* Daniel P. Berrangé ([email protected]) wrote:
> The error_report function can include the guest name in any
> messages it prints. The qemu_log function has no equivalent
> behaviour.
>
> This introduces support for a "workload name" in the new
> messages API, which in the case of system emulators will
> be the guest name. The possibility of defining a workload
> name for other binaries is left as an exercise for the
> future.
>
> This change has no impact on the output of the error_report
> function, but will change the qemu_log function. This can
> be easily seen with the 'log' trace backend, and how it is
> now more closely matching error_report output.
>
> Before:
>
> # qemu-system-x86_64 -msg guest-name=on -name blah -object
> tls-creds-x509,id=t0,dir=fish -d 'trace:qcrypto*'
> qcrypto_tls_creds_x509_load TLS creds x509 load creds=0x55b3af3fd870
> dir=fish
> qcrypto_tls_creds_get_path TLS creds path creds=0x55b3af3fd870
> filename=ca-cert.pem path=<none>
> blah qemu-system-x86_64: Unable to access credentials fish/ca-cert.pem: No
> such file or directory
>
> After:
>
> # qemu-system-x86_64 -msg guest-name=on -name blah -object
> tls-creds-x509,id=t0,dir=fish -d 'trace:qcrypto*'
> blah qcrypto_tls_creds_x509_load TLS creds x509 load creds=0x55b3af3fd870
> dir=fish
> blah qcrypto_tls_creds_get_path TLS creds path creds=0x55b3af3fd870
> filename=ca-cert.pem path=<none>
> blah qemu-system-x86_64: Unable to access credentials fish/ca-cert.pem: No
> such file or directory
>
> Signed-off-by: Daniel P. Berrangé <[email protected]>
Are you going to want to escape that? I see later you're adding []'s around it,
which makes it feel like you want to end up with it parsable, but if some nasty
person does:
-name ']})🐧({['
then things get confusing; I guess you're hoping that whoever calls qemu will
be careful not to allow that.
Dave
> ---
> include/qemu/error-report.h | 3 ---
> include/qemu/message.h | 10 ++++++++++
> system/vl.c | 6 ++++--
> util/error-report.c | 7 -------
> util/message.c | 12 +++++++++++-
> 5 files changed, 25 insertions(+), 13 deletions(-)
>
> diff --git a/include/qemu/error-report.h b/include/qemu/error-report.h
> index c8000778ec..ffc305f828 100644
> --- a/include/qemu/error-report.h
> +++ b/include/qemu/error-report.h
> @@ -70,7 +70,4 @@ void error_init(const char *argv0);
> fmt, ##__VA_ARGS__); \
> })
>
> -extern bool error_with_guestname;
> -extern const char *error_guest_name;
> -
> #endif
> diff --git a/include/qemu/message.h b/include/qemu/message.h
> index 0a06421f77..cfc3c92648 100644
> --- a/include/qemu/message.h
> +++ b/include/qemu/message.h
> @@ -5,6 +5,7 @@
>
> enum QMessageFormatFlags {
> QMESSAGE_FORMAT_TIMESTAMP = (1 << 0),
> + QMESSAGE_FORMAT_WORKLOAD_NAME = (1 << 1),
> };
>
> /**
> @@ -16,6 +17,15 @@ enum QMessageFormatFlags {
> */
> void qmessage_set_format(int flags);
>
> +/**
> + * qmessage_set_workload_name:
> + * @name: the name of the workload
> + *
> + * Set the workload name, which for a system emulator
> + * will be the guest VM name.
> + */
> +void qmessage_set_workload_name(const char *name);
> +
> /**
> * qmessage_context_print:
> * @fp: file to emit the prefix on
> diff --git a/system/vl.c b/system/vl.c
> index 696dd92669..fee6fdf7b1 100644
> --- a/system/vl.c
> +++ b/system/vl.c
> @@ -818,7 +818,9 @@ static void configure_msg(QemuOpts *opts)
> if (qemu_opt_get_bool(opts, "timestamp", false)) {
> flags |= QMESSAGE_FORMAT_TIMESTAMP;
> }
> - error_with_guestname = qemu_opt_get_bool(opts, "guest-name", false);
> + if (qemu_opt_get_bool(opts, "guest-name", false)) {
> + flags |= QMESSAGE_FORMAT_WORKLOAD_NAME;
> + }
> qmessage_set_format(flags);
> }
>
> @@ -3520,7 +3522,7 @@ void qemu_init(int argc, char **argv)
> exit(1);
> }
> /* Capture guest name if -msg guest-name is used later */
> - error_guest_name = qemu_opt_get(opts, "guest");
> + qmessage_set_workload_name(qemu_opt_get(opts, "guest"));
> break;
> case QEMU_OPTION_prom_env:
> if (nb_prom_envs >= MAX_PROM_ENVS) {
> diff --git a/util/error-report.c b/util/error-report.c
> index 719f059494..c40cdf3bb3 100644
> --- a/util/error-report.c
> +++ b/util/error-report.c
> @@ -25,8 +25,6 @@ typedef enum {
> REPORT_TYPE_INFO,
> } report_type;
>
> -bool error_with_guestname;
> -const char *error_guest_name;
>
> typedef void (*error_print_func)(void *opaque, const char *fmt, ...);
> typedef void (*error_print_vfunc)(void *opaque, const char *fmt, va_list ap);
> @@ -218,11 +216,6 @@ static void vreport(report_type type, const char *fmt,
> va_list ap)
> qmessage_context_print(stderr);
> }
>
> - /* Only prepend guest name if -msg guest-name and -name guest=... are
> set */
> - if (error_with_guestname && error_guest_name && !cur) {
> - print_func(print_opaque, "%s ", error_guest_name);
> - }
> -
> print_loc(!!cur, print_func, print_opaque);
>
> switch (type) {
> diff --git a/util/message.c b/util/message.c
> index ef70e08c5f..a91c008e08 100644
> --- a/util/message.c
> +++ b/util/message.c
> @@ -6,18 +6,28 @@
> #include "monitor/monitor.h"
>
> static int message_format;
> +static char *message_workloadname;
>
> void qmessage_set_format(int flags)
> {
> message_format = flags;
> }
>
> -void qmessage_context_print(FILE *fp)
> +void qmessage_set_workload_name(const char *name)
> {
> + message_workloadname = g_strdup(name);
> +}
>
> +void qmessage_context_print(FILE *fp)
> +{
> if (message_format & QMESSAGE_FORMAT_TIMESTAMP) {
> g_autoptr(GDateTime) dt = g_date_time_new_now_utc();
> g_autofree char *timestr = g_date_time_format_iso8601(dt);
> fprintf(fp, "%s ", timestr);
> }
> +
> + if ((message_format & QMESSAGE_FORMAT_WORKLOAD_NAME) &&
> + message_workloadname) {
> + fprintf(fp, "%s ", message_workloadname);
> + }
> }
> --
> 2.50.1
>
--
-----Open up your eyes, open up your mind, open up your code -------
/ Dr. David Alan Gilbert | Running GNU/Linux | Happy \
\ dave @ treblig.org | | In Hex /
\ _________________________|_____ http://www.treblig.org |_______/
