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base/SOURCES/libcgroup-0.41-loading-conf...

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From 7b1b0409f5fc1828f0feb2086fe5b8184f7eb2c6 Mon Sep 17 00:00:00 2001
From: Jan Chaloupka <jchaloup@redhat.com>
Date: Sat, 20 Sep 2014 20:02:13 +0200
Subject: [PATCH] loading configuration files from /etc/cgconfig.d/ directory
---
Makefile.in | 2 +-
doc/man/cgconfig.conf.5 | 7 +-
doc/man/cgrulesengd.8 | 8 +-
include/libcgroup/config.h | 21 ++++++
src/config.c | 181 +++++++++++++++++++++++++++++++++++++++++++--
src/daemon/Makefile.am | 4 +-
src/daemon/Makefile.in | 25 ++++++-
src/daemon/cgrulesengd.c | 51 +++++++++++--
src/libcgroup-internal.h | 3 +
src/libcgroup.map | 5 ++
src/tools/tools-common.h | 2 +-
11 files changed, 286 insertions(+), 23 deletions(-)
diff --git a/Makefile.in b/Makefile.in
index af6e89c..0349c93 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -84,7 +84,7 @@ DIST_COMMON = $(srcdir)/Makefile.in $(srcdir)/Makefile.am \
$(srcdir)/config.h.in $(top_srcdir)/scripts/init.d/cgconfig.in \
$(top_srcdir)/scripts/init.d/cgred.in \
$(srcdir)/libcgroup.pc.in COPYING INSTALL README config.guess \
- config.sub install-sh missing ltmain.sh
+ config.sub depcomp install-sh missing ylwrap ltmain.sh
ACLOCAL_M4 = $(top_srcdir)/aclocal.m4
am__aclocal_m4_deps = $(top_srcdir)/configure.in
am__configure_deps = $(am__aclocal_m4_deps) $(CONFIGURE_DEPENDENCIES) \
diff --git a/doc/man/cgconfig.conf.5 b/doc/man/cgconfig.conf.5
index be80e4e..a7d9935 100644
--- a/doc/man/cgconfig.conf.5
+++ b/doc/man/cgconfig.conf.5
@@ -251,6 +251,9 @@ Templates does not use
.B default
section settings.
+.I /etc/cgconfig.d/
+directory can be used for additional configuration files. cgrulesengd searches this directory for additional templates.
+
.\"********************************************"
.SH EXAMPLES
.LP
@@ -783,10 +786,12 @@ related to them.
.SH FILES
.LP
.PD .1v
-.TP 20
+.TP
.B /etc/cgconfig.conf
.TP
default libcgroup configuration file
+.B /etc/cgconfig.d/
+default libcgroup configuration files directory
.PD
.SH SEE ALSO
diff --git a/doc/man/cgrulesengd.8 b/doc/man/cgrulesengd.8
index 2e89c5b..749b6fc 100644
--- a/doc/man/cgrulesengd.8
+++ b/doc/man/cgrulesengd.8
@@ -65,10 +65,16 @@ controls verbosity of the tool. Allowed values are \fBDEBUG\fR,
.SH FILES
.LP
.PD .1v
-.TP 20
+.TP
.B /etc/cgrules.conf
.TP
the default libcgroup configuration file
+.TP
+.B /etc/cgconfig.conf
+the default templates file
+.TP
+.B /etc/cgconfig.d/
+the default templates directory
.SH SEE ALSO
cgrules.conf (5)
diff --git a/include/libcgroup/config.h b/include/libcgroup/config.h
index 43568e1..9aaa390 100644
--- a/include/libcgroup/config.h
+++ b/include/libcgroup/config.h
@@ -84,11 +84,32 @@ int cgroup_init_templates_cache(char *pathname);
int cgroup_reload_cached_templates(char *pathname);
/**
+ * Load the templates cache from files. Before calling this function,
+ * cgroup_templates_cache_set_source_files has to be called first.
+ * @param file_index index of file which was unable to be parsed
+ * @return 0 on success, > 0 on error
+ */
+int cgroup_load_templates_cache_from_files(int *file_index);
+
+/**
+ * Setting source files of templates. This function has to be called before
+ * any call of cgroup_load_templates_cache_from_files.
+ * @param tmpl_files
+ */
+struct cgroup_string_list;
+void cgroup_templates_cache_set_source_files(
+ struct cgroup_string_list *tmpl_files);
+
+/**
* Physically create a new control group in kernel, based on given control
* group template and configuration file. If given template is not set in
* configuration file, then the procedure works create the control group
* using cgroup_create_cgroup() function
*
+ * Templates are loaded using cgroup_load_templates_cache_from_files
+ * function, which must be preceded by cgroup_templates_cache_set_source_files
+ * call.
+ *
* The flags can alter the behavior of this function:
* CGFLAG_USE_TEMPLATE_CACHE: Use cached templates instead of
* parsing the config file
diff --git a/src/config.c b/src/config.c
index e1ee0a8..1c5fc14 100644
--- a/src/config.c
+++ b/src/config.c
@@ -41,6 +41,8 @@
#include <sys/stat.h>
#include <sys/types.h>
+#include "tools/tools-common.h"
+
unsigned int MAX_CGROUPS = 64; /* NOTE: This value changes dynamically */
unsigned int MAX_TEMPLATES = 64;
/* NOTE: This value changes dynamically */
@@ -89,6 +91,7 @@ static int config_template_table_index;
*/
static struct cgroup *template_table;
static int template_table_index;
+static struct cgroup_string_list *template_files;
/*
@@ -1572,6 +1575,161 @@ int cgroup_init_templates_cache(char *pathname)
}
+/**
+ * Setting source files of templates. This function has to be called before
+ * any call of cgroup_load_templates_cache_from_files.
+ * @param tmpl_files
+ */
+void cgroup_templates_cache_set_source_files(
+ struct cgroup_string_list *tmpl_files)
+{
+ template_files = tmpl_files;
+}
+
+/**
+ * Appending cgroup templates parsed by parser to template_table
+ * @param offset number of templates already in the table
+ */
+int cgroup_add_cgroup_templates(int offset)
+{
+ int i, ti, ret;
+
+ for (i = 0; i < config_template_table_index; i++) {
+ ti = i + offset;
+ ret = cgroup_copy_cgroup(&template_table[ti],
+ &config_template_table[i]);
+ if (ret)
+ return ret;
+
+ strcpy((template_table[ti]).name,
+ (config_template_table[i]).name);
+ template_table[ti].tasks_uid =
+ config_template_table[i].tasks_uid;
+ template_table[ti].tasks_gid =
+ config_template_table[i].tasks_gid;
+ template_table[ti].task_fperm =
+ config_template_table[i].task_fperm;
+ template_table[ti].control_uid =
+ config_template_table[i].control_uid;
+ template_table[ti].control_gid =
+ config_template_table[i].control_gid;
+ template_table[ti].control_fperm =
+ config_template_table[i].control_fperm;
+ template_table[ti].control_dperm =
+ config_template_table[i].control_dperm;
+ }
+
+ return 0;
+}
+
+/**
+ * Expand template table based on new number of parsed templates, i.e.
+ * on value of config_template_table_index.
+ * Change value of template_table_index.
+ * @return 0 on success, < 0 on error
+ */
+int cgroup_expand_template_table(void)
+{
+ int i;
+
+ template_table = realloc(template_table,
+ (template_table_index + config_template_table_index)
+ *sizeof(struct cgroup));
+
+ if (template_table == NULL)
+ return -ECGOTHER;
+
+ for (i = 0; i < config_template_table_index; i++)
+ template_table[i + template_table_index].index = 0;
+
+ template_table_index += config_template_table_index;
+
+ return 0;
+}
+
+/**
+ * Load the templates cache from files. Before calling this function,
+ * cgroup_templates_cache_set_source_files has to be called first.
+ * @param file_index index of file which was unable to be parsed
+ * @return 0 on success, > 0 on error
+ */
+int cgroup_load_templates_cache_from_files(int *file_index)
+{
+ int ret;
+ int i, j;
+ int template_table_last_index;
+ char *pathname;
+
+ if (!template_files) {
+ /* source files has not been set */
+ cgroup_dbg("Template source files have not been set. ");
+ cgroup_dbg("Using only %s\n", CGCONFIG_CONF_FILE);
+
+ if (template_table_index == 0)
+ /* the rules cache is empty */
+ return cgroup_init_templates_cache(
+ CGCONFIG_CONF_FILE);
+ else
+ /* cache is not empty */
+ return cgroup_reload_cached_templates(
+ CGCONFIG_CONF_FILE);
+ }
+
+ if (template_table) {
+ /* template structures have to be free */
+ for (i = 0; i < template_table_index; i++)
+ cgroup_free_controllers(&template_table[i]);
+ free(template_table);
+ template_table = NULL;
+ }
+ template_table_index = 0;
+
+ if ((config_template_table_index != 0) || (config_table_index != 0)) {
+ /* config structures have to be clean before parsing */
+ cgroup_free_config();
+ }
+
+ for (j = 0; j < template_files->count; j++) {
+ pathname = template_files->items[j];
+
+ cgroup_dbg("Parsing templates from %s.\n", pathname);
+ /* Attempt to read the configuration file
+ * and cache the rules. */
+ ret = cgroup_parse_config(pathname);
+ if (ret) {
+ cgroup_dbg("Could not initialize rule cache, ");
+ cgroup_dbg("error was: %d\n", ret);
+ *file_index = j;
+ return ret;
+ }
+
+ if (config_template_table_index > 0) {
+ template_table_last_index = template_table_index;
+ ret = cgroup_expand_template_table();
+ if (ret) {
+ cgroup_dbg("Could not expand template table, ");
+ cgroup_dbg("error was: %d\n", -ret);
+ *file_index = j;
+ return -ret;
+ }
+
+ /* copy template data to templates cache structures */
+ cgroup_dbg("Copying templates to template table ");
+ cgroup_dbg("from %s.\n", pathname);
+ ret = cgroup_add_cgroup_templates(
+ template_table_last_index);
+ if (ret) {
+ cgroup_dbg("Unable to copy cgroup\n");
+ *file_index = j;
+ return ret;
+ }
+ cgroup_dbg("Templates to template table copied\n");
+ }
+ }
+
+ return 0;
+}
+
/*
* Create a given cgroup, based on template configuration if it is present
* if the template is not present cgroup is creted using cgroup_create_cgroup
@@ -1593,13 +1751,22 @@ int cgroup_config_create_template_group(struct cgroup *cgroup,
* use CGCONFIG_CONF_FILE by default
*/
if (!(flags & CGFLAG_USE_TEMPLATE_CACHE)) {
- if (template_table_index == 0)
- /* the rules cache is empty */
- ret = cgroup_init_templates_cache(CGCONFIG_CONF_FILE);
- else
- /* cache is not empty */
- ret = cgroup_reload_cached_templates(
- CGCONFIG_CONF_FILE);
+ int fileindex;
+
+ /* the rules cache is empty */
+ ret = cgroup_load_templates_cache_from_files(
+ &fileindex);
+ if (ret != 0) {
+ if (fileindex < 0) {
+ cgroup_dbg("Error: Template source files ");
+ cgroup_dbg("have not been set\n");
+ } else {
+ cgroup_dbg("Error: Failed to load template");
+ cgroup_dbg("rules from %s. ",
+ template_files->items[fileindex]);
+ }
+ }
+
if (ret != 0) {
cgroup_dbg("Failed initialize templates cache.\n");
return ret;
diff --git a/src/daemon/Makefile.am b/src/daemon/Makefile.am
index f3100ed..abbbe30 100644
--- a/src/daemon/Makefile.am
+++ b/src/daemon/Makefile.am
@@ -1,9 +1,9 @@
-INCLUDES = -I $(top_srcdir)/include
+INCLUDES = -I$(top_srcdir)/src -I$(top_srcdir)/include
if WITH_DAEMON
sbin_PROGRAMS = cgrulesengd
-cgrulesengd_SOURCES = cgrulesengd.c cgrulesengd.h
+cgrulesengd_SOURCES = cgrulesengd.c cgrulesengd.h ../tools/tools-common.h ../tools/tools-common.c
cgrulesengd_LDADD = $(top_builddir)/src/.libs/libcgroup.la -lrt
cgrulesengd_LDFLAGS = -L$(top_builddir)/src/.libs
diff --git a/src/daemon/Makefile.in b/src/daemon/Makefile.in
index 76f7e07..f3efc65 100644
--- a/src/daemon/Makefile.in
+++ b/src/daemon/Makefile.in
@@ -92,8 +92,10 @@ CONFIG_CLEAN_FILES =
CONFIG_CLEAN_VPATH_FILES =
am__installdirs = "$(DESTDIR)$(sbindir)"
PROGRAMS = $(sbin_PROGRAMS)
-am__cgrulesengd_SOURCES_DIST = cgrulesengd.c cgrulesengd.h
-@WITH_DAEMON_TRUE@am_cgrulesengd_OBJECTS = cgrulesengd.$(OBJEXT)
+am__cgrulesengd_SOURCES_DIST = cgrulesengd.c cgrulesengd.h \
+ ../tools/tools-common.h ../tools/tools-common.c
+@WITH_DAEMON_TRUE@am_cgrulesengd_OBJECTS = cgrulesengd.$(OBJEXT) \
+@WITH_DAEMON_TRUE@ tools-common.$(OBJEXT)
cgrulesengd_OBJECTS = $(am_cgrulesengd_OBJECTS)
@WITH_DAEMON_TRUE@cgrulesengd_DEPENDENCIES = \
@WITH_DAEMON_TRUE@ $(top_builddir)/src/.libs/libcgroup.la
@@ -294,8 +296,8 @@ target_alias = @target_alias@
top_build_prefix = @top_build_prefix@
top_builddir = @top_builddir@
top_srcdir = @top_srcdir@
-INCLUDES = -I $(top_srcdir)/include
-@WITH_DAEMON_TRUE@cgrulesengd_SOURCES = cgrulesengd.c cgrulesengd.h
+INCLUDES = -I$(top_srcdir)/src -I$(top_srcdir)/include
+@WITH_DAEMON_TRUE@cgrulesengd_SOURCES = cgrulesengd.c cgrulesengd.h ../tools/tools-common.h ../tools/tools-common.c
@WITH_DAEMON_TRUE@cgrulesengd_LDADD = $(top_builddir)/src/.libs/libcgroup.la -lrt
@WITH_DAEMON_TRUE@cgrulesengd_LDFLAGS = -L$(top_builddir)/src/.libs
all: all-am
@@ -393,6 +395,7 @@ distclean-compile:
-rm -f *.tab.c
@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/cgrulesengd.Po@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/tools-common.Po@am__quote@
.c.o:
@am__fastdepCC_TRUE@ $(AM_V_CC)$(COMPILE) -MT $@ -MD -MP -MF $(DEPDIR)/$*.Tpo -c -o $@ $<
@@ -415,6 +418,20 @@ distclean-compile:
@AMDEP_TRUE@@am__fastdepCC_FALSE@ DEPDIR=$(DEPDIR) $(CCDEPMODE) $(depcomp) @AMDEPBACKSLASH@
@am__fastdepCC_FALSE@ $(AM_V_CC@am__nodep@)$(LTCOMPILE) -c -o $@ $<
+tools-common.o: ../tools/tools-common.c
+@am__fastdepCC_TRUE@ $(AM_V_CC)$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) -MT tools-common.o -MD -MP -MF $(DEPDIR)/tools-common.Tpo -c -o tools-common.o `test -f '../tools/tools-common.c' || echo '$(srcdir)/'`../tools/tools-common.c
+@am__fastdepCC_TRUE@ $(AM_V_at)$(am__mv) $(DEPDIR)/tools-common.Tpo $(DEPDIR)/tools-common.Po
+@AMDEP_TRUE@@am__fastdepCC_FALSE@ $(AM_V_CC)source='../tools/tools-common.c' object='tools-common.o' libtool=no @AMDEPBACKSLASH@
+@AMDEP_TRUE@@am__fastdepCC_FALSE@ DEPDIR=$(DEPDIR) $(CCDEPMODE) $(depcomp) @AMDEPBACKSLASH@
+@am__fastdepCC_FALSE@ $(AM_V_CC@am__nodep@)$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) -c -o tools-common.o `test -f '../tools/tools-common.c' || echo '$(srcdir)/'`../tools/tools-common.c
+
+tools-common.obj: ../tools/tools-common.c
+@am__fastdepCC_TRUE@ $(AM_V_CC)$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) -MT tools-common.obj -MD -MP -MF $(DEPDIR)/tools-common.Tpo -c -o tools-common.obj `if test -f '../tools/tools-common.c'; then $(CYGPATH_W) '../tools/tools-common.c'; else $(CYGPATH_W) '$(srcdir)/../tools/tools-common.c'; fi`
+@am__fastdepCC_TRUE@ $(AM_V_at)$(am__mv) $(DEPDIR)/tools-common.Tpo $(DEPDIR)/tools-common.Po
+@AMDEP_TRUE@@am__fastdepCC_FALSE@ $(AM_V_CC)source='../tools/tools-common.c' object='tools-common.obj' libtool=no @AMDEPBACKSLASH@
+@AMDEP_TRUE@@am__fastdepCC_FALSE@ DEPDIR=$(DEPDIR) $(CCDEPMODE) $(depcomp) @AMDEPBACKSLASH@
+@am__fastdepCC_FALSE@ $(AM_V_CC@am__nodep@)$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) -c -o tools-common.obj `if test -f '../tools/tools-common.c'; then $(CYGPATH_W) '../tools/tools-common.c'; else $(CYGPATH_W) '$(srcdir)/../tools/tools-common.c'; fi`
+
mostlyclean-libtool:
-rm -f *.lo
diff --git a/src/daemon/cgrulesengd.c b/src/daemon/cgrulesengd.c
index 170837a..d959eff 100644
--- a/src/daemon/cgrulesengd.c
+++ b/src/daemon/cgrulesengd.c
@@ -34,6 +34,7 @@
#include "libcgroup.h"
#include "cgrulesengd.h"
#include "../libcgroup-internal.h"
+#include "../tools/tools-common.h"
#include <errno.h>
#include <stdarg.h>
@@ -59,6 +60,9 @@
#define NUM_PER_REALLOCATIOM (100)
+/* list of config files from CGCONFIG_CONF_FILE and CGCONFIG_CONF_DIR */
+static struct cgroup_string_list template_files;
+
/* Log file, NULL if logging to file is disabled */
FILE* logfile;
@@ -936,6 +940,8 @@ void cgre_flash_rules(int signum)
/* Current time */
time_t tm = time(0);
+ int fileindex;
+
flog(LOG_INFO, "Reloading rules configuration\n");
flog(LOG_DEBUG, "Current time: %s\n", ctime(&tm));
@@ -949,7 +955,7 @@ void cgre_flash_rules(int signum)
}
/* Ask libcgroup to reload the template rules table. */
- cgroup_reload_cached_templates(CGCONFIG_CONF_FILE);
+ cgroup_load_templates_cache_from_files(&fileindex);
}
/**
@@ -962,11 +968,13 @@ void cgre_flash_templates(int signum)
/* Current time */
time_t tm = time(0);
+ int fileindex;
+
flog(LOG_INFO, "Reloading templates configuration.\n");
flog(LOG_DEBUG, "Current time: %s\n", ctime(&tm));
/* Ask libcgroup to reload the templates table. */
- cgroup_reload_cached_templates(CGCONFIG_CONF_FILE);
+ cgroup_load_templates_cache_from_files(&fileindex);
}
/**
@@ -1069,6 +1077,8 @@ int main(int argc, char *argv[])
{NULL, 0, NULL, 0}
};
+ int fileindex;
+
/* Make sure the user is root. */
if (getuid() != 0) {
fprintf(stderr, "Error: Only root can start/stop the control"
@@ -1180,6 +1190,25 @@ int main(int argc, char *argv[])
}
/* Ask libcgroup to load the configuration rules. */
+ ret = cgroup_string_list_init(&template_files,
+ CGCONFIG_CONF_FILES_LIST_MINIMUM_SIZE);
+ if (ret) {
+ fprintf(stderr, "%s: cannot init file list, out of memory?\n",
+ argv[0]);
+ goto finished_without_temp_files;
+ }
+ /* first add CGCONFIG_CONF_FILE into file list */
+ ret = cgroup_string_list_add_item(&template_files, CGCONFIG_CONF_FILE);
+ if (ret) {
+ fprintf(stderr, "%s: cannot add file to list, out of memory?\n"
+ , argv[0]);
+ goto finished;
+ }
+
+ /* then read CGCONFIG_CONF_DIR directory for additional config files */
+ cgroup_string_list_add_directory(&template_files, CGCONFIG_CONF_DIR,
+ argv[0]);
+
if ((ret = cgroup_init_rules_cache()) != 0) {
fprintf(stderr, "Error: libcgroup failed to initialize rules"
"cache from %s. %s\n", CGRULES_CONF_FILE,
@@ -1188,11 +1217,18 @@ int main(int argc, char *argv[])
}
/* ask libcgroup to load template rules as well */
- ret = cgroup_init_templates_cache(CGCONFIG_CONF_FILE);
+ cgroup_templates_cache_set_source_files(&template_files);
+ ret = cgroup_load_templates_cache_from_files(&fileindex);
if (ret != 0) {
- fprintf(stderr, "Error: libcgroup failed to initialize teplate"\
- "rules from %s. %s\n", CGCONFIG_CONF_FILE,
- cgroup_strerror(ret));
+ if (fileindex < 0) {
+ fprintf(stderr, "Error: Template source files ");
+ fprintf(stderr, "have not been set\n");
+ } else {
+ fprintf(stderr, "Error: Failed to initialize template");
+ fprintf(stderr, "rules from %s. ",
+ template_files.items[fileindex]);
+ fprintf(stderr, "%s\n", cgroup_strerror(-ret));
+ }
goto finished;
}
@@ -1259,6 +1295,9 @@ int main(int argc, char *argv[])
ret = cgre_create_netlink_socket_process_msg();
finished:
+ cgroup_string_list_free(&template_files);
+
+finished_without_temp_files:
if (logfile && logfile != stdout)
fclose(logfile);
diff --git a/src/libcgroup-internal.h b/src/libcgroup-internal.h
index 4c0f46c..c128788 100644
--- a/src/libcgroup-internal.h
+++ b/src/libcgroup-internal.h
@@ -48,6 +48,9 @@ __BEGIN_DECLS
#define CGCONFIG_CONF_FILE "/etc/cgconfig.conf"
+/* Minimum number of file in template file list for cgrulesengd */
+#define CGCONFIG_CONF_FILES_LIST_MINIMUM_SIZE 4
+#define CGCONFIG_CONF_DIR "/etc/cgconfig.d"
#define CGRULES_CONF_FILE "/etc/cgrules.conf"
#define CGRULES_MAX_FIELDS_PER_LINE 3
diff --git a/src/libcgroup.map b/src/libcgroup.map
index b0c162c..f8b0fb9 100644
--- a/src/libcgroup.map
+++ b/src/libcgroup.map
@@ -117,3 +117,8 @@ CGROUP_0.39 {
cgroup_log;
cgroup_parse_log_level_str;
} CGROUP_0.38;
+
+CGROUP_0.40 {
+ cgroup_templates_cache_set_source_files;
+ cgroup_load_templates_cache_from_files;
+} CGROUP_0.39;
diff --git a/src/tools/tools-common.h b/src/tools/tools-common.h
index e05465f..c723eb4 100644
--- a/src/tools/tools-common.h
+++ b/src/tools/tools-common.h
@@ -20,7 +20,7 @@
#include "config.h"
#include <libcgroup.h>
-#include <libcgroup-internal.h>
+#include "../libcgroup-internal.h"
#define cgroup_err(x...) cgroup_log(CGROUP_LOG_ERROR, x)
#define cgroup_warn(x...) cgroup_log(CGROUP_LOG_WARNING, x)
--
1.9.3