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 | * |
| 8 | * Modularised by Alan Cox <Alan.Cox@linux.org>, while hacking some |
| 9 | * experimental NFS changes. Modularisation taken straight from SYS5 fs. |
| 10 | * |
| 11 | * Change to nfs_read_super() to permit NFS mounts to multi-homed hosts. |
| 12 | * J.S.Peatfield@damtp.cam.ac.uk |
| 13 | * |
| 14 | * Split from inode.c by David Howells <dhowells@redhat.com> |
| 15 | * |
| 16 | */ |
| 17 | |
| 18 | #include <linux/config.h> |
| 19 | #include <linux/module.h> |
| 20 | #include <linux/init.h> |
| 21 | |
| 22 | #include <linux/time.h> |
| 23 | #include <linux/kernel.h> |
| 24 | #include <linux/mm.h> |
| 25 | #include <linux/string.h> |
| 26 | #include <linux/stat.h> |
| 27 | #include <linux/errno.h> |
| 28 | #include <linux/unistd.h> |
| 29 | #include <linux/sunrpc/clnt.h> |
| 30 | #include <linux/sunrpc/stats.h> |
| 31 | #include <linux/sunrpc/metrics.h> |
| 32 | #include <linux/nfs_fs.h> |
| 33 | #include <linux/nfs_mount.h> |
| 34 | #include <linux/nfs4_mount.h> |
| 35 | #include <linux/lockd/bind.h> |
| 36 | #include <linux/smp_lock.h> |
| 37 | #include <linux/seq_file.h> |
| 38 | #include <linux/mount.h> |
| 39 | #include <linux/nfs_idmap.h> |
| 40 | #include <linux/vfs.h> |
| 41 | #include <linux/inet.h> |
| 42 | #include <linux/nfs_xdr.h> |
| 43 | |
| 44 | #include <asm/system.h> |
| 45 | #include <asm/uaccess.h> |
| 46 | |
| 47 | #include "nfs4_fs.h" |
| 48 | #include "callback.h" |
| 49 | #include "delegation.h" |
| 50 | #include "iostat.h" |
| 51 | #include "internal.h" |
| 52 | |
| 53 | #define NFSDBG_FACILITY NFSDBG_VFS |
| 54 | |
| 55 | /* Maximum number of readahead requests |
| 56 | * FIXME: this should really be a sysctl so that users may tune it to suit |
| 57 | * their needs. People that do NFS over a slow network, might for |
| 58 | * instance want to reduce it to something closer to 1 for improved |
| 59 | * interactive response. |
| 60 | */ |
| 61 | #define NFS_MAX_READAHEAD (RPC_DEF_SLOT_TABLE - 1) |
| 62 | |
| 63 | /* |
| 64 | * RPC cruft for NFS |
| 65 | */ |
| 66 | static struct rpc_version * nfs_version[] = { |
| 67 | NULL, |
| 68 | NULL, |
| 69 | &nfs_version2, |
| 70 | #if defined(CONFIG_NFS_V3) |
| 71 | &nfs_version3, |
| 72 | #elif defined(CONFIG_NFS_V4) |
| 73 | NULL, |
| 74 | #endif |
| 75 | #if defined(CONFIG_NFS_V4) |
| 76 | &nfs_version4, |
| 77 | #endif |
| 78 | }; |
| 79 | |
| 80 | static struct rpc_program nfs_program = { |
| 81 | .name = "nfs", |
| 82 | .number = NFS_PROGRAM, |
| 83 | .nrvers = ARRAY_SIZE(nfs_version), |
| 84 | .version = nfs_version, |
| 85 | .stats = &nfs_rpcstat, |
| 86 | .pipe_dir_name = "/nfs", |
| 87 | }; |
| 88 | |
| 89 | struct rpc_stat nfs_rpcstat = { |
| 90 | .program = &nfs_program |
| 91 | }; |
| 92 | |
| 93 | |
| 94 | #ifdef CONFIG_NFS_V3_ACL |
| 95 | static struct rpc_stat nfsacl_rpcstat = { &nfsacl_program }; |
| 96 | static struct rpc_version * nfsacl_version[] = { |
| 97 | [3] = &nfsacl_version3, |
| 98 | }; |
| 99 | |
| 100 | struct rpc_program nfsacl_program = { |
| 101 | .name = "nfsacl", |
| 102 | .number = NFS_ACL_PROGRAM, |
| 103 | .nrvers = ARRAY_SIZE(nfsacl_version), |
| 104 | .version = nfsacl_version, |
| 105 | .stats = &nfsacl_rpcstat, |
| 106 | }; |
| 107 | #endif /* CONFIG_NFS_V3_ACL */ |
| 108 | |
| 109 | static void nfs_umount_begin(struct vfsmount *, int); |
Trond Myklebust | 816724e | 2006-06-24 08:41:41 -0400 | [diff] [blame] | 110 | static int nfs_statfs(struct dentry *, struct kstatfs *); |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 111 | static int nfs_show_options(struct seq_file *, struct vfsmount *); |
| 112 | static int nfs_show_stats(struct seq_file *, struct vfsmount *); |
Trond Myklebust | 816724e | 2006-06-24 08:41:41 -0400 | [diff] [blame] | 113 | static int nfs_get_sb(struct file_system_type *, int, const char *, void *, struct vfsmount *); |
| 114 | static int nfs_clone_nfs_sb(struct file_system_type *fs_type, |
| 115 | int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt); |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 116 | static void nfs_kill_super(struct super_block *); |
| 117 | |
| 118 | static struct file_system_type nfs_fs_type = { |
| 119 | .owner = THIS_MODULE, |
| 120 | .name = "nfs", |
| 121 | .get_sb = nfs_get_sb, |
| 122 | .kill_sb = nfs_kill_super, |
| 123 | .fs_flags = FS_ODD_RENAME|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, |
| 124 | }; |
| 125 | |
| 126 | struct file_system_type clone_nfs_fs_type = { |
| 127 | .owner = THIS_MODULE, |
| 128 | .name = "nfs", |
| 129 | .get_sb = nfs_clone_nfs_sb, |
| 130 | .kill_sb = nfs_kill_super, |
| 131 | .fs_flags = FS_ODD_RENAME|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, |
| 132 | }; |
| 133 | |
| 134 | static struct super_operations nfs_sops = { |
| 135 | .alloc_inode = nfs_alloc_inode, |
| 136 | .destroy_inode = nfs_destroy_inode, |
| 137 | .write_inode = nfs_write_inode, |
| 138 | .statfs = nfs_statfs, |
| 139 | .clear_inode = nfs_clear_inode, |
| 140 | .umount_begin = nfs_umount_begin, |
| 141 | .show_options = nfs_show_options, |
| 142 | .show_stats = nfs_show_stats, |
| 143 | }; |
| 144 | |
| 145 | #ifdef CONFIG_NFS_V4 |
Trond Myklebust | 816724e | 2006-06-24 08:41:41 -0400 | [diff] [blame] | 146 | static int nfs4_get_sb(struct file_system_type *fs_type, |
| 147 | int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt); |
| 148 | static int nfs_clone_nfs4_sb(struct file_system_type *fs_type, |
| 149 | int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt); |
| 150 | static int nfs_referral_nfs4_sb(struct file_system_type *fs_type, |
| 151 | int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt); |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 152 | static void nfs4_kill_super(struct super_block *sb); |
| 153 | |
| 154 | static struct file_system_type nfs4_fs_type = { |
| 155 | .owner = THIS_MODULE, |
| 156 | .name = "nfs4", |
| 157 | .get_sb = nfs4_get_sb, |
| 158 | .kill_sb = nfs4_kill_super, |
| 159 | .fs_flags = FS_ODD_RENAME|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, |
| 160 | }; |
| 161 | |
| 162 | struct file_system_type clone_nfs4_fs_type = { |
| 163 | .owner = THIS_MODULE, |
| 164 | .name = "nfs4", |
| 165 | .get_sb = nfs_clone_nfs4_sb, |
| 166 | .kill_sb = nfs4_kill_super, |
| 167 | .fs_flags = FS_ODD_RENAME|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, |
| 168 | }; |
| 169 | |
| 170 | struct file_system_type nfs_referral_nfs4_fs_type = { |
| 171 | .owner = THIS_MODULE, |
| 172 | .name = "nfs4", |
| 173 | .get_sb = nfs_referral_nfs4_sb, |
| 174 | .kill_sb = nfs4_kill_super, |
| 175 | .fs_flags = FS_ODD_RENAME|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, |
| 176 | }; |
| 177 | |
| 178 | static struct super_operations nfs4_sops = { |
| 179 | .alloc_inode = nfs_alloc_inode, |
| 180 | .destroy_inode = nfs_destroy_inode, |
| 181 | .write_inode = nfs_write_inode, |
| 182 | .statfs = nfs_statfs, |
| 183 | .clear_inode = nfs4_clear_inode, |
| 184 | .umount_begin = nfs_umount_begin, |
| 185 | .show_options = nfs_show_options, |
| 186 | .show_stats = nfs_show_stats, |
| 187 | }; |
| 188 | #endif |
| 189 | |
Trond Myklebust | 979df72 | 2006-07-25 11:28:19 -0400 | [diff] [blame] | 190 | static struct shrinker *acl_shrinker; |
| 191 | |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 192 | /* |
| 193 | * Register the NFS filesystems |
| 194 | */ |
| 195 | int __init register_nfs_fs(void) |
| 196 | { |
| 197 | int ret; |
| 198 | |
| 199 | ret = register_filesystem(&nfs_fs_type); |
| 200 | if (ret < 0) |
| 201 | goto error_0; |
| 202 | |
| 203 | #ifdef CONFIG_NFS_V4 |
| 204 | ret = nfs_register_sysctl(); |
| 205 | if (ret < 0) |
| 206 | goto error_1; |
| 207 | ret = register_filesystem(&nfs4_fs_type); |
| 208 | if (ret < 0) |
| 209 | goto error_2; |
| 210 | #endif |
Trond Myklebust | 979df72 | 2006-07-25 11:28:19 -0400 | [diff] [blame] | 211 | acl_shrinker = set_shrinker(DEFAULT_SEEKS, nfs_access_cache_shrinker); |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 212 | return 0; |
| 213 | |
| 214 | #ifdef CONFIG_NFS_V4 |
| 215 | error_2: |
| 216 | nfs_unregister_sysctl(); |
| 217 | error_1: |
| 218 | unregister_filesystem(&nfs_fs_type); |
| 219 | #endif |
| 220 | error_0: |
| 221 | return ret; |
| 222 | } |
| 223 | |
| 224 | /* |
| 225 | * Unregister the NFS filesystems |
| 226 | */ |
| 227 | void __exit unregister_nfs_fs(void) |
| 228 | { |
Trond Myklebust | 979df72 | 2006-07-25 11:28:19 -0400 | [diff] [blame] | 229 | if (acl_shrinker != NULL) |
| 230 | remove_shrinker(acl_shrinker); |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 231 | #ifdef CONFIG_NFS_V4 |
| 232 | unregister_filesystem(&nfs4_fs_type); |
| 233 | nfs_unregister_sysctl(); |
| 234 | #endif |
| 235 | unregister_filesystem(&nfs_fs_type); |
| 236 | } |
| 237 | |
| 238 | /* |
| 239 | * Deliver file system statistics to userspace |
| 240 | */ |
Trond Myklebust | 816724e | 2006-06-24 08:41:41 -0400 | [diff] [blame] | 241 | static int nfs_statfs(struct dentry *dentry, struct kstatfs *buf) |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 242 | { |
David Howells | 0c7d90c | 2006-08-22 20:06:10 -0400 | [diff] [blame^] | 243 | struct nfs_server *server = NFS_SB(dentry->d_sb); |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 244 | unsigned char blockbits; |
| 245 | unsigned long blockres; |
David Howells | 0c7d90c | 2006-08-22 20:06:10 -0400 | [diff] [blame^] | 246 | struct nfs_fh *fh = NFS_FH(dentry->d_inode); |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 247 | struct nfs_fattr fattr; |
| 248 | struct nfs_fsstat res = { |
| 249 | .fattr = &fattr, |
| 250 | }; |
| 251 | int error; |
| 252 | |
| 253 | lock_kernel(); |
| 254 | |
David Howells | 0c7d90c | 2006-08-22 20:06:10 -0400 | [diff] [blame^] | 255 | error = server->rpc_ops->statfs(server, fh, &res); |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 256 | buf->f_type = NFS_SUPER_MAGIC; |
| 257 | if (error < 0) |
| 258 | goto out_err; |
| 259 | |
| 260 | /* |
| 261 | * Current versions of glibc do not correctly handle the |
| 262 | * case where f_frsize != f_bsize. Eventually we want to |
| 263 | * report the value of wtmult in this field. |
| 264 | */ |
David Howells | 0c7d90c | 2006-08-22 20:06:10 -0400 | [diff] [blame^] | 265 | buf->f_frsize = dentry->d_sb->s_blocksize; |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 266 | |
| 267 | /* |
| 268 | * On most *nix systems, f_blocks, f_bfree, and f_bavail |
| 269 | * are reported in units of f_frsize. Linux hasn't had |
| 270 | * an f_frsize field in its statfs struct until recently, |
| 271 | * thus historically Linux's sys_statfs reports these |
| 272 | * fields in units of f_bsize. |
| 273 | */ |
David Howells | 0c7d90c | 2006-08-22 20:06:10 -0400 | [diff] [blame^] | 274 | buf->f_bsize = dentry->d_sb->s_blocksize; |
| 275 | blockbits = dentry->d_sb->s_blocksize_bits; |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 276 | blockres = (1 << blockbits) - 1; |
| 277 | buf->f_blocks = (res.tbytes + blockres) >> blockbits; |
| 278 | buf->f_bfree = (res.fbytes + blockres) >> blockbits; |
| 279 | buf->f_bavail = (res.abytes + blockres) >> blockbits; |
| 280 | |
| 281 | buf->f_files = res.tfiles; |
| 282 | buf->f_ffree = res.afiles; |
| 283 | |
| 284 | buf->f_namelen = server->namelen; |
| 285 | out: |
| 286 | unlock_kernel(); |
| 287 | return 0; |
| 288 | |
| 289 | out_err: |
| 290 | dprintk("%s: statfs error = %d\n", __FUNCTION__, -error); |
| 291 | buf->f_bsize = buf->f_blocks = buf->f_bfree = buf->f_bavail = -1; |
| 292 | goto out; |
| 293 | |
| 294 | } |
| 295 | |
David Howells | 7d4e274 | 2006-08-22 20:06:07 -0400 | [diff] [blame] | 296 | /* |
| 297 | * Map the security flavour number to a name |
| 298 | */ |
Trond Myklebust | 81039f1 | 2006-06-09 09:34:34 -0400 | [diff] [blame] | 299 | static const char *nfs_pseudoflavour_to_name(rpc_authflavor_t flavour) |
| 300 | { |
David Howells | 7d4e274 | 2006-08-22 20:06:07 -0400 | [diff] [blame] | 301 | static const struct { |
Trond Myklebust | 81039f1 | 2006-06-09 09:34:34 -0400 | [diff] [blame] | 302 | rpc_authflavor_t flavour; |
| 303 | const char *str; |
| 304 | } sec_flavours[] = { |
| 305 | { RPC_AUTH_NULL, "null" }, |
| 306 | { RPC_AUTH_UNIX, "sys" }, |
| 307 | { RPC_AUTH_GSS_KRB5, "krb5" }, |
| 308 | { RPC_AUTH_GSS_KRB5I, "krb5i" }, |
| 309 | { RPC_AUTH_GSS_KRB5P, "krb5p" }, |
| 310 | { RPC_AUTH_GSS_LKEY, "lkey" }, |
| 311 | { RPC_AUTH_GSS_LKEYI, "lkeyi" }, |
| 312 | { RPC_AUTH_GSS_LKEYP, "lkeyp" }, |
| 313 | { RPC_AUTH_GSS_SPKM, "spkm" }, |
| 314 | { RPC_AUTH_GSS_SPKMI, "spkmi" }, |
| 315 | { RPC_AUTH_GSS_SPKMP, "spkmp" }, |
| 316 | { -1, "unknown" } |
| 317 | }; |
| 318 | int i; |
| 319 | |
| 320 | for (i=0; sec_flavours[i].flavour != -1; i++) { |
| 321 | if (sec_flavours[i].flavour == flavour) |
| 322 | break; |
| 323 | } |
| 324 | return sec_flavours[i].str; |
| 325 | } |
| 326 | |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 327 | /* |
| 328 | * Describe the mount options in force on this server representation |
| 329 | */ |
| 330 | static void nfs_show_mount_options(struct seq_file *m, struct nfs_server *nfss, int showdefaults) |
| 331 | { |
| 332 | static struct proc_nfs_info { |
| 333 | int flag; |
| 334 | char *str; |
| 335 | char *nostr; |
| 336 | } nfs_info[] = { |
| 337 | { NFS_MOUNT_SOFT, ",soft", ",hard" }, |
| 338 | { NFS_MOUNT_INTR, ",intr", "" }, |
| 339 | { NFS_MOUNT_NOCTO, ",nocto", "" }, |
| 340 | { NFS_MOUNT_NOAC, ",noac", "" }, |
| 341 | { NFS_MOUNT_NONLM, ",nolock", "" }, |
| 342 | { NFS_MOUNT_NOACL, ",noacl", "" }, |
| 343 | { 0, NULL, NULL } |
| 344 | }; |
| 345 | struct proc_nfs_info *nfs_infop; |
| 346 | char buf[12]; |
| 347 | char *proto; |
| 348 | |
| 349 | seq_printf(m, ",vers=%d", nfss->rpc_ops->version); |
| 350 | seq_printf(m, ",rsize=%d", nfss->rsize); |
| 351 | seq_printf(m, ",wsize=%d", nfss->wsize); |
| 352 | if (nfss->acregmin != 3*HZ || showdefaults) |
| 353 | seq_printf(m, ",acregmin=%d", nfss->acregmin/HZ); |
| 354 | if (nfss->acregmax != 60*HZ || showdefaults) |
| 355 | seq_printf(m, ",acregmax=%d", nfss->acregmax/HZ); |
| 356 | if (nfss->acdirmin != 30*HZ || showdefaults) |
| 357 | seq_printf(m, ",acdirmin=%d", nfss->acdirmin/HZ); |
| 358 | if (nfss->acdirmax != 60*HZ || showdefaults) |
| 359 | seq_printf(m, ",acdirmax=%d", nfss->acdirmax/HZ); |
| 360 | for (nfs_infop = nfs_info; nfs_infop->flag; nfs_infop++) { |
| 361 | if (nfss->flags & nfs_infop->flag) |
| 362 | seq_puts(m, nfs_infop->str); |
| 363 | else |
| 364 | seq_puts(m, nfs_infop->nostr); |
| 365 | } |
| 366 | switch (nfss->client->cl_xprt->prot) { |
| 367 | case IPPROTO_TCP: |
| 368 | proto = "tcp"; |
| 369 | break; |
| 370 | case IPPROTO_UDP: |
| 371 | proto = "udp"; |
| 372 | break; |
| 373 | default: |
| 374 | snprintf(buf, sizeof(buf), "%u", nfss->client->cl_xprt->prot); |
| 375 | proto = buf; |
| 376 | } |
| 377 | seq_printf(m, ",proto=%s", proto); |
| 378 | seq_printf(m, ",timeo=%lu", 10U * nfss->retrans_timeo / HZ); |
| 379 | seq_printf(m, ",retrans=%u", nfss->retrans_count); |
Trond Myklebust | 81039f1 | 2006-06-09 09:34:34 -0400 | [diff] [blame] | 380 | seq_printf(m, ",sec=%s", nfs_pseudoflavour_to_name(nfss->client->cl_auth->au_flavor)); |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 381 | } |
| 382 | |
| 383 | /* |
| 384 | * Describe the mount options on this VFS mountpoint |
| 385 | */ |
| 386 | static int nfs_show_options(struct seq_file *m, struct vfsmount *mnt) |
| 387 | { |
| 388 | struct nfs_server *nfss = NFS_SB(mnt->mnt_sb); |
| 389 | |
| 390 | nfs_show_mount_options(m, nfss, 0); |
| 391 | |
| 392 | seq_puts(m, ",addr="); |
| 393 | seq_escape(m, nfss->hostname, " \t\n\\"); |
| 394 | |
| 395 | return 0; |
| 396 | } |
| 397 | |
| 398 | /* |
| 399 | * Present statistical information for this VFS mountpoint |
| 400 | */ |
| 401 | static int nfs_show_stats(struct seq_file *m, struct vfsmount *mnt) |
| 402 | { |
| 403 | int i, cpu; |
| 404 | struct nfs_server *nfss = NFS_SB(mnt->mnt_sb); |
| 405 | struct rpc_auth *auth = nfss->client->cl_auth; |
| 406 | struct nfs_iostats totals = { }; |
| 407 | |
| 408 | seq_printf(m, "statvers=%s", NFS_IOSTAT_VERS); |
| 409 | |
| 410 | /* |
| 411 | * Display all mount option settings |
| 412 | */ |
| 413 | seq_printf(m, "\n\topts:\t"); |
| 414 | seq_puts(m, mnt->mnt_sb->s_flags & MS_RDONLY ? "ro" : "rw"); |
| 415 | seq_puts(m, mnt->mnt_sb->s_flags & MS_SYNCHRONOUS ? ",sync" : ""); |
| 416 | seq_puts(m, mnt->mnt_sb->s_flags & MS_NOATIME ? ",noatime" : ""); |
| 417 | seq_puts(m, mnt->mnt_sb->s_flags & MS_NODIRATIME ? ",nodiratime" : ""); |
| 418 | nfs_show_mount_options(m, nfss, 1); |
| 419 | |
| 420 | seq_printf(m, "\n\tage:\t%lu", (jiffies - nfss->mount_time) / HZ); |
| 421 | |
| 422 | seq_printf(m, "\n\tcaps:\t"); |
| 423 | seq_printf(m, "caps=0x%x", nfss->caps); |
| 424 | seq_printf(m, ",wtmult=%d", nfss->wtmult); |
| 425 | seq_printf(m, ",dtsize=%d", nfss->dtsize); |
| 426 | seq_printf(m, ",bsize=%d", nfss->bsize); |
| 427 | seq_printf(m, ",namelen=%d", nfss->namelen); |
| 428 | |
| 429 | #ifdef CONFIG_NFS_V4 |
| 430 | if (nfss->rpc_ops->version == 4) { |
| 431 | seq_printf(m, "\n\tnfsv4:\t"); |
| 432 | seq_printf(m, "bm0=0x%x", nfss->attr_bitmask[0]); |
| 433 | seq_printf(m, ",bm1=0x%x", nfss->attr_bitmask[1]); |
| 434 | seq_printf(m, ",acl=0x%x", nfss->acl_bitmask); |
| 435 | } |
| 436 | #endif |
| 437 | |
| 438 | /* |
| 439 | * Display security flavor in effect for this mount |
| 440 | */ |
| 441 | seq_printf(m, "\n\tsec:\tflavor=%d", auth->au_ops->au_flavor); |
| 442 | if (auth->au_flavor) |
| 443 | seq_printf(m, ",pseudoflavor=%d", auth->au_flavor); |
| 444 | |
| 445 | /* |
| 446 | * Display superblock I/O counters |
| 447 | */ |
| 448 | for_each_possible_cpu(cpu) { |
| 449 | struct nfs_iostats *stats; |
| 450 | |
| 451 | preempt_disable(); |
| 452 | stats = per_cpu_ptr(nfss->io_stats, cpu); |
| 453 | |
| 454 | for (i = 0; i < __NFSIOS_COUNTSMAX; i++) |
| 455 | totals.events[i] += stats->events[i]; |
| 456 | for (i = 0; i < __NFSIOS_BYTESMAX; i++) |
| 457 | totals.bytes[i] += stats->bytes[i]; |
| 458 | |
| 459 | preempt_enable(); |
| 460 | } |
| 461 | |
| 462 | seq_printf(m, "\n\tevents:\t"); |
| 463 | for (i = 0; i < __NFSIOS_COUNTSMAX; i++) |
| 464 | seq_printf(m, "%lu ", totals.events[i]); |
| 465 | seq_printf(m, "\n\tbytes:\t"); |
| 466 | for (i = 0; i < __NFSIOS_BYTESMAX; i++) |
| 467 | seq_printf(m, "%Lu ", totals.bytes[i]); |
| 468 | seq_printf(m, "\n"); |
| 469 | |
| 470 | rpc_print_iostats(m, nfss->client); |
| 471 | |
| 472 | return 0; |
| 473 | } |
| 474 | |
| 475 | /* |
| 476 | * Begin unmount by attempting to remove all automounted mountpoints we added |
| 477 | * in response to traversals |
| 478 | */ |
| 479 | static void nfs_umount_begin(struct vfsmount *vfsmnt, int flags) |
| 480 | { |
| 481 | struct nfs_server *server; |
| 482 | struct rpc_clnt *rpc; |
| 483 | |
| 484 | shrink_submounts(vfsmnt, &nfs_automount_list); |
| 485 | if (!(flags & MNT_FORCE)) |
| 486 | return; |
| 487 | /* -EIO all pending I/O */ |
| 488 | server = NFS_SB(vfsmnt->mnt_sb); |
| 489 | rpc = server->client; |
| 490 | if (!IS_ERR(rpc)) |
| 491 | rpc_killall_tasks(rpc); |
| 492 | rpc = server->client_acl; |
| 493 | if (!IS_ERR(rpc)) |
| 494 | rpc_killall_tasks(rpc); |
| 495 | } |
| 496 | |
| 497 | /* |
| 498 | * Obtain the root inode of the file system. |
| 499 | */ |
| 500 | static struct inode * |
| 501 | nfs_get_root(struct super_block *sb, struct nfs_fh *rootfh, struct nfs_fsinfo *fsinfo) |
| 502 | { |
| 503 | struct nfs_server *server = NFS_SB(sb); |
| 504 | int error; |
| 505 | |
| 506 | error = server->rpc_ops->getroot(server, rootfh, fsinfo); |
| 507 | if (error < 0) { |
| 508 | dprintk("nfs_get_root: getattr error = %d\n", -error); |
| 509 | return ERR_PTR(error); |
| 510 | } |
| 511 | |
| 512 | server->fsid = fsinfo->fattr->fsid; |
| 513 | return nfs_fhget(sb, rootfh, fsinfo->fattr); |
| 514 | } |
| 515 | |
| 516 | /* |
| 517 | * Do NFS version-independent mount processing, and sanity checking |
| 518 | */ |
| 519 | static int |
| 520 | nfs_sb_init(struct super_block *sb, rpc_authflavor_t authflavor) |
| 521 | { |
| 522 | struct nfs_server *server; |
| 523 | struct inode *root_inode; |
| 524 | struct nfs_fattr fattr; |
| 525 | struct nfs_fsinfo fsinfo = { |
| 526 | .fattr = &fattr, |
| 527 | }; |
| 528 | struct nfs_pathconf pathinfo = { |
| 529 | .fattr = &fattr, |
| 530 | }; |
| 531 | int no_root_error = 0; |
| 532 | unsigned long max_rpc_payload; |
| 533 | |
| 534 | /* We probably want something more informative here */ |
| 535 | snprintf(sb->s_id, sizeof(sb->s_id), "%x:%x", MAJOR(sb->s_dev), MINOR(sb->s_dev)); |
| 536 | |
| 537 | server = NFS_SB(sb); |
| 538 | |
| 539 | sb->s_magic = NFS_SUPER_MAGIC; |
| 540 | |
| 541 | server->io_stats = nfs_alloc_iostats(); |
| 542 | if (server->io_stats == NULL) |
| 543 | return -ENOMEM; |
| 544 | |
| 545 | root_inode = nfs_get_root(sb, &server->fh, &fsinfo); |
| 546 | /* Did getting the root inode fail? */ |
| 547 | if (IS_ERR(root_inode)) { |
| 548 | no_root_error = PTR_ERR(root_inode); |
| 549 | goto out_no_root; |
| 550 | } |
| 551 | sb->s_root = d_alloc_root(root_inode); |
| 552 | if (!sb->s_root) { |
| 553 | no_root_error = -ENOMEM; |
| 554 | goto out_no_root; |
| 555 | } |
| 556 | sb->s_root->d_op = server->rpc_ops->dentry_ops; |
| 557 | |
| 558 | /* mount time stamp, in seconds */ |
| 559 | server->mount_time = jiffies; |
| 560 | |
| 561 | /* Get some general file system info */ |
| 562 | if (server->namelen == 0 && |
| 563 | server->rpc_ops->pathconf(server, &server->fh, &pathinfo) >= 0) |
| 564 | server->namelen = pathinfo.max_namelen; |
| 565 | /* Work out a lot of parameters */ |
| 566 | if (server->rsize == 0) |
| 567 | server->rsize = nfs_block_size(fsinfo.rtpref, NULL); |
| 568 | if (server->wsize == 0) |
| 569 | server->wsize = nfs_block_size(fsinfo.wtpref, NULL); |
| 570 | |
| 571 | if (fsinfo.rtmax >= 512 && server->rsize > fsinfo.rtmax) |
| 572 | server->rsize = nfs_block_size(fsinfo.rtmax, NULL); |
| 573 | if (fsinfo.wtmax >= 512 && server->wsize > fsinfo.wtmax) |
| 574 | server->wsize = nfs_block_size(fsinfo.wtmax, NULL); |
| 575 | |
| 576 | max_rpc_payload = nfs_block_size(rpc_max_payload(server->client), NULL); |
| 577 | if (server->rsize > max_rpc_payload) |
| 578 | server->rsize = max_rpc_payload; |
| 579 | if (server->rsize > NFS_MAX_FILE_IO_SIZE) |
| 580 | server->rsize = NFS_MAX_FILE_IO_SIZE; |
| 581 | server->rpages = (server->rsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; |
| 582 | |
| 583 | if (server->wsize > max_rpc_payload) |
| 584 | server->wsize = max_rpc_payload; |
| 585 | if (server->wsize > NFS_MAX_FILE_IO_SIZE) |
| 586 | server->wsize = NFS_MAX_FILE_IO_SIZE; |
| 587 | server->wpages = (server->wsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; |
| 588 | |
| 589 | if (sb->s_blocksize == 0) |
| 590 | sb->s_blocksize = nfs_block_bits(server->wsize, |
| 591 | &sb->s_blocksize_bits); |
| 592 | server->wtmult = nfs_block_bits(fsinfo.wtmult, NULL); |
| 593 | |
| 594 | server->dtsize = nfs_block_size(fsinfo.dtpref, NULL); |
| 595 | if (server->dtsize > PAGE_CACHE_SIZE) |
| 596 | server->dtsize = PAGE_CACHE_SIZE; |
| 597 | if (server->dtsize > server->rsize) |
| 598 | server->dtsize = server->rsize; |
| 599 | |
| 600 | if (server->flags & NFS_MOUNT_NOAC) { |
| 601 | server->acregmin = server->acregmax = 0; |
| 602 | server->acdirmin = server->acdirmax = 0; |
| 603 | sb->s_flags |= MS_SYNCHRONOUS; |
| 604 | } |
| 605 | server->backing_dev_info.ra_pages = server->rpages * NFS_MAX_READAHEAD; |
| 606 | |
| 607 | nfs_super_set_maxbytes(sb, fsinfo.maxfilesize); |
| 608 | |
| 609 | server->client->cl_intr = (server->flags & NFS_MOUNT_INTR) ? 1 : 0; |
| 610 | server->client->cl_softrtry = (server->flags & NFS_MOUNT_SOFT) ? 1 : 0; |
| 611 | |
| 612 | /* We're airborne Set socket buffersize */ |
| 613 | rpc_setbufsize(server->client, server->wsize + 100, server->rsize + 100); |
| 614 | return 0; |
| 615 | /* Yargs. It didn't work out. */ |
| 616 | out_no_root: |
| 617 | dprintk("nfs_sb_init: get root inode failed: errno %d\n", -no_root_error); |
| 618 | if (!IS_ERR(root_inode)) |
| 619 | iput(root_inode); |
| 620 | return no_root_error; |
| 621 | } |
| 622 | |
| 623 | /* |
| 624 | * Initialise the timeout values for a connection |
| 625 | */ |
| 626 | static void nfs_init_timeout_values(struct rpc_timeout *to, int proto, unsigned int timeo, unsigned int retrans) |
| 627 | { |
| 628 | to->to_initval = timeo * HZ / 10; |
| 629 | to->to_retries = retrans; |
| 630 | if (!to->to_retries) |
| 631 | to->to_retries = 2; |
| 632 | |
| 633 | switch (proto) { |
| 634 | case IPPROTO_TCP: |
| 635 | if (!to->to_initval) |
| 636 | to->to_initval = 60 * HZ; |
| 637 | if (to->to_initval > NFS_MAX_TCP_TIMEOUT) |
| 638 | to->to_initval = NFS_MAX_TCP_TIMEOUT; |
| 639 | to->to_increment = to->to_initval; |
| 640 | to->to_maxval = to->to_initval + (to->to_increment * to->to_retries); |
| 641 | to->to_exponential = 0; |
| 642 | break; |
| 643 | case IPPROTO_UDP: |
| 644 | default: |
| 645 | if (!to->to_initval) |
| 646 | to->to_initval = 11 * HZ / 10; |
| 647 | if (to->to_initval > NFS_MAX_UDP_TIMEOUT) |
| 648 | to->to_initval = NFS_MAX_UDP_TIMEOUT; |
| 649 | to->to_maxval = NFS_MAX_UDP_TIMEOUT; |
| 650 | to->to_exponential = 1; |
| 651 | break; |
| 652 | } |
| 653 | } |
| 654 | |
| 655 | /* |
| 656 | * Create an RPC client handle. |
| 657 | */ |
| 658 | static struct rpc_clnt * |
| 659 | nfs_create_client(struct nfs_server *server, const struct nfs_mount_data *data) |
| 660 | { |
| 661 | struct rpc_timeout timeparms; |
| 662 | struct rpc_xprt *xprt = NULL; |
| 663 | struct rpc_clnt *clnt = NULL; |
| 664 | int proto = (data->flags & NFS_MOUNT_TCP) ? IPPROTO_TCP : IPPROTO_UDP; |
| 665 | |
| 666 | nfs_init_timeout_values(&timeparms, proto, data->timeo, data->retrans); |
| 667 | |
| 668 | server->retrans_timeo = timeparms.to_initval; |
| 669 | server->retrans_count = timeparms.to_retries; |
| 670 | |
| 671 | /* create transport and client */ |
| 672 | xprt = xprt_create_proto(proto, &server->addr, &timeparms); |
| 673 | if (IS_ERR(xprt)) { |
| 674 | dprintk("%s: cannot create RPC transport. Error = %ld\n", |
| 675 | __FUNCTION__, PTR_ERR(xprt)); |
| 676 | return (struct rpc_clnt *)xprt; |
| 677 | } |
| 678 | clnt = rpc_create_client(xprt, server->hostname, &nfs_program, |
| 679 | server->rpc_ops->version, data->pseudoflavor); |
| 680 | if (IS_ERR(clnt)) { |
| 681 | dprintk("%s: cannot create RPC client. Error = %ld\n", |
| 682 | __FUNCTION__, PTR_ERR(xprt)); |
| 683 | goto out_fail; |
| 684 | } |
| 685 | |
| 686 | clnt->cl_intr = 1; |
| 687 | clnt->cl_softrtry = 1; |
| 688 | |
| 689 | return clnt; |
| 690 | |
| 691 | out_fail: |
| 692 | return clnt; |
| 693 | } |
| 694 | |
| 695 | /* |
| 696 | * Clone a server record |
| 697 | */ |
| 698 | static struct nfs_server *nfs_clone_server(struct super_block *sb, struct nfs_clone_mount *data) |
| 699 | { |
| 700 | struct nfs_server *server = NFS_SB(sb); |
| 701 | struct nfs_server *parent = NFS_SB(data->sb); |
| 702 | struct inode *root_inode; |
| 703 | struct nfs_fsinfo fsinfo; |
| 704 | void *err = ERR_PTR(-ENOMEM); |
| 705 | |
| 706 | sb->s_op = data->sb->s_op; |
| 707 | sb->s_blocksize = data->sb->s_blocksize; |
| 708 | sb->s_blocksize_bits = data->sb->s_blocksize_bits; |
| 709 | sb->s_maxbytes = data->sb->s_maxbytes; |
| 710 | |
| 711 | server->client_sys = server->client_acl = ERR_PTR(-EINVAL); |
| 712 | server->io_stats = nfs_alloc_iostats(); |
| 713 | if (server->io_stats == NULL) |
| 714 | goto out; |
| 715 | |
| 716 | server->client = rpc_clone_client(parent->client); |
| 717 | if (IS_ERR((err = server->client))) |
| 718 | goto out; |
| 719 | |
| 720 | if (!IS_ERR(parent->client_sys)) { |
| 721 | server->client_sys = rpc_clone_client(parent->client_sys); |
| 722 | if (IS_ERR((err = server->client_sys))) |
| 723 | goto out; |
| 724 | } |
| 725 | if (!IS_ERR(parent->client_acl)) { |
| 726 | server->client_acl = rpc_clone_client(parent->client_acl); |
| 727 | if (IS_ERR((err = server->client_acl))) |
| 728 | goto out; |
| 729 | } |
| 730 | root_inode = nfs_fhget(sb, data->fh, data->fattr); |
| 731 | if (!root_inode) |
| 732 | goto out; |
| 733 | sb->s_root = d_alloc_root(root_inode); |
| 734 | if (!sb->s_root) |
| 735 | goto out_put_root; |
| 736 | fsinfo.fattr = data->fattr; |
| 737 | if (NFS_PROTO(root_inode)->fsinfo(server, data->fh, &fsinfo) == 0) |
| 738 | nfs_super_set_maxbytes(sb, fsinfo.maxfilesize); |
| 739 | sb->s_root->d_op = server->rpc_ops->dentry_ops; |
| 740 | sb->s_flags |= MS_ACTIVE; |
| 741 | return server; |
| 742 | out_put_root: |
| 743 | iput(root_inode); |
| 744 | out: |
| 745 | return err; |
| 746 | } |
| 747 | |
| 748 | /* |
| 749 | * Copy an existing superblock and attach revised data |
| 750 | */ |
Trond Myklebust | 816724e | 2006-06-24 08:41:41 -0400 | [diff] [blame] | 751 | static int nfs_clone_generic_sb(struct nfs_clone_mount *data, |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 752 | struct super_block *(*fill_sb)(struct nfs_server *, struct nfs_clone_mount *), |
Trond Myklebust | 816724e | 2006-06-24 08:41:41 -0400 | [diff] [blame] | 753 | struct nfs_server *(*fill_server)(struct super_block *, struct nfs_clone_mount *), |
| 754 | struct vfsmount *mnt) |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 755 | { |
| 756 | struct nfs_server *server; |
| 757 | struct nfs_server *parent = NFS_SB(data->sb); |
| 758 | struct super_block *sb = ERR_PTR(-EINVAL); |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 759 | char *hostname; |
Trond Myklebust | 816724e | 2006-06-24 08:41:41 -0400 | [diff] [blame] | 760 | int error = -ENOMEM; |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 761 | int len; |
| 762 | |
| 763 | server = kmalloc(sizeof(struct nfs_server), GFP_KERNEL); |
| 764 | if (server == NULL) |
| 765 | goto out_err; |
| 766 | memcpy(server, parent, sizeof(*server)); |
| 767 | hostname = (data->hostname != NULL) ? data->hostname : parent->hostname; |
| 768 | len = strlen(hostname) + 1; |
| 769 | server->hostname = kmalloc(len, GFP_KERNEL); |
| 770 | if (server->hostname == NULL) |
| 771 | goto free_server; |
| 772 | memcpy(server->hostname, hostname, len); |
Trond Myklebust | 816724e | 2006-06-24 08:41:41 -0400 | [diff] [blame] | 773 | error = rpciod_up(); |
| 774 | if (error != 0) |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 775 | goto free_hostname; |
| 776 | |
| 777 | sb = fill_sb(server, data); |
Trond Myklebust | 816724e | 2006-06-24 08:41:41 -0400 | [diff] [blame] | 778 | if (IS_ERR(sb)) { |
| 779 | error = PTR_ERR(sb); |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 780 | goto kill_rpciod; |
Trond Myklebust | 816724e | 2006-06-24 08:41:41 -0400 | [diff] [blame] | 781 | } |
| 782 | |
| 783 | if (sb->s_root) |
| 784 | goto out_rpciod_down; |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 785 | |
| 786 | server = fill_server(sb, data); |
Trond Myklebust | 816724e | 2006-06-24 08:41:41 -0400 | [diff] [blame] | 787 | if (IS_ERR(server)) { |
| 788 | error = PTR_ERR(server); |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 789 | goto out_deactivate; |
Trond Myklebust | 816724e | 2006-06-24 08:41:41 -0400 | [diff] [blame] | 790 | } |
| 791 | return simple_set_mnt(mnt, sb); |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 792 | out_deactivate: |
| 793 | up_write(&sb->s_umount); |
| 794 | deactivate_super(sb); |
Trond Myklebust | 816724e | 2006-06-24 08:41:41 -0400 | [diff] [blame] | 795 | return error; |
| 796 | out_rpciod_down: |
| 797 | rpciod_down(); |
| 798 | kfree(server->hostname); |
| 799 | kfree(server); |
| 800 | return simple_set_mnt(mnt, sb); |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 801 | kill_rpciod: |
| 802 | rpciod_down(); |
| 803 | free_hostname: |
| 804 | kfree(server->hostname); |
| 805 | free_server: |
| 806 | kfree(server); |
| 807 | out_err: |
Trond Myklebust | 816724e | 2006-06-24 08:41:41 -0400 | [diff] [blame] | 808 | return error; |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 809 | } |
| 810 | |
| 811 | /* |
| 812 | * Set up an NFS2/3 superblock |
| 813 | * |
| 814 | * The way this works is that the mount process passes a structure |
| 815 | * in the data argument which contains the server's IP address |
| 816 | * and the root file handle obtained from the server's mount |
| 817 | * daemon. We stash these away in the private superblock fields. |
| 818 | */ |
| 819 | static int |
| 820 | nfs_fill_super(struct super_block *sb, struct nfs_mount_data *data, int silent) |
| 821 | { |
| 822 | struct nfs_server *server; |
| 823 | rpc_authflavor_t authflavor; |
| 824 | |
| 825 | server = NFS_SB(sb); |
| 826 | sb->s_blocksize_bits = 0; |
| 827 | sb->s_blocksize = 0; |
| 828 | if (data->bsize) |
| 829 | sb->s_blocksize = nfs_block_size(data->bsize, &sb->s_blocksize_bits); |
| 830 | if (data->rsize) |
| 831 | server->rsize = nfs_block_size(data->rsize, NULL); |
| 832 | if (data->wsize) |
| 833 | server->wsize = nfs_block_size(data->wsize, NULL); |
| 834 | server->flags = data->flags & NFS_MOUNT_FLAGMASK; |
| 835 | |
| 836 | server->acregmin = data->acregmin*HZ; |
| 837 | server->acregmax = data->acregmax*HZ; |
| 838 | server->acdirmin = data->acdirmin*HZ; |
| 839 | server->acdirmax = data->acdirmax*HZ; |
| 840 | |
| 841 | /* Start lockd here, before we might error out */ |
| 842 | if (!(server->flags & NFS_MOUNT_NONLM)) |
| 843 | lockd_up(); |
| 844 | |
| 845 | server->namelen = data->namlen; |
| 846 | server->hostname = kmalloc(strlen(data->hostname) + 1, GFP_KERNEL); |
| 847 | if (!server->hostname) |
| 848 | return -ENOMEM; |
| 849 | strcpy(server->hostname, data->hostname); |
| 850 | |
| 851 | /* Check NFS protocol revision and initialize RPC op vector |
| 852 | * and file handle pool. */ |
| 853 | #ifdef CONFIG_NFS_V3 |
| 854 | if (server->flags & NFS_MOUNT_VER3) { |
| 855 | server->rpc_ops = &nfs_v3_clientops; |
| 856 | server->caps |= NFS_CAP_READDIRPLUS; |
| 857 | } else { |
| 858 | server->rpc_ops = &nfs_v2_clientops; |
| 859 | } |
| 860 | #else |
| 861 | server->rpc_ops = &nfs_v2_clientops; |
| 862 | #endif |
| 863 | |
| 864 | /* Fill in pseudoflavor for mount version < 5 */ |
| 865 | if (!(data->flags & NFS_MOUNT_SECFLAVOUR)) |
| 866 | data->pseudoflavor = RPC_AUTH_UNIX; |
| 867 | authflavor = data->pseudoflavor; /* save for sb_init() */ |
| 868 | /* XXX maybe we want to add a server->pseudoflavor field */ |
| 869 | |
| 870 | /* Create RPC client handles */ |
| 871 | server->client = nfs_create_client(server, data); |
| 872 | if (IS_ERR(server->client)) |
| 873 | return PTR_ERR(server->client); |
| 874 | /* RFC 2623, sec 2.3.2 */ |
| 875 | if (authflavor != RPC_AUTH_UNIX) { |
| 876 | struct rpc_auth *auth; |
| 877 | |
| 878 | server->client_sys = rpc_clone_client(server->client); |
| 879 | if (IS_ERR(server->client_sys)) |
| 880 | return PTR_ERR(server->client_sys); |
| 881 | auth = rpcauth_create(RPC_AUTH_UNIX, server->client_sys); |
| 882 | if (IS_ERR(auth)) |
| 883 | return PTR_ERR(auth); |
| 884 | } else { |
| 885 | atomic_inc(&server->client->cl_count); |
| 886 | server->client_sys = server->client; |
| 887 | } |
| 888 | if (server->flags & NFS_MOUNT_VER3) { |
| 889 | #ifdef CONFIG_NFS_V3_ACL |
| 890 | if (!(server->flags & NFS_MOUNT_NOACL)) { |
| 891 | server->client_acl = rpc_bind_new_program(server->client, &nfsacl_program, 3); |
| 892 | /* No errors! Assume that Sun nfsacls are supported */ |
| 893 | if (!IS_ERR(server->client_acl)) |
| 894 | server->caps |= NFS_CAP_ACLS; |
| 895 | } |
| 896 | #else |
| 897 | server->flags &= ~NFS_MOUNT_NOACL; |
| 898 | #endif /* CONFIG_NFS_V3_ACL */ |
| 899 | /* |
| 900 | * The VFS shouldn't apply the umask to mode bits. We will |
| 901 | * do so ourselves when necessary. |
| 902 | */ |
| 903 | sb->s_flags |= MS_POSIXACL; |
| 904 | if (server->namelen == 0 || server->namelen > NFS3_MAXNAMLEN) |
| 905 | server->namelen = NFS3_MAXNAMLEN; |
| 906 | sb->s_time_gran = 1; |
| 907 | } else { |
| 908 | if (server->namelen == 0 || server->namelen > NFS2_MAXNAMLEN) |
| 909 | server->namelen = NFS2_MAXNAMLEN; |
| 910 | } |
| 911 | |
| 912 | sb->s_op = &nfs_sops; |
| 913 | return nfs_sb_init(sb, authflavor); |
| 914 | } |
| 915 | |
| 916 | static int nfs_set_super(struct super_block *s, void *data) |
| 917 | { |
| 918 | s->s_fs_info = data; |
| 919 | return set_anon_super(s, data); |
| 920 | } |
| 921 | |
| 922 | static int nfs_compare_super(struct super_block *sb, void *data) |
| 923 | { |
| 924 | struct nfs_server *server = data; |
| 925 | struct nfs_server *old = NFS_SB(sb); |
| 926 | |
| 927 | if (old->addr.sin_addr.s_addr != server->addr.sin_addr.s_addr) |
| 928 | return 0; |
| 929 | if (old->addr.sin_port != server->addr.sin_port) |
| 930 | return 0; |
| 931 | return !nfs_compare_fh(&old->fh, &server->fh); |
| 932 | } |
| 933 | |
Trond Myklebust | 816724e | 2006-06-24 08:41:41 -0400 | [diff] [blame] | 934 | static int nfs_get_sb(struct file_system_type *fs_type, |
| 935 | int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt) |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 936 | { |
| 937 | int error; |
| 938 | struct nfs_server *server = NULL; |
| 939 | struct super_block *s; |
| 940 | struct nfs_fh *root; |
| 941 | struct nfs_mount_data *data = raw_data; |
| 942 | |
Trond Myklebust | 816724e | 2006-06-24 08:41:41 -0400 | [diff] [blame] | 943 | error = -EINVAL; |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 944 | if (data == NULL) { |
| 945 | dprintk("%s: missing data argument\n", __FUNCTION__); |
Trond Myklebust | 816724e | 2006-06-24 08:41:41 -0400 | [diff] [blame] | 946 | goto out_err_noserver; |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 947 | } |
| 948 | if (data->version <= 0 || data->version > NFS_MOUNT_VERSION) { |
| 949 | dprintk("%s: bad mount version\n", __FUNCTION__); |
Trond Myklebust | 816724e | 2006-06-24 08:41:41 -0400 | [diff] [blame] | 950 | goto out_err_noserver; |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 951 | } |
| 952 | switch (data->version) { |
| 953 | case 1: |
| 954 | data->namlen = 0; |
| 955 | case 2: |
| 956 | data->bsize = 0; |
| 957 | case 3: |
| 958 | if (data->flags & NFS_MOUNT_VER3) { |
| 959 | dprintk("%s: mount structure version %d does not support NFSv3\n", |
| 960 | __FUNCTION__, |
| 961 | data->version); |
Trond Myklebust | 816724e | 2006-06-24 08:41:41 -0400 | [diff] [blame] | 962 | goto out_err_noserver; |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 963 | } |
| 964 | data->root.size = NFS2_FHSIZE; |
| 965 | memcpy(data->root.data, data->old_root.data, NFS2_FHSIZE); |
| 966 | case 4: |
| 967 | if (data->flags & NFS_MOUNT_SECFLAVOUR) { |
| 968 | dprintk("%s: mount structure version %d does not support strong security\n", |
| 969 | __FUNCTION__, |
| 970 | data->version); |
Trond Myklebust | 816724e | 2006-06-24 08:41:41 -0400 | [diff] [blame] | 971 | goto out_err_noserver; |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 972 | } |
| 973 | case 5: |
| 974 | memset(data->context, 0, sizeof(data->context)); |
| 975 | } |
| 976 | #ifndef CONFIG_NFS_V3 |
| 977 | /* If NFSv3 is not compiled in, return -EPROTONOSUPPORT */ |
Trond Myklebust | 816724e | 2006-06-24 08:41:41 -0400 | [diff] [blame] | 978 | error = -EPROTONOSUPPORT; |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 979 | if (data->flags & NFS_MOUNT_VER3) { |
| 980 | dprintk("%s: NFSv3 not compiled into kernel\n", __FUNCTION__); |
Trond Myklebust | 816724e | 2006-06-24 08:41:41 -0400 | [diff] [blame] | 981 | goto out_err_noserver; |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 982 | } |
| 983 | #endif /* CONFIG_NFS_V3 */ |
| 984 | |
Trond Myklebust | 816724e | 2006-06-24 08:41:41 -0400 | [diff] [blame] | 985 | error = -ENOMEM; |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 986 | server = kzalloc(sizeof(struct nfs_server), GFP_KERNEL); |
| 987 | if (!server) |
Trond Myklebust | 816724e | 2006-06-24 08:41:41 -0400 | [diff] [blame] | 988 | goto out_err_noserver; |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 989 | /* Zero out the NFS state stuff */ |
| 990 | init_nfsv4_state(server); |
| 991 | server->client = server->client_sys = server->client_acl = ERR_PTR(-EINVAL); |
| 992 | |
| 993 | root = &server->fh; |
| 994 | if (data->flags & NFS_MOUNT_VER3) |
| 995 | root->size = data->root.size; |
| 996 | else |
| 997 | root->size = NFS2_FHSIZE; |
Trond Myklebust | 816724e | 2006-06-24 08:41:41 -0400 | [diff] [blame] | 998 | error = -EINVAL; |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 999 | if (root->size > sizeof(root->data)) { |
| 1000 | dprintk("%s: invalid root filehandle\n", __FUNCTION__); |
| 1001 | goto out_err; |
| 1002 | } |
| 1003 | memcpy(root->data, data->root.data, root->size); |
| 1004 | |
| 1005 | /* We now require that the mount process passes the remote address */ |
| 1006 | memcpy(&server->addr, &data->addr, sizeof(server->addr)); |
| 1007 | if (server->addr.sin_addr.s_addr == INADDR_ANY) { |
| 1008 | dprintk("%s: mount program didn't pass remote address!\n", |
| 1009 | __FUNCTION__); |
| 1010 | goto out_err; |
| 1011 | } |
| 1012 | |
| 1013 | /* Fire up rpciod if not yet running */ |
Trond Myklebust | 816724e | 2006-06-24 08:41:41 -0400 | [diff] [blame] | 1014 | error = rpciod_up(); |
| 1015 | if (error < 0) { |
| 1016 | dprintk("%s: couldn't start rpciod! Error = %d\n", |
| 1017 | __FUNCTION__, error); |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 1018 | goto out_err; |
| 1019 | } |
| 1020 | |
| 1021 | s = sget(fs_type, nfs_compare_super, nfs_set_super, server); |
Trond Myklebust | 816724e | 2006-06-24 08:41:41 -0400 | [diff] [blame] | 1022 | if (IS_ERR(s)) { |
| 1023 | error = PTR_ERR(s); |
| 1024 | goto out_err_rpciod; |
| 1025 | } |
| 1026 | |
| 1027 | if (s->s_root) |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 1028 | goto out_rpciod_down; |
| 1029 | |
| 1030 | s->s_flags = flags; |
| 1031 | |
| 1032 | error = nfs_fill_super(s, data, flags & MS_SILENT ? 1 : 0); |
| 1033 | if (error) { |
| 1034 | up_write(&s->s_umount); |
| 1035 | deactivate_super(s); |
Trond Myklebust | 816724e | 2006-06-24 08:41:41 -0400 | [diff] [blame] | 1036 | return error; |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 1037 | } |
| 1038 | s->s_flags |= MS_ACTIVE; |
Trond Myklebust | 816724e | 2006-06-24 08:41:41 -0400 | [diff] [blame] | 1039 | return simple_set_mnt(mnt, s); |
| 1040 | |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 1041 | out_rpciod_down: |
| 1042 | rpciod_down(); |
Trond Myklebust | 816724e | 2006-06-24 08:41:41 -0400 | [diff] [blame] | 1043 | kfree(server); |
| 1044 | return simple_set_mnt(mnt, s); |
| 1045 | |
| 1046 | out_err_rpciod: |
| 1047 | rpciod_down(); |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 1048 | out_err: |
| 1049 | kfree(server); |
Trond Myklebust | 816724e | 2006-06-24 08:41:41 -0400 | [diff] [blame] | 1050 | out_err_noserver: |
| 1051 | return error; |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 1052 | } |
| 1053 | |
| 1054 | static void nfs_kill_super(struct super_block *s) |
| 1055 | { |
| 1056 | struct nfs_server *server = NFS_SB(s); |
| 1057 | |
| 1058 | kill_anon_super(s); |
| 1059 | |
| 1060 | if (!IS_ERR(server->client)) |
| 1061 | rpc_shutdown_client(server->client); |
| 1062 | if (!IS_ERR(server->client_sys)) |
| 1063 | rpc_shutdown_client(server->client_sys); |
| 1064 | if (!IS_ERR(server->client_acl)) |
| 1065 | rpc_shutdown_client(server->client_acl); |
| 1066 | |
| 1067 | if (!(server->flags & NFS_MOUNT_NONLM)) |
| 1068 | lockd_down(); /* release rpc.lockd */ |
| 1069 | |
| 1070 | rpciod_down(); /* release rpciod */ |
| 1071 | |
| 1072 | nfs_free_iostats(server->io_stats); |
| 1073 | kfree(server->hostname); |
| 1074 | kfree(server); |
| 1075 | nfs_release_automount_timer(); |
| 1076 | } |
| 1077 | |
| 1078 | static struct super_block *nfs_clone_sb(struct nfs_server *server, struct nfs_clone_mount *data) |
| 1079 | { |
| 1080 | struct super_block *sb; |
| 1081 | |
| 1082 | server->fsid = data->fattr->fsid; |
| 1083 | nfs_copy_fh(&server->fh, data->fh); |
| 1084 | sb = sget(&nfs_fs_type, nfs_compare_super, nfs_set_super, server); |
| 1085 | if (!IS_ERR(sb) && sb->s_root == NULL && !(server->flags & NFS_MOUNT_NONLM)) |
| 1086 | lockd_up(); |
| 1087 | return sb; |
| 1088 | } |
| 1089 | |
Trond Myklebust | 816724e | 2006-06-24 08:41:41 -0400 | [diff] [blame] | 1090 | static int nfs_clone_nfs_sb(struct file_system_type *fs_type, |
| 1091 | int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt) |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 1092 | { |
| 1093 | struct nfs_clone_mount *data = raw_data; |
Trond Myklebust | 816724e | 2006-06-24 08:41:41 -0400 | [diff] [blame] | 1094 | return nfs_clone_generic_sb(data, nfs_clone_sb, nfs_clone_server, mnt); |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 1095 | } |
| 1096 | |
| 1097 | #ifdef CONFIG_NFS_V4 |
| 1098 | static struct rpc_clnt *nfs4_create_client(struct nfs_server *server, |
| 1099 | struct rpc_timeout *timeparms, int proto, rpc_authflavor_t flavor) |
| 1100 | { |
David Howells | adfa6f9 | 2006-08-22 20:06:08 -0400 | [diff] [blame] | 1101 | struct nfs_client *clp; |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 1102 | struct rpc_xprt *xprt = NULL; |
| 1103 | struct rpc_clnt *clnt = NULL; |
| 1104 | int err = -EIO; |
| 1105 | |
David Howells | 24c8dbb | 2006-08-22 20:06:10 -0400 | [diff] [blame] | 1106 | clp = nfs_get_client(server->hostname, &server->addr, 4); |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 1107 | if (!clp) { |
| 1108 | dprintk("%s: failed to create NFS4 client.\n", __FUNCTION__); |
| 1109 | return ERR_PTR(err); |
| 1110 | } |
| 1111 | |
| 1112 | /* Now create transport and client */ |
David Howells | 24c8dbb | 2006-08-22 20:06:10 -0400 | [diff] [blame] | 1113 | if (clp->cl_cons_state == NFS_CS_INITING) { |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 1114 | xprt = xprt_create_proto(proto, &server->addr, timeparms); |
| 1115 | if (IS_ERR(xprt)) { |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 1116 | err = PTR_ERR(xprt); |
| 1117 | dprintk("%s: cannot create RPC transport. Error = %d\n", |
| 1118 | __FUNCTION__, err); |
David Howells | 24c8dbb | 2006-08-22 20:06:10 -0400 | [diff] [blame] | 1119 | goto client_init_error; |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 1120 | } |
| 1121 | /* Bind to a reserved port! */ |
| 1122 | xprt->resvport = 1; |
| 1123 | clnt = rpc_create_client(xprt, server->hostname, &nfs_program, |
| 1124 | server->rpc_ops->version, flavor); |
| 1125 | if (IS_ERR(clnt)) { |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 1126 | err = PTR_ERR(clnt); |
| 1127 | dprintk("%s: cannot create RPC client. Error = %d\n", |
| 1128 | __FUNCTION__, err); |
David Howells | 24c8dbb | 2006-08-22 20:06:10 -0400 | [diff] [blame] | 1129 | goto client_init_error; |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 1130 | } |
| 1131 | clnt->cl_intr = 1; |
| 1132 | clnt->cl_softrtry = 1; |
| 1133 | clp->cl_rpcclient = clnt; |
| 1134 | memcpy(clp->cl_ipaddr, server->ip_addr, sizeof(clp->cl_ipaddr)); |
David Howells | 24c8dbb | 2006-08-22 20:06:10 -0400 | [diff] [blame] | 1135 | err = nfs_idmap_new(clp); |
| 1136 | if (err < 0) { |
| 1137 | dprintk("%s: failed to create idmapper.\n", |
| 1138 | __FUNCTION__); |
| 1139 | goto client_init_error; |
| 1140 | } |
| 1141 | __set_bit(NFS_CS_IDMAP, &clp->cl_res_state); |
| 1142 | nfs_mark_client_ready(clp, 0); |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 1143 | } |
David Howells | 24c8dbb | 2006-08-22 20:06:10 -0400 | [diff] [blame] | 1144 | |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 1145 | clnt = rpc_clone_client(clp->cl_rpcclient); |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 1146 | |
| 1147 | if (IS_ERR(clnt)) { |
| 1148 | dprintk("%s: cannot create RPC client. Error = %d\n", |
| 1149 | __FUNCTION__, err); |
| 1150 | return clnt; |
| 1151 | } |
| 1152 | |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 1153 | if (clnt->cl_auth->au_flavor != flavor) { |
| 1154 | struct rpc_auth *auth; |
| 1155 | |
| 1156 | auth = rpcauth_create(flavor, clnt); |
| 1157 | if (IS_ERR(auth)) { |
| 1158 | dprintk("%s: couldn't create credcache!\n", __FUNCTION__); |
| 1159 | return (struct rpc_clnt *)auth; |
| 1160 | } |
| 1161 | } |
David Howells | 24c8dbb | 2006-08-22 20:06:10 -0400 | [diff] [blame] | 1162 | |
| 1163 | server->nfs_client = clp; |
| 1164 | down_write(&clp->cl_sem); |
| 1165 | list_add_tail(&server->nfs4_siblings, &clp->cl_superblocks); |
| 1166 | up_write(&clp->cl_sem); |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 1167 | return clnt; |
| 1168 | |
David Howells | 24c8dbb | 2006-08-22 20:06:10 -0400 | [diff] [blame] | 1169 | client_init_error: |
| 1170 | nfs_mark_client_ready(clp, err); |
| 1171 | nfs_put_client(clp); |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 1172 | return ERR_PTR(err); |
| 1173 | } |
| 1174 | |
| 1175 | /* |
| 1176 | * Set up an NFS4 superblock |
| 1177 | */ |
| 1178 | static int nfs4_fill_super(struct super_block *sb, struct nfs4_mount_data *data, int silent) |
| 1179 | { |
| 1180 | struct nfs_server *server; |
| 1181 | struct rpc_timeout timeparms; |
| 1182 | rpc_authflavor_t authflavour; |
| 1183 | int err = -EIO; |
| 1184 | |
| 1185 | sb->s_blocksize_bits = 0; |
| 1186 | sb->s_blocksize = 0; |
| 1187 | server = NFS_SB(sb); |
| 1188 | if (data->rsize != 0) |
| 1189 | server->rsize = nfs_block_size(data->rsize, NULL); |
| 1190 | if (data->wsize != 0) |
| 1191 | server->wsize = nfs_block_size(data->wsize, NULL); |
| 1192 | server->flags = data->flags & NFS_MOUNT_FLAGMASK; |
| 1193 | server->caps = NFS_CAP_ATOMIC_OPEN; |
| 1194 | |
| 1195 | server->acregmin = data->acregmin*HZ; |
| 1196 | server->acregmax = data->acregmax*HZ; |
| 1197 | server->acdirmin = data->acdirmin*HZ; |
| 1198 | server->acdirmax = data->acdirmax*HZ; |
| 1199 | |
| 1200 | server->rpc_ops = &nfs_v4_clientops; |
| 1201 | |
| 1202 | nfs_init_timeout_values(&timeparms, data->proto, data->timeo, data->retrans); |
| 1203 | |
| 1204 | server->retrans_timeo = timeparms.to_initval; |
| 1205 | server->retrans_count = timeparms.to_retries; |
| 1206 | |
| 1207 | /* Now create transport and client */ |
| 1208 | authflavour = RPC_AUTH_UNIX; |
| 1209 | if (data->auth_flavourlen != 0) { |
| 1210 | if (data->auth_flavourlen != 1) { |
| 1211 | dprintk("%s: Invalid number of RPC auth flavours %d.\n", |
| 1212 | __FUNCTION__, data->auth_flavourlen); |
| 1213 | err = -EINVAL; |
| 1214 | goto out_fail; |
| 1215 | } |
| 1216 | if (copy_from_user(&authflavour, data->auth_flavours, sizeof(authflavour))) { |
| 1217 | err = -EFAULT; |
| 1218 | goto out_fail; |
| 1219 | } |
| 1220 | } |
| 1221 | |
| 1222 | server->client = nfs4_create_client(server, &timeparms, data->proto, authflavour); |
| 1223 | if (IS_ERR(server->client)) { |
| 1224 | err = PTR_ERR(server->client); |
| 1225 | dprintk("%s: cannot create RPC client. Error = %d\n", |
| 1226 | __FUNCTION__, err); |
| 1227 | goto out_fail; |
| 1228 | } |
| 1229 | |
| 1230 | sb->s_time_gran = 1; |
| 1231 | |
| 1232 | sb->s_op = &nfs4_sops; |
| 1233 | err = nfs_sb_init(sb, authflavour); |
| 1234 | |
| 1235 | out_fail: |
| 1236 | return err; |
| 1237 | } |
| 1238 | |
| 1239 | static int nfs4_compare_super(struct super_block *sb, void *data) |
| 1240 | { |
| 1241 | struct nfs_server *server = data; |
| 1242 | struct nfs_server *old = NFS_SB(sb); |
| 1243 | |
| 1244 | if (strcmp(server->hostname, old->hostname) != 0) |
| 1245 | return 0; |
| 1246 | if (strcmp(server->mnt_path, old->mnt_path) != 0) |
| 1247 | return 0; |
| 1248 | return 1; |
| 1249 | } |
| 1250 | |
| 1251 | static void * |
| 1252 | nfs_copy_user_string(char *dst, struct nfs_string *src, int maxlen) |
| 1253 | { |
| 1254 | void *p = NULL; |
| 1255 | |
| 1256 | if (!src->len) |
| 1257 | return ERR_PTR(-EINVAL); |
| 1258 | if (src->len < maxlen) |
| 1259 | maxlen = src->len; |
| 1260 | if (dst == NULL) { |
| 1261 | p = dst = kmalloc(maxlen + 1, GFP_KERNEL); |
| 1262 | if (p == NULL) |
| 1263 | return ERR_PTR(-ENOMEM); |
| 1264 | } |
| 1265 | if (copy_from_user(dst, src->data, maxlen)) { |
| 1266 | kfree(p); |
| 1267 | return ERR_PTR(-EFAULT); |
| 1268 | } |
| 1269 | dst[maxlen] = '\0'; |
| 1270 | return dst; |
| 1271 | } |
| 1272 | |
Trond Myklebust | 816724e | 2006-06-24 08:41:41 -0400 | [diff] [blame] | 1273 | static int nfs4_get_sb(struct file_system_type *fs_type, |
| 1274 | int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt) |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 1275 | { |
| 1276 | int error; |
| 1277 | struct nfs_server *server; |
| 1278 | struct super_block *s; |
| 1279 | struct nfs4_mount_data *data = raw_data; |
| 1280 | void *p; |
| 1281 | |
| 1282 | if (data == NULL) { |
| 1283 | dprintk("%s: missing data argument\n", __FUNCTION__); |
Trond Myklebust | 816724e | 2006-06-24 08:41:41 -0400 | [diff] [blame] | 1284 | return -EINVAL; |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 1285 | } |
| 1286 | if (data->version <= 0 || data->version > NFS4_MOUNT_VERSION) { |
| 1287 | dprintk("%s: bad mount version\n", __FUNCTION__); |
Trond Myklebust | 816724e | 2006-06-24 08:41:41 -0400 | [diff] [blame] | 1288 | return -EINVAL; |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 1289 | } |
| 1290 | |
| 1291 | server = kzalloc(sizeof(struct nfs_server), GFP_KERNEL); |
| 1292 | if (!server) |
Trond Myklebust | 816724e | 2006-06-24 08:41:41 -0400 | [diff] [blame] | 1293 | return -ENOMEM; |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 1294 | /* Zero out the NFS state stuff */ |
| 1295 | init_nfsv4_state(server); |
| 1296 | server->client = server->client_sys = server->client_acl = ERR_PTR(-EINVAL); |
| 1297 | |
| 1298 | p = nfs_copy_user_string(NULL, &data->hostname, 256); |
| 1299 | if (IS_ERR(p)) |
| 1300 | goto out_err; |
| 1301 | server->hostname = p; |
| 1302 | |
| 1303 | p = nfs_copy_user_string(NULL, &data->mnt_path, 1024); |
| 1304 | if (IS_ERR(p)) |
| 1305 | goto out_err; |
| 1306 | server->mnt_path = p; |
| 1307 | |
| 1308 | p = nfs_copy_user_string(server->ip_addr, &data->client_addr, |
| 1309 | sizeof(server->ip_addr) - 1); |
| 1310 | if (IS_ERR(p)) |
| 1311 | goto out_err; |
| 1312 | |
| 1313 | /* We now require that the mount process passes the remote address */ |
| 1314 | if (data->host_addrlen != sizeof(server->addr)) { |
Trond Myklebust | 816724e | 2006-06-24 08:41:41 -0400 | [diff] [blame] | 1315 | error = -EINVAL; |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 1316 | goto out_free; |
| 1317 | } |
| 1318 | if (copy_from_user(&server->addr, data->host_addr, sizeof(server->addr))) { |
Trond Myklebust | 816724e | 2006-06-24 08:41:41 -0400 | [diff] [blame] | 1319 | error = -EFAULT; |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 1320 | goto out_free; |
| 1321 | } |
| 1322 | if (server->addr.sin_family != AF_INET || |
| 1323 | server->addr.sin_addr.s_addr == INADDR_ANY) { |
| 1324 | dprintk("%s: mount program didn't pass remote IP address!\n", |
| 1325 | __FUNCTION__); |
Trond Myklebust | 816724e | 2006-06-24 08:41:41 -0400 | [diff] [blame] | 1326 | error = -EINVAL; |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 1327 | goto out_free; |
| 1328 | } |
| 1329 | |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 1330 | s = sget(fs_type, nfs4_compare_super, nfs_set_super, server); |
Trond Myklebust | 816724e | 2006-06-24 08:41:41 -0400 | [diff] [blame] | 1331 | if (IS_ERR(s)) { |
| 1332 | error = PTR_ERR(s); |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 1333 | goto out_free; |
Trond Myklebust | 816724e | 2006-06-24 08:41:41 -0400 | [diff] [blame] | 1334 | } |
| 1335 | |
| 1336 | if (s->s_root) { |
| 1337 | kfree(server->mnt_path); |
| 1338 | kfree(server->hostname); |
| 1339 | kfree(server); |
| 1340 | return simple_set_mnt(mnt, s); |
| 1341 | } |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 1342 | |
| 1343 | s->s_flags = flags; |
| 1344 | |
| 1345 | error = nfs4_fill_super(s, data, flags & MS_SILENT ? 1 : 0); |
| 1346 | if (error) { |
| 1347 | up_write(&s->s_umount); |
| 1348 | deactivate_super(s); |
Trond Myklebust | 816724e | 2006-06-24 08:41:41 -0400 | [diff] [blame] | 1349 | return error; |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 1350 | } |
| 1351 | s->s_flags |= MS_ACTIVE; |
Trond Myklebust | 816724e | 2006-06-24 08:41:41 -0400 | [diff] [blame] | 1352 | return simple_set_mnt(mnt, s); |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 1353 | out_err: |
Trond Myklebust | 816724e | 2006-06-24 08:41:41 -0400 | [diff] [blame] | 1354 | error = PTR_ERR(p); |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 1355 | out_free: |
| 1356 | kfree(server->mnt_path); |
| 1357 | kfree(server->hostname); |
| 1358 | kfree(server); |
Trond Myklebust | 816724e | 2006-06-24 08:41:41 -0400 | [diff] [blame] | 1359 | return error; |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 1360 | } |
| 1361 | |
| 1362 | static void nfs4_kill_super(struct super_block *sb) |
| 1363 | { |
| 1364 | struct nfs_server *server = NFS_SB(sb); |
| 1365 | |
| 1366 | nfs_return_all_delegations(sb); |
| 1367 | kill_anon_super(sb); |
| 1368 | |
| 1369 | nfs4_renewd_prepare_shutdown(server); |
| 1370 | |
| 1371 | if (server->client != NULL && !IS_ERR(server->client)) |
| 1372 | rpc_shutdown_client(server->client); |
| 1373 | |
| 1374 | destroy_nfsv4_state(server); |
| 1375 | |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 1376 | nfs_free_iostats(server->io_stats); |
| 1377 | kfree(server->hostname); |
| 1378 | kfree(server); |
| 1379 | nfs_release_automount_timer(); |
| 1380 | } |
| 1381 | |
| 1382 | /* |
| 1383 | * Constructs the SERVER-side path |
| 1384 | */ |
| 1385 | static inline char *nfs4_dup_path(const struct dentry *dentry) |
| 1386 | { |
| 1387 | char *page = (char *) __get_free_page(GFP_USER); |
| 1388 | char *path; |
| 1389 | |
| 1390 | path = nfs4_path(dentry, page, PAGE_SIZE); |
| 1391 | if (!IS_ERR(path)) { |
| 1392 | int len = PAGE_SIZE + page - path; |
| 1393 | char *tmp = path; |
| 1394 | |
| 1395 | path = kmalloc(len, GFP_KERNEL); |
| 1396 | if (path) |
| 1397 | memcpy(path, tmp, len); |
| 1398 | else |
| 1399 | path = ERR_PTR(-ENOMEM); |
| 1400 | } |
| 1401 | free_page((unsigned long)page); |
| 1402 | return path; |
| 1403 | } |
| 1404 | |
| 1405 | static struct super_block *nfs4_clone_sb(struct nfs_server *server, struct nfs_clone_mount *data) |
| 1406 | { |
| 1407 | const struct dentry *dentry = data->dentry; |
David Howells | 7539bba | 2006-08-22 20:06:09 -0400 | [diff] [blame] | 1408 | struct nfs_client *clp = server->nfs_client; |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 1409 | struct super_block *sb; |
| 1410 | |
| 1411 | server->fsid = data->fattr->fsid; |
| 1412 | nfs_copy_fh(&server->fh, data->fh); |
| 1413 | server->mnt_path = nfs4_dup_path(dentry); |
| 1414 | if (IS_ERR(server->mnt_path)) { |
| 1415 | sb = (struct super_block *)server->mnt_path; |
| 1416 | goto err; |
| 1417 | } |
| 1418 | sb = sget(&nfs4_fs_type, nfs4_compare_super, nfs_set_super, server); |
| 1419 | if (IS_ERR(sb) || sb->s_root) |
| 1420 | goto free_path; |
| 1421 | nfs4_server_capabilities(server, &server->fh); |
| 1422 | |
| 1423 | down_write(&clp->cl_sem); |
| 1424 | atomic_inc(&clp->cl_count); |
| 1425 | list_add_tail(&server->nfs4_siblings, &clp->cl_superblocks); |
| 1426 | up_write(&clp->cl_sem); |
| 1427 | return sb; |
| 1428 | free_path: |
| 1429 | kfree(server->mnt_path); |
| 1430 | err: |
| 1431 | server->mnt_path = NULL; |
| 1432 | return sb; |
| 1433 | } |
| 1434 | |
Trond Myklebust | 816724e | 2006-06-24 08:41:41 -0400 | [diff] [blame] | 1435 | static int nfs_clone_nfs4_sb(struct file_system_type *fs_type, |
| 1436 | int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt) |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 1437 | { |
| 1438 | struct nfs_clone_mount *data = raw_data; |
Trond Myklebust | 816724e | 2006-06-24 08:41:41 -0400 | [diff] [blame] | 1439 | return nfs_clone_generic_sb(data, nfs4_clone_sb, nfs_clone_server, mnt); |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 1440 | } |
| 1441 | |
| 1442 | static struct super_block *nfs4_referral_sb(struct nfs_server *server, struct nfs_clone_mount *data) |
| 1443 | { |
| 1444 | struct super_block *sb = ERR_PTR(-ENOMEM); |
| 1445 | int len; |
| 1446 | |
| 1447 | len = strlen(data->mnt_path) + 1; |
| 1448 | server->mnt_path = kmalloc(len, GFP_KERNEL); |
| 1449 | if (server->mnt_path == NULL) |
| 1450 | goto err; |
| 1451 | memcpy(server->mnt_path, data->mnt_path, len); |
| 1452 | memcpy(&server->addr, data->addr, sizeof(struct sockaddr_in)); |
| 1453 | |
| 1454 | sb = sget(&nfs4_fs_type, nfs4_compare_super, nfs_set_super, server); |
| 1455 | if (IS_ERR(sb) || sb->s_root) |
| 1456 | goto free_path; |
| 1457 | return sb; |
| 1458 | free_path: |
| 1459 | kfree(server->mnt_path); |
| 1460 | err: |
| 1461 | server->mnt_path = NULL; |
| 1462 | return sb; |
| 1463 | } |
| 1464 | |
| 1465 | static struct nfs_server *nfs4_referral_server(struct super_block *sb, struct nfs_clone_mount *data) |
| 1466 | { |
| 1467 | struct nfs_server *server = NFS_SB(sb); |
| 1468 | struct rpc_timeout timeparms; |
| 1469 | int proto, timeo, retrans; |
| 1470 | void *err; |
| 1471 | |
| 1472 | proto = IPPROTO_TCP; |
| 1473 | /* Since we are following a referral and there may be alternatives, |
| 1474 | set the timeouts and retries to low values */ |
| 1475 | timeo = 2; |
| 1476 | retrans = 1; |
| 1477 | nfs_init_timeout_values(&timeparms, proto, timeo, retrans); |
| 1478 | |
| 1479 | server->client = nfs4_create_client(server, &timeparms, proto, data->authflavor); |
| 1480 | if (IS_ERR((err = server->client))) |
| 1481 | goto out_err; |
| 1482 | |
| 1483 | sb->s_time_gran = 1; |
| 1484 | sb->s_op = &nfs4_sops; |
| 1485 | err = ERR_PTR(nfs_sb_init(sb, data->authflavor)); |
| 1486 | if (!IS_ERR(err)) |
| 1487 | return server; |
| 1488 | out_err: |
| 1489 | return (struct nfs_server *)err; |
| 1490 | } |
| 1491 | |
Trond Myklebust | 816724e | 2006-06-24 08:41:41 -0400 | [diff] [blame] | 1492 | static int nfs_referral_nfs4_sb(struct file_system_type *fs_type, |
| 1493 | int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt) |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 1494 | { |
| 1495 | struct nfs_clone_mount *data = raw_data; |
Trond Myklebust | 816724e | 2006-06-24 08:41:41 -0400 | [diff] [blame] | 1496 | return nfs_clone_generic_sb(data, nfs4_referral_sb, nfs4_referral_server, mnt); |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 1497 | } |
| 1498 | |
| 1499 | #endif |