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-rw-r--r--drivers/md/dm-log.c30
1 files changed, 27 insertions, 3 deletions
diff --git a/drivers/md/dm-log.c b/drivers/md/dm-log.c
index 6a9261351848..a503d12c2ff8 100644
--- a/drivers/md/dm-log.c
+++ b/drivers/md/dm-log.c
@@ -152,6 +152,7 @@ struct log_c {
/*
* Disk log fields
*/
+ int log_dev_failed;
struct dm_dev *log_dev;
struct log_header header;
@@ -315,6 +316,7 @@ static int create_log_context(struct dirty_log *log, struct dm_target *ti,
lc->disk_header = NULL;
} else {
lc->log_dev = dev;
+ lc->log_dev_failed = 0;
lc->header_location.bdev = lc->log_dev->bdev;
lc->header_location.sector = 0;
@@ -437,6 +439,15 @@ static int count_bits32(uint32_t *addr, unsigned size)
return count;
}
+static void fail_log_device(struct log_c *lc)
+{
+ if (lc->log_dev_failed)
+ return;
+
+ lc->log_dev_failed = 1;
+ dm_table_event(lc->ti->table);
+}
+
static int disk_resume(struct dirty_log *log)
{
int r;
@@ -446,8 +457,12 @@ static int disk_resume(struct dirty_log *log)
/* read the disk header */
r = read_header(lc);
- if (r)
+ if (r) {
+ DMWARN("%s: Failed to read header on mirror log device",
+ lc->log_dev->name);
+ fail_log_device(lc);
return r;
+ }
/* set or clear any new bits -- device has grown */
if (lc->sync == NOSYNC)
@@ -472,7 +487,14 @@ static int disk_resume(struct dirty_log *log)
lc->header.nr_regions = lc->region_count;
/* write the new header */
- return write_header(lc);
+ r = write_header(lc);
+ if (r) {
+ DMWARN("%s: Failed to write header on mirror log device",
+ lc->log_dev->name);
+ fail_log_device(lc);
+ }
+
+ return r;
}
static uint32_t core_get_region_size(struct dirty_log *log)
@@ -516,7 +538,9 @@ static int disk_flush(struct dirty_log *log)
return 0;
r = write_header(lc);
- if (!r)
+ if (r)
+ fail_log_device(lc);
+ else
lc->touched = 0;
return r;