From: Fabio Fantoni <fabio.fantoni@m2r.biz>
To: Jan Beulich <JBeulich@suse.com>,
xen-devel <xen-devel@lists.xenproject.org>
Cc: Wei Liu <wei.liu2@citrix.com>,
Ian Jackson <Ian.Jackson@eu.citrix.com>,
Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Subject: Re: [PATCH v2 3/3] xl: new "loglvl" command
Date: Mon, 7 Mar 2016 14:20:56 +0100 [thread overview]
Message-ID: <56DD8038.2000104@m2r.biz> (raw)
In-Reply-To: <56D9CA6002000078000D9935@prv-mh.provo.novell.com>
Il 04/03/2016 17:48, Jan Beulich ha scritto:
> This is pretty simplistic for now, but I'd rather have someone better
> friends with the tools improve it (if desired).
>
> Signed-off-by: Jan Beulich <jbeulich@suse.com>
>
> --- a/tools/libxl/libxl.c
> +++ b/tools/libxl/libxl.c
> @@ -5958,6 +5958,26 @@ int libxl_send_debug_keys(libxl_ctx *ctx
> return 0;
> }
>
> +int libxl_log_level(libxl_ctx *ctx, bool set, bool guest,
> + int *lower_thresh, int *upper_thresh)
> +{
> + int ret;
> + GC_INIT(ctx);
> + if (set) {
> + ret = xc_set_log_level(ctx->xch, guest, *lower_thresh, *upper_thresh);
> + } else {
> + ret = xc_get_log_level(ctx->xch, guest, lower_thresh, upper_thresh);
> + }
> + if ( ret < 0 ) {
> + LOGE(ERROR, "%s %slog level",
> + set ? "setting" : "getting", guest ? "guest " : "");
> + GC_FREE;
> + return ERROR_FAIL;
> + }
> + GC_FREE;
> + return 0;
> +}
> +
> libxl_xen_console_reader *
> libxl_xen_console_read_start(libxl_ctx *ctx, int clear)
> {
> --- a/tools/libxl/libxl.h
> +++ b/tools/libxl/libxl.h
> @@ -1765,6 +1765,8 @@ int libxl_send_trigger(libxl_ctx *ctx, u
> libxl_trigger trigger, uint32_t vcpuid);
> int libxl_send_sysrq(libxl_ctx *ctx, uint32_t domid, char sysrq);
> int libxl_send_debug_keys(libxl_ctx *ctx, char *keys);
> +int libxl_log_level(libxl_ctx *ctx, bool set, bool guest,
> + int *lower_thresh, int *upper_thresh);
>
> typedef struct libxl__xen_console_reader libxl_xen_console_reader;
>
> --- a/tools/libxl/xl.h
> +++ b/tools/libxl/xl.h
> @@ -81,6 +81,7 @@ int main_trigger(int argc, char **argv);
> int main_sysrq(int argc, char **argv);
> int main_debug_keys(int argc, char **argv);
> int main_dmesg(int argc, char **argv);
> +int main_loglvl(int argc, char **argv);
> int main_top(int argc, char **argv);
> int main_networkattach(int argc, char **argv);
> int main_networklist(int argc, char **argv);
> @@ -209,6 +210,8 @@ extern void printf_info_sexp(int domid,
> #define XL_GLOBAL_CONFIG XEN_CONFIG_DIR "/xl.conf"
> #define XL_LOCK_FILE XEN_LOCK_DIR "/xl"
>
> +#define ARRAY_SIZE(a) (sizeof(a) / sizeof(a[0]))
> +
> #endif /* XL_H */
>
> /*
> --- a/tools/libxl/xl_cmdimpl.c
> +++ b/tools/libxl/xl_cmdimpl.c
> @@ -6469,6 +6469,84 @@ int main_debug_keys(int argc, char **arg
> return 0;
> }
>
> +static const struct {
> + int level;
> + char string[8];
> +} loglvls[] = {
> + { 0, "none" },
> + { 1, "error" },
> + { 2, "warning" },
> + { 3, "info" },
> + { 4, "all" },
> + { 4, "debug" },
> +};
double "4" for both all and debug seems strange to me, is it right?
> +
> +static int parse_loglvl(char **parg)
> +{
> + unsigned int i;
> +
> + for (i = 0; i < ARRAY_SIZE(loglvls); ++i) {
> + size_t l = strlen(loglvls[i].string);
> +
> + if (!strncmp(*parg, loglvls[i].string, l)) {
> + *parg += l;
> + return loglvls[i].level;
> + }
> + }
> +
> + return -1;
> +}
> +
> +static const char *format_loglvl(int loglvl)
> +{
> + unsigned int i;
> +
> + for (i = 0; i < ARRAY_SIZE(loglvls); ++i) {
> + if (loglvl == loglvls[i].level)
> + return loglvls[i].string;
> + }
> +
> + return "<unknown>";
> +}
> +
> +int main_loglvl(int argc, char **argv)
> +{
> + static const struct option opts[] = {
> + {"guest", 0, 0, 'g'},
> + {"set", 0, 0, 's'},
> + COMMON_LONG_OPTS
> + };
> + int opt, lower_thresh = -1, upper_thresh = -1;
> + bool guest = false, set = false;
> +
> + SWITCH_FOREACH_OPT(opt, "gs:", opts, "loglvl", 0) {
> + case 'g':
> + guest = true;
> + break;
> + case 's':
> + if (*optarg != '/')
> + lower_thresh = parse_loglvl(&optarg);
> + if (*optarg == '/') {
> + ++optarg;
> + upper_thresh = parse_loglvl(&optarg);
> + }
> + set = true;
> + break;
> + }
> +
> + if (libxl_log_level(ctx, set, guest, &lower_thresh, &upper_thresh)) {
> + fprintf(stderr, "cannot %s %s log level\n",
> + set ? "set" : "get", guest ? "guest" : "host");
> + return 1;
> + }
> +
> + if (!set)
> + printf("%s log levels: %s/%s\n", guest ? "guest" : "host",
> + format_loglvl(lower_thresh), format_loglvl(upper_thresh));
> +
> + return 0;
> +}
> +
> int main_dmesg(int argc, char **argv)
> {
> unsigned int clear = 0;
> --- a/tools/libxl/xl_cmdtable.c
> +++ b/tools/libxl/xl_cmdtable.c
> @@ -309,6 +309,13 @@ struct cmd_spec cmd_table[] = {
> "[-c]",
> " -c Clear dmesg buffer as well as printing it",
> },
> + { "loglvl",
> + &main_loglvl, 0, 1,
> + "Manage Xen log levels",
> + "[-g] [-s=[LOWER][/UPPER]]",
> + "-g, --guest act on guest log level\n"
> + "-s [LOWER][/UPPER], --set=[LOWER][/UPPER] set new log level\n"
> + },
> { "top",
> &main_top, 0, 0,
> "Monitor a host and the domains in real time",
>
>
>
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next prev parent reply other threads:[~2016-03-07 13:19 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-03-04 16:38 [PATCH v2 0/3] allow runtime log level threshold adjustments Jan Beulich
2016-03-04 16:46 ` [PATCH v2 1/3] console: allow " Jan Beulich
2016-03-04 20:55 ` Konrad Rzeszutek Wilk
2016-03-07 10:44 ` Jan Beulich
2016-03-07 14:41 ` Konrad Rzeszutek Wilk
2016-03-07 15:19 ` Jan Beulich
2016-03-04 16:47 ` [PATCH v2 2/3] libxc: wrapper for log level sysctl Jan Beulich
2016-03-05 16:00 ` Dario Faggioli
2016-03-08 16:20 ` Wei Liu
2016-03-04 16:48 ` [PATCH v2 3/3] xl: new "loglvl" command Jan Beulich
2016-03-04 18:45 ` Dario Faggioli
2016-03-07 11:46 ` Jan Beulich
2016-03-07 18:07 ` Dario Faggioli
2016-03-08 8:08 ` Jan Beulich
2016-03-08 14:05 ` George Dunlap
2016-03-08 16:09 ` Wei Liu
2016-03-08 18:05 ` Dario Faggioli
2016-03-05 15:36 ` Dario Faggioli
2016-03-07 13:20 ` Fabio Fantoni [this message]
2016-03-07 13:26 ` Jan Beulich
2016-03-08 16:20 ` Wei Liu
2016-03-14 15:23 ` Jan Beulich
2016-03-14 15:36 ` Wei Liu
2016-03-14 15:49 ` Jan Beulich
2016-03-14 16:01 ` Wei Liu
2016-03-14 17:00 ` Jan Beulich
2016-03-14 17:07 ` Ian Jackson
2016-03-15 7:37 ` Jan Beulich
2016-03-15 13:58 ` Wei Liu
2016-03-15 14:07 ` Jan Beulich
2016-03-15 14:51 ` Wei Liu
2016-03-15 15:03 ` Jan Beulich
2016-03-15 15:38 ` Ian Jackson
2016-03-16 11:22 ` Jan Beulich
2016-04-28 15:33 ` Wei Liu
2016-04-29 7:20 ` Jan Beulich
2016-05-02 11:14 ` Wei Liu
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