Commit 2ff5365d authored by David Carrillo-Cisneros's avatar David Carrillo-Cisneros Committed by Arnaldo Carvalho de Melo

perf header: Fail on write_padded error

Do not proceed if write_padded() error failed.

Also, add comments to remind that the return value of write_* functions
in util/header.c is an errno code and not the number of bytes written.
Signed-off-by: default avatarDavid Carrillo-Cisneros <davidcc@google.com>
Acked-by: default avatarDavid Ahern <dsahern@gmail.com>
Acked-by: default avatarJiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: He Kuang <hekuang@huawei.com>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Turner <pjt@google.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Simon Que <sque@chromium.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/r/20170718042549.145161-4-davidcc@google.comSigned-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent dfaa1580
......@@ -74,6 +74,7 @@ bool perf_header__has_feat(const struct perf_header *header, int feat)
return test_bit(feat, header->adds_features);
}
/* Return: 0 if succeded, -ERR if failed. */
static int do_write(int fd, const void *buf, size_t size)
{
while (size) {
......@@ -89,6 +90,7 @@ static int do_write(int fd, const void *buf, size_t size)
return 0;
}
/* Return: 0 if succeded, -ERR if failed. */
int write_padded(int fd, const void *bf, size_t count, size_t count_aligned)
{
static const char zero_buf[NAME_ALIGN];
......@@ -103,6 +105,7 @@ int write_padded(int fd, const void *bf, size_t count, size_t count_aligned)
#define string_size(str) \
(PERF_ALIGN((strlen(str) + 1), NAME_ALIGN) + sizeof(u32))
/* Return: 0 if succeded, -ERR if failed. */
static int do_write_string(int fd, const char *str)
{
u32 len, olen;
......@@ -3200,7 +3203,8 @@ int perf_event__synthesize_tracing_data(struct perf_tool *tool, int fd,
*/
tracing_data_put(tdata);
write_padded(fd, NULL, 0, padding);
if (write_padded(fd, NULL, 0, padding))
return -1;
return aligned_size;
}
......
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