From 97f17497d162afdb82c8704bf097f0fee3724b2e Mon Sep 17 00:00:00 2001 From: "C.J. Collier" Date: Tue, 14 Jun 2016 07:50:17 -0700 Subject: Imported Upstream version 16.04 Change-Id: I77eadcd8538a9122e4773cbe55b24033dc451757 Signed-off-by: C.J. Collier --- lib/librte_eal/common/eal_common_log.c | 337 +++++++++++++++++++++++++++++++++ 1 file changed, 337 insertions(+) create mode 100644 lib/librte_eal/common/eal_common_log.c (limited to 'lib/librte_eal/common/eal_common_log.c') diff --git a/lib/librte_eal/common/eal_common_log.c b/lib/librte_eal/common/eal_common_log.c new file mode 100644 index 00000000..1ae8de70 --- /dev/null +++ b/lib/librte_eal/common/eal_common_log.c @@ -0,0 +1,337 @@ +/*- + * BSD LICENSE + * + * Copyright(c) 2010-2014 Intel Corporation. All rights reserved. + * 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 +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "eal_private.h" + +#define LOG_ELT_SIZE 2048 + +#define LOG_HISTORY_MP_NAME "log_history" + +STAILQ_HEAD(log_history_list, log_history); + +/** + * The structure of a message log in the log history. + */ +struct log_history { + STAILQ_ENTRY(log_history) next; + unsigned size; + char buf[0]; +}; + +static struct rte_mempool *log_history_mp = NULL; +static unsigned log_history_size = 0; +static struct log_history_list log_history; + +/* global log structure */ +struct rte_logs rte_logs = { + .type = ~0, + .level = RTE_LOG_DEBUG, + .file = NULL, +}; + +static rte_spinlock_t log_dump_lock = RTE_SPINLOCK_INITIALIZER; +static rte_spinlock_t log_list_lock = RTE_SPINLOCK_INITIALIZER; +static FILE *default_log_stream; +static int history_enabled = 1; + +/** + * This global structure stores some informations about the message + * that is currently beeing processed by one lcore + */ +struct log_cur_msg { + uint32_t loglevel; /**< log level - see rte_log.h */ + uint32_t logtype; /**< log type - see rte_log.h */ +} __rte_cache_aligned; +static struct log_cur_msg log_cur_msg[RTE_MAX_LCORE]; /**< per core log */ + + +/* default logs */ + +int +rte_log_add_in_history(const char *buf, size_t size) +{ + struct log_history *hist_buf = NULL; + static const unsigned hist_buf_size = LOG_ELT_SIZE - sizeof(*hist_buf); + void *obj; + + if (history_enabled == 0) + return 0; + + rte_spinlock_lock(&log_list_lock); + + /* get a buffer for adding in history */ + if (log_history_size > RTE_LOG_HISTORY) { + hist_buf = STAILQ_FIRST(&log_history); + if (hist_buf) { + STAILQ_REMOVE_HEAD(&log_history, next); + log_history_size--; + } + } + else { + if (rte_mempool_mc_get(log_history_mp, &obj) < 0) + obj = NULL; + hist_buf = obj; + } + + /* no buffer */ + if (hist_buf == NULL) { + rte_spinlock_unlock(&log_list_lock); + return -ENOBUFS; + } + + /* not enough room for msg, buffer go back in mempool */ + if (size >= hist_buf_size) { + rte_mempool_mp_put(log_history_mp, hist_buf); + rte_spinlock_unlock(&log_list_lock); + return -ENOBUFS; + } + + /* add in history */ + memcpy(hist_buf->buf, buf, size); + hist_buf->buf[size] = hist_buf->buf[hist_buf_size-1] = '\0'; + hist_buf->size = size; + STAILQ_INSERT_TAIL(&log_history, hist_buf, next); + log_history_size++; + rte_spinlock_unlock(&log_list_lock); + + return 0; +} + +void +rte_log_set_history(int enable) +{ + history_enabled = enable; +} + +/* Change the stream that will be used by logging system */ +int +rte_openlog_stream(FILE *f) +{ + if (f == NULL) + rte_logs.file = default_log_stream; + else + rte_logs.file = f; + return 0; +} + +/* Set global log level */ +void +rte_set_log_level(uint32_t level) +{ + rte_logs.level = (uint32_t)level; +} + +/* Get global log level */ +uint32_t +rte_get_log_level(void) +{ + return rte_logs.level; +} + +/* Set global log type */ +void +rte_set_log_type(uint32_t type, int enable) +{ + if (enable) + rte_logs.type |= type; + else + rte_logs.type &= (~type); +} + +/* Get global log type */ +uint32_t +rte_get_log_type(void) +{ + return rte_logs.type; +} + +/* get the current loglevel for the message beeing processed */ +int rte_log_cur_msg_loglevel(void) +{ + unsigned lcore_id; + lcore_id = rte_lcore_id(); + if (lcore_id >= RTE_MAX_LCORE) + return rte_get_log_level(); + return log_cur_msg[lcore_id].loglevel; +} + +/* get the current logtype for the message beeing processed */ +int rte_log_cur_msg_logtype(void) +{ + unsigned lcore_id; + lcore_id = rte_lcore_id(); + if (lcore_id >= RTE_MAX_LCORE) + return rte_get_log_type(); + return log_cur_msg[lcore_id].logtype; +} + +/* Dump log history to file */ +void +rte_log_dump_history(FILE *out) +{ + struct log_history_list tmp_log_history; + struct log_history *hist_buf; + unsigned i; + + /* only one dump at a time */ + rte_spinlock_lock(&log_dump_lock); + + /* save list, and re-init to allow logging during dump */ + rte_spinlock_lock(&log_list_lock); + tmp_log_history = log_history; + STAILQ_INIT(&log_history); + log_history_size = 0; + rte_spinlock_unlock(&log_list_lock); + + for (i=0; ibuf, hist_buf->size, 1, out) == 0) { + rte_mempool_mp_put(log_history_mp, hist_buf); + break; + } + + /* put back message structure in pool */ + rte_mempool_mp_put(log_history_mp, hist_buf); + } + fflush(out); + + rte_spinlock_unlock(&log_dump_lock); +} + +/* + * Generates a log message The message will be sent in the stream + * defined by the previous call to rte_openlog_stream(). + */ +int +rte_vlog(uint32_t level, uint32_t logtype, const char *format, va_list ap) +{ + int ret; + FILE *f = rte_logs.file; + unsigned lcore_id; + + if ((level > rte_logs.level) || !(logtype & rte_logs.type)) + return 0; + + /* save loglevel and logtype in a global per-lcore variable */ + lcore_id = rte_lcore_id(); + if (lcore_id < RTE_MAX_LCORE) { + log_cur_msg[lcore_id].loglevel = level; + log_cur_msg[lcore_id].logtype = logtype; + } + + ret = vfprintf(f, format, ap); + fflush(f); + return ret; +} + +/* + * Generates a log message The message will be sent in the stream + * defined by the previous call to rte_openlog_stream(). + * No need to check level here, done by rte_vlog(). + */ +int +rte_log(uint32_t level, uint32_t logtype, const char *format, ...) +{ + va_list ap; + int ret; + + va_start(ap, format); + ret = rte_vlog(level, logtype, format, ap); + va_end(ap); + return ret; +} + +/* + * called by environment-specific log init function to initialize log + * history + */ +int +rte_eal_common_log_init(FILE *default_log) +{ + STAILQ_INIT(&log_history); + + /* reserve RTE_LOG_HISTORY*2 elements, so we can dump and + * keep logging during this time */ + log_history_mp = rte_mempool_create(LOG_HISTORY_MP_NAME, RTE_LOG_HISTORY*2, + LOG_ELT_SIZE, 0, 0, + NULL, NULL, + NULL, NULL, + SOCKET_ID_ANY, 0); + + if ((log_history_mp == NULL) && + ((log_history_mp = rte_mempool_lookup(LOG_HISTORY_MP_NAME)) == NULL)){ + RTE_LOG(ERR, EAL, "%s(): cannot create log_history mempool\n", + __func__); + return -1; + } + + default_log_stream = default_log; + rte_openlog_stream(default_log); + return 0; +} -- cgit 1.2.3-korg