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Re: [PATCH v2 2/6] Cleaned up flow of code in qemu_set_log(), to simplif
From: |
Alex Bennée |
Subject: |
Re: [PATCH v2 2/6] Cleaned up flow of code in qemu_set_log(), to simplify and clarify. |
Date: |
Mon, 18 Nov 2019 12:07:34 +0000 |
User-agent: |
mu4e 1.3.5; emacs 27.0.50 |
Robert Foley <address@hidden> writes:
> Also added some explanation of the reasoning behind the branches.
>
> Signed-off-by: Robert Foley <address@hidden>
Reviewed-by: Alex Bennée <address@hidden>
> ---
> v2
> - This is new in patch v2.
> ---
> util/log.c | 21 +++++++++++++++------
> 1 file changed, 15 insertions(+), 6 deletions(-)
>
> diff --git a/util/log.c b/util/log.c
> index 4316fe74ee..417d16ec66 100644
> --- a/util/log.c
> +++ b/util/log.c
> @@ -54,12 +54,25 @@ static bool log_uses_own_buffers;
> /* enable or disable low levels log */
> void qemu_set_log(int log_flags)
> {
> + bool need_to_open_file = false;
> qemu_loglevel = log_flags;
> #ifdef CONFIG_TRACE_LOG
> qemu_loglevel |= LOG_TRACE;
> #endif
> - if (!qemu_logfile &&
> - (is_daemonized() ? logfilename != NULL : qemu_loglevel)) {
> + /*
> + * In all cases we only log if qemu_loglevel is set.
> + * Also:
> + * If not daemonized we will always log either to stderr
> + * or to a file (if there is a logfilename).
> + * If we are daemonized,
> + * we will only log if there is a logfilename.
> + */
> + if (qemu_loglevel && (!is_daemonized() || logfilename)) {
> + need_to_open_file = true;
> + }
> + if (qemu_logfile && !need_to_open_file) {
> + qemu_log_close();
> + } else if (!qemu_logfile && need_to_open_file) {
> if (logfilename) {
> qemu_logfile = fopen(logfilename, log_append ? "a" : "w");
> if (!qemu_logfile) {
> @@ -93,10 +106,6 @@ void qemu_set_log(int log_flags)
> log_append = 1;
> }
> }
> - if (qemu_logfile &&
> - (is_daemonized() ? logfilename == NULL : !qemu_loglevel)) {
> - qemu_log_close();
> - }
> }
>
> void qemu_log_needs_buffers(void)
--
Alex Bennée
- [PATCH v2 0/6] Make the qemu_logfile handle thread safe., Robert Foley, 2019/11/15
- [PATCH v2 1/6] Fix double free issue in qemu_set_log_filename()., Robert Foley, 2019/11/15
- [PATCH v2 3/6] Add a mutex to guarantee single writer to qemu_logfile handle., Robert Foley, 2019/11/15
- [PATCH v2 2/6] Cleaned up flow of code in qemu_set_log(), to simplify and clarify., Robert Foley, 2019/11/15
- Re: [PATCH v2 2/6] Cleaned up flow of code in qemu_set_log(), to simplify and clarify.,
Alex Bennée <=
- [PATCH v2 4/6] qemu_log_lock/unlock now preserves the qemu_logfile handle., Robert Foley, 2019/11/15
- [PATCH v2 5/6] Add use of RCU for qemu_logfile., Robert Foley, 2019/11/15
- Re: [PATCH v2 5/6] Add use of RCU for qemu_logfile., Alex Bennée, 2019/11/18
- Re: [PATCH v2 5/6] Add use of RCU for qemu_logfile., Robert Foley, 2019/11/18
- Re: [PATCH v2 5/6] Add use of RCU for qemu_logfile., Alex Bennée, 2019/11/18
- Re: [PATCH v2 5/6] Add use of RCU for qemu_logfile., Robert Foley, 2019/11/18
- Re: [PATCH v2 5/6] Add use of RCU for qemu_logfile., Alex Bennée, 2019/11/18
- Re: [PATCH v2 5/6] Add use of RCU for qemu_logfile., Robert Foley, 2019/11/18
[PATCH v2 6/6] Added tests for close and change of logfile., Robert Foley, 2019/11/15