--- /dev/null
+From: Suresh Jayaraman <sjayaraman-l3A5Bk7waGM@public.gmane.org>
+Subject: [RFC][PATCH 10/10] cifs: add mount option to enable local caching
+Date: Tue, 22 Jun 2010 20:55:09 +0530
+Lines: 66
+Message-ID: <1277220309-3757-1-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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+Archived-At: <http://permalink.gmane.org/gmane.linux.kernel/1001750>
+
+Add a mount option 'fsc' to enable local caching on CIFS.
+
+As the cifs-utils (userspace) changes are not done yet, this patch enables
+'fsc' by default to assist testing.
+
+Signed-off-by: Suresh Jayaraman <sjayaraman-l3A5Bk7waGM@public.gmane.org>
+---
+ fs/cifs/cifs_fs_sb.h | 1 +
+ fs/cifs/connect.c | 8 ++++++++
+ 2 files changed, 9 insertions(+), 0 deletions(-)
+
+diff --git a/fs/cifs/cifs_fs_sb.h b/fs/cifs/cifs_fs_sb.h
+index 246a167..9e77145 100644
+--- a/fs/cifs/cifs_fs_sb.h
++++ b/fs/cifs/cifs_fs_sb.h
+@@ -35,6 +35,7 @@
+ #define CIFS_MOUNT_DYNPERM 0x1000 /* allow in-memory only mode setting */
+ #define CIFS_MOUNT_NOPOSIXBRL 0x2000 /* mandatory not posix byte range lock */
+ #define CIFS_MOUNT_NOSSYNC 0x4000 /* don't do slow SMBflush on every sync*/
++#define CIFS_MOUNT_FSCACHE 0x8000 /* local caching enabled */
+
+ struct cifs_sb_info {
+ struct cifsTconInfo *tcon; /* primary mount */
+diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
+index 4844dbd..6c6ff3c 100644
+--- a/fs/cifs/connect.c
++++ b/fs/cifs/connect.c
+@@ -98,6 +98,7 @@ struct smb_vol {
+ bool noblocksnd:1;
+ bool noautotune:1;
+ bool nostrictsync:1; /* do not force expensive SMBflush on every sync */
++ bool fsc:1; /* enable fscache */
+ unsigned int rsize;
+ unsigned int wsize;
+ bool sockopt_tcp_nodelay:1;
+@@ -843,6 +844,9 @@ cifs_parse_mount_options(char *options, const char *devname,
+ /* default to using server inode numbers where available */
+ vol->server_ino = 1;
+
++ /* XXX: default to fsc for testing until mount.cifs pieces are done */
++ vol->fsc = 1;
++
+ if (!options)
+ return 1;
+
+@@ -1332,6 +1336,8 @@ cifs_parse_mount_options(char *options, const char *devname,
+ printk(KERN_WARNING "CIFS: Mount option noac not "
+ "supported. Instead set "
+ "/proc/fs/cifs/LookupCacheEnabled to 0\n");
++ } else if (strnicmp(data, "fsc", 3) == 0) {
++ vol->fsc = true;
+ } else
+ printk(KERN_WARNING "CIFS: Unknown mount option %s\n",
+ data);
+@@ -2405,6 +2411,8 @@ static void setup_cifs_sb(struct smb_vol *pvolume_info,
+ cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_GID;
+ if (pvolume_info->dynperm)
+ cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DYNPERM;
++ if (pvolume_info->fsc)
++ cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_FSCACHE;
+ if (pvolume_info->direct_io) {
+ cFYI(1, "mounting share using direct i/o");
+ cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DIRECT_IO;
+--
+1.6.4.2
+
+
+
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