ext4: Add EXT4_IOC_TRIM ioctl to handle batched discard

[mv-sheeva.git] / fs / ext4 / ioctl.c

diff --git a/fs/ext4/ioctl.c b/fs/ext4/ioctl.c
index 016d0249294ff15d3442061d38050df24b09e50e..eb3bc2fe647e710de889f04da3afaf5821e00556 100644 (file)
--- a/fs/ext4/ioctl.c
+++ b/fs/ext4/ioctl.c
@@ -258,7 +258,7 @@ setversion_out:
                if (me.moved_len > 0)
                        file_remove_suid(donor_filp);
 
-               if (copy_to_user((struct move_extent __user *)arg, 
+               if (copy_to_user((struct move_extent __user *)arg,
                                 &me, sizeof(me)))
                        err = -EFAULT;
 mext_out:
@@ -331,6 +331,30 @@ mext_out:
                return err;
        }
 
+       case FITRIM:
+       {
+               struct super_block *sb = inode->i_sb;
+               struct fstrim_range range;
+               int ret = 0;
+
+               if (!capable(CAP_SYS_ADMIN))
+                       return -EPERM;
+
+               if (copy_from_user(&range, (struct fstrim_range *)arg,
+                   sizeof(range)))
+                       return -EFAULT;
+
+               ret = ext4_trim_fs(sb, &range);
+               if (ret < 0)
+                       return ret;
+
+               if (copy_to_user((struct fstrim_range *)arg, &range,
+                   sizeof(range)))
+                       return -EFAULT;
+
+               return 0;
+       }
+
        default:
                return -ENOTTY;
        }
@@ -373,7 +397,30 @@ long ext4_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
        case EXT4_IOC32_SETRSVSZ:
                cmd = EXT4_IOC_SETRSVSZ;
                break;
-       case EXT4_IOC_GROUP_ADD:
+       case EXT4_IOC32_GROUP_ADD: {
+               struct compat_ext4_new_group_input __user *uinput;
+               struct ext4_new_group_input input;
+               mm_segment_t old_fs;
+               int err;
+
+               uinput = compat_ptr(arg);
+               err = get_user(input.group, &uinput->group);
+               err |= get_user(input.block_bitmap, &uinput->block_bitmap);
+               err |= get_user(input.inode_bitmap, &uinput->inode_bitmap);
+               err |= get_user(input.inode_table, &uinput->inode_table);
+               err |= get_user(input.blocks_count, &uinput->blocks_count);
+               err |= get_user(input.reserved_blocks,
+                               &uinput->reserved_blocks);
+               if (err)
+                       return -EFAULT;
+               old_fs = get_fs();
+               set_fs(KERNEL_DS);
+               err = ext4_ioctl(file, EXT4_IOC_GROUP_ADD,
+                                (unsigned long) &input);
+               set_fs(old_fs);
+               return err;
+       }
+       case EXT4_IOC_MOVE_EXT:
                break;
        default:
                return -ENOIOCTLCMD;