1 files changed, 28 insertions, 0 deletions
diff --git a/sys-cluster/ceph/files/ceph-10.2.9-rbd-nbd_relax_size_check_for_newer_kernel_versions.patch b/sys-cluster/ceph/files/ceph-10.2.9-rbd-nbd_relax_size_check_for_newer_kernel_versions.patch
new file mode 100644
index 000000000000..5cb89be0edf1
--- /dev/null
+++ b/sys-cluster/ceph/files/ceph-10.2.9-rbd-nbd_relax_size_check_for_newer_kernel_versions.patch
@@ -0,0 +1,28 @@
+diff --git a/src/tools/rbd_nbd/rbd-nbd.cc b/src/tools/rbd_nbd/rbd-nbd.cc
+index 2e399ab832..88e1e0ff65 100644
+--- a/src/tools/rbd_nbd/rbd-nbd.cc
++++ b/src/tools/rbd_nbd/rbd-nbd.cc
+@@ -469,6 +469,10 @@ static int open_device(const char* path, bool try_load_moudle = false)
+ 
+ static int check_device_size(int nbd_index, unsigned long expected_size)
+ {
++  // There are bugs with some older kernel versions that result in an
++  // overflow for large image sizes. This check is to ensure we are
++  // not affected.
++
+   unsigned long size = 0;
+   std::string path = "/sys/block/nbd" + stringify(nbd_index) + "/size";
+   std::ifstream ifs;
+@@ -480,6 +484,12 @@ static int check_device_size(int nbd_index, unsigned long expected_size)
+   ifs >> size;
+   size *= RBD_NBD_BLKSIZE;
+ 
++  if (size == 0) {
++    // Newer kernel versions will report real size only after nbd
++    // connect. Assume this is the case and return success.
++    return 0;
++  }
++
+   if (size != expected_size) {
+     cerr << "rbd-nbd: kernel reported invalid device size (" << size
+          << ", expected " << expected_size << ")" << std::endl;