// SPDX-License-Identifier: GPL-2.0-or-later/* AF_RXRPC sendmsg() implementation. * * Copyright (C) 2007, 2016 Red Hat, Inc. All Rights Reserved. * Written by David Howells (dhowells@redhat.com) */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt #include <linux/net.h>#include <linux/gfp.h>#include <linux/skbuff.h>#include <linux/export.h>#include <linux/sched/signal.h> #include <net/sock.h>#include <net/af_rxrpc.h>#include "ar-internal.h" /* * Propose an abort to be made in the I/O thread. */bool rxrpc_propose_abort(struct rxrpc_call *call, s32 abort_code, int error, enum rxrpc_abort_reason why){ _enter("{%d},%d,%d,%u", call->debug_id, abort_code, error, why); if (!call->send_abort && !rxrpc_call_is_complete(call)) { call->send_abort_why = why; call->send_abort_err = error; call->send_abort_seq = 0; trace_rxrpc_abort_call(call, abort_code); /* Request abort locklessly vs rxrpc_input_call_event(). */ smp_store_release(&call->send_abort, abort_code); rxrpc_poke_call(call, rxrpc_call_poke_abort); return true; } return false;} /* * Wait for a call to become connected. Interruption here doesn't cause the * call to be aborted. */static int rxrpc_wait_to_be_connected(struct rxrpc_call *call, long *timeo){ DECLARE_WAITQUEUE(myself, current); int ret = 0; _enter("%d", call->debug_id); if (rxrpc_call_state(call) != RXRPC_CALL_CLIENT_AWAIT_CONN) goto no_wait; add_wait_queue_exclusive(&call->waitq, &myself); for (;;) { switch (call->interruptibility) { case RXRPC_INTERRUPTIBLE: case RXRPC_PREINTERRUPTIBLE: set_current_state(TASK_INTERRUPTIBLE); break; case RXRPC_UNINTERRUPTIBLE: default: set_current_state(TASK_UNINTERRUPTIBLE); break; } if (rxrpc_call_state(call) != RXRPC_CALL_CLIENT_AWAIT_CONN) break; if ((call->interruptibility == RXRPC_INTERRUPTIBLE || call->interruptibility == RXRPC_PREINTERRUPTIBLE) && signal_pending(current)) { ret = sock_intr_errno(*timeo); break; } *timeo = schedule_timeout(*timeo); } remove_wait_queue(&call->waitq, &myself); __set_current_state(TASK_RUNNING); no_wait: if (ret == 0 && rxrpc_call_is_complete(call)) ret = call->error; _leave(" = %d", ret); return ret;} /* * Return true if there's sufficient Tx queue space. */static bool rxrpc_check_tx_space(struct rxrpc_call *call, rxrpc_seq_t *_tx_win){ rxrpc_seq_t tx_bottom = READ_ONCE(call->tx_bottom); if (_tx_win) *_tx_win = tx_bottom; return call->send_top - tx_bottom < 256;} /* * Wait for space to appear in the Tx queue or a signal to occur. */static int rxrpc_wait_for_tx_window_intr(struct rxrpc_sock *rx, struct rxrpc_call *call, long *timeo){ for (;;) { set_current_state(TASK_INTERRUPTIBLE); if (rxrpc_check_tx_space(call, NULL)) return 0; if (rxrpc_call_is_complete(call)) return call->error; if (signal_pending(current)) return sock_intr_errno(*timeo); trace_rxrpc_txqueue(call, rxrpc_txqueue_wait); *timeo = schedule_timeout(*timeo); }} /* * Wait for space to appear in the Tx queue uninterruptibly, but with * a timeout of 2*RTT if no progress was made and a signal occurred. */static int rxrpc_wait_for_tx_window_waitall(struct rxrpc_sock *rx, struct rxrpc_call *call){ rxrpc_seq_t tx_start, tx_win; signed long rtt, timeout; rtt = READ_ONCE(call->srtt_us) >> 3; rtt = usecs_to_jiffies(rtt) * 2; if (rtt < 2) rtt = 2; timeout = rtt; tx_start = READ_ONCE(call->tx_bottom); for (;;) { set_current_state(TASK_UNINTERRUPTIBLE); if (rxrpc_check_tx_space(call, &tx_win)) return 0; if (rxrpc_call_is_complete(call)) return call->error; if (timeout == 0 && tx_win == tx_start && signal_pending(current)) return -EINTR; if (tx_win != tx_start) { timeout = rtt; tx_start = tx_win; } trace_rxrpc_txqueue(call, rxrpc_txqueue_wait); timeout = schedule_timeout(timeout); }} /* * Wait for space to appear in the Tx queue uninterruptibly. */static int rxrpc_wait_for_tx_window_nonintr(struct rxrpc_sock *rx, struct rxrpc_call *call, long *timeo){ for (;;) { set_current_state(TASK_UNINTERRUPTIBLE); if (rxrpc_check_tx_space(call, NULL)) return 0; if (rxrpc_call_is_complete(call)) return call->error; trace_rxrpc_txqueue(call, rxrpc_txqueue_wait); *timeo = schedule_timeout(*timeo); }} /* * wait for space to appear in the transmit/ACK window * - caller holds the socket locked */static int rxrpc_wait_for_tx_window(struct rxrpc_sock *rx, struct rxrpc_call *call, long *timeo, bool waitall){ DECLARE_WAITQUEUE(myself, current); int ret; _enter(",{%u,%u,%u}", call->tx_bottom, call->tx_top, call->tx_winsize); add_wait_queue(&call->waitq, &myself); switch (call->interruptibility) { case RXRPC_INTERRUPTIBLE: if (waitall) ret = rxrpc_wait_for_tx_window_waitall(rx, call); else ret = rxrpc_wait_for_tx_window_intr(rx, call, timeo); break; case RXRPC_PREINTERRUPTIBLE: case RXRPC_UNINTERRUPTIBLE: default: ret = rxrpc_wait_for_tx_window_nonintr(rx, call, timeo); break; } remove_wait_queue(&call->waitq, &myself); set_current_state(TASK_RUNNING); _leave(" = %d", ret); return ret;} /* * Notify the owner of the call that the transmit phase is ended and the last * packet has been queued. */static void rxrpc_notify_end_tx(struct rxrpc_sock *rx, struct rxrpc_call *call, rxrpc_notify_end_tx_t notify_end_tx){ if (notify_end_tx) notify_end_tx(&rx->sk, call, call->user_call_ID);} /* * Queue a DATA packet for transmission, set the resend timeout and send * the packet immediately. Returns the error from rxrpc_send_data_packet() * in case the caller wants to do something with it. */static void rxrpc_queue_packet(struct rxrpc_sock *rx, struct rxrpc_call *call, struct rxrpc_txbuf *txb, rxrpc_notify_end_tx_t notify_end_tx){ struct rxrpc_txqueue *sq = call->send_queue; rxrpc_seq_t seq = txb->seq; bool poke, last = txb->flags & RXRPC_LAST_PACKET; int ix = seq & RXRPC_TXQ_MASK; rxrpc_inc_stat(call->rxnet, stat_tx_data); ASSERTCMP(txb->seq, ==, call->send_top + 1); if (last) trace_rxrpc_txqueue(call, rxrpc_txqueue_queue_last); else trace_rxrpc_txqueue(call, rxrpc_txqueue_queue); if (WARN_ON_ONCE(sq->bufs[ix])) trace_rxrpc_tq(call, sq, seq, rxrpc_tq_queue_dup); else trace_rxrpc_tq(call, sq, seq, rxrpc_tq_queue); /* Add the packet to the call's output buffer */ poke = (READ_ONCE(call->tx_bottom) == call->send_top); sq->bufs[ix] = txb; /* Order send_top after the queue->next pointer and txb content. */ smp_store_release(&call->send_top, seq); if (last) { set_bit(RXRPC_CALL_TX_NO_MORE, &call->flags); rxrpc_notify_end_tx(rx, call, notify_end_tx); call->send_queue = NULL; } if (poke) rxrpc_poke_call(call, rxrpc_call_poke_start);} /* * Allocate a new txqueue unit and add it to the transmission queue. */static int rxrpc_alloc_txqueue(struct sock *sk, struct rxrpc_call *call){ struct rxrpc_txqueue *tq; tq = kzalloc_obj(*tq, sk->sk_allocation); if (!tq) return -ENOMEM; tq->xmit_ts_base = KTIME_MIN; for (int i = 0; i < RXRPC_NR_TXQUEUE; i++) tq->segment_xmit_ts[i] = UINT_MAX; if (call->send_queue) { tq->qbase = call->send_top + 1; call->send_queue->next = tq; call->send_queue = tq; } else if (WARN_ON(call->tx_queue)) { kfree(tq); return -ENOMEM; } else { /* We start at seq 1, so pretend seq 0 is hard-acked. */ tq->nr_reported_acks = 1; tq->segment_acked = 1UL; tq->qbase = 0; call->tx_qbase = 0; call->send_queue = tq; call->tx_qtail = tq; call->tx_queue = tq; } trace_rxrpc_tq(call, tq, call->send_top, rxrpc_tq_alloc); return 0;} /* * send data through a socket * - must be called in process context * - The caller holds the call user access mutex, but not the socket lock. */static int rxrpc_send_data(struct rxrpc_sock *rx, struct rxrpc_call *call, struct msghdr *msg, size_t len, rxrpc_notify_end_tx_t notify_end_tx, bool *_dropped_lock){ struct rxrpc_txbuf *txb; struct sock *sk = &rx->sk; enum rxrpc_call_state state; long timeo; bool more = msg->msg_flags & MSG_MORE; int ret, copied = 0; if (test_bit(RXRPC_CALL_TX_NO_MORE, &call->flags)) { trace_rxrpc_abort(call->debug_id, rxrpc_sendmsg_late_send, call->cid, call->call_id, call->rx_consumed, 0, -EPROTO); return -EPROTO; } timeo = sock_sndtimeo(sk, msg->msg_flags & MSG_DONTWAIT); ret = rxrpc_wait_to_be_connected(call, &timeo); if (ret < 0) return ret; if (call->conn->state == RXRPC_CONN_CLIENT_UNSECURED) { ret = rxrpc_init_client_conn_security(call->conn); if (ret < 0) return ret; } /* this should be in poll */ sk_clear_bit(SOCKWQ_ASYNC_NOSPACE, sk); reload: txb = call->tx_pending; call->tx_pending = NULL; if (txb) rxrpc_see_txbuf(txb, rxrpc_txbuf_see_send_more); ret = -EPIPE; if (sk->sk_shutdown & SEND_SHUTDOWN) goto maybe_error; state = rxrpc_call_state(call); ret = -ESHUTDOWN; if (state >= RXRPC_CALL_COMPLETE) goto maybe_error; ret = -EPROTO; if (state != RXRPC_CALL_CLIENT_PRE_SEND && state != RXRPC_CALL_CLIENT_SEND_REQUEST && state != RXRPC_CALL_SERVER_ACK_REQUEST && state != RXRPC_CALL_SERVER_SEND_REPLY) { /* Request phase complete for this client call */ trace_rxrpc_abort(call->debug_id, rxrpc_sendmsg_late_send, call->cid, call->call_id, call->rx_consumed, 0, -EPROTO); goto maybe_error; } ret = -EMSGSIZE; if (call->tx_total_len != -1) { if (len - copied > call->tx_total_len) goto maybe_error; if (!more && len - copied != call->tx_total_len) goto maybe_error; } do { if (!txb) { size_t remain; _debug("alloc"); if (!rxrpc_check_tx_space(call, NULL)) goto wait_for_space; /* See if we need to begin/extend the Tx queue. */ if (!call->send_queue || !((call->send_top + 1) & RXRPC_TXQ_MASK)) { ret = rxrpc_alloc_txqueue(sk, call); if (ret < 0) goto maybe_error; } /* Work out the maximum size of a packet. Assume that * the security header is going to be in the padded * region (enc blocksize), but the trailer is not. */ remain = more ? INT_MAX : msg_data_left(msg); txb = call->conn->security->alloc_txbuf(call, remain, sk->sk_allocation); if (!txb) { ret = -ENOMEM; goto maybe_error; } } _debug("append"); /* append next segment of data to the current buffer */ if (msg_data_left(msg) > 0) { size_t copy = umin(txb->space, msg_data_left(msg)); _debug("add %zu", copy); if (!copy_from_iter_full(txb->data + txb->offset, copy, &msg->msg_iter)) goto efault; _debug("added"); txb->space -= copy; txb->len += copy; txb->offset += copy; copied += copy; if (call->tx_total_len != -1) call->tx_total_len -= copy; } /* check for the far side aborting the call or a network error * occurring */ if (rxrpc_call_is_complete(call)) goto call_terminated; /* add the packet to the send queue if it's now full */ if (!txb->space || (msg_data_left(msg) == 0 && !more)) { if (msg_data_left(msg) == 0 && !more) txb->flags |= RXRPC_LAST_PACKET; ret = call->security->secure_packet(call, txb); if (ret < 0) goto out; rxrpc_queue_packet(rx, call, txb, notify_end_tx); txb = NULL; } } while (msg_data_left(msg) > 0); success: ret = copied; if (rxrpc_call_is_complete(call) && call->error < 0) ret = call->error;out: call->tx_pending = txb; _leave(" = %d", ret); return ret; call_terminated: rxrpc_put_txbuf(txb, rxrpc_txbuf_put_send_aborted); _leave(" = %d", call->error); return call->error; maybe_error: if (copied) goto success; goto out; efault: ret = -EFAULT; goto out; wait_for_space: ret = -EAGAIN; if (msg->msg_flags & MSG_DONTWAIT) goto maybe_error; mutex_unlock(&call->user_mutex); *_dropped_lock = true; ret = rxrpc_wait_for_tx_window(rx, call, &timeo, msg->msg_flags & MSG_WAITALL); if (ret < 0) goto maybe_error; if (call->interruptibility == RXRPC_INTERRUPTIBLE) { if (mutex_lock_interruptible(&call->user_mutex) < 0) { ret = sock_intr_errno(timeo); goto maybe_error; } } else { mutex_lock(&call->user_mutex); } *_dropped_lock = false; goto reload;} /*Lines 1–500 of 877. 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// SPDX-License-Identifier: GPL-2.0-or-later /* AF_RXRPC sendmsg() implementation. * * Copyright (C) 2007, 2016 Red Hat, Inc. All Rights Reserved. * Written by David Howells (dhowells@redhat.com) */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt #include <linux/net.h> #include <linux/gfp.h> #include <linux/skbuff.h> #include <linux/export.h> #include <linux/sched/signal.h> #include <net/sock.h> #include <net/af_rxrpc.h> #include "ar-internal.h" /* * Propose an abort to be made in the I/O thread. */ bool rxrpc_propose_abort(struct rxrpc_call *call, s32 abort_code, int error, enum rxrpc_abort_reason why) { _enter("{%d},%d,%d,%u", call->debug_id, abort_code, error, why); if (!call->send_abort && !rxrpc_call_is_complete(call)) { call->send_abort_why = why; call->send_abort_err = error; call->send_abort_seq = 0; trace_rxrpc_abort_call(call, abort_code); /* Request abort locklessly vs rxrpc_input_call_event(). */ smp_store_release(&call->send_abort, abort_code); rxrpc_poke_call(call, rxrpc_call_poke_abort); return true; } return false; } /* * Wait for a call to become connected. Interruption here doesn't cause the * call to be aborted. */ static int rxrpc_wait_to_be_connected(struct rxrpc_call *call, long *timeo) { DECLARE_WAITQUEUE(myself, current); int ret = 0; _enter("%d", call->debug_id); if (rxrpc_call_state(call) != RXRPC_CALL_CLIENT_AWAIT_CONN) goto no_wait; add_wait_queue_exclusive(&call->waitq, &myself); for (;;) { switch (call->interruptibility) { case RXRPC_INTERRUPTIBLE: case RXRPC_PREINTERRUPTIBLE: set_current_state(TASK_INTERRUPTIBLE); break; case RXRPC_UNINTERRUPTIBLE: default: set_current_state(TASK_UNINTERRUPTIBLE); break; } if (rxrpc_call_state(call) != RXRPC_CALL_CLIENT_AWAIT_CONN) break; if ((call->interruptibility == RXRPC_INTERRUPTIBLE || call->interruptibility == RXRPC_PREINTERRUPTIBLE) && signal_pending(current)) { ret = sock_intr_errno(*timeo); break; } *timeo = schedule_timeout(*timeo); } remove_wait_queue(&call->waitq, &myself); __set_current_state(TASK_RUNNING); no_wait: if (ret == 0 && rxrpc_call_is_complete(call)) ret = call->error; _leave(" = %d", ret); return ret; } /* * Return true if there's sufficient Tx queue space. */ static bool rxrpc_check_tx_space(struct rxrpc_call *call, rxrpc_seq_t *_tx_win) { rxrpc_seq_t tx_bottom = READ_ONCE(call->tx_bottom); if (_tx_win) *_tx_win = tx_bottom; return call->send_top - tx_bottom < 256; } /* * Wait for space to appear in the Tx queue or a signal to occur. */ static int rxrpc_wait_for_tx_window_intr(struct rxrpc_sock *rx, struct rxrpc_call *call, long *timeo) { for (;;) { set_current_state(TASK_INTERRUPTIBLE); if (rxrpc_check_tx_space(call, NULL)) return 0; if (rxrpc_call_is_complete(call)) return call->error; if (signal_pending(current)) return sock_intr_errno(*timeo); trace_rxrpc_txqueue(call, rxrpc_txqueue_wait); *timeo = schedule_timeout(*timeo); } } /* * Wait for space to appear in the Tx queue uninterruptibly, but with * a timeout of 2*RTT if no progress was made and a signal occurred. */ static int rxrpc_wait_for_tx_window_waitall(struct rxrpc_sock *rx, struct rxrpc_call *call) { rxrpc_seq_t tx_start, tx_win; signed long rtt, timeout; rtt = READ_ONCE(call->srtt_us) >> 3; rtt = usecs_to_jiffies(rtt) * 2; if (rtt < 2) rtt = 2; timeout = rtt; tx_start = READ_ONCE(call->tx_bottom); for (;;) { set_current_state(TASK_UNINTERRUPTIBLE); if (rxrpc_check_tx_space(call, &tx_win)) return 0; if (rxrpc_call_is_complete(call)) return call->error; if (timeout == 0 && tx_win == tx_start && signal_pending(current)) return -EINTR; if (tx_win != tx_start) { timeout = rtt; tx_start = tx_win; } trace_rxrpc_txqueue(call, rxrpc_txqueue_wait); timeout = schedule_timeout(timeout); } } /* * Wait for space to appear in the Tx queue uninterruptibly. */ static int rxrpc_wait_for_tx_window_nonintr(struct rxrpc_sock *rx, struct rxrpc_call *call, long *timeo) { for (;;) { set_current_state(TASK_UNINTERRUPTIBLE); if (rxrpc_check_tx_space(call, NULL)) return 0; if (rxrpc_call_is_complete(call)) return call->error; trace_rxrpc_txqueue(call, rxrpc_txqueue_wait); *timeo = schedule_timeout(*timeo); } } /* * wait for space to appear in the transmit/ACK window * - caller holds the socket locked */ static int rxrpc_wait_for_tx_window(struct rxrpc_sock *rx, struct rxrpc_call *call, long *timeo, bool waitall) { DECLARE_WAITQUEUE(myself, current); int ret; _enter(",{%u,%u,%u}", call->tx_bottom, call->tx_top, call->tx_winsize); add_wait_queue(&call->waitq, &myself); switch (call->interruptibility) { case RXRPC_INTERRUPTIBLE: if (waitall) ret = rxrpc_wait_for_tx_window_waitall(rx, call); else ret = rxrpc_wait_for_tx_window_intr(rx, call, timeo); break; case RXRPC_PREINTERRUPTIBLE: case RXRPC_UNINTERRUPTIBLE: default: ret = rxrpc_wait_for_tx_window_nonintr(rx, call, timeo); break; } remove_wait_queue(&call->waitq, &myself); set_current_state(TASK_RUNNING); _leave(" = %d", ret); return ret; } /* * Notify the owner of the call that the transmit phase is ended and the last * packet has been queued. */ static void rxrpc_notify_end_tx(struct rxrpc_sock *rx, struct rxrpc_call *call, rxrpc_notify_end_tx_t notify_end_tx) { if (notify_end_tx) notify_end_tx(&rx->sk, call, call->user_call_ID); } /* * Queue a DATA packet for transmission, set the resend timeout and send * the packet immediately. Returns the error from rxrpc_send_data_packet() * in case the caller wants to do something with it. */ static void rxrpc_queue_packet(struct rxrpc_sock *rx, struct rxrpc_call *call, struct rxrpc_txbuf *txb, rxrpc_notify_end_tx_t notify_end_tx) { struct rxrpc_txqueue *sq = call->send_queue; rxrpc_seq_t seq = txb->seq; bool poke, last = txb->flags & RXRPC_LAST_PACKET; int ix = seq & RXRPC_TXQ_MASK; rxrpc_inc_stat(call->rxnet, stat_tx_data); ASSERTCMP(txb->seq, ==, call->send_top + 1); if (last) trace_rxrpc_txqueue(call, rxrpc_txqueue_queue_last); else trace_rxrpc_txqueue(call, rxrpc_txqueue_queue); if (WARN_ON_ONCE(sq->bufs[ix])) trace_rxrpc_tq(call, sq, seq, rxrpc_tq_queue_dup); else trace_rxrpc_tq(call, sq, seq, rxrpc_tq_queue); /* Add the packet to the call's output buffer */ poke = (READ_ONCE(call->tx_bottom) == call->send_top); sq->bufs[ix] = txb; /* Order send_top after the queue->next pointer and txb content. */ smp_store_release(&call->send_top, seq); if (last) { set_bit(RXRPC_CALL_TX_NO_MORE, &call->flags); rxrpc_notify_end_tx(rx, call, notify_end_tx); call->send_queue = NULL; } if (poke) rxrpc_poke_call(call, rxrpc_call_poke_start); } /* * Allocate a new txqueue unit and add it to the transmission queue. */ static int rxrpc_alloc_txqueue(struct sock *sk, struct rxrpc_call *call) { struct rxrpc_txqueue *tq; tq = kzalloc_obj(*tq, sk->sk_allocation); if (!tq) return -ENOMEM; tq->xmit_ts_base = KTIME_MIN; for (int i = 0; i < RXRPC_NR_TXQUEUE; i++) tq->segment_xmit_ts[i] = UINT_MAX; if (call->send_queue) { tq->qbase = call->send_top + 1; call->send_queue->next = tq; call->send_queue = tq; } else if (WARN_ON(call->tx_queue)) { kfree(tq); return -ENOMEM; } else { /* We start at seq 1, so pretend seq 0 is hard-acked. */ tq->nr_reported_acks = 1; tq->segment_acked = 1UL; tq->qbase = 0; call->tx_qbase = 0; call->send_queue = tq; call->tx_qtail = tq; call->tx_queue = tq; } trace_rxrpc_tq(call, tq, call->send_top, rxrpc_tq_alloc); return 0; } /* * send data through a socket * - must be called in process context * - The caller holds the call user access mutex, but not the socket lock. */ static int rxrpc_send_data(struct rxrpc_sock *rx, struct rxrpc_call *call, struct msghdr *msg, size_t len, rxrpc_notify_end_tx_t notify_end_tx, bool *_dropped_lock) { struct rxrpc_txbuf *txb; struct sock *sk = &rx->sk; enum rxrpc_call_state state; long timeo; bool more = msg->msg_flags & MSG_MORE; int ret, copied = 0; if (test_bit(RXRPC_CALL_TX_NO_MORE, &call->flags)) { trace_rxrpc_abort(call->debug_id, rxrpc_sendmsg_late_send, call->cid, call->call_id, call->rx_consumed, 0, -EPROTO); return -EPROTO; } timeo = sock_sndtimeo(sk, msg->msg_flags & MSG_DONTWAIT); ret = rxrpc_wait_to_be_connected(call, &timeo); if (ret < 0) return ret; if (call->conn->state == RXRPC_CONN_CLIENT_UNSECURED) { ret = rxrpc_init_client_conn_security(call->conn); if (ret < 0) return ret; } /* this should be in poll */ sk_clear_bit(SOCKWQ_ASYNC_NOSPACE, sk); reload: txb = call->tx_pending; call->tx_pending = NULL; if (txb) rxrpc_see_txbuf(txb, rxrpc_txbuf_see_send_more); ret = -EPIPE; if (sk->sk_shutdown & SEND_SHUTDOWN) goto maybe_error; state = rxrpc_call_state(call); ret = -ESHUTDOWN; if (state >= RXRPC_CALL_COMPLETE) goto maybe_error; ret = -EPROTO; if (state != RXRPC_CALL_CLIENT_PRE_SEND && state != RXRPC_CALL_CLIENT_SEND_REQUEST && state != RXRPC_CALL_SERVER_ACK_REQUEST && state != RXRPC_CALL_SERVER_SEND_REPLY) { /* Request phase complete for this client call */ trace_rxrpc_abort(call->debug_id, rxrpc_sendmsg_late_send, call->cid, call->call_id, call->rx_consumed, 0, -EPROTO); goto maybe_error; } ret = -EMSGSIZE; if (call->tx_total_len != -1) { if (len - copied > call->tx_total_len) goto maybe_error; if (!more && len - copied != call->tx_total_len) goto maybe_error; } do { if (!txb) { size_t remain; _debug("alloc"); if (!rxrpc_check_tx_space(call, NULL)) goto wait_for_space; /* See if we need to begin/extend the Tx queue. */ if (!call->send_queue || !((call->send_top + 1) & RXRPC_TXQ_MASK)) { ret = rxrpc_alloc_txqueue(sk, call); if (ret < 0) goto maybe_error; } /* Work out the maximum size of a packet. Assume that * the security header is going to be in the padded * region (enc blocksize), but the trailer is not. */ remain = more ? INT_MAX : msg_data_left(msg); txb = call->conn->security->alloc_txbuf(call, remain, sk->sk_allocation); if (!txb) { ret = -ENOMEM; goto maybe_error; } } _debug("append"); /* append next segment of data to the current buffer */ if (msg_data_left(msg) > 0) { size_t copy = umin(txb->space, msg_data_left(msg)); _debug("add %zu", copy); if (!copy_from_iter_full(txb->data + txb->offset, copy, &msg->msg_iter)) goto efault; _debug("added"); txb->space -= copy; txb->len += copy; txb->offset += copy; copied += copy; if (call->tx_total_len != -1) call->tx_total_len -= copy; } /* check for the far side aborting the call or a network error * occurring */ if (rxrpc_call_is_complete(call)) goto call_terminated; /* add the packet to the send queue if it's now full */ if (!txb->space || (msg_data_left(msg) == 0 && !more)) { if (msg_data_left(msg) == 0 && !more) txb->flags |= RXRPC_LAST_PACKET; ret = call->security->secure_packet(call, txb); if (ret < 0) goto out; rxrpc_queue_packet(rx, call, txb, notify_end_tx); txb = NULL; } } while (msg_data_left(msg) > 0); success: ret = copied; if (rxrpc_call_is_complete(call) && call->error < 0) ret = call->error; out: call->tx_pending = txb; _leave(" = %d", ret); return ret; call_terminated: rxrpc_put_txbuf(txb, rxrpc_txbuf_put_send_aborted); _leave(" = %d", call->error); return call->error; maybe_error: if (copied) goto success; goto out; efault: ret = -EFAULT; goto out; wait_for_space: ret = -EAGAIN; if (msg->msg_flags & MSG_DONTWAIT) goto maybe_error; mutex_unlock(&call->user_mutex); *_dropped_lock = true; ret = rxrpc_wait_for_tx_window(rx, call, &timeo, msg->msg_flags & MSG_WAITALL); if (ret < 0) goto maybe_error; if (call->interruptibility == RXRPC_INTERRUPTIBLE) { if (mutex_lock_interruptible(&call->user_mutex) < 0) { ret = sock_intr_errno(timeo); goto maybe_error; } } else { mutex_lock(&call->user_mutex); } *_dropped_lock = false; goto reload; } /*