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- /*
- * 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_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
-