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Commit 1e7972cc authored by Arnaldo Carvalho de Melo's avatar Arnaldo Carvalho de Melo
Browse files

perf util: Move do_read from session to util 



Not really something to be exported from session.c. Rename it to
'readn' as others did in the past.

Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Tom Zanussi <tzanussi@gmail.com>
LKML-Reference: <new-submission>
Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent daec78a0

tools/perf/util/header.c

+3 −3
Original line number Diff line number Diff line
@@ -604,7 +604,7 @@ int perf_header__write(struct perf_header *self, int fd, bool at_exit) 
static int perf_header__getbuffer64(struct perf_header *self,

				    int fd, void *buf, size_t size)

{

	if (do_read(fd, buf, size) <= 0)

	if (readn(fd, buf, size) <= 0)

		return -1;



	if (self->needs_swap)
@@ -660,7 +660,7 @@ int perf_file_header__read(struct perf_file_header *self, 
{

	lseek(fd, 0, SEEK_SET);



	if (do_read(fd, self, sizeof(*self)) <= 0 ||

	if (readn(fd, self, sizeof(*self)) <= 0 ||

	    memcmp(&self->magic, __perf_magic, sizeof(self->magic)))

		return -1;
@@ -821,7 +821,7 @@ static int perf_file_header__read_pipe(struct perf_pipe_file_header *self, 
				       struct perf_header *ph, int fd,

				       bool repipe)

{

	if (do_read(fd, self, sizeof(*self)) <= 0 ||

	if (readn(fd, self, sizeof(*self)) <= 0 ||

	    memcmp(&self->magic, __perf_magic, sizeof(self->magic)))

		return -1;

tools/perf/util/session.c

+2 −20
Original line number Diff line number Diff line
@@ -838,23 +838,6 @@ static struct thread *perf_session__register_idle_thread(struct perf_session *se 
	return thread;

}



int do_read(int fd, void *buf, size_t size)

{

	void *buf_start = buf;



	while (size) {

		int ret = read(fd, buf, size);



		if (ret <= 0)

			return ret;



		size -= ret;

		buf += ret;

	}



	return buf - buf_start;

}



#define session_done()	(*(volatile int *)(&session_done))

volatile int session_done;
@@ -872,7 +855,7 @@ static int __perf_session__process_pipe_events(struct perf_session *self, 


	head = 0;

more:

	err = do_read(self->fd, &event, sizeof(struct perf_event_header));

	err = readn(self->fd, &event, sizeof(struct perf_event_header));

	if (err <= 0) {

		if (err == 0)

			goto done;
@@ -892,8 +875,7 @@ more: 
	p += sizeof(struct perf_event_header);



	if (size - sizeof(struct perf_event_header)) {

		err = do_read(self->fd, p,

			      size - sizeof(struct perf_event_header));

		err = readn(self->fd, p, size - sizeof(struct perf_event_header));

		if (err <= 0) {

			if (err == 0) {

				pr_err("unexpected end of event stream\n");

tools/perf/util/session.h

+0 −1
Original line number Diff line number Diff line
@@ -109,7 +109,6 @@ void mem_bswap_64(void *src, int byte_size); 


int perf_session__create_kernel_maps(struct perf_session *self);



int do_read(int fd, void *buf, size_t size);

void perf_session__update_sample_type(struct perf_session *self);

void perf_session__set_sample_id_all(struct perf_session *session, bool value);

void perf_session__set_sample_type(struct perf_session *session, u64 type);

tools/perf/util/util.c

+17 −0
Original line number Diff line number Diff line
@@ -114,3 +114,20 @@ unsigned long convert_unit(unsigned long value, char *unit) 


	return value;

}



int readn(int fd, void *buf, size_t n)

{

	void *buf_start = buf;



	while (n) {

		int ret = read(fd, buf, n);



		if (ret <= 0)

			return ret;



		n -= ret;

		buf += ret;

	}



	return buf - buf_start;

}

tools/perf/util/util.h

+1 −0
Original line number Diff line number Diff line
@@ -265,6 +265,7 @@ void argv_free(char **argv); 
bool strglobmatch(const char *str, const char *pat);

bool strlazymatch(const char *str, const char *pat);

unsigned long convert_unit(unsigned long value, char *unit);

int readn(int fd, void *buf, size_t size);



#define _STR(x) #x

#define STR(x) _STR(x)