提交 9f0f8e12 编写于 作者: T Trond Myklebust

NFSv4: Pin the superblock while we're returning the delegation

This patch ensures that the superblock doesn't go ahead and disappear
underneath us while the state manager thread is returning delegations.
Signed-off-by: NTrond Myklebust <trond.myklebust@primarydata.com>
上级 ade04647
......@@ -474,14 +474,20 @@ int nfs_client_return_marked_delegations(struct nfs_client *clp)
super_list) {
if (!nfs_delegation_need_return(delegation))
continue;
inode = nfs_delegation_grab_inode(delegation);
if (inode == NULL)
if (!nfs_sb_active(server->super))
continue;
inode = nfs_delegation_grab_inode(delegation);
if (inode == NULL) {
rcu_read_unlock();
nfs_sb_deactive(server->super);
goto restart;
}
delegation = nfs_start_delegation_return_locked(NFS_I(inode));
rcu_read_unlock();
err = nfs_end_delegation_return(inode, delegation, 0);
iput(inode);
nfs_sb_deactive(server->super);
if (!err)
goto restart;
set_bit(NFS4CLNT_DELEGRETURN, &clp->cl_state);
......@@ -815,9 +821,14 @@ void nfs_delegation_reap_unclaimed(struct nfs_client *clp)
if (test_bit(NFS_DELEGATION_NEED_RECLAIM,
&delegation->flags) == 0)
continue;
inode = nfs_delegation_grab_inode(delegation);
if (inode == NULL)
if (!nfs_sb_active(server->super))
continue;
inode = nfs_delegation_grab_inode(delegation);
if (inode == NULL) {
rcu_read_unlock();
nfs_sb_deactive(server->super);
goto restart;
}
delegation = nfs_start_delegation_return_locked(NFS_I(inode));
rcu_read_unlock();
if (delegation != NULL) {
......@@ -827,6 +838,7 @@ void nfs_delegation_reap_unclaimed(struct nfs_client *clp)
nfs_free_delegation(delegation);
}
iput(inode);
nfs_sb_deactive(server->super);
goto restart;
}
}
......
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