Commit 5af443a7 authored by Mikulas Patocka's avatar Mikulas Patocka Committed by Alasdair G Kergon
Browse files

dm io: record eopnotsupp 



Add another field, eopnotsupp_bits. It is subset of error_bits, representing
regions that returned -EOPNOTSUPP.  (The bit is set in both error_bits and
eopnotsupp_bits).

This value will be used in further patches.

Signed-off-by: default avatarMikulas Patocka <mpatocka@redhat.com>
Signed-off-by: default avatarAlasdair G Kergon <agk@redhat.com>
parent 494b3ee7

drivers/md/dm-io.c

+7 −1
Original line number Diff line number Diff line
@@ -22,6 +22,7 @@ struct dm_io_client { 
/* FIXME: can we shrink this ? */

struct io {

	unsigned long error_bits;

	unsigned long eopnotsupp_bits;

	atomic_t count;

	struct task_struct *sleeper;

	struct dm_io_client *client;
@@ -107,8 +108,11 @@ static inline unsigned bio_get_region(struct bio *bio) 
 *---------------------------------------------------------------*/

static void dec_count(struct io *io, unsigned int region, int error)

{

	if (error)

	if (error) {

		set_bit(region, &io->error_bits);

		if (error == -EOPNOTSUPP)

			set_bit(region, &io->eopnotsupp_bits);

	}



	if (atomic_dec_and_test(&io->count)) {

		if (io->sleeper)
@@ -361,6 +365,7 @@ static int sync_io(struct dm_io_client *client, unsigned int num_regions, 
	}



	io.error_bits = 0;

	io.eopnotsupp_bits = 0;

	atomic_set(&io.count, 1); /* see dispatch_io() */

	io.sleeper = current;

	io.client = client;
@@ -397,6 +402,7 @@ static int async_io(struct dm_io_client *client, unsigned int num_regions, 


	io = mempool_alloc(client->pool, GFP_NOIO);

	io->error_bits = 0;

	io->eopnotsupp_bits = 0;

	atomic_set(&io->count, 1); /* see dispatch_io() */

	io->sleeper = NULL;

	io->client = client;

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