Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /* SCTP kernel implementation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  * Copyright (c) 1999-2000 Cisco, Inc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  * Copyright (c) 1999-2001 Motorola, Inc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  * Copyright (c) 2002 International Business Machines, Corp.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  * This file is part of the SCTP kernel implementation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9)  * These functions are the methods for accessing the SCTP inqueue.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11)  * An SCTP inqueue is a queue into which you push SCTP packets
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12)  * (which might be bundles or fragments of chunks) and out of which you
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13)  * pop SCTP whole chunks.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15)  * Please send any bug reports or fixes you make to the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16)  * email address(es):
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17)  *    lksctp developers <linux-sctp@vger.kernel.org>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19)  * Written or modified by:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20)  *    La Monte H.P. Yarroll <piggy@acm.org>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21)  *    Karl Knutson <karl@athena.chicago.il.us>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) #include <net/sctp/sctp.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) #include <net/sctp/sm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) #include <linux/interrupt.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) /* Initialize an SCTP inqueue.  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) void sctp_inq_init(struct sctp_inq *queue)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 	INIT_LIST_HEAD(&queue->in_chunk_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 	queue->in_progress = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 	/* Create a task for delivering data.  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 	INIT_WORK(&queue->immediate, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) /* Release the memory associated with an SCTP inqueue.  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) void sctp_inq_free(struct sctp_inq *queue)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 	struct sctp_chunk *chunk, *tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 	/* Empty the queue.  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 	list_for_each_entry_safe(chunk, tmp, &queue->in_chunk_list, list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 		list_del_init(&chunk->list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 		sctp_chunk_free(chunk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 	/* If there is a packet which is currently being worked on,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 	 * free it as well.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 	if (queue->in_progress) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 		sctp_chunk_free(queue->in_progress);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 		queue->in_progress = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) /* Put a new packet in an SCTP inqueue.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62)  * We assume that packet->sctp_hdr is set and in host byte order.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) void sctp_inq_push(struct sctp_inq *q, struct sctp_chunk *chunk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 	/* Directly call the packet handling routine. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 	if (chunk->rcvr->dead) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 		sctp_chunk_free(chunk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 	/* We are now calling this either from the soft interrupt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 	 * or from the backlog processing.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 	 * Eventually, we should clean up inqueue to not rely
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 	 * on the BH related data structures.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 	list_add_tail(&chunk->list, &q->in_chunk_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 	if (chunk->asoc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 		chunk->asoc->stats.ipackets++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 	q->immediate.func(&q->immediate);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) /* Peek at the next chunk on the inqeue. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) struct sctp_chunkhdr *sctp_inq_peek(struct sctp_inq *queue)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 	struct sctp_chunk *chunk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 	struct sctp_chunkhdr *ch = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 	chunk = queue->in_progress;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 	/* If there is no more chunks in this packet, say so */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 	if (chunk->singleton ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 	    chunk->end_of_packet ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 	    chunk->pdiscard)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 		    return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 	ch = (struct sctp_chunkhdr *)chunk->chunk_end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 	return ch;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) /* Extract a chunk from an SCTP inqueue.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104)  * WARNING:  If you need to put the chunk on another queue, you need to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105)  * make a shallow copy (clone) of it.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) struct sctp_chunk *sctp_inq_pop(struct sctp_inq *queue)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 	struct sctp_chunk *chunk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 	struct sctp_chunkhdr *ch = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 	/* The assumption is that we are safe to process the chunks
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 	 * at this time.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 	chunk = queue->in_progress;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 	if (chunk) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 		/* There is a packet that we have been working on.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 		 * Any post processing work to do before we move on?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 		 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 		if (chunk->singleton ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 		    chunk->end_of_packet ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 		    chunk->pdiscard) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 			if (chunk->head_skb == chunk->skb) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 				chunk->skb = skb_shinfo(chunk->skb)->frag_list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 				goto new_skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 			}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 			if (chunk->skb->next) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 				chunk->skb = chunk->skb->next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 				goto new_skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 			}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 			if (chunk->head_skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 				chunk->skb = chunk->head_skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 			sctp_chunk_free(chunk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 			chunk = queue->in_progress = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 		} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 			/* Nothing to do. Next chunk in the packet, please. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 			ch = (struct sctp_chunkhdr *)chunk->chunk_end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 			/* Force chunk->skb->data to chunk->chunk_end.  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 			skb_pull(chunk->skb, chunk->chunk_end - chunk->skb->data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 			/* We are guaranteed to pull a SCTP header. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 	/* Do we need to take the next packet out of the queue to process? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 	if (!chunk) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 		struct list_head *entry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) next_chunk:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 		/* Is the queue empty?  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 		entry = sctp_list_dequeue(&queue->in_chunk_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 		if (!entry)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 			return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 		chunk = list_entry(entry, struct sctp_chunk, list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 		if (skb_is_gso(chunk->skb) && skb_is_gso_sctp(chunk->skb)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 			/* GSO-marked skbs but without frags, handle
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 			 * them normally
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 			 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 			if (skb_shinfo(chunk->skb)->frag_list)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 				chunk->head_skb = chunk->skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 			/* skbs with "cover letter" */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 			if (chunk->head_skb && chunk->skb->data_len == chunk->skb->len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 				chunk->skb = skb_shinfo(chunk->skb)->frag_list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 			if (WARN_ON(!chunk->skb)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 				__SCTP_INC_STATS(dev_net(chunk->skb->dev), SCTP_MIB_IN_PKT_DISCARDS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 				sctp_chunk_free(chunk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 				goto next_chunk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 			}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 		if (chunk->asoc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 			sock_rps_save_rxhash(chunk->asoc->base.sk, chunk->skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 		queue->in_progress = chunk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) new_skb:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 		/* This is the first chunk in the packet.  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 		ch = (struct sctp_chunkhdr *)chunk->skb->data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 		chunk->singleton = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 		chunk->data_accepted = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 		chunk->pdiscard = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 		chunk->auth = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 		chunk->has_asconf = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 		chunk->end_of_packet = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 		if (chunk->head_skb) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 			struct sctp_input_cb
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 				*cb = SCTP_INPUT_CB(chunk->skb),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 				*head_cb = SCTP_INPUT_CB(chunk->head_skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 			cb->chunk = head_cb->chunk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 			cb->af = head_cb->af;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 	chunk->chunk_hdr = ch;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 	chunk->chunk_end = ((__u8 *)ch) + SCTP_PAD4(ntohs(ch->length));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 	skb_pull(chunk->skb, sizeof(*ch));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 	chunk->subh.v = NULL; /* Subheader is no longer valid.  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 	if (chunk->chunk_end + sizeof(*ch) <= skb_tail_pointer(chunk->skb)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 		/* This is not a singleton */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 		chunk->singleton = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 	} else if (chunk->chunk_end > skb_tail_pointer(chunk->skb)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 		/* Discard inside state machine. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 		chunk->pdiscard = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 		chunk->chunk_end = skb_tail_pointer(chunk->skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 		/* We are at the end of the packet, so mark the chunk
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 		 * in case we need to send a SACK.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 		 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 		chunk->end_of_packet = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 	pr_debug("+++sctp_inq_pop+++ chunk:%p[%s], length:%d, skb->len:%d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 		 chunk, sctp_cname(SCTP_ST_CHUNK(chunk->chunk_hdr->type)),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 		 ntohs(chunk->chunk_hdr->length), chunk->skb->len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 	return chunk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) /* Set a top-half handler.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228)  * Originally, we the top-half handler was scheduled as a BH.  We now
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229)  * call the handler directly in sctp_inq_push() at a time that
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230)  * we know we are lock safe.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231)  * The intent is that this routine will pull stuff out of the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232)  * inqueue and process it.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) void sctp_inq_set_th_handler(struct sctp_inq *q, work_func_t callback)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 	INIT_WORK(&q->immediate, callback);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) }