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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 16 | #include <linux/module.h> |
| 17 | #include <linux/init.h> |
Alexey Dobriyan | e8edc6e | 2007-05-21 01:22:52 +0400 | [diff] [blame] | 18 | #include <linux/sched.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 19 | #include <linux/time.h> |
| 20 | #include <linux/kernel.h> |
| 21 | #include <linux/mm.h> |
| 22 | #include <linux/string.h> |
| 23 | #include <linux/stat.h> |
| 24 | #include <linux/errno.h> |
| 25 | #include <linux/unistd.h> |
| 26 | #include <linux/sunrpc/clnt.h> |
| 27 | #include <linux/sunrpc/stats.h> |
Chuck Lever | 4ece3a2 | 2006-03-20 13:44:22 -0500 | [diff] [blame] | 28 | #include <linux/sunrpc/metrics.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 29 | #include <linux/nfs_fs.h> |
| 30 | #include <linux/nfs_mount.h> |
| 31 | #include <linux/nfs4_mount.h> |
| 32 | #include <linux/lockd/bind.h> |
| 33 | #include <linux/smp_lock.h> |
| 34 | #include <linux/seq_file.h> |
| 35 | #include <linux/mount.h> |
| 36 | #include <linux/nfs_idmap.h> |
| 37 | #include <linux/vfs.h> |
Manoj Naik | 9cdb388 | 2006-06-09 09:34:28 -0400 | [diff] [blame] | 38 | #include <linux/inet.h> |
| 39 | #include <linux/nfs_xdr.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | |
| 41 | #include <asm/system.h> |
| 42 | #include <asm/uaccess.h> |
| 43 | |
Trond Myklebust | 4ce7971 | 2005-06-22 17:16:21 +0000 | [diff] [blame] | 44 | #include "nfs4_fs.h" |
Trond Myklebust | a72b442 | 2006-01-03 09:55:41 +0100 | [diff] [blame] | 45 | #include "callback.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 46 | #include "delegation.h" |
Chuck Lever | d9ef5a8 | 2006-03-20 13:44:13 -0500 | [diff] [blame] | 47 | #include "iostat.h" |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 48 | #include "internal.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | |
| 50 | #define NFSDBG_FACILITY NFSDBG_VFS |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 51 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | static void nfs_invalidate_inode(struct inode *); |
Trond Myklebust | 24aa1fe | 2005-12-03 15:20:07 -0500 | [diff] [blame] | 53 | static int nfs_update_inode(struct inode *, struct nfs_fattr *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 54 | |
Trond Myklebust | ada70d9 | 2005-06-22 17:16:22 +0000 | [diff] [blame] | 55 | static void nfs_zap_acl_cache(struct inode *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 56 | |
Christoph Lameter | e18b890 | 2006-12-06 20:33:20 -0800 | [diff] [blame] | 57 | static struct kmem_cache * nfs_inode_cachep; |
Andreas Gruenbacher | b7fa055 | 2005-06-22 17:16:27 +0000 | [diff] [blame] | 58 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 59 | static inline unsigned long |
| 60 | nfs_fattr_to_ino_t(struct nfs_fattr *fattr) |
| 61 | { |
| 62 | return nfs_fileid_to_ino_t(fattr->fileid); |
| 63 | } |
| 64 | |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 65 | int nfs_write_inode(struct inode *inode, int sync) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 66 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 67 | int ret; |
| 68 | |
Trond Myklebust | d30c834 | 2006-12-13 15:23:47 -0500 | [diff] [blame] | 69 | if (sync) { |
| 70 | ret = filemap_fdatawait(inode->i_mapping); |
| 71 | if (ret == 0) |
| 72 | ret = nfs_commit_inode(inode, FLUSH_SYNC); |
| 73 | } else |
| 74 | ret = nfs_commit_inode(inode, 0); |
| 75 | if (ret >= 0) |
| 76 | return 0; |
| 77 | __mark_inode_dirty(inode, I_DIRTY_DATASYNC); |
| 78 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 79 | } |
| 80 | |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 81 | void nfs_clear_inode(struct inode *inode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 82 | { |
Trond Myklebust | da6d503 | 2006-06-01 17:26:35 -0400 | [diff] [blame] | 83 | /* |
| 84 | * The following should never happen... |
| 85 | */ |
| 86 | BUG_ON(nfs_have_writebacks(inode)); |
Trond Myklebust | 1c3c07e | 2006-07-25 11:28:18 -0400 | [diff] [blame] | 87 | BUG_ON(!list_empty(&NFS_I(inode)->open_files)); |
Trond Myklebust | ada70d9 | 2005-06-22 17:16:22 +0000 | [diff] [blame] | 88 | nfs_zap_acl_cache(inode); |
Trond Myklebust | 1c3c07e | 2006-07-25 11:28:18 -0400 | [diff] [blame] | 89 | nfs_access_zap_cache(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 90 | } |
| 91 | |
Trond Myklebust | 29884df | 2005-12-13 16:13:54 -0500 | [diff] [blame] | 92 | /** |
| 93 | * nfs_sync_mapping - helper to flush all mmapped dirty data to disk |
| 94 | */ |
| 95 | int nfs_sync_mapping(struct address_space *mapping) |
| 96 | { |
| 97 | int ret; |
| 98 | |
| 99 | if (mapping->nrpages == 0) |
| 100 | return 0; |
| 101 | unmap_mapping_range(mapping, 0, 0, 0); |
OGAWA Hirofumi | 28fd129 | 2006-01-08 01:02:14 -0800 | [diff] [blame] | 102 | ret = filemap_write_and_wait(mapping); |
Trond Myklebust | 29884df | 2005-12-13 16:13:54 -0500 | [diff] [blame] | 103 | if (ret != 0) |
| 104 | goto out; |
| 105 | ret = nfs_wb_all(mapping->host); |
| 106 | out: |
| 107 | return ret; |
| 108 | } |
| 109 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 110 | /* |
| 111 | * Invalidate the local caches |
| 112 | */ |
Trond Myklebust | b37b03b | 2005-11-25 17:10:06 -0500 | [diff] [blame] | 113 | static void nfs_zap_caches_locked(struct inode *inode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 114 | { |
| 115 | struct nfs_inode *nfsi = NFS_I(inode); |
| 116 | int mode = inode->i_mode; |
| 117 | |
Chuck Lever | 91d5b47 | 2006-03-20 13:44:14 -0500 | [diff] [blame] | 118 | nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE); |
| 119 | |
Trond Myklebust | c7c2097 | 2007-09-28 19:22:40 -0400 | [diff] [blame^] | 120 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); |
| 121 | nfsi->attrtimeo_timestamp = jiffies; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 122 | |
| 123 | memset(NFS_COOKIEVERF(inode), 0, sizeof(NFS_COOKIEVERF(inode))); |
| 124 | if (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode)) |
Chuck Lever | 5529680 | 2005-08-18 11:24:09 -0700 | [diff] [blame] | 125 | 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] | 126 | else |
Chuck Lever | 5529680 | 2005-08-18 11:24:09 -0700 | [diff] [blame] | 127 | 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] | 128 | } |
Chuck Lever | dc59250 | 2005-08-18 11:24:12 -0700 | [diff] [blame] | 129 | |
Trond Myklebust | b37b03b | 2005-11-25 17:10:06 -0500 | [diff] [blame] | 130 | void nfs_zap_caches(struct inode *inode) |
| 131 | { |
| 132 | spin_lock(&inode->i_lock); |
| 133 | nfs_zap_caches_locked(inode); |
Chuck Lever | dc59250 | 2005-08-18 11:24:12 -0700 | [diff] [blame] | 134 | spin_unlock(&inode->i_lock); |
Trond Myklebust | ada70d9 | 2005-06-22 17:16:22 +0000 | [diff] [blame] | 135 | } |
| 136 | |
Trond Myklebust | cd9ae2b | 2006-10-19 23:28:40 -0700 | [diff] [blame] | 137 | void nfs_zap_mapping(struct inode *inode, struct address_space *mapping) |
| 138 | { |
| 139 | if (mapping->nrpages != 0) { |
| 140 | spin_lock(&inode->i_lock); |
| 141 | NFS_I(inode)->cache_validity |= NFS_INO_INVALID_DATA; |
| 142 | spin_unlock(&inode->i_lock); |
| 143 | } |
| 144 | } |
| 145 | |
Trond Myklebust | ada70d9 | 2005-06-22 17:16:22 +0000 | [diff] [blame] | 146 | static void nfs_zap_acl_cache(struct inode *inode) |
| 147 | { |
| 148 | void (*clear_acl_cache)(struct inode *); |
| 149 | |
| 150 | clear_acl_cache = NFS_PROTO(inode)->clear_acl_cache; |
| 151 | if (clear_acl_cache != NULL) |
| 152 | clear_acl_cache(inode); |
Chuck Lever | dc59250 | 2005-08-18 11:24:12 -0700 | [diff] [blame] | 153 | spin_lock(&inode->i_lock); |
Chuck Lever | 5529680 | 2005-08-18 11:24:09 -0700 | [diff] [blame] | 154 | NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_ACL; |
Chuck Lever | dc59250 | 2005-08-18 11:24:12 -0700 | [diff] [blame] | 155 | spin_unlock(&inode->i_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 156 | } |
| 157 | |
Trond Myklebust | c481299 | 2007-09-28 17:11:45 -0400 | [diff] [blame] | 158 | void nfs_invalidate_atime(struct inode *inode) |
| 159 | { |
| 160 | spin_lock(&inode->i_lock); |
| 161 | NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATIME; |
| 162 | spin_unlock(&inode->i_lock); |
| 163 | } |
| 164 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 165 | /* |
Trond Myklebust | b37b03b | 2005-11-25 17:10:06 -0500 | [diff] [blame] | 166 | * Invalidate, but do not unhash, the inode. |
| 167 | * NB: must be called with inode->i_lock held! |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 168 | */ |
Trond Myklebust | b37b03b | 2005-11-25 17:10:06 -0500 | [diff] [blame] | 169 | static void nfs_invalidate_inode(struct inode *inode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 170 | { |
Trond Myklebust | b37b03b | 2005-11-25 17:10:06 -0500 | [diff] [blame] | 171 | set_bit(NFS_INO_STALE, &NFS_FLAGS(inode)); |
| 172 | nfs_zap_caches_locked(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 173 | } |
| 174 | |
| 175 | struct nfs_find_desc { |
| 176 | struct nfs_fh *fh; |
| 177 | struct nfs_fattr *fattr; |
| 178 | }; |
| 179 | |
| 180 | /* |
| 181 | * In NFSv3 we can have 64bit inode numbers. In order to support |
| 182 | * this, and re-exported directories (also seen in NFSv2) |
| 183 | * we are forced to allow 2 different inodes to have the same |
| 184 | * i_ino. |
| 185 | */ |
| 186 | static int |
| 187 | nfs_find_actor(struct inode *inode, void *opaque) |
| 188 | { |
| 189 | struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque; |
| 190 | struct nfs_fh *fh = desc->fh; |
| 191 | struct nfs_fattr *fattr = desc->fattr; |
| 192 | |
| 193 | if (NFS_FILEID(inode) != fattr->fileid) |
| 194 | return 0; |
| 195 | if (nfs_compare_fh(NFS_FH(inode), fh)) |
| 196 | return 0; |
| 197 | if (is_bad_inode(inode) || NFS_STALE(inode)) |
| 198 | return 0; |
| 199 | return 1; |
| 200 | } |
| 201 | |
| 202 | static int |
| 203 | nfs_init_locked(struct inode *inode, void *opaque) |
| 204 | { |
| 205 | struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque; |
| 206 | struct nfs_fattr *fattr = desc->fattr; |
| 207 | |
| 208 | NFS_FILEID(inode) = fattr->fileid; |
| 209 | nfs_copy_fh(NFS_FH(inode), desc->fh); |
| 210 | return 0; |
| 211 | } |
| 212 | |
| 213 | /* Don't use READDIRPLUS on directories that we believe are too large */ |
| 214 | #define NFS_LIMIT_READDIRPLUS (8*PAGE_SIZE) |
| 215 | |
| 216 | /* |
| 217 | * This is our front-end to iget that looks up inodes by file handle |
| 218 | * instead of inode number. |
| 219 | */ |
| 220 | struct inode * |
| 221 | nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr) |
| 222 | { |
| 223 | struct nfs_find_desc desc = { |
| 224 | .fh = fh, |
| 225 | .fattr = fattr |
| 226 | }; |
Trond Myklebust | 03f28e3 | 2006-03-20 13:44:48 -0500 | [diff] [blame] | 227 | struct inode *inode = ERR_PTR(-ENOENT); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 228 | unsigned long hash; |
| 229 | |
| 230 | if ((fattr->valid & NFS_ATTR_FATTR) == 0) |
| 231 | goto out_no_inode; |
| 232 | |
| 233 | if (!fattr->nlink) { |
| 234 | printk("NFS: Buggy server - nlink == 0!\n"); |
| 235 | goto out_no_inode; |
| 236 | } |
| 237 | |
| 238 | hash = nfs_fattr_to_ino_t(fattr); |
| 239 | |
Trond Myklebust | 03f28e3 | 2006-03-20 13:44:48 -0500 | [diff] [blame] | 240 | inode = iget5_locked(sb, hash, nfs_find_actor, nfs_init_locked, &desc); |
| 241 | if (inode == NULL) { |
| 242 | inode = ERR_PTR(-ENOMEM); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 243 | goto out_no_inode; |
Trond Myklebust | 03f28e3 | 2006-03-20 13:44:48 -0500 | [diff] [blame] | 244 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 245 | |
| 246 | if (inode->i_state & I_NEW) { |
| 247 | struct nfs_inode *nfsi = NFS_I(inode); |
Trond Myklebust | b0c4fdd | 2007-02-05 14:44:22 -0800 | [diff] [blame] | 248 | unsigned long now = jiffies; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 249 | |
| 250 | /* We set i_ino for the few things that still rely on it, |
| 251 | * such as stat(2) */ |
| 252 | inode->i_ino = hash; |
| 253 | |
| 254 | /* We can't support update_atime(), since the server will reset it */ |
| 255 | inode->i_flags |= S_NOATIME|S_NOCMTIME; |
| 256 | inode->i_mode = fattr->mode; |
| 257 | /* Why so? Because we want revalidate for devices/FIFOs, and |
| 258 | * that's precisely what we have in nfs_file_inode_operations. |
| 259 | */ |
David Howells | 8fa5c00 | 2006-08-22 20:06:12 -0400 | [diff] [blame] | 260 | inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->file_inode_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 261 | if (S_ISREG(inode->i_mode)) { |
| 262 | inode->i_fop = &nfs_file_operations; |
| 263 | inode->i_data.a_ops = &nfs_file_aops; |
| 264 | inode->i_data.backing_dev_info = &NFS_SB(sb)->backing_dev_info; |
| 265 | } else if (S_ISDIR(inode->i_mode)) { |
David Howells | 8fa5c00 | 2006-08-22 20:06:12 -0400 | [diff] [blame] | 266 | inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->dir_inode_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 267 | inode->i_fop = &nfs_dir_operations; |
| 268 | if (nfs_server_capable(inode, NFS_CAP_READDIRPLUS) |
| 269 | && fattr->size <= NFS_LIMIT_READDIRPLUS) |
Chuck Lever | 412d582 | 2005-08-18 11:24:11 -0700 | [diff] [blame] | 270 | set_bit(NFS_INO_ADVISE_RDPLUS, &NFS_FLAGS(inode)); |
Trond Myklebust | 55a9759 | 2006-06-09 09:34:19 -0400 | [diff] [blame] | 271 | /* Deal with crossing mountpoints */ |
| 272 | if (!nfs_fsid_equal(&NFS_SB(sb)->fsid, &fattr->fsid)) { |
Manoj Naik | 6b97fd3 | 2006-06-09 09:34:29 -0400 | [diff] [blame] | 273 | if (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) |
| 274 | inode->i_op = &nfs_referral_inode_operations; |
| 275 | else |
| 276 | inode->i_op = &nfs_mountpoint_inode_operations; |
Trond Myklebust | 55a9759 | 2006-06-09 09:34:19 -0400 | [diff] [blame] | 277 | inode->i_fop = NULL; |
| 278 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 279 | } else if (S_ISLNK(inode->i_mode)) |
| 280 | inode->i_op = &nfs_symlink_inode_operations; |
| 281 | else |
| 282 | init_special_inode(inode, inode->i_mode, fattr->rdev); |
| 283 | |
Trond Myklebust | 3380114 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 284 | nfsi->read_cache_jiffies = fattr->time_start; |
Trond Myklebust | b0c4fdd | 2007-02-05 14:44:22 -0800 | [diff] [blame] | 285 | nfsi->last_updated = now; |
| 286 | nfsi->cache_change_attribute = now; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 287 | inode->i_atime = fattr->atime; |
| 288 | inode->i_mtime = fattr->mtime; |
| 289 | inode->i_ctime = fattr->ctime; |
| 290 | if (fattr->valid & NFS_ATTR_FATTR_V4) |
| 291 | nfsi->change_attr = fattr->change_attr; |
| 292 | inode->i_size = nfs_size_to_loff_t(fattr->size); |
| 293 | inode->i_nlink = fattr->nlink; |
| 294 | inode->i_uid = fattr->uid; |
| 295 | inode->i_gid = fattr->gid; |
| 296 | if (fattr->valid & (NFS_ATTR_FATTR_V3 | NFS_ATTR_FATTR_V4)) { |
| 297 | /* |
| 298 | * report the blocks in 512byte units |
| 299 | */ |
| 300 | inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 301 | } else { |
| 302 | inode->i_blocks = fattr->du.nfs2.blocks; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 303 | } |
| 304 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); |
Trond Myklebust | b0c4fdd | 2007-02-05 14:44:22 -0800 | [diff] [blame] | 305 | nfsi->attrtimeo_timestamp = now; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 306 | memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf)); |
Trond Myklebust | 1c3c07e | 2006-07-25 11:28:18 -0400 | [diff] [blame] | 307 | nfsi->access_cache = RB_ROOT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 308 | |
| 309 | unlock_new_inode(inode); |
| 310 | } else |
| 311 | nfs_refresh_inode(inode, fattr); |
| 312 | dprintk("NFS: nfs_fhget(%s/%Ld ct=%d)\n", |
| 313 | inode->i_sb->s_id, |
| 314 | (long long)NFS_FILEID(inode), |
| 315 | atomic_read(&inode->i_count)); |
| 316 | |
| 317 | out: |
| 318 | return inode; |
| 319 | |
| 320 | out_no_inode: |
Trond Myklebust | 03f28e3 | 2006-03-20 13:44:48 -0500 | [diff] [blame] | 321 | dprintk("nfs_fhget: iget failed with error %ld\n", PTR_ERR(inode)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 322 | goto out; |
| 323 | } |
| 324 | |
| 325 | #define NFS_VALID_ATTRS (ATTR_MODE|ATTR_UID|ATTR_GID|ATTR_SIZE|ATTR_ATIME|ATTR_ATIME_SET|ATTR_MTIME|ATTR_MTIME_SET) |
| 326 | |
| 327 | int |
| 328 | nfs_setattr(struct dentry *dentry, struct iattr *attr) |
| 329 | { |
| 330 | struct inode *inode = dentry->d_inode; |
| 331 | struct nfs_fattr fattr; |
| 332 | int error; |
| 333 | |
Chuck Lever | 91d5b47 | 2006-03-20 13:44:14 -0500 | [diff] [blame] | 334 | nfs_inc_stats(inode, NFSIOS_VFSSETATTR); |
| 335 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 336 | if (attr->ia_valid & ATTR_SIZE) { |
| 337 | if (!S_ISREG(inode->i_mode) || attr->ia_size == i_size_read(inode)) |
| 338 | attr->ia_valid &= ~ATTR_SIZE; |
| 339 | } |
| 340 | |
| 341 | /* Optimization: if the end result is no change, don't RPC */ |
| 342 | attr->ia_valid &= NFS_VALID_ATTRS; |
| 343 | if (attr->ia_valid == 0) |
| 344 | return 0; |
| 345 | |
| 346 | lock_kernel(); |
Trond Myklebust | 755c1e2 | 2006-03-20 13:44:06 -0500 | [diff] [blame] | 347 | /* Write all dirty data */ |
Trond Myklebust | e1552e1 | 2007-04-14 19:07:28 -0400 | [diff] [blame] | 348 | if (S_ISREG(inode->i_mode)) { |
| 349 | filemap_write_and_wait(inode->i_mapping); |
| 350 | nfs_wb_all(inode); |
| 351 | } |
Trond Myklebust | 642ac54 | 2005-10-18 14:20:19 -0700 | [diff] [blame] | 352 | /* |
| 353 | * Return any delegations if we're going to change ACLs |
| 354 | */ |
| 355 | if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) |
| 356 | nfs_inode_return_delegation(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 357 | error = NFS_PROTO(inode)->setattr(dentry, &fattr, attr); |
Trond Myklebust | 65e4308 | 2005-08-16 11:49:44 -0400 | [diff] [blame] | 358 | if (error == 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 359 | nfs_refresh_inode(inode, &fattr); |
Trond Myklebust | 65e4308 | 2005-08-16 11:49:44 -0400 | [diff] [blame] | 360 | unlock_kernel(); |
| 361 | return error; |
| 362 | } |
| 363 | |
| 364 | /** |
| 365 | * nfs_setattr_update_inode - Update inode metadata after a setattr call. |
| 366 | * @inode: pointer to struct inode |
| 367 | * @attr: pointer to struct iattr |
| 368 | * |
| 369 | * Note: we do this in the *proc.c in order to ensure that |
| 370 | * it works for things like exclusive creates too. |
| 371 | */ |
| 372 | void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr) |
| 373 | { |
| 374 | if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 375 | if ((attr->ia_valid & ATTR_MODE) != 0) { |
Trond Myklebust | 65e4308 | 2005-08-16 11:49:44 -0400 | [diff] [blame] | 376 | int mode = attr->ia_mode & S_IALLUGO; |
| 377 | mode |= inode->i_mode & ~S_IALLUGO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 378 | inode->i_mode = mode; |
| 379 | } |
| 380 | if ((attr->ia_valid & ATTR_UID) != 0) |
| 381 | inode->i_uid = attr->ia_uid; |
| 382 | if ((attr->ia_valid & ATTR_GID) != 0) |
| 383 | inode->i_gid = attr->ia_gid; |
Chuck Lever | dc59250 | 2005-08-18 11:24:12 -0700 | [diff] [blame] | 384 | spin_lock(&inode->i_lock); |
Chuck Lever | 5529680 | 2005-08-18 11:24:09 -0700 | [diff] [blame] | 385 | 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] | 386 | spin_unlock(&inode->i_lock); |
Trond Myklebust | 65e4308 | 2005-08-16 11:49:44 -0400 | [diff] [blame] | 387 | } |
| 388 | if ((attr->ia_valid & ATTR_SIZE) != 0) { |
Chuck Lever | 91d5b47 | 2006-03-20 13:44:14 -0500 | [diff] [blame] | 389 | nfs_inc_stats(inode, NFSIOS_SETATTRTRUNC); |
Trond Myklebust | 65e4308 | 2005-08-16 11:49:44 -0400 | [diff] [blame] | 390 | inode->i_size = attr->ia_size; |
| 391 | vmtruncate(inode, attr->ia_size); |
| 392 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 393 | } |
| 394 | |
Chuck Lever | 412d582 | 2005-08-18 11:24:11 -0700 | [diff] [blame] | 395 | static int nfs_wait_schedule(void *word) |
| 396 | { |
| 397 | if (signal_pending(current)) |
| 398 | return -ERESTARTSYS; |
| 399 | schedule(); |
| 400 | return 0; |
| 401 | } |
| 402 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 403 | /* |
| 404 | * Wait for the inode to get unlocked. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 405 | */ |
Chuck Lever | 412d582 | 2005-08-18 11:24:11 -0700 | [diff] [blame] | 406 | static int nfs_wait_on_inode(struct inode *inode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 407 | { |
| 408 | struct rpc_clnt *clnt = NFS_CLIENT(inode); |
| 409 | struct nfs_inode *nfsi = NFS_I(inode); |
Chuck Lever | 412d582 | 2005-08-18 11:24:11 -0700 | [diff] [blame] | 410 | sigset_t oldmask; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 411 | int error; |
Chuck Lever | 412d582 | 2005-08-18 11:24:11 -0700 | [diff] [blame] | 412 | |
Chuck Lever | 412d582 | 2005-08-18 11:24:11 -0700 | [diff] [blame] | 413 | rpc_clnt_sigmask(clnt, &oldmask); |
| 414 | error = wait_on_bit_lock(&nfsi->flags, NFS_INO_REVALIDATING, |
| 415 | nfs_wait_schedule, TASK_INTERRUPTIBLE); |
| 416 | rpc_clnt_sigunmask(clnt, &oldmask); |
Chuck Lever | 412d582 | 2005-08-18 11:24:11 -0700 | [diff] [blame] | 417 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 418 | return error; |
| 419 | } |
| 420 | |
Chuck Lever | 412d582 | 2005-08-18 11:24:11 -0700 | [diff] [blame] | 421 | static void nfs_wake_up_inode(struct inode *inode) |
| 422 | { |
| 423 | struct nfs_inode *nfsi = NFS_I(inode); |
| 424 | |
| 425 | clear_bit(NFS_INO_REVALIDATING, &nfsi->flags); |
| 426 | smp_mb__after_clear_bit(); |
| 427 | wake_up_bit(&nfsi->flags, NFS_INO_REVALIDATING); |
| 428 | } |
| 429 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 430 | int nfs_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat) |
| 431 | { |
| 432 | struct inode *inode = dentry->d_inode; |
Chuck Lever | 5529680 | 2005-08-18 11:24:09 -0700 | [diff] [blame] | 433 | int need_atime = NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATIME; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 434 | int err; |
| 435 | |
Trond Myklebust | 70b9ecb | 2006-01-03 09:55:34 +0100 | [diff] [blame] | 436 | /* Flush out writes to the server in order to update c/mtime */ |
Trond Myklebust | 6347073 | 2007-03-16 13:38:28 -0800 | [diff] [blame] | 437 | if (S_ISREG(inode->i_mode)) |
Trond Myklebust | ed90ef5 | 2007-07-20 13:13:28 -0400 | [diff] [blame] | 438 | nfs_wb_nocommit(inode); |
Christoph Hellwig | fc33a7b | 2006-01-09 20:52:17 -0800 | [diff] [blame] | 439 | |
| 440 | /* |
| 441 | * We may force a getattr if the user cares about atime. |
| 442 | * |
| 443 | * Note that we only have to check the vfsmount flags here: |
| 444 | * - NFS always sets S_NOATIME by so checking it would give a |
| 445 | * bogus result |
| 446 | * - NFS never sets MS_NOATIME or MS_NODIRATIME so there is |
| 447 | * no point in checking those. |
| 448 | */ |
| 449 | if ((mnt->mnt_flags & MNT_NOATIME) || |
| 450 | ((mnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 451 | need_atime = 0; |
Christoph Hellwig | fc33a7b | 2006-01-09 20:52:17 -0800 | [diff] [blame] | 452 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 453 | if (need_atime) |
| 454 | err = __nfs_revalidate_inode(NFS_SERVER(inode), inode); |
| 455 | else |
| 456 | err = nfs_revalidate_inode(NFS_SERVER(inode), inode); |
Peter Staubach | 4e769b9 | 2007-08-03 15:07:10 -0400 | [diff] [blame] | 457 | if (!err) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 458 | generic_fillattr(inode, stat); |
Peter Staubach | 4e769b9 | 2007-08-03 15:07:10 -0400 | [diff] [blame] | 459 | stat->ino = NFS_FILEID(inode); |
| 460 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 461 | return err; |
| 462 | } |
| 463 | |
Trond Myklebust | b92dccf | 2006-03-20 13:44:03 -0500 | [diff] [blame] | 464 | 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] | 465 | { |
| 466 | struct nfs_open_context *ctx; |
| 467 | |
Panagiotis Issaris | f52720c | 2006-09-27 01:49:39 -0700 | [diff] [blame] | 468 | ctx = kmalloc(sizeof(*ctx), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 469 | if (ctx != NULL) { |
Trond Myklebust | 88be9f9 | 2007-06-05 10:42:27 -0400 | [diff] [blame] | 470 | ctx->path.dentry = dget(dentry); |
| 471 | ctx->path.mnt = mntget(mnt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 472 | ctx->cred = get_rpccred(cred); |
| 473 | ctx->state = NULL; |
| 474 | ctx->lockowner = current->files; |
| 475 | ctx->error = 0; |
Olivier Galibert | 00a9264 | 2005-06-22 17:16:29 +0000 | [diff] [blame] | 476 | ctx->dir_cookie = 0; |
Trond Myklebust | 5e11934 | 2007-07-26 12:06:17 -0400 | [diff] [blame] | 477 | atomic_set(&ctx->count, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 478 | } |
| 479 | return ctx; |
| 480 | } |
| 481 | |
| 482 | struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx) |
| 483 | { |
| 484 | if (ctx != NULL) |
Trond Myklebust | 5e11934 | 2007-07-26 12:06:17 -0400 | [diff] [blame] | 485 | atomic_inc(&ctx->count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 486 | return ctx; |
| 487 | } |
| 488 | |
Trond Myklebust | 5e11934 | 2007-07-26 12:06:17 -0400 | [diff] [blame] | 489 | void put_nfs_open_context(struct nfs_open_context *ctx) |
Trond Myklebust | 3bec63d | 2007-06-17 16:02:44 -0400 | [diff] [blame] | 490 | { |
Trond Myklebust | 5e11934 | 2007-07-26 12:06:17 -0400 | [diff] [blame] | 491 | struct inode *inode = ctx->path.dentry->d_inode; |
Trond Myklebust | 3bec63d | 2007-06-17 16:02:44 -0400 | [diff] [blame] | 492 | |
Trond Myklebust | 5e11934 | 2007-07-26 12:06:17 -0400 | [diff] [blame] | 493 | if (!atomic_dec_and_lock(&ctx->count, &inode->i_lock)) |
| 494 | return; |
| 495 | list_del(&ctx->list); |
| 496 | spin_unlock(&inode->i_lock); |
Trond Myklebust | 3bec63d | 2007-06-17 16:02:44 -0400 | [diff] [blame] | 497 | if (ctx->state != NULL) |
| 498 | nfs4_close_state(&ctx->path, ctx->state, ctx->mode); |
| 499 | if (ctx->cred != NULL) |
| 500 | put_rpccred(ctx->cred); |
| 501 | dput(ctx->path.dentry); |
| 502 | mntput(ctx->path.mnt); |
| 503 | kfree(ctx); |
| 504 | } |
| 505 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 506 | /* |
| 507 | * Ensure that mmap has a recent RPC credential for use when writing out |
| 508 | * shared pages |
| 509 | */ |
Trond Myklebust | b92dccf | 2006-03-20 13:44:03 -0500 | [diff] [blame] | 510 | 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] | 511 | { |
Josef "Jeff" Sipek | 01cce93 | 2006-12-08 02:36:40 -0800 | [diff] [blame] | 512 | struct inode *inode = filp->f_path.dentry->d_inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 513 | struct nfs_inode *nfsi = NFS_I(inode); |
| 514 | |
| 515 | filp->private_data = get_nfs_open_context(ctx); |
| 516 | spin_lock(&inode->i_lock); |
| 517 | list_add(&ctx->list, &nfsi->open_files); |
| 518 | spin_unlock(&inode->i_lock); |
| 519 | } |
| 520 | |
Trond Myklebust | d530838 | 2005-11-04 15:33:38 -0500 | [diff] [blame] | 521 | /* |
| 522 | * Given an inode, search for an open context with the desired characteristics |
| 523 | */ |
| 524 | 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] | 525 | { |
| 526 | struct nfs_inode *nfsi = NFS_I(inode); |
| 527 | struct nfs_open_context *pos, *ctx = NULL; |
| 528 | |
| 529 | spin_lock(&inode->i_lock); |
| 530 | list_for_each_entry(pos, &nfsi->open_files, list) { |
Trond Myklebust | d530838 | 2005-11-04 15:33:38 -0500 | [diff] [blame] | 531 | if (cred != NULL && pos->cred != cred) |
| 532 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 533 | if ((pos->mode & mode) == mode) { |
| 534 | ctx = get_nfs_open_context(pos); |
| 535 | break; |
| 536 | } |
| 537 | } |
| 538 | spin_unlock(&inode->i_lock); |
| 539 | return ctx; |
| 540 | } |
| 541 | |
Trond Myklebust | b92dccf | 2006-03-20 13:44:03 -0500 | [diff] [blame] | 542 | static void nfs_file_clear_open_context(struct file *filp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 543 | { |
Josef "Jeff" Sipek | 01cce93 | 2006-12-08 02:36:40 -0800 | [diff] [blame] | 544 | struct inode *inode = filp->f_path.dentry->d_inode; |
Trond Myklebust | cd3758e | 2007-08-10 17:44:32 -0400 | [diff] [blame] | 545 | struct nfs_open_context *ctx = nfs_file_open_context(filp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 546 | |
| 547 | if (ctx) { |
| 548 | filp->private_data = NULL; |
| 549 | spin_lock(&inode->i_lock); |
| 550 | list_move_tail(&ctx->list, &NFS_I(inode)->open_files); |
| 551 | spin_unlock(&inode->i_lock); |
| 552 | put_nfs_open_context(ctx); |
| 553 | } |
| 554 | } |
| 555 | |
| 556 | /* |
| 557 | * These allocate and release file read/write context information. |
| 558 | */ |
| 559 | int nfs_open(struct inode *inode, struct file *filp) |
| 560 | { |
| 561 | struct nfs_open_context *ctx; |
| 562 | struct rpc_cred *cred; |
| 563 | |
| 564 | cred = rpcauth_lookupcred(NFS_CLIENT(inode)->cl_auth, 0); |
| 565 | if (IS_ERR(cred)) |
| 566 | return PTR_ERR(cred); |
Josef "Jeff" Sipek | 01cce93 | 2006-12-08 02:36:40 -0800 | [diff] [blame] | 567 | ctx = alloc_nfs_open_context(filp->f_path.mnt, filp->f_path.dentry, cred); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 568 | put_rpccred(cred); |
| 569 | if (ctx == NULL) |
| 570 | return -ENOMEM; |
| 571 | ctx->mode = filp->f_mode; |
| 572 | nfs_file_set_open_context(filp, ctx); |
| 573 | put_nfs_open_context(ctx); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 574 | return 0; |
| 575 | } |
| 576 | |
| 577 | int nfs_release(struct inode *inode, struct file *filp) |
| 578 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 579 | nfs_file_clear_open_context(filp); |
| 580 | return 0; |
| 581 | } |
| 582 | |
| 583 | /* |
| 584 | * This function is called whenever some part of NFS notices that |
| 585 | * the cached attributes have to be refreshed. |
| 586 | */ |
| 587 | int |
| 588 | __nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) |
| 589 | { |
| 590 | int status = -ESTALE; |
| 591 | struct nfs_fattr fattr; |
| 592 | struct nfs_inode *nfsi = NFS_I(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 593 | |
| 594 | dfprintk(PAGECACHE, "NFS: revalidating (%s/%Ld)\n", |
| 595 | inode->i_sb->s_id, (long long)NFS_FILEID(inode)); |
| 596 | |
Trond Myklebust | 1842bfb | 2006-05-25 01:41:01 -0400 | [diff] [blame] | 597 | nfs_inc_stats(inode, NFSIOS_INODEREVALIDATE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 598 | lock_kernel(); |
Chuck Lever | 85233a7 | 2006-10-19 23:28:42 -0700 | [diff] [blame] | 599 | if (is_bad_inode(inode)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 600 | goto out_nowait; |
| 601 | if (NFS_STALE(inode)) |
| 602 | goto out_nowait; |
| 603 | |
Chuck Lever | 412d582 | 2005-08-18 11:24:11 -0700 | [diff] [blame] | 604 | status = nfs_wait_on_inode(inode); |
| 605 | if (status < 0) |
| 606 | goto out; |
Trond Myklebust | 7fdc49c | 2007-09-28 19:11:33 -0400 | [diff] [blame] | 607 | |
| 608 | status = -ESTALE; |
| 609 | if (NFS_STALE(inode)) |
| 610 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 611 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 612 | status = NFS_PROTO(inode)->getattr(server, NFS_FH(inode), &fattr); |
| 613 | if (status != 0) { |
| 614 | dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) getattr failed, error=%d\n", |
| 615 | inode->i_sb->s_id, |
| 616 | (long long)NFS_FILEID(inode), status); |
| 617 | if (status == -ESTALE) { |
| 618 | nfs_zap_caches(inode); |
| 619 | if (!S_ISDIR(inode->i_mode)) |
Chuck Lever | 412d582 | 2005-08-18 11:24:11 -0700 | [diff] [blame] | 620 | set_bit(NFS_INO_STALE, &NFS_FLAGS(inode)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 621 | } |
| 622 | goto out; |
| 623 | } |
| 624 | |
Trond Myklebust | 3380114 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 625 | spin_lock(&inode->i_lock); |
Trond Myklebust | 24aa1fe | 2005-12-03 15:20:07 -0500 | [diff] [blame] | 626 | status = nfs_update_inode(inode, &fattr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 627 | if (status) { |
Trond Myklebust | 3380114 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 628 | spin_unlock(&inode->i_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 629 | dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) refresh failed, error=%d\n", |
| 630 | inode->i_sb->s_id, |
| 631 | (long long)NFS_FILEID(inode), status); |
| 632 | goto out; |
| 633 | } |
Chuck Lever | dc59250 | 2005-08-18 11:24:12 -0700 | [diff] [blame] | 634 | spin_unlock(&inode->i_lock); |
Chuck Lever | 5529680 | 2005-08-18 11:24:09 -0700 | [diff] [blame] | 635 | |
Trond Myklebust | 24aa1fe | 2005-12-03 15:20:07 -0500 | [diff] [blame] | 636 | if (nfsi->cache_validity & NFS_INO_INVALID_ACL) |
Trond Myklebust | ada70d9 | 2005-06-22 17:16:22 +0000 | [diff] [blame] | 637 | nfs_zap_acl_cache(inode); |
Chuck Lever | 5529680 | 2005-08-18 11:24:09 -0700 | [diff] [blame] | 638 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 639 | dfprintk(PAGECACHE, "NFS: (%s/%Ld) revalidation complete\n", |
| 640 | inode->i_sb->s_id, |
| 641 | (long long)NFS_FILEID(inode)); |
| 642 | |
Chuck Lever | 412d582 | 2005-08-18 11:24:11 -0700 | [diff] [blame] | 643 | out: |
| 644 | nfs_wake_up_inode(inode); |
| 645 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 646 | out_nowait: |
| 647 | unlock_kernel(); |
| 648 | return status; |
| 649 | } |
| 650 | |
| 651 | int nfs_attribute_timeout(struct inode *inode) |
| 652 | { |
| 653 | struct nfs_inode *nfsi = NFS_I(inode); |
| 654 | |
| 655 | if (nfs_have_delegation(inode, FMODE_READ)) |
| 656 | return 0; |
Fabio Olive Leite | c7e1596 | 2007-07-26 22:59:00 -0300 | [diff] [blame] | 657 | return !time_in_range(jiffies, nfsi->read_cache_jiffies, nfsi->read_cache_jiffies + nfsi->attrtimeo); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 658 | } |
| 659 | |
| 660 | /** |
| 661 | * nfs_revalidate_inode - Revalidate the inode attributes |
| 662 | * @server - pointer to nfs_server struct |
| 663 | * @inode - pointer to inode struct |
| 664 | * |
| 665 | * Updates inode attribute information by retrieving the data from the server. |
| 666 | */ |
| 667 | int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) |
| 668 | { |
Trond Myklebust | 44b1187 | 2006-05-25 01:40:59 -0400 | [diff] [blame] | 669 | if (!(NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATTR) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 670 | && !nfs_attribute_timeout(inode)) |
| 671 | return NFS_STALE(inode) ? -ESTALE : 0; |
| 672 | return __nfs_revalidate_inode(server, inode); |
| 673 | } |
| 674 | |
Trond Myklebust | 717d44e | 2007-01-24 11:54:55 -0800 | [diff] [blame] | 675 | static int nfs_invalidate_mapping_nolock(struct inode *inode, struct address_space *mapping) |
| 676 | { |
| 677 | struct nfs_inode *nfsi = NFS_I(inode); |
| 678 | |
| 679 | if (mapping->nrpages != 0) { |
| 680 | int ret = invalidate_inode_pages2(mapping); |
| 681 | if (ret < 0) |
| 682 | return ret; |
| 683 | } |
| 684 | spin_lock(&inode->i_lock); |
| 685 | nfsi->cache_validity &= ~NFS_INO_INVALID_DATA; |
Trond Myklebust | 2f78e43 | 2007-09-30 15:31:19 -0400 | [diff] [blame] | 686 | if (S_ISDIR(inode->i_mode)) |
Trond Myklebust | 717d44e | 2007-01-24 11:54:55 -0800 | [diff] [blame] | 687 | memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf)); |
Trond Myklebust | 717d44e | 2007-01-24 11:54:55 -0800 | [diff] [blame] | 688 | spin_unlock(&inode->i_lock); |
| 689 | nfs_inc_stats(inode, NFSIOS_DATAINVALIDATE); |
| 690 | dfprintk(PAGECACHE, "NFS: (%s/%Ld) data cache invalidated\n", |
| 691 | inode->i_sb->s_id, (long long)NFS_FILEID(inode)); |
| 692 | return 0; |
| 693 | } |
| 694 | |
| 695 | static int nfs_invalidate_mapping(struct inode *inode, struct address_space *mapping) |
| 696 | { |
| 697 | int ret = 0; |
| 698 | |
| 699 | mutex_lock(&inode->i_mutex); |
| 700 | if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_DATA) { |
| 701 | ret = nfs_sync_mapping(mapping); |
| 702 | if (ret == 0) |
| 703 | ret = nfs_invalidate_mapping_nolock(inode, mapping); |
| 704 | } |
| 705 | mutex_unlock(&inode->i_mutex); |
| 706 | return ret; |
| 707 | } |
| 708 | |
| 709 | /** |
| 710 | * nfs_revalidate_mapping_nolock - Revalidate the pagecache |
| 711 | * @inode - pointer to host inode |
| 712 | * @mapping - pointer to mapping |
| 713 | */ |
| 714 | int nfs_revalidate_mapping_nolock(struct inode *inode, struct address_space *mapping) |
| 715 | { |
| 716 | struct nfs_inode *nfsi = NFS_I(inode); |
| 717 | int ret = 0; |
| 718 | |
| 719 | if ((nfsi->cache_validity & NFS_INO_REVAL_PAGECACHE) |
| 720 | || nfs_attribute_timeout(inode) || NFS_STALE(inode)) { |
| 721 | ret = __nfs_revalidate_inode(NFS_SERVER(inode), inode); |
| 722 | if (ret < 0) |
| 723 | goto out; |
| 724 | } |
| 725 | if (nfsi->cache_validity & NFS_INO_INVALID_DATA) |
| 726 | ret = nfs_invalidate_mapping_nolock(inode, mapping); |
| 727 | out: |
| 728 | return ret; |
| 729 | } |
| 730 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 731 | /** |
Trond Myklebust | 7d52e86 | 2005-06-22 17:16:30 +0000 | [diff] [blame] | 732 | * nfs_revalidate_mapping - Revalidate the pagecache |
| 733 | * @inode - pointer to host inode |
| 734 | * @mapping - pointer to mapping |
Trond Myklebust | 717d44e | 2007-01-24 11:54:55 -0800 | [diff] [blame] | 735 | * |
| 736 | * This version of the function will take the inode->i_mutex and attempt to |
| 737 | * flush out all dirty data if it needs to invalidate the page cache. |
Trond Myklebust | 7d52e86 | 2005-06-22 17:16:30 +0000 | [diff] [blame] | 738 | */ |
Trond Myklebust | 44b1187 | 2006-05-25 01:40:59 -0400 | [diff] [blame] | 739 | int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping) |
Trond Myklebust | 7d52e86 | 2005-06-22 17:16:30 +0000 | [diff] [blame] | 740 | { |
| 741 | struct nfs_inode *nfsi = NFS_I(inode); |
Trond Myklebust | 44b1187 | 2006-05-25 01:40:59 -0400 | [diff] [blame] | 742 | int ret = 0; |
| 743 | |
Trond Myklebust | 44b1187 | 2006-05-25 01:40:59 -0400 | [diff] [blame] | 744 | if ((nfsi->cache_validity & NFS_INO_REVAL_PAGECACHE) |
Trond Myklebust | 717d44e | 2007-01-24 11:54:55 -0800 | [diff] [blame] | 745 | || nfs_attribute_timeout(inode) || NFS_STALE(inode)) { |
Trond Myklebust | 44b1187 | 2006-05-25 01:40:59 -0400 | [diff] [blame] | 746 | ret = __nfs_revalidate_inode(NFS_SERVER(inode), inode); |
Trond Myklebust | 717d44e | 2007-01-24 11:54:55 -0800 | [diff] [blame] | 747 | if (ret < 0) |
| 748 | goto out; |
Trond Myklebust | 7d52e86 | 2005-06-22 17:16:30 +0000 | [diff] [blame] | 749 | } |
Trond Myklebust | 717d44e | 2007-01-24 11:54:55 -0800 | [diff] [blame] | 750 | if (nfsi->cache_validity & NFS_INO_INVALID_DATA) |
| 751 | ret = nfs_invalidate_mapping(inode, mapping); |
Trond Myklebust | cd9ae2b | 2006-10-19 23:28:40 -0700 | [diff] [blame] | 752 | out: |
Trond Myklebust | 44b1187 | 2006-05-25 01:40:59 -0400 | [diff] [blame] | 753 | return ret; |
Trond Myklebust | 7d52e86 | 2005-06-22 17:16:30 +0000 | [diff] [blame] | 754 | } |
| 755 | |
Trond Myklebust | a895b4a | 2006-01-03 09:55:40 +0100 | [diff] [blame] | 756 | static void nfs_wcc_update_inode(struct inode *inode, struct nfs_fattr *fattr) |
| 757 | { |
| 758 | struct nfs_inode *nfsi = NFS_I(inode); |
| 759 | |
Trond Myklebust | 70ca885 | 2007-09-30 15:21:24 -0400 | [diff] [blame] | 760 | if ((fattr->valid & NFS_ATTR_WCC_V4) != 0 && |
| 761 | nfsi->change_attr == fattr->pre_change_attr) { |
| 762 | nfsi->change_attr = fattr->change_attr; |
| 763 | if (S_ISDIR(inode->i_mode)) |
| 764 | nfsi->cache_validity |= NFS_INO_INVALID_DATA; |
| 765 | } |
Trond Myklebust | a895b4a | 2006-01-03 09:55:40 +0100 | [diff] [blame] | 766 | /* If we have atomic WCC data, we may update some attributes */ |
| 767 | if ((fattr->valid & NFS_ATTR_WCC) != 0) { |
Trond Myklebust | 17cadc9 | 2007-09-27 10:07:31 -0400 | [diff] [blame] | 768 | if (timespec_equal(&inode->i_ctime, &fattr->pre_ctime)) |
Trond Myklebust | a895b4a | 2006-01-03 09:55:40 +0100 | [diff] [blame] | 769 | memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime)); |
Trond Myklebust | a895b4a | 2006-01-03 09:55:40 +0100 | [diff] [blame] | 770 | if (timespec_equal(&inode->i_mtime, &fattr->pre_mtime)) { |
| 771 | memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime)); |
Trond Myklebust | e323ea4 | 2007-09-30 17:03:25 -0400 | [diff] [blame] | 772 | if (S_ISDIR(inode->i_mode)) |
| 773 | nfsi->cache_validity |= NFS_INO_INVALID_DATA; |
Trond Myklebust | a895b4a | 2006-01-03 09:55:40 +0100 | [diff] [blame] | 774 | } |
Trond Myklebust | 17cadc9 | 2007-09-27 10:07:31 -0400 | [diff] [blame] | 775 | if (inode->i_size == fattr->pre_size && nfsi->npages == 0) |
Trond Myklebust | a895b4a | 2006-01-03 09:55:40 +0100 | [diff] [blame] | 776 | inode->i_size = fattr->size; |
Trond Myklebust | a895b4a | 2006-01-03 09:55:40 +0100 | [diff] [blame] | 777 | } |
| 778 | } |
| 779 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 780 | /** |
Trond Myklebust | 3380114 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 781 | * nfs_check_inode_attributes - verify consistency of the inode attribute cache |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 782 | * @inode - pointer to inode |
| 783 | * @fattr - updated attributes |
| 784 | * |
| 785 | * Verifies the attribute cache. If we have just changed the attributes, |
| 786 | * so that fattr carries weak cache consistency data, then it may |
| 787 | * also update the ctime/mtime/change_attribute. |
| 788 | */ |
Trond Myklebust | 3380114 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 789 | 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] | 790 | { |
| 791 | struct nfs_inode *nfsi = NFS_I(inode); |
| 792 | loff_t cur_size, new_isize; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 793 | |
Chuck Lever | dc59250 | 2005-08-18 11:24:12 -0700 | [diff] [blame] | 794 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 795 | /* Has the inode gone and changed behind our back? */ |
| 796 | if (nfsi->fileid != fattr->fileid |
Chuck Lever | dc59250 | 2005-08-18 11:24:12 -0700 | [diff] [blame] | 797 | || (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 798 | return -EIO; |
Chuck Lever | dc59250 | 2005-08-18 11:24:12 -0700 | [diff] [blame] | 799 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 800 | |
Trond Myklebust | ca62b9c | 2006-03-20 13:44:07 -0500 | [diff] [blame] | 801 | /* Do atomic weak cache consistency updates */ |
| 802 | nfs_wcc_update_inode(inode, fattr); |
| 803 | |
Trond Myklebust | 9d1e923 | 2006-05-25 01:40:46 -0400 | [diff] [blame] | 804 | if ((fattr->valid & NFS_ATTR_FATTR_V4) != 0 && |
Trond Myklebust | f1bb0b9 | 2006-05-25 01:40:55 -0400 | [diff] [blame] | 805 | nfsi->change_attr != fattr->change_attr) |
| 806 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 807 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 808 | /* Verify a few of the more important attributes */ |
Trond Myklebust | f1bb0b9 | 2006-05-25 01:40:55 -0400 | [diff] [blame] | 809 | if (!timespec_equal(&inode->i_mtime, &fattr->mtime)) |
| 810 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; |
Trond Myklebust | ca62b9c | 2006-03-20 13:44:07 -0500 | [diff] [blame] | 811 | |
| 812 | cur_size = i_size_read(inode); |
| 813 | new_isize = nfs_size_to_loff_t(fattr->size); |
Trond Myklebust | fb374d2 | 2006-03-20 13:44:08 -0500 | [diff] [blame] | 814 | if (cur_size != new_isize && nfsi->npages == 0) |
| 815 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 816 | |
| 817 | /* Have any file permissions changed? */ |
| 818 | if ((inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO) |
| 819 | || inode->i_uid != fattr->uid |
| 820 | || inode->i_gid != fattr->gid) |
Chuck Lever | 5529680 | 2005-08-18 11:24:09 -0700 | [diff] [blame] | 821 | 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] | 822 | |
| 823 | /* Has the link count changed? */ |
| 824 | if (inode->i_nlink != fattr->nlink) |
Chuck Lever | 5529680 | 2005-08-18 11:24:09 -0700 | [diff] [blame] | 825 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 826 | |
| 827 | if (!timespec_equal(&inode->i_atime, &fattr->atime)) |
Chuck Lever | 5529680 | 2005-08-18 11:24:09 -0700 | [diff] [blame] | 828 | nfsi->cache_validity |= NFS_INO_INVALID_ATIME; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 829 | |
Trond Myklebust | 3380114 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 830 | nfsi->read_cache_jiffies = fattr->time_start; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 831 | return 0; |
| 832 | } |
| 833 | |
Trond Myklebust | 3380114 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 834 | /** |
| 835 | * nfs_refresh_inode - try to update the inode attribute cache |
| 836 | * @inode - pointer to inode |
| 837 | * @fattr - updated attributes |
| 838 | * |
| 839 | * Check that an RPC call that returned attributes has not overlapped with |
| 840 | * other recent updates of the inode metadata, then decide whether it is |
| 841 | * safe to do a full update of the inode attributes, or whether just to |
| 842 | * call nfs_check_inode_attributes. |
| 843 | */ |
| 844 | int nfs_refresh_inode(struct inode *inode, struct nfs_fattr *fattr) |
| 845 | { |
| 846 | struct nfs_inode *nfsi = NFS_I(inode); |
| 847 | int status; |
| 848 | |
| 849 | if ((fattr->valid & NFS_ATTR_FATTR) == 0) |
| 850 | return 0; |
| 851 | spin_lock(&inode->i_lock); |
Trond Myklebust | 3380114 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 852 | if (time_after(fattr->time_start, nfsi->last_updated)) |
Trond Myklebust | 24aa1fe | 2005-12-03 15:20:07 -0500 | [diff] [blame] | 853 | status = nfs_update_inode(inode, fattr); |
Trond Myklebust | 3380114 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 854 | else |
| 855 | status = nfs_check_inode_attributes(inode, fattr); |
| 856 | |
| 857 | spin_unlock(&inode->i_lock); |
| 858 | return status; |
| 859 | } |
| 860 | |
Trond Myklebust | decf491 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 861 | /** |
| 862 | * nfs_post_op_update_inode - try to update the inode attribute cache |
| 863 | * @inode - pointer to inode |
| 864 | * @fattr - updated attributes |
| 865 | * |
| 866 | * After an operation that has changed the inode metadata, mark the |
| 867 | * attribute cache as being invalid, then try to update it. |
Chuck Lever | f551e44 | 2006-09-20 14:33:04 -0400 | [diff] [blame] | 868 | * |
| 869 | * NB: if the server didn't return any post op attributes, this |
| 870 | * function will force the retrieval of attributes before the next |
| 871 | * NFS request. Thus it should be used only for operations that |
| 872 | * are expected to change one or more attributes, to avoid |
| 873 | * unnecessary NFS requests and trips through nfs_update_inode(). |
Trond Myklebust | decf491 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 874 | */ |
| 875 | int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr) |
| 876 | { |
| 877 | struct nfs_inode *nfsi = NFS_I(inode); |
Trond Myklebust | decf491 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 878 | |
Trond Myklebust | 7668fdb | 2007-10-01 09:59:15 -0400 | [diff] [blame] | 879 | if (fattr->valid & NFS_ATTR_FATTR) |
| 880 | return nfs_refresh_inode(inode, fattr); |
| 881 | |
| 882 | spin_lock(&inode->i_lock); |
| 883 | nfsi->cache_validity |= NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; |
| 884 | spin_unlock(&inode->i_lock); |
| 885 | return 0; |
Trond Myklebust | decf491 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 886 | } |
| 887 | |
Trond Myklebust | 70ca885 | 2007-09-30 15:21:24 -0400 | [diff] [blame] | 888 | /** |
| 889 | * nfs_post_op_update_inode_force_wcc - try to update the inode attribute cache |
| 890 | * @inode - pointer to inode |
| 891 | * @fattr - updated attributes |
| 892 | * |
| 893 | * After an operation that has changed the inode metadata, mark the |
| 894 | * attribute cache as being invalid, then try to update it. Fake up |
| 895 | * weak cache consistency data, if none exist. |
| 896 | * |
| 897 | * This function is mainly designed to be used by the ->write_done() functions. |
| 898 | */ |
| 899 | int nfs_post_op_update_inode_force_wcc(struct inode *inode, struct nfs_fattr *fattr) |
| 900 | { |
| 901 | if ((fattr->valid & NFS_ATTR_FATTR_V4) != 0 && |
| 902 | (fattr->valid & NFS_ATTR_WCC_V4) == 0) { |
| 903 | fattr->pre_change_attr = NFS_I(inode)->change_attr; |
| 904 | fattr->valid |= NFS_ATTR_WCC_V4; |
| 905 | } |
| 906 | if ((fattr->valid & NFS_ATTR_FATTR) != 0 && |
| 907 | (fattr->valid & NFS_ATTR_WCC) == 0) { |
| 908 | memcpy(&fattr->pre_ctime, &inode->i_ctime, sizeof(fattr->pre_ctime)); |
| 909 | memcpy(&fattr->pre_mtime, &inode->i_mtime, sizeof(fattr->pre_mtime)); |
| 910 | fattr->pre_size = inode->i_size; |
| 911 | fattr->valid |= NFS_ATTR_WCC; |
| 912 | } |
| 913 | return nfs_post_op_update_inode(inode, fattr); |
| 914 | } |
| 915 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 916 | /* |
| 917 | * Many nfs protocol calls return the new file attributes after |
| 918 | * an operation. Here we update the inode to reflect the state |
| 919 | * of the server's inode. |
| 920 | * |
| 921 | * This is a bit tricky because we have to make sure all dirty pages |
| 922 | * have been sent off to the server before calling invalidate_inode_pages. |
| 923 | * To make sure no other process adds more write requests while we try |
| 924 | * our best to flush them, we make them sleep during the attribute refresh. |
| 925 | * |
| 926 | * A very similar scenario holds for the dir cache. |
| 927 | */ |
Trond Myklebust | 24aa1fe | 2005-12-03 15:20:07 -0500 | [diff] [blame] | 928 | static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 929 | { |
Trond Myklebust | 8b4bdcf | 2006-06-09 09:34:19 -0400 | [diff] [blame] | 930 | struct nfs_server *server; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 931 | struct nfs_inode *nfsi = NFS_I(inode); |
Trond Myklebust | 951a143 | 2005-06-22 17:16:30 +0000 | [diff] [blame] | 932 | loff_t cur_isize, new_isize; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 933 | unsigned int invalid = 0; |
Trond Myklebust | 3e7d950 | 2007-02-05 14:26:28 -0800 | [diff] [blame] | 934 | unsigned long now = jiffies; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 935 | |
| 936 | dfprintk(VFS, "NFS: %s(%s/%ld ct=%d info=0x%x)\n", |
| 937 | __FUNCTION__, inode->i_sb->s_id, inode->i_ino, |
| 938 | atomic_read(&inode->i_count), fattr->valid); |
| 939 | |
Chuck Lever | 325cfed | 2005-11-30 18:08:55 -0500 | [diff] [blame] | 940 | if (nfsi->fileid != fattr->fileid) |
| 941 | goto out_fileid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 942 | |
| 943 | /* |
| 944 | * Make sure the inode's type hasn't changed. |
| 945 | */ |
Trond Myklebust | 3380114 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 946 | if ((inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 947 | goto out_changed; |
| 948 | |
Trond Myklebust | 8b4bdcf | 2006-06-09 09:34:19 -0400 | [diff] [blame] | 949 | server = NFS_SERVER(inode); |
Trond Myklebust | a035686 | 2007-06-05 13:26:15 -0400 | [diff] [blame] | 950 | /* Update the fsid? */ |
| 951 | if (S_ISDIR(inode->i_mode) |
Trond Myklebust | 8b4bdcf | 2006-06-09 09:34:19 -0400 | [diff] [blame] | 952 | && !nfs_fsid_equal(&server->fsid, &fattr->fsid)) |
| 953 | server->fsid = fattr->fsid; |
| 954 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 955 | /* |
| 956 | * Update the read time so we don't revalidate too often. |
| 957 | */ |
Trond Myklebust | 3380114 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 958 | nfsi->read_cache_jiffies = fattr->time_start; |
Trond Myklebust | 3e7d950 | 2007-02-05 14:26:28 -0800 | [diff] [blame] | 959 | |
Trond Myklebust | f2115dc | 2007-08-15 12:49:17 -0400 | [diff] [blame] | 960 | nfsi->cache_validity &= ~(NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ATIME |
| 961 | | NFS_INO_REVAL_PAGECACHE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 962 | |
Trond Myklebust | a895b4a | 2006-01-03 09:55:40 +0100 | [diff] [blame] | 963 | /* Do atomic weak cache consistency updates */ |
| 964 | nfs_wcc_update_inode(inode, fattr); |
| 965 | |
Trond Myklebust | 47aabaa | 2007-09-27 15:57:24 -0400 | [diff] [blame] | 966 | /* More cache consistency checks */ |
| 967 | if (!(fattr->valid & NFS_ATTR_FATTR_V4)) { |
| 968 | /* NFSv2/v3: Check if the mtime agrees */ |
| 969 | if (!timespec_equal(&inode->i_mtime, &fattr->mtime)) { |
| 970 | dprintk("NFS: mtime change on server for file %s/%ld\n", |
| 971 | inode->i_sb->s_id, inode->i_ino); |
| 972 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA; |
| 973 | nfsi->cache_change_attribute = now; |
| 974 | } |
| 975 | /* If ctime has changed we should definitely clear access+acl caches */ |
Trond Myklebust | 12b373e | 2007-10-01 09:56:59 -0400 | [diff] [blame] | 976 | if (!timespec_equal(&inode->i_ctime, &fattr->ctime)) |
Trond Myklebust | 47aabaa | 2007-09-27 15:57:24 -0400 | [diff] [blame] | 977 | invalid |= NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
Trond Myklebust | 47aabaa | 2007-09-27 15:57:24 -0400 | [diff] [blame] | 978 | } else if (nfsi->change_attr != fattr->change_attr) { |
| 979 | dprintk("NFS: change_attr change on server for file %s/%ld\n", |
| 980 | inode->i_sb->s_id, inode->i_ino); |
| 981 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
| 982 | nfsi->cache_change_attribute = now; |
| 983 | } |
| 984 | |
Trond Myklebust | 951a143 | 2005-06-22 17:16:30 +0000 | [diff] [blame] | 985 | /* Check if our cached file size is stale */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 986 | new_isize = nfs_size_to_loff_t(fattr->size); |
| 987 | cur_isize = i_size_read(inode); |
Trond Myklebust | 951a143 | 2005-06-22 17:16:30 +0000 | [diff] [blame] | 988 | if (new_isize != cur_isize) { |
Trond Myklebust | b64e8a5 | 2007-09-30 15:13:17 -0400 | [diff] [blame] | 989 | /* Do we perhaps have any outstanding writes, or has |
| 990 | * the file grown beyond our last write? */ |
| 991 | if (nfsi->npages == 0 || new_isize > cur_isize) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 992 | inode->i_size = new_isize; |
| 993 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA; |
| 994 | } |
Trond Myklebust | 951a143 | 2005-06-22 17:16:30 +0000 | [diff] [blame] | 995 | dprintk("NFS: isize change on server for file %s/%ld\n", |
| 996 | inode->i_sb->s_id, inode->i_ino); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 997 | } |
| 998 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 999 | |
Trond Myklebust | 47aabaa | 2007-09-27 15:57:24 -0400 | [diff] [blame] | 1000 | memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime)); |
| 1001 | memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1002 | memcpy(&inode->i_atime, &fattr->atime, sizeof(inode->i_atime)); |
Trond Myklebust | 47aabaa | 2007-09-27 15:57:24 -0400 | [diff] [blame] | 1003 | nfsi->change_attr = fattr->change_attr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1004 | |
| 1005 | if ((inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO) || |
| 1006 | inode->i_uid != fattr->uid || |
| 1007 | inode->i_gid != fattr->gid) |
Trond Myklebust | ada70d9 | 2005-06-22 17:16:22 +0000 | [diff] [blame] | 1008 | 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] | 1009 | |
| 1010 | inode->i_mode = fattr->mode; |
| 1011 | inode->i_nlink = fattr->nlink; |
| 1012 | inode->i_uid = fattr->uid; |
| 1013 | inode->i_gid = fattr->gid; |
| 1014 | |
| 1015 | if (fattr->valid & (NFS_ATTR_FATTR_V3 | NFS_ATTR_FATTR_V4)) { |
| 1016 | /* |
| 1017 | * report the blocks in 512byte units |
| 1018 | */ |
| 1019 | inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1020 | } else { |
| 1021 | inode->i_blocks = fattr->du.nfs2.blocks; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1022 | } |
| 1023 | |
| 1024 | /* Update attrtimeo value if we're out of the unstable period */ |
| 1025 | if (invalid & NFS_INO_INVALID_ATTR) { |
Chuck Lever | 91d5b47 | 2006-03-20 13:44:14 -0500 | [diff] [blame] | 1026 | nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1027 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); |
Trond Myklebust | 3e7d950 | 2007-02-05 14:26:28 -0800 | [diff] [blame] | 1028 | nfsi->attrtimeo_timestamp = now; |
Trond Myklebust | 6d2b296 | 2007-10-01 18:57:50 -0400 | [diff] [blame] | 1029 | nfsi->last_updated = now; |
| 1030 | } else { |
| 1031 | if (!time_in_range(now, nfsi->attrtimeo_timestamp, nfsi->attrtimeo_timestamp + nfsi->attrtimeo)) { |
| 1032 | if ((nfsi->attrtimeo <<= 1) > NFS_MAXATTRTIMEO(inode)) |
| 1033 | nfsi->attrtimeo = NFS_MAXATTRTIMEO(inode); |
| 1034 | nfsi->attrtimeo_timestamp = now; |
| 1035 | } |
| 1036 | /* |
| 1037 | * Avoid jiffy wraparound issues with nfsi->last_updated |
| 1038 | */ |
| 1039 | if (!time_in_range(nfsi->last_updated, nfsi->read_cache_jiffies, now)) |
| 1040 | nfsi->last_updated = nfsi->read_cache_jiffies; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1041 | } |
Trond Myklebust | f2115dc | 2007-08-15 12:49:17 -0400 | [diff] [blame] | 1042 | invalid &= ~NFS_INO_INVALID_ATTR; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1043 | /* Don't invalidate the data if we were to blame */ |
| 1044 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) |
| 1045 | || S_ISLNK(inode->i_mode))) |
| 1046 | invalid &= ~NFS_INO_INVALID_DATA; |
Trond Myklebust | 412c77c | 2007-07-03 16:10:55 -0400 | [diff] [blame] | 1047 | if (!nfs_have_delegation(inode, FMODE_READ) || |
| 1048 | (nfsi->cache_validity & NFS_INO_REVAL_FORCED)) |
Chuck Lever | 5529680 | 2005-08-18 11:24:09 -0700 | [diff] [blame] | 1049 | nfsi->cache_validity |= invalid; |
Trond Myklebust | 412c77c | 2007-07-03 16:10:55 -0400 | [diff] [blame] | 1050 | nfsi->cache_validity &= ~NFS_INO_REVAL_FORCED; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1051 | |
| 1052 | return 0; |
| 1053 | out_changed: |
| 1054 | /* |
| 1055 | * Big trouble! The inode has become a different object. |
| 1056 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1057 | printk(KERN_DEBUG "%s: inode %ld mode changed, %07o to %07o\n", |
| 1058 | __FUNCTION__, inode->i_ino, inode->i_mode, fattr->mode); |
Trond Myklebust | b37b03b | 2005-11-25 17:10:06 -0500 | [diff] [blame] | 1059 | out_err: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1060 | /* |
| 1061 | * No need to worry about unhashing the dentry, as the |
| 1062 | * lookup validation will know that the inode is bad. |
| 1063 | * (But we fall through to invalidate the caches.) |
| 1064 | */ |
| 1065 | nfs_invalidate_inode(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1066 | return -ESTALE; |
Chuck Lever | 325cfed | 2005-11-30 18:08:55 -0500 | [diff] [blame] | 1067 | |
| 1068 | out_fileid: |
| 1069 | printk(KERN_ERR "NFS: server %s error: fileid changed\n" |
| 1070 | "fsid %s: expected fileid 0x%Lx, got 0x%Lx\n", |
David Howells | 54ceac4 | 2006-08-22 20:06:13 -0400 | [diff] [blame] | 1071 | NFS_SERVER(inode)->nfs_client->cl_hostname, inode->i_sb->s_id, |
Chuck Lever | 325cfed | 2005-11-30 18:08:55 -0500 | [diff] [blame] | 1072 | (long long)nfsi->fileid, (long long)fattr->fileid); |
| 1073 | goto out_err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1074 | } |
| 1075 | |
Trond Myklebust | 55a9759 | 2006-06-09 09:34:19 -0400 | [diff] [blame] | 1076 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1077 | #ifdef CONFIG_NFS_V4 |
| 1078 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1079 | /* |
| 1080 | * Clean out any remaining NFSv4 state that might be left over due |
| 1081 | * to open() calls that passed nfs_atomic_lookup, but failed to call |
| 1082 | * nfs_open(). |
| 1083 | */ |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 1084 | void nfs4_clear_inode(struct inode *inode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1085 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1086 | /* If we are holding a delegation, return it! */ |
Trond Myklebust | cae7a07 | 2005-10-18 14:20:19 -0700 | [diff] [blame] | 1087 | nfs_inode_return_delegation(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1088 | /* First call standard NFS clear_inode() code */ |
| 1089 | nfs_clear_inode(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1090 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1091 | #endif |
| 1092 | |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 1093 | struct inode *nfs_alloc_inode(struct super_block *sb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1094 | { |
| 1095 | struct nfs_inode *nfsi; |
Christoph Lameter | e94b176 | 2006-12-06 20:33:17 -0800 | [diff] [blame] | 1096 | nfsi = (struct nfs_inode *)kmem_cache_alloc(nfs_inode_cachep, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1097 | if (!nfsi) |
| 1098 | return NULL; |
Chuck Lever | 5529680 | 2005-08-18 11:24:09 -0700 | [diff] [blame] | 1099 | nfsi->flags = 0UL; |
| 1100 | nfsi->cache_validity = 0UL; |
Trond Myklebust | 458818e | 2005-06-22 17:16:27 +0000 | [diff] [blame] | 1101 | #ifdef CONFIG_NFS_V3_ACL |
| 1102 | nfsi->acl_access = ERR_PTR(-EAGAIN); |
| 1103 | nfsi->acl_default = ERR_PTR(-EAGAIN); |
| 1104 | #endif |
J. Bruce Fields | e50a1c2 | 2005-06-22 17:16:23 +0000 | [diff] [blame] | 1105 | #ifdef CONFIG_NFS_V4 |
| 1106 | nfsi->nfs4_acl = NULL; |
| 1107 | #endif /* CONFIG_NFS_V4 */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1108 | return &nfsi->vfs_inode; |
| 1109 | } |
| 1110 | |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 1111 | void nfs_destroy_inode(struct inode *inode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1112 | { |
| 1113 | kmem_cache_free(nfs_inode_cachep, NFS_I(inode)); |
| 1114 | } |
| 1115 | |
Andrew Morton | d75d541 | 2006-06-25 02:41:26 -0700 | [diff] [blame] | 1116 | static inline void nfs4_init_once(struct nfs_inode *nfsi) |
| 1117 | { |
| 1118 | #ifdef CONFIG_NFS_V4 |
| 1119 | INIT_LIST_HEAD(&nfsi->open_states); |
| 1120 | nfsi->delegation = NULL; |
| 1121 | nfsi->delegation_state = 0; |
| 1122 | init_rwsem(&nfsi->rwsem); |
| 1123 | #endif |
| 1124 | } |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 1125 | |
Christoph Lameter | e18b890 | 2006-12-06 20:33:20 -0800 | [diff] [blame] | 1126 | static void init_once(void * foo, struct kmem_cache * cachep, unsigned long flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1127 | { |
| 1128 | struct nfs_inode *nfsi = (struct nfs_inode *) foo; |
| 1129 | |
Christoph Lameter | a35afb8 | 2007-05-16 22:10:57 -0700 | [diff] [blame] | 1130 | inode_init_once(&nfsi->vfs_inode); |
Christoph Lameter | a35afb8 | 2007-05-16 22:10:57 -0700 | [diff] [blame] | 1131 | INIT_LIST_HEAD(&nfsi->open_files); |
| 1132 | INIT_LIST_HEAD(&nfsi->access_cache_entry_lru); |
| 1133 | INIT_LIST_HEAD(&nfsi->access_cache_inode_lru); |
| 1134 | INIT_RADIX_TREE(&nfsi->nfs_page_tree, GFP_ATOMIC); |
Christoph Lameter | a35afb8 | 2007-05-16 22:10:57 -0700 | [diff] [blame] | 1135 | nfsi->ncommit = 0; |
| 1136 | nfsi->npages = 0; |
| 1137 | nfs4_init_once(nfsi); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1138 | } |
Paul Mundt | 20c2df8 | 2007-07-20 10:11:58 +0900 | [diff] [blame] | 1139 | |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 1140 | static int __init nfs_init_inodecache(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1141 | { |
| 1142 | nfs_inode_cachep = kmem_cache_create("nfs_inode_cache", |
| 1143 | sizeof(struct nfs_inode), |
Paul Jackson | fffb60f | 2006-03-24 03:16:06 -0800 | [diff] [blame] | 1144 | 0, (SLAB_RECLAIM_ACCOUNT| |
| 1145 | SLAB_MEM_SPREAD), |
Paul Mundt | 20c2df8 | 2007-07-20 10:11:58 +0900 | [diff] [blame] | 1146 | init_once); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1147 | if (nfs_inode_cachep == NULL) |
| 1148 | return -ENOMEM; |
| 1149 | |
| 1150 | return 0; |
| 1151 | } |
| 1152 | |
David Brownell | 266bee8 | 2006-06-27 12:59:15 -0700 | [diff] [blame] | 1153 | static void nfs_destroy_inodecache(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1154 | { |
Alexey Dobriyan | 1a1d92c | 2006-09-27 01:49:40 -0700 | [diff] [blame] | 1155 | kmem_cache_destroy(nfs_inode_cachep); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1156 | } |
| 1157 | |
| 1158 | /* |
| 1159 | * Initialize NFS |
| 1160 | */ |
| 1161 | static int __init init_nfs_fs(void) |
| 1162 | { |
| 1163 | int err; |
| 1164 | |
David Howells | 6aaca56 | 2006-08-22 20:06:13 -0400 | [diff] [blame] | 1165 | err = nfs_fs_proc_init(); |
| 1166 | if (err) |
| 1167 | goto out5; |
| 1168 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1169 | err = nfs_init_nfspagecache(); |
| 1170 | if (err) |
| 1171 | goto out4; |
| 1172 | |
| 1173 | err = nfs_init_inodecache(); |
| 1174 | if (err) |
| 1175 | goto out3; |
| 1176 | |
| 1177 | err = nfs_init_readpagecache(); |
| 1178 | if (err) |
| 1179 | goto out2; |
| 1180 | |
| 1181 | err = nfs_init_writepagecache(); |
| 1182 | if (err) |
| 1183 | goto out1; |
| 1184 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1185 | err = nfs_init_directcache(); |
| 1186 | if (err) |
| 1187 | goto out0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1188 | |
| 1189 | #ifdef CONFIG_PROC_FS |
| 1190 | rpc_proc_register(&nfs_rpcstat); |
| 1191 | #endif |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 1192 | if ((err = register_nfs_fs()) != 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1193 | goto out; |
| 1194 | return 0; |
| 1195 | out: |
| 1196 | #ifdef CONFIG_PROC_FS |
| 1197 | rpc_proc_unregister("nfs"); |
| 1198 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1199 | nfs_destroy_directcache(); |
Chuck Lever | 6b59a75 | 2005-11-30 18:08:19 -0500 | [diff] [blame] | 1200 | out0: |
Chuck Lever | 6b59a75 | 2005-11-30 18:08:19 -0500 | [diff] [blame] | 1201 | nfs_destroy_writepagecache(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1202 | out1: |
| 1203 | nfs_destroy_readpagecache(); |
| 1204 | out2: |
| 1205 | nfs_destroy_inodecache(); |
| 1206 | out3: |
| 1207 | nfs_destroy_nfspagecache(); |
| 1208 | out4: |
David Howells | 6aaca56 | 2006-08-22 20:06:13 -0400 | [diff] [blame] | 1209 | nfs_fs_proc_exit(); |
| 1210 | out5: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1211 | return err; |
| 1212 | } |
| 1213 | |
| 1214 | static void __exit exit_nfs_fs(void) |
| 1215 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1216 | nfs_destroy_directcache(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1217 | nfs_destroy_writepagecache(); |
| 1218 | nfs_destroy_readpagecache(); |
| 1219 | nfs_destroy_inodecache(); |
| 1220 | nfs_destroy_nfspagecache(); |
| 1221 | #ifdef CONFIG_PROC_FS |
| 1222 | rpc_proc_unregister("nfs"); |
| 1223 | #endif |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 1224 | unregister_nfs_fs(); |
David Howells | 6aaca56 | 2006-08-22 20:06:13 -0400 | [diff] [blame] | 1225 | nfs_fs_proc_exit(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1226 | } |
| 1227 | |
| 1228 | /* Not quite true; I just maintain it */ |
| 1229 | MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>"); |
| 1230 | MODULE_LICENSE("GPL"); |
| 1231 | |
| 1232 | module_init(init_nfs_fs) |
| 1233 | module_exit(exit_nfs_fs) |