Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756898Ab2FEHeW (ORCPT ); Tue, 5 Jun 2012 03:34:22 -0400 Received: from www.piware.de ([213.9.93.70]:57608 "EHLO mail.piware.de" rhost-flags-OK-FAIL-OK-OK) by vger.kernel.org with ESMTP id S1756129Ab2FEHeU (ORCPT ); Tue, 5 Jun 2012 03:34:20 -0400 Date: Tue, 5 Jun 2012 09:27:37 +0200 From: Martin Pitt To: linux-scsi@vger.kernel.org Cc: linux-kernel@vger.kernel.org, David Zeuthen , Kay Sievers Subject: [PATCH 1/1] [SCSI] scsi_debug: Add "removable" parameter Message-ID: <20120605072737.GF3043@piware.de> References: <20120605072528.GE3043@piware.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20120605072528.GE3043@piware.de> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 6528 Lines: 141 Add "removable" module parameter to set the "removable" attribute of any subsequently created debug block device. It is a writable driver option, so that you can switch between removable and "fixed" media block devices in between the add_host calls. This is useful for being able to test the different behaviour/required privileges in e. g. the udisks test suite. Signed-off-by: Martin Pitt Signed-off-by: David Zeuthen --- drivers/scsi/scsi_debug.c | 35 ++++++++++++++++++++++++++++++++--- 1 files changed, 32 insertions(+), 3 deletions(-) diff --git a/drivers/scsi/scsi_debug.c b/drivers/scsi/scsi_debug.c index 182d5a5..6eaa95e 100644 --- a/drivers/scsi/scsi_debug.c +++ b/drivers/scsi/scsi_debug.c @@ -109,6 +109,7 @@ static const char * scsi_debug_version_date = "20100324"; #define DEF_OPT_BLKS 64 #define DEF_PHYSBLK_EXP 0 #define DEF_PTYPE 0 +#define DEF_REMOVABLE 0 #define DEF_SCSI_LEVEL 5 /* INQUIRY, byte2 [5->SPC-3] */ #define DEF_SECTOR_SIZE 512 #define DEF_UNMAP_ALIGNMENT 0 @@ -180,6 +181,7 @@ static int scsi_debug_opt_blks = DEF_OPT_BLKS; static int scsi_debug_opts = DEF_OPTS; static int scsi_debug_physblk_exp = DEF_PHYSBLK_EXP; static int scsi_debug_ptype = DEF_PTYPE; /* SCSI peripheral type (0==disk) */ +static int scsi_debug_removable = DEF_REMOVABLE; static int scsi_debug_scsi_level = DEF_SCSI_LEVEL; static int scsi_debug_sector_size = DEF_SECTOR_SIZE; static int scsi_debug_virtual_gb = DEF_VIRTUAL_GB; @@ -197,7 +199,6 @@ static unsigned int scsi_debug_write_same_length = DEF_WRITESAME_LENGTH; static int scsi_debug_cmnd_count = 0; #define DEV_READONLY(TGT) (0) -#define DEV_REMOVEABLE(TGT) (0) static unsigned int sdebug_store_sectors; static sector_t sdebug_capacity; /* in sectors */ @@ -919,7 +920,7 @@ static int resp_inquiry(struct scsi_cmnd * scp, int target, return ret; } /* drops through here for a standard inquiry */ - arr[1] = DEV_REMOVEABLE(target) ? 0x80 : 0; /* Removable disk */ + arr[1] = scsi_debug_removable ? 0x80 : 0; /* Removable disk */ arr[2] = scsi_debug_scsi_level; arr[3] = 2; /* response_data_format==2 */ arr[4] = SDEBUG_LONG_INQ_SZ - 5; @@ -1211,7 +1212,7 @@ static int resp_format_pg(unsigned char * p, int pcontrol, int target) p[11] = sdebug_sectors_per & 0xff; p[12] = (scsi_debug_sector_size >> 8) & 0xff; p[13] = scsi_debug_sector_size & 0xff; - if (DEV_REMOVEABLE(target)) + if (scsi_debug_removable) p[20] |= 0x20; /* should agree with INQUIRY */ if (1 == pcontrol) memset(p + 2, 0, sizeof(format_pg) - 2); @@ -2754,6 +2755,7 @@ module_param_named(opt_blks, scsi_debug_opt_blks, int, S_IRUGO); module_param_named(opts, scsi_debug_opts, int, S_IRUGO | S_IWUSR); module_param_named(physblk_exp, scsi_debug_physblk_exp, int, S_IRUGO); module_param_named(ptype, scsi_debug_ptype, int, S_IRUGO | S_IWUSR); +module_param_named(removable, scsi_debug_removable, int, S_IRUGO | S_IWUSR); module_param_named(scsi_level, scsi_debug_scsi_level, int, S_IRUGO); module_param_named(sector_size, scsi_debug_sector_size, int, S_IRUGO); module_param_named(unmap_alignment, scsi_debug_unmap_alignment, int, S_IRUGO); @@ -2796,6 +2798,7 @@ MODULE_PARM_DESC(opt_blks, "optimal transfer length in block (def=64)"); MODULE_PARM_DESC(opts, "1->noise, 2->medium_err, 4->timeout, 8->recovered_err... (def=0)"); MODULE_PARM_DESC(physblk_exp, "physical block exponent (def=0)"); MODULE_PARM_DESC(ptype, "SCSI peripheral type(def=0[disk])"); +MODULE_PARM_DESC(removable, "claim to have removable media (def=0)"); MODULE_PARM_DESC(scsi_level, "SCSI level to simulate(def=5[SPC-3])"); MODULE_PARM_DESC(sector_size, "logical block size in bytes (def=512)"); MODULE_PARM_DESC(unmap_alignment, "lowest aligned thin provisioning lba (def=0)"); @@ -3205,6 +3208,25 @@ static ssize_t sdebug_map_show(struct device_driver *ddp, char *buf) } DRIVER_ATTR(map, S_IRUGO, sdebug_map_show, NULL); +static ssize_t sdebug_removable_show(struct device_driver *ddp, + char *buf) +{ + return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_removable); +} +static ssize_t sdebug_removable_store(struct device_driver *ddp, + const char *buf, size_t count) +{ + int n; + + if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) { + scsi_debug_removable = n; + return count; + } + return -EINVAL; +} +DRIVER_ATTR(removable, S_IRUGO | S_IWUSR, sdebug_removable_show, + sdebug_removable_store); + /* Note: The following function creates attribute files in the /sys/bus/pseudo/drivers/scsi_debug directory. The advantage of these @@ -3230,6 +3252,7 @@ static int do_create_driverfs_files(void) ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_num_tgts); ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_ptype); ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_opts); + ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_removable); ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_scsi_level); ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_virtual_gb); ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_vpd_use_hostno); @@ -3255,6 +3278,7 @@ static void do_remove_driverfs_files(void) driver_remove_file(&sdebug_driverfs_driver, &driver_attr_scsi_level); driver_remove_file(&sdebug_driverfs_driver, &driver_attr_opts); driver_remove_file(&sdebug_driverfs_driver, &driver_attr_ptype); + driver_remove_file(&sdebug_driverfs_driver, &driver_attr_removable); driver_remove_file(&sdebug_driverfs_driver, &driver_attr_num_tgts); driver_remove_file(&sdebug_driverfs_driver, &driver_attr_num_parts); driver_remove_file(&sdebug_driverfs_driver, &driver_attr_no_uld); @@ -3325,6 +3349,11 @@ static int __init scsi_debug_init(void) return -EINVAL; } + if (scsi_debug_removable > 1) { + printk(KERN_ERR "scsi_debug_init: removable must be 0 or 1\n"); + return -EINVAL; + } + if (scsi_debug_dev_size_mb < 1) scsi_debug_dev_size_mb = 1; /* force minimum 1 MB ramdisk */ sz = (unsigned long)scsi_debug_dev_size_mb * 1048576; -- 1.7.2.5 -- Martin Pitt | http://www.piware.de Ubuntu Developer (www.ubuntu.com) | Debian Developer (www.debian.org) -- 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/