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authorTrond Myklebust <Trond.Myklebust@netapp.com>2005-06-22 17:16:21 +0000
committerTrond Myklebust <Trond.Myklebust@netapp.com>2005-06-22 16:07:06 -0400
commit4ce79717ce32a9f88c1ddce4b9658556cb59d37a (patch)
tree7f0c5e4bdbc2ee15b8e902b951d1be200b35411f
parent9085bbcb76421a90bea28f4d3d03fa9977319c49 (diff)
[PATCH] NFS: Header file cleanup...
- Move NFSv4 state definitions into a private header file. - Clean up gunk in nfs_fs.h Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
-rw-r--r--fs/nfs/callback.c1
-rw-r--r--fs/nfs/callback_proc.c1
-rw-r--r--fs/nfs/callback_xdr.c1
-rw-r--r--fs/nfs/delegation.c1
-rw-r--r--fs/nfs/dir.c1
-rw-r--r--fs/nfs/idmap.c1
-rw-r--r--fs/nfs/inode.c1
-rw-r--r--fs/nfs/nfs4_fs.h250
-rw-r--r--fs/nfs/nfs4proc.c5
-rw-r--r--fs/nfs/nfs4renewd.c1
-rw-r--r--fs/nfs/nfs4state.c12
-rw-r--r--fs/nfs/nfs4xdr.c8
-rw-r--r--include/linux/nfs_fs.h241
13 files changed, 264 insertions, 260 deletions
diff --git a/fs/nfs/callback.c b/fs/nfs/callback.c
index 560d6175dd58..f2ca782aba33 100644
--- a/fs/nfs/callback.c
+++ b/fs/nfs/callback.c
@@ -14,6 +14,7 @@
#include <linux/sunrpc/svc.h>
#include <linux/sunrpc/svcsock.h>
#include <linux/nfs_fs.h>
+#include "nfs4_fs.h"
#include "callback.h"
#define NFSDBG_FACILITY NFSDBG_CALLBACK
diff --git a/fs/nfs/callback_proc.c b/fs/nfs/callback_proc.c
index ece27e42b93b..65f1e19e4d19 100644
--- a/fs/nfs/callback_proc.c
+++ b/fs/nfs/callback_proc.c
@@ -8,6 +8,7 @@
#include <linux/config.h>
#include <linux/nfs4.h>
#include <linux/nfs_fs.h>
+#include "nfs4_fs.h"
#include "callback.h"
#include "delegation.h"
diff --git a/fs/nfs/callback_xdr.c b/fs/nfs/callback_xdr.c
index d271df9df2b2..c99677ec58f8 100644
--- a/fs/nfs/callback_xdr.c
+++ b/fs/nfs/callback_xdr.c
@@ -10,6 +10,7 @@
#include <linux/sunrpc/svc.h>
#include <linux/nfs4.h>
#include <linux/nfs_fs.h>
+#include "nfs4_fs.h"
#include "callback.h"
#define CB_OP_TAGLEN_MAXSZ (512)
diff --git a/fs/nfs/delegation.c b/fs/nfs/delegation.c
index 5b9c60f97791..d7f7eb669d03 100644
--- a/fs/nfs/delegation.c
+++ b/fs/nfs/delegation.c
@@ -16,6 +16,7 @@
#include <linux/nfs_fs.h>
#include <linux/nfs_xdr.h>
+#include "nfs4_fs.h"
#include "delegation.h"
static struct nfs_delegation *nfs_alloc_delegation(void)
diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
index ff6155f5e8d9..9ccb15e86967 100644
--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c
@@ -32,6 +32,7 @@
#include <linux/smp_lock.h>
#include <linux/namei.h>
+#include "nfs4_fs.h"
#include "delegation.h"
#define NFS_PARANOIA 1
diff --git a/fs/nfs/idmap.c b/fs/nfs/idmap.c
index 87f4f9aeac86..ffb8df91dc34 100644
--- a/fs/nfs/idmap.c
+++ b/fs/nfs/idmap.c
@@ -50,6 +50,7 @@
#include <linux/nfs_fs.h>
#include <linux/nfs_idmap.h>
+#include "nfs4_fs.h"
#define IDMAP_HASH_SZ 128
diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c
index 32ddcf69e9ac..c80a81ff59c6 100644
--- a/fs/nfs/inode.c
+++ b/fs/nfs/inode.c
@@ -39,6 +39,7 @@
#include <asm/system.h>
#include <asm/uaccess.h>
+#include "nfs4_fs.h"
#include "delegation.h"
#define NFSDBG_FACILITY NFSDBG_VFS
diff --git a/fs/nfs/nfs4_fs.h b/fs/nfs/nfs4_fs.h
new file mode 100644
index 000000000000..85cf3bd36921
--- /dev/null
+++ b/fs/nfs/nfs4_fs.h
@@ -0,0 +1,250 @@
+/*
+ * 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 */
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 1d5cb3e80c3e..a69c02b206c1 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -48,6 +48,7 @@
#include <linux/smp_lock.h>
#include <linux/namei.h>
+#include "nfs4_fs.h"
#include "delegation.h"
#define NFSDBG_FACILITY NFSDBG_PROC
@@ -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 struct rpc_procinfo nfs4_procedures[];
-extern nfs4_stateid zero_stateid;
-
/* Prevent leaks of NFSv4 errors into userland */
int nfs4_map_errors(int err)
{
@@ -104,7 +103,7 @@ const u32 nfs4_statfs_bitmap[2] = {
| FATTR4_WORD1_SPACE_TOTAL
};
-u32 nfs4_pathconf_bitmap[2] = {
+const u32 nfs4_pathconf_bitmap[2] = {
FATTR4_WORD0_MAXLINK
| FATTR4_WORD0_MAXNAME,
0
diff --git a/fs/nfs/nfs4renewd.c b/fs/nfs/nfs4renewd.c
index 667e06f1c647..a3001628ad32 100644
--- a/fs/nfs/nfs4renewd.c
+++ b/fs/nfs/nfs4renewd.c
@@ -53,6 +53,7 @@
#include <linux/nfs.h>
#include <linux/nfs4.h>
#include <linux/nfs_fs.h>
+#include "nfs4_fs.h"
#define NFSDBG_FACILITY NFSDBG_PROC
diff --git a/fs/nfs/nfs4state.c b/fs/nfs/nfs4state.c
index 231cebce3c87..17b187f2d776 100644
--- a/fs/nfs/nfs4state.c
+++ b/fs/nfs/nfs4state.c
@@ -46,24 +46,18 @@
#include <linux/workqueue.h>
#include <linux/bitops.h>
+#include "nfs4_fs.h"
#include "callback.h"
#include "delegation.h"
#define OPENOWNER_POOL_SIZE 8
-static DEFINE_SPINLOCK(state_spinlock);
-
-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
+const nfs4_stateid zero_stateid;
+static DEFINE_SPINLOCK(state_spinlock);
static LIST_HEAD(nfs4_clientid_list);
static void nfs4_recover_state(void *);
-extern void nfs4_renew_state(void *);
void
init_nfsv4_state(struct nfs_server *server)
diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c
index 5f4de05763c9..e86406eff0eb 100644
--- a/fs/nfs/nfs4xdr.c
+++ b/fs/nfs/nfs4xdr.c
@@ -51,6 +51,7 @@
#include <linux/nfs4.h>
#include <linux/nfs_fs.h>
#include <linux/nfs_idmap.h>
+#include "nfs4_fs.h"
#define NFSDBG_FACILITY NFSDBG_XDR
@@ -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)
{
- extern u32 nfs4_fattr_bitmap[];
-
return encode_getattr_two(xdr,
bitmask[0] & nfs4_fattr_bitmap[0],
bitmask[1] & nfs4_fattr_bitmap[1]);
@@ -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)
{
- extern u32 nfs4_fsinfo_bitmap[];
-
return encode_getattr_two(xdr, bitmask[0] & nfs4_fsinfo_bitmap[0],
bitmask[1] & nfs4_fsinfo_bitmap[1]);
}
@@ -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)
{
- extern nfs4_stateid zero_stateid;
nfs4_stateid stateid;
uint32_t *p;
@@ -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)
{
- extern u32 nfs4_pathconf_bitmap[2];
struct xdr_stream xdr;
struct compound_hdr hdr = {
.nops = 2,
@@ -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)
{
- extern u32 nfs4_statfs_bitmap[];
struct xdr_stream xdr;
struct compound_hdr hdr = {
.nops = 2,
diff --git a/include/linux/nfs_fs.h b/include/linux/nfs_fs.h
index dbac7f363e5d..fb33e7655cfa 100644
--- a/include/linux/nfs_fs.h
+++ b/include/linux/nfs_fs.h
@@ -15,7 +15,6 @@
#include <linux/pagemap.h>
#include <linux/rwsem.h>
#include <linux/wait.h>
-#include <linux/uio.h>
#include <linux/nfs_fs_sb.h>
@@ -29,7 +28,6 @@
#include <linux/nfs4.h>
#include <linux/nfs_xdr.h>
#include <linux/rwsem.h>
-#include <linux/workqueue.h>
#include <linux/mempool.h>
/*
@@ -44,13 +42,6 @@
#define NFS_DEF_FILE_IO_BUFFER_SIZE 4096
/*
- * The upper limit on timeouts for the exponential backoff algorithm.
- */
-#define NFS_WRITEBACK_DELAY (5*HZ)
-#define NFS_WRITEBACK_LOCKDELAY (60*HZ)
-#define NFS_COMMIT_DELAY (5*HZ)
-
-/*
* superblock magic number for NFS
*/
#define NFS_SUPER_MAGIC 0x6969
@@ -60,9 +51,6 @@
*/
#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:
@@ -434,11 +422,6 @@ static inline void nfs_writedata_free(struct nfs_write_data *p)
mempool_free(p, nfs_wdata_mempool);
}
-/* Hack for future NFS swap support */
-#ifndef IS_SWAPFILE
-# define IS_SWAPFILE(inode) (0)
-#endif
-
/*
* linux/fs/nfs/read.c
*/
@@ -515,230 +498,6 @@ 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,
-};
-
-/*
- * 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__ */
/*