ceph/src/spdk/module/bdev/split/vbdev_split_rpc.c

   1 /*-
   2  *   BSD LICENSE
   3  *
   4  *   Copyright (c) Intel Corporation.
   5  *   All rights reserved.
   6  *
   7  *   Redistribution and use in source and binary forms, with or without
   8  *   modification, are permitted provided that the following conditions
   9  *   are met:
  10  *
  11  *     * Redistributions of source code must retain the above copyright
  12  *       notice, this list of conditions and the following disclaimer.
  13  *     * Redistributions in binary form must reproduce the above copyright
  14  *       notice, this list of conditions and the following disclaimer in
  15  *       the documentation and/or other materials provided with the
  16  *       distribution.
  17  *     * Neither the name of Intel Corporation nor the names of its
  18  *       contributors may be used to endorse or promote products derived
  19  *       from this software without specific prior written permission.
  20  *
  21  *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  22  *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  23  *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  24  *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  25  *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  26  *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  27  *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  28  *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  29  *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  30  *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  31  *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  32  */
  33
  34 #include "spdk/rpc.h"
  35 #include "spdk/util.h"
  36 #include "spdk/string.h"
  37
  38 #include "vbdev_split.h"
  39 #include "spdk_internal/log.h"
  40
  41 struct rpc_construct_split {
  42         char *base_bdev;
  43         uint32_t split_count;
  44         uint64_t split_size_mb;
  45 };
  46
  47 static const struct spdk_json_object_decoder rpc_construct_split_decoders[] = {
  48         {"base_bdev", offsetof(struct rpc_construct_split, base_bdev), spdk_json_decode_string},
  49         {"split_count", offsetof(struct rpc_construct_split, split_count), spdk_json_decode_uint32},
  50         {"split_size_mb", offsetof(struct rpc_construct_split, split_size_mb), spdk_json_decode_uint64, true},
  51 };
  52
  53 static void
  54 rpc_bdev_split_create(struct spdk_jsonrpc_request *request,
  55                       const struct spdk_json_val *params)
  56 {
  57         struct rpc_construct_split req = {};
  58         struct spdk_json_write_ctx *w;
  59         struct spdk_bdev *base_bdev;
  60         int rc;
  61
  62         if (spdk_json_decode_object(params, rpc_construct_split_decoders,
  63                                     SPDK_COUNTOF(rpc_construct_split_decoders),
  64                                     &req)) {
  65                 SPDK_ERRLOG("spdk_json_decode_object failed\n");
  66                 spdk_jsonrpc_send_error_response(request, SPDK_JSONRPC_ERROR_INVALID_PARAMS, "Invalid parameters");
  67                 goto out;
  68         }
  69
  70         rc = create_vbdev_split(req.base_bdev, req.split_count, req.split_size_mb);
  71         if (rc < 0) {
  72                 spdk_jsonrpc_send_error_response_fmt(request, SPDK_JSONRPC_ERROR_INVALID_PARAMS,
  73                                                      "Failed to create %"PRIu32" split bdevs from '%s': %s",
  74                                                      req.split_count, req.base_bdev, spdk_strerror(-rc));
  75                 goto out;
  76         }
  77
  78         w = spdk_jsonrpc_begin_result(request);
  79         spdk_json_write_array_begin(w);
  80
  81         base_bdev = spdk_bdev_get_by_name(req.base_bdev);
  82         if (base_bdev != NULL) {
  83                 struct spdk_bdev_part_base *split_base;
  84                 struct bdev_part_tailq *split_base_tailq;
  85                 struct spdk_bdev_part *split_part;
  86                 struct spdk_bdev *split_bdev;
  87
  88                 split_base = vbdev_split_get_part_base(base_bdev);
  89
  90                 assert(split_base != NULL);
  91
  92                 split_base_tailq = spdk_bdev_part_base_get_tailq(split_base);
  93                 TAILQ_FOREACH(split_part, split_base_tailq, tailq) {
  94                         split_bdev = spdk_bdev_part_get_bdev(split_part);
  95                         spdk_json_write_string(w, spdk_bdev_get_name(split_bdev));
  96                 }
  97         }
  98
  99         spdk_json_write_array_end(w);
 100         spdk_jsonrpc_end_result(request, w);
 101
 102 out:
 103         free(req.base_bdev);
 104 }
 105 SPDK_RPC_REGISTER("bdev_split_create", rpc_bdev_split_create, SPDK_RPC_RUNTIME)
 106 SPDK_RPC_REGISTER_ALIAS_DEPRECATED(bdev_split_create, construct_split_vbdev)
 107
 108 struct rpc_delete_split {
 109         char *base_bdev;
 110 };
 111
 112 static const struct spdk_json_object_decoder rpc_delete_split_decoders[] = {
 113         {"base_bdev", offsetof(struct rpc_delete_split, base_bdev), spdk_json_decode_string},
 114 };
 115
 116 static void
 117 rpc_bdev_split_delete(struct spdk_jsonrpc_request *request,
 118                       const struct spdk_json_val *params)
 119 {
 120         struct rpc_delete_split req = {};
 121         struct spdk_json_write_ctx *w;
 122         int rc;
 123
 124         if (spdk_json_decode_object(params, rpc_delete_split_decoders,
 125                                     SPDK_COUNTOF(rpc_delete_split_decoders),
 126                                     &req)) {
 127                 SPDK_ERRLOG("spdk_json_decode_object failed\n");
 128                 spdk_jsonrpc_send_error_response(request, SPDK_JSONRPC_ERROR_INVALID_PARAMS, "Invalid parameters");
 129                 goto out;
 130         }
 131
 132         rc = vbdev_split_destruct(req.base_bdev);
 133         if (rc < 0) {
 134                 spdk_jsonrpc_send_error_response(request, SPDK_JSONRPC_ERROR_INVALID_PARAMS, spdk_strerror(-rc));
 135                 goto out;
 136         }
 137
 138         w = spdk_jsonrpc_begin_result(request);
 139         spdk_json_write_bool(w, true);
 140         spdk_jsonrpc_end_result(request, w);
 141 out:
 142         free(req.base_bdev);
 143 }
 144 SPDK_RPC_REGISTER("bdev_split_delete", rpc_bdev_split_delete, SPDK_RPC_RUNTIME)
 145 SPDK_RPC_REGISTER_ALIAS_DEPRECATED(bdev_split_delete, destruct_split_vbdev)