NFSD: Clean up forgetting and recalling delegations

Once I have a client, I can easily use its delegation list rather than
searching the file hash table for delegations to remove.

Signed-off-by: Bryan Schumaker <bjschuma@netapp.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>

1 files changed, 50 insertions, 44 deletions

diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index 00d4398e2324..dc7c22f14fef 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -4657,6 +4657,52 @@ u64 nfsd_forget_client_openowners(struct nfs4_client *clp, u64 max)
         return nfsd_foreach_client_open(clp, max, release_openowner);
 }
 
+static u64 nfsd_find_all_delegations(struct nfs4_client *clp, u64 max,
+                                     struct list_head *victims)
+{
+        struct nfs4_delegation *dp, *next;
+        u64 count = 0;
+
+        list_for_each_entry_safe(dp, next, &clp->cl_delegations, dl_perclnt) {
+                if (victims)
+                        list_move(&dp->dl_recall_lru, victims);
+                if (++count == max)
+                        break;
+        }
+        return count;
+}
+
+u64 nfsd_forget_client_delegations(struct nfs4_client *clp, u64 max)
+{
+        struct nfs4_delegation *dp, *next;
+        LIST_HEAD(victims);
+        u64 count;
+
+        spin_lock(&recall_lock);
+        count = nfsd_find_all_delegations(clp, max, &victims);
+        spin_unlock(&recall_lock);
+
+        list_for_each_entry_safe(dp, next, &victims, dl_recall_lru)
+                unhash_delegation(dp);
+
+        return count;
+}
+
+u64 nfsd_recall_client_delegations(struct nfs4_client *clp, u64 max)
+{
+        struct nfs4_delegation *dp, *next;
+        LIST_HEAD(victims);
+        u64 count;
+
+        spin_lock(&recall_lock);
+        count = nfsd_find_all_delegations(clp, max, &victims);
+        list_for_each_entry_safe(dp, next, &victims, dl_recall_lru)
+                nfsd_break_one_deleg(dp);
+        spin_unlock(&recall_lock);
+
+        return count;
+}
+
 u64 nfsd_for_n_state(u64 max, u64 (*func)(struct nfs4_client *, u64))
 {
         struct nfs4_client *clp, *next;
@@ -4693,56 +4739,16 @@ void nfsd_forget_openowners(u64 num)
         printk(KERN_INFO "NFSD: Forgot %llu open owners", count);
 }
 
-static int nfsd_process_n_delegations(u64 num, struct list_head *list)
-{
-        int i, count = 0;
-        struct nfs4_file *fp, *fnext;
-        struct nfs4_delegation *dp, *dnext;
-
-        for (i = 0; i < FILE_HASH_SIZE; i++) {
-                list_for_each_entry_safe(fp, fnext, &file_hashtbl[i], fi_hash) {
-                        list_for_each_entry_safe(dp, dnext, &fp->fi_delegations, dl_perfile) {
-                                list_move(&dp->dl_recall_lru, list);
-                                if (++count == num)
-                                        return count;
-                        }
-                }
-        }
-
-        return count;
-}
-
 void nfsd_forget_delegations(u64 num)
 {
-        unsigned int count;
-        LIST_HEAD(victims);
-        struct nfs4_delegation *dp, *dnext;
-
-        spin_lock(&recall_lock);
-        count = nfsd_process_n_delegations(num, &victims);
-        spin_unlock(&recall_lock);
-
-        list_for_each_entry_safe(dp, dnext, &victims, dl_recall_lru)
-                unhash_delegation(dp);
-
-        printk(KERN_INFO "NFSD: Forgot %d delegations", count);
+        u64 count = nfsd_for_n_state(num, nfsd_forget_client_delegations);
+        printk(KERN_INFO "NFSD: Forgot %llu delegations", count);
 }
 
 void nfsd_recall_delegations(u64 num)
 {
-        unsigned int count;
-        LIST_HEAD(victims);
-        struct nfs4_delegation *dp, *dnext;
-
-        spin_lock(&recall_lock);
-        count = nfsd_process_n_delegations(num, &victims);
-        list_for_each_entry_safe(dp, dnext, &victims, dl_recall_lru) {
-                list_del(&dp->dl_recall_lru);
-                nfsd_break_one_deleg(dp);
-        }
-        spin_unlock(&recall_lock);
-
-        printk(KERN_INFO "NFSD: Recalled %d delegations", count);
+        u64 count = nfsd_for_n_state(num, nfsd_recall_client_delegations);
+        printk(KERN_INFO "NFSD: Recalled %llu delegations", count);
 }
 
 #endif /* CONFIG_NFSD_FAULT_INJECTION */