Commit 5fee64fc authored by Christoph Hellwig's avatar Christoph Hellwig
Browse files

init: add an init_mknod helper 



Add a simple helper to mknod with a kernel space file name and switch
the early init code over to it.  Remove the now unused ksys_mknod.

Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
parent 83ff98c3

fs/init.c

+25 −0
Original line number Diff line number Diff line
@@ -122,6 +122,31 @@ int __init init_eaccess(const char *filename) 
	return error;

}



int __init init_mknod(const char *filename, umode_t mode, unsigned int dev)

{

	struct dentry *dentry;

	struct path path;

	int error;



	if (S_ISFIFO(mode) || S_ISSOCK(mode))

		dev = 0;

	else if (!(S_ISBLK(mode) || S_ISCHR(mode)))

		return -EINVAL;



	dentry = kern_path_create(AT_FDCWD, filename, &path, 0);

	if (IS_ERR(dentry))

		return PTR_ERR(dentry);



	if (!IS_POSIXACL(path.dentry->d_inode))

		mode &= ~current_umask();

	error = security_path_mknod(&path, dentry, mode, dev);

	if (!error)

		error = vfs_mknod(path.dentry->d_inode, dentry, mode,

				  new_decode_dev(dev));

	done_path_create(&path, dentry);

	return error;

}



int __init init_link(const char *oldname, const char *newname)

{

	struct dentry *new_dentry;

fs/internal.h

+0 −2
Original line number Diff line number Diff line
@@ -62,8 +62,6 @@ extern int filename_lookup(int dfd, struct filename *name, unsigned flags, 
			   struct path *path, struct path *root);

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

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

long do_mknodat(int dfd, const char __user *filename, umode_t mode,

		unsigned int dev);

long do_rmdir(int dfd, struct filename *name);

long do_unlinkat(int dfd, struct filename *name);

int may_linkat(struct path *link);

fs/namei.c

+1 −1
Original line number Diff line number Diff line
@@ -3564,7 +3564,7 @@ static int may_mknod(umode_t mode) 
	}

}



long do_mknodat(int dfd, const char __user *filename, umode_t mode,

static long do_mknodat(int dfd, const char __user *filename, umode_t mode,

		unsigned int dev)

{

	struct dentry *dentry;

include/linux/init_syscalls.h

+1 −0
Original line number Diff line number Diff line
@@ -8,6 +8,7 @@ int __init init_chroot(const char *filename); 
int __init init_chown(const char *filename, uid_t user, gid_t group, int flags);

int __init init_chmod(const char *filename, umode_t mode);

int __init init_eaccess(const char *filename);

int __init init_mknod(const char *filename, umode_t mode, unsigned int dev);

int __init init_link(const char *oldname, const char *newname);

int __init init_symlink(const char *oldname, const char *newname);

int __init init_unlink(const char *pathname);

include/linux/syscalls.h

+0 −9
Original line number Diff line number Diff line
@@ -1270,15 +1270,6 @@ int compat_ksys_ipc(u32 call, int first, int second, 
 * The following kernel syscall equivalents are just wrappers to fs-internal

 * functions. Therefore, provide stubs to be inlined at the callsites.

 */

extern long do_mknodat(int dfd, const char __user *filename, umode_t mode,

		       unsigned int dev);



static inline long ksys_mknod(const char __user *filename, umode_t mode,

			      unsigned int dev)

{

	return do_mknodat(AT_FDCWD, filename, mode, dev);

}



extern int do_fchownat(int dfd, const char __user *filename, uid_t user,

		       gid_t group, int flag);

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