NFSv4.1: Fix nfs4_callback_recallslot to work with dynamic slot allocation

Ensure that the NFSv4.1 CB_RECALL_SLOT callback updates the slot table
target max slotid safely.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/fs/nfs/nfs4_fs.h b/fs/nfs/nfs4_fs.h
index 42c58691fb41..5d4e82b10c3c 100644
--- a/fs/nfs/nfs4_fs.h
+++ b/fs/nfs/nfs4_fs.h
@@ -260,6 +260,8 @@ extern int nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data,
 
 extern struct nfs4_slot *nfs4_alloc_slots(struct nfs4_slot_table *table,
                 u32 max_slots, gfp_t gfp_flags);
+extern void nfs41_set_target_slotid(struct nfs4_slot_table *tbl,
+                u32 target_highest_slotid);
 
 static inline bool
 is_ds_only_client(struct nfs_client *clp)