Add a simple helper to chmod with a kernel space file name and switch
the early init code over to it.
Signed-off-by: Christoph Hellwig <hch@xxxxxx>
---
fs/internal.h | 2 +-
fs/open.c | 4 ++--
include/linux/syscalls.h | 7 -------
init/do_mounts.h | 1 +
init/fs.c | 13 +++++++++++++
init/initramfs.c | 4 ++--
6 files changed, 19 insertions(+), 12 deletions(-)
diff --git a/fs/internal.h b/fs/internal.h
index 4a66730fabefa7..585968c0286cf7 100644
--- a/fs/internal.h
+++ b/fs/internal.h
@@ -126,7 +126,7 @@ extern struct open_how build_open_how(int flags, umode_t mode);
extern int build_open_flags(const struct open_how *how, struct open_flags *op);
long do_sys_ftruncate(unsigned int fd, loff_t length, int small);
-int do_fchmodat(int dfd, const char __user *filename, umode_t mode);
+int chmod_common(const struct path *path, umode_t mode);
int do_fchownat(int dfd, const char __user *filename, uid_t user, gid_t group,
int flag);
int chown_common(const struct path *path, uid_t user, gid_t group);
diff --git a/fs/open.c b/fs/open.c
index 49960a1248f14b..7ba89eae46c560 100644
--- a/fs/open.c
+++ b/fs/open.c
@@ -563,7 +563,7 @@ SYSCALL_DEFINE1(chroot, const char __user *, filename)
return error;
}
-static int chmod_common(const struct path *path, umode_t mode)
+int chmod_common(const struct path *path, umode_t mode)
{
struct inode *inode = path->dentry->d_inode;
struct inode *delegated_inode = NULL;
@@ -610,7 +610,7 @@ SYSCALL_DEFINE2(fchmod, unsigned int, fd, umode_t, mode)
return err;
}
-int do_fchmodat(int dfd, const char __user *filename, umode_t mode)
+static int do_fchmodat(int dfd, const char __user *filename, umode_t mode)
{
struct path path;
int error;
diff --git a/include/linux/syscalls.h b/include/linux/syscalls.h
index e89d62e944dc0e..8b71fa321ca20c 100644
--- a/include/linux/syscalls.h
+++ b/include/linux/syscalls.h
@@ -1304,13 +1304,6 @@ static inline long ksys_link(const char __user *oldname,
return do_linkat(AT_FDCWD, oldname, AT_FDCWD, newname, 0);
}
-extern int do_fchmodat(int dfd, const char __user *filename, umode_t mode);
-
-static inline int ksys_chmod(const char __user *filename, umode_t mode)
-{
- return do_fchmodat(AT_FDCWD, filename, mode);
-}
-
long do_faccessat(int dfd, const char __user *filename, int mode, int flags);
static inline long ksys_access(const char __user *filename, int mode)
diff --git a/init/do_mounts.h b/init/do_mounts.h
index db42564080a2f9..b323d9755d7e5e 100644
--- a/init/do_mounts.h
+++ b/init/do_mounts.h
@@ -14,6 +14,7 @@ int __init init_mount(const char *dev_name, const char *dir_name,
int __init init_chdir(const char *filename);
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_unlink(const char *pathname);
int __init init_rmdir(const char *pathname);
diff --git a/init/fs.c b/init/fs.c
index 30000b7097b9f0..c636f25c9a6d69 100644
--- a/init/fs.c
+++ b/init/fs.c
@@ -77,6 +77,19 @@ int __init init_chown(const char *filename, uid_t user, gid_t group, int flags)
return error;
}
+int __init init_chmod(const char *filename, umode_t mode)
+{
+ struct path path;
+ int error;
+
+ error = kern_path(filename, LOOKUP_FOLLOW, &path);
+ if (error)
+ return error;
+ error = chmod_common(&path, mode);
+ path_put(&path);
+ return error;
+}
+
int __init init_unlink(const char *pathname)
{
return do_unlinkat(AT_FDCWD, getname_kernel(pathname));
diff --git a/init/initramfs.c b/init/initramfs.c
index 076413dbe8bcf3..771da27e87afa1 100644
--- a/init/initramfs.c
+++ b/init/initramfs.c
@@ -354,14 +354,14 @@ static int __init do_name(void)
} else if (S_ISDIR(mode)) {
ksys_mkdir(collected, mode);
init_chown(collected, uid, gid, 0);
- ksys_chmod(collected, mode);
+ init_chmod(collected, mode);
dir_add(collected, mtime);
} else if (S_ISBLK(mode) || S_ISCHR(mode) ||
S_ISFIFO(mode) || S_ISSOCK(mode)) {
if (maybe_link() == 0) {
ksys_mknod(collected, mode, rdev);
init_chown(collected, uid, gid, AT_SYMLINK_NOFOLLOW);
- ksys_chmod(collected, mode);
+ init_chmod(collected, mode);
do_utime(collected, mtime);
}
}
--
2.27.0
