From a46114ec01e8d174a41744f4f1b49905613847dc Mon Sep 17 00:00:00 2001 From: dimitri staessens Date: Mon, 20 Jun 2016 23:49:35 +0200 Subject: lib, irmd, ipcp: robust mutexes Update to POSIX 200112L to allow use of robust mutexes in the shm_du_map. Removed the implementation of the rw_lock in favor of pthread_rwlock_t. Placeholder for the shm_du_map_sanitize function. --- src/ipcpd/shim-eth-llc/main.c | 187 +++++++++++++++++++++--------------------- 1 file changed, 94 insertions(+), 93 deletions(-) (limited to 'src/ipcpd/shim-eth-llc') diff --git a/src/ipcpd/shim-eth-llc/main.c b/src/ipcpd/shim-eth-llc/main.c index 7ff59cde..9bd6920b 100644 --- a/src/ipcpd/shim-eth-llc/main.c +++ b/src/ipcpd/shim-eth-llc/main.c @@ -36,7 +36,6 @@ #include #include #include -#include #define OUROBOROS_PREFIX "ipcpd/shim-eth-llc" @@ -104,7 +103,7 @@ struct eth_llc_ipcp_data { int tx_offset; struct eth_llc_flow flows[AP_MAX_FLOWS]; - rw_lock_t flows_lock; + pthread_rwlock_t flows_lock; pthread_t mainloop; pthread_t sdu_writer; @@ -159,7 +158,7 @@ struct eth_llc_ipcp_data * eth_llc_ipcp_data_create() return NULL; } - rw_lock_init(ð_llc_data->flows_lock); + pthread_rwlock_init(ð_llc_data->flows_lock, NULL); return eth_llc_data; } @@ -171,7 +170,7 @@ void eth_llc_ipcp_data_destroy() if (_ipcp == NULL) return; - rw_lock_wrlock(&_ipcp->state_lock); + pthread_rwlock_wrlock(&_ipcp->state_lock); if (_ipcp->state != IPCP_SHUTDOWN) LOG_WARN("Cleaning up while not in shutdown."); @@ -185,14 +184,14 @@ void eth_llc_ipcp_data_destroy() if (shim_data(_ipcp)->saps != NULL) bmp_destroy(shim_data(_ipcp)->saps); - rw_lock_wrlock(&shim_data(_ipcp)->flows_lock); + pthread_rwlock_wrlock(&shim_data(_ipcp)->flows_lock); for (i = 0; i < AP_MAX_FLOWS; i ++) if (ipcp_flow(i)->rb != NULL) shm_ap_rbuff_close(ipcp_flow(i)->rb); - rw_lock_unlock(&shim_data(_ipcp)->flows_lock); - rw_lock_unlock(&_ipcp->state_lock); + pthread_rwlock_unlock(&shim_data(_ipcp)->flows_lock); + pthread_rwlock_unlock(&_ipcp->state_lock); free(_ipcp->data); } @@ -440,13 +439,13 @@ static int eth_llc_ipcp_port_req(uint8_t r_sap, ssize_t index = 0; int i; - rw_lock_wrlock(&_ipcp->state_lock); - rw_lock_wrlock(&shim_data(_ipcp)->flows_lock); + pthread_rwlock_wrlock(&_ipcp->state_lock); + pthread_rwlock_wrlock(&shim_data(_ipcp)->flows_lock); index = bmp_allocate(shim_data(_ipcp)->indices); if (index < 0) { - rw_lock_unlock(&_ipcp->state_lock); - rw_lock_unlock(&shim_data(_ipcp)->flows_lock); + pthread_rwlock_unlock(&_ipcp->state_lock); + pthread_rwlock_unlock(&shim_data(_ipcp)->flows_lock); LOG_ERR("Out of free indices."); return -1; } @@ -458,8 +457,8 @@ static int eth_llc_ipcp_port_req(uint8_t r_sap, if (port_id < 0) { bmp_release(shim_data(_ipcp)->indices, index); - rw_lock_unlock(&_ipcp->state_lock); - rw_lock_unlock(&shim_data(_ipcp)->flows_lock); + pthread_rwlock_unlock(&_ipcp->state_lock); + pthread_rwlock_unlock(&shim_data(_ipcp)->flows_lock); LOG_ERR("Could not get port id from IRMd."); return -1; } @@ -472,8 +471,8 @@ static int eth_llc_ipcp_port_req(uint8_t r_sap, shim_data(_ipcp)->flows[index].r_addr[i] = r_addr[i]; } - rw_lock_unlock(&shim_data(_ipcp)->flows_lock); - rw_lock_unlock(&_ipcp->state_lock); + pthread_rwlock_unlock(&shim_data(_ipcp)->flows_lock); + pthread_rwlock_unlock(&_ipcp->state_lock); LOG_DBG("New flow request, port_id %d, remote SAP %d.", port_id, r_sap); @@ -490,20 +489,20 @@ static int eth_llc_ipcp_port_alloc_reply(uint8_t ssap, int port_id = -1; int i; - rw_lock_rdlock(&_ipcp->state_lock); - rw_lock_rdlock(&shim_data(_ipcp)->flows_lock); + pthread_rwlock_rdlock(&_ipcp->state_lock); + pthread_rwlock_rdlock(&shim_data(_ipcp)->flows_lock); index = sap_to_index(ssap); if (index < 0) { - rw_lock_unlock(&shim_data(_ipcp)->flows_lock); - rw_lock_unlock(&_ipcp->state_lock); + pthread_rwlock_unlock(&shim_data(_ipcp)->flows_lock); + pthread_rwlock_unlock(&_ipcp->state_lock); LOG_ERR("No flow found with that SAP."); return -1; /* -EFLOWNOTFOUND */ } if (ipcp_flow(index)->state != FLOW_PENDING) { - rw_lock_unlock(&shim_data(_ipcp)->flows_lock); - rw_lock_unlock(&_ipcp->state_lock); + pthread_rwlock_unlock(&shim_data(_ipcp)->flows_lock); + pthread_rwlock_unlock(&_ipcp->state_lock); return -1; /* -EFLOWNOTPENDING */ } @@ -519,8 +518,8 @@ static int eth_llc_ipcp_port_alloc_reply(uint8_t ssap, } } - rw_lock_unlock(&shim_data(_ipcp)->flows_lock); - rw_lock_unlock(&_ipcp->state_lock); + pthread_rwlock_unlock(&shim_data(_ipcp)->flows_lock); + pthread_rwlock_unlock(&_ipcp->state_lock); LOG_DBG("Flow reply, port_id %d, remote SAP %d.", port_id, dsap); @@ -540,13 +539,13 @@ static int eth_llc_ipcp_flow_dealloc_req(uint8_t ssap, int port_id = -1; int i = 0; - rw_lock_rdlock(&_ipcp->state_lock); - rw_lock_wrlock(&shim_data(_ipcp)->flows_lock); + pthread_rwlock_rdlock(&_ipcp->state_lock); + pthread_rwlock_wrlock(&shim_data(_ipcp)->flows_lock); i = sap_to_index(ssap); if (i < 0) { - rw_lock_unlock(&shim_data(_ipcp)->flows_lock); - rw_lock_unlock(&_ipcp->state_lock); + pthread_rwlock_unlock(&shim_data(_ipcp)->flows_lock); + pthread_rwlock_unlock(&_ipcp->state_lock); LOG_ERR("No flow found for remote deallocation request."); return 0; } @@ -554,8 +553,8 @@ static int eth_llc_ipcp_flow_dealloc_req(uint8_t ssap, port_id = ipcp_flow(i)->port_id; destroy_ipcp_flow(i); - rw_lock_unlock(&shim_data(_ipcp)->flows_lock); - rw_lock_unlock(&_ipcp->state_lock); + pthread_rwlock_unlock(&shim_data(_ipcp)->flows_lock); + pthread_rwlock_unlock(&_ipcp->state_lock); ipcp_flow_dealloc(0, port_id); @@ -633,14 +632,14 @@ static void * eth_llc_ipcp_sdu_reader(void * o) memset(br_addr, 0xff, MAC_SIZE * sizeof(uint8_t)); while (true) { - rw_lock_rdlock(&_ipcp->state_lock); + pthread_rwlock_rdlock(&_ipcp->state_lock); if (_ipcp->state != IPCP_ENROLLED) { - rw_lock_unlock(&_ipcp->state_lock); + pthread_rwlock_unlock(&_ipcp->state_lock); return (void *) 1; /* -ENOTENROLLED */ } - rw_lock_unlock(&_ipcp->state_lock); + pthread_rwlock_unlock(&_ipcp->state_lock); #if defined(PACKET_RX_RING) && defined(PACKET_TX_RING) header = (void *) shim_data(_ipcp)->rx_ring + @@ -709,13 +708,13 @@ static void * eth_llc_ipcp_sdu_reader(void * o) eth_llc_ipcp_mgmt_frame((uint8_t *) (buf + i), frame_len, src_mac); } else { - rw_lock_rdlock(&_ipcp->state_lock); - rw_lock_rdlock(&shim_data(_ipcp)->flows_lock); + pthread_rwlock_rdlock(&_ipcp->state_lock); + pthread_rwlock_rdlock(&shim_data(_ipcp)->flows_lock); j = addr_and_saps_to_index(src_mac, ssap, dsap); if (j < 0) { - rw_lock_unlock(&shim_data(_ipcp)->flows_lock); - rw_lock_unlock(&_ipcp->state_lock); + pthread_rwlock_unlock(&shim_data(_ipcp)->flows_lock); + pthread_rwlock_unlock(&_ipcp->state_lock); LOG_DBG("Received data for unknown flow."); #if defined(PACKET_RX_RING) && defined(PACKET_TX_RING) offset = (offset + 1) @@ -738,8 +737,8 @@ static void * eth_llc_ipcp_sdu_reader(void * o) while (shm_ap_rbuff_write(ipcp_flow(j)->rb, &e) < 0) ; - rw_lock_unlock(&shim_data(_ipcp)->flows_lock); - rw_lock_unlock(&_ipcp->state_lock); + pthread_rwlock_unlock(&shim_data(_ipcp)->flows_lock); + pthread_rwlock_unlock(&_ipcp->state_lock); } #if defined(PACKET_RX_RING) && defined(PACKET_TX_RING) offset = (offset + 1) & (SHM_BLOCKS_IN_MAP -1); @@ -765,10 +764,10 @@ static void * eth_llc_ipcp_sdu_writer(void * o) continue; } - rw_lock_rdlock(&_ipcp->state_lock); + pthread_rwlock_rdlock(&_ipcp->state_lock); if (_ipcp->state != IPCP_ENROLLED) { - rw_lock_unlock(&_ipcp->state_lock); + pthread_rwlock_unlock(&_ipcp->state_lock); return (void *) 1; /* -ENOTENROLLED */ } @@ -776,18 +775,18 @@ static void * eth_llc_ipcp_sdu_writer(void * o) shim_data(_ipcp)->dum, e->index); if (len <= 0) { - rw_lock_unlock(&_ipcp->state_lock); + pthread_rwlock_unlock(&_ipcp->state_lock); free(e); continue; } - rw_lock_rdlock(&shim_data(_ipcp)->flows_lock); + pthread_rwlock_rdlock(&shim_data(_ipcp)->flows_lock); i = port_id_to_index(e->port_id); if (i < 0) { free(e); - rw_lock_unlock(&shim_data(_ipcp)->flows_lock); - rw_lock_unlock(&_ipcp->state_lock); + pthread_rwlock_unlock(&shim_data(_ipcp)->flows_lock); + pthread_rwlock_unlock(&_ipcp->state_lock); continue; } @@ -798,12 +797,12 @@ static void * eth_llc_ipcp_sdu_writer(void * o) dsap, ssap, buf, len)) LOG_ERR("Failed to send SDU."); - rw_lock_unlock(&shim_data(_ipcp)->flows_lock); + pthread_rwlock_unlock(&shim_data(_ipcp)->flows_lock); if (shim_data(_ipcp)->dum != NULL) shm_release_du_buff(shim_data(_ipcp)->dum, e->index); - rw_lock_unlock(&_ipcp->state_lock); + pthread_rwlock_unlock(&_ipcp->state_lock); } return (void *) 1; @@ -824,14 +823,14 @@ void ipcp_sig_handler(int sig, siginfo_t * info, void * c) LOG_DBG("Terminating by order of %d. Bye.", info->si_pid); - rw_lock_wrlock(&_ipcp->state_lock); + pthread_rwlock_wrlock(&_ipcp->state_lock); if (_ipcp->state == IPCP_ENROLLED) clean_threads = true; _ipcp->state = IPCP_SHUTDOWN; - rw_lock_unlock(&_ipcp->state_lock); + pthread_rwlock_unlock(&_ipcp->state_lock); if (clean_threads) { pthread_cancel(shim_data(_ipcp)->sdu_reader); @@ -964,10 +963,10 @@ static int eth_llc_ipcp_bootstrap(struct dif_config * conf) #endif - rw_lock_wrlock(&_ipcp->state_lock); + pthread_rwlock_wrlock(&_ipcp->state_lock); if (_ipcp->state != IPCP_INIT) { - rw_lock_unlock(&_ipcp->state_lock); + pthread_rwlock_unlock(&_ipcp->state_lock); LOG_ERR("IPCP in wrong state."); close(fd); return -1; @@ -989,7 +988,7 @@ static int eth_llc_ipcp_bootstrap(struct dif_config * conf) eth_llc_ipcp_sdu_writer, NULL); - rw_lock_unlock(&_ipcp->state_lock); + pthread_rwlock_unlock(&_ipcp->state_lock); LOG_DBG("Bootstrapped shim IPCP over Ethernet with LLC with pid %d.", getpid()); @@ -999,21 +998,21 @@ static int eth_llc_ipcp_bootstrap(struct dif_config * conf) static int eth_llc_ipcp_name_reg(char * name) { - rw_lock_rdlock(&_ipcp->state_lock); + pthread_rwlock_rdlock(&_ipcp->state_lock); if (_ipcp->state != IPCP_ENROLLED) { - rw_lock_unlock(&_ipcp->state_lock); + pthread_rwlock_unlock(&_ipcp->state_lock); LOG_DBGF("Won't register with non-enrolled IPCP."); return -1; /* -ENOTENROLLED */ } if (ipcp_data_add_reg_entry(_ipcp->data, name)) { - rw_lock_unlock(&_ipcp->state_lock); + pthread_rwlock_unlock(&_ipcp->state_lock); LOG_ERR("Failed to add %s to local registry.", name); return -1; } - rw_lock_unlock(&_ipcp->state_lock); + pthread_rwlock_unlock(&_ipcp->state_lock); LOG_DBG("Registered %s.", name); @@ -1022,11 +1021,11 @@ static int eth_llc_ipcp_name_reg(char * name) static int eth_llc_ipcp_name_unreg(char * name) { - rw_lock_rdlock(&_ipcp->state_lock); + pthread_rwlock_rdlock(&_ipcp->state_lock); ipcp_data_del_reg_entry(_ipcp->data, name); - rw_lock_unlock(&_ipcp->state_lock); + pthread_rwlock_unlock(&_ipcp->state_lock); return 0; } @@ -1054,11 +1053,11 @@ static int eth_llc_ipcp_flow_alloc(pid_t n_pid, if (rb == NULL) return -1; /* -ENORBUFF */ - rw_lock_wrlock(&_ipcp->state_lock); + pthread_rwlock_wrlock(&_ipcp->state_lock); if (_ipcp->state != IPCP_ENROLLED) { shm_ap_rbuff_close(rb); - rw_lock_unlock(&_ipcp->state_lock); + pthread_rwlock_unlock(&_ipcp->state_lock); LOG_DBGF("Won't allocate flow with non-enrolled IPCP."); return -1; /* -ENOTENROLLED */ } @@ -1066,18 +1065,18 @@ static int eth_llc_ipcp_flow_alloc(pid_t n_pid, index = bmp_allocate(shim_data(_ipcp)->indices); if (index < 0) { shm_ap_rbuff_close(rb); - rw_lock_unlock(&_ipcp->state_lock); + pthread_rwlock_unlock(&_ipcp->state_lock); return -1; } - rw_lock_wrlock(&shim_data(_ipcp)->flows_lock); + pthread_rwlock_wrlock(&shim_data(_ipcp)->flows_lock); ssap = bmp_allocate(shim_data(_ipcp)->saps); if (ssap < 0) { shm_ap_rbuff_close(rb); bmp_release(shim_data(_ipcp)->indices, index); - rw_lock_unlock(&shim_data(_ipcp)->flows_lock); - rw_lock_unlock(&_ipcp->state_lock); + pthread_rwlock_unlock(&shim_data(_ipcp)->flows_lock); + pthread_rwlock_unlock(&_ipcp->state_lock); return -1; } @@ -1086,8 +1085,8 @@ static int eth_llc_ipcp_flow_alloc(pid_t n_pid, ipcp_flow(index)->rb = rb; shim_data(_ipcp)->flows[index].sap = ssap; - rw_lock_unlock(&shim_data(_ipcp)->flows_lock); - rw_lock_unlock(&_ipcp->state_lock); + pthread_rwlock_unlock(&shim_data(_ipcp)->flows_lock); + pthread_rwlock_unlock(&_ipcp->state_lock); memset(r_addr, 0xff, MAC_SIZE * sizeof(uint8_t)); @@ -1095,11 +1094,11 @@ static int eth_llc_ipcp_flow_alloc(pid_t n_pid, dst_name, src_ae_name) < 0) { LOG_DBGF("Port alloc returned -1."); - rw_lock_wrlock(&_ipcp->state_lock); - rw_lock_wrlock(&shim_data(_ipcp)->flows_lock); + pthread_rwlock_wrlock(&_ipcp->state_lock); + pthread_rwlock_wrlock(&shim_data(_ipcp)->flows_lock); destroy_ipcp_flow(index); - rw_lock_unlock(&shim_data(_ipcp)->flows_lock); - rw_lock_unlock(&_ipcp->state_lock); + pthread_rwlock_unlock(&shim_data(_ipcp)->flows_lock); + pthread_rwlock_unlock(&_ipcp->state_lock); return -1; } @@ -1117,20 +1116,20 @@ static int eth_llc_ipcp_flow_alloc_resp(pid_t n_pid, int index = -1; uint8_t ssap = 0; - rw_lock_wrlock(&_ipcp->state_lock); - rw_lock_wrlock(&shim_data(_ipcp)->flows_lock); + pthread_rwlock_wrlock(&_ipcp->state_lock); + pthread_rwlock_wrlock(&shim_data(_ipcp)->flows_lock); index = port_id_to_index(port_id); if (index < 0) { - rw_lock_unlock(&shim_data(_ipcp)->flows_lock); - rw_lock_unlock(&_ipcp->state_lock); + pthread_rwlock_unlock(&shim_data(_ipcp)->flows_lock); + pthread_rwlock_unlock(&_ipcp->state_lock); LOG_DBGF("Could not find flow with port_id %d.", port_id); return -1; } if (ipcp_flow(index)->state != FLOW_PENDING) { - rw_lock_unlock(&shim_data(_ipcp)->flows_lock); - rw_lock_unlock(&_ipcp->state_lock); + pthread_rwlock_unlock(&shim_data(_ipcp)->flows_lock); + pthread_rwlock_unlock(&_ipcp->state_lock); LOG_DBGF("Flow was not pending."); return -1; } @@ -1141,8 +1140,8 @@ static int eth_llc_ipcp_flow_alloc_resp(pid_t n_pid, ipcp_flow(index)->state = FLOW_NULL; ipcp_flow(index)->port_id = -1; bmp_release(shim_data(_ipcp)->indices, index); - rw_lock_unlock(&shim_data(_ipcp)->flows_lock); - rw_lock_unlock(&_ipcp->state_lock); + pthread_rwlock_unlock(&shim_data(_ipcp)->flows_lock); + pthread_rwlock_unlock(&_ipcp->state_lock); return -1; } @@ -1152,8 +1151,8 @@ static int eth_llc_ipcp_flow_alloc_resp(pid_t n_pid, ipcp_flow(index)->port_id = -1; shm_ap_rbuff_close(ipcp_flow(index)->rb); bmp_release(shim_data(_ipcp)->indices, index); - rw_lock_unlock(&shim_data(_ipcp)->flows_lock); - rw_lock_unlock(&_ipcp->state_lock); + pthread_rwlock_unlock(&shim_data(_ipcp)->flows_lock); + pthread_rwlock_unlock(&_ipcp->state_lock); return -1; } @@ -1161,18 +1160,18 @@ static int eth_llc_ipcp_flow_alloc_resp(pid_t n_pid, ipcp_flow(index)->rb = rb; shim_data(_ipcp)->flows[index].sap = ssap; - rw_lock_unlock(&shim_data(_ipcp)->flows_lock); - rw_lock_unlock(&_ipcp->state_lock); + pthread_rwlock_unlock(&shim_data(_ipcp)->flows_lock); + pthread_rwlock_unlock(&_ipcp->state_lock); if (eth_llc_ipcp_port_alloc_resp(shim_data(_ipcp)->flows[index].r_addr, shim_data(_ipcp)->flows[index].r_sap, ssap, response) < 0) { - rw_lock_rdlock(&_ipcp->state_lock); - rw_lock_wrlock(&shim_data(_ipcp)->flows_lock); + pthread_rwlock_rdlock(&_ipcp->state_lock); + pthread_rwlock_wrlock(&shim_data(_ipcp)->flows_lock); destroy_ipcp_flow(index); - rw_lock_unlock(&shim_data(_ipcp)->flows_lock); - rw_lock_unlock(&_ipcp->state_lock); + pthread_rwlock_unlock(&shim_data(_ipcp)->flows_lock); + pthread_rwlock_unlock(&_ipcp->state_lock); LOG_DBGF("Could not send response."); return -1; @@ -1191,13 +1190,13 @@ static int eth_llc_ipcp_flow_dealloc(int port_id) int i; int ret; - rw_lock_rdlock(&_ipcp->state_lock); - rw_lock_wrlock(&shim_data(_ipcp)->flows_lock); + pthread_rwlock_rdlock(&_ipcp->state_lock); + pthread_rwlock_wrlock(&shim_data(_ipcp)->flows_lock); index = port_id_to_index(port_id); if (index < 0) { - rw_lock_unlock(&shim_data(_ipcp)->flows_lock); - rw_lock_unlock(&_ipcp->state_lock); + pthread_rwlock_unlock(&shim_data(_ipcp)->flows_lock); + pthread_rwlock_unlock(&_ipcp->state_lock); return 0; } @@ -1208,10 +1207,12 @@ static int eth_llc_ipcp_flow_dealloc(int port_id) destroy_ipcp_flow(index); - rw_lock_unlock(&shim_data(_ipcp)->flows_lock); + pthread_rwlock_unlock(&shim_data(_ipcp)->flows_lock); ret = eth_llc_ipcp_port_dealloc(addr, sap); - rw_lock_unlock(&_ipcp->state_lock); + pthread_rwlock_unlock(&_ipcp->state_lock); + if (eth_llc_ipcp_port_dealloc(addr, sap) < 0) + LOG_DBGF("Could not notify remote."); if (ret < 0) LOG_DBGF("Could not notify remote."); @@ -1289,7 +1290,7 @@ int main(int argc, char * argv[]) _ipcp->ops = ð_llc_ops; _ipcp->state = IPCP_INIT; - rw_lock_wrlock(&_ipcp->state_lock); + pthread_rwlock_wrlock(&_ipcp->state_lock); pthread_sigmask(SIG_BLOCK, &sigset, NULL); @@ -1298,7 +1299,7 @@ int main(int argc, char * argv[]) pthread_sigmask(SIG_UNBLOCK, &sigset, NULL); - rw_lock_unlock(&_ipcp->state_lock); + pthread_rwlock_unlock(&_ipcp->state_lock); pthread_join(shim_data(_ipcp)->mainloop, NULL); -- cgit v1.2.3