From dae15c284248d49079ad5f8a3d8ff30e217f419e Mon Sep 17 00:00:00 2001 From: Dimitri Staessens Date: Thu, 25 Jul 2019 12:50:46 +0200 Subject: build: Refactor normal to unicast This completes the renaming of the normal IPCP to the unicast IPCP in the sources, to get everything consistent with the documentation. Signed-off-by: Dimitri Staessens Signed-off-by: Sander Vrijders --- src/ipcpd/normal/fa.c | 491 -------------------------------------------------- 1 file changed, 491 deletions(-) delete mode 100644 src/ipcpd/normal/fa.c (limited to 'src/ipcpd/normal/fa.c') diff --git a/src/ipcpd/normal/fa.c b/src/ipcpd/normal/fa.c deleted file mode 100644 index fbcbc6fa..00000000 --- a/src/ipcpd/normal/fa.c +++ /dev/null @@ -1,491 +0,0 @@ -/* - * Ouroboros - Copyright (C) 2016 - 2019 - * - * Flow allocator of the IPC Process - * - * Dimitri Staessens - * Sander Vrijders - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - * - * 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, write to the Free Software - * Foundation, Inc., http://www.fsf.org/about/contact/. - */ - -#if defined(__linux__) || defined(__CYGWIN__) -#define _DEFAULT_SOURCE -#else -#define _POSIX_C_SOURCE 200112L -#endif - -#include "config.h" - -#define FA "flow-allocator" -#define OUROBOROS_PREFIX FA - -#include -#include -#include -#include -#include - -#include "dir.h" -#include "fa.h" -#include "psched.h" -#include "ipcp.h" -#include "dt.h" - -#include -#include -#include - -#define TIMEOUT 10000 /* nanoseconds */ - -#define FLOW_REQ 0 -#define FLOW_REPLY 1 - -struct fa_msg { - uint64_t s_addr; - uint32_t r_eid; - uint32_t s_eid; - uint8_t code; - int8_t response; - /* QoS parameters from spec, aligned */ - uint8_t availability; - uint8_t in_order; - uint32_t delay; - uint64_t bandwidth; - uint32_t loss; - uint32_t ber; - uint32_t max_gap; -} __attribute__((packed)); - -struct cmd { - struct list_head next; - struct shm_du_buff * sdb; -}; - -struct { - pthread_rwlock_t flows_lock; - int r_eid[PROG_MAX_FLOWS]; - uint64_t r_addr[PROG_MAX_FLOWS]; - int fd; - - struct list_head cmds; - pthread_cond_t cond; - pthread_mutex_t mtx; - pthread_t worker; - - struct psched * psched; -} fa; - -static void packet_handler(int fd, - qoscube_t qc, - struct shm_du_buff * sdb) -{ - pthread_rwlock_rdlock(&fa.flows_lock); - - if (dt_write_packet(fa.r_addr[fd], qc, fa.r_eid[fd], sdb)) { - pthread_rwlock_unlock(&fa.flows_lock); - ipcp_sdb_release(sdb); - log_warn("Failed to forward packet."); - return; - } - - pthread_rwlock_unlock(&fa.flows_lock); -} - -static void destroy_conn(int fd) -{ - fa.r_eid[fd] = -1; - fa.r_addr[fd] = INVALID_ADDR; -} - -static void fa_post_packet(void * comp, - struct shm_du_buff * sdb) -{ - struct cmd * cmd; - - assert(comp == &fa); - - (void) comp; - - cmd = malloc(sizeof(*cmd)); - if (cmd == NULL) { - log_err("Command failed. Out of memory."); - ipcp_sdb_release(sdb); - return; - } - - cmd->sdb = sdb; - - pthread_mutex_lock(&fa.mtx); - - list_add(&cmd->next, &fa.cmds); - - pthread_cond_signal(&fa.cond); - - pthread_mutex_unlock(&fa.mtx); -} - -static void * fa_handle_packet(void * o) -{ - struct timespec ts = {0, TIMEOUT * 1000}; - - (void) o; - - while (true) { - struct timespec abstime; - int fd; - uint8_t * buf; - struct fa_msg * msg; - qosspec_t qs; - struct cmd * cmd; - - pthread_mutex_lock(&fa.mtx); - - pthread_cleanup_push((void (*)(void *)) pthread_mutex_unlock, - &fa.mtx); - - while (list_is_empty(&fa.cmds)) - pthread_cond_wait(&fa.cond, &fa.mtx); - - cmd = list_last_entry(&fa.cmds, struct cmd, next); - list_del(&cmd->next); - - pthread_cleanup_pop(true); - - buf = malloc(sizeof(*msg) + ipcp_dir_hash_len()); - if (buf == NULL) { - log_err("Failed to allocate memory."); - ipcp_sdb_release(cmd->sdb); - free(cmd); - continue; - } - - msg = (struct fa_msg *) buf; - - /* Depending on the message call the function in ipcp-dev.h */ - - assert(sizeof(*msg) + ipcp_dir_hash_len() >= - (unsigned long int) (shm_du_buff_tail(cmd->sdb) - - shm_du_buff_head(cmd->sdb))); - - memcpy(msg, shm_du_buff_head(cmd->sdb), - shm_du_buff_tail(cmd->sdb) - shm_du_buff_head(cmd->sdb)); - - ipcp_sdb_release(cmd->sdb); - - free(cmd); - - switch (msg->code) { - case FLOW_REQ: - clock_gettime(PTHREAD_COND_CLOCK, &abstime); - - pthread_mutex_lock(&ipcpi.alloc_lock); - - while (ipcpi.alloc_id != -1 && - ipcp_get_state() == IPCP_OPERATIONAL) { - ts_add(&abstime, &ts, &abstime); - pthread_cond_timedwait(&ipcpi.alloc_cond, - &ipcpi.alloc_lock, - &abstime); - } - - if (ipcp_get_state() != IPCP_OPERATIONAL) { - pthread_mutex_unlock(&ipcpi.alloc_lock); - log_dbg("Won't allocate over non-operational" - "IPCP."); - free(msg); - continue; - } - - assert(ipcpi.alloc_id == -1); - - qs.delay = ntoh32(msg->delay); - qs.bandwidth = ntoh64(msg->bandwidth); - qs.availability = msg->availability; - qs.loss = ntoh32(msg->loss); - qs.ber = ntoh32(msg->ber); - qs.in_order = msg->in_order; - qs.max_gap = ntoh32(msg->max_gap); - - fd = ipcp_flow_req_arr((uint8_t *) (msg + 1), - ipcp_dir_hash_len(), - qs); - if (fd < 0) { - pthread_mutex_unlock(&ipcpi.alloc_lock); - log_err("Failed to get fd for flow."); - free(msg); - continue; - } - - pthread_rwlock_wrlock(&fa.flows_lock); - - fa.r_eid[fd] = ntoh32(msg->s_eid); - fa.r_addr[fd] = ntoh64(msg->s_addr); - - pthread_rwlock_unlock(&fa.flows_lock); - - ipcpi.alloc_id = fd; - pthread_cond_broadcast(&ipcpi.alloc_cond); - - pthread_mutex_unlock(&ipcpi.alloc_lock); - - break; - case FLOW_REPLY: - pthread_rwlock_wrlock(&fa.flows_lock); - - fa.r_eid[ntoh32(msg->r_eid)] = ntoh32(msg->s_eid); - - ipcp_flow_alloc_reply(ntoh32(msg->r_eid), - msg->response); - - if (msg->response < 0) - destroy_conn(ntoh32(msg->r_eid)); - else - psched_add(fa.psched, ntoh32(msg->r_eid)); - - pthread_rwlock_unlock(&fa.flows_lock); - - break; - default: - log_err("Got an unknown flow allocation message."); - break; - } - - free(msg); - } -} - -int fa_init(void) -{ - int i; - - for (i = 0; i < PROG_MAX_FLOWS; ++i) - destroy_conn(i); - - if (pthread_rwlock_init(&fa.flows_lock, NULL)) - goto fail_rwlock; - - if (pthread_mutex_init(&fa.mtx, NULL)) - goto fail_mtx; - - if (pthread_cond_init(&fa.cond, NULL)) - goto fail_cond; - - list_head_init(&fa.cmds); - - fa.fd = dt_reg_comp(&fa, &fa_post_packet, FA); - - return 0; - - fail_cond: - pthread_mutex_destroy(&fa.mtx); - fail_mtx: - pthread_rwlock_destroy(&fa.flows_lock); - fail_rwlock: - log_err("Failed to initialize flow allocator."); - return -1; -} - -void fa_fini(void) -{ - pthread_cond_destroy(&fa.cond);; - pthread_mutex_destroy(&fa.mtx); - pthread_rwlock_destroy(&fa.flows_lock); -} - -int fa_start(void) -{ - struct sched_param par; - int pol; - int max; - - fa.psched = psched_create(packet_handler); - if (fa.psched == NULL) { - log_err("Failed to start packet scheduler."); - goto fail_psched; - } - - if (pthread_create(&fa.worker, NULL, fa_handle_packet, NULL)) { - log_err("Failed to create worker thread."); - goto fail_thread; - } - - if (pthread_getschedparam(fa.worker, &pol, &par)) { - log_err("Failed to get worker thread scheduling parameters."); - goto fail_sched; - } - - max = sched_get_priority_max(pol); - if (max < 0) { - log_err("Failed to get max priority for scheduler."); - goto fail_sched; - } - - par.sched_priority = max; - - if (pthread_setschedparam(fa.worker, pol, &par)) { - log_err("Failed to set scheduler priority to maximum."); - goto fail_sched; - } - - return 0; - - fail_sched: - pthread_cancel(fa.worker); - pthread_join(fa.worker, NULL); - fail_thread: - psched_destroy(fa.psched); - fail_psched: - log_err("Failed to start flow allocator."); - return -1; -} - -void fa_stop(void) -{ - pthread_cancel(fa.worker); - pthread_join(fa.worker, NULL); - - psched_destroy(fa.psched); -} - -int fa_alloc(int fd, - const uint8_t * dst, - qosspec_t qs) -{ - struct fa_msg * msg; - uint64_t addr; - struct shm_du_buff * sdb; - qoscube_t qc; - - addr = dir_query(dst); - if (addr == 0) - return -1; - - if (ipcp_sdb_reserve(&sdb, sizeof(*msg) + ipcp_dir_hash_len())) - return -1; - - msg = (struct fa_msg *) shm_du_buff_head(sdb); - msg->code = FLOW_REQ; - msg->s_eid = hton32(fd); - msg->s_addr = hton64(ipcpi.dt_addr); - msg->delay = hton32(qs.delay); - msg->bandwidth = hton64(qs.bandwidth); - msg->availability = qs.availability; - msg->loss = hton32(qs.loss); - msg->ber = hton32(qs.ber); - msg->in_order = qs.in_order; - msg->max_gap = hton32(qs.max_gap); - - memcpy(msg + 1, dst, ipcp_dir_hash_len()); - - qc = qos_spec_to_cube(qs); - - if (dt_write_packet(addr, qc, fa.fd, sdb)) { - ipcp_sdb_release(sdb); - return -1; - } - - pthread_rwlock_wrlock(&fa.flows_lock); - - assert(fa.r_eid[fd] == -1); - fa.r_addr[fd] = addr; - - pthread_rwlock_unlock(&fa.flows_lock); - - return 0; -} - -int fa_alloc_resp(int fd, - int response) -{ - struct timespec ts = {0, TIMEOUT * 1000}; - struct timespec abstime; - struct fa_msg * msg; - struct shm_du_buff * sdb; - qoscube_t qc; - - clock_gettime(PTHREAD_COND_CLOCK, &abstime); - - pthread_mutex_lock(&ipcpi.alloc_lock); - - while (ipcpi.alloc_id != fd && ipcp_get_state() == IPCP_OPERATIONAL) { - ts_add(&abstime, &ts, &abstime); - pthread_cond_timedwait(&ipcpi.alloc_cond, - &ipcpi.alloc_lock, - &abstime); - } - - if (ipcp_get_state() != IPCP_OPERATIONAL) { - pthread_mutex_unlock(&ipcpi.alloc_lock); - return -1; - } - - ipcpi.alloc_id = -1; - pthread_cond_broadcast(&ipcpi.alloc_cond); - - pthread_mutex_unlock(&ipcpi.alloc_lock); - - if (ipcp_sdb_reserve(&sdb, sizeof(*msg) + ipcp_dir_hash_len())) { - destroy_conn(fd); - return -1; - } - - pthread_rwlock_wrlock(&fa.flows_lock); - - msg = (struct fa_msg *) shm_du_buff_head(sdb); - msg->code = FLOW_REPLY; - msg->r_eid = hton32(fa.r_eid[fd]); - msg->s_eid = hton32(fd); - msg->response = response; - - if (response < 0) { - destroy_conn(fd); - ipcp_sdb_release(sdb); - } else { - psched_add(fa.psched, fd); - } - - ipcp_flow_get_qoscube(fd, &qc); - - assert(qc >= 0 && qc < QOS_CUBE_MAX); - - if (dt_write_packet(fa.r_addr[fd], qc, fa.fd, sdb)) { - destroy_conn(fd); - pthread_rwlock_unlock(&fa.flows_lock); - ipcp_sdb_release(sdb); - return -1; - } - - pthread_rwlock_unlock(&fa.flows_lock); - - return 0; -} - -int fa_dealloc(int fd) -{ - if (ipcp_flow_fini(fd) < 0) - return 0; - - pthread_rwlock_wrlock(&fa.flows_lock); - - psched_del(fa.psched, fd); - - destroy_conn(fd); - - pthread_rwlock_unlock(&fa.flows_lock); - - flow_dealloc(fd); - - return 0; -} -- cgit v1.2.3