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 Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Daniel P. Berrangé <berrange@redhat.com> --- 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, 26 insertions(+), 12 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 75e2fd310d..5f3b5436a6 100644 --- a/system/vl.c +++ b/system/vl.c @@ -823,7 +823,9 @@ 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); } @@ -3526,7 +3528,7 @@ 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 0c39857fc5..313c2d6055 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; /* * Print to current monitor if we have one, else to stderr. @@ -222,11 +220,6 @@ 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) { - fprintf(stderr, "%s ", error_guest_name); - } - print_loc(cur); switch (type) { diff --git a/util/message.c b/util/message.c index 99a403f9d0..fb2c947153 100644 --- a/util/message.c +++ b/util/message.c @@ -6,12 +6,18 @@ #include "monitor/monitor.h" static int message_format; +static char *message_workloadname; void qmessage_set_format(int flags) { message_format = flags; } +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) { @@ -20,4 +26,10 @@ void qmessage_context_print(FILE *fp) fputs(timestr, fp); fputc(' ', fp); } + + if ((message_format & QMESSAGE_FORMAT_WORKLOAD_NAME) && + message_workloadname) { + fputs(message_workloadname, fp); + fputc(' ', fp); + } } -- 2.52.0