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| author | Mikulas Patocka <mpatocka@redhat.com> | 2012-07-27 15:08:00 +0100 |
|---|---|---|
| committer | Alasdair G Kergon <agk@redhat.com> | 2012-07-27 15:08:00 +0100 |
| commit | f14fa693c93078444b5e95d7cad78ead0383ad50 (patch) | |
| tree | 72efcd3104d4eab2d420626b98264dd670343fd0 /drivers | |
| parent | f09996c993e256fce4b920588959866998d51250 (diff) | |
| download | linux-3.10-f14fa693c93078444b5e95d7cad78ead0383ad50.tar.gz linux-3.10-f14fa693c93078444b5e95d7cad78ead0383ad50.tar.bz2 linux-3.10-f14fa693c93078444b5e95d7cad78ead0383ad50.zip | |
dm stripe: fix size test
dm-stripe is supposed to ensure that all the space allocated to the
stripes is fully used and that all stripes are the same size. This
patch fixes the test. It checks that device length is divisible by the
chunk size and checks that the resulting quotient is divisible by the
number of stripes (which is equivalent to testing if device length is
divisible by chunk_size * stripes).
Previously, the code only tested that the number of sectors in the target
was divisible by each of the chunk size and the number of stripes
separately, which could leave entire stripes unused.
(A setup that genuinely needs some stripes to be shorter than others
can be created by concatenating striped targets.)
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/md/dm-stripe.c | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/drivers/md/dm-stripe.c b/drivers/md/dm-stripe.c index 183db5d3e48..1f6316ed2b3 100644 --- a/drivers/md/dm-stripe.c +++ b/drivers/md/dm-stripe.c @@ -132,7 +132,6 @@ static int stripe_ctr(struct dm_target *ti, unsigned int argc, char **argv) return -EINVAL; } - width = ti->len; if (sector_div(width, stripes)) { ti->error = "Target length not divisible by " "number of stripes"; |