perf tools: Clean up O_LARGEFILE et al usage
Setting _FILE_OFFSET_BITS and using O_LARGEFILE, lseek64, etc, is redundant. Thanks H. Peter Anvin for pointing it out. So, this patch removes O_LARGEFILE, lseek64, etc. Suggested-by: "H. Peter Anvin" <hpa@zytor.com> Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> LKML-Reference: <4B6A8972.3070605@cn.fujitsu.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
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@ -5,7 +5,6 @@
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* (or a CPU, or a PID) into the perf.data output file - for
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* later analysis via perf report.
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*/
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#define _LARGEFILE64_SOURCE
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#define _FILE_OFFSET_BITS 64
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#include "builtin.h"
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@ -451,7 +450,7 @@ static int __cmd_record(int argc, const char **argv)
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append_file = 0;
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}
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flags = O_CREAT|O_RDWR|O_LARGEFILE;
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flags = O_CREAT|O_RDWR;
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if (append_file)
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file_new = 0;
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else
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@ -1,4 +1,3 @@
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#define _LARGEFILE64_SOURCE
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#define _FILE_OFFSET_BITS 64
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#include <sys/types.h>
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@ -388,7 +387,7 @@ static int perf_header__adds_write(struct perf_header *self, int fd)
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sec_size = sizeof(*feat_sec) * nr_sections;
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sec_start = self->data_offset + self->data_size;
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lseek64(fd, sec_start + sec_size, SEEK_SET);
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lseek(fd, sec_start + sec_size, SEEK_SET);
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if (perf_header__has_feat(self, HEADER_TRACE_INFO)) {
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struct perf_file_section *trace_sec;
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@ -396,9 +395,9 @@ static int perf_header__adds_write(struct perf_header *self, int fd)
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trace_sec = &feat_sec[idx++];
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/* Write trace info */
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trace_sec->offset = lseek64(fd, 0, SEEK_CUR);
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trace_sec->offset = lseek(fd, 0, SEEK_CUR);
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read_tracing_data(fd, attrs, nr_counters);
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trace_sec->size = lseek64(fd, 0, SEEK_CUR) - trace_sec->offset;
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trace_sec->size = lseek(fd, 0, SEEK_CUR) - trace_sec->offset;
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}
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@ -408,18 +407,18 @@ static int perf_header__adds_write(struct perf_header *self, int fd)
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buildid_sec = &feat_sec[idx++];
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/* Write build-ids */
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buildid_sec->offset = lseek64(fd, 0, SEEK_CUR);
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buildid_sec->offset = lseek(fd, 0, SEEK_CUR);
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err = dsos__write_buildid_table(fd);
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if (err < 0) {
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pr_debug("failed to write buildid table\n");
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goto out_free;
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}
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buildid_sec->size = lseek64(fd, 0, SEEK_CUR) -
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buildid_sec->size = lseek(fd, 0, SEEK_CUR) -
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buildid_sec->offset;
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dsos__cache_build_ids();
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}
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lseek64(fd, sec_start, SEEK_SET);
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lseek(fd, sec_start, SEEK_SET);
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err = do_write(fd, feat_sec, sec_size);
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if (err < 0)
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pr_debug("failed to write feature section\n");
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@ -513,7 +512,7 @@ int perf_header__write(struct perf_header *self, int fd, bool at_exit)
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pr_debug("failed to write perf header\n");
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return err;
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}
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lseek64(fd, self->data_offset + self->data_size, SEEK_SET);
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lseek(fd, self->data_offset + self->data_size, SEEK_SET);
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self->frozen = 1;
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return 0;
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@ -567,7 +566,7 @@ int perf_header__process_sections(struct perf_header *self, int fd,
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sec_size = sizeof(*feat_sec) * nr_sections;
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lseek64(fd, self->data_offset + self->data_size, SEEK_SET);
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lseek(fd, self->data_offset + self->data_size, SEEK_SET);
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if (perf_header__getbuffer64(self, fd, feat_sec, sec_size))
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goto out_free;
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@ -641,7 +640,7 @@ static int perf_file_section__process(struct perf_file_section *self,
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struct perf_header *ph,
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int feat, int fd)
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{
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if (lseek64(fd, self->offset, SEEK_SET) < 0) {
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if (lseek(fd, self->offset, SEEK_SET) == (off_t)-1) {
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pr_debug("Failed to lseek to %Ld offset for feature %d, "
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"continuing...\n", self->offset, feat);
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return 0;
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@ -1,4 +1,3 @@
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#define _LARGEFILE64_SOURCE
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#define _FILE_OFFSET_BITS 64
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#include <linux/kernel.h>
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@ -15,7 +14,7 @@ static int perf_session__open(struct perf_session *self, bool force)
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{
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struct stat input_stat;
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self->fd = open(self->filename, O_RDONLY|O_LARGEFILE);
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self->fd = open(self->filename, O_RDONLY);
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if (self->fd < 0) {
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pr_err("failed to open file: %s", self->filename);
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if (!strcmp(self->filename, "perf.data"))
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@ -18,7 +18,7 @@
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*
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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*/
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#define _LARGEFILE64_SOURCE
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#define _FILE_OFFSET_BITS 64
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#include <dirent.h>
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#include <stdio.h>
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@ -83,7 +83,7 @@ static char *read_string(void)
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char *str = NULL;
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int size = 0;
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int i;
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s64 r;
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off_t r;
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for (;;) {
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r = read(input_fd, buf, BUFSIZ);
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@ -117,8 +117,8 @@ static char *read_string(void)
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i++;
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/* move the file descriptor to the end of the string */
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r = lseek64(input_fd, -(r - i), SEEK_CUR);
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if (r < 0)
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r = lseek(input_fd, -(r - i), SEEK_CUR);
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if (r == (off_t)-1)
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die("lseek");
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if (str) {
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@ -282,8 +282,8 @@ static void update_cpu_data_index(int cpu)
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static void get_next_page(int cpu)
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{
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off64_t save_seek;
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off64_t ret;
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off_t save_seek;
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off_t ret;
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if (!cpu_data[cpu].page)
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return;
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@ -298,17 +298,17 @@ static void get_next_page(int cpu)
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update_cpu_data_index(cpu);
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/* other parts of the code may expect the pointer to not move */
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save_seek = lseek64(input_fd, 0, SEEK_CUR);
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save_seek = lseek(input_fd, 0, SEEK_CUR);
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ret = lseek64(input_fd, cpu_data[cpu].offset, SEEK_SET);
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if (ret < 0)
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ret = lseek(input_fd, cpu_data[cpu].offset, SEEK_SET);
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if (ret == (off_t)-1)
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die("failed to lseek");
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ret = read(input_fd, cpu_data[cpu].page, page_size);
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if (ret < 0)
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die("failed to read page");
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/* reset the file pointer back */
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lseek64(input_fd, save_seek, SEEK_SET);
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lseek(input_fd, save_seek, SEEK_SET);
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return;
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}
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