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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 | /* * linux/include/linux/nfs_fs.h * * Copyright (C) 1992 Rick Sladkey * * OS-specific nfs filesystem definitions and declarations */ #ifndef _LINUX_NFS_FS_H #define _LINUX_NFS_FS_H #include <linux/signal.h> #include <linux/sched.h> #include <linux/in.h> #include <linux/sunrpc/sched.h> #include <linux/nfs.h> #include <linux/nfs_mount.h> /* * Enable debugging support for nfs client. * Requires RPC_DEBUG. */ #ifdef RPC_DEBUG # define NFS_DEBUG #endif /* * NFS_MAX_DIRCACHE controls the number of simultaneously cached * directory chunks. Each chunk holds the list of nfs_entry's returned * in a single readdir call in a memory region of size PAGE_SIZE. * * Note that at most server->rsize bytes of the cache memory are used. */ #define NFS_MAX_DIRCACHE 16 #define NFS_MAX_FILE_IO_BUFFER_SIZE 16384 #define NFS_DEF_FILE_IO_BUFFER_SIZE 4096 /* * The upper limit on timeouts for the exponential backoff algorithm. */ #define NFS_MAX_RPC_TIMEOUT (6*HZ) /* * Size of the lookup cache in units of number of entries cached. * It is better not to make this too large although the optimum * depends on a usage and environment. */ #define NFS_LOOKUP_CACHE_SIZE 64 /* * superblock magic number for NFS */ #define NFS_SUPER_MAGIC 0x6969 #define NFS_FH(dentry) ((struct nfs_fh *) ((dentry)->d_fsdata)) #define NFS_DSERVER(dentry) (&(dentry)->d_sb->u.nfs_sb.s_server) #define NFS_SERVER(inode) (&(inode)->i_sb->u.nfs_sb.s_server) #define NFS_CLIENT(inode) (NFS_SERVER(inode)->client) #define NFS_ADDR(inode) (RPC_PEERADDR(NFS_CLIENT(inode))) #define NFS_CONGESTED(inode) (RPC_CONGESTED(NFS_CLIENT(inode))) #define NFS_READTIME(inode) ((inode)->u.nfs_i.read_cache_jiffies) #define NFS_OLDMTIME(inode) ((inode)->u.nfs_i.read_cache_mtime) #define NFS_CACHEINV(inode) \ do { \ NFS_READTIME(inode) = jiffies - 1000000; \ NFS_OLDMTIME(inode) = 0; \ } while (0) #define NFS_ATTRTIMEO(inode) ((inode)->u.nfs_i.attrtimeo) #define NFS_MINATTRTIMEO(inode) \ (S_ISDIR(inode->i_mode)? NFS_SERVER(inode)->acdirmin \ : NFS_SERVER(inode)->acregmin) #define NFS_MAXATTRTIMEO(inode) \ (S_ISDIR(inode->i_mode)? NFS_SERVER(inode)->acdirmax \ : NFS_SERVER(inode)->acregmax) #define NFS_FLAGS(inode) ((inode)->u.nfs_i.flags) #define NFS_REVALIDATING(inode) (NFS_FLAGS(inode) & NFS_INO_REVALIDATE) #define NFS_WRITEBACK(inode) ((inode)->u.nfs_i.writeback) /* * These are the default flags for swap requests */ #define NFS_RPC_SWAPFLAGS (RPC_TASK_SWAPPER|RPC_TASK_ROOTCREDS) /* Flags in the RPC client structure */ #define NFS_CLNTF_BUFSIZE 0x0001 /* readdir buffer in longwords */ #ifdef __KERNEL__ /* * This struct describes a file region to be written. * It's kind of a pity we have to keep all these lists ourselves, rather * than sticking an extra pointer into struct page. */ struct nfs_wreq { struct rpc_listitem wb_list; /* linked list of req's */ struct rpc_task wb_task; /* RPC task */ struct file * wb_file; /* dentry referenced */ struct page * wb_page; /* page to be written */ struct wait_queue * wb_wait; /* wait for completion */ unsigned int wb_offset; /* offset within page */ unsigned int wb_bytes; /* dirty range */ unsigned int wb_count; /* user count */ int wb_status; pid_t wb_pid; /* owner process */ unsigned short wb_flags; /* status flags */ struct nfs_writeargs wb_args; /* NFS RPC stuff */ struct nfs_fattr wb_fattr; /* file attributes */ }; #define WB_NEXT(req) ((struct nfs_wreq *) ((req)->wb_list.next)) /* * Various flags for wb_flags */ #define NFS_WRITE_CANCELLED 0x0004 /* has been cancelled */ #define NFS_WRITE_UNCOMMITTED 0x0008 /* written but uncommitted (NFSv3) */ #define NFS_WRITE_INVALIDATE 0x0010 /* invalidate after write */ #define NFS_WRITE_INPROGRESS 0x0100 /* RPC call in progress */ #define NFS_WRITE_COMPLETE 0x0200 /* RPC call completed */ #define WB_CANCELLED(req) ((req)->wb_flags & NFS_WRITE_CANCELLED) #define WB_UNCOMMITTED(req) ((req)->wb_flags & NFS_WRITE_UNCOMMITTED) #define WB_INVALIDATE(req) ((req)->wb_flags & NFS_WRITE_INVALIDATE) #define WB_INPROGRESS(req) ((req)->wb_flags & NFS_WRITE_INPROGRESS) #define WB_COMPLETE(req) ((req)->wb_flags & NFS_WRITE_COMPLETE) /* * linux/fs/nfs/proc.c */ extern int nfs_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr); extern int nfs_proc_setattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_sattr *sattr, struct nfs_fattr *fattr); extern int nfs_proc_lookup(struct nfs_server *server, struct nfs_fh *dir, const char *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr); extern int nfs_proc_readlink(struct nfs_server *server, struct nfs_fh *fhandle, void **p0, char **string, unsigned int *len, unsigned int maxlen); extern int nfs_proc_read(struct nfs_server *server, struct nfs_fh *fhandle, int swap, unsigned long offset, unsigned int count, void *buffer, struct nfs_fattr *fattr); extern int nfs_proc_write(struct nfs_server *server, struct nfs_fh *fhandle, int swap, unsigned long offset, unsigned int count, const void *buffer, struct nfs_fattr *fattr); extern int nfs_proc_create(struct nfs_server *server, struct nfs_fh *dir, const char *name, struct nfs_sattr *sattr, struct nfs_fh *fhandle, struct nfs_fattr *fattr); extern int nfs_proc_remove(struct nfs_server *server, struct nfs_fh *dir, const char *name); extern int nfs_proc_rename(struct nfs_server *server, struct nfs_fh *old_dir, const char *old_name, struct nfs_fh *new_dir, const char *new_name); extern int nfs_proc_link(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fh *dir, const char *name); extern int nfs_proc_symlink(struct nfs_server *server, struct nfs_fh *dir, const char *name, const char *path, struct nfs_sattr *sattr); extern int nfs_proc_mkdir(struct nfs_server *server, struct nfs_fh *dir, const char *name, struct nfs_sattr *sattr, struct nfs_fh *fhandle, struct nfs_fattr *fattr); extern int nfs_proc_rmdir(struct nfs_server *server, struct nfs_fh *dir, const char *name); extern int nfs_proc_readdir(struct nfs_server *server, struct nfs_fh *fhandle, u32 cookie, unsigned int size, __u32 *entry); extern int nfs_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *res); /* * linux/fs/nfs/inode.c */ extern struct super_block *nfs_read_super(struct super_block *, void *, int); extern int init_nfs_fs(void); extern struct inode *nfs_fhget(struct dentry *, struct nfs_fh *, struct nfs_fattr *); extern int nfs_refresh_inode(struct inode *, struct nfs_fattr *); extern int nfs_revalidate(struct dentry *); extern int nfs_open(struct inode *, struct file *); extern int nfs_release(struct inode *, struct file *); extern int _nfs_revalidate_inode(struct nfs_server *, struct dentry *); /* * linux/fs/nfs/file.c */ extern struct inode_operations nfs_file_inode_operations; /* * linux/fs/nfs/dir.c */ extern struct inode_operations nfs_dir_inode_operations; extern struct dentry_operations nfs_dentry_operations; extern void nfs_free_dircache(void); extern void nfs_invalidate_dircache(struct inode *); extern void nfs_invalidate_dircache_sb(struct super_block *); /* * linux/fs/nfs/symlink.c */ extern struct inode_operations nfs_symlink_inode_operations; /* * linux/fs/nfs/locks.c */ extern int nfs_lock(struct file *, int, struct file_lock *); /* * linux/fs/nfs/write.c */ extern int nfs_writepage(struct file *, struct page *); extern int nfs_check_failed_request(struct inode *); /* * Try to write back everything synchronously (but check the * return value!) */ extern int nfs_wb_all(struct inode *); extern int nfs_wb_page(struct inode *, struct page *); extern int nfs_wb_file(struct inode *, struct file *); /* * Invalidate write-backs, possibly trying to write them * back first.. */ extern void nfs_inval(struct inode *); extern int nfs_updatepage(struct file *, struct page *, unsigned long, unsigned int, int); /* * linux/fs/nfs/read.c */ extern int nfs_readpage(struct file *, struct page *); /* * linux/fs/mount_clnt.c * (Used only by nfsroot module) */ extern int nfs_mount(struct sockaddr_in *, char *, struct nfs_fh *); /* * inline functions */ static inline int nfs_revalidate_inode(struct nfs_server *server, struct dentry *dentry) { struct inode *inode = dentry->d_inode; if (jiffies - NFS_READTIME(inode) < NFS_ATTRTIMEO(inode)) return 0; return _nfs_revalidate_inode(server, dentry); } /* NFS root */ extern int nfs_root_mount(struct super_block *sb); #endif /* __KERNEL__ */ /* * NFS debug flags */ #define NFSDBG_VFS 0x0001 #define NFSDBG_DIRCACHE 0x0002 #define NFSDBG_LOOKUPCACHE 0x0004 #define NFSDBG_PAGECACHE 0x0008 #define NFSDBG_PROC 0x0010 #define NFSDBG_XDR 0x0020 #define NFSDBG_FILE 0x0040 #define NFSDBG_ROOT 0x0080 #define NFSDBG_ALL 0xFFFF #ifdef __KERNEL__ # undef ifdebug # ifdef NFS_DEBUG # define ifdebug(fac) if (nfs_debug & NFSDBG_##fac) # else # define ifdebug(fac) if (0) # endif #endif /* __KERNEL */ #endif |