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nvmet: refactor configfs transport type handling 

Have a common table of mappings from numerical transport ids to names, and
zero the transport specific area in common code in nvmet_addr_trtype_store.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig 2018-03-20 20:41:34 +01:00 committed by Jens Axboe
parent f871749a9f
commit a5d1861229
1 changed files with 29 additions and 32 deletions
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61
drivers/nvme/target/configfs.c
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@ -23,6 +23,15 @@
static const struct config_item_type nvmet_host_type;
static const struct config_item_type nvmet_subsys_type;
static const struct nvmet_transport_name {
u8 type;
const char *name;
} nvmet_transport_names[] = {
{ NVMF_TRTYPE_RDMA, "rdma" },
{ NVMF_TRTYPE_FC, "fc" },
{ NVMF_TRTYPE_LOOP, "loop" },
};
/*
* nvmet_port Generic ConfigFS definitions.
* Used in any place in the ConfigFS tree that refers to an address.
@ -208,43 +217,30 @@ CONFIGFS_ATTR(nvmet_, addr_trsvcid);
static ssize_t nvmet_addr_trtype_show(struct config_item *item,
char *page)
{
switch (to_nvmet_port(item)->disc_addr.trtype) {
case NVMF_TRTYPE_RDMA:
return sprintf(page, "rdma\n");
case NVMF_TRTYPE_LOOP:
return sprintf(page, "loop\n");
case NVMF_TRTYPE_FC:
return sprintf(page, "fc\n");
default:
return sprintf(page, "\n");
struct nvmet_port *port = to_nvmet_port(item);
int i;
for (i = 0; i < ARRAY_SIZE(nvmet_transport_names); i++) {
if (port->disc_addr.trtype != nvmet_transport_names[i].type)
continue;
return sprintf(page, "%s\n", nvmet_transport_names[i].name);
}
return sprintf(page, "\n");
}
static void nvmet_port_init_tsas_rdma(struct nvmet_port *port)
{
port->disc_addr.trtype = NVMF_TRTYPE_RDMA;
memset(&port->disc_addr.tsas.rdma, 0, NVMF_TSAS_SIZE);
port->disc_addr.tsas.rdma.qptype = NVMF_RDMA_QPTYPE_CONNECTED;
port->disc_addr.tsas.rdma.prtype = NVMF_RDMA_PRTYPE_NOT_SPECIFIED;
port->disc_addr.tsas.rdma.cms = NVMF_RDMA_CMS_RDMA_CM;
}
static void nvmet_port_init_tsas_loop(struct nvmet_port *port)
{
port->disc_addr.trtype = NVMF_TRTYPE_LOOP;
memset(&port->disc_addr.tsas, 0, NVMF_TSAS_SIZE);
}
static void nvmet_port_init_tsas_fc(struct nvmet_port *port)
{
port->disc_addr.trtype = NVMF_TRTYPE_FC;
memset(&port->disc_addr.tsas, 0, NVMF_TSAS_SIZE);
}
static ssize_t nvmet_addr_trtype_store(struct config_item *item,
const char *page, size_t count)
{
struct nvmet_port *port = to_nvmet_port(item);
int i;
if (port->enabled) {
pr_err("Cannot modify address while enabled\n");
@ -252,17 +248,18 @@ static ssize_t nvmet_addr_trtype_store(struct config_item *item,
return -EACCES;
}
if (sysfs_streq(page, "rdma")) {
nvmet_port_init_tsas_rdma(port);
} else if (sysfs_streq(page, "loop")) {
nvmet_port_init_tsas_loop(port);
} else if (sysfs_streq(page, "fc")) {
nvmet_port_init_tsas_fc(port);
} else {
pr_err("Invalid value '%s' for trtype\n", page);
return -EINVAL;
for (i = 0; i < ARRAY_SIZE(nvmet_transport_names); i++) {
if (sysfs_streq(page, nvmet_transport_names[i].name))
goto found;
}
pr_err("Invalid value '%s' for trtype\n", page);
return -EINVAL;
found:
memset(&port->disc_addr.tsas, 0, NVMF_TSAS_SIZE);
port->disc_addr.trtype = nvmet_transport_names[i].type;
if (port->disc_addr.trtype == NVMF_TRTYPE_RDMA)
nvmet_port_init_tsas_rdma(port);
return count;
}