Commit 8de8c873 authored by Sridhar Samudrala's avatar Sridhar Samudrala
Browse files

[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: default avatarSridhar Samudrala <sri@us.ibm.com>
parent ee433530
......@@ -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;
......
......@@ -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;
......
......@@ -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);
......
......@@ -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);
......
......@@ -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);
......
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