X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=include%2Flinux%2Fnfs_fs.h;h=c5d4084773e8bf321ddba31e1370bfe0ae7cce64;hb=97bf2856c6014879bd04983a3e9dfcdac1e7fe85;hp=0fd3f817831eafeff81c07b6b2e182c2b7d612b7;hpb=9213980e6a70d8473e0ffd4b39ab5b6caaba9ff5;p=linux-2.6.git diff --git a/include/linux/nfs_fs.h b/include/linux/nfs_fs.h index 0fd3f8178..c5d408477 100644 --- a/include/linux/nfs_fs.h +++ b/include/linux/nfs_fs.h @@ -9,15 +9,40 @@ #ifndef _LINUX_NFS_FS_H #define _LINUX_NFS_FS_H -#include +#include + +/* + * Enable debugging support for nfs client. + * Requires RPC_DEBUG. + */ +#ifdef RPC_DEBUG +# define NFS_DEBUG +#endif + +/* Default timeout values */ +#define NFS_MAX_UDP_TIMEOUT (60*HZ) +#define NFS_MAX_TCP_TIMEOUT (600*HZ) + +/* + * When flushing a cluster of dirty pages, there can be different + * strategies: + */ +#define FLUSH_SYNC 1 /* file being synced, or contention */ +#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 */ +#define FLUSH_NOCOMMIT 32 /* Don't send the NFSv3/v4 COMMIT */ +#define FLUSH_INVALIDATE 64 /* Invalidate the page cache */ +#define FLUSH_NOWRITEPAGE 128 /* Don't call writepage() */ + +#ifdef __KERNEL__ + #include #include #include +#include #include #include -#include - -#include #include #include @@ -28,62 +53,51 @@ #include #include #include -#include -/* - * 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) +#include -/* - * superblock magic number for NFS - */ -#define NFS_SUPER_MAGIC 0x6969 +#include +#include /* * 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 Access mode cache + * NFSv3/v4 Access mode cache entry */ -struct nfs_access_cache { +struct nfs_access_entry { + struct rb_node rb_node; + struct list_head lru; unsigned long jiffies; struct rpc_cred * cred; int mask; - int err; +}; + +struct nfs4_state; +struct nfs_open_context { + atomic_t count; + struct vfsmount *vfsmnt; + struct dentry *dentry; + struct rpc_cred *cred; + struct nfs4_state *state; + fl_owner_t lockowner; + int mode; + int error; + + struct list_head list; + + __u64 dir_cookie; }; +/* + * NFSv4 delegation + */ +struct nfs_delegation; + +struct posix_acl; + /* * nfs fs inode data in memory */ @@ -101,11 +115,11 @@ struct nfs_inode { /* * Various flags */ - unsigned int flags; + unsigned long flags; /* atomic bit ops */ + unsigned long cache_validity; /* bit mask */ /* - * read_cache_jiffies is when we started read-caching this inode, - * and read_cache_mtime is the mtime of the inode at that time. + * read_cache_jiffies is when we started read-caching this inode. * 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 @@ -114,18 +128,13 @@ struct nfs_inode { * 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 */ + unsigned long last_updated; /* "Generation counter" for the attribute cache. This is * bumped whenever we update the metadata on the * server. @@ -137,17 +146,24 @@ struct nfs_inode { */ atomic_t data_updates; - struct nfs_access_cache cache_access; + struct rb_root access_cache; + struct list_head access_cache_entry_lru; + struct list_head access_cache_inode_lru; +#ifdef CONFIG_NFS_V3_ACL + struct posix_acl *acl_access; + struct posix_acl *acl_default; +#endif /* * This is the cookie verifier used for NFSv3 readdir * operations */ - __u32 cookieverf[2]; + __be32 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; @@ -156,28 +172,37 @@ struct nfs_inode { ncommit, npages; - /* Credentials for shared mmap */ - struct rpc_cred *mm_cred; - - wait_queue_head_t nfs_i_wait; + /* Open contexts for shared mmap writes */ + struct list_head open_files; #ifdef CONFIG_NFS_V4 + struct nfs4_cached_acl *nfs4_acl; /* 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 + * Cache validity bit flags */ -#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_ATTR 0x0001 /* cached attrs are invalid */ +#define NFS_INO_INVALID_DATA 0x0002 /* cached data is invalid */ +#define NFS_INO_INVALID_ATIME 0x0004 /* cached atime is invalid */ +#define NFS_INO_INVALID_ACCESS 0x0008 /* cached access cred invalid */ +#define NFS_INO_INVALID_ACL 0x0010 /* cached acls are invalid */ +#define NFS_INO_REVAL_PAGECACHE 0x0020 /* must revalidate pagecache */ + +/* + * Bit offsets in flags field + */ +#define NFS_INO_REVALIDATING (0) /* revalidating attrs */ +#define NFS_INO_ADVISE_RDPLUS (1) /* advise readdirplus */ +#define NFS_INO_STALE (2) /* possible stale inode */ +#define NFS_INO_ACL_LRU_SET (3) /* Inode is on the LRU list */ static inline struct nfs_inode *NFS_I(struct inode *inode) { @@ -188,8 +213,7 @@ static inline struct nfs_inode *NFS_I(struct inode *inode) #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_PROTO(inode) (NFS_SERVER(inode)->nfs_client->rpc_ops) #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) @@ -203,8 +227,7 @@ static inline struct nfs_inode *NFS_I(struct inode *inode) #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_STALE(inode) (test_bit(NFS_INO_STALE, &NFS_FLAGS(inode))) #define NFS_FILEID(inode) (NFS_I(inode)->fileid) @@ -213,10 +236,21 @@ static inline int nfs_caches_unstable(struct inode *inode) return atomic_read(&NFS_I(inode)->data_updates) != 0; } +static inline void nfs_mark_for_revalidate(struct inode *inode) +{ + struct nfs_inode *nfsi = NFS_I(inode); + + spin_lock(&inode->i_lock); + nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS; + if (S_ISDIR(inode->i_mode)) + nfsi->cache_validity |= NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA; + spin_unlock(&inode->i_lock); +} + static inline void NFS_CACHEINV(struct inode *inode) { if (!nfs_caches_unstable(inode)) - NFS_FLAGS(inode) |= NFS_INO_INVALID_ATTR; + nfs_mark_for_revalidate(inode); } static inline int nfs_server_capable(struct inode *inode, int cap) @@ -226,13 +260,7 @@ static inline int nfs_server_capable(struct inode *inode, int cap) static inline int NFS_USE_READDIRPLUS(struct inode *inode) { - return NFS_FLAGS(inode) & NFS_INO_ADVISE_RDPLUS; -} - -static inline -loff_t page_offset(struct page *page) -{ - return ((loff_t)page->index) << PAGE_CACHE_SHIFT; + return test_bit(NFS_INO_ADVISE_RDPLUS, &NFS_FLAGS(inode)); } /** @@ -256,77 +284,135 @@ static inline long nfs_save_change_attribute(struct inode *inode) 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; + && time_after_eq(chattr, NFS_I(inode)->cache_change_attribute); } /* * linux/fs/nfs/inode.c */ +extern int nfs_sync_mapping(struct address_space *mapping); +extern void nfs_zap_mapping(struct inode *inode, struct address_space *mapping); 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_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr); extern int nfs_getattr(struct vfsmount *, struct dentry *, struct kstat *); extern int nfs_permission(struct inode *, int, struct nameidata *); -extern void nfs_set_mmcred(struct inode *, struct rpc_cred *); +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 void nfs_access_zap_cache(struct inode *inode); 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_revalidate_mapping(struct inode *inode, struct address_space *mapping); +extern int nfs_revalidate_mapping_nolock(struct inode *inode, struct address_space *mapping); extern int nfs_setattr(struct dentry *, struct iattr *); +extern void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr); 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 *get_nfs_open_context(struct nfs_open_context *ctx); +extern void put_nfs_open_context(struct nfs_open_context *ctx); +extern struct nfs_open_context *nfs_find_open_context(struct inode *inode, struct rpc_cred *cred, int mode); /* linux/net/ipv4/ipconfig.c: trims ip addr off front of name, too. */ -extern u32 root_nfs_parse_addr(char *name); /*__init*/ +extern __be32 root_nfs_parse_addr(char *name); /*__init*/ + +static inline void nfs_fattr_init(struct nfs_fattr *fattr) +{ + fattr->valid = 0; + fattr->time_start = jiffies; +} /* * 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; +#ifdef CONFIG_NFS_V3 +extern struct inode_operations nfs3_file_inode_operations; +#endif /* CONFIG_NFS_V3 */ +extern const struct file_operations nfs_file_operations; +extern const struct address_space_operations nfs_file_aops; -static __inline__ struct rpc_cred * -nfs_file_cred(struct file *file) +static inline struct rpc_cred *nfs_file_cred(struct file *file) { - struct rpc_cred *cred = NULL; - if (file) - cred = (struct rpc_cred *)file->private_data; -#ifdef RPC_DEBUG - BUG_ON(cred && cred->cr_magic != RPCAUTH_CRED_MAGIC); -#endif - return cred; + if (file != NULL) { + struct nfs_open_context *ctx; + + ctx = (struct nfs_open_context*)file->private_data; + return ctx->cred; + } + return NULL; } +/* + * linux/fs/nfs/xattr.c + */ +#ifdef CONFIG_NFS_V3_ACL +extern ssize_t nfs3_listxattr(struct dentry *, char *, size_t); +extern ssize_t nfs3_getxattr(struct dentry *, const char *, void *, size_t); +extern int nfs3_setxattr(struct dentry *, const char *, + const void *, size_t, int); +extern int nfs3_removexattr (struct dentry *, const char *name); +#else +# define nfs3_listxattr NULL +# define nfs3_getxattr NULL +# define nfs3_setxattr NULL +# define nfs3_removexattr NULL +#endif + /* * 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); +extern ssize_t nfs_file_direct_read(struct kiocb *iocb, + const struct iovec *iov, unsigned long nr_segs, + loff_t pos); +extern ssize_t nfs_file_direct_write(struct kiocb *iocb, + const struct iovec *iov, unsigned long nr_segs, + loff_t pos); /* * linux/fs/nfs/dir.c */ extern struct inode_operations nfs_dir_inode_operations; -extern struct file_operations nfs_dir_operations; +#ifdef CONFIG_NFS_V3 +extern struct inode_operations nfs3_dir_inode_operations; +#endif /* CONFIG_NFS_V3 */ +extern const 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/locks.c + * linux/fs/nfs/sysctl.c + */ +#ifdef CONFIG_SYSCTL +extern int nfs_register_sysctl(void); +extern void nfs_unregister_sysctl(void); +#else +#define nfs_register_sysctl() 0 +#define nfs_unregister_sysctl() do { } while(0) +#endif + +/* + * linux/fs/nfs/namespace.c */ -extern int nfs_lock(struct file *, int, struct file_lock *); +extern struct list_head nfs_automount_list; +extern struct inode_operations nfs_mountpoint_inode_operations; +extern struct inode_operations nfs_referral_inode_operations; +extern int nfs_mountpoint_expiry_timeout; +extern void nfs_release_automount_timer(void); /* * linux/fs/nfs/unlink.c @@ -341,25 +427,27 @@ 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 +extern int nfs_writeback_done(struct rpc_task *, struct nfs_write_data *); +extern void nfs_writedata_release(void *); +extern int nfs_set_page_dirty(struct page *); /* * Try to write back everything synchronously (but check the * return value!) */ -extern int nfs_sync_inode(struct inode *, unsigned long, unsigned int, int); -extern int nfs_flush_inode(struct inode *, unsigned long, unsigned int, int); -extern int nfs_flush_list(struct list_head *, int, int); +extern long nfs_sync_mapping_wait(struct address_space *, struct writeback_control *, int); +extern int nfs_sync_mapping_range(struct address_space *, loff_t, loff_t, int); +extern int nfs_wb_all(struct inode *inode); +extern int nfs_wb_page(struct inode *inode, struct page* page); +extern int nfs_wb_page_priority(struct inode *inode, struct page* page, int how); #if defined(CONFIG_NFS_V3) || defined(CONFIG_NFS_V4) -extern int nfs_commit_inode(struct inode *, unsigned long, unsigned int, int); -extern int nfs_commit_list(struct list_head *, int); +extern int nfs_commit_inode(struct inode *, int); +extern struct nfs_write_data *nfs_commit_alloc(void); +extern void nfs_commit_free(struct nfs_write_data *wdata); +extern void nfs_commit_release(void *wdata); #else static inline int -nfs_commit_inode(struct inode *inode, unsigned long idx_start, unsigned int npages, int how) +nfs_commit_inode(struct inode *inode, int how) { return 0; } @@ -371,32 +459,10 @@ 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. + * Allocate nfs_write_data structures */ -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); -} - -/* Hack for future NFS swap support */ -#ifndef IS_SWAPFILE -# define IS_SWAPFILE(inode) (0) -#endif +extern struct nfs_write_data *nfs_writedata_alloc(size_t len); /* * linux/fs/nfs/read.c @@ -404,41 +470,47 @@ static inline int nfs_wb_page(struct inode *inode, struct page* page) extern int nfs_readpage(struct file *, struct page *); extern int nfs_readpages(struct file *, struct address_space *, struct list_head *, unsigned); -extern int nfs_pagein_list(struct list_head *, int); -extern void nfs_readpage_result(struct rpc_task *); +extern int nfs_readpage_result(struct rpc_task *, struct nfs_read_data *); +extern void nfs_readdata_release(void *data); /* - * linux/fs/mount_clnt.c - * (Used only by nfsroot module) + * Allocate nfs_read_data structures */ -extern int nfsroot_mount(struct sockaddr_in *, char *, struct nfs_fh *, - int, int); +extern struct nfs_read_data *nfs_readdata_alloc(size_t len); /* - * inline functions + * linux/fs/nfs3proc.c */ - -static inline int nfs_attribute_timeout(struct inode *inode) +#ifdef CONFIG_NFS_V3_ACL +extern struct posix_acl *nfs3_proc_getacl(struct inode *inode, int type); +extern int nfs3_proc_setacl(struct inode *inode, int type, + struct posix_acl *acl); +extern int nfs3_proc_set_default_acl(struct inode *dir, struct inode *inode, + mode_t mode); +extern void nfs3_forget_cached_acls(struct inode *inode); +#else +static inline int nfs3_proc_set_default_acl(struct inode *dir, + struct inode *inode, + mode_t mode) { - struct nfs_inode *nfsi = NFS_I(inode); - - return time_after(jiffies, nfsi->read_cache_jiffies+nfsi->attrtimeo); + return 0; } -/** - * nfs_revalidate_inode - Revalidate the inode attributes - * @server - pointer to nfs_server struct - * @inode - pointer to inode struct - * - * Updates inode attribute information by retrieving the data from the server. - */ -static inline int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) +static inline void nfs3_forget_cached_acls(struct inode *inode) { - if (!(NFS_FLAGS(inode) & (NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA)) - && !nfs_attribute_timeout(inode)) - return NFS_STALE(inode) ? -ESTALE : 0; - return __nfs_revalidate_inode(server, inode); } +#endif /* CONFIG_NFS_V3_ACL */ + +/* + * 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) @@ -477,213 +549,6 @@ extern void * nfs_root_data(void); #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, - NFS4CLNT_NEW, - NFS4CLNT_SETUP_STATE, -}; - -/* - * 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; - long cl_generation; - - 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_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; - - /* 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]; -}; - -/* - * 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 */ - unsigned int so_flags; /* protected by so_sema */ - atomic_t so_count; - long so_generation; - - struct rpc_cred *so_cred; /* Associated cred */ - struct list_head so_states; -}; - -/* - * 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 */ - struct nfs4_state * ls_parent; /* Parent nfs4_state */ - u32 ls_seqid; - u32 ls_id; - nfs4_stateid ls_stateid; - atomic_t ls_count; -}; - -/* bits for nfs4_state->flags */ -enum { - LK_STATE_IN_USE, -}; - -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; -}; - - -extern struct dentry_operations nfs4_dentry_operations; -extern struct inode_operations nfs4_dir_inode_operations; - -/* nfs4proc.c */ -extern int nfs4_proc_setclientid(struct nfs4_client *, u32, unsigned short); -extern int nfs4_proc_setclientid_confirm(struct nfs4_client *); -extern int nfs4_open_reclaim(struct nfs4_state_owner *, struct nfs4_state *); -extern int nfs4_proc_async_renew(struct nfs4_client *); -extern int nfs4_proc_renew(struct nfs4_client *); -extern int nfs4_do_close(struct inode *, struct nfs4_state *); -int nfs4_do_downgrade(struct inode *inode, struct nfs4_state *state, mode_t mode); -extern int nfs4_wait_clnt_recover(struct rpc_clnt *, struct nfs4_client *); -extern struct inode *nfs4_atomic_open(struct inode *, struct dentry *, struct nameidata *); -extern int nfs4_open_revalidate(struct inode *, struct dentry *, int); - -/* 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 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 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 int nfs4_handle_error(struct nfs_server *, int); -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_alloc_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 inode *, struct file_lock *, struct nfs4_lock_state *); -extern void nfs4_notify_unlck(struct inode *, 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_renewd_prepare_shutdown(server) do { } while (0) -#endif - #endif /* __KERNEL__ */ /* @@ -697,6 +562,8 @@ struct nfs4_mount_data; #define NFSDBG_XDR 0x0020 #define NFSDBG_FILE 0x0040 #define NFSDBG_ROOT 0x0080 +#define NFSDBG_CALLBACK 0x0100 +#define NFSDBG_CLIENT 0x0200 #define NFSDBG_ALL 0xFFFF #ifdef __KERNEL__