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Diffstat (limited to 'include/linux/nfs_fs.h')
| -rw-r--r-- | include/linux/nfs_fs.h | 767 |
1 files changed, 767 insertions, 0 deletions
diff --git a/include/linux/nfs_fs.h b/include/linux/nfs_fs.h new file mode 100644 index 000000000000..dbac7f363e5d --- /dev/null +++ b/include/linux/nfs_fs.h @@ -0,0 +1,767 @@ +/* + * 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/config.h> +#include <linux/in.h> +#include <linux/mm.h> +#include <linux/pagemap.h> +#include <linux/rwsem.h> +#include <linux/wait.h> +#include <linux/uio.h> + +#include <linux/nfs_fs_sb.h> + +#include <linux/sunrpc/debug.h> +#include <linux/sunrpc/auth.h> +#include <linux/sunrpc/clnt.h> + +#include <linux/nfs.h> +#include <linux/nfs2.h> +#include <linux/nfs3.h> +#include <linux/nfs4.h> +#include <linux/nfs_xdr.h> +#include <linux/rwsem.h> +#include <linux/workqueue.h> +#include <linux/mempool.h> + +/* + * Enable debugging support for nfs client. + * Requires RPC_DEBUG. + */ +#ifdef RPC_DEBUG +# define NFS_DEBUG +#endif + +#define NFS_MAX_FILE_IO_BUFFER_SIZE 32768 +#define NFS_DEF_FILE_IO_BUFFER_SIZE 4096 + +/* + * The upper limit on timeouts for the exponential backoff algorithm. + */ +#define NFS_WRITEBACK_DELAY (5*HZ) +#define NFS_WRITEBACK_LOCKDELAY (60*HZ) +#define NFS_COMMIT_DELAY (5*HZ) + +/* + * superblock magic number for NFS + */ +#define NFS_SUPER_MAGIC 0x6969 + +/* + * These are the default flags for swap requests + */ +#define NFS_RPC_SWAPFLAGS (RPC_TASK_SWAPPER|RPC_TASK_ROOTCREDS) + +#define NFS_RW_SYNC 0x0001 /* O_SYNC handling */ +#define NFS_RW_SWAP 0x0002 /* This is a swap request */ + +/* + * When flushing a cluster of dirty pages, there can be different + * strategies: + */ +#define FLUSH_AGING 0 /* only flush old buffers */ +#define FLUSH_SYNC 1 /* file being synced, or contention */ +#define FLUSH_WAIT 2 /* wait for completion */ +#define FLUSH_STABLE 4 /* commit to stable storage */ +#define FLUSH_LOWPRI 8 /* low priority background flush */ +#define FLUSH_HIGHPRI 16 /* high priority memory reclaim flush */ + +#ifdef __KERNEL__ + +/* + * NFSv3/v4 Access mode cache entry + */ +struct nfs_access_entry { + unsigned long jiffies; + struct rpc_cred * cred; + int mask; +}; + +struct nfs4_state; +struct nfs_open_context { + atomic_t count; + struct dentry *dentry; + struct rpc_cred *cred; + struct nfs4_state *state; + fl_owner_t lockowner; + int mode; + int error; + + struct list_head list; + wait_queue_head_t waitq; +}; + +/* + * NFSv4 delegation + */ +struct nfs_delegation; + +/* + * nfs fs inode data in memory + */ +struct nfs_inode { + /* + * The 64bit 'inode number' + */ + __u64 fileid; + + /* + * NFS file handle + */ + struct nfs_fh fh; + + /* + * Various flags + */ + unsigned int flags; + + /* + * read_cache_jiffies is when we started read-caching this inode, + * and read_cache_mtime is the mtime of the inode at that time. + * attrtimeo is for how long the cached information is assumed + * to be valid. A successful attribute revalidation doubles + * attrtimeo (up to acregmax/acdirmax), a failure resets it to + * acregmin/acdirmin. + * + * We need to revalidate the cached attrs for this inode if + * + * jiffies - read_cache_jiffies > attrtimeo + * + * and invalidate any cached data/flush out any dirty pages if + * we find that + * + * mtime != read_cache_mtime + */ + unsigned long readdir_timestamp; + unsigned long read_cache_jiffies; + unsigned long attrtimeo; + unsigned long attrtimeo_timestamp; + __u64 change_attr; /* v4 only */ + + /* "Generation counter" for the attribute cache. This is + * bumped whenever we update the metadata on the + * server. + */ + unsigned long cache_change_attribute; + /* + * Counter indicating the number of outstanding requests that + * will cause a file data update. + */ + atomic_t data_updates; + + struct nfs_access_entry cache_access; + + /* + * This is the cookie verifier used for NFSv3 readdir + * operations + */ + __u32 cookieverf[2]; + + /* + * This is the list of dirty unwritten pages. + */ + spinlock_t req_lock; + struct list_head dirty; + struct list_head commit; + struct radix_tree_root nfs_page_tree; + + unsigned int ndirty, + ncommit, + npages; + + /* Open contexts for shared mmap writes */ + struct list_head open_files; + + wait_queue_head_t nfs_i_wait; + +#ifdef CONFIG_NFS_V4 + /* NFSv4 state */ + struct list_head open_states; + struct nfs_delegation *delegation; + int delegation_state; + struct rw_semaphore rwsem; +#endif /* CONFIG_NFS_V4*/ + + struct inode vfs_inode; +}; + +/* + * Legal inode flag values + */ +#define NFS_INO_STALE 0x0001 /* possible stale inode */ +#define NFS_INO_ADVISE_RDPLUS 0x0002 /* advise readdirplus */ +#define NFS_INO_REVALIDATING 0x0004 /* revalidating attrs */ +#define NFS_INO_INVALID_ATTR 0x0008 /* cached attrs are invalid */ +#define NFS_INO_INVALID_DATA 0x0010 /* cached data is invalid */ +#define NFS_INO_INVALID_ATIME 0x0020 /* cached atime is invalid */ +#define NFS_INO_INVALID_ACCESS 0x0040 /* cached access cred invalid */ + +static inline struct nfs_inode *NFS_I(struct inode *inode) +{ + return container_of(inode, struct nfs_inode, vfs_inode); +} +#define NFS_SB(s) ((struct nfs_server *)(s->s_fs_info)) + +#define NFS_FH(inode) (&NFS_I(inode)->fh) +#define NFS_SERVER(inode) (NFS_SB(inode->i_sb)) +#define NFS_CLIENT(inode) (NFS_SERVER(inode)->client) +#define NFS_PROTO(inode) (NFS_SERVER(inode)->rpc_ops) +#define NFS_ADDR(inode) (RPC_PEERADDR(NFS_CLIENT(inode))) +#define NFS_COOKIEVERF(inode) (NFS_I(inode)->cookieverf) +#define NFS_READTIME(inode) (NFS_I(inode)->read_cache_jiffies) +#define NFS_CHANGE_ATTR(inode) (NFS_I(inode)->change_attr) +#define NFS_ATTRTIMEO(inode) (NFS_I(inode)->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_ATTRTIMEO_UPDATE(inode) (NFS_I(inode)->attrtimeo_timestamp) + +#define NFS_FLAGS(inode) (NFS_I(inode)->flags) +#define NFS_REVALIDATING(inode) (NFS_FLAGS(inode) & NFS_INO_REVALIDATING) +#define NFS_STALE(inode) (NFS_FLAGS(inode) & NFS_INO_STALE) + +#define NFS_FILEID(inode) (NFS_I(inode)->fileid) + +static inline int nfs_caches_unstable(struct inode *inode) +{ + return atomic_read(&NFS_I(inode)->data_updates) != 0; +} + +static inline void NFS_CACHEINV(struct inode *inode) +{ + if (!nfs_caches_unstable(inode)) + NFS_FLAGS(inode) |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS; +} + +static inline int nfs_server_capable(struct inode *inode, int cap) +{ + return NFS_SERVER(inode)->caps & cap; +} + +static inline int NFS_USE_READDIRPLUS(struct inode *inode) +{ + return NFS_FLAGS(inode) & NFS_INO_ADVISE_RDPLUS; +} + +/** + * nfs_save_change_attribute - Returns the inode attribute change cookie + * @inode - pointer to inode + * The "change attribute" is updated every time we finish an operation + * that will result in a metadata change on the server. + */ +static inline long nfs_save_change_attribute(struct inode *inode) +{ + return NFS_I(inode)->cache_change_attribute; +} + +/** + * nfs_verify_change_attribute - Detects NFS inode cache updates + * @inode - pointer to inode + * @chattr - previously saved change attribute + * Return "false" if metadata has been updated (or is in the process of + * being updated) since the change attribute was saved. + */ +static inline int nfs_verify_change_attribute(struct inode *inode, unsigned long chattr) +{ + return !nfs_caches_unstable(inode) + && chattr == NFS_I(inode)->cache_change_attribute; +} + +/* + * linux/fs/nfs/inode.c + */ +extern void nfs_zap_caches(struct inode *); +extern struct inode *nfs_fhget(struct super_block *, struct nfs_fh *, + struct nfs_fattr *); +extern int nfs_refresh_inode(struct inode *, struct nfs_fattr *); +extern int nfs_getattr(struct vfsmount *, struct dentry *, struct kstat *); +extern int nfs_permission(struct inode *, int, struct nameidata *); +extern int nfs_access_get_cached(struct inode *, struct rpc_cred *, struct nfs_access_entry *); +extern void nfs_access_add_cache(struct inode *, struct nfs_access_entry *); +extern int nfs_open(struct inode *, struct file *); +extern int nfs_release(struct inode *, struct file *); +extern int nfs_attribute_timeout(struct inode *inode); +extern int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode); +extern int __nfs_revalidate_inode(struct nfs_server *, struct inode *); +extern int nfs_setattr(struct dentry *, struct iattr *); +extern void nfs_begin_attr_update(struct inode *); +extern void nfs_end_attr_update(struct inode *); +extern void nfs_begin_data_update(struct inode *); +extern void nfs_end_data_update(struct inode *); +extern void nfs_end_data_update_defer(struct inode *); +extern struct nfs_open_context *alloc_nfs_open_context(struct dentry *dentry, struct rpc_cred *cred); +extern struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx); +extern void put_nfs_open_context(struct nfs_open_context *ctx); +extern void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx); +extern struct nfs_open_context *nfs_find_open_context(struct inode *inode, int mode); +extern void nfs_file_clear_open_context(struct file *filp); + +/* linux/net/ipv4/ipconfig.c: trims ip addr off front of name, too. */ +extern u32 root_nfs_parse_addr(char *name); /*__init*/ + +/* + * linux/fs/nfs/file.c + */ +extern struct inode_operations nfs_file_inode_operations; +extern struct file_operations nfs_file_operations; +extern struct address_space_operations nfs_file_aops; + +static inline struct rpc_cred *nfs_file_cred(struct file *file) +{ + if (file != NULL) { + struct nfs_open_context *ctx; + + ctx = (struct nfs_open_context*)file->private_data; + return ctx->cred; + } + return NULL; +} + +/* + * linux/fs/nfs/direct.c + */ +extern ssize_t nfs_direct_IO(int, struct kiocb *, const struct iovec *, loff_t, + unsigned long); +extern ssize_t nfs_file_direct_read(struct kiocb *iocb, char __user *buf, + size_t count, loff_t pos); +extern ssize_t nfs_file_direct_write(struct kiocb *iocb, const char __user *buf, + size_t count, loff_t pos); + +/* + * linux/fs/nfs/dir.c + */ +extern struct inode_operations nfs_dir_inode_operations; +extern struct file_operations nfs_dir_operations; +extern struct dentry_operations nfs_dentry_operations; + +extern int nfs_instantiate(struct dentry *dentry, struct nfs_fh *fh, struct nfs_fattr *fattr); + +/* + * linux/fs/nfs/symlink.c + */ +extern struct inode_operations nfs_symlink_inode_operations; + +/* + * linux/fs/nfs/unlink.c + */ +extern int nfs_async_unlink(struct dentry *); +extern void nfs_complete_unlink(struct dentry *); + +/* + * linux/fs/nfs/write.c + */ +extern int nfs_writepage(struct page *page, struct writeback_control *wbc); +extern int nfs_writepages(struct address_space *, struct writeback_control *); +extern int nfs_flush_incompatible(struct file *file, struct page *page); +extern int nfs_updatepage(struct file *, struct page *, unsigned int, unsigned int); +extern void nfs_writeback_done(struct rpc_task *task); + +#if defined(CONFIG_NFS_V3) || defined(CONFIG_NFS_V4) +extern void nfs_commit_done(struct rpc_task *); +#endif + +/* + * Try to write back everything synchronously (but check the + * return value!) + */ +extern int nfs_sync_inode(struct inode *, unsigned long, unsigned int, int); +#if defined(CONFIG_NFS_V3) || defined(CONFIG_NFS_V4) +extern int nfs_commit_inode(struct inode *, unsigned long, unsigned int, int); +#else +static inline int +nfs_commit_inode(struct inode *inode, unsigned long idx_start, unsigned int npages, int how) +{ + return 0; +} +#endif + +static inline int +nfs_have_writebacks(struct inode *inode) +{ + return NFS_I(inode)->npages != 0; +} + +static inline int +nfs_wb_all(struct inode *inode) +{ + int error = nfs_sync_inode(inode, 0, 0, FLUSH_WAIT); + return (error < 0) ? error : 0; +} + +/* + * Write back all requests on one page - we do this before reading it. + */ +static inline int nfs_wb_page_priority(struct inode *inode, struct page* page, int how) +{ + int error = nfs_sync_inode(inode, page->index, 1, + how | FLUSH_WAIT | FLUSH_STABLE); + return (error < 0) ? error : 0; +} + +static inline int nfs_wb_page(struct inode *inode, struct page* page) +{ + return nfs_wb_page_priority(inode, page, 0); +} + +/* + * Allocate and free nfs_write_data structures + */ +extern mempool_t *nfs_wdata_mempool; + +static inline struct nfs_write_data *nfs_writedata_alloc(void) +{ + struct nfs_write_data *p = mempool_alloc(nfs_wdata_mempool, SLAB_NOFS); + if (p) { + memset(p, 0, sizeof(*p)); + INIT_LIST_HEAD(&p->pages); + } + return p; +} + +static inline void nfs_writedata_free(struct nfs_write_data *p) +{ + mempool_free(p, nfs_wdata_mempool); +} + +/* Hack for future NFS swap support */ +#ifndef IS_SWAPFILE +# define IS_SWAPFILE(inode) (0) +#endif + +/* + * linux/fs/nfs/read.c + */ +extern int nfs_readpage(struct file *, struct page *); +extern int nfs_readpages(struct file *, struct address_space *, + struct list_head *, unsigned); +extern void nfs_readpage_result(struct rpc_task *); + +/* + * Allocate and free nfs_read_data structures + */ +extern mempool_t *nfs_rdata_mempool; + +static inline struct nfs_read_data *nfs_readdata_alloc(void) +{ + struct nfs_read_data *p = mempool_alloc(nfs_rdata_mempool, SLAB_NOFS); + if (p) + memset(p, 0, sizeof(*p)); + return p; +} + +static inline void nfs_readdata_free(struct nfs_read_data *p) +{ + mempool_free(p, nfs_rdata_mempool); +} + +extern void nfs_readdata_release(struct rpc_task *task); + +/* + * linux/fs/mount_clnt.c + * (Used only by nfsroot module) + */ +extern int nfsroot_mount(struct sockaddr_in *, char *, struct nfs_fh *, + int, int); + +/* + * inline functions + */ + +static inline loff_t +nfs_size_to_loff_t(__u64 size) +{ + loff_t maxsz = (((loff_t) ULONG_MAX) << PAGE_CACHE_SHIFT) + PAGE_CACHE_SIZE - 1; + if (size > maxsz) + return maxsz; + return (loff_t) size; +} + +static inline ino_t +nfs_fileid_to_ino_t(u64 fileid) +{ + ino_t ino = (ino_t) fileid; + if (sizeof(ino_t) < sizeof(u64)) + ino ^= fileid >> (sizeof(u64)-sizeof(ino_t)) * 8; + return ino; +} + +/* NFS root */ + +extern void * nfs_root_data(void); + +#define nfs_wait_event(clnt, wq, condition) \ +({ \ + int __retval = 0; \ + if (clnt->cl_intr) { \ + sigset_t oldmask; \ + rpc_clnt_sigmask(clnt, &oldmask); \ + __retval = wait_event_interruptible(wq, condition); \ + rpc_clnt_sigunmask(clnt, &oldmask); \ + } else \ + wait_event(wq, condition); \ + __retval; \ +}) + +#define NFS_JUKEBOX_RETRY_TIME (5 * HZ) + +#ifdef CONFIG_NFS_V4 + +struct idmap; + +/* + * In a seqid-mutating op, this macro controls which error return + * values trigger incrementation of the seqid. + * + * from rfc 3010: + * The client MUST monotonically increment the sequence number for the + * CLOSE, LOCK, LOCKU, OPEN, OPEN_CONFIRM, and OPEN_DOWNGRADE + * operations. This is true even in the event that the previous + * operation that used the sequence number received an error. The only + * exception to this rule is if the previous operation received one of + * the following errors: NFSERR_STALE_CLIENTID, NFSERR_STALE_STATEID, + * NFSERR_BAD_STATEID, NFSERR_BAD_SEQID, NFSERR_BADXDR, + * NFSERR_RESOURCE, NFSERR_NOFILEHANDLE. + * + */ +#define seqid_mutating_err(err) \ +(((err) != NFSERR_STALE_CLIENTID) && \ + ((err) != NFSERR_STALE_STATEID) && \ + ((err) != NFSERR_BAD_STATEID) && \ + ((err) != NFSERR_BAD_SEQID) && \ + ((err) != NFSERR_BAD_XDR) && \ + ((err) != NFSERR_RESOURCE) && \ + ((err) != NFSERR_NOFILEHANDLE)) + +enum nfs4_client_state { + NFS4CLNT_OK = 0, +}; + +/* + * The nfs4_client identifies our client state to the server. + */ +struct nfs4_client { + struct list_head cl_servers; /* Global list of servers */ + struct in_addr cl_addr; /* Server identifier */ + u64 cl_clientid; /* constant */ + nfs4_verifier cl_confirm; + unsigned long cl_state; + + u32 cl_lockowner_id; + + /* + * The following rwsem ensures exclusive access to the server + * while we recover the state following a lease expiration. + */ + struct rw_semaphore cl_sem; + + struct list_head cl_delegations; + struct list_head cl_state_owners; + struct list_head cl_unused; + int cl_nunused; + spinlock_t cl_lock; + atomic_t cl_count; + + struct rpc_clnt * cl_rpcclient; + struct rpc_cred * cl_cred; + + struct list_head cl_superblocks; /* List of nfs_server structs */ + + unsigned long cl_lease_time; + unsigned long cl_last_renewal; + struct work_struct cl_renewd; + struct work_struct cl_recoverd; + + wait_queue_head_t cl_waitq; + struct rpc_wait_queue cl_rpcwaitq; + + /* used for the setclientid verifier */ + struct timespec cl_boot_time; + + /* idmapper */ + struct idmap * cl_idmap; + + /* Our own IP address, as a null-terminated string. + * This is used to generate the clientid, and the callback address. + */ + char cl_ipaddr[16]; + unsigned char cl_id_uniquifier; +}; + +/* + * NFS4 state_owners and lock_owners are simply labels for ordered + * sequences of RPC calls. Their sole purpose is to provide once-only + * semantics by allowing the server to identify replayed requests. + * + * The ->so_sema is held during all state_owner seqid-mutating operations: + * OPEN, OPEN_DOWNGRADE, and CLOSE. Its purpose is to properly serialize + * so_seqid. + */ +struct nfs4_state_owner { + struct list_head so_list; /* per-clientid list of state_owners */ + struct nfs4_client *so_client; + u32 so_id; /* 32-bit identifier, unique */ + struct semaphore so_sema; + u32 so_seqid; /* protected by so_sema */ + atomic_t so_count; + + struct rpc_cred *so_cred; /* Associated cred */ + struct list_head so_states; + struct list_head so_delegations; +}; + +/* + * struct nfs4_state maintains the client-side state for a given + * (state_owner,inode) tuple (OPEN) or state_owner (LOCK). + * + * OPEN: + * In order to know when to OPEN_DOWNGRADE or CLOSE the state on the server, + * we need to know how many files are open for reading or writing on a + * given inode. This information too is stored here. + * + * LOCK: one nfs4_state (LOCK) to hold the lock stateid nfs4_state(OPEN) + */ + +struct nfs4_lock_state { + struct list_head ls_locks; /* Other lock stateids */ + fl_owner_t ls_owner; /* POSIX lock owner */ +#define NFS_LOCK_INITIALIZED 1 + int ls_flags; + u32 ls_seqid; + u32 ls_id; + nfs4_stateid ls_stateid; + atomic_t ls_count; +}; + +/* bits for nfs4_state->flags */ +enum { + LK_STATE_IN_USE, + NFS_DELEGATED_STATE, +}; + +struct nfs4_state { + struct list_head open_states; /* List of states for the same state_owner */ + struct list_head inode_states; /* List of states for the same inode */ + struct list_head lock_states; /* List of subservient lock stateids */ + + struct nfs4_state_owner *owner; /* Pointer to the open owner */ + struct inode *inode; /* Pointer to the inode */ + + unsigned long flags; /* Do we hold any locks? */ + struct semaphore lock_sema; /* Serializes file locking operations */ + rwlock_t state_lock; /* Protects the lock_states list */ + + nfs4_stateid stateid; + + unsigned int nreaders; + unsigned int nwriters; + int state; /* State on the server (R,W, or RW) */ + atomic_t count; +}; + + +struct nfs4_exception { + long timeout; + int retry; +}; + +struct nfs4_state_recovery_ops { + int (*recover_open)(struct nfs4_state_owner *, struct nfs4_state *); + int (*recover_lock)(struct nfs4_state *, struct file_lock *); +}; + +extern struct dentry_operations nfs4_dentry_operations; +extern struct inode_operations nfs4_dir_inode_operations; + +/* nfs4proc.c */ +extern int nfs4_map_errors(int err); +extern int nfs4_proc_setclientid(struct nfs4_client *, u32, unsigned short); +extern int nfs4_proc_setclientid_confirm(struct nfs4_client *); +extern int nfs4_proc_async_renew(struct nfs4_client *); +extern int nfs4_proc_renew(struct nfs4_client *); +extern int nfs4_do_close(struct inode *inode, struct nfs4_state *state, mode_t mode); +extern struct inode *nfs4_atomic_open(struct inode *, struct dentry *, struct nameidata *); +extern int nfs4_open_revalidate(struct inode *, struct dentry *, int); + +extern struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops; +extern struct nfs4_state_recovery_ops nfs4_network_partition_recovery_ops; + +/* nfs4renewd.c */ +extern void nfs4_schedule_state_renewal(struct nfs4_client *); +extern void nfs4_renewd_prepare_shutdown(struct nfs_server *); +extern void nfs4_kill_renewd(struct nfs4_client *); + +/* nfs4state.c */ +extern void init_nfsv4_state(struct nfs_server *); +extern void destroy_nfsv4_state(struct nfs_server *); +extern struct nfs4_client *nfs4_get_client(struct in_addr *); +extern void nfs4_put_client(struct nfs4_client *clp); +extern int nfs4_init_client(struct nfs4_client *clp); +extern struct nfs4_client *nfs4_find_client(struct in_addr *); +extern u32 nfs4_alloc_lockowner_id(struct nfs4_client *); + +extern struct nfs4_state_owner * nfs4_get_state_owner(struct nfs_server *, struct rpc_cred *); +extern void nfs4_put_state_owner(struct nfs4_state_owner *); +extern void nfs4_drop_state_owner(struct nfs4_state_owner *); +extern struct nfs4_state * nfs4_get_open_state(struct inode *, struct nfs4_state_owner *); +extern void nfs4_put_open_state(struct nfs4_state *); +extern void nfs4_close_state(struct nfs4_state *, mode_t); +extern struct nfs4_state *nfs4_find_state(struct inode *, struct rpc_cred *, mode_t mode); +extern void nfs4_increment_seqid(int status, struct nfs4_state_owner *sp); +extern void nfs4_schedule_state_recovery(struct nfs4_client *); +extern struct nfs4_lock_state *nfs4_find_lock_state(struct nfs4_state *state, fl_owner_t); +extern struct nfs4_lock_state *nfs4_get_lock_state(struct nfs4_state *state, fl_owner_t); +extern void nfs4_put_lock_state(struct nfs4_lock_state *state); +extern void nfs4_increment_lock_seqid(int status, struct nfs4_lock_state *ls); +extern void nfs4_notify_setlk(struct nfs4_state *, struct file_lock *, struct nfs4_lock_state *); +extern void nfs4_notify_unlck(struct nfs4_state *, struct file_lock *, struct nfs4_lock_state *); +extern void nfs4_copy_stateid(nfs4_stateid *, struct nfs4_state *, fl_owner_t); + + + +struct nfs4_mount_data; +#else +#define init_nfsv4_state(server) do { } while (0) +#define destroy_nfsv4_state(server) do { } while (0) +#define nfs4_put_state_owner(inode, owner) do { } while (0) +#define nfs4_put_open_state(state) do { } while (0) +#define nfs4_close_state(a, b) do { } while (0) +#define nfs4_renewd_prepare_shutdown(server) do { } while (0) +#endif + +#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_CALLBACK 0x0100 +#define NFSDBG_ALL 0xFFFF + +#ifdef __KERNEL__ +# undef ifdebug +# ifdef NFS_DEBUG +# define ifdebug(fac) if (unlikely(nfs_debug & NFSDBG_##fac)) +# else +# define ifdebug(fac) if (0) +# endif +#endif /* __KERNEL */ + +#endif |