From 6798455893431c1d1f6f33057dcc729de87d2e1a Mon Sep 17 00:00:00 2001
From: rread <rread>
Date: Thu, 20 Feb 2003 06:52:56 +0000
Subject: [PATCH] - completing the move of UUID registration from portals to
 lustre.   Need to merge with multinet to finish this.

---
 lustre/obdclass/lustre_peer.c | 179 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 179 insertions(+)
 create mode 100644 lustre/obdclass/lustre_peer.c

diff --git a/lustre/obdclass/lustre_peer.c b/lustre/obdclass/lustre_peer.c
new file mode 100644
index 0000000..35ac141
--- /dev/null
+++ b/lustre/obdclass/lustre_peer.c
@@ -0,0 +1,179 @@
+/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
+ * vim:expandtab:shiftwidth=8:tabstop=8:
+ *
+ *  Copyright (c) 2002, 2003 Cluster File Systems, Inc.
+ *
+ *   This file is part of Lustre, http://www.lustre.org.
+ *
+ *   Lustre is free software; you can redistribute it and/or
+ *   modify it under the terms of version 2 of the GNU General Public
+ *   License as published by the Free Software Foundation.
+ *
+ *   Lustre is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with Lustre; if not, write to the Free Software
+ *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ */
+
+#define DEBUG_SUBSYSTEM S_RPC
+
+#ifdef __KERNEL__
+# include <linux/module.h>
+# include <linux/init.h>
+# include <linux/list.h>
+#else
+# include <liblustre.h>
+#endif
+#include <linux/obd.h>
+#include <linux/obd_support.h>
+#include <linux/obd_class.h>
+#include <linux/lustre_lib.h>
+#include <linux/lustre_ha.h>
+#include <linux/lustre_net.h>
+#include <linux/lprocfs_status.h>
+
+struct uuid_nid_data {
+        struct list_head head;
+        char *uuid;
+        __u32 nid;
+        __u32 nal;
+        ptl_handle_ni_t ni;
+};
+
+/* FIXME: This should probably become more elegant than a global linked list */
+static struct list_head g_uuid_list;
+static spinlock_t       g_uuid_lock;
+
+void class_init_uuidlist(void)
+{
+        INIT_LIST_HEAD(&g_uuid_list);
+        spin_lock_init(&g_uuid_lock);
+}
+
+void class_exit_uuidlist(void)
+{
+        struct list_head *tmp, *n;
+
+        /* Module going => sole user => don't need to lock g_uuid_list */
+        list_for_each_safe(tmp, n, &g_uuid_list) {
+                struct uuid_nid_data *data =
+                        list_entry(tmp, struct uuid_nid_data, head);
+
+                PORTAL_FREE(data->uuid, strlen(data->uuid) + 1);
+                PORTAL_FREE(data, sizeof(*data));
+        }
+}
+
+int class_uuid_to_peer(char *uuid, struct lustre_peer *peer)
+{
+        struct list_head *tmp;
+
+        spin_lock (&g_uuid_lock);
+
+        list_for_each(tmp, &g_uuid_list) {
+                struct uuid_nid_data *data =
+                        list_entry(tmp, struct uuid_nid_data, head);
+
+                if (strcmp(data->uuid, uuid) == 0) {
+                        peer->peer_nid = data->nid;
+                        peer->peer_ni = data->ni;
+
+                        spin_unlock (&g_uuid_lock);
+                        return 0;
+                }
+        }
+
+        spin_unlock (&g_uuid_lock);
+        return -1;
+}
+
+int class_add_uuid(char *uuid, __u64 nid, __u32 nal)
+{
+        const ptl_handle_ni_t *nip;
+        struct uuid_nid_data *data;
+        int rc;
+        int nob = strnlen (uuid, PAGE_SIZE) + 1;
+
+        if (nob > PAGE_SIZE)
+                return -EINVAL;
+        
+        nip = kportal_get_ni (nal);
+        if (nip == NULL) {
+                CERROR("get_ni failed: is the NAL module loaded?\n");
+                return -EIO;
+        }
+
+        rc = -ENOMEM;
+        PORTAL_ALLOC(data, sizeof(*data));
+        if (data == NULL)
+                goto fail_0;
+
+        PORTAL_ALLOC(data->uuid, nob);
+        if (data == NULL)
+                goto fail_1;
+
+        memcpy(data->uuid, uuid, nob);
+        data->nid = nid;
+        data->nal = nal;
+        data->ni  = *nip;
+
+        spin_lock (&g_uuid_lock);
+
+        list_add(&data->head, &g_uuid_list);
+
+        spin_unlock (&g_uuid_lock);
+
+        return 0;
+
+ fail_1:
+        PORTAL_FREE (data, sizeof (*data));
+ fail_0:
+        kportal_put_ni (nal);
+        return (rc);
+}
+
+/* delete only one entry if uuid is specified, otherwise delete all */
+int class_del_uuid (char *uuid)
+{
+        struct list_head  deathrow;
+        struct list_head *tmp;
+        struct list_head *n;
+        struct uuid_nid_data *data;
+        
+        INIT_LIST_HEAD (&deathrow);
+        
+        spin_lock (&g_uuid_lock);
+
+        list_for_each_safe(tmp, n, &g_uuid_list) {
+                data = list_entry(tmp, struct uuid_nid_data, head);
+
+                if (uuid == NULL || strcmp(data->uuid, uuid) == 0) {
+                        list_del (&data->head);
+                        list_add (&data->head, &deathrow);
+                        if (uuid)
+                                break;
+                }
+        }
+
+        spin_unlock (&g_uuid_lock);
+
+        if (list_empty (&deathrow))
+                return -EINVAL;
+        
+        do {
+                data = list_entry(deathrow.next, struct uuid_nid_data, head);
+
+                list_del (&data->head);
+
+                kportal_put_ni (data->nal);
+                PORTAL_FREE(data->uuid, strlen(data->uuid) + 1);
+                PORTAL_FREE(data, sizeof(*data));
+        } while (!list_empty (&deathrow));
+        
+        return 0;
+}
-- 
1.8.3.1