int nfs4_op_create_session(struct nfs_argop4 *op, compound_data_t *data,
struct nfs_resop4 *resp)
{
/* Result of looking up the clientid in the confirmed ID
table */
nfs_client_id_t *conf = NULL; /* XXX these are not good names */
/* Result of looking up the clientid in the unconfirmed ID
table */
nfs_client_id_t *unconf = NULL;
/* The found clientid (either one of the preceding) */
nfs_client_id_t *found = NULL;
/* The found client record */
nfs_client_record_t *client_record;
/* The created session */
nfs41_session_t *nfs41_session = NULL;
/* Client supplied clientid */
clientid4 clientid = 0;
/* The client address as a string, for gratuitous logging */
const char *str_client_addr = "(unknown)";
/* The client name, for gratuitous logging */
char str_client[CLIENTNAME_BUFSIZE];
/* Display buffer for client name */
struct display_buffer dspbuf_client = {
sizeof(str_client), str_client, str_client
};
/* The clientid4 broken down into fields */
char str_clientid4[DISPLAY_CLIENTID_SIZE];
/* Display buffer for clientid4 */
struct display_buffer dspbuf_clientid4 = {
sizeof(str_clientid4), str_clientid4, str_clientid4
};
/* Return code from clientid calls */
int i, rc = 0;
/* Component for logging */
log_components_t component = COMPONENT_CLIENTID;
/* Abbreviated alias for arguments */
CREATE_SESSION4args * const arg_CREATE_SESSION4 =
&op->nfs_argop4_u.opcreate_session;
/* Abbreviated alias for response */
CREATE_SESSION4res * const res_CREATE_SESSION4 =
&resp->nfs_resop4_u.opcreate_session;
/* Abbreviated alias for successful response */
CREATE_SESSION4resok * const res_CREATE_SESSION4ok =
&res_CREATE_SESSION4->CREATE_SESSION4res_u.csr_resok4;
/* Make sure str_client is always printable even
* if log level changes midstream.
*/
display_printf(&dspbuf_client, "(unknown)");
display_reset_buffer(&dspbuf_client);
if (op_ctx->client != NULL)
str_client_addr = op_ctx->client->hostaddr_str;
if (isDebug(COMPONENT_SESSIONS))
component = COMPONENT_SESSIONS;
resp->resop = NFS4_OP_CREATE_SESSION;
res_CREATE_SESSION4->csr_status = NFS4_OK;
clientid = arg_CREATE_SESSION4->csa_clientid;
display_clientid(&dspbuf_clientid4, clientid);
if (data->minorversion == 0)
return res_CREATE_SESSION4->csr_status = NFS4ERR_INVAL;
LogDebug(component,
"CREATE_SESSION client addr=%s clientid=%s -------------------",
str_client_addr, str_clientid4);
/* First try to look up unconfirmed record */
rc = nfs_client_id_get_unconfirmed(clientid, &unconf);
if (rc == CLIENT_ID_SUCCESS) {
client_record = unconf->cid_client_record;
found = unconf;
} else {
rc = nfs_client_id_get_confirmed(clientid, &conf);
if (rc != CLIENT_ID_SUCCESS) {
/* No record whatsoever of this clientid */
LogDebug(component,
"%s clientid=%s",
clientid_error_to_str(rc), str_clientid4);
if (rc == CLIENT_ID_EXPIRED)
rc = CLIENT_ID_STALE;
res_CREATE_SESSION4->csr_status =
clientid_error_to_nfsstat_no_expire(rc);
return res_CREATE_SESSION4->csr_status;
}
client_record = conf->cid_client_record;
found = conf;
}
PTHREAD_MUTEX_lock(&client_record->cr_mutex);
inc_client_record_ref(client_record);
if (isFullDebug(component)) {
char str[LOG_BUFF_LEN];
struct display_buffer dspbuf = {sizeof(str), str, str};
display_client_record(&dspbuf, client_record);
LogFullDebug(component,
"Client Record %s cr_confirmed_rec=%p cr_unconfirmed_rec=%p",
str,
client_record->cr_confirmed_rec,
client_record->cr_unconfirmed_rec);
}
/* At this point one and only one of conf and unconf is
* non-NULL, and found also references the single clientid
* record that was found.
*/
LogDebug(component,
"CREATE_SESSION clientid=%s csa_sequence=%" PRIu32
" clientid_cs_seq=%" PRIu32 " data_oppos=%d data_use_drc=%d",
str_clientid4, arg_CREATE_SESSION4->csa_sequence,
found->cid_create_session_sequence, data->oppos,
data->use_drc);
if (isFullDebug(component)) {
char str[LOG_BUFF_LEN];
struct display_buffer dspbuf = {sizeof(str), str, str};
display_client_id_rec(&dspbuf, found);
LogFullDebug(component, "Found %s", str);
}
data->use_drc = false;
if (data->oppos == 0) {
/* Special case : the request is used without use of
* OP_SEQUENCE
*/
if ((arg_CREATE_SESSION4->csa_sequence + 1 ==
found->cid_create_session_sequence)
&& (found->cid_create_session_slot.cache_used)) {
data->use_drc = true;
data->cached_res =
&found->cid_create_session_slot.cached_result;
res_CREATE_SESSION4->csr_status = NFS4_OK;
dec_client_id_ref(found);
LogDebug(component,
"CREATE_SESSION replay=%p special case",
data->cached_res);
goto out;
} else if (arg_CREATE_SESSION4->csa_sequence !=
found->cid_create_session_sequence) {
res_CREATE_SESSION4->csr_status =
NFS4ERR_SEQ_MISORDERED;
dec_client_id_ref(found);
LogDebug(component,
"CREATE_SESSION returning NFS4ERR_SEQ_MISORDERED");
goto out;
}
}
if (unconf != NULL) {
/* First must match principal */
if (!nfs_compare_clientcred(&unconf->cid_credential,
&data->credential)) {
if (isDebug(component)) {
char *unconfirmed_addr = "(unknown)";
if (unconf->gsh_client != NULL)
unconfirmed_addr =
unconf->gsh_client->hostaddr_str;
LogDebug(component,
"Unconfirmed ClientId %s->'%s': Principals do not match... unconfirmed addr=%s Return NFS4ERR_CLID_INUSE",
str_clientid4,
str_client_addr,
unconfirmed_addr);
}
dec_client_id_ref(unconf);
res_CREATE_SESSION4->csr_status = NFS4ERR_CLID_INUSE;
goto out;
}
}
if (conf != NULL) {
if (isDebug(component) && conf != NULL)
display_clientid_name(&dspbuf_client, conf);
/* First must match principal */
if (!nfs_compare_clientcred(&conf->cid_credential,
&data->credential)) {
if (isDebug(component)) {
char *confirmed_addr = "(unknown)";
if (conf->gsh_client != NULL)
confirmed_addr =
conf->gsh_client->hostaddr_str;
LogDebug(component,
"Confirmed ClientId %s->%s addr=%s: Principals do not match... confirmed addr=%s Return NFS4ERR_CLID_INUSE",
str_clientid4, str_client,
str_client_addr, confirmed_addr);
}
/* Release our reference to the confirmed clientid. */
dec_client_id_ref(conf);
res_CREATE_SESSION4->csr_status = NFS4ERR_CLID_INUSE;
goto out;
}
/* In this case, the record was confirmed proceed with
CREATE_SESSION */
}
/* We don't need to do any further principal checks, we can't
* have a confirmed clientid record with a different principal
* than the unconfirmed record.
*/
/* At this point, we need to try and create the session before
* we modify the confirmed and/or unconfirmed clientid
* records.
*/
/* Check flags value (test CSESS15) */
if (arg_CREATE_SESSION4->csa_flags &
~(CREATE_SESSION4_FLAG_PERSIST |
CREATE_SESSION4_FLAG_CONN_BACK_CHAN |
CREATE_SESSION4_FLAG_CONN_RDMA)) {
LogDebug(component,
"Invalid create session flags %" PRIu32,
arg_CREATE_SESSION4->csa_flags);
dec_client_id_ref(found);
res_CREATE_SESSION4->csr_status = NFS4ERR_INVAL;
goto out;
}
/* Record session related information at the right place */
nfs41_session = pool_alloc(nfs41_session_pool);
if (nfs41_session == NULL) {
LogCrit(component, "Could not allocate memory for a session");
dec_client_id_ref(found);
res_CREATE_SESSION4->csr_status = NFS4ERR_SERVERFAULT;
goto out;
}
nfs41_session->clientid = clientid;
nfs41_session->clientid_record = found;
nfs41_session->refcount = 2; /* sentinel ref + call path ref */
nfs41_session->fore_channel_attrs =
arg_CREATE_SESSION4->csa_fore_chan_attrs;
nfs41_session->back_channel_attrs =
arg_CREATE_SESSION4->csa_back_chan_attrs;
nfs41_session->xprt = data->req->rq_xprt;
nfs41_session->flags = false;
nfs41_session->cb_program = 0;
PTHREAD_MUTEX_init(&nfs41_session->cb_mutex, NULL);
PTHREAD_COND_init(&nfs41_session->cb_cond, NULL);
for (i = 0; i < NFS41_NB_SLOTS; i++)
PTHREAD_MUTEX_init(&nfs41_session->slots[i].lock, NULL);
/* Take reference to clientid record on behalf the session. */
inc_client_id_ref(found);
/* add to head of session list (encapsulate?) */
PTHREAD_MUTEX_lock(&found->cid_mutex);
glist_add(&found->cid_cb.v41.cb_session_list,
&nfs41_session->session_link);
PTHREAD_MUTEX_unlock(&found->cid_mutex);
/* Set ca_maxrequests */
nfs41_session->fore_channel_attrs.ca_maxrequests = NFS41_NB_SLOTS;
nfs41_Build_sessionid(&clientid, nfs41_session->session_id);
res_CREATE_SESSION4ok->csr_sequence = arg_CREATE_SESSION4->csa_sequence;
/* return the input for wanting of something better (will
* change in later versions)
*/
res_CREATE_SESSION4ok->csr_fore_chan_attrs =
nfs41_session->fore_channel_attrs;
res_CREATE_SESSION4ok->csr_back_chan_attrs =
nfs41_session->back_channel_attrs;
res_CREATE_SESSION4ok->csr_flags = 0;
memcpy(res_CREATE_SESSION4ok->csr_sessionid,
nfs41_session->session_id,
NFS4_SESSIONID_SIZE);
/* Create Session replay cache */
data->cached_res = &found->cid_create_session_slot.cached_result;
found->cid_create_session_slot.cache_used = true;
LogDebug(component, "CREATE_SESSION replay=%p", data->cached_res);
if (!nfs41_Session_Set(nfs41_session)) {
LogDebug(component, "Could not insert session into table");
/* Release the session resources by dropping our reference
* and the sentinel reference.
*/
dec_session_ref(nfs41_session);
dec_session_ref(nfs41_session);
/* Decrement our reference to the clientid record */
dec_client_id_ref(found);
/* Maybe a more precise status would be better */
res_CREATE_SESSION4->csr_status = NFS4ERR_SERVERFAULT;
goto out;
}
/* Make sure we have a reference to the confirmed clientid
record if any */
if (conf == NULL) {
conf = client_record->cr_confirmed_rec;
if (isDebug(component) && conf != NULL)
display_clientid_name(&dspbuf_client, conf);
/* Need a reference to the confirmed record for below */
if (conf != NULL)
inc_client_id_ref(conf);
}
if (conf != NULL && conf->cid_clientid != clientid) {
/* Old confirmed record - need to expire it */
if (isDebug(component)) {
char str[LOG_BUFF_LEN];
struct display_buffer dspbuf = {sizeof(str), str, str};
display_client_id_rec(&dspbuf, conf);
LogDebug(component, "Expiring %s", str);
}
/* Expire clientid and release our reference. */
nfs_client_id_expire(conf, false);
dec_client_id_ref(conf);
conf = NULL;
}
if (conf != NULL) {
/* At this point we are updating the confirmed
* clientid. Update the confirmed record from the
* unconfirmed record.
*/
display_clientid(&dspbuf_clientid4, conf->cid_clientid);
LogDebug(component,
"Updating clientid %s->%s cb_program=%u",
str_clientid4, str_client,
arg_CREATE_SESSION4->csa_cb_program);
if (unconf != NULL) {
/* unhash the unconfirmed clientid record */
remove_unconfirmed_client_id(unconf);
/* Release our reference to the unconfirmed entry */
dec_client_id_ref(unconf);
}
if (isDebug(component)) {
char str[LOG_BUFF_LEN];
struct display_buffer dspbuf = {sizeof(str), str, str};
display_client_id_rec(&dspbuf, conf);
LogDebug(component, "Updated %s", str);
}
} else {
/* This is a new clientid */
if (isFullDebug(component)) {
char str[LOG_BUFF_LEN];
struct display_buffer dspbuf = {sizeof(str), str, str};
display_client_id_rec(&dspbuf, unconf);
LogFullDebug(component, "Confirming new %s", str);
}
rc = nfs_client_id_confirm(unconf, component);
if (rc != CLIENT_ID_SUCCESS) {
res_CREATE_SESSION4->csr_status =
clientid_error_to_nfsstat_no_expire(rc);
/* Need to destroy the session */
if (!nfs41_Session_Del(nfs41_session->session_id))
LogDebug(component,
"Oops nfs41_Session_Del failed");
/* Release our reference to the unconfirmed record */
dec_client_id_ref(unconf);
goto out;
}
nfs4_chk_clid(unconf);
conf = unconf;
unconf = NULL;
if (isDebug(component)) {
char str[LOG_BUFF_LEN];
struct display_buffer dspbuf = {sizeof(str), str, str};
display_client_id_rec(&dspbuf, conf);
LogDebug(component, "Confirmed %s", str);
}
}
conf->cid_create_session_sequence++;
/* Bump the lease timer */
conf->cid_last_renew = time(NULL);
/* Release our reference to the confirmed record */
dec_client_id_ref(conf);
if (isFullDebug(component)) {
char str[LOG_BUFF_LEN];
struct display_buffer dspbuf = {sizeof(str), str, str};
display_client_record(&dspbuf, client_record);
LogFullDebug(component,
"Client Record %s cr_confirmed_rec=%p cr_unconfirmed_rec=%p",
str,
client_record->cr_confirmed_rec,
client_record->cr_unconfirmed_rec);
}
/* Handle the creation of the back channel, if the client
requested one. */
if (arg_CREATE_SESSION4->csa_flags &
CREATE_SESSION4_FLAG_CONN_BACK_CHAN) {
nfs41_session->cb_program = arg_CREATE_SESSION4->csa_cb_program;
if (nfs_rpc_create_chan_v41(
nfs41_session,
arg_CREATE_SESSION4->csa_sec_parms.csa_sec_parms_len,
arg_CREATE_SESSION4->csa_sec_parms.csa_sec_parms_val)
== 0) {
res_CREATE_SESSION4ok->csr_flags |=
CREATE_SESSION4_FLAG_CONN_BACK_CHAN;
}
}
if (isDebug(component)) {
char str[LOG_BUFF_LEN];
struct display_buffer dspbuf = {sizeof(str), str, str};
display_session(&dspbuf, nfs41_session);
LogDebug(component,
"success %s csa_flags 0x%X csr_flags 0x%X",
str, arg_CREATE_SESSION4->csa_flags,
res_CREATE_SESSION4ok->csr_flags);
}
/* Release our reference to the session */
dec_session_ref(nfs41_session);
/* Successful exit */
res_CREATE_SESSION4->csr_status = NFS4_OK;
out:
PTHREAD_MUTEX_unlock(&client_record->cr_mutex);
/* Release our reference to the client record and return */
dec_client_record_ref(client_record);
return res_CREATE_SESSION4->csr_status;
}
int nfs41_op_create_session(struct nfs_argop4 *op,
compound_data_t * data, struct nfs_resop4 *resp)
{
nfs_client_id_t *pnfs_clientid;
nfs41_session_t *pnfs41_session = NULL;
clientid4 clientid = 0;
#define arg_CREATE_SESSION4 op->nfs_argop4_u.opcreate_session
#define res_CREATE_SESSION4 resp->nfs_resop4_u.opcreate_session
resp->resop = NFS4_OP_CREATE_SESSION;
res_CREATE_SESSION4.csr_status = NFS4_OK;
clientid = arg_CREATE_SESSION4.csa_clientid;
/* Does this id already exists ? */
if(nfs_client_id_Get_Pointer(clientid, &pnfs_clientid) != CLIENT_ID_SUCCESS)
{
/* The client id does not exist: stale client id */
res_CREATE_SESSION4.csr_status = NFS4ERR_STALE_CLIENTID;
return res_CREATE_SESSION4.csr_status;
}
LogDebug(COMPONENT_NFS_V4,
"CREATE_SESSION clientid=%lld csa_sequence=%"PRIu32
" clientid_cs_seq=%" PRIu32" data_oppos=%d data_use_drc=%d\n",
(long long unsigned int) clientid,
arg_CREATE_SESSION4.csa_sequence,
pnfs_clientid->create_session_sequence,
data->oppos,
data->use_drc);
data->use_drc = FALSE;
if(data->oppos == 0)
{
/* Special case : the request is used without use of OP_SEQUENCE */
if((arg_CREATE_SESSION4.csa_sequence + 1 == pnfs_clientid->create_session_sequence)
&& (pnfs_clientid->create_session_slot.cache_used == TRUE))
{
data->use_drc = TRUE;
data->pcached_res = pnfs_clientid->create_session_slot.cached_result;
res_CREATE_SESSION4.csr_status = NFS4_OK;
return res_CREATE_SESSION4.csr_status;
}
else if(arg_CREATE_SESSION4.csa_sequence != pnfs_clientid->create_session_sequence)
{
res_CREATE_SESSION4.csr_status = NFS4ERR_SEQ_MISORDERED;
return res_CREATE_SESSION4.csr_status;
}
}
pnfs_clientid->confirmed = CONFIRMED_CLIENT_ID;
pnfs_clientid->cb_program = arg_CREATE_SESSION4.csa_cb_program;
pnfs_clientid->create_session_sequence += 1;
/** @todo: BUGAZOMEU Gerer les parametres de secu */
/* Record session related information at the right place */
GetFromPool(pnfs41_session, &data->pclient->pool_session, nfs41_session_t);
if(pnfs41_session == NULL)
{
res_CREATE_SESSION4.csr_status = NFS4ERR_SERVERFAULT;
return res_CREATE_SESSION4.csr_status;
}
/* Check flags value (test CSESS15) */
if(arg_CREATE_SESSION4.csa_flags > CREATE_SESSION4_FLAG_CONN_RDMA)
{
res_CREATE_SESSION4.csr_status = NFS4ERR_INVAL;
return res_CREATE_SESSION4.csr_status;
}
memset((char *)pnfs41_session, 0, sizeof(nfs41_session_t));
pnfs41_session->clientid = clientid;
pnfs41_session->sequence = arg_CREATE_SESSION4.csa_sequence;
pnfs41_session->session_flags = CREATE_SESSION4_FLAG_CONN_BACK_CHAN;
pnfs41_session->fore_channel_attrs = arg_CREATE_SESSION4.csa_fore_chan_attrs;
pnfs41_session->back_channel_attrs = arg_CREATE_SESSION4.csa_back_chan_attrs;
/* Set ca_maxrequests */
pnfs41_session->fore_channel_attrs.ca_maxrequests = NFS41_NB_SLOTS;
pnfs41_session->fore_channel_attrs.ca_maxrequests = NFS41_NB_SLOTS;
if(nfs41_Build_sessionid(&clientid, pnfs41_session->session_id) != 1)
{
res_CREATE_SESSION4.csr_status = NFS4ERR_SERVERFAULT;
return res_CREATE_SESSION4.csr_status;
}
res_CREATE_SESSION4.CREATE_SESSION4res_u.csr_resok4.csr_sequence =
pnfs41_session->sequence;
res_CREATE_SESSION4.CREATE_SESSION4res_u.csr_resok4.csr_flags =
CREATE_SESSION4_FLAG_CONN_BACK_CHAN;
/* return the input for wantinf of something better (will change in later versions) */
res_CREATE_SESSION4.CREATE_SESSION4res_u.csr_resok4.csr_fore_chan_attrs =
pnfs41_session->fore_channel_attrs;
res_CREATE_SESSION4.CREATE_SESSION4res_u.csr_resok4.csr_back_chan_attrs =
pnfs41_session->back_channel_attrs;
memcpy(res_CREATE_SESSION4.CREATE_SESSION4res_u.csr_resok4.csr_sessionid,
pnfs41_session->session_id, NFS4_SESSIONID_SIZE);
/* Create Session replay cache */
data->pcached_res = pnfs_clientid->create_session_slot.cached_result;
pnfs_clientid->create_session_slot.cache_used = TRUE;
if(!nfs41_Session_Set(pnfs41_session->session_id, pnfs41_session))
{
res_CREATE_SESSION4.csr_status = NFS4ERR_SERVERFAULT; /* Maybe a more precise status would be better */
return res_CREATE_SESSION4.csr_status;
}
/* Successful exit */
res_CREATE_SESSION4.csr_status = NFS4_OK;
return res_CREATE_SESSION4.csr_status;
} /* nfs41_op_create_session */