copy: use btrfs reflinking only whe we know we copy full files

[elogind.git] / src / core / busname.c

diff --git a/src/core/busname.c b/src/core/busname.c
index 6a0aef8d1fbce6f2ae588e16eca7954aa89ff13e..d4aa463397ea58de428fc4623d1646e2df8e9bc2 100644 (file)
--- a/src/core/busname.c
+++ b/src/core/busname.c
@@ -303,10 +303,8 @@ static int busname_open_fd(BusName *n) {
 
         mode = UNIT(n)->manager->running_as == SYSTEMD_SYSTEM ? "system" : "user";
         n->starter_fd = bus_kernel_open_bus_fd(mode, &path);
-        if (n->starter_fd < 0) {
-                log_unit_warning(UNIT(n)->id, "Failed to open %s: %s", path ?: "kdbus", strerror(-n->starter_fd));
-                return n->starter_fd;
-        }
+        if (n->starter_fd < 0)
+                return log_unit_warning_errno(UNIT(n)->id, n->starter_fd, "Failed to open %s: %m", path ?: "kdbus");
 
         return 0;
 }
@@ -729,6 +727,7 @@ _pure_ static const char *busname_sub_state_to_string(Unit *u) {
 
 static int busname_peek_message(BusName *n) {
         struct kdbus_cmd_recv cmd_recv = {
+                .size = sizeof(cmd_recv),
                 .flags = KDBUS_RECV_PEEK,
         };
         struct kdbus_cmd_free cmd_free = {};
@@ -752,7 +751,7 @@ static int busname_peek_message(BusName *n) {
         if (log_get_max_level() < LOG_DEBUG)
                 return 0;
 
-        r = ioctl(n->starter_fd, KDBUS_CMD_MSG_RECV, &cmd_recv);
+        r = ioctl(n->starter_fd, KDBUS_CMD_RECV, &cmd_recv);
         if (r < 0) {
                 if (errno == EINTR || errno == EAGAIN)
                         return 0;
@@ -768,9 +767,9 @@ static int busname_peek_message(BusName *n) {
          * longer than necessary. */
 
         ps = page_size();
-        start = (cmd_recv.offset / ps) * ps;
-        delta = cmd_recv.offset - start;
-        sz = PAGE_ALIGN(delta + cmd_recv.msg_size);
+        start = (cmd_recv.reply.offset / ps) * ps;
+        delta = cmd_recv.reply.offset - start;
+        sz = PAGE_ALIGN(delta + cmd_recv.reply.msg_size);
 
         p = mmap(NULL, sz, PROT_READ, MAP_SHARED, n->starter_fd, start);
         if (p == MAP_FAILED) {
@@ -802,7 +801,7 @@ finish:
         if (p)
                 (void) munmap(p, sz);
 
-        cmd_free.offset = cmd_recv.offset;
+        cmd_free.offset = cmd_recv.reply.offset;
         if (ioctl(n->starter_fd, KDBUS_CMD_FREE, &cmd_free) < 0)
                 log_unit_warning(UNIT(n)->id, "Failed to free peeked message, ignoring: %m");