diff options
Diffstat (limited to 'src/dpdk_lib18/librte_kvargs')
| -rwxr-xr-x | src/dpdk_lib18/librte_kvargs/Makefile | 51 | ||||
| -rwxr-xr-x | src/dpdk_lib18/librte_kvargs/rte_kvargs.c | 208 | ||||
| -rwxr-xr-x | src/dpdk_lib18/librte_kvargs/rte_kvargs.h | 155 |
3 files changed, 414 insertions, 0 deletions
diff --git a/src/dpdk_lib18/librte_kvargs/Makefile b/src/dpdk_lib18/librte_kvargs/Makefile new file mode 100755 index 00000000..b09359a5 --- /dev/null +++ b/src/dpdk_lib18/librte_kvargs/Makefile @@ -0,0 +1,51 @@ +# BSD LICENSE +# +# Copyright 2014 6WIND S.A. +# +# 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 6WIND S.A. 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 $(RTE_SDK)/mk/rte.vars.mk + +# library name +LIB = librte_kvargs.a + +CFLAGS += $(WERROR_FLAGS) -I$(SRCDIR) -O3 + +# all source are stored in SRCS-y +SRCS-$(CONFIG_RTE_LIBRTE_KVARGS) := rte_kvargs.c + +# install includes +INCS := rte_kvargs.h +SYMLINK-$(CONFIG_RTE_LIBRTE_KVARGS)-include := $(INCS) + +# this lib needs eal +DEPDIRS-$(CONFIG_RTE_LIBRTE_KVARGS) += lib/librte_eal + +include $(RTE_SDK)/mk/rte.lib.mk diff --git a/src/dpdk_lib18/librte_kvargs/rte_kvargs.c b/src/dpdk_lib18/librte_kvargs/rte_kvargs.c new file mode 100755 index 00000000..8bc1e461 --- /dev/null +++ b/src/dpdk_lib18/librte_kvargs/rte_kvargs.c @@ -0,0 +1,208 @@ +/*- + * BSD LICENSE + * + * Copyright(c) 2010-2013 Intel Corporation. All rights reserved. + * Copyright(c) 2014 6WIND S.A. + * 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 <string.h> +#include <stdlib.h> + +#include <rte_log.h> +#include <rte_string_fns.h> + +#include "rte_kvargs.h" + +/* + * Receive a string with a list of arguments following the pattern + * key=value;key=value;... and insert them into the list. + * strtok() is used so the params string will be copied to be modified. + */ +static int +rte_kvargs_tokenize(struct rte_kvargs *kvlist, const char *params) +{ + unsigned i; + char *str; + char *ctx1 = NULL; + char *ctx2 = NULL; + + /* Copy the const char *params to a modifiable string + * to pass to rte_strsplit + */ + kvlist->str = strdup(params); + if (kvlist->str == NULL) { + RTE_LOG(ERR, PMD, "Cannot parse arguments: not enough memory\n"); + return -1; + } + + /* browse each key/value pair and add it in kvlist */ + str = kvlist->str; + while ((str = strtok_r(str, RTE_KVARGS_PAIRS_DELIM, &ctx1)) != NULL) { + + i = kvlist->count; + if (i >= RTE_KVARGS_MAX) { + RTE_LOG(ERR, PMD, "Cannot parse arguments: list full\n"); + return -1; + } + + kvlist->pairs[i].key = strtok_r(str, RTE_KVARGS_KV_DELIM, &ctx2); + kvlist->pairs[i].value = strtok_r(NULL, RTE_KVARGS_KV_DELIM, &ctx2); + if (kvlist->pairs[i].key == NULL || kvlist->pairs[i].value == NULL) { + RTE_LOG(ERR, PMD, + "Cannot parse arguments: wrong key or value\n" + "params=<%s>\n", params); + return -1; + } + + kvlist->count++; + str = NULL; + } + + return 0; +} + +/* + * Determine whether a key is valid or not by looking + * into a list of valid keys. + */ +static int +is_valid_key(const char *valid[], const char *key_match) +{ + const char **valid_ptr; + + for (valid_ptr = valid; *valid_ptr != NULL; valid_ptr++) { + if (strcmp(key_match, *valid_ptr) == 0) + return 1; + } + return 0; +} + +/* + * Determine whether all keys are valid or not by looking + * into a list of valid keys. + */ +static int +check_for_valid_keys(struct rte_kvargs *kvlist, + const char *valid[]) +{ + unsigned i, ret; + struct rte_kvargs_pair *pair; + + for (i = 0; i < kvlist->count; i++) { + pair = &kvlist->pairs[i]; + ret = is_valid_key(valid, pair->key); + if (!ret) { + RTE_LOG(ERR, PMD, + "Error parsing device, invalid key <%s>\n", + pair->key); + return -1; + } + } + return 0; +} + +/* + * Return the number of times a given arg_name exists in the key/value list. + * E.g. given a list = { rx = 0, rx = 1, tx = 2 } the number of args for + * arg "rx" will be 2. + */ +unsigned +rte_kvargs_count(const struct rte_kvargs *kvlist, const char *key_match) +{ + const struct rte_kvargs_pair *pair; + unsigned i, ret; + + ret = 0; + for (i = 0; i < kvlist->count; i++) { + pair = &kvlist->pairs[i]; + if (key_match == NULL || strcmp(pair->key, key_match) == 0) + ret++; + } + + return ret; +} + +/* + * For each matching key, call the given handler function. + */ +int +rte_kvargs_process(const struct rte_kvargs *kvlist, + const char *key_match, + arg_handler_t handler, + void *opaque_arg) +{ + const struct rte_kvargs_pair *pair; + unsigned i; + + for (i = 0; i < kvlist->count; i++) { + pair = &kvlist->pairs[i]; + if (key_match == NULL || strcmp(pair->key, key_match) == 0) { + if ((*handler)(pair->key, pair->value, opaque_arg) < 0) + return -1; + } + } + return 0; +} + +/* free the rte_kvargs structure */ +void +rte_kvargs_free(struct rte_kvargs *kvlist) +{ + if (kvlist->str != NULL) + free(kvlist->str); + free(kvlist); +} + +/* + * Parse the arguments "key=value;key=value;..." string and return + * an allocated structure that contains a key/value list. Also + * check if only valid keys were used. + */ +struct rte_kvargs * +rte_kvargs_parse(const char *args, const char *valid_keys[]) +{ + struct rte_kvargs *kvlist; + + kvlist = malloc(sizeof(*kvlist)); + if (kvlist == NULL) + return NULL; + memset(kvlist, 0, sizeof(*kvlist)); + + if (rte_kvargs_tokenize(kvlist, args) < 0) { + rte_kvargs_free(kvlist); + return NULL; + } + + if (valid_keys != NULL && check_for_valid_keys(kvlist, valid_keys) < 0) { + rte_kvargs_free(kvlist); + return NULL; + } + + return kvlist; +} diff --git a/src/dpdk_lib18/librte_kvargs/rte_kvargs.h b/src/dpdk_lib18/librte_kvargs/rte_kvargs.h new file mode 100755 index 00000000..ef4efabf --- /dev/null +++ b/src/dpdk_lib18/librte_kvargs/rte_kvargs.h @@ -0,0 +1,155 @@ +/*- + * BSD LICENSE + * + * Copyright(c) 2010-2013 Intel Corporation. All rights reserved. + * Copyright(c) 2014 6WIND S.A. + * 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 _RTE_KVARGS_H_ +#define _RTE_KVARGS_H_ + +/** + * @file + * RTE Argument parsing + * + * This module can be used to parse arguments whose format is + * key1=value1,key2=value2,key3=value3,... + * + * The same key can appear several times with the same or a different + * value. Indeed, the arguments are stored as a list of key/values + * associations and not as a dictionary. + * + * This file provides some helpers that are especially used by virtual + * ethernet devices at initialization for arguments parsing. + */ + +#ifdef __cplusplus +extern "C" { +#endif + +/** Maximum number of key/value associations */ +#define RTE_KVARGS_MAX 32 + +/** separator character used between each pair */ +#define RTE_KVARGS_PAIRS_DELIM "," + +/** separator character used between key and value */ +#define RTE_KVARGS_KV_DELIM "=" + +/** Type of callback function used by rte_kvargs_process() */ +typedef int (*arg_handler_t)(const char *key, const char *value, void *opaque); + +/** A key/value association */ +struct rte_kvargs_pair { + char *key; /**< the name (key) of the association */ + char *value; /**< the value associated to that key */ +}; + +/** Store a list of key/value associations */ +struct rte_kvargs { + char *str; /**< copy of the argument string */ + unsigned count; /**< number of entries in the list */ + struct rte_kvargs_pair pairs[RTE_KVARGS_MAX]; /**< list of key/values */ +}; + +/** + * Allocate a rte_kvargs and store key/value associations from a string + * + * The function allocates and fills a rte_kvargs structure from a given + * string whose format is key1=value1,key2=value2,... + * + * The structure can be freed with rte_kvargs_free(). + * + * @param args + * The input string containing the key/value associations + * @param valid_keys + * A list of valid keys (table of const char *, the last must be NULL). + * This argument is ignored if NULL + * + * @return + * - A pointer to an allocated rte_kvargs structure on success + * - NULL on error + */ +struct rte_kvargs *rte_kvargs_parse(const char *args, const char *valid_keys[]); + +/** + * Free a rte_kvargs structure + * + * Free a rte_kvargs structure previously allocated with + * rte_kvargs_parse(). + * + * @param kvlist + * The rte_kvargs structure + */ +void rte_kvargs_free(struct rte_kvargs *kvlist); + +/** + * Call a handler function for each key/value matching the key + * + * For each key/value association that matches the given key, calls the + * handler function with the for a given arg_name passing the value on the + * dictionary for that key and a given extra argument. + * + * @param kvlist + * The rte_kvargs structure + * @param key_match + * The key on which the handler should be called, or NULL to process handler + * on all associations + * @param handler + * The function to call for each matching key + * @param opaque_arg + * A pointer passed unchanged to the handler + * + * @return + * - 0 on success + * - Negative on error + */ +int rte_kvargs_process(const struct rte_kvargs *kvlist, + const char *key_match, arg_handler_t handler, void *opaque_arg); + +/** + * Count the number of associations matching the given key + * + * @param kvlist + * The rte_kvargs structure + * @param key_match + * The key that should match, or NULL to count all associations + + * @return + * The number of entries + */ +unsigned rte_kvargs_count(const struct rte_kvargs *kvlist, + const char *key_match); + +#ifdef __cplusplus +} +#endif + +#endif |