TL/MLX5/MCAST: adding ip over ib mcast helper functions as well as some of the environment variables

src/components/tl/mlx5/Makefile.am

@@ -23,6 +23,7 @@ mcast =                                 \
 	mcast/p2p/ucc_tl_mlx5_mcast_p2p.c   \
 	mcast/tl_mlx5_mcast_progress.h      \
 	mcast/tl_mlx5_mcast_helper.h        \
+	mcast/tl_mlx5_mcast_helper.c        \
 	mcast/tl_mlx5_mcast_team.c
 
 sources =             \

src/components/tl/mlx5/mcast/tl_mlx5_mcast_helper.c

@@ -0,0 +1,191 @@
+/**
+ * Copyright (c) 2022-2023, NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+ *
+ * See file LICENSE for terms.
+ */
+
+#include "tl_mlx5_mcast_helper.h"
+#include <glob.h>
+#include <net/if.h>
+#include <ifaddrs.h>
+
+#define PREF        "/sys/class/net/"
+#define SUFF        "/device/resource"
+#define MAX_STR_LEN 128
+
+static ucc_status_t ucc_tl_mlx5_get_ipoib_ip(char *ifname, struct sockaddr_storage *addr)
+{
+    ucc_status_t    status  = UCC_ERR_NO_RESOURCE;
+    struct ifaddrs *ifaddr  = NULL;
+    struct ifaddrs *ifa     = NULL;
+    int             is_ipv4 = 0;
+    int             family;
+    int             n;
+    int             is_up;
+
+    if (getifaddrs(&ifaddr) == -1) {
+        return UCC_ERR_NO_RESOURCE;
+    }
+
+    for (ifa = ifaddr, n = 0; ifa != NULL; ifa=ifa->ifa_next, n++) {
+        if (ifa->ifa_addr == NULL) {
+            continue;
+        }
+
+        family = ifa->ifa_addr->sa_family;
+        if (family != AF_INET && family != AF_INET6) {
+            continue;
+        }
+
+        is_up   = (ifa->ifa_flags & IFF_UP) == IFF_UP;
+        is_ipv4 = (family == AF_INET) ? 1 : 0;
+
+        if (is_up && !strncmp(ifa->ifa_name, ifname, strlen(ifname)) ) {
+            if (is_ipv4) {
+                memcpy((struct sockaddr_in *) addr,
+                       (struct sockaddr_in *) ifa->ifa_addr,
+                       sizeof(struct sockaddr_in));
+            } else {
+                memcpy((struct sockaddr_in6 *) addr,
+                       (struct sockaddr_in6 *) ifa->ifa_addr,
+                       sizeof(struct sockaddr_in6));
+            }
+
+            status = UCC_OK;
+            break;
+        }
+    }
+
+    freeifaddrs(ifaddr);
+    return status;
+}
+
+static int cmp_files(char *f1, char *f2)
+{
+    int   answer = 0;
+    FILE *fp1;
+    FILE *fp2;
+    int   ch1;
+    int   ch2;
+
+    if ((fp1 = fopen(f1, "r")) == NULL) {
+        goto out;
+    } else if ((fp2 = fopen(f2, "r")) == NULL) {
+        goto close;
+    }
+
+    do {
+        ch1 = getc(fp1);
+        ch2 = getc(fp2);
+    } while((ch1 != EOF) && (ch2 != EOF) && (ch1 == ch2));
+
+
+    if (ch1 == ch2) {
+        answer = 1;
+    }
+
+    if (fclose(fp2) != 0) {
+        return 0;
+    }
+close:
+    if (fclose(fp1) != 0) {
+        return 0;
+    }
+out:
+    return answer;
+}
+
+static int port_from_file(char *port_file)
+{
+    int   res = -1;
+    char  buf1[MAX_STR_LEN];
+    char  buf2[MAX_STR_LEN];
+    FILE *fp;
+    int   len;
+
+    if ((fp = fopen(port_file, "r")) == NULL) {
+        return -1;
+    }
+
+    if (fgets(buf1, MAX_STR_LEN - 1, fp) == NULL) {
+        goto out;
+    }
+
+    len       = strlen(buf1) - 2;
+    strncpy(buf2, buf1 + 2, len);
+    buf2[len] = 0;
+    res       = atoi(buf2);
+
+out:
+    if (fclose(fp) != 0) {
+        return -1;
+    }
+    return res;
+}
+
+static ucc_status_t dev2if(char *dev_name, char *port, struct sockaddr_storage
+                           *rdma_src_addr)
+{
+    ucc_status_t status  = UCC_OK;
+    glob_t       glob_el = {0,};
+    char         dev_file [MAX_STR_LEN];
+    char         port_file[MAX_STR_LEN];
+    char         net_file [MAX_STR_LEN];
+    char         if_name  [MAX_STR_LEN];
+    char         glob_path[MAX_STR_LEN];
+    int          i;
+    char       **p;
+    int          len;
+
+    sprintf(glob_path, PREF"*");
+
+    sprintf(dev_file, "/sys/class/infiniband/%s"SUFF, dev_name);
+    if (glob(glob_path, 0, 0, &glob_el)) {
+        return UCC_ERR_NO_RESOURCE;
+    }
+    p = glob_el.gl_pathv;
+
+    if (glob_el.gl_pathc >= 1) {
+        for (i = 0; i < glob_el.gl_pathc; i++, p++) {
+            sprintf(port_file, "%s/dev_id", *p);
+            sprintf(net_file,  "%s"SUFF,    *p);
+            if(cmp_files(net_file, dev_file) && port != NULL &&
+               port_from_file(port_file) == atoi(port) - 1) {
+                len = strlen(net_file) - strlen(PREF) - strlen(SUFF);
+                strncpy(if_name, net_file + strlen(PREF), len);
+                if_name[len] = 0;
+
+                status = ucc_tl_mlx5_get_ipoib_ip(if_name, rdma_src_addr);
+                if (UCC_OK == status) {
+                    break;
+                }
+            }
+        }
+    }
+
+    globfree(&glob_el);
+    return status;
+}
+
+ucc_status_t ucc_tl_mlx5_probe_ip_over_ib(char* ib_dev, struct
+                                          sockaddr_storage *addr)
+{
+    char                   *ib_name = NULL;
+    char                   *port    = NULL;
+    ucc_status_t            status;
+    struct sockaddr_storage rdma_src_addr;
+
+    if (NULL == ib_dev) {
+        status = UCC_ERR_NO_RESOURCE;
+    } else {
+        ucc_string_split(ib_dev, ":", 2, &ib_name, &port);
+        status = dev2if(ib_name, port, &rdma_src_addr);
+    }
+
+    if (UCC_OK == status) {
+        *addr = rdma_src_addr;
+    }
+
+    return status;
+}
+

src/components/tl/mlx5/mcast/tl_mlx5_mcast_helper.h

@@ -352,14 +352,17 @@ static inline ucc_status_t ucc_tl_mlx5_mcast_reliable(ucc_tl_mlx5_mcast_coll_com
     return UCC_INPROGRESS;
 }
 
-ucc_status_t ucc_tl_setup_mcast(ucc_tl_mlx5_mcast_coll_comm_t *comm);
+ucc_status_t ucc_tl_mlx5_probe_ip_over_ib(char* ib_dev_list,
+                                          struct sockaddr_storage *addr);
+
+ucc_status_t ucc_tl_mlx5_setup_mcast(ucc_tl_mlx5_mcast_coll_comm_t *comm);
 
 ucc_status_t ucc_tl_mlx5_mcast_init_qps(ucc_tl_mlx5_mcast_coll_context_t *ctx,
                                         ucc_tl_mlx5_mcast_coll_comm_t *comm);
 
 ucc_status_t ucc_tl_mlx5_mcast_setup_qps(ucc_tl_mlx5_mcast_coll_context_t *ctx,
                                          ucc_tl_mlx5_mcast_coll_comm_t *comm);
 
-ucc_status_t ucc_tl_clean_mcast_comm(ucc_tl_mlx5_mcast_coll_comm_t *comm);
+ucc_status_t ucc_tl_mlx5_clean_mcast_comm(ucc_tl_mlx5_mcast_coll_comm_t *comm);
 
 #endif /* TL_MLX5_MCAST_HELPER_H_ */

src/components/tl/mlx5/tl_mlx5.c

@@ -67,6 +67,27 @@ static ucc_config_field_t ucc_tl_mlx5_lib_config_table[] = {
      ucc_offsetof(ucc_tl_mlx5_lib_config_t, qp_conf.qp_max_atomic),
      UCC_CONFIG_TYPE_UINT},
 
+    {"MCAST_SX_DEPTH", "512", "Send context depth of the Mcast comm",
+     ucc_offsetof(ucc_tl_mlx5_lib_config_t, mcast_conf.sx_depth),
+     UCC_CONFIG_TYPE_INT},
+
+    {"MCAST_SX_INLINE", "128", "Minimal size for inline data send in Mcast",
+     ucc_offsetof(ucc_tl_mlx5_lib_config_t, mcast_conf.sx_inline),
+     UCC_CONFIG_TYPE_MEMUNITS},
+
+    {"MCAST_RX_DEPTH", "4096", "Recv context depth of the Mcast comm",
+     ucc_offsetof(ucc_tl_mlx5_lib_config_t, mcast_conf.rx_depth),
+     UCC_CONFIG_TYPE_INT},
+
+    {"MCAST_POST_RECV_THRESH", "64",
+        "Threshold for posting recv into rx ctx of the Mcast comm",
+     ucc_offsetof(ucc_tl_mlx5_lib_config_t, mcast_conf.post_recv_thresh),
+     UCC_CONFIG_TYPE_INT},
+
+    {"MCAST_WINDOW_SIZE", "64", "Reliability Mcast window size",
+     ucc_offsetof(ucc_tl_mlx5_lib_config_t, mcast_conf.wsize),
+     UCC_CONFIG_TYPE_INT},
+
     {NULL}};
 
 static ucc_config_field_t ucc_tl_mlx5_context_config_table[] = {
@@ -77,6 +98,14 @@ static ucc_config_field_t ucc_tl_mlx5_context_config_table[] = {
      ucc_offsetof(ucc_tl_mlx5_context_config_t, devices),
      UCC_CONFIG_TYPE_STRING_ARRAY},
 
+    {"MCAST_TIMEOUT", "10000", "Timeout [usec] for the reliability NACK in Mcast",
+     ucc_offsetof(ucc_tl_mlx5_context_config_t, mcast_ctx_conf.timeout),
+     UCC_CONFIG_TYPE_INT},
+
+    {"MCAST_NET_DEVICE", "", "Specifies which network device to use for Mcast",
+     ucc_offsetof(ucc_tl_mlx5_context_config_t, mcast_ctx_conf.ib_dev_name),
+     UCC_CONFIG_TYPE_STRING},
+
     {NULL}};
 
 UCC_CLASS_DEFINE_NEW_FUNC(ucc_tl_mlx5_lib_t, ucc_base_lib_t,

src/utils/ucc_compiler_def.h

@@ -26,6 +26,7 @@
 #define ucc_snprintf_safe snprintf
 #define ucc_likely        ucs_likely
 #define ucc_unlikely      ucs_unlikely
+#define ucc_string_split  ucs_string_split
 
 /**
  * Prevent compiler from reordering instructions