Merge tag 'v3.6-rc7' into next

Linux 3.6-rc7

Requested by David Howells so he can merge his key susbsystem work into
my tree with requisite -linus changesets.

106 files changed, 1123 insertions, 834 deletions

diff --git a/fs/autofs4/expire.c b/fs/autofs4/expire.c
index 8c0e56d9293..842d00048a6 100644
--- a/fs/autofs4/expire.c
+++ b/fs/autofs4/expire.c
@@ -399,11 +399,6 @@ struct dentry *autofs4_expire_indirect(struct super_block *sb,
 			DPRINTK("checking mountpoint %p %.*s",
 				dentry, (int)dentry->d_name.len, dentry->d_name.name);
 
-			/* Path walk currently on this dentry? */
-			ino_count = atomic_read(&ino->count) + 2;
-			if (dentry->d_count > ino_count)
-				goto next;
-
 			/* Can we umount this guy */
 			if (autofs4_mount_busy(mnt, dentry))
 				goto next;
diff --git a/fs/bio.c b/fs/bio.c
index 5eaa70c9d96..71072ab9912 100644
--- a/fs/bio.c
+++ b/fs/bio.c
@@ -73,7 +73,7 @@ static struct kmem_cache *bio_find_or_create_slab(unsigned int extra_size)
 {
 	unsigned int sz = sizeof(struct bio) + extra_size;
 	struct kmem_cache *slab = NULL;
-	struct bio_slab *bslab;
+	struct bio_slab *bslab, *new_bio_slabs;
 	unsigned int i, entry = -1;
 
 	mutex_lock(&bio_slab_lock);
@@ -97,11 +97,12 @@ static struct kmem_cache *bio_find_or_create_slab(unsigned int extra_size)
 
 	if (bio_slab_nr == bio_slab_max && entry == -1) {
 		bio_slab_max <<= 1;
-		bio_slabs = krealloc(bio_slabs,
-				     bio_slab_max * sizeof(struct bio_slab),
-				     GFP_KERNEL);
-		if (!bio_slabs)
+		new_bio_slabs = krealloc(bio_slabs,
+					 bio_slab_max * sizeof(struct bio_slab),
+					 GFP_KERNEL);
+		if (!new_bio_slabs)
 			goto out_unlock;
+		bio_slabs = new_bio_slabs;
 	}
 	if (entry == -1)
 		entry = bio_slab_nr++;
diff --git a/fs/block_dev.c b/fs/block_dev.c
index 1e519195d45..38e721b35d4 100644
--- a/fs/block_dev.c
+++ b/fs/block_dev.c
@@ -1578,10 +1578,12 @@ ssize_t blkdev_aio_write(struct kiocb *iocb, const struct iovec *iov,
 			 unsigned long nr_segs, loff_t pos)
 {
 	struct file *file = iocb->ki_filp;
+	struct blk_plug plug;
 	ssize_t ret;
 
 	BUG_ON(iocb->ki_pos != pos);
 
+	blk_start_plug(&plug);
 	ret = __generic_file_aio_write(iocb, iov, nr_segs, &iocb->ki_pos);
 	if (ret > 0 || ret == -EIOCBQUEUED) {
 		ssize_t err;
@@ -1590,6 +1592,7 @@ ssize_t blkdev_aio_write(struct kiocb *iocb, const struct iovec *iov,
 		if (err < 0 && ret > 0)
 			ret = err;
 	}
+	blk_finish_plug(&plug);
 	return ret;
 }
 EXPORT_SYMBOL_GPL(blkdev_aio_write);
diff --git a/fs/btrfs/backref.c b/fs/btrfs/backref.c
index a256f3b2a84..ff6475f409d 100644
--- a/fs/btrfs/backref.c
+++ b/fs/btrfs/backref.c
@@ -1438,10 +1438,10 @@ int iterate_inodes_from_logical(u64 logical, struct btrfs_fs_info *fs_info,
 	ret = extent_from_logical(fs_info, logical, path,
 					&found_key);
 	btrfs_release_path(path);
-	if (ret & BTRFS_EXTENT_FLAG_TREE_BLOCK)
-		ret = -EINVAL;
 	if (ret < 0)
 		return ret;
+	if (ret & BTRFS_EXTENT_FLAG_TREE_BLOCK)
+		return -EINVAL;
 
 	extent_item_pos = logical - found_key.objectid;
 	ret = iterate_extent_inodes(fs_info, found_key.objectid,
diff --git a/fs/btrfs/compression.c b/fs/btrfs/compression.c
index 86eff48dab7..43d1c5a3a03 100644
--- a/fs/btrfs/compression.c
+++ b/fs/btrfs/compression.c
@@ -818,6 +818,7 @@ static void free_workspace(int type, struct list_head *workspace)
 	btrfs_compress_op[idx]->free_workspace(workspace);
 	atomic_dec(alloc_workspace);
 wake:
+	smp_mb();
 	if (waitqueue_active(workspace_wait))
 		wake_up(workspace_wait);
 }
diff --git a/fs/btrfs/ctree.c b/fs/btrfs/ctree.c
index 9d7621f271f..6d183f60d63 100644
--- a/fs/btrfs/ctree.c
+++ b/fs/btrfs/ctree.c
@@ -421,12 +421,6 @@ void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info,
 	spin_unlock(&fs_info->tree_mod_seq_lock);
 
 	/*
-	 * we removed the lowest blocker from the blocker list, so there may be
-	 * more processible delayed refs.
-	 */
-	wake_up(&fs_info->tree_mod_seq_wait);
-
-	/*
 	 * anything that's lower than the lowest existing (read: blocked)
 	 * sequence number can be removed from the tree.
 	 */
@@ -631,6 +625,9 @@ __tree_mod_log_free_eb(struct btrfs_fs_info *fs_info, struct extent_buffer *eb)
 	u32 nritems;
 	int ret;
 
+	if (btrfs_header_level(eb) == 0)
+		return;
+
 	nritems = btrfs_header_nritems(eb);
 	for (i = nritems - 1; i >= 0; i--) {
 		ret = tree_mod_log_insert_key_locked(fs_info, eb, i,
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index 4bab807227a..0d195b50766 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -1252,7 +1252,6 @@ struct btrfs_fs_info {
 	atomic_t tree_mod_seq;
 	struct list_head tree_mod_seq_list;
 	struct seq_list tree_mod_seq_elem;
-	wait_queue_head_t tree_mod_seq_wait;
 
 	/* this protects tree_mod_log */
 	rwlock_t tree_mod_log_lock;
@@ -3192,7 +3191,7 @@ int btrfs_del_csums(struct btrfs_trans_handle *trans,
 int btrfs_lookup_bio_sums(struct btrfs_root *root, struct inode *inode,
 			  struct bio *bio, u32 *dst);
 int btrfs_lookup_bio_sums_dio(struct btrfs_root *root, struct inode *inode,
-			      struct bio *bio, u64 logical_offset, u32 *dst);
+			      struct bio *bio, u64 logical_offset);
 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
 			     struct btrfs_root *root,
 			     u64 objectid, u64 pos,
diff --git a/fs/btrfs/delayed-inode.c b/fs/btrfs/delayed-inode.c
index 335605c8cea..07d5eeb1e6f 100644
--- a/fs/btrfs/delayed-inode.c
+++ b/fs/btrfs/delayed-inode.c
@@ -512,8 +512,8 @@ static void __btrfs_remove_delayed_item(struct btrfs_delayed_item *delayed_item)
 
 	rb_erase(&delayed_item->rb_node, root);
 	delayed_item->delayed_node->count--;
-	atomic_dec(&delayed_root->items);
-	if (atomic_read(&delayed_root->items) < BTRFS_DELAYED_BACKGROUND &&
+	if (atomic_dec_return(&delayed_root->items) <
+	    BTRFS_DELAYED_BACKGROUND &&
 	    waitqueue_active(&delayed_root->wait))
 		wake_up(&delayed_root->wait);
 }
@@ -1028,9 +1028,10 @@ do_again:
 		btrfs_release_delayed_item(prev);
 		ret = 0;
 		btrfs_release_path(path);
-		if (curr)
+		if (curr) {
+			mutex_unlock(&node->mutex);
 			goto do_again;
-		else
+		} else
 			goto delete_fail;
 	}
 
@@ -1055,8 +1056,7 @@ static void btrfs_release_delayed_inode(struct btrfs_delayed_node *delayed_node)
 		delayed_node->count--;
 
 		delayed_root = delayed_node->root->fs_info->delayed_root;
-		atomic_dec(&delayed_root->items);
-		if (atomic_read(&delayed_root->items) <
+		if (atomic_dec_return(&delayed_root->items) <
 		    BTRFS_DELAYED_BACKGROUND &&
 		    waitqueue_active(&delayed_root->wait))
 			wake_up(&delayed_root->wait);
diff --git a/fs/btrfs/delayed-ref.c b/fs/btrfs/delayed-ref.c
index da7419ed01b..ae941177339 100644
--- a/fs/btrfs/delayed-ref.c
+++ b/fs/btrfs/delayed-ref.c
@@ -38,17 +38,14 @@
 static int comp_tree_refs(struct btrfs_delayed_tree_ref *ref2,
 			  struct btrfs_delayed_tree_ref *ref1)
 {
-	if (ref1->node.type == BTRFS_TREE_BLOCK_REF_KEY) {
-		if (ref1->root < ref2->root)
-			return -1;
-		if (ref1->root > ref2->root)
-			return 1;
-	} else {
-		if (ref1->parent < ref2->parent)
-			return -1;
-		if (ref1->parent > ref2->parent)
-			return 1;
-	}
+	if (ref1->root < ref2->root)
+		return -1;
+	if (ref1->root > ref2->root)
+		return 1;
+	if (ref1->parent < ref2->parent)
+		return -1;
+	if (ref1->parent > ref2->parent)
+		return 1;
 	return 0;
 }
 
@@ -85,7 +82,8 @@ static int comp_data_refs(struct btrfs_delayed_data_ref *ref2,
  * type of the delayed backrefs and content of delayed backrefs.
  */
 static int comp_entry(struct btrfs_delayed_ref_node *ref2,
-		      struct btrfs_delayed_ref_node *ref1)
+		      struct btrfs_delayed_ref_node *ref1,
+		      bool compare_seq)
 {
 	if (ref1->bytenr < ref2->bytenr)
 		return -1;
@@ -102,10 +100,12 @@ static int comp_entry(struct btrfs_delayed_ref_node *ref2,
 	if (ref1->type > ref2->type)
 		return 1;
 	/* merging of sequenced refs is not allowed */
-	if (ref1->seq < ref2->seq)
-		return -1;
-	if (ref1->seq > ref2->seq)
-		return 1;
+	if (compare_seq) {
+		if (ref1->seq < ref2->seq)
+			return -1;
+		if (ref1->seq > ref2->seq)
+			return 1;
+	}
 	if (ref1->type == BTRFS_TREE_BLOCK_REF_KEY ||
 	    ref1->type == BTRFS_SHARED_BLOCK_REF_KEY) {
 		return comp_tree_refs(btrfs_delayed_node_to_tree_ref(ref2),
@@ -139,7 +139,7 @@ static struct btrfs_delayed_ref_node *tree_insert(struct rb_root *root,
 		entry = rb_entry(parent_node, struct btrfs_delayed_ref_node,
 				 rb_node);
 
-		cmp = comp_entry(entry, ins);
+		cmp = comp_entry(entry, ins, 1);
 		if (cmp < 0)
 			p = &(*p)->rb_left;
 		else if (cmp > 0)
@@ -233,6 +233,114 @@ int btrfs_delayed_ref_lock(struct btrfs_trans_handle *trans,
 	return 0;
 }
 
+static void inline drop_delayed_ref(struct btrfs_trans_handle *trans,
+				    struct btrfs_delayed_ref_root *delayed_refs,
+				    struct btrfs_delayed_ref_node *ref)
+{
+	rb_erase(&ref->rb_node, &delayed_refs->root);
+	ref->in_tree = 0;
+	btrfs_put_delayed_ref(ref);
+	delayed_refs->num_entries--;
+	if (trans->delayed_ref_updates)
+		trans->delayed_ref_updates--;
+}
+
+static int merge_ref(struct btrfs_trans_handle *trans,
+		     struct btrfs_delayed_ref_root *delayed_refs,
+		     struct btrfs_delayed_ref_node *ref, u64 seq)
+{
+	struct rb_node *node;
+	int merged = 0;
+	int mod = 0;
+	int done = 0;
+
+	node = rb_prev(&ref->rb_node);
+	while (node) {
+		struct btrfs_delayed_ref_node *next;
+
+		next = rb_entry(node, struct btrfs_delayed_ref_node, rb_node);
+		node = rb_prev(node);
+		if (next->bytenr != ref->bytenr)
+			break;
+		if (seq && next->seq >= seq)
+			break;
+		if (comp_entry(ref, next, 0))
+			continue;
+
+		if (ref->action == next->action) {
+			mod = next->ref_mod;
+		} else {
+			if (ref->ref_mod < next->ref_mod) {
+				struct btrfs_delayed_ref_node *tmp;
+
+				tmp = ref;
+				ref = next;
+				next = tmp;
+				done = 1;
+			}
+			mod = -next->ref_mod;
+		}
+
+		merged++;
+		drop_delayed_ref(trans, delayed_refs, next);
+		ref->ref_mod += mod;
+		if (ref->ref_mod == 0) {
+			drop_delayed_ref(trans, delayed_refs, ref);
+			break;
+		} else {
+			/*
+			 * You can't have multiples of the same ref on a tree
+			 * block.
+			 */
+			WARN_ON(ref->type == BTRFS_TREE_BLOCK_REF_KEY ||
+				ref->type == BTRFS_SHARED_BLOCK_REF_KEY);
+		}
+
+		if (done)
+			break;
+		node = rb_prev(&ref->rb_node);
+	}
+
+	return merged;
+}
+
+void btrfs_merge_delayed_refs(struct btrfs_trans_handle *trans,
+			      struct btrfs_fs_info *fs_info,
+			      struct btrfs_delayed_ref_root *delayed_refs,
+			      struct btrfs_delayed_ref_head *head)
+{
+	struct rb_node *node;
+	u64 seq = 0;
+
+	spin_lock(&fs_info->tree_mod_seq_lock);
+	if (!list_empty(&fs_info->tree_mod_seq_list)) {
+		struct seq_list *elem;
+
+		elem = list_first_entry(&fs_info->tree_mod_seq_list,
+					struct seq_list, list);
+		seq = elem->seq;
+	}
+	spin_unlock(&fs_info->tree_mod_seq_lock);
+
+	node = rb_prev(&head->node.rb_node);
+	while (node) {
+		struct btrfs_delayed_ref_node *ref;
+
+		ref = rb_entry(node, struct btrfs_delayed_ref_node,
+			       rb_node);
+		if (ref->bytenr != head->node.bytenr)
+			break;
+
+		/* We can't merge refs that are outside of our seq count */
+		if (seq && ref->seq >= seq)
+			break;
+		if (merge_ref(trans, delayed_refs, ref, seq))
+			node = rb_prev(&head->node.rb_node);
+		else
+			node = rb_prev(node);
+	}
+}
+
 int btrfs_check_delayed_seq(struct btrfs_fs_info *fs_info,
 			    struct btrfs_delayed_ref_root *delayed_refs,
 			    u64 seq)
@@ -336,18 +444,11 @@ update_existing_ref(struct btrfs_trans_handle *trans,
 		 * every changing the extent allocation tree.
 		 */
 		existing->ref_mod--;
-		if (existing->ref_mod == 0) {
-			rb_erase(&existing->rb_node,
-				 &delayed_refs->root);
-			existing->in_tree = 0;
-			btrfs_put_delayed_ref(existing);
-			delayed_refs->num_entries--;
-			if (trans->delayed_ref_updates)
-				trans->delayed_ref_updates--;
-		} else {
+		if (existing->ref_mod == 0)
+			drop_delayed_ref(trans, delayed_refs, existing);
+		else
 			WARN_ON(existing->type == BTRFS_TREE_BLOCK_REF_KEY ||
 				existing->type == BTRFS_SHARED_BLOCK_REF_KEY);
-		}
 	} else {
 		WARN_ON(existing->type == BTRFS_TREE_BLOCK_REF_KEY ||
 			existing->type == BTRFS_SHARED_BLOCK_REF_KEY);
@@ -662,9 +763,6 @@ int btrfs_add_delayed_tree_ref(struct btrfs_fs_info *fs_info,
 	add_delayed_tree_ref(fs_info, trans, &ref->node, bytenr,
 				   num_bytes, parent, ref_root, level, action,
 				   for_cow);
-	if (!need_ref_seq(for_cow, ref_root) &&
-	    waitqueue_active(&fs_info->tree_mod_seq_wait))
-		wake_up(&fs_info->tree_mod_seq_wait);
 	spin_unlock(&delayed_refs->lock);
 	if (need_ref_seq(for_cow, ref_root))
 		btrfs_qgroup_record_ref(trans, &ref->node, extent_op);
@@ -713,9 +811,6 @@ int btrfs_add_delayed_data_ref(struct btrfs_fs_info *fs_info,
 	add_delayed_data_ref(fs_info, trans, &ref->node, bytenr,
 				   num_bytes, parent, ref_root, owner, offset,
 				   action, for_cow);
-	if (!need_ref_seq(for_cow, ref_root) &&
-	    waitqueue_active(&fs_info->tree_mod_seq_wait))
-		wake_up(&fs_info->tree_mod_seq_wait);
 	spin_unlock(&delayed_refs->lock);
 	if (need_ref_seq(for_cow, ref_root))
 		btrfs_qgroup_record_ref(trans, &ref->node, extent_op);
@@ -744,8 +839,6 @@ int btrfs_add_delayed_extent_op(struct btrfs_fs_info *fs_info,
 				   num_bytes, BTRFS_UPDATE_DELAYED_HEAD,
 				   extent_op->is_data);
 
-	if (waitqueue_active(&fs_info->tree_mod_seq_wait))
-		wake_up(&fs_info->tree_mod_seq_wait);
 	spin_unlock(&delayed_refs->lock);
 	return 0;
 }
diff --git a/fs/btrfs/delayed-ref.h b/fs/btrfs/delayed-ref.h
index 0d7c90c366b..ab530059584 100644
--- a/fs/btrfs/delayed-ref.h
+++ b/fs/btrfs/delayed-ref.h
@@ -167,6 +167,10 @@ int btrfs_add_delayed_extent_op(struct btrfs_fs_info *fs_info,
 				struct btrfs_trans_handle *trans,
 				u64 bytenr, u64 num_bytes,
 				struct btrfs_delayed_extent_op *extent_op);
+void btrfs_merge_delayed_refs(struct btrfs_trans_handle *trans,
+			      struct btrfs_fs_info *fs_info,
+			      struct btrfs_delayed_ref_root *delayed_refs,
+			      struct btrfs_delayed_ref_head *head);
 
 struct btrfs_delayed_ref_head *
 btrfs_find_delayed_ref_head(struct btrfs_trans_handle *trans, u64 bytenr);
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 62e0cafd6e2..22e98e04c2e 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -377,9 +377,13 @@ static int btree_read_extent_buffer_pages(struct btrfs_root *root,
 		ret = read_extent_buffer_pages(io_tree, eb, start,
 					       WAIT_COMPLETE,
 					       btree_get_extent, mirror_num);
-		if (!ret && !verify_parent_transid(io_tree, eb,
+		if (!ret) {
+			if (!verify_parent_transid(io_tree, eb,
 						   parent_transid, 0))
-			break;
+				break;
+			else
+				ret = -EIO;
+		}
 
 		/*
 		 * This buffer's crc is fine, but its contents are corrupted, so
@@ -754,9 +758,7 @@ static void run_one_async_done(struct btrfs_work *work)
 	limit = btrfs_async_submit_limit(fs_info);
 	limit = limit * 2 / 3;
 
-	atomic_dec(&fs_info->nr_async_submits);
-
-	if (atomic_read(&fs_info->nr_async_submits) < limit &&
+	if (atomic_dec_return(&fs_info->nr_async_submits) < limit &&
 	    waitqueue_active(&fs_info->async_submit_wait))
 		wake_up(&fs_info->async_submit_wait);
 
@@ -2032,8 +2034,6 @@ int open_ctree(struct super_block *sb,
 	fs_info->free_chunk_space = 0;
 	fs_info->tree_mod_log = RB_ROOT;
 
-	init_waitqueue_head(&fs_info->tree_mod_seq_wait);
-
 	/* readahead state */
 	INIT_RADIX_TREE(&fs_info->reada_tree, GFP_NOFS & ~__GFP_WAIT);
 	spin_lock_init(&fs_info->reada_lock);
@@ -2528,8 +2528,7 @@ retry_root_backup:
 		goto fail_trans_kthread;
 
 	/* do not make disk changes in broken FS */
-	if (btrfs_super_log_root(disk_super) != 0 &&
-	    !(fs_info->fs_state & BTRFS_SUPER_FLAG_ERROR)) {
+	if (btrfs_super_log_root(disk_super) != 0) {
 		u64 bytenr = btrfs_super_log_root(disk_super);
 
 		if (fs_devices->rw_devices == 0) {
@@ -3189,30 +3188,14 @@ int close_ctree(struct btrfs_root *root)
 	/* clear out the rbtree of defraggable inodes */
 	btrfs_run_defrag_inodes(fs_info);
 
-	/*
-	 * Here come 2 situations when btrfs is broken to flip readonly:
-	 *
-	 * 1. when btrfs flips readonly somewhere else before
-	 * btrfs_commit_super, sb->s_flags has MS_RDONLY flag,
-	 * and btrfs will skip to write sb directly to keep
-	 * ERROR state on disk.
-	 *
-	 * 2. when btrfs flips readonly just in btrfs_commit_super,
-	 * and in such case, btrfs cannot write sb via btrfs_commit_super,
-	 * and since fs_state has been set BTRFS_SUPER_FLAG_ERROR flag,
-	 * btrfs will cleanup all FS resources first and write sb then.
-	 */
 	if (!(fs_info->sb->s_flags & MS_RDONLY)) {
 		ret = btrfs_commit_super(root);
 		if (ret)
 			printk(KERN_ERR "btrfs: commit super ret %d\n", ret);
 	}
 
-	if (fs_info->fs_state & BTRFS_SUPER_FLAG_ERROR) {
-		ret = btrfs_error_commit_super(root);
-		if (ret)
-			printk(KERN_ERR "btrfs: commit super ret %d\n", ret);
-	}
+	if (fs_info->fs_state & BTRFS_SUPER_FLAG_ERROR)
+		btrfs_error_commit_super(root);
 
 	btrfs_put_block_group_cache(fs_info);
 
@@ -3434,18 +3417,11 @@ static int btrfs_check_super_valid(struct btrfs_fs_info *fs_info,
 	if (read_only)
 		return 0;
 
-	if (fs_info->fs_state & BTRFS_SUPER_FLAG_ERROR) {
-		printk(KERN_WARNING "warning: mount fs with errors, "
-		       "running btrfsck is recommended\n");
-	}
-
 	return 0;
 }
 
-int btrfs_error_commit_super(struct btrfs_root *root)
+void btrfs_error_commit_super(struct btrfs_root *root)
 {
-	int ret;
-
 	mutex_lock(&root->fs_info->cleaner_mutex);
 	btrfs_run_delayed_iputs(root);
 	mutex_unlock(&root->fs_info->cleaner_mutex);
@@ -3455,10 +3431,6 @@ int btrfs_error_commit_super(struct btrfs_root *root)
 
 	/* cleanup FS via transaction */
 	btrfs_cleanup_transaction(root);
-
-	ret = write_ctree_super(NULL, root, 0);
-
-	return ret;
 }
 
 static void btrfs_destroy_ordered_operations(struct btrfs_root *root)
@@ -3782,14 +3754,17 @@ int btrfs_cleanup_transaction(struct btrfs_root *root)
 		/* FIXME: cleanup wait for commit */
 		t->in_commit = 1;
 		t->blocked = 1;
+		smp_mb();
 		if (waitqueue_active(&root->fs_info->transaction_blocked_wait))
 			wake_up(&root->fs_info->transaction_blocked_wait);
 
 		t->blocked = 0;
+		smp_mb();
 		if (waitqueue_active(&root->fs_info->transaction_wait))
 			wake_up(&root->fs_info->transaction_wait);
 
 		t->commit_done = 1;
+		smp_mb();
 		if (waitqueue_active(&t->commit_wait))
 			wake_up(&t->commit_wait);
 
diff --git a/fs/btrfs/disk-io.h b/fs/btrfs/disk-io.h
index 95e147eea23..c5b00a735fe 100644
--- a/fs/btrfs/disk-io.h
+++ b/fs/btrfs/disk-io.h
@@ -54,7 +54,7 @@ int write_ctree_super(struct btrfs_trans_handle *trans,
 		      struct btrfs_root *root, int max_mirrors);
 struct buffer_head *btrfs_read_dev_super(struct block_device *bdev);
 int btrfs_commit_super(struct btrfs_root *root);
-int btrfs_error_commit_super(struct btrfs_root *root);
+void btrfs_error_commit_super(struct btrfs_root *root);
 struct extent_buffer *btrfs_find_tree_block(struct btrfs_root *root,
 					    u64 bytenr, u32 blocksize);
 struct btrfs_root *btrfs_read_fs_root_no_radix(struct btrfs_root *tree_root,
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index 4e1b153b7c4..ba58024d40d 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -2252,6 +2252,16 @@ static noinline int run_clustered_refs(struct btrfs_trans_handle *trans,
 		}
 
 		/*
+		 * We need to try and merge add/drops of the same ref since we
+		 * can run into issues with relocate dropping the implicit ref
+		 * and then it being added back again before the drop can
+		 * finish.  If we merged anything we need to re-loop so we can
+		 * get a good ref.
+		 */
+		btrfs_merge_delayed_refs(trans, fs_info, delayed_refs,
+					 locked_ref);
+
+		/*
 		 * locked_ref is the head node, so we have to go one
 		 * node back for any delayed ref updates
 		 */
@@ -2318,12 +2328,23 @@ static noinline int run_clustered_refs(struct btrfs_trans_handle *trans,
 		ref->in_tree = 0;
 		rb_erase(&ref->rb_node, &delayed_refs->root);
 		delayed_refs->num_entries--;
-		/*
-		 * we modified num_entries, but as we're currently running
-		 * delayed refs, skip
-		 *     wake_up(&delayed_refs->seq_wait);
-		 * here.
-		 */
+		if (locked_ref) {
+			/*
+			 * when we play the delayed ref, also correct the
+			 * ref_mod on head
+			 */
+			switch (ref->action) {
+			case BTRFS_ADD_DELAYED_REF:
+			case BTRFS_ADD_DELAYED_EXTENT:
+				locked_ref->node.ref_mod -= ref->ref_mod;
+				break;
+			case BTRFS_DROP_DELAYED_REF:
+				locked_ref->node.ref_mod += ref->ref_mod;
+				break;
+			default:
+				WARN_ON(1);
+			}
+		}
 		spin_unlock(&delayed_refs->lock);
 
 		ret = run_one_delayed_ref(trans, root, ref, extent_op,
@@ -2350,22 +2371,6 @@ next:
 	return count;
 }
 
-static void wait_for_more_refs(struct btrfs_fs_info *fs_info,
-			       struct btrfs_delayed_ref_root *delayed_refs,
-			       unsigned long num_refs,
-			       struct list_head *first_seq)
-{
-	spin_unlock(&delayed_refs->lock);
-	pr_debug("waiting for more refs (num %ld, first %p)\n",
-		 num_refs, first_seq);
-	wait_event(fs_info->tree_mod_seq_wait,
-		   num_refs != delayed_refs->num_entries ||
-		   fs_info->tree_mod_seq_list.next != first_seq);
-	pr_debug("done waiting for more refs (num %ld, first %p)\n",
-		 delayed_refs->num_entries, fs_info->tree_mod_seq_list.next);
-	spin_lock(&delayed_refs->lock);
-}
-
 #ifdef SCRAMBLE_DELAYED_REFS
 /*
  * Normally delayed refs get processed in ascending bytenr order. This
@@ -2460,13 +2465,11 @@ int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
 	struct btrfs_delayed_ref_root *delayed_refs;
 	struct btrfs_delayed_ref_node *ref;
 	struct list_head cluster;
-	struct list_head *first_seq = NULL;
 	int ret;
 	u64 delayed_start;
 	int run_all = count == (unsigned long)-1;
 	int run_most = 0;
-	unsigned long num_refs = 0;
-	int consider_waiting;
+	int loops;
 
 	/* We'll clean this up in btrfs_cleanup_transaction */
 	if (trans->aborted)
@@ -2484,7 +2487,7 @@ int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
 	delayed_refs = &trans->transaction->delayed_refs;
 	INIT_LIST_HEAD(&cluster);
 again:
-	consider_waiting = 0;
+	loops = 0;
 	spin_lock(&delayed_refs->lock);
 
 #ifdef SCRAMBLE_DELAYED_REFS
@@ -2512,31 +2515,6 @@ again:
 		if (ret)
 			break;
 
-		if (delayed_start >= delayed_refs->run_delayed_start) {
-			if (consider_waiting == 0) {
-				/*
-				 * btrfs_find_ref_cluster looped. let's do one
-				 * more cycle. if we don't run any delayed ref
-				 * during that cycle (because we can't because
-				 * all of them are blocked) and if the number of
-				 * refs doesn't change, we avoid busy waiting.
-				 */
-				consider_waiting = 1;
-				num_refs = delayed_refs->num_entries;
-				first_seq = root->fs_info->tree_mod_seq_list.next;
-			} else {
-				wait_for_more_refs(root->fs_info, delayed_refs,
-						   num_refs, first_seq);
-				/*
-				 * after waiting, things have changed. we
-				 * dropped the lock and someone else might have
-				 * run some refs, built new clusters and so on.
-				 * therefore, we restart staleness detection.
-				 */
-				consider_waiting = 0;
-			}
-		}
-
 		ret = run_clustered_refs(trans, root, &cluster);
 		if (ret < 0) {
 			spin_unlock(&delayed_refs->lock);
@@ -2549,9 +2527,26 @@ again:
 		if (count == 0)
 			break;
 
-		if (ret || delayed_refs->run_delayed_start == 0) {
+		if (delayed_start >= delayed_refs->run_delayed_start) {
+			if (loops == 0) {
+				/*
+				 * btrfs_find_ref_cluster looped. let's do one
+				 * more cycle. if we don't run any delayed ref
+				 * during that cycle (because we can't because
+				 * all of them are blocked), bail out.
+				 */
+				loops = 1;
+			} else {
+				/*
+				 * no runnable refs left, stop trying
+				 */
+				BUG_ON(run_all);
+				break;
+			}
+		}
+		if (ret) {
 			/* refs were run, let's reset staleness detection */
-			consider_waiting = 0;
+			loops = 0;
 		}
 	}
 
@@ -3007,17 +3002,16 @@ again:
 	}
 	spin_unlock(&block_group->lock);
 
-	num_pages = (int)div64_u64(block_group->key.offset, 1024 * 1024 * 1024);
+	/*
+	 * Try to preallocate enough space based on how big the block group is.
+	 * Keep in mind this has to include any pinned space which could end up
+	 * taking up quite a bit since it's not folded into the other space
+	 * cache.
+	 */
+	num_pages = (int)div64_u64(block_group->key.offset, 256 * 1024 * 1024);
 	if (!num_pages)
 		num_pages = 1;
 
-	/*
-	 * Just to make absolutely sure we have enough space, we're going to
-	 * preallocate 12 pages worth of space for each block group.  In
-	 * practice we ought to use at most 8, but we need extra space so we can
-	 * add our header and have a terminator between the extents and the
-	 * bitmaps.
-	 */
 	num_pages *= 16;
 	num_pages *= PAGE_CACHE_SIZE;
 
@@ -4571,8 +4565,10 @@ int btrfs_delalloc_reserve_metadata(struct inode *inode, u64 num_bytes)
 	if (root->fs_info->quota_enabled) {
 		ret = btrfs_qgroup_reserve(root, num_bytes +
 					   nr_extents * root->leafsize);
-		if (ret)
+		if (ret) {
+			mutex_unlock(&BTRFS_I(inode)->delalloc_mutex);
 			return ret;
+		}
 	}
 
 	ret = reserve_metadata_bytes(root, block_rsv, to_reserve, flush);
@@ -5294,9 +5290,6 @@ static noinline int check_ref_cleanup(struct btrfs_trans_handle *trans,
 	rb_erase(&head->node.rb_node, &delayed_refs->root);
 
 	delayed_refs->num_entries--;
-	smp_mb();
-	if (waitqueue_active(&root->fs_info->tree_mod_seq_wait))
-		wake_up(&root->fs_info->tree_mod_seq_wait);
 
 	/*
 	 * we don't take a ref on the node because we're removing it from the
diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index 45c81bb4ac8..4c878476bb9 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -2330,23 +2330,10 @@ static void end_bio_extent_readpage(struct bio *bio, int err)
 		if (uptodate && tree->ops && tree->ops->readpage_end_io_hook) {
 			ret = tree->ops->readpage_end_io_hook(page, start, end,
 							      state, mirror);
-			if (ret) {
-				/* no IO indicated but software detected errors
-				 * in the block, either checksum errors or
-				 * issues with the contents */
-				struct btrfs_root *root =
-					BTRFS_I(page->mapping->host)->root;
-				struct btrfs_device *device;
-
+			if (ret)
 				uptodate = 0;
-				device = btrfs_find_device_for_logical(
-						root, start, mirror);
-				if (device)
-					btrfs_dev_stat_inc_and_print(device,
-						BTRFS_DEV_STAT_CORRUPTION_ERRS);
-			} else {
+			else
 				clean_io_failure(start, page);
-			}
 		}
 
 		if (!uptodate && tree->ops && tree->ops->readpage_io_failed_hook) {
diff --git a/fs/btrfs/file-item.c b/fs/btrfs/file-item.c
index b45b9de0c21..857d93cd01d 100644
--- a/fs/btrfs/file-item.c
+++ b/fs/btrfs/file-item.c
@@ -272,9 +272,9 @@ int btrfs_lookup_bio_sums(struct btrfs_root *root, struct inode *inode,
 }
 
 int btrfs_lookup_bio_sums_dio(struct btrfs_root *root, struct inode *inode,
-			      struct bio *bio, u64 offset, u32 *dst)
+			      struct bio *bio, u64 offset)
 {
-	return __btrfs_lookup_bio_sums(root, inode, bio, offset, dst, 1);
+	return __btrfs_lookup_bio_sums(root, inode, bio, offset, NULL, 1);
 }
 
 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end,
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 6e8f416773d..ec154f95464 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -1008,9 +1008,7 @@ static noinline void async_cow_submit(struct btrfs_work *work)
 	nr_pages = (async_cow->end - async_cow->start + PAGE_CACHE_SIZE) >>
 		PAGE_CACHE_SHIFT;
 
-	atomic_sub(nr_pages, &root->fs_info->async_delalloc_pages);
-
-	if (atomic_read(&root->fs_info->async_delalloc_pages) <
+	if (atomic_sub_return(nr_pages, &root->fs_info->async_delalloc_pages) <
 	    5 * 1024 * 1024 &&
 	    waitqueue_active(&root->fs_info->async_submit_wait))
 		wake_up(&root->fs_info->async_submit_wait);
@@ -1885,8 +1883,11 @@ static int btrfs_finish_ordered_io(struct btrfs_ordered_extent *ordered_extent)
 				trans = btrfs_join_transaction_nolock(root);
 			else
 				trans = btrfs_join_transaction(root);
-			if (IS_ERR(trans))
-				return PTR_ERR(trans);
+			if (IS_ERR(trans)) {
+				ret = PTR_ERR(trans);
+				trans = NULL;
+				goto out;
+			}
 			trans->block_rsv = &root->fs_info->delalloc_block_rsv;
 			ret = btrfs_update_inode_fallback(trans, root, inode);
 			if (ret) /* -ENOMEM or corruption */
@@ -3174,7 +3175,7 @@ int btrfs_unlink_subvol(struct btrfs_trans_handle *trans,
 	btrfs_i_size_write(dir, dir->i_size - name_len * 2);
 	inode_inc_iversion(dir);
 	dir->i_mtime = dir->i_ctime = CURRENT_TIME;
-	ret = btrfs_update_inode(trans, root, dir);
+	ret = btrfs_update_inode_fallback(trans, root, dir);
 	if (ret)
 		btrfs_abort_transaction(trans, root, ret);
 out:
@@ -5774,18 +5775,112 @@ out:
 	return ret;
 }
 
+static int lock_extent_direct(struct inode *inode, u64 lockstart, u64 lockend,
+			      struct extent_state **cached_state, int writing)
+{
+	struct btrfs_ordered_extent *ordered;
+	int ret = 0;
+
+	while (1) {
+		lock_extent_bits(&BTRFS_I(inode)->io_tree, lockstart, lockend,
+				 0, cached_state);
+		/*
+		 * We're concerned with the entire range that we're going to be
+		 * doing DIO to, so we need to make sure theres no ordered
+		 * extents in this range.
+		 */
+		ordered = btrfs_lookup_ordered_range(inode, lockstart,
+						     lockend - lockstart + 1);
+
+		/*
+		 * We need to make sure there are no buffered pages in this
+		 * range either, we could have raced between the invalidate in
+		 * generic_file_direct_write and locking the extent.  The
+		 * invalidate needs to happen so that reads after a write do not
+		 * get stale data.
+		 */
+		if (!ordered && (!writing ||
+		    !test_range_bit(&BTRFS_I(inode)->io_tree,
+				    lockstart, lockend, EXTENT_UPTODATE, 0,
+				    *cached_state)))
+			break;
+
+		unlock_extent_cached(&BTRFS_I(inode)->io_tree, lockstart, lockend,
+				     cached_state, GFP_NOFS);
+
+		if (ordered) {
+			btrfs_start_ordered_extent(inode, ordered, 1);
+			btrfs_put_ordered_extent(ordered);
+		} else {
+			/* Screw you mmap */
+			ret = filemap_write_and_wait_range(inode->i_mapping,
+							   lockstart,
+							   lockend);
+			if (ret)
+				break;
+
+			/*
+			 * If we found a page that couldn't be invalidated just
+			 * fall back to buffered.
+			 */
+			ret = invalidate_inode_pages2_range(inode->i_mapping,
+					lockstart >> PAGE_CACHE_SHIFT,
+					lockend >> PAGE_CACHE_SHIFT);
+			if (ret)
+				break;
+		}
+
+		cond_resched();
+	}
+
+	return ret;
+}
+
 static int btrfs_get_blocks_direct(struct inode *inode, sector_t iblock,
 				   struct buffer_head *bh_result, int create)
 {
 	struct extent_map *em;
 	struct btrfs_root *root = BTRFS_I(inode)->root;
+	struct extent_state *cached_state = NULL;
 	u64 start = iblock << inode->i_blkbits;
+	u64 lockstart, lockend;
 	u64 len = bh_result->b_size;
 	struct btrfs_trans_handle *trans;
+	int unlock_bits = EXTENT_LOCKED;
+	int ret;
+
+	if (create) {
+		ret = btrfs_delalloc_reserve_space(inode, len);
+		if (ret)
+			return ret;
+		unlock_bits |= EXTENT_DELALLOC | EXTENT_DIRTY;
+	} else {
+		len = min_t(u64, len, root->sectorsize);
+	}
+
+	lockstart = start;
+	lockend = start + len - 1;
+
+	/*
+	 * If this errors out it's because we couldn't invalidate pagecache for
+	 * this range and we need to fallback to buffered.
+	 */
+	if (lock_extent_direct(inode, lockstart, lockend, &cached_state, create))
+		return -ENOTBLK;
+
+	if (create) {
+		ret = set_extent_bit(&BTRFS_I(inode)->io_tree, lockstart,
+				     lockend, EXTENT_DELALLOC, NULL,
+				     &cached_state, GFP_NOFS);
+		if (ret)
+			goto unlock_err;
+	}
 
 	em = btrfs_get_extent(inode, NULL, 0, start, len, 0);
-	if (IS_ERR(em))
-		return PTR_ERR(em);
+	if (IS_ERR(em)) {
+		ret = PTR_ERR(em);
+		goto unlock_err;
+	}
 
 	/*
 	 * Ok for INLINE and COMPRESSED extents we need to fallback on buffered
@@ -5804,17 +5899,16 @@ static int btrfs_get_blocks_direct(struct inode *inode, sector_t iblock,
 	if (test_bit(EXTENT_FLAG_COMPRESSED, &em->flags) ||
 	    em->block_start == EXTENT_MAP_INLINE) {
 		free_extent_map(em);
-		return -ENOTBLK;
+		ret = -ENOTBLK;
+		goto unlock_err;
 	}
 
 	/* Just a good old fashioned hole, return */
 	if (!create && (em->block_start == EXTENT_MAP_HOLE ||
 			test_bit(EXTENT_FLAG_PREALLOC, &em->flags))) {
 		free_extent_map(em);
-		/* DIO will do one hole at a time, so just unlock a sector */
-		unlock_extent(&BTRFS_I(inode)->io_tree, start,
-			      start + root->sectorsize - 1);
-		return 0;
+		ret = 0;
+		goto unlock_err;
 	}
 
 	/*
@@ -5827,8 +5921,9 @@ static int btrfs_get_blocks_direct(struct inode *inode, sector_t iblock,
 	 *
 	 */
 	if (!create) {
-		len = em->len - (start - em->start);
-		goto map;
+		len = min(len, em->len - (start - em->start));
+		lockstart = start + len;
+		goto unlock;
 	}
 
 	if (test_bit(EXTENT_FLAG_PREALLOC, &em->flags) ||
@@ -5860,7 +5955,7 @@ static int btrfs_get_blocks_direct(struct inode *inode, sector_t iblock,
 			btrfs_end_transaction(trans, root);
 			if (ret) {
 				free_extent_map(em);
-				return ret;
+				goto unlock_err;
 			}
 			goto unlock;
 		}
@@ -5873,14 +5968,12 @@ must_cow:
 	 */
 	len = bh_result->b_size;
 	em = btrfs_new_extent_direct(inode, em, start, len);
-	if (IS_ERR(em))
-		return PTR_ERR(em);
+	if (IS_ERR(em)) {
+		ret = PTR_ERR(em);
+		goto unlock_err;
+	}
 	len = min(len, em->len - (start - em->start));
 unlock:
-	clear_extent_bit(&BTRFS_I(inode)->io_tree, start, start + len - 1,
-			  EXTENT_LOCKED | EXTENT_DELALLOC | EXTENT_DIRTY, 1,
-			  0, NULL, GFP_NOFS);
-map:
 	bh_result->b_blocknr = (em->block_start + (start - em->start)) >>
 		inode->i_blkbits;
 	bh_result->b_size = len;
@@ -5898,9 +5991,44 @@ map:
 			i_size_write(inode, start + len);
 	}
 
+	/*
+	 * In the case of write we need to clear and unlock the entire range,
+	 * in the case of read we need to unlock only the end area that we
+	 * aren't using if there is any left over space.
+	 */
+	if (lockstart < lockend) {
+		if (create && len < lockend - lockstart) {
+			clear_extent_bit(&BTRFS_I(inode)->io_tree, lockstart,
+					 lockstart + len - 1, unlock_bits, 1, 0,
+					 &cached_state, GFP_NOFS);
+			/*
+			 * Beside unlock, we also need to cleanup reserved space
+			 * for the left range by attaching EXTENT_DO_ACCOUNTING.
+			 */
+			clear_extent_bit(&BTRFS_I(inode)->io_tree,
+					 lockstart + len, lockend,
+					 unlock_bits | EXTENT_DO_ACCOUNTING,
+					 1, 0, NULL, GFP_NOFS);
+		} else {
+			clear_extent_bit(&BTRFS_I(inode)->io_tree, lockstart,
+					 lockend, unlock_bits, 1, 0,
+					 &cached_state, GFP_NOFS);
+		}
+	} else {
+		free_extent_state(cached_state);
+	}
+
 	free_extent_map(em);
 
 	return 0;
+
+unlock_err:
+	if (create)
+		unlock_bits |= EXTENT_DO_ACCOUNTING;
+
+	clear_extent_bit(&BTRFS_I(inode)->io_tree, lockstart, lockend,
+			 unlock_bits, 1, 0, &cached_state, GFP_NOFS);
+	return ret;
 }
 
 struct btrfs_dio_private {
@@ -5908,7 +6036,6 @@ struct btrfs_dio_private {
 	u64 logical_offset;
 	u64 disk_bytenr;
 	u64 bytes;
-	u32 *csums;
 	void *private;
 
 	/* number of bios pending for this dio */
@@ -5928,7 +6055,6 @@ static void btrfs_endio_direct_read(struct bio *bio, int err)
 	struct inode *inode = dip->inode;
 	struct btrfs_root *root = BTRFS_I(inode)->root;
 	u64 start;
-	u32 *private = dip->csums;
 
 	start = dip->logical_offset;
 	do {
@@ -5936,8 +6062,12 @@ static void btrfs_endio_direct_read(struct bio *bio, int err)
 			struct page *page = bvec->bv_page;
 			char *kaddr;
 			u32 csum = ~(u32)0;
+			u64 private = ~(u32)0;
 			unsigned long flags;
 
+			if (get_state_private(&BTRFS_I(inode)->io_tree,
+					      start, &private))
+				goto failed;
 			local_irq_save(flags);
 			kaddr = kmap_atomic(page);
 			csum = btrfs_csum_data(root, kaddr + bvec->bv_offset,
@@ -5947,18 +6077,18 @@ static void btrfs_endio_direct_read(struct bio *bio, int err)
 			local_irq_restore(flags);
 
 			flush_dcache_page(bvec->bv_page);
-			if (csum != *private) {
+			if (csum != private) {
+failed:
 				printk(KERN_ERR "btrfs csum failed ino %llu off"
 				      " %llu csum %u private %u\n",
 				      (unsigned long long)btrfs_ino(inode),
 				      (unsigned long long)start,
-				      csum, *private);
+				      csum, (unsigned)private);
 				err = -EIO;
 			}
 		}
 
 		start += bvec->bv_len;
-		private++;
 		bvec++;
 	} while (bvec <= bvec_end);
 
@@ -5966,7 +6096,6 @@ static void btrfs_endio_direct_read(struct bio *bio, int err)
 		      dip->logical_offset + dip->bytes - 1);
 	bio->bi_private = dip->private;
 
-	kfree(dip->csums);
 	kfree(dip);
 
 	/* If we had a csum failure make sure to clear the uptodate flag */
@@ -6072,7 +6201,7 @@ static struct bio *btrfs_dio_bio_alloc(struct block_device *bdev,
 
 static inline int __btrfs_submit_dio_bio(struct bio *bio, struct inode *inode,
 					 int rw, u64 file_offset, int skip_sum,
-					 u32 *csums, int async_submit)
+					 int async_submit)
 {
 	int write = rw & REQ_WRITE;
 	struct btrfs_root *root = BTRFS_I(inode)->root;
@@ -6105,8 +6234,7 @@ static inline int __btrfs_submit_dio_bio(struct bio *bio, struct inode *inode,
 		if (ret)
 			goto err;
 	} else if (!skip_sum) {
-		ret = btrfs_lookup_bio_sums_dio(root, inode, bio,
-					  file_offset, csums);
+		ret = btrfs_lookup_bio_sums_dio(root, inode, bio, file_offset);
 		if (ret)
 			goto err;
 	}
@@ -6132,10 +6260,8 @@ static int btrfs_submit_direct_hook(int rw, struct btrfs_dio_private *dip,
 	u64 submit_len = 0;
 	u64 map_length;
 	int nr_pages = 0;
-	u32 *csums = dip->csums;
 	int ret = 0;
 	int async_submit = 0;
-	int write = rw & REQ_WRITE;
 
 	map_length = orig_bio->bi_size;
 	ret = btrfs_map_block(map_tree, READ, start_sector << 9,
@@ -6171,16 +6297,13 @@ static int btrfs_submit_direct_hook(int rw, struct btrfs_dio_private *dip,
 			atomic_inc(&dip->pending_bios);
 			ret = __btrfs_submit_dio_bio(bio, inode, rw,
 						     file_offset, skip_sum,
-						     csums, async_submit);
+						     async_submit);
 			if (ret) {
 				bio_put(bio);
 				atomic_dec(&dip->pending_bios);
 				goto out_err;
 			}
 
-			/* Write's use the ordered csums */
-			if (!write && !skip_sum)
-				csums = csums + nr_pages;
 			start_sector += submit_len >> 9;
 			file_offset += submit_len;
 
@@ -6210,7 +6333,7 @@ static int btrfs_submit_direct_hook(int rw, struct btrfs_dio_private *dip,
 
 submit:
 	ret = __btrfs_submit_dio_bio(bio, inode, rw, file_offset, skip_sum,
-				     csums, async_submit);
+				     async_submit);
 	if (!ret)
 		return 0;
 
@@ -6246,17 +6369,6 @@ static void btrfs_submit_direct(int rw, struct bio *bio, struct inode *inode,
 		ret = -ENOMEM;
 		goto free_ordered;
 	}
-	dip->csums = NULL;
-
-	/* Write's use the ordered csum stuff, so we don't need dip->csums */
-	if (!write && !skip_sum) {
-		dip->csums = kmalloc(sizeof(u32) * bio->bi_vcnt, GFP_NOFS);
-		if (!dip->csums) {
-			kfree(dip);
-			ret = -ENOMEM;
-			goto free_ordered;
-		}
-	}
 
 	dip->private = bio->bi_private;
 	dip->inode = inode;
@@ -6341,132 +6453,22 @@ static ssize_t check_direct_IO(struct btrfs_root *root, int rw, struct kiocb *io
 out:
 	return retval;
 }
+
 static ssize_t btrfs_direct_IO(int rw, struct kiocb *iocb,
 			const struct iovec *iov, loff_t offset,
 			unsigned long nr_segs)
 {
 	struct file *file = iocb->ki_filp;
 	struct inode *inode = file->f_mapping->host;
-	struct btrfs_ordered_extent *ordered;
-	struct extent_state *cached_state = NULL;
-	u64 lockstart, lockend;
-	ssize_t ret;
-	int writing = rw & WRITE;
-	int write_bits = 0;
-	size_t count = iov_length(iov, nr_segs);
 
 	if (check_direct_IO(BTRFS_I(inode)->root, rw, iocb, iov,
-			    offset, nr_segs)) {
+			    offset, nr_segs))
 		return 0;
-	}
-
-	lockstart = offset;
-	lockend = offset + count - 1;
-
-	if (writing) {
-		ret = btrfs_delalloc_reserve_space(inode, count);
-		if (ret)
-			goto out;
-	}
-
-	while (1) {
-		lock_extent_bits(&BTRFS_I(inode)->io_tree, lockstart, lockend,
-				 0, &cached_state);
-		/*
-		 * We're concerned with the entire range that we're going to be
-		 * doing DIO to, so we need to make sure theres no ordered
-		 * extents in this range.
-		 */
-		ordered = btrfs_lookup_ordered_range(inode, lockstart,
-						     lockend - lockstart + 1);
-
-		/*
-		 * We need to make sure there are no buffered pages in this
-		 * range either, we could have raced between the invalidate in
-		 * generic_file_direct_write and locking the extent.  The
-		 * invalidate needs to happen so that reads after a write do not
-		 * get stale data.
-		 */
-		if (!ordered && (!writing ||
-		    !test_range_bit(&BTRFS_I(inode)->io_tree,
-				    lockstart, lockend, EXTENT_UPTODATE, 0,
-				    cached_state)))
-			break;
-
-		unlock_extent_cached(&BTRFS_I(inode)->io_tree, lockstart, lockend,
-				     &cached_state, GFP_NOFS);
-
-		if (ordered) {
-			btrfs_start_ordered_extent(inode, ordered, 1);
-			btrfs_put_ordered_extent(ordered);
-		} else {
-			/* Screw you mmap */
-			ret = filemap_write_and_wait_range(file->f_mapping,
-							   lockstart,
-							   lockend);
-			if (ret)
-				goto out;
-
-			/*
-			 * If we found a page that couldn't be invalidated just
-			 * fall back to buffered.
-			 */
-			ret = invalidate_inode_pages2_range(file->f_mapping,
-					lockstart >> PAGE_CACHE_SHIFT,
-					lockend >> PAGE_CACHE_SHIFT);
-			if (ret) {
-				if (ret == -EBUSY)
-					ret = 0;
-				goto out;
-			}
-		}
-
-		cond_resched();
-	}
 
-	/*
-	 * we don't use btrfs_set_extent_delalloc because we don't want
-	 * the dirty or uptodate bits
-	 */
-	if (writing) {
-		write_bits = EXTENT_DELALLOC | EXTENT_DO_ACCOUNTING;
-		ret = set_extent_bit(&BTRFS_I(inode)->io_tree, lockstart, lockend,
-				     EXTENT_DELALLOC, NULL, &cached_state,
-				     GFP_NOFS);
-		if (ret) {
-			clear_extent_bit(&BTRFS_I(inode)->io_tree, lockstart,
-					 lockend, EXTENT_LOCKED | write_bits,
-					 1, 0, &cached_state, GFP_NOFS);
-			goto out;
-		}
-	}
-
-	free_extent_state(cached_state);
-	cached_state = NULL;
-
-	ret = __blockdev_direct_IO(rw, iocb, inode,
+	return __blockdev_direct_IO(rw, iocb, inode,
 		   BTRFS_I(inode)->root->fs_info->fs_devices->latest_bdev,
 		   iov, offset, nr_segs, btrfs_get_blocks_direct, NULL,
 		   btrfs_submit_direct, 0);
-
-	if (ret < 0 && ret != -EIOCBQUEUED) {
-		clear_extent_bit(&BTRFS_I(inode)->io_tree, offset,
-			      offset + iov_length(iov, nr_segs) - 1,
-			      EXTENT_LOCKED | write_bits, 1, 0,
-			      &cached_state, GFP_NOFS);
-	} else if (ret >= 0 && ret < iov_length(iov, nr_segs)) {
-		/*
-		 * We're falling back to buffered, unlock the section we didn't
-		 * do IO on.
-		 */
-		clear_extent_bit(&BTRFS_I(inode)->io_tree, offset + ret,
-			      offset + iov_length(iov, nr_segs) - 1,
-			      EXTENT_LOCKED | write_bits, 1, 0,
-			      &cached_state, GFP_NOFS);
-	}
-out:
-	free_extent_state(cached_state);
-	return ret;
 }
 
 static int btrfs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index 7bb755677a2..9df50fa8a07 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -424,7 +424,7 @@ static noinline int create_subvol(struct btrfs_root *root,
 	uuid_le_gen(&new_uuid);
 	memcpy(root_item.uuid, new_uuid.b, BTRFS_UUID_SIZE);
 	root_item.otime.sec = cpu_to_le64(cur_time.tv_sec);
-	root_item.otime.nsec = cpu_to_le64(cur_time.tv_nsec);
+	root_item.otime.nsec = cpu_to_le32(cur_time.tv_nsec);
 	root_item.ctime = root_item.otime;
 	btrfs_set_root_ctransid(&root_item, trans->transid);
 	btrfs_set_root_otransid(&root_item, trans->transid);
diff --git a/fs/btrfs/locking.c b/fs/btrfs/locking.c
index a44eff07480..2a1762c6604 100644
--- a/fs/btrfs/locking.c
+++ b/fs/btrfs/locking.c
@@ -67,7 +67,7 @@ void btrfs_clear_lock_blocking_rw(struct extent_buffer *eb, int rw)
 {
 	if (eb->lock_nested) {
 		read_lock(&eb->lock);
-		if (&eb->lock_nested && current->pid == eb->lock_owner) {
+		if (eb->lock_nested && current->pid == eb->lock_owner) {
 			read_unlock(&eb->lock);
 			return;
 		}
diff --git a/fs/btrfs/qgroup.c b/fs/btrfs/qgroup.c
index bc424ae5a81..b6501558174 100644
--- a/fs/btrfs/qgroup.c
+++ b/fs/btrfs/qgroup.c
@@ -1364,8 +1364,10 @@ int btrfs_qgroup_inherit(struct btrfs_trans_handle *trans,
 	spin_lock(&fs_info->qgroup_lock);
 
 	dstgroup = add_qgroup_rb(fs_info, objectid);
-	if (!dstgroup)
+	if (IS_ERR(dstgroup)) {
+		ret = PTR_ERR(dstgroup);
 		goto unlock;
+	}
 
 	if (srcid) {
 		srcgroup = find_qgroup_rb(fs_info, srcid);
diff --git a/fs/btrfs/root-tree.c b/fs/btrfs/root-tree.c
index 6bb465cca20..10d8e4d8807 100644
--- a/fs/btrfs/root-tree.c
+++ b/fs/btrfs/root-tree.c
@@ -544,8 +544,8 @@ void btrfs_update_root_times(struct btrfs_trans_handle *trans,
 	struct timespec ct = CURRENT_TIME;
 
 	spin_lock(&root->root_times_lock);
-	item->ctransid = trans->transid;
+	item->ctransid = cpu_to_le64(trans->transid);
 	item->ctime.sec = cpu_to_le64(ct.tv_sec);
-	item->ctime.nsec = cpu_to_le64(ct.tv_nsec);
+	item->ctime.nsec = cpu_to_le32(ct.tv_nsec);
 	spin_unlock(&root->root_times_lock);
 }
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index f2eb24c477a..83d6f9f9c22 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -838,7 +838,6 @@ int btrfs_sync_fs(struct super_block *sb, int wait)
 	struct btrfs_trans_handle *trans;
 	struct btrfs_fs_info *fs_info = btrfs_sb(sb);
 	struct btrfs_root *root = fs_info->tree_root;
-	int ret;
 
 	trace_btrfs_sync_fs(wait);
 
@@ -849,11 +848,17 @@ int btrfs_sync_fs(struct super_block *sb, int wait)
 
 	btrfs_wait_ordered_extents(root, 0, 0);
 
-	trans = btrfs_start_transaction(root, 0);
+	spin_lock(&fs_info->trans_lock);
+	if (!fs_info->running_transaction) {
+		spin_unlock(&fs_info->trans_lock);
+		return 0;
+	}
+	spin_unlock(&fs_info->trans_lock);
+
+	trans = btrfs_join_transaction(root);
 	if (IS_ERR(trans))
 		return PTR_ERR(trans);
-	ret = btrfs_commit_transaction(trans, root);
-	return ret;
+	return btrfs_commit_transaction(trans, root);
 }
 
 static int btrfs_show_options(struct seq_file *seq, struct dentry *dentry)
@@ -1530,6 +1535,8 @@ static int btrfs_show_devname(struct seq_file *m, struct dentry *root)
 	while (cur_devices) {
 		head = &cur_devices->devices;
 		list_for_each_entry(dev, head, dev_list) {
+			if (dev->missing)
+				continue;
 			if (!first_dev || dev->devid < first_dev->devid)
 				first_dev = dev;
 		}
diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c
index 17be3dedacb..27c26004e05 100644
--- a/fs/btrfs/transaction.c
+++ b/fs/btrfs/transaction.c
@@ -1031,6 +1031,7 @@ static noinline int create_pending_snapshot(struct btrfs_trans_handle *trans,
 
 	btrfs_i_size_write(parent_inode, parent_inode->i_size +
 					 dentry->d_name.len * 2);
+	parent_inode->i_mtime = parent_inode->i_ctime = CURRENT_TIME;
 	ret = btrfs_update_inode(trans, parent_root, parent_inode);
 	if (ret)
 		goto abort_trans_dput;
@@ -1066,7 +1067,7 @@ static noinline int create_pending_snapshot(struct btrfs_trans_handle *trans,
 	memcpy(new_root_item->parent_uuid, root->root_item.uuid,
 			BTRFS_UUID_SIZE);
 	new_root_item->otime.sec = cpu_to_le64(cur_time.tv_sec);
-	new_root_item->otime.nsec = cpu_to_le64(cur_time.tv_nsec);
+	new_root_item->otime.nsec = cpu_to_le32(cur_time.tv_nsec);
 	btrfs_set_root_otransid(new_root_item, trans->transid);
 	memset(&new_root_item->stime, 0, sizeof(new_root_item->stime));
 	memset(&new_root_item->rtime, 0, sizeof(new_root_item->rtime));
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index e86ae04abe6..88b969aeeb7 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -227,9 +227,8 @@ loop_lock:
 		cur = pending;
 		pending = pending->bi_next;
 		cur->bi_next = NULL;
-		atomic_dec(&fs_info->nr_async_bios);
 
-		if (atomic_read(&fs_info->nr_async_bios) < limit &&
+		if (atomic_dec_return(&fs_info->nr_async_bios) < limit &&
 		    waitqueue_active(&fs_info->async_submit_wait))
 			wake_up(&fs_info->async_submit_wait);
 
@@ -569,9 +568,11 @@ static int __btrfs_close_devices(struct btrfs_fs_devices *fs_devices)
 		memcpy(new_device, device, sizeof(*new_device));
 
 		/* Safe because we are under uuid_mutex */
-		name = rcu_string_strdup(device->name->str, GFP_NOFS);
-		BUG_ON(device->name && !name); /* -ENOMEM */
-		rcu_assign_pointer(new_device->name, name);
+		if (device->name) {
+			name = rcu_string_strdup(device->name->str, GFP_NOFS);
+			BUG_ON(device->name && !name); /* -ENOMEM */
+			rcu_assign_pointer(new_device->name, name);
+		}
 		new_device->bdev = NULL;
 		new_device->writeable = 0;
 		new_device->in_fs_metadata = 0;
@@ -4605,28 +4606,6 @@ int btrfs_read_sys_array(struct btrfs_root *root)
 	return ret;
 }
 
-struct btrfs_device *btrfs_find_device_for_logical(struct btrfs_root *root,
-						   u64 logical, int mirror_num)
-{
-	struct btrfs_mapping_tree *map_tree = &root->fs_info->mapping_tree;
-	int ret;
-	u64 map_length = 0;
-	struct btrfs_bio *bbio = NULL;
-	struct btrfs_device *device;
-
-	BUG_ON(mirror_num == 0);
-	ret = btrfs_map_block(map_tree, WRITE, logical, &map_length, &bbio,
-			      mirror_num);
-	if (ret) {
-		BUG_ON(bbio != NULL);
-		return NULL;
-	}
-	BUG_ON(mirror_num != bbio->mirror_num);
-	device = bbio->stripes[mirror_num - 1].dev;
-	kfree(bbio);
-	return device;
-}
-
 int btrfs_read_chunk_tree(struct btrfs_root *root)
 {
 	struct btrfs_path *path;
diff --git a/fs/btrfs/volumes.h b/fs/btrfs/volumes.h
index 5479325987b..53c06af92e8 100644
--- a/fs/btrfs/volumes.h
+++ b/fs/btrfs/volumes.h
@@ -289,8 +289,6 @@ int btrfs_cancel_balance(struct btrfs_fs_info *fs_info);
 int btrfs_chunk_readonly(struct btrfs_root *root, u64 chunk_offset);
 int find_free_dev_extent(struct btrfs_device *device, u64 num_bytes,
 			 u64 *start, u64 *max_avail);
-struct btrfs_device *btrfs_find_device_for_logical(struct btrfs_root *root,
-						   u64 logical, int mirror_num);
 void btrfs_dev_stat_print_on_error(struct btrfs_device *device);
 void btrfs_dev_stat_inc_and_print(struct btrfs_device *dev, int index);
 int btrfs_get_dev_stats(struct btrfs_root *root,
diff --git a/fs/buffer.c b/fs/buffer.c
index 9f6d2e41281..58e2e7b7737 100644
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -914,7 +914,7 @@ link_dev_buffers(struct page *page, struct buffer_head *head)
 /*
  * Initialise the state of a blockdev page's buffers.
  */ 
-static void
+static sector_t
 init_page_buffers(struct page *page, struct block_device *bdev,
 			sector_t block, int size)
 {
@@ -936,33 +936,41 @@ init_page_buffers(struct page *page, struct block_device *bdev,
 		block++;
 		bh = bh->b_this_page;
 	} while (bh != head);
+
+	/*
+	 * Caller needs to validate requested block against end of device.
+	 */
+	return end_block;
 }
 
 /*
  * Create the page-cache page that contains the requested block.
  *
- * This is user purely for blockdev mappings.
+ * This is used purely for blockdev mappings.
  */
-static struct page *
+static int
 grow_dev_page(struct block_device *bdev, sector_t block,
-		pgoff_t index, int size)
+		pgoff_t index, int size, int sizebits)
 {
 	struct inode *inode = bdev->bd_inode;
 	struct page *page;
 	struct buffer_head *bh;
+	sector_t end_block;
+	int ret = 0;		/* Will call free_more_memory() */
 
 	page = find_or_create_page(inode->i_mapping, index,
 		(mapping_gfp_mask(inode->i_mapping) & ~__GFP_FS)|__GFP_MOVABLE);
 	if (!page)
-		return NULL;
+		return ret;
 
 	BUG_ON(!PageLocked(page));
 
 	if (page_has_buffers(page)) {
 		bh = page_buffers(page);
 		if (bh->b_size == size) {
-			init_page_buffers(page, bdev, block, size);
-			return page;
+			end_block = init_page_buffers(page, bdev,
+						index << sizebits, size);
+			goto done;
 		}
 		if (!try_to_free_buffers(page))
 			goto failed;
@@ -982,14 +990,14 @@ grow_dev_page(struct block_device *bdev, sector_t block,
 	 */
 	spin_lock(&inode->i_mapping->private_lock);
 	link_dev_buffers(page, bh);
-	init_page_buffers(page, bdev, block, size);
+	end_block = init_page_buffers(page, bdev, index << sizebits, size);
 	spin_unlock(&inode->i_mapping->private_lock);
-	return page;
-
+done:
+	ret = (block < end_block) ? 1 : -ENXIO;
 failed:
 	unlock_page(page);
 	page_cache_release(page);
-	return NULL;
+	return ret;
 }
 
 /*
@@ -999,7 +1007,6 @@ failed:
 static int
 grow_buffers(struct block_device *bdev, sector_t block, int size)
 {
-	struct page *page;
 	pgoff_t index;
 	int sizebits;
 
@@ -1023,22 +1030,14 @@ grow_buffers(struct block_device *bdev, sector_t block, int size)
 			bdevname(bdev, b));
 		return -EIO;
 	}
-	block = index << sizebits;
+
 	/* Create a page with the proper size buffers.. */
-	page = grow_dev_page(bdev, block, index, size);
-	if (!page)
-		return 0;
-	unlock_page(page);
-	page_cache_release(page);
-	return 1;
+	return grow_dev_page(bdev, block, index, size, sizebits);
 }
 
 static struct buffer_head *
 __getblk_slow(struct block_device *bdev, sector_t block, int size)
 {
-	int ret;
-	struct buffer_head *bh;
-
 	/* Size must be multiple of hard sectorsize */
 	if (unlikely(size & (bdev_logical_block_size(bdev)-1) ||
 			(size < 512 || size > PAGE_SIZE))) {
@@ -1051,21 +1050,20 @@ __getblk_slow(struct block_device *bdev, sector_t block, int size)
 		return NULL;
 	}
 
-retry:
-	bh = __find_get_block(bdev, block, size);
-	if (bh)
-		return bh;
+	for (;;) {
+		struct buffer_head *bh;
+		int ret;
 
-	ret = grow_buffers(bdev, block, size);
-	if (ret == 0) {
-		free_more_memory();
-		goto retry;
-	} else if (ret > 0) {
 		bh = __find_get_block(bdev, block, size);
 		if (bh)
 			return bh;
+
+		ret = grow_buffers(bdev, block, size);
+		if (ret < 0)
+			return NULL;
+		if (ret == 0)
+			free_more_memory();
 	}
-	return NULL;
 }
 
 /*
@@ -1321,10 +1319,6 @@ EXPORT_SYMBOL(__find_get_block);
  * which corresponds to the passed block_device, block and size. The
  * returned buffer has its reference count incremented.
  *
- * __getblk() cannot fail - it just keeps trying.  If you pass it an
- * illegal block number, __getblk() will happily return a buffer_head
- * which represents the non-existent block.  Very weird.
- *
  * __getblk() will lock up the machine if grow_dev_page's try_to_free_buffers()
  * attempt is failing.  FIXME, perhaps?
  */
diff --git a/fs/ceph/debugfs.c b/fs/ceph/debugfs.c
index fb962efdace..6d59006bfa2 100644
--- a/fs/ceph/debugfs.c
+++ b/fs/ceph/debugfs.c
@@ -201,6 +201,7 @@ int ceph_fs_debugfs_init(struct ceph_fs_client *fsc)
 	int err = -ENOMEM;
 
 	dout("ceph_fs_debugfs_init\n");
+	BUG_ON(!fsc->client->debugfs_dir);
 	fsc->debugfs_congestion_kb =
 		debugfs_create_file("writeback_congestion_kb",
 				    0600,
diff --git a/fs/ceph/inode.c b/fs/ceph/inode.c
index 9fff9f3b17e..4b5762ef7c2 100644
--- a/fs/ceph/inode.c
+++ b/fs/ceph/inode.c
@@ -992,11 +992,15 @@ int ceph_fill_trace(struct super_block *sb, struct ceph_mds_request *req,
 	if (rinfo->head->is_dentry) {
 		struct inode *dir = req->r_locked_dir;
 
-		err = fill_inode(dir, &rinfo->diri, rinfo->dirfrag,
-				 session, req->r_request_started, -1,
-				 &req->r_caps_reservation);
-		if (err < 0)
-			return err;
+		if (dir) {
+			err = fill_inode(dir, &rinfo->diri, rinfo->dirfrag,
+					 session, req->r_request_started, -1,
+					 &req->r_caps_reservation);
+			if (err < 0)
+				return err;
+		} else {
+			WARN_ON_ONCE(1);
+		}
 	}
 
 	/*
@@ -1004,6 +1008,7 @@ int ceph_fill_trace(struct super_block *sb, struct ceph_mds_request *req,
 	 * will have trouble splicing in the virtual snapdir later
 	 */
 	if (rinfo->head->is_dentry && !req->r_aborted &&
+	    req->r_locked_dir &&
 	    (rinfo->head->is_target || strncmp(req->r_dentry->d_name.name,
 					       fsc->mount_options->snapdir_name,
 					       req->r_dentry->d_name.len))) {
diff --git a/fs/ceph/ioctl.c b/fs/ceph/ioctl.c
index 8e3fb69fbe6..1396ceb4679 100644
--- a/fs/ceph/ioctl.c
+++ b/fs/ceph/ioctl.c
@@ -42,7 +42,8 @@ static long __validate_layout(struct ceph_mds_client *mdsc,
 	/* validate striping parameters */
 	if ((l->object_size & ~PAGE_MASK) ||
 	    (l->stripe_unit & ~PAGE_MASK) ||
-	    ((unsigned)l->object_size % (unsigned)l->stripe_unit))
+	    (l->stripe_unit != 0 &&
+	     ((unsigned)l->object_size % (unsigned)l->stripe_unit)))
 		return -EINVAL;
 
 	/* make sure it's a valid data pool */
diff --git a/fs/cifs/cifs_unicode.c b/fs/cifs/cifs_unicode.c
index 7dab9c04ad5..53cf2aabce8 100644
--- a/fs/cifs/cifs_unicode.c
+++ b/fs/cifs/cifs_unicode.c
@@ -328,7 +328,7 @@ cifsConvertToUTF16(__le16 *target, const char *source, int srclen,
 	}
 
 ctoUTF16_out:
-	return i;
+	return j;
 }
 
 #ifdef CONFIG_CIFS_SMB2
diff --git a/fs/cifs/cifssmb.c b/fs/cifs/cifssmb.c
index 074923ce593..f0cf934ba87 100644
--- a/fs/cifs/cifssmb.c
+++ b/fs/cifs/cifssmb.c
@@ -1576,9 +1576,14 @@ cifs_readv_callback(struct mid_q_entry *mid)
 		/* result already set, check signature */
 		if (server->sec_mode &
 		    (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED)) {
-			if (cifs_verify_signature(rdata->iov, rdata->nr_iov,
-					  server, mid->sequence_number + 1))
-				cERROR(1, "Unexpected SMB signature");
+			int rc = 0;
+
+			rc = cifs_verify_signature(rdata->iov, rdata->nr_iov,
+						   server,
+						   mid->sequence_number + 1);
+			if (rc)
+				cERROR(1, "SMB signature verification returned "
+				       "error = %d", rc);
 		}
 		/* FIXME: should this be counted toward the initiating task? */
 		task_io_account_read(rdata->bytes);
diff --git a/fs/cifs/dir.c b/fs/cifs/dir.c
index cbe709ad666..781025be48b 100644
--- a/fs/cifs/dir.c
+++ b/fs/cifs/dir.c
@@ -356,19 +356,12 @@ cifs_create_get_file_info:
 cifs_create_set_dentry:
 	if (rc != 0) {
 		cFYI(1, "Create worked, get_inode_info failed rc = %d", rc);
+		CIFSSMBClose(xid, tcon, *fileHandle);
 		goto out;
 	}
 	d_drop(direntry);
 	d_add(direntry, newinode);
 
-	/* ENOENT for create?  How weird... */
-	rc = -ENOENT;
-	if (!newinode) {
-		CIFSSMBClose(xid, tcon, *fileHandle);
-		goto out;
-	}
-	rc = 0;
-
 out:
 	kfree(buf);
 	kfree(full_path);
diff --git a/fs/cifs/file.c b/fs/cifs/file.c
index 9154192b068..71e9ad9f596 100644
--- a/fs/cifs/file.c
+++ b/fs/cifs/file.c
@@ -917,7 +917,7 @@ cifs_push_mandatory_locks(struct cifsFileInfo *cfile)
 	if (!buf) {
 		mutex_unlock(&cinode->lock_mutex);
 		free_xid(xid);
-		return rc;
+		return -ENOMEM;
 	}
 
 	for (i = 0; i < 2; i++) {
diff --git a/fs/cifs/inode.c b/fs/cifs/inode.c
index 7354877fa3b..cb79c7edecb 100644
--- a/fs/cifs/inode.c
+++ b/fs/cifs/inode.c
@@ -124,10 +124,10 @@ cifs_fattr_to_inode(struct inode *inode, struct cifs_fattr *fattr)
 {
 	struct cifsInodeInfo *cifs_i = CIFS_I(inode);
 	struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
-	unsigned long oldtime = cifs_i->time;
 
 	cifs_revalidate_cache(inode, fattr);
 
+	spin_lock(&inode->i_lock);
 	inode->i_atime = fattr->cf_atime;
 	inode->i_mtime = fattr->cf_mtime;
 	inode->i_ctime = fattr->cf_ctime;
@@ -148,9 +148,6 @@ cifs_fattr_to_inode(struct inode *inode, struct cifs_fattr *fattr)
 	else
 		cifs_i->time = jiffies;
 
-	cFYI(1, "inode 0x%p old_time=%ld new_time=%ld", inode,
-		 oldtime, cifs_i->time);
-
 	cifs_i->delete_pending = fattr->cf_flags & CIFS_FATTR_DELETE_PENDING;
 
 	cifs_i->server_eof = fattr->cf_eof;
@@ -158,7 +155,6 @@ cifs_fattr_to_inode(struct inode *inode, struct cifs_fattr *fattr)
 	 * Can't safely change the file size here if the client is writing to
 	 * it due to potential races.
 	 */
-	spin_lock(&inode->i_lock);
 	if (is_size_safe_to_change(cifs_i, fattr->cf_eof)) {
 		i_size_write(inode, fattr->cf_eof);
 
@@ -859,12 +855,14 @@ struct inode *cifs_root_iget(struct super_block *sb)
 
 	if (rc && tcon->ipc) {
 		cFYI(1, "ipc connection - fake read inode");
+		spin_lock(&inode->i_lock);
 		inode->i_mode |= S_IFDIR;
 		set_nlink(inode, 2);
 		inode->i_op = &cifs_ipc_inode_ops;
 		inode->i_fop = &simple_dir_operations;
 		inode->i_uid = cifs_sb->mnt_uid;
 		inode->i_gid = cifs_sb->mnt_gid;
+		spin_unlock(&inode->i_lock);
 	} else if (rc) {
 		iget_failed(inode);
 		inode = ERR_PTR(rc);
@@ -1110,6 +1108,15 @@ undo_setattr:
 	goto out_close;
 }
 
+/* copied from fs/nfs/dir.c with small changes */
+static void
+cifs_drop_nlink(struct inode *inode)
+{
+	spin_lock(&inode->i_lock);
+	if (inode->i_nlink > 0)
+		drop_nlink(inode);
+	spin_unlock(&inode->i_lock);
+}
 
 /*
  * If dentry->d_inode is null (usually meaning the cached dentry
@@ -1166,13 +1173,13 @@ retry_std_delete:
 psx_del_no_retry:
 	if (!rc) {
 		if (inode)
-			drop_nlink(inode);
+			cifs_drop_nlink(inode);
 	} else if (rc == -ENOENT) {
 		d_drop(dentry);
 	} else if (rc == -ETXTBSY) {
 		rc = cifs_rename_pending_delete(full_path, dentry, xid);
 		if (rc == 0)
-			drop_nlink(inode);
+			cifs_drop_nlink(inode);
 	} else if ((rc == -EACCES) && (dosattr == 0) && inode) {
 		attrs = kzalloc(sizeof(*attrs), GFP_KERNEL);
 		if (attrs == NULL) {
@@ -1241,9 +1248,10 @@ cifs_mkdir_qinfo(struct inode *inode, struct dentry *dentry, umode_t mode,
 	 * setting nlink not necessary except in cases where we failed to get it
 	 * from the server or was set bogus
 	 */
+	spin_lock(&dentry->d_inode->i_lock);
 	if ((dentry->d_inode) && (dentry->d_inode->i_nlink < 2))
 		set_nlink(dentry->d_inode, 2);
-
+	spin_unlock(&dentry->d_inode->i_lock);
 	mode &= ~current_umask();
 	/* must turn on setgid bit if parent dir has it */
 	if (inode->i_mode & S_ISGID)
diff --git a/fs/cifs/link.c b/fs/cifs/link.c
index 09e4b3ae456..e6ce3b11287 100644
--- a/fs/cifs/link.c
+++ b/fs/cifs/link.c
@@ -433,7 +433,9 @@ cifs_hardlink(struct dentry *old_file, struct inode *inode,
 	if (old_file->d_inode) {
 		cifsInode = CIFS_I(old_file->d_inode);
 		if (rc == 0) {
+			spin_lock(&old_file->d_inode->i_lock);
 			inc_nlink(old_file->d_inode);
+			spin_unlock(&old_file->d_inode->i_lock);
 /* BB should we make this contingent on superblock flag NOATIME? */
 /*			old_file->d_inode->i_ctime = CURRENT_TIME;*/
 			/* parent dir timestamps will update from srv
diff --git a/fs/cifs/smb2misc.c b/fs/cifs/smb2misc.c
index a4ff5d54755..e4d3b996416 100644
--- a/fs/cifs/smb2misc.c
+++ b/fs/cifs/smb2misc.c
@@ -52,7 +52,8 @@ check_smb2_hdr(struct smb2_hdr *hdr, __u64 mid)
 			cERROR(1, "Bad protocol string signature header %x",
 				  *(unsigned int *) hdr->ProtocolId);
 		if (mid != hdr->MessageId)
-			cERROR(1, "Mids do not match");
+			cERROR(1, "Mids do not match: %llu and %llu", mid,
+				  hdr->MessageId);
 	}
 	cERROR(1, "Bad SMB detected. The Mid=%llu", hdr->MessageId);
 	return 1;
@@ -107,7 +108,7 @@ smb2_check_message(char *buf, unsigned int length)
 	 * ie Validate the wct via smb2_struct_sizes table above
 	 */
 
-	if (length < 2 + sizeof(struct smb2_hdr)) {
+	if (length < sizeof(struct smb2_pdu)) {
 		if ((length >= sizeof(struct smb2_hdr)) && (hdr->Status != 0)) {
 			pdu->StructureSize2 = 0;
 			/*
@@ -121,15 +122,15 @@ smb2_check_message(char *buf, unsigned int length)
 		return 1;
 	}
 	if (len > CIFSMaxBufSize + MAX_SMB2_HDR_SIZE - 4) {
-		cERROR(1, "SMB length greater than maximum, mid=%lld", mid);
+		cERROR(1, "SMB length greater than maximum, mid=%llu", mid);
 		return 1;
 	}
 
 	if (check_smb2_hdr(hdr, mid))
 		return 1;
 
-	if (hdr->StructureSize != SMB2_HEADER_SIZE) {
-		cERROR(1, "Illegal structure size %d",
+	if (hdr->StructureSize != SMB2_HEADER_STRUCTURE_SIZE) {
+		cERROR(1, "Illegal structure size %u",
 			  le16_to_cpu(hdr->StructureSize));
 		return 1;
 	}
@@ -161,8 +162,9 @@ smb2_check_message(char *buf, unsigned int length)
 	if (4 + len != clc_len) {
 		cFYI(1, "Calculated size %u length %u mismatch mid %llu",
 			clc_len, 4 + len, mid);
-		if (clc_len == 4 + len + 1) /* BB FIXME (fix samba) */
-			return 0; /* BB workaround Samba 3 bug SessSetup rsp */
+		/* server can return one byte more */
+		if (clc_len == 4 + len + 1)
+			return 0;
 		return 1;
 	}
 	return 0;
diff --git a/fs/cifs/smb2pdu.h b/fs/cifs/smb2pdu.h
index f37a1b41b40..15dc8eea827 100644
--- a/fs/cifs/smb2pdu.h
+++ b/fs/cifs/smb2pdu.h
@@ -87,10 +87,6 @@
 
 #define SMB2_PROTO_NUMBER __constant_cpu_to_le32(0x424d53fe)
 
-#define SMB2_HEADER_SIZE __constant_le16_to_cpu(64)
-
-#define SMB2_ERROR_STRUCTURE_SIZE2 __constant_le16_to_cpu(9)
-
 /*
  * SMB2 Header Definition
  *
@@ -99,6 +95,9 @@
  * "PDU" :  "Protocol Data Unit" (ie a network "frame")
  *
  */
+
+#define SMB2_HEADER_STRUCTURE_SIZE __constant_cpu_to_le16(64)
+
 struct smb2_hdr {
 	__be32 smb2_buf_length;	/* big endian on wire */
 				/* length is only two or three bytes - with
@@ -140,6 +139,9 @@ struct smb2_pdu {
  *  command code name for the struct. Note that structures must be packed.
  *
  */
+
+#define SMB2_ERROR_STRUCTURE_SIZE2 __constant_cpu_to_le16(9)
+
 struct smb2_err_rsp {
 	struct smb2_hdr hdr;
 	__le16 StructureSize;
diff --git a/fs/cifs/transport.c b/fs/cifs/transport.c
index 83867ef348d..d9b639b95fa 100644
--- a/fs/cifs/transport.c
+++ b/fs/cifs/transport.c
@@ -503,13 +503,16 @@ cifs_check_receive(struct mid_q_entry *mid, struct TCP_Server_Info *server,
 	/* convert the length into a more usable form */
 	if (server->sec_mode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED)) {
 		struct kvec iov;
+		int rc = 0;
 
 		iov.iov_base = mid->resp_buf;
 		iov.iov_len = len;
 		/* FIXME: add code to kill session */
-		if (cifs_verify_signature(&iov, 1, server,
-					  mid->sequence_number + 1) != 0)
-			cERROR(1, "Unexpected SMB signature");
+		rc = cifs_verify_signature(&iov, 1, server,
+					   mid->sequence_number + 1);
+		if (rc)
+			cERROR(1, "SMB signature verification returned error = "
+			       "%d", rc);
 	}
 
 	/* BB special case reconnect tid and uid here? */
diff --git a/fs/compat.c b/fs/compat.c
index 6161255fac4..1bdb350ea5d 100644
--- a/fs/compat.c
+++ b/fs/compat.c
@@ -1155,11 +1155,14 @@ compat_sys_readv(unsigned long fd, const struct compat_iovec __user *vec,
 	struct file *file;
 	int fput_needed;
 	ssize_t ret;
+	loff_t pos;
 
 	file = fget_light(fd, &fput_needed);
 	if (!file)
 		return -EBADF;
-	ret = compat_readv(file, vec, vlen, &file->f_pos);
+	pos = file->f_pos;
+	ret = compat_readv(file, vec, vlen, &pos);
+	file->f_pos = pos;
 	fput_light(file, fput_needed);
 	return ret;
 }
@@ -1221,11 +1224,14 @@ compat_sys_writev(unsigned long fd, const struct compat_iovec __user *vec,
 	struct file *file;
 	int fput_needed;
 	ssize_t ret;
+	loff_t pos;
 
 	file = fget_light(fd, &fput_needed);
 	if (!file)
 		return -EBADF;
-	ret = compat_writev(file, vec, vlen, &file->f_pos);
+	pos = file->f_pos;
+	ret = compat_writev(file, vec, vlen, &pos);
+	file->f_pos = pos;
 	fput_light(file, fput_needed);
 	return ret;
 }
diff --git a/fs/dcache.c b/fs/dcache.c
index 8086636bf79..16521a9f203 100644
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -389,7 +389,7 @@ static struct dentry *d_kill(struct dentry *dentry, struct dentry *parent)
 	 * Inform try_to_ascend() that we are no longer attached to the
 	 * dentry tree
 	 */
-	dentry->d_flags |= DCACHE_DISCONNECTED;
+	dentry->d_flags |= DCACHE_DENTRY_KILLED;
 	if (parent)
 		spin_unlock(&parent->d_lock);
 	dentry_iput(dentry);
@@ -1048,7 +1048,7 @@ static struct dentry *try_to_ascend(struct dentry *old, int locked, unsigned seq
 	 * or deletion
 	 */
 	if (new != old->d_parent ||
-		 (old->d_flags & DCACHE_DISCONNECTED) ||
+		 (old->d_flags & DCACHE_DENTRY_KILLED) ||
 		 (!locked && read_seqretry(&rename_lock, seq))) {
 		spin_unlock(&new->d_lock);
 		new = NULL;
diff --git a/fs/debugfs/file.c b/fs/debugfs/file.c
index 2340f6978d6..c5ca6ae5a30 100644
--- a/fs/debugfs/file.c
+++ b/fs/debugfs/file.c
@@ -526,73 +526,51 @@ struct array_data {
 	u32 elements;
 };
 
-static int u32_array_open(struct inode *inode, struct file *file)
-{
-	file->private_data = NULL;
-	return nonseekable_open(inode, file);
-}
-
-static size_t format_array(char *buf, size_t bufsize, const char *fmt,
-			   u32 *array, u32 array_size)
+static size_t u32_format_array(char *buf, size_t bufsize,
+			       u32 *array, int array_size)
 {
 	size_t ret = 0;
-	u32 i;
 
-	for (i = 0; i < array_size; i++) {
+	while (--array_size >= 0) {
 		size_t len;
+		char term = array_size ? ' ' : '\n';
 
-		len = snprintf(buf, bufsize, fmt, array[i]);
-		len++;	/* ' ' or '\n' */
+		len = snprintf(buf, bufsize, "%u%c", *array++, term);
 		ret += len;
 
-		if (buf) {
-			buf += len;
-			bufsize -= len;
-			buf[-1] = (i == array_size-1) ? '\n' : ' ';
-		}
+		buf += len;
+		bufsize -= len;
 	}
-
-	ret++;		/* \0 */
-	if (buf)
-		*buf = '\0';
-
 	return ret;
 }
 
-static char *format_array_alloc(const char *fmt, u32 *array,
-						u32 array_size)
+static int u32_array_open(struct inode *inode, struct file *file)
 {
-	size_t len = format_array(NULL, 0, fmt, array, array_size);
-	char *ret;
-
-	ret = kmalloc(len, GFP_KERNEL);
-	if (ret == NULL)
-		return NULL;
+	struct array_data *data = inode->i_private;
+	int size, elements = data->elements;
+	char *buf;
+
+	/*
+	 * Max size:
+	 *  - 10 digits + ' '/'\n' = 11 bytes per number
+	 *  - terminating NUL character
+	 */
+	size = elements*11;
+	buf = kmalloc(size+1, GFP_KERNEL);
+	if (!buf)
+		return -ENOMEM;
+	buf[size] = 0;
+
+	file->private_data = buf;
+	u32_format_array(buf, size, data->array, data->elements);
 
-	format_array(ret, len, fmt, array, array_size);
-	return ret;
+	return nonseekable_open(inode, file);
 }
 
 static ssize_t u32_array_read(struct file *file, char __user *buf, size_t len,
 			      loff_t *ppos)
 {
-	struct inode *inode = file->f_path.dentry->d_inode;
-	struct array_data *data = inode->i_private;
-	size_t size;
-
-	if (*ppos == 0) {
-		if (file->private_data) {
-			kfree(file->private_data);
-			file->private_data = NULL;
-		}
-
-		file->private_data = format_array_alloc("%u", data->array,
-							      data->elements);
-	}
-
-	size = 0;
-	if (file->private_data)
-		size = strlen(file->private_data);
+	size_t size = strlen(file->private_data);
 
 	return simple_read_from_buffer(buf, len, ppos,
 					file->private_data, size);
diff --git a/fs/direct-io.c b/fs/direct-io.c
index 1faf4cb56f3..f86c720dba0 100644
--- a/fs/direct-io.c
+++ b/fs/direct-io.c
@@ -1062,6 +1062,7 @@ do_blockdev_direct_IO(int rw, struct kiocb *iocb, struct inode *inode,
 	unsigned long user_addr;
 	size_t bytes;
 	struct buffer_head map_bh = { 0, };
+	struct blk_plug plug;
 
 	if (rw & WRITE)
 		rw = WRITE_ODIRECT;
@@ -1177,6 +1178,8 @@ do_blockdev_direct_IO(int rw, struct kiocb *iocb, struct inode *inode,
 				PAGE_SIZE - user_addr / PAGE_SIZE);
 	}
 
+	blk_start_plug(&plug);
+
 	for (seg = 0; seg < nr_segs; seg++) {
 		user_addr = (unsigned long)iov[seg].iov_base;
 		sdio.size += bytes = iov[seg].iov_len;
@@ -1235,6 +1238,8 @@ do_blockdev_direct_IO(int rw, struct kiocb *iocb, struct inode *inode,
 	if (sdio.bio)
 		dio_bio_submit(dio, &sdio);
 
+	blk_finish_plug(&plug);
+
 	/*
 	 * It is possible that, we return short IO due to end of file.
 	 * In that case, we need to release all the pages we got hold on.
diff --git a/fs/ecryptfs/file.c b/fs/ecryptfs/file.c
index 44ce5c6a541..d45ba456812 100644
--- a/fs/ecryptfs/file.c
+++ b/fs/ecryptfs/file.c
@@ -275,8 +275,14 @@ out:
 
 static int ecryptfs_flush(struct file *file, fl_owner_t td)
 {
-	return file->f_mode & FMODE_WRITE
-	       ? filemap_write_and_wait(file->f_mapping) : 0;
+	struct file *lower_file = ecryptfs_file_to_lower(file);
+
+	if (lower_file->f_op && lower_file->f_op->flush) {
+		filemap_write_and_wait(file->f_mapping);
+		return lower_file->f_op->flush(lower_file, td);
+	}
+
+	return 0;
 }
 
 static int ecryptfs_release(struct inode *inode, struct file *file)
diff --git a/fs/ecryptfs/inode.c b/fs/ecryptfs/inode.c
index 534b129ea67..cc7709e7c50 100644
--- a/fs/ecryptfs/inode.c
+++ b/fs/ecryptfs/inode.c
@@ -619,6 +619,7 @@ ecryptfs_rename(struct inode *old_dir, struct dentry *old_dentry,
 	struct dentry *lower_old_dir_dentry;
 	struct dentry *lower_new_dir_dentry;
 	struct dentry *trap = NULL;
+	struct inode *target_inode;
 
 	lower_old_dentry = ecryptfs_dentry_to_lower(old_dentry);
 	lower_new_dentry = ecryptfs_dentry_to_lower(new_dentry);
@@ -626,6 +627,7 @@ ecryptfs_rename(struct inode *old_dir, struct dentry *old_dentry,
 	dget(lower_new_dentry);
 	lower_old_dir_dentry = dget_parent(lower_old_dentry);
 	lower_new_dir_dentry = dget_parent(lower_new_dentry);
+	target_inode = new_dentry->d_inode;
 	trap = lock_rename(lower_old_dir_dentry, lower_new_dir_dentry);
 	/* source should not be ancestor of target */
 	if (trap == lower_old_dentry) {
@@ -641,6 +643,9 @@ ecryptfs_rename(struct inode *old_dir, struct dentry *old_dentry,
 			lower_new_dir_dentry->d_inode, lower_new_dentry);
 	if (rc)
 		goto out_lock;
+	if (target_inode)
+		fsstack_copy_attr_all(target_inode,
+				      ecryptfs_inode_to_lower(target_inode));
 	fsstack_copy_attr_all(new_dir, lower_new_dir_dentry->d_inode);
 	if (new_dir != old_dir)
 		fsstack_copy_attr_all(old_dir, lower_old_dir_dentry->d_inode);
diff --git a/fs/ecryptfs/main.c b/fs/ecryptfs/main.c
index 2768138eefe..9b627c15010 100644
--- a/fs/ecryptfs/main.c
+++ b/fs/ecryptfs/main.c
@@ -162,6 +162,7 @@ void ecryptfs_put_lower_file(struct inode *inode)
 	inode_info = ecryptfs_inode_to_private(inode);
 	if (atomic_dec_and_mutex_lock(&inode_info->lower_file_count,
 				      &inode_info->lower_file_mutex)) {
+		filemap_write_and_wait(inode->i_mapping);
 		fput(inode_info->lower_file);
 		inode_info->lower_file = NULL;
 		mutex_unlock(&inode_info->lower_file_mutex);
diff --git a/fs/eventpoll.c b/fs/eventpoll.c
index 1c8b5567080..eedec84c180 100644
--- a/fs/eventpoll.c
+++ b/fs/eventpoll.c
@@ -1654,8 +1654,8 @@ SYSCALL_DEFINE1(epoll_create1, int, flags)
 		error = PTR_ERR(file);
 		goto out_free_fd;
 	}
-	fd_install(fd, file);
 	ep->file = file;
+	fd_install(fd, file);
 	return fd;
 
 out_free_fd:
diff --git a/fs/ext3/inode.c b/fs/ext3/inode.c
index a07597307fd..ff574b4e345 100644
--- a/fs/ext3/inode.c
+++ b/fs/ext3/inode.c
@@ -3072,6 +3072,8 @@ static int ext3_do_update_inode(handle_t *handle,
 	struct ext3_inode_info *ei = EXT3_I(inode);
 	struct buffer_head *bh = iloc->bh;
 	int err = 0, rc, block;
+	int need_datasync = 0;
+	__le32 disksize;
 	uid_t i_uid;
 	gid_t i_gid;
 
@@ -3113,7 +3115,11 @@ again:
 		raw_inode->i_gid_high = 0;
 	}
 	raw_inode->i_links_count = cpu_to_le16(inode->i_nlink);
-	raw_inode->i_size = cpu_to_le32(ei->i_disksize);
+	disksize = cpu_to_le32(ei->i_disksize);
+	if (disksize != raw_inode->i_size) {
+		need_datasync = 1;
+		raw_inode->i_size = disksize;
+	}
 	raw_inode->i_atime = cpu_to_le32(inode->i_atime.tv_sec);
 	raw_inode->i_ctime = cpu_to_le32(inode->i_ctime.tv_sec);
 	raw_inode->i_mtime = cpu_to_le32(inode->i_mtime.tv_sec);
@@ -3129,8 +3135,11 @@ again:
 	if (!S_ISREG(inode->i_mode)) {
 		raw_inode->i_dir_acl = cpu_to_le32(ei->i_dir_acl);
 	} else {
-		raw_inode->i_size_high =
-			cpu_to_le32(ei->i_disksize >> 32);
+		disksize = cpu_to_le32(ei->i_disksize >> 32);
+		if (disksize != raw_inode->i_size_high) {
+			raw_inode->i_size_high = disksize;
+			need_datasync = 1;
+		}
 		if (ei->i_disksize > 0x7fffffffULL) {
 			struct super_block *sb = inode->i_sb;
 			if (!EXT3_HAS_RO_COMPAT_FEATURE(sb,
@@ -3183,6 +3192,8 @@ again:
 	ext3_clear_inode_state(inode, EXT3_STATE_NEW);
 
 	atomic_set(&ei->i_sync_tid, handle->h_transaction->t_tid);
+	if (need_datasync)
+		atomic_set(&ei->i_datasync_tid, handle->h_transaction->t_tid);
 out_brelse:
 	brelse (bh);
 	ext3_std_error(inode->i_sb, err);
diff --git a/fs/ext4/balloc.c b/fs/ext4/balloc.c
index d23b31ca9d7..1b5089067d0 100644
--- a/fs/ext4/balloc.c
+++ b/fs/ext4/balloc.c
@@ -280,14 +280,18 @@ struct ext4_group_desc * ext4_get_group_desc(struct super_block *sb,
 	return desc;
 }
 
-static int ext4_valid_block_bitmap(struct super_block *sb,
-				   struct ext4_group_desc *desc,
-				   unsigned int block_group,
-				   struct buffer_head *bh)
+/*
+ * Return the block number which was discovered to be invalid, or 0 if
+ * the block bitmap is valid.
+ */
+static ext4_fsblk_t ext4_valid_block_bitmap(struct super_block *sb,
+					    struct ext4_group_desc *desc,
+					    unsigned int block_group,
+					    struct buffer_head *bh)
 {
 	ext4_grpblk_t offset;
 	ext4_grpblk_t next_zero_bit;
-	ext4_fsblk_t bitmap_blk;
+	ext4_fsblk_t blk;
 	ext4_fsblk_t group_first_block;
 
 	if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) {
@@ -297,37 +301,33 @@ static int ext4_valid_block_bitmap(struct super_block *sb,
 		 * or it has to also read the block group where the bitmaps
 		 * are located to verify they are set.
 		 */
-		return 1;
+		return 0;
 	}
 	group_first_block = ext4_group_first_block_no(sb, block_group);
 
 	/* check whether block bitmap block number is set */
-	bitmap_blk = ext4_block_bitmap(sb, desc);
-	offset = bitmap_blk - group_first_block;
+	blk = ext4_block_bitmap(sb, desc);
+	offset = blk - group_first_block;
 	if (!ext4_test_bit(offset, bh->b_data))
 		/* bad block bitmap */
-		goto err_out;
+		return blk;
 
 	/* check whether the inode bitmap block number is set */
-	bitmap_blk = ext4_inode_bitmap(sb, desc);
-	offset = bitmap_blk - group_first_block;
+	blk = ext4_inode_bitmap(sb, desc);
+	offset = blk - group_first_block;
 	if (!ext4_test_bit(offset, bh->b_data))
 		/* bad block bitmap */
-		goto err_out;
+		return blk;
 
 	/* check whether the inode table block number is set */
-	bitmap_blk = ext4_inode_table(sb, desc);
-	offset = bitmap_blk - group_first_block;
+	blk = ext4_inode_table(sb, desc);
+	offset = blk - group_first_block;
 	next_zero_bit = ext4_find_next_zero_bit(bh->b_data,
 				offset + EXT4_SB(sb)->s_itb_per_group,
 				offset);
-	if (next_zero_bit >= offset + EXT4_SB(sb)->s_itb_per_group)
-		/* good bitmap for inode tables */
-		return 1;
-
-err_out:
-	ext4_error(sb, "Invalid block bitmap - block_group = %d, block = %llu",
-			block_group, bitmap_blk);
+	if (next_zero_bit < offset + EXT4_SB(sb)->s_itb_per_group)
+		/* bad bitmap for inode tables */
+		return blk;
 	return 0;
 }
 
@@ -336,14 +336,26 @@ void ext4_validate_block_bitmap(struct super_block *sb,
 			       unsigned int block_group,
 			       struct buffer_head *bh)
 {
+	ext4_fsblk_t	blk;
+
 	if (buffer_verified(bh))
 		return;
 
 	ext4_lock_group(sb, block_group);
-	if (ext4_valid_block_bitmap(sb, desc, block_group, bh) &&
-	    ext4_block_bitmap_csum_verify(sb, block_group, desc, bh,
-					  EXT4_BLOCKS_PER_GROUP(sb) / 8))
-		set_buffer_verified(bh);
+	blk = ext4_valid_block_bitmap(sb, desc, block_group, bh);
+	if (unlikely(blk != 0)) {
+		ext4_unlock_group(sb, block_group);
+		ext4_error(sb, "bg %u: block %llu: invalid block bitmap",
+			   block_group, blk);
+		return;
+	}
+	if (unlikely(!ext4_block_bitmap_csum_verify(sb, block_group,
+			desc, bh, EXT4_BLOCKS_PER_GROUP(sb) / 8))) {
+		ext4_unlock_group(sb, block_group);
+		ext4_error(sb, "bg %u: bad block bitmap checksum", block_group);
+		return;
+	}
+	set_buffer_verified(bh);
 	ext4_unlock_group(sb, block_group);
 }
 
diff --git a/fs/ext4/bitmap.c b/fs/ext4/bitmap.c
index f8716eab999..5c2d1813ebe 100644
--- a/fs/ext4/bitmap.c
+++ b/fs/ext4/bitmap.c
@@ -79,7 +79,6 @@ int ext4_block_bitmap_csum_verify(struct super_block *sb, ext4_group_t group,
 	if (provided == calculated)
 		return 1;
 
-	ext4_error(sb, "Bad block bitmap checksum: block_group = %u", group);
 	return 0;
 }
 
diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
index cd0c7ed0677..aabbb3f5368 100644
--- a/fs/ext4/extents.c
+++ b/fs/ext4/extents.c
@@ -2662,6 +2662,7 @@ cont:
 		}
 		path[0].p_depth = depth;
 		path[0].p_hdr = ext_inode_hdr(inode);
+		i = 0;
 
 		if (ext4_ext_check(inode, path[0].p_hdr, depth)) {
 			err = -EIO;
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 3e0851e4f46..c6e0cb3d1f4 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -948,6 +948,7 @@ static struct inode *ext4_alloc_inode(struct super_block *sb)
 	ei->i_reserved_meta_blocks = 0;
 	ei->i_allocated_meta_blocks = 0;
 	ei->i_da_metadata_calc_len = 0;
+	ei->i_da_metadata_calc_last_lblock = 0;
 	spin_lock_init(&(ei->i_block_reservation_lock));
 #ifdef CONFIG_QUOTA
 	ei->i_reserved_quota = 0;
@@ -3108,6 +3109,10 @@ static int count_overhead(struct super_block *sb, ext4_group_t grp,
 	ext4_group_t		i, ngroups = ext4_get_groups_count(sb);
 	int			s, j, count = 0;
 
+	if (!EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_BIGALLOC))
+		return (ext4_bg_has_super(sb, grp) + ext4_bg_num_gdb(sb, grp) +
+			sbi->s_itb_per_group + 2);
+
 	first_block = le32_to_cpu(sbi->s_es->s_first_data_block) +
 		(grp * EXT4_BLOCKS_PER_GROUP(sb));
 	last_block = first_block + EXT4_BLOCKS_PER_GROUP(sb) - 1;
@@ -4419,6 +4424,7 @@ static void ext4_clear_journal_err(struct super_block *sb,
 		ext4_commit_super(sb, 1);
 
 		jbd2_journal_clear_err(journal);
+		jbd2_journal_update_sb_errno(journal);
 	}
 }
 
diff --git a/fs/fuse/control.c b/fs/fuse/control.c
index 03ff5b1eba9..75a20c092dd 100644
--- a/fs/fuse/control.c
+++ b/fs/fuse/control.c
@@ -117,7 +117,7 @@ static ssize_t fuse_conn_max_background_write(struct file *file,
 					      const char __user *buf,
 					      size_t count, loff_t *ppos)
 {
-	unsigned val;
+	unsigned uninitialized_var(val);
 	ssize_t ret;
 
 	ret = fuse_conn_limit_write(file, buf, count, ppos, &val,
@@ -154,7 +154,7 @@ static ssize_t fuse_conn_congestion_threshold_write(struct file *file,
 						    const char __user *buf,
 						    size_t count, loff_t *ppos)
 {
-	unsigned val;
+	unsigned uninitialized_var(val);
 	ssize_t ret;
 
 	ret = fuse_conn_limit_write(file, buf, count, ppos, &val,
diff --git a/fs/fuse/cuse.c b/fs/fuse/cuse.c
index 3426521f320..ee8d5504229 100644
--- a/fs/fuse/cuse.c
+++ b/fs/fuse/cuse.c
@@ -396,7 +396,7 @@ err_device:
 err_region:
 	unregister_chrdev_region(devt, 1);
 err:
-	fc->conn_error = 1;
+	fuse_conn_kill(fc);
 	goto out;
 }
 
@@ -532,8 +532,6 @@ static int cuse_channel_release(struct inode *inode, struct file *file)
 		cdev_del(cc->cdev);
 	}
 
-	/* kill connection and shutdown channel */
-	fuse_conn_kill(&cc->fc);
 	rc = fuse_dev_release(inode, file);	/* puts the base reference */
 
 	return rc;
diff --git a/fs/fuse/dev.c b/fs/fuse/dev.c
index 7df2b5e8fbe..f4246cfc8d8 100644
--- a/fs/fuse/dev.c
+++ b/fs/fuse/dev.c
@@ -1576,6 +1576,7 @@ static int fuse_retrieve(struct fuse_conn *fc, struct inode *inode,
 		req->pages[req->num_pages] = page;
 		req->num_pages++;
 
+		offset = 0;
 		num -= this_num;
 		total_len += this_num;
 		index++;
diff --git a/fs/fuse/dir.c b/fs/fuse/dir.c
index 8964cf3999b..324bc085053 100644
--- a/fs/fuse/dir.c
+++ b/fs/fuse/dir.c
@@ -383,6 +383,9 @@ static int fuse_create_open(struct inode *dir, struct dentry *entry,
 	struct fuse_entry_out outentry;
 	struct fuse_file *ff;
 
+	/* Userspace expects S_IFREG in create mode */
+	BUG_ON((mode & S_IFMT) != S_IFREG);
+
 	forget = fuse_alloc_forget();
 	err = -ENOMEM;
 	if (!forget)
diff --git a/fs/fuse/inode.c b/fs/fuse/inode.c
index ce0a2838ccd..fca222dabe3 100644
--- a/fs/fuse/inode.c
+++ b/fs/fuse/inode.c
@@ -367,11 +367,6 @@ void fuse_conn_kill(struct fuse_conn *fc)
 	wake_up_all(&fc->waitq);
 	wake_up_all(&fc->blocked_waitq);
 	wake_up_all(&fc->reserved_req_waitq);
-	mutex_lock(&fuse_mutex);
-	list_del(&fc->entry);
-	fuse_ctl_remove_conn(fc);
-	mutex_unlock(&fuse_mutex);
-	fuse_bdi_destroy(fc);
 }
 EXPORT_SYMBOL_GPL(fuse_conn_kill);
 
@@ -380,7 +375,14 @@ static void fuse_put_super(struct super_block *sb)
 	struct fuse_conn *fc = get_fuse_conn_super(sb);
 
 	fuse_send_destroy(fc);
+
 	fuse_conn_kill(fc);
+	mutex_lock(&fuse_mutex);
+	list_del(&fc->entry);
+	fuse_ctl_remove_conn(fc);
+	mutex_unlock(&fuse_mutex);
+	fuse_bdi_destroy(fc);
+
 	fuse_conn_put(fc);
 }
 
diff --git a/fs/gfs2/file.c b/fs/gfs2/file.c
index d1d791ef38d..382000ffac1 100644
--- a/fs/gfs2/file.c
+++ b/fs/gfs2/file.c
@@ -323,6 +323,29 @@ static long gfs2_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
 }
 
 /**
+ * gfs2_size_hint - Give a hint to the size of a write request
+ * @file: The struct file
+ * @offset: The file offset of the write
+ * @size: The length of the write
+ *
+ * When we are about to do a write, this function records the total
+ * write size in order to provide a suitable hint to the lower layers
+ * about how many blocks will be required.
+ *
+ */
+
+static void gfs2_size_hint(struct file *filep, loff_t offset, size_t size)
+{
+	struct inode *inode = filep->f_dentry->d_inode;
+	struct gfs2_sbd *sdp = GFS2_SB(inode);
+	struct gfs2_inode *ip = GFS2_I(inode);
+	size_t blks = (size + sdp->sd_sb.sb_bsize - 1) >> sdp->sd_sb.sb_bsize_shift;
+	int hint = min_t(size_t, INT_MAX, blks);
+
+	atomic_set(&ip->i_res->rs_sizehint, hint);
+}
+
+/**
  * gfs2_allocate_page_backing - Use bmap to allocate blocks
  * @page: The (locked) page to allocate backing for
  *
@@ -382,8 +405,7 @@ static int gfs2_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf)
 	if (ret)
 		return ret;
 
-	atomic_set(&ip->i_res->rs_sizehint,
-		   PAGE_CACHE_SIZE >> sdp->sd_sb.sb_bsize_shift);
+	gfs2_size_hint(vma->vm_file, pos, PAGE_CACHE_SIZE);
 
 	gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh);
 	ret = gfs2_glock_nq(&gh);
@@ -663,7 +685,8 @@ static ssize_t gfs2_file_aio_write(struct kiocb *iocb, const struct iovec *iov,
 	if (ret)
 		return ret;
 
-	atomic_set(&ip->i_res->rs_sizehint, writesize >> sdp->sd_sb.sb_bsize_shift);
+	gfs2_size_hint(file, pos, writesize);
+
 	if (file->f_flags & O_APPEND) {
 		struct gfs2_holder gh;
 
@@ -789,7 +812,7 @@ static long gfs2_fallocate(struct file *file, int mode, loff_t offset,
 	if (unlikely(error))
 		goto out_uninit;
 
-	atomic_set(&ip->i_res->rs_sizehint, len >> sdp->sd_sb.sb_bsize_shift);
+	gfs2_size_hint(file, offset, len);
 
 	while (len > 0) {
 		if (len < bytes)
diff --git a/fs/gfs2/inode.c b/fs/gfs2/inode.c
index 4ce22e54730..753af3d86bb 100644
--- a/fs/gfs2/inode.c
+++ b/fs/gfs2/inode.c
@@ -1722,7 +1722,9 @@ static int gfs2_setxattr(struct dentry *dentry, const char *name,
 	gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh);
 	ret = gfs2_glock_nq(&gh);
 	if (ret == 0) {
-		ret = generic_setxattr(dentry, name, data, size, flags);
+		ret = gfs2_rs_alloc(ip);
+		if (ret == 0)
+			ret = generic_setxattr(dentry, name, data, size, flags);
 		gfs2_glock_dq(&gh);
 	}
 	gfs2_holder_uninit(&gh);
@@ -1757,7 +1759,9 @@ static int gfs2_removexattr(struct dentry *dentry, const char *name)
 	gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh);
 	ret = gfs2_glock_nq(&gh);
 	if (ret == 0) {
-		ret = generic_removexattr(dentry, name);
+		ret = gfs2_rs_alloc(ip);
+		if (ret == 0)
+			ret = generic_removexattr(dentry, name);
 		gfs2_glock_dq(&gh);
 	}
 	gfs2_holder_uninit(&gh);
diff --git a/fs/gfs2/rgrp.c b/fs/gfs2/rgrp.c
index 4d34887a601..c9ed814eeb6 100644
--- a/fs/gfs2/rgrp.c
+++ b/fs/gfs2/rgrp.c
@@ -1961,7 +1961,7 @@ static void gfs2_rgrp_error(struct gfs2_rgrpd *rgd)
  * @dinode: 1 if this block is a dinode block, otherwise data block
  * @nblocks: desired extent length
  *
- * Lay claim to previously allocated block reservation blocks.
+ * Lay claim to previously reserved blocks.
  * Returns: Starting block number of the blocks claimed.
  * Sets *nblocks to the actual extent length allocated.
  */
@@ -1970,19 +1970,17 @@ static u64 claim_reserved_blks(struct gfs2_inode *ip, bool dinode,
 {
 	struct gfs2_blkreserv *rs = ip->i_res;
 	struct gfs2_rgrpd *rgd = rs->rs_rgd;
-	struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
 	struct gfs2_bitmap *bi;
 	u64 start_block = gfs2_rs_startblk(rs);
 	const unsigned int elen = *nblocks;
 
-	/*BUG_ON(!gfs2_glock_is_locked_by_me(ip->i_gl));*/
-	gfs2_assert_withdraw(sdp, rgd);
-	/*BUG_ON(!gfs2_glock_is_locked_by_me(rgd->rd_gl));*/
 	bi = rs->rs_bi;
 	gfs2_trans_add_bh(rgd->rd_gl, bi->bi_bh, 1);
 
 	for (*nblocks = 0; *nblocks < elen && rs->rs_free; (*nblocks)++) {
-		/* Make sure the bitmap hasn't changed */
+		if (gfs2_testbit(rgd, bi->bi_bh->b_data + bi->bi_offset,
+				 bi->bi_len, rs->rs_biblk) != GFS2_BLKST_FREE)
+			break;
 		gfs2_setbit(rgd, bi->bi_clone, bi, rs->rs_biblk,
 			    dinode ? GFS2_BLKST_DINODE : GFS2_BLKST_USED);
 		rs->rs_biblk++;
@@ -1991,20 +1989,12 @@ static u64 claim_reserved_blks(struct gfs2_inode *ip, bool dinode,
 		BUG_ON(!rgd->rd_reserved);
 		rgd->rd_reserved--;
 		dinode = false;
-		trace_gfs2_rs(ip, rs, TRACE_RS_CLAIM);
 	}
 
-	if (!rs->rs_free) {
-		struct gfs2_rgrpd *rgd = ip->i_res->rs_rgd;
-
+	trace_gfs2_rs(ip, rs, TRACE_RS_CLAIM);
+	if (!rs->rs_free || *nblocks != elen)
 		gfs2_rs_deltree(rs);
-		/* -nblocks because we haven't returned to do the math yet.
-		   I'm doing the math backwards to prevent negative numbers,
-		   but think of it as:
-		   if (unclaimed_blocks(rgd) - *nblocks >= RGRP_RSRV_MINBLKS */
-		if (unclaimed_blocks(rgd) >= RGRP_RSRV_MINBLKS + *nblocks)
-			rg_mblk_search(rgd, ip);
-	}
+
 	return start_block;
 }
 
@@ -2037,34 +2027,34 @@ int gfs2_alloc_blocks(struct gfs2_inode *ip, u64 *bn, unsigned int *nblocks,
 	if (ip->i_res->rs_requested == 0)
 		return -ECANCELED;
 
-	/* Check if we have a multi-block reservation, and if so, claim the
-	   next free block from it. */
+	/* If we have a reservation, claim blocks from it. */
 	if (gfs2_rs_active(ip->i_res)) {
 		BUG_ON(!ip->i_res->rs_free);
 		rgd = ip->i_res->rs_rgd;
 		block = claim_reserved_blks(ip, dinode, nblocks);
-	} else {
-		rgd = ip->i_rgd;
+		if (*nblocks)
+			goto found_blocks;
+	}
 
-		if (!dinode && rgrp_contains_block(rgd, ip->i_goal))
-			goal = ip->i_goal - rgd->rd_data0;
-		else
-			goal = rgd->rd_last_alloc;
-
-		blk = rgblk_search(rgd, goal, GFS2_BLKST_FREE, &bi);
-
-		/* Since all blocks are reserved in advance, this shouldn't
-		   happen */
-		if (blk == BFITNOENT) {
-			printk(KERN_WARNING "BFITNOENT, nblocks=%u\n",
-			       *nblocks);
-			printk(KERN_WARNING "FULL=%d\n",
-			       test_bit(GBF_FULL, &rgd->rd_bits->bi_flags));
-			goto rgrp_error;
-		}
+	rgd = ip->i_rgd;
 
-		block = gfs2_alloc_extent(rgd, bi, blk, dinode, nblocks);
+	if (!dinode && rgrp_contains_block(rgd, ip->i_goal))
+		goal = ip->i_goal - rgd->rd_data0;
+	else
+		goal = rgd->rd_last_alloc;
+
+	blk = rgblk_search(rgd, goal, GFS2_BLKST_FREE, &bi);
+
+	/* Since all blocks are reserved in advance, this shouldn't happen */
+	if (blk == BFITNOENT) {
+		printk(KERN_WARNING "BFITNOENT, nblocks=%u\n", *nblocks);
+		printk(KERN_WARNING "FULL=%d\n",
+		       test_bit(GBF_FULL, &rgd->rd_bits->bi_flags));
+		goto rgrp_error;
 	}
+
+	block = gfs2_alloc_extent(rgd, bi, blk, dinode, nblocks);
+found_blocks:
 	ndata = *nblocks;
 	if (dinode)
 		ndata--;
diff --git a/fs/jbd/journal.c b/fs/jbd/journal.c
index 09357508ec9..a2862339323 100644
--- a/fs/jbd/journal.c
+++ b/fs/jbd/journal.c
@@ -1113,6 +1113,11 @@ static void mark_journal_empty(journal_t *journal)
 
 	BUG_ON(!mutex_is_locked(&journal->j_checkpoint_mutex));
 	spin_lock(&journal->j_state_lock);
+	/* Is it already empty? */
+	if (sb->s_start == 0) {
+		spin_unlock(&journal->j_state_lock);
+		return;
+	}
 	jbd_debug(1, "JBD: Marking journal as empty (seq %d)\n",
         	  journal->j_tail_sequence);
 
diff --git a/fs/jbd2/journal.c b/fs/jbd2/journal.c
index 8625da27ecc..e149b99a7ff 100644
--- a/fs/jbd2/journal.c
+++ b/fs/jbd2/journal.c
@@ -1377,7 +1377,7 @@ static void jbd2_mark_journal_empty(journal_t *journal)
  * Update a journal's errno.  Write updated superblock to disk waiting for IO
  * to complete.
  */
-static void jbd2_journal_update_sb_errno(journal_t *journal)
+void jbd2_journal_update_sb_errno(journal_t *journal)
 {
 	journal_superblock_t *sb = journal->j_superblock;
 
@@ -1390,6 +1390,7 @@ static void jbd2_journal_update_sb_errno(journal_t *journal)
 
 	jbd2_write_superblock(journal, WRITE_SYNC);
 }
+EXPORT_SYMBOL(jbd2_journal_update_sb_errno);
 
 /*
  * Read the superblock for a given journal, performing initial
diff --git a/fs/logfs/dev_bdev.c b/fs/logfs/dev_bdev.c
index df0de27c273..e784a217b50 100644
--- a/fs/logfs/dev_bdev.c
+++ b/fs/logfs/dev_bdev.c
@@ -26,6 +26,7 @@ static int sync_request(struct page *page, struct block_device *bdev, int rw)
 	struct completion complete;
 
 	bio_init(&bio);
+	bio.bi_max_vecs = 1;
 	bio.bi_io_vec = &bio_vec;
 	bio_vec.bv_page = page;
 	bio_vec.bv_len = PAGE_SIZE;
@@ -95,12 +96,11 @@ static int __bdev_writeseg(struct super_block *sb, u64 ofs, pgoff_t index,
 	struct address_space *mapping = super->s_mapping_inode->i_mapping;
 	struct bio *bio;
 	struct page *page;
-	struct request_queue *q = bdev_get_queue(sb->s_bdev);
-	unsigned int max_pages = queue_max_hw_sectors(q) >> (PAGE_SHIFT - 9);
+	unsigned int max_pages;
 	int i;
 
-	if (max_pages > BIO_MAX_PAGES)
-		max_pages = BIO_MAX_PAGES;
+	max_pages = min(nr_pages, (size_t) bio_get_nr_vecs(super->s_bdev));
+
 	bio = bio_alloc(GFP_NOFS, max_pages);
 	BUG_ON(!bio);
 
@@ -190,12 +190,11 @@ static int do_erase(struct super_block *sb, u64 ofs, pgoff_t index,
 {
 	struct logfs_super *super = logfs_super(sb);
 	struct bio *bio;
-	struct request_queue *q = bdev_get_queue(sb->s_bdev);
-	unsigned int max_pages = queue_max_hw_sectors(q) >> (PAGE_SHIFT - 9);
+	unsigned int max_pages;
 	int i;
 
-	if (max_pages > BIO_MAX_PAGES)
-		max_pages = BIO_MAX_PAGES;
+	max_pages = min(nr_pages, (size_t) bio_get_nr_vecs(super->s_bdev));
+
 	bio = bio_alloc(GFP_NOFS, max_pages);
 	BUG_ON(!bio);
 
diff --git a/fs/logfs/inode.c b/fs/logfs/inode.c
index a422f42238b..6984562738d 100644
--- a/fs/logfs/inode.c
+++ b/fs/logfs/inode.c
@@ -156,10 +156,26 @@ static void __logfs_destroy_inode(struct inode *inode)
 	call_rcu(&inode->i_rcu, logfs_i_callback);
 }
 
+static void __logfs_destroy_meta_inode(struct inode *inode)
+{
+	struct logfs_inode *li = logfs_inode(inode);
+	BUG_ON(li->li_block);
+	call_rcu(&inode->i_rcu, logfs_i_callback);
+}
+
 static void logfs_destroy_inode(struct inode *inode)
 {
 	struct logfs_inode *li = logfs_inode(inode);
 
+	if (inode->i_ino < LOGFS_RESERVED_INOS) {
+		/*
+		 * The reserved inodes are never destroyed unless we are in
+		 * unmont path.
+		 */
+		__logfs_destroy_meta_inode(inode);
+		return;
+	}
+
 	BUG_ON(list_empty(&li->li_freeing_list));
 	spin_lock(&logfs_inode_lock);
 	li->li_refcount--;
@@ -373,8 +389,8 @@ static void logfs_put_super(struct super_block *sb)
 {
 	struct logfs_super *super = logfs_super(sb);
 	/* kill the meta-inodes */
-	iput(super->s_master_inode);
 	iput(super->s_segfile_inode);
+	iput(super->s_master_inode);
 	iput(super->s_mapping_inode);
 }
 
diff --git a/fs/logfs/journal.c b/fs/logfs/journal.c
index 1e1c369df22..2a09b8d7398 100644
--- a/fs/logfs/journal.c
+++ b/fs/logfs/journal.c
@@ -565,7 +565,7 @@ static void write_wbuf(struct super_block *sb, struct logfs_area *area,
 	index = ofs >> PAGE_SHIFT;
 	page_ofs = ofs & (PAGE_SIZE - 1);
 
-	page = find_lock_page(mapping, index);
+	page = find_or_create_page(mapping, index, GFP_NOFS);
 	BUG_ON(!page);
 	memcpy(wbuf, page_address(page) + page_ofs, super->s_writesize);
 	unlock_page(page);
diff --git a/fs/logfs/readwrite.c b/fs/logfs/readwrite.c
index f1cb512c501..5be0abef603 100644
--- a/fs/logfs/readwrite.c
+++ b/fs/logfs/readwrite.c
@@ -2189,7 +2189,6 @@ void logfs_evict_inode(struct inode *inode)
 		return;
 	}
 
-	BUG_ON(inode->i_ino < LOGFS_RESERVED_INOS);
 	page = inode_to_page(inode);
 	BUG_ON(!page); /* FIXME: Use emergency page */
 	logfs_put_write_page(page);
diff --git a/fs/logfs/segment.c b/fs/logfs/segment.c
index e28d090c98d..038da099179 100644
--- a/fs/logfs/segment.c
+++ b/fs/logfs/segment.c
@@ -886,7 +886,7 @@ static struct logfs_area *alloc_area(struct super_block *sb)
 
 static void map_invalidatepage(struct page *page, unsigned long l)
 {
-	BUG();
+	return;
 }
 
 static int map_releasepage(struct page *page, gfp_t g)
diff --git a/fs/namei.c b/fs/namei.c
index 1b464390dde..dd1ed1b8e98 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -352,6 +352,7 @@ int __inode_permission(struct inode *inode, int mask)
 /**
  * sb_permission - Check superblock-level permissions
  * @sb: Superblock of inode to check permission on
+ * @inode: Inode to check permission on
  * @mask: Right to check for (%MAY_READ, %MAY_WRITE, %MAY_EXEC)
  *
  * Separate out file-system wide checks from inode-specific permission checks.
@@ -656,6 +657,7 @@ int sysctl_protected_hardlinks __read_mostly = 1;
 /**
  * may_follow_link - Check symlink following for unsafe situations
  * @link: The path of the symlink
+ * @nd: nameidata pathwalk data
  *
  * In the case of the sysctl_protected_symlinks sysctl being enabled,
  * CAP_DAC_OVERRIDE needs to be specifically ignored if the symlink is
@@ -2414,7 +2416,7 @@ static int atomic_open(struct nameidata *nd, struct dentry *dentry,
 		goto out;
 	}
 
-	mode = op->mode & S_IALLUGO;
+	mode = op->mode;
 	if ((open_flag & O_CREAT) && !IS_POSIXACL(dir))
 		mode &= ~current_umask();
 
@@ -2452,7 +2454,7 @@ static int atomic_open(struct nameidata *nd, struct dentry *dentry,
 	}
 
 	if (open_flag & O_CREAT) {
-		error = may_o_create(&nd->path, dentry, op->mode);
+		error = may_o_create(&nd->path, dentry, mode);
 		if (error) {
 			create_error = error;
 			if (open_flag & O_EXCL)
@@ -2489,6 +2491,10 @@ static int atomic_open(struct nameidata *nd, struct dentry *dentry,
 			dput(dentry);
 			dentry = file->f_path.dentry;
 		}
+		if (create_error && dentry->d_inode == NULL) {
+			error = create_error;
+			goto out;
+		}
 		goto looked_up;
 	}
 
diff --git a/fs/nfs/Makefile b/fs/nfs/Makefile
index 8bf3a3f6925..b7db60897f9 100644
--- a/fs/nfs/Makefile
+++ b/fs/nfs/Makefile
@@ -12,19 +12,19 @@ nfs-$(CONFIG_ROOT_NFS)	+= nfsroot.o
 nfs-$(CONFIG_SYSCTL)	+= sysctl.o
 nfs-$(CONFIG_NFS_FSCACHE) += fscache.o fscache-index.o
 
-obj-$(CONFIG_NFS_V2) += nfs2.o
-nfs2-y := nfs2super.o proc.o nfs2xdr.o
+obj-$(CONFIG_NFS_V2) += nfsv2.o
+nfsv2-y := nfs2super.o proc.o nfs2xdr.o
 
-obj-$(CONFIG_NFS_V3) += nfs3.o
-nfs3-y := nfs3super.o nfs3client.o nfs3proc.o nfs3xdr.o
-nfs3-$(CONFIG_NFS_V3_ACL) += nfs3acl.o
+obj-$(CONFIG_NFS_V3) += nfsv3.o
+nfsv3-y := nfs3super.o nfs3client.o nfs3proc.o nfs3xdr.o
+nfsv3-$(CONFIG_NFS_V3_ACL) += nfs3acl.o
 
-obj-$(CONFIG_NFS_V4) += nfs4.o
-nfs4-y := nfs4proc.o nfs4xdr.o nfs4state.o nfs4renewd.o nfs4super.o nfs4file.o \
+obj-$(CONFIG_NFS_V4) += nfsv4.o
+nfsv4-y := nfs4proc.o nfs4xdr.o nfs4state.o nfs4renewd.o nfs4super.o nfs4file.o \
 	  delegation.o idmap.o callback.o callback_xdr.o callback_proc.o \
 	  nfs4namespace.o nfs4getroot.o nfs4client.o
-nfs4-$(CONFIG_SYSCTL)	+= nfs4sysctl.o
-nfs4-$(CONFIG_NFS_V4_1)	+= pnfs.o pnfs_dev.o
+nfsv4-$(CONFIG_SYSCTL)	+= nfs4sysctl.o
+nfsv4-$(CONFIG_NFS_V4_1)	+= pnfs.o pnfs_dev.o
 
 obj-$(CONFIG_PNFS_FILE_LAYOUT) += nfs_layout_nfsv41_files.o
 nfs_layout_nfsv41_files-y := nfs4filelayout.o nfs4filelayoutdev.o
diff --git a/fs/nfs/client.c b/fs/nfs/client.c
index 9fc0d9dfc91..99694442b93 100644
--- a/fs/nfs/client.c
+++ b/fs/nfs/client.c
@@ -105,7 +105,7 @@ struct nfs_subversion *get_nfs_version(unsigned int version)
 
 	if (IS_ERR(nfs)) {
 		mutex_lock(&nfs_version_mutex);
-		request_module("nfs%d", version);
+		request_module("nfsv%d", version);
 		nfs = find_nfs_version(version);
 		mutex_unlock(&nfs_version_mutex);
 	}
diff --git a/fs/nfs/file.c b/fs/nfs/file.c
index 75d6d0a3d32..6a7fcab7ecb 100644
--- a/fs/nfs/file.c
+++ b/fs/nfs/file.c
@@ -287,10 +287,12 @@ nfs_file_fsync(struct file *file, loff_t start, loff_t end, int datasync)
 	struct inode *inode = file->f_path.dentry->d_inode;
 
 	ret = filemap_write_and_wait_range(inode->i_mapping, start, end);
+	if (ret != 0)
+		goto out;
 	mutex_lock(&inode->i_mutex);
 	ret = nfs_file_fsync_commit(file, start, end, datasync);
 	mutex_unlock(&inode->i_mutex);
-
+out:
 	return ret;
 }
 
diff --git a/fs/nfs/idmap.c b/fs/nfs/idmap.c
index b701358c39c..a850079467d 100644
--- a/fs/nfs/idmap.c
+++ b/fs/nfs/idmap.c
@@ -61,6 +61,12 @@ struct idmap {
 	struct mutex		idmap_mutex;
 };
 
+struct idmap_legacy_upcalldata {
+	struct rpc_pipe_msg pipe_msg;
+	struct idmap_msg idmap_msg;
+	struct idmap *idmap;
+};
+
 /**
  * nfs_fattr_init_names - initialise the nfs_fattr owner_name/group_name fields
  * @fattr: fully initialised struct nfs_fattr
@@ -324,6 +330,7 @@ static ssize_t nfs_idmap_get_key(const char *name, size_t namelen,
 		ret = nfs_idmap_request_key(&key_type_id_resolver_legacy,
 					    name, namelen, type, data,
 					    data_size, idmap);
+		idmap->idmap_key_cons = NULL;
 		mutex_unlock(&idmap->idmap_mutex);
 	}
 	return ret;
@@ -380,11 +387,13 @@ static const match_table_t nfs_idmap_tokens = {
 static int nfs_idmap_legacy_upcall(struct key_construction *, const char *, void *);
 static ssize_t idmap_pipe_downcall(struct file *, const char __user *,
 				   size_t);
+static void idmap_release_pipe(struct inode *);
 static void idmap_pipe_destroy_msg(struct rpc_pipe_msg *);
 
 static const struct rpc_pipe_ops idmap_upcall_ops = {
 	.upcall		= rpc_pipe_generic_upcall,
 	.downcall	= idmap_pipe_downcall,
+	.release_pipe	= idmap_release_pipe,
 	.destroy_msg	= idmap_pipe_destroy_msg,
 };
 
@@ -616,7 +625,8 @@ void nfs_idmap_quit(void)
 	nfs_idmap_quit_keyring();
 }
 
-static int nfs_idmap_prepare_message(char *desc, struct idmap_msg *im,
+static int nfs_idmap_prepare_message(char *desc, struct idmap *idmap,
+				     struct idmap_msg *im,
 				     struct rpc_pipe_msg *msg)
 {
 	substring_t substr;
@@ -659,6 +669,7 @@ static int nfs_idmap_legacy_upcall(struct key_construction *cons,
 				   const char *op,
 				   void *aux)
 {
+	struct idmap_legacy_upcalldata *data;
 	struct rpc_pipe_msg *msg;
 	struct idmap_msg *im;
 	struct idmap *idmap = (struct idmap *)aux;
@@ -666,15 +677,15 @@ static int nfs_idmap_legacy_upcall(struct key_construction *cons,
 	int ret = -ENOMEM;
 
 	/* msg and im are freed in idmap_pipe_destroy_msg */
-	msg = kmalloc(sizeof(*msg), GFP_KERNEL);
-	if (!msg)
-		goto out0;
-
-	im = kmalloc(sizeof(*im), GFP_KERNEL);
-	if (!im)
+	data = kmalloc(sizeof(*data), GFP_KERNEL);
+	if (!data)
 		goto out1;
 
-	ret = nfs_idmap_prepare_message(key->description, im, msg);
+	msg = &data->pipe_msg;
+	im = &data->idmap_msg;
+	data->idmap = idmap;
+
+	ret = nfs_idmap_prepare_message(key->description, idmap, im, msg);
 	if (ret < 0)
 		goto out2;
 
@@ -683,15 +694,15 @@ static int nfs_idmap_legacy_upcall(struct key_construction *cons,
 
 	ret = rpc_queue_upcall(idmap->idmap_pipe, msg);
 	if (ret < 0)
-		goto out2;
+		goto out3;
 
 	return ret;
 
+out3:
+	idmap->idmap_key_cons = NULL;
 out2:
-	kfree(im);
+	kfree(data);
 out1:
-	kfree(msg);
-out0:
 	complete_request_key(cons, ret);
 	return ret;
 }
@@ -749,9 +760,8 @@ idmap_pipe_downcall(struct file *filp, const char __user *src, size_t mlen)
 	}
 
 	if (!(im.im_status & IDMAP_STATUS_SUCCESS)) {
-		ret = mlen;
-		complete_request_key(cons, -ENOKEY);
-		goto out_incomplete;
+		ret = -ENOKEY;
+		goto out;
 	}
 
 	namelen_in = strnlen(im.im_name, IDMAP_NAMESZ);
@@ -768,16 +778,32 @@ idmap_pipe_downcall(struct file *filp, const char __user *src, size_t mlen)
 
 out:
 	complete_request_key(cons, ret);
-out_incomplete:
 	return ret;
 }
 
 static void
 idmap_pipe_destroy_msg(struct rpc_pipe_msg *msg)
 {
+	struct idmap_legacy_upcalldata *data = container_of(msg,
+			struct idmap_legacy_upcalldata,
+			pipe_msg);
+	struct idmap *idmap = data->idmap;
+	struct key_construction *cons;
+	if (msg->errno) {
+		cons = ACCESS_ONCE(idmap->idmap_key_cons);
+		idmap->idmap_key_cons = NULL;
+		complete_request_key(cons, msg->errno);
+	}
 	/* Free memory allocated in nfs_idmap_legacy_upcall() */
-	kfree(msg->data);
-	kfree(msg);
+	kfree(data);
+}
+
+static void
+idmap_release_pipe(struct inode *inode)
+{
+	struct rpc_inode *rpci = RPC_I(inode);
+	struct idmap *idmap = (struct idmap *)rpci->private;
+	idmap->idmap_key_cons = NULL;
 }
 
 int nfs_map_name_to_uid(const struct nfs_server *server, const char *name, size_t namelen, __u32 *uid)
diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c
index c6e895f0fbf..9b47610338f 100644
--- a/fs/nfs/inode.c
+++ b/fs/nfs/inode.c
@@ -154,7 +154,7 @@ static void nfs_zap_caches_locked(struct inode *inode)
 	nfsi->attrtimeo = NFS_MINATTRTIMEO(inode);
 	nfsi->attrtimeo_timestamp = jiffies;
 
-	memset(NFS_COOKIEVERF(inode), 0, sizeof(NFS_COOKIEVERF(inode)));
+	memset(NFS_I(inode)->cookieverf, 0, sizeof(NFS_I(inode)->cookieverf));
 	if (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode))
 		nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL|NFS_INO_REVAL_PAGECACHE;
 	else
diff --git a/fs/nfs/nfs3proc.c b/fs/nfs/nfs3proc.c
index 0952c791df3..69322096c32 100644
--- a/fs/nfs/nfs3proc.c
+++ b/fs/nfs/nfs3proc.c
@@ -69,7 +69,7 @@ do_proc_get_root(struct rpc_clnt *client, struct nfs_fh *fhandle,
 	nfs_fattr_init(info->fattr);
 	status = rpc_call_sync(client, &msg, 0);
 	dprintk("%s: reply fsinfo: %d\n", __func__, status);
-	if (!(info->fattr->valid & NFS_ATTR_FATTR)) {
+	if (status == 0 && !(info->fattr->valid & NFS_ATTR_FATTR)) {
 		msg.rpc_proc = &nfs3_procedures[NFS3PROC_GETATTR];
 		msg.rpc_resp = info->fattr;
 		status = rpc_call_sync(client, &msg, 0);
@@ -643,7 +643,7 @@ nfs3_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
 		  u64 cookie, struct page **pages, unsigned int count, int plus)
 {
 	struct inode		*dir = dentry->d_inode;
-	__be32			*verf = NFS_COOKIEVERF(dir);
+	__be32			*verf = NFS_I(dir)->cookieverf;
 	struct nfs3_readdirargs	arg = {
 		.fh		= NFS_FH(dir),
 		.cookie		= cookie,
diff --git a/fs/nfs/nfs4_fs.h b/fs/nfs/nfs4_fs.h
index 3b950dd81e8..da0618aeead 100644
--- a/fs/nfs/nfs4_fs.h
+++ b/fs/nfs/nfs4_fs.h
@@ -205,6 +205,9 @@ extern const struct dentry_operations nfs4_dentry_operations;
 int nfs_atomic_open(struct inode *, struct dentry *, struct file *,
 		    unsigned, umode_t, int *);
 
+/* super.c */
+extern struct file_system_type nfs4_fs_type;
+
 /* nfs4namespace.c */
 rpc_authflavor_t nfs_find_best_sec(struct nfs4_secinfo_flavors *);
 struct rpc_clnt *nfs4_create_sec_client(struct rpc_clnt *, struct inode *, struct qstr *);
diff --git a/fs/nfs/nfs4client.c b/fs/nfs/nfs4client.c
index cbcdfaf3250..24eb663f8ed 100644
--- a/fs/nfs/nfs4client.c
+++ b/fs/nfs/nfs4client.c
@@ -74,7 +74,7 @@ struct nfs_client *nfs4_alloc_client(const struct nfs_client_initdata *cl_init)
 	return clp;
 
 error:
-	kfree(clp);
+	nfs_free_client(clp);
 	return ERR_PTR(err);
 }
 
diff --git a/fs/nfs/nfs4file.c b/fs/nfs/nfs4file.c
index acb65e7887f..eb5eb8eef4d 100644
--- a/fs/nfs/nfs4file.c
+++ b/fs/nfs/nfs4file.c
@@ -96,13 +96,15 @@ nfs4_file_fsync(struct file *file, loff_t start, loff_t end, int datasync)
 	struct inode *inode = file->f_path.dentry->d_inode;
 
 	ret = filemap_write_and_wait_range(inode->i_mapping, start, end);
+	if (ret != 0)
+		goto out;
 	mutex_lock(&inode->i_mutex);
 	ret = nfs_file_fsync_commit(file, start, end, datasync);
 	if (!ret && !datasync)
 		/* application has asked for meta-data sync */
 		ret = pnfs_layoutcommit_inode(inode, true);
 	mutex_unlock(&inode->i_mutex);
-
+out:
 	return ret;
 }
 
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index a99a8d94872..1e50326d00d 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -3215,11 +3215,11 @@ static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
 			dentry->d_parent->d_name.name,
 			dentry->d_name.name,
 			(unsigned long long)cookie);
-	nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
+	nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
 	res.pgbase = args.pgbase;
 	status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
 	if (status >= 0) {
-		memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
+		memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
 		status += args.pgbase;
 	}
 
@@ -3653,11 +3653,11 @@ static inline int nfs4_server_supports_acls(struct nfs_server *server)
 		&& (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
 }
 
-/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
- * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
+/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
+ * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
  * the stack.
  */
-#define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
+#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
 
 static int buf_to_pages_noslab(const void *buf, size_t buflen,
 		struct page **pages, unsigned int *pgbase)
@@ -3668,7 +3668,7 @@ static int buf_to_pages_noslab(const void *buf, size_t buflen,
 	spages = pages;
 
 	do {
-		len = min_t(size_t, PAGE_CACHE_SIZE, buflen);
+		len = min_t(size_t, PAGE_SIZE, buflen);
 		newpage = alloc_page(GFP_KERNEL);
 
 		if (newpage == NULL)
@@ -3737,9 +3737,10 @@ out:
 static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
 {
 	struct nfs4_cached_acl *acl;
+	size_t buflen = sizeof(*acl) + acl_len;
 
-	if (pages && acl_len <= PAGE_SIZE) {
-		acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
+	if (buflen <= PAGE_SIZE) {
+		acl = kmalloc(buflen, GFP_KERNEL);
 		if (acl == NULL)
 			goto out;
 		acl->cached = 1;
@@ -3781,17 +3782,15 @@ static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t bu
 		.rpc_argp = &args,
 		.rpc_resp = &res,
 	};
-	int ret = -ENOMEM, npages, i;
-	size_t acl_len = 0;
+	unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
+	int ret = -ENOMEM, i;
 
-	npages = (buflen + PAGE_SIZE - 1) >> PAGE_SHIFT;
 	/* As long as we're doing a round trip to the server anyway,
 	 * let's be prepared for a page of acl data. */
 	if (npages == 0)
 		npages = 1;
-
-	/* Add an extra page to handle the bitmap returned */
-	npages++;
+	if (npages > ARRAY_SIZE(pages))
+		return -ERANGE;
 
 	for (i = 0; i < npages; i++) {
 		pages[i] = alloc_page(GFP_KERNEL);
@@ -3807,11 +3806,6 @@ static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t bu
 	args.acl_len = npages * PAGE_SIZE;
 	args.acl_pgbase = 0;
 
-	/* Let decode_getfacl know not to fail if the ACL data is larger than
-	 * the page we send as a guess */
-	if (buf == NULL)
-		res.acl_flags |= NFS4_ACL_LEN_REQUEST;
-
 	dprintk("%s  buf %p buflen %zu npages %d args.acl_len %zu\n",
 		__func__, buf, buflen, npages, args.acl_len);
 	ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
@@ -3819,20 +3813,19 @@ static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t bu
 	if (ret)
 		goto out_free;
 
-	acl_len = res.acl_len - res.acl_data_offset;
-	if (acl_len > args.acl_len)
-		nfs4_write_cached_acl(inode, NULL, 0, acl_len);
-	else
-		nfs4_write_cached_acl(inode, pages, res.acl_data_offset,
-				      acl_len);
-	if (buf) {
+	/* Handle the case where the passed-in buffer is too short */
+	if (res.acl_flags & NFS4_ACL_TRUNC) {
+		/* Did the user only issue a request for the acl length? */
+		if (buf == NULL)
+			goto out_ok;
 		ret = -ERANGE;
-		if (acl_len > buflen)
-			goto out_free;
-		_copy_from_pages(buf, pages, res.acl_data_offset,
-				acl_len);
+		goto out_free;
 	}
-	ret = acl_len;
+	nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
+	if (buf)
+		_copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
+out_ok:
+	ret = res.acl_len;
 out_free:
 	for (i = 0; i < npages; i++)
 		if (pages[i])
@@ -3890,10 +3883,13 @@ static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t bufl
 		.rpc_argp	= &arg,
 		.rpc_resp	= &res,
 	};
+	unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
 	int ret, i;
 
 	if (!nfs4_server_supports_acls(server))
 		return -EOPNOTSUPP;
+	if (npages > ARRAY_SIZE(pages))
+		return -ERANGE;
 	i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
 	if (i < 0)
 		return i;
@@ -6223,11 +6219,58 @@ static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
 	dprintk("<-- %s\n", __func__);
 }
 
+static size_t max_response_pages(struct nfs_server *server)
+{
+	u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
+	return nfs_page_array_len(0, max_resp_sz);
+}
+
+static void nfs4_free_pages(struct page **pages, size_t size)
+{
+	int i;
+
+	if (!pages)
+		return;
+
+	for (i = 0; i < size; i++) {
+		if (!pages[i])
+			break;
+		__free_page(pages[i]);
+	}
+	kfree(pages);
+}
+
+static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
+{
+	struct page **pages;
+	int i;
+
+	pages = kcalloc(size, sizeof(struct page *), gfp_flags);
+	if (!pages) {
+		dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
+		return NULL;
+	}
+
+	for (i = 0; i < size; i++) {
+		pages[i] = alloc_page(gfp_flags);
+		if (!pages[i]) {
+			dprintk("%s: failed to allocate page\n", __func__);
+			nfs4_free_pages(pages, size);
+			return NULL;
+		}
+	}
+
+	return pages;
+}
+
 static void nfs4_layoutget_release(void *calldata)
 {
 	struct nfs4_layoutget *lgp = calldata;
+	struct nfs_server *server = NFS_SERVER(lgp->args.inode);
+	size_t max_pages = max_response_pages(server);
 
 	dprintk("--> %s\n", __func__);
+	nfs4_free_pages(lgp->args.layout.pages, max_pages);
 	put_nfs_open_context(lgp->args.ctx);
 	kfree(calldata);
 	dprintk("<-- %s\n", __func__);
@@ -6239,9 +6282,10 @@ static const struct rpc_call_ops nfs4_layoutget_call_ops = {
 	.rpc_release = nfs4_layoutget_release,
 };
 
-int nfs4_proc_layoutget(struct nfs4_layoutget *lgp)
+void nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
 {
 	struct nfs_server *server = NFS_SERVER(lgp->args.inode);
+	size_t max_pages = max_response_pages(server);
 	struct rpc_task *task;
 	struct rpc_message msg = {
 		.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
@@ -6259,12 +6303,19 @@ int nfs4_proc_layoutget(struct nfs4_layoutget *lgp)
 
 	dprintk("--> %s\n", __func__);
 
+	lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
+	if (!lgp->args.layout.pages) {
+		nfs4_layoutget_release(lgp);
+		return;
+	}
+	lgp->args.layout.pglen = max_pages * PAGE_SIZE;
+
 	lgp->res.layoutp = &lgp->args.layout;
 	lgp->res.seq_res.sr_slot = NULL;
 	nfs41_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
 	task = rpc_run_task(&task_setup_data);
 	if (IS_ERR(task))
-		return PTR_ERR(task);
+		return;
 	status = nfs4_wait_for_completion_rpc_task(task);
 	if (status == 0)
 		status = task->tk_status;
@@ -6272,7 +6323,7 @@ int nfs4_proc_layoutget(struct nfs4_layoutget *lgp)
 		status = pnfs_layout_process(lgp);
 	rpc_put_task(task);
 	dprintk("<-- %s status=%d\n", __func__, status);
-	return status;
+	return;
 }
 
 static void
@@ -6304,12 +6355,8 @@ static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
 		return;
 	}
 	spin_lock(&lo->plh_inode->i_lock);
-	if (task->tk_status == 0) {
-		if (lrp->res.lrs_present) {
-			pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
-		} else
-			BUG_ON(!list_empty(&lo->plh_segs));
-	}
+	if (task->tk_status == 0 && lrp->res.lrs_present)
+		pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
 	lo->plh_block_lgets--;
 	spin_unlock(&lo->plh_inode->i_lock);
 	dprintk("<-- %s\n", __func__);
diff --git a/fs/nfs/nfs4super.c b/fs/nfs/nfs4super.c
index 12a31a9dbcd..bd61221ad2c 100644
--- a/fs/nfs/nfs4super.c
+++ b/fs/nfs/nfs4super.c
@@ -23,14 +23,6 @@ static struct dentry *nfs4_referral_mount(struct file_system_type *fs_type,
 static struct dentry *nfs4_remote_referral_mount(struct file_system_type *fs_type,
 	int flags, const char *dev_name, void *raw_data);
 
-static struct file_system_type nfs4_fs_type = {
-	.owner		= THIS_MODULE,
-	.name		= "nfs4",
-	.mount		= nfs_fs_mount,
-	.kill_sb	= nfs_kill_super,
-	.fs_flags	= FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA,
-};
-
 static struct file_system_type nfs4_remote_fs_type = {
 	.owner		= THIS_MODULE,
 	.name		= "nfs4",
@@ -344,14 +336,8 @@ static int __init init_nfs_v4(void)
 	if (err)
 		goto out1;
 
-	err = register_filesystem(&nfs4_fs_type);
-	if (err < 0)
-		goto out2;
-
 	register_nfs_version(&nfs_v4);
 	return 0;
-out2:
-	nfs4_unregister_sysctl();
 out1:
 	nfs_idmap_quit();
 out:
@@ -361,7 +347,6 @@ out:
 static void __exit exit_nfs_v4(void)
 {
 	unregister_nfs_version(&nfs_v4);
-	unregister_filesystem(&nfs4_fs_type);
 	nfs4_unregister_sysctl();
 	nfs_idmap_quit();
 }
diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c
index ca13483edd6..8dba6bd4855 100644
--- a/fs/nfs/nfs4xdr.c
+++ b/fs/nfs/nfs4xdr.c
@@ -5045,22 +5045,19 @@ static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
 			 struct nfs_getaclres *res)
 {
 	unsigned int savep;
-	__be32 *bm_p;
 	uint32_t attrlen,
 		 bitmap[3] = {0};
 	int status;
-	size_t page_len = xdr->buf->page_len;
+	unsigned int pg_offset;
 
 	res->acl_len = 0;
 	if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
 		goto out;
 
-	bm_p = xdr->p;
-	res->acl_data_offset = be32_to_cpup(bm_p) + 2;
-	res->acl_data_offset <<= 2;
-	/* Check if the acl data starts beyond the allocated buffer */
-	if (res->acl_data_offset > page_len)
-		return -ERANGE;
+	xdr_enter_page(xdr, xdr->buf->page_len);
+
+	/* Calculate the offset of the page data */
+	pg_offset = xdr->buf->head[0].iov_len;
 
 	if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
 		goto out;
@@ -5074,23 +5071,16 @@ static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
 		/* The bitmap (xdr len + bitmaps) and the attr xdr len words
 		 * are stored with the acl data to handle the problem of
 		 * variable length bitmaps.*/
-		xdr->p = bm_p;
-
-		/* We ignore &savep and don't do consistency checks on
-		 * the attr length.  Let userspace figure it out.... */
-		attrlen += res->acl_data_offset;
-		if (attrlen > page_len) {
-			if (res->acl_flags & NFS4_ACL_LEN_REQUEST) {
-				/* getxattr interface called with a NULL buf */
-				res->acl_len = attrlen;
-				goto out;
-			}
-			dprintk("NFS: acl reply: attrlen %u > page_len %zu\n",
-					attrlen, page_len);
-			return -EINVAL;
-		}
-		xdr_read_pages(xdr, attrlen);
+		res->acl_data_offset = xdr_stream_pos(xdr) - pg_offset;
 		res->acl_len = attrlen;
+
+		/* Check for receive buffer overflow */
+		if (res->acl_len > (xdr->nwords << 2) ||
+		    res->acl_len + res->acl_data_offset > xdr->buf->page_len) {
+			res->acl_flags |= NFS4_ACL_TRUNC;
+			dprintk("NFS: acl reply: attrlen %u > page_len %u\n",
+					attrlen, xdr->nwords << 2);
+		}
 	} else
 		status = -EOPNOTSUPP;
 
@@ -6235,7 +6225,8 @@ static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
 	status = decode_open(xdr, res);
 	if (status)
 		goto out;
-	if (decode_getfh(xdr, &res->fh) != 0)
+	status = decode_getfh(xdr, &res->fh);
+	if (status)
 		goto out;
 	decode_getfattr(xdr, res->f_attr, res->server);
 out:
diff --git a/fs/nfs/objlayout/objio_osd.c b/fs/nfs/objlayout/objio_osd.c
index f50d3e8d6f2..ea6d111b03e 100644
--- a/fs/nfs/objlayout/objio_osd.c
+++ b/fs/nfs/objlayout/objio_osd.c
@@ -570,17 +570,66 @@ static bool objio_pg_test(struct nfs_pageio_descriptor *pgio,
 		return false;
 
 	return pgio->pg_count + req->wb_bytes <=
-			OBJIO_LSEG(pgio->pg_lseg)->layout.max_io_length;
+			(unsigned long)pgio->pg_layout_private;
+}
+
+void objio_init_read(struct nfs_pageio_descriptor *pgio, struct nfs_page *req)
+{
+	pnfs_generic_pg_init_read(pgio, req);
+	if (unlikely(pgio->pg_lseg == NULL))
+		return; /* Not pNFS */
+
+	pgio->pg_layout_private = (void *)
+				OBJIO_LSEG(pgio->pg_lseg)->layout.max_io_length;
+}
+
+static bool aligned_on_raid_stripe(u64 offset, struct ore_layout *layout,
+				   unsigned long *stripe_end)
+{
+	u32 stripe_off;
+	unsigned stripe_size;
+
+	if (layout->raid_algorithm == PNFS_OSD_RAID_0)
+		return true;
+
+	stripe_size = layout->stripe_unit *
+				(layout->group_width - layout->parity);
+
+	div_u64_rem(offset, stripe_size, &stripe_off);
+	if (!stripe_off)
+		return true;
+
+	*stripe_end = stripe_size - stripe_off;
+	return false;
+}
+
+void objio_init_write(struct nfs_pageio_descriptor *pgio, struct nfs_page *req)
+{
+	unsigned long stripe_end = 0;
+
+	pnfs_generic_pg_init_write(pgio, req);
+	if (unlikely(pgio->pg_lseg == NULL))
+		return; /* Not pNFS */
+
+	if (req->wb_offset ||
+	    !aligned_on_raid_stripe(req->wb_index * PAGE_SIZE,
+			       &OBJIO_LSEG(pgio->pg_lseg)->layout,
+			       &stripe_end)) {
+		pgio->pg_layout_private = (void *)stripe_end;
+	} else {
+		pgio->pg_layout_private = (void *)
+				OBJIO_LSEG(pgio->pg_lseg)->layout.max_io_length;
+	}
 }
 
 static const struct nfs_pageio_ops objio_pg_read_ops = {
-	.pg_init = pnfs_generic_pg_init_read,
+	.pg_init = objio_init_read,
 	.pg_test = objio_pg_test,
 	.pg_doio = pnfs_generic_pg_readpages,
 };
 
 static const struct nfs_pageio_ops objio_pg_write_ops = {
-	.pg_init = pnfs_generic_pg_init_write,
+	.pg_init = objio_init_write,
 	.pg_test = objio_pg_test,
 	.pg_doio = pnfs_generic_pg_writepages,
 };
diff --git a/fs/nfs/pagelist.c b/fs/nfs/pagelist.c
index 1a6732ed04a..311a79681e2 100644
--- a/fs/nfs/pagelist.c
+++ b/fs/nfs/pagelist.c
@@ -49,6 +49,7 @@ void nfs_pgheader_init(struct nfs_pageio_descriptor *desc,
 	hdr->io_start = req_offset(hdr->req);
 	hdr->good_bytes = desc->pg_count;
 	hdr->dreq = desc->pg_dreq;
+	hdr->layout_private = desc->pg_layout_private;
 	hdr->release = release;
 	hdr->completion_ops = desc->pg_completion_ops;
 	if (hdr->completion_ops->init_hdr)
@@ -268,6 +269,7 @@ void nfs_pageio_init(struct nfs_pageio_descriptor *desc,
 	desc->pg_error = 0;
 	desc->pg_lseg = NULL;
 	desc->pg_dreq = NULL;
+	desc->pg_layout_private = NULL;
 }
 EXPORT_SYMBOL_GPL(nfs_pageio_init);
 
diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c
index 76875bfcf19..2e00feacd4b 100644
--- a/fs/nfs/pnfs.c
+++ b/fs/nfs/pnfs.c
@@ -583,9 +583,6 @@ send_layoutget(struct pnfs_layout_hdr *lo,
 	struct nfs_server *server = NFS_SERVER(ino);
 	struct nfs4_layoutget *lgp;
 	struct pnfs_layout_segment *lseg = NULL;
-	struct page **pages = NULL;
-	int i;
-	u32 max_resp_sz, max_pages;
 
 	dprintk("--> %s\n", __func__);
 
@@ -594,20 +591,6 @@ send_layoutget(struct pnfs_layout_hdr *lo,
 	if (lgp == NULL)
 		return NULL;
 
-	/* allocate pages for xdr post processing */
-	max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
-	max_pages = nfs_page_array_len(0, max_resp_sz);
-
-	pages = kcalloc(max_pages, sizeof(struct page *), gfp_flags);
-	if (!pages)
-		goto out_err_free;
-
-	for (i = 0; i < max_pages; i++) {
-		pages[i] = alloc_page(gfp_flags);
-		if (!pages[i])
-			goto out_err_free;
-	}
-
 	lgp->args.minlength = PAGE_CACHE_SIZE;
 	if (lgp->args.minlength > range->length)
 		lgp->args.minlength = range->length;
@@ -616,39 +599,19 @@ send_layoutget(struct pnfs_layout_hdr *lo,
 	lgp->args.type = server->pnfs_curr_ld->id;
 	lgp->args.inode = ino;
 	lgp->args.ctx = get_nfs_open_context(ctx);
-	lgp->args.layout.pages = pages;
-	lgp->args.layout.pglen = max_pages * PAGE_SIZE;
 	lgp->lsegpp = &lseg;
 	lgp->gfp_flags = gfp_flags;
 
 	/* Synchronously retrieve layout information from server and
 	 * store in lseg.
 	 */
-	nfs4_proc_layoutget(lgp);
+	nfs4_proc_layoutget(lgp, gfp_flags);
 	if (!lseg) {
 		/* remember that LAYOUTGET failed and suspend trying */
 		set_bit(lo_fail_bit(range->iomode), &lo->plh_flags);
 	}
 
-	/* free xdr pages */
-	for (i = 0; i < max_pages; i++)
-		__free_page(pages[i]);
-	kfree(pages);
-
 	return lseg;
-
-out_err_free:
-	/* free any allocated xdr pages, lgp as it's not used */
-	if (pages) {
-		for (i = 0; i < max_pages; i++) {
-			if (!pages[i])
-				break;
-			__free_page(pages[i]);
-		}
-		kfree(pages);
-	}
-	kfree(lgp);
-	return NULL;
 }
 
 /*
diff --git a/fs/nfs/pnfs.h b/fs/nfs/pnfs.h
index 2c6c80503ba..745aa1b39e7 100644
--- a/fs/nfs/pnfs.h
+++ b/fs/nfs/pnfs.h
@@ -172,7 +172,7 @@ extern int nfs4_proc_getdevicelist(struct nfs_server *server,
 				   struct pnfs_devicelist *devlist);
 extern int nfs4_proc_getdeviceinfo(struct nfs_server *server,
 				   struct pnfs_device *dev);
-extern int nfs4_proc_layoutget(struct nfs4_layoutget *lgp);
+extern void nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags);
 extern int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp);
 
 /* pnfs.c */
diff --git a/fs/nfs/super.c b/fs/nfs/super.c
index ac6a3c55dce..b8eda700584 100644
--- a/fs/nfs/super.c
+++ b/fs/nfs/super.c
@@ -319,6 +319,34 @@ EXPORT_SYMBOL_GPL(nfs_sops);
 static void nfs4_validate_mount_flags(struct nfs_parsed_mount_data *);
 static int nfs4_validate_mount_data(void *options,
 	struct nfs_parsed_mount_data *args, const char *dev_name);
+
+struct file_system_type nfs4_fs_type = {
+	.owner		= THIS_MODULE,
+	.name		= "nfs4",
+	.mount		= nfs_fs_mount,
+	.kill_sb	= nfs_kill_super,
+	.fs_flags	= FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA,
+};
+EXPORT_SYMBOL_GPL(nfs4_fs_type);
+
+static int __init register_nfs4_fs(void)
+{
+	return register_filesystem(&nfs4_fs_type);
+}
+
+static void unregister_nfs4_fs(void)
+{
+	unregister_filesystem(&nfs4_fs_type);
+}
+#else
+static int __init register_nfs4_fs(void)
+{
+	return 0;
+}
+
+static void unregister_nfs4_fs(void)
+{
+}
 #endif
 
 static struct shrinker acl_shrinker = {
@@ -337,12 +365,18 @@ int __init register_nfs_fs(void)
 	if (ret < 0)
 		goto error_0;
 
-	ret = nfs_register_sysctl();
+	ret = register_nfs4_fs();
 	if (ret < 0)
 		goto error_1;
+
+	ret = nfs_register_sysctl();
+	if (ret < 0)
+		goto error_2;
 	register_shrinker(&acl_shrinker);
 	return 0;
 
+error_2:
+	unregister_nfs4_fs();
 error_1:
 	unregister_filesystem(&nfs_fs_type);
 error_0:
@@ -356,6 +390,7 @@ void __exit unregister_nfs_fs(void)
 {
 	unregister_shrinker(&acl_shrinker);
 	nfs_unregister_sysctl();
+	unregister_nfs4_fs();
 	unregister_filesystem(&nfs_fs_type);
 }
 
@@ -1832,6 +1867,7 @@ static int nfs23_validate_mount_data(void *options,
 
 		memcpy(sap, &data->addr, sizeof(data->addr));
 		args->nfs_server.addrlen = sizeof(data->addr);
+		args->nfs_server.port = ntohs(data->addr.sin_port);
 		if (!nfs_verify_server_address(sap))
 			goto out_no_address;
 
@@ -2529,6 +2565,7 @@ static int nfs4_validate_mount_data(void *options,
 			return -EFAULT;
 		if (!nfs_verify_server_address(sap))
 			goto out_no_address;
+		args->nfs_server.port = ntohs(((struct sockaddr_in *)sap)->sin_port);
 
 		if (data->auth_flavourlen) {
 			if (data->auth_flavourlen > 1)
@@ -2645,4 +2682,6 @@ MODULE_PARM_DESC(max_session_slots, "Maximum number of outstanding NFSv4.1 "
 module_param(send_implementation_id, ushort, 0644);
 MODULE_PARM_DESC(send_implementation_id,
 		"Send implementation ID with NFSv4.1 exchange_id");
+MODULE_ALIAS("nfs4");
+
 #endif /* CONFIG_NFS_V4 */
diff --git a/fs/nfs/write.c b/fs/nfs/write.c
index 5829d0ce7cf..e3b55372726 100644
--- a/fs/nfs/write.c
+++ b/fs/nfs/write.c
@@ -1814,19 +1814,19 @@ int __init nfs_init_writepagecache(void)
 	nfs_wdata_mempool = mempool_create_slab_pool(MIN_POOL_WRITE,
 						     nfs_wdata_cachep);
 	if (nfs_wdata_mempool == NULL)
-		return -ENOMEM;
+		goto out_destroy_write_cache;
 
 	nfs_cdata_cachep = kmem_cache_create("nfs_commit_data",
 					     sizeof(struct nfs_commit_data),
 					     0, SLAB_HWCACHE_ALIGN,
 					     NULL);
 	if (nfs_cdata_cachep == NULL)
-		return -ENOMEM;
+		goto out_destroy_write_mempool;
 
 	nfs_commit_mempool = mempool_create_slab_pool(MIN_POOL_COMMIT,
 						      nfs_wdata_cachep);
 	if (nfs_commit_mempool == NULL)
-		return -ENOMEM;
+		goto out_destroy_commit_cache;
 
 	/*
 	 * NFS congestion size, scale with available memory.
@@ -1849,11 +1849,20 @@ int __init nfs_init_writepagecache(void)
 		nfs_congestion_kb = 256*1024;
 
 	return 0;
+
+out_destroy_commit_cache:
+	kmem_cache_destroy(nfs_cdata_cachep);
+out_destroy_write_mempool:
+	mempool_destroy(nfs_wdata_mempool);
+out_destroy_write_cache:
+	kmem_cache_destroy(nfs_wdata_cachep);
+	return -ENOMEM;
 }
 
 void nfs_destroy_writepagecache(void)
 {
 	mempool_destroy(nfs_commit_mempool);
+	kmem_cache_destroy(nfs_cdata_cachep);
 	mempool_destroy(nfs_wdata_mempool);
 	kmem_cache_destroy(nfs_wdata_cachep);
 }
diff --git a/fs/nfsd/nfs4callback.c b/fs/nfsd/nfs4callback.c
index cbaf4f8bb7b..4c7bd35b187 100644
--- a/fs/nfsd/nfs4callback.c
+++ b/fs/nfsd/nfs4callback.c
@@ -651,12 +651,12 @@ static int setup_callback_client(struct nfs4_client *clp, struct nfs4_cb_conn *c
 
 	if (clp->cl_minorversion == 0) {
 		if (!clp->cl_cred.cr_principal &&
-				(clp->cl_flavor >= RPC_AUTH_GSS_KRB5))
+				(clp->cl_cred.cr_flavor >= RPC_AUTH_GSS_KRB5))
 			return -EINVAL;
 		args.client_name = clp->cl_cred.cr_principal;
 		args.prognumber	= conn->cb_prog,
 		args.protocol = XPRT_TRANSPORT_TCP;
-		args.authflavor = clp->cl_flavor;
+		args.authflavor = clp->cl_cred.cr_flavor;
 		clp->cl_cb_ident = conn->cb_ident;
 	} else {
 		if (!conn->cb_xprt)
diff --git a/fs/nfsd/state.h b/fs/nfsd/state.h
index e6173147f98..22bd0a66c35 100644
--- a/fs/nfsd/state.h
+++ b/fs/nfsd/state.h
@@ -231,7 +231,6 @@ struct nfs4_client {
 	nfs4_verifier		cl_verifier; 	/* generated by client */
 	time_t                  cl_time;        /* time of last lease renewal */
 	struct sockaddr_storage	cl_addr; 	/* client ipaddress */
-	u32			cl_flavor;	/* setclientid pseudoflavor */
 	struct svc_cred		cl_cred; 	/* setclientid principal */
 	clientid_t		cl_clientid;	/* generated by server */
 	nfs4_verifier		cl_confirm;	/* generated by server */
diff --git a/fs/open.c b/fs/open.c
index bc132e167d2..e1f2cdb91a4 100644
--- a/fs/open.c
+++ b/fs/open.c
@@ -852,9 +852,10 @@ static inline int build_open_flags(int flags, umode_t mode, struct open_flags *o
 	int lookup_flags = 0;
 	int acc_mode;
 
-	if (!(flags & O_CREAT))
-		mode = 0;
-	op->mode = mode;
+	if (flags & O_CREAT)
+		op->mode = (mode & S_IALLUGO) | S_IFREG;
+	else
+		op->mode = 0;
 
 	/* Must never be set by userspace */
 	flags &= ~FMODE_NONOTIFY;
diff --git a/fs/proc/proc_sysctl.c b/fs/proc/proc_sysctl.c
index dfafeb2b05a..eb7cc91b725 100644
--- a/fs/proc/proc_sysctl.c
+++ b/fs/proc/proc_sysctl.c
@@ -462,9 +462,6 @@ static struct dentry *proc_sys_lookup(struct inode *dir, struct dentry *dentry,
 
 	err = ERR_PTR(-ENOMEM);
 	inode = proc_sys_make_inode(dir->i_sb, h ? h : head, p);
-	if (h)
-		sysctl_head_finish(h);
-
 	if (!inode)
 		goto out;
 
@@ -473,6 +470,8 @@ static struct dentry *proc_sys_lookup(struct inode *dir, struct dentry *dentry,
 	d_add(dentry, inode);
 
 out:
+	if (h)
+		sysctl_head_finish(h);
 	sysctl_head_finish(head);
 	return err;
 }
diff --git a/fs/quota/dquot.c b/fs/quota/dquot.c
index 36a29b753c7..c495a3055e2 100644
--- a/fs/quota/dquot.c
+++ b/fs/quota/dquot.c
@@ -1589,10 +1589,10 @@ int __dquot_alloc_space(struct inode *inode, qsize_t number, int flags)
 		goto out;
 	}
 
-	down_read(&sb_dqopt(inode->i_sb)->dqptr_sem);
 	for (cnt = 0; cnt < MAXQUOTAS; cnt++)
 		warn[cnt].w_type = QUOTA_NL_NOWARN;
 
+	down_read(&sb_dqopt(inode->i_sb)->dqptr_sem);
 	spin_lock(&dq_data_lock);
 	for (cnt = 0; cnt < MAXQUOTAS; cnt++) {
 		if (!dquots[cnt])
diff --git a/fs/reiserfs/bitmap.c b/fs/reiserfs/bitmap.c
index 4c0c7d163d1..a98b7740a0f 100644
--- a/fs/reiserfs/bitmap.c
+++ b/fs/reiserfs/bitmap.c
@@ -1334,9 +1334,7 @@ struct buffer_head *reiserfs_read_bitmap_block(struct super_block *sb,
 	else if (bitmap == 0)
 		block = (REISERFS_DISK_OFFSET_IN_BYTES >> sb->s_blocksize_bits) + 1;
 
-	reiserfs_write_unlock(sb);
 	bh = sb_bread(sb, block);
-	reiserfs_write_lock(sb);
 	if (bh == NULL)
 		reiserfs_warning(sb, "sh-2029: %s: bitmap block (#%u) "
 		                 "reading failed", __func__, block);
diff --git a/fs/reiserfs/inode.c b/fs/reiserfs/inode.c
index a6d4268fb6c..855da58db14 100644
--- a/fs/reiserfs/inode.c
+++ b/fs/reiserfs/inode.c
@@ -76,10 +76,10 @@ void reiserfs_evict_inode(struct inode *inode)
 		;
 	}
       out:
+	reiserfs_write_unlock_once(inode->i_sb, depth);
 	clear_inode(inode);	/* note this must go after the journal_end to prevent deadlock */
 	dquot_drop(inode);
 	inode->i_blocks = 0;
-	reiserfs_write_unlock_once(inode->i_sb, depth);
 	return;
 
 no_delete:
diff --git a/fs/stat.c b/fs/stat.c
index b6ff11825fc..40780229a03 100644
--- a/fs/stat.c
+++ b/fs/stat.c
@@ -58,7 +58,7 @@ EXPORT_SYMBOL(vfs_getattr);
 int vfs_fstat(unsigned int fd, struct kstat *stat)
 {
 	int fput_needed;
-	struct file *f = fget_light(fd, &fput_needed);
+	struct file *f = fget_raw_light(fd, &fput_needed);
 	int error = -EBADF;
 
 	if (f) {
diff --git a/fs/ubifs/debug.h b/fs/ubifs/debug.h
index 8b8cc4e945f..760de723dad 100644
--- a/fs/ubifs/debug.h
+++ b/fs/ubifs/debug.h
@@ -167,7 +167,7 @@ struct ubifs_global_debug_info {
 #define ubifs_dbg_msg(type, fmt, ...) \
 	pr_debug("UBIFS DBG " type ": " fmt "\n", ##__VA_ARGS__)
 
-#define DBG_KEY_BUF_LEN 32
+#define DBG_KEY_BUF_LEN 48
 #define ubifs_dbg_msg_key(type, key, fmt, ...) do {                            \
 	char __tmp_key_buf[DBG_KEY_BUF_LEN];                                   \
 	pr_debug("UBIFS DBG " type ": " fmt "%s\n", ##__VA_ARGS__,             \
diff --git a/fs/ubifs/lpt.c b/fs/ubifs/lpt.c
index ce33b2beb15..8640920766e 100644
--- a/fs/ubifs/lpt.c
+++ b/fs/ubifs/lpt.c
@@ -1749,7 +1749,10 @@ int ubifs_lpt_init(struct ubifs_info *c, int rd, int wr)
 	return 0;
 
 out_err:
-	ubifs_lpt_free(c, 0);
+	if (wr)
+		ubifs_lpt_free(c, 1);
+	if (rd)
+		ubifs_lpt_free(c, 0);
 	return err;
 }
 
diff --git a/fs/ubifs/recovery.c b/fs/ubifs/recovery.c
index c30d976b4be..edeec499c04 100644
--- a/fs/ubifs/recovery.c
+++ b/fs/ubifs/recovery.c
@@ -788,7 +788,7 @@ struct ubifs_scan_leb *ubifs_recover_leb(struct ubifs_info *c, int lnum,
 
 corrupted_rescan:
 	/* Re-scan the corrupted data with verbose messages */
-	ubifs_err("corruptio %d", ret);
+	ubifs_err("corruption %d", ret);
 	ubifs_scan_a_node(c, buf, len, lnum, offs, 1);
 corrupted:
 	ubifs_scanned_corruption(c, lnum, offs, buf);
diff --git a/fs/ubifs/replay.c b/fs/ubifs/replay.c
index eba46d4a761..94d78fc5d4e 100644
--- a/fs/ubifs/replay.c
+++ b/fs/ubifs/replay.c
@@ -1026,7 +1026,6 @@ int ubifs_replay_journal(struct ubifs_info *c)
 	c->replaying = 1;
 	lnum = c->ltail_lnum = c->lhead_lnum;
 
-	lnum = UBIFS_LOG_LNUM;
 	do {
 		err = replay_log_leb(c, lnum, 0, c->sbuf);
 		if (err == 1)
@@ -1035,7 +1034,7 @@ int ubifs_replay_journal(struct ubifs_info *c)
 		if (err)
 			goto out;
 		lnum = ubifs_next_log_lnum(c, lnum);
-	} while (lnum != UBIFS_LOG_LNUM);
+	} while (lnum != c->ltail_lnum);
 
 	err = replay_buds(c);
 	if (err)
diff --git a/fs/ubifs/super.c b/fs/ubifs/super.c
index c3fa6c5327a..71a197f0f93 100644
--- a/fs/ubifs/super.c
+++ b/fs/ubifs/super.c
@@ -1157,9 +1157,6 @@ static int check_free_space(struct ubifs_info *c)
  *
  * This function mounts UBIFS file system. Returns zero in case of success and
  * a negative error code in case of failure.
- *
- * Note, the function does not de-allocate resources it it fails half way
- * through, and the caller has to do this instead.
  */
 static int mount_ubifs(struct ubifs_info *c)
 {
diff --git a/fs/udf/file.c b/fs/udf/file.c
index 7f3f7ba3df6..d1c6093fd3d 100644
--- a/fs/udf/file.c
+++ b/fs/udf/file.c
@@ -39,20 +39,24 @@
 #include "udf_i.h"
 #include "udf_sb.h"
 
-static int udf_adinicb_readpage(struct file *file, struct page *page)
+static void __udf_adinicb_readpage(struct page *page)
 {
 	struct inode *inode = page->mapping->host;
 	char *kaddr;
 	struct udf_inode_info *iinfo = UDF_I(inode);
 
-	BUG_ON(!PageLocked(page));
-
 	kaddr = kmap(page);
-	memset(kaddr, 0, PAGE_CACHE_SIZE);
 	memcpy(kaddr, iinfo->i_ext.i_data + iinfo->i_lenEAttr, inode->i_size);
+	memset(kaddr + inode->i_size, 0, PAGE_CACHE_SIZE - inode->i_size);
 	flush_dcache_page(page);
 	SetPageUptodate(page);
 	kunmap(page);
+}
+
+static int udf_adinicb_readpage(struct file *file, struct page *page)
+{
+	BUG_ON(!PageLocked(page));
+	__udf_adinicb_readpage(page);
 	unlock_page(page);
 
 	return 0;
@@ -77,6 +81,25 @@ static int udf_adinicb_writepage(struct page *page,
 	return 0;
 }
 
+static int udf_adinicb_write_begin(struct file *file,
+			struct address_space *mapping, loff_t pos,
+			unsigned len, unsigned flags, struct page **pagep,
+			void **fsdata)
+{
+	struct page *page;
+
+	if (WARN_ON_ONCE(pos >= PAGE_CACHE_SIZE))
+		return -EIO;
+	page = grab_cache_page_write_begin(mapping, 0, flags);
+	if (!page)
+		return -ENOMEM;
+	*pagep = page;
+
+	if (!PageUptodate(page) && len != PAGE_CACHE_SIZE)
+		__udf_adinicb_readpage(page);
+	return 0;
+}
+
 static int udf_adinicb_write_end(struct file *file,
 			struct address_space *mapping,
 			loff_t pos, unsigned len, unsigned copied,
@@ -98,8 +121,8 @@ static int udf_adinicb_write_end(struct file *file,
 const struct address_space_operations udf_adinicb_aops = {
 	.readpage	= udf_adinicb_readpage,
 	.writepage	= udf_adinicb_writepage,
-	.write_begin = simple_write_begin,
-	.write_end = udf_adinicb_write_end,
+	.write_begin	= udf_adinicb_write_begin,
+	.write_end	= udf_adinicb_write_end,
 };
 
 static ssize_t udf_file_aio_write(struct kiocb *iocb, const struct iovec *iov,
diff --git a/fs/udf/inode.c b/fs/udf/inode.c
index fafaad795cd..aa233469b3c 100644
--- a/fs/udf/inode.c
+++ b/fs/udf/inode.c
@@ -1124,14 +1124,17 @@ int udf_setsize(struct inode *inode, loff_t newsize)
 				if (err)
 					return err;
 				down_write(&iinfo->i_data_sem);
-			} else
+			} else {
 				iinfo->i_lenAlloc = newsize;
+				goto set_size;
+			}
 		}
 		err = udf_extend_file(inode, newsize);
 		if (err) {
 			up_write(&iinfo->i_data_sem);
 			return err;
 		}
+set_size:
 		truncate_setsize(inode, newsize);
 		up_write(&iinfo->i_data_sem);
 	} else {
diff --git a/fs/udf/super.c b/fs/udf/super.c
index dcbf98722af..18fc038a438 100644
--- a/fs/udf/super.c
+++ b/fs/udf/super.c
@@ -1344,6 +1344,7 @@ static int udf_load_logicalvol(struct super_block *sb, sector_t block,
 		udf_err(sb, "error loading logical volume descriptor: "
 			"Partition table too long (%u > %lu)\n", table_len,
 			sb->s_blocksize - sizeof(*lvd));
+		ret = 1;
 		goto out_bh;
 	}
 
@@ -1388,8 +1389,10 @@ static int udf_load_logicalvol(struct super_block *sb, sector_t block,
 						UDF_ID_SPARABLE,
 						strlen(UDF_ID_SPARABLE))) {
 				if (udf_load_sparable_map(sb, map,
-				    (struct sparablePartitionMap *)gpm) < 0)
+				    (struct sparablePartitionMap *)gpm) < 0) {
+					ret = 1;
 					goto out_bh;
+				}
 			} else if (!strncmp(upm2->partIdent.ident,
 						UDF_ID_METADATA,
 						strlen(UDF_ID_METADATA))) {
@@ -2000,6 +2003,8 @@ static int udf_fill_super(struct super_block *sb, void *options, int silent)
 			if (!silent)
 				pr_notice("Rescanning with blocksize %d\n",
 					  UDF_DEFAULT_BLOCKSIZE);
+			brelse(sbi->s_lvid_bh);
+			sbi->s_lvid_bh = NULL;
 			uopt.blocksize = UDF_DEFAULT_BLOCKSIZE;
 			ret = udf_load_vrs(sb, &uopt, silent, &fileset);
 		}
diff --git a/fs/xfs/xfs_buf.c b/fs/xfs/xfs_buf.c
index d7a9dd735e1..933b7930b86 100644
--- a/fs/xfs/xfs_buf.c
+++ b/fs/xfs/xfs_buf.c
@@ -96,6 +96,7 @@ xfs_buf_lru_add(
 		atomic_inc(&bp->b_hold);
 		list_add_tail(&bp->b_lru, &btp->bt_lru);
 		btp->bt_lru_nr++;
+		bp->b_lru_flags &= ~_XBF_LRU_DISPOSE;
 	}
 	spin_unlock(&btp->bt_lru_lock);
 }
@@ -154,7 +155,8 @@ xfs_buf_stale(
 		struct xfs_buftarg *btp = bp->b_target;
 
 		spin_lock(&btp->bt_lru_lock);
-		if (!list_empty(&bp->b_lru)) {
+		if (!list_empty(&bp->b_lru) &&
+		    !(bp->b_lru_flags & _XBF_LRU_DISPOSE)) {
 			list_del_init(&bp->b_lru);
 			btp->bt_lru_nr--;
 			atomic_dec(&bp->b_hold);
@@ -1501,6 +1503,7 @@ xfs_buftarg_shrink(
 		 */
 		list_move(&bp->b_lru, &dispose);
 		btp->bt_lru_nr--;
+		bp->b_lru_flags |= _XBF_LRU_DISPOSE;
 	}
 	spin_unlock(&btp->bt_lru_lock);
 
diff --git a/fs/xfs/xfs_buf.h b/fs/xfs/xfs_buf.h
index d03b73b9604..7c0b6a0a155 100644
--- a/fs/xfs/xfs_buf.h
+++ b/fs/xfs/xfs_buf.h
@@ -38,27 +38,28 @@ typedef enum {
 	XBRW_ZERO = 3,			/* Zero target memory */
 } xfs_buf_rw_t;
 
-#define XBF_READ	(1 << 0) /* buffer intended for reading from device */
-#define XBF_WRITE	(1 << 1) /* buffer intended for writing to device */
-#define XBF_READ_AHEAD	(1 << 2) /* asynchronous read-ahead */
-#define XBF_ASYNC	(1 << 4) /* initiator will not wait for completion */
-#define XBF_DONE	(1 << 5) /* all pages in the buffer uptodate */
-#define XBF_STALE	(1 << 6) /* buffer has been staled, do not find it */
+#define XBF_READ	 (1 << 0) /* buffer intended for reading from device */
+#define XBF_WRITE	 (1 << 1) /* buffer intended for writing to device */
+#define XBF_READ_AHEAD	 (1 << 2) /* asynchronous read-ahead */
+#define XBF_ASYNC	 (1 << 4) /* initiator will not wait for completion */
+#define XBF_DONE	 (1 << 5) /* all pages in the buffer uptodate */
+#define XBF_STALE	 (1 << 6) /* buffer has been staled, do not find it */
 
 /* I/O hints for the BIO layer */
-#define XBF_SYNCIO	(1 << 10)/* treat this buffer as synchronous I/O */
-#define XBF_FUA		(1 << 11)/* force cache write through mode */
-#define XBF_FLUSH	(1 << 12)/* flush the disk cache before a write */
+#define XBF_SYNCIO	 (1 << 10)/* treat this buffer as synchronous I/O */
+#define XBF_FUA		 (1 << 11)/* force cache write through mode */
+#define XBF_FLUSH	 (1 << 12)/* flush the disk cache before a write */
 
 /* flags used only as arguments to access routines */
-#define XBF_TRYLOCK	(1 << 16)/* lock requested, but do not wait */
-#define XBF_UNMAPPED	(1 << 17)/* do not map the buffer */
+#define XBF_TRYLOCK	 (1 << 16)/* lock requested, but do not wait */
+#define XBF_UNMAPPED	 (1 << 17)/* do not map the buffer */
 
 /* flags used only internally */
-#define _XBF_PAGES	(1 << 20)/* backed by refcounted pages */
-#define _XBF_KMEM	(1 << 21)/* backed by heap memory */
-#define _XBF_DELWRI_Q	(1 << 22)/* buffer on a delwri queue */
-#define _XBF_COMPOUND	(1 << 23)/* compound buffer */
+#define _XBF_PAGES	 (1 << 20)/* backed by refcounted pages */
+#define _XBF_KMEM	 (1 << 21)/* backed by heap memory */
+#define _XBF_DELWRI_Q	 (1 << 22)/* buffer on a delwri queue */
+#define _XBF_COMPOUND	 (1 << 23)/* compound buffer */
+#define _XBF_LRU_DISPOSE (1 << 24)/* buffer being discarded */
 
 typedef unsigned int xfs_buf_flags_t;
 
@@ -72,12 +73,13 @@ typedef unsigned int xfs_buf_flags_t;
 	{ XBF_SYNCIO,		"SYNCIO" }, \
 	{ XBF_FUA,		"FUA" }, \
 	{ XBF_FLUSH,		"FLUSH" }, \
-	{ XBF_TRYLOCK,		"TRYLOCK" }, 	/* should never be set */\
+	{ XBF_TRYLOCK,		"TRYLOCK" },	/* should never be set */\
 	{ XBF_UNMAPPED,		"UNMAPPED" },	/* ditto */\
 	{ _XBF_PAGES,		"PAGES" }, \
 	{ _XBF_KMEM,		"KMEM" }, \
 	{ _XBF_DELWRI_Q,	"DELWRI_Q" }, \
-	{ _XBF_COMPOUND,	"COMPOUND" }
+	{ _XBF_COMPOUND,	"COMPOUND" }, \
+	{ _XBF_LRU_DISPOSE,	"LRU_DISPOSE" }
 
 typedef struct xfs_buftarg {
 	dev_t			bt_dev;
@@ -124,7 +126,12 @@ typedef struct xfs_buf {
 	xfs_buf_flags_t		b_flags;	/* status flags */
 	struct semaphore	b_sema;		/* semaphore for lockables */
 
+	/*
+	 * concurrent access to b_lru and b_lru_flags are protected by
+	 * bt_lru_lock and not by b_sema
+	 */
 	struct list_head	b_lru;		/* lru list */
+	xfs_buf_flags_t		b_lru_flags;	/* internal lru status flags */
 	wait_queue_head_t	b_waiters;	/* unpin waiters */
 	struct list_head	b_list;
 	struct xfs_perag	*b_pag;		/* contains rbtree root */
diff --git a/fs/xfs/xfs_discard.c b/fs/xfs/xfs_discard.c
index f9c3fe304a1..69cf4fcde03 100644
--- a/fs/xfs/xfs_discard.c
+++ b/fs/xfs/xfs_discard.c
@@ -179,12 +179,14 @@ xfs_ioc_trim(
 	 * used by the fstrim application.  In the end it really doesn't
 	 * matter as trimming blocks is an advisory interface.
 	 */
+	if (range.start >= XFS_FSB_TO_B(mp, mp->m_sb.sb_dblocks) ||
+	    range.minlen > XFS_FSB_TO_B(mp, XFS_ALLOC_AG_MAX_USABLE(mp)))
+		return -XFS_ERROR(EINVAL);
+
 	start = BTOBB(range.start);
 	end = start + BTOBBT(range.len) - 1;
 	minlen = BTOBB(max_t(u64, granularity, range.minlen));
 
-	if (XFS_BB_TO_FSB(mp, start) >= mp->m_sb.sb_dblocks)
-		return -XFS_ERROR(EINVAL);
 	if (end > XFS_FSB_TO_BB(mp, mp->m_sb.sb_dblocks) - 1)
 		end = XFS_FSB_TO_BB(mp, mp->m_sb.sb_dblocks)- 1;
 
diff --git a/fs/xfs/xfs_ialloc.c b/fs/xfs/xfs_ialloc.c
index 21e37b55f7e..5aceb3f8ecd 100644
--- a/fs/xfs/xfs_ialloc.c
+++ b/fs/xfs/xfs_ialloc.c
@@ -962,23 +962,22 @@ xfs_dialloc(
 		if (!pag->pagi_freecount && !okalloc)
 			goto nextag;
 
+		/*
+		 * Then read in the AGI buffer and recheck with the AGI buffer
+		 * lock held.
+		 */
 		error = xfs_ialloc_read_agi(mp, tp, agno, &agbp);
 		if (error)
 			goto out_error;
 
-		/*
-		 * Once the AGI has been read in we have to recheck
-		 * pagi_freecount with the AGI buffer lock held.
-		 */
 		if (pag->pagi_freecount) {
 			xfs_perag_put(pag);
 			goto out_alloc;
 		}
 
-		if (!okalloc) {
-			xfs_trans_brelse(tp, agbp);
-			goto nextag;
-		}
+		if (!okalloc)
+			goto nextag_relse_buffer;
+
 
 		error = xfs_ialloc_ag_alloc(tp, agbp, &ialloced);
 		if (error) {
@@ -1007,6 +1006,8 @@ xfs_dialloc(
 			return 0;
 		}
 
+nextag_relse_buffer:
+		xfs_trans_brelse(tp, agbp);
 nextag:
 		xfs_perag_put(pag);
 		if (++agno == mp->m_sb.sb_agcount)
diff --git a/fs/xfs/xfs_rtalloc.c b/fs/xfs/xfs_rtalloc.c
index 92d4331cd4f..ca28a4ba4b5 100644
--- a/fs/xfs/xfs_rtalloc.c
+++ b/fs/xfs/xfs_rtalloc.c
@@ -857,7 +857,7 @@ xfs_rtbuf_get(
 	xfs_buf_t	*bp;		/* block buffer, result */
 	xfs_inode_t	*ip;		/* bitmap or summary inode */
 	xfs_bmbt_irec_t	map;
-	int		nmap;
+	int		nmap = 1;
 	int		error;		/* error value */
 
 	ip = issum ? mp->m_rsumip : mp->m_rbmip;
diff --git a/fs/xfs/xfs_super.c b/fs/xfs/xfs_super.c
index bdaf4cb9f4a..19e2380fb86 100644
--- a/fs/xfs/xfs_super.c
+++ b/fs/xfs/xfs_super.c
@@ -919,6 +919,7 @@ xfs_fs_put_super(
 	struct xfs_mount	*mp = XFS_M(sb);
 
 	xfs_filestream_unmount(mp);
+	cancel_delayed_work_sync(&mp->m_sync_work);
 	xfs_unmountfs(mp);
 	xfs_syncd_stop(mp);
 	xfs_freesb(mp);