luck/tmp_suning_uos_patched
1
0
Fork 1
Code Issues Pull Requests Packages Projects Releases Wiki Activity

md: correctly update sysfs when a raid1 is reshaped

Browse Source 
When a raid1 array is reshaped (number of drives changed), the list of devices
is compacted, so that slots for missing devices are filled with working
devices from later slots.  This requires the "rd%d" symlinks in sysfs to be
updated.

Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
NeilBrown 2007-08-22 14:01:53 -07:00 committed by Linus Torvalds
parent 918f02383f
commit a88aa7865b
1 changed files with 18 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

22
drivers/md/raid1.c
View File

@ -2154,11 +2154,25 @@ static int raid1_reshape(mddev_t *mddev)
oldpool = conf->r1bio_pool;
conf->r1bio_pool = newpool;
for (d=d2=0; d < conf->raid_disks; d++)
if (conf->mirrors[d].rdev) {
conf->mirrors[d].rdev->raid_disk = d2;
newmirrors[d2++].rdev = conf->mirrors[d].rdev;
for (d = d2 = 0; d < conf->raid_disks; d++) {
mdk_rdev_t *rdev = conf->mirrors[d].rdev;
if (rdev && rdev->raid_disk != d2) {
char nm[20];
sprintf(nm, "rd%d", rdev->raid_disk);
sysfs_remove_link(&mddev->kobj, nm);
rdev->raid_disk = d2;
sprintf(nm, "rd%d", rdev->raid_disk);
sysfs_remove_link(&mddev->kobj, nm);
if (sysfs_create_link(&mddev->kobj,
&rdev->kobj, nm))
printk(KERN_WARNING
"md/raid1: cannot register "
"%s for %s\n",
nm, mdname(mddev));
}
if (rdev)
newmirrors[d2++].rdev = rdev;
}
kfree(conf->mirrors);
conf->mirrors = newmirrors;
kfree(conf->poolinfo);