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md-cluster: check for timeout while a new disk adding

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A new disk adding may end up with timeout and a new disk won't be added.
Add returning the error in that case.

Found by Linux Verification Center (linuxtesting.org) with SVACE

Signed-off-by: Denis Plotnikov <den-plotnikov@yandex-team.ru>
Signed-off-by: Song Liu <song@kernel.org>
Link: https://lore.kernel.org/r/20230925125940.1542506-1-den-plotnikov@yandex-team.ru
This commit is contained in:
Denis Plotnikov 2023-09-25 15:59:40 +03:00 committed by Song Liu
parent 9164e4a5af
commit 1bbe254e43
1 changed files with 11 additions and 4 deletions
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15
drivers/md/md-cluster.c
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@ -501,7 +501,7 @@ static void process_suspend_info(struct mddev *mddev,
mddev->pers->quiesce(mddev, 0);
}
static void process_add_new_disk(struct mddev *mddev, struct cluster_msg *cmsg)
static int process_add_new_disk(struct mddev *mddev, struct cluster_msg *cmsg)
{
char disk_uuid[64];
struct md_cluster_info *cinfo = mddev->cluster_info;
@ -509,6 +509,7 @@ static void process_add_new_disk(struct mddev *mddev, struct cluster_msg *cmsg)
char raid_slot[16];
char *envp[] = {event_name, disk_uuid, raid_slot, NULL};
int len;
int res = 0;
len = snprintf(disk_uuid, 64, "DEVICE_UUID=");
sprintf(disk_uuid + len, "%pU", cmsg->uuid);
@ -517,9 +518,14 @@ static void process_add_new_disk(struct mddev *mddev, struct cluster_msg *cmsg)
init_completion(&cinfo->newdisk_completion);
set_bit(MD_CLUSTER_WAITING_FOR_NEWDISK, &cinfo->state);
kobject_uevent_env(&disk_to_dev(mddev->gendisk)->kobj, KOBJ_CHANGE, envp);
wait_for_completion_timeout(&cinfo->newdisk_completion,
NEW_DEV_TIMEOUT);
if (!wait_for_completion_timeout(&cinfo->newdisk_completion,
NEW_DEV_TIMEOUT)) {
pr_err("md-cluster(%s:%d): timeout on a new disk adding\n",
__func__, __LINE__);
res = -1;
}
clear_bit(MD_CLUSTER_WAITING_FOR_NEWDISK, &cinfo->state);
return res;
}
@ -594,7 +600,8 @@ static int process_recvd_msg(struct mddev *mddev, struct cluster_msg *msg)
le64_to_cpu(msg->high));
break;
case NEWDISK:
process_add_new_disk(mddev, msg);
if (process_add_new_disk(mddev, msg))
ret = -1;
break;
case REMOVE:
process_remove_disk(mddev, msg);