Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753438Ab0FMKCb (ORCPT ); Sun, 13 Jun 2010 06:02:31 -0400 Received: from smtp.nokia.com ([192.100.122.230]:59895 "EHLO mgw-mx03.nokia.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753260Ab0FMKCO (ORCPT ); Sun, 13 Jun 2010 06:02:14 -0400 Message-ID: <4C14AC83.8070305@nokia.com> Date: Sun, 13 Jun 2010 13:01:39 +0300 From: Adrian Hunter User-Agent: Thunderbird 2.0.0.24 (X11/20100411) MIME-Version: 1.0 To: jens.axboe@oracle.com CC: hch@lst.de, Andrew Morton , Kyungmin Park , LKML , "linux-mmc@vger.kernel.org" , Madhusudhan Chikkature Subject: [PATCH V2 1/4] block: Add BLKSECDISCARD Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-OriginalArrivalTime: 13 Jun 2010 10:01:40.0000 (UTC) FILETIME=[6B0A1A00:01CB0ADF] X-Nokia-AV: Clean Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2208 Lines: 64 >From 2bca77333187190bacb3e8b6f79a51ee11be62b5 Mon Sep 17 00:00:00 2001 From: Adrian Hunter Date: Thu, 3 Jun 2010 10:46:04 +0300 Subject: [PATCH 1/4] block: Add BLKSECDISCARD eMMC v4.4 cards can provide a secure erase operation which guarantees that all copies of the discarded sectors (for example created by garbage collection) will also be erased. For this a new ioctl BLKSECDISCARD is added. Signed-off-by: Adrian Hunter --- block/compat_ioctl.c | 1 + block/ioctl.c | 5 +++++ include/linux/fs.h | 1 + 3 files changed, 7 insertions(+), 0 deletions(-) diff --git a/block/compat_ioctl.c b/block/compat_ioctl.c index f26051f..24a146d 100644 --- a/block/compat_ioctl.c +++ b/block/compat_ioctl.c @@ -753,6 +753,7 @@ long compat_blkdev_ioctl(struct file *file, unsigned cmd, unsigned long arg) case BLKFLSBUF: case BLKROSET: case BLKDISCARD: + case BLKSECDISCARD: /* * the ones below are implemented in blkdev_locked_ioctl, * but we call blkdev_ioctl, which gets the lock for us diff --git a/block/ioctl.c b/block/ioctl.c index e8eb679..bc5c19c 100644 --- a/block/ioctl.c +++ b/block/ioctl.c @@ -238,6 +238,11 @@ int blkdev_ioctl(struct block_device *bdev, fmode_t mode, unsigned cmd, return blk_ioctl_discard(bdev, range[0], range[1]); } + case BLKSECDISCARD: + if (!(mode & FMODE_WRITE)) + return -EBADF; + return __blkdev_driver_ioctl(bdev, mode, cmd, arg); + case HDIO_GETGEO: { struct hd_geometry geo; diff --git a/include/linux/fs.h b/include/linux/fs.h index 471e1ff..ed06568 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -309,6 +309,7 @@ struct inodes_stat_t { #define BLKALIGNOFF _IO(0x12,122) #define BLKPBSZGET _IO(0x12,123) #define BLKDISCARDZEROES _IO(0x12,124) +#define BLKSECDISCARD _IO(0x12,125) #define BMAP_IOCTL 1 /* obsolete - kept for compatibility */ #define FIBMAP _IO(0x00,1) /* bmap access */ -- 1.6.3.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/