diff options
| -rw-r--r-- | drivers/md/bcache/sysfs.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/md/bcache/sysfs.c b/drivers/md/bcache/sysfs.c index b9166ee027fa..9be27b26d300 100644 --- a/drivers/md/bcache/sysfs.c +++ b/drivers/md/bcache/sysfs.c @@ -68,6 +68,7 @@ read_attribute(btree_written); read_attribute(metadata_written); read_attribute(active_journal_entries); read_attribute(backing_dev_name); +read_attribute(backing_dev_uuid); sysfs_time_stats_attribute(btree_gc, sec, ms); sysfs_time_stats_attribute(btree_split, sec, us); @@ -250,6 +251,13 @@ SHOW(__bch_cached_dev) return strlen(buf); } + if (attr == &sysfs_backing_dev_uuid) { + /* convert binary uuid into 36-byte string plus '\0' */ + snprintf(buf, 36+1, "%pU", dc->sb.uuid); + strcat(buf, "\n"); + return strlen(buf); + } + #undef var return 0; } @@ -460,6 +468,7 @@ static struct attribute *bch_cached_dev_files[] = { &sysfs_bypass_torture_test, #endif &sysfs_backing_dev_name, + &sysfs_backing_dev_uuid, NULL }; KTYPE(bch_cached_dev); |