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> |
| 33 | #include <linux/mm.h> |
| 34 | #include <linux/pagemap.h> |
Trond Myklebust | 1c3c07e | 2006-07-25 11:28:18 -0400 | [diff] [blame] | 35 | #include <linux/rbtree.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | #include <linux/rwsem.h> |
| 37 | #include <linux/wait.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | #include <linux/sunrpc/debug.h> |
| 40 | #include <linux/sunrpc/auth.h> |
| 41 | #include <linux/sunrpc/clnt.h> |
| 42 | |
| 43 | #include <linux/nfs.h> |
| 44 | #include <linux/nfs2.h> |
| 45 | #include <linux/nfs3.h> |
| 46 | #include <linux/nfs4.h> |
| 47 | #include <linux/nfs_xdr.h> |
Trond Myklebust | 8b4bdcf | 2006-06-09 09:34:19 -0400 | [diff] [blame] | 48 | |
| 49 | #include <linux/nfs_fs_sb.h> |
| 50 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 51 | #include <linux/rwsem.h> |
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 { |
| 72 | atomic_t count; |
Trond Myklebust | b92dccf | 2006-03-20 13:44:03 -0500 | [diff] [blame] | 73 | struct vfsmount *vfsmnt; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 74 | struct dentry *dentry; |
| 75 | struct rpc_cred *cred; |
| 76 | struct nfs4_state *state; |
| 77 | fl_owner_t lockowner; |
| 78 | int mode; |
| 79 | int error; |
| 80 | |
| 81 | struct list_head list; |
Olivier Galibert | 00a9264 | 2005-06-22 17:16:29 +0000 | [diff] [blame] | 82 | |
Olivier Galibert | 00a9264 | 2005-06-22 17:16:29 +0000 | [diff] [blame] | 83 | __u64 dir_cookie; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 84 | }; |
| 85 | |
| 86 | /* |
| 87 | * NFSv4 delegation |
| 88 | */ |
| 89 | struct nfs_delegation; |
| 90 | |
Andreas Gruenbacher | 5c6a9f7 | 2005-06-22 17:16:27 +0000 | [diff] [blame] | 91 | struct posix_acl; |
| 92 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 93 | /* |
| 94 | * nfs fs inode data in memory |
| 95 | */ |
| 96 | struct nfs_inode { |
| 97 | /* |
| 98 | * The 64bit 'inode number' |
| 99 | */ |
| 100 | __u64 fileid; |
| 101 | |
| 102 | /* |
| 103 | * NFS file handle |
| 104 | */ |
| 105 | struct nfs_fh fh; |
| 106 | |
| 107 | /* |
| 108 | * Various flags |
| 109 | */ |
Chuck Lever | 412d582 | 2005-08-18 11:24:11 -0700 | [diff] [blame] | 110 | unsigned long flags; /* atomic bit ops */ |
| 111 | unsigned long cache_validity; /* bit mask */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 112 | |
| 113 | /* |
Goldwyn Rodrigues | 24bd68f | 2006-03-20 13:44:11 -0500 | [diff] [blame] | 114 | * read_cache_jiffies is when we started read-caching this inode. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 115 | * attrtimeo is for how long the cached information is assumed |
| 116 | * to be valid. A successful attribute revalidation doubles |
| 117 | * attrtimeo (up to acregmax/acdirmax), a failure resets it to |
| 118 | * acregmin/acdirmin. |
| 119 | * |
| 120 | * We need to revalidate the cached attrs for this inode if |
| 121 | * |
| 122 | * jiffies - read_cache_jiffies > attrtimeo |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 123 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 124 | unsigned long read_cache_jiffies; |
| 125 | unsigned long attrtimeo; |
| 126 | unsigned long attrtimeo_timestamp; |
| 127 | __u64 change_attr; /* v4 only */ |
| 128 | |
Trond Myklebust | 3380114 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 129 | unsigned long last_updated; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 130 | /* "Generation counter" for the attribute cache. This is |
| 131 | * bumped whenever we update the metadata on the |
| 132 | * server. |
| 133 | */ |
| 134 | unsigned long cache_change_attribute; |
| 135 | /* |
| 136 | * Counter indicating the number of outstanding requests that |
| 137 | * will cause a file data update. |
| 138 | */ |
| 139 | atomic_t data_updates; |
| 140 | |
Trond Myklebust | 1c3c07e | 2006-07-25 11:28:18 -0400 | [diff] [blame] | 141 | struct rb_root access_cache; |
Trond Myklebust | cfcea3e | 2006-07-25 11:28:18 -0400 | [diff] [blame] | 142 | struct list_head access_cache_entry_lru; |
| 143 | struct list_head access_cache_inode_lru; |
Andreas Gruenbacher | 5c6a9f7 | 2005-06-22 17:16:27 +0000 | [diff] [blame] | 144 | #ifdef CONFIG_NFS_V3_ACL |
| 145 | struct posix_acl *acl_access; |
| 146 | struct posix_acl *acl_default; |
| 147 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 148 | |
| 149 | /* |
| 150 | * This is the cookie verifier used for NFSv3 readdir |
| 151 | * operations |
| 152 | */ |
Al Viro | bc4785c | 2006-10-19 23:28:51 -0700 | [diff] [blame] | 153 | __be32 cookieverf[2]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 154 | |
| 155 | /* |
| 156 | * This is the list of dirty unwritten pages. |
| 157 | */ |
| 158 | spinlock_t req_lock; |
| 159 | struct list_head dirty; |
| 160 | struct list_head commit; |
| 161 | struct radix_tree_root nfs_page_tree; |
| 162 | |
| 163 | unsigned int ndirty, |
| 164 | ncommit, |
| 165 | npages; |
| 166 | |
| 167 | /* Open contexts for shared mmap writes */ |
| 168 | struct list_head open_files; |
| 169 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 170 | #ifdef CONFIG_NFS_V4 |
J. Bruce Fields | e50a1c2 | 2005-06-22 17:16:23 +0000 | [diff] [blame] | 171 | struct nfs4_cached_acl *nfs4_acl; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 172 | /* NFSv4 state */ |
| 173 | struct list_head open_states; |
| 174 | struct nfs_delegation *delegation; |
| 175 | int delegation_state; |
| 176 | struct rw_semaphore rwsem; |
| 177 | #endif /* CONFIG_NFS_V4*/ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 178 | struct inode vfs_inode; |
| 179 | }; |
| 180 | |
| 181 | /* |
Chuck Lever | 5529680 | 2005-08-18 11:24:09 -0700 | [diff] [blame] | 182 | * Cache validity bit flags |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 183 | */ |
Chuck Lever | 5529680 | 2005-08-18 11:24:09 -0700 | [diff] [blame] | 184 | #define NFS_INO_INVALID_ATTR 0x0001 /* cached attrs are invalid */ |
| 185 | #define NFS_INO_INVALID_DATA 0x0002 /* cached data is invalid */ |
| 186 | #define NFS_INO_INVALID_ATIME 0x0004 /* cached atime is invalid */ |
| 187 | #define NFS_INO_INVALID_ACCESS 0x0008 /* cached access cred invalid */ |
| 188 | #define NFS_INO_INVALID_ACL 0x0010 /* cached acls are invalid */ |
| 189 | #define NFS_INO_REVAL_PAGECACHE 0x0020 /* must revalidate pagecache */ |
| 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) |
| 210 | #define NFS_READTIME(inode) (NFS_I(inode)->read_cache_jiffies) |
| 211 | #define NFS_CHANGE_ATTR(inode) (NFS_I(inode)->change_attr) |
| 212 | #define NFS_ATTRTIMEO(inode) (NFS_I(inode)->attrtimeo) |
| 213 | #define NFS_MINATTRTIMEO(inode) \ |
| 214 | (S_ISDIR(inode->i_mode)? NFS_SERVER(inode)->acdirmin \ |
| 215 | : NFS_SERVER(inode)->acregmin) |
| 216 | #define NFS_MAXATTRTIMEO(inode) \ |
| 217 | (S_ISDIR(inode->i_mode)? NFS_SERVER(inode)->acdirmax \ |
| 218 | : NFS_SERVER(inode)->acregmax) |
| 219 | #define NFS_ATTRTIMEO_UPDATE(inode) (NFS_I(inode)->attrtimeo_timestamp) |
| 220 | |
| 221 | #define NFS_FLAGS(inode) (NFS_I(inode)->flags) |
Chuck Lever | 412d582 | 2005-08-18 11:24:11 -0700 | [diff] [blame] | 222 | #define NFS_STALE(inode) (test_bit(NFS_INO_STALE, &NFS_FLAGS(inode))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 223 | |
| 224 | #define NFS_FILEID(inode) (NFS_I(inode)->fileid) |
| 225 | |
| 226 | static inline int nfs_caches_unstable(struct inode *inode) |
| 227 | { |
| 228 | return atomic_read(&NFS_I(inode)->data_updates) != 0; |
| 229 | } |
| 230 | |
Trond Myklebust | decf491 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 231 | static inline void nfs_mark_for_revalidate(struct inode *inode) |
| 232 | { |
Trond Myklebust | 38478b2 | 2006-05-25 01:40:57 -0400 | [diff] [blame] | 233 | struct nfs_inode *nfsi = NFS_I(inode); |
| 234 | |
Trond Myklebust | decf491 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 235 | spin_lock(&inode->i_lock); |
Trond Myklebust | 38478b2 | 2006-05-25 01:40:57 -0400 | [diff] [blame] | 236 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS; |
| 237 | if (S_ISDIR(inode->i_mode)) |
| 238 | nfsi->cache_validity |= NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA; |
Trond Myklebust | decf491 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 239 | spin_unlock(&inode->i_lock); |
| 240 | } |
| 241 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 242 | static inline void NFS_CACHEINV(struct inode *inode) |
| 243 | { |
Trond Myklebust | decf491 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 244 | if (!nfs_caches_unstable(inode)) |
| 245 | nfs_mark_for_revalidate(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 246 | } |
| 247 | |
| 248 | static inline int nfs_server_capable(struct inode *inode, int cap) |
| 249 | { |
| 250 | return NFS_SERVER(inode)->caps & cap; |
| 251 | } |
| 252 | |
| 253 | static inline int NFS_USE_READDIRPLUS(struct inode *inode) |
| 254 | { |
Chuck Lever | 412d582 | 2005-08-18 11:24:11 -0700 | [diff] [blame] | 255 | return test_bit(NFS_INO_ADVISE_RDPLUS, &NFS_FLAGS(inode)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 256 | } |
| 257 | |
| 258 | /** |
| 259 | * nfs_save_change_attribute - Returns the inode attribute change cookie |
| 260 | * @inode - pointer to inode |
| 261 | * The "change attribute" is updated every time we finish an operation |
| 262 | * that will result in a metadata change on the server. |
| 263 | */ |
| 264 | static inline long nfs_save_change_attribute(struct inode *inode) |
| 265 | { |
| 266 | return NFS_I(inode)->cache_change_attribute; |
| 267 | } |
| 268 | |
| 269 | /** |
| 270 | * nfs_verify_change_attribute - Detects NFS inode cache updates |
| 271 | * @inode - pointer to inode |
| 272 | * @chattr - previously saved change attribute |
| 273 | * Return "false" if metadata has been updated (or is in the process of |
| 274 | * being updated) since the change attribute was saved. |
| 275 | */ |
| 276 | static inline int nfs_verify_change_attribute(struct inode *inode, unsigned long chattr) |
| 277 | { |
| 278 | return !nfs_caches_unstable(inode) |
Trond Myklebust | 913a70f | 2005-10-27 22:12:38 -0400 | [diff] [blame] | 279 | && time_after_eq(chattr, NFS_I(inode)->cache_change_attribute); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 280 | } |
| 281 | |
| 282 | /* |
| 283 | * linux/fs/nfs/inode.c |
| 284 | */ |
Trond Myklebust | 29884df | 2005-12-13 16:13:54 -0500 | [diff] [blame] | 285 | extern int nfs_sync_mapping(struct address_space *mapping); |
Trond Myklebust | cd9ae2b | 2006-10-19 23:28:40 -0700 | [diff] [blame] | 286 | extern void nfs_zap_mapping(struct inode *inode, struct address_space *mapping); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 287 | extern void nfs_zap_caches(struct inode *); |
| 288 | extern struct inode *nfs_fhget(struct super_block *, struct nfs_fh *, |
| 289 | struct nfs_fattr *); |
| 290 | extern int nfs_refresh_inode(struct inode *, struct nfs_fattr *); |
Trond Myklebust | decf491 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 291 | extern int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 292 | extern int nfs_getattr(struct vfsmount *, struct dentry *, struct kstat *); |
| 293 | extern int nfs_permission(struct inode *, int, struct nameidata *); |
| 294 | extern int nfs_access_get_cached(struct inode *, struct rpc_cred *, struct nfs_access_entry *); |
| 295 | extern void nfs_access_add_cache(struct inode *, struct nfs_access_entry *); |
Trond Myklebust | 1c3c07e | 2006-07-25 11:28:18 -0400 | [diff] [blame] | 296 | extern void nfs_access_zap_cache(struct inode *inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 297 | extern int nfs_open(struct inode *, struct file *); |
| 298 | extern int nfs_release(struct inode *, struct file *); |
| 299 | extern int nfs_attribute_timeout(struct inode *inode); |
| 300 | extern int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode); |
| 301 | extern int __nfs_revalidate_inode(struct nfs_server *, struct inode *); |
Trond Myklebust | 44b1187 | 2006-05-25 01:40:59 -0400 | [diff] [blame] | 302 | extern int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping); |
Trond Myklebust | 717d44e | 2007-01-24 11:54:55 -0800 | [diff] [blame] | 303 | 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] | 304 | extern int nfs_setattr(struct dentry *, struct iattr *); |
Trond Myklebust | 65e4308 | 2005-08-16 11:49:44 -0400 | [diff] [blame] | 305 | extern void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 306 | extern void nfs_begin_attr_update(struct inode *); |
| 307 | extern void nfs_end_attr_update(struct inode *); |
| 308 | extern void nfs_begin_data_update(struct inode *); |
| 309 | extern void nfs_end_data_update(struct inode *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 310 | extern struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx); |
| 311 | extern void put_nfs_open_context(struct nfs_open_context *ctx); |
Trond Myklebust | d530838 | 2005-11-04 15:33:38 -0500 | [diff] [blame] | 312 | extern 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] | 313 | |
| 314 | /* 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] | 315 | extern __be32 root_nfs_parse_addr(char *name); /*__init*/ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 316 | |
Trond Myklebust | 0e574af | 2005-10-27 22:12:38 -0400 | [diff] [blame] | 317 | static inline void nfs_fattr_init(struct nfs_fattr *fattr) |
| 318 | { |
| 319 | fattr->valid = 0; |
Trond Myklebust | 3380114 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 320 | fattr->time_start = jiffies; |
Trond Myklebust | 0e574af | 2005-10-27 22:12:38 -0400 | [diff] [blame] | 321 | } |
| 322 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 323 | /* |
| 324 | * linux/fs/nfs/file.c |
| 325 | */ |
Arjan van de Ven | c5ef1c4 | 2007-02-12 00:55:40 -0800 | [diff] [blame] | 326 | extern const struct inode_operations nfs_file_inode_operations; |
Andreas Gruenbacher | b7fa055 | 2005-06-22 17:16:27 +0000 | [diff] [blame] | 327 | #ifdef CONFIG_NFS_V3 |
Arjan van de Ven | c5ef1c4 | 2007-02-12 00:55:40 -0800 | [diff] [blame] | 328 | extern const struct inode_operations nfs3_file_inode_operations; |
Andreas Gruenbacher | b7fa055 | 2005-06-22 17:16:27 +0000 | [diff] [blame] | 329 | #endif /* CONFIG_NFS_V3 */ |
Arjan van de Ven | 4b6f5d2 | 2006-03-28 01:56:42 -0800 | [diff] [blame] | 330 | extern const struct file_operations nfs_file_operations; |
Christoph Hellwig | f5e54d6 | 2006-06-28 04:26:44 -0700 | [diff] [blame] | 331 | extern const struct address_space_operations nfs_file_aops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 332 | |
| 333 | static inline struct rpc_cred *nfs_file_cred(struct file *file) |
| 334 | { |
| 335 | if (file != NULL) { |
| 336 | struct nfs_open_context *ctx; |
| 337 | |
| 338 | ctx = (struct nfs_open_context*)file->private_data; |
| 339 | return ctx->cred; |
| 340 | } |
| 341 | return NULL; |
| 342 | } |
| 343 | |
| 344 | /* |
Andreas Gruenbacher | b7fa055 | 2005-06-22 17:16:27 +0000 | [diff] [blame] | 345 | * linux/fs/nfs/xattr.c |
| 346 | */ |
| 347 | #ifdef CONFIG_NFS_V3_ACL |
| 348 | extern ssize_t nfs3_listxattr(struct dentry *, char *, size_t); |
| 349 | extern ssize_t nfs3_getxattr(struct dentry *, const char *, void *, size_t); |
| 350 | extern int nfs3_setxattr(struct dentry *, const char *, |
| 351 | const void *, size_t, int); |
| 352 | extern int nfs3_removexattr (struct dentry *, const char *name); |
| 353 | #else |
| 354 | # define nfs3_listxattr NULL |
| 355 | # define nfs3_getxattr NULL |
| 356 | # define nfs3_setxattr NULL |
| 357 | # define nfs3_removexattr NULL |
| 358 | #endif |
| 359 | |
| 360 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 361 | * linux/fs/nfs/direct.c |
| 362 | */ |
| 363 | extern ssize_t nfs_direct_IO(int, struct kiocb *, const struct iovec *, loff_t, |
| 364 | unsigned long); |
Badari Pulavarty | 027445c | 2006-09-30 23:28:46 -0700 | [diff] [blame] | 365 | extern ssize_t nfs_file_direct_read(struct kiocb *iocb, |
| 366 | const struct iovec *iov, unsigned long nr_segs, |
| 367 | loff_t pos); |
| 368 | extern ssize_t nfs_file_direct_write(struct kiocb *iocb, |
| 369 | const struct iovec *iov, unsigned long nr_segs, |
| 370 | loff_t pos); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 371 | |
| 372 | /* |
| 373 | * linux/fs/nfs/dir.c |
| 374 | */ |
Arjan van de Ven | c5ef1c4 | 2007-02-12 00:55:40 -0800 | [diff] [blame] | 375 | extern const struct inode_operations nfs_dir_inode_operations; |
Andreas Gruenbacher | b7fa055 | 2005-06-22 17:16:27 +0000 | [diff] [blame] | 376 | #ifdef CONFIG_NFS_V3 |
Arjan van de Ven | c5ef1c4 | 2007-02-12 00:55:40 -0800 | [diff] [blame] | 377 | extern const struct inode_operations nfs3_dir_inode_operations; |
Andreas Gruenbacher | b7fa055 | 2005-06-22 17:16:27 +0000 | [diff] [blame] | 378 | #endif /* CONFIG_NFS_V3 */ |
Arjan van de Ven | 4b6f5d2 | 2006-03-28 01:56:42 -0800 | [diff] [blame] | 379 | extern const struct file_operations nfs_dir_operations; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 380 | extern struct dentry_operations nfs_dentry_operations; |
| 381 | |
| 382 | extern int nfs_instantiate(struct dentry *dentry, struct nfs_fh *fh, struct nfs_fattr *fattr); |
| 383 | |
| 384 | /* |
| 385 | * linux/fs/nfs/symlink.c |
| 386 | */ |
Arjan van de Ven | c5ef1c4 | 2007-02-12 00:55:40 -0800 | [diff] [blame] | 387 | extern const struct inode_operations nfs_symlink_inode_operations; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 388 | |
| 389 | /* |
Trond Myklebust | a72b442 | 2006-01-03 09:55:41 +0100 | [diff] [blame] | 390 | * linux/fs/nfs/sysctl.c |
| 391 | */ |
| 392 | #ifdef CONFIG_SYSCTL |
| 393 | extern int nfs_register_sysctl(void); |
| 394 | extern void nfs_unregister_sysctl(void); |
| 395 | #else |
Stephen Rothwell | 7fd105e | 2006-02-20 18:28:08 -0800 | [diff] [blame] | 396 | #define nfs_register_sysctl() 0 |
Trond Myklebust | a72b442 | 2006-01-03 09:55:41 +0100 | [diff] [blame] | 397 | #define nfs_unregister_sysctl() do { } while(0) |
| 398 | #endif |
| 399 | |
| 400 | /* |
Trond Myklebust | 55a9759 | 2006-06-09 09:34:19 -0400 | [diff] [blame] | 401 | * linux/fs/nfs/namespace.c |
| 402 | */ |
Trond Myklebust | 51d8fa6 | 2006-06-09 09:34:20 -0400 | [diff] [blame] | 403 | extern struct list_head nfs_automount_list; |
Arjan van de Ven | c5ef1c4 | 2007-02-12 00:55:40 -0800 | [diff] [blame] | 404 | extern const struct inode_operations nfs_mountpoint_inode_operations; |
| 405 | extern const struct inode_operations nfs_referral_inode_operations; |
Trond Myklebust | 51d8fa6 | 2006-06-09 09:34:20 -0400 | [diff] [blame] | 406 | extern int nfs_mountpoint_expiry_timeout; |
| 407 | extern void nfs_release_automount_timer(void); |
Trond Myklebust | 55a9759 | 2006-06-09 09:34:19 -0400 | [diff] [blame] | 408 | |
| 409 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 410 | * linux/fs/nfs/unlink.c |
| 411 | */ |
| 412 | extern int nfs_async_unlink(struct dentry *); |
| 413 | extern void nfs_complete_unlink(struct dentry *); |
| 414 | |
| 415 | /* |
| 416 | * linux/fs/nfs/write.c |
| 417 | */ |
| 418 | extern int nfs_writepage(struct page *page, struct writeback_control *wbc); |
| 419 | extern int nfs_writepages(struct address_space *, struct writeback_control *); |
| 420 | extern int nfs_flush_incompatible(struct file *file, struct page *page); |
| 421 | extern int nfs_updatepage(struct file *, struct page *, unsigned int, unsigned int); |
Chuck Lever | 462d5b3 | 2006-03-20 13:44:32 -0500 | [diff] [blame] | 422 | extern int nfs_writeback_done(struct rpc_task *, struct nfs_write_data *); |
| 423 | extern void nfs_writedata_release(void *); |
Trond Myklebust | 1a54533 | 2006-12-05 00:35:40 -0500 | [diff] [blame] | 424 | extern int nfs_set_page_dirty(struct page *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 425 | |
| 426 | /* |
| 427 | * Try to write back everything synchronously (but check the |
| 428 | * return value!) |
| 429 | */ |
Trond Myklebust | 1c75950 | 2006-10-09 16:18:38 -0400 | [diff] [blame] | 430 | extern long nfs_sync_mapping_wait(struct address_space *, struct writeback_control *, int); |
| 431 | extern int nfs_sync_mapping_range(struct address_space *, loff_t, loff_t, int); |
| 432 | extern int nfs_wb_all(struct inode *inode); |
| 433 | extern int nfs_wb_page(struct inode *inode, struct page* page); |
Trond Myklebust | 61822ab | 2006-12-05 00:35:42 -0500 | [diff] [blame] | 434 | extern int nfs_wb_page_priority(struct inode *inode, struct page* page, int how); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 435 | #if defined(CONFIG_NFS_V3) || defined(CONFIG_NFS_V4) |
Trond Myklebust | 3da28eb | 2005-06-22 17:16:31 +0000 | [diff] [blame] | 436 | extern int nfs_commit_inode(struct inode *, int); |
Trond Myklebust | 8aca67f | 2006-11-13 16:23:44 -0500 | [diff] [blame] | 437 | extern struct nfs_write_data *nfs_commit_alloc(void); |
| 438 | extern void nfs_commit_free(struct nfs_write_data *wdata); |
Trond Myklebust | fad6149 | 2006-03-20 13:44:36 -0500 | [diff] [blame] | 439 | extern void nfs_commit_release(void *wdata); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 440 | #else |
| 441 | static inline int |
Trond Myklebust | 3da28eb | 2005-06-22 17:16:31 +0000 | [diff] [blame] | 442 | nfs_commit_inode(struct inode *inode, int how) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 443 | { |
| 444 | return 0; |
| 445 | } |
| 446 | #endif |
| 447 | |
| 448 | static inline int |
| 449 | nfs_have_writebacks(struct inode *inode) |
| 450 | { |
| 451 | return NFS_I(inode)->npages != 0; |
| 452 | } |
| 453 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 454 | /* |
Adrian Bunk | e4e2051 | 2006-08-03 15:07:47 -0400 | [diff] [blame] | 455 | * Allocate nfs_write_data structures |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 456 | */ |
Trond Myklebust | e9f7bee | 2006-09-08 09:48:54 -0700 | [diff] [blame] | 457 | extern struct nfs_write_data *nfs_writedata_alloc(size_t len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 458 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 459 | /* |
| 460 | * linux/fs/nfs/read.c |
| 461 | */ |
| 462 | extern int nfs_readpage(struct file *, struct page *); |
| 463 | extern int nfs_readpages(struct file *, struct address_space *, |
| 464 | struct list_head *, unsigned); |
Trond Myklebust | ec06c09 | 2006-03-20 13:44:27 -0500 | [diff] [blame] | 465 | extern int nfs_readpage_result(struct rpc_task *, struct nfs_read_data *); |
| 466 | extern void nfs_readdata_release(void *data); |
Trond Myklebust | 963d8fe | 2006-01-03 09:55:04 +0100 | [diff] [blame] | 467 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 468 | /* |
Adrian Bunk | e4e2051 | 2006-08-03 15:07:47 -0400 | [diff] [blame] | 469 | * Allocate nfs_read_data structures |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 470 | */ |
Trond Myklebust | e9f7bee | 2006-09-08 09:48:54 -0700 | [diff] [blame] | 471 | extern struct nfs_read_data *nfs_readdata_alloc(size_t len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 472 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 473 | /* |
Andreas Gruenbacher | b7fa055 | 2005-06-22 17:16:27 +0000 | [diff] [blame] | 474 | * linux/fs/nfs3proc.c |
| 475 | */ |
| 476 | #ifdef CONFIG_NFS_V3_ACL |
| 477 | extern struct posix_acl *nfs3_proc_getacl(struct inode *inode, int type); |
| 478 | extern int nfs3_proc_setacl(struct inode *inode, int type, |
| 479 | struct posix_acl *acl); |
Andreas Gruenbacher | 055ffbe | 2005-06-22 17:16:27 +0000 | [diff] [blame] | 480 | extern int nfs3_proc_set_default_acl(struct inode *dir, struct inode *inode, |
| 481 | mode_t mode); |
Andreas Gruenbacher | 5c6a9f7 | 2005-06-22 17:16:27 +0000 | [diff] [blame] | 482 | extern void nfs3_forget_cached_acls(struct inode *inode); |
Andreas Gruenbacher | 055ffbe | 2005-06-22 17:16:27 +0000 | [diff] [blame] | 483 | #else |
| 484 | static inline int nfs3_proc_set_default_acl(struct inode *dir, |
| 485 | struct inode *inode, |
| 486 | mode_t mode) |
| 487 | { |
| 488 | return 0; |
| 489 | } |
Andreas Gruenbacher | 5c6a9f7 | 2005-06-22 17:16:27 +0000 | [diff] [blame] | 490 | |
| 491 | static inline void nfs3_forget_cached_acls(struct inode *inode) |
| 492 | { |
| 493 | } |
Andreas Gruenbacher | b7fa055 | 2005-06-22 17:16:27 +0000 | [diff] [blame] | 494 | #endif /* CONFIG_NFS_V3_ACL */ |
| 495 | |
| 496 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 497 | * linux/fs/mount_clnt.c |
| 498 | * (Used only by nfsroot module) |
| 499 | */ |
| 500 | extern int nfsroot_mount(struct sockaddr_in *, char *, struct nfs_fh *, |
| 501 | int, int); |
| 502 | |
| 503 | /* |
| 504 | * inline functions |
| 505 | */ |
| 506 | |
| 507 | static inline loff_t |
| 508 | nfs_size_to_loff_t(__u64 size) |
| 509 | { |
| 510 | loff_t maxsz = (((loff_t) ULONG_MAX) << PAGE_CACHE_SHIFT) + PAGE_CACHE_SIZE - 1; |
| 511 | if (size > maxsz) |
| 512 | return maxsz; |
| 513 | return (loff_t) size; |
| 514 | } |
| 515 | |
| 516 | static inline ino_t |
| 517 | nfs_fileid_to_ino_t(u64 fileid) |
| 518 | { |
| 519 | ino_t ino = (ino_t) fileid; |
| 520 | if (sizeof(ino_t) < sizeof(u64)) |
| 521 | ino ^= fileid >> (sizeof(u64)-sizeof(ino_t)) * 8; |
| 522 | return ino; |
| 523 | } |
| 524 | |
| 525 | /* NFS root */ |
| 526 | |
| 527 | extern void * nfs_root_data(void); |
| 528 | |
| 529 | #define nfs_wait_event(clnt, wq, condition) \ |
| 530 | ({ \ |
| 531 | int __retval = 0; \ |
| 532 | if (clnt->cl_intr) { \ |
| 533 | sigset_t oldmask; \ |
| 534 | rpc_clnt_sigmask(clnt, &oldmask); \ |
| 535 | __retval = wait_event_interruptible(wq, condition); \ |
| 536 | rpc_clnt_sigunmask(clnt, &oldmask); \ |
| 537 | } else \ |
| 538 | wait_event(wq, condition); \ |
| 539 | __retval; \ |
| 540 | }) |
| 541 | |
| 542 | #define NFS_JUKEBOX_RETRY_TIME (5 * HZ) |
| 543 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 544 | #endif /* __KERNEL__ */ |
| 545 | |
| 546 | /* |
| 547 | * NFS debug flags |
| 548 | */ |
| 549 | #define NFSDBG_VFS 0x0001 |
| 550 | #define NFSDBG_DIRCACHE 0x0002 |
| 551 | #define NFSDBG_LOOKUPCACHE 0x0004 |
| 552 | #define NFSDBG_PAGECACHE 0x0008 |
| 553 | #define NFSDBG_PROC 0x0010 |
| 554 | #define NFSDBG_XDR 0x0020 |
| 555 | #define NFSDBG_FILE 0x0040 |
| 556 | #define NFSDBG_ROOT 0x0080 |
| 557 | #define NFSDBG_CALLBACK 0x0100 |
David Howells | 24c8dbb | 2006-08-22 20:06:10 -0400 | [diff] [blame] | 558 | #define NFSDBG_CLIENT 0x0200 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 559 | #define NFSDBG_ALL 0xFFFF |
| 560 | |
| 561 | #ifdef __KERNEL__ |
Benny Halevy | 4dc2eae | 2006-12-20 22:29:46 +0200 | [diff] [blame] | 562 | |
| 563 | /* |
| 564 | * Enable debugging support for nfs client. |
| 565 | * Requires RPC_DEBUG. |
| 566 | */ |
| 567 | #ifdef RPC_DEBUG |
| 568 | # define NFS_DEBUG |
| 569 | #endif |
| 570 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 571 | # undef ifdebug |
| 572 | # ifdef NFS_DEBUG |
| 573 | # define ifdebug(fac) if (unlikely(nfs_debug & NFSDBG_##fac)) |
| 574 | # else |
| 575 | # define ifdebug(fac) if (0) |
| 576 | # endif |
| 577 | #endif /* __KERNEL */ |
| 578 | |
| 579 | #endif |