9p: use the updated offset given by generic_write_checks

Without this fix, even if a file is opened in O_APPEND mode, data will be
written at current file position instead of end of file.

Signed-off-by: M. Mohan Kumar <mohan@in.ibm.com>
Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>

1 files changed, 5 insertions, 2 deletions

diff --git a/fs/9p/vfs_file.c b/fs/9p/vfs_file.c
index 6997eb62fbba..ffed55817f0c 100644
--- a/fs/9p/vfs_file.c
+++ b/fs/9p/vfs_file.c
@@ -508,9 +508,12 @@ v9fs_file_write(struct file *filp, const char __user * data,
         if (!count)
                 goto out;
 
-        return v9fs_file_write_internal(filp->f_path.dentry->d_inode,
+        retval = v9fs_file_write_internal(filp->f_path.dentry->d_inode,
                                         filp->private_data,
-                                        data, count, offset, 1);
+                                        data, count, &origin, 1);
+        /* update offset on successful write */
+        if (retval > 0)
+                *offset = origin;
 out:
         return retval;
 }