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Commit 197df04c authored by Al Viro's avatar Al Viro
Browse files

rename user_path_umountat() to user_path_mountpoint_at() 



... and move the extern from linux/namei.h to fs/internal.h,
along with that of vfs_path_lookup().

Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
parent 35759521

fs/internal.h

+3 −0
Original line number Original line Diff line number Diff line
@@ -45,6 +45,9 @@ extern void __init chrdev_init(void); 
 * namei.c

 * namei.c

 */

 */

extern int __inode_permission(struct inode *, int);

extern int __inode_permission(struct inode *, int);

extern int user_path_mountpoint_at(int, const char __user *, unsigned int, struct path *);

extern int vfs_path_lookup(struct dentry *, struct vfsmount *,

			   const char *, unsigned int, struct path *);





/*

/*

 * namespace.c

 * namespace.c

fs/namei.c

+11 −12
Original line number Original line Diff line number Diff line
@@ -2223,7 +2223,7 @@ user_path_parent(int dfd, const char __user *path, struct nameidata *nd, 
}

}





/**

/**

 * umount_lookup_last - look up last component for umount

 * mountpoint_last - look up last component for umount

 * @nd:   pathwalk nameidata - currently pointing at parent directory of "last"

 * @nd:   pathwalk nameidata - currently pointing at parent directory of "last"

 * @path: pointer to container for result

 * @path: pointer to container for result

 *

 *
@@ -2250,7 +2250,7 @@ user_path_parent(int dfd, const char __user *path, struct nameidata *nd, 
 *         to the link, and nd->path will *not* be put.

 *         to the link, and nd->path will *not* be put.

 */

 */

static int

static int

umount_lookup_last(struct nameidata *nd, struct path *path)

mountpoint_last(struct nameidata *nd, struct path *path)

{

{

	int error = 0;

	int error = 0;

	struct dentry *dentry;

	struct dentry *dentry;
@@ -2312,17 +2312,16 @@ umount_lookup_last(struct nameidata *nd, struct path *path) 
}

}





/**

/**

 * path_umountat - look up a path to be umounted

 * path_mountpoint - look up a path to be umounted

 * @dfd:	directory file descriptor to start walk from

 * @dfd:	directory file descriptor to start walk from

 * @name:	full pathname to walk

 * @name:	full pathname to walk

 * @flags:	lookup flags

 * @flags:	lookup flags

 * @nd:		pathwalk nameidata

 *

 *

 * Look up the given name, but don't attempt to revalidate the last component.

 * Look up the given name, but don't attempt to revalidate the last component.

 * Returns 0 and "path" will be valid on success; Retuns error otherwise.

 * Returns 0 and "path" will be valid on success; Retuns error otherwise.

 */

 */

static int

static int

path_umountat(int dfd, const char *name, struct path *path, unsigned int flags)

path_mountpoint(int dfd, const char *name, struct path *path, unsigned int flags)

{

{

	struct file *base = NULL;

	struct file *base = NULL;

	struct nameidata nd;

	struct nameidata nd;
@@ -2337,7 +2336,7 @@ path_umountat(int dfd, const char *name, struct path *path, unsigned int flags) 
	if (err)

	if (err)

		goto out;

		goto out;





	err = umount_lookup_last(&nd, path);

	err = mountpoint_last(&nd, path);

	while (err > 0) {

	while (err > 0) {

		void *cookie;

		void *cookie;

		struct path link = *path;

		struct path link = *path;
@@ -2348,7 +2347,7 @@ path_umountat(int dfd, const char *name, struct path *path, unsigned int flags) 
		err = follow_link(&link, &nd, &cookie);

		err = follow_link(&link, &nd, &cookie);

		if (err)

		if (err)

			break;

			break;

		err = umount_lookup_last(&nd, path);

		err = mountpoint_last(&nd, path);

		put_link(&nd, &link, cookie);

		put_link(&nd, &link, cookie);

	}

	}

out:

out:
@@ -2362,7 +2361,7 @@ path_umountat(int dfd, const char *name, struct path *path, unsigned int flags) 
}

}





/**

/**

 * user_path_umountat - lookup a path from userland in order to umount it

 * user_path_mountpoint_at - lookup a path from userland in order to umount it

 * @dfd:	directory file descriptor

 * @dfd:	directory file descriptor

 * @name:	pathname from userland

 * @name:	pathname from userland

 * @flags:	lookup flags

 * @flags:	lookup flags
@@ -2376,7 +2375,7 @@ path_umountat(int dfd, const char *name, struct path *path, unsigned int flags) 
 * Returns 0 and populates "path" on success.

 * Returns 0 and populates "path" on success.

 */

 */

int

int

user_path_umountat(int dfd, const char __user *name, unsigned int flags,

user_path_mountpoint_at(int dfd, const char __user *name, unsigned int flags,

			struct path *path)

			struct path *path)

{

{

	struct filename *s = getname(name);

	struct filename *s = getname(name);
@@ -2385,11 +2384,11 @@ user_path_umountat(int dfd, const char __user *name, unsigned int flags, 
	if (IS_ERR(s))

	if (IS_ERR(s))

		return PTR_ERR(s);

		return PTR_ERR(s);





	error = path_umountat(dfd, s->name, path, flags | LOOKUP_RCU);

	error = path_mountpoint(dfd, s->name, path, flags | LOOKUP_RCU);

	if (unlikely(error == -ECHILD))

	if (unlikely(error == -ECHILD))

		error = path_umountat(dfd, s->name, path, flags);

		error = path_mountpoint(dfd, s->name, path, flags);

	if (unlikely(error == -ESTALE))

	if (unlikely(error == -ESTALE))

		error = path_umountat(dfd, s->name, path, flags | LOOKUP_REVAL);

		error = path_mountpoint(dfd, s->name, path, flags | LOOKUP_REVAL);





	if (likely(!error))

	if (likely(!error))

		audit_inode(s, path->dentry, 0);

		audit_inode(s, path->dentry, 0);

fs/namespace.c

+1 −1
Original line number Original line Diff line number Diff line
@@ -1321,7 +1321,7 @@ SYSCALL_DEFINE2(umount, char __user *, name, int, flags) 
	if (!(flags & UMOUNT_NOFOLLOW))

	if (!(flags & UMOUNT_NOFOLLOW))

		lookup_flags |= LOOKUP_FOLLOW;

		lookup_flags |= LOOKUP_FOLLOW;





	retval = user_path_umountat(AT_FDCWD, name, lookup_flags, &path);

	retval = user_path_mountpoint_at(AT_FDCWD, name, lookup_flags, &path);

	if (retval)

	if (retval)

		goto out;

		goto out;

	mnt = real_mount(path.mnt);

	mnt = real_mount(path.mnt);

include/linux/namei.h

+0 −3
Original line number Original line Diff line number Diff line
@@ -58,7 +58,6 @@ enum {LAST_NORM, LAST_ROOT, LAST_DOT, LAST_DOTDOT, LAST_BIND}; 




extern int user_path_at(int, const char __user *, unsigned, struct path *);

extern int user_path_at(int, const char __user *, unsigned, struct path *);

extern int user_path_at_empty(int, const char __user *, unsigned, struct path *, int *empty);

extern int user_path_at_empty(int, const char __user *, unsigned, struct path *, int *empty);

extern int user_path_umountat(int, const char __user *, unsigned int, struct path *);





#define user_path(name, path) user_path_at(AT_FDCWD, name, LOOKUP_FOLLOW, path)

#define user_path(name, path) user_path_at(AT_FDCWD, name, LOOKUP_FOLLOW, path)

#define user_lpath(name, path) user_path_at(AT_FDCWD, name, 0, path)

#define user_lpath(name, path) user_path_at(AT_FDCWD, name, 0, path)
@@ -71,8 +70,6 @@ extern struct dentry *kern_path_create(int, const char *, struct path *, unsigne 
extern struct dentry *user_path_create(int, const char __user *, struct path *, unsigned int);

extern struct dentry *user_path_create(int, const char __user *, struct path *, unsigned int);

extern void done_path_create(struct path *, struct dentry *);

extern void done_path_create(struct path *, struct dentry *);

extern struct dentry *kern_path_locked(const char *, struct path *);

extern struct dentry *kern_path_locked(const char *, struct path *);

extern int vfs_path_lookup(struct dentry *, struct vfsmount *,

			   const char *, unsigned int, struct path *);





extern struct dentry *lookup_one_len(const char *, struct dentry *, int);

extern struct dentry *lookup_one_len(const char *, struct dentry *, int);