X-Git-Url: https://git.lttng.org/?p=lttng-tools.git;a=blobdiff_plain;f=src%2Fcommon%2Fsnapshot.c;fp=src%2Fcommon%2Fsnapshot.c;h=9d1627fcb142f6858c2516ca54df3eb6c642fffe;hp=0000000000000000000000000000000000000000;hb=b30fa1919a1e0274b8d4734acb8cb54753808609;hpb=55e2fc3352373de6ff8ba7cf908d1025b432d9a8

diff --git a/src/common/snapshot.c b/src/common/snapshot.c
new file mode 100644
index 000000000..9d1627fcb
--- /dev/null
+++ b/src/common/snapshot.c
@@ -0,0 +1,174 @@
+/*
+ * Copyright (C) 2020 Simon Marchi <simon.marchi@efficios.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0-only
+ *
+ */
+
+#include <common/buffer-view.h>
+#include <common/dynamic-buffer.h>
+#include <common/snapshot.h>
+#include <lttng/snapshot-internal.h>
+#include <lttng/snapshot.h>
+
+#include <assert.h>
+#include <stdlib.h>
+
+LTTNG_HIDDEN
+bool lttng_snapshot_output_validate(const struct lttng_snapshot_output *output)
+{
+	bool valid = false;
+	size_t len;
+
+	/*
+	 * It is mandatory to have a ctrl_url. If there is only one output
+	 * URL (in the net://, net6:// or file:// form), it will be in this
+	 * field.
+	 */
+	len = lttng_strnlen(output->ctrl_url, sizeof(output->ctrl_url));
+	if (len == 0 || len >= sizeof(output->ctrl_url)) {
+		goto end;
+	}
+
+	len = lttng_strnlen(output->data_url, sizeof(output->data_url));
+	if (len >= sizeof(output->data_url)) {
+		goto end;
+	}
+
+	len = lttng_strnlen(output->name, sizeof(output->name));
+	if (len >= sizeof(output->name)) {
+		goto end;
+	}
+
+	valid = true;
+
+end:
+	return valid;
+}
+
+LTTNG_HIDDEN
+bool lttng_snapshot_output_is_equal(
+		const struct lttng_snapshot_output *a,
+		const struct lttng_snapshot_output *b)
+{
+	bool equal = false;
+
+	assert(a);
+	assert(b);
+
+	if (a->max_size != b->max_size) {
+		goto end;
+	}
+
+	if (strcmp(a->name, b->name) != 0) {
+		goto end;
+	}
+
+	if (strcmp(a->ctrl_url, b->ctrl_url) != 0) {
+		goto end;
+	}
+
+	if (strcmp(a->data_url, b->data_url) != 0) {
+		goto end;
+	}
+
+	equal = true;
+
+end:
+	return equal;
+}
+
+/*
+ * This is essentially the same as `struct lttng_snapshot_output`, but packed.
+ */
+struct lttng_snapshot_output_comm {
+	uint32_t id;
+	uint64_t max_size;
+	char name[LTTNG_NAME_MAX];
+	char ctrl_url[PATH_MAX];
+	char data_url[PATH_MAX];
+} LTTNG_PACKED;
+
+LTTNG_HIDDEN
+int lttng_snapshot_output_serialize(
+		const struct lttng_snapshot_output *output,
+		struct lttng_dynamic_buffer *buf)
+{
+	struct lttng_snapshot_output_comm comm;
+	int ret;
+
+	comm.id = output->id;
+	comm.max_size = output->max_size;
+
+	ret = lttng_strncpy(comm.name, output->name, sizeof(comm.name));
+	if (ret) {
+		goto end;
+	}
+
+	ret = lttng_strncpy(comm.ctrl_url, output->ctrl_url, sizeof(comm.ctrl_url));
+	if (ret) {
+		goto end;
+	}
+
+	ret = lttng_strncpy(comm.data_url, output->data_url, sizeof(comm.data_url));
+	if (ret) {
+		goto end;
+	}
+
+	ret = lttng_dynamic_buffer_append(buf, &comm, sizeof(comm));
+	if (ret) {
+		goto end;
+	}
+
+end:
+	return ret;
+}
+
+LTTNG_HIDDEN
+ssize_t lttng_snapshot_output_create_from_buffer(
+		const struct lttng_buffer_view *view,
+		struct lttng_snapshot_output **output_p)
+{
+	const struct lttng_snapshot_output_comm *comm;
+	struct lttng_snapshot_output *output = NULL;
+	int ret;
+
+	if (view->size != sizeof(*comm)) {
+		ret = -1;
+		goto end;
+	}
+
+	output = lttng_snapshot_output_create();
+	if (!output) {
+		ret = -1;
+		goto end;
+	}
+
+	comm = (const struct lttng_snapshot_output_comm *) view->data;
+
+	output->id = comm->id;
+	output->max_size = comm->max_size;
+
+	ret = lttng_strncpy(output->name, comm->name, sizeof(output->name));
+	if (ret) {
+		goto end;
+	}
+
+	ret = lttng_strncpy(output->ctrl_url, comm->ctrl_url, sizeof(output->ctrl_url));
+	if (ret) {
+		goto end;
+	}
+
+	ret = lttng_strncpy(output->data_url, comm->data_url, sizeof(output->data_url));
+	if (ret) {
+		goto end;
+	}
+
+	*output_p = output;
+	output = NULL;
+	ret = sizeof(*comm);
+
+end:
+	lttng_snapshot_output_destroy(output);
+	return ret;
+}