diff options
| -rw-r--r-- | Documentation/admin-guide/device-mapper/dm-dust.rst | 17 | ||||
| -rw-r--r-- | drivers/md/dm-dust.c | 27 |
2 files changed, 44 insertions, 0 deletions
diff --git a/Documentation/admin-guide/device-mapper/dm-dust.rst b/Documentation/admin-guide/device-mapper/dm-dust.rst index cf8079e368de..e35ec8cd2f88 100644 --- a/Documentation/admin-guide/device-mapper/dm-dust.rst +++ b/Documentation/admin-guide/device-mapper/dm-dust.rst @@ -206,6 +206,22 @@ appear:: dust_clear_badblocks: no badblocks found +Listing the bad block list +-------------------------- + +To list all bad blocks in the bad block list (using an example device +with blocks 1 and 2 in the bad block list), run the following message +command:: + + $ sudo dmsetup message dust1 0 listbadblocks + 1 + 2 + +If there are no bad blocks in the bad block list, the command will +execute with no output:: + + $ sudo dmsetup message dust1 0 listbadblocks + Message commands list --------------------- @@ -224,6 +240,7 @@ Single argument message commands:: countbadblocks clearbadblocks + listbadblocks disable enable quiet diff --git a/drivers/md/dm-dust.c b/drivers/md/dm-dust.c index f1f2dd6a4e84..072ea913cebc 100644 --- a/drivers/md/dm-dust.c +++ b/drivers/md/dm-dust.c @@ -284,6 +284,31 @@ static int dust_clear_badblocks(struct dust_device *dd, char *result, unsigned i return 1; } +static int dust_list_badblocks(struct dust_device *dd, char *result, unsigned int maxlen, + unsigned int *sz_ptr) +{ + unsigned long flags; + struct rb_root badblocklist; + struct rb_node *node; + struct badblock *bblk; + unsigned int sz = *sz_ptr; + unsigned long long num = 0; + + spin_lock_irqsave(&dd->dust_lock, flags); + badblocklist = dd->badblocklist; + for (node = rb_first(&badblocklist); node; node = rb_next(node)) { + bblk = rb_entry(node, struct badblock, node); + DMEMIT("%llu\n", bblk->bb); + num++; + } + + spin_unlock_irqrestore(&dd->dust_lock, flags); + if (!num) + DMEMIT("No blocks in badblocklist"); + + return 1; +} + /* * Target parameters: * @@ -427,6 +452,8 @@ static int dust_message(struct dm_target *ti, unsigned int argc, char **argv, else dd->quiet_mode = false; r = 0; + } else if (!strcasecmp(argv[0], "listbadblocks")) { + r = dust_list_badblocks(dd, result, maxlen, &sz); } else { invalid_msg = true; } |