Claudio Jeker <[email protected]> writes:
> Looking at the screenshot it seems there is a timing issue. The fsck -N
> tries to run before the disk was actually attached. I guess the iscsid
> startup script should wait to ensure the disks are ready.
> You could probably add a 'sleep 5' to rc_start() in /etc/rc.d/iscsid and
> see if that helps. Ideally iscsictl should actually do the wait or fail.
I took a bit of a look through the code, and I've worked out an
(untested, beyond building) patch. I'll be able to try it later today
probably, but wondering if this looks reasonable?
Unless I misunderstand, it looks like what's happening is that
/dev/vscsi0 isn't ready when iscsid calls vscsi_open(). My proposed fix
is to add a wait loop to this (try 3 times, waiting 5 seconds between
each attempt).
I'll try it tonight once I can reboot the machine.
diff --git a/usr.sbin/iscsid/vscsi.c b/usr.sbin/iscsid/vscsi.c
index dc8d5ed67e0..25f3feba6ff 100644
--- a/usr.sbin/iscsid/vscsi.c
+++ b/usr.sbin/iscsid/vscsi.c
@@ -29,6 +29,7 @@
#include <fcntl.h>
#include <stdlib.h>
#include <string.h>
+#include <unistd.h>
#include "iscsid.h"
#include "log.h"
@@ -52,11 +53,30 @@ void vscsi_fail(void *arg);
void vscsi_dataout(struct connection *, struct scsi_task *, u_int32_t,
size_t, size_t);
+#define VSCSI_OPEN_WAIT 5
+#define VSCSI_OPEN_TRIES 3
+
void
vscsi_open(char *dev)
{
- if ((v.fd = open(dev, O_RDWR)) == -1)
- fatal("vscsi_open");
+ /* Sometimes, it seems we try to open before this is ready.
+ This builds in a little tolerance to that. */
+ int tries;
+
+ for (tries = 1; tries <= VSCSI_OPEN_TRIES; ++tries) {
+ if ((v.fd = open(dev, O_RDWR)) == -1) {
+ /* We can't try again, so fail. */
+ if (tries == VSCSI_OPEN_TRIES)
+ fatal("vscsi_open");
+ log_debug("vscsi_open: waiting...");
+ sleep(VSCSI_OPEN_WAIT);
+ } else {
+ /* That worked, so we're good! */
+ log_debug("vscsci_open: successful");
+ break;
+ }
+ }
+
event_set(&v.ev, v.fd, EV_READ|EV_PERSIST, vscsi_dispatch, NULL);
event_add(&v.ev, NULL);
