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-rw-r--r--net/rxrpc/output.c630
1 files changed, 0 insertions, 630 deletions
diff --git a/net/rxrpc/output.c b/net/rxrpc/output.c
index 817ae801e769..5b5508f6fc2a 100644
--- a/net/rxrpc/output.c
+++ b/net/rxrpc/output.c
@@ -14,299 +14,12 @@
#include <linux/net.h>
#include <linux/gfp.h>
#include <linux/skbuff.h>
-#include <linux/circ_buf.h>
#include <linux/export.h>
#include <net/sock.h>
#include <net/af_rxrpc.h>
#include "ar-internal.h"
/*
- * Time till packet resend (in jiffies).
- */
-unsigned int rxrpc_resend_timeout = 4 * HZ;
-
-static int rxrpc_send_data(struct rxrpc_sock *rx,
- struct rxrpc_call *call,
- struct msghdr *msg, size_t len);
-
-/*
- * extract control messages from the sendmsg() control buffer
- */
-static int rxrpc_sendmsg_cmsg(struct msghdr *msg,
- unsigned long *user_call_ID,
- enum rxrpc_command *command,
- u32 *abort_code,
- bool *_exclusive)
-{
- struct cmsghdr *cmsg;
- bool got_user_ID = false;
- int len;
-
- *command = RXRPC_CMD_SEND_DATA;
-
- if (msg->msg_controllen == 0)
- return -EINVAL;
-
- for_each_cmsghdr(cmsg, msg) {
- if (!CMSG_OK(msg, cmsg))
- return -EINVAL;
-
- len = cmsg->cmsg_len - CMSG_ALIGN(sizeof(struct cmsghdr));
- _debug("CMSG %d, %d, %d",
- cmsg->cmsg_level, cmsg->cmsg_type, len);
-
- if (cmsg->cmsg_level != SOL_RXRPC)
- continue;
-
- switch (cmsg->cmsg_type) {
- case RXRPC_USER_CALL_ID:
- if (msg->msg_flags & MSG_CMSG_COMPAT) {
- if (len != sizeof(u32))
- return -EINVAL;
- *user_call_ID = *(u32 *) CMSG_DATA(cmsg);
- } else {
- if (len != sizeof(unsigned long))
- return -EINVAL;
- *user_call_ID = *(unsigned long *)
- CMSG_DATA(cmsg);
- }
- _debug("User Call ID %lx", *user_call_ID);
- got_user_ID = true;
- break;
-
- case RXRPC_ABORT:
- if (*command != RXRPC_CMD_SEND_DATA)
- return -EINVAL;
- *command = RXRPC_CMD_SEND_ABORT;
- if (len != sizeof(*abort_code))
- return -EINVAL;
- *abort_code = *(unsigned int *) CMSG_DATA(cmsg);
- _debug("Abort %x", *abort_code);
- if (*abort_code == 0)
- return -EINVAL;
- break;
-
- case RXRPC_ACCEPT:
- if (*command != RXRPC_CMD_SEND_DATA)
- return -EINVAL;
- *command = RXRPC_CMD_ACCEPT;
- if (len != 0)
- return -EINVAL;
- break;
-
- case RXRPC_EXCLUSIVE_CALL:
- *_exclusive = true;
- if (len != 0)
- return -EINVAL;
- break;
- default:
- return -EINVAL;
- }
- }
-
- if (!got_user_ID)
- return -EINVAL;
- _leave(" = 0");
- return 0;
-}
-
-/*
- * abort a call, sending an ABORT packet to the peer
- */
-static void rxrpc_send_abort(struct rxrpc_call *call, u32 abort_code)
-{
- if (call->state >= RXRPC_CALL_COMPLETE)
- return;
-
- write_lock_bh(&call->state_lock);
-
- if (__rxrpc_abort_call(call, abort_code, ECONNABORTED)) {
- del_timer_sync(&call->resend_timer);
- del_timer_sync(&call->ack_timer);
- clear_bit(RXRPC_CALL_EV_RESEND_TIMER, &call->events);
- clear_bit(RXRPC_CALL_EV_ACK, &call->events);
- clear_bit(RXRPC_CALL_RUN_RTIMER, &call->flags);
- rxrpc_queue_call(call);
- }
-
- write_unlock_bh(&call->state_lock);
-}
-
-/*
- * Create a new client call for sendmsg().
- */
-static struct rxrpc_call *
-rxrpc_new_client_call_for_sendmsg(struct rxrpc_sock *rx, struct msghdr *msg,
- unsigned long user_call_ID, bool exclusive)
-{
- struct rxrpc_conn_parameters cp;
- struct rxrpc_call *call;
- struct key *key;
-
- DECLARE_SOCKADDR(struct sockaddr_rxrpc *, srx, msg->msg_name);
-
- _enter("");
-
- if (!msg->msg_name)
- return ERR_PTR(-EDESTADDRREQ);
-
- key = rx->key;
- if (key && !rx->key->payload.data[0])
- key = NULL;
-
- memset(&cp, 0, sizeof(cp));
- cp.local = rx->local;
- cp.key = rx->key;
- cp.security_level = rx->min_sec_level;
- cp.exclusive = rx->exclusive | exclusive;
- cp.service_id = srx->srx_service;
- call = rxrpc_new_client_call(rx, &cp, srx, user_call_ID, GFP_KERNEL);
-
- _leave(" = %p\n", call);
- return call;
-}
-
-/*
- * send a message forming part of a client call through an RxRPC socket
- * - caller holds the socket locked
- * - the socket may be either a client socket or a server socket
- */
-int rxrpc_do_sendmsg(struct rxrpc_sock *rx, struct msghdr *msg, size_t len)
-{
- enum rxrpc_command cmd;
- struct rxrpc_call *call;
- unsigned long user_call_ID = 0;
- bool exclusive = false;
- u32 abort_code = 0;
- int ret;
-
- _enter("");
-
- ret = rxrpc_sendmsg_cmsg(msg, &user_call_ID, &cmd, &abort_code,
- &exclusive);
- if (ret < 0)
- return ret;
-
- if (cmd == RXRPC_CMD_ACCEPT) {
- if (rx->sk.sk_state != RXRPC_SERVER_LISTENING)
- return -EINVAL;
- call = rxrpc_accept_call(rx, user_call_ID, NULL);
- if (IS_ERR(call))
- return PTR_ERR(call);
- rxrpc_put_call(call);
- return 0;
- }
-
- call = rxrpc_find_call_by_user_ID(rx, user_call_ID);
- if (!call) {
- if (cmd != RXRPC_CMD_SEND_DATA)
- return -EBADSLT;
- call = rxrpc_new_client_call_for_sendmsg(rx, msg, user_call_ID,
- exclusive);
- if (IS_ERR(call))
- return PTR_ERR(call);
- }
-
- rxrpc_see_call(call);
- _debug("CALL %d USR %lx ST %d on CONN %p",
- call->debug_id, call->user_call_ID, call->state, call->conn);
-
- if (call->state >= RXRPC_CALL_COMPLETE) {
- /* it's too late for this call */
- ret = -ESHUTDOWN;
- } else if (cmd == RXRPC_CMD_SEND_ABORT) {
- rxrpc_send_abort(call, abort_code);
- ret = 0;
- } else if (cmd != RXRPC_CMD_SEND_DATA) {
- ret = -EINVAL;
- } else if (rxrpc_is_client_call(call) &&
- call->state != RXRPC_CALL_CLIENT_SEND_REQUEST) {
- /* request phase complete for this client call */
- ret = -EPROTO;
- } else if (rxrpc_is_service_call(call) &&
- call->state != RXRPC_CALL_SERVER_ACK_REQUEST &&
- call->state != RXRPC_CALL_SERVER_SEND_REPLY) {
- /* Reply phase not begun or not complete for service call. */
- ret = -EPROTO;
- } else {
- ret = rxrpc_send_data(rx, call, msg, len);
- }
-
- rxrpc_put_call(call);
- _leave(" = %d", ret);
- return ret;
-}
-
-/**
- * rxrpc_kernel_send_data - Allow a kernel service to send data on a call
- * @sock: The socket the call is on
- * @call: The call to send data through
- * @msg: The data to send
- * @len: The amount of data to send
- *
- * Allow a kernel service to send data on a call. The call must be in an state
- * appropriate to sending data. No control data should be supplied in @msg,
- * nor should an address be supplied. MSG_MORE should be flagged if there's
- * more data to come, otherwise this data will end the transmission phase.
- */
-int rxrpc_kernel_send_data(struct socket *sock, struct rxrpc_call *call,
- struct msghdr *msg, size_t len)
-{
- int ret;
-
- _enter("{%d,%s},", call->debug_id, rxrpc_call_states[call->state]);
-
- ASSERTCMP(msg->msg_name, ==, NULL);
- ASSERTCMP(msg->msg_control, ==, NULL);
-
- lock_sock(sock->sk);
-
- _debug("CALL %d USR %lx ST %d on CONN %p",
- call->debug_id, call->user_call_ID, call->state, call->conn);
-
- if (call->state >= RXRPC_CALL_COMPLETE) {
- ret = -ESHUTDOWN; /* it's too late for this call */
- } else if (call->state != RXRPC_CALL_CLIENT_SEND_REQUEST &&
- call->state != RXRPC_CALL_SERVER_ACK_REQUEST &&
- call->state != RXRPC_CALL_SERVER_SEND_REPLY) {
- ret = -EPROTO; /* request phase complete for this client call */
- } else {
- ret = rxrpc_send_data(rxrpc_sk(sock->sk), call, msg, len);
- }
-
- release_sock(sock->sk);
- _leave(" = %d", ret);
- return ret;
-}
-EXPORT_SYMBOL(rxrpc_kernel_send_data);
-
-/**
- * rxrpc_kernel_abort_call - Allow a kernel service to abort a call
- * @sock: The socket the call is on
- * @call: The call to be aborted
- * @abort_code: The abort code to stick into the ABORT packet
- *
- * Allow a kernel service to abort a call, if it's still in an abortable state.
- */
-void rxrpc_kernel_abort_call(struct socket *sock, struct rxrpc_call *call,
- u32 abort_code)
-{
- _enter("{%d},%d", call->debug_id, abort_code);
-
- lock_sock(sock->sk);
-
- _debug("CALL %d USR %lx ST %d on CONN %p",
- call->debug_id, call->user_call_ID, call->state, call->conn);
-
- rxrpc_send_abort(call, abort_code);
-
- release_sock(sock->sk);
- _leave("");
-}
-
-EXPORT_SYMBOL(rxrpc_kernel_abort_call);
-
-/*
* send a packet through the transport endpoint
*/
int rxrpc_send_data_packet(struct rxrpc_connection *conn, struct sk_buff *skb)
@@ -375,346 +88,3 @@ send_fragmentable:
_leave(" = %d [frag %u]", ret, conn->params.peer->maxdata);
return ret;
}
-
-/*
- * 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)
-{
- DECLARE_WAITQUEUE(myself, current);
- int ret;
-
- _enter(",{%d},%ld",
- CIRC_SPACE(call->acks_head, ACCESS_ONCE(call->acks_tail),
- call->acks_winsz),
- *timeo);
-
- add_wait_queue(&call->waitq, &myself);
-
- for (;;) {
- set_current_state(TASK_INTERRUPTIBLE);
- ret = 0;
- if (CIRC_SPACE(call->acks_head, ACCESS_ONCE(call->acks_tail),
- call->acks_winsz) > 0)
- break;
- if (signal_pending(current)) {
- ret = sock_intr_errno(*timeo);
- break;
- }
-
- release_sock(&rx->sk);
- *timeo = schedule_timeout(*timeo);
- lock_sock(&rx->sk);
- }
-
- remove_wait_queue(&call->waitq, &myself);
- set_current_state(TASK_RUNNING);
- _leave(" = %d", ret);
- return ret;
-}
-
-/*
- * attempt to schedule an instant Tx resend
- */
-static inline void rxrpc_instant_resend(struct rxrpc_call *call)
-{
- read_lock_bh(&call->state_lock);
- if (try_to_del_timer_sync(&call->resend_timer) >= 0) {
- clear_bit(RXRPC_CALL_RUN_RTIMER, &call->flags);
- if (call->state < RXRPC_CALL_COMPLETE &&
- !test_and_set_bit(RXRPC_CALL_EV_RESEND_TIMER, &call->events))
- rxrpc_queue_call(call);
- }
- read_unlock_bh(&call->state_lock);
-}
-
-/*
- * queue a packet for transmission, set the resend timer and attempt
- * to send the packet immediately
- */
-static void rxrpc_queue_packet(struct rxrpc_call *call, struct sk_buff *skb,
- bool last)
-{
- struct rxrpc_skb_priv *sp = rxrpc_skb(skb);
- int ret;
-
- _net("queue skb %p [%d]", skb, call->acks_head);
-
- ASSERT(call->acks_window != NULL);
- call->acks_window[call->acks_head] = (unsigned long) skb;
- smp_wmb();
- call->acks_head = (call->acks_head + 1) & (call->acks_winsz - 1);
-
- if (last || call->state == RXRPC_CALL_SERVER_ACK_REQUEST) {
- _debug("________awaiting reply/ACK__________");
- write_lock_bh(&call->state_lock);
- switch (call->state) {
- case RXRPC_CALL_CLIENT_SEND_REQUEST:
- call->state = RXRPC_CALL_CLIENT_AWAIT_REPLY;
- break;
- case RXRPC_CALL_SERVER_ACK_REQUEST:
- call->state = RXRPC_CALL_SERVER_SEND_REPLY;
- if (!last)
- break;
- case RXRPC_CALL_SERVER_SEND_REPLY:
- call->state = RXRPC_CALL_SERVER_AWAIT_ACK;
- break;
- default:
- break;
- }
- write_unlock_bh(&call->state_lock);
- }
-
- _proto("Tx DATA %%%u { #%u }", sp->hdr.serial, sp->hdr.seq);
-
- sp->need_resend = false;
- sp->resend_at = jiffies + rxrpc_resend_timeout;
- if (!test_and_set_bit(RXRPC_CALL_RUN_RTIMER, &call->flags)) {
- _debug("run timer");
- call->resend_timer.expires = sp->resend_at;
- add_timer(&call->resend_timer);
- }
-
- /* attempt to cancel the rx-ACK timer, deferring reply transmission if
- * we're ACK'ing the request phase of an incoming call */
- ret = -EAGAIN;
- if (try_to_del_timer_sync(&call->ack_timer) >= 0) {
- /* the packet may be freed by rxrpc_process_call() before this
- * returns */
- if (rxrpc_is_client_call(call))
- rxrpc_expose_client_call(call);
- ret = rxrpc_send_data_packet(call->conn, skb);
- _net("sent skb %p", skb);
- } else {
- _debug("failed to delete ACK timer");
- }
-
- if (ret < 0) {
- _debug("need instant resend %d", ret);
- sp->need_resend = true;
- rxrpc_instant_resend(call);
- }
-
- _leave("");
-}
-
-/*
- * Convert a host-endian header into a network-endian header.
- */
-static void rxrpc_insert_header(struct sk_buff *skb)
-{
- struct rxrpc_wire_header whdr;
- struct rxrpc_skb_priv *sp = rxrpc_skb(skb);
-
- whdr.epoch = htonl(sp->hdr.epoch);
- whdr.cid = htonl(sp->hdr.cid);
- whdr.callNumber = htonl(sp->hdr.callNumber);
- whdr.seq = htonl(sp->hdr.seq);
- whdr.serial = htonl(sp->hdr.serial);
- whdr.type = sp->hdr.type;
- whdr.flags = sp->hdr.flags;
- whdr.userStatus = sp->hdr.userStatus;
- whdr.securityIndex = sp->hdr.securityIndex;
- whdr._rsvd = htons(sp->hdr._rsvd);
- whdr.serviceId = htons(sp->hdr.serviceId);
-
- memcpy(skb->head, &whdr, sizeof(whdr));
-}
-
-/*
- * send data through a socket
- * - must be called in process context
- * - caller holds the socket locked
- */
-static int rxrpc_send_data(struct rxrpc_sock *rx,
- struct rxrpc_call *call,
- struct msghdr *msg, size_t len)
-{
- struct rxrpc_skb_priv *sp;
- struct sk_buff *skb;
- struct sock *sk = &rx->sk;
- long timeo;
- bool more;
- int ret, copied;
-
- timeo = sock_sndtimeo(sk, msg->msg_flags & MSG_DONTWAIT);
-
- /* this should be in poll */
- sk_clear_bit(SOCKWQ_ASYNC_NOSPACE, sk);
-
- if (sk->sk_err || (sk->sk_shutdown & SEND_SHUTDOWN))
- return -EPIPE;
-
- more = msg->msg_flags & MSG_MORE;
-
- skb = call->tx_pending;
- call->tx_pending = NULL;
- rxrpc_see_skb(skb);
-
- copied = 0;
- do {
- if (!skb) {
- size_t size, chunk, max, space;
-
- _debug("alloc");
-
- if (CIRC_SPACE(call->acks_head,
- ACCESS_ONCE(call->acks_tail),
- call->acks_winsz) <= 0) {
- ret = -EAGAIN;
- if (msg->msg_flags & MSG_DONTWAIT)
- goto maybe_error;
- ret = rxrpc_wait_for_tx_window(rx, call,
- &timeo);
- if (ret < 0)
- goto maybe_error;
- }
-
- max = call->conn->params.peer->maxdata;
- max -= call->conn->security_size;
- max &= ~(call->conn->size_align - 1UL);
-
- chunk = max;
- if (chunk > msg_data_left(msg) && !more)
- chunk = msg_data_left(msg);
-
- space = chunk + call->conn->size_align;
- space &= ~(call->conn->size_align - 1UL);
-
- size = space + call->conn->header_size;
-
- _debug("SIZE: %zu/%zu/%zu", chunk, space, size);
-
- /* create a buffer that we can retain until it's ACK'd */
- skb = sock_alloc_send_skb(
- sk, size, msg->msg_flags & MSG_DONTWAIT, &ret);
- if (!skb)
- goto maybe_error;
-
- rxrpc_new_skb(skb);
-
- _debug("ALLOC SEND %p", skb);
-
- ASSERTCMP(skb->mark, ==, 0);
-
- _debug("HS: %u", call->conn->header_size);
- skb_reserve(skb, call->conn->header_size);
- skb->len += call->conn->header_size;
-
- sp = rxrpc_skb(skb);
- sp->remain = chunk;
- if (sp->remain > skb_tailroom(skb))
- sp->remain = skb_tailroom(skb);
-
- _net("skb: hr %d, tr %d, hl %d, rm %d",
- skb_headroom(skb),
- skb_tailroom(skb),
- skb_headlen(skb),
- sp->remain);
-
- skb->ip_summed = CHECKSUM_UNNECESSARY;
- }
-
- _debug("append");
- sp = rxrpc_skb(skb);
-
- /* append next segment of data to the current buffer */
- if (msg_data_left(msg) > 0) {
- int copy = skb_tailroom(skb);
- ASSERTCMP(copy, >, 0);
- if (copy > msg_data_left(msg))
- copy = msg_data_left(msg);
- if (copy > sp->remain)
- copy = sp->remain;
-
- _debug("add");
- ret = skb_add_data(skb, &msg->msg_iter, copy);
- _debug("added");
- if (ret < 0)
- goto efault;
- sp->remain -= copy;
- skb->mark += copy;
- copied += copy;
- }
-
- /* check for the far side aborting the call or a network error
- * occurring */
- if (call->state == RXRPC_CALL_COMPLETE)
- goto call_terminated;
-
- /* add the packet to the send queue if it's now full */
- if (sp->remain <= 0 ||
- (msg_data_left(msg) == 0 && !more)) {
- struct rxrpc_connection *conn = call->conn;
- uint32_t seq;
- size_t pad;
-
- /* pad out if we're using security */
- if (conn->security_ix) {
- pad = conn->security_size + skb->mark;
- pad = conn->size_align - pad;
- pad &= conn->size_align - 1;
- _debug("pad %zu", pad);
- if (pad)
- memset(skb_put(skb, pad), 0, pad);
- }
-
- seq = atomic_inc_return(&call->sequence);
-
- sp->hdr.epoch = conn->proto.epoch;
- sp->hdr.cid = call->cid;
- sp->hdr.callNumber = call->call_id;
- sp->hdr.seq = seq;
- sp->hdr.serial = atomic_inc_return(&conn->serial);
- sp->hdr.type = RXRPC_PACKET_TYPE_DATA;
- sp->hdr.userStatus = 0;
- sp->hdr.securityIndex = conn->security_ix;
- sp->hdr._rsvd = 0;
- sp->hdr.serviceId = call->service_id;
-
- sp->hdr.flags = conn->out_clientflag;
- if (msg_data_left(msg) == 0 && !more)
- sp->hdr.flags |= RXRPC_LAST_PACKET;
- else if (CIRC_SPACE(call->acks_head,
- ACCESS_ONCE(call->acks_tail),
- call->acks_winsz) > 1)
- sp->hdr.flags |= RXRPC_MORE_PACKETS;
- if (more && seq & 1)
- sp->hdr.flags |= RXRPC_REQUEST_ACK;
-
- ret = conn->security->secure_packet(
- call, skb, skb->mark,
- skb->head + sizeof(struct rxrpc_wire_header));
- if (ret < 0)
- goto out;
-
- rxrpc_insert_header(skb);
- rxrpc_queue_packet(call, skb, !msg_data_left(msg) && !more);
- skb = NULL;
- }
- } while (msg_data_left(msg) > 0);
-
-success:
- ret = copied;
-out:
- call->tx_pending = skb;
- _leave(" = %d", ret);
- return ret;
-
-call_terminated:
- rxrpc_free_skb(skb);
- _leave(" = %d", -call->error);
- return ret;
-
-maybe_error:
- if (copied)
- goto success;
- goto out;
-
-efault:
- ret = -EFAULT;
- goto out;
-}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-30 19:06:14 +0000