Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * linux/include/linux/nfs_fs.h |
| 3 | * |
| 4 | * Copyright (C) 1992 Rick Sladkey |
| 5 | * |
| 6 | * OS-specific nfs filesystem definitions and declarations |
| 7 | */ |
| 8 | |
| 9 | #ifndef _LINUX_NFS_FS_H |
| 10 | #define _LINUX_NFS_FS_H |
| 11 | |
Jeff Garzik | e18fa70 | 2006-09-24 11:13:19 -0400 | [diff] [blame] | 12 | #include <linux/magic.h> |
| 13 | |
David Woodhouse | 7f1cbe5 | 2006-09-12 20:36:02 -0700 | [diff] [blame] | 14 | /* Default timeout values */ |
| 15 | #define NFS_MAX_UDP_TIMEOUT (60*HZ) |
| 16 | #define NFS_MAX_TCP_TIMEOUT (600*HZ) |
| 17 | |
| 18 | /* |
David Woodhouse | 7f1cbe5 | 2006-09-12 20:36:02 -0700 | [diff] [blame] | 19 | * When flushing a cluster of dirty pages, there can be different |
| 20 | * strategies: |
| 21 | */ |
| 22 | #define FLUSH_SYNC 1 /* file being synced, or contention */ |
| 23 | #define FLUSH_STABLE 4 /* commit to stable storage */ |
| 24 | #define FLUSH_LOWPRI 8 /* low priority background flush */ |
| 25 | #define FLUSH_HIGHPRI 16 /* high priority memory reclaim flush */ |
| 26 | #define FLUSH_NOCOMMIT 32 /* Don't send the NFSv3/v4 COMMIT */ |
| 27 | #define FLUSH_INVALIDATE 64 /* Invalidate the page cache */ |
Trond Myklebust | 4d770cc | 2006-12-05 00:35:41 -0500 | [diff] [blame] | 28 | #define FLUSH_NOWRITEPAGE 128 /* Don't call writepage() */ |
David Woodhouse | 7f1cbe5 | 2006-09-12 20:36:02 -0700 | [diff] [blame] | 29 | |
| 30 | #ifdef __KERNEL__ |
| 31 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 32 | #include <linux/in.h> |
Trond Myklebust | 3bec63d | 2007-06-17 16:02:44 -0400 | [diff] [blame] | 33 | #include <linux/kref.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 34 | #include <linux/mm.h> |
Trond Myklebust | 88be9f9 | 2007-06-05 10:42:27 -0400 | [diff] [blame] | 35 | #include <linux/namei.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | #include <linux/pagemap.h> |
Trond Myklebust | 1c3c07e | 2006-07-25 11:28:18 -0400 | [diff] [blame] | 37 | #include <linux/rbtree.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | #include <linux/rwsem.h> |
| 39 | #include <linux/wait.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | #include <linux/sunrpc/debug.h> |
| 42 | #include <linux/sunrpc/auth.h> |
| 43 | #include <linux/sunrpc/clnt.h> |
| 44 | |
| 45 | #include <linux/nfs.h> |
| 46 | #include <linux/nfs2.h> |
| 47 | #include <linux/nfs3.h> |
| 48 | #include <linux/nfs4.h> |
| 49 | #include <linux/nfs_xdr.h> |
Trond Myklebust | 8b4bdcf | 2006-06-09 09:34:19 -0400 | [diff] [blame] | 50 | #include <linux/nfs_fs_sb.h> |
| 51 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | #include <linux/mempool.h> |
| 53 | |
| 54 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 55 | * These are the default flags for swap requests |
| 56 | */ |
| 57 | #define NFS_RPC_SWAPFLAGS (RPC_TASK_SWAPPER|RPC_TASK_ROOTCREDS) |
| 58 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 59 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 60 | * NFSv3/v4 Access mode cache entry |
| 61 | */ |
| 62 | struct nfs_access_entry { |
Trond Myklebust | 1c3c07e | 2006-07-25 11:28:18 -0400 | [diff] [blame] | 63 | struct rb_node rb_node; |
Trond Myklebust | cfcea3e | 2006-07-25 11:28:18 -0400 | [diff] [blame] | 64 | struct list_head lru; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 65 | unsigned long jiffies; |
| 66 | struct rpc_cred * cred; |
| 67 | int mask; |
| 68 | }; |
| 69 | |
| 70 | struct nfs4_state; |
| 71 | struct nfs_open_context { |
Trond Myklebust | 5e11934 | 2007-07-26 12:06:17 -0400 | [diff] [blame] | 72 | atomic_t count; |
Trond Myklebust | 88be9f9 | 2007-06-05 10:42:27 -0400 | [diff] [blame] | 73 | struct path path; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 74 | struct rpc_cred *cred; |
| 75 | struct nfs4_state *state; |
| 76 | fl_owner_t lockowner; |
| 77 | int mode; |
Trond Myklebust | 7b159fc | 2007-07-25 14:09:54 -0400 | [diff] [blame] | 78 | |
| 79 | unsigned long flags; |
| 80 | #define NFS_CONTEXT_ERROR_WRITE (0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 81 | int error; |
| 82 | |
| 83 | struct list_head list; |
Olivier Galibert | 00a9264 | 2005-06-22 17:16:29 +0000 | [diff] [blame] | 84 | |
Olivier Galibert | 00a9264 | 2005-06-22 17:16:29 +0000 | [diff] [blame] | 85 | __u64 dir_cookie; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 86 | }; |
| 87 | |
| 88 | /* |
| 89 | * NFSv4 delegation |
| 90 | */ |
| 91 | struct nfs_delegation; |
| 92 | |
Andreas Gruenbacher | 5c6a9f7 | 2005-06-22 17:16:27 +0000 | [diff] [blame] | 93 | struct posix_acl; |
| 94 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 95 | /* |
| 96 | * nfs fs inode data in memory |
| 97 | */ |
| 98 | struct nfs_inode { |
| 99 | /* |
| 100 | * The 64bit 'inode number' |
| 101 | */ |
| 102 | __u64 fileid; |
| 103 | |
| 104 | /* |
| 105 | * NFS file handle |
| 106 | */ |
| 107 | struct nfs_fh fh; |
| 108 | |
| 109 | /* |
| 110 | * Various flags |
| 111 | */ |
Chuck Lever | 412d582 | 2005-08-18 11:24:11 -0700 | [diff] [blame] | 112 | unsigned long flags; /* atomic bit ops */ |
| 113 | unsigned long cache_validity; /* bit mask */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 114 | |
| 115 | /* |
Goldwyn Rodrigues | 24bd68f | 2006-03-20 13:44:11 -0500 | [diff] [blame] | 116 | * read_cache_jiffies is when we started read-caching this inode. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 117 | * attrtimeo is for how long the cached information is assumed |
| 118 | * to be valid. A successful attribute revalidation doubles |
| 119 | * attrtimeo (up to acregmax/acdirmax), a failure resets it to |
| 120 | * acregmin/acdirmin. |
| 121 | * |
| 122 | * We need to revalidate the cached attrs for this inode if |
| 123 | * |
| 124 | * jiffies - read_cache_jiffies > attrtimeo |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 125 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 126 | unsigned long read_cache_jiffies; |
| 127 | unsigned long attrtimeo; |
| 128 | unsigned long attrtimeo_timestamp; |
| 129 | __u64 change_attr; /* v4 only */ |
| 130 | |
Trond Myklebust | 3380114 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 131 | unsigned long last_updated; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 132 | /* "Generation counter" for the attribute cache. This is |
| 133 | * bumped whenever we update the metadata on the |
| 134 | * server. |
| 135 | */ |
| 136 | unsigned long cache_change_attribute; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 137 | |
Trond Myklebust | 1c3c07e | 2006-07-25 11:28:18 -0400 | [diff] [blame] | 138 | struct rb_root access_cache; |
Trond Myklebust | cfcea3e | 2006-07-25 11:28:18 -0400 | [diff] [blame] | 139 | struct list_head access_cache_entry_lru; |
| 140 | struct list_head access_cache_inode_lru; |
Andreas Gruenbacher | 5c6a9f7 | 2005-06-22 17:16:27 +0000 | [diff] [blame] | 141 | #ifdef CONFIG_NFS_V3_ACL |
| 142 | struct posix_acl *acl_access; |
| 143 | struct posix_acl *acl_default; |
| 144 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 145 | |
| 146 | /* |
| 147 | * This is the cookie verifier used for NFSv3 readdir |
| 148 | * operations |
| 149 | */ |
Al Viro | bc4785c | 2006-10-19 23:28:51 -0700 | [diff] [blame] | 150 | __be32 cookieverf[2]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 151 | |
| 152 | /* |
| 153 | * This is the list of dirty unwritten pages. |
| 154 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 155 | struct radix_tree_root nfs_page_tree; |
| 156 | |
Trond Myklebust | dce34ce | 2007-06-17 15:47:53 -0400 | [diff] [blame] | 157 | unsigned long ncommit, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 158 | npages; |
| 159 | |
| 160 | /* Open contexts for shared mmap writes */ |
| 161 | struct list_head open_files; |
| 162 | |
Trond Myklebust | 565277f | 2007-10-15 18:17:53 -0400 | [diff] [blame] | 163 | /* Number of in-flight sillydelete RPC calls */ |
| 164 | atomic_t silly_count; |
| 165 | /* List of deferred sillydelete requests */ |
| 166 | struct hlist_head silly_list; |
| 167 | wait_queue_head_t waitqueue; |
| 168 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 169 | #ifdef CONFIG_NFS_V4 |
J. Bruce Fields | e50a1c2 | 2005-06-22 17:16:23 +0000 | [diff] [blame] | 170 | struct nfs4_cached_acl *nfs4_acl; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 171 | /* NFSv4 state */ |
| 172 | struct list_head open_states; |
| 173 | struct nfs_delegation *delegation; |
| 174 | int delegation_state; |
| 175 | struct rw_semaphore rwsem; |
| 176 | #endif /* CONFIG_NFS_V4*/ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 177 | struct inode vfs_inode; |
| 178 | }; |
| 179 | |
| 180 | /* |
Chuck Lever | 5529680 | 2005-08-18 11:24:09 -0700 | [diff] [blame] | 181 | * Cache validity bit flags |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 182 | */ |
Chuck Lever | 5529680 | 2005-08-18 11:24:09 -0700 | [diff] [blame] | 183 | #define NFS_INO_INVALID_ATTR 0x0001 /* cached attrs are invalid */ |
| 184 | #define NFS_INO_INVALID_DATA 0x0002 /* cached data is invalid */ |
| 185 | #define NFS_INO_INVALID_ATIME 0x0004 /* cached atime is invalid */ |
| 186 | #define NFS_INO_INVALID_ACCESS 0x0008 /* cached access cred invalid */ |
| 187 | #define NFS_INO_INVALID_ACL 0x0010 /* cached acls are invalid */ |
| 188 | #define NFS_INO_REVAL_PAGECACHE 0x0020 /* must revalidate pagecache */ |
Trond Myklebust | 412c77c | 2007-07-03 16:10:55 -0400 | [diff] [blame] | 189 | #define NFS_INO_REVAL_FORCED 0x0040 /* force revalidation ignoring a delegation */ |
Chuck Lever | 5529680 | 2005-08-18 11:24:09 -0700 | [diff] [blame] | 190 | |
| 191 | /* |
Chuck Lever | 412d582 | 2005-08-18 11:24:11 -0700 | [diff] [blame] | 192 | * Bit offsets in flags field |
Chuck Lever | 5529680 | 2005-08-18 11:24:09 -0700 | [diff] [blame] | 193 | */ |
Chuck Lever | 412d582 | 2005-08-18 11:24:11 -0700 | [diff] [blame] | 194 | #define NFS_INO_REVALIDATING (0) /* revalidating attrs */ |
| 195 | #define NFS_INO_ADVISE_RDPLUS (1) /* advise readdirplus */ |
| 196 | #define NFS_INO_STALE (2) /* possible stale inode */ |
Trond Myklebust | cfcea3e | 2006-07-25 11:28:18 -0400 | [diff] [blame] | 197 | #define NFS_INO_ACL_LRU_SET (3) /* Inode is on the LRU list */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 198 | |
| 199 | static inline struct nfs_inode *NFS_I(struct inode *inode) |
| 200 | { |
| 201 | return container_of(inode, struct nfs_inode, vfs_inode); |
| 202 | } |
| 203 | #define NFS_SB(s) ((struct nfs_server *)(s->s_fs_info)) |
| 204 | |
| 205 | #define NFS_FH(inode) (&NFS_I(inode)->fh) |
| 206 | #define NFS_SERVER(inode) (NFS_SB(inode->i_sb)) |
| 207 | #define NFS_CLIENT(inode) (NFS_SERVER(inode)->client) |
David Howells | 8fa5c00 | 2006-08-22 20:06:12 -0400 | [diff] [blame] | 208 | #define NFS_PROTO(inode) (NFS_SERVER(inode)->nfs_client->rpc_ops) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 209 | #define NFS_COOKIEVERF(inode) (NFS_I(inode)->cookieverf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 210 | #define NFS_MINATTRTIMEO(inode) \ |
| 211 | (S_ISDIR(inode->i_mode)? NFS_SERVER(inode)->acdirmin \ |
| 212 | : NFS_SERVER(inode)->acregmin) |
| 213 | #define NFS_MAXATTRTIMEO(inode) \ |
| 214 | (S_ISDIR(inode->i_mode)? NFS_SERVER(inode)->acdirmax \ |
| 215 | : NFS_SERVER(inode)->acregmax) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 216 | |
Benny Halevy | 3a10c30 | 2008-01-23 08:58:59 +0200 | [diff] [blame^] | 217 | #define NFS_STALE(inode) (test_bit(NFS_INO_STALE, &NFS_I(inode)->flags)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 218 | |
| 219 | #define NFS_FILEID(inode) (NFS_I(inode)->fileid) |
| 220 | |
Trond Myklebust | decf491 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 221 | static inline void nfs_mark_for_revalidate(struct inode *inode) |
| 222 | { |
Trond Myklebust | 38478b2 | 2006-05-25 01:40:57 -0400 | [diff] [blame] | 223 | struct nfs_inode *nfsi = NFS_I(inode); |
| 224 | |
Trond Myklebust | decf491 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 225 | spin_lock(&inode->i_lock); |
Trond Myklebust | 38478b2 | 2006-05-25 01:40:57 -0400 | [diff] [blame] | 226 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS; |
Trond Myklebust | f382111 | 2007-10-01 10:00:23 -0400 | [diff] [blame] | 227 | if (S_ISDIR(inode->i_mode)) |
Trond Myklebust | 38478b2 | 2006-05-25 01:40:57 -0400 | [diff] [blame] | 228 | nfsi->cache_validity |= NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA; |
Trond Myklebust | decf491 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 229 | spin_unlock(&inode->i_lock); |
| 230 | } |
| 231 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 232 | static inline int nfs_server_capable(struct inode *inode, int cap) |
| 233 | { |
| 234 | return NFS_SERVER(inode)->caps & cap; |
| 235 | } |
| 236 | |
| 237 | static inline int NFS_USE_READDIRPLUS(struct inode *inode) |
| 238 | { |
Benny Halevy | 3a10c30 | 2008-01-23 08:58:59 +0200 | [diff] [blame^] | 239 | return test_bit(NFS_INO_ADVISE_RDPLUS, &NFS_I(inode)->flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 240 | } |
| 241 | |
Trond Myklebust | d75340c | 2007-10-01 21:42:01 -0400 | [diff] [blame] | 242 | static inline void nfs_set_verifier(struct dentry * dentry, unsigned long verf) |
| 243 | { |
| 244 | dentry->d_time = verf; |
| 245 | } |
| 246 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 247 | /** |
| 248 | * nfs_save_change_attribute - Returns the inode attribute change cookie |
Trond Myklebust | 8edb018 | 2007-09-29 17:14:03 -0400 | [diff] [blame] | 249 | * @dir - pointer to parent directory inode |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 250 | * The "change attribute" is updated every time we finish an operation |
| 251 | * that will result in a metadata change on the server. |
| 252 | */ |
Trond Myklebust | 8edb018 | 2007-09-29 17:14:03 -0400 | [diff] [blame] | 253 | static inline unsigned long nfs_save_change_attribute(struct inode *dir) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 254 | { |
Trond Myklebust | 8edb018 | 2007-09-29 17:14:03 -0400 | [diff] [blame] | 255 | return NFS_I(dir)->cache_change_attribute; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 256 | } |
| 257 | |
| 258 | /** |
Trond Myklebust | 4b84173 | 2007-09-29 17:15:01 -0400 | [diff] [blame] | 259 | * nfs_verify_change_attribute - Detects NFS remote directory changes |
| 260 | * @dir - pointer to parent directory inode |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 261 | * @chattr - previously saved change attribute |
Trond Myklebust | 4b84173 | 2007-09-29 17:15:01 -0400 | [diff] [blame] | 262 | * Return "false" if the verifiers doesn't match the change attribute. |
| 263 | * This would usually indicate that the directory contents have changed on |
| 264 | * the server, and that any dentries need revalidating. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 265 | */ |
Trond Myklebust | 4b84173 | 2007-09-29 17:15:01 -0400 | [diff] [blame] | 266 | static inline int nfs_verify_change_attribute(struct inode *dir, unsigned long chattr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 267 | { |
Trond Myklebust | 4b84173 | 2007-09-29 17:15:01 -0400 | [diff] [blame] | 268 | return chattr == NFS_I(dir)->cache_change_attribute; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 269 | } |
| 270 | |
| 271 | /* |
| 272 | * linux/fs/nfs/inode.c |
| 273 | */ |
Trond Myklebust | 29884df | 2005-12-13 16:13:54 -0500 | [diff] [blame] | 274 | extern int nfs_sync_mapping(struct address_space *mapping); |
Trond Myklebust | cd9ae2b | 2006-10-19 23:28:40 -0700 | [diff] [blame] | 275 | extern void nfs_zap_mapping(struct inode *inode, struct address_space *mapping); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 276 | extern void nfs_zap_caches(struct inode *); |
Trond Myklebust | c481299 | 2007-09-28 17:11:45 -0400 | [diff] [blame] | 277 | extern void nfs_invalidate_atime(struct inode *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 278 | extern struct inode *nfs_fhget(struct super_block *, struct nfs_fh *, |
| 279 | struct nfs_fattr *); |
| 280 | extern int nfs_refresh_inode(struct inode *, struct nfs_fattr *); |
Trond Myklebust | decf491 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 281 | extern int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr); |
Trond Myklebust | 70ca885 | 2007-09-30 15:21:24 -0400 | [diff] [blame] | 282 | extern int nfs_post_op_update_inode_force_wcc(struct inode *inode, struct nfs_fattr *fattr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 283 | extern int nfs_getattr(struct vfsmount *, struct dentry *, struct kstat *); |
| 284 | extern int nfs_permission(struct inode *, int, struct nameidata *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 285 | extern int nfs_open(struct inode *, struct file *); |
| 286 | extern int nfs_release(struct inode *, struct file *); |
| 287 | extern int nfs_attribute_timeout(struct inode *inode); |
| 288 | extern int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode); |
| 289 | extern int __nfs_revalidate_inode(struct nfs_server *, struct inode *); |
Trond Myklebust | 44b1187 | 2006-05-25 01:40:59 -0400 | [diff] [blame] | 290 | extern int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping); |
Trond Myklebust | 717d44e | 2007-01-24 11:54:55 -0800 | [diff] [blame] | 291 | extern int nfs_revalidate_mapping_nolock(struct inode *inode, struct address_space *mapping); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 292 | extern int nfs_setattr(struct dentry *, struct iattr *); |
Trond Myklebust | 65e4308 | 2005-08-16 11:49:44 -0400 | [diff] [blame] | 293 | extern void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 294 | extern struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx); |
| 295 | extern void put_nfs_open_context(struct nfs_open_context *ctx); |
Trond Myklebust | d530838 | 2005-11-04 15:33:38 -0500 | [diff] [blame] | 296 | extern struct nfs_open_context *nfs_find_open_context(struct inode *inode, struct rpc_cred *cred, int mode); |
Trond Myklebust | f43bf0b | 2007-10-09 12:01:04 -0400 | [diff] [blame] | 297 | extern u64 nfs_compat_user_ino64(u64 fileid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 298 | |
| 299 | /* linux/net/ipv4/ipconfig.c: trims ip addr off front of name, too. */ |
Al Viro | 5a874db | 2006-11-08 00:19:38 -0800 | [diff] [blame] | 300 | extern __be32 root_nfs_parse_addr(char *name); /*__init*/ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 301 | |
Trond Myklebust | 0e574af | 2005-10-27 22:12:38 -0400 | [diff] [blame] | 302 | static inline void nfs_fattr_init(struct nfs_fattr *fattr) |
| 303 | { |
| 304 | fattr->valid = 0; |
Trond Myklebust | 3380114 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 305 | fattr->time_start = jiffies; |
Trond Myklebust | 0e574af | 2005-10-27 22:12:38 -0400 | [diff] [blame] | 306 | } |
| 307 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 308 | /* |
| 309 | * linux/fs/nfs/file.c |
| 310 | */ |
Arjan van de Ven | c5ef1c4 | 2007-02-12 00:55:40 -0800 | [diff] [blame] | 311 | extern const struct inode_operations nfs_file_inode_operations; |
Andreas Gruenbacher | b7fa055 | 2005-06-22 17:16:27 +0000 | [diff] [blame] | 312 | #ifdef CONFIG_NFS_V3 |
Arjan van de Ven | c5ef1c4 | 2007-02-12 00:55:40 -0800 | [diff] [blame] | 313 | extern const struct inode_operations nfs3_file_inode_operations; |
Andreas Gruenbacher | b7fa055 | 2005-06-22 17:16:27 +0000 | [diff] [blame] | 314 | #endif /* CONFIG_NFS_V3 */ |
Arjan van de Ven | 4b6f5d2 | 2006-03-28 01:56:42 -0800 | [diff] [blame] | 315 | extern const struct file_operations nfs_file_operations; |
Christoph Hellwig | f5e54d6 | 2006-06-28 04:26:44 -0700 | [diff] [blame] | 316 | extern const struct address_space_operations nfs_file_aops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 317 | |
Trond Myklebust | c03025d | 2007-08-10 17:44:28 -0400 | [diff] [blame] | 318 | static inline struct nfs_open_context *nfs_file_open_context(struct file *filp) |
| 319 | { |
| 320 | return filp->private_data; |
| 321 | } |
| 322 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 323 | static inline struct rpc_cred *nfs_file_cred(struct file *file) |
| 324 | { |
Trond Myklebust | cd3758e | 2007-08-10 17:44:32 -0400 | [diff] [blame] | 325 | if (file != NULL) |
| 326 | return nfs_file_open_context(file)->cred; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 327 | return NULL; |
| 328 | } |
| 329 | |
| 330 | /* |
Andreas Gruenbacher | b7fa055 | 2005-06-22 17:16:27 +0000 | [diff] [blame] | 331 | * linux/fs/nfs/xattr.c |
| 332 | */ |
| 333 | #ifdef CONFIG_NFS_V3_ACL |
| 334 | extern ssize_t nfs3_listxattr(struct dentry *, char *, size_t); |
| 335 | extern ssize_t nfs3_getxattr(struct dentry *, const char *, void *, size_t); |
| 336 | extern int nfs3_setxattr(struct dentry *, const char *, |
| 337 | const void *, size_t, int); |
| 338 | extern int nfs3_removexattr (struct dentry *, const char *name); |
| 339 | #else |
| 340 | # define nfs3_listxattr NULL |
| 341 | # define nfs3_getxattr NULL |
| 342 | # define nfs3_setxattr NULL |
| 343 | # define nfs3_removexattr NULL |
| 344 | #endif |
| 345 | |
| 346 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 347 | * linux/fs/nfs/direct.c |
| 348 | */ |
| 349 | extern ssize_t nfs_direct_IO(int, struct kiocb *, const struct iovec *, loff_t, |
| 350 | unsigned long); |
Badari Pulavarty | 027445c | 2006-09-30 23:28:46 -0700 | [diff] [blame] | 351 | extern ssize_t nfs_file_direct_read(struct kiocb *iocb, |
| 352 | const struct iovec *iov, unsigned long nr_segs, |
| 353 | loff_t pos); |
| 354 | extern ssize_t nfs_file_direct_write(struct kiocb *iocb, |
| 355 | const struct iovec *iov, unsigned long nr_segs, |
| 356 | loff_t pos); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 357 | |
| 358 | /* |
| 359 | * linux/fs/nfs/dir.c |
| 360 | */ |
Arjan van de Ven | c5ef1c4 | 2007-02-12 00:55:40 -0800 | [diff] [blame] | 361 | extern const struct inode_operations nfs_dir_inode_operations; |
Andreas Gruenbacher | b7fa055 | 2005-06-22 17:16:27 +0000 | [diff] [blame] | 362 | #ifdef CONFIG_NFS_V3 |
Arjan van de Ven | c5ef1c4 | 2007-02-12 00:55:40 -0800 | [diff] [blame] | 363 | extern const struct inode_operations nfs3_dir_inode_operations; |
Andreas Gruenbacher | b7fa055 | 2005-06-22 17:16:27 +0000 | [diff] [blame] | 364 | #endif /* CONFIG_NFS_V3 */ |
Arjan van de Ven | 4b6f5d2 | 2006-03-28 01:56:42 -0800 | [diff] [blame] | 365 | extern const struct file_operations nfs_dir_operations; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 366 | extern struct dentry_operations nfs_dentry_operations; |
| 367 | |
Trond Myklebust | bfc69a4 | 2007-10-15 18:18:29 -0400 | [diff] [blame] | 368 | extern void nfs_force_lookup_revalidate(struct inode *dir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 369 | extern int nfs_instantiate(struct dentry *dentry, struct nfs_fh *fh, struct nfs_fattr *fattr); |
Trond Myklebust | af22f94 | 2007-08-10 17:45:10 -0400 | [diff] [blame] | 370 | extern int nfs_may_open(struct inode *inode, struct rpc_cred *cred, int openflags); |
| 371 | extern void nfs_access_zap_cache(struct inode *inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 372 | |
| 373 | /* |
| 374 | * linux/fs/nfs/symlink.c |
| 375 | */ |
Arjan van de Ven | c5ef1c4 | 2007-02-12 00:55:40 -0800 | [diff] [blame] | 376 | extern const struct inode_operations nfs_symlink_inode_operations; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 377 | |
| 378 | /* |
Trond Myklebust | a72b442 | 2006-01-03 09:55:41 +0100 | [diff] [blame] | 379 | * linux/fs/nfs/sysctl.c |
| 380 | */ |
| 381 | #ifdef CONFIG_SYSCTL |
| 382 | extern int nfs_register_sysctl(void); |
| 383 | extern void nfs_unregister_sysctl(void); |
| 384 | #else |
Stephen Rothwell | 7fd105e | 2006-02-20 18:28:08 -0800 | [diff] [blame] | 385 | #define nfs_register_sysctl() 0 |
Trond Myklebust | a72b442 | 2006-01-03 09:55:41 +0100 | [diff] [blame] | 386 | #define nfs_unregister_sysctl() do { } while(0) |
| 387 | #endif |
| 388 | |
| 389 | /* |
Trond Myklebust | 55a9759 | 2006-06-09 09:34:19 -0400 | [diff] [blame] | 390 | * linux/fs/nfs/namespace.c |
| 391 | */ |
Trond Myklebust | 51d8fa6 | 2006-06-09 09:34:20 -0400 | [diff] [blame] | 392 | extern struct list_head nfs_automount_list; |
Arjan van de Ven | c5ef1c4 | 2007-02-12 00:55:40 -0800 | [diff] [blame] | 393 | extern const struct inode_operations nfs_mountpoint_inode_operations; |
| 394 | extern const struct inode_operations nfs_referral_inode_operations; |
Trond Myklebust | 51d8fa6 | 2006-06-09 09:34:20 -0400 | [diff] [blame] | 395 | extern int nfs_mountpoint_expiry_timeout; |
| 396 | extern void nfs_release_automount_timer(void); |
Trond Myklebust | 55a9759 | 2006-06-09 09:34:19 -0400 | [diff] [blame] | 397 | |
| 398 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 399 | * linux/fs/nfs/unlink.c |
| 400 | */ |
Trond Myklebust | e4eff1a | 2007-07-14 15:39:58 -0400 | [diff] [blame] | 401 | extern int nfs_async_unlink(struct inode *dir, struct dentry *dentry); |
| 402 | extern void nfs_complete_unlink(struct dentry *dentry, struct inode *); |
Trond Myklebust | 565277f | 2007-10-15 18:17:53 -0400 | [diff] [blame] | 403 | extern void nfs_block_sillyrename(struct dentry *dentry); |
| 404 | extern void nfs_unblock_sillyrename(struct dentry *dentry); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 405 | |
| 406 | /* |
| 407 | * linux/fs/nfs/write.c |
| 408 | */ |
Peter Zijlstra | 89a0914 | 2007-03-16 13:38:26 -0800 | [diff] [blame] | 409 | extern int nfs_congestion_kb; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 410 | extern int nfs_writepage(struct page *page, struct writeback_control *wbc); |
| 411 | extern int nfs_writepages(struct address_space *, struct writeback_control *); |
| 412 | extern int nfs_flush_incompatible(struct file *file, struct page *page); |
| 413 | extern int nfs_updatepage(struct file *, struct page *, unsigned int, unsigned int); |
Chuck Lever | 462d5b3 | 2006-03-20 13:44:32 -0500 | [diff] [blame] | 414 | extern int nfs_writeback_done(struct rpc_task *, struct nfs_write_data *); |
| 415 | extern void nfs_writedata_release(void *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 416 | |
| 417 | /* |
| 418 | * Try to write back everything synchronously (but check the |
| 419 | * return value!) |
| 420 | */ |
Trond Myklebust | 1c75950 | 2006-10-09 16:18:38 -0400 | [diff] [blame] | 421 | extern long nfs_sync_mapping_wait(struct address_space *, struct writeback_control *, int); |
Trond Myklebust | 1c75950 | 2006-10-09 16:18:38 -0400 | [diff] [blame] | 422 | extern int nfs_wb_all(struct inode *inode); |
Trond Myklebust | ed90ef5 | 2007-07-20 13:13:28 -0400 | [diff] [blame] | 423 | extern int nfs_wb_nocommit(struct inode *inode); |
Trond Myklebust | 1c75950 | 2006-10-09 16:18:38 -0400 | [diff] [blame] | 424 | extern int nfs_wb_page(struct inode *inode, struct page* page); |
Trond Myklebust | 1b3b4a1 | 2007-08-28 10:29:36 -0400 | [diff] [blame] | 425 | extern int nfs_wb_page_cancel(struct inode *inode, struct page* page); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 426 | #if defined(CONFIG_NFS_V3) || defined(CONFIG_NFS_V4) |
Trond Myklebust | 3da28eb | 2005-06-22 17:16:31 +0000 | [diff] [blame] | 427 | extern int nfs_commit_inode(struct inode *, int); |
Trond Myklebust | 8aca67f | 2006-11-13 16:23:44 -0500 | [diff] [blame] | 428 | extern struct nfs_write_data *nfs_commit_alloc(void); |
| 429 | extern void nfs_commit_free(struct nfs_write_data *wdata); |
Trond Myklebust | fad6149 | 2006-03-20 13:44:36 -0500 | [diff] [blame] | 430 | extern void nfs_commit_release(void *wdata); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 431 | #else |
| 432 | static inline int |
Trond Myklebust | 3da28eb | 2005-06-22 17:16:31 +0000 | [diff] [blame] | 433 | nfs_commit_inode(struct inode *inode, int how) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 434 | { |
| 435 | return 0; |
| 436 | } |
| 437 | #endif |
| 438 | |
| 439 | static inline int |
| 440 | nfs_have_writebacks(struct inode *inode) |
| 441 | { |
| 442 | return NFS_I(inode)->npages != 0; |
| 443 | } |
| 444 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 445 | /* |
Adrian Bunk | e4e2051 | 2006-08-03 15:07:47 -0400 | [diff] [blame] | 446 | * Allocate nfs_write_data structures |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 447 | */ |
Trond Myklebust | 8d5658c | 2007-04-10 09:26:35 -0400 | [diff] [blame] | 448 | extern struct nfs_write_data *nfs_writedata_alloc(unsigned int npages); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 449 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 450 | /* |
| 451 | * linux/fs/nfs/read.c |
| 452 | */ |
| 453 | extern int nfs_readpage(struct file *, struct page *); |
| 454 | extern int nfs_readpages(struct file *, struct address_space *, |
| 455 | struct list_head *, unsigned); |
Trond Myklebust | ec06c09 | 2006-03-20 13:44:27 -0500 | [diff] [blame] | 456 | extern int nfs_readpage_result(struct rpc_task *, struct nfs_read_data *); |
| 457 | extern void nfs_readdata_release(void *data); |
Trond Myklebust | 963d8fe | 2006-01-03 09:55:04 +0100 | [diff] [blame] | 458 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 459 | /* |
Adrian Bunk | e4e2051 | 2006-08-03 15:07:47 -0400 | [diff] [blame] | 460 | * Allocate nfs_read_data structures |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 461 | */ |
Trond Myklebust | 8d5658c | 2007-04-10 09:26:35 -0400 | [diff] [blame] | 462 | extern struct nfs_read_data *nfs_readdata_alloc(unsigned int npages); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 463 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 464 | /* |
Andreas Gruenbacher | b7fa055 | 2005-06-22 17:16:27 +0000 | [diff] [blame] | 465 | * linux/fs/nfs3proc.c |
| 466 | */ |
| 467 | #ifdef CONFIG_NFS_V3_ACL |
| 468 | extern struct posix_acl *nfs3_proc_getacl(struct inode *inode, int type); |
| 469 | extern int nfs3_proc_setacl(struct inode *inode, int type, |
| 470 | struct posix_acl *acl); |
Andreas Gruenbacher | 055ffbe | 2005-06-22 17:16:27 +0000 | [diff] [blame] | 471 | extern int nfs3_proc_set_default_acl(struct inode *dir, struct inode *inode, |
| 472 | mode_t mode); |
Andreas Gruenbacher | 5c6a9f7 | 2005-06-22 17:16:27 +0000 | [diff] [blame] | 473 | extern void nfs3_forget_cached_acls(struct inode *inode); |
Andreas Gruenbacher | 055ffbe | 2005-06-22 17:16:27 +0000 | [diff] [blame] | 474 | #else |
| 475 | static inline int nfs3_proc_set_default_acl(struct inode *dir, |
| 476 | struct inode *inode, |
| 477 | mode_t mode) |
| 478 | { |
| 479 | return 0; |
| 480 | } |
Andreas Gruenbacher | 5c6a9f7 | 2005-06-22 17:16:27 +0000 | [diff] [blame] | 481 | |
| 482 | static inline void nfs3_forget_cached_acls(struct inode *inode) |
| 483 | { |
| 484 | } |
Andreas Gruenbacher | b7fa055 | 2005-06-22 17:16:27 +0000 | [diff] [blame] | 485 | #endif /* CONFIG_NFS_V3_ACL */ |
| 486 | |
| 487 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 488 | * linux/fs/mount_clnt.c |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 489 | */ |
Chuck Lever | 3ea9730 | 2007-07-01 12:13:27 -0400 | [diff] [blame] | 490 | extern int nfs_mount(struct sockaddr *, size_t, char *, char *, |
| 491 | int, int, struct nfs_fh *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 492 | |
| 493 | /* |
| 494 | * inline functions |
| 495 | */ |
| 496 | |
Chuck Lever | 433c923 | 2007-07-01 12:12:14 -0400 | [diff] [blame] | 497 | static inline loff_t nfs_size_to_loff_t(__u64 size) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 498 | { |
Chuck Lever | 433c923 | 2007-07-01 12:12:14 -0400 | [diff] [blame] | 499 | if (size > (__u64) OFFSET_MAX - 1) |
| 500 | return OFFSET_MAX - 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 501 | return (loff_t) size; |
| 502 | } |
| 503 | |
| 504 | static inline ino_t |
| 505 | nfs_fileid_to_ino_t(u64 fileid) |
| 506 | { |
| 507 | ino_t ino = (ino_t) fileid; |
| 508 | if (sizeof(ino_t) < sizeof(u64)) |
| 509 | ino ^= fileid >> (sizeof(u64)-sizeof(ino_t)) * 8; |
| 510 | return ino; |
| 511 | } |
| 512 | |
| 513 | /* NFS root */ |
| 514 | |
| 515 | extern void * nfs_root_data(void); |
| 516 | |
| 517 | #define nfs_wait_event(clnt, wq, condition) \ |
| 518 | ({ \ |
| 519 | int __retval = 0; \ |
| 520 | if (clnt->cl_intr) { \ |
| 521 | sigset_t oldmask; \ |
| 522 | rpc_clnt_sigmask(clnt, &oldmask); \ |
| 523 | __retval = wait_event_interruptible(wq, condition); \ |
| 524 | rpc_clnt_sigunmask(clnt, &oldmask); \ |
| 525 | } else \ |
| 526 | wait_event(wq, condition); \ |
| 527 | __retval; \ |
| 528 | }) |
| 529 | |
| 530 | #define NFS_JUKEBOX_RETRY_TIME (5 * HZ) |
| 531 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 532 | #endif /* __KERNEL__ */ |
| 533 | |
| 534 | /* |
| 535 | * NFS debug flags |
| 536 | */ |
| 537 | #define NFSDBG_VFS 0x0001 |
| 538 | #define NFSDBG_DIRCACHE 0x0002 |
| 539 | #define NFSDBG_LOOKUPCACHE 0x0004 |
| 540 | #define NFSDBG_PAGECACHE 0x0008 |
| 541 | #define NFSDBG_PROC 0x0010 |
| 542 | #define NFSDBG_XDR 0x0020 |
| 543 | #define NFSDBG_FILE 0x0040 |
| 544 | #define NFSDBG_ROOT 0x0080 |
| 545 | #define NFSDBG_CALLBACK 0x0100 |
David Howells | 24c8dbb | 2006-08-22 20:06:10 -0400 | [diff] [blame] | 546 | #define NFSDBG_CLIENT 0x0200 |
Chuck Lever | f182899 | 2007-07-01 12:12:51 -0400 | [diff] [blame] | 547 | #define NFSDBG_MOUNT 0x0400 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 548 | #define NFSDBG_ALL 0xFFFF |
| 549 | |
| 550 | #ifdef __KERNEL__ |
Benny Halevy | 4dc2eae | 2006-12-20 22:29:46 +0200 | [diff] [blame] | 551 | |
| 552 | /* |
| 553 | * Enable debugging support for nfs client. |
| 554 | * Requires RPC_DEBUG. |
| 555 | */ |
| 556 | #ifdef RPC_DEBUG |
| 557 | # define NFS_DEBUG |
| 558 | #endif |
| 559 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 560 | # undef ifdebug |
| 561 | # ifdef NFS_DEBUG |
| 562 | # define ifdebug(fac) if (unlikely(nfs_debug & NFSDBG_##fac)) |
| 563 | # else |
| 564 | # define ifdebug(fac) if (0) |
| 565 | # endif |
| 566 | #endif /* __KERNEL */ |
| 567 | |
| 568 | #endif |