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Commit 4ce79717 authored by Trond Myklebust's avatar Trond Myklebust
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[PATCH] NFS: Header file cleanup... 

 - Move NFSv4 state definitions into a private header file.
 - Clean up gunk in nfs_fs.h
Signed-off-by: default avatarTrond Myklebust <Trond.Myklebust@netapp.com>
parent 9085bbcb
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Showing with 264 additions and 260 deletions
fs/nfs/callback.c
View file @ 4ce79717
...@@ -14,6 +14,7 @@ ...@@ -14,6 +14,7 @@
#include <linux/sunrpc/svc.h> #include <linux/sunrpc/svc.h>
#include <linux/sunrpc/svcsock.h> #include <linux/sunrpc/svcsock.h>
#include <linux/nfs_fs.h> #include <linux/nfs_fs.h>
#include "nfs4_fs.h"
#include "callback.h" #include "callback.h"
#define NFSDBG_FACILITY NFSDBG_CALLBACK #define NFSDBG_FACILITY NFSDBG_CALLBACK
......
fs/nfs/callback_proc.c
View file @ 4ce79717
...@@ -8,6 +8,7 @@ ...@@ -8,6 +8,7 @@
#include <linux/config.h> #include <linux/config.h>
#include <linux/nfs4.h> #include <linux/nfs4.h>
#include <linux/nfs_fs.h> #include <linux/nfs_fs.h>
#include "nfs4_fs.h"
#include "callback.h" #include "callback.h"
#include "delegation.h" #include "delegation.h"
......
fs/nfs/callback_xdr.c
View file @ 4ce79717
...@@ -10,6 +10,7 @@ ...@@ -10,6 +10,7 @@
#include <linux/sunrpc/svc.h> #include <linux/sunrpc/svc.h>
#include <linux/nfs4.h> #include <linux/nfs4.h>
#include <linux/nfs_fs.h> #include <linux/nfs_fs.h>
#include "nfs4_fs.h"
#include "callback.h" #include "callback.h"
#define CB_OP_TAGLEN_MAXSZ (512) #define CB_OP_TAGLEN_MAXSZ (512)
......
fs/nfs/delegation.c
View file @ 4ce79717
...@@ -16,6 +16,7 @@ ...@@ -16,6 +16,7 @@
#include <linux/nfs_fs.h> #include <linux/nfs_fs.h>
#include <linux/nfs_xdr.h> #include <linux/nfs_xdr.h>
#include "nfs4_fs.h"
#include "delegation.h" #include "delegation.h"
static struct nfs_delegation *nfs_alloc_delegation(void) static struct nfs_delegation *nfs_alloc_delegation(void)
......
fs/nfs/dir.c
View file @ 4ce79717
...@@ -32,6 +32,7 @@ ...@@ -32,6 +32,7 @@
#include <linux/smp_lock.h> #include <linux/smp_lock.h>
#include <linux/namei.h> #include <linux/namei.h>
#include "nfs4_fs.h"
#include "delegation.h" #include "delegation.h"
#define NFS_PARANOIA 1 #define NFS_PARANOIA 1
......
fs/nfs/idmap.c
View file @ 4ce79717
...@@ -50,6 +50,7 @@ ...@@ -50,6 +50,7 @@
#include <linux/nfs_fs.h> #include <linux/nfs_fs.h>
#include <linux/nfs_idmap.h> #include <linux/nfs_idmap.h>
#include "nfs4_fs.h"
#define IDMAP_HASH_SZ 128 #define IDMAP_HASH_SZ 128
......
fs/nfs/inode.c
View file @ 4ce79717
...@@ -39,6 +39,7 @@ ...@@ -39,6 +39,7 @@
#include <asm/system.h> #include <asm/system.h>
#include <asm/uaccess.h> #include <asm/uaccess.h>
#include "nfs4_fs.h"
#include "delegation.h" #include "delegation.h"
#define NFSDBG_FACILITY NFSDBG_VFS #define NFSDBG_FACILITY NFSDBG_VFS
......
fs/nfs/nfs4_fs.h 0 → 100644
View file @ 4ce79717
/*
* linux/fs/nfs/nfs4_fs.h
*
* Copyright (C) 2005 Trond Myklebust
*
* NFSv4-specific filesystem definitions and declarations
*/
#ifndef __LINUX_FS_NFS_NFS4_FS_H
#define __LINUX_FS_NFS_NFS4_FS_H
#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;
extern const u32 nfs4_fattr_bitmap[2];
extern const u32 nfs4_statfs_bitmap[2];
extern const u32 nfs4_pathconf_bitmap[2];
extern const u32 nfs4_fsinfo_bitmap[2];
/* 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 *);
extern void nfs4_renew_state(void *);
/* 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);
extern const nfs4_stateid zero_stateid;
/* nfs4xdr.c */
extern uint32_t *nfs4_decode_dirent(uint32_t *p, struct nfs_entry *entry, int plus);
extern struct rpc_procinfo nfs4_procedures[];
struct nfs4_mount_data;
/* callback_xdr.c */
extern struct svc_version nfs4_callback_version1;
#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)
#endif /* CONFIG_NFS_V4 */
#endif /* __LINUX_FS_NFS_NFS4_FS.H */
fs/nfs/nfs4proc.c
View file @ 4ce79717
...@@ -48,6 +48,7 @@ ...@@ -48,6 +48,7 @@
#include <linux/smp_lock.h> #include <linux/smp_lock.h>
#include <linux/namei.h> #include <linux/namei.h>
#include "nfs4_fs.h"
#include "delegation.h" #include "delegation.h"
#define NFSDBG_FACILITY NFSDBG_PROC #define NFSDBG_FACILITY NFSDBG_PROC
...@@ -62,8 +63,6 @@ static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struc ...@@ -62,8 +63,6 @@ static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struc
extern u32 *nfs4_decode_dirent(u32 *p, struct nfs_entry *entry, int plus); extern u32 *nfs4_decode_dirent(u32 *p, struct nfs_entry *entry, int plus);
extern struct rpc_procinfo nfs4_procedures[]; extern struct rpc_procinfo nfs4_procedures[];
extern nfs4_stateid zero_stateid;
/* Prevent leaks of NFSv4 errors into userland */ /* Prevent leaks of NFSv4 errors into userland */
int nfs4_map_errors(int err) int nfs4_map_errors(int err)
{ {
...@@ -104,7 +103,7 @@ const u32 nfs4_statfs_bitmap[2] = { ...@@ -104,7 +103,7 @@ const u32 nfs4_statfs_bitmap[2] = {
| FATTR4_WORD1_SPACE_TOTAL | FATTR4_WORD1_SPACE_TOTAL
}; };
u32 nfs4_pathconf_bitmap[2] = { const u32 nfs4_pathconf_bitmap[2] = {
FATTR4_WORD0_MAXLINK FATTR4_WORD0_MAXLINK
| FATTR4_WORD0_MAXNAME, | FATTR4_WORD0_MAXNAME,
0 0
......
fs/nfs/nfs4renewd.c
View file @ 4ce79717
...@@ -53,6 +53,7 @@ ...@@ -53,6 +53,7 @@
#include <linux/nfs.h> #include <linux/nfs.h>
#include <linux/nfs4.h> #include <linux/nfs4.h>
#include <linux/nfs_fs.h> #include <linux/nfs_fs.h>
#include "nfs4_fs.h"
#define NFSDBG_FACILITY NFSDBG_PROC #define NFSDBG_FACILITY NFSDBG_PROC
......
fs/nfs/nfs4state.c
View file @ 4ce79717
...@@ -46,24 +46,18 @@ ...@@ -46,24 +46,18 @@
#include <linux/workqueue.h> #include <linux/workqueue.h>
#include <linux/bitops.h> #include <linux/bitops.h>
#include "nfs4_fs.h"
#include "callback.h" #include "callback.h"
#include "delegation.h" #include "delegation.h"
#define OPENOWNER_POOL_SIZE 8 #define OPENOWNER_POOL_SIZE 8
static DEFINE_SPINLOCK(state_spinlock); const nfs4_stateid zero_stateid;
nfs4_stateid zero_stateid;
#if 0
nfs4_stateid one_stateid =
{ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
#endif
static DEFINE_SPINLOCK(state_spinlock);
static LIST_HEAD(nfs4_clientid_list); static LIST_HEAD(nfs4_clientid_list);
static void nfs4_recover_state(void *); static void nfs4_recover_state(void *);
extern void nfs4_renew_state(void *);
void void
init_nfsv4_state(struct nfs_server *server) init_nfsv4_state(struct nfs_server *server)
......
fs/nfs/nfs4xdr.c
View file @ 4ce79717
...@@ -51,6 +51,7 @@ ...@@ -51,6 +51,7 @@
#include <linux/nfs4.h> #include <linux/nfs4.h>
#include <linux/nfs_fs.h> #include <linux/nfs_fs.h>
#include <linux/nfs_idmap.h> #include <linux/nfs_idmap.h>
#include "nfs4_fs.h"
#define NFSDBG_FACILITY NFSDBG_XDR #define NFSDBG_FACILITY NFSDBG_XDR
...@@ -660,8 +661,6 @@ static int encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1 ...@@ -660,8 +661,6 @@ static int encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1
static int encode_getfattr(struct xdr_stream *xdr, const u32* bitmask) static int encode_getfattr(struct xdr_stream *xdr, const u32* bitmask)
{ {
extern u32 nfs4_fattr_bitmap[];
return encode_getattr_two(xdr, return encode_getattr_two(xdr,
bitmask[0] & nfs4_fattr_bitmap[0], bitmask[0] & nfs4_fattr_bitmap[0],
bitmask[1] & nfs4_fattr_bitmap[1]); bitmask[1] & nfs4_fattr_bitmap[1]);
...@@ -669,8 +668,6 @@ static int encode_getfattr(struct xdr_stream *xdr, const u32* bitmask) ...@@ -669,8 +668,6 @@ static int encode_getfattr(struct xdr_stream *xdr, const u32* bitmask)
static int encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask) static int encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask)
{ {
extern u32 nfs4_fsinfo_bitmap[];
return encode_getattr_two(xdr, bitmask[0] & nfs4_fsinfo_bitmap[0], return encode_getattr_two(xdr, bitmask[0] & nfs4_fsinfo_bitmap[0],
bitmask[1] & nfs4_fsinfo_bitmap[1]); bitmask[1] & nfs4_fsinfo_bitmap[1]);
} }
...@@ -969,7 +966,6 @@ static int encode_putrootfh(struct xdr_stream *xdr) ...@@ -969,7 +966,6 @@ static int encode_putrootfh(struct xdr_stream *xdr)
static void encode_stateid(struct xdr_stream *xdr, const struct nfs_open_context *ctx) static void encode_stateid(struct xdr_stream *xdr, const struct nfs_open_context *ctx)
{ {
extern nfs4_stateid zero_stateid;
nfs4_stateid stateid; nfs4_stateid stateid;
uint32_t *p; uint32_t *p;
...@@ -1697,7 +1693,6 @@ static int nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, uint32_t *p, struct nfs4_fs ...@@ -1697,7 +1693,6 @@ static int nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, uint32_t *p, struct nfs4_fs
*/ */
static int nfs4_xdr_enc_pathconf(struct rpc_rqst *req, uint32_t *p, const struct nfs4_pathconf_arg *args) static int nfs4_xdr_enc_pathconf(struct rpc_rqst *req, uint32_t *p, const struct nfs4_pathconf_arg *args)
{ {
extern u32 nfs4_pathconf_bitmap[2];
struct xdr_stream xdr; struct xdr_stream xdr;
struct compound_hdr hdr = { struct compound_hdr hdr = {
.nops = 2, .nops = 2,
...@@ -1718,7 +1713,6 @@ static int nfs4_xdr_enc_pathconf(struct rpc_rqst *req, uint32_t *p, const struct ...@@ -1718,7 +1713,6 @@ static int nfs4_xdr_enc_pathconf(struct rpc_rqst *req, uint32_t *p, const struct
*/ */
static int nfs4_xdr_enc_statfs(struct rpc_rqst *req, uint32_t *p, const struct nfs4_statfs_arg *args) static int nfs4_xdr_enc_statfs(struct rpc_rqst *req, uint32_t *p, const struct nfs4_statfs_arg *args)
{ {
extern u32 nfs4_statfs_bitmap[];
struct xdr_stream xdr; struct xdr_stream xdr;
struct compound_hdr hdr = { struct compound_hdr hdr = {
.nops = 2, .nops = 2,
......
include/linux/nfs_fs.h
View file @ 4ce79717
...@@ -15,7 +15,6 @@ ...@@ -15,7 +15,6 @@
#include <linux/pagemap.h> #include <linux/pagemap.h>
#include <linux/rwsem.h> #include <linux/rwsem.h>
#include <linux/wait.h> #include <linux/wait.h>
#include <linux/uio.h>
#include <linux/nfs_fs_sb.h> #include <linux/nfs_fs_sb.h>
...@@ -29,7 +28,6 @@ ...@@ -29,7 +28,6 @@
#include <linux/nfs4.h> #include <linux/nfs4.h>
#include <linux/nfs_xdr.h> #include <linux/nfs_xdr.h>
#include <linux/rwsem.h> #include <linux/rwsem.h>
#include <linux/workqueue.h>
#include <linux/mempool.h> #include <linux/mempool.h>
/* /*
...@@ -43,13 +41,6 @@ ...@@ -43,13 +41,6 @@
#define NFS_MAX_FILE_IO_BUFFER_SIZE 32768 #define NFS_MAX_FILE_IO_BUFFER_SIZE 32768
#define NFS_DEF_FILE_IO_BUFFER_SIZE 4096 #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 * superblock magic number for NFS
*/ */
...@@ -60,9 +51,6 @@ ...@@ -60,9 +51,6 @@
*/ */
#define NFS_RPC_SWAPFLAGS (RPC_TASK_SWAPPER|RPC_TASK_ROOTCREDS) #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 * When flushing a cluster of dirty pages, there can be different
* strategies: * strategies:
...@@ -434,11 +422,6 @@ static inline void nfs_writedata_free(struct nfs_write_data *p) ...@@ -434,11 +422,6 @@ static inline void nfs_writedata_free(struct nfs_write_data *p)
mempool_free(p, nfs_wdata_mempool); 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 * linux/fs/nfs/read.c
*/ */
...@@ -515,230 +498,6 @@ extern void * nfs_root_data(void); ...@@ -515,230 +498,6 @@ extern void * nfs_root_data(void);
#define NFS_JUKEBOX_RETRY_TIME (5 * HZ) #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__ */ #endif /* __KERNEL__ */
/* /*
......
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