add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/fs/afs/server_list.c
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..
@@ -1,12 +1,8 @@
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+// SPDX-License-Identifier: GPL-2.0-or-later
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 /* AFS fileserver list management.
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  *
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  * Copyright (C) 2017 Red Hat, Inc. All Rights Reserved.
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  * Written by David Howells (dhowells@redhat.com)
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- *
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- * This program is free software; you can redistribute it and/or
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- * modify it under the terms of the GNU General Public License
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- * as published by the Free Software Foundation; either version
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- * 2 of the License, or (at your option) any later version.
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  */
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 #include <linux/kernel.h>
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@@ -18,10 +14,9 @@
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 	int i;
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 	if (slist && refcount_dec_and_test(&slist->usage)) {
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-		for (i = 0; i < slist->nr_servers; i++) {
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-			afs_put_cb_interest(net, slist->servers[i].cb_interest);
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-			afs_put_server(net, slist->servers[i].server);
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-		}
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+		for (i = 0; i < slist->nr_servers; i++)
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+			afs_unuse_server(net, slist->servers[i].server,
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+					 afs_server_trace_put_slist);
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 		kfree(slist);
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 	}
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 }
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@@ -42,21 +37,23 @@
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 		if (vldb->fs_mask[i] & type_mask)
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 			nr_servers++;
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-	slist = kzalloc(sizeof(struct afs_server_list) +
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-			sizeof(struct afs_server_entry) * nr_servers,
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-			GFP_KERNEL);
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+	slist = kzalloc(struct_size(slist, servers, nr_servers), GFP_KERNEL);
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 	if (!slist)
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 		goto error;
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 	refcount_set(&slist->usage, 1);
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 	rwlock_init(&slist->lock);
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+	for (i = 0; i < AFS_MAXTYPES; i++)
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+		slist->vids[i] = vldb->vid[i];
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+
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 	/* Make sure a records exists for each server in the list. */
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 	for (i = 0; i < vldb->nr_servers; i++) {
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 		if (!(vldb->fs_mask[i] & type_mask))
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 			continue;
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-		server = afs_lookup_server(cell, key, &vldb->fs_server[i]);
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+		server = afs_lookup_server(cell, key, &vldb->fs_server[i],
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+					   vldb->addr_version[i]);
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 		if (IS_ERR(server)) {
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 			ret = PTR_ERR(server);
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 			if (ret == -ENOENT ||
..
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@@ -73,7 +70,8 @@
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 				break;
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 		if (j < slist->nr_servers) {
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 			if (slist->servers[j].server == server) {
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-				afs_put_server(cell->net, server);
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+				afs_put_server(cell->net, server,
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+					       afs_server_trace_put_slist_isort);
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 				continue;
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 			}
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..
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@@ -118,39 +116,13 @@
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 	return false;
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 changed:
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-	/* Maintain the same current server as before if possible. */
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-	cur = old->servers[old->index].server;
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+	/* Maintain the same preferred server as before if possible. */
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+	cur = old->servers[old->preferred].server;
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 	for (j = 0; j < new->nr_servers; j++) {
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 		if (new->servers[j].server == cur) {
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-			new->index = j;
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+			new->preferred = j;
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 			break;
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 		}
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-	}
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-
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-	/* Keep the old callback interest records where possible so that we
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-	 * maintain callback interception.
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-	 */
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-	i = 0;
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-	j = 0;
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-	while (i < old->nr_servers && j < new->nr_servers) {
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-		if (new->servers[j].server == old->servers[i].server) {
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-			struct afs_cb_interest *cbi = old->servers[i].cb_interest;
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-			if (cbi) {
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-				new->servers[j].cb_interest = cbi;
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-				refcount_inc(&cbi->usage);
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-			}
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-			i++;
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-			j++;
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-			continue;
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-		}
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-
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-		if (new->servers[j].server < old->servers[i].server) {
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-			j++;
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-			continue;
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-		}
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-
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-		i++;
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-		continue;
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 	}
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 	return true;