Merge tag 'usb-4.1-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb

[cascardo/linux.git] / fs / btrfs / free-space-cache.c

diff --git a/fs/btrfs/free-space-cache.c b/fs/btrfs/free-space-cache.c
index 81fa75a..9dbe5b5 100644 (file)
--- a/fs/btrfs/free-space-cache.c
+++ b/fs/btrfs/free-space-cache.c
@@ -86,7 +86,7 @@ static struct inode *__lookup_free_space_inode(struct btrfs_root *root,
 
        mapping_set_gfp_mask(inode->i_mapping,
                        mapping_gfp_mask(inode->i_mapping) &
-                       ~(GFP_NOFS & ~__GFP_HIGHMEM));
+                       ~(__GFP_FS | __GFP_HIGHMEM));
 
        return inode;
 }
@@ -1218,7 +1218,7 @@ out:
  *
  * This function writes out a free space cache struct to disk for quick recovery
  * on mount.  This will return 0 if it was successfull in writing the cache out,
- * and -1 if it was not.
+ * or an errno if it was not.
  */
 static int __btrfs_write_out_cache(struct btrfs_root *root, struct inode *inode,
                                   struct btrfs_free_space_ctl *ctl,
@@ -1235,12 +1235,12 @@ static int __btrfs_write_out_cache(struct btrfs_root *root, struct inode *inode,
        int must_iput = 0;
 
        if (!i_size_read(inode))
-               return -1;
+               return -EIO;
 
        WARN_ON(io_ctl->pages);
        ret = io_ctl_init(io_ctl, inode, root, 1);
        if (ret)
-               return -1;
+               return ret;
 
        if (block_group && (block_group->flags & BTRFS_BLOCK_GROUP_DATA)) {
                down_write(&block_group->data_rwsem);
@@ -1258,7 +1258,9 @@ static int __btrfs_write_out_cache(struct btrfs_root *root, struct inode *inode,
        }
 
        /* Lock all pages first so we can lock the extent safely. */
-       io_ctl_prepare_pages(io_ctl, inode, 0);
+       ret = io_ctl_prepare_pages(io_ctl, inode, 0);
+       if (ret)
+               goto out;
 
        lock_extent_bits(&BTRFS_I(inode)->io_tree, 0, i_size_read(inode) - 1,
                         0, &cached_state);
@@ -3464,6 +3466,7 @@ int btrfs_write_out_ino_cache(struct btrfs_root *root,
        struct btrfs_free_space_ctl *ctl = root->free_ino_ctl;
        int ret;
        struct btrfs_io_ctl io_ctl;
+       bool release_metadata = true;
 
        if (!btrfs_test_opt(root, INODE_MAP_CACHE))
                return 0;
@@ -3471,11 +3474,20 @@ int btrfs_write_out_ino_cache(struct btrfs_root *root,
        memset(&io_ctl, 0, sizeof(io_ctl));
        ret = __btrfs_write_out_cache(root, inode, ctl, NULL, &io_ctl,
                                      trans, path, 0);
-       if (!ret)
+       if (!ret) {
+               /*
+                * At this point writepages() didn't error out, so our metadata
+                * reservation is released when the writeback finishes, at
+                * inode.c:btrfs_finish_ordered_io(), regardless of it finishing
+                * with or without an error.
+                */
+               release_metadata = false;
                ret = btrfs_wait_cache_io(root, trans, NULL, &io_ctl, path, 0);
+       }
 
        if (ret) {
-               btrfs_delalloc_release_metadata(inode, inode->i_size);
+               if (release_metadata)
+                       btrfs_delalloc_release_metadata(inode, inode->i_size);
 #ifdef DEBUG
                btrfs_err(root->fs_info,
                        "failed to write free ino cache for root %llu",