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git01.mediatek.com / haproxy / 327ea5aec83092404bca09df2fb9aa86118c8a73 / . / src / cli.c
blob: 32f30f865de924219dc0e42b7eb19fd3f996f5b0 [file] [log] [blame]
/*
* Functions dedicated to statistics output and the stats socket
*
* Copyright 2000-2012 Willy Tarreau <w@1wt.eu>
* Copyright 2007-2009 Krzysztof Piotr Oledzki <ole@ans.pl>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*
*/
#include <ctype.h>
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <pwd.h>
#include <grp.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <net/if.h>
#include <common/cfgparse.h>
#include <common/compat.h>
#include <common/config.h>
#include <common/debug.h>
#include <common/initcall.h>
#include <common/memory.h>
#include <common/mini-clist.h>
#include <common/standard.h>
#include <common/ticks.h>
#include <common/time.h>
#include <common/uri_auth.h>
#include <common/version.h>
#include <common/base64.h>
#include <types/applet.h>
#include <types/global.h>
#include <types/dns.h>
#include <types/stats.h>
#include <proto/activity.h>
#include <proto/backend.h>
#include <proto/channel.h>
#include <proto/checks.h>
#include <proto/cli.h>
#include <proto/compression.h>
#include <proto/stats.h>
#include <proto/fd.h>
#include <proto/freq_ctr.h>
#include <proto/frontend.h>
#include <proto/log.h>
#include <proto/pattern.h>
#include <proto/pipe.h>
#include <proto/protocol.h>
#include <proto/listener.h>
#include <proto/map.h>
#include <proto/proxy.h>
#include <proto/sample.h>
#include <proto/session.h>
#include <proto/stream.h>
#include <proto/server.h>
#include <proto/ssl_sock.h>
#include <proto/stream_interface.h>
#include <proto/task.h>
#include <proto/proto_udp.h>
#define PAYLOAD_PATTERN "<<"
static struct applet cli_applet;
static const char stats_sock_usage_msg[] =
"Unknown command. Please enter one of the following commands only :\n"
" help : this message\n"
" prompt : toggle interactive mode with prompt\n"
" quit : disconnect\n"
"";
static const char stats_permission_denied_msg[] =
"Permission denied\n"
"";
static THREAD_LOCAL char *dynamic_usage_msg = NULL;
/* List head of cli keywords */
static struct cli_kw_list cli_keywords = {
.list = LIST_HEAD_INIT(cli_keywords.list)
};
extern const char *stat_status_codes[];
static struct proxy *mworker_proxy; /* CLI proxy of the master */
static char *cli_gen_usage_msg(struct appctx *appctx)
{
struct cli_kw_list *kw_list;
struct cli_kw *kw;
struct buffer *tmp = get_trash_chunk();
struct buffer out;
free(dynamic_usage_msg);
dynamic_usage_msg = NULL;
if (LIST_ISEMPTY(&cli_keywords.list))
goto end;
chunk_reset(tmp);
chunk_strcat(tmp, stats_sock_usage_msg);
list_for_each_entry(kw_list, &cli_keywords.list, list) {
kw = &kw_list->kw[0];
while (kw->str_kw[0]) {
/* in a worker or normal process, don't display master only commands */
if (master == 0 && (kw->level & ACCESS_MASTER_ONLY))
goto next_kw;
/* in master don't displays if we don't have the master bits */
if (master == 1 && !(kw->level & (ACCESS_MASTER_ONLY|ACCESS_MASTER)))
goto next_kw;
/* only show expert commands in expert mode */
if ((kw->level & ~appctx->cli_level) & ACCESS_EXPERT)
goto next_kw;
if (kw->usage)
chunk_appendf(tmp, " %s\n", kw->usage);
next_kw:
kw++;
}
}
chunk_init(&out, NULL, 0);
chunk_dup(&out, tmp);
dynamic_usage_msg = out.area;
end:
if (dynamic_usage_msg) {
appctx->ctx.cli.severity = LOG_INFO;
appctx->ctx.cli.msg = dynamic_usage_msg;
}
else {
appctx->ctx.cli.severity = LOG_INFO;
appctx->ctx.cli.msg = stats_sock_usage_msg;
}
appctx->st0 = CLI_ST_PRINT;
return dynamic_usage_msg;
}
struct cli_kw* cli_find_kw(char **args)
{
struct cli_kw_list *kw_list;
struct cli_kw *kw;/* current cli_kw */
char **tmp_args;
const char **tmp_str_kw;
int found = 0;
if (LIST_ISEMPTY(&cli_keywords.list))
return NULL;
list_for_each_entry(kw_list, &cli_keywords.list, list) {
kw = &kw_list->kw[0];
while (*kw->str_kw) {
tmp_args = args;
tmp_str_kw = kw->str_kw;
while (*tmp_str_kw) {
if (strcmp(*tmp_str_kw, *tmp_args) == 0) {
found = 1;
} else {
found = 0;
break;
}
tmp_args++;
tmp_str_kw++;
}
if (found)
return (kw);
kw++;
}
}
return NULL;
}
void cli_register_kw(struct cli_kw_list *kw_list)
{
LIST_ADDQ(&cli_keywords.list, &kw_list->list);
}
/* allocate a new stats frontend named <name>, and return it
* (or NULL in case of lack of memory).
*/
static struct proxy *alloc_stats_fe(const char *name, const char *file, int line)
{
struct proxy *fe;
fe = calloc(1, sizeof(*fe));
if (!fe)
return NULL;
init_new_proxy(fe);
fe->next = proxies_list;
proxies_list = fe;
fe->last_change = now.tv_sec;
fe->id = strdup("GLOBAL");
fe->cap = PR_CAP_FE;
fe->maxconn = 10; /* default to 10 concurrent connections */
fe->timeout.client = MS_TO_TICKS(10000); /* default timeout of 10 seconds */
fe->conf.file = strdup(file);
fe->conf.line = line;
fe->accept = frontend_accept;
fe->default_target = &cli_applet.obj_type;
/* the stats frontend is the only one able to assign ID #0 */
fe->conf.id.key = fe->uuid = 0;
eb32_insert(&used_proxy_id, &fe->conf.id);
return fe;
}
/* This function parses a "stats" statement in the "global" section. It returns
* -1 if there is any error, otherwise zero. If it returns -1, it will write an
* error message into the <err> buffer which will be preallocated. The trailing
* '\n' must not be written. The function must be called with <args> pointing to
* the first word after "stats".
*/
static int stats_parse_global(char **args, int section_type, struct proxy *curpx,
struct proxy *defpx, const char *file, int line,
char **err)
{
struct bind_conf *bind_conf;
struct listener *l;
if (!strcmp(args[1], "socket")) {
int cur_arg;
if (*args[2] == 0) {
memprintf(err, "'%s %s' in global section expects an address or a path to a UNIX socket", args[0], args[1]);
return -1;
}
if (!global.stats_fe) {
if ((global.stats_fe = alloc_stats_fe("GLOBAL", file, line)) == NULL) {
memprintf(err, "'%s %s' : out of memory trying to allocate a frontend", args[0], args[1]);
return -1;
}
}
bind_conf = bind_conf_alloc(global.stats_fe, file, line, args[2], xprt_get(XPRT_RAW));
bind_conf->level &= ~ACCESS_LVL_MASK;
bind_conf->level |= ACCESS_LVL_OPER; /* default access level */
if (!str2listener(args[2], global.stats_fe, bind_conf, file, line, err)) {
memprintf(err, "parsing [%s:%d] : '%s %s' : %s\n",
file, line, args[0], args[1], err && *err ? *err : "error");
return -1;
}
cur_arg = 3;
while (*args[cur_arg]) {
static int bind_dumped;
struct bind_kw *kw;
kw = bind_find_kw(args[cur_arg]);
if (kw) {
if (!kw->parse) {
memprintf(err, "'%s %s' : '%s' option is not implemented in this version (check build options).",
args[0], args[1], args[cur_arg]);
return -1;
}
if (kw->parse(args, cur_arg, global.stats_fe, bind_conf, err) != 0) {
if (err && *err)
memprintf(err, "'%s %s' : '%s'", args[0], args[1], *err);
else
memprintf(err, "'%s %s' : error encountered while processing '%s'",
args[0], args[1], args[cur_arg]);
return -1;
}
cur_arg += 1 + kw->skip;
continue;
}
if (!bind_dumped) {
bind_dump_kws(err);
indent_msg(err, 4);
bind_dumped = 1;
}
memprintf(err, "'%s %s' : unknown keyword '%s'.%s%s",
args[0], args[1], args[cur_arg],
err && *err ? " Registered keywords :" : "", err && *err ? *err : "");
return -1;
}
list_for_each_entry(l, &bind_conf->listeners, by_bind) {
l->accept = session_accept_fd;
l->default_target = global.stats_fe->default_target;
l->options |= LI_O_UNLIMITED; /* don't make the peers subject to global limits */
l->nice = -64; /* we want to boost priority for local stats */
global.maxsock++; /* for the listening socket */
}
}
else if (!strcmp(args[1], "timeout")) {
unsigned timeout;
const char *res = parse_time_err(args[2], &timeout, TIME_UNIT_MS);
if (res == PARSE_TIME_OVER) {
memprintf(err, "timer overflow in argument '%s' to '%s %s' (maximum value is 2147483647 ms or ~24.8 days)",
args[2], args[0], args[1]);
return -1;
}
else if (res == PARSE_TIME_UNDER) {
memprintf(err, "timer underflow in argument '%s' to '%s %s' (minimum non-null value is 1 ms)",
args[2], args[0], args[1]);
return -1;
}
else if (res) {
memprintf(err, "'%s %s' : unexpected character '%c'", args[0], args[1], *res);
return -1;
}
if (!timeout) {
memprintf(err, "'%s %s' expects a positive value", args[0], args[1]);
return -1;
}
if (!global.stats_fe) {
if ((global.stats_fe = alloc_stats_fe("GLOBAL", file, line)) == NULL) {
memprintf(err, "'%s %s' : out of memory trying to allocate a frontend", args[0], args[1]);
return -1;
}
}
global.stats_fe->timeout.client = MS_TO_TICKS(timeout);
}
else if (!strcmp(args[1], "maxconn")) {
int maxconn = atol(args[2]);
if (maxconn <= 0) {
memprintf(err, "'%s %s' expects a positive value", args[0], args[1]);
return -1;
}
if (!global.stats_fe) {
if ((global.stats_fe = alloc_stats_fe("GLOBAL", file, line)) == NULL) {
memprintf(err, "'%s %s' : out of memory trying to allocate a frontend", args[0], args[1]);
return -1;
}
}
global.stats_fe->maxconn = maxconn;
}
else if (!strcmp(args[1], "bind-process")) { /* enable the socket only on some processes */
int cur_arg = 2;
unsigned long set = 0;
if (!global.stats_fe) {
if ((global.stats_fe = alloc_stats_fe("GLOBAL", file, line)) == NULL) {
memprintf(err, "'%s %s' : out of memory trying to allocate a frontend", args[0], args[1]);
return -1;
}
}
while (*args[cur_arg]) {
if (strcmp(args[cur_arg], "all") == 0) {
set = 0;
break;
}
if (parse_process_number(args[cur_arg], &set, MAX_PROCS, NULL, err)) {
memprintf(err, "'%s %s' : %s", args[0], args[1], *err);
return -1;
}
cur_arg++;
}
global.stats_fe->bind_proc = set;
}
else {
memprintf(err, "'%s' only supports 'socket', 'maxconn', 'bind-process' and 'timeout' (got '%s')", args[0], args[1]);
return -1;
}
return 0;
}
/*
* This function exports the bound addresses of a <frontend> in the environment
* variable <varname>. Those addresses are separated by semicolons and prefixed
* with their type (abns@, unix@, sockpair@ etc)
* Return -1 upon error, 0 otherwise
*/
int listeners_setenv(struct proxy *frontend, const char *varname)
{
struct buffer *trash = get_trash_chunk();
struct bind_conf *bind_conf;
if (frontend) {
list_for_each_entry(bind_conf, &frontend->conf.bind, by_fe) {
struct listener *l;
list_for_each_entry(l, &bind_conf->listeners, by_bind) {
char addr[46];
char port[6];
/* separate listener by semicolons */
if (trash->data)
chunk_appendf(trash, ";");
if (l->addr.ss_family == AF_UNIX) {
const struct sockaddr_un *un;
un = (struct sockaddr_un *)&l->addr;
if (un->sun_path[0] == '\0') {
chunk_appendf(trash, "abns@%s", un->sun_path+1);
} else {
chunk_appendf(trash, "unix@%s", un->sun_path);
}
} else if (l->addr.ss_family == AF_INET) {
addr_to_str(&l->addr, addr, sizeof(addr));
port_to_str(&l->addr, port, sizeof(port));
chunk_appendf(trash, "ipv4@%s:%s", addr, port);
} else if (l->addr.ss_family == AF_INET6) {
addr_to_str(&l->addr, addr, sizeof(addr));
port_to_str(&l->addr, port, sizeof(port));
chunk_appendf(trash, "ipv6@[%s]:%s", addr, port);
} else if (l->addr.ss_family == AF_CUST_SOCKPAIR) {
chunk_appendf(trash, "sockpair@%d", ((struct sockaddr_in *)&l->addr)->sin_addr.s_addr);
}
}
}
trash->area[trash->data++] = '\0';
if (setenv(varname, trash->area, 1) < 0)
return -1;
}
return 0;
}
int cli_socket_setenv()
{
if (listeners_setenv(global.stats_fe, "HAPROXY_CLI") < 0)
return -1;
if (listeners_setenv(mworker_proxy, "HAPROXY_MASTER_CLI") < 0)
return -1;
return 0;
}
REGISTER_CONFIG_POSTPARSER("cli", cli_socket_setenv);
/* Verifies that the CLI at least has a level at least as high as <level>
* (typically ACCESS_LVL_ADMIN). Returns 1 if OK, otherwise 0. In case of
* failure, an error message is prepared and the appctx's state is adjusted
* to print it so that a return 1 is enough to abort any processing.
*/
int cli_has_level(struct appctx *appctx, int level)
{
if ((appctx->cli_level & ACCESS_LVL_MASK) < level) {
cli_err(appctx, stats_permission_denied_msg);
return 0;
}
return 1;
}
/* same as cli_has_level but for the CLI proxy and without error message */
int pcli_has_level(struct stream *s, int level)
{
if ((s->pcli_flags & ACCESS_LVL_MASK) < level) {
return 0;
}
return 1;
}
/* Returns severity_output for the current session if set, or default for the socket */
static int cli_get_severity_output(struct appctx *appctx)
{
if (appctx->cli_severity_output)
return appctx->cli_severity_output;
return strm_li(si_strm(appctx->owner))->bind_conf->severity_output;
}
/* Processes the CLI interpreter on the stats socket. This function is called
* from the CLI's IO handler running in an appctx context. The function returns 1
* if the request was understood, otherwise zero. It is called with appctx->st0
* set to CLI_ST_GETREQ and presets ->st2 to 0 so that parsers don't have to do
* it. It will possilbly leave st0 to CLI_ST_CALLBACK if the keyword needs to
* have its own I/O handler called again. Most of the time, parsers will only
* set st0 to CLI_ST_PRINT and put their message to be displayed into cli.msg.
* If a keyword parser is NULL and an I/O handler is declared, the I/O handler
* will automatically be used.
*/
static int cli_parse_request(struct appctx *appctx)
{
char *args[MAX_STATS_ARGS + 1], *p, *end, *payload = NULL;
int i = 0;
struct cli_kw *kw;
appctx->st2 = 0;
memset(&appctx->ctx.cli, 0, sizeof(appctx->ctx.cli));
LIST_INIT(&appctx->ctx.cli.l0);
p = appctx->chunk->area;
end = p + appctx->chunk->data;
/*
* Get the payload start if there is one.
* For the sake of simplicity, the payload pattern is looked up
* everywhere from the start of the input but it can only be found
* at the end of the first line if APPCTX_CLI_ST1_PAYLOAD is set.
*
* The input string was zero terminated so it is safe to use
* the str*() functions throughout the parsing
*/
if (appctx->st1 & APPCTX_CLI_ST1_PAYLOAD) {
payload = strstr(p, PAYLOAD_PATTERN);
end = payload;
/* skip the pattern */
payload += strlen(PAYLOAD_PATTERN);
}
/*
* Get pointers on words.
* One extra slot is reserved to store a pointer on a null byte.
*/
while (i < MAX_STATS_ARGS && p < end) {
int j, k;
/* skip leading spaces/tabs */
p += strspn(p, " \t");
if (!*p)
break;
args[i] = p;
p += strcspn(p, " \t");
*p++ = 0;
/* unescape backslashes (\) */
for (j = 0, k = 0; args[i][k]; k++) {
if (args[i][k] == '\\') {
if (args[i][k + 1] == '\\')
k++;
else
continue;
}
args[i][j] = args[i][k];
j++;
}
args[i][j] = 0;
i++;
}
/* fill unused slots */
p = appctx->chunk->area + appctx->chunk->data;
for (; i < MAX_STATS_ARGS + 1; i++)
args[i] = p;
kw = cli_find_kw(args);
if (!kw)
return 0;
/* in a worker or normal process, don't display master only commands */
if (master == 0 && (kw->level & ACCESS_MASTER_ONLY))
return 0;
/* in master don't displays if we don't have the master bits */
if (master == 1 && !(kw->level & (ACCESS_MASTER_ONLY|ACCESS_MASTER)))
return 0;
/* only accept expert commands in expert mode */
if ((kw->level & ~appctx->cli_level) & ACCESS_EXPERT)
return 0;
appctx->io_handler = kw->io_handler;
appctx->io_release = kw->io_release;
if (kw->parse && kw->parse(args, payload, appctx, kw->private) != 0)
goto fail;
/* kw->parse could set its own io_handler or io_release handler */
if (!appctx->io_handler)
goto fail;
appctx->st0 = CLI_ST_CALLBACK;
return 1;
fail:
appctx->io_handler = NULL;
appctx->io_release = NULL;
return 1;
}
/* prepends then outputs the argument msg with a syslog-type severity depending on severity_output value */
static int cli_output_msg(struct channel *chn, const char *msg, int severity, int severity_output)
{
struct buffer *tmp;
if (likely(severity_output == CLI_SEVERITY_NONE))
return ci_putblk(chn, msg, strlen(msg));
tmp = get_trash_chunk();
chunk_reset(tmp);
if (severity < 0 || severity > 7) {
ha_warning("socket command feedback with invalid severity %d", severity);
chunk_printf(tmp, "[%d]: ", severity);
}
else {
switch (severity_output) {
case CLI_SEVERITY_NUMBER:
chunk_printf(tmp, "[%d]: ", severity);
break;
case CLI_SEVERITY_STRING:
chunk_printf(tmp, "[%s]: ", log_levels[severity]);
break;
default:
ha_warning("Unrecognized severity output %d", severity_output);
}
}
chunk_appendf(tmp, "%s", msg);
return ci_putblk(chn, tmp->area, strlen(tmp->area));
}
/* This I/O handler runs as an applet embedded in a stream interface. It is
* used to processes I/O from/to the stats unix socket. The system relies on a
* state machine handling requests and various responses. We read a request,
* then we process it and send the response, and we possibly display a prompt.
* Then we can read again. The state is stored in appctx->st0 and is one of the
* CLI_ST_* constants. appctx->st1 is used to indicate whether prompt is enabled
* or not.
*/
static void cli_io_handler(struct appctx *appctx)
{
struct stream_interface *si = appctx->owner;
struct channel *req = si_oc(si);
struct channel *res = si_ic(si);
struct bind_conf *bind_conf = strm_li(si_strm(si))->bind_conf;
int reql;
int len;
if (unlikely(si->state == SI_ST_DIS || si->state == SI_ST_CLO))
goto out;
/* Check if the input buffer is available. */
if (res->buf.size == 0) {
/* buf.size==0 means we failed to get a buffer and were
* already subscribed to a wait list to get a buffer.
*/
goto out;
}
while (1) {
if (appctx->st0 == CLI_ST_INIT) {
/* Stats output not initialized yet */
memset(&appctx->ctx.stats, 0, sizeof(appctx->ctx.stats));
/* reset severity to default at init */
appctx->cli_severity_output = bind_conf->severity_output;
appctx->st0 = CLI_ST_GETREQ;
appctx->cli_level = bind_conf->level;
}
else if (appctx->st0 == CLI_ST_END) {
/* Let's close for real now. We just close the request
* side, the conditions below will complete if needed.
*/
si_shutw(si);
free_trash_chunk(appctx->chunk);
break;
}
else if (appctx->st0 == CLI_ST_GETREQ) {
char *str;
/* use a trash chunk to store received data */
if (!appctx->chunk) {
appctx->chunk = alloc_trash_chunk();
if (!appctx->chunk) {
appctx->st0 = CLI_ST_END;
continue;
}
}
str = appctx->chunk->area + appctx->chunk->data;
/* ensure we have some output room left in the event we
* would want to return some info right after parsing.
*/
if (buffer_almost_full(si_ib(si))) {
si_rx_room_blk(si);
break;
}
/* '- 1' is to ensure a null byte can always be inserted at the end */
reql = co_getline(si_oc(si), str,
appctx->chunk->size - appctx->chunk->data - 1);
if (reql <= 0) { /* closed or EOL not found */
if (reql == 0)
break;
appctx->st0 = CLI_ST_END;
continue;
}
if (!(appctx->st1 & APPCTX_CLI_ST1_PAYLOAD)) {
/* seek for a possible unescaped semi-colon. If we find
* one, we replace it with an LF and skip only this part.
*/
for (len = 0; len < reql; len++) {
if (str[len] == '\\') {
len++;
continue;
}
if (str[len] == ';') {
str[len] = '\n';
reql = len + 1;
break;
}
}
}
/* now it is time to check that we have a full line,
* remove the trailing \n and possibly \r, then cut the
* line.
*/
len = reql - 1;
if (str[len] != '\n') {
appctx->st0 = CLI_ST_END;
continue;
}
if (len && str[len-1] == '\r')
len--;
str[len] = '\0';
appctx->chunk->data += len;
if (appctx->st1 & APPCTX_CLI_ST1_PAYLOAD) {
appctx->chunk->area[appctx->chunk->data] = '\n';
appctx->chunk->area[appctx->chunk->data + 1] = 0;
appctx->chunk->data++;
}
appctx->st0 = CLI_ST_PROMPT;
if (appctx->st1 & APPCTX_CLI_ST1_PAYLOAD) {
/* empty line */
if (!len) {
/* remove the last two \n */
appctx->chunk->data -= 2;
appctx->chunk->area[appctx->chunk->data] = 0;
if (!cli_parse_request(appctx))
cli_gen_usage_msg(appctx);
chunk_reset(appctx->chunk);
/* NB: cli_sock_parse_request() may have put
* another CLI_ST_O_* into appctx->st0.
*/
appctx->st1 &= ~APPCTX_CLI_ST1_PAYLOAD;
}
}
else {
/*
* Look for the "payload start" pattern at the end of a line
* Its location is not remembered here, this is just to switch
* to a gathering mode.
*/
if (!strcmp(appctx->chunk->area + appctx->chunk->data - strlen(PAYLOAD_PATTERN), PAYLOAD_PATTERN))
appctx->st1 |= APPCTX_CLI_ST1_PAYLOAD;
else {
/* no payload, the command is complete: parse the request */
if (!cli_parse_request(appctx))
cli_gen_usage_msg(appctx);
chunk_reset(appctx->chunk);
}
}
/* re-adjust req buffer */
co_skip(si_oc(si), reql);
req->flags |= CF_READ_DONTWAIT; /* we plan to read small requests */
}
else { /* output functions */
const char *msg;
int sev;
switch (appctx->st0) {
case CLI_ST_PROMPT:
break;
case CLI_ST_PRINT: /* print const message in msg */
case CLI_ST_PRINT_ERR: /* print const error in msg */
case CLI_ST_PRINT_DYN: /* print dyn message in msg, free */
case CLI_ST_PRINT_FREE: /* print dyn error in err, free */
if (appctx->st0 == CLI_ST_PRINT || appctx->st0 == CLI_ST_PRINT_ERR) {
sev = appctx->st0 == CLI_ST_PRINT_ERR ?
LOG_ERR : appctx->ctx.cli.severity;
msg = appctx->ctx.cli.msg;
}
else if (appctx->st0 == CLI_ST_PRINT_DYN || appctx->st0 == CLI_ST_PRINT_FREE) {
sev = appctx->st0 == CLI_ST_PRINT_FREE ?
LOG_ERR : appctx->ctx.cli.severity;
msg = appctx->ctx.cli.err;
if (!msg) {
sev = LOG_ERR;
msg = "Out of memory.\n";
}
}
else {
sev = LOG_ERR;
msg = "Internal error.\n";
}
if (cli_output_msg(res, msg, sev, cli_get_severity_output(appctx)) != -1) {
if (appctx->st0 == CLI_ST_PRINT_FREE ||
appctx->st0 == CLI_ST_PRINT_DYN) {
free(appctx->ctx.cli.err);
appctx->ctx.cli.err = NULL;
}
appctx->st0 = CLI_ST_PROMPT;
}
else
si_rx_room_blk(si);
break;
case CLI_ST_CALLBACK: /* use custom pointer */
if (appctx->io_handler)
if (appctx->io_handler(appctx)) {
appctx->st0 = CLI_ST_PROMPT;
if (appctx->io_release) {
appctx->io_release(appctx);
appctx->io_release = NULL;
}
}
break;
default: /* abnormal state */
si->flags |= SI_FL_ERR;
break;
}
/* The post-command prompt is either LF alone or LF + '> ' in interactive mode */
if (appctx->st0 == CLI_ST_PROMPT) {
const char *prompt = "";
if (appctx->st1 & APPCTX_CLI_ST1_PROMPT) {
/*
* when entering a payload with interactive mode, change the prompt
* to emphasize that more data can still be sent
*/
if (appctx->chunk->data && appctx->st1 & APPCTX_CLI_ST1_PAYLOAD)
prompt = "+ ";
else
prompt = "\n> ";
}
else {
if (!(appctx->st1 & (APPCTX_CLI_ST1_PAYLOAD|APPCTX_CLI_ST1_NOLF)))
prompt = "\n";
}
if (ci_putstr(si_ic(si), prompt) != -1)
appctx->st0 = CLI_ST_GETREQ;
else
si_rx_room_blk(si);
}
/* If the output functions are still there, it means they require more room. */
if (appctx->st0 >= CLI_ST_OUTPUT)
break;
/* Now we close the output if one of the writers did so,
* or if we're not in interactive mode and the request
* buffer is empty. This still allows pipelined requests
* to be sent in non-interactive mode.
*/
if (((res->flags & (CF_SHUTW|CF_SHUTW_NOW))) ||
(!(appctx->st1 & APPCTX_CLI_ST1_PROMPT) && !co_data(req) && (!(appctx->st1 & APPCTX_CLI_ST1_PAYLOAD)))) {
appctx->st0 = CLI_ST_END;
continue;
}
/* switch state back to GETREQ to read next requests */
appctx->st0 = CLI_ST_GETREQ;
/* reactivate the \n at the end of the response for the next command */
appctx->st1 &= ~APPCTX_CLI_ST1_NOLF;
}
}
if ((res->flags & CF_SHUTR) && (si->state == SI_ST_EST)) {
DPRINTF(stderr, "%s@%d: si to buf closed. req=%08x, res=%08x, st=%d\n",
__FUNCTION__, __LINE__, req->flags, res->flags, si->state);
/* Other side has closed, let's abort if we have no more processing to do
* and nothing more to consume. This is comparable to a broken pipe, so
* we forward the close to the request side so that it flows upstream to
* the client.
*/
si_shutw(si);
}
if ((req->flags & CF_SHUTW) && (si->state == SI_ST_EST) && (appctx->st0 < CLI_ST_OUTPUT)) {
DPRINTF(stderr, "%s@%d: buf to si closed. req=%08x, res=%08x, st=%d\n",
__FUNCTION__, __LINE__, req->flags, res->flags, si->state);
/* We have no more processing to do, and nothing more to send, and
* the client side has closed. So we'll forward this state downstream
* on the response buffer.
*/
si_shutr(si);
res->flags |= CF_READ_NULL;
}
out:
DPRINTF(stderr, "%s@%d: st=%d, rqf=%x, rpf=%x, rqh=%lu, rqs=%lu, rh=%lu, rs=%lu\n",
__FUNCTION__, __LINE__,
si->state, req->flags, res->flags, ci_data(req), co_data(req), ci_data(res), co_data(res));
}
/* This is called when the stream interface is closed. For instance, upon an
* external abort, we won't call the i/o handler anymore so we may need to
* remove back references to the stream currently being dumped.
*/
static void cli_release_handler(struct appctx *appctx)
{
if (appctx->io_release) {
appctx->io_release(appctx);
appctx->io_release = NULL;
}
else if (appctx->st0 == CLI_ST_PRINT_FREE || appctx->st0 == CLI_ST_PRINT_DYN) {
free(appctx->ctx.cli.err);
appctx->ctx.cli.err = NULL;
}
}
/* This function dumps all environmnent variables to the buffer. It returns 0
* if the output buffer is full and it needs to be called again, otherwise
* non-zero. Dumps only one entry if st2 == STAT_ST_END. It uses cli.p0 as the
* pointer to the current variable.
*/
static int cli_io_handler_show_env(struct appctx *appctx)
{
struct stream_interface *si = appctx->owner;
char **var = appctx->ctx.cli.p0;
if (unlikely(si_ic(si)->flags & (CF_WRITE_ERROR|CF_SHUTW)))
return 1;
chunk_reset(&trash);
/* we have two inner loops here, one for the proxy, the other one for
* the buffer.
*/
while (*var) {
chunk_printf(&trash, "%s\n", *var);
if (ci_putchk(si_ic(si), &trash) == -1) {
si_rx_room_blk(si);
return 0;
}
if (appctx->st2 == STAT_ST_END)
break;
var++;
appctx->ctx.cli.p0 = var;
}
/* dump complete */
return 1;
}
/* This function dumps all file descriptors states (or the requested one) to
* the buffer. It returns 0 if the output buffer is full and it needs to be
* called again, otherwise non-zero. Dumps only one entry if st2 == STAT_ST_END.
* It uses cli.i0 as the fd number to restart from.
*/
static int cli_io_handler_show_fd(struct appctx *appctx)
{
struct stream_interface *si = appctx->owner;
int fd = appctx->ctx.cli.i0;
int ret = 1;
if (unlikely(si_ic(si)->flags & (CF_WRITE_ERROR|CF_SHUTW)))
goto end;
chunk_reset(&trash);
/* isolate the threads once per round. We're limited to a buffer worth
* of output anyway, it cannot last very long.
*/
thread_isolate();
/* we have two inner loops here, one for the proxy, the other one for
* the buffer.
*/
while (fd >= 0 && fd < global.maxsock) {
struct fdtab fdt;
struct listener *li = NULL;
struct server *sv = NULL;
struct proxy *px = NULL;
const struct mux_ops *mux = NULL;
void *ctx = NULL;
uint32_t conn_flags = 0;
int is_back = 0;
fdt = fdtab[fd];
if (!fdt.owner)
goto skip; // closed
if (fdt.iocb == conn_fd_handler) {
conn_flags = ((struct connection *)fdt.owner)->flags;
mux = ((struct connection *)fdt.owner)->mux;
ctx = ((struct connection *)fdt.owner)->ctx;
li = objt_listener(((struct connection *)fdt.owner)->target);
sv = objt_server(((struct connection *)fdt.owner)->target);
px = objt_proxy(((struct connection *)fdt.owner)->target);
is_back = conn_is_back((struct connection *)fdt.owner);
}
else if (fdt.iocb == listener_accept)
li = fdt.owner;
chunk_printf(&trash,
" %5d : st=0x%02x(R:%c%c W:%c%c) ev=0x%02x(%c%c%c%c%c) [%c%c] tmask=0x%lx umask=0x%lx owner=%p iocb=%p(%s)",
fd,
fdt.state,
(fdt.state & FD_EV_READY_R) ? 'R' : 'r',
(fdt.state & FD_EV_ACTIVE_R) ? 'A' : 'a',
(fdt.state & FD_EV_READY_W) ? 'R' : 'r',
(fdt.state & FD_EV_ACTIVE_W) ? 'A' : 'a',
fdt.ev,
(fdt.ev & FD_POLL_HUP) ? 'H' : 'h',
(fdt.ev & FD_POLL_ERR) ? 'E' : 'e',
(fdt.ev & FD_POLL_OUT) ? 'O' : 'o',
(fdt.ev & FD_POLL_PRI) ? 'P' : 'p',
(fdt.ev & FD_POLL_IN) ? 'I' : 'i',
fdt.linger_risk ? 'L' : 'l',
fdt.cloned ? 'C' : 'c',
fdt.thread_mask, fdt.update_mask,
fdt.owner,
fdt.iocb,
(fdt.iocb == conn_fd_handler) ? "conn_fd_handler" :
(fdt.iocb == dgram_fd_handler) ? "dgram_fd_handler" :
(fdt.iocb == listener_accept) ? "listener_accept" :
(fdt.iocb == poller_pipe_io_handler) ? "poller_pipe_io_handler" :
(fdt.iocb == mworker_accept_wrapper) ? "mworker_accept_wrapper" :
#ifdef USE_OPENSSL
#if (HA_OPENSSL_VERSION_NUMBER >= 0x1010000fL) && !defined(OPENSSL_NO_ASYNC)
(fdt.iocb == ssl_async_fd_free) ? "ssl_async_fd_free" :
(fdt.iocb == ssl_async_fd_handler) ? "ssl_async_fd_handler" :
#endif
#endif
"unknown");
if (fdt.iocb == conn_fd_handler) {
chunk_appendf(&trash, " back=%d cflg=0x%08x", is_back, conn_flags);
if (px)
chunk_appendf(&trash, " px=%s", px->id);
else if (sv)
chunk_appendf(&trash, " sv=%s/%s", sv->id, sv->proxy->id);
else if (li)
chunk_appendf(&trash, " fe=%s", li->bind_conf->frontend->id);
if (mux) {
chunk_appendf(&trash, " mux=%s ctx=%p", mux->name, ctx);
if (mux->show_fd)
mux->show_fd(&trash, fdt.owner);
}
else
chunk_appendf(&trash, " nomux");
}
else if (fdt.iocb == listener_accept) {
chunk_appendf(&trash, " l.st=%s fe=%s",
listener_state_str(li),
li->bind_conf->frontend->id);
}
chunk_appendf(&trash, "\n");
if (ci_putchk(si_ic(si), &trash) == -1) {
si_rx_room_blk(si);
appctx->ctx.cli.i0 = fd;
ret = 0;
break;
}
skip:
if (appctx->st2 == STAT_ST_END)
break;
fd++;
}
end:
/* dump complete */
thread_release();
return ret;
}
/* This function dumps some activity counters used by developers and support to
* rule out some hypothesis during bug reports. It returns 0 if the output
* buffer is full and it needs to be called again, otherwise non-zero. It dumps
* everything at once in the buffer and is not designed to do it in multiple
* passes.
*/
static int cli_io_handler_show_activity(struct appctx *appctx)
{
struct stream_interface *si = appctx->owner;
int thr;
if (unlikely(si_ic(si)->flags & (CF_WRITE_ERROR|CF_SHUTW)))
return 1;
chunk_reset(&trash);
#undef SHOW_TOT
#define SHOW_TOT(t, x) \
do { \
unsigned int _v[MAX_THREADS]; \
unsigned int _tot; \
const unsigned int _nbt = global.nbthread; \
for (_tot = t = 0; t < _nbt; t++) \
_tot += _v[t] = (x); \
if (_nbt == 1) { \
chunk_appendf(&trash, " %u\n", _tot); \
break; \
} \
chunk_appendf(&trash, " %u [", _tot); \
for (t = 0; t < _nbt; t++) \
chunk_appendf(&trash, " %u", _v[t]); \
chunk_appendf(&trash, " ]\n"); \
} while (0)
#undef SHOW_AVG
#define SHOW_AVG(t, x) \
do { \
unsigned int _v[MAX_THREADS]; \
unsigned int _tot; \
const unsigned int _nbt = global.nbthread; \
for (_tot = t = 0; t < _nbt; t++) \
_tot += _v[t] = (x); \
if (_nbt == 1) { \
chunk_appendf(&trash, " %u\n", _tot); \
break; \
} \
chunk_appendf(&trash, " %u [", (_tot + _nbt/2) / _nbt); \
for (t = 0; t < _nbt; t++) \
chunk_appendf(&trash, " %u", _v[t]); \
chunk_appendf(&trash, " ]\n"); \
} while (0)
chunk_appendf(&trash, "thread_id: %u (%u..%u)\n", tid + 1, 1, global.nbthread);
chunk_appendf(&trash, "date_now: %lu.%06lu\n", (long)now.tv_sec, (long)now.tv_usec);
chunk_appendf(&trash, "loops:"); SHOW_TOT(thr, activity[thr].loops);
chunk_appendf(&trash, "wake_tasks:"); SHOW_TOT(thr, activity[thr].wake_tasks);
chunk_appendf(&trash, "wake_signal:"); SHOW_TOT(thr, activity[thr].wake_signal);
chunk_appendf(&trash, "poll_exp:"); SHOW_TOT(thr, activity[thr].poll_exp);
chunk_appendf(&trash, "poll_drop:"); SHOW_TOT(thr, activity[thr].poll_drop);
chunk_appendf(&trash, "poll_dead:"); SHOW_TOT(thr, activity[thr].poll_dead);
chunk_appendf(&trash, "poll_skip:"); SHOW_TOT(thr, activity[thr].poll_skip);
chunk_appendf(&trash, "fd_lock:"); SHOW_TOT(thr, activity[thr].fd_lock);
chunk_appendf(&trash, "conn_dead:"); SHOW_TOT(thr, activity[thr].conn_dead);
chunk_appendf(&trash, "stream:"); SHOW_TOT(thr, activity[thr].stream);
chunk_appendf(&trash, "pool_fail:"); SHOW_TOT(thr, activity[thr].pool_fail);
chunk_appendf(&trash, "buf_wait:"); SHOW_TOT(thr, activity[thr].buf_wait);
chunk_appendf(&trash, "empty_rq:"); SHOW_TOT(thr, activity[thr].empty_rq);
chunk_appendf(&trash, "long_rq:"); SHOW_TOT(thr, activity[thr].long_rq);
chunk_appendf(&trash, "ctxsw:"); SHOW_TOT(thr, activity[thr].ctxsw);
chunk_appendf(&trash, "tasksw:"); SHOW_TOT(thr, activity[thr].tasksw);
chunk_appendf(&trash, "cpust_ms_tot:"); SHOW_TOT(thr, activity[thr].cpust_total / 2);
chunk_appendf(&trash, "cpust_ms_1s:"); SHOW_TOT(thr, read_freq_ctr(&activity[thr].cpust_1s) / 2);
chunk_appendf(&trash, "cpust_ms_15s:"); SHOW_TOT(thr, read_freq_ctr_period(&activity[thr].cpust_15s, 15000) / 2);
chunk_appendf(&trash, "avg_loop_us:"); SHOW_AVG(thr, swrate_avg(activity[thr].avg_loop_us, TIME_STATS_SAMPLES));
chunk_appendf(&trash, "accepted:"); SHOW_TOT(thr, activity[thr].accepted);
chunk_appendf(&trash, "accq_pushed:"); SHOW_TOT(thr, activity[thr].accq_pushed);
chunk_appendf(&trash, "accq_full:"); SHOW_TOT(thr, activity[thr].accq_full);
#ifdef USE_THREAD
chunk_appendf(&trash, "accq_ring:"); SHOW_TOT(thr, (accept_queue_rings[thr].tail - accept_queue_rings[thr].head + ACCEPT_QUEUE_SIZE) % ACCEPT_QUEUE_SIZE);
#endif
#if defined(DEBUG_DEV)
/* keep these ones at the end */
chunk_appendf(&trash, "ctr0:"); SHOW_TOT(thr, activity[thr].ctr0);
chunk_appendf(&trash, "ctr1:"); SHOW_TOT(thr, activity[thr].ctr1);
chunk_appendf(&trash, "ctr2:"); SHOW_TOT(thr, activity[thr].ctr2);
#endif
if (ci_putchk(si_ic(si), &trash) == -1) {
chunk_reset(&trash);
chunk_printf(&trash, "[output too large, cannot dump]\n");
si_rx_room_blk(si);
}
#undef SHOW_AVG
#undef SHOW_TOT
/* dump complete */
return 1;
}
/*
* CLI IO handler for `show cli sockets`.
* Uses ctx.cli.p0 to store the restart pointer.
*/
static int cli_io_handler_show_cli_sock(struct appctx *appctx)
{
struct bind_conf *bind_conf;
struct stream_interface *si = appctx->owner;
chunk_reset(&trash);
switch (appctx->st2) {
case STAT_ST_INIT:
chunk_printf(&trash, "# socket lvl processes\n");
if (ci_putchk(si_ic(si), &trash) == -1) {
si_rx_room_blk(si);
return 0;
}
appctx->st2 = STAT_ST_LIST;
case STAT_ST_LIST:
if (global.stats_fe) {
list_for_each_entry(bind_conf, &global.stats_fe->conf.bind, by_fe) {
struct listener *l;
/*
* get the latest dumped node in appctx->ctx.cli.p0
* if the current node is the first of the list
*/
if (appctx->ctx.cli.p0 &&
&bind_conf->by_fe == (&global.stats_fe->conf.bind)->n) {
/* change the current node to the latest dumped and continue the loop */
bind_conf = LIST_ELEM(appctx->ctx.cli.p0, typeof(bind_conf), by_fe);
continue;
}
list_for_each_entry(l, &bind_conf->listeners, by_bind) {
char addr[46];
char port[6];
if (l->addr.ss_family == AF_UNIX) {
const struct sockaddr_un *un;
un = (struct sockaddr_un *)&l->addr;
if (un->sun_path[0] == '\0') {
chunk_appendf(&trash, "abns@%s ", un->sun_path+1);
} else {
chunk_appendf(&trash, "unix@%s ", un->sun_path);
}
} else if (l->addr.ss_family == AF_INET) {
addr_to_str(&l->addr, addr, sizeof(addr));
port_to_str(&l->addr, port, sizeof(port));
chunk_appendf(&trash, "ipv4@%s:%s ", addr, port);
} else if (l->addr.ss_family == AF_INET6) {
addr_to_str(&l->addr, addr, sizeof(addr));
port_to_str(&l->addr, port, sizeof(port));
chunk_appendf(&trash, "ipv6@[%s]:%s ", addr, port);
} else if (l->addr.ss_family == AF_CUST_SOCKPAIR) {
chunk_appendf(&trash, "sockpair@%d ", ((struct sockaddr_in *)&l->addr)->sin_addr.s_addr);
} else
chunk_appendf(&trash, "unknown ");
if ((bind_conf->level & ACCESS_LVL_MASK) == ACCESS_LVL_ADMIN)
chunk_appendf(&trash, "admin ");
else if ((bind_conf->level & ACCESS_LVL_MASK) == ACCESS_LVL_OPER)
chunk_appendf(&trash, "operator ");
else if ((bind_conf->level & ACCESS_LVL_MASK) == ACCESS_LVL_USER)
chunk_appendf(&trash, "user ");
else
chunk_appendf(&trash, " ");
if (bind_conf->bind_proc != 0) {
int pos;
for (pos = 0; pos < 8 * sizeof(bind_conf->bind_proc); pos++) {
if (bind_conf->bind_proc & (1UL << pos)) {
chunk_appendf(&trash, "%d,", pos+1);
}
}
/* replace the latest comma by a newline */
trash.area[trash.data-1] = '\n';
} else {
chunk_appendf(&trash, "all\n");
}
if (ci_putchk(si_ic(si), &trash) == -1) {
si_rx_room_blk(si);
return 0;
}
}
appctx->ctx.cli.p0 = &bind_conf->by_fe; /* store the latest list node dumped */
}
}
default:
appctx->st2 = STAT_ST_FIN;
return 1;
}
}
/* parse a "show env" CLI request. Returns 0 if it needs to continue, 1 if it
* wants to stop here. It puts the variable to be dumped into cli.p0 if a single
* variable is requested otherwise puts environ there.
*/
static int cli_parse_show_env(char **args, char *payload, struct appctx *appctx, void *private)
{
extern char **environ;
char **var;
if (!cli_has_level(appctx, ACCESS_LVL_OPER))
return 1;
var = environ;
if (*args[2]) {
int len = strlen(args[2]);
for (; *var; var++) {
if (strncmp(*var, args[2], len) == 0 &&
(*var)[len] == '=')
break;
}
if (!*var)
return cli_err(appctx, "Variable not found\n");
appctx->st2 = STAT_ST_END;
}
appctx->ctx.cli.p0 = var;
return 0;
}
/* parse a "show fd" CLI request. Returns 0 if it needs to continue, 1 if it
* wants to stop here. It puts the FD number into cli.i0 if a specific FD is
* requested and sets st2 to STAT_ST_END, otherwise leaves 0 in i0.
*/
static int cli_parse_show_fd(char **args, char *payload, struct appctx *appctx, void *private)
{
if (!cli_has_level(appctx, ACCESS_LVL_OPER))
return 1;
appctx->ctx.cli.i0 = 0;
if (*args[2]) {
appctx->ctx.cli.i0 = atoi(args[2]);
appctx->st2 = STAT_ST_END;
}
return 0;
}
/* parse a "set timeout" CLI request. It always returns 1. */
static int cli_parse_set_timeout(char **args, char *payload, struct appctx *appctx, void *private)
{
struct stream_interface *si = appctx->owner;
struct stream *s = si_strm(si);
if (strcmp(args[2], "cli") == 0) {
unsigned timeout;
const char *res;
if (!*args[3])
return cli_err(appctx, "Expects an integer value.\n");
res = parse_time_err(args[3], &timeout, TIME_UNIT_S);
if (res || timeout < 1)
return cli_err(appctx, "Invalid timeout value.\n");
s->req.rto = s->res.wto = 1 + MS_TO_TICKS(timeout*1000);
task_wakeup(s->task, TASK_WOKEN_MSG); // recompute timeouts
return 1;
}
return cli_err(appctx, "'set timeout' only supports 'cli'.\n");
}
/* parse a "set maxconn global" command. It always returns 1. */
static int cli_parse_set_maxconn_global(char **args, char *payload, struct appctx *appctx, void *private)
{
int v;
if (!cli_has_level(appctx, ACCESS_LVL_ADMIN))
return 1;
if (!*args[3])
return cli_err(appctx, "Expects an integer value.\n");
v = atoi(args[3]);
if (v > global.hardmaxconn)
return cli_err(appctx, "Value out of range.\n");
/* check for unlimited values */
if (v <= 0)
v = global.hardmaxconn;
global.maxconn = v;
/* Dequeues all of the listeners waiting for a resource */
dequeue_all_listeners();
return 1;
}
static int set_severity_output(int *target, char *argument)
{
if (!strcmp(argument, "none")) {
*target = CLI_SEVERITY_NONE;
return 1;
}
else if (!strcmp(argument, "number")) {
*target = CLI_SEVERITY_NUMBER;
return 1;
}
else if (!strcmp(argument, "string")) {
*target = CLI_SEVERITY_STRING;
return 1;
}
return 0;
}
/* parse a "set severity-output" command. */
static int cli_parse_set_severity_output(char **args, char *payload, struct appctx *appctx, void *private)
{
if (*args[2] && set_severity_output(&appctx->cli_severity_output, args[2]))
return 0;
return cli_err(appctx, "one of 'none', 'number', 'string' is a required argument\n");
}
/* show the level of the current CLI session */
static int cli_parse_show_lvl(char **args, char *payload, struct appctx *appctx, void *private)
{
if ((appctx->cli_level & ACCESS_LVL_MASK) == ACCESS_LVL_ADMIN)
return cli_msg(appctx, LOG_INFO, "admin\n");
else if ((appctx->cli_level & ACCESS_LVL_MASK) == ACCESS_LVL_OPER)
return cli_msg(appctx, LOG_INFO, "operator\n");
else if ((appctx->cli_level & ACCESS_LVL_MASK) == ACCESS_LVL_USER)
return cli_msg(appctx, LOG_INFO, "user\n");
else
return cli_msg(appctx, LOG_INFO, "unknown\n");
}
/* parse and set the CLI level dynamically */
static int cli_parse_set_lvl(char **args, char *payload, struct appctx *appctx, void *private)
{
/* this will ask the applet to not output a \n after the command */
if (!strcmp(args[1], "-"))
appctx->st1 |= APPCTX_CLI_ST1_NOLF;
if (!strcmp(args[0], "operator")) {
if (!cli_has_level(appctx, ACCESS_LVL_OPER)) {
return 1;
}
appctx->cli_level &= ~ACCESS_LVL_MASK;
appctx->cli_level |= ACCESS_LVL_OPER;
} else if (!strcmp(args[0], "user")) {
if (!cli_has_level(appctx, ACCESS_LVL_USER)) {
return 1;
}
appctx->cli_level &= ~ACCESS_LVL_MASK;
appctx->cli_level |= ACCESS_LVL_USER;
}
appctx->cli_level &= ~ACCESS_EXPERT;
return 1;
}
/* parse and set the CLI expert-mode dynamically */
static int cli_parse_expert_mode(char **args, char *payload, struct appctx *appctx, void *private)
{
if (!cli_has_level(appctx, ACCESS_LVL_ADMIN))
return 1;
if (!*args[1])
return (appctx->cli_level & ACCESS_EXPERT)
? cli_msg(appctx, LOG_INFO, "expert-mode is ON\n")
: cli_msg(appctx, LOG_INFO, "expert-mode is OFF\n");
appctx->cli_level &= ~ACCESS_EXPERT;
if (strcmp(args[1], "on") == 0)
appctx->cli_level |= ACCESS_EXPERT;
return 1;
}
int cli_parse_default(char **args, char *payload, struct appctx *appctx, void *private)
{
return 0;
}
/* parse a "set rate-limit" command. It always returns 1. */
static int cli_parse_set_ratelimit(char **args, char *payload, struct appctx *appctx, void *private)
{
int v;
int *res;
int mul = 1;
if (!cli_has_level(appctx, ACCESS_LVL_ADMIN))
return 1;
if (strcmp(args[2], "connections") == 0 && strcmp(args[3], "global") == 0)
res = &global.cps_lim;
else if (strcmp(args[2], "sessions") == 0 && strcmp(args[3], "global") == 0)
res = &global.sps_lim;
#ifdef USE_OPENSSL
else if (strcmp(args[2], "ssl-sessions") == 0 && strcmp(args[3], "global") == 0)
res = &global.ssl_lim;
#endif
else if (strcmp(args[2], "http-compression") == 0 && strcmp(args[3], "global") == 0) {
res = &global.comp_rate_lim;
mul = 1024;
}
else {
return cli_err(appctx,
"'set rate-limit' only supports :\n"
" - 'connections global' to set the per-process maximum connection rate\n"
" - 'sessions global' to set the per-process maximum session rate\n"
#ifdef USE_OPENSSL
" - 'ssl-sessions global' to set the per-process maximum SSL session rate\n"
#endif
" - 'http-compression global' to set the per-process maximum compression speed in kB/s\n");
}
if (!*args[4])
return cli_err(appctx, "Expects an integer value.\n");
v = atoi(args[4]);
if (v < 0)
return cli_err(appctx, "Value out of range.\n");
*res = v * mul;
/* Dequeues all of the listeners waiting for a resource */
dequeue_all_listeners();
return 1;
}
/* parse the "expose-fd" argument on the bind lines */
static int bind_parse_expose_fd(char **args, int cur_arg, struct proxy *px, struct bind_conf *conf, char **err)
{
if (!*args[cur_arg + 1]) {
memprintf(err, "'%s' : missing fd type", args[cur_arg]);
return ERR_ALERT | ERR_FATAL;
}
if (!strcmp(args[cur_arg+1], "listeners")) {
conf->level |= ACCESS_FD_LISTENERS;
} else {
memprintf(err, "'%s' only supports 'listeners' (got '%s')",
args[cur_arg], args[cur_arg+1]);
return ERR_ALERT | ERR_FATAL;
}
return 0;
}
/* parse the "level" argument on the bind lines */
static int bind_parse_level(char **args, int cur_arg, struct proxy *px, struct bind_conf *conf, char **err)
{
if (!*args[cur_arg + 1]) {
memprintf(err, "'%s' : missing level", args[cur_arg]);
return ERR_ALERT | ERR_FATAL;
}
if (!strcmp(args[cur_arg+1], "user")) {
conf->level &= ~ACCESS_LVL_MASK;
conf->level |= ACCESS_LVL_USER;
} else if (!strcmp(args[cur_arg+1], "operator")) {
conf->level &= ~ACCESS_LVL_MASK;
conf->level |= ACCESS_LVL_OPER;
} else if (!strcmp(args[cur_arg+1], "admin")) {
conf->level &= ~ACCESS_LVL_MASK;
conf->level |= ACCESS_LVL_ADMIN;
} else {
memprintf(err, "'%s' only supports 'user', 'operator', and 'admin' (got '%s')",
args[cur_arg], args[cur_arg+1]);
return ERR_ALERT | ERR_FATAL;
}
return 0;
}
static int bind_parse_severity_output(char **args, int cur_arg, struct proxy *px, struct bind_conf *conf, char **err)
{
if (!*args[cur_arg + 1]) {
memprintf(err, "'%s' : missing severity format", args[cur_arg]);
return ERR_ALERT | ERR_FATAL;
}
if (set_severity_output(&conf->severity_output, args[cur_arg+1]))
return 0;
else {
memprintf(err, "'%s' only supports 'none', 'number', and 'string' (got '%s')",
args[cur_arg], args[cur_arg+1]);
return ERR_ALERT | ERR_FATAL;
}
}
/*
* For one proxy, fill the iov and send the msghdr. Also update fd_it and offset.
* Return -1 upon error, otherwise 0.
*
* This function is only meant to deduplicate the code between the peers and
* the proxy list in _getsocks(), not to be used anywhere else.
*/
inline static int _getsocks_gen_send(struct proxy *px, int sendfd, int *tmpfd, struct iovec *iov,
int tot_fd_nb, int *fd_it, int *offset, struct msghdr *msghdr)
{
int i = *fd_it;
int curoff = *offset;
struct listener *l;
unsigned char *tmpbuf = iov->iov_base;
list_for_each_entry(l, &px->conf.listeners, by_fe) {
int ret;
/* Only transfer IPv4/IPv6 sockets */
if (l->state >= LI_ZOMBIE &&
(l->proto->sock_family == AF_INET ||
l->proto->sock_family == AF_INET6 ||
l->proto->sock_family == AF_UNIX)) {
memcpy(&tmpfd[i % MAX_SEND_FD], &l->fd, sizeof(l->fd));
if (!l->netns)
tmpbuf[curoff++] = 0;
#ifdef USE_NS
else {
char *name = l->netns->node.key;
unsigned char len = l->netns->name_len;
tmpbuf[curoff++] = len;
memcpy(tmpbuf + curoff, name, len);
curoff += len;
}
#endif
if (l->interface) {
unsigned char len = strlen(l->interface);
tmpbuf[curoff++] = len;
memcpy(tmpbuf + curoff, l->interface, len);
curoff += len;
} else
tmpbuf[curoff++] = 0;
memcpy(tmpbuf + curoff, &l->options,
sizeof(l->options));
curoff += sizeof(l->options);
i++;
} else
continue;
/* if it reaches the max number of fd per msghdr */
if ((!(i % MAX_SEND_FD))) {
iov->iov_len = curoff;
if (sendmsg(sendfd, msghdr, 0) != curoff) {
ha_warning("Failed to transfer sockets\n");
return -1;
}
/* Wait for an ack */
do {
ret = recv(sendfd, &tot_fd_nb,
sizeof(tot_fd_nb), 0);
} while (ret == -1 && errno == EINTR);
if (ret <= 0) {
ha_warning("Unexpected error while transferring sockets\n");
return -1;
}
curoff = 0;
}
}
*fd_it = i;
*offset = curoff;
return 0;
}
/* Send all the bound sockets, always returns 1 */
static int _getsocks(char **args, char *payload, struct appctx *appctx, void *private)
{
char *cmsgbuf = NULL;
unsigned char *tmpbuf = NULL;
struct cmsghdr *cmsg;
struct stream_interface *si = appctx->owner;
struct stream *s = si_strm(si);
struct connection *remote = cs_conn(objt_cs(si_opposite(si)->end));
struct msghdr msghdr;
struct iovec iov;
struct timeval tv = { .tv_sec = 1, .tv_usec = 0 };
int *tmpfd;
int tot_fd_nb = 0;
struct proxy *px;
struct peers *prs;
int i = 0;
int fd = -1;
int curoff = 0;
int old_fcntl = -1;
int ret;
if (!remote) {
ha_warning("Only works on real connections\n");
goto out;
}
fd = remote->handle.fd;
/* Temporary set the FD in blocking mode, that will make our life easier */
old_fcntl = fcntl(fd, F_GETFL);
if (old_fcntl < 0) {
ha_warning("Couldn't get the flags for the unix socket\n");
goto out;
}
cmsgbuf = malloc(CMSG_SPACE(sizeof(int) * MAX_SEND_FD));
if (!cmsgbuf) {
ha_warning("Failed to allocate memory to send sockets\n");
goto out;
}
if (fcntl(fd, F_SETFL, old_fcntl &~ O_NONBLOCK) == -1) {
ha_warning("Cannot make the unix socket blocking\n");
goto out;
}
setsockopt(fd, SOL_SOCKET, SO_RCVTIMEO, (void *)&tv, sizeof(tv));
iov.iov_base = &tot_fd_nb;
iov.iov_len = sizeof(tot_fd_nb);
if (!(strm_li(s)->bind_conf->level & ACCESS_FD_LISTENERS))
goto out;
memset(&msghdr, 0, sizeof(msghdr));
/*
* First, calculates the total number of FD, so that we can let
* the caller know how much he should expects.
*/
px = proxies_list;
while (px) {
struct listener *l;
list_for_each_entry(l, &px->conf.listeners, by_fe) {
/* Only transfer IPv4/IPv6/UNIX sockets */
if (l->state >= LI_ZOMBIE &&
(l->proto->sock_family == AF_INET ||
l->proto->sock_family == AF_INET6 ||
l->proto->sock_family == AF_UNIX))
tot_fd_nb++;
}
px = px->next;
}
prs = cfg_peers;
while (prs) {
if (prs->peers_fe) {
struct listener *l;
list_for_each_entry(l, &prs->peers_fe->conf.listeners, by_fe) {
/* Only transfer IPv4/IPv6/UNIX sockets */
if (l->state >= LI_ZOMBIE &&
(l->proto->sock_family == AF_INET ||
l->proto->sock_family == AF_INET6 ||
l->proto->sock_family == AF_UNIX))
tot_fd_nb++;
}
}
prs = prs->next;
}
if (tot_fd_nb == 0)
goto out;
/* First send the total number of file descriptors, so that the
* receiving end knows what to expect.
*/
msghdr.msg_iov = &iov;
msghdr.msg_iovlen = 1;
ret = sendmsg(fd, &msghdr, 0);
if (ret != sizeof(tot_fd_nb)) {
ha_warning("Failed to send the number of sockets to send\n");
goto out;
}
/* Now send the fds */
msghdr.msg_control = cmsgbuf;
msghdr.msg_controllen = CMSG_SPACE(sizeof(int) * MAX_SEND_FD);
cmsg = CMSG_FIRSTHDR(&msghdr);
cmsg->cmsg_len = CMSG_LEN(MAX_SEND_FD * sizeof(int));
cmsg->cmsg_level = SOL_SOCKET;
cmsg->cmsg_type = SCM_RIGHTS;
tmpfd = (int *)CMSG_DATA(cmsg);
/* For each socket, e message is sent, containing the following :
* Size of the namespace name (or 0 if none), as an unsigned char.
* The namespace name, if any
* Size of the interface name (or 0 if none), as an unsigned char
* The interface name, if any
* Listener options, as an int.
*/
/* We will send sockets MAX_SEND_FD per MAX_SEND_FD, allocate a
* buffer big enough to store the socket informations.
*/
tmpbuf = malloc(MAX_SEND_FD * (1 + MAXPATHLEN + 1 + IFNAMSIZ + sizeof(int)));
if (tmpbuf == NULL) {
ha_warning("Failed to allocate memory to transfer socket informations\n");
goto out;
}
iov.iov_base = tmpbuf;
px = proxies_list;
while (px) {
if (_getsocks_gen_send(px, fd, tmpfd, &iov,
tot_fd_nb, &i, &curoff, &msghdr) < 0)
goto out;
px = px->next;
}
/* should be done for peers too */
prs = cfg_peers;
while (prs) {
if (prs->peers_fe)
if (_getsocks_gen_send(prs->peers_fe, fd, tmpfd, &iov,
tot_fd_nb, &i, &curoff, &msghdr) < 0)
goto out;
prs = prs->next;
}
if (i % MAX_SEND_FD) {
iov.iov_len = curoff;
cmsg->cmsg_len = CMSG_LEN((i % MAX_SEND_FD) * sizeof(int));
msghdr.msg_controllen = CMSG_SPACE(sizeof(int) * (i % MAX_SEND_FD));
if (sendmsg(fd, &msghdr, 0) != curoff) {
ha_warning("Failed to transfer sockets\n");
goto out;
}
}
out:
if (fd >= 0 && old_fcntl >= 0 && fcntl(fd, F_SETFL, old_fcntl) == -1) {
ha_warning("Cannot make the unix socket non-blocking\n");
goto out;
}
appctx->st0 = CLI_ST_END;
free(cmsgbuf);
free(tmpbuf);
return 1;
}
static int cli_parse_simple(char **args, char *payload, struct appctx *appctx, void *private)
{
if (*args[0] == 'h')
/* help */
cli_gen_usage_msg(appctx);
else if (*args[0] == 'p')
/* prompt */
appctx->st1 ^= APPCTX_CLI_ST1_PROMPT;
else if (*args[0] == 'q')
/* quit */
appctx->st0 = CLI_ST_END;
return 1;
}
void pcli_write_prompt(struct stream *s)
{
struct buffer *msg = get_trash_chunk();
struct channel *oc = si_oc(&s->si[0]);
if (!(s->pcli_flags & PCLI_F_PROMPT))
return;
if (s->pcli_flags & PCLI_F_PAYLOAD) {
chunk_appendf(msg, "+ ");
} else {
if (s->pcli_next_pid == 0)
chunk_appendf(msg, "master%s> ",
(global.mode & MODE_MWORKER_WAIT) ? "[ReloadFailed]" : "");
else
chunk_appendf(msg, "%d> ", s->pcli_next_pid);
}
co_inject(oc, msg->area, msg->data);
}
/* The pcli_* functions are used for the CLI proxy in the master */
void pcli_reply_and_close(struct stream *s, const char *msg)
{
struct buffer *buf = get_trash_chunk();
chunk_initstr(buf, msg);
si_retnclose(&s->si[0], buf);
}
static enum obj_type *pcli_pid_to_server(int proc_pid)
{
struct mworker_proc *child;
/* return the CLI applet of the master */
if (proc_pid == 0)
return &cli_applet.obj_type;
list_for_each_entry(child, &proc_list, list) {
if (child->pid == proc_pid){
return &child->srv->obj_type;
}
}
return NULL;
}
/* Take a CLI prefix in argument (eg: @!1234 @master @1)
* Return:
* 0: master
* > 0: pid of a worker
* < 0: didn't find a worker
*/
static int pcli_prefix_to_pid(const char *prefix)
{
int proc_pid;
struct mworker_proc *child;
char *errtol = NULL;
if (*prefix != '@') /* not a prefix, should not happen */
return -1;
prefix++;
if (!*prefix) /* sent @ alone, return the master */
return 0;
if (strcmp("master", prefix) == 0) {
return 0;
} else if (*prefix == '!') {
prefix++;
if (!*prefix)
return -1;
proc_pid = strtol(prefix, &errtol, 10);
if (*errtol != '\0')
return -1;
list_for_each_entry(child, &proc_list, list) {
if (!(child->options & PROC_O_TYPE_WORKER))
continue;
if (child->pid == proc_pid){
return child->pid;
}
}
} else {
struct mworker_proc *chosen = NULL;
/* this is a relative pid */
proc_pid = strtol(prefix, &errtol, 10);
if (*errtol != '\0')
return -1;
if (proc_pid == 0) /* return the master */
return 0;
/* chose the right process, the current one is the one with the
least number of reloads */
list_for_each_entry(child, &proc_list, list) {
if (!(child->options & PROC_O_TYPE_WORKER))
continue;
if (child->relative_pid == proc_pid){
if (child->reloads == 0)
return child->pid;
else if (chosen == NULL || child->reloads < chosen->reloads)
chosen = child;
}
}
if (chosen)
return chosen->pid;
}
return -1;
}
/* Return::
* >= 0 : number of words to escape
* = -1 : error
*/
int pcli_find_and_exec_kw(struct stream *s, char **args, int argl, char **errmsg, int *next_pid)
{
if (argl < 1)
return 0;
/* there is a prefix */
if (args[0][0] == '@') {
int target_pid = pcli_prefix_to_pid(args[0]);
if (target_pid == -1) {
memprintf(errmsg, "Can't find the target PID matching the prefix '%s'\n", args[0]);
return -1;
}
/* if the prefix is alone, define a default target */
if (argl == 1)
s->pcli_next_pid = target_pid;
else
*next_pid = target_pid;
return 1;
} else if (!strcmp("prompt", args[0])) {
s->pcli_flags ^= PCLI_F_PROMPT;
return argl; /* return the number of elements in the array */
} else if (!strcmp("quit", args[0])) {
channel_shutr_now(&s->req);
channel_shutw_now(&s->res);
return argl; /* return the number of elements in the array */
} else if (!strcmp(args[0], "operator")) {
if (!pcli_has_level(s, ACCESS_LVL_OPER)) {
memprintf(errmsg, "Permission denied!\n");
return -1;
}
s->pcli_flags &= ~ACCESS_LVL_MASK;
s->pcli_flags |= ACCESS_LVL_OPER;
return argl;
} else if (!strcmp(args[0], "user")) {
if (!pcli_has_level(s, ACCESS_LVL_USER)) {
memprintf(errmsg, "Permission denied!\n");
return -1;
}
s->pcli_flags &= ~ACCESS_LVL_MASK;
s->pcli_flags |= ACCESS_LVL_USER;
return argl;
}
return 0;
}
/*
* Parse the CLI request:
* - It does basically the same as the cli_io_handler, but as a proxy
* - It can exec a command and strip non forwardable commands
*
* Return:
* - the number of characters to forward or
* - 1 if there is an error or not enough data
*/
int pcli_parse_request(struct stream *s, struct channel *req, char **errmsg, int *next_pid)
{
char *str = (char *)ci_head(req);
char *end = (char *)ci_stop(req);
char *args[MAX_STATS_ARGS + 1]; /* +1 for storing a NULL */
int argl; /* number of args */
char *p;
char *trim = NULL;
char *payload = NULL;
int wtrim = 0; /* number of words to trim */
int reql = 0;
int ret;
int i = 0;
p = str;
if (!(s->pcli_flags & PCLI_F_PAYLOAD)) {
/* Looks for the end of one command */
while (p+reql < end) {
/* handle escaping */
if (p[reql] == '\\') {
reql++;
continue;
}
if (p[reql] == ';' || p[reql] == '\n') {
/* found the end of the command */
p[reql] = '\n';
reql++;
break;
}
reql++;
}
} else {
while (p+reql < end) {
if (p[reql] == '\n') {
/* found the end of the line */
reql++;
break;
}
reql++;
}
}
/* set end to first byte after the end of the command */
end = p + reql;
/* there is no end to this command, need more to parse ! */
if (*(end-1) != '\n') {
return -1;
}
if (s->pcli_flags & PCLI_F_PAYLOAD) {
if (reql == 1) /* last line of the payload */
s->pcli_flags &= ~PCLI_F_PAYLOAD;
return reql;
}
*(end-1) = '\0';
/* splits the command in words */
while (i < MAX_STATS_ARGS && p < end) {
int j, k;
/* skip leading spaces/tabs */
p += strspn(p, " \t");
if (!*p)
break;
args[i] = p;
p += strcspn(p, " \t");
*p++ = 0;
/* unescape backslashes (\) */
for (j = 0, k = 0; args[i][k]; k++) {
if (args[i][k] == '\\') {
if (args[i][k + 1] == '\\')
k++;
else
continue;
}
args[i][j] = args[i][k];
j++;
}
args[i][j] = 0;
i++;
}
argl = i;
for (; i < MAX_STATS_ARGS + 1; i++)
args[i] = NULL;
wtrim = pcli_find_and_exec_kw(s, args, argl, errmsg, next_pid);
/* End of words are ending by \0, we need to replace the \0s by spaces
1 before forwarding them */
p = str;
while (p < end-1) {
if (*p == '\0')
*p = ' ';
p++;
}
payload = strstr(str, PAYLOAD_PATTERN);
if ((end - 1) == (payload + strlen(PAYLOAD_PATTERN))) {
/* if the payload pattern is at the end */
s->pcli_flags |= PCLI_F_PAYLOAD;
ret = reql;
}
*(end-1) = '\n';
if (wtrim > 0) {
trim = &args[wtrim][0];
if (trim == NULL) /* if this was the last word in the table */
trim = end;
b_del(&req->buf, trim - str);
ret = end - trim;
} else if (wtrim < 0) {
/* parsing error */
return -1;
} else {
/* the whole string */
ret = end - str;
}
if (ret > 1) {
if (pcli_has_level(s, ACCESS_LVL_ADMIN)) {
goto end;
} else if (pcli_has_level(s, ACCESS_LVL_OPER)) {
ci_insert_line2(req, 0, "operator -", strlen("operator -"));
ret += strlen("operator -") + 2;
} else if (pcli_has_level(s, ACCESS_LVL_USER)) {
ci_insert_line2(req, 0, "user -", strlen("user -"));
ret += strlen("user -") + 2;
}
}
end:
return ret;
}
int pcli_wait_for_request(struct stream *s, struct channel *req, int an_bit)
{
int next_pid = -1;
int to_forward;
char *errmsg = NULL;
if ((s->pcli_flags & ACCESS_LVL_MASK) == ACCESS_LVL_NONE)
s->pcli_flags |= strm_li(s)->bind_conf->level & ACCESS_LVL_MASK;
read_again:
/* if the channel is closed for read, we won't receive any more data
from the client, but we don't want to forward this close to the
server */
channel_dont_close(req);
/* We don't know yet to which server we will connect */
channel_dont_connect(req);
/* we are not waiting for a response, there is no more request and we
* receive a close from the client, we can leave */
if (!(ci_data(req)) && req->flags & CF_SHUTR) {
channel_shutw_now(&s->res);
s->req.analysers &= ~AN_REQ_WAIT_CLI;
return 1;
}
req->flags |= CF_READ_DONTWAIT;
/* need more data */
if (!ci_data(req))
return 0;
/* If there is data available for analysis, log the end of the idle time. */
if (c_data(req) && s->logs.t_idle == -1)
s->logs.t_idle = tv_ms_elapsed(&s->logs.tv_accept, &now) - s->logs.t_handshake;
to_forward = pcli_parse_request(s, req, &errmsg, &next_pid);
if (to_forward > 0) {
int target_pid;
/* enough data */
/* forward only 1 command */
channel_forward(req, to_forward);
if (!(s->pcli_flags & PCLI_F_PAYLOAD)) {
/* we send only 1 command per request, and we write close after it */
channel_shutw_now(req);
} else {
pcli_write_prompt(s);
}
s->res.flags |= CF_WAKE_ONCE; /* need to be called again */
/* remove the XFER_DATA analysers, which forwards all
* the data, we don't want to forward the next requests
* We need to add CF_FLT_ANALYZE to abort the forward too.
*/
req->analysers &= ~(AN_REQ_FLT_XFER_DATA|AN_REQ_WAIT_CLI);
req->analysers |= AN_REQ_FLT_END|CF_FLT_ANALYZE;
s->res.analysers |= AN_RES_WAIT_CLI;
if (!(s->flags & SF_ASSIGNED)) {
if (next_pid > -1)
target_pid = next_pid;
else
target_pid = s->pcli_next_pid;
/* we can connect now */
s->target = pcli_pid_to_server(target_pid);
s->flags |= (SF_DIRECT | SF_ASSIGNED);
channel_auto_connect(req);
}
} else if (to_forward == 0) {
/* we trimmed things but we might have other commands to consume */
pcli_write_prompt(s);
goto read_again;
} else if (to_forward == -1 && errmsg) {
/* there was an error during the parsing */
pcli_reply_and_close(s, errmsg);
return 0;
} else if (to_forward == -1 && channel_full(req, global.tune.maxrewrite)) {
/* buffer is full and we didn't catch the end of a command */
goto send_help;
}
return 0;
send_help:
b_reset(&req->buf);
b_putblk(&req->buf, "help\n", 5);
goto read_again;
}
int pcli_wait_for_response(struct stream *s, struct channel *rep, int an_bit)
{
struct proxy *fe = strm_fe(s);
struct proxy *be = s->be;
if (rep->flags & CF_READ_ERROR) {
pcli_reply_and_close(s, "Can't connect to the target CLI!\n");
s->res.analysers &= ~AN_RES_WAIT_CLI;
return 0;
}
rep->flags |= CF_READ_DONTWAIT; /* try to get back here ASAP */
rep->flags |= CF_NEVER_WAIT;
/* don't forward the close */
channel_dont_close(&s->res);
channel_dont_close(&s->req);
if (s->pcli_flags & PCLI_F_PAYLOAD) {
s->req.analysers |= AN_REQ_WAIT_CLI;
s->res.analysers &= ~AN_RES_WAIT_CLI;
s->req.flags |= CF_WAKE_ONCE; /* need to be called again if there is some command left in the request */
return 0;
}
/* forward the data */
if (ci_data(rep)) {
c_adv(rep, ci_data(rep));
return 0;
}
if ((rep->flags & (CF_SHUTR|CF_READ_NULL))) {
/* stream cleanup */
pcli_write_prompt(s);
s->si[1].flags |= SI_FL_NOLINGER | SI_FL_NOHALF;
si_shutr(&s->si[1]);
si_shutw(&s->si[1]);
/*
* starting from there this the same code as
* http_end_txn_clean_session().
*
* It allows to do frontend keepalive while reconnecting to a
* new server for each request.
*/
if (s->flags & SF_BE_ASSIGNED) {
HA_ATOMIC_SUB(&be->beconn, 1);
if (unlikely(s->srv_conn))
sess_change_server(s, NULL);
}
s->logs.t_close = tv_ms_elapsed(&s->logs.tv_accept, &now);
stream_process_counters(s);
/* don't count other requests' data */
s->logs.bytes_in -= ci_data(&s->req);
s->logs.bytes_out -= ci_data(&s->res);
/* we may need to know the position in the queue */
pendconn_free(s);
/* let's do a final log if we need it */
if (!LIST_ISEMPTY(&fe->logformat) && s->logs.logwait &&
!(s->flags & SF_MONITOR) &&
(!(fe->options & PR_O_NULLNOLOG) || s->req.total)) {
s->do_log(s);
}
/* stop tracking content-based counters */
stream_stop_content_counters(s);
stream_update_time_stats(s);
s->logs.accept_date = date; /* user-visible date for logging */
s->logs.tv_accept = now; /* corrected date for internal use */
s->logs.t_handshake = 0; /* There are no handshake in keep alive connection. */
s->logs.t_idle = -1;
tv_zero(&s->logs.tv_request);
s->logs.t_queue = -1;
s->logs.t_connect = -1;
s->logs.t_data = -1;
s->logs.t_close = 0;
s->logs.prx_queue_pos = 0; /* we get the number of pending conns before us */
s->logs.srv_queue_pos = 0; /* we will get this number soon */
s->logs.bytes_in = s->req.total = ci_data(&s->req);
s->logs.bytes_out = s->res.total = ci_data(&s->res);
stream_del_srv_conn(s);
if (objt_server(s->target)) {
if (s->flags & SF_CURR_SESS) {
s->flags &= ~SF_CURR_SESS;
HA_ATOMIC_SUB(&__objt_server(s->target)->cur_sess, 1);
}
if (may_dequeue_tasks(__objt_server(s->target), be))
process_srv_queue(__objt_server(s->target));
}
s->target = NULL;
/* only release our endpoint if we don't intend to reuse the
* connection.
*/
if (!si_conn_ready(&s->si[1])) {
si_release_endpoint(&s->si[1]);
s->srv_conn = NULL;
}
sockaddr_free(&s->target_addr);
s->si[1].state = s->si[1].prev_state = SI_ST_INI;
s->si[1].err_type = SI_ET_NONE;
s->si[1].conn_retries = 0; /* used for logging too */
s->si[1].exp = TICK_ETERNITY;
s->si[1].flags &= SI_FL_ISBACK | SI_FL_DONT_WAKE; /* we're in the context of process_stream */
s->req.flags &= ~(CF_SHUTW|CF_SHUTW_NOW|CF_AUTO_CONNECT|CF_WRITE_ERROR|CF_STREAMER|CF_STREAMER_FAST|CF_NEVER_WAIT|CF_WROTE_DATA);
s->res.flags &= ~(CF_SHUTR|CF_SHUTR_NOW|CF_READ_ATTACHED|CF_READ_ERROR|CF_READ_NOEXP|CF_STREAMER|CF_STREAMER_FAST|CF_WRITE_PARTIAL|CF_NEVER_WAIT|CF_WROTE_DATA|CF_READ_NULL);
s->flags &= ~(SF_DIRECT|SF_ASSIGNED|SF_ADDR_SET|SF_BE_ASSIGNED|SF_FORCE_PRST|SF_IGNORE_PRST);
s->flags &= ~(SF_CURR_SESS|SF_REDIRECTABLE|SF_SRV_REUSED);
s->flags &= ~(SF_ERR_MASK|SF_FINST_MASK|SF_REDISP);
/* reinitialise the current rule list pointer to NULL. We are sure that
* any rulelist match the NULL pointer.
*/
s->current_rule_list = NULL;
s->be = strm_fe(s);
s->logs.logwait = strm_fe(s)->to_log;
s->logs.level = 0;
stream_del_srv_conn(s);
s->target = NULL;
/* re-init store persistence */
s->store_count = 0;
s->uniq_id = global.req_count++;
s->req.flags |= CF_READ_DONTWAIT; /* one read is usually enough */
s->req.flags |= CF_WAKE_ONCE; /* need to be called again if there is some command left in the request */
s->req.analysers |= AN_REQ_WAIT_CLI;
s->res.analysers &= ~AN_RES_WAIT_CLI;
/* We must trim any excess data from the response buffer, because we
* may have blocked an invalid response from a server that we don't
* want to accidently forward once we disable the analysers, nor do
* we want those data to come along with next response. A typical
* example of such data would be from a buggy server responding to
* a HEAD with some data, or sending more than the advertised
* content-length.
*/
if (unlikely(ci_data(&s->res)))
b_set_data(&s->res.buf, co_data(&s->res));
/* Now we can realign the response buffer */
c_realign_if_empty(&s->res);
s->req.rto = strm_fe(s)->timeout.client;
s->req.wto = TICK_ETERNITY;
s->res.rto = TICK_ETERNITY;
s->res.wto = strm_fe(s)->timeout.client;
s->req.rex = TICK_ETERNITY;
s->req.wex = TICK_ETERNITY;
s->req.analyse_exp = TICK_ETERNITY;
s->res.rex = TICK_ETERNITY;
s->res.wex = TICK_ETERNITY;
s->res.analyse_exp = TICK_ETERNITY;
s->si[1].hcto = TICK_ETERNITY;
/* we're removing the analysers, we MUST re-enable events detection.
* We don't enable close on the response channel since it's either
* already closed, or in keep-alive with an idle connection handler.
*/
channel_auto_read(&s->req);
channel_auto_close(&s->req);
channel_auto_read(&s->res);
return 1;
}
return 0;
}
/*
* The mworker functions are used to initialize the CLI in the master process
*/
/*
* Stop the mworker proxy
*/
void mworker_cli_proxy_stop()
{
if (mworker_proxy)
stop_proxy(mworker_proxy);
}
/*
* Create the mworker CLI proxy
*/
int mworker_cli_proxy_create()
{
struct mworker_proc *child;
char *msg = NULL;
char *errmsg = NULL;
mworker_proxy = calloc(1, sizeof(*mworker_proxy));
if (!mworker_proxy)
return -1;
init_new_proxy(mworker_proxy);
mworker_proxy->next = proxies_list;
proxies_list = mworker_proxy;
mworker_proxy->id = strdup("MASTER");
mworker_proxy->mode = PR_MODE_CLI;
mworker_proxy->state = PR_STNEW;
mworker_proxy->last_change = now.tv_sec;
mworker_proxy->cap = PR_CAP_LISTEN; /* this is a listen section */
mworker_proxy->maxconn = 10; /* default to 10 concurrent connections */
mworker_proxy->timeout.client = 0; /* no timeout */
mworker_proxy->conf.file = strdup("MASTER");
mworker_proxy->conf.line = 0;
mworker_proxy->accept = frontend_accept;
mworker_proxy-> lbprm.algo = BE_LB_ALGO_NONE;
/* Does not init the default target the CLI applet, but must be done in
* the request parsing code */
mworker_proxy->default_target = NULL;
/* the check_config_validity() will get an ID for the proxy */
mworker_proxy->uuid = -1;
proxy_store_name(mworker_proxy);
/* create all servers using the mworker_proc list */
list_for_each_entry(child, &proc_list, list) {
struct server *newsrv = NULL;
struct sockaddr_storage *sk;
int port1, port2, port;
struct protocol *proto;
/* only the workers support the master CLI */
if (!(child->options & PROC_O_TYPE_WORKER))
continue;
newsrv = new_server(mworker_proxy);
if (!newsrv)
goto error;
/* we don't know the new pid yet */
if (child->pid == -1)
memprintf(&msg, "cur-%d", child->relative_pid);
else
memprintf(&msg, "old-%d", child->pid);
newsrv->next = mworker_proxy->srv;
mworker_proxy->srv = newsrv;
newsrv->conf.file = strdup(msg);
newsrv->id = strdup(msg);
newsrv->conf.line = 0;
memprintf(&msg, "sockpair@%d", child->ipc_fd[0]);
if ((sk = str2sa_range(msg, &port, &port1, &port2, &errmsg, NULL, NULL, 0)) == 0) {
goto error;
}
free(msg);
msg = NULL;
proto = protocol_by_family(sk->ss_family);
if (!proto || !proto->connect) {
goto error;
}
/* no port specified */
newsrv->flags |= SRV_F_MAPPORTS;
newsrv->addr = *sk;
/* don't let the server participate to load balancing */
newsrv->iweight = 0;
newsrv->uweight = 0;
srv_lb_commit_status(newsrv);
child->srv = newsrv;
}
return 0;
error:
ha_alert("%s\n", errmsg);
list_for_each_entry(child, &proc_list, list) {
free((char *)child->srv->conf.file); /* cast because of const char * */
free(child->srv->id);
free(child->srv);
child->srv = NULL;
}
free(mworker_proxy->id);
free(mworker_proxy->conf.file);
free(mworker_proxy);
mworker_proxy = NULL;
free(errmsg);
free(msg);
return -1;
}
/*
* Create a new listener for the master CLI proxy
*/
int mworker_cli_proxy_new_listener(char *line)
{
struct bind_conf *bind_conf;
struct listener *l;
char *err = NULL;
char *args[MAX_LINE_ARGS + 1];
int arg;
int cur_arg;
arg = 1;
args[0] = line;
/* args is a bind configuration with spaces replaced by commas */
while (*line && arg < MAX_LINE_ARGS) {
if (*line == ',') {
*line++ = '\0';
while (*line == ',')
line++;
args[arg++] = line;
}
line++;
}
args[arg] = "\0";
bind_conf = bind_conf_alloc(mworker_proxy, "master-socket", 0, "", xprt_get(XPRT_RAW));
if (!bind_conf)
goto err;
bind_conf->level &= ~ACCESS_LVL_MASK;
bind_conf->level |= ACCESS_LVL_ADMIN;
if (!str2listener(args[0], mworker_proxy, bind_conf, "master-socket", 0, &err)) {
ha_alert("Cannot create the listener of the master CLI\n");
goto err;
}
cur_arg = 1;
while (*args[cur_arg]) {
static int bind_dumped;
struct bind_kw *kw;
kw = bind_find_kw(args[cur_arg]);
if (kw) {
if (!kw->parse) {
memprintf(&err, "'%s %s' : '%s' option is not implemented in this version (check build options).",
args[0], args[1], args[cur_arg]);
goto err;
}
if (kw->parse(args, cur_arg, global.stats_fe, bind_conf, &err) != 0) {
if (err)
memprintf(&err, "'%s %s' : '%s'", args[0], args[1], err);
else
memprintf(&err, "'%s %s' : error encountered while processing '%s'",
args[0], args[1], args[cur_arg]);
goto err;
}
cur_arg += 1 + kw->skip;
continue;
}
if (!bind_dumped) {
bind_dump_kws(&err);
indent_msg(&err, 4);
bind_dumped = 1;
}
memprintf(&err, "'%s %s' : unknown keyword '%s'.%s%s",
args[0], args[1], args[cur_arg],
err ? " Registered keywords :" : "", err ? err : "");
goto err;
}
list_for_each_entry(l, &bind_conf->listeners, by_bind) {
l->accept = session_accept_fd;
l->default_target = mworker_proxy->default_target;
/* don't make the peers subject to global limits and don't close it in the master */
l->options |= (LI_O_UNLIMITED|LI_O_MWORKER); /* we are keeping this FD in the master */
l->nice = -64; /* we want to boost priority for local stats */
global.maxsock++; /* for the listening socket */
}
global.maxsock += mworker_proxy->maxconn;
return 0;
err:
ha_alert("%s\n", err);
free(err);
free(bind_conf);
return -1;
}
/*
* Create a new CLI socket using a socketpair for a worker process
* <mworker_proc> is the process structure, and <proc> is the process number
*/
int mworker_cli_sockpair_new(struct mworker_proc *mworker_proc, int proc)
{
struct bind_conf *bind_conf;
struct listener *l;
char *path = NULL;
char *err = NULL;
/* master pipe to ensure the master is still alive */
if (socketpair(AF_UNIX, SOCK_STREAM, 0, mworker_proc->ipc_fd) < 0) {
ha_alert("Cannot create worker socketpair.\n");
return -1;
}
/* XXX: we might want to use a separate frontend at some point */
if (!global.stats_fe) {
if ((global.stats_fe = alloc_stats_fe("GLOBAL", "master-socket", 0)) == NULL) {
ha_alert("out of memory trying to allocate the stats frontend");
goto error;
}
}
bind_conf = bind_conf_alloc(global.stats_fe, "master-socket", 0, "", xprt_get(XPRT_RAW));
if (!bind_conf)
goto error;
bind_conf->level &= ~ACCESS_LVL_MASK;
bind_conf->level |= ACCESS_LVL_ADMIN; /* TODO: need to lower the rights with a CLI keyword*/
bind_conf->bind_proc = 1UL << proc;
global.stats_fe->bind_proc = 0; /* XXX: we should be careful with that, it can be removed by configuration */
if (!memprintf(&path, "sockpair@%d", mworker_proc->ipc_fd[1])) {
ha_alert("Cannot allocate listener.\n");
goto error;
}
if (!str2listener(path, global.stats_fe, bind_conf, "master-socket", 0, &err)) {
free(path);
ha_alert("Cannot create a CLI sockpair listener for process #%d\n", proc);
goto error;
}
free(path);
path = NULL;
list_for_each_entry(l, &bind_conf->listeners, by_bind) {
l->accept = session_accept_fd;
l->default_target = global.stats_fe->default_target;
l->options |= (LI_O_UNLIMITED | LI_O_NOSTOP);
/* it's a sockpair but we don't want to keep the fd in the master */
l->options &= ~LI_O_INHERITED;
l->nice = -64; /* we want to boost priority for local stats */
global.maxsock++; /* for the listening socket */
}
return 0;
error:
close(mworker_proc->ipc_fd[0]);
close(mworker_proc->ipc_fd[1]);
free(err);
return -1;
}
static struct applet cli_applet = {
.obj_type = OBJ_TYPE_APPLET,
.name = "<CLI>", /* used for logging */
.fct = cli_io_handler,
.release = cli_release_handler,
};
/* register cli keywords */
static struct cli_kw_list cli_kws = {{ },{
{ { "help", NULL }, NULL, cli_parse_simple, NULL },
{ { "prompt", NULL }, NULL, cli_parse_simple, NULL },
{ { "quit", NULL }, NULL, cli_parse_simple, NULL },
{ { "set", "maxconn", "global", NULL }, "set maxconn global : change the per-process maxconn setting", cli_parse_set_maxconn_global, NULL },
{ { "set", "rate-limit", NULL }, "set rate-limit : change a rate limiting value", cli_parse_set_ratelimit, NULL },
{ { "set", "severity-output", NULL }, "set severity-output [none|number|string] : set presence of severity level in feedback information", cli_parse_set_severity_output, NULL, NULL },
{ { "set", "timeout", NULL }, "set timeout : change a timeout setting", cli_parse_set_timeout, NULL, NULL },
{ { "show", "env", NULL }, "show env [var] : dump environment variables known to the process", cli_parse_show_env, cli_io_handler_show_env, NULL },
{ { "show", "cli", "sockets", NULL }, "show cli sockets : dump list of cli sockets", cli_parse_default, cli_io_handler_show_cli_sock, NULL, NULL, ACCESS_MASTER },
{ { "show", "cli", "level", NULL }, "show cli level : display the level of the current CLI session", cli_parse_show_lvl, NULL, NULL, NULL, ACCESS_MASTER},
{ { "show", "fd", NULL }, "show fd [num] : dump list of file descriptors in use", cli_parse_show_fd, cli_io_handler_show_fd, NULL },
{ { "show", "activity", NULL }, "show activity : show per-thread activity stats (for support/developers)", cli_parse_default, cli_io_handler_show_activity, NULL },
{ { "operator", NULL }, "operator : lower the level of the current CLI session to operator", cli_parse_set_lvl, NULL, NULL, NULL, ACCESS_MASTER},
{ { "user", NULL }, "user : lower the level of the current CLI session to user", cli_parse_set_lvl, NULL, NULL, NULL, ACCESS_MASTER},
{ { "_getsocks", NULL }, NULL, _getsocks, NULL },
{ { "expert-mode", NULL }, NULL, cli_parse_expert_mode, NULL }, // not listed
{{},}
}};
INITCALL1(STG_REGISTER, cli_register_kw, &cli_kws);
static struct cfg_kw_list cfg_kws = {ILH, {
{ CFG_GLOBAL, "stats", stats_parse_global },
{ 0, NULL, NULL },
}};
INITCALL1(STG_REGISTER, cfg_register_keywords, &cfg_kws);
static struct bind_kw_list bind_kws = { "STAT", { }, {
{ "level", bind_parse_level, 1 }, /* set the unix socket admin level */
{ "expose-fd", bind_parse_expose_fd, 1 }, /* set the unix socket expose fd rights */
{ "severity-output", bind_parse_severity_output, 1 }, /* set the severity output format */
{ NULL, NULL, 0 },
}};
INITCALL1(STG_REGISTER, bind_register_keywords, &bind_kws);
/*
* Local variables:
* c-indent-level: 8
* c-basic-offset: 8
* End:
*/