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prot.c
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prot.c
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/* prot.c - protocol implementation */
/* Copyright (C) 2007 Keith Rarick and Philotic Inc.
* 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 3 of the License, or
* (at your option) any later version.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include <sys/resource.h>
#include <sys/uio.h>
#include <stdarg.h>
#include <ctype.h>
#include <inttypes.h>
#include "stat.h"
#include "prot.h"
#include "pq.h"
#include "ms.h"
#include "job.h"
#include "tube.h"
#include "conn.h"
#include "util.h"
#include "net.h"
#include "binlog.h"
/* job body cannot be greater than this many bytes long */
size_t job_data_size_limit = JOB_DATA_SIZE_LIMIT_DEFAULT;
#define NAME_CHARS \
"ABCDEFGHIJKLMNOPQRSTUVWXYZ" \
"abcdefghijklmnopqrstuvwxyz" \
"0123456789-+/;.$_()"
#define CMD_PUT "put "
#define CMD_PEEKJOB "peek "
#define CMD_PEEK_READY "peek-ready"
#define CMD_PEEK_DELAYED "peek-delayed"
#define CMD_PEEK_BURIED "peek-buried"
#define CMD_RESERVE "reserve"
#define CMD_RESERVE_TIMEOUT "reserve-with-timeout "
#define CMD_DELETE "delete "
#define CMD_RELEASE "release "
#define CMD_BURY "bury "
#define CMD_KICK "kick "
#define CMD_TOUCH "touch "
#define CMD_STATS "stats"
#define CMD_JOBSTATS "stats-job "
#define CMD_USE "use "
#define CMD_WATCH "watch "
#define CMD_IGNORE "ignore "
#define CMD_LIST_TUBES "list-tubes"
#define CMD_LIST_TUBE_USED "list-tube-used"
#define CMD_LIST_TUBES_WATCHED "list-tubes-watched"
#define CMD_STATS_TUBE "stats-tube "
#define CMD_QUIT "quit"
#define CMD_PAUSE_TUBE "pause-tube"
#define CONSTSTRLEN(m) (sizeof(m) - 1)
#define CMD_PEEK_READY_LEN CONSTSTRLEN(CMD_PEEK_READY)
#define CMD_PEEK_DELAYED_LEN CONSTSTRLEN(CMD_PEEK_DELAYED)
#define CMD_PEEK_BURIED_LEN CONSTSTRLEN(CMD_PEEK_BURIED)
#define CMD_PEEKJOB_LEN CONSTSTRLEN(CMD_PEEKJOB)
#define CMD_RESERVE_LEN CONSTSTRLEN(CMD_RESERVE)
#define CMD_RESERVE_TIMEOUT_LEN CONSTSTRLEN(CMD_RESERVE_TIMEOUT)
#define CMD_DELETE_LEN CONSTSTRLEN(CMD_DELETE)
#define CMD_RELEASE_LEN CONSTSTRLEN(CMD_RELEASE)
#define CMD_BURY_LEN CONSTSTRLEN(CMD_BURY)
#define CMD_KICK_LEN CONSTSTRLEN(CMD_KICK)
#define CMD_TOUCH_LEN CONSTSTRLEN(CMD_TOUCH)
#define CMD_STATS_LEN CONSTSTRLEN(CMD_STATS)
#define CMD_JOBSTATS_LEN CONSTSTRLEN(CMD_JOBSTATS)
#define CMD_USE_LEN CONSTSTRLEN(CMD_USE)
#define CMD_WATCH_LEN CONSTSTRLEN(CMD_WATCH)
#define CMD_IGNORE_LEN CONSTSTRLEN(CMD_IGNORE)
#define CMD_LIST_TUBES_LEN CONSTSTRLEN(CMD_LIST_TUBES)
#define CMD_LIST_TUBE_USED_LEN CONSTSTRLEN(CMD_LIST_TUBE_USED)
#define CMD_LIST_TUBES_WATCHED_LEN CONSTSTRLEN(CMD_LIST_TUBES_WATCHED)
#define CMD_STATS_TUBE_LEN CONSTSTRLEN(CMD_STATS_TUBE)
#define CMD_PAUSE_TUBE_LEN CONSTSTRLEN(CMD_PAUSE_TUBE)
#define MSG_FOUND "FOUND"
#define MSG_NOTFOUND "NOT_FOUND\r\n"
#define MSG_RESERVED "RESERVED"
#define MSG_DEADLINE_SOON "DEADLINE_SOON\r\n"
#define MSG_TIMED_OUT "TIMED_OUT\r\n"
#define MSG_DELETED "DELETED\r\n"
#define MSG_RELEASED "RELEASED\r\n"
#define MSG_BURIED "BURIED\r\n"
#define MSG_TOUCHED "TOUCHED\r\n"
#define MSG_BURIED_FMT "BURIED %llu\r\n"
#define MSG_INSERTED_FMT "INSERTED %llu\r\n"
#define MSG_NOT_IGNORED "NOT_IGNORED\r\n"
#define MSG_NOTFOUND_LEN CONSTSTRLEN(MSG_NOTFOUND)
#define MSG_DELETED_LEN CONSTSTRLEN(MSG_DELETED)
#define MSG_TOUCHED_LEN CONSTSTRLEN(MSG_TOUCHED)
#define MSG_RELEASED_LEN CONSTSTRLEN(MSG_RELEASED)
#define MSG_BURIED_LEN CONSTSTRLEN(MSG_BURIED)
#define MSG_NOT_IGNORED_LEN CONSTSTRLEN(MSG_NOT_IGNORED)
#define MSG_OUT_OF_MEMORY "OUT_OF_MEMORY\r\n"
#define MSG_INTERNAL_ERROR "INTERNAL_ERROR\r\n"
#define MSG_DRAINING "DRAINING\r\n"
#define MSG_BAD_FORMAT "BAD_FORMAT\r\n"
#define MSG_UNKNOWN_COMMAND "UNKNOWN_COMMAND\r\n"
#define MSG_EXPECTED_CRLF "EXPECTED_CRLF\r\n"
#define MSG_JOB_TOO_BIG "JOB_TOO_BIG\r\n"
#define STATE_WANTCOMMAND 0
#define STATE_WANTDATA 1
#define STATE_SENDJOB 2
#define STATE_SENDWORD 3
#define STATE_WAIT 4
#define STATE_BITBUCKET 5
#define OP_UNKNOWN 0
#define OP_PUT 1
#define OP_PEEKJOB 2
#define OP_RESERVE 3
#define OP_DELETE 4
#define OP_RELEASE 5
#define OP_BURY 6
#define OP_KICK 7
#define OP_STATS 8
#define OP_JOBSTATS 9
#define OP_PEEK_BURIED 10
#define OP_USE 11
#define OP_WATCH 12
#define OP_IGNORE 13
#define OP_LIST_TUBES 14
#define OP_LIST_TUBE_USED 15
#define OP_LIST_TUBES_WATCHED 16
#define OP_STATS_TUBE 17
#define OP_PEEK_READY 18
#define OP_PEEK_DELAYED 19
#define OP_RESERVE_TIMEOUT 20
#define OP_TOUCH 21
#define OP_QUIT 22
#define OP_PAUSE_TUBE 23
#define TOTAL_OPS 24
#define STATS_FMT "---\n" \
"current-jobs-urgent: %u\n" \
"current-jobs-ready: %u\n" \
"current-jobs-reserved: %u\n" \
"current-jobs-delayed: %u\n" \
"current-jobs-buried: %u\n" \
"cmd-put: %" PRIu64 "\n" \
"cmd-peek: %" PRIu64 "\n" \
"cmd-peek-ready: %" PRIu64 "\n" \
"cmd-peek-delayed: %" PRIu64 "\n" \
"cmd-peek-buried: %" PRIu64 "\n" \
"cmd-reserve: %" PRIu64 "\n" \
"cmd-reserve-with-timeout: %" PRIu64 "\n" \
"cmd-delete: %" PRIu64 "\n" \
"cmd-release: %" PRIu64 "\n" \
"cmd-use: %" PRIu64 "\n" \
"cmd-watch: %" PRIu64 "\n" \
"cmd-ignore: %" PRIu64 "\n" \
"cmd-bury: %" PRIu64 "\n" \
"cmd-kick: %" PRIu64 "\n" \
"cmd-touch: %" PRIu64 "\n" \
"cmd-stats: %" PRIu64 "\n" \
"cmd-stats-job: %" PRIu64 "\n" \
"cmd-stats-tube: %" PRIu64 "\n" \
"cmd-list-tubes: %" PRIu64 "\n" \
"cmd-list-tube-used: %" PRIu64 "\n" \
"cmd-list-tubes-watched: %" PRIu64 "\n" \
"cmd-pause-tube: %" PRIu64 "\n" \
"job-timeouts: %" PRIu64 "\n" \
"total-jobs: %" PRIu64 "\n" \
"max-job-size: %zu\n" \
"current-tubes: %zu\n" \
"current-connections: %u\n" \
"current-producers: %u\n" \
"current-workers: %u\n" \
"current-waiting: %u\n" \
"total-connections: %u\n" \
"pid: %ld\n" \
"version: %s\n" \
"rusage-utime: %d.%06d\n" \
"rusage-stime: %d.%06d\n" \
"uptime: %u\n" \
"binlog-oldest-index: %s\n" \
"binlog-current-index: %s\n" \
"binlog-max-size: %zu\n" \
"\r\n"
#define STATS_TUBE_FMT "---\n" \
"name: %s\n" \
"current-jobs-urgent: %u\n" \
"current-jobs-ready: %u\n" \
"current-jobs-reserved: %u\n" \
"current-jobs-delayed: %u\n" \
"current-jobs-buried: %u\n" \
"total-jobs: %" PRIu64 "\n" \
"current-using: %u\n" \
"current-watching: %u\n" \
"current-waiting: %u\n" \
"cmd-pause-tube: %u\n" \
"pause: %" PRIu64 "\n" \
"pause-time-left: %" PRIu64 "\n" \
"\r\n"
#define STATS_JOB_FMT "---\n" \
"id: %" PRIu64 "\n" \
"tube: %s\n" \
"state: %s\n" \
"pri: %u\n" \
"age: %" PRIu64 "\n" \
"delay: %" PRIu64 "\n" \
"ttr: %" PRIu64 "\n" \
"time-left: %" PRIu64 "\n" \
"reserves: %u\n" \
"timeouts: %u\n" \
"releases: %u\n" \
"buries: %u\n" \
"kicks: %u\n" \
"\r\n"
/* this number is pretty arbitrary */
#define BUCKET_BUF_SIZE 1024
static char bucket[BUCKET_BUF_SIZE];
static unsigned int ready_ct = 0;
static struct stats global_stat = {0, 0, 0, 0, 0};
static tube default_tube;
static int drain_mode = 0;
static usec started_at;
static uint64_t op_ct[TOTAL_OPS], timeout_ct = 0;
/* Doubly-linked list of connections with at least one reserved job. */
static struct conn running = { &running, &running, 0 };
#ifdef DEBUG
static const char * op_names[] = {
"<unknown>",
CMD_PUT,
CMD_PEEKJOB,
CMD_RESERVE,
CMD_DELETE,
CMD_RELEASE,
CMD_BURY,
CMD_KICK,
CMD_STATS,
CMD_JOBSTATS,
CMD_PEEK_BURIED,
CMD_USE,
CMD_WATCH,
CMD_IGNORE,
CMD_LIST_TUBES,
CMD_LIST_TUBE_USED,
CMD_LIST_TUBES_WATCHED,
CMD_STATS_TUBE,
CMD_PEEK_READY,
CMD_PEEK_DELAYED,
CMD_RESERVE_TIMEOUT,
CMD_TOUCH,
CMD_QUIT,
CMD_PAUSE_TUBE
};
#endif
static job remove_buried_job(job j);
static int
buried_job_p(tube t)
{
return job_list_any_p(&t->buried);
}
static void
reply(conn c, const char *line, int len, int state)
{
int r;
if (!c) return;
r = conn_update_evq(c, EV_WRITE | EV_PERSIST);
if (r == -1) return twarnx("conn_update_evq() failed"), conn_close(c);
c->reply = line;
c->reply_len = len;
c->reply_sent = 0;
c->state = state;
dprintf("sending reply: %.*s", len, line);
}
#define reply_msg(c,m) reply((c),(m),CONSTSTRLEN(m),STATE_SENDWORD)
#define reply_serr(c,e) (twarnx("server error: %s",(e)),\
reply_msg((c),(e)))
static void
reply_line(conn c, int state, const char *fmt, ...)
{
int r;
va_list ap;
va_start(ap, fmt);
r = vsnprintf(c->reply_buf, LINE_BUF_SIZE, fmt, ap);
va_end(ap);
/* Make sure the buffer was big enough. If not, we have a bug. */
if (r >= LINE_BUF_SIZE) return reply_serr(c, MSG_INTERNAL_ERROR);
return reply(c, c->reply_buf, r, state);
}
static void
reply_job(conn c, job j, const char *word)
{
/* tell this connection which job to send */
c->out_job = j;
c->out_job_sent = 0;
return reply_line(c, STATE_SENDJOB, "%s %llu %u\r\n",
word, j->id, j->body_size - 2);
}
conn
remove_waiting_conn(conn c)
{
tube t;
size_t i;
if (!conn_waiting(c)) return NULL;
c->type &= ~CONN_TYPE_WAITING;
global_stat.waiting_ct--;
for (i = 0; i < c->watch.used; i++) {
t = c->watch.items[i];
t->stat.waiting_ct--;
ms_remove(&t->waiting, c);
}
return c;
}
static void
reserve_job(conn c, job j)
{
j->deadline_at = now_usec() + j->ttr;
global_stat.reserved_ct++; /* stats */
j->tube->stat.reserved_ct++;
j->reserve_ct++;
conn_insert(&running, c);
j->state = JOB_STATE_RESERVED;
job_insert(&c->reserved_jobs, j);
j->reserver = c;
if (c->soonest_job && j->deadline_at < c->soonest_job->deadline_at) {
c->soonest_job = j;
}
return reply_job(c, j, MSG_RESERVED);
}
static job
next_eligible_job(usec now)
{
tube t;
size_t i;
job j = NULL, candidate;
dprintf("tubes.used = %zu\n", tubes.used);
for (i = 0; i < tubes.used; i++) {
t = tubes.items[i];
dprintf("for %s t->waiting.used=%zu t->ready.used=%d t->pause=%" PRIu64 "\n",
t->name, t->waiting.used, t->ready.used, t->pause);
if (t->pause) {
if (t->deadline_at > now) continue;
t->pause = 0;
}
if (t->waiting.used && t->ready.used) {
candidate = pq_peek(&t->ready);
if (!j || job_pri_cmp(candidate, j) < 0) j = candidate;
}
dprintf("i = %zu, tubes.used = %zu\n", i, tubes.used);
}
return j;
}
static void
process_queue()
{
job j;
usec now = now_usec();
dprintf("processing queue\n");
while ((j = next_eligible_job(now))) {
dprintf("got eligible job %llu in %s\n", j->id, j->tube->name);
j = pq_take(&j->tube->ready);
ready_ct--;
if (j->pri < URGENT_THRESHOLD) {
global_stat.urgent_ct--;
j->tube->stat.urgent_ct--;
}
reserve_job(remove_waiting_conn(ms_take(&j->tube->waiting)), j);
}
}
static job
delay_q_peek()
{
int i;
tube t;
job j = NULL, nj;
for (i = 0; i < tubes.used; i++) {
t = tubes.items[i];
nj = pq_peek(&t->delay);
if (!nj) continue;
if (!j || nj->deadline_at < j->deadline_at) j = nj;
}
return j;
}
static tube
pause_tube_peek()
{
int i;
tube t, nt = NULL;
for (i = 0; i < tubes.used; i++) {
t = tubes.items[i];
if (t->pause) {
if (!nt || t->deadline_at < nt->deadline_at) nt = t;
}
}
return nt;
}
static void
set_main_delay_timeout()
{
job j = delay_q_peek();
tube t = pause_tube_peek();
usec deadline_at = t ? t->deadline_at : 0;
if (j && (!deadline_at || j->deadline_at < deadline_at)) deadline_at = j->deadline_at;
dprintf("deadline_at=%" PRIu64 "\n", deadline_at);
set_main_timeout(deadline_at);
}
static int
enqueue_job(job j, usec delay, char update_store)
{
int r;
j->reserver = NULL;
if (delay) {
j->deadline_at = now_usec() + delay;
r = pq_give(&j->tube->delay, j);
if (!r) return 0;
j->state = JOB_STATE_DELAYED;
set_main_delay_timeout();
} else {
r = pq_give(&j->tube->ready, j);
if (!r) return 0;
j->state = JOB_STATE_READY;
ready_ct++;
if (j->pri < URGENT_THRESHOLD) {
global_stat.urgent_ct++;
j->tube->stat.urgent_ct++;
}
}
if (update_store) {
r = binlog_write_job(j);
if (!r) return -1;
}
process_queue();
return 1;
}
static int
bury_job(job j, char update_store)
{
size_t z;
if (update_store) {
z = binlog_reserve_space_update(j);
if (!z) return 0;
j->reserved_binlog_space += z;
}
job_insert(&j->tube->buried, j);
global_stat.buried_ct++;
j->tube->stat.buried_ct++;
j->state = JOB_STATE_BURIED;
j->reserver = NULL;
j->bury_ct++;
if (update_store) return binlog_write_job(j);
return 1;
}
void
enqueue_reserved_jobs(conn c)
{
int r;
job j;
while (job_list_any_p(&c->reserved_jobs)) {
j = job_remove(c->reserved_jobs.next);
r = enqueue_job(j, 0, 0);
if (r < 1) bury_job(j, 0);
global_stat.reserved_ct--;
j->tube->stat.reserved_ct--;
c->soonest_job = NULL;
if (!job_list_any_p(&c->reserved_jobs)) conn_remove(c);
}
}
static job
delay_q_take()
{
job j = delay_q_peek();
return j ? pq_take(&j->tube->delay) : NULL;
}
static int
kick_buried_job(tube t)
{
int r;
job j;
size_t z;
if (!buried_job_p(t)) return 0;
j = remove_buried_job(t->buried.next);
z = binlog_reserve_space_update(j);
if (!z) return pq_give(&t->delay, j), 0; /* put it back */
j->reserved_binlog_space += z;
j->kick_ct++;
r = enqueue_job(j, 0, 1);
if (r == 1) return 1;
/* ready queue is full, so bury it */
bury_job(j, 0);
return 0;
}
static unsigned int
get_delayed_job_ct()
{
tube t;
size_t i;
unsigned int count = 0;
for (i = 0; i < tubes.used; i++) {
t = tubes.items[i];
count += t->delay.used;
}
return count;
}
static int
kick_delayed_job(tube t)
{
int r;
job j;
size_t z;
j = pq_take(&t->delay);
if (!j) return 0;
z = binlog_reserve_space_update(j);
if (!z) return pq_give(&t->delay, j), 0; /* put it back */
j->reserved_binlog_space += z;
j->kick_ct++;
r = enqueue_job(j, 0, 1);
if (r == 1) return 1;
/* ready queue is full, so delay it again */
r = enqueue_job(j, j->delay, 0);
if (r == 1) return 0;
/* last resort */
bury_job(j, 0);
return 0;
}
/* return the number of jobs successfully kicked */
static unsigned int
kick_buried_jobs(tube t, unsigned int n)
{
unsigned int i;
for (i = 0; (i < n) && kick_buried_job(t); ++i);
return i;
}
/* return the number of jobs successfully kicked */
static unsigned int
kick_delayed_jobs(tube t, unsigned int n)
{
unsigned int i;
for (i = 0; (i < n) && kick_delayed_job(t); ++i);
return i;
}
static unsigned int
kick_jobs(tube t, unsigned int n)
{
if (buried_job_p(t)) return kick_buried_jobs(t, n);
return kick_delayed_jobs(t, n);
}
static job
remove_buried_job(job j)
{
if (!j || j->state != JOB_STATE_BURIED) return NULL;
j = job_remove(j);
if (j) {
global_stat.buried_ct--;
j->tube->stat.buried_ct--;
}
return j;
}
static job
remove_ready_job(job j)
{
if (!j || j->state != JOB_STATE_READY) return NULL;
j = pq_remove(&j->tube->ready, j);
if (j) {
ready_ct--;
if (j->pri < URGENT_THRESHOLD) {
global_stat.urgent_ct--;
j->tube->stat.urgent_ct--;
}
}
return j;
}
static void
enqueue_waiting_conn(conn c)
{
tube t;
size_t i;
global_stat.waiting_ct++;
c->type |= CONN_TYPE_WAITING;
for (i = 0; i < c->watch.used; i++) {
t = c->watch.items[i];
t->stat.waiting_ct++;
ms_append(&t->waiting, c);
}
}
static job
find_reserved_job_in_conn(conn c, job j)
{
return (j && j->reserver == c && j->state == JOB_STATE_RESERVED) ? j : NULL;
}
static job
touch_job(conn c, job j)
{
j = find_reserved_job_in_conn(c, j);
if (j) {
j->deadline_at = now_usec() + j->ttr;
c->soonest_job = NULL;
}
return j;
}
static job
peek_job(uint64_t id)
{
return job_find(id);
}
static void
check_err(conn c, const char *s)
{
if (errno == EAGAIN) return;
if (errno == EINTR) return;
if (errno == EWOULDBLOCK) return;
twarn("%s", s);
conn_close(c);
return;
}
/* Scan the given string for the sequence "\r\n" and return the line length.
* Always returns at least 2 if a match is found. Returns 0 if no match. */
static int
scan_line_end(const char *s, int size)
{
char *match;
match = memchr(s, '\r', size - 1);
if (!match) return 0;
/* this is safe because we only scan size - 1 chars above */
if (match[1] == '\n') return match - s + 2;
return 0;
}
static int
cmd_len(conn c)
{
return scan_line_end(c->cmd, c->cmd_read);
}
/* parse the command line */
static int
which_cmd(conn c)
{
#define TEST_CMD(s,c,o) if (strncmp((s), (c), CONSTSTRLEN(c)) == 0) return (o);
TEST_CMD(c->cmd, CMD_PUT, OP_PUT);
TEST_CMD(c->cmd, CMD_PEEKJOB, OP_PEEKJOB);
TEST_CMD(c->cmd, CMD_PEEK_READY, OP_PEEK_READY);
TEST_CMD(c->cmd, CMD_PEEK_DELAYED, OP_PEEK_DELAYED);
TEST_CMD(c->cmd, CMD_PEEK_BURIED, OP_PEEK_BURIED);
TEST_CMD(c->cmd, CMD_RESERVE_TIMEOUT, OP_RESERVE_TIMEOUT);
TEST_CMD(c->cmd, CMD_RESERVE, OP_RESERVE);
TEST_CMD(c->cmd, CMD_DELETE, OP_DELETE);
TEST_CMD(c->cmd, CMD_RELEASE, OP_RELEASE);
TEST_CMD(c->cmd, CMD_BURY, OP_BURY);
TEST_CMD(c->cmd, CMD_KICK, OP_KICK);
TEST_CMD(c->cmd, CMD_TOUCH, OP_TOUCH);
TEST_CMD(c->cmd, CMD_JOBSTATS, OP_JOBSTATS);
TEST_CMD(c->cmd, CMD_STATS_TUBE, OP_STATS_TUBE);
TEST_CMD(c->cmd, CMD_STATS, OP_STATS);
TEST_CMD(c->cmd, CMD_USE, OP_USE);
TEST_CMD(c->cmd, CMD_WATCH, OP_WATCH);
TEST_CMD(c->cmd, CMD_IGNORE, OP_IGNORE);
TEST_CMD(c->cmd, CMD_LIST_TUBES_WATCHED, OP_LIST_TUBES_WATCHED);
TEST_CMD(c->cmd, CMD_LIST_TUBE_USED, OP_LIST_TUBE_USED);
TEST_CMD(c->cmd, CMD_LIST_TUBES, OP_LIST_TUBES);
TEST_CMD(c->cmd, CMD_QUIT, OP_QUIT);
TEST_CMD(c->cmd, CMD_PAUSE_TUBE, OP_PAUSE_TUBE);
return OP_UNKNOWN;
}
/* Copy up to body_size trailing bytes into the job, then the rest into the cmd
* buffer. If c->in_job exists, this assumes that c->in_job->body is empty.
* This function is idempotent(). */
static void
fill_extra_data(conn c)
{
int extra_bytes, job_data_bytes = 0, cmd_bytes;
if (!c->fd) return; /* the connection was closed */
if (!c->cmd_len) return; /* we don't have a complete command */
/* how many extra bytes did we read? */
extra_bytes = c->cmd_read - c->cmd_len;
/* how many bytes should we put into the job body? */
if (c->in_job) {
job_data_bytes = min(extra_bytes, c->in_job->body_size);
memcpy(c->in_job->body, c->cmd + c->cmd_len, job_data_bytes);
c->in_job_read = job_data_bytes;
} else if (c->in_job_read) {
/* we are in bit-bucket mode, throwing away data */
job_data_bytes = min(extra_bytes, c->in_job_read);
c->in_job_read -= job_data_bytes;
}
/* how many bytes are left to go into the future cmd? */
cmd_bytes = extra_bytes - job_data_bytes;
memmove(c->cmd, c->cmd + c->cmd_len + job_data_bytes, cmd_bytes);
c->cmd_read = cmd_bytes;
c->cmd_len = 0; /* we no longer know the length of the new command */
}
static void
_skip(conn c, int n, const char *line, int len)
{
/* Invert the meaning of in_job_read while throwing away data -- it
* counts the bytes that remain to be thrown away. */
c->in_job = 0;
c->in_job_read = n;
fill_extra_data(c);
if (c->in_job_read == 0) return reply(c, line, len, STATE_SENDWORD);
c->reply = line;
c->reply_len = len;
c->reply_sent = 0;
c->state = STATE_BITBUCKET;
return;
}
#define skip(c,n,m) (_skip(c,n,m,CONSTSTRLEN(m)))
static void
enqueue_incoming_job(conn c)
{
int r;
job j = c->in_job;
c->in_job = NULL; /* the connection no longer owns this job */
c->in_job_read = 0;
/* check if the trailer is present and correct */
if (memcmp(j->body + j->body_size - 2, "\r\n", 2)) {
job_free(j);
return reply_msg(c, MSG_EXPECTED_CRLF);
}
if (drain_mode) {
job_free(j);
return reply_serr(c, MSG_DRAINING);
}
if (j->reserved_binlog_space) return reply_serr(c, MSG_INTERNAL_ERROR);
j->reserved_binlog_space = binlog_reserve_space_put(j);
if (!j->reserved_binlog_space) return reply_serr(c, MSG_OUT_OF_MEMORY);
/* we have a complete job, so let's stick it in the pqueue */
r = enqueue_job(j, j->delay, 1);
if (r < 0) return reply_serr(c, MSG_INTERNAL_ERROR);
op_ct[OP_PUT]++; /* stats */
global_stat.total_jobs_ct++;
j->tube->stat.total_jobs_ct++;
if (r == 1) return reply_line(c, STATE_SENDWORD, MSG_INSERTED_FMT, j->id);
/* out of memory trying to grow the queue, so it gets buried */
bury_job(j, 0);
reply_line(c, STATE_SENDWORD, MSG_BURIED_FMT, j->id);
}
static unsigned int
uptime()
{
return (now_usec() - started_at) / 1000000;
}
static int
fmt_stats(char *buf, size_t size, void *x)
{
struct rusage ru = {{0, 0}, {0, 0}};
getrusage(RUSAGE_SELF, &ru); /* don't care if it fails */
return snprintf(buf, size, STATS_FMT,
global_stat.urgent_ct,
ready_ct,
global_stat.reserved_ct,
get_delayed_job_ct(),
global_stat.buried_ct,
op_ct[OP_PUT],
op_ct[OP_PEEKJOB],
op_ct[OP_PEEK_READY],
op_ct[OP_PEEK_DELAYED],
op_ct[OP_PEEK_BURIED],
op_ct[OP_RESERVE],
op_ct[OP_RESERVE_TIMEOUT],
op_ct[OP_DELETE],
op_ct[OP_RELEASE],
op_ct[OP_USE],
op_ct[OP_WATCH],
op_ct[OP_IGNORE],
op_ct[OP_BURY],
op_ct[OP_KICK],
op_ct[OP_TOUCH],
op_ct[OP_STATS],
op_ct[OP_JOBSTATS],
op_ct[OP_STATS_TUBE],
op_ct[OP_LIST_TUBES],
op_ct[OP_LIST_TUBE_USED],
op_ct[OP_LIST_TUBES_WATCHED],
op_ct[OP_PAUSE_TUBE],
timeout_ct,
global_stat.total_jobs_ct,
job_data_size_limit,
tubes.used,
count_cur_conns(),
count_cur_producers(),
count_cur_workers(),
global_stat.waiting_ct,
count_tot_conns(),
(long) getpid(),
VERSION,
(int) ru.ru_utime.tv_sec, (int) ru.ru_utime.tv_usec,
(int) ru.ru_stime.tv_sec, (int) ru.ru_stime.tv_usec,
uptime(),
binlog_oldest_index(),
binlog_current_index(),
binlog_size_limit);
}
/* Read a priority value from the given buffer and place it in pri.
* Update end to point to the address after the last character consumed.
* Pri and end can be NULL. If they are both NULL, read_pri() will do the
* conversion and return the status code but not update any values. This is an
* easy way to check for errors.
* If end is NULL, read_pri will also check that the entire input string was
* consumed and return an error code otherwise.
* Return 0 on success, or nonzero on failure.
* If a failure occurs, pri and end are not modified. */
static int
read_pri(unsigned int *pri, const char *buf, char **end)
{
char *tend;
unsigned int tpri;
errno = 0;
while (buf[0] == ' ') buf++;
if (!isdigit(buf[0])) return -1;
tpri = strtoul(buf, &tend, 10);
if (tend == buf) return -1;
if (errno && errno != ERANGE) return -1;
if (!end && tend[0] != '\0') return -1;
if (pri) *pri = tpri;
if (end) *end = tend;
return 0;
}
/* Read a delay value from the given buffer and place it in delay.
* The interface and behavior are analogous to read_pri(). */
static int
read_delay(usec *delay, const char *buf, char **end)
{
int r;
unsigned int delay_sec;
r = read_pri(&delay_sec, buf, end);
if (r) return r;
*delay = ((usec) delay_sec) * 1000000;
return 0;
}
/* Read a timeout value from the given buffer and place it in ttr.
* The interface and behavior are the same as in read_delay(). */
static int
read_ttr(usec *ttr, const char *buf, char **end)
{
return read_delay(ttr, buf, end);
}
/* Read a tube name from the given buffer moving the buffer to the name start */
static int
read_tube_name(char **tubename, char *buf, char **end)
{
size_t len;
while (buf[0] == ' ') buf++;
len = strspn(buf, NAME_CHARS);
if (len == 0) return -1;
if (tubename) *tubename = buf;
if (end) *end = buf + len;
return 0;
}
static void
wait_for_job(conn c, int timeout)
{
int r;
c->state = STATE_WAIT;
enqueue_waiting_conn(c);
/* Set the pending timeout to the requested timeout amount */
c->pending_timeout = timeout;
/* this conn is waiting, but we want to know if they hang up */
r = conn_update_evq(c, EV_READ | EV_PERSIST);
if (r == -1) return twarnx("update events failed"), conn_close(c);
}
typedef int(*fmt_fn)(char *, size_t, void *);
static void
do_stats(conn c, fmt_fn fmt, void *data)