kill vfs_stat_fd / vfs_lstat_fd
There's really no reason to keep vfs_stat_fd and vfs_lstat_fd with
Oleg's vfs_fstatat. Use vfs_fstatat for the few cases having the
directory fd, and switch all others to vfs_stat / vfs_lstat.
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/stat.c b/fs/stat.c
index 5471166..075694e 100644
--- a/fs/stat.c
+++ b/fs/stat.c
@@ -55,46 +55,6 @@
EXPORT_SYMBOL(vfs_getattr);
-int vfs_stat_fd(int dfd, char __user *name, struct kstat *stat)
-{
- struct path path;
- int error;
-
- error = user_path_at(dfd, name, LOOKUP_FOLLOW, &path);
- if (!error) {
- error = vfs_getattr(path.mnt, path.dentry, stat);
- path_put(&path);
- }
- return error;
-}
-
-int vfs_stat(char __user *name, struct kstat *stat)
-{
- return vfs_stat_fd(AT_FDCWD, name, stat);
-}
-
-EXPORT_SYMBOL(vfs_stat);
-
-int vfs_lstat_fd(int dfd, char __user *name, struct kstat *stat)
-{
- struct path path;
- int error;
-
- error = user_path_at(dfd, name, 0, &path);
- if (!error) {
- error = vfs_getattr(path.mnt, path.dentry, stat);
- path_put(&path);
- }
- return error;
-}
-
-int vfs_lstat(char __user *name, struct kstat *stat)
-{
- return vfs_lstat_fd(AT_FDCWD, name, stat);
-}
-
-EXPORT_SYMBOL(vfs_lstat);
-
int vfs_fstat(unsigned int fd, struct kstat *stat)
{
struct file *f = fget(fd);
@@ -106,26 +66,43 @@
}
return error;
}
-
EXPORT_SYMBOL(vfs_fstat);
int vfs_fstatat(int dfd, char __user *filename, struct kstat *stat, int flag)
{
+ struct path path;
int error = -EINVAL;
+ int lookup_flags = 0;
if ((flag & ~AT_SYMLINK_NOFOLLOW) != 0)
goto out;
- if (flag & AT_SYMLINK_NOFOLLOW)
- error = vfs_lstat_fd(dfd, filename, stat);
- else
- error = vfs_stat_fd(dfd, filename, stat);
+ if (!(flag & AT_SYMLINK_NOFOLLOW))
+ lookup_flags |= LOOKUP_FOLLOW;
+
+ error = user_path_at(dfd, filename, lookup_flags, &path);
+ if (error)
+ goto out;
+
+ error = vfs_getattr(path.mnt, path.dentry, stat);
+ path_put(&path);
out:
return error;
}
-
EXPORT_SYMBOL(vfs_fstatat);
+int vfs_stat(char __user *name, struct kstat *stat)
+{
+ return vfs_fstatat(AT_FDCWD, name, stat, 0);
+}
+EXPORT_SYMBOL(vfs_stat);
+
+int vfs_lstat(char __user *name, struct kstat *stat)
+{
+ return vfs_fstatat(AT_FDCWD, name, stat, AT_SYMLINK_NOFOLLOW);
+}
+EXPORT_SYMBOL(vfs_lstat);
+
#ifdef __ARCH_WANT_OLD_STAT
@@ -173,23 +150,25 @@
SYSCALL_DEFINE2(stat, char __user *, filename, struct __old_kernel_stat __user *, statbuf)
{
struct kstat stat;
- int error = vfs_stat_fd(AT_FDCWD, filename, &stat);
+ int error;
- if (!error)
- error = cp_old_stat(&stat, statbuf);
+ error = vfs_stat(filename, &stat);
+ if (error)
+ return error;
- return error;
+ return cp_old_stat(&stat, statbuf);
}
SYSCALL_DEFINE2(lstat, char __user *, filename, struct __old_kernel_stat __user *, statbuf)
{
struct kstat stat;
- int error = vfs_lstat_fd(AT_FDCWD, filename, &stat);
+ int error;
- if (!error)
- error = cp_old_stat(&stat, statbuf);
+ error = vfs_lstat(filename, &stat);
+ if (error)
+ return error;
- return error;
+ return cp_old_stat(&stat, statbuf);
}
SYSCALL_DEFINE2(fstat, unsigned int, fd, struct __old_kernel_stat __user *, statbuf)
@@ -258,23 +237,23 @@
SYSCALL_DEFINE2(newstat, char __user *, filename, struct stat __user *, statbuf)
{
struct kstat stat;
- int error = vfs_stat_fd(AT_FDCWD, filename, &stat);
+ int error = vfs_stat(filename, &stat);
- if (!error)
- error = cp_new_stat(&stat, statbuf);
-
- return error;
+ if (error)
+ return error;
+ return cp_new_stat(&stat, statbuf);
}
SYSCALL_DEFINE2(newlstat, char __user *, filename, struct stat __user *, statbuf)
{
struct kstat stat;
- int error = vfs_lstat_fd(AT_FDCWD, filename, &stat);
+ int error;
- if (!error)
- error = cp_new_stat(&stat, statbuf);
+ error = vfs_lstat(filename, &stat);
+ if (error)
+ return error;
- return error;
+ return cp_new_stat(&stat, statbuf);
}
#if !defined(__ARCH_WANT_STAT64) || defined(__ARCH_WANT_SYS_NEWFSTATAT)