768 lines
22 KiB
C
768 lines
22 KiB
C
/*
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* linux/include/linux/nfs_fs.h
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*
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* Copyright (C) 1992 Rick Sladkey
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*
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* OS-specific nfs filesystem definitions and declarations
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*/
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#ifndef _LINUX_NFS_FS_H
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#define _LINUX_NFS_FS_H
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#include <linux/config.h>
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#include <linux/in.h>
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#include <linux/mm.h>
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#include <linux/pagemap.h>
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#include <linux/rwsem.h>
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#include <linux/wait.h>
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#include <linux/uio.h>
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#include <linux/nfs_fs_sb.h>
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#include <linux/sunrpc/debug.h>
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#include <linux/sunrpc/auth.h>
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#include <linux/sunrpc/clnt.h>
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#include <linux/nfs.h>
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#include <linux/nfs2.h>
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#include <linux/nfs3.h>
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#include <linux/nfs4.h>
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#include <linux/nfs_xdr.h>
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#include <linux/rwsem.h>
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#include <linux/workqueue.h>
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#include <linux/mempool.h>
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/*
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* Enable debugging support for nfs client.
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* Requires RPC_DEBUG.
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*/
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#ifdef RPC_DEBUG
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# define NFS_DEBUG
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#endif
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#define NFS_MAX_FILE_IO_BUFFER_SIZE 32768
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#define NFS_DEF_FILE_IO_BUFFER_SIZE 4096
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/*
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* The upper limit on timeouts for the exponential backoff algorithm.
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*/
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#define NFS_WRITEBACK_DELAY (5*HZ)
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#define NFS_WRITEBACK_LOCKDELAY (60*HZ)
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#define NFS_COMMIT_DELAY (5*HZ)
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/*
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* superblock magic number for NFS
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*/
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#define NFS_SUPER_MAGIC 0x6969
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/*
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* These are the default flags for swap requests
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*/
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#define NFS_RPC_SWAPFLAGS (RPC_TASK_SWAPPER|RPC_TASK_ROOTCREDS)
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#define NFS_RW_SYNC 0x0001 /* O_SYNC handling */
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#define NFS_RW_SWAP 0x0002 /* This is a swap request */
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/*
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* When flushing a cluster of dirty pages, there can be different
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* strategies:
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*/
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#define FLUSH_AGING 0 /* only flush old buffers */
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#define FLUSH_SYNC 1 /* file being synced, or contention */
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#define FLUSH_WAIT 2 /* wait for completion */
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#define FLUSH_STABLE 4 /* commit to stable storage */
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#define FLUSH_LOWPRI 8 /* low priority background flush */
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#define FLUSH_HIGHPRI 16 /* high priority memory reclaim flush */
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#ifdef __KERNEL__
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/*
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* NFSv3/v4 Access mode cache entry
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*/
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struct nfs_access_entry {
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unsigned long jiffies;
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struct rpc_cred * cred;
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int mask;
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};
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struct nfs4_state;
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struct nfs_open_context {
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atomic_t count;
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struct dentry *dentry;
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struct rpc_cred *cred;
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struct nfs4_state *state;
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fl_owner_t lockowner;
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int mode;
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int error;
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struct list_head list;
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wait_queue_head_t waitq;
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};
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/*
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* NFSv4 delegation
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*/
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struct nfs_delegation;
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/*
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* nfs fs inode data in memory
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*/
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struct nfs_inode {
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/*
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* The 64bit 'inode number'
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*/
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__u64 fileid;
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/*
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* NFS file handle
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*/
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struct nfs_fh fh;
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/*
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* Various flags
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*/
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unsigned int flags;
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/*
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* read_cache_jiffies is when we started read-caching this inode,
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* and read_cache_mtime is the mtime of the inode at that time.
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* attrtimeo is for how long the cached information is assumed
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* to be valid. A successful attribute revalidation doubles
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* attrtimeo (up to acregmax/acdirmax), a failure resets it to
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* acregmin/acdirmin.
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*
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* We need to revalidate the cached attrs for this inode if
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*
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* jiffies - read_cache_jiffies > attrtimeo
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*
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* and invalidate any cached data/flush out any dirty pages if
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* we find that
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*
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* mtime != read_cache_mtime
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*/
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unsigned long readdir_timestamp;
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unsigned long read_cache_jiffies;
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unsigned long attrtimeo;
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unsigned long attrtimeo_timestamp;
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__u64 change_attr; /* v4 only */
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/* "Generation counter" for the attribute cache. This is
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* bumped whenever we update the metadata on the
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* server.
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*/
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unsigned long cache_change_attribute;
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/*
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* Counter indicating the number of outstanding requests that
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* will cause a file data update.
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*/
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atomic_t data_updates;
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struct nfs_access_entry cache_access;
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/*
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* This is the cookie verifier used for NFSv3 readdir
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* operations
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*/
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__u32 cookieverf[2];
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/*
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* This is the list of dirty unwritten pages.
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*/
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spinlock_t req_lock;
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struct list_head dirty;
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struct list_head commit;
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struct radix_tree_root nfs_page_tree;
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unsigned int ndirty,
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ncommit,
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npages;
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/* Open contexts for shared mmap writes */
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struct list_head open_files;
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wait_queue_head_t nfs_i_wait;
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#ifdef CONFIG_NFS_V4
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/* NFSv4 state */
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struct list_head open_states;
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struct nfs_delegation *delegation;
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int delegation_state;
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struct rw_semaphore rwsem;
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#endif /* CONFIG_NFS_V4*/
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struct inode vfs_inode;
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};
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/*
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* Legal inode flag values
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*/
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#define NFS_INO_STALE 0x0001 /* possible stale inode */
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#define NFS_INO_ADVISE_RDPLUS 0x0002 /* advise readdirplus */
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#define NFS_INO_REVALIDATING 0x0004 /* revalidating attrs */
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#define NFS_INO_INVALID_ATTR 0x0008 /* cached attrs are invalid */
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#define NFS_INO_INVALID_DATA 0x0010 /* cached data is invalid */
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#define NFS_INO_INVALID_ATIME 0x0020 /* cached atime is invalid */
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#define NFS_INO_INVALID_ACCESS 0x0040 /* cached access cred invalid */
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static inline struct nfs_inode *NFS_I(struct inode *inode)
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{
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return container_of(inode, struct nfs_inode, vfs_inode);
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}
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#define NFS_SB(s) ((struct nfs_server *)(s->s_fs_info))
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#define NFS_FH(inode) (&NFS_I(inode)->fh)
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#define NFS_SERVER(inode) (NFS_SB(inode->i_sb))
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#define NFS_CLIENT(inode) (NFS_SERVER(inode)->client)
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#define NFS_PROTO(inode) (NFS_SERVER(inode)->rpc_ops)
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#define NFS_ADDR(inode) (RPC_PEERADDR(NFS_CLIENT(inode)))
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#define NFS_COOKIEVERF(inode) (NFS_I(inode)->cookieverf)
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#define NFS_READTIME(inode) (NFS_I(inode)->read_cache_jiffies)
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#define NFS_CHANGE_ATTR(inode) (NFS_I(inode)->change_attr)
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#define NFS_ATTRTIMEO(inode) (NFS_I(inode)->attrtimeo)
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#define NFS_MINATTRTIMEO(inode) \
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(S_ISDIR(inode->i_mode)? NFS_SERVER(inode)->acdirmin \
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: NFS_SERVER(inode)->acregmin)
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#define NFS_MAXATTRTIMEO(inode) \
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(S_ISDIR(inode->i_mode)? NFS_SERVER(inode)->acdirmax \
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: NFS_SERVER(inode)->acregmax)
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#define NFS_ATTRTIMEO_UPDATE(inode) (NFS_I(inode)->attrtimeo_timestamp)
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#define NFS_FLAGS(inode) (NFS_I(inode)->flags)
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#define NFS_REVALIDATING(inode) (NFS_FLAGS(inode) & NFS_INO_REVALIDATING)
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#define NFS_STALE(inode) (NFS_FLAGS(inode) & NFS_INO_STALE)
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#define NFS_FILEID(inode) (NFS_I(inode)->fileid)
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static inline int nfs_caches_unstable(struct inode *inode)
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{
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return atomic_read(&NFS_I(inode)->data_updates) != 0;
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}
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static inline void NFS_CACHEINV(struct inode *inode)
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{
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if (!nfs_caches_unstable(inode))
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NFS_FLAGS(inode) |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS;
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}
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static inline int nfs_server_capable(struct inode *inode, int cap)
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{
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return NFS_SERVER(inode)->caps & cap;
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}
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static inline int NFS_USE_READDIRPLUS(struct inode *inode)
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{
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return NFS_FLAGS(inode) & NFS_INO_ADVISE_RDPLUS;
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}
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/**
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* nfs_save_change_attribute - Returns the inode attribute change cookie
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* @inode - pointer to inode
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* The "change attribute" is updated every time we finish an operation
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* that will result in a metadata change on the server.
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*/
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static inline long nfs_save_change_attribute(struct inode *inode)
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{
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return NFS_I(inode)->cache_change_attribute;
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}
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/**
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* nfs_verify_change_attribute - Detects NFS inode cache updates
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* @inode - pointer to inode
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* @chattr - previously saved change attribute
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* Return "false" if metadata has been updated (or is in the process of
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* being updated) since the change attribute was saved.
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*/
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static inline int nfs_verify_change_attribute(struct inode *inode, unsigned long chattr)
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{
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return !nfs_caches_unstable(inode)
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&& chattr == NFS_I(inode)->cache_change_attribute;
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}
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/*
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* linux/fs/nfs/inode.c
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*/
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extern void nfs_zap_caches(struct inode *);
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extern struct inode *nfs_fhget(struct super_block *, struct nfs_fh *,
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struct nfs_fattr *);
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extern int nfs_refresh_inode(struct inode *, struct nfs_fattr *);
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extern int nfs_getattr(struct vfsmount *, struct dentry *, struct kstat *);
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extern int nfs_permission(struct inode *, int, struct nameidata *);
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extern int nfs_access_get_cached(struct inode *, struct rpc_cred *, struct nfs_access_entry *);
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extern void nfs_access_add_cache(struct inode *, struct nfs_access_entry *);
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extern int nfs_open(struct inode *, struct file *);
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extern int nfs_release(struct inode *, struct file *);
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extern int nfs_attribute_timeout(struct inode *inode);
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extern int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode);
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extern int __nfs_revalidate_inode(struct nfs_server *, struct inode *);
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extern int nfs_setattr(struct dentry *, struct iattr *);
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extern void nfs_begin_attr_update(struct inode *);
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extern void nfs_end_attr_update(struct inode *);
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extern void nfs_begin_data_update(struct inode *);
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extern void nfs_end_data_update(struct inode *);
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extern void nfs_end_data_update_defer(struct inode *);
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extern struct nfs_open_context *alloc_nfs_open_context(struct dentry *dentry, struct rpc_cred *cred);
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extern struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx);
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extern void put_nfs_open_context(struct nfs_open_context *ctx);
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extern void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx);
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extern struct nfs_open_context *nfs_find_open_context(struct inode *inode, int mode);
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extern void nfs_file_clear_open_context(struct file *filp);
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/* linux/net/ipv4/ipconfig.c: trims ip addr off front of name, too. */
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extern u32 root_nfs_parse_addr(char *name); /*__init*/
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/*
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* linux/fs/nfs/file.c
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*/
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extern struct inode_operations nfs_file_inode_operations;
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extern struct file_operations nfs_file_operations;
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extern struct address_space_operations nfs_file_aops;
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static inline struct rpc_cred *nfs_file_cred(struct file *file)
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{
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if (file != NULL) {
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struct nfs_open_context *ctx;
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ctx = (struct nfs_open_context*)file->private_data;
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return ctx->cred;
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}
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return NULL;
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}
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/*
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* linux/fs/nfs/direct.c
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*/
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extern ssize_t nfs_direct_IO(int, struct kiocb *, const struct iovec *, loff_t,
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unsigned long);
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extern ssize_t nfs_file_direct_read(struct kiocb *iocb, char __user *buf,
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size_t count, loff_t pos);
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extern ssize_t nfs_file_direct_write(struct kiocb *iocb, const char __user *buf,
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size_t count, loff_t pos);
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/*
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* linux/fs/nfs/dir.c
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*/
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extern struct inode_operations nfs_dir_inode_operations;
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extern struct file_operations nfs_dir_operations;
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extern struct dentry_operations nfs_dentry_operations;
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extern int nfs_instantiate(struct dentry *dentry, struct nfs_fh *fh, struct nfs_fattr *fattr);
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/*
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* linux/fs/nfs/symlink.c
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*/
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extern struct inode_operations nfs_symlink_inode_operations;
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/*
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* linux/fs/nfs/unlink.c
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*/
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extern int nfs_async_unlink(struct dentry *);
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extern void nfs_complete_unlink(struct dentry *);
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/*
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* linux/fs/nfs/write.c
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*/
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extern int nfs_writepage(struct page *page, struct writeback_control *wbc);
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extern int nfs_writepages(struct address_space *, struct writeback_control *);
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extern int nfs_flush_incompatible(struct file *file, struct page *page);
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extern int nfs_updatepage(struct file *, struct page *, unsigned int, unsigned int);
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extern void nfs_writeback_done(struct rpc_task *task);
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#if defined(CONFIG_NFS_V3) || defined(CONFIG_NFS_V4)
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extern void nfs_commit_done(struct rpc_task *);
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#endif
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/*
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* Try to write back everything synchronously (but check the
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* return value!)
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*/
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extern int nfs_sync_inode(struct inode *, unsigned long, unsigned int, int);
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#if defined(CONFIG_NFS_V3) || defined(CONFIG_NFS_V4)
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extern int nfs_commit_inode(struct inode *, unsigned long, unsigned int, int);
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#else
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static inline int
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nfs_commit_inode(struct inode *inode, unsigned long idx_start, unsigned int npages, int how)
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{
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return 0;
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}
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#endif
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static inline int
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nfs_have_writebacks(struct inode *inode)
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{
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return NFS_I(inode)->npages != 0;
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}
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static inline int
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nfs_wb_all(struct inode *inode)
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{
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int error = nfs_sync_inode(inode, 0, 0, FLUSH_WAIT);
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return (error < 0) ? error : 0;
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}
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/*
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* Write back all requests on one page - we do this before reading it.
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*/
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static inline int nfs_wb_page_priority(struct inode *inode, struct page* page, int how)
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{
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int error = nfs_sync_inode(inode, page->index, 1,
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how | FLUSH_WAIT | FLUSH_STABLE);
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return (error < 0) ? error : 0;
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}
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static inline int nfs_wb_page(struct inode *inode, struct page* page)
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{
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return nfs_wb_page_priority(inode, page, 0);
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}
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/*
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* Allocate and free nfs_write_data structures
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*/
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extern mempool_t *nfs_wdata_mempool;
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static inline struct nfs_write_data *nfs_writedata_alloc(void)
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{
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struct nfs_write_data *p = mempool_alloc(nfs_wdata_mempool, SLAB_NOFS);
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if (p) {
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memset(p, 0, sizeof(*p));
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INIT_LIST_HEAD(&p->pages);
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}
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return p;
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}
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static inline void nfs_writedata_free(struct nfs_write_data *p)
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{
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mempool_free(p, nfs_wdata_mempool);
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}
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/* Hack for future NFS swap support */
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#ifndef IS_SWAPFILE
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# define IS_SWAPFILE(inode) (0)
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#endif
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/*
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* linux/fs/nfs/read.c
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*/
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extern int nfs_readpage(struct file *, struct page *);
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extern int nfs_readpages(struct file *, struct address_space *,
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struct list_head *, unsigned);
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extern void nfs_readpage_result(struct rpc_task *);
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/*
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* Allocate and free nfs_read_data structures
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*/
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extern mempool_t *nfs_rdata_mempool;
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static inline struct nfs_read_data *nfs_readdata_alloc(void)
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{
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struct nfs_read_data *p = mempool_alloc(nfs_rdata_mempool, SLAB_NOFS);
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if (p)
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memset(p, 0, sizeof(*p));
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return p;
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}
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static inline void nfs_readdata_free(struct nfs_read_data *p)
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{
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mempool_free(p, nfs_rdata_mempool);
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}
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extern void nfs_readdata_release(struct rpc_task *task);
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/*
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* linux/fs/mount_clnt.c
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* (Used only by nfsroot module)
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*/
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extern int nfsroot_mount(struct sockaddr_in *, char *, struct nfs_fh *,
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int, int);
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/*
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* inline functions
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*/
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static inline loff_t
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nfs_size_to_loff_t(__u64 size)
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{
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loff_t maxsz = (((loff_t) ULONG_MAX) << PAGE_CACHE_SHIFT) + PAGE_CACHE_SIZE - 1;
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if (size > maxsz)
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return maxsz;
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return (loff_t) size;
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}
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static inline ino_t
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nfs_fileid_to_ino_t(u64 fileid)
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{
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ino_t ino = (ino_t) fileid;
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if (sizeof(ino_t) < sizeof(u64))
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ino ^= fileid >> (sizeof(u64)-sizeof(ino_t)) * 8;
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return ino;
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}
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/* NFS root */
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extern void * nfs_root_data(void);
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#define nfs_wait_event(clnt, wq, condition) \
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({ \
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int __retval = 0; \
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if (clnt->cl_intr) { \
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sigset_t oldmask; \
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rpc_clnt_sigmask(clnt, &oldmask); \
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__retval = wait_event_interruptible(wq, condition); \
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rpc_clnt_sigunmask(clnt, &oldmask); \
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} else \
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wait_event(wq, condition); \
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__retval; \
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})
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#define NFS_JUKEBOX_RETRY_TIME (5 * HZ)
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#ifdef CONFIG_NFS_V4
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struct idmap;
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/*
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* In a seqid-mutating op, this macro controls which error return
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* values trigger incrementation of the seqid.
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*
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* from rfc 3010:
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* The client MUST monotonically increment the sequence number for the
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* CLOSE, LOCK, LOCKU, OPEN, OPEN_CONFIRM, and OPEN_DOWNGRADE
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* operations. This is true even in the event that the previous
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* operation that used the sequence number received an error. The only
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* exception to this rule is if the previous operation received one of
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* the following errors: NFSERR_STALE_CLIENTID, NFSERR_STALE_STATEID,
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* NFSERR_BAD_STATEID, NFSERR_BAD_SEQID, NFSERR_BADXDR,
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* NFSERR_RESOURCE, NFSERR_NOFILEHANDLE.
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*
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*/
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#define seqid_mutating_err(err) \
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(((err) != NFSERR_STALE_CLIENTID) && \
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((err) != NFSERR_STALE_STATEID) && \
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((err) != NFSERR_BAD_STATEID) && \
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((err) != NFSERR_BAD_SEQID) && \
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((err) != NFSERR_BAD_XDR) && \
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((err) != NFSERR_RESOURCE) && \
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((err) != NFSERR_NOFILEHANDLE))
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enum nfs4_client_state {
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NFS4CLNT_OK = 0,
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};
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/*
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* The nfs4_client identifies our client state to the server.
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*/
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struct nfs4_client {
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struct list_head cl_servers; /* Global list of servers */
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struct in_addr cl_addr; /* Server identifier */
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u64 cl_clientid; /* constant */
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nfs4_verifier cl_confirm;
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unsigned long cl_state;
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u32 cl_lockowner_id;
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/*
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* The following rwsem ensures exclusive access to the server
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* while we recover the state following a lease expiration.
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*/
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struct rw_semaphore cl_sem;
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struct list_head cl_delegations;
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struct list_head cl_state_owners;
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struct list_head cl_unused;
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int cl_nunused;
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spinlock_t cl_lock;
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atomic_t cl_count;
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struct rpc_clnt * cl_rpcclient;
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struct rpc_cred * cl_cred;
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struct list_head cl_superblocks; /* List of nfs_server structs */
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unsigned long cl_lease_time;
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unsigned long cl_last_renewal;
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struct work_struct cl_renewd;
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struct work_struct cl_recoverd;
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wait_queue_head_t cl_waitq;
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struct rpc_wait_queue cl_rpcwaitq;
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/* used for the setclientid verifier */
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struct timespec cl_boot_time;
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/* idmapper */
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struct idmap * cl_idmap;
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/* Our own IP address, as a null-terminated string.
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* This is used to generate the clientid, and the callback address.
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*/
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char cl_ipaddr[16];
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unsigned char cl_id_uniquifier;
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};
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/*
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* NFS4 state_owners and lock_owners are simply labels for ordered
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* sequences of RPC calls. Their sole purpose is to provide once-only
|
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* semantics by allowing the server to identify replayed requests.
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*
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* The ->so_sema is held during all state_owner seqid-mutating operations:
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* OPEN, OPEN_DOWNGRADE, and CLOSE. Its purpose is to properly serialize
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* so_seqid.
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*/
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struct nfs4_state_owner {
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struct list_head so_list; /* per-clientid list of state_owners */
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struct nfs4_client *so_client;
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u32 so_id; /* 32-bit identifier, unique */
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struct semaphore so_sema;
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u32 so_seqid; /* protected by so_sema */
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atomic_t so_count;
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struct rpc_cred *so_cred; /* Associated cred */
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struct list_head so_states;
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struct list_head so_delegations;
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};
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/*
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* struct nfs4_state maintains the client-side state for a given
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* (state_owner,inode) tuple (OPEN) or state_owner (LOCK).
|
|
*
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* OPEN:
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|
* 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.
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|
*
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* LOCK: one nfs4_state (LOCK) to hold the lock stateid nfs4_state(OPEN)
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|
*/
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struct nfs4_lock_state {
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|
struct list_head ls_locks; /* Other lock stateids */
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|
fl_owner_t ls_owner; /* POSIX lock owner */
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|
#define NFS_LOCK_INITIALIZED 1
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|
int ls_flags;
|
|
u32 ls_seqid;
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|
u32 ls_id;
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|
nfs4_stateid ls_stateid;
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|
atomic_t ls_count;
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|
};
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|
|
/* bits for nfs4_state->flags */
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|
enum {
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|
LK_STATE_IN_USE,
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|
NFS_DELEGATED_STATE,
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|
};
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|
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struct nfs4_state {
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struct list_head open_states; /* List of states for the same state_owner */
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|
struct list_head inode_states; /* List of states for the same inode */
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|
struct list_head lock_states; /* List of subservient lock stateids */
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struct nfs4_state_owner *owner; /* Pointer to the open owner */
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|
struct inode *inode; /* Pointer to the inode */
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|
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unsigned long flags; /* Do we hold any locks? */
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struct semaphore lock_sema; /* Serializes file locking operations */
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|
rwlock_t state_lock; /* Protects the lock_states list */
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|
|
nfs4_stateid stateid;
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|
|
|
unsigned int nreaders;
|
|
unsigned int nwriters;
|
|
int state; /* State on the server (R,W, or RW) */
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|
atomic_t count;
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|
};
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|
|
|
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struct nfs4_exception {
|
|
long timeout;
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|
int retry;
|
|
};
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|
|
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struct nfs4_state_recovery_ops {
|
|
int (*recover_open)(struct nfs4_state_owner *, struct nfs4_state *);
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|
int (*recover_lock)(struct nfs4_state *, struct file_lock *);
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|
};
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|
|
|
extern struct dentry_operations nfs4_dentry_operations;
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|
extern struct inode_operations nfs4_dir_inode_operations;
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|
|
|
/* nfs4proc.c */
|
|
extern int nfs4_map_errors(int err);
|
|
extern int nfs4_proc_setclientid(struct nfs4_client *, u32, unsigned short);
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|
extern int nfs4_proc_setclientid_confirm(struct nfs4_client *);
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|
extern int nfs4_proc_async_renew(struct nfs4_client *);
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|
extern int nfs4_proc_renew(struct nfs4_client *);
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|
extern int nfs4_do_close(struct inode *inode, struct nfs4_state *state, mode_t mode);
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|
extern struct inode *nfs4_atomic_open(struct inode *, struct dentry *, struct nameidata *);
|
|
extern int nfs4_open_revalidate(struct inode *, struct dentry *, int);
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|
|
|
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 *);
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|
|
|
/* 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
|