ceph/src/dpdk/examples/quota_watermark/qwctl/commands.c

   1 /*-
   2  *   BSD LICENSE
   3  *
   4  *   Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
   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 <stdio.h>
  35 #include <stdint.h>
  36 #include <string.h>
  37 #include <termios.h>
  38
  39 #include <cmdline_rdline.h>
  40 #include <cmdline_parse.h>
  41 #include <cmdline_parse_num.h>
  42 #include <cmdline_parse_string.h>
  43 #include <cmdline.h>
  44
  45 #include <rte_ring.h>
  46
  47 #include "qwctl.h"
  48 #include "../include/conf.h"
  49
  50
  51 /**
  52  * help command
  53  */
  54
  55 struct cmd_help_tokens {
  56     cmdline_fixed_string_t verb;
  57 };
  58
  59 cmdline_parse_token_string_t cmd_help_verb =
  60     TOKEN_STRING_INITIALIZER(struct cmd_help_tokens, verb, "help");
  61
  62 static void
  63 cmd_help_handler(__attribute__((unused)) void *parsed_result,
  64                 struct cmdline *cl,
  65                 __attribute__((unused)) void *data)
  66 {
  67     cmdline_printf(cl, "Available commands:\n"
  68                        "- help\n"
  69                        "- set  [ring_name|variable] <value>\n"
  70                        "- show [ring_name|variable]\n"
  71                        "\n"
  72                        "Available variables:\n"
  73                        "- low_watermark\n"
  74                        "- quota\n"
  75                        "- ring names follow the core%%u_port%%u format\n");
  76 }
  77
  78 cmdline_parse_inst_t cmd_help = {
  79     .f = cmd_help_handler,
  80     .data = NULL,
  81     .help_str = "show help",
  82     .tokens = {
  83         (void *) &cmd_help_verb,
  84         NULL,
  85     },
  86 };
  87
  88
  89 /**
  90  * set command
  91  */
  92
  93 struct cmd_set_tokens {
  94     cmdline_fixed_string_t verb;
  95     cmdline_fixed_string_t variable;
  96     uint32_t value;
  97 };
  98
  99 cmdline_parse_token_string_t cmd_set_verb =
 100     TOKEN_STRING_INITIALIZER(struct cmd_set_tokens, verb, "set");
 101
 102 cmdline_parse_token_string_t cmd_set_variable =
 103     TOKEN_STRING_INITIALIZER(struct cmd_set_tokens, variable, NULL);
 104
 105 cmdline_parse_token_num_t cmd_set_value =
 106     TOKEN_NUM_INITIALIZER(struct cmd_set_tokens, value, UINT32);
 107
 108 static void
 109 cmd_set_handler(__attribute__((unused)) void *parsed_result,
 110                 struct cmdline *cl,
 111               __attribute__((unused)) void *data)
 112 {
 113     struct cmd_set_tokens *tokens = parsed_result;
 114     struct rte_ring *ring;
 115
 116     if (!strcmp(tokens->variable, "quota")) {
 117
 118         if (tokens->value > 0 && tokens->value <= MAX_PKT_QUOTA)
 119             *quota = tokens->value;
 120         else
 121            cmdline_printf(cl, "quota must be between 1 and %u\n", MAX_PKT_QUOTA);
 122     }
 123
 124     else if (!strcmp(tokens->variable, "low_watermark")) {
 125
 126         if (tokens->value <= 100)
 127             *low_watermark = tokens->value * RING_SIZE / 100;
 128         else
 129             cmdline_printf(cl, "low_watermark must be between 0%% and 100%%\n");
 130     }
 131
 132     else {
 133
 134         ring = rte_ring_lookup(tokens->variable);
 135         if (ring == NULL)
 136             cmdline_printf(cl, "Cannot find ring \"%s\"\n", tokens->variable);
 137         else
 138             if (tokens->value >= *low_watermark * 100 / RING_SIZE
 139              && tokens->value <= 100)
 140                 rte_ring_set_water_mark(ring, tokens->value * RING_SIZE / 100);
 141             else
 142                 cmdline_printf(cl, "ring high watermark must be between %u%% "
 143                                    "and 100%%\n", *low_watermark * 100 / RING_SIZE);
 144     }
 145 }
 146
 147 cmdline_parse_inst_t cmd_set = {
 148     .f = cmd_set_handler,
 149     .data = NULL,
 150     .help_str = "Set a variable value",
 151     .tokens = {
 152         (void *) &cmd_set_verb,
 153         (void *) &cmd_set_variable,
 154         (void *) &cmd_set_value,
 155         NULL,
 156     },
 157 };
 158
 159
 160 /**
 161  * show command
 162  */
 163
 164 struct cmd_show_tokens {
 165     cmdline_fixed_string_t verb;
 166     cmdline_fixed_string_t variable;
 167 };
 168
 169 cmdline_parse_token_string_t cmd_show_verb =
 170     TOKEN_STRING_INITIALIZER(struct cmd_show_tokens, verb, "show");
 171
 172 cmdline_parse_token_string_t cmd_show_variable =
 173     TOKEN_STRING_INITIALIZER(struct cmd_show_tokens, variable, NULL);
 174
 175
 176 static void
 177 cmd_show_handler(__attribute__((unused)) void *parsed_result,
 178                 struct cmdline *cl,
 179               __attribute__((unused)) void *data)
 180 {
 181     struct cmd_show_tokens *tokens = parsed_result;
 182     struct rte_ring *ring;
 183
 184     if (!strcmp(tokens->variable, "quota"))
 185         cmdline_printf(cl, "Global quota: %d\n", *quota);
 186
 187     else if (!strcmp(tokens->variable, "low_watermark"))
 188         cmdline_printf(cl, "Global low_watermark: %u\n", *low_watermark);
 189
 190     else {
 191
 192         ring = rte_ring_lookup(tokens->variable);
 193         if (ring == NULL)
 194             cmdline_printf(cl, "Cannot find ring \"%s\"\n", tokens->variable);
 195         else
 196             rte_ring_dump(stdout, ring);
 197     }
 198 }
 199
 200 cmdline_parse_inst_t cmd_show = {
 201     .f = cmd_show_handler,
 202     .data = NULL,
 203     .help_str = "Show a variable value",
 204     .tokens = {
 205         (void *) &cmd_show_verb,
 206         (void *) &cmd_show_variable,
 207         NULL,
 208     },
 209 };
 210
 211
 212 cmdline_parse_ctx_t qwctl_ctx[] = {
 213         (cmdline_parse_inst_t *)&cmd_help,
 214         (cmdline_parse_inst_t *)&cmd_set,
 215         (cmdline_parse_inst_t *)&cmd_show,
 216         NULL,
 217 };