If the checksum verification fails in mdadm and mdmon is running, retry
the load to get a consistent snapshot of the mpb.
Based on db575f3b
Signed-off-by: Artur Paszkiewicz <artur.paszkiewicz@xxxxxxxxx>
Reviewed-by: Pawel Baldysiak <pawel.baldysiak@xxxxxxxxx>
---
super-intel.c | 17 +++++++++++++++++
1 file changed, 17 insertions(+)
diff --git a/super-intel.c b/super-intel.c
index f0a7ab5..037c018 100644
--- a/super-intel.c
+++ b/super-intel.c
@@ -4422,6 +4422,7 @@ static int load_super_imsm(struct supertype *st, int fd, char *devname)
{
struct intel_super *super;
int rv;
+ int retry;
if (test_partition(fd))
/* IMSM not allowed on partitions */
@@ -4444,6 +4445,22 @@ static int load_super_imsm(struct supertype *st, int fd, char *devname)
}
rv = load_and_parse_mpb(fd, super, devname, 0);
+ /* retry the load if we might have raced against mdmon */
+ if (rv == 3) {
+ struct mdstat_ent *mdstat = mdstat_by_component(fd2devnm(fd));
+
+ if (mdmon_running(mdstat->devnm) && getpid() != mdmon_pid(mdstat->devnm)) {
+ for (retry = 0; retry < 3; retry++) {
+ usleep(3000);
+ rv = load_and_parse_mpb(fd, super, devname, 0);
+ if (rv != 3)
+ break;
+ }
+ }
+
+ free_mdstat(mdstat);
+ }
+
if (rv) {
if (devname)
pr_err("Failed to load all information "
--
1.8.4.5
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