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nfsd: Fix races between nfsd4_cb_release() and nfsd4_shutdown_callback()

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When we're destroying the client lease, and we call
nfsd4_shutdown_callback(), we must ensure that we do not return
before all outstanding callbacks have terminated and have
released their payloads.

Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
This commit is contained in:
Trond Myklebust
2019-10-23 17:43:18 -04:00
committed by J. Bruce Fields
parent 12357f1b2c
commit 2bbfed98a4
2 changed files with 59 additions and 9 deletions
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fs/nfsd/state.h
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@@ -367,6 +367,7 @@ struct nfs4_client {
struct net *net;
struct list_head async_copies; /* list of async copies */
spinlock_t async_lock; /* lock for async copies */
atomic_t cl_cb_inflight; /* Outstanding callbacks */
};
/* struct nfs4_client_reset