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rdma: name the deviceless init failures in the RC server

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The verbs loader and device enumeration failures returned
RC_E_INTERNAL without any stderr trace, which made a VM or
container without RDMA indistinguishable from a genuine
library problem. Print the failing step so operators can tell
the two apart at startup.
This commit is contained in:
Jihyeon Gim
2026-09-05 19:50:29 +09:00
parent d782e622fc
commit 06a34632ea
1 changed files with 8 additions and 2 deletions
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cuwrapper/rc/rc_server_abi.cpp
+8 -2
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@@ -300,7 +300,10 @@ void rc_server_set_log_sink(rc_server *srv, rc_log_fn fn, void *ctx) {
int rc_server_init(const rc_device_opts *opts, rc_server **out) {
if (!opts || !out) return RC_E_ARG;
if (!hipObj::ibv.ensureLoaded()) return RC_E_INTERNAL;
if (!hipObj::ibv.ensureLoaded()) {
fprintf(stderr, "rc: cannot load libibverbs (dlopen/dlsym failed)\n");
return RC_E_INTERNAL;
}
std::unique_ptr<rc_server> srv(new rc_server());
srv->opts = *opts;
/* ibv port numbers are 1-based; treat an unset (0) port as 1 so
@@ -316,7 +319,10 @@ int rc_server_init(const rc_device_opts *opts, rc_server **out) {
int n = 0;
struct ibv_device **devs = hipObj::ibv.get_device_list(&n);
if (!devs || n == 0) return RC_E_INTERNAL;
if (!devs || n == 0) {
fprintf(stderr, "rc: no RDMA devices found (ibv_get_device_list)\n");
return RC_E_INTERNAL;
}
struct ibv_device *chosen = devs[0];
/* GID hint: pick the first device/port whose GID starts with it.
* Query with srv->opts.port, which the normalization above has