perf tools: Use O_LARGEFILE to open perf data file

Open perf data file with O_LARGEFILE flag since its size is
easily larger that 2G.

For example:

 # rm -rf perf.data
 # ./perf kmem record sleep 300

 [ perf record: Woken up 0 times to write data ]
 [ perf record: Captured and wrote 3142.147 MB perf.data
 (~137282513 samples) ]

 # ll -h perf.data
 -rw------- 1 root root 3.1G .....

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: <4B68F32A.9040203@cn.fujitsu.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

3 files changed, 19 insertions, 12 deletions

diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c
index 2bb2bdb1f456..ed3efd728b41 100644
--- a/tools/perf/util/header.c
+++ b/tools/perf/util/header.c
@@ -1,3 +1,6 @@
+#define _LARGEFILE64_SOURCE
+#define _FILE_OFFSET_BITS 64
+
 #include <sys/types.h>
 #include <byteswap.h>
 #include <unistd.h>
@@ -382,7 +385,7 @@ static int perf_header__adds_write(struct perf_header *self, int fd)
         sec_size = sizeof(*feat_sec) * nr_sections;
 
         sec_start = self->data_offset + self->data_size;
-        lseek(fd, sec_start + sec_size, SEEK_SET);
+        lseek64(fd, sec_start + sec_size, SEEK_SET);
 
         if (perf_header__has_feat(self, HEADER_TRACE_INFO)) {
                 struct perf_file_section *trace_sec;
@@ -390,9 +393,9 @@ static int perf_header__adds_write(struct perf_header *self, int fd)
                 trace_sec = &feat_sec[idx++];
 
                 /* Write trace info */
-                trace_sec->offset = lseek(fd, 0, SEEK_CUR);
+                trace_sec->offset = lseek64(fd, 0, SEEK_CUR);
                 read_tracing_data(fd, attrs, nr_counters);
-                trace_sec->size = lseek(fd, 0, SEEK_CUR) - trace_sec->offset;
+                trace_sec->size = lseek64(fd, 0, SEEK_CUR) - trace_sec->offset;
         }
 
 
@@ -402,17 +405,18 @@ static int perf_header__adds_write(struct perf_header *self, int fd)
                 buildid_sec = &feat_sec[idx++];
 
                 /* Write build-ids */
-                buildid_sec->offset = lseek(fd, 0, SEEK_CUR);
+                buildid_sec->offset = lseek64(fd, 0, SEEK_CUR);
                 err = dsos__write_buildid_table(fd);
                 if (err < 0) {
                         pr_debug("failed to write buildid table\n");
                         goto out_free;
                 }
-                buildid_sec->size = lseek(fd, 0, SEEK_CUR) - buildid_sec->offset;
+                buildid_sec->size = lseek64(fd, 0, SEEK_CUR) -
+                                            buildid_sec->offset;
                 dsos__cache_build_ids();
         }
 
-        lseek(fd, sec_start, SEEK_SET);
+        lseek64(fd, sec_start, SEEK_SET);
         err = do_write(fd, feat_sec, sec_size);
         if (err < 0)
                 pr_debug("failed to write feature section\n");
@@ -506,7 +510,7 @@ int perf_header__write(struct perf_header *self, int fd, bool at_exit)
                 pr_debug("failed to write perf header\n");
                 return err;
         }
-        lseek(fd, self->data_offset + self->data_size, SEEK_SET);
+        lseek64(fd, self->data_offset + self->data_size, SEEK_SET);
 
         self->frozen = 1;
         return 0;
@@ -560,7 +564,7 @@ int perf_header__process_sections(struct perf_header *self, int fd,
 
         sec_size = sizeof(*feat_sec) * nr_sections;
 
-        lseek(fd, self->data_offset + self->data_size, SEEK_SET);
+        lseek64(fd, self->data_offset + self->data_size, SEEK_SET);
 
         if (perf_header__getbuffer64(self, fd, feat_sec, sec_size))
                 goto out_free;
@@ -634,7 +638,7 @@ static int perf_file_section__process(struct perf_file_section *self,
                                       struct perf_header *ph,
                                       int feat, int fd)
 {
-        if (lseek(fd, self->offset, SEEK_SET) < 0) {
+        if (lseek64(fd, self->offset, SEEK_SET) < 0) {
                 pr_debug("Failed to lseek to %Ld offset for feature %d, "
                          "continuing...\n", self->offset, feat);
                 return 0;
diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c
index 8e7c1896eaa2..cf91d099f0aa 100644
--- a/tools/perf/util/session.c
+++ b/tools/perf/util/session.c
@@ -1,3 +1,6 @@
+#define _LARGEFILE64_SOURCE
+#define _FILE_OFFSET_BITS 64
+
 #include <linux/kernel.h>
 
 #include <byteswap.h>
@@ -12,7 +15,7 @@ static int perf_session__open(struct perf_session *self, bool force)
 {
         struct stat input_stat;
 
-        self->fd = open(self->filename, O_RDONLY);
+        self->fd = open(self->filename, O_RDONLY|O_LARGEFILE);
         if (self->fd < 0) {
                 pr_err("failed to open file: %s", self->filename);
                 if (!strcmp(self->filename, "perf.data"))
diff --git a/tools/perf/util/trace-event-read.c b/tools/perf/util/trace-event-read.c
index 1744422cafcb..ca3c26d466f3 100644
--- a/tools/perf/util/trace-event-read.c
+++ b/tools/perf/util/trace-event-read.c
@@ -83,7 +83,7 @@ static char *read_string(void)
         char *str = NULL;
         int size = 0;
         int i;
-        int r;
+        s64 r;
 
         for (;;) {
                 r = read(input_fd, buf, BUFSIZ);
@@ -117,7 +117,7 @@ static char *read_string(void)
         i++;
 
         /* move the file descriptor to the end of the string */
-        r = lseek(input_fd, -(r - i), SEEK_CUR);
+        r = lseek64(input_fd, -(r - i), SEEK_CUR);
         if (r < 0)
                 die("lseek");