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diff --git a/share/man/man9/VOP_COPY_FILE_RANGE.9 b/share/man/man9/VOP_COPY_FILE_RANGE.9
--- a/share/man/man9/VOP_COPY_FILE_RANGE.9
+++ b/share/man/man9/VOP_COPY_FILE_RANGE.9
@@ -28,8 +28,8 @@
.Os
.Sh NAME
.Nm VOP_COPY_FILE_RANGE
-.Nd copy a byte range from one file to another or within one file
-in a single file system
+.Nd copy a byte range within a file or from one file to another in a single
+file system or between multiple file systems
.Sh SYNOPSIS
.In sys/param.h
.In sys/vnode.h
diff --git a/sys/fs/nfsclient/nfs_clvnops.c b/sys/fs/nfsclient/nfs_clvnops.c
--- a/sys/fs/nfsclient/nfs_clvnops.c
+++ b/sys/fs/nfsclient/nfs_clvnops.c
@@ -3898,8 +3898,11 @@
off_t inoff, outoff;
bool consecutive, must_commit, tryoutcred;
- /* NFSv4.2 Copy is not permitted for infile == outfile. */
- if (invp == outvp) {
+ /*
+ * NFSv4.2 Copy is not permitted for infile == outfile.
+ * TODO: copy_file_range() between multiple NFS mountpoints
+ */
+ if (invp == outvp || invp->v_mount != outvp->v_mount) {
generic_copy:
return (vn_generic_copy_file_range(invp, ap->a_inoffp,
outvp, ap->a_outoffp, ap->a_lenp, ap->a_flags,
diff --git a/sys/kern/vfs_vnops.c b/sys/kern/vfs_vnops.c
--- a/sys/kern/vfs_vnops.c
+++ b/sys/kern/vfs_vnops.c
@@ -3076,12 +3076,14 @@
goto out;
/*
- * If the two vnode are for the same file system, call
+ * If the two vnodes are for the same file system type, call
* VOP_COPY_FILE_RANGE(), otherwise call vn_generic_copy_file_range()
- * which can handle copies across multiple file systems.
+ * which can handle copies across multiple file system types.
*/
*lenp = len;
- if (invp->v_mount == outvp->v_mount)
+ if (invp->v_mount == outvp->v_mount ||
+ strcmp(invp->v_mount->mnt_vfc->vfc_name,
+ outvp->v_mount->mnt_vfc->vfc_name) == 0)
error = VOP_COPY_FILE_RANGE(invp, inoffp, outvp, outoffp,
lenp, flags, incred, outcred, fsize_td);
else

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