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Btrfs: Metadata reservation for orphan inodes

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reserve metadata space for handling orphan inodes

Signed-off-by: Yan Zheng <zheng.yan@oracle.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Yan, Zheng
2010-05-16 10:49:58 -04:00
committed by Chris Mason
parent 8929ecfa50
commit d68fc57b7e
9 changed files with 367 additions and 68 deletions
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16
fs/btrfs/transaction.c
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@@ -676,6 +676,7 @@ static noinline int commit_fs_roots(struct btrfs_trans_handle *trans,
btrfs_free_log(trans, root);
btrfs_update_reloc_root(trans, root);
btrfs_orphan_commit_root(trans, root);
if (root->commit_root != root->node) {
switch_commit_root(root);
@@ -835,6 +836,8 @@ static noinline int create_pending_snapshot(struct btrfs_trans_handle *trans,
struct extent_buffer *tmp;
struct extent_buffer *old;
int ret;
int retries = 0;
u64 to_reserve = 0;
u64 index = 0;
u64 objectid;
@@ -850,6 +853,17 @@ static noinline int create_pending_snapshot(struct btrfs_trans_handle *trans,
goto fail;
}
btrfs_orphan_pre_snapshot(trans, pending, &to_reserve);
if (to_reserve > 0) {
ret = btrfs_block_rsv_add(trans, root, &pending->block_rsv,
to_reserve, &retries);
if (ret) {
pending->error = ret;
goto fail;
}
}
key.objectid = objectid;
key.offset = (u64)-1;
key.type = BTRFS_ROOT_ITEM_KEY;
@@ -909,6 +923,8 @@ static noinline int create_pending_snapshot(struct btrfs_trans_handle *trans,
key.offset = (u64)-1;
pending->snap = btrfs_read_fs_root_no_name(root->fs_info, &key);
BUG_ON(IS_ERR(pending->snap));
btrfs_orphan_post_snapshot(trans, pending);
fail:
kfree(new_root_item);
btrfs_block_rsv_release(root, &pending->block_rsv, (u64)-1);