Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4

[pandora-kernel.git] / fs / ext4 / ioctl.c

diff --git a/fs/ext4/ioctl.c b/fs/ext4/ioctl.c
index a84faa1..808c554 100644 (file)
--- a/fs/ext4/ioctl.c
+++ b/fs/ext4/ioctl.c
@@ -334,16 +334,22 @@ mext_out:
        case FITRIM:
        {
                struct super_block *sb = inode->i_sb;
+               struct request_queue *q = bdev_get_queue(sb->s_bdev);
                struct fstrim_range range;
                int ret = 0;
 
                if (!capable(CAP_SYS_ADMIN))
                        return -EPERM;
 
+               if (!blk_queue_discard(q))
+                       return -EOPNOTSUPP;
+
                if (copy_from_user(&range, (struct fstrim_range *)arg,
                    sizeof(range)))
                        return -EFAULT;
 
+               range.minlen = max((unsigned int)range.minlen,
+                                  q->limits.discard_granularity);
                ret = ext4_trim_fs(sb, &range);
                if (ret < 0)
                        return ret;
@@ -421,6 +427,7 @@ long ext4_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
                return err;
        }
        case EXT4_IOC_MOVE_EXT:
+       case FITRIM:
                break;
        default:
                return -ENOIOCTLCMD;