diff options
Diffstat (limited to 'gnu/packages/patches/ucx-tcp-iface-ioctl.patch')
| -rw-r--r-- | gnu/packages/patches/ucx-tcp-iface-ioctl.patch | 109 |
1 files changed, 109 insertions, 0 deletions
diff --git a/gnu/packages/patches/ucx-tcp-iface-ioctl.patch b/gnu/packages/patches/ucx-tcp-iface-ioctl.patch new file mode 100644 index 0000000000..d5df7047bc --- /dev/null +++ b/gnu/packages/patches/ucx-tcp-iface-ioctl.patch @@ -0,0 +1,109 @@ +Since /sys is unavailable in build environments, the list of available +TCP network interfaces cannot be obtained via /sys/class/net. This patch +provides alternative code that uses the SIOCGIFCONF ioctl to get the +names of the available TCP network interfaces. + +diff --git a/src/uct/tcp/tcp_iface.c b/src/uct/tcp/tcp_iface.c +index 81ad459..10024a6 100644 +--- a/src/uct/tcp/tcp_iface.c ++++ b/src/uct/tcp/tcp_iface.c +@@ -12,6 +12,8 @@ + #include <sys/poll.h> + #include <netinet/tcp.h> + #include <dirent.h> ++#include <net/if.h> ++#include <sys/ioctl.h> + + static ucs_config_field_t uct_tcp_iface_config_table[] = { + {"", "MAX_SHORT=8k", NULL, +@@ -483,6 +485,70 @@ static UCS_CLASS_DEFINE_NEW_FUNC(uct_tcp_iface_t, uct_iface_t, uct_md_h, + uct_worker_h, const uct_iface_params_t*, + const uct_iface_config_t*); + ++/* Fetch information about available network devices through an ioctl. */ ++static ucs_status_t query_devices_ioctl(uct_md_h md, ++ uct_tl_resource_desc_t **resource_p, ++ unsigned *num_resources_p) ++{ ++ int sock, err, i; ++ uct_tl_resource_desc_t *resources, *tmp; ++ unsigned num_resources; ++ ucs_status_t status; ++ struct ifconf conf; ++ struct ifreq reqs[10]; ++ ++ conf.ifc_len = sizeof reqs; ++ conf.ifc_req = reqs; ++ ++ sock = socket(SOCK_STREAM, AF_INET, 0); ++ if (sock < 0) { ++ ucs_error("socket(2) failed: %m"); ++ status = UCS_ERR_IO_ERROR; ++ goto out; ++ } ++ ++ err = ioctl(sock, SIOCGIFCONF, &conf); ++ if (err < 0) { ++ ucs_error("SIOCGIFCONF ioctl failed: %m"); ++ status = UCS_ERR_IO_ERROR; ++ goto out; ++ } ++ ++ resources = NULL; ++ num_resources = 0; ++ for (i = 0; i < conf.ifc_len / sizeof(struct ifreq); i++) { ++ const char *name = reqs[i].ifr_name; ++ ++ if (!ucs_netif_is_active(name)) { ++ continue; ++ } ++ ++ tmp = ucs_realloc(resources, sizeof(*resources) * (num_resources + 1), ++ "tcp resources"); ++ if (tmp == NULL) { ++ ucs_free(resources); ++ status = UCS_ERR_NO_MEMORY; ++ goto out; ++ } ++ resources = tmp; ++ ++ ucs_snprintf_zero(resources[i].tl_name, sizeof(resources[i].tl_name), ++ "%s", UCT_TCP_NAME); ++ ucs_snprintf_zero(resources[i].dev_name, sizeof(resources[i].dev_name), ++ "%s", name); ++ resources[i].dev_type = UCT_DEVICE_TYPE_NET; ++ ++num_resources; ++ } ++ ++ *num_resources_p = num_resources; ++ *resource_p = resources; ++ status = UCS_OK; ++ ++out: ++ if (sock >= 0) close(sock); ++ return status; ++} ++ + static ucs_status_t uct_tcp_query_tl_resources(uct_md_h md, + uct_tl_resource_desc_t **resource_p, + unsigned *num_resources_p) +@@ -496,9 +562,9 @@ static ucs_status_t uct_tcp_query_tl_resources(uct_md_h md, + + dir = opendir(netdev_dir); + if (dir == NULL) { +- ucs_error("opendir(%s) failed: %m", netdev_dir); +- status = UCS_ERR_IO_ERROR; +- goto out; ++ /* When /sys is unavailable, as can be the case in a container, ++ * resort to a good old 'ioctl'. */ ++ return query_devices_ioctl(md, resource_p, num_resources_p); + } + + resources = NULL; +@@ -543,6 +609,5 @@ static ucs_status_t uct_tcp_query_tl_resources(uct_md_h md, + + out_closedir: + closedir(dir); +-out: + return status; + } |