dm dust: add interface to list all badblocks (0c248ea2) · Commits · 戴 / test

Documentation/admin-guide/device-mapper/dm-dust.rst

+17 −0

Original line number	Diff line number	Diff line
		@@ -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

+27 −0

Original line number	Diff line number	Diff line
		@@ -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;
		}