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authorLinus Torvalds <torvalds@linux-foundation.org>2015-04-26 17:40:30 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2015-04-26 17:40:30 -0700
commitf583381f506dc53b9d3e98cf9d6577323eb3fcd2 (patch)
tree5a53895acd1d3c6adab886910399780dd95d65e3
parent59953fba87e5e535657403cc6439d24187929559 (diff)
parenta3bdccc4e683f0ac69230707ed3fa20e7cf73a79 (diff)
downloadlinux-stericsson-f583381f506dc53b9d3e98cf9d6577323eb3fcd2.tar.gz
Merge branch 'for-linus-4.1' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs
Pull btrfs fixes from Chris Mason: "Filipe hit two problems in my block group cache patches. We finalized the fixes last week and ran through more tests" * 'for-linus-4.1' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs: Btrfs: prevent list corruption during free space cache processing Btrfs: fix inode cache writeout
-rw-r--r--fs/btrfs/free-space-cache.c42
1 files changed, 25 insertions, 17 deletions
diff --git a/fs/btrfs/free-space-cache.c b/fs/btrfs/free-space-cache.c
index 253cb74b0e27..81fa75a8e1f3 100644
--- a/fs/btrfs/free-space-cache.c
+++ b/fs/btrfs/free-space-cache.c
@@ -1119,10 +1119,7 @@ static int flush_dirty_cache(struct inode *inode)
}
static void noinline_for_stack
-cleanup_write_cache_enospc(struct inode *inode,
- struct btrfs_io_ctl *io_ctl,
- struct extent_state **cached_state,
- struct list_head *bitmap_list)
+cleanup_bitmap_list(struct list_head *bitmap_list)
{
struct list_head *pos, *n;
@@ -1131,6 +1128,14 @@ cleanup_write_cache_enospc(struct inode *inode,
list_entry(pos, struct btrfs_free_space, list);
list_del_init(&entry->list);
}
+}
+
+static void noinline_for_stack
+cleanup_write_cache_enospc(struct inode *inode,
+ struct btrfs_io_ctl *io_ctl,
+ struct extent_state **cached_state,
+ struct list_head *bitmap_list)
+{
io_ctl_drop_pages(io_ctl);
unlock_extent_cached(&BTRFS_I(inode)->io_tree, 0,
i_size_read(inode) - 1, cached_state,
@@ -1149,7 +1154,8 @@ int btrfs_wait_cache_io(struct btrfs_root *root,
if (!inode)
return 0;
- root = root->fs_info->tree_root;
+ if (block_group)
+ root = root->fs_info->tree_root;
/* Flush the dirty pages in the cache file. */
ret = flush_dirty_cache(inode);
@@ -1265,11 +1271,8 @@ static int __btrfs_write_out_cache(struct btrfs_root *root, struct inode *inode,
ret = write_cache_extent_entries(io_ctl, ctl,
block_group, &entries, &bitmaps,
&bitmap_list);
- spin_unlock(&ctl->tree_lock);
- if (ret) {
- mutex_unlock(&ctl->cache_writeout_mutex);
- goto out_nospc;
- }
+ if (ret)
+ goto out_nospc_locked;
/*
* Some spaces that are freed in the current transaction are pinned,
@@ -1280,17 +1283,14 @@ static int __btrfs_write_out_cache(struct btrfs_root *root, struct inode *inode,
* the dirty list and redo it. No locking needed
*/
ret = write_pinned_extent_entries(root, block_group, io_ctl, &entries);
- if (ret) {
- mutex_unlock(&ctl->cache_writeout_mutex);
- goto out_nospc;
- }
+ if (ret)
+ goto out_nospc_locked;
/*
* At last, we write out all the bitmaps and keep cache_writeout_mutex
* locked while doing it because a concurrent trim can be manipulating
* or freeing the bitmap.
*/
- spin_lock(&ctl->tree_lock);
ret = write_bitmap_entries(io_ctl, &bitmap_list);
spin_unlock(&ctl->tree_lock);
mutex_unlock(&ctl->cache_writeout_mutex);
@@ -1343,6 +1343,11 @@ out:
iput(inode);
return ret;
+out_nospc_locked:
+ cleanup_bitmap_list(&bitmap_list);
+ spin_unlock(&ctl->tree_lock);
+ mutex_unlock(&ctl->cache_writeout_mutex);
+
out_nospc:
cleanup_write_cache_enospc(inode, io_ctl, &cached_state, &bitmap_list);
@@ -3463,9 +3468,12 @@ int btrfs_write_out_ino_cache(struct btrfs_root *root,
if (!btrfs_test_opt(root, INODE_MAP_CACHE))
return 0;
+ memset(&io_ctl, 0, sizeof(io_ctl));
ret = __btrfs_write_out_cache(root, inode, ctl, NULL, &io_ctl,
- trans, path, 0) ||
- btrfs_wait_cache_io(root, trans, NULL, &io_ctl, path, 0);
+ trans, path, 0);
+ if (!ret)
+ ret = btrfs_wait_cache_io(root, trans, NULL, &io_ctl, path, 0);
+
if (ret) {
btrfs_delalloc_release_metadata(inode, inode->i_size);
#ifdef DEBUG