75 files changed, 1234 insertions, 723 deletions

diff --git a/fs/block_dev.c b/fs/block_dev.c
index 333a7bb4cb9c..4fb8a3431531 100644
--- a/fs/block_dev.c
+++ b/fs/block_dev.c
@@ -1215,12 +1215,6 @@ int blkdev_get(struct block_device *bdev, fmode_t mode, void *holder)
 
         res = __blkdev_get(bdev, mode, 0);
 
-        /* __blkdev_get() may alter read only status, check it afterwards */
-        if (!res && (mode & FMODE_WRITE) && bdev_read_only(bdev)) {
-                __blkdev_put(bdev, mode, 0);
-                res = -EACCES;
-        }
-
         if (whole) {
                 /* finish claiming */
                 mutex_lock(&bdev->bd_mutex);
@@ -1298,6 +1292,11 @@ struct block_device *blkdev_get_by_path(const char *path, fmode_t mode,
         if (err)
                 return ERR_PTR(err);
 
+        if ((mode & FMODE_WRITE) && bdev_read_only(bdev)) {
+                blkdev_put(bdev, mode);
+                return ERR_PTR(-EACCES);
+        }
+
         return bdev;
 }
 EXPORT_SYMBOL(blkdev_get_by_path);
diff --git a/fs/btrfs/acl.c b/fs/btrfs/acl.c
index 15b5ca2a2606..9c949348510b 100644
--- a/fs/btrfs/acl.c
+++ b/fs/btrfs/acl.c
@@ -37,6 +37,9 @@ static struct posix_acl *btrfs_get_acl(struct inode *inode, int type)
         char *value = NULL;
         struct posix_acl *acl;
 
+        if (!IS_POSIXACL(inode))
+                return NULL;
+
         acl = get_cached_acl(inode, type);
         if (acl != ACL_NOT_CACHED)
                 return acl;
@@ -84,6 +87,9 @@ static int btrfs_xattr_acl_get(struct dentry *dentry, const char *name,
         struct posix_acl *acl;
         int ret = 0;
 
+        if (!IS_POSIXACL(dentry->d_inode))
+                return -EOPNOTSUPP;
+
         acl = btrfs_get_acl(dentry->d_inode, type);
 
         if (IS_ERR(acl))
diff --git a/fs/btrfs/compression.c b/fs/btrfs/compression.c
index f745287fbf2e..4d2110eafe29 100644
--- a/fs/btrfs/compression.c
+++ b/fs/btrfs/compression.c
@@ -562,7 +562,7 @@ int btrfs_submit_compressed_read(struct inode *inode, struct bio *bio,
         u64 em_len;
         u64 em_start;
         struct extent_map *em;
-        int ret;
+        int ret = -ENOMEM;
         u32 *sums;
 
         tree = &BTRFS_I(inode)->io_tree;
@@ -577,6 +577,9 @@ int btrfs_submit_compressed_read(struct inode *inode, struct bio *bio,
 
         compressed_len = em->block_len;
         cb = kmalloc(compressed_bio_size(root, compressed_len), GFP_NOFS);
+        if (!cb)
+                goto out;
+
         atomic_set(&cb->pending_bios, 0);
         cb->errors = 0;
         cb->inode = inode;
@@ -597,13 +600,18 @@ int btrfs_submit_compressed_read(struct inode *inode, struct bio *bio,
 
         nr_pages = (compressed_len + PAGE_CACHE_SIZE - 1) /
                                  PAGE_CACHE_SIZE;
-        cb->compressed_pages = kmalloc(sizeof(struct page *) * nr_pages,
+        cb->compressed_pages = kzalloc(sizeof(struct page *) * nr_pages,
                                        GFP_NOFS);
+        if (!cb->compressed_pages)
+                goto fail1;
+
         bdev = BTRFS_I(inode)->root->fs_info->fs_devices->latest_bdev;
 
         for (page_index = 0; page_index < nr_pages; page_index++) {
                 cb->compressed_pages[page_index] = alloc_page(GFP_NOFS |
                                                               __GFP_HIGHMEM);
+                if (!cb->compressed_pages[page_index])
+                        goto fail2;
         }
         cb->nr_pages = nr_pages;
 
@@ -614,6 +622,8 @@ int btrfs_submit_compressed_read(struct inode *inode, struct bio *bio,
         cb->len = uncompressed_len;
 
         comp_bio = compressed_bio_alloc(bdev, cur_disk_byte, GFP_NOFS);
+        if (!comp_bio)
+                goto fail2;
         comp_bio->bi_private = cb;
         comp_bio->bi_end_io = end_compressed_bio_read;
         atomic_inc(&cb->pending_bios);
@@ -681,6 +691,17 @@ int btrfs_submit_compressed_read(struct inode *inode, struct bio *bio,
 
         bio_put(comp_bio);
         return 0;
+
+fail2:
+        for (page_index = 0; page_index < nr_pages; page_index++)
+                free_page((unsigned long)cb->compressed_pages[page_index]);
+
+        kfree(cb->compressed_pages);
+fail1:
+        kfree(cb);
+out:
+        free_extent_map(em);
+        return ret;
 }
 
 static struct list_head comp_idle_workspace[BTRFS_COMPRESS_TYPES];
@@ -900,7 +921,7 @@ int btrfs_decompress(int type, unsigned char *data_in, struct page *dest_page,
         return ret;
 }
 
-void __exit btrfs_exit_compress(void)
+void btrfs_exit_compress(void)
 {
         free_workspaces();
 }
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index b531c36455d8..e1aa8d607bc7 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -359,10 +359,14 @@ static int csum_dirty_buffer(struct btrfs_root *root, struct page *page)
 
         tree = &BTRFS_I(page->mapping->host)->io_tree;
 
-        if (page->private == EXTENT_PAGE_PRIVATE)
+        if (page->private == EXTENT_PAGE_PRIVATE) {
+                WARN_ON(1);
                 goto out;
-        if (!page->private)
+        }
+        if (!page->private) {
+                WARN_ON(1);
                 goto out;
+        }
         len = page->private >> 2;
         WARN_ON(len == 0);
 
@@ -1550,6 +1554,7 @@ static int transaction_kthread(void *arg)
                 spin_unlock(&root->fs_info->new_trans_lock);
 
                 trans = btrfs_join_transaction(root, 1);
+                BUG_ON(IS_ERR(trans));
                 if (transid == trans->transid) {
                         ret = btrfs_commit_transaction(trans, root);
                         BUG_ON(ret);
@@ -2453,10 +2458,14 @@ int btrfs_commit_super(struct btrfs_root *root)
         up_write(&root->fs_info->cleanup_work_sem);
 
         trans = btrfs_join_transaction(root, 1);
+        if (IS_ERR(trans))
+                return PTR_ERR(trans);
         ret = btrfs_commit_transaction(trans, root);
         BUG_ON(ret);
         /* run commit again to drop the original snapshot */
         trans = btrfs_join_transaction(root, 1);
+        if (IS_ERR(trans))
+                return PTR_ERR(trans);
         btrfs_commit_transaction(trans, root);
         ret = btrfs_write_and_wait_transaction(NULL, root);
         BUG_ON(ret);
@@ -2554,6 +2563,8 @@ int close_ctree(struct btrfs_root *root)
         kfree(fs_info->chunk_root);
         kfree(fs_info->dev_root);
         kfree(fs_info->csum_root);
+        kfree(fs_info);
+
         return 0;
 }
 
diff --git a/fs/btrfs/export.c b/fs/btrfs/export.c
index 9786963b07e5..ff27d7a477b2 100644
--- a/fs/btrfs/export.c
+++ b/fs/btrfs/export.c
@@ -171,6 +171,8 @@ static struct dentry *btrfs_get_parent(struct dentry *child)
         int ret;
 
         path = btrfs_alloc_path();
+        if (!path)
+                return ERR_PTR(-ENOMEM);
 
         if (dir->i_ino == BTRFS_FIRST_FREE_OBJECTID) {
                 key.objectid = root->root_key.objectid;
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index b55269340cec..f3c96fc01439 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -320,11 +320,6 @@ static int caching_kthread(void *data)
         if (!path)
                 return -ENOMEM;
 
-        exclude_super_stripes(extent_root, block_group);
-        spin_lock(&block_group->space_info->lock);
-        block_group->space_info->bytes_readonly += block_group->bytes_super;
-        spin_unlock(&block_group->space_info->lock);
-
         last = max_t(u64, block_group->key.objectid, BTRFS_SUPER_INFO_OFFSET);
 
         /*
@@ -467,8 +462,10 @@ static int cache_block_group(struct btrfs_block_group_cache *cache,
                         cache->cached = BTRFS_CACHE_NO;
                 }
                 spin_unlock(&cache->lock);
-                if (ret == 1)
+                if (ret == 1) {
+                        free_excluded_extents(fs_info->extent_root, cache);
                         return 0;
+                }
         }
 
         if (load_cache_only)
@@ -3344,8 +3341,10 @@ static int shrink_delalloc(struct btrfs_trans_handle *trans,
         u64 reserved;
         u64 max_reclaim;
         u64 reclaimed = 0;
+        long time_left;
         int pause = 1;
         int nr_pages = (2 * 1024 * 1024) >> PAGE_CACHE_SHIFT;
+        int loops = 0;
 
         block_rsv = &root->fs_info->delalloc_block_rsv;
         space_info = block_rsv->space_info;
@@ -3358,7 +3357,7 @@ static int shrink_delalloc(struct btrfs_trans_handle *trans,
 
         max_reclaim = min(reserved, to_reclaim);
 
-        while (1) {
+        while (loops < 1024) {
                 /* have the flusher threads jump in and do some IO */
                 smp_mb();
                 nr_pages = min_t(unsigned long, nr_pages,
@@ -3366,8 +3365,12 @@ static int shrink_delalloc(struct btrfs_trans_handle *trans,
                 writeback_inodes_sb_nr_if_idle(root->fs_info->sb, nr_pages);
 
                 spin_lock(&space_info->lock);
-                if (reserved > space_info->bytes_reserved)
+                if (reserved > space_info->bytes_reserved) {
+                        loops = 0;
                         reclaimed += reserved - space_info->bytes_reserved;
+                } else {
+                        loops++;
+                }
                 reserved = space_info->bytes_reserved;
                 spin_unlock(&space_info->lock);
 
@@ -3378,7 +3381,12 @@ static int shrink_delalloc(struct btrfs_trans_handle *trans,
                         return -EAGAIN;
 
                 __set_current_state(TASK_INTERRUPTIBLE);
-                schedule_timeout(pause);
+                time_left = schedule_timeout(pause);
+
+                /* We were interrupted, exit */
+                if (time_left)
+                        break;
+
                 pause <<= 1;
                 if (pause > HZ / 10)
                         pause = HZ / 10;
@@ -3588,8 +3596,20 @@ void block_rsv_release_bytes(struct btrfs_block_rsv *block_rsv,
 
         if (num_bytes > 0) {
                 if (dest) {
-                        block_rsv_add_bytes(dest, num_bytes, 0);
-                } else {
+                        spin_lock(&dest->lock);
+                        if (!dest->full) {
+                                u64 bytes_to_add;
+
+                                bytes_to_add = dest->size - dest->reserved;
+                                bytes_to_add = min(num_bytes, bytes_to_add);
+                                dest->reserved += bytes_to_add;
+                                if (dest->reserved >= dest->size)
+                                        dest->full = 1;
+                                num_bytes -= bytes_to_add;
+                        }
+                        spin_unlock(&dest->lock);
+                }
+                if (num_bytes) {
                         spin_lock(&space_info->lock);
                         space_info->bytes_reserved -= num_bytes;
                         spin_unlock(&space_info->lock);
@@ -4012,6 +4032,7 @@ void btrfs_delalloc_release_metadata(struct inode *inode, u64 num_bytes)
 
         num_bytes = ALIGN(num_bytes, root->sectorsize);
         atomic_dec(&BTRFS_I(inode)->outstanding_extents);
+        WARN_ON(atomic_read(&BTRFS_I(inode)->outstanding_extents) < 0);
 
         spin_lock(&BTRFS_I(inode)->accounting_lock);
         nr_extents = atomic_read(&BTRFS_I(inode)->outstanding_extents);
@@ -5633,6 +5654,7 @@ use_block_rsv(struct btrfs_trans_handle *trans,
               struct btrfs_root *root, u32 blocksize)
 {
         struct btrfs_block_rsv *block_rsv;
+        struct btrfs_block_rsv *global_rsv = &root->fs_info->global_block_rsv;
         int ret;
 
         block_rsv = get_block_rsv(trans, root);
@@ -5640,14 +5662,39 @@ use_block_rsv(struct btrfs_trans_handle *trans,
         if (block_rsv->size == 0) {
                 ret = reserve_metadata_bytes(trans, root, block_rsv,
                                              blocksize, 0);
-                if (ret)
+                /*
+                 * If we couldn't reserve metadata bytes try and use some from
+                 * the global reserve.
+                 */
+                if (ret && block_rsv != global_rsv) {
+                        ret = block_rsv_use_bytes(global_rsv, blocksize);
+                        if (!ret)
+                                return global_rsv;
+                        return ERR_PTR(ret);
+                } else if (ret) {
                         return ERR_PTR(ret);
+                }
                 return block_rsv;
         }
 
         ret = block_rsv_use_bytes(block_rsv, blocksize);
         if (!ret)
                 return block_rsv;
+        if (ret) {
+                WARN_ON(1);
+                ret = reserve_metadata_bytes(trans, root, block_rsv, blocksize,
+                                             0);
+                if (!ret) {
+                        spin_lock(&block_rsv->lock);
+                        block_rsv->size += blocksize;
+                        spin_unlock(&block_rsv->lock);
+                        return block_rsv;
+                } else if (ret && block_rsv != global_rsv) {
+                        ret = block_rsv_use_bytes(global_rsv, blocksize);
+                        if (!ret)
+                                return global_rsv;
+                }
+        }
 
         return ERR_PTR(-ENOSPC);
 }
@@ -6221,6 +6268,8 @@ int btrfs_drop_snapshot(struct btrfs_root *root,
         BUG_ON(!wc);
 
         trans = btrfs_start_transaction(tree_root, 0);
+        BUG_ON(IS_ERR(trans));
+
         if (block_rsv)
                 trans->block_rsv = block_rsv;
 
@@ -6318,6 +6367,7 @@ int btrfs_drop_snapshot(struct btrfs_root *root,
 
                         btrfs_end_transaction_throttle(trans, tree_root);
                         trans = btrfs_start_transaction(tree_root, 0);
+                        BUG_ON(IS_ERR(trans));
                         if (block_rsv)
                                 trans->block_rsv = block_rsv;
                 }
@@ -6446,6 +6496,8 @@ static noinline int relocate_inode_pages(struct inode *inode, u64 start,
         int ret = 0;
 
         ra = kzalloc(sizeof(*ra), GFP_NOFS);
+        if (!ra)
+                return -ENOMEM;
 
         mutex_lock(&inode->i_mutex);
         first_index = start >> PAGE_CACHE_SHIFT;
@@ -6531,7 +6583,7 @@ static noinline int relocate_data_extent(struct inode *reloc_inode,
         u64 end = start + extent_key->offset - 1;
 
         em = alloc_extent_map(GFP_NOFS);
-        BUG_ON(!em || IS_ERR(em));
+        BUG_ON(!em);
 
         em->start = start;
         em->len = extent_key->offset;
@@ -7477,7 +7529,7 @@ int btrfs_drop_dead_reloc_roots(struct btrfs_root *root)
                 BUG_ON(reloc_root->commit_root != NULL);
                 while (1) {
                         trans = btrfs_join_transaction(root, 1);
-                        BUG_ON(!trans);
+                        BUG_ON(IS_ERR(trans));
 
                         mutex_lock(&root->fs_info->drop_mutex);
                         ret = btrfs_drop_snapshot(trans, reloc_root);
@@ -7535,7 +7587,7 @@ int btrfs_cleanup_reloc_trees(struct btrfs_root *root)
 
         if (found) {
                 trans = btrfs_start_transaction(root, 1);
-                BUG_ON(!trans);
+                BUG_ON(IS_ERR(trans));
                 ret = btrfs_commit_transaction(trans, root);
                 BUG_ON(ret);
         }
@@ -7779,7 +7831,7 @@ static noinline int relocate_one_extent(struct btrfs_root *extent_root,
 
 
         trans = btrfs_start_transaction(extent_root, 1);
-        BUG_ON(!trans);
+        BUG_ON(IS_ERR(trans));
 
         if (extent_key->objectid == 0) {
                 ret = del_extent_zero(trans, extent_root, path, extent_key);
@@ -8270,6 +8322,13 @@ int btrfs_free_block_groups(struct btrfs_fs_info *info)
                 if (block_group->cached == BTRFS_CACHE_STARTED)
                         wait_block_group_cache_done(block_group);
 
+                /*
+                 * We haven't cached this block group, which means we could
+                 * possibly have excluded extents on this block group.
+                 */
+                if (block_group->cached == BTRFS_CACHE_NO)
+                        free_excluded_extents(info->extent_root, block_group);
+
                 btrfs_remove_free_space_cache(block_group);
                 btrfs_put_block_group(block_group);
 
@@ -8385,6 +8444,13 @@ int btrfs_read_block_groups(struct btrfs_root *root)
                 cache->sectorsize = root->sectorsize;
 
                 /*
+                 * We need to exclude the super stripes now so that the space
+                 * info has super bytes accounted for, otherwise we'll think
+                 * we have more space than we actually do.
+                 */
+                exclude_super_stripes(root, cache);
+
+                /*
                  * check for two cases, either we are full, and therefore
                  * don't need to bother with the caching work since we won't
                  * find any space, or we are empty, and we can just add all
@@ -8392,12 +8458,10 @@ int btrfs_read_block_groups(struct btrfs_root *root)
                  * time, particularly in the full case.
                  */
                 if (found_key.offset == btrfs_block_group_used(&cache->item)) {
-                        exclude_super_stripes(root, cache);
                         cache->last_byte_to_unpin = (u64)-1;
                         cache->cached = BTRFS_CACHE_FINISHED;
                         free_excluded_extents(root, cache);
                 } else if (btrfs_block_group_used(&cache->item) == 0) {
-                        exclude_super_stripes(root, cache);
                         cache->last_byte_to_unpin = (u64)-1;
                         cache->cached = BTRFS_CACHE_FINISHED;
                         add_new_free_space(cache, root->fs_info,
diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index 2e993cf1766e..92ac5192c518 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -1865,7 +1865,7 @@ static int submit_one_bio(int rw, struct bio *bio, int mirror_num,
         bio_get(bio);
 
         if (tree->ops && tree->ops->submit_bio_hook)
-                tree->ops->submit_bio_hook(page->mapping->host, rw, bio,
+                ret = tree->ops->submit_bio_hook(page->mapping->host, rw, bio,
                                            mirror_num, bio_flags, start);
         else
                 submit_bio(rw, bio);
@@ -1920,6 +1920,8 @@ static int submit_extent_page(int rw, struct extent_io_tree *tree,
                 nr = bio_get_nr_vecs(bdev);
 
         bio = btrfs_bio_alloc(bdev, sector, nr, GFP_NOFS | __GFP_HIGH);
+        if (!bio)
+                return -ENOMEM;
 
         bio_add_page(bio, page, page_size, offset);
         bio->bi_end_io = end_io_func;
@@ -1944,6 +1946,7 @@ void set_page_extent_mapped(struct page *page)
 
 static void set_page_extent_head(struct page *page, unsigned long len)
 {
+        WARN_ON(!PagePrivate(page));
         set_page_private(page, EXTENT_PAGE_PRIVATE_FIRST_PAGE | len << 2);
 }
 
@@ -2126,7 +2129,7 @@ int extent_read_full_page(struct extent_io_tree *tree, struct page *page,
         ret = __extent_read_full_page(tree, page, get_extent, &bio, 0,
                                       &bio_flags);
         if (bio)
-                submit_one_bio(READ, bio, 0, bio_flags);
+                ret = submit_one_bio(READ, bio, 0, bio_flags);
         return ret;
 }
 
@@ -2819,9 +2822,17 @@ int try_release_extent_state(struct extent_map_tree *map,
                  * at this point we can safely clear everything except the
                  * locked bit and the nodatasum bit
                  */
-                clear_extent_bit(tree, start, end,
+                ret = clear_extent_bit(tree, start, end,
                                  ~(EXTENT_LOCKED | EXTENT_NODATASUM),
                                  0, 0, NULL, mask);
+
+                /* if clear_extent_bit failed for enomem reasons,
+                 * we can't allow the release to continue.
+                 */
+                if (ret < 0)
+                        ret = 0;
+                else
+                        ret = 1;
         }
         return ret;
 }
@@ -3192,7 +3203,13 @@ struct extent_buffer *alloc_extent_buffer(struct extent_io_tree *tree,
                 }
                 if (!PageUptodate(p))
                         uptodate = 0;
-                unlock_page(p);
+
+                /*
+                 * see below about how we avoid a nasty race with release page
+                 * and why we unlock later
+                 */
+                if (i != 0)
+                        unlock_page(p);
         }
         if (uptodate)
                 set_bit(EXTENT_BUFFER_UPTODATE, &eb->bflags);
@@ -3216,9 +3233,26 @@ struct extent_buffer *alloc_extent_buffer(struct extent_io_tree *tree,
         atomic_inc(&eb->refs);
         spin_unlock(&tree->buffer_lock);
         radix_tree_preload_end();
+
+        /*
+         * there is a race where release page may have
+         * tried to find this extent buffer in the radix
+         * but failed.  It will tell the VM it is safe to
+         * reclaim the, and it will clear the page private bit.
+         * We must make sure to set the page private bit properly
+         * after the extent buffer is in the radix tree so
+         * it doesn't get lost
+         */
+        set_page_extent_mapped(eb->first_page);
+        set_page_extent_head(eb->first_page, eb->len);
+        if (!page0)
+                unlock_page(eb->first_page);
         return eb;
 
 free_eb:
+        if (eb->first_page && !page0)
+                unlock_page(eb->first_page);
+
         if (!atomic_dec_and_test(&eb->refs))
                 return exists;
         btrfs_release_extent_buffer(eb);
@@ -3269,10 +3303,11 @@ int clear_extent_buffer_dirty(struct extent_io_tree *tree,
                         continue;
 
                 lock_page(page);
+                WARN_ON(!PagePrivate(page));
+
+                set_page_extent_mapped(page);
                 if (i == 0)
                         set_page_extent_head(page, eb->len);
-                else
-                        set_page_private(page, EXTENT_PAGE_PRIVATE);
 
                 clear_page_dirty_for_io(page);
                 spin_lock_irq(&page->mapping->tree_lock);
@@ -3462,6 +3497,13 @@ int read_extent_buffer_pages(struct extent_io_tree *tree,
 
         for (i = start_i; i < num_pages; i++) {
                 page = extent_buffer_page(eb, i);
+
+                WARN_ON(!PagePrivate(page));
+
+                set_page_extent_mapped(page);
+                if (i == 0)
+                        set_page_extent_head(page, eb->len);
+
                 if (inc_all_pages)
                         page_cache_get(page);
                 if (!PageUptodate(page)) {
diff --git a/fs/btrfs/extent_map.c b/fs/btrfs/extent_map.c
index b0e1fce12530..2b6c12e983b3 100644
--- a/fs/btrfs/extent_map.c
+++ b/fs/btrfs/extent_map.c
@@ -51,8 +51,8 @@ struct extent_map *alloc_extent_map(gfp_t mask)
 {
         struct extent_map *em;
         em = kmem_cache_alloc(extent_map_cache, mask);
-        if (!em || IS_ERR(em))
-                return em;
+        if (!em)
+                return NULL;
         em->in_tree = 0;
         em->flags = 0;
         em->compress_type = BTRFS_COMPRESS_NONE;
diff --git a/fs/btrfs/file-item.c b/fs/btrfs/file-item.c
index a562a250ae77..4f19a3e1bf32 100644
--- a/fs/btrfs/file-item.c
+++ b/fs/btrfs/file-item.c
@@ -536,6 +536,8 @@ int btrfs_del_csums(struct btrfs_trans_handle *trans,
         root = root->fs_info->csum_root;
 
         path = btrfs_alloc_path();
+        if (!path)
+                return -ENOMEM;
 
         while (1) {
                 key.objectid = BTRFS_EXTENT_CSUM_OBJECTID;
@@ -548,7 +550,10 @@ int btrfs_del_csums(struct btrfs_trans_handle *trans,
                         if (path->slots[0] == 0)
                                 goto out;
                         path->slots[0]--;
+                } else if (ret < 0) {
+                        goto out;
                 }
+
                 leaf = path->nodes[0];
                 btrfs_item_key_to_cpu(leaf, &key, path->slots[0]);
 
diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c
index c800d58f3013..7084140d5940 100644
--- a/fs/btrfs/file.c
+++ b/fs/btrfs/file.c
@@ -186,6 +186,7 @@ int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
                         split = alloc_extent_map(GFP_NOFS);
                 if (!split2)
                         split2 = alloc_extent_map(GFP_NOFS);
+                BUG_ON(!split || !split2);
 
                 write_lock(&em_tree->lock);
                 em = lookup_extent_mapping(em_tree, start, len);
@@ -793,8 +794,12 @@ again:
         for (i = 0; i < num_pages; i++) {
                 pages[i] = grab_cache_page(inode->i_mapping, index + i);
                 if (!pages[i]) {
-                        err = -ENOMEM;
-                        BUG_ON(1);
+                        int c;
+                        for (c = i - 1; c >= 0; c--) {
+                                unlock_page(pages[c]);
+                                page_cache_release(pages[c]);
+                        }
+                        return -ENOMEM;
                 }
                 wait_on_page_writeback(pages[i]);
         }
@@ -946,6 +951,10 @@ static ssize_t btrfs_file_aio_write(struct kiocb *iocb,
                      PAGE_CACHE_SIZE, PAGE_CACHE_SIZE /
                      (sizeof(struct page *)));
         pages = kmalloc(nrptrs * sizeof(struct page *), GFP_KERNEL);
+        if (!pages) {
+                ret = -ENOMEM;
+                goto out;
+        }
 
         /* generic_write_checks can change our pos */
         start_pos = pos;
@@ -984,8 +993,8 @@ static ssize_t btrfs_file_aio_write(struct kiocb *iocb,
                 size_t write_bytes = min(iov_iter_count(&i),
                                          nrptrs * (size_t)PAGE_CACHE_SIZE -
                                          offset);
-                size_t num_pages = (write_bytes + PAGE_CACHE_SIZE - 1) >>
-                                        PAGE_CACHE_SHIFT;
+                size_t num_pages = (write_bytes + offset +
+                                    PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
 
                 WARN_ON(num_pages > nrptrs);
                 memset(pages, 0, sizeof(struct page *) * nrptrs);
@@ -1015,8 +1024,8 @@ static ssize_t btrfs_file_aio_write(struct kiocb *iocb,
 
                 copied = btrfs_copy_from_user(pos, num_pages,
                                            write_bytes, pages, &i);
-                dirty_pages = (copied + PAGE_CACHE_SIZE - 1) >>
-                                        PAGE_CACHE_SHIFT;
+                dirty_pages = (copied + offset + PAGE_CACHE_SIZE - 1) >>
+                                PAGE_CACHE_SHIFT;
 
                 if (num_pages > dirty_pages) {
                         if (copied > 0)
diff --git a/fs/btrfs/free-space-cache.c b/fs/btrfs/free-space-cache.c
index 60d684266959..a0390657451b 100644
--- a/fs/btrfs/free-space-cache.c
+++ b/fs/btrfs/free-space-cache.c
@@ -987,11 +987,18 @@ tree_search_offset(struct btrfs_block_group_cache *block_group,
         return entry;
 }
 
-static void unlink_free_space(struct btrfs_block_group_cache *block_group,
-                              struct btrfs_free_space *info)
+static inline void
+__unlink_free_space(struct btrfs_block_group_cache *block_group,
+                    struct btrfs_free_space *info)
 {
         rb_erase(&info->offset_index, &block_group->free_space_offset);
         block_group->free_extents--;
+}
+
+static void unlink_free_space(struct btrfs_block_group_cache *block_group,
+                              struct btrfs_free_space *info)
+{
+        __unlink_free_space(block_group, info);
         block_group->free_space -= info->bytes;
 }
 
@@ -1016,14 +1023,18 @@ static void recalculate_thresholds(struct btrfs_block_group_cache *block_group)
         u64 max_bytes;
         u64 bitmap_bytes;
         u64 extent_bytes;
+        u64 size = block_group->key.offset;
 
         /*
          * The goal is to keep the total amount of memory used per 1gb of space
          * at or below 32k, so we need to adjust how much memory we allow to be
          * used by extent based free space tracking
          */
-        max_bytes = MAX_CACHE_BYTES_PER_GIG *
-                (div64_u64(block_group->key.offset, 1024 * 1024 * 1024));
+        if (size < 1024 * 1024 * 1024)
+                max_bytes = MAX_CACHE_BYTES_PER_GIG;
+        else
+                max_bytes = MAX_CACHE_BYTES_PER_GIG *
+                        div64_u64(size, 1024 * 1024 * 1024);
 
         /*
          * we want to account for 1 more bitmap than what we have so we can make
@@ -1171,6 +1182,16 @@ static void add_new_bitmap(struct btrfs_block_group_cache *block_group,
         recalculate_thresholds(block_group);
 }
 
+static void free_bitmap(struct btrfs_block_group_cache *block_group,
+                        struct btrfs_free_space *bitmap_info)
+{
+        unlink_free_space(block_group, bitmap_info);
+        kfree(bitmap_info->bitmap);
+        kfree(bitmap_info);
+        block_group->total_bitmaps--;
+        recalculate_thresholds(block_group);
+}
+
 static noinline int remove_from_bitmap(struct btrfs_block_group_cache *block_group,
                               struct btrfs_free_space *bitmap_info,
                               u64 *offset, u64 *bytes)
@@ -1195,6 +1216,7 @@ again:
          */
         search_start = *offset;
         search_bytes = *bytes;
+        search_bytes = min(search_bytes, end - search_start + 1);
         ret = search_bitmap(block_group, bitmap_info, &search_start,
                             &search_bytes);
         BUG_ON(ret < 0 || search_start != *offset);
@@ -1211,13 +1233,8 @@ again:
 
         if (*bytes) {
                 struct rb_node *next = rb_next(&bitmap_info->offset_index);
-                if (!bitmap_info->bytes) {
-                        unlink_free_space(block_group, bitmap_info);
-                        kfree(bitmap_info->bitmap);
-                        kfree(bitmap_info);
-                        block_group->total_bitmaps--;
-                        recalculate_thresholds(block_group);
-                }
+                if (!bitmap_info->bytes)
+                        free_bitmap(block_group, bitmap_info);
 
                 /*
                  * no entry after this bitmap, but we still have bytes to
@@ -1250,13 +1267,8 @@ again:
                         return -EAGAIN;
 
                 goto again;
-        } else if (!bitmap_info->bytes) {
-                unlink_free_space(block_group, bitmap_info);
-                kfree(bitmap_info->bitmap);
-                kfree(bitmap_info);
-                block_group->total_bitmaps--;
-                recalculate_thresholds(block_group);
-        }
+        } else if (!bitmap_info->bytes)
+                free_bitmap(block_group, bitmap_info);
 
         return 0;
 }
@@ -1359,22 +1371,14 @@ out:
         return ret;
 }
 
-int btrfs_add_free_space(struct btrfs_block_group_cache *block_group,
-                         u64 offset, u64 bytes)
+bool try_merge_free_space(struct btrfs_block_group_cache *block_group,
+                          struct btrfs_free_space *info, bool update_stat)
 {
-        struct btrfs_free_space *right_info = NULL;
-        struct btrfs_free_space *left_info = NULL;
-        struct btrfs_free_space *info = NULL;
-        int ret = 0;
-
-        info = kzalloc(sizeof(struct btrfs_free_space), GFP_NOFS);
-        if (!info)
-                return -ENOMEM;
-
-        info->offset = offset;
-        info->bytes = bytes;
-
-        spin_lock(&block_group->tree_lock);
+        struct btrfs_free_space *left_info;
+        struct btrfs_free_space *right_info;
+        bool merged = false;
+        u64 offset = info->offset;
+        u64 bytes = info->bytes;
 
         /*
          * first we want to see if there is free space adjacent to the range we
@@ -1388,37 +1392,62 @@ int btrfs_add_free_space(struct btrfs_block_group_cache *block_group,
         else
                 left_info = tree_search_offset(block_group, offset - 1, 0, 0);
 
-        /*
-         * If there was no extent directly to the left or right of this new
-         * extent then we know we're going to have to allocate a new extent, so
-         * before we do that see if we need to drop this into a bitmap
-         */
-        if ((!left_info || left_info->bitmap) &&
-            (!right_info || right_info->bitmap)) {
-                ret = insert_into_bitmap(block_group, info);
-
-                if (ret < 0) {
-                        goto out;
-                } else if (ret) {
-                        ret = 0;
-                        goto out;
-                }
-        }
-
         if (right_info && !right_info->bitmap) {
-                unlink_free_space(block_group, right_info);
+                if (update_stat)
+                        unlink_free_space(block_group, right_info);
+                else
+                        __unlink_free_space(block_group, right_info);
                 info->bytes += right_info->bytes;
                 kfree(right_info);
+                merged = true;
         }
 
         if (left_info && !left_info->bitmap &&
             left_info->offset + left_info->bytes == offset) {
-                unlink_free_space(block_group, left_info);
+                if (update_stat)
+                        unlink_free_space(block_group, left_info);
+                else
+                        __unlink_free_space(block_group, left_info);
                 info->offset = left_info->offset;
                 info->bytes += left_info->bytes;
                 kfree(left_info);
+                merged = true;
         }
 
+        return merged;
+}
+
+int btrfs_add_free_space(struct btrfs_block_group_cache *block_group,
+                         u64 offset, u64 bytes)
+{
+        struct btrfs_free_space *info;
+        int ret = 0;
+
+        info = kzalloc(sizeof(struct btrfs_free_space), GFP_NOFS);
+        if (!info)
+                return -ENOMEM;
+
+        info->offset = offset;
+        info->bytes = bytes;
+
+        spin_lock(&block_group->tree_lock);
+
+        if (try_merge_free_space(block_group, info, true))
+                goto link;
+
+        /*
+         * There was no extent directly to the left or right of this new
+         * extent then we know we're going to have to allocate a new extent, so
+         * before we do that see if we need to drop this into a bitmap
+         */
+        ret = insert_into_bitmap(block_group, info);
+        if (ret < 0) {
+                goto out;
+        } else if (ret) {
+                ret = 0;
+                goto out;
+        }
+link:
         ret = link_free_space(block_group, info);
         if (ret)
                 kfree(info);
@@ -1621,6 +1650,7 @@ __btrfs_return_cluster_to_free_space(
                 node = rb_next(&entry->offset_index);
                 rb_erase(&entry->offset_index, &cluster->root);
                 BUG_ON(entry->bitmap);
+                try_merge_free_space(block_group, entry, false);
                 tree_insert_offset(&block_group->free_space_offset,
                                    entry->offset, &entry->offset_index, 0);
         }
@@ -1685,13 +1715,8 @@ u64 btrfs_find_space_for_alloc(struct btrfs_block_group_cache *block_group,
         ret = offset;
         if (entry->bitmap) {
                 bitmap_clear_bits(block_group, entry, offset, bytes);
-                if (!entry->bytes) {
-                        unlink_free_space(block_group, entry);
-                        kfree(entry->bitmap);
-                        kfree(entry);
-                        block_group->total_bitmaps--;
-                        recalculate_thresholds(block_group);
-                }
+                if (!entry->bytes)
+                        free_bitmap(block_group, entry);
         } else {
                 unlink_free_space(block_group, entry);
                 entry->offset += bytes;
@@ -1789,6 +1814,8 @@ static u64 btrfs_alloc_from_bitmap(struct btrfs_block_group_cache *block_group,
 
         ret = search_start;
         bitmap_clear_bits(block_group, entry, ret, bytes);
+        if (entry->bytes == 0)
+                free_bitmap(block_group, entry);
 out:
         spin_unlock(&cluster->lock);
         spin_unlock(&block_group->tree_lock);
@@ -1842,15 +1869,26 @@ u64 btrfs_alloc_from_cluster(struct btrfs_block_group_cache *block_group,
                 entry->offset += bytes;
                 entry->bytes -= bytes;
 
-                if (entry->bytes == 0) {
+                if (entry->bytes == 0)
                         rb_erase(&entry->offset_index, &cluster->root);
-                        kfree(entry);
-                }
                 break;
         }
 out:
         spin_unlock(&cluster->lock);
 
+        if (!ret)
+                return 0;
+
+        spin_lock(&block_group->tree_lock);
+
+        block_group->free_space -= bytes;
+        if (entry->bytes == 0) {
+                block_group->free_extents--;
+                kfree(entry);
+        }
+
+        spin_unlock(&block_group->tree_lock);
+
         return ret;
 }
 
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 160b55b3e132..fb9bd7832b6d 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -416,7 +416,7 @@ again:
         }
         if (start == 0) {
                 trans = btrfs_join_transaction(root, 1);
-                BUG_ON(!trans);
+                BUG_ON(IS_ERR(trans));
                 btrfs_set_trans_block_group(trans, inode);
                 trans->block_rsv = &root->fs_info->delalloc_block_rsv;
 
@@ -612,6 +612,7 @@ retry:
                             GFP_NOFS);
 
                 trans = btrfs_join_transaction(root, 1);
+                BUG_ON(IS_ERR(trans));
                 ret = btrfs_reserve_extent(trans, root,
                                            async_extent->compressed_size,
                                            async_extent->compressed_size,
@@ -643,6 +644,7 @@ retry:
                                         async_extent->ram_size - 1, 0);
 
                 em = alloc_extent_map(GFP_NOFS);
+                BUG_ON(!em);
                 em->start = async_extent->start;
                 em->len = async_extent->ram_size;
                 em->orig_start = em->start;
@@ -771,7 +773,7 @@ static noinline int cow_file_range(struct inode *inode,
 
         BUG_ON(root == root->fs_info->tree_root);
         trans = btrfs_join_transaction(root, 1);
-        BUG_ON(!trans);
+        BUG_ON(IS_ERR(trans));
         btrfs_set_trans_block_group(trans, inode);
         trans->block_rsv = &root->fs_info->delalloc_block_rsv;
 
@@ -819,6 +821,7 @@ static noinline int cow_file_range(struct inode *inode,
                 BUG_ON(ret);
 
                 em = alloc_extent_map(GFP_NOFS);
+                BUG_ON(!em);
                 em->start = start;
                 em->orig_start = em->start;
                 ram_size = ins.offset;
@@ -1049,7 +1052,7 @@ static noinline int run_delalloc_nocow(struct inode *inode,
         } else {
                 trans = btrfs_join_transaction(root, 1);
         }
-        BUG_ON(!trans);
+        BUG_ON(IS_ERR(trans));
 
         cow_start = (u64)-1;
         cur_offset = start;
@@ -1168,6 +1171,7 @@ out_check:
                         struct extent_map_tree *em_tree;
                         em_tree = &BTRFS_I(inode)->extent_tree;
                         em = alloc_extent_map(GFP_NOFS);
+                        BUG_ON(!em);
                         em->start = cur_offset;
                         em->orig_start = em->start;
                         em->len = num_bytes;
@@ -1557,6 +1561,7 @@ out:
 out_page:
         unlock_page(page);
         page_cache_release(page);
+        kfree(fixup);
 }
 
 /*
@@ -1703,7 +1708,7 @@ static int btrfs_finish_ordered_io(struct inode *inode, u64 start, u64 end)
                                 trans = btrfs_join_transaction_nolock(root, 1);
                         else
                                 trans = btrfs_join_transaction(root, 1);
-                        BUG_ON(!trans);
+                        BUG_ON(IS_ERR(trans));
                         btrfs_set_trans_block_group(trans, inode);
                         trans->block_rsv = &root->fs_info->delalloc_block_rsv;
                         ret = btrfs_update_inode(trans, root, inode);
@@ -1720,6 +1725,7 @@ static int btrfs_finish_ordered_io(struct inode *inode, u64 start, u64 end)
                 trans = btrfs_join_transaction_nolock(root, 1);
         else
                 trans = btrfs_join_transaction(root, 1);
+        BUG_ON(IS_ERR(trans));
         btrfs_set_trans_block_group(trans, inode);
         trans->block_rsv = &root->fs_info->delalloc_block_rsv;
 
@@ -2354,6 +2360,7 @@ void btrfs_orphan_cleanup(struct btrfs_root *root)
                  */
                 if (is_bad_inode(inode)) {
                         trans = btrfs_start_transaction(root, 0);
+                        BUG_ON(IS_ERR(trans));
                         btrfs_orphan_del(trans, inode);
                         btrfs_end_transaction(trans, root);
                         iput(inode);
@@ -2381,6 +2388,7 @@ void btrfs_orphan_cleanup(struct btrfs_root *root)
 
         if (root->orphan_block_rsv || root->orphan_item_inserted) {
                 trans = btrfs_join_transaction(root, 1);
+                BUG_ON(IS_ERR(trans));
                 btrfs_end_transaction(trans, root);
         }
 
@@ -2641,7 +2649,7 @@ int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
         path = btrfs_alloc_path();
         if (!path) {
                 ret = -ENOMEM;
-                goto err;
+                goto out;
         }
 
         path->leave_spinning = 1;
@@ -2714,9 +2722,10 @@ static int check_path_shared(struct btrfs_root *root,
         struct extent_buffer *eb;
         int level;
         u64 refs = 1;
-        int uninitialized_var(ret);
 
         for (level = 0; level < BTRFS_MAX_LEVEL; level++) {
+                int ret;
+
                 if (!path->nodes[level])
                         break;
                 eb = path->nodes[level];
@@ -2727,7 +2736,7 @@ static int check_path_shared(struct btrfs_root *root,
                 if (refs > 1)
                         return 1;
         }
-        return ret; /* XXX callers? */
+        return 0;
 }
 
 /*
@@ -4134,7 +4143,7 @@ struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry)
         }
         srcu_read_unlock(&root->fs_info->subvol_srcu, index);
 
-        if (root != sub_root) {
+        if (!IS_ERR(inode) && root != sub_root) {
                 down_read(&root->fs_info->cleanup_work_sem);
                 if (!(inode->i_sb->s_flags & MS_RDONLY))
                         btrfs_orphan_cleanup(sub_root);
@@ -4347,6 +4356,8 @@ int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc)
                         trans = btrfs_join_transaction_nolock(root, 1);
                 else
                         trans = btrfs_join_transaction(root, 1);
+                if (IS_ERR(trans))
+                        return PTR_ERR(trans);
                 btrfs_set_trans_block_group(trans, inode);
                 if (nolock)
                         ret = btrfs_end_transaction_nolock(trans, root);
@@ -4372,6 +4383,7 @@ void btrfs_dirty_inode(struct inode *inode)
                 return;
 
         trans = btrfs_join_transaction(root, 1);
+        BUG_ON(IS_ERR(trans));
         btrfs_set_trans_block_group(trans, inode);
 
         ret = btrfs_update_inode(trans, root, inode);
@@ -5176,6 +5188,8 @@ again:
                                 em = NULL;
                                 btrfs_release_path(root, path);
                                 trans = btrfs_join_transaction(root, 1);
+                                if (IS_ERR(trans))
+                                        return ERR_CAST(trans);
                                 goto again;
                         }
                         map = kmap(page);
@@ -5280,8 +5294,8 @@ static struct extent_map *btrfs_new_extent_direct(struct inode *inode,
         btrfs_drop_extent_cache(inode, start, start + len - 1, 0);
 
         trans = btrfs_join_transaction(root, 0);
-        if (!trans)
-                return ERR_PTR(-ENOMEM);
+        if (IS_ERR(trans))
+                return ERR_CAST(trans);
 
         trans->block_rsv = &root->fs_info->delalloc_block_rsv;
 
@@ -5505,7 +5519,7 @@ static int btrfs_get_blocks_direct(struct inode *inode, sector_t iblock,
                  * while we look for nocow cross refs
                  */
                 trans = btrfs_join_transaction(root, 0);
-                if (!trans)
+                if (IS_ERR(trans))
                         goto must_cow;
 
                 if (can_nocow_odirect(trans, inode, start, len) == 1) {
@@ -5640,7 +5654,7 @@ again:
         BUG_ON(!ordered);
 
         trans = btrfs_join_transaction(root, 1);
-        if (!trans) {
+        if (IS_ERR(trans)) {
                 err = -ENOMEM;
                 goto out;
         }
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index a506a22b522a..be2d4f6aaa5e 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -203,7 +203,7 @@ static int btrfs_ioctl_setflags(struct file *file, void __user *arg)
 
 
         trans = btrfs_join_transaction(root, 1);
-        BUG_ON(!trans);
+        BUG_ON(IS_ERR(trans));
 
         ret = btrfs_update_inode(trans, root, inode);
         BUG_ON(ret);
@@ -907,6 +907,10 @@ static noinline int btrfs_ioctl_resize(struct btrfs_root *root,
 
         if (new_size > old_size) {
                 trans = btrfs_start_transaction(root, 0);
+                if (IS_ERR(trans)) {
+                        ret = PTR_ERR(trans);
+                        goto out_unlock;
+                }
                 ret = btrfs_grow_device(trans, device, new_size);
                 btrfs_commit_transaction(trans, root);
         } else {
@@ -1898,7 +1902,10 @@ static noinline long btrfs_ioctl_clone(struct file *file, unsigned long srcfd,
 
                         memcpy(&new_key, &key, sizeof(new_key));
                         new_key.objectid = inode->i_ino;
-                        new_key.offset = key.offset + destoff - off;
+                        if (off <= key.offset)
+                                new_key.offset = key.offset + destoff - off;
+                        else
+                                new_key.offset = destoff;
 
                         trans = btrfs_start_transaction(root, 1);
                         if (IS_ERR(trans)) {
@@ -2082,7 +2089,7 @@ static long btrfs_ioctl_trans_start(struct file *file)
 
         ret = -ENOMEM;
         trans = btrfs_start_ioctl_transaction(root, 0);
-        if (!trans)
+        if (IS_ERR(trans))
                 goto out_drop;
 
         file->private_data = trans;
@@ -2138,9 +2145,9 @@ static long btrfs_ioctl_default_subvol(struct file *file, void __user *argp)
         path->leave_spinning = 1;
 
         trans = btrfs_start_transaction(root, 1);
-        if (!trans) {
+        if (IS_ERR(trans)) {
                 btrfs_free_path(path);
-                return -ENOMEM;
+                return PTR_ERR(trans);
         }
 
         dir_id = btrfs_super_root_dir(&root->fs_info->super_copy);
@@ -2201,7 +2208,7 @@ long btrfs_ioctl_space_info(struct btrfs_root *root, void __user *arg)
         int num_types = 4;
         int alloc_size;
         int ret = 0;
-        int slot_count = 0;
+        u64 slot_count = 0;
         int i, c;
 
         if (copy_from_user(&space_args,
@@ -2240,7 +2247,7 @@ long btrfs_ioctl_space_info(struct btrfs_root *root, void __user *arg)
                 goto out;
         }
 
-        slot_count = min_t(int, space_args.space_slots, slot_count);
+        slot_count = min_t(u64, space_args.space_slots, slot_count);
 
         alloc_size = sizeof(*dest) * slot_count;
 
@@ -2260,6 +2267,9 @@ long btrfs_ioctl_space_info(struct btrfs_root *root, void __user *arg)
         for (i = 0; i < num_types; i++) {
                 struct btrfs_space_info *tmp;
 
+                if (!slot_count)
+                        break;
+
                 info = NULL;
                 rcu_read_lock();
                 list_for_each_entry_rcu(tmp, &root->fs_info->space_info,
@@ -2281,7 +2291,10 @@ long btrfs_ioctl_space_info(struct btrfs_root *root, void __user *arg)
                                 memcpy(dest, &space, sizeof(space));
                                 dest++;
                                 space_args.total_spaces++;
+                                slot_count--;
                         }
+                        if (!slot_count)
+                                break;
                 }
                 up_read(&info->groups_sem);
         }
@@ -2334,6 +2347,8 @@ static noinline long btrfs_ioctl_start_sync(struct file *file, void __user *argp
         u64 transid;
 
         trans = btrfs_start_transaction(root, 0);
+        if (IS_ERR(trans))
+                return PTR_ERR(trans);
         transid = trans->transid;
         btrfs_commit_transaction_async(trans, root, 0);
 
diff --git a/fs/btrfs/ordered-data.c b/fs/btrfs/ordered-data.c
index 2b61e1ddcd99..083a55477375 100644
--- a/fs/btrfs/ordered-data.c
+++ b/fs/btrfs/ordered-data.c
@@ -141,7 +141,7 @@ static inline struct rb_node *tree_search(struct btrfs_ordered_inode_tree *tree,
                                           u64 file_offset)
 {
         struct rb_root *root = &tree->tree;
-        struct rb_node *prev;
+        struct rb_node *prev = NULL;
         struct rb_node *ret;
         struct btrfs_ordered_extent *entry;
 
diff --git a/fs/btrfs/print-tree.c b/fs/btrfs/print-tree.c
index 0d126be22b63..fb2605d998e9 100644
--- a/fs/btrfs/print-tree.c
+++ b/fs/btrfs/print-tree.c
@@ -260,6 +260,7 @@ void btrfs_print_leaf(struct btrfs_root *root, struct extent_buffer *l)
 #else
                         BUG();
 #endif
+                        break;
                 case BTRFS_BLOCK_GROUP_ITEM_KEY:
                         bi = btrfs_item_ptr(l, i,
                                             struct btrfs_block_group_item);
diff --git a/fs/btrfs/relocation.c b/fs/btrfs/relocation.c
index 045c9c2b2d7e..0825e4ed9447 100644
--- a/fs/btrfs/relocation.c
+++ b/fs/btrfs/relocation.c
@@ -1157,6 +1157,7 @@ static int clone_backref_node(struct btrfs_trans_handle *trans,
         new_node->bytenr = dest->node->start;
         new_node->level = node->level;
         new_node->lowest = node->lowest;
+        new_node->checked = 1;
         new_node->root = dest;
 
         if (!node->lowest) {
@@ -2028,6 +2029,7 @@ static noinline_for_stack int merge_reloc_root(struct reloc_control *rc,
 
         while (1) {
                 trans = btrfs_start_transaction(root, 0);
+                BUG_ON(IS_ERR(trans));
                 trans->block_rsv = rc->block_rsv;
 
                 ret = btrfs_block_rsv_check(trans, root, rc->block_rsv,
@@ -2147,6 +2149,12 @@ again:
         }
 
         trans = btrfs_join_transaction(rc->extent_root, 1);
+        if (IS_ERR(trans)) {
+                if (!err)
+                        btrfs_block_rsv_release(rc->extent_root,
+                                                rc->block_rsv, num_bytes);
+                return PTR_ERR(trans);
+        }
 
         if (!err) {
                 if (num_bytes != rc->merging_rsv_size) {
@@ -3222,6 +3230,7 @@ truncate:
         trans = btrfs_join_transaction(root, 0);
         if (IS_ERR(trans)) {
                 btrfs_free_path(path);
+                ret = PTR_ERR(trans);
                 goto out;
         }
 
@@ -3628,6 +3637,7 @@ int prepare_to_relocate(struct reloc_control *rc)
         set_reloc_control(rc);
 
         trans = btrfs_join_transaction(rc->extent_root, 1);
+        BUG_ON(IS_ERR(trans));
         btrfs_commit_transaction(trans, rc->extent_root);
         return 0;
 }
@@ -3657,6 +3667,7 @@ static noinline_for_stack int relocate_block_group(struct reloc_control *rc)
 
         while (1) {
                 trans = btrfs_start_transaction(rc->extent_root, 0);
+                BUG_ON(IS_ERR(trans));
 
                 if (update_backref_cache(trans, &rc->backref_cache)) {
                         btrfs_end_transaction(trans, rc->extent_root);
@@ -3804,7 +3815,10 @@ static noinline_for_stack int relocate_block_group(struct reloc_control *rc)
 
         /* get rid of pinned extents */
         trans = btrfs_join_transaction(rc->extent_root, 1);
-        btrfs_commit_transaction(trans, rc->extent_root);
+        if (IS_ERR(trans))
+                err = PTR_ERR(trans);
+        else
+                btrfs_commit_transaction(trans, rc->extent_root);
 out_free:
         btrfs_free_block_rsv(rc->extent_root, rc->block_rsv);
         btrfs_free_path(path);
@@ -4022,6 +4036,7 @@ static noinline_for_stack int mark_garbage_root(struct btrfs_root *root)
         int ret;
 
         trans = btrfs_start_transaction(root->fs_info->tree_root, 0);
+        BUG_ON(IS_ERR(trans));
 
         memset(&root->root_item.drop_progress, 0,
                 sizeof(root->root_item.drop_progress));
@@ -4125,6 +4140,11 @@ int btrfs_recover_relocation(struct btrfs_root *root)
         set_reloc_control(rc);
 
         trans = btrfs_join_transaction(rc->extent_root, 1);
+        if (IS_ERR(trans)) {
+                unset_reloc_control(rc);
+                err = PTR_ERR(trans);
+                goto out_free;
+        }
 
         rc->merge_reloc_tree = 1;
 
@@ -4154,9 +4174,13 @@ int btrfs_recover_relocation(struct btrfs_root *root)
         unset_reloc_control(rc);
 
         trans = btrfs_join_transaction(rc->extent_root, 1);
-        btrfs_commit_transaction(trans, rc->extent_root);
-out:
+        if (IS_ERR(trans))
+                err = PTR_ERR(trans);
+        else
+                btrfs_commit_transaction(trans, rc->extent_root);
+out_free:
         kfree(rc);
+out:
         while (!list_empty(&reloc_roots)) {
                 reloc_root = list_entry(reloc_roots.next,
                                         struct btrfs_root, root_list);
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index b2130c46fdb5..a004008f7d28 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -383,7 +383,7 @@ static int btrfs_parse_early_options(const char *options, fmode_t flags,
                 struct btrfs_fs_devices **fs_devices)
 {
         substring_t args[MAX_OPT_ARGS];
-        char *opts, *p;
+        char *opts, *orig, *p;
         int error = 0;
         int intarg;
 
@@ -397,6 +397,7 @@ static int btrfs_parse_early_options(const char *options, fmode_t flags,
         opts = kstrdup(options, GFP_KERNEL);
         if (!opts)
                 return -ENOMEM;
+        orig = opts;
 
         while ((p = strsep(&opts, ",")) != NULL) {
                 int token;
@@ -432,7 +433,7 @@ static int btrfs_parse_early_options(const char *options, fmode_t flags,
         }
 
  out_free_opts:
-        kfree(opts);
+        kfree(orig);
  out:
         /*
          * If no subvolume name is specified we use the default one.  Allocate
@@ -623,6 +624,8 @@ int btrfs_sync_fs(struct super_block *sb, int wait)
         btrfs_wait_ordered_extents(root, 0, 0);
 
         trans = btrfs_start_transaction(root, 0);
+        if (IS_ERR(trans))
+                return PTR_ERR(trans);
         ret = btrfs_commit_transaction(trans, root);
         return ret;
 }
@@ -761,6 +764,8 @@ static struct dentry *btrfs_mount(struct file_system_type *fs_type, int flags,
                 }
 
                 btrfs_close_devices(fs_devices);
+                kfree(fs_info);
+                kfree(tree_root);
         } else {
                 char b[BDEVNAME_SIZE];
 
diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c
index bae5c7b8bbe2..3d73c8d93bbb 100644
--- a/fs/btrfs/transaction.c
+++ b/fs/btrfs/transaction.c
@@ -1161,6 +1161,11 @@ int btrfs_commit_transaction_async(struct btrfs_trans_handle *trans,
         INIT_DELAYED_WORK(&ac->work, do_async_commit);
         ac->root = root;
         ac->newtrans = btrfs_join_transaction(root, 0);
+        if (IS_ERR(ac->newtrans)) {
+                int err = PTR_ERR(ac->newtrans);
+                kfree(ac);
+                return err;
+        }
 
         /* take transaction reference */
         mutex_lock(&root->fs_info->trans_mutex);
diff --git a/fs/btrfs/tree-log.c b/fs/btrfs/tree-log.c
index 054744ac5719..a4bbb854dfd2 100644
--- a/fs/btrfs/tree-log.c
+++ b/fs/btrfs/tree-log.c
@@ -338,6 +338,12 @@ static noinline int overwrite_item(struct btrfs_trans_handle *trans,
                 }
                 dst_copy = kmalloc(item_size, GFP_NOFS);
                 src_copy = kmalloc(item_size, GFP_NOFS);
+                if (!dst_copy || !src_copy) {
+                        btrfs_release_path(root, path);
+                        kfree(dst_copy);
+                        kfree(src_copy);
+                        return -ENOMEM;
+                }
 
                 read_extent_buffer(eb, src_copy, src_ptr, item_size);
 
@@ -665,6 +671,9 @@ static noinline int drop_one_dir_item(struct btrfs_trans_handle *trans,
         btrfs_dir_item_key_to_cpu(leaf, di, &location);
         name_len = btrfs_dir_name_len(leaf, di);
         name = kmalloc(name_len, GFP_NOFS);
+        if (!name)
+                return -ENOMEM;
+
         read_extent_buffer(leaf, name, (unsigned long)(di + 1), name_len);
         btrfs_release_path(root, path);
 
@@ -744,6 +753,9 @@ static noinline int backref_in_log(struct btrfs_root *log,
         int match = 0;
 
         path = btrfs_alloc_path();
+        if (!path)
+                return -ENOMEM;
+
         ret = btrfs_search_slot(NULL, log, key, path, 0, 0);
         if (ret != 0)
                 goto out;
@@ -967,6 +979,8 @@ static noinline int fixup_inode_link_count(struct btrfs_trans_handle *trans,
         key.offset = (u64)-1;
 
         path = btrfs_alloc_path();
+        if (!path)
+                return -ENOMEM;
 
         while (1) {
                 ret = btrfs_search_slot(NULL, root, &key, path, 0, 0);
@@ -1178,6 +1192,9 @@ static noinline int replay_one_name(struct btrfs_trans_handle *trans,
 
         name_len = btrfs_dir_name_len(eb, di);
         name = kmalloc(name_len, GFP_NOFS);
+        if (!name)
+                return -ENOMEM;
+
         log_type = btrfs_dir_type(eb, di);
         read_extent_buffer(eb, name, (unsigned long)(di + 1),
                    name_len);
@@ -1692,6 +1709,8 @@ static noinline int walk_down_log_tree(struct btrfs_trans_handle *trans,
                 root_owner = btrfs_header_owner(parent);
 
                 next = btrfs_find_create_tree_block(root, bytenr, blocksize);
+                if (!next)
+                        return -ENOMEM;
 
                 if (*level == 1) {
                         wc->process_func(root, next, wc, ptr_gen);
@@ -2032,6 +2051,7 @@ int btrfs_sync_log(struct btrfs_trans_handle *trans,
                 wait_log_commit(trans, log_root_tree,
                                 log_root_tree->log_transid);
                 mutex_unlock(&log_root_tree->log_mutex);
+                ret = 0;
                 goto out;
         }
         atomic_set(&log_root_tree->log_commit[index2], 1);
@@ -2096,7 +2116,7 @@ out:
         smp_mb();
         if (waitqueue_active(&root->log_commit_wait[index1]))
                 wake_up(&root->log_commit_wait[index1]);
-        return 0;
+        return ret;
 }
 
 static void free_log_tree(struct btrfs_trans_handle *trans,
@@ -2194,6 +2214,9 @@ int btrfs_del_dir_entries_in_log(struct btrfs_trans_handle *trans,
 
         log = root->log_root;
         path = btrfs_alloc_path();
+        if (!path)
+                return -ENOMEM;
+
         di = btrfs_lookup_dir_item(trans, log, path, dir->i_ino,
                                    name, name_len, -1);
         if (IS_ERR(di)) {
@@ -2594,6 +2617,9 @@ static noinline int copy_items(struct btrfs_trans_handle *trans,
 
         ins_data = kmalloc(nr * sizeof(struct btrfs_key) +
                            nr * sizeof(u32), GFP_NOFS);
+        if (!ins_data)
+                return -ENOMEM;
+
         ins_sizes = (u32 *)ins_data;
         ins_keys = (struct btrfs_key *)(ins_data + nr * sizeof(u32));
 
@@ -2725,7 +2751,13 @@ static int btrfs_log_inode(struct btrfs_trans_handle *trans,
         log = root->log_root;
 
         path = btrfs_alloc_path();
+        if (!path)
+                return -ENOMEM;
         dst_path = btrfs_alloc_path();
+        if (!dst_path) {
+                btrfs_free_path(path);
+                return -ENOMEM;
+        }
 
         min_key.objectid = inode->i_ino;
         min_key.type = BTRFS_INODE_ITEM_KEY;
@@ -3080,6 +3112,7 @@ int btrfs_recover_log_trees(struct btrfs_root *log_root_tree)
         BUG_ON(!path);
 
         trans = btrfs_start_transaction(fs_info->tree_root, 0);
+        BUG_ON(IS_ERR(trans));
 
         wc.trans = trans;
         wc.pin = 1;
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index d158530233b7..af7dbca15276 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -1213,6 +1213,10 @@ static int btrfs_rm_dev_item(struct btrfs_root *root,
                 return -ENOMEM;
 
         trans = btrfs_start_transaction(root, 0);
+        if (IS_ERR(trans)) {
+                btrfs_free_path(path);
+                return PTR_ERR(trans);
+        }
         key.objectid = BTRFS_DEV_ITEMS_OBJECTID;
         key.type = BTRFS_DEV_ITEM_KEY;
         key.offset = device->devid;
@@ -1601,11 +1605,19 @@ int btrfs_init_new_device(struct btrfs_root *root, char *device_path)
 
         ret = find_next_devid(root, &device->devid);
         if (ret) {
+                kfree(device->name);
                 kfree(device);
                 goto error;
         }
 
         trans = btrfs_start_transaction(root, 0);
+        if (IS_ERR(trans)) {
+                kfree(device->name);
+                kfree(device);
+                ret = PTR_ERR(trans);
+                goto error;
+        }
+
         lock_chunks(root);
 
         device->writeable = 1;
@@ -1873,7 +1885,7 @@ static int btrfs_relocate_chunk(struct btrfs_root *root,
                 return ret;
 
         trans = btrfs_start_transaction(root, 0);
-        BUG_ON(!trans);
+        BUG_ON(IS_ERR(trans));
 
         lock_chunks(root);
 
@@ -2047,7 +2059,7 @@ int btrfs_balance(struct btrfs_root *dev_root)
                 BUG_ON(ret);
 
                 trans = btrfs_start_transaction(dev_root, 0);
-                BUG_ON(!trans);
+                BUG_ON(IS_ERR(trans));
 
                 ret = btrfs_grow_device(trans, device, old_size);
                 BUG_ON(ret);
@@ -2213,6 +2225,11 @@ again:
 
         /* Shrinking succeeded, else we would be at "done". */
         trans = btrfs_start_transaction(root, 0);
+        if (IS_ERR(trans)) {
+                ret = PTR_ERR(trans);
+                goto done;
+        }
+
         lock_chunks(root);
 
         device->disk_total_bytes = new_size;
diff --git a/fs/ceph/dir.c b/fs/ceph/dir.c
index 0bc68de8edd7..f0aef787a102 100644
--- a/fs/ceph/dir.c
+++ b/fs/ceph/dir.c
@@ -60,6 +60,7 @@ int ceph_init_dentry(struct dentry *dentry)
         }
         di->dentry = dentry;
         di->lease_session = NULL;
+        di->parent_inode = igrab(dentry->d_parent->d_inode);
         dentry->d_fsdata = di;
         dentry->d_time = jiffies;
         ceph_dentry_lru_add(dentry);
@@ -1033,7 +1034,7 @@ static void ceph_dentry_release(struct dentry *dentry)
         u64 snapid = CEPH_NOSNAP;
 
         if (!IS_ROOT(dentry)) {
-                parent_inode = dentry->d_parent->d_inode;
+                parent_inode = di->parent_inode;
                 if (parent_inode)
                         snapid = ceph_snap(parent_inode);
         }
@@ -1058,6 +1059,8 @@ static void ceph_dentry_release(struct dentry *dentry)
                 kmem_cache_free(ceph_dentry_cachep, di);
                 dentry->d_fsdata = NULL;
         }
+        if (parent_inode)
+                iput(parent_inode);
 }
 
 static int ceph_snapdir_d_revalidate(struct dentry *dentry,
diff --git a/fs/ceph/snap.c b/fs/ceph/snap.c
index 39c243acd062..f40b9139e437 100644
--- a/fs/ceph/snap.c
+++ b/fs/ceph/snap.c
@@ -584,10 +584,14 @@ static void queue_realm_cap_snaps(struct ceph_snap_realm *realm)
         if (lastinode)
                 iput(lastinode);
 
-        dout("queue_realm_cap_snaps %p %llx children\n", realm, realm->ino);
-        list_for_each_entry(child, &realm->children, child_item)
-                queue_realm_cap_snaps(child);
+        list_for_each_entry(child, &realm->children, child_item) {
+                dout("queue_realm_cap_snaps %p %llx queue child %p %llx\n",
+                     realm, realm->ino, child, child->ino);
+                list_del_init(&child->dirty_item);
+                list_add(&child->dirty_item, &realm->dirty_item);
+        }
 
+        list_del_init(&realm->dirty_item);
         dout("queue_realm_cap_snaps %p %llx done\n", realm, realm->ino);
 }
 
@@ -683,7 +687,9 @@ more:
          * queue cap snaps _after_ we've built the new snap contexts,
          * so that i_head_snapc can be set appropriately.
          */
-        list_for_each_entry(realm, &dirty_realms, dirty_item) {
+        while (!list_empty(&dirty_realms)) {
+                realm = list_first_entry(&dirty_realms, struct ceph_snap_realm,
+                                         dirty_item);
                 queue_realm_cap_snaps(realm);
         }
 
diff --git a/fs/ceph/super.h b/fs/ceph/super.h
index 20b907d76ae2..88fcaa21b801 100644
--- a/fs/ceph/super.h
+++ b/fs/ceph/super.h
@@ -207,6 +207,7 @@ struct ceph_dentry_info {
         struct dentry *dentry;
         u64 time;
         u64 offset;
+        struct inode *parent_inode;
 };
 
 struct ceph_inode_xattrs_info {
diff --git a/fs/cifs/Kconfig b/fs/cifs/Kconfig
index ee45648b0d1a..7cb0f7f847e4 100644
--- a/fs/cifs/Kconfig
+++ b/fs/cifs/Kconfig
@@ -3,6 +3,7 @@ config CIFS
         depends on INET
         select NLS
         select CRYPTO
+        select CRYPTO_MD4
         select CRYPTO_MD5
         select CRYPTO_HMAC
         select CRYPTO_ARC4
diff --git a/fs/cifs/cifs_dfs_ref.c b/fs/cifs/cifs_dfs_ref.c
index f1c68629f277..0a265ad9e426 100644
--- a/fs/cifs/cifs_dfs_ref.c
+++ b/fs/cifs/cifs_dfs_ref.c
@@ -282,8 +282,6 @@ static struct vfsmount *cifs_dfs_do_automount(struct dentry *mntpt)
         cFYI(1, "in %s", __func__);
         BUG_ON(IS_ROOT(mntpt));
 
-        xid = GetXid();
-
         /*
          * The MSDFS spec states that paths in DFS referral requests and
          * responses must be prefixed by a single '\' character instead of
@@ -293,7 +291,7 @@ static struct vfsmount *cifs_dfs_do_automount(struct dentry *mntpt)
         mnt = ERR_PTR(-ENOMEM);
         full_path = build_path_from_dentry(mntpt);
         if (full_path == NULL)
-                goto free_xid;
+                goto cdda_exit;
 
         cifs_sb = CIFS_SB(mntpt->d_inode->i_sb);
         tlink = cifs_sb_tlink(cifs_sb);
@@ -303,9 +301,11 @@ static struct vfsmount *cifs_dfs_do_automount(struct dentry *mntpt)
         }
         ses = tlink_tcon(tlink)->ses;
 
+        xid = GetXid();
         rc = get_dfs_path(xid, ses, full_path + 1, cifs_sb->local_nls,
                 &num_referrals, &referrals,
                 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
+        FreeXid(xid);
 
         cifs_put_tlink(tlink);
 
@@ -338,8 +338,7 @@ success:
         free_dfs_info_array(referrals, num_referrals);
 free_full_path:
         kfree(full_path);
-free_xid:
-        FreeXid(xid);
+cdda_exit:
         cFYI(1, "leaving %s" , __func__);
         return mnt;
 }
diff --git a/fs/cifs/cifsacl.c b/fs/cifs/cifsacl.c
index 1e7636b145a8..beeebf194234 100644
--- a/fs/cifs/cifsacl.c
+++ b/fs/cifs/cifsacl.c
@@ -372,6 +372,10 @@ static void parse_dacl(struct cifs_acl *pdacl, char *end_of_acl,
 
                 ppace = kmalloc(num_aces * sizeof(struct cifs_ace *),
                                 GFP_KERNEL);
+                if (!ppace) {
+                        cERROR(1, "DACL memory allocation error");
+                        return;
+                }
 
                 for (i = 0; i < num_aces; ++i) {
                         ppace[i] = (struct cifs_ace *) (acl_base + acl_size);
diff --git a/fs/cifs/cifsencrypt.c b/fs/cifs/cifsencrypt.c
index 0db5f1de0227..a51585f9852b 100644
--- a/fs/cifs/cifsencrypt.c
+++ b/fs/cifs/cifsencrypt.c
@@ -657,9 +657,10 @@ calc_seckey(struct cifsSesInfo *ses)
         get_random_bytes(sec_key, CIFS_SESS_KEY_SIZE);
 
         tfm_arc4 = crypto_alloc_blkcipher("ecb(arc4)", 0, CRYPTO_ALG_ASYNC);
-        if (!tfm_arc4 || IS_ERR(tfm_arc4)) {
+        if (IS_ERR(tfm_arc4)) {
+                rc = PTR_ERR(tfm_arc4);
                 cERROR(1, "could not allocate crypto API arc4\n");
-                return PTR_ERR(tfm_arc4);
+                return rc;
         }
 
         desc.tfm = tfm_arc4;
diff --git a/fs/cifs/cifsfs.h b/fs/cifs/cifsfs.h
index 14789a97304e..a9371b6578c0 100644
--- a/fs/cifs/cifsfs.h
+++ b/fs/cifs/cifsfs.h
@@ -127,5 +127,5 @@ extern long cifs_ioctl(struct file *filep, unsigned int cmd, unsigned long arg);
 extern const struct export_operations cifs_export_ops;
 #endif /* EXPERIMENTAL */
 
-#define CIFS_VERSION   "1.69"
+#define CIFS_VERSION   "1.71"
 #endif                          /* _CIFSFS_H */
diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h
index edd5b29b53c9..17afb0fbcaed 100644
--- a/fs/cifs/cifsglob.h
+++ b/fs/cifs/cifsglob.h
@@ -188,6 +188,8 @@ struct TCP_Server_Info {
         /* multiplexed reads or writes */
         unsigned int maxBuf;    /* maxBuf specifies the maximum */
         /* message size the server can send or receive for non-raw SMBs */
+        /* maxBuf is returned by SMB NegotiateProtocol so maxBuf is only 0 */
+        /* when socket is setup (and during reconnect) before NegProt sent */
         unsigned int max_rw;    /* maxRw specifies the maximum */
         /* message size the server can send or receive for */
         /* SMB_COM_WRITE_RAW or SMB_COM_READ_RAW. */
@@ -652,7 +654,7 @@ static inline void free_dfs_info_array(struct dfs_info3_param *param,
 #define   MID_REQUEST_SUBMITTED 2
 #define   MID_RESPONSE_RECEIVED 4
 #define   MID_RETRY_NEEDED      8 /* session closed while this request out */
-#define   MID_NO_RESP_NEEDED 0x10
+#define   MID_RESPONSE_MALFORMED 0x10
 
 /* Types of response buffer returned from SendReceive2 */
 #define   CIFS_NO_BUFFER        0    /* Response buffer not returned */
diff --git a/fs/cifs/cifssmb.c b/fs/cifs/cifssmb.c
index 3106f5e5c633..904aa47e3515 100644
--- a/fs/cifs/cifssmb.c
+++ b/fs/cifs/cifssmb.c
@@ -136,9 +136,6 @@ cifs_reconnect_tcon(struct cifsTconInfo *tcon, int smb_command)
                 }
         }
 
-        if (ses->status == CifsExiting)
-                return -EIO;
-
         /*
          * Give demultiplex thread up to 10 seconds to reconnect, should be
          * greater than cifs socket timeout which is 7 seconds
@@ -156,7 +153,7 @@ cifs_reconnect_tcon(struct cifsTconInfo *tcon, int smb_command)
                  * retrying until process is killed or server comes
                  * back on-line
                  */
-                if (!tcon->retry || ses->status == CifsExiting) {
+                if (!tcon->retry) {
                         cFYI(1, "gave up waiting on reconnect in smb_init");
                         return -EHOSTDOWN;
                 }
@@ -4914,7 +4911,6 @@ CIFSSMBSetFileSize(const int xid, struct cifsTconInfo *tcon, __u64 size,
                    __u16 fid, __u32 pid_of_opener, bool SetAllocation)
 {
         struct smb_com_transaction2_sfi_req *pSMB  = NULL;
-        char *data_offset;
         struct file_end_of_file_info *parm_data;
         int rc = 0;
         __u16 params, param_offset, offset, byte_count, count;
@@ -4938,8 +4934,6 @@ CIFSSMBSetFileSize(const int xid, struct cifsTconInfo *tcon, __u64 size,
         param_offset = offsetof(struct smb_com_transaction2_sfi_req, Fid) - 4;
         offset = param_offset + params;
 
-        data_offset = (char *) (&pSMB->hdr.Protocol) + offset;
-
         count = sizeof(struct file_end_of_file_info);
         pSMB->MaxParameterCount = cpu_to_le16(2);
         /* BB find exact max SMB PDU from sess structure BB */
diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index 47d8ff623683..8d6c17ab593d 100644
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -337,8 +337,13 @@ cifs_echo_request(struct work_struct *work)
         struct TCP_Server_Info *server = container_of(work,
                                         struct TCP_Server_Info, echo.work);
 
-        /* no need to ping if we got a response recently */
-        if (time_before(jiffies, server->lstrp + SMB_ECHO_INTERVAL - HZ))
+        /*
+         * We cannot send an echo until the NEGOTIATE_PROTOCOL request is
+         * done, which is indicated by maxBuf != 0. Also, no need to ping if
+         * we got a response recently
+         */
+        if (server->maxBuf == 0 ||
+            time_before(jiffies, server->lstrp + SMB_ECHO_INTERVAL - HZ))
                 goto requeue_echo;
 
         rc = CIFSSMBEcho(server);
@@ -578,14 +583,23 @@ incomplete_rcv:
                 else if (reconnect == 1)
                         continue;
 
-                length += 4; /* account for rfc1002 hdr */
+                total_read += 4; /* account for rfc1002 hdr */
 
+                dump_smb(smb_buffer, total_read);
 
-                dump_smb(smb_buffer, length);
-                if (checkSMB(smb_buffer, smb_buffer->Mid, total_read+4)) {
-                        cifs_dump_mem("Bad SMB: ", smb_buffer, 48);
-                        continue;
-                }
+                /*
+                 * We know that we received enough to get to the MID as we
+                 * checked the pdu_length earlier. Now check to see
+                 * if the rest of the header is OK. We borrow the length
+                 * var for the rest of the loop to avoid a new stack var.
+                 *
+                 * 48 bytes is enough to display the header and a little bit
+                 * into the payload for debugging purposes.
+                 */
+                length = checkSMB(smb_buffer, smb_buffer->Mid, total_read);
+                if (length != 0)
+                        cifs_dump_mem("Bad SMB: ", smb_buffer,
+                                        min_t(unsigned int, total_read, 48));
 
                 mid_entry = NULL;
                 server->lstrp = jiffies;
@@ -597,7 +611,8 @@ incomplete_rcv:
                         if ((mid_entry->mid == smb_buffer->Mid) &&
                             (mid_entry->midState == MID_REQUEST_SUBMITTED) &&
                             (mid_entry->command == smb_buffer->Command)) {
-                                if (check2ndT2(smb_buffer,server->maxBuf) > 0) {
+                                if (length == 0 &&
+                                   check2ndT2(smb_buffer, server->maxBuf) > 0) {
                                         /* We have a multipart transact2 resp */
                                         isMultiRsp = true;
                                         if (mid_entry->resp_buf) {
@@ -632,12 +647,17 @@ incomplete_rcv:
                                 mid_entry->resp_buf = smb_buffer;
                                 mid_entry->largeBuf = isLargeBuf;
 multi_t2_fnd:
-                                mid_entry->midState = MID_RESPONSE_RECEIVED;
-                                list_del_init(&mid_entry->qhead);
-                                mid_entry->callback(mid_entry);
+                                if (length == 0)
+                                        mid_entry->midState =
+                                                        MID_RESPONSE_RECEIVED;
+                                else
+                                        mid_entry->midState =
+                                                        MID_RESPONSE_MALFORMED;
 #ifdef CONFIG_CIFS_STATS2
                                 mid_entry->when_received = jiffies;
 #endif
+                                list_del_init(&mid_entry->qhead);
+                                mid_entry->callback(mid_entry);
                                 break;
                         }
                         mid_entry = NULL;
@@ -653,6 +673,9 @@ multi_t2_fnd:
                                 else
                                         smallbuf = NULL;
                         }
+                } else if (length != 0) {
+                        /* response sanity checks failed */
+                        continue;
                 } else if (!is_valid_oplock_break(smb_buffer, server) &&
                            !isMultiRsp) {
                         cERROR(1, "No task to wake, unknown frame received! "
diff --git a/fs/cifs/file.c b/fs/cifs/file.c
index 0de17c1db608..e964b1cd5dd0 100644
--- a/fs/cifs/file.c
+++ b/fs/cifs/file.c
@@ -346,7 +346,6 @@ int cifs_open(struct inode *inode, struct file *file)
         struct cifsTconInfo *tcon;
         struct tcon_link *tlink;
         struct cifsFileInfo *pCifsFile = NULL;
-        struct cifsInodeInfo *pCifsInode;
         char *full_path = NULL;
         bool posix_open_ok = false;
         __u16 netfid;
@@ -361,8 +360,6 @@ int cifs_open(struct inode *inode, struct file *file)
         }
         tcon = tlink_tcon(tlink);
 
-        pCifsInode = CIFS_I(file->f_path.dentry->d_inode);
-
         full_path = build_path_from_dentry(file->f_path.dentry);
         if (full_path == NULL) {
                 rc = -ENOMEM;
@@ -1146,7 +1143,6 @@ static int cifs_partialpagewrite(struct page *page, unsigned from, unsigned to)
         char *write_data;
         int rc = -EFAULT;
         int bytes_written = 0;
-        struct cifs_sb_info *cifs_sb;
         struct inode *inode;
         struct cifsFileInfo *open_file;
 
@@ -1154,7 +1150,6 @@ static int cifs_partialpagewrite(struct page *page, unsigned from, unsigned to)
                 return -EFAULT;
 
         inode = page->mapping->host;
-        cifs_sb = CIFS_SB(inode->i_sb);
 
         offset += (loff_t)from;
         write_data = kmap(page);
@@ -1667,9 +1662,10 @@ static ssize_t
 cifs_iovec_write(struct file *file, const struct iovec *iov,
                  unsigned long nr_segs, loff_t *poffset)
 {
-        size_t total_written = 0, written = 0;
-        unsigned long num_pages, npages;
-        size_t copied, len, cur_len, i;
+        unsigned int written;
+        unsigned long num_pages, npages, i;
+        size_t copied, len, cur_len;
+        ssize_t total_written = 0;
         struct kvec *to_send;
         struct page **pages;
         struct iov_iter it;
@@ -1825,7 +1821,8 @@ cifs_iovec_read(struct file *file, const struct iovec *iov,
 {
         int rc;
         int xid;
-        unsigned int total_read, bytes_read = 0;
+        ssize_t total_read;
+        unsigned int bytes_read = 0;
         size_t len, cur_len;
         int iov_offset = 0;
         struct cifs_sb_info *cifs_sb;
diff --git a/fs/cifs/link.c b/fs/cifs/link.c
index 02cd60aefbff..e8804d373404 100644
--- a/fs/cifs/link.c
+++ b/fs/cifs/link.c
@@ -55,8 +55,9 @@ symlink_hash(unsigned int link_len, const char *link_str, u8 *md5_hash)
 
         md5 = crypto_alloc_shash("md5", 0, 0);
         if (IS_ERR(md5)) {
+                rc = PTR_ERR(md5);
                 cERROR(1, "%s: Crypto md5 allocation error %d\n", __func__, rc);
-                return PTR_ERR(md5);
+                return rc;
         }
         size = sizeof(struct shash_desc) + crypto_shash_descsize(md5);
         sdescmd5 = kmalloc(size, GFP_KERNEL);
diff --git a/fs/cifs/misc.c b/fs/cifs/misc.c
index a09e077ba925..2a930a752a78 100644
--- a/fs/cifs/misc.c
+++ b/fs/cifs/misc.c
@@ -236,10 +236,7 @@ __u16 GetNextMid(struct TCP_Server_Info *server)
 {
         __u16 mid = 0;
         __u16 last_mid;
-        int   collision;
-
-        if (server == NULL)
-                return mid;
+        bool collision;
 
         spin_lock(&GlobalMid_Lock);
         last_mid = server->CurrentMid; /* we do not want to loop forever */
@@ -252,24 +249,38 @@ __u16 GetNextMid(struct TCP_Server_Info *server)
         (and it would also have to have been a request that
          did not time out) */
         while (server->CurrentMid != last_mid) {
-                struct list_head *tmp;
                 struct mid_q_entry *mid_entry;
+                unsigned int num_mids;
 
-                collision = 0;
+                collision = false;
                 if (server->CurrentMid == 0)
                         server->CurrentMid++;
 
-                list_for_each(tmp, &server->pending_mid_q) {
-                        mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
-
-                        if ((mid_entry->mid == server->CurrentMid) &&
-                            (mid_entry->midState == MID_REQUEST_SUBMITTED)) {
+                num_mids = 0;
+                list_for_each_entry(mid_entry, &server->pending_mid_q, qhead) {
+                        ++num_mids;
+                        if (mid_entry->mid == server->CurrentMid &&
+                            mid_entry->midState == MID_REQUEST_SUBMITTED) {
                                 /* This mid is in use, try a different one */
-                                collision = 1;
+                                collision = true;
                                 break;
                         }
                 }
-                if (collision == 0) {
+
+                /*
+                 * if we have more than 32k mids in the list, then something
+                 * is very wrong. Possibly a local user is trying to DoS the
+                 * box by issuing long-running calls and SIGKILL'ing them. If
+                 * we get to 2^16 mids then we're in big trouble as this
+                 * function could loop forever.
+                 *
+                 * Go ahead and assign out the mid in this situation, but force
+                 * an eventual reconnect to clean out the pending_mid_q.
+                 */
+                if (num_mids > 32768)
+                        server->tcpStatus = CifsNeedReconnect;
+
+                if (!collision) {
                         mid = server->CurrentMid;
                         break;
                 }
@@ -381,29 +392,31 @@ header_assemble(struct smb_hdr *buffer, char smb_command /* command */ ,
 }
 
 static int
-checkSMBhdr(struct smb_hdr *smb, __u16 mid)
+check_smb_hdr(struct smb_hdr *smb, __u16 mid)
 {
-        /* Make sure that this really is an SMB, that it is a response,
-           and that the message ids match */
-        if ((*(__le32 *) smb->Protocol == cpu_to_le32(0x424d53ff)) &&
-                (mid == smb->Mid)) {
-                if (smb->Flags & SMBFLG_RESPONSE)
-                        return 0;
-                else {
-                /* only one valid case where server sends us request */
-                        if (smb->Command == SMB_COM_LOCKING_ANDX)
-                                return 0;
-                        else
-                                cERROR(1, "Received Request not response");
-                }
-        } else { /* bad signature or mid */
-                if (*(__le32 *) smb->Protocol != cpu_to_le32(0x424d53ff))
-                        cERROR(1, "Bad protocol string signature header %x",
-                                *(unsigned int *) smb->Protocol);
-                if (mid != smb->Mid)
-                        cERROR(1, "Mids do not match");
+        /* does it have the right SMB "signature" ? */
+        if (*(__le32 *) smb->Protocol != cpu_to_le32(0x424d53ff)) {
+                cERROR(1, "Bad protocol string signature header 0x%x",
+                        *(unsigned int *)smb->Protocol);
+                return 1;
+        }
+
+        /* Make sure that message ids match */
+        if (mid != smb->Mid) {
+                cERROR(1, "Mids do not match. received=%u expected=%u",
+                        smb->Mid, mid);
+                return 1;
         }
-        cERROR(1, "bad smb detected. The Mid=%d", smb->Mid);
+
+        /* if it's a response then accept */
+        if (smb->Flags & SMBFLG_RESPONSE)
+                return 0;
+
+        /* only one valid case where server sends us request */
+        if (smb->Command == SMB_COM_LOCKING_ANDX)
+                return 0;
+
+        cERROR(1, "Server sent request, not response. mid=%u", smb->Mid);
         return 1;
 }
 
@@ -448,7 +461,7 @@ checkSMB(struct smb_hdr *smb, __u16 mid, unsigned int length)
                 return 1;
         }
 
-        if (checkSMBhdr(smb, mid))
+        if (check_smb_hdr(smb, mid))
                 return 1;
         clc_len = smbCalcSize_LE(smb);
 
@@ -465,25 +478,26 @@ checkSMB(struct smb_hdr *smb, __u16 mid, unsigned int length)
                         if (((4 + len) & 0xFFFF) == (clc_len & 0xFFFF))
                                 return 0; /* bcc wrapped */
                 }
-                cFYI(1, "Calculated size %d vs length %d mismatch for mid %d",
+                cFYI(1, "Calculated size %u vs length %u mismatch for mid=%u",
                                 clc_len, 4 + len, smb->Mid);
-                /* Windows XP can return a few bytes too much, presumably
-                an illegal pad, at the end of byte range lock responses
-                so we allow for that three byte pad, as long as actual
-                received length is as long or longer than calculated length */
-                /* We have now had to extend this more, since there is a
-                case in which it needs to be bigger still to handle a
-                malformed response to transact2 findfirst from WinXP when
-                access denied is returned and thus bcc and wct are zero
-                but server says length is 0x21 bytes too long as if the server
-                forget to reset the smb rfc1001 length when it reset the
-                wct and bcc to minimum size and drop the t2 parms and data */
-                if ((4+len > clc_len) && (len <= clc_len + 512))
-                        return 0;
-                else {
-                        cERROR(1, "RFC1001 size %d bigger than SMB for Mid=%d",
+
+                if (4 + len < clc_len) {
+                        cERROR(1, "RFC1001 size %u smaller than SMB for mid=%u",
                                         len, smb->Mid);
                         return 1;
+                } else if (len > clc_len + 512) {
+                        /*
+                         * Some servers (Windows XP in particular) send more
+                         * data than the lengths in the SMB packet would
+                         * indicate on certain calls (byte range locks and
+                         * trans2 find first calls in particular). While the
+                         * client can handle such a frame by ignoring the
+                         * trailing data, we choose limit the amount of extra
+                         * data to 512 bytes.
+                         */
+                        cERROR(1, "RFC1001 size %u more than 512 bytes larger "
+                                  "than SMB for mid=%u", len, smb->Mid);
+                        return 1;
                 }
         }
         return 0;
diff --git a/fs/cifs/netmisc.c b/fs/cifs/netmisc.c
index 8d9189f64477..79f641eeda30 100644
--- a/fs/cifs/netmisc.c
+++ b/fs/cifs/netmisc.c
@@ -170,7 +170,7 @@ cifs_convert_address(struct sockaddr *dst, const char *src, int len)
 {
         int rc, alen, slen;
         const char *pct;
-        char *endp, scope_id[13];
+        char scope_id[13];
         struct sockaddr_in *s4 = (struct sockaddr_in *) dst;
         struct sockaddr_in6 *s6 = (struct sockaddr_in6 *) dst;
 
@@ -197,9 +197,9 @@ cifs_convert_address(struct sockaddr *dst, const char *src, int len)
                 memcpy(scope_id, pct + 1, slen);
                 scope_id[slen] = '\0';
 
-                s6->sin6_scope_id = (u32) simple_strtoul(pct, &endp, 0);
-                if (endp != scope_id + slen)
-                        return 0;
+                rc = strict_strtoul(scope_id, 0,
+                                        (unsigned long *)&s6->sin6_scope_id);
+                rc = (rc == 0) ? 1 : 0;
         }
 
         return rc;
diff --git a/fs/cifs/readdir.c b/fs/cifs/readdir.c
index 7f25cc3d2256..f8e4cd2a7912 100644
--- a/fs/cifs/readdir.c
+++ b/fs/cifs/readdir.c
@@ -764,7 +764,6 @@ int cifs_readdir(struct file *file, void *direntry, filldir_t filldir)
 {
         int rc = 0;
         int xid, i;
-        struct cifs_sb_info *cifs_sb;
         struct cifsTconInfo *pTcon;
         struct cifsFileInfo *cifsFile = NULL;
         char *current_entry;
@@ -775,8 +774,6 @@ int cifs_readdir(struct file *file, void *direntry, filldir_t filldir)
 
         xid = GetXid();
 
-        cifs_sb = CIFS_SB(file->f_path.dentry->d_sb);
-
         /*
          * Ensure FindFirst doesn't fail before doing filldir() for '.' and
          * '..'. Otherwise we won't be able to notify VFS in case of failure.
diff --git a/fs/cifs/sess.c b/fs/cifs/sess.c
index 1adc9625a344..16765703131b 100644
--- a/fs/cifs/sess.c
+++ b/fs/cifs/sess.c
@@ -656,13 +656,13 @@ ssetup_ntlmssp_authenticate:
 
         if (type == LANMAN) {
 #ifdef CONFIG_CIFS_WEAK_PW_HASH
-                char lnm_session_key[CIFS_SESS_KEY_SIZE];
+                char lnm_session_key[CIFS_AUTH_RESP_SIZE];
 
                 pSMB->req.hdr.Flags2 &= ~SMBFLG2_UNICODE;
 
                 /* no capabilities flags in old lanman negotiation */
 
-                pSMB->old_req.PasswordLength = cpu_to_le16(CIFS_SESS_KEY_SIZE);
+                pSMB->old_req.PasswordLength = cpu_to_le16(CIFS_AUTH_RESP_SIZE);
 
                 /* Calculate hash with password and copy into bcc_ptr.
                  * Encryption Key (stored as in cryptkey) gets used if the
@@ -675,8 +675,8 @@ ssetup_ntlmssp_authenticate:
                                         true : false, lnm_session_key);
 
                 ses->flags |= CIFS_SES_LANMAN;
-                memcpy(bcc_ptr, (char *)lnm_session_key, CIFS_SESS_KEY_SIZE);
-                bcc_ptr += CIFS_SESS_KEY_SIZE;
+                memcpy(bcc_ptr, (char *)lnm_session_key, CIFS_AUTH_RESP_SIZE);
+                bcc_ptr += CIFS_AUTH_RESP_SIZE;
 
                 /* can not sign if LANMAN negotiated so no need
                 to calculate signing key? but what if server
diff --git a/fs/cifs/smbencrypt.c b/fs/cifs/smbencrypt.c
index b5450e9f40c0..b5041c849981 100644
--- a/fs/cifs/smbencrypt.c
+++ b/fs/cifs/smbencrypt.c
@@ -58,8 +58,9 @@ mdfour(unsigned char *md4_hash, unsigned char *link_str, int link_len)
 
         md4 = crypto_alloc_shash("md4", 0, 0);
         if (IS_ERR(md4)) {
+                rc = PTR_ERR(md4);
                 cERROR(1, "%s: Crypto md4 allocation error %d\n", __func__, rc);
-                return PTR_ERR(md4);
+                return rc;
         }
         size = sizeof(struct shash_desc) + crypto_shash_descsize(md4);
         sdescmd4 = kmalloc(size, GFP_KERNEL);
diff --git a/fs/cifs/transport.c b/fs/cifs/transport.c
index c1ccca1a933f..46d8756f2b24 100644
--- a/fs/cifs/transport.c
+++ b/fs/cifs/transport.c
@@ -236,9 +236,9 @@ smb_sendv(struct TCP_Server_Info *server, struct kvec *iov, int n_vec)
                 server->tcpStatus = CifsNeedReconnect;
         }
 
-        if (rc < 0) {
+        if (rc < 0 && rc != -EINTR)
                 cERROR(1, "Error %d sending data on socket to server", rc);
-        } else
+        else
                 rc = 0;
 
         /* Don't want to modify the buffer as a
@@ -359,6 +359,10 @@ cifs_call_async(struct TCP_Server_Info *server, struct smb_hdr *in_buf,
         if (rc)
                 return rc;
 
+        /* enable signing if server requires it */
+        if (server->secMode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
+                in_buf->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
+
         mutex_lock(&server->srv_mutex);
         mid = AllocMidQEntry(in_buf, server);
         if (mid == NULL) {
@@ -453,6 +457,9 @@ sync_mid_result(struct mid_q_entry *mid, struct TCP_Server_Info *server)
         case MID_RETRY_NEEDED:
                 rc = -EAGAIN;
                 break;
+        case MID_RESPONSE_MALFORMED:
+                rc = -EIO;
+                break;
         default:
                 cERROR(1, "%s: invalid mid state mid=%d state=%d", __func__,
                         mid->mid, mid->midState);
@@ -570,17 +577,33 @@ SendReceive2(const unsigned int xid, struct cifsSesInfo *ses,
 #endif
 
         mutex_unlock(&ses->server->srv_mutex);
-        cifs_small_buf_release(in_buf);
 
-        if (rc < 0)
+        if (rc < 0) {
+                cifs_small_buf_release(in_buf);
                 goto out;
+        }
 
-        if (long_op == CIFS_ASYNC_OP)
+        if (long_op == CIFS_ASYNC_OP) {
+                cifs_small_buf_release(in_buf);
                 goto out;
+        }
 
         rc = wait_for_response(ses->server, midQ);
-        if (rc != 0)
-                goto out;
+        if (rc != 0) {
+                send_nt_cancel(ses->server, in_buf, midQ);
+                spin_lock(&GlobalMid_Lock);
+                if (midQ->midState == MID_REQUEST_SUBMITTED) {
+                        midQ->callback = DeleteMidQEntry;
+                        spin_unlock(&GlobalMid_Lock);
+                        cifs_small_buf_release(in_buf);
+                        atomic_dec(&ses->server->inFlight);
+                        wake_up(&ses->server->request_q);
+                        return rc;
+                }
+                spin_unlock(&GlobalMid_Lock);
+        }
+
+        cifs_small_buf_release(in_buf);
 
         rc = sync_mid_result(midQ, ses->server);
         if (rc != 0) {
@@ -724,8 +747,19 @@ SendReceive(const unsigned int xid, struct cifsSesInfo *ses,
                 goto out;
 
         rc = wait_for_response(ses->server, midQ);
-        if (rc != 0)
-                goto out;
+        if (rc != 0) {
+                send_nt_cancel(ses->server, in_buf, midQ);
+                spin_lock(&GlobalMid_Lock);
+                if (midQ->midState == MID_REQUEST_SUBMITTED) {
+                        /* no longer considered to be "in-flight" */
+                        midQ->callback = DeleteMidQEntry;
+                        spin_unlock(&GlobalMid_Lock);
+                        atomic_dec(&ses->server->inFlight);
+                        wake_up(&ses->server->request_q);
+                        return rc;
+                }
+                spin_unlock(&GlobalMid_Lock);
+        }
 
         rc = sync_mid_result(midQ, ses->server);
         if (rc != 0) {
@@ -922,10 +956,21 @@ SendReceiveBlockingLock(const unsigned int xid, struct cifsTconInfo *tcon,
                         }
                 }
 
-                if (wait_for_response(ses->server, midQ) == 0) {
-                        /* We got the response - restart system call. */
-                        rstart = 1;
+                rc = wait_for_response(ses->server, midQ);
+                if (rc) {
+                        send_nt_cancel(ses->server, in_buf, midQ);
+                        spin_lock(&GlobalMid_Lock);
+                        if (midQ->midState == MID_REQUEST_SUBMITTED) {
+                                /* no longer considered to be "in-flight" */
+                                midQ->callback = DeleteMidQEntry;
+                                spin_unlock(&GlobalMid_Lock);
+                                return rc;
+                        }
+                        spin_unlock(&GlobalMid_Lock);
                 }
+
+                /* We got the response - restart system call. */
+                rstart = 1;
         }
 
         rc = sync_mid_result(midQ, ses->server);
diff --git a/fs/dlm/lowcomms.c b/fs/dlm/lowcomms.c
index 9c64ae9e4c1a..2d8c87b951c2 100644
--- a/fs/dlm/lowcomms.c
+++ b/fs/dlm/lowcomms.c
@@ -1468,15 +1468,13 @@ static void work_stop(void)
 
 static int work_start(void)
 {
-        recv_workqueue = alloc_workqueue("dlm_recv", WQ_MEM_RECLAIM |
-                                         WQ_HIGHPRI | WQ_FREEZEABLE, 0);
+        recv_workqueue = create_singlethread_workqueue("dlm_recv");
         if (!recv_workqueue) {
                 log_print("can't start dlm_recv");
                 return -ENOMEM;
         }
 
-        send_workqueue = alloc_workqueue("dlm_send", WQ_MEM_RECLAIM |
-                                         WQ_HIGHPRI | WQ_FREEZEABLE, 0);
+        send_workqueue = create_singlethread_workqueue("dlm_send");
         if (!send_workqueue) {
                 log_print("can't start dlm_send");
                 destroy_workqueue(recv_workqueue);
diff --git a/fs/ecryptfs/dentry.c b/fs/ecryptfs/dentry.c
index 6fc4f319b550..534c1d46e69e 100644
--- a/fs/ecryptfs/dentry.c
+++ b/fs/ecryptfs/dentry.c
@@ -46,24 +46,28 @@ static int ecryptfs_d_revalidate(struct dentry *dentry, struct nameidata *nd)
 {
         struct dentry *lower_dentry;
         struct vfsmount *lower_mnt;
-        struct dentry *dentry_save;
-        struct vfsmount *vfsmount_save;
+        struct dentry *dentry_save = NULL;
+        struct vfsmount *vfsmount_save = NULL;
         int rc = 1;
 
-        if (nd->flags & LOOKUP_RCU)
+        if (nd && nd->flags & LOOKUP_RCU)
                 return -ECHILD;
 
         lower_dentry = ecryptfs_dentry_to_lower(dentry);
         lower_mnt = ecryptfs_dentry_to_lower_mnt(dentry);
         if (!lower_dentry->d_op || !lower_dentry->d_op->d_revalidate)
                 goto out;
-        dentry_save = nd->path.dentry;
-        vfsmount_save = nd->path.mnt;
-        nd->path.dentry = lower_dentry;
-        nd->path.mnt = lower_mnt;
+        if (nd) {
+                dentry_save = nd->path.dentry;
+                vfsmount_save = nd->path.mnt;
+                nd->path.dentry = lower_dentry;
+                nd->path.mnt = lower_mnt;
+        }
         rc = lower_dentry->d_op->d_revalidate(lower_dentry, nd);
-        nd->path.dentry = dentry_save;
-        nd->path.mnt = vfsmount_save;
+        if (nd) {
+                nd->path.dentry = dentry_save;
+                nd->path.mnt = vfsmount_save;
+        }
         if (dentry->d_inode) {
                 struct inode *lower_inode =
                         ecryptfs_inode_to_lower(dentry->d_inode);
diff --git a/fs/ecryptfs/ecryptfs_kernel.h b/fs/ecryptfs/ecryptfs_kernel.h
index dbc84ed96336..e00753496e3e 100644
--- a/fs/ecryptfs/ecryptfs_kernel.h
+++ b/fs/ecryptfs/ecryptfs_kernel.h
@@ -632,8 +632,7 @@ int ecryptfs_interpose(struct dentry *hidden_dentry,
                        u32 flags);
 int ecryptfs_lookup_and_interpose_lower(struct dentry *ecryptfs_dentry,
                                         struct dentry *lower_dentry,
-                                        struct inode *ecryptfs_dir_inode,
-                                        struct nameidata *ecryptfs_nd);
+                                        struct inode *ecryptfs_dir_inode);
 int ecryptfs_decode_and_decrypt_filename(char **decrypted_name,
                                          size_t *decrypted_name_size,
                                          struct dentry *ecryptfs_dentry,
diff --git a/fs/ecryptfs/file.c b/fs/ecryptfs/file.c
index 81e10e6a9443..7d1050e254f9 100644
--- a/fs/ecryptfs/file.c
+++ b/fs/ecryptfs/file.c
@@ -317,6 +317,7 @@ ecryptfs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 
 const struct file_operations ecryptfs_dir_fops = {
         .readdir = ecryptfs_readdir,
+        .read = generic_read_dir,
         .unlocked_ioctl = ecryptfs_unlocked_ioctl,
 #ifdef CONFIG_COMPAT
         .compat_ioctl = ecryptfs_compat_ioctl,
diff --git a/fs/ecryptfs/inode.c b/fs/ecryptfs/inode.c
index bd33f87a1907..b592938a84bc 100644
--- a/fs/ecryptfs/inode.c
+++ b/fs/ecryptfs/inode.c
@@ -74,16 +74,20 @@ ecryptfs_create_underlying_file(struct inode *lower_dir_inode,
         unsigned int flags_save;
         int rc;
 
-        dentry_save = nd->path.dentry;
-        vfsmount_save = nd->path.mnt;
-        flags_save = nd->flags;
-        nd->path.dentry = lower_dentry;
-        nd->path.mnt = lower_mnt;
-        nd->flags &= ~LOOKUP_OPEN;
+        if (nd) {
+                dentry_save = nd->path.dentry;
+                vfsmount_save = nd->path.mnt;
+                flags_save = nd->flags;
+                nd->path.dentry = lower_dentry;
+                nd->path.mnt = lower_mnt;
+                nd->flags &= ~LOOKUP_OPEN;
+        }
         rc = vfs_create(lower_dir_inode, lower_dentry, mode, nd);
-        nd->path.dentry = dentry_save;
-        nd->path.mnt = vfsmount_save;
-        nd->flags = flags_save;
+        if (nd) {
+                nd->path.dentry = dentry_save;
+                nd->path.mnt = vfsmount_save;
+                nd->flags = flags_save;
+        }
         return rc;
 }
 
@@ -241,8 +245,7 @@ out:
  */
 int ecryptfs_lookup_and_interpose_lower(struct dentry *ecryptfs_dentry,
                                         struct dentry *lower_dentry,
-                                        struct inode *ecryptfs_dir_inode,
-                                        struct nameidata *ecryptfs_nd)
+                                        struct inode *ecryptfs_dir_inode)
 {
         struct dentry *lower_dir_dentry;
         struct vfsmount *lower_mnt;
@@ -290,8 +293,6 @@ int ecryptfs_lookup_and_interpose_lower(struct dentry *ecryptfs_dentry,
                 goto out;
         if (special_file(lower_inode->i_mode))
                 goto out;
-        if (!ecryptfs_nd)
-                goto out;
         /* Released in this function */
         page_virt = kmem_cache_zalloc(ecryptfs_header_cache_2, GFP_USER);
         if (!page_virt) {
@@ -349,75 +350,6 @@ out:
 }
 
 /**
- * ecryptfs_new_lower_dentry
- * @name: The name of the new dentry.
- * @lower_dir_dentry: Parent directory of the new dentry.
- * @nd: nameidata from last lookup.
- *
- * Create a new dentry or get it from lower parent dir.
- */
-static struct dentry *
-ecryptfs_new_lower_dentry(struct qstr *name, struct dentry *lower_dir_dentry,
-                          struct nameidata *nd)
-{
-        struct dentry *new_dentry;
-        struct dentry *tmp;
-        struct inode *lower_dir_inode;
-
-        lower_dir_inode = lower_dir_dentry->d_inode;
-
-        tmp = d_alloc(lower_dir_dentry, name);
-        if (!tmp)
-                return ERR_PTR(-ENOMEM);
-
-        mutex_lock(&lower_dir_inode->i_mutex);
-        new_dentry = lower_dir_inode->i_op->lookup(lower_dir_inode, tmp, nd);
-        mutex_unlock(&lower_dir_inode->i_mutex);
-
-        if (!new_dentry)
-                new_dentry = tmp;
-        else
-                dput(tmp);
-
-        return new_dentry;
-}
-
-
-/**
- * ecryptfs_lookup_one_lower
- * @ecryptfs_dentry: The eCryptfs dentry that we are looking up
- * @lower_dir_dentry: lower parent directory
- * @name: lower file name
- *
- * Get the lower dentry from vfs. If lower dentry does not exist yet,
- * create it.
- */
-static struct dentry *
-ecryptfs_lookup_one_lower(struct dentry *ecryptfs_dentry,
-                          struct dentry *lower_dir_dentry, struct qstr *name)
-{
-        struct nameidata nd;
-        struct vfsmount *lower_mnt;
-        int err;
-
-        lower_mnt = mntget(ecryptfs_dentry_to_lower_mnt(
-                                    ecryptfs_dentry->d_parent));
-        err = vfs_path_lookup(lower_dir_dentry, lower_mnt, name->name , 0, &nd);
-        mntput(lower_mnt);
-
-        if (!err) {
-                /* we dont need the mount */
-                mntput(nd.path.mnt);
-                return nd.path.dentry;
-        }
-        if (err != -ENOENT)
-                return ERR_PTR(err);
-
-        /* create a new lower dentry */
-        return ecryptfs_new_lower_dentry(name, lower_dir_dentry, &nd);
-}
-
-/**
  * ecryptfs_lookup
  * @ecryptfs_dir_inode: The eCryptfs directory inode
  * @ecryptfs_dentry: The eCryptfs dentry that we are looking up
@@ -434,7 +366,6 @@ static struct dentry *ecryptfs_lookup(struct inode *ecryptfs_dir_inode,
         size_t encrypted_and_encoded_name_size;
         struct ecryptfs_mount_crypt_stat *mount_crypt_stat = NULL;
         struct dentry *lower_dir_dentry, *lower_dentry;
-        struct qstr lower_name;
         int rc = 0;
 
         if ((ecryptfs_dentry->d_name.len == 1
@@ -444,20 +375,14 @@ static struct dentry *ecryptfs_lookup(struct inode *ecryptfs_dir_inode,
                 goto out_d_drop;
         }
         lower_dir_dentry = ecryptfs_dentry_to_lower(ecryptfs_dentry->d_parent);
-        lower_name.name = ecryptfs_dentry->d_name.name;
-        lower_name.len = ecryptfs_dentry->d_name.len;
-        lower_name.hash = ecryptfs_dentry->d_name.hash;
-        if (lower_dir_dentry->d_op && lower_dir_dentry->d_op->d_hash) {
-                rc = lower_dir_dentry->d_op->d_hash(lower_dir_dentry,
-                                lower_dir_dentry->d_inode, &lower_name);
-                if (rc < 0)
-                        goto out_d_drop;
-        }
-        lower_dentry = ecryptfs_lookup_one_lower(ecryptfs_dentry,
-                                                 lower_dir_dentry, &lower_name);
+        mutex_lock(&lower_dir_dentry->d_inode->i_mutex);
+        lower_dentry = lookup_one_len(ecryptfs_dentry->d_name.name,
+                                      lower_dir_dentry,
+                                      ecryptfs_dentry->d_name.len);
+        mutex_unlock(&lower_dir_dentry->d_inode->i_mutex);
         if (IS_ERR(lower_dentry)) {
                 rc = PTR_ERR(lower_dentry);
-                ecryptfs_printk(KERN_DEBUG, "%s: lookup_one_lower() returned "
+                ecryptfs_printk(KERN_DEBUG, "%s: lookup_one_len() returned "
                                 "[%d] on lower_dentry = [%s]\n", __func__, rc,
                                 encrypted_and_encoded_name);
                 goto out_d_drop;
@@ -479,28 +404,21 @@ static struct dentry *ecryptfs_lookup(struct inode *ecryptfs_dir_inode,
                        "filename; rc = [%d]\n", __func__, rc);
                 goto out_d_drop;
         }
-        lower_name.name = encrypted_and_encoded_name;
-        lower_name.len = encrypted_and_encoded_name_size;
-        lower_name.hash = full_name_hash(lower_name.name, lower_name.len);
-        if (lower_dir_dentry->d_op && lower_dir_dentry->d_op->d_hash) {
-                rc = lower_dir_dentry->d_op->d_hash(lower_dir_dentry,
-                                lower_dir_dentry->d_inode, &lower_name);
-                if (rc < 0)
-                        goto out_d_drop;
-        }
-        lower_dentry = ecryptfs_lookup_one_lower(ecryptfs_dentry,
-                                                 lower_dir_dentry, &lower_name);
+        mutex_lock(&lower_dir_dentry->d_inode->i_mutex);
+        lower_dentry = lookup_one_len(encrypted_and_encoded_name,
+                                      lower_dir_dentry,
+                                      encrypted_and_encoded_name_size);
+        mutex_unlock(&lower_dir_dentry->d_inode->i_mutex);
         if (IS_ERR(lower_dentry)) {
                 rc = PTR_ERR(lower_dentry);
-                ecryptfs_printk(KERN_DEBUG, "%s: lookup_one_lower() returned "
+                ecryptfs_printk(KERN_DEBUG, "%s: lookup_one_len() returned "
                                 "[%d] on lower_dentry = [%s]\n", __func__, rc,
                                 encrypted_and_encoded_name);
                 goto out_d_drop;
         }
 lookup_and_interpose:
         rc = ecryptfs_lookup_and_interpose_lower(ecryptfs_dentry, lower_dentry,
-                                                 ecryptfs_dir_inode,
-                                                 ecryptfs_nd);
+                                                 ecryptfs_dir_inode);
         goto out;
 out_d_drop:
         d_drop(ecryptfs_dentry);
@@ -1092,6 +1010,8 @@ int ecryptfs_getattr(struct vfsmount *mnt, struct dentry *dentry,
         rc = vfs_getattr(ecryptfs_dentry_to_lower_mnt(dentry),
                          ecryptfs_dentry_to_lower(dentry), &lower_stat);
         if (!rc) {
+                fsstack_copy_attr_all(dentry->d_inode,
+                                      ecryptfs_inode_to_lower(dentry->d_inode));
                 generic_fillattr(dentry->d_inode, stat);
                 stat->blocks = lower_stat.blocks;
         }
diff --git a/fs/eventfd.c b/fs/eventfd.c
index e0194b3e14d6..d9a591773919 100644
--- a/fs/eventfd.c
+++ b/fs/eventfd.c
@@ -99,7 +99,7 @@ EXPORT_SYMBOL_GPL(eventfd_ctx_get);
  * @ctx: [in] Pointer to eventfd context.
  *
  * The eventfd context reference must have been previously acquired either
- * with eventfd_ctx_get() or eventfd_ctx_fdget()).
+ * with eventfd_ctx_get() or eventfd_ctx_fdget().
  */
 void eventfd_ctx_put(struct eventfd_ctx *ctx)
 {
@@ -146,9 +146,9 @@ static void eventfd_ctx_do_read(struct eventfd_ctx *ctx, __u64 *cnt)
  * eventfd_ctx_remove_wait_queue - Read the current counter and removes wait queue.
  * @ctx: [in] Pointer to eventfd context.
  * @wait: [in] Wait queue to be removed.
- * @cnt: [out] Pointer to the 64bit conter value.
+ * @cnt: [out] Pointer to the 64-bit counter value.
  *
- * Returns zero if successful, or the following error codes:
+ * Returns %0 if successful, or the following error codes:
  *
  * -EAGAIN      : The operation would have blocked.
  *
@@ -175,11 +175,11 @@ EXPORT_SYMBOL_GPL(eventfd_ctx_remove_wait_queue);
  * eventfd_ctx_read - Reads the eventfd counter or wait if it is zero.
  * @ctx: [in] Pointer to eventfd context.
  * @no_wait: [in] Different from zero if the operation should not block.
- * @cnt: [out] Pointer to the 64bit conter value.
+ * @cnt: [out] Pointer to the 64-bit counter value.
  *
- * Returns zero if successful, or the following error codes:
+ * Returns %0 if successful, or the following error codes:
  *
- * -EAGAIN      : The operation would have blocked but @no_wait was nonzero.
+ * -EAGAIN      : The operation would have blocked but @no_wait was non-zero.
  * -ERESTARTSYS : A signal interrupted the wait operation.
  *
  * If @no_wait is zero, the function might sleep until the eventfd internal
diff --git a/fs/eventpoll.c b/fs/eventpoll.c
index cc8a9b7d6064..267d0ada4541 100644
--- a/fs/eventpoll.c
+++ b/fs/eventpoll.c
@@ -1114,6 +1114,17 @@ static int ep_send_events(struct eventpoll *ep,
         return ep_scan_ready_list(ep, ep_send_events_proc, &esed);
 }
 
+static inline struct timespec ep_set_mstimeout(long ms)
+{
+        struct timespec now, ts = {
+                .tv_sec = ms / MSEC_PER_SEC,
+                .tv_nsec = NSEC_PER_MSEC * (ms % MSEC_PER_SEC),
+        };
+
+        ktime_get_ts(&now);
+        return timespec_add_safe(now, ts);
+}
+
 static int ep_poll(struct eventpoll *ep, struct epoll_event __user *events,
                    int maxevents, long timeout)
 {
@@ -1121,12 +1132,11 @@ static int ep_poll(struct eventpoll *ep, struct epoll_event __user *events,
         unsigned long flags;
         long slack;
         wait_queue_t wait;
-        struct timespec end_time;
         ktime_t expires, *to = NULL;
 
         if (timeout > 0) {
-                ktime_get_ts(&end_time);
-                timespec_add_ns(&end_time, (u64)timeout * NSEC_PER_MSEC);
+                struct timespec end_time = ep_set_mstimeout(timeout);
+
                 slack = select_estimate_accuracy(&end_time);
                 to = &expires;
                 *to = timespec_to_ktime(end_time);
diff --git a/fs/exec.c b/fs/exec.c
index c62efcb959c7..52a447d9b6ab 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -120,7 +120,7 @@ SYSCALL_DEFINE1(uselib, const char __user *, library)
                 goto out;
 
         file = do_filp_open(AT_FDCWD, tmp,
-                                O_LARGEFILE | O_RDONLY | FMODE_EXEC, 0,
+                                O_LARGEFILE | O_RDONLY | __FMODE_EXEC, 0,
                                 MAY_READ | MAY_EXEC | MAY_OPEN);
         putname(tmp);
         error = PTR_ERR(file);
@@ -723,7 +723,7 @@ struct file *open_exec(const char *name)
         int err;
 
         file = do_filp_open(AT_FDCWD, name,
-                                O_LARGEFILE | O_RDONLY | FMODE_EXEC, 0,
+                                O_LARGEFILE | O_RDONLY | __FMODE_EXEC, 0,
                                 MAY_EXEC | MAY_OPEN);
         if (IS_ERR(file))
                 goto out;
diff --git a/fs/exofs/inode.c b/fs/exofs/inode.c
index 42685424817b..a7555238c41a 100644
--- a/fs/exofs/inode.c
+++ b/fs/exofs/inode.c
@@ -1030,7 +1030,6 @@ struct inode *exofs_iget(struct super_block *sb, unsigned long ino)
                 memcpy(oi->i_data, fcb.i_data, sizeof(fcb.i_data));
         }
 
-        inode->i_mapping->backing_dev_info = sb->s_bdi;
         if (S_ISREG(inode->i_mode)) {
                 inode->i_op = &exofs_file_inode_operations;
                 inode->i_fop = &exofs_file_operations;
@@ -1131,7 +1130,6 @@ struct inode *exofs_new_inode(struct inode *dir, int mode)
 
         sbi = sb->s_fs_info;
 
-        inode->i_mapping->backing_dev_info = sb->s_bdi;
         sb->s_dirt = 1;
         inode_init_owner(inode, dir, mode);
         inode->i_ino = sbi->s_nextid++;
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index 0c8d97b56f34..3aa0b72b3b94 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -848,6 +848,7 @@ struct ext4_inode_info {
         atomic_t i_ioend_count; /* Number of outstanding io_end structs */
         /* current io_end structure for async DIO write*/
         ext4_io_end_t *cur_aio_dio;
+        atomic_t i_aiodio_unwritten; /* Nr. of inflight conversions pending */
 
         spinlock_t i_block_reservation_lock;
 
@@ -2119,6 +2120,15 @@ static inline void set_bitmap_uptodate(struct buffer_head *bh)
 
 #define in_range(b, first, len) ((b) >= (first) && (b) <= (first) + (len) - 1)
 
+/* For ioend & aio unwritten conversion wait queues */
+#define EXT4_WQ_HASH_SZ         37
+#define ext4_ioend_wq(v)   (&ext4__ioend_wq[((unsigned long)(v)) %\
+                                            EXT4_WQ_HASH_SZ])
+#define ext4_aio_mutex(v)  (&ext4__aio_mutex[((unsigned long)(v)) %\
+                                             EXT4_WQ_HASH_SZ])
+extern wait_queue_head_t ext4__ioend_wq[EXT4_WQ_HASH_SZ];
+extern struct mutex ext4__aio_mutex[EXT4_WQ_HASH_SZ];
+
 #endif  /* __KERNEL__ */
 
 #endif  /* _EXT4_H */
diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
index 63a75810b7c3..ccce8a7e94ed 100644
--- a/fs/ext4/extents.c
+++ b/fs/ext4/extents.c
@@ -3174,9 +3174,10 @@ ext4_ext_handle_uninitialized_extents(handle_t *handle, struct inode *inode,
                  * that this IO needs to convertion to written when IO is
                  * completed
                  */
-                if (io)
+                if (io && !(io->flag & EXT4_IO_END_UNWRITTEN)) {
                         io->flag = EXT4_IO_END_UNWRITTEN;
-                else
+                        atomic_inc(&EXT4_I(inode)->i_aiodio_unwritten);
+                } else
                         ext4_set_inode_state(inode, EXT4_STATE_DIO_UNWRITTEN);
                 if (ext4_should_dioread_nolock(inode))
                         map->m_flags |= EXT4_MAP_UNINIT;
@@ -3463,9 +3464,10 @@ int ext4_ext_map_blocks(handle_t *handle, struct inode *inode,
                  * that we need to perform convertion when IO is done.
                  */
                 if ((flags & EXT4_GET_BLOCKS_PRE_IO)) {
-                        if (io)
+                        if (io && !(io->flag & EXT4_IO_END_UNWRITTEN)) {
                                 io->flag = EXT4_IO_END_UNWRITTEN;
-                        else
+                                atomic_inc(&EXT4_I(inode)->i_aiodio_unwritten);
+                        } else
                                 ext4_set_inode_state(inode,
                                                      EXT4_STATE_DIO_UNWRITTEN);
                 }
diff --git a/fs/ext4/file.c b/fs/ext4/file.c
index 2e8322c8aa88..7b80d543b89e 100644
--- a/fs/ext4/file.c
+++ b/fs/ext4/file.c
@@ -55,11 +55,47 @@ static int ext4_release_file(struct inode *inode, struct file *filp)
         return 0;
 }
 
+static void ext4_aiodio_wait(struct inode *inode)
+{
+        wait_queue_head_t *wq = ext4_ioend_wq(inode);
+
+        wait_event(*wq, (atomic_read(&EXT4_I(inode)->i_aiodio_unwritten) == 0));
+}
+
+/*
+ * This tests whether the IO in question is block-aligned or not.
+ * Ext4 utilizes unwritten extents when hole-filling during direct IO, and they
+ * are converted to written only after the IO is complete.  Until they are
+ * mapped, these blocks appear as holes, so dio_zero_block() will assume that
+ * it needs to zero out portions of the start and/or end block.  If 2 AIO
+ * threads are at work on the same unwritten block, they must be synchronized
+ * or one thread will zero the other's data, causing corruption.
+ */
+static int
+ext4_unaligned_aio(struct inode *inode, const struct iovec *iov,
+                   unsigned long nr_segs, loff_t pos)
+{
+        struct super_block *sb = inode->i_sb;
+        int blockmask = sb->s_blocksize - 1;
+        size_t count = iov_length(iov, nr_segs);
+        loff_t final_size = pos + count;
+
+        if (pos >= inode->i_size)
+                return 0;
+
+        if ((pos & blockmask) || (final_size & blockmask))
+                return 1;
+
+        return 0;
+}
+
 static ssize_t
 ext4_file_write(struct kiocb *iocb, const struct iovec *iov,
                 unsigned long nr_segs, loff_t pos)
 {
         struct inode *inode = iocb->ki_filp->f_path.dentry->d_inode;
+        int unaligned_aio = 0;
+        int ret;
 
         /*
          * If we have encountered a bitmap-format file, the size limit
@@ -78,9 +114,31 @@ ext4_file_write(struct kiocb *iocb, const struct iovec *iov,
                         nr_segs = iov_shorten((struct iovec *)iov, nr_segs,
                                               sbi->s_bitmap_maxbytes - pos);
                 }
+        } else if (unlikely((iocb->ki_filp->f_flags & O_DIRECT) &&
+                   !is_sync_kiocb(iocb))) {
+                unaligned_aio = ext4_unaligned_aio(inode, iov, nr_segs, pos);
         }
 
-        return generic_file_aio_write(iocb, iov, nr_segs, pos);
+        /* Unaligned direct AIO must be serialized; see comment above */
+        if (unaligned_aio) {
+                static unsigned long unaligned_warn_time;
+
+                /* Warn about this once per day */
+                if (printk_timed_ratelimit(&unaligned_warn_time, 60*60*24*HZ))
+                        ext4_msg(inode->i_sb, KERN_WARNING,
+                                 "Unaligned AIO/DIO on inode %ld by %s; "
+                                 "performance will be poor.",
+                                 inode->i_ino, current->comm);
+                mutex_lock(ext4_aio_mutex(inode));
+                ext4_aiodio_wait(inode);
+        }
+
+        ret = generic_file_aio_write(iocb, iov, nr_segs, pos);
+
+        if (unaligned_aio)
+                mutex_unlock(ext4_aio_mutex(inode));
+
+        return ret;
 }
 
 static const struct vm_operations_struct ext4_file_vm_ops = {
diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index 851f49b2f9d2..d1fe09aea73d 100644
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -342,10 +342,15 @@ static struct kmem_cache *ext4_free_ext_cachep;
 /* We create slab caches for groupinfo data structures based on the
  * superblock block size.  There will be one per mounted filesystem for
  * each unique s_blocksize_bits */
-#define NR_GRPINFO_CACHES       \
-        (EXT4_MAX_BLOCK_LOG_SIZE - EXT4_MIN_BLOCK_LOG_SIZE + 1)
+#define NR_GRPINFO_CACHES 8
 static struct kmem_cache *ext4_groupinfo_caches[NR_GRPINFO_CACHES];
 
+static const char *ext4_groupinfo_slab_names[NR_GRPINFO_CACHES] = {
+        "ext4_groupinfo_1k", "ext4_groupinfo_2k", "ext4_groupinfo_4k",
+        "ext4_groupinfo_8k", "ext4_groupinfo_16k", "ext4_groupinfo_32k",
+        "ext4_groupinfo_64k", "ext4_groupinfo_128k"
+};
+
 static void ext4_mb_generate_from_pa(struct super_block *sb, void *bitmap,
                                         ext4_group_t group);
 static void ext4_mb_generate_from_freelist(struct super_block *sb, void *bitmap,
@@ -2414,6 +2419,55 @@ err_freesgi:
         return -ENOMEM;
 }
 
+static void ext4_groupinfo_destroy_slabs(void)
+{
+        int i;
+
+        for (i = 0; i < NR_GRPINFO_CACHES; i++) {
+                if (ext4_groupinfo_caches[i])
+                        kmem_cache_destroy(ext4_groupinfo_caches[i]);
+                ext4_groupinfo_caches[i] = NULL;
+        }
+}
+
+static int ext4_groupinfo_create_slab(size_t size)
+{
+        static DEFINE_MUTEX(ext4_grpinfo_slab_create_mutex);
+        int slab_size;
+        int blocksize_bits = order_base_2(size);
+        int cache_index = blocksize_bits - EXT4_MIN_BLOCK_LOG_SIZE;
+        struct kmem_cache *cachep;
+
+        if (cache_index >= NR_GRPINFO_CACHES)
+                return -EINVAL;
+
+        if (unlikely(cache_index < 0))
+                cache_index = 0;
+
+        mutex_lock(&ext4_grpinfo_slab_create_mutex);
+        if (ext4_groupinfo_caches[cache_index]) {
+                mutex_unlock(&ext4_grpinfo_slab_create_mutex);
+                return 0;       /* Already created */
+        }
+
+        slab_size = offsetof(struct ext4_group_info,
+                                bb_counters[blocksize_bits + 2]);
+
+        cachep = kmem_cache_create(ext4_groupinfo_slab_names[cache_index],
+                                        slab_size, 0, SLAB_RECLAIM_ACCOUNT,
+                                        NULL);
+
+        mutex_unlock(&ext4_grpinfo_slab_create_mutex);
+        if (!cachep) {
+                printk(KERN_EMERG "EXT4: no memory for groupinfo slab cache\n");
+                return -ENOMEM;
+        }
+
+        ext4_groupinfo_caches[cache_index] = cachep;
+
+        return 0;
+}
+
 int ext4_mb_init(struct super_block *sb, int needs_recovery)
 {
         struct ext4_sb_info *sbi = EXT4_SB(sb);
@@ -2421,9 +2475,6 @@ int ext4_mb_init(struct super_block *sb, int needs_recovery)
         unsigned offset;
         unsigned max;
         int ret;
-        int cache_index;
-        struct kmem_cache *cachep;
-        char *namep = NULL;
 
         i = (sb->s_blocksize_bits + 2) * sizeof(*sbi->s_mb_offsets);
 
@@ -2440,30 +2491,9 @@ int ext4_mb_init(struct super_block *sb, int needs_recovery)
                 goto out;
         }
 
-        cache_index = sb->s_blocksize_bits - EXT4_MIN_BLOCK_LOG_SIZE;
-        cachep = ext4_groupinfo_caches[cache_index];
-        if (!cachep) {
-                char name[32];
-                int len = offsetof(struct ext4_group_info,
-                                        bb_counters[sb->s_blocksize_bits + 2]);
-
-                sprintf(name, "ext4_groupinfo_%d", sb->s_blocksize_bits);
-                namep = kstrdup(name, GFP_KERNEL);
-                if (!namep) {
-                        ret = -ENOMEM;
-                        goto out;
-                }
-
-                /* Need to free the kmem_cache_name() when we
-                 * destroy the slab */
-                cachep = kmem_cache_create(namep, len, 0,
-                                             SLAB_RECLAIM_ACCOUNT, NULL);
-                if (!cachep) {
-                        ret = -ENOMEM;
-                        goto out;
-                }
-                ext4_groupinfo_caches[cache_index] = cachep;
-        }
+        ret = ext4_groupinfo_create_slab(sb->s_blocksize);
+        if (ret < 0)
+                goto out;
 
         /* order 0 is regular bitmap */
         sbi->s_mb_maxs[0] = sb->s_blocksize << 3;
@@ -2520,7 +2550,6 @@ out:
         if (ret) {
                 kfree(sbi->s_mb_offsets);
                 kfree(sbi->s_mb_maxs);
-                kfree(namep);
         }
         return ret;
 }
@@ -2734,7 +2763,6 @@ int __init ext4_init_mballoc(void)
 
 void ext4_exit_mballoc(void)
 {
-        int i;
         /*
          * Wait for completion of call_rcu()'s on ext4_pspace_cachep
          * before destroying the slab cache.
@@ -2743,15 +2771,7 @@ void ext4_exit_mballoc(void)
         kmem_cache_destroy(ext4_pspace_cachep);
         kmem_cache_destroy(ext4_ac_cachep);
         kmem_cache_destroy(ext4_free_ext_cachep);
-
-        for (i = 0; i < NR_GRPINFO_CACHES; i++) {
-                struct kmem_cache *cachep = ext4_groupinfo_caches[i];
-                if (cachep) {
-                        char *name = (char *)kmem_cache_name(cachep);
-                        kmem_cache_destroy(cachep);
-                        kfree(name);
-                }
-        }
+        ext4_groupinfo_destroy_slabs();
         ext4_remove_debugfs_entry();
 }
 
diff --git a/fs/ext4/page-io.c b/fs/ext4/page-io.c
index 7270dcfca92a..955cc309142f 100644
--- a/fs/ext4/page-io.c
+++ b/fs/ext4/page-io.c
@@ -32,14 +32,8 @@
 
 static struct kmem_cache *io_page_cachep, *io_end_cachep;
 
-#define WQ_HASH_SZ              37
-#define to_ioend_wq(v)  (&ioend_wq[((unsigned long)v) % WQ_HASH_SZ])
-static wait_queue_head_t ioend_wq[WQ_HASH_SZ];
-
 int __init ext4_init_pageio(void)
 {
-        int i;
-
         io_page_cachep = KMEM_CACHE(ext4_io_page, SLAB_RECLAIM_ACCOUNT);
         if (io_page_cachep == NULL)
                 return -ENOMEM;
@@ -48,9 +42,6 @@ int __init ext4_init_pageio(void)
                 kmem_cache_destroy(io_page_cachep);
                 return -ENOMEM;
         }
-        for (i = 0; i < WQ_HASH_SZ; i++)
-                init_waitqueue_head(&ioend_wq[i]);
-
         return 0;
 }
 
@@ -62,7 +53,7 @@ void ext4_exit_pageio(void)
 
 void ext4_ioend_wait(struct inode *inode)
 {
-        wait_queue_head_t *wq = to_ioend_wq(inode);
+        wait_queue_head_t *wq = ext4_ioend_wq(inode);
 
         wait_event(*wq, (atomic_read(&EXT4_I(inode)->i_ioend_count) == 0));
 }
@@ -87,7 +78,7 @@ void ext4_free_io_end(ext4_io_end_t *io)
         for (i = 0; i < io->num_io_pages; i++)
                 put_io_page(io->pages[i]);
         io->num_io_pages = 0;
-        wq = to_ioend_wq(io->inode);
+        wq = ext4_ioend_wq(io->inode);
         if (atomic_dec_and_test(&EXT4_I(io->inode)->i_ioend_count) &&
             waitqueue_active(wq))
                 wake_up_all(wq);
@@ -102,6 +93,7 @@ int ext4_end_io_nolock(ext4_io_end_t *io)
         struct inode *inode = io->inode;
         loff_t offset = io->offset;
         ssize_t size = io->size;
+        wait_queue_head_t *wq;
         int ret = 0;
 
         ext4_debug("ext4_end_io_nolock: io 0x%p from inode %lu,list->next 0x%p,"
@@ -126,7 +118,16 @@ int ext4_end_io_nolock(ext4_io_end_t *io)
         if (io->iocb)
                 aio_complete(io->iocb, io->result, 0);
         /* clear the DIO AIO unwritten flag */
-        io->flag &= ~EXT4_IO_END_UNWRITTEN;
+        if (io->flag & EXT4_IO_END_UNWRITTEN) {
+                io->flag &= ~EXT4_IO_END_UNWRITTEN;
+                /* Wake up anyone waiting on unwritten extent conversion */
+                wq = ext4_ioend_wq(io->inode);
+                if (atomic_dec_and_test(&EXT4_I(inode)->i_aiodio_unwritten) &&
+                    waitqueue_active(wq)) {
+                        wake_up_all(wq);
+                }
+        }
+
         return ret;
 }
 
@@ -190,6 +191,7 @@ static void ext4_end_bio(struct bio *bio, int error)
         struct inode *inode;
         unsigned long flags;
         int i;
+        sector_t bi_sector = bio->bi_sector;
 
         BUG_ON(!io_end);
         bio->bi_private = NULL;
@@ -207,9 +209,7 @@ static void ext4_end_bio(struct bio *bio, int error)
                 if (error)
                         SetPageError(page);
                 BUG_ON(!head);
-                if (head->b_size == PAGE_CACHE_SIZE)
-                        clear_buffer_dirty(head);
-                else {
+                if (head->b_size != PAGE_CACHE_SIZE) {
                         loff_t offset;
                         loff_t io_end_offset = io_end->offset + io_end->size;
 
@@ -221,7 +221,6 @@ static void ext4_end_bio(struct bio *bio, int error)
                                         if (error)
                                                 buffer_io_error(bh);
 
-                                        clear_buffer_dirty(bh);
                                 }
                                 if (buffer_delay(bh))
                                         partial_write = 1;
@@ -257,7 +256,7 @@ static void ext4_end_bio(struct bio *bio, int error)
                              (unsigned long long) io_end->offset,
                              (long) io_end->size,
                              (unsigned long long)
-                             bio->bi_sector >> (inode->i_blkbits - 9));
+                             bi_sector >> (inode->i_blkbits - 9));
         }
 
         /* Add the io_end to per-inode completed io list*/
@@ -380,6 +379,7 @@ int ext4_bio_write_page(struct ext4_io_submit *io,
 
         blocksize = 1 << inode->i_blkbits;
 
+        BUG_ON(!PageLocked(page));
         BUG_ON(PageWriteback(page));
         set_page_writeback(page);
         ClearPageError(page);
@@ -397,12 +397,14 @@ int ext4_bio_write_page(struct ext4_io_submit *io,
         for (bh = head = page_buffers(page), block_start = 0;
              bh != head || !block_start;
              block_start = block_end, bh = bh->b_this_page) {
+
                 block_end = block_start + blocksize;
                 if (block_start >= len) {
                         clear_buffer_dirty(bh);
                         set_buffer_uptodate(bh);
                         continue;
                 }
+                clear_buffer_dirty(bh);
                 ret = io_submit_add_bh(io, io_page, inode, wbc, bh);
                 if (ret) {
                         /*
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 48ce561fafac..f6a318f836b2 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -77,6 +77,7 @@ static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags,
                        const char *dev_name, void *data);
 static void ext4_destroy_lazyinit_thread(void);
 static void ext4_unregister_li_request(struct super_block *sb);
+static void ext4_clear_request_list(void);
 
 #if !defined(CONFIG_EXT3_FS) && !defined(CONFIG_EXT3_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23)
 static struct file_system_type ext3_fs_type = {
@@ -832,6 +833,7 @@ static struct inode *ext4_alloc_inode(struct super_block *sb)
         ei->i_sync_tid = 0;
         ei->i_datasync_tid = 0;
         atomic_set(&ei->i_ioend_count, 0);
+        atomic_set(&ei->i_aiodio_unwritten, 0);
 
         return &ei->vfs_inode;
 }
@@ -2716,6 +2718,8 @@ static void ext4_unregister_li_request(struct super_block *sb)
         mutex_unlock(&ext4_li_info->li_list_mtx);
 }
 
+static struct task_struct *ext4_lazyinit_task;
+
 /*
  * This is the function where ext4lazyinit thread lives. It walks
  * through the request list searching for next scheduled filesystem.
@@ -2784,6 +2788,10 @@ cont_thread:
                 if (time_before(jiffies, next_wakeup))
                         schedule();
                 finish_wait(&eli->li_wait_daemon, &wait);
+                if (kthread_should_stop()) {
+                        ext4_clear_request_list();
+                        goto exit_thread;
+                }
         }
 
 exit_thread:
@@ -2808,6 +2816,7 @@ exit_thread:
         wake_up(&eli->li_wait_task);
 
         kfree(ext4_li_info);
+        ext4_lazyinit_task = NULL;
         ext4_li_info = NULL;
         mutex_unlock(&ext4_li_mtx);
 
@@ -2830,11 +2839,10 @@ static void ext4_clear_request_list(void)
 
 static int ext4_run_lazyinit_thread(void)
 {
-        struct task_struct *t;
-
-        t = kthread_run(ext4_lazyinit_thread, ext4_li_info, "ext4lazyinit");
-        if (IS_ERR(t)) {
-                int err = PTR_ERR(t);
+        ext4_lazyinit_task = kthread_run(ext4_lazyinit_thread,
+                                         ext4_li_info, "ext4lazyinit");
+        if (IS_ERR(ext4_lazyinit_task)) {
+                int err = PTR_ERR(ext4_lazyinit_task);
                 ext4_clear_request_list();
                 del_timer_sync(&ext4_li_info->li_timer);
                 kfree(ext4_li_info);
@@ -2985,16 +2993,10 @@ static void ext4_destroy_lazyinit_thread(void)
          * If thread exited earlier
          * there's nothing to be done.
          */
-        if (!ext4_li_info)
+        if (!ext4_li_info || !ext4_lazyinit_task)
                 return;
 
-        ext4_clear_request_list();
-
-        while (ext4_li_info->li_task) {
-                wake_up(&ext4_li_info->li_wait_daemon);
-                wait_event(ext4_li_info->li_wait_task,
-                           ext4_li_info->li_task == NULL);
-        }
+        kthread_stop(ext4_lazyinit_task);
 }
 
 static int ext4_fill_super(struct super_block *sb, void *data, int silent)
@@ -4768,7 +4770,7 @@ static struct file_system_type ext4_fs_type = {
         .fs_flags       = FS_REQUIRES_DEV,
 };
 
-int __init ext4_init_feat_adverts(void)
+static int __init ext4_init_feat_adverts(void)
 {
         struct ext4_features *ef;
         int ret = -ENOMEM;
@@ -4792,23 +4794,44 @@ out:
         return ret;
 }
 
+static void ext4_exit_feat_adverts(void)
+{
+        kobject_put(&ext4_feat->f_kobj);
+        wait_for_completion(&ext4_feat->f_kobj_unregister);
+        kfree(ext4_feat);
+}
+
+/* Shared across all ext4 file systems */
+wait_queue_head_t ext4__ioend_wq[EXT4_WQ_HASH_SZ];
+struct mutex ext4__aio_mutex[EXT4_WQ_HASH_SZ];
+
 static int __init ext4_init_fs(void)
 {
-        int err;
+        int i, err;
 
         ext4_check_flag_values();
+
+        for (i = 0; i < EXT4_WQ_HASH_SZ; i++) {
+                mutex_init(&ext4__aio_mutex[i]);
+                init_waitqueue_head(&ext4__ioend_wq[i]);
+        }
+
         err = ext4_init_pageio();
         if (err)
                 return err;
         err = ext4_init_system_zone();
         if (err)
-                goto out5;
+                goto out7;
         ext4_kset = kset_create_and_add("ext4", NULL, fs_kobj);
         if (!ext4_kset)
-                goto out4;
+                goto out6;
         ext4_proc_root = proc_mkdir("fs/ext4", NULL);
+        if (!ext4_proc_root)
+                goto out5;
 
         err = ext4_init_feat_adverts();
+        if (err)
+                goto out4;
 
         err = ext4_init_mballoc();
         if (err)
@@ -4838,12 +4861,14 @@ out1:
 out2:
         ext4_exit_mballoc();
 out3:
-        kfree(ext4_feat);
+        ext4_exit_feat_adverts();
+out4:
         remove_proc_entry("fs/ext4", NULL);
+out5:
         kset_unregister(ext4_kset);
-out4:
+out6:
         ext4_exit_system_zone();
-out5:
+out7:
         ext4_exit_pageio();
         return err;
 }
@@ -4857,6 +4882,7 @@ static void __exit ext4_exit_fs(void)
         destroy_inodecache();
         ext4_exit_xattr();
         ext4_exit_mballoc();
+        ext4_exit_feat_adverts();
         remove_proc_entry("fs/ext4", NULL);
         kset_unregister(ext4_kset);
         ext4_exit_system_zone();
diff --git a/fs/fcntl.c b/fs/fcntl.c
index ecc8b3954ed6..cb1026181bdc 100644
--- a/fs/fcntl.c
+++ b/fs/fcntl.c
@@ -815,7 +815,7 @@ static int __init fcntl_init(void)
                 __O_SYNC        | O_DSYNC       | FASYNC        |
                 O_DIRECT        | O_LARGEFILE   | O_DIRECTORY   |
                 O_NOFOLLOW      | O_NOATIME     | O_CLOEXEC     |
-                FMODE_EXEC
+                __FMODE_EXEC
                 ));
 
         fasync_cache = kmem_cache_create("fasync_cache",
diff --git a/fs/file_table.c b/fs/file_table.c
index c3e89adf53c0..eb36b6b17e26 100644
--- a/fs/file_table.c
+++ b/fs/file_table.c
@@ -125,13 +125,13 @@ struct file *get_empty_filp(void)
                 goto fail;
 
         percpu_counter_inc(&nr_files);
+        f->f_cred = get_cred(cred);
         if (security_file_alloc(f))
                 goto fail_sec;
 
         INIT_LIST_HEAD(&f->f_u.fu_list);
         atomic_long_set(&f->f_count, 1);
         rwlock_init(&f->f_owner.lock);
-        f->f_cred = get_cred(cred);
         spin_lock_init(&f->f_lock);
         eventpoll_init_file(f);
         /* f->f_version: 0 */
diff --git a/fs/gfs2/glock.c b/fs/gfs2/glock.c
index 08a8beb152e6..7cd9a5a68d59 100644
--- a/fs/gfs2/glock.c
+++ b/fs/gfs2/glock.c
@@ -1779,11 +1779,11 @@ int __init gfs2_glock_init(void)
 #endif
 
         glock_workqueue = alloc_workqueue("glock_workqueue", WQ_MEM_RECLAIM |
-                                          WQ_HIGHPRI | WQ_FREEZEABLE, 0);
+                                          WQ_HIGHPRI | WQ_FREEZABLE, 0);
         if (IS_ERR(glock_workqueue))
                 return PTR_ERR(glock_workqueue);
         gfs2_delete_workqueue = alloc_workqueue("delete_workqueue",
-                                                WQ_MEM_RECLAIM | WQ_FREEZEABLE,
+                                                WQ_MEM_RECLAIM | WQ_FREEZABLE,
                                                 0);
         if (IS_ERR(gfs2_delete_workqueue)) {
                 destroy_workqueue(glock_workqueue);
diff --git a/fs/gfs2/main.c b/fs/gfs2/main.c
index ebef7ab6e17e..85ba027d1c4d 100644
--- a/fs/gfs2/main.c
+++ b/fs/gfs2/main.c
@@ -144,7 +144,7 @@ static int __init init_gfs2_fs(void)
 
         error = -ENOMEM;
         gfs_recovery_wq = alloc_workqueue("gfs_recovery",
-                                          WQ_MEM_RECLAIM | WQ_FREEZEABLE, 0);
+                                          WQ_MEM_RECLAIM | WQ_FREEZABLE, 0);
         if (!gfs_recovery_wq)
                 goto fail_wq;
 
diff --git a/fs/hfsplus/extents.c b/fs/hfsplus/extents.c
index 52a0bcaa7b6d..b1991a2a08e0 100644
--- a/fs/hfsplus/extents.c
+++ b/fs/hfsplus/extents.c
@@ -397,8 +397,8 @@ int hfsplus_file_extend(struct inode *inode)
         u32 start, len, goal;
         int res;
 
-        if (sbi->total_blocks - sbi->free_blocks + 8 >
-                        sbi->alloc_file->i_size * 8) {
+        if (sbi->alloc_file->i_size * 8 <
+            sbi->total_blocks - sbi->free_blocks + 8) {
                 /* extend alloc file */
                 printk(KERN_ERR "hfs: extend alloc file! "
                                 "(%llu,%u,%u)\n",
diff --git a/fs/hfsplus/part_tbl.c b/fs/hfsplus/part_tbl.c
index d66ad113b1cc..40ad88c12c64 100644
--- a/fs/hfsplus/part_tbl.c
+++ b/fs/hfsplus/part_tbl.c
@@ -134,7 +134,7 @@ int hfs_part_find(struct super_block *sb,
         res = hfsplus_submit_bio(sb->s_bdev, *part_start + HFS_PMAP_BLK,
                                  data, READ);
         if (res)
-                return res;
+                goto out;
 
         switch (be16_to_cpu(*((__be16 *)data))) {
         case HFS_OLD_PMAP_MAGIC:
@@ -147,7 +147,7 @@ int hfs_part_find(struct super_block *sb,
                 res = -ENOENT;
                 break;
         }
-
+out:
         kfree(data);
         return res;
 }
diff --git a/fs/hfsplus/super.c b/fs/hfsplus/super.c
index 9a3b4795f43c..b49b55584c84 100644
--- a/fs/hfsplus/super.c
+++ b/fs/hfsplus/super.c
@@ -338,20 +338,22 @@ static int hfsplus_fill_super(struct super_block *sb, void *data, int silent)
         struct inode *root, *inode;
         struct qstr str;
         struct nls_table *nls = NULL;
-        int err = -EINVAL;
+        int err;
 
+        err = -EINVAL;
         sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
         if (!sbi)
-                return -ENOMEM;
+                goto out;
 
         sb->s_fs_info = sbi;
         mutex_init(&sbi->alloc_mutex);
         mutex_init(&sbi->vh_mutex);
         hfsplus_fill_defaults(sbi);
+
+        err = -EINVAL;
         if (!hfsplus_parse_options(data, sbi)) {
                 printk(KERN_ERR "hfs: unable to parse mount options\n");
-                err = -EINVAL;
-                goto cleanup;
+                goto out_unload_nls;
         }
 
         /* temporarily use utf8 to correctly find the hidden dir below */
@@ -359,16 +361,14 @@ static int hfsplus_fill_super(struct super_block *sb, void *data, int silent)
         sbi->nls = load_nls("utf8");
         if (!sbi->nls) {
                 printk(KERN_ERR "hfs: unable to load nls for utf8\n");
-                err = -EINVAL;
-                goto cleanup;
+                goto out_unload_nls;
         }
 
         /* Grab the volume header */
         if (hfsplus_read_wrapper(sb)) {
                 if (!silent)
                         printk(KERN_WARNING "hfs: unable to find HFS+ superblock\n");
-                err = -EINVAL;
-                goto cleanup;
+                goto out_unload_nls;
         }
         vhdr = sbi->s_vhdr;
 
@@ -377,7 +377,7 @@ static int hfsplus_fill_super(struct super_block *sb, void *data, int silent)
         if (be16_to_cpu(vhdr->version) < HFSPLUS_MIN_VERSION ||
             be16_to_cpu(vhdr->version) > HFSPLUS_CURRENT_VERSION) {
                 printk(KERN_ERR "hfs: wrong filesystem version\n");
-                goto cleanup;
+                goto out_free_vhdr;
         }
         sbi->total_blocks = be32_to_cpu(vhdr->total_blocks);
         sbi->free_blocks = be32_to_cpu(vhdr->free_blocks);
@@ -421,19 +421,19 @@ static int hfsplus_fill_super(struct super_block *sb, void *data, int silent)
         sbi->ext_tree = hfs_btree_open(sb, HFSPLUS_EXT_CNID);
         if (!sbi->ext_tree) {
                 printk(KERN_ERR "hfs: failed to load extents file\n");
-                goto cleanup;
+                goto out_free_vhdr;
         }
         sbi->cat_tree = hfs_btree_open(sb, HFSPLUS_CAT_CNID);
         if (!sbi->cat_tree) {
                 printk(KERN_ERR "hfs: failed to load catalog file\n");
-                goto cleanup;
+                goto out_close_ext_tree;
         }
 
         inode = hfsplus_iget(sb, HFSPLUS_ALLOC_CNID);
         if (IS_ERR(inode)) {
                 printk(KERN_ERR "hfs: failed to load allocation file\n");
                 err = PTR_ERR(inode);
-                goto cleanup;
+                goto out_close_cat_tree;
         }
         sbi->alloc_file = inode;
 
@@ -442,14 +442,7 @@ static int hfsplus_fill_super(struct super_block *sb, void *data, int silent)
         if (IS_ERR(root)) {
                 printk(KERN_ERR "hfs: failed to load root directory\n");
                 err = PTR_ERR(root);
-                goto cleanup;
-        }
-        sb->s_d_op = &hfsplus_dentry_operations;
-        sb->s_root = d_alloc_root(root);
-        if (!sb->s_root) {
-                iput(root);
-                err = -ENOMEM;
-                goto cleanup;
+                goto out_put_alloc_file;
         }
 
         str.len = sizeof(HFSP_HIDDENDIR_NAME) - 1;
@@ -459,46 +452,69 @@ static int hfsplus_fill_super(struct super_block *sb, void *data, int silent)
         if (!hfs_brec_read(&fd, &entry, sizeof(entry))) {
                 hfs_find_exit(&fd);
                 if (entry.type != cpu_to_be16(HFSPLUS_FOLDER))
-                        goto cleanup;
+                        goto out_put_root;
                 inode = hfsplus_iget(sb, be32_to_cpu(entry.folder.id));
                 if (IS_ERR(inode)) {
                         err = PTR_ERR(inode);
-                        goto cleanup;
+                        goto out_put_root;
                 }
                 sbi->hidden_dir = inode;
         } else
                 hfs_find_exit(&fd);
 
-        if (sb->s_flags & MS_RDONLY)
-                goto out;
+        if (!(sb->s_flags & MS_RDONLY)) {
+                /*
+                 * H+LX == hfsplusutils, H+Lx == this driver, H+lx is unused
+                 * all three are registered with Apple for our use
+                 */
+                vhdr->last_mount_vers = cpu_to_be32(HFSP_MOUNT_VERSION);
+                vhdr->modify_date = hfsp_now2mt();
+                be32_add_cpu(&vhdr->write_count, 1);
+                vhdr->attributes &= cpu_to_be32(~HFSPLUS_VOL_UNMNT);
+                vhdr->attributes |= cpu_to_be32(HFSPLUS_VOL_INCNSTNT);
+                hfsplus_sync_fs(sb, 1);
 
-        /* H+LX == hfsplusutils, H+Lx == this driver, H+lx is unused
-         * all three are registered with Apple for our use
-         */
-        vhdr->last_mount_vers = cpu_to_be32(HFSP_MOUNT_VERSION);
-        vhdr->modify_date = hfsp_now2mt();
-        be32_add_cpu(&vhdr->write_count, 1);
-        vhdr->attributes &= cpu_to_be32(~HFSPLUS_VOL_UNMNT);
-        vhdr->attributes |= cpu_to_be32(HFSPLUS_VOL_INCNSTNT);
-        hfsplus_sync_fs(sb, 1);
-
-        if (!sbi->hidden_dir) {
-                mutex_lock(&sbi->vh_mutex);
-                sbi->hidden_dir = hfsplus_new_inode(sb, S_IFDIR);
-                hfsplus_create_cat(sbi->hidden_dir->i_ino, sb->s_root->d_inode,
-                                   &str, sbi->hidden_dir);
-                mutex_unlock(&sbi->vh_mutex);
-
-                hfsplus_mark_inode_dirty(sbi->hidden_dir, HFSPLUS_I_CAT_DIRTY);
+                if (!sbi->hidden_dir) {
+                        mutex_lock(&sbi->vh_mutex);
+                        sbi->hidden_dir = hfsplus_new_inode(sb, S_IFDIR);
+                        hfsplus_create_cat(sbi->hidden_dir->i_ino, root, &str,
+                                           sbi->hidden_dir);
+                        mutex_unlock(&sbi->vh_mutex);
+
+                        hfsplus_mark_inode_dirty(sbi->hidden_dir,
+                                                 HFSPLUS_I_CAT_DIRTY);
+                }
         }
-out:
+
+        sb->s_d_op = &hfsplus_dentry_operations;
+        sb->s_root = d_alloc_root(root);
+        if (!sb->s_root) {
+                err = -ENOMEM;
+                goto out_put_hidden_dir;
+        }
+
         unload_nls(sbi->nls);
         sbi->nls = nls;
         return 0;
 
-cleanup:
-        hfsplus_put_super(sb);
+out_put_hidden_dir:
+        iput(sbi->hidden_dir);
+out_put_root:
+        iput(sbi->alloc_file);
+out_put_alloc_file:
+        iput(sbi->alloc_file);
+out_close_cat_tree:
+        hfs_btree_close(sbi->cat_tree);
+out_close_ext_tree:
+        hfs_btree_close(sbi->ext_tree);
+out_free_vhdr:
+        kfree(sbi->s_vhdr);
+        kfree(sbi->s_backup_vhdr);
+out_unload_nls:
+        unload_nls(sbi->nls);
         unload_nls(nls);
+        kfree(sbi);
+out:
         return err;
 }
 
diff --git a/fs/hfsplus/wrapper.c b/fs/hfsplus/wrapper.c
index 196231794f64..3031d81f5f0f 100644
--- a/fs/hfsplus/wrapper.c
+++ b/fs/hfsplus/wrapper.c
@@ -167,7 +167,7 @@ reread:
                 break;
         case cpu_to_be16(HFSP_WRAP_MAGIC):
                 if (!hfsplus_read_mdb(sbi->s_vhdr, &wd))
-                        goto out;
+                        goto out_free_backup_vhdr;
                 wd.ablk_size >>= HFSPLUS_SECTOR_SHIFT;
                 part_start += wd.ablk_start + wd.embed_start * wd.ablk_size;
                 part_size = wd.embed_count * wd.ablk_size;
@@ -179,7 +179,7 @@ reread:
                  * (should do this only for cdrom/loop though)
                  */
                 if (hfs_part_find(sb, &part_start, &part_size))
-                        goto out;
+                        goto out_free_backup_vhdr;
                 goto reread;
         }
 
diff --git a/fs/ioctl.c b/fs/ioctl.c
index a59635e295fa..1eebeb72b202 100644
--- a/fs/ioctl.c
+++ b/fs/ioctl.c
@@ -273,6 +273,13 @@ int __generic_block_fiemap(struct inode *inode,
                 len = isize;
         }
 
+        /*
+         * Some filesystems can't deal with being asked to map less than
+         * blocksize, so make sure our len is at least block length.
+         */
+        if (logical_to_blk(inode, len) == 0)
+                len = blk_to_logical(inode, 1);
+
         start_blk = logical_to_blk(inode, start);
         last_blk = logical_to_blk(inode, start + len - 1);
 
diff --git a/fs/jbd2/journal.c b/fs/jbd2/journal.c
index 9e4686900f18..97e73469b2c4 100644
--- a/fs/jbd2/journal.c
+++ b/fs/jbd2/journal.c
@@ -473,7 +473,8 @@ int __jbd2_log_space_left(journal_t *journal)
 }
 
 /*
- * Called under j_state_lock.  Returns true if a transaction commit was started.
+ * Called with j_state_lock locked for writing.
+ * Returns true if a transaction commit was started.
  */
 int __jbd2_log_start_commit(journal_t *journal, tid_t target)
 {
@@ -520,11 +521,13 @@ int jbd2_journal_force_commit_nested(journal_t *journal)
 {
         transaction_t *transaction = NULL;
         tid_t tid;
+        int need_to_start = 0;
 
         read_lock(&journal->j_state_lock);
         if (journal->j_running_transaction && !current->journal_info) {
                 transaction = journal->j_running_transaction;
-                __jbd2_log_start_commit(journal, transaction->t_tid);
+                if (!tid_geq(journal->j_commit_request, transaction->t_tid))
+                        need_to_start = 1;
         } else if (journal->j_committing_transaction)
                 transaction = journal->j_committing_transaction;
 
@@ -535,6 +538,8 @@ int jbd2_journal_force_commit_nested(journal_t *journal)
 
         tid = transaction->t_tid;
         read_unlock(&journal->j_state_lock);
+        if (need_to_start)
+                jbd2_log_start_commit(journal, tid);
         jbd2_log_wait_commit(journal, tid);
         return 1;
 }
diff --git a/fs/jbd2/transaction.c b/fs/jbd2/transaction.c
index faad2bd787c7..1d1191050f99 100644
--- a/fs/jbd2/transaction.c
+++ b/fs/jbd2/transaction.c
@@ -117,10 +117,10 @@ static inline void update_t_max_wait(transaction_t *transaction)
 static int start_this_handle(journal_t *journal, handle_t *handle,
                              int gfp_mask)
 {
-        transaction_t *transaction;
-        int needed;
-        int nblocks = handle->h_buffer_credits;
-        transaction_t *new_transaction = NULL;
+        transaction_t   *transaction, *new_transaction = NULL;
+        tid_t           tid;
+        int             needed, need_to_start;
+        int             nblocks = handle->h_buffer_credits;
 
         if (nblocks > journal->j_max_transaction_buffers) {
                 printk(KERN_ERR "JBD: %s wants too many credits (%d > %d)\n",
@@ -222,8 +222,11 @@ repeat:
                 atomic_sub(nblocks, &transaction->t_outstanding_credits);
                 prepare_to_wait(&journal->j_wait_transaction_locked, &wait,
                                 TASK_UNINTERRUPTIBLE);
-                __jbd2_log_start_commit(journal, transaction->t_tid);
+                tid = transaction->t_tid;
+                need_to_start = !tid_geq(journal->j_commit_request, tid);
                 read_unlock(&journal->j_state_lock);
+                if (need_to_start)
+                        jbd2_log_start_commit(journal, tid);
                 schedule();
                 finish_wait(&journal->j_wait_transaction_locked, &wait);
                 goto repeat;
@@ -442,7 +445,8 @@ int jbd2__journal_restart(handle_t *handle, int nblocks, int gfp_mask)
 {
         transaction_t *transaction = handle->h_transaction;
         journal_t *journal = transaction->t_journal;
-        int ret;
+        tid_t           tid;
+        int             need_to_start, ret;
 
         /* If we've had an abort of any type, don't even think about
          * actually doing the restart! */
@@ -465,8 +469,11 @@ int jbd2__journal_restart(handle_t *handle, int nblocks, int gfp_mask)
         spin_unlock(&transaction->t_handle_lock);
 
         jbd_debug(2, "restarting handle %p\n", handle);
-        __jbd2_log_start_commit(journal, transaction->t_tid);
+        tid = transaction->t_tid;
+        need_to_start = !tid_geq(journal->j_commit_request, tid);
         read_unlock(&journal->j_state_lock);
+        if (need_to_start)
+                jbd2_log_start_commit(journal, tid);
 
         lock_map_release(&handle->h_lockdep_map);
         handle->h_buffer_credits = nblocks;
diff --git a/fs/namei.c b/fs/namei.c
index 7d77f24d32a9..0087cf9c2c6b 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -455,14 +455,6 @@ static int nameidata_dentry_drop_rcu(struct nameidata *nd, struct dentry *dentry
         struct fs_struct *fs = current->fs;
         struct dentry *parent = nd->path.dentry;
 
-        /*
-         * It can be possible to revalidate the dentry that we started
-         * the path walk with. force_reval_path may also revalidate the
-         * dentry already committed to the nameidata.
-         */
-        if (unlikely(parent == dentry))
-                return nameidata_drop_rcu(nd);
-
         BUG_ON(!(nd->flags & LOOKUP_RCU));
         if (nd->root.mnt) {
                 spin_lock(&fs->lock);
@@ -561,39 +553,25 @@ static inline int nameidata_drop_rcu_last_maybe(struct nameidata *nd)
  */
 void release_open_intent(struct nameidata *nd)
 {
-        if (nd->intent.open.file->f_path.dentry == NULL)
-                put_filp(nd->intent.open.file);
-        else
-                fput(nd->intent.open.file);
-}
-
-/*
- * Call d_revalidate and handle filesystems that request rcu-walk
- * to be dropped. This may be called and return in rcu-walk mode,
- * regardless of success or error. If -ECHILD is returned, the caller
- * must return -ECHILD back up the path walk stack so path walk may
- * be restarted in ref-walk mode.
- */
-static int d_revalidate(struct dentry *dentry, struct nameidata *nd)
-{
-        int status;
+        struct file *file = nd->intent.open.file;
 
-        status = dentry->d_op->d_revalidate(dentry, nd);
-        if (status == -ECHILD) {
-                if (nameidata_dentry_drop_rcu(nd, dentry))
-                        return status;
-                status = dentry->d_op->d_revalidate(dentry, nd);
+        if (file && !IS_ERR(file)) {
+                if (file->f_path.dentry == NULL)
+                        put_filp(file);
+                else
+                        fput(file);
         }
+}
 
-        return status;
+static inline int d_revalidate(struct dentry *dentry, struct nameidata *nd)
+{
+        return dentry->d_op->d_revalidate(dentry, nd);
 }
 
-static inline struct dentry *
+static struct dentry *
 do_revalidate(struct dentry *dentry, struct nameidata *nd)
 {
-        int status;
-
-        status = d_revalidate(dentry, nd);
+        int status = d_revalidate(dentry, nd);
         if (unlikely(status <= 0)) {
                 /*
                  * The dentry failed validation.
@@ -602,24 +580,39 @@ do_revalidate(struct dentry *dentry, struct nameidata *nd)
                  * to return a fail status.
                  */
                 if (status < 0) {
-                        /* If we're in rcu-walk, we don't have a ref */
-                        if (!(nd->flags & LOOKUP_RCU))
-                                dput(dentry);
+                        dput(dentry);
                         dentry = ERR_PTR(status);
-
-                } else {
-                        /* Don't d_invalidate in rcu-walk mode */
-                        if (nameidata_dentry_drop_rcu_maybe(nd, dentry))
-                                return ERR_PTR(-ECHILD);
-                        if (!d_invalidate(dentry)) {
-                                dput(dentry);
-                                dentry = NULL;
-                        }
+                } else if (!d_invalidate(dentry)) {
+                        dput(dentry);
+                        dentry = NULL;
                 }
         }
         return dentry;
 }
 
+static inline struct dentry *
+do_revalidate_rcu(struct dentry *dentry, struct nameidata *nd)
+{
+        int status = d_revalidate(dentry, nd);
+        if (likely(status > 0))
+                return dentry;
+        if (status == -ECHILD) {
+                if (nameidata_dentry_drop_rcu(nd, dentry))
+                        return ERR_PTR(-ECHILD);
+                return do_revalidate(dentry, nd);
+        }
+        if (status < 0)
+                return ERR_PTR(status);
+        /* Don't d_invalidate in rcu-walk mode */
+        if (nameidata_dentry_drop_rcu(nd, dentry))
+                return ERR_PTR(-ECHILD);
+        if (!d_invalidate(dentry)) {
+                dput(dentry);
+                dentry = NULL;
+        }
+        return dentry;
+}
+
 static inline int need_reval_dot(struct dentry *dentry)
 {
         if (likely(!(dentry->d_flags & DCACHE_OP_REVALIDATE)))
@@ -664,9 +657,6 @@ force_reval_path(struct path *path, struct nameidata *nd)
                 return 0;
 
         if (!status) {
-                /* Don't d_invalidate in rcu-walk mode */
-                if (nameidata_drop_rcu(nd))
-                        return -ECHILD;
                 d_invalidate(dentry);
                 status = -ESTALE;
         }
@@ -773,6 +763,8 @@ __do_follow_link(const struct path *link, struct nameidata *nd, void **p)
         int error;
         struct dentry *dentry = link->dentry;
 
+        BUG_ON(nd->flags & LOOKUP_RCU);
+
         touch_atime(link->mnt, dentry);
         nd_set_link(nd, NULL);
 
@@ -803,10 +795,16 @@ __do_follow_link(const struct path *link, struct nameidata *nd, void **p)
  * Without that kind of total limit, nasty chains of consecutive
  * symlinks can cause almost arbitrarily long lookups. 
  */
-static inline int do_follow_link(struct path *path, struct nameidata *nd)
+static inline int do_follow_link(struct inode *inode, struct path *path, struct nameidata *nd)
 {
         void *cookie;
         int err = -ELOOP;
+
+        /* We drop rcu-walk here */
+        if (nameidata_dentry_drop_rcu_maybe(nd, path->dentry))
+                return -ECHILD;
+        BUG_ON(inode != path->dentry->d_inode);
+
         if (current->link_count >= MAX_NESTED_LINKS)
                 goto loop;
         if (current->total_link_count >= 40)
@@ -1251,9 +1249,15 @@ static int do_lookup(struct nameidata *nd, struct qstr *name,
                         return -ECHILD;
 
                 nd->seq = seq;
-                if (dentry->d_flags & DCACHE_OP_REVALIDATE)
-                        goto need_revalidate;
-done2:
+                if (unlikely(dentry->d_flags & DCACHE_OP_REVALIDATE)) {
+                        dentry = do_revalidate_rcu(dentry, nd);
+                        if (!dentry)
+                                goto need_lookup;
+                        if (IS_ERR(dentry))
+                                goto fail;
+                        if (!(nd->flags & LOOKUP_RCU))
+                                goto done;
+                }
                 path->mnt = mnt;
                 path->dentry = dentry;
                 if (likely(__follow_mount_rcu(nd, path, inode, false)))
@@ -1266,8 +1270,13 @@ done2:
         if (!dentry)
                 goto need_lookup;
 found:
-        if (dentry->d_flags & DCACHE_OP_REVALIDATE)
-                goto need_revalidate;
+        if (unlikely(dentry->d_flags & DCACHE_OP_REVALIDATE)) {
+                dentry = do_revalidate(dentry, nd);
+                if (!dentry)
+                        goto need_lookup;
+                if (IS_ERR(dentry))
+                        goto fail;
+        }
 done:
         path->mnt = mnt;
         path->dentry = dentry;
@@ -1309,16 +1318,6 @@ need_lookup:
         mutex_unlock(&dir->i_mutex);
         goto found;
 
-need_revalidate:
-        dentry = do_revalidate(dentry, nd);
-        if (!dentry)
-                goto need_lookup;
-        if (IS_ERR(dentry))
-                goto fail;
-        if (nd->flags & LOOKUP_RCU)
-                goto done2;
-        goto done;
-
 fail:
         return PTR_ERR(dentry);
 }
@@ -1415,11 +1414,7 @@ exec_again:
                         goto out_dput;
 
                 if (inode->i_op->follow_link) {
-                        /* We commonly drop rcu-walk here */
-                        if (nameidata_dentry_drop_rcu_maybe(nd, next.dentry))
-                                return -ECHILD;
-                        BUG_ON(inode != next.dentry->d_inode);
-                        err = do_follow_link(&next, nd);
+                        err = do_follow_link(inode, &next, nd);
                         if (err)
                                 goto return_err;
                         nd->inode = nd->path.dentry->d_inode;
@@ -1463,10 +1458,7 @@ last_component:
                         break;
                 if (inode && unlikely(inode->i_op->follow_link) &&
                     (lookup_flags & LOOKUP_FOLLOW)) {
-                        if (nameidata_dentry_drop_rcu_maybe(nd, next.dentry))
-                                return -ECHILD;
-                        BUG_ON(inode != next.dentry->d_inode);
-                        err = do_follow_link(&next, nd);
+                        err = do_follow_link(inode, &next, nd);
                         if (err)
                                 goto return_err;
                         nd->inode = nd->path.dentry->d_inode;
@@ -1500,12 +1492,15 @@ return_reval:
                  * We may need to check the cached dentry for staleness.
                  */
                 if (need_reval_dot(nd->path.dentry)) {
+                        if (nameidata_drop_rcu_last_maybe(nd))
+                                return -ECHILD;
                         /* Note: we do not d_invalidate() */
                         err = d_revalidate(nd->path.dentry, nd);
                         if (!err)
                                 err = -ESTALE;
                         if (err < 0)
                                 break;
+                        return 0;
                 }
 return_base:
                 if (nameidata_drop_rcu_last_maybe(nd))
@@ -2265,8 +2260,6 @@ static struct file *finish_open(struct nameidata *nd,
         return filp;
 
 exit:
-        if (!IS_ERR(nd->intent.open.file))
-                release_open_intent(nd);
         path_put(&nd->path);
         return ERR_PTR(error);
 }
@@ -2389,8 +2382,6 @@ exit_mutex_unlock:
 exit_dput:
         path_put_conditional(path, nd);
 exit:
-        if (!IS_ERR(nd->intent.open.file))
-                release_open_intent(nd);
         path_put(&nd->path);
         return ERR_PTR(error);
 }
@@ -2477,6 +2468,7 @@ struct file *do_filp_open(int dfd, const char *pathname,
         }
         audit_inode(pathname, nd.path.dentry);
         filp = finish_open(&nd, open_flag, acc_mode);
+        release_open_intent(&nd);
         return filp;
 
 creat:
@@ -2553,6 +2545,7 @@ out:
                 path_put(&nd.root);
         if (filp == ERR_PTR(-ESTALE) && !(flags & LOOKUP_REVAL))
                 goto reval;
+        release_open_intent(&nd);
         return filp;
 
 exit_dput:
@@ -2560,8 +2553,6 @@ exit_dput:
 out_path:
         path_put(&nd.path);
 out_filp:
-        if (!IS_ERR(nd.intent.open.file))
-                release_open_intent(&nd);
         filp = ERR_PTR(error);
         goto out;
 }
diff --git a/fs/nfsd/nfs4callback.c b/fs/nfsd/nfs4callback.c
index 3be975e18919..cde36cb0f348 100644
--- a/fs/nfsd/nfs4callback.c
+++ b/fs/nfsd/nfs4callback.c
@@ -484,7 +484,7 @@ static int decode_cb_sequence4res(struct xdr_stream *xdr,
 out:
         return status;
 out_default:
-        return nfs_cb_stat_to_errno(status);
+        return nfs_cb_stat_to_errno(nfserr);
 }
 
 /*
@@ -564,11 +564,9 @@ static int nfs4_xdr_dec_cb_recall(struct rpc_rqst *rqstp,
         if (unlikely(status))
                 goto out;
         if (unlikely(nfserr != NFS4_OK))
-                goto out_default;
+                status = nfs_cb_stat_to_errno(nfserr);
 out:
         return status;
-out_default:
-        return nfs_cb_stat_to_errno(status);
 }
 
 /*
diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index d98d0213285d..54b60bfceb8d 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -230,9 +230,6 @@ alloc_init_deleg(struct nfs4_client *clp, struct nfs4_stateid *stp, struct svc_f
         dp->dl_client = clp;
         get_nfs4_file(fp);
         dp->dl_file = fp;
-        dp->dl_vfs_file = find_readable_file(fp);
-        get_file(dp->dl_vfs_file);
-        dp->dl_flock = NULL;
         dp->dl_type = type;
         dp->dl_stateid.si_boot = boot_time;
         dp->dl_stateid.si_stateownerid = current_delegid++;
@@ -241,8 +238,6 @@ alloc_init_deleg(struct nfs4_client *clp, struct nfs4_stateid *stp, struct svc_f
         fh_copy_shallow(&dp->dl_fh, &current_fh->fh_handle);
         dp->dl_time = 0;
         atomic_set(&dp->dl_count, 1);
-        list_add(&dp->dl_perfile, &fp->fi_delegations);
-        list_add(&dp->dl_perclnt, &clp->cl_delegations);
         INIT_WORK(&dp->dl_recall.cb_work, nfsd4_do_callback_rpc);
         return dp;
 }
@@ -253,36 +248,30 @@ nfs4_put_delegation(struct nfs4_delegation *dp)
         if (atomic_dec_and_test(&dp->dl_count)) {
                 dprintk("NFSD: freeing dp %p\n",dp);
                 put_nfs4_file(dp->dl_file);
-                fput(dp->dl_vfs_file);
                 kmem_cache_free(deleg_slab, dp);
                 num_delegations--;
         }
 }
 
-/* Remove the associated file_lock first, then remove the delegation.
- * lease_modify() is called to remove the FS_LEASE file_lock from
- * the i_flock list, eventually calling nfsd's lock_manager
- * fl_release_callback.
- */
-static void
-nfs4_close_delegation(struct nfs4_delegation *dp)
+static void nfs4_put_deleg_lease(struct nfs4_file *fp)
 {
-        dprintk("NFSD: close_delegation dp %p\n",dp);
-        /* XXX: do we even need this check?: */
-        if (dp->dl_flock)
-                vfs_setlease(dp->dl_vfs_file, F_UNLCK, &dp->dl_flock);
+        if (atomic_dec_and_test(&fp->fi_delegees)) {
+                vfs_setlease(fp->fi_deleg_file, F_UNLCK, &fp->fi_lease);
+                fp->fi_lease = NULL;
+                fp->fi_deleg_file = NULL;
+        }
 }
 
 /* Called under the state lock. */
 static void
 unhash_delegation(struct nfs4_delegation *dp)
 {
-        list_del_init(&dp->dl_perfile);
         list_del_init(&dp->dl_perclnt);
         spin_lock(&recall_lock);
+        list_del_init(&dp->dl_perfile);
         list_del_init(&dp->dl_recall_lru);
         spin_unlock(&recall_lock);
-        nfs4_close_delegation(dp);
+        nfs4_put_deleg_lease(dp->dl_file);
         nfs4_put_delegation(dp);
 }
 
@@ -958,8 +947,6 @@ expire_client(struct nfs4_client *clp)
         spin_lock(&recall_lock);
         while (!list_empty(&clp->cl_delegations)) {
                 dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt);
-                dprintk("NFSD: expire client. dp %p, fp %p\n", dp,
-                                dp->dl_flock);
                 list_del_init(&dp->dl_perclnt);
                 list_move(&dp->dl_recall_lru, &reaplist);
         }
@@ -2078,6 +2065,7 @@ alloc_init_file(struct inode *ino)
                 fp->fi_inode = igrab(ino);
                 fp->fi_id = current_fileid++;
                 fp->fi_had_conflict = false;
+                fp->fi_lease = NULL;
                 memset(fp->fi_fds, 0, sizeof(fp->fi_fds));
                 memset(fp->fi_access, 0, sizeof(fp->fi_access));
                 spin_lock(&recall_lock);
@@ -2329,23 +2317,8 @@ nfs4_file_downgrade(struct nfs4_file *fp, unsigned int share_access)
                 nfs4_file_put_access(fp, O_RDONLY);
 }
 
-/*
- * Spawn a thread to perform a recall on the delegation represented
- * by the lease (file_lock)
- *
- * Called from break_lease() with lock_flocks() held.
- * Note: we assume break_lease will only call this *once* for any given
- * lease.
- */
-static
-void nfsd_break_deleg_cb(struct file_lock *fl)
+static void nfsd_break_one_deleg(struct nfs4_delegation *dp)
 {
-        struct nfs4_delegation *dp = (struct nfs4_delegation *)fl->fl_owner;
-
-        dprintk("NFSD nfsd_break_deleg_cb: dp %p fl %p\n",dp,fl);
-        if (!dp)
-                return;
-
         /* We're assuming the state code never drops its reference
          * without first removing the lease.  Since we're in this lease
          * callback (and since the lease code is serialized by the kernel
@@ -2353,22 +2326,35 @@ void nfsd_break_deleg_cb(struct file_lock *fl)
          * it's safe to take a reference: */
         atomic_inc(&dp->dl_count);
 
-        spin_lock(&recall_lock);
         list_add_tail(&dp->dl_recall_lru, &del_recall_lru);
-        spin_unlock(&recall_lock);
 
         /* only place dl_time is set. protected by lock_flocks*/
         dp->dl_time = get_seconds();
 
+        nfsd4_cb_recall(dp);
+}
+
+/* Called from break_lease() with lock_flocks() held. */
+static void nfsd_break_deleg_cb(struct file_lock *fl)
+{
+        struct nfs4_file *fp = (struct nfs4_file *)fl->fl_owner;
+        struct nfs4_delegation *dp;
+
+        BUG_ON(!fp);
+        /* We assume break_lease is only called once per lease: */
+        BUG_ON(fp->fi_had_conflict);
         /*
          * We don't want the locks code to timeout the lease for us;
-         * we'll remove it ourself if the delegation isn't returned
-         * in time.
+         * we'll remove it ourself if a delegation isn't returned
+         * in time:
          */
         fl->fl_break_time = 0;
 
-        dp->dl_file->fi_had_conflict = true;
-        nfsd4_cb_recall(dp);
+        spin_lock(&recall_lock);
+        fp->fi_had_conflict = true;
+        list_for_each_entry(dp, &fp->fi_delegations, dl_perfile)
+                nfsd_break_one_deleg(dp);
+        spin_unlock(&recall_lock);
 }
 
 static
@@ -2459,13 +2445,15 @@ nfs4_check_delegmode(struct nfs4_delegation *dp, int flags)
 static struct nfs4_delegation *
 find_delegation_file(struct nfs4_file *fp, stateid_t *stid)
 {
-        struct nfs4_delegation *dp;
+        struct nfs4_delegation *dp = NULL;
 
+        spin_lock(&recall_lock);
         list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) {
                 if (dp->dl_stateid.si_stateownerid == stid->si_stateownerid)
-                        return dp;
+                        break;
         }
-        return NULL;
+        spin_unlock(&recall_lock);
+        return dp;
 }
 
 int share_access_to_flags(u32 share_access)
@@ -2641,6 +2629,66 @@ static bool nfsd4_cb_channel_good(struct nfs4_client *clp)
         return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN;
 }
 
+static struct file_lock *nfs4_alloc_init_lease(struct nfs4_delegation *dp, int flag)
+{
+        struct file_lock *fl;
+
+        fl = locks_alloc_lock();
+        if (!fl)
+                return NULL;
+        locks_init_lock(fl);
+        fl->fl_lmops = &nfsd_lease_mng_ops;
+        fl->fl_flags = FL_LEASE;
+        fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK;
+        fl->fl_end = OFFSET_MAX;
+        fl->fl_owner = (fl_owner_t)(dp->dl_file);
+        fl->fl_pid = current->tgid;
+        return fl;
+}
+
+static int nfs4_setlease(struct nfs4_delegation *dp, int flag)
+{
+        struct nfs4_file *fp = dp->dl_file;
+        struct file_lock *fl;
+        int status;
+
+        fl = nfs4_alloc_init_lease(dp, flag);
+        if (!fl)
+                return -ENOMEM;
+        fl->fl_file = find_readable_file(fp);
+        list_add(&dp->dl_perclnt, &dp->dl_client->cl_delegations);
+        status = vfs_setlease(fl->fl_file, fl->fl_type, &fl);
+        if (status) {
+                list_del_init(&dp->dl_perclnt);
+                locks_free_lock(fl);
+                return -ENOMEM;
+        }
+        fp->fi_lease = fl;
+        fp->fi_deleg_file = fl->fl_file;
+        get_file(fp->fi_deleg_file);
+        atomic_set(&fp->fi_delegees, 1);
+        list_add(&dp->dl_perfile, &fp->fi_delegations);
+        return 0;
+}
+
+static int nfs4_set_delegation(struct nfs4_delegation *dp, int flag)
+{
+        struct nfs4_file *fp = dp->dl_file;
+
+        if (!fp->fi_lease)
+                return nfs4_setlease(dp, flag);
+        spin_lock(&recall_lock);
+        if (fp->fi_had_conflict) {
+                spin_unlock(&recall_lock);
+                return -EAGAIN;
+        }
+        atomic_inc(&fp->fi_delegees);
+        list_add(&dp->dl_perfile, &fp->fi_delegations);
+        spin_unlock(&recall_lock);
+        list_add(&dp->dl_perclnt, &dp->dl_client->cl_delegations);
+        return 0;
+}
+
 /*
  * Attempt to hand out a delegation.
  */
@@ -2650,7 +2698,6 @@ nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_sta
         struct nfs4_delegation *dp;
         struct nfs4_stateowner *sop = stp->st_stateowner;
         int cb_up;
-        struct file_lock *fl;
         int status, flag = 0;
 
         cb_up = nfsd4_cb_channel_good(sop->so_client);
@@ -2681,36 +2728,11 @@ nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_sta
         }
 
         dp = alloc_init_deleg(sop->so_client, stp, fh, flag);
-        if (dp == NULL) {
-                flag = NFS4_OPEN_DELEGATE_NONE;
-                goto out;
-        }
-        status = -ENOMEM;
-        fl = locks_alloc_lock();
-        if (!fl)
-                goto out;
-        locks_init_lock(fl);
-        fl->fl_lmops = &nfsd_lease_mng_ops;
-        fl->fl_flags = FL_LEASE;
-        fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK;
-        fl->fl_end = OFFSET_MAX;
-        fl->fl_owner =  (fl_owner_t)dp;
-        fl->fl_file = find_readable_file(stp->st_file);
-        BUG_ON(!fl->fl_file);
-        fl->fl_pid = current->tgid;
-        dp->dl_flock = fl;
-
-        /* vfs_setlease checks to see if delegation should be handed out.
-         * the lock_manager callback fl_change is used
-         */
-        if ((status = vfs_setlease(fl->fl_file, fl->fl_type, &fl))) {
-                dprintk("NFSD: setlease failed [%d], no delegation\n", status);
-                dp->dl_flock = NULL;
-                locks_free_lock(fl);
-                unhash_delegation(dp);
-                flag = NFS4_OPEN_DELEGATE_NONE;
-                goto out;
-        }
+        if (dp == NULL)
+                goto out_no_deleg;
+        status = nfs4_set_delegation(dp, flag);
+        if (status)
+                goto out_free;
 
         memcpy(&open->op_delegate_stateid, &dp->dl_stateid, sizeof(dp->dl_stateid));
 
@@ -2722,6 +2744,12 @@ out:
                         && open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE)
                 dprintk("NFSD: WARNING: refusing delegation reclaim\n");
         open->op_delegate_type = flag;
+        return;
+out_free:
+        nfs4_put_delegation(dp);
+out_no_deleg:
+        flag = NFS4_OPEN_DELEGATE_NONE;
+        goto out;
 }
 
 /*
@@ -2916,8 +2944,6 @@ nfs4_laundromat(void)
                                 test_val = u;
                         break;
                 }
-                dprintk("NFSD: purging unused delegation dp %p, fp %p\n",
-                                    dp, dp->dl_flock);
                 list_move(&dp->dl_recall_lru, &reaplist);
         }
         spin_unlock(&recall_lock);
@@ -3128,7 +3154,7 @@ nfs4_preprocess_stateid_op(struct nfsd4_compound_state *cstate,
                         goto out;
                 renew_client(dp->dl_client);
                 if (filpp) {
-                        *filpp = find_readable_file(dp->dl_file);
+                        *filpp = dp->dl_file->fi_deleg_file;
                         BUG_ON(!*filpp);
                 }
         } else { /* open or lock stateid */
diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c
index 956629b9cdc9..1275b8655070 100644
--- a/fs/nfsd/nfs4xdr.c
+++ b/fs/nfsd/nfs4xdr.c
@@ -317,8 +317,8 @@ nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval,
                 READ_BUF(dummy32);
                 len += (XDR_QUADLEN(dummy32) << 2);
                 READMEM(buf, dummy32);
-                if ((host_err = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid)))
-                        goto out_nfserr;
+                if ((status = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid)))
+                        return status;
                 iattr->ia_valid |= ATTR_UID;
         }
         if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
@@ -328,8 +328,8 @@ nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval,
                 READ_BUF(dummy32);
                 len += (XDR_QUADLEN(dummy32) << 2);
                 READMEM(buf, dummy32);
-                if ((host_err = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid)))
-                        goto out_nfserr;
+                if ((status = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid)))
+                        return status;
                 iattr->ia_valid |= ATTR_GID;
         }
         if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
diff --git a/fs/nfsd/state.h b/fs/nfsd/state.h
index 3074656ba7bf..2d31224b07bf 100644
--- a/fs/nfsd/state.h
+++ b/fs/nfsd/state.h
@@ -83,8 +83,6 @@ struct nfs4_delegation {
         atomic_t                dl_count;       /* ref count */
         struct nfs4_client      *dl_client;
         struct nfs4_file        *dl_file;
-        struct file             *dl_vfs_file;
-        struct file_lock        *dl_flock;
         u32                     dl_type;
         time_t                  dl_time;
 /* For recall: */
@@ -379,6 +377,9 @@ struct nfs4_file {
          */
         atomic_t                fi_readers;
         atomic_t                fi_writers;
+        struct file             *fi_deleg_file;
+        struct file_lock        *fi_lease;
+        atomic_t                fi_delegees;
         struct inode            *fi_inode;
         u32                     fi_id;      /* used with stateowner->so_id 
                                              * for stateid_hashtbl hash */
diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c
index 641117f2188d..da1d9701f8e4 100644
--- a/fs/nfsd/vfs.c
+++ b/fs/nfsd/vfs.c
@@ -808,7 +808,7 @@ nfsd_get_raparms(dev_t dev, ino_t ino)
                 if (ra->p_count == 0)
                         frap = rap;
         }
-        depth = nfsdstats.ra_size*11/10;
+        depth = nfsdstats.ra_size;
         if (!frap) {    
                 spin_unlock(&rab->pb_lock);
                 return NULL;
@@ -1744,6 +1744,13 @@ nfsd_rename(struct svc_rqst *rqstp, struct svc_fh *ffhp, char *fname, int flen,
         host_err = nfsd_break_lease(odentry->d_inode);
         if (host_err)
                 goto out_drop_write;
+        if (ndentry->d_inode) {
+                host_err = nfsd_break_lease(ndentry->d_inode);
+                if (host_err)
+                        goto out_drop_write;
+        }
+        if (host_err)
+                goto out_drop_write;
         host_err = vfs_rename(fdir, odentry, tdir, ndentry);
         if (!host_err) {
                 host_err = commit_metadata(tfhp);
@@ -1812,22 +1819,22 @@ nfsd_unlink(struct svc_rqst *rqstp, struct svc_fh *fhp, int type,
 
         host_err = mnt_want_write(fhp->fh_export->ex_path.mnt);
         if (host_err)
-                goto out_nfserr;
+                goto out_put;
 
         host_err = nfsd_break_lease(rdentry->d_inode);
         if (host_err)
-                goto out_put;
+                goto out_drop_write;
         if (type != S_IFDIR)
                 host_err = vfs_unlink(dirp, rdentry);
         else
                 host_err = vfs_rmdir(dirp, rdentry);
-out_put:
-        dput(rdentry);
-
         if (!host_err)
                 host_err = commit_metadata(fhp);
-
+out_drop_write:
         mnt_drop_write(fhp->fh_export->ex_path.mnt);
+out_put:
+        dput(rdentry);
+
 out_nfserr:
         err = nfserrno(host_err);
 out:
diff --git a/fs/open.c b/fs/open.c
index e52389e1f05b..5a2c6ebc22b5 100644
--- a/fs/open.c
+++ b/fs/open.c
@@ -790,6 +790,8 @@ struct file *nameidata_to_filp(struct nameidata *nd)
 
         /* Pick up the filp from the open intent */
         filp = nd->intent.open.file;
+        nd->intent.open.file = NULL;
+
         /* Has the filesystem initialised the file for us? */
         if (filp->f_path.dentry == NULL) {
                 path_get(&nd->path);
diff --git a/fs/partitions/mac.c b/fs/partitions/mac.c
index 68d6a216ee79..11f688bd76c5 100644
--- a/fs/partitions/mac.c
+++ b/fs/partitions/mac.c
@@ -29,10 +29,9 @@ static inline void mac_fix_string(char *stg, int len)
 
 int mac_partition(struct parsed_partitions *state)
 {
-        int slot = 1;
         Sector sect;
         unsigned char *data;
-        int blk, blocks_in_map;
+        int slot, blocks_in_map;
         unsigned secsize;
 #ifdef CONFIG_PPC_PMAC
         int found_root = 0;
@@ -59,10 +58,14 @@ int mac_partition(struct parsed_partitions *state)
                 put_dev_sector(sect);
                 return 0;               /* not a MacOS disk */
         }
-        strlcat(state->pp_buf, " [mac]", PAGE_SIZE);
         blocks_in_map = be32_to_cpu(part->map_count);
-        for (blk = 1; blk <= blocks_in_map; ++blk) {
-                int pos = blk * secsize;
+        if (blocks_in_map < 0 || blocks_in_map >= DISK_MAX_PARTS) {
+                put_dev_sector(sect);
+                return 0;
+        }
+        strlcat(state->pp_buf, " [mac]", PAGE_SIZE);
+        for (slot = 1; slot <= blocks_in_map; ++slot) {
+                int pos = slot * secsize;
                 put_dev_sector(sect);
                 data = read_part_sector(state, pos/512, &sect);
                 if (!data)
@@ -113,13 +116,11 @@ int mac_partition(struct parsed_partitions *state)
                         }
 
                         if (goodness > found_root_goodness) {
-                                found_root = blk;
+                                found_root = slot;
                                 found_root_goodness = goodness;
                         }
                 }
 #endif /* CONFIG_PPC_PMAC */
-
-                ++slot;
         }
 #ifdef CONFIG_PPC_PMAC
         if (found_root_goodness)
diff --git a/fs/proc/array.c b/fs/proc/array.c
index df2b703b9d0f..7c99c1cf7e5c 100644
--- a/fs/proc/array.c
+++ b/fs/proc/array.c
@@ -353,9 +353,6 @@ int proc_pid_status(struct seq_file *m, struct pid_namespace *ns,
         task_cap(m, task);
         task_cpus_allowed(m, task);
         cpuset_task_status_allowed(m, task);
-#if defined(CONFIG_S390)
-        task_show_regs(m, task);
-#endif
         task_context_switch_counts(m, task);
         return 0;
 }
diff --git a/fs/super.c b/fs/super.c
index 74e149efed81..7e9dd4cc2c01 100644
--- a/fs/super.c
+++ b/fs/super.c
@@ -177,6 +177,11 @@ void deactivate_locked_super(struct super_block *s)
         struct file_system_type *fs = s->s_type;
         if (atomic_dec_and_test(&s->s_active)) {
                 fs->kill_sb(s);
+                /*
+                 * We need to call rcu_barrier so all the delayed rcu free
+                 * inodes are flushed before we release the fs module.
+                 */
+                rcu_barrier();
                 put_filesystem(fs);
                 put_super(s);
         } else {