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104 lines
4.4 KiB
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104 lines
4.4 KiB
Text
From: Suresh Jayaraman <sjayaraman-l3A5Bk7waGM@public.gmane.org>
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Subject: [RFC][PATCH 10/10] cifs: add mount option to enable local caching
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Date: Tue, 22 Jun 2010 20:55:09 +0530
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Lines: 66
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Message-ID: <1277220309-3757-1-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 17:25:29 2010
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Envelope-to: glkc-linux-cifs-1dZseelyfdZg9hUCZPvPmw@public.gmane.org
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Archived-At: <http://permalink.gmane.org/gmane.linux.kernel/1001750>
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Add a mount option 'fsc' to enable local caching on CIFS.
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As the cifs-utils (userspace) changes are not done yet, this patch enables
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'fsc' by default to assist testing.
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Signed-off-by: Suresh Jayaraman <sjayaraman-l3A5Bk7waGM@public.gmane.org>
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---
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fs/cifs/cifs_fs_sb.h | 1 +
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fs/cifs/connect.c | 8 ++++++++
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2 files changed, 9 insertions(+), 0 deletions(-)
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diff --git a/fs/cifs/cifs_fs_sb.h b/fs/cifs/cifs_fs_sb.h
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index 246a167..9e77145 100644
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--- a/fs/cifs/cifs_fs_sb.h
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+++ b/fs/cifs/cifs_fs_sb.h
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@@ -35,6 +35,7 @@
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#define CIFS_MOUNT_DYNPERM 0x1000 /* allow in-memory only mode setting */
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#define CIFS_MOUNT_NOPOSIXBRL 0x2000 /* mandatory not posix byte range lock */
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#define CIFS_MOUNT_NOSSYNC 0x4000 /* don't do slow SMBflush on every sync*/
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+#define CIFS_MOUNT_FSCACHE 0x8000 /* local caching enabled */
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struct cifs_sb_info {
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struct cifsTconInfo *tcon; /* primary mount */
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diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
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index 4844dbd..6c6ff3c 100644
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--- a/fs/cifs/connect.c
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+++ b/fs/cifs/connect.c
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@@ -98,6 +98,7 @@ struct smb_vol {
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bool noblocksnd:1;
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bool noautotune:1;
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bool nostrictsync:1; /* do not force expensive SMBflush on every sync */
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+ bool fsc:1; /* enable fscache */
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unsigned int rsize;
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unsigned int wsize;
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bool sockopt_tcp_nodelay:1;
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@@ -843,6 +844,9 @@ cifs_parse_mount_options(char *options, const char *devname,
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/* default to using server inode numbers where available */
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vol->server_ino = 1;
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+ /* XXX: default to fsc for testing until mount.cifs pieces are done */
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+ vol->fsc = 1;
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+
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if (!options)
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return 1;
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@@ -1332,6 +1336,8 @@ cifs_parse_mount_options(char *options, const char *devname,
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printk(KERN_WARNING "CIFS: Mount option noac not "
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"supported. Instead set "
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"/proc/fs/cifs/LookupCacheEnabled to 0\n");
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+ } else if (strnicmp(data, "fsc", 3) == 0) {
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+ vol->fsc = true;
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} else
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printk(KERN_WARNING "CIFS: Unknown mount option %s\n",
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data);
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@@ -2405,6 +2411,8 @@ static void setup_cifs_sb(struct smb_vol *pvolume_info,
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cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_GID;
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if (pvolume_info->dynperm)
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cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DYNPERM;
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+ if (pvolume_info->fsc)
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+ cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_FSCACHE;
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if (pvolume_info->direct_io) {
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cFYI(1, "mounting share using direct i/o");
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cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DIRECT_IO;
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--
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1.6.4.2
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