From: David Howells <dhowells@redhat.com>
To: viro@zeniv.linux.org.uk
Cc: torvalds@linux-foundation.org, dhowells@redhat.com,
linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH 04/33] vfs: Suppress MS_* flag defs within the kernel unless explicitly enabled [ver #11]
Date: Wed, 01 Aug 2018 16:24:30 +0100 [thread overview]
Message-ID: <153313707094.13253.9967026191676513298.stgit@warthog.procyon.org.uk> (raw)
In-Reply-To: <153313703562.13253.5766498657900728120.stgit@warthog.procyon.org.uk>
Only the mount namespace code that implements mount(2) should be using the
MS_* flags. Suppress them inside the kernel unless uapi/linux/mount.h is
included.
Signed-off-by: David Howells <dhowells@redhat.com>
---
arch/arc/kernel/setup.c | 1 +
arch/arm/kernel/atags_parse.c | 1 +
arch/sh/kernel/setup.c | 1 +
arch/sparc/kernel/setup_32.c | 1 +
arch/sparc/kernel/setup_64.c | 1 +
arch/x86/kernel/setup.c | 1 +
drivers/base/devtmpfs.c | 1 +
fs/f2fs/super.c | 2 +
fs/pnode.c | 1 +
fs/super.c | 1 +
include/uapi/linux/fs.h | 56 ++++-------------------------------------
include/uapi/linux/mount.h | 54 ++++++++++++++++++++++++++++++++++++++++
init/do_mounts.c | 1 +
init/do_mounts_initrd.c | 1 +
security/apparmor/lsm.c | 1 +
security/apparmor/mount.c | 1 +
security/selinux/hooks.c | 1 +
security/tomoyo/mount.c | 1 +
18 files changed, 75 insertions(+), 52 deletions(-)
diff --git a/arch/arc/kernel/setup.c b/arch/arc/kernel/setup.c
index b2cae79a25d7..714dc5c2baf1 100644
--- a/arch/arc/kernel/setup.c
+++ b/arch/arc/kernel/setup.c
@@ -19,6 +19,7 @@
#include <linux/of_fdt.h>
#include <linux/of.h>
#include <linux/cache.h>
+#include <uapi/linux/mount.h>
#include <asm/sections.h>
#include <asm/arcregs.h>
#include <asm/tlb.h>
diff --git a/arch/arm/kernel/atags_parse.c b/arch/arm/kernel/atags_parse.c
index c10a3e8ee998..a8a4333929f5 100644
--- a/arch/arm/kernel/atags_parse.c
+++ b/arch/arm/kernel/atags_parse.c
@@ -24,6 +24,7 @@
#include <linux/root_dev.h>
#include <linux/screen_info.h>
#include <linux/memblock.h>
+#include <uapi/linux/mount.h>
#include <asm/setup.h>
#include <asm/system_info.h>
diff --git a/arch/sh/kernel/setup.c b/arch/sh/kernel/setup.c
index c286cf5da6e7..2c0e0f37a318 100644
--- a/arch/sh/kernel/setup.c
+++ b/arch/sh/kernel/setup.c
@@ -32,6 +32,7 @@
#include <linux/of.h>
#include <linux/of_fdt.h>
#include <linux/uaccess.h>
+#include <uapi/linux/mount.h>
#include <asm/io.h>
#include <asm/page.h>
#include <asm/elf.h>
diff --git a/arch/sparc/kernel/setup_32.c b/arch/sparc/kernel/setup_32.c
index 13664c377196..7df3d704284c 100644
--- a/arch/sparc/kernel/setup_32.c
+++ b/arch/sparc/kernel/setup_32.c
@@ -34,6 +34,7 @@
#include <linux/kdebug.h>
#include <linux/export.h>
#include <linux/start_kernel.h>
+#include <uapi/linux/mount.h>
#include <asm/io.h>
#include <asm/processor.h>
diff --git a/arch/sparc/kernel/setup_64.c b/arch/sparc/kernel/setup_64.c
index 7944b3ca216a..206bf81eedaf 100644
--- a/arch/sparc/kernel/setup_64.c
+++ b/arch/sparc/kernel/setup_64.c
@@ -33,6 +33,7 @@
#include <linux/module.h>
#include <linux/start_kernel.h>
#include <linux/bootmem.h>
+#include <uapi/linux/mount.h>
#include <asm/io.h>
#include <asm/processor.h>
diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index 2f86d883dd95..3413f53e0a35 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -51,6 +51,7 @@
#include <linux/kvm_para.h>
#include <linux/dma-contiguous.h>
#include <xen/xen.h>
+#include <uapi/linux/mount.h>
#include <linux/errno.h>
#include <linux/kernel.h>
diff --git a/drivers/base/devtmpfs.c b/drivers/base/devtmpfs.c
index 9c0126ad7de1..1b87a1e03b45 100644
--- a/drivers/base/devtmpfs.c
+++ b/drivers/base/devtmpfs.c
@@ -25,6 +25,7 @@
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/kthread.h>
+#include <uapi/linux/mount.h>
#include "base.h"
static struct task_struct *thread;
diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
index 1c56a9f2598d..3dbf69209fe2 100644
--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -1454,7 +1454,7 @@ static int f2fs_remount(struct super_block *sb, int *flags,
err = dquot_suspend(sb, -1);
if (err < 0)
goto restore_opts;
- } else if (f2fs_readonly(sb) && !(*flags & MS_RDONLY)) {
+ } else if (f2fs_readonly(sb) && !(*flags & SB_RDONLY)) {
/* dquot_resume needs RW */
sb->s_flags &= ~SB_RDONLY;
if (sb_any_quota_suspended(sb)) {
diff --git a/fs/pnode.c b/fs/pnode.c
index 53d411a371ce..1100e810d855 100644
--- a/fs/pnode.c
+++ b/fs/pnode.c
@@ -10,6 +10,7 @@
#include <linux/mount.h>
#include <linux/fs.h>
#include <linux/nsproxy.h>
+#include <uapi/linux/mount.h>
#include "internal.h"
#include "pnode.h"
diff --git a/fs/super.c b/fs/super.c
index c9333d317b5f..c9d208b7999e 100644
--- a/fs/super.c
+++ b/fs/super.c
@@ -35,6 +35,7 @@
#include <linux/fsnotify.h>
#include <linux/lockdep.h>
#include <linux/user_namespace.h>
+#include <uapi/linux/mount.h>
#include "internal.h"
static int thaw_super_locked(struct super_block *sb);
diff --git a/include/uapi/linux/fs.h b/include/uapi/linux/fs.h
index 73e01918f996..1c982eb44ff4 100644
--- a/include/uapi/linux/fs.h
+++ b/include/uapi/linux/fs.h
@@ -14,6 +14,11 @@
#include <linux/ioctl.h>
#include <linux/types.h>
+/* Use of MS_* flags within the kernel is restricted to core mount(2) code. */
+#if !defined(__KERNEL__)
+#include <linux/mount.h>
+#endif
+
/*
* It's silly to have NR_OPEN bigger than NR_FILE, but you can change
* the file limit at runtime and only root can increase the per-process
@@ -101,57 +106,6 @@ struct inodes_stat_t {
#define NR_FILE 8192 /* this can well be larger on a larger system */
-
-/*
- * These are the fs-independent mount-flags: up to 32 flags are supported
- */
-#define MS_RDONLY 1 /* Mount read-only */
-#define MS_NOSUID 2 /* Ignore suid and sgid bits */
-#define MS_NODEV 4 /* Disallow access to device special files */
-#define MS_NOEXEC 8 /* Disallow program execution */
-#define MS_SYNCHRONOUS 16 /* Writes are synced at once */
-#define MS_REMOUNT 32 /* Alter flags of a mounted FS */
-#define MS_MANDLOCK 64 /* Allow mandatory locks on an FS */
-#define MS_DIRSYNC 128 /* Directory modifications are synchronous */
-#define MS_NOATIME 1024 /* Do not update access times. */
-#define MS_NODIRATIME 2048 /* Do not update directory access times */
-#define MS_BIND 4096
-#define MS_MOVE 8192
-#define MS_REC 16384
-#define MS_VERBOSE 32768 /* War is peace. Verbosity is silence.
- MS_VERBOSE is deprecated. */
-#define MS_SILENT 32768
-#define MS_POSIXACL (1<<16) /* VFS does not apply the umask */
-#define MS_UNBINDABLE (1<<17) /* change to unbindable */
-#define MS_PRIVATE (1<<18) /* change to private */
-#define MS_SLAVE (1<<19) /* change to slave */
-#define MS_SHARED (1<<20) /* change to shared */
-#define MS_RELATIME (1<<21) /* Update atime relative to mtime/ctime. */
-#define MS_KERNMOUNT (1<<22) /* this is a kern_mount call */
-#define MS_I_VERSION (1<<23) /* Update inode I_version field */
-#define MS_STRICTATIME (1<<24) /* Always perform atime updates */
-#define MS_LAZYTIME (1<<25) /* Update the on-disk [acm]times lazily */
-
-/* These sb flags are internal to the kernel */
-#define MS_SUBMOUNT (1<<26)
-#define MS_NOREMOTELOCK (1<<27)
-#define MS_NOSEC (1<<28)
-#define MS_BORN (1<<29)
-#define MS_ACTIVE (1<<30)
-#define MS_NOUSER (1<<31)
-
-/*
- * Superblock flags that can be altered by MS_REMOUNT
- */
-#define MS_RMT_MASK (MS_RDONLY|MS_SYNCHRONOUS|MS_MANDLOCK|MS_I_VERSION|\
- MS_LAZYTIME)
-
-/*
- * Old magic mount flag and mask
- */
-#define MS_MGC_VAL 0xC0ED0000
-#define MS_MGC_MSK 0xffff0000
-
/*
* Structure for FS_IOC_FSGETXATTR[A] and FS_IOC_FSSETXATTR.
*/
diff --git a/include/uapi/linux/mount.h b/include/uapi/linux/mount.h
index 89adf0d731ab..3634e065836c 100644
--- a/include/uapi/linux/mount.h
+++ b/include/uapi/linux/mount.h
@@ -1,6 +1,60 @@
#ifndef _UAPI_LINUX_MOUNT_H
#define _UAPI_LINUX_MOUNT_H
+/*
+ * These are the fs-independent mount-flags: up to 32 flags are supported
+ *
+ * Usage of these is restricted within the kernel to core mount(2) code and
+ * callers of sys_mount() only. Filesystems should be using the SB_*
+ * equivalent instead.
+ */
+#define MS_RDONLY 1 /* Mount read-only */
+#define MS_NOSUID 2 /* Ignore suid and sgid bits */
+#define MS_NODEV 4 /* Disallow access to device special files */
+#define MS_NOEXEC 8 /* Disallow program execution */
+#define MS_SYNCHRONOUS 16 /* Writes are synced at once */
+#define MS_REMOUNT 32 /* Alter flags of a mounted FS */
+#define MS_MANDLOCK 64 /* Allow mandatory locks on an FS */
+#define MS_DIRSYNC 128 /* Directory modifications are synchronous */
+#define MS_NOATIME 1024 /* Do not update access times. */
+#define MS_NODIRATIME 2048 /* Do not update directory access times */
+#define MS_BIND 4096
+#define MS_MOVE 8192
+#define MS_REC 16384
+#define MS_VERBOSE 32768 /* War is peace. Verbosity is silence.
+ MS_VERBOSE is deprecated. */
+#define MS_SILENT 32768
+#define MS_POSIXACL (1<<16) /* VFS does not apply the umask */
+#define MS_UNBINDABLE (1<<17) /* change to unbindable */
+#define MS_PRIVATE (1<<18) /* change to private */
+#define MS_SLAVE (1<<19) /* change to slave */
+#define MS_SHARED (1<<20) /* change to shared */
+#define MS_RELATIME (1<<21) /* Update atime relative to mtime/ctime. */
+#define MS_KERNMOUNT (1<<22) /* this is a kern_mount call */
+#define MS_I_VERSION (1<<23) /* Update inode I_version field */
+#define MS_STRICTATIME (1<<24) /* Always perform atime updates */
+#define MS_LAZYTIME (1<<25) /* Update the on-disk [acm]times lazily */
+
+/* These sb flags are internal to the kernel */
+#define MS_SUBMOUNT (1<<26)
+#define MS_NOREMOTELOCK (1<<27)
+#define MS_NOSEC (1<<28)
+#define MS_BORN (1<<29)
+#define MS_ACTIVE (1<<30)
+#define MS_NOUSER (1<<31)
+
+/*
+ * Superblock flags that can be altered by MS_REMOUNT
+ */
+#define MS_RMT_MASK (MS_RDONLY|MS_SYNCHRONOUS|MS_MANDLOCK|MS_I_VERSION|\
+ MS_LAZYTIME)
+
+/*
+ * Old magic mount flag and mask
+ */
+#define MS_MGC_VAL 0xC0ED0000
+#define MS_MGC_MSK 0xffff0000
+
/*
* open_tree() flags.
*/
diff --git a/init/do_mounts.c b/init/do_mounts.c
index 7e26be00c444..d4fc2a5afdb6 100644
--- a/init/do_mounts.c
+++ b/init/do_mounts.c
@@ -32,6 +32,7 @@
#include <linux/nfs_fs.h>
#include <linux/nfs_fs_sb.h>
#include <linux/nfs_mount.h>
+#include <uapi/linux/mount.h>
#include "do_mounts.h"
diff --git a/init/do_mounts_initrd.c b/init/do_mounts_initrd.c
index 5a91aefa7305..65de0412f80f 100644
--- a/init/do_mounts_initrd.c
+++ b/init/do_mounts_initrd.c
@@ -18,6 +18,7 @@
#include <linux/sched.h>
#include <linux/freezer.h>
#include <linux/kmod.h>
+#include <uapi/linux/mount.h>
#include "do_mounts.h"
diff --git a/security/apparmor/lsm.c b/security/apparmor/lsm.c
index bc3e209d2bd4..84e644ce3583 100644
--- a/security/apparmor/lsm.c
+++ b/security/apparmor/lsm.c
@@ -24,6 +24,7 @@
#include <linux/audit.h>
#include <linux/user_namespace.h>
#include <net/sock.h>
+#include <uapi/linux/mount.h>
#include "include/apparmor.h"
#include "include/apparmorfs.h"
diff --git a/security/apparmor/mount.c b/security/apparmor/mount.c
index c1da22482bfb..8c3787399356 100644
--- a/security/apparmor/mount.c
+++ b/security/apparmor/mount.c
@@ -15,6 +15,7 @@
#include <linux/fs.h>
#include <linux/mount.h>
#include <linux/namei.h>
+#include <uapi/linux/mount.h>
#include "include/apparmor.h"
#include "include/audit.h"
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index f5e5c8a087ae..ef0428311a5c 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -88,6 +88,7 @@
#include <linux/msg.h>
#include <linux/shm.h>
#include <linux/bpf.h>
+#include <uapi/linux/mount.h>
#include "avc.h"
#include "objsec.h"
diff --git a/security/tomoyo/mount.c b/security/tomoyo/mount.c
index 807fd91dbb54..7dc7f59b7dde 100644
--- a/security/tomoyo/mount.c
+++ b/security/tomoyo/mount.c
@@ -6,6 +6,7 @@
*/
#include <linux/slab.h>
+#include <uapi/linux/mount.h>
#include "common.h"
/* String table for special mount operations. */
next prev parent reply other threads:[~2018-08-01 15:24 UTC|newest]
Thread overview: 116+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-08-01 15:23 [PATCH 00/33] VFS: Introduce filesystem context [ver #11] David Howells
2018-08-01 15:24 ` [PATCH 01/33] vfs: syscall: Add open_tree(2) to reference or clone a mount " David Howells
2018-08-02 17:31 ` Alan Jenkins
2018-08-02 21:29 ` Al Viro
2018-08-02 21:51 ` David Howells
2018-08-02 23:46 ` Alan Jenkins
2018-08-01 15:24 ` [PATCH 02/33] vfs: syscall: Add move_mount(2) to move mounts around " David Howells
2018-08-01 15:24 ` [PATCH 03/33] teach move_mount(2) to work with OPEN_TREE_CLONE " David Howells
2018-10-12 14:25 ` Alan Jenkins
2018-08-01 15:24 ` David Howells [this message]
2018-08-01 15:24 ` [PATCH 05/33] vfs: Introduce the basic header for the new mount API's filesystem context " David Howells
2018-08-01 15:24 ` [PATCH 06/33] vfs: Introduce logging functions " David Howells
2018-08-01 15:24 ` [PATCH 07/33] vfs: Add configuration parser helpers " David Howells
2018-08-01 15:24 ` [PATCH 08/33] vfs: Add LSM hooks for the new mount API " David Howells
2018-08-01 20:50 ` James Morris
2018-08-01 22:53 ` David Howells
2018-08-01 15:25 ` [PATCH 09/33] selinux: Implement the new mount API LSM hooks " David Howells
2018-08-01 15:25 ` [PATCH 10/33] smack: Implement filesystem context security " David Howells
2018-08-01 15:25 ` [PATCH 11/33] apparmor: Implement security hooks for the new mount API " David Howells
2018-08-01 15:25 ` [PATCH 12/33] tomoyo: " David Howells
2018-08-01 15:25 ` [PATCH 13/33] vfs: Separate changing mount flags full remount " David Howells
2018-08-01 15:25 ` [PATCH 14/33] vfs: Implement a filesystem superblock creation/configuration context " David Howells
2018-09-11 17:46 ` Guenter Roeck
2018-09-11 21:52 ` David Howells
2018-09-11 22:07 ` Guenter Roeck
2018-09-11 23:17 ` David Howells
2018-09-11 23:54 ` Guenter Roeck
2018-09-18 9:07 ` Sergey Senozhatsky
2018-09-18 9:40 ` Sergey Senozhatsky
2018-09-18 14:06 ` Guenter Roeck
2018-09-19 1:12 ` Sergey Senozhatsky
2018-09-19 1:26 ` Sergey Senozhatsky
2018-09-18 15:34 ` David Howells
2018-09-18 16:39 ` David Howells
2018-09-19 1:15 ` Sergey Senozhatsky
2018-09-18 17:43 ` David Howells
2018-09-18 9:54 ` Sergey Senozhatsky
2018-09-18 15:28 ` David Howells
2018-08-01 15:25 ` [PATCH 15/33] vfs: Remove unused code after filesystem context changes " David Howells
2018-08-01 15:25 ` [PATCH 16/33] procfs: Move proc_fill_super() to fs/proc/root.c " David Howells
2018-08-01 15:26 ` [PATCH 17/33] proc: Add fs_context support to procfs " David Howells
2018-08-01 15:26 ` [PATCH 18/33] ipc: Convert mqueue fs to fs_context " David Howells
2018-08-01 15:26 ` [PATCH 19/33] cpuset: Use " David Howells
2018-08-01 15:26 ` [PATCH 20/33] kernfs, sysfs, cgroup, intel_rdt: Support " David Howells
2018-08-01 15:26 ` [PATCH 21/33] hugetlbfs: Convert to " David Howells
2018-08-01 15:26 ` [PATCH 22/33] vfs: Remove kern_mount_data() " David Howells
2018-08-01 15:26 ` [PATCH 23/33] vfs: Provide documentation for new mount API " David Howells
2018-08-01 15:26 ` [PATCH 24/33] Make anon_inodes unconditional " David Howells
2018-08-01 15:26 ` [PATCH 25/33] vfs: syscall: Add fsopen() to prepare for superblock creation " David Howells
2018-08-01 15:27 ` [PATCH 26/33] vfs: Implement logging through fs_context " David Howells
2018-08-01 15:27 ` [PATCH 27/33] vfs: Add some logging to the core users of the fs_context log " David Howells
2018-08-01 15:27 ` [PATCH 28/33] vfs: syscall: Add fsconfig() for configuring and managing a context " David Howells
2018-08-06 17:28 ` Eric W. Biederman
2018-08-09 14:14 ` David Howells
2018-08-09 14:24 ` David Howells
2018-08-09 14:35 ` Miklos Szeredi
2018-08-09 15:32 ` Eric W. Biederman
2018-08-09 16:33 ` David Howells
2018-08-11 20:20 ` David Howells
2018-08-11 23:26 ` Andy Lutomirski
2018-08-01 15:27 ` [PATCH 29/33] vfs: syscall: Add fsmount() to create a mount for a superblock " David Howells
2018-08-01 15:27 ` [PATCH 30/33] vfs: syscall: Add fspick() to select a superblock for reconfiguration " David Howells
2018-08-24 14:51 ` Miklos Szeredi
2018-08-24 14:54 ` Andy Lutomirski
2018-08-01 15:27 ` [PATCH 31/33] afs: Add fs_context support " David Howells
2018-08-01 15:27 ` [PATCH 32/33] afs: Use fs_context to pass parameters over automount " David Howells
2018-08-01 15:27 ` [PATCH 33/33] vfs: Add a sample program for the new mount API " David Howells
2018-08-10 14:05 ` BUG: Mount ignores mount options Eric W. Biederman
2018-08-10 14:36 ` Andy Lutomirski
2018-08-10 15:17 ` Eric W. Biederman
2018-08-10 15:24 ` Al Viro
2018-08-10 15:11 ` Tetsuo Handa
2018-08-10 15:13 ` David Howells
2018-08-10 15:16 ` Al Viro
2018-08-11 1:05 ` Eric W. Biederman
2018-08-11 1:46 ` Theodore Y. Ts'o
2018-08-11 4:48 ` Eric W. Biederman
2018-08-11 17:47 ` Casey Schaufler
2018-08-15 4:03 ` Eric W. Biederman
2018-08-11 1:58 ` Al Viro
2018-08-11 2:17 ` Al Viro
2018-08-11 4:43 ` Eric W. Biederman
2018-08-13 12:54 ` Miklos Szeredi
2018-08-10 15:11 ` David Howells
2018-08-10 15:39 ` Theodore Y. Ts'o
2018-08-10 15:55 ` Casey Schaufler
2018-08-10 16:11 ` David Howells
2018-08-10 18:00 ` Eric W. Biederman
2018-08-10 15:53 ` David Howells
2018-08-10 16:14 ` Theodore Y. Ts'o
2018-08-10 20:06 ` Andy Lutomirski
2018-08-10 20:46 ` Theodore Y. Ts'o
2018-08-10 22:12 ` Darrick J. Wong
2018-08-10 23:54 ` Theodore Y. Ts'o
2018-08-11 0:38 ` Darrick J. Wong
2018-08-11 1:32 ` Eric W. Biederman
2018-08-13 16:35 ` Alan Cox
2018-08-13 16:48 ` Andy Lutomirski
2018-08-13 17:29 ` Al Viro
2018-08-13 19:00 ` James Morris
2018-08-13 19:20 ` Casey Schaufler
2018-08-15 23:29 ` Serge E. Hallyn
2018-08-11 0:28 ` Eric W. Biederman
2018-08-11 1:19 ` Eric W. Biederman
2018-08-11 7:29 ` David Howells
2018-08-11 16:31 ` Andy Lutomirski
2018-08-11 16:51 ` Al Viro
2018-08-15 16:31 ` Should we split the network filesystem setup into two phases? David Howells
2018-08-15 16:51 ` Andy Lutomirski
2018-08-16 3:51 ` Steve French
2018-08-16 5:06 ` Eric W. Biederman
2018-08-16 16:24 ` Steve French
2018-08-16 17:21 ` Eric W. Biederman
2018-08-16 17:23 ` Aurélien Aptel
2018-08-16 18:36 ` Steve French
2018-08-17 23:11 ` Al Viro
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