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Date: Wed, 8 Jan 2014 20:15:43 +0000 From: "Nicholas A. Bellinger" <nab@...erainc.com> To: target-devel <target-devel@...r.kernel.org> Cc: linux-scsi <linux-scsi@...r.kernel.org>, linux-kernel <linux-kernel@...r.kernel.org>, "Martin K. Petersen" <martin.petersen@...cle.com>, Christoph Hellwig <hch@....de>, Hannes Reinecke <hare@...e.de>, Sagi Grimberg <sagig@...lanox.com>, Or Gerlitz <ogerlitz@...lanox.com>, Nicholas Bellinger <nab@...ux-iscsi.org> Subject: [PATCH 00/14] target: Initial support for DIF Type1+Type3 emulation From: Nicholas Bellinger <nab@...ux-iscsi.org> Hi MKP & SCSI folks, This series contains initial support for target mode DIF Type1+Type3 emulation within target core, RAMDISK_MCP device backend, and tcm_loop fabric driver. DIF emulation is enabled via a new 'pi_prot_type' device attribute within configfs, which is set after initial device configuration and before target fabric LUN export occurs. The DIF read/write verify emulation has been made generic enough so it can be used by other backend drivers (eg: FILEIO), as well as DIF v2 in the near future. Also note that the majority of the logic has been groked from existing scsi_debug.c code. The current plan is to enable basic support for emulated backends with tcm_loop for v3.14 code, and then move onto IBLOCK backend support (that requires BLOCK layer changes), and then onto other more complex fabric driver support + hardware offloads (iser-target that Sagi + Or are currently working on) and DIF support into KVM guest using virtio-scsi + vhost-scsi. Here is a quick snippet of the code in action with v3.13-rc3: [ 846.774085] scsi8 : TCM_Loopback [ 846.778044] scsi 8:0:1:0: Direct-Access LIO-ORG RAMDISK-MCP 4.0 PQ: 0 ANSI: 5 [ 846.780160] init_tag_map: adjusted depth to 256 [ 846.781309] init_tag_map: adjusted depth to 256 [ 846.782424] init_tag_map: adjusted depth to 256 [ 846.783685] sd 8:0:1:0: Attached scsi generic sg1 type 0 [ 846.783923] sd 8:0:1:0: [sda] Enabling DIF Type 1 protection [ 846.783929] sd 8:0:1:0: [sda] 2097152 512-byte logical blocks: (1.07 GB/1.00 GiB) [ 846.784111] sd 8:0:1:0: [sda] Write Protect is off [ 846.784114] sd 8:0:1:0: [sda] Mode Sense: 43 00 00 08 [ 846.784157] sd 8:0:1:0: [sda] Write cache: disabled, read cache: enabled, doesn't support DPO or FUA [ 846.785357] sda: unknown partition table [ 846.795464] sd 8:0:1:0: [sda] Enabling DIX T10-DIF-TYPE1-CRC protection [ 846.797278] sd 8:0:1:0: [sda] DIF application tag size 2 [ 846.798951] sd 8:0:1:0: [sda] Attached SCSI disk <First 4k WRITE_10 performing Host Generate + Target Verify> [ 901.477786] Entering sd_dif_type1_generate >>>>>>>>>>>>>>> [ 901.477809] SD TYPE1 Generate: sector: 0 guard_tag: 0x5fd1 app_tag: 0x0000 ref_tag: 0 [ 901.477823] SD TYPE1 Generate: sector: 1 guard_tag: 0x41de app_tag: 0x0000 ref_tag: 1 [ 901.477835] SD TYPE1 Generate: sector: 2 guard_tag: 0x27b1 app_tag: 0x0000 ref_tag: 2 [ 901.477848] SD TYPE1 Generate: sector: 3 guard_tag: 0xeb4c app_tag: 0x0000 ref_tag: 3 [ 901.477860] SD TYPE1 Generate: sector: 4 guard_tag: 0x5d81 app_tag: 0x0000 ref_tag: 4 [ 901.477872] SD TYPE1 Generate: sector: 5 guard_tag: 0xda61 app_tag: 0x0000 ref_tag: 5 [ 901.477884] SD TYPE1 Generate: sector: 6 guard_tag: 0x80df app_tag: 0x0000 ref_tag: 6 [ 901.477896] SD TYPE1 Generate: sector: 7 guard_tag: 0x5ede app_tag: 0x0000 ref_tag: 7 [ 901.477940] sd_prep_fn: CDB: 0x2a blk_integrity_rq(rq): 1 [ 901.481576] DIF WRITE sector: 0 guard_tag: 0x5fd1 app_tag: 0x0000 ref_tag: 0 [ 901.481591] DIF WRITE sector: 1 guard_tag: 0x41de app_tag: 0x0000 ref_tag: 1 [ 901.481615] DIF WRITE sector: 2 guard_tag: 0x27b1 app_tag: 0x0000 ref_tag: 2 [ 901.481637] DIF WRITE sector: 3 guard_tag: 0xeb4c app_tag: 0x0000 ref_tag: 3 [ 901.481649] DIF WRITE sector: 4 guard_tag: 0x5d81 app_tag: 0x0000 ref_tag: 4 [ 901.481661] DIF WRITE sector: 5 guard_tag: 0xda61 app_tag: 0x0000 ref_tag: 5 [ 901.481673] DIF WRITE sector: 6 guard_tag: 0x80df app_tag: 0x0000 ref_tag: 6 [ 901.481685] DIF WRITE sector: 7 guard_tag: 0x5ede app_tag: 0x0000 ref_tag: 7 <Subsequent 4k READ_10 performing Target Verify + Host Verify> [ 901.522883] sd_prep_fn: CDB: 0x28 blk_integrity_rq(rq): 1 [ 901.528637] DIF READ sector: 0 guard_tag: 0x5fd1 app_tag: 0x0000 ref_tag: 0 [ 901.528655] DIF READ sector: 1 guard_tag: 0x41de app_tag: 0x0000 ref_tag: 1 [ 901.528667] DIF READ sector: 2 guard_tag: 0x27b1 app_tag: 0x0000 ref_tag: 2 [ 901.528679] DIF READ sector: 3 guard_tag: 0xeb4c app_tag: 0x0000 ref_tag: 3 [ 901.528691] DIF READ sector: 4 guard_tag: 0x5d81 app_tag: 0x0000 ref_tag: 4 [ 901.528703] DIF READ sector: 5 guard_tag: 0xda61 app_tag: 0x0000 ref_tag: 5 [ 901.528715] DIF READ sector: 6 guard_tag: 0x80df app_tag: 0x0000 ref_tag: 6 [ 901.528727] DIF READ sector: 7 guard_tag: 0x5ede app_tag: 0x0000 ref_tag: 7 [ 901.528788] Entering bio_integrity_verify sector: 0 >>>>>>>>>>>>>>>>>>>>>>> [ 901.535807] bio_integrity_verify: bio->bi_idx: 1 bio->bi_vcnt: 1 [ 901.538222] SD TYPE1 Verify sector: 0 guard_tag: 0x5fd1 app_tag: 0x0000 ref_tag: 0 [ 901.538226] SD TYPE1 Verify sector: 1 guard_tag: 0x41de app_tag: 0x0000 ref_tag: 1 [ 901.538230] SD TYPE1 Verify sector: 2 guard_tag: 0x27b1 app_tag: 0x0000 ref_tag: 2 [ 901.538234] SD TYPE1 Verify sector: 3 guard_tag: 0xeb4c app_tag: 0x0000 ref_tag: 3 [ 901.538238] SD TYPE1 Verify sector: 4 guard_tag: 0x5d81 app_tag: 0x0000 ref_tag: 4 [ 901.538241] SD TYPE1 Verify sector: 5 guard_tag: 0xda61 app_tag: 0x0000 ref_tag: 5 [ 901.538245] SD TYPE1 Verify sector: 6 guard_tag: 0x80df app_tag: 0x0000 ref_tag: 6 [ 901.538248] SD TYPE1 Verify sector: 7 guard_tag: 0x5ede app_tag: 0x0000 ref_tag: 7 Please review as v3.14-rc1 code. Thank you, --nab Nicholas Bellinger (14): target: Add DIF related base definitions target: Add DIF CHECK_CONDITION ASC/ASCQ exception cases target/sbc: Add sbc_check_prot + update sbc_parse_cdb for DIF target/sbc: Add DIF TYPE1+TYPE3 read/write verify emulation target/spc: Add protection bit to standard INQUIRY output target/spc: Add protection related bits to INQUIRY EVPD=0x86 target/sbc: Add P_TYPE + PROT_EN bits to READ_CAPACITY_16 target/spc: Expose ATO bit in control mode page target/configfs: Expose protection device attributes target: Add protection SGLs to target_submit_cmd_map_sgls target/rd: Refactor rd_build_device_space + rd_release_device_space target/rd: Add support for protection SGL setup + release target/rd: Add DIF protection into rd_execute_rw tcm_loop: Enable DIF/DIX modes in SCSI host LLD drivers/target/loopback/tcm_loop.c | 12 +- drivers/target/target_core_configfs.c | 12 ++ drivers/target/target_core_device.c | 65 ++++++++ drivers/target/target_core_internal.h | 2 + drivers/target/target_core_rd.c | 264 ++++++++++++++++++++++++++------ drivers/target/target_core_rd.h | 4 + drivers/target/target_core_sbc.c | 224 +++++++++++++++++++++++++++ drivers/target/target_core_spc.c | 27 ++++ drivers/target/target_core_transport.c | 46 +++++- drivers/vhost/scsi.c | 2 +- include/target/target_core_backend.h | 6 + include/target/target_core_base.h | 62 ++++++++ include/target/target_core_fabric.h | 3 +- 13 files changed, 678 insertions(+), 51 deletions(-) -- 1.7.10.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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