1 files changed, 58 insertions, 79 deletions

diff --git a/fs/stat.c b/fs/stat.c
index 2db740a0cfb5..075694e31d8b 100644
--- a/fs/stat.c
+++ b/fs/stat.c
@@ -55,59 +55,54 @@ 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)
+int vfs_fstat(unsigned int fd, struct kstat *stat)
 {
-        struct path path;
-        int error;
+        struct file *f = fget(fd);
+        int error = -EBADF;
 
-        error = user_path_at(dfd, name, LOOKUP_FOLLOW, &path);
-        if (!error) {
-                error = vfs_getattr(path.mnt, path.dentry, stat);
-                path_put(&path);
+        if (f) {
+                error = vfs_getattr(f->f_path.mnt, f->f_path.dentry, stat);
+                fput(f);
         }
         return error;
 }
+EXPORT_SYMBOL(vfs_fstat);
 
-int vfs_stat(char __user *name, struct kstat *stat)
+int vfs_fstatat(int dfd, char __user *filename, struct kstat *stat, int flag)
 {
-        return vfs_stat_fd(AT_FDCWD, name, stat);
-}
+        struct path path;
+        int error = -EINVAL;
+        int lookup_flags = 0;
 
-EXPORT_SYMBOL(vfs_stat);
+        if ((flag & ~AT_SYMLINK_NOFOLLOW) != 0)
+                goto out;
 
-int vfs_lstat_fd(int dfd, char __user *name, struct kstat *stat)
-{
-        struct path path;
-        int error;
+        if (!(flag & AT_SYMLINK_NOFOLLOW))
+                lookup_flags |= LOOKUP_FOLLOW;
 
-        error = user_path_at(dfd, name, 0, &path);
-        if (!error) {
-                error = vfs_getattr(path.mnt, path.dentry, stat);
-                path_put(&path);
-        }
+        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_lstat(char __user *name, struct kstat *stat)
+int vfs_stat(char __user *name, struct kstat *stat)
 {
-        return vfs_lstat_fd(AT_FDCWD, name, stat);
+        return vfs_fstatat(AT_FDCWD, name, stat, 0);
 }
+EXPORT_SYMBOL(vfs_stat);
 
-EXPORT_SYMBOL(vfs_lstat);
-
-int vfs_fstat(unsigned int fd, struct kstat *stat)
+int vfs_lstat(char __user *name, struct kstat *stat)
 {
-        struct file *f = fget(fd);
-        int error = -EBADF;
-
-        if (f) {
-                error = vfs_getattr(f->f_path.mnt, f->f_path.dentry, stat);
-                fput(f);
-        }
-        return error;
+        return vfs_fstatat(AT_FDCWD, name, stat, AT_SYMLINK_NOFOLLOW);
 }
+EXPORT_SYMBOL(vfs_lstat);
 
-EXPORT_SYMBOL(vfs_fstat);
 
 #ifdef __ARCH_WANT_OLD_STAT
 
@@ -155,23 +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)
@@ -240,23 +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)
@@ -264,21 +261,12 @@ SYSCALL_DEFINE4(newfstatat, int, dfd, char __user *, filename,
                 struct stat __user *, statbuf, int, flag)
 {
         struct kstat stat;
-        int error = -EINVAL;
-
-        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 (!error)
-                error = cp_new_stat(&stat, statbuf);
+        int error;
 
-out:
-        return error;
+        error = vfs_fstatat(dfd, filename, &stat, flag);
+        if (error)
+                return error;
+        return cp_new_stat(&stat, statbuf);
 }
 #endif
 
@@ -404,21 +392,12 @@ SYSCALL_DEFINE4(fstatat64, int, dfd, char __user *, filename,
                 struct stat64 __user *, statbuf, int, flag)
 {
         struct kstat stat;
-        int error = -EINVAL;
-
-        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 (!error)
-                error = cp_new_stat64(&stat, statbuf);
+        int error;
 
-out:
-        return error;
+        error = vfs_fstatat(dfd, filename, &stat, flag);
+        if (error)
+                return error;
+        return cp_new_stat64(&stat, statbuf);
 }
 #endif /* __ARCH_WANT_STAT64 */