[LU-11507] lustre doesn't build against zfs master: refcount_add missing

Related — Wed, 7 Nov 2018 13:05:09 +0000

The latest lustre will not build against ZFS master:

  CC [M]  /home/hutter/lustre-release/lustre/osd-zfs/osd_handler.o
 In file included from /home/hutter/lustre-release/lustre/osd-zfs/osd_handler.c:52:0:
 /home/hutter/lustre-release/lustre/osd-zfs/osd_internal.h: In function 'osd_sa_handle_get':
 /home/hutter/lustre-release/lustre/osd-zfs/osd_internal.h:929:2: error: implicit declaration of function 'refcount_add' [-Werror=implicit-function-declaration]
  refcount_add(&dn->dn_bonus->db_holds, osd_obj_tag);

refcount_add was removed in ZFS in:

Linux 4.19-rc3+ compat: Remove refcount_t compat (https://github.com/zfsonlinux/zfs/pull/7932).

That patch is expected to be included in zfs-0.7.12 as well.

Lustre should be updated to use zfs_refcount_add() if it exists, and then fall back to refcount_add if not.

Whamcloud Community JIRA

[LU-11507] lustre doesn't build against zfs master: refcount_add missing