#include <inttypes.h>
#include <sys/mman.h>
#include <babeltrace/ctf-ir/stream.h>
-#include <babeltrace/plugin/notification/iterator.h>
+#include <babeltrace/component/notification/iterator.h>
#include "file.h"
#include "metadata.h"
#include "../common/notif-iter/notif-iter.h"
}
static
-int mmap_next(struct ctf_fs_stream *stream)
+enum bt_ctf_notif_iter_medium_status mmap_next(struct ctf_fs_stream *stream)
{
- int ret = 0;
+ enum bt_ctf_notif_iter_medium_status ret =
+ BT_CTF_NOTIF_ITER_MEDIUM_STATUS_OK;
struct ctf_fs_component *ctf_fs = stream->file->ctf_fs;
/* Unmap old region */
stream->mmap_valid_len = MIN(stream->file->size - stream->mmap_offset,
stream->mmap_max_len);
+ if (stream->mmap_valid_len == 0) {
+ ret = BT_CTF_NOTIF_ITER_MEDIUM_STATUS_EOF;
+ goto end;
+ }
/* Round up to next page, assuming page size being a power of 2. */
stream->mmap_len = (stream->mmap_valid_len + ctf_fs->page_size - 1)
& ~(ctf_fs->page_size - 1);
/* Map new region */
+ assert(stream->mmap_len);
stream->mmap_addr = mmap((void *) 0, stream->mmap_len,
PROT_READ, MAP_PRIVATE, fileno(stream->file->fp),
stream->mmap_offset);
goto end;
error:
stream_munmap(stream);
- ret = -1;
+ ret = BT_CTF_NOTIF_ITER_MEDIUM_STATUS_ERROR;
end:
return ret;
}
goto end;
}
- /* Check if we need an initial memory map */
- if (!stream->mmap_addr) {
- if (mmap_next(stream)) {
- PERR("Cannot memory-map initial region of file \"%s\" (%p)\n",
- stream->file->path->str, stream->file->fp);
- goto error;
- }
- }
-
/* Check if we have at least one memory-mapped byte left */
if (remaining_mmap_bytes(stream) == 0) {
/* Are we at the end of the file? */
- if (stream->request_offset >= stream->file->size) {
+ if (stream->mmap_offset >= stream->file->size) {
PDBG("Reached end of file \"%s\" (%p)\n",
stream->file->path->str, stream->file->fp);
status = BT_CTF_NOTIF_ITER_MEDIUM_STATUS_EOF;
goto end;
}
- if (mmap_next(stream)) {
+ status = mmap_next(stream);
+ switch (status) {
+ case BT_CTF_NOTIF_ITER_MEDIUM_STATUS_OK:
+ break;
+ case BT_CTF_NOTIF_ITER_MEDIUM_STATUS_EOF:
+ goto end;
+ default:
PERR("Cannot memory-map next region of file \"%s\" (%p)\n",
- stream->file->path->str, stream->file->fp);
+ stream->file->path->str,
+ stream->file->fp);
goto error;
}
}
.get_stream = medop_get_stream,
};
+static
+int build_index_from_idx_file(struct ctf_fs_stream *stream)
+{
+ int ret = 0;
+ gchar *directory = NULL;
+ gchar *basename = NULL;
+ GString *index_basename = NULL;
+ gchar *index_file_path = NULL;
+ GMappedFile *mapped_file = NULL;
+ gsize filesize;
+ const struct ctf_packet_index_file_hdr *header;
+ const char *mmap_begin, *file_pos;
+ struct index_entry *index;
+ uint64_t total_packets_size = 0;
+ size_t file_index_entry_size;
+ size_t file_entry_count;
+ size_t i;
+
+ /* Look for index file in relative path index/name.idx. */
+ basename = g_path_get_basename(stream->file->path->str);
+ if (!basename) {
+ ret = -1;
+ goto end;
+ }
+
+ directory = g_path_get_dirname(stream->file->path->str);
+ if (!directory) {
+ ret = -1;
+ goto end;
+ }
+
+ index_basename = g_string_new(basename);
+ if (!index_basename) {
+ ret = -1;
+ goto end;
+ }
+
+ g_string_append(index_basename, ".idx");
+ index_file_path = g_build_filename(directory, "index",
+ index_basename->str, NULL);
+ mapped_file = g_mapped_file_new(index_file_path, FALSE, NULL);
+ if (!mapped_file) {
+ ret = -1;
+ goto end;
+ }
+ filesize = g_mapped_file_get_length(mapped_file);
+ if (filesize < sizeof(*header)) {
+ printf_error("Invalid LTTng trace index: file size < header size");
+ ret = -1;
+ goto end;
+ }
+
+ mmap_begin = g_mapped_file_get_contents(mapped_file);
+ header = (struct ctf_packet_index_file_hdr *) mmap_begin;
+
+ file_pos = g_mapped_file_get_contents(mapped_file) + sizeof(*header);
+ if (be32toh(header->magic) != CTF_INDEX_MAGIC) {
+ printf_error("Invalid LTTng trace index: \"magic\" validation failed");
+ ret = -1;
+ goto end;
+ }
+
+ file_index_entry_size = be32toh(header->packet_index_len);
+ file_entry_count = (filesize - sizeof(*header)) / file_index_entry_size;
+ if ((filesize - sizeof(*header)) % (file_entry_count * file_index_entry_size)) {
+ printf_error("Invalid index file size; not a multiple of index entry size");
+ ret = -1;
+ goto end;
+ }
+
+ stream->index.entries = g_array_sized_new(FALSE, TRUE,
+ sizeof(struct index_entry), file_entry_count);
+ if (!stream->index.entries) {
+ ret = -1;
+ goto end;
+ }
+ index = (struct index_entry *) stream->index.entries->data;
+ for (i = 0; i < file_entry_count; i++) {
+ struct ctf_packet_index *file_index =
+ (struct ctf_packet_index *) file_pos;
+ uint64_t packet_size = be64toh(file_index->packet_size);
+
+ if (packet_size % CHAR_BIT) {
+ ret = -1;
+ printf_error("Invalid packet size encountered in index file");
+ goto invalid_index;
+ }
+
+ /* Convert size in bits to bytes. */
+ packet_size /= CHAR_BIT;
+ index->packet_size = packet_size;
+
+ index->offset = be64toh(file_index->offset);
+ if (i != 0 && index->offset < (index - 1)->offset) {
+ printf_error("Invalid, non-monotonic, packet offset encountered in index file");
+ ret = -1;
+ goto invalid_index;
+ }
+
+ index->timestamp_begin = be64toh(file_index->timestamp_begin);
+ index->timestamp_end = be64toh(file_index->timestamp_end);
+ if (index->timestamp_end < index->timestamp_begin) {
+ printf_error("Invalid packet time bounds encountered in index file");
+ ret = -1;
+ goto invalid_index;
+ }
+
+ total_packets_size += packet_size;
+ file_pos += file_index_entry_size;
+ index++;
+ }
+
+ /* Validate that the index addresses the complete stream. */
+ if (stream->file->size != total_packets_size) {
+ printf_error("Invalid index; indexed size != stream file size");
+ ret = -1;
+ goto invalid_index;
+ }
+end:
+ g_free(directory);
+ g_free(basename);
+ g_free(index_file_path);
+ if (index_basename) {
+ g_string_free(index_basename, TRUE);
+ }
+ if (mapped_file) {
+ g_mapped_file_unref(mapped_file);
+ }
+ return ret;
+invalid_index:
+ g_array_free(stream->index.entries, TRUE);
+ goto end;
+}
+
+static
+int build_index_from_stream(struct ctf_fs_stream *stream)
+{
+ int ret = 0;
+end:
+ return ret;
+}
+
+static
+int init_stream_index(struct ctf_fs_stream *stream)
+{
+ int ret;
+
+ ret = build_index_from_idx_file(stream);
+ if (!ret) {
+ goto end;
+ }
+
+ ret = build_index_from_stream(stream);
+end:
+ return ret;
+}
+
BT_HIDDEN
struct ctf_fs_stream *ctf_fs_stream_create(
struct ctf_fs_component *ctf_fs, struct ctf_fs_file *file)
{
+ int ret;
struct ctf_fs_stream *stream = g_new0(struct ctf_fs_stream, 1);
if (!stream) {
}
stream->mmap_max_len = ctf_fs->page_size * 2048;
+ ret = init_stream_index(stream);
+ if (ret) {
+ goto error;
+ }
goto end;
error:
/* Do not touch "borrowed" file. */
bt_ctf_notif_iter_destroy(stream->notif_iter);
}
+ if (stream->index.entries) {
+ g_array_free(stream->index.entries, TRUE);
+ }
+
g_free(stream);
}
projects / babeltrace.git / blobdiff