[Devel] [PATCH 52/59] sysctl: Create sys/fs/binfmt_misc as an ordinary sysctl entry

[Eric W. Biederman]

From: Eric W. Biederman <ebiederm at xmission.com> - unquoted

binfmt_misc has a mount point in the middle of the sysctl and
that mount point is created as a proc_generic directory.

Doing it that way gets in the way of cleaning up the sysctl
proc support as it continues the existence of a horrible hack.
So instead simply create the directory as an ordinary sysctl
directory.   At least that removes the magic special case.

Signed-off-by: Eric W. Biederman <ebiederm at xmission.com>
---
 fs/proc/root.c  |    4 ----
 kernel/sysctl.c |   13 +++++++++++++
 2 files changed, 13 insertions(+), 4 deletions(-)

diff --git a/fs/proc/root.c b/fs/proc/root.c
index 64d242b..8059e92 100644
--- a/fs/proc/root.c
+++ b/fs/proc/root.c
@@ -74,10 +74,6 @@ void __init proc_root_init(void)
 #ifdef CONFIG_SYSCTL
 	proc_sys_root = proc_mkdir("sys", NULL);
 #endif
-#if defined(CONFIG_BINFMT_MISC) || defined(CONFIG_BINFMT_MISC_MODULE)
-	proc_mkdir("sys/fs", NULL);
-	proc_mkdir("sys/fs/binfmt_misc", NULL);
-#endif
 	proc_root_fs = proc_mkdir("fs", NULL);
 	proc_root_driver = proc_mkdir("driver", NULL);
 	proc_mkdir("fs/nfsd", NULL); /* somewhere for the nfsd filesystem to be mounted */
diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index 6e2e608..8da6647 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -142,6 +142,7 @@ static struct ctl_table_header root_table_header =
 static ctl_table kern_table[];
 static ctl_table vm_table[];
 static ctl_table fs_table[];
+static ctl_table binfmt_misc_table[];
 static ctl_table debug_table[];
 static ctl_table dev_table[];
 extern ctl_table random_table[];
@@ -1001,6 +1002,18 @@ static ctl_table fs_table[] = {
 		.mode		= 0644,
 		.proc_handler	= &proc_dointvec,
 	},
+#if defined(CONFIG_BINFMT_MISC) || defined(CONFIG_BINFMT_MISC_MODULE)
+	{
+		.ctl_name	= CTL_UNNUMBERED,
+		.procname	= "binfmt_misc",
+		.mode		= 0555,
+		.child		= binfmt_misc_table,
+	},
+#endif
+	{ .ctl_name = 0 }
+};
+
+static ctl_table binfmt_misc_table[] = {
 	{ .ctl_name = 0 }
 };
 
-- 
1.4.4.1.g278f

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