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From: "Tzvetomir Stoyanov (VMware)" <tz.stoyanov@gmail.com>
To: rostedt@goodmis.org
Cc: linux-trace-devel@vger.kernel.org
Subject: [PATCH v5 35/40] trace-cmd: Copy options in tracecmd_copy
Date: Thu, 10 Jun 2021 14:34:21 +0300	[thread overview]
Message-ID: <20210610113426.257931-36-tz.stoyanov@gmail.com> (raw)
In-Reply-To: <20210610113426.257931-1-tz.stoyanov@gmail.com>

Extend the tracecmd_copy() API to support copying of trace options
section from input to output trace handler.

Signed-off-by: Tzvetomir Stoyanov (VMware) <tz.stoyanov@gmail.com>
---
 .../include/private/trace-cmd-private.h       |  2 +
 lib/trace-cmd/include/trace-cmd-local.h       |  1 +
 lib/trace-cmd/trace-input.c                   | 80 +++++++++++++++++++
 lib/trace-cmd/trace-output.c                  |  8 ++
 4 files changed, 91 insertions(+)

diff --git a/lib/trace-cmd/include/private/trace-cmd-private.h b/lib/trace-cmd/include/private/trace-cmd-private.h
index 3735586d..595ba688 100644
--- a/lib/trace-cmd/include/private/trace-cmd-private.h
+++ b/lib/trace-cmd/include/private/trace-cmd-private.h
@@ -176,6 +176,8 @@ int tracecmd_copy_headers(struct tracecmd_input *in_handle,
 			  enum tracecmd_file_states end_state);
 int tracecmd_copy_buffer_descr(struct tracecmd_input *in_handle,
 			       struct tracecmd_output *out_handle);
+int tracecmd_copy_options(struct tracecmd_input *in_handle,
+			  struct tracecmd_output *out_handle);
 void tracecmd_set_flag(struct tracecmd_input *handle, int flag);
 void tracecmd_clear_flag(struct tracecmd_input *handle, int flag);
 unsigned long tracecmd_get_flags(struct tracecmd_input *handle);
diff --git a/lib/trace-cmd/include/trace-cmd-local.h b/lib/trace-cmd/include/trace-cmd-local.h
index 135f52f3..628af16d 100644
--- a/lib/trace-cmd/include/trace-cmd-local.h
+++ b/lib/trace-cmd/include/trace-cmd-local.h
@@ -52,6 +52,7 @@ void in_uncompress_reset(struct tracecmd_input *handle);
 int in_uncompress_block(struct tracecmd_input *handle);
 
 void out_set_file_state(struct tracecmd_output *handle, int new_state);
+void out_save_options_offset(struct tracecmd_output *handle);
 
 int write_buffers_description_v7(struct tracecmd_output *handle);
 int write_buffers_description_v6(struct tracecmd_output *handle);
diff --git a/lib/trace-cmd/trace-input.c b/lib/trace-cmd/trace-input.c
index 7d0a41c2..794f8ea3 100644
--- a/lib/trace-cmd/trace-input.c
+++ b/lib/trace-cmd/trace-input.c
@@ -4211,6 +4211,86 @@ int tracecmd_copy_buffer_descr(struct tracecmd_input *in_handle,
 	return tracecmd_write_buffers_description(out_handle);
 }
 
+static int copy_options(struct tracecmd_input *in_handle, struct tracecmd_output *out_handle)
+{
+	unsigned short option;
+	unsigned short en2;
+	unsigned int size;
+	unsigned int en4;
+
+	if (in_uncompress_block(in_handle))
+		return -1;
+	out_save_options_offset(out_handle);
+	out_compression_start(out_handle);
+	for (;;) {
+		if (do_read_check(in_handle, &option, 2))
+			goto error;
+		en2 = tep_read_number(in_handle->pevent, &option, 2);
+		if (en2 == TRACECMD_OPTION_DONE)
+			break;
+		/* next 4 bytes is the size of the option */
+		if (do_read_check(in_handle, &size, 4))
+			goto error;
+		en4 = tep_read_number(in_handle->pevent, &size, 4);
+		/* Do not copy buffers description, as there is a file specific offset */
+		if (en2 == TRACECMD_OPTION_BUFFER) {
+			/* Skip the option */
+			do_lseek(in_handle, en4, SEEK_CUR);
+			continue;
+		}
+
+		if (do_write_check(out_handle, &option, 2))
+			goto error;
+		if (do_write_check(out_handle, &size, 4))
+			goto error;
+		if (read_copy_data(in_handle, en4, out_handle))
+			goto error;
+	}
+	if (do_write_check(out_handle, &option, 2))
+		goto error;
+	in_uncompress_reset(in_handle);
+	if (out_compression_end(out_handle))
+		goto error;
+	in_handle->file_state = TRACECMD_FILE_OPTIONS;
+	out_set_file_state(out_handle, in_handle->file_state);
+	/* Append local options */
+	return tracecmd_append_options(out_handle);
+error:
+	out_compression_reset(out_handle);
+	in_uncompress_reset(in_handle);
+	return 0;
+}
+
+int tracecmd_copy_options(struct tracecmd_input *in_handle,
+			  struct tracecmd_output *out_handle)
+{
+	off64_t offset;
+	char buf[10];
+
+	if (!check_in_state(in_handle, TRACECMD_FILE_OPTIONS) ||
+	    !check_out_state(out_handle, TRACECMD_FILE_OPTIONS))
+		return -1;
+
+	/* Save where we currently are */
+	offset = lseek64(in_handle->fd, 0, SEEK_CUR);
+
+	if (do_read_check(in_handle, buf, 10))
+		return -1;
+	/* check if this handles options */
+	if (strncmp(buf, "options", 7) == 0) {
+		if (do_write_check(out_handle, "options  ", 10))
+			return -1;
+		if (copy_options(in_handle, out_handle) < 0)
+			return -1;
+	} else {
+		if (lseek64(in_handle->fd, offset, SEEK_SET) == (off_t)-1)
+			return -1;
+		in_handle->file_state = TRACECMD_FILE_OPTIONS;
+		out_set_file_state(out_handle, in_handle->file_state);
+	}
+	return 0;
+}
+
 /**
  * tracecmd_record_at_buffer_start - return true if record is first on subbuffer
  * @handle: input handle for the trace.dat file
diff --git a/lib/trace-cmd/trace-output.c b/lib/trace-cmd/trace-output.c
index 960d9a44..cbe641fd 100644
--- a/lib/trace-cmd/trace-output.c
+++ b/lib/trace-cmd/trace-output.c
@@ -1955,6 +1955,9 @@ struct tracecmd_output *tracecmd_copy(struct tracecmd_input *ihandle, const char
 	if (state >= TRACECMD_FILE_BUFERS &&
 	    tracecmd_copy_buffer_descr(ihandle, handle) < 0)
 		goto out_free;
+	if (state >= TRACECMD_FILE_OPTIONS &&
+	    tracecmd_copy_options(ihandle, handle) < 0)
+		goto out_free;
 
 	/* The file is all ready to have cpu data attached */
 	return handle;
@@ -1974,6 +1977,11 @@ __hidden bool check_out_state(struct tracecmd_output *handle, int new_state)
 	return check_file_state(handle->file_version, handle->file_state, new_state);
 }
 
+__hidden void out_save_options_offset(struct tracecmd_output *handle)
+{
+	handle->options_start = lseek64(handle->fd, 0, SEEK_CUR);
+}
+
 /**
  * tracecmd_get_out_file_version - return the trace.dat file version
  * @handle: output handle for the trace.dat file
-- 
2.31.1


  parent reply	other threads:[~2021-06-10 11:35 UTC|newest]

Thread overview: 44+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-06-10 11:33 [PATCH v5 00/40] Add trace file compression Tzvetomir Stoyanov (VMware)
2021-06-10 11:33 ` [PATCH v5 01/40] trace-cmd library: Remove unused private APIs for creating trace files Tzvetomir Stoyanov (VMware)
2021-06-10 11:33 ` [PATCH v5 02/40] trace-cmd library: Remove unused API tracecmd_update_option Tzvetomir Stoyanov (VMware)
2021-06-10 11:33 ` [PATCH v5 03/40] trace-cmd: Check if file version is supported Tzvetomir Stoyanov (VMware)
2021-06-10 11:33 ` [PATCH v5 04/40] trace-cmd library: Add new API to get file version of input handler Tzvetomir Stoyanov (VMware)
2021-06-10 11:33 ` [PATCH v5 05/40] trace-cmd library: Select the file version when writing trace file Tzvetomir Stoyanov (VMware)
2021-06-10 11:33 ` [PATCH v5 06/40] trace-cmd: Add APIs for library initialization and free Tzvetomir Stoyanov (VMware)
2021-06-22  1:27   ` Steven Rostedt
2021-06-22  6:41     ` Tzvetomir Stoyanov
2021-06-22 13:21       ` Steven Rostedt
2021-06-10 11:33 ` [PATCH v5 07/40] trace-cmd library: Add support for compression algorithms Tzvetomir Stoyanov (VMware)
2021-06-10 11:33 ` [PATCH v5 08/40] trace-cmd list: Show supported " Tzvetomir Stoyanov (VMware)
2021-06-10 11:33 ` [PATCH v5 09/40] trace-cmd library: Bump the trace file version to 7 Tzvetomir Stoyanov (VMware)
2021-06-10 11:33 ` [PATCH v5 10/40] trace-cmd library: Compress part of the trace file Tzvetomir Stoyanov (VMware)
2021-06-10 11:33 ` [PATCH v5 11/40] trace-cmd library: Read compressed " Tzvetomir Stoyanov (VMware)
2021-06-10 11:33 ` [PATCH v5 12/40] trace-cmd library: Add new API to get compression of input handler Tzvetomir Stoyanov (VMware)
2021-06-10 11:33 ` [PATCH v5 13/40] trace-cmd library: Inherit compression algorithm from input file Tzvetomir Stoyanov (VMware)
2021-06-10 11:34 ` [PATCH v5 14/40] trace-cmd library: Extend the create file APIs to support different compression Tzvetomir Stoyanov (VMware)
2021-06-10 11:34 ` [PATCH v5 15/40] trace-cmd record: Add new parameter --compression Tzvetomir Stoyanov (VMware)
2021-06-10 11:34 ` [PATCH v5 16/40] trace-cmd dump: Add support for trace files version 7 Tzvetomir Stoyanov (VMware)
2021-06-10 11:34 ` [PATCH v5 17/40] trace-cmd library: Add support for zlib compression library Tzvetomir Stoyanov (VMware)
2021-06-10 11:34 ` [PATCH v5 18/40] trace-cmd library: Hide the logic for updating buffer offset Tzvetomir Stoyanov (VMware)
2021-06-10 11:34 ` [PATCH v5 19/40] trace-cmd: Move buffers description outside of options Tzvetomir Stoyanov (VMware)
2021-06-10 11:34 ` [PATCH v5 20/40] trace-cmd library: Track the offset in the option section in the trace file Tzvetomir Stoyanov (VMware)
2021-06-10 11:34 ` [PATCH v5 21/40] trace-cmd library: Add compression of the option section of " Tzvetomir Stoyanov (VMware)
2021-06-10 11:34 ` [PATCH v5 22/40] trace-cmd library: Refactor the logic for writing trace data in the file Tzvetomir Stoyanov (VMware)
2021-06-10 11:34 ` [PATCH v5 23/40] trace-cmd library: Add APIs for read and write compressed data in chunks Tzvetomir Stoyanov (VMware)
2021-06-10 11:34 ` [PATCH v5 24/40] trace-cmd: Compress trace data Tzvetomir Stoyanov (VMware)
2021-06-10 11:34 ` [PATCH v5 25/40] trace-cmd: Read compressed " Tzvetomir Stoyanov (VMware)
2021-06-10 11:34 ` [PATCH v5 26/40] trace-cmd library: Compress latency " Tzvetomir Stoyanov (VMware)
2021-06-10 11:34 ` [PATCH v5 27/40] trace-cmd: Read compressed " Tzvetomir Stoyanov (VMware)
2021-06-10 11:34 ` [PATCH v5 28/40] trace-cmd library: Reuse within the library the function that checks file state Tzvetomir Stoyanov (VMware)
2021-06-10 11:34 ` [PATCH v5 29/40] trace-cmd library: Make tracecmd_copy_headers() to work with output handler Tzvetomir Stoyanov (VMware)
2021-06-10 11:34 ` [PATCH v5 30/40] trace-cmd: Do not use trace file compression with streams Tzvetomir Stoyanov (VMware)
2021-06-10 11:34 ` [PATCH v5 31/40] trace-cmd library: Add new API to get file version of output handler Tzvetomir Stoyanov (VMware)
2021-06-10 11:34 ` [PATCH v5 32/40] trace-cmd: Add file state parameter to tracecmd_copy Tzvetomir Stoyanov (VMware)
2021-06-10 11:34 ` [PATCH v5 33/40] trace-cmd: Copy CPU count in tracecmd_copy Tzvetomir Stoyanov (VMware)
2021-06-10 11:34 ` [PATCH v5 34/40] trace-cmd: Copy buffers description " Tzvetomir Stoyanov (VMware)
2021-06-10 11:34 ` Tzvetomir Stoyanov (VMware) [this message]
2021-06-10 11:34 ` [PATCH v5 36/40] trace-cmd library: Refactor the logic for writing CPU trace data Tzvetomir Stoyanov (VMware)
2021-06-10 11:34 ` [PATCH v5 37/40] trace-cmd library: Refactor the logic for writing CPU instance " Tzvetomir Stoyanov (VMware)
2021-06-10 11:34 ` [PATCH v5 38/40] trace-cmd: Copy trace data in tracecmd_copy Tzvetomir Stoyanov (VMware)
2021-06-10 11:34 ` [PATCH v5 39/40] trace-cmd: Add compression parameter to tracecmd_copy Tzvetomir Stoyanov (VMware)
2021-06-10 11:34 ` [PATCH v5 40/40] trace-cmd: Add new command "trace-cmd convert" Tzvetomir Stoyanov (VMware)

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