nfsd: add a list_head arg to nfsd_foreach_client_lock

In a later patch, we'll want to collect the locks onto a list for later
destruction. If "func" is defined and "collect" is defined, then we'll
add the lock stateid to the list.

Signed-off-by: Jeff Layton <jlayton@primarydata.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>

diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index 226d89e2c7b29404fbeae3f1ed712f5856a7dd38..b661294144ba0f8fed5dacf8162f90814003be97 100644 (file)
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -5811,6 +5811,7 @@ static void nfsd_print_count(struct nfs4_client *clp, unsigned int count,
 }
 
 static u64 nfsd_foreach_client_lock(struct nfs4_client *clp, u64 max,
+                                   struct list_head *collect,
                                    void (*func)(struct nfs4_ol_stateid *))
 {
        struct nfs4_openowner *oop;
@@ -5823,8 +5824,12 @@ static u64 nfsd_foreach_client_lock(struct nfs4_client *clp, u64 max,
                                &oop->oo_owner.so_stateids, st_perstateowner) {
                        list_for_each_entry_safe(lst, lst_next,
                                        &stp->st_locks, st_locks) {
-                               if (func)
+                               if (func) {
                                        func(lst);
+                                       if (collect)
+                                               list_add(&lst->st_locks,
+                                                        collect);
+                               }
                                if (++count == max)
                                        return count;
                        }
@@ -5836,12 +5841,12 @@ static u64 nfsd_foreach_client_lock(struct nfs4_client *clp, u64 max,
 
 u64 nfsd_forget_client_locks(struct nfs4_client *clp, u64 max)
 {
-       return nfsd_foreach_client_lock(clp, max, release_lock_stateid);
+       return nfsd_foreach_client_lock(clp, max, NULL, release_lock_stateid);
 }
 
 u64 nfsd_print_client_locks(struct nfs4_client *clp, u64 max)
 {
-       u64 count = nfsd_foreach_client_lock(clp, max, NULL);
+       u64 count = nfsd_foreach_client_lock(clp, max, NULL, NULL);
        nfsd_print_count(clp, count, "locked files");
        return count;
 }