David Wolfskill wrote:
[Please include me in responses; I've set Reply-To as a hint. Thanks!]
A colleague had been running a program that makes use of IPCS message
queues in a 7.x/i386 environment.
He was moved to a 32-bit 7.x-based jail instantiated on an 8.x/amd64
host.
Within that jail, "ipcs -a" now fails to come anywhere near close to
reporting what it does outside the jail.
I then performed an experiment: I created a 7.x/i386 jail on my
9.x/i386 laptop. I verified that "ipcs -a" (outside the jail) shows
Stuff:
d134(9.1-P)[1] ipcs -a
Message Queues:
T ID KEY MODE OWNER GROUP CREATOR CGROUP CBYTES QNUM QBYTES LSPID LRPID STIME RTIME CTIME
Shared Memory:
T ID KEY MODE OWNER GROUP CREATOR CGROUP NATTCH SEGSZ CPID LPID ATIME DTIME CTIME
m 393216 0 --rw------- david david david david 2 393216 3671 3147 8:23:37 no-entry 8:23:37
m 851969 0 --rw------- david david david david
2 262080 3861 3147 9:24:09 no-entry 9:24:09
m 458754 0 --rw------- david david david david
2 384000 3861 3147 9:24:09 no-entry 9:24:09
Semaphores:
T ID KEY MODE OWNER GROUP CREATOR CGROUP NSEMS OTIME CTIME
d134(9.1-P)[2]
Inside the jail, using the 7.x version of ipcs, I get:
%ipcs -a
ipcs: sysctlbyname: kern.ipc.msqids: Cannot allocate memory
%
I then recompiled the 9.x versions of ipcs & ipcrm and linked them
statically; running that verion of ipcs, I see:
%~/bin/!!
~/bin/ipcs -a
Message Queues:
T ID KEY MODE OWNER GROUP CREATOR CGROUP CBYTES QNUM QBYTES LSPID LRPID STIME RTIME CTIME
Shared Memory:
T ID KEY MODE OWNER GROUP CREATOR CGROUP NATTCH SEGSZ CPID LPID ATIME DTIME CTIME
m 393216 0 --rw------- david david david david 2 393216 3671 3147 15:23:37 no-entry 15:23:37
m 655362 0 --rw------- david david david david
2 262080 3861 3147 18:39:30 no-entry 18:39:30
Semaphores:
T ID KEY MODE OWNER GROUP CREATOR CGROUP NSEMS OTIME CTIME
%
Is this (inability to access IPCS resources properly within a
"down-level" jail) expected behavior?
Is there a sane(?) way to provide IPCS resources inside a down-level
jail?
Thanks!
Peace,
david
Your problem is in the way you are trying to use jails. The jail has to
be at the same major release level as the host. Host being 9.2 with a
jail at 9.0 may work. But 9.x or 8.x host with 7.x jail for sure will
not work.
_______________________________________________
freebsd-questions@freebsd.org mailing list
http://lists.freebsd.org/mailman/listinfo/freebsd-questions
To unsubscribe, send any mail to "freebsd-questions-unsubscr...@freebsd.org"
