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Subject[PATCH 08/13] inotify: simplify sysctl declaration with register_sysctl_subdir()
Date
From: Xiaoming Ni <nixiaoming@huawei.com>

move inotify_user sysctl to inotify_user.c and use the new
register_sysctl_subdir() helper.

Signed-off-by: Xiaoming Ni <nixiaoming@huawei.com>
Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>
---
fs/notify/inotify/inotify_user.c | 11 ++++++++++-
include/linux/inotify.h | 3 ---
kernel/sysctl.c | 11 -----------
3 files changed, 10 insertions(+), 15 deletions(-)

diff --git a/fs/notify/inotify/inotify_user.c b/fs/notify/inotify/inotify_user.c
index f88bbcc9efeb..64859fbf8463 100644
--- a/fs/notify/inotify/inotify_user.c
+++ b/fs/notify/inotify/inotify_user.c
@@ -46,7 +46,7 @@ struct kmem_cache *inotify_inode_mark_cachep __read_mostly;

#include <linux/sysctl.h>

-struct ctl_table inotify_table[] = {
+static struct ctl_table inotify_table[] = {
{
.procname = "max_user_instances",
.data = &init_user_ns.ucount_max[UCOUNT_INOTIFY_INSTANCES],
@@ -73,6 +73,14 @@ struct ctl_table inotify_table[] = {
},
{ }
};
+
+static void __init inotify_sysctls_init(void)
+{
+ register_sysctl_subdir("fs", "inotify", inotify_table);
+}
+
+#else
+#define inotify_sysctls_init() do { } while (0)
#endif /* CONFIG_SYSCTL */

static inline __u32 inotify_arg_to_mask(u32 arg)
@@ -826,6 +834,7 @@ static int __init inotify_user_setup(void)
inotify_max_queued_events = 16384;
init_user_ns.ucount_max[UCOUNT_INOTIFY_INSTANCES] = 128;
init_user_ns.ucount_max[UCOUNT_INOTIFY_WATCHES] = 8192;
+ inotify_sysctls_init();

return 0;
}
diff --git a/include/linux/inotify.h b/include/linux/inotify.h
index 6a24905f6e1e..8d20caa1b268 100644
--- a/include/linux/inotify.h
+++ b/include/linux/inotify.h
@@ -7,11 +7,8 @@
#ifndef _LINUX_INOTIFY_H
#define _LINUX_INOTIFY_H

-#include <linux/sysctl.h>
#include <uapi/linux/inotify.h>

-extern struct ctl_table inotify_table[]; /* for sysctl */
-
#define ALL_INOTIFY_BITS (IN_ACCESS | IN_MODIFY | IN_ATTRIB | IN_CLOSE_WRITE | \
IN_CLOSE_NOWRITE | IN_OPEN | IN_MOVED_FROM | \
IN_MOVED_TO | IN_CREATE | IN_DELETE | \
diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index 04ff032f2863..30c2d521502a 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -123,10 +123,6 @@ static const int maxolduid = 65535;
static int ngroups_max = NGROUPS_MAX;
static const int cap_last_cap = CAP_LAST_CAP;

-#ifdef CONFIG_INOTIFY_USER
-#include <linux/inotify.h>
-#endif
-
#ifdef CONFIG_PROC_SYSCTL

/**
@@ -3012,13 +3008,6 @@ static struct ctl_table fs_table[] = {
.proc_handler = proc_dointvec,
},
#endif
-#ifdef CONFIG_INOTIFY_USER
- {
- .procname = "inotify",
- .mode = 0555,
- .child = inotify_table,
- },
-#endif
#ifdef CONFIG_EPOLL
{
.procname = "epoll",
--
2.26.2
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