flags &= ~EXT4_EXTENTS_FL;
}
+ if (flags & EXT4_EOFBLOCKS_FL) {
+ /* we don't support adding EOFBLOCKS flag */
+ if (!(oldflags & EXT4_EOFBLOCKS_FL)) {
+ err = -EOPNOTSUPP;
+ goto flags_out;
+ }
+ } else if (oldflags & EXT4_EOFBLOCKS_FL)
+ ext4_truncate(inode);
+
handle = ext4_journal_start(inode, 1);
if (IS_ERR(handle)) {
err = PTR_ERR(handle);
struct file *donor_filp;
int err;
+ if (!(filp->f_mode & FMODE_READ) ||
+ !(filp->f_mode & FMODE_WRITE))
+ return -EBADF;
+
if (copy_from_user(&me,
(struct move_extent __user *)arg, sizeof(me)))
return -EFAULT;
+ me.moved_len = 0;
donor_filp = fget(me.donor_fd);
if (!donor_filp)
return -EBADF;
- if (!capable(CAP_DAC_OVERRIDE)) {
- if ((current->real_cred->fsuid != inode->i_uid) ||
- !(inode->i_mode & S_IRUSR) ||
- !(donor_filp->f_dentry->d_inode->i_mode &
- S_IRUSR)) {
- fput(donor_filp);
- return -EACCES;
- }
+ if (!(donor_filp->f_mode & FMODE_WRITE)) {
+ err = -EBADF;
+ goto mext_out;
}
+ err = mnt_want_write(filp->f_path.mnt);
+ if (err)
+ goto mext_out;
+
err = ext4_move_extents(filp, donor_filp, me.orig_start,
me.donor_start, me.len, &me.moved_len);
- fput(donor_filp);
-
- if (copy_to_user((struct move_extent *)arg, &me, sizeof(me)))
- return -EFAULT;
+ mnt_drop_write(filp->f_path.mnt);
+ if (me.moved_len > 0)
+ file_remove_suid(donor_filp);
+ if (copy_to_user((struct move_extent __user *)arg,
+ &me, sizeof(me)))
+ err = -EFAULT;
+mext_out:
+ fput(donor_filp);
return err;
}