|
 |
2ad819 |
From fc6fd4063769f4194c3fb8f77b32b2819e140fb9 Mon Sep 17 00:00:00 2001
|
|
|
2ad819 |
From: Mateusz Kusiak <mateusz.kusiak@intel.com>
|
|
|
2ad819 |
Date: Thu, 18 Aug 2022 11:47:21 +0200
|
|
|
2ad819 |
Subject: [PATCH 55/83] Manage: Block unsafe member failing
|
|
|
2ad819 |
|
|
|
2ad819 |
Kernel may or may not block mdadm from removing member device if it
|
|
|
2ad819 |
will cause arrays failed state. It depends on raid personality
|
|
|
2ad819 |
implementation in kernel.
|
|
|
2ad819 |
Add verification on requested removal path (#mdadm --set-faulty
|
|
|
2ad819 |
command).
|
|
|
2ad819 |
|
|
|
2ad819 |
Signed-off-by: Mateusz Kusiak <mateusz.kusiak@intel.com>
|
|
|
2ad819 |
Signed-off-by: Jes Sorensen <jsorensen@fb.com>
|
|
|
2ad819 |
---
|
|
|
2ad819 |
Manage.c | 53 ++++++++++++++++++++++++++++++++++++++++++++++++++++-
|
|
|
2ad819 |
1 file changed, 52 insertions(+), 1 deletion(-)
|
|
|
2ad819 |
|
|
|
2ad819 |
diff --git a/Manage.c b/Manage.c
|
|
|
2ad819 |
index a142f8bd..b1d0e630 100644
|
|
|
2ad819 |
--- a/Manage.c
|
|
|
2ad819 |
+++ b/Manage.c
|
|
|
2ad819 |
@@ -1285,6 +1285,50 @@ int Manage_with(struct supertype *tst, int fd, struct mddev_dev *dv,
|
|
|
2ad819 |
return -1;
|
|
|
2ad819 |
}
|
|
|
2ad819 |
|
|
|
2ad819 |
+/**
|
|
|
2ad819 |
+ * is_remove_safe() - Check if remove is safe.
|
|
|
2ad819 |
+ * @array: Array info.
|
|
|
2ad819 |
+ * @fd: Array file descriptor.
|
|
|
2ad819 |
+ * @devname: Name of device to remove.
|
|
|
2ad819 |
+ * @verbose: Verbose.
|
|
|
2ad819 |
+ *
|
|
|
2ad819 |
+ * The function determines if array will be operational
|
|
|
2ad819 |
+ * after removing &devname.
|
|
|
2ad819 |
+ *
|
|
|
2ad819 |
+ * Return: True if array will be operational, false otherwise.
|
|
|
2ad819 |
+ */
|
|
|
2ad819 |
+bool is_remove_safe(mdu_array_info_t *array, const int fd, char *devname, const int verbose)
|
|
|
2ad819 |
+{
|
|
|
2ad819 |
+ dev_t devid = devnm2devid(devname + 5);
|
|
|
2ad819 |
+ struct mdinfo *mdi = sysfs_read(fd, NULL, GET_DEVS | GET_DISKS | GET_STATE);
|
|
|
2ad819 |
+
|
|
|
2ad819 |
+ if (!mdi) {
|
|
|
2ad819 |
+ if (verbose)
|
|
|
2ad819 |
+ pr_err("Failed to read sysfs attributes for %s\n", devname);
|
|
|
2ad819 |
+ return false;
|
|
|
2ad819 |
+ }
|
|
|
2ad819 |
+
|
|
|
2ad819 |
+ char *avail = xcalloc(array->raid_disks, sizeof(char));
|
|
|
2ad819 |
+
|
|
|
2ad819 |
+ for (mdi = mdi->devs; mdi; mdi = mdi->next) {
|
|
|
2ad819 |
+ if (mdi->disk.raid_disk < 0)
|
|
|
2ad819 |
+ continue;
|
|
|
2ad819 |
+ if (!(mdi->disk.state & (1 << MD_DISK_SYNC)))
|
|
|
2ad819 |
+ continue;
|
|
|
2ad819 |
+ if (makedev(mdi->disk.major, mdi->disk.minor) == devid)
|
|
|
2ad819 |
+ continue;
|
|
|
2ad819 |
+ avail[mdi->disk.raid_disk] = 1;
|
|
|
2ad819 |
+ }
|
|
|
2ad819 |
+ sysfs_free(mdi);
|
|
|
2ad819 |
+
|
|
|
2ad819 |
+ bool is_enough = enough(array->level, array->raid_disks,
|
|
|
2ad819 |
+ array->layout, (array->state & 1),
|
|
|
2ad819 |
+ avail);
|
|
|
2ad819 |
+
|
|
|
2ad819 |
+ free(avail);
|
|
|
2ad819 |
+ return is_enough;
|
|
|
2ad819 |
+}
|
|
|
2ad819 |
+
|
|
|
2ad819 |
int Manage_subdevs(char *devname, int fd,
|
|
|
2ad819 |
struct mddev_dev *devlist, int verbose, int test,
|
|
|
2ad819 |
char *update, int force)
|
|
|
2ad819 |
@@ -1598,7 +1642,14 @@ int Manage_subdevs(char *devname, int fd,
|
|
|
2ad819 |
break;
|
|
|
2ad819 |
|
|
|
2ad819 |
case 'f': /* set faulty */
|
|
|
2ad819 |
- /* FIXME check current member */
|
|
|
2ad819 |
+ if (!is_remove_safe(&array, fd, dv->devname, verbose)) {
|
|
|
2ad819 |
+ pr_err("Cannot remove %s from %s, array will be failed.\n",
|
|
|
2ad819 |
+ dv->devname, devname);
|
|
|
2ad819 |
+ if (sysfd >= 0)
|
|
|
2ad819 |
+ close(sysfd);
|
|
|
2ad819 |
+ goto abort;
|
|
|
2ad819 |
+ }
|
|
|
2ad819 |
+
|
|
|
2ad819 |
if ((sysfd >= 0 && write(sysfd, "faulty", 6) != 6) ||
|
|
|
2ad819 |
(sysfd < 0 && ioctl(fd, SET_DISK_FAULTY,
|
|
|
2ad819 |
rdev))) {
|
|
|
2ad819 |
--
|
|
|
2ad819 |
2.38.1
|
|
|
2ad819 |
|