[OpenWrt-Devel] [PATCH ubox] Use different loglevels

Stam, Michel [FINT] M.Stam at fugro.nl
Thu Oct 2 10:24:26 EDT 2014


Hey Karl,

I agree that verbose in the macro would be an option, although by then
you're re-implementing the syslog priorities in macros.

Also, currently the verbose argument is only used in deps_available( ),
which would mean implementing the verbose parameter throughout the
kmodloader.c source. As said, not the most difficult to do, but what
would it gain?

Let me know.

Regards,

Michel Stam

-----Original Message-----
From: openwrt-devel [mailto:openwrt-devel-bounces at lists.openwrt.org] On
Behalf Of Karl P
Sent: Thursday, October 02, 2014 16:03 PM
To: openwrt-devel at lists.openwrt.org
Subject: Re: [OpenWrt-Devel] [PATCH ubox] Use different loglevels

Just one minor inline,

Cheers,
Karl P


On 10/02/2014 12:42 PM, Michel Stam wrote:
> Ubox logs various messages during OpenWRT boot which are not very 
> interesting, such as the number of iterations made. This fix 
> implements several loglevels for debug/info/error so that more useful 
> messages are shown.
>
> Signed-off-by: Michel Stam <m.stam at fugro.nl>
> ---
>   kmodloader.c | 75
+++++++++++++++++++++++++++++++++---------------------------
>   1 file changed, 41 insertions(+), 34 deletions(-)
>
> diff --git a/kmodloader.c b/kmodloader.c index 633570f..04d7c1d 100644
> --- a/kmodloader.c
> +++ b/kmodloader.c
> @@ -38,10 +38,17 @@
>
>   #define DEF_MOD_PATH "/lib/modules/%s/"
>
> -#define LOG(fmt, ...) do { \
> +#define INFO(fmt, ...) do { \
>   	syslog(LOG_INFO, fmt, ## __VA_ARGS__); \
>   	printf("kmod: "fmt, ## __VA_ARGS__); \
>   	} while (0)
> +#define ERROR(fmt, ...) do { \
> +	syslog(LOG_ERR, fmt, ## __VA_ARGS__); \
> +	fprintf(stderr,"kmod: "fmt, ## __VA_ARGS__); \
> +	} while (0)
> +#define DEBUG(fmt, ...) do { \
> +	syslog(LOG_DEBUG, fmt, ## __VA_ARGS__); \
> +	} while (0)
>
>
>   enum {
> @@ -165,7 +172,7 @@ static int elf_find_section(char *map, const char
*section, unsigned int *offset
>   	else if (clazz == ELFCLASS64)
>   		return elf64_find_section(map, section, offset, size);
>
> -	LOG("unknown elf format %d\n", clazz);
> +	ERROR("unknown elf format %d\n", clazz);
>
>   	return -1;
>   }
> @@ -208,7 +215,7 @@ static int scan_loaded_modules(void)
>
>   	fp = fopen("/proc/modules", "r");
>   	if (!fp) {
> -		LOG("failed to open /proc/modules\n");
> +		ERROR("failed to open /proc/modules\n");
>   		return -1;
>   	}
>
> @@ -243,23 +250,23 @@ static struct module* get_module_info(const char
*module, const char *name)
>   	struct stat s;
>
>   	if (!fd) {
> -		LOG("failed to open %s\n", module);
> +		ERROR("failed to open %s\n", module);
>   		return NULL;
>   	}
>
>   	if (fstat(fd, &s) == -1) {
> -		LOG("failed to stat %s\n", module);
> +		ERROR("failed to stat %s\n", module);
>   		return NULL;
>   	}
>
>   	map = mmap(NULL, s.st_size, PROT_READ, MAP_PRIVATE, fd, 0);
>   	if (map == MAP_FAILED) {
> -		LOG("failed to mmap %s\n", module);
> +		ERROR("failed to mmap %s\n", module);
>   		return NULL;
>   	}
>
>   	if (elf_find_section(map, ".modinfo", &offset, &size)) {
> -		LOG("failed to load the .modinfo section from %s\n",
module);
> +		ERROR("failed to load the .modinfo section from %s\n",
module);
>   		return NULL;
>   	}
>
> @@ -329,23 +336,23 @@ static int print_modinfo(char *module)
>   	char *map, *strings;
>
>   	if (!fd) {
> -		LOG("failed to open %s\n", module);
> +		ERROR("failed to open %s\n", module);
>   		return -1;
>   	}
>
>   	if (fstat(fd, &s) == -1) {
> -		LOG("failed to stat %s\n", module);
> +		ERROR("failed to stat %s\n", module);
>   		return -1;
>   	}
>
>   	map = mmap(NULL, s.st_size, PROT_READ, MAP_PRIVATE, fd, 0);
>   	if (map == MAP_FAILED) {
> -		LOG("failed to mmap %s\n", module);
> +		ERROR("failed to mmap %s\n", module);
>   		return -1;
>   	}
>
>   	if (elf_find_section(map, ".modinfo", &offset, &size)) {
> -		LOG("failed to load the .modinfo section from %s\n",
module);
> +		ERROR("failed to load the .modinfo section from %s\n",
module);
>   		return -1;
>   	}
>
> @@ -390,9 +397,9 @@ static int deps_available(struct module *m, int
verbose)
>   		m = find_module(dep);
>
>   		if (verbose && !m)
> -			LOG("missing dependency %s\n", dep);
> +			ERROR("missing dependency %s\n", dep);
>   		if (verbose && m && (m->state != LOADED))
> -			LOG("dependency not loaded %s\n", dep);
> +			ERROR("dependency not loaded %s\n", dep);
>   		if (!m || (m->state != LOADED))
>   			err++;

Would it make sense to maybe move the verbose checks into the log levels
themselves?


>   		dep += strlen(dep) + 1;
> @@ -408,13 +415,13 @@ static int insert_module(char *path, const char
*options)
>   	int fd, ret = -1;
>
>   	if (stat(path, &s)) {
> -		LOG("missing module %s\n", path);
> +		ERROR("missing module %s\n", path);
>   		return ret;
>   	}
>
>   	fd = open(path, O_RDONLY);
>   	if (!fd) {
> -		LOG("cannot open %s\n", path);
> +		ERROR("cannot open %s\n", path);
>   		return ret;
>   	}
>
> @@ -422,7 +429,7 @@ static int insert_module(char *path, const char
*options)
>   	if (read(fd, data, s.st_size) == s.st_size)
>   		ret = syscall(__NR_init_module, data, (unsigned long)
s.st_size, options);
>   	else
> -		LOG("failed to read full module %s\n", path);
> +		ERROR("failed to read full module %s\n", path);
>
>   	close(fd);
>   	free(data);
> @@ -444,7 +451,7 @@ static void load_moddeps(struct module *_m)
>   		m = find_module(dep);
>
>   		if (!m)
> -			LOG("failed to find dependency %s\n", dep);
> +			ERROR("failed to find dependency %s\n", dep);
>   		if (m && (m->state != LOADED)) {
>   			m->state = PROBE;
>   			load_moddeps(m);
> @@ -489,14 +496,14 @@ static int load_modprobe(void)
>
>   static int print_insmod_usage(void)
>   {
> -	LOG("Usage:\n\tinsmod filename [args]\n");
> +	INFO("Usage:\n\tinsmod filename [args]\n");
>
>   	return -1;
>   }
>
>   static int print_usage(char *arg)
>   {
> -	LOG("Usage:\n\t%s module\n", arg);
> +	INFO("Usage:\n\t%s module\n", arg);
>
>   	return -1;
>   }
> @@ -511,7 +518,7 @@ static int main_insmod(int argc, char **argv)
>
>   	name = get_module_name(argv[1]);
>   	if (!name) {
> -		LOG("cannot find module - %s\n", argv[1]);
> +		ERROR("cannot find module - %s\n", argv[1]);
>   		return -1;
>   	}
>
> @@ -519,7 +526,7 @@ static int main_insmod(int argc, char **argv)
>   		return -1;
>
>   	if (find_module(name)) {
> -		LOG("module is already loaded - %s\n", name);
> +		ERROR("module is already loaded - %s\n", name);
>   		return -1;
>
>   	}
> @@ -551,7 +558,7 @@ static int main_insmod(int argc, char **argv)
>   	free(options);
>
>   	if (ret)
> -		LOG("failed to insert %s\n", get_module_path(name));
> +		ERROR("failed to insert %s\n", get_module_path(name));
>
>   	return ret;
>   }
> @@ -571,13 +578,13 @@ static int main_rmmod(int argc, char **argv)
>   	name = get_module_name(argv[1]);
>   	m = find_module(name);
>   	if (!m) {
> -		LOG("module is not loaded\n");
> +		ERROR("module is not loaded\n");
>   		return -1;
>   	}
>   	ret = syscall(__NR_delete_module, m->name, 0);
>
>   	if (ret)
> -		LOG("unloading the module failed\n");
> +		ERROR("unloading the module failed\n");
>
>   	free_modules();
>
> @@ -616,13 +623,13 @@ static int main_modinfo(int argc, char **argv)
>   	name = get_module_name(argv[1]);
>   	m = find_module(name);
>   	if (!m) {
> -		LOG("cannot find module - %s\n", argv[1]);
> +		ERROR("cannot find module - %s\n", argv[1]);
>   		return -1;
>   	}
>
>   	name = get_module_path(m->name);
>   	if (!name) {
> -		LOG("cannot find path of module - %s\n", m->name);
> +		ERROR("cannot find path of module - %s\n", m->name);
>   		return -1;
>   	}
>
> @@ -648,10 +655,10 @@ static int main_modprobe(int argc, char **argv)
>   	name = get_module_name(argv[1]);
>   	m = find_module(name);
>   	if (m && m->state == LOADED) {
> -		LOG("%s is already loaded\n", name);
> +		ERROR("%s is already loaded\n", name);
>   		return -1;
>   	} else if (!m) {
> -		LOG("failed to find a module named %s\n", name);
> +		ERROR("failed to find a module named %s\n", name);
>   	} else {
>   		int fail;
>
> @@ -660,12 +667,12 @@ static int main_modprobe(int argc, char **argv)
>   		fail = load_modprobe();
>
>   		if (fail) {
> -			LOG("%d module%s could not be probed\n",
> +			ERROR("%d module%s could not be probed\n",
>   					fail, (fail == 1) ? ("") :
("s"));
>
>   			avl_for_each_element(&modules, m, avl)
>   				if ((m->state == PROBE) || m->error)
> -					LOG("- %s\n", m->name);
> +					ERROR("- %s\n", m->name);
>   		}
>   	}
>
> @@ -710,7 +717,7 @@ static int main_loader(int argc, char **argv)
>   		char *mod = NULL;
>
>   		if (!fp) {
> -			LOG("failed to open %s\n", gl.gl_pathv[j]);
> +			ERROR("failed to open %s\n", gl.gl_pathv[j]);
>   			continue;
>   		}
>
> @@ -742,15 +749,15 @@ static int main_loader(int argc, char **argv)
>   	}
>
>   	fail = load_modprobe();
> -	LOG("ran %d iterations\n", iterations);
> +	DEBUG("ran %d iterations\n", iterations);
>
>   	if (fail) {
> -		LOG("%d module%s could not be probed\n",
> +		ERROR("%d module%s could not be probed\n",
>   				fail, (fail == 1) ? ("") : ("s"));
>
>   		avl_for_each_element(&modules, m, avl)
>   			if ((m->state == PROBE) || (m->error))
> -				LOG("- %s - %d\n", m->name,
deps_available(m, 1));
> +				ERROR("- %s - %d\n", m->name,
deps_available(m, 1));
>   	}
>
>   out:
>
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