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| author | Mikulas Patocka <mpatocka@redhat.com> | 2009-06-22 11:12:25 +0200 |
|---|---|---|
| committer | Alasdair G Kergon <agk@redhat.com> | 2009-06-22 11:12:25 +0200 |
| commit | 5af443a7e1c0864100cc44525a9821aa2a2f4719 (patch) | |
| tree | 87ab19984e94c8aaba743e47ab62cf084afbdf2c /drivers/md/dm-io.c | |
| parent | dm snapshot: support barriers (diff) | |
| download | linux-5af443a7e1c0864100cc44525a9821aa2a2f4719.tar.xz linux-5af443a7e1c0864100cc44525a9821aa2a2f4719.zip | |
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.c | 8 |
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; |