From 8de8c8738086501bbe3057ed6f4b70dded657488 Mon Sep 17 00:00:00 2001 From: Sridhar Samudrala Date: Fri, 19 May 2006 10:58:12 -0700 Subject: [PATCH] [SCTP]: Set sk_err so that poll wakes up after a non-blocking connect failure. Also fix some other cases where sk_err is not set for 1-1 style sockets. Signed-off-by: Sridhar Samudrala --- include/net/sctp/command.h | 1 + net/sctp/input.c | 4 +-- net/sctp/sm_sideeffect.c | 16 +++++++--- net/sctp/sm_statefuns.c | 75 +++++++++++++++++++++++++++++----------------- net/sctp/socket.c | 1 + 5 files changed, 64 insertions(+), 33 deletions(-) diff --git a/include/net/sctp/command.h b/include/net/sctp/command.h index 34a1a09e5ae..807d6f1ef4b 100644 --- a/include/net/sctp/command.h +++ b/include/net/sctp/command.h @@ -99,6 +99,7 @@ typedef enum { SCTP_CMD_DEL_NON_PRIMARY, /* Removes non-primary peer transports. */ SCTP_CMD_T3_RTX_TIMERS_STOP, /* Stops T3-rtx pending timers */ SCTP_CMD_FORCE_PRIM_RETRAN, /* Forces retrans. over primary path. */ + SCTP_CMD_SET_SK_ERR, /* Set sk_err */ SCTP_CMD_LAST } sctp_verb_t; diff --git a/net/sctp/input.c b/net/sctp/input.c index d117ebc75cf..7523f4df2da 100644 --- a/net/sctp/input.c +++ b/net/sctp/input.c @@ -412,7 +412,7 @@ struct sock *sctp_err_lookup(int family, struct sk_buff *skb, union sctp_addr daddr; struct sctp_af *af; struct sock *sk = NULL; - struct sctp_association *asoc = NULL; + struct sctp_association *asoc; struct sctp_transport *transport = NULL; *app = NULL; *tpp = NULL; @@ -490,7 +490,7 @@ void sctp_v4_err(struct sk_buff *skb, __u32 info) int type = skb->h.icmph->type; int code = skb->h.icmph->code; struct sock *sk; - struct sctp_association *asoc; + struct sctp_association *asoc = NULL; struct sctp_transport *transport; struct inet_sock *inet; char *saveip, *savesctp; diff --git a/net/sctp/sm_sideeffect.c b/net/sctp/sm_sideeffect.c index 8d1dc24bab4..c5beb2ad7ef 100644 --- a/net/sctp/sm_sideeffect.c +++ b/net/sctp/sm_sideeffect.c @@ -498,10 +498,6 @@ static void sctp_cmd_assoc_failed(sctp_cmd_seq_t *commands, sctp_add_cmd_sf(commands, SCTP_CMD_NEW_STATE, SCTP_STATE(SCTP_STATE_CLOSED)); - /* Set sk_err to ECONNRESET on a 1-1 style socket. */ - if (!sctp_style(asoc->base.sk, UDP)) - asoc->base.sk->sk_err = ECONNRESET; - /* SEND_FAILED sent later when cleaning up the association. */ asoc->outqueue.error = error; sctp_add_cmd_sf(commands, SCTP_CMD_DELETE_TCB, SCTP_NULL()); @@ -838,6 +834,15 @@ static void sctp_cmd_del_non_primary(struct sctp_association *asoc) return; } +/* Helper function to set sk_err on a 1-1 style socket. */ +static void sctp_cmd_set_sk_err(struct sctp_association *asoc, int error) +{ + struct sock *sk = asoc->base.sk; + + if (!sctp_style(sk, UDP)) + sk->sk_err = error; +} + /* These three macros allow us to pull the debugging code out of the * main flow of sctp_do_sm() to keep attention focused on the real * functionality there. @@ -1458,6 +1463,9 @@ static int sctp_cmd_interpreter(sctp_event_t event_type, local_cork = 0; asoc->peer.retran_path = t; break; + case SCTP_CMD_SET_SK_ERR: + sctp_cmd_set_sk_err(asoc, cmd->obj.error); + break; default: printk(KERN_WARNING "Impossible command: %u, %p\n", cmd->verb, cmd->obj.ptr); diff --git a/net/sctp/sm_statefuns.c b/net/sctp/sm_statefuns.c index 8cdba51ec07..174f7a7c6cd 100644 --- a/net/sctp/sm_statefuns.c +++ b/net/sctp/sm_statefuns.c @@ -93,7 +93,7 @@ static sctp_disposition_t sctp_sf_shut_8_4_5(const struct sctp_endpoint *ep, static struct sctp_sackhdr *sctp_sm_pull_sack(struct sctp_chunk *chunk); static sctp_disposition_t sctp_stop_t1_and_abort(sctp_cmd_seq_t *commands, - __u16 error, + __u16 error, int sk_err, const struct sctp_association *asoc, struct sctp_transport *transport); @@ -448,7 +448,7 @@ sctp_disposition_t sctp_sf_do_5_1C_ack(const struct sctp_endpoint *ep, __u32 init_tag; struct sctp_chunk *err_chunk; struct sctp_packet *packet; - sctp_disposition_t ret; + __u16 error; if (!sctp_vtag_verify(chunk, asoc)) return sctp_sf_pdiscard(ep, asoc, type, arg, commands); @@ -480,11 +480,9 @@ sctp_disposition_t sctp_sf_do_5_1C_ack(const struct sctp_endpoint *ep, goto nomem; sctp_add_cmd_sf(commands, SCTP_CMD_REPLY, SCTP_CHUNK(reply)); - sctp_add_cmd_sf(commands, SCTP_CMD_NEW_STATE, - SCTP_STATE(SCTP_STATE_CLOSED)); - SCTP_INC_STATS(SCTP_MIB_ABORTEDS); - sctp_add_cmd_sf(commands, SCTP_CMD_DELETE_TCB, SCTP_NULL()); - return SCTP_DISPOSITION_DELETE_TCB; + return sctp_stop_t1_and_abort(commands, SCTP_ERROR_INV_PARAM, + ECONNREFUSED, asoc, + chunk->transport); } /* Verify the INIT chunk before processing it. */ @@ -511,27 +509,16 @@ sctp_disposition_t sctp_sf_do_5_1C_ack(const struct sctp_endpoint *ep, sctp_add_cmd_sf(commands, SCTP_CMD_SEND_PKT, SCTP_PACKET(packet)); SCTP_INC_STATS(SCTP_MIB_OUTCTRLCHUNKS); - sctp_add_cmd_sf(commands, SCTP_CMD_NEW_STATE, - SCTP_STATE(SCTP_STATE_CLOSED)); - sctp_add_cmd_sf(commands, SCTP_CMD_DELETE_TCB, - SCTP_NULL()); - return SCTP_DISPOSITION_CONSUME; + error = SCTP_ERROR_INV_PARAM; } else { - sctp_add_cmd_sf(commands, SCTP_CMD_NEW_STATE, - SCTP_STATE(SCTP_STATE_CLOSED)); - sctp_add_cmd_sf(commands, SCTP_CMD_DELETE_TCB, - SCTP_NULL()); - return SCTP_DISPOSITION_NOMEM; + error = SCTP_ERROR_NO_RESOURCE; } } else { - ret = sctp_sf_tabort_8_4_8(ep, asoc, type, arg, - commands); - sctp_add_cmd_sf(commands, SCTP_CMD_NEW_STATE, - SCTP_STATE(SCTP_STATE_CLOSED)); - sctp_add_cmd_sf(commands, SCTP_CMD_DELETE_TCB, - SCTP_NULL()); - return ret; + sctp_sf_tabort_8_4_8(ep, asoc, type, arg, commands); + error = SCTP_ERROR_INV_PARAM; } + return sctp_stop_t1_and_abort(commands, error, ECONNREFUSED, + asoc, chunk->transport); } /* Tag the variable length parameters. Note that we never @@ -886,6 +873,8 @@ sctp_disposition_t sctp_sf_sendbeat_8_3(const struct sctp_endpoint *ep, struct sctp_transport *transport = (struct sctp_transport *) arg; if (asoc->overall_error_count >= asoc->max_retrans) { + sctp_add_cmd_sf(commands, SCTP_CMD_SET_SK_ERR, + SCTP_ERROR(ETIMEDOUT)); /* CMD_ASSOC_FAILED calls CMD_DELETE_TCB. */ sctp_add_cmd_sf(commands, SCTP_CMD_ASSOC_FAILED, SCTP_U32(SCTP_ERROR_NO_ERROR)); @@ -2126,6 +2115,8 @@ static sctp_disposition_t sctp_sf_do_5_2_6_stale(const struct sctp_endpoint *ep, int attempts = asoc->init_err_counter + 1; if (attempts > asoc->max_init_attempts) { + sctp_add_cmd_sf(commands, SCTP_CMD_SET_SK_ERR, + SCTP_ERROR(ETIMEDOUT)); sctp_add_cmd_sf(commands, SCTP_CMD_INIT_FAILED, SCTP_U32(SCTP_ERROR_STALE_COOKIE)); return SCTP_DISPOSITION_DELETE_TCB; @@ -2262,6 +2253,7 @@ sctp_disposition_t sctp_sf_do_9_1_abort(const struct sctp_endpoint *ep, if (len >= sizeof(struct sctp_chunkhdr) + sizeof(struct sctp_errhdr)) error = ((sctp_errhdr_t *)chunk->skb->data)->cause; + sctp_add_cmd_sf(commands, SCTP_CMD_SET_SK_ERR, SCTP_ERROR(ECONNRESET)); /* ASSOC_FAILED will DELETE_TCB. */ sctp_add_cmd_sf(commands, SCTP_CMD_ASSOC_FAILED, SCTP_U32(error)); SCTP_INC_STATS(SCTP_MIB_ABORTEDS); @@ -2306,7 +2298,8 @@ sctp_disposition_t sctp_sf_cookie_wait_abort(const struct sctp_endpoint *ep, if (len >= sizeof(struct sctp_chunkhdr) + sizeof(struct sctp_errhdr)) error = ((sctp_errhdr_t *)chunk->skb->data)->cause; - return sctp_stop_t1_and_abort(commands, error, asoc, chunk->transport); + return sctp_stop_t1_and_abort(commands, error, ECONNREFUSED, asoc, + chunk->transport); } /* @@ -2318,7 +2311,8 @@ sctp_disposition_t sctp_sf_cookie_wait_icmp_abort(const struct sctp_endpoint *ep void *arg, sctp_cmd_seq_t *commands) { - return sctp_stop_t1_and_abort(commands, SCTP_ERROR_NO_ERROR, asoc, + return sctp_stop_t1_and_abort(commands, SCTP_ERROR_NO_ERROR, + ENOPROTOOPT, asoc, (struct sctp_transport *)arg); } @@ -2343,7 +2337,7 @@ sctp_disposition_t sctp_sf_cookie_echoed_abort(const struct sctp_endpoint *ep, * This is common code called by several sctp_sf_*_abort() functions above. */ static sctp_disposition_t sctp_stop_t1_and_abort(sctp_cmd_seq_t *commands, - __u16 error, + __u16 error, int sk_err, const struct sctp_association *asoc, struct sctp_transport *transport) { @@ -2353,6 +2347,7 @@ static sctp_disposition_t sctp_stop_t1_and_abort(sctp_cmd_seq_t *commands, SCTP_INC_STATS(SCTP_MIB_ABORTEDS); sctp_add_cmd_sf(commands, SCTP_CMD_TIMER_STOP, SCTP_TO(SCTP_EVENT_TIMEOUT_T1_INIT)); + sctp_add_cmd_sf(commands, SCTP_CMD_SET_SK_ERR, SCTP_ERROR(sk_err)); /* CMD_INIT_FAILED will DELETE_TCB. */ sctp_add_cmd_sf(commands, SCTP_CMD_INIT_FAILED, SCTP_U32(error)); @@ -3336,6 +3331,8 @@ sctp_disposition_t sctp_sf_do_asconf_ack(const struct sctp_endpoint *ep, sctp_add_cmd_sf(commands, SCTP_CMD_TIMER_STOP, SCTP_TO(SCTP_EVENT_TIMEOUT_T4_RTO)); sctp_add_cmd_sf(commands, SCTP_CMD_DISCARD_PACKET,SCTP_NULL()); + sctp_add_cmd_sf(commands, SCTP_CMD_SET_SK_ERR, + SCTP_ERROR(ECONNABORTED)); sctp_add_cmd_sf(commands, SCTP_CMD_ASSOC_FAILED, SCTP_U32(SCTP_ERROR_ASCONF_ACK)); SCTP_INC_STATS(SCTP_MIB_ABORTEDS); @@ -3362,6 +3359,8 @@ sctp_disposition_t sctp_sf_do_asconf_ack(const struct sctp_endpoint *ep, * processing the rest of the chunks in the packet. */ sctp_add_cmd_sf(commands, SCTP_CMD_DISCARD_PACKET,SCTP_NULL()); + sctp_add_cmd_sf(commands, SCTP_CMD_SET_SK_ERR, + SCTP_ERROR(ECONNABORTED)); sctp_add_cmd_sf(commands, SCTP_CMD_ASSOC_FAILED, SCTP_U32(SCTP_ERROR_ASCONF_ACK)); SCTP_INC_STATS(SCTP_MIB_ABORTEDS); @@ -3714,9 +3713,13 @@ static sctp_disposition_t sctp_sf_violation_chunklen( if (asoc->state <= SCTP_STATE_COOKIE_ECHOED) { sctp_add_cmd_sf(commands, SCTP_CMD_TIMER_STOP, SCTP_TO(SCTP_EVENT_TIMEOUT_T1_INIT)); + sctp_add_cmd_sf(commands, SCTP_CMD_SET_SK_ERR, + SCTP_ERROR(ECONNREFUSED)); sctp_add_cmd_sf(commands, SCTP_CMD_INIT_FAILED, SCTP_U32(SCTP_ERROR_PROTO_VIOLATION)); } else { + sctp_add_cmd_sf(commands, SCTP_CMD_SET_SK_ERR, + SCTP_ERROR(ECONNABORTED)); sctp_add_cmd_sf(commands, SCTP_CMD_ASSOC_FAILED, SCTP_U32(SCTP_ERROR_PROTO_VIOLATION)); SCTP_DEC_STATS(SCTP_MIB_CURRESTAB); @@ -4034,6 +4037,8 @@ sctp_disposition_t sctp_sf_do_9_1_prm_abort( * TCB. This is a departure from our typical NOMEM handling. */ + sctp_add_cmd_sf(commands, SCTP_CMD_SET_SK_ERR, + SCTP_ERROR(ECONNABORTED)); /* Delete the established association. */ sctp_add_cmd_sf(commands, SCTP_CMD_ASSOC_FAILED, SCTP_U32(SCTP_ERROR_USER_ABORT)); @@ -4175,6 +4180,8 @@ sctp_disposition_t sctp_sf_cookie_wait_prm_abort( * TCB. This is a departure from our typical NOMEM handling. */ + sctp_add_cmd_sf(commands, SCTP_CMD_SET_SK_ERR, + SCTP_ERROR(ECONNREFUSED)); /* Delete the established association. */ sctp_add_cmd_sf(commands, SCTP_CMD_INIT_FAILED, SCTP_U32(SCTP_ERROR_USER_ABORT)); @@ -4543,6 +4550,8 @@ sctp_disposition_t sctp_sf_do_6_3_3_rtx(const struct sctp_endpoint *ep, struct sctp_transport *transport = arg; if (asoc->overall_error_count >= asoc->max_retrans) { + sctp_add_cmd_sf(commands, SCTP_CMD_SET_SK_ERR, + SCTP_ERROR(ETIMEDOUT)); /* CMD_ASSOC_FAILED calls CMD_DELETE_TCB. */ sctp_add_cmd_sf(commands, SCTP_CMD_ASSOC_FAILED, SCTP_U32(SCTP_ERROR_NO_ERROR)); @@ -4662,6 +4671,8 @@ sctp_disposition_t sctp_sf_t1_init_timer_expire(const struct sctp_endpoint *ep, SCTP_DEBUG_PRINTK("Giving up on INIT, attempts: %d" " max_init_attempts: %d\n", attempts, asoc->max_init_attempts); + sctp_add_cmd_sf(commands, SCTP_CMD_SET_SK_ERR, + SCTP_ERROR(ETIMEDOUT)); sctp_add_cmd_sf(commands, SCTP_CMD_INIT_FAILED, SCTP_U32(SCTP_ERROR_NO_ERROR)); return SCTP_DISPOSITION_DELETE_TCB; @@ -4711,6 +4722,8 @@ sctp_disposition_t sctp_sf_t1_cookie_timer_expire(const struct sctp_endpoint *ep sctp_add_cmd_sf(commands, SCTP_CMD_REPLY, SCTP_CHUNK(repl)); } else { + sctp_add_cmd_sf(commands, SCTP_CMD_SET_SK_ERR, + SCTP_ERROR(ETIMEDOUT)); sctp_add_cmd_sf(commands, SCTP_CMD_INIT_FAILED, SCTP_U32(SCTP_ERROR_NO_ERROR)); return SCTP_DISPOSITION_DELETE_TCB; @@ -4742,6 +4755,8 @@ sctp_disposition_t sctp_sf_t2_timer_expire(const struct sctp_endpoint *ep, SCTP_DEBUG_PRINTK("Timer T2 expired.\n"); if (asoc->overall_error_count >= asoc->max_retrans) { + sctp_add_cmd_sf(commands, SCTP_CMD_SET_SK_ERR, + SCTP_ERROR(ETIMEDOUT)); /* Note: CMD_ASSOC_FAILED calls CMD_DELETE_TCB. */ sctp_add_cmd_sf(commands, SCTP_CMD_ASSOC_FAILED, SCTP_U32(SCTP_ERROR_NO_ERROR)); @@ -4817,6 +4832,8 @@ sctp_disposition_t sctp_sf_t4_timer_expire( if (asoc->overall_error_count >= asoc->max_retrans) { sctp_add_cmd_sf(commands, SCTP_CMD_TIMER_STOP, SCTP_TO(SCTP_EVENT_TIMEOUT_T4_RTO)); + sctp_add_cmd_sf(commands, SCTP_CMD_SET_SK_ERR, + SCTP_ERROR(ETIMEDOUT)); sctp_add_cmd_sf(commands, SCTP_CMD_ASSOC_FAILED, SCTP_U32(SCTP_ERROR_NO_ERROR)); SCTP_INC_STATS(SCTP_MIB_ABORTEDS); @@ -4870,6 +4887,8 @@ sctp_disposition_t sctp_sf_t5_timer_expire(const struct sctp_endpoint *ep, goto nomem; sctp_add_cmd_sf(commands, SCTP_CMD_REPLY, SCTP_CHUNK(reply)); + sctp_add_cmd_sf(commands, SCTP_CMD_SET_SK_ERR, + SCTP_ERROR(ETIMEDOUT)); sctp_add_cmd_sf(commands, SCTP_CMD_ASSOC_FAILED, SCTP_U32(SCTP_ERROR_NO_ERROR)); @@ -5309,6 +5328,8 @@ static int sctp_eat_data(const struct sctp_association *asoc, * processing the rest of the chunks in the packet. */ sctp_add_cmd_sf(commands, SCTP_CMD_DISCARD_PACKET,SCTP_NULL()); + sctp_add_cmd_sf(commands, SCTP_CMD_SET_SK_ERR, + SCTP_ERROR(ECONNABORTED)); sctp_add_cmd_sf(commands, SCTP_CMD_ASSOC_FAILED, SCTP_U32(SCTP_ERROR_NO_DATA)); SCTP_INC_STATS(SCTP_MIB_ABORTEDS); diff --git a/net/sctp/socket.c b/net/sctp/socket.c index b6e4b89539b..90863307bcd 100644 --- a/net/sctp/socket.c +++ b/net/sctp/socket.c @@ -1057,6 +1057,7 @@ static int __sctp_connect(struct sock* sk, inet_sk(sk)->dport = htons(asoc->peer.port); af = sctp_get_af_specific(to.sa.sa_family); af->to_sk_daddr(&to, sk); + sk->sk_err = 0; timeo = sock_sndtimeo(sk, sk->sk_socket->file->f_flags & O_NONBLOCK); err = sctp_wait_for_connect(asoc, &timeo); -- 2.11.4.GIT