/*
* Lookup uname/gname from uid/gid, return NULL if no match.
*/
static const char *
lookup_name(struct cpio *cpio, struct name_cache **name_cache_variable,
int (*lookup_fn)(struct cpio *, const char **, id_t), id_t id)
{
char asnum[16];
struct name_cache *cache;
const char *name;
int slot;
if (*name_cache_variable == NULL) {
*name_cache_variable = malloc(sizeof(struct name_cache));
if (*name_cache_variable == NULL)
lafe_errc(1, ENOMEM, "No more memory");
memset(*name_cache_variable, 0, sizeof(struct name_cache));
(*name_cache_variable)->size = name_cache_size;
}
cache = *name_cache_variable;
cache->probes++;
slot = id % cache->size;
if (cache->cache[slot].name != NULL) {
if (cache->cache[slot].id == id) {
cache->hits++;
return (cache->cache[slot].name);
}
free(cache->cache[slot].name);
cache->cache[slot].name = NULL;
}
if (lookup_fn(cpio, &name, id) == 0) {
if (name == NULL || name[0] == '\0') {
/* If lookup failed, format it as a number. */
snprintf(asnum, sizeof(asnum), "%u", (unsigned)id);
name = asnum;
}
cache->cache[slot].name = strdup(name);
if (cache->cache[slot].name != NULL) {
cache->cache[slot].id = id;
return (cache->cache[slot].name);
}
/*
* Conveniently, NULL marks an empty slot, so
* if the strdup() fails, we've just failed to
* cache it. No recovery necessary.
*/
}
return (NULL);
}
static int lustre_yaml_cb_helper(char *f, struct lookup_cmd_hdlr_tbl *table,
struct cYAML **show_rc, struct cYAML **err_rc)
{
struct cYAML *tree, *item = NULL, *head, *child;
cmd_handler_t cb;
char err_str[LNET_MAX_STR_LEN];
int rc = LUSTRE_CFG_RC_NO_ERR, return_rc = LUSTRE_CFG_RC_NO_ERR;
tree = cYAML_build_tree(f, NULL, 0, err_rc);
if (tree == NULL)
return LUSTRE_CFG_RC_BAD_PARAM;
child = tree->cy_child;
while (child != NULL) {
cb = lookup_fn(child->cy_string, table);
if (cb == NULL) {
snprintf(err_str, sizeof(err_str),
"\"call back for '%s' not found\"",
child->cy_string);
cYAML_build_error(LUSTRE_CFG_RC_BAD_PARAM, -1,
"yaml", "helper", err_str, err_rc);
goto out;
}
if (cYAML_is_sequence(child)) {
while ((head = cYAML_get_next_seq_item(child, &item))
!= NULL) {
rc = cb(head, show_rc, err_rc);
if (rc != LUSTRE_CFG_RC_NO_ERR)
return_rc = rc;
}
} else {
rc = cb(child, show_rc, err_rc);
if (rc != LUSTRE_CFG_RC_NO_ERR)
return_rc = rc;
}
item = NULL;
child = child->cy_next;
}
out:
cYAML_free_tree(tree);
return return_rc;
}
