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NFSv4.1: Deal with server reboots during delegation expiration recovery

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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 <trond.myklebust@primarydata.com>
Tested-by: Oleg Drokin <green@linuxhacker.ru>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
This commit is contained in:
Trond Myklebust 2016-09-22 13:39:00 -04:00 committed by Anna Schumaker
parent 45870d6909
commit bb3d1a3b24
1 changed files with 26 additions and 0 deletions
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26
fs/nfs/delegation.c
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@ -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;