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[PATCH] md: remove the working_disks and failed_disks from raid5 state data.

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They are not needed.  conf->failed_disks is the same as mddev->degraded and
conf->working_disks is conf->raid_disks - mddev->degraded.

Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
NeilBrown 2006-10-03 01:15:47 -07:00 committed by Linus Torvalds
parent 850b2b420c
commit 02c2de8cc8
2 changed files with 9 additions and 13 deletions
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20
drivers/md/raid5.c
View File

@ -698,9 +698,7 @@ static void error(mddev_t *mddev, mdk_rdev_t *rdev)
if (!test_bit(Faulty, &rdev->flags)) {
set_bit(MD_CHANGE_DEVS, &mddev->flags);
if (test_bit(In_sync, &rdev->flags)) {
conf->working_disks--;
mddev->degraded++;
conf->failed_disks++;
clear_bit(In_sync, &rdev->flags);
/*
* if recovery was running, make sure it aborts.
@ -711,7 +709,7 @@ static void error(mddev_t *mddev, mdk_rdev_t *rdev)
printk (KERN_ALERT
"raid5: Disk failure on %s, disabling device."
" Operation continuing on %d devices\n",
bdevname(rdev->bdev,b), conf->working_disks);
bdevname(rdev->bdev,b), conf->raid_disks - mddev->degraded);
}
}
@ -3074,6 +3072,7 @@ static int run(mddev_t *mddev)
mdk_rdev_t *rdev;
struct disk_info *disk;
struct list_head *tmp;
int working_disks = 0;
if (mddev->level != 5 && mddev->level != 4 && mddev->level != 6) {
printk(KERN_ERR "raid5: %s: raid level not set to 4/5/6 (%d)\n",
@ -3176,14 +3175,14 @@ static int run(mddev_t *mddev)
printk(KERN_INFO "raid5: device %s operational as raid"
" disk %d\n", bdevname(rdev->bdev,b),
raid_disk);
conf->working_disks++;
working_disks++;
}
}
/*
* 0 for a fully functional array, 1 or 2 for a degraded array.
*/
mddev->degraded = conf->failed_disks = conf->raid_disks - conf->working_disks;
mddev->degraded = conf->raid_disks - working_disks;
conf->mddev = mddev;
conf->chunk_size = mddev->chunk_size;
conf->level = mddev->level;
@ -3218,7 +3217,7 @@ static int run(mddev_t *mddev)
if (mddev->degraded > conf->max_degraded) {
printk(KERN_ERR "raid5: not enough operational devices for %s"
" (%d/%d failed)\n",
mdname(mddev), conf->failed_disks, conf->raid_disks);
mdname(mddev), mddev->degraded, conf->raid_disks);
goto abort;
}
@ -3375,7 +3374,7 @@ static void status (struct seq_file *seq, mddev_t *mddev)
int i;
seq_printf (seq, " level %d, %dk chunk, algorithm %d", mddev->level, mddev->chunk_size >> 10, mddev->layout);
seq_printf (seq, " [%d/%d] [", conf->raid_disks, conf->working_disks);
seq_printf (seq, " [%d/%d] [", conf->raid_disks, conf->raid_disks - mddev->degraded);
for (i = 0; i < conf->raid_disks; i++)
seq_printf (seq, "%s",
conf->disks[i].rdev &&
@ -3397,8 +3396,8 @@ static void print_raid5_conf (raid5_conf_t *conf)
printk("(conf==NULL)\n");
return;
}
printk(" --- rd:%d wd:%d fd:%d\n", conf->raid_disks,
conf->working_disks, conf->failed_disks);
printk(" --- rd:%d wd:%d\n", conf->raid_disks,
conf->raid_disks - conf->mddev->degraded);
for (i = 0; i < conf->raid_disks; i++) {
char b[BDEVNAME_SIZE];
@ -3422,8 +3421,6 @@ static int raid5_spare_active(mddev_t *mddev)
&& !test_bit(Faulty, &tmp->rdev->flags)
&& !test_bit(In_sync, &tmp->rdev->flags)) {
mddev->degraded--;
conf->failed_disks--;
conf->working_disks++;
set_bit(In_sync, &tmp->rdev->flags);
}
}
@ -3593,7 +3590,6 @@ static int raid5_start_reshape(mddev_t *mddev)
if (raid5_add_disk(mddev, rdev)) {
char nm[20];
set_bit(In_sync, &rdev->flags);
conf->working_disks++;
added_devices++;
rdev->recovery_offset = 0;
sprintf(nm, "rd%d", rdev->raid_disk);

2
include/linux/raid/raid5.h
View File

@ -214,7 +214,7 @@ struct raid5_private_data {
struct disk_info *spare;
int chunk_size, level, algorithm;
int max_degraded;
int raid_disks, working_disks, failed_disks;
int raid_disks;
int max_nr_stripes;
/* used during an expand */