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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>
This commit is contained in:
Mikulas Patocka 2012-12-21 20:23:39 +00:00 committed by Alasdair G Kergon
parent 89c7cd8974
commit c7cfdf5973
1 changed files with 11 additions and 4 deletions
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15
drivers/md/dm-flakey.c
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@ -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,