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authorMilan Broz <mbroz@redhat.com>2006-10-03 01:15:36 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2006-10-03 08:04:15 -0700
commit8757b7764f13e336f3c0eb1f634440d4ee4c3a67 (patch)
treec91b00ace6ee438a9e447bce311808a698e9d487 /drivers/md/dm-table.c
parentcc1092019ce3d9b3e85a285b41e852ff94a6b590 (diff)
downloadop-kernel-dev-8757b7764f13e336f3c0eb1f634440d4ee4c3a67.zip
op-kernel-dev-8757b7764f13e336f3c0eb1f634440d4ee4c3a67.tar.gz
[PATCH] dm table: add target preresume
This patch adds a target preresume hook. It is called before the targets are resumed and if it returns an error the resume gets cancelled. The crypt target will use this to indicate that it is unable to process I/O because no encryption key has been supplied. Signed-off-by: Milan Broz <mbroz@redhat.com> Signed-off-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/md/dm-table.c')
-rw-r--r--drivers/md/dm-table.c17
1 files changed, 15 insertions, 2 deletions
diff --git a/drivers/md/dm-table.c b/drivers/md/dm-table.c
index 75fe949..47412ae 100644
--- a/drivers/md/dm-table.c
+++ b/drivers/md/dm-table.c
@@ -939,9 +939,20 @@ void dm_table_postsuspend_targets(struct dm_table *t)
return suspend_targets(t, 1);
}
-void dm_table_resume_targets(struct dm_table *t)
+int dm_table_resume_targets(struct dm_table *t)
{
- int i;
+ int i, r = 0;
+
+ for (i = 0; i < t->num_targets; i++) {
+ struct dm_target *ti = t->targets + i;
+
+ if (!ti->type->preresume)
+ continue;
+
+ r = ti->type->preresume(ti);
+ if (r)
+ return r;
+ }
for (i = 0; i < t->num_targets; i++) {
struct dm_target *ti = t->targets + i;
@@ -949,6 +960,8 @@ void dm_table_resume_targets(struct dm_table *t)
if (ti->type->resume)
ti->type->resume(ti);
}
+
+ return 0;
}
int dm_table_any_congested(struct dm_table *t, int bdi_bits)
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