static void getq_response_handler(lcb_server_t *server, packet_info *info)
{
lcb_t root = server->instance;
char *packet;
lcb_uint16_t nkey;
const char *key = get_key(server, &nkey, &packet);
lcb_error_t rc;
lcb_get_resp_t resp;
fprintf(stderr, "\n The datatype is ...%d", PACKET_DATATYPE(info));
if (key == NULL) {
lcb_error_handler(server->instance, LCB_EINTERNAL, NULL);
return;
} else if (PACKET_STATUS(info) == PROTOCOL_BINARY_RESPONSE_SUCCESS) {
const protocol_binary_response_getq *getq = PACKET_EPHEMERAL_START(info);
rc = LCB_SUCCESS;
setup_lcb_get_resp_t(&resp, key, nkey,
PACKET_VALUE(info), PACKET_NVALUE(info),
ntohl(getq->message.body.flags),
PACKET_CAS(info),
PACKET_DATATYPE(info));
} else {
rc = map_error(root, PACKET_STATUS(info));
setup_lcb_get_resp_t(&resp, key, nkey, NULL, 0, 0, 0, 0);
}
root->callbacks.get(root, info->ct.cookie, rc, &resp);
release_key(server, packet);
}
static void
H_stats(mc_PIPELINE *pipeline, mc_PACKET *request, packet_info *response,
lcb_error_t immerr)
{
lcb_t root = pipeline->parent->cqdata;
lcb_RESPSTATS resp = { 0 };
mc_REQDATAEX *exdata;
MK_ERROR(root, &resp, response, immerr);
resp.version = 0;
exdata = request->u_rdata.exdata;
if (resp.rc != LCB_SUCCESS || PACKET_NKEY(response) == 0) {
/* Call the handler without a response, this indicates that this server
* has finished responding */
exdata->procs->handler(pipeline, request, resp.rc, NULL);
return;
}
if ((resp.nkey = PACKET_NKEY(response))) {
resp.key = PACKET_KEY(response);
if ((resp.value = PACKET_VALUE(response))) {
resp.nvalue = PACKET_NVALUE(response);
}
}
exdata->procs->handler(pipeline, request, resp.rc, &resp);
}
static void
H_getreplica(mc_PIPELINE *pipeline, mc_PACKET *request, packet_info *response,
lcb_error_t immerr)
{
lcb_error_t rc;
lcb_get_resp_t resp;
lcb_t instance = pipeline->parent->instance;
void *freeptr = NULL;
MK_RESPKEY(&resp, 0, request);
MK_ERROR(instance, rc, response, immerr);
resp.version = 0;
if (rc == LCB_SUCCESS) {
const protocol_binary_response_get *get = PACKET_EPHEMERAL_START(response);
resp.v.v0.cas = PACKET_CAS(response);
resp.v.v0.datatype = PACKET_DATATYPE(response);
resp.v.v0.flags = ntohl(get->message.body.flags);
resp.v.v0.bytes = PACKET_VALUE(response);
resp.v.v0.nbytes = PACKET_NVALUE(response);
}
maybe_decompress(instance, response, &resp, &freeptr);
request->u_rdata.exdata->callback(pipeline, request, rc, &resp);
free(freeptr);
}
static int
sdlookup_next(const packet_info *response, lcb_SDENTRY *ent, size_t *iter)
{
const char *buf;
lcb_U16 rc;
lcb_U32 vlen;
if (*iter == PACKET_NVALUE(response)) {
return 0;
}
buf = PACKET_VALUE(response);
buf += *iter;
memcpy(&rc, buf, 2);
memcpy(&vlen, buf + 2, 4);
rc = ntohs(rc);
vlen = ntohl(vlen);
ent->status = map_error(NULL, rc);
ent->nvalue = vlen;
if (ent->status == LCB_SUCCESS) {
ent->value = buf + 6;
} else {
ent->value = NULL;
ent->nvalue = 0;
}
*iter += (6 + vlen);
return 1;
}
/**
* Optionally decompress an incoming payload.
* @param o The instance
* @param resp The response received
* @param[out] bytes pointer to the final payload
* @param[out] nbytes pointer to the size of the final payload
* @param[out] freeptr pointer to free. This should be initialized to `NULL`.
* If temporary dynamic storage is required this will be set to the allocated
* pointer upon return. Otherwise it will be set to NULL. In any case it must
*/
static void
maybe_decompress(lcb_t o,
const packet_info *respkt, lcb_RESPGET *rescmd, void **freeptr)
{
lcb_U8 dtype = 0;
if (!PACKET_NVALUE(respkt)) {
return;
}
if (PACKET_DATATYPE(respkt) & PROTOCOL_BINARY_DATATYPE_JSON) {
dtype = LCB_VALUE_F_JSON;
}
if (PACKET_DATATYPE(respkt) & PROTOCOL_BINARY_DATATYPE_COMPRESSED) {
if (LCBT_SETTING(o, compressopts) & LCB_COMPRESS_IN) {
/* if we inflate, we don't set the flag */
mcreq_inflate_value(
PACKET_VALUE(respkt), PACKET_NVALUE(respkt),
&rescmd->value, &rescmd->nvalue, freeptr);
} else {
/* user doesn't want inflation. signal it's compressed */
dtype |= LCB_VALUE_F_SNAPPYCOMP;
}
}
rescmd->datatype = dtype;
}
static void
H_get(mc_PIPELINE *pipeline, mc_PACKET *request, packet_info *response,
lcb_error_t immerr)
{
lcb_t o;
lcb_RESPGET resp = { 0 };
void *freeptr = NULL;
o = pipeline->parent->cqdata;
init_resp3(o, response, request, immerr, (lcb_RESPBASE *)&resp);
if (resp.rc == LCB_SUCCESS) {
const protocol_binary_response_getq *getq =
PACKET_EPHEMERAL_START(response);
resp.datatype = PACKET_DATATYPE(response);
resp.itmflags = ntohl(getq->message.body.flags);
resp.value = PACKET_VALUE(response);
resp.nvalue = PACKET_NVALUE(response);
resp.bufh = response->bufh;
}
maybe_decompress(o, response, &resp, &freeptr);
TRACE_GET_END(response, &resp);
INVOKE_CALLBACK3(request, &resp, o, LCB_CALLBACK_GET);
free(freeptr);
}
static void
H_stats(mc_PIPELINE *pipeline, mc_PACKET *request, packet_info *response,
lcb_error_t immerr)
{
lcb_t root = pipeline->parent->instance;
lcb_error_t rc;
lcb_server_stat_resp_t resp;
mc_REQDATAEX *exdata;
MK_ERROR(root, rc, response, immerr);
resp.version = 0;
exdata = request->u_rdata.exdata;
if (rc != LCB_SUCCESS || PACKET_NKEY(response) == 0) {
/* Call the handler without a response, this indicates that this server
* has finished responding */
exdata->callback(pipeline, request, rc, NULL);
return;
}
if ((resp.v.v0.nkey = PACKET_NKEY(response))) {
resp.v.v0.key = PACKET_KEY(response);
if ((resp.v.v0.nbytes = PACKET_NVALUE(response))) {
resp.v.v0.bytes = PACKET_VALUE(response);
}
}
exdata->callback(pipeline, request, rc, &resp);
}
static void stat_response_handler(lcb_server_t *server, packet_info *info)
{
lcb_t root = server->instance;
lcb_uint16_t status = PACKET_STATUS(info);
lcb_error_t rc = map_error(root, status);
lcb_server_stat_resp_t resp;
struct lcb_command_data_st *command_data = &info->ct;
if (status == PROTOCOL_BINARY_RESPONSE_SUCCESS) {
if (!PACKET_NKEY(info)) {
if (lcb_lookup_server_with_command(root, PROTOCOL_BINARY_CMD_STAT,
PACKET_OPAQUE(info), server) < 0) {
/* notify client that data is ready */
setup_lcb_server_stat_resp_t(&resp, NULL, NULL, 0, NULL, 0);
root->callbacks.stat(root, command_data->cookie, rc, &resp);
}
return;
}
setup_lcb_server_stat_resp_t(&resp, server->authority,
PACKET_KEY(info), PACKET_NKEY(info),
PACKET_VALUE(info), PACKET_NVALUE(info));
root->callbacks.stat(root, command_data->cookie, rc, &resp);
} else {
setup_lcb_server_stat_resp_t(&resp, server->authority,
NULL, 0, NULL, 0);
root->callbacks.stat(root, command_data->cookie, rc, &resp);
/* run callback with null-null-null to signal the end of transfer */
if (lcb_lookup_server_with_command(root, PROTOCOL_BINARY_CMD_STAT,
PACKET_OPAQUE(info), server) < 0) {
setup_lcb_server_stat_resp_t(&resp, NULL, NULL, 0, NULL, 0);
root->callbacks.stat(root, command_data->cookie, LCB_SUCCESS, &resp);
}
}
}
static int
sdmutate_next(const packet_info *response, lcb_SDENTRY *ent, size_t *iter)
{
const char *buf, *buf_end;
lcb_U16 rc;
lcb_U32 vlen;
if (*iter == PACKET_NVALUE(response)) {
return 0;
}
buf_end = (const char *)PACKET_VALUE(response) + PACKET_NVALUE(response);
buf = ((const char *)(PACKET_VALUE(response))) + *iter;
#define ADVANCE_BUF(sz) \
buf += sz; \
*iter += sz; \
assert(buf <= buf_end); \
/* Index */
ent->index = *(lcb_U8*)buf;
ADVANCE_BUF(1);
/* Status */
memcpy(&rc, buf, 2);
ADVANCE_BUF(2);
rc = ntohs(rc);
ent->status = map_error(NULL, rc);
if (rc == PROTOCOL_BINARY_RESPONSE_SUCCESS) {
memcpy(&vlen, buf, 4);
ADVANCE_BUF(4);
vlen = ntohl(vlen);
ent->nvalue = vlen;
ent->value = buf;
ADVANCE_BUF(vlen);
} else {
ent->value = NULL;
ent->nvalue = 0;
}
return 1;
#undef ADVANCE_BUF
}
static void config_handler(lcb_server_t *server, packet_info *info)
{
lcb_error_t rc = map_error(server->instance, PACKET_STATUS(info));
lcb_cccp_update2(info->ct.cookie, rc,
PACKET_VALUE(info),
PACKET_NVALUE(info),
&server->curhost);
}
/**
* Invoked when get a NOT_MY_VBUCKET response. If the response contains a JSON
* payload then we refresh the configuration with it.
*
* This function returns 1 if the operation was successfully rescheduled;
* otherwise it returns 0. If it returns 0 then we give the error back to the
* user.
*/
static int
handle_nmv(mc_SERVER *oldsrv, packet_info *resinfo, mc_PACKET *oldpkt)
{
mc_PACKET *newpkt;
protocol_binary_request_header hdr;
lcb_error_t err = LCB_ERROR;
lcb_t instance = oldsrv->instance;
lcb_U16 vbid;
clconfig_provider *cccp = lcb_confmon_get_provider(instance->confmon,
LCB_CLCONFIG_CCCP);
mcreq_read_hdr(oldpkt, &hdr);
vbid = ntohs(hdr.request.vbucket);
lcb_log(LOGARGS(oldsrv, WARN), LOGFMT "NOT_MY_VBUCKET. Packet=%p (S=%u). VBID=%u", LOGID(oldsrv), (void*)oldpkt, oldpkt->opaque, vbid);
/* Notify of new map */
lcb_vbguess_remap(instance, vbid, oldsrv->pipeline.index);
if (PACKET_NBODY(resinfo) && cccp->enabled) {
lcb_string s;
lcb_string_init(&s);
lcb_string_append(&s, PACKET_VALUE(resinfo), PACKET_NVALUE(resinfo));
err = lcb_cccp_update(cccp, mcserver_get_host(oldsrv), &s);
lcb_string_release(&s);
}
if (err != LCB_SUCCESS) {
int bs_options;
if (instance->cur_configinfo->origin == LCB_CLCONFIG_CCCP) {
/**
* XXX: Not enough to see if cccp was enabled, since cccp might
* be requested by a user, but would still not actually be active
* for clusters < 2.5 If our current config is from CCCP
* then we can be fairly certain that CCCP is indeed working.
*
* For this reason, we don't use if (cccp->enabled) {...}
*/
bs_options = LCB_BS_REFRESH_THROTTLE;
} else {
bs_options = LCB_BS_REFRESH_ALWAYS;
}
lcb_bootstrap_common(instance, bs_options);
}
if (!lcb_should_retry(oldsrv->settings, oldpkt, LCB_NOT_MY_VBUCKET)) {
return 0;
}
/** Reschedule the packet again .. */
newpkt = mcreq_renew_packet(oldpkt);
newpkt->flags &= ~MCREQ_STATE_FLAGS;
lcb_retryq_nmvadd(instance->retryq, (mc_EXPACKET*)newpkt);
return 1;
}
static void
H_arithmetic(mc_PIPELINE *pipeline, mc_PACKET *request, packet_info *response,
lcb_error_t immerr)
{
lcb_t root = pipeline->parent->cqdata;
lcb_RESPCOUNTER resp = { 0 };
init_resp3(root, response, request, immerr, (lcb_RESPBASE*)&resp);
if (resp.rc == LCB_SUCCESS) {
memcpy(&resp.value, PACKET_VALUE(response), sizeof(resp.value));
resp.value = lcb_ntohll(resp.value);
handle_synctoken(root, response, request, &resp.synctoken);
}
resp.cas = PACKET_CAS(response);
TRACE_ARITHMETIC_END(response, &resp);
INVOKE_CALLBACK3(request, &resp, root, LCB_CALLBACK_COUNTER);
}
/**
* Invoked when get a NOT_MY_VBUCKET response. If the response contains a JSON
* payload then we refresh the configuration with it.
*
* This function returns 1 if the operation was successfully rescheduled;
* otherwise it returns 0. If it returns 0 then we give the error back to the
* user.
*/
static int
handle_nmv(mc_SERVER *oldsrv, packet_info *resinfo, mc_PACKET *oldpkt)
{
mc_PACKET *newpkt;
protocol_binary_request_header hdr;
lcb_error_t err = LCB_ERROR;
lcb_t instance = oldsrv->instance;
lcb_U16 vbid;
int tmpix;
clconfig_provider *cccp = lcb_confmon_get_provider(instance->confmon,
LCB_CLCONFIG_CCCP);
mcreq_read_hdr(oldpkt, &hdr);
vbid = ntohs(hdr.request.vbucket);
lcb_log(LOGARGS(oldsrv, WARN), LOGFMT "NOT_MY_VBUCKET. Packet=%p (S=%u). VBID=%u", LOGID(oldsrv), (void*)oldpkt, oldpkt->opaque, vbid);
/* Notify of new map */
tmpix = lcb_vbguess_remap(LCBT_VBCONFIG(instance),
instance->vbguess, vbid, oldsrv->pipeline.index);
if (tmpix > -1 && tmpix != oldsrv->pipeline.index) {
lcb_log(LOGARGS(oldsrv, TRACE), LOGFMT "Heuristically set IX=%d as master for VBID=%u", LOGID(oldsrv), tmpix, vbid);
}
if (PACKET_NBODY(resinfo) && cccp->enabled) {
lcb_string s;
lcb_string_init(&s);
lcb_string_append(&s, PACKET_VALUE(resinfo), PACKET_NVALUE(resinfo));
err = lcb_cccp_update(cccp, mcserver_get_host(oldsrv), &s);
lcb_string_release(&s);
}
if (err != LCB_SUCCESS) {
lcb_bootstrap_common(instance, LCB_BS_REFRESH_ALWAYS);
}
if (!lcb_should_retry(oldsrv->settings, oldpkt, LCB_NOT_MY_VBUCKET)) {
return 0;
}
/** Reschedule the packet again .. */
newpkt = mcreq_renew_packet(oldpkt);
newpkt->flags &= ~MCREQ_STATE_FLAGS;
lcb_retryq_add(instance->retryq, (mc_EXPACKET*)newpkt, LCB_NOT_MY_VBUCKET);
return 1;
}
static void
H_arithmetic(mc_PIPELINE *pipeline, mc_PACKET *request, packet_info *response,
lcb_error_t immerr)
{
lcb_t root = pipeline->parent->cqdata;
respack_COUNTER w = { { 0 } };
init_resp3(root, response, request, immerr, (lcb_RESPBASE*)&w.resp);
if (w.resp.rc == LCB_SUCCESS) {
memcpy(&w.resp.value, PACKET_VALUE(response), sizeof(w.resp.value));
w.resp.value = lcb_ntohll(w.resp.value);
w.resp.rflags |= LCB_RESP_F_EXTDATA;
handle_mutation_token(root, response, request, &w.mt);
}
w.resp.cas = PACKET_CAS(response);
TRACE_ARITHMETIC_END(response, &w.resp);
INVOKE_CALLBACK3(request, &w.resp, root, LCB_CALLBACK_COUNTER);
}
static void
H_getreplica(mc_PIPELINE *pipeline, mc_PACKET *request, packet_info *response,
lcb_error_t immerr)
{
lcb_RESPGET resp = { 0 };
lcb_t instance = pipeline->parent->cqdata;
void *freeptr = NULL;
mc_REQDATAEX *rd = request->u_rdata.exdata;
init_resp3(instance, response, request, immerr, (lcb_RESPBASE *)&resp);
if (resp.rc == LCB_SUCCESS) {
const protocol_binary_response_get *get = PACKET_EPHEMERAL_START(response);
resp.itmflags = ntohl(get->message.body.flags);
resp.datatype = PACKET_DATATYPE(response);
resp.value = PACKET_VALUE(response);
resp.nvalue = PACKET_NVALUE(response);
resp.bufh = response->bufh;
}
maybe_decompress(instance, response, &resp, &freeptr);
rd->procs->handler(pipeline, request, resp.rc, &resp);
free(freeptr);
}
LIBCOUCHBASE_API
int
lcb_sdresult_next(const lcb_RESPSUBDOC *resp, lcb_SDENTRY *ent, size_t *iter)
{
size_t iter_s = 0;
const packet_info *response = (const packet_info*)resp->responses;
if (!response) {
return 0;
}
if (!iter) {
/* Single response */
iter = &iter_s;
}
switch (PACKET_OPCODE(response)) {
case PROTOCOL_BINARY_CMD_SUBDOC_MULTI_LOOKUP:
return sdlookup_next(response, ent, iter);
case PROTOCOL_BINARY_CMD_SUBDOC_MULTI_MUTATION:
return sdmutate_next(response, ent, iter);
default:
if (*iter) {
return 0;
}
*iter = 1;
if (resp->rc == LCB_SUCCESS || resp->rc == LCB_SUBDOC_MULTI_FAILURE) {
ent->status = map_error(NULL, PACKET_STATUS(response));
ent->value = PACKET_VALUE(response);
ent->nvalue = PACKET_NVALUE(response);
ent->index = 0;
return 1;
} else {
return 0;
}
}
}
static void
H_get(mc_PIPELINE *pipeline, mc_PACKET *request, packet_info *response,
lcb_error_t immerr)
{
lcb_error_t rc;
lcb_t o;
lcb_get_resp_t resp;
void *freeptr = NULL;
o = pipeline->parent->instance;
MK_RESPKEY(&resp, 0, request);
MK_ERROR(o, rc, response, immerr);
resp.version = 0;
if (rc == LCB_SUCCESS) {
const protocol_binary_response_getq *getq =
PACKET_EPHEMERAL_START(response);
resp.v.v0.cas = PACKET_CAS(response);
resp.v.v0.datatype = PACKET_DATATYPE(response);
resp.v.v0.flags = ntohl(getq->message.body.flags);
resp.v.v0.bytes = PACKET_VALUE(response);
resp.v.v0.nbytes = PACKET_NVALUE(response);
rc = LCB_SUCCESS;
} else {
resp.v.v0.cas = 0;
resp.v.v0.nbytes = 0;
resp.v.v0.bytes = NULL;
resp.v.v0.flags = 0;
}
maybe_decompress(o, response, &resp, &freeptr);
INVOKE_CALLBACK(request, o->callbacks.get,
(o, MCREQ_PKT_COOKIE(request), rc, &resp));
free(freeptr);
}
static void get_replica_response_handler(lcb_server_t *server,
packet_info *info)
{
lcb_t root = server->instance;
lcb_uint16_t nkey;
const char *key;
char *packet;
lcb_uint16_t status = PACKET_STATUS(info);
lcb_error_t rc = map_error(root, status);
/**
* Success? always perform the callback
*/
if (status == PROTOCOL_BINARY_RESPONSE_SUCCESS) {
const protocol_binary_response_get *get = PACKET_EPHEMERAL_START(info);
lcb_get_resp_t resp;
setup_lcb_get_resp_t(&resp,
PACKET_KEY(info), PACKET_NKEY(info),
PACKET_VALUE(info), PACKET_NVALUE(info),
ntohl(get->message.body.flags),
PACKET_CAS(info),
PACKET_DATATYPE(info));
root->callbacks.get(root, info->ct.cookie, rc, &resp);
return;
}
key = get_key(server, &nkey, &packet);
/**
* Following code handles errors.
*/
if (info->ct.replica == -1) {
/* Perform the callback. Either SELECT or ALL */
lcb_get_resp_t resp;
setup_lcb_get_resp_t(&resp, key, nkey, NULL, 0, 0, 0, 0);
PACKET_TRACE(TRACE_GET_END, info, rc, &resp);
root->callbacks.get(root, info->ct.cookie, rc, &resp);
release_key(server, packet);
return;
}
/** LCB_REPLICA_FIRST */
if (status == PROTOCOL_BINARY_RESPONSE_NOT_MY_VBUCKET) {
/**
* the config was updated, start from first replica.
* Reset the iteration count
*/
info->ct.replica = 0;
} else {
info->ct.replica++;
}
if (info->ct.replica < root->nreplicas) {
/* try next replica */
protocol_binary_request_get req;
lcb_server_t *new_server;
int idx = vbucket_get_replica(root->vbucket_config,
info->ct.vbucket,
info->ct.replica);
if (idx < 0 || idx > (int)root->nservers) {
lcb_error_handler(root, LCB_NETWORK_ERROR,
"GET_REPLICA: missing server");
release_key(server, packet);
return;
}
new_server = root->servers + idx;
memset(&req, 0, sizeof(req));
req.message.header.request.magic = PROTOCOL_BINARY_REQ;
req.message.header.request.datatype = PROTOCOL_BINARY_RAW_BYTES;
req.message.header.request.opcode = CMD_GET_REPLICA;
req.message.header.request.keylen = ntohs((lcb_uint16_t)nkey);
req.message.header.request.vbucket = ntohs(info->ct.vbucket);
req.message.header.request.bodylen = ntohl((lcb_uint32_t)nkey);
req.message.header.request.opaque = ++root->seqno;
TRACE_GET_BEGIN(&req, key, nkey, 0);
lcb_server_retry_packet(new_server, &info->ct,
req.bytes, sizeof(req.bytes));
lcb_server_write_packet(new_server, key, nkey);
lcb_server_end_packet(new_server);
lcb_server_send_packets(new_server);
} else {
/* give up and report the error */
lcb_get_resp_t resp;
setup_lcb_get_resp_t(&resp, key, nkey, NULL, 0, 0, 0, 0);
PACKET_TRACE(TRACE_GET_END, info, rc, &resp)
root->callbacks.get(root, info->ct.cookie, rc, &resp);
}
release_key(server, packet);
}
/**
* Returns 1 if retried, 0 if the command should fail, -1 for an internal
* error
*/
static int handle_not_my_vbucket(lcb_server_t *c,
packet_info *resinfo,
protocol_binary_request_header *oldreq,
struct lcb_command_data_st *oldct)
{
int idx;
char *body;
lcb_size_t nbody, nr;
lcb_server_t *new_srv;
struct lcb_command_data_st ct;
protocol_binary_request_header req;
hrtime_t now;
lcb_string config_string;
lcb_error_t err = LCB_ERROR;
lcb_log(LOGARGS(c, WARN),
"NOT_MY_VBUCKET; Server=%p,ix=%d,real_start=%lu,vb=%d",
(void *)c, c->index,
(unsigned long)oldct->real_start,
(int)ntohs(oldreq->request.vbucket));
lcb_string_init(&config_string);
if (PACKET_NBODY(resinfo)) {
lcb_string_append(&config_string,
PACKET_VALUE(resinfo),
PACKET_NVALUE(resinfo));
err = lcb_cccp_update(lcb_confmon_get_provider(c->instance->confmon,
LCB_CLCONFIG_CCCP),
c->curhost.host,
&config_string);
}
lcb_string_release(&config_string);
if (err != LCB_SUCCESS) {
lcb_bootstrap_refresh(c->instance);
}
/* re-schedule command to new server */
if (!c->instance->settings.vb_noguess) {
idx = vbucket_found_incorrect_master(c->instance->vbucket_config,
ntohs(oldreq->request.vbucket),
(int)c->index);
} else {
idx = c->index;
}
if (idx == -1) {
lcb_log(LOGARGS(c, ERR), "no alternate server");
return 0;
}
lcb_log(LOGARGS(c, INFO), "Mapped key to new server %d -> %d",
c->index, idx);
now = gethrtime();
if (oldct->real_start) {
hrtime_t min_ok = now - MCSERVER_TIMEOUT(c) * 1000;
if (oldct->real_start < min_ok) {
/** Timed out in a 'natural' manner */
return 0;
}
}
req = *oldreq;
lcb_assert((lcb_size_t)idx < c->instance->nservers);
new_srv = c->instance->servers + idx;
nr = ringbuffer_read(&c->cmd_log, req.bytes, sizeof(req));
lcb_assert(nr == sizeof(req));
req.request.opaque = ++c->instance->seqno;
nbody = ntohl(req.request.bodylen);
body = malloc(nbody);
if (body == NULL) {
lcb_error_handler(c->instance, LCB_CLIENT_ENOMEM, NULL);
return -1;
}
nr = ringbuffer_read(&c->cmd_log, body, nbody);
lcb_assert(nr == nbody);
nr = ringbuffer_read(&c->output_cookies, &ct, sizeof(ct));
lcb_assert(nr == sizeof(ct));
/* Preserve the cookie and reset timestamp for the command. This
* means that the library will retry the command until it will
* get code different from LCB_NOT_MY_VBUCKET */
if (!ct.real_start) {
ct.real_start = ct.start;
}
ct.start = now;
lcb_server_retry_packet(new_srv, &ct, &req, sizeof(req));
/* FIXME dtrace instrumentation */
lcb_server_write_packet(new_srv, body, nbody);
lcb_server_end_packet(new_srv);
lcb_server_send_packets(new_srv);
free(body);
return 1;
}