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memcached.c
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#include "memcached.h"
/**
* memcached.c: this code interacts with MEMCACHED server.
* Part of the code borrows the ideas from libhrd -
* https://github.com/efficient/rdma_bench/tree/master/libhrd
*/
__thread memcached_st *memc = NULL;
/**
* memcached_create_memc - create memcached contextn
*/
memcached_st *memcached_create_memc(void) {
memcached_server_st *servers = NULL;
memcached_st *memc = memcached_create(NULL);
memcached_return rc;
memc = memcached_create(NULL);
char *registry_ip = MEMCACHED_IP;
/* We run the memcached server on the default memcached port */
servers = memcached_server_list_append(servers, registry_ip,
MEMCACHED_DEFAULT_PORT, &rc);
rc = memcached_server_push(memc, servers);
CPE(rc != MEMCACHED_SUCCESS, "Couldn't add memcached server.\n", -1);
return memc;
}
/**
* memcached_publish - publish memcached entry
* @key: key
* @value: value
* @len: size of the value
*/
void memcached_publish(const char *key, void *value, int len) {
assert(key != NULL && value != NULL && len > 0);
memcached_return rc;
if (memc == NULL) {
memc = memcached_create_memc();
}
rc = memcached_set(memc, key, strlen(key), (const char *)value, len,
(time_t)0, (uint32_t)0);
if (rc != MEMCACHED_SUCCESS) {
char *registry_ip = MEMCACHED_IP;
fprintf(stderr,
"Failed to publish key %s. Error %s. "
"Reg IP = %s\n",
key, memcached_strerror(memc, rc), registry_ip);
exit(-1);
}
}
/**
* memcached_publish_rcqp - publish queue pair information
* @inf: RDMA context
* @num: index
* @qp_name: key - name of this qp
*/
void memcached_publish_rcqp(struct ib_inf *inf, int num, const char *qp_name) {
assert(inf != NULL);
assert(num >= 0 && num < inf->num_local_rcqps);
assert(qp_name != NULL && strlen(qp_name) < RSEC_MAX_QP_NAME - 1);
assert(strstr(qp_name, RSEC_RESERVED_NAME_PREFIX) == NULL);
int len = strlen(qp_name);
int i;
for (i = 0; i < len; i++) {
if (qp_name[i] == ' ') {
fprintf(stderr, "Space not allowed in QP name\n");
exit(-1);
}
}
struct ib_qp_attr qp_attr;
memcpy(qp_attr.name, qp_name, len);
qp_attr.name[len] = 0; /* Add the null terminator */
// qp_attr.buf_addr = (uint64_t)inf->rcqp_buf[num];
// qp_attr.rkey = (uint32_t)inf->rcqp_buf_mr[num]->rkey;
qp_attr.lid =
ib_get_local_lid(inf->conn_qp[num]->context, inf->dev_port_id);
qp_attr.qpn = inf->conn_qp[num]->qp_num;
qp_attr.sl = RSEC_RC_SL;
if (RSEC_NETWORK_MODE == RSEC_NETWORK_ROCE) {
qp_attr.remote_gid = inf->local_gid;
}
// printf("rc_publish: %d %s %d %d %lu %lu\n",
// num, qp_name, qp_attr.lid, qp_attr.qpn, qp_attr.buf_addr,
// qp_attr.rkey);
memcached_publish(qp_attr.name, &qp_attr, sizeof(struct ib_qp_attr));
}
/**
* memcached_publish_attackqp - publish queue pair information
* @inf: RDMA context
* @num: index
* @qp_name: key - name of this qp (use different key-prefix with regular qp)
*/
void memcached_publish_attackqp(struct ib_inf *inf, int num,
const char *qp_name) {
assert(inf != NULL);
assert(num >= 0 && num < inf->num_attack_rcqps);
assert(qp_name != NULL && strlen(qp_name) < RSEC_MAX_QP_NAME - 1);
assert(strstr(qp_name, RSEC_RESERVED_NAME_PREFIX) == NULL);
int len = strlen(qp_name);
int i;
for (i = 0; i < len; i++) {
if (qp_name[i] == ' ') {
fprintf(stderr, "Space not allowed in QP name\n");
exit(-1);
}
}
struct ib_qp_attr qp_attr;
memcpy(qp_attr.name, qp_name, len);
qp_attr.name[len] = 0; /* Add the null terminator */
qp_attr.lid =
ib_get_local_lid(inf->attack_qp[num]->context, inf->dev_port_id);
qp_attr.qpn = inf->attack_qp[num]->qp_num;
qp_attr.sl = RSEC_RC_SL;
if (RSEC_NETWORK_MODE == RSEC_NETWORK_ROCE) {
qp_attr.remote_gid = inf->local_gid;
}
memcached_publish(qp_attr.name, &qp_attr, sizeof(struct ib_qp_attr));
}
/**
* memcached_publish_udqp - publish UD queue pair information
* @inf: RDMA context
* @num: index
* @qp_name: key - name of this qp (use different key-prefix with regular qp)
*/
void memcached_publish_udqp(struct ib_inf *inf, int num, const char *qp_name) {
assert(inf != NULL);
assert(num >= 0 && num < inf->num_local_udqps);
assert(qp_name != NULL && strlen(qp_name) < RSEC_MAX_QP_NAME - 1);
assert(strstr(qp_name, RSEC_RESERVED_NAME_PREFIX) == NULL);
int len = strlen(qp_name);
int i;
for (i = 0; i < len; i++) {
if (qp_name[i] == ' ') {
fprintf(stderr, "Space not allowed in QP name\n");
exit(-1);
}
}
struct ib_qp_attr qp_attr;
memcpy(qp_attr.name, qp_name, len);
qp_attr.name[len] = 0; /* Add the null terminator */
qp_attr.lid =
ib_get_local_lid(inf->dgram_qp[num]->context, inf->dev_port_id);
qp_attr.qpn = inf->dgram_qp[num]->qp_num;
qp_attr.sl = RSEC_UD_SL;
memcached_publish(qp_attr.name, &qp_attr, sizeof(struct ib_qp_attr));
}
/**
* memcached_get_published - get value based on key
* @key: key
* @value: return addr
*/
int memcached_get_published(const char *key, void **value) {
assert(key != NULL);
if (memc == NULL) {
memc = memcached_create_memc();
}
memcached_return rc;
size_t value_length;
uint32_t flags;
*value = memcached_get(memc, key, strlen(key), &value_length, &flags, &rc);
if (rc == MEMCACHED_SUCCESS) {
return (int)value_length;
} else if (rc == MEMCACHED_NOTFOUND) {
assert(*value == NULL);
return -1;
} else {
char *registry_ip = MEMCACHED_IP;
fprintf(stderr,
"Error finding value for key \"%s\": %s. "
"Reg IP = %s\n",
key, memcached_strerror(memc, rc), registry_ip);
exit(-1);
}
/* Never reached */
assert(false);
}
/**
* memcached_get_published_qp - get QP information based on key
* @qp_name: key
*/
struct ib_qp_attr *memcached_get_published_qp(const char *qp_name) {
struct ib_qp_attr *ret;
assert(qp_name != NULL && strlen(qp_name) < RSEC_MAX_QP_NAME - 1);
assert(strstr(qp_name, RSEC_RESERVED_NAME_PREFIX) == NULL);
int len = strlen(qp_name);
int i;
int ret_len;
for (i = 0; i < len; i++) {
if (qp_name[i] == ' ') {
fprintf(stderr, "Space not allowed in QP name\n");
exit(-1);
}
}
do {
ret_len = memcached_get_published(qp_name, (void **)&ret);
} while (ret_len <= 0);
/*
* The registry lookup returns only if we get a unique QP for @qp_name, or
* if the memcached lookup succeeds but we don't have an entry for @qp_name.
*/
assert(ret_len == sizeof(struct ib_qp_attr) || ret_len == -1);
return ret;
}
/**
* memcached_get_published_mr - get MR information based on key
* @mr_name: key
*/
struct ib_mr_attr *memcached_get_published_mr(const char *mr_name) {
struct ib_mr_attr *ret;
assert(mr_name != NULL && strlen(mr_name) < RSEC_MAX_QP_NAME - 1);
assert(strstr(mr_name, RSEC_RESERVED_NAME_PREFIX) == NULL);
int len = strlen(mr_name);
int i;
int ret_len;
for (i = 0; i < len; i++) {
if (mr_name[i] == ' ') {
fprintf(stderr, "Space not allowed in QP name\n");
exit(-1);
}
}
do {
ret_len = memcached_get_published(mr_name, (void **)&ret);
} while (ret_len <= 0);
/*
* The registry lookup returns only if we get a unique QP for @qp_name, or
* if the memcached lookup succeeds but we don't have an entry for @qp_name.
*/
assert(ret_len == sizeof(struct ib_mr_attr) || ret_len == -1);
return ret;
}
/**
* memcached_get_published_size - get entry based on key and check size
* @tar_name: key
* @size: target size
*/
void *memcached_get_published_size(const char *tar_name, int size) {
void *ret;
assert(tar_name != NULL && strlen(tar_name) < RSEC_MAX_QP_NAME - 1);
assert(strstr(tar_name, RSEC_RESERVED_NAME_PREFIX) == NULL);
int len = strlen(tar_name);
int i;
int ret_len;
for (i = 0; i < len; i++) {
if (tar_name[i] == ' ') {
fprintf(stderr, "Space not allowed in QP name\n");
exit(-1);
}
}
do {
ret_len = memcached_get_published(tar_name, (void **)&ret);
} while (ret_len <= 0);
/*
* The registry lookup returns only if we get a unique QP for @qp_name, or
* if the memcached lookup succeeds but we don't have an entry for @qp_name.
*/
assert(ret_len == size || ret_len == -1);
return ret;
}