blob: 383a027de4528d74bd976cc5bfa237be653c5e77 [file] [log] [blame]
David Howellsf7b422b2006-06-09 09:34:33 -04001/*
2 * linux/fs/nfs/super.c
3 *
4 * Copyright (C) 1992 Rick Sladkey
5 *
6 * nfs superblock handling functions
7 *
Alan Cox526719b2008-10-27 15:19:48 +00008 * Modularised by Alan Cox <alan@lxorguk.ukuu.org.uk>, while hacking some
David Howellsf7b422b2006-06-09 09:34:33 -04009 * 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 *
David Howells54ceac42006-08-22 20:06:13 -040016 * - 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())
David Howellsf7b422b2006-06-09 09:34:33 -040021 */
22
David Howellsf7b422b2006-06-09 09:34:33 -040023#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>
Jeff Layton59766872013-02-04 12:50:00 -050034#include <linux/sunrpc/addr.h>
David Howellsf7b422b2006-06-09 09:34:33 -040035#include <linux/sunrpc/stats.h>
36#include <linux/sunrpc/metrics.h>
\"Talpey, Thomas\0896a722007-09-10 13:48:23 -040037#include <linux/sunrpc/xprtsock.h>
\"Talpey, Thomas\2cf7ff72007-09-10 13:49:41 -040038#include <linux/sunrpc/xprtrdma.h>
David Howellsf7b422b2006-06-09 09:34:33 -040039#include <linux/nfs_fs.h>
40#include <linux/nfs_mount.h>
41#include <linux/nfs4_mount.h>
42#include <linux/lockd/bind.h>
David Howellsf7b422b2006-06-09 09:34:33 -040043#include <linux/seq_file.h>
44#include <linux/mount.h>
Trond Myklebustc02d7ad2009-06-22 15:09:14 -040045#include <linux/namei.h>
David Howellsf7b422b2006-06-09 09:34:33 -040046#include <linux/vfs.h>
47#include <linux/inet.h>
Chuck Leverfd00a8f2007-12-10 14:57:38 -050048#include <linux/in6.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090049#include <linux/slab.h>
Chuck Leverfd00a8f2007-12-10 14:57:38 -050050#include <net/ipv6.h>
Chuck Leverd8e77482008-06-23 12:37:01 -040051#include <linux/netdevice.h>
David Howellsf7b422b2006-06-09 09:34:33 -040052#include <linux/nfs_xdr.h>
Adrian Bunkb5d5dfb2007-02-12 00:53:40 -080053#include <linux/magic.h>
Chuck Leverbf0fd762007-07-01 12:13:44 -040054#include <linux/parser.h>
Stanislav Kinsburskye50a7a12012-01-10 16:12:46 +040055#include <linux/nsproxy.h>
Trond Myklebust2446ab62012-03-01 17:00:56 -050056#include <linux/rcupdate.h>
David Howellsf7b422b2006-06-09 09:34:33 -040057
David Howellsf7b422b2006-06-09 09:34:33 -040058#include <asm/uaccess.h>
59
60#include "nfs4_fs.h"
61#include "callback.h"
62#include "delegation.h"
63#include "iostat.h"
64#include "internal.h"
David Howells08734042009-04-03 16:42:42 +010065#include "fscache.h"
Trond Myklebust76e697b2012-11-26 14:20:49 -050066#include "nfs4session.h"
J. Bruce Fieldsae50c0b2011-05-22 19:48:21 +030067#include "pnfs.h"
Bryan Schumakerab7017a2012-07-30 16:05:16 -040068#include "nfs.h"
David Howellsf7b422b2006-06-09 09:34:33 -040069
70#define NFSDBG_FACILITY NFSDBG_VFS
Bryan Schumakerb72e4f42012-05-10 15:07:40 -040071#define NFS_TEXT_DATA 1
David Howellsf7b422b2006-06-09 09:34:33 -040072
Bryan Schumaker1c606fb2012-07-30 16:05:24 -040073#if IS_ENABLED(CONFIG_NFS_V3)
Paulius Zaleckas1e657bd2010-10-31 18:21:05 +020074#define NFS_DEFAULT_VERSION 3
75#else
76#define NFS_DEFAULT_VERSION 2
77#endif
78
Chuck Leverbf0fd762007-07-01 12:13:44 -040079enum {
80 /* Mount options that take no arguments */
81 Opt_soft, Opt_hard,
Chuck Leverbf0fd762007-07-01 12:13:44 -040082 Opt_posix, Opt_noposix,
83 Opt_cto, Opt_nocto,
84 Opt_ac, Opt_noac,
85 Opt_lock, Opt_nolock,
\"Talpey, Thomas\2cf7ff72007-09-10 13:49:41 -040086 Opt_udp, Opt_tcp, Opt_rdma,
Chuck Leverbf0fd762007-07-01 12:13:44 -040087 Opt_acl, Opt_noacl,
88 Opt_rdirplus, Opt_nordirplus,
Trond Myklebust75180df2007-05-16 16:53:28 -040089 Opt_sharecache, Opt_nosharecache,
Chuck Leverd7403512008-12-23 15:21:37 -050090 Opt_resvport, Opt_noresvport,
David Howellsb797cac2009-04-03 16:42:48 +010091 Opt_fscache, Opt_nofscache,
Chuck Lever89652612012-09-14 17:24:11 -040092 Opt_migration, Opt_nomigration,
Chuck Leverbf0fd762007-07-01 12:13:44 -040093
94 /* Mount options that take integer arguments */
95 Opt_port,
96 Opt_rsize, Opt_wsize, Opt_bsize,
97 Opt_timeo, Opt_retrans,
98 Opt_acregmin, Opt_acregmax,
99 Opt_acdirmin, Opt_acdirmax,
100 Opt_actimeo,
101 Opt_namelen,
102 Opt_mountport,
Chuck Levere887cbc2007-10-26 13:32:29 -0400103 Opt_mountvers,
Mike Sager3fd5be92009-04-01 09:21:48 -0400104 Opt_minorversion,
Chuck Leverbf0fd762007-07-01 12:13:44 -0400105
106 /* Mount options that take string arguments */
Trond Myklebust0d71b052012-03-02 13:59:49 -0500107 Opt_nfsvers,
Chuck Lever33832032007-12-10 14:59:13 -0500108 Opt_sec, Opt_proto, Opt_mountproto, Opt_mounthost,
Chuck Lever0ac83772007-09-11 18:01:04 -0400109 Opt_addr, Opt_mountaddr, Opt_clientaddr,
Trond Myklebust7973c1f12008-07-15 17:58:14 -0400110 Opt_lookupcache,
David Howellsb797cac2009-04-03 16:42:48 +0100111 Opt_fscache_uniq,
Suresh Jayaraman5eebde22010-09-23 08:55:58 -0400112 Opt_local_lock,
Chuck Leverbf0fd762007-07-01 12:13:44 -0400113
Chuck Leverf45663c2008-06-24 19:28:02 -0400114 /* Special mount options */
115 Opt_userspace, Opt_deprecated, Opt_sloppy,
Chuck Leverbf0fd762007-07-01 12:13:44 -0400116
117 Opt_err
118};
119
Steven Whitehousea447c092008-10-13 10:46:57 +0100120static const match_table_t nfs_mount_option_tokens = {
Chuck Leverbf0fd762007-07-01 12:13:44 -0400121 { Opt_userspace, "bg" },
122 { Opt_userspace, "fg" },
Chuck Leverecbb3842008-06-12 12:37:33 -0400123 { Opt_userspace, "retry=%s" },
124
Chuck Leverf45663c2008-06-24 19:28:02 -0400125 { Opt_sloppy, "sloppy" },
126
Chuck Leverbf0fd762007-07-01 12:13:44 -0400127 { Opt_soft, "soft" },
128 { Opt_hard, "hard" },
Chuck Leverd33e4df2008-06-12 12:37:41 -0400129 { Opt_deprecated, "intr" },
130 { Opt_deprecated, "nointr" },
Chuck Leverbf0fd762007-07-01 12:13:44 -0400131 { Opt_posix, "posix" },
132 { Opt_noposix, "noposix" },
133 { Opt_cto, "cto" },
134 { Opt_nocto, "nocto" },
135 { Opt_ac, "ac" },
136 { Opt_noac, "noac" },
137 { Opt_lock, "lock" },
138 { Opt_nolock, "nolock" },
Chuck Leverbf0fd762007-07-01 12:13:44 -0400139 { Opt_udp, "udp" },
140 { Opt_tcp, "tcp" },
\"Talpey, Thomas\2cf7ff72007-09-10 13:49:41 -0400141 { Opt_rdma, "rdma" },
Chuck Leverbf0fd762007-07-01 12:13:44 -0400142 { Opt_acl, "acl" },
143 { Opt_noacl, "noacl" },
144 { Opt_rdirplus, "rdirplus" },
145 { Opt_nordirplus, "nordirplus" },
Trond Myklebust75180df2007-05-16 16:53:28 -0400146 { Opt_sharecache, "sharecache" },
147 { Opt_nosharecache, "nosharecache" },
Chuck Leverd7403512008-12-23 15:21:37 -0500148 { Opt_resvport, "resvport" },
149 { Opt_noresvport, "noresvport" },
David Howellsb797cac2009-04-03 16:42:48 +0100150 { Opt_fscache, "fsc" },
David Howellsb797cac2009-04-03 16:42:48 +0100151 { Opt_nofscache, "nofsc" },
Chuck Lever89652612012-09-14 17:24:11 -0400152 { Opt_migration, "migration" },
153 { Opt_nomigration, "nomigration" },
Chuck Leverbf0fd762007-07-01 12:13:44 -0400154
Chuck Levera5a16ba2009-06-17 18:02:14 -0700155 { Opt_port, "port=%s" },
156 { Opt_rsize, "rsize=%s" },
157 { Opt_wsize, "wsize=%s" },
158 { Opt_bsize, "bsize=%s" },
159 { Opt_timeo, "timeo=%s" },
160 { Opt_retrans, "retrans=%s" },
161 { Opt_acregmin, "acregmin=%s" },
162 { Opt_acregmax, "acregmax=%s" },
163 { Opt_acdirmin, "acdirmin=%s" },
164 { Opt_acdirmax, "acdirmax=%s" },
165 { Opt_actimeo, "actimeo=%s" },
166 { Opt_namelen, "namlen=%s" },
167 { Opt_mountport, "mountport=%s" },
168 { Opt_mountvers, "mountvers=%s" },
Trond Myklebust0d71b052012-03-02 13:59:49 -0500169 { Opt_minorversion, "minorversion=%s" },
170
Chuck Levera5a16ba2009-06-17 18:02:14 -0700171 { Opt_nfsvers, "nfsvers=%s" },
172 { Opt_nfsvers, "vers=%s" },
Chuck Leverbf0fd762007-07-01 12:13:44 -0400173
174 { Opt_sec, "sec=%s" },
175 { Opt_proto, "proto=%s" },
176 { Opt_mountproto, "mountproto=%s" },
177 { Opt_addr, "addr=%s" },
178 { Opt_clientaddr, "clientaddr=%s" },
Chuck Lever33832032007-12-10 14:59:13 -0500179 { Opt_mounthost, "mounthost=%s" },
Chuck Lever0ac83772007-09-11 18:01:04 -0400180 { Opt_mountaddr, "mountaddr=%s" },
Chuck Leverbf0fd762007-07-01 12:13:44 -0400181
Trond Myklebust7973c1f12008-07-15 17:58:14 -0400182 { Opt_lookupcache, "lookupcache=%s" },
Chuck Levera6d5ff62010-05-07 13:33:58 -0400183 { Opt_fscache_uniq, "fsc=%s" },
Suresh Jayaraman5eebde22010-09-23 08:55:58 -0400184 { Opt_local_lock, "local_lock=%s" },
Trond Myklebust7973c1f12008-07-15 17:58:14 -0400185
Trond Myklebust38622792012-03-02 14:06:39 -0500186 /* The following needs to be listed after all other options */
187 { Opt_nfsvers, "v%s" },
188
Chuck Leverbf0fd762007-07-01 12:13:44 -0400189 { Opt_err, NULL }
190};
191
192enum {
Jeff Laytonee671b02009-12-03 15:58:56 -0500193 Opt_xprt_udp, Opt_xprt_udp6, Opt_xprt_tcp, Opt_xprt_tcp6, Opt_xprt_rdma,
Chuck Leverbf0fd762007-07-01 12:13:44 -0400194
195 Opt_xprt_err
196};
197
Steven Whitehousea447c092008-10-13 10:46:57 +0100198static const match_table_t nfs_xprt_protocol_tokens = {
Chuck Leverbf0fd762007-07-01 12:13:44 -0400199 { Opt_xprt_udp, "udp" },
Jeff Laytonee671b02009-12-03 15:58:56 -0500200 { Opt_xprt_udp6, "udp6" },
Chuck Leverbf0fd762007-07-01 12:13:44 -0400201 { Opt_xprt_tcp, "tcp" },
Jeff Laytonee671b02009-12-03 15:58:56 -0500202 { Opt_xprt_tcp6, "tcp6" },
\"Talpey, Thomas\2cf7ff72007-09-10 13:49:41 -0400203 { Opt_xprt_rdma, "rdma" },
Chuck Leverbf0fd762007-07-01 12:13:44 -0400204
205 { Opt_xprt_err, NULL }
206};
207
208enum {
209 Opt_sec_none, Opt_sec_sys,
210 Opt_sec_krb5, Opt_sec_krb5i, Opt_sec_krb5p,
211 Opt_sec_lkey, Opt_sec_lkeyi, Opt_sec_lkeyp,
212 Opt_sec_spkm, Opt_sec_spkmi, Opt_sec_spkmp,
213
214 Opt_sec_err
215};
216
Steven Whitehousea447c092008-10-13 10:46:57 +0100217static const match_table_t nfs_secflavor_tokens = {
Chuck Leverbf0fd762007-07-01 12:13:44 -0400218 { Opt_sec_none, "none" },
219 { Opt_sec_none, "null" },
220 { Opt_sec_sys, "sys" },
221
222 { Opt_sec_krb5, "krb5" },
223 { Opt_sec_krb5i, "krb5i" },
224 { Opt_sec_krb5p, "krb5p" },
225
226 { Opt_sec_lkey, "lkey" },
227 { Opt_sec_lkeyi, "lkeyi" },
228 { Opt_sec_lkeyp, "lkeyp" },
229
Olga Kornievskaia8d042212008-02-13 16:47:06 -0500230 { Opt_sec_spkm, "spkm3" },
231 { Opt_sec_spkmi, "spkm3i" },
232 { Opt_sec_spkmp, "spkm3p" },
233
Chuck Leverbf0fd762007-07-01 12:13:44 -0400234 { Opt_sec_err, NULL }
235};
236
Trond Myklebust7973c1f12008-07-15 17:58:14 -0400237enum {
238 Opt_lookupcache_all, Opt_lookupcache_positive,
239 Opt_lookupcache_none,
240
241 Opt_lookupcache_err
242};
243
244static match_table_t nfs_lookupcache_tokens = {
245 { Opt_lookupcache_all, "all" },
246 { Opt_lookupcache_positive, "pos" },
247 { Opt_lookupcache_positive, "positive" },
248 { Opt_lookupcache_none, "none" },
249
250 { Opt_lookupcache_err, NULL }
251};
252
Suresh Jayaraman5eebde22010-09-23 08:55:58 -0400253enum {
254 Opt_local_lock_all, Opt_local_lock_flock, Opt_local_lock_posix,
255 Opt_local_lock_none,
256
257 Opt_local_lock_err
258};
259
260static match_table_t nfs_local_lock_tokens = {
261 { Opt_local_lock_all, "all" },
262 { Opt_local_lock_flock, "flock" },
263 { Opt_local_lock_posix, "posix" },
264 { Opt_local_lock_none, "none" },
265
266 { Opt_local_lock_err, NULL }
267};
268
Trond Myklebust0d71b052012-03-02 13:59:49 -0500269enum {
270 Opt_vers_2, Opt_vers_3, Opt_vers_4, Opt_vers_4_0,
Steve Dickson42c2c422013-05-22 12:50:38 -0400271 Opt_vers_4_1, Opt_vers_4_2,
Trond Myklebust0d71b052012-03-02 13:59:49 -0500272
273 Opt_vers_err
274};
275
276static match_table_t nfs_vers_tokens = {
277 { Opt_vers_2, "2" },
278 { Opt_vers_3, "3" },
279 { Opt_vers_4, "4" },
280 { Opt_vers_4_0, "4.0" },
281 { Opt_vers_4_1, "4.1" },
Steve Dickson42c2c422013-05-22 12:50:38 -0400282 { Opt_vers_4_2, "4.2" },
Trond Myklebust0d71b052012-03-02 13:59:49 -0500283
284 { Opt_vers_err, NULL }
285};
Chuck Leverbf0fd762007-07-01 12:13:44 -0400286
Al Viro31f43472010-10-29 03:38:12 -0400287static struct dentry *nfs_xdev_mount(struct file_system_type *fs_type,
288 int flags, const char *dev_name, void *raw_data);
David Howellsf7b422b2006-06-09 09:34:33 -0400289
Bryan Schumakerab7017a2012-07-30 16:05:16 -0400290struct file_system_type nfs_fs_type = {
David Howellsf7b422b2006-06-09 09:34:33 -0400291 .owner = THIS_MODULE,
292 .name = "nfs",
Al Viro01194982011-03-16 07:25:36 -0400293 .mount = nfs_fs_mount,
David Howellsf7b422b2006-06-09 09:34:33 -0400294 .kill_sb = nfs_kill_super,
Jeff Laytonecf3d1f2013-02-20 11:19:05 -0500295 .fs_flags = FS_RENAME_DOES_D_MOVE|FS_BINARY_MOUNTDATA,
David Howellsf7b422b2006-06-09 09:34:33 -0400296};
Eric W. Biederman7f78e032013-03-02 19:39:14 -0800297MODULE_ALIAS_FS("nfs");
Bryan Schumakerddda8e02012-07-30 16:05:23 -0400298EXPORT_SYMBOL_GPL(nfs_fs_type);
David Howellsf7b422b2006-06-09 09:34:33 -0400299
David Howells54ceac42006-08-22 20:06:13 -0400300struct file_system_type nfs_xdev_fs_type = {
David Howellsf7b422b2006-06-09 09:34:33 -0400301 .owner = THIS_MODULE,
302 .name = "nfs",
Al Viro31f43472010-10-29 03:38:12 -0400303 .mount = nfs_xdev_mount,
David Howellsf7b422b2006-06-09 09:34:33 -0400304 .kill_sb = nfs_kill_super,
Jeff Laytonecf3d1f2013-02-20 11:19:05 -0500305 .fs_flags = FS_RENAME_DOES_D_MOVE|FS_BINARY_MOUNTDATA,
David Howellsf7b422b2006-06-09 09:34:33 -0400306};
307
Bryan Schumaker6a744902012-07-30 16:05:20 -0400308const struct super_operations nfs_sops = {
David Howellsf7b422b2006-06-09 09:34:33 -0400309 .alloc_inode = nfs_alloc_inode,
310 .destroy_inode = nfs_destroy_inode,
311 .write_inode = nfs_write_inode,
Trond Myklebusteed99352012-12-14 14:36:36 -0500312 .drop_inode = nfs_drop_inode,
David Howellsf7b422b2006-06-09 09:34:33 -0400313 .statfs = nfs_statfs,
Al Virob57922d2010-06-07 14:34:48 -0400314 .evict_inode = nfs_evict_inode,
David Howellsf7b422b2006-06-09 09:34:33 -0400315 .umount_begin = nfs_umount_begin,
316 .show_options = nfs_show_options,
Al Viroc7f404b2011-03-16 06:59:40 -0400317 .show_devname = nfs_show_devname,
318 .show_path = nfs_show_path,
David Howellsf7b422b2006-06-09 09:34:33 -0400319 .show_stats = nfs_show_stats,
Jeff Layton48b605f2008-06-10 15:38:39 -0400320 .remount_fs = nfs_remount,
David Howellsf7b422b2006-06-09 09:34:33 -0400321};
Bryan Schumakerddda8e02012-07-30 16:05:23 -0400322EXPORT_SYMBOL_GPL(nfs_sops);
David Howellsf7b422b2006-06-09 09:34:33 -0400323
Bryan Schumaker89d77c82012-07-30 16:05:25 -0400324#if IS_ENABLED(CONFIG_NFS_V4)
Bryan Schumakerb72e4f42012-05-10 15:07:40 -0400325static void nfs4_validate_mount_flags(struct nfs_parsed_mount_data *);
Bryan Schumakerd72c7272012-05-10 15:07:41 -0400326static int nfs4_validate_mount_data(void *options,
327 struct nfs_parsed_mount_data *args, const char *dev_name);
bjschuma@gmail.com1ae811e2012-08-08 13:57:06 -0400328
329struct file_system_type nfs4_fs_type = {
330 .owner = THIS_MODULE,
331 .name = "nfs4",
332 .mount = nfs_fs_mount,
333 .kill_sb = nfs_kill_super,
Jeff Laytonecf3d1f2013-02-20 11:19:05 -0500334 .fs_flags = FS_RENAME_DOES_D_MOVE|FS_BINARY_MOUNTDATA,
bjschuma@gmail.com1ae811e2012-08-08 13:57:06 -0400335};
Eric W. Biederman7f78e032013-03-02 19:39:14 -0800336MODULE_ALIAS_FS("nfs4");
Eric W. Biedermanfa7614dd2013-03-12 18:27:41 -0700337MODULE_ALIAS("nfs4");
bjschuma@gmail.com1ae811e2012-08-08 13:57:06 -0400338EXPORT_SYMBOL_GPL(nfs4_fs_type);
339
340static int __init register_nfs4_fs(void)
341{
342 return register_filesystem(&nfs4_fs_type);
343}
344
345static void unregister_nfs4_fs(void)
346{
347 unregister_filesystem(&nfs4_fs_type);
348}
349#else
350static int __init register_nfs4_fs(void)
351{
352 return 0;
353}
354
355static void unregister_nfs4_fs(void)
356{
357}
David Howellsf7b422b2006-06-09 09:34:33 -0400358#endif
359
Rusty Russell8e1f9362007-07-17 04:03:17 -0700360static struct shrinker acl_shrinker = {
Dave Chinner1ab6c492013-08-28 10:18:09 +1000361 .count_objects = nfs_access_cache_count,
362 .scan_objects = nfs_access_cache_scan,
Rusty Russell8e1f9362007-07-17 04:03:17 -0700363 .seeks = DEFAULT_SEEKS,
364};
Trond Myklebust979df722006-07-25 11:28:19 -0400365
David Howellsf7b422b2006-06-09 09:34:33 -0400366/*
367 * Register the NFS filesystems
368 */
369int __init register_nfs_fs(void)
370{
371 int ret;
372
373 ret = register_filesystem(&nfs_fs_type);
374 if (ret < 0)
375 goto error_0;
376
bjschuma@gmail.com1ae811e2012-08-08 13:57:06 -0400377 ret = register_nfs4_fs();
David Howellsf7b422b2006-06-09 09:34:33 -0400378 if (ret < 0)
379 goto error_1;
bjschuma@gmail.com1ae811e2012-08-08 13:57:06 -0400380
381 ret = nfs_register_sysctl();
382 if (ret < 0)
383 goto error_2;
Kinglong Mee5ef8d792015-07-30 21:41:08 +0800384 ret = register_shrinker(&acl_shrinker);
385 if (ret < 0)
386 goto error_3;
David Howellsf7b422b2006-06-09 09:34:33 -0400387 return 0;
Kinglong Mee5ef8d792015-07-30 21:41:08 +0800388error_3:
389 nfs_unregister_sysctl();
bjschuma@gmail.com1ae811e2012-08-08 13:57:06 -0400390error_2:
391 unregister_nfs4_fs();
David Howellsf7b422b2006-06-09 09:34:33 -0400392error_1:
393 unregister_filesystem(&nfs_fs_type);
David Howellsf7b422b2006-06-09 09:34:33 -0400394error_0:
395 return ret;
396}
397
398/*
399 * Unregister the NFS filesystems
400 */
401void __exit unregister_nfs_fs(void)
402{
Rusty Russell8e1f9362007-07-17 04:03:17 -0700403 unregister_shrinker(&acl_shrinker);
Alexey Dobriyan49af7ee2007-09-18 22:46:40 -0700404 nfs_unregister_sysctl();
bjschuma@gmail.com1ae811e2012-08-08 13:57:06 -0400405 unregister_nfs4_fs();
David Howellsf7b422b2006-06-09 09:34:33 -0400406 unregister_filesystem(&nfs_fs_type);
407}
408
Trond Myklebustea7c38f2015-02-05 15:13:24 -0500409bool nfs_sb_active(struct super_block *sb)
Steve Dicksonef818a22007-11-08 04:05:04 -0500410{
411 struct nfs_server *server = NFS_SB(sb);
Trond Myklebust1daef0a2008-07-27 18:19:01 -0400412
Trond Myklebustea7c38f2015-02-05 15:13:24 -0500413 if (!atomic_inc_not_zero(&sb->s_active))
414 return false;
415 if (atomic_inc_return(&server->active) != 1)
416 atomic_dec(&sb->s_active);
417 return true;
Trond Myklebust1daef0a2008-07-27 18:19:01 -0400418}
Bryan Schumaker89d77c82012-07-30 16:05:25 -0400419EXPORT_SYMBOL_GPL(nfs_sb_active);
Trond Myklebust1daef0a2008-07-27 18:19:01 -0400420
421void nfs_sb_deactive(struct super_block *sb)
422{
423 struct nfs_server *server = NFS_SB(sb);
424
425 if (atomic_dec_and_test(&server->active))
426 deactivate_super(sb);
Steve Dicksonef818a22007-11-08 04:05:04 -0500427}
Bryan Schumaker89d77c82012-07-30 16:05:25 -0400428EXPORT_SYMBOL_GPL(nfs_sb_deactive);
Steve Dicksonef818a22007-11-08 04:05:04 -0500429
David Howellsf7b422b2006-06-09 09:34:33 -0400430/*
431 * Deliver file system statistics to userspace
432 */
Bryan Schumakerfbdefd62012-07-16 16:39:20 -0400433int nfs_statfs(struct dentry *dentry, struct kstatfs *buf)
David Howellsf7b422b2006-06-09 09:34:33 -0400434{
David Howells0c7d90c2006-08-22 20:06:10 -0400435 struct nfs_server *server = NFS_SB(dentry->d_sb);
David Howellsf7b422b2006-06-09 09:34:33 -0400436 unsigned char blockbits;
437 unsigned long blockres;
David Howells2b0143b2015-03-17 22:25:59 +0000438 struct nfs_fh *fh = NFS_FH(d_inode(dentry));
Trond Myklebustca7e9a02010-04-16 16:22:52 -0400439 struct nfs_fsstat res;
440 int error = -ENOMEM;
441
442 res.fattr = nfs_alloc_fattr();
443 if (res.fattr == NULL)
444 goto out_err;
David Howellsf7b422b2006-06-09 09:34:33 -0400445
David Howells8fa5c002006-08-22 20:06:12 -0400446 error = server->nfs_client->rpc_ops->statfs(server, fh, &res);
Menyhart Zoltanfbf3fdd2010-09-12 19:55:26 -0400447 if (unlikely(error == -ESTALE)) {
448 struct dentry *pd_dentry;
Trond Myklebustca7e9a02010-04-16 16:22:52 -0400449
Menyhart Zoltanfbf3fdd2010-09-12 19:55:26 -0400450 pd_dentry = dget_parent(dentry);
451 if (pd_dentry != NULL) {
David Howells2b0143b2015-03-17 22:25:59 +0000452 nfs_zap_caches(d_inode(pd_dentry));
Menyhart Zoltanfbf3fdd2010-09-12 19:55:26 -0400453 dput(pd_dentry);
454 }
455 }
Trond Myklebustca7e9a02010-04-16 16:22:52 -0400456 nfs_free_fattr(res.fattr);
David Howellsf7b422b2006-06-09 09:34:33 -0400457 if (error < 0)
458 goto out_err;
Trond Myklebustca7e9a02010-04-16 16:22:52 -0400459
Amnon Aaronsohn1a0ba9a2007-04-09 22:05:26 -0700460 buf->f_type = NFS_SUPER_MAGIC;
David Howellsf7b422b2006-06-09 09:34:33 -0400461
462 /*
463 * Current versions of glibc do not correctly handle the
464 * case where f_frsize != f_bsize. Eventually we want to
465 * report the value of wtmult in this field.
466 */
David Howells0c7d90c2006-08-22 20:06:10 -0400467 buf->f_frsize = dentry->d_sb->s_blocksize;
David Howellsf7b422b2006-06-09 09:34:33 -0400468
469 /*
470 * On most *nix systems, f_blocks, f_bfree, and f_bavail
471 * are reported in units of f_frsize. Linux hasn't had
472 * an f_frsize field in its statfs struct until recently,
473 * thus historically Linux's sys_statfs reports these
474 * fields in units of f_bsize.
475 */
David Howells0c7d90c2006-08-22 20:06:10 -0400476 buf->f_bsize = dentry->d_sb->s_blocksize;
477 blockbits = dentry->d_sb->s_blocksize_bits;
David Howellsf7b422b2006-06-09 09:34:33 -0400478 blockres = (1 << blockbits) - 1;
479 buf->f_blocks = (res.tbytes + blockres) >> blockbits;
480 buf->f_bfree = (res.fbytes + blockres) >> blockbits;
481 buf->f_bavail = (res.abytes + blockres) >> blockbits;
482
483 buf->f_files = res.tfiles;
484 buf->f_ffree = res.afiles;
485
486 buf->f_namelen = server->namelen;
Amnon Aaronsohn1a0ba9a2007-04-09 22:05:26 -0700487
David Howellsf7b422b2006-06-09 09:34:33 -0400488 return 0;
489
490 out_err:
Harvey Harrison3110ff82008-05-02 13:42:44 -0700491 dprintk("%s: statfs error = %d\n", __func__, -error);
Amnon Aaronsohn1a0ba9a2007-04-09 22:05:26 -0700492 return error;
David Howellsf7b422b2006-06-09 09:34:33 -0400493}
Bryan Schumaker89d77c82012-07-30 16:05:25 -0400494EXPORT_SYMBOL_GPL(nfs_statfs);
David Howellsf7b422b2006-06-09 09:34:33 -0400495
David Howells7d4e2742006-08-22 20:06:07 -0400496/*
497 * Map the security flavour number to a name
498 */
Trond Myklebust81039f12006-06-09 09:34:34 -0400499static const char *nfs_pseudoflavour_to_name(rpc_authflavor_t flavour)
500{
David Howells7d4e2742006-08-22 20:06:07 -0400501 static const struct {
Trond Myklebust81039f12006-06-09 09:34:34 -0400502 rpc_authflavor_t flavour;
503 const char *str;
Weston Andros Adamson4d4b69d2013-10-18 15:15:19 -0400504 } sec_flavours[NFS_AUTH_INFO_MAX_FLAVORS] = {
505 /* update NFS_AUTH_INFO_MAX_FLAVORS when this list changes! */
Trond Myklebust81039f12006-06-09 09:34:34 -0400506 { RPC_AUTH_NULL, "null" },
507 { RPC_AUTH_UNIX, "sys" },
508 { RPC_AUTH_GSS_KRB5, "krb5" },
509 { RPC_AUTH_GSS_KRB5I, "krb5i" },
510 { RPC_AUTH_GSS_KRB5P, "krb5p" },
511 { RPC_AUTH_GSS_LKEY, "lkey" },
512 { RPC_AUTH_GSS_LKEYI, "lkeyi" },
513 { RPC_AUTH_GSS_LKEYP, "lkeyp" },
514 { RPC_AUTH_GSS_SPKM, "spkm" },
515 { RPC_AUTH_GSS_SPKMI, "spkmi" },
516 { RPC_AUTH_GSS_SPKMP, "spkmp" },
Chuck Lever4d81cd12007-07-01 12:12:40 -0400517 { UINT_MAX, "unknown" }
Trond Myklebust81039f12006-06-09 09:34:34 -0400518 };
519 int i;
520
Chuck Lever4d81cd12007-07-01 12:12:40 -0400521 for (i = 0; sec_flavours[i].flavour != UINT_MAX; i++) {
Trond Myklebust81039f12006-06-09 09:34:34 -0400522 if (sec_flavours[i].flavour == flavour)
523 break;
524 }
525 return sec_flavours[i].str;
526}
527
Jeff Laytonee671b02009-12-03 15:58:56 -0500528static void nfs_show_mountd_netid(struct seq_file *m, struct nfs_server *nfss,
529 int showdefaults)
530{
531 struct sockaddr *sap = (struct sockaddr *) &nfss->mountd_address;
532
533 seq_printf(m, ",mountproto=");
534 switch (sap->sa_family) {
535 case AF_INET:
536 switch (nfss->mountd_protocol) {
537 case IPPROTO_UDP:
538 seq_printf(m, RPCBIND_NETID_UDP);
539 break;
540 case IPPROTO_TCP:
541 seq_printf(m, RPCBIND_NETID_TCP);
542 break;
543 default:
544 if (showdefaults)
545 seq_printf(m, "auto");
546 }
547 break;
548 case AF_INET6:
549 switch (nfss->mountd_protocol) {
550 case IPPROTO_UDP:
551 seq_printf(m, RPCBIND_NETID_UDP6);
552 break;
553 case IPPROTO_TCP:
554 seq_printf(m, RPCBIND_NETID_TCP6);
555 break;
556 default:
557 if (showdefaults)
558 seq_printf(m, "auto");
559 }
560 break;
561 default:
562 if (showdefaults)
563 seq_printf(m, "auto");
564 }
565}
566
Chuck Lever82d101d2008-03-14 14:10:37 -0400567static void nfs_show_mountd_options(struct seq_file *m, struct nfs_server *nfss,
568 int showdefaults)
569{
570 struct sockaddr *sap = (struct sockaddr *)&nfss->mountd_address;
571
Bryan Schumakerd5eff1a2010-08-03 13:04:00 -0400572 if (nfss->flags & NFS_MOUNT_LEGACY_INTERFACE)
573 return;
574
Chuck Lever82d101d2008-03-14 14:10:37 -0400575 switch (sap->sa_family) {
576 case AF_INET: {
577 struct sockaddr_in *sin = (struct sockaddr_in *)sap;
Harvey Harrisonbe859402008-10-31 00:56:28 -0700578 seq_printf(m, ",mountaddr=%pI4", &sin->sin_addr.s_addr);
Chuck Lever82d101d2008-03-14 14:10:37 -0400579 break;
580 }
581 case AF_INET6: {
582 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sap;
Chuck Leverd250e192009-12-03 15:58:56 -0500583 seq_printf(m, ",mountaddr=%pI6c", &sin6->sin6_addr);
Chuck Lever82d101d2008-03-14 14:10:37 -0400584 break;
585 }
586 default:
587 if (showdefaults)
588 seq_printf(m, ",mountaddr=unspecified");
589 }
590
591 if (nfss->mountd_version || showdefaults)
592 seq_printf(m, ",mountvers=%u", nfss->mountd_version);
Stanislav Kinsburskyaa699472010-12-08 12:40:13 +0300593 if ((nfss->mountd_port &&
594 nfss->mountd_port != (unsigned short)NFS_UNSPEC_PORT) ||
595 showdefaults)
Chuck Lever82d101d2008-03-14 14:10:37 -0400596 seq_printf(m, ",mountport=%u", nfss->mountd_port);
597
Jeff Laytonee671b02009-12-03 15:58:56 -0500598 nfs_show_mountd_netid(m, nfss, showdefaults);
Chuck Lever82d101d2008-03-14 14:10:37 -0400599}
600
Bryan Schumaker89d77c82012-07-30 16:05:25 -0400601#if IS_ENABLED(CONFIG_NFS_V4)
Trond Myklebust0be81892010-06-18 12:23:58 -0400602static void nfs_show_nfsv4_options(struct seq_file *m, struct nfs_server *nfss,
603 int showdefaults)
604{
605 struct nfs_client *clp = nfss->nfs_client;
606
607 seq_printf(m, ",clientaddr=%s", clp->cl_ipaddr);
Trond Myklebust0be81892010-06-18 12:23:58 -0400608}
609#else
610static void nfs_show_nfsv4_options(struct seq_file *m, struct nfs_server *nfss,
611 int showdefaults)
612{
613}
614#endif
615
Trond Myklebust7bbceb62012-03-02 14:00:20 -0500616static void nfs_show_nfs_version(struct seq_file *m,
617 unsigned int version,
618 unsigned int minorversion)
619{
620 seq_printf(m, ",vers=%u", version);
621 if (version == 4)
622 seq_printf(m, ".%u", minorversion);
623}
624
David Howellsf7b422b2006-06-09 09:34:33 -0400625/*
626 * Describe the mount options in force on this server representation
627 */
Chuck Lever82d101d2008-03-14 14:10:37 -0400628static void nfs_show_mount_options(struct seq_file *m, struct nfs_server *nfss,
629 int showdefaults)
David Howellsf7b422b2006-06-09 09:34:33 -0400630{
David Howells509de812006-08-22 20:06:11 -0400631 static const struct proc_nfs_info {
David Howellsf7b422b2006-06-09 09:34:33 -0400632 int flag;
David Howells509de812006-08-22 20:06:11 -0400633 const char *str;
634 const char *nostr;
David Howellsf7b422b2006-06-09 09:34:33 -0400635 } nfs_info[] = {
636 { NFS_MOUNT_SOFT, ",soft", ",hard" },
Chuck Lever82d101d2008-03-14 14:10:37 -0400637 { NFS_MOUNT_POSIX, ",posix", "" },
David Howellsf7b422b2006-06-09 09:34:33 -0400638 { NFS_MOUNT_NOCTO, ",nocto", "" },
639 { NFS_MOUNT_NOAC, ",noac", "" },
640 { NFS_MOUNT_NONLM, ",nolock", "" },
641 { NFS_MOUNT_NOACL, ",noacl", "" },
Steve Dickson74dd34e2007-04-14 17:01:15 -0400642 { NFS_MOUNT_NORDIRPLUS, ",nordirplus", "" },
Chuck Leverd7403512008-12-23 15:21:37 -0500643 { NFS_MOUNT_UNSHARED, ",nosharecache", "" },
644 { NFS_MOUNT_NORESVPORT, ",noresvport", "" },
David Howellsf7b422b2006-06-09 09:34:33 -0400645 { 0, NULL, NULL }
646 };
David Howells509de812006-08-22 20:06:11 -0400647 const struct proc_nfs_info *nfs_infop;
David Howells8fa5c002006-08-22 20:06:12 -0400648 struct nfs_client *clp = nfss->nfs_client;
Chuck Lever82d101d2008-03-14 14:10:37 -0400649 u32 version = clp->rpc_ops->version;
Suresh Jayaraman7c563cc2010-09-23 14:26:48 -0400650 int local_flock, local_fcntl;
David Howellsf7b422b2006-06-09 09:34:33 -0400651
Trond Myklebust7bbceb62012-03-02 14:00:20 -0500652 nfs_show_nfs_version(m, version, clp->cl_minorversion);
Chuck Lever2d767432008-03-14 14:10:08 -0400653 seq_printf(m, ",rsize=%u", nfss->rsize);
654 seq_printf(m, ",wsize=%u", nfss->wsize);
Chuck Lever82d101d2008-03-14 14:10:37 -0400655 if (nfss->bsize != 0)
656 seq_printf(m, ",bsize=%u", nfss->bsize);
657 seq_printf(m, ",namlen=%u", nfss->namelen);
Chuck Lever0e0cab72008-06-26 17:47:12 -0400658 if (nfss->acregmin != NFS_DEF_ACREGMIN*HZ || showdefaults)
Chuck Lever2d767432008-03-14 14:10:08 -0400659 seq_printf(m, ",acregmin=%u", nfss->acregmin/HZ);
Chuck Lever0e0cab72008-06-26 17:47:12 -0400660 if (nfss->acregmax != NFS_DEF_ACREGMAX*HZ || showdefaults)
Chuck Lever2d767432008-03-14 14:10:08 -0400661 seq_printf(m, ",acregmax=%u", nfss->acregmax/HZ);
Chuck Lever0e0cab72008-06-26 17:47:12 -0400662 if (nfss->acdirmin != NFS_DEF_ACDIRMIN*HZ || showdefaults)
Chuck Lever2d767432008-03-14 14:10:08 -0400663 seq_printf(m, ",acdirmin=%u", nfss->acdirmin/HZ);
Chuck Lever0e0cab72008-06-26 17:47:12 -0400664 if (nfss->acdirmax != NFS_DEF_ACDIRMAX*HZ || showdefaults)
Chuck Lever2d767432008-03-14 14:10:08 -0400665 seq_printf(m, ",acdirmax=%u", nfss->acdirmax/HZ);
David Howellsf7b422b2006-06-09 09:34:33 -0400666 for (nfs_infop = nfs_info; nfs_infop->flag; nfs_infop++) {
667 if (nfss->flags & nfs_infop->flag)
668 seq_puts(m, nfs_infop->str);
669 else
670 seq_puts(m, nfs_infop->nostr);
671 }
Trond Myklebust2446ab62012-03-01 17:00:56 -0500672 rcu_read_lock();
\"Talpey, Thomas\56928ed2007-09-10 13:48:47 -0400673 seq_printf(m, ",proto=%s",
Jeff Laytonee671b02009-12-03 15:58:56 -0500674 rpc_peeraddr2str(nfss->client, RPC_DISPLAY_NETID));
Trond Myklebust2446ab62012-03-01 17:00:56 -0500675 rcu_read_unlock();
Chuck Lever82d101d2008-03-14 14:10:37 -0400676 if (version == 4) {
677 if (nfss->port != NFS_PORT)
678 seq_printf(m, ",port=%u", nfss->port);
679 } else
680 if (nfss->port)
681 seq_printf(m, ",port=%u", nfss->port);
682
Trond Myklebust33170232007-12-20 16:03:59 -0500683 seq_printf(m, ",timeo=%lu", 10U * nfss->client->cl_timeout->to_initval / HZ);
684 seq_printf(m, ",retrans=%u", nfss->client->cl_timeout->to_retries);
Trond Myklebust81039f12006-06-09 09:34:34 -0400685 seq_printf(m, ",sec=%s", nfs_pseudoflavour_to_name(nfss->client->cl_auth->au_flavor));
Chuck Lever82d101d2008-03-14 14:10:37 -0400686
687 if (version != 4)
688 nfs_show_mountd_options(m, nfss, showdefaults);
Trond Myklebust0be81892010-06-18 12:23:58 -0400689 else
690 nfs_show_nfsv4_options(m, nfss, showdefaults);
Chuck Lever82d101d2008-03-14 14:10:37 -0400691
David Howellsb797cac2009-04-03 16:42:48 +0100692 if (nfss->options & NFS_OPTION_FSCACHE)
693 seq_printf(m, ",fsc");
Patrick J. LoPresti9b00c642010-08-10 17:28:01 -0400694
Chuck Lever89652612012-09-14 17:24:11 -0400695 if (nfss->options & NFS_OPTION_MIGRATION)
696 seq_printf(m, ",migration");
697
Patrick J. LoPresti9b00c642010-08-10 17:28:01 -0400698 if (nfss->flags & NFS_MOUNT_LOOKUP_CACHE_NONEG) {
699 if (nfss->flags & NFS_MOUNT_LOOKUP_CACHE_NONE)
700 seq_printf(m, ",lookupcache=none");
701 else
702 seq_printf(m, ",lookupcache=pos");
703 }
Suresh Jayaraman7c563cc2010-09-23 14:26:48 -0400704
705 local_flock = nfss->flags & NFS_MOUNT_LOCAL_FLOCK;
706 local_fcntl = nfss->flags & NFS_MOUNT_LOCAL_FCNTL;
707
708 if (!local_flock && !local_fcntl)
709 seq_printf(m, ",local_lock=none");
710 else if (local_flock && local_fcntl)
711 seq_printf(m, ",local_lock=all");
712 else if (local_flock)
713 seq_printf(m, ",local_lock=flock");
714 else
715 seq_printf(m, ",local_lock=posix");
David Howellsf7b422b2006-06-09 09:34:33 -0400716}
717
718/*
719 * Describe the mount options on this VFS mountpoint
720 */
Bryan Schumakerfbdefd62012-07-16 16:39:20 -0400721int nfs_show_options(struct seq_file *m, struct dentry *root)
David Howellsf7b422b2006-06-09 09:34:33 -0400722{
Al Viro34c80b12011-12-08 21:32:45 -0500723 struct nfs_server *nfss = NFS_SB(root->d_sb);
David Howellsf7b422b2006-06-09 09:34:33 -0400724
725 nfs_show_mount_options(m, nfss, 0);
726
Trond Myklebust2446ab62012-03-01 17:00:56 -0500727 rcu_read_lock();
Chuck Lever5d8515c2007-12-10 14:57:16 -0500728 seq_printf(m, ",addr=%s",
729 rpc_peeraddr2str(nfss->nfs_client->cl_rpcclient,
730 RPC_DISPLAY_ADDR));
Trond Myklebust2446ab62012-03-01 17:00:56 -0500731 rcu_read_unlock();
David Howellsf7b422b2006-06-09 09:34:33 -0400732
733 return 0;
734}
Bryan Schumaker89d77c82012-07-30 16:05:25 -0400735EXPORT_SYMBOL_GPL(nfs_show_options);
H Hartley Sweeten45402c382011-09-02 14:39:12 -0700736
Bryan Schumaker89d77c82012-07-30 16:05:25 -0400737#if IS_ENABLED(CONFIG_NFS_V4)
J. Bruce Fieldsae50c0b2011-05-22 19:48:21 +0300738#ifdef CONFIG_NFS_V4_1
H Hartley Sweeten45402c382011-09-02 14:39:12 -0700739static void show_sessions(struct seq_file *m, struct nfs_server *server)
J. Bruce Fieldsae50c0b2011-05-22 19:48:21 +0300740{
741 if (nfs4_has_session(server->nfs_client))
742 seq_printf(m, ",sessions");
743}
744#else
H Hartley Sweeten45402c382011-09-02 14:39:12 -0700745static void show_sessions(struct seq_file *m, struct nfs_server *server) {}
746#endif
J. Bruce Fieldsae50c0b2011-05-22 19:48:21 +0300747#endif
748
749#ifdef CONFIG_NFS_V4_1
H Hartley Sweeten45402c382011-09-02 14:39:12 -0700750static void show_pnfs(struct seq_file *m, struct nfs_server *server)
J. Bruce Fieldsae50c0b2011-05-22 19:48:21 +0300751{
752 seq_printf(m, ",pnfs=");
753 if (server->pnfs_curr_ld)
754 seq_printf(m, "%s", server->pnfs_curr_ld->name);
755 else
756 seq_printf(m, "not configured");
757}
Trond Myklebust7e03b7c2012-03-04 18:12:57 -0500758
759static void show_implementation_id(struct seq_file *m, struct nfs_server *nfss)
760{
Chuck Lever59155542012-05-21 22:44:41 -0400761 if (nfss->nfs_client && nfss->nfs_client->cl_implid) {
762 struct nfs41_impl_id *impl_id = nfss->nfs_client->cl_implid;
Trond Myklebust7e03b7c2012-03-04 18:12:57 -0500763 seq_printf(m, "\n\timpl_id:\tname='%s',domain='%s',"
764 "date='%llu,%u'",
765 impl_id->name, impl_id->domain,
766 impl_id->date.seconds, impl_id->date.nseconds);
767 }
768}
H Hartley Sweeten45402c382011-09-02 14:39:12 -0700769#else
Bryan Schumaker89d77c82012-07-30 16:05:25 -0400770#if IS_ENABLED(CONFIG_NFS_V4)
Trond Myklebust7e03b7c2012-03-04 18:12:57 -0500771static void show_pnfs(struct seq_file *m, struct nfs_server *server)
772{
773}
H Hartley Sweeten45402c382011-09-02 14:39:12 -0700774#endif
Trond Myklebust7e03b7c2012-03-04 18:12:57 -0500775static void show_implementation_id(struct seq_file *m, struct nfs_server *nfss)
776{
777}
H Hartley Sweeten45402c382011-09-02 14:39:12 -0700778#endif
David Howellsf7b422b2006-06-09 09:34:33 -0400779
Bryan Schumakerfbdefd62012-07-16 16:39:20 -0400780int nfs_show_devname(struct seq_file *m, struct dentry *root)
Al Viroc7f404b2011-03-16 06:59:40 -0400781{
782 char *page = (char *) __get_free_page(GFP_KERNEL);
783 char *devname, *dummy;
784 int err = 0;
785 if (!page)
786 return -ENOMEM;
Ben Hutchings97a54862012-10-21 19:23:52 +0100787 devname = nfs_path(&dummy, root, page, PAGE_SIZE, 0);
Al Viroc7f404b2011-03-16 06:59:40 -0400788 if (IS_ERR(devname))
789 err = PTR_ERR(devname);
790 else
791 seq_escape(m, devname, " \t\n\\");
792 free_page((unsigned long)page);
793 return err;
794}
Bryan Schumaker89d77c82012-07-30 16:05:25 -0400795EXPORT_SYMBOL_GPL(nfs_show_devname);
Al Viroc7f404b2011-03-16 06:59:40 -0400796
Bryan Schumakerfbdefd62012-07-16 16:39:20 -0400797int nfs_show_path(struct seq_file *m, struct dentry *dentry)
Al Viroc7f404b2011-03-16 06:59:40 -0400798{
799 seq_puts(m, "/");
800 return 0;
801}
Bryan Schumaker89d77c82012-07-30 16:05:25 -0400802EXPORT_SYMBOL_GPL(nfs_show_path);
Al Viroc7f404b2011-03-16 06:59:40 -0400803
David Howellsf7b422b2006-06-09 09:34:33 -0400804/*
805 * Present statistical information for this VFS mountpoint
806 */
Bryan Schumakerfbdefd62012-07-16 16:39:20 -0400807int nfs_show_stats(struct seq_file *m, struct dentry *root)
David Howellsf7b422b2006-06-09 09:34:33 -0400808{
809 int i, cpu;
Al Viro64132372011-12-08 20:51:13 -0500810 struct nfs_server *nfss = NFS_SB(root->d_sb);
David Howellsf7b422b2006-06-09 09:34:33 -0400811 struct rpc_auth *auth = nfss->client->cl_auth;
812 struct nfs_iostats totals = { };
813
814 seq_printf(m, "statvers=%s", NFS_IOSTAT_VERS);
815
816 /*
817 * Display all mount option settings
818 */
819 seq_printf(m, "\n\topts:\t");
Al Viro64132372011-12-08 20:51:13 -0500820 seq_puts(m, root->d_sb->s_flags & MS_RDONLY ? "ro" : "rw");
821 seq_puts(m, root->d_sb->s_flags & MS_SYNCHRONOUS ? ",sync" : "");
822 seq_puts(m, root->d_sb->s_flags & MS_NOATIME ? ",noatime" : "");
823 seq_puts(m, root->d_sb->s_flags & MS_NODIRATIME ? ",nodiratime" : "");
David Howellsf7b422b2006-06-09 09:34:33 -0400824 nfs_show_mount_options(m, nfss, 1);
825
826 seq_printf(m, "\n\tage:\t%lu", (jiffies - nfss->mount_time) / HZ);
827
Trond Myklebust7e03b7c2012-03-04 18:12:57 -0500828 show_implementation_id(m, nfss);
Weston Andros Adamson7d2ed9a2012-02-17 15:20:26 -0500829
David Howellsf7b422b2006-06-09 09:34:33 -0400830 seq_printf(m, "\n\tcaps:\t");
831 seq_printf(m, "caps=0x%x", nfss->caps);
Chuck Lever2d767432008-03-14 14:10:08 -0400832 seq_printf(m, ",wtmult=%u", nfss->wtmult);
833 seq_printf(m, ",dtsize=%u", nfss->dtsize);
834 seq_printf(m, ",bsize=%u", nfss->bsize);
835 seq_printf(m, ",namlen=%u", nfss->namelen);
David Howellsf7b422b2006-06-09 09:34:33 -0400836
Bryan Schumaker89d77c82012-07-30 16:05:25 -0400837#if IS_ENABLED(CONFIG_NFS_V4)
Trond Myklebust40c553192007-12-14 14:56:07 -0500838 if (nfss->nfs_client->rpc_ops->version == 4) {
David Howellsf7b422b2006-06-09 09:34:33 -0400839 seq_printf(m, "\n\tnfsv4:\t");
840 seq_printf(m, "bm0=0x%x", nfss->attr_bitmask[0]);
841 seq_printf(m, ",bm1=0x%x", nfss->attr_bitmask[1]);
David Quigleya09df2c2013-05-22 12:50:41 -0400842 seq_printf(m, ",bm2=0x%x", nfss->attr_bitmask[2]);
David Howellsf7b422b2006-06-09 09:34:33 -0400843 seq_printf(m, ",acl=0x%x", nfss->acl_bitmask);
J. Bruce Fieldsae50c0b2011-05-22 19:48:21 +0300844 show_sessions(m, nfss);
845 show_pnfs(m, nfss);
David Howellsf7b422b2006-06-09 09:34:33 -0400846 }
847#endif
848
849 /*
850 * Display security flavor in effect for this mount
851 */
Chuck Lever2d767432008-03-14 14:10:08 -0400852 seq_printf(m, "\n\tsec:\tflavor=%u", auth->au_ops->au_flavor);
David Howellsf7b422b2006-06-09 09:34:33 -0400853 if (auth->au_flavor)
Chuck Lever2d767432008-03-14 14:10:08 -0400854 seq_printf(m, ",pseudoflavor=%u", auth->au_flavor);
David Howellsf7b422b2006-06-09 09:34:33 -0400855
856 /*
857 * Display superblock I/O counters
858 */
859 for_each_possible_cpu(cpu) {
860 struct nfs_iostats *stats;
861
862 preempt_disable();
863 stats = per_cpu_ptr(nfss->io_stats, cpu);
864
865 for (i = 0; i < __NFSIOS_COUNTSMAX; i++)
866 totals.events[i] += stats->events[i];
867 for (i = 0; i < __NFSIOS_BYTESMAX; i++)
868 totals.bytes[i] += stats->bytes[i];
David Howells6a510912009-04-03 16:42:43 +0100869#ifdef CONFIG_NFS_FSCACHE
870 for (i = 0; i < __NFSIOS_FSCACHEMAX; i++)
871 totals.fscache[i] += stats->fscache[i];
872#endif
David Howellsf7b422b2006-06-09 09:34:33 -0400873
874 preempt_enable();
875 }
876
877 seq_printf(m, "\n\tevents:\t");
878 for (i = 0; i < __NFSIOS_COUNTSMAX; i++)
879 seq_printf(m, "%lu ", totals.events[i]);
880 seq_printf(m, "\n\tbytes:\t");
881 for (i = 0; i < __NFSIOS_BYTESMAX; i++)
882 seq_printf(m, "%Lu ", totals.bytes[i]);
David Howells6a510912009-04-03 16:42:43 +0100883#ifdef CONFIG_NFS_FSCACHE
884 if (nfss->options & NFS_OPTION_FSCACHE) {
885 seq_printf(m, "\n\tfsc:\t");
886 for (i = 0; i < __NFSIOS_FSCACHEMAX; i++)
887 seq_printf(m, "%Lu ", totals.bytes[i]);
888 }
889#endif
David Howellsf7b422b2006-06-09 09:34:33 -0400890 seq_printf(m, "\n");
891
892 rpc_print_iostats(m, nfss->client);
893
894 return 0;
895}
Bryan Schumaker89d77c82012-07-30 16:05:25 -0400896EXPORT_SYMBOL_GPL(nfs_show_stats);
David Howellsf7b422b2006-06-09 09:34:33 -0400897
898/*
899 * Begin unmount by attempting to remove all automounted mountpoints we added
David Howells54ceac42006-08-22 20:06:13 -0400900 * in response to xdev traversals and referrals
David Howellsf7b422b2006-06-09 09:34:33 -0400901 */
Bryan Schumakerfbdefd62012-07-16 16:39:20 -0400902void nfs_umount_begin(struct super_block *sb)
David Howellsf7b422b2006-06-09 09:34:33 -0400903{
Alessio Igor Bogani67e55202009-04-24 09:06:53 +0200904 struct nfs_server *server;
Trond Myklebustfc6ae3c2007-06-05 19:13:47 -0400905 struct rpc_clnt *rpc;
906
Alessio Igor Bogani67e55202009-04-24 09:06:53 +0200907 server = NFS_SB(sb);
Trond Myklebustfc6ae3c2007-06-05 19:13:47 -0400908 /* -EIO all pending I/O */
909 rpc = server->client_acl;
910 if (!IS_ERR(rpc))
911 rpc_killall_tasks(rpc);
912 rpc = server->client;
913 if (!IS_ERR(rpc))
914 rpc_killall_tasks(rpc);
David Howellsf7b422b2006-06-09 09:34:33 -0400915}
Bryan Schumaker89d77c82012-07-30 16:05:25 -0400916EXPORT_SYMBOL_GPL(nfs_umount_begin);
David Howellsf7b422b2006-06-09 09:34:33 -0400917
Bryan Schumakerdb833352012-05-10 15:07:38 -0400918static struct nfs_parsed_mount_data *nfs_alloc_parsed_mount_data(void)
Chuck Lever9423a082009-09-23 14:36:38 -0400919{
920 struct nfs_parsed_mount_data *data;
921
922 data = kzalloc(sizeof(*data), GFP_KERNEL);
923 if (data) {
Chuck Lever9423a082009-09-23 14:36:38 -0400924 data->acregmin = NFS_DEF_ACREGMIN;
925 data->acregmax = NFS_DEF_ACREGMAX;
926 data->acdirmin = NFS_DEF_ACDIRMIN;
927 data->acdirmax = NFS_DEF_ACDIRMAX;
Trond Myklebustc5811db2009-10-06 15:40:15 -0400928 data->mount_server.port = NFS_UNSPEC_PORT;
Chuck Lever9423a082009-09-23 14:36:38 -0400929 data->nfs_server.port = NFS_UNSPEC_PORT;
Trond Myklebustc5811db2009-10-06 15:40:15 -0400930 data->nfs_server.protocol = XPRT_TRANSPORT_TCP;
Weston Andros Adamsona3f73c22013-10-18 15:15:16 -0400931 data->selected_flavor = RPC_AUTH_MAXFLAVOR;
Chuck Lever9423a082009-09-23 14:36:38 -0400932 data->minorversion = 0;
Bryan Schumakerb72e4f42012-05-10 15:07:40 -0400933 data->need_mount = true;
Trond Myklebust9937347a2012-02-19 08:44:07 +0100934 data->net = current->nsproxy->net_ns;
Jeff Layton8a0d5512011-12-20 06:57:45 -0500935 security_init_mnt_opts(&data->lsm_opts);
Chuck Lever9423a082009-09-23 14:36:38 -0400936 }
937 return data;
938}
939
Jeff Layton8a0d5512011-12-20 06:57:45 -0500940static void nfs_free_parsed_mount_data(struct nfs_parsed_mount_data *data)
941{
942 if (data) {
943 kfree(data->client_address);
944 kfree(data->mount_server.hostname);
945 kfree(data->nfs_server.export_path);
946 kfree(data->nfs_server.hostname);
947 kfree(data->fscache_uniq);
948 security_free_mnt_opts(&data->lsm_opts);
949 kfree(data);
950 }
951}
952
David Howellsf7b422b2006-06-09 09:34:33 -0400953/*
Chuck Levercdcd7f92007-12-10 14:57:45 -0500954 * Sanity-check a server address provided by the mount command.
955 *
956 * Address family must be initialized, and address must not be
957 * the ANY address for that family.
Chuck Leverfc50d582007-07-01 12:12:46 -0400958 */
959static int nfs_verify_server_address(struct sockaddr *addr)
960{
961 switch (addr->sa_family) {
962 case AF_INET: {
Chuck Levercdcd7f92007-12-10 14:57:45 -0500963 struct sockaddr_in *sa = (struct sockaddr_in *)addr;
Al Viroe6f1ceb2008-03-17 22:44:53 -0700964 return sa->sin_addr.s_addr != htonl(INADDR_ANY);
Chuck Levercdcd7f92007-12-10 14:57:45 -0500965 }
966 case AF_INET6: {
967 struct in6_addr *sa = &((struct sockaddr_in6 *)addr)->sin6_addr;
968 return !ipv6_addr_any(sa);
Chuck Leverfc50d582007-07-01 12:12:46 -0400969 }
970 }
971
Chuck Lever53a0b9c2009-08-09 15:09:36 -0400972 dfprintk(MOUNT, "NFS: Invalid IP address specified\n");
Chuck Leverfc50d582007-07-01 12:12:46 -0400973 return 0;
974}
975
Chuck Lever9412b922007-12-10 14:59:21 -0500976/*
Chuck Lever4cfd74f2009-09-08 19:49:47 -0400977 * Select between a default port value and a user-specified port value.
978 * If a zero value is set, then autobind will be used.
979 */
Trond Myklebustf5855fe2009-10-06 15:40:37 -0400980static void nfs_set_port(struct sockaddr *sap, int *port,
Chuck Lever4cfd74f2009-09-08 19:49:47 -0400981 const unsigned short default_port)
982{
Trond Myklebustf5855fe2009-10-06 15:40:37 -0400983 if (*port == NFS_UNSPEC_PORT)
984 *port = default_port;
Chuck Lever4cfd74f2009-09-08 19:49:47 -0400985
Trond Myklebustf5855fe2009-10-06 15:40:37 -0400986 rpc_set_port(sap, *port);
Chuck Lever4cfd74f2009-09-08 19:49:47 -0400987}
988
989/*
Trond Myklebust259875e2008-07-02 14:43:47 -0400990 * Sanity check the NFS transport protocol.
991 *
992 */
993static void nfs_validate_transport_protocol(struct nfs_parsed_mount_data *mnt)
994{
995 switch (mnt->nfs_server.protocol) {
996 case XPRT_TRANSPORT_UDP:
997 case XPRT_TRANSPORT_TCP:
998 case XPRT_TRANSPORT_RDMA:
999 break;
1000 default:
1001 mnt->nfs_server.protocol = XPRT_TRANSPORT_TCP;
1002 }
1003}
1004
1005/*
1006 * For text based NFSv2/v3 mounts, the mount protocol transport default
1007 * settings should depend upon the specified NFS transport.
1008 */
1009static void nfs_set_mount_transport_protocol(struct nfs_parsed_mount_data *mnt)
1010{
1011 nfs_validate_transport_protocol(mnt);
1012
1013 if (mnt->mount_server.protocol == XPRT_TRANSPORT_UDP ||
1014 mnt->mount_server.protocol == XPRT_TRANSPORT_TCP)
1015 return;
1016 switch (mnt->nfs_server.protocol) {
1017 case XPRT_TRANSPORT_UDP:
1018 mnt->mount_server.protocol = XPRT_TRANSPORT_UDP;
1019 break;
1020 case XPRT_TRANSPORT_TCP:
1021 case XPRT_TRANSPORT_RDMA:
1022 mnt->mount_server.protocol = XPRT_TRANSPORT_TCP;
1023 }
1024}
1025
1026/*
Weston Andros Adamson4d4b69d2013-10-18 15:15:19 -04001027 * Add 'flavor' to 'auth_info' if not already present.
1028 * Returns true if 'flavor' ends up in the list, false otherwise
1029 */
1030static bool nfs_auth_info_add(struct nfs_auth_info *auth_info,
1031 rpc_authflavor_t flavor)
1032{
1033 unsigned int i;
Fabian Frederick00216022014-06-30 19:49:39 +02001034 unsigned int max_flavor_len = ARRAY_SIZE(auth_info->flavors);
Weston Andros Adamson4d4b69d2013-10-18 15:15:19 -04001035
1036 /* make sure this flavor isn't already in the list */
1037 for (i = 0; i < auth_info->flavor_len; i++) {
1038 if (flavor == auth_info->flavors[i])
1039 return true;
1040 }
1041
1042 if (auth_info->flavor_len + 1 >= max_flavor_len) {
1043 dfprintk(MOUNT, "NFS: too many sec= flavors\n");
1044 return false;
1045 }
1046
1047 auth_info->flavors[auth_info->flavor_len++] = flavor;
1048 return true;
1049}
1050
1051/*
1052 * Return true if 'match' is in auth_info or auth_info is empty.
1053 * Return false otherwise.
1054 */
1055bool nfs_auth_info_match(const struct nfs_auth_info *auth_info,
1056 rpc_authflavor_t match)
1057{
1058 int i;
1059
1060 if (!auth_info->flavor_len)
1061 return true;
1062
1063 for (i = 0; i < auth_info->flavor_len; i++) {
1064 if (auth_info->flavors[i] == match)
1065 return true;
1066 }
1067 return false;
1068}
1069EXPORT_SYMBOL_GPL(nfs_auth_info_match);
1070
1071/*
Chuck Lever01060c82008-06-24 16:33:38 -04001072 * Parse the value of the 'sec=' option.
Chuck Lever01060c82008-06-24 16:33:38 -04001073 */
1074static int nfs_parse_security_flavors(char *value,
1075 struct nfs_parsed_mount_data *mnt)
1076{
1077 substring_t args[MAX_OPT_ARGS];
Trond Myklebust19e7b8d2013-09-07 14:09:52 -04001078 rpc_authflavor_t pseudoflavor;
Weston Andros Adamson4d4b69d2013-10-18 15:15:19 -04001079 char *p;
Chuck Lever01060c82008-06-24 16:33:38 -04001080
1081 dfprintk(MOUNT, "NFS: parsing sec=%s option\n", value);
1082
Weston Andros Adamson4d4b69d2013-10-18 15:15:19 -04001083 while ((p = strsep(&value, ":")) != NULL) {
1084 switch (match_token(p, nfs_secflavor_tokens, args)) {
1085 case Opt_sec_none:
1086 pseudoflavor = RPC_AUTH_NULL;
1087 break;
1088 case Opt_sec_sys:
1089 pseudoflavor = RPC_AUTH_UNIX;
1090 break;
1091 case Opt_sec_krb5:
1092 pseudoflavor = RPC_AUTH_GSS_KRB5;
1093 break;
1094 case Opt_sec_krb5i:
1095 pseudoflavor = RPC_AUTH_GSS_KRB5I;
1096 break;
1097 case Opt_sec_krb5p:
1098 pseudoflavor = RPC_AUTH_GSS_KRB5P;
1099 break;
1100 case Opt_sec_lkey:
1101 pseudoflavor = RPC_AUTH_GSS_LKEY;
1102 break;
1103 case Opt_sec_lkeyi:
1104 pseudoflavor = RPC_AUTH_GSS_LKEYI;
1105 break;
1106 case Opt_sec_lkeyp:
1107 pseudoflavor = RPC_AUTH_GSS_LKEYP;
1108 break;
1109 case Opt_sec_spkm:
1110 pseudoflavor = RPC_AUTH_GSS_SPKM;
1111 break;
1112 case Opt_sec_spkmi:
1113 pseudoflavor = RPC_AUTH_GSS_SPKMI;
1114 break;
1115 case Opt_sec_spkmp:
1116 pseudoflavor = RPC_AUTH_GSS_SPKMP;
1117 break;
1118 default:
1119 dfprintk(MOUNT,
1120 "NFS: sec= option '%s' not recognized\n", p);
1121 return 0;
1122 }
1123
1124 if (!nfs_auth_info_add(&mnt->auth_info, pseudoflavor))
1125 return 0;
Chuck Lever01060c82008-06-24 16:33:38 -04001126 }
1127
1128 return 1;
1129}
1130
Trond Myklebust0d71b052012-03-02 13:59:49 -05001131static int nfs_parse_version_string(char *string,
1132 struct nfs_parsed_mount_data *mnt,
1133 substring_t *args)
1134{
1135 mnt->flags &= ~NFS_MOUNT_VER3;
1136 switch (match_token(string, nfs_vers_tokens, args)) {
1137 case Opt_vers_2:
1138 mnt->version = 2;
1139 break;
1140 case Opt_vers_3:
1141 mnt->flags |= NFS_MOUNT_VER3;
1142 mnt->version = 3;
1143 break;
1144 case Opt_vers_4:
1145 /* Backward compatibility option. In future,
1146 * the mount program should always supply
1147 * a NFSv4 minor version number.
1148 */
1149 mnt->version = 4;
1150 break;
1151 case Opt_vers_4_0:
1152 mnt->version = 4;
1153 mnt->minorversion = 0;
1154 break;
1155 case Opt_vers_4_1:
1156 mnt->version = 4;
1157 mnt->minorversion = 1;
1158 break;
Steve Dickson42c2c422013-05-22 12:50:38 -04001159 case Opt_vers_4_2:
1160 mnt->version = 4;
1161 mnt->minorversion = 2;
1162 break;
Trond Myklebust0d71b052012-03-02 13:59:49 -05001163 default:
1164 return 0;
1165 }
1166 return 1;
1167}
1168
Rob Landleyc5cb09b2011-03-09 16:02:37 -06001169static int nfs_get_option_str(substring_t args[], char **option)
1170{
1171 kfree(*option);
1172 *option = match_strdup(args);
Xi Wange25fbe32013-01-04 03:22:57 -05001173 return !*option;
Rob Landleyc5cb09b2011-03-09 16:02:37 -06001174}
1175
1176static int nfs_get_option_ul(substring_t args[], unsigned long *option)
1177{
1178 int rc;
1179 char *string;
1180
1181 string = match_strdup(args);
1182 if (string == NULL)
1183 return -ENOMEM;
Daniel Walter7297cb62012-09-26 21:51:46 +02001184 rc = kstrtoul(string, 10, option);
Rob Landleyc5cb09b2011-03-09 16:02:37 -06001185 kfree(string);
1186
1187 return rc;
1188}
1189
Chuck Lever01060c82008-06-24 16:33:38 -04001190/*
Chuck Leverbf0fd762007-07-01 12:13:44 -04001191 * Error-check and convert a string of mount options from user space into
Chuck Leverf45663c2008-06-24 19:28:02 -04001192 * a data structure. The whole mount string is processed; bad options are
1193 * skipped as they are encountered. If there were no errors, return 1;
1194 * otherwise return 0 (zero).
Chuck Leverbf0fd762007-07-01 12:13:44 -04001195 */
1196static int nfs_parse_mount_options(char *raw,
1197 struct nfs_parsed_mount_data *mnt)
1198{
Eric Parisf9c3a382008-03-05 14:20:18 -05001199 char *p, *string, *secdata;
Chuck Leverd23c45f2009-06-17 18:02:13 -07001200 int rc, sloppy = 0, invalid_option = 0;
Jeff Laytonee671b02009-12-03 15:58:56 -05001201 unsigned short protofamily = AF_UNSPEC;
1202 unsigned short mountfamily = AF_UNSPEC;
Chuck Leverbf0fd762007-07-01 12:13:44 -04001203
1204 if (!raw) {
1205 dfprintk(MOUNT, "NFS: mount options string was NULL.\n");
1206 return 1;
1207 }
1208 dfprintk(MOUNT, "NFS: nfs mount opts='%s'\n", raw);
1209
Eric Parisf9c3a382008-03-05 14:20:18 -05001210 secdata = alloc_secdata();
1211 if (!secdata)
1212 goto out_nomem;
1213
1214 rc = security_sb_copy_data(raw, secdata);
1215 if (rc)
1216 goto out_security_failure;
1217
1218 rc = security_sb_parse_opts_str(secdata, &mnt->lsm_opts);
1219 if (rc)
1220 goto out_security_failure;
1221
1222 free_secdata(secdata);
1223
Chuck Leverbf0fd762007-07-01 12:13:44 -04001224 while ((p = strsep(&raw, ",")) != NULL) {
1225 substring_t args[MAX_OPT_ARGS];
Chuck Levera5a16ba2009-06-17 18:02:14 -07001226 unsigned long option;
1227 int token;
Chuck Leverbf0fd762007-07-01 12:13:44 -04001228
1229 if (!*p)
1230 continue;
1231
1232 dfprintk(MOUNT, "NFS: parsing nfs mount option '%s'\n", p);
1233
1234 token = match_token(p, nfs_mount_option_tokens, args);
1235 switch (token) {
Chuck Leverf45663c2008-06-24 19:28:02 -04001236
1237 /*
1238 * boolean options: foo/nofoo
1239 */
Chuck Leverbf0fd762007-07-01 12:13:44 -04001240 case Opt_soft:
1241 mnt->flags |= NFS_MOUNT_SOFT;
1242 break;
1243 case Opt_hard:
1244 mnt->flags &= ~NFS_MOUNT_SOFT;
1245 break;
Chuck Leverbf0fd762007-07-01 12:13:44 -04001246 case Opt_posix:
1247 mnt->flags |= NFS_MOUNT_POSIX;
1248 break;
1249 case Opt_noposix:
1250 mnt->flags &= ~NFS_MOUNT_POSIX;
1251 break;
1252 case Opt_cto:
1253 mnt->flags &= ~NFS_MOUNT_NOCTO;
1254 break;
1255 case Opt_nocto:
1256 mnt->flags |= NFS_MOUNT_NOCTO;
1257 break;
1258 case Opt_ac:
1259 mnt->flags &= ~NFS_MOUNT_NOAC;
1260 break;
1261 case Opt_noac:
1262 mnt->flags |= NFS_MOUNT_NOAC;
1263 break;
1264 case Opt_lock:
1265 mnt->flags &= ~NFS_MOUNT_NONLM;
Suresh Jayaraman5eebde22010-09-23 08:55:58 -04001266 mnt->flags &= ~(NFS_MOUNT_LOCAL_FLOCK |
1267 NFS_MOUNT_LOCAL_FCNTL);
Chuck Leverbf0fd762007-07-01 12:13:44 -04001268 break;
1269 case Opt_nolock:
1270 mnt->flags |= NFS_MOUNT_NONLM;
Suresh Jayaraman5eebde22010-09-23 08:55:58 -04001271 mnt->flags |= (NFS_MOUNT_LOCAL_FLOCK |
1272 NFS_MOUNT_LOCAL_FCNTL);
Chuck Leverbf0fd762007-07-01 12:13:44 -04001273 break;
Chuck Leverbf0fd762007-07-01 12:13:44 -04001274 case Opt_udp:
1275 mnt->flags &= ~NFS_MOUNT_TCP;
\"Talpey, Thomas\0896a722007-09-10 13:48:23 -04001276 mnt->nfs_server.protocol = XPRT_TRANSPORT_UDP;
Chuck Leverbf0fd762007-07-01 12:13:44 -04001277 break;
1278 case Opt_tcp:
1279 mnt->flags |= NFS_MOUNT_TCP;
\"Talpey, Thomas\0896a722007-09-10 13:48:23 -04001280 mnt->nfs_server.protocol = XPRT_TRANSPORT_TCP;
Chuck Leverbf0fd762007-07-01 12:13:44 -04001281 break;
\"Talpey, Thomas\2cf7ff72007-09-10 13:49:41 -04001282 case Opt_rdma:
1283 mnt->flags |= NFS_MOUNT_TCP; /* for side protocols */
1284 mnt->nfs_server.protocol = XPRT_TRANSPORT_RDMA;
Tom Talpeya67d18f2009-03-11 14:37:56 -04001285 xprt_load_transport(p);
\"Talpey, Thomas\2cf7ff72007-09-10 13:49:41 -04001286 break;
Chuck Leverbf0fd762007-07-01 12:13:44 -04001287 case Opt_acl:
1288 mnt->flags &= ~NFS_MOUNT_NOACL;
1289 break;
1290 case Opt_noacl:
1291 mnt->flags |= NFS_MOUNT_NOACL;
1292 break;
1293 case Opt_rdirplus:
1294 mnt->flags &= ~NFS_MOUNT_NORDIRPLUS;
1295 break;
1296 case Opt_nordirplus:
1297 mnt->flags |= NFS_MOUNT_NORDIRPLUS;
1298 break;
Trond Myklebust75180df2007-05-16 16:53:28 -04001299 case Opt_sharecache:
1300 mnt->flags &= ~NFS_MOUNT_UNSHARED;
1301 break;
1302 case Opt_nosharecache:
1303 mnt->flags |= NFS_MOUNT_UNSHARED;
1304 break;
Chuck Leverd7403512008-12-23 15:21:37 -05001305 case Opt_resvport:
1306 mnt->flags &= ~NFS_MOUNT_NORESVPORT;
1307 break;
1308 case Opt_noresvport:
1309 mnt->flags |= NFS_MOUNT_NORESVPORT;
1310 break;
David Howellsb797cac2009-04-03 16:42:48 +01001311 case Opt_fscache:
1312 mnt->options |= NFS_OPTION_FSCACHE;
1313 kfree(mnt->fscache_uniq);
1314 mnt->fscache_uniq = NULL;
1315 break;
1316 case Opt_nofscache:
1317 mnt->options &= ~NFS_OPTION_FSCACHE;
1318 kfree(mnt->fscache_uniq);
1319 mnt->fscache_uniq = NULL;
1320 break;
Chuck Lever89652612012-09-14 17:24:11 -04001321 case Opt_migration:
1322 mnt->options |= NFS_OPTION_MIGRATION;
1323 break;
1324 case Opt_nomigration:
1325 mnt->options &= NFS_OPTION_MIGRATION;
1326 break;
Chuck Leverbf0fd762007-07-01 12:13:44 -04001327
Chuck Leverf45663c2008-06-24 19:28:02 -04001328 /*
1329 * options that take numeric values
1330 */
Chuck Leverbf0fd762007-07-01 12:13:44 -04001331 case Opt_port:
Rob Landleyc5cb09b2011-03-09 16:02:37 -06001332 if (nfs_get_option_ul(args, &option) ||
1333 option > USHRT_MAX)
Chuck Leverd23c45f2009-06-17 18:02:13 -07001334 goto out_invalid_value;
1335 mnt->nfs_server.port = option;
Chuck Leverbf0fd762007-07-01 12:13:44 -04001336 break;
1337 case Opt_rsize:
Rob Landleyc5cb09b2011-03-09 16:02:37 -06001338 if (nfs_get_option_ul(args, &option))
Chuck Leverd23c45f2009-06-17 18:02:13 -07001339 goto out_invalid_value;
1340 mnt->rsize = option;
Chuck Leverbf0fd762007-07-01 12:13:44 -04001341 break;
1342 case Opt_wsize:
Rob Landleyc5cb09b2011-03-09 16:02:37 -06001343 if (nfs_get_option_ul(args, &option))
Chuck Leverd23c45f2009-06-17 18:02:13 -07001344 goto out_invalid_value;
1345 mnt->wsize = option;
Chuck Leverbf0fd762007-07-01 12:13:44 -04001346 break;
1347 case Opt_bsize:
Rob Landleyc5cb09b2011-03-09 16:02:37 -06001348 if (nfs_get_option_ul(args, &option))
Chuck Leverd23c45f2009-06-17 18:02:13 -07001349 goto out_invalid_value;
1350 mnt->bsize = option;
Chuck Leverbf0fd762007-07-01 12:13:44 -04001351 break;
1352 case Opt_timeo:
Rob Landleyc5cb09b2011-03-09 16:02:37 -06001353 if (nfs_get_option_ul(args, &option) || option == 0)
Chuck Leverd23c45f2009-06-17 18:02:13 -07001354 goto out_invalid_value;
1355 mnt->timeo = option;
Chuck Leverbf0fd762007-07-01 12:13:44 -04001356 break;
1357 case Opt_retrans:
Rob Landleyc5cb09b2011-03-09 16:02:37 -06001358 if (nfs_get_option_ul(args, &option) || option == 0)
Chuck Leverd23c45f2009-06-17 18:02:13 -07001359 goto out_invalid_value;
1360 mnt->retrans = option;
Chuck Leverbf0fd762007-07-01 12:13:44 -04001361 break;
1362 case Opt_acregmin:
Rob Landleyc5cb09b2011-03-09 16:02:37 -06001363 if (nfs_get_option_ul(args, &option))
Chuck Leverd23c45f2009-06-17 18:02:13 -07001364 goto out_invalid_value;
1365 mnt->acregmin = option;
Chuck Leverbf0fd762007-07-01 12:13:44 -04001366 break;
1367 case Opt_acregmax:
Rob Landleyc5cb09b2011-03-09 16:02:37 -06001368 if (nfs_get_option_ul(args, &option))
Chuck Leverd23c45f2009-06-17 18:02:13 -07001369 goto out_invalid_value;
1370 mnt->acregmax = option;
Chuck Leverbf0fd762007-07-01 12:13:44 -04001371 break;
1372 case Opt_acdirmin:
Rob Landleyc5cb09b2011-03-09 16:02:37 -06001373 if (nfs_get_option_ul(args, &option))
Chuck Leverd23c45f2009-06-17 18:02:13 -07001374 goto out_invalid_value;
1375 mnt->acdirmin = option;
Chuck Leverbf0fd762007-07-01 12:13:44 -04001376 break;
1377 case Opt_acdirmax:
Rob Landleyc5cb09b2011-03-09 16:02:37 -06001378 if (nfs_get_option_ul(args, &option))
Chuck Leverd23c45f2009-06-17 18:02:13 -07001379 goto out_invalid_value;
1380 mnt->acdirmax = option;
Chuck Leverbf0fd762007-07-01 12:13:44 -04001381 break;
1382 case Opt_actimeo:
Rob Landleyc5cb09b2011-03-09 16:02:37 -06001383 if (nfs_get_option_ul(args, &option))
Chuck Leverd23c45f2009-06-17 18:02:13 -07001384 goto out_invalid_value;
1385 mnt->acregmin = mnt->acregmax =
1386 mnt->acdirmin = mnt->acdirmax = option;
Chuck Leverbf0fd762007-07-01 12:13:44 -04001387 break;
1388 case Opt_namelen:
Rob Landleyc5cb09b2011-03-09 16:02:37 -06001389 if (nfs_get_option_ul(args, &option))
Chuck Leverd23c45f2009-06-17 18:02:13 -07001390 goto out_invalid_value;
1391 mnt->namlen = option;
Chuck Leverbf0fd762007-07-01 12:13:44 -04001392 break;
1393 case Opt_mountport:
Rob Landleyc5cb09b2011-03-09 16:02:37 -06001394 if (nfs_get_option_ul(args, &option) ||
1395 option > USHRT_MAX)
Chuck Leverd23c45f2009-06-17 18:02:13 -07001396 goto out_invalid_value;
1397 mnt->mount_server.port = option;
Chuck Leverbf0fd762007-07-01 12:13:44 -04001398 break;
Chuck Leverbf0fd762007-07-01 12:13:44 -04001399 case Opt_mountvers:
Rob Landleyc5cb09b2011-03-09 16:02:37 -06001400 if (nfs_get_option_ul(args, &option) ||
Chuck Leverf45663c2008-06-24 19:28:02 -04001401 option < NFS_MNT_VERSION ||
Chuck Leverd23c45f2009-06-17 18:02:13 -07001402 option > NFS_MNT3_VERSION)
1403 goto out_invalid_value;
1404 mnt->mount_server.version = option;
Chuck Leverbf0fd762007-07-01 12:13:44 -04001405 break;
Mike Sager3fd5be92009-04-01 09:21:48 -04001406 case Opt_minorversion:
Rob Landleyc5cb09b2011-03-09 16:02:37 -06001407 if (nfs_get_option_ul(args, &option))
Chuck Leverf3f4f4e2009-08-09 15:09:29 -04001408 goto out_invalid_value;
1409 if (option > NFS4_MAX_MINOR_VERSION)
1410 goto out_invalid_value;
1411 mnt->minorversion = option;
Mike Sager3fd5be92009-04-01 09:21:48 -04001412 break;
Chuck Leverbf0fd762007-07-01 12:13:44 -04001413
Chuck Leverf45663c2008-06-24 19:28:02 -04001414 /*
1415 * options that take text values
1416 */
Trond Myklebust0d71b052012-03-02 13:59:49 -05001417 case Opt_nfsvers:
1418 string = match_strdup(args);
1419 if (string == NULL)
1420 goto out_nomem;
1421 rc = nfs_parse_version_string(string, mnt, args);
1422 kfree(string);
1423 if (!rc)
1424 goto out_invalid_value;
1425 break;
Chuck Leverbf0fd762007-07-01 12:13:44 -04001426 case Opt_sec:
1427 string = match_strdup(args);
1428 if (string == NULL)
1429 goto out_nomem;
Chuck Lever01060c82008-06-24 16:33:38 -04001430 rc = nfs_parse_security_flavors(string, mnt);
Chuck Leverbf0fd762007-07-01 12:13:44 -04001431 kfree(string);
Chuck Leverf45663c2008-06-24 19:28:02 -04001432 if (!rc) {
Chuck Leverf45663c2008-06-24 19:28:02 -04001433 dfprintk(MOUNT, "NFS: unrecognized "
1434 "security flavor\n");
Chuck Leverd23c45f2009-06-17 18:02:13 -07001435 return 0;
Chuck Leverf45663c2008-06-24 19:28:02 -04001436 }
Chuck Leverbf0fd762007-07-01 12:13:44 -04001437 break;
1438 case Opt_proto:
1439 string = match_strdup(args);
1440 if (string == NULL)
1441 goto out_nomem;
1442 token = match_token(string,
1443 nfs_xprt_protocol_tokens, args);
Chuck Leverbf0fd762007-07-01 12:13:44 -04001444
Jeff Laytonee671b02009-12-03 15:58:56 -05001445 protofamily = AF_INET;
Chuck Leverbf0fd762007-07-01 12:13:44 -04001446 switch (token) {
Jeff Laytonee671b02009-12-03 15:58:56 -05001447 case Opt_xprt_udp6:
1448 protofamily = AF_INET6;
Chuck Leverfdb66ff2007-08-29 17:58:57 -04001449 case Opt_xprt_udp:
Chuck Leverbf0fd762007-07-01 12:13:44 -04001450 mnt->flags &= ~NFS_MOUNT_TCP;
\"Talpey, Thomas\0896a722007-09-10 13:48:23 -04001451 mnt->nfs_server.protocol = XPRT_TRANSPORT_UDP;
Chuck Leverbf0fd762007-07-01 12:13:44 -04001452 break;
Jeff Laytonee671b02009-12-03 15:58:56 -05001453 case Opt_xprt_tcp6:
1454 protofamily = AF_INET6;
Chuck Leverfdb66ff2007-08-29 17:58:57 -04001455 case Opt_xprt_tcp:
Chuck Leverbf0fd762007-07-01 12:13:44 -04001456 mnt->flags |= NFS_MOUNT_TCP;
\"Talpey, Thomas\0896a722007-09-10 13:48:23 -04001457 mnt->nfs_server.protocol = XPRT_TRANSPORT_TCP;
Chuck Leverbf0fd762007-07-01 12:13:44 -04001458 break;
\"Talpey, Thomas\2cf7ff72007-09-10 13:49:41 -04001459 case Opt_xprt_rdma:
1460 /* vector side protocols to TCP */
1461 mnt->flags |= NFS_MOUNT_TCP;
1462 mnt->nfs_server.protocol = XPRT_TRANSPORT_RDMA;
Tom Talpeya67d18f2009-03-11 14:37:56 -04001463 xprt_load_transport(string);
\"Talpey, Thomas\2cf7ff72007-09-10 13:49:41 -04001464 break;
Chuck Leverbf0fd762007-07-01 12:13:44 -04001465 default:
Chuck Leverf45663c2008-06-24 19:28:02 -04001466 dfprintk(MOUNT, "NFS: unrecognized "
1467 "transport protocol\n");
Yinghai Lu4223a4a2009-10-20 14:13:46 +09001468 kfree(string);
Chuck Leverd23c45f2009-06-17 18:02:13 -07001469 return 0;
Chuck Leverbf0fd762007-07-01 12:13:44 -04001470 }
Rob Landleyc5cb09b2011-03-09 16:02:37 -06001471 kfree(string);
Chuck Leverbf0fd762007-07-01 12:13:44 -04001472 break;
1473 case Opt_mountproto:
1474 string = match_strdup(args);
1475 if (string == NULL)
1476 goto out_nomem;
1477 token = match_token(string,
1478 nfs_xprt_protocol_tokens, args);
Trond Myklebustd508afb2009-04-06 16:41:35 -07001479 kfree(string);
Chuck Leverbf0fd762007-07-01 12:13:44 -04001480
Jeff Laytonee671b02009-12-03 15:58:56 -05001481 mountfamily = AF_INET;
Chuck Leverbf0fd762007-07-01 12:13:44 -04001482 switch (token) {
Jeff Laytonee671b02009-12-03 15:58:56 -05001483 case Opt_xprt_udp6:
1484 mountfamily = AF_INET6;
Chuck Leverfdb66ff2007-08-29 17:58:57 -04001485 case Opt_xprt_udp:
\"Talpey, Thomas\0896a722007-09-10 13:48:23 -04001486 mnt->mount_server.protocol = XPRT_TRANSPORT_UDP;
Chuck Leverbf0fd762007-07-01 12:13:44 -04001487 break;
Jeff Laytonee671b02009-12-03 15:58:56 -05001488 case Opt_xprt_tcp6:
1489 mountfamily = AF_INET6;
Chuck Leverfdb66ff2007-08-29 17:58:57 -04001490 case Opt_xprt_tcp:
\"Talpey, Thomas\0896a722007-09-10 13:48:23 -04001491 mnt->mount_server.protocol = XPRT_TRANSPORT_TCP;
Chuck Leverbf0fd762007-07-01 12:13:44 -04001492 break;
\"Talpey, Thomas\2cf7ff72007-09-10 13:49:41 -04001493 case Opt_xprt_rdma: /* not used for side protocols */
Chuck Leverbf0fd762007-07-01 12:13:44 -04001494 default:
Chuck Leverf45663c2008-06-24 19:28:02 -04001495 dfprintk(MOUNT, "NFS: unrecognized "
1496 "transport protocol\n");
Chuck Leverd23c45f2009-06-17 18:02:13 -07001497 return 0;
Chuck Leverbf0fd762007-07-01 12:13:44 -04001498 }
1499 break;
1500 case Opt_addr:
1501 string = match_strdup(args);
1502 if (string == NULL)
1503 goto out_nomem;
Chuck Lever53a0b9c2009-08-09 15:09:36 -04001504 mnt->nfs_server.addrlen =
Stanislav Kinsburskyb48e1272012-01-26 15:11:57 +04001505 rpc_pton(mnt->net, string, strlen(string),
Chuck Lever53a0b9c2009-08-09 15:09:36 -04001506 (struct sockaddr *)
1507 &mnt->nfs_server.address,
1508 sizeof(mnt->nfs_server.address));
Chuck Leverbf0fd762007-07-01 12:13:44 -04001509 kfree(string);
Chuck Lever53a0b9c2009-08-09 15:09:36 -04001510 if (mnt->nfs_server.addrlen == 0)
1511 goto out_invalid_address;
Chuck Leverbf0fd762007-07-01 12:13:44 -04001512 break;
1513 case Opt_clientaddr:
Rob Landleyc5cb09b2011-03-09 16:02:37 -06001514 if (nfs_get_option_str(args, &mnt->client_address))
Chuck Leverbf0fd762007-07-01 12:13:44 -04001515 goto out_nomem;
Chuck Leverbf0fd762007-07-01 12:13:44 -04001516 break;
Chuck Lever33832032007-12-10 14:59:13 -05001517 case Opt_mounthost:
Rob Landleyc5cb09b2011-03-09 16:02:37 -06001518 if (nfs_get_option_str(args,
1519 &mnt->mount_server.hostname))
Chuck Lever33832032007-12-10 14:59:13 -05001520 goto out_nomem;
Chuck Lever33832032007-12-10 14:59:13 -05001521 break;
Chuck Lever0ac83772007-09-11 18:01:04 -04001522 case Opt_mountaddr:
Chuck Leverbf0fd762007-07-01 12:13:44 -04001523 string = match_strdup(args);
1524 if (string == NULL)
1525 goto out_nomem;
Chuck Lever53a0b9c2009-08-09 15:09:36 -04001526 mnt->mount_server.addrlen =
Stanislav Kinsburskyb48e1272012-01-26 15:11:57 +04001527 rpc_pton(mnt->net, string, strlen(string),
Chuck Lever53a0b9c2009-08-09 15:09:36 -04001528 (struct sockaddr *)
1529 &mnt->mount_server.address,
1530 sizeof(mnt->mount_server.address));
Chuck Leverbf0fd762007-07-01 12:13:44 -04001531 kfree(string);
Chuck Lever53a0b9c2009-08-09 15:09:36 -04001532 if (mnt->mount_server.addrlen == 0)
1533 goto out_invalid_address;
Chuck Leverbf0fd762007-07-01 12:13:44 -04001534 break;
Trond Myklebust7973c1f12008-07-15 17:58:14 -04001535 case Opt_lookupcache:
1536 string = match_strdup(args);
1537 if (string == NULL)
1538 goto out_nomem;
1539 token = match_token(string,
1540 nfs_lookupcache_tokens, args);
1541 kfree(string);
1542 switch (token) {
1543 case Opt_lookupcache_all:
1544 mnt->flags &= ~(NFS_MOUNT_LOOKUP_CACHE_NONEG|NFS_MOUNT_LOOKUP_CACHE_NONE);
1545 break;
1546 case Opt_lookupcache_positive:
1547 mnt->flags &= ~NFS_MOUNT_LOOKUP_CACHE_NONE;
1548 mnt->flags |= NFS_MOUNT_LOOKUP_CACHE_NONEG;
1549 break;
1550 case Opt_lookupcache_none:
1551 mnt->flags |= NFS_MOUNT_LOOKUP_CACHE_NONEG|NFS_MOUNT_LOOKUP_CACHE_NONE;
1552 break;
1553 default:
Trond Myklebust7973c1f12008-07-15 17:58:14 -04001554 dfprintk(MOUNT, "NFS: invalid "
1555 "lookupcache argument\n");
Chuck Leverd23c45f2009-06-17 18:02:13 -07001556 return 0;
Trond Myklebust7973c1f12008-07-15 17:58:14 -04001557 };
1558 break;
Chuck Levera6d5ff62010-05-07 13:33:58 -04001559 case Opt_fscache_uniq:
Rob Landleyc5cb09b2011-03-09 16:02:37 -06001560 if (nfs_get_option_str(args, &mnt->fscache_uniq))
Chuck Levera6d5ff62010-05-07 13:33:58 -04001561 goto out_nomem;
Chuck Levera6d5ff62010-05-07 13:33:58 -04001562 mnt->options |= NFS_OPTION_FSCACHE;
1563 break;
Suresh Jayaraman5eebde22010-09-23 08:55:58 -04001564 case Opt_local_lock:
1565 string = match_strdup(args);
1566 if (string == NULL)
1567 goto out_nomem;
1568 token = match_token(string, nfs_local_lock_tokens,
1569 args);
1570 kfree(string);
1571 switch (token) {
1572 case Opt_local_lock_all:
1573 mnt->flags |= (NFS_MOUNT_LOCAL_FLOCK |
1574 NFS_MOUNT_LOCAL_FCNTL);
1575 break;
1576 case Opt_local_lock_flock:
1577 mnt->flags |= NFS_MOUNT_LOCAL_FLOCK;
1578 break;
1579 case Opt_local_lock_posix:
1580 mnt->flags |= NFS_MOUNT_LOCAL_FCNTL;
1581 break;
1582 case Opt_local_lock_none:
1583 mnt->flags &= ~(NFS_MOUNT_LOCAL_FLOCK |
1584 NFS_MOUNT_LOCAL_FCNTL);
1585 break;
1586 default:
1587 dfprintk(MOUNT, "NFS: invalid "
1588 "local_lock argument\n");
1589 return 0;
1590 };
1591 break;
Chuck Leverbf0fd762007-07-01 12:13:44 -04001592
Chuck Leverf45663c2008-06-24 19:28:02 -04001593 /*
1594 * Special options
1595 */
1596 case Opt_sloppy:
1597 sloppy = 1;
1598 dfprintk(MOUNT, "NFS: relaxing parsing rules\n");
1599 break;
Chuck Leverbf0fd762007-07-01 12:13:44 -04001600 case Opt_userspace:
1601 case Opt_deprecated:
Chuck Leverd33e4df2008-06-12 12:37:41 -04001602 dfprintk(MOUNT, "NFS: ignoring mount option "
1603 "'%s'\n", p);
Chuck Leverbf0fd762007-07-01 12:13:44 -04001604 break;
1605
1606 default:
Chuck Leverd23c45f2009-06-17 18:02:13 -07001607 invalid_option = 1;
Chuck Leverf45663c2008-06-24 19:28:02 -04001608 dfprintk(MOUNT, "NFS: unrecognized mount option "
1609 "'%s'\n", p);
Chuck Leverbf0fd762007-07-01 12:13:44 -04001610 }
1611 }
1612
Chuck Leverd23c45f2009-06-17 18:02:13 -07001613 if (!sloppy && invalid_option)
1614 return 0;
1615
Weston Andros Adamson571b7552012-02-01 14:06:41 -05001616 if (mnt->minorversion && mnt->version != 4)
1617 goto out_minorversion_mismatch;
1618
Chuck Lever89652612012-09-14 17:24:11 -04001619 if (mnt->options & NFS_OPTION_MIGRATION &&
NeilBrown9e08ef12013-11-14 13:00:17 +11001620 (mnt->version != 4 || mnt->minorversion != 0))
Chuck Lever89652612012-09-14 17:24:11 -04001621 goto out_migration_misuse;
1622
Jeff Laytonee671b02009-12-03 15:58:56 -05001623 /*
1624 * verify that any proto=/mountproto= options match the address
Peter Meerwald1856b222012-08-18 17:38:54 +02001625 * families in the addr=/mountaddr= options.
Jeff Laytonee671b02009-12-03 15:58:56 -05001626 */
1627 if (protofamily != AF_UNSPEC &&
1628 protofamily != mnt->nfs_server.address.ss_family)
1629 goto out_proto_mismatch;
1630
1631 if (mountfamily != AF_UNSPEC) {
1632 if (mnt->mount_server.addrlen) {
1633 if (mountfamily != mnt->mount_server.address.ss_family)
1634 goto out_mountproto_mismatch;
1635 } else {
1636 if (mountfamily != mnt->nfs_server.address.ss_family)
1637 goto out_mountproto_mismatch;
1638 }
1639 }
1640
Chuck Leverbf0fd762007-07-01 12:13:44 -04001641 return 1;
1642
Jeff Laytonee671b02009-12-03 15:58:56 -05001643out_mountproto_mismatch:
1644 printk(KERN_INFO "NFS: mount server address does not match mountproto= "
1645 "option\n");
1646 return 0;
1647out_proto_mismatch:
1648 printk(KERN_INFO "NFS: server address does not match proto= option\n");
1649 return 0;
Chuck Lever53a0b9c2009-08-09 15:09:36 -04001650out_invalid_address:
1651 printk(KERN_INFO "NFS: bad IP address specified: %s\n", p);
1652 return 0;
Chuck Leverd23c45f2009-06-17 18:02:13 -07001653out_invalid_value:
Chuck Lever53a0b9c2009-08-09 15:09:36 -04001654 printk(KERN_INFO "NFS: bad mount option value specified: %s\n", p);
Chuck Leverd23c45f2009-06-17 18:02:13 -07001655 return 0;
Weston Andros Adamson571b7552012-02-01 14:06:41 -05001656out_minorversion_mismatch:
1657 printk(KERN_INFO "NFS: mount option vers=%u does not support "
1658 "minorversion=%u\n", mnt->version, mnt->minorversion);
1659 return 0;
Chuck Lever89652612012-09-14 17:24:11 -04001660out_migration_misuse:
1661 printk(KERN_INFO
1662 "NFS: 'migration' not supported for this NFS version\n");
1663 return 0;
Chuck Leverbf0fd762007-07-01 12:13:44 -04001664out_nomem:
1665 printk(KERN_INFO "NFS: not enough memory to parse option\n");
1666 return 0;
Eric Parisf9c3a382008-03-05 14:20:18 -05001667out_security_failure:
1668 free_secdata(secdata);
1669 printk(KERN_INFO "NFS: security options invalid: %d\n", rc);
1670 return 0;
Chuck Leverbf0fd762007-07-01 12:13:44 -04001671}
1672
1673/*
Weston Andros Adamson4d4b69d2013-10-18 15:15:19 -04001674 * Ensure that a specified authtype in args->auth_info is supported by
1675 * the server. Returns 0 and sets args->selected_flavor if it's ok, and
1676 * -EACCES if not.
Chuck Leverec88f282009-08-09 15:09:32 -04001677 */
Weston Andros Adamson4d4b69d2013-10-18 15:15:19 -04001678static int nfs_verify_authflavors(struct nfs_parsed_mount_data *args,
Jeff Layton9111c952013-06-27 15:54:41 -04001679 rpc_authflavor_t *server_authlist, unsigned int count)
Chuck Leverec88f282009-08-09 15:09:32 -04001680{
Weston Andros Adamson4d4b69d2013-10-18 15:15:19 -04001681 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
Jeff Layton9111c952013-06-27 15:54:41 -04001682 unsigned int i;
Chuck Lever4580a922013-03-22 12:53:17 -04001683
Chuck Lever4580a922013-03-22 12:53:17 -04001684 /*
Weston Andros Adamsond497ab92013-05-06 17:12:13 -04001685 * If the sec= mount option is used, the specified flavor or AUTH_NULL
1686 * must be in the list returned by the server.
1687 *
1688 * AUTH_NULL has a special meaning when it's in the server list - it
1689 * means that the server will ignore the rpc creds, so any flavor
1690 * can be used.
1691 */
Chuck Lever4580a922013-03-22 12:53:17 -04001692 for (i = 0; i < count; i++) {
Weston Andros Adamson4d4b69d2013-10-18 15:15:19 -04001693 flavor = server_authlist[i];
1694
1695 if (nfs_auth_info_match(&args->auth_info, flavor) ||
1696 flavor == RPC_AUTH_NULL)
Jeff Layton9111c952013-06-27 15:54:41 -04001697 goto out;
Chuck Lever4580a922013-03-22 12:53:17 -04001698 }
1699
Weston Andros Adamson4d4b69d2013-10-18 15:15:19 -04001700 dfprintk(MOUNT,
1701 "NFS: specified auth flavors not supported by server\n");
Weston Andros Adamsond497ab92013-05-06 17:12:13 -04001702 return -EACCES;
Jeff Layton9111c952013-06-27 15:54:41 -04001703
1704out:
Weston Andros Adamson4d4b69d2013-10-18 15:15:19 -04001705 args->selected_flavor = flavor;
Weston Andros Adamsona3f73c22013-10-18 15:15:16 -04001706 dfprintk(MOUNT, "NFS: using auth flavor %u\n", args->selected_flavor);
Jeff Layton9111c952013-06-27 15:54:41 -04001707 return 0;
Chuck Leverec88f282009-08-09 15:09:32 -04001708}
1709
1710/*
Chuck Lever0076d7b2007-07-01 12:13:49 -04001711 * Use the remote server's MOUNT service to request the NFS file handle
1712 * corresponding to the provided path.
1713 */
Bryan Schumaker486aa692012-05-10 15:07:39 -04001714static int nfs_request_mount(struct nfs_parsed_mount_data *args,
Jeff Layton294ae812013-06-27 15:54:39 -04001715 struct nfs_fh *root_fh,
1716 rpc_authflavor_t *server_authlist,
1717 unsigned int *server_authlist_len)
Chuck Lever0076d7b2007-07-01 12:13:49 -04001718{
Chuck Leverc5d120f2008-12-23 15:21:35 -05001719 struct nfs_mount_request request = {
1720 .sap = (struct sockaddr *)
1721 &args->mount_server.address,
1722 .dirpath = args->nfs_server.export_path,
1723 .protocol = args->mount_server.protocol,
1724 .fh = root_fh,
Chuck Lever50a737f2008-12-23 15:21:37 -05001725 .noresvport = args->flags & NFS_MOUNT_NORESVPORT,
Jeff Layton294ae812013-06-27 15:54:39 -04001726 .auth_flav_len = server_authlist_len,
Chuck Leverec88f282009-08-09 15:09:32 -04001727 .auth_flavs = server_authlist,
Stanislav Kinsbursky6d59b8d2012-01-10 16:12:54 +04001728 .net = args->net,
Chuck Leverc5d120f2008-12-23 15:21:35 -05001729 };
Chuck Lever4c568012007-12-10 14:59:28 -05001730 int status;
Chuck Lever0076d7b2007-07-01 12:13:49 -04001731
1732 if (args->mount_server.version == 0) {
Trond Myklebust8a6e5de2009-09-23 14:36:37 -04001733 switch (args->version) {
1734 default:
1735 args->mount_server.version = NFS_MNT3_VERSION;
1736 break;
1737 case 2:
1738 args->mount_server.version = NFS_MNT_VERSION;
1739 }
Chuck Lever0076d7b2007-07-01 12:13:49 -04001740 }
Chuck Leverc5d120f2008-12-23 15:21:35 -05001741 request.version = args->mount_server.version;
Chuck Lever0076d7b2007-07-01 12:13:49 -04001742
Chuck Lever33832032007-12-10 14:59:13 -05001743 if (args->mount_server.hostname)
Chuck Leverc5d120f2008-12-23 15:21:35 -05001744 request.hostname = args->mount_server.hostname;
Chuck Lever33832032007-12-10 14:59:13 -05001745 else
Chuck Leverc5d120f2008-12-23 15:21:35 -05001746 request.hostname = args->nfs_server.hostname;
Chuck Lever33832032007-12-10 14:59:13 -05001747
Chuck Lever0076d7b2007-07-01 12:13:49 -04001748 /*
1749 * Construct the mount server's address.
1750 */
Chuck Lever4c568012007-12-10 14:59:28 -05001751 if (args->mount_server.address.ss_family == AF_UNSPEC) {
Chuck Leverc5d120f2008-12-23 15:21:35 -05001752 memcpy(request.sap, &args->nfs_server.address,
Chuck Lever4c568012007-12-10 14:59:28 -05001753 args->nfs_server.addrlen);
1754 args->mount_server.addrlen = args->nfs_server.addrlen;
1755 }
Chuck Leverc5d120f2008-12-23 15:21:35 -05001756 request.salen = args->mount_server.addrlen;
Trond Myklebustf5855fe2009-10-06 15:40:37 -04001757 nfs_set_port(request.sap, &args->mount_server.port, 0);
Chuck Lever0076d7b2007-07-01 12:13:49 -04001758
1759 /*
1760 * Now ask the mount server to map our export path
1761 * to a file handle.
1762 */
Chuck Leverc5d120f2008-12-23 15:21:35 -05001763 status = nfs_mount(&request);
Chuck Leverec88f282009-08-09 15:09:32 -04001764 if (status != 0) {
1765 dfprintk(MOUNT, "NFS: unable to mount server %s, error %d\n",
1766 request.hostname, status);
1767 return status;
1768 }
Chuck Lever0076d7b2007-07-01 12:13:49 -04001769
Jeff Layton9111c952013-06-27 15:54:41 -04001770 return 0;
Chuck Lever0076d7b2007-07-01 12:13:49 -04001771}
1772
Jeff Laytond17540c2013-06-27 15:54:38 -04001773static struct nfs_server *nfs_try_mount_request(struct nfs_mount_info *mount_info,
1774 struct nfs_subversion *nfs_mod)
1775{
1776 int status;
Jeff Layton9111c952013-06-27 15:54:41 -04001777 unsigned int i;
1778 bool tried_auth_unix = false;
1779 bool auth_null_in_list = false;
1780 struct nfs_server *server = ERR_PTR(-EACCES);
Jeff Layton294ae812013-06-27 15:54:39 -04001781 struct nfs_parsed_mount_data *args = mount_info->parsed;
1782 rpc_authflavor_t authlist[NFS_MAX_SECFLAVORS];
1783 unsigned int authlist_len = ARRAY_SIZE(authlist);
Jeff Laytond17540c2013-06-27 15:54:38 -04001784
Jeff Layton294ae812013-06-27 15:54:39 -04001785 status = nfs_request_mount(args, mount_info->mntfh, authlist,
1786 &authlist_len);
Jeff Laytond17540c2013-06-27 15:54:38 -04001787 if (status)
1788 return ERR_PTR(status);
1789
Jeff Layton9111c952013-06-27 15:54:41 -04001790 /*
1791 * Was a sec= authflavor specified in the options? First, verify
1792 * whether the server supports it, and then just try to use it if so.
1793 */
Weston Andros Adamsona3f73c22013-10-18 15:15:16 -04001794 if (args->auth_info.flavor_len > 0) {
Weston Andros Adamson4d4b69d2013-10-18 15:15:19 -04001795 status = nfs_verify_authflavors(args, authlist, authlist_len);
Weston Andros Adamsona3f73c22013-10-18 15:15:16 -04001796 dfprintk(MOUNT, "NFS: using auth flavor %u\n",
1797 args->selected_flavor);
Jeff Layton9111c952013-06-27 15:54:41 -04001798 if (status)
1799 return ERR_PTR(status);
1800 return nfs_mod->rpc_ops->create_server(mount_info, nfs_mod);
1801 }
1802
1803 /*
1804 * No sec= option was provided. RFC 2623, section 2.7 suggests we
1805 * SHOULD prefer the flavor listed first. However, some servers list
1806 * AUTH_NULL first. Avoid ever choosing AUTH_NULL.
1807 */
1808 for (i = 0; i < authlist_len; ++i) {
1809 rpc_authflavor_t flavor;
1810 struct rpcsec_gss_info info;
1811
1812 flavor = authlist[i];
1813 switch (flavor) {
1814 case RPC_AUTH_UNIX:
1815 tried_auth_unix = true;
1816 break;
1817 case RPC_AUTH_NULL:
1818 auth_null_in_list = true;
1819 continue;
1820 default:
1821 if (rpcauth_get_gssinfo(flavor, &info) != 0)
1822 continue;
1823 /* Fallthrough */
1824 }
1825 dfprintk(MOUNT, "NFS: attempting to use auth flavor %u\n", flavor);
Weston Andros Adamsona3f73c22013-10-18 15:15:16 -04001826 args->selected_flavor = flavor;
Jeff Layton9111c952013-06-27 15:54:41 -04001827 server = nfs_mod->rpc_ops->create_server(mount_info, nfs_mod);
1828 if (!IS_ERR(server))
1829 return server;
1830 }
1831
1832 /*
1833 * Nothing we tried so far worked. At this point, give up if we've
1834 * already tried AUTH_UNIX or if the server's list doesn't contain
1835 * AUTH_NULL
1836 */
1837 if (tried_auth_unix || !auth_null_in_list)
1838 return server;
1839
1840 /* Last chance! Try AUTH_UNIX */
1841 dfprintk(MOUNT, "NFS: attempting to use auth flavor %u\n", RPC_AUTH_UNIX);
Weston Andros Adamsona3f73c22013-10-18 15:15:16 -04001842 args->selected_flavor = RPC_AUTH_UNIX;
Jeff Laytond17540c2013-06-27 15:54:38 -04001843 return nfs_mod->rpc_ops->create_server(mount_info, nfs_mod);
1844}
1845
Bryan Schumakerff9099f22012-07-30 16:05:18 -04001846struct dentry *nfs_try_mount(int flags, const char *dev_name,
1847 struct nfs_mount_info *mount_info,
1848 struct nfs_subversion *nfs_mod)
Bryan Schumaker486aa692012-05-10 15:07:39 -04001849{
Bryan Schumaker486aa692012-05-10 15:07:39 -04001850 struct nfs_server *server;
1851
Jeff Laytond17540c2013-06-27 15:54:38 -04001852 if (mount_info->parsed->need_mount)
1853 server = nfs_try_mount_request(mount_info, nfs_mod);
1854 else
1855 server = nfs_mod->rpc_ops->create_server(mount_info, nfs_mod);
Bryan Schumaker486aa692012-05-10 15:07:39 -04001856
Bryan Schumaker486aa692012-05-10 15:07:39 -04001857 if (IS_ERR(server))
1858 return ERR_CAST(server);
1859
Bryan Schumakerab7017a2012-07-30 16:05:16 -04001860 return nfs_fs_mount_common(server, flags, dev_name, mount_info, nfs_mod);
Bryan Schumaker486aa692012-05-10 15:07:39 -04001861}
Bryan Schumakerddda8e02012-07-30 16:05:23 -04001862EXPORT_SYMBOL_GPL(nfs_try_mount);
Bryan Schumaker486aa692012-05-10 15:07:39 -04001863
Rob Landleyc12bace2011-03-09 15:54:13 -06001864/*
1865 * Split "dev_name" into "hostname:export_path".
1866 *
1867 * The leftmost colon demarks the split between the server's hostname
1868 * and the export path. If the hostname starts with a left square
1869 * bracket, then it may contain colons.
1870 *
1871 * Note: caller frees hostname and export path, even on error.
1872 */
1873static int nfs_parse_devname(const char *dev_name,
1874 char **hostname, size_t maxnamlen,
1875 char **export_path, size_t maxpathlen)
Chuck Leverdc045892008-06-23 12:36:37 -04001876{
1877 size_t len;
Rob Landleyc12bace2011-03-09 15:54:13 -06001878 char *end;
Chuck Leverdc045892008-06-23 12:36:37 -04001879
Rob Landleyc12bace2011-03-09 15:54:13 -06001880 /* Is the host name protected with square brakcets? */
1881 if (*dev_name == '[') {
1882 end = strchr(++dev_name, ']');
1883 if (end == NULL || end[1] != ':')
1884 goto out_bad_devname;
Chuck Leverdc045892008-06-23 12:36:37 -04001885
Rob Landleyc12bace2011-03-09 15:54:13 -06001886 len = end - dev_name;
1887 end++;
1888 } else {
1889 char *comma;
1890
1891 end = strchr(dev_name, ':');
1892 if (end == NULL)
1893 goto out_bad_devname;
1894 len = end - dev_name;
1895
1896 /* kill possible hostname list: not supported */
1897 comma = strchr(dev_name, ',');
1898 if (comma != NULL && comma < end)
1899 *comma = 0;
1900 }
1901
Chuck Leverdc045892008-06-23 12:36:37 -04001902 if (len > maxnamlen)
1903 goto out_hostname;
1904
1905 /* N.B. caller will free nfs_server.hostname in all cases */
1906 *hostname = kstrndup(dev_name, len, GFP_KERNEL);
Rob Landleyc12bace2011-03-09 15:54:13 -06001907 if (*hostname == NULL)
Chuck Leverdc045892008-06-23 12:36:37 -04001908 goto out_nomem;
Rob Landleyc12bace2011-03-09 15:54:13 -06001909 len = strlen(++end);
Chuck Leverdc045892008-06-23 12:36:37 -04001910 if (len > maxpathlen)
1911 goto out_path;
Rob Landleyc12bace2011-03-09 15:54:13 -06001912 *export_path = kstrndup(end, len, GFP_KERNEL);
Chuck Leverdc045892008-06-23 12:36:37 -04001913 if (!*export_path)
1914 goto out_nomem;
1915
1916 dfprintk(MOUNT, "NFS: MNTPATH: '%s'\n", *export_path);
1917 return 0;
1918
1919out_bad_devname:
1920 dfprintk(MOUNT, "NFS: device name not in host:path format\n");
1921 return -EINVAL;
1922
1923out_nomem:
1924 dfprintk(MOUNT, "NFS: not enough memory to parse device name\n");
1925 return -ENOMEM;
1926
1927out_hostname:
1928 dfprintk(MOUNT, "NFS: server hostname too long\n");
1929 return -ENAMETOOLONG;
1930
1931out_path:
1932 dfprintk(MOUNT, "NFS: export pathname too long\n");
1933 return -ENAMETOOLONG;
1934}
1935
1936/*
David Howells54ceac42006-08-22 20:06:13 -04001937 * Validate the NFS2/NFS3 mount data
1938 * - fills in the mount root filehandle
Chuck Lever136d5582007-07-01 12:13:54 -04001939 *
1940 * For option strings, user space handles the following behaviors:
1941 *
1942 * + DNS: mapping server host name to IP address ("addr=" option)
1943 *
1944 * + failure mode: how to behave if a mount request can't be handled
1945 * immediately ("fg/bg" option)
1946 *
1947 * + retry: how often to retry a mount request ("retry=" option)
1948 *
1949 * + breaking back: trying proto=udp after proto=tcp, v2 after v3,
1950 * mountproto=tcp after mountproto=udp, and so on
David Howellsf7b422b2006-06-09 09:34:33 -04001951 */
Bryan Schumakerd72c7272012-05-10 15:07:41 -04001952static int nfs23_validate_mount_data(void *options,
1953 struct nfs_parsed_mount_data *args,
1954 struct nfs_fh *mntfh,
1955 const char *dev_name)
David Howellsf7b422b2006-06-09 09:34:33 -04001956{
\"Talpey, Thomas\2283f8d2007-09-10 13:43:56 -04001957 struct nfs_mount_data *data = (struct nfs_mount_data *)options;
Chuck Lever4cfd74f2009-09-08 19:49:47 -04001958 struct sockaddr *sap = (struct sockaddr *)&args->nfs_server.address;
Trond Myklebust74c98812013-09-07 13:26:57 -04001959 int extra_flags = NFS_MOUNT_LEGACY_INTERFACE;
Chuck Lever136d5582007-07-01 12:13:54 -04001960
Chuck Lever5df36e72007-07-01 12:12:56 -04001961 if (data == NULL)
1962 goto out_no_data;
David Howells54ceac42006-08-22 20:06:13 -04001963
Bryan Schumakerc5afc8d2012-06-08 11:32:56 -04001964 args->version = NFS_DEFAULT_VERSION;
David Howellsf7b422b2006-06-09 09:34:33 -04001965 switch (data->version) {
Chuck Lever5df36e72007-07-01 12:12:56 -04001966 case 1:
1967 data->namlen = 0;
1968 case 2:
1969 data->bsize = 0;
1970 case 3:
1971 if (data->flags & NFS_MOUNT_VER3)
1972 goto out_no_v3;
1973 data->root.size = NFS2_FHSIZE;
1974 memcpy(data->root.data, data->old_root.data, NFS2_FHSIZE);
Trond Myklebust74c98812013-09-07 13:26:57 -04001975 /* Turn off security negotiation */
1976 extra_flags |= NFS_MOUNT_SECFLAVOUR;
Chuck Lever5df36e72007-07-01 12:12:56 -04001977 case 4:
1978 if (data->flags & NFS_MOUNT_SECFLAVOUR)
1979 goto out_no_sec;
1980 case 5:
1981 memset(data->context, 0, sizeof(data->context));
1982 case 6:
Trond Myklebustb7e24452008-06-19 15:21:11 -04001983 if (data->flags & NFS_MOUNT_VER3) {
1984 if (data->root.size > NFS3_FHSIZE || data->root.size == 0)
1985 goto out_invalid_fh;
Chuck Lever5df36e72007-07-01 12:12:56 -04001986 mntfh->size = data->root.size;
Chuck Lever764302c2009-09-08 19:50:03 -04001987 args->version = 3;
1988 } else {
Chuck Lever5df36e72007-07-01 12:12:56 -04001989 mntfh->size = NFS2_FHSIZE;
Chuck Lever764302c2009-09-08 19:50:03 -04001990 args->version = 2;
1991 }
Chuck Lever5df36e72007-07-01 12:12:56 -04001992
Chuck Lever5df36e72007-07-01 12:12:56 -04001993
1994 memcpy(mntfh->data, data->root.data, mntfh->size);
1995 if (mntfh->size < sizeof(mntfh->data))
1996 memset(mntfh->data + mntfh->size, 0,
1997 sizeof(mntfh->data) - mntfh->size);
Chuck Lever6e88e062007-09-24 15:39:50 -04001998
\"Talpey, Thomas\2283f8d2007-09-10 13:43:56 -04001999 /*
2000 * Translate to nfs_parsed_mount_data, which nfs_fill_super
2001 * can deal with.
2002 */
Trond Myklebustff3525a2008-08-15 16:59:14 -04002003 args->flags = data->flags & NFS_MOUNT_FLAGMASK;
Trond Myklebust74c98812013-09-07 13:26:57 -04002004 args->flags |= extra_flags;
\"Talpey, Thomas\2283f8d2007-09-10 13:43:56 -04002005 args->rsize = data->rsize;
2006 args->wsize = data->wsize;
\"Talpey, Thomas\2283f8d2007-09-10 13:43:56 -04002007 args->timeo = data->timeo;
2008 args->retrans = data->retrans;
2009 args->acregmin = data->acregmin;
2010 args->acregmax = data->acregmax;
2011 args->acdirmin = data->acdirmin;
2012 args->acdirmax = data->acdirmax;
Bryan Schumakerb72e4f42012-05-10 15:07:40 -04002013 args->need_mount = false;
Chuck Lever4c568012007-12-10 14:59:28 -05002014
Chuck Lever4cfd74f2009-09-08 19:49:47 -04002015 memcpy(sap, &data->addr, sizeof(data->addr));
Chuck Lever4c568012007-12-10 14:59:28 -05002016 args->nfs_server.addrlen = sizeof(data->addr);
Trond Myklebust872ece82012-09-04 11:05:07 -04002017 args->nfs_server.port = ntohs(data->addr.sin_port);
Chuck Lever4cfd74f2009-09-08 19:49:47 -04002018 if (!nfs_verify_server_address(sap))
Chuck Lever4c568012007-12-10 14:59:28 -05002019 goto out_no_address;
2020
\"Talpey, Thomas\2283f8d2007-09-10 13:43:56 -04002021 if (!(data->flags & NFS_MOUNT_TCP))
\"Talpey, Thomas\0896a722007-09-10 13:48:23 -04002022 args->nfs_server.protocol = XPRT_TRANSPORT_UDP;
\"Talpey, Thomas\2283f8d2007-09-10 13:43:56 -04002023 /* N.B. caller will free nfs_server.hostname in all cases */
2024 args->nfs_server.hostname = kstrdup(data->hostname, GFP_KERNEL);
2025 args->namlen = data->namlen;
2026 args->bsize = data->bsize;
Chuck Leverdd07c942008-06-24 16:33:46 -04002027
2028 if (data->flags & NFS_MOUNT_SECFLAVOUR)
Weston Andros Adamsona3f73c22013-10-18 15:15:16 -04002029 args->selected_flavor = data->pseudoflavor;
Trond Myklebust74c98812013-09-07 13:26:57 -04002030 else
Weston Andros Adamsona3f73c22013-10-18 15:15:16 -04002031 args->selected_flavor = RPC_AUTH_UNIX;
Cyrill Gorcunov63649bd2008-04-17 20:42:09 +04002032 if (!args->nfs_server.hostname)
2033 goto out_nomem;
Eric Parisf9c3a382008-03-05 14:20:18 -05002034
Suresh Jayaraman5eebde22010-09-23 08:55:58 -04002035 if (!(data->flags & NFS_MOUNT_NONLM))
2036 args->flags &= ~(NFS_MOUNT_LOCAL_FLOCK|
2037 NFS_MOUNT_LOCAL_FCNTL);
2038 else
2039 args->flags |= (NFS_MOUNT_LOCAL_FLOCK|
2040 NFS_MOUNT_LOCAL_FCNTL);
Eric Parisf9c3a382008-03-05 14:20:18 -05002041 /*
2042 * The legacy version 6 binary mount data from userspace has a
2043 * field used only to transport selinux information into the
2044 * the kernel. To continue to support that functionality we
2045 * have a touch of selinux knowledge here in the NFS code. The
2046 * userspace code converted context=blah to just blah so we are
2047 * converting back to the full string selinux understands.
2048 */
2049 if (data->context[0]){
2050#ifdef CONFIG_SECURITY_SELINUX
2051 int rc;
2052 char *opts_str = kmalloc(sizeof(data->context) + 8, GFP_KERNEL);
2053 if (!opts_str)
2054 return -ENOMEM;
2055 strcpy(opts_str, "context=");
2056 data->context[NFS_MAX_CONTEXT_LEN] = '\0';
2057 strcat(opts_str, &data->context[0]);
2058 rc = security_sb_parse_opts_str(opts_str, &args->lsm_opts);
2059 kfree(opts_str);
2060 if (rc)
2061 return rc;
2062#else
2063 return -EINVAL;
2064#endif
2065 }
2066
Chuck Lever5df36e72007-07-01 12:12:56 -04002067 break;
Bryan Schumakerb72e4f42012-05-10 15:07:40 -04002068 default:
2069 return NFS_TEXT_DATA;
David Howellsf7b422b2006-06-09 09:34:33 -04002070 }
David Howells54ceac42006-08-22 20:06:13 -04002071
David Howells54ceac42006-08-22 20:06:13 -04002072 return 0;
Chuck Lever5df36e72007-07-01 12:12:56 -04002073
2074out_no_data:
2075 dfprintk(MOUNT, "NFS: mount program didn't pass any mount data\n");
2076 return -EINVAL;
2077
2078out_no_v3:
2079 dfprintk(MOUNT, "NFS: nfs_mount_data version %d does not support v3\n",
2080 data->version);
2081 return -EINVAL;
2082
2083out_no_sec:
2084 dfprintk(MOUNT, "NFS: nfs_mount_data version supports only AUTH_SYS\n");
2085 return -EINVAL;
2086
Cyrill Gorcunov63649bd2008-04-17 20:42:09 +04002087out_nomem:
2088 dfprintk(MOUNT, "NFS: not enough memory to handle mount options\n");
2089 return -ENOMEM;
2090
Chuck Lever5df36e72007-07-01 12:12:56 -04002091out_no_address:
2092 dfprintk(MOUNT, "NFS: mount program didn't pass remote address\n");
2093 return -EINVAL;
2094
2095out_invalid_fh:
2096 dfprintk(MOUNT, "NFS: invalid root filehandle\n");
2097 return -EINVAL;
David Howells54ceac42006-08-22 20:06:13 -04002098}
2099
Bryan Schumaker89d77c82012-07-30 16:05:25 -04002100#if IS_ENABLED(CONFIG_NFS_V4)
Bryan Schumakerd72c7272012-05-10 15:07:41 -04002101static int nfs_validate_mount_data(struct file_system_type *fs_type,
2102 void *options,
2103 struct nfs_parsed_mount_data *args,
2104 struct nfs_fh *mntfh,
2105 const char *dev_name)
2106{
2107 if (fs_type == &nfs_fs_type)
2108 return nfs23_validate_mount_data(options, args, mntfh, dev_name);
2109 return nfs4_validate_mount_data(options, args, dev_name);
2110}
2111#else
2112static int nfs_validate_mount_data(struct file_system_type *fs_type,
2113 void *options,
2114 struct nfs_parsed_mount_data *args,
2115 struct nfs_fh *mntfh,
2116 const char *dev_name)
2117{
2118 return nfs23_validate_mount_data(options, args, mntfh, dev_name);
2119}
2120#endif
2121
Bryan Schumakerb72e4f42012-05-10 15:07:40 -04002122static int nfs_validate_text_mount_data(void *options,
2123 struct nfs_parsed_mount_data *args,
2124 const char *dev_name)
2125{
2126 int port = 0;
2127 int max_namelen = PAGE_SIZE;
2128 int max_pathlen = NFS_MAXPATHLEN;
2129 struct sockaddr *sap = (struct sockaddr *)&args->nfs_server.address;
2130
2131 if (nfs_parse_mount_options((char *)options, args) == 0)
2132 return -EINVAL;
2133
2134 if (!nfs_verify_server_address(sap))
2135 goto out_no_address;
2136
2137 if (args->version == 4) {
Bryan Schumaker89d77c82012-07-30 16:05:25 -04002138#if IS_ENABLED(CONFIG_NFS_V4)
Bryan Schumakerb72e4f42012-05-10 15:07:40 -04002139 port = NFS_PORT;
2140 max_namelen = NFS4_MAXNAMLEN;
2141 max_pathlen = NFS4_MAXPATHLEN;
2142 nfs_validate_transport_protocol(args);
Trond Myklebust6da1a032013-08-07 12:30:52 -04002143 if (args->nfs_server.protocol == XPRT_TRANSPORT_UDP)
2144 goto out_invalid_transport_udp;
Bryan Schumakerb72e4f42012-05-10 15:07:40 -04002145 nfs4_validate_mount_flags(args);
2146#else
2147 goto out_v4_not_compiled;
2148#endif /* CONFIG_NFS_V4 */
2149 } else
2150 nfs_set_mount_transport_protocol(args);
2151
2152 nfs_set_port(sap, &args->nfs_server.port, port);
2153
Bryan Schumakerb72e4f42012-05-10 15:07:40 -04002154 return nfs_parse_devname(dev_name,
2155 &args->nfs_server.hostname,
2156 max_namelen,
2157 &args->nfs_server.export_path,
2158 max_pathlen);
2159
Bryan Schumaker89d77c82012-07-30 16:05:25 -04002160#if !IS_ENABLED(CONFIG_NFS_V4)
Bryan Schumakerb72e4f42012-05-10 15:07:40 -04002161out_v4_not_compiled:
2162 dfprintk(MOUNT, "NFS: NFSv4 is not compiled into kernel\n");
2163 return -EPROTONOSUPPORT;
Trond Myklebust6da1a032013-08-07 12:30:52 -04002164#else
2165out_invalid_transport_udp:
2166 dfprintk(MOUNT, "NFSv4: Unsupported transport protocol udp\n");
2167 return -EINVAL;
Bryan Schumakerb72e4f42012-05-10 15:07:40 -04002168#endif /* !CONFIG_NFS_V4 */
2169
2170out_no_address:
2171 dfprintk(MOUNT, "NFS: mount program didn't pass remote address\n");
2172 return -EINVAL;
Bryan Schumakerb72e4f42012-05-10 15:07:40 -04002173}
2174
Scott Mayhew71a6ec82014-08-04 17:37:27 -04002175#define NFS_REMOUNT_CMP_FLAGMASK ~(NFS_MOUNT_INTR \
Scott Mayhewc8e47022014-05-29 16:41:22 -04002176 | NFS_MOUNT_SECURE \
2177 | NFS_MOUNT_TCP \
2178 | NFS_MOUNT_VER3 \
2179 | NFS_MOUNT_KERBEROS \
2180 | NFS_MOUNT_NONLM \
2181 | NFS_MOUNT_BROKEN_SUID \
2182 | NFS_MOUNT_STRICTLOCK \
Scott Mayhewc8e47022014-05-29 16:41:22 -04002183 | NFS_MOUNT_LEGACY_INTERFACE)
2184
Scott Mayhew71a6ec82014-08-04 17:37:27 -04002185#define NFS_MOUNT_CMP_FLAGMASK (NFS_REMOUNT_CMP_FLAGMASK & \
2186 ~(NFS_MOUNT_UNSHARED | NFS_MOUNT_NORESVPORT))
2187
Jeff Layton48b605f2008-06-10 15:38:39 -04002188static int
2189nfs_compare_remount_data(struct nfs_server *nfss,
2190 struct nfs_parsed_mount_data *data)
2191{
Scott Mayhew71a6ec82014-08-04 17:37:27 -04002192 if ((data->flags ^ nfss->flags) & NFS_REMOUNT_CMP_FLAGMASK ||
Jeff Layton48b605f2008-06-10 15:38:39 -04002193 data->rsize != nfss->rsize ||
2194 data->wsize != nfss->wsize ||
Jeff Layton57acc402013-10-18 10:03:37 -04002195 data->version != nfss->nfs_client->rpc_ops->version ||
2196 data->minorversion != nfss->nfs_client->cl_minorversion ||
Jeff Layton48b605f2008-06-10 15:38:39 -04002197 data->retrans != nfss->client->cl_timeout->to_retries ||
Benjamin Coddington09a330f2014-12-05 21:52:49 -05002198 !nfs_auth_info_match(&data->auth_info, nfss->client->cl_auth->au_flavor) ||
Jeff Layton48b605f2008-06-10 15:38:39 -04002199 data->acregmin != nfss->acregmin / HZ ||
2200 data->acregmax != nfss->acregmax / HZ ||
2201 data->acdirmin != nfss->acdirmin / HZ ||
2202 data->acdirmax != nfss->acdirmax / HZ ||
2203 data->timeo != (10U * nfss->client->cl_timeout->to_initval / HZ) ||
Trond Myklebustbcd2ea12009-10-06 15:41:22 -04002204 data->nfs_server.port != nfss->port ||
Jeff Layton48b605f2008-06-10 15:38:39 -04002205 data->nfs_server.addrlen != nfss->nfs_client->cl_addrlen ||
Stefan Richtera1be9ee2009-10-12 11:26:12 -04002206 !rpc_cmp_addr((struct sockaddr *)&data->nfs_server.address,
2207 (struct sockaddr *)&nfss->nfs_client->cl_addr))
Jeff Layton48b605f2008-06-10 15:38:39 -04002208 return -EINVAL;
2209
2210 return 0;
2211}
2212
Bryan Schumakerfbdefd62012-07-16 16:39:20 -04002213int
Jeff Layton48b605f2008-06-10 15:38:39 -04002214nfs_remount(struct super_block *sb, int *flags, char *raw_data)
2215{
2216 int error;
2217 struct nfs_server *nfss = sb->s_fs_info;
2218 struct nfs_parsed_mount_data *data;
2219 struct nfs_mount_data *options = (struct nfs_mount_data *)raw_data;
2220 struct nfs4_mount_data *options4 = (struct nfs4_mount_data *)raw_data;
Trond Myklebustcd100722008-06-17 16:12:00 -04002221 u32 nfsvers = nfss->nfs_client->rpc_ops->version;
Jeff Layton48b605f2008-06-10 15:38:39 -04002222
Theodore Ts'o02b99842014-03-13 10:14:33 -04002223 sync_filesystem(sb);
2224
Jeff Layton48b605f2008-06-10 15:38:39 -04002225 /*
2226 * Userspace mount programs that send binary options generally send
2227 * them populated with default values. We have no way to know which
2228 * ones were explicitly specified. Fall back to legacy behavior and
2229 * just return success.
2230 */
Marc Zyngier31c94462008-07-17 13:21:55 +02002231 if ((nfsvers == 4 && (!options4 || options4->version == 1)) ||
2232 (nfsvers <= 3 && (!options || (options->version >= 1 &&
2233 options->version <= 6))))
Jeff Layton48b605f2008-06-10 15:38:39 -04002234 return 0;
2235
2236 data = kzalloc(sizeof(*data), GFP_KERNEL);
2237 if (data == NULL)
2238 return -ENOMEM;
2239
2240 /* fill out struct with values from existing mount */
2241 data->flags = nfss->flags;
2242 data->rsize = nfss->rsize;
2243 data->wsize = nfss->wsize;
2244 data->retrans = nfss->client->cl_timeout->to_retries;
Weston Andros Adamsona3f73c22013-10-18 15:15:16 -04002245 data->selected_flavor = nfss->client->cl_auth->au_flavor;
Jeff Layton48b605f2008-06-10 15:38:39 -04002246 data->acregmin = nfss->acregmin / HZ;
2247 data->acregmax = nfss->acregmax / HZ;
2248 data->acdirmin = nfss->acdirmin / HZ;
2249 data->acdirmax = nfss->acdirmax / HZ;
2250 data->timeo = 10U * nfss->client->cl_timeout->to_initval / HZ;
Trond Myklebustbcd2ea12009-10-06 15:41:22 -04002251 data->nfs_server.port = nfss->port;
Jeff Layton48b605f2008-06-10 15:38:39 -04002252 data->nfs_server.addrlen = nfss->nfs_client->cl_addrlen;
Jeff Layton57acc402013-10-18 10:03:37 -04002253 data->version = nfsvers;
2254 data->minorversion = nfss->nfs_client->cl_minorversion;
Mateusz Guzika9147222014-06-10 12:44:12 +02002255 data->net = current->nsproxy->net_ns;
Jeff Layton48b605f2008-06-10 15:38:39 -04002256 memcpy(&data->nfs_server.address, &nfss->nfs_client->cl_addr,
2257 data->nfs_server.addrlen);
2258
2259 /* overwrite those values with any that were specified */
Jeff Layton19669032013-10-21 09:52:19 -04002260 error = -EINVAL;
2261 if (!nfs_parse_mount_options((char *)options, data))
Jeff Layton48b605f2008-06-10 15:38:39 -04002262 goto out;
2263
Jeff Layton26c4c172011-04-27 11:49:09 -04002264 /*
2265 * noac is a special case. It implies -o sync, but that's not
2266 * necessarily reflected in the mtab options. do_remount_sb
2267 * will clear MS_SYNCHRONOUS if -o sync wasn't specified in the
2268 * remount options, so we have to explicitly reset it.
2269 */
2270 if (data->flags & NFS_MOUNT_NOAC)
2271 *flags |= MS_SYNCHRONOUS;
2272
Jeff Layton48b605f2008-06-10 15:38:39 -04002273 /* compare new mount options with old ones */
2274 error = nfs_compare_remount_data(nfss, data);
2275out:
2276 kfree(data);
2277 return error;
2278}
Bryan Schumaker89d77c82012-07-30 16:05:25 -04002279EXPORT_SYMBOL_GPL(nfs_remount);
Jeff Layton48b605f2008-06-10 15:38:39 -04002280
David Howells54ceac42006-08-22 20:06:13 -04002281/*
2282 * Initialise the common bits of the superblock
2283 */
Bryan Schumakerfbdefd62012-07-16 16:39:20 -04002284inline void nfs_initialise_sb(struct super_block *sb)
David Howells54ceac42006-08-22 20:06:13 -04002285{
2286 struct nfs_server *server = NFS_SB(sb);
2287
2288 sb->s_magic = NFS_SUPER_MAGIC;
2289
2290 /* We probably want something more informative here */
2291 snprintf(sb->s_id, sizeof(sb->s_id),
Vivek Trivedi5a7c9ee2012-03-15 23:58:52 +05302292 "%u:%u", MAJOR(sb->s_dev), MINOR(sb->s_dev));
David Howells54ceac42006-08-22 20:06:13 -04002293
2294 if (sb->s_blocksize == 0)
2295 sb->s_blocksize = nfs_block_bits(server->wsize,
2296 &sb->s_blocksize_bits);
2297
Jens Axboe32a88aa2009-09-16 15:02:33 +02002298 sb->s_bdi = &server->backing_dev_info;
2299
David Howells54ceac42006-08-22 20:06:13 -04002300 nfs_super_set_maxbytes(sb, server->maxfilesize);
2301}
2302
2303/*
2304 * Finish setting up an NFS2/3 superblock
2305 */
Bryan Schumakerfbdefd62012-07-16 16:39:20 -04002306void nfs_fill_super(struct super_block *sb, struct nfs_mount_info *mount_info)
David Howells54ceac42006-08-22 20:06:13 -04002307{
Bryan Schumakerc40f8d12012-05-10 15:07:34 -04002308 struct nfs_parsed_mount_data *data = mount_info->parsed;
David Howells54ceac42006-08-22 20:06:13 -04002309 struct nfs_server *server = NFS_SB(sb);
2310
2311 sb->s_blocksize_bits = 0;
2312 sb->s_blocksize = 0;
Bryan Schumaker6a744902012-07-30 16:05:20 -04002313 sb->s_xattr = server->nfs_client->cl_nfs_mod->xattr;
2314 sb->s_op = server->nfs_client->cl_nfs_mod->sops;
2315 if (data && data->bsize)
David Howells54ceac42006-08-22 20:06:13 -04002316 sb->s_blocksize = nfs_block_size(data->bsize, &sb->s_blocksize_bits);
2317
Bryan Schumaker6a744902012-07-30 16:05:20 -04002318 if (server->nfs_client->rpc_ops->version != 2) {
David Howells54ceac42006-08-22 20:06:13 -04002319 /* The VFS shouldn't apply the umask to mode bits. We will do
2320 * so ourselves when necessary.
2321 */
2322 sb->s_flags |= MS_POSIXACL;
2323 sb->s_time_gran = 1;
2324 }
2325
David Howells54ceac42006-08-22 20:06:13 -04002326 nfs_initialise_sb(sb);
2327}
Bryan Schumaker89d77c82012-07-30 16:05:25 -04002328EXPORT_SYMBOL_GPL(nfs_fill_super);
David Howells54ceac42006-08-22 20:06:13 -04002329
2330/*
Bryan Schumaker3cadf4b2012-07-16 16:39:19 -04002331 * Finish setting up a cloned NFS2/3/4 superblock
David Howells54ceac42006-08-22 20:06:13 -04002332 */
Bryan Schumakerfbdefd62012-07-16 16:39:20 -04002333void nfs_clone_super(struct super_block *sb, struct nfs_mount_info *mount_info)
David Howells54ceac42006-08-22 20:06:13 -04002334{
Bryan Schumaker8c958e02012-05-10 15:07:35 -04002335 const struct super_block *old_sb = mount_info->cloned->sb;
David Howells54ceac42006-08-22 20:06:13 -04002336 struct nfs_server *server = NFS_SB(sb);
2337
2338 sb->s_blocksize_bits = old_sb->s_blocksize_bits;
2339 sb->s_blocksize = old_sb->s_blocksize;
2340 sb->s_maxbytes = old_sb->s_maxbytes;
Bryan Schumaker3cadf4b2012-07-16 16:39:19 -04002341 sb->s_xattr = old_sb->s_xattr;
2342 sb->s_op = old_sb->s_op;
2343 sb->s_time_gran = 1;
David Howells54ceac42006-08-22 20:06:13 -04002344
Bryan Schumaker3cadf4b2012-07-16 16:39:19 -04002345 if (server->nfs_client->rpc_ops->version != 2) {
David Howells54ceac42006-08-22 20:06:13 -04002346 /* The VFS shouldn't apply the umask to mode bits. We will do
2347 * so ourselves when necessary.
2348 */
2349 sb->s_flags |= MS_POSIXACL;
David Howells54ceac42006-08-22 20:06:13 -04002350 }
2351
David Howells54ceac42006-08-22 20:06:13 -04002352 nfs_initialise_sb(sb);
2353}
2354
Trond Myklebust275a5d22007-05-16 16:53:28 -04002355static int nfs_compare_mount_options(const struct super_block *s, const struct nfs_server *b, int flags)
2356{
2357 const struct nfs_server *a = s->s_fs_info;
2358 const struct rpc_clnt *clnt_a = a->client;
2359 const struct rpc_clnt *clnt_b = b->client;
2360
2361 if ((s->s_flags & NFS_MS_MASK) != (flags & NFS_MS_MASK))
2362 goto Ebusy;
2363 if (a->nfs_client != b->nfs_client)
2364 goto Ebusy;
Trond Myklebust0aea92b2013-09-07 18:28:10 -04002365 if ((a->flags ^ b->flags) & NFS_MOUNT_CMP_FLAGMASK)
Trond Myklebust275a5d22007-05-16 16:53:28 -04002366 goto Ebusy;
2367 if (a->wsize != b->wsize)
2368 goto Ebusy;
2369 if (a->rsize != b->rsize)
2370 goto Ebusy;
2371 if (a->acregmin != b->acregmin)
2372 goto Ebusy;
2373 if (a->acregmax != b->acregmax)
2374 goto Ebusy;
2375 if (a->acdirmin != b->acdirmin)
2376 goto Ebusy;
2377 if (a->acdirmax != b->acdirmax)
2378 goto Ebusy;
Weston Andros Adamson5837f6d2013-10-18 15:15:18 -04002379 if (b->auth_info.flavor_len > 0 &&
Trond Myklebust0aea92b2013-09-07 18:28:10 -04002380 clnt_a->cl_auth->au_flavor != clnt_b->cl_auth->au_flavor)
Trond Myklebust275a5d22007-05-16 16:53:28 -04002381 goto Ebusy;
Trond Myklebuste89a5a42007-08-31 10:45:17 -04002382 return 1;
Trond Myklebust275a5d22007-05-16 16:53:28 -04002383Ebusy:
Trond Myklebuste89a5a42007-08-31 10:45:17 -04002384 return 0;
2385}
2386
2387struct nfs_sb_mountdata {
2388 struct nfs_server *server;
2389 int mntflags;
2390};
2391
2392static int nfs_set_super(struct super_block *s, void *data)
2393{
2394 struct nfs_sb_mountdata *sb_mntdata = data;
2395 struct nfs_server *server = sb_mntdata->server;
2396 int ret;
2397
2398 s->s_flags = sb_mntdata->mntflags;
2399 s->s_fs_info = server;
Al Viro8b244ff2010-12-18 11:29:39 -05002400 s->s_d_op = server->nfs_client->rpc_ops->dentry_ops;
Trond Myklebuste89a5a42007-08-31 10:45:17 -04002401 ret = set_anon_super(s, server);
2402 if (ret == 0)
2403 server->s_dev = s->s_dev;
2404 return ret;
2405}
2406
Chuck Leverfd00a8f2007-12-10 14:57:38 -05002407static int nfs_compare_super_address(struct nfs_server *server1,
2408 struct nfs_server *server2)
2409{
2410 struct sockaddr *sap1, *sap2;
2411
2412 sap1 = (struct sockaddr *)&server1->nfs_client->cl_addr;
2413 sap2 = (struct sockaddr *)&server2->nfs_client->cl_addr;
2414
2415 if (sap1->sa_family != sap2->sa_family)
2416 return 0;
2417
2418 switch (sap1->sa_family) {
2419 case AF_INET: {
2420 struct sockaddr_in *sin1 = (struct sockaddr_in *)sap1;
2421 struct sockaddr_in *sin2 = (struct sockaddr_in *)sap2;
2422 if (sin1->sin_addr.s_addr != sin2->sin_addr.s_addr)
2423 return 0;
2424 if (sin1->sin_port != sin2->sin_port)
2425 return 0;
2426 break;
2427 }
2428 case AF_INET6: {
2429 struct sockaddr_in6 *sin1 = (struct sockaddr_in6 *)sap1;
2430 struct sockaddr_in6 *sin2 = (struct sockaddr_in6 *)sap2;
2431 if (!ipv6_addr_equal(&sin1->sin6_addr, &sin2->sin6_addr))
2432 return 0;
2433 if (sin1->sin6_port != sin2->sin6_port)
2434 return 0;
2435 break;
2436 }
2437 default:
2438 return 0;
2439 }
2440
2441 return 1;
2442}
2443
Trond Myklebuste89a5a42007-08-31 10:45:17 -04002444static int nfs_compare_super(struct super_block *sb, void *data)
2445{
2446 struct nfs_sb_mountdata *sb_mntdata = data;
2447 struct nfs_server *server = sb_mntdata->server, *old = NFS_SB(sb);
2448 int mntflags = sb_mntdata->mntflags;
2449
Chuck Leverfd00a8f2007-12-10 14:57:38 -05002450 if (!nfs_compare_super_address(old, server))
Trond Myklebuste89a5a42007-08-31 10:45:17 -04002451 return 0;
2452 /* Note: NFS_MOUNT_UNSHARED == NFS4_MOUNT_UNSHARED */
2453 if (old->flags & NFS_MOUNT_UNSHARED)
2454 return 0;
2455 if (memcmp(&old->fsid, &server->fsid, sizeof(old->fsid)) != 0)
2456 return 0;
2457 return nfs_compare_mount_options(sb, server, mntflags);
Trond Myklebust275a5d22007-05-16 16:53:28 -04002458}
2459
Trond Myklebust39ffb922012-05-16 10:21:30 -07002460#ifdef CONFIG_NFS_FSCACHE
Bryan Schumaker2311b942012-05-10 15:07:32 -04002461static void nfs_get_cache_cookie(struct super_block *sb,
2462 struct nfs_parsed_mount_data *parsed,
2463 struct nfs_clone_mount *cloned)
2464{
Trond Myklebustc4271c62012-12-21 11:02:32 -05002465 struct nfs_server *nfss = NFS_SB(sb);
Bryan Schumaker2311b942012-05-10 15:07:32 -04002466 char *uniq = NULL;
2467 int ulen = 0;
2468
Trond Myklebustc4271c62012-12-21 11:02:32 -05002469 nfss->fscache_key = NULL;
2470 nfss->fscache = NULL;
2471
2472 if (parsed) {
2473 if (!(parsed->options & NFS_OPTION_FSCACHE))
2474 return;
2475 if (parsed->fscache_uniq) {
2476 uniq = parsed->fscache_uniq;
2477 ulen = strlen(parsed->fscache_uniq);
2478 }
Bryan Schumaker2311b942012-05-10 15:07:32 -04002479 } else if (cloned) {
2480 struct nfs_server *mnt_s = NFS_SB(cloned->sb);
Trond Myklebustc4271c62012-12-21 11:02:32 -05002481 if (!(mnt_s->options & NFS_OPTION_FSCACHE))
2482 return;
Bryan Schumaker2311b942012-05-10 15:07:32 -04002483 if (mnt_s->fscache_key) {
2484 uniq = mnt_s->fscache_key->key.uniquifier;
2485 ulen = mnt_s->fscache_key->key.uniq_len;
2486 };
Trond Myklebustc4271c62012-12-21 11:02:32 -05002487 } else
2488 return;
Bryan Schumaker2311b942012-05-10 15:07:32 -04002489
2490 nfs_fscache_get_super_cookie(sb, uniq, ulen);
2491}
Trond Myklebust39ffb922012-05-16 10:21:30 -07002492#else
2493static void nfs_get_cache_cookie(struct super_block *sb,
2494 struct nfs_parsed_mount_data *parsed,
2495 struct nfs_clone_mount *cloned)
2496{
2497}
2498#endif
Bryan Schumaker2311b942012-05-10 15:07:32 -04002499
Miklos Szeredifa799752008-04-30 00:54:33 -07002500static int nfs_bdi_register(struct nfs_server *server)
2501{
2502 return bdi_register_dev(&server->backing_dev_info, server->s_dev);
2503}
2504
Bryan Schumakerfbdefd62012-07-16 16:39:20 -04002505int nfs_set_sb_security(struct super_block *s, struct dentry *mntroot,
2506 struct nfs_mount_info *mount_info)
Bryan Schumaker3d176e32012-05-10 15:07:36 -04002507{
David Quigleyaa9c2662013-05-22 12:50:44 -04002508 int error;
2509 unsigned long kflags = 0, kflags_out = 0;
2510 if (NFS_SB(s)->caps & NFS_CAP_SECURITY_LABEL)
2511 kflags |= SECURITY_LSM_NATIVE_LABELS;
2512
2513 error = security_sb_set_mnt_opts(s, &mount_info->parsed->lsm_opts,
2514 kflags, &kflags_out);
2515 if (error)
2516 goto err;
2517
2518 if (NFS_SB(s)->caps & NFS_CAP_SECURITY_LABEL &&
2519 !(kflags_out & SECURITY_LSM_NATIVE_LABELS))
2520 NFS_SB(s)->caps &= ~NFS_CAP_SECURITY_LABEL;
2521err:
2522 return error;
Bryan Schumaker3d176e32012-05-10 15:07:36 -04002523}
Bryan Schumaker89d77c82012-07-30 16:05:25 -04002524EXPORT_SYMBOL_GPL(nfs_set_sb_security);
Bryan Schumaker3d176e32012-05-10 15:07:36 -04002525
Bryan Schumakerfbdefd62012-07-16 16:39:20 -04002526int nfs_clone_sb_security(struct super_block *s, struct dentry *mntroot,
2527 struct nfs_mount_info *mount_info)
Bryan Schumaker3d176e32012-05-10 15:07:36 -04002528{
2529 /* clone any lsm security options from the parent to the new sb */
David Howells2b0143b2015-03-17 22:25:59 +00002530 if (d_inode(mntroot)->i_op != NFS_SB(s)->nfs_client->rpc_ops->dir_inode_ops)
Bryan Schumaker3d176e32012-05-10 15:07:36 -04002531 return -ESTALE;
Jeff Layton094f7b62013-04-01 08:14:24 -04002532 return security_sb_clone_mnt_opts(mount_info->cloned->sb, s);
Bryan Schumaker3d176e32012-05-10 15:07:36 -04002533}
Bryan Schumaker89d77c82012-07-30 16:05:25 -04002534EXPORT_SYMBOL_GPL(nfs_clone_sb_security);
Bryan Schumaker3d176e32012-05-10 15:07:36 -04002535
Bryan Schumakerab7017a2012-07-30 16:05:16 -04002536struct dentry *nfs_fs_mount_common(struct nfs_server *server,
Bryan Schumakerfbdefd62012-07-16 16:39:20 -04002537 int flags, const char *dev_name,
Bryan Schumakerab7017a2012-07-30 16:05:16 -04002538 struct nfs_mount_info *mount_info,
2539 struct nfs_subversion *nfs_mod)
David Howells54ceac42006-08-22 20:06:13 -04002540{
David Howells54ceac42006-08-22 20:06:13 -04002541 struct super_block *s;
Al Viro01194982011-03-16 07:25:36 -04002542 struct dentry *mntroot = ERR_PTR(-ENOMEM);
Trond Myklebust75180df2007-05-16 16:53:28 -04002543 int (*compare_super)(struct super_block *, void *) = nfs_compare_super;
Trond Myklebuste89a5a42007-08-31 10:45:17 -04002544 struct nfs_sb_mountdata sb_mntdata = {
2545 .mntflags = flags,
Bryan Schumakerc40f8d12012-05-10 15:07:34 -04002546 .server = server,
Trond Myklebuste89a5a42007-08-31 10:45:17 -04002547 };
Al Viro01194982011-03-16 07:25:36 -04002548 int error;
David Howells54ceac42006-08-22 20:06:13 -04002549
Trond Myklebust75180df2007-05-16 16:53:28 -04002550 if (server->flags & NFS_MOUNT_UNSHARED)
2551 compare_super = NULL;
2552
Sachin Prabhufb2088c2011-08-01 12:10:12 +01002553 /* -o noac implies -o sync */
2554 if (server->flags & NFS_MOUNT_NOAC)
2555 sb_mntdata.mntflags |= MS_SYNCHRONOUS;
2556
Scott Mayhewe890db02013-07-31 10:01:41 -04002557 if (mount_info->cloned != NULL && mount_info->cloned->sb != NULL)
2558 if (mount_info->cloned->sb->s_flags & MS_SYNCHRONOUS)
2559 sb_mntdata.mntflags |= MS_SYNCHRONOUS;
2560
David Howells54ceac42006-08-22 20:06:13 -04002561 /* Get a superblock - note that we may end up sharing one that already exists */
Bryan Schumakerab7017a2012-07-30 16:05:16 -04002562 s = sget(nfs_mod->nfs_fs, compare_super, nfs_set_super, flags, &sb_mntdata);
Trond Myklebust816724e2006-06-24 08:41:41 -04002563 if (IS_ERR(s)) {
Al Viro01194982011-03-16 07:25:36 -04002564 mntroot = ERR_CAST(s);
David Howells54ceac42006-08-22 20:06:13 -04002565 goto out_err_nosb;
Trond Myklebust816724e2006-06-24 08:41:41 -04002566 }
2567
David Howells54ceac42006-08-22 20:06:13 -04002568 if (s->s_fs_info != server) {
2569 nfs_free_server(server);
2570 server = NULL;
Miklos Szeredifa799752008-04-30 00:54:33 -07002571 } else {
2572 error = nfs_bdi_register(server);
Al Viro01194982011-03-16 07:25:36 -04002573 if (error) {
2574 mntroot = ERR_PTR(error);
Christoph Hellwig7b14a212015-01-14 10:42:39 +01002575 goto error_splat_super;
Al Viro01194982011-03-16 07:25:36 -04002576 }
Chuck Leverce6cda12013-10-17 14:12:56 -04002577 server->super = s;
David Howellsf7b422b2006-06-09 09:34:33 -04002578 }
David Howells54ceac42006-08-22 20:06:13 -04002579
2580 if (!s->s_root) {
2581 /* initial superblock/root creation */
Bryan Schumakerc40f8d12012-05-10 15:07:34 -04002582 mount_info->fill_super(s, mount_info);
Bryan Schumaker3d176e32012-05-10 15:07:36 -04002583 nfs_get_cache_cookie(s, mount_info->parsed, mount_info->cloned);
David Howells54ceac42006-08-22 20:06:13 -04002584 }
2585
Bryan Schumaker87c70832012-05-10 15:07:43 -04002586 mntroot = nfs_get_root(s, mount_info->mntfh, dev_name);
Al Viro01194982011-03-16 07:25:36 -04002587 if (IS_ERR(mntroot))
David Howells54ceac42006-08-22 20:06:13 -04002588 goto error_splat_super;
David Howells54ceac42006-08-22 20:06:13 -04002589
Bryan Schumaker3d176e32012-05-10 15:07:36 -04002590 error = mount_info->set_security(s, mntroot, mount_info);
Eric Parisf9c3a382008-03-05 14:20:18 -05002591 if (error)
2592 goto error_splat_root;
2593
David Howellsf7b422b2006-06-09 09:34:33 -04002594 s->s_flags |= MS_ACTIVE;
Chuck Lever06559602007-07-01 12:12:35 -04002595
2596out:
Al Viro01194982011-03-16 07:25:36 -04002597 return mntroot;
Trond Myklebust816724e2006-06-24 08:41:41 -04002598
David Howells54ceac42006-08-22 20:06:13 -04002599out_err_nosb:
2600 nfs_free_server(server);
Chuck Lever06559602007-07-01 12:12:35 -04002601 goto out;
David Howells54ceac42006-08-22 20:06:13 -04002602
Eric Parisf9c3a382008-03-05 14:20:18 -05002603error_splat_root:
2604 dput(mntroot);
Al Viro01194982011-03-16 07:25:36 -04002605 mntroot = ERR_PTR(error);
David Howells54ceac42006-08-22 20:06:13 -04002606error_splat_super:
Al Viro6f5bbff2009-05-06 01:34:22 -04002607 deactivate_locked_super(s);
Chuck Lever06559602007-07-01 12:12:35 -04002608 goto out;
David Howellsf7b422b2006-06-09 09:34:33 -04002609}
Bryan Schumaker89d77c82012-07-30 16:05:25 -04002610EXPORT_SYMBOL_GPL(nfs_fs_mount_common);
David Howellsf7b422b2006-06-09 09:34:33 -04002611
Bryan Schumakerfbdefd62012-07-16 16:39:20 -04002612struct dentry *nfs_fs_mount(struct file_system_type *fs_type,
Bryan Schumakerc40f8d12012-05-10 15:07:34 -04002613 int flags, const char *dev_name, void *raw_data)
2614{
Bryan Schumakerc40f8d12012-05-10 15:07:34 -04002615 struct nfs_mount_info mount_info = {
2616 .fill_super = nfs_fill_super,
Bryan Schumaker3d176e32012-05-10 15:07:36 -04002617 .set_security = nfs_set_sb_security,
Bryan Schumakerc40f8d12012-05-10 15:07:34 -04002618 };
Bryan Schumakerc40f8d12012-05-10 15:07:34 -04002619 struct dentry *mntroot = ERR_PTR(-ENOMEM);
Bryan Schumakerab7017a2012-07-30 16:05:16 -04002620 struct nfs_subversion *nfs_mod;
Bryan Schumakerc40f8d12012-05-10 15:07:34 -04002621 int error;
2622
Bryan Schumaker46058d42012-05-10 15:07:42 -04002623 mount_info.parsed = nfs_alloc_parsed_mount_data();
Bryan Schumaker87c70832012-05-10 15:07:43 -04002624 mount_info.mntfh = nfs_alloc_fhandle();
2625 if (mount_info.parsed == NULL || mount_info.mntfh == NULL)
Bryan Schumakerc40f8d12012-05-10 15:07:34 -04002626 goto out;
2627
2628 /* Validate the mount data */
Bryan Schumaker87c70832012-05-10 15:07:43 -04002629 error = nfs_validate_mount_data(fs_type, raw_data, mount_info.parsed, mount_info.mntfh, dev_name);
Bryan Schumakerb72e4f42012-05-10 15:07:40 -04002630 if (error == NFS_TEXT_DATA)
Bryan Schumaker46058d42012-05-10 15:07:42 -04002631 error = nfs_validate_text_mount_data(raw_data, mount_info.parsed, dev_name);
Bryan Schumakerc40f8d12012-05-10 15:07:34 -04002632 if (error < 0) {
2633 mntroot = ERR_PTR(error);
2634 goto out;
2635 }
Bryan Schumakerc40f8d12012-05-10 15:07:34 -04002636
Bryan Schumakerab7017a2012-07-30 16:05:16 -04002637 nfs_mod = get_nfs_version(mount_info.parsed->version);
2638 if (IS_ERR(nfs_mod)) {
2639 mntroot = ERR_CAST(nfs_mod);
2640 goto out;
2641 }
2642
Bryan Schumakerff9099f22012-07-30 16:05:18 -04002643 mntroot = nfs_mod->rpc_ops->try_mount(flags, dev_name, &mount_info, nfs_mod);
Bryan Schumakerab7017a2012-07-30 16:05:16 -04002644
2645 put_nfs_version(nfs_mod);
Bryan Schumakerc40f8d12012-05-10 15:07:34 -04002646out:
Bryan Schumaker46058d42012-05-10 15:07:42 -04002647 nfs_free_parsed_mount_data(mount_info.parsed);
Bryan Schumaker87c70832012-05-10 15:07:43 -04002648 nfs_free_fhandle(mount_info.mntfh);
Bryan Schumakerc40f8d12012-05-10 15:07:34 -04002649 return mntroot;
2650}
Bryan Schumaker89d77c82012-07-30 16:05:25 -04002651EXPORT_SYMBOL_GPL(nfs_fs_mount);
Bryan Schumakerc40f8d12012-05-10 15:07:34 -04002652
David Howells54ceac42006-08-22 20:06:13 -04002653/*
2654 * Destroy an NFS2/3 superblock
2655 */
Bryan Schumakerfbdefd62012-07-16 16:39:20 -04002656void nfs_kill_super(struct super_block *s)
David Howellsf7b422b2006-06-09 09:34:33 -04002657{
2658 struct nfs_server *server = NFS_SB(s);
Christoph Hellwig7b14a212015-01-14 10:42:39 +01002659 dev_t dev = s->s_dev;
David Howellsf7b422b2006-06-09 09:34:33 -04002660
Christoph Hellwig7b14a212015-01-14 10:42:39 +01002661 generic_shutdown_super(s);
2662
David Howells08734042009-04-03 16:42:42 +01002663 nfs_fscache_release_super_cookie(s);
Christoph Hellwig7b14a212015-01-14 10:42:39 +01002664
David Howells54ceac42006-08-22 20:06:13 -04002665 nfs_free_server(server);
Christoph Hellwig7b14a212015-01-14 10:42:39 +01002666 free_anon_bdev(dev);
David Howellsf7b422b2006-06-09 09:34:33 -04002667}
Bryan Schumaker89d77c82012-07-30 16:05:25 -04002668EXPORT_SYMBOL_GPL(nfs_kill_super);
David Howellsf7b422b2006-06-09 09:34:33 -04002669
David Howells54ceac42006-08-22 20:06:13 -04002670/*
Bryan Schumaker8c958e02012-05-10 15:07:35 -04002671 * Clone an NFS2/3/4 server record on xdev traversal (FSID-change)
David Howells54ceac42006-08-22 20:06:13 -04002672 */
Stanislav Kinsbursky3dd4f8ef2012-10-02 14:19:04 +04002673static struct dentry *
Bryan Schumakere8f25e62012-07-30 16:05:17 -04002674nfs_xdev_mount(struct file_system_type *fs_type, int flags,
2675 const char *dev_name, void *raw_data)
David Howellsf7b422b2006-06-09 09:34:33 -04002676{
Bryan Schumakere8f25e62012-07-30 16:05:17 -04002677 struct nfs_clone_mount *data = raw_data;
2678 struct nfs_mount_info mount_info = {
2679 .fill_super = nfs_clone_super,
2680 .set_security = nfs_clone_sb_security,
2681 .cloned = data,
2682 };
David Howells54ceac42006-08-22 20:06:13 -04002683 struct nfs_server *server;
Bryan Schumaker3d176e32012-05-10 15:07:36 -04002684 struct dentry *mntroot = ERR_PTR(-ENOMEM);
Bryan Schumakerab7017a2012-07-30 16:05:16 -04002685 struct nfs_subversion *nfs_mod = NFS_SB(data->sb)->nfs_client->cl_nfs_mod;
David Howells54ceac42006-08-22 20:06:13 -04002686
Trond Myklebustdee972b2013-01-16 15:05:44 -05002687 dprintk("--> nfs_xdev_mount()\n");
David Howells54ceac42006-08-22 20:06:13 -04002688
Bryan Schumakere8f25e62012-07-30 16:05:17 -04002689 mount_info.mntfh = mount_info.cloned->fh;
Bryan Schumaker87c70832012-05-10 15:07:43 -04002690
David Howells54ceac42006-08-22 20:06:13 -04002691 /* create a new volume representation */
Bryan Schumaker1179acc2012-07-30 16:05:19 -04002692 server = nfs_mod->rpc_ops->clone_server(NFS_SB(data->sb), data->fh, data->fattr, data->authflavor);
David Howells54ceac42006-08-22 20:06:13 -04002693
Trond Myklebustdee972b2013-01-16 15:05:44 -05002694 if (IS_ERR(server))
2695 mntroot = ERR_CAST(server);
2696 else
2697 mntroot = nfs_fs_mount_common(server, flags,
2698 dev_name, &mount_info, nfs_mod);
2699
2700 dprintk("<-- nfs_xdev_mount() = %ld\n",
2701 IS_ERR(mntroot) ? PTR_ERR(mntroot) : 0L);
Al Viro31f43472010-10-29 03:38:12 -04002702 return mntroot;
David Howellsf7b422b2006-06-09 09:34:33 -04002703}
2704
Bryan Schumaker89d77c82012-07-30 16:05:25 -04002705#if IS_ENABLED(CONFIG_NFS_V4)
David Howells54ceac42006-08-22 20:06:13 -04002706
Trond Myklebust01c3f052009-06-17 13:22:58 -07002707static void nfs4_validate_mount_flags(struct nfs_parsed_mount_data *args)
2708{
Suresh Jayaraman5eebde22010-09-23 08:55:58 -04002709 args->flags &= ~(NFS_MOUNT_NONLM|NFS_MOUNT_NOACL|NFS_MOUNT_VER3|
2710 NFS_MOUNT_LOCAL_FLOCK|NFS_MOUNT_LOCAL_FCNTL);
Trond Myklebust01c3f052009-06-17 13:22:58 -07002711}
2712
David Howells54ceac42006-08-22 20:06:13 -04002713/*
Chuck Leverf0768eb2007-07-01 12:13:01 -04002714 * Validate NFSv4 mount options
2715 */
\"Talpey, Thomas\91ea40b2007-09-10 13:44:33 -04002716static int nfs4_validate_mount_data(void *options,
2717 struct nfs_parsed_mount_data *args,
2718 const char *dev_name)
Chuck Leverf0768eb2007-07-01 12:13:01 -04002719{
Chuck Lever4cfd74f2009-09-08 19:49:47 -04002720 struct sockaddr *sap = (struct sockaddr *)&args->nfs_server.address;
\"Talpey, Thomas\91ea40b2007-09-10 13:44:33 -04002721 struct nfs4_mount_data *data = (struct nfs4_mount_data *)options;
Chuck Leverf0768eb2007-07-01 12:13:01 -04002722 char *c;
2723
2724 if (data == NULL)
2725 goto out_no_data;
2726
Bryan Schumakercdf66442012-06-05 14:59:54 -04002727 args->version = 4;
2728
Chuck Leverf0768eb2007-07-01 12:13:01 -04002729 switch (data->version) {
2730 case 1:
Chuck Lever4c568012007-12-10 14:59:28 -05002731 if (data->host_addrlen > sizeof(args->nfs_server.address))
Chuck Leverf0768eb2007-07-01 12:13:01 -04002732 goto out_no_address;
Chuck Lever4c568012007-12-10 14:59:28 -05002733 if (data->host_addrlen == 0)
2734 goto out_no_address;
2735 args->nfs_server.addrlen = data->host_addrlen;
Chuck Lever4cfd74f2009-09-08 19:49:47 -04002736 if (copy_from_user(sap, data->host_addr, data->host_addrlen))
Chuck Leverf0768eb2007-07-01 12:13:01 -04002737 return -EFAULT;
Chuck Lever4cfd74f2009-09-08 19:49:47 -04002738 if (!nfs_verify_server_address(sap))
Chuck Leverf0768eb2007-07-01 12:13:01 -04002739 goto out_no_address;
Trond Myklebust872ece82012-09-04 11:05:07 -04002740 args->nfs_server.port = ntohs(((struct sockaddr_in *)sap)->sin_port);
Chuck Leverf0768eb2007-07-01 12:13:01 -04002741
Chuck Lever6738b252008-06-24 16:33:54 -04002742 if (data->auth_flavourlen) {
Trond Myklebust74c98812013-09-07 13:26:57 -04002743 rpc_authflavor_t pseudoflavor;
Chuck Lever6738b252008-06-24 16:33:54 -04002744 if (data->auth_flavourlen > 1)
2745 goto out_inval_auth;
Trond Myklebust74c98812013-09-07 13:26:57 -04002746 if (copy_from_user(&pseudoflavor,
\"Talpey, Thomas\91ea40b2007-09-10 13:44:33 -04002747 data->auth_flavours,
Trond Myklebust74c98812013-09-07 13:26:57 -04002748 sizeof(pseudoflavor)))
Chuck Leverf0768eb2007-07-01 12:13:01 -04002749 return -EFAULT;
Weston Andros Adamsona3f73c22013-10-18 15:15:16 -04002750 args->selected_flavor = pseudoflavor;
Trond Myklebust74c98812013-09-07 13:26:57 -04002751 } else
Weston Andros Adamsona3f73c22013-10-18 15:15:16 -04002752 args->selected_flavor = RPC_AUTH_UNIX;
Chuck Leverf0768eb2007-07-01 12:13:01 -04002753
2754 c = strndup_user(data->hostname.data, NFS4_MAXNAMLEN);
2755 if (IS_ERR(c))
2756 return PTR_ERR(c);
\"Talpey, Thomas\91ea40b2007-09-10 13:44:33 -04002757 args->nfs_server.hostname = c;
Chuck Leverf0768eb2007-07-01 12:13:01 -04002758
2759 c = strndup_user(data->mnt_path.data, NFS4_MAXPATHLEN);
2760 if (IS_ERR(c))
2761 return PTR_ERR(c);
\"Talpey, Thomas\91ea40b2007-09-10 13:44:33 -04002762 args->nfs_server.export_path = c;
2763 dfprintk(MOUNT, "NFS: MNTPATH: '%s'\n", c);
Chuck Leverf0768eb2007-07-01 12:13:01 -04002764
2765 c = strndup_user(data->client_addr.data, 16);
2766 if (IS_ERR(c))
2767 return PTR_ERR(c);
\"Talpey, Thomas\91ea40b2007-09-10 13:44:33 -04002768 args->client_address = c;
2769
2770 /*
2771 * Translate to nfs_parsed_mount_data, which nfs4_fill_super
2772 * can deal with.
2773 */
2774
2775 args->flags = data->flags & NFS4_MOUNT_FLAGMASK;
2776 args->rsize = data->rsize;
2777 args->wsize = data->wsize;
2778 args->timeo = data->timeo;
2779 args->retrans = data->retrans;
2780 args->acregmin = data->acregmin;
2781 args->acregmax = data->acregmax;
2782 args->acdirmin = data->acdirmin;
2783 args->acdirmax = data->acdirmax;
2784 args->nfs_server.protocol = data->proto;
Trond Myklebust259875e2008-07-02 14:43:47 -04002785 nfs_validate_transport_protocol(args);
Trond Myklebust6da1a032013-08-07 12:30:52 -04002786 if (args->nfs_server.protocol == XPRT_TRANSPORT_UDP)
2787 goto out_invalid_transport_udp;
Chuck Leverf0768eb2007-07-01 12:13:01 -04002788
2789 break;
Chuck Lever7630c852009-09-08 19:49:57 -04002790 default:
Bryan Schumakerb72e4f42012-05-10 15:07:40 -04002791 return NFS_TEXT_DATA;
Chuck Leverf0768eb2007-07-01 12:13:01 -04002792 }
2793
2794 return 0;
2795
2796out_no_data:
2797 dfprintk(MOUNT, "NFS4: mount program didn't pass any mount data\n");
2798 return -EINVAL;
2799
2800out_inval_auth:
2801 dfprintk(MOUNT, "NFS4: Invalid number of RPC auth flavours %d\n",
2802 data->auth_flavourlen);
2803 return -EINVAL;
2804
2805out_no_address:
2806 dfprintk(MOUNT, "NFS4: mount program didn't pass remote address\n");
2807 return -EINVAL;
Trond Myklebust6da1a032013-08-07 12:30:52 -04002808
2809out_invalid_transport_udp:
2810 dfprintk(MOUNT, "NFSv4: Unsupported transport protocol udp\n");
2811 return -EINVAL;
Chuck Leverf0768eb2007-07-01 12:13:01 -04002812}
2813
Bryan Schumakerfac1e8e2012-07-30 16:05:22 -04002814/*
2815 * NFS v4 module parameters need to stay in the
2816 * NFS client for backwards compatibility
2817 */
2818unsigned int nfs_callback_set_tcpport;
2819unsigned short nfs_callback_tcpport;
2820/* Default cache timeout is 10 minutes */
2821unsigned int nfs_idmap_cache_timeout = 600;
2822/* Turn off NFSv4 uid/gid mapping when using AUTH_SYS */
2823bool nfs4_disable_idmapping = true;
2824unsigned short max_session_slots = NFS4_DEF_SLOT_TABLE_SIZE;
2825unsigned short send_implementation_id = 1;
Chuck Lever6f2ea7f2012-09-14 17:24:41 -04002826char nfs4_client_id_uniquifier[NFS4_CLIENT_ID_UNIQ_LEN] = "";
Trond Myklebustf6de7a32013-09-04 10:08:54 -04002827bool recover_lost_locks = false;
Bryan Schumakerfac1e8e2012-07-30 16:05:22 -04002828
Bryan Schumaker89d77c82012-07-30 16:05:25 -04002829EXPORT_SYMBOL_GPL(nfs_callback_set_tcpport);
2830EXPORT_SYMBOL_GPL(nfs_callback_tcpport);
2831EXPORT_SYMBOL_GPL(nfs_idmap_cache_timeout);
2832EXPORT_SYMBOL_GPL(nfs4_disable_idmapping);
2833EXPORT_SYMBOL_GPL(max_session_slots);
2834EXPORT_SYMBOL_GPL(send_implementation_id);
Chuck Lever6f2ea7f2012-09-14 17:24:41 -04002835EXPORT_SYMBOL_GPL(nfs4_client_id_uniquifier);
Trond Myklebustf6de7a32013-09-04 10:08:54 -04002836EXPORT_SYMBOL_GPL(recover_lost_locks);
Bryan Schumaker89d77c82012-07-30 16:05:25 -04002837
Bryan Schumakerfac1e8e2012-07-30 16:05:22 -04002838#define NFS_CALLBACK_MAXPORTNR (65535U)
2839
2840static int param_set_portnr(const char *val, const struct kernel_param *kp)
2841{
2842 unsigned long num;
2843 int ret;
2844
2845 if (!val)
2846 return -EINVAL;
Daniel Walter7297cb62012-09-26 21:51:46 +02002847 ret = kstrtoul(val, 0, &num);
Bryan Schumakerfac1e8e2012-07-30 16:05:22 -04002848 if (ret == -EINVAL || num > NFS_CALLBACK_MAXPORTNR)
2849 return -EINVAL;
2850 *((unsigned int *)kp->arg) = num;
2851 return 0;
2852}
Luis R. Rodriguez9c278472015-05-27 11:09:38 +09302853static const struct kernel_param_ops param_ops_portnr = {
Bryan Schumakerfac1e8e2012-07-30 16:05:22 -04002854 .set = param_set_portnr,
2855 .get = param_get_uint,
2856};
2857#define param_check_portnr(name, p) __param_check(name, p, unsigned int);
2858
2859module_param_named(callback_tcpport, nfs_callback_set_tcpport, portnr, 0644);
2860module_param(nfs_idmap_cache_timeout, int, 0644);
2861module_param(nfs4_disable_idmapping, bool, 0644);
Chuck Lever6f2ea7f2012-09-14 17:24:41 -04002862module_param_string(nfs4_unique_id, nfs4_client_id_uniquifier,
2863 NFS4_CLIENT_ID_UNIQ_LEN, 0600);
Bryan Schumakerfac1e8e2012-07-30 16:05:22 -04002864MODULE_PARM_DESC(nfs4_disable_idmapping,
2865 "Turn off NFSv4 idmapping when using 'sec=sys'");
2866module_param(max_session_slots, ushort, 0644);
2867MODULE_PARM_DESC(max_session_slots, "Maximum number of outstanding NFSv4.1 "
2868 "requests the client will negotiate");
2869module_param(send_implementation_id, ushort, 0644);
2870MODULE_PARM_DESC(send_implementation_id,
2871 "Send implementation ID with NFSv4.1 exchange_id");
Chuck Lever6f2ea7f2012-09-14 17:24:41 -04002872MODULE_PARM_DESC(nfs4_unique_id, "nfs_client_id4 uniquifier string");
bjschuma@gmail.com425e7762012-08-08 13:57:10 -04002873
Trond Myklebustf6de7a32013-09-04 10:08:54 -04002874module_param(recover_lost_locks, bool, 0644);
2875MODULE_PARM_DESC(recover_lost_locks,
2876 "If the server reports that a lock might be lost, "
2877 "try to recover it risking data corruption.");
2878
2879
David Howells54ceac42006-08-22 20:06:13 -04002880#endif /* CONFIG_NFS_V4 */