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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 237 | /* |
| 238 | * This is our front-end to iget that looks up inodes by file handle |
| 239 | * instead of inode number. |
| 240 | */ |
| 241 | struct inode * |
| 242 | nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr) |
| 243 | { |
| 244 | struct nfs_find_desc desc = { |
| 245 | .fh = fh, |
| 246 | .fattr = fattr |
| 247 | }; |
Trond Myklebust | 03f28e3 | 2006-03-20 13:44:48 -0500 | [diff] [blame] | 248 | struct inode *inode = ERR_PTR(-ENOENT); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 249 | unsigned long hash; |
| 250 | |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 251 | if ((fattr->valid & NFS_ATTR_FATTR_FILEID) == 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 252 | goto out_no_inode; |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 253 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) == 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 254 | goto out_no_inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 255 | |
| 256 | hash = nfs_fattr_to_ino_t(fattr); |
| 257 | |
Trond Myklebust | 03f28e3 | 2006-03-20 13:44:48 -0500 | [diff] [blame] | 258 | inode = iget5_locked(sb, hash, nfs_find_actor, nfs_init_locked, &desc); |
| 259 | if (inode == NULL) { |
| 260 | inode = ERR_PTR(-ENOMEM); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 261 | goto out_no_inode; |
Trond Myklebust | 03f28e3 | 2006-03-20 13:44:48 -0500 | [diff] [blame] | 262 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 263 | |
| 264 | if (inode->i_state & I_NEW) { |
| 265 | struct nfs_inode *nfsi = NFS_I(inode); |
Trond Myklebust | b0c4fdd | 2007-02-05 14:44:22 -0800 | [diff] [blame] | 266 | unsigned long now = jiffies; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 267 | |
| 268 | /* We set i_ino for the few things that still rely on it, |
| 269 | * such as stat(2) */ |
| 270 | inode->i_ino = hash; |
| 271 | |
| 272 | /* We can't support update_atime(), since the server will reset it */ |
| 273 | inode->i_flags |= S_NOATIME|S_NOCMTIME; |
| 274 | inode->i_mode = fattr->mode; |
Trond Myklebust | 62ab460 | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 275 | if ((fattr->valid & NFS_ATTR_FATTR_MODE) == 0 |
| 276 | && nfs_server_capable(inode, NFS_CAP_MODE)) |
| 277 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR |
| 278 | | NFS_INO_INVALID_ACCESS |
| 279 | | NFS_INO_INVALID_ACL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 280 | /* Why so? Because we want revalidate for devices/FIFOs, and |
| 281 | * that's precisely what we have in nfs_file_inode_operations. |
| 282 | */ |
David Howells | 8fa5c00 | 2006-08-22 20:06:12 -0400 | [diff] [blame] | 283 | 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] | 284 | if (S_ISREG(inode->i_mode)) { |
| 285 | inode->i_fop = &nfs_file_operations; |
| 286 | inode->i_data.a_ops = &nfs_file_aops; |
| 287 | inode->i_data.backing_dev_info = &NFS_SB(sb)->backing_dev_info; |
| 288 | } else if (S_ISDIR(inode->i_mode)) { |
David Howells | 8fa5c00 | 2006-08-22 20:06:12 -0400 | [diff] [blame] | 289 | 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] | 290 | inode->i_fop = &nfs_dir_operations; |
Bryan Schumaker | 0715dc6 | 2010-09-24 18:50:01 -0400 | [diff] [blame^] | 291 | if (nfs_server_capable(inode, NFS_CAP_READDIRPLUS)) |
Benny Halevy | 3a10c30 | 2008-01-23 08:58:59 +0200 | [diff] [blame] | 292 | set_bit(NFS_INO_ADVISE_RDPLUS, &NFS_I(inode)->flags); |
Trond Myklebust | 55a9759 | 2006-06-09 09:34:19 -0400 | [diff] [blame] | 293 | /* Deal with crossing mountpoints */ |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 294 | if ((fattr->valid & NFS_ATTR_FATTR_FSID) |
| 295 | && !nfs_fsid_equal(&NFS_SB(sb)->fsid, &fattr->fsid)) { |
Manoj Naik | 6b97fd3 | 2006-06-09 09:34:29 -0400 | [diff] [blame] | 296 | if (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) |
| 297 | inode->i_op = &nfs_referral_inode_operations; |
| 298 | else |
| 299 | inode->i_op = &nfs_mountpoint_inode_operations; |
Trond Myklebust | 55a9759 | 2006-06-09 09:34:19 -0400 | [diff] [blame] | 300 | inode->i_fop = NULL; |
Trond Myklebust | c37dcd33 | 2008-03-06 12:34:50 -0500 | [diff] [blame] | 301 | set_bit(NFS_INO_MOUNTPOINT, &nfsi->flags); |
Trond Myklebust | 55a9759 | 2006-06-09 09:34:19 -0400 | [diff] [blame] | 302 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 303 | } else if (S_ISLNK(inode->i_mode)) |
| 304 | inode->i_op = &nfs_symlink_inode_operations; |
| 305 | else |
| 306 | init_special_inode(inode, inode->i_mode, fattr->rdev); |
| 307 | |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 308 | memset(&inode->i_atime, 0, sizeof(inode->i_atime)); |
| 309 | memset(&inode->i_mtime, 0, sizeof(inode->i_mtime)); |
| 310 | memset(&inode->i_ctime, 0, sizeof(inode->i_ctime)); |
| 311 | nfsi->change_attr = 0; |
| 312 | inode->i_size = 0; |
| 313 | inode->i_nlink = 0; |
| 314 | inode->i_uid = -2; |
| 315 | inode->i_gid = -2; |
| 316 | inode->i_blocks = 0; |
| 317 | memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf)); |
| 318 | |
Trond Myklebust | 3380114 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 319 | nfsi->read_cache_jiffies = fattr->time_start; |
Trond Myklebust | 4704f0e | 2008-10-14 19:16:07 -0400 | [diff] [blame] | 320 | nfsi->attr_gencount = fattr->gencount; |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 321 | if (fattr->valid & NFS_ATTR_FATTR_ATIME) |
| 322 | inode->i_atime = fattr->atime; |
Trond Myklebust | 62ab460 | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 323 | else if (nfs_server_capable(inode, NFS_CAP_ATIME)) |
| 324 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 325 | if (fattr->valid & NFS_ATTR_FATTR_MTIME) |
| 326 | inode->i_mtime = fattr->mtime; |
Trond Myklebust | 62ab460 | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 327 | else if (nfs_server_capable(inode, NFS_CAP_MTIME)) |
| 328 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR |
| 329 | | NFS_INO_INVALID_DATA; |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 330 | if (fattr->valid & NFS_ATTR_FATTR_CTIME) |
| 331 | inode->i_ctime = fattr->ctime; |
Trond Myklebust | 62ab460 | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 332 | else if (nfs_server_capable(inode, NFS_CAP_CTIME)) |
| 333 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR |
| 334 | | NFS_INO_INVALID_ACCESS |
| 335 | | NFS_INO_INVALID_ACL; |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 336 | if (fattr->valid & NFS_ATTR_FATTR_CHANGE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 337 | nfsi->change_attr = fattr->change_attr; |
Trond Myklebust | 62ab460 | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 338 | else if (nfs_server_capable(inode, NFS_CAP_CHANGE_ATTR)) |
| 339 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR |
| 340 | | NFS_INO_INVALID_DATA; |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 341 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) |
| 342 | inode->i_size = nfs_size_to_loff_t(fattr->size); |
Trond Myklebust | 62ab460 | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 343 | else |
| 344 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR |
| 345 | | NFS_INO_INVALID_DATA |
| 346 | | NFS_INO_REVAL_PAGECACHE; |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 347 | if (fattr->valid & NFS_ATTR_FATTR_NLINK) |
| 348 | inode->i_nlink = fattr->nlink; |
Trond Myklebust | 62ab460 | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 349 | else if (nfs_server_capable(inode, NFS_CAP_NLINK)) |
| 350 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 351 | if (fattr->valid & NFS_ATTR_FATTR_OWNER) |
| 352 | inode->i_uid = fattr->uid; |
Trond Myklebust | 62ab460 | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 353 | else if (nfs_server_capable(inode, NFS_CAP_OWNER)) |
| 354 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR |
| 355 | | NFS_INO_INVALID_ACCESS |
| 356 | | NFS_INO_INVALID_ACL; |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 357 | if (fattr->valid & NFS_ATTR_FATTR_GROUP) |
| 358 | inode->i_gid = fattr->gid; |
Trond Myklebust | 62ab460 | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 359 | else if (nfs_server_capable(inode, NFS_CAP_OWNER_GROUP)) |
| 360 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR |
| 361 | | NFS_INO_INVALID_ACCESS |
| 362 | | NFS_INO_INVALID_ACL; |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 363 | if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED) |
| 364 | inode->i_blocks = fattr->du.nfs2.blocks; |
| 365 | if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 366 | /* |
| 367 | * report the blocks in 512byte units |
| 368 | */ |
| 369 | inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 370 | } |
| 371 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); |
Trond Myklebust | b0c4fdd | 2007-02-05 14:44:22 -0800 | [diff] [blame] | 372 | nfsi->attrtimeo_timestamp = now; |
Trond Myklebust | 1c3c07e | 2006-07-25 11:28:18 -0400 | [diff] [blame] | 373 | nfsi->access_cache = RB_ROOT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 374 | |
David Howells | ef79c09 | 2009-04-03 16:42:43 +0100 | [diff] [blame] | 375 | nfs_fscache_init_inode_cookie(inode); |
| 376 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 377 | unlock_new_inode(inode); |
| 378 | } else |
| 379 | nfs_refresh_inode(inode, fattr); |
| 380 | dprintk("NFS: nfs_fhget(%s/%Ld ct=%d)\n", |
| 381 | inode->i_sb->s_id, |
| 382 | (long long)NFS_FILEID(inode), |
| 383 | atomic_read(&inode->i_count)); |
| 384 | |
| 385 | out: |
| 386 | return inode; |
| 387 | |
| 388 | out_no_inode: |
Trond Myklebust | 03f28e3 | 2006-03-20 13:44:48 -0500 | [diff] [blame] | 389 | dprintk("nfs_fhget: iget failed with error %ld\n", PTR_ERR(inode)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 390 | goto out; |
| 391 | } |
| 392 | |
Trond Myklebust | 659bfcd | 2008-06-10 19:39:41 -0400 | [diff] [blame] | 393 | #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] | 394 | |
| 395 | int |
| 396 | nfs_setattr(struct dentry *dentry, struct iattr *attr) |
| 397 | { |
| 398 | struct inode *inode = dentry->d_inode; |
Trond Myklebust | 987f8df | 2010-04-16 16:22:52 -0400 | [diff] [blame] | 399 | struct nfs_fattr *fattr; |
| 400 | int error = -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 401 | |
Chuck Lever | 91d5b47 | 2006-03-20 13:44:14 -0500 | [diff] [blame] | 402 | nfs_inc_stats(inode, NFSIOS_VFSSETATTR); |
| 403 | |
Jeff Layton | 188b95d | 2007-10-18 03:05:21 -0700 | [diff] [blame] | 404 | /* skip mode change if it's just for clearing setuid/setgid */ |
| 405 | if (attr->ia_valid & (ATTR_KILL_SUID | ATTR_KILL_SGID)) |
| 406 | attr->ia_valid &= ~ATTR_MODE; |
| 407 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 408 | if (attr->ia_valid & ATTR_SIZE) { |
| 409 | if (!S_ISREG(inode->i_mode) || attr->ia_size == i_size_read(inode)) |
| 410 | attr->ia_valid &= ~ATTR_SIZE; |
| 411 | } |
| 412 | |
| 413 | /* Optimization: if the end result is no change, don't RPC */ |
| 414 | attr->ia_valid &= NFS_VALID_ATTRS; |
Trond Myklebust | 659bfcd | 2008-06-10 19:39:41 -0400 | [diff] [blame] | 415 | if ((attr->ia_valid & ~ATTR_FILE) == 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 416 | return 0; |
| 417 | |
Trond Myklebust | 755c1e2 | 2006-03-20 13:44:06 -0500 | [diff] [blame] | 418 | /* Write all dirty data */ |
Trond Myklebust | 1b924e5 | 2010-07-31 14:29:06 -0400 | [diff] [blame] | 419 | if (S_ISREG(inode->i_mode)) |
Trond Myklebust | e1552e1 | 2007-04-14 19:07:28 -0400 | [diff] [blame] | 420 | nfs_wb_all(inode); |
Trond Myklebust | 987f8df | 2010-04-16 16:22:52 -0400 | [diff] [blame] | 421 | |
| 422 | fattr = nfs_alloc_fattr(); |
| 423 | if (fattr == NULL) |
| 424 | goto out; |
Trond Myklebust | 642ac54 | 2005-10-18 14:20:19 -0700 | [diff] [blame] | 425 | /* |
| 426 | * Return any delegations if we're going to change ACLs |
| 427 | */ |
| 428 | if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) |
| 429 | nfs_inode_return_delegation(inode); |
Trond Myklebust | 987f8df | 2010-04-16 16:22:52 -0400 | [diff] [blame] | 430 | error = NFS_PROTO(inode)->setattr(dentry, fattr, attr); |
Trond Myklebust | 65e4308 | 2005-08-16 11:49:44 -0400 | [diff] [blame] | 431 | if (error == 0) |
Trond Myklebust | 987f8df | 2010-04-16 16:22:52 -0400 | [diff] [blame] | 432 | nfs_refresh_inode(inode, fattr); |
| 433 | nfs_free_fattr(fattr); |
| 434 | out: |
Trond Myklebust | 65e4308 | 2005-08-16 11:49:44 -0400 | [diff] [blame] | 435 | return error; |
| 436 | } |
| 437 | |
| 438 | /** |
Trond Myklebust | a3d0145 | 2008-06-11 12:21:19 -0400 | [diff] [blame] | 439 | * nfs_vmtruncate - unmap mappings "freed" by truncate() syscall |
| 440 | * @inode: inode of the file used |
| 441 | * @offset: file offset to start truncating |
| 442 | * |
| 443 | * This is a copy of the common vmtruncate, but with the locking |
| 444 | * corrected to take into account the fact that NFS requires |
| 445 | * inode->i_size to be updated under the inode->i_lock. |
| 446 | */ |
| 447 | static int nfs_vmtruncate(struct inode * inode, loff_t offset) |
| 448 | { |
npiggin@suse.de | c08d3b0 | 2009-08-21 02:35:06 +1000 | [diff] [blame] | 449 | loff_t oldsize; |
| 450 | int err; |
Trond Myklebust | a3d0145 | 2008-06-11 12:21:19 -0400 | [diff] [blame] | 451 | |
npiggin@suse.de | c08d3b0 | 2009-08-21 02:35:06 +1000 | [diff] [blame] | 452 | err = inode_newsize_ok(inode, offset); |
| 453 | if (err) |
| 454 | goto out; |
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 | spin_lock(&inode->i_lock); |
| 457 | oldsize = inode->i_size; |
| 458 | i_size_write(inode, offset); |
| 459 | spin_unlock(&inode->i_lock); |
Trond Myklebust | a3d0145 | 2008-06-11 12:21:19 -0400 | [diff] [blame] | 460 | |
npiggin@suse.de | c08d3b0 | 2009-08-21 02:35:06 +1000 | [diff] [blame] | 461 | truncate_pagecache(inode, oldsize, offset); |
| 462 | out: |
| 463 | return err; |
Trond Myklebust | a3d0145 | 2008-06-11 12:21:19 -0400 | [diff] [blame] | 464 | } |
| 465 | |
| 466 | /** |
Trond Myklebust | 65e4308 | 2005-08-16 11:49:44 -0400 | [diff] [blame] | 467 | * nfs_setattr_update_inode - Update inode metadata after a setattr call. |
| 468 | * @inode: pointer to struct inode |
| 469 | * @attr: pointer to struct iattr |
| 470 | * |
| 471 | * Note: we do this in the *proc.c in order to ensure that |
| 472 | * it works for things like exclusive creates too. |
| 473 | */ |
| 474 | void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr) |
| 475 | { |
| 476 | if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) { |
Trond Myklebust | 2f28ea6 | 2008-10-05 14:26:11 -0400 | [diff] [blame] | 477 | spin_lock(&inode->i_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 478 | if ((attr->ia_valid & ATTR_MODE) != 0) { |
Trond Myklebust | 65e4308 | 2005-08-16 11:49:44 -0400 | [diff] [blame] | 479 | int mode = attr->ia_mode & S_IALLUGO; |
| 480 | mode |= inode->i_mode & ~S_IALLUGO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 481 | inode->i_mode = mode; |
| 482 | } |
| 483 | if ((attr->ia_valid & ATTR_UID) != 0) |
| 484 | inode->i_uid = attr->ia_uid; |
| 485 | if ((attr->ia_valid & ATTR_GID) != 0) |
| 486 | inode->i_gid = attr->ia_gid; |
Chuck Lever | 5529680 | 2005-08-18 11:24:09 -0700 | [diff] [blame] | 487 | 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] | 488 | spin_unlock(&inode->i_lock); |
Trond Myklebust | 65e4308 | 2005-08-16 11:49:44 -0400 | [diff] [blame] | 489 | } |
| 490 | if ((attr->ia_valid & ATTR_SIZE) != 0) { |
Chuck Lever | 91d5b47 | 2006-03-20 13:44:14 -0500 | [diff] [blame] | 491 | nfs_inc_stats(inode, NFSIOS_SETATTRTRUNC); |
Trond Myklebust | a3d0145 | 2008-06-11 12:21:19 -0400 | [diff] [blame] | 492 | nfs_vmtruncate(inode, attr->ia_size); |
Trond Myklebust | 65e4308 | 2005-08-16 11:49:44 -0400 | [diff] [blame] | 493 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 494 | } |
| 495 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 496 | int nfs_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat) |
| 497 | { |
| 498 | struct inode *inode = dentry->d_inode; |
Chuck Lever | 5529680 | 2005-08-18 11:24:09 -0700 | [diff] [blame] | 499 | int need_atime = NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATIME; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 500 | int err; |
| 501 | |
Trond Myklebust | acdc53b | 2010-02-19 17:03:26 -0800 | [diff] [blame] | 502 | /* Flush out writes to the server in order to update c/mtime. */ |
Chuck Lever | 28c494c | 2007-10-26 13:32:13 -0400 | [diff] [blame] | 503 | if (S_ISREG(inode->i_mode)) { |
Trond Myklebust | acdc53b | 2010-02-19 17:03:26 -0800 | [diff] [blame] | 504 | err = filemap_write_and_wait(inode->i_mapping); |
| 505 | if (err) |
| 506 | goto out; |
Chuck Lever | 28c494c | 2007-10-26 13:32:13 -0400 | [diff] [blame] | 507 | } |
Christoph Hellwig | fc33a7b | 2006-01-09 20:52:17 -0800 | [diff] [blame] | 508 | |
| 509 | /* |
| 510 | * We may force a getattr if the user cares about atime. |
| 511 | * |
| 512 | * Note that we only have to check the vfsmount flags here: |
| 513 | * - NFS always sets S_NOATIME by so checking it would give a |
| 514 | * bogus result |
| 515 | * - NFS never sets MS_NOATIME or MS_NODIRATIME so there is |
| 516 | * no point in checking those. |
| 517 | */ |
| 518 | if ((mnt->mnt_flags & MNT_NOATIME) || |
| 519 | ((mnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 520 | need_atime = 0; |
Christoph Hellwig | fc33a7b | 2006-01-09 20:52:17 -0800 | [diff] [blame] | 521 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 522 | if (need_atime) |
| 523 | err = __nfs_revalidate_inode(NFS_SERVER(inode), inode); |
| 524 | else |
| 525 | err = nfs_revalidate_inode(NFS_SERVER(inode), inode); |
Peter Staubach | 4e769b9 | 2007-08-03 15:07:10 -0400 | [diff] [blame] | 526 | if (!err) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 527 | generic_fillattr(inode, stat); |
Trond Myklebust | f43bf0b | 2007-10-09 12:01:04 -0400 | [diff] [blame] | 528 | stat->ino = nfs_compat_user_ino64(NFS_FILEID(inode)); |
Peter Staubach | 4e769b9 | 2007-08-03 15:07:10 -0400 | [diff] [blame] | 529 | } |
Trond Myklebust | acdc53b | 2010-02-19 17:03:26 -0800 | [diff] [blame] | 530 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 531 | return err; |
| 532 | } |
| 533 | |
Trond Myklebust | f11ac8d | 2010-06-25 16:35:53 -0400 | [diff] [blame] | 534 | static void nfs_init_lock_context(struct nfs_lock_context *l_ctx) |
| 535 | { |
| 536 | atomic_set(&l_ctx->count, 1); |
| 537 | l_ctx->lockowner = current->files; |
| 538 | l_ctx->pid = current->tgid; |
| 539 | INIT_LIST_HEAD(&l_ctx->list); |
| 540 | } |
| 541 | |
| 542 | static struct nfs_lock_context *__nfs_find_lock_context(struct nfs_open_context *ctx) |
| 543 | { |
| 544 | struct nfs_lock_context *pos; |
| 545 | |
| 546 | list_for_each_entry(pos, &ctx->lock_context.list, list) { |
| 547 | if (pos->lockowner != current->files) |
| 548 | continue; |
| 549 | if (pos->pid != current->tgid) |
| 550 | continue; |
| 551 | atomic_inc(&pos->count); |
| 552 | return pos; |
| 553 | } |
| 554 | return NULL; |
| 555 | } |
| 556 | |
| 557 | struct nfs_lock_context *nfs_get_lock_context(struct nfs_open_context *ctx) |
| 558 | { |
| 559 | struct nfs_lock_context *res, *new = NULL; |
| 560 | struct inode *inode = ctx->path.dentry->d_inode; |
| 561 | |
| 562 | spin_lock(&inode->i_lock); |
| 563 | res = __nfs_find_lock_context(ctx); |
| 564 | if (res == NULL) { |
| 565 | spin_unlock(&inode->i_lock); |
| 566 | new = kmalloc(sizeof(*new), GFP_KERNEL); |
| 567 | if (new == NULL) |
| 568 | return NULL; |
| 569 | nfs_init_lock_context(new); |
| 570 | spin_lock(&inode->i_lock); |
| 571 | res = __nfs_find_lock_context(ctx); |
| 572 | if (res == NULL) { |
| 573 | list_add_tail(&new->list, &ctx->lock_context.list); |
| 574 | new->open_context = ctx; |
| 575 | res = new; |
| 576 | new = NULL; |
| 577 | } |
| 578 | } |
| 579 | spin_unlock(&inode->i_lock); |
| 580 | kfree(new); |
| 581 | return res; |
| 582 | } |
| 583 | |
| 584 | void nfs_put_lock_context(struct nfs_lock_context *l_ctx) |
| 585 | { |
| 586 | struct nfs_open_context *ctx = l_ctx->open_context; |
| 587 | struct inode *inode = ctx->path.dentry->d_inode; |
| 588 | |
| 589 | if (!atomic_dec_and_lock(&l_ctx->count, &inode->i_lock)) |
| 590 | return; |
| 591 | list_del(&l_ctx->list); |
| 592 | spin_unlock(&inode->i_lock); |
| 593 | kfree(l_ctx); |
| 594 | } |
| 595 | |
Trond Myklebust | 7fe5c39 | 2009-03-19 15:35:50 -0400 | [diff] [blame] | 596 | /** |
| 597 | * nfs_close_context - Common close_context() routine NFSv2/v3 |
| 598 | * @ctx: pointer to context |
| 599 | * @is_sync: is this a synchronous close |
| 600 | * |
| 601 | * always ensure that the attributes are up to date if we're mounted |
| 602 | * with close-to-open semantics |
| 603 | */ |
| 604 | void nfs_close_context(struct nfs_open_context *ctx, int is_sync) |
| 605 | { |
| 606 | struct inode *inode; |
| 607 | struct nfs_server *server; |
| 608 | |
| 609 | if (!(ctx->mode & FMODE_WRITE)) |
| 610 | return; |
| 611 | if (!is_sync) |
| 612 | return; |
| 613 | inode = ctx->path.dentry->d_inode; |
| 614 | if (!list_empty(&NFS_I(inode)->open_files)) |
| 615 | return; |
| 616 | server = NFS_SERVER(inode); |
| 617 | if (server->flags & NFS_MOUNT_NOCTO) |
| 618 | return; |
| 619 | nfs_revalidate_inode(server, inode); |
| 620 | } |
| 621 | |
Trond Myklebust | cd9a1c0 | 2010-09-17 10:56:50 -0400 | [diff] [blame] | 622 | 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] | 623 | { |
| 624 | struct nfs_open_context *ctx; |
| 625 | |
Panagiotis Issaris | f52720c | 2006-09-27 01:49:39 -0700 | [diff] [blame] | 626 | ctx = kmalloc(sizeof(*ctx), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 627 | if (ctx != NULL) { |
Al Viro | 6eae797 | 2010-01-30 13:44:07 -0500 | [diff] [blame] | 628 | ctx->path = *path; |
| 629 | path_get(&ctx->path); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 630 | ctx->cred = get_rpccred(cred); |
| 631 | ctx->state = NULL; |
Trond Myklebust | cd9a1c0 | 2010-09-17 10:56:50 -0400 | [diff] [blame] | 632 | ctx->mode = f_mode; |
Jeff Layton | 66d3aac | 2008-03-31 15:01:58 -0400 | [diff] [blame] | 633 | ctx->flags = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 634 | ctx->error = 0; |
Olivier Galibert | 00a9264 | 2005-06-22 17:16:29 +0000 | [diff] [blame] | 635 | ctx->dir_cookie = 0; |
Trond Myklebust | f11ac8d | 2010-06-25 16:35:53 -0400 | [diff] [blame] | 636 | nfs_init_lock_context(&ctx->lock_context); |
| 637 | ctx->lock_context.open_context = ctx; |
Trond Myklebust | 5c78f58 | 2010-09-27 15:51:20 -0400 | [diff] [blame] | 638 | INIT_LIST_HEAD(&ctx->list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 639 | } |
| 640 | return ctx; |
| 641 | } |
| 642 | |
| 643 | struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx) |
| 644 | { |
| 645 | if (ctx != NULL) |
Trond Myklebust | f11ac8d | 2010-06-25 16:35:53 -0400 | [diff] [blame] | 646 | atomic_inc(&ctx->lock_context.count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 647 | return ctx; |
| 648 | } |
| 649 | |
Trond Myklebust | 7fe5c39 | 2009-03-19 15:35:50 -0400 | [diff] [blame] | 650 | 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] | 651 | { |
Trond Myklebust | 7fe5c39 | 2009-03-19 15:35:50 -0400 | [diff] [blame] | 652 | struct inode *inode = ctx->path.dentry->d_inode; |
Trond Myklebust | 3bec63d | 2007-06-17 16:02:44 -0400 | [diff] [blame] | 653 | |
Trond Myklebust | 5c78f58 | 2010-09-27 15:51:20 -0400 | [diff] [blame] | 654 | if (!list_empty(&ctx->list)) { |
Benny Halevy | ef84303 | 2010-09-23 12:22:09 -0400 | [diff] [blame] | 655 | if (!atomic_dec_and_lock(&ctx->lock_context.count, &inode->i_lock)) |
| 656 | return; |
| 657 | list_del(&ctx->list); |
| 658 | spin_unlock(&inode->i_lock); |
Benny Halevy | ef84303 | 2010-09-23 12:22:09 -0400 | [diff] [blame] | 659 | } else if (!atomic_dec_and_test(&ctx->lock_context.count)) |
Trond Myklebust | 5e11934 | 2007-07-26 12:06:17 -0400 | [diff] [blame] | 660 | return; |
Trond Myklebust | 5c78f58 | 2010-09-27 15:51:20 -0400 | [diff] [blame] | 661 | if (inode != NULL) |
| 662 | NFS_PROTO(inode)->close_context(ctx, is_sync); |
Trond Myklebust | 3bec63d | 2007-06-17 16:02:44 -0400 | [diff] [blame] | 663 | if (ctx->cred != NULL) |
| 664 | put_rpccred(ctx->cred); |
Jan Blunck | 31f31db | 2008-05-02 13:42:45 -0700 | [diff] [blame] | 665 | path_put(&ctx->path); |
Trond Myklebust | 3bec63d | 2007-06-17 16:02:44 -0400 | [diff] [blame] | 666 | kfree(ctx); |
| 667 | } |
| 668 | |
Trond Myklebust | a49c3c7 | 2007-10-18 18:03:27 -0400 | [diff] [blame] | 669 | void put_nfs_open_context(struct nfs_open_context *ctx) |
| 670 | { |
| 671 | __put_nfs_open_context(ctx, 0); |
| 672 | } |
| 673 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 674 | /* |
| 675 | * Ensure that mmap has a recent RPC credential for use when writing out |
| 676 | * shared pages |
| 677 | */ |
Trond Myklebust | cd9a1c0 | 2010-09-17 10:56:50 -0400 | [diff] [blame] | 678 | 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] | 679 | { |
Josef "Jeff" Sipek | 01cce93 | 2006-12-08 02:36:40 -0800 | [diff] [blame] | 680 | struct inode *inode = filp->f_path.dentry->d_inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 681 | struct nfs_inode *nfsi = NFS_I(inode); |
| 682 | |
| 683 | filp->private_data = get_nfs_open_context(ctx); |
| 684 | spin_lock(&inode->i_lock); |
| 685 | list_add(&ctx->list, &nfsi->open_files); |
| 686 | spin_unlock(&inode->i_lock); |
| 687 | } |
| 688 | |
Trond Myklebust | d530838 | 2005-11-04 15:33:38 -0500 | [diff] [blame] | 689 | /* |
| 690 | * Given an inode, search for an open context with the desired characteristics |
| 691 | */ |
Trond Myklebust | dc0b027 | 2008-12-23 15:21:56 -0500 | [diff] [blame] | 692 | 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] | 693 | { |
| 694 | struct nfs_inode *nfsi = NFS_I(inode); |
| 695 | struct nfs_open_context *pos, *ctx = NULL; |
| 696 | |
| 697 | spin_lock(&inode->i_lock); |
| 698 | list_for_each_entry(pos, &nfsi->open_files, list) { |
Trond Myklebust | d530838 | 2005-11-04 15:33:38 -0500 | [diff] [blame] | 699 | if (cred != NULL && pos->cred != cred) |
| 700 | continue; |
Trond Myklebust | 1544fa0 | 2010-03-25 13:54:49 -0400 | [diff] [blame] | 701 | if ((pos->mode & (FMODE_READ|FMODE_WRITE)) != mode) |
| 702 | continue; |
| 703 | ctx = get_nfs_open_context(pos); |
| 704 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 705 | } |
| 706 | spin_unlock(&inode->i_lock); |
| 707 | return ctx; |
| 708 | } |
| 709 | |
Trond Myklebust | b92dccf | 2006-03-20 13:44:03 -0500 | [diff] [blame] | 710 | static void nfs_file_clear_open_context(struct file *filp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 711 | { |
Josef "Jeff" Sipek | 01cce93 | 2006-12-08 02:36:40 -0800 | [diff] [blame] | 712 | struct inode *inode = filp->f_path.dentry->d_inode; |
Trond Myklebust | cd3758e | 2007-08-10 17:44:32 -0400 | [diff] [blame] | 713 | struct nfs_open_context *ctx = nfs_file_open_context(filp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 714 | |
| 715 | if (ctx) { |
| 716 | filp->private_data = NULL; |
| 717 | spin_lock(&inode->i_lock); |
| 718 | list_move_tail(&ctx->list, &NFS_I(inode)->open_files); |
| 719 | spin_unlock(&inode->i_lock); |
Chuck Lever | f895c53 | 2010-02-01 14:17:50 -0500 | [diff] [blame] | 720 | __put_nfs_open_context(ctx, filp->f_flags & O_DIRECT ? 0 : 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 721 | } |
| 722 | } |
| 723 | |
| 724 | /* |
| 725 | * These allocate and release file read/write context information. |
| 726 | */ |
| 727 | int nfs_open(struct inode *inode, struct file *filp) |
| 728 | { |
| 729 | struct nfs_open_context *ctx; |
| 730 | struct rpc_cred *cred; |
| 731 | |
Trond Myklebust | 98a8e32 | 2008-03-12 12:25:28 -0400 | [diff] [blame] | 732 | cred = rpc_lookup_cred(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 733 | if (IS_ERR(cred)) |
| 734 | return PTR_ERR(cred); |
Trond Myklebust | cd9a1c0 | 2010-09-17 10:56:50 -0400 | [diff] [blame] | 735 | ctx = alloc_nfs_open_context(&filp->f_path, cred, filp->f_mode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 736 | put_rpccred(cred); |
| 737 | if (ctx == NULL) |
| 738 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 739 | nfs_file_set_open_context(filp, ctx); |
| 740 | put_nfs_open_context(ctx); |
David Howells | ef79c09 | 2009-04-03 16:42:43 +0100 | [diff] [blame] | 741 | nfs_fscache_set_inode_cookie(inode, filp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 742 | return 0; |
| 743 | } |
| 744 | |
| 745 | int nfs_release(struct inode *inode, struct file *filp) |
| 746 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 747 | nfs_file_clear_open_context(filp); |
| 748 | return 0; |
| 749 | } |
| 750 | |
| 751 | /* |
| 752 | * This function is called whenever some part of NFS notices that |
| 753 | * the cached attributes have to be refreshed. |
| 754 | */ |
| 755 | int |
| 756 | __nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) |
| 757 | { |
| 758 | int status = -ESTALE; |
Trond Myklebust | a3cba2a | 2010-04-16 16:22:49 -0400 | [diff] [blame] | 759 | struct nfs_fattr *fattr = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 760 | struct nfs_inode *nfsi = NFS_I(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 761 | |
| 762 | dfprintk(PAGECACHE, "NFS: revalidating (%s/%Ld)\n", |
| 763 | inode->i_sb->s_id, (long long)NFS_FILEID(inode)); |
| 764 | |
Chuck Lever | 85233a7 | 2006-10-19 23:28:42 -0700 | [diff] [blame] | 765 | if (is_bad_inode(inode)) |
Chuck Lever | 412d582 | 2005-08-18 11:24:11 -0700 | [diff] [blame] | 766 | goto out; |
Trond Myklebust | 7fdc49c | 2007-09-28 19:11:33 -0400 | [diff] [blame] | 767 | if (NFS_STALE(inode)) |
| 768 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 769 | |
Trond Myklebust | a3cba2a | 2010-04-16 16:22:49 -0400 | [diff] [blame] | 770 | status = -ENOMEM; |
| 771 | fattr = nfs_alloc_fattr(); |
| 772 | if (fattr == NULL) |
| 773 | goto out; |
| 774 | |
Trond Myklebust | 691beb1 | 2008-10-05 14:48:22 -0400 | [diff] [blame] | 775 | nfs_inc_stats(inode, NFSIOS_INODEREVALIDATE); |
Trond Myklebust | a3cba2a | 2010-04-16 16:22:49 -0400 | [diff] [blame] | 776 | status = NFS_PROTO(inode)->getattr(server, NFS_FH(inode), fattr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 777 | if (status != 0) { |
| 778 | dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) getattr failed, error=%d\n", |
| 779 | inode->i_sb->s_id, |
| 780 | (long long)NFS_FILEID(inode), status); |
| 781 | if (status == -ESTALE) { |
| 782 | nfs_zap_caches(inode); |
| 783 | if (!S_ISDIR(inode->i_mode)) |
Benny Halevy | 3a10c30 | 2008-01-23 08:58:59 +0200 | [diff] [blame] | 784 | set_bit(NFS_INO_STALE, &NFS_I(inode)->flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 785 | } |
| 786 | goto out; |
| 787 | } |
| 788 | |
Trond Myklebust | a3cba2a | 2010-04-16 16:22:49 -0400 | [diff] [blame] | 789 | status = nfs_refresh_inode(inode, fattr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 790 | if (status) { |
| 791 | dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) refresh failed, error=%d\n", |
| 792 | inode->i_sb->s_id, |
| 793 | (long long)NFS_FILEID(inode), status); |
| 794 | goto out; |
| 795 | } |
Chuck Lever | 5529680 | 2005-08-18 11:24:09 -0700 | [diff] [blame] | 796 | |
Trond Myklebust | 24aa1fe | 2005-12-03 15:20:07 -0500 | [diff] [blame] | 797 | if (nfsi->cache_validity & NFS_INO_INVALID_ACL) |
Trond Myklebust | ada70d9 | 2005-06-22 17:16:22 +0000 | [diff] [blame] | 798 | nfs_zap_acl_cache(inode); |
Chuck Lever | 5529680 | 2005-08-18 11:24:09 -0700 | [diff] [blame] | 799 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 800 | dfprintk(PAGECACHE, "NFS: (%s/%Ld) revalidation complete\n", |
| 801 | inode->i_sb->s_id, |
| 802 | (long long)NFS_FILEID(inode)); |
| 803 | |
Chuck Lever | 412d582 | 2005-08-18 11:24:11 -0700 | [diff] [blame] | 804 | out: |
Trond Myklebust | a3cba2a | 2010-04-16 16:22:49 -0400 | [diff] [blame] | 805 | nfs_free_fattr(fattr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 806 | return status; |
| 807 | } |
| 808 | |
| 809 | int nfs_attribute_timeout(struct inode *inode) |
| 810 | { |
| 811 | struct nfs_inode *nfsi = NFS_I(inode); |
| 812 | |
Trond Myklebust | d7cf8dd | 2010-04-16 16:42:46 -0400 | [diff] [blame] | 813 | return !time_in_range_open(jiffies, nfsi->read_cache_jiffies, nfsi->read_cache_jiffies + nfsi->attrtimeo); |
| 814 | } |
| 815 | |
| 816 | static int nfs_attribute_cache_expired(struct inode *inode) |
| 817 | { |
Trond Myklebust | b4d2314 | 2010-03-10 15:21:44 -0500 | [diff] [blame] | 818 | if (nfs_have_delegated_attributes(inode)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 819 | return 0; |
Trond Myklebust | d7cf8dd | 2010-04-16 16:42:46 -0400 | [diff] [blame] | 820 | return nfs_attribute_timeout(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 821 | } |
| 822 | |
| 823 | /** |
| 824 | * nfs_revalidate_inode - Revalidate the inode attributes |
| 825 | * @server - pointer to nfs_server struct |
| 826 | * @inode - pointer to inode struct |
| 827 | * |
| 828 | * Updates inode attribute information by retrieving the data from the server. |
| 829 | */ |
| 830 | int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) |
| 831 | { |
Trond Myklebust | 44b1187 | 2006-05-25 01:40:59 -0400 | [diff] [blame] | 832 | if (!(NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATTR) |
Trond Myklebust | d7cf8dd | 2010-04-16 16:42:46 -0400 | [diff] [blame] | 833 | && !nfs_attribute_cache_expired(inode)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 834 | return NFS_STALE(inode) ? -ESTALE : 0; |
| 835 | return __nfs_revalidate_inode(server, inode); |
| 836 | } |
| 837 | |
Trond Myklebust | 1cda707 | 2010-02-19 17:03:30 -0800 | [diff] [blame] | 838 | static int nfs_invalidate_mapping(struct inode *inode, struct address_space *mapping) |
Trond Myklebust | 717d44e | 2007-01-24 11:54:55 -0800 | [diff] [blame] | 839 | { |
| 840 | struct nfs_inode *nfsi = NFS_I(inode); |
| 841 | |
| 842 | if (mapping->nrpages != 0) { |
| 843 | int ret = invalidate_inode_pages2(mapping); |
| 844 | if (ret < 0) |
| 845 | return ret; |
| 846 | } |
| 847 | spin_lock(&inode->i_lock); |
| 848 | nfsi->cache_validity &= ~NFS_INO_INVALID_DATA; |
Trond Myklebust | 2f78e43 | 2007-09-30 15:31:19 -0400 | [diff] [blame] | 849 | if (S_ISDIR(inode->i_mode)) |
Trond Myklebust | 717d44e | 2007-01-24 11:54:55 -0800 | [diff] [blame] | 850 | memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf)); |
Trond Myklebust | 717d44e | 2007-01-24 11:54:55 -0800 | [diff] [blame] | 851 | spin_unlock(&inode->i_lock); |
| 852 | nfs_inc_stats(inode, NFSIOS_DATAINVALIDATE); |
David Howells | ef79c09 | 2009-04-03 16:42:43 +0100 | [diff] [blame] | 853 | nfs_fscache_reset_inode_cookie(inode); |
Trond Myklebust | 717d44e | 2007-01-24 11:54:55 -0800 | [diff] [blame] | 854 | dfprintk(PAGECACHE, "NFS: (%s/%Ld) data cache invalidated\n", |
| 855 | inode->i_sb->s_id, (long long)NFS_FILEID(inode)); |
| 856 | return 0; |
| 857 | } |
| 858 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 859 | /** |
Trond Myklebust | 7d52e86 | 2005-06-22 17:16:30 +0000 | [diff] [blame] | 860 | * nfs_revalidate_mapping - Revalidate the pagecache |
| 861 | * @inode - pointer to host inode |
| 862 | * @mapping - pointer to mapping |
| 863 | */ |
Trond Myklebust | 44b1187 | 2006-05-25 01:40:59 -0400 | [diff] [blame] | 864 | int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping) |
Trond Myklebust | 7d52e86 | 2005-06-22 17:16:30 +0000 | [diff] [blame] | 865 | { |
| 866 | struct nfs_inode *nfsi = NFS_I(inode); |
Trond Myklebust | 44b1187 | 2006-05-25 01:40:59 -0400 | [diff] [blame] | 867 | int ret = 0; |
| 868 | |
Trond Myklebust | 44b1187 | 2006-05-25 01:40:59 -0400 | [diff] [blame] | 869 | if ((nfsi->cache_validity & NFS_INO_REVAL_PAGECACHE) |
Trond Myklebust | d7cf8dd | 2010-04-16 16:42:46 -0400 | [diff] [blame] | 870 | || nfs_attribute_cache_expired(inode) |
| 871 | || NFS_STALE(inode)) { |
Trond Myklebust | 44b1187 | 2006-05-25 01:40:59 -0400 | [diff] [blame] | 872 | ret = __nfs_revalidate_inode(NFS_SERVER(inode), inode); |
Trond Myklebust | 717d44e | 2007-01-24 11:54:55 -0800 | [diff] [blame] | 873 | if (ret < 0) |
| 874 | goto out; |
Trond Myklebust | 7d52e86 | 2005-06-22 17:16:30 +0000 | [diff] [blame] | 875 | } |
Trond Myklebust | 717d44e | 2007-01-24 11:54:55 -0800 | [diff] [blame] | 876 | if (nfsi->cache_validity & NFS_INO_INVALID_DATA) |
| 877 | ret = nfs_invalidate_mapping(inode, mapping); |
Trond Myklebust | cd9ae2b | 2006-10-19 23:28:40 -0700 | [diff] [blame] | 878 | out: |
Trond Myklebust | 44b1187 | 2006-05-25 01:40:59 -0400 | [diff] [blame] | 879 | return ret; |
Trond Myklebust | 7d52e86 | 2005-06-22 17:16:30 +0000 | [diff] [blame] | 880 | } |
| 881 | |
Trond Myklebust | a895b4a | 2006-01-03 09:55:40 +0100 | [diff] [blame] | 882 | static void nfs_wcc_update_inode(struct inode *inode, struct nfs_fattr *fattr) |
| 883 | { |
| 884 | struct nfs_inode *nfsi = NFS_I(inode); |
| 885 | |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 886 | if ((fattr->valid & NFS_ATTR_FATTR_PRECHANGE) |
| 887 | && (fattr->valid & NFS_ATTR_FATTR_CHANGE) |
| 888 | && nfsi->change_attr == fattr->pre_change_attr) { |
Trond Myklebust | 70ca885 | 2007-09-30 15:21:24 -0400 | [diff] [blame] | 889 | nfsi->change_attr = fattr->change_attr; |
| 890 | if (S_ISDIR(inode->i_mode)) |
| 891 | nfsi->cache_validity |= NFS_INO_INVALID_DATA; |
| 892 | } |
Trond Myklebust | a895b4a | 2006-01-03 09:55:40 +0100 | [diff] [blame] | 893 | /* If we have atomic WCC data, we may update some attributes */ |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 894 | if ((fattr->valid & NFS_ATTR_FATTR_PRECTIME) |
| 895 | && (fattr->valid & NFS_ATTR_FATTR_CTIME) |
| 896 | && timespec_equal(&inode->i_ctime, &fattr->pre_ctime)) |
Trond Myklebust | a895b4a | 2006-01-03 09:55:40 +0100 | [diff] [blame] | 897 | memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime)); |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 898 | |
| 899 | if ((fattr->valid & NFS_ATTR_FATTR_PREMTIME) |
| 900 | && (fattr->valid & NFS_ATTR_FATTR_MTIME) |
| 901 | && timespec_equal(&inode->i_mtime, &fattr->pre_mtime)) { |
Trond Myklebust | a895b4a | 2006-01-03 09:55:40 +0100 | [diff] [blame] | 902 | memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime)); |
Trond Myklebust | e323ea4 | 2007-09-30 17:03:25 -0400 | [diff] [blame] | 903 | if (S_ISDIR(inode->i_mode)) |
| 904 | nfsi->cache_validity |= NFS_INO_INVALID_DATA; |
Trond Myklebust | a895b4a | 2006-01-03 09:55:40 +0100 | [diff] [blame] | 905 | } |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 906 | if ((fattr->valid & NFS_ATTR_FATTR_PRESIZE) |
| 907 | && (fattr->valid & NFS_ATTR_FATTR_SIZE) |
| 908 | && i_size_read(inode) == nfs_size_to_loff_t(fattr->pre_size) |
| 909 | && nfsi->npages == 0) |
| 910 | i_size_write(inode, nfs_size_to_loff_t(fattr->size)); |
Trond Myklebust | a895b4a | 2006-01-03 09:55:40 +0100 | [diff] [blame] | 911 | } |
| 912 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 913 | /** |
Trond Myklebust | 3380114 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 914 | * nfs_check_inode_attributes - verify consistency of the inode attribute cache |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 915 | * @inode - pointer to inode |
| 916 | * @fattr - updated attributes |
| 917 | * |
| 918 | * Verifies the attribute cache. If we have just changed the attributes, |
| 919 | * so that fattr carries weak cache consistency data, then it may |
| 920 | * also update the ctime/mtime/change_attribute. |
| 921 | */ |
Trond Myklebust | 3380114 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 922 | 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] | 923 | { |
| 924 | struct nfs_inode *nfsi = NFS_I(inode); |
| 925 | loff_t cur_size, new_isize; |
Trond Myklebust | 2a3f5fd | 2007-10-08 14:26:13 -0400 | [diff] [blame] | 926 | unsigned long invalid = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 927 | |
Chuck Lever | dc59250 | 2005-08-18 11:24:12 -0700 | [diff] [blame] | 928 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 929 | /* Has the inode gone and changed behind our back? */ |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 930 | if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 931 | return -EIO; |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 932 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) |
| 933 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 934 | |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 935 | if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 && |
Trond Myklebust | f1bb0b9 | 2006-05-25 01:40:55 -0400 | [diff] [blame] | 936 | nfsi->change_attr != fattr->change_attr) |
Trond Myklebust | 2a3f5fd | 2007-10-08 14:26:13 -0400 | [diff] [blame] | 937 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 938 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 939 | /* Verify a few of the more important attributes */ |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 940 | 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] | 941 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; |
Trond Myklebust | ca62b9c | 2006-03-20 13:44:07 -0500 | [diff] [blame] | 942 | |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 943 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) { |
| 944 | cur_size = i_size_read(inode); |
| 945 | new_isize = nfs_size_to_loff_t(fattr->size); |
| 946 | if (cur_size != new_isize && nfsi->npages == 0) |
| 947 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; |
| 948 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 949 | |
| 950 | /* Have any file permissions changed? */ |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 951 | if ((fattr->valid & NFS_ATTR_FATTR_MODE) && (inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) |
| 952 | invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; |
| 953 | if ((fattr->valid & NFS_ATTR_FATTR_OWNER) && inode->i_uid != fattr->uid) |
| 954 | invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; |
| 955 | if ((fattr->valid & NFS_ATTR_FATTR_GROUP) && inode->i_gid != fattr->gid) |
Trond Myklebust | 2a3f5fd | 2007-10-08 14:26:13 -0400 | [diff] [blame] | 956 | 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] | 957 | |
| 958 | /* Has the link count changed? */ |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 959 | if ((fattr->valid & NFS_ATTR_FATTR_NLINK) && inode->i_nlink != fattr->nlink) |
Trond Myklebust | 2a3f5fd | 2007-10-08 14:26:13 -0400 | [diff] [blame] | 960 | invalid |= NFS_INO_INVALID_ATTR; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 961 | |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 962 | 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] | 963 | invalid |= NFS_INO_INVALID_ATIME; |
| 964 | |
| 965 | if (invalid != 0) |
| 966 | nfsi->cache_validity |= invalid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 967 | |
Trond Myklebust | 3380114 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 968 | nfsi->read_cache_jiffies = fattr->time_start; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 969 | return 0; |
| 970 | } |
| 971 | |
Trond Myklebust | a10ad17 | 2008-09-23 17:28:41 -0400 | [diff] [blame] | 972 | static int nfs_ctime_need_update(const struct inode *inode, const struct nfs_fattr *fattr) |
| 973 | { |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 974 | if (!(fattr->valid & NFS_ATTR_FATTR_CTIME)) |
| 975 | return 0; |
Trond Myklebust | a10ad17 | 2008-09-23 17:28:41 -0400 | [diff] [blame] | 976 | return timespec_compare(&fattr->ctime, &inode->i_ctime) > 0; |
| 977 | } |
| 978 | |
| 979 | static int nfs_size_need_update(const struct inode *inode, const struct nfs_fattr *fattr) |
| 980 | { |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 981 | if (!(fattr->valid & NFS_ATTR_FATTR_SIZE)) |
| 982 | return 0; |
Trond Myklebust | a10ad17 | 2008-09-23 17:28:41 -0400 | [diff] [blame] | 983 | return nfs_size_to_loff_t(fattr->size) > i_size_read(inode); |
| 984 | } |
| 985 | |
Trond Myklebust | ae05f26 | 2008-10-28 15:21:40 -0400 | [diff] [blame] | 986 | static atomic_long_t nfs_attr_generation_counter; |
Trond Myklebust | 4704f0e | 2008-10-14 19:16:07 -0400 | [diff] [blame] | 987 | |
| 988 | static unsigned long nfs_read_attr_generation_counter(void) |
| 989 | { |
Trond Myklebust | ae05f26 | 2008-10-28 15:21:40 -0400 | [diff] [blame] | 990 | return atomic_long_read(&nfs_attr_generation_counter); |
Trond Myklebust | 4704f0e | 2008-10-14 19:16:07 -0400 | [diff] [blame] | 991 | } |
| 992 | |
| 993 | unsigned long nfs_inc_attr_generation_counter(void) |
| 994 | { |
Trond Myklebust | ae05f26 | 2008-10-28 15:21:40 -0400 | [diff] [blame] | 995 | return atomic_long_inc_return(&nfs_attr_generation_counter); |
Trond Myklebust | 4704f0e | 2008-10-14 19:16:07 -0400 | [diff] [blame] | 996 | } |
| 997 | |
| 998 | void nfs_fattr_init(struct nfs_fattr *fattr) |
| 999 | { |
| 1000 | fattr->valid = 0; |
| 1001 | fattr->time_start = jiffies; |
| 1002 | fattr->gencount = nfs_inc_attr_generation_counter(); |
| 1003 | } |
| 1004 | |
Trond Myklebust | 2d36bfd | 2010-04-16 16:22:45 -0400 | [diff] [blame] | 1005 | struct nfs_fattr *nfs_alloc_fattr(void) |
| 1006 | { |
| 1007 | struct nfs_fattr *fattr; |
| 1008 | |
| 1009 | fattr = kmalloc(sizeof(*fattr), GFP_NOFS); |
| 1010 | if (fattr != NULL) |
| 1011 | nfs_fattr_init(fattr); |
| 1012 | return fattr; |
| 1013 | } |
| 1014 | |
| 1015 | struct nfs_fh *nfs_alloc_fhandle(void) |
| 1016 | { |
| 1017 | struct nfs_fh *fh; |
| 1018 | |
| 1019 | fh = kmalloc(sizeof(struct nfs_fh), GFP_NOFS); |
| 1020 | if (fh != NULL) |
| 1021 | fh->size = 0; |
| 1022 | return fh; |
| 1023 | } |
| 1024 | |
Trond Myklebust | a10ad17 | 2008-09-23 17:28:41 -0400 | [diff] [blame] | 1025 | /** |
| 1026 | * nfs_inode_attrs_need_update - check if the inode attributes need updating |
| 1027 | * @inode - pointer to inode |
| 1028 | * @fattr - attributes |
| 1029 | * |
| 1030 | * Attempt to divine whether or not an RPC call reply carrying stale |
| 1031 | * attributes got scheduled after another call carrying updated ones. |
| 1032 | * |
| 1033 | * To do so, the function first assumes that a more recent ctime means |
| 1034 | * that the attributes in fattr are newer, however it also attempt to |
| 1035 | * catch the case where ctime either didn't change, or went backwards |
| 1036 | * (if someone reset the clock on the server) by looking at whether |
| 1037 | * 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] | 1038 | * Note also the check for wraparound of 'attr_gencount' |
Trond Myklebust | a10ad17 | 2008-09-23 17:28:41 -0400 | [diff] [blame] | 1039 | * |
| 1040 | * The function returns 'true' if it thinks the attributes in 'fattr' are |
| 1041 | * more recent than the ones cached in the inode. |
| 1042 | * |
| 1043 | */ |
| 1044 | static int nfs_inode_attrs_need_update(const struct inode *inode, const struct nfs_fattr *fattr) |
| 1045 | { |
| 1046 | const struct nfs_inode *nfsi = NFS_I(inode); |
| 1047 | |
Trond Myklebust | 4704f0e | 2008-10-14 19:16:07 -0400 | [diff] [blame] | 1048 | return ((long)fattr->gencount - (long)nfsi->attr_gencount) > 0 || |
Trond Myklebust | 03254e6 | 2008-10-09 13:27:55 -0400 | [diff] [blame] | 1049 | nfs_ctime_need_update(inode, fattr) || |
| 1050 | nfs_size_need_update(inode, fattr) || |
Trond Myklebust | 4704f0e | 2008-10-14 19:16:07 -0400 | [diff] [blame] | 1051 | ((long)nfsi->attr_gencount - (long)nfs_read_attr_generation_counter() > 0); |
Trond Myklebust | a10ad17 | 2008-09-23 17:28:41 -0400 | [diff] [blame] | 1052 | } |
| 1053 | |
Trond Myklebust | 870a5be | 2008-10-05 12:07:23 -0400 | [diff] [blame] | 1054 | static int nfs_refresh_inode_locked(struct inode *inode, struct nfs_fattr *fattr) |
| 1055 | { |
Trond Myklebust | a10ad17 | 2008-09-23 17:28:41 -0400 | [diff] [blame] | 1056 | if (nfs_inode_attrs_need_update(inode, fattr)) |
Trond Myklebust | 870a5be | 2008-10-05 12:07:23 -0400 | [diff] [blame] | 1057 | return nfs_update_inode(inode, fattr); |
| 1058 | return nfs_check_inode_attributes(inode, fattr); |
| 1059 | } |
| 1060 | |
Trond Myklebust | 3380114 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 1061 | /** |
| 1062 | * nfs_refresh_inode - try to update the inode attribute cache |
| 1063 | * @inode - pointer to inode |
| 1064 | * @fattr - updated attributes |
| 1065 | * |
| 1066 | * Check that an RPC call that returned attributes has not overlapped with |
| 1067 | * other recent updates of the inode metadata, then decide whether it is |
| 1068 | * safe to do a full update of the inode attributes, or whether just to |
| 1069 | * call nfs_check_inode_attributes. |
| 1070 | */ |
| 1071 | int nfs_refresh_inode(struct inode *inode, struct nfs_fattr *fattr) |
| 1072 | { |
Trond Myklebust | 3380114 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 1073 | int status; |
| 1074 | |
| 1075 | if ((fattr->valid & NFS_ATTR_FATTR) == 0) |
| 1076 | return 0; |
| 1077 | spin_lock(&inode->i_lock); |
Trond Myklebust | 870a5be | 2008-10-05 12:07:23 -0400 | [diff] [blame] | 1078 | status = nfs_refresh_inode_locked(inode, fattr); |
Trond Myklebust | 3380114 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 1079 | spin_unlock(&inode->i_lock); |
David Howells | ef79c09 | 2009-04-03 16:42:43 +0100 | [diff] [blame] | 1080 | |
Trond Myklebust | 3380114 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 1081 | return status; |
| 1082 | } |
| 1083 | |
Trond Myklebust | d65f557 | 2008-10-05 12:27:55 -0400 | [diff] [blame] | 1084 | static int nfs_post_op_update_inode_locked(struct inode *inode, struct nfs_fattr *fattr) |
| 1085 | { |
| 1086 | struct nfs_inode *nfsi = NFS_I(inode); |
| 1087 | |
| 1088 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; |
| 1089 | if (S_ISDIR(inode->i_mode)) |
| 1090 | nfsi->cache_validity |= NFS_INO_INVALID_DATA; |
| 1091 | if ((fattr->valid & NFS_ATTR_FATTR) == 0) |
| 1092 | return 0; |
| 1093 | return nfs_refresh_inode_locked(inode, fattr); |
| 1094 | } |
| 1095 | |
Trond Myklebust | decf491 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 1096 | /** |
| 1097 | * nfs_post_op_update_inode - try to update the inode attribute cache |
| 1098 | * @inode - pointer to inode |
| 1099 | * @fattr - updated attributes |
| 1100 | * |
| 1101 | * After an operation that has changed the inode metadata, mark the |
| 1102 | * attribute cache as being invalid, then try to update it. |
Chuck Lever | f551e44 | 2006-09-20 14:33:04 -0400 | [diff] [blame] | 1103 | * |
| 1104 | * NB: if the server didn't return any post op attributes, this |
| 1105 | * function will force the retrieval of attributes before the next |
| 1106 | * NFS request. Thus it should be used only for operations that |
| 1107 | * are expected to change one or more attributes, to avoid |
| 1108 | * unnecessary NFS requests and trips through nfs_update_inode(). |
Trond Myklebust | decf491 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 1109 | */ |
| 1110 | int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr) |
| 1111 | { |
Trond Myklebust | d65f557 | 2008-10-05 12:27:55 -0400 | [diff] [blame] | 1112 | int status; |
Trond Myklebust | decf491 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 1113 | |
Trond Myklebust | 7668fdb | 2007-10-01 09:59:15 -0400 | [diff] [blame] | 1114 | spin_lock(&inode->i_lock); |
Trond Myklebust | d65f557 | 2008-10-05 12:27:55 -0400 | [diff] [blame] | 1115 | status = nfs_post_op_update_inode_locked(inode, fattr); |
Trond Myklebust | 7668fdb | 2007-10-01 09:59:15 -0400 | [diff] [blame] | 1116 | spin_unlock(&inode->i_lock); |
Trond Myklebust | 870a5be | 2008-10-05 12:07:23 -0400 | [diff] [blame] | 1117 | return status; |
Trond Myklebust | decf491 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 1118 | } |
| 1119 | |
Trond Myklebust | 70ca885 | 2007-09-30 15:21:24 -0400 | [diff] [blame] | 1120 | /** |
| 1121 | * nfs_post_op_update_inode_force_wcc - try to update the inode attribute cache |
| 1122 | * @inode - pointer to inode |
| 1123 | * @fattr - updated attributes |
| 1124 | * |
| 1125 | * After an operation that has changed the inode metadata, mark the |
| 1126 | * attribute cache as being invalid, then try to update it. Fake up |
| 1127 | * weak cache consistency data, if none exist. |
| 1128 | * |
| 1129 | * This function is mainly designed to be used by the ->write_done() functions. |
| 1130 | */ |
| 1131 | int nfs_post_op_update_inode_force_wcc(struct inode *inode, struct nfs_fattr *fattr) |
| 1132 | { |
Trond Myklebust | d65f557 | 2008-10-05 12:27:55 -0400 | [diff] [blame] | 1133 | int status; |
| 1134 | |
| 1135 | spin_lock(&inode->i_lock); |
| 1136 | /* Don't do a WCC update if these attributes are already stale */ |
| 1137 | if ((fattr->valid & NFS_ATTR_FATTR) == 0 || |
| 1138 | !nfs_inode_attrs_need_update(inode, fattr)) { |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1139 | fattr->valid &= ~(NFS_ATTR_FATTR_PRECHANGE |
| 1140 | | NFS_ATTR_FATTR_PRESIZE |
| 1141 | | NFS_ATTR_FATTR_PREMTIME |
| 1142 | | NFS_ATTR_FATTR_PRECTIME); |
Trond Myklebust | d65f557 | 2008-10-05 12:27:55 -0400 | [diff] [blame] | 1143 | goto out_noforce; |
| 1144 | } |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1145 | if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 && |
| 1146 | (fattr->valid & NFS_ATTR_FATTR_PRECHANGE) == 0) { |
Trond Myklebust | 70ca885 | 2007-09-30 15:21:24 -0400 | [diff] [blame] | 1147 | fattr->pre_change_attr = NFS_I(inode)->change_attr; |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1148 | fattr->valid |= NFS_ATTR_FATTR_PRECHANGE; |
Trond Myklebust | 70ca885 | 2007-09-30 15:21:24 -0400 | [diff] [blame] | 1149 | } |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1150 | if ((fattr->valid & NFS_ATTR_FATTR_CTIME) != 0 && |
| 1151 | (fattr->valid & NFS_ATTR_FATTR_PRECTIME) == 0) { |
Trond Myklebust | 70ca885 | 2007-09-30 15:21:24 -0400 | [diff] [blame] | 1152 | memcpy(&fattr->pre_ctime, &inode->i_ctime, sizeof(fattr->pre_ctime)); |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1153 | fattr->valid |= NFS_ATTR_FATTR_PRECTIME; |
| 1154 | } |
| 1155 | if ((fattr->valid & NFS_ATTR_FATTR_MTIME) != 0 && |
| 1156 | (fattr->valid & NFS_ATTR_FATTR_PREMTIME) == 0) { |
Trond Myklebust | 70ca885 | 2007-09-30 15:21:24 -0400 | [diff] [blame] | 1157 | memcpy(&fattr->pre_mtime, &inode->i_mtime, sizeof(fattr->pre_mtime)); |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1158 | fattr->valid |= NFS_ATTR_FATTR_PREMTIME; |
| 1159 | } |
| 1160 | if ((fattr->valid & NFS_ATTR_FATTR_SIZE) != 0 && |
| 1161 | (fattr->valid & NFS_ATTR_FATTR_PRESIZE) == 0) { |
Trond Myklebust | a3d0145 | 2008-06-11 12:21:19 -0400 | [diff] [blame] | 1162 | fattr->pre_size = i_size_read(inode); |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1163 | fattr->valid |= NFS_ATTR_FATTR_PRESIZE; |
Trond Myklebust | 70ca885 | 2007-09-30 15:21:24 -0400 | [diff] [blame] | 1164 | } |
Trond Myklebust | d65f557 | 2008-10-05 12:27:55 -0400 | [diff] [blame] | 1165 | out_noforce: |
| 1166 | status = nfs_post_op_update_inode_locked(inode, fattr); |
| 1167 | spin_unlock(&inode->i_lock); |
| 1168 | return status; |
Trond Myklebust | 70ca885 | 2007-09-30 15:21:24 -0400 | [diff] [blame] | 1169 | } |
| 1170 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1171 | /* |
| 1172 | * Many nfs protocol calls return the new file attributes after |
| 1173 | * an operation. Here we update the inode to reflect the state |
| 1174 | * of the server's inode. |
| 1175 | * |
| 1176 | * This is a bit tricky because we have to make sure all dirty pages |
| 1177 | * have been sent off to the server before calling invalidate_inode_pages. |
| 1178 | * To make sure no other process adds more write requests while we try |
| 1179 | * our best to flush them, we make them sleep during the attribute refresh. |
| 1180 | * |
| 1181 | * A very similar scenario holds for the dir cache. |
| 1182 | */ |
Trond Myklebust | 24aa1fe | 2005-12-03 15:20:07 -0500 | [diff] [blame] | 1183 | static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1184 | { |
Trond Myklebust | 8b4bdcf | 2006-06-09 09:34:19 -0400 | [diff] [blame] | 1185 | struct nfs_server *server; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1186 | struct nfs_inode *nfsi = NFS_I(inode); |
Trond Myklebust | 951a143 | 2005-06-22 17:16:30 +0000 | [diff] [blame] | 1187 | loff_t cur_isize, new_isize; |
Trond Myklebust | 2a3f5fd | 2007-10-08 14:26:13 -0400 | [diff] [blame] | 1188 | unsigned long invalid = 0; |
Trond Myklebust | 3e7d950 | 2007-02-05 14:26:28 -0800 | [diff] [blame] | 1189 | unsigned long now = jiffies; |
Trond Myklebust | 62ab460 | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 1190 | unsigned long save_cache_validity; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1191 | |
| 1192 | dfprintk(VFS, "NFS: %s(%s/%ld ct=%d info=0x%x)\n", |
Harvey Harrison | 3110ff8 | 2008-05-02 13:42:44 -0700 | [diff] [blame] | 1193 | __func__, inode->i_sb->s_id, inode->i_ino, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1194 | atomic_read(&inode->i_count), fattr->valid); |
| 1195 | |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1196 | if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid) |
Chuck Lever | 325cfed | 2005-11-30 18:08:55 -0500 | [diff] [blame] | 1197 | goto out_fileid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1198 | |
| 1199 | /* |
| 1200 | * Make sure the inode's type hasn't changed. |
| 1201 | */ |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1202 | 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] | 1203 | goto out_changed; |
| 1204 | |
Trond Myklebust | 8b4bdcf | 2006-06-09 09:34:19 -0400 | [diff] [blame] | 1205 | server = NFS_SERVER(inode); |
Trond Myklebust | a035686 | 2007-06-05 13:26:15 -0400 | [diff] [blame] | 1206 | /* Update the fsid? */ |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1207 | if (S_ISDIR(inode->i_mode) && (fattr->valid & NFS_ATTR_FATTR_FSID) && |
Trond Myklebust | c37dcd33 | 2008-03-06 12:34:50 -0500 | [diff] [blame] | 1208 | !nfs_fsid_equal(&server->fsid, &fattr->fsid) && |
| 1209 | !test_bit(NFS_INO_MOUNTPOINT, &nfsi->flags)) |
Trond Myklebust | 8b4bdcf | 2006-06-09 09:34:19 -0400 | [diff] [blame] | 1210 | server->fsid = fattr->fsid; |
| 1211 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1212 | /* |
| 1213 | * Update the read time so we don't revalidate too often. |
| 1214 | */ |
Trond Myklebust | 3380114 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 1215 | nfsi->read_cache_jiffies = fattr->time_start; |
Trond Myklebust | 3e7d950 | 2007-02-05 14:26:28 -0800 | [diff] [blame] | 1216 | |
Trond Myklebust | 62ab460 | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 1217 | save_cache_validity = nfsi->cache_validity; |
| 1218 | nfsi->cache_validity &= ~(NFS_INO_INVALID_ATTR |
| 1219 | | NFS_INO_INVALID_ATIME |
| 1220 | | NFS_INO_REVAL_FORCED |
| 1221 | | NFS_INO_REVAL_PAGECACHE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1222 | |
Trond Myklebust | a895b4a | 2006-01-03 09:55:40 +0100 | [diff] [blame] | 1223 | /* Do atomic weak cache consistency updates */ |
| 1224 | nfs_wcc_update_inode(inode, fattr); |
| 1225 | |
Trond Myklebust | 47aabaa | 2007-09-27 15:57:24 -0400 | [diff] [blame] | 1226 | /* More cache consistency checks */ |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1227 | if (fattr->valid & NFS_ATTR_FATTR_CHANGE) { |
| 1228 | if (nfsi->change_attr != fattr->change_attr) { |
| 1229 | dprintk("NFS: change_attr change on server for file %s/%ld\n", |
| 1230 | inode->i_sb->s_id, inode->i_ino); |
| 1231 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
| 1232 | if (S_ISDIR(inode->i_mode)) |
| 1233 | nfs_force_lookup_revalidate(inode); |
| 1234 | nfsi->change_attr = fattr->change_attr; |
| 1235 | } |
Trond Myklebust | 62ab460 | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 1236 | } else if (server->caps & NFS_CAP_CHANGE_ATTR) |
| 1237 | invalid |= save_cache_validity; |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1238 | |
| 1239 | if (fattr->valid & NFS_ATTR_FATTR_MTIME) { |
Trond Myklebust | 47aabaa | 2007-09-27 15:57:24 -0400 | [diff] [blame] | 1240 | /* NFSv2/v3: Check if the mtime agrees */ |
| 1241 | if (!timespec_equal(&inode->i_mtime, &fattr->mtime)) { |
| 1242 | dprintk("NFS: mtime change on server for file %s/%ld\n", |
| 1243 | inode->i_sb->s_id, inode->i_ino); |
| 1244 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA; |
Trond Myklebust | bfc69a4 | 2007-10-15 18:18:29 -0400 | [diff] [blame] | 1245 | if (S_ISDIR(inode->i_mode)) |
| 1246 | nfs_force_lookup_revalidate(inode); |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1247 | memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime)); |
Trond Myklebust | 47aabaa | 2007-09-27 15:57:24 -0400 | [diff] [blame] | 1248 | } |
Trond Myklebust | 62ab460 | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 1249 | } else if (server->caps & NFS_CAP_MTIME) |
| 1250 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR |
| 1251 | | NFS_INO_INVALID_DATA |
| 1252 | | NFS_INO_REVAL_PAGECACHE |
| 1253 | | NFS_INO_REVAL_FORCED); |
| 1254 | |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1255 | if (fattr->valid & NFS_ATTR_FATTR_CTIME) { |
Trond Myklebust | 47aabaa | 2007-09-27 15:57:24 -0400 | [diff] [blame] | 1256 | /* If ctime has changed we should definitely clear access+acl caches */ |
NeilBrown | 37d9d76 | 2009-03-11 14:10:23 -0400 | [diff] [blame] | 1257 | if (!timespec_equal(&inode->i_ctime, &fattr->ctime)) { |
Trond Myklebust | 4704f0e | 2008-10-14 19:16:07 -0400 | [diff] [blame] | 1258 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
NeilBrown | 37d9d76 | 2009-03-11 14:10:23 -0400 | [diff] [blame] | 1259 | /* and probably clear data for a directory too as utimes can cause |
| 1260 | * havoc with our cache. |
| 1261 | */ |
| 1262 | if (S_ISDIR(inode->i_mode)) { |
| 1263 | invalid |= NFS_INO_INVALID_DATA; |
| 1264 | nfs_force_lookup_revalidate(inode); |
| 1265 | } |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1266 | memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime)); |
NeilBrown | 37d9d76 | 2009-03-11 14:10:23 -0400 | [diff] [blame] | 1267 | } |
Trond Myklebust | 62ab460 | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 1268 | } else if (server->caps & NFS_CAP_CTIME) |
| 1269 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR |
| 1270 | | NFS_INO_INVALID_ACCESS |
| 1271 | | NFS_INO_INVALID_ACL |
| 1272 | | NFS_INO_REVAL_FORCED); |
Trond Myklebust | 47aabaa | 2007-09-27 15:57:24 -0400 | [diff] [blame] | 1273 | |
Trond Myklebust | 951a143 | 2005-06-22 17:16:30 +0000 | [diff] [blame] | 1274 | /* Check if our cached file size is stale */ |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1275 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) { |
| 1276 | new_isize = nfs_size_to_loff_t(fattr->size); |
| 1277 | cur_isize = i_size_read(inode); |
| 1278 | if (new_isize != cur_isize) { |
| 1279 | /* Do we perhaps have any outstanding writes, or has |
| 1280 | * the file grown beyond our last write? */ |
| 1281 | if (nfsi->npages == 0 || new_isize > cur_isize) { |
| 1282 | i_size_write(inode, new_isize); |
| 1283 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA; |
| 1284 | } |
| 1285 | dprintk("NFS: isize change on server for file %s/%ld\n", |
| 1286 | inode->i_sb->s_id, inode->i_ino); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1287 | } |
Trond Myklebust | 62ab460 | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 1288 | } else |
| 1289 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR |
| 1290 | | NFS_INO_REVAL_PAGECACHE |
| 1291 | | NFS_INO_REVAL_FORCED); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1292 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1293 | |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1294 | if (fattr->valid & NFS_ATTR_FATTR_ATIME) |
| 1295 | memcpy(&inode->i_atime, &fattr->atime, sizeof(inode->i_atime)); |
Trond Myklebust | 62ab460 | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 1296 | else if (server->caps & NFS_CAP_ATIME) |
| 1297 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATIME |
| 1298 | | NFS_INO_REVAL_FORCED); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1299 | |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1300 | if (fattr->valid & NFS_ATTR_FATTR_MODE) { |
| 1301 | if ((inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) { |
Trond Myklebust | 9b4b351 | 2010-02-03 08:27:35 -0500 | [diff] [blame] | 1302 | umode_t newmode = inode->i_mode & S_IFMT; |
| 1303 | newmode |= fattr->mode & S_IALLUGO; |
| 1304 | inode->i_mode = newmode; |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1305 | 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] | 1306 | } |
Trond Myklebust | 62ab460 | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 1307 | } else if (server->caps & NFS_CAP_MODE) |
| 1308 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR |
| 1309 | | NFS_INO_INVALID_ACCESS |
| 1310 | | NFS_INO_INVALID_ACL |
| 1311 | | NFS_INO_REVAL_FORCED); |
| 1312 | |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1313 | if (fattr->valid & NFS_ATTR_FATTR_OWNER) { |
| 1314 | if (inode->i_uid != fattr->uid) { |
| 1315 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
| 1316 | inode->i_uid = fattr->uid; |
| 1317 | } |
Trond Myklebust | 62ab460 | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 1318 | } else if (server->caps & NFS_CAP_OWNER) |
| 1319 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR |
| 1320 | | NFS_INO_INVALID_ACCESS |
| 1321 | | NFS_INO_INVALID_ACL |
| 1322 | | NFS_INO_REVAL_FORCED); |
| 1323 | |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1324 | if (fattr->valid & NFS_ATTR_FATTR_GROUP) { |
| 1325 | if (inode->i_gid != fattr->gid) { |
| 1326 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
| 1327 | inode->i_gid = fattr->gid; |
| 1328 | } |
Trond Myklebust | 62ab460 | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 1329 | } else if (server->caps & NFS_CAP_OWNER_GROUP) |
| 1330 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR |
| 1331 | | NFS_INO_INVALID_ACCESS |
| 1332 | | NFS_INO_INVALID_ACL |
| 1333 | | NFS_INO_REVAL_FORCED); |
Trond Myklebust | 921615f | 2008-10-14 19:23:07 -0400 | [diff] [blame] | 1334 | |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1335 | if (fattr->valid & NFS_ATTR_FATTR_NLINK) { |
| 1336 | if (inode->i_nlink != fattr->nlink) { |
| 1337 | invalid |= NFS_INO_INVALID_ATTR; |
| 1338 | if (S_ISDIR(inode->i_mode)) |
| 1339 | invalid |= NFS_INO_INVALID_DATA; |
| 1340 | inode->i_nlink = fattr->nlink; |
| 1341 | } |
Trond Myklebust | 62ab460 | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 1342 | } else if (server->caps & NFS_CAP_NLINK) |
| 1343 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR |
| 1344 | | NFS_INO_REVAL_FORCED); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1345 | |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1346 | if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1347 | /* |
| 1348 | * report the blocks in 512byte units |
| 1349 | */ |
| 1350 | inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1351 | } |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1352 | if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED) |
| 1353 | inode->i_blocks = fattr->du.nfs2.blocks; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1354 | |
| 1355 | /* Update attrtimeo value if we're out of the unstable period */ |
| 1356 | if (invalid & NFS_INO_INVALID_ATTR) { |
Chuck Lever | 91d5b47 | 2006-03-20 13:44:14 -0500 | [diff] [blame] | 1357 | nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1358 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); |
Trond Myklebust | 3e7d950 | 2007-02-05 14:26:28 -0800 | [diff] [blame] | 1359 | nfsi->attrtimeo_timestamp = now; |
Trond Myklebust | 4704f0e | 2008-10-14 19:16:07 -0400 | [diff] [blame] | 1360 | nfsi->attr_gencount = nfs_inc_attr_generation_counter(); |
Trond Myklebust | 6d2b296 | 2007-10-01 18:57:50 -0400 | [diff] [blame] | 1361 | } else { |
Peter Staubach | 64672d5 | 2008-12-23 15:21:56 -0500 | [diff] [blame] | 1362 | 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] | 1363 | if ((nfsi->attrtimeo <<= 1) > NFS_MAXATTRTIMEO(inode)) |
| 1364 | nfsi->attrtimeo = NFS_MAXATTRTIMEO(inode); |
| 1365 | nfsi->attrtimeo_timestamp = now; |
| 1366 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1367 | } |
Trond Myklebust | f2115dc | 2007-08-15 12:49:17 -0400 | [diff] [blame] | 1368 | invalid &= ~NFS_INO_INVALID_ATTR; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1369 | /* Don't invalidate the data if we were to blame */ |
| 1370 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) |
| 1371 | || S_ISLNK(inode->i_mode))) |
| 1372 | invalid &= ~NFS_INO_INVALID_DATA; |
Trond Myklebust | 412c77c | 2007-07-03 16:10:55 -0400 | [diff] [blame] | 1373 | if (!nfs_have_delegation(inode, FMODE_READ) || |
Trond Myklebust | 62ab460 | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 1374 | (save_cache_validity & NFS_INO_REVAL_FORCED)) |
Chuck Lever | 5529680 | 2005-08-18 11:24:09 -0700 | [diff] [blame] | 1375 | nfsi->cache_validity |= invalid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1376 | |
| 1377 | return 0; |
| 1378 | out_changed: |
| 1379 | /* |
| 1380 | * Big trouble! The inode has become a different object. |
| 1381 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1382 | printk(KERN_DEBUG "%s: inode %ld mode changed, %07o to %07o\n", |
Harvey Harrison | 3110ff8 | 2008-05-02 13:42:44 -0700 | [diff] [blame] | 1383 | __func__, inode->i_ino, inode->i_mode, fattr->mode); |
Trond Myklebust | b37b03b | 2005-11-25 17:10:06 -0500 | [diff] [blame] | 1384 | out_err: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1385 | /* |
| 1386 | * No need to worry about unhashing the dentry, as the |
| 1387 | * lookup validation will know that the inode is bad. |
| 1388 | * (But we fall through to invalidate the caches.) |
| 1389 | */ |
| 1390 | nfs_invalidate_inode(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1391 | return -ESTALE; |
Chuck Lever | 325cfed | 2005-11-30 18:08:55 -0500 | [diff] [blame] | 1392 | |
| 1393 | out_fileid: |
| 1394 | printk(KERN_ERR "NFS: server %s error: fileid changed\n" |
| 1395 | "fsid %s: expected fileid 0x%Lx, got 0x%Lx\n", |
David Howells | 54ceac4 | 2006-08-22 20:06:13 -0400 | [diff] [blame] | 1396 | NFS_SERVER(inode)->nfs_client->cl_hostname, inode->i_sb->s_id, |
Chuck Lever | 325cfed | 2005-11-30 18:08:55 -0500 | [diff] [blame] | 1397 | (long long)nfsi->fileid, (long long)fattr->fileid); |
| 1398 | goto out_err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1399 | } |
| 1400 | |
Trond Myklebust | 55a9759 | 2006-06-09 09:34:19 -0400 | [diff] [blame] | 1401 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1402 | #ifdef CONFIG_NFS_V4 |
| 1403 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1404 | /* |
| 1405 | * Clean out any remaining NFSv4 state that might be left over due |
| 1406 | * to open() calls that passed nfs_atomic_lookup, but failed to call |
| 1407 | * nfs_open(). |
| 1408 | */ |
Al Viro | b57922d | 2010-06-07 14:34:48 -0400 | [diff] [blame] | 1409 | void nfs4_evict_inode(struct inode *inode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1410 | { |
Al Viro | b57922d | 2010-06-07 14:34:48 -0400 | [diff] [blame] | 1411 | truncate_inode_pages(&inode->i_data, 0); |
| 1412 | end_writeback(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1413 | /* If we are holding a delegation, return it! */ |
Trond Myklebust | e6f8107 | 2008-01-24 18:14:34 -0500 | [diff] [blame] | 1414 | nfs_inode_return_delegation_noreclaim(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1415 | /* First call standard NFS clear_inode() code */ |
| 1416 | nfs_clear_inode(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1417 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1418 | #endif |
| 1419 | |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 1420 | struct inode *nfs_alloc_inode(struct super_block *sb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1421 | { |
| 1422 | struct nfs_inode *nfsi; |
Christoph Lameter | e94b176 | 2006-12-06 20:33:17 -0800 | [diff] [blame] | 1423 | nfsi = (struct nfs_inode *)kmem_cache_alloc(nfs_inode_cachep, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1424 | if (!nfsi) |
| 1425 | return NULL; |
Chuck Lever | 5529680 | 2005-08-18 11:24:09 -0700 | [diff] [blame] | 1426 | nfsi->flags = 0UL; |
| 1427 | nfsi->cache_validity = 0UL; |
Trond Myklebust | 458818e | 2005-06-22 17:16:27 +0000 | [diff] [blame] | 1428 | #ifdef CONFIG_NFS_V3_ACL |
| 1429 | nfsi->acl_access = ERR_PTR(-EAGAIN); |
| 1430 | nfsi->acl_default = ERR_PTR(-EAGAIN); |
| 1431 | #endif |
J. Bruce Fields | e50a1c2 | 2005-06-22 17:16:23 +0000 | [diff] [blame] | 1432 | #ifdef CONFIG_NFS_V4 |
| 1433 | nfsi->nfs4_acl = NULL; |
| 1434 | #endif /* CONFIG_NFS_V4 */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1435 | return &nfsi->vfs_inode; |
| 1436 | } |
| 1437 | |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 1438 | void nfs_destroy_inode(struct inode *inode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1439 | { |
| 1440 | kmem_cache_free(nfs_inode_cachep, NFS_I(inode)); |
| 1441 | } |
| 1442 | |
Andrew Morton | d75d541 | 2006-06-25 02:41:26 -0700 | [diff] [blame] | 1443 | static inline void nfs4_init_once(struct nfs_inode *nfsi) |
| 1444 | { |
| 1445 | #ifdef CONFIG_NFS_V4 |
| 1446 | INIT_LIST_HEAD(&nfsi->open_states); |
| 1447 | nfsi->delegation = NULL; |
| 1448 | nfsi->delegation_state = 0; |
| 1449 | init_rwsem(&nfsi->rwsem); |
| 1450 | #endif |
| 1451 | } |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 1452 | |
Alexey Dobriyan | 51cc506 | 2008-07-25 19:45:34 -0700 | [diff] [blame] | 1453 | static void init_once(void *foo) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1454 | { |
| 1455 | struct nfs_inode *nfsi = (struct nfs_inode *) foo; |
| 1456 | |
Christoph Lameter | a35afb8 | 2007-05-16 22:10:57 -0700 | [diff] [blame] | 1457 | inode_init_once(&nfsi->vfs_inode); |
Christoph Lameter | a35afb8 | 2007-05-16 22:10:57 -0700 | [diff] [blame] | 1458 | INIT_LIST_HEAD(&nfsi->open_files); |
| 1459 | INIT_LIST_HEAD(&nfsi->access_cache_entry_lru); |
| 1460 | INIT_LIST_HEAD(&nfsi->access_cache_inode_lru); |
| 1461 | INIT_RADIX_TREE(&nfsi->nfs_page_tree, GFP_ATOMIC); |
Christoph Lameter | a35afb8 | 2007-05-16 22:10:57 -0700 | [diff] [blame] | 1462 | nfsi->npages = 0; |
Trond Myklebust | ff778d0 | 2010-02-19 16:53:39 -0800 | [diff] [blame] | 1463 | nfsi->ncommit = 0; |
Trond Myklebust | 565277f | 2007-10-15 18:17:53 -0400 | [diff] [blame] | 1464 | atomic_set(&nfsi->silly_count, 1); |
| 1465 | INIT_HLIST_HEAD(&nfsi->silly_list); |
| 1466 | init_waitqueue_head(&nfsi->waitqueue); |
Christoph Lameter | a35afb8 | 2007-05-16 22:10:57 -0700 | [diff] [blame] | 1467 | nfs4_init_once(nfsi); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1468 | } |
Paul Mundt | 20c2df8 | 2007-07-20 10:11:58 +0900 | [diff] [blame] | 1469 | |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 1470 | static int __init nfs_init_inodecache(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1471 | { |
| 1472 | nfs_inode_cachep = kmem_cache_create("nfs_inode_cache", |
| 1473 | sizeof(struct nfs_inode), |
Paul Jackson | fffb60f | 2006-03-24 03:16:06 -0800 | [diff] [blame] | 1474 | 0, (SLAB_RECLAIM_ACCOUNT| |
| 1475 | SLAB_MEM_SPREAD), |
Paul Mundt | 20c2df8 | 2007-07-20 10:11:58 +0900 | [diff] [blame] | 1476 | init_once); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1477 | if (nfs_inode_cachep == NULL) |
| 1478 | return -ENOMEM; |
| 1479 | |
| 1480 | return 0; |
| 1481 | } |
| 1482 | |
David Brownell | 266bee8 | 2006-06-27 12:59:15 -0700 | [diff] [blame] | 1483 | static void nfs_destroy_inodecache(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1484 | { |
Alexey Dobriyan | 1a1d92c | 2006-09-27 01:49:40 -0700 | [diff] [blame] | 1485 | kmem_cache_destroy(nfs_inode_cachep); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1486 | } |
| 1487 | |
Trond Myklebust | 5746006 | 2008-02-19 20:04:22 -0500 | [diff] [blame] | 1488 | struct workqueue_struct *nfsiod_workqueue; |
| 1489 | |
| 1490 | /* |
| 1491 | * start up the nfsiod workqueue |
| 1492 | */ |
| 1493 | static int nfsiod_start(void) |
| 1494 | { |
| 1495 | struct workqueue_struct *wq; |
| 1496 | dprintk("RPC: creating workqueue nfsiod\n"); |
Trond Myklebust | 6095889 | 2010-09-21 16:55:31 -0400 | [diff] [blame] | 1497 | wq = alloc_workqueue("nfsiod", WQ_RESCUER, 0); |
Trond Myklebust | 5746006 | 2008-02-19 20:04:22 -0500 | [diff] [blame] | 1498 | if (wq == NULL) |
| 1499 | return -ENOMEM; |
| 1500 | nfsiod_workqueue = wq; |
| 1501 | return 0; |
| 1502 | } |
| 1503 | |
| 1504 | /* |
| 1505 | * Destroy the nfsiod workqueue |
| 1506 | */ |
| 1507 | static void nfsiod_stop(void) |
| 1508 | { |
| 1509 | struct workqueue_struct *wq; |
| 1510 | |
| 1511 | wq = nfsiod_workqueue; |
| 1512 | if (wq == NULL) |
| 1513 | return; |
| 1514 | nfsiod_workqueue = NULL; |
| 1515 | destroy_workqueue(wq); |
| 1516 | } |
| 1517 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1518 | /* |
| 1519 | * Initialize NFS |
| 1520 | */ |
| 1521 | static int __init init_nfs_fs(void) |
| 1522 | { |
| 1523 | int err; |
| 1524 | |
Bryan Schumaker | 955a857 | 2010-09-29 15:41:49 -0400 | [diff] [blame] | 1525 | err = nfs_idmap_init(); |
| 1526 | if (err < 0) |
| 1527 | goto out9; |
| 1528 | |
Trond Myklebust | e571cbf | 2009-08-19 18:12:27 -0400 | [diff] [blame] | 1529 | err = nfs_dns_resolver_init(); |
| 1530 | if (err < 0) |
| 1531 | goto out8; |
| 1532 | |
David Howells | 8ec442a | 2009-04-03 16:42:42 +0100 | [diff] [blame] | 1533 | err = nfs_fscache_register(); |
| 1534 | if (err < 0) |
| 1535 | goto out7; |
| 1536 | |
Trond Myklebust | 5746006 | 2008-02-19 20:04:22 -0500 | [diff] [blame] | 1537 | err = nfsiod_start(); |
| 1538 | if (err) |
| 1539 | goto out6; |
| 1540 | |
David Howells | 6aaca56 | 2006-08-22 20:06:13 -0400 | [diff] [blame] | 1541 | err = nfs_fs_proc_init(); |
| 1542 | if (err) |
| 1543 | goto out5; |
| 1544 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1545 | err = nfs_init_nfspagecache(); |
| 1546 | if (err) |
| 1547 | goto out4; |
| 1548 | |
| 1549 | err = nfs_init_inodecache(); |
| 1550 | if (err) |
| 1551 | goto out3; |
| 1552 | |
| 1553 | err = nfs_init_readpagecache(); |
| 1554 | if (err) |
| 1555 | goto out2; |
| 1556 | |
| 1557 | err = nfs_init_writepagecache(); |
| 1558 | if (err) |
| 1559 | goto out1; |
| 1560 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1561 | err = nfs_init_directcache(); |
| 1562 | if (err) |
| 1563 | goto out0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1564 | |
| 1565 | #ifdef CONFIG_PROC_FS |
| 1566 | rpc_proc_register(&nfs_rpcstat); |
| 1567 | #endif |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 1568 | if ((err = register_nfs_fs()) != 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1569 | goto out; |
| 1570 | return 0; |
| 1571 | out: |
| 1572 | #ifdef CONFIG_PROC_FS |
| 1573 | rpc_proc_unregister("nfs"); |
| 1574 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1575 | nfs_destroy_directcache(); |
Chuck Lever | 6b59a75 | 2005-11-30 18:08:19 -0500 | [diff] [blame] | 1576 | out0: |
Chuck Lever | 6b59a75 | 2005-11-30 18:08:19 -0500 | [diff] [blame] | 1577 | nfs_destroy_writepagecache(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1578 | out1: |
| 1579 | nfs_destroy_readpagecache(); |
| 1580 | out2: |
| 1581 | nfs_destroy_inodecache(); |
| 1582 | out3: |
| 1583 | nfs_destroy_nfspagecache(); |
| 1584 | out4: |
David Howells | 6aaca56 | 2006-08-22 20:06:13 -0400 | [diff] [blame] | 1585 | nfs_fs_proc_exit(); |
| 1586 | out5: |
Trond Myklebust | 5746006 | 2008-02-19 20:04:22 -0500 | [diff] [blame] | 1587 | nfsiod_stop(); |
| 1588 | out6: |
David Howells | 8ec442a | 2009-04-03 16:42:42 +0100 | [diff] [blame] | 1589 | nfs_fscache_unregister(); |
| 1590 | out7: |
Trond Myklebust | e571cbf | 2009-08-19 18:12:27 -0400 | [diff] [blame] | 1591 | nfs_dns_resolver_destroy(); |
| 1592 | out8: |
Bryan Schumaker | 955a857 | 2010-09-29 15:41:49 -0400 | [diff] [blame] | 1593 | nfs_idmap_quit(); |
| 1594 | out9: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1595 | return err; |
| 1596 | } |
| 1597 | |
| 1598 | static void __exit exit_nfs_fs(void) |
| 1599 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1600 | nfs_destroy_directcache(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1601 | nfs_destroy_writepagecache(); |
| 1602 | nfs_destroy_readpagecache(); |
| 1603 | nfs_destroy_inodecache(); |
| 1604 | nfs_destroy_nfspagecache(); |
David Howells | 8ec442a | 2009-04-03 16:42:42 +0100 | [diff] [blame] | 1605 | nfs_fscache_unregister(); |
Trond Myklebust | e571cbf | 2009-08-19 18:12:27 -0400 | [diff] [blame] | 1606 | nfs_dns_resolver_destroy(); |
Bryan Schumaker | 955a857 | 2010-09-29 15:41:49 -0400 | [diff] [blame] | 1607 | nfs_idmap_quit(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1608 | #ifdef CONFIG_PROC_FS |
| 1609 | rpc_proc_unregister("nfs"); |
| 1610 | #endif |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 1611 | unregister_nfs_fs(); |
David Howells | 6aaca56 | 2006-08-22 20:06:13 -0400 | [diff] [blame] | 1612 | nfs_fs_proc_exit(); |
Trond Myklebust | 5746006 | 2008-02-19 20:04:22 -0500 | [diff] [blame] | 1613 | nfsiod_stop(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1614 | } |
| 1615 | |
| 1616 | /* Not quite true; I just maintain it */ |
| 1617 | MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>"); |
| 1618 | MODULE_LICENSE("GPL"); |
Trond Myklebust | f43bf0b | 2007-10-09 12:01:04 -0400 | [diff] [blame] | 1619 | module_param(enable_ino64, bool, 0644); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1620 | |
| 1621 | module_init(init_nfs_fs) |
| 1622 | module_exit(exit_nfs_fs) |