MINOR: spoe: Add status code in error variable instead of hardcoded value
Now, when option "set-on-error" is enabled, we set a status code representing the error occurred instead of "true". For values under 256, it represents an error coming from the engine. Below 256, it reports a SPOP error. In this case, to retrieve the right SPOP status code, you must remove 256 to this value. Here are possible values: * 1: a timeout occurred during the event processing. * 2: an error was triggered during the ressources allocation. * 255: an unknown error occurred during the event processing. * 256+N: a SPOP error occurred during the event processing.
This commit is contained in:
Christopher Faulet
Willy Tarreau
parent
42bfa46234
commit
b067b06fc7
21
doc/SPOE.txt
21
doc/SPOE.txt
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@ -217,9 +217,22 @@ option set-on-error <var name>
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prefixed. So, if your variable name is "error" and your prefix is
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"my_spoe_pfx", the variable will be "txn.my_spoe_pfx.error".
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When set, the variable is the boolean "true". Note that if "option
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continue-on-error" is set, the variable is not automatically removed between
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events processing.
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When set, the variable is an integer representing the error reason. For values
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under 256, it represents an error coming from the engine. Below 256, it
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reports a SPOP error. In this case, to retrieve the right SPOP status code,
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you must remove 256 to this value. Here are possible values:
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* 1 a timeout occurred during the event processing.
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* 2 an error was triggered during the ressources allocation.
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* 255 an unknown error occurred during the event processing.
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* 256+N a SPOP error occurred during the event processing (see section
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"Errors & timeouts").
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Note that if "option continue-on-error" is set, the variable is not
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automatically removed between events processing.
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See also: "option continue-on-error", "option var-prefix".
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@ -341,7 +354,7 @@ event <name>
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- on-backend-http-request
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- on-http-response
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See section 3.5 about Events.
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See section "Events & Messages".
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2.4. Example
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-------------
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135
src/flt_spoe.c
135
src/flt_spoe.c
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@ -119,6 +119,15 @@ enum spoe_event {
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SPOE_EV_EVENTS
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};
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/* Errors triggered by streams */
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enum spoe_context_error {
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SPOE_CTX_ERR_NONE = 0,
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SPOE_CTX_ERR_TOUT,
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SPOE_CTX_ERR_RES,
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SPOE_CTX_ERR_UNKNOWN = 255,
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SPOE_CTX_ERRS,
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};
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/* Errors triggerd by SPOE applet */
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enum spoe_frame_error {
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SPOE_FRM_ERR_NONE = 0,
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@ -243,6 +252,7 @@ struct spoe_context {
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enum spoe_ctx_state state; /* SPOE_CTX_ST_* */
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unsigned int flags; /* SPOE_CTX_FL_* */
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unsigned int status_code; /* SPOE_CTX_ERR_* */
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unsigned int stream_id; /* stream_id and frame_id are used */
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unsigned int frame_id; /* to map NOTIFY and ACK frames */
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@ -259,6 +269,7 @@ struct spoe_appctx {
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unsigned int max_frame_size; /* the negotiated max-frame-size value */
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unsigned int flags; /* SPOE_APPCTX_FL_* */
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unsigned int status_code; /* SPOE_FRM_ERR_* */
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struct list waiting_queue; /* list of streams waiting for a ACK frame, in sync and pipelining mode */
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struct list list; /* next spoe appctx for the same agent */
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};
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@ -793,8 +804,10 @@ prepare_spoe_hahello_frame(struct appctx *appctx, char *frame, size_t size)
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+ 1 + SLEN(CAPABILITIES_KEY) + 1 + 1 + SLEN(CAPABILITIES_VAL)
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+ 1 + SLEN(ENGINE_ID_KEY) + 1 + 1 + 36);
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if (size < max)
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if (size < max) {
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spoe_status_code = SPOE_FRM_ERR_TOO_BIG;
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return -1;
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}
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/* Frame type */
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frame[idx++] = SPOE_FRM_T_HAPROXY_HELLO;
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@ -890,9 +903,6 @@ prepare_spoe_hanotify_frame(struct appctx *appctx, struct spoe_context *ctx,
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{
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int idx = 0;
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if (size < SPOE_APPCTX(appctx)->max_frame_size)
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return -1;
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frame[idx++] = SPOE_FRM_T_HAPROXY_NOTIFY;
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/* No flags for now */
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@ -904,8 +914,10 @@ prepare_spoe_hanotify_frame(struct appctx *appctx, struct spoe_context *ctx,
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idx += encode_spoe_varint(ctx->frame_id, frame+idx);
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/* Copy encoded messages */
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if (idx + ctx->buffer->i > size)
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if (idx + ctx->buffer->i > size) {
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spoe_status_code = SPOE_FRM_ERR_TOO_BIG;
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return 0;
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}
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/* Copy encoded messages */
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memcpy(frame+idx, ctx->buffer->p, ctx->buffer->i);
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@ -1218,7 +1230,7 @@ handle_spoe_agentack_frame(struct appctx *appctx, char *frame, size_t size)
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return 0;
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found:
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if (acquire_spoe_buffer(ctx) <= 0)
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if (!acquire_spoe_buffer(ctx))
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return 1; /* Retry later */
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/* Copy encoded actions */
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@ -1327,6 +1339,7 @@ send_spoe_frame(struct appctx *appctx, char *buf, size_t framesz)
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if (ret <= 0) {
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if (ret == -1)
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return 1; /* retry */
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spoe_status_code = SPOE_FRM_ERR_IO;
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return -1; /* error */
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}
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return framesz;
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@ -1411,6 +1424,8 @@ release_spoe_applet(struct appctx *appctx)
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si_shutr(si);
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si_ic(si)->flags |= CF_READ_NULL;
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appctx->st0 = SPOE_APPCTX_ST_END;
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if (SPOE_APPCTX(appctx)->status_code == SPOE_FRM_ERR_NONE)
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SPOE_APPCTX(appctx)->status_code = SPOE_FRM_ERR_IO;
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}
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if (SPOE_APPCTX(appctx)->task) {
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@ -1422,6 +1437,7 @@ release_spoe_applet(struct appctx *appctx)
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LIST_DEL(&ctx->list);
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LIST_INIT(&ctx->list);
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ctx->state = SPOE_CTX_ST_ERROR;
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ctx->status_code = (SPOE_APPCTX(appctx)->status_code + 0x100);
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task_wakeup(ctx->strm->task, TASK_WOKEN_MSG);
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}
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@ -1434,6 +1450,7 @@ release_spoe_applet(struct appctx *appctx)
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LIST_DEL(&ctx->list);
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LIST_INIT(&ctx->list);
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ctx->state = SPOE_CTX_ST_ERROR;
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ctx->status_code = (SPOE_APPCTX(appctx)->status_code + 0x100);
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task_wakeup(ctx->strm->task, TASK_WOKEN_MSG);
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}
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@ -1441,6 +1458,7 @@ release_spoe_applet(struct appctx *appctx)
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LIST_DEL(&ctx->list);
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LIST_INIT(&ctx->list);
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ctx->state = SPOE_CTX_ST_ERROR;
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ctx->status_code = (SPOE_APPCTX(appctx)->status_code + 0x100);
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task_wakeup(ctx->strm->task, TASK_WOKEN_MSG);
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}
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}
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@ -1458,12 +1476,15 @@ handle_connect_spoe_applet(struct appctx *appctx)
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task_wakeup(si_strm(si)->task, TASK_WOKEN_MSG);
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goto stop;
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}
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if (si->state != SI_ST_EST)
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if (si->state != SI_ST_EST) {
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spoe_status_code = SPOE_FRM_ERR_IO;
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goto exit;
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}
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if (appctx->st1 == SPOE_APPCTX_ERR_TOUT) {
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SPOE_PRINTF(stderr, "%d.%06d [SPOE/%-15s] %s: appctx=%p - Connection timed out\n",
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(int)now.tv_sec, (int)now.tv_usec, agent->id, __FUNCTION__, appctx);
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spoe_status_code = SPOE_FRM_ERR_TOUT;
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goto exit;
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}
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@ -1495,6 +1516,7 @@ handle_connect_spoe_applet(struct appctx *appctx)
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stop:
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return 1;
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exit:
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SPOE_APPCTX(appctx)->status_code = spoe_status_code;
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appctx->st0 = SPOE_APPCTX_ST_EXIT;
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return 0;
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}
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@ -1508,12 +1530,15 @@ handle_connecting_spoe_applet(struct appctx *appctx)
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int ret, framesz = 0;
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if (si->state == SI_ST_CLO || si_opposite(si)->state == SI_ST_CLO)
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if (si->state == SI_ST_CLO || si_opposite(si)->state == SI_ST_CLO) {
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spoe_status_code = SPOE_FRM_ERR_IO;
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goto exit;
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}
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if (appctx->st1 == SPOE_APPCTX_ERR_TOUT) {
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SPOE_PRINTF(stderr, "%d.%06d [SPOE/%-15s] %s: appctx=%p - Connection timed out\n",
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(int)now.tv_sec, (int)now.tv_usec, agent->id, __FUNCTION__, appctx);
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spoe_status_code = SPOE_FRM_ERR_TOUT;
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goto exit;
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}
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@ -1562,6 +1587,7 @@ handle_connecting_spoe_applet(struct appctx *appctx)
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stop:
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return 1;
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exit:
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SPOE_APPCTX(appctx)->status_code = spoe_status_code;
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appctx->st0 = SPOE_APPCTX_ST_EXIT;
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return 0;
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}
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@ -1576,8 +1602,10 @@ handle_processing_spoe_applet(struct appctx *appctx)
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unsigned int fpa = 0;
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int ret, framesz = 0, skip_sending = 0, skip_receiving = 0;
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if (si->state == SI_ST_CLO || si_opposite(si)->state == SI_ST_CLO)
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if (si->state == SI_ST_CLO || si_opposite(si)->state == SI_ST_CLO) {
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spoe_status_code = SPOE_FRM_ERR_IO;
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goto exit;
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}
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if (appctx->st1 == SPOE_APPCTX_ERR_TOUT) {
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spoe_status_code = SPOE_FRM_ERR_TOUT;
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@ -1617,6 +1645,7 @@ handle_processing_spoe_applet(struct appctx *appctx)
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case 0: /* ignore */
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agent->sending_rate++;
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ctx->state = SPOE_CTX_ST_ERROR;
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ctx->status_code = (spoe_status_code + 0x100);
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release_spoe_buffer(ctx);
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task_wakeup(ctx->strm->task, TASK_WOKEN_MSG);
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LIST_DEL(&ctx->list);
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@ -1702,6 +1731,7 @@ handle_processing_spoe_applet(struct appctx *appctx)
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return 1;
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exit:
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SPOE_APPCTX(appctx)->status_code = spoe_status_code;
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appctx->st0 = SPOE_APPCTX_ST_EXIT;
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return 0;
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}
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@ -1714,6 +1744,8 @@ handle_disconnect_spoe_applet(struct appctx *appctx)
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char *frame = trash.str;
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int ret;
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SPOE_APPCTX(appctx)->status_code = spoe_status_code;
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if (si->state == SI_ST_CLO || si_opposite(si)->state == SI_ST_CLO)
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goto exit;
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@ -1763,11 +1795,15 @@ handle_disconnecting_spoe_applet(struct appctx *appctx)
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char *frame = trash.str;
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int ret, framesz = 0;
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if (si->state == SI_ST_CLO || si_opposite(si)->state == SI_ST_CLO)
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if (si->state == SI_ST_CLO || si_opposite(si)->state == SI_ST_CLO) {
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spoe_status_code = SPOE_FRM_ERR_IO;
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goto exit;
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}
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if (appctx->st1 == SPOE_APPCTX_ERR_TOUT)
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if (appctx->st1 == SPOE_APPCTX_ERR_TOUT) {
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spoe_status_code = SPOE_FRM_ERR_TOUT;
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goto exit;
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}
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framesz = 0;
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ret = recv_spoe_frame(appctx, frame, SPOE_APPCTX(appctx)->max_frame_size);
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@ -1813,6 +1849,8 @@ handle_disconnecting_spoe_applet(struct appctx *appctx)
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stop:
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return 1;
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exit:
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if (SPOE_APPCTX(appctx)->status_code == SPOE_FRM_ERR_NONE)
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SPOE_APPCTX(appctx)->status_code = spoe_status_code;
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appctx->st0 = SPOE_APPCTX_ST_EXIT;
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return 0;
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}
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@ -1824,6 +1862,8 @@ handle_spoe_applet(struct appctx *appctx)
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struct stream_interface *si = appctx->owner;
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struct spoe_agent *agent = SPOE_APPCTX(appctx)->agent;
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spoe_status_code = SPOE_FRM_ERR_NONE;
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switchstate:
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SPOE_PRINTF(stderr, "%d.%06d [SPOE/%-15s] %s: appctx=%p"
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" - appctx-state=%s\n",
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@ -1832,7 +1872,6 @@ handle_spoe_applet(struct appctx *appctx)
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switch (appctx->st0) {
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case SPOE_APPCTX_ST_CONNECT:
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spoe_status_code = SPOE_FRM_ERR_NONE;
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if (handle_connect_spoe_applet(appctx))
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goto out;
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goto switchstate;
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@ -1923,6 +1962,7 @@ create_spoe_appctx(struct spoe_config *conf)
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SPOE_APPCTX(appctx)->version = 0;
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SPOE_APPCTX(appctx)->max_frame_size = conf->agent->max_frame_size;
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SPOE_APPCTX(appctx)->flags = 0;
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SPOE_APPCTX(appctx)->status_code = SPOE_FRM_ERR_NONE;
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LIST_INIT(&SPOE_APPCTX(appctx)->list);
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LIST_INIT(&SPOE_APPCTX(appctx)->waiting_queue);
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@ -2330,15 +2370,13 @@ process_spoe_actions(struct stream *s, struct spoe_context *ctx,
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static int
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start_event_processing(struct spoe_context *ctx, int dir)
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{
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int ret;
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/* If a process is already started for this SPOE context, retry
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* later. */
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if (ctx->flags & SPOE_CTX_FL_PROCESS)
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goto wait;
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ret = acquire_spoe_buffer(ctx);
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if (ret <= 0)
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return ret;
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if (!acquire_spoe_buffer(ctx))
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goto wait;
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/* Set the right flag to prevent request and response processing
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* in same time. */
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@ -2358,6 +2396,8 @@ stop_event_processing(struct spoe_context *ctx)
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/* Reset the flag to allow next processing */
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ctx->flags &= ~SPOE_CTX_FL_PROCESS;
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ctx->status_code = 0;
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/* Reset processing timer */
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ctx->process_exp = TICK_ETERNITY;
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@ -2405,6 +2445,7 @@ process_spoe_event(struct stream *s, struct spoe_context *ctx,
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send_log(ctx->strm->be, LOG_WARNING,
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"failed to process event '%s': timeout.\n",
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spoe_event_str[ev]);
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ctx->status_code = SPOE_CTX_ERR_TOUT;
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goto error;
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}
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@ -2425,21 +2466,17 @@ process_spoe_event(struct stream *s, struct spoe_context *ctx,
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ctx->process_exp);
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}
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ret = start_event_processing(ctx, dir);
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if (ret <= 0) {
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if (!ret)
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goto out;
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goto error;
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}
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if (!ret)
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goto out;
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ret = process_spoe_messages(s, ctx, &(ctx->messages[ev]), dir);
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if (ret <= 0) {
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if (!ret)
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goto skip;
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if (!ret)
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goto skip;
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if (!queue_spoe_context(ctx)) {
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ctx->status_code = SPOE_CTX_ERR_RES;
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goto error;
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}
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if (!queue_spoe_context(ctx))
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goto error;
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ctx->state = SPOE_CTX_ST_SENDING_MSGS;
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/* fall through */
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}
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@ -2452,11 +2489,8 @@ process_spoe_event(struct stream *s, struct spoe_context *ctx,
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if (ctx->state == SPOE_CTX_ST_DONE) {
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ret = process_spoe_actions(s, ctx, ev, dir);
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if (ret <= 0) {
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if (!ret)
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goto skip;
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goto error;
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}
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if (!ret)
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goto skip;
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ctx->frame_id++;
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ctx->state = SPOE_CTX_ST_READY;
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goto end;
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@ -2475,7 +2509,7 @@ process_spoe_event(struct stream *s, struct spoe_context *ctx,
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// FIXME: Get the error code here
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memset(&smp, 0, sizeof(smp));
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smp_set_owner(&smp, s->be, s->sess, s, dir|SMP_OPT_FINAL);
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smp.data.u.sint = 1;
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smp.data.u.sint = ctx->status_code;
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smp.data.type = SMP_T_BOOL;
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set_spoe_var(ctx, "txn", agent->var_on_error,
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@ -2484,7 +2518,7 @@ process_spoe_event(struct stream *s, struct spoe_context *ctx,
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ctx->state = ((agent->flags & SPOE_FL_CONT_ON_ERR)
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? SPOE_CTX_ST_READY
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: SPOE_CTX_ST_ERROR);
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: SPOE_CTX_ST_NONE);
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ret = 1;
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goto end;
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@ -2550,11 +2584,12 @@ create_spoe_context(struct filter *filter)
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return NULL;
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}
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memset(ctx, 0, sizeof(*ctx));
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ctx->filter = filter;
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ctx->state = SPOE_CTX_ST_NONE;
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ctx->flags = 0;
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||||
ctx->messages = conf->agent->messages;
|
||||
ctx->buffer = &buf_empty;
|
||||
ctx->filter = filter;
|
||||
ctx->state = SPOE_CTX_ST_NONE;
|
||||
ctx->status_code = SPOE_CTX_ERR_NONE;
|
||||
ctx->flags = 0;
|
||||
ctx->messages = conf->agent->messages;
|
||||
ctx->buffer = &buf_empty;
|
||||
LIST_INIT(&ctx->buffer_wait.list);
|
||||
ctx->buffer_wait.target = ctx;
|
||||
ctx->buffer_wait.wakeup_cb = (int (*)(void *))wakeup_spoe_context;
|
||||
|
|
@ -2791,6 +2826,9 @@ spoe_start_analyze(struct stream *s, struct filter *filter, struct channel *chn)
|
|||
((struct spoe_config *)FLT_CONF(filter))->agent->id,
|
||||
__FUNCTION__, s, spoe_ctx_state_str[ctx->state], ctx->flags);
|
||||
|
||||
if (ctx->state == SPOE_CTX_ST_NONE)
|
||||
goto out;
|
||||
|
||||
if (!(chn->flags & CF_ISRESP)) {
|
||||
if (filter->pre_analyzers & AN_REQ_INSPECT_FE)
|
||||
chn->analysers |= AN_REQ_INSPECT_FE;
|
||||
|
|
@ -2801,11 +2839,9 @@ spoe_start_analyze(struct stream *s, struct filter *filter, struct channel *chn)
|
|||
goto out;
|
||||
|
||||
ctx->stream_id = s->uniq_id;
|
||||
if (ctx->state != SPOE_CTX_ST_NONE && ctx->state != SPOE_CTX_ST_ERROR) {
|
||||
ret = process_spoe_event(s, ctx, SPOE_EV_ON_CLIENT_SESS);
|
||||
if (ret != 1)
|
||||
goto out;
|
||||
}
|
||||
ret = process_spoe_event(s, ctx, SPOE_EV_ON_CLIENT_SESS);
|
||||
if (!ret)
|
||||
goto out;
|
||||
ctx->flags |= SPOE_CTX_FL_CLI_CONNECTED;
|
||||
}
|
||||
else {
|
||||
|
|
@ -2815,16 +2851,13 @@ spoe_start_analyze(struct stream *s, struct filter *filter, struct channel *chn)
|
|||
if (ctx->flags & SPOE_CTX_FL_SRV_CONNECTED)
|
||||
goto out;
|
||||
|
||||
if (ctx->state != SPOE_CTX_ST_NONE && ctx->state != SPOE_CTX_ST_ERROR) {
|
||||
ret = process_spoe_event(s, ctx, SPOE_EV_ON_SERVER_SESS);
|
||||
if (ret != 1)
|
||||
goto out;
|
||||
}
|
||||
ctx->flags |= SPOE_CTX_FL_SRV_CONNECTED;
|
||||
ret = process_spoe_event(s, ctx, SPOE_EV_ON_SERVER_SESS);
|
||||
if (!ret) {
|
||||
channel_dont_read(chn);
|
||||
channel_dont_close(chn);
|
||||
goto out;
|
||||
}
|
||||
ctx->flags |= SPOE_CTX_FL_SRV_CONNECTED;
|
||||
}
|
||||
|
||||
out:
|
||||
|
|
@ -2846,7 +2879,7 @@ spoe_chn_pre_analyze(struct stream *s, struct filter *filter,
|
|||
__FUNCTION__, s, spoe_ctx_state_str[ctx->state],
|
||||
ctx->flags, an_bit);
|
||||
|
||||
if (ctx->state == SPOE_CTX_ST_NONE || ctx->state == SPOE_CTX_ST_ERROR)
|
||||
if (ctx->state == SPOE_CTX_ST_NONE)
|
||||
goto out;
|
||||
|
||||
switch (an_bit) {
|
||||
|
|
|
|||
Loading…
Reference in New Issue