[Xen-changelog] [qemu-xen stable-4.12] gluster: the glfs_io_cbk callback function pointer adds pre/post stat args

[patchbot@xxxxxxx]

commit a55e2eca4b45108c9ffa4ab6f6068cd2e8501654
Author:     Niels de Vos <ndevos@xxxxxxxxxx>
AuthorDate: Tue Mar 5 16:46:34 2019 +0100
Commit:     Anthony PERARD <anthony.perard@xxxxxxxxxx>
CommitDate: Tue Apr 2 17:29:09 2019 +0100

    gluster: the glfs_io_cbk callback function pointer adds pre/post stat args
    
    The glfs_*_async() functions do a callback once finished. This callback
    has changed its arguments, pre- and post-stat structures have been
    added. This makes it possible to improve caching, which is useful for
    Samba and NFS-Ganesha, but not so much for QEMU. Gluster 6 is the first
    release that includes these new arguments.
    
    With an additional detection in ./configure, the new arguments can
    conditionally get included in the glfs_io_cbk handler.
    
    Signed-off-by: Niels de Vos <ndevos@xxxxxxxxxx>
    Signed-off-by: Kevin Wolf <kwolf@xxxxxxxxxx>
    (cherry picked from commit 0e3b891fefacc0e49f3c8ffa3a753b69eb7214d2)
---
 block/gluster.c |  6 +++++-
 configure       | 24 ++++++++++++++++++++++++
 2 files changed, 29 insertions(+), 1 deletion(-)

diff --git a/block/gluster.c b/block/gluster.c
index dd58567e7e..e518de1b0d 100644
--- a/block/gluster.c
+++ b/block/gluster.c
@@ -729,7 +729,11 @@ static struct glfs 
*qemu_gluster_init(BlockdevOptionsGluster *gconf,
 /*
  * AIO callback routine called from GlusterFS thread.
  */
-static void gluster_finish_aiocb(struct glfs_fd *fd, ssize_t ret, void *arg)
+static void gluster_finish_aiocb(struct glfs_fd *fd, ssize_t ret,
+#ifdef CONFIG_GLUSTERFS_IOCB_HAS_STAT
+                                 struct glfs_stat *pre, struct glfs_stat *post,
+#endif
+                                 void *arg)
 {
     GlusterAIOCB *acb = (GlusterAIOCB *)arg;
 
diff --git a/configure b/configure
index b44d934645..a8b707a670 100755
--- a/configure
+++ b/configure
@@ -453,6 +453,7 @@ glusterfs_discard="no"
 glusterfs_fallocate="no"
 glusterfs_zerofill="no"
 glusterfs_ftruncate_has_stat="no"
+glusterfs_iocb_has_stat="no"
 gtk=""
 gtkabi=""
 gtk_gl="no"
@@ -4009,6 +4010,25 @@ EOF
     if compile_prog "$glusterfs_cflags" "$glusterfs_libs" ; then
       glusterfs_ftruncate_has_stat="yes"
     fi
+    cat > $TMPC << EOF
+#include <glusterfs/api/glfs.h>
+
+/* new glfs_io_cbk() passes two additional glfs_stat structs */
+static void
+glusterfs_iocb(glfs_fd_t *fd, ssize_t ret, struct glfs_stat *prestat, struct 
glfs_stat *poststat, void *data)
+{}
+
+int
+main(void)
+{
+       glfs_io_cbk iocb = &glusterfs_iocb;
+       iocb(NULL, 0 , NULL, NULL, NULL);
+       return 0;
+}
+EOF
+    if compile_prog "$glusterfs_cflags" "$glusterfs_libs" ; then
+      glusterfs_iocb_has_stat="yes"
+    fi
   else
     if test "$glusterfs" = "yes" ; then
       feature_not_found "GlusterFS backend support" \
@@ -6711,6 +6731,10 @@ if test "$glusterfs_ftruncate_has_stat" = "yes" ; then
   echo "CONFIG_GLUSTERFS_FTRUNCATE_HAS_STAT=y" >> $config_host_mak
 fi
 
+if test "$glusterfs_iocb_has_stat" = "yes" ; then
+  echo "CONFIG_GLUSTERFS_IOCB_HAS_STAT=y" >> $config_host_mak
+fi
+
 if test "$libssh2" = "yes" ; then
   echo "CONFIG_LIBSSH2=m" >> $config_host_mak
   echo "LIBSSH2_CFLAGS=$libssh2_cflags" >> $config_host_mak
--
generated by git-patchbot for /home/xen/git/qemu-xen.git#stable-4.12

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