On Tue, 3 Jan 2006, TSaplin Mikhail wrote:
Hi all i have a problem with devfs device hiding.
My system is FreeBSD 6.0 (i386 and amd64, compiled from last sunday source
(RELENG_6))
After mounting defs:
#mount -t devfs devfs /tmp/proba
first devfs command:
# devfs -m /tmp/proba rule add type disk hide
devfs rule: ioctl DEVFSIO_RADD: Input/output error
the second command hangs:
# devfs -m /tmp/proba rule add type disk hide
command doesnt responds on HUP and TERM signals
A week or two ago I fixed a bug in devfs where an error condition results in a
lock leak, followed by hanging processes and a deadlock. I merged the change
to RELENG_6 this morning having returned from India yesterday night. If a
fair number of people are running into this, we may want to merge it to
RELENG_6_0 and do an errata announcement for it. The change you want is this
one:
revision 1.21
date: 2006/01/03 09:49:10; author: rwatson; state: Exp; lines: +4 -2
When returning EIO from DEVFSIO_RADD ioctl, drop the exclusive rule
lock. Otherwise the system comes to a rather sudden and grinding
halt.
MFC after: 1 week
I ran into it while on travel, as I was trying to get devfs to make /dev/bpf*
readable by the operator group, and typed the command wrong. The RELENG_6
revision is devfs_rule.c:1.14.2.3.
Robert N M Watson
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