^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) /* AF_RXRPC sendmsg() implementation.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * Copyright (C) 2007, 2016 Red Hat, Inc. All Rights Reserved.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Written by David Howells (dhowells@redhat.com)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/net.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/gfp.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/skbuff.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/export.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/sched/signal.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <net/sock.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <net/af_rxrpc.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include "ar-internal.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) * Return true if there's sufficient Tx queue space.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) static bool rxrpc_check_tx_space(struct rxrpc_call *call, rxrpc_seq_t *_tx_win)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) unsigned int win_size =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) min_t(unsigned int, call->tx_winsize,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) call->cong_cwnd + call->cong_extra);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) rxrpc_seq_t tx_win = READ_ONCE(call->tx_hard_ack);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) if (_tx_win)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) *_tx_win = tx_win;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) return call->tx_top - tx_win < win_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) * Wait for space to appear in the Tx queue or a signal to occur.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) static int rxrpc_wait_for_tx_window_intr(struct rxrpc_sock *rx,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) struct rxrpc_call *call,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) long *timeo)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) for (;;) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) set_current_state(TASK_INTERRUPTIBLE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) if (rxrpc_check_tx_space(call, NULL))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) if (call->state >= RXRPC_CALL_COMPLETE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) return call->error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) if (signal_pending(current))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) return sock_intr_errno(*timeo);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) trace_rxrpc_transmit(call, rxrpc_transmit_wait);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) mutex_unlock(&call->user_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) *timeo = schedule_timeout(*timeo);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) if (mutex_lock_interruptible(&call->user_mutex) < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) return sock_intr_errno(*timeo);
^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) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) * Wait for space to appear in the Tx queue uninterruptibly, but with
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) * a timeout of 2*RTT if no progress was made and a signal occurred.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) static int rxrpc_wait_for_tx_window_waitall(struct rxrpc_sock *rx,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) struct rxrpc_call *call)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) rxrpc_seq_t tx_start, tx_win;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) signed long rtt, timeout;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) rtt = READ_ONCE(call->peer->srtt_us) >> 3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) rtt = usecs_to_jiffies(rtt) * 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) if (rtt < 2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) rtt = 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) timeout = rtt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) tx_start = READ_ONCE(call->tx_hard_ack);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) for (;;) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) set_current_state(TASK_UNINTERRUPTIBLE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) tx_win = READ_ONCE(call->tx_hard_ack);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) if (rxrpc_check_tx_space(call, &tx_win))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) if (call->state >= RXRPC_CALL_COMPLETE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) return call->error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) if (timeout == 0 &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) tx_win == tx_start && signal_pending(current))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) return -EINTR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) if (tx_win != tx_start) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) timeout = rtt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) tx_start = tx_win;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) trace_rxrpc_transmit(call, rxrpc_transmit_wait);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) timeout = schedule_timeout(timeout);
^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)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) * Wait for space to appear in the Tx queue uninterruptibly.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) static int rxrpc_wait_for_tx_window_nonintr(struct rxrpc_sock *rx,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) struct rxrpc_call *call,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) long *timeo)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) for (;;) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) set_current_state(TASK_UNINTERRUPTIBLE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) if (rxrpc_check_tx_space(call, NULL))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) if (call->state >= RXRPC_CALL_COMPLETE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) return call->error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) trace_rxrpc_transmit(call, rxrpc_transmit_wait);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) *timeo = schedule_timeout(*timeo);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) * wait for space to appear in the transmit/ACK window
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) * - caller holds the socket locked
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) static int rxrpc_wait_for_tx_window(struct rxrpc_sock *rx,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) struct rxrpc_call *call,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) long *timeo,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) bool waitall)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) DECLARE_WAITQUEUE(myself, current);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) _enter(",{%u,%u,%u}",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) call->tx_hard_ack, call->tx_top, call->tx_winsize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) add_wait_queue(&call->waitq, &myself);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) switch (call->interruptibility) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) case RXRPC_INTERRUPTIBLE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) if (waitall)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) ret = rxrpc_wait_for_tx_window_waitall(rx, call);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) ret = rxrpc_wait_for_tx_window_intr(rx, call, timeo);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) case RXRPC_PREINTERRUPTIBLE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) case RXRPC_UNINTERRUPTIBLE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) ret = rxrpc_wait_for_tx_window_nonintr(rx, call, timeo);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) remove_wait_queue(&call->waitq, &myself);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) set_current_state(TASK_RUNNING);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) _leave(" = %d", ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) * Schedule an instant Tx resend.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) static inline void rxrpc_instant_resend(struct rxrpc_call *call, int ix)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) spin_lock_bh(&call->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) if (call->state < RXRPC_CALL_COMPLETE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) call->rxtx_annotations[ix] =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) (call->rxtx_annotations[ix] & RXRPC_TX_ANNO_LAST) |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) RXRPC_TX_ANNO_RETRANS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) if (!test_and_set_bit(RXRPC_CALL_EV_RESEND, &call->events))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) rxrpc_queue_call(call);
^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) spin_unlock_bh(&call->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) * Notify the owner of the call that the transmit phase is ended and the last
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) * packet has been queued.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) static void rxrpc_notify_end_tx(struct rxrpc_sock *rx, struct rxrpc_call *call,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) rxrpc_notify_end_tx_t notify_end_tx)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) if (notify_end_tx)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) notify_end_tx(&rx->sk, call, call->user_call_ID);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) * Queue a DATA packet for transmission, set the resend timeout and send
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) * the packet immediately. Returns the error from rxrpc_send_data_packet()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) * in case the caller wants to do something with it.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) static int rxrpc_queue_packet(struct rxrpc_sock *rx, struct rxrpc_call *call,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) struct sk_buff *skb, bool last,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) rxrpc_notify_end_tx_t notify_end_tx)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) struct rxrpc_skb_priv *sp = rxrpc_skb(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) unsigned long now;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) rxrpc_seq_t seq = sp->hdr.seq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) int ret, ix;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) u8 annotation = RXRPC_TX_ANNO_UNACK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) _net("queue skb %p [%d]", skb, seq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) ASSERTCMP(seq, ==, call->tx_top + 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) if (last)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) annotation |= RXRPC_TX_ANNO_LAST;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) /* We have to set the timestamp before queueing as the retransmit
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) * algorithm can see the packet as soon as we queue it.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) skb->tstamp = ktime_get_real();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) ix = seq & RXRPC_RXTX_BUFF_MASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) rxrpc_get_skb(skb, rxrpc_skb_got);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) call->rxtx_annotations[ix] = annotation;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) smp_wmb();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) call->rxtx_buffer[ix] = skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) call->tx_top = seq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) if (last)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) trace_rxrpc_transmit(call, rxrpc_transmit_queue_last);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) trace_rxrpc_transmit(call, rxrpc_transmit_queue);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) if (last || call->state == RXRPC_CALL_SERVER_ACK_REQUEST) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) _debug("________awaiting reply/ACK__________");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) write_lock_bh(&call->state_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) switch (call->state) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) case RXRPC_CALL_CLIENT_SEND_REQUEST:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) call->state = RXRPC_CALL_CLIENT_AWAIT_REPLY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) rxrpc_notify_end_tx(rx, call, notify_end_tx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) case RXRPC_CALL_SERVER_ACK_REQUEST:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) call->state = RXRPC_CALL_SERVER_SEND_REPLY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) now = jiffies;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) WRITE_ONCE(call->ack_at, now + MAX_JIFFY_OFFSET);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) if (call->ackr_reason == RXRPC_ACK_DELAY)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) call->ackr_reason = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) trace_rxrpc_timer(call, rxrpc_timer_init_for_send_reply, now);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) if (!last)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) fallthrough;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) case RXRPC_CALL_SERVER_SEND_REPLY:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) call->state = RXRPC_CALL_SERVER_AWAIT_ACK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) rxrpc_notify_end_tx(rx, call, notify_end_tx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) write_unlock_bh(&call->state_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) if (seq == 1 && rxrpc_is_client_call(call))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) rxrpc_expose_client_call(call);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) ret = rxrpc_send_data_packet(call, skb, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) switch (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) case -ENETUNREACH:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) case -EHOSTUNREACH:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) case -ECONNREFUSED:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) rxrpc_set_call_completion(call, RXRPC_CALL_LOCAL_ERROR,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 0, ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) _debug("need instant resend %d", ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) rxrpc_instant_resend(call, ix);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) unsigned long now = jiffies;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) unsigned long resend_at = now + call->peer->rto_j;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) WRITE_ONCE(call->resend_at, resend_at);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) rxrpc_reduce_call_timer(call, resend_at, now,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) rxrpc_timer_set_for_send);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) rxrpc_free_skb(skb, rxrpc_skb_freed);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) _leave(" = %d", ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) * send data through a socket
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) * - must be called in process context
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) * - The caller holds the call user access mutex, but not the socket lock.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) static int rxrpc_send_data(struct rxrpc_sock *rx,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) struct rxrpc_call *call,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) struct msghdr *msg, size_t len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) rxrpc_notify_end_tx_t notify_end_tx)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) struct rxrpc_skb_priv *sp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) struct sk_buff *skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) struct sock *sk = &rx->sk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) long timeo;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) bool more;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) int ret, copied;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) timeo = sock_sndtimeo(sk, msg->msg_flags & MSG_DONTWAIT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) /* this should be in poll */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) sk_clear_bit(SOCKWQ_ASYNC_NOSPACE, sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) if (sk->sk_shutdown & SEND_SHUTDOWN)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) return -EPIPE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) more = msg->msg_flags & MSG_MORE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) if (call->tx_total_len != -1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) if (len > call->tx_total_len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) return -EMSGSIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) if (!more && len != call->tx_total_len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) return -EMSGSIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) skb = call->tx_pending;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) call->tx_pending = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) rxrpc_see_skb(skb, rxrpc_skb_seen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) copied = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) do {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) /* Check to see if there's a ping ACK to reply to. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) if (call->ackr_reason == RXRPC_ACK_PING_RESPONSE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) rxrpc_send_ack_packet(call, false, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) if (!skb) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) size_t size, chunk, max, space;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) _debug("alloc");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) if (!rxrpc_check_tx_space(call, NULL)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) ret = -EAGAIN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) if (msg->msg_flags & MSG_DONTWAIT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) goto maybe_error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) ret = rxrpc_wait_for_tx_window(rx, call,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) &timeo,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) msg->msg_flags & MSG_WAITALL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) goto maybe_error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) max = RXRPC_JUMBO_DATALEN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) max -= call->conn->security_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) max &= ~(call->conn->size_align - 1UL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) chunk = max;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) if (chunk > msg_data_left(msg) && !more)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) chunk = msg_data_left(msg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) space = chunk + call->conn->size_align;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) space &= ~(call->conn->size_align - 1UL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) size = space + call->conn->security_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) _debug("SIZE: %zu/%zu/%zu", chunk, space, size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) /* create a buffer that we can retain until it's ACK'd */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) skb = sock_alloc_send_skb(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) sk, size, msg->msg_flags & MSG_DONTWAIT, &ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) if (!skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) goto maybe_error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) sp = rxrpc_skb(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) sp->rx_flags |= RXRPC_SKB_TX_BUFFER;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) rxrpc_new_skb(skb, rxrpc_skb_new);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) _debug("ALLOC SEND %p", skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) ASSERTCMP(skb->mark, ==, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) _debug("HS: %u", call->conn->security_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) skb_reserve(skb, call->conn->security_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) skb->len += call->conn->security_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) sp->remain = chunk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) if (sp->remain > skb_tailroom(skb))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) sp->remain = skb_tailroom(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) _net("skb: hr %d, tr %d, hl %d, rm %d",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) skb_headroom(skb),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) skb_tailroom(skb),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) skb_headlen(skb),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) sp->remain);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) skb->ip_summed = CHECKSUM_UNNECESSARY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) _debug("append");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) sp = rxrpc_skb(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) /* append next segment of data to the current buffer */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) if (msg_data_left(msg) > 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) int copy = skb_tailroom(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) ASSERTCMP(copy, >, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) if (copy > msg_data_left(msg))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) copy = msg_data_left(msg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) if (copy > sp->remain)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) copy = sp->remain;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) _debug("add");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) ret = skb_add_data(skb, &msg->msg_iter, copy);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) _debug("added");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) goto efault;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) sp->remain -= copy;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) skb->mark += copy;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) copied += copy;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) if (call->tx_total_len != -1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) call->tx_total_len -= copy;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) /* check for the far side aborting the call or a network error
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) * occurring */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) if (call->state == RXRPC_CALL_COMPLETE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) goto call_terminated;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) /* add the packet to the send queue if it's now full */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) if (sp->remain <= 0 ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) (msg_data_left(msg) == 0 && !more)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) struct rxrpc_connection *conn = call->conn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) uint32_t seq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) size_t pad;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) /* pad out if we're using security */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) if (conn->security_ix) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) pad = conn->security_size + skb->mark;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) pad = conn->size_align - pad;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) pad &= conn->size_align - 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) _debug("pad %zu", pad);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) if (pad)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) skb_put_zero(skb, pad);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) seq = call->tx_top + 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) sp->hdr.seq = seq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) sp->hdr._rsvd = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) sp->hdr.flags = conn->out_clientflag;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) if (msg_data_left(msg) == 0 && !more)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) sp->hdr.flags |= RXRPC_LAST_PACKET;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) else if (call->tx_top - call->tx_hard_ack <
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) call->tx_winsize)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) sp->hdr.flags |= RXRPC_MORE_PACKETS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) ret = call->security->secure_packet(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) call, skb, skb->mark, skb->head);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) ret = rxrpc_queue_packet(rx, call, skb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) !msg_data_left(msg) && !more,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) notify_end_tx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) /* Should check for failure here */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) skb = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) } while (msg_data_left(msg) > 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) success:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) ret = copied;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) call->tx_pending = skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) _leave(" = %d", ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) call_terminated:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) rxrpc_free_skb(skb, rxrpc_skb_freed);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) _leave(" = %d", call->error);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) return call->error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) maybe_error:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) if (copied)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) goto success;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) efault:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) ret = -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) * extract control messages from the sendmsg() control buffer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) static int rxrpc_sendmsg_cmsg(struct msghdr *msg, struct rxrpc_send_params *p)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) struct cmsghdr *cmsg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) bool got_user_ID = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) int len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) if (msg->msg_controllen == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) for_each_cmsghdr(cmsg, msg) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) if (!CMSG_OK(msg, cmsg))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) len = cmsg->cmsg_len - sizeof(struct cmsghdr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) _debug("CMSG %d, %d, %d",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) cmsg->cmsg_level, cmsg->cmsg_type, len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) if (cmsg->cmsg_level != SOL_RXRPC)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) switch (cmsg->cmsg_type) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) case RXRPC_USER_CALL_ID:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) if (msg->msg_flags & MSG_CMSG_COMPAT) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) if (len != sizeof(u32))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) p->call.user_call_ID = *(u32 *)CMSG_DATA(cmsg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) if (len != sizeof(unsigned long))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) p->call.user_call_ID = *(unsigned long *)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) CMSG_DATA(cmsg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) got_user_ID = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) case RXRPC_ABORT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) if (p->command != RXRPC_CMD_SEND_DATA)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) p->command = RXRPC_CMD_SEND_ABORT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) if (len != sizeof(p->abort_code))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) p->abort_code = *(unsigned int *)CMSG_DATA(cmsg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) if (p->abort_code == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) case RXRPC_CHARGE_ACCEPT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) if (p->command != RXRPC_CMD_SEND_DATA)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) p->command = RXRPC_CMD_CHARGE_ACCEPT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) if (len != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541) case RXRPC_EXCLUSIVE_CALL:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) p->exclusive = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) if (len != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) case RXRPC_UPGRADE_SERVICE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) p->upgrade = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) if (len != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) case RXRPC_TX_LENGTH:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) if (p->call.tx_total_len != -1 || len != sizeof(__s64))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) p->call.tx_total_len = *(__s64 *)CMSG_DATA(cmsg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557) if (p->call.tx_total_len < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561) case RXRPC_SET_CALL_TIMEOUT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562) if (len & 3 || len < 4 || len > 12)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) memcpy(&p->call.timeouts, CMSG_DATA(cmsg), len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565) p->call.nr_timeouts = len / 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566) if (p->call.timeouts.hard > INT_MAX / HZ)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567) return -ERANGE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568) if (p->call.nr_timeouts >= 2 && p->call.timeouts.idle > 60 * 60 * 1000)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569) return -ERANGE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570) if (p->call.nr_timeouts >= 3 && p->call.timeouts.normal > 60 * 60 * 1000)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571) return -ERANGE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579) if (!got_user_ID)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) if (p->call.tx_total_len != -1 && p->command != RXRPC_CMD_SEND_DATA)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583) _leave(" = 0");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588) * Create a new client call for sendmsg().
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589) * - Called with the socket lock held, which it must release.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590) * - If it returns a call, the call's lock will need releasing by the caller.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592) static struct rxrpc_call *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593) rxrpc_new_client_call_for_sendmsg(struct rxrpc_sock *rx, struct msghdr *msg,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594) struct rxrpc_send_params *p)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595) __releases(&rx->sk.sk_lock.slock)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596) __acquires(&call->user_mutex)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598) struct rxrpc_conn_parameters cp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599) struct rxrpc_call *call;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600) struct key *key;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602) DECLARE_SOCKADDR(struct sockaddr_rxrpc *, srx, msg->msg_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604) _enter("");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606) if (!msg->msg_name) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607) release_sock(&rx->sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608) return ERR_PTR(-EDESTADDRREQ);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611) key = rx->key;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612) if (key && !rx->key->payload.data[0])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613) key = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615) memset(&cp, 0, sizeof(cp));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616) cp.local = rx->local;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617) cp.key = rx->key;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618) cp.security_level = rx->min_sec_level;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619) cp.exclusive = rx->exclusive | p->exclusive;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620) cp.upgrade = p->upgrade;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621) cp.service_id = srx->srx_service;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622) call = rxrpc_new_client_call(rx, &cp, srx, &p->call, GFP_KERNEL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623) atomic_inc_return(&rxrpc_debug_id));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624) /* The socket is now unlocked */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 626) rxrpc_put_peer(cp.peer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 627) _leave(" = %p\n", call);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 628) return call;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 629) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 630)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 631) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 632) * send a message forming part of a client call through an RxRPC socket
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 633) * - caller holds the socket locked
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 634) * - the socket may be either a client socket or a server socket
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 635) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 636) int rxrpc_do_sendmsg(struct rxrpc_sock *rx, struct msghdr *msg, size_t len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 637) __releases(&rx->sk.sk_lock.slock)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 638) __releases(&call->user_mutex)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 639) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 640) enum rxrpc_call_state state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 641) struct rxrpc_call *call;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 642) unsigned long now, j;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 643) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 644)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 645) struct rxrpc_send_params p = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 646) .call.tx_total_len = -1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 647) .call.user_call_ID = 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 648) .call.nr_timeouts = 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 649) .call.interruptibility = RXRPC_INTERRUPTIBLE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 650) .abort_code = 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 651) .command = RXRPC_CMD_SEND_DATA,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 652) .exclusive = false,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 653) .upgrade = false,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 654) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 655)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 656) _enter("");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 657)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 658) ret = rxrpc_sendmsg_cmsg(msg, &p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 659) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 660) goto error_release_sock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 661)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 662) if (p.command == RXRPC_CMD_CHARGE_ACCEPT) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 663) ret = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 664) if (rx->sk.sk_state != RXRPC_SERVER_LISTENING)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 665) goto error_release_sock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 666) ret = rxrpc_user_charge_accept(rx, p.call.user_call_ID);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 667) goto error_release_sock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 668) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 669)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 670) call = rxrpc_find_call_by_user_ID(rx, p.call.user_call_ID);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 671) if (!call) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 672) ret = -EBADSLT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 673) if (p.command != RXRPC_CMD_SEND_DATA)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 674) goto error_release_sock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 675) call = rxrpc_new_client_call_for_sendmsg(rx, msg, &p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 676) /* The socket is now unlocked... */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 677) if (IS_ERR(call))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 678) return PTR_ERR(call);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 679) /* ... and we have the call lock. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 680) ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 681) if (READ_ONCE(call->state) == RXRPC_CALL_COMPLETE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 682) goto out_put_unlock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 683) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 684) switch (READ_ONCE(call->state)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 685) case RXRPC_CALL_UNINITIALISED:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 686) case RXRPC_CALL_CLIENT_AWAIT_CONN:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 687) case RXRPC_CALL_SERVER_PREALLOC:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 688) case RXRPC_CALL_SERVER_SECURING:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 689) rxrpc_put_call(call, rxrpc_call_put);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 690) ret = -EBUSY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 691) goto error_release_sock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 692) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 693) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 694) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 695)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 696) ret = mutex_lock_interruptible(&call->user_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 697) release_sock(&rx->sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 698) if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 699) ret = -ERESTARTSYS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 700) goto error_put;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 701) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 702)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 703) if (p.call.tx_total_len != -1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 704) ret = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 705) if (call->tx_total_len != -1 ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 706) call->tx_pending ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 707) call->tx_top != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 708) goto error_put;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 709) call->tx_total_len = p.call.tx_total_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 710) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 711) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 712)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 713) switch (p.call.nr_timeouts) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 714) case 3:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 715) j = msecs_to_jiffies(p.call.timeouts.normal);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 716) if (p.call.timeouts.normal > 0 && j == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 717) j = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 718) WRITE_ONCE(call->next_rx_timo, j);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 719) fallthrough;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 720) case 2:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 721) j = msecs_to_jiffies(p.call.timeouts.idle);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 722) if (p.call.timeouts.idle > 0 && j == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 723) j = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 724) WRITE_ONCE(call->next_req_timo, j);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 725) fallthrough;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 726) case 1:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 727) if (p.call.timeouts.hard > 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 728) j = msecs_to_jiffies(p.call.timeouts.hard);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 729) now = jiffies;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 730) j += now;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 731) WRITE_ONCE(call->expect_term_by, j);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 732) rxrpc_reduce_call_timer(call, j, now,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 733) rxrpc_timer_set_for_hard);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 734) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 735) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 736) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 737)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 738) state = READ_ONCE(call->state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 739) _debug("CALL %d USR %lx ST %d on CONN %p",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 740) call->debug_id, call->user_call_ID, state, call->conn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 741)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 742) if (state >= RXRPC_CALL_COMPLETE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 743) /* it's too late for this call */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 744) ret = -ESHUTDOWN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 745) } else if (p.command == RXRPC_CMD_SEND_ABORT) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 746) ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 747) if (rxrpc_abort_call("CMD", call, 0, p.abort_code, -ECONNABORTED))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 748) ret = rxrpc_send_abort_packet(call);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 749) } else if (p.command != RXRPC_CMD_SEND_DATA) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 750) ret = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 751) } else if (rxrpc_is_client_call(call) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 752) state != RXRPC_CALL_CLIENT_SEND_REQUEST) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 753) /* request phase complete for this client call */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 754) ret = -EPROTO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 755) } else if (rxrpc_is_service_call(call) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 756) state != RXRPC_CALL_SERVER_ACK_REQUEST &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 757) state != RXRPC_CALL_SERVER_SEND_REPLY) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 758) /* Reply phase not begun or not complete for service call. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 759) ret = -EPROTO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 760) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 761) ret = rxrpc_send_data(rx, call, msg, len, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 762) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 763)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 764) out_put_unlock:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 765) mutex_unlock(&call->user_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 766) error_put:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 767) rxrpc_put_call(call, rxrpc_call_put);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 768) _leave(" = %d", ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 769) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 770)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 771) error_release_sock:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 772) release_sock(&rx->sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 773) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 774) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 775)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 776) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 777) * rxrpc_kernel_send_data - Allow a kernel service to send data on a call
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 778) * @sock: The socket the call is on
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 779) * @call: The call to send data through
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 780) * @msg: The data to send
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 781) * @len: The amount of data to send
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 782) * @notify_end_tx: Notification that the last packet is queued.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 783) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 784) * Allow a kernel service to send data on a call. The call must be in an state
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 785) * appropriate to sending data. No control data should be supplied in @msg,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 786) * nor should an address be supplied. MSG_MORE should be flagged if there's
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 787) * more data to come, otherwise this data will end the transmission phase.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 788) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 789) int rxrpc_kernel_send_data(struct socket *sock, struct rxrpc_call *call,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 790) struct msghdr *msg, size_t len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 791) rxrpc_notify_end_tx_t notify_end_tx)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 792) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 793) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 794)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 795) _enter("{%d,%s},", call->debug_id, rxrpc_call_states[call->state]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 796)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 797) ASSERTCMP(msg->msg_name, ==, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 798) ASSERTCMP(msg->msg_control, ==, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 799)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 800) mutex_lock(&call->user_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 801)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 802) _debug("CALL %d USR %lx ST %d on CONN %p",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 803) call->debug_id, call->user_call_ID, call->state, call->conn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 804)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 805) switch (READ_ONCE(call->state)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 806) case RXRPC_CALL_CLIENT_SEND_REQUEST:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 807) case RXRPC_CALL_SERVER_ACK_REQUEST:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 808) case RXRPC_CALL_SERVER_SEND_REPLY:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 809) ret = rxrpc_send_data(rxrpc_sk(sock->sk), call, msg, len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 810) notify_end_tx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 811) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 812) case RXRPC_CALL_COMPLETE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 813) read_lock_bh(&call->state_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 814) ret = call->error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 815) read_unlock_bh(&call->state_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 816) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 817) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 818) /* Request phase complete for this client call */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 819) trace_rxrpc_rx_eproto(call, 0, tracepoint_string("late_send"));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 820) ret = -EPROTO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 821) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 822) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 823)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 824) mutex_unlock(&call->user_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 825) _leave(" = %d", ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 826) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 827) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 828) EXPORT_SYMBOL(rxrpc_kernel_send_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 829)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 830) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 831) * rxrpc_kernel_abort_call - Allow a kernel service to abort a call
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 832) * @sock: The socket the call is on
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 833) * @call: The call to be aborted
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 834) * @abort_code: The abort code to stick into the ABORT packet
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 835) * @error: Local error value
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 836) * @why: 3-char string indicating why.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 837) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 838) * Allow a kernel service to abort a call, if it's still in an abortable state
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 839) * and return true if the call was aborted, false if it was already complete.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 840) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 841) bool rxrpc_kernel_abort_call(struct socket *sock, struct rxrpc_call *call,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 842) u32 abort_code, int error, const char *why)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 843) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 844) bool aborted;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 845)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 846) _enter("{%d},%d,%d,%s", call->debug_id, abort_code, error, why);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 847)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 848) mutex_lock(&call->user_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 849)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 850) aborted = rxrpc_abort_call(why, call, 0, abort_code, error);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 851) if (aborted)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 852) rxrpc_send_abort_packet(call);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 853)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 854) mutex_unlock(&call->user_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 855) return aborted;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 856) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 857) EXPORT_SYMBOL(rxrpc_kernel_abort_call);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 858)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 859) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 860) * rxrpc_kernel_set_tx_length - Set the total Tx length on a call
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 861) * @sock: The socket the call is on
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 862) * @call: The call to be informed
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 863) * @tx_total_len: The amount of data to be transmitted for this call
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 864) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 865) * Allow a kernel service to set the total transmit length on a call. This
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 866) * allows buffer-to-packet encrypt-and-copy to be performed.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 867) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 868) * This function is primarily for use for setting the reply length since the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 869) * request length can be set when beginning the call.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 870) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 871) void rxrpc_kernel_set_tx_length(struct socket *sock, struct rxrpc_call *call,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 872) s64 tx_total_len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 873) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 874) WARN_ON(call->tx_total_len != -1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 875) call->tx_total_len = tx_total_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 876) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 877) EXPORT_SYMBOL(rxrpc_kernel_set_tx_length);
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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