From: NeilBrown Date: Mon, 27 Mar 2006 09:17:49 +0000 (-0800) Subject: [PATCH] dm: make sure QUEUE_FLAG_CLUSTER is set properly X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=969429b504ae866d3f8b1cafd68a2c099e305093;p=deliverable%2Flinux.git [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 Acked-by: Alasdair G Kergon Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- diff --git a/drivers/md/dm-table.c b/drivers/md/dm-table.c index 907b08ddb783..9558a4acec12 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) diff --git a/include/linux/device-mapper.h b/include/linux/device-mapper.h index 51e0e95a421a..aee10b2ea4c6 100644 --- a/include/linux/device-mapper.h +++ b/include/linux/device-mapper.h @@ -97,6 +97,7 @@ struct io_restrictions { unsigned short hardsect_size; unsigned int max_segment_size; unsigned long seg_boundary_mask; + unsigned char no_cluster; /* inverted so that 0 is default */ }; struct dm_target {