imsm: implement "--examine-badblocks" command

Implement "--examine-badblocks" command to provide list of bad blocks in
metadata for a disk.

Signed-off-by: Tomasz Majchrzak <tomasz.majchrzak@intel.com>
Signed-off-by: Jes Sorensen <Jes.Sorensen@redhat.com>

diff --git a/super-intel.c b/super-intel.c
index f4cb89cb66c64fc85c8b39444be5bcdd1778295e..560d21732590b1494985b5c9228fc4bf83f29eab 100644 (file)
--- a/super-intel.c
+++ b/super-intel.c
@@ -9919,6 +9919,61 @@ static struct md_bb *imsm_get_badblocks(struct active_array *a, int slot)
 
        return &super->bb;
 }
+/*******************************************************************************
+* Function:   examine_badblocks_imsm
+* Description: Prints list of bad blocks on a disk to the standard output
+*
+* Parameters:
+*     st       : metadata handler
+*     fd       : open file descriptor for device
+*     devname  : device name
+* Returns:
+*     0 : Success
+*     1 : Error
+******************************************************************************/
+static int examine_badblocks_imsm(struct supertype *st, int fd, char *devname)
+{
+       struct intel_super *super = st->sb;
+       struct bbm_log *log = super->bbm_log;
+       struct dl *d = NULL;
+       int any = 0;
+
+       for (d = super->disks; d ; d = d->next) {
+               if (strcmp(d->devname, devname) == 0)
+                       break;
+       }
+
+       if ((d == NULL) || (d->index < 0)) { /* serial mismatch probably */
+               pr_err("%s doesn't appear to be part of a raid array\n",
+                      devname);
+               return 1;
+       }
+
+       if (log != NULL) {
+               unsigned int i;
+               struct bbm_log_entry *entry = &log->marked_block_entries[0];
+
+               for (i = 0; i < log->entry_count; i++) {
+                       if (entry[i].disk_ordinal == d->index) {
+                               unsigned long long sector = __le48_to_cpu(
+                                       &entry[i].defective_block_start);
+                               int cnt = entry[i].marked_count + 1;
+
+                               if (!any) {
+                                       printf("Bad-blocks on %s:\n", devname);
+                                       any = 1;
+                               }
+
+                               printf("%20llu for %d sectors\n", sector, cnt);
+                       }
+               }
+       }
+
+       if (!any)
+               printf("No bad-blocks list configured on %s\n", devname);
+
+       return 0;
+}
 /*******************************************************************************
  * Function:   init_migr_record_imsm
  * Description:        Function inits imsm migration record
@@ -11440,6 +11495,7 @@ struct superswitch super_imsm = {
        .manage_reshape = imsm_manage_reshape,
        .recover_backup = recover_backup_imsm,
        .copy_metadata = copy_metadata_imsm,
+       .examine_badblocks = examine_badblocks_imsm,
 #endif
        .match_home     = match_home_imsm,
        .uuid_from_super= uuid_from_super_imsm,