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authorMikulas Patocka <mpatocka@redhat.com>2012-12-21 20:23:39 +0000
committerAlasdair G Kergon <agk@redhat.com>2012-12-21 20:23:39 +0000
commitc7cfdf5973f644a21ef4a0a0f1aa1f081efc42c1 (patch)
treefe9c287cca218170bd244ee688888cd775271f89
parent89c7cd8974035f1fbfac5c01e668b2de0733b443 (diff)
downloadlinux-stericsson-c7cfdf5973f644a21ef4a0a0f1aa1f081efc42c1.tar.gz
dm flakey: dont use map_context
Replace map_info with a per-bio structure "struct per_bio_data" in dm-flakey. Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
-rw-r--r--drivers/md/dm-flakey.c15
1 files changed, 11 insertions, 4 deletions
diff --git a/drivers/md/dm-flakey.c b/drivers/md/dm-flakey.c
index cc15543a6ad7..660f98167e7b 100644
--- a/drivers/md/dm-flakey.c
+++ b/drivers/md/dm-flakey.c
@@ -39,6 +39,10 @@ enum feature_flag_bits {
DROP_WRITES
};
+struct per_bio_data {
+ bool bio_submitted;
+};
+
static int parse_features(struct dm_arg_set *as, struct flakey_c *fc,
struct dm_target *ti)
{
@@ -214,6 +218,7 @@ static int flakey_ctr(struct dm_target *ti, unsigned int argc, char **argv)
ti->num_flush_requests = 1;
ti->num_discard_requests = 1;
+ ti->per_bio_data_size = sizeof(struct per_bio_data);
ti->private = fc;
return 0;
@@ -270,6 +275,8 @@ static int flakey_map(struct dm_target *ti, struct bio *bio,
{
struct flakey_c *fc = ti->private;
unsigned elapsed;
+ struct per_bio_data *pb = dm_per_bio_data(bio, sizeof(struct per_bio_data));
+ pb->bio_submitted = false;
/* Are we alive ? */
elapsed = (jiffies - fc->start_time) / HZ;
@@ -277,7 +284,7 @@ static int flakey_map(struct dm_target *ti, struct bio *bio,
/*
* Flag this bio as submitted while down.
*/
- map_context->ll = 1;
+ pb->bio_submitted = true;
/*
* Map reads as normal.
@@ -318,13 +325,13 @@ static int flakey_end_io(struct dm_target *ti, struct bio *bio,
int error, union map_info *map_context)
{
struct flakey_c *fc = ti->private;
- unsigned bio_submitted_while_down = map_context->ll;
+ struct per_bio_data *pb = dm_per_bio_data(bio, sizeof(struct per_bio_data));
/*
* Corrupt successful READs while in down state.
* If flags were specified, only corrupt those that match.
*/
- if (fc->corrupt_bio_byte && !error && bio_submitted_while_down &&
+ if (fc->corrupt_bio_byte && !error && pb->bio_submitted &&
(bio_data_dir(bio) == READ) && (fc->corrupt_bio_rw == READ) &&
all_corrupt_bio_flags_match(bio, fc))
corrupt_bio_data(bio, fc);
@@ -406,7 +413,7 @@ static int flakey_iterate_devices(struct dm_target *ti, iterate_devices_callout_
static struct target_type flakey_target = {
.name = "flakey",
- .version = {1, 2, 0},
+ .version = {1, 3, 0},
.module = THIS_MODULE,
.ctr = flakey_ctr,
.dtr = flakey_dtr,