#include "mdadm.h"
#include <dirent.h>
#include <ctype.h>
+#include "dlink.h"
#define MAX_SYSFS_PATH_LEN 120
+struct dev_sysfs_rule {
+ struct dev_sysfs_rule *next;
+ char *devname;
+ int uuid[4];
+ int uuid_set;
+ struct sysfs_entry {
+ struct sysfs_entry *next;
+ char *name;
+ char *value;
+ } *entry;
+};
+
int load_sys(char *path, char *buf, int len)
{
int fd = open(path, O_RDONLY);
dev->disk.raid_disk = strtoul(buf, &ep, 10);
if (*ep) dev->disk.raid_disk = -1;
+ sra->array.nr_disks++;
strcpy(dbase, "block/dev");
if (load_sys(fname, buf, sizeof(buf))) {
/* assume this is a stale reference to a hot
* removed device
*/
- free(dev);
- continue;
+ if (!(options & GET_DEVS_ALL)) {
+ free(dev);
+ continue;
+ }
+ } else {
+ sscanf(buf, "%d:%d", &dev->disk.major, &dev->disk.minor);
}
- sra->array.nr_disks++;
- sscanf(buf, "%d:%d", &dev->disk.major, &dev->disk.minor);
- /* special case check for block devices that can go 'offline' */
- strcpy(dbase, "block/device/state");
- if (load_sys(fname, buf, sizeof(buf)) == 0 &&
- strncmp(buf, "offline", 7) == 0) {
- free(dev);
- continue;
+ if (!(options & GET_DEVS_ALL)) {
+ /* special case check for block devices that can go 'offline' */
+ strcpy(dbase, "block/device/state");
+ if (load_sys(fname, buf, sizeof(buf)) == 0 &&
+ strncmp(buf, "offline", 7) == 0) {
+ free(dev);
+ continue;
+ }
}
/* finally add this disk to the array */
}
return n;
}
+
+int sysfs_rules_apply_check(const struct mdinfo *sra,
+ const struct sysfs_entry *ent)
+{
+ /* Check whether parameter is regular file,
+ * exists and is under specified directory.
+ */
+ char fname[MAX_SYSFS_PATH_LEN];
+ char dname[MAX_SYSFS_PATH_LEN];
+ char resolved_path[PATH_MAX];
+ char resolved_dir[PATH_MAX];
+ int result;
+
+ if (sra == NULL || ent == NULL)
+ return -1;
+
+ result = snprintf(dname, MAX_SYSFS_PATH_LEN,
+ "/sys/block/%s/md/", sra->sys_name);
+ if (result < 0 || result >= MAX_SYSFS_PATH_LEN)
+ return -1;
+
+ result = snprintf(fname, MAX_SYSFS_PATH_LEN,
+ "%s/%s", dname, ent->name);
+ if (result < 0 || result >= MAX_SYSFS_PATH_LEN)
+ return -1;
+
+ if (realpath(fname, resolved_path) == NULL ||
+ realpath(dname, resolved_dir) == NULL)
+ return -1;
+
+ if (strncmp(resolved_dir, resolved_path,
+ strnlen(resolved_dir, PATH_MAX)) != 0)
+ return -1;
+
+ return 0;
+}
+
+static struct dev_sysfs_rule *sysfs_rules;
+
+void sysfs_rules_apply(char *devnm, struct mdinfo *dev)
+{
+ struct dev_sysfs_rule *rules = sysfs_rules;
+
+ while (rules) {
+ struct sysfs_entry *ent = rules->entry;
+ int match = 0;
+
+ if (!rules->uuid_set) {
+ if (rules->devname)
+ match = strcmp(devnm, rules->devname) == 0;
+ } else {
+ match = memcmp(dev->uuid, rules->uuid,
+ sizeof(int[4])) == 0;
+ }
+
+ while (match && ent) {
+ if (sysfs_rules_apply_check(dev, ent) < 0)
+ pr_err("SYSFS: failed to write '%s' to '%s'\n",
+ ent->value, ent->name);
+ else
+ sysfs_set_str(dev, NULL, ent->name, ent->value);
+ ent = ent->next;
+ }
+ rules = rules->next;
+ }
+}
+
+static void sysfs_rule_free(struct dev_sysfs_rule *rule)
+{
+ struct sysfs_entry *entry;
+
+ while (rule) {
+ struct dev_sysfs_rule *tmp = rule->next;
+
+ entry = rule->entry;
+ while (entry) {
+ struct sysfs_entry *tmp = entry->next;
+
+ free(entry->name);
+ free(entry->value);
+ free(entry);
+ entry = tmp;
+ }
+
+ if (rule->devname)
+ free(rule->devname);
+ free(rule);
+ rule = tmp;
+ }
+}
+
+void sysfsline(char *line)
+{
+ struct dev_sysfs_rule *sr;
+ char *w;
+
+ sr = xcalloc(1, sizeof(*sr));
+ for (w = dl_next(line); w != line ; w = dl_next(w)) {
+ if (strncasecmp(w, "name=", 5) == 0) {
+ char *devname = w + 5;
+
+ if (strncmp(devname, "/dev/md/", 8) == 0) {
+ if (sr->devname)
+ pr_err("Only give one device per SYSFS line: %s\n",
+ devname);
+ else
+ sr->devname = xstrdup(devname);
+ } else {
+ pr_err("%s is an invalid name for an md device - ignored.\n",
+ devname);
+ }
+ } else if (strncasecmp(w, "uuid=", 5) == 0) {
+ char *uuid = w + 5;
+
+ if (sr->uuid_set) {
+ pr_err("Only give one uuid per SYSFS line: %s\n",
+ uuid);
+ } else {
+ if (parse_uuid(w + 5, sr->uuid) &&
+ memcmp(sr->uuid, uuid_zero,
+ sizeof(int[4])) != 0)
+ sr->uuid_set = 1;
+ else
+ pr_err("Invalid uuid: %s\n", uuid);
+ }
+ } else {
+ struct sysfs_entry *prop;
+
+ char *sep = strchr(w, '=');
+
+ if (sep == NULL || *(sep + 1) == 0) {
+ pr_err("Cannot parse \"%s\" - ignoring.\n", w);
+ continue;
+ }
+
+ prop = xmalloc(sizeof(*prop));
+ prop->value = xstrdup(sep + 1);
+ *sep = 0;
+ prop->name = xstrdup(w);
+ prop->next = sr->entry;
+ sr->entry = prop;
+ }
+ }
+
+ if (!sr->devname && !sr->uuid_set) {
+ pr_err("Device name not found in sysfs config entry - ignoring.\n");
+ sysfs_rule_free(sr);
+ return;
+ }
+
+ sr->next = sysfs_rules;
+ sysfs_rules = sr;
+}
projects / thirdparty / mdadm.git / blobdiff