[dpdk-dev] [PATCH v3 4/5] log: add ability to match dynamic log based on shell pattern
Stephen Hemminger
stephen at networkplumber.org
Wed Apr 25 05:17:49 CEST 2018
Regular expressions are not the best way to match a hierarchical
pattern like dynamic log levels. And the separator for dynamic
log levels is period which is the regex wildcard character.
A better solution is to use filename matching 'globbing' so
that log levels match like file paths. For compatibility,
use colon to separate pattern match style arguments. For
example:
--log-level 'pmd.net.virtio.*:debug'
This also makes the documentation match what really happens
internally.
Signed-off-by: Stephen Hemminger <stephen at networkplumber.org>
---
doc/guides/contributing/coding_style.rst | 4 +-
doc/guides/nics/qede.rst | 2 +-
lib/librte_eal/common/eal_common_log.c | 76 +++++++++++++++++-----
lib/librte_eal/common/eal_common_options.c | 42 ++++++++----
lib/librte_eal/common/eal_private.h | 1 +
lib/librte_eal/common/include/rte_log.h | 18 ++++-
lib/librte_eal/rte_eal_version.map | 7 ++
7 files changed, 114 insertions(+), 36 deletions(-)
diff --git a/doc/guides/contributing/coding_style.rst b/doc/guides/contributing/coding_style.rst
index b0f0adb887b4..25876059bb53 100644
--- a/doc/guides/contributing/coding_style.rst
+++ b/doc/guides/contributing/coding_style.rst
@@ -614,8 +614,8 @@ In the DPDK environment, use the logging interface provided:
* is DEBUG) */
rte_log_set_level(my_logtype2, RTE_LOG_NOTICE);
- /* enable all PMD logs (whose identifier string starts with "pmd") */
- rte_log_set_level_regexp("pmd.*", RTE_LOG_DEBUG);
+ /* enable all PMD logs (whose identifier string starts with "pmd.") */
+ rte_log_set_level_pattern("pmd.*", RTE_LOG_DEBUG);
/* log in debug level */
rte_log_set_global_level(RTE_LOG_DEBUG);
diff --git a/doc/guides/nics/qede.rst b/doc/guides/nics/qede.rst
index 63ce9b4c60c6..42dd70db39df 100644
--- a/doc/guides/nics/qede.rst
+++ b/doc/guides/nics/qede.rst
@@ -193,7 +193,7 @@ This section provides instructions to configure SR-IOV with Linux OS.
#. Running testpmd
- (Supply ``--log-level="pmd.net.qede.driver",7`` to view informational messages):
+ (Supply ``--log-level="pmd.net.qede.driver:7`` to view informational messages):
Refer to the document
:ref:`compiling and testing a PMD for a NIC <pmd_build_and_test>` to run
diff --git a/lib/librte_eal/common/eal_common_log.c b/lib/librte_eal/common/eal_common_log.c
index c04bcde87853..c660ca659252 100644
--- a/lib/librte_eal/common/eal_common_log.c
+++ b/lib/librte_eal/common/eal_common_log.c
@@ -9,6 +9,7 @@
#include <string.h>
#include <errno.h>
#include <regex.h>
+#include <fnmatch.h>
#include <rte_eal.h>
#include <rte_log.h>
@@ -28,6 +29,8 @@ struct rte_eal_opt_loglevel {
TAILQ_ENTRY(rte_eal_opt_loglevel) next;
/** Compiled regular expression obtained from the option */
regex_t re_match;
+ /** Glob match string option */
+ char *pattern;
/** Log level value obtained from the option */
uint32_t level;
};
@@ -104,9 +107,9 @@ rte_log_set_level(uint32_t type, uint32_t level)
return 0;
}
-/* set level */
+/* set log level by regular expression */
int
-rte_log_set_level_regexp(const char *pattern, uint32_t level)
+rte_log_set_level_regexp(const char *regex, uint32_t level)
{
regex_t r;
size_t i;
@@ -114,7 +117,7 @@ rte_log_set_level_regexp(const char *pattern, uint32_t level)
if (level > RTE_LOG_DEBUG)
return -1;
- if (regcomp(&r, pattern, 0) != 0)
+ if (regcomp(&r, regex, 0) != 0)
return -1;
for (i = 0; i < rte_logs.dynamic_types_len; i++) {
@@ -131,24 +134,30 @@ rte_log_set_level_regexp(const char *pattern, uint32_t level)
}
/*
- * Save the type (regexp string) and the loglevel
- * in the global storage so that it could be used
- * to configure dynamic logtypes which are absent
- * at the moment of EAL option processing but may
- * be registered during runtime.
+ * Save the type string and the loglevel for later dynamic
+ * logtypes which may register later.
*/
-int rte_log_save_regexp(const char *regex, int tmp)
+static int rte_log_save_level(int priority,
+ const char *regex, const char *pattern)
{
- struct rte_eal_opt_loglevel *opt_ll;
+ struct rte_eal_opt_loglevel *opt_ll = NULL;
opt_ll = malloc(sizeof(*opt_ll));
if (opt_ll == NULL)
- return -1;
-
- if (regcomp(&opt_ll->re_match, regex, 0) != 0)
goto fail;
- opt_ll->level = tmp;
+ opt_ll->level = priority;
+
+ if (regex) {
+ opt_ll->pattern = NULL;
+ if (regcomp(&opt_ll->re_match, regex, 0) != 0)
+ goto fail;
+ } else if (pattern) {
+ opt_ll->pattern = strdup(pattern);
+ if (opt_ll->pattern == NULL)
+ goto fail;
+ } else
+ goto fail;
TAILQ_INSERT_HEAD(&opt_loglevel_list, opt_ll, next);
return 0;
@@ -157,6 +166,36 @@ int rte_log_save_regexp(const char *regex, int tmp)
return -1;
}
+int rte_log_save_regexp(const char *regex, int tmp)
+{
+ return rte_log_save_level(tmp, regex, NULL);
+}
+
+/* set log level based on glob (file match) pattern */
+int
+rte_log_set_level_pattern(const char *pattern, uint32_t level)
+{
+ size_t i;
+
+ if (level > RTE_LOG_DEBUG)
+ return -1;
+
+ for (i = 0; i < rte_logs.dynamic_types_len; i++) {
+ if (rte_logs.dynamic_types[i].name == NULL)
+ continue;
+
+ if (fnmatch(pattern, rte_logs.dynamic_types[i].name, 0))
+ rte_logs.dynamic_types[i].loglevel = level;
+ }
+
+ return 0;
+}
+
+int rte_log_save_pattern(const char *pattern, int priority)
+{
+ return rte_log_save_level(priority, NULL, pattern);
+}
+
/* get the current loglevel for the message being processed */
int rte_log_cur_msg_loglevel(void)
{
@@ -244,8 +283,13 @@ rte_log_register_type_and_pick_level(const char *name, uint32_t level_def)
if (opt_ll->level > RTE_LOG_DEBUG)
continue;
- if (regexec(&opt_ll->re_match, name, 0, NULL, 0) == 0)
- level = opt_ll->level;
+ if (opt_ll->pattern) {
+ if (fnmatch(opt_ll->pattern, name, 0))
+ level = opt_ll->level;
+ } else {
+ if (regexec(&opt_ll->re_match, name, 0, NULL, 0) == 0)
+ level = opt_ll->level;
+ }
}
rte_logs.dynamic_types[type].loglevel = level;
diff --git a/lib/librte_eal/common/eal_common_options.c b/lib/librte_eal/common/eal_common_options.c
index 522aa9ea6974..ecebb2923131 100644
--- a/lib/librte_eal/common/eal_common_options.c
+++ b/lib/librte_eal/common/eal_common_options.c
@@ -959,19 +959,23 @@ eal_parse_log_priority(const char *level)
static int
eal_parse_log_level(const char *arg)
{
- char *str, *type, *level;
+ const char *pattern = NULL;
+ const char *regex = NULL;
+ char *str, *level;
int priority;
str = strdup(arg);
if (str == NULL)
return -1;
- if (strchr(str, ',') == NULL) {
- type = NULL;
- level = str;
+ if ((level = strchr(str, ','))) {
+ regex = str;
+ *level++ = '\0';
+ } else if ((level = strchr(str, ':'))) {
+ pattern = str;
+ *level++ = '\0';
} else {
- type = strsep(&str, ",");
- level = strsep(&str, ",");
+ level = str;
}
priority = eal_parse_log_priority(level);
@@ -980,14 +984,24 @@ eal_parse_log_level(const char *arg)
goto fail;
}
- if (type == NULL) {
+ if (regex) {
+ if (rte_log_set_level_regexp(regex, priority) < 0) {
+ fprintf(stderr, "cannot set log level %s,%d\n",
+ pattern, priority);
+ goto fail;
+ }
+ if (rte_log_save_regexp(regex, priority) < 0)
+ goto fail;
+ } else if (pattern) {
+ if (rte_log_set_level_pattern(pattern, priority) < 0) {
+ fprintf(stderr, "cannot set log level %s:%d\n",
+ pattern, priority);
+ goto fail;
+ }
+ if (rte_log_save_pattern(pattern, priority) < 0)
+ goto fail;
+ } else {
rte_log_set_global_level(priority);
- } else if (rte_log_set_level_regexp(type, priority) < 0) {
- fprintf(stderr, "cannot set log level %s,%d\n",
- type, priority);
- goto fail;
- } else if (rte_log_save_regexp(type, priority) < 0) {
- goto fail;
}
free(str);
@@ -1352,7 +1366,7 @@ eal_common_usage(void)
" --"OPT_PROC_TYPE" Type of this process (primary|secondary|auto)\n"
" --"OPT_SYSLOG" Set syslog facility\n"
" --"OPT_LOG_LEVEL"=<int> Set global log level\n"
- " --"OPT_LOG_LEVEL"=<type-regexp>,<int>\n"
+ " --"OPT_LOG_LEVEL"=<type-match>:<int>\n"
" Set specific log level\n"
" -v Display version information on startup\n"
" -h, --help This help\n"
diff --git a/lib/librte_eal/common/eal_private.h b/lib/librte_eal/common/eal_private.h
index a2d2def2bac7..bdadc4d502f5 100644
--- a/lib/librte_eal/common/eal_private.h
+++ b/lib/librte_eal/common/eal_private.h
@@ -86,6 +86,7 @@ int rte_eal_log_init(const char *id, int facility);
* Save the log regexp for later
*/
int rte_log_save_regexp(const char *type, int priority);
+int rte_log_save_pattern(const char *pattern, int priority);
/**
* Init tail queues for non-EAL library structures. This is to allow
diff --git a/lib/librte_eal/common/include/rte_log.h b/lib/librte_eal/common/include/rte_log.h
index 2d817c3da7c1..2f789cb90293 100644
--- a/lib/librte_eal/common/include/rte_log.h
+++ b/lib/librte_eal/common/include/rte_log.h
@@ -130,16 +130,28 @@ uint32_t rte_log_get_global_level(void);
int rte_log_get_level(uint32_t logtype);
/**
- * Set the log level for a given type.
+ * Set the log level for a given type based on shell pattern.
*
* @param pattern
- * The regexp identifying the log type.
+ * The match pattern identifying the log type.
+ * @param level
+ * The level to be set.
+ * @return
+ * 0 on success, a negative value if level is invalid.
+ */
+int rte_log_set_level_pattern(const char *pattern, uint32_t level);
+
+/**
+ * Set the log level for a given type based on regular expression.
+ *
+ * @param regex
+ * The regular expression identifying the log type.
* @param level
* The level to be set.
* @return
* 0 on success, a negative value if level is invalid.
*/
-int rte_log_set_level_regexp(const char *pattern, uint32_t level);
+int rte_log_set_level_regexp(const char *regex, uint32_t level);
/**
* Set the log level for a given type.
diff --git a/lib/librte_eal/rte_eal_version.map b/lib/librte_eal/rte_eal_version.map
index 42540ff7a890..fa7dcd6d7e06 100644
--- a/lib/librte_eal/rte_eal_version.map
+++ b/lib/librte_eal/rte_eal_version.map
@@ -209,6 +209,13 @@ DPDK_18.02 {
} DPDK_17.11;
+DPDK_18.05 {
+ global:
+
+ rte_log_set_level_pattern;
+
+} DPDK_18_02;
+
EXPERIMENTAL {
global:
--
2.17.0
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