From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wr0-f196.google.com ([209.85.128.196]:42167 "EHLO mail-wr0-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752154AbeEGIid (ORCPT ); Mon, 7 May 2018 04:38:33 -0400 Received: by mail-wr0-f196.google.com with SMTP id v5-v6so27852106wrf.9 for ; Mon, 07 May 2018 01:38:33 -0700 (PDT) From: Miklos Szeredi To: linux-unionfs@vger.kernel.org Cc: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v2 17/35] ovl: add ovl_fallocate() Date: Mon, 7 May 2018 10:37:49 +0200 Message-Id: <20180507083807.28792-18-mszeredi@redhat.com> In-Reply-To: <20180507083807.28792-1-mszeredi@redhat.com> References: <20180507083807.28792-1-mszeredi@redhat.com> Sender: linux-fsdevel-owner@vger.kernel.org List-ID: Implement stacked fallocate. Signed-off-by: Miklos Szeredi --- fs/overlayfs/file.c | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) diff --git a/fs/overlayfs/file.c b/fs/overlayfs/file.c index b75ee0a3655e..3a85bbfa266a 100644 --- a/fs/overlayfs/file.c +++ b/fs/overlayfs/file.c @@ -279,6 +279,29 @@ static int ovl_mmap(struct file *file, struct vm_area_struct *vma) return ret; } +static long ovl_fallocate(struct file *file, int mode, loff_t offset, loff_t len) +{ + struct inode *inode = file_inode(file); + struct fd real; + const struct cred *old_cred; + int ret; + + ret = ovl_real_fdget(file, &real); + if (ret) + return ret; + + old_cred = ovl_override_creds(file_inode(file)->i_sb); + ret = vfs_fallocate(real.file, mode, offset, len); + revert_creds(old_cred); + + /* Update size */ + ovl_copyattr(ovl_inode_real(inode), inode); + + fdput(real); + + return ret; +} + const struct file_operations ovl_file_operations = { .open = ovl_open, .release = ovl_release, @@ -287,4 +310,5 @@ const struct file_operations ovl_file_operations = { .write_iter = ovl_write_iter, .fsync = ovl_fsync, .mmap = ovl_mmap, + .fallocate = ovl_fallocate, }; -- 2.14.3