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> |
Frank Filz | 3fa0b4e | 2010-12-02 19:31:23 +0000 | [diff] [blame] | 40 | #include <linux/compat.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | |
| 42 | #include <asm/system.h> |
| 43 | #include <asm/uaccess.h> |
| 44 | |
Trond Myklebust | 4ce7971 | 2005-06-22 17:16:21 +0000 | [diff] [blame] | 45 | #include "nfs4_fs.h" |
Trond Myklebust | a72b442 | 2006-01-03 09:55:41 +0100 | [diff] [blame] | 46 | #include "callback.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 47 | #include "delegation.h" |
Chuck Lever | d9ef5a8 | 2006-03-20 13:44:13 -0500 | [diff] [blame] | 48 | #include "iostat.h" |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 49 | #include "internal.h" |
David Howells | 8ec442a | 2009-04-03 16:42:42 +0100 | [diff] [blame] | 50 | #include "fscache.h" |
Trond Myklebust | e571cbf | 2009-08-19 18:12:27 -0400 | [diff] [blame] | 51 | #include "dns_resolve.h" |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 52 | #include "pnfs.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | |
| 54 | #define NFSDBG_FACILITY NFSDBG_VFS |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 55 | |
Trond Myklebust | f43bf0b | 2007-10-09 12:01:04 -0400 | [diff] [blame] | 56 | #define NFS_64_BIT_INODE_NUMBERS_ENABLED 1 |
| 57 | |
| 58 | /* Default is to see 64-bit inode numbers */ |
| 59 | static int enable_ino64 = NFS_64_BIT_INODE_NUMBERS_ENABLED; |
| 60 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 61 | static void nfs_invalidate_inode(struct inode *); |
Trond Myklebust | 24aa1fe | 2005-12-03 15:20:07 -0500 | [diff] [blame] | 62 | static int nfs_update_inode(struct inode *, struct nfs_fattr *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | |
Christoph Lameter | e18b890 | 2006-12-06 20:33:20 -0800 | [diff] [blame] | 64 | static struct kmem_cache * nfs_inode_cachep; |
Andreas Gruenbacher | b7fa055 | 2005-06-22 17:16:27 +0000 | [diff] [blame] | 65 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 66 | static inline unsigned long |
| 67 | nfs_fattr_to_ino_t(struct nfs_fattr *fattr) |
| 68 | { |
| 69 | return nfs_fileid_to_ino_t(fattr->fileid); |
| 70 | } |
| 71 | |
Trond Myklebust | f43bf0b | 2007-10-09 12:01:04 -0400 | [diff] [blame] | 72 | /** |
Trond Myklebust | 72cb77f | 2009-03-11 14:10:30 -0400 | [diff] [blame] | 73 | * nfs_wait_bit_killable - helper for functions that are sleeping on bit locks |
| 74 | * @word: long word containing the bit lock |
| 75 | */ |
| 76 | int nfs_wait_bit_killable(void *word) |
| 77 | { |
| 78 | if (fatal_signal_pending(current)) |
| 79 | return -ERESTARTSYS; |
| 80 | schedule(); |
| 81 | return 0; |
| 82 | } |
| 83 | |
| 84 | /** |
Trond Myklebust | f43bf0b | 2007-10-09 12:01:04 -0400 | [diff] [blame] | 85 | * nfs_compat_user_ino64 - returns the user-visible inode number |
| 86 | * @fileid: 64-bit fileid |
| 87 | * |
| 88 | * This function returns a 32-bit inode number if the boot parameter |
| 89 | * nfs.enable_ino64 is zero. |
| 90 | */ |
| 91 | u64 nfs_compat_user_ino64(u64 fileid) |
| 92 | { |
Frank Filz | 3fa0b4e | 2010-12-02 19:31:23 +0000 | [diff] [blame] | 93 | #ifdef CONFIG_COMPAT |
| 94 | compat_ulong_t ino; |
| 95 | #else |
| 96 | unsigned long ino; |
| 97 | #endif |
Trond Myklebust | f43bf0b | 2007-10-09 12:01:04 -0400 | [diff] [blame] | 98 | |
| 99 | if (enable_ino64) |
| 100 | return fileid; |
| 101 | ino = fileid; |
| 102 | if (sizeof(ino) < sizeof(fileid)) |
| 103 | ino ^= fileid >> (sizeof(fileid)-sizeof(ino)) * 8; |
| 104 | return ino; |
| 105 | } |
| 106 | |
Al Viro | b57922d | 2010-06-07 14:34:48 -0400 | [diff] [blame] | 107 | static void nfs_clear_inode(struct inode *inode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 108 | { |
Trond Myklebust | da6d503 | 2006-06-01 17:26:35 -0400 | [diff] [blame] | 109 | /* |
| 110 | * The following should never happen... |
| 111 | */ |
| 112 | BUG_ON(nfs_have_writebacks(inode)); |
Trond Myklebust | 1c3c07e | 2006-07-25 11:28:18 -0400 | [diff] [blame] | 113 | BUG_ON(!list_empty(&NFS_I(inode)->open_files)); |
Trond Myklebust | ada70d9 | 2005-06-22 17:16:22 +0000 | [diff] [blame] | 114 | nfs_zap_acl_cache(inode); |
Trond Myklebust | 1c3c07e | 2006-07-25 11:28:18 -0400 | [diff] [blame] | 115 | nfs_access_zap_cache(inode); |
David Howells | ef79c09 | 2009-04-03 16:42:43 +0100 | [diff] [blame] | 116 | nfs_fscache_release_inode_cookie(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 117 | } |
| 118 | |
Al Viro | b57922d | 2010-06-07 14:34:48 -0400 | [diff] [blame] | 119 | void nfs_evict_inode(struct inode *inode) |
| 120 | { |
| 121 | truncate_inode_pages(&inode->i_data, 0); |
| 122 | end_writeback(inode); |
| 123 | nfs_clear_inode(inode); |
| 124 | } |
| 125 | |
Trond Myklebust | 29884df | 2005-12-13 16:13:54 -0500 | [diff] [blame] | 126 | /** |
| 127 | * nfs_sync_mapping - helper to flush all mmapped dirty data to disk |
| 128 | */ |
| 129 | int nfs_sync_mapping(struct address_space *mapping) |
| 130 | { |
Trond Myklebust | 5cf9521 | 2010-02-19 17:03:29 -0800 | [diff] [blame] | 131 | int ret = 0; |
Trond Myklebust | 29884df | 2005-12-13 16:13:54 -0500 | [diff] [blame] | 132 | |
Trond Myklebust | 5cf9521 | 2010-02-19 17:03:29 -0800 | [diff] [blame] | 133 | if (mapping->nrpages != 0) { |
| 134 | unmap_mapping_range(mapping, 0, 0, 0); |
| 135 | ret = nfs_wb_all(mapping->host); |
| 136 | } |
Trond Myklebust | 29884df | 2005-12-13 16:13:54 -0500 | [diff] [blame] | 137 | return ret; |
| 138 | } |
| 139 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 140 | /* |
| 141 | * Invalidate the local caches |
| 142 | */ |
Trond Myklebust | b37b03b | 2005-11-25 17:10:06 -0500 | [diff] [blame] | 143 | static void nfs_zap_caches_locked(struct inode *inode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 144 | { |
| 145 | struct nfs_inode *nfsi = NFS_I(inode); |
| 146 | int mode = inode->i_mode; |
| 147 | |
Chuck Lever | 91d5b47 | 2006-03-20 13:44:14 -0500 | [diff] [blame] | 148 | nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE); |
| 149 | |
Trond Myklebust | c7c2097 | 2007-09-28 19:22:40 -0400 | [diff] [blame] | 150 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); |
| 151 | nfsi->attrtimeo_timestamp = jiffies; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 152 | |
| 153 | memset(NFS_COOKIEVERF(inode), 0, sizeof(NFS_COOKIEVERF(inode))); |
| 154 | if (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode)) |
Chuck Lever | 5529680 | 2005-08-18 11:24:09 -0700 | [diff] [blame] | 155 | 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] | 156 | else |
Chuck Lever | 5529680 | 2005-08-18 11:24:09 -0700 | [diff] [blame] | 157 | 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] | 158 | } |
Chuck Lever | dc59250 | 2005-08-18 11:24:12 -0700 | [diff] [blame] | 159 | |
Trond Myklebust | b37b03b | 2005-11-25 17:10:06 -0500 | [diff] [blame] | 160 | void nfs_zap_caches(struct inode *inode) |
| 161 | { |
| 162 | spin_lock(&inode->i_lock); |
| 163 | nfs_zap_caches_locked(inode); |
Chuck Lever | dc59250 | 2005-08-18 11:24:12 -0700 | [diff] [blame] | 164 | spin_unlock(&inode->i_lock); |
Trond Myklebust | ada70d9 | 2005-06-22 17:16:22 +0000 | [diff] [blame] | 165 | } |
| 166 | |
Trond Myklebust | cd9ae2b | 2006-10-19 23:28:40 -0700 | [diff] [blame] | 167 | void nfs_zap_mapping(struct inode *inode, struct address_space *mapping) |
| 168 | { |
| 169 | if (mapping->nrpages != 0) { |
| 170 | spin_lock(&inode->i_lock); |
| 171 | NFS_I(inode)->cache_validity |= NFS_INO_INVALID_DATA; |
| 172 | spin_unlock(&inode->i_lock); |
| 173 | } |
| 174 | } |
| 175 | |
Trond Myklebust | f41f741 | 2008-06-11 17:39:04 -0400 | [diff] [blame] | 176 | void nfs_zap_acl_cache(struct inode *inode) |
Trond Myklebust | ada70d9 | 2005-06-22 17:16:22 +0000 | [diff] [blame] | 177 | { |
| 178 | void (*clear_acl_cache)(struct inode *); |
| 179 | |
| 180 | clear_acl_cache = NFS_PROTO(inode)->clear_acl_cache; |
| 181 | if (clear_acl_cache != NULL) |
| 182 | clear_acl_cache(inode); |
Chuck Lever | dc59250 | 2005-08-18 11:24:12 -0700 | [diff] [blame] | 183 | spin_lock(&inode->i_lock); |
Chuck Lever | 5529680 | 2005-08-18 11:24:09 -0700 | [diff] [blame] | 184 | NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_ACL; |
Chuck Lever | dc59250 | 2005-08-18 11:24:12 -0700 | [diff] [blame] | 185 | spin_unlock(&inode->i_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 186 | } |
| 187 | |
Trond Myklebust | c481299 | 2007-09-28 17:11:45 -0400 | [diff] [blame] | 188 | void nfs_invalidate_atime(struct inode *inode) |
| 189 | { |
| 190 | spin_lock(&inode->i_lock); |
| 191 | NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATIME; |
| 192 | spin_unlock(&inode->i_lock); |
| 193 | } |
| 194 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 195 | /* |
Trond Myklebust | b37b03b | 2005-11-25 17:10:06 -0500 | [diff] [blame] | 196 | * Invalidate, but do not unhash, the inode. |
| 197 | * NB: must be called with inode->i_lock held! |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 198 | */ |
Trond Myklebust | b37b03b | 2005-11-25 17:10:06 -0500 | [diff] [blame] | 199 | static void nfs_invalidate_inode(struct inode *inode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 200 | { |
Benny Halevy | 3a10c30 | 2008-01-23 08:58:59 +0200 | [diff] [blame] | 201 | set_bit(NFS_INO_STALE, &NFS_I(inode)->flags); |
Trond Myklebust | b37b03b | 2005-11-25 17:10:06 -0500 | [diff] [blame] | 202 | nfs_zap_caches_locked(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 203 | } |
| 204 | |
| 205 | struct nfs_find_desc { |
| 206 | struct nfs_fh *fh; |
| 207 | struct nfs_fattr *fattr; |
| 208 | }; |
| 209 | |
| 210 | /* |
| 211 | * In NFSv3 we can have 64bit inode numbers. In order to support |
| 212 | * this, and re-exported directories (also seen in NFSv2) |
| 213 | * we are forced to allow 2 different inodes to have the same |
| 214 | * i_ino. |
| 215 | */ |
| 216 | static int |
| 217 | nfs_find_actor(struct inode *inode, void *opaque) |
| 218 | { |
| 219 | struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque; |
| 220 | struct nfs_fh *fh = desc->fh; |
| 221 | struct nfs_fattr *fattr = desc->fattr; |
| 222 | |
| 223 | if (NFS_FILEID(inode) != fattr->fileid) |
| 224 | return 0; |
| 225 | if (nfs_compare_fh(NFS_FH(inode), fh)) |
| 226 | return 0; |
| 227 | if (is_bad_inode(inode) || NFS_STALE(inode)) |
| 228 | return 0; |
| 229 | return 1; |
| 230 | } |
| 231 | |
| 232 | static int |
| 233 | nfs_init_locked(struct inode *inode, void *opaque) |
| 234 | { |
| 235 | struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque; |
| 236 | struct nfs_fattr *fattr = desc->fattr; |
| 237 | |
Benny Halevy | 99fadcd | 2008-01-23 08:59:08 +0200 | [diff] [blame] | 238 | set_nfs_fileid(inode, fattr->fileid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 239 | nfs_copy_fh(NFS_FH(inode), desc->fh); |
| 240 | return 0; |
| 241 | } |
| 242 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 243 | /* |
| 244 | * This is our front-end to iget that looks up inodes by file handle |
| 245 | * instead of inode number. |
| 246 | */ |
| 247 | struct inode * |
| 248 | nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr) |
| 249 | { |
| 250 | struct nfs_find_desc desc = { |
| 251 | .fh = fh, |
| 252 | .fattr = fattr |
| 253 | }; |
Trond Myklebust | 03f28e3 | 2006-03-20 13:44:48 -0500 | [diff] [blame] | 254 | struct inode *inode = ERR_PTR(-ENOENT); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 255 | unsigned long hash; |
| 256 | |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 257 | if ((fattr->valid & NFS_ATTR_FATTR_FILEID) == 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 258 | goto out_no_inode; |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 259 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) == 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 260 | goto out_no_inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 261 | |
| 262 | hash = nfs_fattr_to_ino_t(fattr); |
| 263 | |
Trond Myklebust | 03f28e3 | 2006-03-20 13:44:48 -0500 | [diff] [blame] | 264 | inode = iget5_locked(sb, hash, nfs_find_actor, nfs_init_locked, &desc); |
| 265 | if (inode == NULL) { |
| 266 | inode = ERR_PTR(-ENOMEM); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 267 | goto out_no_inode; |
Trond Myklebust | 03f28e3 | 2006-03-20 13:44:48 -0500 | [diff] [blame] | 268 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 269 | |
| 270 | if (inode->i_state & I_NEW) { |
| 271 | struct nfs_inode *nfsi = NFS_I(inode); |
Trond Myklebust | b0c4fdd | 2007-02-05 14:44:22 -0800 | [diff] [blame] | 272 | unsigned long now = jiffies; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 273 | |
| 274 | /* We set i_ino for the few things that still rely on it, |
| 275 | * such as stat(2) */ |
| 276 | inode->i_ino = hash; |
| 277 | |
| 278 | /* We can't support update_atime(), since the server will reset it */ |
| 279 | inode->i_flags |= S_NOATIME|S_NOCMTIME; |
| 280 | inode->i_mode = fattr->mode; |
Trond Myklebust | 62ab460c | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 281 | if ((fattr->valid & NFS_ATTR_FATTR_MODE) == 0 |
| 282 | && nfs_server_capable(inode, NFS_CAP_MODE)) |
| 283 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR |
| 284 | | NFS_INO_INVALID_ACCESS |
| 285 | | NFS_INO_INVALID_ACL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 286 | /* Why so? Because we want revalidate for devices/FIFOs, and |
| 287 | * that's precisely what we have in nfs_file_inode_operations. |
| 288 | */ |
David Howells | 8fa5c00 | 2006-08-22 20:06:12 -0400 | [diff] [blame] | 289 | 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] | 290 | if (S_ISREG(inode->i_mode)) { |
| 291 | inode->i_fop = &nfs_file_operations; |
| 292 | inode->i_data.a_ops = &nfs_file_aops; |
| 293 | inode->i_data.backing_dev_info = &NFS_SB(sb)->backing_dev_info; |
| 294 | } else if (S_ISDIR(inode->i_mode)) { |
David Howells | 8fa5c00 | 2006-08-22 20:06:12 -0400 | [diff] [blame] | 295 | 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] | 296 | inode->i_fop = &nfs_dir_operations; |
Trond Myklebust | 11de3b1 | 2010-12-01 14:17:06 -0500 | [diff] [blame] | 297 | inode->i_data.a_ops = &nfs_dir_aops; |
Bryan Schumaker | 0715dc6 | 2010-09-24 18:50:01 -0400 | [diff] [blame] | 298 | if (nfs_server_capable(inode, NFS_CAP_READDIRPLUS)) |
Benny Halevy | 3a10c30 | 2008-01-23 08:58:59 +0200 | [diff] [blame] | 299 | set_bit(NFS_INO_ADVISE_RDPLUS, &NFS_I(inode)->flags); |
Trond Myklebust | 55a9759 | 2006-06-09 09:34:19 -0400 | [diff] [blame] | 300 | /* Deal with crossing mountpoints */ |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 301 | if ((fattr->valid & NFS_ATTR_FATTR_FSID) |
| 302 | && !nfs_fsid_equal(&NFS_SB(sb)->fsid, &fattr->fsid)) { |
Manoj Naik | 6b97fd3 | 2006-06-09 09:34:29 -0400 | [diff] [blame] | 303 | if (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) |
| 304 | inode->i_op = &nfs_referral_inode_operations; |
| 305 | else |
| 306 | inode->i_op = &nfs_mountpoint_inode_operations; |
Trond Myklebust | 55a9759 | 2006-06-09 09:34:19 -0400 | [diff] [blame] | 307 | inode->i_fop = NULL; |
David Howells | 36d43a4 | 2011-01-14 18:45:42 +0000 | [diff] [blame] | 308 | inode->i_flags |= S_AUTOMOUNT; |
Trond Myklebust | 55a9759 | 2006-06-09 09:34:19 -0400 | [diff] [blame] | 309 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 310 | } else if (S_ISLNK(inode->i_mode)) |
| 311 | inode->i_op = &nfs_symlink_inode_operations; |
| 312 | else |
| 313 | init_special_inode(inode, inode->i_mode, fattr->rdev); |
| 314 | |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 315 | memset(&inode->i_atime, 0, sizeof(inode->i_atime)); |
| 316 | memset(&inode->i_mtime, 0, sizeof(inode->i_mtime)); |
| 317 | memset(&inode->i_ctime, 0, sizeof(inode->i_ctime)); |
| 318 | nfsi->change_attr = 0; |
| 319 | inode->i_size = 0; |
| 320 | inode->i_nlink = 0; |
| 321 | inode->i_uid = -2; |
| 322 | inode->i_gid = -2; |
| 323 | inode->i_blocks = 0; |
| 324 | memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf)); |
| 325 | |
Trond Myklebust | 3380114 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 326 | nfsi->read_cache_jiffies = fattr->time_start; |
Trond Myklebust | 4704f0e | 2008-10-14 19:16:07 -0400 | [diff] [blame] | 327 | nfsi->attr_gencount = fattr->gencount; |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 328 | if (fattr->valid & NFS_ATTR_FATTR_ATIME) |
| 329 | inode->i_atime = fattr->atime; |
Trond Myklebust | 62ab460c | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 330 | else if (nfs_server_capable(inode, NFS_CAP_ATIME)) |
| 331 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 332 | if (fattr->valid & NFS_ATTR_FATTR_MTIME) |
| 333 | inode->i_mtime = fattr->mtime; |
Trond Myklebust | 62ab460c | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 334 | else if (nfs_server_capable(inode, NFS_CAP_MTIME)) |
| 335 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR |
| 336 | | NFS_INO_INVALID_DATA; |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 337 | if (fattr->valid & NFS_ATTR_FATTR_CTIME) |
| 338 | inode->i_ctime = fattr->ctime; |
Trond Myklebust | 62ab460c | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 339 | else if (nfs_server_capable(inode, NFS_CAP_CTIME)) |
| 340 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR |
| 341 | | NFS_INO_INVALID_ACCESS |
| 342 | | NFS_INO_INVALID_ACL; |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 343 | if (fattr->valid & NFS_ATTR_FATTR_CHANGE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 344 | nfsi->change_attr = fattr->change_attr; |
Trond Myklebust | 62ab460c | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 345 | else if (nfs_server_capable(inode, NFS_CAP_CHANGE_ATTR)) |
| 346 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR |
| 347 | | NFS_INO_INVALID_DATA; |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 348 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) |
| 349 | inode->i_size = nfs_size_to_loff_t(fattr->size); |
Trond Myklebust | 62ab460c | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 350 | else |
| 351 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR |
| 352 | | NFS_INO_INVALID_DATA |
| 353 | | NFS_INO_REVAL_PAGECACHE; |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 354 | if (fattr->valid & NFS_ATTR_FATTR_NLINK) |
| 355 | inode->i_nlink = fattr->nlink; |
Trond Myklebust | 62ab460c | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 356 | else if (nfs_server_capable(inode, NFS_CAP_NLINK)) |
| 357 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 358 | if (fattr->valid & NFS_ATTR_FATTR_OWNER) |
| 359 | inode->i_uid = fattr->uid; |
Trond Myklebust | 62ab460c | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 360 | else if (nfs_server_capable(inode, NFS_CAP_OWNER)) |
| 361 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR |
| 362 | | NFS_INO_INVALID_ACCESS |
| 363 | | NFS_INO_INVALID_ACL; |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 364 | if (fattr->valid & NFS_ATTR_FATTR_GROUP) |
| 365 | inode->i_gid = fattr->gid; |
Trond Myklebust | 62ab460c | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 366 | else if (nfs_server_capable(inode, NFS_CAP_OWNER_GROUP)) |
| 367 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR |
| 368 | | NFS_INO_INVALID_ACCESS |
| 369 | | NFS_INO_INVALID_ACL; |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 370 | if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED) |
| 371 | inode->i_blocks = fattr->du.nfs2.blocks; |
| 372 | if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 373 | /* |
| 374 | * report the blocks in 512byte units |
| 375 | */ |
| 376 | inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 377 | } |
| 378 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); |
Trond Myklebust | b0c4fdd | 2007-02-05 14:44:22 -0800 | [diff] [blame] | 379 | nfsi->attrtimeo_timestamp = now; |
Trond Myklebust | 1c3c07e | 2006-07-25 11:28:18 -0400 | [diff] [blame] | 380 | nfsi->access_cache = RB_ROOT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 381 | |
David Howells | ef79c09 | 2009-04-03 16:42:43 +0100 | [diff] [blame] | 382 | nfs_fscache_init_inode_cookie(inode); |
| 383 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 384 | unlock_new_inode(inode); |
| 385 | } else |
| 386 | nfs_refresh_inode(inode, fattr); |
| 387 | dprintk("NFS: nfs_fhget(%s/%Ld ct=%d)\n", |
| 388 | inode->i_sb->s_id, |
| 389 | (long long)NFS_FILEID(inode), |
| 390 | atomic_read(&inode->i_count)); |
| 391 | |
| 392 | out: |
| 393 | return inode; |
| 394 | |
| 395 | out_no_inode: |
Trond Myklebust | 03f28e3 | 2006-03-20 13:44:48 -0500 | [diff] [blame] | 396 | dprintk("nfs_fhget: iget failed with error %ld\n", PTR_ERR(inode)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 397 | goto out; |
| 398 | } |
| 399 | |
Trond Myklebust | 659bfcd | 2008-06-10 19:39:41 -0400 | [diff] [blame] | 400 | #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] | 401 | |
| 402 | int |
| 403 | nfs_setattr(struct dentry *dentry, struct iattr *attr) |
| 404 | { |
| 405 | struct inode *inode = dentry->d_inode; |
Trond Myklebust | 987f8df | 2010-04-16 16:22:52 -0400 | [diff] [blame] | 406 | struct nfs_fattr *fattr; |
| 407 | int error = -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 408 | |
Chuck Lever | 91d5b47 | 2006-03-20 13:44:14 -0500 | [diff] [blame] | 409 | nfs_inc_stats(inode, NFSIOS_VFSSETATTR); |
| 410 | |
Jeff Layton | 188b95d | 2007-10-18 03:05:21 -0700 | [diff] [blame] | 411 | /* skip mode change if it's just for clearing setuid/setgid */ |
| 412 | if (attr->ia_valid & (ATTR_KILL_SUID | ATTR_KILL_SGID)) |
| 413 | attr->ia_valid &= ~ATTR_MODE; |
| 414 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 415 | if (attr->ia_valid & ATTR_SIZE) { |
| 416 | if (!S_ISREG(inode->i_mode) || attr->ia_size == i_size_read(inode)) |
| 417 | attr->ia_valid &= ~ATTR_SIZE; |
| 418 | } |
| 419 | |
| 420 | /* Optimization: if the end result is no change, don't RPC */ |
| 421 | attr->ia_valid &= NFS_VALID_ATTRS; |
Trond Myklebust | 659bfcd | 2008-06-10 19:39:41 -0400 | [diff] [blame] | 422 | if ((attr->ia_valid & ~ATTR_FILE) == 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 423 | return 0; |
| 424 | |
Trond Myklebust | 755c1e2 | 2006-03-20 13:44:06 -0500 | [diff] [blame] | 425 | /* Write all dirty data */ |
Trond Myklebust | 1b924e5 | 2010-07-31 14:29:06 -0400 | [diff] [blame] | 426 | if (S_ISREG(inode->i_mode)) |
Trond Myklebust | e1552e1 | 2007-04-14 19:07:28 -0400 | [diff] [blame] | 427 | nfs_wb_all(inode); |
Trond Myklebust | 987f8df | 2010-04-16 16:22:52 -0400 | [diff] [blame] | 428 | |
| 429 | fattr = nfs_alloc_fattr(); |
| 430 | if (fattr == NULL) |
| 431 | goto out; |
Trond Myklebust | 642ac54 | 2005-10-18 14:20:19 -0700 | [diff] [blame] | 432 | /* |
| 433 | * Return any delegations if we're going to change ACLs |
| 434 | */ |
| 435 | if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) |
| 436 | nfs_inode_return_delegation(inode); |
Trond Myklebust | 987f8df | 2010-04-16 16:22:52 -0400 | [diff] [blame] | 437 | error = NFS_PROTO(inode)->setattr(dentry, fattr, attr); |
Trond Myklebust | 65e4308 | 2005-08-16 11:49:44 -0400 | [diff] [blame] | 438 | if (error == 0) |
Trond Myklebust | 987f8df | 2010-04-16 16:22:52 -0400 | [diff] [blame] | 439 | nfs_refresh_inode(inode, fattr); |
| 440 | nfs_free_fattr(fattr); |
| 441 | out: |
Trond Myklebust | 65e4308 | 2005-08-16 11:49:44 -0400 | [diff] [blame] | 442 | return error; |
| 443 | } |
| 444 | |
| 445 | /** |
Trond Myklebust | a3d0145 | 2008-06-11 12:21:19 -0400 | [diff] [blame] | 446 | * nfs_vmtruncate - unmap mappings "freed" by truncate() syscall |
| 447 | * @inode: inode of the file used |
| 448 | * @offset: file offset to start truncating |
| 449 | * |
| 450 | * This is a copy of the common vmtruncate, but with the locking |
| 451 | * corrected to take into account the fact that NFS requires |
| 452 | * inode->i_size to be updated under the inode->i_lock. |
| 453 | */ |
| 454 | static int nfs_vmtruncate(struct inode * inode, loff_t offset) |
| 455 | { |
npiggin@suse.de | c08d3b0 | 2009-08-21 02:35:06 +1000 | [diff] [blame] | 456 | loff_t oldsize; |
| 457 | int err; |
Trond Myklebust | a3d0145 | 2008-06-11 12:21:19 -0400 | [diff] [blame] | 458 | |
npiggin@suse.de | c08d3b0 | 2009-08-21 02:35:06 +1000 | [diff] [blame] | 459 | err = inode_newsize_ok(inode, offset); |
| 460 | if (err) |
| 461 | goto out; |
Trond Myklebust | a3d0145 | 2008-06-11 12:21:19 -0400 | [diff] [blame] | 462 | |
npiggin@suse.de | c08d3b0 | 2009-08-21 02:35:06 +1000 | [diff] [blame] | 463 | spin_lock(&inode->i_lock); |
| 464 | oldsize = inode->i_size; |
| 465 | i_size_write(inode, offset); |
| 466 | spin_unlock(&inode->i_lock); |
Trond Myklebust | a3d0145 | 2008-06-11 12:21:19 -0400 | [diff] [blame] | 467 | |
npiggin@suse.de | c08d3b0 | 2009-08-21 02:35:06 +1000 | [diff] [blame] | 468 | truncate_pagecache(inode, oldsize, offset); |
| 469 | out: |
| 470 | return err; |
Trond Myklebust | a3d0145 | 2008-06-11 12:21:19 -0400 | [diff] [blame] | 471 | } |
| 472 | |
| 473 | /** |
Trond Myklebust | 65e4308 | 2005-08-16 11:49:44 -0400 | [diff] [blame] | 474 | * nfs_setattr_update_inode - Update inode metadata after a setattr call. |
| 475 | * @inode: pointer to struct inode |
| 476 | * @attr: pointer to struct iattr |
| 477 | * |
| 478 | * Note: we do this in the *proc.c in order to ensure that |
| 479 | * it works for things like exclusive creates too. |
| 480 | */ |
| 481 | void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr) |
| 482 | { |
| 483 | if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) { |
Trond Myklebust | 2f28ea6 | 2008-10-05 14:26:11 -0400 | [diff] [blame] | 484 | spin_lock(&inode->i_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 485 | if ((attr->ia_valid & ATTR_MODE) != 0) { |
Trond Myklebust | 65e4308 | 2005-08-16 11:49:44 -0400 | [diff] [blame] | 486 | int mode = attr->ia_mode & S_IALLUGO; |
| 487 | mode |= inode->i_mode & ~S_IALLUGO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 488 | inode->i_mode = mode; |
| 489 | } |
| 490 | if ((attr->ia_valid & ATTR_UID) != 0) |
| 491 | inode->i_uid = attr->ia_uid; |
| 492 | if ((attr->ia_valid & ATTR_GID) != 0) |
| 493 | inode->i_gid = attr->ia_gid; |
Chuck Lever | 5529680 | 2005-08-18 11:24:09 -0700 | [diff] [blame] | 494 | 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] | 495 | spin_unlock(&inode->i_lock); |
Trond Myklebust | 65e4308 | 2005-08-16 11:49:44 -0400 | [diff] [blame] | 496 | } |
| 497 | if ((attr->ia_valid & ATTR_SIZE) != 0) { |
Chuck Lever | 91d5b47 | 2006-03-20 13:44:14 -0500 | [diff] [blame] | 498 | nfs_inc_stats(inode, NFSIOS_SETATTRTRUNC); |
Trond Myklebust | a3d0145 | 2008-06-11 12:21:19 -0400 | [diff] [blame] | 499 | nfs_vmtruncate(inode, attr->ia_size); |
Trond Myklebust | 65e4308 | 2005-08-16 11:49:44 -0400 | [diff] [blame] | 500 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 501 | } |
| 502 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 503 | int nfs_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat) |
| 504 | { |
| 505 | struct inode *inode = dentry->d_inode; |
Chuck Lever | 5529680 | 2005-08-18 11:24:09 -0700 | [diff] [blame] | 506 | int need_atime = NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATIME; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 507 | int err; |
| 508 | |
Trond Myklebust | acdc53b | 2010-02-19 17:03:26 -0800 | [diff] [blame] | 509 | /* Flush out writes to the server in order to update c/mtime. */ |
Chuck Lever | 28c494c | 2007-10-26 13:32:13 -0400 | [diff] [blame] | 510 | if (S_ISREG(inode->i_mode)) { |
Trond Myklebust | acdc53b | 2010-02-19 17:03:26 -0800 | [diff] [blame] | 511 | err = filemap_write_and_wait(inode->i_mapping); |
| 512 | if (err) |
| 513 | goto out; |
Chuck Lever | 28c494c | 2007-10-26 13:32:13 -0400 | [diff] [blame] | 514 | } |
Christoph Hellwig | fc33a7b | 2006-01-09 20:52:17 -0800 | [diff] [blame] | 515 | |
| 516 | /* |
| 517 | * We may force a getattr if the user cares about atime. |
| 518 | * |
| 519 | * Note that we only have to check the vfsmount flags here: |
| 520 | * - NFS always sets S_NOATIME by so checking it would give a |
| 521 | * bogus result |
| 522 | * - NFS never sets MS_NOATIME or MS_NODIRATIME so there is |
| 523 | * no point in checking those. |
| 524 | */ |
| 525 | if ((mnt->mnt_flags & MNT_NOATIME) || |
| 526 | ((mnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 527 | need_atime = 0; |
Christoph Hellwig | fc33a7b | 2006-01-09 20:52:17 -0800 | [diff] [blame] | 528 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 529 | if (need_atime) |
| 530 | err = __nfs_revalidate_inode(NFS_SERVER(inode), inode); |
| 531 | else |
| 532 | err = nfs_revalidate_inode(NFS_SERVER(inode), inode); |
Peter Staubach | 4e769b9 | 2007-08-03 15:07:10 -0400 | [diff] [blame] | 533 | if (!err) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 534 | generic_fillattr(inode, stat); |
Trond Myklebust | f43bf0b | 2007-10-09 12:01:04 -0400 | [diff] [blame] | 535 | stat->ino = nfs_compat_user_ino64(NFS_FILEID(inode)); |
Peter Staubach | 4e769b9 | 2007-08-03 15:07:10 -0400 | [diff] [blame] | 536 | } |
Trond Myklebust | acdc53b | 2010-02-19 17:03:26 -0800 | [diff] [blame] | 537 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 538 | return err; |
| 539 | } |
| 540 | |
Trond Myklebust | f11ac8d | 2010-06-25 16:35:53 -0400 | [diff] [blame] | 541 | static void nfs_init_lock_context(struct nfs_lock_context *l_ctx) |
| 542 | { |
| 543 | atomic_set(&l_ctx->count, 1); |
| 544 | l_ctx->lockowner = current->files; |
| 545 | l_ctx->pid = current->tgid; |
| 546 | INIT_LIST_HEAD(&l_ctx->list); |
| 547 | } |
| 548 | |
| 549 | static struct nfs_lock_context *__nfs_find_lock_context(struct nfs_open_context *ctx) |
| 550 | { |
| 551 | struct nfs_lock_context *pos; |
| 552 | |
| 553 | list_for_each_entry(pos, &ctx->lock_context.list, list) { |
| 554 | if (pos->lockowner != current->files) |
| 555 | continue; |
| 556 | if (pos->pid != current->tgid) |
| 557 | continue; |
| 558 | atomic_inc(&pos->count); |
| 559 | return pos; |
| 560 | } |
| 561 | return NULL; |
| 562 | } |
| 563 | |
| 564 | struct nfs_lock_context *nfs_get_lock_context(struct nfs_open_context *ctx) |
| 565 | { |
| 566 | struct nfs_lock_context *res, *new = NULL; |
| 567 | struct inode *inode = ctx->path.dentry->d_inode; |
| 568 | |
| 569 | spin_lock(&inode->i_lock); |
| 570 | res = __nfs_find_lock_context(ctx); |
| 571 | if (res == NULL) { |
| 572 | spin_unlock(&inode->i_lock); |
| 573 | new = kmalloc(sizeof(*new), GFP_KERNEL); |
| 574 | if (new == NULL) |
| 575 | return NULL; |
| 576 | nfs_init_lock_context(new); |
| 577 | spin_lock(&inode->i_lock); |
| 578 | res = __nfs_find_lock_context(ctx); |
| 579 | if (res == NULL) { |
| 580 | list_add_tail(&new->list, &ctx->lock_context.list); |
| 581 | new->open_context = ctx; |
| 582 | res = new; |
| 583 | new = NULL; |
| 584 | } |
| 585 | } |
| 586 | spin_unlock(&inode->i_lock); |
| 587 | kfree(new); |
| 588 | return res; |
| 589 | } |
| 590 | |
| 591 | void nfs_put_lock_context(struct nfs_lock_context *l_ctx) |
| 592 | { |
| 593 | struct nfs_open_context *ctx = l_ctx->open_context; |
| 594 | struct inode *inode = ctx->path.dentry->d_inode; |
| 595 | |
| 596 | if (!atomic_dec_and_lock(&l_ctx->count, &inode->i_lock)) |
| 597 | return; |
| 598 | list_del(&l_ctx->list); |
| 599 | spin_unlock(&inode->i_lock); |
| 600 | kfree(l_ctx); |
| 601 | } |
| 602 | |
Trond Myklebust | 7fe5c39 | 2009-03-19 15:35:50 -0400 | [diff] [blame] | 603 | /** |
| 604 | * nfs_close_context - Common close_context() routine NFSv2/v3 |
| 605 | * @ctx: pointer to context |
| 606 | * @is_sync: is this a synchronous close |
| 607 | * |
| 608 | * always ensure that the attributes are up to date if we're mounted |
| 609 | * with close-to-open semantics |
| 610 | */ |
| 611 | void nfs_close_context(struct nfs_open_context *ctx, int is_sync) |
| 612 | { |
| 613 | struct inode *inode; |
| 614 | struct nfs_server *server; |
| 615 | |
| 616 | if (!(ctx->mode & FMODE_WRITE)) |
| 617 | return; |
| 618 | if (!is_sync) |
| 619 | return; |
| 620 | inode = ctx->path.dentry->d_inode; |
| 621 | if (!list_empty(&NFS_I(inode)->open_files)) |
| 622 | return; |
| 623 | server = NFS_SERVER(inode); |
| 624 | if (server->flags & NFS_MOUNT_NOCTO) |
| 625 | return; |
| 626 | nfs_revalidate_inode(server, inode); |
| 627 | } |
| 628 | |
Trond Myklebust | cd9a1c0 | 2010-09-17 10:56:50 -0400 | [diff] [blame] | 629 | 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] | 630 | { |
| 631 | struct nfs_open_context *ctx; |
| 632 | |
Panagiotis Issaris | f52720c | 2006-09-27 01:49:39 -0700 | [diff] [blame] | 633 | ctx = kmalloc(sizeof(*ctx), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 634 | if (ctx != NULL) { |
Al Viro | 6eae797 | 2010-01-30 13:44:07 -0500 | [diff] [blame] | 635 | ctx->path = *path; |
| 636 | path_get(&ctx->path); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 637 | ctx->cred = get_rpccred(cred); |
| 638 | ctx->state = NULL; |
Trond Myklebust | cd9a1c0 | 2010-09-17 10:56:50 -0400 | [diff] [blame] | 639 | ctx->mode = f_mode; |
Jeff Layton | 66d3aac | 2008-03-31 15:01:58 -0400 | [diff] [blame] | 640 | ctx->flags = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 641 | ctx->error = 0; |
Trond Myklebust | f11ac8d | 2010-06-25 16:35:53 -0400 | [diff] [blame] | 642 | nfs_init_lock_context(&ctx->lock_context); |
| 643 | ctx->lock_context.open_context = ctx; |
Trond Myklebust | 5c78f58 | 2010-09-27 15:51:20 -0400 | [diff] [blame] | 644 | INIT_LIST_HEAD(&ctx->list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 645 | } |
| 646 | return ctx; |
| 647 | } |
| 648 | |
| 649 | struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx) |
| 650 | { |
| 651 | if (ctx != NULL) |
Trond Myklebust | f11ac8d | 2010-06-25 16:35:53 -0400 | [diff] [blame] | 652 | atomic_inc(&ctx->lock_context.count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 653 | return ctx; |
| 654 | } |
| 655 | |
Trond Myklebust | 7fe5c39 | 2009-03-19 15:35:50 -0400 | [diff] [blame] | 656 | 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] | 657 | { |
Trond Myklebust | 7fe5c39 | 2009-03-19 15:35:50 -0400 | [diff] [blame] | 658 | struct inode *inode = ctx->path.dentry->d_inode; |
Trond Myklebust | 3bec63d | 2007-06-17 16:02:44 -0400 | [diff] [blame] | 659 | |
Trond Myklebust | 5c78f58 | 2010-09-27 15:51:20 -0400 | [diff] [blame] | 660 | if (!list_empty(&ctx->list)) { |
Benny Halevy | ef84303 | 2010-09-23 12:22:09 -0400 | [diff] [blame] | 661 | if (!atomic_dec_and_lock(&ctx->lock_context.count, &inode->i_lock)) |
| 662 | return; |
| 663 | list_del(&ctx->list); |
| 664 | spin_unlock(&inode->i_lock); |
Benny Halevy | ef84303 | 2010-09-23 12:22:09 -0400 | [diff] [blame] | 665 | } else if (!atomic_dec_and_test(&ctx->lock_context.count)) |
Trond Myklebust | 5e11934 | 2007-07-26 12:06:17 -0400 | [diff] [blame] | 666 | return; |
Trond Myklebust | 5c78f58 | 2010-09-27 15:51:20 -0400 | [diff] [blame] | 667 | if (inode != NULL) |
| 668 | NFS_PROTO(inode)->close_context(ctx, is_sync); |
Trond Myklebust | 3bec63d | 2007-06-17 16:02:44 -0400 | [diff] [blame] | 669 | if (ctx->cred != NULL) |
| 670 | put_rpccred(ctx->cred); |
Jan Blunck | 31f31db1 | 2008-05-02 13:42:45 -0700 | [diff] [blame] | 671 | path_put(&ctx->path); |
Trond Myklebust | 3bec63d | 2007-06-17 16:02:44 -0400 | [diff] [blame] | 672 | kfree(ctx); |
| 673 | } |
| 674 | |
Trond Myklebust | a49c3c7 | 2007-10-18 18:03:27 -0400 | [diff] [blame] | 675 | void put_nfs_open_context(struct nfs_open_context *ctx) |
| 676 | { |
| 677 | __put_nfs_open_context(ctx, 0); |
| 678 | } |
| 679 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 680 | /* |
| 681 | * Ensure that mmap has a recent RPC credential for use when writing out |
| 682 | * shared pages |
| 683 | */ |
Trond Myklebust | cd9a1c0 | 2010-09-17 10:56:50 -0400 | [diff] [blame] | 684 | 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] | 685 | { |
Josef "Jeff" Sipek | 01cce93 | 2006-12-08 02:36:40 -0800 | [diff] [blame] | 686 | struct inode *inode = filp->f_path.dentry->d_inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 687 | struct nfs_inode *nfsi = NFS_I(inode); |
| 688 | |
| 689 | filp->private_data = get_nfs_open_context(ctx); |
| 690 | spin_lock(&inode->i_lock); |
| 691 | list_add(&ctx->list, &nfsi->open_files); |
| 692 | spin_unlock(&inode->i_lock); |
| 693 | } |
| 694 | |
Trond Myklebust | d530838 | 2005-11-04 15:33:38 -0500 | [diff] [blame] | 695 | /* |
| 696 | * Given an inode, search for an open context with the desired characteristics |
| 697 | */ |
Trond Myklebust | dc0b027 | 2008-12-23 15:21:56 -0500 | [diff] [blame] | 698 | 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] | 699 | { |
| 700 | struct nfs_inode *nfsi = NFS_I(inode); |
| 701 | struct nfs_open_context *pos, *ctx = NULL; |
| 702 | |
| 703 | spin_lock(&inode->i_lock); |
| 704 | list_for_each_entry(pos, &nfsi->open_files, list) { |
Trond Myklebust | d530838 | 2005-11-04 15:33:38 -0500 | [diff] [blame] | 705 | if (cred != NULL && pos->cred != cred) |
| 706 | continue; |
Trond Myklebust | 1544fa0 | 2010-03-25 13:54:49 -0400 | [diff] [blame] | 707 | if ((pos->mode & (FMODE_READ|FMODE_WRITE)) != mode) |
| 708 | continue; |
| 709 | ctx = get_nfs_open_context(pos); |
| 710 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 711 | } |
| 712 | spin_unlock(&inode->i_lock); |
| 713 | return ctx; |
| 714 | } |
| 715 | |
Trond Myklebust | b92dccf | 2006-03-20 13:44:03 -0500 | [diff] [blame] | 716 | static void nfs_file_clear_open_context(struct file *filp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 717 | { |
Josef "Jeff" Sipek | 01cce93 | 2006-12-08 02:36:40 -0800 | [diff] [blame] | 718 | struct inode *inode = filp->f_path.dentry->d_inode; |
Trond Myklebust | cd3758e | 2007-08-10 17:44:32 -0400 | [diff] [blame] | 719 | struct nfs_open_context *ctx = nfs_file_open_context(filp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 720 | |
| 721 | if (ctx) { |
| 722 | filp->private_data = NULL; |
| 723 | spin_lock(&inode->i_lock); |
| 724 | list_move_tail(&ctx->list, &NFS_I(inode)->open_files); |
| 725 | spin_unlock(&inode->i_lock); |
Chuck Lever | f895c53 | 2010-02-01 14:17:50 -0500 | [diff] [blame] | 726 | __put_nfs_open_context(ctx, filp->f_flags & O_DIRECT ? 0 : 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 727 | } |
| 728 | } |
| 729 | |
| 730 | /* |
| 731 | * These allocate and release file read/write context information. |
| 732 | */ |
| 733 | int nfs_open(struct inode *inode, struct file *filp) |
| 734 | { |
| 735 | struct nfs_open_context *ctx; |
| 736 | struct rpc_cred *cred; |
| 737 | |
Trond Myklebust | 98a8e32 | 2008-03-12 12:25:28 -0400 | [diff] [blame] | 738 | cred = rpc_lookup_cred(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 739 | if (IS_ERR(cred)) |
| 740 | return PTR_ERR(cred); |
Trond Myklebust | cd9a1c0 | 2010-09-17 10:56:50 -0400 | [diff] [blame] | 741 | ctx = alloc_nfs_open_context(&filp->f_path, cred, filp->f_mode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 742 | put_rpccred(cred); |
| 743 | if (ctx == NULL) |
| 744 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 745 | nfs_file_set_open_context(filp, ctx); |
| 746 | put_nfs_open_context(ctx); |
David Howells | ef79c09 | 2009-04-03 16:42:43 +0100 | [diff] [blame] | 747 | nfs_fscache_set_inode_cookie(inode, filp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 748 | return 0; |
| 749 | } |
| 750 | |
| 751 | int nfs_release(struct inode *inode, struct file *filp) |
| 752 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 753 | nfs_file_clear_open_context(filp); |
| 754 | return 0; |
| 755 | } |
| 756 | |
| 757 | /* |
| 758 | * This function is called whenever some part of NFS notices that |
| 759 | * the cached attributes have to be refreshed. |
| 760 | */ |
| 761 | int |
| 762 | __nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) |
| 763 | { |
| 764 | int status = -ESTALE; |
Trond Myklebust | a3cba2a | 2010-04-16 16:22:49 -0400 | [diff] [blame] | 765 | struct nfs_fattr *fattr = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 766 | struct nfs_inode *nfsi = NFS_I(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 767 | |
| 768 | dfprintk(PAGECACHE, "NFS: revalidating (%s/%Ld)\n", |
| 769 | inode->i_sb->s_id, (long long)NFS_FILEID(inode)); |
| 770 | |
Chuck Lever | 85233a7 | 2006-10-19 23:28:42 -0700 | [diff] [blame] | 771 | if (is_bad_inode(inode)) |
Chuck Lever | 412d582 | 2005-08-18 11:24:11 -0700 | [diff] [blame] | 772 | goto out; |
Trond Myklebust | 7fdc49c | 2007-09-28 19:11:33 -0400 | [diff] [blame] | 773 | if (NFS_STALE(inode)) |
| 774 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 775 | |
Trond Myklebust | a3cba2a | 2010-04-16 16:22:49 -0400 | [diff] [blame] | 776 | status = -ENOMEM; |
| 777 | fattr = nfs_alloc_fattr(); |
| 778 | if (fattr == NULL) |
| 779 | goto out; |
| 780 | |
Trond Myklebust | 691beb1 | 2008-10-05 14:48:22 -0400 | [diff] [blame] | 781 | nfs_inc_stats(inode, NFSIOS_INODEREVALIDATE); |
Trond Myklebust | a3cba2a | 2010-04-16 16:22:49 -0400 | [diff] [blame] | 782 | status = NFS_PROTO(inode)->getattr(server, NFS_FH(inode), fattr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 783 | if (status != 0) { |
| 784 | dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) getattr failed, error=%d\n", |
| 785 | inode->i_sb->s_id, |
| 786 | (long long)NFS_FILEID(inode), status); |
| 787 | if (status == -ESTALE) { |
| 788 | nfs_zap_caches(inode); |
| 789 | if (!S_ISDIR(inode->i_mode)) |
Benny Halevy | 3a10c30 | 2008-01-23 08:58:59 +0200 | [diff] [blame] | 790 | set_bit(NFS_INO_STALE, &NFS_I(inode)->flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 791 | } |
| 792 | goto out; |
| 793 | } |
| 794 | |
Trond Myklebust | a3cba2a | 2010-04-16 16:22:49 -0400 | [diff] [blame] | 795 | status = nfs_refresh_inode(inode, fattr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 796 | if (status) { |
| 797 | dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) refresh failed, error=%d\n", |
| 798 | inode->i_sb->s_id, |
| 799 | (long long)NFS_FILEID(inode), status); |
| 800 | goto out; |
| 801 | } |
Chuck Lever | 5529680 | 2005-08-18 11:24:09 -0700 | [diff] [blame] | 802 | |
Trond Myklebust | 24aa1fe | 2005-12-03 15:20:07 -0500 | [diff] [blame] | 803 | if (nfsi->cache_validity & NFS_INO_INVALID_ACL) |
Trond Myklebust | ada70d9 | 2005-06-22 17:16:22 +0000 | [diff] [blame] | 804 | nfs_zap_acl_cache(inode); |
Chuck Lever | 5529680 | 2005-08-18 11:24:09 -0700 | [diff] [blame] | 805 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 806 | dfprintk(PAGECACHE, "NFS: (%s/%Ld) revalidation complete\n", |
| 807 | inode->i_sb->s_id, |
| 808 | (long long)NFS_FILEID(inode)); |
| 809 | |
Chuck Lever | 412d582 | 2005-08-18 11:24:11 -0700 | [diff] [blame] | 810 | out: |
Trond Myklebust | a3cba2a | 2010-04-16 16:22:49 -0400 | [diff] [blame] | 811 | nfs_free_fattr(fattr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 812 | return status; |
| 813 | } |
| 814 | |
| 815 | int nfs_attribute_timeout(struct inode *inode) |
| 816 | { |
| 817 | struct nfs_inode *nfsi = NFS_I(inode); |
| 818 | |
Trond Myklebust | d7cf8dd | 2010-04-16 16:42:46 -0400 | [diff] [blame] | 819 | return !time_in_range_open(jiffies, nfsi->read_cache_jiffies, nfsi->read_cache_jiffies + nfsi->attrtimeo); |
| 820 | } |
| 821 | |
| 822 | static int nfs_attribute_cache_expired(struct inode *inode) |
| 823 | { |
Trond Myklebust | b4d2314 | 2010-03-10 15:21:44 -0500 | [diff] [blame] | 824 | if (nfs_have_delegated_attributes(inode)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 825 | return 0; |
Trond Myklebust | d7cf8dd | 2010-04-16 16:42:46 -0400 | [diff] [blame] | 826 | return nfs_attribute_timeout(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 827 | } |
| 828 | |
| 829 | /** |
| 830 | * nfs_revalidate_inode - Revalidate the inode attributes |
| 831 | * @server - pointer to nfs_server struct |
| 832 | * @inode - pointer to inode struct |
| 833 | * |
| 834 | * Updates inode attribute information by retrieving the data from the server. |
| 835 | */ |
| 836 | int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) |
| 837 | { |
Trond Myklebust | 44b1187 | 2006-05-25 01:40:59 -0400 | [diff] [blame] | 838 | if (!(NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATTR) |
Trond Myklebust | d7cf8dd | 2010-04-16 16:42:46 -0400 | [diff] [blame] | 839 | && !nfs_attribute_cache_expired(inode)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 840 | return NFS_STALE(inode) ? -ESTALE : 0; |
| 841 | return __nfs_revalidate_inode(server, inode); |
| 842 | } |
| 843 | |
Trond Myklebust | 1cda707 | 2010-02-19 17:03:30 -0800 | [diff] [blame] | 844 | static int nfs_invalidate_mapping(struct inode *inode, struct address_space *mapping) |
Trond Myklebust | 717d44e | 2007-01-24 11:54:55 -0800 | [diff] [blame] | 845 | { |
| 846 | struct nfs_inode *nfsi = NFS_I(inode); |
| 847 | |
| 848 | if (mapping->nrpages != 0) { |
| 849 | int ret = invalidate_inode_pages2(mapping); |
| 850 | if (ret < 0) |
| 851 | return ret; |
| 852 | } |
| 853 | spin_lock(&inode->i_lock); |
| 854 | nfsi->cache_validity &= ~NFS_INO_INVALID_DATA; |
Trond Myklebust | 2f78e43 | 2007-09-30 15:31:19 -0400 | [diff] [blame] | 855 | if (S_ISDIR(inode->i_mode)) |
Trond Myklebust | 717d44e | 2007-01-24 11:54:55 -0800 | [diff] [blame] | 856 | memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf)); |
Trond Myklebust | 717d44e | 2007-01-24 11:54:55 -0800 | [diff] [blame] | 857 | spin_unlock(&inode->i_lock); |
| 858 | nfs_inc_stats(inode, NFSIOS_DATAINVALIDATE); |
David Howells | ef79c09 | 2009-04-03 16:42:43 +0100 | [diff] [blame] | 859 | nfs_fscache_reset_inode_cookie(inode); |
Trond Myklebust | 717d44e | 2007-01-24 11:54:55 -0800 | [diff] [blame] | 860 | dfprintk(PAGECACHE, "NFS: (%s/%Ld) data cache invalidated\n", |
| 861 | inode->i_sb->s_id, (long long)NFS_FILEID(inode)); |
| 862 | return 0; |
| 863 | } |
| 864 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 865 | /** |
Trond Myklebust | 7d52e86 | 2005-06-22 17:16:30 +0000 | [diff] [blame] | 866 | * nfs_revalidate_mapping - Revalidate the pagecache |
| 867 | * @inode - pointer to host inode |
| 868 | * @mapping - pointer to mapping |
| 869 | */ |
Trond Myklebust | 44b1187 | 2006-05-25 01:40:59 -0400 | [diff] [blame] | 870 | int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping) |
Trond Myklebust | 7d52e86 | 2005-06-22 17:16:30 +0000 | [diff] [blame] | 871 | { |
| 872 | struct nfs_inode *nfsi = NFS_I(inode); |
Trond Myklebust | 44b1187 | 2006-05-25 01:40:59 -0400 | [diff] [blame] | 873 | int ret = 0; |
| 874 | |
Trond Myklebust | 44b1187 | 2006-05-25 01:40:59 -0400 | [diff] [blame] | 875 | if ((nfsi->cache_validity & NFS_INO_REVAL_PAGECACHE) |
Trond Myklebust | d7cf8dd | 2010-04-16 16:42:46 -0400 | [diff] [blame] | 876 | || nfs_attribute_cache_expired(inode) |
| 877 | || NFS_STALE(inode)) { |
Trond Myklebust | 44b1187 | 2006-05-25 01:40:59 -0400 | [diff] [blame] | 878 | ret = __nfs_revalidate_inode(NFS_SERVER(inode), inode); |
Trond Myklebust | 717d44e | 2007-01-24 11:54:55 -0800 | [diff] [blame] | 879 | if (ret < 0) |
| 880 | goto out; |
Trond Myklebust | 7d52e86 | 2005-06-22 17:16:30 +0000 | [diff] [blame] | 881 | } |
Trond Myklebust | 717d44e | 2007-01-24 11:54:55 -0800 | [diff] [blame] | 882 | if (nfsi->cache_validity & NFS_INO_INVALID_DATA) |
| 883 | ret = nfs_invalidate_mapping(inode, mapping); |
Trond Myklebust | cd9ae2b | 2006-10-19 23:28:40 -0700 | [diff] [blame] | 884 | out: |
Trond Myklebust | 44b1187 | 2006-05-25 01:40:59 -0400 | [diff] [blame] | 885 | return ret; |
Trond Myklebust | 7d52e86 | 2005-06-22 17:16:30 +0000 | [diff] [blame] | 886 | } |
| 887 | |
Trond Myklebust | 27dc1cd | 2011-01-25 15:28:21 -0500 | [diff] [blame] | 888 | static unsigned long nfs_wcc_update_inode(struct inode *inode, struct nfs_fattr *fattr) |
Trond Myklebust | a895b4a | 2006-01-03 09:55:40 +0100 | [diff] [blame] | 889 | { |
| 890 | struct nfs_inode *nfsi = NFS_I(inode); |
Trond Myklebust | 27dc1cd | 2011-01-25 15:28:21 -0500 | [diff] [blame] | 891 | unsigned long ret = 0; |
Trond Myklebust | a895b4a | 2006-01-03 09:55:40 +0100 | [diff] [blame] | 892 | |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 893 | if ((fattr->valid & NFS_ATTR_FATTR_PRECHANGE) |
| 894 | && (fattr->valid & NFS_ATTR_FATTR_CHANGE) |
| 895 | && nfsi->change_attr == fattr->pre_change_attr) { |
Trond Myklebust | 70ca885 | 2007-09-30 15:21:24 -0400 | [diff] [blame] | 896 | nfsi->change_attr = fattr->change_attr; |
| 897 | if (S_ISDIR(inode->i_mode)) |
| 898 | nfsi->cache_validity |= NFS_INO_INVALID_DATA; |
Trond Myklebust | 27dc1cd | 2011-01-25 15:28:21 -0500 | [diff] [blame] | 899 | ret |= NFS_INO_INVALID_ATTR; |
Trond Myklebust | 70ca885 | 2007-09-30 15:21:24 -0400 | [diff] [blame] | 900 | } |
Trond Myklebust | a895b4a | 2006-01-03 09:55:40 +0100 | [diff] [blame] | 901 | /* If we have atomic WCC data, we may update some attributes */ |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 902 | if ((fattr->valid & NFS_ATTR_FATTR_PRECTIME) |
| 903 | && (fattr->valid & NFS_ATTR_FATTR_CTIME) |
Trond Myklebust | 27dc1cd | 2011-01-25 15:28:21 -0500 | [diff] [blame] | 904 | && timespec_equal(&inode->i_ctime, &fattr->pre_ctime)) { |
| 905 | memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime)); |
| 906 | ret |= NFS_INO_INVALID_ATTR; |
| 907 | } |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 908 | |
| 909 | if ((fattr->valid & NFS_ATTR_FATTR_PREMTIME) |
| 910 | && (fattr->valid & NFS_ATTR_FATTR_MTIME) |
| 911 | && timespec_equal(&inode->i_mtime, &fattr->pre_mtime)) { |
Trond Myklebust | 27dc1cd | 2011-01-25 15:28:21 -0500 | [diff] [blame] | 912 | memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime)); |
| 913 | if (S_ISDIR(inode->i_mode)) |
| 914 | nfsi->cache_validity |= NFS_INO_INVALID_DATA; |
| 915 | ret |= NFS_INO_INVALID_ATTR; |
Trond Myklebust | a895b4a | 2006-01-03 09:55:40 +0100 | [diff] [blame] | 916 | } |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 917 | if ((fattr->valid & NFS_ATTR_FATTR_PRESIZE) |
| 918 | && (fattr->valid & NFS_ATTR_FATTR_SIZE) |
| 919 | && i_size_read(inode) == nfs_size_to_loff_t(fattr->pre_size) |
Trond Myklebust | 27dc1cd | 2011-01-25 15:28:21 -0500 | [diff] [blame] | 920 | && nfsi->npages == 0) { |
| 921 | i_size_write(inode, nfs_size_to_loff_t(fattr->size)); |
| 922 | ret |= NFS_INO_INVALID_ATTR; |
| 923 | } |
| 924 | return ret; |
Trond Myklebust | a895b4a | 2006-01-03 09:55:40 +0100 | [diff] [blame] | 925 | } |
| 926 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 927 | /** |
Trond Myklebust | 3380114 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 928 | * nfs_check_inode_attributes - verify consistency of the inode attribute cache |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 929 | * @inode - pointer to inode |
| 930 | * @fattr - updated attributes |
| 931 | * |
| 932 | * Verifies the attribute cache. If we have just changed the attributes, |
| 933 | * so that fattr carries weak cache consistency data, then it may |
| 934 | * also update the ctime/mtime/change_attribute. |
| 935 | */ |
Trond Myklebust | 3380114 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 936 | 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] | 937 | { |
| 938 | struct nfs_inode *nfsi = NFS_I(inode); |
| 939 | loff_t cur_size, new_isize; |
Trond Myklebust | 2a3f5fd | 2007-10-08 14:26:13 -0400 | [diff] [blame] | 940 | unsigned long invalid = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 941 | |
Chuck Lever | dc59250 | 2005-08-18 11:24:12 -0700 | [diff] [blame] | 942 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 943 | /* Has the inode gone and changed behind our back? */ |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 944 | if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 945 | return -EIO; |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 946 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) |
| 947 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 948 | |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 949 | if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 && |
Trond Myklebust | f1bb0b9 | 2006-05-25 01:40:55 -0400 | [diff] [blame] | 950 | nfsi->change_attr != fattr->change_attr) |
Trond Myklebust | 2a3f5fd | 2007-10-08 14:26:13 -0400 | [diff] [blame] | 951 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 952 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 953 | /* Verify a few of the more important attributes */ |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 954 | 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] | 955 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; |
Trond Myklebust | ca62b9c | 2006-03-20 13:44:07 -0500 | [diff] [blame] | 956 | |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 957 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) { |
| 958 | cur_size = i_size_read(inode); |
| 959 | new_isize = nfs_size_to_loff_t(fattr->size); |
| 960 | if (cur_size != new_isize && nfsi->npages == 0) |
| 961 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; |
| 962 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 963 | |
| 964 | /* Have any file permissions changed? */ |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 965 | if ((fattr->valid & NFS_ATTR_FATTR_MODE) && (inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) |
| 966 | invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; |
| 967 | if ((fattr->valid & NFS_ATTR_FATTR_OWNER) && inode->i_uid != fattr->uid) |
| 968 | invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; |
| 969 | if ((fattr->valid & NFS_ATTR_FATTR_GROUP) && inode->i_gid != fattr->gid) |
Trond Myklebust | 2a3f5fd | 2007-10-08 14:26:13 -0400 | [diff] [blame] | 970 | 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] | 971 | |
| 972 | /* Has the link count changed? */ |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 973 | if ((fattr->valid & NFS_ATTR_FATTR_NLINK) && inode->i_nlink != fattr->nlink) |
Trond Myklebust | 2a3f5fd | 2007-10-08 14:26:13 -0400 | [diff] [blame] | 974 | invalid |= NFS_INO_INVALID_ATTR; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 975 | |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 976 | 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] | 977 | invalid |= NFS_INO_INVALID_ATIME; |
| 978 | |
| 979 | if (invalid != 0) |
| 980 | nfsi->cache_validity |= invalid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 981 | |
Trond Myklebust | 3380114 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 982 | nfsi->read_cache_jiffies = fattr->time_start; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 983 | return 0; |
| 984 | } |
| 985 | |
Trond Myklebust | a10ad17 | 2008-09-23 17:28:41 -0400 | [diff] [blame] | 986 | static int nfs_ctime_need_update(const struct inode *inode, const struct nfs_fattr *fattr) |
| 987 | { |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 988 | if (!(fattr->valid & NFS_ATTR_FATTR_CTIME)) |
| 989 | return 0; |
Trond Myklebust | a10ad17 | 2008-09-23 17:28:41 -0400 | [diff] [blame] | 990 | return timespec_compare(&fattr->ctime, &inode->i_ctime) > 0; |
| 991 | } |
| 992 | |
| 993 | static int nfs_size_need_update(const struct inode *inode, const struct nfs_fattr *fattr) |
| 994 | { |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 995 | if (!(fattr->valid & NFS_ATTR_FATTR_SIZE)) |
| 996 | return 0; |
Trond Myklebust | a10ad17 | 2008-09-23 17:28:41 -0400 | [diff] [blame] | 997 | return nfs_size_to_loff_t(fattr->size) > i_size_read(inode); |
| 998 | } |
| 999 | |
Trond Myklebust | ae05f26 | 2008-10-28 15:21:40 -0400 | [diff] [blame] | 1000 | static atomic_long_t nfs_attr_generation_counter; |
Trond Myklebust | 4704f0e | 2008-10-14 19:16:07 -0400 | [diff] [blame] | 1001 | |
| 1002 | static unsigned long nfs_read_attr_generation_counter(void) |
| 1003 | { |
Trond Myklebust | ae05f26 | 2008-10-28 15:21:40 -0400 | [diff] [blame] | 1004 | return atomic_long_read(&nfs_attr_generation_counter); |
Trond Myklebust | 4704f0e | 2008-10-14 19:16:07 -0400 | [diff] [blame] | 1005 | } |
| 1006 | |
| 1007 | unsigned long nfs_inc_attr_generation_counter(void) |
| 1008 | { |
Trond Myklebust | ae05f26 | 2008-10-28 15:21:40 -0400 | [diff] [blame] | 1009 | return atomic_long_inc_return(&nfs_attr_generation_counter); |
Trond Myklebust | 4704f0e | 2008-10-14 19:16:07 -0400 | [diff] [blame] | 1010 | } |
| 1011 | |
| 1012 | void nfs_fattr_init(struct nfs_fattr *fattr) |
| 1013 | { |
| 1014 | fattr->valid = 0; |
| 1015 | fattr->time_start = jiffies; |
| 1016 | fattr->gencount = nfs_inc_attr_generation_counter(); |
| 1017 | } |
| 1018 | |
Trond Myklebust | 2d36bfde | 2010-04-16 16:22:45 -0400 | [diff] [blame] | 1019 | struct nfs_fattr *nfs_alloc_fattr(void) |
| 1020 | { |
| 1021 | struct nfs_fattr *fattr; |
| 1022 | |
| 1023 | fattr = kmalloc(sizeof(*fattr), GFP_NOFS); |
| 1024 | if (fattr != NULL) |
| 1025 | nfs_fattr_init(fattr); |
| 1026 | return fattr; |
| 1027 | } |
| 1028 | |
| 1029 | struct nfs_fh *nfs_alloc_fhandle(void) |
| 1030 | { |
| 1031 | struct nfs_fh *fh; |
| 1032 | |
| 1033 | fh = kmalloc(sizeof(struct nfs_fh), GFP_NOFS); |
| 1034 | if (fh != NULL) |
| 1035 | fh->size = 0; |
| 1036 | return fh; |
| 1037 | } |
| 1038 | |
Trond Myklebust | a10ad17 | 2008-09-23 17:28:41 -0400 | [diff] [blame] | 1039 | /** |
| 1040 | * nfs_inode_attrs_need_update - check if the inode attributes need updating |
| 1041 | * @inode - pointer to inode |
| 1042 | * @fattr - attributes |
| 1043 | * |
| 1044 | * Attempt to divine whether or not an RPC call reply carrying stale |
| 1045 | * attributes got scheduled after another call carrying updated ones. |
| 1046 | * |
| 1047 | * To do so, the function first assumes that a more recent ctime means |
| 1048 | * that the attributes in fattr are newer, however it also attempt to |
| 1049 | * catch the case where ctime either didn't change, or went backwards |
| 1050 | * (if someone reset the clock on the server) by looking at whether |
| 1051 | * 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] | 1052 | * Note also the check for wraparound of 'attr_gencount' |
Trond Myklebust | a10ad17 | 2008-09-23 17:28:41 -0400 | [diff] [blame] | 1053 | * |
| 1054 | * The function returns 'true' if it thinks the attributes in 'fattr' are |
| 1055 | * more recent than the ones cached in the inode. |
| 1056 | * |
| 1057 | */ |
| 1058 | static int nfs_inode_attrs_need_update(const struct inode *inode, const struct nfs_fattr *fattr) |
| 1059 | { |
| 1060 | const struct nfs_inode *nfsi = NFS_I(inode); |
| 1061 | |
Trond Myklebust | 4704f0e | 2008-10-14 19:16:07 -0400 | [diff] [blame] | 1062 | return ((long)fattr->gencount - (long)nfsi->attr_gencount) > 0 || |
Trond Myklebust | 03254e6 | 2008-10-09 13:27:55 -0400 | [diff] [blame] | 1063 | nfs_ctime_need_update(inode, fattr) || |
| 1064 | nfs_size_need_update(inode, fattr) || |
Trond Myklebust | 4704f0e | 2008-10-14 19:16:07 -0400 | [diff] [blame] | 1065 | ((long)nfsi->attr_gencount - (long)nfs_read_attr_generation_counter() > 0); |
Trond Myklebust | a10ad17 | 2008-09-23 17:28:41 -0400 | [diff] [blame] | 1066 | } |
| 1067 | |
Trond Myklebust | 870a5be | 2008-10-05 12:07:23 -0400 | [diff] [blame] | 1068 | static int nfs_refresh_inode_locked(struct inode *inode, struct nfs_fattr *fattr) |
| 1069 | { |
Trond Myklebust | a10ad17 | 2008-09-23 17:28:41 -0400 | [diff] [blame] | 1070 | if (nfs_inode_attrs_need_update(inode, fattr)) |
Trond Myklebust | 870a5be | 2008-10-05 12:07:23 -0400 | [diff] [blame] | 1071 | return nfs_update_inode(inode, fattr); |
| 1072 | return nfs_check_inode_attributes(inode, fattr); |
| 1073 | } |
| 1074 | |
Trond Myklebust | 3380114 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 1075 | /** |
| 1076 | * nfs_refresh_inode - try to update the inode attribute cache |
| 1077 | * @inode - pointer to inode |
| 1078 | * @fattr - updated attributes |
| 1079 | * |
| 1080 | * Check that an RPC call that returned attributes has not overlapped with |
| 1081 | * other recent updates of the inode metadata, then decide whether it is |
| 1082 | * safe to do a full update of the inode attributes, or whether just to |
| 1083 | * call nfs_check_inode_attributes. |
| 1084 | */ |
| 1085 | int nfs_refresh_inode(struct inode *inode, struct nfs_fattr *fattr) |
| 1086 | { |
Trond Myklebust | 3380114 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 1087 | int status; |
| 1088 | |
| 1089 | if ((fattr->valid & NFS_ATTR_FATTR) == 0) |
| 1090 | return 0; |
| 1091 | spin_lock(&inode->i_lock); |
Trond Myklebust | 870a5be | 2008-10-05 12:07:23 -0400 | [diff] [blame] | 1092 | status = nfs_refresh_inode_locked(inode, fattr); |
Trond Myklebust | 3380114 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 1093 | spin_unlock(&inode->i_lock); |
David Howells | ef79c09 | 2009-04-03 16:42:43 +0100 | [diff] [blame] | 1094 | |
Trond Myklebust | 3380114 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 1095 | return status; |
| 1096 | } |
| 1097 | |
Trond Myklebust | d65f557 | 2008-10-05 12:27:55 -0400 | [diff] [blame] | 1098 | static int nfs_post_op_update_inode_locked(struct inode *inode, struct nfs_fattr *fattr) |
| 1099 | { |
| 1100 | struct nfs_inode *nfsi = NFS_I(inode); |
| 1101 | |
| 1102 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; |
| 1103 | if (S_ISDIR(inode->i_mode)) |
| 1104 | nfsi->cache_validity |= NFS_INO_INVALID_DATA; |
| 1105 | if ((fattr->valid & NFS_ATTR_FATTR) == 0) |
| 1106 | return 0; |
| 1107 | return nfs_refresh_inode_locked(inode, fattr); |
| 1108 | } |
| 1109 | |
Trond Myklebust | decf491 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 1110 | /** |
| 1111 | * nfs_post_op_update_inode - try to update the inode attribute cache |
| 1112 | * @inode - pointer to inode |
| 1113 | * @fattr - updated attributes |
| 1114 | * |
| 1115 | * After an operation that has changed the inode metadata, mark the |
| 1116 | * attribute cache as being invalid, then try to update it. |
Chuck Lever | f551e44 | 2006-09-20 14:33:04 -0400 | [diff] [blame] | 1117 | * |
| 1118 | * NB: if the server didn't return any post op attributes, this |
| 1119 | * function will force the retrieval of attributes before the next |
| 1120 | * NFS request. Thus it should be used only for operations that |
| 1121 | * are expected to change one or more attributes, to avoid |
| 1122 | * unnecessary NFS requests and trips through nfs_update_inode(). |
Trond Myklebust | decf491 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 1123 | */ |
| 1124 | int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr) |
| 1125 | { |
Trond Myklebust | d65f557 | 2008-10-05 12:27:55 -0400 | [diff] [blame] | 1126 | int status; |
Trond Myklebust | decf491 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 1127 | |
Trond Myklebust | 7668fdb | 2007-10-01 09:59:15 -0400 | [diff] [blame] | 1128 | spin_lock(&inode->i_lock); |
Trond Myklebust | d65f557 | 2008-10-05 12:27:55 -0400 | [diff] [blame] | 1129 | status = nfs_post_op_update_inode_locked(inode, fattr); |
Trond Myklebust | 7668fdb | 2007-10-01 09:59:15 -0400 | [diff] [blame] | 1130 | spin_unlock(&inode->i_lock); |
Trond Myklebust | 870a5be | 2008-10-05 12:07:23 -0400 | [diff] [blame] | 1131 | return status; |
Trond Myklebust | decf491 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 1132 | } |
| 1133 | |
Trond Myklebust | 70ca885 | 2007-09-30 15:21:24 -0400 | [diff] [blame] | 1134 | /** |
| 1135 | * nfs_post_op_update_inode_force_wcc - try to update the inode attribute cache |
| 1136 | * @inode - pointer to inode |
| 1137 | * @fattr - updated attributes |
| 1138 | * |
| 1139 | * After an operation that has changed the inode metadata, mark the |
| 1140 | * attribute cache as being invalid, then try to update it. Fake up |
| 1141 | * weak cache consistency data, if none exist. |
| 1142 | * |
| 1143 | * This function is mainly designed to be used by the ->write_done() functions. |
| 1144 | */ |
| 1145 | int nfs_post_op_update_inode_force_wcc(struct inode *inode, struct nfs_fattr *fattr) |
| 1146 | { |
Trond Myklebust | d65f557 | 2008-10-05 12:27:55 -0400 | [diff] [blame] | 1147 | int status; |
| 1148 | |
| 1149 | spin_lock(&inode->i_lock); |
| 1150 | /* Don't do a WCC update if these attributes are already stale */ |
| 1151 | if ((fattr->valid & NFS_ATTR_FATTR) == 0 || |
| 1152 | !nfs_inode_attrs_need_update(inode, fattr)) { |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1153 | fattr->valid &= ~(NFS_ATTR_FATTR_PRECHANGE |
| 1154 | | NFS_ATTR_FATTR_PRESIZE |
| 1155 | | NFS_ATTR_FATTR_PREMTIME |
| 1156 | | NFS_ATTR_FATTR_PRECTIME); |
Trond Myklebust | d65f557 | 2008-10-05 12:27:55 -0400 | [diff] [blame] | 1157 | goto out_noforce; |
| 1158 | } |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1159 | if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 && |
| 1160 | (fattr->valid & NFS_ATTR_FATTR_PRECHANGE) == 0) { |
Trond Myklebust | 70ca885 | 2007-09-30 15:21:24 -0400 | [diff] [blame] | 1161 | fattr->pre_change_attr = NFS_I(inode)->change_attr; |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1162 | fattr->valid |= NFS_ATTR_FATTR_PRECHANGE; |
Trond Myklebust | 70ca885 | 2007-09-30 15:21:24 -0400 | [diff] [blame] | 1163 | } |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1164 | if ((fattr->valid & NFS_ATTR_FATTR_CTIME) != 0 && |
| 1165 | (fattr->valid & NFS_ATTR_FATTR_PRECTIME) == 0) { |
Trond Myklebust | 70ca885 | 2007-09-30 15:21:24 -0400 | [diff] [blame] | 1166 | memcpy(&fattr->pre_ctime, &inode->i_ctime, sizeof(fattr->pre_ctime)); |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1167 | fattr->valid |= NFS_ATTR_FATTR_PRECTIME; |
| 1168 | } |
| 1169 | if ((fattr->valid & NFS_ATTR_FATTR_MTIME) != 0 && |
| 1170 | (fattr->valid & NFS_ATTR_FATTR_PREMTIME) == 0) { |
Trond Myklebust | 70ca885 | 2007-09-30 15:21:24 -0400 | [diff] [blame] | 1171 | memcpy(&fattr->pre_mtime, &inode->i_mtime, sizeof(fattr->pre_mtime)); |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1172 | fattr->valid |= NFS_ATTR_FATTR_PREMTIME; |
| 1173 | } |
| 1174 | if ((fattr->valid & NFS_ATTR_FATTR_SIZE) != 0 && |
| 1175 | (fattr->valid & NFS_ATTR_FATTR_PRESIZE) == 0) { |
Trond Myklebust | a3d0145 | 2008-06-11 12:21:19 -0400 | [diff] [blame] | 1176 | fattr->pre_size = i_size_read(inode); |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1177 | fattr->valid |= NFS_ATTR_FATTR_PRESIZE; |
Trond Myklebust | 70ca885 | 2007-09-30 15:21:24 -0400 | [diff] [blame] | 1178 | } |
Trond Myklebust | d65f557 | 2008-10-05 12:27:55 -0400 | [diff] [blame] | 1179 | out_noforce: |
| 1180 | status = nfs_post_op_update_inode_locked(inode, fattr); |
| 1181 | spin_unlock(&inode->i_lock); |
| 1182 | return status; |
Trond Myklebust | 70ca885 | 2007-09-30 15:21:24 -0400 | [diff] [blame] | 1183 | } |
| 1184 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1185 | /* |
| 1186 | * Many nfs protocol calls return the new file attributes after |
| 1187 | * an operation. Here we update the inode to reflect the state |
| 1188 | * of the server's inode. |
| 1189 | * |
| 1190 | * This is a bit tricky because we have to make sure all dirty pages |
| 1191 | * have been sent off to the server before calling invalidate_inode_pages. |
| 1192 | * To make sure no other process adds more write requests while we try |
| 1193 | * our best to flush them, we make them sleep during the attribute refresh. |
| 1194 | * |
| 1195 | * A very similar scenario holds for the dir cache. |
| 1196 | */ |
Trond Myklebust | 24aa1fe | 2005-12-03 15:20:07 -0500 | [diff] [blame] | 1197 | static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1198 | { |
Trond Myklebust | 8b4bdcf | 2006-06-09 09:34:19 -0400 | [diff] [blame] | 1199 | struct nfs_server *server; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1200 | struct nfs_inode *nfsi = NFS_I(inode); |
Trond Myklebust | 951a143 | 2005-06-22 17:16:30 +0000 | [diff] [blame] | 1201 | loff_t cur_isize, new_isize; |
Trond Myklebust | 2a3f5fd | 2007-10-08 14:26:13 -0400 | [diff] [blame] | 1202 | unsigned long invalid = 0; |
Trond Myklebust | 3e7d950 | 2007-02-05 14:26:28 -0800 | [diff] [blame] | 1203 | unsigned long now = jiffies; |
Trond Myklebust | 62ab460c | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 1204 | unsigned long save_cache_validity; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1205 | |
| 1206 | dfprintk(VFS, "NFS: %s(%s/%ld ct=%d info=0x%x)\n", |
Harvey Harrison | 3110ff8 | 2008-05-02 13:42:44 -0700 | [diff] [blame] | 1207 | __func__, inode->i_sb->s_id, inode->i_ino, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1208 | atomic_read(&inode->i_count), fattr->valid); |
| 1209 | |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1210 | if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid) |
Chuck Lever | 325cfed | 2005-11-30 18:08:55 -0500 | [diff] [blame] | 1211 | goto out_fileid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1212 | |
| 1213 | /* |
| 1214 | * Make sure the inode's type hasn't changed. |
| 1215 | */ |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1216 | 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] | 1217 | goto out_changed; |
| 1218 | |
Trond Myklebust | 8b4bdcf | 2006-06-09 09:34:19 -0400 | [diff] [blame] | 1219 | server = NFS_SERVER(inode); |
Trond Myklebust | a035686 | 2007-06-05 13:26:15 -0400 | [diff] [blame] | 1220 | /* Update the fsid? */ |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1221 | if (S_ISDIR(inode->i_mode) && (fattr->valid & NFS_ATTR_FATTR_FSID) && |
Trond Myklebust | c37dcd33 | 2008-03-06 12:34:50 -0500 | [diff] [blame] | 1222 | !nfs_fsid_equal(&server->fsid, &fattr->fsid) && |
David Howells | 36d43a4 | 2011-01-14 18:45:42 +0000 | [diff] [blame] | 1223 | !IS_AUTOMOUNT(inode)) |
Trond Myklebust | 8b4bdcf | 2006-06-09 09:34:19 -0400 | [diff] [blame] | 1224 | server->fsid = fattr->fsid; |
| 1225 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1226 | /* |
| 1227 | * Update the read time so we don't revalidate too often. |
| 1228 | */ |
Trond Myklebust | 3380114 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 1229 | nfsi->read_cache_jiffies = fattr->time_start; |
Trond Myklebust | 3e7d950 | 2007-02-05 14:26:28 -0800 | [diff] [blame] | 1230 | |
Trond Myklebust | 62ab460c | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 1231 | save_cache_validity = nfsi->cache_validity; |
| 1232 | nfsi->cache_validity &= ~(NFS_INO_INVALID_ATTR |
| 1233 | | NFS_INO_INVALID_ATIME |
| 1234 | | NFS_INO_REVAL_FORCED |
| 1235 | | NFS_INO_REVAL_PAGECACHE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1236 | |
Trond Myklebust | a895b4a | 2006-01-03 09:55:40 +0100 | [diff] [blame] | 1237 | /* Do atomic weak cache consistency updates */ |
Trond Myklebust | 27dc1cd | 2011-01-25 15:28:21 -0500 | [diff] [blame] | 1238 | invalid |= nfs_wcc_update_inode(inode, fattr); |
Trond Myklebust | a895b4a | 2006-01-03 09:55:40 +0100 | [diff] [blame] | 1239 | |
Trond Myklebust | 47aabaa | 2007-09-27 15:57:24 -0400 | [diff] [blame] | 1240 | /* More cache consistency checks */ |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1241 | if (fattr->valid & NFS_ATTR_FATTR_CHANGE) { |
| 1242 | if (nfsi->change_attr != fattr->change_attr) { |
| 1243 | dprintk("NFS: change_attr change on server for file %s/%ld\n", |
| 1244 | inode->i_sb->s_id, inode->i_ino); |
| 1245 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
| 1246 | if (S_ISDIR(inode->i_mode)) |
| 1247 | nfs_force_lookup_revalidate(inode); |
| 1248 | nfsi->change_attr = fattr->change_attr; |
| 1249 | } |
Trond Myklebust | 62ab460c | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 1250 | } else if (server->caps & NFS_CAP_CHANGE_ATTR) |
| 1251 | invalid |= save_cache_validity; |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1252 | |
| 1253 | if (fattr->valid & NFS_ATTR_FATTR_MTIME) { |
Trond Myklebust | 47aabaa | 2007-09-27 15:57:24 -0400 | [diff] [blame] | 1254 | /* NFSv2/v3: Check if the mtime agrees */ |
| 1255 | if (!timespec_equal(&inode->i_mtime, &fattr->mtime)) { |
| 1256 | dprintk("NFS: mtime change on server for file %s/%ld\n", |
| 1257 | inode->i_sb->s_id, inode->i_ino); |
| 1258 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA; |
Trond Myklebust | bfc69a4 | 2007-10-15 18:18:29 -0400 | [diff] [blame] | 1259 | if (S_ISDIR(inode->i_mode)) |
| 1260 | nfs_force_lookup_revalidate(inode); |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1261 | memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime)); |
Trond Myklebust | 47aabaa | 2007-09-27 15:57:24 -0400 | [diff] [blame] | 1262 | } |
Trond Myklebust | 62ab460c | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 1263 | } else if (server->caps & NFS_CAP_MTIME) |
| 1264 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR |
| 1265 | | NFS_INO_INVALID_DATA |
| 1266 | | NFS_INO_REVAL_PAGECACHE |
| 1267 | | NFS_INO_REVAL_FORCED); |
| 1268 | |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1269 | if (fattr->valid & NFS_ATTR_FATTR_CTIME) { |
Trond Myklebust | 47aabaa | 2007-09-27 15:57:24 -0400 | [diff] [blame] | 1270 | /* If ctime has changed we should definitely clear access+acl caches */ |
NeilBrown | 37d9d76 | 2009-03-11 14:10:23 -0400 | [diff] [blame] | 1271 | if (!timespec_equal(&inode->i_ctime, &fattr->ctime)) { |
Trond Myklebust | 4704f0e | 2008-10-14 19:16:07 -0400 | [diff] [blame] | 1272 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
NeilBrown | 37d9d76 | 2009-03-11 14:10:23 -0400 | [diff] [blame] | 1273 | /* and probably clear data for a directory too as utimes can cause |
| 1274 | * havoc with our cache. |
| 1275 | */ |
| 1276 | if (S_ISDIR(inode->i_mode)) { |
| 1277 | invalid |= NFS_INO_INVALID_DATA; |
| 1278 | nfs_force_lookup_revalidate(inode); |
| 1279 | } |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1280 | memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime)); |
NeilBrown | 37d9d76 | 2009-03-11 14:10:23 -0400 | [diff] [blame] | 1281 | } |
Trond Myklebust | 62ab460c | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 1282 | } else if (server->caps & NFS_CAP_CTIME) |
| 1283 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR |
| 1284 | | NFS_INO_INVALID_ACCESS |
| 1285 | | NFS_INO_INVALID_ACL |
| 1286 | | NFS_INO_REVAL_FORCED); |
Trond Myklebust | 47aabaa | 2007-09-27 15:57:24 -0400 | [diff] [blame] | 1287 | |
Trond Myklebust | 951a143 | 2005-06-22 17:16:30 +0000 | [diff] [blame] | 1288 | /* Check if our cached file size is stale */ |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1289 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) { |
| 1290 | new_isize = nfs_size_to_loff_t(fattr->size); |
| 1291 | cur_isize = i_size_read(inode); |
| 1292 | if (new_isize != cur_isize) { |
| 1293 | /* Do we perhaps have any outstanding writes, or has |
| 1294 | * the file grown beyond our last write? */ |
| 1295 | if (nfsi->npages == 0 || new_isize > cur_isize) { |
| 1296 | i_size_write(inode, new_isize); |
| 1297 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA; |
| 1298 | } |
| 1299 | dprintk("NFS: isize change on server for file %s/%ld\n", |
| 1300 | inode->i_sb->s_id, inode->i_ino); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1301 | } |
Trond Myklebust | 62ab460c | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 1302 | } else |
| 1303 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR |
| 1304 | | NFS_INO_REVAL_PAGECACHE |
| 1305 | | NFS_INO_REVAL_FORCED); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1306 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1307 | |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1308 | if (fattr->valid & NFS_ATTR_FATTR_ATIME) |
| 1309 | memcpy(&inode->i_atime, &fattr->atime, sizeof(inode->i_atime)); |
Trond Myklebust | 62ab460c | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 1310 | else if (server->caps & NFS_CAP_ATIME) |
| 1311 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATIME |
| 1312 | | NFS_INO_REVAL_FORCED); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1313 | |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1314 | if (fattr->valid & NFS_ATTR_FATTR_MODE) { |
| 1315 | if ((inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) { |
Trond Myklebust | 9b4b351 | 2010-02-03 08:27:35 -0500 | [diff] [blame] | 1316 | umode_t newmode = inode->i_mode & S_IFMT; |
| 1317 | newmode |= fattr->mode & S_IALLUGO; |
| 1318 | inode->i_mode = newmode; |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1319 | 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] | 1320 | } |
Trond Myklebust | 62ab460c | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 1321 | } else if (server->caps & NFS_CAP_MODE) |
| 1322 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR |
| 1323 | | NFS_INO_INVALID_ACCESS |
| 1324 | | NFS_INO_INVALID_ACL |
| 1325 | | NFS_INO_REVAL_FORCED); |
| 1326 | |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1327 | if (fattr->valid & NFS_ATTR_FATTR_OWNER) { |
| 1328 | if (inode->i_uid != fattr->uid) { |
| 1329 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
| 1330 | inode->i_uid = fattr->uid; |
| 1331 | } |
Trond Myklebust | 62ab460c | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 1332 | } else if (server->caps & NFS_CAP_OWNER) |
| 1333 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR |
| 1334 | | NFS_INO_INVALID_ACCESS |
| 1335 | | NFS_INO_INVALID_ACL |
| 1336 | | NFS_INO_REVAL_FORCED); |
| 1337 | |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1338 | if (fattr->valid & NFS_ATTR_FATTR_GROUP) { |
| 1339 | if (inode->i_gid != fattr->gid) { |
| 1340 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
| 1341 | inode->i_gid = fattr->gid; |
| 1342 | } |
Trond Myklebust | 62ab460c | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 1343 | } else if (server->caps & NFS_CAP_OWNER_GROUP) |
| 1344 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR |
| 1345 | | NFS_INO_INVALID_ACCESS |
| 1346 | | NFS_INO_INVALID_ACL |
| 1347 | | NFS_INO_REVAL_FORCED); |
Trond Myklebust | 921615f | 2008-10-14 19:23:07 -0400 | [diff] [blame] | 1348 | |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1349 | if (fattr->valid & NFS_ATTR_FATTR_NLINK) { |
| 1350 | if (inode->i_nlink != fattr->nlink) { |
| 1351 | invalid |= NFS_INO_INVALID_ATTR; |
| 1352 | if (S_ISDIR(inode->i_mode)) |
| 1353 | invalid |= NFS_INO_INVALID_DATA; |
| 1354 | inode->i_nlink = fattr->nlink; |
| 1355 | } |
Trond Myklebust | 62ab460c | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 1356 | } else if (server->caps & NFS_CAP_NLINK) |
| 1357 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR |
| 1358 | | NFS_INO_REVAL_FORCED); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1359 | |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1360 | if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1361 | /* |
| 1362 | * report the blocks in 512byte units |
| 1363 | */ |
| 1364 | inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1365 | } |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1366 | if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED) |
| 1367 | inode->i_blocks = fattr->du.nfs2.blocks; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1368 | |
| 1369 | /* Update attrtimeo value if we're out of the unstable period */ |
| 1370 | if (invalid & NFS_INO_INVALID_ATTR) { |
Chuck Lever | 91d5b47 | 2006-03-20 13:44:14 -0500 | [diff] [blame] | 1371 | nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1372 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); |
Trond Myklebust | 3e7d950 | 2007-02-05 14:26:28 -0800 | [diff] [blame] | 1373 | nfsi->attrtimeo_timestamp = now; |
Trond Myklebust | 4704f0e | 2008-10-14 19:16:07 -0400 | [diff] [blame] | 1374 | nfsi->attr_gencount = nfs_inc_attr_generation_counter(); |
Trond Myklebust | 6d2b296 | 2007-10-01 18:57:50 -0400 | [diff] [blame] | 1375 | } else { |
Peter Staubach | 64672d5 | 2008-12-23 15:21:56 -0500 | [diff] [blame] | 1376 | 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] | 1377 | if ((nfsi->attrtimeo <<= 1) > NFS_MAXATTRTIMEO(inode)) |
| 1378 | nfsi->attrtimeo = NFS_MAXATTRTIMEO(inode); |
| 1379 | nfsi->attrtimeo_timestamp = now; |
| 1380 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1381 | } |
Trond Myklebust | f2115dc | 2007-08-15 12:49:17 -0400 | [diff] [blame] | 1382 | invalid &= ~NFS_INO_INVALID_ATTR; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1383 | /* Don't invalidate the data if we were to blame */ |
| 1384 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) |
| 1385 | || S_ISLNK(inode->i_mode))) |
| 1386 | invalid &= ~NFS_INO_INVALID_DATA; |
Trond Myklebust | 412c77c | 2007-07-03 16:10:55 -0400 | [diff] [blame] | 1387 | if (!nfs_have_delegation(inode, FMODE_READ) || |
Trond Myklebust | 62ab460c | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 1388 | (save_cache_validity & NFS_INO_REVAL_FORCED)) |
Chuck Lever | 5529680 | 2005-08-18 11:24:09 -0700 | [diff] [blame] | 1389 | nfsi->cache_validity |= invalid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1390 | |
| 1391 | return 0; |
| 1392 | out_changed: |
| 1393 | /* |
| 1394 | * Big trouble! The inode has become a different object. |
| 1395 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1396 | printk(KERN_DEBUG "%s: inode %ld mode changed, %07o to %07o\n", |
Harvey Harrison | 3110ff8 | 2008-05-02 13:42:44 -0700 | [diff] [blame] | 1397 | __func__, inode->i_ino, inode->i_mode, fattr->mode); |
Trond Myklebust | b37b03b | 2005-11-25 17:10:06 -0500 | [diff] [blame] | 1398 | out_err: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1399 | /* |
| 1400 | * No need to worry about unhashing the dentry, as the |
| 1401 | * lookup validation will know that the inode is bad. |
| 1402 | * (But we fall through to invalidate the caches.) |
| 1403 | */ |
| 1404 | nfs_invalidate_inode(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1405 | return -ESTALE; |
Chuck Lever | 325cfed | 2005-11-30 18:08:55 -0500 | [diff] [blame] | 1406 | |
| 1407 | out_fileid: |
| 1408 | printk(KERN_ERR "NFS: server %s error: fileid changed\n" |
| 1409 | "fsid %s: expected fileid 0x%Lx, got 0x%Lx\n", |
David Howells | 54ceac4 | 2006-08-22 20:06:13 -0400 | [diff] [blame] | 1410 | NFS_SERVER(inode)->nfs_client->cl_hostname, inode->i_sb->s_id, |
Chuck Lever | 325cfed | 2005-11-30 18:08:55 -0500 | [diff] [blame] | 1411 | (long long)nfsi->fileid, (long long)fattr->fileid); |
| 1412 | goto out_err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1413 | } |
| 1414 | |
Trond Myklebust | 55a9759 | 2006-06-09 09:34:19 -0400 | [diff] [blame] | 1415 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1416 | #ifdef CONFIG_NFS_V4 |
| 1417 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1418 | /* |
| 1419 | * Clean out any remaining NFSv4 state that might be left over due |
| 1420 | * to open() calls that passed nfs_atomic_lookup, but failed to call |
| 1421 | * nfs_open(). |
| 1422 | */ |
Al Viro | b57922d | 2010-06-07 14:34:48 -0400 | [diff] [blame] | 1423 | void nfs4_evict_inode(struct inode *inode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1424 | { |
Fred Isaman | 4541d16 | 2011-01-06 11:36:23 +0000 | [diff] [blame] | 1425 | pnfs_destroy_layout(NFS_I(inode)); |
Al Viro | b57922d | 2010-06-07 14:34:48 -0400 | [diff] [blame] | 1426 | truncate_inode_pages(&inode->i_data, 0); |
| 1427 | end_writeback(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1428 | /* If we are holding a delegation, return it! */ |
Trond Myklebust | e6f8107 | 2008-01-24 18:14:34 -0500 | [diff] [blame] | 1429 | nfs_inode_return_delegation_noreclaim(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1430 | /* First call standard NFS clear_inode() code */ |
| 1431 | nfs_clear_inode(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1432 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1433 | #endif |
| 1434 | |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 1435 | struct inode *nfs_alloc_inode(struct super_block *sb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1436 | { |
| 1437 | struct nfs_inode *nfsi; |
Christoph Lameter | e94b176 | 2006-12-06 20:33:17 -0800 | [diff] [blame] | 1438 | nfsi = (struct nfs_inode *)kmem_cache_alloc(nfs_inode_cachep, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1439 | if (!nfsi) |
| 1440 | return NULL; |
Chuck Lever | 5529680 | 2005-08-18 11:24:09 -0700 | [diff] [blame] | 1441 | nfsi->flags = 0UL; |
| 1442 | nfsi->cache_validity = 0UL; |
Trond Myklebust | 458818e | 2005-06-22 17:16:27 +0000 | [diff] [blame] | 1443 | #ifdef CONFIG_NFS_V3_ACL |
| 1444 | nfsi->acl_access = ERR_PTR(-EAGAIN); |
| 1445 | nfsi->acl_default = ERR_PTR(-EAGAIN); |
| 1446 | #endif |
J. Bruce Fields | e50a1c2 | 2005-06-22 17:16:23 +0000 | [diff] [blame] | 1447 | #ifdef CONFIG_NFS_V4 |
| 1448 | nfsi->nfs4_acl = NULL; |
| 1449 | #endif /* CONFIG_NFS_V4 */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1450 | return &nfsi->vfs_inode; |
| 1451 | } |
| 1452 | |
Nick Piggin | fa0d7e3d | 2011-01-07 17:49:49 +1100 | [diff] [blame] | 1453 | static void nfs_i_callback(struct rcu_head *head) |
| 1454 | { |
| 1455 | struct inode *inode = container_of(head, struct inode, i_rcu); |
| 1456 | INIT_LIST_HEAD(&inode->i_dentry); |
| 1457 | kmem_cache_free(nfs_inode_cachep, NFS_I(inode)); |
| 1458 | } |
| 1459 | |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 1460 | void nfs_destroy_inode(struct inode *inode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1461 | { |
Nick Piggin | fa0d7e3d | 2011-01-07 17:49:49 +1100 | [diff] [blame] | 1462 | call_rcu(&inode->i_rcu, nfs_i_callback); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1463 | } |
| 1464 | |
Andrew Morton | d75d541 | 2006-06-25 02:41:26 -0700 | [diff] [blame] | 1465 | static inline void nfs4_init_once(struct nfs_inode *nfsi) |
| 1466 | { |
| 1467 | #ifdef CONFIG_NFS_V4 |
| 1468 | INIT_LIST_HEAD(&nfsi->open_states); |
| 1469 | nfsi->delegation = NULL; |
| 1470 | nfsi->delegation_state = 0; |
| 1471 | init_rwsem(&nfsi->rwsem); |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 1472 | nfsi->layout = NULL; |
Andrew Morton | d75d541 | 2006-06-25 02:41:26 -0700 | [diff] [blame] | 1473 | #endif |
| 1474 | } |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 1475 | |
Alexey Dobriyan | 51cc506 | 2008-07-25 19:45:34 -0700 | [diff] [blame] | 1476 | static void init_once(void *foo) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1477 | { |
| 1478 | struct nfs_inode *nfsi = (struct nfs_inode *) foo; |
| 1479 | |
Christoph Lameter | a35afb8 | 2007-05-16 22:10:57 -0700 | [diff] [blame] | 1480 | inode_init_once(&nfsi->vfs_inode); |
Christoph Lameter | a35afb8 | 2007-05-16 22:10:57 -0700 | [diff] [blame] | 1481 | INIT_LIST_HEAD(&nfsi->open_files); |
| 1482 | INIT_LIST_HEAD(&nfsi->access_cache_entry_lru); |
| 1483 | INIT_LIST_HEAD(&nfsi->access_cache_inode_lru); |
| 1484 | INIT_RADIX_TREE(&nfsi->nfs_page_tree, GFP_ATOMIC); |
Christoph Lameter | a35afb8 | 2007-05-16 22:10:57 -0700 | [diff] [blame] | 1485 | nfsi->npages = 0; |
Trond Myklebust | ff778d0 | 2010-02-19 16:53:39 -0800 | [diff] [blame] | 1486 | nfsi->ncommit = 0; |
Trond Myklebust | 565277f | 2007-10-15 18:17:53 -0400 | [diff] [blame] | 1487 | atomic_set(&nfsi->silly_count, 1); |
| 1488 | INIT_HLIST_HEAD(&nfsi->silly_list); |
| 1489 | init_waitqueue_head(&nfsi->waitqueue); |
Christoph Lameter | a35afb8 | 2007-05-16 22:10:57 -0700 | [diff] [blame] | 1490 | nfs4_init_once(nfsi); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1491 | } |
Paul Mundt | 20c2df8 | 2007-07-20 10:11:58 +0900 | [diff] [blame] | 1492 | |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 1493 | static int __init nfs_init_inodecache(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1494 | { |
| 1495 | nfs_inode_cachep = kmem_cache_create("nfs_inode_cache", |
| 1496 | sizeof(struct nfs_inode), |
Paul Jackson | fffb60f | 2006-03-24 03:16:06 -0800 | [diff] [blame] | 1497 | 0, (SLAB_RECLAIM_ACCOUNT| |
| 1498 | SLAB_MEM_SPREAD), |
Paul Mundt | 20c2df8 | 2007-07-20 10:11:58 +0900 | [diff] [blame] | 1499 | init_once); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1500 | if (nfs_inode_cachep == NULL) |
| 1501 | return -ENOMEM; |
| 1502 | |
| 1503 | return 0; |
| 1504 | } |
| 1505 | |
David Brownell | 266bee8 | 2006-06-27 12:59:15 -0700 | [diff] [blame] | 1506 | static void nfs_destroy_inodecache(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1507 | { |
Alexey Dobriyan | 1a1d92c | 2006-09-27 01:49:40 -0700 | [diff] [blame] | 1508 | kmem_cache_destroy(nfs_inode_cachep); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1509 | } |
| 1510 | |
Trond Myklebust | 5746006 | 2008-02-19 20:04:22 -0500 | [diff] [blame] | 1511 | struct workqueue_struct *nfsiod_workqueue; |
| 1512 | |
| 1513 | /* |
| 1514 | * start up the nfsiod workqueue |
| 1515 | */ |
| 1516 | static int nfsiod_start(void) |
| 1517 | { |
| 1518 | struct workqueue_struct *wq; |
| 1519 | dprintk("RPC: creating workqueue nfsiod\n"); |
Trond Myklebust | 6095889 | 2010-09-21 16:55:31 -0400 | [diff] [blame] | 1520 | wq = alloc_workqueue("nfsiod", WQ_RESCUER, 0); |
Trond Myklebust | 5746006 | 2008-02-19 20:04:22 -0500 | [diff] [blame] | 1521 | if (wq == NULL) |
| 1522 | return -ENOMEM; |
| 1523 | nfsiod_workqueue = wq; |
| 1524 | return 0; |
| 1525 | } |
| 1526 | |
| 1527 | /* |
| 1528 | * Destroy the nfsiod workqueue |
| 1529 | */ |
| 1530 | static void nfsiod_stop(void) |
| 1531 | { |
| 1532 | struct workqueue_struct *wq; |
| 1533 | |
| 1534 | wq = nfsiod_workqueue; |
| 1535 | if (wq == NULL) |
| 1536 | return; |
| 1537 | nfsiod_workqueue = NULL; |
| 1538 | destroy_workqueue(wq); |
| 1539 | } |
| 1540 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1541 | /* |
| 1542 | * Initialize NFS |
| 1543 | */ |
| 1544 | static int __init init_nfs_fs(void) |
| 1545 | { |
| 1546 | int err; |
| 1547 | |
Bryan Schumaker | 955a857 | 2010-09-29 15:41:49 -0400 | [diff] [blame] | 1548 | err = nfs_idmap_init(); |
| 1549 | if (err < 0) |
| 1550 | goto out9; |
| 1551 | |
Trond Myklebust | e571cbf | 2009-08-19 18:12:27 -0400 | [diff] [blame] | 1552 | err = nfs_dns_resolver_init(); |
| 1553 | if (err < 0) |
| 1554 | goto out8; |
| 1555 | |
David Howells | 8ec442a | 2009-04-03 16:42:42 +0100 | [diff] [blame] | 1556 | err = nfs_fscache_register(); |
| 1557 | if (err < 0) |
| 1558 | goto out7; |
| 1559 | |
Trond Myklebust | 5746006 | 2008-02-19 20:04:22 -0500 | [diff] [blame] | 1560 | err = nfsiod_start(); |
| 1561 | if (err) |
| 1562 | goto out6; |
| 1563 | |
David Howells | 6aaca56 | 2006-08-22 20:06:13 -0400 | [diff] [blame] | 1564 | err = nfs_fs_proc_init(); |
| 1565 | if (err) |
| 1566 | goto out5; |
| 1567 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1568 | err = nfs_init_nfspagecache(); |
| 1569 | if (err) |
| 1570 | goto out4; |
| 1571 | |
| 1572 | err = nfs_init_inodecache(); |
| 1573 | if (err) |
| 1574 | goto out3; |
| 1575 | |
| 1576 | err = nfs_init_readpagecache(); |
| 1577 | if (err) |
| 1578 | goto out2; |
| 1579 | |
| 1580 | err = nfs_init_writepagecache(); |
| 1581 | if (err) |
| 1582 | goto out1; |
| 1583 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1584 | err = nfs_init_directcache(); |
| 1585 | if (err) |
| 1586 | goto out0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1587 | |
| 1588 | #ifdef CONFIG_PROC_FS |
| 1589 | rpc_proc_register(&nfs_rpcstat); |
| 1590 | #endif |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 1591 | if ((err = register_nfs_fs()) != 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1592 | goto out; |
| 1593 | return 0; |
| 1594 | out: |
| 1595 | #ifdef CONFIG_PROC_FS |
| 1596 | rpc_proc_unregister("nfs"); |
| 1597 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1598 | nfs_destroy_directcache(); |
Chuck Lever | 6b59a75 | 2005-11-30 18:08:19 -0500 | [diff] [blame] | 1599 | out0: |
Chuck Lever | 6b59a75 | 2005-11-30 18:08:19 -0500 | [diff] [blame] | 1600 | nfs_destroy_writepagecache(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1601 | out1: |
| 1602 | nfs_destroy_readpagecache(); |
| 1603 | out2: |
| 1604 | nfs_destroy_inodecache(); |
| 1605 | out3: |
| 1606 | nfs_destroy_nfspagecache(); |
| 1607 | out4: |
David Howells | 6aaca56 | 2006-08-22 20:06:13 -0400 | [diff] [blame] | 1608 | nfs_fs_proc_exit(); |
| 1609 | out5: |
Trond Myklebust | 5746006 | 2008-02-19 20:04:22 -0500 | [diff] [blame] | 1610 | nfsiod_stop(); |
| 1611 | out6: |
David Howells | 8ec442a | 2009-04-03 16:42:42 +0100 | [diff] [blame] | 1612 | nfs_fscache_unregister(); |
| 1613 | out7: |
Trond Myklebust | e571cbf | 2009-08-19 18:12:27 -0400 | [diff] [blame] | 1614 | nfs_dns_resolver_destroy(); |
| 1615 | out8: |
Bryan Schumaker | 955a857 | 2010-09-29 15:41:49 -0400 | [diff] [blame] | 1616 | nfs_idmap_quit(); |
| 1617 | out9: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1618 | return err; |
| 1619 | } |
| 1620 | |
| 1621 | static void __exit exit_nfs_fs(void) |
| 1622 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1623 | nfs_destroy_directcache(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1624 | nfs_destroy_writepagecache(); |
| 1625 | nfs_destroy_readpagecache(); |
| 1626 | nfs_destroy_inodecache(); |
| 1627 | nfs_destroy_nfspagecache(); |
David Howells | 8ec442a | 2009-04-03 16:42:42 +0100 | [diff] [blame] | 1628 | nfs_fscache_unregister(); |
Trond Myklebust | e571cbf | 2009-08-19 18:12:27 -0400 | [diff] [blame] | 1629 | nfs_dns_resolver_destroy(); |
Bryan Schumaker | 955a857 | 2010-09-29 15:41:49 -0400 | [diff] [blame] | 1630 | nfs_idmap_quit(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1631 | #ifdef CONFIG_PROC_FS |
| 1632 | rpc_proc_unregister("nfs"); |
| 1633 | #endif |
Andy Adamson | f4eecd5 | 2011-01-06 02:04:30 +0000 | [diff] [blame] | 1634 | nfs_cleanup_cb_ident_idr(); |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 1635 | unregister_nfs_fs(); |
David Howells | 6aaca56 | 2006-08-22 20:06:13 -0400 | [diff] [blame] | 1636 | nfs_fs_proc_exit(); |
Trond Myklebust | 5746006 | 2008-02-19 20:04:22 -0500 | [diff] [blame] | 1637 | nfsiod_stop(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1638 | } |
| 1639 | |
| 1640 | /* Not quite true; I just maintain it */ |
| 1641 | MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>"); |
| 1642 | MODULE_LICENSE("GPL"); |
Trond Myklebust | f43bf0b | 2007-10-09 12:01:04 -0400 | [diff] [blame] | 1643 | module_param(enable_ino64, bool, 0644); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1644 | |
| 1645 | module_init(init_nfs_fs) |
| 1646 | module_exit(exit_nfs_fs) |