On 14.11.2023 12:39, Mateusz Guzik wrote:
One of the vnodes is probably not zfs, I suspect this will do it (untested):

diff --git a/sys/contrib/openzfs/module/os/freebsd/zfs/zfs_vnops_os.c
b/sys/contrib/openzfs/module/os/freebsd/zfs/zfs_vnops_os.c
index 107cd69c756c..e799a7091b8e 100644
--- a/sys/contrib/openzfs/module/os/freebsd/zfs/zfs_vnops_os.c
+++ b/sys/contrib/openzfs/module/os/freebsd/zfs/zfs_vnops_os.c
@@ -6270,6 +6270,11 @@ zfs_freebsd_copy_file_range(struct
vop_copy_file_range_args *ap)
                         goto bad_write_fallback;
                 }
         }
+
+       if (invp->v_mount->mnt_vfc != outvp->v_mount->mnt_vfc) {
+               goto bad_write_fallback;
+       }
+
         if (invp == outvp) {
                 if (vn_lock(outvp, LK_EXCLUSIVE) != 0) {
                         goto bad_write_fallback;


vn_copy_file_range() verifies for that:

        /*
         * 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 system types.
         */
        *lenp = len;
        if (inmp == outmp || strcmp(inmp->mnt_vfc->vfc_name,
            outmp->mnt_vfc->vfc_name) == 0)
                error = VOP_COPY_FILE_RANGE(invp, inoffp, outvp, outoffp,
                    lenp, flags, incred, outcred, fsize_td);
        else
                error = vn_generic_copy_file_range(invp, inoffp, outvp,
                    outoffp, lenp, flags, incred, outcred, fsize_td);


--
Alexander Motin

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