#include <babeltrace/format.h>
#include <babeltrace/ctf/types.h>
+#include <babeltrace/ctf/metadata.h>
+#include <babeltrace/babeltrace.h>
+#include <errno.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <dirent.h>
+#include <glib.h>
+#include <unistd.h>
+#include <stdlib.h>
+
+
+#include "metadata/ctf-scanner.h"
+#include "metadata/ctf-parser.h"
+#include "metadata/ctf-ast.h"
+
+extern int yydebug;
+
+struct trace_descriptor {
+ struct ctf_trace ctf_trace;
+};
+
+struct trace_descriptor *ctf_open_trace(const char *path, int flags);
+void ctf_close_trace(struct trace_descriptor *descriptor);
static struct format ctf_format = {
.uint_read = ctf_uint_read,
.array_end = ctf_array_end,
.sequence_begin = ctf_sequence_begin,
.sequence_end = ctf_sequence_end,
+ .open_trace = ctf_open_trace,
+ .close_trace = ctf_close_trace,
};
+/*
+ * TODO: for now, we treat the metadata file as a simple text file
+ * (without any header nor packets nor padding).
+ */
+static
+int ctf_open_trace_metadata_read(struct trace_descriptor *td)
+{
+ struct ctf_scanner *scanner;
+ FILE *fp;
+ int ret = 0;
+
+ td->ctf_trace.metadata.fd = openat(td->ctf_trace.dirfd,
+ "metadata", O_RDONLY);
+ if (td->ctf_trace.metadata.fd < 0) {
+ fprintf(stdout, "Unable to open metadata.\n");
+ return td->ctf_trace.metadata.fd;
+ }
+
+ if (babeltrace_debug)
+ yydebug = 1;
+
+ fp = fdopen(td->ctf_trace.metadata.fd, "r");
+ if (!fp) {
+ fprintf(stdout, "Unable to open metadata stream.\n");
+ ret = -errno;
+ goto end_stream;
+ }
+
+ scanner = ctf_scanner_alloc(fp);
+ if (!scanner) {
+ fprintf(stdout, "Error allocating scanner\n");
+ ret = -ENOMEM;
+ goto end_scanner_alloc;
+ }
+ ret = ctf_scanner_append_ast(scanner);
+ if (ret) {
+ fprintf(stdout, "Error creating AST\n");
+ goto end;
+ }
+
+ if (babeltrace_debug) {
+ ret = ctf_visitor_print_xml(stdout, 0, &scanner->ast->root);
+ if (ret) {
+ fprintf(stdout, "Error visiting AST for XML output\n");
+ goto end;
+ }
+ }
+
+ ret = ctf_visitor_semantic_check(stdout, 0, &scanner->ast->root);
+ if (ret) {
+ fprintf(stdout, "Error in CTF semantic validation %d\n", ret);
+ goto end;
+ }
+ ret = ctf_visitor_construct_metadata(stdout, 0, &scanner->ast->root,
+ &td->ctf_trace, BYTE_ORDER);
+ if (ret) {
+ fprintf(stdout, "Error in CTF metadata constructor %d\n", ret);
+ goto end;
+ }
+end:
+ ctf_scanner_free(scanner);
+end_scanner_alloc:
+ fclose(fp);
+end_stream:
+ close(td->ctf_trace.metadata.fd);
+ return ret;
+}
+
+static
+int ctf_open_trace_read(struct trace_descriptor *td, const char *path, int flags)
+{
+ int ret;
+ struct dirent *dirent;
+ struct dirent *diriter;
+ size_t dirent_len;
+
+ td->ctf_trace.flags = flags;
+
+ /* Open trace directory */
+ td->ctf_trace.dir = opendir(path);
+ if (!td->ctf_trace.dir) {
+ fprintf(stdout, "Unable to open trace directory.\n");
+ ret = -ENOENT;
+ goto error;
+ }
+
+ td->ctf_trace.dirfd = open(path, 0);
+ if (td->ctf_trace.dirfd < 0) {
+ fprintf(stdout, "Unable to open trace directory file descriptor.\n");
+ ret = -ENOENT;
+ goto error_dirfd;
+ }
+ /*
+ * Keep the metadata file separate.
+ */
+
+ ret = ctf_open_trace_metadata_read(td);
+ if (ret) {
+ goto error_metadata;
+ }
+
+ /*
+ * Open each stream: for each file, try to open, check magic
+ * number, and get the stream ID to add to the right location in
+ * the stream array.
+ */
+
+ dirent_len = offsetof(struct dirent, d_name) +
+ fpathconf(td->ctf_trace.dirfd, _PC_NAME_MAX) + 1;
+
+ dirent = malloc(dirent_len);
+
+ for (;;) {
+ ret = readdir_r(td->ctf_trace.dir, dirent, &diriter);
+ if (ret) {
+ fprintf(stdout, "Readdir error.\n");
+ goto readdir_error;
+
+ }
+ if (!diriter)
+ break;
+ if (!strcmp(diriter->d_name, ".")
+ || !strcmp(diriter->d_name, "..")
+ || !strcmp(diriter->d_name, "metadata"))
+ continue;
+ }
+
+ free(dirent);
+ return 0;
+
+readdir_error:
+ free(dirent);
+error_metadata:
+ close(td->ctf_trace.dirfd);
+error_dirfd:
+ closedir(td->ctf_trace.dir);
+error:
+ return ret;
+}
+
+static
+int ctf_open_trace_write(struct trace_descriptor *td, const char *path, int flags)
+{
+ int ret;
+
+ ret = mkdir(path, S_IRWXU|S_IRWXG);
+ if (ret)
+ return ret;
+
+ /* Open trace directory */
+ td->ctf_trace.dir = opendir(path);
+ if (!td->ctf_trace.dir) {
+ fprintf(stdout, "Unable to open trace directory.\n");
+ ret = -ENOENT;
+ goto error;
+ }
+
+
+ return 0;
+
+error:
+ return ret;
+}
+
+struct trace_descriptor *ctf_open_trace(const char *path, int flags)
+{
+ struct trace_descriptor *td;
+ int ret;
+
+ td = g_new0(struct trace_descriptor, 1);
+
+ switch (flags) {
+ case O_RDONLY:
+ ret = ctf_open_trace_read(td, path, flags);
+ if (ret)
+ goto error;
+ break;
+ case O_WRONLY:
+ ret = ctf_open_trace_write(td, path, flags);
+ if (ret)
+ goto error;
+ break;
+ default:
+ fprintf(stdout, "Incorrect open flags.\n");
+ goto error;
+ }
+
+ return td;
+error:
+ g_free(td);
+ return NULL;
+}
+
+void ctf_close_trace(struct trace_descriptor *td)
+{
+ closedir(td->ctf_trace.dir);
+ g_free(td);
+}
+
void __attribute__((constructor)) ctf_init(void)
{
int ret;
projects / babeltrace.git / blobdiff