nfsi->ncommit == 0) != list_empty(&nfsi->commit))
633 printk(KERN_ERR "NFS: desynchronized value of nfs_i.ncommit.\n"); 640 printk(KERN_ERR "NFS: desynchronized value of nfs_i.ncommit.\n");
@@ -1495,15 +1502,25 @@ int nfs_sync_inode_wait(struct inode *inode, unsigned long idx_start,
1495 pages = nfs_scan_dirty(inode, &head, idx_start, npages); 1502 pages = nfs_scan_dirty(inode, &head, idx_start, npages);
1496 if (pages != 0) { 1503 if (pages != 0) {
1497 spin_unlock(&nfsi->req_lock); 1504 spin_unlock(&nfsi->req_lock);
1498 ret = nfs_flush_list(inode, &head, pages, how); 1505 if (how & FLUSH_INVALIDATE)
1506 nfs_cancel_requests(&head);
1507 else
1508 ret = nfs_flush_list(inode, &head, pages, how);
1499 spin_lock(&nfsi->req_lock); 1509 spin_lock(&nfsi->req_lock);
1500 continue; 1510 continue;
1501 } 1511 }
1502 if (nocommit) 1512 if (nocommit)
1503 break; 1513 break;
1504 pages = nfs_scan_commit(inode, &head, 0, 0); 1514 pages = nfs_scan_commit(inode, &head, idx_start, npages);
1505 if (pages == 0) 1515 if (pages == 0)
1506 break; 1516 break;
1517 if (how & FLUSH_INVALIDATE) {
1518 spin_unlock(&nfsi->req_lock);
1519 nfs_cancel_requests(&head);
1520 spin_lock(&nfsi->req_lock);
1521 continue;
1522 }
1523 pages += nfs_scan_commit(inode, &head, 0, 0);
1507 spin_unlock(&nfsi->req_lock); 1524 spin_unlock(&nfsi->req_lock);
1508 ret = nfs_commit_list(inode, &head, how); 1525 ret = nfs_commit_list(inode, &head, how);
1509 spin_lock(&nfsi->req_lock); 1526 spin_lock(&nfsi->req_lock);
@@ -1512,7 +1529,7 @@ int nfs_sync_inode_wait(struct inode *inode, unsigned long idx_start,
1512 return ret; 1529 return ret;
1513} 1530}
1514 1531
1515int nfs_init_writepagecache(void) 1532int __init nfs_init_writepagecache(void)
1516{ 1533{
1517 nfs_wdata_cachep = kmem_cache_create("nfs_write_data", 1534 nfs_wdata_cachep = kmem_cache_create("nfs_write_data",
1518 sizeof(struct nfs_write_data), 1535 sizeof(struct nfs_write_data),
@@ -1534,7 +1551,7 @@ int nfs_init_writepagecache(void)
1534 return 0; 1551 return 0;
1535} 1552}
1536 1553
1537void nfs_destroy_writepagecache(void) 1554void __exit nfs_destroy_writepagecache(void)
1538{ 1555{
1539 mempool_destroy(nfs_commit_mempool); 1556 mempool_destroy(nfs_commit_mempool);
1540 mempool_destroy(nfs_wdata_mempool); 1557 mempool_destroy(nfs_wdata_mempool);
diff --git a/fs/super.c b/fs/super.c
index 057b5325b7ef..8a669f6f3f52 100644
--- a/fs/super.c
+++ b/fs/super.c
@@ -871,8 +871,6 @@ do_kern_mount(const char *fstype, int flags, const char *name, void *data)
871 return mnt; 871 return mnt;
872} 872}
873 873
874EXPORT_SYMBOL_GPL(do_kern_mount);
875
876struct vfsmount *kern_mount(struct file_system_type *type) 874struct vfsmount *kern_mount(struct file_system_type *type)
877{ 875{
878 return vfs_kern_mount(type, 0, type->name, NULL); 876 return vfs_kern_mount(type, 0, type->name, NULL);
diff --git a/include/linux/fs.h b/include/linux/fs.h
index dba4cbd157ee..2d8b348c1192 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -1100,7 +1100,7 @@ struct super_operations {
1100 int (*statfs) (struct dentry *, struct kstatfs *); 1100 int (*statfs) (struct dentry *, struct kstatfs *);
1101 int (*remount_fs) (struct super_block *, int *, char *); 1101 int (*remount_fs) (struct super_block *, int *, char *);
1102 void (*clear_inode) (struct inode *); 1102 void (*clear_inode) (struct inode *);
1103 void (*umount_begin) (struct super_block *); 1103 void (*umount_begin) (struct vfsmount *, int);
1104 1104
1105 int (*show_options)(struct seq_file *, struct vfsmount *); 1105 int (*show_options)(struct seq_file *, struct vfsmount *);
1106 int (*show_stats)(struct seq_file *, struct vfsmount *); 1106 int (*show_stats)(struct seq_file *, struct vfsmount *);
@@ -1767,7 +1767,7 @@ extern struct inode_operations simple_dir_inode_operations;
1767struct tree_descr { char *name; const struct file_operations *ops; int mode; }; 1767struct tree_descr { char *name; const struct file_operations *ops; int mode; };
1768struct dentry *d_alloc_name(struct dentry *, const char *); 1768struct dentry *d_alloc_name(struct dentry *, const char *);
1769extern int simple_fill_super(struct super_block *, int, struct tree_descr *); 1769extern int simple_fill_super(struct super_block *, int, struct tree_descr *);
1770extern int simple_pin_fs(char *name, struct vfsmount **mount, int *count); 1770extern int simple_pin_fs(struct file_system_type *, struct vfsmount **mount, int *count);
1771extern void simple_release_fs(struct vfsmount **mount, int *count); 1771extern void simple_release_fs(struct vfsmount **mount, int *count);
1772 1772
1773extern ssize_t simple_read_from_buffer(void __user *, size_t, loff_t *, const void *, size_t); 1773extern ssize_t simple_read_from_buffer(void __user *, size_t, loff_t *, const void *, size_t);
diff --git a/include/linux/lockd/lockd.h b/include/linux/lockd/lockd.h
index a8876bc6513b..aa4fe905bb4d 100644
--- a/include/linux/lockd/lockd.h
+++ b/include/linux/lockd/lockd.h
@@ -49,11 +49,12 @@ struct nlm_host {
49 h_killed : 1, 49 h_killed : 1,
50 h_monitored : 1; 50 h_monitored : 1;
51 wait_queue_head_t h_gracewait; /* wait while reclaiming */ 51 wait_queue_head_t h_gracewait; /* wait while reclaiming */
52 struct rw_semaphore h_rwsem; /* Reboot recovery lock */
52 u32 h_state; /* pseudo-state counter */ 53 u32 h_state; /* pseudo-state counter */
53 u32 h_nsmstate; /* true remote NSM state */ 54 u32 h_nsmstate; /* true remote NSM state */
54 u32 h_pidcount; /* Pseudopids */ 55 u32 h_pidcount; /* Pseudopids */
55 atomic_t h_count; /* reference count */ 56 atomic_t h_count; /* reference count */
56 struct semaphore h_sema; /* mutex for pmap binding */ 57 struct mutex h_mutex; /* mutex for pmap binding */
57 unsigned long h_nextrebind; /* next portmap call */ 58 unsigned long h_nextrebind; /* next portmap call */
58 unsigned long h_expires; /* eligible for GC */ 59 unsigned long h_expires; /* eligible for GC */
59 struct list_head h_lockowners; /* Lockowners for the client */ 60 struct list_head h_lockowners; /* Lockowners for the client */
@@ -219,6 +220,7 @@ static __inline__ int
219nlm_compare_locks(const struct file_lock *fl1, const struct file_lock *fl2) 220nlm_compare_locks(const struct file_lock *fl1, const struct file_lock *fl2)
220{ 221{
221 return fl1->fl_pid == fl2->fl_pid 222 return fl1->fl_pid == fl2->fl_pid
223 && fl1->fl_owner == fl2->fl_owner
222 && fl1->fl_start == fl2->fl_start 224 && fl1->fl_start == fl2->fl_start
223 && fl1->fl_end == fl2->fl_end 225 && fl1->fl_end == fl2->fl_end
224 &&(fl1->fl_type == fl2->fl_type || fl2->fl_type == F_UNLCK); 226 &&(fl1->fl_type == fl2->fl_type || fl2->fl_type == F_UNLCK);
diff --git a/include/linux/mount.h b/include/linux/mount.h
index 60718f12caa9..403d1a97c512 100644
--- a/include/linux/mount.h
+++ b/include/linux/mount.h
@@ -28,6 +28,8 @@ struct namespace;
28#define MNT_NOATIME 0x08 28#define MNT_NOATIME 0x08
29#define MNT_NODIRATIME 0x10 29#define MNT_NODIRATIME 0x10
30 30
31#define MNT_SHRINKABLE 0x100
32
31#define MNT_SHARED 0x1000 /* if the vfsmount is a shared mount */ 33#define MNT_SHARED 0x1000 /* if the vfsmount is a shared mount */
32#define MNT_UNBINDABLE 0x2000 /* if the vfsmount is a unbindable mount */ 34#define MNT_UNBINDABLE 0x2000 /* if the vfsmount is a unbindable mount */
33#define MNT_PNODE_MASK 0x3000 /* propogation flag mask */ 35#define MNT_PNODE_MASK 0x3000 /* propogation flag mask */
@@ -78,12 +80,18 @@ extern struct vfsmount *alloc_vfsmnt(const char *name);
78extern struct vfsmount *do_kern_mount(const char *fstype, int flags, 80extern struct vfsmount *do_kern_mount(const char *fstype, int flags,
79 const char *name, void *data); 81 const char *name, void *data);
80 82
83struct file_system_type;
84extern struct vfsmount *vfs_kern_mount(struct file_system_type *type,
85 int flags, const char *name,
86 void *data);
87
81struct nameidata; 88struct nameidata;
82 89
83extern int do_add_mount(struct vfsmount *newmnt, struct nameidata *nd, 90extern int do_add_mount(struct vfsmount *newmnt, struct nameidata *nd,
84 int mnt_flags, struct list_head *fslist); 91 int mnt_flags, struct list_head *fslist);
85 92
86extern void mark_mounts_for_expiry(struct list_head *mounts); 93extern void mark_mounts_for_expiry(struct list_head *mounts);
94extern void shrink_submounts(struct vfsmount *mountpoint, struct list_head *mounts);
87 95
88extern spinlock_t vfsmount_lock; 96extern spinlock_t vfsmount_lock;
89extern dev_t name_to_dev_t(char *name); 97extern dev_t name_to_dev_t(char *name);
diff --git a/include/linux/nfs4.h b/include/linux/nfs4.h
index 1059e6d69d3b..5f681d534295 100644
--- a/include/linux/nfs4.h
+++ b/include/linux/nfs4.h
@@ -384,6 +384,7 @@ enum {
384 NFSPROC4_CLNT_DELEGRETURN, 384 NFSPROC4_CLNT_DELEGRETURN,
385 NFSPROC4_CLNT_GETACL, 385 NFSPROC4_CLNT_GETACL,
386 NFSPROC4_CLNT_SETACL, 386 NFSPROC4_CLNT_SETACL,
387 NFSPROC4_CLNT_FS_LOCATIONS,
387}; 388};
388 389
389#endif 390#endif
diff --git a/include/linux/nfs_fs.h b/include/linux/nfs_fs.h
index 7e079f8ce18b..0a1740b2532e 100644
--- a/include/linux/nfs_fs.h
+++ b/include/linux/nfs_fs.h
@@ -9,6 +9,27 @@
9#ifndef _LINUX_NFS_FS_H 9#ifndef _LINUX_NFS_FS_H
10#define _LINUX_NFS_FS_H 10#define _LINUX_NFS_FS_H
11 11
12#include <linux/config.h>
13#include <linux/in.h>
14#include <linux/mm.h>
15#include <linux/pagemap.h>
16#include <linux/rwsem.h>
17#include <linux/wait.h>
18
19#include <linux/sunrpc/debug.h>
20#include <linux/sunrpc/auth.h>
21#include <linux/sunrpc/clnt.h>
22
23#include <linux/nfs.h>
24#include <linux/nfs2.h>
25#include <linux/nfs3.h>
26#include <linux/nfs4.h>
27#include <linux/nfs_xdr.h>
28
29#include <linux/nfs_fs_sb.h>
30
31#include <linux/rwsem.h>
32#include <linux/mempool.h>
12 33
13/* 34/*
14 * Enable debugging support for nfs client. 35 * Enable debugging support for nfs client.
@@ -41,27 +62,9 @@
41#define FLUSH_LOWPRI 8 /* low priority background flush */ 62#define FLUSH_LOWPRI 8 /* low priority background flush */
42#define FLUSH_HIGHPRI 16 /* high priority memory reclaim flush */ 63#define FLUSH_HIGHPRI 16 /* high priority memory reclaim flush */
43#define FLUSH_NOCOMMIT 32 /* Don't send the NFSv3/v4 COMMIT */ 64#define FLUSH_NOCOMMIT 32 /* Don't send the NFSv3/v4 COMMIT */
65#define FLUSH_INVALIDATE 64 /* Invalidate the page cache */
44 66
45#ifdef __KERNEL__ 67#ifdef __KERNEL__
46#include <linux/in.h>
47#include <linux/mm.h>
48#include <linux/pagemap.h>
49#include <linux/rwsem.h>
50#include <linux/wait.h>
51
52#include <linux/nfs_fs_sb.h>
53
54#include <linux/sunrpc/debug.h>
55#include <linux/sunrpc/auth.h>
56#include <linux/sunrpc/clnt.h>
57
58#include <linux/nfs.h>
59#include <linux/nfs2.h>
60#include <linux/nfs3.h>
61#include <linux/nfs4.h>
62#include <linux/nfs_xdr.h>
63#include <linux/rwsem.h>
64#include <linux/mempool.h>
65 68
66/* 69/*
67 * NFSv3/v4 Access mode cache entry 70 * NFSv3/v4 Access mode cache entry
@@ -233,8 +236,12 @@ static inline int nfs_caches_unstable(struct inode *inode)
233 236
234static inline void nfs_mark_for_revalidate(struct inode *inode) 237static inline void nfs_mark_for_revalidate(struct inode *inode)
235{ 238{
239 struct nfs_inode *nfsi = NFS_I(inode);
240
236 spin_lock(&inode->i_lock); 241 spin_lock(&inode->i_lock);
237 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS; 242 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS;
243 if (S_ISDIR(inode->i_mode))
244 nfsi->cache_validity |= NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
238 spin_unlock(&inode->i_lock); 245 spin_unlock(&inode->i_lock);
239} 246}
240 247
@@ -296,7 +303,7 @@ extern int nfs_release(struct inode *, struct file *);
296extern int nfs_attribute_timeout(struct inode *inode); 303extern int nfs_attribute_timeout(struct inode *inode);
297extern int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode); 304extern int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode);
298extern int __nfs_revalidate_inode(struct nfs_server *, struct inode *); 305extern int __nfs_revalidate_inode(struct nfs_server *, struct inode *);
299extern void nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping); 306extern int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping);
300extern int nfs_setattr(struct dentry *, struct iattr *); 307extern int nfs_setattr(struct dentry *, struct iattr *);
301extern void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr); 308extern void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr);
302extern void nfs_begin_attr_update(struct inode *); 309extern void nfs_begin_attr_update(struct inode *);
@@ -306,6 +313,10 @@ extern void nfs_end_data_update(struct inode *);
306extern struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx); 313extern struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx);
307extern void put_nfs_open_context(struct nfs_open_context *ctx); 314extern void put_nfs_open_context(struct nfs_open_context *ctx);
308extern struct nfs_open_context *nfs_find_open_context(struct inode *inode, struct rpc_cred *cred, int mode); 315extern struct nfs_open_context *nfs_find_open_context(struct inode *inode, struct rpc_cred *cred, int mode);
316extern struct vfsmount *nfs_do_submount(const struct vfsmount *mnt_parent,
317 const struct dentry *dentry,
318 struct nfs_fh *fh,
319 struct nfs_fattr *fattr);
309 320
310/* linux/net/ipv4/ipconfig.c: trims ip addr off front of name, too. */ 321/* linux/net/ipv4/ipconfig.c: trims ip addr off front of name, too. */
311extern u32 root_nfs_parse_addr(char *name); /*__init*/ 322extern u32 root_nfs_parse_addr(char *name); /*__init*/
@@ -392,6 +403,15 @@ extern void nfs_unregister_sysctl(void);
392#endif 403#endif
393 404
394/* 405/*
406 * linux/fs/nfs/namespace.c
407 */
408extern struct list_head nfs_automount_list;
409extern struct inode_operations nfs_mountpoint_inode_operations;
410extern struct inode_operations nfs_referral_inode_operations;
411extern int nfs_mountpoint_expiry_timeout;
412extern void nfs_release_automount_timer(void);
413
414/*
395 * linux/fs/nfs/unlink.c 415 * linux/fs/nfs/unlink.c
396 */ 416 */
397extern int nfs_async_unlink(struct dentry *); 417extern int nfs_async_unlink(struct dentry *);
diff --git a/include/linux/nfs_fs_sb.h b/include/linux/nfs_fs_sb.h
index 65dec21af774..6b4a13c79474 100644
--- a/include/linux/nfs_fs_sb.h
+++ b/include/linux/nfs_fs_sb.h
@@ -35,6 +35,7 @@ struct nfs_server {
35 char * hostname; /* remote hostname */ 35 char * hostname; /* remote hostname */
36 struct nfs_fh fh; 36 struct nfs_fh fh;
37 struct sockaddr_in addr; 37 struct sockaddr_in addr;
38 struct nfs_fsid fsid;
38 unsigned long mount_time; /* when this fs was mounted */ 39 unsigned long mount_time; /* when this fs was mounted */
39#ifdef CONFIG_NFS_V4 40#ifdef CONFIG_NFS_V4
40 /* Our own IP address, as a null-terminated string. 41 /* Our own IP address, as a null-terminated string.
diff --git a/include/linux/nfs_page.h b/include/linux/nfs_page.h
index 66e2ed658527..1f7bd287c230 100644
--- a/include/linux/nfs_page.h
+++ b/include/linux/nfs_page.h
@@ -13,7 +13,6 @@
13#include <linux/list.h> 13#include <linux/list.h>
14#include <linux/pagemap.h> 14#include <linux/pagemap.h>
15#include <linux/wait.h> 15#include <linux/wait.h>
16#include <linux/nfs_fs_sb.h>
17#include <linux/sunrpc/auth.h> 16#include <linux/sunrpc/auth.h>
18#include <linux/nfs_xdr.h> 17#include <linux/nfs_xdr.h>
19 18
@@ -63,8 +62,8 @@ extern void nfs_release_request(struct nfs_page *req);
63 62
64extern int nfs_scan_lock_dirty(struct nfs_inode *nfsi, struct list_head *dst, 63extern int nfs_scan_lock_dirty(struct nfs_inode *nfsi, struct list_head *dst,
65 unsigned long idx_start, unsigned int npages); 64 unsigned long idx_start, unsigned int npages);
66extern int nfs_scan_list(struct list_head *, struct list_head *, 65extern int nfs_scan_list(struct nfs_inode *nfsi, struct list_head *head, struct list_head *dst,
67 unsigned long, unsigned int); 66 unsigned long idx_start, unsigned int npages);
68extern int nfs_coalesce_requests(struct list_head *, struct list_head *, 67extern int nfs_coalesce_requests(struct list_head *, struct list_head *,
69 unsigned int); 68 unsigned int);
70extern int nfs_wait_on_request(struct nfs_page *); 69extern int nfs_wait_on_request(struct nfs_page *);
diff --git a/include/linux/nfs_xdr.h b/include/linux/nfs_xdr.h
index 7fafc4c546b7..7c7320fa51aa 100644
--- a/include/linux/nfs_xdr.h
+++ b/include/linux/nfs_xdr.h
@@ -14,11 +14,19 @@
14#define NFS_DEF_FILE_IO_SIZE (4096U) 14#define NFS_DEF_FILE_IO_SIZE (4096U)
15#define NFS_MIN_FILE_IO_SIZE (1024U) 15#define NFS_MIN_FILE_IO_SIZE (1024U)
16 16
17struct nfs4_fsid { 17struct nfs_fsid {
18 __u64 major; 18 uint64_t major;
19 __u64 minor; 19 uint64_t minor;
20}; 20};
21 21
22/*
23 * Helper for checking equality between 2 fsids.
24 */
25static inline int nfs_fsid_equal(const struct nfs_fsid *a, const struct nfs_fsid *b)
26{
27 return a->major == b->major && a->minor == b->minor;
28}
29
22struct nfs_fattr { 30struct nfs_fattr {
23 unsigned short valid; /* which fields are valid */ 31 unsigned short valid; /* which fields are valid */
24 __u64 pre_size; /* pre_op_attr.size */ 32 __u64 pre_size; /* pre_op_attr.size */
@@ -40,10 +48,7 @@ struct nfs_fattr {
40 } nfs3; 48 } nfs3;
41 } du; 49 } du;
42 dev_t rdev; 50 dev_t rdev;
43 union { 51 struct nfs_fsid fsid;
44 __u64 nfs3; /* also nfs2 */
45 struct nfs4_fsid nfs4;
46 } fsid_u;
47 __u64 fileid; 52 __u64 fileid;
48 struct timespec atime; 53 struct timespec atime;
49 struct timespec mtime; 54 struct timespec mtime;
@@ -57,8 +62,8 @@ struct nfs_fattr {
57#define NFS_ATTR_WCC 0x0001 /* pre-op WCC data */ 62#define NFS_ATTR_WCC 0x0001 /* pre-op WCC data */
58#define NFS_ATTR_FATTR 0x0002 /* post-op attributes */ 63#define NFS_ATTR_FATTR 0x0002 /* post-op attributes */
59#define NFS_ATTR_FATTR_V3 0x0004 /* NFSv3 attributes */ 64#define NFS_ATTR_FATTR_V3 0x0004 /* NFSv3 attributes */
60#define NFS_ATTR_FATTR_V4 0x0008 65#define NFS_ATTR_FATTR_V4 0x0008 /* NFSv4 change attribute */
61#define NFS_ATTR_PRE_CHANGE 0x0010 66#define NFS_ATTR_FATTR_V4_REFERRAL 0x0010 /* NFSv4 referral */
62 67
63/* 68/*
64 * Info on the file system 69 * Info on the file system
@@ -675,6 +680,40 @@ struct nfs4_server_caps_res {
675 u32 has_symlinks; 680 u32 has_symlinks;
676}; 681};
677 682
683struct nfs4_string {
684 unsigned int len;
685 char *data;
686};
687
688#define NFS4_PATHNAME_MAXCOMPONENTS 512
689struct nfs4_pathname {
690 unsigned int ncomponents;
691 struct nfs4_string components[NFS4_PATHNAME_MAXCOMPONENTS];
692};
693
694#define NFS4_FS_LOCATION_MAXSERVERS 10
695struct nfs4_fs_location {
696 unsigned int nservers;
697 struct nfs4_string servers[NFS4_FS_LOCATION_MAXSERVERS];
698 struct nfs4_pathname rootpath;
699};
700
701#define NFS4_FS_LOCATIONS_MAXENTRIES 10
702struct nfs4_fs_locations {
703 struct nfs_fattr fattr;
704 const struct nfs_server *server;
705 struct nfs4_pathname fs_path;
706 int nlocations;
707 struct nfs4_fs_location locations[NFS4_FS_LOCATIONS_MAXENTRIES];
708};
709
710struct nfs4_fs_locations_arg {
711 const struct nfs_fh *dir_fh;
712 const struct qstr *name;
713 struct page *page;
714 const u32 *bitmask;
715};
716
678#endif /* CONFIG_NFS_V4 */ 717#endif /* CONFIG_NFS_V4 */
679 718
680struct nfs_page; 719struct nfs_page;
@@ -695,7 +734,7 @@ struct nfs_read_data {
695#ifdef CONFIG_NFS_V4 734#ifdef CONFIG_NFS_V4
696 unsigned long timestamp; /* For lease renewal */ 735 unsigned long timestamp; /* For lease renewal */
697#endif 736#endif
698 struct page *page_array[NFS_PAGEVEC_SIZE + 1]; 737 struct page *page_array[NFS_PAGEVEC_SIZE];
699}; 738};
700 739
701struct nfs_write_data { 740struct nfs_write_data {
@@ -713,7 +752,7 @@ struct nfs_write_data {
713#ifdef CONFIG_NFS_V4 752#ifdef CONFIG_NFS_V4
714 unsigned long timestamp; /* For lease renewal */ 753 unsigned long timestamp; /* For lease renewal */
715#endif 754#endif
716 struct page *page_array[NFS_PAGEVEC_SIZE + 1]; 755 struct page *page_array[NFS_PAGEVEC_SIZE];
717}; 756};
718 757
719struct nfs_access_entry; 758struct nfs_access_entry;
diff --git a/include/linux/sunrpc/xdr.h b/include/linux/sunrpc/xdr.h
index 84c35d42d250..e6d3d349506c 100644
--- a/include/linux/sunrpc/xdr.h
+++ b/include/linux/sunrpc/xdr.h
@@ -194,6 +194,7 @@ extern void xdr_write_pages(struct xdr_stream *xdr, struct page **pages,
194extern void xdr_init_decode(struct xdr_stream *xdr, struct xdr_buf *buf, uint32_t *p); 194extern void xdr_init_decode(struct xdr_stream *xdr, struct xdr_buf *buf, uint32_t *p);
195extern uint32_t *xdr_inline_decode(struct xdr_stream *xdr, size_t nbytes); 195extern uint32_t *xdr_inline_decode(struct xdr_stream *xdr, size_t nbytes);
196extern void xdr_read_pages(struct xdr_stream *xdr, unsigned int len); 196extern void xdr_read_pages(struct xdr_stream *xdr, unsigned int len);
197extern void xdr_enter_page(struct xdr_stream *xdr, unsigned int len);
197 198
198#endif /* __KERNEL__ */ 199#endif /* __KERNEL__ */
199 200
diff --git a/mm/shmem.c b/mm/shmem.c
index 84b5cf9b63c5..38bc3334f263 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -2255,7 +2255,7 @@ static int __init init_tmpfs(void)
2255#ifdef CONFIG_TMPFS 2255#ifdef CONFIG_TMPFS
2256 devfs_mk_dir("shm"); 2256 devfs_mk_dir("shm");
2257#endif 2257#endif
2258 shm_mnt = do_kern_mount(tmpfs_fs_type.name, MS_NOUSER, 2258 shm_mnt = vfs_kern_mount(&tmpfs_fs_type, MS_NOUSER,
2259 tmpfs_fs_type.name, NULL); 2259 tmpfs_fs_type.name, NULL);
2260 if (IS_ERR(shm_mnt)) { 2260 if (IS_ERR(shm_mnt)) {
2261 error = PTR_ERR(shm_mnt); 2261 error = PTR_ERR(shm_mnt);
diff --git a/net/sunrpc/auth_null.c b/net/sunrpc/auth_null.c
index f56767aaa927..2eccffa96ba1 100644
--- a/net/sunrpc/auth_null.c
+++ b/net/sunrpc/auth_null.c
@@ -118,6 +118,8 @@ struct rpc_auth null_auth = {
118 .au_cslack = 4, 118 .au_cslack = 4,
119 .au_rslack = 2, 119 .au_rslack = 2,
120 .au_ops = &authnull_ops, 120 .au_ops = &authnull_ops,
121 .au_flavor = RPC_AUTH_NULL,
122 .au_count = ATOMIC_INIT(0),
121}; 123};
122 124
123static 125static
diff --git a/net/sunrpc/auth_unix.c b/net/sunrpc/auth_unix.c
index df14b6bfbf10..74c7406a1054 100644
--- a/net/sunrpc/auth_unix.c
+++ b/net/sunrpc/auth_unix.c
@@ -225,6 +225,7 @@ struct rpc_auth unix_auth = {
225 .au_cslack = UNX_WRITESLACK, 225 .au_cslack = UNX_WRITESLACK,
226 .au_rslack = 2, /* assume AUTH_NULL verf */ 226 .au_rslack = 2, /* assume AUTH_NULL verf */
227 .au_ops = &authunix_ops, 227 .au_ops = &authunix_ops,
228 .au_flavor = RPC_AUTH_UNIX,
228 .au_count = ATOMIC_INIT(0), 229 .au_count = ATOMIC_INIT(0),
229 .au_credcache = &unix_cred_cache, 230 .au_credcache = &unix_cred_cache,
230}; 231};
diff --git a/net/sunrpc/rpc_pipe.c b/net/sunrpc/rpc_pipe.c
index 8241fa726803..dafe793c774e 100644
--- a/net/sunrpc/rpc_pipe.c
+++ b/net/sunrpc/rpc_pipe.c
@@ -439,7 +439,7 @@ struct vfsmount *rpc_get_mount(void)
439{ 439{
440 int err; 440 int err;
441 441
442 err = simple_pin_fs("rpc_pipefs", &rpc_mount, &rpc_mount_count); 442 err = simple_pin_fs(&rpc_pipe_fs_type, &rpc_mount, &rpc_mount_count);
443 if (err != 0) 443 if (err != 0)
444 return ERR_PTR(err); 444 return ERR_PTR(err);
445 return rpc_mount; 445 return rpc_mount;
diff --git a/net/sunrpc/xdr.c b/net/sunrpc/xdr.c
index ca4bfa57e116..49174f0d0a3e 100644
--- a/net/sunrpc/xdr.c
+++ b/net/sunrpc/xdr.c
@@ -568,8 +568,7 @@ EXPORT_SYMBOL(xdr_inline_decode);
568 * 568 *
569 * Moves data beyond the current pointer position from the XDR head[] buffer 569 * Moves data beyond the current pointer position from the XDR head[] buffer
570 * into the page list. Any data that lies beyond current position + "len" 570 * into the page list. Any data that lies beyond current position + "len"
571 * bytes is moved into the XDR tail[]. The current pointer is then 571 * bytes is moved into the XDR tail[].
572 * repositioned at the beginning of the XDR tail.
573 */ 572 */
574void xdr_read_pages(struct xdr_stream *xdr, unsigned int len) 573void xdr_read_pages(struct xdr_stream *xdr, unsigned int len)
575{ 574{
@@ -606,6 +605,31 @@ void xdr_read_pages(struct xdr_stream *xdr, unsigned int len)
606} 605}
607EXPORT_SYMBOL(xdr_read_pages); 606EXPORT_SYMBOL(xdr_read_pages);
608 607
608/**
609 * xdr_enter_page - decode data from the XDR page
610 * @xdr: pointer to xdr_stream struct
611 * @len: number of bytes of page data
612 *
613 * Moves data beyond the current pointer position from the XDR head[] buffer
614 * into the page list. Any data that lies beyond current position + "len"
615 * bytes is moved into the XDR tail[]. The current pointer is then
616 * repositioned at the beginning of the first XDR page.
617 */
618void xdr_enter_page(struct xdr_stream *xdr, unsigned int len)
619{
620 char * kaddr = page_address(xdr->buf->pages[0]);
621 xdr_read_pages(xdr, len);
622 /*
623 * Position current pointer at beginning of tail, and
624 * set remaining message length.
625 */
626 if (len > PAGE_CACHE_SIZE - xdr->buf->page_base)
627 len = PAGE_CACHE_SIZE - xdr->buf->page_base;
628 xdr->p = (uint32_t *)(kaddr + xdr->buf->page_base);
629 xdr->end = (uint32_t *)((char *)xdr->p + len);
630}
631EXPORT_SYMBOL(xdr_enter_page);
632
609static struct kvec empty_iov = {.iov_base = NULL, .iov_len = 0}; 633static struct kvec empty_iov = {.iov_base = NULL, .iov_len = 0};
610 634
611void 635void
diff --git a/net/sunrpc/xprt.c b/net/sunrpc/xprt.c
index 4dd5b3cfe754..02060d0e7be8 100644
--- a/net/sunrpc/xprt.c
+++ b/net/sunrpc/xprt.c
@@ -41,7 +41,7 @@
41#include <linux/types.h> 41#include <linux/types.h>
42#include <linux/interrupt.h> 42#include <linux/interrupt.h>
43#include <linux/workqueue.h> 43#include <linux/workqueue.h>
44#include <linux/random.h> 44#include <linux/net.h>
45 45
46#include <linux/sunrpc/clnt.h> 46#include <linux/sunrpc/clnt.h>
47#include <linux/sunrpc/metrics.h> 47#include <linux/sunrpc/metrics.h>
@@ -830,7 +830,7 @@ static inline u32 xprt_alloc_xid(struct rpc_xprt *xprt)
830 830
831static inline void xprt_init_xid(struct rpc_xprt *xprt) 831static inline void xprt_init_xid(struct rpc_xprt *xprt)
832{ 832{
833 get_random_bytes(&xprt->xid, sizeof(xprt->xid)); 833 xprt->xid = net_random();
834} 834}
835 835
836static void xprt_request_init(struct rpc_task *task, struct rpc_xprt *xprt) 836static void xprt_request_init(struct rpc_task *task, struct rpc_xprt *xprt)
diff --git a/net/sunrpc/xprtsock.c b/net/sunrpc/xprtsock.c
index 4b4e7dfdff14..21006b109101 100644
--- a/net/sunrpc/xprtsock.c
+++ b/net/sunrpc/xprtsock.c
@@ -930,6 +930,13 @@ static void xs_udp_timer(struct rpc_task *task)
930 xprt_adjust_cwnd(task, -ETIMEDOUT); 930 xprt_adjust_cwnd(task, -ETIMEDOUT);
931} 931}
932 932
933static unsigned short xs_get_random_port(void)
934{
935 unsigned short range = xprt_max_resvport - xprt_min_resvport;
936 unsigned short rand = (unsigned short) net_random() % range;
937 return rand + xprt_min_resvport;
938}
939
933/** 940/**
934 * xs_set_port - reset the port number in the remote endpoint address 941 * xs_set_port - reset the port number in the remote endpoint address
935 * @xprt: generic transport 942 * @xprt: generic transport
@@ -1275,7 +1282,7 @@ int xs_setup_udp(struct rpc_xprt *xprt, struct rpc_timeout *to)
1275 memset(xprt->slot, 0, slot_table_size); 1282 memset(xprt->slot, 0, slot_table_size);
1276 1283
1277 xprt->prot = IPPROTO_UDP; 1284 xprt->prot = IPPROTO_UDP;
1278 xprt->port = xprt_max_resvport; 1285 xprt->port = xs_get_random_port();
1279 xprt->tsh_size = 0; 1286 xprt->tsh_size = 0;
1280 xprt->resvport = capable(CAP_NET_BIND_SERVICE) ? 1 : 0; 1287 xprt->resvport = capable(CAP_NET_BIND_SERVICE) ? 1 : 0;
1281 /* XXX: header size can vary due to auth type, IPv6, etc. */ 1288 /* XXX: header size can vary due to auth type, IPv6, etc. */
@@ -1317,7 +1324,7 @@ int xs_setup_tcp(struct rpc_xprt *xprt, struct rpc_timeout *to)
1317 memset(xprt->slot, 0, slot_table_size); 1324 memset(xprt->slot, 0, slot_table_size);
1318 1325
1319 xprt->prot = IPPROTO_TCP; 1326 xprt->prot = IPPROTO_TCP;
1320 xprt->port = xprt_max_resvport; 1327 xprt->port = xs_get_random_port();
1321 xprt->tsh_size = sizeof(rpc_fraghdr) / sizeof(u32); 1328 xprt->tsh_size = sizeof(rpc_fraghdr) / sizeof(u32);
1322 xprt->resvport = capable(CAP_NET_BIND_SERVICE) ? 1 : 0; 1329 xprt->resvport = capable(CAP_NET_BIND_SERVICE) ? 1 : 0;
1323 xprt->max_payload = RPC_MAX_FRAGMENT_SIZE; 1330 xprt->max_payload = RPC_MAX_FRAGMENT_SIZE;
diff --git a/security/inode.c b/security/inode.c
index e6fc29ac8564..98a0df500dc6 100644
--- a/security/inode.c
+++ b/security/inode.c
@@ -224,7 +224,7 @@ struct dentry *securityfs_create_file(const char *name, mode_t mode,
224 224
225 pr_debug("securityfs: creating file '%s'\n",name); 225 pr_debug("securityfs: creating file '%s'\n",name);
226 226
227 error = simple_pin_fs("securityfs", &mount, &mount_count); 227 error = simple_pin_fs(&fs_type, &mount, &mount_count);
228 if (error) { 228 if (error) {
229 dentry = ERR_PTR(error); 229 dentry = ERR_PTR(error);
230 goto exit; 230 goto exit;
generated by cgit v1.2.2 (git 2.25.0) at 2024-10-17 08:23:34 -0400