Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * linux/fs/nfs/inode.c |
| 3 | * |
| 4 | * Copyright (C) 1992 Rick Sladkey |
| 5 | * |
| 6 | * nfs inode and superblock handling functions |
| 7 | * |
| 8 | * Modularised by Alan Cox <Alan.Cox@linux.org>, while hacking some |
| 9 | * experimental NFS changes. Modularisation taken straight from SYS5 fs. |
| 10 | * |
| 11 | * Change to nfs_read_super() to permit NFS mounts to multi-homed hosts. |
| 12 | * J.S.Peatfield@damtp.cam.ac.uk |
| 13 | * |
| 14 | */ |
| 15 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 16 | #include <linux/module.h> |
| 17 | #include <linux/init.h> |
Alexey Dobriyan | e8edc6e | 2007-05-21 01:22:52 +0400 | [diff] [blame] | 18 | #include <linux/sched.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 19 | #include <linux/time.h> |
| 20 | #include <linux/kernel.h> |
| 21 | #include <linux/mm.h> |
| 22 | #include <linux/string.h> |
| 23 | #include <linux/stat.h> |
| 24 | #include <linux/errno.h> |
| 25 | #include <linux/unistd.h> |
| 26 | #include <linux/sunrpc/clnt.h> |
| 27 | #include <linux/sunrpc/stats.h> |
Chuck Lever | 4ece3a2 | 2006-03-20 13:44:22 -0500 | [diff] [blame] | 28 | #include <linux/sunrpc/metrics.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 29 | #include <linux/nfs_fs.h> |
| 30 | #include <linux/nfs_mount.h> |
| 31 | #include <linux/nfs4_mount.h> |
| 32 | #include <linux/lockd/bind.h> |
| 33 | #include <linux/smp_lock.h> |
| 34 | #include <linux/seq_file.h> |
| 35 | #include <linux/mount.h> |
| 36 | #include <linux/nfs_idmap.h> |
| 37 | #include <linux/vfs.h> |
Manoj Naik | 9cdb388 | 2006-06-09 09:34:28 -0400 | [diff] [blame] | 38 | #include <linux/inet.h> |
| 39 | #include <linux/nfs_xdr.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | |
| 41 | #include <asm/system.h> |
| 42 | #include <asm/uaccess.h> |
| 43 | |
Trond Myklebust | 4ce7971 | 2005-06-22 17:16:21 +0000 | [diff] [blame] | 44 | #include "nfs4_fs.h" |
Trond Myklebust | a72b442 | 2006-01-03 09:55:41 +0100 | [diff] [blame] | 45 | #include "callback.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 46 | #include "delegation.h" |
Chuck Lever | d9ef5a8 | 2006-03-20 13:44:13 -0500 | [diff] [blame] | 47 | #include "iostat.h" |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 48 | #include "internal.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | |
| 50 | #define NFSDBG_FACILITY NFSDBG_VFS |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 51 | |
Trond Myklebust | f43bf0b | 2007-10-09 12:01:04 -0400 | [diff] [blame] | 52 | #define NFS_64_BIT_INODE_NUMBERS_ENABLED 1 |
| 53 | |
| 54 | /* Default is to see 64-bit inode numbers */ |
| 55 | static int enable_ino64 = NFS_64_BIT_INODE_NUMBERS_ENABLED; |
| 56 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 57 | static void nfs_invalidate_inode(struct inode *); |
Trond Myklebust | 24aa1fe | 2005-12-03 15:20:07 -0500 | [diff] [blame] | 58 | static int nfs_update_inode(struct inode *, struct nfs_fattr *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 59 | |
Trond Myklebust | ada70d9 | 2005-06-22 17:16:22 +0000 | [diff] [blame] | 60 | static void nfs_zap_acl_cache(struct inode *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 61 | |
Christoph Lameter | e18b890 | 2006-12-06 20:33:20 -0800 | [diff] [blame] | 62 | static struct kmem_cache * nfs_inode_cachep; |
Andreas Gruenbacher | b7fa055 | 2005-06-22 17:16:27 +0000 | [diff] [blame] | 63 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 64 | static inline unsigned long |
| 65 | nfs_fattr_to_ino_t(struct nfs_fattr *fattr) |
| 66 | { |
| 67 | return nfs_fileid_to_ino_t(fattr->fileid); |
| 68 | } |
| 69 | |
Trond Myklebust | f43bf0b | 2007-10-09 12:01:04 -0400 | [diff] [blame] | 70 | /** |
| 71 | * nfs_compat_user_ino64 - returns the user-visible inode number |
| 72 | * @fileid: 64-bit fileid |
| 73 | * |
| 74 | * This function returns a 32-bit inode number if the boot parameter |
| 75 | * nfs.enable_ino64 is zero. |
| 76 | */ |
| 77 | u64 nfs_compat_user_ino64(u64 fileid) |
| 78 | { |
| 79 | int ino; |
| 80 | |
| 81 | if (enable_ino64) |
| 82 | return fileid; |
| 83 | ino = fileid; |
| 84 | if (sizeof(ino) < sizeof(fileid)) |
| 85 | ino ^= fileid >> (sizeof(fileid)-sizeof(ino)) * 8; |
| 86 | return ino; |
| 87 | } |
| 88 | |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 89 | int nfs_write_inode(struct inode *inode, int sync) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 90 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 91 | int ret; |
| 92 | |
Trond Myklebust | d30c834 | 2006-12-13 15:23:47 -0500 | [diff] [blame] | 93 | if (sync) { |
| 94 | ret = filemap_fdatawait(inode->i_mapping); |
| 95 | if (ret == 0) |
| 96 | ret = nfs_commit_inode(inode, FLUSH_SYNC); |
| 97 | } else |
| 98 | ret = nfs_commit_inode(inode, 0); |
| 99 | if (ret >= 0) |
| 100 | return 0; |
| 101 | __mark_inode_dirty(inode, I_DIRTY_DATASYNC); |
| 102 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 103 | } |
| 104 | |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 105 | void nfs_clear_inode(struct inode *inode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 106 | { |
Trond Myklebust | da6d503 | 2006-06-01 17:26:35 -0400 | [diff] [blame] | 107 | /* |
| 108 | * The following should never happen... |
| 109 | */ |
| 110 | BUG_ON(nfs_have_writebacks(inode)); |
Trond Myklebust | 1c3c07e | 2006-07-25 11:28:18 -0400 | [diff] [blame] | 111 | BUG_ON(!list_empty(&NFS_I(inode)->open_files)); |
Trond Myklebust | ada70d9 | 2005-06-22 17:16:22 +0000 | [diff] [blame] | 112 | nfs_zap_acl_cache(inode); |
Trond Myklebust | 1c3c07e | 2006-07-25 11:28:18 -0400 | [diff] [blame] | 113 | nfs_access_zap_cache(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 114 | } |
| 115 | |
Trond Myklebust | 29884df | 2005-12-13 16:13:54 -0500 | [diff] [blame] | 116 | /** |
| 117 | * nfs_sync_mapping - helper to flush all mmapped dirty data to disk |
| 118 | */ |
| 119 | int nfs_sync_mapping(struct address_space *mapping) |
| 120 | { |
| 121 | int ret; |
| 122 | |
| 123 | if (mapping->nrpages == 0) |
| 124 | return 0; |
| 125 | unmap_mapping_range(mapping, 0, 0, 0); |
OGAWA Hirofumi | 28fd129 | 2006-01-08 01:02:14 -0800 | [diff] [blame] | 126 | ret = filemap_write_and_wait(mapping); |
Trond Myklebust | 29884df | 2005-12-13 16:13:54 -0500 | [diff] [blame] | 127 | if (ret != 0) |
| 128 | goto out; |
| 129 | ret = nfs_wb_all(mapping->host); |
| 130 | out: |
| 131 | return ret; |
| 132 | } |
| 133 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 134 | /* |
| 135 | * Invalidate the local caches |
| 136 | */ |
Trond Myklebust | b37b03b | 2005-11-25 17:10:06 -0500 | [diff] [blame] | 137 | static void nfs_zap_caches_locked(struct inode *inode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 138 | { |
| 139 | struct nfs_inode *nfsi = NFS_I(inode); |
| 140 | int mode = inode->i_mode; |
| 141 | |
Chuck Lever | 91d5b47 | 2006-03-20 13:44:14 -0500 | [diff] [blame] | 142 | nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE); |
| 143 | |
Trond Myklebust | c7c2097 | 2007-09-28 19:22:40 -0400 | [diff] [blame] | 144 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); |
| 145 | nfsi->attrtimeo_timestamp = jiffies; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 146 | |
| 147 | memset(NFS_COOKIEVERF(inode), 0, sizeof(NFS_COOKIEVERF(inode))); |
| 148 | if (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode)) |
Chuck Lever | 5529680 | 2005-08-18 11:24:09 -0700 | [diff] [blame] | 149 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL|NFS_INO_REVAL_PAGECACHE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 150 | else |
Chuck Lever | 5529680 | 2005-08-18 11:24:09 -0700 | [diff] [blame] | 151 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL|NFS_INO_REVAL_PAGECACHE; |
Trond Myklebust | b37b03b | 2005-11-25 17:10:06 -0500 | [diff] [blame] | 152 | } |
Chuck Lever | dc59250 | 2005-08-18 11:24:12 -0700 | [diff] [blame] | 153 | |
Trond Myklebust | b37b03b | 2005-11-25 17:10:06 -0500 | [diff] [blame] | 154 | void nfs_zap_caches(struct inode *inode) |
| 155 | { |
| 156 | spin_lock(&inode->i_lock); |
| 157 | nfs_zap_caches_locked(inode); |
Chuck Lever | dc59250 | 2005-08-18 11:24:12 -0700 | [diff] [blame] | 158 | spin_unlock(&inode->i_lock); |
Trond Myklebust | ada70d9 | 2005-06-22 17:16:22 +0000 | [diff] [blame] | 159 | } |
| 160 | |
Trond Myklebust | cd9ae2b | 2006-10-19 23:28:40 -0700 | [diff] [blame] | 161 | void nfs_zap_mapping(struct inode *inode, struct address_space *mapping) |
| 162 | { |
| 163 | if (mapping->nrpages != 0) { |
| 164 | spin_lock(&inode->i_lock); |
| 165 | NFS_I(inode)->cache_validity |= NFS_INO_INVALID_DATA; |
| 166 | spin_unlock(&inode->i_lock); |
| 167 | } |
| 168 | } |
| 169 | |
Trond Myklebust | ada70d9 | 2005-06-22 17:16:22 +0000 | [diff] [blame] | 170 | static void nfs_zap_acl_cache(struct inode *inode) |
| 171 | { |
| 172 | void (*clear_acl_cache)(struct inode *); |
| 173 | |
| 174 | clear_acl_cache = NFS_PROTO(inode)->clear_acl_cache; |
| 175 | if (clear_acl_cache != NULL) |
| 176 | clear_acl_cache(inode); |
Chuck Lever | dc59250 | 2005-08-18 11:24:12 -0700 | [diff] [blame] | 177 | spin_lock(&inode->i_lock); |
Chuck Lever | 5529680 | 2005-08-18 11:24:09 -0700 | [diff] [blame] | 178 | NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_ACL; |
Chuck Lever | dc59250 | 2005-08-18 11:24:12 -0700 | [diff] [blame] | 179 | spin_unlock(&inode->i_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 180 | } |
| 181 | |
Trond Myklebust | c481299 | 2007-09-28 17:11:45 -0400 | [diff] [blame] | 182 | void nfs_invalidate_atime(struct inode *inode) |
| 183 | { |
| 184 | spin_lock(&inode->i_lock); |
| 185 | NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATIME; |
| 186 | spin_unlock(&inode->i_lock); |
| 187 | } |
| 188 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 189 | /* |
Trond Myklebust | b37b03b | 2005-11-25 17:10:06 -0500 | [diff] [blame] | 190 | * Invalidate, but do not unhash, the inode. |
| 191 | * NB: must be called with inode->i_lock held! |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 192 | */ |
Trond Myklebust | b37b03b | 2005-11-25 17:10:06 -0500 | [diff] [blame] | 193 | static void nfs_invalidate_inode(struct inode *inode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 194 | { |
Benny Halevy | 3a10c30 | 2008-01-23 08:58:59 +0200 | [diff] [blame] | 195 | set_bit(NFS_INO_STALE, &NFS_I(inode)->flags); |
Trond Myklebust | b37b03b | 2005-11-25 17:10:06 -0500 | [diff] [blame] | 196 | nfs_zap_caches_locked(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 197 | } |
| 198 | |
| 199 | struct nfs_find_desc { |
| 200 | struct nfs_fh *fh; |
| 201 | struct nfs_fattr *fattr; |
| 202 | }; |
| 203 | |
| 204 | /* |
| 205 | * In NFSv3 we can have 64bit inode numbers. In order to support |
| 206 | * this, and re-exported directories (also seen in NFSv2) |
| 207 | * we are forced to allow 2 different inodes to have the same |
| 208 | * i_ino. |
| 209 | */ |
| 210 | static int |
| 211 | nfs_find_actor(struct inode *inode, void *opaque) |
| 212 | { |
| 213 | struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque; |
| 214 | struct nfs_fh *fh = desc->fh; |
| 215 | struct nfs_fattr *fattr = desc->fattr; |
| 216 | |
| 217 | if (NFS_FILEID(inode) != fattr->fileid) |
| 218 | return 0; |
| 219 | if (nfs_compare_fh(NFS_FH(inode), fh)) |
| 220 | return 0; |
| 221 | if (is_bad_inode(inode) || NFS_STALE(inode)) |
| 222 | return 0; |
| 223 | return 1; |
| 224 | } |
| 225 | |
| 226 | static int |
| 227 | nfs_init_locked(struct inode *inode, void *opaque) |
| 228 | { |
| 229 | struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque; |
| 230 | struct nfs_fattr *fattr = desc->fattr; |
| 231 | |
Benny Halevy | 99fadcd | 2008-01-23 08:59:08 +0200 | [diff] [blame] | 232 | set_nfs_fileid(inode, fattr->fileid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 233 | nfs_copy_fh(NFS_FH(inode), desc->fh); |
| 234 | return 0; |
| 235 | } |
| 236 | |
| 237 | /* Don't use READDIRPLUS on directories that we believe are too large */ |
| 238 | #define NFS_LIMIT_READDIRPLUS (8*PAGE_SIZE) |
| 239 | |
| 240 | /* |
| 241 | * This is our front-end to iget that looks up inodes by file handle |
| 242 | * instead of inode number. |
| 243 | */ |
| 244 | struct inode * |
| 245 | nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr) |
| 246 | { |
| 247 | struct nfs_find_desc desc = { |
| 248 | .fh = fh, |
| 249 | .fattr = fattr |
| 250 | }; |
Trond Myklebust | 03f28e3 | 2006-03-20 13:44:48 -0500 | [diff] [blame] | 251 | struct inode *inode = ERR_PTR(-ENOENT); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 252 | unsigned long hash; |
| 253 | |
| 254 | if ((fattr->valid & NFS_ATTR_FATTR) == 0) |
| 255 | goto out_no_inode; |
| 256 | |
| 257 | if (!fattr->nlink) { |
| 258 | printk("NFS: Buggy server - nlink == 0!\n"); |
| 259 | goto out_no_inode; |
| 260 | } |
| 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; |
| 281 | /* Why so? Because we want revalidate for devices/FIFOs, and |
| 282 | * that's precisely what we have in nfs_file_inode_operations. |
| 283 | */ |
David Howells | 8fa5c00 | 2006-08-22 20:06:12 -0400 | [diff] [blame] | 284 | 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] | 285 | if (S_ISREG(inode->i_mode)) { |
| 286 | inode->i_fop = &nfs_file_operations; |
| 287 | inode->i_data.a_ops = &nfs_file_aops; |
| 288 | inode->i_data.backing_dev_info = &NFS_SB(sb)->backing_dev_info; |
| 289 | } else if (S_ISDIR(inode->i_mode)) { |
David Howells | 8fa5c00 | 2006-08-22 20:06:12 -0400 | [diff] [blame] | 290 | 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] | 291 | inode->i_fop = &nfs_dir_operations; |
| 292 | if (nfs_server_capable(inode, NFS_CAP_READDIRPLUS) |
| 293 | && fattr->size <= NFS_LIMIT_READDIRPLUS) |
Benny Halevy | 3a10c30 | 2008-01-23 08:58:59 +0200 | [diff] [blame] | 294 | set_bit(NFS_INO_ADVISE_RDPLUS, &NFS_I(inode)->flags); |
Trond Myklebust | 55a9759 | 2006-06-09 09:34:19 -0400 | [diff] [blame] | 295 | /* Deal with crossing mountpoints */ |
| 296 | if (!nfs_fsid_equal(&NFS_SB(sb)->fsid, &fattr->fsid)) { |
Manoj Naik | 6b97fd3 | 2006-06-09 09:34:29 -0400 | [diff] [blame] | 297 | if (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) |
| 298 | inode->i_op = &nfs_referral_inode_operations; |
| 299 | else |
| 300 | inode->i_op = &nfs_mountpoint_inode_operations; |
Trond Myklebust | 55a9759 | 2006-06-09 09:34:19 -0400 | [diff] [blame] | 301 | inode->i_fop = NULL; |
| 302 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 303 | } else if (S_ISLNK(inode->i_mode)) |
| 304 | inode->i_op = &nfs_symlink_inode_operations; |
| 305 | else |
| 306 | init_special_inode(inode, inode->i_mode, fattr->rdev); |
| 307 | |
Trond Myklebust | 3380114 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 308 | nfsi->read_cache_jiffies = fattr->time_start; |
Trond Myklebust | b0c4fdd | 2007-02-05 14:44:22 -0800 | [diff] [blame] | 309 | nfsi->last_updated = now; |
| 310 | nfsi->cache_change_attribute = now; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 311 | inode->i_atime = fattr->atime; |
| 312 | inode->i_mtime = fattr->mtime; |
| 313 | inode->i_ctime = fattr->ctime; |
| 314 | if (fattr->valid & NFS_ATTR_FATTR_V4) |
| 315 | nfsi->change_attr = fattr->change_attr; |
| 316 | inode->i_size = nfs_size_to_loff_t(fattr->size); |
| 317 | inode->i_nlink = fattr->nlink; |
| 318 | inode->i_uid = fattr->uid; |
| 319 | inode->i_gid = fattr->gid; |
| 320 | if (fattr->valid & (NFS_ATTR_FATTR_V3 | NFS_ATTR_FATTR_V4)) { |
| 321 | /* |
| 322 | * report the blocks in 512byte units |
| 323 | */ |
| 324 | inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 325 | } else { |
| 326 | inode->i_blocks = fattr->du.nfs2.blocks; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 327 | } |
| 328 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); |
Trond Myklebust | b0c4fdd | 2007-02-05 14:44:22 -0800 | [diff] [blame] | 329 | nfsi->attrtimeo_timestamp = now; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 330 | memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf)); |
Trond Myklebust | 1c3c07e | 2006-07-25 11:28:18 -0400 | [diff] [blame] | 331 | nfsi->access_cache = RB_ROOT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 332 | |
| 333 | unlock_new_inode(inode); |
| 334 | } else |
| 335 | nfs_refresh_inode(inode, fattr); |
| 336 | dprintk("NFS: nfs_fhget(%s/%Ld ct=%d)\n", |
| 337 | inode->i_sb->s_id, |
| 338 | (long long)NFS_FILEID(inode), |
| 339 | atomic_read(&inode->i_count)); |
| 340 | |
| 341 | out: |
| 342 | return inode; |
| 343 | |
| 344 | out_no_inode: |
Trond Myklebust | 03f28e3 | 2006-03-20 13:44:48 -0500 | [diff] [blame] | 345 | dprintk("nfs_fhget: iget failed with error %ld\n", PTR_ERR(inode)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 346 | goto out; |
| 347 | } |
| 348 | |
| 349 | #define NFS_VALID_ATTRS (ATTR_MODE|ATTR_UID|ATTR_GID|ATTR_SIZE|ATTR_ATIME|ATTR_ATIME_SET|ATTR_MTIME|ATTR_MTIME_SET) |
| 350 | |
| 351 | int |
| 352 | nfs_setattr(struct dentry *dentry, struct iattr *attr) |
| 353 | { |
| 354 | struct inode *inode = dentry->d_inode; |
| 355 | struct nfs_fattr fattr; |
| 356 | int error; |
| 357 | |
Chuck Lever | 91d5b47 | 2006-03-20 13:44:14 -0500 | [diff] [blame] | 358 | nfs_inc_stats(inode, NFSIOS_VFSSETATTR); |
| 359 | |
Jeff Layton | 188b95d | 2007-10-18 03:05:21 -0700 | [diff] [blame] | 360 | /* skip mode change if it's just for clearing setuid/setgid */ |
| 361 | if (attr->ia_valid & (ATTR_KILL_SUID | ATTR_KILL_SGID)) |
| 362 | attr->ia_valid &= ~ATTR_MODE; |
| 363 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 364 | if (attr->ia_valid & ATTR_SIZE) { |
| 365 | if (!S_ISREG(inode->i_mode) || attr->ia_size == i_size_read(inode)) |
| 366 | attr->ia_valid &= ~ATTR_SIZE; |
| 367 | } |
| 368 | |
| 369 | /* Optimization: if the end result is no change, don't RPC */ |
| 370 | attr->ia_valid &= NFS_VALID_ATTRS; |
| 371 | if (attr->ia_valid == 0) |
| 372 | return 0; |
| 373 | |
| 374 | lock_kernel(); |
Trond Myklebust | 755c1e2 | 2006-03-20 13:44:06 -0500 | [diff] [blame] | 375 | /* Write all dirty data */ |
Trond Myklebust | e1552e1 | 2007-04-14 19:07:28 -0400 | [diff] [blame] | 376 | if (S_ISREG(inode->i_mode)) { |
| 377 | filemap_write_and_wait(inode->i_mapping); |
| 378 | nfs_wb_all(inode); |
| 379 | } |
Trond Myklebust | 642ac54 | 2005-10-18 14:20:19 -0700 | [diff] [blame] | 380 | /* |
| 381 | * Return any delegations if we're going to change ACLs |
| 382 | */ |
| 383 | if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) |
| 384 | nfs_inode_return_delegation(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 385 | error = NFS_PROTO(inode)->setattr(dentry, &fattr, attr); |
Trond Myklebust | 65e4308 | 2005-08-16 11:49:44 -0400 | [diff] [blame] | 386 | if (error == 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 387 | nfs_refresh_inode(inode, &fattr); |
Trond Myklebust | 65e4308 | 2005-08-16 11:49:44 -0400 | [diff] [blame] | 388 | unlock_kernel(); |
| 389 | return error; |
| 390 | } |
| 391 | |
| 392 | /** |
| 393 | * nfs_setattr_update_inode - Update inode metadata after a setattr call. |
| 394 | * @inode: pointer to struct inode |
| 395 | * @attr: pointer to struct iattr |
| 396 | * |
| 397 | * Note: we do this in the *proc.c in order to ensure that |
| 398 | * it works for things like exclusive creates too. |
| 399 | */ |
| 400 | void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr) |
| 401 | { |
| 402 | if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 403 | if ((attr->ia_valid & ATTR_MODE) != 0) { |
Trond Myklebust | 65e4308 | 2005-08-16 11:49:44 -0400 | [diff] [blame] | 404 | int mode = attr->ia_mode & S_IALLUGO; |
| 405 | mode |= inode->i_mode & ~S_IALLUGO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 406 | inode->i_mode = mode; |
| 407 | } |
| 408 | if ((attr->ia_valid & ATTR_UID) != 0) |
| 409 | inode->i_uid = attr->ia_uid; |
| 410 | if ((attr->ia_valid & ATTR_GID) != 0) |
| 411 | inode->i_gid = attr->ia_gid; |
Chuck Lever | dc59250 | 2005-08-18 11:24:12 -0700 | [diff] [blame] | 412 | spin_lock(&inode->i_lock); |
Chuck Lever | 5529680 | 2005-08-18 11:24:09 -0700 | [diff] [blame] | 413 | 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] | 414 | spin_unlock(&inode->i_lock); |
Trond Myklebust | 65e4308 | 2005-08-16 11:49:44 -0400 | [diff] [blame] | 415 | } |
| 416 | if ((attr->ia_valid & ATTR_SIZE) != 0) { |
Chuck Lever | 91d5b47 | 2006-03-20 13:44:14 -0500 | [diff] [blame] | 417 | nfs_inc_stats(inode, NFSIOS_SETATTRTRUNC); |
Trond Myklebust | 65e4308 | 2005-08-16 11:49:44 -0400 | [diff] [blame] | 418 | inode->i_size = attr->ia_size; |
| 419 | vmtruncate(inode, attr->ia_size); |
| 420 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 421 | } |
| 422 | |
Chuck Lever | 412d582 | 2005-08-18 11:24:11 -0700 | [diff] [blame] | 423 | static int nfs_wait_schedule(void *word) |
| 424 | { |
| 425 | if (signal_pending(current)) |
| 426 | return -ERESTARTSYS; |
| 427 | schedule(); |
| 428 | return 0; |
| 429 | } |
| 430 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 431 | /* |
| 432 | * Wait for the inode to get unlocked. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 433 | */ |
Chuck Lever | 412d582 | 2005-08-18 11:24:11 -0700 | [diff] [blame] | 434 | static int nfs_wait_on_inode(struct inode *inode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 435 | { |
| 436 | struct rpc_clnt *clnt = NFS_CLIENT(inode); |
| 437 | struct nfs_inode *nfsi = NFS_I(inode); |
Chuck Lever | 412d582 | 2005-08-18 11:24:11 -0700 | [diff] [blame] | 438 | sigset_t oldmask; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 439 | int error; |
Chuck Lever | 412d582 | 2005-08-18 11:24:11 -0700 | [diff] [blame] | 440 | |
Chuck Lever | 412d582 | 2005-08-18 11:24:11 -0700 | [diff] [blame] | 441 | rpc_clnt_sigmask(clnt, &oldmask); |
| 442 | error = wait_on_bit_lock(&nfsi->flags, NFS_INO_REVALIDATING, |
| 443 | nfs_wait_schedule, TASK_INTERRUPTIBLE); |
| 444 | rpc_clnt_sigunmask(clnt, &oldmask); |
Chuck Lever | 412d582 | 2005-08-18 11:24:11 -0700 | [diff] [blame] | 445 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 446 | return error; |
| 447 | } |
| 448 | |
Chuck Lever | 412d582 | 2005-08-18 11:24:11 -0700 | [diff] [blame] | 449 | static void nfs_wake_up_inode(struct inode *inode) |
| 450 | { |
| 451 | struct nfs_inode *nfsi = NFS_I(inode); |
| 452 | |
| 453 | clear_bit(NFS_INO_REVALIDATING, &nfsi->flags); |
| 454 | smp_mb__after_clear_bit(); |
| 455 | wake_up_bit(&nfsi->flags, NFS_INO_REVALIDATING); |
| 456 | } |
| 457 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 458 | int nfs_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat) |
| 459 | { |
| 460 | struct inode *inode = dentry->d_inode; |
Chuck Lever | 5529680 | 2005-08-18 11:24:09 -0700 | [diff] [blame] | 461 | int need_atime = NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATIME; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 462 | int err; |
| 463 | |
Chuck Lever | 28c494c | 2007-10-26 13:32:13 -0400 | [diff] [blame] | 464 | /* |
| 465 | * Flush out writes to the server in order to update c/mtime. |
| 466 | * |
| 467 | * Hold the i_mutex to suspend application writes temporarily; |
| 468 | * this prevents long-running writing applications from blocking |
| 469 | * nfs_wb_nocommit. |
| 470 | */ |
| 471 | if (S_ISREG(inode->i_mode)) { |
| 472 | mutex_lock(&inode->i_mutex); |
Trond Myklebust | ed90ef5 | 2007-07-20 13:13:28 -0400 | [diff] [blame] | 473 | nfs_wb_nocommit(inode); |
Chuck Lever | 28c494c | 2007-10-26 13:32:13 -0400 | [diff] [blame] | 474 | mutex_unlock(&inode->i_mutex); |
| 475 | } |
Christoph Hellwig | fc33a7b | 2006-01-09 20:52:17 -0800 | [diff] [blame] | 476 | |
| 477 | /* |
| 478 | * We may force a getattr if the user cares about atime. |
| 479 | * |
| 480 | * Note that we only have to check the vfsmount flags here: |
| 481 | * - NFS always sets S_NOATIME by so checking it would give a |
| 482 | * bogus result |
| 483 | * - NFS never sets MS_NOATIME or MS_NODIRATIME so there is |
| 484 | * no point in checking those. |
| 485 | */ |
| 486 | if ((mnt->mnt_flags & MNT_NOATIME) || |
| 487 | ((mnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 488 | need_atime = 0; |
Christoph Hellwig | fc33a7b | 2006-01-09 20:52:17 -0800 | [diff] [blame] | 489 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 490 | if (need_atime) |
| 491 | err = __nfs_revalidate_inode(NFS_SERVER(inode), inode); |
| 492 | else |
| 493 | err = nfs_revalidate_inode(NFS_SERVER(inode), inode); |
Peter Staubach | 4e769b9 | 2007-08-03 15:07:10 -0400 | [diff] [blame] | 494 | if (!err) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 495 | generic_fillattr(inode, stat); |
Trond Myklebust | f43bf0b | 2007-10-09 12:01:04 -0400 | [diff] [blame] | 496 | stat->ino = nfs_compat_user_ino64(NFS_FILEID(inode)); |
Peter Staubach | 4e769b9 | 2007-08-03 15:07:10 -0400 | [diff] [blame] | 497 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 498 | return err; |
| 499 | } |
| 500 | |
Trond Myklebust | b92dccf | 2006-03-20 13:44:03 -0500 | [diff] [blame] | 501 | static struct nfs_open_context *alloc_nfs_open_context(struct vfsmount *mnt, struct dentry *dentry, struct rpc_cred *cred) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 502 | { |
| 503 | struct nfs_open_context *ctx; |
| 504 | |
Panagiotis Issaris | f52720c | 2006-09-27 01:49:39 -0700 | [diff] [blame] | 505 | ctx = kmalloc(sizeof(*ctx), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 506 | if (ctx != NULL) { |
Trond Myklebust | 88be9f9 | 2007-06-05 10:42:27 -0400 | [diff] [blame] | 507 | ctx->path.dentry = dget(dentry); |
| 508 | ctx->path.mnt = mntget(mnt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 509 | ctx->cred = get_rpccred(cred); |
| 510 | ctx->state = NULL; |
| 511 | ctx->lockowner = current->files; |
| 512 | ctx->error = 0; |
Olivier Galibert | 00a9264 | 2005-06-22 17:16:29 +0000 | [diff] [blame] | 513 | ctx->dir_cookie = 0; |
Trond Myklebust | 5e11934 | 2007-07-26 12:06:17 -0400 | [diff] [blame] | 514 | atomic_set(&ctx->count, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 515 | } |
| 516 | return ctx; |
| 517 | } |
| 518 | |
| 519 | struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx) |
| 520 | { |
| 521 | if (ctx != NULL) |
Trond Myklebust | 5e11934 | 2007-07-26 12:06:17 -0400 | [diff] [blame] | 522 | atomic_inc(&ctx->count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 523 | return ctx; |
| 524 | } |
| 525 | |
Trond Myklebust | a49c3c7 | 2007-10-18 18:03:27 -0400 | [diff] [blame] | 526 | static void __put_nfs_open_context(struct nfs_open_context *ctx, int wait) |
Trond Myklebust | 3bec63d | 2007-06-17 16:02:44 -0400 | [diff] [blame] | 527 | { |
Trond Myklebust | 5e11934 | 2007-07-26 12:06:17 -0400 | [diff] [blame] | 528 | struct inode *inode = ctx->path.dentry->d_inode; |
Trond Myklebust | 3bec63d | 2007-06-17 16:02:44 -0400 | [diff] [blame] | 529 | |
Trond Myklebust | 5e11934 | 2007-07-26 12:06:17 -0400 | [diff] [blame] | 530 | if (!atomic_dec_and_lock(&ctx->count, &inode->i_lock)) |
| 531 | return; |
| 532 | list_del(&ctx->list); |
| 533 | spin_unlock(&inode->i_lock); |
Trond Myklebust | a49c3c7 | 2007-10-18 18:03:27 -0400 | [diff] [blame] | 534 | if (ctx->state != NULL) { |
| 535 | if (wait) |
| 536 | nfs4_close_sync(&ctx->path, ctx->state, ctx->mode); |
| 537 | else |
| 538 | nfs4_close_state(&ctx->path, ctx->state, ctx->mode); |
| 539 | } |
Trond Myklebust | 3bec63d | 2007-06-17 16:02:44 -0400 | [diff] [blame] | 540 | if (ctx->cred != NULL) |
| 541 | put_rpccred(ctx->cred); |
| 542 | dput(ctx->path.dentry); |
| 543 | mntput(ctx->path.mnt); |
| 544 | kfree(ctx); |
| 545 | } |
| 546 | |
Trond Myklebust | a49c3c7 | 2007-10-18 18:03:27 -0400 | [diff] [blame] | 547 | void put_nfs_open_context(struct nfs_open_context *ctx) |
| 548 | { |
| 549 | __put_nfs_open_context(ctx, 0); |
| 550 | } |
| 551 | |
| 552 | static void put_nfs_open_context_sync(struct nfs_open_context *ctx) |
| 553 | { |
| 554 | __put_nfs_open_context(ctx, 1); |
| 555 | } |
| 556 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 557 | /* |
| 558 | * Ensure that mmap has a recent RPC credential for use when writing out |
| 559 | * shared pages |
| 560 | */ |
Trond Myklebust | b92dccf | 2006-03-20 13:44:03 -0500 | [diff] [blame] | 561 | static void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 562 | { |
Josef "Jeff" Sipek | 01cce93 | 2006-12-08 02:36:40 -0800 | [diff] [blame] | 563 | struct inode *inode = filp->f_path.dentry->d_inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 564 | struct nfs_inode *nfsi = NFS_I(inode); |
| 565 | |
| 566 | filp->private_data = get_nfs_open_context(ctx); |
| 567 | spin_lock(&inode->i_lock); |
| 568 | list_add(&ctx->list, &nfsi->open_files); |
| 569 | spin_unlock(&inode->i_lock); |
| 570 | } |
| 571 | |
Trond Myklebust | d530838 | 2005-11-04 15:33:38 -0500 | [diff] [blame] | 572 | /* |
| 573 | * Given an inode, search for an open context with the desired characteristics |
| 574 | */ |
| 575 | struct nfs_open_context *nfs_find_open_context(struct inode *inode, struct rpc_cred *cred, int mode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 576 | { |
| 577 | struct nfs_inode *nfsi = NFS_I(inode); |
| 578 | struct nfs_open_context *pos, *ctx = NULL; |
| 579 | |
| 580 | spin_lock(&inode->i_lock); |
| 581 | list_for_each_entry(pos, &nfsi->open_files, list) { |
Trond Myklebust | d530838 | 2005-11-04 15:33:38 -0500 | [diff] [blame] | 582 | if (cred != NULL && pos->cred != cred) |
| 583 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 584 | if ((pos->mode & mode) == mode) { |
| 585 | ctx = get_nfs_open_context(pos); |
| 586 | break; |
| 587 | } |
| 588 | } |
| 589 | spin_unlock(&inode->i_lock); |
| 590 | return ctx; |
| 591 | } |
| 592 | |
Trond Myklebust | b92dccf | 2006-03-20 13:44:03 -0500 | [diff] [blame] | 593 | static void nfs_file_clear_open_context(struct file *filp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 594 | { |
Josef "Jeff" Sipek | 01cce93 | 2006-12-08 02:36:40 -0800 | [diff] [blame] | 595 | struct inode *inode = filp->f_path.dentry->d_inode; |
Trond Myklebust | cd3758e | 2007-08-10 17:44:32 -0400 | [diff] [blame] | 596 | struct nfs_open_context *ctx = nfs_file_open_context(filp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 597 | |
| 598 | if (ctx) { |
| 599 | filp->private_data = NULL; |
| 600 | spin_lock(&inode->i_lock); |
| 601 | list_move_tail(&ctx->list, &NFS_I(inode)->open_files); |
| 602 | spin_unlock(&inode->i_lock); |
Trond Myklebust | a49c3c7 | 2007-10-18 18:03:27 -0400 | [diff] [blame] | 603 | put_nfs_open_context_sync(ctx); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 604 | } |
| 605 | } |
| 606 | |
| 607 | /* |
| 608 | * These allocate and release file read/write context information. |
| 609 | */ |
| 610 | int nfs_open(struct inode *inode, struct file *filp) |
| 611 | { |
| 612 | struct nfs_open_context *ctx; |
| 613 | struct rpc_cred *cred; |
| 614 | |
| 615 | cred = rpcauth_lookupcred(NFS_CLIENT(inode)->cl_auth, 0); |
| 616 | if (IS_ERR(cred)) |
| 617 | return PTR_ERR(cred); |
Josef "Jeff" Sipek | 01cce93 | 2006-12-08 02:36:40 -0800 | [diff] [blame] | 618 | ctx = alloc_nfs_open_context(filp->f_path.mnt, filp->f_path.dentry, cred); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 619 | put_rpccred(cred); |
| 620 | if (ctx == NULL) |
| 621 | return -ENOMEM; |
| 622 | ctx->mode = filp->f_mode; |
| 623 | nfs_file_set_open_context(filp, ctx); |
| 624 | put_nfs_open_context(ctx); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 625 | return 0; |
| 626 | } |
| 627 | |
| 628 | int nfs_release(struct inode *inode, struct file *filp) |
| 629 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 630 | nfs_file_clear_open_context(filp); |
| 631 | return 0; |
| 632 | } |
| 633 | |
| 634 | /* |
| 635 | * This function is called whenever some part of NFS notices that |
| 636 | * the cached attributes have to be refreshed. |
| 637 | */ |
| 638 | int |
| 639 | __nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) |
| 640 | { |
| 641 | int status = -ESTALE; |
| 642 | struct nfs_fattr fattr; |
| 643 | struct nfs_inode *nfsi = NFS_I(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 644 | |
| 645 | dfprintk(PAGECACHE, "NFS: revalidating (%s/%Ld)\n", |
| 646 | inode->i_sb->s_id, (long long)NFS_FILEID(inode)); |
| 647 | |
Trond Myklebust | 1842bfb | 2006-05-25 01:41:01 -0400 | [diff] [blame] | 648 | nfs_inc_stats(inode, NFSIOS_INODEREVALIDATE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 649 | lock_kernel(); |
Chuck Lever | 85233a7 | 2006-10-19 23:28:42 -0700 | [diff] [blame] | 650 | if (is_bad_inode(inode)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 651 | goto out_nowait; |
| 652 | if (NFS_STALE(inode)) |
| 653 | goto out_nowait; |
| 654 | |
Chuck Lever | 412d582 | 2005-08-18 11:24:11 -0700 | [diff] [blame] | 655 | status = nfs_wait_on_inode(inode); |
| 656 | if (status < 0) |
| 657 | goto out; |
Trond Myklebust | 7fdc49c | 2007-09-28 19:11:33 -0400 | [diff] [blame] | 658 | |
| 659 | status = -ESTALE; |
| 660 | if (NFS_STALE(inode)) |
| 661 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 662 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 663 | status = NFS_PROTO(inode)->getattr(server, NFS_FH(inode), &fattr); |
| 664 | if (status != 0) { |
| 665 | dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) getattr failed, error=%d\n", |
| 666 | inode->i_sb->s_id, |
| 667 | (long long)NFS_FILEID(inode), status); |
| 668 | if (status == -ESTALE) { |
| 669 | nfs_zap_caches(inode); |
| 670 | if (!S_ISDIR(inode->i_mode)) |
Benny Halevy | 3a10c30 | 2008-01-23 08:58:59 +0200 | [diff] [blame] | 671 | set_bit(NFS_INO_STALE, &NFS_I(inode)->flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 672 | } |
| 673 | goto out; |
| 674 | } |
| 675 | |
Trond Myklebust | 3380114 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 676 | spin_lock(&inode->i_lock); |
Trond Myklebust | 24aa1fe | 2005-12-03 15:20:07 -0500 | [diff] [blame] | 677 | status = nfs_update_inode(inode, &fattr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 678 | if (status) { |
Trond Myklebust | 3380114 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 679 | spin_unlock(&inode->i_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 680 | dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) refresh failed, error=%d\n", |
| 681 | inode->i_sb->s_id, |
| 682 | (long long)NFS_FILEID(inode), status); |
| 683 | goto out; |
| 684 | } |
Chuck Lever | dc59250 | 2005-08-18 11:24:12 -0700 | [diff] [blame] | 685 | spin_unlock(&inode->i_lock); |
Chuck Lever | 5529680 | 2005-08-18 11:24:09 -0700 | [diff] [blame] | 686 | |
Trond Myklebust | 24aa1fe | 2005-12-03 15:20:07 -0500 | [diff] [blame] | 687 | if (nfsi->cache_validity & NFS_INO_INVALID_ACL) |
Trond Myklebust | ada70d9 | 2005-06-22 17:16:22 +0000 | [diff] [blame] | 688 | nfs_zap_acl_cache(inode); |
Chuck Lever | 5529680 | 2005-08-18 11:24:09 -0700 | [diff] [blame] | 689 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 690 | dfprintk(PAGECACHE, "NFS: (%s/%Ld) revalidation complete\n", |
| 691 | inode->i_sb->s_id, |
| 692 | (long long)NFS_FILEID(inode)); |
| 693 | |
Chuck Lever | 412d582 | 2005-08-18 11:24:11 -0700 | [diff] [blame] | 694 | out: |
| 695 | nfs_wake_up_inode(inode); |
| 696 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 697 | out_nowait: |
| 698 | unlock_kernel(); |
| 699 | return status; |
| 700 | } |
| 701 | |
| 702 | int nfs_attribute_timeout(struct inode *inode) |
| 703 | { |
| 704 | struct nfs_inode *nfsi = NFS_I(inode); |
| 705 | |
| 706 | if (nfs_have_delegation(inode, FMODE_READ)) |
| 707 | return 0; |
Fabio Olive Leite | c7e1596 | 2007-07-26 22:59:00 -0300 | [diff] [blame] | 708 | return !time_in_range(jiffies, nfsi->read_cache_jiffies, nfsi->read_cache_jiffies + nfsi->attrtimeo); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 709 | } |
| 710 | |
| 711 | /** |
| 712 | * nfs_revalidate_inode - Revalidate the inode attributes |
| 713 | * @server - pointer to nfs_server struct |
| 714 | * @inode - pointer to inode struct |
| 715 | * |
| 716 | * Updates inode attribute information by retrieving the data from the server. |
| 717 | */ |
| 718 | int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) |
| 719 | { |
Trond Myklebust | 44b1187 | 2006-05-25 01:40:59 -0400 | [diff] [blame] | 720 | if (!(NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATTR) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 721 | && !nfs_attribute_timeout(inode)) |
| 722 | return NFS_STALE(inode) ? -ESTALE : 0; |
| 723 | return __nfs_revalidate_inode(server, inode); |
| 724 | } |
| 725 | |
Trond Myklebust | 717d44e | 2007-01-24 11:54:55 -0800 | [diff] [blame] | 726 | static int nfs_invalidate_mapping_nolock(struct inode *inode, struct address_space *mapping) |
| 727 | { |
| 728 | struct nfs_inode *nfsi = NFS_I(inode); |
| 729 | |
| 730 | if (mapping->nrpages != 0) { |
| 731 | int ret = invalidate_inode_pages2(mapping); |
| 732 | if (ret < 0) |
| 733 | return ret; |
| 734 | } |
| 735 | spin_lock(&inode->i_lock); |
| 736 | nfsi->cache_validity &= ~NFS_INO_INVALID_DATA; |
Trond Myklebust | 2f78e43 | 2007-09-30 15:31:19 -0400 | [diff] [blame] | 737 | if (S_ISDIR(inode->i_mode)) |
Trond Myklebust | 717d44e | 2007-01-24 11:54:55 -0800 | [diff] [blame] | 738 | memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf)); |
Trond Myklebust | 717d44e | 2007-01-24 11:54:55 -0800 | [diff] [blame] | 739 | spin_unlock(&inode->i_lock); |
| 740 | nfs_inc_stats(inode, NFSIOS_DATAINVALIDATE); |
| 741 | dfprintk(PAGECACHE, "NFS: (%s/%Ld) data cache invalidated\n", |
| 742 | inode->i_sb->s_id, (long long)NFS_FILEID(inode)); |
| 743 | return 0; |
| 744 | } |
| 745 | |
| 746 | static int nfs_invalidate_mapping(struct inode *inode, struct address_space *mapping) |
| 747 | { |
| 748 | int ret = 0; |
| 749 | |
| 750 | mutex_lock(&inode->i_mutex); |
| 751 | if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_DATA) { |
| 752 | ret = nfs_sync_mapping(mapping); |
| 753 | if (ret == 0) |
| 754 | ret = nfs_invalidate_mapping_nolock(inode, mapping); |
| 755 | } |
| 756 | mutex_unlock(&inode->i_mutex); |
| 757 | return ret; |
| 758 | } |
| 759 | |
| 760 | /** |
| 761 | * nfs_revalidate_mapping_nolock - Revalidate the pagecache |
| 762 | * @inode - pointer to host inode |
| 763 | * @mapping - pointer to mapping |
| 764 | */ |
| 765 | int nfs_revalidate_mapping_nolock(struct inode *inode, struct address_space *mapping) |
| 766 | { |
| 767 | struct nfs_inode *nfsi = NFS_I(inode); |
| 768 | int ret = 0; |
| 769 | |
| 770 | if ((nfsi->cache_validity & NFS_INO_REVAL_PAGECACHE) |
| 771 | || nfs_attribute_timeout(inode) || NFS_STALE(inode)) { |
| 772 | ret = __nfs_revalidate_inode(NFS_SERVER(inode), inode); |
| 773 | if (ret < 0) |
| 774 | goto out; |
| 775 | } |
| 776 | if (nfsi->cache_validity & NFS_INO_INVALID_DATA) |
| 777 | ret = nfs_invalidate_mapping_nolock(inode, mapping); |
| 778 | out: |
| 779 | return ret; |
| 780 | } |
| 781 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 782 | /** |
Trond Myklebust | 7d52e86 | 2005-06-22 17:16:30 +0000 | [diff] [blame] | 783 | * nfs_revalidate_mapping - Revalidate the pagecache |
| 784 | * @inode - pointer to host inode |
| 785 | * @mapping - pointer to mapping |
Trond Myklebust | 717d44e | 2007-01-24 11:54:55 -0800 | [diff] [blame] | 786 | * |
| 787 | * This version of the function will take the inode->i_mutex and attempt to |
| 788 | * flush out all dirty data if it needs to invalidate the page cache. |
Trond Myklebust | 7d52e86 | 2005-06-22 17:16:30 +0000 | [diff] [blame] | 789 | */ |
Trond Myklebust | 44b1187 | 2006-05-25 01:40:59 -0400 | [diff] [blame] | 790 | int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping) |
Trond Myklebust | 7d52e86 | 2005-06-22 17:16:30 +0000 | [diff] [blame] | 791 | { |
| 792 | struct nfs_inode *nfsi = NFS_I(inode); |
Trond Myklebust | 44b1187 | 2006-05-25 01:40:59 -0400 | [diff] [blame] | 793 | int ret = 0; |
| 794 | |
Trond Myklebust | 44b1187 | 2006-05-25 01:40:59 -0400 | [diff] [blame] | 795 | if ((nfsi->cache_validity & NFS_INO_REVAL_PAGECACHE) |
Trond Myklebust | 717d44e | 2007-01-24 11:54:55 -0800 | [diff] [blame] | 796 | || nfs_attribute_timeout(inode) || NFS_STALE(inode)) { |
Trond Myklebust | 44b1187 | 2006-05-25 01:40:59 -0400 | [diff] [blame] | 797 | ret = __nfs_revalidate_inode(NFS_SERVER(inode), inode); |
Trond Myklebust | 717d44e | 2007-01-24 11:54:55 -0800 | [diff] [blame] | 798 | if (ret < 0) |
| 799 | goto out; |
Trond Myklebust | 7d52e86 | 2005-06-22 17:16:30 +0000 | [diff] [blame] | 800 | } |
Trond Myklebust | 717d44e | 2007-01-24 11:54:55 -0800 | [diff] [blame] | 801 | if (nfsi->cache_validity & NFS_INO_INVALID_DATA) |
| 802 | ret = nfs_invalidate_mapping(inode, mapping); |
Trond Myklebust | cd9ae2b | 2006-10-19 23:28:40 -0700 | [diff] [blame] | 803 | out: |
Trond Myklebust | 44b1187 | 2006-05-25 01:40:59 -0400 | [diff] [blame] | 804 | return ret; |
Trond Myklebust | 7d52e86 | 2005-06-22 17:16:30 +0000 | [diff] [blame] | 805 | } |
| 806 | |
Trond Myklebust | a895b4a | 2006-01-03 09:55:40 +0100 | [diff] [blame] | 807 | static void nfs_wcc_update_inode(struct inode *inode, struct nfs_fattr *fattr) |
| 808 | { |
| 809 | struct nfs_inode *nfsi = NFS_I(inode); |
| 810 | |
Trond Myklebust | 70ca885 | 2007-09-30 15:21:24 -0400 | [diff] [blame] | 811 | if ((fattr->valid & NFS_ATTR_WCC_V4) != 0 && |
| 812 | nfsi->change_attr == fattr->pre_change_attr) { |
| 813 | nfsi->change_attr = fattr->change_attr; |
| 814 | if (S_ISDIR(inode->i_mode)) |
| 815 | nfsi->cache_validity |= NFS_INO_INVALID_DATA; |
| 816 | } |
Trond Myklebust | a895b4a | 2006-01-03 09:55:40 +0100 | [diff] [blame] | 817 | /* If we have atomic WCC data, we may update some attributes */ |
| 818 | if ((fattr->valid & NFS_ATTR_WCC) != 0) { |
Trond Myklebust | 17cadc9 | 2007-09-27 10:07:31 -0400 | [diff] [blame] | 819 | if (timespec_equal(&inode->i_ctime, &fattr->pre_ctime)) |
Trond Myklebust | a895b4a | 2006-01-03 09:55:40 +0100 | [diff] [blame] | 820 | memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime)); |
Trond Myklebust | a895b4a | 2006-01-03 09:55:40 +0100 | [diff] [blame] | 821 | if (timespec_equal(&inode->i_mtime, &fattr->pre_mtime)) { |
| 822 | memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime)); |
Trond Myklebust | e323ea4 | 2007-09-30 17:03:25 -0400 | [diff] [blame] | 823 | if (S_ISDIR(inode->i_mode)) |
| 824 | nfsi->cache_validity |= NFS_INO_INVALID_DATA; |
Trond Myklebust | a895b4a | 2006-01-03 09:55:40 +0100 | [diff] [blame] | 825 | } |
Chuck Lever | 8a8c74b | 2007-10-26 13:31:47 -0400 | [diff] [blame] | 826 | if (inode->i_size == nfs_size_to_loff_t(fattr->pre_size) && |
| 827 | nfsi->npages == 0) |
| 828 | inode->i_size = nfs_size_to_loff_t(fattr->size); |
Trond Myklebust | a895b4a | 2006-01-03 09:55:40 +0100 | [diff] [blame] | 829 | } |
| 830 | } |
| 831 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 832 | /** |
Trond Myklebust | 3380114 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 833 | * nfs_check_inode_attributes - verify consistency of the inode attribute cache |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 834 | * @inode - pointer to inode |
| 835 | * @fattr - updated attributes |
| 836 | * |
| 837 | * Verifies the attribute cache. If we have just changed the attributes, |
| 838 | * so that fattr carries weak cache consistency data, then it may |
| 839 | * also update the ctime/mtime/change_attribute. |
| 840 | */ |
Trond Myklebust | 3380114 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 841 | 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] | 842 | { |
| 843 | struct nfs_inode *nfsi = NFS_I(inode); |
| 844 | loff_t cur_size, new_isize; |
Trond Myklebust | 2a3f5fd | 2007-10-08 14:26:13 -0400 | [diff] [blame] | 845 | unsigned long invalid = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 846 | |
Chuck Lever | dc59250 | 2005-08-18 11:24:12 -0700 | [diff] [blame] | 847 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 848 | /* Has the inode gone and changed behind our back? */ |
| 849 | if (nfsi->fileid != fattr->fileid |
Chuck Lever | dc59250 | 2005-08-18 11:24:12 -0700 | [diff] [blame] | 850 | || (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 851 | return -EIO; |
Chuck Lever | dc59250 | 2005-08-18 11:24:12 -0700 | [diff] [blame] | 852 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 853 | |
Trond Myklebust | ca62b9c | 2006-03-20 13:44:07 -0500 | [diff] [blame] | 854 | /* Do atomic weak cache consistency updates */ |
| 855 | nfs_wcc_update_inode(inode, fattr); |
| 856 | |
Trond Myklebust | 9d1e923 | 2006-05-25 01:40:46 -0400 | [diff] [blame] | 857 | if ((fattr->valid & NFS_ATTR_FATTR_V4) != 0 && |
Trond Myklebust | f1bb0b9 | 2006-05-25 01:40:55 -0400 | [diff] [blame] | 858 | nfsi->change_attr != fattr->change_attr) |
Trond Myklebust | 2a3f5fd | 2007-10-08 14:26:13 -0400 | [diff] [blame] | 859 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 860 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 861 | /* Verify a few of the more important attributes */ |
Trond Myklebust | f1bb0b9 | 2006-05-25 01:40:55 -0400 | [diff] [blame] | 862 | if (!timespec_equal(&inode->i_mtime, &fattr->mtime)) |
Trond Myklebust | 2a3f5fd | 2007-10-08 14:26:13 -0400 | [diff] [blame] | 863 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; |
Trond Myklebust | ca62b9c | 2006-03-20 13:44:07 -0500 | [diff] [blame] | 864 | |
| 865 | cur_size = i_size_read(inode); |
| 866 | new_isize = nfs_size_to_loff_t(fattr->size); |
Trond Myklebust | fb374d2 | 2006-03-20 13:44:08 -0500 | [diff] [blame] | 867 | if (cur_size != new_isize && nfsi->npages == 0) |
Trond Myklebust | 2a3f5fd | 2007-10-08 14:26:13 -0400 | [diff] [blame] | 868 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 869 | |
| 870 | /* Have any file permissions changed? */ |
| 871 | if ((inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO) |
| 872 | || inode->i_uid != fattr->uid |
| 873 | || inode->i_gid != fattr->gid) |
Trond Myklebust | 2a3f5fd | 2007-10-08 14:26:13 -0400 | [diff] [blame] | 874 | 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] | 875 | |
| 876 | /* Has the link count changed? */ |
| 877 | if (inode->i_nlink != fattr->nlink) |
Trond Myklebust | 2a3f5fd | 2007-10-08 14:26:13 -0400 | [diff] [blame] | 878 | invalid |= NFS_INO_INVALID_ATTR; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 879 | |
| 880 | if (!timespec_equal(&inode->i_atime, &fattr->atime)) |
Trond Myklebust | 2a3f5fd | 2007-10-08 14:26:13 -0400 | [diff] [blame] | 881 | invalid |= NFS_INO_INVALID_ATIME; |
| 882 | |
| 883 | if (invalid != 0) |
| 884 | nfsi->cache_validity |= invalid; |
| 885 | else |
| 886 | nfsi->cache_validity &= ~(NFS_INO_INVALID_ATTR |
| 887 | | NFS_INO_INVALID_ATIME |
| 888 | | NFS_INO_REVAL_PAGECACHE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 889 | |
Trond Myklebust | 3380114 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 890 | nfsi->read_cache_jiffies = fattr->time_start; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 891 | return 0; |
| 892 | } |
| 893 | |
Trond Myklebust | 3380114 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 894 | /** |
| 895 | * nfs_refresh_inode - try to update the inode attribute cache |
| 896 | * @inode - pointer to inode |
| 897 | * @fattr - updated attributes |
| 898 | * |
| 899 | * Check that an RPC call that returned attributes has not overlapped with |
| 900 | * other recent updates of the inode metadata, then decide whether it is |
| 901 | * safe to do a full update of the inode attributes, or whether just to |
| 902 | * call nfs_check_inode_attributes. |
| 903 | */ |
| 904 | int nfs_refresh_inode(struct inode *inode, struct nfs_fattr *fattr) |
| 905 | { |
| 906 | struct nfs_inode *nfsi = NFS_I(inode); |
| 907 | int status; |
| 908 | |
| 909 | if ((fattr->valid & NFS_ATTR_FATTR) == 0) |
| 910 | return 0; |
| 911 | spin_lock(&inode->i_lock); |
Trond Myklebust | 3380114 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 912 | if (time_after(fattr->time_start, nfsi->last_updated)) |
Trond Myklebust | 24aa1fe | 2005-12-03 15:20:07 -0500 | [diff] [blame] | 913 | status = nfs_update_inode(inode, fattr); |
Trond Myklebust | 3380114 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 914 | else |
| 915 | status = nfs_check_inode_attributes(inode, fattr); |
| 916 | |
| 917 | spin_unlock(&inode->i_lock); |
| 918 | return status; |
| 919 | } |
| 920 | |
Trond Myklebust | decf491 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 921 | /** |
| 922 | * nfs_post_op_update_inode - try to update the inode attribute cache |
| 923 | * @inode - pointer to inode |
| 924 | * @fattr - updated attributes |
| 925 | * |
| 926 | * After an operation that has changed the inode metadata, mark the |
| 927 | * attribute cache as being invalid, then try to update it. |
Chuck Lever | f551e44 | 2006-09-20 14:33:04 -0400 | [diff] [blame] | 928 | * |
| 929 | * NB: if the server didn't return any post op attributes, this |
| 930 | * function will force the retrieval of attributes before the next |
| 931 | * NFS request. Thus it should be used only for operations that |
| 932 | * are expected to change one or more attributes, to avoid |
| 933 | * unnecessary NFS requests and trips through nfs_update_inode(). |
Trond Myklebust | decf491 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 934 | */ |
| 935 | int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr) |
| 936 | { |
| 937 | struct nfs_inode *nfsi = NFS_I(inode); |
Trond Myklebust | decf491 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 938 | |
Trond Myklebust | 7668fdb | 2007-10-01 09:59:15 -0400 | [diff] [blame] | 939 | spin_lock(&inode->i_lock); |
Trond Myklebust | 2a3f5fd | 2007-10-08 14:26:13 -0400 | [diff] [blame] | 940 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; |
Trond Myklebust | 40d2470 | 2007-10-08 09:24:22 -0400 | [diff] [blame] | 941 | if (S_ISDIR(inode->i_mode)) |
| 942 | nfsi->cache_validity |= NFS_INO_INVALID_DATA; |
Trond Myklebust | 7668fdb | 2007-10-01 09:59:15 -0400 | [diff] [blame] | 943 | spin_unlock(&inode->i_lock); |
Trond Myklebust | 2a3f5fd | 2007-10-08 14:26:13 -0400 | [diff] [blame] | 944 | return nfs_refresh_inode(inode, fattr); |
Trond Myklebust | decf491 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 945 | } |
| 946 | |
Trond Myklebust | 70ca885 | 2007-09-30 15:21:24 -0400 | [diff] [blame] | 947 | /** |
| 948 | * nfs_post_op_update_inode_force_wcc - try to update the inode attribute cache |
| 949 | * @inode - pointer to inode |
| 950 | * @fattr - updated attributes |
| 951 | * |
| 952 | * After an operation that has changed the inode metadata, mark the |
| 953 | * attribute cache as being invalid, then try to update it. Fake up |
| 954 | * weak cache consistency data, if none exist. |
| 955 | * |
| 956 | * This function is mainly designed to be used by the ->write_done() functions. |
| 957 | */ |
| 958 | int nfs_post_op_update_inode_force_wcc(struct inode *inode, struct nfs_fattr *fattr) |
| 959 | { |
| 960 | if ((fattr->valid & NFS_ATTR_FATTR_V4) != 0 && |
| 961 | (fattr->valid & NFS_ATTR_WCC_V4) == 0) { |
| 962 | fattr->pre_change_attr = NFS_I(inode)->change_attr; |
| 963 | fattr->valid |= NFS_ATTR_WCC_V4; |
| 964 | } |
| 965 | if ((fattr->valid & NFS_ATTR_FATTR) != 0 && |
| 966 | (fattr->valid & NFS_ATTR_WCC) == 0) { |
| 967 | memcpy(&fattr->pre_ctime, &inode->i_ctime, sizeof(fattr->pre_ctime)); |
| 968 | memcpy(&fattr->pre_mtime, &inode->i_mtime, sizeof(fattr->pre_mtime)); |
| 969 | fattr->pre_size = inode->i_size; |
| 970 | fattr->valid |= NFS_ATTR_WCC; |
| 971 | } |
| 972 | return nfs_post_op_update_inode(inode, fattr); |
| 973 | } |
| 974 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 975 | /* |
| 976 | * Many nfs protocol calls return the new file attributes after |
| 977 | * an operation. Here we update the inode to reflect the state |
| 978 | * of the server's inode. |
| 979 | * |
| 980 | * This is a bit tricky because we have to make sure all dirty pages |
| 981 | * have been sent off to the server before calling invalidate_inode_pages. |
| 982 | * To make sure no other process adds more write requests while we try |
| 983 | * our best to flush them, we make them sleep during the attribute refresh. |
| 984 | * |
| 985 | * A very similar scenario holds for the dir cache. |
| 986 | */ |
Trond Myklebust | 24aa1fe | 2005-12-03 15:20:07 -0500 | [diff] [blame] | 987 | static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 988 | { |
Trond Myklebust | 8b4bdcf | 2006-06-09 09:34:19 -0400 | [diff] [blame] | 989 | struct nfs_server *server; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 990 | struct nfs_inode *nfsi = NFS_I(inode); |
Trond Myklebust | 951a143 | 2005-06-22 17:16:30 +0000 | [diff] [blame] | 991 | loff_t cur_isize, new_isize; |
Trond Myklebust | 2a3f5fd | 2007-10-08 14:26:13 -0400 | [diff] [blame] | 992 | unsigned long invalid = 0; |
Trond Myklebust | 3e7d950 | 2007-02-05 14:26:28 -0800 | [diff] [blame] | 993 | unsigned long now = jiffies; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 994 | |
| 995 | dfprintk(VFS, "NFS: %s(%s/%ld ct=%d info=0x%x)\n", |
| 996 | __FUNCTION__, inode->i_sb->s_id, inode->i_ino, |
| 997 | atomic_read(&inode->i_count), fattr->valid); |
| 998 | |
Chuck Lever | 325cfed | 2005-11-30 18:08:55 -0500 | [diff] [blame] | 999 | if (nfsi->fileid != fattr->fileid) |
| 1000 | goto out_fileid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1001 | |
| 1002 | /* |
| 1003 | * Make sure the inode's type hasn't changed. |
| 1004 | */ |
Trond Myklebust | 3380114 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 1005 | if ((inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1006 | goto out_changed; |
| 1007 | |
Trond Myklebust | 8b4bdcf | 2006-06-09 09:34:19 -0400 | [diff] [blame] | 1008 | server = NFS_SERVER(inode); |
Trond Myklebust | a035686 | 2007-06-05 13:26:15 -0400 | [diff] [blame] | 1009 | /* Update the fsid? */ |
| 1010 | if (S_ISDIR(inode->i_mode) |
Trond Myklebust | 8b4bdcf | 2006-06-09 09:34:19 -0400 | [diff] [blame] | 1011 | && !nfs_fsid_equal(&server->fsid, &fattr->fsid)) |
| 1012 | server->fsid = fattr->fsid; |
| 1013 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1014 | /* |
| 1015 | * Update the read time so we don't revalidate too often. |
| 1016 | */ |
Trond Myklebust | 3380114 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 1017 | nfsi->read_cache_jiffies = fattr->time_start; |
Trond Myklebust | 3e7d950 | 2007-02-05 14:26:28 -0800 | [diff] [blame] | 1018 | |
Trond Myklebust | f2115dc | 2007-08-15 12:49:17 -0400 | [diff] [blame] | 1019 | nfsi->cache_validity &= ~(NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ATIME |
| 1020 | | NFS_INO_REVAL_PAGECACHE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1021 | |
Trond Myklebust | a895b4a | 2006-01-03 09:55:40 +0100 | [diff] [blame] | 1022 | /* Do atomic weak cache consistency updates */ |
| 1023 | nfs_wcc_update_inode(inode, fattr); |
| 1024 | |
Trond Myklebust | 47aabaa | 2007-09-27 15:57:24 -0400 | [diff] [blame] | 1025 | /* More cache consistency checks */ |
| 1026 | if (!(fattr->valid & NFS_ATTR_FATTR_V4)) { |
| 1027 | /* NFSv2/v3: Check if the mtime agrees */ |
| 1028 | if (!timespec_equal(&inode->i_mtime, &fattr->mtime)) { |
| 1029 | dprintk("NFS: mtime change on server for file %s/%ld\n", |
| 1030 | inode->i_sb->s_id, inode->i_ino); |
| 1031 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA; |
Trond Myklebust | bfc69a4 | 2007-10-15 18:18:29 -0400 | [diff] [blame] | 1032 | if (S_ISDIR(inode->i_mode)) |
| 1033 | nfs_force_lookup_revalidate(inode); |
Trond Myklebust | 47aabaa | 2007-09-27 15:57:24 -0400 | [diff] [blame] | 1034 | } |
| 1035 | /* If ctime has changed we should definitely clear access+acl caches */ |
Trond Myklebust | 12b373e | 2007-10-01 09:56:59 -0400 | [diff] [blame] | 1036 | if (!timespec_equal(&inode->i_ctime, &fattr->ctime)) |
Trond Myklebust | 47aabaa | 2007-09-27 15:57:24 -0400 | [diff] [blame] | 1037 | invalid |= NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
Trond Myklebust | 47aabaa | 2007-09-27 15:57:24 -0400 | [diff] [blame] | 1038 | } else if (nfsi->change_attr != fattr->change_attr) { |
| 1039 | dprintk("NFS: change_attr change on server for file %s/%ld\n", |
| 1040 | inode->i_sb->s_id, inode->i_ino); |
| 1041 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
Trond Myklebust | bfc69a4 | 2007-10-15 18:18:29 -0400 | [diff] [blame] | 1042 | if (S_ISDIR(inode->i_mode)) |
| 1043 | nfs_force_lookup_revalidate(inode); |
Trond Myklebust | 47aabaa | 2007-09-27 15:57:24 -0400 | [diff] [blame] | 1044 | } |
| 1045 | |
Trond Myklebust | 951a143 | 2005-06-22 17:16:30 +0000 | [diff] [blame] | 1046 | /* Check if our cached file size is stale */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1047 | new_isize = nfs_size_to_loff_t(fattr->size); |
| 1048 | cur_isize = i_size_read(inode); |
Trond Myklebust | 951a143 | 2005-06-22 17:16:30 +0000 | [diff] [blame] | 1049 | if (new_isize != cur_isize) { |
Trond Myklebust | b64e8a5 | 2007-09-30 15:13:17 -0400 | [diff] [blame] | 1050 | /* Do we perhaps have any outstanding writes, or has |
| 1051 | * the file grown beyond our last write? */ |
| 1052 | if (nfsi->npages == 0 || new_isize > cur_isize) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1053 | inode->i_size = new_isize; |
| 1054 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA; |
| 1055 | } |
Trond Myklebust | 951a143 | 2005-06-22 17:16:30 +0000 | [diff] [blame] | 1056 | dprintk("NFS: isize change on server for file %s/%ld\n", |
| 1057 | inode->i_sb->s_id, inode->i_ino); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1058 | } |
| 1059 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1060 | |
Trond Myklebust | 47aabaa | 2007-09-27 15:57:24 -0400 | [diff] [blame] | 1061 | memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime)); |
| 1062 | memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1063 | memcpy(&inode->i_atime, &fattr->atime, sizeof(inode->i_atime)); |
Trond Myklebust | 47aabaa | 2007-09-27 15:57:24 -0400 | [diff] [blame] | 1064 | nfsi->change_attr = fattr->change_attr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1065 | |
| 1066 | if ((inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO) || |
| 1067 | inode->i_uid != fattr->uid || |
| 1068 | inode->i_gid != fattr->gid) |
Trond Myklebust | ada70d9 | 2005-06-22 17:16:22 +0000 | [diff] [blame] | 1069 | 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] | 1070 | |
| 1071 | inode->i_mode = fattr->mode; |
| 1072 | inode->i_nlink = fattr->nlink; |
| 1073 | inode->i_uid = fattr->uid; |
| 1074 | inode->i_gid = fattr->gid; |
| 1075 | |
| 1076 | if (fattr->valid & (NFS_ATTR_FATTR_V3 | NFS_ATTR_FATTR_V4)) { |
| 1077 | /* |
| 1078 | * report the blocks in 512byte units |
| 1079 | */ |
| 1080 | inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1081 | } else { |
| 1082 | inode->i_blocks = fattr->du.nfs2.blocks; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1083 | } |
| 1084 | |
| 1085 | /* Update attrtimeo value if we're out of the unstable period */ |
| 1086 | if (invalid & NFS_INO_INVALID_ATTR) { |
Chuck Lever | 91d5b47 | 2006-03-20 13:44:14 -0500 | [diff] [blame] | 1087 | nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1088 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); |
Trond Myklebust | 3e7d950 | 2007-02-05 14:26:28 -0800 | [diff] [blame] | 1089 | nfsi->attrtimeo_timestamp = now; |
Trond Myklebust | 6d2b296 | 2007-10-01 18:57:50 -0400 | [diff] [blame] | 1090 | nfsi->last_updated = now; |
| 1091 | } else { |
| 1092 | if (!time_in_range(now, nfsi->attrtimeo_timestamp, nfsi->attrtimeo_timestamp + nfsi->attrtimeo)) { |
| 1093 | if ((nfsi->attrtimeo <<= 1) > NFS_MAXATTRTIMEO(inode)) |
| 1094 | nfsi->attrtimeo = NFS_MAXATTRTIMEO(inode); |
| 1095 | nfsi->attrtimeo_timestamp = now; |
| 1096 | } |
| 1097 | /* |
| 1098 | * Avoid jiffy wraparound issues with nfsi->last_updated |
| 1099 | */ |
| 1100 | if (!time_in_range(nfsi->last_updated, nfsi->read_cache_jiffies, now)) |
| 1101 | nfsi->last_updated = nfsi->read_cache_jiffies; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1102 | } |
Trond Myklebust | f2115dc | 2007-08-15 12:49:17 -0400 | [diff] [blame] | 1103 | invalid &= ~NFS_INO_INVALID_ATTR; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1104 | /* Don't invalidate the data if we were to blame */ |
| 1105 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) |
| 1106 | || S_ISLNK(inode->i_mode))) |
| 1107 | invalid &= ~NFS_INO_INVALID_DATA; |
Trond Myklebust | 412c77c | 2007-07-03 16:10:55 -0400 | [diff] [blame] | 1108 | if (!nfs_have_delegation(inode, FMODE_READ) || |
| 1109 | (nfsi->cache_validity & NFS_INO_REVAL_FORCED)) |
Chuck Lever | 5529680 | 2005-08-18 11:24:09 -0700 | [diff] [blame] | 1110 | nfsi->cache_validity |= invalid; |
Trond Myklebust | 412c77c | 2007-07-03 16:10:55 -0400 | [diff] [blame] | 1111 | nfsi->cache_validity &= ~NFS_INO_REVAL_FORCED; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1112 | |
| 1113 | return 0; |
| 1114 | out_changed: |
| 1115 | /* |
| 1116 | * Big trouble! The inode has become a different object. |
| 1117 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1118 | printk(KERN_DEBUG "%s: inode %ld mode changed, %07o to %07o\n", |
| 1119 | __FUNCTION__, inode->i_ino, inode->i_mode, fattr->mode); |
Trond Myklebust | b37b03b | 2005-11-25 17:10:06 -0500 | [diff] [blame] | 1120 | out_err: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1121 | /* |
| 1122 | * No need to worry about unhashing the dentry, as the |
| 1123 | * lookup validation will know that the inode is bad. |
| 1124 | * (But we fall through to invalidate the caches.) |
| 1125 | */ |
| 1126 | nfs_invalidate_inode(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1127 | return -ESTALE; |
Chuck Lever | 325cfed | 2005-11-30 18:08:55 -0500 | [diff] [blame] | 1128 | |
| 1129 | out_fileid: |
| 1130 | printk(KERN_ERR "NFS: server %s error: fileid changed\n" |
| 1131 | "fsid %s: expected fileid 0x%Lx, got 0x%Lx\n", |
David Howells | 54ceac4 | 2006-08-22 20:06:13 -0400 | [diff] [blame] | 1132 | NFS_SERVER(inode)->nfs_client->cl_hostname, inode->i_sb->s_id, |
Chuck Lever | 325cfed | 2005-11-30 18:08:55 -0500 | [diff] [blame] | 1133 | (long long)nfsi->fileid, (long long)fattr->fileid); |
| 1134 | goto out_err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1135 | } |
| 1136 | |
Trond Myklebust | 55a9759 | 2006-06-09 09:34:19 -0400 | [diff] [blame] | 1137 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1138 | #ifdef CONFIG_NFS_V4 |
| 1139 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1140 | /* |
| 1141 | * Clean out any remaining NFSv4 state that might be left over due |
| 1142 | * to open() calls that passed nfs_atomic_lookup, but failed to call |
| 1143 | * nfs_open(). |
| 1144 | */ |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 1145 | void nfs4_clear_inode(struct inode *inode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1146 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1147 | /* If we are holding a delegation, return it! */ |
Trond Myklebust | e6f8107 | 2008-01-24 18:14:34 -0500 | [diff] [blame] | 1148 | nfs_inode_return_delegation_noreclaim(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1149 | /* First call standard NFS clear_inode() code */ |
| 1150 | nfs_clear_inode(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1151 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1152 | #endif |
| 1153 | |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 1154 | struct inode *nfs_alloc_inode(struct super_block *sb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1155 | { |
| 1156 | struct nfs_inode *nfsi; |
Christoph Lameter | e94b176 | 2006-12-06 20:33:17 -0800 | [diff] [blame] | 1157 | nfsi = (struct nfs_inode *)kmem_cache_alloc(nfs_inode_cachep, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1158 | if (!nfsi) |
| 1159 | return NULL; |
Chuck Lever | 5529680 | 2005-08-18 11:24:09 -0700 | [diff] [blame] | 1160 | nfsi->flags = 0UL; |
| 1161 | nfsi->cache_validity = 0UL; |
Trond Myklebust | 458818e | 2005-06-22 17:16:27 +0000 | [diff] [blame] | 1162 | #ifdef CONFIG_NFS_V3_ACL |
| 1163 | nfsi->acl_access = ERR_PTR(-EAGAIN); |
| 1164 | nfsi->acl_default = ERR_PTR(-EAGAIN); |
| 1165 | #endif |
J. Bruce Fields | e50a1c2 | 2005-06-22 17:16:23 +0000 | [diff] [blame] | 1166 | #ifdef CONFIG_NFS_V4 |
| 1167 | nfsi->nfs4_acl = NULL; |
| 1168 | #endif /* CONFIG_NFS_V4 */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1169 | return &nfsi->vfs_inode; |
| 1170 | } |
| 1171 | |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 1172 | void nfs_destroy_inode(struct inode *inode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1173 | { |
| 1174 | kmem_cache_free(nfs_inode_cachep, NFS_I(inode)); |
| 1175 | } |
| 1176 | |
Andrew Morton | d75d541 | 2006-06-25 02:41:26 -0700 | [diff] [blame] | 1177 | static inline void nfs4_init_once(struct nfs_inode *nfsi) |
| 1178 | { |
| 1179 | #ifdef CONFIG_NFS_V4 |
| 1180 | INIT_LIST_HEAD(&nfsi->open_states); |
| 1181 | nfsi->delegation = NULL; |
| 1182 | nfsi->delegation_state = 0; |
| 1183 | init_rwsem(&nfsi->rwsem); |
| 1184 | #endif |
| 1185 | } |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 1186 | |
Christoph Lameter | 4ba9b9d | 2007-10-16 23:25:51 -0700 | [diff] [blame] | 1187 | static void init_once(struct kmem_cache * cachep, void *foo) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1188 | { |
| 1189 | struct nfs_inode *nfsi = (struct nfs_inode *) foo; |
| 1190 | |
Christoph Lameter | a35afb8 | 2007-05-16 22:10:57 -0700 | [diff] [blame] | 1191 | inode_init_once(&nfsi->vfs_inode); |
Christoph Lameter | a35afb8 | 2007-05-16 22:10:57 -0700 | [diff] [blame] | 1192 | INIT_LIST_HEAD(&nfsi->open_files); |
| 1193 | INIT_LIST_HEAD(&nfsi->access_cache_entry_lru); |
| 1194 | INIT_LIST_HEAD(&nfsi->access_cache_inode_lru); |
| 1195 | INIT_RADIX_TREE(&nfsi->nfs_page_tree, GFP_ATOMIC); |
Christoph Lameter | a35afb8 | 2007-05-16 22:10:57 -0700 | [diff] [blame] | 1196 | nfsi->ncommit = 0; |
| 1197 | nfsi->npages = 0; |
Trond Myklebust | 565277f | 2007-10-15 18:17:53 -0400 | [diff] [blame] | 1198 | atomic_set(&nfsi->silly_count, 1); |
| 1199 | INIT_HLIST_HEAD(&nfsi->silly_list); |
| 1200 | init_waitqueue_head(&nfsi->waitqueue); |
Christoph Lameter | a35afb8 | 2007-05-16 22:10:57 -0700 | [diff] [blame] | 1201 | nfs4_init_once(nfsi); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1202 | } |
Paul Mundt | 20c2df8 | 2007-07-20 10:11:58 +0900 | [diff] [blame] | 1203 | |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 1204 | static int __init nfs_init_inodecache(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1205 | { |
| 1206 | nfs_inode_cachep = kmem_cache_create("nfs_inode_cache", |
| 1207 | sizeof(struct nfs_inode), |
Paul Jackson | fffb60f | 2006-03-24 03:16:06 -0800 | [diff] [blame] | 1208 | 0, (SLAB_RECLAIM_ACCOUNT| |
| 1209 | SLAB_MEM_SPREAD), |
Paul Mundt | 20c2df8 | 2007-07-20 10:11:58 +0900 | [diff] [blame] | 1210 | init_once); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1211 | if (nfs_inode_cachep == NULL) |
| 1212 | return -ENOMEM; |
| 1213 | |
| 1214 | return 0; |
| 1215 | } |
| 1216 | |
David Brownell | 266bee8 | 2006-06-27 12:59:15 -0700 | [diff] [blame] | 1217 | static void nfs_destroy_inodecache(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1218 | { |
Alexey Dobriyan | 1a1d92c | 2006-09-27 01:49:40 -0700 | [diff] [blame] | 1219 | kmem_cache_destroy(nfs_inode_cachep); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1220 | } |
| 1221 | |
| 1222 | /* |
| 1223 | * Initialize NFS |
| 1224 | */ |
| 1225 | static int __init init_nfs_fs(void) |
| 1226 | { |
| 1227 | int err; |
| 1228 | |
David Howells | 6aaca56 | 2006-08-22 20:06:13 -0400 | [diff] [blame] | 1229 | err = nfs_fs_proc_init(); |
| 1230 | if (err) |
| 1231 | goto out5; |
| 1232 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1233 | err = nfs_init_nfspagecache(); |
| 1234 | if (err) |
| 1235 | goto out4; |
| 1236 | |
| 1237 | err = nfs_init_inodecache(); |
| 1238 | if (err) |
| 1239 | goto out3; |
| 1240 | |
| 1241 | err = nfs_init_readpagecache(); |
| 1242 | if (err) |
| 1243 | goto out2; |
| 1244 | |
| 1245 | err = nfs_init_writepagecache(); |
| 1246 | if (err) |
| 1247 | goto out1; |
| 1248 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1249 | err = nfs_init_directcache(); |
| 1250 | if (err) |
| 1251 | goto out0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1252 | |
| 1253 | #ifdef CONFIG_PROC_FS |
| 1254 | rpc_proc_register(&nfs_rpcstat); |
| 1255 | #endif |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 1256 | if ((err = register_nfs_fs()) != 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1257 | goto out; |
| 1258 | return 0; |
| 1259 | out: |
| 1260 | #ifdef CONFIG_PROC_FS |
| 1261 | rpc_proc_unregister("nfs"); |
| 1262 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1263 | nfs_destroy_directcache(); |
Chuck Lever | 6b59a75 | 2005-11-30 18:08:19 -0500 | [diff] [blame] | 1264 | out0: |
Chuck Lever | 6b59a75 | 2005-11-30 18:08:19 -0500 | [diff] [blame] | 1265 | nfs_destroy_writepagecache(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1266 | out1: |
| 1267 | nfs_destroy_readpagecache(); |
| 1268 | out2: |
| 1269 | nfs_destroy_inodecache(); |
| 1270 | out3: |
| 1271 | nfs_destroy_nfspagecache(); |
| 1272 | out4: |
David Howells | 6aaca56 | 2006-08-22 20:06:13 -0400 | [diff] [blame] | 1273 | nfs_fs_proc_exit(); |
| 1274 | out5: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1275 | return err; |
| 1276 | } |
| 1277 | |
| 1278 | static void __exit exit_nfs_fs(void) |
| 1279 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1280 | nfs_destroy_directcache(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1281 | nfs_destroy_writepagecache(); |
| 1282 | nfs_destroy_readpagecache(); |
| 1283 | nfs_destroy_inodecache(); |
| 1284 | nfs_destroy_nfspagecache(); |
| 1285 | #ifdef CONFIG_PROC_FS |
| 1286 | rpc_proc_unregister("nfs"); |
| 1287 | #endif |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 1288 | unregister_nfs_fs(); |
David Howells | 6aaca56 | 2006-08-22 20:06:13 -0400 | [diff] [blame] | 1289 | nfs_fs_proc_exit(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1290 | } |
| 1291 | |
| 1292 | /* Not quite true; I just maintain it */ |
| 1293 | MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>"); |
| 1294 | MODULE_LICENSE("GPL"); |
Trond Myklebust | f43bf0b | 2007-10-09 12:01:04 -0400 | [diff] [blame] | 1295 | module_param(enable_ino64, bool, 0644); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1296 | |
| 1297 | module_init(init_nfs_fs) |
| 1298 | module_exit(exit_nfs_fs) |