From bb3d1a3b24b61d8dd87e2d8c127a92ec8dd5d0d4 Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Thu, 22 Sep 2016 13:39:00 -0400 Subject: NFSv4.1: Deal with server reboots during delegation expiration recovery Ensure that if the server reboots while we're testing and recovering from revoked delegations, we exit to allow the state manager to handle matters. Signed-off-by: Trond Myklebust Tested-by: Oleg Drokin Signed-off-by: Anna Schumaker --- fs/nfs/delegation.c | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) (limited to 'fs') diff --git a/fs/nfs/delegation.c b/fs/nfs/delegation.c index dfb300901f7e..0ffead281555 100644 --- a/fs/nfs/delegation.c +++ b/fs/nfs/delegation.c @@ -884,6 +884,13 @@ restart: rcu_read_unlock(); } +static inline bool nfs4_server_rebooted(const struct nfs_client *clp) +{ + return (clp->cl_state & (BIT(NFS4CLNT_CHECK_LEASE) | + BIT(NFS4CLNT_LEASE_EXPIRED) | + BIT(NFS4CLNT_SESSION_RESET))) != 0; +} + static void nfs_mark_test_expired_delegation(struct nfs_server *server, struct nfs_delegation *delegation) { @@ -892,6 +899,19 @@ static void nfs_mark_test_expired_delegation(struct nfs_server *server, set_bit(NFS4CLNT_DELEGATION_EXPIRED, &server->nfs_client->cl_state); } +static void nfs_inode_mark_test_expired_delegation(struct nfs_server *server, + struct inode *inode) +{ + struct nfs_delegation *delegation; + + rcu_read_lock(); + delegation = rcu_dereference(NFS_I(inode)->delegation); + if (delegation) + nfs_mark_test_expired_delegation(server, delegation); + rcu_read_unlock(); + +} + static void nfs_delegation_mark_test_expired_server(struct nfs_server *server) { struct nfs_delegation *delegation; @@ -964,6 +984,12 @@ restart: nfs_inode_find_state_and_recover(inode, &stateid); } put_rpccred(cred); + if (nfs4_server_rebooted(clp)) { + nfs_inode_mark_test_expired_delegation(server,inode); + iput(inode); + nfs_sb_deactive(server->super); + return; + } iput(inode); nfs_sb_deactive(server->super); goto restart; -- cgit v1.2.3