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authorNeilBrown <neilb@suse.de>2006-03-27 01:17:49 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2006-03-27 08:44:59 -0800
commit969429b504ae866d3f8b1cafd68a2c099e305093 (patch)
tree538c0a77049450e434cfc890807822491f766113 /drivers
parent4ee218cd67b385759993a6c840ea45f0ee0a8b30 (diff)
[PATCH] dm: make sure QUEUE_FLAG_CLUSTER is set properly
This flag should be set for a virtual device iff it is set for all underlying devices. Signed-off-by: Neil Brown <neilb@suse.de> Acked-by: Alasdair G Kergon <agk@redhat.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/md/dm-table.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/md/dm-table.c b/drivers/md/dm-table.c
index 907b08ddb78..9558a4acec1 100644
--- a/drivers/md/dm-table.c
+++ b/drivers/md/dm-table.c
@@ -97,6 +97,8 @@ static void combine_restrictions_low(struct io_restrictions *lhs,
lhs->seg_boundary_mask =
min_not_zero(lhs->seg_boundary_mask, rhs->seg_boundary_mask);
+
+ lhs->no_cluster |= rhs->no_cluster;
}
/*
@@ -523,6 +525,8 @@ int dm_get_device(struct dm_target *ti, const char *path, sector_t start,
rs->seg_boundary_mask =
min_not_zero(rs->seg_boundary_mask,
q->seg_boundary_mask);
+
+ rs->no_cluster |= !test_bit(QUEUE_FLAG_CLUSTER, &q->queue_flags);
}
return r;
@@ -832,6 +836,11 @@ void dm_table_set_restrictions(struct dm_table *t, struct request_queue *q)
q->hardsect_size = t->limits.hardsect_size;
q->max_segment_size = t->limits.max_segment_size;
q->seg_boundary_mask = t->limits.seg_boundary_mask;
+ if (t->limits.no_cluster)
+ q->queue_flags &= ~(1 << QUEUE_FLAG_CLUSTER);
+ else
+ q->queue_flags |= (1 << QUEUE_FLAG_CLUSTER);
+
}
unsigned int dm_table_get_num_targets(struct dm_table *t)