static const stateid_t zero_stateid = {
/* all fields zero */
};
+static const stateid_t currentstateid = {
+ .si_generation = 1,
+};
static u64 current_sessionid = 1;
#define ZERO_STATEID(stateid) (!memcmp((stateid), &zero_stateid, sizeof(stateid_t)))
#define ONE_STATEID(stateid) (!memcmp((stateid), &one_stateid, sizeof(stateid_t)))
+#define CURRENT_STATEID(stateid) (!memcmp((stateid), ¤tstateid, sizeof(stateid_t)))
/* forward declarations */
static int check_for_locks(struct nfs4_file *filp, struct nfs4_lockowner *lowner);
mutex_lock(&client_mutex);
}
+static void free_session(struct kref *);
+
+/* Must be called under the client_lock */
+static void nfsd4_put_session_locked(struct nfsd4_session *ses)
+{
+ kref_put(&ses->se_ref, free_session);
+}
+
+static void nfsd4_get_session(struct nfsd4_session *ses)
+{
+ kref_get(&ses->se_ref);
+}
+
void
nfs4_unlock_state(void)
{
return sid->sequence % SESSION_HASH_SIZE;
}
+#ifdef NFSD_DEBUG
static inline void
dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid)
{
u32 *ptr = (u32 *)(&sessionid->data[0]);
dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]);
}
+#else
+static inline void
+dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid)
+{
+}
+#endif
+
static void
gen_sessionid(struct nfsd4_session *ses)
spin_unlock(&clp->cl_lock);
}
-void free_session(struct kref *kref)
+static void free_session(struct kref *kref)
{
struct nfsd4_session *ses;
int mem;
+ BUG_ON(!spin_is_locked(&client_lock));
ses = container_of(kref, struct nfsd4_session, se_ref);
nfsd4_del_conns(ses);
spin_lock(&nfsd_drc_lock);
kfree(ses);
}
+void nfsd4_put_session(struct nfsd4_session *ses)
+{
+ spin_lock(&client_lock);
+ nfsd4_put_session_locked(ses);
+ spin_unlock(&client_lock);
+}
+
static struct nfsd4_session *alloc_init_session(struct svc_rqst *rqstp, struct nfs4_client *clp, struct nfsd4_create_session *cses)
{
struct nfsd4_session *new;
status = nfsd4_new_conn_from_crses(rqstp, new);
/* whoops: benny points out, status is ignored! (err, or bogus) */
if (status) {
+ spin_lock(&client_lock);
free_session(&new->se_ref);
+ spin_unlock(&client_lock);
return NULL;
}
if (cses->flags & SESSION4_BACK_CHAN) {
static inline void
free_client(struct nfs4_client *clp)
{
+ BUG_ON(!spin_is_locked(&client_lock));
while (!list_empty(&clp->cl_sessions)) {
struct nfsd4_session *ses;
ses = list_entry(clp->cl_sessions.next, struct nfsd4_session,
se_perclnt);
list_del(&ses->se_perclnt);
- nfsd4_put_session(ses);
+ nfsd4_put_session_locked(ses);
}
if (clp->cl_cred.cr_group_info)
put_group_info(clp->cl_cred.cr_group_info);
static void gen_confirm(struct nfs4_client *clp)
{
+ __be32 verf[2];
static u32 i;
- u32 *p;
- p = (u32 *)clp->cl_confirm.data;
- *p++ = get_seconds();
- *p++ = i++;
+ verf[0] = (__be32)get_seconds();
+ verf[1] = (__be32)i++;
+ memcpy(clp->cl_confirm.data, verf, sizeof(clp->cl_confirm.data));
}
static struct nfs4_stid *find_stateid(struct nfs4_client *cl, stateid_t *t)
if (princ) {
clp->cl_principal = kstrdup(princ, GFP_KERNEL);
if (clp->cl_principal == NULL) {
+ spin_lock(&client_lock);
free_client(clp);
+ spin_unlock(&client_lock);
return NULL;
}
}
slot->sl_opcnt = resp->opcnt;
slot->sl_status = resp->cstate.status;
+ slot->sl_flags |= NFSD4_SLOT_INITIALIZED;
if (nfsd4_not_cached(resp)) {
slot->sl_datalen = 0;
return;
struct nfsd4_op *op;
struct nfsd4_slot *slot = resp->cstate.slot;
- dprintk("--> %s resp->opcnt %d cachethis %u \n", __func__,
- resp->opcnt, resp->cstate.slot->sl_cachethis);
-
/* Encode the replayed sequence operation */
op = &args->ops[resp->opcnt - 1];
nfsd4_encode_operation(resp, op);
/* Return nfserr_retry_uncached_rep in next operation. */
- if (args->opcnt > 1 && slot->sl_cachethis == 0) {
+ if (args->opcnt > 1 && !(slot->sl_flags & NFSD4_SLOT_CACHETHIS)) {
op = &args->ops[resp->opcnt++];
op->status = nfserr_retry_uncached_rep;
nfsd4_encode_operation(resp, op);
else
return nfserr_seq_misordered;
}
- /* Normal */
+ /* Note unsigned 32-bit arithmetic handles wraparound: */
if (likely(seqid == slot_seqid + 1))
return nfs_ok;
- /* Replay */
if (seqid == slot_seqid)
return nfserr_replay_cache;
- /* Wraparound */
- if (seqid == 1 && (slot_seqid + 1) == 0)
- return nfs_ok;
- /* Misordered replay or misordered new request */
return nfserr_seq_misordered;
}
nfsd4_probe_callback_sync(ses->se_client);
nfs4_unlock_state();
+ spin_lock(&client_lock);
nfsd4_del_conns(ses);
-
- nfsd4_put_session(ses);
+ nfsd4_put_session_locked(ses);
+ spin_unlock(&client_lock);
status = nfs_ok;
out:
dprintk("%s returns %d\n", __func__, ntohl(status));
* sr_highest_slotid and the sr_target_slot id to maxslots */
seq->maxslots = session->se_fchannel.maxreqs;
- status = check_slot_seqid(seq->seqid, slot->sl_seqid, slot->sl_inuse);
+ status = check_slot_seqid(seq->seqid, slot->sl_seqid,
+ slot->sl_flags & NFSD4_SLOT_INUSE);
if (status == nfserr_replay_cache) {
+ status = nfserr_seq_misordered;
+ if (!(slot->sl_flags & NFSD4_SLOT_INITIALIZED))
+ goto out;
cstate->slot = slot;
cstate->session = session;
/* Return the cached reply status and set cstate->status
conn = NULL;
/* Success! bump slot seqid */
- slot->sl_inuse = true;
slot->sl_seqid = seq->seqid;
- slot->sl_cachethis = seq->cachethis;
+ slot->sl_flags |= NFSD4_SLOT_INUSE;
+ if (seq->cachethis)
+ slot->sl_flags |= NFSD4_SLOT_CACHETHIS;
+ else
+ slot->sl_flags &= ~NFSD4_SLOT_CACHETHIS;
cstate->slot = slot;
cstate->session = session;
static int share_access_to_flags(u32 share_access)
{
- share_access &= ~NFS4_SHARE_WANT_MASK;
-
return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE;
}
static void
-nfs4_set_claim_prev(struct nfsd4_open *open)
+nfs4_set_claim_prev(struct nfsd4_open *open, bool has_session)
{
open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
- open->op_openowner->oo_owner.so_client->cl_firststate = 1;
+ /*
+ * On a 4.1+ client, we don't create a state record for a client
+ * until it performs RECLAIM_COMPLETE:
+ */
+ if (!has_session)
+ open->op_openowner->oo_owner.so_client->cl_firststate = 1;
}
/* Should we give out recallable state?: */
return 0;
}
+static void nfsd4_open_deleg_none_ext(struct nfsd4_open *open, int status)
+{
+ open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT;
+ if (status == -EAGAIN)
+ open->op_why_no_deleg = WND4_CONTENTION;
+ else {
+ open->op_why_no_deleg = WND4_RESOURCE;
+ switch (open->op_deleg_want) {
+ case NFS4_SHARE_WANT_READ_DELEG:
+ case NFS4_SHARE_WANT_WRITE_DELEG:
+ case NFS4_SHARE_WANT_ANY_DELEG:
+ break;
+ case NFS4_SHARE_WANT_CANCEL:
+ open->op_why_no_deleg = WND4_CANCELLED;
+ break;
+ case NFS4_SHARE_WANT_NO_DELEG:
+ BUG(); /* not supposed to get here */
+ }
+ }
+}
+
/*
* Attempt to hand out a delegation.
*/
struct nfs4_delegation *dp;
struct nfs4_openowner *oo = container_of(stp->st_stateowner, struct nfs4_openowner, oo_owner);
int cb_up;
- int status, flag = 0;
+ int status = 0, flag = 0;
cb_up = nfsd4_cb_channel_good(oo->oo_owner.so_client);
flag = NFS4_OPEN_DELEGATE_NONE;
dprintk("NFSD: delegation stateid=" STATEID_FMT "\n",
STATEID_VAL(&dp->dl_stid.sc_stateid));
out:
- if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS
- && flag == NFS4_OPEN_DELEGATE_NONE
- && open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE)
- dprintk("NFSD: WARNING: refusing delegation reclaim\n");
open->op_delegate_type = flag;
+ if (flag == NFS4_OPEN_DELEGATE_NONE) {
+ if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS &&
+ open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE)
+ dprintk("NFSD: WARNING: refusing delegation reclaim\n");
+
+ /* 4.1 client asking for a delegation? */
+ if (open->op_deleg_want)
+ nfsd4_open_deleg_none_ext(open, status);
+ }
return;
out_free:
nfs4_put_delegation(dp);
goto out;
}
+static void nfsd4_deleg_xgrade_none_ext(struct nfsd4_open *open,
+ struct nfs4_delegation *dp)
+{
+ if (open->op_deleg_want == NFS4_SHARE_WANT_READ_DELEG &&
+ dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) {
+ open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT;
+ open->op_why_no_deleg = WND4_NOT_SUPP_DOWNGRADE;
+ } else if (open->op_deleg_want == NFS4_SHARE_WANT_WRITE_DELEG &&
+ dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) {
+ open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT;
+ open->op_why_no_deleg = WND4_NOT_SUPP_UPGRADE;
+ }
+ /* Otherwise the client must be confused wanting a delegation
+ * it already has, therefore we don't return
+ * NFS4_OPEN_DELEGATE_NONE_EXT and reason.
+ */
+}
+
/*
* called with nfs4_lock_state() held.
*/
update_stateid(&stp->st_stid.sc_stateid);
memcpy(&open->op_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t));
- if (nfsd4_has_session(&resp->cstate))
+ if (nfsd4_has_session(&resp->cstate)) {
open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
+ if (open->op_deleg_want & NFS4_SHARE_WANT_NO_DELEG) {
+ open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT;
+ open->op_why_no_deleg = WND4_NOT_WANTED;
+ goto nodeleg;
+ }
+ }
+
/*
* Attempt to hand out a delegation. No error return, because the
* OPEN succeeds even if we fail.
*/
nfs4_open_delegation(current_fh, open, stp);
-
+nodeleg:
status = nfs_ok;
dprintk("%s: stateid=" STATEID_FMT "\n", __func__,
STATEID_VAL(&stp->st_stid.sc_stateid));
out:
+ /* 4.1 client trying to upgrade/downgrade delegation? */
+ if (open->op_delegate_type == NFS4_OPEN_DELEGATE_NONE && dp &&
+ open->op_deleg_want)
+ nfsd4_deleg_xgrade_none_ext(open, dp);
+
if (fp)
put_nfs4_file(fp);
if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)
- nfs4_set_claim_prev(open);
+ nfs4_set_claim_prev(open, nfsd4_has_session(&resp->cstate));
/*
* To finish the open response, we just need to set the rflags.
*/
nfsd4_test_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
struct nfsd4_test_stateid *test_stateid)
{
- /* real work is done during encoding */
+ struct nfsd4_test_stateid_id *stateid;
+ struct nfs4_client *cl = cstate->session->se_client;
+
+ nfs4_lock_state();
+ list_for_each_entry(stateid, &test_stateid->ts_stateid_list, ts_id_list)
+ stateid->ts_id_status = nfs4_validate_stateid(cl, &stateid->ts_id_stateid);
+ nfs4_unlock_state();
+
return nfs_ok;
}
cstate->current_fh.fh_dentry->d_name.name);
/* We don't yet support WANT bits: */
- od->od_share_access &= NFS4_SHARE_ACCESS_MASK;
+ if (od->od_deleg_want)
+ dprintk("NFSD: %s: od_deleg_want=0x%x ignored\n", __func__,
+ od->od_deleg_want);
nfs4_lock_state();
status = nfs4_preprocess_confirmed_seqid_op(cstate, od->od_seqid,
struct nfs4_client *clp;
clp = find_confirmed_client_by_str(name, strhashval);
- return clp ? 1 : 0;
+ if (!clp)
+ return 0;
+ return clp->cl_firststate;
}
/*
/* initialization to perform when the nfsd service is started: */
-static int
-__nfs4_state_start(void)
+int
+nfs4_state_start(void)
{
int ret;
+ nfsd4_load_reboot_recovery_data();
boot_time = get_seconds();
locks_start_grace(&nfsd4_manager);
printk(KERN_INFO "NFSD: starting %ld-second grace period\n",
nfsd4_grace);
ret = set_callback_cred();
- if (ret)
- return -ENOMEM;
+ if (ret) {
+ ret = -ENOMEM;
+ goto out_recovery;
+ }
laundry_wq = create_singlethread_workqueue("nfsd4");
- if (laundry_wq == NULL)
- return -ENOMEM;
+ if (laundry_wq == NULL) {
+ ret = -ENOMEM;
+ goto out_recovery;
+ }
ret = nfsd4_create_callback_queue();
if (ret)
goto out_free_laundry;
return 0;
out_free_laundry:
destroy_workqueue(laundry_wq);
+out_recovery:
+ nfs4_release_reclaim();
+ nfsd4_shutdown_recdir();
return ret;
}
-int
-nfs4_state_start(void)
-{
- nfsd4_load_reboot_recovery_data();
- return __nfs4_state_start();
-}
-
static void
__nfs4_state_shutdown(void)
{
nfs4_unlock_state();
nfsd4_destroy_callback_queue();
}
+
+static void
+get_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid)
+{
+ if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG) && CURRENT_STATEID(stateid))
+ memcpy(stateid, &cstate->current_stateid, sizeof(stateid_t));
+}
+
+static void
+put_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid)
+{
+ if (cstate->minorversion) {
+ memcpy(&cstate->current_stateid, stateid, sizeof(stateid_t));
+ SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG);
+ }
+}
+
+void
+clear_current_stateid(struct nfsd4_compound_state *cstate)
+{
+ CLEAR_STATE_ID(cstate, CURRENT_STATE_ID_FLAG);
+}
+
+/*
+ * functions to set current state id
+ */
+void
+nfsd4_set_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp)
+{
+ put_stateid(cstate, &odp->od_stateid);
+}
+
+void
+nfsd4_set_openstateid(struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
+{
+ put_stateid(cstate, &open->op_stateid);
+}
+
+void
+nfsd4_set_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close)
+{
+ put_stateid(cstate, &close->cl_stateid);
+}
+
+void
+nfsd4_set_lockstateid(struct nfsd4_compound_state *cstate, struct nfsd4_lock *lock)
+{
+ put_stateid(cstate, &lock->lk_resp_stateid);
+}
+
+/*
+ * functions to consume current state id
+ */
+
+void
+nfsd4_get_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp)
+{
+ get_stateid(cstate, &odp->od_stateid);
+}
+
+void
+nfsd4_get_delegreturnstateid(struct nfsd4_compound_state *cstate, struct nfsd4_delegreturn *drp)
+{
+ get_stateid(cstate, &drp->dr_stateid);
+}
+
+void
+nfsd4_get_freestateid(struct nfsd4_compound_state *cstate, struct nfsd4_free_stateid *fsp)
+{
+ get_stateid(cstate, &fsp->fr_stateid);
+}
+
+void
+nfsd4_get_setattrstateid(struct nfsd4_compound_state *cstate, struct nfsd4_setattr *setattr)
+{
+ get_stateid(cstate, &setattr->sa_stateid);
+}
+
+void
+nfsd4_get_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close)
+{
+ get_stateid(cstate, &close->cl_stateid);
+}
+
+void
+nfsd4_get_lockustateid(struct nfsd4_compound_state *cstate, struct nfsd4_locku *locku)
+{
+ get_stateid(cstate, &locku->lu_stateid);
+}
+
+void
+nfsd4_get_readstateid(struct nfsd4_compound_state *cstate, struct nfsd4_read *read)
+{
+ get_stateid(cstate, &read->rd_stateid);
+}
+
+void
+nfsd4_get_writestateid(struct nfsd4_compound_state *cstate, struct nfsd4_write *write)
+{
+ get_stateid(cstate, &write->wr_stateid);
+}