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 super_block *);
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);
166 nfs_umount_begin(struct super_block *sb)
168 struct rpc_clnt *rpc = NFS_SB(sb)->client;
170 /* -EIO all pending I/O */
172 rpc_killall_tasks(rpc);
173 rpc = NFS_SB(sb)->client_acl;
175 rpc_killall_tasks(rpc);
179 static inline unsigned long
180 nfs_block_bits(unsigned long bsize, unsigned char *nrbitsp)
182 /* make sure blocksize is a power of two */
183 if ((bsize & (bsize - 1)) || nrbitsp) {
184 unsigned char nrbits;
186 for (nrbits = 31; nrbits && !(bsize & (1 << nrbits)); nrbits--)
197 * Calculate the number of 512byte blocks used.
199 static inline unsigned long
200 nfs_calc_block_size(u64 tsize)
202 loff_t used = (tsize + 511) >> 9;
203 return (used > ULONG_MAX) ? ULONG_MAX : used;
207 * Compute and set NFS server blocksize
209 static inline unsigned long
210 nfs_block_size(unsigned long bsize, unsigned char *nrbitsp)
212 if (bsize < NFS_MIN_FILE_IO_SIZE)
213 bsize = NFS_DEF_FILE_IO_SIZE;
214 else if (bsize >= NFS_MAX_FILE_IO_SIZE)
215 bsize = NFS_MAX_FILE_IO_SIZE;
217 return nfs_block_bits(bsize, nrbitsp);
221 * Obtain the root inode of the file system.
223 static struct inode *
224 nfs_get_root(struct super_block *sb, struct nfs_fh *rootfh, struct nfs_fsinfo *fsinfo)
226 struct nfs_server *server = NFS_SB(sb);
229 error = server->rpc_ops->getroot(server, rootfh, fsinfo);
231 dprintk("nfs_get_root: getattr error = %d\n", -error);
232 return ERR_PTR(error);
235 return nfs_fhget(sb, rootfh, fsinfo->fattr);
239 * Do NFS version-independent mount processing, and sanity checking
242 nfs_sb_init(struct super_block *sb, rpc_authflavor_t authflavor)
244 struct nfs_server *server;
245 struct inode *root_inode;
246 struct nfs_fattr fattr;
247 struct nfs_fsinfo fsinfo = {
250 struct nfs_pathconf pathinfo = {
253 int no_root_error = 0;
254 unsigned long max_rpc_payload;
256 /* We probably want something more informative here */
257 snprintf(sb->s_id, sizeof(sb->s_id), "%x:%x", MAJOR(sb->s_dev), MINOR(sb->s_dev));
261 sb->s_magic = NFS_SUPER_MAGIC;
263 server->io_stats = nfs_alloc_iostats();
264 if (server->io_stats == NULL)
267 root_inode = nfs_get_root(sb, &server->fh, &fsinfo);
268 /* Did getting the root inode fail? */
269 if (IS_ERR(root_inode)) {
270 no_root_error = PTR_ERR(root_inode);
273 sb->s_root = d_alloc_root(root_inode);
275 no_root_error = -ENOMEM;
278 sb->s_root->d_op = server->rpc_ops->dentry_ops;
280 /* mount time stamp, in seconds */
281 server->mount_time = jiffies;
283 /* Get some general file system info */
284 if (server->namelen == 0 &&
285 server->rpc_ops->pathconf(server, &server->fh, &pathinfo) >= 0)
286 server->namelen = pathinfo.max_namelen;
287 /* Work out a lot of parameters */
288 if (server->rsize == 0)
289 server->rsize = nfs_block_size(fsinfo.rtpref, NULL);
290 if (server->wsize == 0)
291 server->wsize = nfs_block_size(fsinfo.wtpref, NULL);
293 if (fsinfo.rtmax >= 512 && server->rsize > fsinfo.rtmax)
294 server->rsize = nfs_block_size(fsinfo.rtmax, NULL);
295 if (fsinfo.wtmax >= 512 && server->wsize > fsinfo.wtmax)
296 server->wsize = nfs_block_size(fsinfo.wtmax, NULL);
298 max_rpc_payload = nfs_block_size(rpc_max_payload(server->client), NULL);
299 if (server->rsize > max_rpc_payload)
300 server->rsize = max_rpc_payload;
301 if (server->rsize > NFS_MAX_FILE_IO_SIZE)
302 server->rsize = NFS_MAX_FILE_IO_SIZE;
303 server->rpages = (server->rsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
305 if (server->wsize > max_rpc_payload)
306 server->wsize = max_rpc_payload;
307 if (server->wsize > NFS_MAX_FILE_IO_SIZE)
308 server->wsize = NFS_MAX_FILE_IO_SIZE;
309 server->wpages = (server->wsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
311 if (sb->s_blocksize == 0)
312 sb->s_blocksize = nfs_block_bits(server->wsize,
313 &sb->s_blocksize_bits);
314 server->wtmult = nfs_block_bits(fsinfo.wtmult, NULL);
316 server->dtsize = nfs_block_size(fsinfo.dtpref, NULL);
317 if (server->dtsize > PAGE_CACHE_SIZE)
318 server->dtsize = PAGE_CACHE_SIZE;
319 if (server->dtsize > server->rsize)
320 server->dtsize = server->rsize;
322 if (server->flags & NFS_MOUNT_NOAC) {
323 server->acregmin = server->acregmax = 0;
324 server->acdirmin = server->acdirmax = 0;
325 sb->s_flags |= MS_SYNCHRONOUS;
327 server->backing_dev_info.ra_pages = server->rpages * NFS_MAX_READAHEAD;
329 sb->s_maxbytes = fsinfo.maxfilesize;
330 if (sb->s_maxbytes > MAX_LFS_FILESIZE)
331 sb->s_maxbytes = MAX_LFS_FILESIZE;
333 server->client->cl_intr = (server->flags & NFS_MOUNT_INTR) ? 1 : 0;
334 server->client->cl_softrtry = (server->flags & NFS_MOUNT_SOFT) ? 1 : 0;
336 /* We're airborne Set socket buffersize */
337 rpc_setbufsize(server->client, server->wsize + 100, server->rsize + 100);
339 /* Yargs. It didn't work out. */
341 dprintk("nfs_sb_init: get root inode failed: errno %d\n", -no_root_error);
342 if (!IS_ERR(root_inode))
344 return no_root_error;
347 static void nfs_init_timeout_values(struct rpc_timeout *to, int proto, unsigned int timeo, unsigned int retrans)
349 to->to_initval = timeo * HZ / 10;
350 to->to_retries = retrans;
357 to->to_initval = 60 * HZ;
358 if (to->to_initval > NFS_MAX_TCP_TIMEOUT)
359 to->to_initval = NFS_MAX_TCP_TIMEOUT;
360 to->to_increment = to->to_initval;
361 to->to_maxval = to->to_initval + (to->to_increment * to->to_retries);
362 to->to_exponential = 0;
367 to->to_initval = 11 * HZ / 10;
368 if (to->to_initval > NFS_MAX_UDP_TIMEOUT)
369 to->to_initval = NFS_MAX_UDP_TIMEOUT;
370 to->to_maxval = NFS_MAX_UDP_TIMEOUT;
371 to->to_exponential = 1;
377 * Create an RPC client handle.
379 static struct rpc_clnt *
380 nfs_create_client(struct nfs_server *server, const struct nfs_mount_data *data)
382 struct rpc_timeout timeparms;
383 struct rpc_xprt *xprt = NULL;
384 struct rpc_clnt *clnt = NULL;
385 int proto = (data->flags & NFS_MOUNT_TCP) ? IPPROTO_TCP : IPPROTO_UDP;
387 nfs_init_timeout_values(&timeparms, proto, data->timeo, data->retrans);
389 server->retrans_timeo = timeparms.to_initval;
390 server->retrans_count = timeparms.to_retries;
392 /* create transport and client */
393 xprt = xprt_create_proto(proto, &server->addr, &timeparms);
395 dprintk("%s: cannot create RPC transport. Error = %ld\n",
396 __FUNCTION__, PTR_ERR(xprt));
397 return (struct rpc_clnt *)xprt;
399 clnt = rpc_create_client(xprt, server->hostname, &nfs_program,
400 server->rpc_ops->version, data->pseudoflavor);
402 dprintk("%s: cannot create RPC client. Error = %ld\n",
403 __FUNCTION__, PTR_ERR(xprt));
408 clnt->cl_softrtry = 1;
417 * The way this works is that the mount process passes a structure
418 * in the data argument which contains the server's IP address
419 * and the root file handle obtained from the server's mount
420 * daemon. We stash these away in the private superblock fields.
423 nfs_fill_super(struct super_block *sb, struct nfs_mount_data *data, int silent)
425 struct nfs_server *server;
426 rpc_authflavor_t authflavor;
429 sb->s_blocksize_bits = 0;
432 sb->s_blocksize = nfs_block_size(data->bsize, &sb->s_blocksize_bits);
434 server->rsize = nfs_block_size(data->rsize, NULL);
436 server->wsize = nfs_block_size(data->wsize, NULL);
437 server->flags = data->flags & NFS_MOUNT_FLAGMASK;
439 server->acregmin = data->acregmin*HZ;
440 server->acregmax = data->acregmax*HZ;
441 server->acdirmin = data->acdirmin*HZ;
442 server->acdirmax = data->acdirmax*HZ;
444 /* Start lockd here, before we might error out */
445 if (!(server->flags & NFS_MOUNT_NONLM))
448 server->namelen = data->namlen;
449 server->hostname = kmalloc(strlen(data->hostname) + 1, GFP_KERNEL);
450 if (!server->hostname)
452 strcpy(server->hostname, data->hostname);
454 /* Check NFS protocol revision and initialize RPC op vector
455 * and file handle pool. */
457 if (server->flags & NFS_MOUNT_VER3) {
458 server->rpc_ops = &nfs_v3_clientops;
459 server->caps |= NFS_CAP_READDIRPLUS;
461 server->rpc_ops = &nfs_v2_clientops;
464 server->rpc_ops = &nfs_v2_clientops;
467 /* Fill in pseudoflavor for mount version < 5 */
468 if (!(data->flags & NFS_MOUNT_SECFLAVOUR))
469 data->pseudoflavor = RPC_AUTH_UNIX;
470 authflavor = data->pseudoflavor; /* save for sb_init() */
471 /* XXX maybe we want to add a server->pseudoflavor field */
473 /* Create RPC client handles */
474 server->client = nfs_create_client(server, data);
475 if (IS_ERR(server->client))
476 return PTR_ERR(server->client);
477 /* RFC 2623, sec 2.3.2 */
478 if (authflavor != RPC_AUTH_UNIX) {
479 struct rpc_auth *auth;
481 server->client_sys = rpc_clone_client(server->client);
482 if (IS_ERR(server->client_sys))
483 return PTR_ERR(server->client_sys);
484 auth = rpcauth_create(RPC_AUTH_UNIX, server->client_sys);
486 return PTR_ERR(auth);
488 atomic_inc(&server->client->cl_count);
489 server->client_sys = server->client;
491 if (server->flags & NFS_MOUNT_VER3) {
492 #ifdef CONFIG_NFS_V3_ACL
493 if (!(server->flags & NFS_MOUNT_NOACL)) {
494 server->client_acl = rpc_bind_new_program(server->client, &nfsacl_program, 3);
495 /* No errors! Assume that Sun nfsacls are supported */
496 if (!IS_ERR(server->client_acl))
497 server->caps |= NFS_CAP_ACLS;
500 server->flags &= ~NFS_MOUNT_NOACL;
501 #endif /* CONFIG_NFS_V3_ACL */
503 * The VFS shouldn't apply the umask to mode bits. We will
504 * do so ourselves when necessary.
506 sb->s_flags |= MS_POSIXACL;
507 if (server->namelen == 0 || server->namelen > NFS3_MAXNAMLEN)
508 server->namelen = NFS3_MAXNAMLEN;
511 if (server->namelen == 0 || server->namelen > NFS2_MAXNAMLEN)
512 server->namelen = NFS2_MAXNAMLEN;
515 sb->s_op = &nfs_sops;
516 return nfs_sb_init(sb, authflavor);
520 nfs_statfs(struct super_block *sb, struct kstatfs *buf)
522 struct nfs_server *server = NFS_SB(sb);
523 unsigned char blockbits;
524 unsigned long blockres;
525 struct nfs_fh *rootfh = NFS_FH(sb->s_root->d_inode);
526 struct nfs_fattr fattr;
527 struct nfs_fsstat res = {
534 error = server->rpc_ops->statfs(server, rootfh, &res);
535 buf->f_type = NFS_SUPER_MAGIC;
540 * Current versions of glibc do not correctly handle the
541 * case where f_frsize != f_bsize. Eventually we want to
542 * report the value of wtmult in this field.
544 buf->f_frsize = sb->s_blocksize;
547 * On most *nix systems, f_blocks, f_bfree, and f_bavail
548 * are reported in units of f_frsize. Linux hasn't had
549 * an f_frsize field in its statfs struct until recently,
550 * thus historically Linux's sys_statfs reports these
551 * fields in units of f_bsize.
553 buf->f_bsize = sb->s_blocksize;
554 blockbits = sb->s_blocksize_bits;
555 blockres = (1 << blockbits) - 1;
556 buf->f_blocks = (res.tbytes + blockres) >> blockbits;
557 buf->f_bfree = (res.fbytes + blockres) >> blockbits;
558 buf->f_bavail = (res.abytes + blockres) >> blockbits;
560 buf->f_files = res.tfiles;
561 buf->f_ffree = res.afiles;
563 buf->f_namelen = server->namelen;
569 dprintk("%s: statfs error = %d\n", __FUNCTION__, -error);
570 buf->f_bsize = buf->f_blocks = buf->f_bfree = buf->f_bavail = -1;
575 static void nfs_show_mount_options(struct seq_file *m, struct nfs_server *nfss, int showdefaults)
577 static struct proc_nfs_info {
582 { NFS_MOUNT_SOFT, ",soft", ",hard" },
583 { NFS_MOUNT_INTR, ",intr", "" },
584 { NFS_MOUNT_NOCTO, ",nocto", "" },
585 { NFS_MOUNT_NOAC, ",noac", "" },
586 { NFS_MOUNT_NONLM, ",nolock", "" },
587 { NFS_MOUNT_NOACL, ",noacl", "" },
590 struct proc_nfs_info *nfs_infop;
594 seq_printf(m, ",vers=%d", nfss->rpc_ops->version);
595 seq_printf(m, ",rsize=%d", nfss->rsize);
596 seq_printf(m, ",wsize=%d", nfss->wsize);
597 if (nfss->acregmin != 3*HZ || showdefaults)
598 seq_printf(m, ",acregmin=%d", nfss->acregmin/HZ);
599 if (nfss->acregmax != 60*HZ || showdefaults)
600 seq_printf(m, ",acregmax=%d", nfss->acregmax/HZ);
601 if (nfss->acdirmin != 30*HZ || showdefaults)
602 seq_printf(m, ",acdirmin=%d", nfss->acdirmin/HZ);
603 if (nfss->acdirmax != 60*HZ || showdefaults)
604 seq_printf(m, ",acdirmax=%d", nfss->acdirmax/HZ);
605 for (nfs_infop = nfs_info; nfs_infop->flag; nfs_infop++) {
606 if (nfss->flags & nfs_infop->flag)
607 seq_puts(m, nfs_infop->str);
609 seq_puts(m, nfs_infop->nostr);
611 switch (nfss->client->cl_xprt->prot) {
619 snprintf(buf, sizeof(buf), "%u", nfss->client->cl_xprt->prot);
622 seq_printf(m, ",proto=%s", proto);
623 seq_printf(m, ",timeo=%lu", 10U * nfss->retrans_timeo / HZ);
624 seq_printf(m, ",retrans=%u", nfss->retrans_count);
627 static int nfs_show_options(struct seq_file *m, struct vfsmount *mnt)
629 struct nfs_server *nfss = NFS_SB(mnt->mnt_sb);
631 nfs_show_mount_options(m, nfss, 0);
633 seq_puts(m, ",addr=");
634 seq_escape(m, nfss->hostname, " \t\n\\");
639 static int nfs_show_stats(struct seq_file *m, struct vfsmount *mnt)
642 struct nfs_server *nfss = NFS_SB(mnt->mnt_sb);
643 struct rpc_auth *auth = nfss->client->cl_auth;
644 struct nfs_iostats totals = { };
646 seq_printf(m, "statvers=%s", NFS_IOSTAT_VERS);
649 * Display all mount option settings
651 seq_printf(m, "\n\topts:\t");
652 seq_puts(m, mnt->mnt_sb->s_flags & MS_RDONLY ? "ro" : "rw");
653 seq_puts(m, mnt->mnt_sb->s_flags & MS_SYNCHRONOUS ? ",sync" : "");
654 seq_puts(m, mnt->mnt_sb->s_flags & MS_NOATIME ? ",noatime" : "");
655 seq_puts(m, mnt->mnt_sb->s_flags & MS_NODIRATIME ? ",nodiratime" : "");
656 nfs_show_mount_options(m, nfss, 1);
658 seq_printf(m, "\n\tage:\t%lu", (jiffies - nfss->mount_time) / HZ);
660 seq_printf(m, "\n\tcaps:\t");
661 seq_printf(m, "caps=0x%x", nfss->caps);
662 seq_printf(m, ",wtmult=%d", nfss->wtmult);
663 seq_printf(m, ",dtsize=%d", nfss->dtsize);
664 seq_printf(m, ",bsize=%d", nfss->bsize);
665 seq_printf(m, ",namelen=%d", nfss->namelen);
668 if (nfss->rpc_ops->version == 4) {
669 seq_printf(m, "\n\tnfsv4:\t");
670 seq_printf(m, "bm0=0x%x", nfss->attr_bitmask[0]);
671 seq_printf(m, ",bm1=0x%x", nfss->attr_bitmask[1]);
672 seq_printf(m, ",acl=0x%x", nfss->acl_bitmask);
677 * Display security flavor in effect for this mount
679 seq_printf(m, "\n\tsec:\tflavor=%d", auth->au_ops->au_flavor);
681 seq_printf(m, ",pseudoflavor=%d", auth->au_flavor);
684 * Display superblock I/O counters
686 for_each_possible_cpu(cpu) {
687 struct nfs_iostats *stats;
690 stats = per_cpu_ptr(nfss->io_stats, cpu);
692 for (i = 0; i < __NFSIOS_COUNTSMAX; i++)
693 totals.events[i] += stats->events[i];
694 for (i = 0; i < __NFSIOS_BYTESMAX; i++)
695 totals.bytes[i] += stats->bytes[i];
700 seq_printf(m, "\n\tevents:\t");
701 for (i = 0; i < __NFSIOS_COUNTSMAX; i++)
702 seq_printf(m, "%lu ", totals.events[i]);
703 seq_printf(m, "\n\tbytes:\t");
704 for (i = 0; i < __NFSIOS_BYTESMAX; i++)
705 seq_printf(m, "%Lu ", totals.bytes[i]);
708 rpc_print_iostats(m, nfss->client);
714 * nfs_sync_mapping - helper to flush all mmapped dirty data to disk
716 int nfs_sync_mapping(struct address_space *mapping)
720 if (mapping->nrpages == 0)
722 unmap_mapping_range(mapping, 0, 0, 0);
723 ret = filemap_write_and_wait(mapping);
726 ret = nfs_wb_all(mapping->host);
732 * Invalidate the local caches
734 static void nfs_zap_caches_locked(struct inode *inode)
736 struct nfs_inode *nfsi = NFS_I(inode);
737 int mode = inode->i_mode;
739 nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE);
741 NFS_ATTRTIMEO(inode) = NFS_MINATTRTIMEO(inode);
742 NFS_ATTRTIMEO_UPDATE(inode) = jiffies;
744 memset(NFS_COOKIEVERF(inode), 0, sizeof(NFS_COOKIEVERF(inode)));
745 if (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode))
746 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL|NFS_INO_REVAL_PAGECACHE;
748 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL|NFS_INO_REVAL_PAGECACHE;
751 void nfs_zap_caches(struct inode *inode)
753 spin_lock(&inode->i_lock);
754 nfs_zap_caches_locked(inode);
755 spin_unlock(&inode->i_lock);
758 static void nfs_zap_acl_cache(struct inode *inode)
760 void (*clear_acl_cache)(struct inode *);
762 clear_acl_cache = NFS_PROTO(inode)->clear_acl_cache;
763 if (clear_acl_cache != NULL)
764 clear_acl_cache(inode);
765 spin_lock(&inode->i_lock);
766 NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_ACL;
767 spin_unlock(&inode->i_lock);
771 * Invalidate, but do not unhash, the inode.
772 * NB: must be called with inode->i_lock held!
774 static void nfs_invalidate_inode(struct inode *inode)
776 set_bit(NFS_INO_STALE, &NFS_FLAGS(inode));
777 nfs_zap_caches_locked(inode);
780 struct nfs_find_desc {
782 struct nfs_fattr *fattr;
786 * In NFSv3 we can have 64bit inode numbers. In order to support
787 * this, and re-exported directories (also seen in NFSv2)
788 * we are forced to allow 2 different inodes to have the same
792 nfs_find_actor(struct inode *inode, void *opaque)
794 struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque;
795 struct nfs_fh *fh = desc->fh;
796 struct nfs_fattr *fattr = desc->fattr;
798 if (NFS_FILEID(inode) != fattr->fileid)
800 if (nfs_compare_fh(NFS_FH(inode), fh))
802 if (is_bad_inode(inode) || NFS_STALE(inode))
808 nfs_init_locked(struct inode *inode, void *opaque)
810 struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque;
811 struct nfs_fattr *fattr = desc->fattr;
813 NFS_FILEID(inode) = fattr->fileid;
814 nfs_copy_fh(NFS_FH(inode), desc->fh);
818 /* Don't use READDIRPLUS on directories that we believe are too large */
819 #define NFS_LIMIT_READDIRPLUS (8*PAGE_SIZE)
822 * This is our front-end to iget that looks up inodes by file handle
823 * instead of inode number.
826 nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr)
828 struct nfs_find_desc desc = {
832 struct inode *inode = ERR_PTR(-ENOENT);
835 if ((fattr->valid & NFS_ATTR_FATTR) == 0)
839 printk("NFS: Buggy server - nlink == 0!\n");
843 hash = nfs_fattr_to_ino_t(fattr);
845 inode = iget5_locked(sb, hash, nfs_find_actor, nfs_init_locked, &desc);
847 inode = ERR_PTR(-ENOMEM);
851 if (inode->i_state & I_NEW) {
852 struct nfs_inode *nfsi = NFS_I(inode);
854 /* We set i_ino for the few things that still rely on it,
858 /* We can't support update_atime(), since the server will reset it */
859 inode->i_flags |= S_NOATIME|S_NOCMTIME;
860 inode->i_mode = fattr->mode;
861 /* Why so? Because we want revalidate for devices/FIFOs, and
862 * that's precisely what we have in nfs_file_inode_operations.
864 inode->i_op = NFS_SB(sb)->rpc_ops->file_inode_ops;
865 if (S_ISREG(inode->i_mode)) {
866 inode->i_fop = &nfs_file_operations;
867 inode->i_data.a_ops = &nfs_file_aops;
868 inode->i_data.backing_dev_info = &NFS_SB(sb)->backing_dev_info;
869 } else if (S_ISDIR(inode->i_mode)) {
870 inode->i_op = NFS_SB(sb)->rpc_ops->dir_inode_ops;
871 inode->i_fop = &nfs_dir_operations;
872 if (nfs_server_capable(inode, NFS_CAP_READDIRPLUS)
873 && fattr->size <= NFS_LIMIT_READDIRPLUS)
874 set_bit(NFS_INO_ADVISE_RDPLUS, &NFS_FLAGS(inode));
875 } else if (S_ISLNK(inode->i_mode))
876 inode->i_op = &nfs_symlink_inode_operations;
878 init_special_inode(inode, inode->i_mode, fattr->rdev);
880 nfsi->read_cache_jiffies = fattr->time_start;
881 nfsi->last_updated = jiffies;
882 inode->i_atime = fattr->atime;
883 inode->i_mtime = fattr->mtime;
884 inode->i_ctime = fattr->ctime;
885 if (fattr->valid & NFS_ATTR_FATTR_V4)
886 nfsi->change_attr = fattr->change_attr;
887 inode->i_size = nfs_size_to_loff_t(fattr->size);
888 inode->i_nlink = fattr->nlink;
889 inode->i_uid = fattr->uid;
890 inode->i_gid = fattr->gid;
891 if (fattr->valid & (NFS_ATTR_FATTR_V3 | NFS_ATTR_FATTR_V4)) {
893 * report the blocks in 512byte units
895 inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used);
896 inode->i_blksize = inode->i_sb->s_blocksize;
898 inode->i_blocks = fattr->du.nfs2.blocks;
899 inode->i_blksize = fattr->du.nfs2.blocksize;
901 nfsi->attrtimeo = NFS_MINATTRTIMEO(inode);
902 nfsi->attrtimeo_timestamp = jiffies;
903 memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf));
904 nfsi->cache_access.cred = NULL;
906 unlock_new_inode(inode);
908 nfs_refresh_inode(inode, fattr);
909 dprintk("NFS: nfs_fhget(%s/%Ld ct=%d)\n",
911 (long long)NFS_FILEID(inode),
912 atomic_read(&inode->i_count));
918 dprintk("nfs_fhget: iget failed with error %ld\n", PTR_ERR(inode));
922 #define NFS_VALID_ATTRS (ATTR_MODE|ATTR_UID|ATTR_GID|ATTR_SIZE|ATTR_ATIME|ATTR_ATIME_SET|ATTR_MTIME|ATTR_MTIME_SET)
925 nfs_setattr(struct dentry *dentry, struct iattr *attr)
927 struct inode *inode = dentry->d_inode;
928 struct nfs_fattr fattr;
931 nfs_inc_stats(inode, NFSIOS_VFSSETATTR);
933 if (attr->ia_valid & ATTR_SIZE) {
934 if (!S_ISREG(inode->i_mode) || attr->ia_size == i_size_read(inode))
935 attr->ia_valid &= ~ATTR_SIZE;
938 /* Optimization: if the end result is no change, don't RPC */
939 attr->ia_valid &= NFS_VALID_ATTRS;
940 if (attr->ia_valid == 0)
944 nfs_begin_data_update(inode);
945 /* Write all dirty data */
946 filemap_write_and_wait(inode->i_mapping);
949 * Return any delegations if we're going to change ACLs
951 if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0)
952 nfs_inode_return_delegation(inode);
953 error = NFS_PROTO(inode)->setattr(dentry, &fattr, attr);
955 nfs_refresh_inode(inode, &fattr);
956 nfs_end_data_update(inode);
962 * nfs_setattr_update_inode - Update inode metadata after a setattr call.
963 * @inode: pointer to struct inode
964 * @attr: pointer to struct iattr
966 * Note: we do this in the *proc.c in order to ensure that
967 * it works for things like exclusive creates too.
969 void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr)
971 if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) {
972 if ((attr->ia_valid & ATTR_MODE) != 0) {
973 int mode = attr->ia_mode & S_IALLUGO;
974 mode |= inode->i_mode & ~S_IALLUGO;
975 inode->i_mode = mode;
977 if ((attr->ia_valid & ATTR_UID) != 0)
978 inode->i_uid = attr->ia_uid;
979 if ((attr->ia_valid & ATTR_GID) != 0)
980 inode->i_gid = attr->ia_gid;
981 spin_lock(&inode->i_lock);
982 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
983 spin_unlock(&inode->i_lock);
985 if ((attr->ia_valid & ATTR_SIZE) != 0) {
986 nfs_inc_stats(inode, NFSIOS_SETATTRTRUNC);
987 inode->i_size = attr->ia_size;
988 vmtruncate(inode, attr->ia_size);
992 static int nfs_wait_schedule(void *word)
994 if (signal_pending(current))
1001 * Wait for the inode to get unlocked.
1003 static int nfs_wait_on_inode(struct inode *inode)
1005 struct rpc_clnt *clnt = NFS_CLIENT(inode);
1006 struct nfs_inode *nfsi = NFS_I(inode);
1010 rpc_clnt_sigmask(clnt, &oldmask);
1011 error = wait_on_bit_lock(&nfsi->flags, NFS_INO_REVALIDATING,
1012 nfs_wait_schedule, TASK_INTERRUPTIBLE);
1013 rpc_clnt_sigunmask(clnt, &oldmask);
1018 static void nfs_wake_up_inode(struct inode *inode)
1020 struct nfs_inode *nfsi = NFS_I(inode);
1022 clear_bit(NFS_INO_REVALIDATING, &nfsi->flags);
1023 smp_mb__after_clear_bit();
1024 wake_up_bit(&nfsi->flags, NFS_INO_REVALIDATING);
1027 int nfs_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat)
1029 struct inode *inode = dentry->d_inode;
1030 int need_atime = NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATIME;
1033 /* Flush out writes to the server in order to update c/mtime */
1034 nfs_sync_inode_wait(inode, 0, 0, FLUSH_NOCOMMIT);
1037 * We may force a getattr if the user cares about atime.
1039 * Note that we only have to check the vfsmount flags here:
1040 * - NFS always sets S_NOATIME by so checking it would give a
1042 * - NFS never sets MS_NOATIME or MS_NODIRATIME so there is
1043 * no point in checking those.
1045 if ((mnt->mnt_flags & MNT_NOATIME) ||
1046 ((mnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode)))
1050 err = __nfs_revalidate_inode(NFS_SERVER(inode), inode);
1052 err = nfs_revalidate_inode(NFS_SERVER(inode), inode);
1054 generic_fillattr(inode, stat);
1058 static struct nfs_open_context *alloc_nfs_open_context(struct vfsmount *mnt, struct dentry *dentry, struct rpc_cred *cred)
1060 struct nfs_open_context *ctx;
1062 ctx = (struct nfs_open_context *)kmalloc(sizeof(*ctx), GFP_KERNEL);
1064 atomic_set(&ctx->count, 1);
1065 ctx->dentry = dget(dentry);
1066 ctx->vfsmnt = mntget(mnt);
1067 ctx->cred = get_rpccred(cred);
1069 ctx->lockowner = current->files;
1071 ctx->dir_cookie = 0;
1076 struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx)
1079 atomic_inc(&ctx->count);
1083 void put_nfs_open_context(struct nfs_open_context *ctx)
1085 if (atomic_dec_and_test(&ctx->count)) {
1086 if (!list_empty(&ctx->list)) {
1087 struct inode *inode = ctx->dentry->d_inode;
1088 spin_lock(&inode->i_lock);
1089 list_del(&ctx->list);
1090 spin_unlock(&inode->i_lock);
1092 if (ctx->state != NULL)
1093 nfs4_close_state(ctx->state, ctx->mode);
1094 if (ctx->cred != NULL)
1095 put_rpccred(ctx->cred);
1097 mntput(ctx->vfsmnt);
1103 * Ensure that mmap has a recent RPC credential for use when writing out
1106 static void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx)
1108 struct inode *inode = filp->f_dentry->d_inode;
1109 struct nfs_inode *nfsi = NFS_I(inode);
1111 filp->private_data = get_nfs_open_context(ctx);
1112 spin_lock(&inode->i_lock);
1113 list_add(&ctx->list, &nfsi->open_files);
1114 spin_unlock(&inode->i_lock);
1118 * Given an inode, search for an open context with the desired characteristics
1120 struct nfs_open_context *nfs_find_open_context(struct inode *inode, struct rpc_cred *cred, int mode)
1122 struct nfs_inode *nfsi = NFS_I(inode);
1123 struct nfs_open_context *pos, *ctx = NULL;
1125 spin_lock(&inode->i_lock);
1126 list_for_each_entry(pos, &nfsi->open_files, list) {
1127 if (cred != NULL && pos->cred != cred)
1129 if ((pos->mode & mode) == mode) {
1130 ctx = get_nfs_open_context(pos);
1134 spin_unlock(&inode->i_lock);
1138 static void nfs_file_clear_open_context(struct file *filp)
1140 struct inode *inode = filp->f_dentry->d_inode;
1141 struct nfs_open_context *ctx = (struct nfs_open_context *)filp->private_data;
1144 filp->private_data = NULL;
1145 spin_lock(&inode->i_lock);
1146 list_move_tail(&ctx->list, &NFS_I(inode)->open_files);
1147 spin_unlock(&inode->i_lock);
1148 put_nfs_open_context(ctx);
1153 * These allocate and release file read/write context information.
1155 int nfs_open(struct inode *inode, struct file *filp)
1157 struct nfs_open_context *ctx;
1158 struct rpc_cred *cred;
1160 cred = rpcauth_lookupcred(NFS_CLIENT(inode)->cl_auth, 0);
1162 return PTR_ERR(cred);
1163 ctx = alloc_nfs_open_context(filp->f_vfsmnt, filp->f_dentry, cred);
1167 ctx->mode = filp->f_mode;
1168 nfs_file_set_open_context(filp, ctx);
1169 put_nfs_open_context(ctx);
1173 int nfs_release(struct inode *inode, struct file *filp)
1175 nfs_file_clear_open_context(filp);
1180 * This function is called whenever some part of NFS notices that
1181 * the cached attributes have to be refreshed.
1184 __nfs_revalidate_inode(struct nfs_server *server, struct inode *inode)
1186 int status = -ESTALE;
1187 struct nfs_fattr fattr;
1188 struct nfs_inode *nfsi = NFS_I(inode);
1190 dfprintk(PAGECACHE, "NFS: revalidating (%s/%Ld)\n",
1191 inode->i_sb->s_id, (long long)NFS_FILEID(inode));
1193 nfs_inc_stats(inode, NFSIOS_INODEREVALIDATE);
1195 if (!inode || is_bad_inode(inode))
1197 if (NFS_STALE(inode))
1200 status = nfs_wait_on_inode(inode);
1203 if (NFS_STALE(inode)) {
1205 /* Do we trust the cached ESTALE? */
1206 if (NFS_ATTRTIMEO(inode) != 0) {
1207 if (nfsi->cache_validity & (NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ATIME)) {
1214 status = NFS_PROTO(inode)->getattr(server, NFS_FH(inode), &fattr);
1216 dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) getattr failed, error=%d\n",
1218 (long long)NFS_FILEID(inode), status);
1219 if (status == -ESTALE) {
1220 nfs_zap_caches(inode);
1221 if (!S_ISDIR(inode->i_mode))
1222 set_bit(NFS_INO_STALE, &NFS_FLAGS(inode));
1227 spin_lock(&inode->i_lock);
1228 status = nfs_update_inode(inode, &fattr);
1230 spin_unlock(&inode->i_lock);
1231 dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) refresh failed, error=%d\n",
1233 (long long)NFS_FILEID(inode), status);
1236 spin_unlock(&inode->i_lock);
1238 if (nfsi->cache_validity & NFS_INO_INVALID_ACL)
1239 nfs_zap_acl_cache(inode);
1241 dfprintk(PAGECACHE, "NFS: (%s/%Ld) revalidation complete\n",
1243 (long long)NFS_FILEID(inode));
1246 nfs_wake_up_inode(inode);
1253 int nfs_attribute_timeout(struct inode *inode)
1255 struct nfs_inode *nfsi = NFS_I(inode);
1257 if (nfs_have_delegation(inode, FMODE_READ))
1259 return time_after(jiffies, nfsi->read_cache_jiffies+nfsi->attrtimeo);
1263 * nfs_revalidate_inode - Revalidate the inode attributes
1264 * @server - pointer to nfs_server struct
1265 * @inode - pointer to inode struct
1267 * Updates inode attribute information by retrieving the data from the server.
1269 int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode)
1271 if (!(NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATTR)
1272 && !nfs_attribute_timeout(inode))
1273 return NFS_STALE(inode) ? -ESTALE : 0;
1274 return __nfs_revalidate_inode(server, inode);
1278 * nfs_revalidate_mapping - Revalidate the pagecache
1279 * @inode - pointer to host inode
1280 * @mapping - pointer to mapping
1282 int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping)
1284 struct nfs_inode *nfsi = NFS_I(inode);
1287 if (NFS_STALE(inode))
1289 if ((nfsi->cache_validity & NFS_INO_REVAL_PAGECACHE)
1290 || nfs_attribute_timeout(inode))
1291 ret = __nfs_revalidate_inode(NFS_SERVER(inode), inode);
1293 if (nfsi->cache_validity & NFS_INO_INVALID_DATA) {
1294 nfs_inc_stats(inode, NFSIOS_DATAINVALIDATE);
1295 if (S_ISREG(inode->i_mode))
1296 nfs_sync_mapping(mapping);
1297 invalidate_inode_pages2(mapping);
1299 spin_lock(&inode->i_lock);
1300 nfsi->cache_validity &= ~NFS_INO_INVALID_DATA;
1301 if (S_ISDIR(inode->i_mode)) {
1302 memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf));
1303 /* This ensures we revalidate child dentries */
1304 nfsi->cache_change_attribute = jiffies;
1306 spin_unlock(&inode->i_lock);
1308 dfprintk(PAGECACHE, "NFS: (%s/%Ld) data cache invalidated\n",
1310 (long long)NFS_FILEID(inode));
1316 * nfs_begin_data_update
1317 * @inode - pointer to inode
1318 * Declare that a set of operations will update file data on the server
1320 void nfs_begin_data_update(struct inode *inode)
1322 atomic_inc(&NFS_I(inode)->data_updates);
1326 * nfs_end_data_update
1327 * @inode - pointer to inode
1328 * Declare end of the operations that will update file data
1329 * This will mark the inode as immediately needing revalidation
1330 * of its attribute cache.
1332 void nfs_end_data_update(struct inode *inode)
1334 struct nfs_inode *nfsi = NFS_I(inode);
1336 if (!nfs_have_delegation(inode, FMODE_READ)) {
1337 /* Directories and symlinks: invalidate page cache */
1338 if (S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode)) {
1339 spin_lock(&inode->i_lock);
1340 nfsi->cache_validity |= NFS_INO_INVALID_DATA;
1341 spin_unlock(&inode->i_lock);
1344 nfsi->cache_change_attribute = jiffies;
1345 atomic_dec(&nfsi->data_updates);
1348 static void nfs_wcc_update_inode(struct inode *inode, struct nfs_fattr *fattr)
1350 struct nfs_inode *nfsi = NFS_I(inode);
1352 /* If we have atomic WCC data, we may update some attributes */
1353 if ((fattr->valid & NFS_ATTR_WCC) != 0) {
1354 if (timespec_equal(&inode->i_ctime, &fattr->pre_ctime)) {
1355 memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime));
1356 nfsi->cache_change_attribute = jiffies;
1358 if (timespec_equal(&inode->i_mtime, &fattr->pre_mtime)) {
1359 memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime));
1360 nfsi->cache_change_attribute = jiffies;
1362 if (inode->i_size == fattr->pre_size && nfsi->npages == 0) {
1363 inode->i_size = fattr->size;
1364 nfsi->cache_change_attribute = jiffies;
1370 * nfs_check_inode_attributes - verify consistency of the inode attribute cache
1371 * @inode - pointer to inode
1372 * @fattr - updated attributes
1374 * Verifies the attribute cache. If we have just changed the attributes,
1375 * so that fattr carries weak cache consistency data, then it may
1376 * also update the ctime/mtime/change_attribute.
1378 static int nfs_check_inode_attributes(struct inode *inode, struct nfs_fattr *fattr)
1380 struct nfs_inode *nfsi = NFS_I(inode);
1381 loff_t cur_size, new_isize;
1385 /* Has the inode gone and changed behind our back? */
1386 if (nfsi->fileid != fattr->fileid
1387 || (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) {
1391 /* Are we in the process of updating data on the server? */
1392 data_unstable = nfs_caches_unstable(inode);
1394 /* Do atomic weak cache consistency updates */
1395 nfs_wcc_update_inode(inode, fattr);
1397 if ((fattr->valid & NFS_ATTR_FATTR_V4) != 0 &&
1398 nfsi->change_attr != fattr->change_attr)
1399 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE;
1401 /* Verify a few of the more important attributes */
1402 if (!timespec_equal(&inode->i_mtime, &fattr->mtime))
1403 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE;
1405 cur_size = i_size_read(inode);
1406 new_isize = nfs_size_to_loff_t(fattr->size);
1407 if (cur_size != new_isize && nfsi->npages == 0)
1408 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE;
1410 /* Have any file permissions changed? */
1411 if ((inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)
1412 || inode->i_uid != fattr->uid
1413 || inode->i_gid != fattr->gid)
1414 nfsi->cache_validity |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL;
1416 /* Has the link count changed? */
1417 if (inode->i_nlink != fattr->nlink)
1418 nfsi->cache_validity |= NFS_INO_INVALID_ATTR;
1420 if (!timespec_equal(&inode->i_atime, &fattr->atime))
1421 nfsi->cache_validity |= NFS_INO_INVALID_ATIME;
1423 nfsi->read_cache_jiffies = fattr->time_start;
1428 * nfs_refresh_inode - try to update the inode attribute cache
1429 * @inode - pointer to inode
1430 * @fattr - updated attributes
1432 * Check that an RPC call that returned attributes has not overlapped with
1433 * other recent updates of the inode metadata, then decide whether it is
1434 * safe to do a full update of the inode attributes, or whether just to
1435 * call nfs_check_inode_attributes.
1437 int nfs_refresh_inode(struct inode *inode, struct nfs_fattr *fattr)
1439 struct nfs_inode *nfsi = NFS_I(inode);
1442 if ((fattr->valid & NFS_ATTR_FATTR) == 0)
1444 spin_lock(&inode->i_lock);
1445 if (time_after(fattr->time_start, nfsi->last_updated))
1446 status = nfs_update_inode(inode, fattr);
1448 status = nfs_check_inode_attributes(inode, fattr);
1450 spin_unlock(&inode->i_lock);
1455 * nfs_post_op_update_inode - try to update the inode attribute cache
1456 * @inode - pointer to inode
1457 * @fattr - updated attributes
1459 * After an operation that has changed the inode metadata, mark the
1460 * attribute cache as being invalid, then try to update it.
1462 int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr)
1464 struct nfs_inode *nfsi = NFS_I(inode);
1467 spin_lock(&inode->i_lock);
1468 if (unlikely((fattr->valid & NFS_ATTR_FATTR) == 0)) {
1469 nfsi->cache_validity |= NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE;
1472 status = nfs_update_inode(inode, fattr);
1474 spin_unlock(&inode->i_lock);
1479 * Many nfs protocol calls return the new file attributes after
1480 * an operation. Here we update the inode to reflect the state
1481 * of the server's inode.
1483 * This is a bit tricky because we have to make sure all dirty pages
1484 * have been sent off to the server before calling invalidate_inode_pages.
1485 * To make sure no other process adds more write requests while we try
1486 * our best to flush them, we make them sleep during the attribute refresh.
1488 * A very similar scenario holds for the dir cache.
1490 static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr)
1492 struct nfs_inode *nfsi = NFS_I(inode);
1493 loff_t cur_isize, new_isize;
1494 unsigned int invalid = 0;
1497 dfprintk(VFS, "NFS: %s(%s/%ld ct=%d info=0x%x)\n",
1498 __FUNCTION__, inode->i_sb->s_id, inode->i_ino,
1499 atomic_read(&inode->i_count), fattr->valid);
1501 if (nfsi->fileid != fattr->fileid)
1505 * Make sure the inode's type hasn't changed.
1507 if ((inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT))
1511 * Update the read time so we don't revalidate too often.
1513 nfsi->read_cache_jiffies = fattr->time_start;
1514 nfsi->last_updated = jiffies;
1516 /* Are we racing with known updates of the metadata on the server? */
1517 data_stable = nfs_verify_change_attribute(inode, fattr->time_start);
1519 nfsi->cache_validity &= ~(NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_ATIME);
1521 /* Do atomic weak cache consistency updates */
1522 nfs_wcc_update_inode(inode, fattr);
1524 /* Check if our cached file size is stale */
1525 new_isize = nfs_size_to_loff_t(fattr->size);
1526 cur_isize = i_size_read(inode);
1527 if (new_isize != cur_isize) {
1528 /* Do we perhaps have any outstanding writes? */
1529 if (nfsi->npages == 0) {
1530 /* No, but did we race with nfs_end_data_update()? */
1532 inode->i_size = new_isize;
1533 invalid |= NFS_INO_INVALID_DATA;
1535 invalid |= NFS_INO_INVALID_ATTR;
1536 } else if (new_isize > cur_isize) {
1537 inode->i_size = new_isize;
1538 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
1540 nfsi->cache_change_attribute = jiffies;
1541 dprintk("NFS: isize change on server for file %s/%ld\n",
1542 inode->i_sb->s_id, inode->i_ino);
1545 /* Check if the mtime agrees */
1546 if (!timespec_equal(&inode->i_mtime, &fattr->mtime)) {
1547 memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime));
1548 dprintk("NFS: mtime change on server for file %s/%ld\n",
1549 inode->i_sb->s_id, inode->i_ino);
1550 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
1551 nfsi->cache_change_attribute = jiffies;
1554 /* If ctime has changed we should definitely clear access+acl caches */
1555 if (!timespec_equal(&inode->i_ctime, &fattr->ctime)) {
1556 invalid |= NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
1557 memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime));
1558 nfsi->cache_change_attribute = jiffies;
1560 memcpy(&inode->i_atime, &fattr->atime, sizeof(inode->i_atime));
1562 if ((inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO) ||
1563 inode->i_uid != fattr->uid ||
1564 inode->i_gid != fattr->gid)
1565 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
1567 inode->i_mode = fattr->mode;
1568 inode->i_nlink = fattr->nlink;
1569 inode->i_uid = fattr->uid;
1570 inode->i_gid = fattr->gid;
1572 if (fattr->valid & (NFS_ATTR_FATTR_V3 | NFS_ATTR_FATTR_V4)) {
1574 * report the blocks in 512byte units
1576 inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used);
1577 inode->i_blksize = inode->i_sb->s_blocksize;
1579 inode->i_blocks = fattr->du.nfs2.blocks;
1580 inode->i_blksize = fattr->du.nfs2.blocksize;
1583 if ((fattr->valid & NFS_ATTR_FATTR_V4) != 0 &&
1584 nfsi->change_attr != fattr->change_attr) {
1585 dprintk("NFS: change_attr change on server for file %s/%ld\n",
1586 inode->i_sb->s_id, inode->i_ino);
1587 nfsi->change_attr = fattr->change_attr;
1588 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
1589 nfsi->cache_change_attribute = jiffies;
1592 /* Update attrtimeo value if we're out of the unstable period */
1593 if (invalid & NFS_INO_INVALID_ATTR) {
1594 nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE);
1595 nfsi->attrtimeo = NFS_MINATTRTIMEO(inode);
1596 nfsi->attrtimeo_timestamp = jiffies;
1597 } else if (time_after(jiffies, nfsi->attrtimeo_timestamp+nfsi->attrtimeo)) {
1598 if ((nfsi->attrtimeo <<= 1) > NFS_MAXATTRTIMEO(inode))
1599 nfsi->attrtimeo = NFS_MAXATTRTIMEO(inode);
1600 nfsi->attrtimeo_timestamp = jiffies;
1602 /* Don't invalidate the data if we were to blame */
1603 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode)
1604 || S_ISLNK(inode->i_mode)))
1605 invalid &= ~NFS_INO_INVALID_DATA;
1607 invalid &= ~(NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ATIME|NFS_INO_REVAL_PAGECACHE);
1608 if (!nfs_have_delegation(inode, FMODE_READ))
1609 nfsi->cache_validity |= invalid;
1614 * Big trouble! The inode has become a different object.
1617 printk(KERN_DEBUG "%s: inode %ld mode changed, %07o to %07o\n",
1618 __FUNCTION__, inode->i_ino, inode->i_mode, fattr->mode);
1622 * No need to worry about unhashing the dentry, as the
1623 * lookup validation will know that the inode is bad.
1624 * (But we fall through to invalidate the caches.)
1626 nfs_invalidate_inode(inode);
1630 printk(KERN_ERR "NFS: server %s error: fileid changed\n"
1631 "fsid %s: expected fileid 0x%Lx, got 0x%Lx\n",
1632 NFS_SERVER(inode)->hostname, inode->i_sb->s_id,
1633 (long long)nfsi->fileid, (long long)fattr->fileid);
1638 * File system information
1641 static int nfs_set_super(struct super_block *s, void *data)
1643 s->s_fs_info = data;
1644 return set_anon_super(s, data);
1647 static int nfs_compare_super(struct super_block *sb, void *data)
1649 struct nfs_server *server = data;
1650 struct nfs_server *old = NFS_SB(sb);
1652 if (old->addr.sin_addr.s_addr != server->addr.sin_addr.s_addr)
1654 if (old->addr.sin_port != server->addr.sin_port)
1656 return !nfs_compare_fh(&old->fh, &server->fh);
1659 static struct super_block *nfs_get_sb(struct file_system_type *fs_type,
1660 int flags, const char *dev_name, void *raw_data)
1663 struct nfs_server *server = NULL;
1664 struct super_block *s;
1665 struct nfs_fh *root;
1666 struct nfs_mount_data *data = raw_data;
1668 s = ERR_PTR(-EINVAL);
1670 dprintk("%s: missing data argument\n", __FUNCTION__);
1673 if (data->version <= 0 || data->version > NFS_MOUNT_VERSION) {
1674 dprintk("%s: bad mount version\n", __FUNCTION__);
1677 switch (data->version) {
1683 if (data->flags & NFS_MOUNT_VER3) {
1684 dprintk("%s: mount structure version %d does not support NFSv3\n",
1689 data->root.size = NFS2_FHSIZE;
1690 memcpy(data->root.data, data->old_root.data, NFS2_FHSIZE);
1692 if (data->flags & NFS_MOUNT_SECFLAVOUR) {
1693 dprintk("%s: mount structure version %d does not support strong security\n",
1699 memset(data->context, 0, sizeof(data->context));
1701 #ifndef CONFIG_NFS_V3
1702 /* If NFSv3 is not compiled in, return -EPROTONOSUPPORT */
1703 s = ERR_PTR(-EPROTONOSUPPORT);
1704 if (data->flags & NFS_MOUNT_VER3) {
1705 dprintk("%s: NFSv3 not compiled into kernel\n", __FUNCTION__);
1708 #endif /* CONFIG_NFS_V3 */
1710 s = ERR_PTR(-ENOMEM);
1711 server = kzalloc(sizeof(struct nfs_server), GFP_KERNEL);
1714 /* Zero out the NFS state stuff */
1715 init_nfsv4_state(server);
1716 server->client = server->client_sys = server->client_acl = ERR_PTR(-EINVAL);
1719 if (data->flags & NFS_MOUNT_VER3)
1720 root->size = data->root.size;
1722 root->size = NFS2_FHSIZE;
1723 s = ERR_PTR(-EINVAL);
1724 if (root->size > sizeof(root->data)) {
1725 dprintk("%s: invalid root filehandle\n", __FUNCTION__);
1728 memcpy(root->data, data->root.data, root->size);
1730 /* We now require that the mount process passes the remote address */
1731 memcpy(&server->addr, &data->addr, sizeof(server->addr));
1732 if (server->addr.sin_addr.s_addr == INADDR_ANY) {
1733 dprintk("%s: mount program didn't pass remote address!\n",
1738 /* Fire up rpciod if not yet running */
1739 s = ERR_PTR(rpciod_up());
1741 dprintk("%s: couldn't start rpciod! Error = %ld\n",
1742 __FUNCTION__, PTR_ERR(s));
1746 s = sget(fs_type, nfs_compare_super, nfs_set_super, server);
1747 if (IS_ERR(s) || s->s_root)
1748 goto out_rpciod_down;
1752 error = nfs_fill_super(s, data, flags & MS_SILENT ? 1 : 0);
1754 up_write(&s->s_umount);
1755 deactivate_super(s);
1756 return ERR_PTR(error);
1758 s->s_flags |= MS_ACTIVE;
1767 static void nfs_kill_super(struct super_block *s)
1769 struct nfs_server *server = NFS_SB(s);
1773 if (!IS_ERR(server->client))
1774 rpc_shutdown_client(server->client);
1775 if (!IS_ERR(server->client_sys))
1776 rpc_shutdown_client(server->client_sys);
1777 if (!IS_ERR(server->client_acl))
1778 rpc_shutdown_client(server->client_acl);
1780 if (!(server->flags & NFS_MOUNT_NONLM))
1781 lockd_down(); /* release rpc.lockd */
1783 rpciod_down(); /* release rpciod */
1785 nfs_free_iostats(server->io_stats);
1786 kfree(server->hostname);
1790 static struct file_system_type nfs_fs_type = {
1791 .owner = THIS_MODULE,
1793 .get_sb = nfs_get_sb,
1794 .kill_sb = nfs_kill_super,
1795 .fs_flags = FS_ODD_RENAME|FS_REVAL_DOT|FS_BINARY_MOUNTDATA,
1798 #ifdef CONFIG_NFS_V4
1800 static void nfs4_clear_inode(struct inode *);
1803 static struct super_operations nfs4_sops = {
1804 .alloc_inode = nfs_alloc_inode,
1805 .destroy_inode = nfs_destroy_inode,
1806 .write_inode = nfs_write_inode,
1807 .statfs = nfs_statfs,
1808 .clear_inode = nfs4_clear_inode,
1809 .umount_begin = nfs_umount_begin,
1810 .show_options = nfs_show_options,
1811 .show_stats = nfs_show_stats,
1815 * Clean out any remaining NFSv4 state that might be left over due
1816 * to open() calls that passed nfs_atomic_lookup, but failed to call
1819 static void nfs4_clear_inode(struct inode *inode)
1821 struct nfs_inode *nfsi = NFS_I(inode);
1823 /* If we are holding a delegation, return it! */
1824 nfs_inode_return_delegation(inode);
1825 /* First call standard NFS clear_inode() code */
1826 nfs_clear_inode(inode);
1827 /* Now clear out any remaining state */
1828 while (!list_empty(&nfsi->open_states)) {
1829 struct nfs4_state *state;
1831 state = list_entry(nfsi->open_states.next,
1834 dprintk("%s(%s/%Ld): found unclaimed NFSv4 state %p\n",
1837 (long long)NFS_FILEID(inode),
1839 BUG_ON(atomic_read(&state->count) != 1);
1840 nfs4_close_state(state, state->state);
1845 static int nfs4_fill_super(struct super_block *sb, struct nfs4_mount_data *data, int silent)
1847 struct nfs_server *server;
1848 struct nfs4_client *clp = NULL;
1849 struct rpc_xprt *xprt = NULL;
1850 struct rpc_clnt *clnt = NULL;
1851 struct rpc_timeout timeparms;
1852 rpc_authflavor_t authflavour;
1855 sb->s_blocksize_bits = 0;
1856 sb->s_blocksize = 0;
1857 server = NFS_SB(sb);
1858 if (data->rsize != 0)
1859 server->rsize = nfs_block_size(data->rsize, NULL);
1860 if (data->wsize != 0)
1861 server->wsize = nfs_block_size(data->wsize, NULL);
1862 server->flags = data->flags & NFS_MOUNT_FLAGMASK;
1863 server->caps = NFS_CAP_ATOMIC_OPEN;
1865 server->acregmin = data->acregmin*HZ;
1866 server->acregmax = data->acregmax*HZ;
1867 server->acdirmin = data->acdirmin*HZ;
1868 server->acdirmax = data->acdirmax*HZ;
1870 server->rpc_ops = &nfs_v4_clientops;
1872 nfs_init_timeout_values(&timeparms, data->proto, data->timeo, data->retrans);
1874 server->retrans_timeo = timeparms.to_initval;
1875 server->retrans_count = timeparms.to_retries;
1877 clp = nfs4_get_client(&server->addr.sin_addr);
1879 dprintk("%s: failed to create NFS4 client.\n", __FUNCTION__);
1883 /* Now create transport and client */
1884 authflavour = RPC_AUTH_UNIX;
1885 if (data->auth_flavourlen != 0) {
1886 if (data->auth_flavourlen != 1) {
1887 dprintk("%s: Invalid number of RPC auth flavours %d.\n",
1888 __FUNCTION__, data->auth_flavourlen);
1892 if (copy_from_user(&authflavour, data->auth_flavours, sizeof(authflavour))) {
1898 down_write(&clp->cl_sem);
1899 if (IS_ERR(clp->cl_rpcclient)) {
1900 xprt = xprt_create_proto(data->proto, &server->addr, &timeparms);
1902 up_write(&clp->cl_sem);
1903 err = PTR_ERR(xprt);
1904 dprintk("%s: cannot create RPC transport. Error = %d\n",
1908 clnt = rpc_create_client(xprt, server->hostname, &nfs_program,
1909 server->rpc_ops->version, authflavour);
1911 up_write(&clp->cl_sem);
1912 err = PTR_ERR(clnt);
1913 dprintk("%s: cannot create RPC client. Error = %d\n",
1918 clnt->cl_softrtry = 1;
1919 clp->cl_rpcclient = clnt;
1920 memcpy(clp->cl_ipaddr, server->ip_addr, sizeof(clp->cl_ipaddr));
1923 list_add_tail(&server->nfs4_siblings, &clp->cl_superblocks);
1924 clnt = rpc_clone_client(clp->cl_rpcclient);
1926 server->nfs4_state = clp;
1927 up_write(&clp->cl_sem);
1931 err = PTR_ERR(clnt);
1932 dprintk("%s: cannot create RPC client. Error = %d\n",
1937 server->client = clnt;
1939 if (server->nfs4_state->cl_idmap == NULL) {
1940 dprintk("%s: failed to create idmapper.\n", __FUNCTION__);
1944 if (clnt->cl_auth->au_flavor != authflavour) {
1945 struct rpc_auth *auth;
1947 auth = rpcauth_create(authflavour, clnt);
1949 dprintk("%s: couldn't create credcache!\n", __FUNCTION__);
1950 return PTR_ERR(auth);
1954 sb->s_time_gran = 1;
1956 sb->s_op = &nfs4_sops;
1957 err = nfs_sb_init(sb, authflavour);
1962 nfs4_put_client(clp);
1966 static int nfs4_compare_super(struct super_block *sb, void *data)
1968 struct nfs_server *server = data;
1969 struct nfs_server *old = NFS_SB(sb);
1971 if (strcmp(server->hostname, old->hostname) != 0)
1973 if (strcmp(server->mnt_path, old->mnt_path) != 0)
1979 nfs_copy_user_string(char *dst, struct nfs_string *src, int maxlen)
1984 return ERR_PTR(-EINVAL);
1985 if (src->len < maxlen)
1988 p = dst = kmalloc(maxlen + 1, GFP_KERNEL);
1990 return ERR_PTR(-ENOMEM);
1992 if (copy_from_user(dst, src->data, maxlen)) {
1994 return ERR_PTR(-EFAULT);
2000 static struct super_block *nfs4_get_sb(struct file_system_type *fs_type,
2001 int flags, const char *dev_name, void *raw_data)
2004 struct nfs_server *server;
2005 struct super_block *s;
2006 struct nfs4_mount_data *data = raw_data;
2010 dprintk("%s: missing data argument\n", __FUNCTION__);
2011 return ERR_PTR(-EINVAL);
2013 if (data->version <= 0 || data->version > NFS4_MOUNT_VERSION) {
2014 dprintk("%s: bad mount version\n", __FUNCTION__);
2015 return ERR_PTR(-EINVAL);
2018 server = kzalloc(sizeof(struct nfs_server), GFP_KERNEL);
2020 return ERR_PTR(-ENOMEM);
2021 /* Zero out the NFS state stuff */
2022 init_nfsv4_state(server);
2023 server->client = server->client_sys = server->client_acl = ERR_PTR(-EINVAL);
2025 p = nfs_copy_user_string(NULL, &data->hostname, 256);
2028 server->hostname = p;
2030 p = nfs_copy_user_string(NULL, &data->mnt_path, 1024);
2033 server->mnt_path = p;
2035 p = nfs_copy_user_string(server->ip_addr, &data->client_addr,
2036 sizeof(server->ip_addr) - 1);
2040 /* We now require that the mount process passes the remote address */
2041 if (data->host_addrlen != sizeof(server->addr)) {
2042 s = ERR_PTR(-EINVAL);
2045 if (copy_from_user(&server->addr, data->host_addr, sizeof(server->addr))) {
2046 s = ERR_PTR(-EFAULT);
2049 if (server->addr.sin_family != AF_INET ||
2050 server->addr.sin_addr.s_addr == INADDR_ANY) {
2051 dprintk("%s: mount program didn't pass remote IP address!\n",
2053 s = ERR_PTR(-EINVAL);
2057 /* Fire up rpciod if not yet running */
2058 s = ERR_PTR(rpciod_up());
2060 dprintk("%s: couldn't start rpciod! Error = %ld\n",
2061 __FUNCTION__, PTR_ERR(s));
2065 s = sget(fs_type, nfs4_compare_super, nfs_set_super, server);
2067 if (IS_ERR(s) || s->s_root)
2072 error = nfs4_fill_super(s, data, flags & MS_SILENT ? 1 : 0);
2074 up_write(&s->s_umount);
2075 deactivate_super(s);
2076 return ERR_PTR(error);
2078 s->s_flags |= MS_ACTIVE;
2081 s = (struct super_block *)p;
2083 kfree(server->mnt_path);
2084 kfree(server->hostname);
2089 static void nfs4_kill_super(struct super_block *sb)
2091 struct nfs_server *server = NFS_SB(sb);
2093 nfs_return_all_delegations(sb);
2094 kill_anon_super(sb);
2096 nfs4_renewd_prepare_shutdown(server);
2098 if (server->client != NULL && !IS_ERR(server->client))
2099 rpc_shutdown_client(server->client);
2101 destroy_nfsv4_state(server);
2105 nfs_free_iostats(server->io_stats);
2106 kfree(server->hostname);
2110 static struct file_system_type nfs4_fs_type = {
2111 .owner = THIS_MODULE,
2113 .get_sb = nfs4_get_sb,
2114 .kill_sb = nfs4_kill_super,
2115 .fs_flags = FS_ODD_RENAME|FS_REVAL_DOT|FS_BINARY_MOUNTDATA,
2118 static const int nfs_set_port_min = 0;
2119 static const int nfs_set_port_max = 65535;
2120 static int param_set_port(const char *val, struct kernel_param *kp)
2123 int num = simple_strtol(val, &endp, 0);
2124 if (endp == val || *endp || num < nfs_set_port_min || num > nfs_set_port_max)
2126 *((int *)kp->arg) = num;
2130 module_param_call(callback_tcpport, param_set_port, param_get_int,
2131 &nfs_callback_set_tcpport, 0644);
2133 static int param_set_idmap_timeout(const char *val, struct kernel_param *kp)
2136 int num = simple_strtol(val, &endp, 0);
2138 if (endp == val || *endp || num < 0 || jif < num)
2140 *((int *)kp->arg) = jif;
2144 module_param_call(idmap_cache_timeout, param_set_idmap_timeout, param_get_int,
2145 &nfs_idmap_cache_timeout, 0644);
2147 #define nfs4_init_once(nfsi) \
2149 INIT_LIST_HEAD(&(nfsi)->open_states); \
2150 nfsi->delegation = NULL; \
2151 nfsi->delegation_state = 0; \
2152 init_rwsem(&nfsi->rwsem); \
2155 static inline int register_nfs4fs(void)
2159 ret = nfs_register_sysctl();
2162 ret = register_filesystem(&nfs4_fs_type);
2164 nfs_unregister_sysctl();
2168 static inline void unregister_nfs4fs(void)
2170 unregister_filesystem(&nfs4_fs_type);
2171 nfs_unregister_sysctl();
2174 #define nfs4_init_once(nfsi) \
2176 #define register_nfs4fs() (0)
2177 #define unregister_nfs4fs()
2180 extern int nfs_init_nfspagecache(void);
2181 extern void nfs_destroy_nfspagecache(void);
2182 extern int nfs_init_readpagecache(void);
2183 extern void nfs_destroy_readpagecache(void);
2184 extern int nfs_init_writepagecache(void);
2185 extern void nfs_destroy_writepagecache(void);
2186 #ifdef CONFIG_NFS_DIRECTIO
2187 extern int nfs_init_directcache(void);
2188 extern void nfs_destroy_directcache(void);
2191 static kmem_cache_t * nfs_inode_cachep;
2193 static struct inode *nfs_alloc_inode(struct super_block *sb)
2195 struct nfs_inode *nfsi;
2196 nfsi = (struct nfs_inode *)kmem_cache_alloc(nfs_inode_cachep, SLAB_KERNEL);
2200 nfsi->cache_validity = 0UL;
2201 nfsi->cache_change_attribute = jiffies;
2202 #ifdef CONFIG_NFS_V3_ACL
2203 nfsi->acl_access = ERR_PTR(-EAGAIN);
2204 nfsi->acl_default = ERR_PTR(-EAGAIN);
2206 #ifdef CONFIG_NFS_V4
2207 nfsi->nfs4_acl = NULL;
2208 #endif /* CONFIG_NFS_V4 */
2209 return &nfsi->vfs_inode;
2212 static void nfs_destroy_inode(struct inode *inode)
2214 kmem_cache_free(nfs_inode_cachep, NFS_I(inode));
2217 static void init_once(void * foo, kmem_cache_t * cachep, unsigned long flags)
2219 struct nfs_inode *nfsi = (struct nfs_inode *) foo;
2221 if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) ==
2222 SLAB_CTOR_CONSTRUCTOR) {
2223 inode_init_once(&nfsi->vfs_inode);
2224 spin_lock_init(&nfsi->req_lock);
2225 INIT_LIST_HEAD(&nfsi->dirty);
2226 INIT_LIST_HEAD(&nfsi->commit);
2227 INIT_LIST_HEAD(&nfsi->open_files);
2228 INIT_RADIX_TREE(&nfsi->nfs_page_tree, GFP_ATOMIC);
2229 atomic_set(&nfsi->data_updates, 0);
2233 nfs4_init_once(nfsi);
2237 static int nfs_init_inodecache(void)
2239 nfs_inode_cachep = kmem_cache_create("nfs_inode_cache",
2240 sizeof(struct nfs_inode),
2241 0, (SLAB_RECLAIM_ACCOUNT|
2244 if (nfs_inode_cachep == NULL)
2250 static void nfs_destroy_inodecache(void)
2252 if (kmem_cache_destroy(nfs_inode_cachep))
2253 printk(KERN_INFO "nfs_inode_cache: not all structures were freed\n");
2259 static int __init init_nfs_fs(void)
2263 err = nfs_init_nfspagecache();
2267 err = nfs_init_inodecache();
2271 err = nfs_init_readpagecache();
2275 err = nfs_init_writepagecache();
2279 #ifdef CONFIG_NFS_DIRECTIO
2280 err = nfs_init_directcache();
2285 #ifdef CONFIG_PROC_FS
2286 rpc_proc_register(&nfs_rpcstat);
2288 err = register_filesystem(&nfs_fs_type);
2291 if ((err = register_nfs4fs()) != 0)
2295 #ifdef CONFIG_PROC_FS
2296 rpc_proc_unregister("nfs");
2298 #ifdef CONFIG_NFS_DIRECTIO
2299 nfs_destroy_directcache();
2302 nfs_destroy_writepagecache();
2304 nfs_destroy_readpagecache();
2306 nfs_destroy_inodecache();
2308 nfs_destroy_nfspagecache();
2313 static void __exit exit_nfs_fs(void)
2315 #ifdef CONFIG_NFS_DIRECTIO
2316 nfs_destroy_directcache();
2318 nfs_destroy_writepagecache();
2319 nfs_destroy_readpagecache();
2320 nfs_destroy_inodecache();
2321 nfs_destroy_nfspagecache();
2322 #ifdef CONFIG_PROC_FS
2323 rpc_proc_unregister("nfs");
2325 unregister_filesystem(&nfs_fs_type);
2326 unregister_nfs4fs();
2329 /* Not quite true; I just maintain it */
2330 MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>");
2331 MODULE_LICENSE("GPL");
2333 module_init(init_nfs_fs)
2334 module_exit(exit_nfs_fs)