commit bcf88e1163623e8e8ef2ba7feface9c826a890c9
author Daniel Drake <dsd@gentoo.org> Sun May 01 08:59:03 2005 -0700
committer Linus Torvalds <torvalds@ppc970.osdl.org> Sun May 01 08:59:03 2005 -0700
tree b385deef7d18d781d8f9e02af40c7bce3f43885d
parent 7f261b5f0dccd53ed3a9a95b55c36e24a698a92a

[PATCH] procfs: Fix hardlink counts

The pid directories in /proc/ currently return the wrong hardlink count - 3,
when there are actually 4 : ".", "..", "fd", and "task".

This is easy to notice using find(1):
	cd /proc/<pid>
	find

In the output, you'll see a message similar to:

find: WARNING: Hard link count is wrong for .: this may be a bug in your
filesystem driver.  Automatically turning on find's -noleaf option.
Earlier results may have failed to include directories that should have
been searched.

http://bugs.gentoo.org/show_bug.cgi?id=86031

I also noticed that CONFIG_SECURITY can add a 5th: attr, and performed a
similar fix on the task directories too.

Signed-off-by: Daniel Drake <dsd@gentoo.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

fs/proc/base.c

diff --git a/fs/proc/base.c b/fs/proc/base.c
index 39fd336..4718173 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -1800,8 +1800,12 @@
 	inode->i_mode = S_IFDIR|S_IRUGO|S_IXUGO;
 	inode->i_op = &proc_tgid_base_inode_operations;
 	inode->i_fop = &proc_tgid_base_operations;
-	inode->i_nlink = 3;
 	inode->i_flags|=S_IMMUTABLE;
+#ifdef CONFIG_SECURITY
+	inode->i_nlink = 5;
+#else
+	inode->i_nlink = 4;
+#endif
 
 	dentry->d_op = &pid_base_dentry_operations;
 
@@ -1855,8 +1859,12 @@
 	inode->i_mode = S_IFDIR|S_IRUGO|S_IXUGO;
 	inode->i_op = &proc_tid_base_inode_operations;
 	inode->i_fop = &proc_tid_base_operations;
-	inode->i_nlink = 3;
 	inode->i_flags|=S_IMMUTABLE;
+#ifdef CONFIG_SECURITY
+	inode->i_nlink = 4;
+#else
+	inode->i_nlink = 3;
+#endif
 
 	dentry->d_op = &pid_base_dentry_operations;