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From: (Eric W. Biederman)
To: Andrew Morton <>
Cc: Linux Containers <>,
Subject: [PATCH 0/4] Fix the binary ipc and uts namespace sysctls.
Date: Sun, 26 Nov 2006 21:59:26 -0700	[thread overview]
Message-ID: <> (raw)

The binary interface to the namespace sysctls was never implemented
resulting in some really weird things if you attempted to use
sys_sysctl to read your hostname for example.

This patch series simples the code a little and implements the binary
sysctl interface.

In testing this patch series I discovered that our 32bit compatibility
for the binary  sysctl interface is imperfect.  In particular
KERN_SHMMAX and KERN_SMMALL are size_t sized quantities and are
returned as 8 bytes on to 32bit binaries using a x86_64 kernel.  
However this has existing for a long time so it is not a new
regression with the namespace work.

Gads the whole sysctl thing needs work before it stops being easy
to shoot yourself in the foot.

Looking forward a little bit we need a better way to handle sysctls
and namespaces as our current technique will not work for the network
namespace.  I think something based on the current overlapping sysctl
trees will work but the proc side needs to be redone before we can
use it.


             reply	other threads:[~2006-11-27  5:01 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2006-11-27  4:59 Eric W. Biederman [this message]
2006-11-27  5:05 ` [PATCH 1/4] sysctl: Simplify sysctl_uts_string Eric W. Biederman
2006-11-27  5:05 ` [PATCH 2/4] sysctl: Implement sysctl_uts_string Eric W. Biederman
2006-11-27  5:05 ` [PATCH 3/4] sysctl: Simplify ipc ns specific sysctls Eric W. Biederman
2006-11-29  4:56   ` Serge E. Hallyn
2006-11-27  5:05 ` [PATCH 4/4] sysctl: Fix sys_sysctl interface of ipc sysctls Eric W. Biederman
2006-11-27 20:22 ` [PATCH 0/4] Fix the binary ipc and uts namespace sysctls Herbert Poetzl
2006-11-27 22:40   ` Eric W. Biederman
2006-11-28 14:32     ` Herbert Poetzl
2006-11-28 15:38       ` Eric W. Biederman
2006-11-28 16:21         ` Herbert Poetzl
2006-12-04 22:32         ` [PATCH] Fix linux banner utsname information Herbert Poetzl
2006-12-05 17:24           ` Herbert Poetzl
2006-12-06 18:32             ` Herbert Poetzl

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