diff --git a/arch/alpha/kernel/osf_sys.c b/arch/alpha/kernel/osf_sys.c
index 8bbeebb73cf03309aa2654cbd67c00ad32d92eb9..d257293401e28ada112400d957765ca0891c4b29 100644
--- a/arch/alpha/kernel/osf_sys.c
+++ b/arch/alpha/kernel/osf_sys.c
@@ -36,6 +36,7 @@
#include <linux/types.h>
#include <linux/ipc.h>
#include <linux/namei.h>
+#include <linux/mount.h>
#include <linux/uio.h>
#include <linux/vfs.h>
#include <linux/rcupdate.h>
diff --git a/fs/fsopen.c b/fs/fsopen.c
index 27a890aa493abf89960c374eaeab31192b662d73..fc9d2d9fd234e7abdbdca196e70842a1a13d8380 100644
--- a/fs/fsopen.c
+++ b/fs/fsopen.c
@@ -119,7 +119,7 @@ SYSCALL_DEFINE2(fsopen, const char __user *, _fs_name, unsigned int, flags)
const char *fs_name;
int ret;
- if (!ns_capable(current->nsproxy->mnt_ns->user_ns, CAP_SYS_ADMIN))
+ if (!may_mount())
return -EPERM;
if (flags & ~FSOPEN_CLOEXEC)
@@ -162,7 +162,7 @@ SYSCALL_DEFINE3(fspick, int, dfd, const char __user *, path, unsigned int, flags
unsigned int lookup_flags;
int ret;
- if (!ns_capable(current->nsproxy->mnt_ns->user_ns, CAP_SYS_ADMIN))
+ if (!may_mount())
return -EPERM;
if ((flags & ~(FSPICK_CLOEXEC |
diff --git a/fs/internal.h b/fs/internal.h
index ad77723779f98e864281b8a5c6406f78db005ea8..87e96b9024ce1db0ee8b6b53a45e0122d7a5eb71 100644
--- a/fs/internal.h
+++ b/fs/internal.h
@@ -84,6 +84,7 @@ extern int __mnt_want_write_file(struct file *);
extern void __mnt_drop_write_file(struct file *);
extern void dissolve_on_fput(struct vfsmount *);
+extern bool may_mount(void);
int path_mount(const char *dev_name, struct path *path,
const char *type_page, unsigned long flags, void *data_page);
diff --git a/fs/namespace.c b/fs/namespace.c
index 41461f55c0390294fd0aa571b897e32419878cf5..e6a7e769d25dd1a9bee1837dd3c8cf1933052e6e 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -1760,7 +1760,7 @@ void __detach_mounts(struct dentry *dentry)
/*
* Is the caller allowed to modify his namespace?
*/
-static inline bool may_mount(void)
+bool may_mount(void)
{
return ns_capable(current->nsproxy->mnt_ns->user_ns, CAP_SYS_ADMIN);
}
diff --git a/fs/nfs/nfs4file.c b/fs/nfs/nfs4file.c
index 7b861e4f0533ac0a83dfa1653e35f4ea36d7c108..03d3a270eff4f128843c8ddd516f5142e4326fad 100644
--- a/fs/nfs/nfs4file.c
+++ b/fs/nfs/nfs4file.c
@@ -328,7 +328,7 @@ static struct file *__nfs42_ssc_open(struct vfsmount *ss_mnt,
char *read_name = NULL;
int len, status = 0;
- server = NFS_SERVER(ss_mnt->mnt_root->d_inode);
+ server = NFS_SB(ss_mnt->mnt_sb);
if (!fattr)
return ERR_PTR(-ENOMEM);
@@ -346,7 +346,7 @@ static struct file *__nfs42_ssc_open(struct vfsmount *ss_mnt,
goto out;
snprintf(read_name, len, SSC_READ_NAME_BODY, read_name_gen++);
- r_ino = nfs_fhget(ss_mnt->mnt_root->d_inode->i_sb, src_fh, fattr);
+ r_ino = nfs_fhget(ss_mnt->mnt_sb, src_fh, fattr);
if (IS_ERR(r_ino)) {
res = ERR_CAST(r_ino);
goto out_free_name;
diff --git a/include/linux/fs.h b/include/linux/fs.h
index d5ae3f3767b2d4b436b9ea6f1d97617c32dbb4e3..9ad5e3520fae577c2a216859aba20f8d26241172 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -2469,22 +2469,11 @@ struct super_block *sget(struct file_system_type *type,
extern int register_filesystem(struct file_system_type *);
extern int unregister_filesystem(struct file_system_type *);
-extern struct vfsmount *kern_mount(struct file_system_type *);
-extern void kern_unmount(struct vfsmount *mnt);
-extern int may_umount_tree(struct vfsmount *);
-extern int may_umount(struct vfsmount *);
-extern long do_mount(const char *, const char __user *,
- const char *, unsigned long, void *);
-extern struct vfsmount *collect_mounts(const struct path *);
-extern void drop_collected_mounts(struct vfsmount *);
-extern int iterate_mounts(int (*)(struct vfsmount *, void *), void *,
- struct vfsmount *);
extern int vfs_statfs(const struct path *, struct kstatfs *);
extern int user_statfs(const char __user *, struct kstatfs *);
extern int fd_statfs(int, struct kstatfs *);
extern int freeze_super(struct super_block *super);
extern int thaw_super(struct super_block *super);
-extern bool our_mnt(struct vfsmount *mnt);
extern __printf(2, 3)
int super_setup_bdi_name(struct super_block *sb, char *fmt, ...);
extern int super_setup_bdi(struct super_block *sb);
diff --git a/include/linux/mount.h b/include/linux/mount.h
index 7f18a7555dff7299b864cb391290aca9f4e48fa8..55a4abaf671550020f5ea00c73c989f50be90ebe 100644
--- a/include/linux/mount.h
+++ b/include/linux/mount.h
@@ -11,17 +11,15 @@
#define _LINUX_MOUNT_H
#include <linux/types.h>
-#include <linux/list.h>
-#include <linux/nodemask.h>
-#include <linux/spinlock.h>
-#include <linux/seqlock.h>
-#include <linux/atomic.h>
+#include <asm/barrier.h>
struct super_block;
-struct vfsmount;
struct dentry;
-struct mnt_namespace;
+struct user_namespace;
+struct file_system_type;
struct fs_context;
+struct file;
+struct path;
#define MNT_NOSUID 0x01
#define MNT_NODEV 0x02
@@ -81,9 +79,6 @@ static inline struct user_namespace *mnt_user_ns(const struct vfsmount *mnt)
return smp_load_acquire(&mnt->mnt_userns);
}
-struct file; /* forward dec */
-struct path;
-
extern int mnt_want_write(struct vfsmount *mnt);
extern int mnt_want_write_file(struct file *file);
extern void mnt_drop_write(struct vfsmount *mnt);
@@ -94,12 +89,10 @@ extern struct vfsmount *mnt_clone_internal(const struct path *path);
extern bool __mnt_is_readonly(struct vfsmount *mnt);
extern bool mnt_may_suid(struct vfsmount *mnt);
-struct path;
extern struct vfsmount *clone_private_mount(const struct path *path);
extern int __mnt_want_write(struct vfsmount *);
extern void __mnt_drop_write(struct vfsmount *);
-struct file_system_type;
extern struct vfsmount *fc_mount(struct fs_context *fc);
extern struct vfsmount *vfs_create_mount(struct fs_context *fc);
extern struct vfsmount *vfs_kern_mount(struct file_system_type *type,
@@ -115,6 +108,18 @@ extern void mark_mounts_for_expiry(struct list_head *mounts);
extern dev_t name_to_dev_t(const char *name);
extern bool path_is_mountpoint(const struct path *path);
+extern bool our_mnt(struct vfsmount *mnt);
+
+extern struct vfsmount *kern_mount(struct file_system_type *);
+extern void kern_unmount(struct vfsmount *mnt);
+extern int may_umount_tree(struct vfsmount *);
+extern int may_umount(struct vfsmount *);
+extern long do_mount(const char *, const char __user *,
+ const char *, unsigned long, void *);
+extern struct vfsmount *collect_mounts(const struct path *);
+extern void drop_collected_mounts(struct vfsmount *);
+extern int iterate_mounts(int (*)(struct vfsmount *, void *), void *,
+ struct vfsmount *);
extern void kern_unmount_array(struct vfsmount *mnt[], unsigned int num);
#endif /* _LINUX_MOUNT_H */
diff --git a/kernel/usermode_driver.c b/kernel/usermode_driver.c
index 9dae1f6487136a3b9132c6f18c5c2aba2a028fc4..8303f4c7ca714a0aa96aeec4be8c8423ce8a200d 100644
--- a/kernel/usermode_driver.c
+++ b/kernel/usermode_driver.c
@@ -28,7 +28,7 @@ static struct vfsmount *blob_to_mnt(const void *data, size_t len, const char *na
file = file_open_root_mnt(mnt, name, O_CREAT | O_WRONLY, 0700);
if (IS_ERR(file)) {
- mntput(mnt);
+ kern_unmount(mnt);
return ERR_CAST(file);
}
@@ -38,7 +38,7 @@ static struct vfsmount *blob_to_mnt(const void *data, size_t len, const char *na
if (err >= 0)
err = -ENOMEM;
filp_close(file, NULL);
- mntput(mnt);
+ kern_unmount(mnt);
return ERR_PTR(err);
}
diff --git a/security/smack/smackfs.c b/security/smack/smackfs.c
index 9e61014073cc847902caaeed7386196a0a21409a..4b58526450d492fc0ce8b8af6388b96e0bbe782d 100644
--- a/security/smack/smackfs.c
+++ b/security/smack/smackfs.c
@@ -23,6 +23,7 @@
#include <linux/ctype.h>
#include <linux/audit.h>
#include <linux/magic.h>
+#include <linux/mount.h>
#include <linux/fs_context.h>
#include "smack.h"