From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1762760AbdEVWxh (ORCPT ); Mon, 22 May 2017 18:53:37 -0400 Received: from mx0b-00082601.pphosted.com ([67.231.153.30]:39096 "EHLO mx0b-00082601.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1762719AbdEVWxN (ORCPT ); Mon, 22 May 2017 18:53:13 -0400 Smtp-Origin-Hostprefix: devbig From: Shaohua Li Smtp-Origin-Hostname: devbig638.prn2.facebook.com To: CC: , , , Smtp-Origin-Cluster: prn2c22 Subject: [PATCH 1/5] kernfs: implement i_generation Date: Mon, 22 May 2017 15:53:05 -0700 Message-ID: <1840aeeff2e745d223b01514a433b4b7f20040a6.1495490800.git.shli@fb.com> X-Mailer: git-send-email 2.9.3 In-Reply-To: References: X-FB-Internal: Safe MIME-Version: 1.0 Content-Type: text/plain X-Proofpoint-Spam-Reason: safe X-FB-Internal: Safe X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:,, definitions=2017-05-22_11:,, signatures=0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Set i_generation for kernfs inod. This is required to implement exportfs operations. Signed-off-by: Shaohua Li --- fs/kernfs/dir.c | 2 ++ fs/kernfs/inode.c | 1 + include/linux/kernfs.h | 2 ++ 3 files changed, 5 insertions(+) diff --git a/fs/kernfs/dir.c b/fs/kernfs/dir.c index db5900aaa..09d093e 100644 --- a/fs/kernfs/dir.c +++ b/fs/kernfs/dir.c @@ -634,6 +634,7 @@ static struct kernfs_node *__kernfs_new_node(struct kernfs_root *root, if (ret < 0) goto err_out2; kn->ino = ret; + kn->generation = atomic_inc_return(&root->next_generation); atomic_set(&kn->count, 1); atomic_set(&kn->active, KN_DEACTIVATED_BIAS); @@ -877,6 +878,7 @@ struct kernfs_root *kernfs_create_root(struct kernfs_syscall_ops *scops, ida_init(&root->ino_ida); INIT_LIST_HEAD(&root->supers); + atomic_set(&root->next_generation, 0); kn = __kernfs_new_node(root, "", S_IFDIR | S_IRUGO | S_IXUGO, KERNFS_DIR); diff --git a/fs/kernfs/inode.c b/fs/kernfs/inode.c index fb4b4a7..79cdae4 100644 --- a/fs/kernfs/inode.c +++ b/fs/kernfs/inode.c @@ -220,6 +220,7 @@ static void kernfs_init_inode(struct kernfs_node *kn, struct inode *inode) inode->i_private = kn; inode->i_mapping->a_ops = &kernfs_aops; inode->i_op = &kernfs_iops; + inode->i_generation = kn->generation; set_default_inode_attr(inode, kn->mode); kernfs_refresh_inode(kn, inode); diff --git a/include/linux/kernfs.h b/include/linux/kernfs.h index a9b11b8..c5f0fa7 100644 --- a/include/linux/kernfs.h +++ b/include/linux/kernfs.h @@ -135,6 +135,7 @@ struct kernfs_node { umode_t mode; unsigned int ino; struct kernfs_iattrs *iattr; + u32 generation; }; /* @@ -170,6 +171,7 @@ struct kernfs_root { struct list_head supers; wait_queue_head_t deactivate_waitq; + atomic_t next_generation; }; struct kernfs_open_file { -- 2.9.3