struct rte_cfgfile *
rte_cfgfile_load(const char *filename, int flags)
{
int allocated_sections = CFG_ALLOC_SECTION_BATCH;
int allocated_entries = 0;
int curr_section = -1;
int curr_entry = -1;
char buffer[256] = {0};
int lineno = 0;
struct rte_cfgfile *cfg = NULL;
FILE *f = fopen(filename, "r");
if (f == NULL)
return NULL;
cfg = malloc(sizeof(*cfg) + sizeof(cfg->sections[0]) *
allocated_sections);
if (cfg == NULL)
goto error2;
memset(cfg->sections, 0, sizeof(cfg->sections[0]) * allocated_sections);
while (fgets(buffer, sizeof(buffer), f) != NULL) {
char *pos = NULL;
size_t len = strnlen(buffer, sizeof(buffer));
lineno++;
if ((len >= sizeof(buffer) - 1) && (buffer[len-1] != '\n')) {
printf("Error line %d - no \\n found on string. "
"Check if line too long\n", lineno);
goto error1;
}
pos = memchr(buffer, ';', sizeof(buffer));
if (pos != NULL) {
*pos = '\0';
len = pos - buffer;
}
len = _strip(buffer, len);
if (buffer[0] != '[' && memchr(buffer, '=', len) == NULL)
continue;
if (buffer[0] == '[') {
/* section heading line */
char *end = memchr(buffer, ']', len);
if (end == NULL) {
printf("Error line %d - no terminating '['"
"character found\n", lineno);
goto error1;
}
*end = '\0';
_strip(&buffer[1], end - &buffer[1]);
/* close off old section and add start new one */
if (curr_section >= 0)
cfg->sections[curr_section]->num_entries =
curr_entry + 1;
curr_section++;
/* resize overall struct if we don't have room for more
sections */
if (curr_section == allocated_sections) {
allocated_sections += CFG_ALLOC_SECTION_BATCH;
struct rte_cfgfile *n_cfg = realloc(cfg,
sizeof(*cfg) + sizeof(cfg->sections[0])
* allocated_sections);
if (n_cfg == NULL) {
printf("Error - no more memory\n");
goto error1;
}
cfg = n_cfg;
}
/* allocate space for new section */
allocated_entries = CFG_ALLOC_ENTRY_BATCH;
curr_entry = -1;
cfg->sections[curr_section] = malloc(
sizeof(*cfg->sections[0]) +
sizeof(cfg->sections[0]->entries[0]) *
allocated_entries);
if (cfg->sections[curr_section] == NULL) {
printf("Error - no more memory\n");
goto error1;
}
snprintf(cfg->sections[curr_section]->name,
sizeof(cfg->sections[0]->name),
"%s", &buffer[1]);
} else {
/* value line */
if (curr_section < 0) {
printf("Error line %d - value outside of"
"section\n", lineno);
goto error1;
}
struct rte_cfgfile_section *sect =
cfg->sections[curr_section];
char *split[2];
if (rte_strsplit(buffer, sizeof(buffer), split, 2, '=')
!= 2) {
printf("Error at line %d - cannot split "
"string\n", lineno);
goto error1;
}
curr_entry++;
if (curr_entry == allocated_entries) {
allocated_entries += CFG_ALLOC_ENTRY_BATCH;
struct rte_cfgfile_section *n_sect = realloc(
sect, sizeof(*sect) +
sizeof(sect->entries[0]) *
allocated_entries);
if (n_sect == NULL) {
printf("Error - no more memory\n");
goto error1;
}
sect = cfg->sections[curr_section] = n_sect;
}
sect->entries[curr_entry] = malloc(
sizeof(*sect->entries[0]));
if (sect->entries[curr_entry] == NULL) {
printf("Error - no more memory\n");
goto error1;
}
struct rte_cfgfile_entry *entry = sect->entries[
curr_entry];
snprintf(entry->name, sizeof(entry->name), "%s",
split[0]);
snprintf(entry->value, sizeof(entry->value), "%s",
split[1]);
_strip(entry->name, strnlen(entry->name,
sizeof(entry->name)));
_strip(entry->value, strnlen(entry->value,
sizeof(entry->value)));
}
}
fclose(f);
cfg->flags = flags;
cfg->num_sections = curr_section + 1;
/* curr_section will still be -1 if we have an empty file */
if (curr_section >= 0)
cfg->sections[curr_section]->num_entries = curr_entry + 1;
return cfg;
error1:
rte_cfgfile_close(cfg);
error2:
fclose(f);
return NULL;
}
static int
app_install_cfgfile(const char *file_name)
{
struct rte_cfgfile *file;
uint32_t n_cores, i;
memset(app.cores, 0, sizeof(app.cores));
if (file_name[0] == '\0')
return -1;
file = rte_cfgfile_load(file_name, 0);
if (file == NULL) {
rte_panic("Config file %s not found\n", file_name);
return -1;
}
n_cores = (uint32_t) rte_cfgfile_num_sections(file, "core",
strnlen("core", 5));
if (n_cores < app.n_cores) {
rte_panic("Config file parse error: not enough cores specified "
"(%u cores missing)\n", app.n_cores - n_cores);
return -1;
}
if (n_cores > app.n_cores) {
rte_panic("Config file parse error: too many cores specified "
"(%u cores too many)\n", n_cores - app.n_cores);
return -1;
}
for (i = 0; i < n_cores; i++) {
struct app_core_params *p = &app.cores[i];
char section_name[16];
const char *entry;
uint32_t j;
/* [core X] */
snprintf(section_name, sizeof(section_name), "core %u", i);
if (!rte_cfgfile_has_section(file, section_name)) {
rte_panic("Config file parse error: core IDs are not "
"sequential (core %u missing)\n", i);
return -1;
}
/* type */
entry = rte_cfgfile_get_entry(file, section_name, "type");
if (!entry) {
rte_panic("Config file parse error: core %u type not "
"defined\n", i);
return -1;
}
if ((app_core_type_string_to_id(entry, &p->core_type) != 0) ||
(p->core_type == APP_CORE_NONE)) {
rte_panic("Config file parse error: core %u type "
"error\n", i);
return -1;
}
/* queues in */
entry = rte_cfgfile_get_entry(file, section_name, "queues in");
if (!entry) {
rte_panic("Config file parse error: core %u queues in "
"not defined\n", i);
return -1;
}
for (j = 0; (j < APP_MAX_SWQ_PER_CORE) && (entry != NULL);
j++) {
char *next;
p->swq_in[j] = (uint32_t) strtol(entry, &next, 10);
if (next == entry)
break;
entry = next;
}
if ((j != APP_MAX_SWQ_PER_CORE) || (*entry != '\0')) {
rte_panic("Config file parse error: core %u queues in "
"error\n", i);
return -1;
}
/* queues out */
entry = rte_cfgfile_get_entry(file, section_name, "queues out");
if (!entry) {
rte_panic("Config file parse error: core %u queues out "
"not defined\n", i);
return -1;
}
for (j = 0; (j < APP_MAX_SWQ_PER_CORE) && (entry != NULL);
j++) {
char *next;
p->swq_out[j] = (uint32_t) strtol(entry, &next, 10);
if (next == entry)
break;
entry = next;
}
if ((j != APP_MAX_SWQ_PER_CORE) || (*entry != '\0')) {
rte_panic("Config file parse error: core %u queues out "
"error\n", i);
return -1;
}
}
rte_cfgfile_close(file);
return 0;
}
