From: yangerkun <yangerkun@xxxxxxxxxx>
From: yangerkun <yangerkun@xxxxxxxxxx>
This interface may help anyone who want to know all badblocks without
query block for each.
[Bryan: DMEMIT an empty list if no blocks are in the bad block list.]
Signed-off-by: yangerkun <yangerkun@xxxxxxxxxx>
Signed-off-by: Bryan Gurney <bgurney@xxxxxxxxxx>
---
drivers/md/dm-dust.c | 27 +++++++++++++++++++++++++++
1 file changed, 27 insertions(+)
diff --git a/drivers/md/dm-dust.c b/drivers/md/dm-dust.c
index f1f2dd6a4e84..f7be00a54268 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("");
+
+ 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;
}
--
2.25.4
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