/*
* Create a default iface for offload cards. We assume that we will
* be able identify each host by MAC.
*/
void iface_setup_host_bindings(void)
{
int nr_found = 0;
if (idbm_lock())
return;
if (access(IFACE_CONFIG_DIR, F_OK) != 0) {
if (mkdir(IFACE_CONFIG_DIR, 0660) != 0) {
log_error("Could not make %s. HW/OFFLOAD iscsi "
"may not be supported", IFACE_CONFIG_DIR);
idbm_unlock();
return;
}
}
idbm_unlock();
transport_probe_for_offload();
if (iscsi_sysfs_for_each_host(NULL, &nr_found,
__iface_setup_host_bindings))
log_error("Could not scan scsi hosts. HW/OFFLOAD iscsi "
"operations may not be supported, or please "
"see README for instructions on setting up ifaces.");
}
int iface_conf_delete(struct iface_rec *iface)
{
struct iface_rec *def_iface;
char *iface_conf;
int rc = 0;
def_iface = iface_match_default(iface);
if (def_iface) {
log_error("iface %s is a special interface and "
"cannot be deleted.\n", iface->name);
return ISCSI_ERR_INVAL;
}
iface_conf = calloc(1, PATH_MAX);
if (!iface_conf)
return ISCSI_ERR_NOMEM;
sprintf(iface_conf, "%s/%s", IFACE_CONFIG_DIR, iface->name);
rc = idbm_lock();
if (rc)
goto free_conf;
if (unlink(iface_conf))
rc = ISCSI_ERR_IDBM;
idbm_unlock();
free_conf:
free(iface_conf);
return rc;
}
int iface_conf_read(struct iface_rec *iface)
{
struct iface_rec *def_iface;
int rc, retry = 0;
def_iface = iface_match_default(iface);
if (def_iface) {
/*
* older tools allowed default to have different
* transport_names so we do not want to overwrite
* it.
*/
if (!strcmp(def_iface->name, DEFAULT_IFACENAME)) {
if (!strlen(iface->name))
strcpy(iface->name, def_iface->name);
if (!strlen(iface->netdev))
strcpy(iface->netdev, def_iface->netdev);
if (!strlen(iface->hwaddress))
strcpy(iface->hwaddress, def_iface->hwaddress);
if (!strlen(iface->transport_name))
strcpy(iface->transport_name,
def_iface->transport_name);
if (!strlen(iface->iname))
strcpy(iface->iname, def_iface->iname);
} else {
iface_init(iface);
iface_copy(iface, def_iface);
}
return 0;
}
retry_read:
rc = idbm_lock();
if (rc)
return rc;
rc = __iface_conf_read(iface);
idbm_unlock();
/*
* cmd was run before running -m iface, so force def bindings
* creation to see if that was the one requested
*/
if (retry < 1 && rc == ISCSI_ERR_IDBM) {
iface_setup_host_bindings();
retry++;
goto retry_read;
}
return rc;
}
int iface_conf_write(struct iface_rec *iface)
{
struct iface_rec *def_iface;
char *iface_conf;
FILE *f;
int rc = 0;
def_iface = iface_match_default(iface);
if (def_iface) {
log_error("iface %s is a special interface and "
"is not stored in %s.\n", iface->name,
IFACE_CONFIG_DIR);
return ISCSI_ERR_INVAL;
}
iface_conf = calloc(1, PATH_MAX);
if (!iface_conf)
return ISCSI_ERR_NOMEM;
sprintf(iface_conf, "%s/%s", IFACE_CONFIG_DIR, iface->name);
f = fopen(iface_conf, "w");
if (!f) {
rc = ISCSI_ERR_IDBM;
goto free_conf;
}
rc = idbm_lock();
if (rc)
goto close_f;
idbm_print(IDBM_PRINT_TYPE_IFACE, iface, 1, f);
idbm_unlock();
close_f:
fclose(f);
free_conf:
free(iface_conf);
return rc;
}
int iface_conf_read(struct iface_rec *iface)
{
struct iface_rec *def_iface;
int rc;
def_iface = iface_match_default(iface);
if (def_iface) {
/*
* older tools allowed default to have different
* transport_names so we do not want to overwrite
* it.
*/
if (!strcmp(def_iface->name, DEFAULT_IFACENAME)) {
if (!strlen(iface->name))
strcpy(iface->name, def_iface->name);
if (!strlen(iface->netdev))
strcpy(iface->netdev, def_iface->netdev);
if (!strlen(iface->hwaddress))
strcpy(iface->hwaddress, def_iface->hwaddress);
if (!strlen(iface->transport_name))
strcpy(iface->transport_name,
def_iface->transport_name);
if (!strlen(iface->iname))
strcpy(iface->iname, def_iface->iname);
} else {
iface_init(iface);
iface_copy(iface, def_iface);
}
return 0;
}
rc = idbm_lock();
if (rc)
return rc;
rc = __iface_conf_read(iface);
idbm_unlock();
return rc;
}
int iface_for_each_iface(void *data, int skip_def, int *nr_found,
iface_op_fn *fn)
{
DIR *iface_dirfd;
struct dirent *iface_dent;
struct iface_rec *iface, *def_iface;
int err = 0, i = 0;
if (!skip_def) {
while ((def_iface = default_ifaces[i++])) {
iface = iface_alloc(def_iface->name, &err);
if (!iface) {
log_error("Could not add iface %s.",
def_iface->name);
continue;
}
iface_copy(iface, def_iface);
err = fn(data, iface);
free(iface);
if (err)
return err;
(*nr_found)++;
}
}
iface_dirfd = opendir(IFACE_CONFIG_DIR);
if (!iface_dirfd)
return errno;
while ((iface_dent = readdir(iface_dirfd))) {
if (!strcmp(iface_dent->d_name, ".") ||
!strcmp(iface_dent->d_name, ".."))
continue;
log_debug(5, "iface_for_each_iface found %s",
iface_dent->d_name);
iface = iface_alloc(iface_dent->d_name, &err);
if (!iface || err) {
if (err == ISCSI_ERR_INVAL)
log_error("Invalid iface name %s. Must be "
"from 1 to %d characters.",
iface_dent->d_name,
ISCSI_MAX_IFACE_LEN - 1);
else
log_error("Could not add iface %s.",
iface_dent->d_name);
continue;
}
err = idbm_lock();
if (err) {
free(iface);
continue;
}
err = __iface_conf_read(iface);
idbm_unlock();
if (err) {
log_error("Could not read def iface %s (err %d)",
iface->name, err);
free(iface);
continue;
}
if (!iface_is_valid(iface)) {
log_debug(5, "iface is not valid "
"Iface settings " iface_fmt,
iface_str(iface));
free(iface);
continue;
}
err = fn(data, iface);
free(iface);
if (err)
break;
(*nr_found)++;
}
closedir(iface_dirfd);
return err;
}
