Index: pve-qemu-kvm-10.1.2/block/meson.build
===================================================================
--- pve-qemu-kvm-10.1.2.orig/block/meson.build
+++ pve-qemu-kvm-10.1.2/block/meson.build
@@ -126,6 +126,7 @@ foreach m : [
   [libnfs, 'nfs', files('nfs.c')],
   [libssh, 'ssh', files('ssh.c')],
   [rbd, 'rbd', files('rbd.c')],
+  [vitastor, 'vitastor', files('vitastor.c')],
 ]
   if m[0].found()
     module_ss = ss.source_set()
Index: pve-qemu-kvm-10.1.2/meson.build
===================================================================
--- pve-qemu-kvm-10.1.2.orig/meson.build
+++ pve-qemu-kvm-10.1.2/meson.build
@@ -1653,6 +1653,26 @@ if not get_option('rbd').auto() or have_
   endif
 endif
 
+vitastor = not_found
+if not get_option('vitastor').auto() or have_block
+  libvitastor_client = cc.find_library('vitastor_client', has_headers: ['vitastor_c.h'],
+    required: get_option('vitastor'))
+  if libvitastor_client.found()
+    if cc.links('''
+      #include <vitastor_c.h>
+      int main(void) {
+        vitastor_c_create_qemu(0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0);
+        return 0;
+      }''', dependencies: libvitastor_client)
+      vitastor = declare_dependency(dependencies: libvitastor_client)
+    elif get_option('vitastor').enabled()
+      error('could not link libvitastor_client')
+    else
+      warning('could not link libvitastor_client, disabling')
+    endif
+  endif
+endif
+
 glusterfs = not_found
 glusterfs_ftruncate_has_stat = false
 glusterfs_iocb_has_stat = false
@@ -2552,6 +2572,7 @@ endif
 config_host_data.set('CONFIG_OPENGL', opengl.found())
 config_host_data.set('CONFIG_PLUGIN', get_option('plugins'))
 config_host_data.set('CONFIG_RBD', rbd.found())
+config_host_data.set('CONFIG_VITASTOR', vitastor.found())
 config_host_data.set('CONFIG_RDMA', rdma.found())
 config_host_data.set('CONFIG_RELOCATABLE', get_option('relocatable'))
 config_host_data.set('CONFIG_SAFESTACK', get_option('safe_stack'))
@@ -4984,6 +5005,7 @@ summary_info += {'fdt support':       fd
 summary_info += {'libcap-ng support': libcap_ng}
 summary_info += {'bpf support':       libbpf}
 summary_info += {'rbd support':       rbd}
+summary_info += {'vitastor support':  vitastor}
 summary_info += {'smartcard support': cacard}
 summary_info += {'U2F support':       u2f}
 summary_info += {'libusb':            libusb}
Index: pve-qemu-kvm-10.1.2/meson_options.txt
===================================================================
--- pve-qemu-kvm-10.1.2.orig/meson_options.txt
+++ pve-qemu-kvm-10.1.2/meson_options.txt
@@ -202,6 +202,8 @@ option('pvg', type: 'feature', value: 'a
        description: 'macOS paravirtualized graphics support')
 option('rbd', type : 'feature', value : 'auto',
        description: 'Ceph block device driver')
+option('vitastor', type : 'feature', value : 'auto',
+       description: 'Vitastor block device driver')
 option('opengl', type : 'feature', value : 'auto',
        description: 'OpenGL support')
 option('rdma', type : 'feature', value : 'auto',
Index: pve-qemu-kvm-10.1.2/qapi/block-core.json
===================================================================
--- pve-qemu-kvm-10.1.2.orig/qapi/block-core.json
+++ pve-qemu-kvm-10.1.2/qapi/block-core.json
@@ -3647,7 +3647,7 @@
             'raw', 'rbd',
             { 'name': 'replication', 'if': 'CONFIG_REPLICATION' },
             'pbs',
-            'ssh', 'throttle', 'vdi', 'vhdx',
+            'ssh', 'throttle', 'vdi', 'vhdx', 'vitastor',
             { 'name': 'virtio-blk-vfio-pci', 'if': 'CONFIG_BLKIO' },
             { 'name': 'virtio-blk-vhost-user', 'if': 'CONFIG_BLKIO' },
             { 'name': 'virtio-blk-vhost-vdpa', 'if': 'CONFIG_BLKIO' },
@@ -4773,6 +4773,28 @@
             '*server': ['InetSocketAddressBase'] } }
 
 ##
+# @BlockdevOptionsVitastor:
+#
+# Driver specific block device options for vitastor
+#
+# @image:       Image name
+# @inode:       Inode number
+# @pool:        Pool ID
+# @size:        Desired image size in bytes
+# @config-path: Path to Vitastor configuration
+# @etcd-host:   etcd connection address(es)
+# @etcd-prefix: etcd key/value prefix
+##
+{ 'struct': 'BlockdevOptionsVitastor',
+  'data': { '*inode': 'uint64',
+            '*pool': 'uint64',
+            '*size': 'uint64',
+            '*image': 'str',
+            '*config-path': 'str',
+            '*etcd-host': 'str',
+            '*etcd-prefix': 'str' } }
+
+##
 # @ReplicationMode:
 #
 # An enumeration of replication modes.
@@ -5242,6 +5264,7 @@
       'throttle':   'BlockdevOptionsThrottle',
       'vdi':        'BlockdevOptionsGenericFormat',
       'vhdx':       'BlockdevOptionsGenericFormat',
+      'vitastor':   'BlockdevOptionsVitastor',
       'virtio-blk-vfio-pci':
                     { 'type': 'BlockdevOptionsVirtioBlkVfioPci',
                       'if': 'CONFIG_BLKIO' },
@@ -5722,6 +5745,20 @@
             '*encrypt' :        'RbdEncryptionCreateOptions' } }
 
 ##
+# @BlockdevCreateOptionsVitastor:
+#
+# Driver specific image creation options for Vitastor.
+#
+# @location: Where to store the new image file.  This location cannot
+#     point to a snapshot.
+#
+# @size: Size of the virtual disk in bytes
+##
+{ 'struct': 'BlockdevCreateOptionsVitastor',
+  'data': { 'location':         'BlockdevOptionsVitastor',
+            'size':             'size' } }
+
+##
 # @BlockdevVmdkSubformat:
 #
 # Subformat options for VMDK images
@@ -5943,6 +5980,7 @@
       'ssh':            'BlockdevCreateOptionsSsh',
       'vdi':            'BlockdevCreateOptionsVdi',
       'vhdx':           'BlockdevCreateOptionsVhdx',
+      'vitastor':       'BlockdevCreateOptionsVitastor',
       'vmdk':           'BlockdevCreateOptionsVmdk',
       'vpc':            'BlockdevCreateOptionsVpc'
   } }
Index: pve-qemu-kvm-10.1.2/scripts/meson-buildoptions.sh
===================================================================
--- pve-qemu-kvm-10.1.2.orig/scripts/meson-buildoptions.sh
+++ pve-qemu-kvm-10.1.2/scripts/meson-buildoptions.sh
@@ -175,6 +175,7 @@ meson_options_help() {
   printf "%s\n" '  qga-vss         build QGA VSS support (broken with MinGW)'
   printf "%s\n" '  qpl             Query Processing Library support'
   printf "%s\n" '  rbd             Ceph block device driver'
+  printf "%s\n" '  vitastor        Vitastor block device driver'
   printf "%s\n" '  rdma            Enable RDMA-based migration'
   printf "%s\n" '  replication     replication support'
   printf "%s\n" '  rust            Rust support'
@@ -459,6 +460,8 @@ _meson_option_parse() {
     --disable-qpl) printf "%s" -Dqpl=disabled ;;
     --enable-rbd) printf "%s" -Drbd=enabled ;;
     --disable-rbd) printf "%s" -Drbd=disabled ;;
+    --enable-vitastor) printf "%s" -Dvitastor=enabled ;;
+    --disable-vitastor) printf "%s" -Dvitastor=disabled ;;
     --enable-rdma) printf "%s" -Drdma=enabled ;;
     --disable-rdma) printf "%s" -Drdma=disabled ;;
     --enable-relocatable) printf "%s" -Drelocatable=true ;;
