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Btrfs: remove unnecessary transaction commit before send 

We will finish orphan cleanups during snapshot, so we don't
have to commit transaction here.

Signed-off-by: Wang Shilong <wangsl.fnst@cn.fujitsu.com>
Reviewed-by: Miao Xie <miaox@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 2014-01-07 17:26:57 +08:00 committed by Chris Mason
parent 18f687d538
commit 8e56338d7d
1 changed files with 0 additions and 29 deletions
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29
fs/btrfs/send.c
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@ -4775,35 +4775,6 @@ long btrfs_ioctl_send(struct file *mnt_file, void __user *arg_)
*/
WARN_ON(send_root->orphan_cleanup_state != ORPHAN_CLEANUP_DONE);
/*
* If we just created this root we need to make sure that the orphan
* cleanup has been done and committed since we search the commit root,
* so check its commit root transid with our otransid and if they match
* commit the transaction to make sure everything is updated.
*/
down_read(&send_root->fs_info->extent_commit_sem);
if (btrfs_header_generation(send_root->commit_root) ==
btrfs_root_otransid(&send_root->root_item)) {
struct btrfs_trans_handle *trans;
up_read(&send_root->fs_info->extent_commit_sem);
trans = btrfs_attach_transaction_barrier(send_root);
if (IS_ERR(trans)) {
if (PTR_ERR(trans) != -ENOENT) {
ret = PTR_ERR(trans);
goto out;
}
/* ENOENT means theres no transaction */
} else {
ret = btrfs_commit_transaction(trans, send_root);
if (ret)
goto out;
}
} else {
up_read(&send_root->fs_info->extent_commit_sem);
}
/*
* Userspace tools do the checks and warn the user if it's
* not RO.