From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from aserp2130.oracle.com ([141.146.126.79]:56598 "EHLO aserp2130.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757414AbeAIONK (ORCPT ); Tue, 9 Jan 2018 09:13:10 -0500 Received: from pps.filterd (aserp2130.oracle.com [127.0.0.1]) by aserp2130.oracle.com (8.16.0.22/8.16.0.22) with SMTP id w09ED5PK144158 for ; Tue, 9 Jan 2018 14:13:10 GMT Received: from userv0021.oracle.com (userv0021.oracle.com [156.151.31.71]) by aserp2130.oracle.com with ESMTP id 2fcpfyt346-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK) for ; Tue, 09 Jan 2018 14:13:07 +0000 Received: from aserv0121.oracle.com (aserv0121.oracle.com [141.146.126.235]) by userv0021.oracle.com (8.14.4/8.14.4) with ESMTP id w09ECZGv017089 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL) for ; Tue, 9 Jan 2018 14:12:36 GMT Received: from abhmp0012.oracle.com (abhmp0012.oracle.com [141.146.116.18]) by aserv0121.oracle.com (8.14.4/8.13.8) with ESMTP id w09ECZ9Q023086 for ; Tue, 9 Jan 2018 14:12:35 GMT From: Anand Jain To: linux-btrfs@vger.kernel.org Subject: [PATCH 6/6] btrfs: cleanup to make btrfs_free_stale_device() readable Date: Tue, 9 Jan 2018 22:13:14 +0800 Message-Id: <20180109141314.23795-7-anand.jain@oracle.com> In-Reply-To: <20180109141314.23795-1-anand.jain@oracle.com> References: <20180109141314.23795-1-anand.jain@oracle.com> Sender: linux-btrfs-owner@vger.kernel.org List-ID: From: Anand Jain Now as the there is path in arg, so instead of reading the path from cur_device just get it from the caller, and so the purpose of cur_device is to skip the device, so rename it to skip_dev. Also drop the comment about different path being used for the same device, since now we will have cli to clean any device that's not a concern any more. Signed-off-by: Anand Jain --- v3: add btrfs_free_stale_device() fn description, as suggested by Nikolay Fix line with longer than 80 char v2: btrfs_device::name is null when we have missing device and unmounted. So we still need to check for dev->name. fs/btrfs/volumes.c | 30 ++++++++++++++++-------------- 1 file changed, 16 insertions(+), 14 deletions(-) diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c index f87d30aa0e18..848824fe98a3 100644 --- a/fs/btrfs/volumes.c +++ b/fs/btrfs/volumes.c @@ -605,8 +605,17 @@ static void pending_bios_fn(struct btrfs_work *work) run_scheduled_bios(device); } - -static void btrfs_free_stale_device(struct btrfs_device *cur_dev, char *path) +/* + * btrfs_free_stale_device() + * Search and remove all stale (devices which are not mounted) devices. + * When both inputs are NULL, it will search and release all stale devices. + * path: Optional. When provided will it release all unmounted devices + * matching this path only. + * skip_dev: Optional. Will skip this device when searching for the stale + * devices. + */ +static void btrfs_free_stale_device(const char *path, + struct btrfs_device *skip_dev) { struct btrfs_fs_devices *fs_devs, *tmp_fs_devs; struct btrfs_device *dev, *tmp_dev; @@ -620,20 +629,13 @@ static void btrfs_free_stale_device(struct btrfs_device *cur_dev, char *path) &fs_devs->devices, dev_list) { int not_found; - if (cur_dev && (cur_dev == dev || !dev->name)) + if (skip_dev && skip_dev == dev) + continue; + if (path && !dev->name) continue; - /* - * Todo: This won't be enough. What if the same device - * comes back (with new uuid and) with its mapper path? - * But for now, this does help as mostly an admin will - * either use mapper or non mapper path throughout. - */ rcu_read_lock(); - if (cur_dev) - not_found = strcmp(rcu_str_deref(dev->name), - rcu_str_deref(cur_dev->name)); - else if (path) + if (path) not_found = strcmp(rcu_str_deref(dev->name), path); else not_found = 0; @@ -778,7 +780,7 @@ static noinline int device_list_add(const char *path, ret = 1; device->fs_devices = fs_devices; - btrfs_free_stale_device(device, NULL); + btrfs_free_stale_device(path, device); } else if (!device->name || strcmp(device->name->str, path)) { /* * When FS is already mounted. -- 2.7.0