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authorOmar Sandoval <osandov@fb.com>2015-09-29 20:51:44 -0700
committerDavid Sterba <dsterba@suse.com>2016-01-12 15:02:54 +0100
commitd8c537e71f3dce8a8d03dddfcbcac71ef2e2cdc4 (patch)
treead395afec2a95863f315da036de3d73d5a603688 /disk-io.c
parent32c063ccb73dc11e880a575f30e921ca64b8c520 (diff)
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btrfs-progs: add basic awareness of the free space tree
To start, let's tell btrfs-progs to read the free space root and how to print the on-disk format of the free space tree. However, we're not adding the FREE_SPACE_TREE read-only compat bit to the set of supported bits because progs doesn't know how to keep the free space tree consistent. Signed-off-by: Omar Sandoval <osandov@fb.com> Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'disk-io.c')
-rw-r--r--disk-io.c16
1 files changed, 15 insertions, 1 deletions
diff --git a/disk-io.c b/disk-io.c
index 83bdb27..bd0444b 100644
--- a/disk-io.c
+++ b/disk-io.c
@@ -811,6 +811,7 @@ void btrfs_free_fs_info(struct btrfs_fs_info *fs_info)
free(fs_info->dev_root);
free(fs_info->csum_root);
free(fs_info->quota_root);
+ free(fs_info->free_space_root);
free(fs_info->super_copy);
free(fs_info->log_root_tree);
free(fs_info);
@@ -830,12 +831,13 @@ struct btrfs_fs_info *btrfs_new_fs_info(int writable, u64 sb_bytenr)
fs_info->dev_root = calloc(1, sizeof(struct btrfs_root));
fs_info->csum_root = calloc(1, sizeof(struct btrfs_root));
fs_info->quota_root = calloc(1, sizeof(struct btrfs_root));
+ fs_info->free_space_root = calloc(1, sizeof(struct btrfs_root));
fs_info->super_copy = calloc(1, BTRFS_SUPER_INFO_SIZE);
if (!fs_info->tree_root || !fs_info->extent_root ||
!fs_info->chunk_root || !fs_info->dev_root ||
!fs_info->csum_root || !fs_info->quota_root ||
- !fs_info->super_copy)
+ !fs_info->free_space_root || !fs_info->super_copy)
goto free_all;
extent_io_tree_init(&fs_info->extent_cache);
@@ -1016,6 +1018,16 @@ int btrfs_setup_all_roots(struct btrfs_fs_info *fs_info, u64 root_tree_bytenr,
if (ret == 0)
fs_info->quota_enabled = 1;
+ if (btrfs_fs_compat_ro(fs_info, BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE)) {
+ ret = find_and_setup_root(root, fs_info, BTRFS_FREE_SPACE_TREE_OBJECTID,
+ fs_info->free_space_root);
+ if (ret) {
+ printk("Couldn't read free space tree\n");
+ return -EIO;
+ }
+ fs_info->free_space_root->track_dirty = 1;
+ }
+
ret = find_and_setup_log_root(root, fs_info, sb);
if (ret) {
printk("Couldn't setup log root tree\n");
@@ -1041,6 +1053,8 @@ int btrfs_setup_all_roots(struct btrfs_fs_info *fs_info, u64 root_tree_bytenr,
void btrfs_release_all_roots(struct btrfs_fs_info *fs_info)
{
+ if (fs_info->free_space_root)
+ free_extent_buffer(fs_info->free_space_root->node);
if (fs_info->quota_root)
free_extent_buffer(fs_info->quota_root->node);
if (fs_info->csum_root)