/*
* TODO
- * - check all structs initialised
- * - check all fd watches properly undone
- * - check all init functions called
+ * - xperhaps_close
* - actually implement badusage
* - options for all options
* - manpage
#define LIST_REMHEAD(l) LIST_REMSOMEHOW((l),list_remhead)
#define LIST_REMTAIL(l) LIST_REMSOMEHOW((l),list_remtail)
+#define LIST_INIT(l) ((l).hd, list_new((struct list*)&(l)))
#define LIST_HEAD(l) ((typeof((l).hd))(list_head((struct list*)&(l))))
#define LIST_NEXT(n) ((typeof(n))list_succ(NODE((n))))
#define LIST_BACK(n) ((typeof(n))list_pred(NODE((n))))
static void xmit_free(XmitDetails *d);
+#define SMS(newstate, periods, why) \
+ (statemc_setstate(sm_##newstate,(periods),#newstate,(why)))
static void statemc_setstate(StateMachineState newsms, int periods,
const char *forlog, const char *why);
+
static void statemc_start_flush(const char *why); /* Normal => Flushing */
static void spawn_inndcomm_flush(const char *why); /* Moved => Flushing */
-static void check_master_queue(void);
+static void check_assign_articles(void);
static void queue_check_input_done(void);
static void statemc_check_flushing_done(void);
static void inputfile_tailing_start(InputFile *ipf);
static void inputfile_tailing_stop(InputFile *ipf);
-static int filemon_init(void);
static void filemon_start(InputFile *ipf);
static void filemon_stop(InputFile *ipf);
static void filemon_callback(InputFile *ipf);
oop_readable_call *readable_callback;
void *readable_callback_user;
- int fd;
+ int fd; /* may be 0, meaning closed */
Filemon_Perfile *filemon;
oop_read *rd;
struct Conn {
ISNODE(Conn);
- int fd, max_queue, stream, quitting;
+ int fd; /* may be 0, meaning closed (during construction/destruction) */
+ int max_queue, stream, quitting;
int since_activity; /* periods */
ArticleList waiting; /* not yet told peer */
ArticleList priority; /* peer says send it now */
};
-/*----- operational variables -----*/
+/*----- general operational variables -----*/
+/* main initialises */
static oop_source *loop;
-
-static int until_connect;
static ConnList conns;
static ArticleList queue;
-
static char *path_lock, *path_flushing, *path_defer, *globpat_backlog;
-#define SMS(newstate, periods, why) \
- (statemc_setstate(sm_##newstate,(periods),#newstate,(why)))
-
+/* statemc_init initialises */
static StateMachineState sms;
static FILE *defer;
static InputFile *main_input_file, *flushing_input_file, *backlog_input_file;
-static int sm_period_counter, until_backlog_nextscan;
+static int sm_period_counter;
+/* initialisation to 0 is good */
+static int until_connect, until_backlog_nextscan;
static double accept_proportion;
static int nocheck, nocheck_reported;
return errnoval==EWOULDBLOCK || errnoval==EAGAIN;
}
-/*========== making new connections ==========*/
+/*========== management of connections ==========*/
static void conn_dispose(Conn *conn) {
if (!conn) return;
+ if (conn->fd) {
+ loop->cancel_fd(loop, conn->fd, OOP_WRITE);
+ loop->cancel_fd(loop, conn->fd, OOP_EXCEPTION);
+ }
perhaps_close(&conn->fd);
free(conn);
until_connect= reconnect_delay_periods;
}
+static void *conn_exception(oop_source *lp, int fd,
+ oop_event ev, void *conn_v) {
+ Conn *conn= conn_v;
+ unsigned char ch;
+ assert(fd == conn->fd);
+ assert(ev == OOP_EXCEPTION);
+ int r= read(conn->fd, &ch, 1);
+ if (r<0) connfail(conn,"read failed: %s",strerror(errno));
+ else connfail(conn,"exceptional condition on socket (peer sent urgent"
+ " data? read(,&ch,1)=%d,ch='\\x%02x')",r,ch);
+ return OOP_CONTINUE;
+}
+
+static void vconnfail(Conn *conn, const char *fmt, va_list al) {
+ int requeue[art_MaxState];
+
+ Article *art;
+ while ((art= LIST_REMHEAD(conn->priority))) LIST_ADDTAIL(queue, art);
+ while ((art= LIST_REMHEAD(conn->waiting))) LIST_ADDTAIL(queue, art);
+ while ((art= LIST_REMHEAD(conn->sent))) {
+ requeue[art->state]++;
+ if (art->state==art_Unsolicited) art->state= art_Unchecked;
+ LIST_ADDTAIL(queue,art);
+ }
+
+ int i;
+ XmitDetails *d;
+ for (i=0, d=conn->xmitd; i<conn->xmitu; i++, d++)
+ xmit_free(d);
+
+ char *m= xvasprintf(fmt,al);
+ warn("C%d connection failed (requeueing " RCI_TRIPLE_FMT_BASE "): %s",
+ conn->fd, RCI_TRIPLE_VALS_BASE(requeue, /*nothing*/), m);
+ free(m);
+
+ LIST_REMOVE(conns,conn);
+ conn_dispose(conn);
+ check_assign_articles();
+}
+
+static void connfail(Conn *conn, const char *fmt, ...) {
+ va_list al;
+ va_start(al,fmt);
+ vconnfail(conn,fmt,al);
+ va_end(al);
+}
+
+static void check_idle_conns(void) {
+ Conn *conn;
+ for (conn=LIST_HEAD(conns); conn; conn=LIST_NEXT(conn))
+ conn->since_activity++;
+ search_again:
+ for (conn=LIST_HEAD(conns); conn; conn=LIST_NEXT(conn)) {
+ if (conn->since_activity <= need_activity_periods) continue;
+
+ /* We need to shut this down */
+ if (conn->quitting)
+ connfail(conn,"timed out waiting for response to QUIT");
+ else if (conn->sent.count)
+ connfail(conn,"timed out waiting for responses");
+ else if (conn->waiting.count || conn->priority.count)
+ connfail(conn,"BUG IN INNDUCT conn has queue but nothing sent");
+ else if (conn->xmitu)
+ connfail(conn,"peer has been sending responses"
+ " before receiving our commands!");
+ else {
+ static const char quitcmd[]= "QUIT\r\n";
+ int todo= sizeof(quitcmd)-1;
+ const char *p= quitcmd;
+ for (;;) {
+ int r= write(conn->fd, p, todo);
+ if (r<0) {
+ if (isewouldblock(errno))
+ connfail(conn, "blocked writing QUIT to idle connection");
+ else
+ connfail(conn, "failed to write QUIT to idle connection: %s",
+ strerror(errno));
+ break;
+ }
+ assert(r<=todo);
+ todo -= r;
+ if (!todo) {
+ conn->quitting= 1;
+ conn->since_activity= 0;
+ debug("C%d is idle, quitting", conn->fd);
+ break;
+ }
+ }
+ }
+ goto search_again;
+ }
+}
+
+/*---------- making new connections ----------*/
+
static int connecting_sockets[2]= {-1,-1};
static pid_t connecting_child;
if (got != -1) {
assert(got==connecting_child);
connecting_child= 0;
- if (WIFEXITED(status) &&
- (WEXITSTATUS(status) != 0 &&
- WEXITSTATUS(status) != CONNCHILD_ESTATUS_STREAM &&
- WEXITSTATUS(status) != CONNCHILD_ESTATUS_NOSTREAM)) {
- /* child already reported the problem */
+ if (WIFEXITED(status)) {
+ if (WEXITSTATUS(status) != 0 &&
+ WEXITSTATUS(status) != CONNCHILD_ESTATUS_STREAM &&
+ WEXITSTATUS(status) != CONNCHILD_ESTATUS_NOSTREAM)
+ /* child already reported the problem */;
+ else
+ warn("connect: connection child exited code %d but no cmsg",
+ WEXITSTATUS(status));
} else if (WIFSIGNALED(status) && WTERMSIG(status) == SIGALRM) {
warn("connect: connection attempt timed out");
- } else if (!WIFEXITED(status)) {
+ } else {
report_child_status("connect", status);
- /* that's probably the root cause then */
}
} else {
/* child is still running apparently, report the socket problem */
syswarn("connect: read from child socket failed");
else if (e == OOP_EXCEPTION)
warn("connect: unexpected exception on child socket");
- else
+ else if (!rs)
warn("connect: unexpected EOF on child socket");
+ else
+ fatal("connect: unexpected lack of cmsg from child");
}
goto x;
}
CHK(len, CMSG_LEN(sizeof(conn->fd)));
#undef CHK
- if (CMSG_NXTHDR(&msg,h)) { die("connect: child sent many cmsgs"); goto x; }
+ if (CMSG_NXTHDR(&msg,h)) die("connect: child sent many cmsgs");
memcpy(&conn->fd, CMSG_DATA(h), sizeof(conn->fd));
+ loop->on_fd(loop, conn->fd, OOP_EXCEPTION, conn_exception, conn);
int status;
pid_t got= waitpid(connecting_child, &status, 0);
}
/* Phew! */
+ LIST_INIT(conn->waiting);
+ LIST_INIT(conn->priority);
+ LIST_INIT(conn->sent);
setnonblock(conn->fd, 1);
conn->max_queue= conn->stream ? max_queue_per_conn : 1;
- LIST_ADDHEAD(conns, conn);
notice("C%d connected %s", conn->fd, conn->stream ? "streaming" : "plain");
+ LIST_ADDHEAD(conns, conn);
+
connect_attempt_discard();
- check_master_queue();
+ check_assign_articles();
return 0;
x:
connect_attempt_discard();
}
-static void check_idle_conns(void) {
- Conn *conn;
- for (conn=LIST_HEAD(conns); conn; conn=LIST_NEXT(conn))
- conn->since_activity++;
- search_again:
- for (conn=LIST_HEAD(conns); conn; conn=LIST_NEXT(conn)) {
- if (conn->since_activity <= need_activity_periods) continue;
-
- /* We need to shut this down */
- if (conn->quitting)
- connfail(conn,"timed out waiting for response to QUIT");
- else if (conn->sent.count)
- connfail(conn,"timed out waiting for responses");
- else if (conn->waiting.count || conn->priority.count)
- connfail(conn,"BUG IN INNDUCT conn has queue but nothing sent");
- else if (conn->xmitu)
- connfail(conn,"peer has been sending responses"
- " before receiving our commands!");
- else {
- static const char quitcmd[]= "QUIT\r\n";
- int todo= sizeof(quitcmd)-1;
- const char *p= quitcmd;
- for (;;) {
- int r= write(conn->fd, p, todo);
- if (r<0) {
- if (isewouldblock(errno))
- connfail(conn, "blocked writing QUIT to idle connection");
- else
- connfail(conn, "failed to write QUIT to idle connection: %s",
- strerror(errno));
- break;
- }
- assert(r<=todo);
- todo -= r;
- if (!todo) {
- conn->quitting= 1;
- conn->since_activity= 0;
- debug("C%d is idle, quitting", conn->fd);
- break;
- }
- }
- }
- goto search_again;
- }
-}
-
-/*========== overall control of article flow ==========*/
+/*---------- assigning articles to conns, and transmitting ----------*/
-static void check_master_queue(void) {
+static void check_assign_articles(void) {
for (;;) {
if (!queue.count)
break;
}
}
-static void vconnfail(Conn *conn, const char *fmt, va_list al) {
- int requeue[art_MaxState];
-
- Article *art;
- while ((art= LIST_REMHEAD(conn->priority))) LIST_ADDTAIL(queue, art);
- while ((art= LIST_REMHEAD(conn->waiting))) LIST_ADDTAIL(queue, art);
- while ((art= LIST_REMHEAD(conn->sent))) {
- requeue[art->state]++;
- if (art->state==art_Unsolicited) art->state= art_Unchecked;
- LIST_ADDTAIL(queue,art);
- }
-
- int i;
- XmitDetails *d;
- for (i=0, d=conn->xmitd; i<conn->xmitu; i++, d++)
- xmit_free(d);
-
- char *m= xvasprintf(fmt,al);
- warn("C%d connection failed (requeueing " RCI_TRIPLE_FMT_BASE "): %s",
- conn->fd, RCI_TRIPLE_VALS_BASE(requeue, /*nothing*/), m);
- free(m);
-
- LIST_REMOVE(conns,conn);
- conn_dispose(conn);
- check_master_queue();
-}
-
-static void connfail(Conn *conn, const char *fmt, ...) {
- va_list al;
- va_start(al,fmt);
- vconnfail(conn,fmt,al);
- va_end(al);
-}
-
/*========== article transmission ==========*/
static XmitDetails *xmit_core(Conn *conn, const char *data, int len,
else if (whichcount == RC_unwanted) update_nocheck(0);
InputFile *ipf= art->ipf;
+ assert(ipf->fd);
+
while (art->blanklen) {
static const char spaces[]=
" "
ipf->inprogress--;
assert(ipf->inprogress >= 0);
+ free(art);
if (!ipf->inprogress && ipf != main_input_file)
queue_check_input_done();
-
- free(art);
}
static void *peer_rd_ok(oop_source *lp, oop_read *oread, oop_event ev,
}
conn_maybe_write(conn);
- check_master_queue();
+ check_assign_articles();
return OOP_CONTINUE;
}
assert(ipf != main_input_file); /* promised by tailing_try_read */
inputfile_tailing_stop(ipf);
- assert(ipf->fd >= 0);
+ assert(ipf->fd > 0);
+fixme do not close fd do something else because art_done needs it to blank entries;
if (close(ipf->fd)) sysdie("could not close input file %s", ipf->path);
- ipf->fd= -1;
+ ipf->fd= 0;
if (ipf == flushing_input_file) {
assert(sms==sm_SEPARATED || sms==sm_DROPPING);
if (errno==ENOENT) return 0;
sysfatal("unable to open input file %s", path);
}
+ assert(fd>0);
InputFile *ipf= xmalloc(sizeof(*ipf) + strlen(path) + 1);
memset(ipf,0,sizeof(*ipf));
return ipf;
}
-static void close_input_file(InputFile *ipf) {
+static void close_input_file(InputFile *ipf) { /* does not free */
assert(!ipf->readable_callback); /* must have had ->on_cancel */
assert(!ipf->filemon); /* must have had inputfile_tailing_stop */
assert(!ipf->rd); /* must have had inputfile_tailing_stop */
assert(!ipf->inprogress); /* no dangling pointers pointing here */
- if (ipf->fd >= 0)
+ if (ipf->fd) {
if (close(ipf->fd)) sysdie("could not close input file %s", ipf->path);
+ ipf->fd= 0;
+ }
}
ipf->readcount_ok++;
art= xmalloc(sizeof(*art) - 1 + midlen + 1);
- art->offset= ipf->offset;
- art->blanklen= recsz;
- art->midlen= midlen;
art->state= art_Unchecked;
+ art->midlen= midlen;
art->ipf= ipf; ipf->inprogress++;
art->token= TextToToken(tokentextbuf);
+ art->offset= ipf->offset;
+ art->blanklen= recsz;
strcpy(art->messageid, space+1);
LIST_ADDTAIL(queue, art);
ipf->offset >= target_max_feedfile_size)
statemc_start_flush("feed file size");
- check_master_queue();
+ check_assign_articles();
return OOP_CONTINUE;
}
errno=EAGAIN;
return -1;
} else if (ipf==flushing_input_file) {
- assert(ipf->fd>=0);
+ assert(ipf->fd);
assert(sms==sm_SEPARATED || sms==sm_DROPPING);
} else if (ipf==backlog_input_file) {
- assert(ipf->fd>=0);
+ assert(ipf->fd);
} else {
abort();
}
};
static void inputfile_tailing_start(InputFile *ipf) {
- assert(!ipf->fd);
+ assert(!ipf->rd);
ipf->readable.on_readable= tailing_on_readable;
ipf->readable.on_cancel= tailing_on_cancel;
ipf->readable.try_read= tailing_try_read;
}
static void inputfile_tailing_stop(InputFile *ipf) {
- assert(ipf->fd);
+ assert(ipf->rd);
oop_rd_cancel(ipf->rd);
oop_rd_delete(ipf->rd);
ipf->rd= 0;
| V | | V
| ============= V V ============
| SEPARATED-1 | | DROPPING-1
- | flsh->fd>=0 | | flsh->fd>=0
+ | flsh->fd>0 | | flsh->fd>0
| [Separated] | | [Dropping]
| main F idle | | main none
| old D tail | | old D tail
| V | | V
| =============== | | ===============
| SEPARATED-2 | | DROPPING-2
- | flsh->fd==-1 | V flsh->fd==-1
+ | flsh->fd==0 | V flsh->fd==0
| [Finishing] | | [Dropping]
| main F tail | `. main none
| old D closed | `. old D closed
static int inputfile_is_done(InputFile *ipf) {
if (!ipf) return 0;
if (ipf->inprogress) return 0; /* new article in the meantime */
- if (ipf->fd >= 0); return 0; /* not had EOF */
+ if (ipf->fd) return 0; /* not had EOF */
return 1;
}
if (!main_input_file) xtra= "-ABSENT";
break;
case sm_SEPARATED: case sm_DROPPING:
- xtra= flushing_input_file->fd >= 0 ? "-1" : "-2";
+ xtra= flushing_input_file->fd ? "-1" : "-2";
break;
default:;
}
static void postfork_inputfile(InputFile *ipf) {
if (!ipf) return;
- assert(ipf->fd >= 0);
- close(ipf->fd);
- ipf->fd= -1;
+ assert(ipf->fd);
+ perhaps_close(&ipf->fd);
}
static void postfork_stdio(FILE *f) {
poll_backlog_file();
if (!backlog_input_file) close_defer(); /* want to start on a new backlog */
statemc_period_poll();
- check_master_queue();
+ check_assign_articles();
check_idle_conns();
});
notice("starting");
+ LIST_INIT(conns);
+ LIST_INIT(queue);
+
if (!filemon_method_init()) {
warn("no file monitoring available, polling");
filepoll_schedule();
~ian / inn-innduct.git / blobdiff