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GCF-837 Check wsrep interface version before loading provider

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This commit is contained in:
Daniele Sciascia 2016-06-13 17:49:42 +02:00 • committed by Nirbhay Choubey
parent dfa9012abb
commit bf19492e3b
1 changed files with 31 additions and 6 deletions

37
wsrep/wsrep_loader.c
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@ -37,6 +37,22 @@ static wsrep_log_cb_t logger = default_logger;
* Library loader
**************************************************************************/
static int wsrep_check_iface_version(const char* found, const char* iface_ver)
{
const size_t msg_len = 128;
char msg[128];
if (strcmp(found, iface_ver)) {
snprintf (msg, msg_len,
"provider interface version mismatch: need '%s', found '%s'",
iface_ver, found);
logger (WSREP_LOG_ERROR, msg);
return EINVAL;
}
return 0;
}
static int verify(const wsrep_t *wh, const char *iface_ver)
{
char msg[128];
@ -50,13 +66,8 @@ static int verify(const wsrep_t *wh, const char *iface_ver)
VERIFY(wh);
VERIFY(wh->version);
if (strcmp(wh->version, iface_ver)) {
snprintf (msg, sizeof(msg),
"provider interface version mismatch: need '%s', found '%s'",
iface_ver, wh->version);
logger (WSREP_LOG_ERROR, msg);
if (wsrep_check_iface_version(wh->version, iface_ver))
return EINVAL;
}
VERIFY(wh->init);
VERIFY(wh->options_set);
@ -107,6 +118,15 @@ static wsrep_loader_fun wsrep_dlf(void *dlh, const char *sym)
return alias.dlfun;
}
static int wsrep_check_version_symbol(void *dlh)
{
char** dlversion = NULL;
dlversion = (char**) dlsym(dlh, "wsrep_interface_version");
if (dlversion == NULL)
return 0;
return wsrep_check_iface_version(*dlversion, WSREP_INTERFACE_VERSION);
}
extern int wsrep_dummy_loader(wsrep_t *w);
int wsrep_load(const char *spec, wsrep_t **hptr, wsrep_log_cb_t log_cb)
@ -151,6 +171,11 @@ int wsrep_load(const char *spec, wsrep_t **hptr, wsrep_log_cb_t log_cb)
goto out;
}
if (wsrep_check_version_symbol(dlh) != 0) {
ret = EINVAL;
goto out;
}
if ((ret = (*dlfun)(*hptr)) != 0) {
snprintf(msg, sizeof(msg), "wsrep_load(): loader failed: %s",
strerror(ret));