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MEDIUM: applet: Add a .shut callback function for applets

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Applets can now define a shutdown callback function, just like the
multiplexer. It is especially usefull to get the abort reason. This will be
pretty useful to get the status code from the SPOP stream to report it at
the SPOe filter level.

The related issue is #2502.
This commit is contained in:
Christopher Faulet 2024-07-04 10:07:59 +02:00
parent 1538c4aa82
commit 33ac3dabcb
2 changed files with 27 additions and 14 deletions
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2
include/haproxy/applet-t.h
View File

@ -55,6 +55,7 @@ struct appctx;
struct proxy;
struct stconn;
struct sedesc;
struct se_abort_info;
struct session;
/* Applet descriptor */
@ -68,6 +69,7 @@ struct applet {
size_t (*rcv_buf)(struct appctx *appctx, struct buffer *buf, size_t count, unsigned int flags); /* called from the upper layer to get data */
size_t (*snd_buf)(struct appctx *appctx, struct buffer *buf, size_t count, unsigned int flags); /* Called from the upper layet to put data */
size_t (*fastfwd)(struct appctx *appctx, struct buffer *buf, size_t count, unsigned int flags); /* Callback to fast-forward data */
void (*shut)(struct appctx *appctx, unsigned int mode, struct se_abort_info *reason); /* shutdown function */
void (*release)(struct appctx *); /* callback to release resources, may be NULL */
unsigned int timeout; /* execution timeout. */
};

39
src/stconn.c
View File

@ -141,16 +141,15 @@ void sedesc_free(struct sedesc *sedesc)
*/
void se_shutdown(struct sedesc *sedesc, enum se_shut_mode mode)
{
unsigned int flags = 0;
if ((mode & (SE_SHW_SILENT|SE_SHW_NORMAL)) && !se_fl_test(sedesc, SE_FL_SHW))
flags |= (mode & SE_SHW_NORMAL) ? SE_FL_SHWN : SE_FL_SHWS;
if ((mode & (SE_SHR_RESET|SE_SHR_DRAIN)) && !se_fl_test(sedesc, SE_FL_SHR))
flags |= (mode & SE_SHR_DRAIN) ? SE_FL_SHRD : SE_FL_SHRR;
if (se_fl_test(sedesc, SE_FL_T_MUX)) {
const struct mux_ops *mux = (sedesc->conn ? sedesc->conn->mux : NULL);
unsigned int flags = 0;
if ((mode & (SE_SHW_SILENT|SE_SHW_NORMAL)) && !se_fl_test(sedesc, SE_FL_SHW))
flags |= (mode & SE_SHW_NORMAL) ? SE_FL_SHWN : SE_FL_SHWS;
if ((mode & (SE_SHR_RESET|SE_SHR_DRAIN)) && !se_fl_test(sedesc, SE_FL_SHR))
flags |= (mode & SE_SHR_DRAIN) ? SE_FL_SHRD : SE_FL_SHRR;
if (flags) {
if (mux && mux->shut) {
@ -165,20 +164,32 @@ void se_shutdown(struct sedesc *sedesc, enum se_shut_mode mode)
}
mux->shut(sedesc->sc, mode, reason);
}
se_fl_set(sedesc, flags);
}
}
else if (se_fl_test(sedesc, SE_FL_T_APPLET)) {
if ((mode & (SE_SHW_SILENT|SE_SHW_NORMAL)) && !se_fl_test(sedesc, SE_FL_SHW))
se_fl_set(sedesc, SE_FL_SHWN);
struct appctx *appctx = sedesc->se;
if ((mode & (SE_SHR_RESET|SE_SHR_DRAIN)) && !se_fl_test(sedesc, SE_FL_SHR))
se_fl_set(sedesc, SE_FL_SHRR);
if (flags) {
if (appctx->applet->shut) {
struct se_abort_info *reason = NULL;
struct xref *peer = xref_get_peer_and_lock(&sedesc->xref);
if (peer) {
struct sedesc *sdo = container_of(peer, struct sedesc, xref);
reason = &sdo->abort_info;
xref_unlock(&sedesc->xref, peer);
}
appctx->applet->shut(appctx, mode, reason);
}
se_fl_set(sedesc, flags);
}
if (se_fl_test(sedesc, SE_FL_SHR) && se_fl_test(sedesc, SE_FL_SHW))
appctx_shut(sedesc->se);
appctx_shut(appctx);
}
}