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md/raid10: print more useful messages on device failure.

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When we get a read error on a device in a RAID10, and attempting to
repair the error fails, print more useful messages about why it
failed.

Signed-off-by: Robert Becker <Rob.Becker@riverbed.com>
Signed-off-by: NeilBrown <neilb@suse.de>
This commit is contained in:
Robert Becker 2009-12-14 12:49:57 +11:00 • committed by NeilBrown
parent ffa23322b1
commit 67b8dc4b06
1 changed files with 29 additions and 3 deletions
Download patch file Download diff file Expand all files Collapse all files

32
drivers/md/raid10.c
View file

@ -1488,6 +1488,7 @@ static void fix_read_error(conf_t *conf, mddev_t *mddev, r10bio_t *r10_bio)
/* write it back and re-read */ /* write it back and re-read */
rcu_read_lock(); rcu_read_lock();
while (sl != r10_bio->read_slot) { while (sl != r10_bio->read_slot) {
char b[BDEVNAME_SIZE];
int d; int d;
if (sl==0) if (sl==0)
sl = conf->copies; sl = conf->copies;
@ -1503,9 +1504,21 @@ static void fix_read_error(conf_t *conf, mddev_t *mddev, r10bio_t *r10_bio)
r10_bio->devs[sl].addr + r10_bio->devs[sl].addr +
sect + rdev->data_offset, sect + rdev->data_offset,
s<<9, conf->tmppage, WRITE) s<<9, conf->tmppage, WRITE)
== 0) == 0) {
/* Well, this device is dead */ /* Well, this device is dead */
printk(KERN_NOTICE
"raid10:%s: read correction "
"write failed"
" (%d sectors at %llu on %s)\n",
mdname(mddev), s,
(unsigned long long)(sect+
rdev->data_offset),
bdevname(rdev->bdev, b));
printk(KERN_NOTICE "raid10:%s: failing "
"drive\n",
bdevname(rdev->bdev, b));
md_error(mddev, rdev); md_error(mddev, rdev);
}
rdev_dec_pending(rdev, mddev); rdev_dec_pending(rdev, mddev);
rcu_read_lock(); rcu_read_lock();
} }
@ -1526,10 +1539,22 @@ static void fix_read_error(conf_t *conf, mddev_t *mddev, r10bio_t *r10_bio)
if (sync_page_io(rdev->bdev, if (sync_page_io(rdev->bdev,
r10_bio->devs[sl].addr + r10_bio->devs[sl].addr +
sect + rdev->data_offset, sect + rdev->data_offset,
s<<9, conf->tmppage, READ) == 0) s<<9, conf->tmppage,
READ) == 0) {
/* Well, this device is dead */ /* Well, this device is dead */
printk(KERN_NOTICE
"raid10:%s: unable to read back "
"corrected sectors"
" (%d sectors at %llu on %s)\n",
mdname(mddev), s,
(unsigned long long)(sect+
rdev->data_offset),
bdevname(rdev->bdev, b));
printk(KERN_NOTICE "raid10:%s: failing drive\n",
bdevname(rdev->bdev, b));
md_error(mddev, rdev); md_error(mddev, rdev);
else } else {
printk(KERN_INFO printk(KERN_INFO
"raid10:%s: read error corrected" "raid10:%s: read error corrected"
" (%d sectors at %llu on %s)\n", " (%d sectors at %llu on %s)\n",
@ -1537,6 +1562,7 @@ static void fix_read_error(conf_t *conf, mddev_t *mddev, r10bio_t *r10_bio)
(unsigned long long)(sect+ (unsigned long long)(sect+
rdev->data_offset), rdev->data_offset),
bdevname(rdev->bdev, b)); bdevname(rdev->bdev, b));
}
rdev_dec_pending(rdev, mddev); rdev_dec_pending(rdev, mddev);
rcu_read_lock(); rcu_read_lock();