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From: Anand Jain <anand.jain@oracle.com>
To: linux-btrfs@vger.kernel.org
Subject: [PATCH 3/6] btrfs: update device_list_mutex protected items
Date: Wed, 30 May 2018 14:58:18 +0800	[thread overview]
Message-ID: <20180530065821.28385-4-anand.jain@oracle.com> (raw)
In-Reply-To: <20180530065821.28385-1-anand.jain@oracle.com>

Include items of fs_uuids::fs_devices to be protected by
device_list_mutex, like (but not limited to) fs_devices::opened,
fs_devices::total_devices and fs_devices::num_devices. This is
been done in the code already.

Signed-off-by: Anand Jain <anand.jain@oracle.com>
---
 fs/btrfs/volumes.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index 0fdb9b717398..e3dd25238eb9 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -164,7 +164,8 @@ static int __btrfs_map_block(struct btrfs_fs_info *fs_info,
  *
  * fs_devices::device_list_mutex (per-fs, with RCU)
  * ------------------------------------------------
- * protects updates to fs_devices::devices, ie. adding and deleting
+ * Protects updates to fs_uuids::fs_devices items, and fs_devices::devices, ie.
+ * adding and deleting.
  *
  * simple list traversal with read-only actions can be done with RCU protection
  *
-- 
2.7.0


  parent reply	other threads:[~2018-05-30  6:55 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-05-30  6:58 [PATCH 0/6] fix device_list_mutex usage and cleanups in device_list_add() Anand Jain
2018-05-30  6:58 ` [PATCH 1/6] btrfs: do btrfs_free_stale_devices() outside of device_list_add() Anand Jain
2018-05-30  6:58 ` [PATCH 2/6] btrfs: fix device_list_add() missing device_list_mutex() Anand Jain
2018-05-30  6:58 ` Anand Jain [this message]
2018-05-30  6:58 ` [PATCH 4/6] btrfs: btrfs_free_stale_devices() rename local variables Anand Jain
2018-05-30  6:58 ` [PATCH 5/6] btrfs: fix btrfs_free_stale_devices() with needed locks Anand Jain
2018-05-30  6:58 ` [PATCH 6/6] btrfs: rename btrfs_free_stale_devices drop btrfs prefix Anand Jain
2018-05-30  7:11   ` Nikolay Borisov

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