X-Git-Url: http://git.archive.openwrt.org/?p=project%2Fubus.git;a=blobdiff_plain;f=libubus-req.c;h=db5061cad70887f15ab261154c51c732f2ea94ef;hp=6947ac0150b67fa29b457e958546723dbaf00bde;hb=6f4e11e1db399074273944329883f9c35e7daef6;hpb=c2158ae53c5d53874c98e04ac4075ffa76a133fc

diff --git a/libubus-req.c b/libubus-req.c
index 6947ac0..db5061c 100644
--- a/libubus-req.c
+++ b/libubus-req.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2011-2012 Felix Fietkau <nbd@openwrt.org>
+ * Copyright (C) 2011-2014 Felix Fietkau <nbd@openwrt.org>
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU Lesser General Public License version 2.1
@@ -11,6 +11,7 @@
  * GNU General Public License for more details.
  */
 
+#include <unistd.h>
 #include "libubus.h"
 #include "libubus-internal.h"
 
@@ -48,10 +49,9 @@ static void __ubus_process_req_data(struct ubus_request *req)
 	}
 }
 
-int __hidden ubus_start_request(struct ubus_context *ctx, struct ubus_request *req,
+int __hidden __ubus_start_request(struct ubus_context *ctx, struct ubus_request *req,
 				struct blob_attr *msg, int cmd, uint32_t peer)
 {
-	memset(req, 0, sizeof(*req));
 
 	if (msg && blob_pad_len(msg) > UBUS_MAX_MSGLEN)
 		return -1;
@@ -61,12 +61,24 @@ int __hidden ubus_start_request(struct ubus_context *ctx, struct ubus_request *r
 	req->ctx = ctx;
 	req->peer = peer;
 	req->seq = ++ctx->request_seq;
-	return ubus_send_msg(ctx, req->seq, msg, cmd, peer);
+
+	return ubus_send_msg(ctx, req->seq, msg, cmd, peer, req->fd);
+}
+
+int __hidden ubus_start_request(struct ubus_context *ctx, struct ubus_request *req,
+				struct blob_attr *msg, int cmd, uint32_t peer)
+{
+	memset(req, 0, sizeof(*req));
+
+	req->fd = -1;
+
+	return __ubus_start_request(ctx, req, msg, cmd, peer);
 }
 
+
 void ubus_abort_request(struct ubus_context *ctx, struct ubus_request *req)
 {
-	if (!list_empty(&req->list))
+	if (list_empty(&req->list))
 		return;
 
 	req->cancelled = true;
@@ -113,38 +125,26 @@ static void ubus_sync_req_cb(struct ubus_request *req, int ret)
 	uloop_end();
 }
 
-struct ubus_sync_req_cb {
-	struct uloop_timeout timeout;
-	struct ubus_request *req;
-};
-
-static void ubus_sync_req_timeout_cb(struct uloop_timeout *timeout)
+static int64_t get_time_msec(void)
 {
-	struct ubus_sync_req_cb *cb;
+	struct timespec ts;
+	int64_t val;
 
-	cb = container_of(timeout, struct ubus_sync_req_cb, timeout);
-	ubus_set_req_status(cb->req, UBUS_STATUS_TIMEOUT);
+	clock_gettime(CLOCK_MONOTONIC, &ts);
+	val = (int64_t) ts.tv_sec * 1000LL;
+	val += ts.tv_nsec / 1000000LL;
+	return val;
 }
 
 int ubus_complete_request(struct ubus_context *ctx, struct ubus_request *req,
-			  int timeout)
+			  int req_timeout)
 {
-	struct ubus_sync_req_cb cb;
 	ubus_complete_handler_t complete_cb = req->complete_cb;
-	bool registered = ctx->sock.registered;
 	int status = UBUS_STATUS_NO_DATA;
+	int64_t timeout = 0, time_end = 0;
 
-	if (!registered) {
-		uloop_init();
-		ubus_add_uloop(ctx);
-	}
-
-	if (timeout) {
-		memset(&cb, 0, sizeof(cb));
-		cb.req = req;
-		cb.timeout.cb = ubus_sync_req_timeout_cb;
-		uloop_timeout_set(&cb.timeout, timeout);
-	}
+	if (req_timeout)
+		time_end = get_time_msec() + req_timeout;
 
 	ubus_complete_request_async(ctx, req);
 	req->complete_cb = ubus_sync_req_cb;
@@ -152,14 +152,27 @@ int ubus_complete_request(struct ubus_context *ctx, struct ubus_request *req,
 	ctx->stack_depth++;
 	while (!req->status_msg) {
 		bool cancelled = uloop_cancelled;
+
 		uloop_cancelled = false;
-		uloop_run();
+		if (req_timeout) {
+			timeout = time_end - get_time_msec();
+			if (timeout <= 0) {
+				ubus_set_req_status(req, UBUS_STATUS_TIMEOUT);
+				uloop_cancelled = cancelled;
+				break;
+			}
+		}
+		ubus_poll_data(ctx, (unsigned int) timeout);
+
 		uloop_cancelled = cancelled;
+		if (ctx->sock.eof) {
+			ubus_set_req_status(req, UBUS_STATUS_CONNECTION_FAILED);
+			break;
+		}
 	}
 	ctx->stack_depth--;
-
-	if (timeout)
-		uloop_timeout_cancel(&cb.timeout);
+	if (ctx->stack_depth)
+		uloop_cancelled = true;
 
 	if (req->status_msg)
 		status = req->status_code;
@@ -168,11 +181,8 @@ int ubus_complete_request(struct ubus_context *ctx, struct ubus_request *req,
 	if (req->complete_cb)
 		req->complete_cb(req, status);
 
-	if (!registered)
-		uloop_fd_delete(&ctx->sock);
-
-	if (!ctx->stack_depth)
-		ubus_process_pending_msg(ctx);
+	if (!ctx->stack_depth && !ctx->sock.registered)
+		ctx->pending_timer.cb(&ctx->pending_timer);
 
 	return status;
 }
@@ -182,7 +192,7 @@ void ubus_complete_deferred_request(struct ubus_context *ctx, struct ubus_reques
 	blob_buf_init(&b, 0);
 	blob_put_int32(&b, UBUS_ATTR_STATUS, ret);
 	blob_put_int32(&b, UBUS_ATTR_OBJID, req->object);
-	ubus_send_msg(ctx, req->seq, b.head, UBUS_MSG_STATUS, req->peer);
+	ubus_send_msg(ctx, req->seq, b.head, UBUS_MSG_STATUS, req->peer, req->fd);
 }
 
 int ubus_send_reply(struct ubus_context *ctx, struct ubus_request_data *req,
@@ -193,15 +203,16 @@ int ubus_send_reply(struct ubus_context *ctx, struct ubus_request_data *req,
 	blob_buf_init(&b, 0);
 	blob_put_int32(&b, UBUS_ATTR_OBJID, req->object);
 	blob_put(&b, UBUS_ATTR_DATA, blob_data(msg), blob_len(msg));
-	ret = ubus_send_msg(ctx, req->seq, b.head, UBUS_MSG_DATA, req->peer);
+	ret = ubus_send_msg(ctx, req->seq, b.head, UBUS_MSG_DATA, req->peer, -1);
 	if (ret < 0)
 		return UBUS_STATUS_NO_DATA;
 
 	return 0;
 }
 
-int ubus_invoke_async(struct ubus_context *ctx, uint32_t obj, const char *method,
-                       struct blob_attr *msg, struct ubus_request *req)
+int ubus_invoke_async_fd(struct ubus_context *ctx, uint32_t obj,
+			 const char *method, struct blob_attr *msg,
+			 struct ubus_request *req, int fd)
 {
 	blob_buf_init(&b, 0);
 	blob_put_int32(&b, UBUS_ATTR_OBJID, obj);
@@ -209,27 +220,98 @@ int ubus_invoke_async(struct ubus_context *ctx, uint32_t obj, const char *method
 	if (msg)
 		blob_put(&b, UBUS_ATTR_DATA, blob_data(msg), blob_len(msg));
 
-	if (ubus_start_request(ctx, req, b.head, UBUS_MSG_INVOKE, obj) < 0)
+	memset(req, 0, sizeof(*req));
+	req->fd = fd;
+	if (__ubus_start_request(ctx, req, b.head, UBUS_MSG_INVOKE, obj) < 0)
 		return UBUS_STATUS_INVALID_ARGUMENT;
-
 	return 0;
 }
 
-int ubus_invoke(struct ubus_context *ctx, uint32_t obj, const char *method,
-                struct blob_attr *msg, ubus_data_handler_t cb, void *priv,
-		int timeout)
+int ubus_invoke_fd(struct ubus_context *ctx, uint32_t obj, const char *method,
+		   struct blob_attr *msg, ubus_data_handler_t cb, void *priv,
+		   int timeout, int fd)
 {
 	struct ubus_request req;
+	int rc;
+
+	rc = ubus_invoke_async_fd(ctx, obj, method, msg, &req, fd);
+	if (rc)
+		return rc;
 
-	ubus_invoke_async(ctx, obj, method, msg, &req);
 	req.data_cb = cb;
 	req.priv = priv;
 	return ubus_complete_request(ctx, &req, timeout);
 }
 
-static bool ubus_get_status(struct ubus_msghdr *hdr, int *ret)
+static void
+ubus_notify_complete_cb(struct ubus_request *req, int ret)
+{
+	struct ubus_notify_request *nreq;
+
+	nreq = container_of(req, struct ubus_notify_request, req);
+	if (!nreq->complete_cb)
+		return;
+
+	nreq->complete_cb(nreq, 0, 0);
+}
+
+static int
+__ubus_notify_async(struct ubus_context *ctx, struct ubus_object *obj,
+		    const char *type, struct blob_attr *msg,
+		    struct ubus_notify_request *req, bool reply)
+{
+	memset(req, 0, sizeof(*req));
+
+	blob_buf_init(&b, 0);
+	blob_put_int32(&b, UBUS_ATTR_OBJID, obj->id);
+	blob_put_string(&b, UBUS_ATTR_METHOD, type);
+
+	if (!reply)
+		blob_put_int8(&b, UBUS_ATTR_NO_REPLY, true);
+
+	if (msg)
+		blob_put(&b, UBUS_ATTR_DATA, blob_data(msg), blob_len(msg));
+
+	if (ubus_start_request(ctx, &req->req, b.head, UBUS_MSG_NOTIFY, obj->id) < 0)
+		return UBUS_STATUS_INVALID_ARGUMENT;
+
+	/* wait for status message from ubusd first */
+	req->req.notify = true;
+	req->pending = 1;
+	req->id[0] = obj->id;
+	req->req.complete_cb = ubus_notify_complete_cb;
+
+	return 0;
+}
+
+int ubus_notify_async(struct ubus_context *ctx, struct ubus_object *obj,
+		      const char *type, struct blob_attr *msg,
+		      struct ubus_notify_request *req)
 {
-	struct blob_attr **attrbuf = ubus_parse_msg(hdr->data);
+	return __ubus_notify_async(ctx, obj, type, msg, req, true);
+}
+
+int ubus_notify(struct ubus_context *ctx, struct ubus_object *obj,
+		const char *type, struct blob_attr *msg, int timeout)
+{
+	struct ubus_notify_request req;
+	int ret;
+
+	ret = __ubus_notify_async(ctx, obj, type, msg, &req, timeout >= 0);
+	if (ret < 0)
+		return ret;
+
+	if (timeout < 0) {
+		ubus_abort_request(ctx, &req.req);
+		return 0;
+	}
+
+	return ubus_complete_request(ctx, &req.req, timeout);
+}
+
+static bool ubus_get_status(struct ubus_msghdr_buf *buf, int *ret)
+{
+	struct blob_attr **attrbuf = ubus_parse_msg(buf->data);
 
 	if (!attrbuf[UBUS_ATTR_STATUS])
 		return false;
@@ -239,26 +321,26 @@ static bool ubus_get_status(struct ubus_msghdr *hdr, int *ret)
 }
 
 static int
-ubus_process_req_status(struct ubus_request *req, struct ubus_msghdr *hdr)
+ubus_process_req_status(struct ubus_request *req, struct ubus_msghdr_buf *buf)
 {
 	int ret = UBUS_STATUS_INVALID_ARGUMENT;
 
-	ubus_get_status(hdr, &ret);
-	req->peer = hdr->peer;
+	ubus_get_status(buf, &ret);
+	req->peer = buf->hdr.peer;
 	ubus_set_req_status(req, ret);
 
 	return ret;
 }
 
 static void
-ubus_process_req_data(struct ubus_request *req, struct ubus_msghdr *hdr)
+ubus_process_req_data(struct ubus_request *req, struct ubus_msghdr_buf *buf)
 {
 	struct ubus_pending_data *data;
 	int len;
 
 	if (!req->blocked) {
 		req->blocked = true;
-		req_data_cb(req, hdr->type, hdr->data);
+		req_data_cb(req, buf->hdr.type, buf->data);
 		__ubus_process_req_data(req);
 		req->blocked = false;
 
@@ -268,23 +350,53 @@ ubus_process_req_data(struct ubus_request *req, struct ubus_msghdr *hdr)
 		return;
 	}
 
-	len = blob_raw_len(hdr->data);
+	len = blob_raw_len(buf->data);
 	data = calloc(1, sizeof(*data) + len);
 	if (!data)
 		return;
 
-	data->type = hdr->type;
-	memcpy(data->data, hdr->data, len);
+	data->type = buf->hdr.type;
+	memcpy(data->data, buf->data, len);
 	list_add(&data->list, &req->pending);
 }
 
+static int
+ubus_find_notify_id(struct ubus_notify_request *n, uint32_t objid)
+{
+	uint32_t pending = n->pending;
+	int i;
+
+	for (i = 0; pending; i++, pending >>= 1) {
+		if (!(pending & 1))
+			continue;
+
+		if (n->id[i] == objid)
+			return i;
+	}
+
+	return -1;
+}
+
 static struct ubus_request *
-ubus_find_request(struct ubus_context *ctx, uint32_t seq, uint32_t peer)
+ubus_find_request(struct ubus_context *ctx, uint32_t seq, uint32_t peer, int *id)
 {
 	struct ubus_request *req;
 
 	list_for_each_entry(req, &ctx->requests, list) {
-		if (seq != req->seq || peer != req->peer)
+		struct ubus_notify_request *nreq;
+		nreq = container_of(req, struct ubus_notify_request, req);
+
+		if (seq != req->seq)
+			continue;
+
+		if (req->notify) {
+			if (!nreq->pending)
+				continue;
+
+			*id = ubus_find_notify_id(nreq, peer);
+			if (*id < 0)
+				continue;
+		} else if (peer != req->peer)
 			continue;
 
 		return req;
@@ -292,23 +404,78 @@ ubus_find_request(struct ubus_context *ctx, uint32_t seq, uint32_t peer)
 	return NULL;
 }
 
-void __hidden ubus_process_req_msg(struct ubus_context *ctx, struct ubus_msghdr *hdr)
+static void ubus_process_notify_status(struct ubus_request *req, int id, struct ubus_msghdr_buf *buf)
+{
+	struct ubus_notify_request *nreq;
+	struct blob_attr **tb;
+	struct blob_attr *cur;
+	int rem, idx = 1;
+	int ret = 0;
+
+	nreq = container_of(req, struct ubus_notify_request, req);
+	nreq->pending &= ~(1 << id);
+
+	if (!id) {
+		/* first id: ubusd's status message with a list of ids */
+		tb = ubus_parse_msg(buf->data);
+		if (tb[UBUS_ATTR_SUBSCRIBERS]) {
+			blob_for_each_attr(cur, tb[UBUS_ATTR_SUBSCRIBERS], rem) {
+				if (!blob_check_type(blob_data(cur), blob_len(cur), BLOB_ATTR_INT32))
+					continue;
+
+				nreq->pending |= (1 << idx);
+				nreq->id[idx] = blob_get_int32(cur);
+				idx++;
+
+				if (idx == UBUS_MAX_NOTIFY_PEERS + 1)
+					break;
+			}
+		}
+	} else {
+		ubus_get_status(buf, &ret);
+		if (nreq->status_cb)
+			nreq->status_cb(nreq, id, ret);
+	}
+
+	if (!nreq->pending)
+		ubus_set_req_status(req, 0);
+}
+
+void __hidden ubus_process_req_msg(struct ubus_context *ctx, struct ubus_msghdr_buf *buf, int fd)
 {
+	struct ubus_msghdr *hdr = &buf->hdr;
 	struct ubus_request *req;
+	int id = -1;
 
 	switch(hdr->type) {
 	case UBUS_MSG_STATUS:
-		req = ubus_find_request(ctx, hdr->seq, hdr->peer);
+		req = ubus_find_request(ctx, hdr->seq, hdr->peer, &id);
 		if (!req)
 			break;
 
-		ubus_process_req_status(req, hdr);
+		if (fd >= 0) {
+			if (req->fd_cb)
+				req->fd_cb(req, fd);
+			else
+				close(fd);
+		}
+
+		if (id >= 0)
+			ubus_process_notify_status(req, id, buf);
+		else
+			ubus_process_req_status(req, buf);
 		break;
 
 	case UBUS_MSG_DATA:
-		req = ubus_find_request(ctx, hdr->seq, hdr->peer);
+		req = ubus_find_request(ctx, hdr->seq, hdr->peer, &id);
 		if (req && (req->data_cb || req->raw_data_cb))
-			ubus_process_req_data(req, hdr);
+			ubus_process_req_data(req, buf);
 		break;
 	}
 }
+
+int __ubus_monitor(struct ubus_context *ctx, const char *type)
+{
+	blob_buf_init(&b, 0);
+	return ubus_invoke(ctx, UBUS_SYSTEM_OBJECT_MONITOR, type, b.head, NULL, NULL, 1000);
+}