fedora core 6 1.2949 + vserver 2.2.0

[linux-2.6.git] / fs / fat / dir.c

diff --git a/fs/fat/dir.c b/fs/fat/dir.c
index 9e6eae9..c16af24 100644 (file)
--- a/fs/fat/dir.c
+++ b/fs/fat/dir.c
@@ -20,6 +20,7 @@
 #include <linux/dirent.h>
 #include <linux/smp_lock.h>
 #include <linux/buffer_head.h>
+#include <linux/compat.h>
 #include <asm/uaccess.h>
 
 static inline loff_t fat_make_i_pos(struct super_block *sb,
@@ -578,7 +579,7 @@ parse_record:
        if (!memcmp(de->name, MSDOS_DOT, MSDOS_NAME))
                inum = inode->i_ino;
        else if (!memcmp(de->name, MSDOS_DOTDOT, MSDOS_NAME)) {
-               inum = parent_ino(filp->f_dentry);
+               inum = parent_ino(filp->f_path.dentry);
        } else {
                loff_t i_pos = fat_make_i_pos(sb, bh, de);
                struct inode *tmp = fat_iget(sb, i_pos);
@@ -642,7 +643,7 @@ out:
 
 static int fat_readdir(struct file *filp, void *dirent, filldir_t filldir)
 {
-       struct inode *inode = filp->f_dentry->d_inode;
+       struct inode *inode = filp->f_path.dentry->d_inode;
        return __fat_readdir(inode, filp, dirent, filldir, 0, 0);
 }
 
@@ -741,10 +742,65 @@ static int fat_dir_ioctl(struct inode * inode, struct file * filp,
        return ret;
 }
 
+#ifdef CONFIG_COMPAT
+#define        VFAT_IOCTL_READDIR_BOTH32       _IOR('r', 1, struct compat_dirent[2])
+#define        VFAT_IOCTL_READDIR_SHORT32      _IOR('r', 2, struct compat_dirent[2])
+
+static long fat_compat_put_dirent32(struct dirent *d,
+                                   struct compat_dirent __user *d32)
+{
+        if (!access_ok(VERIFY_WRITE, d32, sizeof(struct compat_dirent)))
+                return -EFAULT;
+
+        __put_user(d->d_ino, &d32->d_ino);
+        __put_user(d->d_off, &d32->d_off);
+        __put_user(d->d_reclen, &d32->d_reclen);
+        if (__copy_to_user(d32->d_name, d->d_name, d->d_reclen))
+               return -EFAULT;
+
+        return 0;
+}
+
+static long fat_compat_dir_ioctl(struct file *file, unsigned cmd,
+                                unsigned long arg)
+{
+       struct compat_dirent __user *p = compat_ptr(arg);
+       int ret;
+       mm_segment_t oldfs = get_fs();
+       struct dirent d[2];
+
+       switch (cmd) {
+       case VFAT_IOCTL_READDIR_BOTH32:
+               cmd = VFAT_IOCTL_READDIR_BOTH;
+               break;
+       case VFAT_IOCTL_READDIR_SHORT32:
+               cmd = VFAT_IOCTL_READDIR_SHORT;
+               break;
+       default:
+               return -ENOIOCTLCMD;
+       }
+
+       set_fs(KERNEL_DS);
+       lock_kernel();
+       ret = fat_dir_ioctl(file->f_path.dentry->d_inode, file,
+                           cmd, (unsigned long) &d);
+       unlock_kernel();
+       set_fs(oldfs);
+       if (ret >= 0) {
+               ret |= fat_compat_put_dirent32(&d[0], p);
+               ret |= fat_compat_put_dirent32(&d[1], p + 1);
+       }
+       return ret;
+}
+#endif /* CONFIG_COMPAT */
+
 const struct file_operations fat_dir_operations = {
        .read           = generic_read_dir,
        .readdir        = fat_readdir,
        .ioctl          = fat_dir_ioctl,
+#ifdef CONFIG_COMPAT
+       .compat_ioctl   = fat_compat_dir_ioctl,
+#endif
        .fsync          = file_fsync,
 };