Date: Sat, 15 Nov 2014 05:50:34 +0000 From: John <jwd@FreeBSD.org> To: FreeBSD-scsi <freebsd-scsi@freebsd.org> Subject: enc@ 'path too long' sys/param.h patch Message-ID: <20141115055033.GA5740@FreeBSD.org>
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Hi Folks,
I've been booting with verbose enabled and I've been getting many
msgs similar to the following:
kernel: WARNING: Unable to alias diskid/MULTIPATH-S3L0EX490000S349YJZ3 to enc@n500304800169db3d/type@0/slot@8/elmdesc@Slot07/diskid/MULTIPATH-S3L0EX490000S349YJZ3 - path too long
SPECNAMELEN is 63 which is too small. The following small patch
and a rebuild of both world & kernel fixes the problem:
Index: sys/sys/param.h
===================================================================
--- sys/sys/param.h (revision 274524)
+++ sys/sys/param.h (working copy)
@@ -105,7 +105,7 @@
#define NOFILE OPEN_MAX /* max open files per process */
#define NOGROUP 65535 /* marker for empty group set member */
#define MAXHOSTNAMELEN 256 /* max hostname size */
-#define SPECNAMELEN 63 /* max length of devicename */
+#define SPECNAMELEN 127 /* max length of devicename */
/* More types and definitions used throughout the kernel. */
#ifdef _KERNEL
The directory structure now comes up:
enc@n500304800169db3d/type@0/slot@3/elmdesc@Slot02/da0
enc@n500304800169db3d/type@0/slot@3/elmdesc@Slot02/multipath/Z56
enc@n500304800169db3d/type@0/slot@3/elmdesc@Slot02/diskid/MULTIPATH-S3L03ASE0000M446F6CV
However, the other disk in Z56 is not present:
# gmultipath status Z56
Name Status Components
multipath/Z56 OPTIMAL da0 (ACTIVE)
da87 (PASSIVE)
# find enc* | grep da87
#
All the elements found in the current structure are under mpr0. Nothing
in mpr1 is present (the 2nd channel). The shelves are quad channeled with
two cables currently plugged in - so I was expecting to see two paths of disks.
A second item is the symlink values are current directory only:
enc@n500304800169db3d/type@0/slot@3/elmdesc@Slot02/da0 -> da0
enc@n500304800169db3d/type@0/slot@3/elmdesc@Slot02/diskid/MULTIPATH-S3L03ASE0000M446F6CV -> diskid/MULTIPATH-S3L03ASE0000M446F6CV
enc@n500304800169db3d/type@0/slot@3/elmdesc@Slot02/multipath/Z56 -> multipath/Z56
Thus the entries are not usable as is.
Could da0 & da87 simply both show up in the same Slot02 structure?
# camcontrol smpphylist ses4 | grep da0
2 0x5000c500767baa51 <SEAGATE ST1200MM0017 0002> (da0,pass7)
# camcontrol smpphylist ses7 | grep da87
2 0x5000c500767baa51 <SEAGATE ST1200MM0017 0002> (da87,pass94)
Thoughts?
Thanks!
John
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