/*
* Give the client the number of slots it requests bound by
- * NFSD_MAX_SLOTS_PER_SESSION and by sv_drc_max_pages.
+ * NFSD_MAX_SLOTS_PER_SESSION and by nfsd_drc_max_mem.
*
- * If we run out of pages (sv_drc_pages_used == sv_drc_max_pages) we
- * should (up to a point) re-negotiate active sessions and reduce their
- * slot usage to make rooom for new connections. For now we just fail the
- * create session.
+ * If we run out of reserved DRC memory we should (up to a point) re-negotiate
+ * active sessions and reduce their slot usage to make rooom for new
+ * connections. For now we just fail the create session.
*/
static int set_forechannel_maxreqs(struct nfsd4_channel_attrs *fchan)
{
- int status = 0, np = fchan->maxreqs * NFSD_PAGES_PER_SLOT;
+ int mem;
- spin_lock(&nfsd_serv->sv_lock);
- if (np + nfsd_serv->sv_drc_pages_used > nfsd_serv->sv_drc_max_pages)
- np = nfsd_serv->sv_drc_max_pages - nfsd_serv->sv_drc_pages_used;
- nfsd_serv->sv_drc_pages_used += np;
- spin_unlock(&nfsd_serv->sv_lock);
+ if (fchan->maxreqs < 1)
+ return nfserr_inval;
+ else if (fchan->maxreqs > NFSD_MAX_SLOTS_PER_SESSION)
+ fchan->maxreqs = NFSD_MAX_SLOTS_PER_SESSION;
- if (np <= 0) {
- status = nfserr_resource;
- fchan->maxreqs = 0;
- } else
- fchan->maxreqs = np / NFSD_PAGES_PER_SLOT;
+ mem = fchan->maxreqs * NFSD_SLOT_CACHE_SIZE;
- return status;
+ spin_lock(&nfsd_drc_lock);
+ if (mem + nfsd_drc_mem_used > nfsd_drc_max_mem)
+ mem = ((nfsd_drc_max_mem - nfsd_drc_mem_used) /
+ NFSD_SLOT_CACHE_SIZE) * NFSD_SLOT_CACHE_SIZE;
+ nfsd_drc_mem_used += mem;
+ spin_unlock(&nfsd_drc_lock);
+
+ fchan->maxreqs = mem / NFSD_SLOT_CACHE_SIZE;
+ if (fchan->maxreqs == 0)
+ return nfserr_resource;
+ return 0;
}
/*
* fchan holds the client values on input, and the server values on output
*/
static int init_forechannel_attrs(struct svc_rqst *rqstp,
- struct nfsd4_session *session,
- struct nfsd4_channel_attrs *fchan)
+ struct nfsd4_channel_attrs *session_fchan,
+ struct nfsd4_channel_attrs *fchan)
{
int status = 0;
__u32 maxcount = svc_max_payload(rqstp);
/* Use the client's max request and max response size if possible */
if (fchan->maxreq_sz > maxcount)
fchan->maxreq_sz = maxcount;
- session->se_fmaxreq_sz = fchan->maxreq_sz;
+ session_fchan->maxreq_sz = fchan->maxreq_sz;
if (fchan->maxresp_sz > maxcount)
fchan->maxresp_sz = maxcount;
- session->se_fmaxresp_sz = fchan->maxresp_sz;
+ session_fchan->maxresp_sz = fchan->maxresp_sz;
- /* Set the max response cached size our default which is
- * a multiple of PAGE_SIZE and small */
- session->se_fmaxresp_cached = NFSD_PAGES_PER_SLOT * PAGE_SIZE;
- fchan->maxresp_cached = session->se_fmaxresp_cached;
+ session_fchan->maxresp_cached = NFSD_SLOT_CACHE_SIZE;
+ fchan->maxresp_cached = session_fchan->maxresp_cached;
/* Use the client's maxops if possible */
if (fchan->maxops > NFSD_MAX_OPS_PER_COMPOUND)
fchan->maxops = NFSD_MAX_OPS_PER_COMPOUND;
- session->se_fmaxops = fchan->maxops;
-
- /* try to use the client requested number of slots */
- if (fchan->maxreqs > NFSD_MAX_SLOTS_PER_SESSION)
- fchan->maxreqs = NFSD_MAX_SLOTS_PER_SESSION;
+ session_fchan->maxops = fchan->maxops;
/* FIXME: Error means no more DRC pages so the server should
* recover pages from existing sessions. For now fail session
*/
status = set_forechannel_maxreqs(fchan);
- session->se_fnumslots = fchan->maxreqs;
+ session_fchan->maxreqs = fchan->maxreqs;
return status;
}
memset(&tmp, 0, sizeof(tmp));
/* FIXME: For now, we just accept the client back channel attributes. */
- status = init_forechannel_attrs(rqstp, &tmp, &cses->fore_channel);
+ tmp.se_bchannel = cses->back_channel;
+ status = init_forechannel_attrs(rqstp, &tmp.se_fchannel,
+ &cses->fore_channel);
if (status)
goto out;
/* allocate struct nfsd4_session and slot table in one piece */
- slotsize = tmp.se_fnumslots * sizeof(struct nfsd4_slot);
+ slotsize = tmp.se_fchannel.maxreqs * sizeof(struct nfsd4_slot);
new = kzalloc(sizeof(*new) + slotsize, GFP_KERNEL);
if (!new)
goto out;
int i;
ses = container_of(kref, struct nfsd4_session, se_ref);
- for (i = 0; i < ses->se_fnumslots; i++) {
+ for (i = 0; i < ses->se_fchannel.maxreqs; i++) {
struct nfsd4_cache_entry *e = &ses->se_slots[i].sl_cache_entry;
nfsd4_release_respages(e->ce_respages, e->ce_resused);
}
- kfree(ses->se_slots);
+ spin_lock(&nfsd_drc_lock);
+ nfsd_drc_mem_used -= ses->se_fchannel.maxreqs * NFSD_SLOT_CACHE_SIZE;
+ spin_unlock(&nfsd_drc_lock);
kfree(ses);
}
free_client(struct nfs4_client *clp)
{
shutdown_callback_client(clp);
- nfsd4_release_respages(clp->cl_slot.sl_cache_entry.ce_respages,
- clp->cl_slot.sl_cache_entry.ce_resused);
if (clp->cl_cred.cr_group_info)
put_group_info(clp->cl_cred.cr_group_info);
kfree(clp->cl_principal);
if ( !(parse_ipv4(se->se_callback_addr_len, se->se_callback_addr_val,
&cb->cb_addr, &cb->cb_port)))
goto out_err;
+ cb->cb_minorversion = 0;
cb->cb_prog = se->se_callback_prog;
cb->cb_ident = se->se_callback_ident;
return;
}
/*
+ * Encode the replay sequence operation from the slot values.
+ * If cachethis is FALSE encode the uncached rep error on the next
+ * operation which sets resp->p and increments resp->opcnt for
+ * nfs4svc_encode_compoundres.
+ *
+ */
+static __be32
+nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args,
+ struct nfsd4_compoundres *resp)
+{
+ 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_cache_entry.ce_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_cache_entry.ce_cachethis == 0) {
+ op = &args->ops[resp->opcnt++];
+ op->status = nfserr_retry_uncached_rep;
+ nfsd4_encode_operation(resp, op);
+ }
+ return op->status;
+}
+
+/*
* Keep the first page of the replay. Copy the NFSv4.1 data from the first
* cached page. Replace any futher replay pages from the cache.
*/
* session inactivity timer fires and a solo sequence operation
* is sent (lease renewal).
*/
- if (seq && nfsd4_not_cached(resp)) {
- seq->maxslots = resp->cstate.session->se_fnumslots;
- return nfs_ok;
- }
+ seq->maxslots = resp->cstate.session->se_fchannel.maxreqs;
+
+ /* Either returns 0 or nfserr_retry_uncached */
+ status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp);
+ if (status == nfserr_retry_uncached_rep)
+ return status;
if (!nfsd41_copy_replay_data(resp, entry)) {
/*
expire_client(conf);
goto out_new;
}
- if (ip_addr != conf->cl_addr &&
- !(exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A)) {
- /* Client collision. 18.35.4 case 3 */
- status = nfserr_clid_inuse;
- goto out;
- }
/*
* Set bit when the owner id and verifier map to an already
* confirmed client id (18.35.3).
copy_verf(conf, &verf);
new = conf;
goto out_copy;
- } else {
- /* 18.35.4 case 7 */
- if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) {
- status = nfserr_noent;
- goto out;
- }
+ }
+
+ /* 18.35.4 case 7 */
+ if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) {
+ status = nfserr_noent;
+ goto out;
}
unconf = find_unconfirmed_client_by_str(dname, strhashval, true);
exid->clientid.cl_boot = new->cl_clientid.cl_boot;
exid->clientid.cl_id = new->cl_clientid.cl_id;
- new->cl_slot.sl_seqid = 0;
exid->seqid = 1;
nfsd4_set_ex_flags(new, exid);
dprintk("nfsd4_exchange_id seqid %d flags %x\n",
- new->cl_slot.sl_seqid, new->cl_exchange_flags);
+ new->cl_cs_slot.sl_seqid, new->cl_exchange_flags);
status = nfs_ok;
out:
}
static int
-check_slot_seqid(u32 seqid, struct nfsd4_slot *slot)
+check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse)
{
- dprintk("%s enter. seqid %d slot->sl_seqid %d\n", __func__, seqid,
- slot->sl_seqid);
+ dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid,
+ slot_seqid);
/* The slot is in use, and no response has been sent. */
- if (slot->sl_inuse) {
- if (seqid == slot->sl_seqid)
+ if (slot_inuse) {
+ if (seqid == slot_seqid)
return nfserr_jukebox;
else
return nfserr_seq_misordered;
}
/* Normal */
- if (likely(seqid == slot->sl_seqid + 1))
+ if (likely(seqid == slot_seqid + 1))
return nfs_ok;
/* Replay */
- if (seqid == slot->sl_seqid)
+ if (seqid == slot_seqid)
return nfserr_replay_cache;
/* Wraparound */
- if (seqid == 1 && (slot->sl_seqid + 1) == 0)
+ if (seqid == 1 && (slot_seqid + 1) == 0)
return nfs_ok;
/* Misordered replay or misordered new request */
return nfserr_seq_misordered;
}
+/*
+ * Cache the create session result into the create session single DRC
+ * slot cache by saving the xdr structure. sl_seqid has been set.
+ * Do this for solo or embedded create session operations.
+ */
+static void
+nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses,
+ struct nfsd4_clid_slot *slot, int nfserr)
+{
+ slot->sl_status = nfserr;
+ memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses));
+}
+
+static __be32
+nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses,
+ struct nfsd4_clid_slot *slot)
+{
+ memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses));
+ return slot->sl_status;
+}
+
__be32
nfsd4_create_session(struct svc_rqst *rqstp,
struct nfsd4_compound_state *cstate,
struct nfsd4_create_session *cr_ses)
{
u32 ip_addr = svc_addr_in(rqstp)->sin_addr.s_addr;
- struct nfsd4_compoundres *resp = rqstp->rq_resp;
struct nfs4_client *conf, *unconf;
- struct nfsd4_slot *slot = NULL;
+ struct nfsd4_clid_slot *cs_slot = NULL;
int status = 0;
nfs4_lock_state();
conf = find_confirmed_client(&cr_ses->clientid);
if (conf) {
- slot = &conf->cl_slot;
- status = check_slot_seqid(cr_ses->seqid, slot);
+ cs_slot = &conf->cl_cs_slot;
+ status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0);
if (status == nfserr_replay_cache) {
dprintk("Got a create_session replay! seqid= %d\n",
- slot->sl_seqid);
- cstate->slot = slot;
- cstate->status = status;
+ cs_slot->sl_seqid);
/* Return the cached reply status */
- status = nfsd4_replay_cache_entry(resp, NULL);
+ status = nfsd4_replay_create_session(cr_ses, cs_slot);
goto out;
- } else if (cr_ses->seqid != conf->cl_slot.sl_seqid + 1) {
+ } else if (cr_ses->seqid != cs_slot->sl_seqid + 1) {
status = nfserr_seq_misordered;
dprintk("Sequence misordered!\n");
dprintk("Expected seqid= %d but got seqid= %d\n",
- slot->sl_seqid, cr_ses->seqid);
+ cs_slot->sl_seqid, cr_ses->seqid);
goto out;
}
- conf->cl_slot.sl_seqid++;
+ cs_slot->sl_seqid++;
} else if (unconf) {
if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) ||
(ip_addr != unconf->cl_addr)) {
goto out;
}
- slot = &unconf->cl_slot;
- status = check_slot_seqid(cr_ses->seqid, slot);
+ cs_slot = &unconf->cl_cs_slot;
+ status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0);
if (status) {
/* an unconfirmed replay returns misordered */
status = nfserr_seq_misordered;
- goto out;
+ goto out_cache;
}
- slot->sl_seqid++; /* from 0 to 1 */
+ cs_slot->sl_seqid++; /* from 0 to 1 */
move_to_confirmed(unconf);
/*
memcpy(cr_ses->sessionid.data, conf->cl_sessionid.data,
NFS4_MAX_SESSIONID_LEN);
- cr_ses->seqid = slot->sl_seqid;
+ cr_ses->seqid = cs_slot->sl_seqid;
- slot->sl_inuse = true;
- cstate->slot = slot;
- /* Ensure a page is used for the cache */
- slot->sl_cache_entry.ce_cachethis = 1;
+out_cache:
+ /* cache solo and embedded create sessions under the state lock */
+ nfsd4_cache_create_session(cr_ses, cs_slot, status);
out:
nfs4_unlock_state();
dprintk("%s returns %d\n", __func__, ntohl(status));
goto out;
status = nfserr_badslot;
- if (seq->slotid >= session->se_fnumslots)
+ if (seq->slotid >= session->se_fchannel.maxreqs)
goto out;
slot = &session->se_slots[seq->slotid];
dprintk("%s: slotid %d\n", __func__, seq->slotid);
- status = check_slot_seqid(seq->seqid, slot);
+ status = check_slot_seqid(seq->seqid, slot->sl_seqid, slot->sl_inuse);
if (status == nfserr_replay_cache) {
cstate->slot = slot;
cstate->session = session;
INIT_LIST_HEAD(&conf_str_hashtbl[i]);
INIT_LIST_HEAD(&unconf_str_hashtbl[i]);
INIT_LIST_HEAD(&unconf_id_hashtbl[i]);
+ INIT_LIST_HEAD(&reclaim_str_hashtbl[i]);
}
for (i = 0; i < SESSION_HASH_SIZE; i++)
INIT_LIST_HEAD(&sessionid_hashtbl[i]);
INIT_LIST_HEAD(&close_lru);
INIT_LIST_HEAD(&client_lru);
INIT_LIST_HEAD(&del_recall_lru);
- for (i = 0; i < CLIENT_HASH_SIZE; i++)
- INIT_LIST_HEAD(&reclaim_str_hashtbl[i]);
reclaim_str_hashtbl_size = 0;
return 0;
}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff