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-rw-r--r--src/lib/CMakeLists.txt3
-rw-r--r--src/lib/dev.c500
-rw-r--r--src/lib/lockfile.c39
-rw-r--r--src/lib/shm_ap_rbuff.c661
-rw-r--r--src/lib/shm_flow_set.c407
-rw-r--r--src/lib/shm_rbuff.c405
-rw-r--r--src/lib/shm_rdrbuff.c29
7 files changed, 1165 insertions, 879 deletions
diff --git a/src/lib/CMakeLists.txt b/src/lib/CMakeLists.txt
index b94d0eea..20ea473d 100644
--- a/src/lib/CMakeLists.txt
+++ b/src/lib/CMakeLists.txt
@@ -35,7 +35,8 @@ set(SOURCE_FILES
lockfile.c
logs.c
nsm.c
- shm_ap_rbuff.c
+ shm_flow_set.c
+ shm_rbuff.c
shm_rdrbuff.c
sockets.c
time_utils.c
diff --git a/src/lib/dev.c b/src/lib/dev.c
index 77c2d06a..146070b7 100644
--- a/src/lib/dev.c
+++ b/src/lib/dev.c
@@ -3,7 +3,8 @@
*
* API for applications
*
- * Sander Vrijders <sander.vrijders@intec.ugent.be>
+ * Dimitri Staessens <dimitri.staessens@intec.ugent.be>
+ * Sander Vrijders <sander.vrijders@intec.ugent.be>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
@@ -26,20 +27,24 @@
#include <ouroboros/sockets.h>
#include <ouroboros/fcntl.h>
#include <ouroboros/bitmap.h>
+#include <ouroboros/shm_flow_set.h>
#include <ouroboros/shm_rdrbuff.h>
-#include <ouroboros/shm_ap_rbuff.h>
+#include <ouroboros/shm_rbuff.h>
#include <ouroboros/utils.h>
-#include <ouroboros/select.h>
+#include <ouroboros/fqueue.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
struct flow_set {
- bool dirty;
- bool b[IRMD_MAX_FLOWS]; /* working copy */
- bool s[IRMD_MAX_FLOWS]; /* safe copy */
- pthread_rwlock_t lock;
+ size_t idx;
+};
+
+struct fqueue {
+ int fqueue[SHM_BUFFER_SIZE]; /* safe copy from shm */
+ size_t fqsize;
+ size_t next;
};
enum port_state {
@@ -124,7 +129,9 @@ enum port_state port_wait_assign(struct port * p)
}
struct flow {
- struct shm_ap_rbuff * rb;
+ struct shm_rbuff * rx_rb;
+ struct shm_rbuff * tx_rb;
+ struct shm_flow_set * set;
int port_id;
int oflags;
@@ -139,10 +146,11 @@ struct {
pid_t api;
struct shm_rdrbuff * rdrb;
- struct shm_ap_rbuff * rb;
+ struct shm_flow_set * fqset;
pthread_rwlock_t data_lock;
struct bmp * fds;
+ struct bmp * fqueues;
struct flow * flows;
struct port * ports;
@@ -194,40 +202,52 @@ int ap_init(char * ap_name)
if (ai.fds == NULL)
return -ENOMEM;
- ai.rdrb = shm_rdrbuff_open();
- if (ai.rdrb == NULL) {
+ ai.fqueues = bmp_create(AP_MAX_FQUEUES, 0);
+ if (ai.fqueues == NULL) {
+ bmp_destroy(ai.fds);
+ return -ENOMEM;
+ }
+
+ ai.fqset = shm_flow_set_create();
+ if (ai.fqset == NULL) {
+ bmp_destroy(ai.fqueues);
bmp_destroy(ai.fds);
return -1;
}
- ai.rb = shm_ap_rbuff_create();
- if (ai.rb == NULL) {
- shm_rdrbuff_close(ai.rdrb);
+ ai.rdrb = shm_rdrbuff_open();
+ if (ai.rdrb == NULL) {
+ shm_flow_set_destroy(ai.fqset);
+ bmp_destroy(ai.fqueues);
bmp_destroy(ai.fds);
return -1;
}
ai.flows = malloc(sizeof(*ai.flows) * AP_MAX_FLOWS);
if (ai.flows == NULL) {
- shm_ap_rbuff_destroy(ai.rb);
shm_rdrbuff_close(ai.rdrb);
+ shm_flow_set_destroy(ai.fqset);
+ bmp_destroy(ai.fqueues);
bmp_destroy(ai.fds);
return -1;
}
for (i = 0; i < AP_MAX_FLOWS; ++i) {
- ai.flows[i].rb = NULL;
+ ai.flows[i].rx_rb = NULL;
+ ai.flows[i].tx_rb = NULL;
+ ai.flows[i].set = NULL;
ai.flows[i].port_id = -1;
- ai.flows[i].oflags = 0;
- ai.flows[i].api = -1;
+ ai.flows[i].oflags = 0;
+ ai.flows[i].api = -1;
ai.flows[i].timeout = NULL;
}
ai.ports = malloc(sizeof(*ai.ports) * IRMD_MAX_FLOWS);
- if (ai.flows == NULL) {
+ if (ai.ports == NULL) {
free(ai.flows);
- shm_ap_rbuff_destroy(ai.rb);
shm_rdrbuff_close(ai.rdrb);
+ shm_flow_set_destroy(ai.fqset);
+ bmp_destroy(ai.fqueues);
bmp_destroy(ai.fds);
return -1;
}
@@ -253,16 +273,10 @@ void ap_fini()
pthread_rwlock_wrlock(&ai.data_lock);
- /* remove all remaining sdus */
- while ((i = shm_ap_rbuff_pop_idx(ai.rb)) >= 0)
- shm_rdrbuff_remove(ai.rdrb, i);
-
- if (ai.fds != NULL)
- bmp_destroy(ai.fds);
- if (ai.rb != NULL)
- shm_ap_rbuff_destroy(ai.rb);
- if (ai.rdrb != NULL)
- shm_rdrbuff_close(ai.rdrb);
+ bmp_destroy(ai.fds);
+ bmp_destroy(ai.fqueues);
+ shm_flow_set_destroy(ai.fqset);
+ shm_rdrbuff_close(ai.rdrb);
if (ai.daf_name != NULL)
free(ai.daf_name);
@@ -270,8 +284,15 @@ void ap_fini()
pthread_rwlock_rdlock(&ai.flows_lock);
for (i = 0; i < AP_MAX_FLOWS; ++i) {
- if (ai.flows[i].rb != NULL)
- shm_ap_rbuff_close(ai.flows[i].rb);
+ if (ai.flows[i].tx_rb != NULL) {
+ int idx;
+ while ((idx = shm_rbuff_read(ai.flows[i].rx_rb)) >= 0)
+ shm_rdrbuff_remove(ai.rdrb, idx);
+ shm_rbuff_close(ai.flows[i].rx_rb);
+ shm_rbuff_close(ai.flows[i].tx_rb);
+ shm_flow_set_close(ai.flows[i].set);
+ }
+
if (ai.flows[i].timeout != NULL)
free(ai.flows[i].timeout);
}
@@ -328,8 +349,8 @@ int flow_accept(char ** ae_name)
return -1;
}
- ai.flows[fd].rb = shm_ap_rbuff_open(recv_msg->api);
- if (ai.flows[fd].rb == NULL) {
+ ai.flows[fd].rx_rb = shm_rbuff_open(ai.api, recv_msg->port_id);
+ if (ai.flows[fd].rx_rb == NULL) {
bmp_release(ai.fds, fd);
pthread_rwlock_unlock(&ai.flows_lock);
pthread_rwlock_unlock(&ai.data_lock);
@@ -337,10 +358,24 @@ int flow_accept(char ** ae_name)
return -1;
}
+ ai.flows[fd].set = shm_flow_set_open(recv_msg->api);
+ if (ai.flows[fd].set == NULL) {
+ bmp_release(ai.fds, fd);
+ shm_rbuff_close(ai.flows[fd].rx_rb);
+ shm_rbuff_close(ai.flows[fd].tx_rb);
+ pthread_rwlock_unlock(&ai.flows_lock);
+ pthread_rwlock_unlock(&ai.data_lock);
+ irm_msg__free_unpacked(recv_msg, NULL);
+ return -1;
+ }
+
+
if (ae_name != NULL) {
*ae_name = strdup(recv_msg->ae_name);
if (*ae_name == NULL) {
- shm_ap_rbuff_close(ai.flows[fd].rb);
+ shm_rbuff_close(ai.flows[fd].tx_rb);
+ shm_rbuff_close(ai.flows[fd].tx_rb);
+ shm_flow_set_close(ai.flows[fd].set);
bmp_release(ai.fds, fd);
pthread_rwlock_unlock(&ai.flows_lock);
pthread_rwlock_unlock(&ai.data_lock);
@@ -356,8 +391,6 @@ int flow_accept(char ** ae_name)
ai.ports[recv_msg->port_id].fd = fd;
ai.ports[recv_msg->port_id].state = PORT_ID_ASSIGNED;
- shm_ap_rbuff_open_port(ai.rb, recv_msg->port_id);
-
pthread_rwlock_unlock(&ai.flows_lock);
pthread_rwlock_unlock(&ai.data_lock);
@@ -410,6 +443,17 @@ int flow_alloc_resp(int fd, int response)
ret = recv_msg->result;
+ pthread_rwlock_wrlock(&ai.flows_lock);
+
+ ai.flows[fd].tx_rb = shm_rbuff_open(ai.flows[fd].api,
+ ai.flows[fd].port_id);
+ if (ai.flows[fd].tx_rb == NULL) {
+ pthread_rwlock_unlock(&ai.flows_lock);
+ pthread_rwlock_unlock(&ai.data_lock);
+ return -1;
+ }
+
+ pthread_rwlock_unlock(&ai.flows_lock);
pthread_rwlock_unlock(&ai.data_lock);
irm_msg__free_unpacked(recv_msg, NULL);
@@ -461,8 +505,11 @@ int flow_alloc(char * dst_name, char * src_ae_name, struct qos_spec * qos)
return -1;
}
- ai.flows[fd].rb = shm_ap_rbuff_open(recv_msg->api);
- if (ai.flows[fd].rb == NULL) {
+ ai.flows[fd].port_id = recv_msg->port_id;
+ ai.flows[fd].oflags = FLOW_O_DEFAULT;
+ ai.flows[fd].api = recv_msg->api;
+ ai.flows[fd].rx_rb = shm_rbuff_open(ai.api, recv_msg->port_id);
+ if (ai.flows[fd].rx_rb == NULL) {
bmp_release(ai.fds, fd);
pthread_rwlock_unlock(&ai.flows_lock);
pthread_rwlock_unlock(&ai.data_lock);
@@ -470,18 +517,12 @@ int flow_alloc(char * dst_name, char * src_ae_name, struct qos_spec * qos)
return -1;
}
- ai.flows[fd].port_id = recv_msg->port_id;
- ai.flows[fd].oflags = FLOW_O_DEFAULT;
- ai.flows[fd].api = recv_msg->api;
-
ai.ports[recv_msg->port_id].fd = fd;
ai.ports[recv_msg->port_id].state = PORT_ID_ASSIGNED;
pthread_rwlock_unlock(&ai.flows_lock);
pthread_rwlock_unlock(&ai.data_lock);
- shm_ap_rbuff_open_port(ai.rb, recv_msg->port_id);
-
irm_msg__free_unpacked(recv_msg, NULL);
return fd;
@@ -510,6 +551,23 @@ int flow_alloc_res(int fd)
msg.port_id = ai.flows[fd].port_id;
+ ai.flows[fd].tx_rb = shm_rbuff_open(ai.flows[fd].api,
+ ai.flows[fd].port_id);
+ if (ai.flows[fd].tx_rb == NULL) {
+ pthread_rwlock_unlock(&ai.flows_lock);
+ pthread_rwlock_unlock(&ai.data_lock);
+ irm_msg__free_unpacked(recv_msg, NULL);
+ return -1;
+ }
+
+ ai.flows[fd].set = shm_flow_set_open(ai.flows[fd].api);
+ if (ai.flows[fd].set == NULL) {
+ pthread_rwlock_unlock(&ai.flows_lock);
+ pthread_rwlock_unlock(&ai.data_lock);
+ irm_msg__free_unpacked(recv_msg, NULL);
+ return -1;
+ }
+
pthread_rwlock_unlock(&ai.flows_lock);
pthread_rwlock_unlock(&ai.data_lock);
@@ -537,7 +595,7 @@ int flow_dealloc(int fd)
msg.code = IRM_MSG_CODE__IRM_FLOW_DEALLOC;
msg.has_port_id = true;
msg.has_api = true;
- msg.api = getpid();
+ msg.api = ai.api;
pthread_rwlock_rdlock(&ai.data_lock);
pthread_rwlock_wrlock(&ai.flows_lock);
@@ -548,7 +606,7 @@ int flow_dealloc(int fd)
return -ENOTALLOC;
}
- if (shm_ap_rbuff_close_port(ai.rb, ai.flows[fd].port_id) == -EBUSY) {
+ if (shm_rbuff_block(ai.flows[fd].rx_rb) == -EBUSY) {
pthread_rwlock_unlock(&ai.flows_lock);
pthread_rwlock_unlock(&ai.data_lock);
return -EBUSY;
@@ -559,8 +617,10 @@ int flow_dealloc(int fd)
port_destroy(&ai.ports[msg.port_id]);
ai.flows[fd].port_id = -1;
- shm_ap_rbuff_close(ai.flows[fd].rb);
- ai.flows[fd].rb = NULL;
+ shm_rbuff_close(ai.flows[fd].rx_rb);
+ ai.flows[fd].rx_rb = NULL;
+ shm_rbuff_close(ai.flows[fd].tx_rb);
+ ai.flows[fd].tx_rb = NULL;
ai.flows[fd].oflags = 0;
ai.flows[fd].api = -1;
if (ai.flows[fd].timeout != NULL) {
@@ -604,9 +664,9 @@ int flow_cntl(int fd, int cmd, int oflags)
case FLOW_F_SETFL: /* SET FLOW FLAGS */
ai.flows[fd].oflags = oflags;
if (oflags & FLOW_O_WRONLY)
- shm_ap_rbuff_close_port(ai.rb, ai.flows[fd].port_id);
+ shm_rbuff_block(ai.flows[fd].rx_rb);
if (oflags & FLOW_O_RDWR)
- shm_ap_rbuff_open_port(ai.rb, ai.flows[fd].port_id);
+ shm_rbuff_unblock(ai.flows[fd].rx_rb);
pthread_rwlock_unlock(&ai.flows_lock);
pthread_rwlock_unlock(&ai.data_lock);
return old;
@@ -620,7 +680,6 @@ int flow_cntl(int fd, int cmd, int oflags)
ssize_t flow_write(int fd, void * buf, size_t count)
{
ssize_t idx;
- struct rb_entry e;
if (buf == NULL)
return 0;
@@ -653,13 +712,10 @@ ssize_t flow_write(int fd, void * buf, size_t count)
if (idx < 0) {
pthread_rwlock_unlock(&ai.flows_lock);
pthread_rwlock_unlock(&ai.data_lock);
- return -idx;
+ return idx;
}
- e.index = idx;
- e.port_id = ai.flows[fd].port_id;
-
- if (shm_ap_rbuff_write(ai.flows[fd].rb, &e) < 0) {
+ if (shm_rbuff_write(ai.flows[fd].tx_rb, idx) < 0) {
shm_rdrbuff_remove(ai.rdrb, idx);
pthread_rwlock_unlock(&ai.flows_lock);
pthread_rwlock_unlock(&ai.data_lock);
@@ -667,7 +723,7 @@ ssize_t flow_write(int fd, void * buf, size_t count)
}
} else { /* blocking */
struct shm_rdrbuff * rdrb = ai.rdrb;
- pid_t api = ai.flows[fd].api;
+ pid_t api = ai.flows[fd].api;
pthread_rwlock_unlock(&ai.flows_lock);
pthread_rwlock_unlock(&ai.data_lock);
@@ -681,17 +737,16 @@ ssize_t flow_write(int fd, void * buf, size_t count)
pthread_rwlock_rdlock(&ai.data_lock);
pthread_rwlock_rdlock(&ai.flows_lock);
- e.index = idx;
- e.port_id = ai.flows[fd].port_id;
-
- if (shm_ap_rbuff_write(ai.flows[fd].rb, &e) < 0) {
- shm_rdrbuff_remove(ai.rdrb, e.index);
+ if (shm_rbuff_write(ai.flows[fd].tx_rb, idx) < 0) {
+ shm_rdrbuff_remove(ai.rdrb, idx);
pthread_rwlock_unlock(&ai.flows_lock);
pthread_rwlock_unlock(&ai.data_lock);
return -ENOTALLOC;
}
}
+ shm_flow_set_notify(ai.flows[fd].set, ai.flows[fd].port_id);
+
pthread_rwlock_unlock(&ai.flows_lock);
pthread_rwlock_unlock(&ai.data_lock);
@@ -717,15 +772,14 @@ ssize_t flow_read(int fd, void * buf, size_t count)
}
if (ai.flows[fd].oflags & FLOW_O_NONBLOCK) {
- idx = shm_ap_rbuff_read_port(ai.rb, ai.flows[fd].port_id);
+ idx = shm_rbuff_read(ai.flows[fd].rx_rb);
pthread_rwlock_unlock(&ai.flows_lock);
} else {
- struct shm_ap_rbuff * rb = ai.rb;
- int port_id = ai.flows[fd].port_id;
- struct timespec * timeout = ai.flows[fd].timeout;
+ struct shm_rbuff * rb = ai.flows[fd].rx_rb;
+ struct timespec * timeout = ai.flows[fd].timeout;
pthread_rwlock_unlock(&ai.flows_lock);
pthread_rwlock_unlock(&ai.data_lock);
- idx = shm_ap_rbuff_read_port_b(rb, port_id, timeout);
+ idx = shm_rbuff_read_b(rb, timeout);
pthread_rwlock_rdlock(&ai.data_lock);
}
@@ -757,79 +811,163 @@ struct flow_set * flow_set_create()
if (set == NULL)
return NULL;
- if (pthread_rwlock_init(&set->lock, NULL)) {
+ assert(ai.fqueues);
+
+ set->idx = bmp_allocate(ai.fqueues);
+ if (!bmp_is_id_valid(ai.fqueues, set->idx)) {
free(set);
return NULL;
}
- memset(set->b, 0, IRMD_MAX_FLOWS);
- memset(set->s, 0, IRMD_MAX_FLOWS);
+ return set;
+}
- set->dirty = true;
+void flow_set_destroy(struct flow_set * set)
+{
+ if (set == NULL)
+ return;
- return set;
+ flow_set_zero(set);
+ bmp_release(ai.fqueues, set->idx);
+ free(set);
}
-void flow_set_zero(struct flow_set * set)
+struct fqueue * fqueue_create()
{
- pthread_rwlock_wrlock(&set->lock);
- memset(set->b, 0, IRMD_MAX_FLOWS);
- set->dirty = true;
- pthread_rwlock_unlock(&set->lock);
+ struct fqueue * fq = malloc(sizeof(*fq));
+ if (fq == NULL)
+ return NULL;
+
+ memset(fq->fqueue, -1, SHM_BUFFER_SIZE);
+ fq->fqsize = 0;
+ fq->next = 0;
+
+ return fq;
}
-void flow_set_add(struct flow_set * set, int fd)
+void fqueue_destroy(struct fqueue * fq)
{
- pthread_rwlock_wrlock(&set->lock);
- set->b[ai.flows[fd].port_id] = true;
- set->dirty = true;
- pthread_rwlock_unlock(&set->lock);
+ if (fq == NULL)
+ return
+ free(fq);
}
-void flow_set_del(struct flow_set * set, int fd)
+void flow_set_zero(struct flow_set * set)
{
- pthread_rwlock_wrlock(&set->lock);
- set->b[ai.flows[fd].port_id] = false;
- set->dirty = true;
- pthread_rwlock_unlock(&set->lock);
+ if (set == NULL)
+ return;
+
+ pthread_rwlock_rdlock(&ai.data_lock);
+
+ shm_flow_set_zero(ai.fqset, set->idx);
+
+ pthread_rwlock_unlock(&ai.data_lock);
}
-bool flow_set_has(struct flow_set * set, int fd)
+int flow_set_add(struct flow_set * set, int fd)
{
- bool ret;
- pthread_rwlock_rdlock(&set->lock);
- ret = set->b[ai.flows[fd].port_id];
- pthread_rwlock_unlock(&set->lock);
+ int ret;
+
+ if (set == NULL)
+ return -EINVAL;
+
+ pthread_rwlock_rdlock(&ai.data_lock);
+ pthread_rwlock_rdlock(&ai.flows_lock);
+
+ ret = shm_flow_set_add(ai.fqset, set->idx, ai.flows[fd].port_id);
+
+ pthread_rwlock_unlock(&ai.flows_lock);
+ pthread_rwlock_unlock(&ai.data_lock);
+
return ret;
}
-void flow_set_destroy(struct flow_set * set)
+void flow_set_del(struct flow_set * set, int fd)
{
- pthread_rwlock_destroy(&set->lock);
- free(set);
+ if (set == NULL)
+ return;
+
+ pthread_rwlock_rdlock(&ai.data_lock);
+ pthread_rwlock_rdlock(&ai.flows_lock);
+
+ if (ai.flows[fd].port_id >= 0)
+ shm_flow_set_del(ai.fqset, set->idx, ai.flows[fd].port_id);
+
+ pthread_rwlock_unlock(&ai.flows_lock);
+ pthread_rwlock_unlock(&ai.data_lock);
}
-static void flow_set_cpy(struct flow_set * set)
+bool flow_set_has(struct flow_set * set, int fd)
{
- pthread_rwlock_rdlock(&set->lock);
- if (set->dirty)
- memcpy(set->s, set->b, IRMD_MAX_FLOWS);
- set->dirty = false;
- pthread_rwlock_unlock(&set->lock);
+ bool ret = false;
+
+ if (set == NULL || fd < 0)
+ return false;
+
+ pthread_rwlock_rdlock(&ai.data_lock);
+ pthread_rwlock_rdlock(&ai.flows_lock);
+
+ if (ai.flows[fd].port_id < 0) {
+ pthread_rwlock_unlock(&ai.flows_lock);
+ pthread_rwlock_unlock(&ai.data_lock);
+ return false;
+ }
+
+ ret = (shm_flow_set_has(ai.fqset, set->idx, ai.flows[fd].port_id) == 1);
+
+ pthread_rwlock_unlock(&ai.flows_lock);
+ pthread_rwlock_unlock(&ai.data_lock);
+
+ return ret;
}
-int flow_select(struct flow_set * set, const struct timespec * timeout)
+int fqueue_next(struct fqueue * fq)
{
- int port_id;
- if (set == NULL) {
- port_id = shm_ap_rbuff_peek_b(ai.rb, NULL, timeout);
- } else {
- flow_set_cpy(set);
- port_id = shm_ap_rbuff_peek_b(ai.rb, (bool *) set->s, timeout);
+ int fd;
+
+ if (fq == NULL)
+ return -EINVAL;
+
+ if (fq->next == fq->fqsize) {
+ fq->fqsize = 0;
+ fq->next = 0;
+ return -EPERM;
}
- if (port_id < 0)
- return port_id;
- return ai.ports[port_id].fd;
+
+ pthread_rwlock_rdlock(&ai.data_lock);
+ pthread_rwlock_rdlock(&ai.flows_lock);
+
+ fd = ai.ports[fq->fqueue[fq->next++]].fd;
+
+ pthread_rwlock_unlock(&ai.flows_lock);
+ pthread_rwlock_unlock(&ai.data_lock);
+
+ return fd;
+}
+
+int flow_event_wait(struct flow_set * set,
+ struct fqueue * fq,
+ const struct timespec * timeout)
+{
+ int ret;
+
+ if (set == NULL)
+ return -EINVAL;
+
+ if (fq->fqsize > 0)
+ return 0;
+
+ ret = shm_flow_set_wait(ai.fqset, set->idx, fq->fqueue, timeout);
+ if (ret == -ETIMEDOUT)
+ return -ETIMEDOUT;
+
+ if (ret < 0)
+ return ret;
+
+ fq->fqsize = ret;
+ fq->next = 0;
+
+ return 0;
}
/* ipcp-dev functions */
@@ -848,8 +986,8 @@ int np1_flow_alloc(pid_t n_api, int port_id)
return -1;
}
- ai.flows[fd].rb = shm_ap_rbuff_open(n_api);
- if (ai.flows[fd].rb == NULL) {
+ ai.flows[fd].rx_rb = shm_rbuff_open(ai.api, port_id);
+ if (ai.flows[fd].rx_rb == NULL) {
bmp_release(ai.fds, fd);
pthread_rwlock_unlock(&ai.flows_lock);
pthread_rwlock_unlock(&ai.data_lock);
@@ -863,8 +1001,6 @@ int np1_flow_alloc(pid_t n_api, int port_id)
ai.ports[port_id].fd = fd;
port_set_state(&ai.ports[port_id], PORT_ID_ASSIGNED);
- shm_ap_rbuff_open_port(ai.rb, port_id);
-
pthread_rwlock_unlock(&ai.flows_lock);
pthread_rwlock_unlock(&ai.data_lock);
@@ -890,7 +1026,6 @@ int np1_flow_dealloc(int port_id)
int np1_flow_resp(pid_t n_api, int port_id)
{
int fd;
- struct shm_ap_rbuff * rb;
port_wait_assign(&ai.ports[port_id]);
@@ -904,18 +1039,26 @@ int np1_flow_resp(pid_t n_api, int port_id)
return fd;
}
- rb = shm_ap_rbuff_open(n_api);
- if (rb == NULL) {
+ ai.flows[fd].tx_rb = shm_rbuff_open(n_api, port_id);
+ if (ai.flows[fd].tx_rb == NULL) {
ai.flows[fd].port_id = -1;
+ shm_rbuff_close(ai.flows[fd].rx_rb);
port_destroy(&ai.ports[port_id]);
pthread_rwlock_unlock(&ai.flows_lock);
pthread_rwlock_unlock(&ai.data_lock);
return -1;
}
- ai.flows[fd].rb = rb;
-
- shm_ap_rbuff_open_port(ai.rb, port_id);
+ ai.flows[fd].set = shm_flow_set_open(n_api);
+ if (ai.flows[fd].set == NULL) {
+ shm_rbuff_close(ai.flows[fd].tx_rb);
+ ai.flows[fd].port_id = -1;
+ shm_rbuff_close(ai.flows[fd].rx_rb);
+ port_destroy(&ai.ports[port_id]);
+ pthread_rwlock_unlock(&ai.flows_lock);
+ pthread_rwlock_unlock(&ai.data_lock);
+ return -1;
+ }
pthread_rwlock_unlock(&ai.flows_lock);
pthread_rwlock_unlock(&ai.data_lock);
@@ -929,9 +1072,9 @@ int ipcp_create_r(pid_t api)
irm_msg_t * recv_msg = NULL;
int ret = -1;
- msg.code = IRM_MSG_CODE__IPCP_CREATE_R;
- msg.has_api = true;
- msg.api = api;
+ msg.code = IRM_MSG_CODE__IPCP_CREATE_R;
+ msg.has_api = true;
+ msg.api = api;
recv_msg = send_recv_irm_msg(&msg);
if (recv_msg == NULL)
@@ -958,11 +1101,11 @@ int ipcp_flow_req_arr(pid_t api, char * dst_name, char * src_ae_name)
if (dst_name == NULL || src_ae_name == NULL)
return -EINVAL;
- msg.code = IRM_MSG_CODE__IPCP_FLOW_REQ_ARR;
- msg.has_api = true;
- msg.api = api;
- msg.dst_name = dst_name;
- msg.ae_name = src_ae_name;
+ msg.code = IRM_MSG_CODE__IPCP_FLOW_REQ_ARR;
+ msg.has_api = true;
+ msg.api = api;
+ msg.dst_name = dst_name;
+ msg.ae_name = src_ae_name;
pthread_rwlock_rdlock(&ai.data_lock);
pthread_rwlock_wrlock(&ai.flows_lock);
@@ -974,7 +1117,7 @@ int ipcp_flow_req_arr(pid_t api, char * dst_name, char * src_ae_name)
return -1; /* -ENOMOREFDS */
}
- ai.flows[fd].rb = NULL;
+ ai.flows[fd].tx_rb = NULL;
pthread_rwlock_unlock(&ai.flows_lock);
pthread_rwlock_unlock(&ai.data_lock);
@@ -996,8 +1139,16 @@ int ipcp_flow_req_arr(pid_t api, char * dst_name, char * src_ae_name)
pthread_rwlock_rdlock(&ai.data_lock);
pthread_rwlock_wrlock(&ai.flows_lock);
+ ai.flows[fd].rx_rb = shm_rbuff_open(ai.api, port_id);
+ if (ai.flows[fd].rx_rb == NULL) {
+ ai.flows[fd].port_id = -1;
+ port_destroy(&ai.ports[port_id]);
+ pthread_rwlock_unlock(&ai.flows_lock);
+ pthread_rwlock_unlock(&ai.data_lock);
+ return -1;
+ }
+
ai.flows[fd].port_id = port_id;
- ai.flows[fd].rb = NULL;
ai.ports[port_id].fd = fd;
port_set_state(&(ai.ports[port_id]), PORT_ID_ASSIGNED);
@@ -1019,16 +1170,13 @@ int ipcp_flow_alloc_reply(int fd, int response)
pthread_rwlock_rdlock(&ai.data_lock);
pthread_rwlock_rdlock(&ai.flows_lock);
- msg.port_id = ai.flows[fd].port_id;
+ msg.port_id = ai.flows[fd].port_id;
pthread_rwlock_unlock(&ai.flows_lock);
pthread_rwlock_unlock(&ai.data_lock);
msg.has_response = true;
msg.response = response;
- if (response)
- shm_ap_rbuff_open_port(ai.rb, msg.port_id);
-
recv_msg = send_recv_irm_msg(&msg);
if (recv_msg == NULL)
return -1;
@@ -1039,6 +1187,26 @@ int ipcp_flow_alloc_reply(int fd, int response)
}
ret = recv_msg->result;
+
+ pthread_rwlock_wrlock(&ai.flows_lock);
+
+ ai.flows[fd].tx_rb = shm_rbuff_open(ai.flows[fd].api,
+ ai.flows[fd].port_id);
+ if (ai.flows[fd].tx_rb == NULL) {
+ pthread_rwlock_unlock(&ai.flows_lock);
+ pthread_rwlock_unlock(&ai.data_lock);
+ return -1;
+ }
+
+ ai.flows[fd].set = shm_flow_set_open(ai.flows[fd].api);
+ if (ai.flows[fd].set == NULL) {
+ pthread_rwlock_unlock(&ai.flows_lock);
+ pthread_rwlock_unlock(&ai.data_lock);
+ return -1;
+ }
+
+ pthread_rwlock_unlock(&ai.flows_lock);
+
irm_msg__free_unpacked(recv_msg, NULL);
return ret;
@@ -1061,7 +1229,7 @@ int ipcp_flow_read(int fd, struct shm_du_buff ** sdb)
pthread_rwlock_unlock(&ai.flows_lock);
pthread_rwlock_unlock(&ai.data_lock);
- idx = shm_ap_rbuff_read_port(ai.rb, port_id);
+ idx = shm_rbuff_read(ai.flows[fd].rx_rb);
if (idx < 0) {
pthread_rwlock_rdlock(&ai.data_lock);
pthread_rwlock_rdlock(&ai.flows_lock);
@@ -1081,7 +1249,7 @@ int ipcp_flow_read(int fd, struct shm_du_buff ** sdb)
int ipcp_flow_write(int fd, struct shm_du_buff * sdb)
{
- struct rb_entry e;
+ ssize_t idx;
if (sdb == NULL)
return -EINVAL;
@@ -1095,16 +1263,16 @@ int ipcp_flow_write(int fd, struct shm_du_buff * sdb)
return -EPERM;
}
- if (ai.flows[fd].rb == NULL) {
+ if (ai.flows[fd].tx_rb == NULL) {
pthread_rwlock_unlock(&ai.flows_lock);
pthread_rwlock_unlock(&ai.data_lock);
return -EPERM;
}
- e.index = shm_du_buff_get_idx(sdb);
- e.port_id = ai.flows[fd].port_id;
+ idx = shm_du_buff_get_idx(sdb);
- shm_ap_rbuff_write(ai.flows[fd].rb, &e);
+ shm_rbuff_write(ai.flows[fd].tx_rb, idx);
+ shm_flow_set_notify(ai.flows[fd].set, ai.flows[fd].port_id);
pthread_rwlock_unlock(&ai.flows_lock);
pthread_rwlock_unlock(&ai.data_lock);
@@ -1112,46 +1280,28 @@ int ipcp_flow_write(int fd, struct shm_du_buff * sdb)
return 0;
}
-struct rb_entry * local_flow_read(int fd)
+ssize_t local_flow_read(int fd)
{
- int port_id;
- struct rb_entry * e = NULL;
-
- pthread_rwlock_rdlock(&ai.data_lock);
- pthread_rwlock_rdlock(&ai.flows_lock);
-
- port_id = ai.flows[fd].port_id;
-
- pthread_rwlock_unlock(&ai.flows_lock);
- pthread_rwlock_unlock(&ai.data_lock);
-
- if (port_id != -1) {
- e = malloc(sizeof(*e));
- if (e == NULL)
- return NULL;
- e->index = shm_ap_rbuff_read_port(ai.rb, port_id);
- }
-
- return e;
+ return shm_rbuff_read(ai.flows[fd].rx_rb);
}
-int local_flow_write(int fd, struct rb_entry * e)
+int local_flow_write(int fd, ssize_t idx)
{
- if (e == NULL || fd < 0)
+ if (fd < 0)
return -EINVAL;
pthread_rwlock_rdlock(&ai.data_lock);
pthread_rwlock_rdlock(&ai.flows_lock);
- if (ai.flows[fd].rb == NULL) {
+ if (ai.flows[fd].tx_rb == NULL) {
pthread_rwlock_unlock(&ai.flows_lock);
pthread_rwlock_unlock(&ai.data_lock);
return -EPERM;
}
- e->port_id = ai.flows[fd].port_id;
+ shm_rbuff_write(ai.flows[fd].tx_rb, idx);
- shm_ap_rbuff_write(ai.flows[fd].rb, e);
+ shm_flow_set_notify(ai.flows[fd].set, ai.flows[fd].port_id);
pthread_rwlock_unlock(&ai.flows_lock);
pthread_rwlock_unlock(&ai.data_lock);
@@ -1159,22 +1309,26 @@ int local_flow_write(int fd, struct rb_entry * e)
return 0;
}
-int ipcp_read_shim(struct shm_du_buff ** sdb)
+int ipcp_read_shim(int fd, struct shm_du_buff ** sdb)
{
- int fd;
- struct rb_entry * e = shm_ap_rbuff_read(ai.rb);
+ ssize_t idx;
pthread_rwlock_rdlock(&ai.data_lock);
pthread_rwlock_rdlock(&ai.flows_lock);
- fd = ai.ports[e->port_id].fd;
+ if (ai.flows[fd].rx_rb == NULL) {
+ pthread_rwlock_unlock(&ai.flows_lock);
+ pthread_rwlock_unlock(&ai.data_lock);
+ return -EPERM;
+ }
- *sdb = shm_rdrbuff_get(ai.rdrb, e->index);
+ idx = shm_rbuff_read(ai.flows[fd].rx_rb);
+ *sdb = shm_rdrbuff_get(ai.rdrb, idx);
pthread_rwlock_unlock(&ai.flows_lock);
pthread_rwlock_unlock(&ai.data_lock);
- return fd;
+ return 0;
}
void ipcp_flow_del(struct shm_du_buff * sdb)
diff --git a/src/lib/lockfile.c b/src/lib/lockfile.c
index 04ce9324..a0222f18 100644
--- a/src/lib/lockfile.c
+++ b/src/lib/lockfile.c
@@ -39,10 +39,10 @@
struct lockfile {
pid_t * api;
- int fd;
};
struct lockfile * lockfile_create() {
+ int fd;
mode_t mask;
struct lockfile * lf = malloc(sizeof(*lf));
if (lf == NULL)
@@ -50,8 +50,8 @@ struct lockfile * lockfile_create() {
mask = umask(0);
- lf->fd = shm_open(LOCKFILE_NAME, O_CREAT | O_EXCL | O_RDWR, 0666);
- if (lf->fd == -1) {
+ fd = shm_open(LOCKFILE_NAME, O_CREAT | O_EXCL | O_RDWR, 0666);
+ if (fd == -1) {
LOG_DBGF("Could not create lock file.");
free(lf);
return NULL;
@@ -59,30 +59,24 @@ struct lockfile * lockfile_create() {
umask(mask);
- if (ftruncate(lf->fd, LF_SIZE - 1) < 0) {
+ if (ftruncate(fd, LF_SIZE - 1) < 0) {
LOG_DBGF("Failed to extend lockfile.");
free(lf);
return NULL;
}
-#ifndef __APPLE__
- if (write(lf->fd, "", 1) != 1) {
- LOG_DBGF("Failed to finalise lockfile.");
- free(lf);
- return NULL;
- }
-#endif
+
lf->api = mmap(NULL,
LF_SIZE, PROT_READ | PROT_WRITE,
MAP_SHARED,
- lf->fd,
+ fd,
0);
+ close (fd);
+
if (lf->api == MAP_FAILED) {
LOG_DBGF("Failed to map lockfile.");
-
if (shm_unlink(LOCKFILE_NAME) == -1)
LOG_DBGF("Failed to remove invalid lockfile.");
-
free(lf);
return NULL;
}
@@ -93,12 +87,13 @@ struct lockfile * lockfile_create() {
}
struct lockfile * lockfile_open() {
+ int fd;
struct lockfile * lf = malloc(sizeof(*lf));
if (lf == NULL)
return NULL;
- lf->fd = shm_open(LOCKFILE_NAME, O_RDWR, 0666);
- if (lf->fd < 0) {
+ fd = shm_open(LOCKFILE_NAME, O_RDWR, 0666);
+ if (fd < 0) {
LOG_DBGF("Could not open lock file.");
free(lf);
return NULL;
@@ -107,15 +102,15 @@ struct lockfile * lockfile_open() {
lf->api = mmap(NULL,
LF_SIZE, PROT_READ | PROT_WRITE,
MAP_SHARED,
- lf->fd,
+ fd,
0);
+ close(fd);
+
if (lf->api == MAP_FAILED) {
LOG_DBGF("Failed to map lockfile.");
-
if (shm_unlink(LOCKFILE_NAME) == -1)
LOG_DBGF("Failed to remove invalid lockfile.");
-
free(lf);
return NULL;
}
@@ -130,9 +125,6 @@ void lockfile_close(struct lockfile * lf)
return;
}
- if (close(lf->fd) < 0)
- LOG_DBGF("Couldn't close lockfile.");
-
if (munmap(lf->api, LF_SIZE) == -1)
LOG_DBGF("Couldn't unmap lockfile.");
@@ -151,9 +143,6 @@ void lockfile_destroy(struct lockfile * lf)
return;
}
- if (close(lf->fd) < 0)
- LOG_DBGF("Couldn't close lockfile.");
-
if (munmap(lf->api, LF_SIZE) == -1)
LOG_DBGF("Couldn't unmap lockfile.");
diff --git a/src/lib/shm_ap_rbuff.c b/src/lib/shm_ap_rbuff.c
deleted file mode 100644
index 5cbf5bd0..00000000
--- a/src/lib/shm_ap_rbuff.c
+++ /dev/null
@@ -1,661 +0,0 @@
-/*
- * Ouroboros - Copyright (C) 2016
- *
- * Ring buffer for application processes
- *
- * Dimitri Staessens <dimitri.staessens@intec.ugent.be>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-#include <ouroboros/config.h>
-#include <ouroboros/shm_ap_rbuff.h>
-#include <ouroboros/lockfile.h>
-#include <ouroboros/time_utils.h>
-#include <ouroboros/errno.h>
-
-#define OUROBOROS_PREFIX "shm_ap_rbuff"
-
-#include <ouroboros/logs.h>
-
-#include <pthread.h>
-#include <sys/mman.h>
-#include <fcntl.h>
-#include <stdlib.h>
-#include <string.h>
-#include <stdint.h>
-#include <unistd.h>
-#include <signal.h>
-#include <sys/stat.h>
-#include <assert.h>
-
-#define FN_MAX_CHARS 255
-
-#define SHM_RBUFF_FILE_SIZE (SHM_BUFFER_SIZE * sizeof(struct rb_entry) \
- + IRMD_MAX_FLOWS * sizeof(int8_t) \
- + IRMD_MAX_FLOWS * sizeof (ssize_t) \
- + 2 * sizeof(size_t) + sizeof(pthread_mutex_t) \
- + 2 * sizeof (pthread_cond_t))
-
-#define shm_rbuff_used(rb)((*rb->head + SHM_BUFFER_SIZE - *rb->tail) \
- & (SHM_BUFFER_SIZE - 1))
-#define shm_rbuff_free(rb)(shm_rbuff_used(rb) + 1 < SHM_BUFFER_SIZE)
-#define shm_rbuff_empty(rb) (*rb->head == *rb->tail)
-#define head_el_ptr(rb) (rb->shm_base + *rb->head)
-#define tail_el_ptr(rb) (rb->shm_base + *rb->tail)
-
-struct shm_ap_rbuff {
- struct rb_entry * shm_base; /* start of entry */
- size_t * head; /* start of ringbuffer head */
- size_t * tail; /* start of ringbuffer tail */
- int8_t * acl; /* start of port_id access table */
- ssize_t * cntrs; /* start of port_id counters */
- pthread_mutex_t * lock; /* lock all free space in shm */
- pthread_cond_t * add; /* SDU arrived */
- pthread_cond_t * del; /* SDU removed */
- pid_t api; /* api to which this rb belongs */
- int fd;
-};
-
-struct shm_ap_rbuff * shm_ap_rbuff_create()
-{
- struct shm_ap_rbuff * rb;
- int shm_fd;
- struct rb_entry * shm_base;
- pthread_mutexattr_t mattr;
- pthread_condattr_t cattr;
- char fn[FN_MAX_CHARS];
- mode_t mask;
- int i;
-
- sprintf(fn, SHM_AP_RBUFF_PREFIX "%d", getpid());
-
- rb = malloc(sizeof(*rb));
- if (rb == NULL) {
- LOG_DBG("Could not allocate struct.");
- return NULL;
- }
-
- mask = umask(0);
-
- shm_fd = shm_open(fn, O_CREAT | O_EXCL | O_RDWR, 0666);
- if (shm_fd == -1) {
- LOG_DBG("Failed creating ring buffer.");
- free(rb);
- return NULL;
- }
-
- umask(mask);
-
- if (ftruncate(shm_fd, SHM_RBUFF_FILE_SIZE - 1) < 0) {
- LOG_DBG("Failed to extend ringbuffer.");
- free(rb);
- return NULL;
- }
-#ifndef __APPLE__
- if (write(shm_fd, "", 1) != 1) {
- LOG_DBG("Failed to finalise extension of ringbuffer.");
- free(rb);
- return NULL;
- }
-#endif
- shm_base = mmap(NULL,
- SHM_RBUFF_FILE_SIZE,
- PROT_READ | PROT_WRITE,
- MAP_SHARED,
- shm_fd,
- 0);
-
- if (shm_base == MAP_FAILED) {
- LOG_DBG("Failed to map shared memory.");
- if (close(shm_fd) == -1)
- LOG_DBG("Failed to close invalid shm.");
-
- if (shm_unlink(fn) == -1)
- LOG_DBG("Failed to remove invalid shm.");
-
- free(rb);
- return NULL;
- }
-
- rb->shm_base = shm_base;
- rb->head = (size_t *) (rb->shm_base + SHM_BUFFER_SIZE);
- rb->tail = rb->head + 1;
- rb->acl = (int8_t *) (rb->tail + 1);
- rb->cntrs = (ssize_t *) (rb->acl + IRMD_MAX_FLOWS);
- rb->lock = (pthread_mutex_t *) (rb->cntrs + IRMD_MAX_FLOWS);
- rb->add = (pthread_cond_t *) (rb->lock + 1);
- rb->del = rb->add + 1;
-
- pthread_mutexattr_init(&mattr);
-#ifndef __APPLE__
- pthread_mutexattr_setrobust(&mattr, PTHREAD_MUTEX_ROBUST);
-#endif
- pthread_mutexattr_setpshared(&mattr, PTHREAD_PROCESS_SHARED);
- pthread_mutex_init(rb->lock, &mattr);
-
- pthread_condattr_init(&cattr);
- pthread_condattr_setpshared(&cattr, PTHREAD_PROCESS_SHARED);
-#ifndef __APPLE__
- pthread_condattr_setclock(&cattr, PTHREAD_COND_CLOCK);
-#endif
- for (i = 0; i < IRMD_MAX_FLOWS; ++i) {
- rb->cntrs[i] = 0;
- rb->acl[i] = -1;
- }
-
- pthread_cond_init(rb->add, &cattr);
- pthread_cond_init(rb->del, &cattr);
-
- *rb->head = 0;
- *rb->tail = 0;
-
- rb->fd = shm_fd;
- rb->api = getpid();
-
- return rb;
-}
-
-struct shm_ap_rbuff * shm_ap_rbuff_open(pid_t api)
-{
- struct shm_ap_rbuff * rb;
- int shm_fd;
- struct rb_entry * shm_base;
- char fn[FN_MAX_CHARS];
-
- sprintf(fn, SHM_AP_RBUFF_PREFIX "%d", api);
-
- rb = malloc(sizeof(*rb));
- if (rb == NULL) {
- LOG_DBG("Could not allocate struct.");
- return NULL;
- }
-
- shm_fd = shm_open(fn, O_RDWR, 0666);
- if (shm_fd == -1) {
- LOG_DBG("%d failed opening shared memory %s.", getpid(), fn);
- free(rb);
- return NULL;
- }
-
- shm_base = mmap(NULL,
- SHM_RBUFF_FILE_SIZE,
- PROT_READ | PROT_WRITE,
- MAP_SHARED,
- shm_fd,
- 0);
-
- if (shm_base == MAP_FAILED) {
- LOG_DBG("Failed to map shared memory.");
- if (close(shm_fd) == -1)
- LOG_DBG("Failed to close invalid shm.");
-
- if (shm_unlink(fn) == -1)
- LOG_DBG("Failed to remove invalid shm.");
-
- free(rb);
- return NULL;
- }
-
- rb->shm_base = shm_base;
- rb->head = (size_t *) (rb->shm_base + SHM_BUFFER_SIZE);
- rb->tail = rb->head + 1;
- rb->acl = (int8_t *) (rb->tail + 1);
- rb->cntrs = (ssize_t *) (rb->acl + IRMD_MAX_FLOWS);
- rb->lock = (pthread_mutex_t *) (rb->cntrs + IRMD_MAX_FLOWS);
- rb->add = (pthread_cond_t *) (rb->lock + 1);
- rb->del = rb->add + 1;
-
- rb->fd = shm_fd;
- rb->api = api;
-
- return rb;
-}
-
-void shm_ap_rbuff_close(struct shm_ap_rbuff * rb)
-{
- assert(rb);
-
- if (close(rb->fd) < 0)
- LOG_DBG("Couldn't close shared memory.");
-
- if (munmap(rb->shm_base, SHM_RBUFF_FILE_SIZE) == -1)
- LOG_DBG("Couldn't unmap shared memory.");
-
- free(rb);
-}
-
-void shm_ap_rbuff_open_port(struct shm_ap_rbuff * rb, int port_id)
-{
- assert(rb);
-
-#ifdef __APPLE__
- pthread_mutex_lock(rb->lock);
-#else
- if (pthread_mutex_lock(rb->lock) == EOWNERDEAD) {
- LOG_DBG("Recovering dead mutex.");
- pthread_mutex_consistent(rb->lock);
- }
-#endif
- rb->acl[port_id] = 0; /* open */
-
- pthread_mutex_unlock(rb->lock);
-}
-
-int shm_ap_rbuff_close_port(struct shm_ap_rbuff * rb, int port_id)
-{
- int ret = 0;
-
- assert(rb);
-
-#ifdef __APPLE__
- pthread_mutex_lock(rb->lock);
-#else
- if (pthread_mutex_lock(rb->lock) == EOWNERDEAD) {
- LOG_DBG("Recovering dead mutex.");
- pthread_mutex_consistent(rb->lock);
- }
-#endif
- rb->acl[port_id] = -1;
-
- if (rb->cntrs[port_id] > 0)
- ret = -EBUSY;
-
- pthread_mutex_unlock(rb->lock);
-
- return ret;
-}
-
-void shm_ap_rbuff_destroy(struct shm_ap_rbuff * rb)
-{
- char fn[25];
- struct lockfile * lf = NULL;
-
- assert(rb);
-
- if (rb->api != getpid()) {
- lf = lockfile_open();
- if (lf == NULL)
- return;
- if (lockfile_owner(lf) == getpid()) {
- LOG_DBG("Ringbuffer %d destroyed by IRMd %d.",
- rb->api, getpid());
- lockfile_close(lf);
- } else {
- LOG_ERR("AP-I %d tried to destroy rbuff owned by %d.",
- getpid(), rb->api);
- lockfile_close(lf);
- return;
- }
- }
-
- if (close(rb->fd) < 0)
- LOG_DBG("Couldn't close shared memory.");
-
- sprintf(fn, SHM_AP_RBUFF_PREFIX "%d", rb->api);
-
- if (munmap(rb->shm_base, SHM_RBUFF_FILE_SIZE) == -1)
- LOG_DBG("Couldn't unmap shared memory.");
-
- if (shm_unlink(fn) == -1)
- LOG_DBG("Failed to unlink shm.");
-
- free(rb);
-}
-
-int shm_ap_rbuff_write(struct shm_ap_rbuff * rb, struct rb_entry * e)
-{
- assert(rb);
- assert(e);
-
-#ifdef __APPLE__
- pthread_mutex_lock(rb->lock);
-#else
- if (pthread_mutex_lock(rb->lock) == EOWNERDEAD) {
- LOG_DBG("Recovering dead mutex.");
- pthread_mutex_consistent(rb->lock);
- }
-#endif
- if (rb->acl[e->port_id]) {
- pthread_mutex_unlock(rb->lock);
- return -ENOTALLOC;
- }
-
- if (!shm_rbuff_free(rb)) {
- pthread_mutex_unlock(rb->lock);
- return -1;
- }
-
- if (shm_rbuff_empty(rb))
- pthread_cond_broadcast(rb->add);
-
- *head_el_ptr(rb) = *e;
- *rb->head = (*rb->head + 1) & (SHM_BUFFER_SIZE -1);
-
- ++rb->cntrs[e->port_id];
-
- pthread_mutex_unlock(rb->lock);
-
- return 0;
-}
-
-int shm_ap_rbuff_pop_idx(struct shm_ap_rbuff * rb)
-{
- int ret = 0;
-
- assert(rb);
-
-#ifdef __APPLE__
- pthread_mutex_lock(rb->lock);
-#else
- if (pthread_mutex_lock(rb->lock) == EOWNERDEAD) {
- LOG_DBG("Recovering dead mutex.");
- pthread_mutex_consistent(rb->lock);
- }
-#endif
- if (shm_rbuff_empty(rb)) {
- pthread_mutex_unlock(rb->lock);
- return -1;
- }
-
- ret = tail_el_ptr(rb)->index;
- --rb->cntrs[tail_el_ptr(rb)->port_id];
- *rb->tail = (*rb->tail + 1) & (SHM_BUFFER_SIZE -1);
-
- pthread_mutex_unlock(rb->lock);
-
- return ret;
-}
-
-static int shm_ap_rbuff_peek_b_all(struct shm_ap_rbuff * rb,
- const struct timespec * timeout)
-{
- struct timespec abstime;
- int ret = 0;
-
- assert(rb);
-
- if (timeout != NULL) {
- clock_gettime(PTHREAD_COND_CLOCK, &abstime);
- ts_add(&abstime, timeout, &abstime);
- }
-
- pthread_cleanup_push((void(*)(void *))pthread_mutex_unlock,
- (void *) rb->lock);
-#ifdef __APPLE__
- pthread_mutex_lock(rb->lock);
-#else
- if (pthread_mutex_lock(rb->lock) == EOWNERDEAD) {
- LOG_DBG("Recovering dead mutex.");
- pthread_mutex_consistent(rb->lock);
- }
-#endif
- while (shm_rbuff_empty(rb)) {
- if (timeout != NULL)
- ret = pthread_cond_timedwait(rb->add,
- rb->lock,
- &abstime);
- else
- ret = pthread_cond_wait(rb->add, rb->lock);
-#ifndef __APPLE__
- if (ret == EOWNERDEAD) {
- LOG_DBG("Recovering dead mutex.");
- pthread_mutex_consistent(rb->lock);
- }
-#endif
- if (ret == ETIMEDOUT)
- break;
- }
-
- if (ret != ETIMEDOUT)
- ret = tail_el_ptr(rb)->port_id;
- else
- ret = -ETIMEDOUT;
-
- pthread_cleanup_pop(true);
-
- return ret;
-}
-
-int shm_ap_rbuff_peek_b(struct shm_ap_rbuff * rb,
- bool * set,
- const struct timespec * timeout)
-{
- struct timespec abstime;
- int ret;
-
- assert(rb);
-
- if (set == NULL)
- return shm_ap_rbuff_peek_b_all(rb, timeout);
-
-#ifdef __APPLE__
- pthread_mutex_lock(rb->lock);
-#else
- if (pthread_mutex_lock(rb->lock) == EOWNERDEAD) {
- LOG_DBG("Recovering dead mutex.");
- pthread_mutex_consistent(rb->lock);
- }
-#endif
- if (timeout != NULL) {
- clock_gettime(PTHREAD_COND_CLOCK, &abstime);
- ts_add(&abstime, timeout, &abstime);
- }
-
- pthread_cleanup_push((void(*)(void *))pthread_mutex_unlock,
- (void *) rb->lock);
-
- while ((shm_rbuff_empty(rb) || !set[tail_el_ptr(rb)->port_id])
- && (ret != ETIMEDOUT)) {
- while (shm_rbuff_empty(rb)) {
- if (timeout != NULL)
- ret = pthread_cond_timedwait(rb->add,
- rb->lock,
- &abstime);
- else
- ret = pthread_cond_wait(rb->add, rb->lock);
-
-#ifndef __APPLE__
- if (ret == EOWNERDEAD) {
- LOG_DBG("Recovering dead mutex.");
- pthread_mutex_consistent(rb->lock);
- }
-#endif
- if (ret == ETIMEDOUT)
- break;
- }
-
- while (!set[tail_el_ptr(rb)->port_id]) {
- if (timeout != NULL)
- ret = pthread_cond_timedwait(rb->del,
- rb->lock,
- &abstime);
- else
- ret = pthread_cond_wait(rb->del, rb->lock);
-
-#ifndef __APPLE__
- if (ret == EOWNERDEAD) {
- LOG_DBG("Recovering dead mutex.");
- pthread_mutex_consistent(rb->lock);
- }
-#endif
- if (ret == ETIMEDOUT)
- break;
- }
- }
-
- if (ret != ETIMEDOUT)
- ret = tail_el_ptr(rb)->port_id;
- else
- ret = -ETIMEDOUT;
-
- pthread_cleanup_pop(true);
-
- return ret;
-}
-
-
-struct rb_entry * shm_ap_rbuff_read(struct shm_ap_rbuff * rb)
-{
- struct rb_entry * e = NULL;
-
- assert(rb);
-
- pthread_cleanup_push((void(*)(void *))pthread_mutex_unlock,
- (void *) rb->lock);
-#ifdef __APPLE__
- pthread_mutex_lock(rb->lock);
-#else
- if (pthread_mutex_lock(rb->lock) == EOWNERDEAD) {
- LOG_DBG("Recovering dead mutex.");
- pthread_mutex_consistent(rb->lock);
- }
-#endif
- while (shm_rbuff_empty(rb))
-#ifdef __APPLE__
- pthread_cond_wait(rb->add, rb->lock);
-#else
- if (pthread_cond_wait(rb->add, rb->lock) == EOWNERDEAD) {
- LOG_DBG("Recovering dead mutex.");
- pthread_mutex_consistent(rb->lock);
- }
-#endif
- e = malloc(sizeof(*e));
- if (e != NULL) {
- *e = *(rb->shm_base + *rb->tail);
- --rb->cntrs[e->port_id];
- *rb->tail = (*rb->tail + 1) & (SHM_BUFFER_SIZE -1);
- }
-
- pthread_cleanup_pop(true);
-
- return e;
-}
-
-ssize_t shm_ap_rbuff_read_port(struct shm_ap_rbuff * rb, int port_id)
-{
- ssize_t idx = -1;
-
- assert(rb);
-
-#ifdef __APPLE__
- pthread_mutex_lock(rb->lock);
-#else
- if (pthread_mutex_lock(rb->lock) == EOWNERDEAD) {
- LOG_DBG("Recovering dead mutex.");
- pthread_mutex_consistent(rb->lock);
- }
-#endif
- if (shm_rbuff_empty(rb) || tail_el_ptr(rb)->port_id != port_id) {
- pthread_mutex_unlock(rb->lock);
- return -1;
- }
-
- idx = tail_el_ptr(rb)->index;
- --rb->cntrs[port_id];
- *rb->tail = (*rb->tail + 1) & (SHM_BUFFER_SIZE -1);
-
- pthread_cond_broadcast(rb->del);
- pthread_mutex_unlock(rb->lock);
-
- return idx;
-}
-
-ssize_t shm_ap_rbuff_read_port_b(struct shm_ap_rbuff * rb,
- int port_id,
- const struct timespec * timeout)
-{
- struct timespec abstime;
- int ret = 0;
- ssize_t idx = -1;
-
- assert(rb);
-
-#ifdef __APPLE__
- pthread_mutex_lock(rb->lock);
-#else
- if (pthread_mutex_lock(rb->lock) == EOWNERDEAD) {
- LOG_DBG("Recovering dead mutex.");
- pthread_mutex_consistent(rb->lock);
- }
-#endif
- if (timeout != NULL) {
- idx = -ETIMEDOUT;
- clock_gettime(PTHREAD_COND_CLOCK, &abstime);
- ts_add(&abstime, timeout, &abstime);
- }
-
- pthread_cleanup_push((void(*)(void *))pthread_mutex_unlock,
- (void *) rb->lock);
-
- while ((shm_rbuff_empty(rb) || tail_el_ptr(rb)->port_id != port_id)
- && (ret != ETIMEDOUT)) {
- while (shm_rbuff_empty(rb)) {
- if (timeout != NULL)
- ret = pthread_cond_timedwait(rb->add,
- rb->lock,
- &abstime);
- else
- ret = pthread_cond_wait(rb->add, rb->lock);
-#ifndef __APPLE__
- if (ret == EOWNERDEAD) {
- LOG_DBG("Recovering dead mutex.");
- pthread_mutex_consistent(rb->lock);
- }
-#endif
- if (ret == ETIMEDOUT)
- break;
- }
-
- while (tail_el_ptr(rb)->port_id != port_id) {
- if (timeout != NULL)
- ret = pthread_cond_timedwait(rb->del,
- rb->lock,
- &abstime);
- else
- ret = pthread_cond_wait(rb->del, rb->lock);
-#ifndef __APPLE__
- if (ret == EOWNERDEAD) {
- LOG_DBG("Recovering dead mutex.");
- pthread_mutex_consistent(rb->lock);
- }
-#endif
- if (ret == ETIMEDOUT)
- break;
- }
- }
-
- if (ret != ETIMEDOUT) {
- idx = tail_el_ptr(rb)->index;
- --rb->cntrs[port_id];
- *rb->tail = (*rb->tail + 1) & (SHM_BUFFER_SIZE -1);
-
- pthread_cond_broadcast(rb->del);
- }
-
- pthread_cleanup_pop(true);
-
- return idx;
-}
-
-void shm_ap_rbuff_reset(struct shm_ap_rbuff * rb)
-{
- assert(rb);
-
- pthread_mutex_lock(rb->lock);
- *rb->tail = 0;
- *rb->head = 0;
- pthread_mutex_unlock(rb->lock);
-}
diff --git a/src/lib/shm_flow_set.c b/src/lib/shm_flow_set.c
new file mode 100644
index 00000000..04de9fc5
--- /dev/null
+++ b/src/lib/shm_flow_set.c
@@ -0,0 +1,407 @@
+/*
+ * Ouroboros - Copyright (C) 2016
+ *
+ * Management of flow_sets for fqueue
+ *
+ * Dimitri Staessens <dimitri.staessens@intec.ugent.be>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <ouroboros/config.h>
+#include <ouroboros/lockfile.h>
+#include <ouroboros/time_utils.h>
+#include <ouroboros/shm_flow_set.h>
+#include <ouroboros/fqueue.h>
+#include <ouroboros/errno.h>
+
+#define OUROBOROS_PREFIX "shm_flow_set"
+
+#include <ouroboros/logs.h>
+
+#include <pthread.h>
+#include <sys/mman.h>
+#include <fcntl.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <signal.h>
+#include <sys/stat.h>
+#include <string.h>
+#include <assert.h>
+
+#define FN_MAX_CHARS 255
+
+#define FQUEUESIZE (SHM_BUFFER_SIZE * sizeof(int))
+
+#define SHM_FLOW_SET_FILE_SIZE (IRMD_MAX_FLOWS * sizeof(ssize_t) \
+ + AP_MAX_FQUEUES * sizeof(size_t) \
+ + AP_MAX_FQUEUES * sizeof(pthread_cond_t) \
+ + AP_MAX_FQUEUES * FQUEUESIZE \
+ + sizeof(pthread_mutex_t))
+
+#define fqueue_ptr(fs, idx) (fs->fqueues + SHM_BUFFER_SIZE * idx)
+
+struct shm_flow_set {
+ ssize_t * mtable;
+ size_t * heads;
+ pthread_cond_t * conds;
+ int * fqueues;
+ pthread_mutex_t * lock;
+
+ pid_t api;
+};
+
+struct shm_flow_set * shm_flow_set_create()
+{
+ struct shm_flow_set * set;
+ ssize_t * shm_base;
+ pthread_mutexattr_t mattr;
+ pthread_condattr_t cattr;
+ char fn[FN_MAX_CHARS];
+ mode_t mask;
+ int shm_fd;
+ int i;
+
+ sprintf(fn, SHM_FLOW_SET_PREFIX "%d", getpid());
+
+ set = malloc(sizeof(*set));
+ if (set == NULL) {
+ LOG_DBG("Could not allocate struct.");
+ return NULL;
+ }
+
+ mask = umask(0);
+
+ shm_fd = shm_open(fn, O_CREAT | O_EXCL | O_RDWR, 0666);
+ if (shm_fd == -1) {
+ LOG_DBG("Failed creating flag file.");
+ free(set);
+ return NULL;
+ }
+
+ umask(mask);
+
+ if (ftruncate(shm_fd, SHM_FLOW_SET_FILE_SIZE - 1) < 0) {
+ LOG_DBG("Failed to extend flag file.");
+ free(set);
+ close(shm_fd);
+ return NULL;
+ }
+
+ shm_base = mmap(NULL,
+ SHM_FLOW_SET_FILE_SIZE,
+ PROT_READ | PROT_WRITE,
+ MAP_SHARED,
+ shm_fd,
+ 0);
+
+ close(shm_fd);
+
+ if (shm_base == MAP_FAILED) {
+ LOG_DBG("Failed to map shared memory.");
+ if (shm_unlink(fn) == -1)
+ LOG_DBG("Failed to remove invalid shm.");
+
+ free(set);
+ return NULL;
+ }
+
+ set->mtable = shm_base;
+ set->heads = (size_t *) (set->mtable + IRMD_MAX_FLOWS);
+ set->conds = (pthread_cond_t *)(set->heads + AP_MAX_FQUEUES);
+ set->fqueues = (int *) (set->conds + AP_MAX_FQUEUES);
+ set->lock = (pthread_mutex_t *)
+ (set->fqueues + AP_MAX_FQUEUES * SHM_BUFFER_SIZE);
+
+ pthread_mutexattr_init(&mattr);
+#ifndef __APPLE__
+ pthread_mutexattr_setrobust(&mattr, PTHREAD_MUTEX_ROBUST);
+#endif
+ pthread_mutexattr_setpshared(&mattr, PTHREAD_PROCESS_SHARED);
+ pthread_mutex_init(set->lock, &mattr);
+
+ pthread_condattr_init(&cattr);
+ pthread_condattr_setpshared(&cattr, PTHREAD_PROCESS_SHARED);
+#ifndef __APPLE__
+ pthread_condattr_setclock(&cattr, PTHREAD_COND_CLOCK);
+#endif
+ for (i = 0; i < AP_MAX_FQUEUES; ++i) {
+ set->heads[i] = 0;
+ pthread_cond_init(&set->conds[i], &cattr);
+ }
+
+ for (i = 0; i < IRMD_MAX_FLOWS; ++i)
+ set->mtable[i] = -1;
+
+ set->api = getpid();
+
+ return set;
+}
+
+struct shm_flow_set * shm_flow_set_open(pid_t api)
+{
+ struct shm_flow_set * set;
+ ssize_t * shm_base;
+ char fn[FN_MAX_CHARS];
+ int shm_fd;
+
+ sprintf(fn, SHM_FLOW_SET_PREFIX "%d", api);
+
+ set = malloc(sizeof(*set));
+ if (set == NULL) {
+ LOG_DBG("Could not allocate struct.");
+ return NULL;
+ }
+
+ shm_fd = shm_open(fn, O_RDWR, 0666);
+ if (shm_fd == -1) {
+ LOG_DBG("%d failed opening shared memory %s.", getpid(), fn);
+ free(set);
+ return NULL;
+ }
+
+ shm_base = mmap(NULL,
+ SHM_FLOW_SET_FILE_SIZE,
+ PROT_READ | PROT_WRITE,
+ MAP_SHARED,
+ shm_fd,
+ 0);
+
+ close(shm_fd);
+
+ if (shm_base == MAP_FAILED) {
+ LOG_DBG("Failed to map shared memory.");
+ if (shm_unlink(fn) == -1)
+ LOG_DBG("Failed to remove invalid shm.");
+ free(set);
+ return NULL;
+ }
+
+ set->mtable = shm_base;
+ set->heads = (size_t *) (set->mtable + IRMD_MAX_FLOWS);
+ set->conds = (pthread_cond_t *)(set->heads + AP_MAX_FQUEUES);
+ set->fqueues = (int *) (set->conds + AP_MAX_FQUEUES);
+ set->lock = (pthread_mutex_t *)
+ (set->fqueues + AP_MAX_FQUEUES * SHM_BUFFER_SIZE);
+
+ set->api = api;
+
+ return set;
+}
+
+void shm_flow_set_destroy(struct shm_flow_set * set)
+{
+ char fn[25];
+ struct lockfile * lf = NULL;
+
+ assert(set);
+
+ if (set->api != getpid()) {
+ lf = lockfile_open();
+ if (lf == NULL) {
+ LOG_ERR("Failed to open lockfile.");
+ return;
+ }
+
+ if (lockfile_owner(lf) == getpid()) {
+ LOG_DBG("Flow set %d destroyed by IRMd %d.",
+ set->api, getpid());
+ lockfile_close(lf);
+ } else {
+ LOG_ERR("AP-I %d tried to destroy flowset owned by %d.",
+ getpid(), set->api);
+ lockfile_close(lf);
+ return;
+ }
+ }
+
+ sprintf(fn, SHM_FLOW_SET_PREFIX "%d", set->api);
+
+ if (munmap(set->mtable, SHM_FLOW_SET_FILE_SIZE) == -1)
+ LOG_DBG("Couldn't unmap shared memory.");
+
+ if (shm_unlink(fn) == -1)
+ LOG_DBG("Failed to unlink shm.");
+
+ free(set);
+}
+
+void shm_flow_set_close(struct shm_flow_set * set)
+{
+ assert(set);
+
+ if (munmap(set->mtable, SHM_FLOW_SET_FILE_SIZE) == -1)
+ LOG_DBG("Couldn't unmap shared memory.");
+
+ free(set);
+}
+
+void shm_flow_set_zero(struct shm_flow_set * shm_set,
+ ssize_t idx)
+{
+ ssize_t i = 0;
+
+ assert(!(idx < 0) && idx < AP_MAX_FQUEUES);
+
+ pthread_mutex_lock(shm_set->lock);
+
+ for (i = 0; i < IRMD_MAX_FLOWS; ++i)
+ if (shm_set->mtable[i] == idx)
+ shm_set->mtable[i] = -1;
+
+ shm_set->heads[idx] = 0;
+
+ pthread_mutex_unlock(shm_set->lock);
+}
+
+
+int shm_flow_set_add(struct shm_flow_set * shm_set,
+ ssize_t idx,
+ int port_id)
+{
+ assert(shm_set);
+ assert(!(port_id < 0) && port_id < IRMD_MAX_FLOWS);
+ assert(!(idx < 0) && idx < AP_MAX_FQUEUES);
+
+ pthread_mutex_lock(shm_set->lock);
+
+ if (shm_set->mtable[port_id] != -1) {
+ pthread_mutex_unlock(shm_set->lock);
+ return -EPERM;
+ }
+
+ shm_set->mtable[port_id] = idx;
+
+ pthread_mutex_unlock(shm_set->lock);
+
+ return 0;
+}
+
+void shm_flow_set_del(struct shm_flow_set * shm_set,
+ ssize_t idx,
+ int port_id)
+{
+ assert(shm_set);
+ assert(!(port_id < 0) && port_id < IRMD_MAX_FLOWS);
+ assert(!(idx < 0) && idx < AP_MAX_FQUEUES);
+
+ pthread_mutex_lock(shm_set->lock);
+
+ if (shm_set->mtable[port_id] == idx)
+ shm_set->mtable[port_id] = -1;
+
+ pthread_mutex_unlock(shm_set->lock);
+}
+
+int shm_flow_set_has(struct shm_flow_set * shm_set,
+ ssize_t idx,
+ int port_id)
+{
+ int ret = 0;
+
+ assert(shm_set);
+ assert(!(port_id < 0) && port_id < IRMD_MAX_FLOWS);
+ assert(!(idx < 0) && idx < AP_MAX_FQUEUES);
+
+ pthread_mutex_lock(shm_set->lock);
+
+ if (shm_set->mtable[port_id] == idx)
+ ret = 1;
+
+ pthread_mutex_unlock(shm_set->lock);
+
+ return ret;
+}
+
+void shm_flow_set_notify(struct shm_flow_set * shm_set, int port_id)
+{
+ assert(shm_set);
+ assert(!(port_id < 0) && port_id < IRMD_MAX_FLOWS);
+
+ pthread_mutex_lock(shm_set->lock);
+
+ if (shm_set->mtable[port_id] == -1) {
+ pthread_mutex_unlock(shm_set->lock);
+ return;
+ }
+
+ *(fqueue_ptr(shm_set, shm_set->mtable[port_id]) +
+ (shm_set->heads[shm_set->mtable[port_id]])++) = port_id;
+
+ pthread_cond_signal(&shm_set->conds[shm_set->mtable[port_id]]);
+
+ pthread_mutex_unlock(shm_set->lock);
+}
+
+
+int shm_flow_set_wait(const struct shm_flow_set * shm_set,
+ ssize_t idx,
+ int * fqueue,
+ const struct timespec * timeout)
+{
+ int ret = 0;
+ struct timespec abstime;
+
+ assert(shm_set);
+ assert(!(idx < 0) && idx < AP_MAX_FQUEUES);
+
+#ifdef __APPLE__
+ pthread_mutex_lock(shm_set->lock);
+#else
+ if (pthread_mutex_lock(shm_set->lock) == EOWNERDEAD) {
+ LOG_DBG("Recovering dead mutex.");
+ pthread_mutex_consistent(shm_set->lock);
+ }
+#endif
+ if (timeout != NULL) {
+ clock_gettime(PTHREAD_COND_CLOCK, &abstime);
+ ts_add(&abstime, timeout, &abstime);
+ }
+
+ pthread_cleanup_push((void(*)(void *))pthread_mutex_unlock,
+ (void *) shm_set->lock);
+
+ while (shm_set->heads[idx] == 0 && ret != -ETIMEDOUT) {
+ if (timeout != NULL)
+ ret = pthread_cond_timedwait(shm_set->conds + idx,
+ shm_set->lock,
+ &abstime);
+ else
+ ret = pthread_cond_wait(shm_set->conds + idx,
+ shm_set->lock);
+#ifndef __APPLE__
+ if (ret == EOWNERDEAD) {
+ LOG_DBG("Recovering dead mutex.");
+ pthread_mutex_consistent(shm_set->lock);
+ }
+#endif
+ if (ret == ETIMEDOUT) {
+ ret = -ETIMEDOUT;
+ break;
+ }
+ }
+
+ if (ret != -ETIMEDOUT) {
+ memcpy(fqueue,
+ fqueue_ptr(shm_set, idx),
+ shm_set->heads[idx] * sizeof(int));
+ ret = shm_set->heads[idx];
+ shm_set->heads[idx] = 0;
+ }
+
+ pthread_cleanup_pop(true);
+
+ return ret;
+}
diff --git a/src/lib/shm_rbuff.c b/src/lib/shm_rbuff.c
new file mode 100644
index 00000000..a933fbff
--- /dev/null
+++ b/src/lib/shm_rbuff.c
@@ -0,0 +1,405 @@
+/*
+ * Ouroboros - Copyright (C) 2016
+ *
+ * Ring buffer for incoming SDUs
+ *
+ * Dimitri Staessens <dimitri.staessens@intec.ugent.be>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <ouroboros/config.h>
+#include <ouroboros/shm_rbuff.h>
+#include <ouroboros/lockfile.h>
+#include <ouroboros/time_utils.h>
+#include <ouroboros/errno.h>
+
+#define OUROBOROS_PREFIX "shm_rbuff"
+
+#include <ouroboros/logs.h>
+
+#include <pthread.h>
+#include <sys/mman.h>
+#include <fcntl.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdint.h>
+#include <unistd.h>
+#include <signal.h>
+#include <sys/stat.h>
+#include <assert.h>
+#include <stdbool.h>
+
+#define FN_MAX_CHARS 255
+
+#define SHM_RBUFF_FILE_SIZE (SHM_BUFFER_SIZE * sizeof(ssize_t) \
+ + 2 * sizeof(size_t) + sizeof(int8_t) \
+ + sizeof(pthread_mutex_t) \
+ + 2 * sizeof (pthread_cond_t))
+
+#define shm_rbuff_used(rb) ((*rb->head + SHM_BUFFER_SIZE - *rb->tail) \
+ & (SHM_BUFFER_SIZE - 1))
+#define shm_rbuff_free(rb) (shm_rbuff_used(rb) + 1 < SHM_BUFFER_SIZE)
+#define shm_rbuff_empty(rb) (*rb->head == *rb->tail)
+#define head_el_ptr(rb) (rb->shm_base + *rb->head)
+#define tail_el_ptr(rb) (rb->shm_base + *rb->tail)
+
+struct shm_rbuff {
+ ssize_t * shm_base; /* start of entry */
+ size_t * head; /* start of ringbuffer head */
+ size_t * tail; /* start of ringbuffer tail */
+ int8_t * acl; /* access control */
+ pthread_mutex_t * lock; /* lock all free space in shm */
+ pthread_cond_t * add; /* SDU arrived */
+ pthread_cond_t * del; /* SDU removed */
+ pid_t api; /* api of the owner */
+ int port_id; /* port_id of the flow */
+};
+
+struct shm_rbuff * shm_rbuff_create(pid_t api, int port_id)
+{
+ struct shm_rbuff * rb;
+ int shm_fd;
+ ssize_t * shm_base;
+ pthread_mutexattr_t mattr;
+ pthread_condattr_t cattr;
+ char fn[FN_MAX_CHARS];
+ mode_t mask;
+
+ sprintf(fn, SHM_RBUFF_PREFIX "%d.%d", api, port_id);
+
+ rb = malloc(sizeof(*rb));
+ if (rb == NULL) {
+ LOG_DBG("Could not allocate struct.");
+ return NULL;
+ }
+
+ mask = umask(0);
+
+ shm_fd = shm_open(fn, O_CREAT | O_EXCL | O_RDWR, 0666);
+ if (shm_fd == -1) {
+ LOG_DBG("Failed creating ring buffer.");
+ free(rb);
+ return NULL;
+ }
+
+ umask(mask);
+
+ if (ftruncate(shm_fd, SHM_RBUFF_FILE_SIZE - 1) < 0) {
+ LOG_DBG("Failed to extend ringbuffer.");
+ free(rb);
+ close(shm_fd);
+ return NULL;
+ }
+
+ shm_base = mmap(NULL,
+ SHM_RBUFF_FILE_SIZE,
+ PROT_READ | PROT_WRITE,
+ MAP_SHARED,
+ shm_fd,
+ 0);
+
+ close(shm_fd);
+
+ if (shm_base == MAP_FAILED) {
+ LOG_DBG("Failed to map shared memory.");
+ if (shm_unlink(fn) == -1)
+ LOG_DBG("Failed to remove invalid shm.");
+ free(rb);
+ return NULL;
+ }
+
+ rb->shm_base = shm_base;
+ rb->head = (size_t *) (rb->shm_base + SHM_BUFFER_SIZE);
+ rb->tail = rb->head + 1;
+ rb->acl = (int8_t *) (rb->tail + 1);
+ rb->lock = (pthread_mutex_t *) (rb->acl + 1);
+ rb->add = (pthread_cond_t *) (rb->lock + 1);
+ rb->del = rb->add + 1;
+
+ pthread_mutexattr_init(&mattr);
+#ifndef __APPLE__
+ pthread_mutexattr_setrobust(&mattr, PTHREAD_MUTEX_ROBUST);
+#endif
+ pthread_mutexattr_setpshared(&mattr, PTHREAD_PROCESS_SHARED);
+ pthread_mutex_init(rb->lock, &mattr);
+
+ pthread_condattr_init(&cattr);
+ pthread_condattr_setpshared(&cattr, PTHREAD_PROCESS_SHARED);
+#ifndef __APPLE__
+ pthread_condattr_setclock(&cattr, PTHREAD_COND_CLOCK);
+#endif
+ pthread_cond_init(rb->add, &cattr);
+ pthread_cond_init(rb->del, &cattr);
+
+ *rb->acl = 0;
+ *rb->head = 0;
+ *rb->tail = 0;
+
+ rb->api = api;
+ rb->port_id = port_id;
+
+ if (munmap(rb->shm_base, SHM_RBUFF_FILE_SIZE) == -1)
+ LOG_DBG("Couldn't unmap shared memory.");
+
+ return rb;
+}
+
+struct shm_rbuff * shm_rbuff_open(pid_t api, int port_id)
+{
+ struct shm_rbuff * rb;
+ int shm_fd;
+ ssize_t * shm_base;
+ char fn[FN_MAX_CHARS];
+
+ sprintf(fn, SHM_RBUFF_PREFIX "%d.%d", api, port_id);
+
+ rb = malloc(sizeof(*rb));
+ if (rb == NULL) {
+ LOG_DBG("Could not allocate struct.");
+ return NULL;
+ }
+
+ shm_fd = shm_open(fn, O_RDWR, 0666);
+ if (shm_fd == -1) {
+ LOG_DBG("%d failed opening shared memory %s.", getpid(), fn);
+ free(rb);
+ return NULL;
+ }
+
+ shm_base = mmap(NULL,
+ SHM_RBUFF_FILE_SIZE,
+ PROT_READ | PROT_WRITE,
+ MAP_SHARED,
+ shm_fd,
+ 0);
+
+ close(shm_fd);
+
+ if (shm_base == MAP_FAILED) {
+ LOG_DBG("Failed to map shared memory.");
+ if (shm_unlink(fn) == -1)
+ LOG_DBG("Failed to remove invalid shm.");
+
+ free(rb);
+ return NULL;
+ }
+
+ rb->shm_base = shm_base;
+ rb->head = (size_t *) (rb->shm_base + SHM_BUFFER_SIZE);
+ rb->tail = rb->head + 1;
+ rb->acl = (int8_t *) (rb->tail + 1);
+ rb->lock = (pthread_mutex_t *) (rb->acl + 1);
+ rb->add = (pthread_cond_t *) (rb->lock + 1);
+ rb->del = rb->add + 1;
+
+ rb->api = api;
+ rb->port_id = port_id;
+
+ return rb;
+}
+
+void shm_rbuff_close(struct shm_rbuff * rb)
+{
+ assert(rb);
+
+ if (munmap(rb->shm_base, SHM_RBUFF_FILE_SIZE) == -1)
+ LOG_DBG("Couldn't unmap shared memory.");
+
+ free(rb);
+}
+
+void shm_rbuff_destroy(struct shm_rbuff * rb)
+{
+ char fn[25];
+
+ if (rb == NULL)
+ return;
+
+ sprintf(fn, SHM_RBUFF_PREFIX "%d.%d", rb->api, rb->port_id);
+
+ if (shm_unlink(fn) == -1)
+ LOG_DBG("Failed to unlink shm %s.", fn);
+
+ free(rb);
+}
+
+int shm_rbuff_write(struct shm_rbuff * rb, ssize_t idx)
+{
+ assert(rb);
+ assert(idx >= 0);
+
+#ifdef __APPLE__
+ pthread_mutex_lock(rb->lock);
+#else
+ if (pthread_mutex_lock(rb->lock) == EOWNERDEAD) {
+ LOG_DBG("Recovering dead mutex.");
+ pthread_mutex_consistent(rb->lock);
+ }
+#endif
+ if (*rb->acl) {
+ pthread_mutex_unlock(rb->lock);
+ return -ENOTALLOC;
+ }
+
+ if (!shm_rbuff_free(rb)) {
+ pthread_mutex_unlock(rb->lock);
+ return -1;
+ }
+
+ if (shm_rbuff_empty(rb))
+ pthread_cond_broadcast(rb->add);
+
+ *head_el_ptr(rb) = idx;
+ *rb->head = (*rb->head + 1) & (SHM_BUFFER_SIZE -1);
+
+ pthread_mutex_unlock(rb->lock);
+
+ return 0;
+}
+
+ssize_t shm_rbuff_read(struct shm_rbuff * rb)
+{
+ int ret = 0;
+
+ assert(rb);
+
+#ifdef __APPLE__
+ pthread_mutex_lock(rb->lock);
+#else
+ if (pthread_mutex_lock(rb->lock) == EOWNERDEAD) {
+ LOG_DBG("Recovering dead mutex.");
+ pthread_mutex_consistent(rb->lock);
+ }
+#endif
+ if (shm_rbuff_empty(rb)) {
+ pthread_mutex_unlock(rb->lock);
+ return -1;
+ }
+
+ ret = *tail_el_ptr(rb);
+ *rb->tail = (*rb->tail + 1) & (SHM_BUFFER_SIZE -1);
+
+ pthread_mutex_unlock(rb->lock);
+
+ return ret;
+}
+
+ssize_t shm_rbuff_read_b(struct shm_rbuff * rb,
+ const struct timespec * timeout)
+{
+ struct timespec abstime;
+ int ret = 0;
+ ssize_t idx = -1;
+
+ assert(rb);
+
+#ifdef __APPLE__
+ pthread_mutex_lock(rb->lock);
+#else
+ if (pthread_mutex_lock(rb->lock) == EOWNERDEAD) {
+ LOG_DBG("Recovering dead mutex.");
+ pthread_mutex_consistent(rb->lock);
+ }
+#endif
+ if (timeout != NULL) {
+ idx = -ETIMEDOUT;
+ clock_gettime(PTHREAD_COND_CLOCK, &abstime);
+ ts_add(&abstime, timeout, &abstime);
+ }
+
+ pthread_cleanup_push((void(*)(void *))pthread_mutex_unlock,
+ (void *) rb->lock);
+
+ while (shm_rbuff_empty(rb) && (ret != ETIMEDOUT)) {
+ if (timeout != NULL)
+ ret = pthread_cond_timedwait(rb->add,
+ rb->lock,
+ &abstime);
+ else
+ ret = pthread_cond_wait(rb->add, rb->lock);
+#ifndef __APPLE__
+ if (ret == EOWNERDEAD) {
+ LOG_DBG("Recovering dead mutex.");
+ pthread_mutex_consistent(rb->lock);
+ }
+#endif
+ if (ret == ETIMEDOUT) {
+ idx = -ETIMEDOUT;
+ break;
+ }
+ }
+
+ if (idx != -ETIMEDOUT) {
+ idx = *tail_el_ptr(rb);
+ *rb->tail = (*rb->tail + 1) & (SHM_BUFFER_SIZE -1);
+ pthread_cond_broadcast(rb->del);
+ }
+
+ pthread_cleanup_pop(true);
+
+ return idx;
+}
+
+int shm_rbuff_block(struct shm_rbuff * rb)
+{
+ int ret = 0;
+
+ assert(rb);
+
+#ifdef __APPLE__
+ pthread_mutex_lock(rb->lock);
+#else
+ if (pthread_mutex_lock(rb->lock) == EOWNERDEAD) {
+ LOG_DBG("Recovering dead mutex.");
+ pthread_mutex_consistent(rb->lock);
+ }
+#endif
+ *rb->acl = -1;
+
+ if (!shm_rbuff_empty(rb))
+ ret = -EBUSY;
+
+ pthread_mutex_unlock(rb->lock);
+
+ return ret;
+}
+
+void shm_rbuff_unblock(struct shm_rbuff * rb)
+{
+ assert(rb);
+
+#ifdef __APPLE__
+ pthread_mutex_lock(rb->lock);
+#else
+ if (pthread_mutex_lock(rb->lock) == EOWNERDEAD) {
+ LOG_DBG("Recovering dead mutex.");
+ pthread_mutex_consistent(rb->lock);
+ }
+#endif
+ *rb->acl = 0; /* open */
+
+ pthread_mutex_unlock(rb->lock);
+}
+
+void shm_rbuff_reset(struct shm_rbuff * rb)
+{
+ assert(rb);
+
+ pthread_mutex_lock(rb->lock);
+ *rb->tail = 0;
+ *rb->head = 0;
+ pthread_mutex_unlock(rb->lock);
+}
diff --git a/src/lib/shm_rdrbuff.c b/src/lib/shm_rdrbuff.c
index f6683dc2..e5a37577 100644
--- a/src/lib/shm_rdrbuff.c
+++ b/src/lib/shm_rdrbuff.c
@@ -90,7 +90,6 @@ struct shm_rdrbuff {
pthread_cond_t * full; /* run sanitizer when buffer full */
pid_t * api; /* api of the irmd owner */
enum qos_cube qos; /* qos id which this buffer serves */
- int fd;
};
static void garbage_collect(struct shm_rdrbuff * rdrb)
@@ -189,17 +188,11 @@ struct shm_rdrbuff * shm_rdrbuff_create()
if (ftruncate(shm_fd, SHM_FILE_SIZE - 1) < 0) {
LOG_DBGF("Failed to extend shared memory map.");
free(shm_rdrb_fn);
+ close(shm_fd);
free(rdrb);
return NULL;
}
-#ifndef __APPLE
- if (write(shm_fd, "", 1) != 1) {
- LOG_DBGF("Failed to finalise extension of shared memory map.");
- free(shm_rdrb_fn);
- free(rdrb);
- return NULL;
- }
-#endif
+
shm_base = mmap(NULL,
SHM_FILE_SIZE,
PROT_READ | PROT_WRITE,
@@ -207,6 +200,8 @@ struct shm_rdrbuff * shm_rdrbuff_create()
shm_fd,
0);
+ close(shm_fd);
+
if (shm_base == MAP_FAILED) {
LOG_DBGF("Failed to map shared memory.");
if (shm_unlink(shm_rdrb_fn) == -1)
@@ -235,6 +230,9 @@ struct shm_rdrbuff * shm_rdrbuff_create()
pthread_condattr_init(&cattr);
pthread_condattr_setpshared(&cattr, PTHREAD_PROCESS_SHARED);
+#ifndef __APPLE__
+ pthread_condattr_setclock(&cattr, PTHREAD_COND_CLOCK);
+#endif
pthread_cond_init(rdrb->full, &cattr);
pthread_cond_init(rdrb->healthy, &cattr);
@@ -246,7 +244,6 @@ struct shm_rdrbuff * shm_rdrbuff_create()
*rdrb->api = getpid();
rdrb->qos = qos;
- rdrb->fd = shm_fd;
free(shm_rdrb_fn);
@@ -287,10 +284,11 @@ struct shm_rdrbuff * shm_rdrbuff_open()
MAP_SHARED,
shm_fd,
0);
+
+ close(shm_fd);
+
if (shm_base == MAP_FAILED) {
LOG_DBGF("Failed to map shared memory.");
- if (close(shm_fd) == -1)
- LOG_DBG("Failed to close invalid shm.");
if (shm_unlink(shm_rdrb_fn) == -1)
LOG_DBG("Failed to unlink invalid shm.");
free(shm_rdrb_fn);
@@ -309,7 +307,6 @@ struct shm_rdrbuff * shm_rdrbuff_open()
rdrb->api = (pid_t *) (rdrb->full + 1);
rdrb->qos = qos;
- rdrb->fd = shm_fd;
free(shm_rdrb_fn);
@@ -400,9 +397,6 @@ void shm_rdrbuff_close(struct shm_rdrbuff * rdrb)
{
assert(rdrb);
- if (close(rdrb->fd) < 0)
- LOG_DBGF("Couldn't close shared memory.");
-
if (munmap(rdrb->shm_base, SHM_FILE_SIZE) == -1)
LOG_DBGF("Couldn't unmap shared memory.");
@@ -420,9 +414,6 @@ void shm_rdrbuff_destroy(struct shm_rdrbuff * rdrb)
return;
}
- if (close(rdrb->fd) < 0)
- LOG_DBG("Couldn't close shared memory.");
-
if (munmap(rdrb->shm_base, SHM_FILE_SIZE) == -1)
LOG_DBG("Couldn't unmap shared memory.");