diff options
| author | yangerkun <yangerkun@huawei.com> | 2020-06-20 00:12:42 +0300 |
|---|---|---|
| committer | Mike Snitzer <snitzer@redhat.com> | 2020-07-20 18:17:41 +0300 |
| commit | 0c248ea27fc88cf8a3035ba0ed75b210be9abf80 (patch) | |
| tree | 71b4b586f35944e129f8db51e660b0ff922bf48c /drivers/md/dm-dust.c | |
| parent | 4f7f590b152444c1403ece9eeeddd1e8b22ba04e (diff) | |
| download | linux-0c248ea27fc88cf8a3035ba0ed75b210be9abf80.tar.xz | |
dm dust: add interface to list all badblocks
This interface may help anyone who want to know all badblocks without
querying for each block.
[Bryan: DMEMIT message if no blocks are in the bad block list.]
Signed-off-by: yangerkun <yangerkun@huawei.com>
Signed-off-by: Bryan Gurney <bgurney@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Diffstat (limited to 'drivers/md/dm-dust.c')
| -rw-r--r-- | drivers/md/dm-dust.c | 27 |
1 files changed, 27 insertions, 0 deletions
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; } |