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NFSv4.1: Various fixes to the sequence flag error handling

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Ensure that we change the EXCHANGE_ID verifier (i.e. clp->cl_boot_time)
when we want to reset all state. This is mainly needed when the server
tells us that it is revoking our open or lock stateids.

Handle revoking of recallable state by expiring the delegations.

Handle callback path issues by expiring the delegations and then resetting
the session.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Trond Myklebust 2010-03-02 13:06:21 -05:00
parent 0851de0617
commit 0f79fd6f5c
1 changed files with 45 additions and 12 deletions
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57
fs/nfs/nfs4state.c
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@ -1255,26 +1255,59 @@ void nfs41_handle_recall_slot(struct nfs_client *clp)
nfs4_schedule_state_recovery(clp);
}
static void nfs4_reset_all_state(struct nfs_client *clp)
{
if (test_and_set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) == 0) {
clp->cl_boot_time = CURRENT_TIME;
nfs4_state_start_reclaim_nograce(clp);
nfs4_schedule_state_recovery(clp);
}
}
static void nfs41_handle_server_reboot(struct nfs_client *clp)
{
if (test_and_set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) == 0) {
nfs4_state_start_reclaim_reboot(clp);
nfs4_schedule_state_recovery(clp);
}
}
static void nfs41_handle_state_revoked(struct nfs_client *clp)
{
/* Temporary */
nfs4_reset_all_state(clp);
}
static void nfs41_handle_recallable_state_revoked(struct nfs_client *clp)
{
/* This will need to handle layouts too */
nfs_expire_all_delegations(clp);
}
static void nfs41_handle_cb_path_down(struct nfs_client *clp)
{
nfs_expire_all_delegations(clp);
if (test_and_set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state) == 0)
nfs4_schedule_state_recovery(clp);
}
void nfs41_handle_sequence_flag_errors(struct nfs_client *clp, u32 flags)
{
if (!flags)
return;
else if (flags & SEQ4_STATUS_RESTART_RECLAIM_NEEDED) {
set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state);
nfs4_state_start_reclaim_reboot(clp);
nfs4_schedule_state_recovery(clp);
} else if (flags & (SEQ4_STATUS_EXPIRED_ALL_STATE_REVOKED |
else if (flags & SEQ4_STATUS_RESTART_RECLAIM_NEEDED)
nfs41_handle_server_reboot(clp);
else if (flags & (SEQ4_STATUS_EXPIRED_ALL_STATE_REVOKED |
SEQ4_STATUS_EXPIRED_SOME_STATE_REVOKED |
SEQ4_STATUS_ADMIN_STATE_REVOKED |
SEQ4_STATUS_RECALLABLE_STATE_REVOKED |
SEQ4_STATUS_LEASE_MOVED)) {
set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state);
nfs4_state_start_reclaim_nograce(clp);
nfs4_schedule_state_recovery(clp);
} else if (flags & (SEQ4_STATUS_CB_PATH_DOWN |
SEQ4_STATUS_LEASE_MOVED))
nfs41_handle_state_revoked(clp);
else if (flags & SEQ4_STATUS_RECALLABLE_STATE_REVOKED)
nfs41_handle_recallable_state_revoked(clp);
else if (flags & (SEQ4_STATUS_CB_PATH_DOWN |
SEQ4_STATUS_BACKCHANNEL_FAULT |
SEQ4_STATUS_CB_PATH_DOWN_SESSION))
nfs_expire_all_delegations(clp);
nfs41_handle_cb_path_down(clp);
}
static int nfs4_reset_session(struct nfs_client *clp)