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Btrfs: remove transaction from btrfs send 

Since daivd did the work that force us to use readonly snapshot,
we can safely remove transaction protection from btrfs send.

Signed-off-by: Wang Shilong <wangsl.fnst@cn.fujitsu.com>
Signed-off-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: Chris Mason <clm@fb.com>
This commit is contained in:
Wang Shilong 2013-12-17 19:57:21 +08:00 committed by Chris Mason
parent 536cd96401
commit 41ce9970a8
1 changed files with 0 additions and 33 deletions
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33
fs/btrfs/send.c
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@ -4618,7 +4618,6 @@ out:
static int full_send_tree(struct send_ctx *sctx)
{
int ret;
struct btrfs_trans_handle *trans = NULL;
struct btrfs_root *send_root = sctx->send_root;
struct btrfs_key key;
struct btrfs_key found_key;
@ -4640,19 +4639,6 @@ static int full_send_tree(struct send_ctx *sctx)
key.type = BTRFS_INODE_ITEM_KEY;
key.offset = 0;
join_trans:
/*
* We need to make sure the transaction does not get committed
* while we do anything on commit roots. Join a transaction to prevent
* this.
*/
trans = btrfs_join_transaction(send_root);
if (IS_ERR(trans)) {
ret = PTR_ERR(trans);
trans = NULL;
goto out;
}
/*
* Make sure the tree has not changed after re-joining. We detect this
* by comparing start_ctransid and ctransid. They should always match.
@ -4676,19 +4662,6 @@ join_trans:
goto out_finish;
while (1) {
/*
* When someone want to commit while we iterate, end the
* joined transaction and rejoin.
*/
if (btrfs_should_end_transaction(trans, send_root)) {
ret = btrfs_end_transaction(trans, send_root);
trans = NULL;
if (ret < 0)
goto out;
btrfs_release_path(path);
goto join_trans;
}
eb = path->nodes[0];
slot = path->slots[0];
btrfs_item_key_to_cpu(eb, &found_key, slot);
@ -4716,12 +4689,6 @@ out_finish:
out:
btrfs_free_path(path);
if (trans) {
if (!ret)
ret = btrfs_end_transaction(trans, send_root);
else
btrfs_end_transaction(trans, send_root);
}
return ret;
}