From: Jiri Slaby <jirislaby@gmail.com>
To: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: [BUG] sunrpc as module and bad proc/sys link count
Date: Fri, 05 Aug 2005 14:54:22 +0200 [thread overview]
Message-ID: <42F3617E.9040808@gmail.com> (raw)
Hello.
When sunrpc is as module, sysctl adds to proc fs proc/sys/sunrpc, adds 1
to number of proc/sys link (see later), but when it's ls-ed, there is
still old count.
I.e.
my proc/sys before modprobe-ing sunrpc:
# ls -la /proc/sys
celkem 0
dr-xr-xr-x 9 root root 0 srp 5 12:43 .
dr-xr-xr-x 114 root root 0 srp 5 2005 ..
dr-xr-xr-x 2 root root 0 srp 5 14:33 debug
dr-xr-xr-x 4 root root 0 srp 5 14:33 dev
dr-xr-xr-x 5 root root 0 srp 5 12:43 fs
drwxr-xr-x 5 root root 0 srp 5 14:33 kernel
dr-xr-xr-x 7 root root 0 srp 5 14:33 net
dr-xr-xr-x 2 root root 0 srp 5 14:33 proc
dr-xr-xr-x 2 root root 0 srp 5 14:33 vm
# stat /proc/sys
File: `/proc/sys'
Size: 0 Blocks: 0 IO Block: 1024 directory
Device: 3h/3d Inode: -268435429 Links: 9
*[BTW This seems like bad interpretation of the un/signed number (real
inode from ls out is 4026531867.]*
Access: (0555/dr-xr-xr-x) Uid: ( 0/ root) Gid: ( 0/ root)
Access: 2005-08-05 12:43:12.066160750 +0200
Modify: 2005-08-05 12:43:12.066160750 +0200
Change: 2005-08-05 12:43:12.066160750 +0200
after:
#modprobe sunrpc
#ls -la /proc/sys
celkem 0
dr-xr-xr-x 9 root root 0 srp 5 12:43 . <-- The 9 here should be now 10
dr-xr-xr-x 114 root root 0 srp 5 2005 ..
dr-xr-xr-x 2 root root 0 srp 5 14:35 debug
dr-xr-xr-x 4 root root 0 srp 5 14:35 dev
dr-xr-xr-x 5 root root 0 srp 5 12:43 fs
drwxr-xr-x 5 root root 0 srp 5 14:35 kernel
dr-xr-xr-x 7 root root 0 srp 5 14:35 net
dr-xr-xr-x 2 root root 0 srp 5 14:35 proc
dr-xr-xr-x 2 root root 0 srp 5 14:35 sunrpc
dr-xr-xr-x 2 root root 0 srp 5 14:35 vm
# stat /proc/sys
File: `/proc/sys'
Size: 0 Blocks: 0 IO Block: 1024 directory
Device: 3h/3d Inode: -268435429 Links: 9
Access: (0555/dr-xr-xr-x) Uid: ( 0/ root) Gid: ( 0/ root)
Access: 2005-08-05 12:43:12.066160750 +0200
Modify: 2005-08-05 12:43:12.066160750 +0200
Change: 2005-08-05 12:43:12.066160750 +0200
When I add printk to proc/generic.c into create_proc_entry before and
after proc_register, it prints 9 and after 10 (so the nlink is added here).
On the other side, when sunrpc is in the kernel (not as module) it works
fine, and the count returned by proc fs is 10, so ok.
This appears in kernels 2.6.11.12 through 2.6.13-rc4-mm1, maybe in older
kernels too.
--
Jiri Slaby www.fi.muni.cz/~xslaby
~\-/~ jirislaby@gmail.com ~\-/~
241B347EC88228DE51EE A49C4A73A25004CB2A10
next reply other threads:[~2005-08-05 12:54 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-08-05 12:54 Jiri Slaby [this message]
2005-08-05 13:57 ` [BUG] sunrpc as module and bad proc/sys link count Miklos Szeredi
2005-08-05 20:13 ` Jiri Slaby
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