C++ sock_xmit函数代码示例

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本文整理汇总了C++中sock_xmit函数的典型用法代码示例。如果您正苦于以下问题：C++ sock_xmit函数的具体用法？C++ sock_xmit怎么用？C++ sock_xmit使用的例子？那么恭喜您, 这里精选的函数代码示例或许可以为您提供帮助。

在下文中一共展示了sock_xmit函数的6个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于我们的系统推荐出更棒的C++代码示例。

示例1: nbd_send_req

/* always call with the tx_lock held */
static int nbd_send_req(struct nbd_device *nbd, struct request *req)
{
	int result, flags;
	struct nbd_request request;
	unsigned long size = blk_rq_bytes(req);
	u32 type;

	if (req->cmd_type == REQ_TYPE_DRV_PRIV)
		type = NBD_CMD_DISC;
	else if (req->cmd_flags & REQ_DISCARD)
		type = NBD_CMD_TRIM;
	else if (req->cmd_flags & REQ_FLUSH)
		type = NBD_CMD_FLUSH;
	else if (rq_data_dir(req) == WRITE)
		type = NBD_CMD_WRITE;
	else
		type = NBD_CMD_READ;

	memset(&request, 0, sizeof(request));
	request.magic = htonl(NBD_REQUEST_MAGIC);
	request.type = htonl(type);
	if (type != NBD_CMD_FLUSH && type != NBD_CMD_DISC) {
		request.from = cpu_to_be64((u64)blk_rq_pos(req) << 9);
		request.len = htonl(size);
	}
	memcpy(request.handle, &req, sizeof(req));

	dev_dbg(nbd_to_dev(nbd), "request %p: sending control (%[email protected]%llu,%uB)\n",
		req, nbdcmd_to_ascii(type),
		(unsigned long long)blk_rq_pos(req) << 9, blk_rq_bytes(req));
	result = sock_xmit(nbd, 1, &request, sizeof(request),
			(type == NBD_CMD_WRITE) ? MSG_MORE : 0);
	if (result <= 0) {
		dev_err(disk_to_dev(nbd->disk),
			"Send control failed (result %d)\n", result);
		return -EIO;
	}

	if (type == NBD_CMD_WRITE) {
		struct req_iterator iter;
		struct bio_vec bvec;
		/*
		 * we are really probing at internals to determine
		 * whether to set MSG_MORE or not...
		 */
		rq_for_each_segment(bvec, req, iter) {
			flags = 0;
			if (!rq_iter_last(bvec, iter))
				flags = MSG_MORE;
			dev_dbg(nbd_to_dev(nbd), "request %p: sending %d bytes data\n",
				req, bvec.bv_len);
			result = sock_send_bvec(nbd, &bvec, flags);
			if (result <= 0) {
				dev_err(disk_to_dev(nbd->disk),
					"Send data failed (result %d)\n",
					result);
				return -EIO;
			}
		}
	}

开发者ID:AngleFork，项目名称:linux，代码行数:61，代码来源:nbd.c

示例2: nbd_send_req

void nbd_send_req(struct nbd_device *lo, struct request *req)
{
	int result, i, flags;
	struct nbd_request request;
	unsigned long size = req->nr_sectors << 9;
	struct socket *sock = lo->sock;

	request.magic = htonl(NBD_REQUEST_MAGIC);
	request.type = htonl(nbd_cmd(req));
	request.from = cpu_to_be64((u64) req->sector << 9);
	request.len = htonl(size);
	memcpy(request.handle, &req, sizeof(req));

	down(&lo->tx_lock);

	if (!sock || !lo->sock) {
		printk(KERN_ERR "%s: Attempted send on closed socket\n",
				lo->disk->disk_name);
		goto error_out;
	}

	dprintk(DBG_TX, "%s: request %p: sending control (%[email protected]%llu,%luB)\n",
			lo->disk->disk_name, req,
			nbdcmd_to_ascii(nbd_cmd(req)),
			(unsigned long long)req->sector << 9,
			req->nr_sectors << 9);
	result = sock_xmit(sock, 1, &request, sizeof(request),
			(nbd_cmd(req) == NBD_CMD_WRITE)? MSG_MORE: 0);
	if (result <= 0) {
		printk(KERN_ERR "%s: Send control failed (result %d)\n",
				lo->disk->disk_name, result);
		goto error_out;
	}

	if (nbd_cmd(req) == NBD_CMD_WRITE) {
		struct bio *bio;
		/*
		 * we are really probing at internals to determine
		 * whether to set MSG_MORE or not...
		 */
		rq_for_each_bio(bio, req) {
			struct bio_vec *bvec;
			bio_for_each_segment(bvec, bio, i) {
				flags = 0;
				if ((i < (bio->bi_vcnt - 1)) || bio->bi_next)
					flags = MSG_MORE;
				dprintk(DBG_TX, "%s: request %p: sending %d bytes data\n",
						lo->disk->disk_name, req,
						bvec->bv_len);
				result = sock_send_bvec(sock, bvec, flags);
				if (result <= 0) {
					printk(KERN_ERR "%s: Send data failed (result %d)\n",
							lo->disk->disk_name,
							result);
					goto error_out;
				}
			}
		}
	}

开发者ID:FelipeFernandes1988，项目名称:Alice-1121-Modem，代码行数:59，代码来源:nbd.c

示例3: sock_send_bvec

static inline int sock_send_bvec(struct nbd_device *lo, struct bio_vec *bvec,
		int flags)
{
	int result;
	void *kaddr = kmap(bvec->bv_page);
	result = sock_xmit(lo, 1, kaddr + bvec->bv_offset, bvec->bv_len, flags);
	kunmap(bvec->bv_page);
	return result;
}

开发者ID:deepikateriar，项目名称:Onlive-Source-Backup，代码行数:9，代码来源:nbd.c

示例4: nbd_send_req

/* always call with the tx_lock held */
static int nbd_send_req(struct nbd_device *nbd, struct request *req)
{
	int result, flags;
	struct nbd_request request;
	unsigned long size = blk_rq_bytes(req);

	request.magic = htonl(NBD_REQUEST_MAGIC);
	request.type = htonl(nbd_cmd(req));

	if (nbd_cmd(req) == NBD_CMD_FLUSH) {
		/* Other values are reserved for FLUSH requests.  */
		request.from = 0;
		request.len = 0;
	} else {
		request.from = cpu_to_be64((u64)blk_rq_pos(req) << 9);
		request.len = htonl(size);
	}
	memcpy(request.handle, &req, sizeof(req));

	dprintk(DBG_TX, "%s: request %p: sending control (%[email protected]%llu,%uB)\n",
			nbd->disk->disk_name, req,
			nbdcmd_to_ascii(nbd_cmd(req)),
			(unsigned long long)blk_rq_pos(req) << 9,
			blk_rq_bytes(req));
	result = sock_xmit(nbd, 1, &request, sizeof(request),
			(nbd_cmd(req) == NBD_CMD_WRITE) ? MSG_MORE : 0);
	if (result <= 0) {
		dev_err(disk_to_dev(nbd->disk),
			"Send control failed (result %d)\n", result);
		goto error_out;
	}

	if (nbd_cmd(req) == NBD_CMD_WRITE) {
		struct req_iterator iter;
		struct bio_vec *bvec;
		/*
		 * we are really probing at internals to determine
		 * whether to set MSG_MORE or not...
		 */
		rq_for_each_segment(bvec, req, iter) {
			flags = 0;
			if (!rq_iter_last(req, iter))
				flags = MSG_MORE;
			dprintk(DBG_TX, "%s: request %p: sending %d bytes data\n",
					nbd->disk->disk_name, req, bvec->bv_len);
			result = sock_send_bvec(nbd, bvec, flags);
			if (result <= 0) {
				dev_err(disk_to_dev(nbd->disk),
					"Send data failed (result %d)\n",
					result);
				goto error_out;
			}
		}
	}

开发者ID:MotexT，项目名称:android_kernel_sony_msm8994_kitakami_r2，代码行数:55，代码来源:nbd.c

示例5: nbd_send_req

/* always call with the tx_lock held */
static int nbd_send_req(struct nbd_device *lo, struct request *req)
{
	int result, flags;
	struct nbd_request request;
	unsigned long size = req->nr_sectors << 9;

	request.magic = htonl(NBD_REQUEST_MAGIC);
	request.type = htonl(nbd_cmd(req));
	request.from = cpu_to_be64((u64) req->sector << 9);
	request.len = htonl(size);
	memcpy(request.handle, &req, sizeof(req));

	dprintk(DBG_TX, "%s: request %p: sending control (%[email protected]%llu,%luB)\n",
			lo->disk->disk_name, req,
			nbdcmd_to_ascii(nbd_cmd(req)),
			(unsigned long long)req->sector << 9,
			req->nr_sectors << 9);
	result = sock_xmit(lo, 1, &request, sizeof(request),
			(nbd_cmd(req) == NBD_CMD_WRITE) ? MSG_MORE : 0);
	if (result <= 0) {
		printk(KERN_ERR "%s: Send control failed (result %d)\n",
				lo->disk->disk_name, result);
		goto error_out;
	}

	if (nbd_cmd(req) == NBD_CMD_WRITE) {
		struct req_iterator iter;
		struct bio_vec *bvec;
		/*
		 * we are really probing at internals to determine
		 * whether to set MSG_MORE or not...
		 */
		rq_for_each_segment(bvec, req, iter) {
			flags = 0;
			if (!rq_iter_last(req, iter))
				flags = MSG_MORE;
			dprintk(DBG_TX, "%s: request %p: sending %d bytes data\n",
					lo->disk->disk_name, req, bvec->bv_len);
			result = sock_send_bvec(lo, bvec, flags);
			if (result <= 0) {
				printk(KERN_ERR "%s: Send data failed (result %d)\n",
						lo->disk->disk_name, result);
				goto error_out;
			}
		}
	}

开发者ID:deepikateriar，项目名称:Onlive-Source-Backup，代码行数:47，代码来源:nbd.c

示例6: nbd_send_cmd

/* always call with the tx_lock held */
static int nbd_send_cmd(struct nbd_device *nbd, struct nbd_cmd *cmd, int index)
{
	struct request *req = blk_mq_rq_from_pdu(cmd);
	int result, flags;
	struct nbd_request request;
	unsigned long size = blk_rq_bytes(req);
	struct bio *bio;
	u32 type;
	u32 tag = blk_mq_unique_tag(req);

	if (req_op(req) == REQ_OP_DISCARD)
		type = NBD_CMD_TRIM;
	else if (req_op(req) == REQ_OP_FLUSH)
		type = NBD_CMD_FLUSH;
	else if (rq_data_dir(req) == WRITE)
		type = NBD_CMD_WRITE;
	else
		type = NBD_CMD_READ;

	memset(&request, 0, sizeof(request));
	request.magic = htonl(NBD_REQUEST_MAGIC);
	request.type = htonl(type);
	if (type != NBD_CMD_FLUSH) {
		request.from = cpu_to_be64((u64)blk_rq_pos(req) << 9);
		request.len = htonl(size);
	}
	memcpy(request.handle, &tag, sizeof(tag));

	dev_dbg(nbd_to_dev(nbd), "request %p: sending control (%[email protected]%llu,%uB)\n",
		cmd, nbdcmd_to_ascii(type),
		(unsigned long long)blk_rq_pos(req) << 9, blk_rq_bytes(req));
	result = sock_xmit(nbd, index, 1, &request, sizeof(request),
			(type == NBD_CMD_WRITE) ? MSG_MORE : 0);
	if (result <= 0) {
		dev_err_ratelimited(disk_to_dev(nbd->disk),
			"Send control failed (result %d)\n", result);
		return -EIO;
	}

	if (type != NBD_CMD_WRITE)
		return 0;

	flags = 0;
	bio = req->bio;
	while (bio) {
		struct bio *next = bio->bi_next;
		struct bvec_iter iter;
		struct bio_vec bvec;

		bio_for_each_segment(bvec, bio, iter) {
			bool is_last = !next && bio_iter_last(bvec, iter);

			if (is_last)
				flags = MSG_MORE;
			dev_dbg(nbd_to_dev(nbd), "request %p: sending %d bytes data\n",
				cmd, bvec.bv_len);
			result = sock_send_bvec(nbd, index, &bvec, flags);
			if (result <= 0) {
				dev_err(disk_to_dev(nbd->disk),
					"Send data failed (result %d)\n",
					result);
				return -EIO;
			}
			/*
			 * The completion might already have come in,
			 * so break for the last one instead of letting
			 * the iterator do it. This prevents use-after-free
			 * of the bio.
			 */
			if (is_last)
				break;
		}
		bio = next;
	}

开发者ID:kishore1006，项目名称:linux，代码行数:75，代码来源:nbd.c

注：本文中的sock_xmit函数示例由纯净天空整理自Github/MSDocs等源码及文档管理平台，相关代码片段筛选自各路编程大神贡献的开源项目，源码版权归原作者所有，传播和使用请参考对应项目的License；未经允许，请勿转载。