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-rw-r--r--fs/nfs/Makefile5
-rw-r--r--fs/nfs/callback.c2
-rw-r--r--fs/nfs/direct.c6
-rw-r--r--fs/nfs/inode.c1793
-rw-r--r--fs/nfs/internal.h179
-rw-r--r--fs/nfs/namespace.c112
-rw-r--r--fs/nfs/nfs2xdr.c2
-rw-r--r--fs/nfs/nfs3proc.c5
-rw-r--r--fs/nfs/nfs3xdr.c3
-rw-r--r--fs/nfs/nfs4namespace.c201
-rw-r--r--fs/nfs/nfs4proc.c2
-rw-r--r--fs/nfs/pagelist.c4
-rw-r--r--fs/nfs/proc.c5
-rw-r--r--fs/nfs/read.c4
-rw-r--r--fs/nfs/super.c1468
-rw-r--r--fs/nfs/write.c4
16 files changed, 1993 insertions, 1802 deletions
diff --git a/fs/nfs/Makefile b/fs/nfs/Makefile
index d9d494cee388..0b572a0c1967 100644
--- a/fs/nfs/Makefile
+++ b/fs/nfs/Makefile
@@ -4,7 +4,7 @@
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 9 namespace.o
10nfs-$(CONFIG_ROOT_NFS) += nfsroot.o mount_clnt.o 10nfs-$(CONFIG_ROOT_NFS) += nfsroot.o mount_clnt.o
@@ -12,7 +12,8 @@ nfs-$(CONFIG_NFS_V3) += nfs3proc.o nfs3xdr.o
12nfs-$(CONFIG_NFS_V3_ACL) += nfs3acl.o 12nfs-$(CONFIG_NFS_V3_ACL) += nfs3acl.o
13nfs-$(CONFIG_NFS_V4) += nfs4proc.o nfs4xdr.o nfs4state.o nfs4renewd.o \ 13nfs-$(CONFIG_NFS_V4) += nfs4proc.o nfs4xdr.o nfs4state.o nfs4renewd.o \
14 delegation.o idmap.o \ 14 delegation.o idmap.o \
15 callback.o callback_xdr.o callback_proc.o 15 callback.o callback_xdr.o callback_proc.o \
16 nfs4namespace.o
16nfs-$(CONFIG_NFS_DIRECTIO) += direct.o 17nfs-$(CONFIG_NFS_DIRECTIO) += direct.o
17nfs-$(CONFIG_SYSCTL) += sysctl.o 18nfs-$(CONFIG_SYSCTL) += sysctl.o
18nfs-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/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/inode.c b/fs/nfs/inode.c
index 7ab2b38a990c..24a7139d3449 100644
--- a/fs/nfs/inode.c
+++ b/fs/nfs/inode.c
@@ -46,87 +46,17 @@
46#include "callback.h" 46#include "callback.h"
47#include "delegation.h" 47#include "delegation.h"
48#include "iostat.h" 48#include "iostat.h"
49#include "internal.h"
49 50
50#define NFSDBG_FACILITY NFSDBG_VFS 51#define NFSDBG_FACILITY NFSDBG_VFS
51#define NFS_PARANOIA 1 52#define NFS_PARANOIA 1
52 53
53/* Maximum number of readahead requests
54 * FIXME: this should really be a sysctl so that users may tune it to suit
55 * their needs. People that do NFS over a slow network, might for
56 * instance want to reduce it to something closer to 1 for improved
57 * interactive response.
58 */
59#define NFS_MAX_READAHEAD (RPC_DEF_SLOT_TABLE - 1)
60
61static void nfs_invalidate_inode(struct inode *); 54static void nfs_invalidate_inode(struct inode *);
62static int nfs_update_inode(struct inode *, struct nfs_fattr *); 55static int nfs_update_inode(struct inode *, struct nfs_fattr *);
63 56
64static struct inode *nfs_alloc_inode(struct super_block *sb);
65static void nfs_destroy_inode(struct inode *);
66static int nfs_write_inode(struct inode *,int);
67static void nfs_clear_inode(struct inode *);
68static void nfs_umount_begin(struct vfsmount *, int);
69static int nfs_statfs(struct super_block *, struct kstatfs *);
70static int nfs_show_options(struct seq_file *, struct vfsmount *);
71static int nfs_show_stats(struct seq_file *, struct vfsmount *);
72static void nfs_zap_acl_cache(struct inode *); 57static void nfs_zap_acl_cache(struct inode *);
73 58
74static struct rpc_program nfs_program; 59static kmem_cache_t * nfs_inode_cachep;
75
76static struct super_operations nfs_sops = {
77 .alloc_inode = nfs_alloc_inode,
78 .destroy_inode = nfs_destroy_inode,
79 .write_inode = nfs_write_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;
@@ -146,8 +75,7 @@ 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_clear_inode(struct inode *inode)
151{ 79{
152 struct nfs_inode *nfsi = NFS_I(inode); 80 struct nfs_inode *nfsi = NFS_I(inode);
153 struct rpc_cred *cred; 81 struct rpc_cred *cred;
@@ -164,566 +92,6 @@ nfs_clear_inode(struct inode *inode)
164 BUG_ON(atomic_read(&nfsi->data_updates) != 0); 92 BUG_ON(atomic_read(&nfsi->data_updates) != 0);
165} 93}
166 94
167static void nfs_umount_begin(struct vfsmount *vfsmnt, int flags)
168{
169 struct nfs_server *server;
170 struct rpc_clnt *rpc;
171
172 shrink_submounts(vfsmnt, &nfs_automount_list);
173 if (!(flags & MNT_FORCE))
174 return;
175 /* -EIO all pending I/O */
176 server = NFS_SB(vfsmnt->mnt_sb);
177 rpc = server->client;
178 if (!IS_ERR(rpc))
179 rpc_killall_tasks(rpc);
180 rpc = server->client_acl;
181 if (!IS_ERR(rpc))
182 rpc_killall_tasks(rpc);
183}
184
185
186static inline unsigned long
187nfs_block_bits(unsigned long bsize, unsigned char *nrbitsp)
188{
189 /* make sure blocksize is a power of two */
190 if ((bsize & (bsize - 1)) || nrbitsp) {
191 unsigned char nrbits;
192
193 for (nrbits = 31; nrbits && !(bsize & (1 << nrbits)); nrbits--)
194 ;
195 bsize = 1 << nrbits;
196 if (nrbitsp)
197 *nrbitsp = nrbits;
198 }
199
200 return bsize;
201}
202
203/*
204 * Calculate the number of 512byte blocks used.
205 */
206static inline unsigned long
207nfs_calc_block_size(u64 tsize)
208{
209 loff_t used = (tsize + 511) >> 9;
210 return (used > ULONG_MAX) ? ULONG_MAX : used;
211}
212
213/*
214 * Compute and set NFS server blocksize
215 */
216static inline unsigned long
217nfs_block_size(unsigned long bsize, unsigned char *nrbitsp)
218{
219 if (bsize < NFS_MIN_FILE_IO_SIZE)
220 bsize = NFS_DEF_FILE_IO_SIZE;
221 else if (bsize >= NFS_MAX_FILE_IO_SIZE)
222 bsize = NFS_MAX_FILE_IO_SIZE;
223
224 return nfs_block_bits(bsize, nrbitsp);
225}
226
227static inline void
228nfs_super_set_maxbytes(struct super_block *sb, __u64 maxfilesize)
229{
230 sb->s_maxbytes = (loff_t)maxfilesize;
231 if (sb->s_maxbytes > MAX_LFS_FILESIZE || sb->s_maxbytes <= 0)
232 sb->s_maxbytes = MAX_LFS_FILESIZE;
233}
234
235/*
236 * Obtain the root inode of the file system.
237 */
238static struct inode *
239nfs_get_root(struct super_block *sb, struct nfs_fh *rootfh, struct nfs_fsinfo *fsinfo)
240{
241 struct nfs_server *server = NFS_SB(sb);
242 int error;
243
244 error = server->rpc_ops->getroot(server, rootfh, fsinfo);
245 if (error < 0) {
246 dprintk("nfs_get_root: getattr error = %d\n", -error);
247 return ERR_PTR(error);
248 }
249
250 server->fsid = fsinfo->fattr->fsid;
251 return nfs_fhget(sb, rootfh, fsinfo->fattr);
252}
253
254/*
255 * Do NFS version-independent mount processing, and sanity checking
256 */
257static int
258nfs_sb_init(struct super_block *sb, rpc_authflavor_t authflavor)
259{
260 struct nfs_server *server;
261 struct inode *root_inode;
262 struct nfs_fattr fattr;
263 struct nfs_fsinfo fsinfo = {
264 .fattr = &fattr,
265 };
266 struct nfs_pathconf pathinfo = {
267 .fattr = &fattr,
268 };
269 int no_root_error = 0;
270 unsigned long max_rpc_payload;
271
272 /* We probably want something more informative here */
273 snprintf(sb->s_id, sizeof(sb->s_id), "%x:%x", MAJOR(sb->s_dev), MINOR(sb->s_dev));
274
275 server = NFS_SB(sb);
276
277 sb->s_magic = NFS_SUPER_MAGIC;
278
279 server->io_stats = nfs_alloc_iostats();
280 if (server->io_stats == NULL)
281 return -ENOMEM;
282
283 root_inode = nfs_get_root(sb, &server->fh, &fsinfo);
284 /* Did getting the root inode fail? */
285 if (IS_ERR(root_inode)) {
286 no_root_error = PTR_ERR(root_inode);
287 goto out_no_root;
288 }
289 sb->s_root = d_alloc_root(root_inode);
290 if (!sb->s_root) {
291 no_root_error = -ENOMEM;
292 goto out_no_root;
293 }
294 sb->s_root->d_op = server->rpc_ops->dentry_ops;
295
296 /* mount time stamp, in seconds */
297 server->mount_time = jiffies;
298
299 /* Get some general file system info */
300 if (server->namelen == 0 &&
301 server->rpc_ops->pathconf(server, &server->fh, &pathinfo) >= 0)
302 server->namelen = pathinfo.max_namelen;
303 /* Work out a lot of parameters */
304 if (server->rsize == 0)
305 server->rsize = nfs_block_size(fsinfo.rtpref, NULL);
306 if (server->wsize == 0)
307 server->wsize = nfs_block_size(fsinfo.wtpref, NULL);
308
309 if (fsinfo.rtmax >= 512 && server->rsize > fsinfo.rtmax)
310 server->rsize = nfs_block_size(fsinfo.rtmax, NULL);
311 if (fsinfo.wtmax >= 512 && server->wsize > fsinfo.wtmax)
312 server->wsize = nfs_block_size(fsinfo.wtmax, NULL);
313
314 max_rpc_payload = nfs_block_size(rpc_max_payload(server->client), NULL);
315 if (server->rsize > max_rpc_payload)
316 server->rsize = max_rpc_payload;
317 if (server->rsize > NFS_MAX_FILE_IO_SIZE)
318 server->rsize = NFS_MAX_FILE_IO_SIZE;
319 server->rpages = (server->rsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
320
321 if (server->wsize > max_rpc_payload)
322 server->wsize = max_rpc_payload;
323 if (server->wsize > NFS_MAX_FILE_IO_SIZE)
324 server->wsize = NFS_MAX_FILE_IO_SIZE;
325 server->wpages = (server->wsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
326
327 if (sb->s_blocksize == 0)
328 sb->s_blocksize = nfs_block_bits(server->wsize,
329 &sb->s_blocksize_bits);
330 server->wtmult = nfs_block_bits(fsinfo.wtmult, NULL);
331
332 server->dtsize = nfs_block_size(fsinfo.dtpref, NULL);
333 if (server->dtsize > PAGE_CACHE_SIZE)
334 server->dtsize = PAGE_CACHE_SIZE;
335 if (server->dtsize > server->rsize)
336 server->dtsize = server->rsize;
337
338 if (server->flags & NFS_MOUNT_NOAC) {
339 server->acregmin = server->acregmax = 0;
340 server->acdirmin = server->acdirmax = 0;
341 sb->s_flags |= MS_SYNCHRONOUS;
342 }
343 server->backing_dev_info.ra_pages = server->rpages * NFS_MAX_READAHEAD;
344
345 nfs_super_set_maxbytes(sb, fsinfo.maxfilesize);
346
347 server->client->cl_intr = (server->flags & NFS_MOUNT_INTR) ? 1 : 0;
348 server->client->cl_softrtry = (server->flags & NFS_MOUNT_SOFT) ? 1 : 0;
349
350 /* We're airborne Set socket buffersize */
351 rpc_setbufsize(server->client, server->wsize + 100, server->rsize + 100);
352 return 0;
353 /* Yargs. It didn't work out. */
354out_no_root:
355 dprintk("nfs_sb_init: get root inode failed: errno %d\n", -no_root_error);
356 if (!IS_ERR(root_inode))
357 iput(root_inode);
358 return no_root_error;
359}
360
361static void nfs_init_timeout_values(struct rpc_timeout *to, int proto, unsigned int timeo, unsigned int retrans)
362{
363 to->to_initval = timeo * HZ / 10;
364 to->to_retries = retrans;
365 if (!to->to_retries)
366 to->to_retries = 2;
367
368 switch (proto) {
369 case IPPROTO_TCP:
370 if (!to->to_initval)
371 to->to_initval = 60 * HZ;
372 if (to->to_initval > NFS_MAX_TCP_TIMEOUT)
373 to->to_initval = NFS_MAX_TCP_TIMEOUT;
374 to->to_increment = to->to_initval;
375 to->to_maxval = to->to_initval + (to->to_increment * to->to_retries);
376 to->to_exponential = 0;
377 break;
378 case IPPROTO_UDP:
379 default:
380 if (!to->to_initval)
381 to->to_initval = 11 * HZ / 10;
382 if (to->to_initval > NFS_MAX_UDP_TIMEOUT)
383 to->to_initval = NFS_MAX_UDP_TIMEOUT;
384 to->to_maxval = NFS_MAX_UDP_TIMEOUT;
385 to->to_exponential = 1;
386 break;
387 }
388}
389
390/*
391 * Create an RPC client handle.
392 */
393static struct rpc_clnt *
394nfs_create_client(struct nfs_server *server, const struct nfs_mount_data *data)
395{
396 struct rpc_timeout timeparms;
397 struct rpc_xprt *xprt = NULL;
398 struct rpc_clnt *clnt = NULL;
399 int proto = (data->flags & NFS_MOUNT_TCP) ? IPPROTO_TCP : IPPROTO_UDP;
400
401 nfs_init_timeout_values(&timeparms, proto, data->timeo, data->retrans);
402
403 server->retrans_timeo = timeparms.to_initval;
404 server->retrans_count = timeparms.to_retries;
405
406 /* create transport and client */
407 xprt = xprt_create_proto(proto, &server->addr, &timeparms);
408 if (IS_ERR(xprt)) {
409 dprintk("%s: cannot create RPC transport. Error = %ld\n",
410 __FUNCTION__, PTR_ERR(xprt));
411 return (struct rpc_clnt *)xprt;
412 }
413 clnt = rpc_create_client(xprt, server->hostname, &nfs_program,
414 server->rpc_ops->version, data->pseudoflavor);
415 if (IS_ERR(clnt)) {
416 dprintk("%s: cannot create RPC client. Error = %ld\n",
417 __FUNCTION__, PTR_ERR(xprt));
418 goto out_fail;
419 }
420
421 clnt->cl_intr = 1;
422 clnt->cl_softrtry = 1;
423
424 return clnt;
425
426out_fail:
427 return clnt;
428}
429
430/*
431 * The way this works is that the mount process passes a structure
432 * in the data argument which contains the server's IP address
433 * and the root file handle obtained from the server's mount
434 * daemon. We stash these away in the private superblock fields.
435 */
436static int
437nfs_fill_super(struct super_block *sb, struct nfs_mount_data *data, int silent)
438{
439 struct nfs_server *server;
440 rpc_authflavor_t authflavor;
441
442 server = NFS_SB(sb);
443 sb->s_blocksize_bits = 0;
444 sb->s_blocksize = 0;
445 if (data->bsize)
446 sb->s_blocksize = nfs_block_size(data->bsize, &sb->s_blocksize_bits);
447 if (data->rsize)
448 server->rsize = nfs_block_size(data->rsize, NULL);
449 if (data->wsize)
450 server->wsize = nfs_block_size(data->wsize, NULL);
451 server->flags = data->flags & NFS_MOUNT_FLAGMASK;
452
453 server->acregmin = data->acregmin*HZ;
454 server->acregmax = data->acregmax*HZ;
455 server->acdirmin = data->acdirmin*HZ;
456 server->acdirmax = data->acdirmax*HZ;
457
458 /* Start lockd here, before we might error out */
459 if (!(server->flags & NFS_MOUNT_NONLM))
460 lockd_up();
461
462 server->namelen = data->namlen;
463 server->hostname = kmalloc(strlen(data->hostname) + 1, GFP_KERNEL);
464 if (!server->hostname)
465 return -ENOMEM;
466 strcpy(server->hostname, data->hostname);
467
468 /* Check NFS protocol revision and initialize RPC op vector
469 * and file handle pool. */
470#ifdef CONFIG_NFS_V3
471 if (server->flags & NFS_MOUNT_VER3) {
472 server->rpc_ops = &nfs_v3_clientops;
473 server->caps |= NFS_CAP_READDIRPLUS;
474 } else {
475 server->rpc_ops = &nfs_v2_clientops;
476 }
477#else
478 server->rpc_ops = &nfs_v2_clientops;
479#endif
480
481 /* Fill in pseudoflavor for mount version < 5 */
482 if (!(data->flags & NFS_MOUNT_SECFLAVOUR))
483 data->pseudoflavor = RPC_AUTH_UNIX;
484 authflavor = data->pseudoflavor; /* save for sb_init() */
485 /* XXX maybe we want to add a server->pseudoflavor field */
486
487 /* Create RPC client handles */
488 server->client = nfs_create_client(server, data);
489 if (IS_ERR(server->client))
490 return PTR_ERR(server->client);
491 /* RFC 2623, sec 2.3.2 */
492 if (authflavor != RPC_AUTH_UNIX) {
493 struct rpc_auth *auth;
494
495 server->client_sys = rpc_clone_client(server->client);
496 if (IS_ERR(server->client_sys))
497 return PTR_ERR(server->client_sys);
498 auth = rpcauth_create(RPC_AUTH_UNIX, server->client_sys);
499 if (IS_ERR(auth))
500 return PTR_ERR(auth);
501 } else {
502 atomic_inc(&server->client->cl_count);
503 server->client_sys = server->client;
504 }
505 if (server->flags & NFS_MOUNT_VER3) {
506#ifdef CONFIG_NFS_V3_ACL
507 if (!(server->flags & NFS_MOUNT_NOACL)) {
508 server->client_acl = rpc_bind_new_program(server->client, &nfsacl_program, 3);
509 /* No errors! Assume that Sun nfsacls are supported */
510 if (!IS_ERR(server->client_acl))
511 server->caps |= NFS_CAP_ACLS;
512 }
513#else
514 server->flags &= ~NFS_MOUNT_NOACL;
515#endif /* CONFIG_NFS_V3_ACL */
516 /*
517 * The VFS shouldn't apply the umask to mode bits. We will
518 * do so ourselves when necessary.
519 */
520 sb->s_flags |= MS_POSIXACL;
521 if (server->namelen == 0 || server->namelen > NFS3_MAXNAMLEN)
522 server->namelen = NFS3_MAXNAMLEN;
523 sb->s_time_gran = 1;
524 } else {
525 if (server->namelen == 0 || server->namelen > NFS2_MAXNAMLEN)
526 server->namelen = NFS2_MAXNAMLEN;
527 }
528
529 sb->s_op = &nfs_sops;
530 return nfs_sb_init(sb, authflavor);
531}
532
533static int
534nfs_statfs(struct super_block *sb, struct kstatfs *buf)
535{
536 struct nfs_server *server = NFS_SB(sb);
537 unsigned char blockbits;
538 unsigned long blockres;
539 struct nfs_fh *rootfh = NFS_FH(sb->s_root->d_inode);
540 struct nfs_fattr fattr;
541 struct nfs_fsstat res = {
542 .fattr = &fattr,
543 };
544 int error;
545
546 lock_kernel();
547
548 error = server->rpc_ops->statfs(server, rootfh, &res);
549 buf->f_type = NFS_SUPER_MAGIC;
550 if (error < 0)
551 goto out_err;
552
553 /*
554 * Current versions of glibc do not correctly handle the
555 * case where f_frsize != f_bsize. Eventually we want to
556 * report the value of wtmult in this field.
557 */
558 buf->f_frsize = sb->s_blocksize;
559
560 /*
561 * On most *nix systems, f_blocks, f_bfree, and f_bavail
562 * are reported in units of f_frsize. Linux hasn't had
563 * an f_frsize field in its statfs struct until recently,
564 * thus historically Linux's sys_statfs reports these
565 * fields in units of f_bsize.
566 */
567 buf->f_bsize = sb->s_blocksize;
568 blockbits = sb->s_blocksize_bits;
569 blockres = (1 << blockbits) - 1;
570 buf->f_blocks = (res.tbytes + blockres) >> blockbits;
571 buf->f_bfree = (res.fbytes + blockres) >> blockbits;
572 buf->f_bavail = (res.abytes + blockres) >> blockbits;
573
574 buf->f_files = res.tfiles;
575 buf->f_ffree = res.afiles;
576
577 buf->f_namelen = server->namelen;
578 out:
579 unlock_kernel();
580 return 0;
581
582 out_err:
583 dprintk("%s: statfs error = %d\n", __FUNCTION__, -error);
584 buf->f_bsize = buf->f_blocks = buf->f_bfree = buf->f_bavail = -1;
585 goto out;
586
587}
588
589static void nfs_show_mount_options(struct seq_file *m, struct nfs_server *nfss, int showdefaults)
590{
591 static struct proc_nfs_info {
592 int flag;
593 char *str;
594 char *nostr;
595 } nfs_info[] = {
596 { NFS_MOUNT_SOFT, ",soft", ",hard" },
597 { NFS_MOUNT_INTR, ",intr", "" },
598 { NFS_MOUNT_NOCTO, ",nocto", "" },
599 { NFS_MOUNT_NOAC, ",noac", "" },
600 { NFS_MOUNT_NONLM, ",nolock", "" },
601 { NFS_MOUNT_NOACL, ",noacl", "" },
602 { 0, NULL, NULL }
603 };
604 struct proc_nfs_info *nfs_infop;
605 char buf[12];
606 char *proto;
607
608 seq_printf(m, ",vers=%d", nfss->rpc_ops->version);
609 seq_printf(m, ",rsize=%d", nfss->rsize);
610 seq_printf(m, ",wsize=%d", nfss->wsize);
611 if (nfss->acregmin != 3*HZ || showdefaults)
612 seq_printf(m, ",acregmin=%d", nfss->acregmin/HZ);
613 if (nfss->acregmax != 60*HZ || showdefaults)
614 seq_printf(m, ",acregmax=%d", nfss->acregmax/HZ);
615 if (nfss->acdirmin != 30*HZ || showdefaults)
616 seq_printf(m, ",acdirmin=%d", nfss->acdirmin/HZ);
617 if (nfss->acdirmax != 60*HZ || showdefaults)
618 seq_printf(m, ",acdirmax=%d", nfss->acdirmax/HZ);
619 for (nfs_infop = nfs_info; nfs_infop->flag; nfs_infop++) {
620 if (nfss->flags & nfs_infop->flag)
621 seq_puts(m, nfs_infop->str);
622 else
623 seq_puts(m, nfs_infop->nostr);
624 }
625 switch (nfss->client->cl_xprt->prot) {
626 case IPPROTO_TCP:
627 proto = "tcp";
628 break;
629 case IPPROTO_UDP:
630 proto = "udp";
631 break;
632 default:
633 snprintf(buf, sizeof(buf), "%u", nfss->client->cl_xprt->prot);
634 proto = buf;
635 }
636 seq_printf(m, ",proto=%s", proto);
637 seq_printf(m, ",timeo=%lu", 10U * nfss->retrans_timeo / HZ);
638 seq_printf(m, ",retrans=%u", nfss->retrans_count);
639}
640
641static int nfs_show_options(struct seq_file *m, struct vfsmount *mnt)
642{
643 struct nfs_server *nfss = NFS_SB(mnt->mnt_sb);
644
645 nfs_show_mount_options(m, nfss, 0);
646
647 seq_puts(m, ",addr=");
648 seq_escape(m, nfss->hostname, " \t\n\\");
649
650 return 0;
651}
652
653static int nfs_show_stats(struct seq_file *m, struct vfsmount *mnt)
654{
655 int i, cpu;
656 struct nfs_server *nfss = NFS_SB(mnt->mnt_sb);
657 struct rpc_auth *auth = nfss->client->cl_auth;
658 struct nfs_iostats totals = { };
659
660 seq_printf(m, "statvers=%s", NFS_IOSTAT_VERS);
661
662 /*
663 * Display all mount option settings
664 */
665 seq_printf(m, "\n\topts:\t");
666 seq_puts(m, mnt->mnt_sb->s_flags & MS_RDONLY ? "ro" : "rw");
667 seq_puts(m, mnt->mnt_sb->s_flags & MS_SYNCHRONOUS ? ",sync" : "");
668 seq_puts(m, mnt->mnt_sb->s_flags & MS_NOATIME ? ",noatime" : "");
669 seq_puts(m, mnt->mnt_sb->s_flags & MS_NODIRATIME ? ",nodiratime" : "");
670 nfs_show_mount_options(m, nfss, 1);
671
672 seq_printf(m, "\n\tage:\t%lu", (jiffies - nfss->mount_time) / HZ);
673
674 seq_printf(m, "\n\tcaps:\t");
675 seq_printf(m, "caps=0x%x", nfss->caps);
676 seq_printf(m, ",wtmult=%d", nfss->wtmult);
677 seq_printf(m, ",dtsize=%d", nfss->dtsize);
678 seq_printf(m, ",bsize=%d", nfss->bsize);
679 seq_printf(m, ",namelen=%d", nfss->namelen);
680
681#ifdef CONFIG_NFS_V4
682 if (nfss->rpc_ops->version == 4) {
683 seq_printf(m, "\n\tnfsv4:\t");
684 seq_printf(m, "bm0=0x%x", nfss->attr_bitmask[0]);
685 seq_printf(m, ",bm1=0x%x", nfss->attr_bitmask[1]);
686 seq_printf(m, ",acl=0x%x", nfss->acl_bitmask);
687 }
688#endif
689
690 /*
691 * Display security flavor in effect for this mount
692 */
693 seq_printf(m, "\n\tsec:\tflavor=%d", auth->au_ops->au_flavor);
694 if (auth->au_flavor)
695 seq_printf(m, ",pseudoflavor=%d", auth->au_flavor);
696
697 /*
698 * Display superblock I/O counters
699 */
700 for_each_possible_cpu(cpu) {
701 struct nfs_iostats *stats;
702
703 preempt_disable();
704 stats = per_cpu_ptr(nfss->io_stats, cpu);
705
706 for (i = 0; i < __NFSIOS_COUNTSMAX; i++)
707 totals.events[i] += stats->events[i];
708 for (i = 0; i < __NFSIOS_BYTESMAX; i++)
709 totals.bytes[i] += stats->bytes[i];
710
711 preempt_enable();
712 }
713
714 seq_printf(m, "\n\tevents:\t");
715 for (i = 0; i < __NFSIOS_COUNTSMAX; i++)
716 seq_printf(m, "%lu ", totals.events[i]);
717 seq_printf(m, "\n\tbytes:\t");
718 for (i = 0; i < __NFSIOS_BYTESMAX; i++)
719 seq_printf(m, "%Lu ", totals.bytes[i]);
720 seq_printf(m, "\n");
721
722 rpc_print_iostats(m, nfss->client);
723
724 return 0;
725}
726
727/** 95/**
728 * 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
729 */ 97 */
@@ -1663,371 +1031,15 @@ static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr)
1663 goto out_err; 1031 goto out_err;
1664} 1032}
1665 1033
1666/*
1667 * File system information
1668 */
1669
1670/*
1671 * nfs_path - reconstruct the path given an arbitrary dentry
1672 * @base - arbitrary string to prepend to the path
1673 * @dentry - pointer to dentry
1674 * @buffer - result buffer
1675 * @buflen - length of buffer
1676 *
1677 * Helper function for constructing the path from the
1678 * root dentry to an arbitrary hashed dentry.
1679 *
1680 * This is mainly for use in figuring out the path on the
1681 * server side when automounting on top of an existing partition.
1682 */
1683static char *nfs_path(const char *base, const struct dentry *dentry,
1684 char *buffer, ssize_t buflen)
1685{
1686 char *end = buffer+buflen;
1687 int namelen;
1688
1689 *--end = '\0';
1690 buflen--;
1691 spin_lock(&dcache_lock);
1692 while (!IS_ROOT(dentry)) {
1693 namelen = dentry->d_name.len;
1694 buflen -= namelen + 1;
1695 if (buflen < 0)
1696 goto Elong;
1697 end -= namelen;
1698 memcpy(end, dentry->d_name.name, namelen);
1699 *--end = '/';
1700 dentry = dentry->d_parent;
1701 }
1702 spin_unlock(&dcache_lock);
1703 namelen = strlen(base);
1704 /* Strip off excess slashes in base string */
1705 while (namelen > 0 && base[namelen - 1] == '/')
1706 namelen--;
1707 buflen -= namelen;
1708 if (buflen < 0)
1709 goto Elong;
1710 end -= namelen;
1711 memcpy(end, base, namelen);
1712 return end;
1713Elong:
1714 return ERR_PTR(-ENAMETOOLONG);
1715}
1716
1717struct nfs_clone_mount {
1718 const struct super_block *sb;
1719 const struct dentry *dentry;
1720 struct nfs_fh *fh;
1721 struct nfs_fattr *fattr;
1722 char *hostname;
1723 char *mnt_path;
1724 struct sockaddr_in *addr;
1725 rpc_authflavor_t authflavor;
1726};
1727
1728static struct super_block *nfs_clone_generic_sb(struct nfs_clone_mount *data,
1729 struct super_block *(*fill_sb)(struct nfs_server *, struct nfs_clone_mount *),
1730 struct nfs_server *(*fill_server)(struct super_block *, struct nfs_clone_mount *))
1731{
1732 struct nfs_server *server;
1733 struct nfs_server *parent = NFS_SB(data->sb);
1734 struct super_block *sb = ERR_PTR(-EINVAL);
1735 void *err = ERR_PTR(-ENOMEM);
1736 char *hostname;
1737 int len;
1738
1739 server = kmalloc(sizeof(struct nfs_server), GFP_KERNEL);
1740 if (server == NULL)
1741 goto out_err;
1742 memcpy(server, parent, sizeof(*server));
1743 hostname = (data->hostname != NULL) ? data->hostname : parent->hostname;
1744 len = strlen(hostname) + 1;
1745 server->hostname = kmalloc(len, GFP_KERNEL);
1746 if (server->hostname == NULL)
1747 goto free_server;
1748 memcpy(server->hostname, hostname, len);
1749 if (rpciod_up() != 0)
1750 goto free_hostname;
1751
1752 sb = fill_sb(server, data);
1753 if (IS_ERR((err = sb)) || sb->s_root)
1754 goto kill_rpciod;
1755
1756 server = fill_server(sb, data);
1757 if (IS_ERR((err = server)))
1758 goto out_deactivate;
1759 return sb;
1760out_deactivate:
1761 up_write(&sb->s_umount);
1762 deactivate_super(sb);
1763 return (struct super_block *)err;
1764kill_rpciod:
1765 rpciod_down();
1766free_hostname:
1767 kfree(server->hostname);
1768free_server:
1769 kfree(server);
1770out_err:
1771 return (struct super_block *)err;
1772}
1773
1774static int nfs_set_super(struct super_block *s, void *data)
1775{
1776 s->s_fs_info = data;
1777 return set_anon_super(s, data);
1778}
1779
1780static int nfs_compare_super(struct super_block *sb, void *data)
1781{
1782 struct nfs_server *server = data;
1783 struct nfs_server *old = NFS_SB(sb);
1784
1785 if (old->addr.sin_addr.s_addr != server->addr.sin_addr.s_addr)
1786 return 0;
1787 if (old->addr.sin_port != server->addr.sin_port)
1788 return 0;
1789 return !nfs_compare_fh(&old->fh, &server->fh);
1790}
1791
1792static struct super_block *nfs_get_sb(struct file_system_type *fs_type,
1793 int flags, const char *dev_name, void *raw_data)
1794{
1795 int error;
1796 struct nfs_server *server = NULL;
1797 struct super_block *s;
1798 struct nfs_fh *root;
1799 struct nfs_mount_data *data = raw_data;
1800
1801 s = ERR_PTR(-EINVAL);
1802 if (data == NULL) {
1803 dprintk("%s: missing data argument\n", __FUNCTION__);
1804 goto out_err;
1805 }
1806 if (data->version <= 0 || data->version > NFS_MOUNT_VERSION) {
1807 dprintk("%s: bad mount version\n", __FUNCTION__);
1808 goto out_err;
1809 }
1810 switch (data->version) {
1811 case 1:
1812 data->namlen = 0;
1813 case 2:
1814 data->bsize = 0;
1815 case 3:
1816 if (data->flags & NFS_MOUNT_VER3) {
1817 dprintk("%s: mount structure version %d does not support NFSv3\n",
1818 __FUNCTION__,
1819 data->version);
1820 goto out_err;
1821 }
1822 data->root.size = NFS2_FHSIZE;
1823 memcpy(data->root.data, data->old_root.data, NFS2_FHSIZE);
1824 case 4:
1825 if (data->flags & NFS_MOUNT_SECFLAVOUR) {
1826 dprintk("%s: mount structure version %d does not support strong security\n",
1827 __FUNCTION__,
1828 data->version);
1829 goto out_err;
1830 }
1831 case 5:
1832 memset(data->context, 0, sizeof(data->context));
1833 }
1834#ifndef CONFIG_NFS_V3
1835 /* If NFSv3 is not compiled in, return -EPROTONOSUPPORT */
1836 s = ERR_PTR(-EPROTONOSUPPORT);
1837 if (data->flags & NFS_MOUNT_VER3) {
1838 dprintk("%s: NFSv3 not compiled into kernel\n", __FUNCTION__);
1839 goto out_err;
1840 }
1841#endif /* CONFIG_NFS_V3 */
1842
1843 s = ERR_PTR(-ENOMEM);
1844 server = kzalloc(sizeof(struct nfs_server), GFP_KERNEL);
1845 if (!server)
1846 goto out_err;
1847 /* Zero out the NFS state stuff */
1848 init_nfsv4_state(server);
1849 server->client = server->client_sys = server->client_acl = ERR_PTR(-EINVAL);
1850
1851 root = &server->fh;
1852 if (data->flags & NFS_MOUNT_VER3)
1853 root->size = data->root.size;
1854 else
1855 root->size = NFS2_FHSIZE;
1856 s = ERR_PTR(-EINVAL);
1857 if (root->size > sizeof(root->data)) {
1858 dprintk("%s: invalid root filehandle\n", __FUNCTION__);
1859 goto out_err;
1860 }
1861 memcpy(root->data, data->root.data, root->size);
1862
1863 /* We now require that the mount process passes the remote address */
1864 memcpy(&server->addr, &data->addr, sizeof(server->addr));
1865 if (server->addr.sin_addr.s_addr == INADDR_ANY) {
1866 dprintk("%s: mount program didn't pass remote address!\n",
1867 __FUNCTION__);
1868 goto out_err;
1869 }
1870
1871 /* Fire up rpciod if not yet running */
1872 s = ERR_PTR(rpciod_up());
1873 if (IS_ERR(s)) {
1874 dprintk("%s: couldn't start rpciod! Error = %ld\n",
1875 __FUNCTION__, PTR_ERR(s));
1876 goto out_err;
1877 }
1878
1879 s = sget(fs_type, nfs_compare_super, nfs_set_super, server);
1880 if (IS_ERR(s) || s->s_root)
1881 goto out_rpciod_down;
1882
1883 s->s_flags = flags;
1884
1885 error = nfs_fill_super(s, data, flags & MS_SILENT ? 1 : 0);
1886 if (error) {
1887 up_write(&s->s_umount);
1888 deactivate_super(s);
1889 return ERR_PTR(error);
1890 }
1891 s->s_flags |= MS_ACTIVE;
1892 return s;
1893out_rpciod_down:
1894 rpciod_down();
1895out_err:
1896 kfree(server);
1897 return s;
1898}
1899
1900static void nfs_kill_super(struct super_block *s)
1901{
1902 struct nfs_server *server = NFS_SB(s);
1903
1904 kill_anon_super(s);
1905
1906 if (!IS_ERR(server->client))
1907 rpc_shutdown_client(server->client);
1908 if (!IS_ERR(server->client_sys))
1909 rpc_shutdown_client(server->client_sys);
1910 if (!IS_ERR(server->client_acl))
1911 rpc_shutdown_client(server->client_acl);
1912
1913 if (!(server->flags & NFS_MOUNT_NONLM))
1914 lockd_down(); /* release rpc.lockd */
1915
1916 rpciod_down(); /* release rpciod */
1917
1918 nfs_free_iostats(server->io_stats);
1919 kfree(server->hostname);
1920 kfree(server);
1921 nfs_release_automount_timer();
1922}
1923
1924static struct file_system_type nfs_fs_type = {
1925 .owner = THIS_MODULE,
1926 .name = "nfs",
1927 .get_sb = nfs_get_sb,
1928 .kill_sb = nfs_kill_super,
1929 .fs_flags = FS_ODD_RENAME|FS_REVAL_DOT|FS_BINARY_MOUNTDATA,
1930};
1931
1932static struct super_block *nfs_clone_sb(struct nfs_server *server, struct nfs_clone_mount *data)
1933{
1934 struct super_block *sb;
1935
1936 server->fsid = data->fattr->fsid;
1937 nfs_copy_fh(&server->fh, data->fh);
1938 sb = sget(&nfs_fs_type, nfs_compare_super, nfs_set_super, server);
1939 if (!IS_ERR(sb) && sb->s_root == NULL && !(server->flags & NFS_MOUNT_NONLM))
1940 lockd_up();
1941 return sb;
1942}
1943
1944static struct nfs_server *nfs_clone_server(struct super_block *sb, struct nfs_clone_mount *data)
1945{
1946 struct nfs_server *server = NFS_SB(sb);
1947 struct nfs_server *parent = NFS_SB(data->sb);
1948 struct inode *root_inode;
1949 struct nfs_fsinfo fsinfo;
1950 void *err = ERR_PTR(-ENOMEM);
1951
1952 sb->s_op = data->sb->s_op;
1953 sb->s_blocksize = data->sb->s_blocksize;
1954 sb->s_blocksize_bits = data->sb->s_blocksize_bits;
1955 sb->s_maxbytes = data->sb->s_maxbytes;
1956
1957 server->client_sys = server->client_acl = ERR_PTR(-EINVAL);
1958 server->io_stats = nfs_alloc_iostats();
1959 if (server->io_stats == NULL)
1960 goto out;
1961
1962 server->client = rpc_clone_client(parent->client);
1963 if (IS_ERR((err = server->client)))
1964 goto out;
1965
1966 if (!IS_ERR(parent->client_sys)) {
1967 server->client_sys = rpc_clone_client(parent->client_sys);
1968 if (IS_ERR((err = server->client_sys)))
1969 goto out;
1970 }
1971 if (!IS_ERR(parent->client_acl)) {
1972 server->client_acl = rpc_clone_client(parent->client_acl);
1973 if (IS_ERR((err = server->client_acl)))
1974 goto out;
1975 }
1976 root_inode = nfs_fhget(sb, data->fh, data->fattr);
1977 if (!root_inode)
1978 goto out;
1979 sb->s_root = d_alloc_root(root_inode);
1980 if (!sb->s_root)
1981 goto out_put_root;
1982 fsinfo.fattr = data->fattr;
1983 if (NFS_PROTO(root_inode)->fsinfo(server, data->fh, &fsinfo) == 0)
1984 nfs_super_set_maxbytes(sb, fsinfo.maxfilesize);
1985 sb->s_root->d_op = server->rpc_ops->dentry_ops;
1986 sb->s_flags |= MS_ACTIVE;
1987 return server;
1988out_put_root:
1989 iput(root_inode);
1990out:
1991 return err;
1992}
1993
1994static struct super_block *nfs_clone_nfs_sb(struct file_system_type *fs_type,
1995 int flags, const char *dev_name, void *raw_data)
1996{
1997 struct nfs_clone_mount *data = raw_data;
1998 return nfs_clone_generic_sb(data, nfs_clone_sb, nfs_clone_server);
1999}
2000
2001static struct file_system_type clone_nfs_fs_type = {
2002 .owner = THIS_MODULE,
2003 .name = "nfs",
2004 .get_sb = nfs_clone_nfs_sb,
2005 .kill_sb = nfs_kill_super,
2006 .fs_flags = FS_ODD_RENAME|FS_REVAL_DOT|FS_BINARY_MOUNTDATA,
2007};
2008 1034
2009#ifdef CONFIG_NFS_V4 1035#ifdef CONFIG_NFS_V4
2010 1036
2011static void nfs4_clear_inode(struct inode *);
2012
2013
2014static struct super_operations nfs4_sops = {
2015 .alloc_inode = nfs_alloc_inode,
2016 .destroy_inode = nfs_destroy_inode,
2017 .write_inode = nfs_write_inode,
2018 .statfs = nfs_statfs,
2019 .clear_inode = nfs4_clear_inode,
2020 .umount_begin = nfs_umount_begin,
2021 .show_options = nfs_show_options,
2022 .show_stats = nfs_show_stats,
2023};
2024
2025/* 1037/*
2026 * 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
2027 * 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
2028 * nfs_open(). 1040 * nfs_open().
2029 */ 1041 */
2030static void nfs4_clear_inode(struct inode *inode) 1042void nfs4_clear_inode(struct inode *inode)
2031{ 1043{
2032 struct nfs_inode *nfsi = NFS_I(inode); 1044 struct nfs_inode *nfsi = NFS_I(inode);
2033 1045
@@ -2051,774 +1063,9 @@ static void nfs4_clear_inode(struct inode *inode)
2051 nfs4_close_state(state, state->state); 1063 nfs4_close_state(state, state->state);
2052 } 1064 }
2053} 1065}
2054
2055
2056static struct rpc_clnt *nfs4_create_client(struct nfs_server *server,
2057 struct rpc_timeout *timeparms, int proto, rpc_authflavor_t flavor)
2058{
2059 struct nfs4_client *clp;
2060 struct rpc_xprt *xprt = NULL;
2061 struct rpc_clnt *clnt = NULL;
2062 int err = -EIO;
2063
2064 clp = nfs4_get_client(&server->addr.sin_addr);
2065 if (!clp) {
2066 dprintk("%s: failed to create NFS4 client.\n", __FUNCTION__);
2067 return ERR_PTR(err);
2068 }
2069
2070 /* Now create transport and client */
2071 down_write(&clp->cl_sem);
2072 if (IS_ERR(clp->cl_rpcclient)) {
2073 xprt = xprt_create_proto(proto, &server->addr, timeparms);
2074 if (IS_ERR(xprt)) {
2075 up_write(&clp->cl_sem);
2076 err = PTR_ERR(xprt);
2077 dprintk("%s: cannot create RPC transport. Error = %d\n",
2078 __FUNCTION__, err);
2079 goto out_fail;
2080 }
2081 /* Bind to a reserved port! */
2082 xprt->resvport = 1;
2083 clnt = rpc_create_client(xprt, server->hostname, &nfs_program,
2084 server->rpc_ops->version, flavor);
2085 if (IS_ERR(clnt)) {
2086 up_write(&clp->cl_sem);
2087 err = PTR_ERR(clnt);
2088 dprintk("%s: cannot create RPC client. Error = %d\n",
2089 __FUNCTION__, err);
2090 goto out_fail;
2091 }
2092 clnt->cl_intr = 1;
2093 clnt->cl_softrtry = 1;
2094 clp->cl_rpcclient = clnt;
2095 memcpy(clp->cl_ipaddr, server->ip_addr, sizeof(clp->cl_ipaddr));
2096 nfs_idmap_new(clp);
2097 }
2098 list_add_tail(&server->nfs4_siblings, &clp->cl_superblocks);
2099 clnt = rpc_clone_client(clp->cl_rpcclient);
2100 if (!IS_ERR(clnt))
2101 server->nfs4_state = clp;
2102 up_write(&clp->cl_sem);
2103 clp = NULL;
2104
2105 if (IS_ERR(clnt)) {
2106 dprintk("%s: cannot create RPC client. Error = %d\n",
2107 __FUNCTION__, err);
2108 return clnt;
2109 }
2110
2111 if (server->nfs4_state->cl_idmap == NULL) {
2112 dprintk("%s: failed to create idmapper.\n", __FUNCTION__);
2113 return ERR_PTR(-ENOMEM);
2114 }
2115
2116 if (clnt->cl_auth->au_flavor != flavor) {
2117 struct rpc_auth *auth;
2118
2119 auth = rpcauth_create(flavor, clnt);
2120 if (IS_ERR(auth)) {
2121 dprintk("%s: couldn't create credcache!\n", __FUNCTION__);
2122 return (struct rpc_clnt *)auth;
2123 }
2124 }
2125 return clnt;
2126
2127 out_fail:
2128 if (clp)
2129 nfs4_put_client(clp);
2130 return ERR_PTR(err);
2131}
2132
2133static int nfs4_fill_super(struct super_block *sb, struct nfs4_mount_data *data, int silent)
2134{
2135 struct nfs_server *server;
2136 struct rpc_timeout timeparms;
2137 rpc_authflavor_t authflavour;
2138 int err = -EIO;
2139
2140 sb->s_blocksize_bits = 0;
2141 sb->s_blocksize = 0;
2142 server = NFS_SB(sb);
2143 if (data->rsize != 0)
2144 server->rsize = nfs_block_size(data->rsize, NULL);
2145 if (data->wsize != 0)
2146 server->wsize = nfs_block_size(data->wsize, NULL);
2147 server->flags = data->flags & NFS_MOUNT_FLAGMASK;
2148 server->caps = NFS_CAP_ATOMIC_OPEN;
2149
2150 server->acregmin = data->acregmin*HZ;
2151 server->acregmax = data->acregmax*HZ;
2152 server->acdirmin = data->acdirmin*HZ;
2153 server->acdirmax = data->acdirmax*HZ;
2154
2155 server->rpc_ops = &nfs_v4_clientops;
2156
2157 nfs_init_timeout_values(&timeparms, data->proto, data->timeo, data->retrans);
2158
2159 server->retrans_timeo = timeparms.to_initval;
2160 server->retrans_count = timeparms.to_retries;
2161
2162 /* Now create transport and client */
2163 authflavour = RPC_AUTH_UNIX;
2164 if (data->auth_flavourlen != 0) {
2165 if (data->auth_flavourlen != 1) {
2166 dprintk("%s: Invalid number of RPC auth flavours %d.\n",
2167 __FUNCTION__, data->auth_flavourlen);
2168 err = -EINVAL;
2169 goto out_fail;
2170 }
2171 if (copy_from_user(&authflavour, data->auth_flavours, sizeof(authflavour))) {
2172 err = -EFAULT;
2173 goto out_fail;
2174 }
2175 }
2176
2177 server->client = nfs4_create_client(server, &timeparms, data->proto, authflavour);
2178 if (IS_ERR(server->client)) {
2179 err = PTR_ERR(server->client);
2180 dprintk("%s: cannot create RPC client. Error = %d\n",
2181 __FUNCTION__, err);
2182 goto out_fail;
2183 }
2184
2185 sb->s_time_gran = 1;
2186
2187 sb->s_op = &nfs4_sops;
2188 err = nfs_sb_init(sb, authflavour);
2189
2190 out_fail:
2191 return err;
2192}
2193
2194static int nfs4_compare_super(struct super_block *sb, void *data)
2195{
2196 struct nfs_server *server = data;
2197 struct nfs_server *old = NFS_SB(sb);
2198
2199 if (strcmp(server->hostname, old->hostname) != 0)
2200 return 0;
2201 if (strcmp(server->mnt_path, old->mnt_path) != 0)
2202 return 0;
2203 return 1;
2204}
2205
2206static void *
2207nfs_copy_user_string(char *dst, struct nfs_string *src, int maxlen)
2208{
2209 void *p = NULL;
2210
2211 if (!src->len)
2212 return ERR_PTR(-EINVAL);
2213 if (src->len < maxlen)
2214 maxlen = src->len;
2215 if (dst == NULL) {
2216 p = dst = kmalloc(maxlen + 1, GFP_KERNEL);
2217 if (p == NULL)
2218 return ERR_PTR(-ENOMEM);
2219 }
2220 if (copy_from_user(dst, src->data, maxlen)) {
2221 kfree(p);
2222 return ERR_PTR(-EFAULT);
2223 }
2224 dst[maxlen] = '\0';
2225 return dst;
2226}
2227
2228static struct super_block *nfs4_get_sb(struct file_system_type *fs_type,
2229 int flags, const char *dev_name, void *raw_data)
2230{
2231 int error;
2232 struct nfs_server *server;
2233 struct super_block *s;
2234 struct nfs4_mount_data *data = raw_data;
2235 void *p;
2236
2237 if (data == NULL) {
2238 dprintk("%s: missing data argument\n", __FUNCTION__);
2239 return ERR_PTR(-EINVAL);
2240 }
2241 if (data->version <= 0 || data->version > NFS4_MOUNT_VERSION) {
2242 dprintk("%s: bad mount version\n", __FUNCTION__);
2243 return ERR_PTR(-EINVAL);
2244 }
2245
2246 server = kzalloc(sizeof(struct nfs_server), GFP_KERNEL);
2247 if (!server)
2248 return ERR_PTR(-ENOMEM);
2249 /* Zero out the NFS state stuff */
2250 init_nfsv4_state(server);
2251 server->client = server->client_sys = server->client_acl = ERR_PTR(-EINVAL);
2252
2253 p = nfs_copy_user_string(NULL, &data->hostname, 256);
2254 if (IS_ERR(p))
2255 goto out_err;
2256 server->hostname = p;
2257
2258 p = nfs_copy_user_string(NULL, &data->mnt_path, 1024);
2259 if (IS_ERR(p))
2260 goto out_err;
2261 server->mnt_path = p;
2262
2263 p = nfs_copy_user_string(server->ip_addr, &data->client_addr,
2264 sizeof(server->ip_addr) - 1);
2265 if (IS_ERR(p))
2266 goto out_err;
2267
2268 /* We now require that the mount process passes the remote address */
2269 if (data->host_addrlen != sizeof(server->addr)) {
2270 s = ERR_PTR(-EINVAL);
2271 goto out_free;
2272 }
2273 if (copy_from_user(&server->addr, data->host_addr, sizeof(server->addr))) {
2274 s = ERR_PTR(-EFAULT);
2275 goto out_free;
2276 }
2277 if (server->addr.sin_family != AF_INET ||
2278 server->addr.sin_addr.s_addr == INADDR_ANY) {
2279 dprintk("%s: mount program didn't pass remote IP address!\n",
2280 __FUNCTION__);
2281 s = ERR_PTR(-EINVAL);
2282 goto out_free;
2283 }
2284
2285 /* Fire up rpciod if not yet running */
2286 s = ERR_PTR(rpciod_up());
2287 if (IS_ERR(s)) {
2288 dprintk("%s: couldn't start rpciod! Error = %ld\n",
2289 __FUNCTION__, PTR_ERR(s));
2290 goto out_free;
2291 }
2292
2293 s = sget(fs_type, nfs4_compare_super, nfs_set_super, server);
2294
2295 if (IS_ERR(s) || s->s_root)
2296 goto out_free;
2297
2298 s->s_flags = flags;
2299
2300 error = nfs4_fill_super(s, data, flags & MS_SILENT ? 1 : 0);
2301 if (error) {
2302 up_write(&s->s_umount);
2303 deactivate_super(s);
2304 return ERR_PTR(error);
2305 }
2306 s->s_flags |= MS_ACTIVE;
2307 return s;
2308out_err:
2309 s = (struct super_block *)p;
2310out_free:
2311 kfree(server->mnt_path);
2312 kfree(server->hostname);
2313 kfree(server);
2314 return s;
2315}
2316
2317static void nfs4_kill_super(struct super_block *sb)
2318{
2319 struct nfs_server *server = NFS_SB(sb);
2320
2321 nfs_return_all_delegations(sb);
2322 kill_anon_super(sb);
2323
2324 nfs4_renewd_prepare_shutdown(server);
2325
2326 if (server->client != NULL && !IS_ERR(server->client))
2327 rpc_shutdown_client(server->client);
2328
2329 destroy_nfsv4_state(server);
2330
2331 rpciod_down();
2332
2333 nfs_free_iostats(server->io_stats);
2334 kfree(server->hostname);
2335 kfree(server);
2336 nfs_release_automount_timer();
2337}
2338
2339static struct file_system_type nfs4_fs_type = {
2340 .owner = THIS_MODULE,
2341 .name = "nfs4",
2342 .get_sb = nfs4_get_sb,
2343 .kill_sb = nfs4_kill_super,
2344 .fs_flags = FS_ODD_RENAME|FS_REVAL_DOT|FS_BINARY_MOUNTDATA,
2345};
2346
2347static const int nfs_set_port_min = 0;
2348static const int nfs_set_port_max = 65535;
2349static int param_set_port(const char *val, struct kernel_param *kp)
2350{
2351 char *endp;
2352 int num = simple_strtol(val, &endp, 0);
2353 if (endp == val || *endp || num < nfs_set_port_min || num > nfs_set_port_max)
2354 return -EINVAL;
2355 *((int *)kp->arg) = num;
2356 return 0;
2357}
2358
2359module_param_call(callback_tcpport, param_set_port, param_get_int,
2360 &nfs_callback_set_tcpport, 0644);
2361
2362static int param_set_idmap_timeout(const char *val, struct kernel_param *kp)
2363{
2364 char *endp;
2365 int num = simple_strtol(val, &endp, 0);
2366 int jif = num * HZ;
2367 if (endp == val || *endp || num < 0 || jif < num)
2368 return -EINVAL;
2369 *((int *)kp->arg) = jif;
2370 return 0;
2371}
2372
2373module_param_call(idmap_cache_timeout, param_set_idmap_timeout, param_get_int,
2374 &nfs_idmap_cache_timeout, 0644);
2375
2376/* Constructs the SERVER-side path */
2377static inline char *nfs4_path(const struct dentry *dentry, char *buffer, ssize_t buflen)
2378{
2379 return nfs_path(NFS_SB(dentry->d_sb)->mnt_path, dentry, buffer, buflen);
2380}
2381
2382static inline char *nfs4_dup_path(const struct dentry *dentry)
2383{
2384 char *page = (char *) __get_free_page(GFP_USER);
2385 char *path;
2386
2387 path = nfs4_path(dentry, page, PAGE_SIZE);
2388 if (!IS_ERR(path)) {
2389 int len = PAGE_SIZE + page - path;
2390 char *tmp = path;
2391
2392 path = kmalloc(len, GFP_KERNEL);
2393 if (path)
2394 memcpy(path, tmp, len);
2395 else
2396 path = ERR_PTR(-ENOMEM);
2397 }
2398 free_page((unsigned long)page);
2399 return path;
2400}
2401
2402static struct super_block *nfs4_clone_sb(struct nfs_server *server, struct nfs_clone_mount *data)
2403{
2404 const struct dentry *dentry = data->dentry;
2405 struct nfs4_client *clp = server->nfs4_state;
2406 struct super_block *sb;
2407
2408 server->fsid = data->fattr->fsid;
2409 nfs_copy_fh(&server->fh, data->fh);
2410 server->mnt_path = nfs4_dup_path(dentry);
2411 if (IS_ERR(server->mnt_path)) {
2412 sb = (struct super_block *)server->mnt_path;
2413 goto err;
2414 }
2415 sb = sget(&nfs4_fs_type, nfs4_compare_super, nfs_set_super, server);
2416 if (IS_ERR(sb) || sb->s_root)
2417 goto free_path;
2418 nfs4_server_capabilities(server, &server->fh);
2419
2420 down_write(&clp->cl_sem);
2421 atomic_inc(&clp->cl_count);
2422 list_add_tail(&server->nfs4_siblings, &clp->cl_superblocks);
2423 up_write(&clp->cl_sem);
2424 return sb;
2425free_path:
2426 kfree(server->mnt_path);
2427err:
2428 server->mnt_path = NULL;
2429 return sb;
2430}
2431
2432static struct super_block *nfs_clone_nfs4_sb(struct file_system_type *fs_type,
2433 int flags, const char *dev_name, void *raw_data)
2434{
2435 struct nfs_clone_mount *data = raw_data;
2436 return nfs_clone_generic_sb(data, nfs4_clone_sb, nfs_clone_server);
2437}
2438
2439static struct file_system_type clone_nfs4_fs_type = {
2440 .owner = THIS_MODULE,
2441 .name = "nfs4",
2442 .get_sb = nfs_clone_nfs4_sb,
2443 .kill_sb = nfs4_kill_super,
2444 .fs_flags = FS_ODD_RENAME|FS_REVAL_DOT|FS_BINARY_MOUNTDATA,
2445};
2446
2447static struct vfsmount *nfs_do_clone_mount(struct nfs_server *server, char *devname, struct nfs_clone_mount *mountdata)
2448{
2449 struct vfsmount *mnt = NULL;
2450 switch (server->rpc_ops->version) {
2451 case 2:
2452 case 3:
2453 mnt = vfs_kern_mount(&clone_nfs_fs_type, 0, devname, mountdata);
2454 break;
2455 case 4:
2456 mnt = vfs_kern_mount(&clone_nfs4_fs_type, 0, devname, mountdata);
2457 }
2458 return mnt;
2459}
2460
2461#define nfs4_init_once(nfsi) \
2462 do { \
2463 INIT_LIST_HEAD(&(nfsi)->open_states); \
2464 nfsi->delegation = NULL; \
2465 nfsi->delegation_state = 0; \
2466 init_rwsem(&nfsi->rwsem); \
2467 } while(0)
2468
2469static inline int register_nfs4fs(void)
2470{
2471 int ret;
2472
2473 ret = nfs_register_sysctl();
2474 if (ret != 0)
2475 return ret;
2476 ret = register_filesystem(&nfs4_fs_type);
2477 if (ret != 0)
2478 nfs_unregister_sysctl();
2479 return ret;
2480}
2481
2482static inline void unregister_nfs4fs(void)
2483{
2484 unregister_filesystem(&nfs4_fs_type);
2485 nfs_unregister_sysctl();
2486}
2487#else
2488#define nfs4_fill_sb(a,b) ERR_PTR(-EINVAL)
2489#define nfs4_fill_super(a,b) ERR_PTR(-EINVAL)
2490#define nfs4_init_once(nfsi) \
2491 do { } while (0)
2492#define register_nfs4fs() (0)
2493#define unregister_nfs4fs()
2494static struct vfsmount *nfs_do_clone_mount(struct nfs_server *server, char *devname, struct nfs_clone_mount *mountdata)
2495{
2496 return vfs_kern_mount(&clone_nfs_fs_type, 0, devname, mountdata);
2497}
2498#endif 1066#endif
2499 1067
2500static inline char *nfs_devname(const struct vfsmount *mnt_parent, 1068struct inode *nfs_alloc_inode(struct super_block *sb)
2501 const struct dentry *dentry,
2502 char *buffer, ssize_t buflen)
2503{
2504 return nfs_path(mnt_parent->mnt_devname, dentry, buffer, buflen);
2505}
2506
2507/**
2508 * nfs_do_submount - set up mountpoint when crossing a filesystem boundary
2509 * @mnt_parent - mountpoint of parent directory
2510 * @dentry - parent directory
2511 * @fh - filehandle for new root dentry
2512 * @fattr - attributes for new root inode
2513 *
2514 */
2515struct vfsmount *nfs_do_submount(const struct vfsmount *mnt_parent,
2516 const struct dentry *dentry, struct nfs_fh *fh,
2517 struct nfs_fattr *fattr)
2518{
2519 struct nfs_clone_mount mountdata = {
2520 .sb = mnt_parent->mnt_sb,
2521 .dentry = dentry,
2522 .fh = fh,
2523 .fattr = fattr,
2524 };
2525 struct vfsmount *mnt = ERR_PTR(-ENOMEM);
2526 char *page = (char *) __get_free_page(GFP_USER);
2527 char *devname;
2528
2529 dprintk("%s: submounting on %s/%s\n", __FUNCTION__,
2530 dentry->d_parent->d_name.name,
2531 dentry->d_name.name);
2532 if (page == NULL)
2533 goto out;
2534 devname = nfs_devname(mnt_parent, dentry, page, PAGE_SIZE);
2535 mnt = (struct vfsmount *)devname;
2536 if (IS_ERR(devname))
2537 goto free_page;
2538 mnt = nfs_do_clone_mount(NFS_SB(mnt_parent->mnt_sb), devname, &mountdata);
2539free_page:
2540 free_page((unsigned long)page);
2541out:
2542 dprintk("%s: done\n", __FUNCTION__);
2543 return mnt;
2544}
2545
2546#ifdef CONFIG_NFS_V4
2547/* Check if fs_root is valid */
2548static inline char *nfs4_pathname_string(struct nfs4_pathname *pathname, char *buffer, ssize_t buflen)
2549{
2550 char *end = buffer + buflen;
2551 int n;
2552
2553 *--end = '\0';
2554 buflen--;
2555
2556 n = pathname->ncomponents;
2557 while (--n >= 0) {
2558 struct nfs4_string *component = &pathname->components[n];
2559 buflen -= component->len + 1;
2560 if (buflen < 0)
2561 goto Elong;
2562 end -= component->len;
2563 memcpy(end, component->data, component->len);
2564 *--end = '/';
2565 }
2566 return end;
2567Elong:
2568 return ERR_PTR(-ENAMETOOLONG);
2569}
2570
2571/* Check if the string represents a "valid" IPv4 address */
2572static inline int valid_ipaddr4(const char *buf)
2573{
2574 int rc, count, in[4];
2575
2576 rc = sscanf(buf, "%d.%d.%d.%d", &in[0], &in[1], &in[2], &in[3]);
2577 if (rc != 4)
2578 return -EINVAL;
2579 for (count = 0; count < 4; count++) {
2580 if (in[count] > 255)
2581 return -EINVAL;
2582 }
2583 return 0;
2584}
2585
2586static struct super_block *nfs4_referral_sb(struct nfs_server *server, struct nfs_clone_mount *data)
2587{
2588 struct super_block *sb = ERR_PTR(-ENOMEM);
2589 int len;
2590
2591 len = strlen(data->mnt_path) + 1;
2592 server->mnt_path = kmalloc(len, GFP_KERNEL);
2593 if (server->mnt_path == NULL)
2594 goto err;
2595 memcpy(server->mnt_path, data->mnt_path, len);
2596 memcpy(&server->addr, data->addr, sizeof(struct sockaddr_in));
2597
2598 sb = sget(&nfs4_fs_type, nfs4_compare_super, nfs_set_super, server);
2599 if (IS_ERR(sb) || sb->s_root)
2600 goto free_path;
2601 return sb;
2602free_path:
2603 kfree(server->mnt_path);
2604err:
2605 server->mnt_path = NULL;
2606 return sb;
2607}
2608
2609static struct nfs_server *nfs4_referral_server(struct super_block *sb, struct nfs_clone_mount *data)
2610{
2611 struct nfs_server *server = NFS_SB(sb);
2612 struct rpc_timeout timeparms;
2613 int proto, timeo, retrans;
2614 void *err;
2615
2616 proto = IPPROTO_TCP;
2617 /* Since we are following a referral and there may be alternatives,
2618 set the timeouts and retries to low values */
2619 timeo = 2;
2620 retrans = 1;
2621 nfs_init_timeout_values(&timeparms, proto, timeo, retrans);
2622
2623 server->client = nfs4_create_client(server, &timeparms, proto, data->authflavor);
2624 if (IS_ERR((err = server->client)))
2625 goto out_err;
2626
2627 sb->s_time_gran = 1;
2628 sb->s_op = &nfs4_sops;
2629 err = ERR_PTR(nfs_sb_init(sb, data->authflavor));
2630 if (!IS_ERR(err))
2631 return server;
2632out_err:
2633 return (struct nfs_server *)err;
2634}
2635
2636static struct super_block *nfs_referral_nfs4_sb(struct file_system_type *fs_type,
2637 int flags, const char *dev_name, void *raw_data)
2638{
2639 struct nfs_clone_mount *data = raw_data;
2640 return nfs_clone_generic_sb(data, nfs4_referral_sb, nfs4_referral_server);
2641}
2642
2643static struct file_system_type nfs_referral_nfs4_fs_type = {
2644 .owner = THIS_MODULE,
2645 .name = "nfs4",
2646 .get_sb = nfs_referral_nfs4_sb,
2647 .kill_sb = nfs4_kill_super,
2648 .fs_flags = FS_ODD_RENAME|FS_REVAL_DOT|FS_BINARY_MOUNTDATA,
2649};
2650
2651/**
2652 * nfs_follow_referral - set up mountpoint when hitting a referral on moved error
2653 * @mnt_parent - mountpoint of parent directory
2654 * @dentry - parent directory
2655 * @fspath - fs path returned in fs_locations
2656 * @mntpath - mount path to new server
2657 * @hostname - hostname of new server
2658 * @addr - host addr of new server
2659 *
2660 */
2661struct vfsmount *nfs_follow_referral(const struct vfsmount *mnt_parent,
2662 const struct dentry *dentry, struct nfs4_fs_locations *locations)
2663{
2664 struct vfsmount *mnt = ERR_PTR(-ENOENT);
2665 struct nfs_clone_mount mountdata = {
2666 .sb = mnt_parent->mnt_sb,
2667 .dentry = dentry,
2668 .authflavor = NFS_SB(mnt_parent->mnt_sb)->client->cl_auth->au_flavor,
2669 };
2670 char *page, *page2;
2671 char *path, *fs_path;
2672 char *devname;
2673 int loc, s;
2674
2675 if (locations == NULL || locations->nlocations <= 0)
2676 goto out;
2677
2678 dprintk("%s: referral at %s/%s\n", __FUNCTION__,
2679 dentry->d_parent->d_name.name, dentry->d_name.name);
2680
2681 /* Ensure fs path is a prefix of current dentry path */
2682 page = (char *) __get_free_page(GFP_USER);
2683 if (page == NULL)
2684 goto out;
2685 page2 = (char *) __get_free_page(GFP_USER);
2686 if (page2 == NULL)
2687 goto out;
2688
2689 path = nfs4_path(dentry, page, PAGE_SIZE);
2690 if (IS_ERR(path))
2691 goto out_free;
2692
2693 fs_path = nfs4_pathname_string(&locations->fs_path, page2, PAGE_SIZE);
2694 if (IS_ERR(fs_path))
2695 goto out_free;
2696
2697 if (strncmp(path, fs_path, strlen(fs_path)) != 0) {
2698 dprintk("%s: path %s does not begin with fsroot %s\n", __FUNCTION__, path, fs_path);
2699 goto out_free;
2700 }
2701
2702 devname = nfs_devname(mnt_parent, dentry, page, PAGE_SIZE);
2703 if (IS_ERR(devname)) {
2704 mnt = (struct vfsmount *)devname;
2705 goto out_free;
2706 }
2707
2708 loc = 0;
2709 while (loc < locations->nlocations && IS_ERR(mnt)) {
2710 struct nfs4_fs_location *location = &locations->locations[loc];
2711 char *mnt_path;
2712
2713 if (location == NULL || location->nservers <= 0 ||
2714 location->rootpath.ncomponents == 0) {
2715 loc++;
2716 continue;
2717 }
2718
2719 mnt_path = nfs4_pathname_string(&location->rootpath, page2, PAGE_SIZE);
2720 if (IS_ERR(mnt_path)) {
2721 loc++;
2722 continue;
2723 }
2724 mountdata.mnt_path = mnt_path;
2725
2726 s = 0;
2727 while (s < location->nservers) {
2728 struct sockaddr_in addr = {};
2729
2730 if (location->servers[s].len <= 0 ||
2731 valid_ipaddr4(location->servers[s].data) < 0) {
2732 s++;
2733 continue;
2734 }
2735
2736 mountdata.hostname = location->servers[s].data;
2737 addr.sin_addr.s_addr = in_aton(mountdata.hostname);
2738 addr.sin_family = AF_INET;
2739 addr.sin_port = htons(NFS_PORT);
2740 mountdata.addr = &addr;
2741
2742 mnt = vfs_kern_mount(&nfs_referral_nfs4_fs_type, 0, devname, &mountdata);
2743 if (!IS_ERR(mnt)) {
2744 break;
2745 }
2746 s++;
2747 }
2748 loc++;
2749 }
2750
2751out_free:
2752 free_page((unsigned long)page);
2753 free_page((unsigned long)page2);
2754out:
2755 dprintk("%s: done\n", __FUNCTION__);
2756 return mnt;
2757}
2758
2759/*
2760 * nfs_do_refmount - handle crossing a referral on server
2761 * @dentry - dentry of referral
2762 * @nd - nameidata info
2763 *
2764 */
2765struct vfsmount *nfs_do_refmount(const struct vfsmount *mnt_parent, struct dentry *dentry)
2766{
2767 struct vfsmount *mnt = ERR_PTR(-ENOENT);
2768 struct dentry *parent;
2769 struct nfs4_fs_locations *fs_locations = NULL;
2770 struct page *page;
2771 int err;
2772
2773 /* BUG_ON(IS_ROOT(dentry)); */
2774 dprintk("%s: enter\n", __FUNCTION__);
2775
2776 page = alloc_page(GFP_KERNEL);
2777 if (page == NULL)
2778 goto out;
2779
2780 fs_locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2781 if (fs_locations == NULL)
2782 goto out_free;
2783
2784 /* Get locations */
2785 parent = dget_parent(dentry);
2786 dprintk("%s: getting locations for %s/%s\n", __FUNCTION__, parent->d_name.name, dentry->d_name.name);
2787 err = nfs4_proc_fs_locations(parent->d_inode, dentry, fs_locations, page);
2788 dput(parent);
2789 if (err != 0 || fs_locations->nlocations <= 0 ||
2790 fs_locations->fs_path.ncomponents <= 0)
2791 goto out_free;
2792
2793 mnt = nfs_follow_referral(mnt_parent, dentry, fs_locations);
2794out_free:
2795 __free_page(page);
2796 kfree(fs_locations);
2797out:
2798 dprintk("%s: done\n", __FUNCTION__);
2799 return mnt;
2800}
2801#else
2802struct vfsmount *nfs_do_refmount(const struct vfsmount *mnt_parent, struct dentry *dentry)
2803{
2804 return ERR_PTR(-ENOENT);
2805}
2806#endif
2807
2808extern int nfs_init_nfspagecache(void);
2809extern void nfs_destroy_nfspagecache(void);
2810extern int nfs_init_readpagecache(void);
2811extern void nfs_destroy_readpagecache(void);
2812extern int nfs_init_writepagecache(void);
2813extern void nfs_destroy_writepagecache(void);
2814#ifdef CONFIG_NFS_DIRECTIO
2815extern int nfs_init_directcache(void);
2816extern void nfs_destroy_directcache(void);
2817#endif
2818
2819static kmem_cache_t * nfs_inode_cachep;
2820
2821static struct inode *nfs_alloc_inode(struct super_block *sb)
2822{ 1069{
2823 struct nfs_inode *nfsi; 1070 struct nfs_inode *nfsi;
2824 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);
@@ -2837,11 +1084,19 @@ static struct inode *nfs_alloc_inode(struct super_block *sb)
2837 return &nfsi->vfs_inode; 1084 return &nfsi->vfs_inode;
2838} 1085}
2839 1086
2840static void nfs_destroy_inode(struct inode *inode) 1087void nfs_destroy_inode(struct inode *inode)
2841{ 1088{
2842 kmem_cache_free(nfs_inode_cachep, NFS_I(inode)); 1089 kmem_cache_free(nfs_inode_cachep, NFS_I(inode));
2843} 1090}
2844 1091
1092#define nfs4_init_once(nfsi) \
1093 do { \
1094 INIT_LIST_HEAD(&(nfsi)->open_states); \
1095 nfsi->delegation = NULL; \
1096 nfsi->delegation_state = 0; \
1097 init_rwsem(&nfsi->rwsem); \
1098 } while(0)
1099
2845static void init_once(void * foo, kmem_cache_t * cachep, unsigned long flags) 1100static void init_once(void * foo, kmem_cache_t * cachep, unsigned long flags)
2846{ 1101{
2847 struct nfs_inode *nfsi = (struct nfs_inode *) foo; 1102 struct nfs_inode *nfsi = (struct nfs_inode *) foo;
@@ -2862,7 +1117,7 @@ static void init_once(void * foo, kmem_cache_t * cachep, unsigned long flags)
2862 } 1117 }
2863} 1118}
2864 1119
2865static int nfs_init_inodecache(void) 1120static int __init nfs_init_inodecache(void)
2866{ 1121{
2867 nfs_inode_cachep = kmem_cache_create("nfs_inode_cache", 1122 nfs_inode_cachep = kmem_cache_create("nfs_inode_cache",
2868 sizeof(struct nfs_inode), 1123 sizeof(struct nfs_inode),
@@ -2875,7 +1130,7 @@ static int nfs_init_inodecache(void)
2875 return 0; 1130 return 0;
2876} 1131}
2877 1132
2878static void nfs_destroy_inodecache(void) 1133static void __exit nfs_destroy_inodecache(void)
2879{ 1134{
2880 if (kmem_cache_destroy(nfs_inode_cachep)) 1135 if (kmem_cache_destroy(nfs_inode_cachep))
2881 printk(KERN_INFO "nfs_inode_cache: not all structures were freed\n"); 1136 printk(KERN_INFO "nfs_inode_cache: not all structures were freed\n");
@@ -2904,29 +1159,22 @@ static int __init init_nfs_fs(void)
2904 if (err) 1159 if (err)
2905 goto out1; 1160 goto out1;
2906 1161
2907#ifdef CONFIG_NFS_DIRECTIO
2908 err = nfs_init_directcache(); 1162 err = nfs_init_directcache();
2909 if (err) 1163 if (err)
2910 goto out0; 1164 goto out0;
2911#endif
2912 1165
2913#ifdef CONFIG_PROC_FS 1166#ifdef CONFIG_PROC_FS
2914 rpc_proc_register(&nfs_rpcstat); 1167 rpc_proc_register(&nfs_rpcstat);
2915#endif 1168#endif
2916 err = register_filesystem(&nfs_fs_type); 1169 if ((err = register_nfs_fs()) != 0)
2917 if (err)
2918 goto out;
2919 if ((err = register_nfs4fs()) != 0)
2920 goto out; 1170 goto out;
2921 return 0; 1171 return 0;
2922out: 1172out:
2923#ifdef CONFIG_PROC_FS 1173#ifdef CONFIG_PROC_FS
2924 rpc_proc_unregister("nfs"); 1174 rpc_proc_unregister("nfs");
2925#endif 1175#endif
2926#ifdef CONFIG_NFS_DIRECTIO
2927 nfs_destroy_directcache(); 1176 nfs_destroy_directcache();
2928out0: 1177out0:
2929#endif
2930 nfs_destroy_writepagecache(); 1178 nfs_destroy_writepagecache();
2931out1: 1179out1:
2932 nfs_destroy_readpagecache(); 1180 nfs_destroy_readpagecache();
@@ -2940,9 +1188,7 @@ out4:
2940 1188
2941static void __exit exit_nfs_fs(void) 1189static void __exit exit_nfs_fs(void)
2942{ 1190{
2943#ifdef CONFIG_NFS_DIRECTIO
2944 nfs_destroy_directcache(); 1191 nfs_destroy_directcache();
2945#endif
2946 nfs_destroy_writepagecache(); 1192 nfs_destroy_writepagecache();
2947 nfs_destroy_readpagecache(); 1193 nfs_destroy_readpagecache();
2948 nfs_destroy_inodecache(); 1194 nfs_destroy_inodecache();
@@ -2950,8 +1196,7 @@ static void __exit exit_nfs_fs(void)
2950#ifdef CONFIG_PROC_FS 1196#ifdef CONFIG_PROC_FS
2951 rpc_proc_unregister("nfs"); 1197 rpc_proc_unregister("nfs");
2952#endif 1198#endif
2953 unregister_filesystem(&nfs_fs_type); 1199 unregister_nfs_fs();
2954 unregister_nfs4fs();
2955} 1200}
2956 1201
2957/* Not quite true; I just maintain it */ 1202/* 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..5e51c4535b6f
--- /dev/null
+++ b/fs/nfs/internal.h
@@ -0,0 +1,179 @@
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 */
61extern struct rpc_procinfo nfs4_procedures[];
62
63extern int nfs4_proc_fs_locations(struct inode *dir, struct dentry *dentry,
64 struct nfs4_fs_locations *fs_locations,
65 struct page *page);
66
67/* inode.c */
68extern struct inode *nfs_alloc_inode(struct super_block *sb);
69extern void nfs_destroy_inode(struct inode *);
70extern int nfs_write_inode(struct inode *,int);
71extern void nfs_clear_inode(struct inode *);
72#ifdef CONFIG_NFS_V4
73extern void nfs4_clear_inode(struct inode *);
74#endif
75
76/* super.c */
77extern struct file_system_type nfs_referral_nfs4_fs_type;
78extern struct file_system_type clone_nfs_fs_type;
79#ifdef CONFIG_NFS_V4
80extern struct file_system_type clone_nfs4_fs_type;
81#endif
82#ifdef CONFIG_PROC_FS
83extern struct rpc_stat nfs_rpcstat;
84#endif
85extern int __init register_nfs_fs(void);
86extern void __exit unregister_nfs_fs(void);
87
88/* namespace.c */
89extern char *nfs_path(const char *base, const struct dentry *dentry,
90 char *buffer, ssize_t buflen);
91
92/*
93 * Determine the mount path as a string
94 */
95static inline char *nfs4_path(const struct dentry *dentry, char *buffer, ssize_t buflen)
96{
97 return nfs_path(NFS_SB(dentry->d_sb)->mnt_path, dentry, buffer, buflen);
98}
99
100/*
101 * Determine the device name as a string
102 */
103static inline char *nfs_devname(const struct vfsmount *mnt_parent,
104 const struct dentry *dentry,
105 char *buffer, ssize_t buflen)
106{
107 return nfs_path(mnt_parent->mnt_devname, dentry, buffer, buflen);
108}
109
110/*
111 * Determine the actual block size (and log2 thereof)
112 */
113static inline
114unsigned long nfs_block_bits(unsigned long bsize, unsigned char *nrbitsp)
115{
116 /* make sure blocksize is a power of two */
117 if ((bsize & (bsize - 1)) || nrbitsp) {
118 unsigned char nrbits;
119
120 for (nrbits = 31; nrbits && !(bsize & (1 << nrbits)); nrbits--)
121 ;
122 bsize = 1 << nrbits;
123 if (nrbitsp)
124 *nrbitsp = nrbits;
125 }
126
127 return bsize;
128}
129
130/*
131 * Calculate the number of 512byte blocks used.
132 */
133static inline unsigned long nfs_calc_block_size(u64 tsize)
134{
135 loff_t used = (tsize + 511) >> 9;
136 return (used > ULONG_MAX) ? ULONG_MAX : used;
137}
138
139/*
140 * Compute and set NFS server blocksize
141 */
142static inline
143unsigned long nfs_block_size(unsigned long bsize, unsigned char *nrbitsp)
144{
145 if (bsize < NFS_MIN_FILE_IO_SIZE)
146 bsize = NFS_DEF_FILE_IO_SIZE;
147 else if (bsize >= NFS_MAX_FILE_IO_SIZE)
148 bsize = NFS_MAX_FILE_IO_SIZE;
149
150 return nfs_block_bits(bsize, nrbitsp);
151}
152
153/*
154 * Determine the maximum file size for a superblock
155 */
156static inline
157void nfs_super_set_maxbytes(struct super_block *sb, __u64 maxfilesize)
158{
159 sb->s_maxbytes = (loff_t)maxfilesize;
160 if (sb->s_maxbytes > MAX_LFS_FILESIZE || sb->s_maxbytes <= 0)
161 sb->s_maxbytes = MAX_LFS_FILESIZE;
162}
163
164/*
165 * Check if the string represents a "valid" IPv4 address
166 */
167static inline int valid_ipaddr4(const char *buf)
168{
169 int rc, count, in[4];
170
171 rc = sscanf(buf, "%d.%d.%d.%d", &in[0], &in[1], &in[2], &in[3]);
172 if (rc != 4)
173 return -EINVAL;
174 for (count = 0; count < 4; count++) {
175 if (in[count] > 255)
176 return -EINVAL;
177 }
178 return 0;
179}
diff --git a/fs/nfs/namespace.c b/fs/nfs/namespace.c
index 8ca44b7b25c3..19b98ca468eb 100644
--- a/fs/nfs/namespace.c
+++ b/fs/nfs/namespace.c
@@ -15,15 +15,64 @@
15#include <linux/string.h> 15#include <linux/string.h>
16#include <linux/sunrpc/clnt.h> 16#include <linux/sunrpc/clnt.h>
17#include <linux/vfs.h> 17#include <linux/vfs.h>
18#include "internal.h"
18 19
19#define NFSDBG_FACILITY NFSDBG_VFS 20#define NFSDBG_FACILITY NFSDBG_VFS
20 21
21LIST_HEAD(nfs_automount_list);
22static void nfs_expire_automounts(void *list); 22static void nfs_expire_automounts(void *list);
23
24LIST_HEAD(nfs_automount_list);
23static DECLARE_WORK(nfs_automount_task, nfs_expire_automounts, &nfs_automount_list); 25static DECLARE_WORK(nfs_automount_task, nfs_expire_automounts, &nfs_automount_list);
24int nfs_mountpoint_expiry_timeout = 500 * HZ; 26int nfs_mountpoint_expiry_timeout = 500 * HZ;
25 27
26/* 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/*
27 * nfs_follow_mountpoint - handle crossing a mountpoint on the server 76 * nfs_follow_mountpoint - handle crossing a mountpoint on the server
28 * @dentry - dentry of mountpoint 77 * @dentry - dentry of mountpoint
29 * @nd - nameidata info 78 * @nd - nameidata info
@@ -117,3 +166,64 @@ void nfs_release_automount_timer(void)
117 flush_scheduled_work(); 166 flush_scheduled_work();
118 } 167 }
119} 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 a7ed88f97a11..4a006f81666b 100644
--- a/fs/nfs/nfs2xdr.c
+++ b/fs/nfs/nfs2xdr.c
@@ -27,8 +27,6 @@
27#define NFSDBG_FACILITY NFSDBG_XDR 27#define NFSDBG_FACILITY NFSDBG_XDR
28/* #define NFS_PARANOIA 1 */ 28/* #define NFS_PARANOIA 1 */
29 29
30extern int nfs_stat_to_errno(int stat);
31
32/* Mapping from NFS error code to "errno" error code. */ 30/* Mapping from NFS error code to "errno" error code. */
33#define errno_NFSERR_IO EIO 31#define errno_NFSERR_IO EIO
34 32
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 f70eee2cac05..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
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 3300e35d74ad..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)
diff --git a/fs/nfs/pagelist.c b/fs/nfs/pagelist.c
index 656481c0daa3..ef9429643ebc 100644
--- a/fs/nfs/pagelist.c
+++ b/fs/nfs/pagelist.c
@@ -378,7 +378,7 @@ out:
378 return res; 378 return res;
379} 379}
380 380
381int nfs_init_nfspagecache(void) 381int __init nfs_init_nfspagecache(void)
382{ 382{
383 nfs_page_cachep = kmem_cache_create("nfs_page", 383 nfs_page_cachep = kmem_cache_create("nfs_page",
384 sizeof(struct nfs_page), 384 sizeof(struct nfs_page),
@@ -390,7 +390,7 @@ int nfs_init_nfspagecache(void)
390 return 0; 390 return 0;
391} 391}
392 392
393void nfs_destroy_nfspagecache(void) 393void __exit nfs_destroy_nfspagecache(void)
394{ 394{
395 if (kmem_cache_destroy(nfs_page_cachep)) 395 if (kmem_cache_destroy(nfs_page_cachep))
396 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 fd9018c692bb..41c2ffee24f5 100644
--- a/fs/nfs/read.c
+++ b/fs/nfs/read.c
@@ -694,7 +694,7 @@ int nfs_readpages(struct file *filp, struct address_space *mapping,
694 return ret; 694 return ret;
695} 695}
696 696
697int nfs_init_readpagecache(void) 697int __init nfs_init_readpagecache(void)
698{ 698{
699 nfs_rdata_cachep = kmem_cache_create("nfs_read_data", 699 nfs_rdata_cachep = kmem_cache_create("nfs_read_data",
700 sizeof(struct nfs_read_data), 700 sizeof(struct nfs_read_data),
@@ -711,7 +711,7 @@ int nfs_init_readpagecache(void)
711 return 0; 711 return 0;
712} 712}
713 713
714void nfs_destroy_readpagecache(void) 714void __exit nfs_destroy_readpagecache(void)
715{ 715{
716 mempool_destroy(nfs_rdata_mempool); 716 mempool_destroy(nfs_rdata_mempool);
717 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..4acd3ee96427
--- /dev/null
+++ b/fs/nfs/super.c
@@ -0,0 +1,1468 @@
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 super_block *, struct kstatfs *);
111static int nfs_show_options(struct seq_file *, struct vfsmount *);
112static int nfs_show_stats(struct seq_file *, struct vfsmount *);
113static struct super_block *nfs_get_sb(struct file_system_type *, int, const char *, void *);
114static struct super_block *nfs_clone_nfs_sb(struct file_system_type *fs_type,
115 int flags, const char *dev_name, void *raw_data);
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 struct super_block *nfs4_get_sb(struct file_system_type *fs_type,
147 int flags, const char *dev_name, void *raw_data);
148static struct super_block *nfs_clone_nfs4_sb(struct file_system_type *fs_type,
149 int flags, const char *dev_name, void *raw_data);
150static struct super_block *nfs_referral_nfs4_sb(struct file_system_type *fs_type,
151 int flags, const char *dev_name, void *raw_data);
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
190static const int nfs_set_port_min = 0;
191static const int nfs_set_port_max = 65535;
192
193static int param_set_port(const char *val, struct kernel_param *kp)
194{
195 char *endp;
196 int num = simple_strtol(val, &endp, 0);
197 if (endp == val || *endp || num < nfs_set_port_min || num > nfs_set_port_max)
198 return -EINVAL;
199 *((int *)kp->arg) = num;
200 return 0;
201}
202
203module_param_call(callback_tcpport, param_set_port, param_get_int,
204 &nfs_callback_set_tcpport, 0644);
205
206static int param_set_idmap_timeout(const char *val, struct kernel_param *kp)
207{
208 char *endp;
209 int num = simple_strtol(val, &endp, 0);
210 int jif = num * HZ;
211 if (endp == val || *endp || num < 0 || jif < num)
212 return -EINVAL;
213 *((int *)kp->arg) = jif;
214 return 0;
215}
216
217module_param_call(idmap_cache_timeout, param_set_idmap_timeout, param_get_int,
218 &nfs_idmap_cache_timeout, 0644);
219
220/*
221 * Register the NFS filesystems
222 */
223int __init register_nfs_fs(void)
224{
225 int ret;
226
227 ret = register_filesystem(&nfs_fs_type);
228 if (ret < 0)
229 goto error_0;
230
231#ifdef CONFIG_NFS_V4
232 ret = nfs_register_sysctl();
233 if (ret < 0)
234 goto error_1;
235 ret = register_filesystem(&nfs4_fs_type);
236 if (ret < 0)
237 goto error_2;
238#endif
239 return 0;
240
241#ifdef CONFIG_NFS_V4
242error_2:
243 nfs_unregister_sysctl();
244error_1:
245 unregister_filesystem(&nfs_fs_type);
246#endif
247error_0:
248 return ret;
249}
250
251/*
252 * Unregister the NFS filesystems
253 */
254void __exit unregister_nfs_fs(void)
255{
256#ifdef CONFIG_NFS_V4
257 unregister_filesystem(&nfs4_fs_type);
258 nfs_unregister_sysctl();
259#endif
260 unregister_filesystem(&nfs_fs_type);
261}
262
263/*
264 * Deliver file system statistics to userspace
265 */
266static int nfs_statfs(struct super_block *sb, struct kstatfs *buf)
267{
268 struct nfs_server *server = NFS_SB(sb);
269 unsigned char blockbits;
270 unsigned long blockres;
271 struct nfs_fh *rootfh = NFS_FH(sb->s_root->d_inode);
272 struct nfs_fattr fattr;
273 struct nfs_fsstat res = {
274 .fattr = &fattr,
275 };
276 int error;
277
278 lock_kernel();
279
280 error = server->rpc_ops->statfs(server, rootfh, &res);
281 buf->f_type = NFS_SUPER_MAGIC;
282 if (error < 0)
283 goto out_err;
284
285 /*
286 * Current versions of glibc do not correctly handle the
287 * case where f_frsize != f_bsize. Eventually we want to
288 * report the value of wtmult in this field.
289 */
290 buf->f_frsize = sb->s_blocksize;
291
292 /*
293 * On most *nix systems, f_blocks, f_bfree, and f_bavail
294 * are reported in units of f_frsize. Linux hasn't had
295 * an f_frsize field in its statfs struct until recently,
296 * thus historically Linux's sys_statfs reports these
297 * fields in units of f_bsize.
298 */
299 buf->f_bsize = sb->s_blocksize;
300 blockbits = sb->s_blocksize_bits;
301 blockres = (1 << blockbits) - 1;
302 buf->f_blocks = (res.tbytes + blockres) >> blockbits;
303 buf->f_bfree = (res.fbytes + blockres) >> blockbits;
304 buf->f_bavail = (res.abytes + blockres) >> blockbits;
305
306 buf->f_files = res.tfiles;
307 buf->f_ffree = res.afiles;
308
309 buf->f_namelen = server->namelen;
310 out:
311 unlock_kernel();
312 return 0;
313
314 out_err:
315 dprintk("%s: statfs error = %d\n", __FUNCTION__, -error);
316 buf->f_bsize = buf->f_blocks = buf->f_bfree = buf->f_bavail = -1;
317 goto out;
318
319}
320
321/*
322 * Describe the mount options in force on this server representation
323 */
324static void nfs_show_mount_options(struct seq_file *m, struct nfs_server *nfss, int showdefaults)
325{
326 static struct proc_nfs_info {
327 int flag;
328 char *str;
329 char *nostr;
330 } nfs_info[] = {
331 { NFS_MOUNT_SOFT, ",soft", ",hard" },
332 { NFS_MOUNT_INTR, ",intr", "" },
333 { NFS_MOUNT_NOCTO, ",nocto", "" },
334 { NFS_MOUNT_NOAC, ",noac", "" },
335 { NFS_MOUNT_NONLM, ",nolock", "" },
336 { NFS_MOUNT_NOACL, ",noacl", "" },
337 { 0, NULL, NULL }
338 };
339 struct proc_nfs_info *nfs_infop;
340 char buf[12];
341 char *proto;
342
343 seq_printf(m, ",vers=%d", nfss->rpc_ops->version);
344 seq_printf(m, ",rsize=%d", nfss->rsize);
345 seq_printf(m, ",wsize=%d", nfss->wsize);
346 if (nfss->acregmin != 3*HZ || showdefaults)
347 seq_printf(m, ",acregmin=%d", nfss->acregmin/HZ);
348 if (nfss->acregmax != 60*HZ || showdefaults)
349 seq_printf(m, ",acregmax=%d", nfss->acregmax/HZ);
350 if (nfss->acdirmin != 30*HZ || showdefaults)
351 seq_printf(m, ",acdirmin=%d", nfss->acdirmin/HZ);
352 if (nfss->acdirmax != 60*HZ || showdefaults)
353 seq_printf(m, ",acdirmax=%d", nfss->acdirmax/HZ);
354 for (nfs_infop = nfs_info; nfs_infop->flag; nfs_infop++) {
355 if (nfss->flags & nfs_infop->flag)
356 seq_puts(m, nfs_infop->str);
357 else
358 seq_puts(m, nfs_infop->nostr);
359 }
360 switch (nfss->client->cl_xprt->prot) {
361 case IPPROTO_TCP:
362 proto = "tcp";
363 break;
364 case IPPROTO_UDP:
365 proto = "udp";
366 break;
367 default:
368 snprintf(buf, sizeof(buf), "%u", nfss->client->cl_xprt->prot);
369 proto = buf;
370 }
371 seq_printf(m, ",proto=%s", proto);
372 seq_printf(m, ",timeo=%lu", 10U * nfss->retrans_timeo / HZ);
373 seq_printf(m, ",retrans=%u", nfss->retrans_count);
374}
375
376/*
377 * Describe the mount options on this VFS mountpoint
378 */
379static int nfs_show_options(struct seq_file *m, struct vfsmount *mnt)
380{
381 struct nfs_server *nfss = NFS_SB(mnt->mnt_sb);
382
383 nfs_show_mount_options(m, nfss, 0);
384
385 seq_puts(m, ",addr=");
386 seq_escape(m, nfss->hostname, " \t\n\\");
387
388 return 0;
389}
390
391/*
392 * Present statistical information for this VFS mountpoint
393 */
394static int nfs_show_stats(struct seq_file *m, struct vfsmount *mnt)
395{
396 int i, cpu;
397 struct nfs_server *nfss = NFS_SB(mnt->mnt_sb);
398 struct rpc_auth *auth = nfss->client->cl_auth;
399 struct nfs_iostats totals = { };
400
401 seq_printf(m, "statvers=%s", NFS_IOSTAT_VERS);
402
403 /*
404 * Display all mount option settings
405 */
406 seq_printf(m, "\n\topts:\t");
407 seq_puts(m, mnt->mnt_sb->s_flags & MS_RDONLY ? "ro" : "rw");
408 seq_puts(m, mnt->mnt_sb->s_flags & MS_SYNCHRONOUS ? ",sync" : "");
409 seq_puts(m, mnt->mnt_sb->s_flags & MS_NOATIME ? ",noatime" : "");
410 seq_puts(m, mnt->mnt_sb->s_flags & MS_NODIRATIME ? ",nodiratime" : "");
411 nfs_show_mount_options(m, nfss, 1);
412
413 seq_printf(m, "\n\tage:\t%lu", (jiffies - nfss->mount_time) / HZ);
414
415 seq_printf(m, "\n\tcaps:\t");
416 seq_printf(m, "caps=0x%x", nfss->caps);
417 seq_printf(m, ",wtmult=%d", nfss->wtmult);
418 seq_printf(m, ",dtsize=%d", nfss->dtsize);
419 seq_printf(m, ",bsize=%d", nfss->bsize);
420 seq_printf(m, ",namelen=%d", nfss->namelen);
421
422#ifdef CONFIG_NFS_V4
423 if (nfss->rpc_ops->version == 4) {
424 seq_printf(m, "\n\tnfsv4:\t");
425 seq_printf(m, "bm0=0x%x", nfss->attr_bitmask[0]);
426 seq_printf(m, ",bm1=0x%x", nfss->attr_bitmask[1]);
427 seq_printf(m, ",acl=0x%x", nfss->acl_bitmask);
428 }
429#endif
430
431 /*
432 * Display security flavor in effect for this mount
433 */
434 seq_printf(m, "\n\tsec:\tflavor=%d", auth->au_ops->au_flavor);
435 if (auth->au_flavor)
436 seq_printf(m, ",pseudoflavor=%d", auth->au_flavor);
437
438 /*
439 * Display superblock I/O counters
440 */
441 for_each_possible_cpu(cpu) {
442 struct nfs_iostats *stats;
443
444 preempt_disable();
445 stats = per_cpu_ptr(nfss->io_stats, cpu);
446
447 for (i = 0; i < __NFSIOS_COUNTSMAX; i++)
448 totals.events[i] += stats->events[i];
449 for (i = 0; i < __NFSIOS_BYTESMAX; i++)
450 totals.bytes[i] += stats->bytes[i];
451
452 preempt_enable();
453 }
454
455 seq_printf(m, "\n\tevents:\t");
456 for (i = 0; i < __NFSIOS_COUNTSMAX; i++)
457 seq_printf(m, "%lu ", totals.events[i]);
458 seq_printf(m, "\n\tbytes:\t");
459 for (i = 0; i < __NFSIOS_BYTESMAX; i++)
460 seq_printf(m, "%Lu ", totals.bytes[i]);
461 seq_printf(m, "\n");
462
463 rpc_print_iostats(m, nfss->client);
464
465 return 0;
466}
467
468/*
469 * Begin unmount by attempting to remove all automounted mountpoints we added
470 * in response to traversals
471 */
472static void nfs_umount_begin(struct vfsmount *vfsmnt, int flags)
473{
474 struct nfs_server *server;
475 struct rpc_clnt *rpc;
476
477 shrink_submounts(vfsmnt, &nfs_automount_list);
478 if (!(flags & MNT_FORCE))
479 return;
480 /* -EIO all pending I/O */
481 server = NFS_SB(vfsmnt->mnt_sb);
482 rpc = server->client;
483 if (!IS_ERR(rpc))
484 rpc_killall_tasks(rpc);
485 rpc = server->client_acl;
486 if (!IS_ERR(rpc))
487 rpc_killall_tasks(rpc);
488}
489
490/*
491 * Obtain the root inode of the file system.
492 */
493static struct inode *
494nfs_get_root(struct super_block *sb, struct nfs_fh *rootfh, struct nfs_fsinfo *fsinfo)
495{
496 struct nfs_server *server = NFS_SB(sb);
497 int error;
498
499 error = server->rpc_ops->getroot(server, rootfh, fsinfo);
500 if (error < 0) {
501 dprintk("nfs_get_root: getattr error = %d\n", -error);
502 return ERR_PTR(error);
503 }
504
505 server->fsid = fsinfo->fattr->fsid;
506 return nfs_fhget(sb, rootfh, fsinfo->fattr);
507}
508
509/*
510 * Do NFS version-independent mount processing, and sanity checking
511 */
512static int
513nfs_sb_init(struct super_block *sb, rpc_authflavor_t authflavor)
514{
515 struct nfs_server *server;
516 struct inode *root_inode;
517 struct nfs_fattr fattr;
518 struct nfs_fsinfo fsinfo = {
519 .fattr = &fattr,
520 };
521 struct nfs_pathconf pathinfo = {
522 .fattr = &fattr,
523 };
524 int no_root_error = 0;
525 unsigned long max_rpc_payload;
526
527 /* We probably want something more informative here */
528 snprintf(sb->s_id, sizeof(sb->s_id), "%x:%x", MAJOR(sb->s_dev), MINOR(sb->s_dev));
529
530 server = NFS_SB(sb);
531
532 sb->s_magic = NFS_SUPER_MAGIC;
533
534 server->io_stats = nfs_alloc_iostats();
535 if (server->io_stats == NULL)
536 return -ENOMEM;
537
538 root_inode = nfs_get_root(sb, &server->fh, &fsinfo);
539 /* Did getting the root inode fail? */
540 if (IS_ERR(root_inode)) {
541 no_root_error = PTR_ERR(root_inode);
542 goto out_no_root;
543 }
544 sb->s_root = d_alloc_root(root_inode);
545 if (!sb->s_root) {
546 no_root_error = -ENOMEM;
547 goto out_no_root;
548 }
549 sb->s_root->d_op = server->rpc_ops->dentry_ops;
550
551 /* mount time stamp, in seconds */
552 server->mount_time = jiffies;
553
554 /* Get some general file system info */
555 if (server->namelen == 0 &&
556 server->rpc_ops->pathconf(server, &server->fh, &pathinfo) >= 0)
557 server->namelen = pathinfo.max_namelen;
558 /* Work out a lot of parameters */
559 if (server->rsize == 0)
560 server->rsize = nfs_block_size(fsinfo.rtpref, NULL);
561 if (server->wsize == 0)
562 server->wsize = nfs_block_size(fsinfo.wtpref, NULL);
563
564 if (fsinfo.rtmax >= 512 && server->rsize > fsinfo.rtmax)
565 server->rsize = nfs_block_size(fsinfo.rtmax, NULL);
566 if (fsinfo.wtmax >= 512 && server->wsize > fsinfo.wtmax)
567 server->wsize = nfs_block_size(fsinfo.wtmax, NULL);
568
569 max_rpc_payload = nfs_block_size(rpc_max_payload(server->client), NULL);
570 if (server->rsize > max_rpc_payload)
571 server->rsize = max_rpc_payload;
572 if (server->rsize > NFS_MAX_FILE_IO_SIZE)
573 server->rsize = NFS_MAX_FILE_IO_SIZE;
574 server->rpages = (server->rsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
575
576 if (server->wsize > max_rpc_payload)
577 server->wsize = max_rpc_payload;
578 if (server->wsize > NFS_MAX_FILE_IO_SIZE)
579 server->wsize = NFS_MAX_FILE_IO_SIZE;
580 server->wpages = (server->wsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
581
582 if (sb->s_blocksize == 0)
583 sb->s_blocksize = nfs_block_bits(server->wsize,
584 &sb->s_blocksize_bits);
585 server->wtmult = nfs_block_bits(fsinfo.wtmult, NULL);
586
587 server->dtsize = nfs_block_size(fsinfo.dtpref, NULL);
588 if (server->dtsize > PAGE_CACHE_SIZE)
589 server->dtsize = PAGE_CACHE_SIZE;
590 if (server->dtsize > server->rsize)
591 server->dtsize = server->rsize;
592
593 if (server->flags & NFS_MOUNT_NOAC) {
594 server->acregmin = server->acregmax = 0;
595 server->acdirmin = server->acdirmax = 0;
596 sb->s_flags |= MS_SYNCHRONOUS;
597 }
598 server->backing_dev_info.ra_pages = server->rpages * NFS_MAX_READAHEAD;
599
600 nfs_super_set_maxbytes(sb, fsinfo.maxfilesize);
601
602 server->client->cl_intr = (server->flags & NFS_MOUNT_INTR) ? 1 : 0;
603 server->client->cl_softrtry = (server->flags & NFS_MOUNT_SOFT) ? 1 : 0;
604
605 /* We're airborne Set socket buffersize */
606 rpc_setbufsize(server->client, server->wsize + 100, server->rsize + 100);
607 return 0;
608 /* Yargs. It didn't work out. */
609out_no_root:
610 dprintk("nfs_sb_init: get root inode failed: errno %d\n", -no_root_error);
611 if (!IS_ERR(root_inode))
612 iput(root_inode);
613 return no_root_error;
614}
615
616/*
617 * Initialise the timeout values for a connection
618 */
619static void nfs_init_timeout_values(struct rpc_timeout *to, int proto, unsigned int timeo, unsigned int retrans)
620{
621 to->to_initval = timeo * HZ / 10;
622 to->to_retries = retrans;
623 if (!to->to_retries)
624 to->to_retries = 2;
625
626 switch (proto) {
627 case IPPROTO_TCP:
628 if (!to->to_initval)
629 to->to_initval = 60 * HZ;
630 if (to->to_initval > NFS_MAX_TCP_TIMEOUT)
631 to->to_initval = NFS_MAX_TCP_TIMEOUT;
632 to->to_increment = to->to_initval;
633 to->to_maxval = to->to_initval + (to->to_increment * to->to_retries);
634 to->to_exponential = 0;
635 break;
636 case IPPROTO_UDP:
637 default:
638 if (!to->to_initval)
639 to->to_initval = 11 * HZ / 10;
640 if (to->to_initval > NFS_MAX_UDP_TIMEOUT)
641 to->to_initval = NFS_MAX_UDP_TIMEOUT;
642 to->to_maxval = NFS_MAX_UDP_TIMEOUT;
643 to->to_exponential = 1;
644 break;
645 }
646}
647
648/*
649 * Create an RPC client handle.
650 */
651static struct rpc_clnt *
652nfs_create_client(struct nfs_server *server, const struct nfs_mount_data *data)
653{
654 struct rpc_timeout timeparms;
655 struct rpc_xprt *xprt = NULL;
656 struct rpc_clnt *clnt = NULL;
657 int proto = (data->flags & NFS_MOUNT_TCP) ? IPPROTO_TCP : IPPROTO_UDP;
658
659 nfs_init_timeout_values(&timeparms, proto, data->timeo, data->retrans);
660
661 server->retrans_timeo = timeparms.to_initval;
662 server->retrans_count = timeparms.to_retries;
663
664 /* create transport and client */
665 xprt = xprt_create_proto(proto, &server->addr, &timeparms);
666 if (IS_ERR(xprt)) {
667 dprintk("%s: cannot create RPC transport. Error = %ld\n",
668 __FUNCTION__, PTR_ERR(xprt));
669 return (struct rpc_clnt *)xprt;
670 }
671 clnt = rpc_create_client(xprt, server->hostname, &nfs_program,
672 server->rpc_ops->version, data->pseudoflavor);
673 if (IS_ERR(clnt)) {
674 dprintk("%s: cannot create RPC client. Error = %ld\n",
675 __FUNCTION__, PTR_ERR(xprt));
676 goto out_fail;
677 }
678
679 clnt->cl_intr = 1;
680 clnt->cl_softrtry = 1;
681
682 return clnt;
683
684out_fail:
685 return clnt;
686}
687
688/*
689 * Clone a server record
690 */
691static struct nfs_server *nfs_clone_server(struct super_block *sb, struct nfs_clone_mount *data)
692{
693 struct nfs_server *server = NFS_SB(sb);
694 struct nfs_server *parent = NFS_SB(data->sb);
695 struct inode *root_inode;
696 struct nfs_fsinfo fsinfo;
697 void *err = ERR_PTR(-ENOMEM);
698
699 sb->s_op = data->sb->s_op;
700 sb->s_blocksize = data->sb->s_blocksize;
701 sb->s_blocksize_bits = data->sb->s_blocksize_bits;
702 sb->s_maxbytes = data->sb->s_maxbytes;
703
704 server->client_sys = server->client_acl = ERR_PTR(-EINVAL);
705 server->io_stats = nfs_alloc_iostats();
706 if (server->io_stats == NULL)
707 goto out;
708
709 server->client = rpc_clone_client(parent->client);
710 if (IS_ERR((err = server->client)))
711 goto out;
712
713 if (!IS_ERR(parent->client_sys)) {
714 server->client_sys = rpc_clone_client(parent->client_sys);
715 if (IS_ERR((err = server->client_sys)))
716 goto out;
717 }
718 if (!IS_ERR(parent->client_acl)) {
719 server->client_acl = rpc_clone_client(parent->client_acl);
720 if (IS_ERR((err = server->client_acl)))
721 goto out;
722 }
723 root_inode = nfs_fhget(sb, data->fh, data->fattr);
724 if (!root_inode)
725 goto out;
726 sb->s_root = d_alloc_root(root_inode);
727 if (!sb->s_root)
728 goto out_put_root;
729 fsinfo.fattr = data->fattr;
730 if (NFS_PROTO(root_inode)->fsinfo(server, data->fh, &fsinfo) == 0)
731 nfs_super_set_maxbytes(sb, fsinfo.maxfilesize);
732 sb->s_root->d_op = server->rpc_ops->dentry_ops;
733 sb->s_flags |= MS_ACTIVE;
734 return server;
735out_put_root:
736 iput(root_inode);
737out:
738 return err;
739}
740
741/*
742 * Copy an existing superblock and attach revised data
743 */
744static struct super_block *nfs_clone_generic_sb(struct nfs_clone_mount *data,
745 struct super_block *(*fill_sb)(struct nfs_server *, struct nfs_clone_mount *),
746 struct nfs_server *(*fill_server)(struct super_block *, struct nfs_clone_mount *))
747{
748 struct nfs_server *server;
749 struct nfs_server *parent = NFS_SB(data->sb);
750 struct super_block *sb = ERR_PTR(-EINVAL);
751 void *err = ERR_PTR(-ENOMEM);
752 char *hostname;
753 int len;
754
755 server = kmalloc(sizeof(struct nfs_server), GFP_KERNEL);
756 if (server == NULL)
757 goto out_err;
758 memcpy(server, parent, sizeof(*server));
759 hostname = (data->hostname != NULL) ? data->hostname : parent->hostname;
760 len = strlen(hostname) + 1;
761 server->hostname = kmalloc(len, GFP_KERNEL);
762 if (server->hostname == NULL)
763 goto free_server;
764 memcpy(server->hostname, hostname, len);
765 if (rpciod_up() != 0)
766 goto free_hostname;
767
768 sb = fill_sb(server, data);
769 if (IS_ERR((err = sb)) || sb->s_root)
770 goto kill_rpciod;
771
772 server = fill_server(sb, data);
773 if (IS_ERR((err = server)))
774 goto out_deactivate;
775 return sb;
776out_deactivate:
777 up_write(&sb->s_umount);
778 deactivate_super(sb);
779 return (struct super_block *)err;
780kill_rpciod:
781 rpciod_down();
782free_hostname:
783 kfree(server->hostname);
784free_server:
785 kfree(server);
786out_err:
787 return (struct super_block *)err;
788}
789
790/*
791 * Set up an NFS2/3 superblock
792 *
793 * The way this works is that the mount process passes a structure
794 * in the data argument which contains the server's IP address
795 * and the root file handle obtained from the server's mount
796 * daemon. We stash these away in the private superblock fields.
797 */
798static int
799nfs_fill_super(struct super_block *sb, struct nfs_mount_data *data, int silent)
800{
801 struct nfs_server *server;
802 rpc_authflavor_t authflavor;
803
804 server = NFS_SB(sb);
805 sb->s_blocksize_bits = 0;
806 sb->s_blocksize = 0;
807 if (data->bsize)
808 sb->s_blocksize = nfs_block_size(data->bsize, &sb->s_blocksize_bits);
809 if (data->rsize)
810 server->rsize = nfs_block_size(data->rsize, NULL);
811 if (data->wsize)
812 server->wsize = nfs_block_size(data->wsize, NULL);
813 server->flags = data->flags & NFS_MOUNT_FLAGMASK;
814
815 server->acregmin = data->acregmin*HZ;
816 server->acregmax = data->acregmax*HZ;
817 server->acdirmin = data->acdirmin*HZ;
818 server->acdirmax = data->acdirmax*HZ;
819
820 /* Start lockd here, before we might error out */
821 if (!(server->flags & NFS_MOUNT_NONLM))
822 lockd_up();
823
824 server->namelen = data->namlen;
825 server->hostname = kmalloc(strlen(data->hostname) + 1, GFP_KERNEL);
826 if (!server->hostname)
827 return -ENOMEM;
828 strcpy(server->hostname, data->hostname);
829
830 /* Check NFS protocol revision and initialize RPC op vector
831 * and file handle pool. */
832#ifdef CONFIG_NFS_V3
833 if (server->flags & NFS_MOUNT_VER3) {
834 server->rpc_ops = &nfs_v3_clientops;
835 server->caps |= NFS_CAP_READDIRPLUS;
836 } else {
837 server->rpc_ops = &nfs_v2_clientops;
838 }
839#else
840 server->rpc_ops = &nfs_v2_clientops;
841#endif
842
843 /* Fill in pseudoflavor for mount version < 5 */
844 if (!(data->flags & NFS_MOUNT_SECFLAVOUR))
845 data->pseudoflavor = RPC_AUTH_UNIX;
846 authflavor = data->pseudoflavor; /* save for sb_init() */
847 /* XXX maybe we want to add a server->pseudoflavor field */
848
849 /* Create RPC client handles */
850 server->client = nfs_create_client(server, data);
851 if (IS_ERR(server->client))
852 return PTR_ERR(server->client);
853 /* RFC 2623, sec 2.3.2 */
854 if (authflavor != RPC_AUTH_UNIX) {
855 struct rpc_auth *auth;
856
857 server->client_sys = rpc_clone_client(server->client);
858 if (IS_ERR(server->client_sys))
859 return PTR_ERR(server->client_sys);
860 auth = rpcauth_create(RPC_AUTH_UNIX, server->client_sys);
861 if (IS_ERR(auth))
862 return PTR_ERR(auth);
863 } else {
864 atomic_inc(&server->client->cl_count);
865 server->client_sys = server->client;
866 }
867 if (server->flags & NFS_MOUNT_VER3) {
868#ifdef CONFIG_NFS_V3_ACL
869 if (!(server->flags & NFS_MOUNT_NOACL)) {
870 server->client_acl = rpc_bind_new_program(server->client, &nfsacl_program, 3);
871 /* No errors! Assume that Sun nfsacls are supported */
872 if (!IS_ERR(server->client_acl))
873 server->caps |= NFS_CAP_ACLS;
874 }
875#else
876 server->flags &= ~NFS_MOUNT_NOACL;
877#endif /* CONFIG_NFS_V3_ACL */
878 /*
879 * The VFS shouldn't apply the umask to mode bits. We will
880 * do so ourselves when necessary.
881 */
882 sb->s_flags |= MS_POSIXACL;
883 if (server->namelen == 0 || server->namelen > NFS3_MAXNAMLEN)
884 server->namelen = NFS3_MAXNAMLEN;
885 sb->s_time_gran = 1;
886 } else {
887 if (server->namelen == 0 || server->namelen > NFS2_MAXNAMLEN)
888 server->namelen = NFS2_MAXNAMLEN;
889 }
890
891 sb->s_op = &nfs_sops;
892 return nfs_sb_init(sb, authflavor);
893}
894
895static int nfs_set_super(struct super_block *s, void *data)
896{
897 s->s_fs_info = data;
898 return set_anon_super(s, data);
899}
900
901static int nfs_compare_super(struct super_block *sb, void *data)
902{
903 struct nfs_server *server = data;
904 struct nfs_server *old = NFS_SB(sb);
905
906 if (old->addr.sin_addr.s_addr != server->addr.sin_addr.s_addr)
907 return 0;
908 if (old->addr.sin_port != server->addr.sin_port)
909 return 0;
910 return !nfs_compare_fh(&old->fh, &server->fh);
911}
912
913static struct super_block *nfs_get_sb(struct file_system_type *fs_type,
914 int flags, const char *dev_name, void *raw_data)
915{
916 int error;
917 struct nfs_server *server = NULL;
918 struct super_block *s;
919 struct nfs_fh *root;
920 struct nfs_mount_data *data = raw_data;
921
922 s = ERR_PTR(-EINVAL);
923 if (data == NULL) {
924 dprintk("%s: missing data argument\n", __FUNCTION__);
925 goto out_err;
926 }
927 if (data->version <= 0 || data->version > NFS_MOUNT_VERSION) {
928 dprintk("%s: bad mount version\n", __FUNCTION__);
929 goto out_err;
930 }
931 switch (data->version) {
932 case 1:
933 data->namlen = 0;
934 case 2:
935 data->bsize = 0;
936 case 3:
937 if (data->flags & NFS_MOUNT_VER3) {
938 dprintk("%s: mount structure version %d does not support NFSv3\n",
939 __FUNCTION__,
940 data->version);
941 goto out_err;
942 }
943 data->root.size = NFS2_FHSIZE;
944 memcpy(data->root.data, data->old_root.data, NFS2_FHSIZE);
945 case 4:
946 if (data->flags & NFS_MOUNT_SECFLAVOUR) {
947 dprintk("%s: mount structure version %d does not support strong security\n",
948 __FUNCTION__,
949 data->version);
950 goto out_err;
951 }
952 case 5:
953 memset(data->context, 0, sizeof(data->context));
954 }
955#ifndef CONFIG_NFS_V3
956 /* If NFSv3 is not compiled in, return -EPROTONOSUPPORT */
957 s = ERR_PTR(-EPROTONOSUPPORT);
958 if (data->flags & NFS_MOUNT_VER3) {
959 dprintk("%s: NFSv3 not compiled into kernel\n", __FUNCTION__);
960 goto out_err;
961 }
962#endif /* CONFIG_NFS_V3 */
963
964 s = ERR_PTR(-ENOMEM);
965 server = kzalloc(sizeof(struct nfs_server), GFP_KERNEL);
966 if (!server)
967 goto out_err;
968 /* Zero out the NFS state stuff */
969 init_nfsv4_state(server);
970 server->client = server->client_sys = server->client_acl = ERR_PTR(-EINVAL);
971
972 root = &server->fh;
973 if (data->flags & NFS_MOUNT_VER3)
974 root->size = data->root.size;
975 else
976 root->size = NFS2_FHSIZE;
977 s = ERR_PTR(-EINVAL);
978 if (root->size > sizeof(root->data)) {
979 dprintk("%s: invalid root filehandle\n", __FUNCTION__);
980 goto out_err;
981 }
982 memcpy(root->data, data->root.data, root->size);
983
984 /* We now require that the mount process passes the remote address */
985 memcpy(&server->addr, &data->addr, sizeof(server->addr));
986 if (server->addr.sin_addr.s_addr == INADDR_ANY) {
987 dprintk("%s: mount program didn't pass remote address!\n",
988 __FUNCTION__);
989 goto out_err;
990 }
991
992 /* Fire up rpciod if not yet running */
993 s = ERR_PTR(rpciod_up());
994 if (IS_ERR(s)) {
995 dprintk("%s: couldn't start rpciod! Error = %ld\n",
996 __FUNCTION__, PTR_ERR(s));
997 goto out_err;
998 }
999
1000 s = sget(fs_type, nfs_compare_super, nfs_set_super, server);
1001 if (IS_ERR(s) || s->s_root)
1002 goto out_rpciod_down;
1003
1004 s->s_flags = flags;
1005
1006 error = nfs_fill_super(s, data, flags & MS_SILENT ? 1 : 0);
1007 if (error) {
1008 up_write(&s->s_umount);
1009 deactivate_super(s);
1010 return ERR_PTR(error);
1011 }
1012 s->s_flags |= MS_ACTIVE;
1013 return s;
1014out_rpciod_down:
1015 rpciod_down();
1016out_err:
1017 kfree(server);
1018 return s;
1019}
1020
1021static void nfs_kill_super(struct super_block *s)
1022{
1023 struct nfs_server *server = NFS_SB(s);
1024
1025 kill_anon_super(s);
1026
1027 if (!IS_ERR(server->client))
1028 rpc_shutdown_client(server->client);
1029 if (!IS_ERR(server->client_sys))
1030 rpc_shutdown_client(server->client_sys);
1031 if (!IS_ERR(server->client_acl))
1032 rpc_shutdown_client(server->client_acl);
1033
1034 if (!(server->flags & NFS_MOUNT_NONLM))
1035 lockd_down(); /* release rpc.lockd */
1036
1037 rpciod_down(); /* release rpciod */
1038
1039 nfs_free_iostats(server->io_stats);
1040 kfree(server->hostname);
1041 kfree(server);
1042 nfs_release_automount_timer();
1043}
1044
1045static struct super_block *nfs_clone_sb(struct nfs_server *server, struct nfs_clone_mount *data)
1046{
1047 struct super_block *sb;
1048
1049 server->fsid = data->fattr->fsid;
1050 nfs_copy_fh(&server->fh, data->fh);
1051 sb = sget(&nfs_fs_type, nfs_compare_super, nfs_set_super, server);
1052 if (!IS_ERR(sb) && sb->s_root == NULL && !(server->flags & NFS_MOUNT_NONLM))
1053 lockd_up();
1054 return sb;
1055}
1056
1057static struct super_block *nfs_clone_nfs_sb(struct file_system_type *fs_type,
1058 int flags, const char *dev_name, void *raw_data)
1059{
1060 struct nfs_clone_mount *data = raw_data;
1061 return nfs_clone_generic_sb(data, nfs_clone_sb, nfs_clone_server);
1062}
1063
1064#ifdef CONFIG_NFS_V4
1065static struct rpc_clnt *nfs4_create_client(struct nfs_server *server,
1066 struct rpc_timeout *timeparms, int proto, rpc_authflavor_t flavor)
1067{
1068 struct nfs4_client *clp;
1069 struct rpc_xprt *xprt = NULL;
1070 struct rpc_clnt *clnt = NULL;
1071 int err = -EIO;
1072
1073 clp = nfs4_get_client(&server->addr.sin_addr);
1074 if (!clp) {
1075 dprintk("%s: failed to create NFS4 client.\n", __FUNCTION__);
1076 return ERR_PTR(err);
1077 }
1078
1079 /* Now create transport and client */
1080 down_write(&clp->cl_sem);
1081 if (IS_ERR(clp->cl_rpcclient)) {
1082 xprt = xprt_create_proto(proto, &server->addr, timeparms);
1083 if (IS_ERR(xprt)) {
1084 up_write(&clp->cl_sem);
1085 err = PTR_ERR(xprt);
1086 dprintk("%s: cannot create RPC transport. Error = %d\n",
1087 __FUNCTION__, err);
1088 goto out_fail;
1089 }
1090 /* Bind to a reserved port! */
1091 xprt->resvport = 1;
1092 clnt = rpc_create_client(xprt, server->hostname, &nfs_program,
1093 server->rpc_ops->version, flavor);
1094 if (IS_ERR(clnt)) {
1095 up_write(&clp->cl_sem);
1096 err = PTR_ERR(clnt);
1097 dprintk("%s: cannot create RPC client. Error = %d\n",
1098 __FUNCTION__, err);
1099 goto out_fail;
1100 }
1101 clnt->cl_intr = 1;
1102 clnt->cl_softrtry = 1;
1103 clp->cl_rpcclient = clnt;
1104 memcpy(clp->cl_ipaddr, server->ip_addr, sizeof(clp->cl_ipaddr));
1105 nfs_idmap_new(clp);
1106 }
1107 list_add_tail(&server->nfs4_siblings, &clp->cl_superblocks);
1108 clnt = rpc_clone_client(clp->cl_rpcclient);
1109 if (!IS_ERR(clnt))
1110 server->nfs4_state = clp;
1111 up_write(&clp->cl_sem);
1112 clp = NULL;
1113
1114 if (IS_ERR(clnt)) {
1115 dprintk("%s: cannot create RPC client. Error = %d\n",
1116 __FUNCTION__, err);
1117 return clnt;
1118 }
1119
1120 if (server->nfs4_state->cl_idmap == NULL) {
1121 dprintk("%s: failed to create idmapper.\n", __FUNCTION__);
1122 return ERR_PTR(-ENOMEM);
1123 }
1124
1125 if (clnt->cl_auth->au_flavor != flavor) {
1126 struct rpc_auth *auth;
1127
1128 auth = rpcauth_create(flavor, clnt);
1129 if (IS_ERR(auth)) {
1130 dprintk("%s: couldn't create credcache!\n", __FUNCTION__);
1131 return (struct rpc_clnt *)auth;
1132 }
1133 }
1134 return clnt;
1135
1136 out_fail:
1137 if (clp)
1138 nfs4_put_client(clp);
1139 return ERR_PTR(err);
1140}
1141
1142/*
1143 * Set up an NFS4 superblock
1144 */
1145static int nfs4_fill_super(struct super_block *sb, struct nfs4_mount_data *data, int silent)
1146{
1147 struct nfs_server *server;
1148 struct rpc_timeout timeparms;
1149 rpc_authflavor_t authflavour;
1150 int err = -EIO;
1151
1152 sb->s_blocksize_bits = 0;
1153 sb->s_blocksize = 0;
1154 server = NFS_SB(sb);
1155 if (data->rsize != 0)
1156 server->rsize = nfs_block_size(data->rsize, NULL);
1157 if (data->wsize != 0)
1158 server->wsize = nfs_block_size(data->wsize, NULL);
1159 server->flags = data->flags & NFS_MOUNT_FLAGMASK;
1160 server->caps = NFS_CAP_ATOMIC_OPEN;
1161
1162 server->acregmin = data->acregmin*HZ;
1163 server->acregmax = data->acregmax*HZ;
1164 server->acdirmin = data->acdirmin*HZ;
1165 server->acdirmax = data->acdirmax*HZ;
1166
1167 server->rpc_ops = &nfs_v4_clientops;
1168
1169 nfs_init_timeout_values(&timeparms, data->proto, data->timeo, data->retrans);
1170
1171 server->retrans_timeo = timeparms.to_initval;
1172 server->retrans_count = timeparms.to_retries;
1173
1174 /* Now create transport and client */
1175 authflavour = RPC_AUTH_UNIX;
1176 if (data->auth_flavourlen != 0) {
1177 if (data->auth_flavourlen != 1) {
1178 dprintk("%s: Invalid number of RPC auth flavours %d.\n",
1179 __FUNCTION__, data->auth_flavourlen);
1180 err = -EINVAL;
1181 goto out_fail;
1182 }
1183 if (copy_from_user(&authflavour, data->auth_flavours, sizeof(authflavour))) {
1184 err = -EFAULT;
1185 goto out_fail;
1186 }
1187 }
1188
1189 server->client = nfs4_create_client(server, &timeparms, data->proto, authflavour);
1190 if (IS_ERR(server->client)) {
1191 err = PTR_ERR(server->client);
1192 dprintk("%s: cannot create RPC client. Error = %d\n",
1193 __FUNCTION__, err);
1194 goto out_fail;
1195 }
1196
1197 sb->s_time_gran = 1;
1198
1199 sb->s_op = &nfs4_sops;
1200 err = nfs_sb_init(sb, authflavour);
1201
1202 out_fail:
1203 return err;
1204}
1205
1206static int nfs4_compare_super(struct super_block *sb, void *data)
1207{
1208 struct nfs_server *server = data;
1209 struct nfs_server *old = NFS_SB(sb);
1210
1211 if (strcmp(server->hostname, old->hostname) != 0)
1212 return 0;
1213 if (strcmp(server->mnt_path, old->mnt_path) != 0)
1214 return 0;
1215 return 1;
1216}
1217
1218static void *
1219nfs_copy_user_string(char *dst, struct nfs_string *src, int maxlen)
1220{
1221 void *p = NULL;
1222
1223 if (!src->len)
1224 return ERR_PTR(-EINVAL);
1225 if (src->len < maxlen)
1226 maxlen = src->len;
1227 if (dst == NULL) {
1228 p = dst = kmalloc(maxlen + 1, GFP_KERNEL);
1229 if (p == NULL)
1230 return ERR_PTR(-ENOMEM);
1231 }
1232 if (copy_from_user(dst, src->data, maxlen)) {
1233 kfree(p);
1234 return ERR_PTR(-EFAULT);
1235 }
1236 dst[maxlen] = '\0';
1237 return dst;
1238}
1239
1240static struct super_block *nfs4_get_sb(struct file_system_type *fs_type,
1241 int flags, const char *dev_name, void *raw_data)
1242{
1243 int error;
1244 struct nfs_server *server;
1245 struct super_block *s;
1246 struct nfs4_mount_data *data = raw_data;
1247 void *p;
1248
1249 if (data == NULL) {
1250 dprintk("%s: missing data argument\n", __FUNCTION__);
1251 return ERR_PTR(-EINVAL);
1252 }
1253 if (data->version <= 0 || data->version > NFS4_MOUNT_VERSION) {
1254 dprintk("%s: bad mount version\n", __FUNCTION__);
1255 return ERR_PTR(-EINVAL);
1256 }
1257
1258 server = kzalloc(sizeof(struct nfs_server), GFP_KERNEL);
1259 if (!server)
1260 return ERR_PTR(-ENOMEM);
1261 /* Zero out the NFS state stuff */
1262 init_nfsv4_state(server);
1263 server->client = server->client_sys = server->client_acl = ERR_PTR(-EINVAL);
1264
1265 p = nfs_copy_user_string(NULL, &data->hostname, 256);
1266 if (IS_ERR(p))
1267 goto out_err;
1268 server->hostname = p;
1269
1270 p = nfs_copy_user_string(NULL, &data->mnt_path, 1024);
1271 if (IS_ERR(p))
1272 goto out_err;
1273 server->mnt_path = p;
1274
1275 p = nfs_copy_user_string(server->ip_addr, &data->client_addr,
1276 sizeof(server->ip_addr) - 1);
1277 if (IS_ERR(p))
1278 goto out_err;
1279
1280 /* We now require that the mount process passes the remote address */
1281 if (data->host_addrlen != sizeof(server->addr)) {
1282 s = ERR_PTR(-EINVAL);
1283 goto out_free;
1284 }
1285 if (copy_from_user(&server->addr, data->host_addr, sizeof(server->addr))) {
1286 s = ERR_PTR(-EFAULT);
1287 goto out_free;
1288 }
1289 if (server->addr.sin_family != AF_INET ||
1290 server->addr.sin_addr.s_addr == INADDR_ANY) {
1291 dprintk("%s: mount program didn't pass remote IP address!\n",
1292 __FUNCTION__);
1293 s = ERR_PTR(-EINVAL);
1294 goto out_free;
1295 }
1296
1297 /* Fire up rpciod if not yet running */
1298 s = ERR_PTR(rpciod_up());
1299 if (IS_ERR(s)) {
1300 dprintk("%s: couldn't start rpciod! Error = %ld\n",
1301 __FUNCTION__, PTR_ERR(s));
1302 goto out_free;
1303 }
1304
1305 s = sget(fs_type, nfs4_compare_super, nfs_set_super, server);
1306
1307 if (IS_ERR(s) || s->s_root)
1308 goto out_free;
1309
1310 s->s_flags = flags;
1311
1312 error = nfs4_fill_super(s, data, flags & MS_SILENT ? 1 : 0);
1313 if (error) {
1314 up_write(&s->s_umount);
1315 deactivate_super(s);
1316 return ERR_PTR(error);
1317 }
1318 s->s_flags |= MS_ACTIVE;
1319 return s;
1320out_err:
1321 s = (struct super_block *)p;
1322out_free:
1323 kfree(server->mnt_path);
1324 kfree(server->hostname);
1325 kfree(server);
1326 return s;
1327}
1328
1329static void nfs4_kill_super(struct super_block *sb)
1330{
1331 struct nfs_server *server = NFS_SB(sb);
1332
1333 nfs_return_all_delegations(sb);
1334 kill_anon_super(sb);
1335
1336 nfs4_renewd_prepare_shutdown(server);
1337
1338 if (server->client != NULL && !IS_ERR(server->client))
1339 rpc_shutdown_client(server->client);
1340
1341 destroy_nfsv4_state(server);
1342
1343 rpciod_down();
1344
1345 nfs_free_iostats(server->io_stats);
1346 kfree(server->hostname);
1347 kfree(server);
1348 nfs_release_automount_timer();
1349}
1350
1351/*
1352 * Constructs the SERVER-side path
1353 */
1354static inline char *nfs4_dup_path(const struct dentry *dentry)
1355{
1356 char *page = (char *) __get_free_page(GFP_USER);
1357 char *path;
1358
1359 path = nfs4_path(dentry, page, PAGE_SIZE);
1360 if (!IS_ERR(path)) {
1361 int len = PAGE_SIZE + page - path;
1362 char *tmp = path;
1363
1364 path = kmalloc(len, GFP_KERNEL);
1365 if (path)
1366 memcpy(path, tmp, len);
1367 else
1368 path = ERR_PTR(-ENOMEM);
1369 }
1370 free_page((unsigned long)page);
1371 return path;
1372}
1373
1374static struct super_block *nfs4_clone_sb(struct nfs_server *server, struct nfs_clone_mount *data)
1375{
1376 const struct dentry *dentry = data->dentry;
1377 struct nfs4_client *clp = server->nfs4_state;
1378 struct super_block *sb;
1379
1380 server->fsid = data->fattr->fsid;
1381 nfs_copy_fh(&server->fh, data->fh);
1382 server->mnt_path = nfs4_dup_path(dentry);
1383 if (IS_ERR(server->mnt_path)) {
1384 sb = (struct super_block *)server->mnt_path;
1385 goto err;
1386 }
1387 sb = sget(&nfs4_fs_type, nfs4_compare_super, nfs_set_super, server);
1388 if (IS_ERR(sb) || sb->s_root)
1389 goto free_path;
1390 nfs4_server_capabilities(server, &server->fh);
1391
1392 down_write(&clp->cl_sem);
1393 atomic_inc(&clp->cl_count);
1394 list_add_tail(&server->nfs4_siblings, &clp->cl_superblocks);
1395 up_write(&clp->cl_sem);
1396 return sb;
1397free_path:
1398 kfree(server->mnt_path);
1399err:
1400 server->mnt_path = NULL;
1401 return sb;
1402}
1403
1404static struct super_block *nfs_clone_nfs4_sb(struct file_system_type *fs_type,
1405 int flags, const char *dev_name, void *raw_data)
1406{
1407 struct nfs_clone_mount *data = raw_data;
1408 return nfs_clone_generic_sb(data, nfs4_clone_sb, nfs_clone_server);
1409}
1410
1411static struct super_block *nfs4_referral_sb(struct nfs_server *server, struct nfs_clone_mount *data)
1412{
1413 struct super_block *sb = ERR_PTR(-ENOMEM);
1414 int len;
1415
1416 len = strlen(data->mnt_path) + 1;
1417 server->mnt_path = kmalloc(len, GFP_KERNEL);
1418 if (server->mnt_path == NULL)
1419 goto err;
1420 memcpy(server->mnt_path, data->mnt_path, len);
1421 memcpy(&server->addr, data->addr, sizeof(struct sockaddr_in));
1422
1423 sb = sget(&nfs4_fs_type, nfs4_compare_super, nfs_set_super, server);
1424 if (IS_ERR(sb) || sb->s_root)
1425 goto free_path;
1426 return sb;
1427free_path:
1428 kfree(server->mnt_path);
1429err:
1430 server->mnt_path = NULL;
1431 return sb;
1432}
1433
1434static struct nfs_server *nfs4_referral_server(struct super_block *sb, struct nfs_clone_mount *data)
1435{
1436 struct nfs_server *server = NFS_SB(sb);
1437 struct rpc_timeout timeparms;
1438 int proto, timeo, retrans;
1439 void *err;
1440
1441 proto = IPPROTO_TCP;
1442 /* Since we are following a referral and there may be alternatives,
1443 set the timeouts and retries to low values */
1444 timeo = 2;
1445 retrans = 1;
1446 nfs_init_timeout_values(&timeparms, proto, timeo, retrans);
1447
1448 server->client = nfs4_create_client(server, &timeparms, proto, data->authflavor);
1449 if (IS_ERR((err = server->client)))
1450 goto out_err;
1451
1452 sb->s_time_gran = 1;
1453 sb->s_op = &nfs4_sops;
1454 err = ERR_PTR(nfs_sb_init(sb, data->authflavor));
1455 if (!IS_ERR(err))
1456 return server;
1457out_err:
1458 return (struct nfs_server *)err;
1459}
1460
1461static struct super_block *nfs_referral_nfs4_sb(struct file_system_type *fs_type,
1462 int flags, const char *dev_name, void *raw_data)
1463{
1464 struct nfs_clone_mount *data = raw_data;
1465 return nfs_clone_generic_sb(data, nfs4_referral_sb, nfs4_referral_server);
1466}
1467
1468#endif
diff --git a/fs/nfs/write.c b/fs/nfs/write.c
index e03abbd8302e..b383fdd3a15c 100644
--- a/fs/nfs/write.c
+++ b/fs/nfs/write.c
@@ -1529,7 +1529,7 @@ int nfs_sync_inode_wait(struct inode *inode, unsigned long idx_start,
1529 return ret; 1529 return ret;
1530} 1530}
1531 1531
1532int nfs_init_writepagecache(void) 1532int __init nfs_init_writepagecache(void)
1533{ 1533{
1534 nfs_wdata_cachep = kmem_cache_create("nfs_write_data", 1534 nfs_wdata_cachep = kmem_cache_create("nfs_write_data",
1535 sizeof(struct nfs_write_data), 1535 sizeof(struct nfs_write_data),
@@ -1551,7 +1551,7 @@ int nfs_init_writepagecache(void)
1551 return 0; 1551 return 0;
1552} 1552}
1553 1553
1554void nfs_destroy_writepagecache(void) 1554void __exit nfs_destroy_writepagecache(void)
1555{ 1555{
1556 mempool_destroy(nfs_commit_mempool); 1556 mempool_destroy(nfs_commit_mempool);
1557 mempool_destroy(nfs_wdata_mempool); 1557 mempool_destroy(nfs_wdata_mempool);
generated by cgit v1.2.2 (git 2.25.0) at 2025-10-28 16:07:14 -0400