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nvme-fabrics: Add type of service (TOS) configuration
TOS is user-defined and needs to be configured via nvme-cli. It must be set before initiating any traffic and once set the TOS cannot be changed. Signed-off-by: Israel Rukshin <israelr@mellanox.com> Reviewed-by: Max Gurtovoy <maxg@mellanox.com> Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
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2 changed files with 21 additions and 0 deletions
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@ -611,6 +611,7 @@ static const match_table_t opt_tokens = {
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{ NVMF_OPT_DATA_DIGEST, "data_digest" },
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{ NVMF_OPT_NR_WRITE_QUEUES, "nr_write_queues=%d" },
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{ NVMF_OPT_NR_POLL_QUEUES, "nr_poll_queues=%d" },
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{ NVMF_OPT_TOS, "tos=%d" },
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{ NVMF_OPT_ERR, NULL }
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};
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@ -632,6 +633,7 @@ static int nvmf_parse_options(struct nvmf_ctrl_options *opts,
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opts->duplicate_connect = false;
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opts->hdr_digest = false;
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opts->data_digest = false;
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opts->tos = -1; /* < 0 == use transport default */
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options = o = kstrdup(buf, GFP_KERNEL);
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if (!options)
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@ -856,6 +858,22 @@ static int nvmf_parse_options(struct nvmf_ctrl_options *opts,
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}
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opts->nr_poll_queues = token;
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break;
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case NVMF_OPT_TOS:
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if (match_int(args, &token)) {
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ret = -EINVAL;
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goto out;
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}
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if (token < 0) {
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pr_err("Invalid type of service %d\n", token);
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ret = -EINVAL;
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goto out;
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}
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if (token > 255) {
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pr_warn("Clamping type of service to 255\n");
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token = 255;
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}
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opts->tos = token;
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break;
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default:
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pr_warn("unknown parameter or missing value '%s' in ctrl creation request\n",
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p);
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@ -55,6 +55,7 @@ enum {
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NVMF_OPT_DATA_DIGEST = 1 << 16,
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NVMF_OPT_NR_WRITE_QUEUES = 1 << 17,
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NVMF_OPT_NR_POLL_QUEUES = 1 << 18,
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NVMF_OPT_TOS = 1 << 19,
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};
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/**
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@ -87,6 +88,7 @@ enum {
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* @data_digest: generate/verify data digest (TCP)
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* @nr_write_queues: number of queues for write I/O
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* @nr_poll_queues: number of queues for polling I/O
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* @tos: type of service
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*/
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struct nvmf_ctrl_options {
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unsigned mask;
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@ -108,6 +110,7 @@ struct nvmf_ctrl_options {
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bool data_digest;
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unsigned int nr_write_queues;
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unsigned int nr_poll_queues;
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int tos;
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};
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/*
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