diff options
| author | NeilBrown <neilb@suse.de> | 2006-03-27 01:17:49 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-03-27 08:44:59 -0800 |
| commit | 969429b504ae866d3f8b1cafd68a2c099e305093 (patch) | |
| tree | 538c0a77049450e434cfc890807822491f766113 | |
| parent | 4ee218cd67b385759993a6c840ea45f0ee0a8b30 (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>
| -rw-r--r-- | drivers/md/dm-table.c | 9 | ||||
| -rw-r--r-- | include/linux/device-mapper.h | 1 |
2 files changed, 10 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) diff --git a/include/linux/device-mapper.h b/include/linux/device-mapper.h index 51e0e95a421..aee10b2ea4c 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 { |