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authorMikulas Patocka <mpatocka@redhat.com>2009-06-22 13:12:25 +0400
committerAlasdair G Kergon <agk@redhat.com>2009-06-22 13:12:25 +0400
commit5af443a7e1c0864100cc44525a9821aa2a2f4719 (patch)
tree87ab19984e94c8aaba743e47ab62cf084afbdf2c /drivers/md/dm-io.c
parent494b3ee7d4f69210def80aecce28d08c3f0755d5 (diff)
downloadlinux-5af443a7e1c0864100cc44525a9821aa2a2f4719.tar.xz
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: Mikulas Patocka <mpatocka@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Diffstat (limited to 'drivers/md/dm-io.c')
-rw-r--r--drivers/md/dm-io.c8
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/md/dm-io.c b/drivers/md/dm-io.c
index e73aabd61cd7..a89f41f00757 100644
--- a/drivers/md/dm-io.c
+++ b/drivers/md/dm-io.c
@@ -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;