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 | |
| 12 | #include <linux/config.h> |
| 13 | #include <linux/in.h> |
| 14 | #include <linux/mm.h> |
| 15 | #include <linux/pagemap.h> |
| 16 | #include <linux/rwsem.h> |
| 17 | #include <linux/wait.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 18 | |
| 19 | #include <linux/nfs_fs_sb.h> |
| 20 | |
| 21 | #include <linux/sunrpc/debug.h> |
| 22 | #include <linux/sunrpc/auth.h> |
| 23 | #include <linux/sunrpc/clnt.h> |
| 24 | |
| 25 | #include <linux/nfs.h> |
| 26 | #include <linux/nfs2.h> |
| 27 | #include <linux/nfs3.h> |
| 28 | #include <linux/nfs4.h> |
| 29 | #include <linux/nfs_xdr.h> |
| 30 | #include <linux/rwsem.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 31 | #include <linux/mempool.h> |
| 32 | |
| 33 | /* |
| 34 | * Enable debugging support for nfs client. |
| 35 | * Requires RPC_DEBUG. |
| 36 | */ |
| 37 | #ifdef RPC_DEBUG |
| 38 | # define NFS_DEBUG |
| 39 | #endif |
| 40 | |
| 41 | #define NFS_MAX_FILE_IO_BUFFER_SIZE 32768 |
| 42 | #define NFS_DEF_FILE_IO_BUFFER_SIZE 4096 |
| 43 | |
Chuck Lever | 03bf4b7 | 2005-08-25 16:25:55 -0700 | [diff] [blame] | 44 | /* Default timeout values */ |
| 45 | #define NFS_MAX_UDP_TIMEOUT (60*HZ) |
| 46 | #define NFS_MAX_TCP_TIMEOUT (600*HZ) |
| 47 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 48 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | * superblock magic number for NFS |
| 50 | */ |
| 51 | #define NFS_SUPER_MAGIC 0x6969 |
| 52 | |
| 53 | /* |
| 54 | * These are the default flags for swap requests |
| 55 | */ |
| 56 | #define NFS_RPC_SWAPFLAGS (RPC_TASK_SWAPPER|RPC_TASK_ROOTCREDS) |
| 57 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 58 | /* |
| 59 | * When flushing a cluster of dirty pages, there can be different |
| 60 | * strategies: |
| 61 | */ |
| 62 | #define FLUSH_AGING 0 /* only flush old buffers */ |
| 63 | #define FLUSH_SYNC 1 /* file being synced, or contention */ |
| 64 | #define FLUSH_WAIT 2 /* wait for completion */ |
| 65 | #define FLUSH_STABLE 4 /* commit to stable storage */ |
| 66 | #define FLUSH_LOWPRI 8 /* low priority background flush */ |
| 67 | #define FLUSH_HIGHPRI 16 /* high priority memory reclaim flush */ |
| 68 | |
| 69 | #ifdef __KERNEL__ |
| 70 | |
| 71 | /* |
| 72 | * NFSv3/v4 Access mode cache entry |
| 73 | */ |
| 74 | struct nfs_access_entry { |
| 75 | unsigned long jiffies; |
| 76 | struct rpc_cred * cred; |
| 77 | int mask; |
| 78 | }; |
| 79 | |
| 80 | struct nfs4_state; |
| 81 | struct nfs_open_context { |
| 82 | atomic_t count; |
| 83 | struct dentry *dentry; |
| 84 | struct rpc_cred *cred; |
| 85 | struct nfs4_state *state; |
| 86 | fl_owner_t lockowner; |
| 87 | int mode; |
| 88 | int error; |
| 89 | |
| 90 | struct list_head list; |
Olivier Galibert | 00a9264 | 2005-06-22 17:16:29 +0000 | [diff] [blame] | 91 | |
Olivier Galibert | 00a9264 | 2005-06-22 17:16:29 +0000 | [diff] [blame] | 92 | __u64 dir_cookie; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 93 | }; |
| 94 | |
| 95 | /* |
| 96 | * NFSv4 delegation |
| 97 | */ |
| 98 | struct nfs_delegation; |
| 99 | |
Andreas Gruenbacher | 5c6a9f7 | 2005-06-22 17:16:27 +0000 | [diff] [blame] | 100 | struct posix_acl; |
| 101 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 102 | /* |
| 103 | * nfs fs inode data in memory |
| 104 | */ |
| 105 | struct nfs_inode { |
| 106 | /* |
| 107 | * The 64bit 'inode number' |
| 108 | */ |
| 109 | __u64 fileid; |
| 110 | |
| 111 | /* |
| 112 | * NFS file handle |
| 113 | */ |
| 114 | struct nfs_fh fh; |
| 115 | |
| 116 | /* |
| 117 | * Various flags |
| 118 | */ |
Chuck Lever | 412d582 | 2005-08-18 11:24:11 -0700 | [diff] [blame] | 119 | unsigned long flags; /* atomic bit ops */ |
| 120 | unsigned long cache_validity; /* bit mask */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 121 | |
| 122 | /* |
| 123 | * read_cache_jiffies is when we started read-caching this inode, |
| 124 | * and read_cache_mtime is the mtime of the inode at that time. |
| 125 | * attrtimeo is for how long the cached information is assumed |
| 126 | * to be valid. A successful attribute revalidation doubles |
| 127 | * attrtimeo (up to acregmax/acdirmax), a failure resets it to |
| 128 | * acregmin/acdirmin. |
| 129 | * |
| 130 | * We need to revalidate the cached attrs for this inode if |
| 131 | * |
| 132 | * jiffies - read_cache_jiffies > attrtimeo |
| 133 | * |
| 134 | * and invalidate any cached data/flush out any dirty pages if |
| 135 | * we find that |
| 136 | * |
| 137 | * mtime != read_cache_mtime |
| 138 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 139 | unsigned long read_cache_jiffies; |
| 140 | unsigned long attrtimeo; |
| 141 | unsigned long attrtimeo_timestamp; |
| 142 | __u64 change_attr; /* v4 only */ |
| 143 | |
Trond Myklebust | 3380114 | 2005-10-27 22:12:39 -0400 | [diff] [blame^] | 144 | unsigned long last_updated; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 145 | /* "Generation counter" for the attribute cache. This is |
| 146 | * bumped whenever we update the metadata on the |
| 147 | * server. |
| 148 | */ |
| 149 | unsigned long cache_change_attribute; |
| 150 | /* |
| 151 | * Counter indicating the number of outstanding requests that |
| 152 | * will cause a file data update. |
| 153 | */ |
| 154 | atomic_t data_updates; |
| 155 | |
| 156 | struct nfs_access_entry cache_access; |
Andreas Gruenbacher | 5c6a9f7 | 2005-06-22 17:16:27 +0000 | [diff] [blame] | 157 | #ifdef CONFIG_NFS_V3_ACL |
| 158 | struct posix_acl *acl_access; |
| 159 | struct posix_acl *acl_default; |
| 160 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 161 | |
| 162 | /* |
| 163 | * This is the cookie verifier used for NFSv3 readdir |
| 164 | * operations |
| 165 | */ |
| 166 | __u32 cookieverf[2]; |
| 167 | |
| 168 | /* |
| 169 | * This is the list of dirty unwritten pages. |
| 170 | */ |
| 171 | spinlock_t req_lock; |
| 172 | struct list_head dirty; |
| 173 | struct list_head commit; |
| 174 | struct radix_tree_root nfs_page_tree; |
| 175 | |
| 176 | unsigned int ndirty, |
| 177 | ncommit, |
| 178 | npages; |
| 179 | |
| 180 | /* Open contexts for shared mmap writes */ |
| 181 | struct list_head open_files; |
| 182 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 183 | #ifdef CONFIG_NFS_V4 |
J. Bruce Fields | e50a1c2 | 2005-06-22 17:16:23 +0000 | [diff] [blame] | 184 | struct nfs4_cached_acl *nfs4_acl; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 185 | /* NFSv4 state */ |
| 186 | struct list_head open_states; |
| 187 | struct nfs_delegation *delegation; |
| 188 | int delegation_state; |
| 189 | struct rw_semaphore rwsem; |
| 190 | #endif /* CONFIG_NFS_V4*/ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 191 | struct inode vfs_inode; |
| 192 | }; |
| 193 | |
| 194 | /* |
Chuck Lever | 5529680 | 2005-08-18 11:24:09 -0700 | [diff] [blame] | 195 | * Cache validity bit flags |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 196 | */ |
Chuck Lever | 5529680 | 2005-08-18 11:24:09 -0700 | [diff] [blame] | 197 | #define NFS_INO_INVALID_ATTR 0x0001 /* cached attrs are invalid */ |
| 198 | #define NFS_INO_INVALID_DATA 0x0002 /* cached data is invalid */ |
| 199 | #define NFS_INO_INVALID_ATIME 0x0004 /* cached atime is invalid */ |
| 200 | #define NFS_INO_INVALID_ACCESS 0x0008 /* cached access cred invalid */ |
| 201 | #define NFS_INO_INVALID_ACL 0x0010 /* cached acls are invalid */ |
| 202 | #define NFS_INO_REVAL_PAGECACHE 0x0020 /* must revalidate pagecache */ |
| 203 | |
| 204 | /* |
Chuck Lever | 412d582 | 2005-08-18 11:24:11 -0700 | [diff] [blame] | 205 | * Bit offsets in flags field |
Chuck Lever | 5529680 | 2005-08-18 11:24:09 -0700 | [diff] [blame] | 206 | */ |
Chuck Lever | 412d582 | 2005-08-18 11:24:11 -0700 | [diff] [blame] | 207 | #define NFS_INO_REVALIDATING (0) /* revalidating attrs */ |
| 208 | #define NFS_INO_ADVISE_RDPLUS (1) /* advise readdirplus */ |
| 209 | #define NFS_INO_STALE (2) /* possible stale inode */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 210 | |
| 211 | static inline struct nfs_inode *NFS_I(struct inode *inode) |
| 212 | { |
| 213 | return container_of(inode, struct nfs_inode, vfs_inode); |
| 214 | } |
| 215 | #define NFS_SB(s) ((struct nfs_server *)(s->s_fs_info)) |
| 216 | |
| 217 | #define NFS_FH(inode) (&NFS_I(inode)->fh) |
| 218 | #define NFS_SERVER(inode) (NFS_SB(inode->i_sb)) |
| 219 | #define NFS_CLIENT(inode) (NFS_SERVER(inode)->client) |
| 220 | #define NFS_PROTO(inode) (NFS_SERVER(inode)->rpc_ops) |
| 221 | #define NFS_ADDR(inode) (RPC_PEERADDR(NFS_CLIENT(inode))) |
| 222 | #define NFS_COOKIEVERF(inode) (NFS_I(inode)->cookieverf) |
| 223 | #define NFS_READTIME(inode) (NFS_I(inode)->read_cache_jiffies) |
| 224 | #define NFS_CHANGE_ATTR(inode) (NFS_I(inode)->change_attr) |
| 225 | #define NFS_ATTRTIMEO(inode) (NFS_I(inode)->attrtimeo) |
| 226 | #define NFS_MINATTRTIMEO(inode) \ |
| 227 | (S_ISDIR(inode->i_mode)? NFS_SERVER(inode)->acdirmin \ |
| 228 | : NFS_SERVER(inode)->acregmin) |
| 229 | #define NFS_MAXATTRTIMEO(inode) \ |
| 230 | (S_ISDIR(inode->i_mode)? NFS_SERVER(inode)->acdirmax \ |
| 231 | : NFS_SERVER(inode)->acregmax) |
| 232 | #define NFS_ATTRTIMEO_UPDATE(inode) (NFS_I(inode)->attrtimeo_timestamp) |
| 233 | |
| 234 | #define NFS_FLAGS(inode) (NFS_I(inode)->flags) |
Chuck Lever | 412d582 | 2005-08-18 11:24:11 -0700 | [diff] [blame] | 235 | #define NFS_STALE(inode) (test_bit(NFS_INO_STALE, &NFS_FLAGS(inode))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 236 | |
| 237 | #define NFS_FILEID(inode) (NFS_I(inode)->fileid) |
| 238 | |
| 239 | static inline int nfs_caches_unstable(struct inode *inode) |
| 240 | { |
| 241 | return atomic_read(&NFS_I(inode)->data_updates) != 0; |
| 242 | } |
| 243 | |
| 244 | static inline void NFS_CACHEINV(struct inode *inode) |
| 245 | { |
Chuck Lever | dc59250 | 2005-08-18 11:24:12 -0700 | [diff] [blame] | 246 | if (!nfs_caches_unstable(inode)) { |
| 247 | spin_lock(&inode->i_lock); |
Chuck Lever | 5529680 | 2005-08-18 11:24:09 -0700 | [diff] [blame] | 248 | NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS; |
Chuck Lever | dc59250 | 2005-08-18 11:24:12 -0700 | [diff] [blame] | 249 | spin_unlock(&inode->i_lock); |
| 250 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 251 | } |
| 252 | |
| 253 | static inline int nfs_server_capable(struct inode *inode, int cap) |
| 254 | { |
| 255 | return NFS_SERVER(inode)->caps & cap; |
| 256 | } |
| 257 | |
| 258 | static inline int NFS_USE_READDIRPLUS(struct inode *inode) |
| 259 | { |
Chuck Lever | 412d582 | 2005-08-18 11:24:11 -0700 | [diff] [blame] | 260 | return test_bit(NFS_INO_ADVISE_RDPLUS, &NFS_FLAGS(inode)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 261 | } |
| 262 | |
| 263 | /** |
| 264 | * nfs_save_change_attribute - Returns the inode attribute change cookie |
| 265 | * @inode - pointer to inode |
| 266 | * The "change attribute" is updated every time we finish an operation |
| 267 | * that will result in a metadata change on the server. |
| 268 | */ |
| 269 | static inline long nfs_save_change_attribute(struct inode *inode) |
| 270 | { |
| 271 | return NFS_I(inode)->cache_change_attribute; |
| 272 | } |
| 273 | |
| 274 | /** |
| 275 | * nfs_verify_change_attribute - Detects NFS inode cache updates |
| 276 | * @inode - pointer to inode |
| 277 | * @chattr - previously saved change attribute |
| 278 | * Return "false" if metadata has been updated (or is in the process of |
| 279 | * being updated) since the change attribute was saved. |
| 280 | */ |
| 281 | static inline int nfs_verify_change_attribute(struct inode *inode, unsigned long chattr) |
| 282 | { |
| 283 | return !nfs_caches_unstable(inode) |
Trond Myklebust | 913a70f | 2005-10-27 22:12:38 -0400 | [diff] [blame] | 284 | && time_after_eq(chattr, NFS_I(inode)->cache_change_attribute); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 285 | } |
| 286 | |
| 287 | /* |
| 288 | * linux/fs/nfs/inode.c |
| 289 | */ |
| 290 | extern void nfs_zap_caches(struct inode *); |
| 291 | extern struct inode *nfs_fhget(struct super_block *, struct nfs_fh *, |
| 292 | struct nfs_fattr *); |
| 293 | extern int nfs_refresh_inode(struct inode *, struct nfs_fattr *); |
| 294 | extern int nfs_getattr(struct vfsmount *, struct dentry *, struct kstat *); |
| 295 | extern int nfs_permission(struct inode *, int, struct nameidata *); |
| 296 | extern int nfs_access_get_cached(struct inode *, struct rpc_cred *, struct nfs_access_entry *); |
| 297 | extern void nfs_access_add_cache(struct inode *, struct nfs_access_entry *); |
| 298 | extern int nfs_open(struct inode *, struct file *); |
| 299 | extern int nfs_release(struct inode *, struct file *); |
| 300 | extern int nfs_attribute_timeout(struct inode *inode); |
| 301 | extern int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode); |
| 302 | extern int __nfs_revalidate_inode(struct nfs_server *, struct inode *); |
Trond Myklebust | 7d52e86 | 2005-06-22 17:16:30 +0000 | [diff] [blame] | 303 | extern void nfs_revalidate_mapping(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 *alloc_nfs_open_context(struct dentry *dentry, struct rpc_cred *cred); |
| 311 | extern struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx); |
| 312 | extern void put_nfs_open_context(struct nfs_open_context *ctx); |
| 313 | extern void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx); |
| 314 | extern struct nfs_open_context *nfs_find_open_context(struct inode *inode, int mode); |
| 315 | extern void nfs_file_clear_open_context(struct file *filp); |
| 316 | |
| 317 | /* linux/net/ipv4/ipconfig.c: trims ip addr off front of name, too. */ |
| 318 | extern u32 root_nfs_parse_addr(char *name); /*__init*/ |
| 319 | |
Trond Myklebust | 0e574af | 2005-10-27 22:12:38 -0400 | [diff] [blame] | 320 | static inline void nfs_fattr_init(struct nfs_fattr *fattr) |
| 321 | { |
| 322 | fattr->valid = 0; |
Trond Myklebust | 3380114 | 2005-10-27 22:12:39 -0400 | [diff] [blame^] | 323 | fattr->time_start = jiffies; |
Trond Myklebust | 0e574af | 2005-10-27 22:12:38 -0400 | [diff] [blame] | 324 | } |
| 325 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 326 | /* |
| 327 | * linux/fs/nfs/file.c |
| 328 | */ |
| 329 | extern struct inode_operations nfs_file_inode_operations; |
Andreas Gruenbacher | b7fa055 | 2005-06-22 17:16:27 +0000 | [diff] [blame] | 330 | #ifdef CONFIG_NFS_V3 |
| 331 | extern struct inode_operations nfs3_file_inode_operations; |
| 332 | #endif /* CONFIG_NFS_V3 */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 333 | extern struct file_operations nfs_file_operations; |
| 334 | extern struct address_space_operations nfs_file_aops; |
| 335 | |
| 336 | static inline struct rpc_cred *nfs_file_cred(struct file *file) |
| 337 | { |
| 338 | if (file != NULL) { |
| 339 | struct nfs_open_context *ctx; |
| 340 | |
| 341 | ctx = (struct nfs_open_context*)file->private_data; |
| 342 | return ctx->cred; |
| 343 | } |
| 344 | return NULL; |
| 345 | } |
| 346 | |
| 347 | /* |
Andreas Gruenbacher | b7fa055 | 2005-06-22 17:16:27 +0000 | [diff] [blame] | 348 | * linux/fs/nfs/xattr.c |
| 349 | */ |
| 350 | #ifdef CONFIG_NFS_V3_ACL |
| 351 | extern ssize_t nfs3_listxattr(struct dentry *, char *, size_t); |
| 352 | extern ssize_t nfs3_getxattr(struct dentry *, const char *, void *, size_t); |
| 353 | extern int nfs3_setxattr(struct dentry *, const char *, |
| 354 | const void *, size_t, int); |
| 355 | extern int nfs3_removexattr (struct dentry *, const char *name); |
| 356 | #else |
| 357 | # define nfs3_listxattr NULL |
| 358 | # define nfs3_getxattr NULL |
| 359 | # define nfs3_setxattr NULL |
| 360 | # define nfs3_removexattr NULL |
| 361 | #endif |
| 362 | |
| 363 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 364 | * linux/fs/nfs/direct.c |
| 365 | */ |
| 366 | extern ssize_t nfs_direct_IO(int, struct kiocb *, const struct iovec *, loff_t, |
| 367 | unsigned long); |
| 368 | extern ssize_t nfs_file_direct_read(struct kiocb *iocb, char __user *buf, |
| 369 | size_t count, loff_t pos); |
| 370 | extern ssize_t nfs_file_direct_write(struct kiocb *iocb, const char __user *buf, |
| 371 | size_t count, loff_t pos); |
| 372 | |
| 373 | /* |
| 374 | * linux/fs/nfs/dir.c |
| 375 | */ |
| 376 | extern struct inode_operations nfs_dir_inode_operations; |
Andreas Gruenbacher | b7fa055 | 2005-06-22 17:16:27 +0000 | [diff] [blame] | 377 | #ifdef CONFIG_NFS_V3 |
| 378 | extern struct inode_operations nfs3_dir_inode_operations; |
| 379 | #endif /* CONFIG_NFS_V3 */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 380 | extern struct file_operations nfs_dir_operations; |
| 381 | extern struct dentry_operations nfs_dentry_operations; |
| 382 | |
| 383 | extern int nfs_instantiate(struct dentry *dentry, struct nfs_fh *fh, struct nfs_fattr *fattr); |
| 384 | |
| 385 | /* |
| 386 | * linux/fs/nfs/symlink.c |
| 387 | */ |
| 388 | extern struct inode_operations nfs_symlink_inode_operations; |
| 389 | |
| 390 | /* |
| 391 | * linux/fs/nfs/unlink.c |
| 392 | */ |
| 393 | extern int nfs_async_unlink(struct dentry *); |
| 394 | extern void nfs_complete_unlink(struct dentry *); |
| 395 | |
| 396 | /* |
| 397 | * linux/fs/nfs/write.c |
| 398 | */ |
| 399 | extern int nfs_writepage(struct page *page, struct writeback_control *wbc); |
| 400 | extern int nfs_writepages(struct address_space *, struct writeback_control *); |
| 401 | extern int nfs_flush_incompatible(struct file *file, struct page *page); |
| 402 | extern int nfs_updatepage(struct file *, struct page *, unsigned int, unsigned int); |
| 403 | extern void nfs_writeback_done(struct rpc_task *task); |
| 404 | |
| 405 | #if defined(CONFIG_NFS_V3) || defined(CONFIG_NFS_V4) |
| 406 | extern void nfs_commit_done(struct rpc_task *); |
| 407 | #endif |
| 408 | |
| 409 | /* |
| 410 | * Try to write back everything synchronously (but check the |
| 411 | * return value!) |
| 412 | */ |
| 413 | extern int nfs_sync_inode(struct inode *, unsigned long, unsigned int, int); |
| 414 | #if defined(CONFIG_NFS_V3) || defined(CONFIG_NFS_V4) |
Trond Myklebust | 3da28eb | 2005-06-22 17:16:31 +0000 | [diff] [blame] | 415 | extern int nfs_commit_inode(struct inode *, int); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 416 | #else |
| 417 | static inline int |
Trond Myklebust | 3da28eb | 2005-06-22 17:16:31 +0000 | [diff] [blame] | 418 | nfs_commit_inode(struct inode *inode, int how) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 419 | { |
| 420 | return 0; |
| 421 | } |
| 422 | #endif |
| 423 | |
| 424 | static inline int |
| 425 | nfs_have_writebacks(struct inode *inode) |
| 426 | { |
| 427 | return NFS_I(inode)->npages != 0; |
| 428 | } |
| 429 | |
| 430 | static inline int |
| 431 | nfs_wb_all(struct inode *inode) |
| 432 | { |
| 433 | int error = nfs_sync_inode(inode, 0, 0, FLUSH_WAIT); |
| 434 | return (error < 0) ? error : 0; |
| 435 | } |
| 436 | |
| 437 | /* |
| 438 | * Write back all requests on one page - we do this before reading it. |
| 439 | */ |
| 440 | static inline int nfs_wb_page_priority(struct inode *inode, struct page* page, int how) |
| 441 | { |
| 442 | int error = nfs_sync_inode(inode, page->index, 1, |
| 443 | how | FLUSH_WAIT | FLUSH_STABLE); |
| 444 | return (error < 0) ? error : 0; |
| 445 | } |
| 446 | |
| 447 | static inline int nfs_wb_page(struct inode *inode, struct page* page) |
| 448 | { |
| 449 | return nfs_wb_page_priority(inode, page, 0); |
| 450 | } |
| 451 | |
| 452 | /* |
| 453 | * Allocate and free nfs_write_data structures |
| 454 | */ |
| 455 | extern mempool_t *nfs_wdata_mempool; |
| 456 | |
| 457 | static inline struct nfs_write_data *nfs_writedata_alloc(void) |
| 458 | { |
| 459 | struct nfs_write_data *p = mempool_alloc(nfs_wdata_mempool, SLAB_NOFS); |
| 460 | if (p) { |
| 461 | memset(p, 0, sizeof(*p)); |
| 462 | INIT_LIST_HEAD(&p->pages); |
| 463 | } |
| 464 | return p; |
| 465 | } |
| 466 | |
| 467 | static inline void nfs_writedata_free(struct nfs_write_data *p) |
| 468 | { |
| 469 | mempool_free(p, nfs_wdata_mempool); |
| 470 | } |
| 471 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 472 | /* |
| 473 | * linux/fs/nfs/read.c |
| 474 | */ |
| 475 | extern int nfs_readpage(struct file *, struct page *); |
| 476 | extern int nfs_readpages(struct file *, struct address_space *, |
| 477 | struct list_head *, unsigned); |
| 478 | extern void nfs_readpage_result(struct rpc_task *); |
| 479 | |
| 480 | /* |
| 481 | * Allocate and free nfs_read_data structures |
| 482 | */ |
| 483 | extern mempool_t *nfs_rdata_mempool; |
| 484 | |
| 485 | static inline struct nfs_read_data *nfs_readdata_alloc(void) |
| 486 | { |
| 487 | struct nfs_read_data *p = mempool_alloc(nfs_rdata_mempool, SLAB_NOFS); |
| 488 | if (p) |
| 489 | memset(p, 0, sizeof(*p)); |
| 490 | return p; |
| 491 | } |
| 492 | |
| 493 | static inline void nfs_readdata_free(struct nfs_read_data *p) |
| 494 | { |
| 495 | mempool_free(p, nfs_rdata_mempool); |
| 496 | } |
| 497 | |
| 498 | extern void nfs_readdata_release(struct rpc_task *task); |
| 499 | |
| 500 | /* |
Andreas Gruenbacher | b7fa055 | 2005-06-22 17:16:27 +0000 | [diff] [blame] | 501 | * linux/fs/nfs3proc.c |
| 502 | */ |
| 503 | #ifdef CONFIG_NFS_V3_ACL |
| 504 | extern struct posix_acl *nfs3_proc_getacl(struct inode *inode, int type); |
| 505 | extern int nfs3_proc_setacl(struct inode *inode, int type, |
| 506 | struct posix_acl *acl); |
Andreas Gruenbacher | 055ffbe | 2005-06-22 17:16:27 +0000 | [diff] [blame] | 507 | extern int nfs3_proc_set_default_acl(struct inode *dir, struct inode *inode, |
| 508 | mode_t mode); |
Andreas Gruenbacher | 5c6a9f7 | 2005-06-22 17:16:27 +0000 | [diff] [blame] | 509 | extern void nfs3_forget_cached_acls(struct inode *inode); |
Andreas Gruenbacher | 055ffbe | 2005-06-22 17:16:27 +0000 | [diff] [blame] | 510 | #else |
| 511 | static inline int nfs3_proc_set_default_acl(struct inode *dir, |
| 512 | struct inode *inode, |
| 513 | mode_t mode) |
| 514 | { |
| 515 | return 0; |
| 516 | } |
Andreas Gruenbacher | 5c6a9f7 | 2005-06-22 17:16:27 +0000 | [diff] [blame] | 517 | |
| 518 | static inline void nfs3_forget_cached_acls(struct inode *inode) |
| 519 | { |
| 520 | } |
Andreas Gruenbacher | b7fa055 | 2005-06-22 17:16:27 +0000 | [diff] [blame] | 521 | #endif /* CONFIG_NFS_V3_ACL */ |
| 522 | |
| 523 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 524 | * linux/fs/mount_clnt.c |
| 525 | * (Used only by nfsroot module) |
| 526 | */ |
| 527 | extern int nfsroot_mount(struct sockaddr_in *, char *, struct nfs_fh *, |
| 528 | int, int); |
| 529 | |
| 530 | /* |
| 531 | * inline functions |
| 532 | */ |
| 533 | |
| 534 | static inline loff_t |
| 535 | nfs_size_to_loff_t(__u64 size) |
| 536 | { |
| 537 | loff_t maxsz = (((loff_t) ULONG_MAX) << PAGE_CACHE_SHIFT) + PAGE_CACHE_SIZE - 1; |
| 538 | if (size > maxsz) |
| 539 | return maxsz; |
| 540 | return (loff_t) size; |
| 541 | } |
| 542 | |
| 543 | static inline ino_t |
| 544 | nfs_fileid_to_ino_t(u64 fileid) |
| 545 | { |
| 546 | ino_t ino = (ino_t) fileid; |
| 547 | if (sizeof(ino_t) < sizeof(u64)) |
| 548 | ino ^= fileid >> (sizeof(u64)-sizeof(ino_t)) * 8; |
| 549 | return ino; |
| 550 | } |
| 551 | |
| 552 | /* NFS root */ |
| 553 | |
| 554 | extern void * nfs_root_data(void); |
| 555 | |
| 556 | #define nfs_wait_event(clnt, wq, condition) \ |
| 557 | ({ \ |
| 558 | int __retval = 0; \ |
| 559 | if (clnt->cl_intr) { \ |
| 560 | sigset_t oldmask; \ |
| 561 | rpc_clnt_sigmask(clnt, &oldmask); \ |
| 562 | __retval = wait_event_interruptible(wq, condition); \ |
| 563 | rpc_clnt_sigunmask(clnt, &oldmask); \ |
| 564 | } else \ |
| 565 | wait_event(wq, condition); \ |
| 566 | __retval; \ |
| 567 | }) |
| 568 | |
| 569 | #define NFS_JUKEBOX_RETRY_TIME (5 * HZ) |
| 570 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 571 | #endif /* __KERNEL__ */ |
| 572 | |
| 573 | /* |
| 574 | * NFS debug flags |
| 575 | */ |
| 576 | #define NFSDBG_VFS 0x0001 |
| 577 | #define NFSDBG_DIRCACHE 0x0002 |
| 578 | #define NFSDBG_LOOKUPCACHE 0x0004 |
| 579 | #define NFSDBG_PAGECACHE 0x0008 |
| 580 | #define NFSDBG_PROC 0x0010 |
| 581 | #define NFSDBG_XDR 0x0020 |
| 582 | #define NFSDBG_FILE 0x0040 |
| 583 | #define NFSDBG_ROOT 0x0080 |
| 584 | #define NFSDBG_CALLBACK 0x0100 |
| 585 | #define NFSDBG_ALL 0xFFFF |
| 586 | |
| 587 | #ifdef __KERNEL__ |
| 588 | # undef ifdebug |
| 589 | # ifdef NFS_DEBUG |
| 590 | # define ifdebug(fac) if (unlikely(nfs_debug & NFSDBG_##fac)) |
| 591 | # else |
| 592 | # define ifdebug(fac) if (0) |
| 593 | # endif |
| 594 | #endif /* __KERNEL */ |
| 595 | |
| 596 | #endif |