From: Mark Lord <lkml@rtr.ca>
To: Alexander Viro <viro@zeniv.linux.org.uk>,
Andrew Morton <akpm@linux-foundation.org>,
Linux Kernel <linux-kernel@vger.kernel.org>
Subject: RFC: permit link(2) to work across --bind mounts ?
Date: Tue, 18 Dec 2007 17:46:21 -0500 [thread overview]
Message-ID: <47684DBD.6030502@rtr.ca> (raw)
Why does link(2) not support hard-linking across bind mount points
of the same underlying filesystem ?
Is it as simple as something like this patch below (minus the printk)?
Not likely, but then I'm not a filesystem guru.
???
--- old/fs/namei.c 2007-12-15 12:33:13.000000000 -0500
+++ linux/fs/namei.c 2007-12-18 17:37:04.000000000 -0500
@@ -2398,8 +2398,11 @@
if (error)
goto out;
error = -EXDEV;
- if (old_nd.mnt != nd.mnt)
- goto out_release;
+ if (old_nd.mnt != nd.mnt) {
+ if (old_nd.mnt->mnt_sb != nd.mnt->mnt_sb)
+ goto out_release;
+ printk("sys_linkat: old_nd.mnt != nd.mnt, but sb is the same. Continuing..\n");
+ }
new_dentry = lookup_create(&nd, 0);
error = PTR_ERR(new_dentry);
if (IS_ERR(new_dentry))
next reply other threads:[~2007-12-18 22:46 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-12-18 22:46 Mark Lord [this message]
2007-12-18 22:57 ` RFC: permit link(2) to work across --bind mounts ? Mark Lord
2007-12-18 23:00 ` Al Viro
2007-12-18 23:14 ` Al Viro
2007-12-19 3:54 ` Mark Lord
2007-12-19 3:59 ` David Newall
2007-12-19 16:47 ` Mark Lord
2007-12-19 18:38 ` David Newall
2007-12-29 2:53 ` dean gaudet
2007-12-29 3:31 ` Jan Engelhardt
2007-12-29 6:02 ` dean gaudet
2007-12-29 6:48 ` Jan Engelhardt
2007-12-29 8:29 ` David Newall
2007-12-29 16:18 ` dean gaudet
2007-12-29 20:35 ` David Newall
2007-12-29 20:40 ` dean gaudet
2007-12-30 3:43 ` Valdis.Kletnieks
2007-12-30 3:55 ` dean gaudet
2007-12-27 3:43 ` Rogelio M. Serrano Jr.
[not found] <9BTqk-2ck-31@gated-at.bofh.it>
[not found] ` <9BTJN-2Sv-21@gated-at.bofh.it>
[not found] ` <9BTTr-35L-13@gated-at.bofh.it>
2007-12-19 13:43 ` Bodo Eggert
2007-12-19 14:23 ` Al Viro
2007-12-19 15:42 ` Johannes Weiner
2007-12-19 16:44 ` Mark Lord
2007-12-20 20:55 ` Bodo Eggert
-- strict thread matches above, loose matches on Subject: below --
2007-12-20 1:33 linux
2007-12-20 2:06 ` Mark Lord
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