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| author | Mikulas Patocka <mpatocka@redhat.com> | 2009-12-10 23:52:00 +0000 |
|---|---|---|
| committer | Alasdair G Kergon <agk@redhat.com> | 2009-12-10 23:52:00 +0000 |
| commit | 5adc78d0d231b030405b31759f125f13404fdb64 (patch) | |
| tree | 8906799cb47e78790335eac122987872ef193dab /drivers/md/dm-log.c | |
| parent | 20a34a8ecc7d03eaa5054f58169ebff12f5f1f8c (diff) | |
| download | linux-5adc78d0d231b030405b31759f125f13404fdb64.tar.gz linux-5adc78d0d231b030405b31759f125f13404fdb64.tar.bz2 linux-5adc78d0d231b030405b31759f125f13404fdb64.zip | |
dm log: introduce flush_failed variable
Introduce "flush failed" variable. When a flush before clearing a bit
in the log fails, we don't know anything about which which regions are
in-sync and which not.
So we need to set all regions as not-in-sync and set the variable
"flush_failed" to prevent setting the in-sync bit in the future.
A target reload is the only way to get out of this situation.
The variable will be set in following patches.
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Diffstat (limited to 'drivers/md/dm-log.c')
| -rw-r--r-- | drivers/md/dm-log.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/md/dm-log.c b/drivers/md/dm-log.c index 6b23631db5b5..d779f8c915dd 100644 --- a/drivers/md/dm-log.c +++ b/drivers/md/dm-log.c @@ -210,6 +210,7 @@ struct log_c { struct dm_target *ti; int touched_dirtied; int touched_cleaned; + int flush_failed; uint32_t region_size; unsigned int region_count; region_t sync_count; @@ -394,6 +395,7 @@ static int create_log_context(struct dm_dirty_log *log, struct dm_target *ti, lc->ti = ti; lc->touched_dirtied = 0; lc->touched_cleaned = 0; + lc->flush_failed = 0; lc->region_size = region_size; lc->region_count = region_count; lc->sync = sync; @@ -706,7 +708,8 @@ static void core_mark_region(struct dm_dirty_log *log, region_t region) static void core_clear_region(struct dm_dirty_log *log, region_t region) { struct log_c *lc = (struct log_c *) log->context; - log_set_bit(lc, lc->clean_bits, region); + if (likely(!lc->flush_failed)) + log_set_bit(lc, lc->clean_bits, region); } static int core_get_resync_work(struct dm_dirty_log *log, region_t *region) |