Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * linux/fs/nfs/inode.c |
| 3 | * |
| 4 | * Copyright (C) 1992 Rick Sladkey |
| 5 | * |
| 6 | * nfs inode and 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 | */ |
| 15 | |
| 16 | #include <linux/config.h> |
| 17 | #include <linux/module.h> |
| 18 | #include <linux/init.h> |
| 19 | |
| 20 | #include <linux/time.h> |
| 21 | #include <linux/kernel.h> |
| 22 | #include <linux/mm.h> |
| 23 | #include <linux/string.h> |
| 24 | #include <linux/stat.h> |
| 25 | #include <linux/errno.h> |
| 26 | #include <linux/unistd.h> |
| 27 | #include <linux/sunrpc/clnt.h> |
| 28 | #include <linux/sunrpc/stats.h> |
| 29 | #include <linux/nfs_fs.h> |
| 30 | #include <linux/nfs_mount.h> |
| 31 | #include <linux/nfs4_mount.h> |
| 32 | #include <linux/lockd/bind.h> |
| 33 | #include <linux/smp_lock.h> |
| 34 | #include <linux/seq_file.h> |
| 35 | #include <linux/mount.h> |
| 36 | #include <linux/nfs_idmap.h> |
| 37 | #include <linux/vfs.h> |
| 38 | |
| 39 | #include <asm/system.h> |
| 40 | #include <asm/uaccess.h> |
| 41 | |
Trond Myklebust | 4ce7971 | 2005-06-22 17:16:21 +0000 | [diff] [blame] | 42 | #include "nfs4_fs.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | #include "delegation.h" |
| 44 | |
| 45 | #define NFSDBG_FACILITY NFSDBG_VFS |
| 46 | #define NFS_PARANOIA 1 |
| 47 | |
| 48 | /* Maximum number of readahead requests |
| 49 | * FIXME: this should really be a sysctl so that users may tune it to suit |
| 50 | * their needs. People that do NFS over a slow network, might for |
| 51 | * instance want to reduce it to something closer to 1 for improved |
| 52 | * interactive response. |
| 53 | */ |
| 54 | #define NFS_MAX_READAHEAD (RPC_DEF_SLOT_TABLE - 1) |
| 55 | |
| 56 | static void nfs_invalidate_inode(struct inode *); |
| 57 | static int nfs_update_inode(struct inode *, struct nfs_fattr *, unsigned long); |
| 58 | |
| 59 | static struct inode *nfs_alloc_inode(struct super_block *sb); |
| 60 | static void nfs_destroy_inode(struct inode *); |
| 61 | static int nfs_write_inode(struct inode *,int); |
| 62 | static void nfs_delete_inode(struct inode *); |
| 63 | static void nfs_clear_inode(struct inode *); |
| 64 | static void nfs_umount_begin(struct super_block *); |
| 65 | static int nfs_statfs(struct super_block *, struct kstatfs *); |
| 66 | static int nfs_show_options(struct seq_file *, struct vfsmount *); |
Trond Myklebust | ada70d9 | 2005-06-22 17:16:22 +0000 | [diff] [blame] | 67 | static void nfs_zap_acl_cache(struct inode *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 68 | |
| 69 | static struct rpc_program nfs_program; |
| 70 | |
| 71 | static struct super_operations nfs_sops = { |
| 72 | .alloc_inode = nfs_alloc_inode, |
| 73 | .destroy_inode = nfs_destroy_inode, |
| 74 | .write_inode = nfs_write_inode, |
| 75 | .delete_inode = nfs_delete_inode, |
| 76 | .statfs = nfs_statfs, |
| 77 | .clear_inode = nfs_clear_inode, |
| 78 | .umount_begin = nfs_umount_begin, |
| 79 | .show_options = nfs_show_options, |
| 80 | }; |
| 81 | |
| 82 | /* |
| 83 | * RPC cruft for NFS |
| 84 | */ |
| 85 | static struct rpc_stat nfs_rpcstat = { |
| 86 | .program = &nfs_program |
| 87 | }; |
| 88 | static struct rpc_version * nfs_version[] = { |
| 89 | NULL, |
| 90 | NULL, |
| 91 | &nfs_version2, |
| 92 | #if defined(CONFIG_NFS_V3) |
| 93 | &nfs_version3, |
| 94 | #elif defined(CONFIG_NFS_V4) |
| 95 | NULL, |
| 96 | #endif |
| 97 | #if defined(CONFIG_NFS_V4) |
| 98 | &nfs_version4, |
| 99 | #endif |
| 100 | }; |
| 101 | |
| 102 | static struct rpc_program nfs_program = { |
| 103 | .name = "nfs", |
| 104 | .number = NFS_PROGRAM, |
| 105 | .nrvers = sizeof(nfs_version) / sizeof(nfs_version[0]), |
| 106 | .version = nfs_version, |
| 107 | .stats = &nfs_rpcstat, |
| 108 | .pipe_dir_name = "/nfs", |
| 109 | }; |
| 110 | |
Andreas Gruenbacher | b7fa055 | 2005-06-22 17:16:27 +0000 | [diff] [blame] | 111 | #ifdef CONFIG_NFS_V3_ACL |
| 112 | static struct rpc_stat nfsacl_rpcstat = { &nfsacl_program }; |
| 113 | static struct rpc_version * nfsacl_version[] = { |
| 114 | [3] = &nfsacl_version3, |
| 115 | }; |
| 116 | |
| 117 | struct rpc_program nfsacl_program = { |
| 118 | .name = "nfsacl", |
| 119 | .number = NFS_ACL_PROGRAM, |
| 120 | .nrvers = sizeof(nfsacl_version) / sizeof(nfsacl_version[0]), |
| 121 | .version = nfsacl_version, |
| 122 | .stats = &nfsacl_rpcstat, |
| 123 | }; |
| 124 | #endif /* CONFIG_NFS_V3_ACL */ |
| 125 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 126 | static inline unsigned long |
| 127 | nfs_fattr_to_ino_t(struct nfs_fattr *fattr) |
| 128 | { |
| 129 | return nfs_fileid_to_ino_t(fattr->fileid); |
| 130 | } |
| 131 | |
| 132 | static int |
| 133 | nfs_write_inode(struct inode *inode, int sync) |
| 134 | { |
| 135 | int flags = sync ? FLUSH_WAIT : 0; |
| 136 | int ret; |
| 137 | |
Trond Myklebust | 3da28eb | 2005-06-22 17:16:31 +0000 | [diff] [blame^] | 138 | ret = nfs_commit_inode(inode, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 139 | if (ret < 0) |
| 140 | return ret; |
| 141 | return 0; |
| 142 | } |
| 143 | |
| 144 | static void |
| 145 | nfs_delete_inode(struct inode * inode) |
| 146 | { |
| 147 | dprintk("NFS: delete_inode(%s/%ld)\n", inode->i_sb->s_id, inode->i_ino); |
| 148 | |
| 149 | nfs_wb_all(inode); |
| 150 | /* |
| 151 | * The following should never happen... |
| 152 | */ |
| 153 | if (nfs_have_writebacks(inode)) { |
| 154 | printk(KERN_ERR "nfs_delete_inode: inode %ld has pending RPC requests\n", inode->i_ino); |
| 155 | } |
| 156 | |
| 157 | clear_inode(inode); |
| 158 | } |
| 159 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 160 | static void |
| 161 | nfs_clear_inode(struct inode *inode) |
| 162 | { |
| 163 | struct nfs_inode *nfsi = NFS_I(inode); |
| 164 | struct rpc_cred *cred; |
| 165 | |
| 166 | nfs_wb_all(inode); |
| 167 | BUG_ON (!list_empty(&nfsi->open_files)); |
Trond Myklebust | ada70d9 | 2005-06-22 17:16:22 +0000 | [diff] [blame] | 168 | nfs_zap_acl_cache(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 169 | cred = nfsi->cache_access.cred; |
| 170 | if (cred) |
| 171 | put_rpccred(cred); |
| 172 | BUG_ON(atomic_read(&nfsi->data_updates) != 0); |
| 173 | } |
| 174 | |
| 175 | void |
| 176 | nfs_umount_begin(struct super_block *sb) |
| 177 | { |
J. Bruce Fields | 6a19275 | 2005-06-22 17:16:23 +0000 | [diff] [blame] | 178 | struct rpc_clnt *rpc = NFS_SB(sb)->client; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 179 | |
| 180 | /* -EIO all pending I/O */ |
J. Bruce Fields | 6a19275 | 2005-06-22 17:16:23 +0000 | [diff] [blame] | 181 | if (!IS_ERR(rpc)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 182 | rpc_killall_tasks(rpc); |
Andreas Gruenbacher | b7fa055 | 2005-06-22 17:16:27 +0000 | [diff] [blame] | 183 | rpc = NFS_SB(sb)->client_acl; |
| 184 | if (!IS_ERR(rpc)) |
| 185 | rpc_killall_tasks(rpc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 186 | } |
| 187 | |
| 188 | |
| 189 | static inline unsigned long |
| 190 | nfs_block_bits(unsigned long bsize, unsigned char *nrbitsp) |
| 191 | { |
| 192 | /* make sure blocksize is a power of two */ |
| 193 | if ((bsize & (bsize - 1)) || nrbitsp) { |
| 194 | unsigned char nrbits; |
| 195 | |
| 196 | for (nrbits = 31; nrbits && !(bsize & (1 << nrbits)); nrbits--) |
| 197 | ; |
| 198 | bsize = 1 << nrbits; |
| 199 | if (nrbitsp) |
| 200 | *nrbitsp = nrbits; |
| 201 | } |
| 202 | |
| 203 | return bsize; |
| 204 | } |
| 205 | |
| 206 | /* |
| 207 | * Calculate the number of 512byte blocks used. |
| 208 | */ |
| 209 | static inline unsigned long |
| 210 | nfs_calc_block_size(u64 tsize) |
| 211 | { |
| 212 | loff_t used = (tsize + 511) >> 9; |
| 213 | return (used > ULONG_MAX) ? ULONG_MAX : used; |
| 214 | } |
| 215 | |
| 216 | /* |
| 217 | * Compute and set NFS server blocksize |
| 218 | */ |
| 219 | static inline unsigned long |
| 220 | nfs_block_size(unsigned long bsize, unsigned char *nrbitsp) |
| 221 | { |
| 222 | if (bsize < 1024) |
| 223 | bsize = NFS_DEF_FILE_IO_BUFFER_SIZE; |
| 224 | else if (bsize >= NFS_MAX_FILE_IO_BUFFER_SIZE) |
| 225 | bsize = NFS_MAX_FILE_IO_BUFFER_SIZE; |
| 226 | |
| 227 | return nfs_block_bits(bsize, nrbitsp); |
| 228 | } |
| 229 | |
| 230 | /* |
| 231 | * Obtain the root inode of the file system. |
| 232 | */ |
| 233 | static struct inode * |
| 234 | nfs_get_root(struct super_block *sb, struct nfs_fh *rootfh, struct nfs_fsinfo *fsinfo) |
| 235 | { |
| 236 | struct nfs_server *server = NFS_SB(sb); |
| 237 | struct inode *rooti; |
| 238 | int error; |
| 239 | |
| 240 | error = server->rpc_ops->getroot(server, rootfh, fsinfo); |
| 241 | if (error < 0) { |
| 242 | dprintk("nfs_get_root: getattr error = %d\n", -error); |
| 243 | return ERR_PTR(error); |
| 244 | } |
| 245 | |
| 246 | rooti = nfs_fhget(sb, rootfh, fsinfo->fattr); |
| 247 | if (!rooti) |
| 248 | return ERR_PTR(-ENOMEM); |
| 249 | return rooti; |
| 250 | } |
| 251 | |
| 252 | /* |
| 253 | * Do NFS version-independent mount processing, and sanity checking |
| 254 | */ |
| 255 | static int |
| 256 | nfs_sb_init(struct super_block *sb, rpc_authflavor_t authflavor) |
| 257 | { |
| 258 | struct nfs_server *server; |
| 259 | struct inode *root_inode; |
| 260 | struct nfs_fattr fattr; |
| 261 | struct nfs_fsinfo fsinfo = { |
| 262 | .fattr = &fattr, |
| 263 | }; |
| 264 | struct nfs_pathconf pathinfo = { |
| 265 | .fattr = &fattr, |
| 266 | }; |
| 267 | int no_root_error = 0; |
| 268 | unsigned long max_rpc_payload; |
| 269 | |
| 270 | /* We probably want something more informative here */ |
| 271 | snprintf(sb->s_id, sizeof(sb->s_id), "%x:%x", MAJOR(sb->s_dev), MINOR(sb->s_dev)); |
| 272 | |
| 273 | server = NFS_SB(sb); |
| 274 | |
| 275 | sb->s_magic = NFS_SUPER_MAGIC; |
| 276 | |
| 277 | root_inode = nfs_get_root(sb, &server->fh, &fsinfo); |
| 278 | /* Did getting the root inode fail? */ |
| 279 | if (IS_ERR(root_inode)) { |
| 280 | no_root_error = PTR_ERR(root_inode); |
| 281 | goto out_no_root; |
| 282 | } |
| 283 | sb->s_root = d_alloc_root(root_inode); |
| 284 | if (!sb->s_root) { |
| 285 | no_root_error = -ENOMEM; |
| 286 | goto out_no_root; |
| 287 | } |
| 288 | sb->s_root->d_op = server->rpc_ops->dentry_ops; |
| 289 | |
| 290 | /* Get some general file system info */ |
| 291 | if (server->namelen == 0 && |
| 292 | server->rpc_ops->pathconf(server, &server->fh, &pathinfo) >= 0) |
| 293 | server->namelen = pathinfo.max_namelen; |
| 294 | /* Work out a lot of parameters */ |
| 295 | if (server->rsize == 0) |
| 296 | server->rsize = nfs_block_size(fsinfo.rtpref, NULL); |
| 297 | if (server->wsize == 0) |
| 298 | server->wsize = nfs_block_size(fsinfo.wtpref, NULL); |
| 299 | |
| 300 | if (fsinfo.rtmax >= 512 && server->rsize > fsinfo.rtmax) |
| 301 | server->rsize = nfs_block_size(fsinfo.rtmax, NULL); |
| 302 | if (fsinfo.wtmax >= 512 && server->wsize > fsinfo.wtmax) |
| 303 | server->wsize = nfs_block_size(fsinfo.wtmax, NULL); |
| 304 | |
| 305 | max_rpc_payload = nfs_block_size(rpc_max_payload(server->client), NULL); |
| 306 | if (server->rsize > max_rpc_payload) |
| 307 | server->rsize = max_rpc_payload; |
| 308 | if (server->wsize > max_rpc_payload) |
| 309 | server->wsize = max_rpc_payload; |
| 310 | |
| 311 | server->rpages = (server->rsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; |
| 312 | if (server->rpages > NFS_READ_MAXIOV) { |
| 313 | server->rpages = NFS_READ_MAXIOV; |
| 314 | server->rsize = server->rpages << PAGE_CACHE_SHIFT; |
| 315 | } |
| 316 | |
| 317 | server->wpages = (server->wsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; |
| 318 | if (server->wpages > NFS_WRITE_MAXIOV) { |
| 319 | server->wpages = NFS_WRITE_MAXIOV; |
| 320 | server->wsize = server->wpages << PAGE_CACHE_SHIFT; |
| 321 | } |
| 322 | |
| 323 | if (sb->s_blocksize == 0) |
| 324 | sb->s_blocksize = nfs_block_bits(server->wsize, |
| 325 | &sb->s_blocksize_bits); |
| 326 | server->wtmult = nfs_block_bits(fsinfo.wtmult, NULL); |
| 327 | |
| 328 | server->dtsize = nfs_block_size(fsinfo.dtpref, NULL); |
| 329 | if (server->dtsize > PAGE_CACHE_SIZE) |
| 330 | server->dtsize = PAGE_CACHE_SIZE; |
| 331 | if (server->dtsize > server->rsize) |
| 332 | server->dtsize = server->rsize; |
| 333 | |
| 334 | if (server->flags & NFS_MOUNT_NOAC) { |
| 335 | server->acregmin = server->acregmax = 0; |
| 336 | server->acdirmin = server->acdirmax = 0; |
| 337 | sb->s_flags |= MS_SYNCHRONOUS; |
| 338 | } |
| 339 | server->backing_dev_info.ra_pages = server->rpages * NFS_MAX_READAHEAD; |
| 340 | |
| 341 | sb->s_maxbytes = fsinfo.maxfilesize; |
| 342 | if (sb->s_maxbytes > MAX_LFS_FILESIZE) |
| 343 | sb->s_maxbytes = MAX_LFS_FILESIZE; |
| 344 | |
| 345 | server->client->cl_intr = (server->flags & NFS_MOUNT_INTR) ? 1 : 0; |
| 346 | server->client->cl_softrtry = (server->flags & NFS_MOUNT_SOFT) ? 1 : 0; |
| 347 | |
| 348 | /* We're airborne Set socket buffersize */ |
| 349 | rpc_setbufsize(server->client, server->wsize + 100, server->rsize + 100); |
| 350 | return 0; |
| 351 | /* Yargs. It didn't work out. */ |
| 352 | out_no_root: |
| 353 | dprintk("nfs_sb_init: get root inode failed: errno %d\n", -no_root_error); |
| 354 | if (!IS_ERR(root_inode)) |
| 355 | iput(root_inode); |
| 356 | return no_root_error; |
| 357 | } |
| 358 | |
| 359 | /* |
| 360 | * Create an RPC client handle. |
| 361 | */ |
| 362 | static struct rpc_clnt * |
| 363 | nfs_create_client(struct nfs_server *server, const struct nfs_mount_data *data) |
| 364 | { |
| 365 | struct rpc_timeout timeparms; |
| 366 | struct rpc_xprt *xprt = NULL; |
| 367 | struct rpc_clnt *clnt = NULL; |
| 368 | int tcp = (data->flags & NFS_MOUNT_TCP); |
| 369 | |
| 370 | /* Initialize timeout values */ |
| 371 | timeparms.to_initval = data->timeo * HZ / 10; |
| 372 | timeparms.to_retries = data->retrans; |
| 373 | timeparms.to_maxval = tcp ? RPC_MAX_TCP_TIMEOUT : RPC_MAX_UDP_TIMEOUT; |
| 374 | timeparms.to_exponential = 1; |
| 375 | |
| 376 | if (!timeparms.to_initval) |
| 377 | timeparms.to_initval = (tcp ? 600 : 11) * HZ / 10; |
| 378 | if (!timeparms.to_retries) |
| 379 | timeparms.to_retries = 5; |
| 380 | |
| 381 | /* create transport and client */ |
| 382 | xprt = xprt_create_proto(tcp ? IPPROTO_TCP : IPPROTO_UDP, |
| 383 | &server->addr, &timeparms); |
| 384 | if (IS_ERR(xprt)) { |
Trond Myklebust | 9085bbc | 2005-06-22 17:16:20 +0000 | [diff] [blame] | 385 | dprintk("%s: cannot create RPC transport. Error = %ld\n", |
| 386 | __FUNCTION__, PTR_ERR(xprt)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 387 | return (struct rpc_clnt *)xprt; |
| 388 | } |
| 389 | clnt = rpc_create_client(xprt, server->hostname, &nfs_program, |
| 390 | server->rpc_ops->version, data->pseudoflavor); |
| 391 | if (IS_ERR(clnt)) { |
Trond Myklebust | 9085bbc | 2005-06-22 17:16:20 +0000 | [diff] [blame] | 392 | dprintk("%s: cannot create RPC client. Error = %ld\n", |
| 393 | __FUNCTION__, PTR_ERR(xprt)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 394 | goto out_fail; |
| 395 | } |
| 396 | |
| 397 | clnt->cl_intr = 1; |
| 398 | clnt->cl_softrtry = 1; |
| 399 | clnt->cl_chatty = 1; |
| 400 | |
| 401 | return clnt; |
| 402 | |
| 403 | out_fail: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 404 | return clnt; |
| 405 | } |
| 406 | |
| 407 | /* |
| 408 | * The way this works is that the mount process passes a structure |
| 409 | * in the data argument which contains the server's IP address |
| 410 | * and the root file handle obtained from the server's mount |
| 411 | * daemon. We stash these away in the private superblock fields. |
| 412 | */ |
| 413 | static int |
| 414 | nfs_fill_super(struct super_block *sb, struct nfs_mount_data *data, int silent) |
| 415 | { |
| 416 | struct nfs_server *server; |
| 417 | rpc_authflavor_t authflavor; |
| 418 | |
| 419 | server = NFS_SB(sb); |
| 420 | sb->s_blocksize_bits = 0; |
| 421 | sb->s_blocksize = 0; |
| 422 | if (data->bsize) |
| 423 | sb->s_blocksize = nfs_block_size(data->bsize, &sb->s_blocksize_bits); |
| 424 | if (data->rsize) |
| 425 | server->rsize = nfs_block_size(data->rsize, NULL); |
| 426 | if (data->wsize) |
| 427 | server->wsize = nfs_block_size(data->wsize, NULL); |
| 428 | server->flags = data->flags & NFS_MOUNT_FLAGMASK; |
| 429 | |
| 430 | server->acregmin = data->acregmin*HZ; |
| 431 | server->acregmax = data->acregmax*HZ; |
| 432 | server->acdirmin = data->acdirmin*HZ; |
| 433 | server->acdirmax = data->acdirmax*HZ; |
| 434 | |
| 435 | /* Start lockd here, before we might error out */ |
| 436 | if (!(server->flags & NFS_MOUNT_NONLM)) |
| 437 | lockd_up(); |
| 438 | |
| 439 | server->namelen = data->namlen; |
| 440 | server->hostname = kmalloc(strlen(data->hostname) + 1, GFP_KERNEL); |
| 441 | if (!server->hostname) |
| 442 | return -ENOMEM; |
| 443 | strcpy(server->hostname, data->hostname); |
| 444 | |
| 445 | /* Check NFS protocol revision and initialize RPC op vector |
| 446 | * and file handle pool. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 447 | #ifdef CONFIG_NFS_V3 |
Trond Myklebust | 9085bbc | 2005-06-22 17:16:20 +0000 | [diff] [blame] | 448 | if (server->flags & NFS_MOUNT_VER3) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 449 | server->rpc_ops = &nfs_v3_clientops; |
| 450 | server->caps |= NFS_CAP_READDIRPLUS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 451 | } else { |
| 452 | server->rpc_ops = &nfs_v2_clientops; |
| 453 | } |
Trond Myklebust | 9085bbc | 2005-06-22 17:16:20 +0000 | [diff] [blame] | 454 | #else |
| 455 | server->rpc_ops = &nfs_v2_clientops; |
| 456 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 457 | |
| 458 | /* Fill in pseudoflavor for mount version < 5 */ |
| 459 | if (!(data->flags & NFS_MOUNT_SECFLAVOUR)) |
| 460 | data->pseudoflavor = RPC_AUTH_UNIX; |
| 461 | authflavor = data->pseudoflavor; /* save for sb_init() */ |
| 462 | /* XXX maybe we want to add a server->pseudoflavor field */ |
| 463 | |
| 464 | /* Create RPC client handles */ |
| 465 | server->client = nfs_create_client(server, data); |
| 466 | if (IS_ERR(server->client)) |
| 467 | return PTR_ERR(server->client); |
| 468 | /* RFC 2623, sec 2.3.2 */ |
| 469 | if (authflavor != RPC_AUTH_UNIX) { |
J. Bruce Fields | 6a19275 | 2005-06-22 17:16:23 +0000 | [diff] [blame] | 470 | struct rpc_auth *auth; |
| 471 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 472 | server->client_sys = rpc_clone_client(server->client); |
| 473 | if (IS_ERR(server->client_sys)) |
| 474 | return PTR_ERR(server->client_sys); |
J. Bruce Fields | 6a19275 | 2005-06-22 17:16:23 +0000 | [diff] [blame] | 475 | auth = rpcauth_create(RPC_AUTH_UNIX, server->client_sys); |
| 476 | if (IS_ERR(auth)) |
| 477 | return PTR_ERR(auth); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 478 | } else { |
| 479 | atomic_inc(&server->client->cl_count); |
| 480 | server->client_sys = server->client; |
| 481 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 482 | if (server->flags & NFS_MOUNT_VER3) { |
Andreas Gruenbacher | b7fa055 | 2005-06-22 17:16:27 +0000 | [diff] [blame] | 483 | #ifdef CONFIG_NFS_V3_ACL |
| 484 | if (!(server->flags & NFS_MOUNT_NOACL)) { |
| 485 | server->client_acl = rpc_bind_new_program(server->client, &nfsacl_program, 3); |
| 486 | /* No errors! Assume that Sun nfsacls are supported */ |
| 487 | if (!IS_ERR(server->client_acl)) |
| 488 | server->caps |= NFS_CAP_ACLS; |
| 489 | } |
| 490 | #else |
| 491 | server->flags &= ~NFS_MOUNT_NOACL; |
| 492 | #endif /* CONFIG_NFS_V3_ACL */ |
Andreas Gruenbacher | 055ffbe | 2005-06-22 17:16:27 +0000 | [diff] [blame] | 493 | /* |
| 494 | * The VFS shouldn't apply the umask to mode bits. We will |
| 495 | * do so ourselves when necessary. |
| 496 | */ |
| 497 | sb->s_flags |= MS_POSIXACL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 498 | if (server->namelen == 0 || server->namelen > NFS3_MAXNAMLEN) |
| 499 | server->namelen = NFS3_MAXNAMLEN; |
| 500 | sb->s_time_gran = 1; |
| 501 | } else { |
| 502 | if (server->namelen == 0 || server->namelen > NFS2_MAXNAMLEN) |
| 503 | server->namelen = NFS2_MAXNAMLEN; |
| 504 | } |
| 505 | |
| 506 | sb->s_op = &nfs_sops; |
| 507 | return nfs_sb_init(sb, authflavor); |
| 508 | } |
| 509 | |
| 510 | static int |
| 511 | nfs_statfs(struct super_block *sb, struct kstatfs *buf) |
| 512 | { |
| 513 | struct nfs_server *server = NFS_SB(sb); |
| 514 | unsigned char blockbits; |
| 515 | unsigned long blockres; |
| 516 | struct nfs_fh *rootfh = NFS_FH(sb->s_root->d_inode); |
| 517 | struct nfs_fattr fattr; |
| 518 | struct nfs_fsstat res = { |
| 519 | .fattr = &fattr, |
| 520 | }; |
| 521 | int error; |
| 522 | |
| 523 | lock_kernel(); |
| 524 | |
| 525 | error = server->rpc_ops->statfs(server, rootfh, &res); |
| 526 | buf->f_type = NFS_SUPER_MAGIC; |
| 527 | if (error < 0) |
| 528 | goto out_err; |
| 529 | |
| 530 | /* |
| 531 | * Current versions of glibc do not correctly handle the |
| 532 | * case where f_frsize != f_bsize. Eventually we want to |
| 533 | * report the value of wtmult in this field. |
| 534 | */ |
| 535 | buf->f_frsize = sb->s_blocksize; |
| 536 | |
| 537 | /* |
| 538 | * On most *nix systems, f_blocks, f_bfree, and f_bavail |
| 539 | * are reported in units of f_frsize. Linux hasn't had |
| 540 | * an f_frsize field in its statfs struct until recently, |
| 541 | * thus historically Linux's sys_statfs reports these |
| 542 | * fields in units of f_bsize. |
| 543 | */ |
| 544 | buf->f_bsize = sb->s_blocksize; |
| 545 | blockbits = sb->s_blocksize_bits; |
| 546 | blockres = (1 << blockbits) - 1; |
| 547 | buf->f_blocks = (res.tbytes + blockres) >> blockbits; |
| 548 | buf->f_bfree = (res.fbytes + blockres) >> blockbits; |
| 549 | buf->f_bavail = (res.abytes + blockres) >> blockbits; |
| 550 | |
| 551 | buf->f_files = res.tfiles; |
| 552 | buf->f_ffree = res.afiles; |
| 553 | |
| 554 | buf->f_namelen = server->namelen; |
| 555 | out: |
| 556 | unlock_kernel(); |
| 557 | |
| 558 | return 0; |
| 559 | |
| 560 | out_err: |
| 561 | printk(KERN_WARNING "nfs_statfs: statfs error = %d\n", -error); |
| 562 | buf->f_bsize = buf->f_blocks = buf->f_bfree = buf->f_bavail = -1; |
| 563 | goto out; |
| 564 | |
| 565 | } |
| 566 | |
| 567 | static int nfs_show_options(struct seq_file *m, struct vfsmount *mnt) |
| 568 | { |
| 569 | static struct proc_nfs_info { |
| 570 | int flag; |
| 571 | char *str; |
| 572 | char *nostr; |
| 573 | } nfs_info[] = { |
| 574 | { NFS_MOUNT_SOFT, ",soft", ",hard" }, |
| 575 | { NFS_MOUNT_INTR, ",intr", "" }, |
| 576 | { NFS_MOUNT_POSIX, ",posix", "" }, |
| 577 | { NFS_MOUNT_TCP, ",tcp", ",udp" }, |
| 578 | { NFS_MOUNT_NOCTO, ",nocto", "" }, |
| 579 | { NFS_MOUNT_NOAC, ",noac", "" }, |
| 580 | { NFS_MOUNT_NONLM, ",nolock", ",lock" }, |
Andreas Gruenbacher | b7fa055 | 2005-06-22 17:16:27 +0000 | [diff] [blame] | 581 | { NFS_MOUNT_NOACL, ",noacl", "" }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 582 | { 0, NULL, NULL } |
| 583 | }; |
| 584 | struct proc_nfs_info *nfs_infop; |
| 585 | struct nfs_server *nfss = NFS_SB(mnt->mnt_sb); |
| 586 | |
| 587 | seq_printf(m, ",v%d", nfss->rpc_ops->version); |
| 588 | seq_printf(m, ",rsize=%d", nfss->rsize); |
| 589 | seq_printf(m, ",wsize=%d", nfss->wsize); |
| 590 | if (nfss->acregmin != 3*HZ) |
| 591 | seq_printf(m, ",acregmin=%d", nfss->acregmin/HZ); |
| 592 | if (nfss->acregmax != 60*HZ) |
| 593 | seq_printf(m, ",acregmax=%d", nfss->acregmax/HZ); |
| 594 | if (nfss->acdirmin != 30*HZ) |
| 595 | seq_printf(m, ",acdirmin=%d", nfss->acdirmin/HZ); |
| 596 | if (nfss->acdirmax != 60*HZ) |
| 597 | seq_printf(m, ",acdirmax=%d", nfss->acdirmax/HZ); |
| 598 | for (nfs_infop = nfs_info; nfs_infop->flag; nfs_infop++) { |
| 599 | if (nfss->flags & nfs_infop->flag) |
| 600 | seq_puts(m, nfs_infop->str); |
| 601 | else |
| 602 | seq_puts(m, nfs_infop->nostr); |
| 603 | } |
| 604 | seq_puts(m, ",addr="); |
| 605 | seq_escape(m, nfss->hostname, " \t\n\\"); |
| 606 | return 0; |
| 607 | } |
| 608 | |
| 609 | /* |
| 610 | * Invalidate the local caches |
| 611 | */ |
| 612 | void |
| 613 | nfs_zap_caches(struct inode *inode) |
| 614 | { |
| 615 | struct nfs_inode *nfsi = NFS_I(inode); |
| 616 | int mode = inode->i_mode; |
| 617 | |
| 618 | NFS_ATTRTIMEO(inode) = NFS_MINATTRTIMEO(inode); |
| 619 | NFS_ATTRTIMEO_UPDATE(inode) = jiffies; |
| 620 | |
| 621 | memset(NFS_COOKIEVERF(inode), 0, sizeof(NFS_COOKIEVERF(inode))); |
| 622 | if (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode)) |
Trond Myklebust | fe51bee | 2005-06-22 17:16:30 +0000 | [diff] [blame] | 623 | nfsi->flags |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL|NFS_INO_REVAL_PAGECACHE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 624 | else |
Trond Myklebust | fe51bee | 2005-06-22 17:16:30 +0000 | [diff] [blame] | 625 | nfsi->flags |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL|NFS_INO_REVAL_PAGECACHE; |
Trond Myklebust | ada70d9 | 2005-06-22 17:16:22 +0000 | [diff] [blame] | 626 | } |
| 627 | |
| 628 | static void nfs_zap_acl_cache(struct inode *inode) |
| 629 | { |
| 630 | void (*clear_acl_cache)(struct inode *); |
| 631 | |
| 632 | clear_acl_cache = NFS_PROTO(inode)->clear_acl_cache; |
| 633 | if (clear_acl_cache != NULL) |
| 634 | clear_acl_cache(inode); |
| 635 | NFS_I(inode)->flags &= ~NFS_INO_INVALID_ACL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 636 | } |
| 637 | |
| 638 | /* |
| 639 | * Invalidate, but do not unhash, the inode |
| 640 | */ |
| 641 | static void |
| 642 | nfs_invalidate_inode(struct inode *inode) |
| 643 | { |
| 644 | umode_t save_mode = inode->i_mode; |
| 645 | |
| 646 | make_bad_inode(inode); |
| 647 | inode->i_mode = save_mode; |
| 648 | nfs_zap_caches(inode); |
| 649 | } |
| 650 | |
| 651 | struct nfs_find_desc { |
| 652 | struct nfs_fh *fh; |
| 653 | struct nfs_fattr *fattr; |
| 654 | }; |
| 655 | |
| 656 | /* |
| 657 | * In NFSv3 we can have 64bit inode numbers. In order to support |
| 658 | * this, and re-exported directories (also seen in NFSv2) |
| 659 | * we are forced to allow 2 different inodes to have the same |
| 660 | * i_ino. |
| 661 | */ |
| 662 | static int |
| 663 | nfs_find_actor(struct inode *inode, void *opaque) |
| 664 | { |
| 665 | struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque; |
| 666 | struct nfs_fh *fh = desc->fh; |
| 667 | struct nfs_fattr *fattr = desc->fattr; |
| 668 | |
| 669 | if (NFS_FILEID(inode) != fattr->fileid) |
| 670 | return 0; |
| 671 | if (nfs_compare_fh(NFS_FH(inode), fh)) |
| 672 | return 0; |
| 673 | if (is_bad_inode(inode) || NFS_STALE(inode)) |
| 674 | return 0; |
| 675 | return 1; |
| 676 | } |
| 677 | |
| 678 | static int |
| 679 | nfs_init_locked(struct inode *inode, void *opaque) |
| 680 | { |
| 681 | struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque; |
| 682 | struct nfs_fattr *fattr = desc->fattr; |
| 683 | |
| 684 | NFS_FILEID(inode) = fattr->fileid; |
| 685 | nfs_copy_fh(NFS_FH(inode), desc->fh); |
| 686 | return 0; |
| 687 | } |
| 688 | |
| 689 | /* Don't use READDIRPLUS on directories that we believe are too large */ |
| 690 | #define NFS_LIMIT_READDIRPLUS (8*PAGE_SIZE) |
| 691 | |
| 692 | /* |
| 693 | * This is our front-end to iget that looks up inodes by file handle |
| 694 | * instead of inode number. |
| 695 | */ |
| 696 | struct inode * |
| 697 | nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr) |
| 698 | { |
| 699 | struct nfs_find_desc desc = { |
| 700 | .fh = fh, |
| 701 | .fattr = fattr |
| 702 | }; |
| 703 | struct inode *inode = NULL; |
| 704 | unsigned long hash; |
| 705 | |
| 706 | if ((fattr->valid & NFS_ATTR_FATTR) == 0) |
| 707 | goto out_no_inode; |
| 708 | |
| 709 | if (!fattr->nlink) { |
| 710 | printk("NFS: Buggy server - nlink == 0!\n"); |
| 711 | goto out_no_inode; |
| 712 | } |
| 713 | |
| 714 | hash = nfs_fattr_to_ino_t(fattr); |
| 715 | |
| 716 | if (!(inode = iget5_locked(sb, hash, nfs_find_actor, nfs_init_locked, &desc))) |
| 717 | goto out_no_inode; |
| 718 | |
| 719 | if (inode->i_state & I_NEW) { |
| 720 | struct nfs_inode *nfsi = NFS_I(inode); |
| 721 | |
| 722 | /* We set i_ino for the few things that still rely on it, |
| 723 | * such as stat(2) */ |
| 724 | inode->i_ino = hash; |
| 725 | |
| 726 | /* We can't support update_atime(), since the server will reset it */ |
| 727 | inode->i_flags |= S_NOATIME|S_NOCMTIME; |
| 728 | inode->i_mode = fattr->mode; |
| 729 | /* Why so? Because we want revalidate for devices/FIFOs, and |
| 730 | * that's precisely what we have in nfs_file_inode_operations. |
| 731 | */ |
J. Bruce Fields | 92cfc62 | 2005-06-22 17:16:22 +0000 | [diff] [blame] | 732 | inode->i_op = NFS_SB(sb)->rpc_ops->file_inode_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 733 | if (S_ISREG(inode->i_mode)) { |
| 734 | inode->i_fop = &nfs_file_operations; |
| 735 | inode->i_data.a_ops = &nfs_file_aops; |
| 736 | inode->i_data.backing_dev_info = &NFS_SB(sb)->backing_dev_info; |
| 737 | } else if (S_ISDIR(inode->i_mode)) { |
| 738 | inode->i_op = NFS_SB(sb)->rpc_ops->dir_inode_ops; |
| 739 | inode->i_fop = &nfs_dir_operations; |
| 740 | if (nfs_server_capable(inode, NFS_CAP_READDIRPLUS) |
| 741 | && fattr->size <= NFS_LIMIT_READDIRPLUS) |
| 742 | NFS_FLAGS(inode) |= NFS_INO_ADVISE_RDPLUS; |
| 743 | } else if (S_ISLNK(inode->i_mode)) |
| 744 | inode->i_op = &nfs_symlink_inode_operations; |
| 745 | else |
| 746 | init_special_inode(inode, inode->i_mode, fattr->rdev); |
| 747 | |
| 748 | nfsi->read_cache_jiffies = fattr->timestamp; |
| 749 | inode->i_atime = fattr->atime; |
| 750 | inode->i_mtime = fattr->mtime; |
| 751 | inode->i_ctime = fattr->ctime; |
| 752 | if (fattr->valid & NFS_ATTR_FATTR_V4) |
| 753 | nfsi->change_attr = fattr->change_attr; |
| 754 | inode->i_size = nfs_size_to_loff_t(fattr->size); |
| 755 | inode->i_nlink = fattr->nlink; |
| 756 | inode->i_uid = fattr->uid; |
| 757 | inode->i_gid = fattr->gid; |
| 758 | if (fattr->valid & (NFS_ATTR_FATTR_V3 | NFS_ATTR_FATTR_V4)) { |
| 759 | /* |
| 760 | * report the blocks in 512byte units |
| 761 | */ |
| 762 | inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used); |
| 763 | inode->i_blksize = inode->i_sb->s_blocksize; |
| 764 | } else { |
| 765 | inode->i_blocks = fattr->du.nfs2.blocks; |
| 766 | inode->i_blksize = fattr->du.nfs2.blocksize; |
| 767 | } |
| 768 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); |
| 769 | nfsi->attrtimeo_timestamp = jiffies; |
| 770 | memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf)); |
| 771 | nfsi->cache_access.cred = NULL; |
| 772 | |
| 773 | unlock_new_inode(inode); |
| 774 | } else |
| 775 | nfs_refresh_inode(inode, fattr); |
| 776 | dprintk("NFS: nfs_fhget(%s/%Ld ct=%d)\n", |
| 777 | inode->i_sb->s_id, |
| 778 | (long long)NFS_FILEID(inode), |
| 779 | atomic_read(&inode->i_count)); |
| 780 | |
| 781 | out: |
| 782 | return inode; |
| 783 | |
| 784 | out_no_inode: |
| 785 | printk("nfs_fhget: iget failed\n"); |
| 786 | goto out; |
| 787 | } |
| 788 | |
| 789 | #define NFS_VALID_ATTRS (ATTR_MODE|ATTR_UID|ATTR_GID|ATTR_SIZE|ATTR_ATIME|ATTR_ATIME_SET|ATTR_MTIME|ATTR_MTIME_SET) |
| 790 | |
| 791 | int |
| 792 | nfs_setattr(struct dentry *dentry, struct iattr *attr) |
| 793 | { |
| 794 | struct inode *inode = dentry->d_inode; |
| 795 | struct nfs_fattr fattr; |
| 796 | int error; |
| 797 | |
| 798 | if (attr->ia_valid & ATTR_SIZE) { |
| 799 | if (!S_ISREG(inode->i_mode) || attr->ia_size == i_size_read(inode)) |
| 800 | attr->ia_valid &= ~ATTR_SIZE; |
| 801 | } |
| 802 | |
| 803 | /* Optimization: if the end result is no change, don't RPC */ |
| 804 | attr->ia_valid &= NFS_VALID_ATTRS; |
| 805 | if (attr->ia_valid == 0) |
| 806 | return 0; |
| 807 | |
| 808 | lock_kernel(); |
| 809 | nfs_begin_data_update(inode); |
| 810 | /* Write all dirty data if we're changing file permissions or size */ |
| 811 | if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID|ATTR_SIZE)) != 0) { |
| 812 | if (filemap_fdatawrite(inode->i_mapping) == 0) |
| 813 | filemap_fdatawait(inode->i_mapping); |
| 814 | nfs_wb_all(inode); |
| 815 | } |
| 816 | error = NFS_PROTO(inode)->setattr(dentry, &fattr, attr); |
| 817 | if (error == 0) { |
| 818 | nfs_refresh_inode(inode, &fattr); |
| 819 | if ((attr->ia_valid & ATTR_MODE) != 0) { |
| 820 | int mode; |
| 821 | mode = inode->i_mode & ~S_IALLUGO; |
| 822 | mode |= attr->ia_mode & S_IALLUGO; |
| 823 | inode->i_mode = mode; |
| 824 | } |
| 825 | if ((attr->ia_valid & ATTR_UID) != 0) |
| 826 | inode->i_uid = attr->ia_uid; |
| 827 | if ((attr->ia_valid & ATTR_GID) != 0) |
| 828 | inode->i_gid = attr->ia_gid; |
| 829 | if ((attr->ia_valid & ATTR_SIZE) != 0) { |
| 830 | inode->i_size = attr->ia_size; |
| 831 | vmtruncate(inode, attr->ia_size); |
| 832 | } |
| 833 | } |
| 834 | if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) |
Trond Myklebust | ada70d9 | 2005-06-22 17:16:22 +0000 | [diff] [blame] | 835 | NFS_FLAGS(inode) |= NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 836 | nfs_end_data_update(inode); |
| 837 | unlock_kernel(); |
| 838 | return error; |
| 839 | } |
| 840 | |
| 841 | /* |
| 842 | * Wait for the inode to get unlocked. |
| 843 | * (Used for NFS_INO_LOCKED and NFS_INO_REVALIDATING). |
| 844 | */ |
| 845 | static int |
| 846 | nfs_wait_on_inode(struct inode *inode, int flag) |
| 847 | { |
| 848 | struct rpc_clnt *clnt = NFS_CLIENT(inode); |
| 849 | struct nfs_inode *nfsi = NFS_I(inode); |
| 850 | |
| 851 | int error; |
| 852 | if (!(NFS_FLAGS(inode) & flag)) |
| 853 | return 0; |
| 854 | atomic_inc(&inode->i_count); |
| 855 | error = nfs_wait_event(clnt, nfsi->nfs_i_wait, |
| 856 | !(NFS_FLAGS(inode) & flag)); |
| 857 | iput(inode); |
| 858 | return error; |
| 859 | } |
| 860 | |
| 861 | int nfs_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat) |
| 862 | { |
| 863 | struct inode *inode = dentry->d_inode; |
| 864 | struct nfs_inode *nfsi = NFS_I(inode); |
| 865 | int need_atime = nfsi->flags & NFS_INO_INVALID_ATIME; |
| 866 | int err; |
| 867 | |
| 868 | if (__IS_FLG(inode, MS_NOATIME)) |
| 869 | need_atime = 0; |
| 870 | else if (__IS_FLG(inode, MS_NODIRATIME) && S_ISDIR(inode->i_mode)) |
| 871 | need_atime = 0; |
| 872 | /* We may force a getattr if the user cares about atime */ |
| 873 | if (need_atime) |
| 874 | err = __nfs_revalidate_inode(NFS_SERVER(inode), inode); |
| 875 | else |
| 876 | err = nfs_revalidate_inode(NFS_SERVER(inode), inode); |
| 877 | if (!err) |
| 878 | generic_fillattr(inode, stat); |
| 879 | return err; |
| 880 | } |
| 881 | |
| 882 | struct nfs_open_context *alloc_nfs_open_context(struct dentry *dentry, struct rpc_cred *cred) |
| 883 | { |
| 884 | struct nfs_open_context *ctx; |
| 885 | |
| 886 | ctx = (struct nfs_open_context *)kmalloc(sizeof(*ctx), GFP_KERNEL); |
| 887 | if (ctx != NULL) { |
| 888 | atomic_set(&ctx->count, 1); |
| 889 | ctx->dentry = dget(dentry); |
| 890 | ctx->cred = get_rpccred(cred); |
| 891 | ctx->state = NULL; |
| 892 | ctx->lockowner = current->files; |
| 893 | ctx->error = 0; |
Olivier Galibert | 00a9264 | 2005-06-22 17:16:29 +0000 | [diff] [blame] | 894 | ctx->dir_cookie = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 895 | } |
| 896 | return ctx; |
| 897 | } |
| 898 | |
| 899 | struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx) |
| 900 | { |
| 901 | if (ctx != NULL) |
| 902 | atomic_inc(&ctx->count); |
| 903 | return ctx; |
| 904 | } |
| 905 | |
| 906 | void put_nfs_open_context(struct nfs_open_context *ctx) |
| 907 | { |
| 908 | if (atomic_dec_and_test(&ctx->count)) { |
| 909 | if (!list_empty(&ctx->list)) { |
| 910 | struct inode *inode = ctx->dentry->d_inode; |
| 911 | spin_lock(&inode->i_lock); |
| 912 | list_del(&ctx->list); |
| 913 | spin_unlock(&inode->i_lock); |
| 914 | } |
| 915 | if (ctx->state != NULL) |
| 916 | nfs4_close_state(ctx->state, ctx->mode); |
| 917 | if (ctx->cred != NULL) |
| 918 | put_rpccred(ctx->cred); |
| 919 | dput(ctx->dentry); |
| 920 | kfree(ctx); |
| 921 | } |
| 922 | } |
| 923 | |
| 924 | /* |
| 925 | * Ensure that mmap has a recent RPC credential for use when writing out |
| 926 | * shared pages |
| 927 | */ |
| 928 | void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx) |
| 929 | { |
| 930 | struct inode *inode = filp->f_dentry->d_inode; |
| 931 | struct nfs_inode *nfsi = NFS_I(inode); |
| 932 | |
| 933 | filp->private_data = get_nfs_open_context(ctx); |
| 934 | spin_lock(&inode->i_lock); |
| 935 | list_add(&ctx->list, &nfsi->open_files); |
| 936 | spin_unlock(&inode->i_lock); |
| 937 | } |
| 938 | |
| 939 | struct nfs_open_context *nfs_find_open_context(struct inode *inode, int mode) |
| 940 | { |
| 941 | struct nfs_inode *nfsi = NFS_I(inode); |
| 942 | struct nfs_open_context *pos, *ctx = NULL; |
| 943 | |
| 944 | spin_lock(&inode->i_lock); |
| 945 | list_for_each_entry(pos, &nfsi->open_files, list) { |
| 946 | if ((pos->mode & mode) == mode) { |
| 947 | ctx = get_nfs_open_context(pos); |
| 948 | break; |
| 949 | } |
| 950 | } |
| 951 | spin_unlock(&inode->i_lock); |
| 952 | return ctx; |
| 953 | } |
| 954 | |
| 955 | void nfs_file_clear_open_context(struct file *filp) |
| 956 | { |
| 957 | struct inode *inode = filp->f_dentry->d_inode; |
| 958 | struct nfs_open_context *ctx = (struct nfs_open_context *)filp->private_data; |
| 959 | |
| 960 | if (ctx) { |
| 961 | filp->private_data = NULL; |
| 962 | spin_lock(&inode->i_lock); |
| 963 | list_move_tail(&ctx->list, &NFS_I(inode)->open_files); |
| 964 | spin_unlock(&inode->i_lock); |
| 965 | put_nfs_open_context(ctx); |
| 966 | } |
| 967 | } |
| 968 | |
| 969 | /* |
| 970 | * These allocate and release file read/write context information. |
| 971 | */ |
| 972 | int nfs_open(struct inode *inode, struct file *filp) |
| 973 | { |
| 974 | struct nfs_open_context *ctx; |
| 975 | struct rpc_cred *cred; |
| 976 | |
| 977 | cred = rpcauth_lookupcred(NFS_CLIENT(inode)->cl_auth, 0); |
| 978 | if (IS_ERR(cred)) |
| 979 | return PTR_ERR(cred); |
| 980 | ctx = alloc_nfs_open_context(filp->f_dentry, cred); |
| 981 | put_rpccred(cred); |
| 982 | if (ctx == NULL) |
| 983 | return -ENOMEM; |
| 984 | ctx->mode = filp->f_mode; |
| 985 | nfs_file_set_open_context(filp, ctx); |
| 986 | put_nfs_open_context(ctx); |
| 987 | if ((filp->f_mode & FMODE_WRITE) != 0) |
| 988 | nfs_begin_data_update(inode); |
| 989 | return 0; |
| 990 | } |
| 991 | |
| 992 | int nfs_release(struct inode *inode, struct file *filp) |
| 993 | { |
| 994 | if ((filp->f_mode & FMODE_WRITE) != 0) |
| 995 | nfs_end_data_update(inode); |
| 996 | nfs_file_clear_open_context(filp); |
| 997 | return 0; |
| 998 | } |
| 999 | |
| 1000 | /* |
| 1001 | * This function is called whenever some part of NFS notices that |
| 1002 | * the cached attributes have to be refreshed. |
| 1003 | */ |
| 1004 | int |
| 1005 | __nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) |
| 1006 | { |
| 1007 | int status = -ESTALE; |
| 1008 | struct nfs_fattr fattr; |
| 1009 | struct nfs_inode *nfsi = NFS_I(inode); |
| 1010 | unsigned long verifier; |
| 1011 | unsigned int flags; |
| 1012 | |
| 1013 | dfprintk(PAGECACHE, "NFS: revalidating (%s/%Ld)\n", |
| 1014 | inode->i_sb->s_id, (long long)NFS_FILEID(inode)); |
| 1015 | |
| 1016 | lock_kernel(); |
| 1017 | if (!inode || is_bad_inode(inode)) |
| 1018 | goto out_nowait; |
| 1019 | if (NFS_STALE(inode)) |
| 1020 | goto out_nowait; |
| 1021 | |
| 1022 | while (NFS_REVALIDATING(inode)) { |
| 1023 | status = nfs_wait_on_inode(inode, NFS_INO_REVALIDATING); |
| 1024 | if (status < 0) |
| 1025 | goto out_nowait; |
| 1026 | if (NFS_ATTRTIMEO(inode) == 0) |
| 1027 | continue; |
| 1028 | if (NFS_FLAGS(inode) & (NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ATIME)) |
| 1029 | continue; |
| 1030 | status = NFS_STALE(inode) ? -ESTALE : 0; |
| 1031 | goto out_nowait; |
| 1032 | } |
| 1033 | NFS_FLAGS(inode) |= NFS_INO_REVALIDATING; |
| 1034 | |
| 1035 | /* Protect against RPC races by saving the change attribute */ |
| 1036 | verifier = nfs_save_change_attribute(inode); |
| 1037 | status = NFS_PROTO(inode)->getattr(server, NFS_FH(inode), &fattr); |
| 1038 | if (status != 0) { |
| 1039 | dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) getattr failed, error=%d\n", |
| 1040 | inode->i_sb->s_id, |
| 1041 | (long long)NFS_FILEID(inode), status); |
| 1042 | if (status == -ESTALE) { |
| 1043 | nfs_zap_caches(inode); |
| 1044 | if (!S_ISDIR(inode->i_mode)) |
| 1045 | NFS_FLAGS(inode) |= NFS_INO_STALE; |
| 1046 | } |
| 1047 | goto out; |
| 1048 | } |
| 1049 | |
| 1050 | status = nfs_update_inode(inode, &fattr, verifier); |
| 1051 | if (status) { |
| 1052 | dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) refresh failed, error=%d\n", |
| 1053 | inode->i_sb->s_id, |
| 1054 | (long long)NFS_FILEID(inode), status); |
| 1055 | goto out; |
| 1056 | } |
| 1057 | flags = nfsi->flags; |
Trond Myklebust | fe51bee | 2005-06-22 17:16:30 +0000 | [diff] [blame] | 1058 | nfsi->flags &= ~NFS_INO_REVAL_PAGECACHE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1059 | /* |
| 1060 | * We may need to keep the attributes marked as invalid if |
| 1061 | * we raced with nfs_end_attr_update(). |
| 1062 | */ |
| 1063 | if (verifier == nfsi->cache_change_attribute) |
| 1064 | nfsi->flags &= ~(NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ATIME); |
| 1065 | /* Do the page cache invalidation */ |
Trond Myklebust | 7d52e86 | 2005-06-22 17:16:30 +0000 | [diff] [blame] | 1066 | nfs_revalidate_mapping(inode, inode->i_mapping); |
Trond Myklebust | ada70d9 | 2005-06-22 17:16:22 +0000 | [diff] [blame] | 1067 | if (flags & NFS_INO_INVALID_ACL) |
| 1068 | nfs_zap_acl_cache(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1069 | dfprintk(PAGECACHE, "NFS: (%s/%Ld) revalidation complete\n", |
| 1070 | inode->i_sb->s_id, |
| 1071 | (long long)NFS_FILEID(inode)); |
| 1072 | |
| 1073 | out: |
| 1074 | NFS_FLAGS(inode) &= ~NFS_INO_REVALIDATING; |
| 1075 | wake_up(&nfsi->nfs_i_wait); |
| 1076 | out_nowait: |
| 1077 | unlock_kernel(); |
| 1078 | return status; |
| 1079 | } |
| 1080 | |
| 1081 | int nfs_attribute_timeout(struct inode *inode) |
| 1082 | { |
| 1083 | struct nfs_inode *nfsi = NFS_I(inode); |
| 1084 | |
| 1085 | if (nfs_have_delegation(inode, FMODE_READ)) |
| 1086 | return 0; |
| 1087 | return time_after(jiffies, nfsi->read_cache_jiffies+nfsi->attrtimeo); |
| 1088 | } |
| 1089 | |
| 1090 | /** |
| 1091 | * nfs_revalidate_inode - Revalidate the inode attributes |
| 1092 | * @server - pointer to nfs_server struct |
| 1093 | * @inode - pointer to inode struct |
| 1094 | * |
| 1095 | * Updates inode attribute information by retrieving the data from the server. |
| 1096 | */ |
| 1097 | int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) |
| 1098 | { |
| 1099 | if (!(NFS_FLAGS(inode) & (NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA)) |
| 1100 | && !nfs_attribute_timeout(inode)) |
| 1101 | return NFS_STALE(inode) ? -ESTALE : 0; |
| 1102 | return __nfs_revalidate_inode(server, inode); |
| 1103 | } |
| 1104 | |
| 1105 | /** |
Trond Myklebust | 7d52e86 | 2005-06-22 17:16:30 +0000 | [diff] [blame] | 1106 | * nfs_revalidate_mapping - Revalidate the pagecache |
| 1107 | * @inode - pointer to host inode |
| 1108 | * @mapping - pointer to mapping |
| 1109 | */ |
| 1110 | void nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping) |
| 1111 | { |
| 1112 | struct nfs_inode *nfsi = NFS_I(inode); |
| 1113 | |
| 1114 | if (nfsi->flags & NFS_INO_INVALID_DATA) { |
| 1115 | if (S_ISREG(inode->i_mode)) { |
| 1116 | if (filemap_fdatawrite(mapping) == 0) |
| 1117 | filemap_fdatawait(mapping); |
| 1118 | nfs_wb_all(inode); |
| 1119 | } |
| 1120 | invalidate_inode_pages2(mapping); |
| 1121 | nfsi->flags &= ~NFS_INO_INVALID_DATA; |
| 1122 | if (S_ISDIR(inode->i_mode)) { |
| 1123 | memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf)); |
| 1124 | /* This ensures we revalidate child dentries */ |
| 1125 | nfsi->cache_change_attribute++; |
| 1126 | } |
| 1127 | dfprintk(PAGECACHE, "NFS: (%s/%Ld) data cache invalidated\n", |
| 1128 | inode->i_sb->s_id, |
| 1129 | (long long)NFS_FILEID(inode)); |
| 1130 | } |
| 1131 | } |
| 1132 | |
| 1133 | /** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1134 | * nfs_begin_data_update |
| 1135 | * @inode - pointer to inode |
| 1136 | * Declare that a set of operations will update file data on the server |
| 1137 | */ |
| 1138 | void nfs_begin_data_update(struct inode *inode) |
| 1139 | { |
| 1140 | atomic_inc(&NFS_I(inode)->data_updates); |
| 1141 | } |
| 1142 | |
| 1143 | /** |
| 1144 | * nfs_end_data_update |
| 1145 | * @inode - pointer to inode |
| 1146 | * Declare end of the operations that will update file data |
| 1147 | * This will mark the inode as immediately needing revalidation |
| 1148 | * of its attribute cache. |
| 1149 | */ |
| 1150 | void nfs_end_data_update(struct inode *inode) |
| 1151 | { |
| 1152 | struct nfs_inode *nfsi = NFS_I(inode); |
| 1153 | |
| 1154 | if (!nfs_have_delegation(inode, FMODE_READ)) { |
| 1155 | /* Mark the attribute cache for revalidation */ |
| 1156 | nfsi->flags |= NFS_INO_INVALID_ATTR; |
| 1157 | /* Directories and symlinks: invalidate page cache too */ |
| 1158 | if (S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode)) |
| 1159 | nfsi->flags |= NFS_INO_INVALID_DATA; |
| 1160 | } |
| 1161 | nfsi->cache_change_attribute ++; |
| 1162 | atomic_dec(&nfsi->data_updates); |
| 1163 | } |
| 1164 | |
| 1165 | /** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1166 | * nfs_refresh_inode - verify consistency of the inode attribute cache |
| 1167 | * @inode - pointer to inode |
| 1168 | * @fattr - updated attributes |
| 1169 | * |
| 1170 | * Verifies the attribute cache. If we have just changed the attributes, |
| 1171 | * so that fattr carries weak cache consistency data, then it may |
| 1172 | * also update the ctime/mtime/change_attribute. |
| 1173 | */ |
| 1174 | int nfs_refresh_inode(struct inode *inode, struct nfs_fattr *fattr) |
| 1175 | { |
| 1176 | struct nfs_inode *nfsi = NFS_I(inode); |
| 1177 | loff_t cur_size, new_isize; |
| 1178 | int data_unstable; |
| 1179 | |
| 1180 | /* Do we hold a delegation? */ |
| 1181 | if (nfs_have_delegation(inode, FMODE_READ)) |
| 1182 | return 0; |
| 1183 | |
| 1184 | /* Are we in the process of updating data on the server? */ |
| 1185 | data_unstable = nfs_caches_unstable(inode); |
| 1186 | |
| 1187 | if (fattr->valid & NFS_ATTR_FATTR_V4) { |
| 1188 | if ((fattr->valid & NFS_ATTR_PRE_CHANGE) != 0 |
| 1189 | && nfsi->change_attr == fattr->pre_change_attr) |
| 1190 | nfsi->change_attr = fattr->change_attr; |
Trond Myklebust | fe51bee | 2005-06-22 17:16:30 +0000 | [diff] [blame] | 1191 | if (nfsi->change_attr != fattr->change_attr) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1192 | nfsi->flags |= NFS_INO_INVALID_ATTR; |
Trond Myklebust | fe51bee | 2005-06-22 17:16:30 +0000 | [diff] [blame] | 1193 | if (!data_unstable) |
| 1194 | nfsi->flags |= NFS_INO_REVAL_PAGECACHE; |
| 1195 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1196 | } |
| 1197 | |
| 1198 | if ((fattr->valid & NFS_ATTR_FATTR) == 0) |
| 1199 | return 0; |
| 1200 | |
| 1201 | /* Has the inode gone and changed behind our back? */ |
| 1202 | if (nfsi->fileid != fattr->fileid |
| 1203 | || (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) |
| 1204 | return -EIO; |
| 1205 | |
| 1206 | cur_size = i_size_read(inode); |
| 1207 | new_isize = nfs_size_to_loff_t(fattr->size); |
| 1208 | |
| 1209 | /* If we have atomic WCC data, we may update some attributes */ |
| 1210 | if ((fattr->valid & NFS_ATTR_WCC) != 0) { |
| 1211 | if (timespec_equal(&inode->i_ctime, &fattr->pre_ctime)) |
| 1212 | memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime)); |
| 1213 | if (timespec_equal(&inode->i_mtime, &fattr->pre_mtime)) |
| 1214 | memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime)); |
| 1215 | } |
| 1216 | |
| 1217 | /* Verify a few of the more important attributes */ |
Trond Myklebust | fe51bee | 2005-06-22 17:16:30 +0000 | [diff] [blame] | 1218 | if (!timespec_equal(&inode->i_mtime, &fattr->mtime)) { |
Trond Myklebust | 951a143 | 2005-06-22 17:16:30 +0000 | [diff] [blame] | 1219 | nfsi->flags |= NFS_INO_INVALID_ATTR; |
Trond Myklebust | fe51bee | 2005-06-22 17:16:30 +0000 | [diff] [blame] | 1220 | if (!data_unstable) |
| 1221 | nfsi->flags |= NFS_INO_REVAL_PAGECACHE; |
| 1222 | } |
| 1223 | if (cur_size != new_isize) { |
| 1224 | nfsi->flags |= NFS_INO_INVALID_ATTR; |
| 1225 | if (nfsi->npages == 0) |
| 1226 | nfsi->flags |= NFS_INO_REVAL_PAGECACHE; |
| 1227 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1228 | |
| 1229 | /* Have any file permissions changed? */ |
| 1230 | if ((inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO) |
| 1231 | || inode->i_uid != fattr->uid |
| 1232 | || inode->i_gid != fattr->gid) |
Trond Myklebust | ada70d9 | 2005-06-22 17:16:22 +0000 | [diff] [blame] | 1233 | nfsi->flags |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1234 | |
| 1235 | /* Has the link count changed? */ |
| 1236 | if (inode->i_nlink != fattr->nlink) |
| 1237 | nfsi->flags |= NFS_INO_INVALID_ATTR; |
| 1238 | |
| 1239 | if (!timespec_equal(&inode->i_atime, &fattr->atime)) |
| 1240 | nfsi->flags |= NFS_INO_INVALID_ATIME; |
| 1241 | |
| 1242 | nfsi->read_cache_jiffies = fattr->timestamp; |
| 1243 | return 0; |
| 1244 | } |
| 1245 | |
| 1246 | /* |
| 1247 | * Many nfs protocol calls return the new file attributes after |
| 1248 | * an operation. Here we update the inode to reflect the state |
| 1249 | * of the server's inode. |
| 1250 | * |
| 1251 | * This is a bit tricky because we have to make sure all dirty pages |
| 1252 | * have been sent off to the server before calling invalidate_inode_pages. |
| 1253 | * To make sure no other process adds more write requests while we try |
| 1254 | * our best to flush them, we make them sleep during the attribute refresh. |
| 1255 | * |
| 1256 | * A very similar scenario holds for the dir cache. |
| 1257 | */ |
| 1258 | static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr, unsigned long verifier) |
| 1259 | { |
| 1260 | struct nfs_inode *nfsi = NFS_I(inode); |
Trond Myklebust | 951a143 | 2005-06-22 17:16:30 +0000 | [diff] [blame] | 1261 | loff_t cur_isize, new_isize; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1262 | unsigned int invalid = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1263 | int data_unstable; |
| 1264 | |
| 1265 | dfprintk(VFS, "NFS: %s(%s/%ld ct=%d info=0x%x)\n", |
| 1266 | __FUNCTION__, inode->i_sb->s_id, inode->i_ino, |
| 1267 | atomic_read(&inode->i_count), fattr->valid); |
| 1268 | |
| 1269 | if ((fattr->valid & NFS_ATTR_FATTR) == 0) |
| 1270 | return 0; |
| 1271 | |
| 1272 | if (nfsi->fileid != fattr->fileid) { |
| 1273 | printk(KERN_ERR "%s: inode number mismatch\n" |
| 1274 | "expected (%s/0x%Lx), got (%s/0x%Lx)\n", |
| 1275 | __FUNCTION__, |
| 1276 | inode->i_sb->s_id, (long long)nfsi->fileid, |
| 1277 | inode->i_sb->s_id, (long long)fattr->fileid); |
| 1278 | goto out_err; |
| 1279 | } |
| 1280 | |
| 1281 | /* |
| 1282 | * Make sure the inode's type hasn't changed. |
| 1283 | */ |
| 1284 | if ((inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) |
| 1285 | goto out_changed; |
| 1286 | |
| 1287 | /* |
| 1288 | * Update the read time so we don't revalidate too often. |
| 1289 | */ |
| 1290 | nfsi->read_cache_jiffies = fattr->timestamp; |
| 1291 | |
| 1292 | /* Are we racing with known updates of the metadata on the server? */ |
| 1293 | data_unstable = ! nfs_verify_change_attribute(inode, verifier); |
| 1294 | |
Trond Myklebust | 951a143 | 2005-06-22 17:16:30 +0000 | [diff] [blame] | 1295 | /* Check if our cached file size is stale */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1296 | new_isize = nfs_size_to_loff_t(fattr->size); |
| 1297 | cur_isize = i_size_read(inode); |
Trond Myklebust | 951a143 | 2005-06-22 17:16:30 +0000 | [diff] [blame] | 1298 | if (new_isize != cur_isize) { |
| 1299 | /* Do we perhaps have any outstanding writes? */ |
| 1300 | if (nfsi->npages == 0) { |
| 1301 | /* No, but did we race with nfs_end_data_update()? */ |
| 1302 | if (verifier == nfsi->cache_change_attribute) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1303 | inode->i_size = new_isize; |
Trond Myklebust | 951a143 | 2005-06-22 17:16:30 +0000 | [diff] [blame] | 1304 | invalid |= NFS_INO_INVALID_DATA; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1305 | } |
Trond Myklebust | 951a143 | 2005-06-22 17:16:30 +0000 | [diff] [blame] | 1306 | invalid |= NFS_INO_INVALID_ATTR; |
| 1307 | } else if (new_isize > cur_isize) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1308 | inode->i_size = new_isize; |
| 1309 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA; |
| 1310 | } |
Trond Myklebust | 951a143 | 2005-06-22 17:16:30 +0000 | [diff] [blame] | 1311 | dprintk("NFS: isize change on server for file %s/%ld\n", |
| 1312 | inode->i_sb->s_id, inode->i_ino); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1313 | } |
| 1314 | |
Trond Myklebust | 951a143 | 2005-06-22 17:16:30 +0000 | [diff] [blame] | 1315 | /* Check if the mtime agrees */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1316 | if (!timespec_equal(&inode->i_mtime, &fattr->mtime)) { |
| 1317 | memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime)); |
Trond Myklebust | 951a143 | 2005-06-22 17:16:30 +0000 | [diff] [blame] | 1318 | dprintk("NFS: mtime change on server for file %s/%ld\n", |
| 1319 | inode->i_sb->s_id, inode->i_ino); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1320 | if (!data_unstable) |
| 1321 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA; |
| 1322 | } |
| 1323 | |
| 1324 | if ((fattr->valid & NFS_ATTR_FATTR_V4) |
| 1325 | && nfsi->change_attr != fattr->change_attr) { |
Trond Myklebust | 951a143 | 2005-06-22 17:16:30 +0000 | [diff] [blame] | 1326 | dprintk("NFS: change_attr change on server for file %s/%ld\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1327 | inode->i_sb->s_id, inode->i_ino); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1328 | nfsi->change_attr = fattr->change_attr; |
| 1329 | if (!data_unstable) |
Trond Myklebust | ada70d9 | 2005-06-22 17:16:22 +0000 | [diff] [blame] | 1330 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1331 | } |
| 1332 | |
Trond Myklebust | ada70d9 | 2005-06-22 17:16:22 +0000 | [diff] [blame] | 1333 | /* If ctime has changed we should definitely clear access+acl caches */ |
| 1334 | if (!timespec_equal(&inode->i_ctime, &fattr->ctime)) { |
| 1335 | if (!data_unstable) |
| 1336 | invalid |= NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
| 1337 | memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime)); |
| 1338 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1339 | memcpy(&inode->i_atime, &fattr->atime, sizeof(inode->i_atime)); |
| 1340 | |
| 1341 | if ((inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO) || |
| 1342 | inode->i_uid != fattr->uid || |
| 1343 | inode->i_gid != fattr->gid) |
Trond Myklebust | ada70d9 | 2005-06-22 17:16:22 +0000 | [diff] [blame] | 1344 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1345 | |
| 1346 | inode->i_mode = fattr->mode; |
| 1347 | inode->i_nlink = fattr->nlink; |
| 1348 | inode->i_uid = fattr->uid; |
| 1349 | inode->i_gid = fattr->gid; |
| 1350 | |
| 1351 | if (fattr->valid & (NFS_ATTR_FATTR_V3 | NFS_ATTR_FATTR_V4)) { |
| 1352 | /* |
| 1353 | * report the blocks in 512byte units |
| 1354 | */ |
| 1355 | inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used); |
| 1356 | inode->i_blksize = inode->i_sb->s_blocksize; |
| 1357 | } else { |
| 1358 | inode->i_blocks = fattr->du.nfs2.blocks; |
| 1359 | inode->i_blksize = fattr->du.nfs2.blocksize; |
| 1360 | } |
| 1361 | |
| 1362 | /* Update attrtimeo value if we're out of the unstable period */ |
| 1363 | if (invalid & NFS_INO_INVALID_ATTR) { |
| 1364 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); |
| 1365 | nfsi->attrtimeo_timestamp = jiffies; |
| 1366 | } else if (time_after(jiffies, nfsi->attrtimeo_timestamp+nfsi->attrtimeo)) { |
| 1367 | if ((nfsi->attrtimeo <<= 1) > NFS_MAXATTRTIMEO(inode)) |
| 1368 | nfsi->attrtimeo = NFS_MAXATTRTIMEO(inode); |
| 1369 | nfsi->attrtimeo_timestamp = jiffies; |
| 1370 | } |
| 1371 | /* Don't invalidate the data if we were to blame */ |
| 1372 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) |
| 1373 | || S_ISLNK(inode->i_mode))) |
| 1374 | invalid &= ~NFS_INO_INVALID_DATA; |
| 1375 | if (!nfs_have_delegation(inode, FMODE_READ)) |
| 1376 | nfsi->flags |= invalid; |
| 1377 | |
| 1378 | return 0; |
| 1379 | out_changed: |
| 1380 | /* |
| 1381 | * Big trouble! The inode has become a different object. |
| 1382 | */ |
| 1383 | #ifdef NFS_PARANOIA |
| 1384 | printk(KERN_DEBUG "%s: inode %ld mode changed, %07o to %07o\n", |
| 1385 | __FUNCTION__, inode->i_ino, inode->i_mode, fattr->mode); |
| 1386 | #endif |
| 1387 | /* |
| 1388 | * No need to worry about unhashing the dentry, as the |
| 1389 | * lookup validation will know that the inode is bad. |
| 1390 | * (But we fall through to invalidate the caches.) |
| 1391 | */ |
| 1392 | nfs_invalidate_inode(inode); |
| 1393 | out_err: |
| 1394 | NFS_FLAGS(inode) |= NFS_INO_STALE; |
| 1395 | return -ESTALE; |
| 1396 | } |
| 1397 | |
| 1398 | /* |
| 1399 | * File system information |
| 1400 | */ |
| 1401 | |
| 1402 | static int nfs_set_super(struct super_block *s, void *data) |
| 1403 | { |
| 1404 | s->s_fs_info = data; |
| 1405 | return set_anon_super(s, data); |
| 1406 | } |
| 1407 | |
| 1408 | static int nfs_compare_super(struct super_block *sb, void *data) |
| 1409 | { |
| 1410 | struct nfs_server *server = data; |
| 1411 | struct nfs_server *old = NFS_SB(sb); |
| 1412 | |
| 1413 | if (old->addr.sin_addr.s_addr != server->addr.sin_addr.s_addr) |
| 1414 | return 0; |
| 1415 | if (old->addr.sin_port != server->addr.sin_port) |
| 1416 | return 0; |
| 1417 | return !nfs_compare_fh(&old->fh, &server->fh); |
| 1418 | } |
| 1419 | |
| 1420 | static struct super_block *nfs_get_sb(struct file_system_type *fs_type, |
| 1421 | int flags, const char *dev_name, void *raw_data) |
| 1422 | { |
| 1423 | int error; |
Trond Myklebust | 9085bbc | 2005-06-22 17:16:20 +0000 | [diff] [blame] | 1424 | struct nfs_server *server = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1425 | struct super_block *s; |
| 1426 | struct nfs_fh *root; |
| 1427 | struct nfs_mount_data *data = raw_data; |
| 1428 | |
Trond Myklebust | 9085bbc | 2005-06-22 17:16:20 +0000 | [diff] [blame] | 1429 | s = ERR_PTR(-EINVAL); |
| 1430 | if (data == NULL) { |
| 1431 | dprintk("%s: missing data argument\n", __FUNCTION__); |
| 1432 | goto out_err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1433 | } |
Trond Myklebust | 9085bbc | 2005-06-22 17:16:20 +0000 | [diff] [blame] | 1434 | if (data->version <= 0 || data->version > NFS_MOUNT_VERSION) { |
| 1435 | dprintk("%s: bad mount version\n", __FUNCTION__); |
| 1436 | goto out_err; |
| 1437 | } |
| 1438 | switch (data->version) { |
| 1439 | case 1: |
| 1440 | data->namlen = 0; |
| 1441 | case 2: |
| 1442 | data->bsize = 0; |
| 1443 | case 3: |
| 1444 | if (data->flags & NFS_MOUNT_VER3) { |
| 1445 | dprintk("%s: mount structure version %d does not support NFSv3\n", |
| 1446 | __FUNCTION__, |
| 1447 | data->version); |
| 1448 | goto out_err; |
| 1449 | } |
| 1450 | data->root.size = NFS2_FHSIZE; |
| 1451 | memcpy(data->root.data, data->old_root.data, NFS2_FHSIZE); |
| 1452 | case 4: |
| 1453 | if (data->flags & NFS_MOUNT_SECFLAVOUR) { |
| 1454 | dprintk("%s: mount structure version %d does not support strong security\n", |
| 1455 | __FUNCTION__, |
| 1456 | data->version); |
| 1457 | goto out_err; |
| 1458 | } |
| 1459 | case 5: |
| 1460 | memset(data->context, 0, sizeof(data->context)); |
| 1461 | } |
| 1462 | #ifndef CONFIG_NFS_V3 |
| 1463 | /* If NFSv3 is not compiled in, return -EPROTONOSUPPORT */ |
| 1464 | s = ERR_PTR(-EPROTONOSUPPORT); |
| 1465 | if (data->flags & NFS_MOUNT_VER3) { |
| 1466 | dprintk("%s: NFSv3 not compiled into kernel\n", __FUNCTION__); |
| 1467 | goto out_err; |
| 1468 | } |
| 1469 | #endif /* CONFIG_NFS_V3 */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1470 | |
Trond Myklebust | 9085bbc | 2005-06-22 17:16:20 +0000 | [diff] [blame] | 1471 | s = ERR_PTR(-ENOMEM); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1472 | server = kmalloc(sizeof(struct nfs_server), GFP_KERNEL); |
| 1473 | if (!server) |
Trond Myklebust | 9085bbc | 2005-06-22 17:16:20 +0000 | [diff] [blame] | 1474 | goto out_err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1475 | memset(server, 0, sizeof(struct nfs_server)); |
| 1476 | /* Zero out the NFS state stuff */ |
| 1477 | init_nfsv4_state(server); |
Andreas Gruenbacher | b7fa055 | 2005-06-22 17:16:27 +0000 | [diff] [blame] | 1478 | server->client = server->client_sys = server->client_acl = ERR_PTR(-EINVAL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1479 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1480 | root = &server->fh; |
| 1481 | if (data->flags & NFS_MOUNT_VER3) |
| 1482 | root->size = data->root.size; |
| 1483 | else |
| 1484 | root->size = NFS2_FHSIZE; |
Trond Myklebust | 9085bbc | 2005-06-22 17:16:20 +0000 | [diff] [blame] | 1485 | s = ERR_PTR(-EINVAL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1486 | if (root->size > sizeof(root->data)) { |
Trond Myklebust | 9085bbc | 2005-06-22 17:16:20 +0000 | [diff] [blame] | 1487 | dprintk("%s: invalid root filehandle\n", __FUNCTION__); |
| 1488 | goto out_err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1489 | } |
| 1490 | memcpy(root->data, data->root.data, root->size); |
| 1491 | |
| 1492 | /* We now require that the mount process passes the remote address */ |
| 1493 | memcpy(&server->addr, &data->addr, sizeof(server->addr)); |
| 1494 | if (server->addr.sin_addr.s_addr == INADDR_ANY) { |
Trond Myklebust | 9085bbc | 2005-06-22 17:16:20 +0000 | [diff] [blame] | 1495 | dprintk("%s: mount program didn't pass remote address!\n", |
| 1496 | __FUNCTION__); |
| 1497 | goto out_err; |
| 1498 | } |
| 1499 | |
| 1500 | /* Fire up rpciod if not yet running */ |
| 1501 | s = ERR_PTR(rpciod_up()); |
| 1502 | if (IS_ERR(s)) { |
| 1503 | dprintk("%s: couldn't start rpciod! Error = %ld\n", |
| 1504 | __FUNCTION__, PTR_ERR(s)); |
| 1505 | goto out_err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1506 | } |
| 1507 | |
| 1508 | s = sget(fs_type, nfs_compare_super, nfs_set_super, server); |
Trond Myklebust | 9085bbc | 2005-06-22 17:16:20 +0000 | [diff] [blame] | 1509 | if (IS_ERR(s) || s->s_root) |
| 1510 | goto out_rpciod_down; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1511 | |
| 1512 | s->s_flags = flags; |
| 1513 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1514 | error = nfs_fill_super(s, data, flags & MS_VERBOSE ? 1 : 0); |
| 1515 | if (error) { |
| 1516 | up_write(&s->s_umount); |
| 1517 | deactivate_super(s); |
| 1518 | return ERR_PTR(error); |
| 1519 | } |
| 1520 | s->s_flags |= MS_ACTIVE; |
| 1521 | return s; |
Trond Myklebust | 9085bbc | 2005-06-22 17:16:20 +0000 | [diff] [blame] | 1522 | out_rpciod_down: |
| 1523 | rpciod_down(); |
| 1524 | out_err: |
| 1525 | kfree(server); |
| 1526 | return s; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1527 | } |
| 1528 | |
| 1529 | static void nfs_kill_super(struct super_block *s) |
| 1530 | { |
| 1531 | struct nfs_server *server = NFS_SB(s); |
| 1532 | |
| 1533 | kill_anon_super(s); |
| 1534 | |
J. Bruce Fields | 6a19275 | 2005-06-22 17:16:23 +0000 | [diff] [blame] | 1535 | if (!IS_ERR(server->client)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1536 | rpc_shutdown_client(server->client); |
J. Bruce Fields | 6a19275 | 2005-06-22 17:16:23 +0000 | [diff] [blame] | 1537 | if (!IS_ERR(server->client_sys)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1538 | rpc_shutdown_client(server->client_sys); |
Andreas Gruenbacher | b7fa055 | 2005-06-22 17:16:27 +0000 | [diff] [blame] | 1539 | if (!IS_ERR(server->client_acl)) |
| 1540 | rpc_shutdown_client(server->client_acl); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1541 | |
| 1542 | if (!(server->flags & NFS_MOUNT_NONLM)) |
| 1543 | lockd_down(); /* release rpc.lockd */ |
| 1544 | |
| 1545 | rpciod_down(); /* release rpciod */ |
| 1546 | |
| 1547 | if (server->hostname != NULL) |
| 1548 | kfree(server->hostname); |
| 1549 | kfree(server); |
| 1550 | } |
| 1551 | |
| 1552 | static struct file_system_type nfs_fs_type = { |
| 1553 | .owner = THIS_MODULE, |
| 1554 | .name = "nfs", |
| 1555 | .get_sb = nfs_get_sb, |
| 1556 | .kill_sb = nfs_kill_super, |
| 1557 | .fs_flags = FS_ODD_RENAME|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, |
| 1558 | }; |
| 1559 | |
| 1560 | #ifdef CONFIG_NFS_V4 |
| 1561 | |
| 1562 | static void nfs4_clear_inode(struct inode *); |
| 1563 | |
| 1564 | |
| 1565 | static struct super_operations nfs4_sops = { |
| 1566 | .alloc_inode = nfs_alloc_inode, |
| 1567 | .destroy_inode = nfs_destroy_inode, |
| 1568 | .write_inode = nfs_write_inode, |
| 1569 | .delete_inode = nfs_delete_inode, |
| 1570 | .statfs = nfs_statfs, |
| 1571 | .clear_inode = nfs4_clear_inode, |
| 1572 | .umount_begin = nfs_umount_begin, |
| 1573 | .show_options = nfs_show_options, |
| 1574 | }; |
| 1575 | |
| 1576 | /* |
| 1577 | * Clean out any remaining NFSv4 state that might be left over due |
| 1578 | * to open() calls that passed nfs_atomic_lookup, but failed to call |
| 1579 | * nfs_open(). |
| 1580 | */ |
| 1581 | static void nfs4_clear_inode(struct inode *inode) |
| 1582 | { |
| 1583 | struct nfs_inode *nfsi = NFS_I(inode); |
| 1584 | |
| 1585 | /* If we are holding a delegation, return it! */ |
| 1586 | if (nfsi->delegation != NULL) |
| 1587 | nfs_inode_return_delegation(inode); |
| 1588 | /* First call standard NFS clear_inode() code */ |
| 1589 | nfs_clear_inode(inode); |
| 1590 | /* Now clear out any remaining state */ |
| 1591 | while (!list_empty(&nfsi->open_states)) { |
| 1592 | struct nfs4_state *state; |
| 1593 | |
| 1594 | state = list_entry(nfsi->open_states.next, |
| 1595 | struct nfs4_state, |
| 1596 | inode_states); |
| 1597 | dprintk("%s(%s/%Ld): found unclaimed NFSv4 state %p\n", |
| 1598 | __FUNCTION__, |
| 1599 | inode->i_sb->s_id, |
| 1600 | (long long)NFS_FILEID(inode), |
| 1601 | state); |
| 1602 | BUG_ON(atomic_read(&state->count) != 1); |
| 1603 | nfs4_close_state(state, state->state); |
| 1604 | } |
| 1605 | } |
| 1606 | |
| 1607 | |
| 1608 | static int nfs4_fill_super(struct super_block *sb, struct nfs4_mount_data *data, int silent) |
| 1609 | { |
| 1610 | struct nfs_server *server; |
| 1611 | struct nfs4_client *clp = NULL; |
| 1612 | struct rpc_xprt *xprt = NULL; |
| 1613 | struct rpc_clnt *clnt = NULL; |
| 1614 | struct rpc_timeout timeparms; |
| 1615 | rpc_authflavor_t authflavour; |
| 1616 | int proto, err = -EIO; |
| 1617 | |
| 1618 | sb->s_blocksize_bits = 0; |
| 1619 | sb->s_blocksize = 0; |
| 1620 | server = NFS_SB(sb); |
| 1621 | if (data->rsize != 0) |
| 1622 | server->rsize = nfs_block_size(data->rsize, NULL); |
| 1623 | if (data->wsize != 0) |
| 1624 | server->wsize = nfs_block_size(data->wsize, NULL); |
| 1625 | server->flags = data->flags & NFS_MOUNT_FLAGMASK; |
| 1626 | server->caps = NFS_CAP_ATOMIC_OPEN; |
| 1627 | |
| 1628 | server->acregmin = data->acregmin*HZ; |
| 1629 | server->acregmax = data->acregmax*HZ; |
| 1630 | server->acdirmin = data->acdirmin*HZ; |
| 1631 | server->acdirmax = data->acdirmax*HZ; |
| 1632 | |
| 1633 | server->rpc_ops = &nfs_v4_clientops; |
| 1634 | /* Initialize timeout values */ |
| 1635 | |
| 1636 | timeparms.to_initval = data->timeo * HZ / 10; |
| 1637 | timeparms.to_retries = data->retrans; |
| 1638 | timeparms.to_exponential = 1; |
| 1639 | if (!timeparms.to_retries) |
| 1640 | timeparms.to_retries = 5; |
| 1641 | |
| 1642 | proto = data->proto; |
| 1643 | /* Which IP protocol do we use? */ |
| 1644 | switch (proto) { |
| 1645 | case IPPROTO_TCP: |
| 1646 | timeparms.to_maxval = RPC_MAX_TCP_TIMEOUT; |
| 1647 | if (!timeparms.to_initval) |
| 1648 | timeparms.to_initval = 600 * HZ / 10; |
| 1649 | break; |
| 1650 | case IPPROTO_UDP: |
| 1651 | timeparms.to_maxval = RPC_MAX_UDP_TIMEOUT; |
| 1652 | if (!timeparms.to_initval) |
| 1653 | timeparms.to_initval = 11 * HZ / 10; |
| 1654 | break; |
| 1655 | default: |
| 1656 | return -EINVAL; |
| 1657 | } |
| 1658 | |
| 1659 | clp = nfs4_get_client(&server->addr.sin_addr); |
| 1660 | if (!clp) { |
Trond Myklebust | 9085bbc | 2005-06-22 17:16:20 +0000 | [diff] [blame] | 1661 | dprintk("%s: failed to create NFS4 client.\n", __FUNCTION__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1662 | return -EIO; |
| 1663 | } |
| 1664 | |
| 1665 | /* Now create transport and client */ |
| 1666 | authflavour = RPC_AUTH_UNIX; |
| 1667 | if (data->auth_flavourlen != 0) { |
Trond Myklebust | 9085bbc | 2005-06-22 17:16:20 +0000 | [diff] [blame] | 1668 | if (data->auth_flavourlen != 1) { |
| 1669 | dprintk("%s: Invalid number of RPC auth flavours %d.\n", |
| 1670 | __FUNCTION__, data->auth_flavourlen); |
| 1671 | err = -EINVAL; |
| 1672 | goto out_fail; |
| 1673 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1674 | if (copy_from_user(&authflavour, data->auth_flavours, sizeof(authflavour))) { |
| 1675 | err = -EFAULT; |
| 1676 | goto out_fail; |
| 1677 | } |
| 1678 | } |
| 1679 | |
| 1680 | down_write(&clp->cl_sem); |
J. Bruce Fields | 6a19275 | 2005-06-22 17:16:23 +0000 | [diff] [blame] | 1681 | if (IS_ERR(clp->cl_rpcclient)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1682 | xprt = xprt_create_proto(proto, &server->addr, &timeparms); |
| 1683 | if (IS_ERR(xprt)) { |
| 1684 | up_write(&clp->cl_sem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1685 | err = PTR_ERR(xprt); |
Trond Myklebust | 9085bbc | 2005-06-22 17:16:20 +0000 | [diff] [blame] | 1686 | dprintk("%s: cannot create RPC transport. Error = %d\n", |
| 1687 | __FUNCTION__, err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1688 | goto out_fail; |
| 1689 | } |
| 1690 | clnt = rpc_create_client(xprt, server->hostname, &nfs_program, |
| 1691 | server->rpc_ops->version, authflavour); |
| 1692 | if (IS_ERR(clnt)) { |
| 1693 | up_write(&clp->cl_sem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1694 | err = PTR_ERR(clnt); |
Trond Myklebust | 9085bbc | 2005-06-22 17:16:20 +0000 | [diff] [blame] | 1695 | dprintk("%s: cannot create RPC client. Error = %d\n", |
| 1696 | __FUNCTION__, err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1697 | goto out_fail; |
| 1698 | } |
| 1699 | clnt->cl_intr = 1; |
| 1700 | clnt->cl_softrtry = 1; |
| 1701 | clnt->cl_chatty = 1; |
| 1702 | clp->cl_rpcclient = clnt; |
| 1703 | clp->cl_cred = rpcauth_lookupcred(clnt->cl_auth, 0); |
| 1704 | if (IS_ERR(clp->cl_cred)) { |
| 1705 | up_write(&clp->cl_sem); |
| 1706 | err = PTR_ERR(clp->cl_cred); |
| 1707 | clp->cl_cred = NULL; |
| 1708 | goto out_fail; |
| 1709 | } |
| 1710 | memcpy(clp->cl_ipaddr, server->ip_addr, sizeof(clp->cl_ipaddr)); |
| 1711 | nfs_idmap_new(clp); |
| 1712 | } |
| 1713 | if (list_empty(&clp->cl_superblocks)) { |
| 1714 | err = nfs4_init_client(clp); |
| 1715 | if (err != 0) { |
| 1716 | up_write(&clp->cl_sem); |
| 1717 | goto out_fail; |
| 1718 | } |
| 1719 | } |
| 1720 | list_add_tail(&server->nfs4_siblings, &clp->cl_superblocks); |
| 1721 | clnt = rpc_clone_client(clp->cl_rpcclient); |
| 1722 | if (!IS_ERR(clnt)) |
| 1723 | server->nfs4_state = clp; |
| 1724 | up_write(&clp->cl_sem); |
| 1725 | clp = NULL; |
| 1726 | |
| 1727 | if (IS_ERR(clnt)) { |
Trond Myklebust | 9085bbc | 2005-06-22 17:16:20 +0000 | [diff] [blame] | 1728 | err = PTR_ERR(clnt); |
| 1729 | dprintk("%s: cannot create RPC client. Error = %d\n", |
| 1730 | __FUNCTION__, err); |
| 1731 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1732 | } |
| 1733 | |
| 1734 | server->client = clnt; |
| 1735 | |
| 1736 | if (server->nfs4_state->cl_idmap == NULL) { |
Trond Myklebust | 9085bbc | 2005-06-22 17:16:20 +0000 | [diff] [blame] | 1737 | dprintk("%s: failed to create idmapper.\n", __FUNCTION__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1738 | return -ENOMEM; |
| 1739 | } |
| 1740 | |
| 1741 | if (clnt->cl_auth->au_flavor != authflavour) { |
J. Bruce Fields | 6a19275 | 2005-06-22 17:16:23 +0000 | [diff] [blame] | 1742 | struct rpc_auth *auth; |
| 1743 | |
| 1744 | auth = rpcauth_create(authflavour, clnt); |
| 1745 | if (IS_ERR(auth)) { |
Trond Myklebust | 9085bbc | 2005-06-22 17:16:20 +0000 | [diff] [blame] | 1746 | dprintk("%s: couldn't create credcache!\n", __FUNCTION__); |
J. Bruce Fields | 6a19275 | 2005-06-22 17:16:23 +0000 | [diff] [blame] | 1747 | return PTR_ERR(auth); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1748 | } |
| 1749 | } |
| 1750 | |
| 1751 | sb->s_time_gran = 1; |
| 1752 | |
| 1753 | sb->s_op = &nfs4_sops; |
| 1754 | err = nfs_sb_init(sb, authflavour); |
| 1755 | if (err == 0) |
| 1756 | return 0; |
| 1757 | out_fail: |
| 1758 | if (clp) |
| 1759 | nfs4_put_client(clp); |
| 1760 | return err; |
| 1761 | } |
| 1762 | |
| 1763 | static int nfs4_compare_super(struct super_block *sb, void *data) |
| 1764 | { |
| 1765 | struct nfs_server *server = data; |
| 1766 | struct nfs_server *old = NFS_SB(sb); |
| 1767 | |
| 1768 | if (strcmp(server->hostname, old->hostname) != 0) |
| 1769 | return 0; |
| 1770 | if (strcmp(server->mnt_path, old->mnt_path) != 0) |
| 1771 | return 0; |
| 1772 | return 1; |
| 1773 | } |
| 1774 | |
| 1775 | static void * |
| 1776 | nfs_copy_user_string(char *dst, struct nfs_string *src, int maxlen) |
| 1777 | { |
| 1778 | void *p = NULL; |
| 1779 | |
| 1780 | if (!src->len) |
| 1781 | return ERR_PTR(-EINVAL); |
| 1782 | if (src->len < maxlen) |
| 1783 | maxlen = src->len; |
| 1784 | if (dst == NULL) { |
| 1785 | p = dst = kmalloc(maxlen + 1, GFP_KERNEL); |
| 1786 | if (p == NULL) |
| 1787 | return ERR_PTR(-ENOMEM); |
| 1788 | } |
| 1789 | if (copy_from_user(dst, src->data, maxlen)) { |
| 1790 | if (p != NULL) |
| 1791 | kfree(p); |
| 1792 | return ERR_PTR(-EFAULT); |
| 1793 | } |
| 1794 | dst[maxlen] = '\0'; |
| 1795 | return dst; |
| 1796 | } |
| 1797 | |
| 1798 | static struct super_block *nfs4_get_sb(struct file_system_type *fs_type, |
| 1799 | int flags, const char *dev_name, void *raw_data) |
| 1800 | { |
| 1801 | int error; |
| 1802 | struct nfs_server *server; |
| 1803 | struct super_block *s; |
| 1804 | struct nfs4_mount_data *data = raw_data; |
| 1805 | void *p; |
| 1806 | |
Trond Myklebust | 9085bbc | 2005-06-22 17:16:20 +0000 | [diff] [blame] | 1807 | if (data == NULL) { |
| 1808 | dprintk("%s: missing data argument\n", __FUNCTION__); |
| 1809 | return ERR_PTR(-EINVAL); |
| 1810 | } |
| 1811 | if (data->version <= 0 || data->version > NFS4_MOUNT_VERSION) { |
| 1812 | dprintk("%s: bad mount version\n", __FUNCTION__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1813 | return ERR_PTR(-EINVAL); |
| 1814 | } |
| 1815 | |
| 1816 | server = kmalloc(sizeof(struct nfs_server), GFP_KERNEL); |
| 1817 | if (!server) |
| 1818 | return ERR_PTR(-ENOMEM); |
| 1819 | memset(server, 0, sizeof(struct nfs_server)); |
| 1820 | /* Zero out the NFS state stuff */ |
| 1821 | init_nfsv4_state(server); |
Andreas Gruenbacher | b7fa055 | 2005-06-22 17:16:27 +0000 | [diff] [blame] | 1822 | server->client = server->client_sys = server->client_acl = ERR_PTR(-EINVAL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1823 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1824 | p = nfs_copy_user_string(NULL, &data->hostname, 256); |
| 1825 | if (IS_ERR(p)) |
| 1826 | goto out_err; |
| 1827 | server->hostname = p; |
| 1828 | |
| 1829 | p = nfs_copy_user_string(NULL, &data->mnt_path, 1024); |
| 1830 | if (IS_ERR(p)) |
| 1831 | goto out_err; |
| 1832 | server->mnt_path = p; |
| 1833 | |
| 1834 | p = nfs_copy_user_string(server->ip_addr, &data->client_addr, |
| 1835 | sizeof(server->ip_addr) - 1); |
| 1836 | if (IS_ERR(p)) |
| 1837 | goto out_err; |
| 1838 | |
| 1839 | /* We now require that the mount process passes the remote address */ |
| 1840 | if (data->host_addrlen != sizeof(server->addr)) { |
| 1841 | s = ERR_PTR(-EINVAL); |
| 1842 | goto out_free; |
| 1843 | } |
| 1844 | if (copy_from_user(&server->addr, data->host_addr, sizeof(server->addr))) { |
| 1845 | s = ERR_PTR(-EFAULT); |
| 1846 | goto out_free; |
| 1847 | } |
| 1848 | if (server->addr.sin_family != AF_INET || |
| 1849 | server->addr.sin_addr.s_addr == INADDR_ANY) { |
Trond Myklebust | 9085bbc | 2005-06-22 17:16:20 +0000 | [diff] [blame] | 1850 | dprintk("%s: mount program didn't pass remote IP address!\n", |
| 1851 | __FUNCTION__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1852 | s = ERR_PTR(-EINVAL); |
| 1853 | goto out_free; |
| 1854 | } |
| 1855 | |
Trond Myklebust | 9085bbc | 2005-06-22 17:16:20 +0000 | [diff] [blame] | 1856 | /* Fire up rpciod if not yet running */ |
| 1857 | s = ERR_PTR(rpciod_up()); |
| 1858 | if (IS_ERR(s)) { |
| 1859 | dprintk("%s: couldn't start rpciod! Error = %ld\n", |
| 1860 | __FUNCTION__, PTR_ERR(s)); |
| 1861 | goto out_free; |
| 1862 | } |
| 1863 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1864 | s = sget(fs_type, nfs4_compare_super, nfs_set_super, server); |
| 1865 | |
| 1866 | if (IS_ERR(s) || s->s_root) |
| 1867 | goto out_free; |
| 1868 | |
| 1869 | s->s_flags = flags; |
| 1870 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1871 | error = nfs4_fill_super(s, data, flags & MS_VERBOSE ? 1 : 0); |
| 1872 | if (error) { |
| 1873 | up_write(&s->s_umount); |
| 1874 | deactivate_super(s); |
| 1875 | return ERR_PTR(error); |
| 1876 | } |
| 1877 | s->s_flags |= MS_ACTIVE; |
| 1878 | return s; |
| 1879 | out_err: |
| 1880 | s = (struct super_block *)p; |
| 1881 | out_free: |
| 1882 | if (server->mnt_path) |
| 1883 | kfree(server->mnt_path); |
| 1884 | if (server->hostname) |
| 1885 | kfree(server->hostname); |
| 1886 | kfree(server); |
| 1887 | return s; |
| 1888 | } |
| 1889 | |
| 1890 | static void nfs4_kill_super(struct super_block *sb) |
| 1891 | { |
| 1892 | struct nfs_server *server = NFS_SB(sb); |
| 1893 | |
| 1894 | nfs_return_all_delegations(sb); |
| 1895 | kill_anon_super(sb); |
| 1896 | |
| 1897 | nfs4_renewd_prepare_shutdown(server); |
| 1898 | |
| 1899 | if (server->client != NULL && !IS_ERR(server->client)) |
| 1900 | rpc_shutdown_client(server->client); |
| 1901 | rpciod_down(); /* release rpciod */ |
| 1902 | |
| 1903 | destroy_nfsv4_state(server); |
| 1904 | |
| 1905 | if (server->hostname != NULL) |
| 1906 | kfree(server->hostname); |
| 1907 | kfree(server); |
| 1908 | } |
| 1909 | |
| 1910 | static struct file_system_type nfs4_fs_type = { |
| 1911 | .owner = THIS_MODULE, |
| 1912 | .name = "nfs4", |
| 1913 | .get_sb = nfs4_get_sb, |
| 1914 | .kill_sb = nfs4_kill_super, |
| 1915 | .fs_flags = FS_ODD_RENAME|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, |
| 1916 | }; |
| 1917 | |
| 1918 | #define nfs4_init_once(nfsi) \ |
| 1919 | do { \ |
| 1920 | INIT_LIST_HEAD(&(nfsi)->open_states); \ |
| 1921 | nfsi->delegation = NULL; \ |
| 1922 | nfsi->delegation_state = 0; \ |
| 1923 | init_rwsem(&nfsi->rwsem); \ |
| 1924 | } while(0) |
| 1925 | #define register_nfs4fs() register_filesystem(&nfs4_fs_type) |
| 1926 | #define unregister_nfs4fs() unregister_filesystem(&nfs4_fs_type) |
| 1927 | #else |
| 1928 | #define nfs4_init_once(nfsi) \ |
| 1929 | do { } while (0) |
| 1930 | #define register_nfs4fs() (0) |
| 1931 | #define unregister_nfs4fs() |
| 1932 | #endif |
| 1933 | |
| 1934 | extern int nfs_init_nfspagecache(void); |
| 1935 | extern void nfs_destroy_nfspagecache(void); |
| 1936 | extern int nfs_init_readpagecache(void); |
| 1937 | extern void nfs_destroy_readpagecache(void); |
| 1938 | extern int nfs_init_writepagecache(void); |
| 1939 | extern void nfs_destroy_writepagecache(void); |
| 1940 | #ifdef CONFIG_NFS_DIRECTIO |
| 1941 | extern int nfs_init_directcache(void); |
| 1942 | extern void nfs_destroy_directcache(void); |
| 1943 | #endif |
| 1944 | |
| 1945 | static kmem_cache_t * nfs_inode_cachep; |
| 1946 | |
| 1947 | static struct inode *nfs_alloc_inode(struct super_block *sb) |
| 1948 | { |
| 1949 | struct nfs_inode *nfsi; |
| 1950 | nfsi = (struct nfs_inode *)kmem_cache_alloc(nfs_inode_cachep, SLAB_KERNEL); |
| 1951 | if (!nfsi) |
| 1952 | return NULL; |
| 1953 | nfsi->flags = 0; |
Trond Myklebust | 458818e | 2005-06-22 17:16:27 +0000 | [diff] [blame] | 1954 | #ifdef CONFIG_NFS_V3_ACL |
| 1955 | nfsi->acl_access = ERR_PTR(-EAGAIN); |
| 1956 | nfsi->acl_default = ERR_PTR(-EAGAIN); |
| 1957 | #endif |
J. Bruce Fields | e50a1c2 | 2005-06-22 17:16:23 +0000 | [diff] [blame] | 1958 | #ifdef CONFIG_NFS_V4 |
| 1959 | nfsi->nfs4_acl = NULL; |
| 1960 | #endif /* CONFIG_NFS_V4 */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1961 | return &nfsi->vfs_inode; |
| 1962 | } |
| 1963 | |
| 1964 | static void nfs_destroy_inode(struct inode *inode) |
| 1965 | { |
| 1966 | kmem_cache_free(nfs_inode_cachep, NFS_I(inode)); |
| 1967 | } |
| 1968 | |
| 1969 | static void init_once(void * foo, kmem_cache_t * cachep, unsigned long flags) |
| 1970 | { |
| 1971 | struct nfs_inode *nfsi = (struct nfs_inode *) foo; |
| 1972 | |
| 1973 | if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) == |
| 1974 | SLAB_CTOR_CONSTRUCTOR) { |
| 1975 | inode_init_once(&nfsi->vfs_inode); |
| 1976 | spin_lock_init(&nfsi->req_lock); |
| 1977 | INIT_LIST_HEAD(&nfsi->dirty); |
| 1978 | INIT_LIST_HEAD(&nfsi->commit); |
| 1979 | INIT_LIST_HEAD(&nfsi->open_files); |
| 1980 | INIT_RADIX_TREE(&nfsi->nfs_page_tree, GFP_ATOMIC); |
| 1981 | atomic_set(&nfsi->data_updates, 0); |
| 1982 | nfsi->ndirty = 0; |
| 1983 | nfsi->ncommit = 0; |
| 1984 | nfsi->npages = 0; |
| 1985 | init_waitqueue_head(&nfsi->nfs_i_wait); |
| 1986 | nfs4_init_once(nfsi); |
| 1987 | } |
| 1988 | } |
| 1989 | |
Adrian Bunk | 75c96f8 | 2005-05-05 16:16:09 -0700 | [diff] [blame] | 1990 | static int nfs_init_inodecache(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1991 | { |
| 1992 | nfs_inode_cachep = kmem_cache_create("nfs_inode_cache", |
| 1993 | sizeof(struct nfs_inode), |
| 1994 | 0, SLAB_RECLAIM_ACCOUNT, |
| 1995 | init_once, NULL); |
| 1996 | if (nfs_inode_cachep == NULL) |
| 1997 | return -ENOMEM; |
| 1998 | |
| 1999 | return 0; |
| 2000 | } |
| 2001 | |
Adrian Bunk | 75c96f8 | 2005-05-05 16:16:09 -0700 | [diff] [blame] | 2002 | static void nfs_destroy_inodecache(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2003 | { |
| 2004 | if (kmem_cache_destroy(nfs_inode_cachep)) |
| 2005 | printk(KERN_INFO "nfs_inode_cache: not all structures were freed\n"); |
| 2006 | } |
| 2007 | |
| 2008 | /* |
| 2009 | * Initialize NFS |
| 2010 | */ |
| 2011 | static int __init init_nfs_fs(void) |
| 2012 | { |
| 2013 | int err; |
| 2014 | |
| 2015 | err = nfs_init_nfspagecache(); |
| 2016 | if (err) |
| 2017 | goto out4; |
| 2018 | |
| 2019 | err = nfs_init_inodecache(); |
| 2020 | if (err) |
| 2021 | goto out3; |
| 2022 | |
| 2023 | err = nfs_init_readpagecache(); |
| 2024 | if (err) |
| 2025 | goto out2; |
| 2026 | |
| 2027 | err = nfs_init_writepagecache(); |
| 2028 | if (err) |
| 2029 | goto out1; |
| 2030 | |
| 2031 | #ifdef CONFIG_NFS_DIRECTIO |
| 2032 | err = nfs_init_directcache(); |
| 2033 | if (err) |
| 2034 | goto out0; |
| 2035 | #endif |
| 2036 | |
| 2037 | #ifdef CONFIG_PROC_FS |
| 2038 | rpc_proc_register(&nfs_rpcstat); |
| 2039 | #endif |
| 2040 | err = register_filesystem(&nfs_fs_type); |
| 2041 | if (err) |
| 2042 | goto out; |
| 2043 | if ((err = register_nfs4fs()) != 0) |
| 2044 | goto out; |
| 2045 | return 0; |
| 2046 | out: |
| 2047 | #ifdef CONFIG_PROC_FS |
| 2048 | rpc_proc_unregister("nfs"); |
| 2049 | #endif |
| 2050 | nfs_destroy_writepagecache(); |
| 2051 | #ifdef CONFIG_NFS_DIRECTIO |
| 2052 | out0: |
| 2053 | nfs_destroy_directcache(); |
| 2054 | #endif |
| 2055 | out1: |
| 2056 | nfs_destroy_readpagecache(); |
| 2057 | out2: |
| 2058 | nfs_destroy_inodecache(); |
| 2059 | out3: |
| 2060 | nfs_destroy_nfspagecache(); |
| 2061 | out4: |
| 2062 | return err; |
| 2063 | } |
| 2064 | |
| 2065 | static void __exit exit_nfs_fs(void) |
| 2066 | { |
| 2067 | #ifdef CONFIG_NFS_DIRECTIO |
| 2068 | nfs_destroy_directcache(); |
| 2069 | #endif |
| 2070 | nfs_destroy_writepagecache(); |
| 2071 | nfs_destroy_readpagecache(); |
| 2072 | nfs_destroy_inodecache(); |
| 2073 | nfs_destroy_nfspagecache(); |
| 2074 | #ifdef CONFIG_PROC_FS |
| 2075 | rpc_proc_unregister("nfs"); |
| 2076 | #endif |
| 2077 | unregister_filesystem(&nfs_fs_type); |
| 2078 | unregister_nfs4fs(); |
| 2079 | } |
| 2080 | |
| 2081 | /* Not quite true; I just maintain it */ |
| 2082 | MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>"); |
| 2083 | MODULE_LICENSE("GPL"); |
| 2084 | |
| 2085 | module_init(init_nfs_fs) |
| 2086 | module_exit(exit_nfs_fs) |