libs/gnttab: add missing FreeBSD functions

The FreeBSD implementation is missing the following functions:

osdep_gnttab_dmabuf_exp_from_refs
osdep_gnttab_dmabuf_exp_wait_released
osdep_gnttab_dmabuf_imp_to_refs
osdep_gnttab_dmabuf_imp_release

Which all deal with dmabufs, that only exists on Linux. Implement them
using abort, since such functions should never be called on FreeBSD.

FTR, I realized those functions where missing when attempting to use
pygrub:

Traceback (most recent call last):
  File "/usr/local/lib/xen/bin/pygrub", line 19, in <module>
    import xen.lowlevel.xc
ImportError: /usr/local/lib/libxengnttab.so.1: Undefined symbol "osdep_gnttab_dmabuf_exp_from_refs"

Fixes: ee8105 ("libgnttab: Add support for Linux dma-buf")
Signed-off-by: Roger Pau Monné <roger.pau@citrix.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>
Release-acked-by: Juergen Gross <jgross@suse.com>
Reviewed-by: Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com>

diff --git a/tools/libs/gnttab/freebsd.c b/tools/libs/gnttab/freebsd.c
index 5c12fe9b0ba6625bd628689a4e62006768910842..886b588303a0983d6a0f6346c37484d1bb178665 100644 (file)
--- a/tools/libs/gnttab/freebsd.c
+++ b/tools/libs/gnttab/freebsd.c
@@ -307,6 +307,35 @@ int osdep_gntshr_unshare(xengntshr_handle *xgs,
     return munmap(start_address, count * PAGE_SIZE);
 }
 
+/*
+ * The functions below are Linux-isms that will likely never be implemented
+ * on FreeBSD unless FreeBSD also implements something akin to Linux dmabuf.
+ */
+int osdep_gnttab_dmabuf_exp_from_refs(xengnttab_handle *xgt, uint32_t domid,
+                                      uint32_t flags, uint32_t count,
+                                      const uint32_t *refs,
+                                      uint32_t *dmabuf_fd)
+{
+    abort();
+}
+
+int osdep_gnttab_dmabuf_exp_wait_released(xengnttab_handle *xgt,
+                                          uint32_t fd, uint32_t wait_to_ms)
+{
+    abort();
+}
+
+int osdep_gnttab_dmabuf_imp_to_refs(xengnttab_handle *xgt, uint32_t domid,
+                                    uint32_t fd, uint32_t count, uint32_t *refs)
+{
+    abort();
+}
+
+int osdep_gnttab_dmabuf_imp_release(xengnttab_handle *xgt, uint32_t fd)
+{
+    abort();
+}
+
 /*
  * Local variables:
  * mode: C