diff options
| author | Mike Snitzer <snitzer@redhat.com> | 2012-07-27 15:08:00 +0100 |
|---|---|---|
| committer | Alasdair G Kergon <agk@redhat.com> | 2012-07-27 15:08:00 +0100 |
| commit | 542f90381422676544382d4071ba44a2de90a0c1 (patch) | |
| tree | 0eae6798ab2fdef68a0eb1ea5ac14f3cc3ffb740 /drivers/md/dm-raid.c | |
| parent | 1df05483d758ea43abc375869fbe06be506ba827 (diff) | |
| download | linux-542f90381422676544382d4071ba44a2de90a0c1.tar.bz2 | |
dm: support non power of two target max_io_len
Remove the restriction that limits a target's specified maximum incoming
I/O size to be a power of 2.
Rename this setting from 'split_io' to the less-ambiguous 'max_io_len'.
Change it from sector_t to uint32_t, which is plenty big enough, and
introduce a wrapper function dm_set_target_max_io_len() to set it.
Use sector_div() to process it now that it is not necessarily a power of 2.
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Diffstat (limited to 'drivers/md/dm-raid.c')
| -rw-r--r-- | drivers/md/dm-raid.c | 11 |
1 files changed, 5 insertions, 6 deletions
diff --git a/drivers/md/dm-raid.c b/drivers/md/dm-raid.c index 017c34d78d61..858a8b70811c 100644 --- a/drivers/md/dm-raid.c +++ b/drivers/md/dm-raid.c @@ -353,6 +353,7 @@ static int parse_raid_params(struct raid_set *rs, char **argv, { unsigned i, rebuild_cnt = 0; unsigned long value, region_size = 0; + sector_t max_io_len; char *key; /* @@ -522,14 +523,12 @@ static int parse_raid_params(struct raid_set *rs, char **argv, return -EINVAL; if (rs->md.chunk_sectors) - rs->ti->split_io = rs->md.chunk_sectors; + max_io_len = rs->md.chunk_sectors; else - rs->ti->split_io = region_size; + max_io_len = region_size; - if (rs->md.chunk_sectors) - rs->ti->split_io = rs->md.chunk_sectors; - else - rs->ti->split_io = region_size; + if (dm_set_target_max_io_len(rs->ti, max_io_len)) + return -EINVAL; /* Assume there are no metadata devices until the drives are parsed */ rs->md.persistent = 0; |