Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754687AbbLIJlA (ORCPT ); Wed, 9 Dec 2015 04:41:00 -0500 Received: from youngberry.canonical.com ([91.189.89.112]:45380 "EHLO youngberry.canonical.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753952AbbLIJk6 (ORCPT ); Wed, 9 Dec 2015 04:40:58 -0500 From: Luis Henriques To: linux-kernel@vger.kernel.org, stable@vger.kernel.org, kernel-team@lists.ubuntu.com Cc: Kinglong Mee , David Howells , Al Viro , Luis Henriques Subject: [PATCH 3.16.y-ckt 082/126] FS-Cache: Increase reference of parent after registering, netfs success Date: Wed, 9 Dec 2015 09:37:32 +0000 Message-Id: <1449653896-5236-83-git-send-email-luis.henriques@canonical.com> In-Reply-To: <1449653896-5236-1-git-send-email-luis.henriques@canonical.com> References: <1449653896-5236-1-git-send-email-luis.henriques@canonical.com> X-Extended-Stable: 3.16 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2190 Lines: 64 3.16.7-ckt21 -stable review patch. If anyone has any objections, please let me know. ------------------ From: Kinglong Mee commit 86108c2e34a26e4bec3c6ddb23390bf8cedcf391 upstream. If netfs exist, fscache should not increase the reference of parent's usage and n_children, otherwise, never be decreased. v2: thanks David's suggest, move increasing reference of parent if success use kmem_cache_free() freeing primary_index directly v3: don't move "netfs->primary_index->parent = &fscache_fsdef_index;" Signed-off-by: Kinglong Mee Signed-off-by: David Howells Signed-off-by: Al Viro Signed-off-by: Luis Henriques --- fs/fscache/netfs.c | 9 ++++----- 1 file changed, 4 insertions(+), 5 deletions(-) diff --git a/fs/fscache/netfs.c b/fs/fscache/netfs.c index 6d941f56faf4..458cc968d9a0 100644 --- a/fs/fscache/netfs.c +++ b/fs/fscache/netfs.c @@ -47,9 +47,6 @@ int __fscache_register_netfs(struct fscache_netfs *netfs) netfs->primary_index->netfs_data = netfs; netfs->primary_index->flags = 1 << FSCACHE_COOKIE_ENABLED; - atomic_inc(&netfs->primary_index->parent->usage); - atomic_inc(&netfs->primary_index->parent->n_children); - spin_lock_init(&netfs->primary_index->lock); INIT_HLIST_HEAD(&netfs->primary_index->backing_objects); @@ -62,6 +59,9 @@ int __fscache_register_netfs(struct fscache_netfs *netfs) goto already_registered; } + atomic_inc(&netfs->primary_index->parent->usage); + atomic_inc(&netfs->primary_index->parent->n_children); + list_add(&netfs->link, &fscache_netfs_list); ret = 0; @@ -71,8 +71,7 @@ already_registered: up_write(&fscache_addremove_sem); if (ret < 0) { - netfs->primary_index->parent = NULL; - __fscache_cookie_put(netfs->primary_index); + kmem_cache_free(fscache_cookie_jar, netfs->primary_index); netfs->primary_index = NULL; } -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/