[ltt-dev] [BABELTRACE PATCH] Specify callback to move packet in open_trace
Julien Desfossez
julien.desfossez at polymtl.ca
Tue Sep 13 17:27:02 EDT 2011
This patch adds a new parameter to open_trace to allow the user to
specify the function to call when babeltrace needs to switch packet.
This patch is a first step for the mmap reading code integration.
Signed-off-by: Julien Desfossez <julien.desfossez at polymtl.ca>
---
converter/babeltrace.c | 4 +-
formats/bt-dummy/bt-dummy.c | 4 ++-
formats/ctf-text/ctf-text.c | 8 +++++-
formats/ctf/ctf.c | 44 ++++++++++++++++++++++++++++++++-------
include/babeltrace/ctf/types.h | 2 +
include/babeltrace/format.h | 5 +++-
6 files changed, 53 insertions(+), 14 deletions(-)
diff --git a/converter/babeltrace.c b/converter/babeltrace.c
index 5c37242..a39c1c4 100644
--- a/converter/babeltrace.c
+++ b/converter/babeltrace.c
@@ -212,7 +212,7 @@ static int traverse_dir(const char *fpath, const struct stat *sb,
} else {
close(fd);
close(dirfd);
- td_read = fmt_read->open_trace(fpath, O_RDONLY);
+ td_read = fmt_read->open_trace(fpath, O_RDONLY, ctf_move_pos_slow);
if (!td_read) {
fprintf(stdout, "Error opening trace \"%s\" "
"for reading.\n\n", fpath);
@@ -290,7 +290,7 @@ int main(int argc, char **argv)
return 0;
}
- td_write = fmt_write->open_trace(opt_output_path, O_RDWR);
+ td_write = fmt_write->open_trace(opt_output_path, O_RDWR, NULL);
if (!td_write) {
fprintf(stdout, "Error opening trace \"%s\" for writing.\n\n",
opt_output_path ? : "<none>");
diff --git a/formats/bt-dummy/bt-dummy.c b/formats/bt-dummy/bt-dummy.c
index 41cfb74..0850abb 100644
--- a/formats/bt-dummy/bt-dummy.c
+++ b/formats/bt-dummy/bt-dummy.c
@@ -39,7 +39,9 @@ int bt_dummy_write_event(struct stream_pos *ppos,
}
static
-struct trace_descriptor *bt_dummy_open_trace(const char *path, int flags)
+struct trace_descriptor *bt_dummy_open_trace(const char *path, int flags,
+ void (*move_pos_slow)(struct ctf_stream_pos *pos, size_t offset,
+ int whence))
{
struct ctf_text_stream_pos *pos;
diff --git a/formats/ctf-text/ctf-text.c b/formats/ctf-text/ctf-text.c
index f1ddbaf..fa46a92 100644
--- a/formats/ctf-text/ctf-text.c
+++ b/formats/ctf-text/ctf-text.c
@@ -34,7 +34,9 @@
#include <unistd.h>
#include <stdlib.h>
-struct trace_descriptor *ctf_text_open_trace(const char *path, int flags);
+struct trace_descriptor *ctf_text_open_trace(const char *path, int flags,
+ void (*move_pos_slow)(struct ctf_stream_pos *pos, size_t offset,
+ int whence));
void ctf_text_close_trace(struct trace_descriptor *descriptor);
static
@@ -225,7 +227,9 @@ error:
}
-struct trace_descriptor *ctf_text_open_trace(const char *path, int flags)
+struct trace_descriptor *ctf_text_open_trace(const char *path, int flags,
+ void (*move_pos_slow)(struct ctf_stream_pos *pos, size_t offset,
+ int whence))
{
struct ctf_text_stream_pos *pos;
FILE *fp;
diff --git a/formats/ctf/ctf.c b/formats/ctf/ctf.c
index 0d1418c..93d13e8 100644
--- a/formats/ctf/ctf.c
+++ b/formats/ctf/ctf.c
@@ -55,7 +55,9 @@
extern int yydebug;
static
-struct trace_descriptor *ctf_open_trace(const char *path, int flags);
+struct trace_descriptor *ctf_open_trace(const char *path, int flags,
+ void (*move_pos_slow)(struct ctf_stream_pos *pos, size_t offset,
+ int whence));
static
void ctf_close_trace(struct trace_descriptor *descriptor);
@@ -609,7 +611,9 @@ int ctf_open_trace_metadata_stream_read(struct ctf_trace *td, FILE **fp,
}
static
-int ctf_open_trace_metadata_read(struct ctf_trace *td)
+int ctf_open_trace_metadata_read(struct ctf_trace *td,
+ void (*move_pos_slow)(struct ctf_stream_pos *pos, size_t offset,
+ int whence))
{
struct ctf_scanner *scanner;
struct ctf_file_stream *metadata_stream;
@@ -618,6 +622,15 @@ int ctf_open_trace_metadata_read(struct ctf_trace *td)
int ret = 0;
metadata_stream = g_new0(struct ctf_file_stream, 1);
+
+ if (move_pos_slow) {
+ metadata_stream->pos.move_pos_slow = move_pos_slow;
+ } else {
+ fprintf(stderr, "[error] move_pos_slow function undefined.\n");
+ ret = -1;
+ goto end_stream;
+ }
+
td->metadata = &metadata_stream->parent;
metadata_stream->pos.fd = openat(td->dirfd, "metadata", O_RDONLY);
if (metadata_stream->pos.fd < 0) {
@@ -1083,7 +1096,9 @@ error:
* description (metadata).
*/
static
-int ctf_open_file_stream_read(struct ctf_trace *td, const char *path, int flags)
+int ctf_open_file_stream_read(struct ctf_trace *td, const char *path, int flags,
+ void (*move_pos_slow)(struct ctf_stream_pos *pos, size_t offset,
+ int whence))
{
int ret;
struct ctf_file_stream *file_stream;
@@ -1092,6 +1107,15 @@ int ctf_open_file_stream_read(struct ctf_trace *td, const char *path, int flags)
if (ret < 0)
goto error;
file_stream = g_new0(struct ctf_file_stream, 1);
+
+ if (move_pos_slow) {
+ file_stream->pos.move_pos_slow = move_pos_slow;
+ } else {
+ fprintf(stderr, "[error] move_pos_slow function undefined.\n");
+ ret = -1;
+ goto error_def;
+ }
+
ctf_init_pos(&file_stream->pos, ret, flags);
ret = create_trace_definitions(td, &file_stream->parent);
if (ret)
@@ -1116,7 +1140,9 @@ error:
}
static
-int ctf_open_trace_read(struct ctf_trace *td, const char *path, int flags)
+int ctf_open_trace_read(struct ctf_trace *td, const char *path, int flags,
+ void (*move_pos_slow)(struct ctf_stream_pos *pos, size_t offset,
+ int whence))
{
int ret;
struct dirent *dirent;
@@ -1144,7 +1170,7 @@ int ctf_open_trace_read(struct ctf_trace *td, const char *path, int flags)
* Keep the metadata file separate.
*/
- ret = ctf_open_trace_metadata_read(td);
+ ret = ctf_open_trace_metadata_read(td, move_pos_slow);
if (ret) {
goto error_metadata;
}
@@ -1173,7 +1199,7 @@ int ctf_open_trace_read(struct ctf_trace *td, const char *path, int flags)
|| !strcmp(diriter->d_name, "..")
|| !strcmp(diriter->d_name, "metadata"))
continue;
- ret = ctf_open_file_stream_read(td, diriter->d_name, flags);
+ ret = ctf_open_file_stream_read(td, diriter->d_name, flags, move_pos_slow);
if (ret) {
fprintf(stdout, "[error] Open file stream error.\n");
goto readdir_error;
@@ -1194,7 +1220,9 @@ error:
}
static
-struct trace_descriptor *ctf_open_trace(const char *path, int flags)
+struct trace_descriptor *ctf_open_trace(const char *path, int flags,
+ void (*move_pos_slow)(struct ctf_stream_pos *pos, size_t offset,
+ int whence))
{
struct ctf_trace *td;
int ret;
@@ -1207,7 +1235,7 @@ struct trace_descriptor *ctf_open_trace(const char *path, int flags)
fprintf(stdout, "[error] Path missing for input CTF trace.\n");
goto error;
}
- ret = ctf_open_trace_read(td, path, flags);
+ ret = ctf_open_trace_read(td, path, flags, move_pos_slow);
if (ret)
goto error;
break;
diff --git a/include/babeltrace/ctf/types.h b/include/babeltrace/ctf/types.h
index 54fd846..60749a6 100644
--- a/include/babeltrace/ctf/types.h
+++ b/include/babeltrace/ctf/types.h
@@ -60,6 +60,8 @@ struct ctf_stream_pos {
char *base; /* mmap base address */
ssize_t offset; /* offset from base, in bits. EOF for end of file. */
size_t cur_index; /* current index in packet index */
+ void (*move_pos_slow)(struct ctf_stream_pos *pos, size_t offset,
+ int whence); /* function called to switch packet */
int dummy; /* dummy position, for length calculation */
struct bt_stream_callbacks *cb; /* Callbacks registered for iterator. */
diff --git a/include/babeltrace/format.h b/include/babeltrace/format.h
index c50b28d..1b45b4b 100644
--- a/include/babeltrace/format.h
+++ b/include/babeltrace/format.h
@@ -22,6 +22,7 @@
*/
#include <babeltrace/types.h>
+#include <babeltrace/ctf/types.h>
#include <stdint.h>
#include <stdio.h>
#include <glib.h>
@@ -33,7 +34,9 @@ struct trace_descriptor {
struct format {
GQuark name;
- struct trace_descriptor *(*open_trace)(const char *path, int flags);
+ struct trace_descriptor *(*open_trace)(const char *path, int flags,
+ void (*move_pos_slow)(struct ctf_stream_pos *pos, size_t offset,
+ int whence));
void (*close_trace)(struct trace_descriptor *descriptor);
};
--
1.7.5.4
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