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d47761db97
With the addition of bess support which uses connection oriented SEQPACKET sockets the vector routines can now encounter a "remote end closed the connection" scenario. This adds handling code to detect it in the TX path and the legacy RX path. There is no way to detect it in the vector RX path because that can legitimately return 0 even if the remote end has not closed the connection. As a result the detection is delayed until the first TX event after the close. Signed-off-by: Anton Ivanov <anton.ivanov@cambridgegreys.com> Signed-off-by: Richard Weinberger <richard@nod.at>
131 lines
2.7 KiB
C
131 lines
2.7 KiB
C
/*
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* Copyright (C) 2002 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
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* Licensed under the GPL
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*/
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#ifndef __UM_VECTOR_KERN_H
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#define __UM_VECTOR_KERN_H
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#include <linux/netdevice.h>
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#include <linux/platform_device.h>
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#include <linux/skbuff.h>
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#include <linux/socket.h>
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#include <linux/list.h>
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#include <linux/ctype.h>
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#include <linux/workqueue.h>
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#include <linux/interrupt.h>
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#include "vector_user.h"
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/* Queue structure specially adapted for multiple enqueue/dequeue
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* in a mmsgrecv/mmsgsend context
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*/
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/* Dequeue method */
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#define QUEUE_SENDMSG 0
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#define QUEUE_SENDMMSG 1
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#define VECTOR_RX 1
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#define VECTOR_TX (1 << 1)
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#define VECTOR_BPF (1 << 2)
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#define VECTOR_QDISC_BYPASS (1 << 3)
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#define ETH_MAX_PACKET 1500
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#define ETH_HEADER_OTHER 32 /* just in case someone decides to go mad on QnQ */
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struct vector_queue {
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struct mmsghdr *mmsg_vector;
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void **skbuff_vector;
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/* backlink to device which owns us */
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struct net_device *dev;
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spinlock_t head_lock;
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spinlock_t tail_lock;
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int queue_depth, head, tail, max_depth, max_iov_frags;
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short options;
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};
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struct vector_estats {
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uint64_t rx_queue_max;
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uint64_t rx_queue_running_average;
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uint64_t tx_queue_max;
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uint64_t tx_queue_running_average;
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uint64_t rx_encaps_errors;
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uint64_t tx_timeout_count;
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uint64_t tx_restart_queue;
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uint64_t tx_kicks;
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uint64_t tx_flow_control_xon;
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uint64_t tx_flow_control_xoff;
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uint64_t rx_csum_offload_good;
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uint64_t rx_csum_offload_errors;
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uint64_t sg_ok;
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uint64_t sg_linearized;
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};
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#define VERIFY_HEADER_NOK -1
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#define VERIFY_HEADER_OK 0
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#define VERIFY_CSUM_OK 1
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struct vector_private {
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struct list_head list;
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spinlock_t lock;
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struct net_device *dev;
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int unit;
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/* Timeout timer in TX */
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struct timer_list tl;
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/* Scheduled "remove device" work */
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struct work_struct reset_tx;
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struct vector_fds *fds;
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struct vector_queue *rx_queue;
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struct vector_queue *tx_queue;
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int rx_irq;
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int tx_irq;
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struct arglist *parsed;
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void *transport_data; /* transport specific params if needed */
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int max_packet;
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int req_size; /* different from max packet - used for TSO */
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int headroom;
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int options;
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/* remote address if any - some transports will leave this as null */
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int header_size;
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int rx_header_size;
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int coalesce;
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void *header_rxbuffer;
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void *header_txbuffer;
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int (*form_header)(uint8_t *header,
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struct sk_buff *skb, struct vector_private *vp);
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int (*verify_header)(uint8_t *header,
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struct sk_buff *skb, struct vector_private *vp);
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spinlock_t stats_lock;
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struct tasklet_struct tx_poll;
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bool rexmit_scheduled;
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bool opened;
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bool in_write_poll;
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bool in_error;
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/* ethtool stats */
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struct vector_estats estats;
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void *bpf;
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char user[0];
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};
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extern int build_transport_data(struct vector_private *vp);
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#endif
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