David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 1 | /* |
| 2 | * linux/fs/nfs/super.c |
| 3 | * |
| 4 | * Copyright (C) 1992 Rick Sladkey |
| 5 | * |
| 6 | * nfs superblock handling functions |
| 7 | * |
Alan Cox | 526719b | 2008-10-27 15:19:48 +0000 | [diff] [blame] | 8 | * Modularised by Alan Cox <alan@lxorguk.ukuu.org.uk>, while hacking some |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 9 | * experimental NFS changes. Modularisation taken straight from SYS5 fs. |
| 10 | * |
| 11 | * Change to nfs_read_super() to permit NFS mounts to multi-homed hosts. |
| 12 | * J.S.Peatfield@damtp.cam.ac.uk |
| 13 | * |
| 14 | * Split from inode.c by David Howells <dhowells@redhat.com> |
| 15 | * |
David Howells | 54ceac4 | 2006-08-22 20:06:13 -0400 | [diff] [blame] | 16 | * - superblocks are indexed on server only - all inodes, dentries, etc. associated with a |
| 17 | * particular server are held in the same superblock |
| 18 | * - NFS superblocks can have several effective roots to the dentry tree |
| 19 | * - directory type roots are spliced into the tree when a path from one root reaches the root |
| 20 | * of another (see nfs_lookup()) |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 21 | */ |
| 22 | |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 23 | #include <linux/module.h> |
| 24 | #include <linux/init.h> |
| 25 | |
| 26 | #include <linux/time.h> |
| 27 | #include <linux/kernel.h> |
| 28 | #include <linux/mm.h> |
| 29 | #include <linux/string.h> |
| 30 | #include <linux/stat.h> |
| 31 | #include <linux/errno.h> |
| 32 | #include <linux/unistd.h> |
| 33 | #include <linux/sunrpc/clnt.h> |
Jeff Layton | 5976687 | 2013-02-04 12:50:00 -0500 | [diff] [blame] | 34 | #include <linux/sunrpc/addr.h> |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 35 | #include <linux/sunrpc/stats.h> |
| 36 | #include <linux/sunrpc/metrics.h> |
\"Talpey, Thomas\ | 0896a72 | 2007-09-10 13:48:23 -0400 | [diff] [blame] | 37 | #include <linux/sunrpc/xprtsock.h> |
\"Talpey, Thomas\ | 2cf7ff7 | 2007-09-10 13:49:41 -0400 | [diff] [blame] | 38 | #include <linux/sunrpc/xprtrdma.h> |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 39 | #include <linux/nfs_fs.h> |
| 40 | #include <linux/nfs_mount.h> |
| 41 | #include <linux/nfs4_mount.h> |
| 42 | #include <linux/lockd/bind.h> |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 43 | #include <linux/seq_file.h> |
| 44 | #include <linux/mount.h> |
Trond Myklebust | c02d7ad | 2009-06-22 15:09:14 -0400 | [diff] [blame] | 45 | #include <linux/namei.h> |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 46 | #include <linux/vfs.h> |
| 47 | #include <linux/inet.h> |
Chuck Lever | fd00a8f | 2007-12-10 14:57:38 -0500 | [diff] [blame] | 48 | #include <linux/in6.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 49 | #include <linux/slab.h> |
Chuck Lever | fd00a8f | 2007-12-10 14:57:38 -0500 | [diff] [blame] | 50 | #include <net/ipv6.h> |
Chuck Lever | d8e7748 | 2008-06-23 12:37:01 -0400 | [diff] [blame] | 51 | #include <linux/netdevice.h> |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 52 | #include <linux/nfs_xdr.h> |
Adrian Bunk | b5d5dfb | 2007-02-12 00:53:40 -0800 | [diff] [blame] | 53 | #include <linux/magic.h> |
Chuck Lever | bf0fd76 | 2007-07-01 12:13:44 -0400 | [diff] [blame] | 54 | #include <linux/parser.h> |
Stanislav Kinsbursky | e50a7a1 | 2012-01-10 16:12:46 +0400 | [diff] [blame] | 55 | #include <linux/nsproxy.h> |
Trond Myklebust | 2446ab6 | 2012-03-01 17:00:56 -0500 | [diff] [blame] | 56 | #include <linux/rcupdate.h> |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 57 | |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 58 | #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 Howells | 0873404 | 2009-04-03 16:42:42 +0100 | [diff] [blame] | 65 | #include "fscache.h" |
Trond Myklebust | 76e697b | 2012-11-26 14:20:49 -0500 | [diff] [blame] | 66 | #include "nfs4session.h" |
J. Bruce Fields | ae50c0b | 2011-05-22 19:48:21 +0300 | [diff] [blame] | 67 | #include "pnfs.h" |
Bryan Schumaker | ab7017a | 2012-07-30 16:05:16 -0400 | [diff] [blame] | 68 | #include "nfs.h" |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 69 | |
| 70 | #define NFSDBG_FACILITY NFSDBG_VFS |
Bryan Schumaker | b72e4f4 | 2012-05-10 15:07:40 -0400 | [diff] [blame] | 71 | #define NFS_TEXT_DATA 1 |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 72 | |
Bryan Schumaker | 1c606fb | 2012-07-30 16:05:24 -0400 | [diff] [blame] | 73 | #if IS_ENABLED(CONFIG_NFS_V3) |
Paulius Zaleckas | 1e657bd | 2010-10-31 18:21:05 +0200 | [diff] [blame] | 74 | #define NFS_DEFAULT_VERSION 3 |
| 75 | #else |
| 76 | #define NFS_DEFAULT_VERSION 2 |
| 77 | #endif |
| 78 | |
Chuck Lever | bf0fd76 | 2007-07-01 12:13:44 -0400 | [diff] [blame] | 79 | enum { |
| 80 | /* Mount options that take no arguments */ |
| 81 | Opt_soft, Opt_hard, |
Chuck Lever | bf0fd76 | 2007-07-01 12:13:44 -0400 | [diff] [blame] | 82 | Opt_posix, Opt_noposix, |
| 83 | Opt_cto, Opt_nocto, |
| 84 | Opt_ac, Opt_noac, |
| 85 | Opt_lock, Opt_nolock, |
\"Talpey, Thomas\ | 2cf7ff7 | 2007-09-10 13:49:41 -0400 | [diff] [blame] | 86 | Opt_udp, Opt_tcp, Opt_rdma, |
Chuck Lever | bf0fd76 | 2007-07-01 12:13:44 -0400 | [diff] [blame] | 87 | Opt_acl, Opt_noacl, |
| 88 | Opt_rdirplus, Opt_nordirplus, |
Trond Myklebust | 75180df | 2007-05-16 16:53:28 -0400 | [diff] [blame] | 89 | Opt_sharecache, Opt_nosharecache, |
Chuck Lever | d740351 | 2008-12-23 15:21:37 -0500 | [diff] [blame] | 90 | Opt_resvport, Opt_noresvport, |
David Howells | b797cac | 2009-04-03 16:42:48 +0100 | [diff] [blame] | 91 | Opt_fscache, Opt_nofscache, |
Chuck Lever | 8965261 | 2012-09-14 17:24:11 -0400 | [diff] [blame] | 92 | Opt_migration, Opt_nomigration, |
Chuck Lever | bf0fd76 | 2007-07-01 12:13:44 -0400 | [diff] [blame] | 93 | |
| 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 Lever | e887cbc | 2007-10-26 13:32:29 -0400 | [diff] [blame] | 103 | Opt_mountvers, |
Mike Sager | 3fd5be9 | 2009-04-01 09:21:48 -0400 | [diff] [blame] | 104 | Opt_minorversion, |
Chuck Lever | bf0fd76 | 2007-07-01 12:13:44 -0400 | [diff] [blame] | 105 | |
| 106 | /* Mount options that take string arguments */ |
Trond Myklebust | 0d71b05 | 2012-03-02 13:59:49 -0500 | [diff] [blame] | 107 | Opt_nfsvers, |
Chuck Lever | 3383203 | 2007-12-10 14:59:13 -0500 | [diff] [blame] | 108 | Opt_sec, Opt_proto, Opt_mountproto, Opt_mounthost, |
Chuck Lever | 0ac8377 | 2007-09-11 18:01:04 -0400 | [diff] [blame] | 109 | Opt_addr, Opt_mountaddr, Opt_clientaddr, |
Trond Myklebust | 7973c1f1 | 2008-07-15 17:58:14 -0400 | [diff] [blame] | 110 | Opt_lookupcache, |
David Howells | b797cac | 2009-04-03 16:42:48 +0100 | [diff] [blame] | 111 | Opt_fscache_uniq, |
Suresh Jayaraman | 5eebde2 | 2010-09-23 08:55:58 -0400 | [diff] [blame] | 112 | Opt_local_lock, |
Chuck Lever | bf0fd76 | 2007-07-01 12:13:44 -0400 | [diff] [blame] | 113 | |
Chuck Lever | f45663c | 2008-06-24 19:28:02 -0400 | [diff] [blame] | 114 | /* Special mount options */ |
| 115 | Opt_userspace, Opt_deprecated, Opt_sloppy, |
Chuck Lever | bf0fd76 | 2007-07-01 12:13:44 -0400 | [diff] [blame] | 116 | |
| 117 | Opt_err |
| 118 | }; |
| 119 | |
Steven Whitehouse | a447c09 | 2008-10-13 10:46:57 +0100 | [diff] [blame] | 120 | static const match_table_t nfs_mount_option_tokens = { |
Chuck Lever | bf0fd76 | 2007-07-01 12:13:44 -0400 | [diff] [blame] | 121 | { Opt_userspace, "bg" }, |
| 122 | { Opt_userspace, "fg" }, |
Chuck Lever | ecbb384 | 2008-06-12 12:37:33 -0400 | [diff] [blame] | 123 | { Opt_userspace, "retry=%s" }, |
| 124 | |
Chuck Lever | f45663c | 2008-06-24 19:28:02 -0400 | [diff] [blame] | 125 | { Opt_sloppy, "sloppy" }, |
| 126 | |
Chuck Lever | bf0fd76 | 2007-07-01 12:13:44 -0400 | [diff] [blame] | 127 | { Opt_soft, "soft" }, |
| 128 | { Opt_hard, "hard" }, |
Chuck Lever | d33e4df | 2008-06-12 12:37:41 -0400 | [diff] [blame] | 129 | { Opt_deprecated, "intr" }, |
| 130 | { Opt_deprecated, "nointr" }, |
Chuck Lever | bf0fd76 | 2007-07-01 12:13:44 -0400 | [diff] [blame] | 131 | { 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 Lever | bf0fd76 | 2007-07-01 12:13:44 -0400 | [diff] [blame] | 139 | { Opt_udp, "udp" }, |
| 140 | { Opt_tcp, "tcp" }, |
\"Talpey, Thomas\ | 2cf7ff7 | 2007-09-10 13:49:41 -0400 | [diff] [blame] | 141 | { Opt_rdma, "rdma" }, |
Chuck Lever | bf0fd76 | 2007-07-01 12:13:44 -0400 | [diff] [blame] | 142 | { Opt_acl, "acl" }, |
| 143 | { Opt_noacl, "noacl" }, |
| 144 | { Opt_rdirplus, "rdirplus" }, |
| 145 | { Opt_nordirplus, "nordirplus" }, |
Trond Myklebust | 75180df | 2007-05-16 16:53:28 -0400 | [diff] [blame] | 146 | { Opt_sharecache, "sharecache" }, |
| 147 | { Opt_nosharecache, "nosharecache" }, |
Chuck Lever | d740351 | 2008-12-23 15:21:37 -0500 | [diff] [blame] | 148 | { Opt_resvport, "resvport" }, |
| 149 | { Opt_noresvport, "noresvport" }, |
David Howells | b797cac | 2009-04-03 16:42:48 +0100 | [diff] [blame] | 150 | { Opt_fscache, "fsc" }, |
David Howells | b797cac | 2009-04-03 16:42:48 +0100 | [diff] [blame] | 151 | { Opt_nofscache, "nofsc" }, |
Chuck Lever | 8965261 | 2012-09-14 17:24:11 -0400 | [diff] [blame] | 152 | { Opt_migration, "migration" }, |
| 153 | { Opt_nomigration, "nomigration" }, |
Chuck Lever | bf0fd76 | 2007-07-01 12:13:44 -0400 | [diff] [blame] | 154 | |
Chuck Lever | a5a16ba | 2009-06-17 18:02:14 -0700 | [diff] [blame] | 155 | { 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 Myklebust | 0d71b05 | 2012-03-02 13:59:49 -0500 | [diff] [blame] | 169 | { Opt_minorversion, "minorversion=%s" }, |
| 170 | |
Chuck Lever | a5a16ba | 2009-06-17 18:02:14 -0700 | [diff] [blame] | 171 | { Opt_nfsvers, "nfsvers=%s" }, |
| 172 | { Opt_nfsvers, "vers=%s" }, |
Chuck Lever | bf0fd76 | 2007-07-01 12:13:44 -0400 | [diff] [blame] | 173 | |
| 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 Lever | 3383203 | 2007-12-10 14:59:13 -0500 | [diff] [blame] | 179 | { Opt_mounthost, "mounthost=%s" }, |
Chuck Lever | 0ac8377 | 2007-09-11 18:01:04 -0400 | [diff] [blame] | 180 | { Opt_mountaddr, "mountaddr=%s" }, |
Chuck Lever | bf0fd76 | 2007-07-01 12:13:44 -0400 | [diff] [blame] | 181 | |
Trond Myklebust | 7973c1f1 | 2008-07-15 17:58:14 -0400 | [diff] [blame] | 182 | { Opt_lookupcache, "lookupcache=%s" }, |
Chuck Lever | a6d5ff6 | 2010-05-07 13:33:58 -0400 | [diff] [blame] | 183 | { Opt_fscache_uniq, "fsc=%s" }, |
Suresh Jayaraman | 5eebde2 | 2010-09-23 08:55:58 -0400 | [diff] [blame] | 184 | { Opt_local_lock, "local_lock=%s" }, |
Trond Myklebust | 7973c1f1 | 2008-07-15 17:58:14 -0400 | [diff] [blame] | 185 | |
Trond Myklebust | 3862279 | 2012-03-02 14:06:39 -0500 | [diff] [blame] | 186 | /* The following needs to be listed after all other options */ |
| 187 | { Opt_nfsvers, "v%s" }, |
| 188 | |
Chuck Lever | bf0fd76 | 2007-07-01 12:13:44 -0400 | [diff] [blame] | 189 | { Opt_err, NULL } |
| 190 | }; |
| 191 | |
| 192 | enum { |
Jeff Layton | ee671b0 | 2009-12-03 15:58:56 -0500 | [diff] [blame] | 193 | Opt_xprt_udp, Opt_xprt_udp6, Opt_xprt_tcp, Opt_xprt_tcp6, Opt_xprt_rdma, |
Chuck Lever | bf0fd76 | 2007-07-01 12:13:44 -0400 | [diff] [blame] | 194 | |
| 195 | Opt_xprt_err |
| 196 | }; |
| 197 | |
Steven Whitehouse | a447c09 | 2008-10-13 10:46:57 +0100 | [diff] [blame] | 198 | static const match_table_t nfs_xprt_protocol_tokens = { |
Chuck Lever | bf0fd76 | 2007-07-01 12:13:44 -0400 | [diff] [blame] | 199 | { Opt_xprt_udp, "udp" }, |
Jeff Layton | ee671b0 | 2009-12-03 15:58:56 -0500 | [diff] [blame] | 200 | { Opt_xprt_udp6, "udp6" }, |
Chuck Lever | bf0fd76 | 2007-07-01 12:13:44 -0400 | [diff] [blame] | 201 | { Opt_xprt_tcp, "tcp" }, |
Jeff Layton | ee671b0 | 2009-12-03 15:58:56 -0500 | [diff] [blame] | 202 | { Opt_xprt_tcp6, "tcp6" }, |
\"Talpey, Thomas\ | 2cf7ff7 | 2007-09-10 13:49:41 -0400 | [diff] [blame] | 203 | { Opt_xprt_rdma, "rdma" }, |
Chuck Lever | bf0fd76 | 2007-07-01 12:13:44 -0400 | [diff] [blame] | 204 | |
| 205 | { Opt_xprt_err, NULL } |
| 206 | }; |
| 207 | |
| 208 | enum { |
| 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 Whitehouse | a447c09 | 2008-10-13 10:46:57 +0100 | [diff] [blame] | 217 | static const match_table_t nfs_secflavor_tokens = { |
Chuck Lever | bf0fd76 | 2007-07-01 12:13:44 -0400 | [diff] [blame] | 218 | { 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 Kornievskaia | 8d04221 | 2008-02-13 16:47:06 -0500 | [diff] [blame] | 230 | { Opt_sec_spkm, "spkm3" }, |
| 231 | { Opt_sec_spkmi, "spkm3i" }, |
| 232 | { Opt_sec_spkmp, "spkm3p" }, |
| 233 | |
Chuck Lever | bf0fd76 | 2007-07-01 12:13:44 -0400 | [diff] [blame] | 234 | { Opt_sec_err, NULL } |
| 235 | }; |
| 236 | |
Trond Myklebust | 7973c1f1 | 2008-07-15 17:58:14 -0400 | [diff] [blame] | 237 | enum { |
| 238 | Opt_lookupcache_all, Opt_lookupcache_positive, |
| 239 | Opt_lookupcache_none, |
| 240 | |
| 241 | Opt_lookupcache_err |
| 242 | }; |
| 243 | |
| 244 | static 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 Jayaraman | 5eebde2 | 2010-09-23 08:55:58 -0400 | [diff] [blame] | 253 | enum { |
| 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 | |
| 260 | static 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 Myklebust | 0d71b05 | 2012-03-02 13:59:49 -0500 | [diff] [blame] | 269 | enum { |
| 270 | Opt_vers_2, Opt_vers_3, Opt_vers_4, Opt_vers_4_0, |
Steve Dickson | 42c2c42 | 2013-05-22 12:50:38 -0400 | [diff] [blame] | 271 | Opt_vers_4_1, Opt_vers_4_2, |
Trond Myklebust | 0d71b05 | 2012-03-02 13:59:49 -0500 | [diff] [blame] | 272 | |
| 273 | Opt_vers_err |
| 274 | }; |
| 275 | |
| 276 | static 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 Dickson | 42c2c42 | 2013-05-22 12:50:38 -0400 | [diff] [blame] | 282 | { Opt_vers_4_2, "4.2" }, |
Trond Myklebust | 0d71b05 | 2012-03-02 13:59:49 -0500 | [diff] [blame] | 283 | |
| 284 | { Opt_vers_err, NULL } |
| 285 | }; |
Chuck Lever | bf0fd76 | 2007-07-01 12:13:44 -0400 | [diff] [blame] | 286 | |
Al Viro | 31f4347 | 2010-10-29 03:38:12 -0400 | [diff] [blame] | 287 | static struct dentry *nfs_xdev_mount(struct file_system_type *fs_type, |
| 288 | int flags, const char *dev_name, void *raw_data); |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 289 | |
Bryan Schumaker | ab7017a | 2012-07-30 16:05:16 -0400 | [diff] [blame] | 290 | struct file_system_type nfs_fs_type = { |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 291 | .owner = THIS_MODULE, |
| 292 | .name = "nfs", |
Al Viro | 0119498 | 2011-03-16 07:25:36 -0400 | [diff] [blame] | 293 | .mount = nfs_fs_mount, |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 294 | .kill_sb = nfs_kill_super, |
Jeff Layton | ecf3d1f | 2013-02-20 11:19:05 -0500 | [diff] [blame] | 295 | .fs_flags = FS_RENAME_DOES_D_MOVE|FS_BINARY_MOUNTDATA, |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 296 | }; |
Eric W. Biederman | 7f78e03 | 2013-03-02 19:39:14 -0800 | [diff] [blame] | 297 | MODULE_ALIAS_FS("nfs"); |
Bryan Schumaker | ddda8e0 | 2012-07-30 16:05:23 -0400 | [diff] [blame] | 298 | EXPORT_SYMBOL_GPL(nfs_fs_type); |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 299 | |
David Howells | 54ceac4 | 2006-08-22 20:06:13 -0400 | [diff] [blame] | 300 | struct file_system_type nfs_xdev_fs_type = { |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 301 | .owner = THIS_MODULE, |
| 302 | .name = "nfs", |
Al Viro | 31f4347 | 2010-10-29 03:38:12 -0400 | [diff] [blame] | 303 | .mount = nfs_xdev_mount, |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 304 | .kill_sb = nfs_kill_super, |
Jeff Layton | ecf3d1f | 2013-02-20 11:19:05 -0500 | [diff] [blame] | 305 | .fs_flags = FS_RENAME_DOES_D_MOVE|FS_BINARY_MOUNTDATA, |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 306 | }; |
| 307 | |
Bryan Schumaker | 6a74490 | 2012-07-30 16:05:20 -0400 | [diff] [blame] | 308 | const struct super_operations nfs_sops = { |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 309 | .alloc_inode = nfs_alloc_inode, |
| 310 | .destroy_inode = nfs_destroy_inode, |
| 311 | .write_inode = nfs_write_inode, |
Trond Myklebust | eed9935 | 2012-12-14 14:36:36 -0500 | [diff] [blame] | 312 | .drop_inode = nfs_drop_inode, |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 313 | .statfs = nfs_statfs, |
Al Viro | b57922d | 2010-06-07 14:34:48 -0400 | [diff] [blame] | 314 | .evict_inode = nfs_evict_inode, |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 315 | .umount_begin = nfs_umount_begin, |
| 316 | .show_options = nfs_show_options, |
Al Viro | c7f404b | 2011-03-16 06:59:40 -0400 | [diff] [blame] | 317 | .show_devname = nfs_show_devname, |
| 318 | .show_path = nfs_show_path, |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 319 | .show_stats = nfs_show_stats, |
Jeff Layton | 48b605f | 2008-06-10 15:38:39 -0400 | [diff] [blame] | 320 | .remount_fs = nfs_remount, |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 321 | }; |
Bryan Schumaker | ddda8e0 | 2012-07-30 16:05:23 -0400 | [diff] [blame] | 322 | EXPORT_SYMBOL_GPL(nfs_sops); |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 323 | |
Bryan Schumaker | 89d77c8 | 2012-07-30 16:05:25 -0400 | [diff] [blame] | 324 | #if IS_ENABLED(CONFIG_NFS_V4) |
Bryan Schumaker | b72e4f4 | 2012-05-10 15:07:40 -0400 | [diff] [blame] | 325 | static void nfs4_validate_mount_flags(struct nfs_parsed_mount_data *); |
Bryan Schumaker | d72c727 | 2012-05-10 15:07:41 -0400 | [diff] [blame] | 326 | static int nfs4_validate_mount_data(void *options, |
| 327 | struct nfs_parsed_mount_data *args, const char *dev_name); |
bjschuma@gmail.com | 1ae811e | 2012-08-08 13:57:06 -0400 | [diff] [blame] | 328 | |
| 329 | struct 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 Layton | ecf3d1f | 2013-02-20 11:19:05 -0500 | [diff] [blame] | 334 | .fs_flags = FS_RENAME_DOES_D_MOVE|FS_BINARY_MOUNTDATA, |
bjschuma@gmail.com | 1ae811e | 2012-08-08 13:57:06 -0400 | [diff] [blame] | 335 | }; |
Eric W. Biederman | 7f78e03 | 2013-03-02 19:39:14 -0800 | [diff] [blame] | 336 | MODULE_ALIAS_FS("nfs4"); |
Eric W. Biederman | fa7614dd | 2013-03-12 18:27:41 -0700 | [diff] [blame] | 337 | MODULE_ALIAS("nfs4"); |
bjschuma@gmail.com | 1ae811e | 2012-08-08 13:57:06 -0400 | [diff] [blame] | 338 | EXPORT_SYMBOL_GPL(nfs4_fs_type); |
| 339 | |
| 340 | static int __init register_nfs4_fs(void) |
| 341 | { |
| 342 | return register_filesystem(&nfs4_fs_type); |
| 343 | } |
| 344 | |
| 345 | static void unregister_nfs4_fs(void) |
| 346 | { |
| 347 | unregister_filesystem(&nfs4_fs_type); |
| 348 | } |
| 349 | #else |
| 350 | static int __init register_nfs4_fs(void) |
| 351 | { |
| 352 | return 0; |
| 353 | } |
| 354 | |
| 355 | static void unregister_nfs4_fs(void) |
| 356 | { |
| 357 | } |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 358 | #endif |
| 359 | |
Rusty Russell | 8e1f936 | 2007-07-17 04:03:17 -0700 | [diff] [blame] | 360 | static struct shrinker acl_shrinker = { |
Dave Chinner | 1ab6c49 | 2013-08-28 10:18:09 +1000 | [diff] [blame] | 361 | .count_objects = nfs_access_cache_count, |
| 362 | .scan_objects = nfs_access_cache_scan, |
Rusty Russell | 8e1f936 | 2007-07-17 04:03:17 -0700 | [diff] [blame] | 363 | .seeks = DEFAULT_SEEKS, |
| 364 | }; |
Trond Myklebust | 979df72 | 2006-07-25 11:28:19 -0400 | [diff] [blame] | 365 | |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 366 | /* |
| 367 | * Register the NFS filesystems |
| 368 | */ |
| 369 | int __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.com | 1ae811e | 2012-08-08 13:57:06 -0400 | [diff] [blame] | 377 | ret = register_nfs4_fs(); |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 378 | if (ret < 0) |
| 379 | goto error_1; |
bjschuma@gmail.com | 1ae811e | 2012-08-08 13:57:06 -0400 | [diff] [blame] | 380 | |
| 381 | ret = nfs_register_sysctl(); |
| 382 | if (ret < 0) |
| 383 | goto error_2; |
Kinglong Mee | 5ef8d79 | 2015-07-30 21:41:08 +0800 | [diff] [blame] | 384 | ret = register_shrinker(&acl_shrinker); |
| 385 | if (ret < 0) |
| 386 | goto error_3; |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 387 | return 0; |
Kinglong Mee | 5ef8d79 | 2015-07-30 21:41:08 +0800 | [diff] [blame] | 388 | error_3: |
| 389 | nfs_unregister_sysctl(); |
bjschuma@gmail.com | 1ae811e | 2012-08-08 13:57:06 -0400 | [diff] [blame] | 390 | error_2: |
| 391 | unregister_nfs4_fs(); |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 392 | error_1: |
| 393 | unregister_filesystem(&nfs_fs_type); |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 394 | error_0: |
| 395 | return ret; |
| 396 | } |
| 397 | |
| 398 | /* |
| 399 | * Unregister the NFS filesystems |
| 400 | */ |
| 401 | void __exit unregister_nfs_fs(void) |
| 402 | { |
Rusty Russell | 8e1f936 | 2007-07-17 04:03:17 -0700 | [diff] [blame] | 403 | unregister_shrinker(&acl_shrinker); |
Alexey Dobriyan | 49af7ee | 2007-09-18 22:46:40 -0700 | [diff] [blame] | 404 | nfs_unregister_sysctl(); |
bjschuma@gmail.com | 1ae811e | 2012-08-08 13:57:06 -0400 | [diff] [blame] | 405 | unregister_nfs4_fs(); |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 406 | unregister_filesystem(&nfs_fs_type); |
| 407 | } |
| 408 | |
Trond Myklebust | ea7c38f | 2015-02-05 15:13:24 -0500 | [diff] [blame] | 409 | bool nfs_sb_active(struct super_block *sb) |
Steve Dickson | ef818a2 | 2007-11-08 04:05:04 -0500 | [diff] [blame] | 410 | { |
| 411 | struct nfs_server *server = NFS_SB(sb); |
Trond Myklebust | 1daef0a | 2008-07-27 18:19:01 -0400 | [diff] [blame] | 412 | |
Trond Myklebust | ea7c38f | 2015-02-05 15:13:24 -0500 | [diff] [blame] | 413 | 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 Myklebust | 1daef0a | 2008-07-27 18:19:01 -0400 | [diff] [blame] | 418 | } |
Bryan Schumaker | 89d77c8 | 2012-07-30 16:05:25 -0400 | [diff] [blame] | 419 | EXPORT_SYMBOL_GPL(nfs_sb_active); |
Trond Myklebust | 1daef0a | 2008-07-27 18:19:01 -0400 | [diff] [blame] | 420 | |
| 421 | void 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 Dickson | ef818a2 | 2007-11-08 04:05:04 -0500 | [diff] [blame] | 427 | } |
Bryan Schumaker | 89d77c8 | 2012-07-30 16:05:25 -0400 | [diff] [blame] | 428 | EXPORT_SYMBOL_GPL(nfs_sb_deactive); |
Steve Dickson | ef818a2 | 2007-11-08 04:05:04 -0500 | [diff] [blame] | 429 | |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 430 | /* |
| 431 | * Deliver file system statistics to userspace |
| 432 | */ |
Bryan Schumaker | fbdefd6 | 2012-07-16 16:39:20 -0400 | [diff] [blame] | 433 | int nfs_statfs(struct dentry *dentry, struct kstatfs *buf) |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 434 | { |
David Howells | 0c7d90c | 2006-08-22 20:06:10 -0400 | [diff] [blame] | 435 | struct nfs_server *server = NFS_SB(dentry->d_sb); |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 436 | unsigned char blockbits; |
| 437 | unsigned long blockres; |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 438 | struct nfs_fh *fh = NFS_FH(d_inode(dentry)); |
Trond Myklebust | ca7e9a0 | 2010-04-16 16:22:52 -0400 | [diff] [blame] | 439 | 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 Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 445 | |
David Howells | 8fa5c00 | 2006-08-22 20:06:12 -0400 | [diff] [blame] | 446 | error = server->nfs_client->rpc_ops->statfs(server, fh, &res); |
Menyhart Zoltan | fbf3fdd | 2010-09-12 19:55:26 -0400 | [diff] [blame] | 447 | if (unlikely(error == -ESTALE)) { |
| 448 | struct dentry *pd_dentry; |
Trond Myklebust | ca7e9a0 | 2010-04-16 16:22:52 -0400 | [diff] [blame] | 449 | |
Menyhart Zoltan | fbf3fdd | 2010-09-12 19:55:26 -0400 | [diff] [blame] | 450 | pd_dentry = dget_parent(dentry); |
| 451 | if (pd_dentry != NULL) { |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 452 | nfs_zap_caches(d_inode(pd_dentry)); |
Menyhart Zoltan | fbf3fdd | 2010-09-12 19:55:26 -0400 | [diff] [blame] | 453 | dput(pd_dentry); |
| 454 | } |
| 455 | } |
Trond Myklebust | ca7e9a0 | 2010-04-16 16:22:52 -0400 | [diff] [blame] | 456 | nfs_free_fattr(res.fattr); |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 457 | if (error < 0) |
| 458 | goto out_err; |
Trond Myklebust | ca7e9a0 | 2010-04-16 16:22:52 -0400 | [diff] [blame] | 459 | |
Amnon Aaronsohn | 1a0ba9a | 2007-04-09 22:05:26 -0700 | [diff] [blame] | 460 | buf->f_type = NFS_SUPER_MAGIC; |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 461 | |
| 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 Howells | 0c7d90c | 2006-08-22 20:06:10 -0400 | [diff] [blame] | 467 | buf->f_frsize = dentry->d_sb->s_blocksize; |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 468 | |
| 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 Howells | 0c7d90c | 2006-08-22 20:06:10 -0400 | [diff] [blame] | 476 | buf->f_bsize = dentry->d_sb->s_blocksize; |
| 477 | blockbits = dentry->d_sb->s_blocksize_bits; |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 478 | 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 Aaronsohn | 1a0ba9a | 2007-04-09 22:05:26 -0700 | [diff] [blame] | 487 | |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 488 | return 0; |
| 489 | |
| 490 | out_err: |
Harvey Harrison | 3110ff8 | 2008-05-02 13:42:44 -0700 | [diff] [blame] | 491 | dprintk("%s: statfs error = %d\n", __func__, -error); |
Amnon Aaronsohn | 1a0ba9a | 2007-04-09 22:05:26 -0700 | [diff] [blame] | 492 | return error; |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 493 | } |
Bryan Schumaker | 89d77c8 | 2012-07-30 16:05:25 -0400 | [diff] [blame] | 494 | EXPORT_SYMBOL_GPL(nfs_statfs); |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 495 | |
David Howells | 7d4e274 | 2006-08-22 20:06:07 -0400 | [diff] [blame] | 496 | /* |
| 497 | * Map the security flavour number to a name |
| 498 | */ |
Trond Myklebust | 81039f1 | 2006-06-09 09:34:34 -0400 | [diff] [blame] | 499 | static const char *nfs_pseudoflavour_to_name(rpc_authflavor_t flavour) |
| 500 | { |
David Howells | 7d4e274 | 2006-08-22 20:06:07 -0400 | [diff] [blame] | 501 | static const struct { |
Trond Myklebust | 81039f1 | 2006-06-09 09:34:34 -0400 | [diff] [blame] | 502 | rpc_authflavor_t flavour; |
| 503 | const char *str; |
Weston Andros Adamson | 4d4b69d | 2013-10-18 15:15:19 -0400 | [diff] [blame] | 504 | } sec_flavours[NFS_AUTH_INFO_MAX_FLAVORS] = { |
| 505 | /* update NFS_AUTH_INFO_MAX_FLAVORS when this list changes! */ |
Trond Myklebust | 81039f1 | 2006-06-09 09:34:34 -0400 | [diff] [blame] | 506 | { 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 Lever | 4d81cd1 | 2007-07-01 12:12:40 -0400 | [diff] [blame] | 517 | { UINT_MAX, "unknown" } |
Trond Myklebust | 81039f1 | 2006-06-09 09:34:34 -0400 | [diff] [blame] | 518 | }; |
| 519 | int i; |
| 520 | |
Chuck Lever | 4d81cd1 | 2007-07-01 12:12:40 -0400 | [diff] [blame] | 521 | for (i = 0; sec_flavours[i].flavour != UINT_MAX; i++) { |
Trond Myklebust | 81039f1 | 2006-06-09 09:34:34 -0400 | [diff] [blame] | 522 | if (sec_flavours[i].flavour == flavour) |
| 523 | break; |
| 524 | } |
| 525 | return sec_flavours[i].str; |
| 526 | } |
| 527 | |
Jeff Layton | ee671b0 | 2009-12-03 15:58:56 -0500 | [diff] [blame] | 528 | static 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 Lever | 82d101d | 2008-03-14 14:10:37 -0400 | [diff] [blame] | 567 | static 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 Schumaker | d5eff1a | 2010-08-03 13:04:00 -0400 | [diff] [blame] | 572 | if (nfss->flags & NFS_MOUNT_LEGACY_INTERFACE) |
| 573 | return; |
| 574 | |
Chuck Lever | 82d101d | 2008-03-14 14:10:37 -0400 | [diff] [blame] | 575 | switch (sap->sa_family) { |
| 576 | case AF_INET: { |
| 577 | struct sockaddr_in *sin = (struct sockaddr_in *)sap; |
Harvey Harrison | be85940 | 2008-10-31 00:56:28 -0700 | [diff] [blame] | 578 | seq_printf(m, ",mountaddr=%pI4", &sin->sin_addr.s_addr); |
Chuck Lever | 82d101d | 2008-03-14 14:10:37 -0400 | [diff] [blame] | 579 | break; |
| 580 | } |
| 581 | case AF_INET6: { |
| 582 | struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sap; |
Chuck Lever | d250e19 | 2009-12-03 15:58:56 -0500 | [diff] [blame] | 583 | seq_printf(m, ",mountaddr=%pI6c", &sin6->sin6_addr); |
Chuck Lever | 82d101d | 2008-03-14 14:10:37 -0400 | [diff] [blame] | 584 | 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 Kinsbursky | aa69947 | 2010-12-08 12:40:13 +0300 | [diff] [blame] | 593 | if ((nfss->mountd_port && |
| 594 | nfss->mountd_port != (unsigned short)NFS_UNSPEC_PORT) || |
| 595 | showdefaults) |
Chuck Lever | 82d101d | 2008-03-14 14:10:37 -0400 | [diff] [blame] | 596 | seq_printf(m, ",mountport=%u", nfss->mountd_port); |
| 597 | |
Jeff Layton | ee671b0 | 2009-12-03 15:58:56 -0500 | [diff] [blame] | 598 | nfs_show_mountd_netid(m, nfss, showdefaults); |
Chuck Lever | 82d101d | 2008-03-14 14:10:37 -0400 | [diff] [blame] | 599 | } |
| 600 | |
Bryan Schumaker | 89d77c8 | 2012-07-30 16:05:25 -0400 | [diff] [blame] | 601 | #if IS_ENABLED(CONFIG_NFS_V4) |
Trond Myklebust | 0be8189 | 2010-06-18 12:23:58 -0400 | [diff] [blame] | 602 | static 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 Myklebust | 0be8189 | 2010-06-18 12:23:58 -0400 | [diff] [blame] | 608 | } |
| 609 | #else |
| 610 | static void nfs_show_nfsv4_options(struct seq_file *m, struct nfs_server *nfss, |
| 611 | int showdefaults) |
| 612 | { |
| 613 | } |
| 614 | #endif |
| 615 | |
Trond Myklebust | 7bbceb6 | 2012-03-02 14:00:20 -0500 | [diff] [blame] | 616 | static 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 Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 625 | /* |
| 626 | * Describe the mount options in force on this server representation |
| 627 | */ |
Chuck Lever | 82d101d | 2008-03-14 14:10:37 -0400 | [diff] [blame] | 628 | static void nfs_show_mount_options(struct seq_file *m, struct nfs_server *nfss, |
| 629 | int showdefaults) |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 630 | { |
David Howells | 509de81 | 2006-08-22 20:06:11 -0400 | [diff] [blame] | 631 | static const struct proc_nfs_info { |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 632 | int flag; |
David Howells | 509de81 | 2006-08-22 20:06:11 -0400 | [diff] [blame] | 633 | const char *str; |
| 634 | const char *nostr; |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 635 | } nfs_info[] = { |
| 636 | { NFS_MOUNT_SOFT, ",soft", ",hard" }, |
Chuck Lever | 82d101d | 2008-03-14 14:10:37 -0400 | [diff] [blame] | 637 | { NFS_MOUNT_POSIX, ",posix", "" }, |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 638 | { NFS_MOUNT_NOCTO, ",nocto", "" }, |
| 639 | { NFS_MOUNT_NOAC, ",noac", "" }, |
| 640 | { NFS_MOUNT_NONLM, ",nolock", "" }, |
| 641 | { NFS_MOUNT_NOACL, ",noacl", "" }, |
Steve Dickson | 74dd34e | 2007-04-14 17:01:15 -0400 | [diff] [blame] | 642 | { NFS_MOUNT_NORDIRPLUS, ",nordirplus", "" }, |
Chuck Lever | d740351 | 2008-12-23 15:21:37 -0500 | [diff] [blame] | 643 | { NFS_MOUNT_UNSHARED, ",nosharecache", "" }, |
| 644 | { NFS_MOUNT_NORESVPORT, ",noresvport", "" }, |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 645 | { 0, NULL, NULL } |
| 646 | }; |
David Howells | 509de81 | 2006-08-22 20:06:11 -0400 | [diff] [blame] | 647 | const struct proc_nfs_info *nfs_infop; |
David Howells | 8fa5c00 | 2006-08-22 20:06:12 -0400 | [diff] [blame] | 648 | struct nfs_client *clp = nfss->nfs_client; |
Chuck Lever | 82d101d | 2008-03-14 14:10:37 -0400 | [diff] [blame] | 649 | u32 version = clp->rpc_ops->version; |
Suresh Jayaraman | 7c563cc | 2010-09-23 14:26:48 -0400 | [diff] [blame] | 650 | int local_flock, local_fcntl; |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 651 | |
Trond Myklebust | 7bbceb6 | 2012-03-02 14:00:20 -0500 | [diff] [blame] | 652 | nfs_show_nfs_version(m, version, clp->cl_minorversion); |
Chuck Lever | 2d76743 | 2008-03-14 14:10:08 -0400 | [diff] [blame] | 653 | seq_printf(m, ",rsize=%u", nfss->rsize); |
| 654 | seq_printf(m, ",wsize=%u", nfss->wsize); |
Chuck Lever | 82d101d | 2008-03-14 14:10:37 -0400 | [diff] [blame] | 655 | if (nfss->bsize != 0) |
| 656 | seq_printf(m, ",bsize=%u", nfss->bsize); |
| 657 | seq_printf(m, ",namlen=%u", nfss->namelen); |
Chuck Lever | 0e0cab7 | 2008-06-26 17:47:12 -0400 | [diff] [blame] | 658 | if (nfss->acregmin != NFS_DEF_ACREGMIN*HZ || showdefaults) |
Chuck Lever | 2d76743 | 2008-03-14 14:10:08 -0400 | [diff] [blame] | 659 | seq_printf(m, ",acregmin=%u", nfss->acregmin/HZ); |
Chuck Lever | 0e0cab7 | 2008-06-26 17:47:12 -0400 | [diff] [blame] | 660 | if (nfss->acregmax != NFS_DEF_ACREGMAX*HZ || showdefaults) |
Chuck Lever | 2d76743 | 2008-03-14 14:10:08 -0400 | [diff] [blame] | 661 | seq_printf(m, ",acregmax=%u", nfss->acregmax/HZ); |
Chuck Lever | 0e0cab7 | 2008-06-26 17:47:12 -0400 | [diff] [blame] | 662 | if (nfss->acdirmin != NFS_DEF_ACDIRMIN*HZ || showdefaults) |
Chuck Lever | 2d76743 | 2008-03-14 14:10:08 -0400 | [diff] [blame] | 663 | seq_printf(m, ",acdirmin=%u", nfss->acdirmin/HZ); |
Chuck Lever | 0e0cab7 | 2008-06-26 17:47:12 -0400 | [diff] [blame] | 664 | if (nfss->acdirmax != NFS_DEF_ACDIRMAX*HZ || showdefaults) |
Chuck Lever | 2d76743 | 2008-03-14 14:10:08 -0400 | [diff] [blame] | 665 | seq_printf(m, ",acdirmax=%u", nfss->acdirmax/HZ); |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 666 | 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 Myklebust | 2446ab6 | 2012-03-01 17:00:56 -0500 | [diff] [blame] | 672 | rcu_read_lock(); |
\"Talpey, Thomas\ | 56928ed | 2007-09-10 13:48:47 -0400 | [diff] [blame] | 673 | seq_printf(m, ",proto=%s", |
Jeff Layton | ee671b0 | 2009-12-03 15:58:56 -0500 | [diff] [blame] | 674 | rpc_peeraddr2str(nfss->client, RPC_DISPLAY_NETID)); |
Trond Myklebust | 2446ab6 | 2012-03-01 17:00:56 -0500 | [diff] [blame] | 675 | rcu_read_unlock(); |
Chuck Lever | 82d101d | 2008-03-14 14:10:37 -0400 | [diff] [blame] | 676 | 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 Myklebust | 3317023 | 2007-12-20 16:03:59 -0500 | [diff] [blame] | 683 | 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 Myklebust | 81039f1 | 2006-06-09 09:34:34 -0400 | [diff] [blame] | 685 | seq_printf(m, ",sec=%s", nfs_pseudoflavour_to_name(nfss->client->cl_auth->au_flavor)); |
Chuck Lever | 82d101d | 2008-03-14 14:10:37 -0400 | [diff] [blame] | 686 | |
| 687 | if (version != 4) |
| 688 | nfs_show_mountd_options(m, nfss, showdefaults); |
Trond Myklebust | 0be8189 | 2010-06-18 12:23:58 -0400 | [diff] [blame] | 689 | else |
| 690 | nfs_show_nfsv4_options(m, nfss, showdefaults); |
Chuck Lever | 82d101d | 2008-03-14 14:10:37 -0400 | [diff] [blame] | 691 | |
David Howells | b797cac | 2009-04-03 16:42:48 +0100 | [diff] [blame] | 692 | if (nfss->options & NFS_OPTION_FSCACHE) |
| 693 | seq_printf(m, ",fsc"); |
Patrick J. LoPresti | 9b00c64 | 2010-08-10 17:28:01 -0400 | [diff] [blame] | 694 | |
Chuck Lever | 8965261 | 2012-09-14 17:24:11 -0400 | [diff] [blame] | 695 | if (nfss->options & NFS_OPTION_MIGRATION) |
| 696 | seq_printf(m, ",migration"); |
| 697 | |
Patrick J. LoPresti | 9b00c64 | 2010-08-10 17:28:01 -0400 | [diff] [blame] | 698 | 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 Jayaraman | 7c563cc | 2010-09-23 14:26:48 -0400 | [diff] [blame] | 704 | |
| 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 Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 716 | } |
| 717 | |
| 718 | /* |
| 719 | * Describe the mount options on this VFS mountpoint |
| 720 | */ |
Bryan Schumaker | fbdefd6 | 2012-07-16 16:39:20 -0400 | [diff] [blame] | 721 | int nfs_show_options(struct seq_file *m, struct dentry *root) |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 722 | { |
Al Viro | 34c80b1 | 2011-12-08 21:32:45 -0500 | [diff] [blame] | 723 | struct nfs_server *nfss = NFS_SB(root->d_sb); |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 724 | |
| 725 | nfs_show_mount_options(m, nfss, 0); |
| 726 | |
Trond Myklebust | 2446ab6 | 2012-03-01 17:00:56 -0500 | [diff] [blame] | 727 | rcu_read_lock(); |
Chuck Lever | 5d8515c | 2007-12-10 14:57:16 -0500 | [diff] [blame] | 728 | seq_printf(m, ",addr=%s", |
| 729 | rpc_peeraddr2str(nfss->nfs_client->cl_rpcclient, |
| 730 | RPC_DISPLAY_ADDR)); |
Trond Myklebust | 2446ab6 | 2012-03-01 17:00:56 -0500 | [diff] [blame] | 731 | rcu_read_unlock(); |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 732 | |
| 733 | return 0; |
| 734 | } |
Bryan Schumaker | 89d77c8 | 2012-07-30 16:05:25 -0400 | [diff] [blame] | 735 | EXPORT_SYMBOL_GPL(nfs_show_options); |
H Hartley Sweeten | 45402c38 | 2011-09-02 14:39:12 -0700 | [diff] [blame] | 736 | |
Bryan Schumaker | 89d77c8 | 2012-07-30 16:05:25 -0400 | [diff] [blame] | 737 | #if IS_ENABLED(CONFIG_NFS_V4) |
J. Bruce Fields | ae50c0b | 2011-05-22 19:48:21 +0300 | [diff] [blame] | 738 | #ifdef CONFIG_NFS_V4_1 |
H Hartley Sweeten | 45402c38 | 2011-09-02 14:39:12 -0700 | [diff] [blame] | 739 | static void show_sessions(struct seq_file *m, struct nfs_server *server) |
J. Bruce Fields | ae50c0b | 2011-05-22 19:48:21 +0300 | [diff] [blame] | 740 | { |
| 741 | if (nfs4_has_session(server->nfs_client)) |
| 742 | seq_printf(m, ",sessions"); |
| 743 | } |
| 744 | #else |
H Hartley Sweeten | 45402c38 | 2011-09-02 14:39:12 -0700 | [diff] [blame] | 745 | static void show_sessions(struct seq_file *m, struct nfs_server *server) {} |
| 746 | #endif |
J. Bruce Fields | ae50c0b | 2011-05-22 19:48:21 +0300 | [diff] [blame] | 747 | #endif |
| 748 | |
| 749 | #ifdef CONFIG_NFS_V4_1 |
H Hartley Sweeten | 45402c38 | 2011-09-02 14:39:12 -0700 | [diff] [blame] | 750 | static void show_pnfs(struct seq_file *m, struct nfs_server *server) |
J. Bruce Fields | ae50c0b | 2011-05-22 19:48:21 +0300 | [diff] [blame] | 751 | { |
| 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 Myklebust | 7e03b7c | 2012-03-04 18:12:57 -0500 | [diff] [blame] | 758 | |
| 759 | static void show_implementation_id(struct seq_file *m, struct nfs_server *nfss) |
| 760 | { |
Chuck Lever | 5915554 | 2012-05-21 22:44:41 -0400 | [diff] [blame] | 761 | if (nfss->nfs_client && nfss->nfs_client->cl_implid) { |
| 762 | struct nfs41_impl_id *impl_id = nfss->nfs_client->cl_implid; |
Trond Myklebust | 7e03b7c | 2012-03-04 18:12:57 -0500 | [diff] [blame] | 763 | 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 Sweeten | 45402c38 | 2011-09-02 14:39:12 -0700 | [diff] [blame] | 769 | #else |
Bryan Schumaker | 89d77c8 | 2012-07-30 16:05:25 -0400 | [diff] [blame] | 770 | #if IS_ENABLED(CONFIG_NFS_V4) |
Trond Myklebust | 7e03b7c | 2012-03-04 18:12:57 -0500 | [diff] [blame] | 771 | static void show_pnfs(struct seq_file *m, struct nfs_server *server) |
| 772 | { |
| 773 | } |
H Hartley Sweeten | 45402c38 | 2011-09-02 14:39:12 -0700 | [diff] [blame] | 774 | #endif |
Trond Myklebust | 7e03b7c | 2012-03-04 18:12:57 -0500 | [diff] [blame] | 775 | static void show_implementation_id(struct seq_file *m, struct nfs_server *nfss) |
| 776 | { |
| 777 | } |
H Hartley Sweeten | 45402c38 | 2011-09-02 14:39:12 -0700 | [diff] [blame] | 778 | #endif |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 779 | |
Bryan Schumaker | fbdefd6 | 2012-07-16 16:39:20 -0400 | [diff] [blame] | 780 | int nfs_show_devname(struct seq_file *m, struct dentry *root) |
Al Viro | c7f404b | 2011-03-16 06:59:40 -0400 | [diff] [blame] | 781 | { |
| 782 | char *page = (char *) __get_free_page(GFP_KERNEL); |
| 783 | char *devname, *dummy; |
| 784 | int err = 0; |
| 785 | if (!page) |
| 786 | return -ENOMEM; |
Ben Hutchings | 97a5486 | 2012-10-21 19:23:52 +0100 | [diff] [blame] | 787 | devname = nfs_path(&dummy, root, page, PAGE_SIZE, 0); |
Al Viro | c7f404b | 2011-03-16 06:59:40 -0400 | [diff] [blame] | 788 | 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 Schumaker | 89d77c8 | 2012-07-30 16:05:25 -0400 | [diff] [blame] | 795 | EXPORT_SYMBOL_GPL(nfs_show_devname); |
Al Viro | c7f404b | 2011-03-16 06:59:40 -0400 | [diff] [blame] | 796 | |
Bryan Schumaker | fbdefd6 | 2012-07-16 16:39:20 -0400 | [diff] [blame] | 797 | int nfs_show_path(struct seq_file *m, struct dentry *dentry) |
Al Viro | c7f404b | 2011-03-16 06:59:40 -0400 | [diff] [blame] | 798 | { |
| 799 | seq_puts(m, "/"); |
| 800 | return 0; |
| 801 | } |
Bryan Schumaker | 89d77c8 | 2012-07-30 16:05:25 -0400 | [diff] [blame] | 802 | EXPORT_SYMBOL_GPL(nfs_show_path); |
Al Viro | c7f404b | 2011-03-16 06:59:40 -0400 | [diff] [blame] | 803 | |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 804 | /* |
| 805 | * Present statistical information for this VFS mountpoint |
| 806 | */ |
Bryan Schumaker | fbdefd6 | 2012-07-16 16:39:20 -0400 | [diff] [blame] | 807 | int nfs_show_stats(struct seq_file *m, struct dentry *root) |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 808 | { |
| 809 | int i, cpu; |
Al Viro | 6413237 | 2011-12-08 20:51:13 -0500 | [diff] [blame] | 810 | struct nfs_server *nfss = NFS_SB(root->d_sb); |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 811 | 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 Viro | 6413237 | 2011-12-08 20:51:13 -0500 | [diff] [blame] | 820 | 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 Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 824 | nfs_show_mount_options(m, nfss, 1); |
| 825 | |
| 826 | seq_printf(m, "\n\tage:\t%lu", (jiffies - nfss->mount_time) / HZ); |
| 827 | |
Trond Myklebust | 7e03b7c | 2012-03-04 18:12:57 -0500 | [diff] [blame] | 828 | show_implementation_id(m, nfss); |
Weston Andros Adamson | 7d2ed9a | 2012-02-17 15:20:26 -0500 | [diff] [blame] | 829 | |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 830 | seq_printf(m, "\n\tcaps:\t"); |
| 831 | seq_printf(m, "caps=0x%x", nfss->caps); |
Chuck Lever | 2d76743 | 2008-03-14 14:10:08 -0400 | [diff] [blame] | 832 | 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 Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 836 | |
Bryan Schumaker | 89d77c8 | 2012-07-30 16:05:25 -0400 | [diff] [blame] | 837 | #if IS_ENABLED(CONFIG_NFS_V4) |
Trond Myklebust | 40c55319 | 2007-12-14 14:56:07 -0500 | [diff] [blame] | 838 | if (nfss->nfs_client->rpc_ops->version == 4) { |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 839 | 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 Quigley | a09df2c | 2013-05-22 12:50:41 -0400 | [diff] [blame] | 842 | seq_printf(m, ",bm2=0x%x", nfss->attr_bitmask[2]); |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 843 | seq_printf(m, ",acl=0x%x", nfss->acl_bitmask); |
J. Bruce Fields | ae50c0b | 2011-05-22 19:48:21 +0300 | [diff] [blame] | 844 | show_sessions(m, nfss); |
| 845 | show_pnfs(m, nfss); |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 846 | } |
| 847 | #endif |
| 848 | |
| 849 | /* |
| 850 | * Display security flavor in effect for this mount |
| 851 | */ |
Chuck Lever | 2d76743 | 2008-03-14 14:10:08 -0400 | [diff] [blame] | 852 | seq_printf(m, "\n\tsec:\tflavor=%u", auth->au_ops->au_flavor); |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 853 | if (auth->au_flavor) |
Chuck Lever | 2d76743 | 2008-03-14 14:10:08 -0400 | [diff] [blame] | 854 | seq_printf(m, ",pseudoflavor=%u", auth->au_flavor); |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 855 | |
| 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 Howells | 6a51091 | 2009-04-03 16:42:43 +0100 | [diff] [blame] | 869 | #ifdef CONFIG_NFS_FSCACHE |
| 870 | for (i = 0; i < __NFSIOS_FSCACHEMAX; i++) |
| 871 | totals.fscache[i] += stats->fscache[i]; |
| 872 | #endif |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 873 | |
| 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 Howells | 6a51091 | 2009-04-03 16:42:43 +0100 | [diff] [blame] | 883 | #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 Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 890 | seq_printf(m, "\n"); |
| 891 | |
| 892 | rpc_print_iostats(m, nfss->client); |
| 893 | |
| 894 | return 0; |
| 895 | } |
Bryan Schumaker | 89d77c8 | 2012-07-30 16:05:25 -0400 | [diff] [blame] | 896 | EXPORT_SYMBOL_GPL(nfs_show_stats); |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 897 | |
| 898 | /* |
| 899 | * Begin unmount by attempting to remove all automounted mountpoints we added |
David Howells | 54ceac4 | 2006-08-22 20:06:13 -0400 | [diff] [blame] | 900 | * in response to xdev traversals and referrals |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 901 | */ |
Bryan Schumaker | fbdefd6 | 2012-07-16 16:39:20 -0400 | [diff] [blame] | 902 | void nfs_umount_begin(struct super_block *sb) |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 903 | { |
Alessio Igor Bogani | 67e5520 | 2009-04-24 09:06:53 +0200 | [diff] [blame] | 904 | struct nfs_server *server; |
Trond Myklebust | fc6ae3c | 2007-06-05 19:13:47 -0400 | [diff] [blame] | 905 | struct rpc_clnt *rpc; |
| 906 | |
Alessio Igor Bogani | 67e5520 | 2009-04-24 09:06:53 +0200 | [diff] [blame] | 907 | server = NFS_SB(sb); |
Trond Myklebust | fc6ae3c | 2007-06-05 19:13:47 -0400 | [diff] [blame] | 908 | /* -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 Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 915 | } |
Bryan Schumaker | 89d77c8 | 2012-07-30 16:05:25 -0400 | [diff] [blame] | 916 | EXPORT_SYMBOL_GPL(nfs_umount_begin); |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 917 | |
Bryan Schumaker | db83335 | 2012-05-10 15:07:38 -0400 | [diff] [blame] | 918 | static struct nfs_parsed_mount_data *nfs_alloc_parsed_mount_data(void) |
Chuck Lever | 9423a08 | 2009-09-23 14:36:38 -0400 | [diff] [blame] | 919 | { |
| 920 | struct nfs_parsed_mount_data *data; |
| 921 | |
| 922 | data = kzalloc(sizeof(*data), GFP_KERNEL); |
| 923 | if (data) { |
Chuck Lever | 9423a08 | 2009-09-23 14:36:38 -0400 | [diff] [blame] | 924 | data->acregmin = NFS_DEF_ACREGMIN; |
| 925 | data->acregmax = NFS_DEF_ACREGMAX; |
| 926 | data->acdirmin = NFS_DEF_ACDIRMIN; |
| 927 | data->acdirmax = NFS_DEF_ACDIRMAX; |
Trond Myklebust | c5811db | 2009-10-06 15:40:15 -0400 | [diff] [blame] | 928 | data->mount_server.port = NFS_UNSPEC_PORT; |
Chuck Lever | 9423a08 | 2009-09-23 14:36:38 -0400 | [diff] [blame] | 929 | data->nfs_server.port = NFS_UNSPEC_PORT; |
Trond Myklebust | c5811db | 2009-10-06 15:40:15 -0400 | [diff] [blame] | 930 | data->nfs_server.protocol = XPRT_TRANSPORT_TCP; |
Weston Andros Adamson | a3f73c2 | 2013-10-18 15:15:16 -0400 | [diff] [blame] | 931 | data->selected_flavor = RPC_AUTH_MAXFLAVOR; |
Chuck Lever | 9423a08 | 2009-09-23 14:36:38 -0400 | [diff] [blame] | 932 | data->minorversion = 0; |
Bryan Schumaker | b72e4f4 | 2012-05-10 15:07:40 -0400 | [diff] [blame] | 933 | data->need_mount = true; |
Trond Myklebust | 9937347a | 2012-02-19 08:44:07 +0100 | [diff] [blame] | 934 | data->net = current->nsproxy->net_ns; |
Jeff Layton | 8a0d551 | 2011-12-20 06:57:45 -0500 | [diff] [blame] | 935 | security_init_mnt_opts(&data->lsm_opts); |
Chuck Lever | 9423a08 | 2009-09-23 14:36:38 -0400 | [diff] [blame] | 936 | } |
| 937 | return data; |
| 938 | } |
| 939 | |
Jeff Layton | 8a0d551 | 2011-12-20 06:57:45 -0500 | [diff] [blame] | 940 | static 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 Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 953 | /* |
Chuck Lever | cdcd7f9 | 2007-12-10 14:57:45 -0500 | [diff] [blame] | 954 | * 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 Lever | fc50d58 | 2007-07-01 12:12:46 -0400 | [diff] [blame] | 958 | */ |
| 959 | static int nfs_verify_server_address(struct sockaddr *addr) |
| 960 | { |
| 961 | switch (addr->sa_family) { |
| 962 | case AF_INET: { |
Chuck Lever | cdcd7f9 | 2007-12-10 14:57:45 -0500 | [diff] [blame] | 963 | struct sockaddr_in *sa = (struct sockaddr_in *)addr; |
Al Viro | e6f1ceb | 2008-03-17 22:44:53 -0700 | [diff] [blame] | 964 | return sa->sin_addr.s_addr != htonl(INADDR_ANY); |
Chuck Lever | cdcd7f9 | 2007-12-10 14:57:45 -0500 | [diff] [blame] | 965 | } |
| 966 | case AF_INET6: { |
| 967 | struct in6_addr *sa = &((struct sockaddr_in6 *)addr)->sin6_addr; |
| 968 | return !ipv6_addr_any(sa); |
Chuck Lever | fc50d58 | 2007-07-01 12:12:46 -0400 | [diff] [blame] | 969 | } |
| 970 | } |
| 971 | |
Chuck Lever | 53a0b9c | 2009-08-09 15:09:36 -0400 | [diff] [blame] | 972 | dfprintk(MOUNT, "NFS: Invalid IP address specified\n"); |
Chuck Lever | fc50d58 | 2007-07-01 12:12:46 -0400 | [diff] [blame] | 973 | return 0; |
| 974 | } |
| 975 | |
Chuck Lever | 9412b92 | 2007-12-10 14:59:21 -0500 | [diff] [blame] | 976 | /* |
Chuck Lever | 4cfd74f | 2009-09-08 19:49:47 -0400 | [diff] [blame] | 977 | * 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 Myklebust | f5855fe | 2009-10-06 15:40:37 -0400 | [diff] [blame] | 980 | static void nfs_set_port(struct sockaddr *sap, int *port, |
Chuck Lever | 4cfd74f | 2009-09-08 19:49:47 -0400 | [diff] [blame] | 981 | const unsigned short default_port) |
| 982 | { |
Trond Myklebust | f5855fe | 2009-10-06 15:40:37 -0400 | [diff] [blame] | 983 | if (*port == NFS_UNSPEC_PORT) |
| 984 | *port = default_port; |
Chuck Lever | 4cfd74f | 2009-09-08 19:49:47 -0400 | [diff] [blame] | 985 | |
Trond Myklebust | f5855fe | 2009-10-06 15:40:37 -0400 | [diff] [blame] | 986 | rpc_set_port(sap, *port); |
Chuck Lever | 4cfd74f | 2009-09-08 19:49:47 -0400 | [diff] [blame] | 987 | } |
| 988 | |
| 989 | /* |
Trond Myklebust | 259875e | 2008-07-02 14:43:47 -0400 | [diff] [blame] | 990 | * Sanity check the NFS transport protocol. |
| 991 | * |
| 992 | */ |
| 993 | static 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 | */ |
| 1009 | static 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 Adamson | 4d4b69d | 2013-10-18 15:15:19 -0400 | [diff] [blame] | 1027 | * Add 'flavor' to 'auth_info' if not already present. |
| 1028 | * Returns true if 'flavor' ends up in the list, false otherwise |
| 1029 | */ |
| 1030 | static bool nfs_auth_info_add(struct nfs_auth_info *auth_info, |
| 1031 | rpc_authflavor_t flavor) |
| 1032 | { |
| 1033 | unsigned int i; |
Fabian Frederick | 0021602 | 2014-06-30 19:49:39 +0200 | [diff] [blame] | 1034 | unsigned int max_flavor_len = ARRAY_SIZE(auth_info->flavors); |
Weston Andros Adamson | 4d4b69d | 2013-10-18 15:15:19 -0400 | [diff] [blame] | 1035 | |
| 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 | */ |
| 1055 | bool 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 | } |
| 1069 | EXPORT_SYMBOL_GPL(nfs_auth_info_match); |
| 1070 | |
| 1071 | /* |
Chuck Lever | 01060c8 | 2008-06-24 16:33:38 -0400 | [diff] [blame] | 1072 | * Parse the value of the 'sec=' option. |
Chuck Lever | 01060c8 | 2008-06-24 16:33:38 -0400 | [diff] [blame] | 1073 | */ |
| 1074 | static int nfs_parse_security_flavors(char *value, |
| 1075 | struct nfs_parsed_mount_data *mnt) |
| 1076 | { |
| 1077 | substring_t args[MAX_OPT_ARGS]; |
Trond Myklebust | 19e7b8d | 2013-09-07 14:09:52 -0400 | [diff] [blame] | 1078 | rpc_authflavor_t pseudoflavor; |
Weston Andros Adamson | 4d4b69d | 2013-10-18 15:15:19 -0400 | [diff] [blame] | 1079 | char *p; |
Chuck Lever | 01060c8 | 2008-06-24 16:33:38 -0400 | [diff] [blame] | 1080 | |
| 1081 | dfprintk(MOUNT, "NFS: parsing sec=%s option\n", value); |
| 1082 | |
Weston Andros Adamson | 4d4b69d | 2013-10-18 15:15:19 -0400 | [diff] [blame] | 1083 | 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 Lever | 01060c8 | 2008-06-24 16:33:38 -0400 | [diff] [blame] | 1126 | } |
| 1127 | |
| 1128 | return 1; |
| 1129 | } |
| 1130 | |
Trond Myklebust | 0d71b05 | 2012-03-02 13:59:49 -0500 | [diff] [blame] | 1131 | static 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 Dickson | 42c2c42 | 2013-05-22 12:50:38 -0400 | [diff] [blame] | 1159 | case Opt_vers_4_2: |
| 1160 | mnt->version = 4; |
| 1161 | mnt->minorversion = 2; |
| 1162 | break; |
Trond Myklebust | 0d71b05 | 2012-03-02 13:59:49 -0500 | [diff] [blame] | 1163 | default: |
| 1164 | return 0; |
| 1165 | } |
| 1166 | return 1; |
| 1167 | } |
| 1168 | |
Rob Landley | c5cb09b | 2011-03-09 16:02:37 -0600 | [diff] [blame] | 1169 | static int nfs_get_option_str(substring_t args[], char **option) |
| 1170 | { |
| 1171 | kfree(*option); |
| 1172 | *option = match_strdup(args); |
Xi Wang | e25fbe3 | 2013-01-04 03:22:57 -0500 | [diff] [blame] | 1173 | return !*option; |
Rob Landley | c5cb09b | 2011-03-09 16:02:37 -0600 | [diff] [blame] | 1174 | } |
| 1175 | |
| 1176 | static 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 Walter | 7297cb6 | 2012-09-26 21:51:46 +0200 | [diff] [blame] | 1184 | rc = kstrtoul(string, 10, option); |
Rob Landley | c5cb09b | 2011-03-09 16:02:37 -0600 | [diff] [blame] | 1185 | kfree(string); |
| 1186 | |
| 1187 | return rc; |
| 1188 | } |
| 1189 | |
Chuck Lever | 01060c8 | 2008-06-24 16:33:38 -0400 | [diff] [blame] | 1190 | /* |
Chuck Lever | bf0fd76 | 2007-07-01 12:13:44 -0400 | [diff] [blame] | 1191 | * Error-check and convert a string of mount options from user space into |
Chuck Lever | f45663c | 2008-06-24 19:28:02 -0400 | [diff] [blame] | 1192 | * 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 Lever | bf0fd76 | 2007-07-01 12:13:44 -0400 | [diff] [blame] | 1195 | */ |
| 1196 | static int nfs_parse_mount_options(char *raw, |
| 1197 | struct nfs_parsed_mount_data *mnt) |
| 1198 | { |
Eric Paris | f9c3a38 | 2008-03-05 14:20:18 -0500 | [diff] [blame] | 1199 | char *p, *string, *secdata; |
Chuck Lever | d23c45f | 2009-06-17 18:02:13 -0700 | [diff] [blame] | 1200 | int rc, sloppy = 0, invalid_option = 0; |
Jeff Layton | ee671b0 | 2009-12-03 15:58:56 -0500 | [diff] [blame] | 1201 | unsigned short protofamily = AF_UNSPEC; |
| 1202 | unsigned short mountfamily = AF_UNSPEC; |
Chuck Lever | bf0fd76 | 2007-07-01 12:13:44 -0400 | [diff] [blame] | 1203 | |
| 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 Paris | f9c3a38 | 2008-03-05 14:20:18 -0500 | [diff] [blame] | 1210 | 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 Lever | bf0fd76 | 2007-07-01 12:13:44 -0400 | [diff] [blame] | 1224 | while ((p = strsep(&raw, ",")) != NULL) { |
| 1225 | substring_t args[MAX_OPT_ARGS]; |
Chuck Lever | a5a16ba | 2009-06-17 18:02:14 -0700 | [diff] [blame] | 1226 | unsigned long option; |
| 1227 | int token; |
Chuck Lever | bf0fd76 | 2007-07-01 12:13:44 -0400 | [diff] [blame] | 1228 | |
| 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 Lever | f45663c | 2008-06-24 19:28:02 -0400 | [diff] [blame] | 1236 | |
| 1237 | /* |
| 1238 | * boolean options: foo/nofoo |
| 1239 | */ |
Chuck Lever | bf0fd76 | 2007-07-01 12:13:44 -0400 | [diff] [blame] | 1240 | case Opt_soft: |
| 1241 | mnt->flags |= NFS_MOUNT_SOFT; |
| 1242 | break; |
| 1243 | case Opt_hard: |
| 1244 | mnt->flags &= ~NFS_MOUNT_SOFT; |
| 1245 | break; |
Chuck Lever | bf0fd76 | 2007-07-01 12:13:44 -0400 | [diff] [blame] | 1246 | 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 Jayaraman | 5eebde2 | 2010-09-23 08:55:58 -0400 | [diff] [blame] | 1266 | mnt->flags &= ~(NFS_MOUNT_LOCAL_FLOCK | |
| 1267 | NFS_MOUNT_LOCAL_FCNTL); |
Chuck Lever | bf0fd76 | 2007-07-01 12:13:44 -0400 | [diff] [blame] | 1268 | break; |
| 1269 | case Opt_nolock: |
| 1270 | mnt->flags |= NFS_MOUNT_NONLM; |
Suresh Jayaraman | 5eebde2 | 2010-09-23 08:55:58 -0400 | [diff] [blame] | 1271 | mnt->flags |= (NFS_MOUNT_LOCAL_FLOCK | |
| 1272 | NFS_MOUNT_LOCAL_FCNTL); |
Chuck Lever | bf0fd76 | 2007-07-01 12:13:44 -0400 | [diff] [blame] | 1273 | break; |
Chuck Lever | bf0fd76 | 2007-07-01 12:13:44 -0400 | [diff] [blame] | 1274 | case Opt_udp: |
| 1275 | mnt->flags &= ~NFS_MOUNT_TCP; |
\"Talpey, Thomas\ | 0896a72 | 2007-09-10 13:48:23 -0400 | [diff] [blame] | 1276 | mnt->nfs_server.protocol = XPRT_TRANSPORT_UDP; |
Chuck Lever | bf0fd76 | 2007-07-01 12:13:44 -0400 | [diff] [blame] | 1277 | break; |
| 1278 | case Opt_tcp: |
| 1279 | mnt->flags |= NFS_MOUNT_TCP; |
\"Talpey, Thomas\ | 0896a72 | 2007-09-10 13:48:23 -0400 | [diff] [blame] | 1280 | mnt->nfs_server.protocol = XPRT_TRANSPORT_TCP; |
Chuck Lever | bf0fd76 | 2007-07-01 12:13:44 -0400 | [diff] [blame] | 1281 | break; |
\"Talpey, Thomas\ | 2cf7ff7 | 2007-09-10 13:49:41 -0400 | [diff] [blame] | 1282 | case Opt_rdma: |
| 1283 | mnt->flags |= NFS_MOUNT_TCP; /* for side protocols */ |
| 1284 | mnt->nfs_server.protocol = XPRT_TRANSPORT_RDMA; |
Tom Talpey | a67d18f | 2009-03-11 14:37:56 -0400 | [diff] [blame] | 1285 | xprt_load_transport(p); |
\"Talpey, Thomas\ | 2cf7ff7 | 2007-09-10 13:49:41 -0400 | [diff] [blame] | 1286 | break; |
Chuck Lever | bf0fd76 | 2007-07-01 12:13:44 -0400 | [diff] [blame] | 1287 | 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 Myklebust | 75180df | 2007-05-16 16:53:28 -0400 | [diff] [blame] | 1299 | case Opt_sharecache: |
| 1300 | mnt->flags &= ~NFS_MOUNT_UNSHARED; |
| 1301 | break; |
| 1302 | case Opt_nosharecache: |
| 1303 | mnt->flags |= NFS_MOUNT_UNSHARED; |
| 1304 | break; |
Chuck Lever | d740351 | 2008-12-23 15:21:37 -0500 | [diff] [blame] | 1305 | case Opt_resvport: |
| 1306 | mnt->flags &= ~NFS_MOUNT_NORESVPORT; |
| 1307 | break; |
| 1308 | case Opt_noresvport: |
| 1309 | mnt->flags |= NFS_MOUNT_NORESVPORT; |
| 1310 | break; |
David Howells | b797cac | 2009-04-03 16:42:48 +0100 | [diff] [blame] | 1311 | 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 Lever | 8965261 | 2012-09-14 17:24:11 -0400 | [diff] [blame] | 1321 | case Opt_migration: |
| 1322 | mnt->options |= NFS_OPTION_MIGRATION; |
| 1323 | break; |
| 1324 | case Opt_nomigration: |
| 1325 | mnt->options &= NFS_OPTION_MIGRATION; |
| 1326 | break; |
Chuck Lever | bf0fd76 | 2007-07-01 12:13:44 -0400 | [diff] [blame] | 1327 | |
Chuck Lever | f45663c | 2008-06-24 19:28:02 -0400 | [diff] [blame] | 1328 | /* |
| 1329 | * options that take numeric values |
| 1330 | */ |
Chuck Lever | bf0fd76 | 2007-07-01 12:13:44 -0400 | [diff] [blame] | 1331 | case Opt_port: |
Rob Landley | c5cb09b | 2011-03-09 16:02:37 -0600 | [diff] [blame] | 1332 | if (nfs_get_option_ul(args, &option) || |
| 1333 | option > USHRT_MAX) |
Chuck Lever | d23c45f | 2009-06-17 18:02:13 -0700 | [diff] [blame] | 1334 | goto out_invalid_value; |
| 1335 | mnt->nfs_server.port = option; |
Chuck Lever | bf0fd76 | 2007-07-01 12:13:44 -0400 | [diff] [blame] | 1336 | break; |
| 1337 | case Opt_rsize: |
Rob Landley | c5cb09b | 2011-03-09 16:02:37 -0600 | [diff] [blame] | 1338 | if (nfs_get_option_ul(args, &option)) |
Chuck Lever | d23c45f | 2009-06-17 18:02:13 -0700 | [diff] [blame] | 1339 | goto out_invalid_value; |
| 1340 | mnt->rsize = option; |
Chuck Lever | bf0fd76 | 2007-07-01 12:13:44 -0400 | [diff] [blame] | 1341 | break; |
| 1342 | case Opt_wsize: |
Rob Landley | c5cb09b | 2011-03-09 16:02:37 -0600 | [diff] [blame] | 1343 | if (nfs_get_option_ul(args, &option)) |
Chuck Lever | d23c45f | 2009-06-17 18:02:13 -0700 | [diff] [blame] | 1344 | goto out_invalid_value; |
| 1345 | mnt->wsize = option; |
Chuck Lever | bf0fd76 | 2007-07-01 12:13:44 -0400 | [diff] [blame] | 1346 | break; |
| 1347 | case Opt_bsize: |
Rob Landley | c5cb09b | 2011-03-09 16:02:37 -0600 | [diff] [blame] | 1348 | if (nfs_get_option_ul(args, &option)) |
Chuck Lever | d23c45f | 2009-06-17 18:02:13 -0700 | [diff] [blame] | 1349 | goto out_invalid_value; |
| 1350 | mnt->bsize = option; |
Chuck Lever | bf0fd76 | 2007-07-01 12:13:44 -0400 | [diff] [blame] | 1351 | break; |
| 1352 | case Opt_timeo: |
Rob Landley | c5cb09b | 2011-03-09 16:02:37 -0600 | [diff] [blame] | 1353 | if (nfs_get_option_ul(args, &option) || option == 0) |
Chuck Lever | d23c45f | 2009-06-17 18:02:13 -0700 | [diff] [blame] | 1354 | goto out_invalid_value; |
| 1355 | mnt->timeo = option; |
Chuck Lever | bf0fd76 | 2007-07-01 12:13:44 -0400 | [diff] [blame] | 1356 | break; |
| 1357 | case Opt_retrans: |
Rob Landley | c5cb09b | 2011-03-09 16:02:37 -0600 | [diff] [blame] | 1358 | if (nfs_get_option_ul(args, &option) || option == 0) |
Chuck Lever | d23c45f | 2009-06-17 18:02:13 -0700 | [diff] [blame] | 1359 | goto out_invalid_value; |
| 1360 | mnt->retrans = option; |
Chuck Lever | bf0fd76 | 2007-07-01 12:13:44 -0400 | [diff] [blame] | 1361 | break; |
| 1362 | case Opt_acregmin: |
Rob Landley | c5cb09b | 2011-03-09 16:02:37 -0600 | [diff] [blame] | 1363 | if (nfs_get_option_ul(args, &option)) |
Chuck Lever | d23c45f | 2009-06-17 18:02:13 -0700 | [diff] [blame] | 1364 | goto out_invalid_value; |
| 1365 | mnt->acregmin = option; |
Chuck Lever | bf0fd76 | 2007-07-01 12:13:44 -0400 | [diff] [blame] | 1366 | break; |
| 1367 | case Opt_acregmax: |
Rob Landley | c5cb09b | 2011-03-09 16:02:37 -0600 | [diff] [blame] | 1368 | if (nfs_get_option_ul(args, &option)) |
Chuck Lever | d23c45f | 2009-06-17 18:02:13 -0700 | [diff] [blame] | 1369 | goto out_invalid_value; |
| 1370 | mnt->acregmax = option; |
Chuck Lever | bf0fd76 | 2007-07-01 12:13:44 -0400 | [diff] [blame] | 1371 | break; |
| 1372 | case Opt_acdirmin: |
Rob Landley | c5cb09b | 2011-03-09 16:02:37 -0600 | [diff] [blame] | 1373 | if (nfs_get_option_ul(args, &option)) |
Chuck Lever | d23c45f | 2009-06-17 18:02:13 -0700 | [diff] [blame] | 1374 | goto out_invalid_value; |
| 1375 | mnt->acdirmin = option; |
Chuck Lever | bf0fd76 | 2007-07-01 12:13:44 -0400 | [diff] [blame] | 1376 | break; |
| 1377 | case Opt_acdirmax: |
Rob Landley | c5cb09b | 2011-03-09 16:02:37 -0600 | [diff] [blame] | 1378 | if (nfs_get_option_ul(args, &option)) |
Chuck Lever | d23c45f | 2009-06-17 18:02:13 -0700 | [diff] [blame] | 1379 | goto out_invalid_value; |
| 1380 | mnt->acdirmax = option; |
Chuck Lever | bf0fd76 | 2007-07-01 12:13:44 -0400 | [diff] [blame] | 1381 | break; |
| 1382 | case Opt_actimeo: |
Rob Landley | c5cb09b | 2011-03-09 16:02:37 -0600 | [diff] [blame] | 1383 | if (nfs_get_option_ul(args, &option)) |
Chuck Lever | d23c45f | 2009-06-17 18:02:13 -0700 | [diff] [blame] | 1384 | goto out_invalid_value; |
| 1385 | mnt->acregmin = mnt->acregmax = |
| 1386 | mnt->acdirmin = mnt->acdirmax = option; |
Chuck Lever | bf0fd76 | 2007-07-01 12:13:44 -0400 | [diff] [blame] | 1387 | break; |
| 1388 | case Opt_namelen: |
Rob Landley | c5cb09b | 2011-03-09 16:02:37 -0600 | [diff] [blame] | 1389 | if (nfs_get_option_ul(args, &option)) |
Chuck Lever | d23c45f | 2009-06-17 18:02:13 -0700 | [diff] [blame] | 1390 | goto out_invalid_value; |
| 1391 | mnt->namlen = option; |
Chuck Lever | bf0fd76 | 2007-07-01 12:13:44 -0400 | [diff] [blame] | 1392 | break; |
| 1393 | case Opt_mountport: |
Rob Landley | c5cb09b | 2011-03-09 16:02:37 -0600 | [diff] [blame] | 1394 | if (nfs_get_option_ul(args, &option) || |
| 1395 | option > USHRT_MAX) |
Chuck Lever | d23c45f | 2009-06-17 18:02:13 -0700 | [diff] [blame] | 1396 | goto out_invalid_value; |
| 1397 | mnt->mount_server.port = option; |
Chuck Lever | bf0fd76 | 2007-07-01 12:13:44 -0400 | [diff] [blame] | 1398 | break; |
Chuck Lever | bf0fd76 | 2007-07-01 12:13:44 -0400 | [diff] [blame] | 1399 | case Opt_mountvers: |
Rob Landley | c5cb09b | 2011-03-09 16:02:37 -0600 | [diff] [blame] | 1400 | if (nfs_get_option_ul(args, &option) || |
Chuck Lever | f45663c | 2008-06-24 19:28:02 -0400 | [diff] [blame] | 1401 | option < NFS_MNT_VERSION || |
Chuck Lever | d23c45f | 2009-06-17 18:02:13 -0700 | [diff] [blame] | 1402 | option > NFS_MNT3_VERSION) |
| 1403 | goto out_invalid_value; |
| 1404 | mnt->mount_server.version = option; |
Chuck Lever | bf0fd76 | 2007-07-01 12:13:44 -0400 | [diff] [blame] | 1405 | break; |
Mike Sager | 3fd5be9 | 2009-04-01 09:21:48 -0400 | [diff] [blame] | 1406 | case Opt_minorversion: |
Rob Landley | c5cb09b | 2011-03-09 16:02:37 -0600 | [diff] [blame] | 1407 | if (nfs_get_option_ul(args, &option)) |
Chuck Lever | f3f4f4e | 2009-08-09 15:09:29 -0400 | [diff] [blame] | 1408 | goto out_invalid_value; |
| 1409 | if (option > NFS4_MAX_MINOR_VERSION) |
| 1410 | goto out_invalid_value; |
| 1411 | mnt->minorversion = option; |
Mike Sager | 3fd5be9 | 2009-04-01 09:21:48 -0400 | [diff] [blame] | 1412 | break; |
Chuck Lever | bf0fd76 | 2007-07-01 12:13:44 -0400 | [diff] [blame] | 1413 | |
Chuck Lever | f45663c | 2008-06-24 19:28:02 -0400 | [diff] [blame] | 1414 | /* |
| 1415 | * options that take text values |
| 1416 | */ |
Trond Myklebust | 0d71b05 | 2012-03-02 13:59:49 -0500 | [diff] [blame] | 1417 | 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 Lever | bf0fd76 | 2007-07-01 12:13:44 -0400 | [diff] [blame] | 1426 | case Opt_sec: |
| 1427 | string = match_strdup(args); |
| 1428 | if (string == NULL) |
| 1429 | goto out_nomem; |
Chuck Lever | 01060c8 | 2008-06-24 16:33:38 -0400 | [diff] [blame] | 1430 | rc = nfs_parse_security_flavors(string, mnt); |
Chuck Lever | bf0fd76 | 2007-07-01 12:13:44 -0400 | [diff] [blame] | 1431 | kfree(string); |
Chuck Lever | f45663c | 2008-06-24 19:28:02 -0400 | [diff] [blame] | 1432 | if (!rc) { |
Chuck Lever | f45663c | 2008-06-24 19:28:02 -0400 | [diff] [blame] | 1433 | dfprintk(MOUNT, "NFS: unrecognized " |
| 1434 | "security flavor\n"); |
Chuck Lever | d23c45f | 2009-06-17 18:02:13 -0700 | [diff] [blame] | 1435 | return 0; |
Chuck Lever | f45663c | 2008-06-24 19:28:02 -0400 | [diff] [blame] | 1436 | } |
Chuck Lever | bf0fd76 | 2007-07-01 12:13:44 -0400 | [diff] [blame] | 1437 | 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 Lever | bf0fd76 | 2007-07-01 12:13:44 -0400 | [diff] [blame] | 1444 | |
Jeff Layton | ee671b0 | 2009-12-03 15:58:56 -0500 | [diff] [blame] | 1445 | protofamily = AF_INET; |
Chuck Lever | bf0fd76 | 2007-07-01 12:13:44 -0400 | [diff] [blame] | 1446 | switch (token) { |
Jeff Layton | ee671b0 | 2009-12-03 15:58:56 -0500 | [diff] [blame] | 1447 | case Opt_xprt_udp6: |
| 1448 | protofamily = AF_INET6; |
Chuck Lever | fdb66ff | 2007-08-29 17:58:57 -0400 | [diff] [blame] | 1449 | case Opt_xprt_udp: |
Chuck Lever | bf0fd76 | 2007-07-01 12:13:44 -0400 | [diff] [blame] | 1450 | mnt->flags &= ~NFS_MOUNT_TCP; |
\"Talpey, Thomas\ | 0896a72 | 2007-09-10 13:48:23 -0400 | [diff] [blame] | 1451 | mnt->nfs_server.protocol = XPRT_TRANSPORT_UDP; |
Chuck Lever | bf0fd76 | 2007-07-01 12:13:44 -0400 | [diff] [blame] | 1452 | break; |
Jeff Layton | ee671b0 | 2009-12-03 15:58:56 -0500 | [diff] [blame] | 1453 | case Opt_xprt_tcp6: |
| 1454 | protofamily = AF_INET6; |
Chuck Lever | fdb66ff | 2007-08-29 17:58:57 -0400 | [diff] [blame] | 1455 | case Opt_xprt_tcp: |
Chuck Lever | bf0fd76 | 2007-07-01 12:13:44 -0400 | [diff] [blame] | 1456 | mnt->flags |= NFS_MOUNT_TCP; |
\"Talpey, Thomas\ | 0896a72 | 2007-09-10 13:48:23 -0400 | [diff] [blame] | 1457 | mnt->nfs_server.protocol = XPRT_TRANSPORT_TCP; |
Chuck Lever | bf0fd76 | 2007-07-01 12:13:44 -0400 | [diff] [blame] | 1458 | break; |
\"Talpey, Thomas\ | 2cf7ff7 | 2007-09-10 13:49:41 -0400 | [diff] [blame] | 1459 | 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 Talpey | a67d18f | 2009-03-11 14:37:56 -0400 | [diff] [blame] | 1463 | xprt_load_transport(string); |
\"Talpey, Thomas\ | 2cf7ff7 | 2007-09-10 13:49:41 -0400 | [diff] [blame] | 1464 | break; |
Chuck Lever | bf0fd76 | 2007-07-01 12:13:44 -0400 | [diff] [blame] | 1465 | default: |
Chuck Lever | f45663c | 2008-06-24 19:28:02 -0400 | [diff] [blame] | 1466 | dfprintk(MOUNT, "NFS: unrecognized " |
| 1467 | "transport protocol\n"); |
Yinghai Lu | 4223a4a | 2009-10-20 14:13:46 +0900 | [diff] [blame] | 1468 | kfree(string); |
Chuck Lever | d23c45f | 2009-06-17 18:02:13 -0700 | [diff] [blame] | 1469 | return 0; |
Chuck Lever | bf0fd76 | 2007-07-01 12:13:44 -0400 | [diff] [blame] | 1470 | } |
Rob Landley | c5cb09b | 2011-03-09 16:02:37 -0600 | [diff] [blame] | 1471 | kfree(string); |
Chuck Lever | bf0fd76 | 2007-07-01 12:13:44 -0400 | [diff] [blame] | 1472 | 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 Myklebust | d508afb | 2009-04-06 16:41:35 -0700 | [diff] [blame] | 1479 | kfree(string); |
Chuck Lever | bf0fd76 | 2007-07-01 12:13:44 -0400 | [diff] [blame] | 1480 | |
Jeff Layton | ee671b0 | 2009-12-03 15:58:56 -0500 | [diff] [blame] | 1481 | mountfamily = AF_INET; |
Chuck Lever | bf0fd76 | 2007-07-01 12:13:44 -0400 | [diff] [blame] | 1482 | switch (token) { |
Jeff Layton | ee671b0 | 2009-12-03 15:58:56 -0500 | [diff] [blame] | 1483 | case Opt_xprt_udp6: |
| 1484 | mountfamily = AF_INET6; |
Chuck Lever | fdb66ff | 2007-08-29 17:58:57 -0400 | [diff] [blame] | 1485 | case Opt_xprt_udp: |
\"Talpey, Thomas\ | 0896a72 | 2007-09-10 13:48:23 -0400 | [diff] [blame] | 1486 | mnt->mount_server.protocol = XPRT_TRANSPORT_UDP; |
Chuck Lever | bf0fd76 | 2007-07-01 12:13:44 -0400 | [diff] [blame] | 1487 | break; |
Jeff Layton | ee671b0 | 2009-12-03 15:58:56 -0500 | [diff] [blame] | 1488 | case Opt_xprt_tcp6: |
| 1489 | mountfamily = AF_INET6; |
Chuck Lever | fdb66ff | 2007-08-29 17:58:57 -0400 | [diff] [blame] | 1490 | case Opt_xprt_tcp: |
\"Talpey, Thomas\ | 0896a72 | 2007-09-10 13:48:23 -0400 | [diff] [blame] | 1491 | mnt->mount_server.protocol = XPRT_TRANSPORT_TCP; |
Chuck Lever | bf0fd76 | 2007-07-01 12:13:44 -0400 | [diff] [blame] | 1492 | break; |
\"Talpey, Thomas\ | 2cf7ff7 | 2007-09-10 13:49:41 -0400 | [diff] [blame] | 1493 | case Opt_xprt_rdma: /* not used for side protocols */ |
Chuck Lever | bf0fd76 | 2007-07-01 12:13:44 -0400 | [diff] [blame] | 1494 | default: |
Chuck Lever | f45663c | 2008-06-24 19:28:02 -0400 | [diff] [blame] | 1495 | dfprintk(MOUNT, "NFS: unrecognized " |
| 1496 | "transport protocol\n"); |
Chuck Lever | d23c45f | 2009-06-17 18:02:13 -0700 | [diff] [blame] | 1497 | return 0; |
Chuck Lever | bf0fd76 | 2007-07-01 12:13:44 -0400 | [diff] [blame] | 1498 | } |
| 1499 | break; |
| 1500 | case Opt_addr: |
| 1501 | string = match_strdup(args); |
| 1502 | if (string == NULL) |
| 1503 | goto out_nomem; |
Chuck Lever | 53a0b9c | 2009-08-09 15:09:36 -0400 | [diff] [blame] | 1504 | mnt->nfs_server.addrlen = |
Stanislav Kinsbursky | b48e127 | 2012-01-26 15:11:57 +0400 | [diff] [blame] | 1505 | rpc_pton(mnt->net, string, strlen(string), |
Chuck Lever | 53a0b9c | 2009-08-09 15:09:36 -0400 | [diff] [blame] | 1506 | (struct sockaddr *) |
| 1507 | &mnt->nfs_server.address, |
| 1508 | sizeof(mnt->nfs_server.address)); |
Chuck Lever | bf0fd76 | 2007-07-01 12:13:44 -0400 | [diff] [blame] | 1509 | kfree(string); |
Chuck Lever | 53a0b9c | 2009-08-09 15:09:36 -0400 | [diff] [blame] | 1510 | if (mnt->nfs_server.addrlen == 0) |
| 1511 | goto out_invalid_address; |
Chuck Lever | bf0fd76 | 2007-07-01 12:13:44 -0400 | [diff] [blame] | 1512 | break; |
| 1513 | case Opt_clientaddr: |
Rob Landley | c5cb09b | 2011-03-09 16:02:37 -0600 | [diff] [blame] | 1514 | if (nfs_get_option_str(args, &mnt->client_address)) |
Chuck Lever | bf0fd76 | 2007-07-01 12:13:44 -0400 | [diff] [blame] | 1515 | goto out_nomem; |
Chuck Lever | bf0fd76 | 2007-07-01 12:13:44 -0400 | [diff] [blame] | 1516 | break; |
Chuck Lever | 3383203 | 2007-12-10 14:59:13 -0500 | [diff] [blame] | 1517 | case Opt_mounthost: |
Rob Landley | c5cb09b | 2011-03-09 16:02:37 -0600 | [diff] [blame] | 1518 | if (nfs_get_option_str(args, |
| 1519 | &mnt->mount_server.hostname)) |
Chuck Lever | 3383203 | 2007-12-10 14:59:13 -0500 | [diff] [blame] | 1520 | goto out_nomem; |
Chuck Lever | 3383203 | 2007-12-10 14:59:13 -0500 | [diff] [blame] | 1521 | break; |
Chuck Lever | 0ac8377 | 2007-09-11 18:01:04 -0400 | [diff] [blame] | 1522 | case Opt_mountaddr: |
Chuck Lever | bf0fd76 | 2007-07-01 12:13:44 -0400 | [diff] [blame] | 1523 | string = match_strdup(args); |
| 1524 | if (string == NULL) |
| 1525 | goto out_nomem; |
Chuck Lever | 53a0b9c | 2009-08-09 15:09:36 -0400 | [diff] [blame] | 1526 | mnt->mount_server.addrlen = |
Stanislav Kinsbursky | b48e127 | 2012-01-26 15:11:57 +0400 | [diff] [blame] | 1527 | rpc_pton(mnt->net, string, strlen(string), |
Chuck Lever | 53a0b9c | 2009-08-09 15:09:36 -0400 | [diff] [blame] | 1528 | (struct sockaddr *) |
| 1529 | &mnt->mount_server.address, |
| 1530 | sizeof(mnt->mount_server.address)); |
Chuck Lever | bf0fd76 | 2007-07-01 12:13:44 -0400 | [diff] [blame] | 1531 | kfree(string); |
Chuck Lever | 53a0b9c | 2009-08-09 15:09:36 -0400 | [diff] [blame] | 1532 | if (mnt->mount_server.addrlen == 0) |
| 1533 | goto out_invalid_address; |
Chuck Lever | bf0fd76 | 2007-07-01 12:13:44 -0400 | [diff] [blame] | 1534 | break; |
Trond Myklebust | 7973c1f1 | 2008-07-15 17:58:14 -0400 | [diff] [blame] | 1535 | 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 Myklebust | 7973c1f1 | 2008-07-15 17:58:14 -0400 | [diff] [blame] | 1554 | dfprintk(MOUNT, "NFS: invalid " |
| 1555 | "lookupcache argument\n"); |
Chuck Lever | d23c45f | 2009-06-17 18:02:13 -0700 | [diff] [blame] | 1556 | return 0; |
Trond Myklebust | 7973c1f1 | 2008-07-15 17:58:14 -0400 | [diff] [blame] | 1557 | }; |
| 1558 | break; |
Chuck Lever | a6d5ff6 | 2010-05-07 13:33:58 -0400 | [diff] [blame] | 1559 | case Opt_fscache_uniq: |
Rob Landley | c5cb09b | 2011-03-09 16:02:37 -0600 | [diff] [blame] | 1560 | if (nfs_get_option_str(args, &mnt->fscache_uniq)) |
Chuck Lever | a6d5ff6 | 2010-05-07 13:33:58 -0400 | [diff] [blame] | 1561 | goto out_nomem; |
Chuck Lever | a6d5ff6 | 2010-05-07 13:33:58 -0400 | [diff] [blame] | 1562 | mnt->options |= NFS_OPTION_FSCACHE; |
| 1563 | break; |
Suresh Jayaraman | 5eebde2 | 2010-09-23 08:55:58 -0400 | [diff] [blame] | 1564 | 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 Lever | bf0fd76 | 2007-07-01 12:13:44 -0400 | [diff] [blame] | 1592 | |
Chuck Lever | f45663c | 2008-06-24 19:28:02 -0400 | [diff] [blame] | 1593 | /* |
| 1594 | * Special options |
| 1595 | */ |
| 1596 | case Opt_sloppy: |
| 1597 | sloppy = 1; |
| 1598 | dfprintk(MOUNT, "NFS: relaxing parsing rules\n"); |
| 1599 | break; |
Chuck Lever | bf0fd76 | 2007-07-01 12:13:44 -0400 | [diff] [blame] | 1600 | case Opt_userspace: |
| 1601 | case Opt_deprecated: |
Chuck Lever | d33e4df | 2008-06-12 12:37:41 -0400 | [diff] [blame] | 1602 | dfprintk(MOUNT, "NFS: ignoring mount option " |
| 1603 | "'%s'\n", p); |
Chuck Lever | bf0fd76 | 2007-07-01 12:13:44 -0400 | [diff] [blame] | 1604 | break; |
| 1605 | |
| 1606 | default: |
Chuck Lever | d23c45f | 2009-06-17 18:02:13 -0700 | [diff] [blame] | 1607 | invalid_option = 1; |
Chuck Lever | f45663c | 2008-06-24 19:28:02 -0400 | [diff] [blame] | 1608 | dfprintk(MOUNT, "NFS: unrecognized mount option " |
| 1609 | "'%s'\n", p); |
Chuck Lever | bf0fd76 | 2007-07-01 12:13:44 -0400 | [diff] [blame] | 1610 | } |
| 1611 | } |
| 1612 | |
Chuck Lever | d23c45f | 2009-06-17 18:02:13 -0700 | [diff] [blame] | 1613 | if (!sloppy && invalid_option) |
| 1614 | return 0; |
| 1615 | |
Weston Andros Adamson | 571b755 | 2012-02-01 14:06:41 -0500 | [diff] [blame] | 1616 | if (mnt->minorversion && mnt->version != 4) |
| 1617 | goto out_minorversion_mismatch; |
| 1618 | |
Chuck Lever | 8965261 | 2012-09-14 17:24:11 -0400 | [diff] [blame] | 1619 | if (mnt->options & NFS_OPTION_MIGRATION && |
NeilBrown | 9e08ef1 | 2013-11-14 13:00:17 +1100 | [diff] [blame] | 1620 | (mnt->version != 4 || mnt->minorversion != 0)) |
Chuck Lever | 8965261 | 2012-09-14 17:24:11 -0400 | [diff] [blame] | 1621 | goto out_migration_misuse; |
| 1622 | |
Jeff Layton | ee671b0 | 2009-12-03 15:58:56 -0500 | [diff] [blame] | 1623 | /* |
| 1624 | * verify that any proto=/mountproto= options match the address |
Peter Meerwald | 1856b22 | 2012-08-18 17:38:54 +0200 | [diff] [blame] | 1625 | * families in the addr=/mountaddr= options. |
Jeff Layton | ee671b0 | 2009-12-03 15:58:56 -0500 | [diff] [blame] | 1626 | */ |
| 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 Lever | bf0fd76 | 2007-07-01 12:13:44 -0400 | [diff] [blame] | 1641 | return 1; |
| 1642 | |
Jeff Layton | ee671b0 | 2009-12-03 15:58:56 -0500 | [diff] [blame] | 1643 | out_mountproto_mismatch: |
| 1644 | printk(KERN_INFO "NFS: mount server address does not match mountproto= " |
| 1645 | "option\n"); |
| 1646 | return 0; |
| 1647 | out_proto_mismatch: |
| 1648 | printk(KERN_INFO "NFS: server address does not match proto= option\n"); |
| 1649 | return 0; |
Chuck Lever | 53a0b9c | 2009-08-09 15:09:36 -0400 | [diff] [blame] | 1650 | out_invalid_address: |
| 1651 | printk(KERN_INFO "NFS: bad IP address specified: %s\n", p); |
| 1652 | return 0; |
Chuck Lever | d23c45f | 2009-06-17 18:02:13 -0700 | [diff] [blame] | 1653 | out_invalid_value: |
Chuck Lever | 53a0b9c | 2009-08-09 15:09:36 -0400 | [diff] [blame] | 1654 | printk(KERN_INFO "NFS: bad mount option value specified: %s\n", p); |
Chuck Lever | d23c45f | 2009-06-17 18:02:13 -0700 | [diff] [blame] | 1655 | return 0; |
Weston Andros Adamson | 571b755 | 2012-02-01 14:06:41 -0500 | [diff] [blame] | 1656 | out_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 Lever | 8965261 | 2012-09-14 17:24:11 -0400 | [diff] [blame] | 1660 | out_migration_misuse: |
| 1661 | printk(KERN_INFO |
| 1662 | "NFS: 'migration' not supported for this NFS version\n"); |
| 1663 | return 0; |
Chuck Lever | bf0fd76 | 2007-07-01 12:13:44 -0400 | [diff] [blame] | 1664 | out_nomem: |
| 1665 | printk(KERN_INFO "NFS: not enough memory to parse option\n"); |
| 1666 | return 0; |
Eric Paris | f9c3a38 | 2008-03-05 14:20:18 -0500 | [diff] [blame] | 1667 | out_security_failure: |
| 1668 | free_secdata(secdata); |
| 1669 | printk(KERN_INFO "NFS: security options invalid: %d\n", rc); |
| 1670 | return 0; |
Chuck Lever | bf0fd76 | 2007-07-01 12:13:44 -0400 | [diff] [blame] | 1671 | } |
| 1672 | |
| 1673 | /* |
Weston Andros Adamson | 4d4b69d | 2013-10-18 15:15:19 -0400 | [diff] [blame] | 1674 | * 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 Lever | ec88f28 | 2009-08-09 15:09:32 -0400 | [diff] [blame] | 1677 | */ |
Weston Andros Adamson | 4d4b69d | 2013-10-18 15:15:19 -0400 | [diff] [blame] | 1678 | static int nfs_verify_authflavors(struct nfs_parsed_mount_data *args, |
Jeff Layton | 9111c95 | 2013-06-27 15:54:41 -0400 | [diff] [blame] | 1679 | rpc_authflavor_t *server_authlist, unsigned int count) |
Chuck Lever | ec88f28 | 2009-08-09 15:09:32 -0400 | [diff] [blame] | 1680 | { |
Weston Andros Adamson | 4d4b69d | 2013-10-18 15:15:19 -0400 | [diff] [blame] | 1681 | rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR; |
Jeff Layton | 9111c95 | 2013-06-27 15:54:41 -0400 | [diff] [blame] | 1682 | unsigned int i; |
Chuck Lever | 4580a92 | 2013-03-22 12:53:17 -0400 | [diff] [blame] | 1683 | |
Chuck Lever | 4580a92 | 2013-03-22 12:53:17 -0400 | [diff] [blame] | 1684 | /* |
Weston Andros Adamson | d497ab9 | 2013-05-06 17:12:13 -0400 | [diff] [blame] | 1685 | * 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 Lever | 4580a92 | 2013-03-22 12:53:17 -0400 | [diff] [blame] | 1692 | for (i = 0; i < count; i++) { |
Weston Andros Adamson | 4d4b69d | 2013-10-18 15:15:19 -0400 | [diff] [blame] | 1693 | flavor = server_authlist[i]; |
| 1694 | |
| 1695 | if (nfs_auth_info_match(&args->auth_info, flavor) || |
| 1696 | flavor == RPC_AUTH_NULL) |
Jeff Layton | 9111c95 | 2013-06-27 15:54:41 -0400 | [diff] [blame] | 1697 | goto out; |
Chuck Lever | 4580a92 | 2013-03-22 12:53:17 -0400 | [diff] [blame] | 1698 | } |
| 1699 | |
Weston Andros Adamson | 4d4b69d | 2013-10-18 15:15:19 -0400 | [diff] [blame] | 1700 | dfprintk(MOUNT, |
| 1701 | "NFS: specified auth flavors not supported by server\n"); |
Weston Andros Adamson | d497ab9 | 2013-05-06 17:12:13 -0400 | [diff] [blame] | 1702 | return -EACCES; |
Jeff Layton | 9111c95 | 2013-06-27 15:54:41 -0400 | [diff] [blame] | 1703 | |
| 1704 | out: |
Weston Andros Adamson | 4d4b69d | 2013-10-18 15:15:19 -0400 | [diff] [blame] | 1705 | args->selected_flavor = flavor; |
Weston Andros Adamson | a3f73c2 | 2013-10-18 15:15:16 -0400 | [diff] [blame] | 1706 | dfprintk(MOUNT, "NFS: using auth flavor %u\n", args->selected_flavor); |
Jeff Layton | 9111c95 | 2013-06-27 15:54:41 -0400 | [diff] [blame] | 1707 | return 0; |
Chuck Lever | ec88f28 | 2009-08-09 15:09:32 -0400 | [diff] [blame] | 1708 | } |
| 1709 | |
| 1710 | /* |
Chuck Lever | 0076d7b | 2007-07-01 12:13:49 -0400 | [diff] [blame] | 1711 | * Use the remote server's MOUNT service to request the NFS file handle |
| 1712 | * corresponding to the provided path. |
| 1713 | */ |
Bryan Schumaker | 486aa69 | 2012-05-10 15:07:39 -0400 | [diff] [blame] | 1714 | static int nfs_request_mount(struct nfs_parsed_mount_data *args, |
Jeff Layton | 294ae81 | 2013-06-27 15:54:39 -0400 | [diff] [blame] | 1715 | struct nfs_fh *root_fh, |
| 1716 | rpc_authflavor_t *server_authlist, |
| 1717 | unsigned int *server_authlist_len) |
Chuck Lever | 0076d7b | 2007-07-01 12:13:49 -0400 | [diff] [blame] | 1718 | { |
Chuck Lever | c5d120f | 2008-12-23 15:21:35 -0500 | [diff] [blame] | 1719 | 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 Lever | 50a737f | 2008-12-23 15:21:37 -0500 | [diff] [blame] | 1725 | .noresvport = args->flags & NFS_MOUNT_NORESVPORT, |
Jeff Layton | 294ae81 | 2013-06-27 15:54:39 -0400 | [diff] [blame] | 1726 | .auth_flav_len = server_authlist_len, |
Chuck Lever | ec88f28 | 2009-08-09 15:09:32 -0400 | [diff] [blame] | 1727 | .auth_flavs = server_authlist, |
Stanislav Kinsbursky | 6d59b8d | 2012-01-10 16:12:54 +0400 | [diff] [blame] | 1728 | .net = args->net, |
Chuck Lever | c5d120f | 2008-12-23 15:21:35 -0500 | [diff] [blame] | 1729 | }; |
Chuck Lever | 4c56801 | 2007-12-10 14:59:28 -0500 | [diff] [blame] | 1730 | int status; |
Chuck Lever | 0076d7b | 2007-07-01 12:13:49 -0400 | [diff] [blame] | 1731 | |
| 1732 | if (args->mount_server.version == 0) { |
Trond Myklebust | 8a6e5de | 2009-09-23 14:36:37 -0400 | [diff] [blame] | 1733 | 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 Lever | 0076d7b | 2007-07-01 12:13:49 -0400 | [diff] [blame] | 1740 | } |
Chuck Lever | c5d120f | 2008-12-23 15:21:35 -0500 | [diff] [blame] | 1741 | request.version = args->mount_server.version; |
Chuck Lever | 0076d7b | 2007-07-01 12:13:49 -0400 | [diff] [blame] | 1742 | |
Chuck Lever | 3383203 | 2007-12-10 14:59:13 -0500 | [diff] [blame] | 1743 | if (args->mount_server.hostname) |
Chuck Lever | c5d120f | 2008-12-23 15:21:35 -0500 | [diff] [blame] | 1744 | request.hostname = args->mount_server.hostname; |
Chuck Lever | 3383203 | 2007-12-10 14:59:13 -0500 | [diff] [blame] | 1745 | else |
Chuck Lever | c5d120f | 2008-12-23 15:21:35 -0500 | [diff] [blame] | 1746 | request.hostname = args->nfs_server.hostname; |
Chuck Lever | 3383203 | 2007-12-10 14:59:13 -0500 | [diff] [blame] | 1747 | |
Chuck Lever | 0076d7b | 2007-07-01 12:13:49 -0400 | [diff] [blame] | 1748 | /* |
| 1749 | * Construct the mount server's address. |
| 1750 | */ |
Chuck Lever | 4c56801 | 2007-12-10 14:59:28 -0500 | [diff] [blame] | 1751 | if (args->mount_server.address.ss_family == AF_UNSPEC) { |
Chuck Lever | c5d120f | 2008-12-23 15:21:35 -0500 | [diff] [blame] | 1752 | memcpy(request.sap, &args->nfs_server.address, |
Chuck Lever | 4c56801 | 2007-12-10 14:59:28 -0500 | [diff] [blame] | 1753 | args->nfs_server.addrlen); |
| 1754 | args->mount_server.addrlen = args->nfs_server.addrlen; |
| 1755 | } |
Chuck Lever | c5d120f | 2008-12-23 15:21:35 -0500 | [diff] [blame] | 1756 | request.salen = args->mount_server.addrlen; |
Trond Myklebust | f5855fe | 2009-10-06 15:40:37 -0400 | [diff] [blame] | 1757 | nfs_set_port(request.sap, &args->mount_server.port, 0); |
Chuck Lever | 0076d7b | 2007-07-01 12:13:49 -0400 | [diff] [blame] | 1758 | |
| 1759 | /* |
| 1760 | * Now ask the mount server to map our export path |
| 1761 | * to a file handle. |
| 1762 | */ |
Chuck Lever | c5d120f | 2008-12-23 15:21:35 -0500 | [diff] [blame] | 1763 | status = nfs_mount(&request); |
Chuck Lever | ec88f28 | 2009-08-09 15:09:32 -0400 | [diff] [blame] | 1764 | if (status != 0) { |
| 1765 | dfprintk(MOUNT, "NFS: unable to mount server %s, error %d\n", |
| 1766 | request.hostname, status); |
| 1767 | return status; |
| 1768 | } |
Chuck Lever | 0076d7b | 2007-07-01 12:13:49 -0400 | [diff] [blame] | 1769 | |
Jeff Layton | 9111c95 | 2013-06-27 15:54:41 -0400 | [diff] [blame] | 1770 | return 0; |
Chuck Lever | 0076d7b | 2007-07-01 12:13:49 -0400 | [diff] [blame] | 1771 | } |
| 1772 | |
Jeff Layton | d17540c | 2013-06-27 15:54:38 -0400 | [diff] [blame] | 1773 | static struct nfs_server *nfs_try_mount_request(struct nfs_mount_info *mount_info, |
| 1774 | struct nfs_subversion *nfs_mod) |
| 1775 | { |
| 1776 | int status; |
Jeff Layton | 9111c95 | 2013-06-27 15:54:41 -0400 | [diff] [blame] | 1777 | 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 Layton | 294ae81 | 2013-06-27 15:54:39 -0400 | [diff] [blame] | 1781 | 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 Layton | d17540c | 2013-06-27 15:54:38 -0400 | [diff] [blame] | 1784 | |
Jeff Layton | 294ae81 | 2013-06-27 15:54:39 -0400 | [diff] [blame] | 1785 | status = nfs_request_mount(args, mount_info->mntfh, authlist, |
| 1786 | &authlist_len); |
Jeff Layton | d17540c | 2013-06-27 15:54:38 -0400 | [diff] [blame] | 1787 | if (status) |
| 1788 | return ERR_PTR(status); |
| 1789 | |
Jeff Layton | 9111c95 | 2013-06-27 15:54:41 -0400 | [diff] [blame] | 1790 | /* |
| 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 Adamson | a3f73c2 | 2013-10-18 15:15:16 -0400 | [diff] [blame] | 1794 | if (args->auth_info.flavor_len > 0) { |
Weston Andros Adamson | 4d4b69d | 2013-10-18 15:15:19 -0400 | [diff] [blame] | 1795 | status = nfs_verify_authflavors(args, authlist, authlist_len); |
Weston Andros Adamson | a3f73c2 | 2013-10-18 15:15:16 -0400 | [diff] [blame] | 1796 | dfprintk(MOUNT, "NFS: using auth flavor %u\n", |
| 1797 | args->selected_flavor); |
Jeff Layton | 9111c95 | 2013-06-27 15:54:41 -0400 | [diff] [blame] | 1798 | 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 Adamson | a3f73c2 | 2013-10-18 15:15:16 -0400 | [diff] [blame] | 1826 | args->selected_flavor = flavor; |
Jeff Layton | 9111c95 | 2013-06-27 15:54:41 -0400 | [diff] [blame] | 1827 | 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 Adamson | a3f73c2 | 2013-10-18 15:15:16 -0400 | [diff] [blame] | 1842 | args->selected_flavor = RPC_AUTH_UNIX; |
Jeff Layton | d17540c | 2013-06-27 15:54:38 -0400 | [diff] [blame] | 1843 | return nfs_mod->rpc_ops->create_server(mount_info, nfs_mod); |
| 1844 | } |
| 1845 | |
Bryan Schumaker | ff9099f2 | 2012-07-30 16:05:18 -0400 | [diff] [blame] | 1846 | struct dentry *nfs_try_mount(int flags, const char *dev_name, |
| 1847 | struct nfs_mount_info *mount_info, |
| 1848 | struct nfs_subversion *nfs_mod) |
Bryan Schumaker | 486aa69 | 2012-05-10 15:07:39 -0400 | [diff] [blame] | 1849 | { |
Bryan Schumaker | 486aa69 | 2012-05-10 15:07:39 -0400 | [diff] [blame] | 1850 | struct nfs_server *server; |
| 1851 | |
Jeff Layton | d17540c | 2013-06-27 15:54:38 -0400 | [diff] [blame] | 1852 | 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 Schumaker | 486aa69 | 2012-05-10 15:07:39 -0400 | [diff] [blame] | 1856 | |
Bryan Schumaker | 486aa69 | 2012-05-10 15:07:39 -0400 | [diff] [blame] | 1857 | if (IS_ERR(server)) |
| 1858 | return ERR_CAST(server); |
| 1859 | |
Bryan Schumaker | ab7017a | 2012-07-30 16:05:16 -0400 | [diff] [blame] | 1860 | return nfs_fs_mount_common(server, flags, dev_name, mount_info, nfs_mod); |
Bryan Schumaker | 486aa69 | 2012-05-10 15:07:39 -0400 | [diff] [blame] | 1861 | } |
Bryan Schumaker | ddda8e0 | 2012-07-30 16:05:23 -0400 | [diff] [blame] | 1862 | EXPORT_SYMBOL_GPL(nfs_try_mount); |
Bryan Schumaker | 486aa69 | 2012-05-10 15:07:39 -0400 | [diff] [blame] | 1863 | |
Rob Landley | c12bace | 2011-03-09 15:54:13 -0600 | [diff] [blame] | 1864 | /* |
| 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 | */ |
| 1873 | static int nfs_parse_devname(const char *dev_name, |
| 1874 | char **hostname, size_t maxnamlen, |
| 1875 | char **export_path, size_t maxpathlen) |
Chuck Lever | dc04589 | 2008-06-23 12:36:37 -0400 | [diff] [blame] | 1876 | { |
| 1877 | size_t len; |
Rob Landley | c12bace | 2011-03-09 15:54:13 -0600 | [diff] [blame] | 1878 | char *end; |
Chuck Lever | dc04589 | 2008-06-23 12:36:37 -0400 | [diff] [blame] | 1879 | |
Rob Landley | c12bace | 2011-03-09 15:54:13 -0600 | [diff] [blame] | 1880 | /* 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 Lever | dc04589 | 2008-06-23 12:36:37 -0400 | [diff] [blame] | 1885 | |
Rob Landley | c12bace | 2011-03-09 15:54:13 -0600 | [diff] [blame] | 1886 | 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 Lever | dc04589 | 2008-06-23 12:36:37 -0400 | [diff] [blame] | 1902 | 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 Landley | c12bace | 2011-03-09 15:54:13 -0600 | [diff] [blame] | 1907 | if (*hostname == NULL) |
Chuck Lever | dc04589 | 2008-06-23 12:36:37 -0400 | [diff] [blame] | 1908 | goto out_nomem; |
Rob Landley | c12bace | 2011-03-09 15:54:13 -0600 | [diff] [blame] | 1909 | len = strlen(++end); |
Chuck Lever | dc04589 | 2008-06-23 12:36:37 -0400 | [diff] [blame] | 1910 | if (len > maxpathlen) |
| 1911 | goto out_path; |
Rob Landley | c12bace | 2011-03-09 15:54:13 -0600 | [diff] [blame] | 1912 | *export_path = kstrndup(end, len, GFP_KERNEL); |
Chuck Lever | dc04589 | 2008-06-23 12:36:37 -0400 | [diff] [blame] | 1913 | if (!*export_path) |
| 1914 | goto out_nomem; |
| 1915 | |
| 1916 | dfprintk(MOUNT, "NFS: MNTPATH: '%s'\n", *export_path); |
| 1917 | return 0; |
| 1918 | |
| 1919 | out_bad_devname: |
| 1920 | dfprintk(MOUNT, "NFS: device name not in host:path format\n"); |
| 1921 | return -EINVAL; |
| 1922 | |
| 1923 | out_nomem: |
| 1924 | dfprintk(MOUNT, "NFS: not enough memory to parse device name\n"); |
| 1925 | return -ENOMEM; |
| 1926 | |
| 1927 | out_hostname: |
| 1928 | dfprintk(MOUNT, "NFS: server hostname too long\n"); |
| 1929 | return -ENAMETOOLONG; |
| 1930 | |
| 1931 | out_path: |
| 1932 | dfprintk(MOUNT, "NFS: export pathname too long\n"); |
| 1933 | return -ENAMETOOLONG; |
| 1934 | } |
| 1935 | |
| 1936 | /* |
David Howells | 54ceac4 | 2006-08-22 20:06:13 -0400 | [diff] [blame] | 1937 | * Validate the NFS2/NFS3 mount data |
| 1938 | * - fills in the mount root filehandle |
Chuck Lever | 136d558 | 2007-07-01 12:13:54 -0400 | [diff] [blame] | 1939 | * |
| 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 Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 1951 | */ |
Bryan Schumaker | d72c727 | 2012-05-10 15:07:41 -0400 | [diff] [blame] | 1952 | static 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 Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 1956 | { |
\"Talpey, Thomas\ | 2283f8d | 2007-09-10 13:43:56 -0400 | [diff] [blame] | 1957 | struct nfs_mount_data *data = (struct nfs_mount_data *)options; |
Chuck Lever | 4cfd74f | 2009-09-08 19:49:47 -0400 | [diff] [blame] | 1958 | struct sockaddr *sap = (struct sockaddr *)&args->nfs_server.address; |
Trond Myklebust | 74c9881 | 2013-09-07 13:26:57 -0400 | [diff] [blame] | 1959 | int extra_flags = NFS_MOUNT_LEGACY_INTERFACE; |
Chuck Lever | 136d558 | 2007-07-01 12:13:54 -0400 | [diff] [blame] | 1960 | |
Chuck Lever | 5df36e7 | 2007-07-01 12:12:56 -0400 | [diff] [blame] | 1961 | if (data == NULL) |
| 1962 | goto out_no_data; |
David Howells | 54ceac4 | 2006-08-22 20:06:13 -0400 | [diff] [blame] | 1963 | |
Bryan Schumaker | c5afc8d | 2012-06-08 11:32:56 -0400 | [diff] [blame] | 1964 | args->version = NFS_DEFAULT_VERSION; |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 1965 | switch (data->version) { |
Chuck Lever | 5df36e7 | 2007-07-01 12:12:56 -0400 | [diff] [blame] | 1966 | 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 Myklebust | 74c9881 | 2013-09-07 13:26:57 -0400 | [diff] [blame] | 1975 | /* Turn off security negotiation */ |
| 1976 | extra_flags |= NFS_MOUNT_SECFLAVOUR; |
Chuck Lever | 5df36e7 | 2007-07-01 12:12:56 -0400 | [diff] [blame] | 1977 | 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 Myklebust | b7e2445 | 2008-06-19 15:21:11 -0400 | [diff] [blame] | 1983 | if (data->flags & NFS_MOUNT_VER3) { |
| 1984 | if (data->root.size > NFS3_FHSIZE || data->root.size == 0) |
| 1985 | goto out_invalid_fh; |
Chuck Lever | 5df36e7 | 2007-07-01 12:12:56 -0400 | [diff] [blame] | 1986 | mntfh->size = data->root.size; |
Chuck Lever | 764302c | 2009-09-08 19:50:03 -0400 | [diff] [blame] | 1987 | args->version = 3; |
| 1988 | } else { |
Chuck Lever | 5df36e7 | 2007-07-01 12:12:56 -0400 | [diff] [blame] | 1989 | mntfh->size = NFS2_FHSIZE; |
Chuck Lever | 764302c | 2009-09-08 19:50:03 -0400 | [diff] [blame] | 1990 | args->version = 2; |
| 1991 | } |
Chuck Lever | 5df36e7 | 2007-07-01 12:12:56 -0400 | [diff] [blame] | 1992 | |
Chuck Lever | 5df36e7 | 2007-07-01 12:12:56 -0400 | [diff] [blame] | 1993 | |
| 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 Lever | 6e88e06 | 2007-09-24 15:39:50 -0400 | [diff] [blame] | 1998 | |
\"Talpey, Thomas\ | 2283f8d | 2007-09-10 13:43:56 -0400 | [diff] [blame] | 1999 | /* |
| 2000 | * Translate to nfs_parsed_mount_data, which nfs_fill_super |
| 2001 | * can deal with. |
| 2002 | */ |
Trond Myklebust | ff3525a | 2008-08-15 16:59:14 -0400 | [diff] [blame] | 2003 | args->flags = data->flags & NFS_MOUNT_FLAGMASK; |
Trond Myklebust | 74c9881 | 2013-09-07 13:26:57 -0400 | [diff] [blame] | 2004 | args->flags |= extra_flags; |
\"Talpey, Thomas\ | 2283f8d | 2007-09-10 13:43:56 -0400 | [diff] [blame] | 2005 | args->rsize = data->rsize; |
| 2006 | args->wsize = data->wsize; |
\"Talpey, Thomas\ | 2283f8d | 2007-09-10 13:43:56 -0400 | [diff] [blame] | 2007 | 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 Schumaker | b72e4f4 | 2012-05-10 15:07:40 -0400 | [diff] [blame] | 2013 | args->need_mount = false; |
Chuck Lever | 4c56801 | 2007-12-10 14:59:28 -0500 | [diff] [blame] | 2014 | |
Chuck Lever | 4cfd74f | 2009-09-08 19:49:47 -0400 | [diff] [blame] | 2015 | memcpy(sap, &data->addr, sizeof(data->addr)); |
Chuck Lever | 4c56801 | 2007-12-10 14:59:28 -0500 | [diff] [blame] | 2016 | args->nfs_server.addrlen = sizeof(data->addr); |
Trond Myklebust | 872ece8 | 2012-09-04 11:05:07 -0400 | [diff] [blame] | 2017 | args->nfs_server.port = ntohs(data->addr.sin_port); |
Chuck Lever | 4cfd74f | 2009-09-08 19:49:47 -0400 | [diff] [blame] | 2018 | if (!nfs_verify_server_address(sap)) |
Chuck Lever | 4c56801 | 2007-12-10 14:59:28 -0500 | [diff] [blame] | 2019 | goto out_no_address; |
| 2020 | |
\"Talpey, Thomas\ | 2283f8d | 2007-09-10 13:43:56 -0400 | [diff] [blame] | 2021 | if (!(data->flags & NFS_MOUNT_TCP)) |
\"Talpey, Thomas\ | 0896a72 | 2007-09-10 13:48:23 -0400 | [diff] [blame] | 2022 | args->nfs_server.protocol = XPRT_TRANSPORT_UDP; |
\"Talpey, Thomas\ | 2283f8d | 2007-09-10 13:43:56 -0400 | [diff] [blame] | 2023 | /* 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 Lever | dd07c94 | 2008-06-24 16:33:46 -0400 | [diff] [blame] | 2027 | |
| 2028 | if (data->flags & NFS_MOUNT_SECFLAVOUR) |
Weston Andros Adamson | a3f73c2 | 2013-10-18 15:15:16 -0400 | [diff] [blame] | 2029 | args->selected_flavor = data->pseudoflavor; |
Trond Myklebust | 74c9881 | 2013-09-07 13:26:57 -0400 | [diff] [blame] | 2030 | else |
Weston Andros Adamson | a3f73c2 | 2013-10-18 15:15:16 -0400 | [diff] [blame] | 2031 | args->selected_flavor = RPC_AUTH_UNIX; |
Cyrill Gorcunov | 63649bd | 2008-04-17 20:42:09 +0400 | [diff] [blame] | 2032 | if (!args->nfs_server.hostname) |
| 2033 | goto out_nomem; |
Eric Paris | f9c3a38 | 2008-03-05 14:20:18 -0500 | [diff] [blame] | 2034 | |
Suresh Jayaraman | 5eebde2 | 2010-09-23 08:55:58 -0400 | [diff] [blame] | 2035 | 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 Paris | f9c3a38 | 2008-03-05 14:20:18 -0500 | [diff] [blame] | 2041 | /* |
| 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 Lever | 5df36e7 | 2007-07-01 12:12:56 -0400 | [diff] [blame] | 2067 | break; |
Bryan Schumaker | b72e4f4 | 2012-05-10 15:07:40 -0400 | [diff] [blame] | 2068 | default: |
| 2069 | return NFS_TEXT_DATA; |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 2070 | } |
David Howells | 54ceac4 | 2006-08-22 20:06:13 -0400 | [diff] [blame] | 2071 | |
David Howells | 54ceac4 | 2006-08-22 20:06:13 -0400 | [diff] [blame] | 2072 | return 0; |
Chuck Lever | 5df36e7 | 2007-07-01 12:12:56 -0400 | [diff] [blame] | 2073 | |
| 2074 | out_no_data: |
| 2075 | dfprintk(MOUNT, "NFS: mount program didn't pass any mount data\n"); |
| 2076 | return -EINVAL; |
| 2077 | |
| 2078 | out_no_v3: |
| 2079 | dfprintk(MOUNT, "NFS: nfs_mount_data version %d does not support v3\n", |
| 2080 | data->version); |
| 2081 | return -EINVAL; |
| 2082 | |
| 2083 | out_no_sec: |
| 2084 | dfprintk(MOUNT, "NFS: nfs_mount_data version supports only AUTH_SYS\n"); |
| 2085 | return -EINVAL; |
| 2086 | |
Cyrill Gorcunov | 63649bd | 2008-04-17 20:42:09 +0400 | [diff] [blame] | 2087 | out_nomem: |
| 2088 | dfprintk(MOUNT, "NFS: not enough memory to handle mount options\n"); |
| 2089 | return -ENOMEM; |
| 2090 | |
Chuck Lever | 5df36e7 | 2007-07-01 12:12:56 -0400 | [diff] [blame] | 2091 | out_no_address: |
| 2092 | dfprintk(MOUNT, "NFS: mount program didn't pass remote address\n"); |
| 2093 | return -EINVAL; |
| 2094 | |
| 2095 | out_invalid_fh: |
| 2096 | dfprintk(MOUNT, "NFS: invalid root filehandle\n"); |
| 2097 | return -EINVAL; |
David Howells | 54ceac4 | 2006-08-22 20:06:13 -0400 | [diff] [blame] | 2098 | } |
| 2099 | |
Bryan Schumaker | 89d77c8 | 2012-07-30 16:05:25 -0400 | [diff] [blame] | 2100 | #if IS_ENABLED(CONFIG_NFS_V4) |
Bryan Schumaker | d72c727 | 2012-05-10 15:07:41 -0400 | [diff] [blame] | 2101 | static 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 |
| 2112 | static 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 Schumaker | b72e4f4 | 2012-05-10 15:07:40 -0400 | [diff] [blame] | 2122 | static 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 Schumaker | 89d77c8 | 2012-07-30 16:05:25 -0400 | [diff] [blame] | 2138 | #if IS_ENABLED(CONFIG_NFS_V4) |
Bryan Schumaker | b72e4f4 | 2012-05-10 15:07:40 -0400 | [diff] [blame] | 2139 | port = NFS_PORT; |
| 2140 | max_namelen = NFS4_MAXNAMLEN; |
| 2141 | max_pathlen = NFS4_MAXPATHLEN; |
| 2142 | nfs_validate_transport_protocol(args); |
Trond Myklebust | 6da1a03 | 2013-08-07 12:30:52 -0400 | [diff] [blame] | 2143 | if (args->nfs_server.protocol == XPRT_TRANSPORT_UDP) |
| 2144 | goto out_invalid_transport_udp; |
Bryan Schumaker | b72e4f4 | 2012-05-10 15:07:40 -0400 | [diff] [blame] | 2145 | 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 Schumaker | b72e4f4 | 2012-05-10 15:07:40 -0400 | [diff] [blame] | 2154 | 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 Schumaker | 89d77c8 | 2012-07-30 16:05:25 -0400 | [diff] [blame] | 2160 | #if !IS_ENABLED(CONFIG_NFS_V4) |
Bryan Schumaker | b72e4f4 | 2012-05-10 15:07:40 -0400 | [diff] [blame] | 2161 | out_v4_not_compiled: |
| 2162 | dfprintk(MOUNT, "NFS: NFSv4 is not compiled into kernel\n"); |
| 2163 | return -EPROTONOSUPPORT; |
Trond Myklebust | 6da1a03 | 2013-08-07 12:30:52 -0400 | [diff] [blame] | 2164 | #else |
| 2165 | out_invalid_transport_udp: |
| 2166 | dfprintk(MOUNT, "NFSv4: Unsupported transport protocol udp\n"); |
| 2167 | return -EINVAL; |
Bryan Schumaker | b72e4f4 | 2012-05-10 15:07:40 -0400 | [diff] [blame] | 2168 | #endif /* !CONFIG_NFS_V4 */ |
| 2169 | |
| 2170 | out_no_address: |
| 2171 | dfprintk(MOUNT, "NFS: mount program didn't pass remote address\n"); |
| 2172 | return -EINVAL; |
Bryan Schumaker | b72e4f4 | 2012-05-10 15:07:40 -0400 | [diff] [blame] | 2173 | } |
| 2174 | |
Scott Mayhew | 71a6ec8 | 2014-08-04 17:37:27 -0400 | [diff] [blame] | 2175 | #define NFS_REMOUNT_CMP_FLAGMASK ~(NFS_MOUNT_INTR \ |
Scott Mayhew | c8e4702 | 2014-05-29 16:41:22 -0400 | [diff] [blame] | 2176 | | 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 Mayhew | c8e4702 | 2014-05-29 16:41:22 -0400 | [diff] [blame] | 2183 | | NFS_MOUNT_LEGACY_INTERFACE) |
| 2184 | |
Scott Mayhew | 71a6ec8 | 2014-08-04 17:37:27 -0400 | [diff] [blame] | 2185 | #define NFS_MOUNT_CMP_FLAGMASK (NFS_REMOUNT_CMP_FLAGMASK & \ |
| 2186 | ~(NFS_MOUNT_UNSHARED | NFS_MOUNT_NORESVPORT)) |
| 2187 | |
Jeff Layton | 48b605f | 2008-06-10 15:38:39 -0400 | [diff] [blame] | 2188 | static int |
| 2189 | nfs_compare_remount_data(struct nfs_server *nfss, |
| 2190 | struct nfs_parsed_mount_data *data) |
| 2191 | { |
Scott Mayhew | 71a6ec8 | 2014-08-04 17:37:27 -0400 | [diff] [blame] | 2192 | if ((data->flags ^ nfss->flags) & NFS_REMOUNT_CMP_FLAGMASK || |
Jeff Layton | 48b605f | 2008-06-10 15:38:39 -0400 | [diff] [blame] | 2193 | data->rsize != nfss->rsize || |
| 2194 | data->wsize != nfss->wsize || |
Jeff Layton | 57acc40 | 2013-10-18 10:03:37 -0400 | [diff] [blame] | 2195 | data->version != nfss->nfs_client->rpc_ops->version || |
| 2196 | data->minorversion != nfss->nfs_client->cl_minorversion || |
Jeff Layton | 48b605f | 2008-06-10 15:38:39 -0400 | [diff] [blame] | 2197 | data->retrans != nfss->client->cl_timeout->to_retries || |
Benjamin Coddington | 09a330f | 2014-12-05 21:52:49 -0500 | [diff] [blame] | 2198 | !nfs_auth_info_match(&data->auth_info, nfss->client->cl_auth->au_flavor) || |
Jeff Layton | 48b605f | 2008-06-10 15:38:39 -0400 | [diff] [blame] | 2199 | 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 Myklebust | bcd2ea1 | 2009-10-06 15:41:22 -0400 | [diff] [blame] | 2204 | data->nfs_server.port != nfss->port || |
Jeff Layton | 48b605f | 2008-06-10 15:38:39 -0400 | [diff] [blame] | 2205 | data->nfs_server.addrlen != nfss->nfs_client->cl_addrlen || |
Stefan Richter | a1be9ee | 2009-10-12 11:26:12 -0400 | [diff] [blame] | 2206 | !rpc_cmp_addr((struct sockaddr *)&data->nfs_server.address, |
| 2207 | (struct sockaddr *)&nfss->nfs_client->cl_addr)) |
Jeff Layton | 48b605f | 2008-06-10 15:38:39 -0400 | [diff] [blame] | 2208 | return -EINVAL; |
| 2209 | |
| 2210 | return 0; |
| 2211 | } |
| 2212 | |
Bryan Schumaker | fbdefd6 | 2012-07-16 16:39:20 -0400 | [diff] [blame] | 2213 | int |
Jeff Layton | 48b605f | 2008-06-10 15:38:39 -0400 | [diff] [blame] | 2214 | nfs_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 Myklebust | cd10072 | 2008-06-17 16:12:00 -0400 | [diff] [blame] | 2221 | u32 nfsvers = nfss->nfs_client->rpc_ops->version; |
Jeff Layton | 48b605f | 2008-06-10 15:38:39 -0400 | [diff] [blame] | 2222 | |
Theodore Ts'o | 02b9984 | 2014-03-13 10:14:33 -0400 | [diff] [blame] | 2223 | sync_filesystem(sb); |
| 2224 | |
Jeff Layton | 48b605f | 2008-06-10 15:38:39 -0400 | [diff] [blame] | 2225 | /* |
| 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 Zyngier | 31c9446 | 2008-07-17 13:21:55 +0200 | [diff] [blame] | 2231 | if ((nfsvers == 4 && (!options4 || options4->version == 1)) || |
| 2232 | (nfsvers <= 3 && (!options || (options->version >= 1 && |
| 2233 | options->version <= 6)))) |
Jeff Layton | 48b605f | 2008-06-10 15:38:39 -0400 | [diff] [blame] | 2234 | 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 Adamson | a3f73c2 | 2013-10-18 15:15:16 -0400 | [diff] [blame] | 2245 | data->selected_flavor = nfss->client->cl_auth->au_flavor; |
Jeff Layton | 48b605f | 2008-06-10 15:38:39 -0400 | [diff] [blame] | 2246 | 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 Myklebust | bcd2ea1 | 2009-10-06 15:41:22 -0400 | [diff] [blame] | 2251 | data->nfs_server.port = nfss->port; |
Jeff Layton | 48b605f | 2008-06-10 15:38:39 -0400 | [diff] [blame] | 2252 | data->nfs_server.addrlen = nfss->nfs_client->cl_addrlen; |
Jeff Layton | 57acc40 | 2013-10-18 10:03:37 -0400 | [diff] [blame] | 2253 | data->version = nfsvers; |
| 2254 | data->minorversion = nfss->nfs_client->cl_minorversion; |
Mateusz Guzik | a914722 | 2014-06-10 12:44:12 +0200 | [diff] [blame] | 2255 | data->net = current->nsproxy->net_ns; |
Jeff Layton | 48b605f | 2008-06-10 15:38:39 -0400 | [diff] [blame] | 2256 | 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 Layton | 1966903 | 2013-10-21 09:52:19 -0400 | [diff] [blame] | 2260 | error = -EINVAL; |
| 2261 | if (!nfs_parse_mount_options((char *)options, data)) |
Jeff Layton | 48b605f | 2008-06-10 15:38:39 -0400 | [diff] [blame] | 2262 | goto out; |
| 2263 | |
Jeff Layton | 26c4c17 | 2011-04-27 11:49:09 -0400 | [diff] [blame] | 2264 | /* |
| 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 Layton | 48b605f | 2008-06-10 15:38:39 -0400 | [diff] [blame] | 2273 | /* compare new mount options with old ones */ |
| 2274 | error = nfs_compare_remount_data(nfss, data); |
| 2275 | out: |
| 2276 | kfree(data); |
| 2277 | return error; |
| 2278 | } |
Bryan Schumaker | 89d77c8 | 2012-07-30 16:05:25 -0400 | [diff] [blame] | 2279 | EXPORT_SYMBOL_GPL(nfs_remount); |
Jeff Layton | 48b605f | 2008-06-10 15:38:39 -0400 | [diff] [blame] | 2280 | |
David Howells | 54ceac4 | 2006-08-22 20:06:13 -0400 | [diff] [blame] | 2281 | /* |
| 2282 | * Initialise the common bits of the superblock |
| 2283 | */ |
Bryan Schumaker | fbdefd6 | 2012-07-16 16:39:20 -0400 | [diff] [blame] | 2284 | inline void nfs_initialise_sb(struct super_block *sb) |
David Howells | 54ceac4 | 2006-08-22 20:06:13 -0400 | [diff] [blame] | 2285 | { |
| 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 Trivedi | 5a7c9ee | 2012-03-15 23:58:52 +0530 | [diff] [blame] | 2292 | "%u:%u", MAJOR(sb->s_dev), MINOR(sb->s_dev)); |
David Howells | 54ceac4 | 2006-08-22 20:06:13 -0400 | [diff] [blame] | 2293 | |
| 2294 | if (sb->s_blocksize == 0) |
| 2295 | sb->s_blocksize = nfs_block_bits(server->wsize, |
| 2296 | &sb->s_blocksize_bits); |
| 2297 | |
Jens Axboe | 32a88aa | 2009-09-16 15:02:33 +0200 | [diff] [blame] | 2298 | sb->s_bdi = &server->backing_dev_info; |
| 2299 | |
David Howells | 54ceac4 | 2006-08-22 20:06:13 -0400 | [diff] [blame] | 2300 | nfs_super_set_maxbytes(sb, server->maxfilesize); |
| 2301 | } |
| 2302 | |
| 2303 | /* |
| 2304 | * Finish setting up an NFS2/3 superblock |
| 2305 | */ |
Bryan Schumaker | fbdefd6 | 2012-07-16 16:39:20 -0400 | [diff] [blame] | 2306 | void nfs_fill_super(struct super_block *sb, struct nfs_mount_info *mount_info) |
David Howells | 54ceac4 | 2006-08-22 20:06:13 -0400 | [diff] [blame] | 2307 | { |
Bryan Schumaker | c40f8d1 | 2012-05-10 15:07:34 -0400 | [diff] [blame] | 2308 | struct nfs_parsed_mount_data *data = mount_info->parsed; |
David Howells | 54ceac4 | 2006-08-22 20:06:13 -0400 | [diff] [blame] | 2309 | struct nfs_server *server = NFS_SB(sb); |
| 2310 | |
| 2311 | sb->s_blocksize_bits = 0; |
| 2312 | sb->s_blocksize = 0; |
Bryan Schumaker | 6a74490 | 2012-07-30 16:05:20 -0400 | [diff] [blame] | 2313 | 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 Howells | 54ceac4 | 2006-08-22 20:06:13 -0400 | [diff] [blame] | 2316 | sb->s_blocksize = nfs_block_size(data->bsize, &sb->s_blocksize_bits); |
| 2317 | |
Bryan Schumaker | 6a74490 | 2012-07-30 16:05:20 -0400 | [diff] [blame] | 2318 | if (server->nfs_client->rpc_ops->version != 2) { |
David Howells | 54ceac4 | 2006-08-22 20:06:13 -0400 | [diff] [blame] | 2319 | /* 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 Howells | 54ceac4 | 2006-08-22 20:06:13 -0400 | [diff] [blame] | 2326 | nfs_initialise_sb(sb); |
| 2327 | } |
Bryan Schumaker | 89d77c8 | 2012-07-30 16:05:25 -0400 | [diff] [blame] | 2328 | EXPORT_SYMBOL_GPL(nfs_fill_super); |
David Howells | 54ceac4 | 2006-08-22 20:06:13 -0400 | [diff] [blame] | 2329 | |
| 2330 | /* |
Bryan Schumaker | 3cadf4b | 2012-07-16 16:39:19 -0400 | [diff] [blame] | 2331 | * Finish setting up a cloned NFS2/3/4 superblock |
David Howells | 54ceac4 | 2006-08-22 20:06:13 -0400 | [diff] [blame] | 2332 | */ |
Bryan Schumaker | fbdefd6 | 2012-07-16 16:39:20 -0400 | [diff] [blame] | 2333 | void nfs_clone_super(struct super_block *sb, struct nfs_mount_info *mount_info) |
David Howells | 54ceac4 | 2006-08-22 20:06:13 -0400 | [diff] [blame] | 2334 | { |
Bryan Schumaker | 8c958e0 | 2012-05-10 15:07:35 -0400 | [diff] [blame] | 2335 | const struct super_block *old_sb = mount_info->cloned->sb; |
David Howells | 54ceac4 | 2006-08-22 20:06:13 -0400 | [diff] [blame] | 2336 | 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 Schumaker | 3cadf4b | 2012-07-16 16:39:19 -0400 | [diff] [blame] | 2341 | sb->s_xattr = old_sb->s_xattr; |
| 2342 | sb->s_op = old_sb->s_op; |
| 2343 | sb->s_time_gran = 1; |
David Howells | 54ceac4 | 2006-08-22 20:06:13 -0400 | [diff] [blame] | 2344 | |
Bryan Schumaker | 3cadf4b | 2012-07-16 16:39:19 -0400 | [diff] [blame] | 2345 | if (server->nfs_client->rpc_ops->version != 2) { |
David Howells | 54ceac4 | 2006-08-22 20:06:13 -0400 | [diff] [blame] | 2346 | /* 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 Howells | 54ceac4 | 2006-08-22 20:06:13 -0400 | [diff] [blame] | 2350 | } |
| 2351 | |
David Howells | 54ceac4 | 2006-08-22 20:06:13 -0400 | [diff] [blame] | 2352 | nfs_initialise_sb(sb); |
| 2353 | } |
| 2354 | |
Trond Myklebust | 275a5d2 | 2007-05-16 16:53:28 -0400 | [diff] [blame] | 2355 | static 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 Myklebust | 0aea92b | 2013-09-07 18:28:10 -0400 | [diff] [blame] | 2365 | if ((a->flags ^ b->flags) & NFS_MOUNT_CMP_FLAGMASK) |
Trond Myklebust | 275a5d2 | 2007-05-16 16:53:28 -0400 | [diff] [blame] | 2366 | 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 Adamson | 5837f6d | 2013-10-18 15:15:18 -0400 | [diff] [blame] | 2379 | if (b->auth_info.flavor_len > 0 && |
Trond Myklebust | 0aea92b | 2013-09-07 18:28:10 -0400 | [diff] [blame] | 2380 | clnt_a->cl_auth->au_flavor != clnt_b->cl_auth->au_flavor) |
Trond Myklebust | 275a5d2 | 2007-05-16 16:53:28 -0400 | [diff] [blame] | 2381 | goto Ebusy; |
Trond Myklebust | e89a5a4 | 2007-08-31 10:45:17 -0400 | [diff] [blame] | 2382 | return 1; |
Trond Myklebust | 275a5d2 | 2007-05-16 16:53:28 -0400 | [diff] [blame] | 2383 | Ebusy: |
Trond Myklebust | e89a5a4 | 2007-08-31 10:45:17 -0400 | [diff] [blame] | 2384 | return 0; |
| 2385 | } |
| 2386 | |
| 2387 | struct nfs_sb_mountdata { |
| 2388 | struct nfs_server *server; |
| 2389 | int mntflags; |
| 2390 | }; |
| 2391 | |
| 2392 | static 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 Viro | 8b244ff | 2010-12-18 11:29:39 -0500 | [diff] [blame] | 2400 | s->s_d_op = server->nfs_client->rpc_ops->dentry_ops; |
Trond Myklebust | e89a5a4 | 2007-08-31 10:45:17 -0400 | [diff] [blame] | 2401 | ret = set_anon_super(s, server); |
| 2402 | if (ret == 0) |
| 2403 | server->s_dev = s->s_dev; |
| 2404 | return ret; |
| 2405 | } |
| 2406 | |
Chuck Lever | fd00a8f | 2007-12-10 14:57:38 -0500 | [diff] [blame] | 2407 | static 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 Myklebust | e89a5a4 | 2007-08-31 10:45:17 -0400 | [diff] [blame] | 2444 | static 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 Lever | fd00a8f | 2007-12-10 14:57:38 -0500 | [diff] [blame] | 2450 | if (!nfs_compare_super_address(old, server)) |
Trond Myklebust | e89a5a4 | 2007-08-31 10:45:17 -0400 | [diff] [blame] | 2451 | 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 Myklebust | 275a5d2 | 2007-05-16 16:53:28 -0400 | [diff] [blame] | 2458 | } |
| 2459 | |
Trond Myklebust | 39ffb92 | 2012-05-16 10:21:30 -0700 | [diff] [blame] | 2460 | #ifdef CONFIG_NFS_FSCACHE |
Bryan Schumaker | 2311b94 | 2012-05-10 15:07:32 -0400 | [diff] [blame] | 2461 | static void nfs_get_cache_cookie(struct super_block *sb, |
| 2462 | struct nfs_parsed_mount_data *parsed, |
| 2463 | struct nfs_clone_mount *cloned) |
| 2464 | { |
Trond Myklebust | c4271c6 | 2012-12-21 11:02:32 -0500 | [diff] [blame] | 2465 | struct nfs_server *nfss = NFS_SB(sb); |
Bryan Schumaker | 2311b94 | 2012-05-10 15:07:32 -0400 | [diff] [blame] | 2466 | char *uniq = NULL; |
| 2467 | int ulen = 0; |
| 2468 | |
Trond Myklebust | c4271c6 | 2012-12-21 11:02:32 -0500 | [diff] [blame] | 2469 | 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 Schumaker | 2311b94 | 2012-05-10 15:07:32 -0400 | [diff] [blame] | 2479 | } else if (cloned) { |
| 2480 | struct nfs_server *mnt_s = NFS_SB(cloned->sb); |
Trond Myklebust | c4271c6 | 2012-12-21 11:02:32 -0500 | [diff] [blame] | 2481 | if (!(mnt_s->options & NFS_OPTION_FSCACHE)) |
| 2482 | return; |
Bryan Schumaker | 2311b94 | 2012-05-10 15:07:32 -0400 | [diff] [blame] | 2483 | if (mnt_s->fscache_key) { |
| 2484 | uniq = mnt_s->fscache_key->key.uniquifier; |
| 2485 | ulen = mnt_s->fscache_key->key.uniq_len; |
| 2486 | }; |
Trond Myklebust | c4271c6 | 2012-12-21 11:02:32 -0500 | [diff] [blame] | 2487 | } else |
| 2488 | return; |
Bryan Schumaker | 2311b94 | 2012-05-10 15:07:32 -0400 | [diff] [blame] | 2489 | |
| 2490 | nfs_fscache_get_super_cookie(sb, uniq, ulen); |
| 2491 | } |
Trond Myklebust | 39ffb92 | 2012-05-16 10:21:30 -0700 | [diff] [blame] | 2492 | #else |
| 2493 | static 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 Schumaker | 2311b94 | 2012-05-10 15:07:32 -0400 | [diff] [blame] | 2499 | |
Miklos Szeredi | fa79975 | 2008-04-30 00:54:33 -0700 | [diff] [blame] | 2500 | static int nfs_bdi_register(struct nfs_server *server) |
| 2501 | { |
| 2502 | return bdi_register_dev(&server->backing_dev_info, server->s_dev); |
| 2503 | } |
| 2504 | |
Bryan Schumaker | fbdefd6 | 2012-07-16 16:39:20 -0400 | [diff] [blame] | 2505 | int nfs_set_sb_security(struct super_block *s, struct dentry *mntroot, |
| 2506 | struct nfs_mount_info *mount_info) |
Bryan Schumaker | 3d176e3 | 2012-05-10 15:07:36 -0400 | [diff] [blame] | 2507 | { |
David Quigley | aa9c266 | 2013-05-22 12:50:44 -0400 | [diff] [blame] | 2508 | 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; |
| 2521 | err: |
| 2522 | return error; |
Bryan Schumaker | 3d176e3 | 2012-05-10 15:07:36 -0400 | [diff] [blame] | 2523 | } |
Bryan Schumaker | 89d77c8 | 2012-07-30 16:05:25 -0400 | [diff] [blame] | 2524 | EXPORT_SYMBOL_GPL(nfs_set_sb_security); |
Bryan Schumaker | 3d176e3 | 2012-05-10 15:07:36 -0400 | [diff] [blame] | 2525 | |
Bryan Schumaker | fbdefd6 | 2012-07-16 16:39:20 -0400 | [diff] [blame] | 2526 | int nfs_clone_sb_security(struct super_block *s, struct dentry *mntroot, |
| 2527 | struct nfs_mount_info *mount_info) |
Bryan Schumaker | 3d176e3 | 2012-05-10 15:07:36 -0400 | [diff] [blame] | 2528 | { |
| 2529 | /* clone any lsm security options from the parent to the new sb */ |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 2530 | if (d_inode(mntroot)->i_op != NFS_SB(s)->nfs_client->rpc_ops->dir_inode_ops) |
Bryan Schumaker | 3d176e3 | 2012-05-10 15:07:36 -0400 | [diff] [blame] | 2531 | return -ESTALE; |
Jeff Layton | 094f7b6 | 2013-04-01 08:14:24 -0400 | [diff] [blame] | 2532 | return security_sb_clone_mnt_opts(mount_info->cloned->sb, s); |
Bryan Schumaker | 3d176e3 | 2012-05-10 15:07:36 -0400 | [diff] [blame] | 2533 | } |
Bryan Schumaker | 89d77c8 | 2012-07-30 16:05:25 -0400 | [diff] [blame] | 2534 | EXPORT_SYMBOL_GPL(nfs_clone_sb_security); |
Bryan Schumaker | 3d176e3 | 2012-05-10 15:07:36 -0400 | [diff] [blame] | 2535 | |
Bryan Schumaker | ab7017a | 2012-07-30 16:05:16 -0400 | [diff] [blame] | 2536 | struct dentry *nfs_fs_mount_common(struct nfs_server *server, |
Bryan Schumaker | fbdefd6 | 2012-07-16 16:39:20 -0400 | [diff] [blame] | 2537 | int flags, const char *dev_name, |
Bryan Schumaker | ab7017a | 2012-07-30 16:05:16 -0400 | [diff] [blame] | 2538 | struct nfs_mount_info *mount_info, |
| 2539 | struct nfs_subversion *nfs_mod) |
David Howells | 54ceac4 | 2006-08-22 20:06:13 -0400 | [diff] [blame] | 2540 | { |
David Howells | 54ceac4 | 2006-08-22 20:06:13 -0400 | [diff] [blame] | 2541 | struct super_block *s; |
Al Viro | 0119498 | 2011-03-16 07:25:36 -0400 | [diff] [blame] | 2542 | struct dentry *mntroot = ERR_PTR(-ENOMEM); |
Trond Myklebust | 75180df | 2007-05-16 16:53:28 -0400 | [diff] [blame] | 2543 | int (*compare_super)(struct super_block *, void *) = nfs_compare_super; |
Trond Myklebust | e89a5a4 | 2007-08-31 10:45:17 -0400 | [diff] [blame] | 2544 | struct nfs_sb_mountdata sb_mntdata = { |
| 2545 | .mntflags = flags, |
Bryan Schumaker | c40f8d1 | 2012-05-10 15:07:34 -0400 | [diff] [blame] | 2546 | .server = server, |
Trond Myklebust | e89a5a4 | 2007-08-31 10:45:17 -0400 | [diff] [blame] | 2547 | }; |
Al Viro | 0119498 | 2011-03-16 07:25:36 -0400 | [diff] [blame] | 2548 | int error; |
David Howells | 54ceac4 | 2006-08-22 20:06:13 -0400 | [diff] [blame] | 2549 | |
Trond Myklebust | 75180df | 2007-05-16 16:53:28 -0400 | [diff] [blame] | 2550 | if (server->flags & NFS_MOUNT_UNSHARED) |
| 2551 | compare_super = NULL; |
| 2552 | |
Sachin Prabhu | fb2088c | 2011-08-01 12:10:12 +0100 | [diff] [blame] | 2553 | /* -o noac implies -o sync */ |
| 2554 | if (server->flags & NFS_MOUNT_NOAC) |
| 2555 | sb_mntdata.mntflags |= MS_SYNCHRONOUS; |
| 2556 | |
Scott Mayhew | e890db0 | 2013-07-31 10:01:41 -0400 | [diff] [blame] | 2557 | 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 Howells | 54ceac4 | 2006-08-22 20:06:13 -0400 | [diff] [blame] | 2561 | /* Get a superblock - note that we may end up sharing one that already exists */ |
Bryan Schumaker | ab7017a | 2012-07-30 16:05:16 -0400 | [diff] [blame] | 2562 | s = sget(nfs_mod->nfs_fs, compare_super, nfs_set_super, flags, &sb_mntdata); |
Trond Myklebust | 816724e | 2006-06-24 08:41:41 -0400 | [diff] [blame] | 2563 | if (IS_ERR(s)) { |
Al Viro | 0119498 | 2011-03-16 07:25:36 -0400 | [diff] [blame] | 2564 | mntroot = ERR_CAST(s); |
David Howells | 54ceac4 | 2006-08-22 20:06:13 -0400 | [diff] [blame] | 2565 | goto out_err_nosb; |
Trond Myklebust | 816724e | 2006-06-24 08:41:41 -0400 | [diff] [blame] | 2566 | } |
| 2567 | |
David Howells | 54ceac4 | 2006-08-22 20:06:13 -0400 | [diff] [blame] | 2568 | if (s->s_fs_info != server) { |
| 2569 | nfs_free_server(server); |
| 2570 | server = NULL; |
Miklos Szeredi | fa79975 | 2008-04-30 00:54:33 -0700 | [diff] [blame] | 2571 | } else { |
| 2572 | error = nfs_bdi_register(server); |
Al Viro | 0119498 | 2011-03-16 07:25:36 -0400 | [diff] [blame] | 2573 | if (error) { |
| 2574 | mntroot = ERR_PTR(error); |
Christoph Hellwig | 7b14a21 | 2015-01-14 10:42:39 +0100 | [diff] [blame] | 2575 | goto error_splat_super; |
Al Viro | 0119498 | 2011-03-16 07:25:36 -0400 | [diff] [blame] | 2576 | } |
Chuck Lever | ce6cda1 | 2013-10-17 14:12:56 -0400 | [diff] [blame] | 2577 | server->super = s; |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 2578 | } |
David Howells | 54ceac4 | 2006-08-22 20:06:13 -0400 | [diff] [blame] | 2579 | |
| 2580 | if (!s->s_root) { |
| 2581 | /* initial superblock/root creation */ |
Bryan Schumaker | c40f8d1 | 2012-05-10 15:07:34 -0400 | [diff] [blame] | 2582 | mount_info->fill_super(s, mount_info); |
Bryan Schumaker | 3d176e3 | 2012-05-10 15:07:36 -0400 | [diff] [blame] | 2583 | nfs_get_cache_cookie(s, mount_info->parsed, mount_info->cloned); |
David Howells | 54ceac4 | 2006-08-22 20:06:13 -0400 | [diff] [blame] | 2584 | } |
| 2585 | |
Bryan Schumaker | 87c7083 | 2012-05-10 15:07:43 -0400 | [diff] [blame] | 2586 | mntroot = nfs_get_root(s, mount_info->mntfh, dev_name); |
Al Viro | 0119498 | 2011-03-16 07:25:36 -0400 | [diff] [blame] | 2587 | if (IS_ERR(mntroot)) |
David Howells | 54ceac4 | 2006-08-22 20:06:13 -0400 | [diff] [blame] | 2588 | goto error_splat_super; |
David Howells | 54ceac4 | 2006-08-22 20:06:13 -0400 | [diff] [blame] | 2589 | |
Bryan Schumaker | 3d176e3 | 2012-05-10 15:07:36 -0400 | [diff] [blame] | 2590 | error = mount_info->set_security(s, mntroot, mount_info); |
Eric Paris | f9c3a38 | 2008-03-05 14:20:18 -0500 | [diff] [blame] | 2591 | if (error) |
| 2592 | goto error_splat_root; |
| 2593 | |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 2594 | s->s_flags |= MS_ACTIVE; |
Chuck Lever | 0655960 | 2007-07-01 12:12:35 -0400 | [diff] [blame] | 2595 | |
| 2596 | out: |
Al Viro | 0119498 | 2011-03-16 07:25:36 -0400 | [diff] [blame] | 2597 | return mntroot; |
Trond Myklebust | 816724e | 2006-06-24 08:41:41 -0400 | [diff] [blame] | 2598 | |
David Howells | 54ceac4 | 2006-08-22 20:06:13 -0400 | [diff] [blame] | 2599 | out_err_nosb: |
| 2600 | nfs_free_server(server); |
Chuck Lever | 0655960 | 2007-07-01 12:12:35 -0400 | [diff] [blame] | 2601 | goto out; |
David Howells | 54ceac4 | 2006-08-22 20:06:13 -0400 | [diff] [blame] | 2602 | |
Eric Paris | f9c3a38 | 2008-03-05 14:20:18 -0500 | [diff] [blame] | 2603 | error_splat_root: |
| 2604 | dput(mntroot); |
Al Viro | 0119498 | 2011-03-16 07:25:36 -0400 | [diff] [blame] | 2605 | mntroot = ERR_PTR(error); |
David Howells | 54ceac4 | 2006-08-22 20:06:13 -0400 | [diff] [blame] | 2606 | error_splat_super: |
Al Viro | 6f5bbff | 2009-05-06 01:34:22 -0400 | [diff] [blame] | 2607 | deactivate_locked_super(s); |
Chuck Lever | 0655960 | 2007-07-01 12:12:35 -0400 | [diff] [blame] | 2608 | goto out; |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 2609 | } |
Bryan Schumaker | 89d77c8 | 2012-07-30 16:05:25 -0400 | [diff] [blame] | 2610 | EXPORT_SYMBOL_GPL(nfs_fs_mount_common); |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 2611 | |
Bryan Schumaker | fbdefd6 | 2012-07-16 16:39:20 -0400 | [diff] [blame] | 2612 | struct dentry *nfs_fs_mount(struct file_system_type *fs_type, |
Bryan Schumaker | c40f8d1 | 2012-05-10 15:07:34 -0400 | [diff] [blame] | 2613 | int flags, const char *dev_name, void *raw_data) |
| 2614 | { |
Bryan Schumaker | c40f8d1 | 2012-05-10 15:07:34 -0400 | [diff] [blame] | 2615 | struct nfs_mount_info mount_info = { |
| 2616 | .fill_super = nfs_fill_super, |
Bryan Schumaker | 3d176e3 | 2012-05-10 15:07:36 -0400 | [diff] [blame] | 2617 | .set_security = nfs_set_sb_security, |
Bryan Schumaker | c40f8d1 | 2012-05-10 15:07:34 -0400 | [diff] [blame] | 2618 | }; |
Bryan Schumaker | c40f8d1 | 2012-05-10 15:07:34 -0400 | [diff] [blame] | 2619 | struct dentry *mntroot = ERR_PTR(-ENOMEM); |
Bryan Schumaker | ab7017a | 2012-07-30 16:05:16 -0400 | [diff] [blame] | 2620 | struct nfs_subversion *nfs_mod; |
Bryan Schumaker | c40f8d1 | 2012-05-10 15:07:34 -0400 | [diff] [blame] | 2621 | int error; |
| 2622 | |
Bryan Schumaker | 46058d4 | 2012-05-10 15:07:42 -0400 | [diff] [blame] | 2623 | mount_info.parsed = nfs_alloc_parsed_mount_data(); |
Bryan Schumaker | 87c7083 | 2012-05-10 15:07:43 -0400 | [diff] [blame] | 2624 | mount_info.mntfh = nfs_alloc_fhandle(); |
| 2625 | if (mount_info.parsed == NULL || mount_info.mntfh == NULL) |
Bryan Schumaker | c40f8d1 | 2012-05-10 15:07:34 -0400 | [diff] [blame] | 2626 | goto out; |
| 2627 | |
| 2628 | /* Validate the mount data */ |
Bryan Schumaker | 87c7083 | 2012-05-10 15:07:43 -0400 | [diff] [blame] | 2629 | error = nfs_validate_mount_data(fs_type, raw_data, mount_info.parsed, mount_info.mntfh, dev_name); |
Bryan Schumaker | b72e4f4 | 2012-05-10 15:07:40 -0400 | [diff] [blame] | 2630 | if (error == NFS_TEXT_DATA) |
Bryan Schumaker | 46058d4 | 2012-05-10 15:07:42 -0400 | [diff] [blame] | 2631 | error = nfs_validate_text_mount_data(raw_data, mount_info.parsed, dev_name); |
Bryan Schumaker | c40f8d1 | 2012-05-10 15:07:34 -0400 | [diff] [blame] | 2632 | if (error < 0) { |
| 2633 | mntroot = ERR_PTR(error); |
| 2634 | goto out; |
| 2635 | } |
Bryan Schumaker | c40f8d1 | 2012-05-10 15:07:34 -0400 | [diff] [blame] | 2636 | |
Bryan Schumaker | ab7017a | 2012-07-30 16:05:16 -0400 | [diff] [blame] | 2637 | 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 Schumaker | ff9099f2 | 2012-07-30 16:05:18 -0400 | [diff] [blame] | 2643 | mntroot = nfs_mod->rpc_ops->try_mount(flags, dev_name, &mount_info, nfs_mod); |
Bryan Schumaker | ab7017a | 2012-07-30 16:05:16 -0400 | [diff] [blame] | 2644 | |
| 2645 | put_nfs_version(nfs_mod); |
Bryan Schumaker | c40f8d1 | 2012-05-10 15:07:34 -0400 | [diff] [blame] | 2646 | out: |
Bryan Schumaker | 46058d4 | 2012-05-10 15:07:42 -0400 | [diff] [blame] | 2647 | nfs_free_parsed_mount_data(mount_info.parsed); |
Bryan Schumaker | 87c7083 | 2012-05-10 15:07:43 -0400 | [diff] [blame] | 2648 | nfs_free_fhandle(mount_info.mntfh); |
Bryan Schumaker | c40f8d1 | 2012-05-10 15:07:34 -0400 | [diff] [blame] | 2649 | return mntroot; |
| 2650 | } |
Bryan Schumaker | 89d77c8 | 2012-07-30 16:05:25 -0400 | [diff] [blame] | 2651 | EXPORT_SYMBOL_GPL(nfs_fs_mount); |
Bryan Schumaker | c40f8d1 | 2012-05-10 15:07:34 -0400 | [diff] [blame] | 2652 | |
David Howells | 54ceac4 | 2006-08-22 20:06:13 -0400 | [diff] [blame] | 2653 | /* |
| 2654 | * Destroy an NFS2/3 superblock |
| 2655 | */ |
Bryan Schumaker | fbdefd6 | 2012-07-16 16:39:20 -0400 | [diff] [blame] | 2656 | void nfs_kill_super(struct super_block *s) |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 2657 | { |
| 2658 | struct nfs_server *server = NFS_SB(s); |
Christoph Hellwig | 7b14a21 | 2015-01-14 10:42:39 +0100 | [diff] [blame] | 2659 | dev_t dev = s->s_dev; |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 2660 | |
Christoph Hellwig | 7b14a21 | 2015-01-14 10:42:39 +0100 | [diff] [blame] | 2661 | generic_shutdown_super(s); |
| 2662 | |
David Howells | 0873404 | 2009-04-03 16:42:42 +0100 | [diff] [blame] | 2663 | nfs_fscache_release_super_cookie(s); |
Christoph Hellwig | 7b14a21 | 2015-01-14 10:42:39 +0100 | [diff] [blame] | 2664 | |
David Howells | 54ceac4 | 2006-08-22 20:06:13 -0400 | [diff] [blame] | 2665 | nfs_free_server(server); |
Christoph Hellwig | 7b14a21 | 2015-01-14 10:42:39 +0100 | [diff] [blame] | 2666 | free_anon_bdev(dev); |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 2667 | } |
Bryan Schumaker | 89d77c8 | 2012-07-30 16:05:25 -0400 | [diff] [blame] | 2668 | EXPORT_SYMBOL_GPL(nfs_kill_super); |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 2669 | |
David Howells | 54ceac4 | 2006-08-22 20:06:13 -0400 | [diff] [blame] | 2670 | /* |
Bryan Schumaker | 8c958e0 | 2012-05-10 15:07:35 -0400 | [diff] [blame] | 2671 | * Clone an NFS2/3/4 server record on xdev traversal (FSID-change) |
David Howells | 54ceac4 | 2006-08-22 20:06:13 -0400 | [diff] [blame] | 2672 | */ |
Stanislav Kinsbursky | 3dd4f8ef | 2012-10-02 14:19:04 +0400 | [diff] [blame] | 2673 | static struct dentry * |
Bryan Schumaker | e8f25e6 | 2012-07-30 16:05:17 -0400 | [diff] [blame] | 2674 | nfs_xdev_mount(struct file_system_type *fs_type, int flags, |
| 2675 | const char *dev_name, void *raw_data) |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 2676 | { |
Bryan Schumaker | e8f25e6 | 2012-07-30 16:05:17 -0400 | [diff] [blame] | 2677 | 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 Howells | 54ceac4 | 2006-08-22 20:06:13 -0400 | [diff] [blame] | 2683 | struct nfs_server *server; |
Bryan Schumaker | 3d176e3 | 2012-05-10 15:07:36 -0400 | [diff] [blame] | 2684 | struct dentry *mntroot = ERR_PTR(-ENOMEM); |
Bryan Schumaker | ab7017a | 2012-07-30 16:05:16 -0400 | [diff] [blame] | 2685 | struct nfs_subversion *nfs_mod = NFS_SB(data->sb)->nfs_client->cl_nfs_mod; |
David Howells | 54ceac4 | 2006-08-22 20:06:13 -0400 | [diff] [blame] | 2686 | |
Trond Myklebust | dee972b | 2013-01-16 15:05:44 -0500 | [diff] [blame] | 2687 | dprintk("--> nfs_xdev_mount()\n"); |
David Howells | 54ceac4 | 2006-08-22 20:06:13 -0400 | [diff] [blame] | 2688 | |
Bryan Schumaker | e8f25e6 | 2012-07-30 16:05:17 -0400 | [diff] [blame] | 2689 | mount_info.mntfh = mount_info.cloned->fh; |
Bryan Schumaker | 87c7083 | 2012-05-10 15:07:43 -0400 | [diff] [blame] | 2690 | |
David Howells | 54ceac4 | 2006-08-22 20:06:13 -0400 | [diff] [blame] | 2691 | /* create a new volume representation */ |
Bryan Schumaker | 1179acc | 2012-07-30 16:05:19 -0400 | [diff] [blame] | 2692 | server = nfs_mod->rpc_ops->clone_server(NFS_SB(data->sb), data->fh, data->fattr, data->authflavor); |
David Howells | 54ceac4 | 2006-08-22 20:06:13 -0400 | [diff] [blame] | 2693 | |
Trond Myklebust | dee972b | 2013-01-16 15:05:44 -0500 | [diff] [blame] | 2694 | 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 Viro | 31f4347 | 2010-10-29 03:38:12 -0400 | [diff] [blame] | 2702 | return mntroot; |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 2703 | } |
| 2704 | |
Bryan Schumaker | 89d77c8 | 2012-07-30 16:05:25 -0400 | [diff] [blame] | 2705 | #if IS_ENABLED(CONFIG_NFS_V4) |
David Howells | 54ceac4 | 2006-08-22 20:06:13 -0400 | [diff] [blame] | 2706 | |
Trond Myklebust | 01c3f05 | 2009-06-17 13:22:58 -0700 | [diff] [blame] | 2707 | static void nfs4_validate_mount_flags(struct nfs_parsed_mount_data *args) |
| 2708 | { |
Suresh Jayaraman | 5eebde2 | 2010-09-23 08:55:58 -0400 | [diff] [blame] | 2709 | args->flags &= ~(NFS_MOUNT_NONLM|NFS_MOUNT_NOACL|NFS_MOUNT_VER3| |
| 2710 | NFS_MOUNT_LOCAL_FLOCK|NFS_MOUNT_LOCAL_FCNTL); |
Trond Myklebust | 01c3f05 | 2009-06-17 13:22:58 -0700 | [diff] [blame] | 2711 | } |
| 2712 | |
David Howells | 54ceac4 | 2006-08-22 20:06:13 -0400 | [diff] [blame] | 2713 | /* |
Chuck Lever | f0768eb | 2007-07-01 12:13:01 -0400 | [diff] [blame] | 2714 | * Validate NFSv4 mount options |
| 2715 | */ |
\"Talpey, Thomas\ | 91ea40b | 2007-09-10 13:44:33 -0400 | [diff] [blame] | 2716 | static int nfs4_validate_mount_data(void *options, |
| 2717 | struct nfs_parsed_mount_data *args, |
| 2718 | const char *dev_name) |
Chuck Lever | f0768eb | 2007-07-01 12:13:01 -0400 | [diff] [blame] | 2719 | { |
Chuck Lever | 4cfd74f | 2009-09-08 19:49:47 -0400 | [diff] [blame] | 2720 | struct sockaddr *sap = (struct sockaddr *)&args->nfs_server.address; |
\"Talpey, Thomas\ | 91ea40b | 2007-09-10 13:44:33 -0400 | [diff] [blame] | 2721 | struct nfs4_mount_data *data = (struct nfs4_mount_data *)options; |
Chuck Lever | f0768eb | 2007-07-01 12:13:01 -0400 | [diff] [blame] | 2722 | char *c; |
| 2723 | |
| 2724 | if (data == NULL) |
| 2725 | goto out_no_data; |
| 2726 | |
Bryan Schumaker | cdf6644 | 2012-06-05 14:59:54 -0400 | [diff] [blame] | 2727 | args->version = 4; |
| 2728 | |
Chuck Lever | f0768eb | 2007-07-01 12:13:01 -0400 | [diff] [blame] | 2729 | switch (data->version) { |
| 2730 | case 1: |
Chuck Lever | 4c56801 | 2007-12-10 14:59:28 -0500 | [diff] [blame] | 2731 | if (data->host_addrlen > sizeof(args->nfs_server.address)) |
Chuck Lever | f0768eb | 2007-07-01 12:13:01 -0400 | [diff] [blame] | 2732 | goto out_no_address; |
Chuck Lever | 4c56801 | 2007-12-10 14:59:28 -0500 | [diff] [blame] | 2733 | if (data->host_addrlen == 0) |
| 2734 | goto out_no_address; |
| 2735 | args->nfs_server.addrlen = data->host_addrlen; |
Chuck Lever | 4cfd74f | 2009-09-08 19:49:47 -0400 | [diff] [blame] | 2736 | if (copy_from_user(sap, data->host_addr, data->host_addrlen)) |
Chuck Lever | f0768eb | 2007-07-01 12:13:01 -0400 | [diff] [blame] | 2737 | return -EFAULT; |
Chuck Lever | 4cfd74f | 2009-09-08 19:49:47 -0400 | [diff] [blame] | 2738 | if (!nfs_verify_server_address(sap)) |
Chuck Lever | f0768eb | 2007-07-01 12:13:01 -0400 | [diff] [blame] | 2739 | goto out_no_address; |
Trond Myklebust | 872ece8 | 2012-09-04 11:05:07 -0400 | [diff] [blame] | 2740 | args->nfs_server.port = ntohs(((struct sockaddr_in *)sap)->sin_port); |
Chuck Lever | f0768eb | 2007-07-01 12:13:01 -0400 | [diff] [blame] | 2741 | |
Chuck Lever | 6738b25 | 2008-06-24 16:33:54 -0400 | [diff] [blame] | 2742 | if (data->auth_flavourlen) { |
Trond Myklebust | 74c9881 | 2013-09-07 13:26:57 -0400 | [diff] [blame] | 2743 | rpc_authflavor_t pseudoflavor; |
Chuck Lever | 6738b25 | 2008-06-24 16:33:54 -0400 | [diff] [blame] | 2744 | if (data->auth_flavourlen > 1) |
| 2745 | goto out_inval_auth; |
Trond Myklebust | 74c9881 | 2013-09-07 13:26:57 -0400 | [diff] [blame] | 2746 | if (copy_from_user(&pseudoflavor, |
\"Talpey, Thomas\ | 91ea40b | 2007-09-10 13:44:33 -0400 | [diff] [blame] | 2747 | data->auth_flavours, |
Trond Myklebust | 74c9881 | 2013-09-07 13:26:57 -0400 | [diff] [blame] | 2748 | sizeof(pseudoflavor))) |
Chuck Lever | f0768eb | 2007-07-01 12:13:01 -0400 | [diff] [blame] | 2749 | return -EFAULT; |
Weston Andros Adamson | a3f73c2 | 2013-10-18 15:15:16 -0400 | [diff] [blame] | 2750 | args->selected_flavor = pseudoflavor; |
Trond Myklebust | 74c9881 | 2013-09-07 13:26:57 -0400 | [diff] [blame] | 2751 | } else |
Weston Andros Adamson | a3f73c2 | 2013-10-18 15:15:16 -0400 | [diff] [blame] | 2752 | args->selected_flavor = RPC_AUTH_UNIX; |
Chuck Lever | f0768eb | 2007-07-01 12:13:01 -0400 | [diff] [blame] | 2753 | |
| 2754 | c = strndup_user(data->hostname.data, NFS4_MAXNAMLEN); |
| 2755 | if (IS_ERR(c)) |
| 2756 | return PTR_ERR(c); |
\"Talpey, Thomas\ | 91ea40b | 2007-09-10 13:44:33 -0400 | [diff] [blame] | 2757 | args->nfs_server.hostname = c; |
Chuck Lever | f0768eb | 2007-07-01 12:13:01 -0400 | [diff] [blame] | 2758 | |
| 2759 | c = strndup_user(data->mnt_path.data, NFS4_MAXPATHLEN); |
| 2760 | if (IS_ERR(c)) |
| 2761 | return PTR_ERR(c); |
\"Talpey, Thomas\ | 91ea40b | 2007-09-10 13:44:33 -0400 | [diff] [blame] | 2762 | args->nfs_server.export_path = c; |
| 2763 | dfprintk(MOUNT, "NFS: MNTPATH: '%s'\n", c); |
Chuck Lever | f0768eb | 2007-07-01 12:13:01 -0400 | [diff] [blame] | 2764 | |
| 2765 | c = strndup_user(data->client_addr.data, 16); |
| 2766 | if (IS_ERR(c)) |
| 2767 | return PTR_ERR(c); |
\"Talpey, Thomas\ | 91ea40b | 2007-09-10 13:44:33 -0400 | [diff] [blame] | 2768 | 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 Myklebust | 259875e | 2008-07-02 14:43:47 -0400 | [diff] [blame] | 2785 | nfs_validate_transport_protocol(args); |
Trond Myklebust | 6da1a03 | 2013-08-07 12:30:52 -0400 | [diff] [blame] | 2786 | if (args->nfs_server.protocol == XPRT_TRANSPORT_UDP) |
| 2787 | goto out_invalid_transport_udp; |
Chuck Lever | f0768eb | 2007-07-01 12:13:01 -0400 | [diff] [blame] | 2788 | |
| 2789 | break; |
Chuck Lever | 7630c85 | 2009-09-08 19:49:57 -0400 | [diff] [blame] | 2790 | default: |
Bryan Schumaker | b72e4f4 | 2012-05-10 15:07:40 -0400 | [diff] [blame] | 2791 | return NFS_TEXT_DATA; |
Chuck Lever | f0768eb | 2007-07-01 12:13:01 -0400 | [diff] [blame] | 2792 | } |
| 2793 | |
| 2794 | return 0; |
| 2795 | |
| 2796 | out_no_data: |
| 2797 | dfprintk(MOUNT, "NFS4: mount program didn't pass any mount data\n"); |
| 2798 | return -EINVAL; |
| 2799 | |
| 2800 | out_inval_auth: |
| 2801 | dfprintk(MOUNT, "NFS4: Invalid number of RPC auth flavours %d\n", |
| 2802 | data->auth_flavourlen); |
| 2803 | return -EINVAL; |
| 2804 | |
| 2805 | out_no_address: |
| 2806 | dfprintk(MOUNT, "NFS4: mount program didn't pass remote address\n"); |
| 2807 | return -EINVAL; |
Trond Myklebust | 6da1a03 | 2013-08-07 12:30:52 -0400 | [diff] [blame] | 2808 | |
| 2809 | out_invalid_transport_udp: |
| 2810 | dfprintk(MOUNT, "NFSv4: Unsupported transport protocol udp\n"); |
| 2811 | return -EINVAL; |
Chuck Lever | f0768eb | 2007-07-01 12:13:01 -0400 | [diff] [blame] | 2812 | } |
| 2813 | |
Bryan Schumaker | fac1e8e | 2012-07-30 16:05:22 -0400 | [diff] [blame] | 2814 | /* |
| 2815 | * NFS v4 module parameters need to stay in the |
| 2816 | * NFS client for backwards compatibility |
| 2817 | */ |
| 2818 | unsigned int nfs_callback_set_tcpport; |
| 2819 | unsigned short nfs_callback_tcpport; |
| 2820 | /* Default cache timeout is 10 minutes */ |
| 2821 | unsigned int nfs_idmap_cache_timeout = 600; |
| 2822 | /* Turn off NFSv4 uid/gid mapping when using AUTH_SYS */ |
| 2823 | bool nfs4_disable_idmapping = true; |
| 2824 | unsigned short max_session_slots = NFS4_DEF_SLOT_TABLE_SIZE; |
| 2825 | unsigned short send_implementation_id = 1; |
Chuck Lever | 6f2ea7f | 2012-09-14 17:24:41 -0400 | [diff] [blame] | 2826 | char nfs4_client_id_uniquifier[NFS4_CLIENT_ID_UNIQ_LEN] = ""; |
Trond Myklebust | f6de7a3 | 2013-09-04 10:08:54 -0400 | [diff] [blame] | 2827 | bool recover_lost_locks = false; |
Bryan Schumaker | fac1e8e | 2012-07-30 16:05:22 -0400 | [diff] [blame] | 2828 | |
Bryan Schumaker | 89d77c8 | 2012-07-30 16:05:25 -0400 | [diff] [blame] | 2829 | EXPORT_SYMBOL_GPL(nfs_callback_set_tcpport); |
| 2830 | EXPORT_SYMBOL_GPL(nfs_callback_tcpport); |
| 2831 | EXPORT_SYMBOL_GPL(nfs_idmap_cache_timeout); |
| 2832 | EXPORT_SYMBOL_GPL(nfs4_disable_idmapping); |
| 2833 | EXPORT_SYMBOL_GPL(max_session_slots); |
| 2834 | EXPORT_SYMBOL_GPL(send_implementation_id); |
Chuck Lever | 6f2ea7f | 2012-09-14 17:24:41 -0400 | [diff] [blame] | 2835 | EXPORT_SYMBOL_GPL(nfs4_client_id_uniquifier); |
Trond Myklebust | f6de7a3 | 2013-09-04 10:08:54 -0400 | [diff] [blame] | 2836 | EXPORT_SYMBOL_GPL(recover_lost_locks); |
Bryan Schumaker | 89d77c8 | 2012-07-30 16:05:25 -0400 | [diff] [blame] | 2837 | |
Bryan Schumaker | fac1e8e | 2012-07-30 16:05:22 -0400 | [diff] [blame] | 2838 | #define NFS_CALLBACK_MAXPORTNR (65535U) |
| 2839 | |
| 2840 | static 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 Walter | 7297cb6 | 2012-09-26 21:51:46 +0200 | [diff] [blame] | 2847 | ret = kstrtoul(val, 0, &num); |
Bryan Schumaker | fac1e8e | 2012-07-30 16:05:22 -0400 | [diff] [blame] | 2848 | if (ret == -EINVAL || num > NFS_CALLBACK_MAXPORTNR) |
| 2849 | return -EINVAL; |
| 2850 | *((unsigned int *)kp->arg) = num; |
| 2851 | return 0; |
| 2852 | } |
Luis R. Rodriguez | 9c27847 | 2015-05-27 11:09:38 +0930 | [diff] [blame] | 2853 | static const struct kernel_param_ops param_ops_portnr = { |
Bryan Schumaker | fac1e8e | 2012-07-30 16:05:22 -0400 | [diff] [blame] | 2854 | .set = param_set_portnr, |
| 2855 | .get = param_get_uint, |
| 2856 | }; |
| 2857 | #define param_check_portnr(name, p) __param_check(name, p, unsigned int); |
| 2858 | |
| 2859 | module_param_named(callback_tcpport, nfs_callback_set_tcpport, portnr, 0644); |
| 2860 | module_param(nfs_idmap_cache_timeout, int, 0644); |
| 2861 | module_param(nfs4_disable_idmapping, bool, 0644); |
Chuck Lever | 6f2ea7f | 2012-09-14 17:24:41 -0400 | [diff] [blame] | 2862 | module_param_string(nfs4_unique_id, nfs4_client_id_uniquifier, |
| 2863 | NFS4_CLIENT_ID_UNIQ_LEN, 0600); |
Bryan Schumaker | fac1e8e | 2012-07-30 16:05:22 -0400 | [diff] [blame] | 2864 | MODULE_PARM_DESC(nfs4_disable_idmapping, |
| 2865 | "Turn off NFSv4 idmapping when using 'sec=sys'"); |
| 2866 | module_param(max_session_slots, ushort, 0644); |
| 2867 | MODULE_PARM_DESC(max_session_slots, "Maximum number of outstanding NFSv4.1 " |
| 2868 | "requests the client will negotiate"); |
| 2869 | module_param(send_implementation_id, ushort, 0644); |
| 2870 | MODULE_PARM_DESC(send_implementation_id, |
| 2871 | "Send implementation ID with NFSv4.1 exchange_id"); |
Chuck Lever | 6f2ea7f | 2012-09-14 17:24:41 -0400 | [diff] [blame] | 2872 | MODULE_PARM_DESC(nfs4_unique_id, "nfs_client_id4 uniquifier string"); |
bjschuma@gmail.com | 425e776 | 2012-08-08 13:57:10 -0400 | [diff] [blame] | 2873 | |
Trond Myklebust | f6de7a3 | 2013-09-04 10:08:54 -0400 | [diff] [blame] | 2874 | module_param(recover_lost_locks, bool, 0644); |
| 2875 | MODULE_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 Howells | 54ceac4 | 2006-08-22 20:06:13 -0400 | [diff] [blame] | 2880 | #endif /* CONFIG_NFS_V4 */ |