/*
- * $Id: afp_dsi.c,v 1.14 2001-12-23 01:19:55 jmarcus Exp $
- *
* Copyright (c) 1999 Adrian Sun (asun@zoology.washington.edu)
* Copyright (c) 1990,1993 Regents of The University of Michigan.
* All Rights Reserved. See COPYRIGHT.
#endif /* HAVE_SYS_STAT_H */
#include <netinet/in.h>
#include <arpa/inet.h>
-#include <syslog.h>
+#include <atalk/logger.h>
#include <atalk/dsi.h>
#include <atalk/compat.h>
#include "switch.h"
#include "auth.h"
#include "fork.h"
+#include "dircache.h"
-extern struct oforks *writtenfork;
+#ifdef FORCE_UIDGID
+#warning UIDGID
+#include "uid.h"
+#endif /* FORCE_UIDGID */
#define CHILD_DIE (1 << 0)
#define CHILD_RUNNING (1 << 1)
+#define CHILD_SLEEPING (1 << 2)
+#define CHILD_DATA (1 << 3)
+
+/*
+ * We generally pass this from afp_over_dsi to all afp_* funcs, so it should already be
+ * available everywhere. Unfortunately some funcs (eg acltoownermode) need acces to it
+ * but are deeply nested in the function chain with the caller already without acces to it.
+ * Changing this would require adding a reference to the caller which itself might be
+ * called in many places (eg acltoownermode is called from accessmode).
+ * The only sane way out is providing a copy of it here:
+ */
+AFPObj *AFPobj = NULL;
static struct {
AFPObj *obj;
} child;
-static __inline__ void afp_dsi_close(AFPObj *obj)
+static void afp_dsi_close(AFPObj *obj)
{
DSI *dsi = obj->handle;
+ /* we may have been called from a signal handler caught when afpd was running
+ * as uid 0, that's the wrong user for volume's prexec_close scripts if any,
+ * restore our login user
+ */
+ if (geteuid() != obj->uid) {
+ if (seteuid( obj->uid ) < 0) {
+ LOG(log_error, logtype_afpd, "can't seteuid(%u) back %s: uid: %u, euid: %u",
+ obj->uid, strerror(errno), getuid(), geteuid());
+ exit(EXITERR_SYS);
+ }
+ }
+
+ close_all_vol();
if (obj->logout)
(*obj->logout)();
- dsi_close(dsi);
+ LOG(log_info, logtype_afpd, "AFP statistics: %.2f KB read, %.2f KB written",
+ dsi->read_count/1024.0, dsi->write_count/1024.0);
+ log_dircache_stat();
- /* UAM had syslog control; afpd needs to reassert itself */
- openlog( "afpd", LOG_NDELAY|LOG_PID, LOG_DAEMON);
- syslog(LOG_INFO, "%.2fKB read, %.2fKB written",
- dsi->read_count/1024.0, dsi->write_count/1024.0);
+ dsi_close(dsi);
}
-/* a little bit of code duplication. */
+/* -------------------------------
+ * SIGTERM
+ * a little bit of code duplication.
+ */
static void afp_dsi_die(int sig)
{
+static volatile int in_handler;
+
+ if (in_handler) {
+ return;
+ }
+ /* it's not atomic but we don't care because it's an exit function
+ * ie if a signal is received here, between the test and the affectation,
+ * it will not return.
+ */
+ in_handler = 1;
+
dsi_attention(child.obj->handle, AFPATTN_SHUTDOWN);
afp_dsi_close(child.obj);
if (sig) /* if no signal, assume dieing because logins are disabled &
- don't log it (maintenance mode)*/
- syslog (LOG_INFO, "Connection terminated");
+ don't log it (maintenance mode)*/
+ LOG(log_info, logtype_afpd, "Connection terminated");
if (sig == SIGTERM || sig == SIGALRM) {
exit( 0 );
}
}
}
-static void afp_dsi_timedown()
+/* */
+static void afp_dsi_sleep(void)
+{
+ child.flags |= CHILD_SLEEPING;
+ dsi_sleep(child.obj->handle, 1);
+}
+
+/* ------------------- */
+static void afp_dsi_timedown(int sig _U_)
{
struct sigaction sv;
struct itimerval it;
child.flags |= CHILD_DIE;
/* shutdown and don't reconnect. server going down in 5 minutes. */
setmessage("The server is going down for maintenance.");
- dsi_attention(child.obj->handle, AFPATTN_SHUTDOWN | AFPATTN_NORECONNECT |
- AFPATTN_MESG | AFPATTN_TIME(5));
+ if (dsi_attention(child.obj->handle, AFPATTN_SHUTDOWN | AFPATTN_NORECONNECT |
+ AFPATTN_MESG | AFPATTN_TIME(5)) < 0) {
+ DSI *dsi = (DSI *) child.obj->handle;
+ dsi->down_request = 1;
+ }
it.it_interval.tv_sec = 0;
it.it_interval.tv_usec = 0;
it.it_value.tv_sec = 300;
it.it_value.tv_usec = 0;
- if ( setitimer( ITIMER_REAL, &it, 0 ) < 0 ) {
- syslog( LOG_ERR, "afp_timedown: setitimer: %s", strerror(errno) );
- afp_dsi_die(1);
- }
+ if ( setitimer( ITIMER_REAL, &it, NULL ) < 0 ) {
+ LOG(log_error, logtype_afpd, "afp_timedown: setitimer: %s", strerror(errno) );
+ afp_dsi_die(EXITERR_SYS);
+ }
memset(&sv, 0, sizeof(sv));
sv.sa_handler = afp_dsi_die;
sigemptyset( &sv.sa_mask );
sigaddset(&sv.sa_mask, SIGHUP);
sigaddset(&sv.sa_mask, SIGTERM);
sv.sa_flags = SA_RESTART;
- if ( sigaction( SIGALRM, &sv, 0 ) < 0 ) {
- syslog( LOG_ERR, "afp_timedown: sigaction: %s", strerror(errno) );
- afp_dsi_die(1);
+ if ( sigaction( SIGALRM, &sv, NULL ) < 0 ) {
+ LOG(log_error, logtype_afpd, "afp_timedown: sigaction: %s", strerror(errno) );
+ afp_dsi_die(EXITERR_SYS);
+ }
+
+ /* ignore myself */
+ sv.sa_handler = SIG_IGN;
+ sigemptyset( &sv.sa_mask );
+ sv.sa_flags = SA_RESTART;
+ if ( sigaction( SIGUSR1, &sv, NULL ) < 0 ) {
+ LOG(log_error, logtype_afpd, "afp_timedown: sigaction SIGHUP: %s", strerror(errno) );
+ afp_dsi_die(EXITERR_SYS);
}
}
+/* ---------------------------------
+ * SIGHUP reload configuration file
+ */
+volatile int reload_request = 0;
+
+static void afp_dsi_reload(int sig _U_)
+{
+ reload_request = 1;
+}
+
+/* ---------------------------------
+ * SIGINT: enable max_debug LOGging
+ */
+static volatile sig_atomic_t debug_request = 0;
+
+static void afp_dsi_debug(int sig _U_)
+{
+ debug_request = 1;
+}
+
+/* ---------------------- */
#ifdef SERVERTEXT
-static void afp_dsi_getmesg (int sig)
+static void afp_dsi_getmesg (int sig _U_)
{
- readmessage();
- dsi_attention(child.obj->handle, AFPATTN_MESG | AFPATTN_TIME(5));
+ DSI *dsi = (DSI *) child.obj->handle;
+
+ dsi->msg_request = 1;
+ if (dsi_attention(child.obj->handle, AFPATTN_MESG | AFPATTN_TIME(5)) < 0)
+ dsi->msg_request = 2;
}
#endif /* SERVERTEXT */
-static void alarm_handler()
+static void alarm_handler(int sig _U_)
{
+ int err;
+ DSI *dsi = (DSI *) child.obj->handle;
+
+ /* we have to restart the timer because some libraries
+ * may use alarm() */
+ setitimer(ITIMER_REAL, &dsi->timer, NULL);
+
+ /* we got some traffic from the client since the previous timer
+ * tick. */
+ if ((child.flags & CHILD_DATA)) {
+ child.flags &= ~CHILD_DATA;
+ return;
+ }
+
/* if we're in the midst of processing something,
don't die. */
+ if ((child.flags & CHILD_SLEEPING) && child.tickle++ < child.obj->options.sleep) {
+ return;
+ }
+
if ((child.flags & CHILD_RUNNING) || (child.tickle++ < child.obj->options.timeout)) {
- dsi_tickle(child.obj->handle);
+ if (!(err = pollvoltime(child.obj)))
+ err = dsi_tickle(child.obj->handle);
+ if (err <= 0)
+ afp_dsi_die(EXITERR_CLNT);
+
} else { /* didn't receive a tickle. close connection */
- syslog(LOG_ERR, "afp_alarm: child timed out");
- afp_dsi_die(1);
+ LOG(log_error, logtype_afpd, "afp_alarm: child timed out");
+ afp_dsi_die(EXITERR_CLNT);
+ }
+}
+
+/* -----------------
+ if dsi->in_write is set attention, tickle (and close?) msg
+ aren't sent. We don't care about tickle
+*/
+static void pending_request(DSI *dsi)
+{
+ /* send pending attention */
+
+ /* read msg if any, it could be done in afp_getsrvrmesg */
+ if (dsi->msg_request) {
+ if (dsi->msg_request == 2) {
+ /* didn't send it in signal handler */
+ dsi_attention(child.obj->handle, AFPATTN_MESG | AFPATTN_TIME(5));
+ }
+ dsi->msg_request = 0;
+ readmessage(child.obj);
+ }
+ if (dsi->down_request) {
+ dsi->down_request = 0;
+ dsi_attention(child.obj->handle, AFPATTN_SHUTDOWN | AFPATTN_NORECONNECT |
+ AFPATTN_MESG | AFPATTN_TIME(5));
}
}
-/* afp over dsi. this never returns. */
+/* -------------------------------------------
+ afp over dsi. this never returns.
+*/
void afp_over_dsi(AFPObj *obj)
{
DSI *dsi = (DSI *) obj->handle;
u_int8_t function;
struct sigaction action;
+ AFPobj = obj;
obj->exit = afp_dsi_die;
obj->reply = (int (*)()) dsi_cmdreply;
obj->attention = (int (*)(void *, AFPUserBytes)) dsi_attention;
+ obj->sleep = afp_dsi_sleep;
child.obj = obj;
child.tickle = child.flags = 0;
- /* install SIGTERM and SIGHUP */
memset(&action, 0, sizeof(action));
- action.sa_handler = afp_dsi_timedown;
+
+ /* install SIGHUP */
+ action.sa_handler = afp_dsi_reload;
sigemptyset( &action.sa_mask );
sigaddset(&action.sa_mask, SIGALRM);
sigaddset(&action.sa_mask, SIGTERM);
+ sigaddset(&action.sa_mask, SIGUSR1);
+ sigaddset(&action.sa_mask, SIGINT);
+#ifdef SERVERTEXT
+ sigaddset(&action.sa_mask, SIGUSR2);
+#endif
action.sa_flags = SA_RESTART;
- if ( sigaction( SIGHUP, &action, 0 ) < 0 ) {
- syslog( LOG_ERR, "afp_over_dsi: sigaction: %s", strerror(errno) );
- afp_dsi_die(1);
+ if ( sigaction( SIGHUP, &action, NULL ) < 0 ) {
+ LOG(log_error, logtype_afpd, "afp_over_dsi: sigaction: %s", strerror(errno) );
+ afp_dsi_die(EXITERR_SYS);
}
+ /* install SIGTERM */
action.sa_handler = afp_dsi_die;
sigemptyset( &action.sa_mask );
sigaddset(&action.sa_mask, SIGALRM);
sigaddset(&action.sa_mask, SIGHUP);
+ sigaddset(&action.sa_mask, SIGUSR1);
+ sigaddset(&action.sa_mask, SIGINT);
+#ifdef SERVERTEXT
+ sigaddset(&action.sa_mask, SIGUSR2);
+#endif
action.sa_flags = SA_RESTART;
- if ( sigaction( SIGTERM, &action, 0 ) < 0 ) {
- syslog( LOG_ERR, "afp_over_dsi: sigaction: %s", strerror(errno) );
- afp_dsi_die(1);
+ if ( sigaction( SIGTERM, &action, NULL ) < 0 ) {
+ LOG(log_error, logtype_afpd, "afp_over_dsi: sigaction: %s", strerror(errno) );
+ afp_dsi_die(EXITERR_SYS);
}
#ifdef SERVERTEXT
/* Added for server message support */
action.sa_handler = afp_dsi_getmesg;
sigemptyset( &action.sa_mask );
- sigaddset(&action.sa_mask, SIGUSR2);
+ sigaddset(&action.sa_mask, SIGALRM);
+ sigaddset(&action.sa_mask, SIGTERM);
+ sigaddset(&action.sa_mask, SIGUSR1);
+ sigaddset(&action.sa_mask, SIGHUP);
+ sigaddset(&action.sa_mask, SIGINT);
action.sa_flags = SA_RESTART;
- if ( sigaction( SIGUSR2, &action, 0) < 0 ) {
- syslog( LOG_ERR, "afp_over_dsi: sigaction: %s", strerror(errno) );
- afp_dsi_die(1);
+ if ( sigaction( SIGUSR2, &action, NULL) < 0 ) {
+ LOG(log_error, logtype_afpd, "afp_over_dsi: sigaction: %s", strerror(errno) );
+ afp_dsi_die(EXITERR_SYS);
}
#endif /* SERVERTEXT */
+ /* SIGUSR1 - set down in 5 minutes */
+ action.sa_handler = afp_dsi_timedown;
+ sigemptyset( &action.sa_mask );
+ sigaddset(&action.sa_mask, SIGALRM);
+ sigaddset(&action.sa_mask, SIGHUP);
+ sigaddset(&action.sa_mask, SIGTERM);
+ sigaddset(&action.sa_mask, SIGINT);
+#ifdef SERVERTEXT
+ sigaddset(&action.sa_mask, SIGUSR2);
+#endif
+ action.sa_flags = SA_RESTART;
+ if ( sigaction( SIGUSR1, &action, NULL) < 0 ) {
+ LOG(log_error, logtype_afpd, "afp_over_dsi: sigaction: %s", strerror(errno) );
+ afp_dsi_die(EXITERR_SYS);
+ }
+
+ /* SIGINT - enable max_debug LOGging to /tmp/afpd.PID.XXXXXX */
+ action.sa_handler = afp_dsi_debug;
+ sigfillset( &action.sa_mask );
+ action.sa_flags = SA_RESTART;
+ if ( sigaction( SIGINT, &action, NULL) < 0 ) {
+ LOG(log_error, logtype_afpd, "afp_over_dsi: sigaction: %s", strerror(errno) );
+ afp_dsi_die(EXITERR_SYS);
+ }
+
+#ifndef DEBUGGING
/* tickle handler */
action.sa_handler = alarm_handler;
sigemptyset(&action.sa_mask);
sigaddset(&action.sa_mask, SIGHUP);
sigaddset(&action.sa_mask, SIGTERM);
+ sigaddset(&action.sa_mask, SIGUSR1);
+ sigaddset(&action.sa_mask, SIGINT);
+#ifdef SERVERTEXT
+ sigaddset(&action.sa_mask, SIGUSR2);
+#endif
action.sa_flags = SA_RESTART;
if ((sigaction(SIGALRM, &action, NULL) < 0) ||
(setitimer(ITIMER_REAL, &dsi->timer, NULL) < 0)) {
- afp_dsi_die(1);
+ afp_dsi_die(EXITERR_SYS);
}
+#endif /* DEBUGGING */
+
+ if (dircache_init(obj->options.dircachesize) != 0)
+ afp_dsi_die(EXITERR_SYS);
/* get stuck here until the end */
while ((cmd = dsi_receive(dsi))) {
child.tickle = 0;
+ child.flags &= ~CHILD_SLEEPING;
+ dsi_sleep(dsi, 0); /* wake up */
+
+ if (reload_request) {
+ reload_request = 0;
+ load_volumes(child.obj);
+ dircache_dump();
+ log_dircache_stat();
+ }
+
+ /* The first SIGINT enables debugging, the next restores the config */
+ if (debug_request) {
+ static int debugging = 0;
+ debug_request = 0;
+
+ if (debugging) {
+ if (obj->options.logconfig)
+ setuplog(obj->options.logconfig);
+ else
+ setuplog("default log_note");
+ debugging = 0;
+ } else {
+ char logstr[50];
+ debugging = 1;
+ sprintf(logstr, "default log_maxdebug /tmp/afpd.%u.XXXXXX", getpid());
+ setuplog(logstr);
+ }
+ }
if (cmd == DSIFUNC_TICKLE) {
- /* so we don't get killed on the client side. */
- if (child.flags & CHILD_DIE)
+ /* timer is not every 30 seconds anymore, so we don't get killed on the client side. */
+ if ((child.flags & CHILD_DIE))
dsi_tickle(dsi);
+ pending_request(dsi);
continue;
- } else if (!(child.flags & CHILD_DIE)) /* reset tickle timer */
- setitimer(ITIMER_REAL, &dsi->timer, NULL);
+ }
+ child.flags |= CHILD_DATA;
switch(cmd) {
case DSIFUNC_CLOSE:
afp_dsi_close(obj);
- syslog(LOG_INFO, "done");
- if (obj->options.flags & OPTION_DEBUG )
- printf("done\n");
+ LOG(log_info, logtype_afpd, "done");
return;
break;
#ifdef AFS
if ( writtenfork ) {
if ( flushfork( writtenfork ) < 0 ) {
- syslog( LOG_ERR, "main flushfork: %s", strerror(errno) );
+ LOG(log_error, logtype_afpd, "main flushfork: %s", strerror(errno) );
}
writtenfork = NULL;
}
#endif /* AFS */
function = (u_char) dsi->commands[0];
- if (obj->options.flags & OPTION_DEBUG ) {
- printf("command: %d\n", function);
- bprint((char *) dsi->commands, dsi->cmdlen);
- }
/* send off an afp command. in a couple cases, we take advantage
* of the fact that we're a stream-based protocol. */
if (afp_switch[function]) {
dsi->datalen = DSI_DATASIZ;
child.flags |= CHILD_RUNNING;
+
+ LOG(log_debug, logtype_afpd, "<== Start AFP command: %s", AfpNum2name(function));
+
err = (*afp_switch[function])(obj,
- dsi->commands, dsi->cmdlen,
- dsi->data, &dsi->datalen);
+ (char *)&dsi->commands, dsi->cmdlen,
+ (char *)&dsi->data, &dsi->datalen);
+
+ LOG(log_debug, logtype_afpd, "==> Finished AFP command: %s -> %s",
+ AfpNum2name(function), AfpErr2name(err));
+#ifdef FORCE_UIDGID
+ /* bring everything back to old euid, egid */
+ if (obj->force_uid)
+ restore_uidgid ( &obj->uidgid );
+#endif /* FORCE_UIDGID */
child.flags &= ~CHILD_RUNNING;
} else {
- syslog(LOG_ERR, "bad function %X", function);
+ LOG(log_error, logtype_afpd, "bad function %X", function);
dsi->datalen = 0;
err = AFPERR_NOOP;
}
break;
}
- if (obj->options.flags & OPTION_DEBUG ) {
- printf( "reply: %d, %d\n", err, dsi->clientID);
- bprint((char *) dsi->data, dsi->datalen);
- }
-
if (!dsi_cmdreply(dsi, err)) {
- syslog(LOG_ERR, "dsi_cmdreply(%d): %s", dsi->socket, strerror(errno) );
- afp_dsi_die(1);
+ LOG(log_error, logtype_afpd, "dsi_cmdreply(%d): %s", dsi->socket, strerror(errno) );
+ afp_dsi_die(EXITERR_CLNT);
}
break;
case DSIFUNC_WRITE: /* FPWrite and FPAddIcon */
function = (u_char) dsi->commands[0];
- if ( obj->options.flags & OPTION_DEBUG ) {
- printf("(write) command: %d, %d\n", function, dsi->cmdlen);
- bprint((char *) dsi->commands, dsi->cmdlen);
- }
-
if ( afp_switch[ function ] != NULL ) {
dsi->datalen = DSI_DATASIZ;
child.flags |= CHILD_RUNNING;
- err = (*afp_switch[function])(obj, dsi->commands, dsi->cmdlen,
- dsi->data, &dsi->datalen);
+
+ LOG(log_debug, logtype_afpd, "<== Start AFP command: %s", AfpNum2name(function));
+
+ err = (*afp_switch[function])(obj,
+ (char *)&dsi->commands, dsi->cmdlen,
+ (char *)&dsi->data, &dsi->datalen);
+
+ LOG(log_debug, logtype_afpd, "==> Finished AFP command: %s -> %s",
+ AfpNum2name(function), AfpErr2name(err));
+
child.flags &= ~CHILD_RUNNING;
+#ifdef FORCE_UIDGID
+ /* bring everything back to old euid, egid */
+ if (obj->force_uid)
+ restore_uidgid ( &obj->uidgid );
+#endif /* FORCE_UIDGID */
} else {
- syslog( LOG_ERR, "(write) bad function %x", function);
+ LOG(log_error, logtype_afpd, "(write) bad function %x", function);
dsi->datalen = 0;
err = AFPERR_NOOP;
}
- if (obj->options.flags & OPTION_DEBUG ) {
- printf( "(write) reply code: %d, %d\n", err, dsi->clientID);
- bprint((char *) dsi->data, dsi->datalen);
- }
-
if (!dsi_wrtreply(dsi, err)) {
- syslog( LOG_ERR, "dsi_wrtreply: %s", strerror(errno) );
- afp_dsi_die(1);
+ LOG(log_error, logtype_afpd, "dsi_wrtreply: %s", strerror(errno) );
+ afp_dsi_die(EXITERR_CLNT);
}
break;
case DSIFUNC_ATTN: /* attention replies */
- continue;
break;
/* error. this usually implies a mismatch of some kind
* between server and client. if things are correct,
* we need to flush the rest of the packet if necessary. */
default:
- syslog(LOG_INFO,"afp_dsi: spurious command %d", cmd);
+ LOG(log_info, logtype_afpd,"afp_dsi: spurious command %d", cmd);
dsi_writeinit(dsi, dsi->data, DSI_DATASIZ);
dsi_writeflush(dsi);
break;
}
-
- if ( obj->options.flags & OPTION_DEBUG ) {
-#ifdef notdef
- pdesc( stdout );
-#endif /* notdef */
- of_pforkdesc( stdout );
- fflush( stdout );
- }
+ pending_request(dsi);
}
/* error */
- afp_dsi_die(1);
+ afp_dsi_die(EXITERR_CLNT);
}
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