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Diffstat (limited to '')
| -rw-r--r-- | server/mpm/netware/mpm_netware.c | 1365 |
1 files changed, 1365 insertions, 0 deletions
diff --git a/server/mpm/netware/mpm_netware.c b/server/mpm/netware/mpm_netware.c new file mode 100644 index 0000000..e89fdef --- /dev/null +++ b/server/mpm/netware/mpm_netware.c @@ -0,0 +1,1365 @@ +/* Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF licenses this file to You under the Apache License, Version 2.0 + * (the "License"); you may not use this file except in compliance with + * the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +/* + * httpd.c: simple http daemon for answering WWW file requests + * + * + * 03-21-93 Rob McCool wrote original code (up to NCSA HTTPd 1.3) + * + * 03-06-95 blong + * changed server number for child-alone processes to 0 and changed name + * of processes + * + * 03-10-95 blong + * Added numerous speed hacks proposed by Robert S. Thau (rst@ai.mit.edu) + * including set group before fork, and call gettime before to fork + * to set up libraries. + * + * 04-14-95 rst / rh + * Brandon's code snarfed from NCSA 1.4, but tinkered to work with the + * Apache server, and also to have child processes do accept() directly. + * + * April-July '95 rst + * Extensive rework for Apache. + */ + +#include "apr.h" +#include "apr_portable.h" +#include "apr_strings.h" +#include "apr_thread_proc.h" +#include "apr_signal.h" +#include "apr_tables.h" +#include "apr_getopt.h" +#include "apr_thread_mutex.h" + +#define APR_WANT_STDIO +#define APR_WANT_STRFUNC +#include "apr_want.h" + +#if APR_HAVE_UNISTD_H +#include <unistd.h> +#endif +#if APR_HAVE_SYS_TYPES_H +#include <sys/types.h> +#endif + +#ifndef USE_WINSOCK +#include <sys/select.h> +#endif + +#include "ap_config.h" +#include "httpd.h" +#include "mpm_default.h" +#include "http_main.h" +#include "http_log.h" +#include "http_config.h" +#include "http_core.h" /* for get_remote_host */ +#include "http_connection.h" +#include "scoreboard.h" +#include "ap_mpm.h" +#include "mpm_common.h" +#include "ap_listen.h" +#include "ap_mmn.h" + +#ifdef HAVE_TIME_H +#include <time.h> +#endif + +#include <signal.h> + +#include <netware.h> +#include <nks/netware.h> +#include <library.h> +#include <screen.h> + +int nlmUnloadSignaled(int wait); + +/* Limit on the total --- clients will be locked out if more servers than + * this are needed. It is intended solely to keep the server from crashing + * when things get out of hand. + * + * We keep a hard maximum number of servers, for two reasons --- first off, + * in case something goes seriously wrong, we want to stop the fork bomb + * short of actually crashing the machine we're running on by filling some + * kernel table. Secondly, it keeps the size of the scoreboard file small + * enough that we can read the whole thing without worrying too much about + * the overhead. + */ +#ifndef HARD_SERVER_LIMIT +#define HARD_SERVER_LIMIT 1 +#endif + +#define WORKER_DEAD SERVER_DEAD +#define WORKER_STARTING SERVER_STARTING +#define WORKER_READY SERVER_READY +#define WORKER_IDLE_KILL SERVER_IDLE_KILL + +#define MPM_HARD_LIMITS_FILE "/mpm_default.h" + +/* *Non*-shared http_main globals... */ + +static int ap_threads_per_child=0; /* Worker threads per child */ +static int ap_threads_to_start=0; +static int ap_threads_min_free=0; +static int ap_threads_max_free=0; +static int ap_threads_limit=0; +static int mpm_state = AP_MPMQ_STARTING; + +/* + * The max child slot ever assigned, preserved across restarts. Necessary + * to deal with MaxRequestWorkers changes across SIGWINCH restarts. We use this + * value to optimize routines that have to scan the entire scoreboard. + */ +static int ap_max_workers_limit = -1; + +int hold_screen_on_exit = 0; /* Indicates whether the screen should be held open */ + +static fd_set listenfds; +static int listenmaxfd; + +static apr_pool_t *pconf; /* Pool for config stuff */ +static apr_pool_t *pmain; /* Pool for httpd child stuff */ + +static pid_t ap_my_pid; /* it seems silly to call getpid all the time */ +static char *ap_my_addrspace = NULL; + +static int die_now = 0; + +/* Keep track of the number of worker threads currently active */ +static unsigned long worker_thread_count; +static int request_count; + +/* Structure used to register/deregister a console handler with the OS */ +static int InstallConsoleHandler(void); +static void RemoveConsoleHandler(void); +static int CommandLineInterpreter(scr_t screenID, const char *commandLine); +static CommandParser_t ConsoleHandler = {0, NULL, 0}; +#define HANDLEDCOMMAND 0 +#define NOTMYCOMMAND 1 + +static int show_settings = 0; + +//#define DBINFO_ON +//#define DBPRINT_ON +#ifdef DBPRINT_ON +#define DBPRINT0(s) printf(s) +#define DBPRINT1(s,v1) printf(s,v1) +#define DBPRINT2(s,v1,v2) printf(s,v1,v2) +#else +#define DBPRINT0(s) +#define DBPRINT1(s,v1) +#define DBPRINT2(s,v1,v2) +#endif + +/* volatile just in case */ +static int volatile shutdown_pending; +static int volatile restart_pending; +static int volatile is_graceful; +static int volatile wait_to_finish=1; +static ap_generation_t volatile ap_my_generation=0; + +/* a clean exit from a child with proper cleanup */ +static void clean_child_exit(int code, int worker_num, apr_pool_t *ptrans, + apr_bucket_alloc_t *bucket_alloc) __attribute__ ((noreturn)); +static void clean_child_exit(int code, int worker_num, apr_pool_t *ptrans, + apr_bucket_alloc_t *bucket_alloc) +{ + apr_bucket_alloc_destroy(bucket_alloc); + if (!shutdown_pending) { + apr_pool_destroy(ptrans); + } + + atomic_dec (&worker_thread_count); + if (worker_num >=0) + ap_update_child_status_from_indexes(0, worker_num, WORKER_DEAD, + (request_rec *) NULL); + NXThreadExit((void*)&code); +} + +/* proper cleanup when returning from ap_mpm_run() */ +static void mpm_main_cleanup(void) +{ + if (pmain) { + apr_pool_destroy(pmain); + } +} + +static int netware_query(int query_code, int *result, apr_status_t *rv) +{ + *rv = APR_SUCCESS; + switch(query_code){ + case AP_MPMQ_MAX_DAEMON_USED: + *result = 1; + break; + case AP_MPMQ_IS_THREADED: + *result = AP_MPMQ_DYNAMIC; + break; + case AP_MPMQ_IS_FORKED: + *result = AP_MPMQ_NOT_SUPPORTED; + break; + case AP_MPMQ_HARD_LIMIT_DAEMONS: + *result = HARD_SERVER_LIMIT; + break; + case AP_MPMQ_HARD_LIMIT_THREADS: + *result = HARD_THREAD_LIMIT; + break; + case AP_MPMQ_MAX_THREADS: + *result = ap_threads_limit; + break; + case AP_MPMQ_MIN_SPARE_DAEMONS: + *result = 0; + break; + case AP_MPMQ_MIN_SPARE_THREADS: + *result = ap_threads_min_free; + break; + case AP_MPMQ_MAX_SPARE_DAEMONS: + *result = 0; + break; + case AP_MPMQ_MAX_SPARE_THREADS: + *result = ap_threads_max_free; + break; + case AP_MPMQ_MAX_REQUESTS_DAEMON: + *result = ap_max_requests_per_child; + break; + case AP_MPMQ_MAX_DAEMONS: + *result = 1; + break; + case AP_MPMQ_MPM_STATE: + *result = mpm_state; + break; + case AP_MPMQ_GENERATION: + *result = ap_my_generation; + break; + default: + *rv = APR_ENOTIMPL; + break; + } + return OK; +} + +static const char *netware_get_name(void) +{ + return "NetWare"; +} + +/***************************************************************** + * Connection structures and accounting... + */ + +static void mpm_term(void) +{ + RemoveConsoleHandler(); + wait_to_finish = 0; + NXThreadYield(); +} + +static void sig_term(int sig) +{ + if (shutdown_pending == 1) { + /* Um, is this _probably_ not an error, if the user has + * tried to do a shutdown twice quickly, so we won't + * worry about reporting it. + */ + return; + } + shutdown_pending = 1; + + DBPRINT0 ("waiting for threads\n"); + while (wait_to_finish) { + apr_thread_yield(); + } + DBPRINT0 ("goodbye\n"); +} + +/* restart() is the signal handler for SIGHUP and SIGWINCH + * in the parent process, unless running in ONE_PROCESS mode + */ +static void restart(void) +{ + if (restart_pending == 1) { + /* Probably not an error - don't bother reporting it */ + return; + } + restart_pending = 1; + is_graceful = 1; +} + +static void set_signals(void) +{ + apr_signal(SIGTERM, sig_term); + apr_signal(SIGABRT, sig_term); +} + +int nlmUnloadSignaled(int wait) +{ + shutdown_pending = 1; + + if (wait) { + while (wait_to_finish) { + NXThreadYield(); + } + } + + return 0; +} + +/***************************************************************** + * Child process main loop. + * The following vars are static to avoid getting clobbered by longjmp(); + * they are really private to child_main. + */ + + +#define MAX_WB_RETRIES 3 +#ifdef DBINFO_ON +static int would_block = 0; +static int retry_success = 0; +static int retry_fail = 0; +static int avg_retries = 0; +#endif + +/*static */ +void worker_main(void *arg) +{ + ap_listen_rec *lr, *first_lr, *last_lr = NULL; + apr_pool_t *ptrans; + apr_allocator_t *allocator; + apr_bucket_alloc_t *bucket_alloc; + conn_rec *current_conn; + apr_status_t stat = APR_EINIT; + ap_sb_handle_t *sbh; + apr_thread_t *thd = NULL; + apr_os_thread_t osthd; + + int my_worker_num = (int)arg; + apr_socket_t *csd = NULL; + int requests_this_child = 0; + apr_socket_t *sd = NULL; + fd_set main_fds; + + int sockdes; + int srv; + struct timeval tv; + int wouldblock_retry; + + osthd = apr_os_thread_current(); + apr_os_thread_put(&thd, &osthd, pmain); + + tv.tv_sec = 1; + tv.tv_usec = 0; + + apr_allocator_create(&allocator); + apr_allocator_max_free_set(allocator, ap_max_mem_free); + + apr_pool_create_ex(&ptrans, pmain, NULL, allocator); + apr_allocator_owner_set(allocator, ptrans); + apr_pool_tag(ptrans, "transaction"); + + bucket_alloc = apr_bucket_alloc_create_ex(allocator); + + atomic_inc (&worker_thread_count); + + while (!die_now) { + /* + * (Re)initialize this child to a pre-connection state. + */ + current_conn = NULL; + apr_pool_clear(ptrans); + + if ((ap_max_requests_per_child > 0 + && requests_this_child++ >= ap_max_requests_per_child)) { + DBPRINT1 ("\n**Thread slot %d is shutting down", my_worker_num); + clean_child_exit(0, my_worker_num, ptrans, bucket_alloc); + } + + ap_update_child_status_from_indexes(0, my_worker_num, WORKER_READY, + (request_rec *) NULL); + + /* + * Wait for an acceptable connection to arrive. + */ + + for (;;) { + if (shutdown_pending || restart_pending || (ap_scoreboard_image->servers[0][my_worker_num].status == WORKER_IDLE_KILL)) { + DBPRINT1 ("\nThread slot %d is shutting down\n", my_worker_num); + clean_child_exit(0, my_worker_num, ptrans, bucket_alloc); + } + + /* Check the listen queue on all sockets for requests */ + memcpy(&main_fds, &listenfds, sizeof(fd_set)); + srv = select(listenmaxfd + 1, &main_fds, NULL, NULL, &tv); + + if (srv <= 0) { + if (srv < 0) { + ap_log_error(APLOG_MARK, APLOG_NOTICE, 0, ap_server_conf, APLOGNO(00217) + "select() failed on listen socket"); + apr_thread_yield(); + } + continue; + } + + /* remember the last_lr we searched last time around so that + we don't end up starving any particular listening socket */ + if (last_lr == NULL) { + lr = ap_listeners; + } + else { + lr = last_lr->next; + if (!lr) + lr = ap_listeners; + } + first_lr = lr; + do { + apr_os_sock_get(&sockdes, lr->sd); + if (FD_ISSET(sockdes, &main_fds)) + goto got_listener; + lr = lr->next; + if (!lr) + lr = ap_listeners; + } while (lr != first_lr); + /* if we get here, something unexpected happened. Go back + into the select state and try again. + */ + continue; + got_listener: + last_lr = lr; + sd = lr->sd; + + wouldblock_retry = MAX_WB_RETRIES; + + while (wouldblock_retry) { + if ((stat = apr_socket_accept(&csd, sd, ptrans)) == APR_SUCCESS) { + break; + } + else { + /* if the error is a wouldblock then maybe we were too + quick try to pull the next request from the listen + queue. Try a few more times then return to our idle + listen state. */ + if (!APR_STATUS_IS_EAGAIN(stat)) { + break; + } + + if (wouldblock_retry--) { + apr_thread_yield(); + } + } + } + + /* If we got a new socket, set it to non-blocking mode and process + it. Otherwise handle the error. */ + if (stat == APR_SUCCESS) { + apr_socket_opt_set(csd, APR_SO_NONBLOCK, 0); +#ifdef DBINFO_ON + if (wouldblock_retry < MAX_WB_RETRIES) { + retry_success++; + avg_retries += (MAX_WB_RETRIES-wouldblock_retry); + } +#endif + break; /* We have a socket ready for reading */ + } + else { +#ifdef DBINFO_ON + if (APR_STATUS_IS_EAGAIN(stat)) { + would_block++; + retry_fail++; + } + else if ( +#else + if (APR_STATUS_IS_EAGAIN(stat) || +#endif + APR_STATUS_IS_ECONNRESET(stat) || + APR_STATUS_IS_ETIMEDOUT(stat) || + APR_STATUS_IS_EHOSTUNREACH(stat) || + APR_STATUS_IS_ENETUNREACH(stat)) { + ; + } +#ifdef USE_WINSOCK + else if (APR_STATUS_IS_ENETDOWN(stat)) { + /* + * When the network layer has been shut down, there + * is not much use in simply exiting: the parent + * would simply re-create us (and we'd fail again). + * Use the CHILDFATAL code to tear the server down. + * @@@ Martin's idea for possible improvement: + * A different approach would be to define + * a new APEXIT_NETDOWN exit code, the reception + * of which would make the parent shutdown all + * children, then idle-loop until it detected that + * the network is up again, and restart the children. + * Ben Hyde noted that temporary ENETDOWN situations + * occur in mobile IP. + */ + ap_log_error(APLOG_MARK, APLOG_EMERG, stat, ap_server_conf, APLOGNO(00218) + "apr_socket_accept: giving up."); + clean_child_exit(APEXIT_CHILDFATAL, my_worker_num, ptrans, + bucket_alloc); + } +#endif + else { + ap_log_error(APLOG_MARK, APLOG_ERR, stat, ap_server_conf, APLOGNO(00219) + "apr_socket_accept: (client socket)"); + clean_child_exit(1, my_worker_num, ptrans, bucket_alloc); + } + } + } + + ap_create_sb_handle(&sbh, ptrans, 0, my_worker_num); + /* + * We now have a connection, so set it up with the appropriate + * socket options, file descriptors, and read/write buffers. + */ + current_conn = ap_run_create_connection(ptrans, ap_server_conf, csd, + my_worker_num, sbh, + bucket_alloc); + if (current_conn) { + current_conn->current_thread = thd; + ap_process_connection(current_conn, csd); + ap_lingering_close(current_conn); + } + request_count++; + } + clean_child_exit(0, my_worker_num, ptrans, bucket_alloc); +} + + +static int make_child(server_rec *s, int slot) +{ + int tid; + int err=0; + NXContext_t ctx; + + if (slot + 1 > ap_max_workers_limit) { + ap_max_workers_limit = slot + 1; + } + + ap_update_child_status_from_indexes(0, slot, WORKER_STARTING, + (request_rec *) NULL); + + if (ctx = NXContextAlloc((void (*)(void *)) worker_main, (void*)slot, NX_PRIO_MED, ap_thread_stacksize, NX_CTX_NORMAL, &err)) { + char threadName[32]; + + sprintf (threadName, "Apache_Worker %d", slot); + NXContextSetName(ctx, threadName); + err = NXThreadCreate(ctx, NX_THR_BIND_CONTEXT, &tid); + if (err) { + NXContextFree (ctx); + } + } + + if (err) { + /* create thread didn't succeed. Fix the scoreboard or else + * it will say SERVER_STARTING forever and ever + */ + ap_update_child_status_from_indexes(0, slot, WORKER_DEAD, + (request_rec *) NULL); + + /* In case system resources are maxxed out, we don't want + Apache running away with the CPU trying to fork over and + over and over again. */ + apr_thread_yield(); + + return -1; + } + + ap_scoreboard_image->servers[0][slot].tid = tid; + + return 0; +} + + +/* start up a bunch of worker threads */ +static void startup_workers(int number_to_start) +{ + int i; + + for (i = 0; number_to_start && i < ap_threads_limit; ++i) { + if (ap_scoreboard_image->servers[0][i].status != WORKER_DEAD) { + continue; + } + if (make_child(ap_server_conf, i) < 0) { + break; + } + --number_to_start; + } +} + + +/* + * idle_spawn_rate is the number of children that will be spawned on the + * next maintenance cycle if there aren't enough idle servers. It is + * doubled up to MAX_SPAWN_RATE, and reset only when a cycle goes by + * without the need to spawn. + */ +static int idle_spawn_rate = 1; +#ifndef MAX_SPAWN_RATE +#define MAX_SPAWN_RATE (64) +#endif +static int hold_off_on_exponential_spawning; + +static void perform_idle_server_maintenance(apr_pool_t *p) +{ + int i; + int idle_count; + worker_score *ws; + int free_length; + int free_slots[MAX_SPAWN_RATE]; + int last_non_dead; + int total_non_dead; + + /* initialize the free_list */ + free_length = 0; + + idle_count = 0; + last_non_dead = -1; + total_non_dead = 0; + + for (i = 0; i < ap_threads_limit; ++i) { + int status; + + if (i >= ap_max_workers_limit && free_length == idle_spawn_rate) + break; + ws = &ap_scoreboard_image->servers[0][i]; + status = ws->status; + if (status == WORKER_DEAD) { + /* try to keep children numbers as low as possible */ + if (free_length < idle_spawn_rate) { + free_slots[free_length] = i; + ++free_length; + } + } + else if (status == WORKER_IDLE_KILL) { + /* If it is already marked to die, skip it */ + continue; + } + else { + /* We consider a starting server as idle because we started it + * at least a cycle ago, and if it still hasn't finished starting + * then we're just going to swamp things worse by forking more. + * So we hopefully won't need to fork more if we count it. + * This depends on the ordering of SERVER_READY and SERVER_STARTING. + */ + if (status <= WORKER_READY) { + ++ idle_count; + } + + ++total_non_dead; + last_non_dead = i; + } + } + DBPRINT2("Total: %d Idle Count: %d \r", total_non_dead, idle_count); + ap_max_workers_limit = last_non_dead + 1; + if (idle_count > ap_threads_max_free) { + /* kill off one child... we use the pod because that'll cause it to + * shut down gracefully, in case it happened to pick up a request + * while we were counting + */ + idle_spawn_rate = 1; + ap_update_child_status_from_indexes(0, last_non_dead, WORKER_IDLE_KILL, + (request_rec *) NULL); + DBPRINT1("\nKilling idle thread: %d\n", last_non_dead); + } + else if (idle_count < ap_threads_min_free) { + /* terminate the free list */ + if (free_length == 0) { + /* only report this condition once */ + static int reported = 0; + + if (!reported) { + ap_log_error(APLOG_MARK, APLOG_ERR, 0, ap_server_conf, APLOGNO(00220) + "server reached MaxRequestWorkers setting, consider" + " raising the MaxRequestWorkers setting"); + reported = 1; + } + idle_spawn_rate = 1; + } + else { + if (idle_spawn_rate >= 8) { + ap_log_error(APLOG_MARK, APLOG_INFO, 0, ap_server_conf, APLOGNO(00221) + "server seems busy, (you may need " + "to increase StartServers, or Min/MaxSpareServers), " + "spawning %d children, there are %d idle, and " + "%d total children", idle_spawn_rate, + idle_count, total_non_dead); + } + DBPRINT0("\n"); + for (i = 0; i < free_length; ++i) { + DBPRINT1("Spawning additional thread slot: %d\n", free_slots[i]); + make_child(ap_server_conf, free_slots[i]); + } + /* the next time around we want to spawn twice as many if this + * wasn't good enough, but not if we've just done a graceful + */ + if (hold_off_on_exponential_spawning) { + --hold_off_on_exponential_spawning; + } + else if (idle_spawn_rate < MAX_SPAWN_RATE) { + idle_spawn_rate *= 2; + } + } + } + else { + idle_spawn_rate = 1; + } +} + +static void display_settings() +{ + int status_array[SERVER_NUM_STATUS]; + int i, status, total=0; + int reqs = request_count; +#ifdef DBINFO_ON + int wblock = would_block; + + would_block = 0; +#endif + + request_count = 0; + + ClearScreen (getscreenhandle()); + printf("%s \n", ap_get_server_description()); + + for (i=0;i<SERVER_NUM_STATUS;i++) { + status_array[i] = 0; + } + + for (i = 0; i < ap_threads_limit; ++i) { + status = (ap_scoreboard_image->servers[0][i]).status; + status_array[status]++; + } + + for (i=0;i<SERVER_NUM_STATUS;i++) { + switch(i) + { + case SERVER_DEAD: + printf ("Available:\t%d\n", status_array[i]); + break; + case SERVER_STARTING: + printf ("Starting:\t%d\n", status_array[i]); + break; + case SERVER_READY: + printf ("Ready:\t\t%d\n", status_array[i]); + break; + case SERVER_BUSY_READ: + printf ("Busy:\t\t%d\n", status_array[i]); + break; + case SERVER_BUSY_WRITE: + printf ("Busy Write:\t%d\n", status_array[i]); + break; + case SERVER_BUSY_KEEPALIVE: + printf ("Busy Keepalive:\t%d\n", status_array[i]); + break; + case SERVER_BUSY_LOG: + printf ("Busy Log:\t%d\n", status_array[i]); + break; + case SERVER_BUSY_DNS: + printf ("Busy DNS:\t%d\n", status_array[i]); + break; + case SERVER_CLOSING: + printf ("Closing:\t%d\n", status_array[i]); + break; + case SERVER_GRACEFUL: + printf ("Restart:\t%d\n", status_array[i]); + break; + case SERVER_IDLE_KILL: + printf ("Idle Kill:\t%d\n", status_array[i]); + break; + default: + printf ("Unknown Status:\t%d\n", status_array[i]); + break; + } + if (i != SERVER_DEAD) + total+=status_array[i]; + } + printf ("Total Running:\t%d\tout of: \t%d\n", total, ap_threads_limit); + printf ("Requests per interval:\t%d\n", reqs); + +#ifdef DBINFO_ON + printf ("Would blocks:\t%d\n", wblock); + printf ("Successful retries:\t%d\n", retry_success); + printf ("Failed retries:\t%d\n", retry_fail); + printf ("Avg retries:\t%d\n", retry_success == 0 ? 0 : avg_retries / retry_success); +#endif +} + +static void show_server_data() +{ + ap_listen_rec *lr; + module **m; + + printf("%s\n", ap_get_server_description()); + if (ap_my_addrspace && (ap_my_addrspace[0] != 'O') && (ap_my_addrspace[1] != 'S')) + printf(" Running in address space %s\n", ap_my_addrspace); + + + /* Display listening ports */ + printf(" Listening on port(s):"); + lr = ap_listeners; + do { + printf(" %d", lr->bind_addr->port); + lr = lr->next; + } while (lr && lr != ap_listeners); + + /* Display dynamic modules loaded */ + printf("\n"); + for (m = ap_loaded_modules; *m != NULL; m++) { + if (((module*)*m)->dynamic_load_handle) { + printf(" Loaded dynamic module %s\n", ((module*)*m)->name); + } + } +} + + +static int setup_listeners(server_rec *s) +{ + ap_listen_rec *lr; + int sockdes; + + if (ap_setup_listeners(s) < 1 ) { + ap_log_error(APLOG_MARK, APLOG_ALERT, 0, s, APLOGNO(00222) + "no listening sockets available, shutting down"); + return -1; + } + + listenmaxfd = -1; + FD_ZERO(&listenfds); + for (lr = ap_listeners; lr; lr = lr->next) { + apr_os_sock_get(&sockdes, lr->sd); + FD_SET(sockdes, &listenfds); + if (sockdes > listenmaxfd) { + listenmaxfd = sockdes; + } + } + return 0; +} + +static int shutdown_listeners() +{ + ap_listen_rec *lr; + + for (lr = ap_listeners; lr; lr = lr->next) { + apr_socket_close(lr->sd); + } + ap_listeners = NULL; + return 0; +} + +/***************************************************************** + * Executive routines. + */ + +static int netware_run(apr_pool_t *_pconf, apr_pool_t *plog, server_rec *s) +{ + apr_status_t status=0; + + pconf = _pconf; + ap_server_conf = s; + + if (setup_listeners(s)) { + ap_log_error(APLOG_MARK, APLOG_ALERT, status, s, APLOGNO(00223) + "no listening sockets available, shutting down"); + return !OK; + } + + restart_pending = shutdown_pending = 0; + worker_thread_count = 0; + + if (!is_graceful) { + if (ap_run_pre_mpm(s->process->pool, SB_NOT_SHARED) != OK) { + return !OK; + } + } + + /* Only set slot 0 since that is all NetWare will ever have. */ + ap_scoreboard_image->parent[0].pid = getpid(); + ap_scoreboard_image->parent[0].generation = ap_my_generation; + ap_run_child_status(ap_server_conf, + ap_scoreboard_image->parent[0].pid, + ap_my_generation, + 0, + MPM_CHILD_STARTED); + + set_signals(); + + apr_pool_create(&pmain, pconf); + apr_pool_tag(pmain, "pmain"); + ap_run_child_init(pmain, ap_server_conf); + + if (ap_threads_max_free < ap_threads_min_free + 1) /* Don't thrash... */ + ap_threads_max_free = ap_threads_min_free + 1; + request_count = 0; + + startup_workers(ap_threads_to_start); + + /* Allow the Apache screen to be closed normally on exit() only if it + has not been explicitly forced to close on exit(). (ie. the -E flag + was specified at startup) */ + if (hold_screen_on_exit > 0) { + hold_screen_on_exit = 0; + } + + ap_log_error(APLOG_MARK, APLOG_NOTICE, 0, ap_server_conf, APLOGNO(00224) + "%s configured -- resuming normal operations", + ap_get_server_description()); + ap_log_error(APLOG_MARK, APLOG_INFO, 0, ap_server_conf, APLOGNO(00225) + "Server built: %s", ap_get_server_built()); + ap_log_command_line(plog, s); + ap_log_mpm_common(s); + show_server_data(); + + mpm_state = AP_MPMQ_RUNNING; + while (!restart_pending && !shutdown_pending) { + perform_idle_server_maintenance(pconf); + if (show_settings) + display_settings(); + apr_thread_yield(); + apr_sleep(SCOREBOARD_MAINTENANCE_INTERVAL); + } + mpm_state = AP_MPMQ_STOPPING; + + ap_run_child_status(ap_server_conf, + ap_scoreboard_image->parent[0].pid, + ap_my_generation, + 0, + MPM_CHILD_EXITED); + + /* Shutdown the listen sockets so that we don't get stuck in a blocking call. + shutdown_listeners();*/ + + if (shutdown_pending) { /* Got an unload from the console */ + ap_log_error(APLOG_MARK, APLOG_NOTICE, 0, ap_server_conf, APLOGNO(00226) + "caught SIGTERM, shutting down"); + + while (worker_thread_count > 0) { + printf ("\rShutdown pending. Waiting for %lu thread(s) to terminate...", + worker_thread_count); + apr_thread_yield(); + } + + mpm_main_cleanup(); + return DONE; + } + else { /* the only other way out is a restart */ + /* advance to the next generation */ + /* XXX: we really need to make sure this new generation number isn't in + * use by any of the children. + */ + ++ap_my_generation; + ap_scoreboard_image->global->running_generation = ap_my_generation; + + ap_log_error(APLOG_MARK, APLOG_NOTICE, 0, ap_server_conf, APLOGNO(00227) + "Graceful restart requested, doing restart"); + + /* Wait for all of the threads to terminate before initiating the restart */ + while (worker_thread_count > 0) { + printf ("\rRestart pending. Waiting for %lu thread(s) to terminate...", + worker_thread_count); + apr_thread_yield(); + } + printf ("\nRestarting...\n"); + } + + mpm_main_cleanup(); + return OK; +} + +static int netware_pre_config(apr_pool_t *p, apr_pool_t *plog, apr_pool_t *ptemp) +{ + char *addrname = NULL; + + mpm_state = AP_MPMQ_STARTING; + + is_graceful = 0; + ap_my_pid = getpid(); + addrname = getaddressspacename (NULL, NULL); + if (addrname) { + ap_my_addrspace = apr_pstrdup (p, addrname); + free (addrname); + } + +#ifndef USE_WINSOCK + /* The following call has been moved to the mod_nw_ssl pre-config handler */ + ap_listen_pre_config(); +#endif + + ap_threads_to_start = DEFAULT_START_THREADS; + ap_threads_min_free = DEFAULT_MIN_FREE_THREADS; + ap_threads_max_free = DEFAULT_MAX_FREE_THREADS; + ap_threads_limit = HARD_THREAD_LIMIT; + ap_extended_status = 0; + + /* override core's default thread stacksize */ + ap_thread_stacksize = DEFAULT_THREAD_STACKSIZE; + + return OK; +} + +static int netware_check_config(apr_pool_t *p, apr_pool_t *plog, + apr_pool_t *ptemp, server_rec *s) +{ + static int restart_num = 0; + int startup = 0; + + /* we want this only the first time around */ + if (restart_num++ == 0) { + startup = 1; + } + + if (ap_threads_limit > HARD_THREAD_LIMIT) { + if (startup) { + ap_log_error(APLOG_MARK, APLOG_WARNING | APLOG_STARTUP, 0, NULL, APLOGNO(00228) + "WARNING: MaxThreads of %d exceeds compile-time " + "limit of %d threads, decreasing to %d. " + "To increase, please see the HARD_THREAD_LIMIT " + "define in server/mpm/netware%s.", + ap_threads_limit, HARD_THREAD_LIMIT, HARD_THREAD_LIMIT, + MPM_HARD_LIMITS_FILE); + } else { + ap_log_error(APLOG_MARK, APLOG_WARNING, 0, s, APLOGNO(00229) + "MaxThreads of %d exceeds compile-time limit " + "of %d, decreasing to match", + ap_threads_limit, HARD_THREAD_LIMIT); + } + ap_threads_limit = HARD_THREAD_LIMIT; + } + else if (ap_threads_limit < 1) { + if (startup) { + ap_log_error(APLOG_MARK, APLOG_WARNING | APLOG_STARTUP, 0, NULL, APLOGNO(00230) + "WARNING: MaxThreads of %d not allowed, " + "increasing to 1.", ap_threads_limit); + } else { + ap_log_error(APLOG_MARK, APLOG_WARNING, 0, s, APLOGNO(02661) + "MaxThreads of %d not allowed, increasing to 1", + ap_threads_limit); + } + ap_threads_limit = 1; + } + + /* ap_threads_to_start > ap_threads_limit effectively checked in + * call to startup_workers(ap_threads_to_start) in ap_mpm_run() + */ + if (ap_threads_to_start < 0) { + if (startup) { + ap_log_error(APLOG_MARK, APLOG_WARNING | APLOG_STARTUP, 0, NULL, APLOGNO(00231) + "WARNING: StartThreads of %d not allowed, " + "increasing to 1.", ap_threads_to_start); + } else { + ap_log_error(APLOG_MARK, APLOG_WARNING, 0, s, APLOGNO(00232) + "StartThreads of %d not allowed, increasing to 1", + ap_threads_to_start); + } + ap_threads_to_start = 1; + } + + if (ap_threads_min_free < 1) { + if (startup) { + ap_log_error(APLOG_MARK, APLOG_WARNING | APLOG_STARTUP, 0, NULL, APLOGNO(00233) + "WARNING: MinSpareThreads of %d not allowed, " + "increasing to 1 to avoid almost certain server failure. " + "Please read the documentation.", ap_threads_min_free); + } else { + ap_log_error(APLOG_MARK, APLOG_WARNING, 0, s, APLOGNO(00234) + "MinSpareThreads of %d not allowed, increasing to 1", + ap_threads_min_free); + } + ap_threads_min_free = 1; + } + + /* ap_threads_max_free < ap_threads_min_free + 1 checked in ap_mpm_run() */ + + return OK; +} + +static void netware_mpm_hooks(apr_pool_t *p) +{ + /* Run the pre-config hook after core's so that it can override the + * default setting of ThreadStackSize for NetWare. + */ + static const char * const predecessors[] = {"core.c", NULL}; + + ap_hook_pre_config(netware_pre_config, predecessors, NULL, APR_HOOK_MIDDLE); + ap_hook_check_config(netware_check_config, NULL, NULL, APR_HOOK_MIDDLE); + //ap_hook_post_config(netware_post_config, NULL, NULL, 0); + //ap_hook_child_init(netware_child_init, NULL, NULL, APR_HOOK_MIDDLE); + //ap_hook_open_logs(netware_open_logs, NULL, aszSucc, APR_HOOK_REALLY_FIRST); + ap_hook_mpm(netware_run, NULL, NULL, APR_HOOK_MIDDLE); + ap_hook_mpm_query(netware_query, NULL, NULL, APR_HOOK_MIDDLE); + ap_hook_mpm_get_name(netware_get_name, NULL, NULL, APR_HOOK_MIDDLE); +} + +static void netware_rewrite_args(process_rec *process) +{ + char *def_server_root; + char optbuf[3]; + const char *opt_arg; + apr_getopt_t *opt; + apr_array_header_t *mpm_new_argv; + + + atexit (mpm_term); + InstallConsoleHandler(); + + /* Make sure to hold the Apache screen open if exit() is called */ + hold_screen_on_exit = 1; + + /* Rewrite process->argv[]; + * + * add default -d serverroot from the path of this executable + * + * The end result will look like: + * The -d serverroot default from the running executable + */ + if (process->argc > 0) { + char *s = apr_pstrdup (process->pconf, process->argv[0]); + if (s) { + int i, len = strlen(s); + + for (i=len; i; i--) { + if (s[i] == '\\' || s[i] == '/') { + s[i] = '\0'; + apr_filepath_merge(&def_server_root, NULL, s, + APR_FILEPATH_TRUENAME, process->pool); + break; + } + } + /* Use process->pool so that the rewritten argv + * lasts for the lifetime of the server process, + * because pconf will be destroyed after the + * initial pre-flight of the config parser. + */ + mpm_new_argv = apr_array_make(process->pool, process->argc + 2, + sizeof(const char *)); + *(const char **)apr_array_push(mpm_new_argv) = process->argv[0]; + *(const char **)apr_array_push(mpm_new_argv) = "-d"; + *(const char **)apr_array_push(mpm_new_argv) = def_server_root; + + optbuf[0] = '-'; + optbuf[2] = '\0'; + apr_getopt_init(&opt, process->pool, process->argc, process->argv); + while (apr_getopt(opt, AP_SERVER_BASEARGS"n:", optbuf + 1, &opt_arg) == APR_SUCCESS) { + switch (optbuf[1]) { + case 'n': + if (opt_arg) { + renamescreen(opt_arg); + } + break; + case 'E': + /* Don't need to hold the screen open if the output is going to a file */ + hold_screen_on_exit = -1; + default: + *(const char **)apr_array_push(mpm_new_argv) = + apr_pstrdup(process->pool, optbuf); + + if (opt_arg) { + *(const char **)apr_array_push(mpm_new_argv) = opt_arg; + } + break; + } + } + process->argc = mpm_new_argv->nelts; + process->argv = (const char * const *) mpm_new_argv->elts; + } + } +} + +static int CommandLineInterpreter(scr_t screenID, const char *commandLine) +{ + char *szCommand = "APACHE2 "; + int iCommandLen = 8; + char szcommandLine[256]; + char *pID; + screenID = screenID; + + + if (commandLine == NULL) + return NOTMYCOMMAND; + if (strlen(commandLine) <= strlen(szCommand)) + return NOTMYCOMMAND; + + apr_cpystrn(szcommandLine, commandLine, sizeof(szcommandLine)); + + /* All added commands begin with "APACHE2 " */ + + if (!strnicmp(szCommand, szcommandLine, iCommandLen)) { + ActivateScreen (getscreenhandle()); + + /* If an instance id was not given but the nlm is loaded in + protected space, then the command belongs to the + OS address space instance to pass it on. */ + pID = strstr (szcommandLine, "-p"); + if ((pID == NULL) && nlmisloadedprotected()) + return NOTMYCOMMAND; + + /* If we got an instance id but it doesn't match this + instance of the nlm, pass it on. */ + if (pID) { + pID = &pID[2]; + while (*pID && (*pID == ' ')) + pID++; + } + if (pID && ap_my_addrspace && strnicmp(pID, ap_my_addrspace, strlen(ap_my_addrspace))) + return NOTMYCOMMAND; + + /* If we have determined that this command belongs to this + instance of the nlm, then handle it. */ + if (!strnicmp("RESTART",&szcommandLine[iCommandLen],3)) { + printf("Restart Requested...\n"); + restart(); + } + else if (!strnicmp("VERSION",&szcommandLine[iCommandLen],3)) { + printf("Server version: %s\n", ap_get_server_description()); + printf("Server built: %s\n", ap_get_server_built()); + } + else if (!strnicmp("MODULES",&szcommandLine[iCommandLen],3)) { + ap_show_modules(); + } + else if (!strnicmp("DIRECTIVES",&szcommandLine[iCommandLen],3)) { + ap_show_directives(); + } + else if (!strnicmp("SHUTDOWN",&szcommandLine[iCommandLen],3)) { + printf("Shutdown Requested...\n"); + shutdown_pending = 1; + } + else if (!strnicmp("SETTINGS",&szcommandLine[iCommandLen],3)) { + if (show_settings) { + show_settings = 0; + ClearScreen (getscreenhandle()); + show_server_data(); + } + else { + show_settings = 1; + display_settings(); + } + } + else { + show_settings = 0; + if (strnicmp("HELP",&szcommandLine[iCommandLen],3)) + printf("Unknown APACHE2 command %s\n", &szcommandLine[iCommandLen]); + printf("Usage: APACHE2 [command] [-p <instance ID>]\n"); + printf("Commands:\n"); + printf("\tDIRECTIVES - Show directives\n"); + printf("\tHELP - Display this help information\n"); + printf("\tMODULES - Show a list of the loaded modules\n"); + printf("\tRESTART - Reread the configuration file and restart Apache\n"); + printf("\tSETTINGS - Show current thread status\n"); + printf("\tSHUTDOWN - Shutdown Apache\n"); + printf("\tVERSION - Display the server version information\n"); + } + + /* Tell NetWare we handled the command */ + return HANDLEDCOMMAND; + } + + /* Tell NetWare that the command isn't mine */ + return NOTMYCOMMAND; +} + +static int InstallConsoleHandler(void) +{ + /* Our command line handler interfaces the system operator + with this NLM */ + + NX_WRAP_INTERFACE(CommandLineInterpreter, 2, (void*)&(ConsoleHandler.parser)); + + ConsoleHandler.rTag = AllocateResourceTag(getnlmhandle(), "Command Line Processor", + ConsoleCommandSignature); + if (!ConsoleHandler.rTag) + { + printf("Error on allocate resource tag\n"); + return 1; + } + + RegisterConsoleCommand(&ConsoleHandler); + + /* The Remove procedure unregisters the console handler */ + + return 0; +} + +static void RemoveConsoleHandler(void) +{ + UnRegisterConsoleCommand(&ConsoleHandler); + NX_UNWRAP_INTERFACE(ConsoleHandler.parser); +} + +static const char *set_threads_to_start(cmd_parms *cmd, void *dummy, const char *arg) +{ + const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY); + if (err != NULL) { + return err; + } + + ap_threads_to_start = atoi(arg); + return NULL; +} + +static const char *set_min_free_threads(cmd_parms *cmd, void *dummy, const char *arg) +{ + const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY); + if (err != NULL) { + return err; + } + + ap_threads_min_free = atoi(arg); + return NULL; +} + +static const char *set_max_free_threads(cmd_parms *cmd, void *dummy, const char *arg) +{ + const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY); + if (err != NULL) { + return err; + } + + ap_threads_max_free = atoi(arg); + return NULL; +} + +static const char *set_thread_limit (cmd_parms *cmd, void *dummy, const char *arg) +{ + const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY); + if (err != NULL) { + return err; + } + + ap_threads_limit = atoi(arg); + return NULL; +} + +static const command_rec netware_mpm_cmds[] = { +LISTEN_COMMANDS, +AP_INIT_TAKE1("StartThreads", set_threads_to_start, NULL, RSRC_CONF, + "Number of worker threads launched at server startup"), +AP_INIT_TAKE1("MinSpareThreads", set_min_free_threads, NULL, RSRC_CONF, + "Minimum number of idle threads, to handle request spikes"), +AP_INIT_TAKE1("MaxSpareThreads", set_max_free_threads, NULL, RSRC_CONF, + "Maximum number of idle threads"), +AP_INIT_TAKE1("MaxThreads", set_thread_limit, NULL, RSRC_CONF, + "Maximum number of worker threads alive at the same time"), +{ NULL } +}; + +AP_DECLARE_MODULE(mpm_netware) = { + MPM20_MODULE_STUFF, + netware_rewrite_args, /* hook to run before apache parses args */ + NULL, /* create per-directory config structure */ + NULL, /* merge per-directory config structures */ + NULL, /* create per-server config structure */ + NULL, /* merge per-server config structures */ + netware_mpm_cmds, /* command apr_table_t */ + netware_mpm_hooks, /* register hooks */ +}; 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