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recovery: support for CLAIM_DELEGATE_PREV, DELEGPURGE

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10.2.1. Delegation Recovery (re: client restart/lease expiration)
A server MAY support claim types of CLAIM_DELEGATE_PREV and CLAIM_DELEG_PREV_FH, and if it does, it MUST NOT remove delegations upon a CREATE_SESSION that confirm a client ID created by EXCHANGE_ID.  Instead, the server MUST, for a period of time no less than that of the value of the lease_time attribute, maintain the client's delegations to allow time for the client to send CLAIM_DELEGATE_PREV and/or CLAIM_DELEG_PREV_FH requests.  The server that supports CLAIM_DELEGATE_PREV and/or CLAIM_DELEG_PREV_FH MUST support the DELEGPURGE operation.

if there's a delegation to reclaim, recover_open_no_grace() now tries CLAIM_DELEGATE_PREV (supported by emc server, but not linux) before falling back to CLAIM_NULL
nfs41_client_delegation_recovery() sends DELEGPURGE to indicate that we're finished reclaiming delegations

Signed-off-by: Casey Bodley <cbodley@citi.umich.edu>
This commit is contained in:
Casey Bodley 2011-07-20 13:46:36 -04:00 • committed by unknown
parent 8e310c5711
commit b9b3b00e76
5 changed files with 96 additions and 4 deletions
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9
daemon/nfs41_ops.h
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@ -373,6 +373,12 @@ typedef struct __nfs41_create_res {
} nfs41_create_res;
/* OP_DELEGPURGE */
typedef struct __nfs41_delegpurge_res {
uint32_t status;
} nfs41_delegpurge_res;
/* OP_DELEGRETURN */
typedef struct __nfs41_delegreturn_args {
stateid_arg *stateid;
@ -1152,6 +1158,9 @@ int nfs41_access(
OUT uint32_t *supported OPTIONAL,
OUT uint32_t *access OPTIONAL);
int nfs41_delegpurge(
IN nfs41_session *session);
int nfs41_delegreturn(
IN nfs41_session *session,
IN nfs41_path_fh *file,