Date: Fri, 9 Mar 2012 18:23:38 GMT From: Thomas Steen Rasmussen <thomas@gibfest.dk> To: freebsd-gnats-submit@FreeBSD.org Subject: misc/165886: Using jail name in rctl(8) doesn't work - jail id works Message-ID: <201203091823.q29INclh007461@red.freebsd.org> Resent-Message-ID: <201203091830.q29IUBYa070984@freefall.freebsd.org>
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>Number: 165886
>Category: misc
>Synopsis: Using jail name in rctl(8) doesn't work - jail id works
>Confidential: no
>Severity: non-critical
>Priority: low
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Fri Mar 09 18:30:11 UTC 2012
>Closed-Date:
>Last-Modified:
>Originator: Thomas Steen Rasmussen
>Release: FreeBSD 9.0-RELEASE amd64
>Organization:
>Environment:
FreeBSD osd-asrock 9.0-RELEASE FreeBSD 9.0-RELEASE #0: Thu Mar 8 13:24:23 UTC 2012 root@osd-asrock:/usr/obj/usr/src/sys/RCTL amd64
>Description:
Using jail name in rctl(8) doesn't work - jail id works. Observe:
[root@osd-asrock ~]# jls
JID IP Address Hostname Path
1 10.20.13.1 memtest1 /usr/jails/memtest1
2 10.20.13.2 disktest1 /usr/jails/disktest1
[root@osd-asrock ~]# rctl -hu jail:memtest1
cputime=0
datasize=0
stacksize=0
coredumpsize=0
memoryuse=0
memorylocked=0
maxproc=0
openfiles=0
vmemoryuse=0
pseudoterminals=0
swapuse=0
nthr=0
msgqqueued=0
msgqsize=0
nmsgq=0
nsem=0
nsemop=0
nshm=0
shmsize=0
wallclock=0
[root@osd-asrock ~]# rctl -hu jail:1
cputime=3
datasize=6788k
stacksize=0
coredumpsize=0
memoryuse=8292k
memorylocked=0
maxproc=4
openfiles=0
vmemoryuse=71M
pseudoterminals=0
swapuse=0
nthr=4
msgqqueued=0
msgqsize=0
nmsgq=0
nsem=0
nsemop=0
nshm=0
shmsize=0
wallclock=1348
The problem also happens when setting the limits - if I set the limit using the jail name, the actions are not applied.
>How-To-Repeat:
Try using jail name in a rctl command, like this one from the rctl(8) manpage:
rctl -hu jail:www
Display resource usage information for jail named "www".
Observe that all zeroes are returned instead of the expected values.
>Fix:
>From the source I am guessing the function resolve_ids() should have contained code to resolve the jail name to the jail id - but it doesn't. Adding code to resolve the jail name to id using jail_getid() in the same way jexec(8) didn't help.
In fact, testing revealed that jexec(8) is also unable to resolve the jail name:
# jls
JID IP Address Hostname Path
1 10.20.13.1 memtest1 /usr/jails/memtest1
2 10.20.13.2 disktest1 /usr/jails/disktest1
# jexec memtest1 sh
jexec: jail "memtest1" not found
#
So I guess this is the basic problem.
These jails are installed with ezjail, if that matters.
Further info and testing available on request :)
>Release-Note:
>Audit-Trail:
>Unformatted:
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