* particularly from a set of policy rules in mdadm.conf
*/
-static void pol_new(struct dev_policy **pol, char *name, char *val, char *metadata)
+static void pol_new(struct dev_policy **pol, char *name, const char *val,
+ const char *metadata)
{
struct dev_policy *n = malloc(sizeof(*n));
const char *real_metadata = NULL;
real_metadata = super1.name;
}
if (!real_metadata) {
- static char *prev = NULL;
+ static const char *prev = NULL;
if (prev != metadata) {
fprintf(stderr, Name ": metadata=%s unrecognised - ignoring rule\n",
metadata);
{
struct pol_rule *rules;
struct dev_policy *pol = NULL;
+ int i;
if (!type)
return NULL;
}
rules = rules->next;
}
+
+ /* Now add any metadata-specific internal knowledge
+ * about this path
+ */
+ for (i=0; superlist[i]; i++)
+ if (superlist[i]->get_disk_controller_domain) {
+ const char *d =
+ superlist[i]->get_disk_controller_domain(path);
+ if (d)
+ pol_new(&pol, pol_domain, d, superlist[i]->name);
+ }
+
pol_sort(&pol);
pol_dedup(pol);
return pol;
}
}
-static enum policy_action map_act(char *act)
+static enum policy_action map_act(const char *act)
{
if (strcmp(act, "include") == 0)
return act_include;
* As dev policies are already sorted, this is fairly easy to manage.
*/
-static struct domainlist **domain_merge_one(struct domainlist **domp, char *domain)
+static struct domainlist **domain_merge_one(struct domainlist **domp,
+ const char *domain)
{
/* merge a domain name into a sorted list and return the
* location of the insertion or match
return domp;
}
+#if (DEBUG)
+void dump_policy(struct dev_policy *policy)
+{
+ while (policy) {
+ dprintf("policy: %p name: %s value: %s metadata: %s\n",
+ policy,
+ policy->name,
+ policy->value,
+ policy->metadata);
+ policy = policy->next;
+ }
+}
+#endif
+
void domain_merge(struct domainlist **domp, struct dev_policy *pollist,
const char *metadata)
{
/* Check that all domains in pol (for metadata) are also in
* dom. Both lists are sorted.
* If pol has no domains, we don't really know about this device
- * so we reject the match.
+ * so we allow caller to choose:
+ * -1: has no domains
+ * 0: has domains, not all match
+ * 1: has domains, all match
*/
- int found_any = 0;
+ int found_any = -1;
struct dev_policy *p;
pol = pol_find(pol, pol_domain);
fclose(f);
return rv == 5;
}
+
+/* invocation of udev rule file */
+char udev_template_start[] =
+"# do not edit this file, it is automatically generated by mdadm\n"
+"\n";
+
+/* find rule named rule_type and return its value */
+char *find_rule(struct rule *rule, char *rule_type)
+{
+ while (rule) {
+ if (rule->name == rule_type)
+ return rule->value;
+
+ rule = rule->next;
+ }
+ return NULL;
+}
+
+#define UDEV_RULE_FORMAT \
+"ACTION==\"add\", SUBSYSTEM=\"block\", " \
+"ENV{DEVTYPE}==\"%s\", ENV{ID_PATH}==\"%s\", " \
+"RUN+=\"/sbin/mdadm --incremental $env{DEVNAME}\", "
+
+#define UDEV_RULE_FORMAT_NOTYPE \
+"ACTION==\"add\", SUBSYSTEM=\"block\", " \
+"ENV{ID_PATH}==\"%s\", " \
+"RUN+=\"/sbin/mdadm --incremental $env{DEVNAME}\", "
+
+/* Write rule in the rule file. Use format from UDEV_RULE_FORMAT */
+int write_rule(struct rule *rule, int fd, int force_part)
+{
+ char line[1024];
+ char *pth = find_rule(rule, rule_path);
+ char *typ = find_rule(rule, rule_type);
+ if (!pth)
+ return -1;
+
+ if (force_part)
+ typ = type_part;
+ if (typ)
+ snprintf(line, sizeof(line) - 1, UDEV_RULE_FORMAT, typ, pth);
+ else
+ snprintf(line, sizeof(line) - 1, UDEV_RULE_FORMAT_NOTYPE, pth);
+ return write(fd, line, strlen(line)) == (int)strlen(line);
+}
+
+/* Generate single entry in udev rule basing on POLICY line found in config
+ * file. Take only those with paths, only first occurrence if paths are equal
+ * and if actions supports handling of spares (>=act_spare_same_slot)
+ */
+int generate_entries(int fd)
+{
+ struct pol_rule *loop, *dup;
+ char *loop_value, *dup_value;
+ int duplicate;
+
+ for (loop = config_rules; loop; loop = loop->next) {
+ if (loop->type != rule_policy && loop->type != rule_part)
+ continue;
+ duplicate = 0;
+
+ /* only policies with paths and with actions supporting
+ * bare disks are considered */
+ loop_value = find_rule(loop->rule, pol_act);
+ if (!loop_value || map_act(loop_value) < act_spare_same_slot)
+ continue;
+ loop_value = find_rule(loop->rule, rule_path);
+ if (!loop_value)
+ continue;
+ for (dup = config_rules; dup != loop; dup = dup->next) {
+ if (dup->type != rule_policy && loop->type != rule_part)
+ continue;
+ dup_value = find_rule(dup->rule, pol_act);
+ if (!dup_value || map_act(dup_value) < act_spare_same_slot)
+ continue;
+ dup_value = find_rule(dup->rule, rule_path);
+ if (!dup_value)
+ continue;
+ if (strcmp(loop_value, dup_value) == 0) {
+ duplicate = 1;
+ break;
+ }
+ }
+
+ /* not a dup or first occurrence */
+ if (!duplicate)
+ if (!write_rule(loop->rule, fd, loop->type == rule_part) )
+ return 0;
+ }
+ return 1;
+}
+
+/* Write_rules routine creates dynamic udev rules used to handle
+ * hot-plug events for bare devices (and making them spares)
+ */
+int Write_rules(char *rule_name)
+{
+ int fd;
+ char udev_rule_file[PATH_MAX];
+
+ if (rule_name) {
+ strcpy(udev_rule_file, rule_name);
+ strcat(udev_rule_file, ".temp");
+ fd = creat(udev_rule_file,
+ S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
+ if (fd == -1)
+ return 1;
+ } else
+ fd = 1;
+
+ /* write static invocation */
+ if (write(fd, udev_template_start,
+ sizeof(udev_template_start) - 1)
+ != (int)sizeof(udev_template_start)-1)
+ goto abort;
+
+ /* iterate, if none created or error occurred, remove file */
+ if (generate_entries(fd) < 0)
+ goto abort;
+
+ fsync(fd);
+ if (rule_name) {
+ close(fd);
+ rename(udev_rule_file, rule_name);
+ }
+ return 0;
+abort:
+ if (rule_name) {
+ close(fd);
+ unlink(udev_rule_file);
+ }
+ return 1;
+}
projects / thirdparty / mdadm.git / blobdiff