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/compat.c b/fs/compat.c
index dda72e267092bcadeeb4ed2af4c1a7b80ef0160b..379a399bf5c33cfd6eb3451f85ba57c16df02c5d 100644 (file)
--- a/fs/compat.c
+++ b/fs/compat.c
@@ -181,22 +181,24 @@ asmlinkage long compat_sys_newstat(char __user * filename,
                struct compat_stat __user *statbuf)
 {
        struct kstat stat;
-       int error = vfs_stat_fd(AT_FDCWD, filename, &stat);
+       int error;
 
-       if (!error)
-               error = cp_compat_stat(&stat, statbuf);
-       return error;
+       error = vfs_stat(filename, &stat);
+       if (error)
+               return error;
+       return cp_compat_stat(&stat, statbuf);
 }
 
 asmlinkage long compat_sys_newlstat(char __user * filename,
                struct compat_stat __user *statbuf)
 {
        struct kstat stat;
-       int error = vfs_lstat_fd(AT_FDCWD, filename, &stat);
+       int error;
 
-       if (!error)
-               error = cp_compat_stat(&stat, statbuf);
-       return error;
+       error = vfs_lstat(filename, &stat);
+       if (error)
+               return error;
+       return cp_compat_stat(&stat, statbuf);
 }
 
 #ifndef __ARCH_WANT_STAT64

diff --git a/fs/stat.c b/fs/stat.c
index 54711662b8558460566a036f39e6ceb8f35faf7c..075694e31d8b62fbcf6c935fd0b74220844abfe6 100644 (file)
--- a/fs/stat.c
+++ b/fs/stat.c
@@ -55,46 +55,6 @@ int vfs_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat)
 
 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 @@ int vfs_fstat(unsigned int fd, struct kstat *stat)
        }
        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 @@ static int cp_old_stat(struct kstat *stat, struct __old_kernel_stat __user * sta
 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 @@ static int cp_new_stat(struct kstat *stat, struct stat __user *statbuf)
 SYSCALL_DEFINE2(newstat, char __user *, filename, struct stat __user *, statbuf)
 {
        struct kstat stat;
-       int error = vfs_stat_fd(AT_FDCWD, filename, &stat);
-
-       if (!error)
-               error = cp_new_stat(&stat, statbuf);
+       int error = vfs_stat(filename, &stat);
 
-       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)

diff --git a/include/linux/fs.h b/include/linux/fs.h
index 257f4d37ad232b9014a72cbc55191f6f9212a43c..8f42b35a7565230dc7d5af358c3bbbdf03b14a2e 100644 (file)
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -2299,8 +2299,6 @@ extern int vfs_readdir(struct file *, filldir_t, void *);
 
 extern int vfs_stat(char __user *, struct kstat *);
 extern int vfs_lstat(char __user *, struct kstat *);
-extern int vfs_stat_fd(int dfd, char __user *, struct kstat *);
-extern int vfs_lstat_fd(int dfd, char __user *, struct kstat *);
 extern int vfs_fstat(unsigned int, struct kstat *);
 extern int vfs_fstatat(int , char __user *, struct kstat *, int);