This flag should be set for a virtual device iff it is set
for all underlying devices.
Signed-off-by: Neil Brown <neilb@xxxxxxx>
### Diffstat output
./drivers/md/dm-table.c | 9 +++++++++
./include/linux/device-mapper.h | 1 +
2 files changed, 10 insertions(+)
diff ./drivers/md/dm-table.c~current~ ./drivers/md/dm-table.c
--- ./drivers/md/dm-table.c~current~ 2006-02-13 09:18:02.000000000 +1100
+++ ./drivers/md/dm-table.c 2006-02-13 09:18:02.000000000 +1100
@@ -98,6 +98,8 @@ static void combine_restrictions_low(str
lhs->seg_boundary_mask =
min_not_zero(lhs->seg_boundary_mask, rhs->seg_boundary_mask);
+
+ lhs->no_cluster |= rhs->no_cluster;
}
/*
@@ -526,6 +528,8 @@ int dm_get_device(struct dm_target *ti,
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;
@@ -835,6 +839,11 @@ void dm_table_set_restrictions(struct dm
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 ./include/linux/device-mapper.h~current~ ./include/linux/device-mapper.h
--- ./include/linux/device-mapper.h~current~ 2006-02-13 09:18:02.000000000 +1100
+++ ./include/linux/device-mapper.h 2006-02-13 09:18:02.000000000 +1100
@@ -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 {
--
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