From 5af443a7e1c0864100cc44525a9821aa2a2f4719 Mon Sep 17 00:00:00 2001 From: Mikulas Patocka Date: Mon, 22 Jun 2009 10:12:25 +0100 Subject: [PATCH] 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 Signed-off-by: Alasdair G Kergon --- drivers/md/dm-io.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) 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; -- 2.20.1