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> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 39 | #include <linux/slab.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | |
| 41 | #include <asm/system.h> |
| 42 | #include <asm/uaccess.h> |
| 43 | |
Trond Myklebust | 4ce7971 | 2005-06-22 17:16:21 +0000 | [diff] [blame] | 44 | #include "nfs4_fs.h" |
Trond Myklebust | a72b442 | 2006-01-03 09:55:41 +0100 | [diff] [blame] | 45 | #include "callback.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 46 | #include "delegation.h" |
Chuck Lever | d9ef5a8 | 2006-03-20 13:44:13 -0500 | [diff] [blame] | 47 | #include "iostat.h" |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 48 | #include "internal.h" |
David Howells | 8ec442a | 2009-04-03 16:42:42 +0100 | [diff] [blame] | 49 | #include "fscache.h" |
Trond Myklebust | e571cbf | 2009-08-19 18:12:27 -0400 | [diff] [blame] | 50 | #include "dns_resolve.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 51 | |
| 52 | #define NFSDBG_FACILITY NFSDBG_VFS |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | |
Trond Myklebust | f43bf0b | 2007-10-09 12:01:04 -0400 | [diff] [blame] | 54 | #define NFS_64_BIT_INODE_NUMBERS_ENABLED 1 |
| 55 | |
| 56 | /* Default is to see 64-bit inode numbers */ |
| 57 | static int enable_ino64 = NFS_64_BIT_INODE_NUMBERS_ENABLED; |
| 58 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 59 | static void nfs_invalidate_inode(struct inode *); |
Trond Myklebust | 24aa1fe | 2005-12-03 15:20:07 -0500 | [diff] [blame] | 60 | static int nfs_update_inode(struct inode *, struct nfs_fattr *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 61 | |
Christoph Lameter | e18b890 | 2006-12-06 20:33:20 -0800 | [diff] [blame] | 62 | static struct kmem_cache * nfs_inode_cachep; |
Andreas Gruenbacher | b7fa055 | 2005-06-22 17:16:27 +0000 | [diff] [blame] | 63 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 64 | static inline unsigned long |
| 65 | nfs_fattr_to_ino_t(struct nfs_fattr *fattr) |
| 66 | { |
| 67 | return nfs_fileid_to_ino_t(fattr->fileid); |
| 68 | } |
| 69 | |
Trond Myklebust | f43bf0b | 2007-10-09 12:01:04 -0400 | [diff] [blame] | 70 | /** |
Trond Myklebust | 72cb77f | 2009-03-11 14:10:30 -0400 | [diff] [blame] | 71 | * nfs_wait_bit_killable - helper for functions that are sleeping on bit locks |
| 72 | * @word: long word containing the bit lock |
| 73 | */ |
| 74 | int nfs_wait_bit_killable(void *word) |
| 75 | { |
| 76 | if (fatal_signal_pending(current)) |
| 77 | return -ERESTARTSYS; |
| 78 | schedule(); |
| 79 | return 0; |
| 80 | } |
| 81 | |
| 82 | /** |
Trond Myklebust | f43bf0b | 2007-10-09 12:01:04 -0400 | [diff] [blame] | 83 | * nfs_compat_user_ino64 - returns the user-visible inode number |
| 84 | * @fileid: 64-bit fileid |
| 85 | * |
| 86 | * This function returns a 32-bit inode number if the boot parameter |
| 87 | * nfs.enable_ino64 is zero. |
| 88 | */ |
| 89 | u64 nfs_compat_user_ino64(u64 fileid) |
| 90 | { |
| 91 | int ino; |
| 92 | |
| 93 | if (enable_ino64) |
| 94 | return fileid; |
| 95 | ino = fileid; |
| 96 | if (sizeof(ino) < sizeof(fileid)) |
| 97 | ino ^= fileid >> (sizeof(fileid)-sizeof(ino)) * 8; |
| 98 | return ino; |
| 99 | } |
| 100 | |
Al Viro | b57922d | 2010-06-07 14:34:48 -0400 | [diff] [blame] | 101 | static void nfs_clear_inode(struct inode *inode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 102 | { |
Trond Myklebust | da6d503 | 2006-06-01 17:26:35 -0400 | [diff] [blame] | 103 | /* |
| 104 | * The following should never happen... |
| 105 | */ |
| 106 | BUG_ON(nfs_have_writebacks(inode)); |
Trond Myklebust | 1c3c07e | 2006-07-25 11:28:18 -0400 | [diff] [blame] | 107 | BUG_ON(!list_empty(&NFS_I(inode)->open_files)); |
Trond Myklebust | ada70d9 | 2005-06-22 17:16:22 +0000 | [diff] [blame] | 108 | nfs_zap_acl_cache(inode); |
Trond Myklebust | 1c3c07e | 2006-07-25 11:28:18 -0400 | [diff] [blame] | 109 | nfs_access_zap_cache(inode); |
David Howells | ef79c09 | 2009-04-03 16:42:43 +0100 | [diff] [blame] | 110 | nfs_fscache_release_inode_cookie(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 111 | } |
| 112 | |
Al Viro | b57922d | 2010-06-07 14:34:48 -0400 | [diff] [blame] | 113 | void nfs_evict_inode(struct inode *inode) |
| 114 | { |
| 115 | truncate_inode_pages(&inode->i_data, 0); |
| 116 | end_writeback(inode); |
| 117 | nfs_clear_inode(inode); |
| 118 | } |
| 119 | |
Trond Myklebust | 29884df | 2005-12-13 16:13:54 -0500 | [diff] [blame] | 120 | /** |
| 121 | * nfs_sync_mapping - helper to flush all mmapped dirty data to disk |
| 122 | */ |
| 123 | int nfs_sync_mapping(struct address_space *mapping) |
| 124 | { |
Trond Myklebust | 5cf9521 | 2010-02-19 17:03:29 -0800 | [diff] [blame] | 125 | int ret = 0; |
Trond Myklebust | 29884df | 2005-12-13 16:13:54 -0500 | [diff] [blame] | 126 | |
Trond Myklebust | 5cf9521 | 2010-02-19 17:03:29 -0800 | [diff] [blame] | 127 | if (mapping->nrpages != 0) { |
| 128 | unmap_mapping_range(mapping, 0, 0, 0); |
| 129 | ret = nfs_wb_all(mapping->host); |
| 130 | } |
Trond Myklebust | 29884df | 2005-12-13 16:13:54 -0500 | [diff] [blame] | 131 | return ret; |
| 132 | } |
| 133 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 134 | /* |
| 135 | * Invalidate the local caches |
| 136 | */ |
Trond Myklebust | b37b03b | 2005-11-25 17:10:06 -0500 | [diff] [blame] | 137 | static void nfs_zap_caches_locked(struct inode *inode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 138 | { |
| 139 | struct nfs_inode *nfsi = NFS_I(inode); |
| 140 | int mode = inode->i_mode; |
| 141 | |
Chuck Lever | 91d5b47 | 2006-03-20 13:44:14 -0500 | [diff] [blame] | 142 | nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE); |
| 143 | |
Trond Myklebust | c7c2097 | 2007-09-28 19:22:40 -0400 | [diff] [blame] | 144 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); |
| 145 | nfsi->attrtimeo_timestamp = jiffies; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 146 | |
| 147 | memset(NFS_COOKIEVERF(inode), 0, sizeof(NFS_COOKIEVERF(inode))); |
| 148 | if (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode)) |
Chuck Lever | 5529680 | 2005-08-18 11:24:09 -0700 | [diff] [blame] | 149 | 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] | 150 | else |
Chuck Lever | 5529680 | 2005-08-18 11:24:09 -0700 | [diff] [blame] | 151 | 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] | 152 | } |
Chuck Lever | dc59250 | 2005-08-18 11:24:12 -0700 | [diff] [blame] | 153 | |
Trond Myklebust | b37b03b | 2005-11-25 17:10:06 -0500 | [diff] [blame] | 154 | void nfs_zap_caches(struct inode *inode) |
| 155 | { |
| 156 | spin_lock(&inode->i_lock); |
| 157 | nfs_zap_caches_locked(inode); |
Chuck Lever | dc59250 | 2005-08-18 11:24:12 -0700 | [diff] [blame] | 158 | spin_unlock(&inode->i_lock); |
Trond Myklebust | ada70d9 | 2005-06-22 17:16:22 +0000 | [diff] [blame] | 159 | } |
| 160 | |
Trond Myklebust | cd9ae2b | 2006-10-19 23:28:40 -0700 | [diff] [blame] | 161 | void nfs_zap_mapping(struct inode *inode, struct address_space *mapping) |
| 162 | { |
| 163 | if (mapping->nrpages != 0) { |
| 164 | spin_lock(&inode->i_lock); |
| 165 | NFS_I(inode)->cache_validity |= NFS_INO_INVALID_DATA; |
| 166 | spin_unlock(&inode->i_lock); |
| 167 | } |
| 168 | } |
| 169 | |
Trond Myklebust | f41f741 | 2008-06-11 17:39:04 -0400 | [diff] [blame] | 170 | void nfs_zap_acl_cache(struct inode *inode) |
Trond Myklebust | ada70d9 | 2005-06-22 17:16:22 +0000 | [diff] [blame] | 171 | { |
| 172 | void (*clear_acl_cache)(struct inode *); |
| 173 | |
| 174 | clear_acl_cache = NFS_PROTO(inode)->clear_acl_cache; |
| 175 | if (clear_acl_cache != NULL) |
| 176 | clear_acl_cache(inode); |
Chuck Lever | dc59250 | 2005-08-18 11:24:12 -0700 | [diff] [blame] | 177 | spin_lock(&inode->i_lock); |
Chuck Lever | 5529680 | 2005-08-18 11:24:09 -0700 | [diff] [blame] | 178 | NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_ACL; |
Chuck Lever | dc59250 | 2005-08-18 11:24:12 -0700 | [diff] [blame] | 179 | spin_unlock(&inode->i_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 180 | } |
| 181 | |
Trond Myklebust | c481299 | 2007-09-28 17:11:45 -0400 | [diff] [blame] | 182 | void nfs_invalidate_atime(struct inode *inode) |
| 183 | { |
| 184 | spin_lock(&inode->i_lock); |
| 185 | NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATIME; |
| 186 | spin_unlock(&inode->i_lock); |
| 187 | } |
| 188 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 189 | /* |
Trond Myklebust | b37b03b | 2005-11-25 17:10:06 -0500 | [diff] [blame] | 190 | * Invalidate, but do not unhash, the inode. |
| 191 | * NB: must be called with inode->i_lock held! |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 192 | */ |
Trond Myklebust | b37b03b | 2005-11-25 17:10:06 -0500 | [diff] [blame] | 193 | static void nfs_invalidate_inode(struct inode *inode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 194 | { |
Benny Halevy | 3a10c30 | 2008-01-23 08:58:59 +0200 | [diff] [blame] | 195 | set_bit(NFS_INO_STALE, &NFS_I(inode)->flags); |
Trond Myklebust | b37b03b | 2005-11-25 17:10:06 -0500 | [diff] [blame] | 196 | nfs_zap_caches_locked(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 197 | } |
| 198 | |
| 199 | struct nfs_find_desc { |
| 200 | struct nfs_fh *fh; |
| 201 | struct nfs_fattr *fattr; |
| 202 | }; |
| 203 | |
| 204 | /* |
| 205 | * In NFSv3 we can have 64bit inode numbers. In order to support |
| 206 | * this, and re-exported directories (also seen in NFSv2) |
| 207 | * we are forced to allow 2 different inodes to have the same |
| 208 | * i_ino. |
| 209 | */ |
| 210 | static int |
| 211 | nfs_find_actor(struct inode *inode, void *opaque) |
| 212 | { |
| 213 | struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque; |
| 214 | struct nfs_fh *fh = desc->fh; |
| 215 | struct nfs_fattr *fattr = desc->fattr; |
| 216 | |
| 217 | if (NFS_FILEID(inode) != fattr->fileid) |
| 218 | return 0; |
| 219 | if (nfs_compare_fh(NFS_FH(inode), fh)) |
| 220 | return 0; |
| 221 | if (is_bad_inode(inode) || NFS_STALE(inode)) |
| 222 | return 0; |
| 223 | return 1; |
| 224 | } |
| 225 | |
| 226 | static int |
| 227 | nfs_init_locked(struct inode *inode, void *opaque) |
| 228 | { |
| 229 | struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque; |
| 230 | struct nfs_fattr *fattr = desc->fattr; |
| 231 | |
Benny Halevy | 99fadcd | 2008-01-23 08:59:08 +0200 | [diff] [blame] | 232 | set_nfs_fileid(inode, fattr->fileid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 233 | nfs_copy_fh(NFS_FH(inode), desc->fh); |
| 234 | return 0; |
| 235 | } |
| 236 | |
| 237 | /* Don't use READDIRPLUS on directories that we believe are too large */ |
| 238 | #define NFS_LIMIT_READDIRPLUS (8*PAGE_SIZE) |
| 239 | |
| 240 | /* |
| 241 | * This is our front-end to iget that looks up inodes by file handle |
| 242 | * instead of inode number. |
| 243 | */ |
| 244 | struct inode * |
| 245 | nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr) |
| 246 | { |
| 247 | struct nfs_find_desc desc = { |
| 248 | .fh = fh, |
| 249 | .fattr = fattr |
| 250 | }; |
Trond Myklebust | 03f28e3 | 2006-03-20 13:44:48 -0500 | [diff] [blame] | 251 | struct inode *inode = ERR_PTR(-ENOENT); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 252 | unsigned long hash; |
| 253 | |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 254 | if ((fattr->valid & NFS_ATTR_FATTR_FILEID) == 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 255 | goto out_no_inode; |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 256 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) == 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 257 | goto out_no_inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 258 | |
| 259 | hash = nfs_fattr_to_ino_t(fattr); |
| 260 | |
Trond Myklebust | 03f28e3 | 2006-03-20 13:44:48 -0500 | [diff] [blame] | 261 | inode = iget5_locked(sb, hash, nfs_find_actor, nfs_init_locked, &desc); |
| 262 | if (inode == NULL) { |
| 263 | inode = ERR_PTR(-ENOMEM); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 264 | goto out_no_inode; |
Trond Myklebust | 03f28e3 | 2006-03-20 13:44:48 -0500 | [diff] [blame] | 265 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 266 | |
| 267 | if (inode->i_state & I_NEW) { |
| 268 | struct nfs_inode *nfsi = NFS_I(inode); |
Trond Myklebust | b0c4fdd | 2007-02-05 14:44:22 -0800 | [diff] [blame] | 269 | unsigned long now = jiffies; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 270 | |
| 271 | /* We set i_ino for the few things that still rely on it, |
| 272 | * such as stat(2) */ |
| 273 | inode->i_ino = hash; |
| 274 | |
| 275 | /* We can't support update_atime(), since the server will reset it */ |
| 276 | inode->i_flags |= S_NOATIME|S_NOCMTIME; |
| 277 | inode->i_mode = fattr->mode; |
Trond Myklebust | 62ab460c | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 278 | if ((fattr->valid & NFS_ATTR_FATTR_MODE) == 0 |
| 279 | && nfs_server_capable(inode, NFS_CAP_MODE)) |
| 280 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR |
| 281 | | NFS_INO_INVALID_ACCESS |
| 282 | | NFS_INO_INVALID_ACL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 283 | /* Why so? Because we want revalidate for devices/FIFOs, and |
| 284 | * that's precisely what we have in nfs_file_inode_operations. |
| 285 | */ |
David Howells | 8fa5c00 | 2006-08-22 20:06:12 -0400 | [diff] [blame] | 286 | 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] | 287 | if (S_ISREG(inode->i_mode)) { |
| 288 | inode->i_fop = &nfs_file_operations; |
| 289 | inode->i_data.a_ops = &nfs_file_aops; |
| 290 | inode->i_data.backing_dev_info = &NFS_SB(sb)->backing_dev_info; |
| 291 | } else if (S_ISDIR(inode->i_mode)) { |
David Howells | 8fa5c00 | 2006-08-22 20:06:12 -0400 | [diff] [blame] | 292 | 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] | 293 | inode->i_fop = &nfs_dir_operations; |
| 294 | if (nfs_server_capable(inode, NFS_CAP_READDIRPLUS) |
| 295 | && fattr->size <= NFS_LIMIT_READDIRPLUS) |
Benny Halevy | 3a10c30 | 2008-01-23 08:58:59 +0200 | [diff] [blame] | 296 | set_bit(NFS_INO_ADVISE_RDPLUS, &NFS_I(inode)->flags); |
Trond Myklebust | 55a9759 | 2006-06-09 09:34:19 -0400 | [diff] [blame] | 297 | /* Deal with crossing mountpoints */ |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 298 | if ((fattr->valid & NFS_ATTR_FATTR_FSID) |
| 299 | && !nfs_fsid_equal(&NFS_SB(sb)->fsid, &fattr->fsid)) { |
Manoj Naik | 6b97fd3 | 2006-06-09 09:34:29 -0400 | [diff] [blame] | 300 | if (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) |
| 301 | inode->i_op = &nfs_referral_inode_operations; |
| 302 | else |
| 303 | inode->i_op = &nfs_mountpoint_inode_operations; |
Trond Myklebust | 55a9759 | 2006-06-09 09:34:19 -0400 | [diff] [blame] | 304 | inode->i_fop = NULL; |
Trond Myklebust | c37dcd33 | 2008-03-06 12:34:50 -0500 | [diff] [blame] | 305 | set_bit(NFS_INO_MOUNTPOINT, &nfsi->flags); |
Trond Myklebust | 55a9759 | 2006-06-09 09:34:19 -0400 | [diff] [blame] | 306 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 307 | } else if (S_ISLNK(inode->i_mode)) |
| 308 | inode->i_op = &nfs_symlink_inode_operations; |
| 309 | else |
| 310 | init_special_inode(inode, inode->i_mode, fattr->rdev); |
| 311 | |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 312 | memset(&inode->i_atime, 0, sizeof(inode->i_atime)); |
| 313 | memset(&inode->i_mtime, 0, sizeof(inode->i_mtime)); |
| 314 | memset(&inode->i_ctime, 0, sizeof(inode->i_ctime)); |
| 315 | nfsi->change_attr = 0; |
| 316 | inode->i_size = 0; |
| 317 | inode->i_nlink = 0; |
| 318 | inode->i_uid = -2; |
| 319 | inode->i_gid = -2; |
| 320 | inode->i_blocks = 0; |
| 321 | memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf)); |
| 322 | |
Trond Myklebust | 3380114 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 323 | nfsi->read_cache_jiffies = fattr->time_start; |
Trond Myklebust | 4704f0e | 2008-10-14 19:16:07 -0400 | [diff] [blame] | 324 | nfsi->attr_gencount = fattr->gencount; |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 325 | if (fattr->valid & NFS_ATTR_FATTR_ATIME) |
| 326 | inode->i_atime = fattr->atime; |
Trond Myklebust | 62ab460c | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 327 | else if (nfs_server_capable(inode, NFS_CAP_ATIME)) |
| 328 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 329 | if (fattr->valid & NFS_ATTR_FATTR_MTIME) |
| 330 | inode->i_mtime = fattr->mtime; |
Trond Myklebust | 62ab460c | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 331 | else if (nfs_server_capable(inode, NFS_CAP_MTIME)) |
| 332 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR |
| 333 | | NFS_INO_INVALID_DATA; |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 334 | if (fattr->valid & NFS_ATTR_FATTR_CTIME) |
| 335 | inode->i_ctime = fattr->ctime; |
Trond Myklebust | 62ab460c | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 336 | else if (nfs_server_capable(inode, NFS_CAP_CTIME)) |
| 337 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR |
| 338 | | NFS_INO_INVALID_ACCESS |
| 339 | | NFS_INO_INVALID_ACL; |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 340 | if (fattr->valid & NFS_ATTR_FATTR_CHANGE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 341 | nfsi->change_attr = fattr->change_attr; |
Trond Myklebust | 62ab460c | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 342 | else if (nfs_server_capable(inode, NFS_CAP_CHANGE_ATTR)) |
| 343 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR |
| 344 | | NFS_INO_INVALID_DATA; |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 345 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) |
| 346 | inode->i_size = nfs_size_to_loff_t(fattr->size); |
Trond Myklebust | 62ab460c | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 347 | else |
| 348 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR |
| 349 | | NFS_INO_INVALID_DATA |
| 350 | | NFS_INO_REVAL_PAGECACHE; |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 351 | if (fattr->valid & NFS_ATTR_FATTR_NLINK) |
| 352 | inode->i_nlink = fattr->nlink; |
Trond Myklebust | 62ab460c | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 353 | else if (nfs_server_capable(inode, NFS_CAP_NLINK)) |
| 354 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 355 | if (fattr->valid & NFS_ATTR_FATTR_OWNER) |
| 356 | inode->i_uid = fattr->uid; |
Trond Myklebust | 62ab460c | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 357 | else if (nfs_server_capable(inode, NFS_CAP_OWNER)) |
| 358 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR |
| 359 | | NFS_INO_INVALID_ACCESS |
| 360 | | NFS_INO_INVALID_ACL; |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 361 | if (fattr->valid & NFS_ATTR_FATTR_GROUP) |
| 362 | inode->i_gid = fattr->gid; |
Trond Myklebust | 62ab460c | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 363 | else if (nfs_server_capable(inode, NFS_CAP_OWNER_GROUP)) |
| 364 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR |
| 365 | | NFS_INO_INVALID_ACCESS |
| 366 | | NFS_INO_INVALID_ACL; |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 367 | if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED) |
| 368 | inode->i_blocks = fattr->du.nfs2.blocks; |
| 369 | if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 370 | /* |
| 371 | * report the blocks in 512byte units |
| 372 | */ |
| 373 | inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 374 | } |
| 375 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); |
Trond Myklebust | b0c4fdd | 2007-02-05 14:44:22 -0800 | [diff] [blame] | 376 | nfsi->attrtimeo_timestamp = now; |
Trond Myklebust | 1c3c07e | 2006-07-25 11:28:18 -0400 | [diff] [blame] | 377 | nfsi->access_cache = RB_ROOT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 378 | |
David Howells | ef79c09 | 2009-04-03 16:42:43 +0100 | [diff] [blame] | 379 | nfs_fscache_init_inode_cookie(inode); |
| 380 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 381 | unlock_new_inode(inode); |
| 382 | } else |
| 383 | nfs_refresh_inode(inode, fattr); |
| 384 | dprintk("NFS: nfs_fhget(%s/%Ld ct=%d)\n", |
| 385 | inode->i_sb->s_id, |
| 386 | (long long)NFS_FILEID(inode), |
| 387 | atomic_read(&inode->i_count)); |
| 388 | |
| 389 | out: |
| 390 | return inode; |
| 391 | |
| 392 | out_no_inode: |
Trond Myklebust | 03f28e3 | 2006-03-20 13:44:48 -0500 | [diff] [blame] | 393 | dprintk("nfs_fhget: iget failed with error %ld\n", PTR_ERR(inode)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 394 | goto out; |
| 395 | } |
| 396 | |
Trond Myklebust | 659bfcd | 2008-06-10 19:39:41 -0400 | [diff] [blame] | 397 | #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] | 398 | |
| 399 | int |
| 400 | nfs_setattr(struct dentry *dentry, struct iattr *attr) |
| 401 | { |
| 402 | struct inode *inode = dentry->d_inode; |
Trond Myklebust | 987f8df | 2010-04-16 16:22:52 -0400 | [diff] [blame] | 403 | struct nfs_fattr *fattr; |
| 404 | int error = -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 405 | |
Chuck Lever | 91d5b47 | 2006-03-20 13:44:14 -0500 | [diff] [blame] | 406 | nfs_inc_stats(inode, NFSIOS_VFSSETATTR); |
| 407 | |
Jeff Layton | 188b95d | 2007-10-18 03:05:21 -0700 | [diff] [blame] | 408 | /* skip mode change if it's just for clearing setuid/setgid */ |
| 409 | if (attr->ia_valid & (ATTR_KILL_SUID | ATTR_KILL_SGID)) |
| 410 | attr->ia_valid &= ~ATTR_MODE; |
| 411 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 412 | if (attr->ia_valid & ATTR_SIZE) { |
| 413 | if (!S_ISREG(inode->i_mode) || attr->ia_size == i_size_read(inode)) |
| 414 | attr->ia_valid &= ~ATTR_SIZE; |
| 415 | } |
| 416 | |
| 417 | /* Optimization: if the end result is no change, don't RPC */ |
| 418 | attr->ia_valid &= NFS_VALID_ATTRS; |
Trond Myklebust | 659bfcd | 2008-06-10 19:39:41 -0400 | [diff] [blame] | 419 | if ((attr->ia_valid & ~ATTR_FILE) == 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 420 | return 0; |
| 421 | |
Trond Myklebust | 755c1e2 | 2006-03-20 13:44:06 -0500 | [diff] [blame] | 422 | /* Write all dirty data */ |
Trond Myklebust | 1b924e5 | 2010-07-31 14:29:06 -0400 | [diff] [blame] | 423 | if (S_ISREG(inode->i_mode)) |
Trond Myklebust | e1552e1 | 2007-04-14 19:07:28 -0400 | [diff] [blame] | 424 | nfs_wb_all(inode); |
Trond Myklebust | 987f8df | 2010-04-16 16:22:52 -0400 | [diff] [blame] | 425 | |
| 426 | fattr = nfs_alloc_fattr(); |
| 427 | if (fattr == NULL) |
| 428 | goto out; |
Trond Myklebust | 642ac54 | 2005-10-18 14:20:19 -0700 | [diff] [blame] | 429 | /* |
| 430 | * Return any delegations if we're going to change ACLs |
| 431 | */ |
| 432 | if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) |
| 433 | nfs_inode_return_delegation(inode); |
Trond Myklebust | 987f8df | 2010-04-16 16:22:52 -0400 | [diff] [blame] | 434 | error = NFS_PROTO(inode)->setattr(dentry, fattr, attr); |
Trond Myklebust | 65e4308 | 2005-08-16 11:49:44 -0400 | [diff] [blame] | 435 | if (error == 0) |
Trond Myklebust | 987f8df | 2010-04-16 16:22:52 -0400 | [diff] [blame] | 436 | nfs_refresh_inode(inode, fattr); |
| 437 | nfs_free_fattr(fattr); |
| 438 | out: |
Trond Myklebust | 65e4308 | 2005-08-16 11:49:44 -0400 | [diff] [blame] | 439 | return error; |
| 440 | } |
| 441 | |
| 442 | /** |
Trond Myklebust | a3d0145 | 2008-06-11 12:21:19 -0400 | [diff] [blame] | 443 | * nfs_vmtruncate - unmap mappings "freed" by truncate() syscall |
| 444 | * @inode: inode of the file used |
| 445 | * @offset: file offset to start truncating |
| 446 | * |
| 447 | * This is a copy of the common vmtruncate, but with the locking |
| 448 | * corrected to take into account the fact that NFS requires |
| 449 | * inode->i_size to be updated under the inode->i_lock. |
| 450 | */ |
| 451 | static int nfs_vmtruncate(struct inode * inode, loff_t offset) |
| 452 | { |
npiggin@suse.de | c08d3b0 | 2009-08-21 02:35:06 +1000 | [diff] [blame] | 453 | loff_t oldsize; |
| 454 | int err; |
Trond Myklebust | a3d0145 | 2008-06-11 12:21:19 -0400 | [diff] [blame] | 455 | |
npiggin@suse.de | c08d3b0 | 2009-08-21 02:35:06 +1000 | [diff] [blame] | 456 | err = inode_newsize_ok(inode, offset); |
| 457 | if (err) |
| 458 | goto out; |
Trond Myklebust | a3d0145 | 2008-06-11 12:21:19 -0400 | [diff] [blame] | 459 | |
npiggin@suse.de | c08d3b0 | 2009-08-21 02:35:06 +1000 | [diff] [blame] | 460 | spin_lock(&inode->i_lock); |
| 461 | oldsize = inode->i_size; |
| 462 | i_size_write(inode, offset); |
| 463 | spin_unlock(&inode->i_lock); |
Trond Myklebust | a3d0145 | 2008-06-11 12:21:19 -0400 | [diff] [blame] | 464 | |
npiggin@suse.de | c08d3b0 | 2009-08-21 02:35:06 +1000 | [diff] [blame] | 465 | truncate_pagecache(inode, oldsize, offset); |
| 466 | out: |
| 467 | return err; |
Trond Myklebust | a3d0145 | 2008-06-11 12:21:19 -0400 | [diff] [blame] | 468 | } |
| 469 | |
| 470 | /** |
Trond Myklebust | 65e4308 | 2005-08-16 11:49:44 -0400 | [diff] [blame] | 471 | * nfs_setattr_update_inode - Update inode metadata after a setattr call. |
| 472 | * @inode: pointer to struct inode |
| 473 | * @attr: pointer to struct iattr |
| 474 | * |
| 475 | * Note: we do this in the *proc.c in order to ensure that |
| 476 | * it works for things like exclusive creates too. |
| 477 | */ |
| 478 | void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr) |
| 479 | { |
| 480 | if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) { |
Trond Myklebust | 2f28ea6 | 2008-10-05 14:26:11 -0400 | [diff] [blame] | 481 | spin_lock(&inode->i_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 482 | if ((attr->ia_valid & ATTR_MODE) != 0) { |
Trond Myklebust | 65e4308 | 2005-08-16 11:49:44 -0400 | [diff] [blame] | 483 | int mode = attr->ia_mode & S_IALLUGO; |
| 484 | mode |= inode->i_mode & ~S_IALLUGO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 485 | inode->i_mode = mode; |
| 486 | } |
| 487 | if ((attr->ia_valid & ATTR_UID) != 0) |
| 488 | inode->i_uid = attr->ia_uid; |
| 489 | if ((attr->ia_valid & ATTR_GID) != 0) |
| 490 | inode->i_gid = attr->ia_gid; |
Chuck Lever | 5529680 | 2005-08-18 11:24:09 -0700 | [diff] [blame] | 491 | 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] | 492 | spin_unlock(&inode->i_lock); |
Trond Myklebust | 65e4308 | 2005-08-16 11:49:44 -0400 | [diff] [blame] | 493 | } |
| 494 | if ((attr->ia_valid & ATTR_SIZE) != 0) { |
Chuck Lever | 91d5b47 | 2006-03-20 13:44:14 -0500 | [diff] [blame] | 495 | nfs_inc_stats(inode, NFSIOS_SETATTRTRUNC); |
Trond Myklebust | a3d0145 | 2008-06-11 12:21:19 -0400 | [diff] [blame] | 496 | nfs_vmtruncate(inode, attr->ia_size); |
Trond Myklebust | 65e4308 | 2005-08-16 11:49:44 -0400 | [diff] [blame] | 497 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 498 | } |
| 499 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 500 | int nfs_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat) |
| 501 | { |
| 502 | struct inode *inode = dentry->d_inode; |
Chuck Lever | 5529680 | 2005-08-18 11:24:09 -0700 | [diff] [blame] | 503 | int need_atime = NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATIME; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 504 | int err; |
| 505 | |
Trond Myklebust | acdc53b | 2010-02-19 17:03:26 -0800 | [diff] [blame] | 506 | /* Flush out writes to the server in order to update c/mtime. */ |
Chuck Lever | 28c494c | 2007-10-26 13:32:13 -0400 | [diff] [blame] | 507 | if (S_ISREG(inode->i_mode)) { |
Trond Myklebust | acdc53b | 2010-02-19 17:03:26 -0800 | [diff] [blame] | 508 | err = filemap_write_and_wait(inode->i_mapping); |
| 509 | if (err) |
| 510 | goto out; |
Chuck Lever | 28c494c | 2007-10-26 13:32:13 -0400 | [diff] [blame] | 511 | } |
Christoph Hellwig | fc33a7b | 2006-01-09 20:52:17 -0800 | [diff] [blame] | 512 | |
| 513 | /* |
| 514 | * We may force a getattr if the user cares about atime. |
| 515 | * |
| 516 | * Note that we only have to check the vfsmount flags here: |
| 517 | * - NFS always sets S_NOATIME by so checking it would give a |
| 518 | * bogus result |
| 519 | * - NFS never sets MS_NOATIME or MS_NODIRATIME so there is |
| 520 | * no point in checking those. |
| 521 | */ |
| 522 | if ((mnt->mnt_flags & MNT_NOATIME) || |
| 523 | ((mnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 524 | need_atime = 0; |
Christoph Hellwig | fc33a7b | 2006-01-09 20:52:17 -0800 | [diff] [blame] | 525 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 526 | if (need_atime) |
| 527 | err = __nfs_revalidate_inode(NFS_SERVER(inode), inode); |
| 528 | else |
| 529 | err = nfs_revalidate_inode(NFS_SERVER(inode), inode); |
Peter Staubach | 4e769b9 | 2007-08-03 15:07:10 -0400 | [diff] [blame] | 530 | if (!err) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 531 | generic_fillattr(inode, stat); |
Trond Myklebust | f43bf0b | 2007-10-09 12:01:04 -0400 | [diff] [blame] | 532 | stat->ino = nfs_compat_user_ino64(NFS_FILEID(inode)); |
Peter Staubach | 4e769b9 | 2007-08-03 15:07:10 -0400 | [diff] [blame] | 533 | } |
Trond Myklebust | acdc53b | 2010-02-19 17:03:26 -0800 | [diff] [blame] | 534 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 535 | return err; |
| 536 | } |
| 537 | |
Trond Myklebust | f11ac8d | 2010-06-25 16:35:53 -0400 | [diff] [blame] | 538 | static void nfs_init_lock_context(struct nfs_lock_context *l_ctx) |
| 539 | { |
| 540 | atomic_set(&l_ctx->count, 1); |
| 541 | l_ctx->lockowner = current->files; |
| 542 | l_ctx->pid = current->tgid; |
| 543 | INIT_LIST_HEAD(&l_ctx->list); |
| 544 | } |
| 545 | |
| 546 | static struct nfs_lock_context *__nfs_find_lock_context(struct nfs_open_context *ctx) |
| 547 | { |
| 548 | struct nfs_lock_context *pos; |
| 549 | |
| 550 | list_for_each_entry(pos, &ctx->lock_context.list, list) { |
| 551 | if (pos->lockowner != current->files) |
| 552 | continue; |
| 553 | if (pos->pid != current->tgid) |
| 554 | continue; |
| 555 | atomic_inc(&pos->count); |
| 556 | return pos; |
| 557 | } |
| 558 | return NULL; |
| 559 | } |
| 560 | |
| 561 | struct nfs_lock_context *nfs_get_lock_context(struct nfs_open_context *ctx) |
| 562 | { |
| 563 | struct nfs_lock_context *res, *new = NULL; |
| 564 | struct inode *inode = ctx->path.dentry->d_inode; |
| 565 | |
| 566 | spin_lock(&inode->i_lock); |
| 567 | res = __nfs_find_lock_context(ctx); |
| 568 | if (res == NULL) { |
| 569 | spin_unlock(&inode->i_lock); |
| 570 | new = kmalloc(sizeof(*new), GFP_KERNEL); |
| 571 | if (new == NULL) |
| 572 | return NULL; |
| 573 | nfs_init_lock_context(new); |
| 574 | spin_lock(&inode->i_lock); |
| 575 | res = __nfs_find_lock_context(ctx); |
| 576 | if (res == NULL) { |
| 577 | list_add_tail(&new->list, &ctx->lock_context.list); |
| 578 | new->open_context = ctx; |
| 579 | res = new; |
| 580 | new = NULL; |
| 581 | } |
| 582 | } |
| 583 | spin_unlock(&inode->i_lock); |
| 584 | kfree(new); |
| 585 | return res; |
| 586 | } |
| 587 | |
| 588 | void nfs_put_lock_context(struct nfs_lock_context *l_ctx) |
| 589 | { |
| 590 | struct nfs_open_context *ctx = l_ctx->open_context; |
| 591 | struct inode *inode = ctx->path.dentry->d_inode; |
| 592 | |
| 593 | if (!atomic_dec_and_lock(&l_ctx->count, &inode->i_lock)) |
| 594 | return; |
| 595 | list_del(&l_ctx->list); |
| 596 | spin_unlock(&inode->i_lock); |
| 597 | kfree(l_ctx); |
| 598 | } |
| 599 | |
Trond Myklebust | 7fe5c39 | 2009-03-19 15:35:50 -0400 | [diff] [blame] | 600 | /** |
| 601 | * nfs_close_context - Common close_context() routine NFSv2/v3 |
| 602 | * @ctx: pointer to context |
| 603 | * @is_sync: is this a synchronous close |
| 604 | * |
| 605 | * always ensure that the attributes are up to date if we're mounted |
| 606 | * with close-to-open semantics |
| 607 | */ |
| 608 | void nfs_close_context(struct nfs_open_context *ctx, int is_sync) |
| 609 | { |
| 610 | struct inode *inode; |
| 611 | struct nfs_server *server; |
| 612 | |
| 613 | if (!(ctx->mode & FMODE_WRITE)) |
| 614 | return; |
| 615 | if (!is_sync) |
| 616 | return; |
| 617 | inode = ctx->path.dentry->d_inode; |
| 618 | if (!list_empty(&NFS_I(inode)->open_files)) |
| 619 | return; |
| 620 | server = NFS_SERVER(inode); |
| 621 | if (server->flags & NFS_MOUNT_NOCTO) |
| 622 | return; |
| 623 | nfs_revalidate_inode(server, inode); |
| 624 | } |
| 625 | |
Trond Myklebust | cd9a1c0 | 2010-09-17 10:56:50 -0400 | [diff] [blame] | 626 | struct nfs_open_context *alloc_nfs_open_context(struct path *path, struct rpc_cred *cred, fmode_t f_mode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 627 | { |
| 628 | struct nfs_open_context *ctx; |
| 629 | |
Panagiotis Issaris | f52720c | 2006-09-27 01:49:39 -0700 | [diff] [blame] | 630 | ctx = kmalloc(sizeof(*ctx), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 631 | if (ctx != NULL) { |
Al Viro | 6eae797 | 2010-01-30 13:44:07 -0500 | [diff] [blame] | 632 | ctx->path = *path; |
| 633 | path_get(&ctx->path); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 634 | ctx->cred = get_rpccred(cred); |
| 635 | ctx->state = NULL; |
Trond Myklebust | cd9a1c0 | 2010-09-17 10:56:50 -0400 | [diff] [blame] | 636 | ctx->mode = f_mode; |
Jeff Layton | 66d3aac | 2008-03-31 15:01:58 -0400 | [diff] [blame] | 637 | ctx->flags = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 638 | ctx->error = 0; |
Olivier Galibert | 00a9264 | 2005-06-22 17:16:29 +0000 | [diff] [blame] | 639 | ctx->dir_cookie = 0; |
Trond Myklebust | f11ac8d | 2010-06-25 16:35:53 -0400 | [diff] [blame] | 640 | nfs_init_lock_context(&ctx->lock_context); |
| 641 | ctx->lock_context.open_context = ctx; |
Trond Myklebust | 5c78f58 | 2010-09-27 15:51:20 -0400 | [diff] [blame] | 642 | INIT_LIST_HEAD(&ctx->list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 643 | } |
| 644 | return ctx; |
| 645 | } |
| 646 | |
| 647 | struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx) |
| 648 | { |
| 649 | if (ctx != NULL) |
Trond Myklebust | f11ac8d | 2010-06-25 16:35:53 -0400 | [diff] [blame] | 650 | atomic_inc(&ctx->lock_context.count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 651 | return ctx; |
| 652 | } |
| 653 | |
Trond Myklebust | 7fe5c39 | 2009-03-19 15:35:50 -0400 | [diff] [blame] | 654 | 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] | 655 | { |
Trond Myklebust | 7fe5c39 | 2009-03-19 15:35:50 -0400 | [diff] [blame] | 656 | struct inode *inode = ctx->path.dentry->d_inode; |
Trond Myklebust | 3bec63d | 2007-06-17 16:02:44 -0400 | [diff] [blame] | 657 | |
Trond Myklebust | 5c78f58 | 2010-09-27 15:51:20 -0400 | [diff] [blame] | 658 | if (!list_empty(&ctx->list)) { |
Benny Halevy | ef84303 | 2010-09-23 12:22:09 -0400 | [diff] [blame] | 659 | if (!atomic_dec_and_lock(&ctx->lock_context.count, &inode->i_lock)) |
| 660 | return; |
| 661 | list_del(&ctx->list); |
| 662 | spin_unlock(&inode->i_lock); |
Benny Halevy | ef84303 | 2010-09-23 12:22:09 -0400 | [diff] [blame] | 663 | } else if (!atomic_dec_and_test(&ctx->lock_context.count)) |
Trond Myklebust | 5e11934 | 2007-07-26 12:06:17 -0400 | [diff] [blame] | 664 | return; |
Trond Myklebust | 5c78f58 | 2010-09-27 15:51:20 -0400 | [diff] [blame] | 665 | if (inode != NULL) |
| 666 | NFS_PROTO(inode)->close_context(ctx, is_sync); |
Trond Myklebust | 3bec63d | 2007-06-17 16:02:44 -0400 | [diff] [blame] | 667 | if (ctx->cred != NULL) |
| 668 | put_rpccred(ctx->cred); |
Jan Blunck | 31f31db1 | 2008-05-02 13:42:45 -0700 | [diff] [blame] | 669 | path_put(&ctx->path); |
Trond Myklebust | 3bec63d | 2007-06-17 16:02:44 -0400 | [diff] [blame] | 670 | kfree(ctx); |
| 671 | } |
| 672 | |
Trond Myklebust | a49c3c7 | 2007-10-18 18:03:27 -0400 | [diff] [blame] | 673 | void put_nfs_open_context(struct nfs_open_context *ctx) |
| 674 | { |
| 675 | __put_nfs_open_context(ctx, 0); |
| 676 | } |
| 677 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 678 | /* |
| 679 | * Ensure that mmap has a recent RPC credential for use when writing out |
| 680 | * shared pages |
| 681 | */ |
Trond Myklebust | cd9a1c0 | 2010-09-17 10:56:50 -0400 | [diff] [blame] | 682 | 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] | 683 | { |
Josef "Jeff" Sipek | 01cce93 | 2006-12-08 02:36:40 -0800 | [diff] [blame] | 684 | struct inode *inode = filp->f_path.dentry->d_inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 685 | struct nfs_inode *nfsi = NFS_I(inode); |
| 686 | |
| 687 | filp->private_data = get_nfs_open_context(ctx); |
| 688 | spin_lock(&inode->i_lock); |
| 689 | list_add(&ctx->list, &nfsi->open_files); |
| 690 | spin_unlock(&inode->i_lock); |
| 691 | } |
| 692 | |
Trond Myklebust | d530838 | 2005-11-04 15:33:38 -0500 | [diff] [blame] | 693 | /* |
| 694 | * Given an inode, search for an open context with the desired characteristics |
| 695 | */ |
Trond Myklebust | dc0b027 | 2008-12-23 15:21:56 -0500 | [diff] [blame] | 696 | 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] | 697 | { |
| 698 | struct nfs_inode *nfsi = NFS_I(inode); |
| 699 | struct nfs_open_context *pos, *ctx = NULL; |
| 700 | |
| 701 | spin_lock(&inode->i_lock); |
| 702 | list_for_each_entry(pos, &nfsi->open_files, list) { |
Trond Myklebust | d530838 | 2005-11-04 15:33:38 -0500 | [diff] [blame] | 703 | if (cred != NULL && pos->cred != cred) |
| 704 | continue; |
Trond Myklebust | 1544fa0 | 2010-03-25 13:54:49 -0400 | [diff] [blame] | 705 | if ((pos->mode & (FMODE_READ|FMODE_WRITE)) != mode) |
| 706 | continue; |
| 707 | ctx = get_nfs_open_context(pos); |
| 708 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 709 | } |
| 710 | spin_unlock(&inode->i_lock); |
| 711 | return ctx; |
| 712 | } |
| 713 | |
Trond Myklebust | b92dccf | 2006-03-20 13:44:03 -0500 | [diff] [blame] | 714 | static void nfs_file_clear_open_context(struct file *filp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 715 | { |
Josef "Jeff" Sipek | 01cce93 | 2006-12-08 02:36:40 -0800 | [diff] [blame] | 716 | struct inode *inode = filp->f_path.dentry->d_inode; |
Trond Myklebust | cd3758e | 2007-08-10 17:44:32 -0400 | [diff] [blame] | 717 | struct nfs_open_context *ctx = nfs_file_open_context(filp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 718 | |
| 719 | if (ctx) { |
| 720 | filp->private_data = NULL; |
| 721 | spin_lock(&inode->i_lock); |
| 722 | list_move_tail(&ctx->list, &NFS_I(inode)->open_files); |
| 723 | spin_unlock(&inode->i_lock); |
Chuck Lever | f895c53 | 2010-02-01 14:17:50 -0500 | [diff] [blame] | 724 | __put_nfs_open_context(ctx, filp->f_flags & O_DIRECT ? 0 : 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 725 | } |
| 726 | } |
| 727 | |
| 728 | /* |
| 729 | * These allocate and release file read/write context information. |
| 730 | */ |
| 731 | int nfs_open(struct inode *inode, struct file *filp) |
| 732 | { |
| 733 | struct nfs_open_context *ctx; |
| 734 | struct rpc_cred *cred; |
| 735 | |
Trond Myklebust | 98a8e32 | 2008-03-12 12:25:28 -0400 | [diff] [blame] | 736 | cred = rpc_lookup_cred(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 737 | if (IS_ERR(cred)) |
| 738 | return PTR_ERR(cred); |
Trond Myklebust | cd9a1c0 | 2010-09-17 10:56:50 -0400 | [diff] [blame] | 739 | ctx = alloc_nfs_open_context(&filp->f_path, cred, filp->f_mode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 740 | put_rpccred(cred); |
| 741 | if (ctx == NULL) |
| 742 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 743 | nfs_file_set_open_context(filp, ctx); |
| 744 | put_nfs_open_context(ctx); |
David Howells | ef79c09 | 2009-04-03 16:42:43 +0100 | [diff] [blame] | 745 | nfs_fscache_set_inode_cookie(inode, filp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 746 | return 0; |
| 747 | } |
| 748 | |
| 749 | int nfs_release(struct inode *inode, struct file *filp) |
| 750 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 751 | nfs_file_clear_open_context(filp); |
| 752 | return 0; |
| 753 | } |
| 754 | |
| 755 | /* |
| 756 | * This function is called whenever some part of NFS notices that |
| 757 | * the cached attributes have to be refreshed. |
| 758 | */ |
| 759 | int |
| 760 | __nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) |
| 761 | { |
| 762 | int status = -ESTALE; |
Trond Myklebust | a3cba2a | 2010-04-16 16:22:49 -0400 | [diff] [blame] | 763 | struct nfs_fattr *fattr = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 764 | struct nfs_inode *nfsi = NFS_I(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 765 | |
| 766 | dfprintk(PAGECACHE, "NFS: revalidating (%s/%Ld)\n", |
| 767 | inode->i_sb->s_id, (long long)NFS_FILEID(inode)); |
| 768 | |
Chuck Lever | 85233a7 | 2006-10-19 23:28:42 -0700 | [diff] [blame] | 769 | if (is_bad_inode(inode)) |
Chuck Lever | 412d582 | 2005-08-18 11:24:11 -0700 | [diff] [blame] | 770 | goto out; |
Trond Myklebust | 7fdc49c | 2007-09-28 19:11:33 -0400 | [diff] [blame] | 771 | if (NFS_STALE(inode)) |
| 772 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 773 | |
Trond Myklebust | a3cba2a | 2010-04-16 16:22:49 -0400 | [diff] [blame] | 774 | status = -ENOMEM; |
| 775 | fattr = nfs_alloc_fattr(); |
| 776 | if (fattr == NULL) |
| 777 | goto out; |
| 778 | |
Trond Myklebust | 691beb1 | 2008-10-05 14:48:22 -0400 | [diff] [blame] | 779 | nfs_inc_stats(inode, NFSIOS_INODEREVALIDATE); |
Trond Myklebust | a3cba2a | 2010-04-16 16:22:49 -0400 | [diff] [blame] | 780 | status = NFS_PROTO(inode)->getattr(server, NFS_FH(inode), fattr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 781 | if (status != 0) { |
| 782 | dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) getattr failed, error=%d\n", |
| 783 | inode->i_sb->s_id, |
| 784 | (long long)NFS_FILEID(inode), status); |
| 785 | if (status == -ESTALE) { |
| 786 | nfs_zap_caches(inode); |
| 787 | if (!S_ISDIR(inode->i_mode)) |
Benny Halevy | 3a10c30 | 2008-01-23 08:58:59 +0200 | [diff] [blame] | 788 | set_bit(NFS_INO_STALE, &NFS_I(inode)->flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 789 | } |
| 790 | goto out; |
| 791 | } |
| 792 | |
Trond Myklebust | a3cba2a | 2010-04-16 16:22:49 -0400 | [diff] [blame] | 793 | status = nfs_refresh_inode(inode, fattr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 794 | if (status) { |
| 795 | dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) refresh failed, error=%d\n", |
| 796 | inode->i_sb->s_id, |
| 797 | (long long)NFS_FILEID(inode), status); |
| 798 | goto out; |
| 799 | } |
Chuck Lever | 5529680 | 2005-08-18 11:24:09 -0700 | [diff] [blame] | 800 | |
Trond Myklebust | 24aa1fe | 2005-12-03 15:20:07 -0500 | [diff] [blame] | 801 | if (nfsi->cache_validity & NFS_INO_INVALID_ACL) |
Trond Myklebust | ada70d9 | 2005-06-22 17:16:22 +0000 | [diff] [blame] | 802 | nfs_zap_acl_cache(inode); |
Chuck Lever | 5529680 | 2005-08-18 11:24:09 -0700 | [diff] [blame] | 803 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 804 | dfprintk(PAGECACHE, "NFS: (%s/%Ld) revalidation complete\n", |
| 805 | inode->i_sb->s_id, |
| 806 | (long long)NFS_FILEID(inode)); |
| 807 | |
Chuck Lever | 412d582 | 2005-08-18 11:24:11 -0700 | [diff] [blame] | 808 | out: |
Trond Myklebust | a3cba2a | 2010-04-16 16:22:49 -0400 | [diff] [blame] | 809 | nfs_free_fattr(fattr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 810 | return status; |
| 811 | } |
| 812 | |
| 813 | int nfs_attribute_timeout(struct inode *inode) |
| 814 | { |
| 815 | struct nfs_inode *nfsi = NFS_I(inode); |
| 816 | |
Trond Myklebust | d7cf8dd | 2010-04-16 16:42:46 -0400 | [diff] [blame] | 817 | return !time_in_range_open(jiffies, nfsi->read_cache_jiffies, nfsi->read_cache_jiffies + nfsi->attrtimeo); |
| 818 | } |
| 819 | |
| 820 | static int nfs_attribute_cache_expired(struct inode *inode) |
| 821 | { |
Trond Myklebust | b4d2314 | 2010-03-10 15:21:44 -0500 | [diff] [blame] | 822 | if (nfs_have_delegated_attributes(inode)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 823 | return 0; |
Trond Myklebust | d7cf8dd | 2010-04-16 16:42:46 -0400 | [diff] [blame] | 824 | return nfs_attribute_timeout(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 825 | } |
| 826 | |
| 827 | /** |
| 828 | * nfs_revalidate_inode - Revalidate the inode attributes |
| 829 | * @server - pointer to nfs_server struct |
| 830 | * @inode - pointer to inode struct |
| 831 | * |
| 832 | * Updates inode attribute information by retrieving the data from the server. |
| 833 | */ |
| 834 | int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) |
| 835 | { |
Trond Myklebust | 44b1187 | 2006-05-25 01:40:59 -0400 | [diff] [blame] | 836 | if (!(NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATTR) |
Trond Myklebust | d7cf8dd | 2010-04-16 16:42:46 -0400 | [diff] [blame] | 837 | && !nfs_attribute_cache_expired(inode)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 838 | return NFS_STALE(inode) ? -ESTALE : 0; |
| 839 | return __nfs_revalidate_inode(server, inode); |
| 840 | } |
| 841 | |
Trond Myklebust | 1cda707 | 2010-02-19 17:03:30 -0800 | [diff] [blame] | 842 | static int nfs_invalidate_mapping(struct inode *inode, struct address_space *mapping) |
Trond Myklebust | 717d44e | 2007-01-24 11:54:55 -0800 | [diff] [blame] | 843 | { |
| 844 | struct nfs_inode *nfsi = NFS_I(inode); |
| 845 | |
| 846 | if (mapping->nrpages != 0) { |
| 847 | int ret = invalidate_inode_pages2(mapping); |
| 848 | if (ret < 0) |
| 849 | return ret; |
| 850 | } |
| 851 | spin_lock(&inode->i_lock); |
| 852 | nfsi->cache_validity &= ~NFS_INO_INVALID_DATA; |
Trond Myklebust | 2f78e43 | 2007-09-30 15:31:19 -0400 | [diff] [blame] | 853 | if (S_ISDIR(inode->i_mode)) |
Trond Myklebust | 717d44e | 2007-01-24 11:54:55 -0800 | [diff] [blame] | 854 | memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf)); |
Trond Myklebust | 717d44e | 2007-01-24 11:54:55 -0800 | [diff] [blame] | 855 | spin_unlock(&inode->i_lock); |
| 856 | nfs_inc_stats(inode, NFSIOS_DATAINVALIDATE); |
David Howells | ef79c09 | 2009-04-03 16:42:43 +0100 | [diff] [blame] | 857 | nfs_fscache_reset_inode_cookie(inode); |
Trond Myklebust | 717d44e | 2007-01-24 11:54:55 -0800 | [diff] [blame] | 858 | dfprintk(PAGECACHE, "NFS: (%s/%Ld) data cache invalidated\n", |
| 859 | inode->i_sb->s_id, (long long)NFS_FILEID(inode)); |
| 860 | return 0; |
| 861 | } |
| 862 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 863 | /** |
Trond Myklebust | 7d52e86 | 2005-06-22 17:16:30 +0000 | [diff] [blame] | 864 | * nfs_revalidate_mapping - Revalidate the pagecache |
| 865 | * @inode - pointer to host inode |
| 866 | * @mapping - pointer to mapping |
| 867 | */ |
Trond Myklebust | 44b1187 | 2006-05-25 01:40:59 -0400 | [diff] [blame] | 868 | int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping) |
Trond Myklebust | 7d52e86 | 2005-06-22 17:16:30 +0000 | [diff] [blame] | 869 | { |
| 870 | struct nfs_inode *nfsi = NFS_I(inode); |
Trond Myklebust | 44b1187 | 2006-05-25 01:40:59 -0400 | [diff] [blame] | 871 | int ret = 0; |
| 872 | |
Trond Myklebust | 44b1187 | 2006-05-25 01:40:59 -0400 | [diff] [blame] | 873 | if ((nfsi->cache_validity & NFS_INO_REVAL_PAGECACHE) |
Trond Myklebust | d7cf8dd | 2010-04-16 16:42:46 -0400 | [diff] [blame] | 874 | || nfs_attribute_cache_expired(inode) |
| 875 | || NFS_STALE(inode)) { |
Trond Myklebust | 44b1187 | 2006-05-25 01:40:59 -0400 | [diff] [blame] | 876 | ret = __nfs_revalidate_inode(NFS_SERVER(inode), inode); |
Trond Myklebust | 717d44e | 2007-01-24 11:54:55 -0800 | [diff] [blame] | 877 | if (ret < 0) |
| 878 | goto out; |
Trond Myklebust | 7d52e86 | 2005-06-22 17:16:30 +0000 | [diff] [blame] | 879 | } |
Trond Myklebust | 717d44e | 2007-01-24 11:54:55 -0800 | [diff] [blame] | 880 | if (nfsi->cache_validity & NFS_INO_INVALID_DATA) |
| 881 | ret = nfs_invalidate_mapping(inode, mapping); |
Trond Myklebust | cd9ae2b | 2006-10-19 23:28:40 -0700 | [diff] [blame] | 882 | out: |
Trond Myklebust | 44b1187 | 2006-05-25 01:40:59 -0400 | [diff] [blame] | 883 | return ret; |
Trond Myklebust | 7d52e86 | 2005-06-22 17:16:30 +0000 | [diff] [blame] | 884 | } |
| 885 | |
Trond Myklebust | a895b4a | 2006-01-03 09:55:40 +0100 | [diff] [blame] | 886 | static void nfs_wcc_update_inode(struct inode *inode, struct nfs_fattr *fattr) |
| 887 | { |
| 888 | struct nfs_inode *nfsi = NFS_I(inode); |
| 889 | |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 890 | if ((fattr->valid & NFS_ATTR_FATTR_PRECHANGE) |
| 891 | && (fattr->valid & NFS_ATTR_FATTR_CHANGE) |
| 892 | && nfsi->change_attr == fattr->pre_change_attr) { |
Trond Myklebust | 70ca885 | 2007-09-30 15:21:24 -0400 | [diff] [blame] | 893 | nfsi->change_attr = fattr->change_attr; |
| 894 | if (S_ISDIR(inode->i_mode)) |
| 895 | nfsi->cache_validity |= NFS_INO_INVALID_DATA; |
| 896 | } |
Trond Myklebust | a895b4a | 2006-01-03 09:55:40 +0100 | [diff] [blame] | 897 | /* If we have atomic WCC data, we may update some attributes */ |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 898 | if ((fattr->valid & NFS_ATTR_FATTR_PRECTIME) |
| 899 | && (fattr->valid & NFS_ATTR_FATTR_CTIME) |
| 900 | && timespec_equal(&inode->i_ctime, &fattr->pre_ctime)) |
Trond Myklebust | a895b4a | 2006-01-03 09:55:40 +0100 | [diff] [blame] | 901 | memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime)); |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 902 | |
| 903 | if ((fattr->valid & NFS_ATTR_FATTR_PREMTIME) |
| 904 | && (fattr->valid & NFS_ATTR_FATTR_MTIME) |
| 905 | && timespec_equal(&inode->i_mtime, &fattr->pre_mtime)) { |
Trond Myklebust | a895b4a | 2006-01-03 09:55:40 +0100 | [diff] [blame] | 906 | memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime)); |
Trond Myklebust | e323ea4 | 2007-09-30 17:03:25 -0400 | [diff] [blame] | 907 | if (S_ISDIR(inode->i_mode)) |
| 908 | nfsi->cache_validity |= NFS_INO_INVALID_DATA; |
Trond Myklebust | a895b4a | 2006-01-03 09:55:40 +0100 | [diff] [blame] | 909 | } |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 910 | if ((fattr->valid & NFS_ATTR_FATTR_PRESIZE) |
| 911 | && (fattr->valid & NFS_ATTR_FATTR_SIZE) |
| 912 | && i_size_read(inode) == nfs_size_to_loff_t(fattr->pre_size) |
| 913 | && nfsi->npages == 0) |
| 914 | i_size_write(inode, nfs_size_to_loff_t(fattr->size)); |
Trond Myklebust | a895b4a | 2006-01-03 09:55:40 +0100 | [diff] [blame] | 915 | } |
| 916 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 917 | /** |
Trond Myklebust | 3380114 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 918 | * nfs_check_inode_attributes - verify consistency of the inode attribute cache |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 919 | * @inode - pointer to inode |
| 920 | * @fattr - updated attributes |
| 921 | * |
| 922 | * Verifies the attribute cache. If we have just changed the attributes, |
| 923 | * so that fattr carries weak cache consistency data, then it may |
| 924 | * also update the ctime/mtime/change_attribute. |
| 925 | */ |
Trond Myklebust | 3380114 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 926 | 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] | 927 | { |
| 928 | struct nfs_inode *nfsi = NFS_I(inode); |
| 929 | loff_t cur_size, new_isize; |
Trond Myklebust | 2a3f5fd | 2007-10-08 14:26:13 -0400 | [diff] [blame] | 930 | unsigned long invalid = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 931 | |
Chuck Lever | dc59250 | 2005-08-18 11:24:12 -0700 | [diff] [blame] | 932 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 933 | /* Has the inode gone and changed behind our back? */ |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 934 | if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 935 | return -EIO; |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 936 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) |
| 937 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 938 | |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 939 | if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 && |
Trond Myklebust | f1bb0b9 | 2006-05-25 01:40:55 -0400 | [diff] [blame] | 940 | nfsi->change_attr != fattr->change_attr) |
Trond Myklebust | 2a3f5fd | 2007-10-08 14:26:13 -0400 | [diff] [blame] | 941 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 942 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 943 | /* Verify a few of the more important attributes */ |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 944 | 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] | 945 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; |
Trond Myklebust | ca62b9c | 2006-03-20 13:44:07 -0500 | [diff] [blame] | 946 | |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 947 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) { |
| 948 | cur_size = i_size_read(inode); |
| 949 | new_isize = nfs_size_to_loff_t(fattr->size); |
| 950 | if (cur_size != new_isize && nfsi->npages == 0) |
| 951 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; |
| 952 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 953 | |
| 954 | /* Have any file permissions changed? */ |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 955 | if ((fattr->valid & NFS_ATTR_FATTR_MODE) && (inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) |
| 956 | invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; |
| 957 | if ((fattr->valid & NFS_ATTR_FATTR_OWNER) && inode->i_uid != fattr->uid) |
| 958 | invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; |
| 959 | if ((fattr->valid & NFS_ATTR_FATTR_GROUP) && inode->i_gid != fattr->gid) |
Trond Myklebust | 2a3f5fd | 2007-10-08 14:26:13 -0400 | [diff] [blame] | 960 | 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] | 961 | |
| 962 | /* Has the link count changed? */ |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 963 | if ((fattr->valid & NFS_ATTR_FATTR_NLINK) && inode->i_nlink != fattr->nlink) |
Trond Myklebust | 2a3f5fd | 2007-10-08 14:26:13 -0400 | [diff] [blame] | 964 | invalid |= NFS_INO_INVALID_ATTR; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 965 | |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 966 | 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] | 967 | invalid |= NFS_INO_INVALID_ATIME; |
| 968 | |
| 969 | if (invalid != 0) |
| 970 | nfsi->cache_validity |= invalid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 971 | |
Trond Myklebust | 3380114 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 972 | nfsi->read_cache_jiffies = fattr->time_start; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 973 | return 0; |
| 974 | } |
| 975 | |
Trond Myklebust | a10ad17 | 2008-09-23 17:28:41 -0400 | [diff] [blame] | 976 | static int nfs_ctime_need_update(const struct inode *inode, const struct nfs_fattr *fattr) |
| 977 | { |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 978 | if (!(fattr->valid & NFS_ATTR_FATTR_CTIME)) |
| 979 | return 0; |
Trond Myklebust | a10ad17 | 2008-09-23 17:28:41 -0400 | [diff] [blame] | 980 | return timespec_compare(&fattr->ctime, &inode->i_ctime) > 0; |
| 981 | } |
| 982 | |
| 983 | static int nfs_size_need_update(const struct inode *inode, const struct nfs_fattr *fattr) |
| 984 | { |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 985 | if (!(fattr->valid & NFS_ATTR_FATTR_SIZE)) |
| 986 | return 0; |
Trond Myklebust | a10ad17 | 2008-09-23 17:28:41 -0400 | [diff] [blame] | 987 | return nfs_size_to_loff_t(fattr->size) > i_size_read(inode); |
| 988 | } |
| 989 | |
Trond Myklebust | ae05f26 | 2008-10-28 15:21:40 -0400 | [diff] [blame] | 990 | static atomic_long_t nfs_attr_generation_counter; |
Trond Myklebust | 4704f0e | 2008-10-14 19:16:07 -0400 | [diff] [blame] | 991 | |
| 992 | static unsigned long nfs_read_attr_generation_counter(void) |
| 993 | { |
Trond Myklebust | ae05f26 | 2008-10-28 15:21:40 -0400 | [diff] [blame] | 994 | return atomic_long_read(&nfs_attr_generation_counter); |
Trond Myklebust | 4704f0e | 2008-10-14 19:16:07 -0400 | [diff] [blame] | 995 | } |
| 996 | |
| 997 | unsigned long nfs_inc_attr_generation_counter(void) |
| 998 | { |
Trond Myklebust | ae05f26 | 2008-10-28 15:21:40 -0400 | [diff] [blame] | 999 | return atomic_long_inc_return(&nfs_attr_generation_counter); |
Trond Myklebust | 4704f0e | 2008-10-14 19:16:07 -0400 | [diff] [blame] | 1000 | } |
| 1001 | |
| 1002 | void nfs_fattr_init(struct nfs_fattr *fattr) |
| 1003 | { |
| 1004 | fattr->valid = 0; |
| 1005 | fattr->time_start = jiffies; |
| 1006 | fattr->gencount = nfs_inc_attr_generation_counter(); |
| 1007 | } |
| 1008 | |
Trond Myklebust | 2d36bfde | 2010-04-16 16:22:45 -0400 | [diff] [blame] | 1009 | struct nfs_fattr *nfs_alloc_fattr(void) |
| 1010 | { |
| 1011 | struct nfs_fattr *fattr; |
| 1012 | |
| 1013 | fattr = kmalloc(sizeof(*fattr), GFP_NOFS); |
| 1014 | if (fattr != NULL) |
| 1015 | nfs_fattr_init(fattr); |
| 1016 | return fattr; |
| 1017 | } |
| 1018 | |
| 1019 | struct nfs_fh *nfs_alloc_fhandle(void) |
| 1020 | { |
| 1021 | struct nfs_fh *fh; |
| 1022 | |
| 1023 | fh = kmalloc(sizeof(struct nfs_fh), GFP_NOFS); |
| 1024 | if (fh != NULL) |
| 1025 | fh->size = 0; |
| 1026 | return fh; |
| 1027 | } |
| 1028 | |
Trond Myklebust | a10ad17 | 2008-09-23 17:28:41 -0400 | [diff] [blame] | 1029 | /** |
| 1030 | * nfs_inode_attrs_need_update - check if the inode attributes need updating |
| 1031 | * @inode - pointer to inode |
| 1032 | * @fattr - attributes |
| 1033 | * |
| 1034 | * Attempt to divine whether or not an RPC call reply carrying stale |
| 1035 | * attributes got scheduled after another call carrying updated ones. |
| 1036 | * |
| 1037 | * To do so, the function first assumes that a more recent ctime means |
| 1038 | * that the attributes in fattr are newer, however it also attempt to |
| 1039 | * catch the case where ctime either didn't change, or went backwards |
| 1040 | * (if someone reset the clock on the server) by looking at whether |
| 1041 | * 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] | 1042 | * Note also the check for wraparound of 'attr_gencount' |
Trond Myklebust | a10ad17 | 2008-09-23 17:28:41 -0400 | [diff] [blame] | 1043 | * |
| 1044 | * The function returns 'true' if it thinks the attributes in 'fattr' are |
| 1045 | * more recent than the ones cached in the inode. |
| 1046 | * |
| 1047 | */ |
| 1048 | static int nfs_inode_attrs_need_update(const struct inode *inode, const struct nfs_fattr *fattr) |
| 1049 | { |
| 1050 | const struct nfs_inode *nfsi = NFS_I(inode); |
| 1051 | |
Trond Myklebust | 4704f0e | 2008-10-14 19:16:07 -0400 | [diff] [blame] | 1052 | return ((long)fattr->gencount - (long)nfsi->attr_gencount) > 0 || |
Trond Myklebust | 03254e6 | 2008-10-09 13:27:55 -0400 | [diff] [blame] | 1053 | nfs_ctime_need_update(inode, fattr) || |
| 1054 | nfs_size_need_update(inode, fattr) || |
Trond Myklebust | 4704f0e | 2008-10-14 19:16:07 -0400 | [diff] [blame] | 1055 | ((long)nfsi->attr_gencount - (long)nfs_read_attr_generation_counter() > 0); |
Trond Myklebust | a10ad17 | 2008-09-23 17:28:41 -0400 | [diff] [blame] | 1056 | } |
| 1057 | |
Trond Myklebust | 870a5be | 2008-10-05 12:07:23 -0400 | [diff] [blame] | 1058 | static int nfs_refresh_inode_locked(struct inode *inode, struct nfs_fattr *fattr) |
| 1059 | { |
Trond Myklebust | a10ad17 | 2008-09-23 17:28:41 -0400 | [diff] [blame] | 1060 | if (nfs_inode_attrs_need_update(inode, fattr)) |
Trond Myklebust | 870a5be | 2008-10-05 12:07:23 -0400 | [diff] [blame] | 1061 | return nfs_update_inode(inode, fattr); |
| 1062 | return nfs_check_inode_attributes(inode, fattr); |
| 1063 | } |
| 1064 | |
Trond Myklebust | 3380114 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 1065 | /** |
| 1066 | * nfs_refresh_inode - try to update the inode attribute cache |
| 1067 | * @inode - pointer to inode |
| 1068 | * @fattr - updated attributes |
| 1069 | * |
| 1070 | * Check that an RPC call that returned attributes has not overlapped with |
| 1071 | * other recent updates of the inode metadata, then decide whether it is |
| 1072 | * safe to do a full update of the inode attributes, or whether just to |
| 1073 | * call nfs_check_inode_attributes. |
| 1074 | */ |
| 1075 | int nfs_refresh_inode(struct inode *inode, struct nfs_fattr *fattr) |
| 1076 | { |
Trond Myklebust | 3380114 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 1077 | int status; |
| 1078 | |
| 1079 | if ((fattr->valid & NFS_ATTR_FATTR) == 0) |
| 1080 | return 0; |
| 1081 | spin_lock(&inode->i_lock); |
Trond Myklebust | 870a5be | 2008-10-05 12:07:23 -0400 | [diff] [blame] | 1082 | status = nfs_refresh_inode_locked(inode, fattr); |
Trond Myklebust | 3380114 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 1083 | spin_unlock(&inode->i_lock); |
David Howells | ef79c09 | 2009-04-03 16:42:43 +0100 | [diff] [blame] | 1084 | |
Trond Myklebust | 3380114 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 1085 | return status; |
| 1086 | } |
| 1087 | |
Trond Myklebust | d65f557 | 2008-10-05 12:27:55 -0400 | [diff] [blame] | 1088 | static int nfs_post_op_update_inode_locked(struct inode *inode, struct nfs_fattr *fattr) |
| 1089 | { |
| 1090 | struct nfs_inode *nfsi = NFS_I(inode); |
| 1091 | |
| 1092 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; |
| 1093 | if (S_ISDIR(inode->i_mode)) |
| 1094 | nfsi->cache_validity |= NFS_INO_INVALID_DATA; |
| 1095 | if ((fattr->valid & NFS_ATTR_FATTR) == 0) |
| 1096 | return 0; |
| 1097 | return nfs_refresh_inode_locked(inode, fattr); |
| 1098 | } |
| 1099 | |
Trond Myklebust | decf491 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 1100 | /** |
| 1101 | * nfs_post_op_update_inode - try to update the inode attribute cache |
| 1102 | * @inode - pointer to inode |
| 1103 | * @fattr - updated attributes |
| 1104 | * |
| 1105 | * After an operation that has changed the inode metadata, mark the |
| 1106 | * attribute cache as being invalid, then try to update it. |
Chuck Lever | f551e44 | 2006-09-20 14:33:04 -0400 | [diff] [blame] | 1107 | * |
| 1108 | * NB: if the server didn't return any post op attributes, this |
| 1109 | * function will force the retrieval of attributes before the next |
| 1110 | * NFS request. Thus it should be used only for operations that |
| 1111 | * are expected to change one or more attributes, to avoid |
| 1112 | * unnecessary NFS requests and trips through nfs_update_inode(). |
Trond Myklebust | decf491 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 1113 | */ |
| 1114 | int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr) |
| 1115 | { |
Trond Myklebust | d65f557 | 2008-10-05 12:27:55 -0400 | [diff] [blame] | 1116 | int status; |
Trond Myklebust | decf491 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 1117 | |
Trond Myklebust | 7668fdb | 2007-10-01 09:59:15 -0400 | [diff] [blame] | 1118 | spin_lock(&inode->i_lock); |
Trond Myklebust | d65f557 | 2008-10-05 12:27:55 -0400 | [diff] [blame] | 1119 | status = nfs_post_op_update_inode_locked(inode, fattr); |
Trond Myklebust | 7668fdb | 2007-10-01 09:59:15 -0400 | [diff] [blame] | 1120 | spin_unlock(&inode->i_lock); |
Trond Myklebust | 870a5be | 2008-10-05 12:07:23 -0400 | [diff] [blame] | 1121 | return status; |
Trond Myklebust | decf491 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 1122 | } |
| 1123 | |
Trond Myklebust | 70ca885 | 2007-09-30 15:21:24 -0400 | [diff] [blame] | 1124 | /** |
| 1125 | * nfs_post_op_update_inode_force_wcc - try to update the inode attribute cache |
| 1126 | * @inode - pointer to inode |
| 1127 | * @fattr - updated attributes |
| 1128 | * |
| 1129 | * After an operation that has changed the inode metadata, mark the |
| 1130 | * attribute cache as being invalid, then try to update it. Fake up |
| 1131 | * weak cache consistency data, if none exist. |
| 1132 | * |
| 1133 | * This function is mainly designed to be used by the ->write_done() functions. |
| 1134 | */ |
| 1135 | int nfs_post_op_update_inode_force_wcc(struct inode *inode, struct nfs_fattr *fattr) |
| 1136 | { |
Trond Myklebust | d65f557 | 2008-10-05 12:27:55 -0400 | [diff] [blame] | 1137 | int status; |
| 1138 | |
| 1139 | spin_lock(&inode->i_lock); |
| 1140 | /* Don't do a WCC update if these attributes are already stale */ |
| 1141 | if ((fattr->valid & NFS_ATTR_FATTR) == 0 || |
| 1142 | !nfs_inode_attrs_need_update(inode, fattr)) { |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1143 | fattr->valid &= ~(NFS_ATTR_FATTR_PRECHANGE |
| 1144 | | NFS_ATTR_FATTR_PRESIZE |
| 1145 | | NFS_ATTR_FATTR_PREMTIME |
| 1146 | | NFS_ATTR_FATTR_PRECTIME); |
Trond Myklebust | d65f557 | 2008-10-05 12:27:55 -0400 | [diff] [blame] | 1147 | goto out_noforce; |
| 1148 | } |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1149 | if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 && |
| 1150 | (fattr->valid & NFS_ATTR_FATTR_PRECHANGE) == 0) { |
Trond Myklebust | 70ca885 | 2007-09-30 15:21:24 -0400 | [diff] [blame] | 1151 | fattr->pre_change_attr = NFS_I(inode)->change_attr; |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1152 | fattr->valid |= NFS_ATTR_FATTR_PRECHANGE; |
Trond Myklebust | 70ca885 | 2007-09-30 15:21:24 -0400 | [diff] [blame] | 1153 | } |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1154 | if ((fattr->valid & NFS_ATTR_FATTR_CTIME) != 0 && |
| 1155 | (fattr->valid & NFS_ATTR_FATTR_PRECTIME) == 0) { |
Trond Myklebust | 70ca885 | 2007-09-30 15:21:24 -0400 | [diff] [blame] | 1156 | memcpy(&fattr->pre_ctime, &inode->i_ctime, sizeof(fattr->pre_ctime)); |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1157 | fattr->valid |= NFS_ATTR_FATTR_PRECTIME; |
| 1158 | } |
| 1159 | if ((fattr->valid & NFS_ATTR_FATTR_MTIME) != 0 && |
| 1160 | (fattr->valid & NFS_ATTR_FATTR_PREMTIME) == 0) { |
Trond Myklebust | 70ca885 | 2007-09-30 15:21:24 -0400 | [diff] [blame] | 1161 | memcpy(&fattr->pre_mtime, &inode->i_mtime, sizeof(fattr->pre_mtime)); |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1162 | fattr->valid |= NFS_ATTR_FATTR_PREMTIME; |
| 1163 | } |
| 1164 | if ((fattr->valid & NFS_ATTR_FATTR_SIZE) != 0 && |
| 1165 | (fattr->valid & NFS_ATTR_FATTR_PRESIZE) == 0) { |
Trond Myklebust | a3d0145 | 2008-06-11 12:21:19 -0400 | [diff] [blame] | 1166 | fattr->pre_size = i_size_read(inode); |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1167 | fattr->valid |= NFS_ATTR_FATTR_PRESIZE; |
Trond Myklebust | 70ca885 | 2007-09-30 15:21:24 -0400 | [diff] [blame] | 1168 | } |
Trond Myklebust | d65f557 | 2008-10-05 12:27:55 -0400 | [diff] [blame] | 1169 | out_noforce: |
| 1170 | status = nfs_post_op_update_inode_locked(inode, fattr); |
| 1171 | spin_unlock(&inode->i_lock); |
| 1172 | return status; |
Trond Myklebust | 70ca885 | 2007-09-30 15:21:24 -0400 | [diff] [blame] | 1173 | } |
| 1174 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1175 | /* |
| 1176 | * Many nfs protocol calls return the new file attributes after |
| 1177 | * an operation. Here we update the inode to reflect the state |
| 1178 | * of the server's inode. |
| 1179 | * |
| 1180 | * This is a bit tricky because we have to make sure all dirty pages |
| 1181 | * have been sent off to the server before calling invalidate_inode_pages. |
| 1182 | * To make sure no other process adds more write requests while we try |
| 1183 | * our best to flush them, we make them sleep during the attribute refresh. |
| 1184 | * |
| 1185 | * A very similar scenario holds for the dir cache. |
| 1186 | */ |
Trond Myklebust | 24aa1fe | 2005-12-03 15:20:07 -0500 | [diff] [blame] | 1187 | static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1188 | { |
Trond Myklebust | 8b4bdcf | 2006-06-09 09:34:19 -0400 | [diff] [blame] | 1189 | struct nfs_server *server; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1190 | struct nfs_inode *nfsi = NFS_I(inode); |
Trond Myklebust | 951a143 | 2005-06-22 17:16:30 +0000 | [diff] [blame] | 1191 | loff_t cur_isize, new_isize; |
Trond Myklebust | 2a3f5fd | 2007-10-08 14:26:13 -0400 | [diff] [blame] | 1192 | unsigned long invalid = 0; |
Trond Myklebust | 3e7d950 | 2007-02-05 14:26:28 -0800 | [diff] [blame] | 1193 | unsigned long now = jiffies; |
Trond Myklebust | 62ab460c | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 1194 | unsigned long save_cache_validity; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1195 | |
| 1196 | dfprintk(VFS, "NFS: %s(%s/%ld ct=%d info=0x%x)\n", |
Harvey Harrison | 3110ff8 | 2008-05-02 13:42:44 -0700 | [diff] [blame] | 1197 | __func__, inode->i_sb->s_id, inode->i_ino, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1198 | atomic_read(&inode->i_count), fattr->valid); |
| 1199 | |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1200 | if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid) |
Chuck Lever | 325cfed | 2005-11-30 18:08:55 -0500 | [diff] [blame] | 1201 | goto out_fileid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1202 | |
| 1203 | /* |
| 1204 | * Make sure the inode's type hasn't changed. |
| 1205 | */ |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1206 | 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] | 1207 | goto out_changed; |
| 1208 | |
Trond Myklebust | 8b4bdcf | 2006-06-09 09:34:19 -0400 | [diff] [blame] | 1209 | server = NFS_SERVER(inode); |
Trond Myklebust | a035686 | 2007-06-05 13:26:15 -0400 | [diff] [blame] | 1210 | /* Update the fsid? */ |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1211 | if (S_ISDIR(inode->i_mode) && (fattr->valid & NFS_ATTR_FATTR_FSID) && |
Trond Myklebust | c37dcd33 | 2008-03-06 12:34:50 -0500 | [diff] [blame] | 1212 | !nfs_fsid_equal(&server->fsid, &fattr->fsid) && |
| 1213 | !test_bit(NFS_INO_MOUNTPOINT, &nfsi->flags)) |
Trond Myklebust | 8b4bdcf | 2006-06-09 09:34:19 -0400 | [diff] [blame] | 1214 | server->fsid = fattr->fsid; |
| 1215 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1216 | /* |
| 1217 | * Update the read time so we don't revalidate too often. |
| 1218 | */ |
Trond Myklebust | 3380114 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 1219 | nfsi->read_cache_jiffies = fattr->time_start; |
Trond Myklebust | 3e7d950 | 2007-02-05 14:26:28 -0800 | [diff] [blame] | 1220 | |
Trond Myklebust | 62ab460c | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 1221 | save_cache_validity = nfsi->cache_validity; |
| 1222 | nfsi->cache_validity &= ~(NFS_INO_INVALID_ATTR |
| 1223 | | NFS_INO_INVALID_ATIME |
| 1224 | | NFS_INO_REVAL_FORCED |
| 1225 | | NFS_INO_REVAL_PAGECACHE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1226 | |
Trond Myklebust | a895b4a | 2006-01-03 09:55:40 +0100 | [diff] [blame] | 1227 | /* Do atomic weak cache consistency updates */ |
| 1228 | nfs_wcc_update_inode(inode, fattr); |
| 1229 | |
Trond Myklebust | 47aabaa | 2007-09-27 15:57:24 -0400 | [diff] [blame] | 1230 | /* More cache consistency checks */ |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1231 | if (fattr->valid & NFS_ATTR_FATTR_CHANGE) { |
| 1232 | if (nfsi->change_attr != fattr->change_attr) { |
| 1233 | dprintk("NFS: change_attr change on server for file %s/%ld\n", |
| 1234 | inode->i_sb->s_id, inode->i_ino); |
| 1235 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
| 1236 | if (S_ISDIR(inode->i_mode)) |
| 1237 | nfs_force_lookup_revalidate(inode); |
| 1238 | nfsi->change_attr = fattr->change_attr; |
| 1239 | } |
Trond Myklebust | 62ab460c | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 1240 | } else if (server->caps & NFS_CAP_CHANGE_ATTR) |
| 1241 | invalid |= save_cache_validity; |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1242 | |
| 1243 | if (fattr->valid & NFS_ATTR_FATTR_MTIME) { |
Trond Myklebust | 47aabaa | 2007-09-27 15:57:24 -0400 | [diff] [blame] | 1244 | /* NFSv2/v3: Check if the mtime agrees */ |
| 1245 | if (!timespec_equal(&inode->i_mtime, &fattr->mtime)) { |
| 1246 | dprintk("NFS: mtime change on server for file %s/%ld\n", |
| 1247 | inode->i_sb->s_id, inode->i_ino); |
| 1248 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA; |
Trond Myklebust | bfc69a4 | 2007-10-15 18:18:29 -0400 | [diff] [blame] | 1249 | if (S_ISDIR(inode->i_mode)) |
| 1250 | nfs_force_lookup_revalidate(inode); |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1251 | memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime)); |
Trond Myklebust | 47aabaa | 2007-09-27 15:57:24 -0400 | [diff] [blame] | 1252 | } |
Trond Myklebust | 62ab460c | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 1253 | } else if (server->caps & NFS_CAP_MTIME) |
| 1254 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR |
| 1255 | | NFS_INO_INVALID_DATA |
| 1256 | | NFS_INO_REVAL_PAGECACHE |
| 1257 | | NFS_INO_REVAL_FORCED); |
| 1258 | |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1259 | if (fattr->valid & NFS_ATTR_FATTR_CTIME) { |
Trond Myklebust | 47aabaa | 2007-09-27 15:57:24 -0400 | [diff] [blame] | 1260 | /* If ctime has changed we should definitely clear access+acl caches */ |
NeilBrown | 37d9d76 | 2009-03-11 14:10:23 -0400 | [diff] [blame] | 1261 | if (!timespec_equal(&inode->i_ctime, &fattr->ctime)) { |
Trond Myklebust | 4704f0e | 2008-10-14 19:16:07 -0400 | [diff] [blame] | 1262 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
NeilBrown | 37d9d76 | 2009-03-11 14:10:23 -0400 | [diff] [blame] | 1263 | /* and probably clear data for a directory too as utimes can cause |
| 1264 | * havoc with our cache. |
| 1265 | */ |
| 1266 | if (S_ISDIR(inode->i_mode)) { |
| 1267 | invalid |= NFS_INO_INVALID_DATA; |
| 1268 | nfs_force_lookup_revalidate(inode); |
| 1269 | } |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1270 | memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime)); |
NeilBrown | 37d9d76 | 2009-03-11 14:10:23 -0400 | [diff] [blame] | 1271 | } |
Trond Myklebust | 62ab460c | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 1272 | } else if (server->caps & NFS_CAP_CTIME) |
| 1273 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR |
| 1274 | | NFS_INO_INVALID_ACCESS |
| 1275 | | NFS_INO_INVALID_ACL |
| 1276 | | NFS_INO_REVAL_FORCED); |
Trond Myklebust | 47aabaa | 2007-09-27 15:57:24 -0400 | [diff] [blame] | 1277 | |
Trond Myklebust | 951a143 | 2005-06-22 17:16:30 +0000 | [diff] [blame] | 1278 | /* Check if our cached file size is stale */ |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1279 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) { |
| 1280 | new_isize = nfs_size_to_loff_t(fattr->size); |
| 1281 | cur_isize = i_size_read(inode); |
| 1282 | if (new_isize != cur_isize) { |
| 1283 | /* Do we perhaps have any outstanding writes, or has |
| 1284 | * the file grown beyond our last write? */ |
| 1285 | if (nfsi->npages == 0 || new_isize > cur_isize) { |
| 1286 | i_size_write(inode, new_isize); |
| 1287 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA; |
| 1288 | } |
| 1289 | dprintk("NFS: isize change on server for file %s/%ld\n", |
| 1290 | inode->i_sb->s_id, inode->i_ino); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1291 | } |
Trond Myklebust | 62ab460c | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 1292 | } else |
| 1293 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR |
| 1294 | | NFS_INO_REVAL_PAGECACHE |
| 1295 | | NFS_INO_REVAL_FORCED); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1296 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1297 | |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1298 | if (fattr->valid & NFS_ATTR_FATTR_ATIME) |
| 1299 | memcpy(&inode->i_atime, &fattr->atime, sizeof(inode->i_atime)); |
Trond Myklebust | 62ab460c | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 1300 | else if (server->caps & NFS_CAP_ATIME) |
| 1301 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATIME |
| 1302 | | NFS_INO_REVAL_FORCED); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1303 | |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1304 | if (fattr->valid & NFS_ATTR_FATTR_MODE) { |
| 1305 | if ((inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) { |
Trond Myklebust | 9b4b351 | 2010-02-03 08:27:35 -0500 | [diff] [blame] | 1306 | umode_t newmode = inode->i_mode & S_IFMT; |
| 1307 | newmode |= fattr->mode & S_IALLUGO; |
| 1308 | inode->i_mode = newmode; |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1309 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1310 | } |
Trond Myklebust | 62ab460c | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 1311 | } else if (server->caps & NFS_CAP_MODE) |
| 1312 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR |
| 1313 | | NFS_INO_INVALID_ACCESS |
| 1314 | | NFS_INO_INVALID_ACL |
| 1315 | | NFS_INO_REVAL_FORCED); |
| 1316 | |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1317 | if (fattr->valid & NFS_ATTR_FATTR_OWNER) { |
| 1318 | if (inode->i_uid != fattr->uid) { |
| 1319 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
| 1320 | inode->i_uid = fattr->uid; |
| 1321 | } |
Trond Myklebust | 62ab460c | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 1322 | } else if (server->caps & NFS_CAP_OWNER) |
| 1323 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR |
| 1324 | | NFS_INO_INVALID_ACCESS |
| 1325 | | NFS_INO_INVALID_ACL |
| 1326 | | NFS_INO_REVAL_FORCED); |
| 1327 | |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1328 | if (fattr->valid & NFS_ATTR_FATTR_GROUP) { |
| 1329 | if (inode->i_gid != fattr->gid) { |
| 1330 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
| 1331 | inode->i_gid = fattr->gid; |
| 1332 | } |
Trond Myklebust | 62ab460c | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 1333 | } else if (server->caps & NFS_CAP_OWNER_GROUP) |
| 1334 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR |
| 1335 | | NFS_INO_INVALID_ACCESS |
| 1336 | | NFS_INO_INVALID_ACL |
| 1337 | | NFS_INO_REVAL_FORCED); |
Trond Myklebust | 921615f | 2008-10-14 19:23:07 -0400 | [diff] [blame] | 1338 | |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1339 | if (fattr->valid & NFS_ATTR_FATTR_NLINK) { |
| 1340 | if (inode->i_nlink != fattr->nlink) { |
| 1341 | invalid |= NFS_INO_INVALID_ATTR; |
| 1342 | if (S_ISDIR(inode->i_mode)) |
| 1343 | invalid |= NFS_INO_INVALID_DATA; |
| 1344 | inode->i_nlink = fattr->nlink; |
| 1345 | } |
Trond Myklebust | 62ab460c | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 1346 | } else if (server->caps & NFS_CAP_NLINK) |
| 1347 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR |
| 1348 | | NFS_INO_REVAL_FORCED); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1349 | |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1350 | if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1351 | /* |
| 1352 | * report the blocks in 512byte units |
| 1353 | */ |
| 1354 | inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1355 | } |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1356 | if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED) |
| 1357 | inode->i_blocks = fattr->du.nfs2.blocks; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1358 | |
| 1359 | /* Update attrtimeo value if we're out of the unstable period */ |
| 1360 | if (invalid & NFS_INO_INVALID_ATTR) { |
Chuck Lever | 91d5b47 | 2006-03-20 13:44:14 -0500 | [diff] [blame] | 1361 | nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1362 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); |
Trond Myklebust | 3e7d950 | 2007-02-05 14:26:28 -0800 | [diff] [blame] | 1363 | nfsi->attrtimeo_timestamp = now; |
Trond Myklebust | 4704f0e | 2008-10-14 19:16:07 -0400 | [diff] [blame] | 1364 | nfsi->attr_gencount = nfs_inc_attr_generation_counter(); |
Trond Myklebust | 6d2b296 | 2007-10-01 18:57:50 -0400 | [diff] [blame] | 1365 | } else { |
Peter Staubach | 64672d5 | 2008-12-23 15:21:56 -0500 | [diff] [blame] | 1366 | 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] | 1367 | if ((nfsi->attrtimeo <<= 1) > NFS_MAXATTRTIMEO(inode)) |
| 1368 | nfsi->attrtimeo = NFS_MAXATTRTIMEO(inode); |
| 1369 | nfsi->attrtimeo_timestamp = now; |
| 1370 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1371 | } |
Trond Myklebust | f2115dc | 2007-08-15 12:49:17 -0400 | [diff] [blame] | 1372 | invalid &= ~NFS_INO_INVALID_ATTR; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1373 | /* Don't invalidate the data if we were to blame */ |
| 1374 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) |
| 1375 | || S_ISLNK(inode->i_mode))) |
| 1376 | invalid &= ~NFS_INO_INVALID_DATA; |
Trond Myklebust | 412c77c | 2007-07-03 16:10:55 -0400 | [diff] [blame] | 1377 | if (!nfs_have_delegation(inode, FMODE_READ) || |
Trond Myklebust | 62ab460c | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 1378 | (save_cache_validity & NFS_INO_REVAL_FORCED)) |
Chuck Lever | 5529680 | 2005-08-18 11:24:09 -0700 | [diff] [blame] | 1379 | nfsi->cache_validity |= invalid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1380 | |
| 1381 | return 0; |
| 1382 | out_changed: |
| 1383 | /* |
| 1384 | * Big trouble! The inode has become a different object. |
| 1385 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1386 | printk(KERN_DEBUG "%s: inode %ld mode changed, %07o to %07o\n", |
Harvey Harrison | 3110ff8 | 2008-05-02 13:42:44 -0700 | [diff] [blame] | 1387 | __func__, inode->i_ino, inode->i_mode, fattr->mode); |
Trond Myklebust | b37b03b | 2005-11-25 17:10:06 -0500 | [diff] [blame] | 1388 | out_err: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1389 | /* |
| 1390 | * No need to worry about unhashing the dentry, as the |
| 1391 | * lookup validation will know that the inode is bad. |
| 1392 | * (But we fall through to invalidate the caches.) |
| 1393 | */ |
| 1394 | nfs_invalidate_inode(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1395 | return -ESTALE; |
Chuck Lever | 325cfed | 2005-11-30 18:08:55 -0500 | [diff] [blame] | 1396 | |
| 1397 | out_fileid: |
| 1398 | printk(KERN_ERR "NFS: server %s error: fileid changed\n" |
| 1399 | "fsid %s: expected fileid 0x%Lx, got 0x%Lx\n", |
David Howells | 54ceac4 | 2006-08-22 20:06:13 -0400 | [diff] [blame] | 1400 | NFS_SERVER(inode)->nfs_client->cl_hostname, inode->i_sb->s_id, |
Chuck Lever | 325cfed | 2005-11-30 18:08:55 -0500 | [diff] [blame] | 1401 | (long long)nfsi->fileid, (long long)fattr->fileid); |
| 1402 | goto out_err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1403 | } |
| 1404 | |
Trond Myklebust | 55a9759 | 2006-06-09 09:34:19 -0400 | [diff] [blame] | 1405 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1406 | #ifdef CONFIG_NFS_V4 |
| 1407 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1408 | /* |
| 1409 | * Clean out any remaining NFSv4 state that might be left over due |
| 1410 | * to open() calls that passed nfs_atomic_lookup, but failed to call |
| 1411 | * nfs_open(). |
| 1412 | */ |
Al Viro | b57922d | 2010-06-07 14:34:48 -0400 | [diff] [blame] | 1413 | void nfs4_evict_inode(struct inode *inode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1414 | { |
Al Viro | b57922d | 2010-06-07 14:34:48 -0400 | [diff] [blame] | 1415 | truncate_inode_pages(&inode->i_data, 0); |
| 1416 | end_writeback(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1417 | /* If we are holding a delegation, return it! */ |
Trond Myklebust | e6f8107 | 2008-01-24 18:14:34 -0500 | [diff] [blame] | 1418 | nfs_inode_return_delegation_noreclaim(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1419 | /* First call standard NFS clear_inode() code */ |
| 1420 | nfs_clear_inode(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1421 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1422 | #endif |
| 1423 | |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 1424 | struct inode *nfs_alloc_inode(struct super_block *sb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1425 | { |
| 1426 | struct nfs_inode *nfsi; |
Christoph Lameter | e94b176 | 2006-12-06 20:33:17 -0800 | [diff] [blame] | 1427 | nfsi = (struct nfs_inode *)kmem_cache_alloc(nfs_inode_cachep, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1428 | if (!nfsi) |
| 1429 | return NULL; |
Chuck Lever | 5529680 | 2005-08-18 11:24:09 -0700 | [diff] [blame] | 1430 | nfsi->flags = 0UL; |
| 1431 | nfsi->cache_validity = 0UL; |
Trond Myklebust | 458818e | 2005-06-22 17:16:27 +0000 | [diff] [blame] | 1432 | #ifdef CONFIG_NFS_V3_ACL |
| 1433 | nfsi->acl_access = ERR_PTR(-EAGAIN); |
| 1434 | nfsi->acl_default = ERR_PTR(-EAGAIN); |
| 1435 | #endif |
J. Bruce Fields | e50a1c2 | 2005-06-22 17:16:23 +0000 | [diff] [blame] | 1436 | #ifdef CONFIG_NFS_V4 |
| 1437 | nfsi->nfs4_acl = NULL; |
| 1438 | #endif /* CONFIG_NFS_V4 */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1439 | return &nfsi->vfs_inode; |
| 1440 | } |
| 1441 | |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 1442 | void nfs_destroy_inode(struct inode *inode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1443 | { |
| 1444 | kmem_cache_free(nfs_inode_cachep, NFS_I(inode)); |
| 1445 | } |
| 1446 | |
Andrew Morton | d75d541 | 2006-06-25 02:41:26 -0700 | [diff] [blame] | 1447 | static inline void nfs4_init_once(struct nfs_inode *nfsi) |
| 1448 | { |
| 1449 | #ifdef CONFIG_NFS_V4 |
| 1450 | INIT_LIST_HEAD(&nfsi->open_states); |
| 1451 | nfsi->delegation = NULL; |
| 1452 | nfsi->delegation_state = 0; |
| 1453 | init_rwsem(&nfsi->rwsem); |
| 1454 | #endif |
| 1455 | } |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 1456 | |
Alexey Dobriyan | 51cc506 | 2008-07-25 19:45:34 -0700 | [diff] [blame] | 1457 | static void init_once(void *foo) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1458 | { |
| 1459 | struct nfs_inode *nfsi = (struct nfs_inode *) foo; |
| 1460 | |
Christoph Lameter | a35afb8 | 2007-05-16 22:10:57 -0700 | [diff] [blame] | 1461 | inode_init_once(&nfsi->vfs_inode); |
Christoph Lameter | a35afb8 | 2007-05-16 22:10:57 -0700 | [diff] [blame] | 1462 | INIT_LIST_HEAD(&nfsi->open_files); |
| 1463 | INIT_LIST_HEAD(&nfsi->access_cache_entry_lru); |
| 1464 | INIT_LIST_HEAD(&nfsi->access_cache_inode_lru); |
| 1465 | INIT_RADIX_TREE(&nfsi->nfs_page_tree, GFP_ATOMIC); |
Christoph Lameter | a35afb8 | 2007-05-16 22:10:57 -0700 | [diff] [blame] | 1466 | nfsi->npages = 0; |
Trond Myklebust | ff778d0 | 2010-02-19 16:53:39 -0800 | [diff] [blame] | 1467 | nfsi->ncommit = 0; |
Trond Myklebust | 565277f | 2007-10-15 18:17:53 -0400 | [diff] [blame] | 1468 | atomic_set(&nfsi->silly_count, 1); |
| 1469 | INIT_HLIST_HEAD(&nfsi->silly_list); |
| 1470 | init_waitqueue_head(&nfsi->waitqueue); |
Christoph Lameter | a35afb8 | 2007-05-16 22:10:57 -0700 | [diff] [blame] | 1471 | nfs4_init_once(nfsi); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1472 | } |
Paul Mundt | 20c2df8 | 2007-07-20 10:11:58 +0900 | [diff] [blame] | 1473 | |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 1474 | static int __init nfs_init_inodecache(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1475 | { |
| 1476 | nfs_inode_cachep = kmem_cache_create("nfs_inode_cache", |
| 1477 | sizeof(struct nfs_inode), |
Paul Jackson | fffb60f | 2006-03-24 03:16:06 -0800 | [diff] [blame] | 1478 | 0, (SLAB_RECLAIM_ACCOUNT| |
| 1479 | SLAB_MEM_SPREAD), |
Paul Mundt | 20c2df8 | 2007-07-20 10:11:58 +0900 | [diff] [blame] | 1480 | init_once); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1481 | if (nfs_inode_cachep == NULL) |
| 1482 | return -ENOMEM; |
| 1483 | |
| 1484 | return 0; |
| 1485 | } |
| 1486 | |
David Brownell | 266bee8 | 2006-06-27 12:59:15 -0700 | [diff] [blame] | 1487 | static void nfs_destroy_inodecache(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1488 | { |
Alexey Dobriyan | 1a1d92c | 2006-09-27 01:49:40 -0700 | [diff] [blame] | 1489 | kmem_cache_destroy(nfs_inode_cachep); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1490 | } |
| 1491 | |
Trond Myklebust | 5746006 | 2008-02-19 20:04:22 -0500 | [diff] [blame] | 1492 | struct workqueue_struct *nfsiod_workqueue; |
| 1493 | |
| 1494 | /* |
| 1495 | * start up the nfsiod workqueue |
| 1496 | */ |
| 1497 | static int nfsiod_start(void) |
| 1498 | { |
| 1499 | struct workqueue_struct *wq; |
| 1500 | dprintk("RPC: creating workqueue nfsiod\n"); |
Trond Myklebust | 6095889 | 2010-09-21 16:55:31 -0400 | [diff] [blame] | 1501 | wq = alloc_workqueue("nfsiod", WQ_RESCUER, 0); |
Trond Myklebust | 5746006 | 2008-02-19 20:04:22 -0500 | [diff] [blame] | 1502 | if (wq == NULL) |
| 1503 | return -ENOMEM; |
| 1504 | nfsiod_workqueue = wq; |
| 1505 | return 0; |
| 1506 | } |
| 1507 | |
| 1508 | /* |
| 1509 | * Destroy the nfsiod workqueue |
| 1510 | */ |
| 1511 | static void nfsiod_stop(void) |
| 1512 | { |
| 1513 | struct workqueue_struct *wq; |
| 1514 | |
| 1515 | wq = nfsiod_workqueue; |
| 1516 | if (wq == NULL) |
| 1517 | return; |
| 1518 | nfsiod_workqueue = NULL; |
| 1519 | destroy_workqueue(wq); |
| 1520 | } |
| 1521 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1522 | /* |
| 1523 | * Initialize NFS |
| 1524 | */ |
| 1525 | static int __init init_nfs_fs(void) |
| 1526 | { |
| 1527 | int err; |
| 1528 | |
Bryan Schumaker | 955a857 | 2010-09-29 15:41:49 -0400 | [diff] [blame] | 1529 | err = nfs_idmap_init(); |
| 1530 | if (err < 0) |
| 1531 | goto out9; |
| 1532 | |
Trond Myklebust | e571cbf | 2009-08-19 18:12:27 -0400 | [diff] [blame] | 1533 | err = nfs_dns_resolver_init(); |
| 1534 | if (err < 0) |
| 1535 | goto out8; |
| 1536 | |
David Howells | 8ec442a | 2009-04-03 16:42:42 +0100 | [diff] [blame] | 1537 | err = nfs_fscache_register(); |
| 1538 | if (err < 0) |
| 1539 | goto out7; |
| 1540 | |
Trond Myklebust | 5746006 | 2008-02-19 20:04:22 -0500 | [diff] [blame] | 1541 | err = nfsiod_start(); |
| 1542 | if (err) |
| 1543 | goto out6; |
| 1544 | |
David Howells | 6aaca56 | 2006-08-22 20:06:13 -0400 | [diff] [blame] | 1545 | err = nfs_fs_proc_init(); |
| 1546 | if (err) |
| 1547 | goto out5; |
| 1548 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1549 | err = nfs_init_nfspagecache(); |
| 1550 | if (err) |
| 1551 | goto out4; |
| 1552 | |
| 1553 | err = nfs_init_inodecache(); |
| 1554 | if (err) |
| 1555 | goto out3; |
| 1556 | |
| 1557 | err = nfs_init_readpagecache(); |
| 1558 | if (err) |
| 1559 | goto out2; |
| 1560 | |
| 1561 | err = nfs_init_writepagecache(); |
| 1562 | if (err) |
| 1563 | goto out1; |
| 1564 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1565 | err = nfs_init_directcache(); |
| 1566 | if (err) |
| 1567 | goto out0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1568 | |
| 1569 | #ifdef CONFIG_PROC_FS |
| 1570 | rpc_proc_register(&nfs_rpcstat); |
| 1571 | #endif |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 1572 | if ((err = register_nfs_fs()) != 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1573 | goto out; |
| 1574 | return 0; |
| 1575 | out: |
| 1576 | #ifdef CONFIG_PROC_FS |
| 1577 | rpc_proc_unregister("nfs"); |
| 1578 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1579 | nfs_destroy_directcache(); |
Chuck Lever | 6b59a75 | 2005-11-30 18:08:19 -0500 | [diff] [blame] | 1580 | out0: |
Chuck Lever | 6b59a75 | 2005-11-30 18:08:19 -0500 | [diff] [blame] | 1581 | nfs_destroy_writepagecache(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1582 | out1: |
| 1583 | nfs_destroy_readpagecache(); |
| 1584 | out2: |
| 1585 | nfs_destroy_inodecache(); |
| 1586 | out3: |
| 1587 | nfs_destroy_nfspagecache(); |
| 1588 | out4: |
David Howells | 6aaca56 | 2006-08-22 20:06:13 -0400 | [diff] [blame] | 1589 | nfs_fs_proc_exit(); |
| 1590 | out5: |
Trond Myklebust | 5746006 | 2008-02-19 20:04:22 -0500 | [diff] [blame] | 1591 | nfsiod_stop(); |
| 1592 | out6: |
David Howells | 8ec442a | 2009-04-03 16:42:42 +0100 | [diff] [blame] | 1593 | nfs_fscache_unregister(); |
| 1594 | out7: |
Trond Myklebust | e571cbf | 2009-08-19 18:12:27 -0400 | [diff] [blame] | 1595 | nfs_dns_resolver_destroy(); |
| 1596 | out8: |
Bryan Schumaker | 955a857 | 2010-09-29 15:41:49 -0400 | [diff] [blame] | 1597 | nfs_idmap_quit(); |
| 1598 | out9: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1599 | return err; |
| 1600 | } |
| 1601 | |
| 1602 | static void __exit exit_nfs_fs(void) |
| 1603 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1604 | nfs_destroy_directcache(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1605 | nfs_destroy_writepagecache(); |
| 1606 | nfs_destroy_readpagecache(); |
| 1607 | nfs_destroy_inodecache(); |
| 1608 | nfs_destroy_nfspagecache(); |
David Howells | 8ec442a | 2009-04-03 16:42:42 +0100 | [diff] [blame] | 1609 | nfs_fscache_unregister(); |
Trond Myklebust | e571cbf | 2009-08-19 18:12:27 -0400 | [diff] [blame] | 1610 | nfs_dns_resolver_destroy(); |
Bryan Schumaker | 955a857 | 2010-09-29 15:41:49 -0400 | [diff] [blame] | 1611 | nfs_idmap_quit(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1612 | #ifdef CONFIG_PROC_FS |
| 1613 | rpc_proc_unregister("nfs"); |
| 1614 | #endif |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 1615 | unregister_nfs_fs(); |
David Howells | 6aaca56 | 2006-08-22 20:06:13 -0400 | [diff] [blame] | 1616 | nfs_fs_proc_exit(); |
Trond Myklebust | 5746006 | 2008-02-19 20:04:22 -0500 | [diff] [blame] | 1617 | nfsiod_stop(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1618 | } |
| 1619 | |
| 1620 | /* Not quite true; I just maintain it */ |
| 1621 | MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>"); |
| 1622 | MODULE_LICENSE("GPL"); |
Trond Myklebust | f43bf0b | 2007-10-09 12:01:04 -0400 | [diff] [blame] | 1623 | module_param(enable_ino64, bool, 0644); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1624 | |
| 1625 | module_init(init_nfs_fs) |
| 1626 | module_exit(exit_nfs_fs) |