From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754065Ab1LADXq (ORCPT ); Wed, 30 Nov 2011 22:23:46 -0500 Received: from cdptpa-omtalb.mail.rr.com ([75.180.132.121]:64525 "EHLO cdptpa-omtalb.mail.rr.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753436Ab1LADXp (ORCPT ); Wed, 30 Nov 2011 22:23:45 -0500 X-Authority-Analysis: v=2.0 cv=BK0xXSsG c=1 sm=0 a=QETZmXXmyubuBiJjAgCHWw==:17 a=y8ZX_BOJfaUA:10 a=YU8HmM6wsVwA:10 a=ZPSk82zQDygA:10 a=ayC55rCoAAAA:8 a=xe8BsctaAAAA:8 a=Mz574nbezjJi_xtMRHsA:9 a=UAVRJdkkkM0A:10 a=l_uIMmhx26zkyTVK:21 a=Zqov490u-r5Nc_tb:21 a=QETZmXXmyubuBiJjAgCHWw==:117 X-Cloudmark-Score: 0 X-Originating-IP: 97.103.252.48 Message-ID: <4ED6F340.9050000@cfl.rr.com> Date: Wed, 30 Nov 2011 22:23:44 -0500 From: Phillip Susi User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:7.0.1) Gecko/20110929 Thunderbird/7.0.1 MIME-Version: 1.0 To: linux-kernel@vger.kernel.org Subject: [PATCH 2/2] Add BLKPG_GET_PARTITION operation References: In-Reply-To: X-Enigmail-Version: 1.4a1pre Content-Type: text/plain; charset=ISO-2022-JP Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Add a new operation to the BLKPG ioctl to read the partition. This allows user space to find the current start and length of a partition without having to open the partition and use the long depreciated HDIO_GETGEO ioctl. Signed-off-by: Phillip Susi - --- block/ioctl.c | 15 +++++++++++++++ include/linux/blkpg.h | 1 + 2 files changed, 16 insertions(+), 0 deletions(-) diff --git a/block/ioctl.c b/block/ioctl.c index f97e6a4..3e92f0f 100644 - --- a/block/ioctl.c +++ b/block/ioctl.c @@ -139,6 +139,21 @@ static int blkpg_ioctl(struct block_device *bdev, struct blkpg_ioctl_arg __user disk_put_part(part); mutex_unlock(&bdev->bd_mutex); return 0; + case BLKPG_GET_PARTITION: + mutex_lock(&bdev->bd_mutex); + part = disk_get_part(disk, partno); + if (!part) + { + mutex_unlock(&bdev->bd_mutex); + return -ENXIO; + } + p.start = part->start_sect << 9; + p.length = part->nr_sects << 9; + disk_put_part(part); + mutex_unlock(&bdev->bd_mutex); + if (copy_to_user(a.data, &p, sizeof(struct blkpg_partition))) + return -EFAULT; + return 0; default: return -EINVAL; } diff --git a/include/linux/blkpg.h b/include/linux/blkpg.h index 103da38..26b1aef 100644 - --- a/include/linux/blkpg.h +++ b/include/linux/blkpg.h @@ -41,6 +41,7 @@ struct blkpg_ioctl_arg { #define BLKPG_ADD_PARTITION 1 #define BLKPG_DEL_PARTITION 2 #define BLKPG_RES_PARTITION 3 +#define BLKPG_GET_PARTITION 4 /* Sizes of name fields. Unused at present. */ #define BLKPG_DEVNAMELTH 64 - -- 1.7.5.4 -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAk7W80AACgkQJ4UciIs+XuJHtQCgjsMlhoVgn2ZDOv2nJ2pJNM3j 0psAoIDeUgJKw+eCAeleFNAGuuHy+HBO =mBqW -----END PGP SIGNATURE-----