linux-trace-devel.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: "Tzvetomir Stoyanov (VMware)" <tz.stoyanov@gmail.com>
To: rostedt@goodmis.org
Cc: linux-trace-devel@vger.kernel.org
Subject: [PATCH v2 05/21] trace-cmd library: Select the file version when writing trace file
Date: Mon, 10 May 2021 09:16:20 +0300	[thread overview]
Message-ID: <20210510061636.1794357-6-tz.stoyanov@gmail.com> (raw)
In-Reply-To: <20210510061636.1794357-1-tz.stoyanov@gmail.com>

When a new output handler to trace file is allocated, select the proper
file version. If this output handler is based on an existing input trace
file handler, inherit the trace file version.

Signed-off-by: Tzvetomir Stoyanov (VMware) <tz.stoyanov@gmail.com>
---
 lib/trace-cmd/trace-output.c | 19 ++++++++++++++++++-
 1 file changed, 18 insertions(+), 1 deletion(-)

diff --git a/lib/trace-cmd/trace-output.c b/lib/trace-cmd/trace-output.c
index c0aa58cf..3c30edc1 100644
--- a/lib/trace-cmd/trace-output.c
+++ b/lib/trace-cmd/trace-output.c
@@ -57,6 +57,7 @@ struct tracecmd_output {
 	int			nr_options;
 	bool			quiet;
 	unsigned long		file_state;
+	unsigned long		file_version;
 	struct list_head	options;
 	struct tracecmd_msg_handle *msg_handle;
 	char			*trace_clock;
@@ -907,6 +908,17 @@ out_free:
 	return ret;
 }
 
+static int select_file_version(struct tracecmd_output *handle,
+				struct tracecmd_input *ihandle)
+{
+	if (ihandle)
+		handle->file_version = tracecmd_get_file_version(ihandle);
+	else
+		handle->file_version = FILE_VERSION;
+
+	return 0;
+}
+
 static struct tracecmd_output *
 create_file_fd(int fd, struct tracecmd_input *ihandle,
 	       const char *tracing_dir,
@@ -933,6 +945,9 @@ create_file_fd(int fd, struct tracecmd_input *ihandle,
 
 	handle->msg_handle = msg_handle;
 
+	if (select_file_version(handle, ihandle))
+		goto out_free;
+
 	list_head_init(&handle->options);
 
 	buf[0] = 23;
@@ -943,7 +958,8 @@ create_file_fd(int fd, struct tracecmd_input *ihandle,
 	if (do_write_check(handle, buf, 10))
 		goto out_free;
 
-	if (do_write_check(handle, FILE_VERSION_STRING, strlen(FILE_VERSION_STRING) + 1))
+	sprintf(buf, "%lu", handle->file_version);
+	if (do_write_check(handle, buf, strlen(buf) + 1))
 		goto out_free;
 
 	/* get endian and page size */
@@ -1562,6 +1578,7 @@ struct tracecmd_output *tracecmd_get_output_handle_fd(int fd)
 	handle->pevent = tracecmd_get_tep(ihandle);
 	tep_ref(handle->pevent);
 	handle->page_size = tracecmd_page_size(ihandle);
+	handle->file_version = tracecmd_get_file_version(ihandle);
 	list_head_init(&handle->options);
 
 	tracecmd_close(ihandle);
-- 
2.31.1


  parent reply	other threads:[~2021-05-10  6:16 UTC|newest]

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-05-10  6:16 [PoC PATCH v2 00/21] Add trace file compression Tzvetomir Stoyanov (VMware)
2021-05-10  6:16 ` [PATCH v2 01/21] trace-cmd library: Remove unused private APIs for creating trace files Tzvetomir Stoyanov (VMware)
2021-05-10  6:16 ` [PATCH v2 02/21] trace-cmd library: Remove unused API tracecmd_update_option Tzvetomir Stoyanov (VMware)
2021-05-10  6:16 ` [PATCH v2 03/21] trace-cmd: Check if file version is supported Tzvetomir Stoyanov (VMware)
2021-05-10  6:16 ` [PATCH v2 04/21] trace-cmd library: Add new API to get file version of input handler Tzvetomir Stoyanov (VMware)
2021-05-10  6:16 ` Tzvetomir Stoyanov (VMware) [this message]
2021-05-10  6:16 ` [PATCH v2 06/21] trace-cmd: Add APIs for library initialization and free Tzvetomir Stoyanov (VMware)
2021-05-10  6:16 ` [PATCH v2 07/21] trace-cmd library: Add support for compression algorithms Tzvetomir Stoyanov (VMware)
2021-05-10  6:16 ` [PATCH v2 08/21] trace-cmd list: Show supported " Tzvetomir Stoyanov (VMware)
2021-05-10  6:16 ` [PATCH v2 09/21] trace-cmd library: Bump the trace file version to 7 Tzvetomir Stoyanov (VMware)
2021-05-10  6:16 ` [PATCH v2 10/21] trace-cmd library: Compress part of the trace file Tzvetomir Stoyanov (VMware)
2021-05-10  6:16 ` [PATCH v2 11/21] trace-cmd library: Read compressed " Tzvetomir Stoyanov (VMware)
2021-05-10  6:16 ` [PATCH v2 12/21] trace-cmd library: Add new API to get compression of input handler Tzvetomir Stoyanov (VMware)
2021-05-10  6:16 ` [PATCH v2 13/21] trace-cmd library: Inherit compression algorithm from input file Tzvetomir Stoyanov (VMware)
2021-05-10  6:16 ` [PATCH v2 14/21] trace-cmd library: Extend the create file APIs to support different compression Tzvetomir Stoyanov (VMware)
2021-05-10  6:16 ` [PATCH v2 15/21] trace-cmd record: Add new parameter --compression Tzvetomir Stoyanov (VMware)
2021-05-10  6:16 ` [PATCH v2 16/21] trace-cmd dump: Add support for trace files version 7 Tzvetomir Stoyanov (VMware)
2021-05-10  6:16 ` [PATCH v2 17/21] trace-cmd library: Add support for zlib compression library Tzvetomir Stoyanov (VMware)
2021-05-10  6:16 ` [PATCH v2 18/21] trace-cmd library: Hide the logic for updating buffer offset Tzvetomir Stoyanov (VMware)
2021-05-10  6:16 ` [PATCH v2 19/21] trace-cmd: Move buffers description outside of options Tzvetomir Stoyanov (VMware)
2021-05-10  6:16 ` [PATCH v2 20/21] trace-cmd library: Track the offset in the option section in the trace file Tzvetomir Stoyanov (VMware)
2021-05-10  6:16 ` [PATCH v2 21/21] trace-cmd library: Add compression of the option section of " Tzvetomir Stoyanov (VMware)

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20210510061636.1794357-6-tz.stoyanov@gmail.com \
    --to=tz.stoyanov@gmail.com \
    --cc=linux-trace-devel@vger.kernel.org \
    --cc=rostedt@goodmis.org \
    --subject='Re: [PATCH v2 05/21] trace-cmd library: Select the file version when writing trace file' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).