Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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>
authored by
yangerkun
and committed by
Mike Snitzer
0c248ea2
4f7f590b
+44
+17
Documentation/admin-guide/device-mapper/dm-dust.rst
+17
Documentation/admin-guide/device-mapper/dm-dust.rst
···
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dust_clear_badblocks: no badblocks found
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Listing the bad block list
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--------------------------
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To list all bad blocks in the bad block list (using an example device
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with blocks 1 and 2 in the bad block list), run the following message
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command::
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$ sudo dmsetup message dust1 0 listbadblocks
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1
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2
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If there are no bad blocks in the bad block list, the command will
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execute with no output::
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$ sudo dmsetup message dust1 0 listbadblocks
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Message commands list
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---------------------
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···
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countbadblocks
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clearbadblocks
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listbadblocks
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disable
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enable
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quiet
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drivers/md/dm-dust.c
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drivers/md/dm-dust.c
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return 1;
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}
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static int dust_list_badblocks(struct dust_device *dd, char *result, unsigned int maxlen,
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unsigned int *sz_ptr)
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{
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unsigned long flags;
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struct rb_root badblocklist;
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struct rb_node *node;
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struct badblock *bblk;
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unsigned int sz = *sz_ptr;
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unsigned long long num = 0;
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spin_lock_irqsave(&dd->dust_lock, flags);
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badblocklist = dd->badblocklist;
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for (node = rb_first(&badblocklist); node; node = rb_next(node)) {
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bblk = rb_entry(node, struct badblock, node);
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DMEMIT("%llu\n", bblk->bb);
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num++;
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}
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spin_unlock_irqrestore(&dd->dust_lock, flags);
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if (!num)
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DMEMIT("No blocks in badblocklist");
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return 1;
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}
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/*
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* Target parameters:
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*
···
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else
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dd->quiet_mode = false;
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r = 0;
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} else if (!strcasecmp(argv[0], "listbadblocks")) {
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r = dust_list_badblocks(dd, result, maxlen, &sz);
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} else {
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invalid_msg = true;
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}