CLEANUP: lua: Remove consistency check for sample fetches and actions
It is not possible anymore to alter the HTTP parser state from lua sample
fetches or lua actions. So there is no reason to still check for the parser
state consistency.
diff --git a/include/types/hlua.h b/include/types/hlua.h
index 6febee2..70627f4 100644
--- a/include/types/hlua.h
+++ b/include/types/hlua.h
@@ -60,22 +60,6 @@
HLUA_E_ERR, /* LUA stack execution failed without error message. */
};
-/* This struct is use for storing HAProxy parsers state
- * before executing some Lua code. The goal is we can
- * check and compare the parser state a the end of Lua
- * execution. If the state is changed by Lua towards
- * an unexpected state, we can abort the transaction.
- */
-struct hlua_consistency {
- enum pr_mode mode;
- union {
- struct {
- int dir;
- enum h1_state state;
- } http;
- } data;
-};
-
struct hlua {
lua_State *T; /* The LUA stack. */
int Tref; /* The reference of the stack in coroutine case.
@@ -92,7 +76,6 @@
We must wake this task to continue the task execution */
struct list com; /* The list head of the signals attached to this task. */
struct ebpt_node node;
- struct hlua_consistency cons; /* Store data consistency check. */
int gc_count; /* number of items which need a GC */
};
diff --git a/src/hlua.c b/src/hlua.c
index f1a234a..f8de0d8 100644
--- a/src/hlua.c
+++ b/src/hlua.c
@@ -2662,53 +2662,6 @@
*
*/
-/* This function is called before the Lua execution. It stores
- * the differents parsers state before executing some Lua code.
- */
-static inline void consistency_set(struct stream *stream, int opt, struct hlua_consistency *c)
-{
- c->mode = stream->be->mode;
- switch (c->mode) {
- case PR_MODE_HTTP:
- c->data.http.dir = opt & SMP_OPT_DIR;
- if (c->data.http.dir == SMP_OPT_DIR_REQ)
- c->data.http.state = stream->txn->req.msg_state;
- else
- c->data.http.state = stream->txn->rsp.msg_state;
- break;
- default:
- break;
- }
-}
-
-/* This function is called after the Lua execution. it
- * returns true if the parser state is consistent, otherwise,
- * it return false.
- *
- * In HTTP mode, the parser state must be in the same state
- * or greater when we exit the function. Even if we do a
- * control yield. This prevent to break the HTTP message
- * from the Lua code.
- */
-static inline int consistency_check(struct stream *stream, int opt, struct hlua_consistency *c)
-{
- if (c->mode != stream->be->mode)
- return 0;
-
- switch (c->mode) {
- case PR_MODE_HTTP:
- if (c->data.http.dir != (opt & SMP_OPT_DIR))
- return 0;
- if (c->data.http.dir == SMP_OPT_DIR_REQ)
- return stream->txn->req.msg_state >= c->data.http.state;
- else
- return stream->txn->rsp.msg_state >= c->data.http.state;
- default:
- return 1;
- }
- return 1;
-}
-
/* Returns the struct hlua_channel join to the class channel in the
* stack entry "ud" or throws an argument error.
*/
@@ -5858,7 +5811,6 @@
struct hlua_function *fcn = private;
struct stream *stream = smp->strm;
const char *error;
- const struct buffer msg = { };
unsigned int hflags = HLUA_TXN_NOTERM;
if (!stream)
@@ -5881,8 +5833,6 @@
}
}
- consistency_set(stream, smp->opt, &stream->hlua->cons);
-
if (stream->be->mode == PR_MODE_HTTP) {
if ((smp->opt & SMP_OPT_DIR) == SMP_OPT_DIR_REQ)
hflags |= ((stream->txn->req.msg_state < HTTP_MSG_BODY) ? 0 : HLUA_TXN_HTTP_RDY);
@@ -5944,10 +5894,6 @@
switch (hlua_ctx_resume(stream->hlua, 0)) {
/* finished. */
case HLUA_E_OK:
- if (!consistency_check(stream, smp->opt, &stream->hlua->cons)) {
- si_retnclose(&stream->si[0], &msg);
- return 0;
- }
/* If the stack is empty, the function fails. */
if (lua_gettop(stream->hlua->T) <= 0)
return 0;
@@ -5962,15 +5908,11 @@
/* yield. */
case HLUA_E_AGAIN:
- if (!consistency_check(stream, smp->opt, &stream->hlua->cons))
- si_retnclose(&stream->si[0], &msg);
SEND_ERR(smp->px, "Lua sample-fetch '%s': cannot use yielded functions.\n", fcn->name);
return 0;
/* finished with error. */
case HLUA_E_ERRMSG:
- if (!consistency_check(stream, smp->opt, &stream->hlua->cons))
- si_retnclose(&stream->si[0], &msg);
/* Display log. */
SEND_ERR(smp->px, "Lua sample-fetch '%s': %s.\n",
fcn->name, lua_tostring(stream->hlua->T, -1));
@@ -5978,26 +5920,18 @@
return 0;
case HLUA_E_ETMOUT:
- if (!consistency_check(stream, smp->opt, &stream->hlua->cons))
- si_retnclose(&stream->si[0], &msg);
SEND_ERR(smp->px, "Lua sample-fetch '%s': execution timeout.\n", fcn->name);
return 0;
case HLUA_E_NOMEM:
- if (!consistency_check(stream, smp->opt, &stream->hlua->cons))
- si_retnclose(&stream->si[0], &msg);
SEND_ERR(smp->px, "Lua sample-fetch '%s': out of memory error.\n", fcn->name);
return 0;
case HLUA_E_YIELD:
- if (!consistency_check(stream, smp->opt, &stream->hlua->cons))
- si_retnclose(&stream->si[0], &msg);
SEND_ERR(smp->px, "Lua sample-fetch '%s': yield not allowed.\n", fcn->name);
return 0;
case HLUA_E_ERR:
- if (!consistency_check(stream, smp->opt, &stream->hlua->cons))
- si_retnclose(&stream->si[0], &msg);
/* Display log. */
SEND_ERR(smp->px, "Lua sample-fetch '%s' returns an unknown error.\n", fcn->name);
@@ -6134,7 +6068,6 @@
unsigned int hflags = 0;
int dir;
const char *error;
- const struct buffer msg = { };
switch (rule->from) {
case ACT_F_TCP_REQ_CNT: ; dir = SMP_OPT_DIR_REQ; break;
@@ -6165,8 +6098,6 @@
}
}
- consistency_set(s, dir, &s->hlua->cons);
-
/* If it is the first run, initialize the data for the call. */
if (!HLUA_IS_RUNNING(s->hlua)) {
@@ -6224,10 +6155,6 @@
switch (hlua_ctx_resume(s->hlua, !(flags & ACT_OPT_FINAL))) {
/* finished. */
case HLUA_E_OK:
- if (!consistency_check(s, dir, &s->hlua->cons)) {
- si_retnclose(&s->si[0], &msg);
- return ACT_RET_DONE;
- }
if (s->hlua->flags & HLUA_STOP)
return ACT_RET_DONE;
return ACT_RET_CONT;
@@ -6249,17 +6176,10 @@
s->res.flags |= CF_WAKE_WRITE;
if (HLUA_IS_WAKEREQWR(s->hlua))
s->req.flags |= CF_WAKE_WRITE;
- /* We can quit the function without consistency check
- * because HAProxy is not able to manipulate data, it
- * is only allowed to call me again. */
return ACT_RET_YIELD;
/* finished with error. */
case HLUA_E_ERRMSG:
- if (!consistency_check(s, dir, &s->hlua->cons)) {
- si_retnclose(&s->si[0], &msg);
- return ACT_RET_DONE;
- }
/* Display log. */
SEND_ERR(px, "Lua function '%s': %s.\n",
rule->arg.hlua_rule->fcn.name, lua_tostring(s->hlua->T, -1));
@@ -6267,35 +6187,19 @@
return ACT_RET_CONT;
case HLUA_E_ETMOUT:
- if (!consistency_check(s, dir, &s->hlua->cons)) {
- si_retnclose(&s->si[0], &msg);
- return ACT_RET_DONE;
- }
SEND_ERR(px, "Lua function '%s': execution timeout.\n", rule->arg.hlua_rule->fcn.name);
return 0;
case HLUA_E_NOMEM:
- if (!consistency_check(s, dir, &s->hlua->cons)) {
- si_retnclose(&s->si[0], &msg);
- return ACT_RET_DONE;
- }
SEND_ERR(px, "Lua function '%s': out of memory error.\n", rule->arg.hlua_rule->fcn.name);
return 0;
case HLUA_E_YIELD:
- if (!consistency_check(s, dir, &s->hlua->cons)) {
- si_retnclose(&s->si[0], &msg);
- return ACT_RET_DONE;
- }
SEND_ERR(px, "Lua function '%s': aborting Lua processing on expired timeout.\n",
rule->arg.hlua_rule->fcn.name);
return 0;
case HLUA_E_ERR:
- if (!consistency_check(s, dir, &s->hlua->cons)) {
- si_retnclose(&s->si[0], &msg);
- return ACT_RET_DONE;
- }
/* Display log. */
SEND_ERR(px, "Lua function '%s' return an unknown error.\n",
rule->arg.hlua_rule->fcn.name);