From mboxrd@z Thu Jan 1 00:00:00 1970 From: Miklos Szeredi Subject: [RFC PATCH 15/35] ovl: readd fallocate Date: Thu, 12 Apr 2018 17:08:06 +0200 Message-ID: <20180412150826.20988-16-mszeredi@redhat.com> References: <20180412150826.20988-1-mszeredi@redhat.com> Return-path: In-Reply-To: <20180412150826.20988-1-mszeredi@redhat.com> Sender: linux-kernel-owner@vger.kernel.org To: linux-unionfs@vger.kernel.org Cc: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org List-Id: linux-unionfs@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 f1cc2fdc62c1..05e3e2f80b89 100644 --- a/fs/overlayfs/file.c +++ b/fs/overlayfs/file.c @@ -268,6 +268,29 @@ static int ovl_mmap(struct file *file, struct vm_area_struct *vma) return ret; } +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_file(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, @@ -276,4 +299,5 @@ const struct file_operations ovl_file_operations = { .write_iter = ovl_write_iter, .fsync = ovl_fsync, .mmap = ovl_mmap, + .fallocate = ovl_fallocate, }; -- 2.14.3