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Btrfs: avoid unnecessary utimes update in incremental send

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When we're finishing processing of an inode, if we're dealing with a
directory inode that has a pending move/rename operation, we don't
need to send a utimes update instruction to the send stream, as we'll
do it later after doing the move/rename operation. Therefore we save
some time here building paths and doing btree lookups.

Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com>
Signed-off-by: Josef Bacik <jbacik@fb.com>
This commit is contained in:
Filipe Manana 2014-03-03 12:28:40 +00:00 committed by Josef Bacik
parent e2127cf008
commit fcbd2154d1
1 changed files with 11 additions and 10 deletions
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21
fs/btrfs/send.c
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@ -4957,18 +4957,19 @@ static int finish_inode_if_needed(struct send_ctx *sctx, int at_end)
ret = apply_children_dir_moves(sctx);
if (ret)
goto out;
/*
* Need to send that every time, no matter if it actually
* changed between the two trees as we have done changes to
* the inode before. If our inode is a directory and it's
* waiting to be moved/renamed, we will send its utimes when
* it's moved/renamed, therefore we don't need to do it here.
*/
sctx->send_progress = sctx->cur_ino + 1;
ret = send_utimes(sctx, sctx->cur_ino, sctx->cur_inode_gen);
if (ret < 0)
goto out;
}
/*
* Need to send that every time, no matter if it actually
* changed between the two trees as we have done changes to
* the inode before.
*/
sctx->send_progress = sctx->cur_ino + 1;
ret = send_utimes(sctx, sctx->cur_ino, sctx->cur_inode_gen);
if (ret < 0)
goto out;
out:
return ret;
}