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| From: | Wenchao Xia |
| Subject: | Re: [Qemu-devel] [PATCH 2/3] HMP: pass in parameter for info sub command |
| Date: | Thu, 20 Dec 2012 11:02:16 +0800 |
| User-agent: | Mozilla/5.0 (Windows NT 5.1; rv:16.0) Gecko/20121026 Thunderbird/16.0.2 |
> On Wed, 19 Dec 2012 18:17:09 +0800
Wenchao Xia <address@hidden> wrote:This patch enable sub info command handler getting meaningful parameter. Signed-off-by: Wenchao Xia <address@hidden> --- hmp-commands.hx | 2 +- monitor.c | 79 +++++++++++++++++++++++++++++++++++++++---------------- 2 files changed, 57 insertions(+), 24 deletions(-) diff --git a/hmp-commands.hx b/hmp-commands.hx index 010b8c9..667fab8 100644 --- a/hmp-commands.hx +++ b/hmp-commands.hx @@ -1486,7 +1486,7 @@ ETEXI { .name = "info", - .args_type = "item:s?", + .args_type = "item:S?", .params = "[subcommand]", .help = "show various information about the system state", .mhandler.cmd = do_info, diff --git a/monitor.c b/monitor.c index 797680f..ce0e74d 100644 --- a/monitor.c +++ b/monitor.c @@ -464,6 +464,11 @@ QEMU_BUILD_BUG_ON(ARRAY_SIZE(monitor_event_names) != QEVENT_MAX) MonitorEventState monitor_event_state[QEVENT_MAX]; QemuMutex monitor_event_state_lock; +static const mon_cmd_t *monitor_parse_command(Monitor *mon, + const char *cmdline, + const mon_cmd_t *table, + QDict *qdict);Please, move the function instead.
There will be a bit big of code moving then, hope you would be OK with it.
+ /* * Emits the event to every monitor instance */ @@ -809,26 +814,29 @@ static void user_async_cmd_handler(Monitor *mon, const mon_cmd_t *cmd, static void do_info(Monitor *mon, const QDict *qdict) { const mon_cmd_t *cmd; + QDict *qdict_info; const char *item = qdict_get_try_str(qdict, "item"); if (!item) { goto help; } - for (cmd = info_cmds; cmd->name != NULL; cmd++) { - if (compare_cmd(item, cmd->name)) - break; - } + qdict_info = qdict_new(); - if (cmd->name == NULL) { - goto help; + cmd = monitor_parse_command(mon, item, info_cmds, qdict_info); + if (!cmd) { + QDECREF(qdict_info); + /* don't help here, to avoid error message got ignored */ + return; } - cmd->mhandler.info(mon, NULL); + cmd->mhandler.info(mon, qdict_info); + QDECREF(qdict_info); return; help: help_cmd(mon, "info"); + return; } CommandInfoList *qmp_query_commands(Error **errp) @@ -3534,18 +3542,15 @@ static const mon_cmd_t *search_dispatch_table(const mon_cmd_t *disp_table, return NULL; } -static const mon_cmd_t *monitor_find_command(const char *cmdname) +static const mon_cmd_t *monitor_find_command(const char *cmdname, + const mon_cmd_t *table) { - return search_dispatch_table(mon_cmds, cmdname); -} - -static const mon_cmd_t *qmp_find_cmd(const char *cmdname) -{ - return search_dispatch_table(qmp_cmds, cmdname); + return search_dispatch_table(table, cmdname);Please, keep only search_dispatch_table().
OK.
Actually, maybe you could change handle_qmp_command() to just loop through command names and compare them with memcpy() (in a different patch, please) then you keep monitor_find_command() for handle_hmp_command().
ah, then monitor_find_command() serve HMP only. How about rename it to hmp_find_command(table, name)? This can have a more clear meaning. Or just remove this funtion but use search_dispatch_table() every where?
} static const mon_cmd_t *monitor_parse_command(Monitor *mon, const char *cmdline, + const mon_cmd_t *table, QDict *qdict) { const char *p, *typestr; @@ -3564,7 +3569,7 @@ static const mon_cmd_t *monitor_parse_command(Monitor *mon, if (!p) return NULL; - cmd = monitor_find_command(cmdname); + cmd = monitor_find_command(cmdname, table); if (!cmd) { monitor_printf(mon, "unknown command: '%s'\n", cmdname); return NULL; @@ -3872,6 +3877,31 @@ static const mon_cmd_t *monitor_parse_command(Monitor *mon, } } break; + case 'S': + { + /* package all remaining string */ + int len; + + while (qemu_isspace(*p)) { + p++; + } + if (*typestr == '?') { + typestr++; + if (*p == '\0') { + /* no remaining string: NULL argument */ + break; + } + } + len = strlen(p); + if (len <= 0) { + monitor_printf(mon, "%s: string expected\n", + cmdname); + break; + } + qdict_put(qdict, key, qstring_from_str(p)); + p += len; + }This is a true HMP-style hack :) I don't know how to make this better though (at least not without asking you to re-write the whole thing). Maybe Markus has a better idea?
My idea was adding a new tag meaning "package all remaining string into the key value", what was I can found best before. Hope you have a better solution.
+ break; default: bad_type: monitor_printf(mon, "%s: unknown type '%c'\n", cmdname, c); @@ -3925,7 +3955,7 @@ static void handle_user_command(Monitor *mon, const char *cmdline) qdict = qdict_new(); - cmd = monitor_parse_command(mon, cmdline, qdict); + cmd = monitor_parse_command(mon, cmdline, mon_cmds, qdict); if (!cmd) goto out; @@ -4144,12 +4174,7 @@ static void monitor_find_completion(const char *cmdline) break; case 's': /* XXX: more generic ? */ - if (!strcmp(cmd->name, "info")) { - readline_set_completion_index(cur_mon->rs, strlen(str)); - for(cmd = info_cmds; cmd->name != NULL; cmd++) { - cmd_completion(str, cmd->name); - } - } else if (!strcmp(cmd->name, "sendkey")) { + if (!strcmp(cmd->name, "sendkey")) { char *sep = strrchr(str, '-'); if (sep) str = sep + 1; @@ -4163,6 +4188,14 @@ static void monitor_find_completion(const char *cmdline) cmd_completion(str, cmd->name); } } + case 'S': + /* generic string packaged */ + if (!strcmp(cmd->name, "info")) { + readline_set_completion_index(cur_mon->rs, strlen(str)); + for (cmd = info_cmds; cmd->name != NULL; cmd++) { + cmd_completion(str, cmd->name); + } + } break; default: break; @@ -4483,7 +4516,7 @@ static void handle_qmp_command(JSONMessageParser *parser, QList *tokens) goto err_out; } - cmd = qmp_find_cmd(cmd_name); + cmd = monitor_find_command(cmd_name, qmp_cmds); if (!cmd) { qerror_report(QERR_COMMAND_NOT_FOUND, cmd_name); goto err_out;
-- Best Regards Wenchao Xia
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