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dm: change ->end_io calling convention

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Turn the error paramter into a pointer so that target drivers can change
the value, and make sure only DM_ENDIO_* values are returned from the
methods.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Christoph Hellwig
2017-06-03 09:38:03 +02:00
committed by Jens Axboe
parent 846785e6a5
commit 1be5690984
10 changed files with 51 additions and 50 deletions
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8
drivers/md/dm-flakey.c
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@@ -358,12 +358,12 @@ map_bio:
return DM_MAPIO_REMAPPED;
}
static int flakey_end_io(struct dm_target *ti, struct bio *bio, int error)
static int flakey_end_io(struct dm_target *ti, struct bio *bio, int *error)
{
struct flakey_c *fc = ti->private;
struct per_bio_data *pb = dm_per_bio_data(bio, sizeof(struct per_bio_data));
if (!error && pb->bio_submitted && (bio_data_dir(bio) == READ)) {
if (!*error && pb->bio_submitted && (bio_data_dir(bio) == READ)) {
if (fc->corrupt_bio_byte && (fc->corrupt_bio_rw == READ) &&
all_corrupt_bio_flags_match(bio, fc)) {
/*
@@ -377,11 +377,11 @@ static int flakey_end_io(struct dm_target *ti, struct bio *bio, int error)
* Error read during the down_interval if drop_writes
* and error_writes were not configured.
*/
return -EIO;
*error = -EIO;
}
}
return error;
return DM_ENDIO_DONE;
}
static void flakey_status(struct dm_target *ti, status_type_t type,