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Merge branch 'for-linus' of git://neil.brown.name/md 

* 'for-linus' of git://neil.brown.name/md:
  md: Ensure an md array never has too many devices.
  md: Fix a bug in linear.c causing which_dev() to return the wrong device.
  md: Allow read error in a single drive raid1 to be passed up.
This commit is contained in:
Linus Torvalds 2009-02-06 07:41:10 -08:00
parent 9be260a646 de01dfadf2
commit b2a740aab8
3 changed files with 19 additions and 14 deletions
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6
drivers/md/linear.c
View File

@ -25,13 +25,13 @@ static inline dev_info_t *which_dev(mddev_t *mddev, sector_t sector)
{
dev_info_t *hash;
linear_conf_t *conf = mddev_to_conf(mddev);
sector_t idx = sector >> conf->sector_shift;
/*
* sector_div(a,b) returns the remainer and sets a to a/b
*/
sector >>= conf->sector_shift;
(void)sector_div(sector, conf->spacing);
hash = conf->hash_table[sector];
(void)sector_div(idx, conf->spacing);
hash = conf->hash_table[idx];
while (sector >= hash->num_sectors + hash->start_sector)
hash++;

24
drivers/md/md.c
View File

@ -1481,6 +1481,11 @@ static int bind_rdev_to_array(mdk_rdev_t * rdev, mddev_t * mddev)
if (find_rdev_nr(mddev, rdev->desc_nr))
return -EBUSY;
}
if (mddev->max_disks && rdev->desc_nr >= mddev->max_disks) {
printk(KERN_WARNING "md: %s: array is limited to %d devices\n",
mdname(mddev), mddev->max_disks);
return -EBUSY;
}
bdevname(rdev->bdev,b);
while ( (s=strchr(b, '/')) != NULL)
*s = '!';
@ -2441,6 +2446,15 @@ static void analyze_sbs(mddev_t * mddev)
i = 0;
rdev_for_each(rdev, tmp, mddev) {
if (rdev->desc_nr >= mddev->max_disks ||
i > mddev->max_disks) {
printk(KERN_WARNING
"md: %s: %s: only %d devices permitted\n",
mdname(mddev), bdevname(rdev->bdev, b),
mddev->max_disks);
kick_rdev_from_array(rdev);
continue;
}
if (rdev != freshest)
if (super_types[mddev->major_version].
validate_super(mddev, rdev)) {
@ -4614,13 +4628,6 @@ static int hot_add_disk(mddev_t * mddev, dev_t dev)
* noticed in interrupt contexts ...
*/
if (rdev->desc_nr == mddev->max_disks) {
printk(KERN_WARNING "%s: can not hot-add to full array!\n",
mdname(mddev));
err = -EBUSY;
goto abort_unbind_export;
}
rdev->raid_disk = -1;
md_update_sb(mddev, 1);
@ -4634,9 +4641,6 @@ static int hot_add_disk(mddev_t * mddev, dev_t dev)
md_new_event(mddev);
return 0;
abort_unbind_export:
unbind_rdev_from_array(rdev);
abort_export:
export_rdev(rdev);
return err;

3
drivers/md/raid1.c
View File

@ -1640,7 +1640,8 @@ static void raid1d(mddev_t *mddev)
}
bio = r1_bio->bios[r1_bio->read_disk];
if ((disk=read_balance(conf, r1_bio)) == -1) {
if ((disk=read_balance(conf, r1_bio)) == -1 ||
disk == r1_bio->read_disk) {
printk(KERN_ALERT "raid1: %s: unrecoverable I/O"
" read error for block %llu\n",
bdevname(bio->bi_bdev,b),