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223 lines
7.9 KiB
Text
223 lines
7.9 KiB
Text
From: Suresh Jayaraman <sjayaraman-l3A5Bk7waGM@public.gmane.org>
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Subject: [RFC][PATCH 04/10] cifs: define server-level cache index objects and register them with FS-Cache
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Date: Tue, 22 Jun 2010 20:53:18 +0530
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Lines: 186
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Message-ID: <1277220198-3522-1-git-send-email-sjayaraman@suse.de>
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References: <yes>
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Cc: linux-cifs-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-fsdevel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
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linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, David Howells <dhowells-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
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To: Steve French <smfrench-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
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X-From: linux-cifs-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org Tue Jun 22 17:44:26 2010
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Return-path: <linux-cifs-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>
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Envelope-to: glkc-linux-cifs-1dZseelyfdZg9hUCZPvPmw@public.gmane.org
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Received: from vger.kernel.org ([209.132.180.67])
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by lo.gmane.org with esmtp (Exim 4.69)
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(envelope-from <linux-cifs-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>)
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id 1OR5eD-0008G7-KP
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for glkc-linux-cifs-1dZseelyfdZg9hUCZPvPmw@public.gmane.org; Tue, 22 Jun 2010 17:44:26 +0200
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Received: (majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org) by vger.kernel.org via listexpand
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id S1753942Ab0FVPoC (ORCPT <rfc822;glkc-linux-cifs@m.gmane.org>);
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Tue, 22 Jun 2010 11:44:02 -0400
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Received: from victor.provo.novell.com ([137.65.250.26]:58783 "EHLO
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victor.provo.novell.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org
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with ESMTP id S1751265Ab0FVPoA (ORCPT
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<rfc822;groupwise-SJayaraman-Et1tbQHTxzrQT0dZR+AlfA@public.gmane.org:0:0>);
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Tue, 22 Jun 2010 11:44:00 -0400
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Received: from localhost (prv-ext-foundry1int.gns.novell.com [137.65.251.240])
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by victor.provo.novell.com with ESMTP; Tue, 22 Jun 2010 09:23:20 -0600
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X-Mailer: git-send-email 1.6.4.2
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In-Reply-To: <yes>
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Sender: linux-cifs-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
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Precedence: bulk
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List-ID: <linux-cifs.vger.kernel.org>
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X-Mailing-List: linux-cifs-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
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Archived-At: <http://permalink.gmane.org/gmane.linux.kernel/1001760>
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Define server-level cache index objects (as managed by TCP_ServerInfo structs).
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Each server object is created in the CIFS top-level index object and is itself
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an index into which superblock-level objects are inserted.
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Currently, the server objects are keyed by hostname.
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Signed-off-by: Suresh Jayaraman <sjayaraman-l3A5Bk7waGM@public.gmane.org>
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---
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fs/cifs/Makefile | 2 +-
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fs/cifs/cache.c | 25 +++++++++++++++++++++++++
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fs/cifs/cifsglob.h | 3 +++
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fs/cifs/connect.c | 4 ++++
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fs/cifs/fscache.c | 47 +++++++++++++++++++++++++++++++++++++++++++++++
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fs/cifs/fscache.h | 12 ++++++++++++
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6 files changed, 92 insertions(+), 1 deletion(-)
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create mode 100644 fs/cifs/fscache.c
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Index: cifs-2.6/fs/cifs/Makefile
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===================================================================
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--- cifs-2.6.orig/fs/cifs/Makefile
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+++ cifs-2.6/fs/cifs/Makefile
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@@ -12,4 +12,4 @@ cifs-$(CONFIG_CIFS_UPCALL) += cifs_spneg
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cifs-$(CONFIG_CIFS_DFS_UPCALL) += dns_resolve.o cifs_dfs_ref.o
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-cifs-$(CONFIG_CIFS_FSCACHE) += cache.o
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+cifs-$(CONFIG_CIFS_FSCACHE) += fscache.o cache.o
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Index: cifs-2.6/fs/cifs/cache.c
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===================================================================
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--- cifs-2.6.orig/fs/cifs/cache.c
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+++ cifs-2.6/fs/cifs/cache.c
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@@ -51,3 +51,28 @@ void cifs_fscache_unregister(void)
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fscache_unregister_netfs(&cifs_fscache_netfs);
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}
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+/*
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+ * Server object currently keyed by hostname
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+ */
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+static uint16_t cifs_server_get_key(const void *cookie_netfs_data,
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+ void *buffer, uint16_t maxbuf)
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+{
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+ const struct TCP_Server_Info *server = cookie_netfs_data;
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+ uint16_t len = strnlen(server->hostname, sizeof(server->hostname));
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+
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+ if (len > maxbuf)
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+ return 0;
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+
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+ memcpy(buffer, server->hostname, len);
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+
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+ return len;
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+}
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+
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+/*
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+ * Server object for FS-Cache
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+ */
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+const struct fscache_cookie_def cifs_fscache_server_index_def = {
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+ .name = "CIFS.server",
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+ .type = FSCACHE_COOKIE_TYPE_INDEX,
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+ .get_key = cifs_server_get_key,
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+};
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Index: cifs-2.6/fs/cifs/cifsglob.h
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===================================================================
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--- cifs-2.6.orig/fs/cifs/cifsglob.h
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+++ cifs-2.6/fs/cifs/cifsglob.h
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@@ -193,6 +193,9 @@ struct TCP_Server_Info {
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bool sec_mskerberos; /* supports legacy MS Kerberos */
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bool sec_kerberosu2u; /* supports U2U Kerberos */
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bool sec_ntlmssp; /* supports NTLMSSP */
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+#ifdef CONFIG_CIFS_FSCACHE
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+ struct fscache_cookie *fscache; /* client index cache cookie */
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+#endif
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};
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/*
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Index: cifs-2.6/fs/cifs/connect.c
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===================================================================
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--- cifs-2.6.orig/fs/cifs/connect.c
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+++ cifs-2.6/fs/cifs/connect.c
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@@ -48,6 +48,7 @@
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#include "nterr.h"
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#include "rfc1002pdu.h"
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#include "cn_cifs.h"
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+#include "fscache.h"
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#define CIFS_PORT 445
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#define RFC1001_PORT 139
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@@ -1453,6 +1454,8 @@ cifs_put_tcp_session(struct TCP_Server_I
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return;
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}
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+ cifs_fscache_release_client_cookie(server);
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+
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list_del_init(&server->tcp_ses_list);
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write_unlock(&cifs_tcp_ses_lock);
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@@ -1572,6 +1575,7 @@ cifs_get_tcp_session(struct smb_vol *vol
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goto out_err;
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}
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+ cifs_fscache_get_client_cookie(tcp_ses);
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/* thread spawned, put it on the list */
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write_lock(&cifs_tcp_ses_lock);
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list_add(&tcp_ses->tcp_ses_list, &cifs_tcp_ses_list);
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Index: cifs-2.6/fs/cifs/fscache.c
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===================================================================
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--- /dev/null
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+++ cifs-2.6/fs/cifs/fscache.c
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@@ -0,0 +1,47 @@
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+/*
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+ * fs/cifs/fscache.c - CIFS filesystem cache interface
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+ *
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+ * Copyright (c) 2010 Novell, Inc.
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+ * Authors(s): Suresh Jayaraman (sjayaraman-l3A5Bk7waGM@public.gmane.org>
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+ *
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+ * This library is free software; you can redistribute it and/or modify
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+ * it under the terms of the GNU Lesser General Public License as published
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+ * by the Free Software Foundation; either version 2.1 of the License, or
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+ * (at your option) any later version.
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+ *
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+ * This library is distributed in the hope that it will be useful,
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+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
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+ * the GNU Lesser General Public License for more details.
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+ *
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+ * You should have received a copy of the GNU Lesser General Public License
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+ * along with this library; if not, write to the Free Software
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+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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+ */
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+#include <linux/init.h>
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+#include <linux/kernel.h>
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+#include <linux/sched.h>
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+#include <linux/mm.h>
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+#include <linux/in6.h>
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+
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+#include "fscache.h"
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+#include "cifsglob.h"
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+#include "cifs_debug.h"
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+
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+void cifs_fscache_get_client_cookie(struct TCP_Server_Info *server)
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+{
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+ server->fscache =
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+ fscache_acquire_cookie(cifs_fscache_netfs.primary_index,
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+ &cifs_fscache_server_index_def, server);
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+ cFYI(1, "CIFS: get client cookie (0x%p/0x%p)\n",
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+ server, server->fscache);
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+}
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+
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+void cifs_fscache_release_client_cookie(struct TCP_Server_Info *server)
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+{
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+ cFYI(1, "CIFS: release client cookie (0x%p/0x%p)\n",
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+ server, server->fscache);
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+ fscache_relinquish_cookie(server->fscache, 0);
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+ server->fscache = NULL;
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+}
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+
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Index: cifs-2.6/fs/cifs/fscache.h
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===================================================================
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--- cifs-2.6.orig/fs/cifs/fscache.h
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+++ cifs-2.6/fs/cifs/fscache.h
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@@ -27,14 +27,26 @@
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#ifdef CONFIG_CIFS_FSCACHE
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extern struct fscache_netfs cifs_fscache_netfs;
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+extern const struct fscache_cookie_def cifs_fscache_server_index_def;
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extern int cifs_fscache_register(void);
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extern void cifs_fscache_unregister(void);
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+/*
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+ * fscache.c
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+ */
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+extern void cifs_fscache_get_client_cookie(struct TCP_Server_Info *);
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+extern void cifs_fscache_release_client_cookie(struct TCP_Server_Info *);
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+
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#else /* CONFIG_CIFS_FSCACHE */
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static inline int cifs_fscache_register(void) { return 0; }
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static inline void cifs_fscache_unregister(void) {}
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+static inline void
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+cifs_fscache_get_client_cookie(struct TCP_Server_Info *server) {}
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+static inline void
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+cifs_fscache_get_client_cookie(struct TCP_Server_Info *server); {}
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+
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#endif /* CONFIG_CIFS_FSCACHE */
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#endif /* _CIFS_FSCACHE_H */
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