X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;ds=sidebyside;f=src%2Flibsystemd%2Fsd-rtnl%2Fsd-rtnl.c;h=b91d08012ad78aaf52a621fcf59691be876e2a7c;hb=e80af1bdddbc7a51191e29b0c841e8dcafe7b1cc;hp=8650f550f7d1f6bcb40b3e34d51894501c73488e;hpb=4e996881b2a24390b534d84aa89ba70401cc7e69;p=elogind.git

diff --git a/src/libsystemd/sd-rtnl/sd-rtnl.c b/src/libsystemd/sd-rtnl/sd-rtnl.c
index 8650f550f..b91d08012 100644
--- a/src/libsystemd/sd-rtnl/sd-rtnl.c
+++ b/src/libsystemd/sd-rtnl/sd-rtnl.c
@@ -22,6 +22,7 @@
 #include <sys/socket.h>
 #include <poll.h>
 
+#include "missing.h"
 #include "macro.h"
 #include "util.h"
 #include "hashmap.h"
@@ -75,8 +76,27 @@ static bool rtnl_pid_changed(sd_rtnl *rtnl) {
         return rtnl->original_pid != getpid();
 }
 
-int sd_rtnl_open(sd_rtnl **ret, uint32_t groups) {
+static int rtnl_compute_groups_ap(uint32_t *_groups, unsigned n_groups, va_list ap) {
+        uint32_t groups = 0;
+        unsigned i;
+
+        for (i = 0; i < n_groups; i++) {
+                unsigned group;
+
+                group = va_arg(ap, unsigned);
+                assert_return(group < 32, -EINVAL);
+
+                groups |= group ? (1 << (group - 1)) : 0;
+        }
+
+        *_groups = groups;
+
+        return 0;
+}
+
+int sd_rtnl_open(sd_rtnl **ret, unsigned n_groups, ...) {
         _cleanup_rtnl_unref_ sd_rtnl *rtnl = NULL;
+        va_list ap;
         socklen_t addrlen;
         int r, one = 1;
 
@@ -90,10 +110,19 @@ int sd_rtnl_open(sd_rtnl **ret, uint32_t groups) {
         if (rtnl->fd < 0)
                 return -errno;
 
-        if (setsockopt(rtnl->fd, SOL_SOCKET, SO_PASSCRED, &one, sizeof(one)) < 0)
+        r = setsockopt(rtnl->fd, SOL_SOCKET, SO_PASSCRED, &one, sizeof(one));
+        if (r < 0)
                 return -errno;
 
-        rtnl->sockaddr.nl.nl_groups = groups;
+        r = setsockopt(rtnl->fd, SOL_NETLINK, NETLINK_PKTINFO, &one, sizeof(one));
+        if (r < 0)
+                return -errno;
+
+        va_start(ap, n_groups);
+        r = rtnl_compute_groups_ap(&rtnl->sockaddr.nl.nl_groups, n_groups, ap);
+        va_end(ap);
+        if (r < 0)
+                return r;
 
         addrlen = sizeof(rtnl->sockaddr);
 
@@ -203,8 +232,10 @@ int sd_rtnl_send(sd_rtnl *nl,
                 }
         } else {
                 /* append to queue */
-                if (nl->wqueue_size >= RTNL_WQUEUE_MAX)
+                if (nl->wqueue_size >= RTNL_WQUEUE_MAX) {
+                        log_debug("rtnl: exhausted the write queue size (%d)", RTNL_WQUEUE_MAX);
                         return -ENOBUFS;
+                }
 
                 if (!GREEDY_REALLOC(nl->wqueue, nl->wqueue_allocated, nl->wqueue_size + 1))
                         return -ENOMEM;
@@ -221,8 +252,10 @@ int sd_rtnl_send(sd_rtnl *nl,
 int rtnl_rqueue_make_room(sd_rtnl *rtnl) {
         assert(rtnl);
 
-        if (rtnl->rqueue_size >= RTNL_RQUEUE_MAX)
+        if (rtnl->rqueue_size >= RTNL_RQUEUE_MAX) {
+                log_debug("rtnl: exhausted the read queue size (%d)", RTNL_RQUEUE_MAX);
                 return -ENOBUFS;
+        }
 
         if (!GREEDY_REALLOC(rtnl->rqueue, rtnl->rqueue_allocated, rtnl->rqueue_size + 1))
                 return -ENOMEM;
@@ -233,8 +266,10 @@ int rtnl_rqueue_make_room(sd_rtnl *rtnl) {
 int rtnl_rqueue_partial_make_room(sd_rtnl *rtnl) {
         assert(rtnl);
 
-        if (rtnl->rqueue_partial_size >= RTNL_RQUEUE_MAX)
+        if (rtnl->rqueue_partial_size >= RTNL_RQUEUE_MAX) {
+                log_debug("rtnl: exhausted the partial read queue size (%d)", RTNL_RQUEUE_MAX);
                 return -ENOBUFS;
+        }
 
         if (!GREEDY_REALLOC(rtnl->rqueue_partial, rtnl->rqueue_partial_allocated,
                             rtnl->rqueue_partial_size + 1))