vfs: Suppress MS_* flag defs within the kernel unless explicitly enabled
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> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Reviewed-by: David Howells <dhowells@redhat.com>
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@ -19,6 +19,7 @@
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#include <linux/of_fdt.h>
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#include <linux/of.h>
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#include <linux/cache.h>
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#include <uapi/linux/mount.h>
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#include <asm/sections.h>
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#include <asm/arcregs.h>
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#include <asm/tlb.h>
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@ -24,6 +24,7 @@
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#include <linux/root_dev.h>
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#include <linux/screen_info.h>
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#include <linux/memblock.h>
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#include <uapi/linux/mount.h>
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#include <asm/setup.h>
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#include <asm/system_info.h>
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@ -32,6 +32,7 @@
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#include <linux/of.h>
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#include <linux/of_fdt.h>
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#include <linux/uaccess.h>
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#include <uapi/linux/mount.h>
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#include <asm/io.h>
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#include <asm/page.h>
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#include <asm/elf.h>
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@ -34,6 +34,7 @@
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#include <linux/kdebug.h>
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#include <linux/export.h>
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#include <linux/start_kernel.h>
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#include <uapi/linux/mount.h>
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#include <asm/io.h>
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#include <asm/processor.h>
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@ -33,6 +33,7 @@
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#include <linux/module.h>
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#include <linux/start_kernel.h>
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#include <linux/memblock.h>
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#include <uapi/linux/mount.h>
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#include <asm/io.h>
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#include <asm/processor.h>
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@ -50,6 +50,7 @@
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#include <linux/kvm_para.h>
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#include <linux/dma-contiguous.h>
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#include <xen/xen.h>
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#include <uapi/linux/mount.h>
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#include <linux/errno.h>
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#include <linux/kernel.h>
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@ -25,6 +25,7 @@
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#include <linux/sched.h>
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#include <linux/slab.h>
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#include <linux/kthread.h>
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#include <uapi/linux/mount.h>
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#include "base.h"
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static struct task_struct *thread;
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@ -26,6 +26,7 @@
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#include <linux/memblock.h>
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#include <linux/task_work.h>
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#include <linux/sched/task.h>
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#include <uapi/linux/mount.h>
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#include "pnode.h"
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#include "internal.h"
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@ -10,6 +10,7 @@
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#include <linux/mount.h>
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#include <linux/fs.h>
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#include <linux/nsproxy.h>
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#include <uapi/linux/mount.h>
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#include "internal.h"
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#include "pnode.h"
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@ -35,6 +35,7 @@
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#include <linux/fsnotify.h>
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#include <linux/lockdep.h>
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#include <linux/user_namespace.h>
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#include <uapi/linux/mount.h>
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#include "internal.h"
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static int thaw_super_locked(struct super_block *sb);
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@ -14,6 +14,11 @@
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#include <linux/ioctl.h>
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#include <linux/types.h>
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/* Use of MS_* flags within the kernel is restricted to core mount(2) code. */
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#if !defined(__KERNEL__)
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#include <linux/mount.h>
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#endif
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/*
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* It's silly to have NR_OPEN bigger than NR_FILE, but you can change
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* the file limit at runtime and only root can increase the per-process
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#define NR_FILE 8192 /* this can well be larger on a larger system */
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/*
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* These are the fs-independent mount-flags: up to 32 flags are supported
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*/
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#define MS_RDONLY 1 /* Mount read-only */
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#define MS_NOSUID 2 /* Ignore suid and sgid bits */
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#define MS_NODEV 4 /* Disallow access to device special files */
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#define MS_NOEXEC 8 /* Disallow program execution */
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#define MS_SYNCHRONOUS 16 /* Writes are synced at once */
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#define MS_REMOUNT 32 /* Alter flags of a mounted FS */
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#define MS_MANDLOCK 64 /* Allow mandatory locks on an FS */
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#define MS_DIRSYNC 128 /* Directory modifications are synchronous */
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#define MS_NOATIME 1024 /* Do not update access times. */
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#define MS_NODIRATIME 2048 /* Do not update directory access times */
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#define MS_BIND 4096
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#define MS_MOVE 8192
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#define MS_REC 16384
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#define MS_VERBOSE 32768 /* War is peace. Verbosity is silence.
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MS_VERBOSE is deprecated. */
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#define MS_SILENT 32768
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#define MS_POSIXACL (1<<16) /* VFS does not apply the umask */
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#define MS_UNBINDABLE (1<<17) /* change to unbindable */
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#define MS_PRIVATE (1<<18) /* change to private */
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#define MS_SLAVE (1<<19) /* change to slave */
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#define MS_SHARED (1<<20) /* change to shared */
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#define MS_RELATIME (1<<21) /* Update atime relative to mtime/ctime. */
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#define MS_KERNMOUNT (1<<22) /* this is a kern_mount call */
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#define MS_I_VERSION (1<<23) /* Update inode I_version field */
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#define MS_STRICTATIME (1<<24) /* Always perform atime updates */
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#define MS_LAZYTIME (1<<25) /* Update the on-disk [acm]times lazily */
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/* These sb flags are internal to the kernel */
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#define MS_SUBMOUNT (1<<26)
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#define MS_NOREMOTELOCK (1<<27)
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#define MS_NOSEC (1<<28)
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#define MS_BORN (1<<29)
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#define MS_ACTIVE (1<<30)
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#define MS_NOUSER (1<<31)
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/*
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* Superblock flags that can be altered by MS_REMOUNT
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*/
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#define MS_RMT_MASK (MS_RDONLY|MS_SYNCHRONOUS|MS_MANDLOCK|MS_I_VERSION|\
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MS_LAZYTIME)
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/*
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* Old magic mount flag and mask
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*/
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#define MS_MGC_VAL 0xC0ED0000
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#define MS_MGC_MSK 0xffff0000
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/*
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* Structure for FS_IOC_FSGETXATTR[A] and FS_IOC_FSSETXATTR.
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*/
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58
include/uapi/linux/mount.h
Normal file
58
include/uapi/linux/mount.h
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#ifndef _UAPI_LINUX_MOUNT_H
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#define _UAPI_LINUX_MOUNT_H
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/*
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* These are the fs-independent mount-flags: up to 32 flags are supported
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*
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* Usage of these is restricted within the kernel to core mount(2) code and
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* callers of sys_mount() only. Filesystems should be using the SB_*
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* equivalent instead.
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*/
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#define MS_RDONLY 1 /* Mount read-only */
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#define MS_NOSUID 2 /* Ignore suid and sgid bits */
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#define MS_NODEV 4 /* Disallow access to device special files */
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#define MS_NOEXEC 8 /* Disallow program execution */
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#define MS_SYNCHRONOUS 16 /* Writes are synced at once */
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#define MS_REMOUNT 32 /* Alter flags of a mounted FS */
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#define MS_MANDLOCK 64 /* Allow mandatory locks on an FS */
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#define MS_DIRSYNC 128 /* Directory modifications are synchronous */
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#define MS_NOATIME 1024 /* Do not update access times. */
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#define MS_NODIRATIME 2048 /* Do not update directory access times */
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#define MS_BIND 4096
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#define MS_MOVE 8192
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#define MS_REC 16384
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#define MS_VERBOSE 32768 /* War is peace. Verbosity is silence.
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MS_VERBOSE is deprecated. */
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#define MS_SILENT 32768
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#define MS_POSIXACL (1<<16) /* VFS does not apply the umask */
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#define MS_UNBINDABLE (1<<17) /* change to unbindable */
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#define MS_PRIVATE (1<<18) /* change to private */
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#define MS_SLAVE (1<<19) /* change to slave */
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#define MS_SHARED (1<<20) /* change to shared */
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#define MS_RELATIME (1<<21) /* Update atime relative to mtime/ctime. */
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#define MS_KERNMOUNT (1<<22) /* this is a kern_mount call */
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#define MS_I_VERSION (1<<23) /* Update inode I_version field */
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#define MS_STRICTATIME (1<<24) /* Always perform atime updates */
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#define MS_LAZYTIME (1<<25) /* Update the on-disk [acm]times lazily */
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/* These sb flags are internal to the kernel */
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#define MS_SUBMOUNT (1<<26)
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#define MS_NOREMOTELOCK (1<<27)
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#define MS_NOSEC (1<<28)
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#define MS_BORN (1<<29)
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#define MS_ACTIVE (1<<30)
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#define MS_NOUSER (1<<31)
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/*
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* Superblock flags that can be altered by MS_REMOUNT
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*/
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#define MS_RMT_MASK (MS_RDONLY|MS_SYNCHRONOUS|MS_MANDLOCK|MS_I_VERSION|\
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MS_LAZYTIME)
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/*
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* Old magic mount flag and mask
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*/
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#define MS_MGC_VAL 0xC0ED0000
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#define MS_MGC_MSK 0xffff0000
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#endif /* _UAPI_LINUX_MOUNT_H */
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@ -22,6 +22,7 @@
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#include <linux/nfs_fs.h>
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#include <linux/nfs_fs_sb.h>
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#include <linux/nfs_mount.h>
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#include <uapi/linux/mount.h>
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#include "do_mounts.h"
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#include <linux/sched.h>
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#include <linux/freezer.h>
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#include <linux/kmod.h>
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#include <uapi/linux/mount.h>
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#include "do_mounts.h"
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#include <linux/netfilter_ipv4.h>
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#include <linux/netfilter_ipv6.h>
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#include <net/sock.h>
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#include <uapi/linux/mount.h>
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#include "include/apparmor.h"
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#include "include/apparmorfs.h"
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#include <linux/fs.h>
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#include <linux/mount.h>
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#include <linux/namei.h>
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#include <uapi/linux/mount.h>
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#include "include/apparmor.h"
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#include "include/audit.h"
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#include <linux/msg.h>
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#include <linux/shm.h>
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#include <linux/bpf.h>
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#include <uapi/linux/mount.h>
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#include "avc.h"
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#include "objsec.h"
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*/
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#include <linux/slab.h>
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#include <uapi/linux/mount.h>
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#include "common.h"
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/* String table for special mount operations. */
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