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Attach to every upstream pool in proxy mode all the time and fail over and back as needed

master
Con Kolivas 10 years ago
parent
52cd066563
commit
b7e71e1be7
2 changed files with 213 additions and 246 deletions
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  1. 438
      src/generator.c
  2. 3
      src/stratifier.c

438
src/generator.c
Unescape View File

@ -75,8 +75,7 @@ typedef struct proxy_instance proxy_instance_t;
/* Per proxied pool instance data */
struct proxy_instance {
proxy_instance_t *next;
proxy_instance_t *prev;
UT_hash_handle hh;
ckpool_t *ckp;
connsock_t *cs;
@ -104,6 +103,7 @@ struct proxy_instance {
bool notified; /* Received new template for work */
bool diffed; /* Received new diff */
bool reconnect; /* We need to drop and reconnect */
bool alive;
pthread_mutex_t notify_lock;
notify_instance_t *notify_instances;
@ -128,7 +128,7 @@ struct proxy_instance {
/* Private data for the generator */
struct generator_data {
pthread_mutex_t lock; /* Lock protecting linked lists */
proxy_instance_t *proxy_list; /* Linked list of all active proxies */
proxy_instance_t *proxies; /* Hash list of all proxies */
int proxy_notify_id; // Globally increasing notify id
ckmsgq_t *srvchk; // Server check message queue
};
@ -878,6 +878,8 @@ static bool send_pong(proxy_instance_t *proxi, json_t *val)
return ret;
}
static void prepare_proxy(proxy_instance_t *proxi);
static bool parse_reconnect(proxy_instance_t *proxi, json_t *val)
{
server_instance_t *newsi, *si = proxi->si;
@ -930,6 +932,7 @@ static bool parse_reconnect(proxy_instance_t *proxi, json_t *val)
newsi = ckzalloc(sizeof(server_instance_t));
mutex_lock(&gdata->lock);
HASH_DEL(gdata->proxies, proxi);
newsi->id = si->id; /* Inherit the old connection's id */
si->id = ckp->proxies++; /* Give the old connection the lowest id */
ckp->servers = realloc(ckp->servers, sizeof(server_instance_t *) * ckp->proxies);
@ -946,7 +949,12 @@ static bool parse_reconnect(proxy_instance_t *proxi, json_t *val)
newproxi->si = newsi;
newproxi->ckp = ckp;
newproxi->cs = &newsi->cs;
newproxi->id = newsi->id;
HASH_ADD_INT(gdata->proxies, id, proxi);
HASH_ADD_INT(gdata->proxies, id, newproxi);
mutex_unlock(&gdata->lock);
prepare_proxy(newproxi);
out:
return ret;
}
@ -1248,85 +1256,6 @@ out:
return ret;
}
static void *proxy_recv(void *arg)
{
proxy_instance_t *proxi = (proxy_instance_t *)arg;
connsock_t *cs = proxi->cs;
ckpool_t *ckp = proxi->ckp;
rename_proc("proxyrecv");
while (42) {
notify_instance_t *ni, *tmp;
share_msg_t *share, *tmpshare;
int retries = 0, ret;
time_t now;
now = time(NULL);
/* Age old notifications older than 10 mins old */
mutex_lock(&proxi->notify_lock);
HASH_ITER(hh, proxi->notify_instances, ni, tmp) {
if (HASH_COUNT(proxi->notify_instances) < 3)
break;
if (ni->notify_time < now - 600) {
HASH_DEL(proxi->notify_instances, ni);
clear_notify(ni);
}
}
mutex_unlock(&proxi->notify_lock);
/* Similary with shares older than 2 mins without response */
mutex_lock(&proxi->share_lock);
HASH_ITER(hh, proxi->shares, share, tmpshare) {
if (share->submit_time < now - 120) {
HASH_DEL(proxi->shares, share);
}
}
mutex_unlock(&proxi->share_lock);
/* If we don't get an update within 10 minutes the upstream pool
* has likely stopped responding. */
do {
if (cs->fd == -1) {
ret = -1;
break;
}
ret = read_socket_line(cs, 5);
} while (ret == 0 && ++retries < 120);
if (ret < 1) {
/* Send ourselves a reconnect message */
LOGWARNING("Failed to read_socket_line in proxy_recv, attempting reconnect");
send_proc(ckp->generator, "reconnect");
break;
}
if (parse_method(proxi, cs->buf)) {
if (proxi->notified) {
send_proc(ckp->stratifier, "notify");
proxi->notified = false;
}
if (proxi->diffed) {
send_proc(ckp->stratifier, "diff");
proxi->diffed = false;
}
if (proxi->reconnect) {
proxi->reconnect = false;
LOGWARNING("Reconnect issue, dropping existing connection");
send_proc(ckp->generator, "reconnect");
break;
}
continue;
}
if (parse_share(proxi, cs->buf)) {
continue;
}
/* If it's not a method it should be a share result */
LOGWARNING("Unhandled stratum message: %s", cs->buf);
}
return NULL;
}
/* For processing and sending shares */
static void *proxy_send(void *arg)
{
@ -1384,36 +1313,6 @@ static void *proxy_send(void *arg)
return NULL;
}
/* For receiving messages from an upstream pool to pass downstream */
static void *passthrough_recv(void *arg)
{
proxy_instance_t *proxi = (proxy_instance_t *)arg;
connsock_t *cs = proxi->cs;
ckpool_t *ckp = proxi->ckp;
rename_proc("passrecv");
while (42) {
int ret;
do {
ret = read_socket_line(cs, 60);
} while (ret == 0);
if (ret < 1) {
/* Send ourselves a reconnect message */
LOGWARNING("Failed to read_socket_line in proxy_recv, attempting reconnect");
send_proc(ckp->generator, "reconnect");
break;
}
/* Simply forward the message on, as is, to the connector to
* process. Possibly parse parameters sent by upstream pool
* here */
send_proc(ckp->connector, cs->buf);
}
return NULL;
}
static void passthrough_send(ckpool_t __maybe_unused *ckp, pass_msg_t *pm)
{
int len, sent;
@ -1491,124 +1390,238 @@ out:
return ret;
}
/* Cycle through the available proxies and find the first alive one */
static proxy_instance_t *live_proxy(ckpool_t *ckp)
/* For receiving messages from an upstream pool to pass downstream. Responsible
* for setting up the connection and testing pool is live. */
static void *passthrough_recv(void *arg)
{
proxy_instance_t *alive = NULL;
gdata_t *gdata = ckp->data;
connsock_t *cs;
int i, srvs;
LOGDEBUG("Attempting to connect to proxy");
retry:
if (!ping_main(ckp))
goto out;
mutex_lock(&gdata->lock);
srvs = ckp->proxies;
mutex_unlock(&gdata->lock);
for (i = 0; i < srvs; i++) {
proxy_instance_t *proxi;
server_instance_t *si;
proxy_instance_t *proxi = (proxy_instance_t *)arg;
server_instance_t *si = proxi->si;
connsock_t *cs = proxi->cs;
ckpool_t *ckp = proxi->ckp;
mutex_lock(&gdata->lock);
si = ckp->servers[i];
proxi = si->data;
mutex_unlock(&gdata->lock);
rename_proc("passrecv");
cs = proxi->cs;
if (proxy_alive(ckp, si, proxi, cs, false)) {
alive = proxi;
break;
proxi->alive = true;
send_proc(ckp->generator, "reconnect");
LOGWARNING("Proxy %d:%s connection established",
proxi->id, proxi->si->url);
}
while (42) {
int ret;
while (!proxy_alive(ckp, si, proxi, cs, true)) {
if (proxi->alive) {
proxi->alive = false;
send_proc(ckp->generator, "reconnect");
}
if (!alive) {
send_proc(ckp->connector, "reject");
send_proc(ckp->stratifier, "dropall");
LOGWARNING("Failed to connect to any servers as proxy, retrying in 5s!");
sleep(5);
goto retry;
}
if (!proxi->alive) {
proxi->alive = true;
send_proc(ckp->generator, "reconnect");
}
cs = alive->cs;
LOGNOTICE("Connected to upstream server %s:%s as proxy%s", cs->url, cs->port,
ckp->passthrough ? " in passthrough mode" : "");
if (ckp->passthrough) {
create_pthread(&alive->pth_precv, passthrough_recv, alive);
alive->passsends = create_ckmsgq(ckp, "passsend", &passthrough_send);
} else {
create_pthread(&alive->pth_precv, proxy_recv, alive);
mutex_init(&alive->psend_lock);
cond_init(&alive->psend_cond);
create_pthread(&alive->pth_psend, proxy_send, alive);
do {
ret = read_socket_line(cs, 60);
} while (ret == 0);
if (ret < 1) {
LOGWARNING("Failed to read_socket_line in proxy_recv, attempting reconnect");
continue;
}
out:
send_proc(ckp->connector, alive ? "accept" : "reject");
return alive;
/* Simply forward the message on, as is, to the connector to
* process. Possibly parse parameters sent by upstream pool
* here */
send_proc(ckp->connector, cs->buf);
}
return NULL;
}
static void kill_proxy(proxy_instance_t *proxi)
/* For receiving messages from the upstream proxy, also responsible for setting
* up the connection and testing it's alive. */
static void *proxy_recv(void *arg)
{
proxy_instance_t *proxi = (proxy_instance_t *)arg;
server_instance_t *si = proxi->si;
connsock_t *cs = proxi->cs;
ckpool_t *ckp = proxi->ckp;
rename_proc("proxyrecv");
if (proxy_alive(ckp, si, proxi, cs, false)) {
proxi->alive = true;
send_proc(ckp->generator, "reconnect");
LOGWARNING("Proxy %d:%s connection established",
proxi->id, proxi->si->url);
}
while (42) {
notify_instance_t *ni, *tmp;
connsock_t *cs;
share_msg_t *share, *tmpshare;
int retries = 0, ret;
time_t now;
if (!proxi) // This shouldn't happen
return;
while (!proxy_alive(ckp, si, proxi, cs, true)) {
if (proxi->alive) {
proxi->alive = false;
send_proc(ckp->generator, "reconnect");
}
sleep(5);
}
if (!proxi->alive) {
proxi->alive = true;
send_proc(ckp->generator, "reconnect");
}
LOGNOTICE("Killing proxy connection to %s", proxi->si->url);
cs = proxi->cs;
Close(cs->fd);
empty_buffer(cs);
now = time(NULL);
/* All our notify data is invalid if we reconnect so discard them */
/* Age old notifications older than 10 mins old */
mutex_lock(&proxi->notify_lock);
HASH_ITER(hh, proxi->notify_instances, ni, tmp) {
if (HASH_COUNT(proxi->notify_instances) < 3)
break;
if (ni->notify_time < now - 600) {
HASH_DEL(proxi->notify_instances, ni);
clear_notify(ni);
}
}
mutex_unlock(&proxi->notify_lock);
pthread_cancel(proxi->pth_precv);
pthread_cancel(proxi->pth_psend);
/* Similary with shares older than 2 mins without response */
mutex_lock(&proxi->share_lock);
HASH_ITER(hh, proxi->shares, share, tmpshare) {
if (share->submit_time < now - 120) {
HASH_DEL(proxi->shares, share);
}
}
mutex_unlock(&proxi->share_lock);
/* If we don't get an update within 10 minutes the upstream pool
* has likely stopped responding. */
do {
if (cs->fd == -1) {
ret = -1;
break;
}
ret = read_socket_line(cs, 5);
} while (ret == 0 && ++retries < 120);
if (ret < 1) {
/* Send ourselves a reconnect message */
LOGWARNING("Failed to read_socket_line in proxy_recv, attempting reconnect");
continue;
}
if (parse_method(proxi, cs->buf)) {
if (proxi->notified) {
send_proc(ckp->stratifier, "notify");
proxi->notified = false;
}
if (proxi->diffed) {
send_proc(ckp->stratifier, "diff");
proxi->diffed = false;
}
if (proxi->reconnect) {
proxi->reconnect = false;
LOGWARNING("Proxy %d:%s reconnect issue, dropping existing connection",
proxi->id, proxi->si->url);
send_proc(ckp->generator, "reconnect");
break;
}
continue;
}
if (parse_share(proxi, cs->buf)) {
continue;
}
/* If it's not a method it should be a share result */
LOGWARNING("Unhandled stratum message: %s", cs->buf);
}
return NULL;
}
static void prepare_proxy(proxy_instance_t *proxi)
{
mutex_init(&proxi->psend_lock);
cond_init(&proxi->psend_cond);
create_pthread(&proxi->pth_psend, proxy_send, proxi);
create_pthread(&proxi->pth_precv, proxy_recv, proxi);
}
static void setup_proxies(ckpool_t *ckp, gdata_t *gdata)
{
int i;
for (i = 0; i < ckp->proxies; i++) {
proxy_instance_t *proxi;
server_instance_t *si;
si = ckp->servers[i];
proxi = si->data;
proxi->id = i;
HASH_ADD_INT(gdata->proxies, id, proxi);
if (ckp->passthrough) {
create_pthread(&proxi->pth_precv, passthrough_recv, proxi);
proxi->passsends = create_ckmsgq(ckp, "passsend", &passthrough_send);
} else {
prepare_proxy(proxi);
}
}
}
static proxy_instance_t *current_proxy(ckpool_t *ckp, gdata_t *gdata)
{
proxy_instance_t *ret = NULL, *proxi, *tmp;
while (42) {
if (!ping_main(ckp))
break;
HASH_ITER(hh, gdata->proxies, proxi, tmp) {
if (proxi->alive) {
if (!ret) {
ret = proxi;
continue;
}
if (proxi->id < ret->id)
ret = proxi;
}
}
if (ret)
break;
sleep(1);
}
send_proc(ckp->connector, ret ? "accept" : "reject");
return ret;
}
static int proxy_loop(proc_instance_t *pi)
{
proxy_instance_t *proxi = NULL, *cproxy;
int sockd = -1, ret = 0, selret;
proxy_instance_t *proxi = NULL;
bool reconnecting = false;
unixsock_t *us = &pi->us;
ckpool_t *ckp = pi->ckp;
gdata_t *gdata = ckp->data;
char *buf = NULL;
setup_proxies(ckp, gdata);
reconnect:
if (proxi) {
kill_proxy(proxi);
reconnecting = true;
}
proxi = live_proxy(ckp);
if (!proxi)
/* This does not necessarily mean we reconnect, but a change has
* occurred and we need to reexamine the proxies. */
cproxy = current_proxy(ckp, gdata);
if (!cproxy)
goto out;
if (reconnecting) {
reconnecting = false;
if (proxi != cproxy) {
proxi = cproxy;
if (!ckp->passthrough) {
connsock_t *cs = proxi->cs;
LOGWARNING("Successfully reconnected to %s:%s as proxy",
LOGWARNING("Successfully connected to %s:%s as proxy",
cs->url, cs->port);
}
/* We've just subscribed and authorised so tell the stratifier to
* retrieve the first subscription. */
if (!ckp->passthrough) {
/* Sending subscribe implies stratifier will also do a notify */
send_proc(ckp->stratifier, "subscribe");
send_proc(ckp->stratifier, "notify");
proxi->notified = false;
}
}
retry:
ckmsgq_add(gdata->srvchk, proxi->si);
do {
selret = wait_read_select(us->sockd, 5);
if (!selret && !ping_main(ckp)) {
@ -1670,7 +1683,6 @@ retry:
Close(sockd);
goto retry;
out:
kill_proxy(proxi);
Close(sockd);
return ret;
}
@ -1793,53 +1805,6 @@ static void server_watchdog(ckpool_t *ckp, server_instance_t *cursi)
send_proc(ckp->generator, "reconnect");
}
static void proxy_watchdog(ckpool_t *ckp, server_instance_t *cursi)
{
gdata_t *gdata = ckp->data;
static time_t last_t = 0;
bool alive = false;
time_t now_t;
int i, srvs;
/* Rate limit to checking only once every 5 seconds */
now_t = time(NULL);
if (now_t <= last_t + 5)
return;
last_t = now_t;
/* Is this the highest priority server already? */
if (!cursi->id)
return;
mutex_lock(&gdata->lock);
srvs = ckp->proxies;
mutex_unlock(&gdata->lock);
for (i = 0; i < srvs; i++) {
proxy_instance_t *proxi;
server_instance_t *si;
connsock_t *cs;
mutex_lock(&gdata->lock);
si = ckp->servers[i];
proxi = si->data;
mutex_unlock(&gdata->lock);
/* Have we reached the current server? */
if (si == cursi)
return;
cs = proxi->cs;
alive = proxy_alive(ckp, si, proxi, cs, true);
if (alive)
break;
}
if (alive)
send_proc(ckp->generator, "reconnect");
}
int generator(proc_instance_t *pi)
{
ckpool_t *ckp = pi->ckp;
@ -1850,7 +1815,6 @@ int generator(proc_instance_t *pi)
gdata = ckzalloc(sizeof(gdata_t));
ckp->data = gdata;
if (ckp->proxy) {
gdata->srvchk = create_ckmsgq(ckp, "prxchk", &proxy_watchdog);
ret = proxy_mode(ckp, pi);
} else {
gdata->srvchk = create_ckmsgq(ckp, "srvchk", &server_watchdog);

3
src/stratifier.c
Unescape View File

@ -1006,6 +1006,7 @@ static proxy_t *proxy_by_id(sdata_t *sdata, const int id)
return proxy;
}
static void update_notify(ckpool_t *ckp);
static void reconnect_clients(sdata_t *sdata, const char *cmd);
static void update_subscribe(ckpool_t *ckp)
@ -1068,6 +1069,8 @@ static void update_subscribe(ckpool_t *ckp)
proxy->nonce2len, 1ll << (proxy->enonce1varlen * 8));
json_decref(val);
/* Notify implied required now too */
update_notify(ckp);
reconnect_clients(sdata, "");
}

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