4 * Copyright (C) 1992 Rick Sladkey
6 * nfs inode and superblock handling functions
8 * Modularised by Alan Cox <Alan.Cox@linux.org>, while hacking some
9 * experimental NFS changes. Modularisation taken straight from SYS5 fs.
11 * Change to nfs_read_super() to permit NFS mounts to multi-homed hosts.
12 * J.S.Peatfield@damtp.cam.ac.uk
16 #include <linux/config.h>
17 #include <linux/module.h>
18 #include <linux/init.h>
20 #include <linux/time.h>
21 #include <linux/kernel.h>
23 #include <linux/string.h>
24 #include <linux/stat.h>
25 #include <linux/errno.h>
26 #include <linux/unistd.h>
27 #include <linux/sunrpc/clnt.h>
28 #include <linux/sunrpc/stats.h>
29 #include <linux/sunrpc/metrics.h>
30 #include <linux/nfs_fs.h>
31 #include <linux/nfs_mount.h>
32 #include <linux/nfs4_mount.h>
33 #include <linux/lockd/bind.h>
34 #include <linux/smp_lock.h>
35 #include <linux/seq_file.h>
36 #include <linux/mount.h>
37 #include <linux/nfs_idmap.h>
38 #include <linux/vfs.h>
40 #include <asm/system.h>
41 #include <asm/uaccess.h>
45 #include "delegation.h"
48 #define NFSDBG_FACILITY NFSDBG_VFS
49 #define NFS_PARANOIA 1
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.
57 #define NFS_MAX_READAHEAD (RPC_DEF_SLOT_TABLE - 1)
59 static void nfs_invalidate_inode(struct inode *);
60 static int nfs_update_inode(struct inode *, struct nfs_fattr *);
62 static struct inode *nfs_alloc_inode(struct super_block *sb);
63 static void nfs_destroy_inode(struct inode *);
64 static int nfs_write_inode(struct inode *,int);
65 static void nfs_clear_inode(struct inode *);
66 static void nfs_umount_begin(struct vfsmount *, int);
67 static int nfs_statfs(struct super_block *, struct kstatfs *);
68 static int nfs_show_options(struct seq_file *, struct vfsmount *);
69 static int nfs_show_stats(struct seq_file *, struct vfsmount *);
70 static void nfs_zap_acl_cache(struct inode *);
72 static struct rpc_program nfs_program;
74 static struct super_operations nfs_sops = {
75 .alloc_inode = nfs_alloc_inode,
76 .destroy_inode = nfs_destroy_inode,
77 .write_inode = nfs_write_inode,
79 .clear_inode = nfs_clear_inode,
80 .umount_begin = nfs_umount_begin,
81 .show_options = nfs_show_options,
82 .show_stats = nfs_show_stats,
88 static struct rpc_stat nfs_rpcstat = {
89 .program = &nfs_program
91 static struct rpc_version * nfs_version[] = {
95 #if defined(CONFIG_NFS_V3)
97 #elif defined(CONFIG_NFS_V4)
100 #if defined(CONFIG_NFS_V4)
105 static struct rpc_program nfs_program = {
107 .number = NFS_PROGRAM,
108 .nrvers = ARRAY_SIZE(nfs_version),
109 .version = nfs_version,
110 .stats = &nfs_rpcstat,
111 .pipe_dir_name = "/nfs",
114 #ifdef CONFIG_NFS_V3_ACL
115 static struct rpc_stat nfsacl_rpcstat = { &nfsacl_program };
116 static struct rpc_version * nfsacl_version[] = {
117 [3] = &nfsacl_version3,
120 struct rpc_program nfsacl_program = {
122 .number = NFS_ACL_PROGRAM,
123 .nrvers = ARRAY_SIZE(nfsacl_version),
124 .version = nfsacl_version,
125 .stats = &nfsacl_rpcstat,
127 #endif /* CONFIG_NFS_V3_ACL */
129 static inline unsigned long
130 nfs_fattr_to_ino_t(struct nfs_fattr *fattr)
132 return nfs_fileid_to_ino_t(fattr->fileid);
136 nfs_write_inode(struct inode *inode, int sync)
138 int flags = sync ? FLUSH_SYNC : 0;
141 ret = nfs_commit_inode(inode, flags);
148 nfs_clear_inode(struct inode *inode)
150 struct nfs_inode *nfsi = NFS_I(inode);
151 struct rpc_cred *cred;
154 * The following should never happen...
156 BUG_ON(nfs_have_writebacks(inode));
157 BUG_ON (!list_empty(&nfsi->open_files));
158 nfs_zap_acl_cache(inode);
159 cred = nfsi->cache_access.cred;
162 BUG_ON(atomic_read(&nfsi->data_updates) != 0);
165 static void nfs_umount_begin(struct vfsmount *vfsmnt, int flags)
167 struct nfs_server *server;
168 struct rpc_clnt *rpc;
170 if (!(flags & MNT_FORCE))
172 /* -EIO all pending I/O */
173 server = NFS_SB(vfsmnt->mnt_sb);
174 rpc = server->client;
176 rpc_killall_tasks(rpc);
177 rpc = server->client_acl;
179 rpc_killall_tasks(rpc);
183 static inline unsigned long
184 nfs_block_bits(unsigned long bsize, unsigned char *nrbitsp)
186 /* make sure blocksize is a power of two */
187 if ((bsize & (bsize - 1)) || nrbitsp) {
188 unsigned char nrbits;
190 for (nrbits = 31; nrbits && !(bsize & (1 << nrbits)); nrbits--)
201 * Calculate the number of 512byte blocks used.
203 static inline unsigned long
204 nfs_calc_block_size(u64 tsize)
206 loff_t used = (tsize + 511) >> 9;
207 return (used > ULONG_MAX) ? ULONG_MAX : used;
211 * Compute and set NFS server blocksize
213 static inline unsigned long
214 nfs_block_size(unsigned long bsize, unsigned char *nrbitsp)
216 if (bsize < NFS_MIN_FILE_IO_SIZE)
217 bsize = NFS_DEF_FILE_IO_SIZE;
218 else if (bsize >= NFS_MAX_FILE_IO_SIZE)
219 bsize = NFS_MAX_FILE_IO_SIZE;
221 return nfs_block_bits(bsize, nrbitsp);
225 * Obtain the root inode of the file system.
227 static struct inode *
228 nfs_get_root(struct super_block *sb, struct nfs_fh *rootfh, struct nfs_fsinfo *fsinfo)
230 struct nfs_server *server = NFS_SB(sb);
233 error = server->rpc_ops->getroot(server, rootfh, fsinfo);
235 dprintk("nfs_get_root: getattr error = %d\n", -error);
236 return ERR_PTR(error);
239 return nfs_fhget(sb, rootfh, fsinfo->fattr);
243 * Do NFS version-independent mount processing, and sanity checking
246 nfs_sb_init(struct super_block *sb, rpc_authflavor_t authflavor)
248 struct nfs_server *server;
249 struct inode *root_inode;
250 struct nfs_fattr fattr;
251 struct nfs_fsinfo fsinfo = {
254 struct nfs_pathconf pathinfo = {
257 int no_root_error = 0;
258 unsigned long max_rpc_payload;
260 /* We probably want something more informative here */
261 snprintf(sb->s_id, sizeof(sb->s_id), "%x:%x", MAJOR(sb->s_dev), MINOR(sb->s_dev));
265 sb->s_magic = NFS_SUPER_MAGIC;
267 server->io_stats = nfs_alloc_iostats();
268 if (server->io_stats == NULL)
271 root_inode = nfs_get_root(sb, &server->fh, &fsinfo);
272 /* Did getting the root inode fail? */
273 if (IS_ERR(root_inode)) {
274 no_root_error = PTR_ERR(root_inode);
277 sb->s_root = d_alloc_root(root_inode);
279 no_root_error = -ENOMEM;
282 sb->s_root->d_op = server->rpc_ops->dentry_ops;
284 /* mount time stamp, in seconds */
285 server->mount_time = jiffies;
287 /* Get some general file system info */
288 if (server->namelen == 0 &&
289 server->rpc_ops->pathconf(server, &server->fh, &pathinfo) >= 0)
290 server->namelen = pathinfo.max_namelen;
291 /* Work out a lot of parameters */
292 if (server->rsize == 0)
293 server->rsize = nfs_block_size(fsinfo.rtpref, NULL);
294 if (server->wsize == 0)
295 server->wsize = nfs_block_size(fsinfo.wtpref, NULL);
297 if (fsinfo.rtmax >= 512 && server->rsize > fsinfo.rtmax)
298 server->rsize = nfs_block_size(fsinfo.rtmax, NULL);
299 if (fsinfo.wtmax >= 512 && server->wsize > fsinfo.wtmax)
300 server->wsize = nfs_block_size(fsinfo.wtmax, NULL);
302 max_rpc_payload = nfs_block_size(rpc_max_payload(server->client), NULL);
303 if (server->rsize > max_rpc_payload)
304 server->rsize = max_rpc_payload;
305 if (server->rsize > NFS_MAX_FILE_IO_SIZE)
306 server->rsize = NFS_MAX_FILE_IO_SIZE;
307 server->rpages = (server->rsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
309 if (server->wsize > max_rpc_payload)
310 server->wsize = max_rpc_payload;
311 if (server->wsize > NFS_MAX_FILE_IO_SIZE)
312 server->wsize = NFS_MAX_FILE_IO_SIZE;
313 server->wpages = (server->wsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
315 if (sb->s_blocksize == 0)
316 sb->s_blocksize = nfs_block_bits(server->wsize,
317 &sb->s_blocksize_bits);
318 server->wtmult = nfs_block_bits(fsinfo.wtmult, NULL);
320 server->dtsize = nfs_block_size(fsinfo.dtpref, NULL);
321 if (server->dtsize > PAGE_CACHE_SIZE)
322 server->dtsize = PAGE_CACHE_SIZE;
323 if (server->dtsize > server->rsize)
324 server->dtsize = server->rsize;
326 if (server->flags & NFS_MOUNT_NOAC) {
327 server->acregmin = server->acregmax = 0;
328 server->acdirmin = server->acdirmax = 0;
329 sb->s_flags |= MS_SYNCHRONOUS;
331 server->backing_dev_info.ra_pages = server->rpages * NFS_MAX_READAHEAD;
333 sb->s_maxbytes = fsinfo.maxfilesize;
334 if (sb->s_maxbytes > MAX_LFS_FILESIZE)
335 sb->s_maxbytes = MAX_LFS_FILESIZE;
337 server->client->cl_intr = (server->flags & NFS_MOUNT_INTR) ? 1 : 0;
338 server->client->cl_softrtry = (server->flags & NFS_MOUNT_SOFT) ? 1 : 0;
340 /* We're airborne Set socket buffersize */
341 rpc_setbufsize(server->client, server->wsize + 100, server->rsize + 100);
343 /* Yargs. It didn't work out. */
345 dprintk("nfs_sb_init: get root inode failed: errno %d\n", -no_root_error);
346 if (!IS_ERR(root_inode))
348 return no_root_error;
351 static void nfs_init_timeout_values(struct rpc_timeout *to, int proto, unsigned int timeo, unsigned int retrans)
353 to->to_initval = timeo * HZ / 10;
354 to->to_retries = retrans;
361 to->to_initval = 60 * HZ;
362 if (to->to_initval > NFS_MAX_TCP_TIMEOUT)
363 to->to_initval = NFS_MAX_TCP_TIMEOUT;
364 to->to_increment = to->to_initval;
365 to->to_maxval = to->to_initval + (to->to_increment * to->to_retries);
366 to->to_exponential = 0;
371 to->to_initval = 11 * HZ / 10;
372 if (to->to_initval > NFS_MAX_UDP_TIMEOUT)
373 to->to_initval = NFS_MAX_UDP_TIMEOUT;
374 to->to_maxval = NFS_MAX_UDP_TIMEOUT;
375 to->to_exponential = 1;
381 * Create an RPC client handle.
383 static struct rpc_clnt *
384 nfs_create_client(struct nfs_server *server, const struct nfs_mount_data *data)
386 struct rpc_timeout timeparms;
387 struct rpc_xprt *xprt = NULL;
388 struct rpc_clnt *clnt = NULL;
389 int proto = (data->flags & NFS_MOUNT_TCP) ? IPPROTO_TCP : IPPROTO_UDP;
391 nfs_init_timeout_values(&timeparms, proto, data->timeo, data->retrans);
393 server->retrans_timeo = timeparms.to_initval;
394 server->retrans_count = timeparms.to_retries;
396 /* create transport and client */
397 xprt = xprt_create_proto(proto, &server->addr, &timeparms);
399 dprintk("%s: cannot create RPC transport. Error = %ld\n",
400 __FUNCTION__, PTR_ERR(xprt));
401 return (struct rpc_clnt *)xprt;
403 clnt = rpc_create_client(xprt, server->hostname, &nfs_program,
404 server->rpc_ops->version, data->pseudoflavor);
406 dprintk("%s: cannot create RPC client. Error = %ld\n",
407 __FUNCTION__, PTR_ERR(xprt));
412 clnt->cl_softrtry = 1;
421 * The way this works is that the mount process passes a structure
422 * in the data argument which contains the server's IP address
423 * and the root file handle obtained from the server's mount
424 * daemon. We stash these away in the private superblock fields.
427 nfs_fill_super(struct super_block *sb, struct nfs_mount_data *data, int silent)
429 struct nfs_server *server;
430 rpc_authflavor_t authflavor;
433 sb->s_blocksize_bits = 0;
436 sb->s_blocksize = nfs_block_size(data->bsize, &sb->s_blocksize_bits);
438 server->rsize = nfs_block_size(data->rsize, NULL);
440 server->wsize = nfs_block_size(data->wsize, NULL);
441 server->flags = data->flags & NFS_MOUNT_FLAGMASK;
443 server->acregmin = data->acregmin*HZ;
444 server->acregmax = data->acregmax*HZ;
445 server->acdirmin = data->acdirmin*HZ;
446 server->acdirmax = data->acdirmax*HZ;
448 /* Start lockd here, before we might error out */
449 if (!(server->flags & NFS_MOUNT_NONLM))
452 server->namelen = data->namlen;
453 server->hostname = kmalloc(strlen(data->hostname) + 1, GFP_KERNEL);
454 if (!server->hostname)
456 strcpy(server->hostname, data->hostname);
458 /* Check NFS protocol revision and initialize RPC op vector
459 * and file handle pool. */
461 if (server->flags & NFS_MOUNT_VER3) {
462 server->rpc_ops = &nfs_v3_clientops;
463 server->caps |= NFS_CAP_READDIRPLUS;
465 server->rpc_ops = &nfs_v2_clientops;
468 server->rpc_ops = &nfs_v2_clientops;
471 /* Fill in pseudoflavor for mount version < 5 */
472 if (!(data->flags & NFS_MOUNT_SECFLAVOUR))
473 data->pseudoflavor = RPC_AUTH_UNIX;
474 authflavor = data->pseudoflavor; /* save for sb_init() */
475 /* XXX maybe we want to add a server->pseudoflavor field */
477 /* Create RPC client handles */
478 server->client = nfs_create_client(server, data);
479 if (IS_ERR(server->client))
480 return PTR_ERR(server->client);
481 /* RFC 2623, sec 2.3.2 */
482 if (authflavor != RPC_AUTH_UNIX) {
483 struct rpc_auth *auth;
485 server->client_sys = rpc_clone_client(server->client);
486 if (IS_ERR(server->client_sys))
487 return PTR_ERR(server->client_sys);
488 auth = rpcauth_create(RPC_AUTH_UNIX, server->client_sys);
490 return PTR_ERR(auth);
492 atomic_inc(&server->client->cl_count);
493 server->client_sys = server->client;
495 if (server->flags & NFS_MOUNT_VER3) {
496 #ifdef CONFIG_NFS_V3_ACL
497 if (!(server->flags & NFS_MOUNT_NOACL)) {
498 server->client_acl = rpc_bind_new_program(server->client, &nfsacl_program, 3);
499 /* No errors! Assume that Sun nfsacls are supported */
500 if (!IS_ERR(server->client_acl))
501 server->caps |= NFS_CAP_ACLS;
504 server->flags &= ~NFS_MOUNT_NOACL;
505 #endif /* CONFIG_NFS_V3_ACL */
507 * The VFS shouldn't apply the umask to mode bits. We will
508 * do so ourselves when necessary.
510 sb->s_flags |= MS_POSIXACL;
511 if (server->namelen == 0 || server->namelen > NFS3_MAXNAMLEN)
512 server->namelen = NFS3_MAXNAMLEN;
515 if (server->namelen == 0 || server->namelen > NFS2_MAXNAMLEN)
516 server->namelen = NFS2_MAXNAMLEN;
519 sb->s_op = &nfs_sops;
520 return nfs_sb_init(sb, authflavor);
524 nfs_statfs(struct super_block *sb, struct kstatfs *buf)
526 struct nfs_server *server = NFS_SB(sb);
527 unsigned char blockbits;
528 unsigned long blockres;
529 struct nfs_fh *rootfh = NFS_FH(sb->s_root->d_inode);
530 struct nfs_fattr fattr;
531 struct nfs_fsstat res = {
538 error = server->rpc_ops->statfs(server, rootfh, &res);
539 buf->f_type = NFS_SUPER_MAGIC;
544 * Current versions of glibc do not correctly handle the
545 * case where f_frsize != f_bsize. Eventually we want to
546 * report the value of wtmult in this field.
548 buf->f_frsize = sb->s_blocksize;
551 * On most *nix systems, f_blocks, f_bfree, and f_bavail
552 * are reported in units of f_frsize. Linux hasn't had
553 * an f_frsize field in its statfs struct until recently,
554 * thus historically Linux's sys_statfs reports these
555 * fields in units of f_bsize.
557 buf->f_bsize = sb->s_blocksize;
558 blockbits = sb->s_blocksize_bits;
559 blockres = (1 << blockbits) - 1;
560 buf->f_blocks = (res.tbytes + blockres) >> blockbits;
561 buf->f_bfree = (res.fbytes + blockres) >> blockbits;
562 buf->f_bavail = (res.abytes + blockres) >> blockbits;
564 buf->f_files = res.tfiles;
565 buf->f_ffree = res.afiles;
567 buf->f_namelen = server->namelen;
573 dprintk("%s: statfs error = %d\n", __FUNCTION__, -error);
574 buf->f_bsize = buf->f_blocks = buf->f_bfree = buf->f_bavail = -1;
579 static void nfs_show_mount_options(struct seq_file *m, struct nfs_server *nfss, int showdefaults)
581 static struct proc_nfs_info {
586 { NFS_MOUNT_SOFT, ",soft", ",hard" },
587 { NFS_MOUNT_INTR, ",intr", "" },
588 { NFS_MOUNT_NOCTO, ",nocto", "" },
589 { NFS_MOUNT_NOAC, ",noac", "" },
590 { NFS_MOUNT_NONLM, ",nolock", "" },
591 { NFS_MOUNT_NOACL, ",noacl", "" },
594 struct proc_nfs_info *nfs_infop;
598 seq_printf(m, ",vers=%d", nfss->rpc_ops->version);
599 seq_printf(m, ",rsize=%d", nfss->rsize);
600 seq_printf(m, ",wsize=%d", nfss->wsize);
601 if (nfss->acregmin != 3*HZ || showdefaults)
602 seq_printf(m, ",acregmin=%d", nfss->acregmin/HZ);
603 if (nfss->acregmax != 60*HZ || showdefaults)
604 seq_printf(m, ",acregmax=%d", nfss->acregmax/HZ);
605 if (nfss->acdirmin != 30*HZ || showdefaults)
606 seq_printf(m, ",acdirmin=%d", nfss->acdirmin/HZ);
607 if (nfss->acdirmax != 60*HZ || showdefaults)
608 seq_printf(m, ",acdirmax=%d", nfss->acdirmax/HZ);
609 for (nfs_infop = nfs_info; nfs_infop->flag; nfs_infop++) {
610 if (nfss->flags & nfs_infop->flag)
611 seq_puts(m, nfs_infop->str);
613 seq_puts(m, nfs_infop->nostr);
615 switch (nfss->client->cl_xprt->prot) {
623 snprintf(buf, sizeof(buf), "%u", nfss->client->cl_xprt->prot);
626 seq_printf(m, ",proto=%s", proto);
627 seq_printf(m, ",timeo=%lu", 10U * nfss->retrans_timeo / HZ);
628 seq_printf(m, ",retrans=%u", nfss->retrans_count);
631 static int nfs_show_options(struct seq_file *m, struct vfsmount *mnt)
633 struct nfs_server *nfss = NFS_SB(mnt->mnt_sb);
635 nfs_show_mount_options(m, nfss, 0);
637 seq_puts(m, ",addr=");
638 seq_escape(m, nfss->hostname, " \t\n\\");
643 static int nfs_show_stats(struct seq_file *m, struct vfsmount *mnt)
646 struct nfs_server *nfss = NFS_SB(mnt->mnt_sb);
647 struct rpc_auth *auth = nfss->client->cl_auth;
648 struct nfs_iostats totals = { };
650 seq_printf(m, "statvers=%s", NFS_IOSTAT_VERS);
653 * Display all mount option settings
655 seq_printf(m, "\n\topts:\t");
656 seq_puts(m, mnt->mnt_sb->s_flags & MS_RDONLY ? "ro" : "rw");
657 seq_puts(m, mnt->mnt_sb->s_flags & MS_SYNCHRONOUS ? ",sync" : "");
658 seq_puts(m, mnt->mnt_sb->s_flags & MS_NOATIME ? ",noatime" : "");
659 seq_puts(m, mnt->mnt_sb->s_flags & MS_NODIRATIME ? ",nodiratime" : "");
660 nfs_show_mount_options(m, nfss, 1);
662 seq_printf(m, "\n\tage:\t%lu", (jiffies - nfss->mount_time) / HZ);
664 seq_printf(m, "\n\tcaps:\t");
665 seq_printf(m, "caps=0x%x", nfss->caps);
666 seq_printf(m, ",wtmult=%d", nfss->wtmult);
667 seq_printf(m, ",dtsize=%d", nfss->dtsize);
668 seq_printf(m, ",bsize=%d", nfss->bsize);
669 seq_printf(m, ",namelen=%d", nfss->namelen);
672 if (nfss->rpc_ops->version == 4) {
673 seq_printf(m, "\n\tnfsv4:\t");
674 seq_printf(m, "bm0=0x%x", nfss->attr_bitmask[0]);
675 seq_printf(m, ",bm1=0x%x", nfss->attr_bitmask[1]);
676 seq_printf(m, ",acl=0x%x", nfss->acl_bitmask);
681 * Display security flavor in effect for this mount
683 seq_printf(m, "\n\tsec:\tflavor=%d", auth->au_ops->au_flavor);
685 seq_printf(m, ",pseudoflavor=%d", auth->au_flavor);
688 * Display superblock I/O counters
690 for_each_possible_cpu(cpu) {
691 struct nfs_iostats *stats;
694 stats = per_cpu_ptr(nfss->io_stats, cpu);
696 for (i = 0; i < __NFSIOS_COUNTSMAX; i++)
697 totals.events[i] += stats->events[i];
698 for (i = 0; i < __NFSIOS_BYTESMAX; i++)
699 totals.bytes[i] += stats->bytes[i];
704 seq_printf(m, "\n\tevents:\t");
705 for (i = 0; i < __NFSIOS_COUNTSMAX; i++)
706 seq_printf(m, "%lu ", totals.events[i]);
707 seq_printf(m, "\n\tbytes:\t");
708 for (i = 0; i < __NFSIOS_BYTESMAX; i++)
709 seq_printf(m, "%Lu ", totals.bytes[i]);
712 rpc_print_iostats(m, nfss->client);
718 * nfs_sync_mapping - helper to flush all mmapped dirty data to disk
720 int nfs_sync_mapping(struct address_space *mapping)
724 if (mapping->nrpages == 0)
726 unmap_mapping_range(mapping, 0, 0, 0);
727 ret = filemap_write_and_wait(mapping);
730 ret = nfs_wb_all(mapping->host);
736 * Invalidate the local caches
738 static void nfs_zap_caches_locked(struct inode *inode)
740 struct nfs_inode *nfsi = NFS_I(inode);
741 int mode = inode->i_mode;
743 nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE);
745 NFS_ATTRTIMEO(inode) = NFS_MINATTRTIMEO(inode);
746 NFS_ATTRTIMEO_UPDATE(inode) = jiffies;
748 memset(NFS_COOKIEVERF(inode), 0, sizeof(NFS_COOKIEVERF(inode)));
749 if (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode))
750 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL|NFS_INO_REVAL_PAGECACHE;
752 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL|NFS_INO_REVAL_PAGECACHE;
755 void nfs_zap_caches(struct inode *inode)
757 spin_lock(&inode->i_lock);
758 nfs_zap_caches_locked(inode);
759 spin_unlock(&inode->i_lock);
762 static void nfs_zap_acl_cache(struct inode *inode)
764 void (*clear_acl_cache)(struct inode *);
766 clear_acl_cache = NFS_PROTO(inode)->clear_acl_cache;
767 if (clear_acl_cache != NULL)
768 clear_acl_cache(inode);
769 spin_lock(&inode->i_lock);
770 NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_ACL;
771 spin_unlock(&inode->i_lock);
775 * Invalidate, but do not unhash, the inode.
776 * NB: must be called with inode->i_lock held!
778 static void nfs_invalidate_inode(struct inode *inode)
780 set_bit(NFS_INO_STALE, &NFS_FLAGS(inode));
781 nfs_zap_caches_locked(inode);
784 struct nfs_find_desc {
786 struct nfs_fattr *fattr;
790 * In NFSv3 we can have 64bit inode numbers. In order to support
791 * this, and re-exported directories (also seen in NFSv2)
792 * we are forced to allow 2 different inodes to have the same
796 nfs_find_actor(struct inode *inode, void *opaque)
798 struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque;
799 struct nfs_fh *fh = desc->fh;
800 struct nfs_fattr *fattr = desc->fattr;
802 if (NFS_FILEID(inode) != fattr->fileid)
804 if (nfs_compare_fh(NFS_FH(inode), fh))
806 if (is_bad_inode(inode) || NFS_STALE(inode))
812 nfs_init_locked(struct inode *inode, void *opaque)
814 struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque;
815 struct nfs_fattr *fattr = desc->fattr;
817 NFS_FILEID(inode) = fattr->fileid;
818 nfs_copy_fh(NFS_FH(inode), desc->fh);
822 /* Don't use READDIRPLUS on directories that we believe are too large */
823 #define NFS_LIMIT_READDIRPLUS (8*PAGE_SIZE)
826 * This is our front-end to iget that looks up inodes by file handle
827 * instead of inode number.
830 nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr)
832 struct nfs_find_desc desc = {
836 struct inode *inode = ERR_PTR(-ENOENT);
839 if ((fattr->valid & NFS_ATTR_FATTR) == 0)
843 printk("NFS: Buggy server - nlink == 0!\n");
847 hash = nfs_fattr_to_ino_t(fattr);
849 inode = iget5_locked(sb, hash, nfs_find_actor, nfs_init_locked, &desc);
851 inode = ERR_PTR(-ENOMEM);
855 if (inode->i_state & I_NEW) {
856 struct nfs_inode *nfsi = NFS_I(inode);
858 /* We set i_ino for the few things that still rely on it,
862 /* We can't support update_atime(), since the server will reset it */
863 inode->i_flags |= S_NOATIME|S_NOCMTIME;
864 inode->i_mode = fattr->mode;
865 /* Why so? Because we want revalidate for devices/FIFOs, and
866 * that's precisely what we have in nfs_file_inode_operations.
868 inode->i_op = NFS_SB(sb)->rpc_ops->file_inode_ops;
869 if (S_ISREG(inode->i_mode)) {
870 inode->i_fop = &nfs_file_operations;
871 inode->i_data.a_ops = &nfs_file_aops;
872 inode->i_data.backing_dev_info = &NFS_SB(sb)->backing_dev_info;
873 } else if (S_ISDIR(inode->i_mode)) {
874 inode->i_op = NFS_SB(sb)->rpc_ops->dir_inode_ops;
875 inode->i_fop = &nfs_dir_operations;
876 if (nfs_server_capable(inode, NFS_CAP_READDIRPLUS)
877 && fattr->size <= NFS_LIMIT_READDIRPLUS)
878 set_bit(NFS_INO_ADVISE_RDPLUS, &NFS_FLAGS(inode));
879 } else if (S_ISLNK(inode->i_mode))
880 inode->i_op = &nfs_symlink_inode_operations;
882 init_special_inode(inode, inode->i_mode, fattr->rdev);
884 nfsi->read_cache_jiffies = fattr->time_start;
885 nfsi->last_updated = jiffies;
886 inode->i_atime = fattr->atime;
887 inode->i_mtime = fattr->mtime;
888 inode->i_ctime = fattr->ctime;
889 if (fattr->valid & NFS_ATTR_FATTR_V4)
890 nfsi->change_attr = fattr->change_attr;
891 inode->i_size = nfs_size_to_loff_t(fattr->size);
892 inode->i_nlink = fattr->nlink;
893 inode->i_uid = fattr->uid;
894 inode->i_gid = fattr->gid;
895 if (fattr->valid & (NFS_ATTR_FATTR_V3 | NFS_ATTR_FATTR_V4)) {
897 * report the blocks in 512byte units
899 inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used);
900 inode->i_blksize = inode->i_sb->s_blocksize;
902 inode->i_blocks = fattr->du.nfs2.blocks;
903 inode->i_blksize = fattr->du.nfs2.blocksize;
905 nfsi->attrtimeo = NFS_MINATTRTIMEO(inode);
906 nfsi->attrtimeo_timestamp = jiffies;
907 memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf));
908 nfsi->cache_access.cred = NULL;
910 unlock_new_inode(inode);
912 nfs_refresh_inode(inode, fattr);
913 dprintk("NFS: nfs_fhget(%s/%Ld ct=%d)\n",
915 (long long)NFS_FILEID(inode),
916 atomic_read(&inode->i_count));
922 dprintk("nfs_fhget: iget failed with error %ld\n", PTR_ERR(inode));
926 #define NFS_VALID_ATTRS (ATTR_MODE|ATTR_UID|ATTR_GID|ATTR_SIZE|ATTR_ATIME|ATTR_ATIME_SET|ATTR_MTIME|ATTR_MTIME_SET)
929 nfs_setattr(struct dentry *dentry, struct iattr *attr)
931 struct inode *inode = dentry->d_inode;
932 struct nfs_fattr fattr;
935 nfs_inc_stats(inode, NFSIOS_VFSSETATTR);
937 if (attr->ia_valid & ATTR_SIZE) {
938 if (!S_ISREG(inode->i_mode) || attr->ia_size == i_size_read(inode))
939 attr->ia_valid &= ~ATTR_SIZE;
942 /* Optimization: if the end result is no change, don't RPC */
943 attr->ia_valid &= NFS_VALID_ATTRS;
944 if (attr->ia_valid == 0)
948 nfs_begin_data_update(inode);
949 /* Write all dirty data */
950 filemap_write_and_wait(inode->i_mapping);
953 * Return any delegations if we're going to change ACLs
955 if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0)
956 nfs_inode_return_delegation(inode);
957 error = NFS_PROTO(inode)->setattr(dentry, &fattr, attr);
959 nfs_refresh_inode(inode, &fattr);
960 nfs_end_data_update(inode);
966 * nfs_setattr_update_inode - Update inode metadata after a setattr call.
967 * @inode: pointer to struct inode
968 * @attr: pointer to struct iattr
970 * Note: we do this in the *proc.c in order to ensure that
971 * it works for things like exclusive creates too.
973 void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr)
975 if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) {
976 if ((attr->ia_valid & ATTR_MODE) != 0) {
977 int mode = attr->ia_mode & S_IALLUGO;
978 mode |= inode->i_mode & ~S_IALLUGO;
979 inode->i_mode = mode;
981 if ((attr->ia_valid & ATTR_UID) != 0)
982 inode->i_uid = attr->ia_uid;
983 if ((attr->ia_valid & ATTR_GID) != 0)
984 inode->i_gid = attr->ia_gid;
985 spin_lock(&inode->i_lock);
986 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
987 spin_unlock(&inode->i_lock);
989 if ((attr->ia_valid & ATTR_SIZE) != 0) {
990 nfs_inc_stats(inode, NFSIOS_SETATTRTRUNC);
991 inode->i_size = attr->ia_size;
992 vmtruncate(inode, attr->ia_size);
996 static int nfs_wait_schedule(void *word)
998 if (signal_pending(current))
1005 * Wait for the inode to get unlocked.
1007 static int nfs_wait_on_inode(struct inode *inode)
1009 struct rpc_clnt *clnt = NFS_CLIENT(inode);
1010 struct nfs_inode *nfsi = NFS_I(inode);
1014 rpc_clnt_sigmask(clnt, &oldmask);
1015 error = wait_on_bit_lock(&nfsi->flags, NFS_INO_REVALIDATING,
1016 nfs_wait_schedule, TASK_INTERRUPTIBLE);
1017 rpc_clnt_sigunmask(clnt, &oldmask);
1022 static void nfs_wake_up_inode(struct inode *inode)
1024 struct nfs_inode *nfsi = NFS_I(inode);
1026 clear_bit(NFS_INO_REVALIDATING, &nfsi->flags);
1027 smp_mb__after_clear_bit();
1028 wake_up_bit(&nfsi->flags, NFS_INO_REVALIDATING);
1031 int nfs_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat)
1033 struct inode *inode = dentry->d_inode;
1034 int need_atime = NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATIME;
1037 /* Flush out writes to the server in order to update c/mtime */
1038 nfs_sync_inode_wait(inode, 0, 0, FLUSH_NOCOMMIT);
1041 * We may force a getattr if the user cares about atime.
1043 * Note that we only have to check the vfsmount flags here:
1044 * - NFS always sets S_NOATIME by so checking it would give a
1046 * - NFS never sets MS_NOATIME or MS_NODIRATIME so there is
1047 * no point in checking those.
1049 if ((mnt->mnt_flags & MNT_NOATIME) ||
1050 ((mnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode)))
1054 err = __nfs_revalidate_inode(NFS_SERVER(inode), inode);
1056 err = nfs_revalidate_inode(NFS_SERVER(inode), inode);
1058 generic_fillattr(inode, stat);
1062 static struct nfs_open_context *alloc_nfs_open_context(struct vfsmount *mnt, struct dentry *dentry, struct rpc_cred *cred)
1064 struct nfs_open_context *ctx;
1066 ctx = (struct nfs_open_context *)kmalloc(sizeof(*ctx), GFP_KERNEL);
1068 atomic_set(&ctx->count, 1);
1069 ctx->dentry = dget(dentry);
1070 ctx->vfsmnt = mntget(mnt);
1071 ctx->cred = get_rpccred(cred);
1073 ctx->lockowner = current->files;
1075 ctx->dir_cookie = 0;
1080 struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx)
1083 atomic_inc(&ctx->count);
1087 void put_nfs_open_context(struct nfs_open_context *ctx)
1089 if (atomic_dec_and_test(&ctx->count)) {
1090 if (!list_empty(&ctx->list)) {
1091 struct inode *inode = ctx->dentry->d_inode;
1092 spin_lock(&inode->i_lock);
1093 list_del(&ctx->list);
1094 spin_unlock(&inode->i_lock);
1096 if (ctx->state != NULL)
1097 nfs4_close_state(ctx->state, ctx->mode);
1098 if (ctx->cred != NULL)
1099 put_rpccred(ctx->cred);
1101 mntput(ctx->vfsmnt);
1107 * Ensure that mmap has a recent RPC credential for use when writing out
1110 static void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx)
1112 struct inode *inode = filp->f_dentry->d_inode;
1113 struct nfs_inode *nfsi = NFS_I(inode);
1115 filp->private_data = get_nfs_open_context(ctx);
1116 spin_lock(&inode->i_lock);
1117 list_add(&ctx->list, &nfsi->open_files);
1118 spin_unlock(&inode->i_lock);
1122 * Given an inode, search for an open context with the desired characteristics
1124 struct nfs_open_context *nfs_find_open_context(struct inode *inode, struct rpc_cred *cred, int mode)
1126 struct nfs_inode *nfsi = NFS_I(inode);
1127 struct nfs_open_context *pos, *ctx = NULL;
1129 spin_lock(&inode->i_lock);
1130 list_for_each_entry(pos, &nfsi->open_files, list) {
1131 if (cred != NULL && pos->cred != cred)
1133 if ((pos->mode & mode) == mode) {
1134 ctx = get_nfs_open_context(pos);
1138 spin_unlock(&inode->i_lock);
1142 static void nfs_file_clear_open_context(struct file *filp)
1144 struct inode *inode = filp->f_dentry->d_inode;
1145 struct nfs_open_context *ctx = (struct nfs_open_context *)filp->private_data;
1148 filp->private_data = NULL;
1149 spin_lock(&inode->i_lock);
1150 list_move_tail(&ctx->list, &NFS_I(inode)->open_files);
1151 spin_unlock(&inode->i_lock);
1152 put_nfs_open_context(ctx);
1157 * These allocate and release file read/write context information.
1159 int nfs_open(struct inode *inode, struct file *filp)
1161 struct nfs_open_context *ctx;
1162 struct rpc_cred *cred;
1164 cred = rpcauth_lookupcred(NFS_CLIENT(inode)->cl_auth, 0);
1166 return PTR_ERR(cred);
1167 ctx = alloc_nfs_open_context(filp->f_vfsmnt, filp->f_dentry, cred);
1171 ctx->mode = filp->f_mode;
1172 nfs_file_set_open_context(filp, ctx);
1173 put_nfs_open_context(ctx);
1177 int nfs_release(struct inode *inode, struct file *filp)
1179 nfs_file_clear_open_context(filp);
1184 * This function is called whenever some part of NFS notices that
1185 * the cached attributes have to be refreshed.
1188 __nfs_revalidate_inode(struct nfs_server *server, struct inode *inode)
1190 int status = -ESTALE;
1191 struct nfs_fattr fattr;
1192 struct nfs_inode *nfsi = NFS_I(inode);
1194 dfprintk(PAGECACHE, "NFS: revalidating (%s/%Ld)\n",
1195 inode->i_sb->s_id, (long long)NFS_FILEID(inode));
1197 nfs_inc_stats(inode, NFSIOS_INODEREVALIDATE);
1199 if (!inode || is_bad_inode(inode))
1201 if (NFS_STALE(inode))
1204 status = nfs_wait_on_inode(inode);
1207 if (NFS_STALE(inode)) {
1209 /* Do we trust the cached ESTALE? */
1210 if (NFS_ATTRTIMEO(inode) != 0) {
1211 if (nfsi->cache_validity & (NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ATIME)) {
1218 status = NFS_PROTO(inode)->getattr(server, NFS_FH(inode), &fattr);
1220 dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) getattr failed, error=%d\n",
1222 (long long)NFS_FILEID(inode), status);
1223 if (status == -ESTALE) {
1224 nfs_zap_caches(inode);
1225 if (!S_ISDIR(inode->i_mode))
1226 set_bit(NFS_INO_STALE, &NFS_FLAGS(inode));
1231 spin_lock(&inode->i_lock);
1232 status = nfs_update_inode(inode, &fattr);
1234 spin_unlock(&inode->i_lock);
1235 dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) refresh failed, error=%d\n",
1237 (long long)NFS_FILEID(inode), status);
1240 spin_unlock(&inode->i_lock);
1242 if (nfsi->cache_validity & NFS_INO_INVALID_ACL)
1243 nfs_zap_acl_cache(inode);
1245 dfprintk(PAGECACHE, "NFS: (%s/%Ld) revalidation complete\n",
1247 (long long)NFS_FILEID(inode));
1250 nfs_wake_up_inode(inode);
1257 int nfs_attribute_timeout(struct inode *inode)
1259 struct nfs_inode *nfsi = NFS_I(inode);
1261 if (nfs_have_delegation(inode, FMODE_READ))
1263 return time_after(jiffies, nfsi->read_cache_jiffies+nfsi->attrtimeo);
1267 * nfs_revalidate_inode - Revalidate the inode attributes
1268 * @server - pointer to nfs_server struct
1269 * @inode - pointer to inode struct
1271 * Updates inode attribute information by retrieving the data from the server.
1273 int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode)
1275 if (!(NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATTR)
1276 && !nfs_attribute_timeout(inode))
1277 return NFS_STALE(inode) ? -ESTALE : 0;
1278 return __nfs_revalidate_inode(server, inode);
1282 * nfs_revalidate_mapping - Revalidate the pagecache
1283 * @inode - pointer to host inode
1284 * @mapping - pointer to mapping
1286 int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping)
1288 struct nfs_inode *nfsi = NFS_I(inode);
1291 if (NFS_STALE(inode))
1293 if ((nfsi->cache_validity & NFS_INO_REVAL_PAGECACHE)
1294 || nfs_attribute_timeout(inode))
1295 ret = __nfs_revalidate_inode(NFS_SERVER(inode), inode);
1297 if (nfsi->cache_validity & NFS_INO_INVALID_DATA) {
1298 nfs_inc_stats(inode, NFSIOS_DATAINVALIDATE);
1299 if (S_ISREG(inode->i_mode))
1300 nfs_sync_mapping(mapping);
1301 invalidate_inode_pages2(mapping);
1303 spin_lock(&inode->i_lock);
1304 nfsi->cache_validity &= ~NFS_INO_INVALID_DATA;
1305 if (S_ISDIR(inode->i_mode)) {
1306 memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf));
1307 /* This ensures we revalidate child dentries */
1308 nfsi->cache_change_attribute = jiffies;
1310 spin_unlock(&inode->i_lock);
1312 dfprintk(PAGECACHE, "NFS: (%s/%Ld) data cache invalidated\n",
1314 (long long)NFS_FILEID(inode));
1320 * nfs_begin_data_update
1321 * @inode - pointer to inode
1322 * Declare that a set of operations will update file data on the server
1324 void nfs_begin_data_update(struct inode *inode)
1326 atomic_inc(&NFS_I(inode)->data_updates);
1330 * nfs_end_data_update
1331 * @inode - pointer to inode
1332 * Declare end of the operations that will update file data
1333 * This will mark the inode as immediately needing revalidation
1334 * of its attribute cache.
1336 void nfs_end_data_update(struct inode *inode)
1338 struct nfs_inode *nfsi = NFS_I(inode);
1340 if (!nfs_have_delegation(inode, FMODE_READ)) {
1341 /* Directories and symlinks: invalidate page cache */
1342 if (S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode)) {
1343 spin_lock(&inode->i_lock);
1344 nfsi->cache_validity |= NFS_INO_INVALID_DATA;
1345 spin_unlock(&inode->i_lock);
1348 nfsi->cache_change_attribute = jiffies;
1349 atomic_dec(&nfsi->data_updates);
1352 static void nfs_wcc_update_inode(struct inode *inode, struct nfs_fattr *fattr)
1354 struct nfs_inode *nfsi = NFS_I(inode);
1356 /* If we have atomic WCC data, we may update some attributes */
1357 if ((fattr->valid & NFS_ATTR_WCC) != 0) {
1358 if (timespec_equal(&inode->i_ctime, &fattr->pre_ctime)) {
1359 memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime));
1360 nfsi->cache_change_attribute = jiffies;
1362 if (timespec_equal(&inode->i_mtime, &fattr->pre_mtime)) {
1363 memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime));
1364 nfsi->cache_change_attribute = jiffies;
1366 if (inode->i_size == fattr->pre_size && nfsi->npages == 0) {
1367 inode->i_size = fattr->size;
1368 nfsi->cache_change_attribute = jiffies;
1374 * nfs_check_inode_attributes - verify consistency of the inode attribute cache
1375 * @inode - pointer to inode
1376 * @fattr - updated attributes
1378 * Verifies the attribute cache. If we have just changed the attributes,
1379 * so that fattr carries weak cache consistency data, then it may
1380 * also update the ctime/mtime/change_attribute.
1382 static int nfs_check_inode_attributes(struct inode *inode, struct nfs_fattr *fattr)
1384 struct nfs_inode *nfsi = NFS_I(inode);
1385 loff_t cur_size, new_isize;
1389 /* Has the inode gone and changed behind our back? */
1390 if (nfsi->fileid != fattr->fileid
1391 || (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) {
1395 /* Are we in the process of updating data on the server? */
1396 data_unstable = nfs_caches_unstable(inode);
1398 /* Do atomic weak cache consistency updates */
1399 nfs_wcc_update_inode(inode, fattr);
1401 if ((fattr->valid & NFS_ATTR_FATTR_V4) != 0 &&
1402 nfsi->change_attr != fattr->change_attr)
1403 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE;
1405 /* Verify a few of the more important attributes */
1406 if (!timespec_equal(&inode->i_mtime, &fattr->mtime))
1407 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE;
1409 cur_size = i_size_read(inode);
1410 new_isize = nfs_size_to_loff_t(fattr->size);
1411 if (cur_size != new_isize && nfsi->npages == 0)
1412 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE;
1414 /* Have any file permissions changed? */
1415 if ((inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)
1416 || inode->i_uid != fattr->uid
1417 || inode->i_gid != fattr->gid)
1418 nfsi->cache_validity |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL;
1420 /* Has the link count changed? */
1421 if (inode->i_nlink != fattr->nlink)
1422 nfsi->cache_validity |= NFS_INO_INVALID_ATTR;
1424 if (!timespec_equal(&inode->i_atime, &fattr->atime))
1425 nfsi->cache_validity |= NFS_INO_INVALID_ATIME;
1427 nfsi->read_cache_jiffies = fattr->time_start;
1432 * nfs_refresh_inode - try to update the inode attribute cache
1433 * @inode - pointer to inode
1434 * @fattr - updated attributes
1436 * Check that an RPC call that returned attributes has not overlapped with
1437 * other recent updates of the inode metadata, then decide whether it is
1438 * safe to do a full update of the inode attributes, or whether just to
1439 * call nfs_check_inode_attributes.
1441 int nfs_refresh_inode(struct inode *inode, struct nfs_fattr *fattr)
1443 struct nfs_inode *nfsi = NFS_I(inode);
1446 if ((fattr->valid & NFS_ATTR_FATTR) == 0)
1448 spin_lock(&inode->i_lock);
1449 if (time_after(fattr->time_start, nfsi->last_updated))
1450 status = nfs_update_inode(inode, fattr);
1452 status = nfs_check_inode_attributes(inode, fattr);
1454 spin_unlock(&inode->i_lock);
1459 * nfs_post_op_update_inode - try to update the inode attribute cache
1460 * @inode - pointer to inode
1461 * @fattr - updated attributes
1463 * After an operation that has changed the inode metadata, mark the
1464 * attribute cache as being invalid, then try to update it.
1466 int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr)
1468 struct nfs_inode *nfsi = NFS_I(inode);
1471 spin_lock(&inode->i_lock);
1472 if (unlikely((fattr->valid & NFS_ATTR_FATTR) == 0)) {
1473 nfsi->cache_validity |= NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE;
1476 status = nfs_update_inode(inode, fattr);
1478 spin_unlock(&inode->i_lock);
1483 * Many nfs protocol calls return the new file attributes after
1484 * an operation. Here we update the inode to reflect the state
1485 * of the server's inode.
1487 * This is a bit tricky because we have to make sure all dirty pages
1488 * have been sent off to the server before calling invalidate_inode_pages.
1489 * To make sure no other process adds more write requests while we try
1490 * our best to flush them, we make them sleep during the attribute refresh.
1492 * A very similar scenario holds for the dir cache.
1494 static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr)
1496 struct nfs_inode *nfsi = NFS_I(inode);
1497 loff_t cur_isize, new_isize;
1498 unsigned int invalid = 0;
1501 dfprintk(VFS, "NFS: %s(%s/%ld ct=%d info=0x%x)\n",
1502 __FUNCTION__, inode->i_sb->s_id, inode->i_ino,
1503 atomic_read(&inode->i_count), fattr->valid);
1505 if (nfsi->fileid != fattr->fileid)
1509 * Make sure the inode's type hasn't changed.
1511 if ((inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT))
1515 * Update the read time so we don't revalidate too often.
1517 nfsi->read_cache_jiffies = fattr->time_start;
1518 nfsi->last_updated = jiffies;
1520 /* Are we racing with known updates of the metadata on the server? */
1521 data_stable = nfs_verify_change_attribute(inode, fattr->time_start);
1523 nfsi->cache_validity &= ~(NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_ATIME);
1525 /* Do atomic weak cache consistency updates */
1526 nfs_wcc_update_inode(inode, fattr);
1528 /* Check if our cached file size is stale */
1529 new_isize = nfs_size_to_loff_t(fattr->size);
1530 cur_isize = i_size_read(inode);
1531 if (new_isize != cur_isize) {
1532 /* Do we perhaps have any outstanding writes? */
1533 if (nfsi->npages == 0) {
1534 /* No, but did we race with nfs_end_data_update()? */
1536 inode->i_size = new_isize;
1537 invalid |= NFS_INO_INVALID_DATA;
1539 invalid |= NFS_INO_INVALID_ATTR;
1540 } else if (new_isize > cur_isize) {
1541 inode->i_size = new_isize;
1542 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
1544 nfsi->cache_change_attribute = jiffies;
1545 dprintk("NFS: isize change on server for file %s/%ld\n",
1546 inode->i_sb->s_id, inode->i_ino);
1549 /* Check if the mtime agrees */
1550 if (!timespec_equal(&inode->i_mtime, &fattr->mtime)) {
1551 memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime));
1552 dprintk("NFS: mtime change on server for file %s/%ld\n",
1553 inode->i_sb->s_id, inode->i_ino);
1554 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
1555 nfsi->cache_change_attribute = jiffies;
1558 /* If ctime has changed we should definitely clear access+acl caches */
1559 if (!timespec_equal(&inode->i_ctime, &fattr->ctime)) {
1560 invalid |= NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
1561 memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime));
1562 nfsi->cache_change_attribute = jiffies;
1564 memcpy(&inode->i_atime, &fattr->atime, sizeof(inode->i_atime));
1566 if ((inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO) ||
1567 inode->i_uid != fattr->uid ||
1568 inode->i_gid != fattr->gid)
1569 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
1571 inode->i_mode = fattr->mode;
1572 inode->i_nlink = fattr->nlink;
1573 inode->i_uid = fattr->uid;
1574 inode->i_gid = fattr->gid;
1576 if (fattr->valid & (NFS_ATTR_FATTR_V3 | NFS_ATTR_FATTR_V4)) {
1578 * report the blocks in 512byte units
1580 inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used);
1581 inode->i_blksize = inode->i_sb->s_blocksize;
1583 inode->i_blocks = fattr->du.nfs2.blocks;
1584 inode->i_blksize = fattr->du.nfs2.blocksize;
1587 if ((fattr->valid & NFS_ATTR_FATTR_V4) != 0 &&
1588 nfsi->change_attr != fattr->change_attr) {
1589 dprintk("NFS: change_attr change on server for file %s/%ld\n",
1590 inode->i_sb->s_id, inode->i_ino);
1591 nfsi->change_attr = fattr->change_attr;
1592 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
1593 nfsi->cache_change_attribute = jiffies;
1596 /* Update attrtimeo value if we're out of the unstable period */
1597 if (invalid & NFS_INO_INVALID_ATTR) {
1598 nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE);
1599 nfsi->attrtimeo = NFS_MINATTRTIMEO(inode);
1600 nfsi->attrtimeo_timestamp = jiffies;
1601 } else if (time_after(jiffies, nfsi->attrtimeo_timestamp+nfsi->attrtimeo)) {
1602 if ((nfsi->attrtimeo <<= 1) > NFS_MAXATTRTIMEO(inode))
1603 nfsi->attrtimeo = NFS_MAXATTRTIMEO(inode);
1604 nfsi->attrtimeo_timestamp = jiffies;
1606 /* Don't invalidate the data if we were to blame */
1607 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode)
1608 || S_ISLNK(inode->i_mode)))
1609 invalid &= ~NFS_INO_INVALID_DATA;
1611 invalid &= ~(NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ATIME|NFS_INO_REVAL_PAGECACHE);
1612 if (!nfs_have_delegation(inode, FMODE_READ))
1613 nfsi->cache_validity |= invalid;
1618 * Big trouble! The inode has become a different object.
1621 printk(KERN_DEBUG "%s: inode %ld mode changed, %07o to %07o\n",
1622 __FUNCTION__, inode->i_ino, inode->i_mode, fattr->mode);
1626 * No need to worry about unhashing the dentry, as the
1627 * lookup validation will know that the inode is bad.
1628 * (But we fall through to invalidate the caches.)
1630 nfs_invalidate_inode(inode);
1634 printk(KERN_ERR "NFS: server %s error: fileid changed\n"
1635 "fsid %s: expected fileid 0x%Lx, got 0x%Lx\n",
1636 NFS_SERVER(inode)->hostname, inode->i_sb->s_id,
1637 (long long)nfsi->fileid, (long long)fattr->fileid);
1642 * File system information
1645 static int nfs_set_super(struct super_block *s, void *data)
1647 s->s_fs_info = data;
1648 return set_anon_super(s, data);
1651 static int nfs_compare_super(struct super_block *sb, void *data)
1653 struct nfs_server *server = data;
1654 struct nfs_server *old = NFS_SB(sb);
1656 if (old->addr.sin_addr.s_addr != server->addr.sin_addr.s_addr)
1658 if (old->addr.sin_port != server->addr.sin_port)
1660 return !nfs_compare_fh(&old->fh, &server->fh);
1663 static struct super_block *nfs_get_sb(struct file_system_type *fs_type,
1664 int flags, const char *dev_name, void *raw_data)
1667 struct nfs_server *server = NULL;
1668 struct super_block *s;
1669 struct nfs_fh *root;
1670 struct nfs_mount_data *data = raw_data;
1672 s = ERR_PTR(-EINVAL);
1674 dprintk("%s: missing data argument\n", __FUNCTION__);
1677 if (data->version <= 0 || data->version > NFS_MOUNT_VERSION) {
1678 dprintk("%s: bad mount version\n", __FUNCTION__);
1681 switch (data->version) {
1687 if (data->flags & NFS_MOUNT_VER3) {
1688 dprintk("%s: mount structure version %d does not support NFSv3\n",
1693 data->root.size = NFS2_FHSIZE;
1694 memcpy(data->root.data, data->old_root.data, NFS2_FHSIZE);
1696 if (data->flags & NFS_MOUNT_SECFLAVOUR) {
1697 dprintk("%s: mount structure version %d does not support strong security\n",
1703 memset(data->context, 0, sizeof(data->context));
1705 #ifndef CONFIG_NFS_V3
1706 /* If NFSv3 is not compiled in, return -EPROTONOSUPPORT */
1707 s = ERR_PTR(-EPROTONOSUPPORT);
1708 if (data->flags & NFS_MOUNT_VER3) {
1709 dprintk("%s: NFSv3 not compiled into kernel\n", __FUNCTION__);
1712 #endif /* CONFIG_NFS_V3 */
1714 s = ERR_PTR(-ENOMEM);
1715 server = kzalloc(sizeof(struct nfs_server), GFP_KERNEL);
1718 /* Zero out the NFS state stuff */
1719 init_nfsv4_state(server);
1720 server->client = server->client_sys = server->client_acl = ERR_PTR(-EINVAL);
1723 if (data->flags & NFS_MOUNT_VER3)
1724 root->size = data->root.size;
1726 root->size = NFS2_FHSIZE;
1727 s = ERR_PTR(-EINVAL);
1728 if (root->size > sizeof(root->data)) {
1729 dprintk("%s: invalid root filehandle\n", __FUNCTION__);
1732 memcpy(root->data, data->root.data, root->size);
1734 /* We now require that the mount process passes the remote address */
1735 memcpy(&server->addr, &data->addr, sizeof(server->addr));
1736 if (server->addr.sin_addr.s_addr == INADDR_ANY) {
1737 dprintk("%s: mount program didn't pass remote address!\n",
1742 /* Fire up rpciod if not yet running */
1743 s = ERR_PTR(rpciod_up());
1745 dprintk("%s: couldn't start rpciod! Error = %ld\n",
1746 __FUNCTION__, PTR_ERR(s));
1750 s = sget(fs_type, nfs_compare_super, nfs_set_super, server);
1751 if (IS_ERR(s) || s->s_root)
1752 goto out_rpciod_down;
1756 error = nfs_fill_super(s, data, flags & MS_SILENT ? 1 : 0);
1758 up_write(&s->s_umount);
1759 deactivate_super(s);
1760 return ERR_PTR(error);
1762 s->s_flags |= MS_ACTIVE;
1771 static void nfs_kill_super(struct super_block *s)
1773 struct nfs_server *server = NFS_SB(s);
1777 if (!IS_ERR(server->client))
1778 rpc_shutdown_client(server->client);
1779 if (!IS_ERR(server->client_sys))
1780 rpc_shutdown_client(server->client_sys);
1781 if (!IS_ERR(server->client_acl))
1782 rpc_shutdown_client(server->client_acl);
1784 if (!(server->flags & NFS_MOUNT_NONLM))
1785 lockd_down(); /* release rpc.lockd */
1787 rpciod_down(); /* release rpciod */
1789 nfs_free_iostats(server->io_stats);
1790 kfree(server->hostname);
1794 static struct file_system_type nfs_fs_type = {
1795 .owner = THIS_MODULE,
1797 .get_sb = nfs_get_sb,
1798 .kill_sb = nfs_kill_super,
1799 .fs_flags = FS_ODD_RENAME|FS_REVAL_DOT|FS_BINARY_MOUNTDATA,
1802 #ifdef CONFIG_NFS_V4
1804 static void nfs4_clear_inode(struct inode *);
1807 static struct super_operations nfs4_sops = {
1808 .alloc_inode = nfs_alloc_inode,
1809 .destroy_inode = nfs_destroy_inode,
1810 .write_inode = nfs_write_inode,
1811 .statfs = nfs_statfs,
1812 .clear_inode = nfs4_clear_inode,
1813 .umount_begin = nfs_umount_begin,
1814 .show_options = nfs_show_options,
1815 .show_stats = nfs_show_stats,
1819 * Clean out any remaining NFSv4 state that might be left over due
1820 * to open() calls that passed nfs_atomic_lookup, but failed to call
1823 static void nfs4_clear_inode(struct inode *inode)
1825 struct nfs_inode *nfsi = NFS_I(inode);
1827 /* If we are holding a delegation, return it! */
1828 nfs_inode_return_delegation(inode);
1829 /* First call standard NFS clear_inode() code */
1830 nfs_clear_inode(inode);
1831 /* Now clear out any remaining state */
1832 while (!list_empty(&nfsi->open_states)) {
1833 struct nfs4_state *state;
1835 state = list_entry(nfsi->open_states.next,
1838 dprintk("%s(%s/%Ld): found unclaimed NFSv4 state %p\n",
1841 (long long)NFS_FILEID(inode),
1843 BUG_ON(atomic_read(&state->count) != 1);
1844 nfs4_close_state(state, state->state);
1849 static int nfs4_fill_super(struct super_block *sb, struct nfs4_mount_data *data, int silent)
1851 struct nfs_server *server;
1852 struct nfs4_client *clp = NULL;
1853 struct rpc_xprt *xprt = NULL;
1854 struct rpc_clnt *clnt = NULL;
1855 struct rpc_timeout timeparms;
1856 rpc_authflavor_t authflavour;
1859 sb->s_blocksize_bits = 0;
1860 sb->s_blocksize = 0;
1861 server = NFS_SB(sb);
1862 if (data->rsize != 0)
1863 server->rsize = nfs_block_size(data->rsize, NULL);
1864 if (data->wsize != 0)
1865 server->wsize = nfs_block_size(data->wsize, NULL);
1866 server->flags = data->flags & NFS_MOUNT_FLAGMASK;
1867 server->caps = NFS_CAP_ATOMIC_OPEN;
1869 server->acregmin = data->acregmin*HZ;
1870 server->acregmax = data->acregmax*HZ;
1871 server->acdirmin = data->acdirmin*HZ;
1872 server->acdirmax = data->acdirmax*HZ;
1874 server->rpc_ops = &nfs_v4_clientops;
1876 nfs_init_timeout_values(&timeparms, data->proto, data->timeo, data->retrans);
1878 server->retrans_timeo = timeparms.to_initval;
1879 server->retrans_count = timeparms.to_retries;
1881 clp = nfs4_get_client(&server->addr.sin_addr);
1883 dprintk("%s: failed to create NFS4 client.\n", __FUNCTION__);
1887 /* Now create transport and client */
1888 authflavour = RPC_AUTH_UNIX;
1889 if (data->auth_flavourlen != 0) {
1890 if (data->auth_flavourlen != 1) {
1891 dprintk("%s: Invalid number of RPC auth flavours %d.\n",
1892 __FUNCTION__, data->auth_flavourlen);
1896 if (copy_from_user(&authflavour, data->auth_flavours, sizeof(authflavour))) {
1902 down_write(&clp->cl_sem);
1903 if (IS_ERR(clp->cl_rpcclient)) {
1904 xprt = xprt_create_proto(data->proto, &server->addr, &timeparms);
1906 up_write(&clp->cl_sem);
1907 err = PTR_ERR(xprt);
1908 dprintk("%s: cannot create RPC transport. Error = %d\n",
1912 clnt = rpc_create_client(xprt, server->hostname, &nfs_program,
1913 server->rpc_ops->version, authflavour);
1915 up_write(&clp->cl_sem);
1916 err = PTR_ERR(clnt);
1917 dprintk("%s: cannot create RPC client. Error = %d\n",
1922 clnt->cl_softrtry = 1;
1923 clp->cl_rpcclient = clnt;
1924 memcpy(clp->cl_ipaddr, server->ip_addr, sizeof(clp->cl_ipaddr));
1927 list_add_tail(&server->nfs4_siblings, &clp->cl_superblocks);
1928 clnt = rpc_clone_client(clp->cl_rpcclient);
1930 server->nfs4_state = clp;
1931 up_write(&clp->cl_sem);
1935 err = PTR_ERR(clnt);
1936 dprintk("%s: cannot create RPC client. Error = %d\n",
1941 server->client = clnt;
1943 if (server->nfs4_state->cl_idmap == NULL) {
1944 dprintk("%s: failed to create idmapper.\n", __FUNCTION__);
1948 if (clnt->cl_auth->au_flavor != authflavour) {
1949 struct rpc_auth *auth;
1951 auth = rpcauth_create(authflavour, clnt);
1953 dprintk("%s: couldn't create credcache!\n", __FUNCTION__);
1954 return PTR_ERR(auth);
1958 sb->s_time_gran = 1;
1960 sb->s_op = &nfs4_sops;
1961 err = nfs_sb_init(sb, authflavour);
1966 nfs4_put_client(clp);
1970 static int nfs4_compare_super(struct super_block *sb, void *data)
1972 struct nfs_server *server = data;
1973 struct nfs_server *old = NFS_SB(sb);
1975 if (strcmp(server->hostname, old->hostname) != 0)
1977 if (strcmp(server->mnt_path, old->mnt_path) != 0)
1983 nfs_copy_user_string(char *dst, struct nfs_string *src, int maxlen)
1988 return ERR_PTR(-EINVAL);
1989 if (src->len < maxlen)
1992 p = dst = kmalloc(maxlen + 1, GFP_KERNEL);
1994 return ERR_PTR(-ENOMEM);
1996 if (copy_from_user(dst, src->data, maxlen)) {
1998 return ERR_PTR(-EFAULT);
2004 static struct super_block *nfs4_get_sb(struct file_system_type *fs_type,
2005 int flags, const char *dev_name, void *raw_data)
2008 struct nfs_server *server;
2009 struct super_block *s;
2010 struct nfs4_mount_data *data = raw_data;
2014 dprintk("%s: missing data argument\n", __FUNCTION__);
2015 return ERR_PTR(-EINVAL);
2017 if (data->version <= 0 || data->version > NFS4_MOUNT_VERSION) {
2018 dprintk("%s: bad mount version\n", __FUNCTION__);
2019 return ERR_PTR(-EINVAL);
2022 server = kzalloc(sizeof(struct nfs_server), GFP_KERNEL);
2024 return ERR_PTR(-ENOMEM);
2025 /* Zero out the NFS state stuff */
2026 init_nfsv4_state(server);
2027 server->client = server->client_sys = server->client_acl = ERR_PTR(-EINVAL);
2029 p = nfs_copy_user_string(NULL, &data->hostname, 256);
2032 server->hostname = p;
2034 p = nfs_copy_user_string(NULL, &data->mnt_path, 1024);
2037 server->mnt_path = p;
2039 p = nfs_copy_user_string(server->ip_addr, &data->client_addr,
2040 sizeof(server->ip_addr) - 1);
2044 /* We now require that the mount process passes the remote address */
2045 if (data->host_addrlen != sizeof(server->addr)) {
2046 s = ERR_PTR(-EINVAL);
2049 if (copy_from_user(&server->addr, data->host_addr, sizeof(server->addr))) {
2050 s = ERR_PTR(-EFAULT);
2053 if (server->addr.sin_family != AF_INET ||
2054 server->addr.sin_addr.s_addr == INADDR_ANY) {
2055 dprintk("%s: mount program didn't pass remote IP address!\n",
2057 s = ERR_PTR(-EINVAL);
2061 /* Fire up rpciod if not yet running */
2062 s = ERR_PTR(rpciod_up());
2064 dprintk("%s: couldn't start rpciod! Error = %ld\n",
2065 __FUNCTION__, PTR_ERR(s));
2069 s = sget(fs_type, nfs4_compare_super, nfs_set_super, server);
2071 if (IS_ERR(s) || s->s_root)
2076 error = nfs4_fill_super(s, data, flags & MS_SILENT ? 1 : 0);
2078 up_write(&s->s_umount);
2079 deactivate_super(s);
2080 return ERR_PTR(error);
2082 s->s_flags |= MS_ACTIVE;
2085 s = (struct super_block *)p;
2087 kfree(server->mnt_path);
2088 kfree(server->hostname);
2093 static void nfs4_kill_super(struct super_block *sb)
2095 struct nfs_server *server = NFS_SB(sb);
2097 nfs_return_all_delegations(sb);
2098 kill_anon_super(sb);
2100 nfs4_renewd_prepare_shutdown(server);
2102 if (server->client != NULL && !IS_ERR(server->client))
2103 rpc_shutdown_client(server->client);
2105 destroy_nfsv4_state(server);
2109 nfs_free_iostats(server->io_stats);
2110 kfree(server->hostname);
2114 static struct file_system_type nfs4_fs_type = {
2115 .owner = THIS_MODULE,
2117 .get_sb = nfs4_get_sb,
2118 .kill_sb = nfs4_kill_super,
2119 .fs_flags = FS_ODD_RENAME|FS_REVAL_DOT|FS_BINARY_MOUNTDATA,
2122 static const int nfs_set_port_min = 0;
2123 static const int nfs_set_port_max = 65535;
2124 static int param_set_port(const char *val, struct kernel_param *kp)
2127 int num = simple_strtol(val, &endp, 0);
2128 if (endp == val || *endp || num < nfs_set_port_min || num > nfs_set_port_max)
2130 *((int *)kp->arg) = num;
2134 module_param_call(callback_tcpport, param_set_port, param_get_int,
2135 &nfs_callback_set_tcpport, 0644);
2137 static int param_set_idmap_timeout(const char *val, struct kernel_param *kp)
2140 int num = simple_strtol(val, &endp, 0);
2142 if (endp == val || *endp || num < 0 || jif < num)
2144 *((int *)kp->arg) = jif;
2148 module_param_call(idmap_cache_timeout, param_set_idmap_timeout, param_get_int,
2149 &nfs_idmap_cache_timeout, 0644);
2151 #define nfs4_init_once(nfsi) \
2153 INIT_LIST_HEAD(&(nfsi)->open_states); \
2154 nfsi->delegation = NULL; \
2155 nfsi->delegation_state = 0; \
2156 init_rwsem(&nfsi->rwsem); \
2159 static inline int register_nfs4fs(void)
2163 ret = nfs_register_sysctl();
2166 ret = register_filesystem(&nfs4_fs_type);
2168 nfs_unregister_sysctl();
2172 static inline void unregister_nfs4fs(void)
2174 unregister_filesystem(&nfs4_fs_type);
2175 nfs_unregister_sysctl();
2178 #define nfs4_init_once(nfsi) \
2180 #define register_nfs4fs() (0)
2181 #define unregister_nfs4fs()
2184 extern int nfs_init_nfspagecache(void);
2185 extern void nfs_destroy_nfspagecache(void);
2186 extern int nfs_init_readpagecache(void);
2187 extern void nfs_destroy_readpagecache(void);
2188 extern int nfs_init_writepagecache(void);
2189 extern void nfs_destroy_writepagecache(void);
2190 #ifdef CONFIG_NFS_DIRECTIO
2191 extern int nfs_init_directcache(void);
2192 extern void nfs_destroy_directcache(void);
2195 static kmem_cache_t * nfs_inode_cachep;
2197 static struct inode *nfs_alloc_inode(struct super_block *sb)
2199 struct nfs_inode *nfsi;
2200 nfsi = (struct nfs_inode *)kmem_cache_alloc(nfs_inode_cachep, SLAB_KERNEL);
2204 nfsi->cache_validity = 0UL;
2205 nfsi->cache_change_attribute = jiffies;
2206 #ifdef CONFIG_NFS_V3_ACL
2207 nfsi->acl_access = ERR_PTR(-EAGAIN);
2208 nfsi->acl_default = ERR_PTR(-EAGAIN);
2210 #ifdef CONFIG_NFS_V4
2211 nfsi->nfs4_acl = NULL;
2212 #endif /* CONFIG_NFS_V4 */
2213 return &nfsi->vfs_inode;
2216 static void nfs_destroy_inode(struct inode *inode)
2218 kmem_cache_free(nfs_inode_cachep, NFS_I(inode));
2221 static void init_once(void * foo, kmem_cache_t * cachep, unsigned long flags)
2223 struct nfs_inode *nfsi = (struct nfs_inode *) foo;
2225 if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) ==
2226 SLAB_CTOR_CONSTRUCTOR) {
2227 inode_init_once(&nfsi->vfs_inode);
2228 spin_lock_init(&nfsi->req_lock);
2229 INIT_LIST_HEAD(&nfsi->dirty);
2230 INIT_LIST_HEAD(&nfsi->commit);
2231 INIT_LIST_HEAD(&nfsi->open_files);
2232 INIT_RADIX_TREE(&nfsi->nfs_page_tree, GFP_ATOMIC);
2233 atomic_set(&nfsi->data_updates, 0);
2237 nfs4_init_once(nfsi);
2241 static int nfs_init_inodecache(void)
2243 nfs_inode_cachep = kmem_cache_create("nfs_inode_cache",
2244 sizeof(struct nfs_inode),
2245 0, (SLAB_RECLAIM_ACCOUNT|
2248 if (nfs_inode_cachep == NULL)
2254 static void nfs_destroy_inodecache(void)
2256 if (kmem_cache_destroy(nfs_inode_cachep))
2257 printk(KERN_INFO "nfs_inode_cache: not all structures were freed\n");
2263 static int __init init_nfs_fs(void)
2267 err = nfs_init_nfspagecache();
2271 err = nfs_init_inodecache();
2275 err = nfs_init_readpagecache();
2279 err = nfs_init_writepagecache();
2283 #ifdef CONFIG_NFS_DIRECTIO
2284 err = nfs_init_directcache();
2289 #ifdef CONFIG_PROC_FS
2290 rpc_proc_register(&nfs_rpcstat);
2292 err = register_filesystem(&nfs_fs_type);
2295 if ((err = register_nfs4fs()) != 0)
2299 #ifdef CONFIG_PROC_FS
2300 rpc_proc_unregister("nfs");
2302 #ifdef CONFIG_NFS_DIRECTIO
2303 nfs_destroy_directcache();
2306 nfs_destroy_writepagecache();
2308 nfs_destroy_readpagecache();
2310 nfs_destroy_inodecache();
2312 nfs_destroy_nfspagecache();
2317 static void __exit exit_nfs_fs(void)
2319 #ifdef CONFIG_NFS_DIRECTIO
2320 nfs_destroy_directcache();
2322 nfs_destroy_writepagecache();
2323 nfs_destroy_readpagecache();
2324 nfs_destroy_inodecache();
2325 nfs_destroy_nfspagecache();
2326 #ifdef CONFIG_PROC_FS
2327 rpc_proc_unregister("nfs");
2329 unregister_filesystem(&nfs_fs_type);
2330 unregister_nfs4fs();
2333 /* Not quite true; I just maintain it */
2334 MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>");
2335 MODULE_LICENSE("GPL");
2337 module_init(init_nfs_fs)
2338 module_exit(exit_nfs_fs)