These patches add the reconnect support in vduse, The steps
is map the pages from kernel to userspace, userspace    
app will sync the reconnection status and vq_info in the pages
Also, add the new IOCTL VDUSE_GET_RECONNECT_INFO
userspace app will use this information to mmap the memory

Will send the patch for DPDK later

Tested in vduse + dpdk test-pmd
 
Signed-off-by: Cindy Lu <lulu@redhat.com>

Cindy Lu (4):
  vduse: Add function to get/free the pages for reconnection
  vduse: Add file operation for mmap
  vduse: update the vq_info in ioctl
  vduse: Add new ioctl VDUSE_GET_RECONNECT_INFO

 drivers/vdpa/vdpa_user/vduse_dev.c | 177 +++++++++++++++++++++++++++++
 include/uapi/linux/vduse.h         |  21 ++++
 2 files changed, 198 insertions(+)

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2.34.3