From 0c248ea27fc88cf8a3035ba0ed75b210be9abf80 Mon Sep 17 00:00:00 2001 From: yangerkun Date: Fri, 19 Jun 2020 17:12:42 -0400 Subject: 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 Signed-off-by: Bryan Gurney Signed-off-by: Mike Snitzer --- drivers/md/dm-dust.c | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+) (limited to 'drivers/md/dm-dust.c') 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; } -- cgit v1.2.3