diff options
Diffstat (limited to 'src/spdk/lib/nvmf/nvmf.c')
| -rw-r--r-- | src/spdk/lib/nvmf/nvmf.c | 1173 |
1 files changed, 1173 insertions, 0 deletions
diff --git a/src/spdk/lib/nvmf/nvmf.c b/src/spdk/lib/nvmf/nvmf.c new file mode 100644 index 00000000..32539f53 --- /dev/null +++ b/src/spdk/lib/nvmf/nvmf.c @@ -0,0 +1,1173 @@ +/*- + * BSD LICENSE + * + * Copyright (c) Intel Corporation. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Intel Corporation nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include "spdk/stdinc.h" + +#include "spdk/bdev.h" +#include "spdk/bit_array.h" +#include "spdk/conf.h" +#include "spdk/thread.h" +#include "spdk/nvmf.h" +#include "spdk/trace.h" +#include "spdk/endian.h" +#include "spdk/string.h" + +#include "spdk_internal/log.h" + +#include "nvmf_internal.h" +#include "transport.h" + +SPDK_LOG_REGISTER_COMPONENT("nvmf", SPDK_LOG_NVMF) + +#define SPDK_NVMF_DEFAULT_MAX_QUEUE_DEPTH 128 +#define SPDK_NVMF_DEFAULT_MAX_QPAIRS_PER_CTRLR 64 +#define SPDK_NVMF_DEFAULT_IN_CAPSULE_DATA_SIZE 4096 +#define SPDK_NVMF_DEFAULT_MAX_IO_SIZE 131072 +#define SPDK_NVMF_DEFAULT_MAX_SUBSYSTEMS 1024 +#define SPDK_NVMF_DEFAULT_IO_UNIT_SIZE 131072 + +typedef void (*nvmf_qpair_disconnect_cpl)(void *ctx, int status); +static void spdk_nvmf_tgt_destroy_poll_group(void *io_device, void *ctx_buf); + +/* supplied to a single call to nvmf_qpair_disconnect */ +struct nvmf_qpair_disconnect_ctx { + struct spdk_nvmf_qpair *qpair; + struct spdk_nvmf_ctrlr *ctrlr; + nvmf_qpair_disconnect_cb cb_fn; + struct spdk_thread *thread; + void *ctx; + uint16_t qid; +}; + +/* + * There are several times when we need to iterate through the list of all qpairs and selectively delete them. + * In order to do this sequentially without overlap, we must provide a context to recover the next qpair from + * to enable calling nvmf_qpair_disconnect on the next desired qpair. + */ +struct nvmf_qpair_disconnect_many_ctx { + struct spdk_nvmf_subsystem *subsystem; + struct spdk_nvmf_poll_group *group; + spdk_nvmf_poll_group_mod_done cpl_fn; + void *cpl_ctx; +}; + +static void +spdk_nvmf_qpair_set_state(struct spdk_nvmf_qpair *qpair, + enum spdk_nvmf_qpair_state state) +{ + assert(qpair != NULL); + assert(qpair->group->thread == spdk_get_thread()); + + qpair->state = state; +} + +void +spdk_nvmf_tgt_opts_init(struct spdk_nvmf_tgt_opts *opts) +{ + opts->max_queue_depth = SPDK_NVMF_DEFAULT_MAX_QUEUE_DEPTH; + opts->max_qpairs_per_ctrlr = SPDK_NVMF_DEFAULT_MAX_QPAIRS_PER_CTRLR; + opts->in_capsule_data_size = SPDK_NVMF_DEFAULT_IN_CAPSULE_DATA_SIZE; + opts->max_io_size = SPDK_NVMF_DEFAULT_MAX_IO_SIZE; + opts->max_subsystems = SPDK_NVMF_DEFAULT_MAX_SUBSYSTEMS; + opts->io_unit_size = SPDK_NVMF_DEFAULT_IO_UNIT_SIZE; +} + +static int +spdk_nvmf_poll_group_poll(void *ctx) +{ + struct spdk_nvmf_poll_group *group = ctx; + int rc; + int count = 0; + struct spdk_nvmf_transport_poll_group *tgroup; + + TAILQ_FOREACH(tgroup, &group->tgroups, link) { + rc = spdk_nvmf_transport_poll_group_poll(tgroup); + if (rc < 0) { + return -1; + } + count += rc; + } + + return count; +} + +static int +spdk_nvmf_tgt_create_poll_group(void *io_device, void *ctx_buf) +{ + struct spdk_nvmf_tgt *tgt = io_device; + struct spdk_nvmf_poll_group *group = ctx_buf; + struct spdk_nvmf_transport *transport; + uint32_t sid; + + TAILQ_INIT(&group->tgroups); + TAILQ_INIT(&group->qpairs); + + TAILQ_FOREACH(transport, &tgt->transports, link) { + spdk_nvmf_poll_group_add_transport(group, transport); + } + + group->num_sgroups = tgt->opts.max_subsystems; + group->sgroups = calloc(tgt->opts.max_subsystems, sizeof(struct spdk_nvmf_subsystem_poll_group)); + if (!group->sgroups) { + return -1; + } + + for (sid = 0; sid < tgt->opts.max_subsystems; sid++) { + struct spdk_nvmf_subsystem *subsystem; + + subsystem = tgt->subsystems[sid]; + if (!subsystem) { + continue; + } + + if (spdk_nvmf_poll_group_add_subsystem(group, subsystem, NULL, NULL) != 0) { + spdk_nvmf_tgt_destroy_poll_group(io_device, ctx_buf); + return -1; + } + } + + group->poller = spdk_poller_register(spdk_nvmf_poll_group_poll, group, 0); + group->thread = spdk_get_thread(); + + return 0; +} + +static void +spdk_nvmf_tgt_destroy_poll_group(void *io_device, void *ctx_buf) +{ + struct spdk_nvmf_poll_group *group = ctx_buf; + struct spdk_nvmf_transport_poll_group *tgroup, *tmp; + struct spdk_nvmf_subsystem_poll_group *sgroup; + uint32_t sid, nsid; + + TAILQ_FOREACH_SAFE(tgroup, &group->tgroups, link, tmp) { + TAILQ_REMOVE(&group->tgroups, tgroup, link); + spdk_nvmf_transport_poll_group_destroy(tgroup); + } + + for (sid = 0; sid < group->num_sgroups; sid++) { + sgroup = &group->sgroups[sid]; + + for (nsid = 0; nsid < sgroup->num_channels; nsid++) { + if (sgroup->channels[nsid]) { + spdk_put_io_channel(sgroup->channels[nsid]); + sgroup->channels[nsid] = NULL; + } + } + + free(sgroup->channels); + } + + free(group->sgroups); +} + +static void +_nvmf_tgt_disconnect_next_qpair(void *ctx) +{ + struct spdk_nvmf_qpair *qpair; + struct nvmf_qpair_disconnect_many_ctx *qpair_ctx = ctx; + struct spdk_nvmf_poll_group *group = qpair_ctx->group; + struct spdk_io_channel *ch; + int rc = 0; + + qpair = TAILQ_FIRST(&group->qpairs); + + if (qpair) { + rc = spdk_nvmf_qpair_disconnect(qpair, _nvmf_tgt_disconnect_next_qpair, ctx); + } + + if (!qpair || rc != 0) { + /* When the refcount from the channels reaches 0, spdk_nvmf_tgt_destroy_poll_group will be called. */ + ch = spdk_io_channel_from_ctx(group); + spdk_put_io_channel(ch); + free(qpair_ctx); + } +} + +static void +spdk_nvmf_tgt_destroy_poll_group_qpairs(struct spdk_nvmf_poll_group *group) +{ + struct nvmf_qpair_disconnect_many_ctx *ctx; + + ctx = calloc(1, sizeof(struct nvmf_qpair_disconnect_many_ctx)); + + if (!ctx) { + SPDK_ERRLOG("Failed to allocate memory for destroy poll group ctx\n"); + return; + } + + spdk_poller_unregister(&group->poller); + + ctx->group = group; + _nvmf_tgt_disconnect_next_qpair(ctx); +} + +struct spdk_nvmf_tgt * +spdk_nvmf_tgt_create(struct spdk_nvmf_tgt_opts *opts) +{ + struct spdk_nvmf_tgt *tgt; + + tgt = calloc(1, sizeof(*tgt)); + if (!tgt) { + return NULL; + } + + if (!opts) { + spdk_nvmf_tgt_opts_init(&tgt->opts); + } else { + tgt->opts = *opts; + } + + tgt->discovery_genctr = 0; + tgt->discovery_log_page = NULL; + tgt->discovery_log_page_size = 0; + TAILQ_INIT(&tgt->transports); + + tgt->subsystems = calloc(tgt->opts.max_subsystems, sizeof(struct spdk_nvmf_subsystem *)); + if (!tgt->subsystems) { + free(tgt); + return NULL; + } + + spdk_io_device_register(tgt, + spdk_nvmf_tgt_create_poll_group, + spdk_nvmf_tgt_destroy_poll_group, + sizeof(struct spdk_nvmf_poll_group), + "nvmf_tgt"); + + return tgt; +} + +static void +spdk_nvmf_tgt_destroy_cb(void *io_device) +{ + struct spdk_nvmf_tgt *tgt = io_device; + struct spdk_nvmf_transport *transport, *transport_tmp; + spdk_nvmf_tgt_destroy_done_fn *destroy_cb_fn; + void *destroy_cb_arg; + uint32_t i; + + if (tgt->discovery_log_page) { + free(tgt->discovery_log_page); + } + + if (tgt->subsystems) { + for (i = 0; i < tgt->opts.max_subsystems; i++) { + if (tgt->subsystems[i]) { + spdk_nvmf_subsystem_destroy(tgt->subsystems[i]); + } + } + free(tgt->subsystems); + } + + TAILQ_FOREACH_SAFE(transport, &tgt->transports, link, transport_tmp) { + TAILQ_REMOVE(&tgt->transports, transport, link); + spdk_nvmf_transport_destroy(transport); + } + + destroy_cb_fn = tgt->destroy_cb_fn; + destroy_cb_arg = tgt->destroy_cb_arg; + + free(tgt); + + if (destroy_cb_fn) { + destroy_cb_fn(destroy_cb_arg, 0); + } +} + +void +spdk_nvmf_tgt_destroy(struct spdk_nvmf_tgt *tgt, + spdk_nvmf_tgt_destroy_done_fn cb_fn, + void *cb_arg) +{ + tgt->destroy_cb_fn = cb_fn; + tgt->destroy_cb_arg = cb_arg; + + spdk_io_device_unregister(tgt, spdk_nvmf_tgt_destroy_cb); +} + +static void +spdk_nvmf_write_subsystem_config_json(struct spdk_json_write_ctx *w, + struct spdk_nvmf_subsystem *subsystem) +{ + struct spdk_nvmf_host *host; + struct spdk_nvmf_listener *listener; + const struct spdk_nvme_transport_id *trid; + struct spdk_nvmf_ns *ns; + struct spdk_nvmf_ns_opts ns_opts; + uint32_t max_namespaces; + char uuid_str[SPDK_UUID_STRING_LEN]; + const char *trtype; + const char *adrfam; + + if (spdk_nvmf_subsystem_get_type(subsystem) != SPDK_NVMF_SUBTYPE_NVME) { + return; + } + + /* { */ + spdk_json_write_object_begin(w); + spdk_json_write_named_string(w, "method", "nvmf_subsystem_create"); + + /* "params" : { */ + spdk_json_write_named_object_begin(w, "params"); + spdk_json_write_named_string(w, "nqn", spdk_nvmf_subsystem_get_nqn(subsystem)); + spdk_json_write_named_bool(w, "allow_any_host", spdk_nvmf_subsystem_get_allow_any_host(subsystem)); + spdk_json_write_named_string(w, "serial_number", spdk_nvmf_subsystem_get_sn(subsystem)); + + max_namespaces = spdk_nvmf_subsystem_get_max_namespaces(subsystem); + if (max_namespaces != 0) { + spdk_json_write_named_uint32(w, "max_namespaces", max_namespaces); + } + + /* } "params" */ + spdk_json_write_object_end(w); + + /* } */ + spdk_json_write_object_end(w); + + for (listener = spdk_nvmf_subsystem_get_first_listener(subsystem); listener != NULL; + listener = spdk_nvmf_subsystem_get_next_listener(subsystem, listener)) { + trid = spdk_nvmf_listener_get_trid(listener); + + trtype = spdk_nvme_transport_id_trtype_str(trid->trtype); + adrfam = spdk_nvme_transport_id_adrfam_str(trid->adrfam); + + spdk_json_write_object_begin(w); + spdk_json_write_named_string(w, "method", "nvmf_subsystem_add_listener"); + + /* "params" : { */ + spdk_json_write_named_object_begin(w, "params"); + + spdk_json_write_named_string(w, "nqn", spdk_nvmf_subsystem_get_nqn(subsystem)); + + /* "listen_address" : { */ + spdk_json_write_named_object_begin(w, "listen_address"); + + spdk_json_write_named_string(w, "trtype", trtype); + if (adrfam) { + spdk_json_write_named_string(w, "adrfam", adrfam); + } + + spdk_json_write_named_string(w, "traddr", trid->traddr); + spdk_json_write_named_string(w, "trsvcid", trid->trsvcid); + /* } "listen_address" */ + spdk_json_write_object_end(w); + + /* } "params" */ + spdk_json_write_object_end(w); + + /* } */ + spdk_json_write_object_end(w); + } + + for (host = spdk_nvmf_subsystem_get_first_host(subsystem); host != NULL; + host = spdk_nvmf_subsystem_get_next_host(subsystem, host)) { + + spdk_json_write_object_begin(w); + spdk_json_write_named_string(w, "method", "nvmf_subsystem_add_host"); + + /* "params" : { */ + spdk_json_write_named_object_begin(w, "params"); + + spdk_json_write_named_string(w, "nqn", spdk_nvmf_subsystem_get_nqn(subsystem)); + spdk_json_write_named_string(w, "host", spdk_nvmf_host_get_nqn(host)); + + /* } "params" */ + spdk_json_write_object_end(w); + + /* } */ + spdk_json_write_object_end(w); + } + + for (ns = spdk_nvmf_subsystem_get_first_ns(subsystem); ns != NULL; + ns = spdk_nvmf_subsystem_get_next_ns(subsystem, ns)) { + spdk_nvmf_ns_get_opts(ns, &ns_opts, sizeof(ns_opts)); + + spdk_json_write_object_begin(w); + spdk_json_write_named_string(w, "method", "nvmf_subsystem_add_ns"); + + /* "params" : { */ + spdk_json_write_named_object_begin(w, "params"); + + spdk_json_write_named_string(w, "nqn", spdk_nvmf_subsystem_get_nqn(subsystem)); + + /* "namespace" : { */ + spdk_json_write_named_object_begin(w, "namespace"); + + spdk_json_write_named_uint32(w, "nsid", spdk_nvmf_ns_get_id(ns)); + spdk_json_write_named_string(w, "bdev_name", spdk_bdev_get_name(spdk_nvmf_ns_get_bdev(ns))); + + if (!spdk_mem_all_zero(ns_opts.nguid, sizeof(ns_opts.nguid))) { + SPDK_STATIC_ASSERT(sizeof(ns_opts.nguid) == sizeof(uint64_t) * 2, "size mismatch"); + spdk_json_write_named_string_fmt(w, "nguid", "%016"PRIX64"%016"PRIX64, from_be64(&ns_opts.nguid[0]), + from_be64(&ns_opts.nguid[8])); + } + + if (!spdk_mem_all_zero(ns_opts.eui64, sizeof(ns_opts.eui64))) { + SPDK_STATIC_ASSERT(sizeof(ns_opts.eui64) == sizeof(uint64_t), "size mismatch"); + spdk_json_write_named_string_fmt(w, "eui64", "%016"PRIX64, from_be64(&ns_opts.eui64)); + } + + if (!spdk_mem_all_zero(&ns_opts.uuid, sizeof(ns_opts.uuid))) { + spdk_uuid_fmt_lower(uuid_str, sizeof(uuid_str), &ns_opts.uuid); + spdk_json_write_named_string(w, "uuid", uuid_str); + } + + /* "namespace" */ + spdk_json_write_object_end(w); + + /* } "params" */ + spdk_json_write_object_end(w); + + /* } */ + spdk_json_write_object_end(w); + } +} + +void +spdk_nvmf_tgt_write_config_json(struct spdk_json_write_ctx *w, struct spdk_nvmf_tgt *tgt) +{ + struct spdk_nvmf_subsystem *subsystem; + struct spdk_nvmf_transport *transport; + + spdk_json_write_object_begin(w); + spdk_json_write_named_string(w, "method", "set_nvmf_target_options"); + + spdk_json_write_named_object_begin(w, "params"); + spdk_json_write_named_uint32(w, "max_queue_depth", tgt->opts.max_queue_depth); + spdk_json_write_named_uint32(w, "max_qpairs_per_ctrlr", tgt->opts.max_qpairs_per_ctrlr); + spdk_json_write_named_uint32(w, "in_capsule_data_size", tgt->opts.in_capsule_data_size); + spdk_json_write_named_uint32(w, "max_io_size", tgt->opts.max_io_size); + spdk_json_write_named_uint32(w, "max_subsystems", tgt->opts.max_subsystems); + spdk_json_write_named_uint32(w, "io_unit_size", tgt->opts.io_unit_size); + spdk_json_write_object_end(w); + + spdk_json_write_object_end(w); + + /* write transports */ + TAILQ_FOREACH(transport, &tgt->transports, link) { + spdk_json_write_object_begin(w); + spdk_json_write_named_string(w, "method", "nvmf_create_transport"); + + spdk_json_write_named_object_begin(w, "params"); + spdk_json_write_named_string(w, "trtype", spdk_nvme_transport_id_trtype_str(transport->ops->type)); + spdk_json_write_named_uint32(w, "max_queue_depth", transport->opts.max_queue_depth); + spdk_json_write_named_uint32(w, "max_qpairs_per_ctrlr", transport->opts.max_qpairs_per_ctrlr); + spdk_json_write_named_uint32(w, "in_capsule_data_size", transport->opts.in_capsule_data_size); + spdk_json_write_named_uint32(w, "max_io_size", transport->opts.max_io_size); + spdk_json_write_named_uint32(w, "io_unit_size", transport->opts.io_unit_size); + spdk_json_write_named_uint32(w, "max_aq_depth", transport->opts.max_aq_depth); + spdk_json_write_object_end(w); + + spdk_json_write_object_end(w); + } + + subsystem = spdk_nvmf_subsystem_get_first(tgt); + while (subsystem) { + spdk_nvmf_write_subsystem_config_json(w, subsystem); + subsystem = spdk_nvmf_subsystem_get_next(subsystem); + } +} + +void +spdk_nvmf_tgt_listen(struct spdk_nvmf_tgt *tgt, + struct spdk_nvme_transport_id *trid, + spdk_nvmf_tgt_listen_done_fn cb_fn, + void *cb_arg) +{ + struct spdk_nvmf_transport *transport; + int rc; + bool propagate = false; + + transport = spdk_nvmf_tgt_get_transport(tgt, trid->trtype); + if (!transport) { + struct spdk_nvmf_transport_opts opts; + + opts.max_queue_depth = tgt->opts.max_queue_depth; + opts.max_qpairs_per_ctrlr = tgt->opts.max_qpairs_per_ctrlr; + opts.in_capsule_data_size = tgt->opts.in_capsule_data_size; + opts.max_io_size = tgt->opts.max_io_size; + opts.io_unit_size = tgt->opts.io_unit_size; + /* use max_queue depth since tgt. opts. doesn't have max_aq_depth */ + opts.max_aq_depth = tgt->opts.max_queue_depth; + + transport = spdk_nvmf_transport_create(trid->trtype, &opts); + if (!transport) { + SPDK_ERRLOG("Transport initialization failed\n"); + cb_fn(cb_arg, -EINVAL); + return; + } + + propagate = true; + } + + rc = spdk_nvmf_transport_listen(transport, trid); + if (rc < 0) { + SPDK_ERRLOG("Unable to listen on address '%s'\n", trid->traddr); + cb_fn(cb_arg, rc); + return; + } + + tgt->discovery_genctr++; + + if (propagate) { + spdk_nvmf_tgt_add_transport(tgt, transport, cb_fn, cb_arg); + } else { + cb_fn(cb_arg, 0); + } +} + +struct spdk_nvmf_tgt_add_transport_ctx { + struct spdk_nvmf_tgt *tgt; + struct spdk_nvmf_transport *transport; + spdk_nvmf_tgt_add_transport_done_fn cb_fn; + void *cb_arg; +}; + +static void +_spdk_nvmf_tgt_add_transport_done(struct spdk_io_channel_iter *i, int status) +{ + struct spdk_nvmf_tgt_add_transport_ctx *ctx = spdk_io_channel_iter_get_ctx(i); + + ctx->cb_fn(ctx->cb_arg, status); + + free(ctx); +} + +static void +_spdk_nvmf_tgt_add_transport(struct spdk_io_channel_iter *i) +{ + struct spdk_nvmf_tgt_add_transport_ctx *ctx = spdk_io_channel_iter_get_ctx(i); + struct spdk_io_channel *ch = spdk_io_channel_iter_get_channel(i); + struct spdk_nvmf_poll_group *group = spdk_io_channel_get_ctx(ch); + int rc; + + rc = spdk_nvmf_poll_group_add_transport(group, ctx->transport); + spdk_for_each_channel_continue(i, rc); +} + +void spdk_nvmf_tgt_add_transport(struct spdk_nvmf_tgt *tgt, + struct spdk_nvmf_transport *transport, + spdk_nvmf_tgt_add_transport_done_fn cb_fn, + void *cb_arg) +{ + struct spdk_nvmf_tgt_add_transport_ctx *ctx; + + if (spdk_nvmf_tgt_get_transport(tgt, transport->ops->type)) { + cb_fn(cb_arg, -EEXIST); + return; /* transport already created */ + } + + transport->tgt = tgt; + TAILQ_INSERT_TAIL(&tgt->transports, transport, link); + + ctx = calloc(1, sizeof(*ctx)); + if (!ctx) { + cb_fn(cb_arg, -ENOMEM); + return; + } + + ctx->tgt = tgt; + ctx->transport = transport; + ctx->cb_fn = cb_fn; + ctx->cb_arg = cb_arg; + + spdk_for_each_channel(tgt, + _spdk_nvmf_tgt_add_transport, + ctx, + _spdk_nvmf_tgt_add_transport_done); +} + +struct spdk_nvmf_subsystem * +spdk_nvmf_tgt_find_subsystem(struct spdk_nvmf_tgt *tgt, const char *subnqn) +{ + struct spdk_nvmf_subsystem *subsystem; + uint32_t sid; + + if (!subnqn) { + return NULL; + } + + for (sid = 0; sid < tgt->opts.max_subsystems; sid++) { + subsystem = tgt->subsystems[sid]; + if (subsystem == NULL) { + continue; + } + + if (strcmp(subnqn, subsystem->subnqn) == 0) { + return subsystem; + } + } + + return NULL; +} + +struct spdk_nvmf_transport * +spdk_nvmf_tgt_get_transport(struct spdk_nvmf_tgt *tgt, enum spdk_nvme_transport_type type) +{ + struct spdk_nvmf_transport *transport; + + TAILQ_FOREACH(transport, &tgt->transports, link) { + if (transport->ops->type == type) { + return transport; + } + } + + return NULL; +} + +void +spdk_nvmf_tgt_accept(struct spdk_nvmf_tgt *tgt, new_qpair_fn cb_fn) +{ + struct spdk_nvmf_transport *transport, *tmp; + + TAILQ_FOREACH_SAFE(transport, &tgt->transports, link, tmp) { + spdk_nvmf_transport_accept(transport, cb_fn); + } +} + +struct spdk_nvmf_poll_group * +spdk_nvmf_poll_group_create(struct spdk_nvmf_tgt *tgt) +{ + struct spdk_io_channel *ch; + + ch = spdk_get_io_channel(tgt); + if (!ch) { + SPDK_ERRLOG("Unable to get I/O channel for target\n"); + return NULL; + } + + return spdk_io_channel_get_ctx(ch); +} + +void +spdk_nvmf_poll_group_destroy(struct spdk_nvmf_poll_group *group) +{ + /* This function will put the io_channel associated with this poll group */ + spdk_nvmf_tgt_destroy_poll_group_qpairs(group); +} + +int +spdk_nvmf_poll_group_add(struct spdk_nvmf_poll_group *group, + struct spdk_nvmf_qpair *qpair) +{ + int rc = -1; + struct spdk_nvmf_transport_poll_group *tgroup; + + TAILQ_INIT(&qpair->outstanding); + qpair->group = group; + spdk_nvmf_qpair_set_state(qpair, SPDK_NVMF_QPAIR_ACTIVATING); + + TAILQ_INSERT_TAIL(&group->qpairs, qpair, link); + + TAILQ_FOREACH(tgroup, &group->tgroups, link) { + if (tgroup->transport == qpair->transport) { + rc = spdk_nvmf_transport_poll_group_add(tgroup, qpair); + break; + } + } + + if (rc == 0) { + spdk_nvmf_qpair_set_state(qpair, SPDK_NVMF_QPAIR_ACTIVE); + } else { + spdk_nvmf_qpair_set_state(qpair, SPDK_NVMF_QPAIR_INACTIVE); + } + + return rc; +} + +static +void _nvmf_ctrlr_destruct(void *ctx) +{ + struct spdk_nvmf_ctrlr *ctrlr = ctx; + + spdk_nvmf_ctrlr_destruct(ctrlr); +} + +static void +_spdk_nvmf_ctrlr_free_from_qpair(void *ctx) +{ + struct nvmf_qpair_disconnect_ctx *qpair_ctx = ctx; + struct spdk_nvmf_ctrlr *ctrlr = qpair_ctx->ctrlr; + uint32_t count; + + spdk_bit_array_clear(ctrlr->qpair_mask, qpair_ctx->qid); + count = spdk_bit_array_count_set(ctrlr->qpair_mask); + if (count == 0) { + spdk_bit_array_free(&ctrlr->qpair_mask); + + spdk_thread_send_msg(ctrlr->subsys->thread, _nvmf_ctrlr_destruct, ctrlr); + } + + if (qpair_ctx->cb_fn) { + spdk_thread_send_msg(qpair_ctx->thread, qpair_ctx->cb_fn, qpair_ctx->ctx); + } + free(qpair_ctx); +} + +static void +_spdk_nvmf_qpair_destroy(void *ctx, int status) +{ + struct nvmf_qpair_disconnect_ctx *qpair_ctx = ctx; + struct spdk_nvmf_qpair *qpair = qpair_ctx->qpair; + struct spdk_nvmf_ctrlr *ctrlr = qpair->ctrlr; + + assert(qpair->state == SPDK_NVMF_QPAIR_DEACTIVATING); + spdk_nvmf_qpair_set_state(qpair, SPDK_NVMF_QPAIR_INACTIVE); + qpair_ctx->qid = qpair->qid; + + TAILQ_REMOVE(&qpair->group->qpairs, qpair, link); + qpair->group = NULL; + + spdk_nvmf_transport_qpair_fini(qpair); + + if (!ctrlr || !ctrlr->thread) { + if (qpair_ctx->cb_fn) { + spdk_thread_send_msg(qpair_ctx->thread, qpair_ctx->cb_fn, qpair_ctx->ctx); + } + free(qpair_ctx); + return; + } + + qpair_ctx->ctrlr = ctrlr; + spdk_thread_send_msg(ctrlr->thread, _spdk_nvmf_ctrlr_free_from_qpair, qpair_ctx); + +} + +int +spdk_nvmf_qpair_disconnect(struct spdk_nvmf_qpair *qpair, nvmf_qpair_disconnect_cb cb_fn, void *ctx) +{ + struct nvmf_qpair_disconnect_ctx *qpair_ctx; + + /* If we get a qpair in the uninitialized state, we can just destroy it immediately */ + if (qpair->state == SPDK_NVMF_QPAIR_UNINITIALIZED) { + spdk_nvmf_transport_qpair_fini(qpair); + if (cb_fn) { + cb_fn(ctx); + } + return 0; + } + + /* The queue pair must be disconnected from the thread that owns it */ + assert(qpair->group->thread == spdk_get_thread()); + + if (qpair->state == SPDK_NVMF_QPAIR_DEACTIVATING || + qpair->state == SPDK_NVMF_QPAIR_INACTIVE) { + /* This can occur if the connection is killed by the target, + * which results in a notification that the connection + * died. Send a message to defer the processing of this + * callback. This allows the stack to unwind in the case + * where a bunch of connections are disconnected in + * a loop. */ + if (cb_fn) { + spdk_thread_send_msg(qpair->group->thread, cb_fn, ctx); + } + return 0; + } + + assert(qpair->state == SPDK_NVMF_QPAIR_ACTIVE); + spdk_nvmf_qpair_set_state(qpair, SPDK_NVMF_QPAIR_DEACTIVATING); + + qpair_ctx = calloc(1, sizeof(struct nvmf_qpair_disconnect_ctx)); + if (!qpair_ctx) { + SPDK_ERRLOG("Unable to allocate context for nvmf_qpair_disconnect\n"); + return -ENOMEM; + } + + qpair_ctx->qpair = qpair; + qpair_ctx->cb_fn = cb_fn; + qpair_ctx->thread = qpair->group->thread; + qpair_ctx->ctx = ctx; + + /* Check for outstanding I/O */ + if (!TAILQ_EMPTY(&qpair->outstanding)) { + qpair->state_cb = _spdk_nvmf_qpair_destroy; + qpair->state_cb_arg = qpair_ctx; + spdk_nvmf_qpair_free_aer(qpair); + return 0; + } + + _spdk_nvmf_qpair_destroy(qpair_ctx, 0); + + return 0; +} + +int +spdk_nvmf_qpair_get_peer_trid(struct spdk_nvmf_qpair *qpair, + struct spdk_nvme_transport_id *trid) +{ + return spdk_nvmf_transport_qpair_get_peer_trid(qpair, trid); +} + +int +spdk_nvmf_qpair_get_local_trid(struct spdk_nvmf_qpair *qpair, + struct spdk_nvme_transport_id *trid) +{ + return spdk_nvmf_transport_qpair_get_local_trid(qpair, trid); +} + +int +spdk_nvmf_qpair_get_listen_trid(struct spdk_nvmf_qpair *qpair, + struct spdk_nvme_transport_id *trid) +{ + return spdk_nvmf_transport_qpair_get_listen_trid(qpair, trid); +} + +int +spdk_nvmf_poll_group_add_transport(struct spdk_nvmf_poll_group *group, + struct spdk_nvmf_transport *transport) +{ + struct spdk_nvmf_transport_poll_group *tgroup; + + TAILQ_FOREACH(tgroup, &group->tgroups, link) { + if (tgroup->transport == transport) { + /* Transport already in the poll group */ + return 0; + } + } + + tgroup = spdk_nvmf_transport_poll_group_create(transport); + if (!tgroup) { + SPDK_ERRLOG("Unable to create poll group for transport\n"); + return -1; + } + + TAILQ_INSERT_TAIL(&group->tgroups, tgroup, link); + + return 0; +} + +static int +poll_group_update_subsystem(struct spdk_nvmf_poll_group *group, + struct spdk_nvmf_subsystem *subsystem) +{ + struct spdk_nvmf_subsystem_poll_group *sgroup; + uint32_t new_num_channels, old_num_channels; + uint32_t i; + struct spdk_nvmf_ns *ns; + + /* Make sure our poll group has memory for this subsystem allocated */ + if (subsystem->id >= group->num_sgroups) { + return -ENOMEM; + } + + sgroup = &group->sgroups[subsystem->id]; + + /* Make sure the array of channels is the correct size */ + new_num_channels = subsystem->max_nsid; + old_num_channels = sgroup->num_channels; + + if (old_num_channels == 0) { + if (new_num_channels > 0) { + /* First allocation */ + sgroup->channels = calloc(new_num_channels, sizeof(sgroup->channels[0])); + if (!sgroup->channels) { + return -ENOMEM; + } + } + } else if (new_num_channels > old_num_channels) { + void *buf; + + /* Make the array larger */ + buf = realloc(sgroup->channels, new_num_channels * sizeof(sgroup->channels[0])); + if (!buf) { + return -ENOMEM; + } + + sgroup->channels = buf; + + /* Null out the new channels slots */ + for (i = old_num_channels; i < new_num_channels; i++) { + sgroup->channels[i] = NULL; + } + } else if (new_num_channels < old_num_channels) { + void *buf; + + /* Free the extra I/O channels */ + for (i = new_num_channels; i < old_num_channels; i++) { + if (sgroup->channels[i]) { + spdk_put_io_channel(sgroup->channels[i]); + sgroup->channels[i] = NULL; + } + } + + /* Make the array smaller */ + if (new_num_channels > 0) { + buf = realloc(sgroup->channels, new_num_channels * sizeof(sgroup->channels[0])); + if (!buf) { + return -ENOMEM; + } + sgroup->channels = buf; + } else { + free(sgroup->channels); + sgroup->channels = NULL; + } + } + + sgroup->num_channels = new_num_channels; + + /* Detect bdevs that were added or removed */ + for (i = 0; i < sgroup->num_channels; i++) { + ns = subsystem->ns[i]; + if (ns == NULL && sgroup->channels[i] == NULL) { + /* Both NULL. Leave empty */ + } else if (ns == NULL && sgroup->channels[i] != NULL) { + /* There was a channel here, but the namespace is gone. */ + spdk_put_io_channel(sgroup->channels[i]); + sgroup->channels[i] = NULL; + } else if (ns != NULL && sgroup->channels[i] == NULL) { + /* A namespace appeared but there is no channel yet */ + sgroup->channels[i] = spdk_bdev_get_io_channel(ns->desc); + if (sgroup->channels[i] == NULL) { + SPDK_ERRLOG("Could not allocate I/O channel.\n"); + return -ENOMEM; + } + } else { + /* A namespace was present before and didn't change. */ + } + } + + return 0; +} + +int +spdk_nvmf_poll_group_update_subsystem(struct spdk_nvmf_poll_group *group, + struct spdk_nvmf_subsystem *subsystem) +{ + return poll_group_update_subsystem(group, subsystem); +} + +int +spdk_nvmf_poll_group_add_subsystem(struct spdk_nvmf_poll_group *group, + struct spdk_nvmf_subsystem *subsystem, + spdk_nvmf_poll_group_mod_done cb_fn, void *cb_arg) +{ + int rc = 0; + struct spdk_nvmf_subsystem_poll_group *sgroup = &group->sgroups[subsystem->id]; + + TAILQ_INIT(&sgroup->queued); + + rc = poll_group_update_subsystem(group, subsystem); + if (rc) { + spdk_nvmf_poll_group_remove_subsystem(group, subsystem, NULL, NULL); + goto fini; + } + + sgroup->state = SPDK_NVMF_SUBSYSTEM_ACTIVE; +fini: + if (cb_fn) { + cb_fn(cb_arg, rc); + } + + return rc; +} + +static void +_nvmf_poll_group_remove_subsystem_cb(void *ctx, int status) +{ + struct nvmf_qpair_disconnect_many_ctx *qpair_ctx = ctx; + struct spdk_nvmf_subsystem *subsystem; + struct spdk_nvmf_poll_group *group; + struct spdk_nvmf_subsystem_poll_group *sgroup; + spdk_nvmf_poll_group_mod_done cpl_fn = NULL; + void *cpl_ctx = NULL; + uint32_t nsid; + + group = qpair_ctx->group; + subsystem = qpair_ctx->subsystem; + cpl_fn = qpair_ctx->cpl_fn; + cpl_ctx = qpair_ctx->cpl_ctx; + sgroup = &group->sgroups[subsystem->id]; + + if (status) { + goto fini; + } + + for (nsid = 0; nsid < sgroup->num_channels; nsid++) { + if (sgroup->channels[nsid]) { + spdk_put_io_channel(sgroup->channels[nsid]); + sgroup->channels[nsid] = NULL; + } + } + + sgroup->num_channels = 0; + free(sgroup->channels); + sgroup->channels = NULL; +fini: + free(qpair_ctx); + if (cpl_fn) { + cpl_fn(cpl_ctx, status); + } +} + +static void +_nvmf_subsystem_disconnect_next_qpair(void *ctx) +{ + struct spdk_nvmf_qpair *qpair; + struct nvmf_qpair_disconnect_many_ctx *qpair_ctx = ctx; + struct spdk_nvmf_subsystem *subsystem; + struct spdk_nvmf_poll_group *group; + int rc = 0; + + group = qpair_ctx->group; + subsystem = qpair_ctx->subsystem; + + TAILQ_FOREACH(qpair, &group->qpairs, link) { + if (qpair->ctrlr->subsys == subsystem) { + break; + } + } + + if (qpair) { + rc = spdk_nvmf_qpair_disconnect(qpair, _nvmf_subsystem_disconnect_next_qpair, qpair_ctx); + } + + if (!qpair || rc != 0) { + _nvmf_poll_group_remove_subsystem_cb(ctx, rc); + } + return; +} + +void +spdk_nvmf_poll_group_remove_subsystem(struct spdk_nvmf_poll_group *group, + struct spdk_nvmf_subsystem *subsystem, + spdk_nvmf_poll_group_mod_done cb_fn, void *cb_arg) +{ + struct spdk_nvmf_qpair *qpair; + struct spdk_nvmf_subsystem_poll_group *sgroup; + struct nvmf_qpair_disconnect_many_ctx *ctx; + int rc = 0; + + ctx = calloc(1, sizeof(struct nvmf_qpair_disconnect_many_ctx)); + + if (!ctx) { + SPDK_ERRLOG("Unable to allocate memory for context to remove poll subsystem\n"); + goto fini; + } + + ctx->group = group; + ctx->subsystem = subsystem; + ctx->cpl_fn = cb_fn; + ctx->cpl_ctx = cb_arg; + + sgroup = &group->sgroups[subsystem->id]; + sgroup->state = SPDK_NVMF_SUBSYSTEM_INACTIVE; + + TAILQ_FOREACH(qpair, &group->qpairs, link) { + if (qpair->ctrlr->subsys == subsystem) { + break; + } + } + + if (qpair) { + rc = spdk_nvmf_qpair_disconnect(qpair, _nvmf_subsystem_disconnect_next_qpair, ctx); + } else { + /* call the callback immediately. It will handle any channel iteration */ + _nvmf_poll_group_remove_subsystem_cb(ctx, 0); + } + + if (rc != 0) { + free(ctx); + goto fini; + } + + return; +fini: + if (cb_fn) { + cb_fn(cb_arg, rc); + } +} + +void +spdk_nvmf_poll_group_pause_subsystem(struct spdk_nvmf_poll_group *group, + struct spdk_nvmf_subsystem *subsystem, + spdk_nvmf_poll_group_mod_done cb_fn, void *cb_arg) +{ + struct spdk_nvmf_subsystem_poll_group *sgroup; + int rc = 0; + + if (subsystem->id >= group->num_sgroups) { + rc = -1; + goto fini; + } + + sgroup = &group->sgroups[subsystem->id]; + if (sgroup == NULL) { + rc = -1; + goto fini; + } + + assert(sgroup->state == SPDK_NVMF_SUBSYSTEM_ACTIVE); + /* TODO: This currently does not quiesce I/O */ + sgroup->state = SPDK_NVMF_SUBSYSTEM_PAUSED; +fini: + if (cb_fn) { + cb_fn(cb_arg, rc); + } +} + +void +spdk_nvmf_poll_group_resume_subsystem(struct spdk_nvmf_poll_group *group, + struct spdk_nvmf_subsystem *subsystem, + spdk_nvmf_poll_group_mod_done cb_fn, void *cb_arg) +{ + struct spdk_nvmf_request *req, *tmp; + struct spdk_nvmf_subsystem_poll_group *sgroup; + int rc = 0; + + if (subsystem->id >= group->num_sgroups) { + rc = -1; + goto fini; + } + + sgroup = &group->sgroups[subsystem->id]; + + assert(sgroup->state == SPDK_NVMF_SUBSYSTEM_PAUSED); + + rc = poll_group_update_subsystem(group, subsystem); + if (rc) { + goto fini; + } + + sgroup->state = SPDK_NVMF_SUBSYSTEM_ACTIVE; + + /* Release all queued requests */ + TAILQ_FOREACH_SAFE(req, &sgroup->queued, link, tmp) { + TAILQ_REMOVE(&sgroup->queued, req, link); + spdk_nvmf_request_exec(req); + } +fini: + if (cb_fn) { + cb_fn(cb_arg, rc); + } +} |