projects / people / ummeegge / ipfire-2.x.git / blame
| Commit | Line | Data |
|---|---|---|
| 2cb7cef9 BS |
1 | From: Hannes Reinecke <hare@suse.de> |
| 2 | Subject: Disable partitions scan for multipathed devices | |
| 3 | References: bnc#402922,bnc#514767 | |
| 4 | ||
| 5 | When multipath devices are being used as disks for VM Guests | |
| 6 | any partition scanning / setup should be done within the VM Guest, | |
| 7 | not from host. So we need to switch off partitions scanning via | |
| 8 | kpartx there. | |
| 9 | For this I've implemented a new feature 'no_partitions' which | |
| 10 | just serves as a notifier to kpartx to _not_ create partitions | |
| 11 | on these devices. | |
| 12 | ||
| 13 | Patch ported to SLES11. | |
| 14 | ||
| 15 | Signed-off-by: Hannes Reinecke <hare@suse.de> | |
| 16 | ||
| 17 | --- | |
| 18 | drivers/md/dm-mpath.c | 12 +++++++++++- | |
| 19 | 1 file changed, 11 insertions(+), 1 deletion(-) | |
| 20 | ||
| 21 | --- a/drivers/md/dm-mpath.c | |
| 22 | +++ b/drivers/md/dm-mpath.c | |
| 23 | @@ -55,6 +55,8 @@ struct priority_group { | |
| 24 | struct list_head pgpaths; | |
| 25 | }; | |
| 26 | ||
| 27 | +#define FEATURE_NO_PARTITIONS 1 | |
| 28 | + | |
| 29 | /* Multipath context */ | |
| 30 | struct multipath { | |
| 31 | struct list_head list; | |
| 32 | @@ -79,6 +81,7 @@ struct multipath { | |
| 33 | unsigned saved_queue_if_no_path;/* Saved state during suspension */ | |
| 34 | unsigned pg_init_retries; /* Number of times to retry pg_init */ | |
| 35 | unsigned pg_init_count; /* Number of times pg_init called */ | |
| 36 | + unsigned features; /* Additional selected features */ | |
| 37 | ||
| 38 | struct work_struct process_queued_ios; | |
| 39 | struct list_head queued_ios; | |
| 40 | @@ -802,6 +805,10 @@ static int parse_features(struct arg_set | |
| 41 | continue; | |
| 42 | } | |
| 43 | ||
| 44 | + if (!strnicmp(param_name, MESG_STR("no_partitions"))) { | |
| 45 | + m->features |= FEATURE_NO_PARTITIONS; | |
| 46 | + continue; | |
| 47 | + } | |
| 48 | if (!strnicmp(param_name, MESG_STR("pg_init_retries")) && | |
| 49 | (argc >= 1)) { | |
| 50 | r = read_param(_params + 1, shift(as), | |
| 51 | @@ -1321,11 +1328,14 @@ static int multipath_status(struct dm_ta | |
| 52 | DMEMIT("2 %u %u ", m->queue_size, m->pg_init_count); | |
| 53 | else { | |
| 54 | DMEMIT("%u ", m->queue_if_no_path + | |
| 55 | - (m->pg_init_retries > 0) * 2); | |
| 56 | + (m->pg_init_retries > 0) * 2 + | |
| 57 | + (m->features & FEATURE_NO_PARTITIONS)); | |
| 58 | if (m->queue_if_no_path) | |
| 59 | DMEMIT("queue_if_no_path "); | |
| 60 | if (m->pg_init_retries) | |
| 61 | DMEMIT("pg_init_retries %u ", m->pg_init_retries); | |
| 62 | + if (m->features & FEATURE_NO_PARTITIONS) | |
| 63 | + DMEMIT("no_partitions "); | |
| 64 | } | |
| 65 | ||
| 66 | if (!m->hw_handler_name || type == STATUSTYPE_INFO) |