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From: Christoph Hellwig <hch@lst.de>
To: Max Gurtovoy <maxg@mellanox.com>
Cc: sagi@grimberg.me, vladimirk@mellanox.com, idanb@mellanox.com,
	israelr@mellanox.com, linux-nvme@lists.infradead.org,
	shlomin@mellanox.com, oren@mellanox.com,
	martin.petersen@oracle.com, kbusch@kernel.org, hch@lst.de
Subject: Re: [PATCH 06/15] block: Introduce BIP_NOMAP_INTEGRITY bip_flag
Date: Tue, 5 Nov 2019 18:52:07 +0100
Message-ID: <20191105175207.GD18972@lst.de> (raw)
In-Reply-To: <20191105162026.183901-8-maxg@mellanox.com>

Please also sends this to Martin.  In fact adding him to the whole
series might help you to get some good feedback.

On Tue, Nov 05, 2019 at 06:20:17PM +0200, Max Gurtovoy wrote:
> From: Israel Rukshin <israelr@mellanox.com>
> 
> It means that reftag shouldn't be remapped. This flag will be used in
> case some other layer did the reftag remapping (e.g. in NVMe/RDMA the
> initiator controller performs the remapping so target side shouldn't
> map it again).

> 
> Signed-off-by: Israel Rukshin <israelr@mellanox.com>
> Reviewed-by: Max Gurtovoy <maxg@mellanox.com>
> ---
>  block/t10-pi.c      | 7 +++++++
>  include/linux/bio.h | 1 +
>  2 files changed, 8 insertions(+)
> 
> diff --git a/block/t10-pi.c b/block/t10-pi.c
> index f4907d9..6de380b 100644
> --- a/block/t10-pi.c
> +++ b/block/t10-pi.c
> @@ -144,6 +144,9 @@ static void t10_pi_type1_prepare(struct request *rq)
>  		/* Already remapped? */
>  		if (bip->bip_flags & BIP_MAPPED_INTEGRITY)
>  			break;
> +		/* No need to remap */
> +		if (bip->bip_flags & BIP_NOMAP_INTEGRITY)
> +			break;
>  
>  		bip_for_each_vec(iv, bip, iter) {
>  			void *p, *pmap;
> @@ -193,6 +196,10 @@ static void t10_pi_type1_complete(struct request *rq, unsigned int nr_bytes)
>  		struct bio_vec iv;
>  		struct bvec_iter iter;
>  
> +		/* No need to remap */
> +		if (bip->bip_flags & BIP_NOMAP_INTEGRITY)
> +			break;
> +
>  		bip_for_each_vec(iv, bip, iter) {
>  			void *p, *pmap;
>  			unsigned int j;
> diff --git a/include/linux/bio.h b/include/linux/bio.h
> index 3cdb84c..2ba09e6 100644
> --- a/include/linux/bio.h
> +++ b/include/linux/bio.h
> @@ -299,6 +299,7 @@ enum bip_flags {
>  	BIP_CTRL_NOCHECK	= 1 << 2, /* disable HBA integrity checking */
>  	BIP_DISK_NOCHECK	= 1 << 3, /* disable disk integrity checking */
>  	BIP_IP_CHECKSUM		= 1 << 4, /* IP checksum */
> +	BIP_NOMAP_INTEGRITY	= 1 << 5, /* ref tag shouldn't be remapped */
>  };
>  
>  /*
> -- 
> 1.8.3.1
---end quoted text---

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Thread overview: 52+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-11-05 16:20 [PATCH 00/15] nvme-rdma/nvmet-rdma: Add metadata/T10-PI support Max Gurtovoy
2019-11-05 16:20 ` [PATCH] nvme-cli/fabrics: Add pi_enable param to connect cmd Max Gurtovoy
2019-11-07  2:36   ` Martin K. Petersen
2019-11-07 12:02     ` Max Gurtovoy
2019-11-09  1:55       ` Martin K. Petersen
2019-11-10  9:25         ` Max Gurtovoy
2019-11-12 17:47           ` Sagi Grimberg
2019-11-12 18:14             ` James Smart
2019-11-12 18:23               ` Sagi Grimberg
2019-11-05 16:20 ` [PATCH 01/15] nvme-fabrics: allow user enabling metadata/T10-PI support Max Gurtovoy
2019-11-12 17:48   ` Sagi Grimberg
2019-11-05 16:20 ` [PATCH 02/15] nvme: Fail __nvme_revalidate_disk in case of a spec violation Max Gurtovoy
2019-11-05 17:49   ` Christoph Hellwig
2019-11-12 17:52     ` Sagi Grimberg
2019-11-05 16:20 ` [PATCH 03/15] nvme: Introduce max_integrity_segments ctrl attribute Max Gurtovoy
2019-11-05 17:49   ` Christoph Hellwig
2019-11-12 17:53   ` Sagi Grimberg
2019-11-05 16:20 ` [PATCH 04/15] nvme: Inline nvme_ns_has_pi function Max Gurtovoy
2019-11-05 17:50   ` Christoph Hellwig
2019-11-05 16:20 ` [PATCH 05/15] nvme-rdma: Add metadata/T10-PI support Max Gurtovoy
2019-11-05 17:58   ` Christoph Hellwig
2019-11-20 10:41     ` Max Gurtovoy
2019-11-12 18:22   ` Sagi Grimberg
2019-11-13 14:35     ` Max Gurtovoy
2019-11-14 23:57       ` Sagi Grimberg
2019-11-05 16:20 ` [PATCH 06/15] block: Introduce BIP_NOMAP_INTEGRITY bip_flag Max Gurtovoy
2019-11-05 17:52   ` Christoph Hellwig [this message]
2019-11-07  2:43   ` Martin K. Petersen
2019-11-07 13:29     ` Max Gurtovoy
2019-11-09  2:10       ` Martin K. Petersen
2019-11-12 10:40         ` Max Gurtovoy
2019-11-05 16:20 ` [PATCH 07/15] nvmet: Prepare metadata request Max Gurtovoy
2019-11-05 16:20 ` [PATCH 08/15] nvmet: Add metadata characteristics for a namespace Max Gurtovoy
2019-11-05 17:59   ` Christoph Hellwig
2019-11-12 18:38     ` Sagi Grimberg
2019-11-05 16:20 ` [PATCH 09/15] nvmet: Rename nvmet_rw_len to nvmet_rw_data_len Max Gurtovoy
2019-11-05 17:59   ` Christoph Hellwig
2019-11-12 18:39   ` Sagi Grimberg
2019-11-05 16:20 ` [PATCH 10/15] nvmet: Rename nvmet_check_data_len to nvmet_check_transfer_len Max Gurtovoy
2019-11-05 18:00   ` Christoph Hellwig
2019-11-12 18:43   ` Sagi Grimberg
2019-11-05 16:20 ` [PATCH 11/15] nvmet: Introduce nvmet_rw_prot_len and nvmet_ns_has_pi Max Gurtovoy
2019-11-05 18:00   ` Christoph Hellwig
2019-11-05 16:20 ` [PATCH 12/15] nvme: Add Metadata Capabilities enumerations Max Gurtovoy
2019-11-05 16:20 ` [PATCH 13/15] nvmet: Add metadata/T10-PI support Max Gurtovoy
2019-11-05 16:20 ` [PATCH 14/15] nvmet: Add metadata support for block devices Max Gurtovoy
2019-11-05 16:20 ` [PATCH 15/15] nvmet-rdma: Add metadata/T10-PI support Max Gurtovoy
2019-11-05 18:02   ` Christoph Hellwig
2019-11-07 13:43     ` Max Gurtovoy
2019-11-12 18:34   ` Sagi Grimberg
2019-11-13 13:56     ` Max Gurtovoy
2019-11-14 23:45       ` Sagi Grimberg

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