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From: Suresh Jayaraman <sjayaraman-l3A5Bk7waGM@public.gmane.org>
Subject: [RFC][PATCH 03/10] cifs: register CIFS for caching
Date: Tue, 22 Jun 2010 20:53:09 +0530
Lines: 174
Message-ID: <1277220189-3485-1-git-send-email-sjayaraman@suse.de>
References: <yes>
Cc: linux-cifs-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-fsdevel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, David Howells <dhowells-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
To: Steve French <smfrench-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
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Define CIFS for FS-Cache and register for caching. Upon registration the
top-level index object cookie will be stuck to the netfs definition by
FS-Cache.
Signed-off-by: Suresh Jayaraman <sjayaraman-l3A5Bk7waGM@public.gmane.org>
---
fs/cifs/Makefile | 2 ++
fs/cifs/cache.c | 53 +++++++++++++++++++++++++++++++++++++++++++++++++++++
fs/cifs/cifsfs.c | 8 ++++++++
fs/cifs/fscache.h | 40 ++++++++++++++++++++++++++++++++++++++++
4 files changed, 103 insertions(+), 0 deletions(-)
create mode 100644 fs/cifs/cache.c
create mode 100644 fs/cifs/fscache.h
diff --git a/fs/cifs/Makefile b/fs/cifs/Makefile
index 9948c00..e2de709 100644
--- a/fs/cifs/Makefile
+++ b/fs/cifs/Makefile
@@ -11,3 +11,5 @@ cifs-y := cifsfs.o cifssmb.o cifs_debug.o connect.o dir.o file.o inode.o \
cifs-$(CONFIG_CIFS_UPCALL) += cifs_spnego.o
cifs-$(CONFIG_CIFS_DFS_UPCALL) += dns_resolve.o cifs_dfs_ref.o
+
+cifs-$(CONFIG_CIFS_FSCACHE) += cache.o
diff --git a/fs/cifs/cache.c b/fs/cifs/cache.c
new file mode 100644
index 0000000..1080b96
--- /dev/null
+++ b/fs/cifs/cache.c
@@ -0,0 +1,53 @@
+/*
+ * fs/cifs/cache.c - CIFS filesystem cache index structure definitions
+ *
+ * Copyright (c) 2010 Novell, Inc.
+ * Authors(s): Suresh Jayaraman (sjayaraman-l3A5Bk7waGM@public.gmane.org>
+ *
+ * This library is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published
+ * by the Free Software Foundation; either version 2.1 of the License, or
+ * (at your option) any later version.
+ *
+ * This library 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 Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/mm.h>
+
+#include "fscache.h"
+#include "cifsglob.h"
+#include "cifs_debug.h"
+
+/*
+ * CIFS filesystem definition for FS-Cache
+ */
+struct fscache_netfs cifs_fscache_netfs = {
+ .name = "cifs",
+ .version = 0,
+};
+
+/*
+ * Register CIFS for caching with FS-Cache
+ */
+int cifs_fscache_register(void)
+{
+ return fscache_register_netfs(&cifs_fscache_netfs);
+}
+
+/*
+ * Unregister CIFS for caching
+ */
+void cifs_fscache_unregister(void)
+{
+ fscache_unregister_netfs(&cifs_fscache_netfs);
+}
+
diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index 484e52b..c2a7aa9 100644
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -47,6 +47,7 @@
#include <linux/key-type.h>
#include "dns_resolve.h"
#include "cifs_spnego.h"
+#include "fscache.h"
#define CIFS_MAGIC_NUMBER 0xFF534D42 /* the first four bytes of SMB PDUs */
int cifsFYI = 0;
@@ -902,6 +903,10 @@ init_cifs(void)
cFYI(1, "cifs_max_pending set to max of 256");
}
+ rc = cifs_fscache_register();
+ if (rc)
+ goto out;
+
rc = cifs_init_inodecache();
if (rc)
goto out_clean_proc;
@@ -949,8 +954,10 @@ init_cifs(void)
cifs_destroy_mids();
out_destroy_inodecache:
cifs_destroy_inodecache();
+ cifs_fscache_unregister();
out_clean_proc:
cifs_proc_clean();
+ out:
return rc;
}
@@ -959,6 +966,7 @@ exit_cifs(void)
{
cFYI(DBG2, "exit_cifs");
cifs_proc_clean();
+ cifs_fscache_unregister();
#ifdef CONFIG_CIFS_DFS_UPCALL
cifs_dfs_release_automount_timer();
unregister_key_type(&key_type_dns_resolver);
diff --git a/fs/cifs/fscache.h b/fs/cifs/fscache.h
new file mode 100644
index 0000000..cec9e2b
--- /dev/null
+++ b/fs/cifs/fscache.h
@@ -0,0 +1,40 @@
+/*
+ * fs/cifs/fscache.h - CIFS filesystem cache interface definitions
+ *
+ * Copyright (c) 2010 Novell, Inc.
+ * Authors(s): Suresh Jayaraman (sjayaraman-l3A5Bk7waGM@public.gmane.org>
+ *
+ * This library is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published
+ * by the Free Software Foundation; either version 2.1 of the License, or
+ * (at your option) any later version.
+ *
+ * This library 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 Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+#ifndef _CIFS_FSCACHE_H
+#define _CIFS_FSCACHE_H
+
+#include <linux/fscache.h>
+#include "cifsglob.h"
+
+#ifdef CONFIG_CIFS_FSCACHE
+
+extern struct fscache_netfs cifs_fscache_netfs;
+
+extern int cifs_fscache_register(void);
+extern void cifs_fscache_unregister(void);
+
+#else /* CONFIG_CIFS_FSCACHE */
+static inline int cifs_fscache_register(void) { return 0; }
+static inline void cifs_fscache_unregister(void) {}
+
+#endif /* CONFIG_CIFS_FSCACHE */
+
+#endif /* _CIFS_FSCACHE_H */
--
1.6.4.2
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