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> |
Chuck Lever | 4ece3a2 | 2006-03-20 13:44:22 -0500 | [diff] [blame] | 29 | #include <linux/sunrpc/metrics.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | #include <linux/nfs_fs.h> |
| 31 | #include <linux/nfs_mount.h> |
| 32 | #include <linux/nfs4_mount.h> |
| 33 | #include <linux/lockd/bind.h> |
| 34 | #include <linux/smp_lock.h> |
| 35 | #include <linux/seq_file.h> |
| 36 | #include <linux/mount.h> |
| 37 | #include <linux/nfs_idmap.h> |
| 38 | #include <linux/vfs.h> |
| 39 | |
| 40 | #include <asm/system.h> |
| 41 | #include <asm/uaccess.h> |
| 42 | |
Trond Myklebust | 4ce7971 | 2005-06-22 17:16:21 +0000 | [diff] [blame] | 43 | #include "nfs4_fs.h" |
Trond Myklebust | a72b442 | 2006-01-03 09:55:41 +0100 | [diff] [blame] | 44 | #include "callback.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | #include "delegation.h" |
Chuck Lever | d9ef5a8 | 2006-03-20 13:44:13 -0500 | [diff] [blame] | 46 | #include "iostat.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 47 | |
| 48 | #define NFSDBG_FACILITY NFSDBG_VFS |
| 49 | #define NFS_PARANOIA 1 |
| 50 | |
| 51 | /* Maximum number of readahead requests |
| 52 | * FIXME: this should really be a sysctl so that users may tune it to suit |
| 53 | * their needs. People that do NFS over a slow network, might for |
| 54 | * instance want to reduce it to something closer to 1 for improved |
| 55 | * interactive response. |
| 56 | */ |
| 57 | #define NFS_MAX_READAHEAD (RPC_DEF_SLOT_TABLE - 1) |
| 58 | |
| 59 | static void nfs_invalidate_inode(struct inode *); |
Trond Myklebust | 24aa1fe | 2005-12-03 15:20:07 -0500 | [diff] [blame] | 60 | static int nfs_update_inode(struct inode *, struct nfs_fattr *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 61 | |
| 62 | static struct inode *nfs_alloc_inode(struct super_block *sb); |
| 63 | static void nfs_destroy_inode(struct inode *); |
| 64 | static int nfs_write_inode(struct inode *,int); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 65 | static void nfs_clear_inode(struct inode *); |
Trond Myklebust | 8b512d9 | 2006-06-09 09:34:18 -0400 | [diff] [blame] | 66 | static void nfs_umount_begin(struct vfsmount *, int); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 67 | static int nfs_statfs(struct super_block *, struct kstatfs *); |
| 68 | static int nfs_show_options(struct seq_file *, struct vfsmount *); |
Chuck Lever | d9ef5a8 | 2006-03-20 13:44:13 -0500 | [diff] [blame] | 69 | static int nfs_show_stats(struct seq_file *, struct vfsmount *); |
Trond Myklebust | ada70d9 | 2005-06-22 17:16:22 +0000 | [diff] [blame] | 70 | static void nfs_zap_acl_cache(struct inode *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 71 | |
| 72 | static struct rpc_program nfs_program; |
| 73 | |
| 74 | static struct super_operations nfs_sops = { |
| 75 | .alloc_inode = nfs_alloc_inode, |
| 76 | .destroy_inode = nfs_destroy_inode, |
| 77 | .write_inode = nfs_write_inode, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 78 | .statfs = nfs_statfs, |
| 79 | .clear_inode = nfs_clear_inode, |
| 80 | .umount_begin = nfs_umount_begin, |
| 81 | .show_options = nfs_show_options, |
Chuck Lever | d9ef5a8 | 2006-03-20 13:44:13 -0500 | [diff] [blame] | 82 | .show_stats = nfs_show_stats, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 83 | }; |
| 84 | |
| 85 | /* |
| 86 | * RPC cruft for NFS |
| 87 | */ |
| 88 | static struct rpc_stat nfs_rpcstat = { |
| 89 | .program = &nfs_program |
| 90 | }; |
| 91 | static struct rpc_version * nfs_version[] = { |
| 92 | NULL, |
| 93 | NULL, |
| 94 | &nfs_version2, |
| 95 | #if defined(CONFIG_NFS_V3) |
| 96 | &nfs_version3, |
| 97 | #elif defined(CONFIG_NFS_V4) |
| 98 | NULL, |
| 99 | #endif |
| 100 | #if defined(CONFIG_NFS_V4) |
| 101 | &nfs_version4, |
| 102 | #endif |
| 103 | }; |
| 104 | |
| 105 | static struct rpc_program nfs_program = { |
| 106 | .name = "nfs", |
| 107 | .number = NFS_PROGRAM, |
Tobias Klauser | e8c96f8 | 2006-03-24 03:15:34 -0800 | [diff] [blame] | 108 | .nrvers = ARRAY_SIZE(nfs_version), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 109 | .version = nfs_version, |
| 110 | .stats = &nfs_rpcstat, |
| 111 | .pipe_dir_name = "/nfs", |
| 112 | }; |
| 113 | |
Andreas Gruenbacher | b7fa055 | 2005-06-22 17:16:27 +0000 | [diff] [blame] | 114 | #ifdef CONFIG_NFS_V3_ACL |
| 115 | static struct rpc_stat nfsacl_rpcstat = { &nfsacl_program }; |
| 116 | static struct rpc_version * nfsacl_version[] = { |
| 117 | [3] = &nfsacl_version3, |
| 118 | }; |
| 119 | |
| 120 | struct rpc_program nfsacl_program = { |
| 121 | .name = "nfsacl", |
| 122 | .number = NFS_ACL_PROGRAM, |
Tobias Klauser | e8c96f8 | 2006-03-24 03:15:34 -0800 | [diff] [blame] | 123 | .nrvers = ARRAY_SIZE(nfsacl_version), |
Andreas Gruenbacher | b7fa055 | 2005-06-22 17:16:27 +0000 | [diff] [blame] | 124 | .version = nfsacl_version, |
| 125 | .stats = &nfsacl_rpcstat, |
| 126 | }; |
| 127 | #endif /* CONFIG_NFS_V3_ACL */ |
| 128 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 129 | static inline unsigned long |
| 130 | nfs_fattr_to_ino_t(struct nfs_fattr *fattr) |
| 131 | { |
| 132 | return nfs_fileid_to_ino_t(fattr->fileid); |
| 133 | } |
| 134 | |
| 135 | static int |
| 136 | nfs_write_inode(struct inode *inode, int sync) |
| 137 | { |
Trond Myklebust | c42de9d | 2006-03-20 13:44:51 -0500 | [diff] [blame] | 138 | int flags = sync ? FLUSH_SYNC : 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 139 | int ret; |
| 140 | |
Trond Myklebust | 3da28eb | 2005-06-22 17:16:31 +0000 | [diff] [blame] | 141 | ret = nfs_commit_inode(inode, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 142 | if (ret < 0) |
| 143 | return ret; |
| 144 | return 0; |
| 145 | } |
| 146 | |
| 147 | static void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 148 | nfs_clear_inode(struct inode *inode) |
| 149 | { |
| 150 | struct nfs_inode *nfsi = NFS_I(inode); |
| 151 | struct rpc_cred *cred; |
| 152 | |
Trond Myklebust | da6d503 | 2006-06-01 17:26:35 -0400 | [diff] [blame] | 153 | /* |
| 154 | * The following should never happen... |
| 155 | */ |
| 156 | BUG_ON(nfs_have_writebacks(inode)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 157 | BUG_ON (!list_empty(&nfsi->open_files)); |
Trond Myklebust | ada70d9 | 2005-06-22 17:16:22 +0000 | [diff] [blame] | 158 | nfs_zap_acl_cache(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 159 | cred = nfsi->cache_access.cred; |
| 160 | if (cred) |
| 161 | put_rpccred(cred); |
| 162 | BUG_ON(atomic_read(&nfsi->data_updates) != 0); |
| 163 | } |
| 164 | |
Trond Myklebust | 8b512d9 | 2006-06-09 09:34:18 -0400 | [diff] [blame] | 165 | static void nfs_umount_begin(struct vfsmount *vfsmnt, int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 166 | { |
Trond Myklebust | 8b512d9 | 2006-06-09 09:34:18 -0400 | [diff] [blame] | 167 | struct nfs_server *server; |
| 168 | struct rpc_clnt *rpc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 169 | |
Trond Myklebust | 51d8fa6 | 2006-06-09 09:34:20 -0400 | [diff] [blame] | 170 | shrink_submounts(vfsmnt, &nfs_automount_list); |
Trond Myklebust | 8b512d9 | 2006-06-09 09:34:18 -0400 | [diff] [blame] | 171 | if (!(flags & MNT_FORCE)) |
| 172 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 173 | /* -EIO all pending I/O */ |
Trond Myklebust | 8b512d9 | 2006-06-09 09:34:18 -0400 | [diff] [blame] | 174 | server = NFS_SB(vfsmnt->mnt_sb); |
| 175 | rpc = server->client; |
J. Bruce Fields | 6a19275 | 2005-06-22 17:16:23 +0000 | [diff] [blame] | 176 | if (!IS_ERR(rpc)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 177 | rpc_killall_tasks(rpc); |
Trond Myklebust | 8b512d9 | 2006-06-09 09:34:18 -0400 | [diff] [blame] | 178 | rpc = server->client_acl; |
Andreas Gruenbacher | b7fa055 | 2005-06-22 17:16:27 +0000 | [diff] [blame] | 179 | if (!IS_ERR(rpc)) |
| 180 | rpc_killall_tasks(rpc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 181 | } |
| 182 | |
| 183 | |
| 184 | static inline unsigned long |
| 185 | nfs_block_bits(unsigned long bsize, unsigned char *nrbitsp) |
| 186 | { |
| 187 | /* make sure blocksize is a power of two */ |
| 188 | if ((bsize & (bsize - 1)) || nrbitsp) { |
| 189 | unsigned char nrbits; |
| 190 | |
| 191 | for (nrbits = 31; nrbits && !(bsize & (1 << nrbits)); nrbits--) |
| 192 | ; |
| 193 | bsize = 1 << nrbits; |
| 194 | if (nrbitsp) |
| 195 | *nrbitsp = nrbits; |
| 196 | } |
| 197 | |
| 198 | return bsize; |
| 199 | } |
| 200 | |
| 201 | /* |
| 202 | * Calculate the number of 512byte blocks used. |
| 203 | */ |
| 204 | static inline unsigned long |
| 205 | nfs_calc_block_size(u64 tsize) |
| 206 | { |
| 207 | loff_t used = (tsize + 511) >> 9; |
| 208 | return (used > ULONG_MAX) ? ULONG_MAX : used; |
| 209 | } |
| 210 | |
| 211 | /* |
| 212 | * Compute and set NFS server blocksize |
| 213 | */ |
| 214 | static inline unsigned long |
| 215 | nfs_block_size(unsigned long bsize, unsigned char *nrbitsp) |
| 216 | { |
Chuck Lever | 40859d7 | 2005-11-30 18:09:02 -0500 | [diff] [blame] | 217 | if (bsize < NFS_MIN_FILE_IO_SIZE) |
| 218 | bsize = NFS_DEF_FILE_IO_SIZE; |
| 219 | else if (bsize >= NFS_MAX_FILE_IO_SIZE) |
| 220 | bsize = NFS_MAX_FILE_IO_SIZE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 221 | |
| 222 | return nfs_block_bits(bsize, nrbitsp); |
| 223 | } |
| 224 | |
Trond Myklebust | 55a9759 | 2006-06-09 09:34:19 -0400 | [diff] [blame] | 225 | static inline void |
| 226 | nfs_super_set_maxbytes(struct super_block *sb, __u64 maxfilesize) |
| 227 | { |
| 228 | sb->s_maxbytes = (loff_t)maxfilesize; |
| 229 | if (sb->s_maxbytes > MAX_LFS_FILESIZE || sb->s_maxbytes <= 0) |
| 230 | sb->s_maxbytes = MAX_LFS_FILESIZE; |
| 231 | } |
| 232 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 233 | /* |
| 234 | * Obtain the root inode of the file system. |
| 235 | */ |
| 236 | static struct inode * |
| 237 | nfs_get_root(struct super_block *sb, struct nfs_fh *rootfh, struct nfs_fsinfo *fsinfo) |
| 238 | { |
| 239 | struct nfs_server *server = NFS_SB(sb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 240 | int error; |
| 241 | |
| 242 | error = server->rpc_ops->getroot(server, rootfh, fsinfo); |
| 243 | if (error < 0) { |
| 244 | dprintk("nfs_get_root: getattr error = %d\n", -error); |
| 245 | return ERR_PTR(error); |
| 246 | } |
| 247 | |
Trond Myklebust | 8b4bdcf | 2006-06-09 09:34:19 -0400 | [diff] [blame] | 248 | server->fsid = fsinfo->fattr->fsid; |
Trond Myklebust | 03f28e3 | 2006-03-20 13:44:48 -0500 | [diff] [blame] | 249 | return nfs_fhget(sb, rootfh, fsinfo->fattr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Trond Myklebust | 01d0ae8 | 2006-03-20 13:44:48 -0500 | [diff] [blame] | 277 | server->io_stats = nfs_alloc_iostats(); |
| 278 | if (server->io_stats == NULL) |
| 279 | return -ENOMEM; |
| 280 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 281 | root_inode = nfs_get_root(sb, &server->fh, &fsinfo); |
| 282 | /* Did getting the root inode fail? */ |
| 283 | if (IS_ERR(root_inode)) { |
| 284 | no_root_error = PTR_ERR(root_inode); |
| 285 | goto out_no_root; |
| 286 | } |
| 287 | sb->s_root = d_alloc_root(root_inode); |
| 288 | if (!sb->s_root) { |
| 289 | no_root_error = -ENOMEM; |
| 290 | goto out_no_root; |
| 291 | } |
| 292 | sb->s_root->d_op = server->rpc_ops->dentry_ops; |
| 293 | |
Chuck Lever | 67ec9f4 | 2006-03-20 13:44:15 -0500 | [diff] [blame] | 294 | /* mount time stamp, in seconds */ |
| 295 | server->mount_time = jiffies; |
| 296 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 297 | /* Get some general file system info */ |
| 298 | if (server->namelen == 0 && |
| 299 | server->rpc_ops->pathconf(server, &server->fh, &pathinfo) >= 0) |
| 300 | server->namelen = pathinfo.max_namelen; |
| 301 | /* Work out a lot of parameters */ |
| 302 | if (server->rsize == 0) |
| 303 | server->rsize = nfs_block_size(fsinfo.rtpref, NULL); |
| 304 | if (server->wsize == 0) |
| 305 | server->wsize = nfs_block_size(fsinfo.wtpref, NULL); |
| 306 | |
| 307 | if (fsinfo.rtmax >= 512 && server->rsize > fsinfo.rtmax) |
| 308 | server->rsize = nfs_block_size(fsinfo.rtmax, NULL); |
| 309 | if (fsinfo.wtmax >= 512 && server->wsize > fsinfo.wtmax) |
| 310 | server->wsize = nfs_block_size(fsinfo.wtmax, NULL); |
| 311 | |
| 312 | max_rpc_payload = nfs_block_size(rpc_max_payload(server->client), NULL); |
| 313 | if (server->rsize > max_rpc_payload) |
| 314 | server->rsize = max_rpc_payload; |
Chuck Lever | 40859d7 | 2005-11-30 18:09:02 -0500 | [diff] [blame] | 315 | if (server->rsize > NFS_MAX_FILE_IO_SIZE) |
| 316 | server->rsize = NFS_MAX_FILE_IO_SIZE; |
| 317 | server->rpages = (server->rsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; |
| 318 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 319 | if (server->wsize > max_rpc_payload) |
| 320 | server->wsize = max_rpc_payload; |
Chuck Lever | 40859d7 | 2005-11-30 18:09:02 -0500 | [diff] [blame] | 321 | if (server->wsize > NFS_MAX_FILE_IO_SIZE) |
| 322 | server->wsize = NFS_MAX_FILE_IO_SIZE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 323 | server->wpages = (server->wsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 324 | |
| 325 | if (sb->s_blocksize == 0) |
| 326 | sb->s_blocksize = nfs_block_bits(server->wsize, |
| 327 | &sb->s_blocksize_bits); |
| 328 | server->wtmult = nfs_block_bits(fsinfo.wtmult, NULL); |
| 329 | |
| 330 | server->dtsize = nfs_block_size(fsinfo.dtpref, NULL); |
| 331 | if (server->dtsize > PAGE_CACHE_SIZE) |
| 332 | server->dtsize = PAGE_CACHE_SIZE; |
| 333 | if (server->dtsize > server->rsize) |
| 334 | server->dtsize = server->rsize; |
| 335 | |
| 336 | if (server->flags & NFS_MOUNT_NOAC) { |
| 337 | server->acregmin = server->acregmax = 0; |
| 338 | server->acdirmin = server->acdirmax = 0; |
| 339 | sb->s_flags |= MS_SYNCHRONOUS; |
| 340 | } |
| 341 | server->backing_dev_info.ra_pages = server->rpages * NFS_MAX_READAHEAD; |
| 342 | |
Trond Myklebust | 55a9759 | 2006-06-09 09:34:19 -0400 | [diff] [blame] | 343 | nfs_super_set_maxbytes(sb, fsinfo.maxfilesize); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Chuck Lever | eab5c08 | 2005-08-11 16:25:14 -0400 | [diff] [blame] | 359 | static void nfs_init_timeout_values(struct rpc_timeout *to, int proto, unsigned int timeo, unsigned int retrans) |
| 360 | { |
| 361 | to->to_initval = timeo * HZ / 10; |
| 362 | to->to_retries = retrans; |
| 363 | if (!to->to_retries) |
| 364 | to->to_retries = 2; |
| 365 | |
| 366 | switch (proto) { |
| 367 | case IPPROTO_TCP: |
| 368 | if (!to->to_initval) |
| 369 | to->to_initval = 60 * HZ; |
Chuck Lever | 03bf4b7 | 2005-08-25 16:25:55 -0700 | [diff] [blame] | 370 | if (to->to_initval > NFS_MAX_TCP_TIMEOUT) |
| 371 | to->to_initval = NFS_MAX_TCP_TIMEOUT; |
Chuck Lever | eab5c08 | 2005-08-11 16:25:14 -0400 | [diff] [blame] | 372 | to->to_increment = to->to_initval; |
| 373 | to->to_maxval = to->to_initval + (to->to_increment * to->to_retries); |
| 374 | to->to_exponential = 0; |
| 375 | break; |
| 376 | case IPPROTO_UDP: |
| 377 | default: |
| 378 | if (!to->to_initval) |
| 379 | to->to_initval = 11 * HZ / 10; |
Chuck Lever | 03bf4b7 | 2005-08-25 16:25:55 -0700 | [diff] [blame] | 380 | if (to->to_initval > NFS_MAX_UDP_TIMEOUT) |
| 381 | to->to_initval = NFS_MAX_UDP_TIMEOUT; |
| 382 | to->to_maxval = NFS_MAX_UDP_TIMEOUT; |
Chuck Lever | eab5c08 | 2005-08-11 16:25:14 -0400 | [diff] [blame] | 383 | to->to_exponential = 1; |
| 384 | break; |
| 385 | } |
| 386 | } |
| 387 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 388 | /* |
| 389 | * Create an RPC client handle. |
| 390 | */ |
| 391 | static struct rpc_clnt * |
| 392 | nfs_create_client(struct nfs_server *server, const struct nfs_mount_data *data) |
| 393 | { |
| 394 | struct rpc_timeout timeparms; |
| 395 | struct rpc_xprt *xprt = NULL; |
| 396 | struct rpc_clnt *clnt = NULL; |
Chuck Lever | eab5c08 | 2005-08-11 16:25:14 -0400 | [diff] [blame] | 397 | int proto = (data->flags & NFS_MOUNT_TCP) ? IPPROTO_TCP : IPPROTO_UDP; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 398 | |
Chuck Lever | eab5c08 | 2005-08-11 16:25:14 -0400 | [diff] [blame] | 399 | nfs_init_timeout_values(&timeparms, proto, data->timeo, data->retrans); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 400 | |
Chuck Lever | 7a480e2 | 2006-03-20 13:44:12 -0500 | [diff] [blame] | 401 | server->retrans_timeo = timeparms.to_initval; |
| 402 | server->retrans_count = timeparms.to_retries; |
| 403 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 404 | /* create transport and client */ |
Chuck Lever | eab5c08 | 2005-08-11 16:25:14 -0400 | [diff] [blame] | 405 | xprt = xprt_create_proto(proto, &server->addr, &timeparms); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 406 | if (IS_ERR(xprt)) { |
Trond Myklebust | 9085bbc | 2005-06-22 17:16:20 +0000 | [diff] [blame] | 407 | dprintk("%s: cannot create RPC transport. Error = %ld\n", |
| 408 | __FUNCTION__, PTR_ERR(xprt)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 409 | return (struct rpc_clnt *)xprt; |
| 410 | } |
| 411 | clnt = rpc_create_client(xprt, server->hostname, &nfs_program, |
| 412 | server->rpc_ops->version, data->pseudoflavor); |
| 413 | if (IS_ERR(clnt)) { |
Trond Myklebust | 9085bbc | 2005-06-22 17:16:20 +0000 | [diff] [blame] | 414 | dprintk("%s: cannot create RPC client. Error = %ld\n", |
| 415 | __FUNCTION__, PTR_ERR(xprt)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 416 | goto out_fail; |
| 417 | } |
| 418 | |
| 419 | clnt->cl_intr = 1; |
| 420 | clnt->cl_softrtry = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 421 | |
| 422 | return clnt; |
| 423 | |
| 424 | out_fail: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 425 | return clnt; |
| 426 | } |
| 427 | |
| 428 | /* |
| 429 | * The way this works is that the mount process passes a structure |
| 430 | * in the data argument which contains the server's IP address |
| 431 | * and the root file handle obtained from the server's mount |
| 432 | * daemon. We stash these away in the private superblock fields. |
| 433 | */ |
| 434 | static int |
| 435 | nfs_fill_super(struct super_block *sb, struct nfs_mount_data *data, int silent) |
| 436 | { |
| 437 | struct nfs_server *server; |
| 438 | rpc_authflavor_t authflavor; |
| 439 | |
| 440 | server = NFS_SB(sb); |
| 441 | sb->s_blocksize_bits = 0; |
| 442 | sb->s_blocksize = 0; |
| 443 | if (data->bsize) |
| 444 | sb->s_blocksize = nfs_block_size(data->bsize, &sb->s_blocksize_bits); |
| 445 | if (data->rsize) |
| 446 | server->rsize = nfs_block_size(data->rsize, NULL); |
| 447 | if (data->wsize) |
| 448 | server->wsize = nfs_block_size(data->wsize, NULL); |
| 449 | server->flags = data->flags & NFS_MOUNT_FLAGMASK; |
| 450 | |
| 451 | server->acregmin = data->acregmin*HZ; |
| 452 | server->acregmax = data->acregmax*HZ; |
| 453 | server->acdirmin = data->acdirmin*HZ; |
| 454 | server->acdirmax = data->acdirmax*HZ; |
| 455 | |
| 456 | /* Start lockd here, before we might error out */ |
| 457 | if (!(server->flags & NFS_MOUNT_NONLM)) |
| 458 | lockd_up(); |
| 459 | |
| 460 | server->namelen = data->namlen; |
| 461 | server->hostname = kmalloc(strlen(data->hostname) + 1, GFP_KERNEL); |
| 462 | if (!server->hostname) |
| 463 | return -ENOMEM; |
| 464 | strcpy(server->hostname, data->hostname); |
| 465 | |
| 466 | /* Check NFS protocol revision and initialize RPC op vector |
| 467 | * and file handle pool. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 468 | #ifdef CONFIG_NFS_V3 |
Trond Myklebust | 9085bbc | 2005-06-22 17:16:20 +0000 | [diff] [blame] | 469 | if (server->flags & NFS_MOUNT_VER3) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 470 | server->rpc_ops = &nfs_v3_clientops; |
| 471 | server->caps |= NFS_CAP_READDIRPLUS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 472 | } else { |
| 473 | server->rpc_ops = &nfs_v2_clientops; |
| 474 | } |
Trond Myklebust | 9085bbc | 2005-06-22 17:16:20 +0000 | [diff] [blame] | 475 | #else |
| 476 | server->rpc_ops = &nfs_v2_clientops; |
| 477 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 478 | |
| 479 | /* Fill in pseudoflavor for mount version < 5 */ |
| 480 | if (!(data->flags & NFS_MOUNT_SECFLAVOUR)) |
| 481 | data->pseudoflavor = RPC_AUTH_UNIX; |
| 482 | authflavor = data->pseudoflavor; /* save for sb_init() */ |
| 483 | /* XXX maybe we want to add a server->pseudoflavor field */ |
| 484 | |
| 485 | /* Create RPC client handles */ |
| 486 | server->client = nfs_create_client(server, data); |
| 487 | if (IS_ERR(server->client)) |
| 488 | return PTR_ERR(server->client); |
| 489 | /* RFC 2623, sec 2.3.2 */ |
| 490 | if (authflavor != RPC_AUTH_UNIX) { |
J. Bruce Fields | 6a19275 | 2005-06-22 17:16:23 +0000 | [diff] [blame] | 491 | struct rpc_auth *auth; |
| 492 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 493 | server->client_sys = rpc_clone_client(server->client); |
| 494 | if (IS_ERR(server->client_sys)) |
| 495 | return PTR_ERR(server->client_sys); |
J. Bruce Fields | 6a19275 | 2005-06-22 17:16:23 +0000 | [diff] [blame] | 496 | auth = rpcauth_create(RPC_AUTH_UNIX, server->client_sys); |
| 497 | if (IS_ERR(auth)) |
| 498 | return PTR_ERR(auth); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 499 | } else { |
| 500 | atomic_inc(&server->client->cl_count); |
| 501 | server->client_sys = server->client; |
| 502 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 503 | if (server->flags & NFS_MOUNT_VER3) { |
Andreas Gruenbacher | b7fa055 | 2005-06-22 17:16:27 +0000 | [diff] [blame] | 504 | #ifdef CONFIG_NFS_V3_ACL |
| 505 | if (!(server->flags & NFS_MOUNT_NOACL)) { |
| 506 | server->client_acl = rpc_bind_new_program(server->client, &nfsacl_program, 3); |
| 507 | /* No errors! Assume that Sun nfsacls are supported */ |
| 508 | if (!IS_ERR(server->client_acl)) |
| 509 | server->caps |= NFS_CAP_ACLS; |
| 510 | } |
| 511 | #else |
| 512 | server->flags &= ~NFS_MOUNT_NOACL; |
| 513 | #endif /* CONFIG_NFS_V3_ACL */ |
Andreas Gruenbacher | 055ffbe | 2005-06-22 17:16:27 +0000 | [diff] [blame] | 514 | /* |
| 515 | * The VFS shouldn't apply the umask to mode bits. We will |
| 516 | * do so ourselves when necessary. |
| 517 | */ |
| 518 | sb->s_flags |= MS_POSIXACL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 519 | if (server->namelen == 0 || server->namelen > NFS3_MAXNAMLEN) |
| 520 | server->namelen = NFS3_MAXNAMLEN; |
| 521 | sb->s_time_gran = 1; |
| 522 | } else { |
| 523 | if (server->namelen == 0 || server->namelen > NFS2_MAXNAMLEN) |
| 524 | server->namelen = NFS2_MAXNAMLEN; |
| 525 | } |
| 526 | |
| 527 | sb->s_op = &nfs_sops; |
| 528 | return nfs_sb_init(sb, authflavor); |
| 529 | } |
| 530 | |
| 531 | static int |
| 532 | nfs_statfs(struct super_block *sb, struct kstatfs *buf) |
| 533 | { |
| 534 | struct nfs_server *server = NFS_SB(sb); |
| 535 | unsigned char blockbits; |
| 536 | unsigned long blockres; |
| 537 | struct nfs_fh *rootfh = NFS_FH(sb->s_root->d_inode); |
| 538 | struct nfs_fattr fattr; |
| 539 | struct nfs_fsstat res = { |
| 540 | .fattr = &fattr, |
| 541 | }; |
| 542 | int error; |
| 543 | |
| 544 | lock_kernel(); |
| 545 | |
| 546 | error = server->rpc_ops->statfs(server, rootfh, &res); |
| 547 | buf->f_type = NFS_SUPER_MAGIC; |
| 548 | if (error < 0) |
| 549 | goto out_err; |
| 550 | |
| 551 | /* |
| 552 | * Current versions of glibc do not correctly handle the |
| 553 | * case where f_frsize != f_bsize. Eventually we want to |
| 554 | * report the value of wtmult in this field. |
| 555 | */ |
| 556 | buf->f_frsize = sb->s_blocksize; |
| 557 | |
| 558 | /* |
| 559 | * On most *nix systems, f_blocks, f_bfree, and f_bavail |
| 560 | * are reported in units of f_frsize. Linux hasn't had |
| 561 | * an f_frsize field in its statfs struct until recently, |
| 562 | * thus historically Linux's sys_statfs reports these |
| 563 | * fields in units of f_bsize. |
| 564 | */ |
| 565 | buf->f_bsize = sb->s_blocksize; |
| 566 | blockbits = sb->s_blocksize_bits; |
| 567 | blockres = (1 << blockbits) - 1; |
| 568 | buf->f_blocks = (res.tbytes + blockres) >> blockbits; |
| 569 | buf->f_bfree = (res.fbytes + blockres) >> blockbits; |
| 570 | buf->f_bavail = (res.abytes + blockres) >> blockbits; |
| 571 | |
| 572 | buf->f_files = res.tfiles; |
| 573 | buf->f_ffree = res.afiles; |
| 574 | |
| 575 | buf->f_namelen = server->namelen; |
| 576 | out: |
| 577 | unlock_kernel(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 578 | return 0; |
| 579 | |
| 580 | out_err: |
Chuck Lever | dc20f80 | 2005-11-30 18:08:57 -0500 | [diff] [blame] | 581 | dprintk("%s: statfs error = %d\n", __FUNCTION__, -error); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 582 | buf->f_bsize = buf->f_blocks = buf->f_bfree = buf->f_bavail = -1; |
| 583 | goto out; |
| 584 | |
| 585 | } |
| 586 | |
Chuck Lever | d9ef5a8 | 2006-03-20 13:44:13 -0500 | [diff] [blame] | 587 | static void nfs_show_mount_options(struct seq_file *m, struct nfs_server *nfss, int showdefaults) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 588 | { |
| 589 | static struct proc_nfs_info { |
| 590 | int flag; |
| 591 | char *str; |
| 592 | char *nostr; |
| 593 | } nfs_info[] = { |
| 594 | { NFS_MOUNT_SOFT, ",soft", ",hard" }, |
| 595 | { NFS_MOUNT_INTR, ",intr", "" }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 596 | { NFS_MOUNT_NOCTO, ",nocto", "" }, |
| 597 | { NFS_MOUNT_NOAC, ",noac", "" }, |
Chuck Lever | c8bded9 | 2006-03-20 13:44:13 -0500 | [diff] [blame] | 598 | { NFS_MOUNT_NONLM, ",nolock", "" }, |
Andreas Gruenbacher | b7fa055 | 2005-06-22 17:16:27 +0000 | [diff] [blame] | 599 | { NFS_MOUNT_NOACL, ",noacl", "" }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 600 | { 0, NULL, NULL } |
| 601 | }; |
| 602 | struct proc_nfs_info *nfs_infop; |
Trond Myklebust | 3063d8a | 2005-08-25 16:25:57 -0700 | [diff] [blame] | 603 | char buf[12]; |
| 604 | char *proto; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 605 | |
Chuck Lever | c8bded9 | 2006-03-20 13:44:13 -0500 | [diff] [blame] | 606 | seq_printf(m, ",vers=%d", nfss->rpc_ops->version); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 607 | seq_printf(m, ",rsize=%d", nfss->rsize); |
| 608 | seq_printf(m, ",wsize=%d", nfss->wsize); |
Chuck Lever | d9ef5a8 | 2006-03-20 13:44:13 -0500 | [diff] [blame] | 609 | if (nfss->acregmin != 3*HZ || showdefaults) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 610 | seq_printf(m, ",acregmin=%d", nfss->acregmin/HZ); |
Chuck Lever | d9ef5a8 | 2006-03-20 13:44:13 -0500 | [diff] [blame] | 611 | if (nfss->acregmax != 60*HZ || showdefaults) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 612 | seq_printf(m, ",acregmax=%d", nfss->acregmax/HZ); |
Chuck Lever | d9ef5a8 | 2006-03-20 13:44:13 -0500 | [diff] [blame] | 613 | if (nfss->acdirmin != 30*HZ || showdefaults) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 614 | seq_printf(m, ",acdirmin=%d", nfss->acdirmin/HZ); |
Chuck Lever | d9ef5a8 | 2006-03-20 13:44:13 -0500 | [diff] [blame] | 615 | if (nfss->acdirmax != 60*HZ || showdefaults) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 616 | seq_printf(m, ",acdirmax=%d", nfss->acdirmax/HZ); |
| 617 | for (nfs_infop = nfs_info; nfs_infop->flag; nfs_infop++) { |
| 618 | if (nfss->flags & nfs_infop->flag) |
| 619 | seq_puts(m, nfs_infop->str); |
| 620 | else |
| 621 | seq_puts(m, nfs_infop->nostr); |
| 622 | } |
Trond Myklebust | 3063d8a | 2005-08-25 16:25:57 -0700 | [diff] [blame] | 623 | switch (nfss->client->cl_xprt->prot) { |
| 624 | case IPPROTO_TCP: |
| 625 | proto = "tcp"; |
| 626 | break; |
| 627 | case IPPROTO_UDP: |
| 628 | proto = "udp"; |
| 629 | break; |
| 630 | default: |
| 631 | snprintf(buf, sizeof(buf), "%u", nfss->client->cl_xprt->prot); |
| 632 | proto = buf; |
| 633 | } |
| 634 | seq_printf(m, ",proto=%s", proto); |
Chuck Lever | 7a480e2 | 2006-03-20 13:44:12 -0500 | [diff] [blame] | 635 | seq_printf(m, ",timeo=%lu", 10U * nfss->retrans_timeo / HZ); |
| 636 | seq_printf(m, ",retrans=%u", nfss->retrans_count); |
Chuck Lever | d9ef5a8 | 2006-03-20 13:44:13 -0500 | [diff] [blame] | 637 | } |
| 638 | |
| 639 | static int nfs_show_options(struct seq_file *m, struct vfsmount *mnt) |
| 640 | { |
| 641 | struct nfs_server *nfss = NFS_SB(mnt->mnt_sb); |
| 642 | |
| 643 | nfs_show_mount_options(m, nfss, 0); |
| 644 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 645 | seq_puts(m, ",addr="); |
| 646 | seq_escape(m, nfss->hostname, " \t\n\\"); |
Chuck Lever | d9ef5a8 | 2006-03-20 13:44:13 -0500 | [diff] [blame] | 647 | |
| 648 | return 0; |
| 649 | } |
| 650 | |
| 651 | static int nfs_show_stats(struct seq_file *m, struct vfsmount *mnt) |
| 652 | { |
| 653 | int i, cpu; |
| 654 | struct nfs_server *nfss = NFS_SB(mnt->mnt_sb); |
| 655 | struct rpc_auth *auth = nfss->client->cl_auth; |
| 656 | struct nfs_iostats totals = { }; |
| 657 | |
| 658 | seq_printf(m, "statvers=%s", NFS_IOSTAT_VERS); |
| 659 | |
| 660 | /* |
| 661 | * Display all mount option settings |
| 662 | */ |
| 663 | seq_printf(m, "\n\topts:\t"); |
| 664 | seq_puts(m, mnt->mnt_sb->s_flags & MS_RDONLY ? "ro" : "rw"); |
| 665 | seq_puts(m, mnt->mnt_sb->s_flags & MS_SYNCHRONOUS ? ",sync" : ""); |
| 666 | seq_puts(m, mnt->mnt_sb->s_flags & MS_NOATIME ? ",noatime" : ""); |
| 667 | seq_puts(m, mnt->mnt_sb->s_flags & MS_NODIRATIME ? ",nodiratime" : ""); |
| 668 | nfs_show_mount_options(m, nfss, 1); |
| 669 | |
Chuck Lever | 67ec9f4 | 2006-03-20 13:44:15 -0500 | [diff] [blame] | 670 | seq_printf(m, "\n\tage:\t%lu", (jiffies - nfss->mount_time) / HZ); |
| 671 | |
Chuck Lever | d9ef5a8 | 2006-03-20 13:44:13 -0500 | [diff] [blame] | 672 | seq_printf(m, "\n\tcaps:\t"); |
| 673 | seq_printf(m, "caps=0x%x", nfss->caps); |
| 674 | seq_printf(m, ",wtmult=%d", nfss->wtmult); |
| 675 | seq_printf(m, ",dtsize=%d", nfss->dtsize); |
| 676 | seq_printf(m, ",bsize=%d", nfss->bsize); |
| 677 | seq_printf(m, ",namelen=%d", nfss->namelen); |
| 678 | |
| 679 | #ifdef CONFIG_NFS_V4 |
| 680 | if (nfss->rpc_ops->version == 4) { |
| 681 | seq_printf(m, "\n\tnfsv4:\t"); |
| 682 | seq_printf(m, "bm0=0x%x", nfss->attr_bitmask[0]); |
| 683 | seq_printf(m, ",bm1=0x%x", nfss->attr_bitmask[1]); |
| 684 | seq_printf(m, ",acl=0x%x", nfss->acl_bitmask); |
| 685 | } |
| 686 | #endif |
| 687 | |
| 688 | /* |
| 689 | * Display security flavor in effect for this mount |
| 690 | */ |
| 691 | seq_printf(m, "\n\tsec:\tflavor=%d", auth->au_ops->au_flavor); |
| 692 | if (auth->au_flavor) |
| 693 | seq_printf(m, ",pseudoflavor=%d", auth->au_flavor); |
| 694 | |
| 695 | /* |
| 696 | * Display superblock I/O counters |
| 697 | */ |
John Hawkes | b9d9506 | 2006-04-19 13:06:20 -0400 | [diff] [blame] | 698 | for_each_possible_cpu(cpu) { |
Chuck Lever | d9ef5a8 | 2006-03-20 13:44:13 -0500 | [diff] [blame] | 699 | struct nfs_iostats *stats; |
| 700 | |
Chuck Lever | d9ef5a8 | 2006-03-20 13:44:13 -0500 | [diff] [blame] | 701 | preempt_disable(); |
| 702 | stats = per_cpu_ptr(nfss->io_stats, cpu); |
| 703 | |
| 704 | for (i = 0; i < __NFSIOS_COUNTSMAX; i++) |
| 705 | totals.events[i] += stats->events[i]; |
| 706 | for (i = 0; i < __NFSIOS_BYTESMAX; i++) |
| 707 | totals.bytes[i] += stats->bytes[i]; |
| 708 | |
| 709 | preempt_enable(); |
| 710 | } |
| 711 | |
| 712 | seq_printf(m, "\n\tevents:\t"); |
| 713 | for (i = 0; i < __NFSIOS_COUNTSMAX; i++) |
| 714 | seq_printf(m, "%lu ", totals.events[i]); |
| 715 | seq_printf(m, "\n\tbytes:\t"); |
| 716 | for (i = 0; i < __NFSIOS_BYTESMAX; i++) |
| 717 | seq_printf(m, "%Lu ", totals.bytes[i]); |
Chuck Lever | 4ece3a2 | 2006-03-20 13:44:22 -0500 | [diff] [blame] | 718 | seq_printf(m, "\n"); |
| 719 | |
| 720 | rpc_print_iostats(m, nfss->client); |
Chuck Lever | d9ef5a8 | 2006-03-20 13:44:13 -0500 | [diff] [blame] | 721 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 722 | return 0; |
| 723 | } |
| 724 | |
Trond Myklebust | 29884df | 2005-12-13 16:13:54 -0500 | [diff] [blame] | 725 | /** |
| 726 | * nfs_sync_mapping - helper to flush all mmapped dirty data to disk |
| 727 | */ |
| 728 | int nfs_sync_mapping(struct address_space *mapping) |
| 729 | { |
| 730 | int ret; |
| 731 | |
| 732 | if (mapping->nrpages == 0) |
| 733 | return 0; |
| 734 | unmap_mapping_range(mapping, 0, 0, 0); |
OGAWA Hirofumi | 28fd129 | 2006-01-08 01:02:14 -0800 | [diff] [blame] | 735 | ret = filemap_write_and_wait(mapping); |
Trond Myklebust | 29884df | 2005-12-13 16:13:54 -0500 | [diff] [blame] | 736 | if (ret != 0) |
| 737 | goto out; |
| 738 | ret = nfs_wb_all(mapping->host); |
| 739 | out: |
| 740 | return ret; |
| 741 | } |
| 742 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 743 | /* |
| 744 | * Invalidate the local caches |
| 745 | */ |
Trond Myklebust | b37b03b | 2005-11-25 17:10:06 -0500 | [diff] [blame] | 746 | static void nfs_zap_caches_locked(struct inode *inode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 747 | { |
| 748 | struct nfs_inode *nfsi = NFS_I(inode); |
| 749 | int mode = inode->i_mode; |
| 750 | |
Chuck Lever | 91d5b47 | 2006-03-20 13:44:14 -0500 | [diff] [blame] | 751 | nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE); |
| 752 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 753 | NFS_ATTRTIMEO(inode) = NFS_MINATTRTIMEO(inode); |
| 754 | NFS_ATTRTIMEO_UPDATE(inode) = jiffies; |
| 755 | |
| 756 | memset(NFS_COOKIEVERF(inode), 0, sizeof(NFS_COOKIEVERF(inode))); |
| 757 | if (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode)) |
Chuck Lever | 5529680 | 2005-08-18 11:24:09 -0700 | [diff] [blame] | 758 | nfsi->cache_validity |= 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] | 759 | else |
Chuck Lever | 5529680 | 2005-08-18 11:24:09 -0700 | [diff] [blame] | 760 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL|NFS_INO_REVAL_PAGECACHE; |
Trond Myklebust | b37b03b | 2005-11-25 17:10:06 -0500 | [diff] [blame] | 761 | } |
Chuck Lever | dc59250 | 2005-08-18 11:24:12 -0700 | [diff] [blame] | 762 | |
Trond Myklebust | b37b03b | 2005-11-25 17:10:06 -0500 | [diff] [blame] | 763 | void nfs_zap_caches(struct inode *inode) |
| 764 | { |
| 765 | spin_lock(&inode->i_lock); |
| 766 | nfs_zap_caches_locked(inode); |
Chuck Lever | dc59250 | 2005-08-18 11:24:12 -0700 | [diff] [blame] | 767 | spin_unlock(&inode->i_lock); |
Trond Myklebust | ada70d9 | 2005-06-22 17:16:22 +0000 | [diff] [blame] | 768 | } |
| 769 | |
| 770 | static void nfs_zap_acl_cache(struct inode *inode) |
| 771 | { |
| 772 | void (*clear_acl_cache)(struct inode *); |
| 773 | |
| 774 | clear_acl_cache = NFS_PROTO(inode)->clear_acl_cache; |
| 775 | if (clear_acl_cache != NULL) |
| 776 | clear_acl_cache(inode); |
Chuck Lever | dc59250 | 2005-08-18 11:24:12 -0700 | [diff] [blame] | 777 | spin_lock(&inode->i_lock); |
Chuck Lever | 5529680 | 2005-08-18 11:24:09 -0700 | [diff] [blame] | 778 | NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_ACL; |
Chuck Lever | dc59250 | 2005-08-18 11:24:12 -0700 | [diff] [blame] | 779 | spin_unlock(&inode->i_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 780 | } |
| 781 | |
| 782 | /* |
Trond Myklebust | b37b03b | 2005-11-25 17:10:06 -0500 | [diff] [blame] | 783 | * Invalidate, but do not unhash, the inode. |
| 784 | * NB: must be called with inode->i_lock held! |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 785 | */ |
Trond Myklebust | b37b03b | 2005-11-25 17:10:06 -0500 | [diff] [blame] | 786 | static void nfs_invalidate_inode(struct inode *inode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 787 | { |
Trond Myklebust | b37b03b | 2005-11-25 17:10:06 -0500 | [diff] [blame] | 788 | set_bit(NFS_INO_STALE, &NFS_FLAGS(inode)); |
| 789 | nfs_zap_caches_locked(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 790 | } |
| 791 | |
| 792 | struct nfs_find_desc { |
| 793 | struct nfs_fh *fh; |
| 794 | struct nfs_fattr *fattr; |
| 795 | }; |
| 796 | |
| 797 | /* |
| 798 | * In NFSv3 we can have 64bit inode numbers. In order to support |
| 799 | * this, and re-exported directories (also seen in NFSv2) |
| 800 | * we are forced to allow 2 different inodes to have the same |
| 801 | * i_ino. |
| 802 | */ |
| 803 | static int |
| 804 | nfs_find_actor(struct inode *inode, void *opaque) |
| 805 | { |
| 806 | struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque; |
| 807 | struct nfs_fh *fh = desc->fh; |
| 808 | struct nfs_fattr *fattr = desc->fattr; |
| 809 | |
| 810 | if (NFS_FILEID(inode) != fattr->fileid) |
| 811 | return 0; |
| 812 | if (nfs_compare_fh(NFS_FH(inode), fh)) |
| 813 | return 0; |
| 814 | if (is_bad_inode(inode) || NFS_STALE(inode)) |
| 815 | return 0; |
| 816 | return 1; |
| 817 | } |
| 818 | |
| 819 | static int |
| 820 | nfs_init_locked(struct inode *inode, void *opaque) |
| 821 | { |
| 822 | struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque; |
| 823 | struct nfs_fattr *fattr = desc->fattr; |
| 824 | |
| 825 | NFS_FILEID(inode) = fattr->fileid; |
| 826 | nfs_copy_fh(NFS_FH(inode), desc->fh); |
| 827 | return 0; |
| 828 | } |
| 829 | |
| 830 | /* Don't use READDIRPLUS on directories that we believe are too large */ |
| 831 | #define NFS_LIMIT_READDIRPLUS (8*PAGE_SIZE) |
| 832 | |
| 833 | /* |
| 834 | * This is our front-end to iget that looks up inodes by file handle |
| 835 | * instead of inode number. |
| 836 | */ |
| 837 | struct inode * |
| 838 | nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr) |
| 839 | { |
| 840 | struct nfs_find_desc desc = { |
| 841 | .fh = fh, |
| 842 | .fattr = fattr |
| 843 | }; |
Trond Myklebust | 03f28e3 | 2006-03-20 13:44:48 -0500 | [diff] [blame] | 844 | struct inode *inode = ERR_PTR(-ENOENT); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 845 | unsigned long hash; |
| 846 | |
| 847 | if ((fattr->valid & NFS_ATTR_FATTR) == 0) |
| 848 | goto out_no_inode; |
| 849 | |
| 850 | if (!fattr->nlink) { |
| 851 | printk("NFS: Buggy server - nlink == 0!\n"); |
| 852 | goto out_no_inode; |
| 853 | } |
| 854 | |
| 855 | hash = nfs_fattr_to_ino_t(fattr); |
| 856 | |
Trond Myklebust | 03f28e3 | 2006-03-20 13:44:48 -0500 | [diff] [blame] | 857 | inode = iget5_locked(sb, hash, nfs_find_actor, nfs_init_locked, &desc); |
| 858 | if (inode == NULL) { |
| 859 | inode = ERR_PTR(-ENOMEM); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 860 | goto out_no_inode; |
Trond Myklebust | 03f28e3 | 2006-03-20 13:44:48 -0500 | [diff] [blame] | 861 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 862 | |
| 863 | if (inode->i_state & I_NEW) { |
| 864 | struct nfs_inode *nfsi = NFS_I(inode); |
| 865 | |
| 866 | /* We set i_ino for the few things that still rely on it, |
| 867 | * such as stat(2) */ |
| 868 | inode->i_ino = hash; |
| 869 | |
| 870 | /* We can't support update_atime(), since the server will reset it */ |
| 871 | inode->i_flags |= S_NOATIME|S_NOCMTIME; |
| 872 | inode->i_mode = fattr->mode; |
| 873 | /* Why so? Because we want revalidate for devices/FIFOs, and |
| 874 | * that's precisely what we have in nfs_file_inode_operations. |
| 875 | */ |
J. Bruce Fields | 92cfc62 | 2005-06-22 17:16:22 +0000 | [diff] [blame] | 876 | inode->i_op = NFS_SB(sb)->rpc_ops->file_inode_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 877 | if (S_ISREG(inode->i_mode)) { |
| 878 | inode->i_fop = &nfs_file_operations; |
| 879 | inode->i_data.a_ops = &nfs_file_aops; |
| 880 | inode->i_data.backing_dev_info = &NFS_SB(sb)->backing_dev_info; |
| 881 | } else if (S_ISDIR(inode->i_mode)) { |
| 882 | inode->i_op = NFS_SB(sb)->rpc_ops->dir_inode_ops; |
| 883 | inode->i_fop = &nfs_dir_operations; |
| 884 | if (nfs_server_capable(inode, NFS_CAP_READDIRPLUS) |
| 885 | && fattr->size <= NFS_LIMIT_READDIRPLUS) |
Chuck Lever | 412d582 | 2005-08-18 11:24:11 -0700 | [diff] [blame] | 886 | set_bit(NFS_INO_ADVISE_RDPLUS, &NFS_FLAGS(inode)); |
Trond Myklebust | 55a9759 | 2006-06-09 09:34:19 -0400 | [diff] [blame] | 887 | /* Deal with crossing mountpoints */ |
| 888 | if (!nfs_fsid_equal(&NFS_SB(sb)->fsid, &fattr->fsid)) { |
| 889 | inode->i_op = &nfs_mountpoint_inode_operations; |
| 890 | inode->i_fop = NULL; |
| 891 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 892 | } else if (S_ISLNK(inode->i_mode)) |
| 893 | inode->i_op = &nfs_symlink_inode_operations; |
| 894 | else |
| 895 | init_special_inode(inode, inode->i_mode, fattr->rdev); |
| 896 | |
Trond Myklebust | 3380114 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 897 | nfsi->read_cache_jiffies = fattr->time_start; |
| 898 | nfsi->last_updated = jiffies; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 899 | inode->i_atime = fattr->atime; |
| 900 | inode->i_mtime = fattr->mtime; |
| 901 | inode->i_ctime = fattr->ctime; |
| 902 | if (fattr->valid & NFS_ATTR_FATTR_V4) |
| 903 | nfsi->change_attr = fattr->change_attr; |
| 904 | inode->i_size = nfs_size_to_loff_t(fattr->size); |
| 905 | inode->i_nlink = fattr->nlink; |
| 906 | inode->i_uid = fattr->uid; |
| 907 | inode->i_gid = fattr->gid; |
| 908 | if (fattr->valid & (NFS_ATTR_FATTR_V3 | NFS_ATTR_FATTR_V4)) { |
| 909 | /* |
| 910 | * report the blocks in 512byte units |
| 911 | */ |
| 912 | inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used); |
| 913 | inode->i_blksize = inode->i_sb->s_blocksize; |
| 914 | } else { |
| 915 | inode->i_blocks = fattr->du.nfs2.blocks; |
| 916 | inode->i_blksize = fattr->du.nfs2.blocksize; |
| 917 | } |
| 918 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); |
| 919 | nfsi->attrtimeo_timestamp = jiffies; |
| 920 | memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf)); |
| 921 | nfsi->cache_access.cred = NULL; |
| 922 | |
| 923 | unlock_new_inode(inode); |
| 924 | } else |
| 925 | nfs_refresh_inode(inode, fattr); |
| 926 | dprintk("NFS: nfs_fhget(%s/%Ld ct=%d)\n", |
| 927 | inode->i_sb->s_id, |
| 928 | (long long)NFS_FILEID(inode), |
| 929 | atomic_read(&inode->i_count)); |
| 930 | |
| 931 | out: |
| 932 | return inode; |
| 933 | |
| 934 | out_no_inode: |
Trond Myklebust | 03f28e3 | 2006-03-20 13:44:48 -0500 | [diff] [blame] | 935 | dprintk("nfs_fhget: iget failed with error %ld\n", PTR_ERR(inode)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 936 | goto out; |
| 937 | } |
| 938 | |
| 939 | #define NFS_VALID_ATTRS (ATTR_MODE|ATTR_UID|ATTR_GID|ATTR_SIZE|ATTR_ATIME|ATTR_ATIME_SET|ATTR_MTIME|ATTR_MTIME_SET) |
| 940 | |
| 941 | int |
| 942 | nfs_setattr(struct dentry *dentry, struct iattr *attr) |
| 943 | { |
| 944 | struct inode *inode = dentry->d_inode; |
| 945 | struct nfs_fattr fattr; |
| 946 | int error; |
| 947 | |
Chuck Lever | 91d5b47 | 2006-03-20 13:44:14 -0500 | [diff] [blame] | 948 | nfs_inc_stats(inode, NFSIOS_VFSSETATTR); |
| 949 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 950 | if (attr->ia_valid & ATTR_SIZE) { |
| 951 | if (!S_ISREG(inode->i_mode) || attr->ia_size == i_size_read(inode)) |
| 952 | attr->ia_valid &= ~ATTR_SIZE; |
| 953 | } |
| 954 | |
| 955 | /* Optimization: if the end result is no change, don't RPC */ |
| 956 | attr->ia_valid &= NFS_VALID_ATTRS; |
| 957 | if (attr->ia_valid == 0) |
| 958 | return 0; |
| 959 | |
| 960 | lock_kernel(); |
| 961 | nfs_begin_data_update(inode); |
Trond Myklebust | 755c1e2 | 2006-03-20 13:44:06 -0500 | [diff] [blame] | 962 | /* Write all dirty data */ |
| 963 | filemap_write_and_wait(inode->i_mapping); |
| 964 | nfs_wb_all(inode); |
Trond Myklebust | 642ac54 | 2005-10-18 14:20:19 -0700 | [diff] [blame] | 965 | /* |
| 966 | * Return any delegations if we're going to change ACLs |
| 967 | */ |
| 968 | if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) |
| 969 | nfs_inode_return_delegation(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 970 | error = NFS_PROTO(inode)->setattr(dentry, &fattr, attr); |
Trond Myklebust | 65e4308 | 2005-08-16 11:49:44 -0400 | [diff] [blame] | 971 | if (error == 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 972 | nfs_refresh_inode(inode, &fattr); |
Trond Myklebust | 65e4308 | 2005-08-16 11:49:44 -0400 | [diff] [blame] | 973 | nfs_end_data_update(inode); |
| 974 | unlock_kernel(); |
| 975 | return error; |
| 976 | } |
| 977 | |
| 978 | /** |
| 979 | * nfs_setattr_update_inode - Update inode metadata after a setattr call. |
| 980 | * @inode: pointer to struct inode |
| 981 | * @attr: pointer to struct iattr |
| 982 | * |
| 983 | * Note: we do this in the *proc.c in order to ensure that |
| 984 | * it works for things like exclusive creates too. |
| 985 | */ |
| 986 | void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr) |
| 987 | { |
| 988 | if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 989 | if ((attr->ia_valid & ATTR_MODE) != 0) { |
Trond Myklebust | 65e4308 | 2005-08-16 11:49:44 -0400 | [diff] [blame] | 990 | int mode = attr->ia_mode & S_IALLUGO; |
| 991 | mode |= inode->i_mode & ~S_IALLUGO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 992 | inode->i_mode = mode; |
| 993 | } |
| 994 | if ((attr->ia_valid & ATTR_UID) != 0) |
| 995 | inode->i_uid = attr->ia_uid; |
| 996 | if ((attr->ia_valid & ATTR_GID) != 0) |
| 997 | inode->i_gid = attr->ia_gid; |
Chuck Lever | dc59250 | 2005-08-18 11:24:12 -0700 | [diff] [blame] | 998 | spin_lock(&inode->i_lock); |
Chuck Lever | 5529680 | 2005-08-18 11:24:09 -0700 | [diff] [blame] | 999 | NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
Chuck Lever | dc59250 | 2005-08-18 11:24:12 -0700 | [diff] [blame] | 1000 | spin_unlock(&inode->i_lock); |
Trond Myklebust | 65e4308 | 2005-08-16 11:49:44 -0400 | [diff] [blame] | 1001 | } |
| 1002 | if ((attr->ia_valid & ATTR_SIZE) != 0) { |
Chuck Lever | 91d5b47 | 2006-03-20 13:44:14 -0500 | [diff] [blame] | 1003 | nfs_inc_stats(inode, NFSIOS_SETATTRTRUNC); |
Trond Myklebust | 65e4308 | 2005-08-16 11:49:44 -0400 | [diff] [blame] | 1004 | inode->i_size = attr->ia_size; |
| 1005 | vmtruncate(inode, attr->ia_size); |
| 1006 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1007 | } |
| 1008 | |
Chuck Lever | 412d582 | 2005-08-18 11:24:11 -0700 | [diff] [blame] | 1009 | static int nfs_wait_schedule(void *word) |
| 1010 | { |
| 1011 | if (signal_pending(current)) |
| 1012 | return -ERESTARTSYS; |
| 1013 | schedule(); |
| 1014 | return 0; |
| 1015 | } |
| 1016 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1017 | /* |
| 1018 | * Wait for the inode to get unlocked. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1019 | */ |
Chuck Lever | 412d582 | 2005-08-18 11:24:11 -0700 | [diff] [blame] | 1020 | static int nfs_wait_on_inode(struct inode *inode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1021 | { |
| 1022 | struct rpc_clnt *clnt = NFS_CLIENT(inode); |
| 1023 | struct nfs_inode *nfsi = NFS_I(inode); |
Chuck Lever | 412d582 | 2005-08-18 11:24:11 -0700 | [diff] [blame] | 1024 | sigset_t oldmask; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1025 | int error; |
Chuck Lever | 412d582 | 2005-08-18 11:24:11 -0700 | [diff] [blame] | 1026 | |
Chuck Lever | 412d582 | 2005-08-18 11:24:11 -0700 | [diff] [blame] | 1027 | rpc_clnt_sigmask(clnt, &oldmask); |
| 1028 | error = wait_on_bit_lock(&nfsi->flags, NFS_INO_REVALIDATING, |
| 1029 | nfs_wait_schedule, TASK_INTERRUPTIBLE); |
| 1030 | rpc_clnt_sigunmask(clnt, &oldmask); |
Chuck Lever | 412d582 | 2005-08-18 11:24:11 -0700 | [diff] [blame] | 1031 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1032 | return error; |
| 1033 | } |
| 1034 | |
Chuck Lever | 412d582 | 2005-08-18 11:24:11 -0700 | [diff] [blame] | 1035 | static void nfs_wake_up_inode(struct inode *inode) |
| 1036 | { |
| 1037 | struct nfs_inode *nfsi = NFS_I(inode); |
| 1038 | |
| 1039 | clear_bit(NFS_INO_REVALIDATING, &nfsi->flags); |
| 1040 | smp_mb__after_clear_bit(); |
| 1041 | wake_up_bit(&nfsi->flags, NFS_INO_REVALIDATING); |
| 1042 | } |
| 1043 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1044 | int nfs_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat) |
| 1045 | { |
| 1046 | struct inode *inode = dentry->d_inode; |
Chuck Lever | 5529680 | 2005-08-18 11:24:09 -0700 | [diff] [blame] | 1047 | int need_atime = NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATIME; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1048 | int err; |
| 1049 | |
Trond Myklebust | 70b9ecb | 2006-01-03 09:55:34 +0100 | [diff] [blame] | 1050 | /* Flush out writes to the server in order to update c/mtime */ |
Trond Myklebust | c42de9d | 2006-03-20 13:44:51 -0500 | [diff] [blame] | 1051 | nfs_sync_inode_wait(inode, 0, 0, FLUSH_NOCOMMIT); |
Christoph Hellwig | fc33a7b | 2006-01-09 20:52:17 -0800 | [diff] [blame] | 1052 | |
| 1053 | /* |
| 1054 | * We may force a getattr if the user cares about atime. |
| 1055 | * |
| 1056 | * Note that we only have to check the vfsmount flags here: |
| 1057 | * - NFS always sets S_NOATIME by so checking it would give a |
| 1058 | * bogus result |
| 1059 | * - NFS never sets MS_NOATIME or MS_NODIRATIME so there is |
| 1060 | * no point in checking those. |
| 1061 | */ |
| 1062 | if ((mnt->mnt_flags & MNT_NOATIME) || |
| 1063 | ((mnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1064 | need_atime = 0; |
Christoph Hellwig | fc33a7b | 2006-01-09 20:52:17 -0800 | [diff] [blame] | 1065 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1066 | if (need_atime) |
| 1067 | err = __nfs_revalidate_inode(NFS_SERVER(inode), inode); |
| 1068 | else |
| 1069 | err = nfs_revalidate_inode(NFS_SERVER(inode), inode); |
| 1070 | if (!err) |
| 1071 | generic_fillattr(inode, stat); |
| 1072 | return err; |
| 1073 | } |
| 1074 | |
Trond Myklebust | b92dccf | 2006-03-20 13:44:03 -0500 | [diff] [blame] | 1075 | static struct nfs_open_context *alloc_nfs_open_context(struct vfsmount *mnt, struct dentry *dentry, struct rpc_cred *cred) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1076 | { |
| 1077 | struct nfs_open_context *ctx; |
| 1078 | |
| 1079 | ctx = (struct nfs_open_context *)kmalloc(sizeof(*ctx), GFP_KERNEL); |
| 1080 | if (ctx != NULL) { |
| 1081 | atomic_set(&ctx->count, 1); |
| 1082 | ctx->dentry = dget(dentry); |
Trond Myklebust | b92dccf | 2006-03-20 13:44:03 -0500 | [diff] [blame] | 1083 | ctx->vfsmnt = mntget(mnt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1084 | ctx->cred = get_rpccred(cred); |
| 1085 | ctx->state = NULL; |
| 1086 | ctx->lockowner = current->files; |
| 1087 | ctx->error = 0; |
Olivier Galibert | 00a9264 | 2005-06-22 17:16:29 +0000 | [diff] [blame] | 1088 | ctx->dir_cookie = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1089 | } |
| 1090 | return ctx; |
| 1091 | } |
| 1092 | |
| 1093 | struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx) |
| 1094 | { |
| 1095 | if (ctx != NULL) |
| 1096 | atomic_inc(&ctx->count); |
| 1097 | return ctx; |
| 1098 | } |
| 1099 | |
| 1100 | void put_nfs_open_context(struct nfs_open_context *ctx) |
| 1101 | { |
| 1102 | if (atomic_dec_and_test(&ctx->count)) { |
| 1103 | if (!list_empty(&ctx->list)) { |
| 1104 | struct inode *inode = ctx->dentry->d_inode; |
| 1105 | spin_lock(&inode->i_lock); |
| 1106 | list_del(&ctx->list); |
| 1107 | spin_unlock(&inode->i_lock); |
| 1108 | } |
| 1109 | if (ctx->state != NULL) |
| 1110 | nfs4_close_state(ctx->state, ctx->mode); |
| 1111 | if (ctx->cred != NULL) |
| 1112 | put_rpccred(ctx->cred); |
| 1113 | dput(ctx->dentry); |
Trond Myklebust | b92dccf | 2006-03-20 13:44:03 -0500 | [diff] [blame] | 1114 | mntput(ctx->vfsmnt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1115 | kfree(ctx); |
| 1116 | } |
| 1117 | } |
| 1118 | |
| 1119 | /* |
| 1120 | * Ensure that mmap has a recent RPC credential for use when writing out |
| 1121 | * shared pages |
| 1122 | */ |
Trond Myklebust | b92dccf | 2006-03-20 13:44:03 -0500 | [diff] [blame] | 1123 | static void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1124 | { |
| 1125 | struct inode *inode = filp->f_dentry->d_inode; |
| 1126 | struct nfs_inode *nfsi = NFS_I(inode); |
| 1127 | |
| 1128 | filp->private_data = get_nfs_open_context(ctx); |
| 1129 | spin_lock(&inode->i_lock); |
| 1130 | list_add(&ctx->list, &nfsi->open_files); |
| 1131 | spin_unlock(&inode->i_lock); |
| 1132 | } |
| 1133 | |
Trond Myklebust | d530838 | 2005-11-04 15:33:38 -0500 | [diff] [blame] | 1134 | /* |
| 1135 | * Given an inode, search for an open context with the desired characteristics |
| 1136 | */ |
| 1137 | struct nfs_open_context *nfs_find_open_context(struct inode *inode, struct rpc_cred *cred, int mode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1138 | { |
| 1139 | struct nfs_inode *nfsi = NFS_I(inode); |
| 1140 | struct nfs_open_context *pos, *ctx = NULL; |
| 1141 | |
| 1142 | spin_lock(&inode->i_lock); |
| 1143 | list_for_each_entry(pos, &nfsi->open_files, list) { |
Trond Myklebust | d530838 | 2005-11-04 15:33:38 -0500 | [diff] [blame] | 1144 | if (cred != NULL && pos->cred != cred) |
| 1145 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1146 | if ((pos->mode & mode) == mode) { |
| 1147 | ctx = get_nfs_open_context(pos); |
| 1148 | break; |
| 1149 | } |
| 1150 | } |
| 1151 | spin_unlock(&inode->i_lock); |
| 1152 | return ctx; |
| 1153 | } |
| 1154 | |
Trond Myklebust | b92dccf | 2006-03-20 13:44:03 -0500 | [diff] [blame] | 1155 | static void nfs_file_clear_open_context(struct file *filp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1156 | { |
| 1157 | struct inode *inode = filp->f_dentry->d_inode; |
| 1158 | struct nfs_open_context *ctx = (struct nfs_open_context *)filp->private_data; |
| 1159 | |
| 1160 | if (ctx) { |
| 1161 | filp->private_data = NULL; |
| 1162 | spin_lock(&inode->i_lock); |
| 1163 | list_move_tail(&ctx->list, &NFS_I(inode)->open_files); |
| 1164 | spin_unlock(&inode->i_lock); |
| 1165 | put_nfs_open_context(ctx); |
| 1166 | } |
| 1167 | } |
| 1168 | |
| 1169 | /* |
| 1170 | * These allocate and release file read/write context information. |
| 1171 | */ |
| 1172 | int nfs_open(struct inode *inode, struct file *filp) |
| 1173 | { |
| 1174 | struct nfs_open_context *ctx; |
| 1175 | struct rpc_cred *cred; |
| 1176 | |
| 1177 | cred = rpcauth_lookupcred(NFS_CLIENT(inode)->cl_auth, 0); |
| 1178 | if (IS_ERR(cred)) |
| 1179 | return PTR_ERR(cred); |
Trond Myklebust | b92dccf | 2006-03-20 13:44:03 -0500 | [diff] [blame] | 1180 | ctx = alloc_nfs_open_context(filp->f_vfsmnt, filp->f_dentry, cred); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1181 | put_rpccred(cred); |
| 1182 | if (ctx == NULL) |
| 1183 | return -ENOMEM; |
| 1184 | ctx->mode = filp->f_mode; |
| 1185 | nfs_file_set_open_context(filp, ctx); |
| 1186 | put_nfs_open_context(ctx); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1187 | return 0; |
| 1188 | } |
| 1189 | |
| 1190 | int nfs_release(struct inode *inode, struct file *filp) |
| 1191 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1192 | nfs_file_clear_open_context(filp); |
| 1193 | return 0; |
| 1194 | } |
| 1195 | |
| 1196 | /* |
| 1197 | * This function is called whenever some part of NFS notices that |
| 1198 | * the cached attributes have to be refreshed. |
| 1199 | */ |
| 1200 | int |
| 1201 | __nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) |
| 1202 | { |
| 1203 | int status = -ESTALE; |
| 1204 | struct nfs_fattr fattr; |
| 1205 | struct nfs_inode *nfsi = NFS_I(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1206 | |
| 1207 | dfprintk(PAGECACHE, "NFS: revalidating (%s/%Ld)\n", |
| 1208 | inode->i_sb->s_id, (long long)NFS_FILEID(inode)); |
| 1209 | |
Trond Myklebust | 1842bfb | 2006-05-25 01:41:01 -0400 | [diff] [blame] | 1210 | nfs_inc_stats(inode, NFSIOS_INODEREVALIDATE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1211 | lock_kernel(); |
| 1212 | if (!inode || is_bad_inode(inode)) |
| 1213 | goto out_nowait; |
| 1214 | if (NFS_STALE(inode)) |
| 1215 | goto out_nowait; |
| 1216 | |
Chuck Lever | 412d582 | 2005-08-18 11:24:11 -0700 | [diff] [blame] | 1217 | status = nfs_wait_on_inode(inode); |
| 1218 | if (status < 0) |
| 1219 | goto out; |
| 1220 | if (NFS_STALE(inode)) { |
| 1221 | status = -ESTALE; |
| 1222 | /* Do we trust the cached ESTALE? */ |
| 1223 | if (NFS_ATTRTIMEO(inode) != 0) { |
Trond Myklebust | 44b1187 | 2006-05-25 01:40:59 -0400 | [diff] [blame] | 1224 | if (nfsi->cache_validity & (NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ATIME)) { |
Chuck Lever | 412d582 | 2005-08-18 11:24:11 -0700 | [diff] [blame] | 1225 | /* no */ |
| 1226 | } else |
| 1227 | goto out; |
| 1228 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1229 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1230 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1231 | status = NFS_PROTO(inode)->getattr(server, NFS_FH(inode), &fattr); |
| 1232 | if (status != 0) { |
| 1233 | dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) getattr failed, error=%d\n", |
| 1234 | inode->i_sb->s_id, |
| 1235 | (long long)NFS_FILEID(inode), status); |
| 1236 | if (status == -ESTALE) { |
| 1237 | nfs_zap_caches(inode); |
| 1238 | if (!S_ISDIR(inode->i_mode)) |
Chuck Lever | 412d582 | 2005-08-18 11:24:11 -0700 | [diff] [blame] | 1239 | set_bit(NFS_INO_STALE, &NFS_FLAGS(inode)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1240 | } |
| 1241 | goto out; |
| 1242 | } |
| 1243 | |
Trond Myklebust | 3380114 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 1244 | spin_lock(&inode->i_lock); |
Trond Myklebust | 24aa1fe | 2005-12-03 15:20:07 -0500 | [diff] [blame] | 1245 | status = nfs_update_inode(inode, &fattr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1246 | if (status) { |
Trond Myklebust | 3380114 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 1247 | spin_unlock(&inode->i_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1248 | dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) refresh failed, error=%d\n", |
| 1249 | inode->i_sb->s_id, |
| 1250 | (long long)NFS_FILEID(inode), status); |
| 1251 | goto out; |
| 1252 | } |
Chuck Lever | dc59250 | 2005-08-18 11:24:12 -0700 | [diff] [blame] | 1253 | spin_unlock(&inode->i_lock); |
Chuck Lever | 5529680 | 2005-08-18 11:24:09 -0700 | [diff] [blame] | 1254 | |
Trond Myklebust | 24aa1fe | 2005-12-03 15:20:07 -0500 | [diff] [blame] | 1255 | if (nfsi->cache_validity & NFS_INO_INVALID_ACL) |
Trond Myklebust | ada70d9 | 2005-06-22 17:16:22 +0000 | [diff] [blame] | 1256 | nfs_zap_acl_cache(inode); |
Chuck Lever | 5529680 | 2005-08-18 11:24:09 -0700 | [diff] [blame] | 1257 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1258 | dfprintk(PAGECACHE, "NFS: (%s/%Ld) revalidation complete\n", |
| 1259 | inode->i_sb->s_id, |
| 1260 | (long long)NFS_FILEID(inode)); |
| 1261 | |
Chuck Lever | 412d582 | 2005-08-18 11:24:11 -0700 | [diff] [blame] | 1262 | out: |
| 1263 | nfs_wake_up_inode(inode); |
| 1264 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1265 | out_nowait: |
| 1266 | unlock_kernel(); |
| 1267 | return status; |
| 1268 | } |
| 1269 | |
| 1270 | int nfs_attribute_timeout(struct inode *inode) |
| 1271 | { |
| 1272 | struct nfs_inode *nfsi = NFS_I(inode); |
| 1273 | |
| 1274 | if (nfs_have_delegation(inode, FMODE_READ)) |
| 1275 | return 0; |
| 1276 | return time_after(jiffies, nfsi->read_cache_jiffies+nfsi->attrtimeo); |
| 1277 | } |
| 1278 | |
| 1279 | /** |
| 1280 | * nfs_revalidate_inode - Revalidate the inode attributes |
| 1281 | * @server - pointer to nfs_server struct |
| 1282 | * @inode - pointer to inode struct |
| 1283 | * |
| 1284 | * Updates inode attribute information by retrieving the data from the server. |
| 1285 | */ |
| 1286 | int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) |
| 1287 | { |
Trond Myklebust | 44b1187 | 2006-05-25 01:40:59 -0400 | [diff] [blame] | 1288 | if (!(NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATTR) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1289 | && !nfs_attribute_timeout(inode)) |
| 1290 | return NFS_STALE(inode) ? -ESTALE : 0; |
| 1291 | return __nfs_revalidate_inode(server, inode); |
| 1292 | } |
| 1293 | |
| 1294 | /** |
Trond Myklebust | 7d52e86 | 2005-06-22 17:16:30 +0000 | [diff] [blame] | 1295 | * nfs_revalidate_mapping - Revalidate the pagecache |
| 1296 | * @inode - pointer to host inode |
| 1297 | * @mapping - pointer to mapping |
| 1298 | */ |
Trond Myklebust | 44b1187 | 2006-05-25 01:40:59 -0400 | [diff] [blame] | 1299 | int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping) |
Trond Myklebust | 7d52e86 | 2005-06-22 17:16:30 +0000 | [diff] [blame] | 1300 | { |
| 1301 | struct nfs_inode *nfsi = NFS_I(inode); |
Trond Myklebust | 44b1187 | 2006-05-25 01:40:59 -0400 | [diff] [blame] | 1302 | int ret = 0; |
| 1303 | |
| 1304 | if (NFS_STALE(inode)) |
| 1305 | ret = -ESTALE; |
| 1306 | if ((nfsi->cache_validity & NFS_INO_REVAL_PAGECACHE) |
| 1307 | || nfs_attribute_timeout(inode)) |
| 1308 | ret = __nfs_revalidate_inode(NFS_SERVER(inode), inode); |
Trond Myklebust | 7d52e86 | 2005-06-22 17:16:30 +0000 | [diff] [blame] | 1309 | |
Chuck Lever | 5529680 | 2005-08-18 11:24:09 -0700 | [diff] [blame] | 1310 | if (nfsi->cache_validity & NFS_INO_INVALID_DATA) { |
Chuck Lever | 91d5b47 | 2006-03-20 13:44:14 -0500 | [diff] [blame] | 1311 | nfs_inc_stats(inode, NFSIOS_DATAINVALIDATE); |
Trond Myklebust | 29884df | 2005-12-13 16:13:54 -0500 | [diff] [blame] | 1312 | if (S_ISREG(inode->i_mode)) |
| 1313 | nfs_sync_mapping(mapping); |
Trond Myklebust | 7d52e86 | 2005-06-22 17:16:30 +0000 | [diff] [blame] | 1314 | invalidate_inode_pages2(mapping); |
Chuck Lever | dc59250 | 2005-08-18 11:24:12 -0700 | [diff] [blame] | 1315 | |
| 1316 | spin_lock(&inode->i_lock); |
Chuck Lever | 5529680 | 2005-08-18 11:24:09 -0700 | [diff] [blame] | 1317 | nfsi->cache_validity &= ~NFS_INO_INVALID_DATA; |
Trond Myklebust | 7d52e86 | 2005-06-22 17:16:30 +0000 | [diff] [blame] | 1318 | if (S_ISDIR(inode->i_mode)) { |
| 1319 | memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf)); |
| 1320 | /* This ensures we revalidate child dentries */ |
Trond Myklebust | 913a70f | 2005-10-27 22:12:38 -0400 | [diff] [blame] | 1321 | nfsi->cache_change_attribute = jiffies; |
Trond Myklebust | 7d52e86 | 2005-06-22 17:16:30 +0000 | [diff] [blame] | 1322 | } |
Chuck Lever | dc59250 | 2005-08-18 11:24:12 -0700 | [diff] [blame] | 1323 | spin_unlock(&inode->i_lock); |
| 1324 | |
Trond Myklebust | 7d52e86 | 2005-06-22 17:16:30 +0000 | [diff] [blame] | 1325 | dfprintk(PAGECACHE, "NFS: (%s/%Ld) data cache invalidated\n", |
| 1326 | inode->i_sb->s_id, |
| 1327 | (long long)NFS_FILEID(inode)); |
| 1328 | } |
Trond Myklebust | 44b1187 | 2006-05-25 01:40:59 -0400 | [diff] [blame] | 1329 | return ret; |
Trond Myklebust | 7d52e86 | 2005-06-22 17:16:30 +0000 | [diff] [blame] | 1330 | } |
| 1331 | |
| 1332 | /** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1333 | * nfs_begin_data_update |
| 1334 | * @inode - pointer to inode |
| 1335 | * Declare that a set of operations will update file data on the server |
| 1336 | */ |
| 1337 | void nfs_begin_data_update(struct inode *inode) |
| 1338 | { |
| 1339 | atomic_inc(&NFS_I(inode)->data_updates); |
| 1340 | } |
| 1341 | |
| 1342 | /** |
| 1343 | * nfs_end_data_update |
| 1344 | * @inode - pointer to inode |
| 1345 | * Declare end of the operations that will update file data |
| 1346 | * This will mark the inode as immediately needing revalidation |
| 1347 | * of its attribute cache. |
| 1348 | */ |
| 1349 | void nfs_end_data_update(struct inode *inode) |
| 1350 | { |
| 1351 | struct nfs_inode *nfsi = NFS_I(inode); |
| 1352 | |
| 1353 | if (!nfs_have_delegation(inode, FMODE_READ)) { |
Trond Myklebust | decf491 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 1354 | /* Directories and symlinks: invalidate page cache */ |
| 1355 | if (S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode)) { |
| 1356 | spin_lock(&inode->i_lock); |
Chuck Lever | 5529680 | 2005-08-18 11:24:09 -0700 | [diff] [blame] | 1357 | nfsi->cache_validity |= NFS_INO_INVALID_DATA; |
Trond Myklebust | decf491 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 1358 | spin_unlock(&inode->i_lock); |
| 1359 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1360 | } |
Trond Myklebust | 913a70f | 2005-10-27 22:12:38 -0400 | [diff] [blame] | 1361 | nfsi->cache_change_attribute = jiffies; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1362 | atomic_dec(&nfsi->data_updates); |
| 1363 | } |
| 1364 | |
Trond Myklebust | a895b4a | 2006-01-03 09:55:40 +0100 | [diff] [blame] | 1365 | static void nfs_wcc_update_inode(struct inode *inode, struct nfs_fattr *fattr) |
| 1366 | { |
| 1367 | struct nfs_inode *nfsi = NFS_I(inode); |
| 1368 | |
Trond Myklebust | a895b4a | 2006-01-03 09:55:40 +0100 | [diff] [blame] | 1369 | /* If we have atomic WCC data, we may update some attributes */ |
| 1370 | if ((fattr->valid & NFS_ATTR_WCC) != 0) { |
| 1371 | if (timespec_equal(&inode->i_ctime, &fattr->pre_ctime)) { |
| 1372 | memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime)); |
| 1373 | nfsi->cache_change_attribute = jiffies; |
| 1374 | } |
| 1375 | if (timespec_equal(&inode->i_mtime, &fattr->pre_mtime)) { |
| 1376 | memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime)); |
| 1377 | nfsi->cache_change_attribute = jiffies; |
| 1378 | } |
| 1379 | if (inode->i_size == fattr->pre_size && nfsi->npages == 0) { |
| 1380 | inode->i_size = fattr->size; |
| 1381 | nfsi->cache_change_attribute = jiffies; |
| 1382 | } |
| 1383 | } |
| 1384 | } |
| 1385 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1386 | /** |
Trond Myklebust | 3380114 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 1387 | * nfs_check_inode_attributes - verify consistency of the inode attribute cache |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1388 | * @inode - pointer to inode |
| 1389 | * @fattr - updated attributes |
| 1390 | * |
| 1391 | * Verifies the attribute cache. If we have just changed the attributes, |
| 1392 | * so that fattr carries weak cache consistency data, then it may |
| 1393 | * also update the ctime/mtime/change_attribute. |
| 1394 | */ |
Trond Myklebust | 3380114 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 1395 | static int nfs_check_inode_attributes(struct inode *inode, struct nfs_fattr *fattr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1396 | { |
| 1397 | struct nfs_inode *nfsi = NFS_I(inode); |
| 1398 | loff_t cur_size, new_isize; |
| 1399 | int data_unstable; |
| 1400 | |
Chuck Lever | dc59250 | 2005-08-18 11:24:12 -0700 | [diff] [blame] | 1401 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1402 | /* Has the inode gone and changed behind our back? */ |
| 1403 | if (nfsi->fileid != fattr->fileid |
Chuck Lever | dc59250 | 2005-08-18 11:24:12 -0700 | [diff] [blame] | 1404 | || (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1405 | return -EIO; |
Chuck Lever | dc59250 | 2005-08-18 11:24:12 -0700 | [diff] [blame] | 1406 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1407 | |
Trond Myklebust | ca62b9c | 2006-03-20 13:44:07 -0500 | [diff] [blame] | 1408 | /* Are we in the process of updating data on the server? */ |
| 1409 | data_unstable = nfs_caches_unstable(inode); |
| 1410 | |
| 1411 | /* Do atomic weak cache consistency updates */ |
| 1412 | nfs_wcc_update_inode(inode, fattr); |
| 1413 | |
Trond Myklebust | 9d1e923 | 2006-05-25 01:40:46 -0400 | [diff] [blame] | 1414 | if ((fattr->valid & NFS_ATTR_FATTR_V4) != 0 && |
Trond Myklebust | f1bb0b9 | 2006-05-25 01:40:55 -0400 | [diff] [blame] | 1415 | nfsi->change_attr != fattr->change_attr) |
| 1416 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1417 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1418 | /* Verify a few of the more important attributes */ |
Trond Myklebust | f1bb0b9 | 2006-05-25 01:40:55 -0400 | [diff] [blame] | 1419 | if (!timespec_equal(&inode->i_mtime, &fattr->mtime)) |
| 1420 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; |
Trond Myklebust | ca62b9c | 2006-03-20 13:44:07 -0500 | [diff] [blame] | 1421 | |
| 1422 | cur_size = i_size_read(inode); |
| 1423 | new_isize = nfs_size_to_loff_t(fattr->size); |
Trond Myklebust | fb374d2 | 2006-03-20 13:44:08 -0500 | [diff] [blame] | 1424 | if (cur_size != new_isize && nfsi->npages == 0) |
| 1425 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1426 | |
| 1427 | /* Have any file permissions changed? */ |
| 1428 | if ((inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO) |
| 1429 | || inode->i_uid != fattr->uid |
| 1430 | || inode->i_gid != fattr->gid) |
Chuck Lever | 5529680 | 2005-08-18 11:24:09 -0700 | [diff] [blame] | 1431 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1432 | |
| 1433 | /* Has the link count changed? */ |
| 1434 | if (inode->i_nlink != fattr->nlink) |
Chuck Lever | 5529680 | 2005-08-18 11:24:09 -0700 | [diff] [blame] | 1435 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1436 | |
| 1437 | if (!timespec_equal(&inode->i_atime, &fattr->atime)) |
Chuck Lever | 5529680 | 2005-08-18 11:24:09 -0700 | [diff] [blame] | 1438 | nfsi->cache_validity |= NFS_INO_INVALID_ATIME; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1439 | |
Trond Myklebust | 3380114 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 1440 | nfsi->read_cache_jiffies = fattr->time_start; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1441 | return 0; |
| 1442 | } |
| 1443 | |
Trond Myklebust | 3380114 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 1444 | /** |
| 1445 | * nfs_refresh_inode - try to update the inode attribute cache |
| 1446 | * @inode - pointer to inode |
| 1447 | * @fattr - updated attributes |
| 1448 | * |
| 1449 | * Check that an RPC call that returned attributes has not overlapped with |
| 1450 | * other recent updates of the inode metadata, then decide whether it is |
| 1451 | * safe to do a full update of the inode attributes, or whether just to |
| 1452 | * call nfs_check_inode_attributes. |
| 1453 | */ |
| 1454 | int nfs_refresh_inode(struct inode *inode, struct nfs_fattr *fattr) |
| 1455 | { |
| 1456 | struct nfs_inode *nfsi = NFS_I(inode); |
| 1457 | int status; |
| 1458 | |
| 1459 | if ((fattr->valid & NFS_ATTR_FATTR) == 0) |
| 1460 | return 0; |
| 1461 | spin_lock(&inode->i_lock); |
Trond Myklebust | 3380114 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 1462 | if (time_after(fattr->time_start, nfsi->last_updated)) |
Trond Myklebust | 24aa1fe | 2005-12-03 15:20:07 -0500 | [diff] [blame] | 1463 | status = nfs_update_inode(inode, fattr); |
Trond Myklebust | 3380114 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 1464 | else |
| 1465 | status = nfs_check_inode_attributes(inode, fattr); |
| 1466 | |
| 1467 | spin_unlock(&inode->i_lock); |
| 1468 | return status; |
| 1469 | } |
| 1470 | |
Trond Myklebust | decf491 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 1471 | /** |
| 1472 | * nfs_post_op_update_inode - try to update the inode attribute cache |
| 1473 | * @inode - pointer to inode |
| 1474 | * @fattr - updated attributes |
| 1475 | * |
| 1476 | * After an operation that has changed the inode metadata, mark the |
| 1477 | * attribute cache as being invalid, then try to update it. |
| 1478 | */ |
| 1479 | int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr) |
| 1480 | { |
| 1481 | struct nfs_inode *nfsi = NFS_I(inode); |
| 1482 | int status = 0; |
| 1483 | |
| 1484 | spin_lock(&inode->i_lock); |
| 1485 | if (unlikely((fattr->valid & NFS_ATTR_FATTR) == 0)) { |
Trond Myklebust | f1bb0b9 | 2006-05-25 01:40:55 -0400 | [diff] [blame] | 1486 | nfsi->cache_validity |= NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; |
Trond Myklebust | decf491 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 1487 | goto out; |
| 1488 | } |
Trond Myklebust | 24aa1fe | 2005-12-03 15:20:07 -0500 | [diff] [blame] | 1489 | status = nfs_update_inode(inode, fattr); |
Trond Myklebust | decf491 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 1490 | out: |
| 1491 | spin_unlock(&inode->i_lock); |
| 1492 | return status; |
| 1493 | } |
| 1494 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1495 | /* |
| 1496 | * Many nfs protocol calls return the new file attributes after |
| 1497 | * an operation. Here we update the inode to reflect the state |
| 1498 | * of the server's inode. |
| 1499 | * |
| 1500 | * This is a bit tricky because we have to make sure all dirty pages |
| 1501 | * have been sent off to the server before calling invalidate_inode_pages. |
| 1502 | * To make sure no other process adds more write requests while we try |
| 1503 | * our best to flush them, we make them sleep during the attribute refresh. |
| 1504 | * |
| 1505 | * A very similar scenario holds for the dir cache. |
| 1506 | */ |
Trond Myklebust | 24aa1fe | 2005-12-03 15:20:07 -0500 | [diff] [blame] | 1507 | static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1508 | { |
Trond Myklebust | 8b4bdcf | 2006-06-09 09:34:19 -0400 | [diff] [blame] | 1509 | struct nfs_server *server; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1510 | struct nfs_inode *nfsi = NFS_I(inode); |
Trond Myklebust | 951a143 | 2005-06-22 17:16:30 +0000 | [diff] [blame] | 1511 | loff_t cur_isize, new_isize; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1512 | unsigned int invalid = 0; |
Trond Myklebust | 24aa1fe | 2005-12-03 15:20:07 -0500 | [diff] [blame] | 1513 | int data_stable; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1514 | |
| 1515 | dfprintk(VFS, "NFS: %s(%s/%ld ct=%d info=0x%x)\n", |
| 1516 | __FUNCTION__, inode->i_sb->s_id, inode->i_ino, |
| 1517 | atomic_read(&inode->i_count), fattr->valid); |
| 1518 | |
Chuck Lever | 325cfed | 2005-11-30 18:08:55 -0500 | [diff] [blame] | 1519 | if (nfsi->fileid != fattr->fileid) |
| 1520 | goto out_fileid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1521 | |
| 1522 | /* |
| 1523 | * Make sure the inode's type hasn't changed. |
| 1524 | */ |
Trond Myklebust | 3380114 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 1525 | if ((inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1526 | goto out_changed; |
| 1527 | |
Trond Myklebust | 8b4bdcf | 2006-06-09 09:34:19 -0400 | [diff] [blame] | 1528 | server = NFS_SERVER(inode); |
| 1529 | /* Update the fsid if and only if this is the root directory */ |
| 1530 | if (inode == inode->i_sb->s_root->d_inode |
| 1531 | && !nfs_fsid_equal(&server->fsid, &fattr->fsid)) |
| 1532 | server->fsid = fattr->fsid; |
| 1533 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1534 | /* |
| 1535 | * Update the read time so we don't revalidate too often. |
| 1536 | */ |
Trond Myklebust | 3380114 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 1537 | nfsi->read_cache_jiffies = fattr->time_start; |
| 1538 | nfsi->last_updated = jiffies; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1539 | |
| 1540 | /* Are we racing with known updates of the metadata on the server? */ |
Trond Myklebust | 24aa1fe | 2005-12-03 15:20:07 -0500 | [diff] [blame] | 1541 | data_stable = nfs_verify_change_attribute(inode, fattr->time_start); |
| 1542 | if (data_stable) |
Trond Myklebust | f1bb0b9 | 2006-05-25 01:40:55 -0400 | [diff] [blame] | 1543 | nfsi->cache_validity &= ~(NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_ATIME); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1544 | |
Trond Myklebust | a895b4a | 2006-01-03 09:55:40 +0100 | [diff] [blame] | 1545 | /* Do atomic weak cache consistency updates */ |
| 1546 | nfs_wcc_update_inode(inode, fattr); |
| 1547 | |
Trond Myklebust | 951a143 | 2005-06-22 17:16:30 +0000 | [diff] [blame] | 1548 | /* Check if our cached file size is stale */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1549 | new_isize = nfs_size_to_loff_t(fattr->size); |
| 1550 | cur_isize = i_size_read(inode); |
Trond Myklebust | 951a143 | 2005-06-22 17:16:30 +0000 | [diff] [blame] | 1551 | if (new_isize != cur_isize) { |
| 1552 | /* Do we perhaps have any outstanding writes? */ |
| 1553 | if (nfsi->npages == 0) { |
| 1554 | /* No, but did we race with nfs_end_data_update()? */ |
Trond Myklebust | 24aa1fe | 2005-12-03 15:20:07 -0500 | [diff] [blame] | 1555 | if (data_stable) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1556 | inode->i_size = new_isize; |
Trond Myklebust | 951a143 | 2005-06-22 17:16:30 +0000 | [diff] [blame] | 1557 | invalid |= NFS_INO_INVALID_DATA; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1558 | } |
Trond Myklebust | 951a143 | 2005-06-22 17:16:30 +0000 | [diff] [blame] | 1559 | invalid |= NFS_INO_INVALID_ATTR; |
| 1560 | } else if (new_isize > cur_isize) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1561 | inode->i_size = new_isize; |
| 1562 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA; |
| 1563 | } |
Trond Myklebust | 24aa1fe | 2005-12-03 15:20:07 -0500 | [diff] [blame] | 1564 | nfsi->cache_change_attribute = jiffies; |
Trond Myklebust | 951a143 | 2005-06-22 17:16:30 +0000 | [diff] [blame] | 1565 | dprintk("NFS: isize change on server for file %s/%ld\n", |
| 1566 | inode->i_sb->s_id, inode->i_ino); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1567 | } |
| 1568 | |
Trond Myklebust | 951a143 | 2005-06-22 17:16:30 +0000 | [diff] [blame] | 1569 | /* Check if the mtime agrees */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1570 | if (!timespec_equal(&inode->i_mtime, &fattr->mtime)) { |
| 1571 | memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime)); |
Trond Myklebust | 951a143 | 2005-06-22 17:16:30 +0000 | [diff] [blame] | 1572 | dprintk("NFS: mtime change on server for file %s/%ld\n", |
| 1573 | inode->i_sb->s_id, inode->i_ino); |
Trond Myklebust | 24aa1fe | 2005-12-03 15:20:07 -0500 | [diff] [blame] | 1574 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA; |
| 1575 | nfsi->cache_change_attribute = jiffies; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1576 | } |
| 1577 | |
Trond Myklebust | ada70d9 | 2005-06-22 17:16:22 +0000 | [diff] [blame] | 1578 | /* If ctime has changed we should definitely clear access+acl caches */ |
| 1579 | if (!timespec_equal(&inode->i_ctime, &fattr->ctime)) { |
Trond Myklebust | 24aa1fe | 2005-12-03 15:20:07 -0500 | [diff] [blame] | 1580 | invalid |= NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
Trond Myklebust | ada70d9 | 2005-06-22 17:16:22 +0000 | [diff] [blame] | 1581 | memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime)); |
Trond Myklebust | 24aa1fe | 2005-12-03 15:20:07 -0500 | [diff] [blame] | 1582 | nfsi->cache_change_attribute = jiffies; |
Trond Myklebust | ada70d9 | 2005-06-22 17:16:22 +0000 | [diff] [blame] | 1583 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1584 | memcpy(&inode->i_atime, &fattr->atime, sizeof(inode->i_atime)); |
| 1585 | |
| 1586 | if ((inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO) || |
| 1587 | inode->i_uid != fattr->uid || |
| 1588 | inode->i_gid != fattr->gid) |
Trond Myklebust | ada70d9 | 2005-06-22 17:16:22 +0000 | [diff] [blame] | 1589 | 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] | 1590 | |
| 1591 | inode->i_mode = fattr->mode; |
| 1592 | inode->i_nlink = fattr->nlink; |
| 1593 | inode->i_uid = fattr->uid; |
| 1594 | inode->i_gid = fattr->gid; |
| 1595 | |
| 1596 | if (fattr->valid & (NFS_ATTR_FATTR_V3 | NFS_ATTR_FATTR_V4)) { |
| 1597 | /* |
| 1598 | * report the blocks in 512byte units |
| 1599 | */ |
| 1600 | inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used); |
| 1601 | inode->i_blksize = inode->i_sb->s_blocksize; |
| 1602 | } else { |
| 1603 | inode->i_blocks = fattr->du.nfs2.blocks; |
| 1604 | inode->i_blksize = fattr->du.nfs2.blocksize; |
| 1605 | } |
| 1606 | |
Trond Myklebust | 9d1e923 | 2006-05-25 01:40:46 -0400 | [diff] [blame] | 1607 | if ((fattr->valid & NFS_ATTR_FATTR_V4) != 0 && |
| 1608 | nfsi->change_attr != fattr->change_attr) { |
| 1609 | dprintk("NFS: change_attr change on server for file %s/%ld\n", |
| 1610 | inode->i_sb->s_id, inode->i_ino); |
| 1611 | nfsi->change_attr = fattr->change_attr; |
| 1612 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
| 1613 | nfsi->cache_change_attribute = jiffies; |
Trond Myklebust | ca62b9c | 2006-03-20 13:44:07 -0500 | [diff] [blame] | 1614 | } |
| 1615 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1616 | /* Update attrtimeo value if we're out of the unstable period */ |
| 1617 | if (invalid & NFS_INO_INVALID_ATTR) { |
Chuck Lever | 91d5b47 | 2006-03-20 13:44:14 -0500 | [diff] [blame] | 1618 | nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1619 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); |
| 1620 | nfsi->attrtimeo_timestamp = jiffies; |
| 1621 | } else if (time_after(jiffies, nfsi->attrtimeo_timestamp+nfsi->attrtimeo)) { |
| 1622 | if ((nfsi->attrtimeo <<= 1) > NFS_MAXATTRTIMEO(inode)) |
| 1623 | nfsi->attrtimeo = NFS_MAXATTRTIMEO(inode); |
| 1624 | nfsi->attrtimeo_timestamp = jiffies; |
| 1625 | } |
| 1626 | /* Don't invalidate the data if we were to blame */ |
| 1627 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) |
| 1628 | || S_ISLNK(inode->i_mode))) |
| 1629 | invalid &= ~NFS_INO_INVALID_DATA; |
Trond Myklebust | 24aa1fe | 2005-12-03 15:20:07 -0500 | [diff] [blame] | 1630 | if (data_stable) |
| 1631 | invalid &= ~(NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ATIME|NFS_INO_REVAL_PAGECACHE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1632 | if (!nfs_have_delegation(inode, FMODE_READ)) |
Chuck Lever | 5529680 | 2005-08-18 11:24:09 -0700 | [diff] [blame] | 1633 | nfsi->cache_validity |= invalid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1634 | |
| 1635 | return 0; |
| 1636 | out_changed: |
| 1637 | /* |
| 1638 | * Big trouble! The inode has become a different object. |
| 1639 | */ |
| 1640 | #ifdef NFS_PARANOIA |
| 1641 | printk(KERN_DEBUG "%s: inode %ld mode changed, %07o to %07o\n", |
| 1642 | __FUNCTION__, inode->i_ino, inode->i_mode, fattr->mode); |
| 1643 | #endif |
Trond Myklebust | b37b03b | 2005-11-25 17:10:06 -0500 | [diff] [blame] | 1644 | out_err: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1645 | /* |
| 1646 | * No need to worry about unhashing the dentry, as the |
| 1647 | * lookup validation will know that the inode is bad. |
| 1648 | * (But we fall through to invalidate the caches.) |
| 1649 | */ |
| 1650 | nfs_invalidate_inode(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1651 | return -ESTALE; |
Chuck Lever | 325cfed | 2005-11-30 18:08:55 -0500 | [diff] [blame] | 1652 | |
| 1653 | out_fileid: |
| 1654 | printk(KERN_ERR "NFS: server %s error: fileid changed\n" |
| 1655 | "fsid %s: expected fileid 0x%Lx, got 0x%Lx\n", |
| 1656 | NFS_SERVER(inode)->hostname, inode->i_sb->s_id, |
| 1657 | (long long)nfsi->fileid, (long long)fattr->fileid); |
| 1658 | goto out_err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1659 | } |
| 1660 | |
| 1661 | /* |
| 1662 | * File system information |
| 1663 | */ |
| 1664 | |
Trond Myklebust | 55a9759 | 2006-06-09 09:34:19 -0400 | [diff] [blame] | 1665 | /* |
| 1666 | * nfs_path - reconstruct the path given an arbitrary dentry |
| 1667 | * @base - arbitrary string to prepend to the path |
| 1668 | * @dentry - pointer to dentry |
| 1669 | * @buffer - result buffer |
| 1670 | * @buflen - length of buffer |
| 1671 | * |
| 1672 | * Helper function for constructing the path from the |
| 1673 | * root dentry to an arbitrary hashed dentry. |
| 1674 | * |
| 1675 | * This is mainly for use in figuring out the path on the |
| 1676 | * server side when automounting on top of an existing partition. |
| 1677 | */ |
| 1678 | static char *nfs_path(const char *base, const struct dentry *dentry, |
| 1679 | char *buffer, ssize_t buflen) |
| 1680 | { |
| 1681 | char *end = buffer+buflen; |
| 1682 | int namelen; |
| 1683 | |
| 1684 | *--end = '\0'; |
| 1685 | buflen--; |
| 1686 | spin_lock(&dcache_lock); |
| 1687 | while (!IS_ROOT(dentry)) { |
| 1688 | namelen = dentry->d_name.len; |
| 1689 | buflen -= namelen + 1; |
| 1690 | if (buflen < 0) |
| 1691 | goto Elong; |
| 1692 | end -= namelen; |
| 1693 | memcpy(end, dentry->d_name.name, namelen); |
| 1694 | *--end = '/'; |
| 1695 | dentry = dentry->d_parent; |
| 1696 | } |
| 1697 | spin_unlock(&dcache_lock); |
| 1698 | namelen = strlen(base); |
| 1699 | /* Strip off excess slashes in base string */ |
| 1700 | while (namelen > 0 && base[namelen - 1] == '/') |
| 1701 | namelen--; |
| 1702 | buflen -= namelen; |
| 1703 | if (buflen < 0) |
| 1704 | goto Elong; |
| 1705 | end -= namelen; |
| 1706 | memcpy(end, base, namelen); |
| 1707 | return end; |
| 1708 | Elong: |
| 1709 | return ERR_PTR(-ENAMETOOLONG); |
| 1710 | } |
| 1711 | |
| 1712 | struct nfs_clone_mount { |
| 1713 | const struct super_block *sb; |
| 1714 | const struct dentry *dentry; |
| 1715 | struct nfs_fh *fh; |
| 1716 | struct nfs_fattr *fattr; |
| 1717 | }; |
| 1718 | |
| 1719 | static struct super_block *nfs_clone_generic_sb(struct nfs_clone_mount *data, |
| 1720 | struct super_block *(*clone_client)(struct nfs_server *, struct nfs_clone_mount *)) |
| 1721 | { |
| 1722 | struct nfs_server *server; |
| 1723 | struct nfs_server *parent = NFS_SB(data->sb); |
| 1724 | struct super_block *sb = ERR_PTR(-EINVAL); |
| 1725 | void *err = ERR_PTR(-ENOMEM); |
| 1726 | struct inode *root_inode; |
| 1727 | struct nfs_fsinfo fsinfo; |
| 1728 | int len; |
| 1729 | |
| 1730 | server = kmalloc(sizeof(struct nfs_server), GFP_KERNEL); |
| 1731 | if (server == NULL) |
| 1732 | goto out_err; |
| 1733 | memcpy(server, parent, sizeof(*server)); |
| 1734 | len = strlen(parent->hostname) + 1; |
| 1735 | server->hostname = kmalloc(len, GFP_KERNEL); |
| 1736 | if (server->hostname == NULL) |
| 1737 | goto free_server; |
| 1738 | memcpy(server->hostname, parent->hostname, len); |
| 1739 | server->fsid = data->fattr->fsid; |
| 1740 | nfs_copy_fh(&server->fh, data->fh); |
| 1741 | if (rpciod_up() != 0) |
| 1742 | goto free_hostname; |
| 1743 | |
| 1744 | sb = clone_client(server, data); |
| 1745 | if (IS_ERR((err = sb)) || sb->s_root) |
| 1746 | goto kill_rpciod; |
| 1747 | |
| 1748 | sb->s_op = data->sb->s_op; |
| 1749 | sb->s_blocksize = data->sb->s_blocksize; |
| 1750 | sb->s_blocksize_bits = data->sb->s_blocksize_bits; |
| 1751 | sb->s_maxbytes = data->sb->s_maxbytes; |
| 1752 | |
| 1753 | server->client_sys = server->client_acl = ERR_PTR(-EINVAL); |
| 1754 | err = ERR_PTR(-ENOMEM); |
| 1755 | server->io_stats = nfs_alloc_iostats(); |
| 1756 | if (server->io_stats == NULL) |
| 1757 | goto out_deactivate; |
| 1758 | |
| 1759 | server->client = rpc_clone_client(parent->client); |
| 1760 | if (IS_ERR((err = server->client))) |
| 1761 | goto out_deactivate; |
| 1762 | if (!IS_ERR(parent->client_sys)) { |
| 1763 | server->client_sys = rpc_clone_client(parent->client_sys); |
| 1764 | if (IS_ERR((err = server->client_sys))) |
| 1765 | goto out_deactivate; |
| 1766 | } |
| 1767 | if (!IS_ERR(parent->client_acl)) { |
| 1768 | server->client_acl = rpc_clone_client(parent->client_acl); |
| 1769 | if (IS_ERR((err = server->client_acl))) |
| 1770 | goto out_deactivate; |
| 1771 | } |
| 1772 | root_inode = nfs_fhget(sb, data->fh, data->fattr); |
| 1773 | if (!root_inode) |
| 1774 | goto out_deactivate; |
| 1775 | sb->s_root = d_alloc_root(root_inode); |
| 1776 | if (!sb->s_root) |
| 1777 | goto out_put_root; |
| 1778 | fsinfo.fattr = data->fattr; |
| 1779 | if (NFS_PROTO(root_inode)->fsinfo(server, data->fh, &fsinfo) == 0) |
| 1780 | nfs_super_set_maxbytes(sb, fsinfo.maxfilesize); |
| 1781 | sb->s_root->d_op = server->rpc_ops->dentry_ops; |
| 1782 | sb->s_flags |= MS_ACTIVE; |
| 1783 | return sb; |
| 1784 | out_put_root: |
| 1785 | iput(root_inode); |
| 1786 | out_deactivate: |
| 1787 | up_write(&sb->s_umount); |
| 1788 | deactivate_super(sb); |
| 1789 | return (struct super_block *)err; |
| 1790 | kill_rpciod: |
| 1791 | rpciod_down(); |
| 1792 | free_hostname: |
| 1793 | kfree(server->hostname); |
| 1794 | free_server: |
| 1795 | kfree(server); |
| 1796 | out_err: |
| 1797 | return (struct super_block *)err; |
| 1798 | } |
| 1799 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1800 | static int nfs_set_super(struct super_block *s, void *data) |
| 1801 | { |
| 1802 | s->s_fs_info = data; |
| 1803 | return set_anon_super(s, data); |
| 1804 | } |
| 1805 | |
| 1806 | static int nfs_compare_super(struct super_block *sb, void *data) |
| 1807 | { |
| 1808 | struct nfs_server *server = data; |
| 1809 | struct nfs_server *old = NFS_SB(sb); |
| 1810 | |
| 1811 | if (old->addr.sin_addr.s_addr != server->addr.sin_addr.s_addr) |
| 1812 | return 0; |
| 1813 | if (old->addr.sin_port != server->addr.sin_port) |
| 1814 | return 0; |
| 1815 | return !nfs_compare_fh(&old->fh, &server->fh); |
| 1816 | } |
| 1817 | |
| 1818 | static struct super_block *nfs_get_sb(struct file_system_type *fs_type, |
| 1819 | int flags, const char *dev_name, void *raw_data) |
| 1820 | { |
| 1821 | int error; |
Trond Myklebust | 9085bbc | 2005-06-22 17:16:20 +0000 | [diff] [blame] | 1822 | struct nfs_server *server = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1823 | struct super_block *s; |
| 1824 | struct nfs_fh *root; |
| 1825 | struct nfs_mount_data *data = raw_data; |
| 1826 | |
Trond Myklebust | 9085bbc | 2005-06-22 17:16:20 +0000 | [diff] [blame] | 1827 | s = ERR_PTR(-EINVAL); |
| 1828 | if (data == NULL) { |
| 1829 | dprintk("%s: missing data argument\n", __FUNCTION__); |
| 1830 | goto out_err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1831 | } |
Trond Myklebust | 9085bbc | 2005-06-22 17:16:20 +0000 | [diff] [blame] | 1832 | if (data->version <= 0 || data->version > NFS_MOUNT_VERSION) { |
| 1833 | dprintk("%s: bad mount version\n", __FUNCTION__); |
| 1834 | goto out_err; |
| 1835 | } |
| 1836 | switch (data->version) { |
| 1837 | case 1: |
| 1838 | data->namlen = 0; |
| 1839 | case 2: |
| 1840 | data->bsize = 0; |
| 1841 | case 3: |
| 1842 | if (data->flags & NFS_MOUNT_VER3) { |
| 1843 | dprintk("%s: mount structure version %d does not support NFSv3\n", |
| 1844 | __FUNCTION__, |
| 1845 | data->version); |
| 1846 | goto out_err; |
| 1847 | } |
| 1848 | data->root.size = NFS2_FHSIZE; |
| 1849 | memcpy(data->root.data, data->old_root.data, NFS2_FHSIZE); |
| 1850 | case 4: |
| 1851 | if (data->flags & NFS_MOUNT_SECFLAVOUR) { |
| 1852 | dprintk("%s: mount structure version %d does not support strong security\n", |
| 1853 | __FUNCTION__, |
| 1854 | data->version); |
| 1855 | goto out_err; |
| 1856 | } |
| 1857 | case 5: |
| 1858 | memset(data->context, 0, sizeof(data->context)); |
| 1859 | } |
| 1860 | #ifndef CONFIG_NFS_V3 |
| 1861 | /* If NFSv3 is not compiled in, return -EPROTONOSUPPORT */ |
| 1862 | s = ERR_PTR(-EPROTONOSUPPORT); |
| 1863 | if (data->flags & NFS_MOUNT_VER3) { |
| 1864 | dprintk("%s: NFSv3 not compiled into kernel\n", __FUNCTION__); |
| 1865 | goto out_err; |
| 1866 | } |
| 1867 | #endif /* CONFIG_NFS_V3 */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1868 | |
Trond Myklebust | 9085bbc | 2005-06-22 17:16:20 +0000 | [diff] [blame] | 1869 | s = ERR_PTR(-ENOMEM); |
Eric Sesterhenn | bd64754 | 2006-03-20 13:44:10 -0500 | [diff] [blame] | 1870 | server = kzalloc(sizeof(struct nfs_server), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1871 | if (!server) |
Trond Myklebust | 9085bbc | 2005-06-22 17:16:20 +0000 | [diff] [blame] | 1872 | goto out_err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1873 | /* Zero out the NFS state stuff */ |
| 1874 | init_nfsv4_state(server); |
Andreas Gruenbacher | b7fa055 | 2005-06-22 17:16:27 +0000 | [diff] [blame] | 1875 | server->client = server->client_sys = server->client_acl = ERR_PTR(-EINVAL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1876 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1877 | root = &server->fh; |
| 1878 | if (data->flags & NFS_MOUNT_VER3) |
| 1879 | root->size = data->root.size; |
| 1880 | else |
| 1881 | root->size = NFS2_FHSIZE; |
Trond Myklebust | 9085bbc | 2005-06-22 17:16:20 +0000 | [diff] [blame] | 1882 | s = ERR_PTR(-EINVAL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1883 | if (root->size > sizeof(root->data)) { |
Trond Myklebust | 9085bbc | 2005-06-22 17:16:20 +0000 | [diff] [blame] | 1884 | dprintk("%s: invalid root filehandle\n", __FUNCTION__); |
| 1885 | goto out_err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1886 | } |
| 1887 | memcpy(root->data, data->root.data, root->size); |
| 1888 | |
| 1889 | /* We now require that the mount process passes the remote address */ |
| 1890 | memcpy(&server->addr, &data->addr, sizeof(server->addr)); |
| 1891 | if (server->addr.sin_addr.s_addr == INADDR_ANY) { |
Trond Myklebust | 9085bbc | 2005-06-22 17:16:20 +0000 | [diff] [blame] | 1892 | dprintk("%s: mount program didn't pass remote address!\n", |
| 1893 | __FUNCTION__); |
| 1894 | goto out_err; |
| 1895 | } |
| 1896 | |
| 1897 | /* Fire up rpciod if not yet running */ |
| 1898 | s = ERR_PTR(rpciod_up()); |
| 1899 | if (IS_ERR(s)) { |
| 1900 | dprintk("%s: couldn't start rpciod! Error = %ld\n", |
| 1901 | __FUNCTION__, PTR_ERR(s)); |
| 1902 | goto out_err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1903 | } |
| 1904 | |
| 1905 | s = sget(fs_type, nfs_compare_super, nfs_set_super, server); |
Trond Myklebust | 9085bbc | 2005-06-22 17:16:20 +0000 | [diff] [blame] | 1906 | if (IS_ERR(s) || s->s_root) |
| 1907 | goto out_rpciod_down; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1908 | |
| 1909 | s->s_flags = flags; |
| 1910 | |
Theodore Ts'o | 9b04c99 | 2006-03-24 03:15:10 -0800 | [diff] [blame] | 1911 | error = nfs_fill_super(s, data, flags & MS_SILENT ? 1 : 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1912 | if (error) { |
| 1913 | up_write(&s->s_umount); |
| 1914 | deactivate_super(s); |
| 1915 | return ERR_PTR(error); |
| 1916 | } |
| 1917 | s->s_flags |= MS_ACTIVE; |
| 1918 | return s; |
Trond Myklebust | 9085bbc | 2005-06-22 17:16:20 +0000 | [diff] [blame] | 1919 | out_rpciod_down: |
| 1920 | rpciod_down(); |
| 1921 | out_err: |
| 1922 | kfree(server); |
| 1923 | return s; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1924 | } |
| 1925 | |
| 1926 | static void nfs_kill_super(struct super_block *s) |
| 1927 | { |
| 1928 | struct nfs_server *server = NFS_SB(s); |
| 1929 | |
| 1930 | kill_anon_super(s); |
| 1931 | |
J. Bruce Fields | 6a19275 | 2005-06-22 17:16:23 +0000 | [diff] [blame] | 1932 | if (!IS_ERR(server->client)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1933 | rpc_shutdown_client(server->client); |
J. Bruce Fields | 6a19275 | 2005-06-22 17:16:23 +0000 | [diff] [blame] | 1934 | if (!IS_ERR(server->client_sys)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1935 | rpc_shutdown_client(server->client_sys); |
Andreas Gruenbacher | b7fa055 | 2005-06-22 17:16:27 +0000 | [diff] [blame] | 1936 | if (!IS_ERR(server->client_acl)) |
| 1937 | rpc_shutdown_client(server->client_acl); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1938 | |
| 1939 | if (!(server->flags & NFS_MOUNT_NONLM)) |
| 1940 | lockd_down(); /* release rpc.lockd */ |
| 1941 | |
| 1942 | rpciod_down(); /* release rpciod */ |
| 1943 | |
Trond Myklebust | 01d0ae8 | 2006-03-20 13:44:48 -0500 | [diff] [blame] | 1944 | nfs_free_iostats(server->io_stats); |
Jesper Juhl | f99d49a | 2005-11-07 01:01:34 -0800 | [diff] [blame] | 1945 | kfree(server->hostname); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1946 | kfree(server); |
Trond Myklebust | 51d8fa6 | 2006-06-09 09:34:20 -0400 | [diff] [blame] | 1947 | nfs_release_automount_timer(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1948 | } |
| 1949 | |
| 1950 | static struct file_system_type nfs_fs_type = { |
| 1951 | .owner = THIS_MODULE, |
| 1952 | .name = "nfs", |
| 1953 | .get_sb = nfs_get_sb, |
| 1954 | .kill_sb = nfs_kill_super, |
| 1955 | .fs_flags = FS_ODD_RENAME|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, |
| 1956 | }; |
| 1957 | |
Trond Myklebust | 55a9759 | 2006-06-09 09:34:19 -0400 | [diff] [blame] | 1958 | static struct super_block *nfs_clone_client(struct nfs_server *server, struct nfs_clone_mount *data) |
| 1959 | { |
| 1960 | struct super_block *sb; |
| 1961 | |
| 1962 | sb = sget(&nfs_fs_type, nfs_compare_super, nfs_set_super, server); |
| 1963 | if (!IS_ERR(sb) && sb->s_root == NULL && !(server->flags & NFS_MOUNT_NONLM)) |
| 1964 | lockd_up(); |
| 1965 | return sb; |
| 1966 | } |
| 1967 | |
| 1968 | static struct super_block *nfs_clone_nfs_sb(struct file_system_type *fs_type, |
| 1969 | int flags, const char *dev_name, void *raw_data) |
| 1970 | { |
| 1971 | struct nfs_clone_mount *data = raw_data; |
| 1972 | return nfs_clone_generic_sb(data, nfs_clone_client); |
| 1973 | } |
| 1974 | |
| 1975 | static struct file_system_type clone_nfs_fs_type = { |
| 1976 | .owner = THIS_MODULE, |
| 1977 | .name = "nfs", |
| 1978 | .get_sb = nfs_clone_nfs_sb, |
| 1979 | .kill_sb = nfs_kill_super, |
| 1980 | .fs_flags = FS_ODD_RENAME|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, |
| 1981 | }; |
| 1982 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1983 | #ifdef CONFIG_NFS_V4 |
| 1984 | |
| 1985 | static void nfs4_clear_inode(struct inode *); |
| 1986 | |
| 1987 | |
| 1988 | static struct super_operations nfs4_sops = { |
| 1989 | .alloc_inode = nfs_alloc_inode, |
| 1990 | .destroy_inode = nfs_destroy_inode, |
| 1991 | .write_inode = nfs_write_inode, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1992 | .statfs = nfs_statfs, |
| 1993 | .clear_inode = nfs4_clear_inode, |
| 1994 | .umount_begin = nfs_umount_begin, |
| 1995 | .show_options = nfs_show_options, |
Chuck Lever | d9ef5a8 | 2006-03-20 13:44:13 -0500 | [diff] [blame] | 1996 | .show_stats = nfs_show_stats, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1997 | }; |
| 1998 | |
| 1999 | /* |
| 2000 | * Clean out any remaining NFSv4 state that might be left over due |
| 2001 | * to open() calls that passed nfs_atomic_lookup, but failed to call |
| 2002 | * nfs_open(). |
| 2003 | */ |
| 2004 | static void nfs4_clear_inode(struct inode *inode) |
| 2005 | { |
| 2006 | struct nfs_inode *nfsi = NFS_I(inode); |
| 2007 | |
| 2008 | /* If we are holding a delegation, return it! */ |
Trond Myklebust | cae7a07 | 2005-10-18 14:20:19 -0700 | [diff] [blame] | 2009 | nfs_inode_return_delegation(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2010 | /* First call standard NFS clear_inode() code */ |
| 2011 | nfs_clear_inode(inode); |
| 2012 | /* Now clear out any remaining state */ |
| 2013 | while (!list_empty(&nfsi->open_states)) { |
| 2014 | struct nfs4_state *state; |
| 2015 | |
| 2016 | state = list_entry(nfsi->open_states.next, |
| 2017 | struct nfs4_state, |
| 2018 | inode_states); |
| 2019 | dprintk("%s(%s/%Ld): found unclaimed NFSv4 state %p\n", |
| 2020 | __FUNCTION__, |
| 2021 | inode->i_sb->s_id, |
| 2022 | (long long)NFS_FILEID(inode), |
| 2023 | state); |
| 2024 | BUG_ON(atomic_read(&state->count) != 1); |
| 2025 | nfs4_close_state(state, state->state); |
| 2026 | } |
| 2027 | } |
| 2028 | |
| 2029 | |
Manoj Naik | c818ba4 | 2006-06-09 09:34:26 -0400 | [diff] [blame^] | 2030 | static struct rpc_clnt *nfs4_create_client(struct nfs_server *server, |
| 2031 | struct rpc_timeout *timeparms, int proto, rpc_authflavor_t flavor) |
| 2032 | { |
| 2033 | struct nfs4_client *clp; |
| 2034 | struct rpc_xprt *xprt = NULL; |
| 2035 | struct rpc_clnt *clnt = NULL; |
| 2036 | int err = -EIO; |
| 2037 | |
| 2038 | clp = nfs4_get_client(&server->addr.sin_addr); |
| 2039 | if (!clp) { |
| 2040 | dprintk("%s: failed to create NFS4 client.\n", __FUNCTION__); |
| 2041 | return ERR_PTR(err); |
| 2042 | } |
| 2043 | |
| 2044 | /* Now create transport and client */ |
| 2045 | down_write(&clp->cl_sem); |
| 2046 | if (IS_ERR(clp->cl_rpcclient)) { |
| 2047 | xprt = xprt_create_proto(proto, &server->addr, timeparms); |
| 2048 | if (IS_ERR(xprt)) { |
| 2049 | up_write(&clp->cl_sem); |
| 2050 | err = PTR_ERR(xprt); |
| 2051 | dprintk("%s: cannot create RPC transport. Error = %d\n", |
| 2052 | __FUNCTION__, err); |
| 2053 | goto out_fail; |
| 2054 | } |
| 2055 | clnt = rpc_create_client(xprt, server->hostname, &nfs_program, |
| 2056 | server->rpc_ops->version, flavor); |
| 2057 | if (IS_ERR(clnt)) { |
| 2058 | up_write(&clp->cl_sem); |
| 2059 | err = PTR_ERR(clnt); |
| 2060 | dprintk("%s: cannot create RPC client. Error = %d\n", |
| 2061 | __FUNCTION__, err); |
| 2062 | goto out_fail; |
| 2063 | } |
| 2064 | clnt->cl_intr = 1; |
| 2065 | clnt->cl_softrtry = 1; |
| 2066 | clp->cl_rpcclient = clnt; |
| 2067 | memcpy(clp->cl_ipaddr, server->ip_addr, sizeof(clp->cl_ipaddr)); |
| 2068 | nfs_idmap_new(clp); |
| 2069 | } |
| 2070 | list_add_tail(&server->nfs4_siblings, &clp->cl_superblocks); |
| 2071 | clnt = rpc_clone_client(clp->cl_rpcclient); |
| 2072 | if (!IS_ERR(clnt)) |
| 2073 | server->nfs4_state = clp; |
| 2074 | up_write(&clp->cl_sem); |
| 2075 | clp = NULL; |
| 2076 | |
| 2077 | if (IS_ERR(clnt)) { |
| 2078 | dprintk("%s: cannot create RPC client. Error = %d\n", |
| 2079 | __FUNCTION__, err); |
| 2080 | return clnt; |
| 2081 | } |
| 2082 | |
| 2083 | if (server->nfs4_state->cl_idmap == NULL) { |
| 2084 | dprintk("%s: failed to create idmapper.\n", __FUNCTION__); |
| 2085 | return ERR_PTR(-ENOMEM); |
| 2086 | } |
| 2087 | |
| 2088 | if (clnt->cl_auth->au_flavor != flavor) { |
| 2089 | struct rpc_auth *auth; |
| 2090 | |
| 2091 | auth = rpcauth_create(flavor, clnt); |
| 2092 | if (IS_ERR(auth)) { |
| 2093 | dprintk("%s: couldn't create credcache!\n", __FUNCTION__); |
| 2094 | return (struct rpc_clnt *)auth; |
| 2095 | } |
| 2096 | } |
| 2097 | return clnt; |
| 2098 | |
| 2099 | out_fail: |
| 2100 | if (clp) |
| 2101 | nfs4_put_client(clp); |
| 2102 | return ERR_PTR(err); |
| 2103 | } |
| 2104 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2105 | static int nfs4_fill_super(struct super_block *sb, struct nfs4_mount_data *data, int silent) |
| 2106 | { |
| 2107 | struct nfs_server *server; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2108 | struct rpc_timeout timeparms; |
| 2109 | rpc_authflavor_t authflavour; |
Chuck Lever | eab5c08 | 2005-08-11 16:25:14 -0400 | [diff] [blame] | 2110 | int err = -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2111 | |
| 2112 | sb->s_blocksize_bits = 0; |
| 2113 | sb->s_blocksize = 0; |
| 2114 | server = NFS_SB(sb); |
| 2115 | if (data->rsize != 0) |
| 2116 | server->rsize = nfs_block_size(data->rsize, NULL); |
| 2117 | if (data->wsize != 0) |
| 2118 | server->wsize = nfs_block_size(data->wsize, NULL); |
| 2119 | server->flags = data->flags & NFS_MOUNT_FLAGMASK; |
| 2120 | server->caps = NFS_CAP_ATOMIC_OPEN; |
| 2121 | |
| 2122 | server->acregmin = data->acregmin*HZ; |
| 2123 | server->acregmax = data->acregmax*HZ; |
| 2124 | server->acdirmin = data->acdirmin*HZ; |
| 2125 | server->acdirmax = data->acdirmax*HZ; |
| 2126 | |
| 2127 | server->rpc_ops = &nfs_v4_clientops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2128 | |
Chuck Lever | eab5c08 | 2005-08-11 16:25:14 -0400 | [diff] [blame] | 2129 | nfs_init_timeout_values(&timeparms, data->proto, data->timeo, data->retrans); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2130 | |
Chuck Lever | 7a480e2 | 2006-03-20 13:44:12 -0500 | [diff] [blame] | 2131 | server->retrans_timeo = timeparms.to_initval; |
| 2132 | server->retrans_count = timeparms.to_retries; |
| 2133 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2134 | /* Now create transport and client */ |
| 2135 | authflavour = RPC_AUTH_UNIX; |
| 2136 | if (data->auth_flavourlen != 0) { |
Trond Myklebust | 9085bbc | 2005-06-22 17:16:20 +0000 | [diff] [blame] | 2137 | if (data->auth_flavourlen != 1) { |
| 2138 | dprintk("%s: Invalid number of RPC auth flavours %d.\n", |
| 2139 | __FUNCTION__, data->auth_flavourlen); |
| 2140 | err = -EINVAL; |
| 2141 | goto out_fail; |
| 2142 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2143 | if (copy_from_user(&authflavour, data->auth_flavours, sizeof(authflavour))) { |
| 2144 | err = -EFAULT; |
| 2145 | goto out_fail; |
| 2146 | } |
| 2147 | } |
| 2148 | |
Manoj Naik | c818ba4 | 2006-06-09 09:34:26 -0400 | [diff] [blame^] | 2149 | server->client = nfs4_create_client(server, &timeparms, data->proto, authflavour); |
| 2150 | if (IS_ERR(server->client)) { |
| 2151 | err = PTR_ERR(server->client); |
Trond Myklebust | 9085bbc | 2005-06-22 17:16:20 +0000 | [diff] [blame] | 2152 | dprintk("%s: cannot create RPC client. Error = %d\n", |
| 2153 | __FUNCTION__, err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2154 | goto out_fail; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2155 | } |
| 2156 | |
| 2157 | sb->s_time_gran = 1; |
| 2158 | |
| 2159 | sb->s_op = &nfs4_sops; |
| 2160 | err = nfs_sb_init(sb, authflavour); |
Manoj Naik | c818ba4 | 2006-06-09 09:34:26 -0400 | [diff] [blame^] | 2161 | |
| 2162 | out_fail: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2163 | return err; |
| 2164 | } |
| 2165 | |
| 2166 | static int nfs4_compare_super(struct super_block *sb, void *data) |
| 2167 | { |
| 2168 | struct nfs_server *server = data; |
| 2169 | struct nfs_server *old = NFS_SB(sb); |
| 2170 | |
| 2171 | if (strcmp(server->hostname, old->hostname) != 0) |
| 2172 | return 0; |
| 2173 | if (strcmp(server->mnt_path, old->mnt_path) != 0) |
| 2174 | return 0; |
| 2175 | return 1; |
| 2176 | } |
| 2177 | |
| 2178 | static void * |
| 2179 | nfs_copy_user_string(char *dst, struct nfs_string *src, int maxlen) |
| 2180 | { |
| 2181 | void *p = NULL; |
| 2182 | |
| 2183 | if (!src->len) |
| 2184 | return ERR_PTR(-EINVAL); |
| 2185 | if (src->len < maxlen) |
| 2186 | maxlen = src->len; |
| 2187 | if (dst == NULL) { |
| 2188 | p = dst = kmalloc(maxlen + 1, GFP_KERNEL); |
| 2189 | if (p == NULL) |
| 2190 | return ERR_PTR(-ENOMEM); |
| 2191 | } |
| 2192 | if (copy_from_user(dst, src->data, maxlen)) { |
Jesper Juhl | f99d49a | 2005-11-07 01:01:34 -0800 | [diff] [blame] | 2193 | kfree(p); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2194 | return ERR_PTR(-EFAULT); |
| 2195 | } |
| 2196 | dst[maxlen] = '\0'; |
| 2197 | return dst; |
| 2198 | } |
| 2199 | |
| 2200 | static struct super_block *nfs4_get_sb(struct file_system_type *fs_type, |
| 2201 | int flags, const char *dev_name, void *raw_data) |
| 2202 | { |
| 2203 | int error; |
| 2204 | struct nfs_server *server; |
| 2205 | struct super_block *s; |
| 2206 | struct nfs4_mount_data *data = raw_data; |
| 2207 | void *p; |
| 2208 | |
Trond Myklebust | 9085bbc | 2005-06-22 17:16:20 +0000 | [diff] [blame] | 2209 | if (data == NULL) { |
| 2210 | dprintk("%s: missing data argument\n", __FUNCTION__); |
| 2211 | return ERR_PTR(-EINVAL); |
| 2212 | } |
| 2213 | if (data->version <= 0 || data->version > NFS4_MOUNT_VERSION) { |
| 2214 | dprintk("%s: bad mount version\n", __FUNCTION__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2215 | return ERR_PTR(-EINVAL); |
| 2216 | } |
| 2217 | |
Eric Sesterhenn | bd64754 | 2006-03-20 13:44:10 -0500 | [diff] [blame] | 2218 | server = kzalloc(sizeof(struct nfs_server), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2219 | if (!server) |
| 2220 | return ERR_PTR(-ENOMEM); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2221 | /* Zero out the NFS state stuff */ |
| 2222 | init_nfsv4_state(server); |
Andreas Gruenbacher | b7fa055 | 2005-06-22 17:16:27 +0000 | [diff] [blame] | 2223 | server->client = server->client_sys = server->client_acl = ERR_PTR(-EINVAL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2224 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2225 | p = nfs_copy_user_string(NULL, &data->hostname, 256); |
| 2226 | if (IS_ERR(p)) |
| 2227 | goto out_err; |
| 2228 | server->hostname = p; |
| 2229 | |
| 2230 | p = nfs_copy_user_string(NULL, &data->mnt_path, 1024); |
| 2231 | if (IS_ERR(p)) |
| 2232 | goto out_err; |
| 2233 | server->mnt_path = p; |
| 2234 | |
| 2235 | p = nfs_copy_user_string(server->ip_addr, &data->client_addr, |
| 2236 | sizeof(server->ip_addr) - 1); |
| 2237 | if (IS_ERR(p)) |
| 2238 | goto out_err; |
| 2239 | |
| 2240 | /* We now require that the mount process passes the remote address */ |
| 2241 | if (data->host_addrlen != sizeof(server->addr)) { |
| 2242 | s = ERR_PTR(-EINVAL); |
| 2243 | goto out_free; |
| 2244 | } |
| 2245 | if (copy_from_user(&server->addr, data->host_addr, sizeof(server->addr))) { |
| 2246 | s = ERR_PTR(-EFAULT); |
| 2247 | goto out_free; |
| 2248 | } |
| 2249 | if (server->addr.sin_family != AF_INET || |
| 2250 | server->addr.sin_addr.s_addr == INADDR_ANY) { |
Trond Myklebust | 9085bbc | 2005-06-22 17:16:20 +0000 | [diff] [blame] | 2251 | dprintk("%s: mount program didn't pass remote IP address!\n", |
| 2252 | __FUNCTION__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2253 | s = ERR_PTR(-EINVAL); |
| 2254 | goto out_free; |
| 2255 | } |
| 2256 | |
Trond Myklebust | 9085bbc | 2005-06-22 17:16:20 +0000 | [diff] [blame] | 2257 | /* Fire up rpciod if not yet running */ |
| 2258 | s = ERR_PTR(rpciod_up()); |
| 2259 | if (IS_ERR(s)) { |
| 2260 | dprintk("%s: couldn't start rpciod! Error = %ld\n", |
| 2261 | __FUNCTION__, PTR_ERR(s)); |
| 2262 | goto out_free; |
| 2263 | } |
| 2264 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2265 | s = sget(fs_type, nfs4_compare_super, nfs_set_super, server); |
| 2266 | |
| 2267 | if (IS_ERR(s) || s->s_root) |
| 2268 | goto out_free; |
| 2269 | |
| 2270 | s->s_flags = flags; |
| 2271 | |
Theodore Ts'o | 9b04c99 | 2006-03-24 03:15:10 -0800 | [diff] [blame] | 2272 | error = nfs4_fill_super(s, data, flags & MS_SILENT ? 1 : 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2273 | if (error) { |
| 2274 | up_write(&s->s_umount); |
| 2275 | deactivate_super(s); |
| 2276 | return ERR_PTR(error); |
| 2277 | } |
| 2278 | s->s_flags |= MS_ACTIVE; |
| 2279 | return s; |
| 2280 | out_err: |
| 2281 | s = (struct super_block *)p; |
| 2282 | out_free: |
Jesper Juhl | f99d49a | 2005-11-07 01:01:34 -0800 | [diff] [blame] | 2283 | kfree(server->mnt_path); |
| 2284 | kfree(server->hostname); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2285 | kfree(server); |
| 2286 | return s; |
| 2287 | } |
| 2288 | |
| 2289 | static void nfs4_kill_super(struct super_block *sb) |
| 2290 | { |
| 2291 | struct nfs_server *server = NFS_SB(sb); |
| 2292 | |
| 2293 | nfs_return_all_delegations(sb); |
| 2294 | kill_anon_super(sb); |
| 2295 | |
| 2296 | nfs4_renewd_prepare_shutdown(server); |
| 2297 | |
| 2298 | if (server->client != NULL && !IS_ERR(server->client)) |
| 2299 | rpc_shutdown_client(server->client); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2300 | |
| 2301 | destroy_nfsv4_state(server); |
| 2302 | |
Trond Myklebust | 967b928 | 2006-03-20 13:44:09 -0500 | [diff] [blame] | 2303 | rpciod_down(); |
| 2304 | |
Trond Myklebust | 01d0ae8 | 2006-03-20 13:44:48 -0500 | [diff] [blame] | 2305 | nfs_free_iostats(server->io_stats); |
Jesper Juhl | f99d49a | 2005-11-07 01:01:34 -0800 | [diff] [blame] | 2306 | kfree(server->hostname); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2307 | kfree(server); |
Trond Myklebust | 51d8fa6 | 2006-06-09 09:34:20 -0400 | [diff] [blame] | 2308 | nfs_release_automount_timer(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2309 | } |
| 2310 | |
| 2311 | static struct file_system_type nfs4_fs_type = { |
| 2312 | .owner = THIS_MODULE, |
| 2313 | .name = "nfs4", |
| 2314 | .get_sb = nfs4_get_sb, |
| 2315 | .kill_sb = nfs4_kill_super, |
| 2316 | .fs_flags = FS_ODD_RENAME|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, |
| 2317 | }; |
| 2318 | |
Trond Myklebust | a72b442 | 2006-01-03 09:55:41 +0100 | [diff] [blame] | 2319 | static const int nfs_set_port_min = 0; |
| 2320 | static const int nfs_set_port_max = 65535; |
| 2321 | static int param_set_port(const char *val, struct kernel_param *kp) |
| 2322 | { |
| 2323 | char *endp; |
| 2324 | int num = simple_strtol(val, &endp, 0); |
| 2325 | if (endp == val || *endp || num < nfs_set_port_min || num > nfs_set_port_max) |
| 2326 | return -EINVAL; |
| 2327 | *((int *)kp->arg) = num; |
| 2328 | return 0; |
| 2329 | } |
| 2330 | |
| 2331 | module_param_call(callback_tcpport, param_set_port, param_get_int, |
| 2332 | &nfs_callback_set_tcpport, 0644); |
| 2333 | |
Trond Myklebust | 58df095 | 2006-01-03 09:55:57 +0100 | [diff] [blame] | 2334 | static int param_set_idmap_timeout(const char *val, struct kernel_param *kp) |
| 2335 | { |
| 2336 | char *endp; |
| 2337 | int num = simple_strtol(val, &endp, 0); |
| 2338 | int jif = num * HZ; |
| 2339 | if (endp == val || *endp || num < 0 || jif < num) |
| 2340 | return -EINVAL; |
| 2341 | *((int *)kp->arg) = jif; |
| 2342 | return 0; |
| 2343 | } |
| 2344 | |
| 2345 | module_param_call(idmap_cache_timeout, param_set_idmap_timeout, param_get_int, |
| 2346 | &nfs_idmap_cache_timeout, 0644); |
| 2347 | |
Trond Myklebust | 55a9759 | 2006-06-09 09:34:19 -0400 | [diff] [blame] | 2348 | /* Constructs the SERVER-side path */ |
| 2349 | static inline char *nfs4_path(const struct dentry *dentry, char *buffer, ssize_t buflen) |
| 2350 | { |
| 2351 | return nfs_path(NFS_SB(dentry->d_sb)->mnt_path, dentry, buffer, buflen); |
| 2352 | } |
| 2353 | |
| 2354 | static inline char *nfs4_dup_path(const struct dentry *dentry) |
| 2355 | { |
| 2356 | char *page = (char *) __get_free_page(GFP_USER); |
| 2357 | char *path; |
| 2358 | |
| 2359 | path = nfs4_path(dentry, page, PAGE_SIZE); |
| 2360 | if (!IS_ERR(path)) { |
| 2361 | int len = PAGE_SIZE + page - path; |
| 2362 | char *tmp = path; |
| 2363 | |
| 2364 | path = kmalloc(len, GFP_KERNEL); |
| 2365 | if (path) |
| 2366 | memcpy(path, tmp, len); |
| 2367 | else |
| 2368 | path = ERR_PTR(-ENOMEM); |
| 2369 | } |
| 2370 | free_page((unsigned long)page); |
| 2371 | return path; |
| 2372 | } |
| 2373 | |
| 2374 | static struct super_block *nfs4_clone_client(struct nfs_server *server, struct nfs_clone_mount *data) |
| 2375 | { |
| 2376 | const struct dentry *dentry = data->dentry; |
| 2377 | struct nfs4_client *clp = server->nfs4_state; |
| 2378 | struct super_block *sb; |
| 2379 | |
| 2380 | server->mnt_path = nfs4_dup_path(dentry); |
| 2381 | if (IS_ERR(server->mnt_path)) { |
| 2382 | sb = (struct super_block *)server->mnt_path; |
| 2383 | goto err; |
| 2384 | } |
| 2385 | sb = sget(&nfs4_fs_type, nfs4_compare_super, nfs_set_super, server); |
| 2386 | if (IS_ERR(sb) || sb->s_root) |
| 2387 | goto free_path; |
| 2388 | nfs4_server_capabilities(server, &server->fh); |
| 2389 | |
| 2390 | down_write(&clp->cl_sem); |
| 2391 | atomic_inc(&clp->cl_count); |
| 2392 | list_add_tail(&server->nfs4_siblings, &clp->cl_superblocks); |
| 2393 | up_write(&clp->cl_sem); |
| 2394 | return sb; |
| 2395 | free_path: |
| 2396 | kfree(server->mnt_path); |
| 2397 | err: |
| 2398 | server->mnt_path = NULL; |
| 2399 | return sb; |
| 2400 | } |
| 2401 | |
| 2402 | static struct super_block *nfs_clone_nfs4_sb(struct file_system_type *fs_type, |
| 2403 | int flags, const char *dev_name, void *raw_data) |
| 2404 | { |
| 2405 | struct nfs_clone_mount *data = raw_data; |
| 2406 | return nfs_clone_generic_sb(data, nfs4_clone_client); |
| 2407 | } |
| 2408 | |
| 2409 | static struct file_system_type clone_nfs4_fs_type = { |
| 2410 | .owner = THIS_MODULE, |
| 2411 | .name = "nfs", |
| 2412 | .get_sb = nfs_clone_nfs4_sb, |
| 2413 | .kill_sb = nfs4_kill_super, |
| 2414 | .fs_flags = FS_ODD_RENAME|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, |
| 2415 | }; |
| 2416 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2417 | #define nfs4_init_once(nfsi) \ |
| 2418 | do { \ |
| 2419 | INIT_LIST_HEAD(&(nfsi)->open_states); \ |
| 2420 | nfsi->delegation = NULL; \ |
| 2421 | nfsi->delegation_state = 0; \ |
| 2422 | init_rwsem(&nfsi->rwsem); \ |
| 2423 | } while(0) |
Trond Myklebust | a72b442 | 2006-01-03 09:55:41 +0100 | [diff] [blame] | 2424 | |
| 2425 | static inline int register_nfs4fs(void) |
| 2426 | { |
| 2427 | int ret; |
| 2428 | |
| 2429 | ret = nfs_register_sysctl(); |
| 2430 | if (ret != 0) |
| 2431 | return ret; |
| 2432 | ret = register_filesystem(&nfs4_fs_type); |
| 2433 | if (ret != 0) |
| 2434 | nfs_unregister_sysctl(); |
| 2435 | return ret; |
| 2436 | } |
| 2437 | |
| 2438 | static inline void unregister_nfs4fs(void) |
| 2439 | { |
| 2440 | unregister_filesystem(&nfs4_fs_type); |
| 2441 | nfs_unregister_sysctl(); |
| 2442 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2443 | #else |
Trond Myklebust | 55a9759 | 2006-06-09 09:34:19 -0400 | [diff] [blame] | 2444 | #define nfs4_clone_client(a,b) ERR_PTR(-EINVAL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2445 | #define nfs4_init_once(nfsi) \ |
| 2446 | do { } while (0) |
| 2447 | #define register_nfs4fs() (0) |
| 2448 | #define unregister_nfs4fs() |
| 2449 | #endif |
| 2450 | |
Trond Myklebust | 55a9759 | 2006-06-09 09:34:19 -0400 | [diff] [blame] | 2451 | static inline char *nfs_devname(const struct vfsmount *mnt_parent, |
| 2452 | const struct dentry *dentry, |
| 2453 | char *buffer, ssize_t buflen) |
| 2454 | { |
| 2455 | return nfs_path(mnt_parent->mnt_devname, dentry, buffer, buflen); |
| 2456 | } |
| 2457 | |
| 2458 | /** |
| 2459 | * nfs_do_submount - set up mountpoint when crossing a filesystem boundary |
| 2460 | * @mnt_parent - mountpoint of parent directory |
| 2461 | * @dentry - parent directory |
| 2462 | * @fh - filehandle for new root dentry |
| 2463 | * @fattr - attributes for new root inode |
| 2464 | * |
| 2465 | */ |
| 2466 | struct vfsmount *nfs_do_submount(const struct vfsmount *mnt_parent, |
| 2467 | const struct dentry *dentry, struct nfs_fh *fh, |
| 2468 | struct nfs_fattr *fattr) |
| 2469 | { |
| 2470 | struct nfs_clone_mount mountdata = { |
| 2471 | .sb = mnt_parent->mnt_sb, |
| 2472 | .dentry = dentry, |
| 2473 | .fh = fh, |
| 2474 | .fattr = fattr, |
| 2475 | }; |
| 2476 | struct vfsmount *mnt = ERR_PTR(-ENOMEM); |
| 2477 | char *page = (char *) __get_free_page(GFP_USER); |
| 2478 | char *devname; |
| 2479 | |
| 2480 | dprintk("%s: submounting on %s/%s\n", __FUNCTION__, |
| 2481 | dentry->d_parent->d_name.name, |
| 2482 | dentry->d_name.name); |
| 2483 | if (page == NULL) |
| 2484 | goto out; |
| 2485 | devname = nfs_devname(mnt_parent, dentry, page, PAGE_SIZE); |
| 2486 | mnt = (struct vfsmount *)devname; |
| 2487 | if (IS_ERR(devname)) |
| 2488 | goto free_page; |
| 2489 | switch (NFS_SB(mnt_parent->mnt_sb)->rpc_ops->version) { |
| 2490 | case 2: |
| 2491 | case 3: |
| 2492 | mnt = vfs_kern_mount(&clone_nfs_fs_type, 0, devname, &mountdata); |
| 2493 | break; |
| 2494 | case 4: |
| 2495 | mnt = vfs_kern_mount(&clone_nfs4_fs_type, 0, devname, &mountdata); |
| 2496 | break; |
| 2497 | default: |
| 2498 | BUG(); |
| 2499 | } |
| 2500 | free_page: |
| 2501 | free_page((unsigned long)page); |
| 2502 | out: |
| 2503 | dprintk("%s: done\n", __FUNCTION__); |
| 2504 | return mnt; |
| 2505 | } |
| 2506 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2507 | extern int nfs_init_nfspagecache(void); |
| 2508 | extern void nfs_destroy_nfspagecache(void); |
| 2509 | extern int nfs_init_readpagecache(void); |
| 2510 | extern void nfs_destroy_readpagecache(void); |
| 2511 | extern int nfs_init_writepagecache(void); |
| 2512 | extern void nfs_destroy_writepagecache(void); |
| 2513 | #ifdef CONFIG_NFS_DIRECTIO |
| 2514 | extern int nfs_init_directcache(void); |
| 2515 | extern void nfs_destroy_directcache(void); |
| 2516 | #endif |
| 2517 | |
| 2518 | static kmem_cache_t * nfs_inode_cachep; |
| 2519 | |
| 2520 | static struct inode *nfs_alloc_inode(struct super_block *sb) |
| 2521 | { |
| 2522 | struct nfs_inode *nfsi; |
| 2523 | nfsi = (struct nfs_inode *)kmem_cache_alloc(nfs_inode_cachep, SLAB_KERNEL); |
| 2524 | if (!nfsi) |
| 2525 | return NULL; |
Chuck Lever | 5529680 | 2005-08-18 11:24:09 -0700 | [diff] [blame] | 2526 | nfsi->flags = 0UL; |
| 2527 | nfsi->cache_validity = 0UL; |
Steve Dickson | 223db12 | 2005-11-30 09:25:33 -0500 | [diff] [blame] | 2528 | nfsi->cache_change_attribute = jiffies; |
Trond Myklebust | 458818e | 2005-06-22 17:16:27 +0000 | [diff] [blame] | 2529 | #ifdef CONFIG_NFS_V3_ACL |
| 2530 | nfsi->acl_access = ERR_PTR(-EAGAIN); |
| 2531 | nfsi->acl_default = ERR_PTR(-EAGAIN); |
| 2532 | #endif |
J. Bruce Fields | e50a1c2 | 2005-06-22 17:16:23 +0000 | [diff] [blame] | 2533 | #ifdef CONFIG_NFS_V4 |
| 2534 | nfsi->nfs4_acl = NULL; |
| 2535 | #endif /* CONFIG_NFS_V4 */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2536 | return &nfsi->vfs_inode; |
| 2537 | } |
| 2538 | |
| 2539 | static void nfs_destroy_inode(struct inode *inode) |
| 2540 | { |
| 2541 | kmem_cache_free(nfs_inode_cachep, NFS_I(inode)); |
| 2542 | } |
| 2543 | |
| 2544 | static void init_once(void * foo, kmem_cache_t * cachep, unsigned long flags) |
| 2545 | { |
| 2546 | struct nfs_inode *nfsi = (struct nfs_inode *) foo; |
| 2547 | |
| 2548 | if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) == |
| 2549 | SLAB_CTOR_CONSTRUCTOR) { |
| 2550 | inode_init_once(&nfsi->vfs_inode); |
| 2551 | spin_lock_init(&nfsi->req_lock); |
| 2552 | INIT_LIST_HEAD(&nfsi->dirty); |
| 2553 | INIT_LIST_HEAD(&nfsi->commit); |
| 2554 | INIT_LIST_HEAD(&nfsi->open_files); |
| 2555 | INIT_RADIX_TREE(&nfsi->nfs_page_tree, GFP_ATOMIC); |
| 2556 | atomic_set(&nfsi->data_updates, 0); |
| 2557 | nfsi->ndirty = 0; |
| 2558 | nfsi->ncommit = 0; |
| 2559 | nfsi->npages = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2560 | nfs4_init_once(nfsi); |
| 2561 | } |
| 2562 | } |
| 2563 | |
Adrian Bunk | 75c96f8 | 2005-05-05 16:16:09 -0700 | [diff] [blame] | 2564 | static int nfs_init_inodecache(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2565 | { |
| 2566 | nfs_inode_cachep = kmem_cache_create("nfs_inode_cache", |
| 2567 | sizeof(struct nfs_inode), |
Paul Jackson | fffb60f | 2006-03-24 03:16:06 -0800 | [diff] [blame] | 2568 | 0, (SLAB_RECLAIM_ACCOUNT| |
| 2569 | SLAB_MEM_SPREAD), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2570 | init_once, NULL); |
| 2571 | if (nfs_inode_cachep == NULL) |
| 2572 | return -ENOMEM; |
| 2573 | |
| 2574 | return 0; |
| 2575 | } |
| 2576 | |
Adrian Bunk | 75c96f8 | 2005-05-05 16:16:09 -0700 | [diff] [blame] | 2577 | static void nfs_destroy_inodecache(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2578 | { |
| 2579 | if (kmem_cache_destroy(nfs_inode_cachep)) |
| 2580 | printk(KERN_INFO "nfs_inode_cache: not all structures were freed\n"); |
| 2581 | } |
| 2582 | |
| 2583 | /* |
| 2584 | * Initialize NFS |
| 2585 | */ |
| 2586 | static int __init init_nfs_fs(void) |
| 2587 | { |
| 2588 | int err; |
| 2589 | |
| 2590 | err = nfs_init_nfspagecache(); |
| 2591 | if (err) |
| 2592 | goto out4; |
| 2593 | |
| 2594 | err = nfs_init_inodecache(); |
| 2595 | if (err) |
| 2596 | goto out3; |
| 2597 | |
| 2598 | err = nfs_init_readpagecache(); |
| 2599 | if (err) |
| 2600 | goto out2; |
| 2601 | |
| 2602 | err = nfs_init_writepagecache(); |
| 2603 | if (err) |
| 2604 | goto out1; |
| 2605 | |
| 2606 | #ifdef CONFIG_NFS_DIRECTIO |
| 2607 | err = nfs_init_directcache(); |
| 2608 | if (err) |
| 2609 | goto out0; |
| 2610 | #endif |
| 2611 | |
| 2612 | #ifdef CONFIG_PROC_FS |
| 2613 | rpc_proc_register(&nfs_rpcstat); |
| 2614 | #endif |
| 2615 | err = register_filesystem(&nfs_fs_type); |
| 2616 | if (err) |
| 2617 | goto out; |
| 2618 | if ((err = register_nfs4fs()) != 0) |
| 2619 | goto out; |
| 2620 | return 0; |
| 2621 | out: |
| 2622 | #ifdef CONFIG_PROC_FS |
| 2623 | rpc_proc_unregister("nfs"); |
| 2624 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2625 | #ifdef CONFIG_NFS_DIRECTIO |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2626 | nfs_destroy_directcache(); |
Chuck Lever | 6b59a75 | 2005-11-30 18:08:19 -0500 | [diff] [blame] | 2627 | out0: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2628 | #endif |
Chuck Lever | 6b59a75 | 2005-11-30 18:08:19 -0500 | [diff] [blame] | 2629 | nfs_destroy_writepagecache(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2630 | out1: |
| 2631 | nfs_destroy_readpagecache(); |
| 2632 | out2: |
| 2633 | nfs_destroy_inodecache(); |
| 2634 | out3: |
| 2635 | nfs_destroy_nfspagecache(); |
| 2636 | out4: |
| 2637 | return err; |
| 2638 | } |
| 2639 | |
| 2640 | static void __exit exit_nfs_fs(void) |
| 2641 | { |
| 2642 | #ifdef CONFIG_NFS_DIRECTIO |
| 2643 | nfs_destroy_directcache(); |
| 2644 | #endif |
| 2645 | nfs_destroy_writepagecache(); |
| 2646 | nfs_destroy_readpagecache(); |
| 2647 | nfs_destroy_inodecache(); |
| 2648 | nfs_destroy_nfspagecache(); |
| 2649 | #ifdef CONFIG_PROC_FS |
| 2650 | rpc_proc_unregister("nfs"); |
| 2651 | #endif |
| 2652 | unregister_filesystem(&nfs_fs_type); |
| 2653 | unregister_nfs4fs(); |
| 2654 | } |
| 2655 | |
| 2656 | /* Not quite true; I just maintain it */ |
| 2657 | MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>"); |
| 2658 | MODULE_LICENSE("GPL"); |
| 2659 | |
| 2660 | module_init(init_nfs_fs) |
| 2661 | module_exit(exit_nfs_fs) |