Merge ../linux-2.6 by hand

[powerpc.git] / fs / nfs / nfs4_fs.h

diff --git a/fs/nfs/nfs4_fs.h b/fs/nfs/nfs4_fs.h
index ec1a22d..78a53f5 100644 (file)
--- a/fs/nfs/nfs4_fs.h
+++ b/fs/nfs/nfs4_fs.h
@@ -92,26 +92,51 @@ struct nfs4_client {
        unsigned char           cl_id_uniquifier;
 };
 
+/*
+ * struct rpc_sequence ensures that RPC calls are sent in the exact
+ * order that they appear on the list.
+ */
+struct rpc_sequence {
+       struct rpc_wait_queue   wait;   /* RPC call delay queue */
+       spinlock_t lock;                /* Protects the list */
+       struct list_head list;          /* Defines sequence of RPC calls */
+};
+
+#define NFS_SEQID_CONFIRMED 1
+struct nfs_seqid_counter {
+       struct rpc_sequence *sequence;
+       int flags;
+       u32 counter;
+};
+
+struct nfs_seqid {
+       struct nfs_seqid_counter *sequence;
+       struct list_head list;
+};
+
+static inline void nfs_confirm_seqid(struct nfs_seqid_counter *seqid, int status)
+{
+       if (seqid_mutating_err(-status))
+               seqid->flags |= NFS_SEQID_CONFIRMED;
+}
+
 /*
  * 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 {
+       spinlock_t           so_lock;
        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 nfs_seqid_counter so_seqid;
+       struct rpc_sequence  so_sequence;
 };
 
 /*
@@ -132,7 +157,7 @@ struct nfs4_lock_state {
        fl_owner_t              ls_owner;       /* POSIX lock owner */
 #define NFS_LOCK_INITIALIZED 1
        int                     ls_flags;
-       u32                     ls_seqid;
+       struct nfs_seqid_counter        ls_seqid;
        u32                     ls_id;
        nfs4_stateid            ls_stateid;
        atomic_t                ls_count;
@@ -153,7 +178,6 @@ struct nfs4_state {
        struct inode *inode;            /* Pointer to the inode */
 
        unsigned long flags;            /* Do we hold any locks? */
-       struct semaphore lock_sema;     /* Serializes file locking operations */
        spinlock_t state_lock;          /* Protects the lock_states list */
 
        nfs4_stateid stateid;
@@ -191,8 +215,8 @@ 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 dentry *nfs4_atomic_open(struct inode *, struct dentry *, struct nameidata *);
+extern int nfs4_open_revalidate(struct inode *, struct dentry *, int, struct nameidata *);
 
 extern struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops;
 extern struct nfs4_state_recovery_ops nfs4_network_partition_recovery_ops;
@@ -224,12 +248,17 @@ extern struct nfs4_state * nfs4_get_open_state(struct inode *, struct nfs4_state
 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 void nfs4_put_lock_state(struct nfs4_lock_state *lsp);
 extern int nfs4_set_lock_state(struct nfs4_state *state, struct file_lock *fl);
-extern void nfs4_increment_lock_seqid(int status, struct nfs4_lock_state *ls);
 extern void nfs4_copy_stateid(nfs4_stateid *, struct nfs4_state *, fl_owner_t);
 
+extern struct nfs_seqid *nfs_alloc_seqid(struct nfs_seqid_counter *counter);
+extern int nfs_wait_on_sequence(struct nfs_seqid *seqid, struct rpc_task *task);
+extern void nfs_increment_open_seqid(int status, struct nfs_seqid *seqid);
+extern void nfs_increment_lock_seqid(int status, struct nfs_seqid *seqid);
+extern void nfs_free_seqid(struct nfs_seqid *seqid);
+
 extern const nfs4_stateid zero_stateid;
 
 /* nfs4xdr.c */