UbiquitousOS
/
OpenCloudOS-Kernel
mirror of https://gitee.com/OpenCloudOS/OpenCloudOS-Kernel.git
11
0
Fork 0
Code Issues Projects Releases Wiki Activity

dm raid: validate current raid sets redundancy 

Verifying the current raid sets redundancy based on retrieved
superblock content has to use the superblock's raid level (e.g. raid0),
not the constructor requested one (e.g. raid10).

Using the requested raid level of raid10 lead to a "divide error"
on raid0 which defines data copies divided by to be zero.

Also check for bogus data copies.

Signed-off-by: Heinz Mauelshagen <heinzm@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
This commit is contained in:
Heinz Mauelshagen 2017-12-13 17:13:17 +01:00 committed by Mike Snitzer
parent b84cf26924
commit 53bf5384f9
1 changed files with 6 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
drivers/md/dm-raid.c
View File

@ -1007,7 +1007,7 @@ static int validate_raid_redundancy(struct raid_set *rs)
!rs->dev[i].rdev.sb_page)
rebuild_cnt++;
switch (rs->raid_type->level) {
switch (rs->md.level) {
case 0:
break;
case 1:
@ -1022,6 +1022,11 @@ static int validate_raid_redundancy(struct raid_set *rs)
break;
case 10:
copies = raid10_md_layout_to_copies(rs->md.new_layout);
if (copies < 2) {
DMERR("Bogus raid10 data copies < 2!");
return -EINVAL;
}
if (rebuild_cnt < copies)
break;