Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-11-27 06:31:52 +00:00
Code Issues Packages Projects Releases Wiki Activity

dm integrity: count and display checksum failures

Browse Source 
This changes DM integrity to count the number of checksum failures and
report the counter in response to STATUSTYPE_INFO request (via 'dmsetup
status').

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
This commit is contained in:
Mikulas Patocka 2017-07-21 12:00:00 -04:00 committed by Mike Snitzer
parent 1e3b21c6fb
commit 3f2e539359
1 changed files with 8 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
drivers/md/dm-integrity.c
View File

@ -225,6 +225,8 @@ struct dm_integrity_c {
struct alg_spec internal_hash_alg;
struct alg_spec journal_crypt_alg;
struct alg_spec journal_mac_alg;
atomic64_t number_of_mismatches;
};
struct dm_integrity_range {
@ -309,6 +311,8 @@ static void dm_integrity_dtr(struct dm_target *ti);
static void dm_integrity_io_error(struct dm_integrity_c *ic, const char *msg, int err)
{
if (err == -EILSEQ)
atomic64_inc(&ic->number_of_mismatches);
if (!cmpxchg(&ic->failed, 0, err))
DMERR("Error on %s: %d", msg, err);
}
@ -1273,6 +1277,7 @@ again:
DMERR("Checksum failed at sector 0x%llx",
(unsigned long long)(sector - ((r + ic->tag_size - 1) / ic->tag_size)));
r = -EILSEQ;
atomic64_inc(&ic->number_of_mismatches);
}
if (likely(checksums != checksums_onstack))
kfree(checksums);
@ -2230,7 +2235,7 @@ static void dm_integrity_status(struct dm_target *ti, status_type_t type,
switch (type) {
case STATUSTYPE_INFO:
result[0] = '\0';
DMEMIT("%llu", (unsigned long long)atomic64_read(&ic->number_of_mismatches));
break;
case STATUSTYPE_TABLE: {
@ -2803,6 +2808,7 @@ static int dm_integrity_ctr(struct dm_target *ti, unsigned argc, char **argv)
bio_list_init(&ic->flush_bio_list);
init_waitqueue_head(&ic->copy_to_journal_wait);
init_completion(&ic->crypto_backoff);
atomic64_set(&ic->number_of_mismatches, 0);
r = dm_get_device(ti, argv[0], dm_table_get_mode(ti->table), &ic->dev);
if (r) {
@ -3199,7 +3205,7 @@ static void dm_integrity_dtr(struct dm_target *ti)
static struct target_type integrity_target = {
.name = "integrity",
.version = {1, 0, 0},
.version = {1, 1, 0},
.module = THIS_MODULE,
.features = DM_TARGET_SINGLETON | DM_TARGET_INTEGRITY,
.ctr = dm_integrity_ctr,