@@ -3684,7 +3684,9 @@ struct tracecmd_input *tracecmd_alloc_fd(int fd, int flags)
char test[] = TRACECMD_MAGIC;
unsigned int page_size;
size_t offset;
- char *version;
+ char *version = NULL;
+ char *zver = NULL;
+ char *zname = NULL;
char buf[BUFSIZ];
unsigned long ver;
@@ -3723,6 +3725,7 @@ struct tracecmd_input *tracecmd_alloc_fd(int fd, int flags)
}
handle->file_version = ver;
free(version);
+ version = NULL;
if (do_read_check(handle, buf, 1))
goto failed_read;
@@ -3752,11 +3755,38 @@ struct tracecmd_input *tracecmd_alloc_fd(int fd, int flags)
handle->total_file_size = lseek64(handle->fd, 0, SEEK_END);
lseek64(handle->fd, offset, SEEK_SET);
+ if (handle->file_version >= 7) {
+ zname = read_string(handle);
+ if (!zname)
+ goto failed_read;
+ zver = read_string(handle);
+ if (!zver)
+ goto failed_read;
+ if (strcmp(zname, "none")) {
+ handle->compress = tracecmd_compress_alloc(zname, zver,
+ handle->fd,
+ handle->pevent, NULL);
+ if (!handle->compress) {
+ tracecmd_warning("Unsupported file compression %s %s", zname, zver);
+ goto failed_read;
+ }
+ }
+ if (read8(handle, &(handle->options_start))) {
+ tracecmd_warning("Filed to read the offset of the first option section");
+ goto failed_read;
+ }
+ free(zname);
+ free(zver);
+ }
+
handle->file_state = TRACECMD_FILE_INIT;
return handle;
failed_read:
+ free(version);
+ free(zname);
+ free(zver);
free(handle);
return NULL;
@@ -3952,7 +3982,8 @@ void tracecmd_close(struct tracecmd_input *handle)
if (handle->flags & TRACECMD_FL_BUFFER_INSTANCE)
tracecmd_close(handle->parent);
else {
- /* Only main handle frees plugins and pevent */
+ /* Only main handle frees plugins, pevent and compression context */
+ tracecmd_compress_destroy(handle->compress);
tep_unload_plugins(handle->plugin_list, handle->pevent);
tep_free(handle->pevent);
}
Trace file version 7 introduced new mandatory compression header, storing information about the compression algorithm used to compress the trace file. Added code to read that header and to initialize compression context according to it. Signed-off-by: Tzvetomir Stoyanov (VMware) <tz.stoyanov@gmail.com> --- lib/trace-cmd/trace-input.c | 35 +++++++++++++++++++++++++++++++++-- 1 file changed, 33 insertions(+), 2 deletions(-)