This is a note to let you know that I've just added the patch titled
fs: move inode sysctls to its own file
to the 5.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
fs-move-inode-sysctls-to-its-own-file.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit f8ac848d6cdfdc484178b758d6dd12c78e1aa6de
Author: Luis Chamberlain <mcgrof@xxxxxxxxxx>
Date: Fri Jan 21 22:12:52 2022 -0800
fs: move inode sysctls to its own file
[ Upstream commit 1d67fe585049d3e2448b997af78c68cbf90ada09 ]
Patch series "sysctl: 4th set of kernel/sysctl cleanups".
This is slimming down the fs uses of kernel/sysctl.c to the point that
the next step is to just get rid of the fs base directory for it and
move that elsehwere, so that next patch series starts dealing with that
to demo how we can end up cleaning up a full base directory from
kernel/sysctl.c, one at a time.
This patch (of 9):
kernel/sysctl.c is a kitchen sink where everyone leaves their dirty
dishes, this makes it very difficult to maintain.
To help with this maintenance let's start by moving sysctls to places
where they actually belong. The proc sysctl maintainers do not want to
know what sysctl knobs you wish to add for your own piece of code, we
just care about the core logic.
So move the inode sysctls to its own file. Since we are no longer using
this outside of fs/ remove the extern declaration of its respective proc
helper.
We use early_initcall() as it is the earliest we can use.
[arnd@xxxxxxxx: avoid unused-variable warning]
Link: https://lkml.kernel.org/r/20211203190123.874239-1-arnd@xxxxxxxxxx
Link: https://lkml.kernel.org/r/20211129205548.605569-1-mcgrof@xxxxxxxxxx
Link: https://lkml.kernel.org/r/20211129205548.605569-2-mcgrof@xxxxxxxxxx
Signed-off-by: Luis Chamberlain <mcgrof@xxxxxxxxxx>
Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
Cc: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
Cc: Kees Cook <keescook@xxxxxxxxxxxx>
Cc: Iurii Zaikin <yzaikin@xxxxxxxxxx>
Cc: Xiaoming Ni <nixiaoming@xxxxxxxxxx>
Cc: Eric Biederman <ebiederm@xxxxxxxxxxxx>
Cc: Stephen Kitt <steve@xxxxxxx>
Cc: Lukas Middendorf <kernel@xxxxxxxxxxx>
Cc: Antti Palosaari <crope@xxxxxx>
Cc: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
Cc: Jeff Layton <jlayton@xxxxxxxxxx>
Cc: "J. Bruce Fields" <bfields@xxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Stable-dep-of: d727935cad9f ("fs: fix proc_handler for sysctl_nr_open")
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/fs/inode.c b/fs/inode.c
index c7ef50d0fe38b..0a3a14b9ee46f 100644
--- a/fs/inode.c
+++ b/fs/inode.c
@@ -67,11 +67,6 @@ const struct address_space_operations empty_aops = {
};
EXPORT_SYMBOL(empty_aops);
-/*
- * Statistics gathering..
- */
-struct inodes_stat_t inodes_stat;
-
static DEFINE_PER_CPU(unsigned long, nr_inodes);
static DEFINE_PER_CPU(unsigned long, nr_unused);
@@ -106,13 +101,43 @@ long get_nr_dirty_inodes(void)
* Handle nr_inode sysctl
*/
#ifdef CONFIG_SYSCTL
-int proc_nr_inodes(struct ctl_table *table, int write,
- void *buffer, size_t *lenp, loff_t *ppos)
+/*
+ * Statistics gathering..
+ */
+static struct inodes_stat_t inodes_stat;
+
+static int proc_nr_inodes(struct ctl_table *table, int write, void *buffer,
+ size_t *lenp, loff_t *ppos)
{
inodes_stat.nr_inodes = get_nr_inodes();
inodes_stat.nr_unused = get_nr_inodes_unused();
return proc_doulongvec_minmax(table, write, buffer, lenp, ppos);
}
+
+static struct ctl_table inodes_sysctls[] = {
+ {
+ .procname = "inode-nr",
+ .data = &inodes_stat,
+ .maxlen = 2*sizeof(long),
+ .mode = 0444,
+ .proc_handler = proc_nr_inodes,
+ },
+ {
+ .procname = "inode-state",
+ .data = &inodes_stat,
+ .maxlen = 7*sizeof(long),
+ .mode = 0444,
+ .proc_handler = proc_nr_inodes,
+ },
+ { }
+};
+
+static int __init init_fs_inode_sysctls(void)
+{
+ register_sysctl_init("fs", inodes_sysctls);
+ return 0;
+}
+early_initcall(init_fs_inode_sysctls);
#endif
static int no_open(struct inode *inode, struct file *file)
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 2ef0e48c89ec4..2af01758a1abf 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -81,7 +81,6 @@ extern void __init files_maxfiles_init(void);
extern struct files_stat_struct files_stat;
extern unsigned long get_max_files(void);
extern unsigned int sysctl_nr_open;
-extern struct inodes_stat_t inodes_stat;
extern int leases_enable, lease_break_time;
extern int sysctl_protected_symlinks;
extern int sysctl_protected_hardlinks;
@@ -3674,8 +3673,6 @@ int proc_nr_files(struct ctl_table *table, int write,
void *buffer, size_t *lenp, loff_t *ppos);
int proc_nr_dentry(struct ctl_table *table, int write,
void *buffer, size_t *lenp, loff_t *ppos);
-int proc_nr_inodes(struct ctl_table *table, int write,
- void *buffer, size_t *lenp, loff_t *ppos);
int __init list_bdev_fs_names(char *buf, size_t size);
#define __FMODE_EXEC ((__force int) FMODE_EXEC)
diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index 05853e7681512..a491d145acc31 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -3116,20 +3116,6 @@ static struct ctl_table vm_table[] = {
};
static struct ctl_table fs_table[] = {
- {
- .procname = "inode-nr",
- .data = &inodes_stat,
- .maxlen = 2*sizeof(long),
- .mode = 0444,
- .proc_handler = proc_nr_inodes,
- },
- {
- .procname = "inode-state",
- .data = &inodes_stat,
- .maxlen = 7*sizeof(long),
- .mode = 0444,
- .proc_handler = proc_nr_inodes,
- },
{
.procname = "file-nr",
.data = &files_stat,
