diff options
| author | Chris Mason <chris.mason@oracle.com> | 2007-03-13 16:47:54 -0400 |
|---|---|---|
| committer | David Woodhouse <dwmw2@hera.kernel.org> | 2007-03-13 16:47:54 -0400 |
| commit | 3768f3689fc76ecea17414936dff7a02746a4355 (patch) | |
| tree | 0494b12e3ba0be0a25f122922e205bc91d88957b /fs/btrfs/extent-tree.c | |
| parent | eaee50e881b88766d9a781c54c4142456cf5e527 (diff) | |
| download | talos-op-linux-3768f3689fc76ecea17414936dff7a02746a4355.tar.gz talos-op-linux-3768f3689fc76ecea17414936dff7a02746a4355.zip | |
Btrfs: Change the super to point to a tree of trees to enable persistent snapshots
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Diffstat (limited to 'fs/btrfs/extent-tree.c')
| -rw-r--r-- | fs/btrfs/extent-tree.c | 15 |
1 files changed, 7 insertions, 8 deletions
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c index a6969538bca2..21f39b404697 100644 --- a/fs/btrfs/extent-tree.c +++ b/fs/btrfs/extent-tree.c @@ -82,7 +82,7 @@ int btrfs_inc_ref(struct btrfs_root *root, struct btrfs_buffer *buf) u64 blocknr; int i; - if (root == root->extent_root) + if (!root->ref_cows) return 0; if (btrfs_is_leaf(&buf->node)) return 0; @@ -96,23 +96,22 @@ int btrfs_inc_ref(struct btrfs_root *root, struct btrfs_buffer *buf) int btrfs_finish_extent_commit(struct btrfs_root *root) { - struct btrfs_root *extent_root = root->extent_root; unsigned long gang[8]; int ret; int i; while(1) { - ret = radix_tree_gang_lookup(&extent_root->pinned_radix, + ret = radix_tree_gang_lookup(&root->pinned_radix, (void **)gang, 0, ARRAY_SIZE(gang)); if (!ret) break; for (i = 0; i < ret; i++) { - radix_tree_delete(&extent_root->pinned_radix, gang[i]); + radix_tree_delete(&root->pinned_radix, gang[i]); } } - extent_root->last_insert.objectid = 0; - extent_root->last_insert.offset = 0; + root->last_insert.objectid = 0; + root->last_insert.offset = 0; return 0; } @@ -173,7 +172,7 @@ static int __free_extent(struct btrfs_root *root, u64 blocknr, u64 num_blocks) refs = btrfs_extent_refs(ei) - 1; btrfs_set_extent_refs(ei, refs); if (refs == 0) { - if (root == extent_root) { + if (!root->ref_cows) { int err; radix_tree_preload(GFP_KERNEL); err = radix_tree_insert(&extent_root->pinned_radix, @@ -513,7 +512,7 @@ static int walk_up_tree(struct btrfs_root *root, struct btrfs_path *path, */ int btrfs_drop_snapshot(struct btrfs_root *root, struct btrfs_buffer *snap) { - int ret = 0;; + int ret = 0; int wret; int level; struct btrfs_path path; |
