[PATCH v4 09/13] nvme-fabrics: allow user passing data digest

[Sagi Grimberg]

From: Sagi Grimberg <s...@lightbitslabs.com>

Data digest is a nvme-tcp specific feature, but nothing prevents other
transports reusing the concept so do not associate with tcp transport
solely.

Reviewed-by: Christoph Hellwig <h...@lst.de>
Signed-off-by: Sagi Grimberg <s...@lightbitslabs.com>
---
 drivers/nvme/host/fabrics.c | 5 +++++
 drivers/nvme/host/fabrics.h | 2 ++
 2 files changed, 7 insertions(+)

diff --git a/drivers/nvme/host/fabrics.c b/drivers/nvme/host/fabrics.c
index 4272f8a95db3..9c62c6838b76 100644
--- a/drivers/nvme/host/fabrics.c
+++ b/drivers/nvme/host/fabrics.c
@@ -615,6 +615,7 @@ static const match_table_t opt_tokens = {
        { NVMF_OPT_DUP_CONNECT,         "duplicate_connect"     },
        { NVMF_OPT_DISABLE_SQFLOW,      "disable_sqflow"        },
        { NVMF_OPT_HDR_DIGEST,          "hdr_digest"            },
+       { NVMF_OPT_DATA_DIGEST,         "data_digest"           },
        { NVMF_OPT_ERR,                 NULL                    }
 };
 
@@ -635,6 +636,7 @@ static int nvmf_parse_options(struct nvmf_ctrl_options 
*opts,
        opts->kato = NVME_DEFAULT_KATO;
        opts->duplicate_connect = false;
        opts->hdr_digest = false;
+       opts->data_digest = false;
 
        options = o = kstrdup(buf, GFP_KERNEL);
        if (!options)
@@ -832,6 +834,9 @@ static int nvmf_parse_options(struct nvmf_ctrl_options 
*opts,
                case NVMF_OPT_HDR_DIGEST:
                        opts->hdr_digest = true;
                        break;
+               case NVMF_OPT_DATA_DIGEST:
+                       opts->data_digest = true;
+                       break;
                default:
                        pr_warn("unknown parameter or missing value '%s' in 
ctrl creation request\n",
                                p);
diff --git a/drivers/nvme/host/fabrics.h b/drivers/nvme/host/fabrics.h
index a6127f1a9e8e..524a02a67817 100644
--- a/drivers/nvme/host/fabrics.h
+++ b/drivers/nvme/host/fabrics.h
@@ -60,6 +60,7 @@ enum {
        NVMF_OPT_DUP_CONNECT    = 1 << 13,
        NVMF_OPT_DISABLE_SQFLOW = 1 << 14,
        NVMF_OPT_HDR_DIGEST     = 1 << 15,
+       NVMF_OPT_DATA_DIGEST    = 1 << 16,
 };
 
 /**
@@ -105,6 +106,7 @@ struct nvmf_ctrl_options {
        int                     max_reconnects;
        bool                    disable_sqflow;
        bool                    hdr_digest;
+       bool                    data_digest;
 };
 
 /*
-- 
2.17.1