[ltt-dev] [BABELTRACE PATCH] Specify callback to move packet in open_trace
Mathieu Desnoyers
mathieu.desnoyers at efficios.com
Tue Sep 13 17:54:04 EDT 2011
* Julien Desfossez (julien.desfossez at polymtl.ca) wrote:
> 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>
you are on fire today! ;)
Merged, thanks!
Mathieu
> ---
> 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
>
--
Mathieu Desnoyers
Operating System Efficiency R&D Consultant
EfficiOS Inc.
http://www.efficios.com
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