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btrfs: raid56: simplify error handling and code flow in raid56_parity_write

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Handle the error return on alloc_rbio failure directly instead of using
a goto and remove the queue_rbio goto label by moving the plugged
check into the if branch.

Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Christoph Hellwig 2023-01-11 07:23:25 +01:00 committed by David Sterba
parent 79b02ec1d8
commit abb49e8742
1 changed files with 15 additions and 22 deletions
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37
fs/btrfs/raid56.c
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@ -1667,12 +1667,12 @@ void raid56_parity_write(struct bio *bio, struct btrfs_io_context *bioc)
struct btrfs_raid_bio *rbio;
struct btrfs_plug_cb *plug = NULL;
struct blk_plug_cb *cb;
int ret = 0;
rbio = alloc_rbio(fs_info, bioc);
if (IS_ERR(rbio)) {
ret = PTR_ERR(rbio);
goto fail;
bio->bi_status = errno_to_blk_status(PTR_ERR(rbio));
bio_endio(bio);
return;
}
rbio->operation = BTRFS_RBIO_WRITE;
rbio_add_bio(rbio, bio);
@ -1681,31 +1681,24 @@ void raid56_parity_write(struct bio *bio, struct btrfs_io_context *bioc)
* Don't plug on full rbios, just get them out the door
* as quickly as we can
*/
if (rbio_is_full(rbio))
goto queue_rbio;
cb = blk_check_plugged(raid_unplug, fs_info, sizeof(*plug));
if (cb) {
plug = container_of(cb, struct btrfs_plug_cb, cb);
if (!plug->info) {
plug->info = fs_info;
INIT_LIST_HEAD(&plug->rbio_list);
if (!rbio_is_full(rbio)) {
cb = blk_check_plugged(raid_unplug, fs_info, sizeof(*plug));
if (cb) {
plug = container_of(cb, struct btrfs_plug_cb, cb);
if (!plug->info) {
plug->info = fs_info;
INIT_LIST_HEAD(&plug->rbio_list);
}
list_add_tail(&rbio->plug_list, &plug->rbio_list);
return;
}
list_add_tail(&rbio->plug_list, &plug->rbio_list);
return;
}
queue_rbio:
/*
* Either we don't have any existing plug, or we're doing a full stripe,
* can queue the rmw work now.
* queue the rmw work now.
*/
start_async_work(rbio, rmw_rbio_work);
return;
fail:
bio->bi_status = errno_to_blk_status(ret);
bio_endio(bio);
}
static int verify_one_sector(struct btrfs_raid_bio *rbio,