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lib/nvme: add functions for registering new transports

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Signed-off-by: Seth Howell <seth.howell@intel.com>
Change-Id: I7f04968957fbc80ca8ed3ddd96e13bb9cb855813
Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/478866
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
This commit is contained in:
Seth Howell 2019-12-26 09:31:09 -07:00 committed by Tomasz Zawadzki
parent 017a8f885f
commit b2e55c2454
2 changed files with 47 additions and 0 deletions
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19
include/spdk/nvme.h
View File

@ -2895,6 +2895,25 @@ struct spdk_nvme_transport_ops {
void (*admin_qpair_abort_aers)(struct spdk_nvme_qpair *qpair); void (*admin_qpair_abort_aers)(struct spdk_nvme_qpair *qpair);
}; };
/**
* Register the operations for a given transport type.
*
* This function should be invoked by referencing the macro
* SPDK_NVME_TRANSPORT_REGISTER macro in the transport's .c file.
*
* \param ops The operations associated with an NVMe-oF transport.
*/
void spdk_nvme_transport_register(const struct spdk_nvme_transport_ops *ops);
/*
* Macro used to register new transports.
*/
#define SPDK_NVME_TRANSPORT_REGISTER(name, transport_ops) \
static void __attribute__((constructor)) spdk_nvme_transport_register_##name(void) \
{ \
spdk_nvme_transport_register(transport_ops); \
}\
#ifdef __cplusplus #ifdef __cplusplus
} }
#endif #endif

28
lib/nvme/nvme_transport.c
View File

@ -36,6 +36,7 @@
*/ */
#include "nvme_internal.h" #include "nvme_internal.h"
#include "spdk/queue.h"
#ifdef DEBUG #ifdef DEBUG
static __attribute__((noreturn)) void static __attribute__((noreturn)) void
@ -76,6 +77,9 @@ nvme_transport_unknown(enum spdk_nvme_transport_type trtype)
SPDK_UNREACHABLE(); \ SPDK_UNREACHABLE(); \
} while (0) } while (0)
TAILQ_HEAD(nvme_transport_list, nvme_transport) g_spdk_nvme_transports =
TAILQ_HEAD_INITIALIZER(g_spdk_nvme_transports);
bool bool
spdk_nvme_transport_available(enum spdk_nvme_transport_type trtype) spdk_nvme_transport_available(enum spdk_nvme_transport_type trtype)
{ {
@ -105,6 +109,30 @@ spdk_nvme_transport_available_by_name(const char *transport_name)
return spdk_nvme_transport_available(trtype); return spdk_nvme_transport_available(trtype);
} }
void
spdk_nvme_transport_register(const struct spdk_nvme_transport_ops *ops)
{
struct nvme_transport *registered_transport, *new_transport;
TAILQ_FOREACH(registered_transport, &g_spdk_nvme_transports, link) {
if (strcasecmp(ops->name, registered_transport->ops.name) == 0) {
SPDK_ERRLOG("Double registering NVMe transport %s is prohibited.\n", ops->name);
assert(false);
return;
}
}
new_transport = calloc(1, sizeof(*new_transport));
if (new_transport == NULL) {
SPDK_ERRLOG("Unable to allocate memory to register new NVMe transport.\n");
assert(false);
return;
}
new_transport->ops = *ops;
TAILQ_INSERT_TAIL(&g_spdk_nvme_transports, new_transport, link);
}
struct spdk_nvme_ctrlr *nvme_transport_ctrlr_construct(const struct spdk_nvme_transport_id *trid, struct spdk_nvme_ctrlr *nvme_transport_ctrlr_construct(const struct spdk_nvme_transport_id *trid,
const struct spdk_nvme_ctrlr_opts *opts, const struct spdk_nvme_ctrlr_opts *opts,
void *devhandle) void *devhandle)