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nvme-fabrics: Add type of service (TOS) configuration

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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>
This commit is contained in:
Israel Rukshin 2019-08-18 12:08:51 +03:00 committed by Sagi Grimberg
parent 35d1a938dc
commit 52b4451a9e
2 changed files with 21 additions and 0 deletions
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18
drivers/nvme/host/fabrics.c
View File

@ -611,6 +611,7 @@ static const match_table_t opt_tokens = {
{ NVMF_OPT_DATA_DIGEST, "data_digest" },
{ NVMF_OPT_NR_WRITE_QUEUES, "nr_write_queues=%d" },
{ NVMF_OPT_NR_POLL_QUEUES, "nr_poll_queues=%d" },
{ NVMF_OPT_TOS, "tos=%d" },
{ NVMF_OPT_ERR, NULL }
};
@ -632,6 +633,7 @@ static int nvmf_parse_options(struct nvmf_ctrl_options *opts,
opts->duplicate_connect = false;
opts->hdr_digest = false;
opts->data_digest = false;
opts->tos = -1; /* < 0 == use transport default */
options = o = kstrdup(buf, GFP_KERNEL);
if (!options)
@ -856,6 +858,22 @@ static int nvmf_parse_options(struct nvmf_ctrl_options *opts,
}
opts->nr_poll_queues = token;
break;
case NVMF_OPT_TOS:
if (match_int(args, &token)) {
ret = -EINVAL;
goto out;
}
if (token < 0) {
pr_err("Invalid type of service %d\n", token);
ret = -EINVAL;
goto out;
}
if (token > 255) {
pr_warn("Clamping type of service to 255\n");
token = 255;
}
opts->tos = token;
break;
default:
pr_warn("unknown parameter or missing value '%s' in ctrl creation request\n",
p);

3
drivers/nvme/host/fabrics.h
View File

@ -55,6 +55,7 @@ enum {
NVMF_OPT_DATA_DIGEST = 1 << 16,
NVMF_OPT_NR_WRITE_QUEUES = 1 << 17,
NVMF_OPT_NR_POLL_QUEUES = 1 << 18,
NVMF_OPT_TOS = 1 << 19,
};
/**
@ -87,6 +88,7 @@ enum {
* @data_digest: generate/verify data digest (TCP)
* @nr_write_queues: number of queues for write I/O
* @nr_poll_queues: number of queues for polling I/O
* @tos: type of service
*/
struct nvmf_ctrl_options {
unsigned mask;
@ -108,6 +110,7 @@ struct nvmf_ctrl_options {
bool data_digest;
unsigned int nr_write_queues;
unsigned int nr_poll_queues;
int tos;
};
/*