Andrew Morton wrote:
> On Mon, 3 Dec 2007 19:00:25 GMT Linux Kernel Mailing List <[email protected]> wrote:
>
>> Gitweb: http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=2b1e300a9dfc3196ccddf6f1d74b91b7af55e416
>> Commit: 2b1e300a9dfc3196ccddf6f1d74b91b7af55e416
>> Parent: e03ba84adb62fbc6049325a5bc00ef6932fa5e39
>> Author: Eric W. Biederman <[email protected]>
>> AuthorDate: Sun Dec 2 00:33:17 2007 +1100
>> Committer: Herbert Xu <[email protected]>
>> CommitDate: Sun Dec 2 00:33:17 2007 +1100
>>
>> [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.
>
> This patch caused the binfmt_misc regression reported in
> http://bugzilla.kernel.org/show_bug.cgi?id=9504
This patch also doesn't allow to mount /proc/bus/usb
ciao
cate
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