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Commit 0bb93490 authored by Wang Nan's avatar Wang Nan Committed by Arnaldo Carvalho de Melo
Browse files

perf bpf: Rename bpf config to program config 



Following patches are going to introduce BPF object level configuration
to enable setting values into BPF maps. To avoid confusion, this patch
renames existing 'config' in bpf-loader.c to 'program config'. Following
patches would introduce 'object config'.

Signed-off-by: default avatarWang Nan <wangnan0@huawei.com>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Zefan Li <lizefan@huawei.com>
Cc: pi3orama@163.com
Link: http://lkml.kernel.org/r/1448614067-197576-4-git-send-email-wangnan0@huawei.com


Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent 561bbcca

tools/perf/util/bpf-loader.c

+32 −33
Original line number Diff line number Diff line
@@ -120,7 +120,7 @@ bpf_prog_priv__clear(struct bpf_program *prog __maybe_unused, 
}



static int

config__exec(const char *value, struct perf_probe_event *pev)

prog_config__exec(const char *value, struct perf_probe_event *pev)

{

	pev->uprobes = true;

	pev->target = strdup(value);
@@ -130,7 +130,7 @@ config__exec(const char *value, struct perf_probe_event *pev) 
}



static int

config__module(const char *value, struct perf_probe_event *pev)

prog_config__module(const char *value, struct perf_probe_event *pev)

{

	pev->uprobes = false;

	pev->target = strdup(value);
@@ -140,8 +140,7 @@ config__module(const char *value, struct perf_probe_event *pev) 
}



static int

config__bool(const char *value,

	     bool *pbool, bool invert)

prog_config__bool(const char *value, bool *pbool, bool invert)

{

	int err;

	bool bool_value;
@@ -158,17 +157,17 @@ config__bool(const char *value, 
}



static int

config__inlines(const char *value,

prog_config__inlines(const char *value,

		     struct perf_probe_event *pev __maybe_unused)

{

	return config__bool(value, &probe_conf.no_inlines, true);

	return prog_config__bool(value, &probe_conf.no_inlines, true);

}



static int

config__force(const char *value,

prog_config__force(const char *value,

		   struct perf_probe_event *pev __maybe_unused)

{

	return config__bool(value, &probe_conf.force_add, false);

	return prog_config__bool(value, &probe_conf.force_add, false);

}



static struct {
@@ -176,58 +175,58 @@ static struct { 
	const char *usage;

	const char *desc;

	int (*func)(const char *, struct perf_probe_event *);

} bpf_config_terms[] = {

} bpf_prog_config_terms[] = {

	{

		.key	= "exec",

		.usage	= "exec=<full path of file>",

		.desc	= "Set uprobe target",

		.func	= config__exec,

		.func	= prog_config__exec,

	},

	{

		.key	= "module",

		.usage	= "module=<module name>    ",

		.desc	= "Set kprobe module",

		.func	= config__module,

		.func	= prog_config__module,

	},

	{

		.key	= "inlines",

		.usage	= "inlines=[yes|no]        ",

		.desc	= "Probe at inline symbol",

		.func	= config__inlines,

		.func	= prog_config__inlines,

	},

	{

		.key	= "force",

		.usage	= "force=[yes|no]          ",

		.desc	= "Forcibly add events with existing name",

		.func	= config__force,

		.func	= prog_config__force,

	},

};



static int

do_config(const char *key, const char *value,

do_prog_config(const char *key, const char *value,

	       struct perf_probe_event *pev)

{

	unsigned int i;



	pr_debug("config bpf program: %s=%s\n", key, value);

	for (i = 0; i < ARRAY_SIZE(bpf_config_terms); i++)

		if (strcmp(key, bpf_config_terms[i].key) == 0)

			return bpf_config_terms[i].func(value, pev);

	for (i = 0; i < ARRAY_SIZE(bpf_prog_config_terms); i++)

		if (strcmp(key, bpf_prog_config_terms[i].key) == 0)

			return bpf_prog_config_terms[i].func(value, pev);



	pr_debug("BPF: ERROR: invalid config option in object: %s=%s\n",

	pr_debug("BPF: ERROR: invalid program config option: %s=%s\n",

		 key, value);



	pr_debug("\nHint: Currently valid options are:\n");

	for (i = 0; i < ARRAY_SIZE(bpf_config_terms); i++)

		pr_debug("\t%s:\t%s\n", bpf_config_terms[i].usage,

			 bpf_config_terms[i].desc);

	pr_debug("\nHint: Valid options are:\n");

	for (i = 0; i < ARRAY_SIZE(bpf_prog_config_terms); i++)

		pr_debug("\t%s:\t%s\n", bpf_prog_config_terms[i].usage,

			 bpf_prog_config_terms[i].desc);

	pr_debug("\n");



	return -BPF_LOADER_ERRNO__CONFIG_TERM;

	return -BPF_LOADER_ERRNO__PROGCONF_TERM;

}



static const char *

parse_config_kvpair(const char *config_str, struct perf_probe_event *pev)

parse_prog_config_kvpair(const char *config_str, struct perf_probe_event *pev)

{

	char *text = strdup(config_str);

	char *sep, *line;
@@ -253,7 +252,7 @@ parse_config_kvpair(const char *config_str, struct perf_probe_event *pev) 
		}

		*equ = '\0';



		err = do_config(line, equ + 1, pev);

		err = do_prog_config(line, equ + 1, pev);

		if (err)

			break;

nextline:
@@ -268,10 +267,10 @@ parse_config_kvpair(const char *config_str, struct perf_probe_event *pev) 
}



static int

parse_config(const char *config_str, struct perf_probe_event *pev)

parse_prog_config(const char *config_str, struct perf_probe_event *pev)

{

	int err;

	const char *main_str = parse_config_kvpair(config_str, pev);

	const char *main_str = parse_prog_config_kvpair(config_str, pev);



	if (IS_ERR(main_str))

		return PTR_ERR(main_str);
@@ -312,7 +311,7 @@ config_bpf_program(struct bpf_program *prog) 
	pev = &priv->pev;



	pr_debug("bpf: config program '%s'\n", config_str);

	err = parse_config(config_str, pev);

	err = parse_prog_config(config_str, pev);

	if (err)

		goto errout;
@@ -750,7 +749,7 @@ static const char *bpf_loader_strerror_table[NR_ERRNO] = { 
	[ERRCODE_OFFSET(EVENTNAME)]	= "No event name found in config string",

	[ERRCODE_OFFSET(INTERNAL)]	= "BPF loader internal error",

	[ERRCODE_OFFSET(COMPILE)]	= "Error when compiling BPF scriptlet",

	[ERRCODE_OFFSET(CONFIG_TERM)]	= "Invalid config term in config string",

	[ERRCODE_OFFSET(PROGCONF_TERM)]	= "Invalid program config term in config string",

	[ERRCODE_OFFSET(PROLOGUE)]	= "Failed to generate prologue",

	[ERRCODE_OFFSET(PROLOGUE2BIG)]	= "Prologue too big for program",

	[ERRCODE_OFFSET(PROLOGUEOOB)]	= "Offset out of bound for prologue",
@@ -834,7 +833,7 @@ int bpf__strerror_probe(struct bpf_object *obj __maybe_unused, 
			int err, char *buf, size_t size)

{

	bpf__strerror_head(err, buf, size);

	case BPF_LOADER_ERRNO__CONFIG_TERM: {

	case BPF_LOADER_ERRNO__PROGCONF_TERM: {

		scnprintf(buf, size, "%s (add -v to see detail)", emsg);

		break;

	}

tools/perf/util/bpf-loader.h

+1 −1
Original line number Diff line number Diff line
@@ -20,7 +20,7 @@ enum bpf_loader_errno { 
	BPF_LOADER_ERRNO__EVENTNAME,	/* Event name is missing */

	BPF_LOADER_ERRNO__INTERNAL,	/* BPF loader internal error */

	BPF_LOADER_ERRNO__COMPILE,	/* Error when compiling BPF scriptlet */

	BPF_LOADER_ERRNO__CONFIG_TERM,	/* Invalid config term in config term */

	BPF_LOADER_ERRNO__PROGCONF_TERM,/* Invalid program config term in config string */

	BPF_LOADER_ERRNO__PROLOGUE,	/* Failed to generate prologue */

	BPF_LOADER_ERRNO__PROLOGUE2BIG,	/* Prologue too big for program */

	BPF_LOADER_ERRNO__PROLOGUEOOB,	/* Offset out of bound for prologue */