[9p] Introduce client side TFSYNC/RFSYNC for dotl.

SYNOPSIS
    size[4] Tfsync tag[2] fid[4]

    size[4] Rfsync tag[2]

DESCRIPTION

The Tfsync transaction transfers ("flushes") all modified in-core data of
file identified by fid to the disk device (or other  permanent  storage
device)  where that  file  resides.

Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>

1 files changed, 16 insertions, 2 deletions

diff --git a/fs/9p/vfs_file.c b/fs/9p/vfs_file.c
index 28db7fb1d96e..fdf303207c72 100644
--- a/fs/9p/vfs_file.c
+++ b/fs/9p/vfs_file.c
@@ -290,6 +290,20 @@ static int v9fs_file_fsync(struct file *filp, int datasync)
         return retval;
 }
 
+static int v9fs_file_fsync_dotl(struct file *filp, int datasync)
+{
+        struct p9_fid *fid;
+        int retval;
+
+        P9_DPRINTK(P9_DEBUG_VFS, "v9fs_file_fsync_dotl: filp %p datasync %x\n",
+                        filp, datasync);
+
+        fid = filp->private_data;
+
+        retval = p9_client_fsync(fid);
+        return retval;
+}
+
 static const struct file_operations v9fs_cached_file_operations = {
         .llseek = generic_file_llseek,
         .read = do_sync_read,
@@ -311,7 +325,7 @@ static const struct file_operations v9fs_cached_file_operations_dotl = {
         .release = v9fs_dir_release,
         .lock = v9fs_file_lock,
         .mmap = generic_file_readonly_mmap,
-        .fsync = v9fs_file_fsync,
+        .fsync = v9fs_file_fsync_dotl,
 };
 
 const struct file_operations v9fs_file_operations = {
@@ -333,5 +347,5 @@ const struct file_operations v9fs_file_operations_dotl = {
         .release = v9fs_dir_release,
         .lock = v9fs_file_lock,
         .mmap = generic_file_readonly_mmap,
-        .fsync = v9fs_file_fsync,
+        .fsync = v9fs_file_fsync_dotl,
 };