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Merge git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
[wrt350n-kernel.git] / fs / nfs / super.c
blobf15f1eab0a9b820bede8089165784e861c9c489c
1 /*
2 * linux/fs/nfs/super.c
3 *
4 * Copyright (C) 1992 Rick Sladkey
5 *
6 * nfs superblock handling functions
7 *
8 * Modularised by Alan Cox <Alan.Cox@linux.org>, while hacking some
9 * experimental NFS changes. Modularisation taken straight from SYS5 fs.
10 *
11 * Change to nfs_read_super() to permit NFS mounts to multi-homed hosts.
12 * J.S.Peatfield@damtp.cam.ac.uk
13 *
14 * Split from inode.c by David Howells <dhowells@redhat.com>
15 *
16 * - superblocks are indexed on server only - all inodes, dentries, etc. associated with a
17 * particular server are held in the same superblock
18 * - NFS superblocks can have several effective roots to the dentry tree
19 * - directory type roots are spliced into the tree when a path from one root reaches the root
20 * of another (see nfs_lookup())
21 */
22
23 #include <linux/module.h>
24 #include <linux/init.h>
25
26 #include <linux/time.h>
27 #include <linux/kernel.h>
28 #include <linux/mm.h>
29 #include <linux/string.h>
30 #include <linux/stat.h>
31 #include <linux/errno.h>
32 #include <linux/unistd.h>
33 #include <linux/sunrpc/clnt.h>
34 #include <linux/sunrpc/stats.h>
35 #include <linux/sunrpc/metrics.h>
36 #include <linux/sunrpc/xprtsock.h>
37 #include <linux/sunrpc/xprtrdma.h>
38 #include <linux/nfs_fs.h>
39 #include <linux/nfs_mount.h>
40 #include <linux/nfs4_mount.h>
41 #include <linux/lockd/bind.h>
42 #include <linux/smp_lock.h>
43 #include <linux/seq_file.h>
44 #include <linux/mount.h>
45 #include <linux/nfs_idmap.h>
46 #include <linux/vfs.h>
47 #include <linux/inet.h>
48 #include <linux/in6.h>
49 #include <net/ipv6.h>
50 #include <linux/nfs_xdr.h>
51 #include <linux/magic.h>
52 #include <linux/parser.h>
53
54 #include <asm/system.h>
55 #include <asm/uaccess.h>
56
57 #include "nfs4_fs.h"
58 #include "callback.h"
59 #include "delegation.h"
60 #include "iostat.h"
61 #include "internal.h"
62
63 #define NFSDBG_FACILITY NFSDBG_VFS
64
65 enum {
66 /* Mount options that take no arguments */
67 Opt_soft, Opt_hard,
68 Opt_intr, Opt_nointr,
69 Opt_posix, Opt_noposix,
70 Opt_cto, Opt_nocto,
71 Opt_ac, Opt_noac,
72 Opt_lock, Opt_nolock,
73 Opt_v2, Opt_v3,
74 Opt_udp, Opt_tcp, Opt_rdma,
75 Opt_acl, Opt_noacl,
76 Opt_rdirplus, Opt_nordirplus,
77 Opt_sharecache, Opt_nosharecache,
78
79 /* Mount options that take integer arguments */
80 Opt_port,
81 Opt_rsize, Opt_wsize, Opt_bsize,
82 Opt_timeo, Opt_retrans,
83 Opt_acregmin, Opt_acregmax,
84 Opt_acdirmin, Opt_acdirmax,
85 Opt_actimeo,
86 Opt_namelen,
87 Opt_mountport,
88 Opt_mountvers,
89 Opt_nfsvers,
90
91 /* Mount options that take string arguments */
92 Opt_sec, Opt_proto, Opt_mountproto, Opt_mounthost,
93 Opt_addr, Opt_mountaddr, Opt_clientaddr,
94
95 /* Mount options that are ignored */
96 Opt_userspace, Opt_deprecated,
97
98 Opt_err
99 };
100
101 static match_table_t nfs_mount_option_tokens = {
102 { Opt_userspace, "bg" },
103 { Opt_userspace, "fg" },
104 { Opt_soft, "soft" },
105 { Opt_hard, "hard" },
106 { Opt_intr, "intr" },
107 { Opt_nointr, "nointr" },
108 { Opt_posix, "posix" },
109 { Opt_noposix, "noposix" },
110 { Opt_cto, "cto" },
111 { Opt_nocto, "nocto" },
112 { Opt_ac, "ac" },
113 { Opt_noac, "noac" },
114 { Opt_lock, "lock" },
115 { Opt_nolock, "nolock" },
116 { Opt_v2, "v2" },
117 { Opt_v3, "v3" },
118 { Opt_udp, "udp" },
119 { Opt_tcp, "tcp" },
120 { Opt_rdma, "rdma" },
121 { Opt_acl, "acl" },
122 { Opt_noacl, "noacl" },
123 { Opt_rdirplus, "rdirplus" },
124 { Opt_nordirplus, "nordirplus" },
125 { Opt_sharecache, "sharecache" },
126 { Opt_nosharecache, "nosharecache" },
127
128 { Opt_port, "port=%u" },
129 { Opt_rsize, "rsize=%u" },
130 { Opt_wsize, "wsize=%u" },
131 { Opt_bsize, "bsize=%u" },
132 { Opt_timeo, "timeo=%u" },
133 { Opt_retrans, "retrans=%u" },
134 { Opt_acregmin, "acregmin=%u" },
135 { Opt_acregmax, "acregmax=%u" },
136 { Opt_acdirmin, "acdirmin=%u" },
137 { Opt_acdirmax, "acdirmax=%u" },
138 { Opt_actimeo, "actimeo=%u" },
139 { Opt_userspace, "retry=%u" },
140 { Opt_namelen, "namlen=%u" },
141 { Opt_mountport, "mountport=%u" },
142 { Opt_mountvers, "mountvers=%u" },
143 { Opt_nfsvers, "nfsvers=%u" },
144 { Opt_nfsvers, "vers=%u" },
145
146 { Opt_sec, "sec=%s" },
147 { Opt_proto, "proto=%s" },
148 { Opt_mountproto, "mountproto=%s" },
149 { Opt_addr, "addr=%s" },
150 { Opt_clientaddr, "clientaddr=%s" },
151 { Opt_mounthost, "mounthost=%s" },
152 { Opt_mountaddr, "mountaddr=%s" },
153
154 { Opt_err, NULL }
155 };
156
157 enum {
158 Opt_xprt_udp, Opt_xprt_tcp, Opt_xprt_rdma,
159
160 Opt_xprt_err
161 };
162
163 static match_table_t nfs_xprt_protocol_tokens = {
164 { Opt_xprt_udp, "udp" },
165 { Opt_xprt_tcp, "tcp" },
166 { Opt_xprt_rdma, "rdma" },
167
168 { Opt_xprt_err, NULL }
169 };
170
171 enum {
172 Opt_sec_none, Opt_sec_sys,
173 Opt_sec_krb5, Opt_sec_krb5i, Opt_sec_krb5p,
174 Opt_sec_lkey, Opt_sec_lkeyi, Opt_sec_lkeyp,
175 Opt_sec_spkm, Opt_sec_spkmi, Opt_sec_spkmp,
176
177 Opt_sec_err
178 };
179
180 static match_table_t nfs_secflavor_tokens = {
181 { Opt_sec_none, "none" },
182 { Opt_sec_none, "null" },
183 { Opt_sec_sys, "sys" },
184
185 { Opt_sec_krb5, "krb5" },
186 { Opt_sec_krb5i, "krb5i" },
187 { Opt_sec_krb5p, "krb5p" },
188
189 { Opt_sec_lkey, "lkey" },
190 { Opt_sec_lkeyi, "lkeyi" },
191 { Opt_sec_lkeyp, "lkeyp" },
192
193 { Opt_sec_spkm, "spkm3" },
194 { Opt_sec_spkmi, "spkm3i" },
195 { Opt_sec_spkmp, "spkm3p" },
196
197 { Opt_sec_err, NULL }
198 };
199
200
201 static void nfs_umount_begin(struct vfsmount *, int);
202 static int nfs_statfs(struct dentry *, struct kstatfs *);
203 static int nfs_show_options(struct seq_file *, struct vfsmount *);
204 static int nfs_show_stats(struct seq_file *, struct vfsmount *);
205 static int nfs_get_sb(struct file_system_type *, int, const char *, void *, struct vfsmount *);
206 static int nfs_xdev_get_sb(struct file_system_type *fs_type,
207 int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt);
208 static void nfs_kill_super(struct super_block *);
209 static void nfs_put_super(struct super_block *);
210
211 static struct file_system_type nfs_fs_type = {
212 .owner = THIS_MODULE,
213 .name = "nfs",
214 .get_sb = nfs_get_sb,
215 .kill_sb = nfs_kill_super,
216 .fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA,
217 };
218
219 struct file_system_type nfs_xdev_fs_type = {
220 .owner = THIS_MODULE,
221 .name = "nfs",
222 .get_sb = nfs_xdev_get_sb,
223 .kill_sb = nfs_kill_super,
224 .fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA,
225 };
226
227 static const struct super_operations nfs_sops = {
228 .alloc_inode = nfs_alloc_inode,
229 .destroy_inode = nfs_destroy_inode,
230 .write_inode = nfs_write_inode,
231 .put_super = nfs_put_super,
232 .statfs = nfs_statfs,
233 .clear_inode = nfs_clear_inode,
234 .umount_begin = nfs_umount_begin,
235 .show_options = nfs_show_options,
236 .show_stats = nfs_show_stats,
237 };
238
239 #ifdef CONFIG_NFS_V4
240 static int nfs4_get_sb(struct file_system_type *fs_type,
241 int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt);
242 static int nfs4_xdev_get_sb(struct file_system_type *fs_type,
243 int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt);
244 static int nfs4_referral_get_sb(struct file_system_type *fs_type,
245 int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt);
246 static void nfs4_kill_super(struct super_block *sb);
247
248 static struct file_system_type nfs4_fs_type = {
249 .owner = THIS_MODULE,
250 .name = "nfs4",
251 .get_sb = nfs4_get_sb,
252 .kill_sb = nfs4_kill_super,
253 .fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA,
254 };
255
256 struct file_system_type nfs4_xdev_fs_type = {
257 .owner = THIS_MODULE,
258 .name = "nfs4",
259 .get_sb = nfs4_xdev_get_sb,
260 .kill_sb = nfs4_kill_super,
261 .fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA,
262 };
263
264 struct file_system_type nfs4_referral_fs_type = {
265 .owner = THIS_MODULE,
266 .name = "nfs4",
267 .get_sb = nfs4_referral_get_sb,
268 .kill_sb = nfs4_kill_super,
269 .fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA,
270 };
271
272 static const struct super_operations nfs4_sops = {
273 .alloc_inode = nfs_alloc_inode,
274 .destroy_inode = nfs_destroy_inode,
275 .write_inode = nfs_write_inode,
276 .statfs = nfs_statfs,
277 .clear_inode = nfs4_clear_inode,
278 .umount_begin = nfs_umount_begin,
279 .show_options = nfs_show_options,
280 .show_stats = nfs_show_stats,
281 };
282 #endif
283
284 static struct shrinker acl_shrinker = {
285 .shrink = nfs_access_cache_shrinker,
286 .seeks = DEFAULT_SEEKS,
287 };
288
289 /*
290 * Register the NFS filesystems
291 */
292 int __init register_nfs_fs(void)
293 {
294 int ret;
295
296 ret = register_filesystem(&nfs_fs_type);
297 if (ret < 0)
298 goto error_0;
299
300 ret = nfs_register_sysctl();
301 if (ret < 0)
302 goto error_1;
303 #ifdef CONFIG_NFS_V4
304 ret = register_filesystem(&nfs4_fs_type);
305 if (ret < 0)
306 goto error_2;
307 #endif
308 register_shrinker(&acl_shrinker);
309 return 0;
310
311 #ifdef CONFIG_NFS_V4
312 error_2:
313 nfs_unregister_sysctl();
314 #endif
315 error_1:
316 unregister_filesystem(&nfs_fs_type);
317 error_0:
318 return ret;
319 }
320
321 /*
322 * Unregister the NFS filesystems
323 */
324 void __exit unregister_nfs_fs(void)
325 {
326 unregister_shrinker(&acl_shrinker);
327 #ifdef CONFIG_NFS_V4
328 unregister_filesystem(&nfs4_fs_type);
329 #endif
330 nfs_unregister_sysctl();
331 unregister_filesystem(&nfs_fs_type);
332 }
333
334 void nfs_sb_active(struct nfs_server *server)
335 {
336 atomic_inc(&server->active);
337 }
338
339 void nfs_sb_deactive(struct nfs_server *server)
340 {
341 if (atomic_dec_and_test(&server->active))
342 wake_up(&server->active_wq);
343 }
344
345 static void nfs_put_super(struct super_block *sb)
346 {
347 struct nfs_server *server = NFS_SB(sb);
348 /*
349 * Make sure there are no outstanding ops to this server.
350 * If so, wait for them to finish before allowing the
351 * unmount to continue.
352 */
353 wait_event(server->active_wq, atomic_read(&server->active) == 0);
354 }
355
356 /*
357 * Deliver file system statistics to userspace
358 */
359 static int nfs_statfs(struct dentry *dentry, struct kstatfs *buf)
360 {
361 struct nfs_server *server = NFS_SB(dentry->d_sb);
362 unsigned char blockbits;
363 unsigned long blockres;
364 struct nfs_fh *fh = NFS_FH(dentry->d_inode);
365 struct nfs_fattr fattr;
366 struct nfs_fsstat res = {
367 .fattr = &fattr,
368 };
369 int error;
370
371 lock_kernel();
372
373 error = server->nfs_client->rpc_ops->statfs(server, fh, &res);
374 if (error < 0)
375 goto out_err;
376 buf->f_type = NFS_SUPER_MAGIC;
377
378 /*
379 * Current versions of glibc do not correctly handle the
380 * case where f_frsize != f_bsize. Eventually we want to
381 * report the value of wtmult in this field.
382 */
383 buf->f_frsize = dentry->d_sb->s_blocksize;
384
385 /*
386 * On most *nix systems, f_blocks, f_bfree, and f_bavail
387 * are reported in units of f_frsize. Linux hasn't had
388 * an f_frsize field in its statfs struct until recently,
389 * thus historically Linux's sys_statfs reports these
390 * fields in units of f_bsize.
391 */
392 buf->f_bsize = dentry->d_sb->s_blocksize;
393 blockbits = dentry->d_sb->s_blocksize_bits;
394 blockres = (1 << blockbits) - 1;
395 buf->f_blocks = (res.tbytes + blockres) >> blockbits;
396 buf->f_bfree = (res.fbytes + blockres) >> blockbits;
397 buf->f_bavail = (res.abytes + blockres) >> blockbits;
398
399 buf->f_files = res.tfiles;
400 buf->f_ffree = res.afiles;
401
402 buf->f_namelen = server->namelen;
403
404 unlock_kernel();
405 return 0;
406
407 out_err:
408 dprintk("%s: statfs error = %d\n", __FUNCTION__, -error);
409 unlock_kernel();
410 return error;
411 }
412
413 /*
414 * Map the security flavour number to a name
415 */
416 static const char *nfs_pseudoflavour_to_name(rpc_authflavor_t flavour)
417 {
418 static const struct {
419 rpc_authflavor_t flavour;
420 const char *str;
421 } sec_flavours[] = {
422 { RPC_AUTH_NULL, "null" },
423 { RPC_AUTH_UNIX, "sys" },
424 { RPC_AUTH_GSS_KRB5, "krb5" },
425 { RPC_AUTH_GSS_KRB5I, "krb5i" },
426 { RPC_AUTH_GSS_KRB5P, "krb5p" },
427 { RPC_AUTH_GSS_LKEY, "lkey" },
428 { RPC_AUTH_GSS_LKEYI, "lkeyi" },
429 { RPC_AUTH_GSS_LKEYP, "lkeyp" },
430 { RPC_AUTH_GSS_SPKM, "spkm" },
431 { RPC_AUTH_GSS_SPKMI, "spkmi" },
432 { RPC_AUTH_GSS_SPKMP, "spkmp" },
433 { UINT_MAX, "unknown" }
434 };
435 int i;
436
437 for (i = 0; sec_flavours[i].flavour != UINT_MAX; i++) {
438 if (sec_flavours[i].flavour == flavour)
439 break;
440 }
441 return sec_flavours[i].str;
442 }
443
444 /*
445 * Describe the mount options in force on this server representation
446 */
447 static void nfs_show_mount_options(struct seq_file *m, struct nfs_server *nfss, int showdefaults)
448 {
449 static const struct proc_nfs_info {
450 int flag;
451 const char *str;
452 const char *nostr;
453 } nfs_info[] = {
454 { NFS_MOUNT_SOFT, ",soft", ",hard" },
455 { NFS_MOUNT_NOCTO, ",nocto", "" },
456 { NFS_MOUNT_NOAC, ",noac", "" },
457 { NFS_MOUNT_NONLM, ",nolock", "" },
458 { NFS_MOUNT_NOACL, ",noacl", "" },
459 { NFS_MOUNT_NORDIRPLUS, ",nordirplus", "" },
460 { NFS_MOUNT_UNSHARED, ",nosharecache", ""},
461 { 0, NULL, NULL }
462 };
463 const struct proc_nfs_info *nfs_infop;
464 struct nfs_client *clp = nfss->nfs_client;
465
466 seq_printf(m, ",vers=%d", clp->rpc_ops->version);
467 seq_printf(m, ",rsize=%d", nfss->rsize);
468 seq_printf(m, ",wsize=%d", nfss->wsize);
469 if (nfss->acregmin != 3*HZ || showdefaults)
470 seq_printf(m, ",acregmin=%d", nfss->acregmin/HZ);
471 if (nfss->acregmax != 60*HZ || showdefaults)
472 seq_printf(m, ",acregmax=%d", nfss->acregmax/HZ);
473 if (nfss->acdirmin != 30*HZ || showdefaults)
474 seq_printf(m, ",acdirmin=%d", nfss->acdirmin/HZ);
475 if (nfss->acdirmax != 60*HZ || showdefaults)
476 seq_printf(m, ",acdirmax=%d", nfss->acdirmax/HZ);
477 for (nfs_infop = nfs_info; nfs_infop->flag; nfs_infop++) {
478 if (nfss->flags & nfs_infop->flag)
479 seq_puts(m, nfs_infop->str);
480 else
481 seq_puts(m, nfs_infop->nostr);
482 }
483 seq_printf(m, ",proto=%s",
484 rpc_peeraddr2str(nfss->client, RPC_DISPLAY_PROTO));
485 seq_printf(m, ",timeo=%lu", 10U * nfss->client->cl_timeout->to_initval / HZ);
486 seq_printf(m, ",retrans=%u", nfss->client->cl_timeout->to_retries);
487 seq_printf(m, ",sec=%s", nfs_pseudoflavour_to_name(nfss->client->cl_auth->au_flavor));
488 }
489
490 /*
491 * Describe the mount options on this VFS mountpoint
492 */
493 static int nfs_show_options(struct seq_file *m, struct vfsmount *mnt)
494 {
495 struct nfs_server *nfss = NFS_SB(mnt->mnt_sb);
496
497 nfs_show_mount_options(m, nfss, 0);
498
499 seq_printf(m, ",addr=%s",
500 rpc_peeraddr2str(nfss->nfs_client->cl_rpcclient,
501 RPC_DISPLAY_ADDR));
502
503 return 0;
504 }
505
506 /*
507 * Present statistical information for this VFS mountpoint
508 */
509 static int nfs_show_stats(struct seq_file *m, struct vfsmount *mnt)
510 {
511 int i, cpu;
512 struct nfs_server *nfss = NFS_SB(mnt->mnt_sb);
513 struct rpc_auth *auth = nfss->client->cl_auth;
514 struct nfs_iostats totals = { };
515
516 seq_printf(m, "statvers=%s", NFS_IOSTAT_VERS);
517
518 /*
519 * Display all mount option settings
520 */
521 seq_printf(m, "\n\topts:\t");
522 seq_puts(m, mnt->mnt_sb->s_flags & MS_RDONLY ? "ro" : "rw");
523 seq_puts(m, mnt->mnt_sb->s_flags & MS_SYNCHRONOUS ? ",sync" : "");
524 seq_puts(m, mnt->mnt_sb->s_flags & MS_NOATIME ? ",noatime" : "");
525 seq_puts(m, mnt->mnt_sb->s_flags & MS_NODIRATIME ? ",nodiratime" : "");
526 nfs_show_mount_options(m, nfss, 1);
527
528 seq_printf(m, "\n\tage:\t%lu", (jiffies - nfss->mount_time) / HZ);
529
530 seq_printf(m, "\n\tcaps:\t");
531 seq_printf(m, "caps=0x%x", nfss->caps);
532 seq_printf(m, ",wtmult=%d", nfss->wtmult);
533 seq_printf(m, ",dtsize=%d", nfss->dtsize);
534 seq_printf(m, ",bsize=%d", nfss->bsize);
535 seq_printf(m, ",namelen=%d", nfss->namelen);
536
537 #ifdef CONFIG_NFS_V4
538 if (nfss->nfs_client->rpc_ops->version == 4) {
539 seq_printf(m, "\n\tnfsv4:\t");
540 seq_printf(m, "bm0=0x%x", nfss->attr_bitmask[0]);
541 seq_printf(m, ",bm1=0x%x", nfss->attr_bitmask[1]);
542 seq_printf(m, ",acl=0x%x", nfss->acl_bitmask);
543 }
544 #endif
545
546 /*
547 * Display security flavor in effect for this mount
548 */
549 seq_printf(m, "\n\tsec:\tflavor=%d", auth->au_ops->au_flavor);
550 if (auth->au_flavor)
551 seq_printf(m, ",pseudoflavor=%d", auth->au_flavor);
552
553 /*
554 * Display superblock I/O counters
555 */
556 for_each_possible_cpu(cpu) {
557 struct nfs_iostats *stats;
558
559 preempt_disable();
560 stats = per_cpu_ptr(nfss->io_stats, cpu);
561
562 for (i = 0; i < __NFSIOS_COUNTSMAX; i++)
563 totals.events[i] += stats->events[i];
564 for (i = 0; i < __NFSIOS_BYTESMAX; i++)
565 totals.bytes[i] += stats->bytes[i];
566
567 preempt_enable();
568 }
569
570 seq_printf(m, "\n\tevents:\t");
571 for (i = 0; i < __NFSIOS_COUNTSMAX; i++)
572 seq_printf(m, "%lu ", totals.events[i]);
573 seq_printf(m, "\n\tbytes:\t");
574 for (i = 0; i < __NFSIOS_BYTESMAX; i++)
575 seq_printf(m, "%Lu ", totals.bytes[i]);
576 seq_printf(m, "\n");
577
578 rpc_print_iostats(m, nfss->client);
579
580 return 0;
581 }
582
583 /*
584 * Begin unmount by attempting to remove all automounted mountpoints we added
585 * in response to xdev traversals and referrals
586 */
587 static void nfs_umount_begin(struct vfsmount *vfsmnt, int flags)
588 {
589 struct nfs_server *server = NFS_SB(vfsmnt->mnt_sb);
590 struct rpc_clnt *rpc;
591
592 shrink_submounts(vfsmnt, &nfs_automount_list);
593
594 if (!(flags & MNT_FORCE))
595 return;
596 /* -EIO all pending I/O */
597 rpc = server->client_acl;
598 if (!IS_ERR(rpc))
599 rpc_killall_tasks(rpc);
600 rpc = server->client;
601 if (!IS_ERR(rpc))
602 rpc_killall_tasks(rpc);
603 }
604
605 /*
606 * Set the port number in an address. Be agnostic about the address family.
607 */
608 static void nfs_set_port(struct sockaddr *sap, unsigned short port)
609 {
610 switch (sap->sa_family) {
611 case AF_INET: {
612 struct sockaddr_in *ap = (struct sockaddr_in *)sap;
613 ap->sin_port = htons(port);
614 break;
615 }
616 case AF_INET6: {
617 struct sockaddr_in6 *ap = (struct sockaddr_in6 *)sap;
618 ap->sin6_port = htons(port);
619 break;
620 }
621 }
622 }
623
624 /*
625 * Sanity-check a server address provided by the mount command.
626 *
627 * Address family must be initialized, and address must not be
628 * the ANY address for that family.
629 */
630 static int nfs_verify_server_address(struct sockaddr *addr)
631 {
632 switch (addr->sa_family) {
633 case AF_INET: {
634 struct sockaddr_in *sa = (struct sockaddr_in *)addr;
635 return sa->sin_addr.s_addr != INADDR_ANY;
636 }
637 case AF_INET6: {
638 struct in6_addr *sa = &((struct sockaddr_in6 *)addr)->sin6_addr;
639 return !ipv6_addr_any(sa);
640 }
641 }
642
643 return 0;
644 }
645
646 /*
647 * Parse string addresses passed in via a mount option,
648 * and construct a sockaddr based on the result.
649 *
650 * If address parsing fails, set the sockaddr's address
651 * family to AF_UNSPEC to force nfs_verify_server_address()
652 * to punt the mount.
653 */
654 static void nfs_parse_server_address(char *value,
655 struct sockaddr *sap,
656 size_t *len)
657 {
658 if (strchr(value, ':')) {
659 struct sockaddr_in6 *ap = (struct sockaddr_in6 *)sap;
660 u8 *addr = (u8 *)&ap->sin6_addr.in6_u;
661
662 ap->sin6_family = AF_INET6;
663 *len = sizeof(*ap);
664 if (in6_pton(value, -1, addr, '\0', NULL))
665 return;
666 } else {
667 struct sockaddr_in *ap = (struct sockaddr_in *)sap;
668 u8 *addr = (u8 *)&ap->sin_addr.s_addr;
669
670 ap->sin_family = AF_INET;
671 *len = sizeof(*ap);
672 if (in4_pton(value, -1, addr, '\0', NULL))
673 return;
674 }
675
676 sap->sa_family = AF_UNSPEC;
677 *len = 0;
678 }
679
680 /*
681 * Error-check and convert a string of mount options from user space into
682 * a data structure
683 */
684 static int nfs_parse_mount_options(char *raw,
685 struct nfs_parsed_mount_data *mnt)
686 {
687 <<<<<<< HEAD:fs/nfs/super.c
688 char *p, *string;
689 =======
690 char *p, *string, *secdata;
691 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a:fs/nfs/super.c
692 unsigned short port = 0;
693 <<<<<<< HEAD:fs/nfs/super.c
694 =======
695 int rc;
696 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a:fs/nfs/super.c
697
698 if (!raw) {
699 dfprintk(MOUNT, "NFS: mount options string was NULL.\n");
700 return 1;
701 }
702 dfprintk(MOUNT, "NFS: nfs mount opts='%s'\n", raw);
703
704 <<<<<<< HEAD:fs/nfs/super.c
705 =======
706 secdata = alloc_secdata();
707 if (!secdata)
708 goto out_nomem;
709
710 rc = security_sb_copy_data(raw, secdata);
711 if (rc)
712 goto out_security_failure;
713
714 rc = security_sb_parse_opts_str(secdata, &mnt->lsm_opts);
715 if (rc)
716 goto out_security_failure;
717
718 free_secdata(secdata);
719
720 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a:fs/nfs/super.c
721 while ((p = strsep(&raw, ",")) != NULL) {
722 substring_t args[MAX_OPT_ARGS];
723 int option, token;
724
725 if (!*p)
726 continue;
727
728 dfprintk(MOUNT, "NFS: parsing nfs mount option '%s'\n", p);
729
730 token = match_token(p, nfs_mount_option_tokens, args);
731 switch (token) {
732 case Opt_soft:
733 mnt->flags |= NFS_MOUNT_SOFT;
734 break;
735 case Opt_hard:
736 mnt->flags &= ~NFS_MOUNT_SOFT;
737 break;
738 case Opt_intr:
739 case Opt_nointr:
740 break;
741 case Opt_posix:
742 mnt->flags |= NFS_MOUNT_POSIX;
743 break;
744 case Opt_noposix:
745 mnt->flags &= ~NFS_MOUNT_POSIX;
746 break;
747 case Opt_cto:
748 mnt->flags &= ~NFS_MOUNT_NOCTO;
749 break;
750 case Opt_nocto:
751 mnt->flags |= NFS_MOUNT_NOCTO;
752 break;
753 case Opt_ac:
754 mnt->flags &= ~NFS_MOUNT_NOAC;
755 break;
756 case Opt_noac:
757 mnt->flags |= NFS_MOUNT_NOAC;
758 break;
759 case Opt_lock:
760 mnt->flags &= ~NFS_MOUNT_NONLM;
761 break;
762 case Opt_nolock:
763 mnt->flags |= NFS_MOUNT_NONLM;
764 break;
765 case Opt_v2:
766 mnt->flags &= ~NFS_MOUNT_VER3;
767 break;
768 case Opt_v3:
769 mnt->flags |= NFS_MOUNT_VER3;
770 break;
771 case Opt_udp:
772 mnt->flags &= ~NFS_MOUNT_TCP;
773 mnt->nfs_server.protocol = XPRT_TRANSPORT_UDP;
774 mnt->timeo = 7;
775 mnt->retrans = 5;
776 break;
777 case Opt_tcp:
778 mnt->flags |= NFS_MOUNT_TCP;
779 mnt->nfs_server.protocol = XPRT_TRANSPORT_TCP;
780 mnt->timeo = 600;
781 mnt->retrans = 2;
782 break;
783 case Opt_rdma:
784 mnt->flags |= NFS_MOUNT_TCP; /* for side protocols */
785 mnt->nfs_server.protocol = XPRT_TRANSPORT_RDMA;
786 mnt->timeo = 600;
787 mnt->retrans = 2;
788 break;
789 case Opt_acl:
790 mnt->flags &= ~NFS_MOUNT_NOACL;
791 break;
792 case Opt_noacl:
793 mnt->flags |= NFS_MOUNT_NOACL;
794 break;
795 case Opt_rdirplus:
796 mnt->flags &= ~NFS_MOUNT_NORDIRPLUS;
797 break;
798 case Opt_nordirplus:
799 mnt->flags |= NFS_MOUNT_NORDIRPLUS;
800 break;
801 case Opt_sharecache:
802 mnt->flags &= ~NFS_MOUNT_UNSHARED;
803 break;
804 case Opt_nosharecache:
805 mnt->flags |= NFS_MOUNT_UNSHARED;
806 break;
807
808 case Opt_port:
809 if (match_int(args, &option))
810 return 0;
811 if (option < 0 || option > 65535)
812 return 0;
813 port = option;
814 break;
815 case Opt_rsize:
816 if (match_int(args, &mnt->rsize))
817 return 0;
818 break;
819 case Opt_wsize:
820 if (match_int(args, &mnt->wsize))
821 return 0;
822 break;
823 case Opt_bsize:
824 if (match_int(args, &option))
825 return 0;
826 if (option < 0)
827 return 0;
828 mnt->bsize = option;
829 break;
830 case Opt_timeo:
831 if (match_int(args, &mnt->timeo))
832 return 0;
833 break;
834 case Opt_retrans:
835 if (match_int(args, &mnt->retrans))
836 return 0;
837 break;
838 case Opt_acregmin:
839 if (match_int(args, &mnt->acregmin))
840 return 0;
841 break;
842 case Opt_acregmax:
843 if (match_int(args, &mnt->acregmax))
844 return 0;
845 break;
846 case Opt_acdirmin:
847 if (match_int(args, &mnt->acdirmin))
848 return 0;
849 break;
850 case Opt_acdirmax:
851 if (match_int(args, &mnt->acdirmax))
852 return 0;
853 break;
854 case Opt_actimeo:
855 if (match_int(args, &option))
856 return 0;
857 if (option < 0)
858 return 0;
859 mnt->acregmin =
860 mnt->acregmax =
861 mnt->acdirmin =
862 mnt->acdirmax = option;
863 break;
864 case Opt_namelen:
865 if (match_int(args, &mnt->namlen))
866 return 0;
867 break;
868 case Opt_mountport:
869 if (match_int(args, &option))
870 return 0;
871 if (option < 0 || option > 65535)
872 return 0;
873 mnt->mount_server.port = option;
874 break;
875 case Opt_mountvers:
876 if (match_int(args, &option))
877 return 0;
878 if (option < 0)
879 return 0;
880 mnt->mount_server.version = option;
881 break;
882 case Opt_nfsvers:
883 if (match_int(args, &option))
884 return 0;
885 switch (option) {
886 case 2:
887 mnt->flags &= ~NFS_MOUNT_VER3;
888 break;
889 case 3:
890 mnt->flags |= NFS_MOUNT_VER3;
891 break;
892 default:
893 goto out_unrec_vers;
894 }
895 break;
896
897 case Opt_sec:
898 string = match_strdup(args);
899 if (string == NULL)
900 goto out_nomem;
901 token = match_token(string, nfs_secflavor_tokens, args);
902 kfree(string);
903
904 /*
905 * The flags setting is for v2/v3. The flavor_len
906 * setting is for v4. v2/v3 also need to know the
907 * difference between NULL and UNIX.
908 */
909 switch (token) {
910 case Opt_sec_none:
911 mnt->flags &= ~NFS_MOUNT_SECFLAVOUR;
912 mnt->auth_flavor_len = 0;
913 mnt->auth_flavors[0] = RPC_AUTH_NULL;
914 break;
915 case Opt_sec_sys:
916 mnt->flags &= ~NFS_MOUNT_SECFLAVOUR;
917 mnt->auth_flavor_len = 0;
918 mnt->auth_flavors[0] = RPC_AUTH_UNIX;
919 break;
920 case Opt_sec_krb5:
921 mnt->flags |= NFS_MOUNT_SECFLAVOUR;
922 mnt->auth_flavor_len = 1;
923 mnt->auth_flavors[0] = RPC_AUTH_GSS_KRB5;
924 break;
925 case Opt_sec_krb5i:
926 mnt->flags |= NFS_MOUNT_SECFLAVOUR;
927 mnt->auth_flavor_len = 1;
928 mnt->auth_flavors[0] = RPC_AUTH_GSS_KRB5I;
929 break;
930 case Opt_sec_krb5p:
931 mnt->flags |= NFS_MOUNT_SECFLAVOUR;
932 mnt->auth_flavor_len = 1;
933 mnt->auth_flavors[0] = RPC_AUTH_GSS_KRB5P;
934 break;
935 case Opt_sec_lkey:
936 mnt->flags |= NFS_MOUNT_SECFLAVOUR;
937 mnt->auth_flavor_len = 1;
938 mnt->auth_flavors[0] = RPC_AUTH_GSS_LKEY;
939 break;
940 case Opt_sec_lkeyi:
941 mnt->flags |= NFS_MOUNT_SECFLAVOUR;
942 mnt->auth_flavor_len = 1;
943 mnt->auth_flavors[0] = RPC_AUTH_GSS_LKEYI;
944 break;
945 case Opt_sec_lkeyp:
946 mnt->flags |= NFS_MOUNT_SECFLAVOUR;
947 mnt->auth_flavor_len = 1;
948 mnt->auth_flavors[0] = RPC_AUTH_GSS_LKEYP;
949 break;
950 case Opt_sec_spkm:
951 mnt->flags |= NFS_MOUNT_SECFLAVOUR;
952 mnt->auth_flavor_len = 1;
953 mnt->auth_flavors[0] = RPC_AUTH_GSS_SPKM;
954 break;
955 case Opt_sec_spkmi:
956 mnt->flags |= NFS_MOUNT_SECFLAVOUR;
957 mnt->auth_flavor_len = 1;
958 mnt->auth_flavors[0] = RPC_AUTH_GSS_SPKMI;
959 break;
960 case Opt_sec_spkmp:
961 mnt->flags |= NFS_MOUNT_SECFLAVOUR;
962 mnt->auth_flavor_len = 1;
963 mnt->auth_flavors[0] = RPC_AUTH_GSS_SPKMP;
964 break;
965 default:
966 goto out_unrec_sec;
967 }
968 break;
969 case Opt_proto:
970 string = match_strdup(args);
971 if (string == NULL)
972 goto out_nomem;
973 token = match_token(string,
974 nfs_xprt_protocol_tokens, args);
975 kfree(string);
976
977 switch (token) {
978 case Opt_xprt_udp:
979 mnt->flags &= ~NFS_MOUNT_TCP;
980 mnt->nfs_server.protocol = XPRT_TRANSPORT_UDP;
981 mnt->timeo = 7;
982 mnt->retrans = 5;
983 break;
984 case Opt_xprt_tcp:
985 mnt->flags |= NFS_MOUNT_TCP;
986 mnt->nfs_server.protocol = XPRT_TRANSPORT_TCP;
987 mnt->timeo = 600;
988 mnt->retrans = 2;
989 break;
990 case Opt_xprt_rdma:
991 /* vector side protocols to TCP */
992 mnt->flags |= NFS_MOUNT_TCP;
993 mnt->nfs_server.protocol = XPRT_TRANSPORT_RDMA;
994 mnt->timeo = 600;
995 mnt->retrans = 2;
996 break;
997 default:
998 goto out_unrec_xprt;
999 }
1000 break;
1001 case Opt_mountproto:
1002 string = match_strdup(args);
1003 if (string == NULL)
1004 goto out_nomem;
1005 token = match_token(string,
1006 nfs_xprt_protocol_tokens, args);
1007 kfree(string);
1008
1009 switch (token) {
1010 case Opt_xprt_udp:
1011 mnt->mount_server.protocol = XPRT_TRANSPORT_UDP;
1012 break;
1013 case Opt_xprt_tcp:
1014 mnt->mount_server.protocol = XPRT_TRANSPORT_TCP;
1015 break;
1016 case Opt_xprt_rdma: /* not used for side protocols */
1017 default:
1018 goto out_unrec_xprt;
1019 }
1020 break;
1021 case Opt_addr:
1022 string = match_strdup(args);
1023 if (string == NULL)
1024 goto out_nomem;
1025 nfs_parse_server_address(string, (struct sockaddr *)
1026 &mnt->nfs_server.address,
1027 &mnt->nfs_server.addrlen);
1028 kfree(string);
1029 break;
1030 case Opt_clientaddr:
1031 string = match_strdup(args);
1032 if (string == NULL)
1033 goto out_nomem;
1034 kfree(mnt->client_address);
1035 mnt->client_address = string;
1036 break;
1037 case Opt_mounthost:
1038 string = match_strdup(args);
1039 if (string == NULL)
1040 goto out_nomem;
1041 kfree(mnt->mount_server.hostname);
1042 mnt->mount_server.hostname = string;
1043 break;
1044 case Opt_mountaddr:
1045 string = match_strdup(args);
1046 if (string == NULL)
1047 goto out_nomem;
1048 nfs_parse_server_address(string, (struct sockaddr *)
1049 &mnt->mount_server.address,
1050 &mnt->mount_server.addrlen);
1051 kfree(string);
1052 break;
1053
1054 case Opt_userspace:
1055 case Opt_deprecated:
1056 break;
1057
1058 default:
1059 goto out_unknown;
1060 }
1061 }
1062
1063 nfs_set_port((struct sockaddr *)&mnt->nfs_server.address, port);
1064
1065 return 1;
1066
1067 out_nomem:
1068 printk(KERN_INFO "NFS: not enough memory to parse option\n");
1069 return 0;
1070 <<<<<<< HEAD:fs/nfs/super.c
1071
1072 =======
1073 out_security_failure:
1074 free_secdata(secdata);
1075 printk(KERN_INFO "NFS: security options invalid: %d\n", rc);
1076 return 0;
1077 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a:fs/nfs/super.c
1078 out_unrec_vers:
1079 printk(KERN_INFO "NFS: unrecognized NFS version number\n");
1080 return 0;
1081
1082 out_unrec_xprt:
1083 printk(KERN_INFO "NFS: unrecognized transport protocol\n");
1084 return 0;
1085
1086 out_unrec_sec:
1087 printk(KERN_INFO "NFS: unrecognized security flavor\n");
1088 return 0;
1089
1090 out_unknown:
1091 printk(KERN_INFO "NFS: unknown mount option: %s\n", p);
1092 return 0;
1093 }
1094
1095 /*
1096 * Use the remote server's MOUNT service to request the NFS file handle
1097 * corresponding to the provided path.
1098 */
1099 static int nfs_try_mount(struct nfs_parsed_mount_data *args,
1100 struct nfs_fh *root_fh)
1101 {
1102 struct sockaddr *sap = (struct sockaddr *)&args->mount_server.address;
1103 char *hostname;
1104 int status;
1105
1106 if (args->mount_server.version == 0) {
1107 if (args->flags & NFS_MOUNT_VER3)
1108 args->mount_server.version = NFS_MNT3_VERSION;
1109 else
1110 args->mount_server.version = NFS_MNT_VERSION;
1111 }
1112
1113 if (args->mount_server.hostname)
1114 hostname = args->mount_server.hostname;
1115 else
1116 hostname = args->nfs_server.hostname;
1117
1118 /*
1119 * Construct the mount server's address.
1120 */
1121 if (args->mount_server.address.ss_family == AF_UNSPEC) {
1122 memcpy(sap, &args->nfs_server.address,
1123 args->nfs_server.addrlen);
1124 args->mount_server.addrlen = args->nfs_server.addrlen;
1125 }
1126
1127 /*
1128 * autobind will be used if mount_server.port == 0
1129 */
1130 nfs_set_port(sap, args->mount_server.port);
1131
1132 /*
1133 * Now ask the mount server to map our export path
1134 * to a file handle.
1135 */
1136 status = nfs_mount(sap,
1137 args->mount_server.addrlen,
1138 hostname,
1139 args->nfs_server.export_path,
1140 args->mount_server.version,
1141 args->mount_server.protocol,
1142 root_fh);
1143 if (status == 0)
1144 return 0;
1145
1146 dfprintk(MOUNT, "NFS: unable to mount server %s, error %d",
1147 hostname, status);
1148 return status;
1149 }
1150
1151 /*
1152 * Validate the NFS2/NFS3 mount data
1153 * - fills in the mount root filehandle
1154 *
1155 * For option strings, user space handles the following behaviors:
1156 *
1157 * + DNS: mapping server host name to IP address ("addr=" option)
1158 *
1159 * + failure mode: how to behave if a mount request can't be handled
1160 * immediately ("fg/bg" option)
1161 *
1162 * + retry: how often to retry a mount request ("retry=" option)
1163 *
1164 * + breaking back: trying proto=udp after proto=tcp, v2 after v3,
1165 * mountproto=tcp after mountproto=udp, and so on
1166 */
1167 static int nfs_validate_mount_data(void *options,
1168 struct nfs_parsed_mount_data *args,
1169 struct nfs_fh *mntfh,
1170 const char *dev_name)
1171 {
1172 struct nfs_mount_data *data = (struct nfs_mount_data *)options;
1173
1174 memset(args, 0, sizeof(*args));
1175
1176 if (data == NULL)
1177 goto out_no_data;
1178
1179 args->flags = (NFS_MOUNT_VER3 | NFS_MOUNT_TCP);
1180 args->rsize = NFS_MAX_FILE_IO_SIZE;
1181 args->wsize = NFS_MAX_FILE_IO_SIZE;
1182 args->timeo = 600;
1183 args->retrans = 2;
1184 args->acregmin = 3;
1185 args->acregmax = 60;
1186 args->acdirmin = 30;
1187 args->acdirmax = 60;
1188 args->mount_server.protocol = XPRT_TRANSPORT_UDP;
1189 args->nfs_server.protocol = XPRT_TRANSPORT_TCP;
1190
1191 switch (data->version) {
1192 case 1:
1193 data->namlen = 0;
1194 case 2:
1195 data->bsize = 0;
1196 case 3:
1197 if (data->flags & NFS_MOUNT_VER3)
1198 goto out_no_v3;
1199 data->root.size = NFS2_FHSIZE;
1200 memcpy(data->root.data, data->old_root.data, NFS2_FHSIZE);
1201 case 4:
1202 if (data->flags & NFS_MOUNT_SECFLAVOUR)
1203 goto out_no_sec;
1204 case 5:
1205 memset(data->context, 0, sizeof(data->context));
1206 case 6:
1207 if (data->flags & NFS_MOUNT_VER3)
1208 mntfh->size = data->root.size;
1209 else
1210 mntfh->size = NFS2_FHSIZE;
1211
1212 if (mntfh->size > sizeof(mntfh->data))
1213 goto out_invalid_fh;
1214
1215 memcpy(mntfh->data, data->root.data, mntfh->size);
1216 if (mntfh->size < sizeof(mntfh->data))
1217 memset(mntfh->data + mntfh->size, 0,
1218 sizeof(mntfh->data) - mntfh->size);
1219
1220 /*
1221 * Translate to nfs_parsed_mount_data, which nfs_fill_super
1222 * can deal with.
1223 */
1224 args->flags = data->flags;
1225 args->rsize = data->rsize;
1226 args->wsize = data->wsize;
1227 args->flags = data->flags;
1228 args->timeo = data->timeo;
1229 args->retrans = data->retrans;
1230 args->acregmin = data->acregmin;
1231 args->acregmax = data->acregmax;
1232 args->acdirmin = data->acdirmin;
1233 args->acdirmax = data->acdirmax;
1234
1235 memcpy(&args->nfs_server.address, &data->addr,
1236 sizeof(data->addr));
1237 args->nfs_server.addrlen = sizeof(data->addr);
1238 if (!nfs_verify_server_address((struct sockaddr *)
1239 &args->nfs_server.address))
1240 goto out_no_address;
1241
1242 if (!(data->flags & NFS_MOUNT_TCP))
1243 args->nfs_server.protocol = XPRT_TRANSPORT_UDP;
1244 /* N.B. caller will free nfs_server.hostname in all cases */
1245 args->nfs_server.hostname = kstrdup(data->hostname, GFP_KERNEL);
1246 args->namlen = data->namlen;
1247 args->bsize = data->bsize;
1248 args->auth_flavors[0] = data->pseudoflavor;
1249 <<<<<<< HEAD:fs/nfs/super.c
1250 =======
1251
1252 /*
1253 * The legacy version 6 binary mount data from userspace has a
1254 * field used only to transport selinux information into the
1255 * the kernel. To continue to support that functionality we
1256 * have a touch of selinux knowledge here in the NFS code. The
1257 * userspace code converted context=blah to just blah so we are
1258 * converting back to the full string selinux understands.
1259 */
1260 if (data->context[0]){
1261 #ifdef CONFIG_SECURITY_SELINUX
1262 int rc;
1263 char *opts_str = kmalloc(sizeof(data->context) + 8, GFP_KERNEL);
1264 if (!opts_str)
1265 return -ENOMEM;
1266 strcpy(opts_str, "context=");
1267 data->context[NFS_MAX_CONTEXT_LEN] = '\0';
1268 strcat(opts_str, &data->context[0]);
1269 rc = security_sb_parse_opts_str(opts_str, &args->lsm_opts);
1270 kfree(opts_str);
1271 if (rc)
1272 return rc;
1273 #else
1274 return -EINVAL;
1275 #endif
1276 }
1277
1278 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a:fs/nfs/super.c
1279 break;
1280 default: {
1281 unsigned int len;
1282 char *c;
1283 int status;
1284
1285 if (nfs_parse_mount_options((char *)options, args) == 0)
1286 return -EINVAL;
1287
1288 if (!nfs_verify_server_address((struct sockaddr *)
1289 &args->nfs_server.address))
1290 goto out_no_address;
1291
1292 c = strchr(dev_name, ':');
1293 if (c == NULL)
1294 return -EINVAL;
1295 len = c - dev_name;
1296 /* N.B. caller will free nfs_server.hostname in all cases */
1297 args->nfs_server.hostname = kstrndup(dev_name, len, GFP_KERNEL);
1298
1299 c++;
1300 if (strlen(c) > NFS_MAXPATHLEN)
1301 return -ENAMETOOLONG;
1302 args->nfs_server.export_path = c;
1303
1304 status = nfs_try_mount(args, mntfh);
1305 if (status)
1306 return status;
1307
1308 break;
1309 }
1310 }
1311
1312 if (!(args->flags & NFS_MOUNT_SECFLAVOUR))
1313 args->auth_flavors[0] = RPC_AUTH_UNIX;
1314
1315 #ifndef CONFIG_NFS_V3
1316 if (args->flags & NFS_MOUNT_VER3)
1317 goto out_v3_not_compiled;
1318 #endif /* !CONFIG_NFS_V3 */
1319
1320 return 0;
1321
1322 out_no_data:
1323 dfprintk(MOUNT, "NFS: mount program didn't pass any mount data\n");
1324 return -EINVAL;
1325
1326 out_no_v3:
1327 dfprintk(MOUNT, "NFS: nfs_mount_data version %d does not support v3\n",
1328 data->version);
1329 return -EINVAL;
1330
1331 out_no_sec:
1332 dfprintk(MOUNT, "NFS: nfs_mount_data version supports only AUTH_SYS\n");
1333 return -EINVAL;
1334
1335 #ifndef CONFIG_NFS_V3
1336 out_v3_not_compiled:
1337 dfprintk(MOUNT, "NFS: NFSv3 is not compiled into kernel\n");
1338 return -EPROTONOSUPPORT;
1339 #endif /* !CONFIG_NFS_V3 */
1340
1341 out_no_address:
1342 dfprintk(MOUNT, "NFS: mount program didn't pass remote address\n");
1343 return -EINVAL;
1344
1345 out_invalid_fh:
1346 dfprintk(MOUNT, "NFS: invalid root filehandle\n");
1347 return -EINVAL;
1348 }
1349
1350 /*
1351 * Initialise the common bits of the superblock
1352 */
1353 static inline void nfs_initialise_sb(struct super_block *sb)
1354 {
1355 struct nfs_server *server = NFS_SB(sb);
1356
1357 sb->s_magic = NFS_SUPER_MAGIC;
1358
1359 /* We probably want something more informative here */
1360 snprintf(sb->s_id, sizeof(sb->s_id),
1361 "%x:%x", MAJOR(sb->s_dev), MINOR(sb->s_dev));
1362
1363 if (sb->s_blocksize == 0)
1364 sb->s_blocksize = nfs_block_bits(server->wsize,
1365 &sb->s_blocksize_bits);
1366
1367 if (server->flags & NFS_MOUNT_NOAC)
1368 sb->s_flags |= MS_SYNCHRONOUS;
1369
1370 nfs_super_set_maxbytes(sb, server->maxfilesize);
1371 }
1372
1373 /*
1374 * Finish setting up an NFS2/3 superblock
1375 */
1376 static void nfs_fill_super(struct super_block *sb,
1377 struct nfs_parsed_mount_data *data)
1378 {
1379 struct nfs_server *server = NFS_SB(sb);
1380
1381 sb->s_blocksize_bits = 0;
1382 sb->s_blocksize = 0;
1383 if (data->bsize)
1384 sb->s_blocksize = nfs_block_size(data->bsize, &sb->s_blocksize_bits);
1385
1386 if (server->flags & NFS_MOUNT_VER3) {
1387 /* The VFS shouldn't apply the umask to mode bits. We will do
1388 * so ourselves when necessary.
1389 */
1390 sb->s_flags |= MS_POSIXACL;
1391 sb->s_time_gran = 1;
1392 }
1393
1394 sb->s_op = &nfs_sops;
1395 nfs_initialise_sb(sb);
1396 }
1397
1398 /*
1399 * Finish setting up a cloned NFS2/3 superblock
1400 */
1401 static void nfs_clone_super(struct super_block *sb,
1402 const struct super_block *old_sb)
1403 {
1404 struct nfs_server *server = NFS_SB(sb);
1405
1406 sb->s_blocksize_bits = old_sb->s_blocksize_bits;
1407 sb->s_blocksize = old_sb->s_blocksize;
1408 sb->s_maxbytes = old_sb->s_maxbytes;
1409
1410 if (server->flags & NFS_MOUNT_VER3) {
1411 /* The VFS shouldn't apply the umask to mode bits. We will do
1412 * so ourselves when necessary.
1413 */
1414 sb->s_flags |= MS_POSIXACL;
1415 sb->s_time_gran = 1;
1416 }
1417
1418 sb->s_op = old_sb->s_op;
1419 nfs_initialise_sb(sb);
1420 }
1421
1422 #define NFS_MS_MASK (MS_RDONLY|MS_NOSUID|MS_NODEV|MS_NOEXEC|MS_SYNCHRONOUS)
1423
1424 static int nfs_compare_mount_options(const struct super_block *s, const struct nfs_server *b, int flags)
1425 {
1426 const struct nfs_server *a = s->s_fs_info;
1427 const struct rpc_clnt *clnt_a = a->client;
1428 const struct rpc_clnt *clnt_b = b->client;
1429
1430 if ((s->s_flags & NFS_MS_MASK) != (flags & NFS_MS_MASK))
1431 goto Ebusy;
1432 if (a->nfs_client != b->nfs_client)
1433 goto Ebusy;
1434 if (a->flags != b->flags)
1435 goto Ebusy;
1436 if (a->wsize != b->wsize)
1437 goto Ebusy;
1438 if (a->rsize != b->rsize)
1439 goto Ebusy;
1440 if (a->acregmin != b->acregmin)
1441 goto Ebusy;
1442 if (a->acregmax != b->acregmax)
1443 goto Ebusy;
1444 if (a->acdirmin != b->acdirmin)
1445 goto Ebusy;
1446 if (a->acdirmax != b->acdirmax)
1447 goto Ebusy;
1448 if (clnt_a->cl_auth->au_flavor != clnt_b->cl_auth->au_flavor)
1449 goto Ebusy;
1450 return 1;
1451 Ebusy:
1452 return 0;
1453 }
1454
1455 struct nfs_sb_mountdata {
1456 struct nfs_server *server;
1457 int mntflags;
1458 };
1459
1460 static int nfs_set_super(struct super_block *s, void *data)
1461 {
1462 struct nfs_sb_mountdata *sb_mntdata = data;
1463 struct nfs_server *server = sb_mntdata->server;
1464 int ret;
1465
1466 s->s_flags = sb_mntdata->mntflags;
1467 s->s_fs_info = server;
1468 ret = set_anon_super(s, server);
1469 if (ret == 0)
1470 server->s_dev = s->s_dev;
1471 return ret;
1472 }
1473
1474 static int nfs_compare_super_address(struct nfs_server *server1,
1475 struct nfs_server *server2)
1476 {
1477 struct sockaddr *sap1, *sap2;
1478
1479 sap1 = (struct sockaddr *)&server1->nfs_client->cl_addr;
1480 sap2 = (struct sockaddr *)&server2->nfs_client->cl_addr;
1481
1482 if (sap1->sa_family != sap2->sa_family)
1483 return 0;
1484
1485 switch (sap1->sa_family) {
1486 case AF_INET: {
1487 struct sockaddr_in *sin1 = (struct sockaddr_in *)sap1;
1488 struct sockaddr_in *sin2 = (struct sockaddr_in *)sap2;
1489 if (sin1->sin_addr.s_addr != sin2->sin_addr.s_addr)
1490 return 0;
1491 if (sin1->sin_port != sin2->sin_port)
1492 return 0;
1493 break;
1494 }
1495 case AF_INET6: {
1496 struct sockaddr_in6 *sin1 = (struct sockaddr_in6 *)sap1;
1497 struct sockaddr_in6 *sin2 = (struct sockaddr_in6 *)sap2;
1498 if (!ipv6_addr_equal(&sin1->sin6_addr, &sin2->sin6_addr))
1499 return 0;
1500 if (sin1->sin6_port != sin2->sin6_port)
1501 return 0;
1502 break;
1503 }
1504 default:
1505 return 0;
1506 }
1507
1508 return 1;
1509 }
1510
1511 static int nfs_compare_super(struct super_block *sb, void *data)
1512 {
1513 struct nfs_sb_mountdata *sb_mntdata = data;
1514 struct nfs_server *server = sb_mntdata->server, *old = NFS_SB(sb);
1515 int mntflags = sb_mntdata->mntflags;
1516
1517 if (!nfs_compare_super_address(old, server))
1518 return 0;
1519 /* Note: NFS_MOUNT_UNSHARED == NFS4_MOUNT_UNSHARED */
1520 if (old->flags & NFS_MOUNT_UNSHARED)
1521 return 0;
1522 if (memcmp(&old->fsid, &server->fsid, sizeof(old->fsid)) != 0)
1523 return 0;
1524 return nfs_compare_mount_options(sb, server, mntflags);
1525 }
1526
1527 static int nfs_get_sb(struct file_system_type *fs_type,
1528 int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt)
1529 {
1530 struct nfs_server *server = NULL;
1531 struct super_block *s;
1532 struct nfs_fh mntfh;
1533 struct nfs_parsed_mount_data data;
1534 struct dentry *mntroot;
1535 int (*compare_super)(struct super_block *, void *) = nfs_compare_super;
1536 struct nfs_sb_mountdata sb_mntdata = {
1537 .mntflags = flags,
1538 };
1539 int error;
1540
1541 <<<<<<< HEAD:fs/nfs/super.c
1542 =======
1543 security_init_mnt_opts(&data.lsm_opts);
1544
1545 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a:fs/nfs/super.c
1546 /* Validate the mount data */
1547 error = nfs_validate_mount_data(raw_data, &data, &mntfh, dev_name);
1548 if (error < 0)
1549 goto out;
1550
1551 /* Get a volume representation */
1552 server = nfs_create_server(&data, &mntfh);
1553 if (IS_ERR(server)) {
1554 error = PTR_ERR(server);
1555 goto out;
1556 }
1557 sb_mntdata.server = server;
1558
1559 if (server->flags & NFS_MOUNT_UNSHARED)
1560 compare_super = NULL;
1561
1562 /* Get a superblock - note that we may end up sharing one that already exists */
1563 s = sget(fs_type, compare_super, nfs_set_super, &sb_mntdata);
1564 if (IS_ERR(s)) {
1565 error = PTR_ERR(s);
1566 goto out_err_nosb;
1567 }
1568
1569 if (s->s_fs_info != server) {
1570 nfs_free_server(server);
1571 server = NULL;
1572 }
1573
1574 if (!s->s_root) {
1575 /* initial superblock/root creation */
1576 nfs_fill_super(s, &data);
1577 }
1578
1579 mntroot = nfs_get_root(s, &mntfh);
1580 if (IS_ERR(mntroot)) {
1581 error = PTR_ERR(mntroot);
1582 goto error_splat_super;
1583 }
1584
1585 <<<<<<< HEAD:fs/nfs/super.c
1586 =======
1587 error = security_sb_set_mnt_opts(s, &data.lsm_opts);
1588 if (error)
1589 goto error_splat_root;
1590
1591 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a:fs/nfs/super.c
1592 s->s_flags |= MS_ACTIVE;
1593 mnt->mnt_sb = s;
1594 mnt->mnt_root = mntroot;
1595 error = 0;
1596
1597 out:
1598 kfree(data.nfs_server.hostname);
1599 kfree(data.mount_server.hostname);
1600 <<<<<<< HEAD:fs/nfs/super.c
1601 =======
1602 security_free_mnt_opts(&data.lsm_opts);
1603 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a:fs/nfs/super.c
1604 return error;
1605
1606 out_err_nosb:
1607 nfs_free_server(server);
1608 goto out;
1609
1610 <<<<<<< HEAD:fs/nfs/super.c
1611 =======
1612 error_splat_root:
1613 dput(mntroot);
1614 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a:fs/nfs/super.c
1615 error_splat_super:
1616 up_write(&s->s_umount);
1617 deactivate_super(s);
1618 goto out;
1619 }
1620
1621 /*
1622 * Destroy an NFS2/3 superblock
1623 */
1624 static void nfs_kill_super(struct super_block *s)
1625 {
1626 struct nfs_server *server = NFS_SB(s);
1627
1628 kill_anon_super(s);
1629 nfs_free_server(server);
1630 }
1631
1632 /*
1633 * Clone an NFS2/3 server record on xdev traversal (FSID-change)
1634 */
1635 static int nfs_xdev_get_sb(struct file_system_type *fs_type, int flags,
1636 const char *dev_name, void *raw_data,
1637 struct vfsmount *mnt)
1638 {
1639 struct nfs_clone_mount *data = raw_data;
1640 struct super_block *s;
1641 struct nfs_server *server;
1642 struct dentry *mntroot;
1643 int (*compare_super)(struct super_block *, void *) = nfs_compare_super;
1644 struct nfs_sb_mountdata sb_mntdata = {
1645 .mntflags = flags,
1646 };
1647 int error;
1648
1649 dprintk("--> nfs_xdev_get_sb()\n");
1650
1651 /* create a new volume representation */
1652 server = nfs_clone_server(NFS_SB(data->sb), data->fh, data->fattr);
1653 if (IS_ERR(server)) {
1654 error = PTR_ERR(server);
1655 goto out_err_noserver;
1656 }
1657 sb_mntdata.server = server;
1658
1659 if (server->flags & NFS_MOUNT_UNSHARED)
1660 compare_super = NULL;
1661
1662 /* Get a superblock - note that we may end up sharing one that already exists */
1663 s = sget(&nfs_fs_type, compare_super, nfs_set_super, &sb_mntdata);
1664 if (IS_ERR(s)) {
1665 error = PTR_ERR(s);
1666 goto out_err_nosb;
1667 }
1668
1669 if (s->s_fs_info != server) {
1670 nfs_free_server(server);
1671 server = NULL;
1672 }
1673
1674 if (!s->s_root) {
1675 /* initial superblock/root creation */
1676 nfs_clone_super(s, data->sb);
1677 }
1678
1679 mntroot = nfs_get_root(s, data->fh);
1680 if (IS_ERR(mntroot)) {
1681 error = PTR_ERR(mntroot);
1682 goto error_splat_super;
1683 }
1684 if (mntroot->d_inode->i_op != NFS_SB(s)->nfs_client->rpc_ops->dir_inode_ops) {
1685 dput(mntroot);
1686 error = -ESTALE;
1687 goto error_splat_super;
1688 }
1689
1690 s->s_flags |= MS_ACTIVE;
1691 mnt->mnt_sb = s;
1692 mnt->mnt_root = mntroot;
1693
1694 <<<<<<< HEAD:fs/nfs/super.c
1695 =======
1696 /* clone any lsm security options from the parent to the new sb */
1697 security_sb_clone_mnt_opts(data->sb, s);
1698
1699 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a:fs/nfs/super.c
1700 dprintk("<-- nfs_xdev_get_sb() = 0\n");
1701 return 0;
1702
1703 out_err_nosb:
1704 nfs_free_server(server);
1705 out_err_noserver:
1706 dprintk("<-- nfs_xdev_get_sb() = %d [error]\n", error);
1707 return error;
1708
1709 error_splat_super:
1710 up_write(&s->s_umount);
1711 deactivate_super(s);
1712 dprintk("<-- nfs_xdev_get_sb() = %d [splat]\n", error);
1713 return error;
1714 }
1715
1716 #ifdef CONFIG_NFS_V4
1717
1718 /*
1719 * Finish setting up a cloned NFS4 superblock
1720 */
1721 static void nfs4_clone_super(struct super_block *sb,
1722 const struct super_block *old_sb)
1723 {
1724 sb->s_blocksize_bits = old_sb->s_blocksize_bits;
1725 sb->s_blocksize = old_sb->s_blocksize;
1726 sb->s_maxbytes = old_sb->s_maxbytes;
1727 sb->s_time_gran = 1;
1728 sb->s_op = old_sb->s_op;
1729 nfs_initialise_sb(sb);
1730 }
1731
1732 /*
1733 * Set up an NFS4 superblock
1734 */
1735 static void nfs4_fill_super(struct super_block *sb)
1736 {
1737 sb->s_time_gran = 1;
1738 sb->s_op = &nfs4_sops;
1739 nfs_initialise_sb(sb);
1740 }
1741
1742 /*
1743 * If the user didn't specify a port, set the port number to
1744 * the NFS version 4 default port.
1745 */
1746 static void nfs4_default_port(struct sockaddr *sap)
1747 {
1748 switch (sap->sa_family) {
1749 case AF_INET: {
1750 struct sockaddr_in *ap = (struct sockaddr_in *)sap;
1751 if (ap->sin_port == 0)
1752 ap->sin_port = htons(NFS_PORT);
1753 break;
1754 }
1755 case AF_INET6: {
1756 struct sockaddr_in6 *ap = (struct sockaddr_in6 *)sap;
1757 if (ap->sin6_port == 0)
1758 ap->sin6_port = htons(NFS_PORT);
1759 break;
1760 }
1761 }
1762 }
1763
1764 /*
1765 * Validate NFSv4 mount options
1766 */
1767 static int nfs4_validate_mount_data(void *options,
1768 struct nfs_parsed_mount_data *args,
1769 const char *dev_name)
1770 {
1771 struct sockaddr_in *ap;
1772 struct nfs4_mount_data *data = (struct nfs4_mount_data *)options;
1773 char *c;
1774
1775 memset(args, 0, sizeof(*args));
1776
1777 if (data == NULL)
1778 goto out_no_data;
1779
1780 args->rsize = NFS_MAX_FILE_IO_SIZE;
1781 args->wsize = NFS_MAX_FILE_IO_SIZE;
1782 args->timeo = 600;
1783 args->retrans = 2;
1784 args->acregmin = 3;
1785 args->acregmax = 60;
1786 args->acdirmin = 30;
1787 args->acdirmax = 60;
1788 args->nfs_server.protocol = XPRT_TRANSPORT_TCP;
1789
1790 switch (data->version) {
1791 case 1:
1792 ap = (struct sockaddr_in *)&args->nfs_server.address;
1793 if (data->host_addrlen > sizeof(args->nfs_server.address))
1794 goto out_no_address;
1795 if (data->host_addrlen == 0)
1796 goto out_no_address;
1797 args->nfs_server.addrlen = data->host_addrlen;
1798 if (copy_from_user(ap, data->host_addr, data->host_addrlen))
1799 return -EFAULT;
1800 if (!nfs_verify_server_address((struct sockaddr *)
1801 &args->nfs_server.address))
1802 goto out_no_address;
1803
1804 nfs4_default_port((struct sockaddr *)
1805 &args->nfs_server.address);
1806
1807 switch (data->auth_flavourlen) {
1808 case 0:
1809 args->auth_flavors[0] = RPC_AUTH_UNIX;
1810 break;
1811 case 1:
1812 if (copy_from_user(&args->auth_flavors[0],
1813 data->auth_flavours,
1814 sizeof(args->auth_flavors[0])))
1815 return -EFAULT;
1816 break;
1817 default:
1818 goto out_inval_auth;
1819 }
1820
1821 c = strndup_user(data->hostname.data, NFS4_MAXNAMLEN);
1822 if (IS_ERR(c))
1823 return PTR_ERR(c);
1824 args->nfs_server.hostname = c;
1825
1826 c = strndup_user(data->mnt_path.data, NFS4_MAXPATHLEN);
1827 if (IS_ERR(c))
1828 return PTR_ERR(c);
1829 args->nfs_server.export_path = c;
1830 dfprintk(MOUNT, "NFS: MNTPATH: '%s'\n", c);
1831
1832 c = strndup_user(data->client_addr.data, 16);
1833 if (IS_ERR(c))
1834 return PTR_ERR(c);
1835 args->client_address = c;
1836
1837 /*
1838 * Translate to nfs_parsed_mount_data, which nfs4_fill_super
1839 * can deal with.
1840 */
1841
1842 args->flags = data->flags & NFS4_MOUNT_FLAGMASK;
1843 args->rsize = data->rsize;
1844 args->wsize = data->wsize;
1845 args->timeo = data->timeo;
1846 args->retrans = data->retrans;
1847 args->acregmin = data->acregmin;
1848 args->acregmax = data->acregmax;
1849 args->acdirmin = data->acdirmin;
1850 args->acdirmax = data->acdirmax;
1851 args->nfs_server.protocol = data->proto;
1852
1853 break;
1854 default: {
1855 unsigned int len;
1856
1857 if (nfs_parse_mount_options((char *)options, args) == 0)
1858 return -EINVAL;
1859
1860 if (!nfs_verify_server_address((struct sockaddr *)
1861 &args->nfs_server.address))
1862 return -EINVAL;
1863
1864 nfs4_default_port((struct sockaddr *)
1865 &args->nfs_server.address);
1866
1867 switch (args->auth_flavor_len) {
1868 case 0:
1869 args->auth_flavors[0] = RPC_AUTH_UNIX;
1870 break;
1871 case 1:
1872 break;
1873 default:
1874 goto out_inval_auth;
1875 }
1876
1877 /*
1878 * Split "dev_name" into "hostname:mntpath".
1879 */
1880 c = strchr(dev_name, ':');
1881 if (c == NULL)
1882 return -EINVAL;
1883 /* while calculating len, pretend ':' is '\0' */
1884 len = c - dev_name;
1885 if (len > NFS4_MAXNAMLEN)
1886 return -ENAMETOOLONG;
1887 /* N.B. caller will free nfs_server.hostname in all cases */
1888 args->nfs_server.hostname = kstrndup(dev_name, len, GFP_KERNEL);
1889
1890 c++; /* step over the ':' */
1891 len = strlen(c);
1892 if (len > NFS4_MAXPATHLEN)
1893 return -ENAMETOOLONG;
1894 args->nfs_server.export_path = kstrndup(c, len, GFP_KERNEL);
1895
1896 dprintk("NFS: MNTPATH: '%s'\n", args->nfs_server.export_path);
1897
1898 if (args->client_address == NULL)
1899 goto out_no_client_address;
1900
1901 break;
1902 }
1903 }
1904
1905 return 0;
1906
1907 out_no_data:
1908 dfprintk(MOUNT, "NFS4: mount program didn't pass any mount data\n");
1909 return -EINVAL;
1910
1911 out_inval_auth:
1912 dfprintk(MOUNT, "NFS4: Invalid number of RPC auth flavours %d\n",
1913 data->auth_flavourlen);
1914 return -EINVAL;
1915
1916 out_no_address:
1917 dfprintk(MOUNT, "NFS4: mount program didn't pass remote address\n");
1918 return -EINVAL;
1919
1920 out_no_client_address:
1921 dfprintk(MOUNT, "NFS4: mount program didn't pass callback address\n");
1922 return -EINVAL;
1923 }
1924
1925 /*
1926 * Get the superblock for an NFS4 mountpoint
1927 */
1928 static int nfs4_get_sb(struct file_system_type *fs_type,
1929 int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt)
1930 {
1931 struct nfs_parsed_mount_data data;
1932 struct super_block *s;
1933 struct nfs_server *server;
1934 struct nfs_fh mntfh;
1935 struct dentry *mntroot;
1936 int (*compare_super)(struct super_block *, void *) = nfs_compare_super;
1937 struct nfs_sb_mountdata sb_mntdata = {
1938 .mntflags = flags,
1939 };
1940 int error;
1941
1942 <<<<<<< HEAD:fs/nfs/super.c
1943 =======
1944 security_init_mnt_opts(&data.lsm_opts);
1945
1946 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a:fs/nfs/super.c
1947 /* Validate the mount data */
1948 error = nfs4_validate_mount_data(raw_data, &data, dev_name);
1949 if (error < 0)
1950 goto out;
1951
1952 /* Get a volume representation */
1953 server = nfs4_create_server(&data, &mntfh);
1954 if (IS_ERR(server)) {
1955 error = PTR_ERR(server);
1956 goto out;
1957 }
1958 sb_mntdata.server = server;
1959
1960 if (server->flags & NFS4_MOUNT_UNSHARED)
1961 compare_super = NULL;
1962
1963 /* Get a superblock - note that we may end up sharing one that already exists */
1964 s = sget(fs_type, compare_super, nfs_set_super, &sb_mntdata);
1965 if (IS_ERR(s)) {
1966 error = PTR_ERR(s);
1967 goto out_free;
1968 }
1969
1970 if (s->s_fs_info != server) {
1971 nfs_free_server(server);
1972 server = NULL;
1973 }
1974
1975 if (!s->s_root) {
1976 /* initial superblock/root creation */
1977 nfs4_fill_super(s);
1978 }
1979
1980 mntroot = nfs4_get_root(s, &mntfh);
1981 if (IS_ERR(mntroot)) {
1982 error = PTR_ERR(mntroot);
1983 goto error_splat_super;
1984 }
1985
1986 s->s_flags |= MS_ACTIVE;
1987 mnt->mnt_sb = s;
1988 mnt->mnt_root = mntroot;
1989 error = 0;
1990
1991 out:
1992 kfree(data.client_address);
1993 kfree(data.nfs_server.export_path);
1994 kfree(data.nfs_server.hostname);
1995 <<<<<<< HEAD:fs/nfs/super.c
1996 =======
1997 security_free_mnt_opts(&data.lsm_opts);
1998 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a:fs/nfs/super.c
1999 return error;
2000
2001 out_free:
2002 nfs_free_server(server);
2003 goto out;
2004
2005 error_splat_super:
2006 up_write(&s->s_umount);
2007 deactivate_super(s);
2008 goto out;
2009 }
2010
2011 static void nfs4_kill_super(struct super_block *sb)
2012 {
2013 struct nfs_server *server = NFS_SB(sb);
2014
2015 nfs_return_all_delegations(sb);
2016 kill_anon_super(sb);
2017
2018 nfs4_renewd_prepare_shutdown(server);
2019 nfs_free_server(server);
2020 }
2021
2022 /*
2023 * Clone an NFS4 server record on xdev traversal (FSID-change)
2024 */
2025 static int nfs4_xdev_get_sb(struct file_system_type *fs_type, int flags,
2026 const char *dev_name, void *raw_data,
2027 struct vfsmount *mnt)
2028 {
2029 struct nfs_clone_mount *data = raw_data;
2030 struct super_block *s;
2031 struct nfs_server *server;
2032 struct dentry *mntroot;
2033 int (*compare_super)(struct super_block *, void *) = nfs_compare_super;
2034 struct nfs_sb_mountdata sb_mntdata = {
2035 .mntflags = flags,
2036 };
2037 int error;
2038
2039 dprintk("--> nfs4_xdev_get_sb()\n");
2040
2041 /* create a new volume representation */
2042 server = nfs_clone_server(NFS_SB(data->sb), data->fh, data->fattr);
2043 if (IS_ERR(server)) {
2044 error = PTR_ERR(server);
2045 goto out_err_noserver;
2046 }
2047 sb_mntdata.server = server;
2048
2049 if (server->flags & NFS4_MOUNT_UNSHARED)
2050 compare_super = NULL;
2051
2052 /* Get a superblock - note that we may end up sharing one that already exists */
2053 s = sget(&nfs_fs_type, compare_super, nfs_set_super, &sb_mntdata);
2054 if (IS_ERR(s)) {
2055 error = PTR_ERR(s);
2056 goto out_err_nosb;
2057 }
2058
2059 if (s->s_fs_info != server) {
2060 nfs_free_server(server);
2061 server = NULL;
2062 }
2063
2064 if (!s->s_root) {
2065 /* initial superblock/root creation */
2066 nfs4_clone_super(s, data->sb);
2067 }
2068
2069 mntroot = nfs4_get_root(s, data->fh);
2070 if (IS_ERR(mntroot)) {
2071 error = PTR_ERR(mntroot);
2072 goto error_splat_super;
2073 }
2074 if (mntroot->d_inode->i_op != NFS_SB(s)->nfs_client->rpc_ops->dir_inode_ops) {
2075 dput(mntroot);
2076 error = -ESTALE;
2077 goto error_splat_super;
2078 }
2079
2080 s->s_flags |= MS_ACTIVE;
2081 mnt->mnt_sb = s;
2082 mnt->mnt_root = mntroot;
2083
2084 dprintk("<-- nfs4_xdev_get_sb() = 0\n");
2085 return 0;
2086
2087 out_err_nosb:
2088 nfs_free_server(server);
2089 out_err_noserver:
2090 dprintk("<-- nfs4_xdev_get_sb() = %d [error]\n", error);
2091 return error;
2092
2093 error_splat_super:
2094 up_write(&s->s_umount);
2095 deactivate_super(s);
2096 dprintk("<-- nfs4_xdev_get_sb() = %d [splat]\n", error);
2097 return error;
2098 }
2099
2100 /*
2101 * Create an NFS4 server record on referral traversal
2102 */
2103 static int nfs4_referral_get_sb(struct file_system_type *fs_type, int flags,
2104 const char *dev_name, void *raw_data,
2105 struct vfsmount *mnt)
2106 {
2107 struct nfs_clone_mount *data = raw_data;
2108 struct super_block *s;
2109 struct nfs_server *server;
2110 struct dentry *mntroot;
2111 struct nfs_fh mntfh;
2112 int (*compare_super)(struct super_block *, void *) = nfs_compare_super;
2113 struct nfs_sb_mountdata sb_mntdata = {
2114 .mntflags = flags,
2115 };
2116 int error;
2117
2118 dprintk("--> nfs4_referral_get_sb()\n");
2119
2120 /* create a new volume representation */
2121 server = nfs4_create_referral_server(data, &mntfh);
2122 if (IS_ERR(server)) {
2123 error = PTR_ERR(server);
2124 goto out_err_noserver;
2125 }
2126 sb_mntdata.server = server;
2127
2128 if (server->flags & NFS4_MOUNT_UNSHARED)
2129 compare_super = NULL;
2130
2131 /* Get a superblock - note that we may end up sharing one that already exists */
2132 s = sget(&nfs_fs_type, compare_super, nfs_set_super, &sb_mntdata);
2133 if (IS_ERR(s)) {
2134 error = PTR_ERR(s);
2135 goto out_err_nosb;
2136 }
2137
2138 if (s->s_fs_info != server) {
2139 nfs_free_server(server);
2140 server = NULL;
2141 }
2142
2143 if (!s->s_root) {
2144 /* initial superblock/root creation */
2145 nfs4_fill_super(s);
2146 }
2147
2148 mntroot = nfs4_get_root(s, &mntfh);
2149 if (IS_ERR(mntroot)) {
2150 error = PTR_ERR(mntroot);
2151 goto error_splat_super;
2152 }
2153 if (mntroot->d_inode->i_op != NFS_SB(s)->nfs_client->rpc_ops->dir_inode_ops) {
2154 dput(mntroot);
2155 error = -ESTALE;
2156 goto error_splat_super;
2157 }
2158
2159 s->s_flags |= MS_ACTIVE;
2160 mnt->mnt_sb = s;
2161 mnt->mnt_root = mntroot;
2162
2163 dprintk("<-- nfs4_referral_get_sb() = 0\n");
2164 return 0;
2165
2166 out_err_nosb:
2167 nfs_free_server(server);
2168 out_err_noserver:
2169 dprintk("<-- nfs4_referral_get_sb() = %d [error]\n", error);
2170 return error;
2171
2172 error_splat_super:
2173 up_write(&s->s_umount);
2174 deactivate_super(s);
2175 dprintk("<-- nfs4_referral_get_sb() = %d [splat]\n", error);
2176 return error;
2177 }
2178
2179 #endif /* CONFIG_NFS_V4 */
WRT350N Kernel Patches