hw/9pfs: Add st_gen support in getattr reply

This patch use file system specific ioctl for getting i_generation
value. Not all file system support the ioctl. So we add an export
specific extended operation and assign right callback for the
file system that support i_generation ioctl

["M. Mohan Kumar" <mohan@in.ibm.com> we can do ioctl only for
regular files and directories on the server]

Signed-off-by: Harsh Prateek Bora <harsh@linux.vnet.ibm.com>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>

1 files changed, 17 insertions, 0 deletions

diff --git a/configure b/configure
index f8f7a072b7..4f87e0a43b 100755
--- a/configure
+++ b/configure
@@ -2568,6 +2568,19 @@ if compile_prog "" "" ; then
     open_by_handle_at=yes
 fi
 
+########################################
+# check if we have linux/magic.h
+
+linux_magic_h=no
+cat > $TMPC << EOF
+#include <linux/magic.h>
+int main(void) {
+}
+EOF
+if compile_prog "" "" ; then
+    linux_magic_h=yes
+fi
+
 ##########################################
 # End of CC checks
 # After here, no more $cc or $ld runs
@@ -3051,6 +3064,10 @@ if test "$open_by_handle_at" = "yes" ; then
   echo "CONFIG_OPEN_BY_HANDLE=y" >> $config_host_mak
 fi
 
+if test "$linux_magic_h" = "yes" ; then
+  echo "CONFIG_LINUX_MAGIC_H=y" >> $config_host_mak
+fi
+
 # USB host support
 case "$usb" in
 linux)