/*
* dapls_create_gid_map()
*
* Read /usr/local/etc/ibhosts to obtain host names and GIDs.
* Create a table containing IP addresses and GIDs which can
* be used for lookups.
*
* This implementation is a simple method providing name services
* when more advanced mechanisms do not exist. The proper way
* to obtain these mappings is to use a name service such as is
* provided by IPoIB on InfiniBand.
*
* Input:
* device_name Name of device as reported by the provider
*
* Output:
* none
*
* Returns:
* char * to string number
*/
DAT_RETURN
dapli_ns_create_gid_map(void)
{
FILE *f;
ib_gid_t gid;
char hostname[128];
int rc;
struct addrinfo *addr;
struct sockaddr_in *si;
DAPL_GID_MAP gmt;
f = fopen(MAP_FILE, "r");
if (f == NULL) {
dapl_dbg_log(DAPL_DBG_TYPE_ERR, "ERROR: Must have file <%s> "
"for IP/GID mappings\n", MAP_FILE);
return (DAT_ERROR(DAT_INTERNAL_ERROR, 0));
}
rc = fscanf(f, "%s " F64x " " F64x, hostname,
&gid.gid_prefix, &gid.gid_guid);
while (rc != EOF) {
rc = dapls_osd_getaddrinfo(hostname, &addr);
if (rc != 0) {
/*
* hostname not registered in DNS,
* provide a dummy value
*/
dapl_dbg_log(DAPL_DBG_TYPE_ERR,
"WARNING: <%s> not registered in "
"DNS, using dummy IP value\n", hostname);
gmt.ip_address = 0x01020304;
} else {
/*
* Load into the ip/gid mapping table
*/
si = (struct sockaddr_in *)addr->ai_addr;
if (AF_INET == addr->ai_addr->sa_family) {
gmt.ip_address = si->sin_addr.s_addr;
} else {
dapl_dbg_log(DAPL_DBG_TYPE_ERR,
"WARNING: <%s> Address family "
"not supported, using dummy "
"IP value\n", hostname);
gmt.ip_address = 0x01020304;
}
dapls_osd_freeaddrinfo(addr);
}
gmt.gid.gid_prefix = gid.gid_prefix;
gmt.gid.gid_guid = gid.gid_guid;
dapli_ns_add_address(&gmt);
rc = fscanf(f, "%s " F64x " " F64x, hostname,
&gid.gid_prefix, &gid.gid_guid);
}
(void) fclose(f);
return (DAT_SUCCESS);
}
/*
* dapli_assign_hca_ip_address
*
* Obtain the IP address of the passed in name, which represents a
* port on the hca. There are three methods here to obtain the
* appropriate IP address, each with their own shortcoming:
* 1) IPOIB_NAMING. Requires the implementation of the IPoIB
* interface defined in include/dapl/ipoib_names.h. This is
* not the recommended interface as IPoIB is limited at
* the point we need to obtain an IP address on the
* passive side of a connection. The code supporting this
* implementation has been removed.
*
* 2) IBHOSTS. An entry exists in DNS and in the /etc/dapl/ibhosts
* file. The immediate drawback here is that we must dictate
* how to name the interface, which is a stated DAPL non-goal.
* In the broader perspective, this method requires us to xmit
* the IP address in the private data of a connection, which has
* other fun problems. This is the default method and is known to
* work, but it has problems.
*
* 3) Obtain the IP address from the driver, which has registered
* the address with the SA for retrieval.
*
*
* Input:
* hca_ptr Pointer to HCA structure
* device_name Name of device as reported by the provider
*
* Output:
* none
*
* Returns:
* char * to string number
*/
void dapli_assign_hca_ip_address(DAPL_HCA * hca_ptr, char *device_name)
{
char *adapter_num;
#define NAMELEN 128
struct addrinfo *addr;
char hostname[NAMELEN];
char *str;
int rc;
/*
* Obtain the IP address of the adapter. This is a simple
* scheme that creates a name that must appear available to
* DNS, e.g. it must be in the local site DNS or in the local
* /etc/hosts file, etc.
*
* <hostname>-ib<index>
*
* This scheme obviously doesn't work with adapters from
* multiple vendors, but will suffice in common installations.
*/
rc = gethostname(hostname, NAMELEN);
/* guarantee NUL termination if hostname gets truncated */
hostname[NAMELEN - 1] = '\0';
/*
* Strip off domain info if it exists (e.g. mynode.mydomain.com)
*/
for (str = hostname; *str && *str != '.';) {
str++;
}
if (*str == '.') {
*str = '\0';
}
strcat(hostname, "-ib");
adapter_num = dapli_get_adapter_num(device_name);
strcat(hostname, adapter_num);
rc = dapls_osd_getaddrinfo(hostname, &addr);
if (rc != 0) {
/* Not registered in DNS, provide a dummy value */
dapli_setup_dummy_addr(hca_ptr, hostname);
} else {
hca_ptr->hca_address = *((DAT_SOCK_ADDR6 *) addr->ai_addr);
dapls_osd_freeaddrinfo(addr);
}
}
