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pnfs/blocklayout: serialize GETDEVICEINFO calls

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The rpc_pipefs code isn't thread safe, leading to occasional use after
frees when running xfstests generic/241 (dbench).

Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: http://lkml.kernel.org/r/1411740170-18611-2-git-send-email-hch@lst.de
Cc: stable@vger.kernel.org # 3.17.x
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
This commit is contained in:
Christoph Hellwig
2014-09-26 16:02:50 +02:00
committed by Trond Myklebust
parent 8c393f9a72
commit e0d4ed71ca
2 changed files with 10 additions and 5 deletions
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fs/nfs/netns.h
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@@ -19,6 +19,7 @@ struct nfs_net {
struct rpc_pipe *bl_device_pipe;
struct bl_dev_msg bl_mount_reply;
wait_queue_head_t bl_wq;
struct mutex bl_mutex;
struct list_head nfs_client_list;
struct list_head nfs_volume_list;
#if IS_ENABLED(CONFIG_NFS_V4)