|
 |
a1c519 |
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
|
|
|
a1c519 |
From: Benjamin Marzinski <bmarzins@redhat.com>
|
|
|
a1c519 |
Date: Wed, 20 Feb 2019 17:05:08 -0600
|
|
|
a1c519 |
Subject: [PATCH] multipathd: ignore failed wwid recheck
|
|
|
a1c519 |
|
|
|
a1c519 |
If disable_changed_wwids is set, when multipathd gets a change event on
|
|
|
a1c519 |
a path, it verifies that the wwid hasn't changed in uev_update_path().
|
|
|
a1c519 |
If get_uid() failed, uev_update_path treated this as a wwid change to 0.
|
|
|
a1c519 |
This could cause paths to suddenly be dropped due to an issue with
|
|
|
a1c519 |
getting the wwid. Even if get_uid() failed because the path was down,
|
|
|
a1c519 |
it no change uevent happend when it later became active, multipathd
|
|
|
a1c519 |
would continue to ignore the path. Also, scsi_uid_fallback() clears the
|
|
|
a1c519 |
failure return if it doesn't attempt to fallback, causing get_uid()
|
|
|
a1c519 |
to return success, when it actually failed.
|
|
|
a1c519 |
|
|
|
a1c519 |
Multipathd should neither set nor clear wwid_changed if get_uid()
|
|
|
a1c519 |
returned failure. Also, scsi_uid_fallback() should retain the old return
|
|
|
a1c519 |
value if it doesn't attempt to fallback.
|
|
|
a1c519 |
|
|
|
a1c519 |
Signed-off-by: Benjamin Marzinski <bmarzins@redhat.com>
|
|
|
a1c519 |
---
|
|
|
a1c519 |
libmultipath/discovery.c | 6 +++---
|
|
|
a1c519 |
multipathd/main.c | 6 ++++--
|
|
|
a1c519 |
2 files changed, 7 insertions(+), 5 deletions(-)
|
|
|
a1c519 |
|
|
|
a1c519 |
diff --git a/libmultipath/discovery.c b/libmultipath/discovery.c
|
|
|
a1c519 |
index 729bcb9..b08cb2d 100644
|
|
|
a1c519 |
--- a/libmultipath/discovery.c
|
|
|
a1c519 |
+++ b/libmultipath/discovery.c
|
|
|
a1c519 |
@@ -1755,9 +1755,9 @@ get_vpd_uid(struct path * pp)
|
|
|
a1c519 |
}
|
|
|
a1c519 |
|
|
|
a1c519 |
static ssize_t scsi_uid_fallback(struct path *pp, int path_state,
|
|
|
a1c519 |
- const char **origin)
|
|
|
a1c519 |
+ const char **origin, ssize_t old_len)
|
|
|
a1c519 |
{
|
|
|
a1c519 |
- ssize_t len = 0;
|
|
|
a1c519 |
+ ssize_t len = old_len;
|
|
|
a1c519 |
int retrigger;
|
|
|
a1c519 |
struct config *conf;
|
|
|
a1c519 |
|
|
|
a1c519 |
@@ -1828,7 +1828,7 @@ get_uid (struct path * pp, int path_state, struct udev_device *udev)
|
|
|
a1c519 |
origin = "sysfs";
|
|
|
a1c519 |
}
|
|
|
a1c519 |
if (len <= 0 && pp->bus == SYSFS_BUS_SCSI)
|
|
|
a1c519 |
- len = scsi_uid_fallback(pp, path_state, &origin);
|
|
|
a1c519 |
+ len = scsi_uid_fallback(pp, path_state, &origin, len);
|
|
|
a1c519 |
}
|
|
|
a1c519 |
if ( len < 0 ) {
|
|
|
a1c519 |
condlog(1, "%s: failed to get %s uid: %s",
|
|
|
a1c519 |
diff --git a/multipathd/main.c b/multipathd/main.c
|
|
|
a1c519 |
index 678ecf8..fd83a6a 100644
|
|
|
a1c519 |
--- a/multipathd/main.c
|
|
|
a1c519 |
+++ b/multipathd/main.c
|
|
|
a1c519 |
@@ -1234,9 +1234,11 @@ uev_update_path (struct uevent *uev, struct vectors * vecs)
|
|
|
a1c519 |
goto out;
|
|
|
a1c519 |
|
|
|
a1c519 |
strcpy(wwid, pp->wwid);
|
|
|
a1c519 |
- get_uid(pp, pp->state, uev->udev);
|
|
|
a1c519 |
+ rc = get_uid(pp, pp->state, uev->udev);
|
|
|
a1c519 |
|
|
|
a1c519 |
- if (strncmp(wwid, pp->wwid, WWID_SIZE) != 0) {
|
|
|
a1c519 |
+ if (rc != 0)
|
|
|
a1c519 |
+ strcpy(pp->wwid, wwid);
|
|
|
a1c519 |
+ else if (strncmp(wwid, pp->wwid, WWID_SIZE) != 0) {
|
|
|
a1c519 |
condlog(0, "%s: path wwid changed from '%s' to '%s'. %s",
|
|
|
a1c519 |
uev->kernel, wwid, pp->wwid,
|
|
|
a1c519 |
(disable_changed_wwids ? "disallowing" :
|
|
|
a1c519 |
--
|
|
|
a1c519 |
2.17.2
|
|
|
a1c519 |
|