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 | * |
Alan Cox | 526719b | 2008-10-27 15:19:48 +0000 | [diff] [blame] | 8 | * Modularised by Alan Cox <alan@lxorguk.ukuu.org.uk>, while hacking some |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 9 | * experimental NFS changes. Modularisation taken straight from SYS5 fs. |
| 10 | * |
| 11 | * Change to nfs_read_super() to permit NFS mounts to multi-homed hosts. |
| 12 | * J.S.Peatfield@damtp.cam.ac.uk |
| 13 | * |
| 14 | */ |
| 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> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | #include <linux/seq_file.h> |
| 34 | #include <linux/mount.h> |
| 35 | #include <linux/nfs_idmap.h> |
| 36 | #include <linux/vfs.h> |
Manoj Naik | 9cdb388 | 2006-06-09 09:34:28 -0400 | [diff] [blame] | 37 | #include <linux/inet.h> |
| 38 | #include <linux/nfs_xdr.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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" |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 47 | #include "internal.h" |
David Howells | 8ec442a | 2009-04-03 16:42:42 +0100 | [diff] [blame] | 48 | #include "fscache.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 | |
Trond Myklebust | f43bf0b | 2007-10-09 12:01:04 -0400 | [diff] [blame] | 52 | #define NFS_64_BIT_INODE_NUMBERS_ENABLED 1 |
| 53 | |
| 54 | /* Default is to see 64-bit inode numbers */ |
| 55 | static int enable_ino64 = NFS_64_BIT_INODE_NUMBERS_ENABLED; |
| 56 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 57 | static void nfs_invalidate_inode(struct inode *); |
Trond Myklebust | 24aa1fe | 2005-12-03 15:20:07 -0500 | [diff] [blame] | 58 | static int nfs_update_inode(struct inode *, struct nfs_fattr *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 59 | |
Christoph Lameter | e18b890 | 2006-12-06 20:33:20 -0800 | [diff] [blame] | 60 | static struct kmem_cache * nfs_inode_cachep; |
Andreas Gruenbacher | b7fa055 | 2005-06-22 17:16:27 +0000 | [diff] [blame] | 61 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 62 | static inline unsigned long |
| 63 | nfs_fattr_to_ino_t(struct nfs_fattr *fattr) |
| 64 | { |
| 65 | return nfs_fileid_to_ino_t(fattr->fileid); |
| 66 | } |
| 67 | |
Trond Myklebust | f43bf0b | 2007-10-09 12:01:04 -0400 | [diff] [blame] | 68 | /** |
Trond Myklebust | 72cb77f | 2009-03-11 14:10:30 -0400 | [diff] [blame] | 69 | * nfs_wait_bit_killable - helper for functions that are sleeping on bit locks |
| 70 | * @word: long word containing the bit lock |
| 71 | */ |
| 72 | int nfs_wait_bit_killable(void *word) |
| 73 | { |
| 74 | if (fatal_signal_pending(current)) |
| 75 | return -ERESTARTSYS; |
| 76 | schedule(); |
| 77 | return 0; |
| 78 | } |
| 79 | |
| 80 | /** |
Trond Myklebust | f43bf0b | 2007-10-09 12:01:04 -0400 | [diff] [blame] | 81 | * nfs_compat_user_ino64 - returns the user-visible inode number |
| 82 | * @fileid: 64-bit fileid |
| 83 | * |
| 84 | * This function returns a 32-bit inode number if the boot parameter |
| 85 | * nfs.enable_ino64 is zero. |
| 86 | */ |
| 87 | u64 nfs_compat_user_ino64(u64 fileid) |
| 88 | { |
| 89 | int ino; |
| 90 | |
| 91 | if (enable_ino64) |
| 92 | return fileid; |
| 93 | ino = fileid; |
| 94 | if (sizeof(ino) < sizeof(fileid)) |
| 95 | ino ^= fileid >> (sizeof(fileid)-sizeof(ino)) * 8; |
| 96 | return ino; |
| 97 | } |
| 98 | |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 99 | int nfs_write_inode(struct inode *inode, int sync) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 100 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 101 | int ret; |
| 102 | |
Trond Myklebust | d30c834 | 2006-12-13 15:23:47 -0500 | [diff] [blame] | 103 | if (sync) { |
| 104 | ret = filemap_fdatawait(inode->i_mapping); |
| 105 | if (ret == 0) |
| 106 | ret = nfs_commit_inode(inode, FLUSH_SYNC); |
| 107 | } else |
| 108 | ret = nfs_commit_inode(inode, 0); |
| 109 | if (ret >= 0) |
| 110 | return 0; |
| 111 | __mark_inode_dirty(inode, I_DIRTY_DATASYNC); |
| 112 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 113 | } |
| 114 | |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 115 | void nfs_clear_inode(struct inode *inode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 116 | { |
Trond Myklebust | da6d503 | 2006-06-01 17:26:35 -0400 | [diff] [blame] | 117 | /* |
| 118 | * The following should never happen... |
| 119 | */ |
| 120 | BUG_ON(nfs_have_writebacks(inode)); |
Trond Myklebust | 1c3c07e | 2006-07-25 11:28:18 -0400 | [diff] [blame] | 121 | BUG_ON(!list_empty(&NFS_I(inode)->open_files)); |
Trond Myklebust | ada70d9 | 2005-06-22 17:16:22 +0000 | [diff] [blame] | 122 | nfs_zap_acl_cache(inode); |
Trond Myklebust | 1c3c07e | 2006-07-25 11:28:18 -0400 | [diff] [blame] | 123 | nfs_access_zap_cache(inode); |
David Howells | ef79c09 | 2009-04-03 16:42:43 +0100 | [diff] [blame] | 124 | nfs_fscache_release_inode_cookie(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 125 | } |
| 126 | |
Trond Myklebust | 29884df | 2005-12-13 16:13:54 -0500 | [diff] [blame] | 127 | /** |
| 128 | * nfs_sync_mapping - helper to flush all mmapped dirty data to disk |
| 129 | */ |
| 130 | int nfs_sync_mapping(struct address_space *mapping) |
| 131 | { |
| 132 | int ret; |
| 133 | |
| 134 | if (mapping->nrpages == 0) |
| 135 | return 0; |
| 136 | unmap_mapping_range(mapping, 0, 0, 0); |
OGAWA Hirofumi | 28fd129 | 2006-01-08 01:02:14 -0800 | [diff] [blame] | 137 | ret = filemap_write_and_wait(mapping); |
Trond Myklebust | 29884df | 2005-12-13 16:13:54 -0500 | [diff] [blame] | 138 | if (ret != 0) |
| 139 | goto out; |
| 140 | ret = nfs_wb_all(mapping->host); |
| 141 | out: |
| 142 | return ret; |
| 143 | } |
| 144 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 145 | /* |
| 146 | * Invalidate the local caches |
| 147 | */ |
Trond Myklebust | b37b03b | 2005-11-25 17:10:06 -0500 | [diff] [blame] | 148 | static void nfs_zap_caches_locked(struct inode *inode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 149 | { |
| 150 | struct nfs_inode *nfsi = NFS_I(inode); |
| 151 | int mode = inode->i_mode; |
| 152 | |
Chuck Lever | 91d5b47 | 2006-03-20 13:44:14 -0500 | [diff] [blame] | 153 | nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE); |
| 154 | |
Trond Myklebust | c7c2097 | 2007-09-28 19:22:40 -0400 | [diff] [blame] | 155 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); |
| 156 | nfsi->attrtimeo_timestamp = jiffies; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 157 | |
| 158 | memset(NFS_COOKIEVERF(inode), 0, sizeof(NFS_COOKIEVERF(inode))); |
| 159 | if (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode)) |
Chuck Lever | 5529680 | 2005-08-18 11:24:09 -0700 | [diff] [blame] | 160 | 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] | 161 | else |
Chuck Lever | 5529680 | 2005-08-18 11:24:09 -0700 | [diff] [blame] | 162 | 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] | 163 | } |
Chuck Lever | dc59250 | 2005-08-18 11:24:12 -0700 | [diff] [blame] | 164 | |
Trond Myklebust | b37b03b | 2005-11-25 17:10:06 -0500 | [diff] [blame] | 165 | void nfs_zap_caches(struct inode *inode) |
| 166 | { |
| 167 | spin_lock(&inode->i_lock); |
| 168 | nfs_zap_caches_locked(inode); |
Chuck Lever | dc59250 | 2005-08-18 11:24:12 -0700 | [diff] [blame] | 169 | spin_unlock(&inode->i_lock); |
Trond Myklebust | ada70d9 | 2005-06-22 17:16:22 +0000 | [diff] [blame] | 170 | } |
| 171 | |
Trond Myklebust | cd9ae2b | 2006-10-19 23:28:40 -0700 | [diff] [blame] | 172 | void nfs_zap_mapping(struct inode *inode, struct address_space *mapping) |
| 173 | { |
| 174 | if (mapping->nrpages != 0) { |
| 175 | spin_lock(&inode->i_lock); |
| 176 | NFS_I(inode)->cache_validity |= NFS_INO_INVALID_DATA; |
| 177 | spin_unlock(&inode->i_lock); |
| 178 | } |
| 179 | } |
| 180 | |
Trond Myklebust | f41f741 | 2008-06-11 17:39:04 -0400 | [diff] [blame] | 181 | void nfs_zap_acl_cache(struct inode *inode) |
Trond Myklebust | ada70d9 | 2005-06-22 17:16:22 +0000 | [diff] [blame] | 182 | { |
| 183 | void (*clear_acl_cache)(struct inode *); |
| 184 | |
| 185 | clear_acl_cache = NFS_PROTO(inode)->clear_acl_cache; |
| 186 | if (clear_acl_cache != NULL) |
| 187 | clear_acl_cache(inode); |
Chuck Lever | dc59250 | 2005-08-18 11:24:12 -0700 | [diff] [blame] | 188 | spin_lock(&inode->i_lock); |
Chuck Lever | 5529680 | 2005-08-18 11:24:09 -0700 | [diff] [blame] | 189 | NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_ACL; |
Chuck Lever | dc59250 | 2005-08-18 11:24:12 -0700 | [diff] [blame] | 190 | spin_unlock(&inode->i_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 191 | } |
| 192 | |
Trond Myklebust | c481299 | 2007-09-28 17:11:45 -0400 | [diff] [blame] | 193 | void nfs_invalidate_atime(struct inode *inode) |
| 194 | { |
| 195 | spin_lock(&inode->i_lock); |
| 196 | NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATIME; |
| 197 | spin_unlock(&inode->i_lock); |
| 198 | } |
| 199 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 200 | /* |
Trond Myklebust | b37b03b | 2005-11-25 17:10:06 -0500 | [diff] [blame] | 201 | * Invalidate, but do not unhash, the inode. |
| 202 | * NB: must be called with inode->i_lock held! |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 203 | */ |
Trond Myklebust | b37b03b | 2005-11-25 17:10:06 -0500 | [diff] [blame] | 204 | static void nfs_invalidate_inode(struct inode *inode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 205 | { |
Benny Halevy | 3a10c30 | 2008-01-23 08:58:59 +0200 | [diff] [blame] | 206 | set_bit(NFS_INO_STALE, &NFS_I(inode)->flags); |
Trond Myklebust | b37b03b | 2005-11-25 17:10:06 -0500 | [diff] [blame] | 207 | nfs_zap_caches_locked(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 208 | } |
| 209 | |
| 210 | struct nfs_find_desc { |
| 211 | struct nfs_fh *fh; |
| 212 | struct nfs_fattr *fattr; |
| 213 | }; |
| 214 | |
| 215 | /* |
| 216 | * In NFSv3 we can have 64bit inode numbers. In order to support |
| 217 | * this, and re-exported directories (also seen in NFSv2) |
| 218 | * we are forced to allow 2 different inodes to have the same |
| 219 | * i_ino. |
| 220 | */ |
| 221 | static int |
| 222 | nfs_find_actor(struct inode *inode, void *opaque) |
| 223 | { |
| 224 | struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque; |
| 225 | struct nfs_fh *fh = desc->fh; |
| 226 | struct nfs_fattr *fattr = desc->fattr; |
| 227 | |
| 228 | if (NFS_FILEID(inode) != fattr->fileid) |
| 229 | return 0; |
| 230 | if (nfs_compare_fh(NFS_FH(inode), fh)) |
| 231 | return 0; |
| 232 | if (is_bad_inode(inode) || NFS_STALE(inode)) |
| 233 | return 0; |
| 234 | return 1; |
| 235 | } |
| 236 | |
| 237 | static int |
| 238 | nfs_init_locked(struct inode *inode, void *opaque) |
| 239 | { |
| 240 | struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque; |
| 241 | struct nfs_fattr *fattr = desc->fattr; |
| 242 | |
Benny Halevy | 99fadcd | 2008-01-23 08:59:08 +0200 | [diff] [blame] | 243 | set_nfs_fileid(inode, fattr->fileid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 244 | nfs_copy_fh(NFS_FH(inode), desc->fh); |
| 245 | return 0; |
| 246 | } |
| 247 | |
| 248 | /* Don't use READDIRPLUS on directories that we believe are too large */ |
| 249 | #define NFS_LIMIT_READDIRPLUS (8*PAGE_SIZE) |
| 250 | |
| 251 | /* |
| 252 | * This is our front-end to iget that looks up inodes by file handle |
| 253 | * instead of inode number. |
| 254 | */ |
| 255 | struct inode * |
| 256 | nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr) |
| 257 | { |
| 258 | struct nfs_find_desc desc = { |
| 259 | .fh = fh, |
| 260 | .fattr = fattr |
| 261 | }; |
Trond Myklebust | 03f28e3 | 2006-03-20 13:44:48 -0500 | [diff] [blame] | 262 | struct inode *inode = ERR_PTR(-ENOENT); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 263 | unsigned long hash; |
| 264 | |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 265 | if ((fattr->valid & NFS_ATTR_FATTR_FILEID) == 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 266 | goto out_no_inode; |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 267 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) == 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 268 | goto out_no_inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 269 | |
| 270 | hash = nfs_fattr_to_ino_t(fattr); |
| 271 | |
Trond Myklebust | 03f28e3 | 2006-03-20 13:44:48 -0500 | [diff] [blame] | 272 | inode = iget5_locked(sb, hash, nfs_find_actor, nfs_init_locked, &desc); |
| 273 | if (inode == NULL) { |
| 274 | inode = ERR_PTR(-ENOMEM); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 275 | goto out_no_inode; |
Trond Myklebust | 03f28e3 | 2006-03-20 13:44:48 -0500 | [diff] [blame] | 276 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 277 | |
| 278 | if (inode->i_state & I_NEW) { |
| 279 | struct nfs_inode *nfsi = NFS_I(inode); |
Trond Myklebust | b0c4fdd | 2007-02-05 14:44:22 -0800 | [diff] [blame] | 280 | unsigned long now = jiffies; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 281 | |
| 282 | /* We set i_ino for the few things that still rely on it, |
| 283 | * such as stat(2) */ |
| 284 | inode->i_ino = hash; |
| 285 | |
| 286 | /* We can't support update_atime(), since the server will reset it */ |
| 287 | inode->i_flags |= S_NOATIME|S_NOCMTIME; |
| 288 | inode->i_mode = fattr->mode; |
| 289 | /* Why so? Because we want revalidate for devices/FIFOs, and |
| 290 | * that's precisely what we have in nfs_file_inode_operations. |
| 291 | */ |
David Howells | 8fa5c00 | 2006-08-22 20:06:12 -0400 | [diff] [blame] | 292 | 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] | 293 | if (S_ISREG(inode->i_mode)) { |
| 294 | inode->i_fop = &nfs_file_operations; |
| 295 | inode->i_data.a_ops = &nfs_file_aops; |
| 296 | inode->i_data.backing_dev_info = &NFS_SB(sb)->backing_dev_info; |
| 297 | } else if (S_ISDIR(inode->i_mode)) { |
David Howells | 8fa5c00 | 2006-08-22 20:06:12 -0400 | [diff] [blame] | 298 | 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] | 299 | inode->i_fop = &nfs_dir_operations; |
| 300 | if (nfs_server_capable(inode, NFS_CAP_READDIRPLUS) |
| 301 | && fattr->size <= NFS_LIMIT_READDIRPLUS) |
Benny Halevy | 3a10c30 | 2008-01-23 08:58:59 +0200 | [diff] [blame] | 302 | set_bit(NFS_INO_ADVISE_RDPLUS, &NFS_I(inode)->flags); |
Trond Myklebust | 55a9759 | 2006-06-09 09:34:19 -0400 | [diff] [blame] | 303 | /* Deal with crossing mountpoints */ |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 304 | if ((fattr->valid & NFS_ATTR_FATTR_FSID) |
| 305 | && !nfs_fsid_equal(&NFS_SB(sb)->fsid, &fattr->fsid)) { |
Manoj Naik | 6b97fd3 | 2006-06-09 09:34:29 -0400 | [diff] [blame] | 306 | if (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) |
| 307 | inode->i_op = &nfs_referral_inode_operations; |
| 308 | else |
| 309 | inode->i_op = &nfs_mountpoint_inode_operations; |
Trond Myklebust | 55a9759 | 2006-06-09 09:34:19 -0400 | [diff] [blame] | 310 | inode->i_fop = NULL; |
Trond Myklebust | c37dcd33 | 2008-03-06 12:34:50 -0500 | [diff] [blame] | 311 | set_bit(NFS_INO_MOUNTPOINT, &nfsi->flags); |
Trond Myklebust | 55a9759 | 2006-06-09 09:34:19 -0400 | [diff] [blame] | 312 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 313 | } else if (S_ISLNK(inode->i_mode)) |
| 314 | inode->i_op = &nfs_symlink_inode_operations; |
| 315 | else |
| 316 | init_special_inode(inode, inode->i_mode, fattr->rdev); |
| 317 | |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 318 | memset(&inode->i_atime, 0, sizeof(inode->i_atime)); |
| 319 | memset(&inode->i_mtime, 0, sizeof(inode->i_mtime)); |
| 320 | memset(&inode->i_ctime, 0, sizeof(inode->i_ctime)); |
| 321 | nfsi->change_attr = 0; |
| 322 | inode->i_size = 0; |
| 323 | inode->i_nlink = 0; |
| 324 | inode->i_uid = -2; |
| 325 | inode->i_gid = -2; |
| 326 | inode->i_blocks = 0; |
| 327 | memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf)); |
| 328 | |
Trond Myklebust | 3380114 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 329 | nfsi->read_cache_jiffies = fattr->time_start; |
Trond Myklebust | 4704f0e | 2008-10-14 19:16:07 -0400 | [diff] [blame] | 330 | nfsi->attr_gencount = fattr->gencount; |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 331 | if (fattr->valid & NFS_ATTR_FATTR_ATIME) |
| 332 | inode->i_atime = fattr->atime; |
| 333 | if (fattr->valid & NFS_ATTR_FATTR_MTIME) |
| 334 | inode->i_mtime = fattr->mtime; |
| 335 | if (fattr->valid & NFS_ATTR_FATTR_CTIME) |
| 336 | inode->i_ctime = fattr->ctime; |
| 337 | if (fattr->valid & NFS_ATTR_FATTR_CHANGE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 338 | nfsi->change_attr = fattr->change_attr; |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 339 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) |
| 340 | inode->i_size = nfs_size_to_loff_t(fattr->size); |
| 341 | if (fattr->valid & NFS_ATTR_FATTR_NLINK) |
| 342 | inode->i_nlink = fattr->nlink; |
| 343 | if (fattr->valid & NFS_ATTR_FATTR_OWNER) |
| 344 | inode->i_uid = fattr->uid; |
| 345 | if (fattr->valid & NFS_ATTR_FATTR_GROUP) |
| 346 | inode->i_gid = fattr->gid; |
| 347 | if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED) |
| 348 | inode->i_blocks = fattr->du.nfs2.blocks; |
| 349 | if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 350 | /* |
| 351 | * report the blocks in 512byte units |
| 352 | */ |
| 353 | inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 354 | } |
| 355 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); |
Trond Myklebust | b0c4fdd | 2007-02-05 14:44:22 -0800 | [diff] [blame] | 356 | nfsi->attrtimeo_timestamp = now; |
Trond Myklebust | 1c3c07e | 2006-07-25 11:28:18 -0400 | [diff] [blame] | 357 | nfsi->access_cache = RB_ROOT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 358 | |
David Howells | ef79c09 | 2009-04-03 16:42:43 +0100 | [diff] [blame] | 359 | nfs_fscache_init_inode_cookie(inode); |
| 360 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 361 | unlock_new_inode(inode); |
| 362 | } else |
| 363 | nfs_refresh_inode(inode, fattr); |
| 364 | dprintk("NFS: nfs_fhget(%s/%Ld ct=%d)\n", |
| 365 | inode->i_sb->s_id, |
| 366 | (long long)NFS_FILEID(inode), |
| 367 | atomic_read(&inode->i_count)); |
| 368 | |
| 369 | out: |
| 370 | return inode; |
| 371 | |
| 372 | out_no_inode: |
Trond Myklebust | 03f28e3 | 2006-03-20 13:44:48 -0500 | [diff] [blame] | 373 | dprintk("nfs_fhget: iget failed with error %ld\n", PTR_ERR(inode)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 374 | goto out; |
| 375 | } |
| 376 | |
Trond Myklebust | 659bfcd | 2008-06-10 19:39:41 -0400 | [diff] [blame] | 377 | #define NFS_VALID_ATTRS (ATTR_MODE|ATTR_UID|ATTR_GID|ATTR_SIZE|ATTR_ATIME|ATTR_ATIME_SET|ATTR_MTIME|ATTR_MTIME_SET|ATTR_FILE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 378 | |
| 379 | int |
| 380 | nfs_setattr(struct dentry *dentry, struct iattr *attr) |
| 381 | { |
| 382 | struct inode *inode = dentry->d_inode; |
| 383 | struct nfs_fattr fattr; |
| 384 | int error; |
| 385 | |
Chuck Lever | 91d5b47 | 2006-03-20 13:44:14 -0500 | [diff] [blame] | 386 | nfs_inc_stats(inode, NFSIOS_VFSSETATTR); |
| 387 | |
Jeff Layton | 188b95d | 2007-10-18 03:05:21 -0700 | [diff] [blame] | 388 | /* skip mode change if it's just for clearing setuid/setgid */ |
| 389 | if (attr->ia_valid & (ATTR_KILL_SUID | ATTR_KILL_SGID)) |
| 390 | attr->ia_valid &= ~ATTR_MODE; |
| 391 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 392 | if (attr->ia_valid & ATTR_SIZE) { |
| 393 | if (!S_ISREG(inode->i_mode) || attr->ia_size == i_size_read(inode)) |
| 394 | attr->ia_valid &= ~ATTR_SIZE; |
| 395 | } |
| 396 | |
| 397 | /* Optimization: if the end result is no change, don't RPC */ |
| 398 | attr->ia_valid &= NFS_VALID_ATTRS; |
Trond Myklebust | 659bfcd | 2008-06-10 19:39:41 -0400 | [diff] [blame] | 399 | if ((attr->ia_valid & ~ATTR_FILE) == 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 400 | return 0; |
| 401 | |
Trond Myklebust | 755c1e2 | 2006-03-20 13:44:06 -0500 | [diff] [blame] | 402 | /* Write all dirty data */ |
Trond Myklebust | e1552e1 | 2007-04-14 19:07:28 -0400 | [diff] [blame] | 403 | if (S_ISREG(inode->i_mode)) { |
| 404 | filemap_write_and_wait(inode->i_mapping); |
| 405 | nfs_wb_all(inode); |
| 406 | } |
Trond Myklebust | 642ac54 | 2005-10-18 14:20:19 -0700 | [diff] [blame] | 407 | /* |
| 408 | * Return any delegations if we're going to change ACLs |
| 409 | */ |
| 410 | if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) |
| 411 | nfs_inode_return_delegation(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 412 | error = NFS_PROTO(inode)->setattr(dentry, &fattr, attr); |
Trond Myklebust | 65e4308 | 2005-08-16 11:49:44 -0400 | [diff] [blame] | 413 | if (error == 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 414 | nfs_refresh_inode(inode, &fattr); |
Trond Myklebust | 65e4308 | 2005-08-16 11:49:44 -0400 | [diff] [blame] | 415 | return error; |
| 416 | } |
| 417 | |
| 418 | /** |
Trond Myklebust | a3d0145 | 2008-06-11 12:21:19 -0400 | [diff] [blame] | 419 | * nfs_vmtruncate - unmap mappings "freed" by truncate() syscall |
| 420 | * @inode: inode of the file used |
| 421 | * @offset: file offset to start truncating |
| 422 | * |
| 423 | * This is a copy of the common vmtruncate, but with the locking |
| 424 | * corrected to take into account the fact that NFS requires |
| 425 | * inode->i_size to be updated under the inode->i_lock. |
| 426 | */ |
| 427 | static int nfs_vmtruncate(struct inode * inode, loff_t offset) |
| 428 | { |
| 429 | if (i_size_read(inode) < offset) { |
| 430 | unsigned long limit; |
| 431 | |
| 432 | limit = current->signal->rlim[RLIMIT_FSIZE].rlim_cur; |
| 433 | if (limit != RLIM_INFINITY && offset > limit) |
| 434 | goto out_sig; |
| 435 | if (offset > inode->i_sb->s_maxbytes) |
| 436 | goto out_big; |
| 437 | spin_lock(&inode->i_lock); |
| 438 | i_size_write(inode, offset); |
| 439 | spin_unlock(&inode->i_lock); |
| 440 | } else { |
| 441 | struct address_space *mapping = inode->i_mapping; |
| 442 | |
| 443 | /* |
| 444 | * truncation of in-use swapfiles is disallowed - it would |
| 445 | * cause subsequent swapout to scribble on the now-freed |
| 446 | * blocks. |
| 447 | */ |
| 448 | if (IS_SWAPFILE(inode)) |
| 449 | return -ETXTBSY; |
| 450 | spin_lock(&inode->i_lock); |
| 451 | i_size_write(inode, offset); |
| 452 | spin_unlock(&inode->i_lock); |
| 453 | |
| 454 | /* |
| 455 | * unmap_mapping_range is called twice, first simply for |
| 456 | * efficiency so that truncate_inode_pages does fewer |
| 457 | * single-page unmaps. However after this first call, and |
| 458 | * before truncate_inode_pages finishes, it is possible for |
| 459 | * private pages to be COWed, which remain after |
| 460 | * truncate_inode_pages finishes, hence the second |
| 461 | * unmap_mapping_range call must be made for correctness. |
| 462 | */ |
| 463 | unmap_mapping_range(mapping, offset + PAGE_SIZE - 1, 0, 1); |
| 464 | truncate_inode_pages(mapping, offset); |
| 465 | unmap_mapping_range(mapping, offset + PAGE_SIZE - 1, 0, 1); |
| 466 | } |
| 467 | return 0; |
| 468 | out_sig: |
| 469 | send_sig(SIGXFSZ, current, 0); |
| 470 | out_big: |
| 471 | return -EFBIG; |
| 472 | } |
| 473 | |
| 474 | /** |
Trond Myklebust | 65e4308 | 2005-08-16 11:49:44 -0400 | [diff] [blame] | 475 | * nfs_setattr_update_inode - Update inode metadata after a setattr call. |
| 476 | * @inode: pointer to struct inode |
| 477 | * @attr: pointer to struct iattr |
| 478 | * |
| 479 | * Note: we do this in the *proc.c in order to ensure that |
| 480 | * it works for things like exclusive creates too. |
| 481 | */ |
| 482 | void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr) |
| 483 | { |
| 484 | if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) { |
Trond Myklebust | 2f28ea6 | 2008-10-05 14:26:11 -0400 | [diff] [blame] | 485 | spin_lock(&inode->i_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 486 | if ((attr->ia_valid & ATTR_MODE) != 0) { |
Trond Myklebust | 65e4308 | 2005-08-16 11:49:44 -0400 | [diff] [blame] | 487 | int mode = attr->ia_mode & S_IALLUGO; |
| 488 | mode |= inode->i_mode & ~S_IALLUGO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 489 | inode->i_mode = mode; |
| 490 | } |
| 491 | if ((attr->ia_valid & ATTR_UID) != 0) |
| 492 | inode->i_uid = attr->ia_uid; |
| 493 | if ((attr->ia_valid & ATTR_GID) != 0) |
| 494 | inode->i_gid = attr->ia_gid; |
Chuck Lever | 5529680 | 2005-08-18 11:24:09 -0700 | [diff] [blame] | 495 | 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] | 496 | spin_unlock(&inode->i_lock); |
Trond Myklebust | 65e4308 | 2005-08-16 11:49:44 -0400 | [diff] [blame] | 497 | } |
| 498 | if ((attr->ia_valid & ATTR_SIZE) != 0) { |
Chuck Lever | 91d5b47 | 2006-03-20 13:44:14 -0500 | [diff] [blame] | 499 | nfs_inc_stats(inode, NFSIOS_SETATTRTRUNC); |
Trond Myklebust | a3d0145 | 2008-06-11 12:21:19 -0400 | [diff] [blame] | 500 | nfs_vmtruncate(inode, attr->ia_size); |
Trond Myklebust | 65e4308 | 2005-08-16 11:49:44 -0400 | [diff] [blame] | 501 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 502 | } |
| 503 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 504 | int nfs_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat) |
| 505 | { |
| 506 | struct inode *inode = dentry->d_inode; |
Chuck Lever | 5529680 | 2005-08-18 11:24:09 -0700 | [diff] [blame] | 507 | int need_atime = NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATIME; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 508 | int err; |
| 509 | |
Chuck Lever | 28c494c | 2007-10-26 13:32:13 -0400 | [diff] [blame] | 510 | /* |
| 511 | * Flush out writes to the server in order to update c/mtime. |
| 512 | * |
| 513 | * Hold the i_mutex to suspend application writes temporarily; |
| 514 | * this prevents long-running writing applications from blocking |
| 515 | * nfs_wb_nocommit. |
| 516 | */ |
| 517 | if (S_ISREG(inode->i_mode)) { |
| 518 | mutex_lock(&inode->i_mutex); |
Trond Myklebust | ed90ef5 | 2007-07-20 13:13:28 -0400 | [diff] [blame] | 519 | nfs_wb_nocommit(inode); |
Chuck Lever | 28c494c | 2007-10-26 13:32:13 -0400 | [diff] [blame] | 520 | mutex_unlock(&inode->i_mutex); |
| 521 | } |
Christoph Hellwig | fc33a7b | 2006-01-09 20:52:17 -0800 | [diff] [blame] | 522 | |
| 523 | /* |
| 524 | * We may force a getattr if the user cares about atime. |
| 525 | * |
| 526 | * Note that we only have to check the vfsmount flags here: |
| 527 | * - NFS always sets S_NOATIME by so checking it would give a |
| 528 | * bogus result |
| 529 | * - NFS never sets MS_NOATIME or MS_NODIRATIME so there is |
| 530 | * no point in checking those. |
| 531 | */ |
| 532 | if ((mnt->mnt_flags & MNT_NOATIME) || |
| 533 | ((mnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 534 | need_atime = 0; |
Christoph Hellwig | fc33a7b | 2006-01-09 20:52:17 -0800 | [diff] [blame] | 535 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 536 | if (need_atime) |
| 537 | err = __nfs_revalidate_inode(NFS_SERVER(inode), inode); |
| 538 | else |
| 539 | err = nfs_revalidate_inode(NFS_SERVER(inode), inode); |
Peter Staubach | 4e769b9 | 2007-08-03 15:07:10 -0400 | [diff] [blame] | 540 | if (!err) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 541 | generic_fillattr(inode, stat); |
Trond Myklebust | f43bf0b | 2007-10-09 12:01:04 -0400 | [diff] [blame] | 542 | stat->ino = nfs_compat_user_ino64(NFS_FILEID(inode)); |
Peter Staubach | 4e769b9 | 2007-08-03 15:07:10 -0400 | [diff] [blame] | 543 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 544 | return err; |
| 545 | } |
| 546 | |
Trond Myklebust | 7fe5c39 | 2009-03-19 15:35:50 -0400 | [diff] [blame] | 547 | /** |
| 548 | * nfs_close_context - Common close_context() routine NFSv2/v3 |
| 549 | * @ctx: pointer to context |
| 550 | * @is_sync: is this a synchronous close |
| 551 | * |
| 552 | * always ensure that the attributes are up to date if we're mounted |
| 553 | * with close-to-open semantics |
| 554 | */ |
| 555 | void nfs_close_context(struct nfs_open_context *ctx, int is_sync) |
| 556 | { |
| 557 | struct inode *inode; |
| 558 | struct nfs_server *server; |
| 559 | |
| 560 | if (!(ctx->mode & FMODE_WRITE)) |
| 561 | return; |
| 562 | if (!is_sync) |
| 563 | return; |
| 564 | inode = ctx->path.dentry->d_inode; |
| 565 | if (!list_empty(&NFS_I(inode)->open_files)) |
| 566 | return; |
| 567 | server = NFS_SERVER(inode); |
| 568 | if (server->flags & NFS_MOUNT_NOCTO) |
| 569 | return; |
| 570 | nfs_revalidate_inode(server, inode); |
| 571 | } |
| 572 | |
Trond Myklebust | b92dccf | 2006-03-20 13:44:03 -0500 | [diff] [blame] | 573 | 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] | 574 | { |
| 575 | struct nfs_open_context *ctx; |
| 576 | |
Panagiotis Issaris | f52720c | 2006-09-27 01:49:39 -0700 | [diff] [blame] | 577 | ctx = kmalloc(sizeof(*ctx), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 578 | if (ctx != NULL) { |
Trond Myklebust | 88be9f9 | 2007-06-05 10:42:27 -0400 | [diff] [blame] | 579 | ctx->path.dentry = dget(dentry); |
| 580 | ctx->path.mnt = mntget(mnt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 581 | ctx->cred = get_rpccred(cred); |
| 582 | ctx->state = NULL; |
| 583 | ctx->lockowner = current->files; |
Jeff Layton | 66d3aac | 2008-03-31 15:01:58 -0400 | [diff] [blame] | 584 | ctx->flags = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 585 | ctx->error = 0; |
Olivier Galibert | 00a9264 | 2005-06-22 17:16:29 +0000 | [diff] [blame] | 586 | ctx->dir_cookie = 0; |
Trond Myklebust | 5e11934 | 2007-07-26 12:06:17 -0400 | [diff] [blame] | 587 | atomic_set(&ctx->count, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 588 | } |
| 589 | return ctx; |
| 590 | } |
| 591 | |
| 592 | struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx) |
| 593 | { |
| 594 | if (ctx != NULL) |
Trond Myklebust | 5e11934 | 2007-07-26 12:06:17 -0400 | [diff] [blame] | 595 | atomic_inc(&ctx->count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 596 | return ctx; |
| 597 | } |
| 598 | |
Trond Myklebust | 7fe5c39 | 2009-03-19 15:35:50 -0400 | [diff] [blame] | 599 | static void __put_nfs_open_context(struct nfs_open_context *ctx, int is_sync) |
Trond Myklebust | 3bec63d | 2007-06-17 16:02:44 -0400 | [diff] [blame] | 600 | { |
Trond Myklebust | 7fe5c39 | 2009-03-19 15:35:50 -0400 | [diff] [blame] | 601 | struct inode *inode = ctx->path.dentry->d_inode; |
Trond Myklebust | 3bec63d | 2007-06-17 16:02:44 -0400 | [diff] [blame] | 602 | |
Trond Myklebust | 5e11934 | 2007-07-26 12:06:17 -0400 | [diff] [blame] | 603 | if (!atomic_dec_and_lock(&ctx->count, &inode->i_lock)) |
| 604 | return; |
| 605 | list_del(&ctx->list); |
| 606 | spin_unlock(&inode->i_lock); |
Trond Myklebust | 7fe5c39 | 2009-03-19 15:35:50 -0400 | [diff] [blame] | 607 | NFS_PROTO(inode)->close_context(ctx, is_sync); |
Trond Myklebust | 3bec63d | 2007-06-17 16:02:44 -0400 | [diff] [blame] | 608 | if (ctx->cred != NULL) |
| 609 | put_rpccred(ctx->cred); |
Jan Blunck | 31f31db | 2008-05-02 13:42:45 -0700 | [diff] [blame] | 610 | path_put(&ctx->path); |
Trond Myklebust | 3bec63d | 2007-06-17 16:02:44 -0400 | [diff] [blame] | 611 | kfree(ctx); |
| 612 | } |
| 613 | |
Trond Myklebust | a49c3c7 | 2007-10-18 18:03:27 -0400 | [diff] [blame] | 614 | void put_nfs_open_context(struct nfs_open_context *ctx) |
| 615 | { |
| 616 | __put_nfs_open_context(ctx, 0); |
| 617 | } |
| 618 | |
| 619 | static void put_nfs_open_context_sync(struct nfs_open_context *ctx) |
| 620 | { |
| 621 | __put_nfs_open_context(ctx, 1); |
| 622 | } |
| 623 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 624 | /* |
| 625 | * Ensure that mmap has a recent RPC credential for use when writing out |
| 626 | * shared pages |
| 627 | */ |
Trond Myklebust | b92dccf | 2006-03-20 13:44:03 -0500 | [diff] [blame] | 628 | 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] | 629 | { |
Josef "Jeff" Sipek | 01cce93 | 2006-12-08 02:36:40 -0800 | [diff] [blame] | 630 | struct inode *inode = filp->f_path.dentry->d_inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 631 | struct nfs_inode *nfsi = NFS_I(inode); |
| 632 | |
| 633 | filp->private_data = get_nfs_open_context(ctx); |
| 634 | spin_lock(&inode->i_lock); |
| 635 | list_add(&ctx->list, &nfsi->open_files); |
| 636 | spin_unlock(&inode->i_lock); |
| 637 | } |
| 638 | |
Trond Myklebust | d530838 | 2005-11-04 15:33:38 -0500 | [diff] [blame] | 639 | /* |
| 640 | * Given an inode, search for an open context with the desired characteristics |
| 641 | */ |
Trond Myklebust | dc0b027 | 2008-12-23 15:21:56 -0500 | [diff] [blame] | 642 | struct nfs_open_context *nfs_find_open_context(struct inode *inode, struct rpc_cred *cred, fmode_t mode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 643 | { |
| 644 | struct nfs_inode *nfsi = NFS_I(inode); |
| 645 | struct nfs_open_context *pos, *ctx = NULL; |
| 646 | |
| 647 | spin_lock(&inode->i_lock); |
| 648 | list_for_each_entry(pos, &nfsi->open_files, list) { |
Trond Myklebust | d530838 | 2005-11-04 15:33:38 -0500 | [diff] [blame] | 649 | if (cred != NULL && pos->cred != cred) |
| 650 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 651 | if ((pos->mode & mode) == mode) { |
| 652 | ctx = get_nfs_open_context(pos); |
| 653 | break; |
| 654 | } |
| 655 | } |
| 656 | spin_unlock(&inode->i_lock); |
| 657 | return ctx; |
| 658 | } |
| 659 | |
Trond Myklebust | b92dccf | 2006-03-20 13:44:03 -0500 | [diff] [blame] | 660 | static void nfs_file_clear_open_context(struct file *filp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 661 | { |
Josef "Jeff" Sipek | 01cce93 | 2006-12-08 02:36:40 -0800 | [diff] [blame] | 662 | struct inode *inode = filp->f_path.dentry->d_inode; |
Trond Myklebust | cd3758e | 2007-08-10 17:44:32 -0400 | [diff] [blame] | 663 | struct nfs_open_context *ctx = nfs_file_open_context(filp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 664 | |
| 665 | if (ctx) { |
| 666 | filp->private_data = NULL; |
| 667 | spin_lock(&inode->i_lock); |
| 668 | list_move_tail(&ctx->list, &NFS_I(inode)->open_files); |
| 669 | spin_unlock(&inode->i_lock); |
Trond Myklebust | a49c3c7 | 2007-10-18 18:03:27 -0400 | [diff] [blame] | 670 | put_nfs_open_context_sync(ctx); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 671 | } |
| 672 | } |
| 673 | |
| 674 | /* |
| 675 | * These allocate and release file read/write context information. |
| 676 | */ |
| 677 | int nfs_open(struct inode *inode, struct file *filp) |
| 678 | { |
| 679 | struct nfs_open_context *ctx; |
| 680 | struct rpc_cred *cred; |
| 681 | |
Trond Myklebust | 98a8e32 | 2008-03-12 12:25:28 -0400 | [diff] [blame] | 682 | cred = rpc_lookup_cred(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 683 | if (IS_ERR(cred)) |
| 684 | return PTR_ERR(cred); |
Josef "Jeff" Sipek | 01cce93 | 2006-12-08 02:36:40 -0800 | [diff] [blame] | 685 | 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] | 686 | put_rpccred(cred); |
| 687 | if (ctx == NULL) |
| 688 | return -ENOMEM; |
| 689 | ctx->mode = filp->f_mode; |
| 690 | nfs_file_set_open_context(filp, ctx); |
| 691 | put_nfs_open_context(ctx); |
David Howells | ef79c09 | 2009-04-03 16:42:43 +0100 | [diff] [blame] | 692 | nfs_fscache_set_inode_cookie(inode, filp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 693 | return 0; |
| 694 | } |
| 695 | |
| 696 | int nfs_release(struct inode *inode, struct file *filp) |
| 697 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 698 | nfs_file_clear_open_context(filp); |
| 699 | return 0; |
| 700 | } |
| 701 | |
| 702 | /* |
| 703 | * This function is called whenever some part of NFS notices that |
| 704 | * the cached attributes have to be refreshed. |
| 705 | */ |
| 706 | int |
| 707 | __nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) |
| 708 | { |
| 709 | int status = -ESTALE; |
| 710 | struct nfs_fattr fattr; |
| 711 | struct nfs_inode *nfsi = NFS_I(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 712 | |
| 713 | dfprintk(PAGECACHE, "NFS: revalidating (%s/%Ld)\n", |
| 714 | inode->i_sb->s_id, (long long)NFS_FILEID(inode)); |
| 715 | |
Chuck Lever | 85233a7 | 2006-10-19 23:28:42 -0700 | [diff] [blame] | 716 | if (is_bad_inode(inode)) |
Chuck Lever | 412d582 | 2005-08-18 11:24:11 -0700 | [diff] [blame] | 717 | goto out; |
Trond Myklebust | 7fdc49c | 2007-09-28 19:11:33 -0400 | [diff] [blame] | 718 | if (NFS_STALE(inode)) |
| 719 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 720 | |
Trond Myklebust | 691beb1 | 2008-10-05 14:48:22 -0400 | [diff] [blame] | 721 | nfs_inc_stats(inode, NFSIOS_INODEREVALIDATE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 722 | status = NFS_PROTO(inode)->getattr(server, NFS_FH(inode), &fattr); |
| 723 | if (status != 0) { |
| 724 | dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) getattr failed, error=%d\n", |
| 725 | inode->i_sb->s_id, |
| 726 | (long long)NFS_FILEID(inode), status); |
| 727 | if (status == -ESTALE) { |
| 728 | nfs_zap_caches(inode); |
| 729 | if (!S_ISDIR(inode->i_mode)) |
Benny Halevy | 3a10c30 | 2008-01-23 08:58:59 +0200 | [diff] [blame] | 730 | set_bit(NFS_INO_STALE, &NFS_I(inode)->flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 731 | } |
| 732 | goto out; |
| 733 | } |
| 734 | |
Trond Myklebust | 4dc05ef | 2008-09-23 17:28:42 -0400 | [diff] [blame] | 735 | status = nfs_refresh_inode(inode, &fattr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 736 | if (status) { |
| 737 | dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) refresh failed, error=%d\n", |
| 738 | inode->i_sb->s_id, |
| 739 | (long long)NFS_FILEID(inode), status); |
| 740 | goto out; |
| 741 | } |
Chuck Lever | 5529680 | 2005-08-18 11:24:09 -0700 | [diff] [blame] | 742 | |
Trond Myklebust | 24aa1fe | 2005-12-03 15:20:07 -0500 | [diff] [blame] | 743 | if (nfsi->cache_validity & NFS_INO_INVALID_ACL) |
Trond Myklebust | ada70d9 | 2005-06-22 17:16:22 +0000 | [diff] [blame] | 744 | nfs_zap_acl_cache(inode); |
Chuck Lever | 5529680 | 2005-08-18 11:24:09 -0700 | [diff] [blame] | 745 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 746 | dfprintk(PAGECACHE, "NFS: (%s/%Ld) revalidation complete\n", |
| 747 | inode->i_sb->s_id, |
| 748 | (long long)NFS_FILEID(inode)); |
| 749 | |
Chuck Lever | 412d582 | 2005-08-18 11:24:11 -0700 | [diff] [blame] | 750 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 751 | return status; |
| 752 | } |
| 753 | |
| 754 | int nfs_attribute_timeout(struct inode *inode) |
| 755 | { |
| 756 | struct nfs_inode *nfsi = NFS_I(inode); |
| 757 | |
| 758 | if (nfs_have_delegation(inode, FMODE_READ)) |
| 759 | return 0; |
Peter Staubach | 64672d5 | 2008-12-23 15:21:56 -0500 | [diff] [blame] | 760 | return !time_in_range_open(jiffies, nfsi->read_cache_jiffies, nfsi->read_cache_jiffies + nfsi->attrtimeo); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 761 | } |
| 762 | |
| 763 | /** |
| 764 | * nfs_revalidate_inode - Revalidate the inode attributes |
| 765 | * @server - pointer to nfs_server struct |
| 766 | * @inode - pointer to inode struct |
| 767 | * |
| 768 | * Updates inode attribute information by retrieving the data from the server. |
| 769 | */ |
| 770 | int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) |
| 771 | { |
Trond Myklebust | 44b1187 | 2006-05-25 01:40:59 -0400 | [diff] [blame] | 772 | if (!(NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATTR) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 773 | && !nfs_attribute_timeout(inode)) |
| 774 | return NFS_STALE(inode) ? -ESTALE : 0; |
| 775 | return __nfs_revalidate_inode(server, inode); |
| 776 | } |
| 777 | |
Trond Myklebust | 717d44e | 2007-01-24 11:54:55 -0800 | [diff] [blame] | 778 | static int nfs_invalidate_mapping_nolock(struct inode *inode, struct address_space *mapping) |
| 779 | { |
| 780 | struct nfs_inode *nfsi = NFS_I(inode); |
| 781 | |
| 782 | if (mapping->nrpages != 0) { |
| 783 | int ret = invalidate_inode_pages2(mapping); |
| 784 | if (ret < 0) |
| 785 | return ret; |
| 786 | } |
| 787 | spin_lock(&inode->i_lock); |
| 788 | nfsi->cache_validity &= ~NFS_INO_INVALID_DATA; |
Trond Myklebust | 2f78e43 | 2007-09-30 15:31:19 -0400 | [diff] [blame] | 789 | if (S_ISDIR(inode->i_mode)) |
Trond Myklebust | 717d44e | 2007-01-24 11:54:55 -0800 | [diff] [blame] | 790 | memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf)); |
Trond Myklebust | 717d44e | 2007-01-24 11:54:55 -0800 | [diff] [blame] | 791 | spin_unlock(&inode->i_lock); |
| 792 | nfs_inc_stats(inode, NFSIOS_DATAINVALIDATE); |
David Howells | ef79c09 | 2009-04-03 16:42:43 +0100 | [diff] [blame] | 793 | nfs_fscache_reset_inode_cookie(inode); |
Trond Myklebust | 717d44e | 2007-01-24 11:54:55 -0800 | [diff] [blame] | 794 | dfprintk(PAGECACHE, "NFS: (%s/%Ld) data cache invalidated\n", |
| 795 | inode->i_sb->s_id, (long long)NFS_FILEID(inode)); |
| 796 | return 0; |
| 797 | } |
| 798 | |
| 799 | static int nfs_invalidate_mapping(struct inode *inode, struct address_space *mapping) |
| 800 | { |
| 801 | int ret = 0; |
| 802 | |
| 803 | mutex_lock(&inode->i_mutex); |
| 804 | if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_DATA) { |
| 805 | ret = nfs_sync_mapping(mapping); |
| 806 | if (ret == 0) |
| 807 | ret = nfs_invalidate_mapping_nolock(inode, mapping); |
| 808 | } |
| 809 | mutex_unlock(&inode->i_mutex); |
| 810 | return ret; |
| 811 | } |
| 812 | |
| 813 | /** |
| 814 | * nfs_revalidate_mapping_nolock - Revalidate the pagecache |
| 815 | * @inode - pointer to host inode |
| 816 | * @mapping - pointer to mapping |
| 817 | */ |
| 818 | int nfs_revalidate_mapping_nolock(struct inode *inode, struct address_space *mapping) |
| 819 | { |
| 820 | struct nfs_inode *nfsi = NFS_I(inode); |
| 821 | int ret = 0; |
| 822 | |
| 823 | if ((nfsi->cache_validity & NFS_INO_REVAL_PAGECACHE) |
| 824 | || nfs_attribute_timeout(inode) || NFS_STALE(inode)) { |
| 825 | ret = __nfs_revalidate_inode(NFS_SERVER(inode), inode); |
| 826 | if (ret < 0) |
| 827 | goto out; |
| 828 | } |
| 829 | if (nfsi->cache_validity & NFS_INO_INVALID_DATA) |
| 830 | ret = nfs_invalidate_mapping_nolock(inode, mapping); |
| 831 | out: |
| 832 | return ret; |
| 833 | } |
| 834 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 835 | /** |
Trond Myklebust | 7d52e86 | 2005-06-22 17:16:30 +0000 | [diff] [blame] | 836 | * nfs_revalidate_mapping - Revalidate the pagecache |
| 837 | * @inode - pointer to host inode |
| 838 | * @mapping - pointer to mapping |
Trond Myklebust | 717d44e | 2007-01-24 11:54:55 -0800 | [diff] [blame] | 839 | * |
| 840 | * This version of the function will take the inode->i_mutex and attempt to |
| 841 | * 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] | 842 | */ |
Trond Myklebust | 44b1187 | 2006-05-25 01:40:59 -0400 | [diff] [blame] | 843 | int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping) |
Trond Myklebust | 7d52e86 | 2005-06-22 17:16:30 +0000 | [diff] [blame] | 844 | { |
| 845 | struct nfs_inode *nfsi = NFS_I(inode); |
Trond Myklebust | 44b1187 | 2006-05-25 01:40:59 -0400 | [diff] [blame] | 846 | int ret = 0; |
| 847 | |
Trond Myklebust | 44b1187 | 2006-05-25 01:40:59 -0400 | [diff] [blame] | 848 | if ((nfsi->cache_validity & NFS_INO_REVAL_PAGECACHE) |
Trond Myklebust | 717d44e | 2007-01-24 11:54:55 -0800 | [diff] [blame] | 849 | || nfs_attribute_timeout(inode) || NFS_STALE(inode)) { |
Trond Myklebust | 44b1187 | 2006-05-25 01:40:59 -0400 | [diff] [blame] | 850 | ret = __nfs_revalidate_inode(NFS_SERVER(inode), inode); |
Trond Myklebust | 717d44e | 2007-01-24 11:54:55 -0800 | [diff] [blame] | 851 | if (ret < 0) |
| 852 | goto out; |
Trond Myklebust | 7d52e86 | 2005-06-22 17:16:30 +0000 | [diff] [blame] | 853 | } |
Trond Myklebust | 717d44e | 2007-01-24 11:54:55 -0800 | [diff] [blame] | 854 | if (nfsi->cache_validity & NFS_INO_INVALID_DATA) |
| 855 | ret = nfs_invalidate_mapping(inode, mapping); |
Trond Myklebust | cd9ae2b | 2006-10-19 23:28:40 -0700 | [diff] [blame] | 856 | out: |
Trond Myklebust | 44b1187 | 2006-05-25 01:40:59 -0400 | [diff] [blame] | 857 | return ret; |
Trond Myklebust | 7d52e86 | 2005-06-22 17:16:30 +0000 | [diff] [blame] | 858 | } |
| 859 | |
Trond Myklebust | a895b4a | 2006-01-03 09:55:40 +0100 | [diff] [blame] | 860 | static void nfs_wcc_update_inode(struct inode *inode, struct nfs_fattr *fattr) |
| 861 | { |
| 862 | struct nfs_inode *nfsi = NFS_I(inode); |
| 863 | |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 864 | if ((fattr->valid & NFS_ATTR_FATTR_PRECHANGE) |
| 865 | && (fattr->valid & NFS_ATTR_FATTR_CHANGE) |
| 866 | && nfsi->change_attr == fattr->pre_change_attr) { |
Trond Myklebust | 70ca885 | 2007-09-30 15:21:24 -0400 | [diff] [blame] | 867 | nfsi->change_attr = fattr->change_attr; |
| 868 | if (S_ISDIR(inode->i_mode)) |
| 869 | nfsi->cache_validity |= NFS_INO_INVALID_DATA; |
| 870 | } |
Trond Myklebust | a895b4a | 2006-01-03 09:55:40 +0100 | [diff] [blame] | 871 | /* If we have atomic WCC data, we may update some attributes */ |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 872 | if ((fattr->valid & NFS_ATTR_FATTR_PRECTIME) |
| 873 | && (fattr->valid & NFS_ATTR_FATTR_CTIME) |
| 874 | && timespec_equal(&inode->i_ctime, &fattr->pre_ctime)) |
Trond Myklebust | a895b4a | 2006-01-03 09:55:40 +0100 | [diff] [blame] | 875 | memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime)); |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 876 | |
| 877 | if ((fattr->valid & NFS_ATTR_FATTR_PREMTIME) |
| 878 | && (fattr->valid & NFS_ATTR_FATTR_MTIME) |
| 879 | && timespec_equal(&inode->i_mtime, &fattr->pre_mtime)) { |
Trond Myklebust | a895b4a | 2006-01-03 09:55:40 +0100 | [diff] [blame] | 880 | memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime)); |
Trond Myklebust | e323ea4 | 2007-09-30 17:03:25 -0400 | [diff] [blame] | 881 | if (S_ISDIR(inode->i_mode)) |
| 882 | nfsi->cache_validity |= NFS_INO_INVALID_DATA; |
Trond Myklebust | a895b4a | 2006-01-03 09:55:40 +0100 | [diff] [blame] | 883 | } |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 884 | if ((fattr->valid & NFS_ATTR_FATTR_PRESIZE) |
| 885 | && (fattr->valid & NFS_ATTR_FATTR_SIZE) |
| 886 | && i_size_read(inode) == nfs_size_to_loff_t(fattr->pre_size) |
| 887 | && nfsi->npages == 0) |
| 888 | i_size_write(inode, nfs_size_to_loff_t(fattr->size)); |
Trond Myklebust | a895b4a | 2006-01-03 09:55:40 +0100 | [diff] [blame] | 889 | } |
| 890 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 891 | /** |
Trond Myklebust | 3380114 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 892 | * nfs_check_inode_attributes - verify consistency of the inode attribute cache |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 893 | * @inode - pointer to inode |
| 894 | * @fattr - updated attributes |
| 895 | * |
| 896 | * Verifies the attribute cache. If we have just changed the attributes, |
| 897 | * so that fattr carries weak cache consistency data, then it may |
| 898 | * also update the ctime/mtime/change_attribute. |
| 899 | */ |
Trond Myklebust | 3380114 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 900 | 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] | 901 | { |
| 902 | struct nfs_inode *nfsi = NFS_I(inode); |
| 903 | loff_t cur_size, new_isize; |
Trond Myklebust | 2a3f5fd | 2007-10-08 14:26:13 -0400 | [diff] [blame] | 904 | unsigned long invalid = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 905 | |
Chuck Lever | dc59250 | 2005-08-18 11:24:12 -0700 | [diff] [blame] | 906 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 907 | /* Has the inode gone and changed behind our back? */ |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 908 | if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 909 | return -EIO; |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 910 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) |
| 911 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 912 | |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 913 | if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 && |
Trond Myklebust | f1bb0b9 | 2006-05-25 01:40:55 -0400 | [diff] [blame] | 914 | nfsi->change_attr != fattr->change_attr) |
Trond Myklebust | 2a3f5fd | 2007-10-08 14:26:13 -0400 | [diff] [blame] | 915 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 916 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 917 | /* Verify a few of the more important attributes */ |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 918 | if ((fattr->valid & NFS_ATTR_FATTR_MTIME) && !timespec_equal(&inode->i_mtime, &fattr->mtime)) |
Trond Myklebust | 2a3f5fd | 2007-10-08 14:26:13 -0400 | [diff] [blame] | 919 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; |
Trond Myklebust | ca62b9c | 2006-03-20 13:44:07 -0500 | [diff] [blame] | 920 | |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 921 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) { |
| 922 | cur_size = i_size_read(inode); |
| 923 | new_isize = nfs_size_to_loff_t(fattr->size); |
| 924 | if (cur_size != new_isize && nfsi->npages == 0) |
| 925 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; |
| 926 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 927 | |
| 928 | /* Have any file permissions changed? */ |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 929 | if ((fattr->valid & NFS_ATTR_FATTR_MODE) && (inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) |
| 930 | invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; |
| 931 | if ((fattr->valid & NFS_ATTR_FATTR_OWNER) && inode->i_uid != fattr->uid) |
| 932 | invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; |
| 933 | if ((fattr->valid & NFS_ATTR_FATTR_GROUP) && inode->i_gid != fattr->gid) |
Trond Myklebust | 2a3f5fd | 2007-10-08 14:26:13 -0400 | [diff] [blame] | 934 | 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] | 935 | |
| 936 | /* Has the link count changed? */ |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 937 | if ((fattr->valid & NFS_ATTR_FATTR_NLINK) && inode->i_nlink != fattr->nlink) |
Trond Myklebust | 2a3f5fd | 2007-10-08 14:26:13 -0400 | [diff] [blame] | 938 | invalid |= NFS_INO_INVALID_ATTR; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 939 | |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 940 | if ((fattr->valid & NFS_ATTR_FATTR_ATIME) && !timespec_equal(&inode->i_atime, &fattr->atime)) |
Trond Myklebust | 2a3f5fd | 2007-10-08 14:26:13 -0400 | [diff] [blame] | 941 | invalid |= NFS_INO_INVALID_ATIME; |
| 942 | |
| 943 | if (invalid != 0) |
| 944 | nfsi->cache_validity |= invalid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 945 | |
Trond Myklebust | 3380114 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 946 | nfsi->read_cache_jiffies = fattr->time_start; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 947 | return 0; |
| 948 | } |
| 949 | |
Trond Myklebust | a10ad17 | 2008-09-23 17:28:41 -0400 | [diff] [blame] | 950 | static int nfs_ctime_need_update(const struct inode *inode, const struct nfs_fattr *fattr) |
| 951 | { |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 952 | if (!(fattr->valid & NFS_ATTR_FATTR_CTIME)) |
| 953 | return 0; |
Trond Myklebust | a10ad17 | 2008-09-23 17:28:41 -0400 | [diff] [blame] | 954 | return timespec_compare(&fattr->ctime, &inode->i_ctime) > 0; |
| 955 | } |
| 956 | |
| 957 | static int nfs_size_need_update(const struct inode *inode, const struct nfs_fattr *fattr) |
| 958 | { |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 959 | if (!(fattr->valid & NFS_ATTR_FATTR_SIZE)) |
| 960 | return 0; |
Trond Myklebust | a10ad17 | 2008-09-23 17:28:41 -0400 | [diff] [blame] | 961 | return nfs_size_to_loff_t(fattr->size) > i_size_read(inode); |
| 962 | } |
| 963 | |
Trond Myklebust | ae05f26 | 2008-10-28 15:21:40 -0400 | [diff] [blame] | 964 | static atomic_long_t nfs_attr_generation_counter; |
Trond Myklebust | 4704f0e | 2008-10-14 19:16:07 -0400 | [diff] [blame] | 965 | |
| 966 | static unsigned long nfs_read_attr_generation_counter(void) |
| 967 | { |
Trond Myklebust | ae05f26 | 2008-10-28 15:21:40 -0400 | [diff] [blame] | 968 | return atomic_long_read(&nfs_attr_generation_counter); |
Trond Myklebust | 4704f0e | 2008-10-14 19:16:07 -0400 | [diff] [blame] | 969 | } |
| 970 | |
| 971 | unsigned long nfs_inc_attr_generation_counter(void) |
| 972 | { |
Trond Myklebust | ae05f26 | 2008-10-28 15:21:40 -0400 | [diff] [blame] | 973 | return atomic_long_inc_return(&nfs_attr_generation_counter); |
Trond Myklebust | 4704f0e | 2008-10-14 19:16:07 -0400 | [diff] [blame] | 974 | } |
| 975 | |
| 976 | void nfs_fattr_init(struct nfs_fattr *fattr) |
| 977 | { |
| 978 | fattr->valid = 0; |
| 979 | fattr->time_start = jiffies; |
| 980 | fattr->gencount = nfs_inc_attr_generation_counter(); |
| 981 | } |
| 982 | |
Trond Myklebust | a10ad17 | 2008-09-23 17:28:41 -0400 | [diff] [blame] | 983 | /** |
| 984 | * nfs_inode_attrs_need_update - check if the inode attributes need updating |
| 985 | * @inode - pointer to inode |
| 986 | * @fattr - attributes |
| 987 | * |
| 988 | * Attempt to divine whether or not an RPC call reply carrying stale |
| 989 | * attributes got scheduled after another call carrying updated ones. |
| 990 | * |
| 991 | * To do so, the function first assumes that a more recent ctime means |
| 992 | * that the attributes in fattr are newer, however it also attempt to |
| 993 | * catch the case where ctime either didn't change, or went backwards |
| 994 | * (if someone reset the clock on the server) by looking at whether |
| 995 | * or not this RPC call was started after the inode was last updated. |
Trond Myklebust | 4704f0e | 2008-10-14 19:16:07 -0400 | [diff] [blame] | 996 | * Note also the check for wraparound of 'attr_gencount' |
Trond Myklebust | a10ad17 | 2008-09-23 17:28:41 -0400 | [diff] [blame] | 997 | * |
| 998 | * The function returns 'true' if it thinks the attributes in 'fattr' are |
| 999 | * more recent than the ones cached in the inode. |
| 1000 | * |
| 1001 | */ |
| 1002 | static int nfs_inode_attrs_need_update(const struct inode *inode, const struct nfs_fattr *fattr) |
| 1003 | { |
| 1004 | const struct nfs_inode *nfsi = NFS_I(inode); |
| 1005 | |
Trond Myklebust | 4704f0e | 2008-10-14 19:16:07 -0400 | [diff] [blame] | 1006 | return ((long)fattr->gencount - (long)nfsi->attr_gencount) > 0 || |
Trond Myklebust | 03254e6 | 2008-10-09 13:27:55 -0400 | [diff] [blame] | 1007 | nfs_ctime_need_update(inode, fattr) || |
| 1008 | nfs_size_need_update(inode, fattr) || |
Trond Myklebust | 4704f0e | 2008-10-14 19:16:07 -0400 | [diff] [blame] | 1009 | ((long)nfsi->attr_gencount - (long)nfs_read_attr_generation_counter() > 0); |
Trond Myklebust | a10ad17 | 2008-09-23 17:28:41 -0400 | [diff] [blame] | 1010 | } |
| 1011 | |
Trond Myklebust | 870a5be | 2008-10-05 12:07:23 -0400 | [diff] [blame] | 1012 | static int nfs_refresh_inode_locked(struct inode *inode, struct nfs_fattr *fattr) |
| 1013 | { |
Trond Myklebust | a10ad17 | 2008-09-23 17:28:41 -0400 | [diff] [blame] | 1014 | if (nfs_inode_attrs_need_update(inode, fattr)) |
Trond Myklebust | 870a5be | 2008-10-05 12:07:23 -0400 | [diff] [blame] | 1015 | return nfs_update_inode(inode, fattr); |
| 1016 | return nfs_check_inode_attributes(inode, fattr); |
| 1017 | } |
| 1018 | |
Trond Myklebust | 3380114 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 1019 | /** |
| 1020 | * nfs_refresh_inode - try to update the inode attribute cache |
| 1021 | * @inode - pointer to inode |
| 1022 | * @fattr - updated attributes |
| 1023 | * |
| 1024 | * Check that an RPC call that returned attributes has not overlapped with |
| 1025 | * other recent updates of the inode metadata, then decide whether it is |
| 1026 | * safe to do a full update of the inode attributes, or whether just to |
| 1027 | * call nfs_check_inode_attributes. |
| 1028 | */ |
| 1029 | int nfs_refresh_inode(struct inode *inode, struct nfs_fattr *fattr) |
| 1030 | { |
Trond Myklebust | 3380114 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 1031 | int status; |
| 1032 | |
| 1033 | if ((fattr->valid & NFS_ATTR_FATTR) == 0) |
| 1034 | return 0; |
| 1035 | spin_lock(&inode->i_lock); |
Trond Myklebust | 870a5be | 2008-10-05 12:07:23 -0400 | [diff] [blame] | 1036 | status = nfs_refresh_inode_locked(inode, fattr); |
Trond Myklebust | 3380114 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 1037 | spin_unlock(&inode->i_lock); |
David Howells | ef79c09 | 2009-04-03 16:42:43 +0100 | [diff] [blame] | 1038 | |
Trond Myklebust | 3380114 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 1039 | return status; |
| 1040 | } |
| 1041 | |
Trond Myklebust | d65f557 | 2008-10-05 12:27:55 -0400 | [diff] [blame] | 1042 | static int nfs_post_op_update_inode_locked(struct inode *inode, struct nfs_fattr *fattr) |
| 1043 | { |
| 1044 | struct nfs_inode *nfsi = NFS_I(inode); |
| 1045 | |
| 1046 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; |
| 1047 | if (S_ISDIR(inode->i_mode)) |
| 1048 | nfsi->cache_validity |= NFS_INO_INVALID_DATA; |
| 1049 | if ((fattr->valid & NFS_ATTR_FATTR) == 0) |
| 1050 | return 0; |
| 1051 | return nfs_refresh_inode_locked(inode, fattr); |
| 1052 | } |
| 1053 | |
Trond Myklebust | decf491 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 1054 | /** |
| 1055 | * nfs_post_op_update_inode - try to update the inode attribute cache |
| 1056 | * @inode - pointer to inode |
| 1057 | * @fattr - updated attributes |
| 1058 | * |
| 1059 | * After an operation that has changed the inode metadata, mark the |
| 1060 | * attribute cache as being invalid, then try to update it. |
Chuck Lever | f551e44 | 2006-09-20 14:33:04 -0400 | [diff] [blame] | 1061 | * |
| 1062 | * NB: if the server didn't return any post op attributes, this |
| 1063 | * function will force the retrieval of attributes before the next |
| 1064 | * NFS request. Thus it should be used only for operations that |
| 1065 | * are expected to change one or more attributes, to avoid |
| 1066 | * unnecessary NFS requests and trips through nfs_update_inode(). |
Trond Myklebust | decf491 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 1067 | */ |
| 1068 | int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr) |
| 1069 | { |
Trond Myklebust | d65f557 | 2008-10-05 12:27:55 -0400 | [diff] [blame] | 1070 | int status; |
Trond Myklebust | decf491 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 1071 | |
Trond Myklebust | 7668fdb | 2007-10-01 09:59:15 -0400 | [diff] [blame] | 1072 | spin_lock(&inode->i_lock); |
Trond Myklebust | d65f557 | 2008-10-05 12:27:55 -0400 | [diff] [blame] | 1073 | status = nfs_post_op_update_inode_locked(inode, fattr); |
Trond Myklebust | 7668fdb | 2007-10-01 09:59:15 -0400 | [diff] [blame] | 1074 | spin_unlock(&inode->i_lock); |
Trond Myklebust | 870a5be | 2008-10-05 12:07:23 -0400 | [diff] [blame] | 1075 | return status; |
Trond Myklebust | decf491 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 1076 | } |
| 1077 | |
Trond Myklebust | 70ca885 | 2007-09-30 15:21:24 -0400 | [diff] [blame] | 1078 | /** |
| 1079 | * nfs_post_op_update_inode_force_wcc - try to update the inode attribute cache |
| 1080 | * @inode - pointer to inode |
| 1081 | * @fattr - updated attributes |
| 1082 | * |
| 1083 | * After an operation that has changed the inode metadata, mark the |
| 1084 | * attribute cache as being invalid, then try to update it. Fake up |
| 1085 | * weak cache consistency data, if none exist. |
| 1086 | * |
| 1087 | * This function is mainly designed to be used by the ->write_done() functions. |
| 1088 | */ |
| 1089 | int nfs_post_op_update_inode_force_wcc(struct inode *inode, struct nfs_fattr *fattr) |
| 1090 | { |
Trond Myklebust | d65f557 | 2008-10-05 12:27:55 -0400 | [diff] [blame] | 1091 | int status; |
| 1092 | |
| 1093 | spin_lock(&inode->i_lock); |
| 1094 | /* Don't do a WCC update if these attributes are already stale */ |
| 1095 | if ((fattr->valid & NFS_ATTR_FATTR) == 0 || |
| 1096 | !nfs_inode_attrs_need_update(inode, fattr)) { |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1097 | fattr->valid &= ~(NFS_ATTR_FATTR_PRECHANGE |
| 1098 | | NFS_ATTR_FATTR_PRESIZE |
| 1099 | | NFS_ATTR_FATTR_PREMTIME |
| 1100 | | NFS_ATTR_FATTR_PRECTIME); |
Trond Myklebust | d65f557 | 2008-10-05 12:27:55 -0400 | [diff] [blame] | 1101 | goto out_noforce; |
| 1102 | } |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1103 | if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 && |
| 1104 | (fattr->valid & NFS_ATTR_FATTR_PRECHANGE) == 0) { |
Trond Myklebust | 70ca885 | 2007-09-30 15:21:24 -0400 | [diff] [blame] | 1105 | fattr->pre_change_attr = NFS_I(inode)->change_attr; |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1106 | fattr->valid |= NFS_ATTR_FATTR_PRECHANGE; |
Trond Myklebust | 70ca885 | 2007-09-30 15:21:24 -0400 | [diff] [blame] | 1107 | } |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1108 | if ((fattr->valid & NFS_ATTR_FATTR_CTIME) != 0 && |
| 1109 | (fattr->valid & NFS_ATTR_FATTR_PRECTIME) == 0) { |
Trond Myklebust | 70ca885 | 2007-09-30 15:21:24 -0400 | [diff] [blame] | 1110 | memcpy(&fattr->pre_ctime, &inode->i_ctime, sizeof(fattr->pre_ctime)); |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1111 | fattr->valid |= NFS_ATTR_FATTR_PRECTIME; |
| 1112 | } |
| 1113 | if ((fattr->valid & NFS_ATTR_FATTR_MTIME) != 0 && |
| 1114 | (fattr->valid & NFS_ATTR_FATTR_PREMTIME) == 0) { |
Trond Myklebust | 70ca885 | 2007-09-30 15:21:24 -0400 | [diff] [blame] | 1115 | memcpy(&fattr->pre_mtime, &inode->i_mtime, sizeof(fattr->pre_mtime)); |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1116 | fattr->valid |= NFS_ATTR_FATTR_PREMTIME; |
| 1117 | } |
| 1118 | if ((fattr->valid & NFS_ATTR_FATTR_SIZE) != 0 && |
| 1119 | (fattr->valid & NFS_ATTR_FATTR_PRESIZE) == 0) { |
Trond Myklebust | a3d0145 | 2008-06-11 12:21:19 -0400 | [diff] [blame] | 1120 | fattr->pre_size = i_size_read(inode); |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1121 | fattr->valid |= NFS_ATTR_FATTR_PRESIZE; |
Trond Myklebust | 70ca885 | 2007-09-30 15:21:24 -0400 | [diff] [blame] | 1122 | } |
Trond Myklebust | d65f557 | 2008-10-05 12:27:55 -0400 | [diff] [blame] | 1123 | out_noforce: |
| 1124 | status = nfs_post_op_update_inode_locked(inode, fattr); |
| 1125 | spin_unlock(&inode->i_lock); |
| 1126 | return status; |
Trond Myklebust | 70ca885 | 2007-09-30 15:21:24 -0400 | [diff] [blame] | 1127 | } |
| 1128 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1129 | /* |
| 1130 | * Many nfs protocol calls return the new file attributes after |
| 1131 | * an operation. Here we update the inode to reflect the state |
| 1132 | * of the server's inode. |
| 1133 | * |
| 1134 | * This is a bit tricky because we have to make sure all dirty pages |
| 1135 | * have been sent off to the server before calling invalidate_inode_pages. |
| 1136 | * To make sure no other process adds more write requests while we try |
| 1137 | * our best to flush them, we make them sleep during the attribute refresh. |
| 1138 | * |
| 1139 | * A very similar scenario holds for the dir cache. |
| 1140 | */ |
Trond Myklebust | 24aa1fe | 2005-12-03 15:20:07 -0500 | [diff] [blame] | 1141 | static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1142 | { |
Trond Myklebust | 8b4bdcf | 2006-06-09 09:34:19 -0400 | [diff] [blame] | 1143 | struct nfs_server *server; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1144 | struct nfs_inode *nfsi = NFS_I(inode); |
Trond Myklebust | 951a143 | 2005-06-22 17:16:30 +0000 | [diff] [blame] | 1145 | loff_t cur_isize, new_isize; |
Trond Myklebust | 2a3f5fd | 2007-10-08 14:26:13 -0400 | [diff] [blame] | 1146 | unsigned long invalid = 0; |
Trond Myklebust | 3e7d950 | 2007-02-05 14:26:28 -0800 | [diff] [blame] | 1147 | unsigned long now = jiffies; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1148 | |
| 1149 | dfprintk(VFS, "NFS: %s(%s/%ld ct=%d info=0x%x)\n", |
Harvey Harrison | 3110ff8 | 2008-05-02 13:42:44 -0700 | [diff] [blame] | 1150 | __func__, inode->i_sb->s_id, inode->i_ino, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1151 | atomic_read(&inode->i_count), fattr->valid); |
| 1152 | |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1153 | if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid) |
Chuck Lever | 325cfed | 2005-11-30 18:08:55 -0500 | [diff] [blame] | 1154 | goto out_fileid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1155 | |
| 1156 | /* |
| 1157 | * Make sure the inode's type hasn't changed. |
| 1158 | */ |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1159 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1160 | goto out_changed; |
| 1161 | |
Trond Myklebust | 8b4bdcf | 2006-06-09 09:34:19 -0400 | [diff] [blame] | 1162 | server = NFS_SERVER(inode); |
Trond Myklebust | a035686 | 2007-06-05 13:26:15 -0400 | [diff] [blame] | 1163 | /* Update the fsid? */ |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1164 | if (S_ISDIR(inode->i_mode) && (fattr->valid & NFS_ATTR_FATTR_FSID) && |
Trond Myklebust | c37dcd33 | 2008-03-06 12:34:50 -0500 | [diff] [blame] | 1165 | !nfs_fsid_equal(&server->fsid, &fattr->fsid) && |
| 1166 | !test_bit(NFS_INO_MOUNTPOINT, &nfsi->flags)) |
Trond Myklebust | 8b4bdcf | 2006-06-09 09:34:19 -0400 | [diff] [blame] | 1167 | server->fsid = fattr->fsid; |
| 1168 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1169 | /* |
| 1170 | * Update the read time so we don't revalidate too often. |
| 1171 | */ |
Trond Myklebust | 3380114 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 1172 | nfsi->read_cache_jiffies = fattr->time_start; |
Trond Myklebust | 3e7d950 | 2007-02-05 14:26:28 -0800 | [diff] [blame] | 1173 | |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1174 | if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) || (fattr->valid & (NFS_ATTR_FATTR_MTIME|NFS_ATTR_FATTR_CTIME))) |
| 1175 | nfsi->cache_validity &= ~(NFS_INO_INVALID_ATTR |
| 1176 | | NFS_INO_INVALID_ATIME |
| 1177 | | NFS_INO_REVAL_PAGECACHE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1178 | |
Trond Myklebust | a895b4a | 2006-01-03 09:55:40 +0100 | [diff] [blame] | 1179 | /* Do atomic weak cache consistency updates */ |
| 1180 | nfs_wcc_update_inode(inode, fattr); |
| 1181 | |
Trond Myklebust | 47aabaa | 2007-09-27 15:57:24 -0400 | [diff] [blame] | 1182 | /* More cache consistency checks */ |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1183 | if (fattr->valid & NFS_ATTR_FATTR_CHANGE) { |
| 1184 | if (nfsi->change_attr != fattr->change_attr) { |
| 1185 | dprintk("NFS: change_attr change on server for file %s/%ld\n", |
| 1186 | inode->i_sb->s_id, inode->i_ino); |
| 1187 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
| 1188 | if (S_ISDIR(inode->i_mode)) |
| 1189 | nfs_force_lookup_revalidate(inode); |
| 1190 | nfsi->change_attr = fattr->change_attr; |
| 1191 | } |
| 1192 | } |
| 1193 | |
| 1194 | if (fattr->valid & NFS_ATTR_FATTR_MTIME) { |
Trond Myklebust | 47aabaa | 2007-09-27 15:57:24 -0400 | [diff] [blame] | 1195 | /* NFSv2/v3: Check if the mtime agrees */ |
| 1196 | if (!timespec_equal(&inode->i_mtime, &fattr->mtime)) { |
| 1197 | dprintk("NFS: mtime change on server for file %s/%ld\n", |
| 1198 | inode->i_sb->s_id, inode->i_ino); |
| 1199 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA; |
Trond Myklebust | bfc69a4 | 2007-10-15 18:18:29 -0400 | [diff] [blame] | 1200 | if (S_ISDIR(inode->i_mode)) |
| 1201 | nfs_force_lookup_revalidate(inode); |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1202 | memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime)); |
Trond Myklebust | 47aabaa | 2007-09-27 15:57:24 -0400 | [diff] [blame] | 1203 | } |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1204 | } |
| 1205 | if (fattr->valid & NFS_ATTR_FATTR_CTIME) { |
Trond Myklebust | 47aabaa | 2007-09-27 15:57:24 -0400 | [diff] [blame] | 1206 | /* If ctime has changed we should definitely clear access+acl caches */ |
NeilBrown | 37d9d76 | 2009-03-11 14:10:23 -0400 | [diff] [blame] | 1207 | if (!timespec_equal(&inode->i_ctime, &fattr->ctime)) { |
Trond Myklebust | 4704f0e | 2008-10-14 19:16:07 -0400 | [diff] [blame] | 1208 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
NeilBrown | 37d9d76 | 2009-03-11 14:10:23 -0400 | [diff] [blame] | 1209 | /* and probably clear data for a directory too as utimes can cause |
| 1210 | * havoc with our cache. |
| 1211 | */ |
| 1212 | if (S_ISDIR(inode->i_mode)) { |
| 1213 | invalid |= NFS_INO_INVALID_DATA; |
| 1214 | nfs_force_lookup_revalidate(inode); |
| 1215 | } |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1216 | memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime)); |
NeilBrown | 37d9d76 | 2009-03-11 14:10:23 -0400 | [diff] [blame] | 1217 | } |
Trond Myklebust | 47aabaa | 2007-09-27 15:57:24 -0400 | [diff] [blame] | 1218 | } |
| 1219 | |
Trond Myklebust | 951a143 | 2005-06-22 17:16:30 +0000 | [diff] [blame] | 1220 | /* Check if our cached file size is stale */ |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1221 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) { |
| 1222 | new_isize = nfs_size_to_loff_t(fattr->size); |
| 1223 | cur_isize = i_size_read(inode); |
| 1224 | if (new_isize != cur_isize) { |
| 1225 | /* Do we perhaps have any outstanding writes, or has |
| 1226 | * the file grown beyond our last write? */ |
| 1227 | if (nfsi->npages == 0 || new_isize > cur_isize) { |
| 1228 | i_size_write(inode, new_isize); |
| 1229 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA; |
| 1230 | } |
| 1231 | dprintk("NFS: isize change on server for file %s/%ld\n", |
| 1232 | inode->i_sb->s_id, inode->i_ino); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1233 | } |
| 1234 | } |
| 1235 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1236 | |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1237 | if (fattr->valid & NFS_ATTR_FATTR_ATIME) |
| 1238 | memcpy(&inode->i_atime, &fattr->atime, sizeof(inode->i_atime)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1239 | |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1240 | if (fattr->valid & NFS_ATTR_FATTR_MODE) { |
| 1241 | if ((inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) { |
| 1242 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
| 1243 | inode->i_mode = fattr->mode; |
| 1244 | } |
| 1245 | } |
| 1246 | if (fattr->valid & NFS_ATTR_FATTR_OWNER) { |
| 1247 | if (inode->i_uid != fattr->uid) { |
| 1248 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
| 1249 | inode->i_uid = fattr->uid; |
| 1250 | } |
| 1251 | } |
| 1252 | if (fattr->valid & NFS_ATTR_FATTR_GROUP) { |
| 1253 | if (inode->i_gid != fattr->gid) { |
| 1254 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
| 1255 | inode->i_gid = fattr->gid; |
| 1256 | } |
NeilBrown | 37d9d76 | 2009-03-11 14:10:23 -0400 | [diff] [blame] | 1257 | } |
Trond Myklebust | 921615f | 2008-10-14 19:23:07 -0400 | [diff] [blame] | 1258 | |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1259 | if (fattr->valid & NFS_ATTR_FATTR_NLINK) { |
| 1260 | if (inode->i_nlink != fattr->nlink) { |
| 1261 | invalid |= NFS_INO_INVALID_ATTR; |
| 1262 | if (S_ISDIR(inode->i_mode)) |
| 1263 | invalid |= NFS_INO_INVALID_DATA; |
| 1264 | inode->i_nlink = fattr->nlink; |
| 1265 | } |
| 1266 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1267 | |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1268 | if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1269 | /* |
| 1270 | * report the blocks in 512byte units |
| 1271 | */ |
| 1272 | inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1273 | } |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1274 | if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED) |
| 1275 | inode->i_blocks = fattr->du.nfs2.blocks; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1276 | |
| 1277 | /* Update attrtimeo value if we're out of the unstable period */ |
| 1278 | if (invalid & NFS_INO_INVALID_ATTR) { |
Chuck Lever | 91d5b47 | 2006-03-20 13:44:14 -0500 | [diff] [blame] | 1279 | nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1280 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); |
Trond Myklebust | 3e7d950 | 2007-02-05 14:26:28 -0800 | [diff] [blame] | 1281 | nfsi->attrtimeo_timestamp = now; |
Trond Myklebust | 4704f0e | 2008-10-14 19:16:07 -0400 | [diff] [blame] | 1282 | nfsi->attr_gencount = nfs_inc_attr_generation_counter(); |
Trond Myklebust | 6d2b296 | 2007-10-01 18:57:50 -0400 | [diff] [blame] | 1283 | } else { |
Peter Staubach | 64672d5 | 2008-12-23 15:21:56 -0500 | [diff] [blame] | 1284 | if (!time_in_range_open(now, nfsi->attrtimeo_timestamp, nfsi->attrtimeo_timestamp + nfsi->attrtimeo)) { |
Trond Myklebust | 6d2b296 | 2007-10-01 18:57:50 -0400 | [diff] [blame] | 1285 | if ((nfsi->attrtimeo <<= 1) > NFS_MAXATTRTIMEO(inode)) |
| 1286 | nfsi->attrtimeo = NFS_MAXATTRTIMEO(inode); |
| 1287 | nfsi->attrtimeo_timestamp = now; |
| 1288 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1289 | } |
Trond Myklebust | f2115dc | 2007-08-15 12:49:17 -0400 | [diff] [blame] | 1290 | invalid &= ~NFS_INO_INVALID_ATTR; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1291 | /* Don't invalidate the data if we were to blame */ |
| 1292 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) |
| 1293 | || S_ISLNK(inode->i_mode))) |
| 1294 | invalid &= ~NFS_INO_INVALID_DATA; |
Trond Myklebust | 412c77c | 2007-07-03 16:10:55 -0400 | [diff] [blame] | 1295 | if (!nfs_have_delegation(inode, FMODE_READ) || |
| 1296 | (nfsi->cache_validity & NFS_INO_REVAL_FORCED)) |
Chuck Lever | 5529680 | 2005-08-18 11:24:09 -0700 | [diff] [blame] | 1297 | nfsi->cache_validity |= invalid; |
Trond Myklebust | 412c77c | 2007-07-03 16:10:55 -0400 | [diff] [blame] | 1298 | nfsi->cache_validity &= ~NFS_INO_REVAL_FORCED; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1299 | |
| 1300 | return 0; |
| 1301 | out_changed: |
| 1302 | /* |
| 1303 | * Big trouble! The inode has become a different object. |
| 1304 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1305 | printk(KERN_DEBUG "%s: inode %ld mode changed, %07o to %07o\n", |
Harvey Harrison | 3110ff8 | 2008-05-02 13:42:44 -0700 | [diff] [blame] | 1306 | __func__, inode->i_ino, inode->i_mode, fattr->mode); |
Trond Myklebust | b37b03b | 2005-11-25 17:10:06 -0500 | [diff] [blame] | 1307 | out_err: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1308 | /* |
| 1309 | * No need to worry about unhashing the dentry, as the |
| 1310 | * lookup validation will know that the inode is bad. |
| 1311 | * (But we fall through to invalidate the caches.) |
| 1312 | */ |
| 1313 | nfs_invalidate_inode(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1314 | return -ESTALE; |
Chuck Lever | 325cfed | 2005-11-30 18:08:55 -0500 | [diff] [blame] | 1315 | |
| 1316 | out_fileid: |
| 1317 | printk(KERN_ERR "NFS: server %s error: fileid changed\n" |
| 1318 | "fsid %s: expected fileid 0x%Lx, got 0x%Lx\n", |
David Howells | 54ceac4 | 2006-08-22 20:06:13 -0400 | [diff] [blame] | 1319 | NFS_SERVER(inode)->nfs_client->cl_hostname, inode->i_sb->s_id, |
Chuck Lever | 325cfed | 2005-11-30 18:08:55 -0500 | [diff] [blame] | 1320 | (long long)nfsi->fileid, (long long)fattr->fileid); |
| 1321 | goto out_err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1322 | } |
| 1323 | |
Trond Myklebust | 55a9759 | 2006-06-09 09:34:19 -0400 | [diff] [blame] | 1324 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1325 | #ifdef CONFIG_NFS_V4 |
| 1326 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1327 | /* |
| 1328 | * Clean out any remaining NFSv4 state that might be left over due |
| 1329 | * to open() calls that passed nfs_atomic_lookup, but failed to call |
| 1330 | * nfs_open(). |
| 1331 | */ |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 1332 | void nfs4_clear_inode(struct inode *inode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1333 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1334 | /* If we are holding a delegation, return it! */ |
Trond Myklebust | e6f8107 | 2008-01-24 18:14:34 -0500 | [diff] [blame] | 1335 | nfs_inode_return_delegation_noreclaim(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1336 | /* First call standard NFS clear_inode() code */ |
| 1337 | nfs_clear_inode(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1338 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1339 | #endif |
| 1340 | |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 1341 | struct inode *nfs_alloc_inode(struct super_block *sb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1342 | { |
| 1343 | struct nfs_inode *nfsi; |
Christoph Lameter | e94b176 | 2006-12-06 20:33:17 -0800 | [diff] [blame] | 1344 | nfsi = (struct nfs_inode *)kmem_cache_alloc(nfs_inode_cachep, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1345 | if (!nfsi) |
| 1346 | return NULL; |
Chuck Lever | 5529680 | 2005-08-18 11:24:09 -0700 | [diff] [blame] | 1347 | nfsi->flags = 0UL; |
| 1348 | nfsi->cache_validity = 0UL; |
Trond Myklebust | 458818e | 2005-06-22 17:16:27 +0000 | [diff] [blame] | 1349 | #ifdef CONFIG_NFS_V3_ACL |
| 1350 | nfsi->acl_access = ERR_PTR(-EAGAIN); |
| 1351 | nfsi->acl_default = ERR_PTR(-EAGAIN); |
| 1352 | #endif |
J. Bruce Fields | e50a1c2 | 2005-06-22 17:16:23 +0000 | [diff] [blame] | 1353 | #ifdef CONFIG_NFS_V4 |
| 1354 | nfsi->nfs4_acl = NULL; |
| 1355 | #endif /* CONFIG_NFS_V4 */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1356 | return &nfsi->vfs_inode; |
| 1357 | } |
| 1358 | |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 1359 | void nfs_destroy_inode(struct inode *inode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1360 | { |
| 1361 | kmem_cache_free(nfs_inode_cachep, NFS_I(inode)); |
| 1362 | } |
| 1363 | |
Andrew Morton | d75d541 | 2006-06-25 02:41:26 -0700 | [diff] [blame] | 1364 | static inline void nfs4_init_once(struct nfs_inode *nfsi) |
| 1365 | { |
| 1366 | #ifdef CONFIG_NFS_V4 |
| 1367 | INIT_LIST_HEAD(&nfsi->open_states); |
| 1368 | nfsi->delegation = NULL; |
| 1369 | nfsi->delegation_state = 0; |
| 1370 | init_rwsem(&nfsi->rwsem); |
| 1371 | #endif |
| 1372 | } |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 1373 | |
Alexey Dobriyan | 51cc506 | 2008-07-25 19:45:34 -0700 | [diff] [blame] | 1374 | static void init_once(void *foo) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1375 | { |
| 1376 | struct nfs_inode *nfsi = (struct nfs_inode *) foo; |
| 1377 | |
Christoph Lameter | a35afb8 | 2007-05-16 22:10:57 -0700 | [diff] [blame] | 1378 | inode_init_once(&nfsi->vfs_inode); |
Christoph Lameter | a35afb8 | 2007-05-16 22:10:57 -0700 | [diff] [blame] | 1379 | INIT_LIST_HEAD(&nfsi->open_files); |
| 1380 | INIT_LIST_HEAD(&nfsi->access_cache_entry_lru); |
| 1381 | INIT_LIST_HEAD(&nfsi->access_cache_inode_lru); |
| 1382 | INIT_RADIX_TREE(&nfsi->nfs_page_tree, GFP_ATOMIC); |
Christoph Lameter | a35afb8 | 2007-05-16 22:10:57 -0700 | [diff] [blame] | 1383 | nfsi->npages = 0; |
Trond Myklebust | 565277f | 2007-10-15 18:17:53 -0400 | [diff] [blame] | 1384 | atomic_set(&nfsi->silly_count, 1); |
| 1385 | INIT_HLIST_HEAD(&nfsi->silly_list); |
| 1386 | init_waitqueue_head(&nfsi->waitqueue); |
Christoph Lameter | a35afb8 | 2007-05-16 22:10:57 -0700 | [diff] [blame] | 1387 | nfs4_init_once(nfsi); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1388 | } |
Paul Mundt | 20c2df8 | 2007-07-20 10:11:58 +0900 | [diff] [blame] | 1389 | |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 1390 | static int __init nfs_init_inodecache(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1391 | { |
| 1392 | nfs_inode_cachep = kmem_cache_create("nfs_inode_cache", |
| 1393 | sizeof(struct nfs_inode), |
Paul Jackson | fffb60f | 2006-03-24 03:16:06 -0800 | [diff] [blame] | 1394 | 0, (SLAB_RECLAIM_ACCOUNT| |
| 1395 | SLAB_MEM_SPREAD), |
Paul Mundt | 20c2df8 | 2007-07-20 10:11:58 +0900 | [diff] [blame] | 1396 | init_once); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1397 | if (nfs_inode_cachep == NULL) |
| 1398 | return -ENOMEM; |
| 1399 | |
| 1400 | return 0; |
| 1401 | } |
| 1402 | |
David Brownell | 266bee8 | 2006-06-27 12:59:15 -0700 | [diff] [blame] | 1403 | static void nfs_destroy_inodecache(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1404 | { |
Alexey Dobriyan | 1a1d92c | 2006-09-27 01:49:40 -0700 | [diff] [blame] | 1405 | kmem_cache_destroy(nfs_inode_cachep); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1406 | } |
| 1407 | |
Trond Myklebust | 5746006 | 2008-02-19 20:04:22 -0500 | [diff] [blame] | 1408 | struct workqueue_struct *nfsiod_workqueue; |
| 1409 | |
| 1410 | /* |
| 1411 | * start up the nfsiod workqueue |
| 1412 | */ |
| 1413 | static int nfsiod_start(void) |
| 1414 | { |
| 1415 | struct workqueue_struct *wq; |
| 1416 | dprintk("RPC: creating workqueue nfsiod\n"); |
| 1417 | wq = create_singlethread_workqueue("nfsiod"); |
| 1418 | if (wq == NULL) |
| 1419 | return -ENOMEM; |
| 1420 | nfsiod_workqueue = wq; |
| 1421 | return 0; |
| 1422 | } |
| 1423 | |
| 1424 | /* |
| 1425 | * Destroy the nfsiod workqueue |
| 1426 | */ |
| 1427 | static void nfsiod_stop(void) |
| 1428 | { |
| 1429 | struct workqueue_struct *wq; |
| 1430 | |
| 1431 | wq = nfsiod_workqueue; |
| 1432 | if (wq == NULL) |
| 1433 | return; |
| 1434 | nfsiod_workqueue = NULL; |
| 1435 | destroy_workqueue(wq); |
| 1436 | } |
| 1437 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1438 | /* |
| 1439 | * Initialize NFS |
| 1440 | */ |
| 1441 | static int __init init_nfs_fs(void) |
| 1442 | { |
| 1443 | int err; |
| 1444 | |
David Howells | 8ec442a | 2009-04-03 16:42:42 +0100 | [diff] [blame] | 1445 | err = nfs_fscache_register(); |
| 1446 | if (err < 0) |
| 1447 | goto out7; |
| 1448 | |
Trond Myklebust | 5746006 | 2008-02-19 20:04:22 -0500 | [diff] [blame] | 1449 | err = nfsiod_start(); |
| 1450 | if (err) |
| 1451 | goto out6; |
| 1452 | |
David Howells | 6aaca56 | 2006-08-22 20:06:13 -0400 | [diff] [blame] | 1453 | err = nfs_fs_proc_init(); |
| 1454 | if (err) |
| 1455 | goto out5; |
| 1456 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1457 | err = nfs_init_nfspagecache(); |
| 1458 | if (err) |
| 1459 | goto out4; |
| 1460 | |
| 1461 | err = nfs_init_inodecache(); |
| 1462 | if (err) |
| 1463 | goto out3; |
| 1464 | |
| 1465 | err = nfs_init_readpagecache(); |
| 1466 | if (err) |
| 1467 | goto out2; |
| 1468 | |
| 1469 | err = nfs_init_writepagecache(); |
| 1470 | if (err) |
| 1471 | goto out1; |
| 1472 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1473 | err = nfs_init_directcache(); |
| 1474 | if (err) |
| 1475 | goto out0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1476 | |
| 1477 | #ifdef CONFIG_PROC_FS |
| 1478 | rpc_proc_register(&nfs_rpcstat); |
| 1479 | #endif |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 1480 | if ((err = register_nfs_fs()) != 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1481 | goto out; |
| 1482 | return 0; |
| 1483 | out: |
| 1484 | #ifdef CONFIG_PROC_FS |
| 1485 | rpc_proc_unregister("nfs"); |
| 1486 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1487 | nfs_destroy_directcache(); |
Chuck Lever | 6b59a75 | 2005-11-30 18:08:19 -0500 | [diff] [blame] | 1488 | out0: |
Chuck Lever | 6b59a75 | 2005-11-30 18:08:19 -0500 | [diff] [blame] | 1489 | nfs_destroy_writepagecache(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1490 | out1: |
| 1491 | nfs_destroy_readpagecache(); |
| 1492 | out2: |
| 1493 | nfs_destroy_inodecache(); |
| 1494 | out3: |
| 1495 | nfs_destroy_nfspagecache(); |
| 1496 | out4: |
David Howells | 6aaca56 | 2006-08-22 20:06:13 -0400 | [diff] [blame] | 1497 | nfs_fs_proc_exit(); |
| 1498 | out5: |
Trond Myklebust | 5746006 | 2008-02-19 20:04:22 -0500 | [diff] [blame] | 1499 | nfsiod_stop(); |
| 1500 | out6: |
David Howells | 8ec442a | 2009-04-03 16:42:42 +0100 | [diff] [blame] | 1501 | nfs_fscache_unregister(); |
| 1502 | out7: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1503 | return err; |
| 1504 | } |
| 1505 | |
| 1506 | static void __exit exit_nfs_fs(void) |
| 1507 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1508 | nfs_destroy_directcache(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1509 | nfs_destroy_writepagecache(); |
| 1510 | nfs_destroy_readpagecache(); |
| 1511 | nfs_destroy_inodecache(); |
| 1512 | nfs_destroy_nfspagecache(); |
David Howells | 8ec442a | 2009-04-03 16:42:42 +0100 | [diff] [blame] | 1513 | nfs_fscache_unregister(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1514 | #ifdef CONFIG_PROC_FS |
| 1515 | rpc_proc_unregister("nfs"); |
| 1516 | #endif |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 1517 | unregister_nfs_fs(); |
David Howells | 6aaca56 | 2006-08-22 20:06:13 -0400 | [diff] [blame] | 1518 | nfs_fs_proc_exit(); |
Trond Myklebust | 5746006 | 2008-02-19 20:04:22 -0500 | [diff] [blame] | 1519 | nfsiod_stop(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1520 | } |
| 1521 | |
| 1522 | /* Not quite true; I just maintain it */ |
| 1523 | MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>"); |
| 1524 | MODULE_LICENSE("GPL"); |
Trond Myklebust | f43bf0b | 2007-10-09 12:01:04 -0400 | [diff] [blame] | 1525 | module_param(enable_ino64, bool, 0644); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1526 | |
| 1527 | module_init(init_nfs_fs) |
| 1528 | module_exit(exit_nfs_fs) |