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reactos/base/services/nfsd/recovery.c

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/* NFSv4.1 client for Windows
* Copyright © 2012 The Regents of the University of Michigan
*
* Olga Kornievskaia <aglo@umich.edu>
* Casey Bodley <cbodley@umich.edu>
*
* This library is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 of the License, or (at
* your option) any later version.
*
* This library is distributed in the hope that it will be useful, but
* without any warranty; without even the implied warranty of merchantability
* or fitness for a particular purpose. See the GNU Lesser General Public
* License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this library; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA
*/
#include <time.h>
#include "recovery.h"
#include "delegation.h"
#include "nfs41_callback.h"
#include "nfs41_compound.h"
#include "nfs41_ops.h"
#include "daemon_debug.h"
/* session/client recovery uses a lock and condition variable in nfs41_client
* to prevent multiple threads from attempting to recover at the same time */
bool_t nfs41_recovery_start_or_wait(
IN nfs41_client *client)
{
bool_t status = TRUE;
EnterCriticalSection(&client->recovery.lock);
if (!client->recovery.in_recovery) {
dprintf(1, "Entering recovery mode for client %llu\n", client->clnt_id);
client->recovery.in_recovery = TRUE;
} else {
status = FALSE;
dprintf(1, "Waiting for recovery of client %llu\n", client->clnt_id);
while (client->recovery.in_recovery)
SleepConditionVariableCS(&client->recovery.cond,
&client->recovery.lock, INFINITE);
dprintf(1, "Woke up after recovery of client %llu\n", client->clnt_id);
}
LeaveCriticalSection(&client->recovery.lock);
return status;
}
void nfs41_recovery_finish(
IN nfs41_client *client)
{
EnterCriticalSection(&client->recovery.lock);
dprintf(1, "Finished recovery for client %llu\n", client->clnt_id);
client->recovery.in_recovery = FALSE;
WakeAllConditionVariable(&client->recovery.cond);
LeaveCriticalSection(&client->recovery.lock);
}
/* session/client/state recovery */
int nfs41_recover_session(
IN nfs41_session *session,
IN bool_t client_state_lost)
{
enum nfsstat4 status = NFS4_OK;
restart_recovery:
/* recover the session */
status = nfs41_session_renew(session);
if (status == NFS4ERR_STALE_CLIENTID) {
/* recover the client */
client_state_lost = TRUE;
status = nfs41_client_renew(session->client);
if (status == NFS4_OK)
goto restart_recovery; /* resume session recovery */
eprintf("nfs41_client_renew() failed with %d\n", status);
} else if (status) {
eprintf("nfs41_session_renew() failed with %d\n", status);
} else if (client_state_lost) {
/* recover the client's state */
status = nfs41_recover_client_state(session, session->client);
if (status == NFS4ERR_BADSESSION)
goto restart_recovery;
}
return status;
}
void nfs41_recover_sequence_flags(
IN nfs41_session *session,
IN uint32_t flags)
{
const uint32_t revoked = flags &
(SEQ4_STATUS_EXPIRED_ALL_STATE_REVOKED
| SEQ4_STATUS_EXPIRED_SOME_STATE_REVOKED
| SEQ4_STATUS_ADMIN_STATE_REVOKED
| SEQ4_STATUS_RECALLABLE_STATE_REVOKED);
const uint32_t restarted = flags &
SEQ4_STATUS_RESTART_RECLAIM_NEEDED;
/* no state recovery needed */
if (revoked == 0 && restarted == 0)
return;
if (!nfs41_recovery_start_or_wait(session->client))
return;
if (revoked) {
/* free stateids and attempt to recover them */
nfs41_client_state_revoked(session, session->client, revoked);
/* if RESTART_RECLAIM_NEEDED is also set, just do RECLAIM_COMPLETE */
if (restarted) nfs41_reclaim_complete(session);
} else if (restarted) {
/* do server reboot state recovery */
uint32_t status = nfs41_recover_client_state(session, session->client);
if (status == NFS4ERR_BADSESSION) {
/* recover the session and finish state recovery */
nfs41_recover_session(session, TRUE);
}
}
nfs41_recovery_finish(session->client);
}
/* client state recovery for server reboot or lease expiration */
static int recover_open_grace(
IN nfs41_session *session,
IN nfs41_path_fh *parent,
IN nfs41_path_fh *file,
IN state_owner4 *owner,
IN uint32_t access,
IN uint32_t deny,
OUT stateid4 *stateid,
OUT open_delegation4 *delegation)
{
/* reclaim the open stateid with CLAIM_PREVIOUS */
open_claim4 claim;
claim.claim = CLAIM_PREVIOUS;
claim.u.prev.delegate_type = delegation->type;
return nfs41_open(session, parent, file, owner, &claim, access, deny,
OPEN4_NOCREATE, 0, NULL, FALSE, stateid, delegation, NULL);
}
static int recover_open_no_grace(
IN nfs41_session *session,
IN nfs41_path_fh *parent,
IN nfs41_path_fh *file,
IN state_owner4 *owner,
IN uint32_t access,
IN uint32_t deny,
OUT stateid4 *stateid,
OUT open_delegation4 *delegation)
{
open_claim4 claim;
int status;
if (delegation->type != OPEN_DELEGATE_NONE) {
/* attempt out-of-grace recovery with CLAIM_DELEGATE_PREV */
claim.claim = CLAIM_DELEGATE_PREV;
claim.u.deleg_prev.filename = &file->name;
status = nfs41_open(session, parent, file, owner,
&claim, access, deny, OPEN4_NOCREATE, 0, NULL, FALSE,
stateid, delegation, NULL);
if (status == NFS4_OK || status == NFS4ERR_BADSESSION)
goto out;
/* server support for CLAIM_DELEGATE_PREV is optional;
* fall back to CLAIM_NULL on errors */
}
/* attempt out-of-grace recovery with CLAIM_NULL */
claim.claim = CLAIM_NULL;
claim.u.null.filename = &file->name;
/* ask nicely for the delegation we had */
if (delegation->type == OPEN_DELEGATE_READ)
access |= OPEN4_SHARE_ACCESS_WANT_READ_DELEG;
else if (delegation->type == OPEN_DELEGATE_WRITE)
access |= OPEN4_SHARE_ACCESS_WANT_WRITE_DELEG;
status = nfs41_open(session, parent, file, owner,
&claim, access, deny, OPEN4_NOCREATE, 0, NULL, FALSE,
stateid, delegation, NULL);
out:
return status;
}
static int recover_open(
IN nfs41_session *session,
IN nfs41_open_state *open,
IN OUT bool_t *grace)
{
open_delegation4 delegation = { 0 };
stateid4 stateid = { 0 };
int status = NFS4ERR_BADHANDLE;
/* check for an associated delegation */
AcquireSRWLockExclusive(&open->lock);
if (open->delegation.state) {
nfs41_delegation_state *deleg = open->delegation.state;
if (deleg->revoked) {
/* reclaim the delegation along with the open */
AcquireSRWLockShared(&deleg->lock);
delegation.type = deleg->state.type;
ReleaseSRWLockShared(&deleg->lock);
} else if (deleg->state.recalled) {
/* we'll need an open stateid regardless */
} else if (list_empty(&open->locks.list)) {
/* if there are locks, we need an open stateid to
* reclaim them; otherwise, the open can be delegated */
open->do_close = FALSE;
status = NFS4_OK;
}
}
ReleaseSRWLockExclusive(&open->lock);
if (status == NFS4_OK) /* use existing delegation */
goto out;
if (*grace) {
status = recover_open_grace(session, &open->parent, &open->file,
&open->owner, open->share_access, open->share_deny,
&stateid, &delegation);
if (status == NFS4ERR_NO_GRACE) {
*grace = FALSE;
/* send RECLAIM_COMPLETE before any out-of-grace recovery */
nfs41_reclaim_complete(session);
}
}
if (!*grace) {
status = recover_open_no_grace(session, &open->parent, &open->file,
&open->owner, open->share_access, open->share_deny,
&stateid, &delegation);
}
if (status)
goto out;
AcquireSRWLockExclusive(&open->lock);
/* update the open stateid */
memcpy(&open->stateid, &stateid, sizeof(stateid4));
open->do_close = TRUE;
if (open->delegation.state) {
nfs41_delegation_state *deleg = open->delegation.state;
if (deleg->revoked) {
/* update delegation state */
AcquireSRWLockExclusive(&deleg->lock);
if (delegation.type != OPEN_DELEGATE_READ &&
delegation.type != OPEN_DELEGATE_WRITE) {
eprintf("recover_open() got delegation type %u, "
"expected %u\n", delegation.type, deleg->state.type);
} else {
memcpy(&deleg->state, &delegation, sizeof(open_delegation4));
deleg->revoked = FALSE;
}
ReleaseSRWLockExclusive(&deleg->lock);
}
} else /* granted a new delegation? */
nfs41_delegation_granted(session, &open->parent, &open->file,
&delegation, FALSE, &open->delegation.state);
ReleaseSRWLockExclusive(&open->lock);
out:
return status;
}
static int recover_locks(
IN nfs41_session *session,
IN nfs41_open_state *open,
IN OUT bool_t *grace)
{
stateid_arg stateid;
struct list_entry *entry;
nfs41_lock_state *lock;
int status = NFS4_OK;
AcquireSRWLockExclusive(&open->lock);
/* initialize the open stateid for the first lock request */
memcpy(&stateid.stateid, &open->stateid, sizeof(stateid4));
stateid.type = STATEID_OPEN;
stateid.open = open;
stateid.delegation = NULL;
/* recover any locks for this open */
list_for_each(entry, &open->locks.list) {
lock = list_container(entry, nfs41_lock_state, open_entry);
if (lock->delegated)
continue;
if (*grace) {
status = nfs41_lock(session, &open->file, &open->owner,
lock->exclusive ? WRITE_LT : READ_LT, lock->offset,
lock->length, TRUE, FALSE, &stateid);
if (status == NFS4ERR_NO_GRACE) {
*grace = FALSE;
/* send RECLAIM_COMPLETE before any out-of-grace recovery */
nfs41_reclaim_complete(session);
}
}
if (!*grace) {
/* attempt out-of-grace recovery with a normal LOCK */
status = nfs41_lock(session, &open->file, &open->owner,
lock->exclusive ? WRITE_LT : READ_LT, lock->offset,
lock->length, FALSE, FALSE, &stateid);
}
if (status == NFS4ERR_BADSESSION)
break;
}
if (status != NFS4ERR_BADSESSION) {
/* if we got a lock stateid back, save the lock with the open */
if (stateid.type == STATEID_LOCK)
memcpy(&open->locks.stateid, &stateid.stateid, sizeof(stateid4));
else
open->locks.stateid.seqid = 0;
}
ReleaseSRWLockExclusive(&open->lock);
return status;
}
/* delegation recovery via WANT_DELEGATION */
static int recover_delegation_want(
IN nfs41_session *session,
IN nfs41_delegation_state *deleg,
IN OUT bool_t *grace)
{
deleg_claim4 claim;
open_delegation4 delegation = { 0 };
uint32_t want_flags = 0;
int status = NFS4_OK;
AcquireSRWLockShared(&deleg->lock);
delegation.type = deleg->state.type;
ReleaseSRWLockShared(&deleg->lock);
if (delegation.type == OPEN_DELEGATE_READ)
want_flags |= OPEN4_SHARE_ACCESS_WANT_READ_DELEG;
else
want_flags |= OPEN4_SHARE_ACCESS_WANT_WRITE_DELEG;
if (*grace) {
/* recover the delegation with WANT_DELEGATION/CLAIM_PREVIOUS */
claim.claim = CLAIM_PREVIOUS;
claim.prev_delegate_type = delegation.type;
status = nfs41_want_delegation(session, &deleg->file, &claim,
want_flags, FALSE, &delegation);
if (status == NFS4ERR_NO_GRACE) {
*grace = FALSE;
/* send RECLAIM_COMPLETE before any out-of-grace recovery */
nfs41_reclaim_complete(session);
}
}
if (!*grace) {
/* attempt out-of-grace recovery with with CLAIM_DELEG_PREV_FH */
claim.claim = CLAIM_DELEG_PREV_FH;
status = nfs41_want_delegation(session, &deleg->file, &claim,
want_flags, FALSE, &delegation);
}
if (status)
goto out;
/* update delegation state */
AcquireSRWLockExclusive(&deleg->lock);
if (delegation.type != OPEN_DELEGATE_READ &&
delegation.type != OPEN_DELEGATE_WRITE) {
eprintf("recover_delegation_want() got delegation type %u, "
"expected %u\n", delegation.type, deleg->state.type);
} else {
memcpy(&deleg->state, &delegation, sizeof(open_delegation4));
deleg->revoked = FALSE;
}
ReleaseSRWLockExclusive(&deleg->lock);
out:
return status;
}
/* delegation recovery via OPEN (requires corresponding CLOSE) */
static int recover_delegation_open(
IN nfs41_session *session,
IN nfs41_delegation_state *deleg,
IN OUT bool_t *grace)
{
state_owner4 owner;
open_delegation4 delegation = { 0 };
stateid_arg stateid;
uint32_t access = OPEN4_SHARE_ACCESS_READ;
uint32_t deny = OPEN4_SHARE_DENY_NONE;
int status = NFS4_OK;
/* choose the desired access mode based on delegation type */
AcquireSRWLockShared(&deleg->lock);
delegation.type = deleg->state.type;
if (delegation.type == OPEN_DELEGATE_WRITE)
access |= OPEN4_SHARE_ACCESS_WRITE | OPEN4_SHARE_ACCESS_WANT_WRITE_DELEG;
else
access |= OPEN4_SHARE_ACCESS_WANT_READ_DELEG;
ReleaseSRWLockShared(&deleg->lock);
/* construct a temporary open owner by concatenating the time
* in seconds with the delegation pointer */
time((time_t*)owner.owner);
memcpy(owner.owner + sizeof(time_t), deleg, sizeof(deleg));
owner.owner_len = sizeof(time_t) + sizeof(deleg);
if (*grace) {
status = recover_open_grace(session, &deleg->parent, &deleg->file,
&owner, access, deny, &stateid.stateid, &delegation);
if (status == NFS4ERR_NO_GRACE) {
*grace = FALSE;
/* send RECLAIM_COMPLETE before any out-of-grace recovery */
nfs41_reclaim_complete(session);
}
}
if (!*grace) {
status = recover_open_no_grace(session, &deleg->parent, &deleg->file,
&owner, access, deny, &stateid.stateid, &delegation);
}
if (status)
goto out;
/* update delegation state */
AcquireSRWLockExclusive(&deleg->lock);
if (delegation.type != OPEN_DELEGATE_READ &&
delegation.type != OPEN_DELEGATE_WRITE) {
eprintf("recover_delegation_open() got delegation type %u, "
"expected %u\n", delegation.type, deleg->state.type);
} else {
memcpy(&deleg->state, &delegation, sizeof(open_delegation4));
deleg->revoked = FALSE;
}
ReleaseSRWLockExclusive(&deleg->lock);
/* send CLOSE to free the open stateid */
stateid.open = NULL;
stateid.delegation = NULL;
stateid.type = STATEID_OPEN;
nfs41_close(session, &deleg->file, &stateid);
out:
return status;
}
static int recover_delegation(
IN nfs41_session *session,
IN nfs41_delegation_state *deleg,
IN OUT bool_t *grace,
IN OUT bool_t *want_supported)
{
int status;
/* 10.2.1. Delegation Recovery
* When a client needs to reclaim a delegation and there is no
* associated open, the client may use the CLAIM_PREVIOUS variant
* of the WANT_DELEGATION operation. However, since the server is
* not required to support this operation, an alternative is to
* reclaim via a dummy OPEN together with the delegation using an
* OPEN of type CLAIM_PREVIOUS. */
if (*want_supported)
status = recover_delegation_want(session, deleg, grace);
else
status = NFS4ERR_NOTSUPP;
if (status == NFS4ERR_NOTSUPP) {
*want_supported = FALSE;
status = recover_delegation_open(session, deleg, grace);
}
return status;
}
int nfs41_recover_client_state(
IN nfs41_session *session,
IN nfs41_client *client)
{
const struct cb_layoutrecall_args recall = { PNFS_LAYOUTTYPE_FILE,
PNFS_IOMODE_ANY, TRUE, { PNFS_RETURN_ALL } };
struct client_state *state = &session->client->state;
struct list_entry *entry;
nfs41_open_state *open;
nfs41_delegation_state *deleg;
bool_t grace = TRUE;
bool_t want_supported = TRUE;
int status = NFS4_OK;
EnterCriticalSection(&state->lock);
/* flag all delegations as revoked until successful recovery;
* recover_open() and recover_delegation_open() will only ask
* for delegations when revoked = TRUE */
list_for_each(entry, &state->delegations) {
deleg = list_container(entry, nfs41_delegation_state, client_entry);
deleg->revoked = TRUE;
}
/* recover each of the client's opens and associated delegations */
list_for_each(entry, &state->opens) {
open = list_container(entry, nfs41_open_state, client_entry);
status = recover_open(session, open, &grace);
if (status == NFS4_OK)
status = recover_locks(session, open, &grace);
if (status == NFS4ERR_BADSESSION)
goto unlock;
}
/* recover delegations that weren't associated with any opens */
list_for_each(entry, &state->delegations) {
deleg = list_container(entry, nfs41_delegation_state, client_entry);
if (deleg->revoked) {
status = recover_delegation(session,
deleg, &grace, &want_supported);
if (status == NFS4ERR_BADSESSION)
goto unlock;
}
}
/* return any delegations that were reclaimed as 'recalled' */
status = nfs41_client_delegation_recovery(client);
unlock:
LeaveCriticalSection(&state->lock);
/* revoke all of the client's layouts */
pnfs_file_layout_recall(client, &recall);
if (grace && status != NFS4ERR_BADSESSION) {
/* send reclaim_complete, but don't fail on errors */
nfs41_reclaim_complete(session);
}
return status;
}
static uint32_t stateid_array(
IN struct list_entry *delegations,
IN struct list_entry *opens,
OUT stateid_arg **stateids_out,
OUT uint32_t **statuses_out)
{
struct list_entry *entry;
nfs41_open_state *open;
nfs41_delegation_state *deleg;
stateid_arg *stateids = NULL;
uint32_t *statuses = NULL;
uint32_t i = 0, count = 0;
/* count how many stateids the client needs to test */
list_for_each(entry, delegations)
count++;
list_for_each(entry, opens)
count += 3; /* open and potentially lock and layout */
if (count == 0)
goto out;
/* allocate the stateid and status arrays */
stateids = calloc(count, sizeof(stateid_arg));
if (stateids == NULL)
goto out_err;
statuses = calloc(count, sizeof(uint32_t));
if (statuses == NULL)
goto out_err;
memset(statuses, NFS4ERR_BAD_STATEID, count * sizeof(uint32_t));
/* copy stateids into the array */
list_for_each(entry, delegations) {
deleg = list_container(entry, nfs41_delegation_state, client_entry);
AcquireSRWLockShared(&deleg->lock);
/* delegation stateid */
memcpy(&stateids[i].stateid, &deleg->state.stateid, sizeof(stateid4));
stateids[i].type = STATEID_DELEG_FILE;
stateids[i].delegation = deleg;
i++;
ReleaseSRWLockShared(&deleg->lock);
}
list_for_each(entry, opens) {
open = list_container(entry, nfs41_open_state, client_entry);
AcquireSRWLockShared(&open->lock);
/* open stateid */
memcpy(&stateids[i].stateid, &open->stateid, sizeof(stateid4));
stateids[i].type = STATEID_OPEN;
stateids[i].open = open;
i++;
if (open->locks.stateid.seqid) { /* lock stateid? */
memcpy(&stateids[i].stateid, &open->locks.stateid, sizeof(stateid4));
stateids[i].type = STATEID_LOCK;
stateids[i].open = open;
i++;
}
if (open->layout) { /* layout stateid? */
AcquireSRWLockShared(&open->layout->lock);
if (open->layout->stateid.seqid) {
memcpy(&stateids[i].stateid, &open->layout->stateid, sizeof(stateid4));
stateids[i].type = STATEID_LAYOUT;
stateids[i].open = open;
i++;
}
ReleaseSRWLockShared(&open->layout->lock);
}
ReleaseSRWLockShared(&open->lock);
}
count = i;
*stateids_out = stateids;
*statuses_out = statuses;
out:
return count;
out_err:
free(stateids);
free(statuses);
count = 0;
goto out;
}
void nfs41_client_state_revoked(
IN nfs41_session *session,
IN nfs41_client *client,
IN uint32_t revoked)
{
const struct cb_layoutrecall_args recall = { PNFS_LAYOUTTYPE_FILE,
PNFS_IOMODE_ANY, TRUE, { PNFS_RETURN_ALL } };
struct list_entry empty, *opens;
struct client_state *clientstate = &session->client->state;
stateid_arg *stateids = NULL;
uint32_t *statuses = NULL;
uint32_t i, count;
bool_t grace = TRUE;
bool_t want_supported = TRUE;
EnterCriticalSection(&clientstate->lock);
if (revoked == SEQ4_STATUS_RECALLABLE_STATE_REVOKED) {
/* only delegations were revoked. use an empty list for opens */
list_init(&empty);
opens = &empty;
} else {
opens = &clientstate->opens;
}
/* get an array of the client's stateids */
count = stateid_array(&clientstate->delegations,
opens, &stateids, &statuses);
if (count == 0)
goto out;
/* determine which stateids were revoked with TEST_STATEID */
if ((revoked & SEQ4_STATUS_EXPIRED_ALL_STATE_REVOKED) == 0)
nfs41_test_stateid(session, stateids, count, statuses);
/* free all revoked stateids with FREE_STATEID */
for (i = 0; i < count; i++)
if (statuses[i])
nfs41_free_stateid(session, &stateids[i].stateid);
/* revoke all of the client's layouts */
pnfs_file_layout_recall(client, &recall);
/* recover the revoked stateids */
for (i = 0; i < count; i++) {
if (statuses[i]) {
if (stateids[i].type == STATEID_DELEG_FILE)
stateids[i].delegation->revoked = TRUE;
else if (stateids[i].type == STATEID_OPEN)
recover_open(session, stateids[i].open, &grace);
else if (stateids[i].type == STATEID_LOCK)
recover_locks(session, stateids[i].open, &grace);
}
}
for (i = 0; i < count; i++) {
/* delegations that weren't recovered by recover_open() */
if (statuses[i] && stateids[i].type == STATEID_DELEG_FILE
&& stateids[i].delegation->revoked)
recover_delegation(session, stateids[i].delegation,
&grace, &want_supported);
}
nfs41_client_delegation_recovery(client);
out:
LeaveCriticalSection(&clientstate->lock);
free(stateids);
free(statuses);
}
static bool_t recover_stateid_open(
IN nfs_argop4 *argop,
IN stateid_arg *stateid)
{
bool_t retry = FALSE;
if (stateid->open) {
stateid4 *source = &stateid->open->stateid;
/* if the source stateid is different, update and retry */
AcquireSRWLockShared(&stateid->open->lock);
if (memcmp(&stateid->stateid, source, sizeof(stateid4))) {
memcpy(&stateid->stateid, source, sizeof(stateid4));
retry = TRUE;
}
ReleaseSRWLockShared(&stateid->open->lock);
}
return retry;
}
static bool_t recover_stateid_lock(
IN nfs_argop4 *argop,
IN stateid_arg *stateid)
{
bool_t retry = FALSE;
if (stateid->open) {
stateid4 *source = &stateid->open->locks.stateid;
/* if the source stateid is different, update and retry */
AcquireSRWLockShared(&stateid->open->lock);
if (memcmp(&stateid->stateid, source, sizeof(stateid4))) {
if (argop->op == OP_LOCK && source->seqid == 0) {
/* resend LOCK with an open stateid */
nfs41_lock_args *lock = (nfs41_lock_args*)argop->arg;
lock->locker.new_lock_owner = 1;
lock->locker.u.open_owner.open_stateid = stateid;
lock->locker.u.open_owner.lock_owner = &stateid->open->owner;
source = &stateid->open->stateid;
}
memcpy(&stateid->stateid, source, sizeof(stateid4));
retry = TRUE;
}
ReleaseSRWLockShared(&stateid->open->lock);
}
return retry;
}
static bool_t recover_stateid_delegation(
IN nfs_argop4 *argop,
IN stateid_arg *stateid)
{
bool_t retry = FALSE;
if (stateid->open) {
/* if the source stateid is different, update and retry */
AcquireSRWLockShared(&stateid->open->lock);
if (argop->op == OP_OPEN && stateid->open->do_close) {
/* for nfs41_delegation_to_open(); if we've already reclaimed
* an open stateid, just fail this OPEN with BAD_STATEID */
} else if (stateid->open->delegation.state) {
nfs41_delegation_state *deleg = stateid->open->delegation.state;
stateid4 *source = &deleg->state.stateid;
AcquireSRWLockShared(&deleg->lock);
if (memcmp(&stateid->stateid, source, sizeof(stateid4))) {
memcpy(&stateid->stateid, source, sizeof(stateid4));
retry = TRUE;
}
ReleaseSRWLockShared(&deleg->lock);
}
ReleaseSRWLockShared(&stateid->open->lock);
} else if (stateid->delegation) {
nfs41_delegation_state *deleg = stateid->delegation;
stateid4 *source = &deleg->state.stateid;
AcquireSRWLockShared(&deleg->lock);
if (memcmp(&stateid->stateid, source, sizeof(stateid4))) {
memcpy(&stateid->stateid, source, sizeof(stateid4));
retry = TRUE;
}
ReleaseSRWLockShared(&deleg->lock);
}
return retry;
}
bool_t nfs41_recover_stateid(
IN nfs41_session *session,
IN nfs_argop4 *argop)
{
stateid_arg *stateid = NULL;
/* get the stateid_arg from the operation's arguments */
if (argop->op == OP_OPEN) {
nfs41_op_open_args *open = (nfs41_op_open_args*)argop->arg;
if (open->claim->claim == CLAIM_DELEGATE_CUR)
stateid = open->claim->u.deleg_cur.delegate_stateid;
else if (open->claim->claim == CLAIM_DELEG_CUR_FH)
stateid = open->claim->u.deleg_cur_fh.delegate_stateid;
} else if (argop->op == OP_CLOSE) {
nfs41_op_close_args *close = (nfs41_op_close_args*)argop->arg;
stateid = close->stateid;
} else if (argop->op == OP_READ) {
nfs41_read_args *read = (nfs41_read_args*)argop->arg;
stateid = read->stateid;
} else if (argop->op == OP_WRITE) {
nfs41_write_args *write = (nfs41_write_args*)argop->arg;
stateid = write->stateid;
} else if (argop->op == OP_LOCK) {
nfs41_lock_args *lock = (nfs41_lock_args*)argop->arg;
if (lock->locker.new_lock_owner)
stateid = lock->locker.u.open_owner.open_stateid;
else
stateid = lock->locker.u.lock_owner.lock_stateid;
} else if (argop->op == OP_LOCKU) {
nfs41_locku_args *locku = (nfs41_locku_args*)argop->arg;
stateid = locku->lock_stateid;
} else if (argop->op == OP_SETATTR) {
nfs41_setattr_args *setattr = (nfs41_setattr_args*)argop->arg;
stateid = setattr->stateid;
} else if (argop->op == OP_LAYOUTGET) {
pnfs_layoutget_args *lget = (pnfs_layoutget_args*)argop->arg;
stateid = lget->stateid;
} else if (argop->op == OP_DELEGRETURN) {
nfs41_delegreturn_args *dr = (nfs41_delegreturn_args*)argop->arg;
stateid = dr->stateid;
}
if (stateid == NULL)
return FALSE;
/* if there's recovery in progress, wait for it to finish */
EnterCriticalSection(&session->client->recovery.lock);
while (session->client->recovery.in_recovery)
SleepConditionVariableCS(&session->client->recovery.cond,
&session->client->recovery.lock, INFINITE);
LeaveCriticalSection(&session->client->recovery.lock);
switch (stateid->type) {
case STATEID_OPEN:
return recover_stateid_open(argop, stateid);
case STATEID_LOCK:
return recover_stateid_lock(argop, stateid);
case STATEID_DELEG_FILE:
return recover_stateid_delegation(argop, stateid);
default:
eprintf("%s can't recover stateid type %u\n",
nfs_opnum_to_string(argop->op), stateid->type);
break;
}
return FALSE;
}
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