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authorMike Snitzer <snitzer@redhat.com>2012-07-27 15:08:00 +0100
committerAlasdair G Kergon <agk@redhat.com>2012-07-27 15:08:00 +0100
commit542f90381422676544382d4071ba44a2de90a0c1 (patch)
tree0eae6798ab2fdef68a0eb1ea5ac14f3cc3ffb740 /drivers/md/dm-raid1.c
parent1df05483d758ea43abc375869fbe06be506ba827 (diff)
downloadtalos-obmc-linux-542f90381422676544382d4071ba44a2de90a0c1.tar.gz
talos-obmc-linux-542f90381422676544382d4071ba44a2de90a0c1.zip
dm: support non power of two target max_io_len
Remove the restriction that limits a target's specified maximum incoming I/O size to be a power of 2. Rename this setting from 'split_io' to the less-ambiguous 'max_io_len'. Change it from sector_t to uint32_t, which is plenty big enough, and introduce a wrapper function dm_set_target_max_io_len() to set it. Use sector_div() to process it now that it is not necessarily a power of 2. Signed-off-by: Mike Snitzer <snitzer@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Diffstat (limited to 'drivers/md/dm-raid1.c')
-rw-r--r--drivers/md/dm-raid1.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/md/dm-raid1.c b/drivers/md/dm-raid1.c
index b58b7a33914a..819ccba65912 100644
--- a/drivers/md/dm-raid1.c
+++ b/drivers/md/dm-raid1.c
@@ -1081,7 +1081,11 @@ static int mirror_ctr(struct dm_target *ti, unsigned int argc, char **argv)
}
ti->private = ms;
- ti->split_io = dm_rh_get_region_size(ms->rh);
+
+ r = dm_set_target_max_io_len(ti, dm_rh_get_region_size(ms->rh));
+ if (r)
+ goto err_free_context;
+
ti->num_flush_requests = 1;
ti->num_discard_requests = 1;
ti->discard_zeroes_data_unsupported = 1;
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