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-rw-r--r--fs/nfs/inode.c1315
1 files changed, 67 insertions, 1248 deletions
diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c
index 937fbfc381bb..51bc88b662fe 100644
--- a/fs/nfs/inode.c
+++ b/fs/nfs/inode.c
@@ -36,6 +36,8 @@
36#include <linux/mount.h> 36#include <linux/mount.h>
37#include <linux/nfs_idmap.h> 37#include <linux/nfs_idmap.h>
38#include <linux/vfs.h> 38#include <linux/vfs.h>
39#include <linux/inet.h>
40#include <linux/nfs_xdr.h>
39 41
40#include <asm/system.h> 42#include <asm/system.h>
41#include <asm/uaccess.h> 43#include <asm/uaccess.h>
@@ -44,89 +46,17 @@
44#include "callback.h" 46#include "callback.h"
45#include "delegation.h" 47#include "delegation.h"
46#include "iostat.h" 48#include "iostat.h"
49#include "internal.h"
47 50
48#define NFSDBG_FACILITY NFSDBG_VFS 51#define NFSDBG_FACILITY NFSDBG_VFS
49#define NFS_PARANOIA 1 52#define NFS_PARANOIA 1
50 53
51/* Maximum number of readahead requests
52 * FIXME: this should really be a sysctl so that users may tune it to suit
53 * their needs. People that do NFS over a slow network, might for
54 * instance want to reduce it to something closer to 1 for improved
55 * interactive response.
56 */
57#define NFS_MAX_READAHEAD (RPC_DEF_SLOT_TABLE - 1)
58
59static void nfs_invalidate_inode(struct inode *); 54static void nfs_invalidate_inode(struct inode *);
60static int nfs_update_inode(struct inode *, struct nfs_fattr *); 55static int nfs_update_inode(struct inode *, struct nfs_fattr *);
61 56
62static struct inode *nfs_alloc_inode(struct super_block *sb);
63static void nfs_destroy_inode(struct inode *);
64static int nfs_write_inode(struct inode *,int);
65static void nfs_delete_inode(struct inode *);
66static void nfs_clear_inode(struct inode *);
67static void nfs_umount_begin(struct super_block *);
68static int nfs_statfs(struct dentry *, struct kstatfs *);
69static int nfs_show_options(struct seq_file *, struct vfsmount *);
70static int nfs_show_stats(struct seq_file *, struct vfsmount *);
71static void nfs_zap_acl_cache(struct inode *); 57static void nfs_zap_acl_cache(struct inode *);
72 58
73static struct rpc_program nfs_program; 59static kmem_cache_t * nfs_inode_cachep;
74
75static struct super_operations nfs_sops = {
76 .alloc_inode = nfs_alloc_inode,
77 .destroy_inode = nfs_destroy_inode,
78 .write_inode = nfs_write_inode,
79 .delete_inode = nfs_delete_inode,
80 .statfs = nfs_statfs,
81 .clear_inode = nfs_clear_inode,
82 .umount_begin = nfs_umount_begin,
83 .show_options = nfs_show_options,
84 .show_stats = nfs_show_stats,
85};
86
87/*
88 * RPC cruft for NFS
89 */
90static struct rpc_stat nfs_rpcstat = {
91 .program = &nfs_program
92};
93static struct rpc_version * nfs_version[] = {
94 NULL,
95 NULL,
96 &nfs_version2,
97#if defined(CONFIG_NFS_V3)
98 &nfs_version3,
99#elif defined(CONFIG_NFS_V4)
100 NULL,
101#endif
102#if defined(CONFIG_NFS_V4)
103 &nfs_version4,
104#endif
105};
106
107static struct rpc_program nfs_program = {
108 .name = "nfs",
109 .number = NFS_PROGRAM,
110 .nrvers = ARRAY_SIZE(nfs_version),
111 .version = nfs_version,
112 .stats = &nfs_rpcstat,
113 .pipe_dir_name = "/nfs",
114};
115
116#ifdef CONFIG_NFS_V3_ACL
117static struct rpc_stat nfsacl_rpcstat = { &nfsacl_program };
118static struct rpc_version * nfsacl_version[] = {
119 [3] = &nfsacl_version3,
120};
121
122struct rpc_program nfsacl_program = {
123 .name = "nfsacl",
124 .number = NFS_ACL_PROGRAM,
125 .nrvers = ARRAY_SIZE(nfsacl_version),
126 .version = nfsacl_version,
127 .stats = &nfsacl_rpcstat,
128};
129#endif /* CONFIG_NFS_V3_ACL */
130 60
131static inline unsigned long 61static inline unsigned long
132nfs_fattr_to_ino_t(struct nfs_fattr *fattr) 62nfs_fattr_to_ino_t(struct nfs_fattr *fattr)
@@ -134,8 +64,7 @@ nfs_fattr_to_ino_t(struct nfs_fattr *fattr)
134 return nfs_fileid_to_ino_t(fattr->fileid); 64 return nfs_fileid_to_ino_t(fattr->fileid);
135} 65}
136 66
137static int 67int nfs_write_inode(struct inode *inode, int sync)
138nfs_write_inode(struct inode *inode, int sync)
139{ 68{
140 int flags = sync ? FLUSH_SYNC : 0; 69 int flags = sync ? FLUSH_SYNC : 0;
141 int ret; 70 int ret;
@@ -146,31 +75,15 @@ nfs_write_inode(struct inode *inode, int sync)
146 return 0; 75 return 0;
147} 76}
148 77
149static void 78void nfs_clear_inode(struct inode *inode)
150nfs_delete_inode(struct inode * inode)
151{ 79{
152 dprintk("NFS: delete_inode(%s/%ld)\n", inode->i_sb->s_id, inode->i_ino); 80 struct nfs_inode *nfsi = NFS_I(inode);
153 81 struct rpc_cred *cred;
154 truncate_inode_pages(&inode->i_data, 0);
155 82
156 nfs_wb_all(inode);
157 /* 83 /*
158 * The following should never happen... 84 * The following should never happen...
159 */ 85 */
160 if (nfs_have_writebacks(inode)) { 86 BUG_ON(nfs_have_writebacks(inode));
161 printk(KERN_ERR "nfs_delete_inode: inode %ld has pending RPC requests\n", inode->i_ino);
162 }
163
164 clear_inode(inode);
165}
166
167static void
168nfs_clear_inode(struct inode *inode)
169{
170 struct nfs_inode *nfsi = NFS_I(inode);
171 struct rpc_cred *cred;
172
173 nfs_wb_all(inode);
174 BUG_ON (!list_empty(&nfsi->open_files)); 87 BUG_ON (!list_empty(&nfsi->open_files));
175 nfs_zap_acl_cache(inode); 88 nfs_zap_acl_cache(inode);
176 cred = nfsi->cache_access.cred; 89 cred = nfsi->cache_access.cred;
@@ -179,555 +92,6 @@ nfs_clear_inode(struct inode *inode)
179 BUG_ON(atomic_read(&nfsi->data_updates) != 0); 92 BUG_ON(atomic_read(&nfsi->data_updates) != 0);
180} 93}
181 94
182void
183nfs_umount_begin(struct super_block *sb)
184{
185 struct rpc_clnt *rpc = NFS_SB(sb)->client;
186
187 /* -EIO all pending I/O */
188 if (!IS_ERR(rpc))
189 rpc_killall_tasks(rpc);
190 rpc = NFS_SB(sb)->client_acl;
191 if (!IS_ERR(rpc))
192 rpc_killall_tasks(rpc);
193}
194
195
196static inline unsigned long
197nfs_block_bits(unsigned long bsize, unsigned char *nrbitsp)
198{
199 /* make sure blocksize is a power of two */
200 if ((bsize & (bsize - 1)) || nrbitsp) {
201 unsigned char nrbits;
202
203 for (nrbits = 31; nrbits && !(bsize & (1 << nrbits)); nrbits--)
204 ;
205 bsize = 1 << nrbits;
206 if (nrbitsp)
207 *nrbitsp = nrbits;
208 }
209
210 return bsize;
211}
212
213/*
214 * Calculate the number of 512byte blocks used.
215 */
216static inline unsigned long
217nfs_calc_block_size(u64 tsize)
218{
219 loff_t used = (tsize + 511) >> 9;
220 return (used > ULONG_MAX) ? ULONG_MAX : used;
221}
222
223/*
224 * Compute and set NFS server blocksize
225 */
226static inline unsigned long
227nfs_block_size(unsigned long bsize, unsigned char *nrbitsp)
228{
229 if (bsize < NFS_MIN_FILE_IO_SIZE)
230 bsize = NFS_DEF_FILE_IO_SIZE;
231 else if (bsize >= NFS_MAX_FILE_IO_SIZE)
232 bsize = NFS_MAX_FILE_IO_SIZE;
233
234 return nfs_block_bits(bsize, nrbitsp);
235}
236
237/*
238 * Obtain the root inode of the file system.
239 */
240static struct inode *
241nfs_get_root(struct super_block *sb, struct nfs_fh *rootfh, struct nfs_fsinfo *fsinfo)
242{
243 struct nfs_server *server = NFS_SB(sb);
244 int error;
245
246 error = server->rpc_ops->getroot(server, rootfh, fsinfo);
247 if (error < 0) {
248 dprintk("nfs_get_root: getattr error = %d\n", -error);
249 return ERR_PTR(error);
250 }
251
252 return nfs_fhget(sb, rootfh, fsinfo->fattr);
253}
254
255/*
256 * Do NFS version-independent mount processing, and sanity checking
257 */
258static int
259nfs_sb_init(struct super_block *sb, rpc_authflavor_t authflavor)
260{
261 struct nfs_server *server;
262 struct inode *root_inode;
263 struct nfs_fattr fattr;
264 struct nfs_fsinfo fsinfo = {
265 .fattr = &fattr,
266 };
267 struct nfs_pathconf pathinfo = {
268 .fattr = &fattr,
269 };
270 int no_root_error = 0;
271 unsigned long max_rpc_payload;
272
273 /* We probably want something more informative here */
274 snprintf(sb->s_id, sizeof(sb->s_id), "%x:%x", MAJOR(sb->s_dev), MINOR(sb->s_dev));
275
276 server = NFS_SB(sb);
277
278 sb->s_magic = NFS_SUPER_MAGIC;
279
280 server->io_stats = nfs_alloc_iostats();
281 if (server->io_stats == NULL)
282 return -ENOMEM;
283
284 root_inode = nfs_get_root(sb, &server->fh, &fsinfo);
285 /* Did getting the root inode fail? */
286 if (IS_ERR(root_inode)) {
287 no_root_error = PTR_ERR(root_inode);
288 goto out_no_root;
289 }
290 sb->s_root = d_alloc_root(root_inode);
291 if (!sb->s_root) {
292 no_root_error = -ENOMEM;
293 goto out_no_root;
294 }
295 sb->s_root->d_op = server->rpc_ops->dentry_ops;
296
297 /* mount time stamp, in seconds */
298 server->mount_time = jiffies;
299
300 /* Get some general file system info */
301 if (server->namelen == 0 &&
302 server->rpc_ops->pathconf(server, &server->fh, &pathinfo) >= 0)
303 server->namelen = pathinfo.max_namelen;
304 /* Work out a lot of parameters */
305 if (server->rsize == 0)
306 server->rsize = nfs_block_size(fsinfo.rtpref, NULL);
307 if (server->wsize == 0)
308 server->wsize = nfs_block_size(fsinfo.wtpref, NULL);
309
310 if (fsinfo.rtmax >= 512 && server->rsize > fsinfo.rtmax)
311 server->rsize = nfs_block_size(fsinfo.rtmax, NULL);
312 if (fsinfo.wtmax >= 512 && server->wsize > fsinfo.wtmax)
313 server->wsize = nfs_block_size(fsinfo.wtmax, NULL);
314
315 max_rpc_payload = nfs_block_size(rpc_max_payload(server->client), NULL);
316 if (server->rsize > max_rpc_payload)
317 server->rsize = max_rpc_payload;
318 if (server->rsize > NFS_MAX_FILE_IO_SIZE)
319 server->rsize = NFS_MAX_FILE_IO_SIZE;
320 server->rpages = (server->rsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
321
322 if (server->wsize > max_rpc_payload)
323 server->wsize = max_rpc_payload;
324 if (server->wsize > NFS_MAX_FILE_IO_SIZE)
325 server->wsize = NFS_MAX_FILE_IO_SIZE;
326 server->wpages = (server->wsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
327
328 if (sb->s_blocksize == 0)
329 sb->s_blocksize = nfs_block_bits(server->wsize,
330 &sb->s_blocksize_bits);
331 server->wtmult = nfs_block_bits(fsinfo.wtmult, NULL);
332
333 server->dtsize = nfs_block_size(fsinfo.dtpref, NULL);
334 if (server->dtsize > PAGE_CACHE_SIZE)
335 server->dtsize = PAGE_CACHE_SIZE;
336 if (server->dtsize > server->rsize)
337 server->dtsize = server->rsize;
338
339 if (server->flags & NFS_MOUNT_NOAC) {
340 server->acregmin = server->acregmax = 0;
341 server->acdirmin = server->acdirmax = 0;
342 sb->s_flags |= MS_SYNCHRONOUS;
343 }
344 server->backing_dev_info.ra_pages = server->rpages * NFS_MAX_READAHEAD;
345
346 sb->s_maxbytes = fsinfo.maxfilesize;
347 if (sb->s_maxbytes > MAX_LFS_FILESIZE)
348 sb->s_maxbytes = MAX_LFS_FILESIZE;
349
350 server->client->cl_intr = (server->flags & NFS_MOUNT_INTR) ? 1 : 0;
351 server->client->cl_softrtry = (server->flags & NFS_MOUNT_SOFT) ? 1 : 0;
352
353 /* We're airborne Set socket buffersize */
354 rpc_setbufsize(server->client, server->wsize + 100, server->rsize + 100);
355 return 0;
356 /* Yargs. It didn't work out. */
357out_no_root:
358 dprintk("nfs_sb_init: get root inode failed: errno %d\n", -no_root_error);
359 if (!IS_ERR(root_inode))
360 iput(root_inode);
361 return no_root_error;
362}
363
364static void nfs_init_timeout_values(struct rpc_timeout *to, int proto, unsigned int timeo, unsigned int retrans)
365{
366 to->to_initval = timeo * HZ / 10;
367 to->to_retries = retrans;
368 if (!to->to_retries)
369 to->to_retries = 2;
370
371 switch (proto) {
372 case IPPROTO_TCP:
373 if (!to->to_initval)
374 to->to_initval = 60 * HZ;
375 if (to->to_initval > NFS_MAX_TCP_TIMEOUT)
376 to->to_initval = NFS_MAX_TCP_TIMEOUT;
377 to->to_increment = to->to_initval;
378 to->to_maxval = to->to_initval + (to->to_increment * to->to_retries);
379 to->to_exponential = 0;
380 break;
381 case IPPROTO_UDP:
382 default:
383 if (!to->to_initval)
384 to->to_initval = 11 * HZ / 10;
385 if (to->to_initval > NFS_MAX_UDP_TIMEOUT)
386 to->to_initval = NFS_MAX_UDP_TIMEOUT;
387 to->to_maxval = NFS_MAX_UDP_TIMEOUT;
388 to->to_exponential = 1;
389 break;
390 }
391}
392
393/*
394 * Create an RPC client handle.
395 */
396static struct rpc_clnt *
397nfs_create_client(struct nfs_server *server, const struct nfs_mount_data *data)
398{
399 struct rpc_timeout timeparms;
400 struct rpc_xprt *xprt = NULL;
401 struct rpc_clnt *clnt = NULL;
402 int proto = (data->flags & NFS_MOUNT_TCP) ? IPPROTO_TCP : IPPROTO_UDP;
403
404 nfs_init_timeout_values(&timeparms, proto, data->timeo, data->retrans);
405
406 server->retrans_timeo = timeparms.to_initval;
407 server->retrans_count = timeparms.to_retries;
408
409 /* create transport and client */
410 xprt = xprt_create_proto(proto, &server->addr, &timeparms);
411 if (IS_ERR(xprt)) {
412 dprintk("%s: cannot create RPC transport. Error = %ld\n",
413 __FUNCTION__, PTR_ERR(xprt));
414 return (struct rpc_clnt *)xprt;
415 }
416 clnt = rpc_create_client(xprt, server->hostname, &nfs_program,
417 server->rpc_ops->version, data->pseudoflavor);
418 if (IS_ERR(clnt)) {
419 dprintk("%s: cannot create RPC client. Error = %ld\n",
420 __FUNCTION__, PTR_ERR(xprt));
421 goto out_fail;
422 }
423
424 clnt->cl_intr = 1;
425 clnt->cl_softrtry = 1;
426
427 return clnt;
428
429out_fail:
430 return clnt;
431}
432
433/*
434 * The way this works is that the mount process passes a structure
435 * in the data argument which contains the server's IP address
436 * and the root file handle obtained from the server's mount
437 * daemon. We stash these away in the private superblock fields.
438 */
439static int
440nfs_fill_super(struct super_block *sb, struct nfs_mount_data *data, int silent)
441{
442 struct nfs_server *server;
443 rpc_authflavor_t authflavor;
444
445 server = NFS_SB(sb);
446 sb->s_blocksize_bits = 0;
447 sb->s_blocksize = 0;
448 if (data->bsize)
449 sb->s_blocksize = nfs_block_size(data->bsize, &sb->s_blocksize_bits);
450 if (data->rsize)
451 server->rsize = nfs_block_size(data->rsize, NULL);
452 if (data->wsize)
453 server->wsize = nfs_block_size(data->wsize, NULL);
454 server->flags = data->flags & NFS_MOUNT_FLAGMASK;
455
456 server->acregmin = data->acregmin*HZ;
457 server->acregmax = data->acregmax*HZ;
458 server->acdirmin = data->acdirmin*HZ;
459 server->acdirmax = data->acdirmax*HZ;
460
461 /* Start lockd here, before we might error out */
462 if (!(server->flags & NFS_MOUNT_NONLM))
463 lockd_up();
464
465 server->namelen = data->namlen;
466 server->hostname = kmalloc(strlen(data->hostname) + 1, GFP_KERNEL);
467 if (!server->hostname)
468 return -ENOMEM;
469 strcpy(server->hostname, data->hostname);
470
471 /* Check NFS protocol revision and initialize RPC op vector
472 * and file handle pool. */
473#ifdef CONFIG_NFS_V3
474 if (server->flags & NFS_MOUNT_VER3) {
475 server->rpc_ops = &nfs_v3_clientops;
476 server->caps |= NFS_CAP_READDIRPLUS;
477 } else {
478 server->rpc_ops = &nfs_v2_clientops;
479 }
480#else
481 server->rpc_ops = &nfs_v2_clientops;
482#endif
483
484 /* Fill in pseudoflavor for mount version < 5 */
485 if (!(data->flags & NFS_MOUNT_SECFLAVOUR))
486 data->pseudoflavor = RPC_AUTH_UNIX;
487 authflavor = data->pseudoflavor; /* save for sb_init() */
488 /* XXX maybe we want to add a server->pseudoflavor field */
489
490 /* Create RPC client handles */
491 server->client = nfs_create_client(server, data);
492 if (IS_ERR(server->client))
493 return PTR_ERR(server->client);
494 /* RFC 2623, sec 2.3.2 */
495 if (authflavor != RPC_AUTH_UNIX) {
496 struct rpc_auth *auth;
497
498 server->client_sys = rpc_clone_client(server->client);
499 if (IS_ERR(server->client_sys))
500 return PTR_ERR(server->client_sys);
501 auth = rpcauth_create(RPC_AUTH_UNIX, server->client_sys);
502 if (IS_ERR(auth))
503 return PTR_ERR(auth);
504 } else {
505 atomic_inc(&server->client->cl_count);
506 server->client_sys = server->client;
507 }
508 if (server->flags & NFS_MOUNT_VER3) {
509#ifdef CONFIG_NFS_V3_ACL
510 if (!(server->flags & NFS_MOUNT_NOACL)) {
511 server->client_acl = rpc_bind_new_program(server->client, &nfsacl_program, 3);
512 /* No errors! Assume that Sun nfsacls are supported */
513 if (!IS_ERR(server->client_acl))
514 server->caps |= NFS_CAP_ACLS;
515 }
516#else
517 server->flags &= ~NFS_MOUNT_NOACL;
518#endif /* CONFIG_NFS_V3_ACL */
519 /*
520 * The VFS shouldn't apply the umask to mode bits. We will
521 * do so ourselves when necessary.
522 */
523 sb->s_flags |= MS_POSIXACL;
524 if (server->namelen == 0 || server->namelen > NFS3_MAXNAMLEN)
525 server->namelen = NFS3_MAXNAMLEN;
526 sb->s_time_gran = 1;
527 } else {
528 if (server->namelen == 0 || server->namelen > NFS2_MAXNAMLEN)
529 server->namelen = NFS2_MAXNAMLEN;
530 }
531
532 sb->s_op = &nfs_sops;
533 return nfs_sb_init(sb, authflavor);
534}
535
536static int
537nfs_statfs(struct dentry *dentry, struct kstatfs *buf)
538{
539 struct super_block *sb = dentry->d_sb;
540 struct nfs_server *server = NFS_SB(sb);
541 unsigned char blockbits;
542 unsigned long blockres;
543 struct nfs_fh *rootfh = NFS_FH(sb->s_root->d_inode);
544 struct nfs_fattr fattr;
545 struct nfs_fsstat res = {
546 .fattr = &fattr,
547 };
548 int error;
549
550 lock_kernel();
551
552 error = server->rpc_ops->statfs(server, rootfh, &res);
553 buf->f_type = NFS_SUPER_MAGIC;
554 if (error < 0)
555 goto out_err;
556
557 /*
558 * Current versions of glibc do not correctly handle the
559 * case where f_frsize != f_bsize. Eventually we want to
560 * report the value of wtmult in this field.
561 */
562 buf->f_frsize = sb->s_blocksize;
563
564 /*
565 * On most *nix systems, f_blocks, f_bfree, and f_bavail
566 * are reported in units of f_frsize. Linux hasn't had
567 * an f_frsize field in its statfs struct until recently,
568 * thus historically Linux's sys_statfs reports these
569 * fields in units of f_bsize.
570 */
571 buf->f_bsize = sb->s_blocksize;
572 blockbits = sb->s_blocksize_bits;
573 blockres = (1 << blockbits) - 1;
574 buf->f_blocks = (res.tbytes + blockres) >> blockbits;
575 buf->f_bfree = (res.fbytes + blockres) >> blockbits;
576 buf->f_bavail = (res.abytes + blockres) >> blockbits;
577
578 buf->f_files = res.tfiles;
579 buf->f_ffree = res.afiles;
580
581 buf->f_namelen = server->namelen;
582 out:
583 unlock_kernel();
584 return 0;
585
586 out_err:
587 dprintk("%s: statfs error = %d\n", __FUNCTION__, -error);
588 buf->f_bsize = buf->f_blocks = buf->f_bfree = buf->f_bavail = -1;
589 goto out;
590
591}
592
593static void nfs_show_mount_options(struct seq_file *m, struct nfs_server *nfss, int showdefaults)
594{
595 static struct proc_nfs_info {
596 int flag;
597 char *str;
598 char *nostr;
599 } nfs_info[] = {
600 { NFS_MOUNT_SOFT, ",soft", ",hard" },
601 { NFS_MOUNT_INTR, ",intr", "" },
602 { NFS_MOUNT_NOCTO, ",nocto", "" },
603 { NFS_MOUNT_NOAC, ",noac", "" },
604 { NFS_MOUNT_NONLM, ",nolock", "" },
605 { NFS_MOUNT_NOACL, ",noacl", "" },
606 { 0, NULL, NULL }
607 };
608 struct proc_nfs_info *nfs_infop;
609 char buf[12];
610 char *proto;
611
612 seq_printf(m, ",vers=%d", nfss->rpc_ops->version);
613 seq_printf(m, ",rsize=%d", nfss->rsize);
614 seq_printf(m, ",wsize=%d", nfss->wsize);
615 if (nfss->acregmin != 3*HZ || showdefaults)
616 seq_printf(m, ",acregmin=%d", nfss->acregmin/HZ);
617 if (nfss->acregmax != 60*HZ || showdefaults)
618 seq_printf(m, ",acregmax=%d", nfss->acregmax/HZ);
619 if (nfss->acdirmin != 30*HZ || showdefaults)
620 seq_printf(m, ",acdirmin=%d", nfss->acdirmin/HZ);
621 if (nfss->acdirmax != 60*HZ || showdefaults)
622 seq_printf(m, ",acdirmax=%d", nfss->acdirmax/HZ);
623 for (nfs_infop = nfs_info; nfs_infop->flag; nfs_infop++) {
624 if (nfss->flags & nfs_infop->flag)
625 seq_puts(m, nfs_infop->str);
626 else
627 seq_puts(m, nfs_infop->nostr);
628 }
629 switch (nfss->client->cl_xprt->prot) {
630 case IPPROTO_TCP:
631 proto = "tcp";
632 break;
633 case IPPROTO_UDP:
634 proto = "udp";
635 break;
636 default:
637 snprintf(buf, sizeof(buf), "%u", nfss->client->cl_xprt->prot);
638 proto = buf;
639 }
640 seq_printf(m, ",proto=%s", proto);
641 seq_printf(m, ",timeo=%lu", 10U * nfss->retrans_timeo / HZ);
642 seq_printf(m, ",retrans=%u", nfss->retrans_count);
643}
644
645static int nfs_show_options(struct seq_file *m, struct vfsmount *mnt)
646{
647 struct nfs_server *nfss = NFS_SB(mnt->mnt_sb);
648
649 nfs_show_mount_options(m, nfss, 0);
650
651 seq_puts(m, ",addr=");
652 seq_escape(m, nfss->hostname, " \t\n\\");
653
654 return 0;
655}
656
657static int nfs_show_stats(struct seq_file *m, struct vfsmount *mnt)
658{
659 int i, cpu;
660 struct nfs_server *nfss = NFS_SB(mnt->mnt_sb);
661 struct rpc_auth *auth = nfss->client->cl_auth;
662 struct nfs_iostats totals = { };
663
664 seq_printf(m, "statvers=%s", NFS_IOSTAT_VERS);
665
666 /*
667 * Display all mount option settings
668 */
669 seq_printf(m, "\n\topts:\t");
670 seq_puts(m, mnt->mnt_sb->s_flags & MS_RDONLY ? "ro" : "rw");
671 seq_puts(m, mnt->mnt_sb->s_flags & MS_SYNCHRONOUS ? ",sync" : "");
672 seq_puts(m, mnt->mnt_sb->s_flags & MS_NOATIME ? ",noatime" : "");
673 seq_puts(m, mnt->mnt_sb->s_flags & MS_NODIRATIME ? ",nodiratime" : "");
674 nfs_show_mount_options(m, nfss, 1);
675
676 seq_printf(m, "\n\tage:\t%lu", (jiffies - nfss->mount_time) / HZ);
677
678 seq_printf(m, "\n\tcaps:\t");
679 seq_printf(m, "caps=0x%x", nfss->caps);
680 seq_printf(m, ",wtmult=%d", nfss->wtmult);
681 seq_printf(m, ",dtsize=%d", nfss->dtsize);
682 seq_printf(m, ",bsize=%d", nfss->bsize);
683 seq_printf(m, ",namelen=%d", nfss->namelen);
684
685#ifdef CONFIG_NFS_V4
686 if (nfss->rpc_ops->version == 4) {
687 seq_printf(m, "\n\tnfsv4:\t");
688 seq_printf(m, "bm0=0x%x", nfss->attr_bitmask[0]);
689 seq_printf(m, ",bm1=0x%x", nfss->attr_bitmask[1]);
690 seq_printf(m, ",acl=0x%x", nfss->acl_bitmask);
691 }
692#endif
693
694 /*
695 * Display security flavor in effect for this mount
696 */
697 seq_printf(m, "\n\tsec:\tflavor=%d", auth->au_ops->au_flavor);
698 if (auth->au_flavor)
699 seq_printf(m, ",pseudoflavor=%d", auth->au_flavor);
700
701 /*
702 * Display superblock I/O counters
703 */
704 for_each_possible_cpu(cpu) {
705 struct nfs_iostats *stats;
706
707 preempt_disable();
708 stats = per_cpu_ptr(nfss->io_stats, cpu);
709
710 for (i = 0; i < __NFSIOS_COUNTSMAX; i++)
711 totals.events[i] += stats->events[i];
712 for (i = 0; i < __NFSIOS_BYTESMAX; i++)
713 totals.bytes[i] += stats->bytes[i];
714
715 preempt_enable();
716 }
717
718 seq_printf(m, "\n\tevents:\t");
719 for (i = 0; i < __NFSIOS_COUNTSMAX; i++)
720 seq_printf(m, "%lu ", totals.events[i]);
721 seq_printf(m, "\n\tbytes:\t");
722 for (i = 0; i < __NFSIOS_BYTESMAX; i++)
723 seq_printf(m, "%Lu ", totals.bytes[i]);
724 seq_printf(m, "\n");
725
726 rpc_print_iostats(m, nfss->client);
727
728 return 0;
729}
730
731/** 95/**
732 * nfs_sync_mapping - helper to flush all mmapped dirty data to disk 96 * nfs_sync_mapping - helper to flush all mmapped dirty data to disk
733 */ 97 */
@@ -890,6 +254,14 @@ nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr)
890 if (nfs_server_capable(inode, NFS_CAP_READDIRPLUS) 254 if (nfs_server_capable(inode, NFS_CAP_READDIRPLUS)
891 && fattr->size <= NFS_LIMIT_READDIRPLUS) 255 && fattr->size <= NFS_LIMIT_READDIRPLUS)
892 set_bit(NFS_INO_ADVISE_RDPLUS, &NFS_FLAGS(inode)); 256 set_bit(NFS_INO_ADVISE_RDPLUS, &NFS_FLAGS(inode));
257 /* Deal with crossing mountpoints */
258 if (!nfs_fsid_equal(&NFS_SB(sb)->fsid, &fattr->fsid)) {
259 if (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)
260 inode->i_op = &nfs_referral_inode_operations;
261 else
262 inode->i_op = &nfs_mountpoint_inode_operations;
263 inode->i_fop = NULL;
264 }
893 } else if (S_ISLNK(inode->i_mode)) 265 } else if (S_ISLNK(inode->i_mode))
894 inode->i_op = &nfs_symlink_inode_operations; 266 inode->i_op = &nfs_symlink_inode_operations;
895 else 267 else
@@ -1208,6 +580,7 @@ __nfs_revalidate_inode(struct nfs_server *server, struct inode *inode)
1208 dfprintk(PAGECACHE, "NFS: revalidating (%s/%Ld)\n", 580 dfprintk(PAGECACHE, "NFS: revalidating (%s/%Ld)\n",
1209 inode->i_sb->s_id, (long long)NFS_FILEID(inode)); 581 inode->i_sb->s_id, (long long)NFS_FILEID(inode));
1210 582
583 nfs_inc_stats(inode, NFSIOS_INODEREVALIDATE);
1211 lock_kernel(); 584 lock_kernel();
1212 if (!inode || is_bad_inode(inode)) 585 if (!inode || is_bad_inode(inode))
1213 goto out_nowait; 586 goto out_nowait;
@@ -1221,7 +594,7 @@ __nfs_revalidate_inode(struct nfs_server *server, struct inode *inode)
1221 status = -ESTALE; 594 status = -ESTALE;
1222 /* Do we trust the cached ESTALE? */ 595 /* Do we trust the cached ESTALE? */
1223 if (NFS_ATTRTIMEO(inode) != 0) { 596 if (NFS_ATTRTIMEO(inode) != 0) {
1224 if (nfsi->cache_validity & (NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ATIME)) { 597 if (nfsi->cache_validity & (NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ATIME)) {
1225 /* no */ 598 /* no */
1226 } else 599 } else
1227 goto out; 600 goto out;
@@ -1252,8 +625,6 @@ __nfs_revalidate_inode(struct nfs_server *server, struct inode *inode)
1252 } 625 }
1253 spin_unlock(&inode->i_lock); 626 spin_unlock(&inode->i_lock);
1254 627
1255 nfs_revalidate_mapping(inode, inode->i_mapping);
1256
1257 if (nfsi->cache_validity & NFS_INO_INVALID_ACL) 628 if (nfsi->cache_validity & NFS_INO_INVALID_ACL)
1258 nfs_zap_acl_cache(inode); 629 nfs_zap_acl_cache(inode);
1259 630
@@ -1287,8 +658,7 @@ int nfs_attribute_timeout(struct inode *inode)
1287 */ 658 */
1288int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) 659int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode)
1289{ 660{
1290 nfs_inc_stats(inode, NFSIOS_INODEREVALIDATE); 661 if (!(NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATTR)
1291 if (!(NFS_I(inode)->cache_validity & (NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA))
1292 && !nfs_attribute_timeout(inode)) 662 && !nfs_attribute_timeout(inode))
1293 return NFS_STALE(inode) ? -ESTALE : 0; 663 return NFS_STALE(inode) ? -ESTALE : 0;
1294 return __nfs_revalidate_inode(server, inode); 664 return __nfs_revalidate_inode(server, inode);
@@ -1299,9 +669,16 @@ int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode)
1299 * @inode - pointer to host inode 669 * @inode - pointer to host inode
1300 * @mapping - pointer to mapping 670 * @mapping - pointer to mapping
1301 */ 671 */
1302void nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping) 672int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping)
1303{ 673{
1304 struct nfs_inode *nfsi = NFS_I(inode); 674 struct nfs_inode *nfsi = NFS_I(inode);
675 int ret = 0;
676
677 if (NFS_STALE(inode))
678 ret = -ESTALE;
679 if ((nfsi->cache_validity & NFS_INO_REVAL_PAGECACHE)
680 || nfs_attribute_timeout(inode))
681 ret = __nfs_revalidate_inode(NFS_SERVER(inode), inode);
1305 682
1306 if (nfsi->cache_validity & NFS_INO_INVALID_DATA) { 683 if (nfsi->cache_validity & NFS_INO_INVALID_DATA) {
1307 nfs_inc_stats(inode, NFSIOS_DATAINVALIDATE); 684 nfs_inc_stats(inode, NFSIOS_DATAINVALIDATE);
@@ -1322,6 +699,7 @@ void nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping)
1322 inode->i_sb->s_id, 699 inode->i_sb->s_id,
1323 (long long)NFS_FILEID(inode)); 700 (long long)NFS_FILEID(inode));
1324 } 701 }
702 return ret;
1325} 703}
1326 704
1327/** 705/**
@@ -1361,12 +739,6 @@ static void nfs_wcc_update_inode(struct inode *inode, struct nfs_fattr *fattr)
1361{ 739{
1362 struct nfs_inode *nfsi = NFS_I(inode); 740 struct nfs_inode *nfsi = NFS_I(inode);
1363 741
1364 if ((fattr->valid & NFS_ATTR_PRE_CHANGE) != 0
1365 && nfsi->change_attr == fattr->pre_change_attr) {
1366 nfsi->change_attr = fattr->change_attr;
1367 nfsi->cache_change_attribute = jiffies;
1368 }
1369
1370 /* If we have atomic WCC data, we may update some attributes */ 742 /* If we have atomic WCC data, we may update some attributes */
1371 if ((fattr->valid & NFS_ATTR_WCC) != 0) { 743 if ((fattr->valid & NFS_ATTR_WCC) != 0) {
1372 if (timespec_equal(&inode->i_ctime, &fattr->pre_ctime)) { 744 if (timespec_equal(&inode->i_ctime, &fattr->pre_ctime)) {
@@ -1400,9 +772,6 @@ static int nfs_check_inode_attributes(struct inode *inode, struct nfs_fattr *fat
1400 int data_unstable; 772 int data_unstable;
1401 773
1402 774
1403 if ((fattr->valid & NFS_ATTR_FATTR) == 0)
1404 return 0;
1405
1406 /* Has the inode gone and changed behind our back? */ 775 /* Has the inode gone and changed behind our back? */
1407 if (nfsi->fileid != fattr->fileid 776 if (nfsi->fileid != fattr->fileid
1408 || (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) { 777 || (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) {
@@ -1415,20 +784,13 @@ static int nfs_check_inode_attributes(struct inode *inode, struct nfs_fattr *fat
1415 /* Do atomic weak cache consistency updates */ 784 /* Do atomic weak cache consistency updates */
1416 nfs_wcc_update_inode(inode, fattr); 785 nfs_wcc_update_inode(inode, fattr);
1417 786
1418 if ((fattr->valid & NFS_ATTR_FATTR_V4) != 0) { 787 if ((fattr->valid & NFS_ATTR_FATTR_V4) != 0 &&
1419 if (nfsi->change_attr == fattr->change_attr) 788 nfsi->change_attr != fattr->change_attr)
1420 goto out; 789 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE;
1421 nfsi->cache_validity |= NFS_INO_INVALID_ATTR;
1422 if (!data_unstable)
1423 nfsi->cache_validity |= NFS_INO_REVAL_PAGECACHE;
1424 }
1425 790
1426 /* Verify a few of the more important attributes */ 791 /* Verify a few of the more important attributes */
1427 if (!timespec_equal(&inode->i_mtime, &fattr->mtime)) { 792 if (!timespec_equal(&inode->i_mtime, &fattr->mtime))
1428 nfsi->cache_validity |= NFS_INO_INVALID_ATTR; 793 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE;
1429 if (!data_unstable)
1430 nfsi->cache_validity |= NFS_INO_REVAL_PAGECACHE;
1431 }
1432 794
1433 cur_size = i_size_read(inode); 795 cur_size = i_size_read(inode);
1434 new_isize = nfs_size_to_loff_t(fattr->size); 796 new_isize = nfs_size_to_loff_t(fattr->size);
@@ -1445,7 +807,6 @@ static int nfs_check_inode_attributes(struct inode *inode, struct nfs_fattr *fat
1445 if (inode->i_nlink != fattr->nlink) 807 if (inode->i_nlink != fattr->nlink)
1446 nfsi->cache_validity |= NFS_INO_INVALID_ATTR; 808 nfsi->cache_validity |= NFS_INO_INVALID_ATTR;
1447 809
1448out:
1449 if (!timespec_equal(&inode->i_atime, &fattr->atime)) 810 if (!timespec_equal(&inode->i_atime, &fattr->atime))
1450 nfsi->cache_validity |= NFS_INO_INVALID_ATIME; 811 nfsi->cache_validity |= NFS_INO_INVALID_ATIME;
1451 812
@@ -1471,7 +832,6 @@ int nfs_refresh_inode(struct inode *inode, struct nfs_fattr *fattr)
1471 if ((fattr->valid & NFS_ATTR_FATTR) == 0) 832 if ((fattr->valid & NFS_ATTR_FATTR) == 0)
1472 return 0; 833 return 0;
1473 spin_lock(&inode->i_lock); 834 spin_lock(&inode->i_lock);
1474 nfsi->cache_validity &= ~NFS_INO_REVAL_PAGECACHE;
1475 if (time_after(fattr->time_start, nfsi->last_updated)) 835 if (time_after(fattr->time_start, nfsi->last_updated))
1476 status = nfs_update_inode(inode, fattr); 836 status = nfs_update_inode(inode, fattr);
1477 else 837 else
@@ -1496,7 +856,7 @@ int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr)
1496 856
1497 spin_lock(&inode->i_lock); 857 spin_lock(&inode->i_lock);
1498 if (unlikely((fattr->valid & NFS_ATTR_FATTR) == 0)) { 858 if (unlikely((fattr->valid & NFS_ATTR_FATTR) == 0)) {
1499 nfsi->cache_validity |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS; 859 nfsi->cache_validity |= NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE;
1500 goto out; 860 goto out;
1501 } 861 }
1502 status = nfs_update_inode(inode, fattr); 862 status = nfs_update_inode(inode, fattr);
@@ -1519,6 +879,7 @@ out:
1519 */ 879 */
1520static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr) 880static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr)
1521{ 881{
882 struct nfs_server *server;
1522 struct nfs_inode *nfsi = NFS_I(inode); 883 struct nfs_inode *nfsi = NFS_I(inode);
1523 loff_t cur_isize, new_isize; 884 loff_t cur_isize, new_isize;
1524 unsigned int invalid = 0; 885 unsigned int invalid = 0;
@@ -1528,9 +889,6 @@ static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr)
1528 __FUNCTION__, inode->i_sb->s_id, inode->i_ino, 889 __FUNCTION__, inode->i_sb->s_id, inode->i_ino,
1529 atomic_read(&inode->i_count), fattr->valid); 890 atomic_read(&inode->i_count), fattr->valid);
1530 891
1531 if ((fattr->valid & NFS_ATTR_FATTR) == 0)
1532 return 0;
1533
1534 if (nfsi->fileid != fattr->fileid) 892 if (nfsi->fileid != fattr->fileid)
1535 goto out_fileid; 893 goto out_fileid;
1536 894
@@ -1540,6 +898,12 @@ static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr)
1540 if ((inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) 898 if ((inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT))
1541 goto out_changed; 899 goto out_changed;
1542 900
901 server = NFS_SERVER(inode);
902 /* Update the fsid if and only if this is the root directory */
903 if (inode == inode->i_sb->s_root->d_inode
904 && !nfs_fsid_equal(&server->fsid, &fattr->fsid))
905 server->fsid = fattr->fsid;
906
1543 /* 907 /*
1544 * Update the read time so we don't revalidate too often. 908 * Update the read time so we don't revalidate too often.
1545 */ 909 */
@@ -1549,7 +913,7 @@ static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr)
1549 /* Are we racing with known updates of the metadata on the server? */ 913 /* Are we racing with known updates of the metadata on the server? */
1550 data_stable = nfs_verify_change_attribute(inode, fattr->time_start); 914 data_stable = nfs_verify_change_attribute(inode, fattr->time_start);
1551 if (data_stable) 915 if (data_stable)
1552 nfsi->cache_validity &= ~(NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ATIME); 916 nfsi->cache_validity &= ~(NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_ATIME);
1553 917
1554 /* Do atomic weak cache consistency updates */ 918 /* Do atomic weak cache consistency updates */
1555 nfs_wcc_update_inode(inode, fattr); 919 nfs_wcc_update_inode(inode, fattr);
@@ -1613,15 +977,13 @@ static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr)
1613 inode->i_blksize = fattr->du.nfs2.blocksize; 977 inode->i_blksize = fattr->du.nfs2.blocksize;
1614 } 978 }
1615 979
1616 if ((fattr->valid & NFS_ATTR_FATTR_V4)) { 980 if ((fattr->valid & NFS_ATTR_FATTR_V4) != 0 &&
1617 if (nfsi->change_attr != fattr->change_attr) { 981 nfsi->change_attr != fattr->change_attr) {
1618 dprintk("NFS: change_attr change on server for file %s/%ld\n", 982 dprintk("NFS: change_attr change on server for file %s/%ld\n",
1619 inode->i_sb->s_id, inode->i_ino); 983 inode->i_sb->s_id, inode->i_ino);
1620 nfsi->change_attr = fattr->change_attr; 984 nfsi->change_attr = fattr->change_attr;
1621 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; 985 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
1622 nfsi->cache_change_attribute = jiffies; 986 nfsi->cache_change_attribute = jiffies;
1623 } else
1624 invalid &= ~(NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA);
1625 } 987 }
1626 988
1627 /* Update attrtimeo value if we're out of the unstable period */ 989 /* Update attrtimeo value if we're out of the unstable period */
@@ -1669,202 +1031,15 @@ static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr)
1669 goto out_err; 1031 goto out_err;
1670} 1032}
1671 1033
1672/*
1673 * File system information
1674 */
1675
1676static int nfs_set_super(struct super_block *s, void *data)
1677{
1678 s->s_fs_info = data;
1679 return set_anon_super(s, data);
1680}
1681
1682static int nfs_compare_super(struct super_block *sb, void *data)
1683{
1684 struct nfs_server *server = data;
1685 struct nfs_server *old = NFS_SB(sb);
1686
1687 if (old->addr.sin_addr.s_addr != server->addr.sin_addr.s_addr)
1688 return 0;
1689 if (old->addr.sin_port != server->addr.sin_port)
1690 return 0;
1691 return !nfs_compare_fh(&old->fh, &server->fh);
1692}
1693
1694static int nfs_get_sb(struct file_system_type *fs_type,
1695 int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt)
1696{
1697 int error;
1698 struct nfs_server *server = NULL;
1699 struct super_block *s;
1700 struct nfs_fh *root;
1701 struct nfs_mount_data *data = raw_data;
1702
1703 error = -EINVAL;
1704 if (data == NULL) {
1705 dprintk("%s: missing data argument\n", __FUNCTION__);
1706 goto out_err_noserver;
1707 }
1708 if (data->version <= 0 || data->version > NFS_MOUNT_VERSION) {
1709 dprintk("%s: bad mount version\n", __FUNCTION__);
1710 goto out_err_noserver;
1711 }
1712 switch (data->version) {
1713 case 1:
1714 data->namlen = 0;
1715 case 2:
1716 data->bsize = 0;
1717 case 3:
1718 if (data->flags & NFS_MOUNT_VER3) {
1719 dprintk("%s: mount structure version %d does not support NFSv3\n",
1720 __FUNCTION__,
1721 data->version);
1722 goto out_err_noserver;
1723 }
1724 data->root.size = NFS2_FHSIZE;
1725 memcpy(data->root.data, data->old_root.data, NFS2_FHSIZE);
1726 case 4:
1727 if (data->flags & NFS_MOUNT_SECFLAVOUR) {
1728 dprintk("%s: mount structure version %d does not support strong security\n",
1729 __FUNCTION__,
1730 data->version);
1731 goto out_err_noserver;
1732 }
1733 case 5:
1734 memset(data->context, 0, sizeof(data->context));
1735 }
1736#ifndef CONFIG_NFS_V3
1737 /* If NFSv3 is not compiled in, return -EPROTONOSUPPORT */
1738 error = -EPROTONOSUPPORT;
1739 if (data->flags & NFS_MOUNT_VER3) {
1740 dprintk("%s: NFSv3 not compiled into kernel\n", __FUNCTION__);
1741 goto out_err_noserver;
1742 }
1743#endif /* CONFIG_NFS_V3 */
1744
1745 error = -ENOMEM;
1746 server = kzalloc(sizeof(struct nfs_server), GFP_KERNEL);
1747 if (!server)
1748 goto out_err_noserver;
1749 /* Zero out the NFS state stuff */
1750 init_nfsv4_state(server);
1751 server->client = server->client_sys = server->client_acl = ERR_PTR(-EINVAL);
1752
1753 root = &server->fh;
1754 if (data->flags & NFS_MOUNT_VER3)
1755 root->size = data->root.size;
1756 else
1757 root->size = NFS2_FHSIZE;
1758 error = -EINVAL;
1759 if (root->size > sizeof(root->data)) {
1760 dprintk("%s: invalid root filehandle\n", __FUNCTION__);
1761 goto out_err;
1762 }
1763 memcpy(root->data, data->root.data, root->size);
1764
1765 /* We now require that the mount process passes the remote address */
1766 memcpy(&server->addr, &data->addr, sizeof(server->addr));
1767 if (server->addr.sin_addr.s_addr == INADDR_ANY) {
1768 dprintk("%s: mount program didn't pass remote address!\n",
1769 __FUNCTION__);
1770 goto out_err;
1771 }
1772
1773 /* Fire up rpciod if not yet running */
1774 error = rpciod_up();
1775 if (error < 0) {
1776 dprintk("%s: couldn't start rpciod! Error = %d\n",
1777 __FUNCTION__, error);
1778 goto out_err;
1779 }
1780
1781 s = sget(fs_type, nfs_compare_super, nfs_set_super, server);
1782 if (IS_ERR(s)) {
1783 error = PTR_ERR(s);
1784 goto out_err_rpciod;
1785 }
1786
1787 if (s->s_root)
1788 goto out_rpciod_down;
1789
1790 s->s_flags = flags;
1791
1792 error = nfs_fill_super(s, data, flags & MS_SILENT ? 1 : 0);
1793 if (error) {
1794 up_write(&s->s_umount);
1795 deactivate_super(s);
1796 return error;
1797 }
1798 s->s_flags |= MS_ACTIVE;
1799 return simple_set_mnt(mnt, s);
1800
1801out_rpciod_down:
1802 rpciod_down();
1803 kfree(server);
1804 return simple_set_mnt(mnt, s);
1805
1806out_err_rpciod:
1807 rpciod_down();
1808out_err:
1809 kfree(server);
1810out_err_noserver:
1811 return error;
1812}
1813
1814static void nfs_kill_super(struct super_block *s)
1815{
1816 struct nfs_server *server = NFS_SB(s);
1817
1818 kill_anon_super(s);
1819
1820 if (!IS_ERR(server->client))
1821 rpc_shutdown_client(server->client);
1822 if (!IS_ERR(server->client_sys))
1823 rpc_shutdown_client(server->client_sys);
1824 if (!IS_ERR(server->client_acl))
1825 rpc_shutdown_client(server->client_acl);
1826
1827 if (!(server->flags & NFS_MOUNT_NONLM))
1828 lockd_down(); /* release rpc.lockd */
1829
1830 rpciod_down(); /* release rpciod */
1831
1832 nfs_free_iostats(server->io_stats);
1833 kfree(server->hostname);
1834 kfree(server);
1835}
1836
1837static struct file_system_type nfs_fs_type = {
1838 .owner = THIS_MODULE,
1839 .name = "nfs",
1840 .get_sb = nfs_get_sb,
1841 .kill_sb = nfs_kill_super,
1842 .fs_flags = FS_ODD_RENAME|FS_REVAL_DOT|FS_BINARY_MOUNTDATA,
1843};
1844 1034
1845#ifdef CONFIG_NFS_V4 1035#ifdef CONFIG_NFS_V4
1846 1036
1847static void nfs4_clear_inode(struct inode *);
1848
1849
1850static struct super_operations nfs4_sops = {
1851 .alloc_inode = nfs_alloc_inode,
1852 .destroy_inode = nfs_destroy_inode,
1853 .write_inode = nfs_write_inode,
1854 .delete_inode = nfs_delete_inode,
1855 .statfs = nfs_statfs,
1856 .clear_inode = nfs4_clear_inode,
1857 .umount_begin = nfs_umount_begin,
1858 .show_options = nfs_show_options,
1859 .show_stats = nfs_show_stats,
1860};
1861
1862/* 1037/*
1863 * Clean out any remaining NFSv4 state that might be left over due 1038 * Clean out any remaining NFSv4 state that might be left over due
1864 * to open() calls that passed nfs_atomic_lookup, but failed to call 1039 * to open() calls that passed nfs_atomic_lookup, but failed to call
1865 * nfs_open(). 1040 * nfs_open().
1866 */ 1041 */
1867static void nfs4_clear_inode(struct inode *inode) 1042void nfs4_clear_inode(struct inode *inode)
1868{ 1043{
1869 struct nfs_inode *nfsi = NFS_I(inode); 1044 struct nfs_inode *nfsi = NFS_I(inode);
1870 1045
@@ -1888,365 +1063,9 @@ static void nfs4_clear_inode(struct inode *inode)
1888 nfs4_close_state(state, state->state); 1063 nfs4_close_state(state, state->state);
1889 } 1064 }
1890} 1065}
1891
1892
1893static int nfs4_fill_super(struct super_block *sb, struct nfs4_mount_data *data, int silent)
1894{
1895 struct nfs_server *server;
1896 struct nfs4_client *clp = NULL;
1897 struct rpc_xprt *xprt = NULL;
1898 struct rpc_clnt *clnt = NULL;
1899 struct rpc_timeout timeparms;
1900 rpc_authflavor_t authflavour;
1901 int err = -EIO;
1902
1903 sb->s_blocksize_bits = 0;
1904 sb->s_blocksize = 0;
1905 server = NFS_SB(sb);
1906 if (data->rsize != 0)
1907 server->rsize = nfs_block_size(data->rsize, NULL);
1908 if (data->wsize != 0)
1909 server->wsize = nfs_block_size(data->wsize, NULL);
1910 server->flags = data->flags & NFS_MOUNT_FLAGMASK;
1911 server->caps = NFS_CAP_ATOMIC_OPEN;
1912
1913 server->acregmin = data->acregmin*HZ;
1914 server->acregmax = data->acregmax*HZ;
1915 server->acdirmin = data->acdirmin*HZ;
1916 server->acdirmax = data->acdirmax*HZ;
1917
1918 server->rpc_ops = &nfs_v4_clientops;
1919
1920 nfs_init_timeout_values(&timeparms, data->proto, data->timeo, data->retrans);
1921
1922 server->retrans_timeo = timeparms.to_initval;
1923 server->retrans_count = timeparms.to_retries;
1924
1925 clp = nfs4_get_client(&server->addr.sin_addr);
1926 if (!clp) {
1927 dprintk("%s: failed to create NFS4 client.\n", __FUNCTION__);
1928 return -EIO;
1929 }
1930
1931 /* Now create transport and client */
1932 authflavour = RPC_AUTH_UNIX;
1933 if (data->auth_flavourlen != 0) {
1934 if (data->auth_flavourlen != 1) {
1935 dprintk("%s: Invalid number of RPC auth flavours %d.\n",
1936 __FUNCTION__, data->auth_flavourlen);
1937 err = -EINVAL;
1938 goto out_fail;
1939 }
1940 if (copy_from_user(&authflavour, data->auth_flavours, sizeof(authflavour))) {
1941 err = -EFAULT;
1942 goto out_fail;
1943 }
1944 }
1945
1946 down_write(&clp->cl_sem);
1947 if (IS_ERR(clp->cl_rpcclient)) {
1948 xprt = xprt_create_proto(data->proto, &server->addr, &timeparms);
1949 if (IS_ERR(xprt)) {
1950 up_write(&clp->cl_sem);
1951 err = PTR_ERR(xprt);
1952 dprintk("%s: cannot create RPC transport. Error = %d\n",
1953 __FUNCTION__, err);
1954 goto out_fail;
1955 }
1956 clnt = rpc_create_client(xprt, server->hostname, &nfs_program,
1957 server->rpc_ops->version, authflavour);
1958 if (IS_ERR(clnt)) {
1959 up_write(&clp->cl_sem);
1960 err = PTR_ERR(clnt);
1961 dprintk("%s: cannot create RPC client. Error = %d\n",
1962 __FUNCTION__, err);
1963 goto out_fail;
1964 }
1965 clnt->cl_intr = 1;
1966 clnt->cl_softrtry = 1;
1967 clp->cl_rpcclient = clnt;
1968 memcpy(clp->cl_ipaddr, server->ip_addr, sizeof(clp->cl_ipaddr));
1969 nfs_idmap_new(clp);
1970 }
1971 list_add_tail(&server->nfs4_siblings, &clp->cl_superblocks);
1972 clnt = rpc_clone_client(clp->cl_rpcclient);
1973 if (!IS_ERR(clnt))
1974 server->nfs4_state = clp;
1975 up_write(&clp->cl_sem);
1976 clp = NULL;
1977
1978 if (IS_ERR(clnt)) {
1979 err = PTR_ERR(clnt);
1980 dprintk("%s: cannot create RPC client. Error = %d\n",
1981 __FUNCTION__, err);
1982 return err;
1983 }
1984
1985 server->client = clnt;
1986
1987 if (server->nfs4_state->cl_idmap == NULL) {
1988 dprintk("%s: failed to create idmapper.\n", __FUNCTION__);
1989 return -ENOMEM;
1990 }
1991
1992 if (clnt->cl_auth->au_flavor != authflavour) {
1993 struct rpc_auth *auth;
1994
1995 auth = rpcauth_create(authflavour, clnt);
1996 if (IS_ERR(auth)) {
1997 dprintk("%s: couldn't create credcache!\n", __FUNCTION__);
1998 return PTR_ERR(auth);
1999 }
2000 }
2001
2002 sb->s_time_gran = 1;
2003
2004 sb->s_op = &nfs4_sops;
2005 err = nfs_sb_init(sb, authflavour);
2006 if (err == 0)
2007 return 0;
2008out_fail:
2009 if (clp)
2010 nfs4_put_client(clp);
2011 return err;
2012}
2013
2014static int nfs4_compare_super(struct super_block *sb, void *data)
2015{
2016 struct nfs_server *server = data;
2017 struct nfs_server *old = NFS_SB(sb);
2018
2019 if (strcmp(server->hostname, old->hostname) != 0)
2020 return 0;
2021 if (strcmp(server->mnt_path, old->mnt_path) != 0)
2022 return 0;
2023 return 1;
2024}
2025
2026static void *
2027nfs_copy_user_string(char *dst, struct nfs_string *src, int maxlen)
2028{
2029 void *p = NULL;
2030
2031 if (!src->len)
2032 return ERR_PTR(-EINVAL);
2033 if (src->len < maxlen)
2034 maxlen = src->len;
2035 if (dst == NULL) {
2036 p = dst = kmalloc(maxlen + 1, GFP_KERNEL);
2037 if (p == NULL)
2038 return ERR_PTR(-ENOMEM);
2039 }
2040 if (copy_from_user(dst, src->data, maxlen)) {
2041 kfree(p);
2042 return ERR_PTR(-EFAULT);
2043 }
2044 dst[maxlen] = '\0';
2045 return dst;
2046}
2047
2048static int nfs4_get_sb(struct file_system_type *fs_type,
2049 int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt)
2050{
2051 int error;
2052 struct nfs_server *server;
2053 struct super_block *s;
2054 struct nfs4_mount_data *data = raw_data;
2055 void *p;
2056
2057 if (data == NULL) {
2058 dprintk("%s: missing data argument\n", __FUNCTION__);
2059 return -EINVAL;
2060 }
2061 if (data->version <= 0 || data->version > NFS4_MOUNT_VERSION) {
2062 dprintk("%s: bad mount version\n", __FUNCTION__);
2063 return -EINVAL;
2064 }
2065
2066 server = kzalloc(sizeof(struct nfs_server), GFP_KERNEL);
2067 if (!server)
2068 return -ENOMEM;
2069 /* Zero out the NFS state stuff */
2070 init_nfsv4_state(server);
2071 server->client = server->client_sys = server->client_acl = ERR_PTR(-EINVAL);
2072
2073 p = nfs_copy_user_string(NULL, &data->hostname, 256);
2074 if (IS_ERR(p))
2075 goto out_err;
2076 server->hostname = p;
2077
2078 p = nfs_copy_user_string(NULL, &data->mnt_path, 1024);
2079 if (IS_ERR(p))
2080 goto out_err;
2081 server->mnt_path = p;
2082
2083 p = nfs_copy_user_string(server->ip_addr, &data->client_addr,
2084 sizeof(server->ip_addr) - 1);
2085 if (IS_ERR(p))
2086 goto out_err;
2087
2088 /* We now require that the mount process passes the remote address */
2089 if (data->host_addrlen != sizeof(server->addr)) {
2090 error = -EINVAL;
2091 goto out_free;
2092 }
2093 if (copy_from_user(&server->addr, data->host_addr, sizeof(server->addr))) {
2094 error = -EFAULT;
2095 goto out_free;
2096 }
2097 if (server->addr.sin_family != AF_INET ||
2098 server->addr.sin_addr.s_addr == INADDR_ANY) {
2099 dprintk("%s: mount program didn't pass remote IP address!\n",
2100 __FUNCTION__);
2101 error = -EINVAL;
2102 goto out_free;
2103 }
2104
2105 /* Fire up rpciod if not yet running */
2106 error = rpciod_up();
2107 if (error < 0) {
2108 dprintk("%s: couldn't start rpciod! Error = %d\n",
2109 __FUNCTION__, error);
2110 goto out_free;
2111 }
2112
2113 s = sget(fs_type, nfs4_compare_super, nfs_set_super, server);
2114 if (IS_ERR(s)) {
2115 error = PTR_ERR(s);
2116 goto out_free;
2117 }
2118
2119 if (s->s_root) {
2120 kfree(server->mnt_path);
2121 kfree(server->hostname);
2122 kfree(server);
2123 return simple_set_mnt(mnt, s);
2124 }
2125
2126 s->s_flags = flags;
2127
2128 error = nfs4_fill_super(s, data, flags & MS_SILENT ? 1 : 0);
2129 if (error) {
2130 up_write(&s->s_umount);
2131 deactivate_super(s);
2132 return error;
2133 }
2134 s->s_flags |= MS_ACTIVE;
2135 return simple_set_mnt(mnt, s);
2136out_err:
2137 error = PTR_ERR(p);
2138out_free:
2139 kfree(server->mnt_path);
2140 kfree(server->hostname);
2141 kfree(server);
2142 return error;
2143}
2144
2145static void nfs4_kill_super(struct super_block *sb)
2146{
2147 struct nfs_server *server = NFS_SB(sb);
2148
2149 nfs_return_all_delegations(sb);
2150 kill_anon_super(sb);
2151
2152 nfs4_renewd_prepare_shutdown(server);
2153
2154 if (server->client != NULL && !IS_ERR(server->client))
2155 rpc_shutdown_client(server->client);
2156
2157 destroy_nfsv4_state(server);
2158
2159 rpciod_down();
2160
2161 nfs_free_iostats(server->io_stats);
2162 kfree(server->hostname);
2163 kfree(server);
2164}
2165
2166static struct file_system_type nfs4_fs_type = {
2167 .owner = THIS_MODULE,
2168 .name = "nfs4",
2169 .get_sb = nfs4_get_sb,
2170 .kill_sb = nfs4_kill_super,
2171 .fs_flags = FS_ODD_RENAME|FS_REVAL_DOT|FS_BINARY_MOUNTDATA,
2172};
2173
2174static const int nfs_set_port_min = 0;
2175static const int nfs_set_port_max = 65535;
2176static int param_set_port(const char *val, struct kernel_param *kp)
2177{
2178 char *endp;
2179 int num = simple_strtol(val, &endp, 0);
2180 if (endp == val || *endp || num < nfs_set_port_min || num > nfs_set_port_max)
2181 return -EINVAL;
2182 *((int *)kp->arg) = num;
2183 return 0;
2184}
2185
2186module_param_call(callback_tcpport, param_set_port, param_get_int,
2187 &nfs_callback_set_tcpport, 0644);
2188
2189static int param_set_idmap_timeout(const char *val, struct kernel_param *kp)
2190{
2191 char *endp;
2192 int num = simple_strtol(val, &endp, 0);
2193 int jif = num * HZ;
2194 if (endp == val || *endp || num < 0 || jif < num)
2195 return -EINVAL;
2196 *((int *)kp->arg) = jif;
2197 return 0;
2198}
2199
2200module_param_call(idmap_cache_timeout, param_set_idmap_timeout, param_get_int,
2201 &nfs_idmap_cache_timeout, 0644);
2202
2203#define nfs4_init_once(nfsi) \
2204 do { \
2205 INIT_LIST_HEAD(&(nfsi)->open_states); \
2206 nfsi->delegation = NULL; \
2207 nfsi->delegation_state = 0; \
2208 init_rwsem(&nfsi->rwsem); \
2209 } while(0)
2210
2211static inline int register_nfs4fs(void)
2212{
2213 int ret;
2214
2215 ret = nfs_register_sysctl();
2216 if (ret != 0)
2217 return ret;
2218 ret = register_filesystem(&nfs4_fs_type);
2219 if (ret != 0)
2220 nfs_unregister_sysctl();
2221 return ret;
2222}
2223
2224static inline void unregister_nfs4fs(void)
2225{
2226 unregister_filesystem(&nfs4_fs_type);
2227 nfs_unregister_sysctl();
2228}
2229#else
2230#define nfs4_init_once(nfsi) \
2231 do { } while (0)
2232#define register_nfs4fs() (0)
2233#define unregister_nfs4fs()
2234#endif 1066#endif
2235 1067
2236extern int nfs_init_nfspagecache(void); 1068struct inode *nfs_alloc_inode(struct super_block *sb)
2237extern void nfs_destroy_nfspagecache(void);
2238extern int nfs_init_readpagecache(void);
2239extern void nfs_destroy_readpagecache(void);
2240extern int nfs_init_writepagecache(void);
2241extern void nfs_destroy_writepagecache(void);
2242#ifdef CONFIG_NFS_DIRECTIO
2243extern int nfs_init_directcache(void);
2244extern void nfs_destroy_directcache(void);
2245#endif
2246
2247static kmem_cache_t * nfs_inode_cachep;
2248
2249static struct inode *nfs_alloc_inode(struct super_block *sb)
2250{ 1069{
2251 struct nfs_inode *nfsi; 1070 struct nfs_inode *nfsi;
2252 nfsi = (struct nfs_inode *)kmem_cache_alloc(nfs_inode_cachep, SLAB_KERNEL); 1071 nfsi = (struct nfs_inode *)kmem_cache_alloc(nfs_inode_cachep, SLAB_KERNEL);
@@ -2265,11 +1084,21 @@ static struct inode *nfs_alloc_inode(struct super_block *sb)
2265 return &nfsi->vfs_inode; 1084 return &nfsi->vfs_inode;
2266} 1085}
2267 1086
2268static void nfs_destroy_inode(struct inode *inode) 1087void nfs_destroy_inode(struct inode *inode)
2269{ 1088{
2270 kmem_cache_free(nfs_inode_cachep, NFS_I(inode)); 1089 kmem_cache_free(nfs_inode_cachep, NFS_I(inode));
2271} 1090}
2272 1091
1092static inline void nfs4_init_once(struct nfs_inode *nfsi)
1093{
1094#ifdef CONFIG_NFS_V4
1095 INIT_LIST_HEAD(&nfsi->open_states);
1096 nfsi->delegation = NULL;
1097 nfsi->delegation_state = 0;
1098 init_rwsem(&nfsi->rwsem);
1099#endif
1100}
1101
2273static void init_once(void * foo, kmem_cache_t * cachep, unsigned long flags) 1102static void init_once(void * foo, kmem_cache_t * cachep, unsigned long flags)
2274{ 1103{
2275 struct nfs_inode *nfsi = (struct nfs_inode *) foo; 1104 struct nfs_inode *nfsi = (struct nfs_inode *) foo;
@@ -2290,7 +1119,7 @@ static void init_once(void * foo, kmem_cache_t * cachep, unsigned long flags)
2290 } 1119 }
2291} 1120}
2292 1121
2293static int nfs_init_inodecache(void) 1122static int __init nfs_init_inodecache(void)
2294{ 1123{
2295 nfs_inode_cachep = kmem_cache_create("nfs_inode_cache", 1124 nfs_inode_cachep = kmem_cache_create("nfs_inode_cache",
2296 sizeof(struct nfs_inode), 1125 sizeof(struct nfs_inode),
@@ -2303,7 +1132,7 @@ static int nfs_init_inodecache(void)
2303 return 0; 1132 return 0;
2304} 1133}
2305 1134
2306static void nfs_destroy_inodecache(void) 1135static void __exit nfs_destroy_inodecache(void)
2307{ 1136{
2308 if (kmem_cache_destroy(nfs_inode_cachep)) 1137 if (kmem_cache_destroy(nfs_inode_cachep))
2309 printk(KERN_INFO "nfs_inode_cache: not all structures were freed\n"); 1138 printk(KERN_INFO "nfs_inode_cache: not all structures were freed\n");
@@ -2332,29 +1161,22 @@ static int __init init_nfs_fs(void)
2332 if (err) 1161 if (err)
2333 goto out1; 1162 goto out1;
2334 1163
2335#ifdef CONFIG_NFS_DIRECTIO
2336 err = nfs_init_directcache(); 1164 err = nfs_init_directcache();
2337 if (err) 1165 if (err)
2338 goto out0; 1166 goto out0;
2339#endif
2340 1167
2341#ifdef CONFIG_PROC_FS 1168#ifdef CONFIG_PROC_FS
2342 rpc_proc_register(&nfs_rpcstat); 1169 rpc_proc_register(&nfs_rpcstat);
2343#endif 1170#endif
2344 err = register_filesystem(&nfs_fs_type); 1171 if ((err = register_nfs_fs()) != 0)
2345 if (err)
2346 goto out;
2347 if ((err = register_nfs4fs()) != 0)
2348 goto out; 1172 goto out;
2349 return 0; 1173 return 0;
2350out: 1174out:
2351#ifdef CONFIG_PROC_FS 1175#ifdef CONFIG_PROC_FS
2352 rpc_proc_unregister("nfs"); 1176 rpc_proc_unregister("nfs");
2353#endif 1177#endif
2354#ifdef CONFIG_NFS_DIRECTIO
2355 nfs_destroy_directcache(); 1178 nfs_destroy_directcache();
2356out0: 1179out0:
2357#endif
2358 nfs_destroy_writepagecache(); 1180 nfs_destroy_writepagecache();
2359out1: 1181out1:
2360 nfs_destroy_readpagecache(); 1182 nfs_destroy_readpagecache();
@@ -2368,9 +1190,7 @@ out4:
2368 1190
2369static void __exit exit_nfs_fs(void) 1191static void __exit exit_nfs_fs(void)
2370{ 1192{
2371#ifdef CONFIG_NFS_DIRECTIO
2372 nfs_destroy_directcache(); 1193 nfs_destroy_directcache();
2373#endif
2374 nfs_destroy_writepagecache(); 1194 nfs_destroy_writepagecache();
2375 nfs_destroy_readpagecache(); 1195 nfs_destroy_readpagecache();
2376 nfs_destroy_inodecache(); 1196 nfs_destroy_inodecache();
@@ -2378,8 +1198,7 @@ static void __exit exit_nfs_fs(void)
2378#ifdef CONFIG_PROC_FS 1198#ifdef CONFIG_PROC_FS
2379 rpc_proc_unregister("nfs"); 1199 rpc_proc_unregister("nfs");
2380#endif 1200#endif
2381 unregister_filesystem(&nfs_fs_type); 1201 unregister_nfs_fs();
2382 unregister_nfs4fs();
2383} 1202}
2384 1203
2385/* Not quite true; I just maintain it */ 1204/* Not quite true; I just maintain it */
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-24 02:11:49 -0500