diff options
Diffstat (limited to 'src/spdk/lib/jsonrpc')
| -rw-r--r-- | src/spdk/lib/jsonrpc/Makefile | 41 | ||||
| -rw-r--r-- | src/spdk/lib/jsonrpc/jsonrpc_client.c | 213 | ||||
| -rw-r--r-- | src/spdk/lib/jsonrpc/jsonrpc_client_tcp.c | 284 | ||||
| -rw-r--r-- | src/spdk/lib/jsonrpc/jsonrpc_internal.h | 149 | ||||
| -rw-r--r-- | src/spdk/lib/jsonrpc/jsonrpc_server.c | 360 | ||||
| -rw-r--r-- | src/spdk/lib/jsonrpc/jsonrpc_server_tcp.c | 394 |
6 files changed, 1441 insertions, 0 deletions
diff --git a/src/spdk/lib/jsonrpc/Makefile b/src/spdk/lib/jsonrpc/Makefile new file mode 100644 index 00000000..dd323f1e --- /dev/null +++ b/src/spdk/lib/jsonrpc/Makefile @@ -0,0 +1,41 @@ +# +# 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. +# + +SPDK_ROOT_DIR := $(abspath $(CURDIR)/../..) +include $(SPDK_ROOT_DIR)/mk/spdk.common.mk + +LIBNAME = jsonrpc +C_SRCS = jsonrpc_server.c jsonrpc_server_tcp.c +C_SRCS += jsonrpc_client.c jsonrpc_client_tcp.c + +include $(SPDK_ROOT_DIR)/mk/spdk.lib.mk diff --git a/src/spdk/lib/jsonrpc/jsonrpc_client.c b/src/spdk/lib/jsonrpc/jsonrpc_client.c new file mode 100644 index 00000000..2426f4e3 --- /dev/null +++ b/src/spdk/lib/jsonrpc/jsonrpc_client.c @@ -0,0 +1,213 @@ +/*- + * 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/util.h" +#include "jsonrpc_internal.h" + +struct jsonrpc_response { + const struct spdk_json_val *version; + const struct spdk_json_val *id; + const struct spdk_json_val *result; +}; + +static int +capture_string(const struct spdk_json_val *val, void *out) +{ + const struct spdk_json_val **vptr = out; + + if (spdk_json_strequal(val, "2.0") != true) { + return SPDK_JSON_PARSE_INVALID; + } + + *vptr = val; + return 0; +} + +static int +capture_id(const struct spdk_json_val *val, void *out) +{ + const struct spdk_json_val **vptr = out; + + if (val->type != SPDK_JSON_VAL_STRING && val->type != SPDK_JSON_VAL_NUMBER) { + return SPDK_JSON_PARSE_INVALID; + } + + *vptr = val; + return 0; +} + +static int +capture_any(const struct spdk_json_val *val, void *out) +{ + const struct spdk_json_val **vptr = out; + + *vptr = val; + return 0; +} + +static const struct spdk_json_object_decoder jsonrpc_response_decoders[] = { + {"jsonrpc", offsetof(struct jsonrpc_response, version), capture_string}, + {"id", offsetof(struct jsonrpc_response, id), capture_id}, + {"result", offsetof(struct jsonrpc_response, result), capture_any}, +}; + +static int +parse_single_response(struct spdk_json_val *values, + spdk_jsonrpc_client_response_parser parser_fn, + void *parser_ctx) +{ + struct jsonrpc_response resp = {}; + + if (spdk_json_decode_object(values, jsonrpc_response_decoders, + SPDK_COUNTOF(jsonrpc_response_decoders), + &resp)) { + return SPDK_JSON_PARSE_INVALID; + } + + return parser_fn(parser_ctx, resp.result); +} + +int +spdk_jsonrpc_parse_response(struct spdk_jsonrpc_client *client, void *json, size_t size) +{ + ssize_t rc; + void *end = NULL; + + /* Check to see if we have received a full JSON value. */ + rc = spdk_json_parse(json, size, NULL, 0, &end, 0); + if (rc == SPDK_JSON_PARSE_INCOMPLETE) { + return rc; + } + + SPDK_DEBUGLOG(SPDK_LOG_RPC_CLIENT, "Json string is :\n%s\n", (char *)json); + if (rc < 0 || rc > SPDK_JSONRPC_MAX_VALUES) { + SPDK_ERRLOG("JSON parse error\n"); + /* + * Can't recover from parse error (no guaranteed resync point in streaming JSON). + * Return an error to indicate that the connection should be closed. + */ + return SPDK_JSON_PARSE_INVALID; + } + + /* Decode a second time now that there is a full JSON value available. */ + rc = spdk_json_parse(json, size, client->values, SPDK_JSONRPC_MAX_VALUES, &end, + SPDK_JSON_PARSE_FLAG_DECODE_IN_PLACE); + if (rc < 0 || rc > SPDK_JSONRPC_MAX_VALUES) { + SPDK_ERRLOG("JSON parse error on second pass\n"); + return SPDK_JSON_PARSE_INVALID; + } + + assert(end != NULL); + + if (client->values[0].type != SPDK_JSON_VAL_OBJECT_BEGIN) { + SPDK_ERRLOG("top-level JSON value was not object\n"); + return SPDK_JSON_PARSE_INVALID; + } + + rc = parse_single_response(client->values, client->parser_fn, client->parser_ctx); + + return rc; +} + +static int +jsonrpc_client_write_cb(void *cb_ctx, const void *data, size_t size) +{ + struct spdk_jsonrpc_client_request *request = cb_ctx; + size_t new_size = request->send_buf_size; + + while (new_size - request->send_len < size) { + if (new_size >= SPDK_JSONRPC_SEND_BUF_SIZE_MAX) { + SPDK_ERRLOG("Send buf exceeded maximum size (%zu)\n", + (size_t)SPDK_JSONRPC_SEND_BUF_SIZE_MAX); + return -ENOSPC; + } + + new_size *= 2; + } + + if (new_size != request->send_buf_size) { + uint8_t *new_buf; + + new_buf = realloc(request->send_buf, new_size); + if (new_buf == NULL) { + SPDK_ERRLOG("Resizing send_buf failed (current size %zu, new size %zu)\n", + request->send_buf_size, new_size); + return -ENOMEM; + } + + request->send_buf = new_buf; + request->send_buf_size = new_size; + } + + memcpy(request->send_buf + request->send_len, data, size); + request->send_len += size; + + return 0; +} + +struct spdk_json_write_ctx * +spdk_jsonrpc_begin_request(struct spdk_jsonrpc_client_request *request, int32_t id, + const char *method) +{ + struct spdk_json_write_ctx *w; + + w = spdk_json_write_begin(jsonrpc_client_write_cb, request, 0); + if (w == NULL) { + return NULL; + } + + spdk_json_write_object_begin(w); + spdk_json_write_named_string(w, "jsonrpc", "2.0"); + + if (id >= 0) { + spdk_json_write_named_int32(w, "id", id); + } + + if (method) { + spdk_json_write_named_string(w, "method", method); + } + + return w; +} + +void +spdk_jsonrpc_end_request(struct spdk_jsonrpc_client_request *request, struct spdk_json_write_ctx *w) +{ + assert(w != NULL); + + spdk_json_write_object_end(w); + spdk_json_write_end(w); + jsonrpc_client_write_cb(request, "\n", 1); +} + +SPDK_LOG_REGISTER_COMPONENT("rpc_client", SPDK_LOG_RPC_CLIENT) diff --git a/src/spdk/lib/jsonrpc/jsonrpc_client_tcp.c b/src/spdk/lib/jsonrpc/jsonrpc_client_tcp.c new file mode 100644 index 00000000..a7696c84 --- /dev/null +++ b/src/spdk/lib/jsonrpc/jsonrpc_client_tcp.c @@ -0,0 +1,284 @@ +/*- + * 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/string.h" +#include "jsonrpc_internal.h" + +#define RPC_DEFAULT_PORT "5260" + +static struct spdk_jsonrpc_client * +_spdk_jsonrpc_client_connect(int domain, int protocol, + struct sockaddr *server_addr, socklen_t addrlen) +{ + struct spdk_jsonrpc_client *client; + int rc; + + client = calloc(1, sizeof(struct spdk_jsonrpc_client)); + if (client == NULL) { + return NULL; + } + + client->sockfd = socket(domain, SOCK_STREAM, protocol); + if (client->sockfd < 0) { + SPDK_ERRLOG("socket() failed\n"); + free(client); + return NULL; + } + + rc = connect(client->sockfd, server_addr, addrlen); + if (rc != 0) { + SPDK_ERRLOG("could not connet JSON-RPC server: %s\n", spdk_strerror(errno)); + close(client->sockfd); + free(client); + return NULL; + } + + /* memory malloc for recv-buf */ + client->recv_buf = malloc(SPDK_JSONRPC_SEND_BUF_SIZE_INIT); + if (!client->recv_buf) { + SPDK_ERRLOG("memory malloc for recv-buf failed\n"); + close(client->sockfd); + free(client); + return NULL; + } + client->recv_buf_size = SPDK_JSONRPC_SEND_BUF_SIZE_INIT; + + return client; +} + +struct spdk_jsonrpc_client * +spdk_jsonrpc_client_connect(const char *rpc_sock_addr, int addr_family) +{ + struct spdk_jsonrpc_client *client; + + if (addr_family == AF_UNIX) { + /* Unix Domain Socket */ + struct sockaddr_un rpc_sock_addr_unix = {}; + int rc; + + rpc_sock_addr_unix.sun_family = AF_UNIX; + rc = snprintf(rpc_sock_addr_unix.sun_path, + sizeof(rpc_sock_addr_unix.sun_path), + "%s", rpc_sock_addr); + if (rc < 0 || (size_t)rc >= sizeof(rpc_sock_addr_unix.sun_path)) { + SPDK_ERRLOG("RPC Listen address Unix socket path too long\n"); + return NULL; + } + + client = _spdk_jsonrpc_client_connect(AF_UNIX, 0, + (struct sockaddr *)&rpc_sock_addr_unix, + sizeof(rpc_sock_addr_unix)); + } else { + /* TCP/IP socket */ + struct addrinfo hints; + struct addrinfo *res; + char *tmp; + char *host, *port; + + tmp = strdup(rpc_sock_addr); + if (!tmp) { + SPDK_ERRLOG("Out of memory\n"); + return NULL; + } + + if (spdk_parse_ip_addr(tmp, &host, &port) < 0) { + free(tmp); + SPDK_ERRLOG("Invalid listen address '%s'\n", rpc_sock_addr); + return NULL; + } + + if (port == NULL) { + port = RPC_DEFAULT_PORT; + } + + memset(&hints, 0, sizeof(hints)); + hints.ai_family = AF_UNSPEC; + hints.ai_socktype = SOCK_STREAM; + hints.ai_protocol = IPPROTO_TCP; + + if (getaddrinfo(host, port, &hints, &res) != 0) { + free(tmp); + SPDK_ERRLOG("Unable to look up RPC connnect address '%s'\n", rpc_sock_addr); + return NULL; + } + + client = _spdk_jsonrpc_client_connect(res->ai_family, res->ai_protocol, + res->ai_addr, res->ai_addrlen); + + freeaddrinfo(res); + free(tmp); + } + + return client; +} + +void +spdk_jsonrpc_client_close(struct spdk_jsonrpc_client *client) +{ + if (client->sockfd >= 0) { + close(client->sockfd); + free(client->recv_buf); + client->sockfd = -1; + } + + free(client); +} + +struct spdk_jsonrpc_client_request * +spdk_jsonrpc_client_create_request(void) +{ + struct spdk_jsonrpc_client_request *request; + + request = calloc(1, sizeof(*request)); + if (request == NULL) { + return NULL; + } + + /* memory malloc for send-buf */ + request->send_buf = malloc(SPDK_JSONRPC_SEND_BUF_SIZE_INIT); + if (!request->send_buf) { + SPDK_ERRLOG("memory malloc for send-buf failed\n"); + free(request); + return NULL; + } + request->send_buf_size = SPDK_JSONRPC_SEND_BUF_SIZE_INIT; + + return request; +} + +void +spdk_jsonrpc_client_free_request(struct spdk_jsonrpc_client_request *req) +{ + free(req->send_buf); + free(req); +} + +int +spdk_jsonrpc_client_send_request(struct spdk_jsonrpc_client *client, + struct spdk_jsonrpc_client_request *request) +{ + ssize_t rc; + + /* Reset offset in request */ + request->send_offset = 0; + + while (request->send_len > 0) { + rc = send(client->sockfd, request->send_buf + request->send_offset, + request->send_len, 0); + if (rc <= 0) { + if (rc < 0 && errno == EINTR) { + rc = 0; + } else { + return rc; + } + } + + request->send_offset += rc; + request->send_len -= rc; + } + + return 0; +} + +static int +recv_buf_expand(struct spdk_jsonrpc_client *client) +{ + uint8_t *new_buf; + + if (client->recv_buf_size * 2 > SPDK_JSONRPC_SEND_BUF_SIZE_MAX) { + return -ENOSPC; + } + + new_buf = realloc(client->recv_buf, client->recv_buf_size * 2); + if (new_buf == NULL) { + SPDK_ERRLOG("Resizing recv_buf failed (current size %zu, new size %zu)\n", + client->recv_buf_size, client->recv_buf_size * 2); + return -ENOMEM; + } + + client->recv_buf = new_buf; + client->recv_buf_size *= 2; + + return 0; +} + +int +spdk_jsonrpc_client_recv_response(struct spdk_jsonrpc_client *client, + spdk_jsonrpc_client_response_parser parser_fn, + void *parser_ctx) +{ + ssize_t rc = 0; + size_t recv_avail; + size_t recv_offset = 0; + + client->parser_fn = parser_fn; + client->parser_ctx = parser_ctx; + + recv_avail = client->recv_buf_size; + + while (recv_avail > 0) { + rc = recv(client->sockfd, client->recv_buf + recv_offset, recv_avail, 0); + if (rc < 0) { + if (errno == EINTR) { + continue; + } else { + return errno; + } + } else if (rc == 0) { + return -EIO; + } + + recv_offset += rc; + recv_avail -= rc; + + /* Check to see if we have received a full JSON value. */ + rc = spdk_jsonrpc_parse_response(client, client->recv_buf, recv_offset); + if (rc == 0) { + /* Successfully parsed response */ + return 0; + } else if (rc != SPDK_JSON_PARSE_INCOMPLETE) { + SPDK_ERRLOG("jsonrpc parse request failed\n"); + return -EINVAL; + } + + /* Expand receive buffer if larger one is needed */ + if (recv_avail == 0) { + rc = recv_buf_expand(client); + if (rc != 0) { + return rc; + } + recv_avail = client->recv_buf_size - recv_offset; + } + } + + return 0; +} diff --git a/src/spdk/lib/jsonrpc/jsonrpc_internal.h b/src/spdk/lib/jsonrpc/jsonrpc_internal.h new file mode 100644 index 00000000..87355fdb --- /dev/null +++ b/src/spdk/lib/jsonrpc/jsonrpc_internal.h @@ -0,0 +1,149 @@ +/*- + * 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. + */ + +#ifndef SPDK_JSONRPC_INTERNAL_H_ +#define SPDK_JSONRPC_INTERNAL_H_ + +#include "spdk/stdinc.h" + +#include "spdk/jsonrpc.h" + +#include "spdk_internal/log.h" + +#define SPDK_JSONRPC_RECV_BUF_SIZE (32 * 1024) +#define SPDK_JSONRPC_SEND_BUF_SIZE_INIT (32 * 1024) +#define SPDK_JSONRPC_SEND_BUF_SIZE_MAX (32 * 1024 * 1024) +#define SPDK_JSONRPC_ID_MAX_LEN 128 +#define SPDK_JSONRPC_MAX_CONNS 64 +#define SPDK_JSONRPC_MAX_VALUES 1024 + +struct spdk_jsonrpc_request { + struct spdk_jsonrpc_server_conn *conn; + + /* Copy of request id value */ + struct spdk_json_val id; + uint8_t id_data[SPDK_JSONRPC_ID_MAX_LEN]; + + /* Total space allocated for send_buf */ + size_t send_buf_size; + + /* Number of bytes used in send_buf (<= send_buf_size) */ + size_t send_len; + + size_t send_offset; + + uint8_t *send_buf; + + STAILQ_ENTRY(spdk_jsonrpc_request) link; +}; + +struct spdk_jsonrpc_server_conn { + struct spdk_jsonrpc_server *server; + int sockfd; + bool closed; + struct spdk_json_val values[SPDK_JSONRPC_MAX_VALUES]; + size_t recv_len; + uint8_t recv_buf[SPDK_JSONRPC_RECV_BUF_SIZE]; + uint32_t outstanding_requests; + + pthread_spinlock_t queue_lock; + STAILQ_HEAD(, spdk_jsonrpc_request) send_queue; + + struct spdk_jsonrpc_request *send_request; + + TAILQ_ENTRY(spdk_jsonrpc_server_conn) link; +}; + +struct spdk_jsonrpc_server { + int sockfd; + spdk_jsonrpc_handle_request_fn handle_request; + + TAILQ_HEAD(, spdk_jsonrpc_server_conn) free_conns; + TAILQ_HEAD(, spdk_jsonrpc_server_conn) conns; + + struct spdk_jsonrpc_server_conn conns_array[SPDK_JSONRPC_MAX_CONNS]; +}; + +struct spdk_jsonrpc_client_request { + /* Total space allocated for send_buf */ + size_t send_buf_size; + + /* Number of bytes used in send_buf (<= send_buf_size) */ + size_t send_len; + + size_t send_offset; + + uint8_t *send_buf; +}; + +struct spdk_jsonrpc_client { + int sockfd; + + struct spdk_json_val values[SPDK_JSONRPC_MAX_VALUES]; + size_t recv_buf_size; + uint8_t *recv_buf; + + spdk_jsonrpc_client_response_parser parser_fn; + void *parser_ctx; +}; + +/* jsonrpc_server_tcp */ +void spdk_jsonrpc_server_handle_request(struct spdk_jsonrpc_request *request, + const struct spdk_json_val *method, + const struct spdk_json_val *params); +void spdk_jsonrpc_server_handle_error(struct spdk_jsonrpc_request *request, int error); + +/* Might be called from any thread */ +void spdk_jsonrpc_server_send_response(struct spdk_jsonrpc_request *request); + +/* jsonrpc_server */ +int spdk_jsonrpc_parse_request(struct spdk_jsonrpc_server_conn *conn, void *json, size_t size); + +/* Must be called only from server poll thread */ +void spdk_jsonrpc_free_request(struct spdk_jsonrpc_request *request); + +/* + * Parse JSON data as RPC command response. + * + * \param client structure pointer of jsonrpc client + * \param json Raw JSON data; must be encoded in UTF-8. + * \param size Size of data in bytes. + * + * \return 0 On success + * SPDK_JSON_PARSE_INCOMPLETE If the provided data is not a complete JSON value + * SPDK_JSON_PARSE_INVALID if the provided data has invalid JSON syntax. + */ +int spdk_jsonrpc_parse_response(struct spdk_jsonrpc_client *client, void *json, + size_t size); + +#endif diff --git a/src/spdk/lib/jsonrpc/jsonrpc_server.c b/src/spdk/lib/jsonrpc/jsonrpc_server.c new file mode 100644 index 00000000..6e2a5b2c --- /dev/null +++ b/src/spdk/lib/jsonrpc/jsonrpc_server.c @@ -0,0 +1,360 @@ +/*- + * 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 "jsonrpc_internal.h" + +#include "spdk/util.h" + +struct jsonrpc_request { + const struct spdk_json_val *version; + const struct spdk_json_val *method; + const struct spdk_json_val *params; + const struct spdk_json_val *id; +}; + +static int +capture_val(const struct spdk_json_val *val, void *out) +{ + const struct spdk_json_val **vptr = out; + + *vptr = val; + return 0; +} + +static const struct spdk_json_object_decoder jsonrpc_request_decoders[] = { + {"jsonrpc", offsetof(struct jsonrpc_request, version), capture_val, true}, + {"method", offsetof(struct jsonrpc_request, method), capture_val}, + {"params", offsetof(struct jsonrpc_request, params), capture_val, true}, + {"id", offsetof(struct jsonrpc_request, id), capture_val, true}, +}; + +static void +parse_single_request(struct spdk_jsonrpc_request *request, struct spdk_json_val *values) +{ + bool invalid = false; + struct jsonrpc_request req = {}; + + if (spdk_json_decode_object(values, jsonrpc_request_decoders, + SPDK_COUNTOF(jsonrpc_request_decoders), + &req)) { + invalid = true; + goto done; + } + + if (req.version && (req.version->type != SPDK_JSON_VAL_STRING || + !spdk_json_strequal(req.version, "2.0"))) { + invalid = true; + } + + if (!req.method || req.method->type != SPDK_JSON_VAL_STRING) { + req.method = NULL; + invalid = true; + } + + if (req.id) { + if (req.id->type == SPDK_JSON_VAL_STRING || + req.id->type == SPDK_JSON_VAL_NUMBER) { + /* Copy value into request */ + if (req.id->len <= SPDK_JSONRPC_ID_MAX_LEN) { + request->id.type = req.id->type; + request->id.len = req.id->len; + memcpy(request->id.start, req.id->start, req.id->len); + } else { + SPDK_DEBUGLOG(SPDK_LOG_RPC, "JSON-RPC request id too long (%u)\n", + req.id->len); + invalid = true; + } + } else if (req.id->type == SPDK_JSON_VAL_NULL) { + request->id.type = SPDK_JSON_VAL_NULL; + } else { + invalid = true; + } + } + + if (req.params) { + if (req.params->type != SPDK_JSON_VAL_ARRAY_BEGIN && + req.params->type != SPDK_JSON_VAL_OBJECT_BEGIN) { + req.params = NULL; + invalid = true; + } + } + +done: + if (invalid) { + spdk_jsonrpc_server_handle_error(request, SPDK_JSONRPC_ERROR_INVALID_REQUEST); + } else { + spdk_jsonrpc_server_handle_request(request, req.method, req.params); + } +} + +int +spdk_jsonrpc_parse_request(struct spdk_jsonrpc_server_conn *conn, void *json, size_t size) +{ + struct spdk_jsonrpc_request *request; + ssize_t rc; + void *end = NULL; + + /* Check to see if we have received a full JSON value. */ + rc = spdk_json_parse(json, size, NULL, 0, &end, 0); + if (rc == SPDK_JSON_PARSE_INCOMPLETE) { + return 0; + } + + request = calloc(1, sizeof(*request)); + if (request == NULL) { + SPDK_DEBUGLOG(SPDK_LOG_RPC, "Out of memory allocating request\n"); + return -1; + } + + conn->outstanding_requests++; + + request->conn = conn; + request->id.start = request->id_data; + request->id.len = 0; + request->id.type = SPDK_JSON_VAL_INVALID; + request->send_offset = 0; + request->send_len = 0; + request->send_buf_size = SPDK_JSONRPC_SEND_BUF_SIZE_INIT; + request->send_buf = malloc(request->send_buf_size); + if (request->send_buf == NULL) { + SPDK_ERRLOG("Failed to allocate send_buf (%zu bytes)\n", request->send_buf_size); + conn->outstanding_requests--; + free(request); + return -1; + } + + if (rc < 0 || rc > SPDK_JSONRPC_MAX_VALUES) { + SPDK_DEBUGLOG(SPDK_LOG_RPC, "JSON parse error\n"); + spdk_jsonrpc_server_handle_error(request, SPDK_JSONRPC_ERROR_PARSE_ERROR); + + /* + * Can't recover from parse error (no guaranteed resync point in streaming JSON). + * Return an error to indicate that the connection should be closed. + */ + return -1; + } + + /* Decode a second time now that there is a full JSON value available. */ + rc = spdk_json_parse(json, size, conn->values, SPDK_JSONRPC_MAX_VALUES, &end, + SPDK_JSON_PARSE_FLAG_DECODE_IN_PLACE); + if (rc < 0 || rc > SPDK_JSONRPC_MAX_VALUES) { + SPDK_DEBUGLOG(SPDK_LOG_RPC, "JSON parse error on second pass\n"); + spdk_jsonrpc_server_handle_error(request, SPDK_JSONRPC_ERROR_PARSE_ERROR); + return -1; + } + + assert(end != NULL); + + if (conn->values[0].type == SPDK_JSON_VAL_OBJECT_BEGIN) { + parse_single_request(request, conn->values); + } else if (conn->values[0].type == SPDK_JSON_VAL_ARRAY_BEGIN) { + SPDK_DEBUGLOG(SPDK_LOG_RPC, "Got batch array (not currently supported)\n"); + spdk_jsonrpc_server_handle_error(request, SPDK_JSONRPC_ERROR_INVALID_REQUEST); + } else { + SPDK_DEBUGLOG(SPDK_LOG_RPC, "top-level JSON value was not array or object\n"); + spdk_jsonrpc_server_handle_error(request, SPDK_JSONRPC_ERROR_INVALID_REQUEST); + } + + return end - json; +} + +static int +spdk_jsonrpc_server_write_cb(void *cb_ctx, const void *data, size_t size) +{ + struct spdk_jsonrpc_request *request = cb_ctx; + size_t new_size = request->send_buf_size; + + while (new_size - request->send_len < size) { + if (new_size >= SPDK_JSONRPC_SEND_BUF_SIZE_MAX) { + SPDK_ERRLOG("Send buf exceeded maximum size (%zu)\n", + (size_t)SPDK_JSONRPC_SEND_BUF_SIZE_MAX); + return -1; + } + + new_size *= 2; + } + + if (new_size != request->send_buf_size) { + uint8_t *new_buf; + + new_buf = realloc(request->send_buf, new_size); + if (new_buf == NULL) { + SPDK_ERRLOG("Resizing send_buf failed (current size %zu, new size %zu)\n", + request->send_buf_size, new_size); + return -1; + } + + request->send_buf = new_buf; + request->send_buf_size = new_size; + } + + memcpy(request->send_buf + request->send_len, data, size); + request->send_len += size; + + return 0; +} + +static struct spdk_json_write_ctx * +begin_response(struct spdk_jsonrpc_request *request) +{ + struct spdk_json_write_ctx *w; + + w = spdk_json_write_begin(spdk_jsonrpc_server_write_cb, request, 0); + if (w == NULL) { + return NULL; + } + + spdk_json_write_object_begin(w); + spdk_json_write_name(w, "jsonrpc"); + spdk_json_write_string(w, "2.0"); + + spdk_json_write_name(w, "id"); + spdk_json_write_val(w, &request->id); + + return w; +} + +static void +skip_response(struct spdk_jsonrpc_request *request) +{ + request->send_len = 0; + spdk_jsonrpc_server_send_response(request); +} + +static void +end_response(struct spdk_jsonrpc_request *request, struct spdk_json_write_ctx *w) +{ + spdk_json_write_object_end(w); + spdk_json_write_end(w); + spdk_jsonrpc_server_write_cb(request, "\n", 1); + spdk_jsonrpc_server_send_response(request); +} + +void +spdk_jsonrpc_free_request(struct spdk_jsonrpc_request *request) +{ + request->conn->outstanding_requests--; + free(request->send_buf); + free(request); +} + +struct spdk_json_write_ctx * +spdk_jsonrpc_begin_result(struct spdk_jsonrpc_request *request) +{ + struct spdk_json_write_ctx *w; + + if (request->id.type == SPDK_JSON_VAL_INVALID) { + /* Notification - no response required */ + skip_response(request); + return NULL; + } + + w = begin_response(request); + if (w == NULL) { + skip_response(request); + return NULL; + } + + spdk_json_write_name(w, "result"); + + return w; +} + +void +spdk_jsonrpc_end_result(struct spdk_jsonrpc_request *request, struct spdk_json_write_ctx *w) +{ + assert(w != NULL); + + end_response(request, w); +} + +void +spdk_jsonrpc_send_error_response(struct spdk_jsonrpc_request *request, + int error_code, const char *msg) +{ + struct spdk_json_write_ctx *w; + + if (request->id.type == SPDK_JSON_VAL_INVALID) { + /* For error responses, if id is missing, explicitly respond with "id": null. */ + request->id.type = SPDK_JSON_VAL_NULL; + } + + w = begin_response(request); + if (w == NULL) { + skip_response(request); + return; + } + + spdk_json_write_name(w, "error"); + spdk_json_write_object_begin(w); + spdk_json_write_name(w, "code"); + spdk_json_write_int32(w, error_code); + spdk_json_write_name(w, "message"); + spdk_json_write_string(w, msg); + spdk_json_write_object_end(w); + + end_response(request, w); +} + +void +spdk_jsonrpc_send_error_response_fmt(struct spdk_jsonrpc_request *request, + int error_code, const char *fmt, ...) +{ + struct spdk_json_write_ctx *w; + va_list args; + + if (request->id.type == SPDK_JSON_VAL_INVALID) { + /* For error responses, if id is missing, explicitly respond with "id": null. */ + request->id.type = SPDK_JSON_VAL_NULL; + } + + w = begin_response(request); + if (w == NULL) { + skip_response(request); + return; + } + + spdk_json_write_name(w, "error"); + spdk_json_write_object_begin(w); + spdk_json_write_name(w, "code"); + spdk_json_write_int32(w, error_code); + spdk_json_write_name(w, "message"); + va_start(args, fmt); + spdk_json_write_string_fmt_v(w, fmt, args); + va_end(args); + spdk_json_write_object_end(w); + + end_response(request, w); +} + +SPDK_LOG_REGISTER_COMPONENT("rpc", SPDK_LOG_RPC) diff --git a/src/spdk/lib/jsonrpc/jsonrpc_server_tcp.c b/src/spdk/lib/jsonrpc/jsonrpc_server_tcp.c new file mode 100644 index 00000000..c69d7483 --- /dev/null +++ b/src/spdk/lib/jsonrpc/jsonrpc_server_tcp.c @@ -0,0 +1,394 @@ +/*- + * 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 "jsonrpc_internal.h" +#include "spdk/string.h" + +struct spdk_jsonrpc_server * +spdk_jsonrpc_server_listen(int domain, int protocol, + struct sockaddr *listen_addr, socklen_t addrlen, + spdk_jsonrpc_handle_request_fn handle_request) +{ + struct spdk_jsonrpc_server *server; + int rc, val, flag, i; + + server = calloc(1, sizeof(struct spdk_jsonrpc_server)); + if (server == NULL) { + return NULL; + } + + TAILQ_INIT(&server->free_conns); + TAILQ_INIT(&server->conns); + + for (i = 0; i < SPDK_JSONRPC_MAX_CONNS; i++) { + TAILQ_INSERT_TAIL(&server->free_conns, &server->conns_array[i], link); + } + + server->handle_request = handle_request; + + server->sockfd = socket(domain, SOCK_STREAM, protocol); + if (server->sockfd < 0) { + SPDK_ERRLOG("socket() failed\n"); + free(server); + return NULL; + } + + val = 1; + setsockopt(server->sockfd, SOL_SOCKET, SO_REUSEADDR, &val, sizeof(val)); + if (protocol == IPPROTO_TCP) { + setsockopt(server->sockfd, IPPROTO_TCP, TCP_NODELAY, &val, sizeof(val)); + } + + flag = fcntl(server->sockfd, F_GETFL); + if (fcntl(server->sockfd, F_SETFL, flag | O_NONBLOCK) < 0) { + SPDK_ERRLOG("fcntl can't set nonblocking mode for socket, fd: %d (%s)\n", + server->sockfd, spdk_strerror(errno)); + close(server->sockfd); + free(server); + return NULL; + } + + rc = bind(server->sockfd, listen_addr, addrlen); + if (rc != 0) { + SPDK_ERRLOG("could not bind JSON-RPC server: %s\n", spdk_strerror(errno)); + close(server->sockfd); + free(server); + return NULL; + } + + rc = listen(server->sockfd, 512); + if (rc != 0) { + SPDK_ERRLOG("listen() failed, errno = %d\n", errno); + close(server->sockfd); + free(server); + return NULL; + } + + return server; +} + +void +spdk_jsonrpc_server_shutdown(struct spdk_jsonrpc_server *server) +{ + struct spdk_jsonrpc_server_conn *conn; + + close(server->sockfd); + + TAILQ_FOREACH(conn, &server->conns, link) { + close(conn->sockfd); + } + + free(server); +} + +static void +spdk_jsonrpc_server_conn_close(struct spdk_jsonrpc_server_conn *conn) +{ + conn->closed = true; + + if (conn->sockfd >= 0) { + close(conn->sockfd); + conn->sockfd = -1; + } +} + +static void +spdk_jsonrpc_server_conn_remove(struct spdk_jsonrpc_server_conn *conn) +{ + struct spdk_jsonrpc_server *server = conn->server; + + spdk_jsonrpc_server_conn_close(conn); + + pthread_spin_destroy(&conn->queue_lock); + assert(STAILQ_EMPTY(&conn->send_queue)); + + TAILQ_REMOVE(&server->conns, conn, link); + TAILQ_INSERT_HEAD(&server->free_conns, conn, link); +} + +static int +spdk_jsonrpc_server_accept(struct spdk_jsonrpc_server *server) +{ + struct spdk_jsonrpc_server_conn *conn; + int rc, flag; + + rc = accept(server->sockfd, NULL, NULL); + if (rc >= 0) { + conn = TAILQ_FIRST(&server->free_conns); + assert(conn != NULL); + + conn->server = server; + conn->sockfd = rc; + conn->closed = false; + conn->recv_len = 0; + conn->outstanding_requests = 0; + pthread_spin_init(&conn->queue_lock, PTHREAD_PROCESS_PRIVATE); + STAILQ_INIT(&conn->send_queue); + conn->send_request = NULL; + + flag = fcntl(conn->sockfd, F_GETFL); + if (fcntl(conn->sockfd, F_SETFL, flag | O_NONBLOCK) < 0) { + SPDK_ERRLOG("fcntl can't set nonblocking mode for socket, fd: %d (%s)\n", + conn->sockfd, spdk_strerror(errno)); + close(conn->sockfd); + return -1; + } + + TAILQ_REMOVE(&server->free_conns, conn, link); + TAILQ_INSERT_TAIL(&server->conns, conn, link); + return 0; + } + + if (errno == EAGAIN || errno == EWOULDBLOCK || errno == EINTR) { + return 0; + } + + return -1; +} + +void +spdk_jsonrpc_server_handle_request(struct spdk_jsonrpc_request *request, + const struct spdk_json_val *method, const struct spdk_json_val *params) +{ + request->conn->server->handle_request(request, method, params); +} + +void +spdk_jsonrpc_server_handle_error(struct spdk_jsonrpc_request *request, int error) +{ + const char *msg; + + switch (error) { + case SPDK_JSONRPC_ERROR_PARSE_ERROR: + msg = "Parse error"; + break; + + case SPDK_JSONRPC_ERROR_INVALID_REQUEST: + msg = "Invalid request"; + break; + + case SPDK_JSONRPC_ERROR_METHOD_NOT_FOUND: + msg = "Method not found"; + break; + + case SPDK_JSONRPC_ERROR_INVALID_PARAMS: + msg = "Invalid parameters"; + break; + + case SPDK_JSONRPC_ERROR_INTERNAL_ERROR: + msg = "Internal error"; + break; + + default: + msg = "Error"; + break; + } + + spdk_jsonrpc_send_error_response(request, error, msg); +} + +static int +spdk_jsonrpc_server_conn_recv(struct spdk_jsonrpc_server_conn *conn) +{ + ssize_t rc; + size_t recv_avail = SPDK_JSONRPC_RECV_BUF_SIZE - conn->recv_len; + + rc = recv(conn->sockfd, conn->recv_buf + conn->recv_len, recv_avail, 0); + if (rc == -1) { + if (errno == EAGAIN || errno == EWOULDBLOCK || errno == EINTR) { + return 0; + } + SPDK_DEBUGLOG(SPDK_LOG_RPC, "recv() failed: %s\n", spdk_strerror(errno)); + return -1; + } + + if (rc == 0) { + SPDK_DEBUGLOG(SPDK_LOG_RPC, "remote closed connection\n"); + return -1; + } + + conn->recv_len += rc; + + rc = spdk_jsonrpc_parse_request(conn, conn->recv_buf, conn->recv_len); + if (rc < 0) { + SPDK_ERRLOG("jsonrpc parse request failed\n"); + return -1; + } + + if (rc > 0) { + /* + * Successfully parsed a request - move any data past the end of the + * parsed request down to the beginning. + */ + assert((size_t)rc <= conn->recv_len); + memmove(conn->recv_buf, conn->recv_buf + rc, conn->recv_len - rc); + conn->recv_len -= rc; + } + + return 0; +} + +void +spdk_jsonrpc_server_send_response(struct spdk_jsonrpc_request *request) +{ + struct spdk_jsonrpc_server_conn *conn = request->conn; + + /* Queue the response to be sent */ + pthread_spin_lock(&conn->queue_lock); + STAILQ_INSERT_TAIL(&conn->send_queue, request, link); + pthread_spin_unlock(&conn->queue_lock); +} + +static struct spdk_jsonrpc_request * +spdk_jsonrpc_server_dequeue_request(struct spdk_jsonrpc_server_conn *conn) +{ + struct spdk_jsonrpc_request *request = NULL; + + pthread_spin_lock(&conn->queue_lock); + request = STAILQ_FIRST(&conn->send_queue); + if (request) { + STAILQ_REMOVE_HEAD(&conn->send_queue, link); + } + pthread_spin_unlock(&conn->queue_lock); + return request; +} + + +static int +spdk_jsonrpc_server_conn_send(struct spdk_jsonrpc_server_conn *conn) +{ + struct spdk_jsonrpc_request *request; + ssize_t rc; + +more: + if (conn->outstanding_requests == 0) { + return 0; + } + + if (conn->send_request == NULL) { + conn->send_request = spdk_jsonrpc_server_dequeue_request(conn); + } + + request = conn->send_request; + if (request == NULL) { + /* Nothing to send right now */ + return 0; + } + + if (request->send_len > 0) { + rc = send(conn->sockfd, request->send_buf + request->send_offset, + request->send_len, 0); + if (rc < 0) { + if (errno == EAGAIN || errno == EWOULDBLOCK || errno == EINTR) { + return 0; + } + + SPDK_DEBUGLOG(SPDK_LOG_RPC, "send() failed: %s\n", spdk_strerror(errno)); + return -1; + } + + request->send_offset += rc; + request->send_len -= rc; + } + + if (request->send_len == 0) { + /* + * Full response has been sent. + * Free it and set send_request to NULL to move on to the next queued response. + */ + conn->send_request = NULL; + spdk_jsonrpc_free_request(request); + goto more; + } + + return 0; +} + +int +spdk_jsonrpc_server_poll(struct spdk_jsonrpc_server *server) +{ + int rc; + struct spdk_jsonrpc_server_conn *conn, *conn_tmp; + + TAILQ_FOREACH_SAFE(conn, &server->conns, link, conn_tmp) { + if (conn->closed) { + struct spdk_jsonrpc_request *request; + + /* + * The client closed the connection, but there may still be requests + * outstanding; we have no way to cancel outstanding requests, so wait until + * each outstanding request sends a response (which will be discarded, since + * the connection is closed). + */ + + if (conn->send_request) { + spdk_jsonrpc_free_request(conn->send_request); + conn->send_request = NULL; + } + + while ((request = spdk_jsonrpc_server_dequeue_request(conn)) != NULL) { + spdk_jsonrpc_free_request(request); + } + + if (conn->outstanding_requests == 0) { + SPDK_DEBUGLOG(SPDK_LOG_RPC, "all outstanding requests completed\n"); + spdk_jsonrpc_server_conn_remove(conn); + } + } + } + + /* Check listen socket */ + if (!TAILQ_EMPTY(&server->free_conns)) { + spdk_jsonrpc_server_accept(server); + } + + TAILQ_FOREACH(conn, &server->conns, link) { + if (conn->closed) { + continue; + } + + rc = spdk_jsonrpc_server_conn_send(conn); + if (rc != 0) { + spdk_jsonrpc_server_conn_close(conn); + continue; + } + + rc = spdk_jsonrpc_server_conn_recv(conn); + if (rc != 0) { + spdk_jsonrpc_server_conn_close(conn); + continue; + } + } + + return 0; +} |