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![Linus Torvalds](/assets/img/avatar_default.png)
Current release - regressions: - sched: act_pedit: free pedit keys on bail from offset check Current release - new code bugs: - pds_core: - Kconfig fixes (DEBUGFS and AUXILIARY_BUS) - fix mutex double unlock in error path Previous releases - regressions: - sched: cls_api: remove block_cb from driver_list before freeing - nf_tables: fix ct untracked match breakage - eth: mtk_eth_soc: drop generic vlan rx offload - sched: flower: fix error handler on replace Previous releases - always broken: - tcp: fix skb_copy_ubufs() vs BIG TCP - ipv6: fix skb hash for some RST packets - af_packet: don't send zero-byte data in packet_sendmsg_spkt() - rxrpc: timeout handling fixes after moving client call connection to the I/O thread - ixgbe: fix panic during XDP_TX with > 64 CPUs - igc: RMW the SRRCTL register to prevent losing timestamp config - dsa: mt7530: fix corrupt frames using TRGMII on 40 MHz XTAL MT7621 - r8152: - fix flow control issue of RTL8156A - fix the poor throughput for 2.5G devices - move setting r8153b_rx_agg_chg_indicate() to fix coalescing - enable autosuspend - ncsi: clear Tx enable mode when handling a Config required AEN - octeontx2-pf: macsec: fixes for CN10KB ASIC rev Misc: - 9p: remove INET dependency Signed-off-by: Jakub Kicinski <kuba@kernel.org> -----BEGIN PGP SIGNATURE----- iQIzBAABCAAdFiEE6jPA+I1ugmIBA4hXMUZtbf5SIrsFAmRVeUIACgkQMUZtbf5S IrtTug/9Hhg/L0PTSwrfuGh4W1/cjheMWppNLkwyWQUiKG7FcZQ9vu9PxceE3VRu 2fTqHyvgDMZ8jACovXObeda8z1+g3s/tIPaXELephBIjVlF/h3kG2OaIzlU4jDb4 A4vklwf8eLbfyVBG22QgKl/I70zVMtnmnOo6c6CPuIOTcMPzslndFO9tB0nCg99F DCgCM1BBP1tz+OUch2rLnSzYcqkWqS49BhRk6dhYSliawUFU/5+1tDGDjwWolkfm 0jqP9DjBOSpZKO8m7SpsUNz7NFRIfYErWZ+YebWbggNxj/6TRJTP83MM0tGoK1rE /mz2xpuOki59frlwVOAD6gb/qefjHUp21P4NA7bnhizxFlQL5MHpCeGQ9yLHBSmY 9Q4ArJkM4jXQ0oDA2nII/pz+cDZGEWFGQ14WW3kYUb7WFmISH4I9OiA9i0TBW6OL r1Y/rqzkUvtKWzh9RpiAF9lsdHAm3SX9ES5RfMxzv0x886VOZR4jaMmokRDdPRzq 0r2Oyj75b62+X0r44Fe22Pl/kPS/uh3642xo9h85aAv/EvhT9JNzMvomJm9d6tkb 966I085AVbwxPAy+rl5SWyAq60EWDExNTjZvPv0mSMlmSsQ9iK5//xOF2Saw2zai /44zQ27tVGkCC44Ou5KmfJN3u4OrKkhcuyxtcDr9QeoOdKZRkMg= =9xND -----END PGP SIGNATURE----- Merge tag 'net-6.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net Pull networking fixes from Jakub Kicinski: "Including fixes from netfilter. Current release - regressions: - sched: act_pedit: free pedit keys on bail from offset check Current release - new code bugs: - pds_core: - Kconfig fixes (DEBUGFS and AUXILIARY_BUS) - fix mutex double unlock in error path Previous releases - regressions: - sched: cls_api: remove block_cb from driver_list before freeing - nf_tables: fix ct untracked match breakage - eth: mtk_eth_soc: drop generic vlan rx offload - sched: flower: fix error handler on replace Previous releases - always broken: - tcp: fix skb_copy_ubufs() vs BIG TCP - ipv6: fix skb hash for some RST packets - af_packet: don't send zero-byte data in packet_sendmsg_spkt() - rxrpc: timeout handling fixes after moving client call connection to the I/O thread - ixgbe: fix panic during XDP_TX with > 64 CPUs - igc: RMW the SRRCTL register to prevent losing timestamp config - dsa: mt7530: fix corrupt frames using TRGMII on 40 MHz XTAL MT7621 - r8152: - fix flow control issue of RTL8156A - fix the poor throughput for 2.5G devices - move setting r8153b_rx_agg_chg_indicate() to fix coalescing - enable autosuspend - ncsi: clear Tx enable mode when handling a Config required AEN - octeontx2-pf: macsec: fixes for CN10KB ASIC rev Misc: - 9p: remove INET dependency" * tag 'net-6.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (69 commits) net: bcmgenet: Remove phy_stop() from bcmgenet_netif_stop() pds_core: fix mutex double unlock in error path net/sched: flower: fix error handler on replace Revert "net/sched: flower: Fix wrong handle assignment during filter change" net/sched: flower: fix filter idr initialization net: fec: correct the counting of XDP sent frames bonding: add xdp_features support net: enetc: check the index of the SFI rather than the handle sfc: Add back mailing list virtio_net: suppress cpu stall when free_unused_bufs ice: block LAN in case of VF to VF offload net: dsa: mt7530: fix network connectivity with multiple CPU ports net: dsa: mt7530: fix corrupt frames using trgmii on 40 MHz XTAL MT7621 9p: Remove INET dependency netfilter: nf_tables: fix ct untracked match breakage af_packet: Don't send zero-byte data in packet_sendmsg_spkt(). igc: read before write to SRRCTL register pds_core: add AUXILIARY_BUS and NET_DEVLINK to Kconfig pds_core: remove CONFIG_DEBUG_FS from makefile ionic: catch failure from devlink_alloc ...
767 lines
20 KiB
C
767 lines
20 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/* RxRPC individual remote procedure call handling
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*
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* Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
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* Written by David Howells (dhowells@redhat.com)
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/slab.h>
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#include <linux/module.h>
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#include <linux/circ_buf.h>
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#include <linux/spinlock_types.h>
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#include <net/sock.h>
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#include <net/af_rxrpc.h>
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#include "ar-internal.h"
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const char *const rxrpc_call_states[NR__RXRPC_CALL_STATES] = {
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[RXRPC_CALL_UNINITIALISED] = "Uninit ",
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[RXRPC_CALL_CLIENT_AWAIT_CONN] = "ClWtConn",
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[RXRPC_CALL_CLIENT_SEND_REQUEST] = "ClSndReq",
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[RXRPC_CALL_CLIENT_AWAIT_REPLY] = "ClAwtRpl",
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[RXRPC_CALL_CLIENT_RECV_REPLY] = "ClRcvRpl",
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[RXRPC_CALL_SERVER_PREALLOC] = "SvPrealc",
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[RXRPC_CALL_SERVER_SECURING] = "SvSecure",
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[RXRPC_CALL_SERVER_RECV_REQUEST] = "SvRcvReq",
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[RXRPC_CALL_SERVER_ACK_REQUEST] = "SvAckReq",
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[RXRPC_CALL_SERVER_SEND_REPLY] = "SvSndRpl",
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[RXRPC_CALL_SERVER_AWAIT_ACK] = "SvAwtACK",
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[RXRPC_CALL_COMPLETE] = "Complete",
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};
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const char *const rxrpc_call_completions[NR__RXRPC_CALL_COMPLETIONS] = {
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[RXRPC_CALL_SUCCEEDED] = "Complete",
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[RXRPC_CALL_REMOTELY_ABORTED] = "RmtAbort",
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[RXRPC_CALL_LOCALLY_ABORTED] = "LocAbort",
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[RXRPC_CALL_LOCAL_ERROR] = "LocError",
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[RXRPC_CALL_NETWORK_ERROR] = "NetError",
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};
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struct kmem_cache *rxrpc_call_jar;
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static DEFINE_SEMAPHORE(rxrpc_call_limiter, 1000);
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static DEFINE_SEMAPHORE(rxrpc_kernel_call_limiter, 1000);
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void rxrpc_poke_call(struct rxrpc_call *call, enum rxrpc_call_poke_trace what)
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{
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struct rxrpc_local *local = call->local;
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bool busy;
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if (!test_bit(RXRPC_CALL_DISCONNECTED, &call->flags)) {
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spin_lock_bh(&local->lock);
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busy = !list_empty(&call->attend_link);
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trace_rxrpc_poke_call(call, busy, what);
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if (!busy && !rxrpc_try_get_call(call, rxrpc_call_get_poke))
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busy = true;
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if (!busy) {
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list_add_tail(&call->attend_link, &local->call_attend_q);
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}
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spin_unlock_bh(&local->lock);
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if (!busy)
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rxrpc_wake_up_io_thread(local);
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}
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}
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static void rxrpc_call_timer_expired(struct timer_list *t)
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{
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struct rxrpc_call *call = from_timer(call, t, timer);
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_enter("%d", call->debug_id);
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if (!__rxrpc_call_is_complete(call)) {
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trace_rxrpc_timer_expired(call, jiffies);
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rxrpc_poke_call(call, rxrpc_call_poke_timer);
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}
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}
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void rxrpc_reduce_call_timer(struct rxrpc_call *call,
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unsigned long expire_at,
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unsigned long now,
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enum rxrpc_timer_trace why)
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{
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trace_rxrpc_timer(call, why, now);
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timer_reduce(&call->timer, expire_at);
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}
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static struct lock_class_key rxrpc_call_user_mutex_lock_class_key;
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static void rxrpc_destroy_call(struct work_struct *);
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/*
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* find an extant server call
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* - called in process context with IRQs enabled
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*/
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struct rxrpc_call *rxrpc_find_call_by_user_ID(struct rxrpc_sock *rx,
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unsigned long user_call_ID)
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{
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struct rxrpc_call *call;
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struct rb_node *p;
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_enter("%p,%lx", rx, user_call_ID);
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read_lock(&rx->call_lock);
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p = rx->calls.rb_node;
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while (p) {
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call = rb_entry(p, struct rxrpc_call, sock_node);
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if (user_call_ID < call->user_call_ID)
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p = p->rb_left;
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else if (user_call_ID > call->user_call_ID)
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p = p->rb_right;
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else
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goto found_extant_call;
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}
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read_unlock(&rx->call_lock);
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_leave(" = NULL");
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return NULL;
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found_extant_call:
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rxrpc_get_call(call, rxrpc_call_get_sendmsg);
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read_unlock(&rx->call_lock);
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_leave(" = %p [%d]", call, refcount_read(&call->ref));
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return call;
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}
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/*
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* allocate a new call
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*/
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struct rxrpc_call *rxrpc_alloc_call(struct rxrpc_sock *rx, gfp_t gfp,
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unsigned int debug_id)
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{
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struct rxrpc_call *call;
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struct rxrpc_net *rxnet = rxrpc_net(sock_net(&rx->sk));
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call = kmem_cache_zalloc(rxrpc_call_jar, gfp);
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if (!call)
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return NULL;
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mutex_init(&call->user_mutex);
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/* Prevent lockdep reporting a deadlock false positive between the afs
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* filesystem and sys_sendmsg() via the mmap sem.
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*/
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if (rx->sk.sk_kern_sock)
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lockdep_set_class(&call->user_mutex,
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&rxrpc_call_user_mutex_lock_class_key);
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timer_setup(&call->timer, rxrpc_call_timer_expired, 0);
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INIT_WORK(&call->destroyer, rxrpc_destroy_call);
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INIT_LIST_HEAD(&call->link);
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INIT_LIST_HEAD(&call->wait_link);
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INIT_LIST_HEAD(&call->accept_link);
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INIT_LIST_HEAD(&call->recvmsg_link);
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INIT_LIST_HEAD(&call->sock_link);
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INIT_LIST_HEAD(&call->attend_link);
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INIT_LIST_HEAD(&call->tx_sendmsg);
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INIT_LIST_HEAD(&call->tx_buffer);
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skb_queue_head_init(&call->recvmsg_queue);
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skb_queue_head_init(&call->rx_oos_queue);
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init_waitqueue_head(&call->waitq);
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spin_lock_init(&call->notify_lock);
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spin_lock_init(&call->tx_lock);
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refcount_set(&call->ref, 1);
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call->debug_id = debug_id;
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call->tx_total_len = -1;
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call->next_rx_timo = 20 * HZ;
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call->next_req_timo = 1 * HZ;
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call->ackr_window = 1;
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call->ackr_wtop = 1;
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memset(&call->sock_node, 0xed, sizeof(call->sock_node));
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call->rx_winsize = rxrpc_rx_window_size;
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call->tx_winsize = 16;
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if (RXRPC_TX_SMSS > 2190)
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call->cong_cwnd = 2;
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else if (RXRPC_TX_SMSS > 1095)
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call->cong_cwnd = 3;
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else
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call->cong_cwnd = 4;
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call->cong_ssthresh = RXRPC_TX_MAX_WINDOW;
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call->rxnet = rxnet;
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call->rtt_avail = RXRPC_CALL_RTT_AVAIL_MASK;
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atomic_inc(&rxnet->nr_calls);
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return call;
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}
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/*
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* Allocate a new client call.
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*/
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static struct rxrpc_call *rxrpc_alloc_client_call(struct rxrpc_sock *rx,
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struct sockaddr_rxrpc *srx,
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struct rxrpc_conn_parameters *cp,
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struct rxrpc_call_params *p,
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gfp_t gfp,
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unsigned int debug_id)
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{
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struct rxrpc_call *call;
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ktime_t now;
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int ret;
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_enter("");
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call = rxrpc_alloc_call(rx, gfp, debug_id);
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if (!call)
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return ERR_PTR(-ENOMEM);
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now = ktime_get_real();
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call->acks_latest_ts = now;
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call->cong_tstamp = now;
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call->dest_srx = *srx;
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call->interruptibility = p->interruptibility;
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call->tx_total_len = p->tx_total_len;
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call->key = key_get(cp->key);
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call->local = rxrpc_get_local(cp->local, rxrpc_local_get_call);
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call->security_level = cp->security_level;
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if (p->kernel)
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__set_bit(RXRPC_CALL_KERNEL, &call->flags);
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if (cp->upgrade)
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__set_bit(RXRPC_CALL_UPGRADE, &call->flags);
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if (cp->exclusive)
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__set_bit(RXRPC_CALL_EXCLUSIVE, &call->flags);
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if (p->timeouts.normal)
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call->next_rx_timo = min(msecs_to_jiffies(p->timeouts.normal), 1UL);
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if (p->timeouts.idle)
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call->next_req_timo = min(msecs_to_jiffies(p->timeouts.idle), 1UL);
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if (p->timeouts.hard)
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call->hard_timo = p->timeouts.hard * HZ;
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ret = rxrpc_init_client_call_security(call);
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if (ret < 0) {
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rxrpc_prefail_call(call, RXRPC_CALL_LOCAL_ERROR, ret);
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rxrpc_put_call(call, rxrpc_call_put_discard_error);
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return ERR_PTR(ret);
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}
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rxrpc_set_call_state(call, RXRPC_CALL_CLIENT_AWAIT_CONN);
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trace_rxrpc_call(call->debug_id, refcount_read(&call->ref),
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p->user_call_ID, rxrpc_call_new_client);
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_leave(" = %p", call);
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return call;
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}
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/*
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* Initiate the call ack/resend/expiry timer.
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*/
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void rxrpc_start_call_timer(struct rxrpc_call *call)
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{
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unsigned long now = jiffies;
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unsigned long j = now + MAX_JIFFY_OFFSET;
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call->delay_ack_at = j;
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call->ack_lost_at = j;
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call->resend_at = j;
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call->ping_at = j;
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call->keepalive_at = j;
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call->expect_rx_by = j;
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call->expect_req_by = j;
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call->expect_term_by = j + call->hard_timo;
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call->timer.expires = now;
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}
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/*
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* Wait for a call slot to become available.
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*/
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static struct semaphore *rxrpc_get_call_slot(struct rxrpc_call_params *p, gfp_t gfp)
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{
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struct semaphore *limiter = &rxrpc_call_limiter;
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if (p->kernel)
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limiter = &rxrpc_kernel_call_limiter;
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if (p->interruptibility == RXRPC_UNINTERRUPTIBLE) {
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down(limiter);
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return limiter;
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}
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return down_interruptible(limiter) < 0 ? NULL : limiter;
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}
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/*
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* Release a call slot.
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*/
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static void rxrpc_put_call_slot(struct rxrpc_call *call)
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{
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struct semaphore *limiter = &rxrpc_call_limiter;
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if (test_bit(RXRPC_CALL_KERNEL, &call->flags))
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limiter = &rxrpc_kernel_call_limiter;
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up(limiter);
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}
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/*
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* Start the process of connecting a call. We obtain a peer and a connection
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* bundle, but the actual association of a call with a connection is offloaded
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* to the I/O thread to simplify locking.
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*/
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static int rxrpc_connect_call(struct rxrpc_call *call, gfp_t gfp)
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{
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struct rxrpc_local *local = call->local;
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int ret = -ENOMEM;
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_enter("{%d,%lx},", call->debug_id, call->user_call_ID);
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call->peer = rxrpc_lookup_peer(local, &call->dest_srx, gfp);
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if (!call->peer)
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goto error;
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ret = rxrpc_look_up_bundle(call, gfp);
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if (ret < 0)
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goto error;
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trace_rxrpc_client(NULL, -1, rxrpc_client_queue_new_call);
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rxrpc_get_call(call, rxrpc_call_get_io_thread);
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spin_lock(&local->client_call_lock);
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list_add_tail(&call->wait_link, &local->new_client_calls);
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spin_unlock(&local->client_call_lock);
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rxrpc_wake_up_io_thread(local);
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return 0;
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error:
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__set_bit(RXRPC_CALL_DISCONNECTED, &call->flags);
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return ret;
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}
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/*
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* Set up a call for the given parameters.
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* - Called with the socket lock held, which it must release.
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* - If it returns a call, the call's lock will need releasing by the caller.
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*/
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struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *rx,
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struct rxrpc_conn_parameters *cp,
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struct sockaddr_rxrpc *srx,
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struct rxrpc_call_params *p,
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gfp_t gfp,
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unsigned int debug_id)
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__releases(&rx->sk.sk_lock.slock)
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__acquires(&call->user_mutex)
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{
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struct rxrpc_call *call, *xcall;
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struct rxrpc_net *rxnet;
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struct semaphore *limiter;
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struct rb_node *parent, **pp;
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int ret;
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_enter("%p,%lx", rx, p->user_call_ID);
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limiter = rxrpc_get_call_slot(p, gfp);
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if (!limiter) {
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release_sock(&rx->sk);
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return ERR_PTR(-ERESTARTSYS);
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}
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call = rxrpc_alloc_client_call(rx, srx, cp, p, gfp, debug_id);
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if (IS_ERR(call)) {
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release_sock(&rx->sk);
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up(limiter);
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_leave(" = %ld", PTR_ERR(call));
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return call;
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}
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/* We need to protect a partially set up call against the user as we
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* will be acting outside the socket lock.
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*/
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mutex_lock(&call->user_mutex);
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/* Publish the call, even though it is incompletely set up as yet */
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write_lock(&rx->call_lock);
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|
|
pp = &rx->calls.rb_node;
|
|
parent = NULL;
|
|
while (*pp) {
|
|
parent = *pp;
|
|
xcall = rb_entry(parent, struct rxrpc_call, sock_node);
|
|
|
|
if (p->user_call_ID < xcall->user_call_ID)
|
|
pp = &(*pp)->rb_left;
|
|
else if (p->user_call_ID > xcall->user_call_ID)
|
|
pp = &(*pp)->rb_right;
|
|
else
|
|
goto error_dup_user_ID;
|
|
}
|
|
|
|
rcu_assign_pointer(call->socket, rx);
|
|
call->user_call_ID = p->user_call_ID;
|
|
__set_bit(RXRPC_CALL_HAS_USERID, &call->flags);
|
|
rxrpc_get_call(call, rxrpc_call_get_userid);
|
|
rb_link_node(&call->sock_node, parent, pp);
|
|
rb_insert_color(&call->sock_node, &rx->calls);
|
|
list_add(&call->sock_link, &rx->sock_calls);
|
|
|
|
write_unlock(&rx->call_lock);
|
|
|
|
rxnet = call->rxnet;
|
|
spin_lock(&rxnet->call_lock);
|
|
list_add_tail_rcu(&call->link, &rxnet->calls);
|
|
spin_unlock(&rxnet->call_lock);
|
|
|
|
/* From this point on, the call is protected by its own lock. */
|
|
release_sock(&rx->sk);
|
|
|
|
/* Set up or get a connection record and set the protocol parameters,
|
|
* including channel number and call ID.
|
|
*/
|
|
ret = rxrpc_connect_call(call, gfp);
|
|
if (ret < 0)
|
|
goto error_attached_to_socket;
|
|
|
|
_leave(" = %p [new]", call);
|
|
return call;
|
|
|
|
/* We unexpectedly found the user ID in the list after taking
|
|
* the call_lock. This shouldn't happen unless the user races
|
|
* with itself and tries to add the same user ID twice at the
|
|
* same time in different threads.
|
|
*/
|
|
error_dup_user_ID:
|
|
write_unlock(&rx->call_lock);
|
|
release_sock(&rx->sk);
|
|
rxrpc_prefail_call(call, RXRPC_CALL_LOCAL_ERROR, -EEXIST);
|
|
trace_rxrpc_call(call->debug_id, refcount_read(&call->ref), 0,
|
|
rxrpc_call_see_userid_exists);
|
|
mutex_unlock(&call->user_mutex);
|
|
rxrpc_put_call(call, rxrpc_call_put_userid_exists);
|
|
_leave(" = -EEXIST");
|
|
return ERR_PTR(-EEXIST);
|
|
|
|
/* We got an error, but the call is attached to the socket and is in
|
|
* need of release. However, we might now race with recvmsg() when it
|
|
* completion notifies the socket. Return 0 from sys_sendmsg() and
|
|
* leave the error to recvmsg() to deal with.
|
|
*/
|
|
error_attached_to_socket:
|
|
trace_rxrpc_call(call->debug_id, refcount_read(&call->ref), ret,
|
|
rxrpc_call_see_connect_failed);
|
|
rxrpc_set_call_completion(call, RXRPC_CALL_LOCAL_ERROR, 0, ret);
|
|
_leave(" = c=%08x [err]", call->debug_id);
|
|
return call;
|
|
}
|
|
|
|
/*
|
|
* Set up an incoming call. call->conn points to the connection.
|
|
* This is called in BH context and isn't allowed to fail.
|
|
*/
|
|
void rxrpc_incoming_call(struct rxrpc_sock *rx,
|
|
struct rxrpc_call *call,
|
|
struct sk_buff *skb)
|
|
{
|
|
struct rxrpc_connection *conn = call->conn;
|
|
struct rxrpc_skb_priv *sp = rxrpc_skb(skb);
|
|
u32 chan;
|
|
|
|
_enter(",%d", call->conn->debug_id);
|
|
|
|
rcu_assign_pointer(call->socket, rx);
|
|
call->call_id = sp->hdr.callNumber;
|
|
call->dest_srx.srx_service = sp->hdr.serviceId;
|
|
call->cid = sp->hdr.cid;
|
|
call->cong_tstamp = skb->tstamp;
|
|
|
|
__set_bit(RXRPC_CALL_EXPOSED, &call->flags);
|
|
rxrpc_set_call_state(call, RXRPC_CALL_SERVER_SECURING);
|
|
|
|
spin_lock(&conn->state_lock);
|
|
|
|
switch (conn->state) {
|
|
case RXRPC_CONN_SERVICE_UNSECURED:
|
|
case RXRPC_CONN_SERVICE_CHALLENGING:
|
|
rxrpc_set_call_state(call, RXRPC_CALL_SERVER_SECURING);
|
|
break;
|
|
case RXRPC_CONN_SERVICE:
|
|
rxrpc_set_call_state(call, RXRPC_CALL_SERVER_RECV_REQUEST);
|
|
break;
|
|
|
|
case RXRPC_CONN_ABORTED:
|
|
rxrpc_set_call_completion(call, conn->completion,
|
|
conn->abort_code, conn->error);
|
|
break;
|
|
default:
|
|
BUG();
|
|
}
|
|
|
|
rxrpc_get_call(call, rxrpc_call_get_io_thread);
|
|
|
|
/* Set the channel for this call. We don't get channel_lock as we're
|
|
* only defending against the data_ready handler (which we're called
|
|
* from) and the RESPONSE packet parser (which is only really
|
|
* interested in call_counter and can cope with a disagreement with the
|
|
* call pointer).
|
|
*/
|
|
chan = sp->hdr.cid & RXRPC_CHANNELMASK;
|
|
conn->channels[chan].call_counter = call->call_id;
|
|
conn->channels[chan].call_id = call->call_id;
|
|
conn->channels[chan].call = call;
|
|
spin_unlock(&conn->state_lock);
|
|
|
|
spin_lock(&conn->peer->lock);
|
|
hlist_add_head(&call->error_link, &conn->peer->error_targets);
|
|
spin_unlock(&conn->peer->lock);
|
|
|
|
rxrpc_start_call_timer(call);
|
|
_leave("");
|
|
}
|
|
|
|
/*
|
|
* Note the re-emergence of a call.
|
|
*/
|
|
void rxrpc_see_call(struct rxrpc_call *call, enum rxrpc_call_trace why)
|
|
{
|
|
if (call) {
|
|
int r = refcount_read(&call->ref);
|
|
|
|
trace_rxrpc_call(call->debug_id, r, 0, why);
|
|
}
|
|
}
|
|
|
|
struct rxrpc_call *rxrpc_try_get_call(struct rxrpc_call *call,
|
|
enum rxrpc_call_trace why)
|
|
{
|
|
int r;
|
|
|
|
if (!call || !__refcount_inc_not_zero(&call->ref, &r))
|
|
return NULL;
|
|
trace_rxrpc_call(call->debug_id, r + 1, 0, why);
|
|
return call;
|
|
}
|
|
|
|
/*
|
|
* Note the addition of a ref on a call.
|
|
*/
|
|
void rxrpc_get_call(struct rxrpc_call *call, enum rxrpc_call_trace why)
|
|
{
|
|
int r;
|
|
|
|
__refcount_inc(&call->ref, &r);
|
|
trace_rxrpc_call(call->debug_id, r + 1, 0, why);
|
|
}
|
|
|
|
/*
|
|
* Clean up the Rx skb ring.
|
|
*/
|
|
static void rxrpc_cleanup_ring(struct rxrpc_call *call)
|
|
{
|
|
skb_queue_purge(&call->recvmsg_queue);
|
|
skb_queue_purge(&call->rx_oos_queue);
|
|
}
|
|
|
|
/*
|
|
* Detach a call from its owning socket.
|
|
*/
|
|
void rxrpc_release_call(struct rxrpc_sock *rx, struct rxrpc_call *call)
|
|
{
|
|
struct rxrpc_connection *conn = call->conn;
|
|
bool put = false, putu = false;
|
|
|
|
_enter("{%d,%d}", call->debug_id, refcount_read(&call->ref));
|
|
|
|
trace_rxrpc_call(call->debug_id, refcount_read(&call->ref),
|
|
call->flags, rxrpc_call_see_release);
|
|
|
|
if (test_and_set_bit(RXRPC_CALL_RELEASED, &call->flags))
|
|
BUG();
|
|
|
|
rxrpc_put_call_slot(call);
|
|
|
|
/* Make sure we don't get any more notifications */
|
|
spin_lock(&rx->recvmsg_lock);
|
|
|
|
if (!list_empty(&call->recvmsg_link)) {
|
|
_debug("unlinking once-pending call %p { e=%lx f=%lx }",
|
|
call, call->events, call->flags);
|
|
list_del(&call->recvmsg_link);
|
|
put = true;
|
|
}
|
|
|
|
/* list_empty() must return false in rxrpc_notify_socket() */
|
|
call->recvmsg_link.next = NULL;
|
|
call->recvmsg_link.prev = NULL;
|
|
|
|
spin_unlock(&rx->recvmsg_lock);
|
|
if (put)
|
|
rxrpc_put_call(call, rxrpc_call_put_unnotify);
|
|
|
|
write_lock(&rx->call_lock);
|
|
|
|
if (test_and_clear_bit(RXRPC_CALL_HAS_USERID, &call->flags)) {
|
|
rb_erase(&call->sock_node, &rx->calls);
|
|
memset(&call->sock_node, 0xdd, sizeof(call->sock_node));
|
|
putu = true;
|
|
}
|
|
|
|
list_del(&call->sock_link);
|
|
write_unlock(&rx->call_lock);
|
|
|
|
_debug("RELEASE CALL %p (%d CONN %p)", call, call->debug_id, conn);
|
|
|
|
if (putu)
|
|
rxrpc_put_call(call, rxrpc_call_put_userid);
|
|
|
|
_leave("");
|
|
}
|
|
|
|
/*
|
|
* release all the calls associated with a socket
|
|
*/
|
|
void rxrpc_release_calls_on_socket(struct rxrpc_sock *rx)
|
|
{
|
|
struct rxrpc_call *call;
|
|
|
|
_enter("%p", rx);
|
|
|
|
while (!list_empty(&rx->to_be_accepted)) {
|
|
call = list_entry(rx->to_be_accepted.next,
|
|
struct rxrpc_call, accept_link);
|
|
list_del(&call->accept_link);
|
|
rxrpc_propose_abort(call, RX_CALL_DEAD, -ECONNRESET,
|
|
rxrpc_abort_call_sock_release_tba);
|
|
rxrpc_put_call(call, rxrpc_call_put_release_sock_tba);
|
|
}
|
|
|
|
while (!list_empty(&rx->sock_calls)) {
|
|
call = list_entry(rx->sock_calls.next,
|
|
struct rxrpc_call, sock_link);
|
|
rxrpc_get_call(call, rxrpc_call_get_release_sock);
|
|
rxrpc_propose_abort(call, RX_CALL_DEAD, -ECONNRESET,
|
|
rxrpc_abort_call_sock_release);
|
|
rxrpc_release_call(rx, call);
|
|
rxrpc_put_call(call, rxrpc_call_put_release_sock);
|
|
}
|
|
|
|
_leave("");
|
|
}
|
|
|
|
/*
|
|
* release a call
|
|
*/
|
|
void rxrpc_put_call(struct rxrpc_call *call, enum rxrpc_call_trace why)
|
|
{
|
|
struct rxrpc_net *rxnet = call->rxnet;
|
|
unsigned int debug_id = call->debug_id;
|
|
bool dead;
|
|
int r;
|
|
|
|
ASSERT(call != NULL);
|
|
|
|
dead = __refcount_dec_and_test(&call->ref, &r);
|
|
trace_rxrpc_call(debug_id, r - 1, 0, why);
|
|
if (dead) {
|
|
ASSERTCMP(__rxrpc_call_state(call), ==, RXRPC_CALL_COMPLETE);
|
|
|
|
if (!list_empty(&call->link)) {
|
|
spin_lock(&rxnet->call_lock);
|
|
list_del_init(&call->link);
|
|
spin_unlock(&rxnet->call_lock);
|
|
}
|
|
|
|
rxrpc_cleanup_call(call);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Free up the call under RCU.
|
|
*/
|
|
static void rxrpc_rcu_free_call(struct rcu_head *rcu)
|
|
{
|
|
struct rxrpc_call *call = container_of(rcu, struct rxrpc_call, rcu);
|
|
struct rxrpc_net *rxnet = READ_ONCE(call->rxnet);
|
|
|
|
kmem_cache_free(rxrpc_call_jar, call);
|
|
if (atomic_dec_and_test(&rxnet->nr_calls))
|
|
wake_up_var(&rxnet->nr_calls);
|
|
}
|
|
|
|
/*
|
|
* Final call destruction - but must be done in process context.
|
|
*/
|
|
static void rxrpc_destroy_call(struct work_struct *work)
|
|
{
|
|
struct rxrpc_call *call = container_of(work, struct rxrpc_call, destroyer);
|
|
struct rxrpc_txbuf *txb;
|
|
|
|
del_timer_sync(&call->timer);
|
|
|
|
rxrpc_cleanup_ring(call);
|
|
while ((txb = list_first_entry_or_null(&call->tx_sendmsg,
|
|
struct rxrpc_txbuf, call_link))) {
|
|
list_del(&txb->call_link);
|
|
rxrpc_put_txbuf(txb, rxrpc_txbuf_put_cleaned);
|
|
}
|
|
while ((txb = list_first_entry_or_null(&call->tx_buffer,
|
|
struct rxrpc_txbuf, call_link))) {
|
|
list_del(&txb->call_link);
|
|
rxrpc_put_txbuf(txb, rxrpc_txbuf_put_cleaned);
|
|
}
|
|
|
|
rxrpc_put_txbuf(call->tx_pending, rxrpc_txbuf_put_cleaned);
|
|
rxrpc_put_connection(call->conn, rxrpc_conn_put_call);
|
|
rxrpc_deactivate_bundle(call->bundle);
|
|
rxrpc_put_bundle(call->bundle, rxrpc_bundle_put_call);
|
|
rxrpc_put_peer(call->peer, rxrpc_peer_put_call);
|
|
rxrpc_put_local(call->local, rxrpc_local_put_call);
|
|
call_rcu(&call->rcu, rxrpc_rcu_free_call);
|
|
}
|
|
|
|
/*
|
|
* clean up a call
|
|
*/
|
|
void rxrpc_cleanup_call(struct rxrpc_call *call)
|
|
{
|
|
memset(&call->sock_node, 0xcd, sizeof(call->sock_node));
|
|
|
|
ASSERTCMP(__rxrpc_call_state(call), ==, RXRPC_CALL_COMPLETE);
|
|
ASSERT(test_bit(RXRPC_CALL_RELEASED, &call->flags));
|
|
|
|
del_timer(&call->timer);
|
|
|
|
if (rcu_read_lock_held())
|
|
/* Can't use the rxrpc workqueue as we need to cancel/flush
|
|
* something that may be running/waiting there.
|
|
*/
|
|
schedule_work(&call->destroyer);
|
|
else
|
|
rxrpc_destroy_call(&call->destroyer);
|
|
}
|
|
|
|
/*
|
|
* Make sure that all calls are gone from a network namespace. To reach this
|
|
* point, any open UDP sockets in that namespace must have been closed, so any
|
|
* outstanding calls cannot be doing I/O.
|
|
*/
|
|
void rxrpc_destroy_all_calls(struct rxrpc_net *rxnet)
|
|
{
|
|
struct rxrpc_call *call;
|
|
|
|
_enter("");
|
|
|
|
if (!list_empty(&rxnet->calls)) {
|
|
spin_lock(&rxnet->call_lock);
|
|
|
|
while (!list_empty(&rxnet->calls)) {
|
|
call = list_entry(rxnet->calls.next,
|
|
struct rxrpc_call, link);
|
|
_debug("Zapping call %p", call);
|
|
|
|
rxrpc_see_call(call, rxrpc_call_see_zap);
|
|
list_del_init(&call->link);
|
|
|
|
pr_err("Call %p still in use (%d,%s,%lx,%lx)!\n",
|
|
call, refcount_read(&call->ref),
|
|
rxrpc_call_states[__rxrpc_call_state(call)],
|
|
call->flags, call->events);
|
|
|
|
spin_unlock(&rxnet->call_lock);
|
|
cond_resched();
|
|
spin_lock(&rxnet->call_lock);
|
|
}
|
|
|
|
spin_unlock(&rxnet->call_lock);
|
|
}
|
|
|
|
atomic_dec(&rxnet->nr_calls);
|
|
wait_var_event(&rxnet->nr_calls, !atomic_read(&rxnet->nr_calls));
|
|
}
|