From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S936533AbeE2PLl (ORCPT ); Tue, 29 May 2018 11:11:41 -0400 Received: from mail-wm0-f66.google.com ([74.125.82.66]:36027 "EHLO mail-wm0-f66.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S935657AbeE2OoG (ORCPT ); Tue, 29 May 2018 10:44:06 -0400 X-Google-Smtp-Source: ADUXVKIH9tpYZOjJYoOmunUkjsjhdM0R7y2NluoF9HwtbxeBqfy/l3lMUkCnqVR6NTArvseuIApNDg== From: Miklos Szeredi To: linux-unionfs@vger.kernel.org Cc: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 20/39] ovl: add ovl_fallocate() Date: Tue, 29 May 2018 16:43:20 +0200 Message-Id: <20180529144339.16538-21-mszeredi@redhat.com> X-Mailer: git-send-email 2.14.3 In-Reply-To: <20180529144339.16538-1-mszeredi@redhat.com> References: <20180529144339.16538-1-mszeredi@redhat.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 4057bbf2e141..069599d53511 100644 --- a/fs/overlayfs/file.c +++ b/fs/overlayfs/file.c @@ -282,6 +282,29 @@ 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, @@ -290,4 +313,5 @@ const struct file_operations ovl_file_operations = { .write_iter = ovl_write_iter, .fsync = ovl_fsync, .mmap = ovl_mmap, + .fallocate = ovl_fallocate, }; -- 2.14.3