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Fix ZED auto-replace for VDEVs using by-id paths

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The change is simple -- restore the original code so that the VDEV 
path is updated when using by-id paths.  The more challenging part 
was to devise a second ZTS test, that would test auto-replace for 
'by-id' and help prevent a future regression.

With that new test, we can now do an A|B test with , and without, 
the fix to confirm that auto-replace for by-id paths works. The 
existing auto-replace test, functional/fault/auto_replace_001_pos, 
will confirm that we didn't break auto-replace for 'by-vdev' paths.

In the original functional/fault/auto_replace_001_pos test, the disk 
wipe (using dd) was not effective in removing the partitioning since 
the kernel was never informed of the wipe.

Added a call to wipefs(8) so that the kernel is informed and ZED will 
re-partition the device.
    
Added a validation step that the re-partitioning occurred by
confirming  that the GPT partition UUID changes.

Sponsored-By: OpenDrives Inc.
Sponsored-By: Klara Inc.
Reviewed-by: Rob Norris <rob.norris@klarasystems.com>
Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Signed-off-by: Don Brady <don.brady@klarasystems.com>
Closes #15363
This commit is contained in:
Don Brady
2023-10-20 10:29:02 -06:00
committed by GitHub
parent c0e58995e3
commit f0f330e121
9 changed files with 279 additions and 35 deletions
Download Patch File Download Diff File Expand all files Collapse all files
cmd/zed/agents/zfs_mod.c
+37 -18
View File
@@ -24,6 +24,7 @@
* Copyright 2014 Nexenta Systems, Inc. All rights reserved.
* Copyright (c) 2016, 2017, Intel Corporation.
* Copyright (c) 2017 Open-E, Inc. All Rights Reserved.
* Copyright (c) 2023, Klara Inc.
*/
/*
@@ -204,7 +205,7 @@ zfs_process_add(zpool_handle_t *zhp, nvlist_t *vdev, boolean_t labeled)
uint64_t is_spare = 0;
const char *physpath = NULL, *new_devid = NULL, *enc_sysfs_path = NULL;
char rawpath[PATH_MAX], fullpath[PATH_MAX];
char devpath[PATH_MAX];
char pathbuf[PATH_MAX];
int ret;
int online_flag = ZFS_ONLINE_CHECKREMOVE | ZFS_ONLINE_UNSPARE;
boolean_t is_sd = B_FALSE;
@@ -214,6 +215,11 @@ zfs_process_add(zpool_handle_t *zhp, nvlist_t *vdev, boolean_t labeled)
char **lines = NULL;
int lines_cnt = 0;
/*
* Get the persistent path, typically under the '/dev/disk/by-id' or
* '/dev/disk/by-vdev' directories. Note that this path can change
* when a vdev is replaced with a new disk.
*/
if (nvlist_lookup_string(vdev, ZPOOL_CONFIG_PATH, &path) != 0)
return;
@@ -370,15 +376,17 @@ zfs_process_add(zpool_handle_t *zhp, nvlist_t *vdev, boolean_t labeled)
(void) snprintf(rawpath, sizeof (rawpath), "%s%s",
is_sd ? DEV_BYVDEV_PATH : DEV_BYPATH_PATH, physpath);
if (realpath(rawpath, devpath) == NULL && !is_mpath_wholedisk) {
if (realpath(rawpath, pathbuf) == NULL && !is_mpath_wholedisk) {
zed_log_msg(LOG_INFO, " realpath: %s failed (%s)",
rawpath, strerror(errno));
(void) zpool_vdev_online(zhp, fullpath, ZFS_ONLINE_FORCEFAULT,
&newstate);
int err = zpool_vdev_online(zhp, fullpath,
ZFS_ONLINE_FORCEFAULT, &newstate);
zed_log_msg(LOG_INFO, " zpool_vdev_online: %s FORCEFAULT (%s)",
fullpath, libzfs_error_description(g_zfshdl));
zed_log_msg(LOG_INFO, " zpool_vdev_online: %s FORCEFAULT (%s) "
"err %d, new state %d",
fullpath, libzfs_error_description(g_zfshdl), err,
err ? (int)newstate : 0);
return;
}
@@ -428,7 +436,7 @@ zfs_process_add(zpool_handle_t *zhp, nvlist_t *vdev, boolean_t labeled)
* to trigger a ZFS fault for the device (and any hot spare
* replacement).
*/
leafname = strrchr(devpath, '/') + 1;
leafname = strrchr(pathbuf, '/') + 1;
/*
* If this is a request to label a whole disk, then attempt to
@@ -436,7 +444,7 @@ zfs_process_add(zpool_handle_t *zhp, nvlist_t *vdev, boolean_t labeled)
*/
if (zpool_prepare_and_label_disk(g_zfshdl, zhp, leafname,
vdev, "autoreplace", &lines, &lines_cnt) != 0) {
zed_log_msg(LOG_INFO,
zed_log_msg(LOG_WARNING,
" zpool_prepare_and_label_disk: could not "
"label '%s' (%s)", leafname,
libzfs_error_description(g_zfshdl));
@@ -468,7 +476,7 @@ zfs_process_add(zpool_handle_t *zhp, nvlist_t *vdev, boolean_t labeled)
sizeof (device->pd_physpath));
list_insert_tail(&g_device_list, device);
zed_log_msg(LOG_INFO, " zpool_label_disk: async '%s' (%llu)",
zed_log_msg(LOG_NOTICE, " zpool_label_disk: async '%s' (%llu)",
leafname, (u_longlong_t)guid);
return; /* resumes at EC_DEV_ADD.ESC_DISK for partition */
@@ -491,8 +499,8 @@ zfs_process_add(zpool_handle_t *zhp, nvlist_t *vdev, boolean_t labeled)
}
if (!found) {
/* unexpected partition slice encountered */
zed_log_msg(LOG_INFO, "labeled disk %s unexpected here",
fullpath);
zed_log_msg(LOG_WARNING, "labeled disk %s was "
"unexpected here", fullpath);
(void) zpool_vdev_online(zhp, fullpath,
ZFS_ONLINE_FORCEFAULT, &newstate);
return;
@@ -501,8 +509,17 @@ zfs_process_add(zpool_handle_t *zhp, nvlist_t *vdev, boolean_t labeled)
zed_log_msg(LOG_INFO, " zpool_label_disk: resume '%s' (%llu)",
physpath, (u_longlong_t)guid);
(void) snprintf(devpath, sizeof (devpath), "%s%s",
DEV_BYID_PATH, new_devid);
/*
* Paths that begin with '/dev/disk/by-id/' will change and so
* they must be updated before calling zpool_vdev_attach().
*/
if (strncmp(path, DEV_BYID_PATH, strlen(DEV_BYID_PATH)) == 0) {
(void) snprintf(pathbuf, sizeof (pathbuf), "%s%s",
DEV_BYID_PATH, new_devid);
zed_log_msg(LOG_INFO, " zpool_label_disk: path '%s' "
"replaced by '%s'", path, pathbuf);
path = pathbuf;
}
}
libzfs_free_str_array(lines, lines_cnt);
@@ -545,9 +562,11 @@ zfs_process_add(zpool_handle_t *zhp, nvlist_t *vdev, boolean_t labeled)
* Wait for udev to verify the links exist, then auto-replace
* the leaf disk at same physical location.
*/
if (zpool_label_disk_wait(path, 3000) != 0) {
zed_log_msg(LOG_WARNING, "zfs_mod: expected replacement "
"disk %s is missing", path);
if (zpool_label_disk_wait(path, DISK_LABEL_WAIT) != 0) {
zed_log_msg(LOG_WARNING, "zfs_mod: pool '%s', after labeling "
"replacement disk, the expected disk partition link '%s' "
"is missing after waiting %u ms",
zpool_get_name(zhp), path, DISK_LABEL_WAIT);
nvlist_free(nvroot);
return;
}
@@ -562,7 +581,7 @@ zfs_process_add(zpool_handle_t *zhp, nvlist_t *vdev, boolean_t labeled)
B_TRUE, B_FALSE);
}
zed_log_msg(LOG_INFO, " zpool_vdev_replace: %s with %s (%s)",
zed_log_msg(LOG_WARNING, " zpool_vdev_replace: %s with %s (%s)",
fullpath, path, (ret == 0) ? "no errors" :
libzfs_error_description(g_zfshdl));
@@ -660,7 +679,7 @@ zfs_iter_vdev(zpool_handle_t *zhp, nvlist_t *nvl, void *data)
dp->dd_prop, path);
dp->dd_found = B_TRUE;
/* pass the new devid for use by replacing code */
/* pass the new devid for use by auto-replacing code */
if (dp->dd_new_devid != NULL) {
(void) nvlist_add_string(nvl, "new_devid",
dp->dd_new_devid);