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authorMikulas Patocka <mpatocka@redhat.com>2017-07-21 12:00:00 -0400
committerMike Snitzer <snitzer@redhat.com>2017-08-28 11:47:17 -0400
commit3f2e539359bd0e709eb35127dc04df6bf8c3e8de (patch)
tree61a07d683211e04f852c3e1b7b4e9fe9c3852996 /drivers/md/dm-integrity.c
parentdm integrity: optimize writing dm-bufio buffers that are partially changed (diff)
downloadlinux-dev-3f2e539359bd0e709eb35127dc04df6bf8c3e8de.tar.xz
linux-dev-3f2e539359bd0e709eb35127dc04df6bf8c3e8de.zip
dm integrity: count and display checksum failures
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>
Diffstat (limited to 'drivers/md/dm-integrity.c')
-rw-r--r--drivers/md/dm-integrity.c10
1 files changed, 8 insertions, 2 deletions
diff --git a/drivers/md/dm-integrity.c b/drivers/md/dm-integrity.c
index 689f89d8eeef..47fd409b2e2a 100644
--- a/drivers/md/dm-integrity.c
+++ b/drivers/md/dm-integrity.c
@@ -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,