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authorEric W. Biederman <ebiederm@xmission.com>2007-12-02 00:33:17 +1100
committerHerbert Xu <herbert@gondor.apana.org.au>2007-12-02 00:33:17 +1100
commit2b1e300a9dfc3196ccddf6f1d74b91b7af55e416 (patch)
tree3181bf4f2c27d185c78b26642f35ed00cb280943 /fs/nfs
parente03ba84adb62fbc6049325a5bc00ef6932fa5e39 (diff)
[NETNS]: Fix /proc/net breakage
Well I clearly goofed when I added the initial network namespace support for /proc/net. Currently things work but there are odd details visible to user space, even when we have a single network namespace. Since we do not cache proc_dir_entry dentries at the moment we can just modify ->lookup to return a different directory inode depending on the network namespace of the process looking at /proc/net, replacing the current technique of using a magic and fragile follow_link method. To accomplish that this patch: - introduces a shadow_proc method to allow different dentries to be returned from proc_lookup. - Removes the old /proc/net follow_link magic - Fixes a weakness in our not caching of proc generic dentries. As shadow_proc uses a task struct to decided which dentry to return we can go back later and fix the proc generic caching without modifying any code that uses the shadow_proc method. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> Cc: "Rafael J. Wysocki" <rjw@sisk.pl> Cc: Pavel Machek <pavel@ucw.cz> Cc: Pavel Emelyanov <xemul@openvz.org> Cc: "David S. Miller" <davem@davemloft.net> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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