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nvme-fabrics: allow user to set nr_write_queues for separate queue maps

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This argument will specify how many I/O queues will be connected in
create_ctrl in addition to nr_io_queues. With this configuration, I/O
that carries payload from the host to the target, will use the default
hctx queue map, and I/O that involves target to host transfers will use
the read hctx queue map.

Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Sagi Grimberg 2018-12-11 23:38:56 -08:00 committed by Christoph Hellwig
parent fa9a1811e0
commit 330f6b8a70
2 changed files with 16 additions and 0 deletions
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13
drivers/nvme/host/fabrics.c
View file

@ -616,6 +616,7 @@ static const match_table_t opt_tokens = {
{ NVMF_OPT_DISABLE_SQFLOW, "disable_sqflow" },
{ NVMF_OPT_HDR_DIGEST, "hdr_digest" },
{ NVMF_OPT_DATA_DIGEST, "data_digest" },
{ NVMF_OPT_NR_WRITE_QUEUES, "nr_write_queues=%d" },
{ NVMF_OPT_ERR, NULL }
};
@ -837,6 +838,18 @@ static int nvmf_parse_options(struct nvmf_ctrl_options *opts,
case NVMF_OPT_DATA_DIGEST:
opts->data_digest = true;
break;
case NVMF_OPT_NR_WRITE_QUEUES:
if (match_int(args, &token)) {
ret = -EINVAL;
goto out;
}
if (token <= 0) {
pr_err("Invalid nr_write_queues %d\n", token);
ret = -EINVAL;
goto out;
}
opts->nr_write_queues = 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

@ -61,6 +61,7 @@ enum {
NVMF_OPT_DISABLE_SQFLOW = 1 << 14,
NVMF_OPT_HDR_DIGEST = 1 << 15,
NVMF_OPT_DATA_DIGEST = 1 << 16,
NVMF_OPT_NR_WRITE_QUEUES = 1 << 17,
};
/**
@ -91,6 +92,7 @@ enum {
* @disable_sqflow: disable controller sq flow control
* @hdr_digest: generate/verify header digest (TCP)
* @data_digest: generate/verify data digest (TCP)
* @nr_write_queues: number of queues for write I/O
*/
struct nvmf_ctrl_options {
unsigned mask;
@ -110,6 +112,7 @@ struct nvmf_ctrl_options {
bool disable_sqflow;
bool hdr_digest;
bool data_digest;
unsigned int nr_write_queues;
};
/*