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authorMikulas Patocka <mpatocka@redhat.com>2009-12-10 23:52:02 +0000
committerAlasdair G Kergon <agk@redhat.com>2009-12-10 23:52:02 +0000
commitc0da3748b9a894b9f9b561ecc2d090a913988a0f (patch)
tree85213c004d3b39dae3d64ab8e4a641958421b231 /drivers
parent076010e2e6ea5b66dfd1f81a6133fb014c9b291d (diff)
downloadop-kernel-dev-c0da3748b9a894b9f9b561ecc2d090a913988a0f.zip
op-kernel-dev-c0da3748b9a894b9f9b561ecc2d090a913988a0f.tar.gz
dm raid1: implement mirror_flush
Implement flush callee. It uses dm_io to send zero-size barrier synchronously and concurrently to all the mirror legs. Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/md/dm-raid1.c37
1 files changed, 36 insertions, 1 deletions
diff --git a/drivers/md/dm-raid1.c b/drivers/md/dm-raid1.c
index d44bc49..751660b 100644
--- a/drivers/md/dm-raid1.c
+++ b/drivers/md/dm-raid1.c
@@ -237,6 +237,40 @@ out:
schedule_work(&ms->trigger_event);
}
+static int mirror_flush(struct dm_target *ti)
+{
+ struct mirror_set *ms = ti->private;
+ unsigned long error_bits;
+
+ unsigned int i;
+ struct dm_io_region io[ms->nr_mirrors];
+ struct mirror *m;
+ struct dm_io_request io_req = {
+ .bi_rw = WRITE_BARRIER,
+ .mem.type = DM_IO_KMEM,
+ .mem.ptr.bvec = NULL,
+ .client = ms->io_client,
+ };
+
+ for (i = 0, m = ms->mirror; i < ms->nr_mirrors; i++, m++) {
+ io[i].bdev = m->dev->bdev;
+ io[i].sector = 0;
+ io[i].count = 0;
+ }
+
+ error_bits = -1;
+ dm_io(&io_req, ms->nr_mirrors, io, &error_bits);
+ if (unlikely(error_bits != 0)) {
+ for (i = 0; i < ms->nr_mirrors; i++)
+ if (test_bit(i, &error_bits))
+ fail_mirror(ms->mirror + i,
+ DM_RAID1_WRITE_ERROR);
+ return -EIO;
+ }
+
+ return 0;
+}
+
/*-----------------------------------------------------------------
* Recovery.
*
@@ -896,7 +930,8 @@ static struct dm_dirty_log *create_dirty_log(struct dm_target *ti,
return NULL;
}
- dl = dm_dirty_log_create(argv[0], ti, NULL, param_count, argv + 2);
+ dl = dm_dirty_log_create(argv[0], ti, mirror_flush, param_count,
+ argv + 2);
if (!dl) {
ti->error = "Error creating mirror dirty log";
return NULL;
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