Merge branch 'master' of ssh://rsync.linux-nfs.org/home/trondmy/www_sites/rsync.linux-nfs.org/pub/linux/nfs-2.6

4 files changed, 34 insertions, 25 deletions

diff --git a/fs/nfs/nfs4_fs.h b/fs/nfs/nfs4_fs.h
index 8a3788199052..78a53f5a9f18 100644
--- a/fs/nfs/nfs4_fs.h
+++ b/fs/nfs/nfs4_fs.h
@@ -110,9 +110,8 @@ struct nfs_seqid_counter {
 };
 
 struct nfs_seqid {
-	struct list_head list;
 	struct nfs_seqid_counter *sequence;
-	struct rpc_task *task;
+	struct list_head list;
 };
 
 static inline void nfs_confirm_seqid(struct nfs_seqid_counter *seqid, int status)
@@ -127,6 +126,7 @@ static inline void nfs_confirm_seqid(struct nfs_seqid_counter *seqid, int status
  * semantics by allowing the server to identify replayed requests.
  */
 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 */
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index ff378126ccd7..9c1da34036aa 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -212,6 +212,7 @@ static void update_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid,
 
 	open_flags &= (FMODE_READ|FMODE_WRITE);
 	/* Protect against nfs4_find_state() */
+	spin_lock(&state->owner->so_lock);
 	spin_lock(&inode->i_lock);
 	state->state |= open_flags;
 	/* NB! List reordering - see the reclaim code for why.  */
@@ -221,6 +222,7 @@ static void update_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid,
 		state->nreaders++;
 	memcpy(&state->stateid, stateid, sizeof(state->stateid));
 	spin_unlock(&inode->i_lock);
+	spin_unlock(&state->owner->so_lock);
 }
 
 /*
@@ -2357,7 +2359,7 @@ static inline ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size
 			return -ENOMEM;
 		args.acl_pages[0] = localpage;
 		args.acl_pgbase = 0;
-		args.acl_len = PAGE_SIZE;
+		resp_len = args.acl_len = PAGE_SIZE;
 	} else {
 		resp_buf = buf;
 		buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
diff --git a/fs/nfs/nfs4state.c b/fs/nfs/nfs4state.c
index 23834c8fb740..2d5a6a2b9dec 100644
--- a/fs/nfs/nfs4state.c
+++ b/fs/nfs/nfs4state.c
@@ -267,6 +267,7 @@ nfs4_alloc_state_owner(void)
 	sp = kzalloc(sizeof(*sp),GFP_KERNEL);
 	if (!sp)
 		return NULL;
+	spin_lock_init(&sp->so_lock);
 	INIT_LIST_HEAD(&sp->so_states);
 	INIT_LIST_HEAD(&sp->so_delegations);
 	rpc_init_wait_queue(&sp->so_sequence.wait, "Seqid_waitqueue");
@@ -438,20 +439,23 @@ nfs4_get_open_state(struct inode *inode, struct nfs4_state_owner *owner)
 	if (state)
 		goto out;
 	new = nfs4_alloc_open_state();
+	spin_lock(&owner->so_lock);
 	spin_lock(&inode->i_lock);
 	state = __nfs4_find_state_byowner(inode, owner);
 	if (state == NULL && new != NULL) {
 		state = new;
-		/* Note: The reclaim code dictates that we add stateless
-		 * and read-only stateids to the end of the list */
-		list_add_tail(&state->open_states, &owner->so_states);
 		state->owner = owner;
 		atomic_inc(&owner->so_count);
 		list_add(&state->inode_states, &nfsi->open_states);
 		state->inode = igrab(inode);
 		spin_unlock(&inode->i_lock);
+		/* Note: The reclaim code dictates that we add stateless
+		 * and read-only stateids to the end of the list */
+		list_add_tail(&state->open_states, &owner->so_states);
+		spin_unlock(&owner->so_lock);
 	} else {
 		spin_unlock(&inode->i_lock);
+		spin_unlock(&owner->so_lock);
 		if (new)
 			nfs4_free_open_state(new);
 	}
@@ -468,12 +472,14 @@ void nfs4_put_open_state(struct nfs4_state *state)
 	struct inode *inode = state->inode;
 	struct nfs4_state_owner *owner = state->owner;
 
-	if (!atomic_dec_and_lock(&state->count, &inode->i_lock))
+	if (!atomic_dec_and_lock(&state->count, &owner->so_lock))
 		return;
+	spin_lock(&inode->i_lock);
 	if (!list_empty(&state->inode_states))
 		list_del(&state->inode_states);
-	spin_unlock(&inode->i_lock);
 	list_del(&state->open_states);
+	spin_unlock(&inode->i_lock);
+	spin_unlock(&owner->so_lock);
 	iput(inode);
 	BUG_ON (state->state != 0);
 	nfs4_free_open_state(state);
@@ -491,6 +497,7 @@ void nfs4_close_state(struct nfs4_state *state, mode_t mode)
 
 	atomic_inc(&owner->so_count);
 	/* Protect against nfs4_find_state() */
+	spin_lock(&owner->so_lock);
 	spin_lock(&inode->i_lock);
 	if (mode & FMODE_READ)
 		state->nreaders--;
@@ -503,6 +510,7 @@ void nfs4_close_state(struct nfs4_state *state, mode_t mode)
 		list_move_tail(&state->open_states, &owner->so_states);
 	}
 	spin_unlock(&inode->i_lock);
+	spin_unlock(&owner->so_lock);
 	newstate = 0;
 	if (state->state != 0) {
 		if (state->nreaders)
@@ -670,16 +678,12 @@ void nfs4_copy_stateid(nfs4_stateid *dst, struct nfs4_state *state, fl_owner_t f
 
 struct nfs_seqid *nfs_alloc_seqid(struct nfs_seqid_counter *counter)
 {
-	struct rpc_sequence *sequence = counter->sequence;
 	struct nfs_seqid *new;
 
 	new = kmalloc(sizeof(*new), GFP_KERNEL);
 	if (new != NULL) {
 		new->sequence = counter;
-		new->task = NULL;
-		spin_lock(&sequence->lock);
-		list_add_tail(&new->list, &sequence->list);
-		spin_unlock(&sequence->lock);
+		INIT_LIST_HEAD(&new->list);
 	}
 	return new;
 }
@@ -687,16 +691,13 @@ struct nfs_seqid *nfs_alloc_seqid(struct nfs_seqid_counter *counter)
 void nfs_free_seqid(struct nfs_seqid *seqid)
 {
 	struct rpc_sequence *sequence = seqid->sequence->sequence;
-	struct rpc_task *next = NULL;
 
-	spin_lock(&sequence->lock);
-	list_del(&seqid->list);
-	if (!list_empty(&sequence->list)) {
-		next = list_entry(sequence->list.next, struct nfs_seqid, list)->task;
-		if (next)
-			rpc_wake_up_task(next);
+	if (!list_empty(&seqid->list)) {
+		spin_lock(&sequence->lock);
+		list_del(&seqid->list);
+		spin_unlock(&sequence->lock);
 	}
-	spin_unlock(&sequence->lock);
+	rpc_wake_up_next(&sequence->wait);
 	kfree(seqid);
 }
 
@@ -752,13 +753,16 @@ int nfs_wait_on_sequence(struct nfs_seqid *seqid, struct rpc_task *task)
 	struct rpc_sequence *sequence = seqid->sequence->sequence;
 	int status = 0;
 
+	if (sequence->list.next == &seqid->list)
+		goto out;
 	spin_lock(&sequence->lock);
-	if (sequence->list.next != &seqid->list) {
-		seqid->task = task;
+	if (!list_empty(&sequence->list)) {
 		rpc_sleep_on(&sequence->wait, task, NULL, NULL);
 		status = -EAGAIN;
-	}
+	} else
+		list_add(&seqid->list, &sequence->list);
 	spin_unlock(&sequence->lock);
+out:
 	return status;
 }
 
@@ -903,6 +907,7 @@ static void nfs4_state_mark_reclaim(struct nfs4_client *clp)
 	list_for_each_entry(sp, &clp->cl_state_owners, so_list) {
 		sp->so_seqid.counter = 0;
 		sp->so_seqid.flags = 0;
+		spin_lock(&sp->so_lock);
 		list_for_each_entry(state, &sp->so_states, open_states) {
 			list_for_each_entry(lock, &state->lock_states, ls_locks) {
 				lock->ls_seqid.counter = 0;
@@ -910,6 +915,7 @@ static void nfs4_state_mark_reclaim(struct nfs4_client *clp)
 				lock->ls_flags &= ~NFS_LOCK_INITIALIZED;
 			}
 		}
+		spin_unlock(&sp->so_lock);
 	}
 }
 
diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c
index c5c75235c5b8..cd762648fa9a 100644
--- a/fs/nfs/nfs4xdr.c
+++ b/fs/nfs/nfs4xdr.c
@@ -3255,7 +3255,8 @@ static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
 		if (attrlen <= *acl_len)
 			xdr_read_pages(xdr, attrlen);
 		*acl_len = attrlen;
-	}
+	} else
+		status = -EOPNOTSUPP;
 
 out:
 	return status;