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recovery: handle state revocation flags in SEQUENCE response

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if any of (SEQ4_STATUS_EXPIRED_ALL_STATE_REVOKED | SEQ4_STATUS_EXPIRED_SOME_STATE_REVOKED | SEQ4_STATUS_ADMIN_STATE_REVOKED) are set in the session flags returned by SEQUENCE:
* enter client recovery mode
* determine which state was lost with TEST_STATEID (consider all delegations, opens, locks, and layouts)
* send FREE_STATEID for each stateid revoked
* recall all layouts and forget devices (required by 12.7.2: Dealing with Lease Expiration on the Client)
* call recover_delegation(), recover_open() or recover_locks() to reclaim each lock

Signed-off-by: Casey Bodley <cbodley@citi.umich.edu>
This commit is contained in:
Casey Bodley 2011-10-14 12:25:04 -04:00 • committed by unknown
parent ed2ec18d2d
commit 78a0bb0ac5
3 changed files with 195 additions and 17 deletions
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14
daemon/nfs41_compound.c
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@ -190,6 +190,20 @@ retry:
status = nfs41_session_bump_seq(session, args->sa_slotid);
if (status)
goto out_free_slot;
if (try_recovery) {
/* check status flags for state revocation */
uint32_t revoked = seq->sr_resok4.sr_status_flags &
(SEQ4_STATUS_EXPIRED_ALL_STATE_REVOKED
| SEQ4_STATUS_EXPIRED_SOME_STATE_REVOKED
| SEQ4_STATUS_ADMIN_STATE_REVOKED);
if (revoked && nfs41_recovery_start_or_wait(session->client)) {
/* free stateids and attempt to recover them */
nfs41_client_state_revoked(session, session->client, revoked);
nfs41_recovery_finish(session->client);
}
}
}
}