[PATCH 5.5 050/399] dm raid: table line rebuild status fixes

Greg Kroah-Hartman
2020-02-21T07:45:31Z

From: Heinz Mauelshagen <heinzm@redhat.com>

[ Upstream commit 43f3952a51f8198d365acb7f51fe42d578fe5d0a ]

raid_status() wasn't emitting rebuild flags on the table line properly
because the rdev number was not yet set properly; index raid component
devices array directly to solve.

Also fix wrong argument count on emitted table line caused by 1 too
many rebuild/write_mostly argument and consider any journal_(dev|mode)
pairs.

Link: https://bugzilla.redhat.com/1782045
Signed-off-by: Heinz Mauelshagen <heinzm@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
.../admin-guide/device-mapper/dm-raid.rst | 2 +
drivers/md/dm-raid.c | 43 ++++++++++---------
2 files changed, 24 insertions(+), 21 deletions(-)

diff --git a/Documentation/admin-guide/device-mapper/dm-raid.rst b/Documentation/admin-guide/device-mapper/dm-raid.rst
index f6344675e3951..695a2ea1d1ae2 100644
--- a/Documentation/admin-guide/device-mapper/dm-raid.rst
+++ b/Documentation/admin-guide/device-mapper/dm-raid.rst
@@ -419,3 +419,5 @@ Version History
rebuild errors.
1.15.0 Fix size extensions not being synchronized in case of new MD bitmap
pages allocated; also fix those not occuring after previous reductions
+ 1.15.1 Fix argument count and arguments for rebuild/write_mostly/journal_(dev|mode)
+ on the status line.
diff --git a/drivers/md/dm-raid.c b/drivers/md/dm-raid.c
index c412eaa975fc0..9a18bef0a5ff0 100644
--- a/drivers/md/dm-raid.c
+++ b/drivers/md/dm-raid.c
@@ -129,7 +129,9 @@ struct raid_dev {
CTR_FLAG_RAID10_COPIES | \
CTR_FLAG_RAID10_FORMAT | \
CTR_FLAG_DELTA_DISKS | \
- CTR_FLAG_DATA_OFFSET)
+ CTR_FLAG_DATA_OFFSET | \
+ CTR_FLAG_JOURNAL_DEV | \
+ CTR_FLAG_JOURNAL_MODE)

/* Valid options definitions per raid level... */

@@ -3001,7 +3003,6 @@ static int raid_ctr(struct dm_target *ti, unsigned int argc, char **argv)
{ 1, 254, "Cannot understand number of raid devices parameters" }
};

- /* Must have <raid_type> */
arg = dm_shift_arg(&as);
if (!arg) {
ti->error = "No arguments";
@@ -3508,8 +3509,7 @@ static void raid_status(struct dm_target *ti, status_type_t type,
unsigned long recovery;
unsigned int raid_param_cnt = 1; /* at least 1 for chunksize */
unsigned int sz = 0;
- unsigned int rebuild_disks;
- unsigned int write_mostly_params = 0;
+ unsigned int rebuild_writemostly_count = 0;
sector_t progress, resync_max_sectors, resync_mismatches;
enum sync_state state;
struct raid_type *rt;
@@ -3593,18 +3593,20 @@ static void raid_status(struct dm_target *ti, status_type_t type,
case STATUSTYPE_TABLE:
/* Report the table line string you would use to construct this raid set */

- /* Calculate raid parameter count */
- for (i = 0; i < rs->raid_disks; i++)
- if (test_bit(WriteMostly, &rs->dev[i].rdev.flags))
- write_mostly_params += 2;
- rebuild_disks = memweight(rs->rebuild_disks, DISKS_ARRAY_ELEMS * sizeof(*rs->rebuild_disks));
- raid_param_cnt += rebuild_disks * 2 +
- write_mostly_params +
+ /*
+ * Count any rebuild or writemostly argument pairs and subtract the
+ * hweight count being added below of any rebuild and writemostly ctr flags.
+ */
+ for (i = 0; i < rs->raid_disks; i++) {
+ rebuild_writemostly_count += (test_bit(i, (void *) rs->rebuild_disks) ? 2 : 0) +
+ (test_bit(WriteMostly, &rs->dev[i].rdev.flags) ? 2 : 0);
+ }
+ rebuild_writemostly_count -= (test_bit(__CTR_FLAG_REBUILD, &rs->ctr_flags) ? 2 : 0) +
+ (test_bit(__CTR_FLAG_WRITE_MOSTLY, &rs->ctr_flags) ? 2 : 0);
+ /* Calculate raid parameter count based on ^ rebuild/writemostly argument counts and ctr flags set. */
+ raid_param_cnt += rebuild_writemostly_count +
hweight32(rs->ctr_flags & CTR_FLAG_OPTIONS_NO_ARGS) +
- hweight32(rs->ctr_flags & CTR_FLAG_OPTIONS_ONE_ARG) * 2 +
- (test_bit(__CTR_FLAG_JOURNAL_DEV, &rs->ctr_flags) ? 2 : 0) +
- (test_bit(__CTR_FLAG_JOURNAL_MODE, &rs->ctr_flags) ? 2 : 0);
-
+ hweight32(rs->ctr_flags & CTR_FLAG_OPTIONS_ONE_ARG) * 2;
/* Emit table line */
/* This has to be in the documented order for userspace! */
DMEMIT("%s %u %u", rs->raid_type->name, raid_param_cnt, mddev->new_chunk_sectors);
@@ -3612,11 +3614,10 @@ static void raid_status(struct dm_target *ti, status_type_t type,
DMEMIT(" %s", dm_raid_arg_name_by_flag(CTR_FLAG_SYNC));
if (test_bit(__CTR_FLAG_NOSYNC, &rs->ctr_flags))
DMEMIT(" %s", dm_raid_arg_name_by_flag(CTR_FLAG_NOSYNC));
- if (rebuild_disks)
+ if (test_bit(__CTR_FLAG_REBUILD, &rs->ctr_flags))
for (i = 0; i < rs->raid_disks; i++)
- if (test_bit(rs->dev[i].rdev.raid_disk, (void *) rs->rebuild_disks))
- DMEMIT(" %s %u", dm_raid_arg_name_by_flag(CTR_FLAG_REBUILD),
- rs->dev[i].rdev.raid_disk);
+ if (test_bit(i, (void *) rs->rebuild_disks))
+ DMEMIT(" %s %u", dm_raid_arg_name_by_flag(CTR_FLAG_REBUILD), i);
if (test_bit(__CTR_FLAG_DAEMON_SLEEP, &rs->ctr_flags))
DMEMIT(" %s %lu", dm_raid_arg_name_by_flag(CTR_FLAG_DAEMON_SLEEP),
mddev->bitmap_info.daemon_sleep);
@@ -3626,7 +3627,7 @@ static void raid_status(struct dm_target *ti, status_type_t type,
if (test_bit(__CTR_FLAG_MAX_RECOVERY_RATE, &rs->ctr_flags))
DMEMIT(" %s %d", dm_raid_arg_name_by_flag(CTR_FLAG_MAX_RECOVERY_RATE),
mddev->sync_speed_max);
- if (write_mostly_params)
+ if (test_bit(__CTR_FLAG_WRITE_MOSTLY, &rs->ctr_flags))
for (i = 0; i < rs->raid_disks; i++)
if (test_bit(WriteMostly, &rs->dev[i].rdev.flags))
DMEMIT(" %s %d", dm_raid_arg_name_by_flag(CTR_FLAG_WRITE_MOSTLY),
@@ -4029,7 +4030,7 @@ static void raid_resume(struct dm_target *ti)

static struct target_type raid_target = {
.name = "raid",
- .version = {1, 15, 0},
+ .version = {1, 15, 1},
.module = THIS_MODULE,
.ctr = raid_ctr,
.dtr = raid_dtr,
--
2.20.1