* Use is subject to license terms.
*/
-#pragma ident "@(#)spa_boot.c 1.1 08/04/09 SMI"
+#pragma ident "%Z%%M% %I% %E% SMI"
#include <sys/spa.h>
#include <sys/sunddi.h>
char *
-spa_get_bootfs()
+spa_get_bootprop(char *propname)
{
- char *zfs_bp;
+ char *value;
if (ddi_prop_lookup_string(DDI_DEV_T_ANY, ddi_root_node(),
- DDI_PROP_DONTPASS, "zfs-bootfs", &zfs_bp) !=
- DDI_SUCCESS)
+ DDI_PROP_DONTPASS, propname, &value) != DDI_SUCCESS)
return (NULL);
- return (zfs_bp);
+ return (value);
}
void
-spa_free_bootfs(char *bootfs)
+spa_free_bootprop(char *value)
{
- ddi_prop_free(bootfs);
-}
-
-/*
- * Calculate how many device pathnames are in devpath_list.
- * The devpath_list could look like this:
- *
- * "/pci@1f,0/ide@d/disk@0,0:a /pci@1f,o/ide@d/disk@2,0:a"
- */
-static int
-spa_count_devpath(char *devpath_list)
-{
- int numpath;
- char *tmp_path, *blank;
-
- numpath = 0;
- tmp_path = devpath_list;
-
- /* skip leading blanks */
- while (*tmp_path == ' ')
- tmp_path++;
-
- while ((blank = strchr(tmp_path, ' ')) != NULL) {
-
- numpath++;
- /* skip contiguous blanks */
- while (*blank == ' ')
- blank++;
- tmp_path = blank;
- }
-
- if (strlen(tmp_path) > 0)
- numpath++;
-
- return (numpath);
-}
-
-/*
- * Only allow booting the device if it has the same vdev information as
- * the most recently updated vdev (highest txg) and is in a valid state.
- *
- * GRUB passes online/active device path names, e.g.
- * "/pci@1f,0/ide@d/disk@0,0:a /pci@1f,o/ide@d/disk@2,0:a"
- * to the kernel. The best vdev should have the same matching online/active
- * list as what GRUB passes in.
- */
-static int
-spa_check_devstate(char *devpath_list, char *dev, nvlist_t *conf)
-{
- nvlist_t *nvtop, **child;
- uint_t label_path, grub_path, c, children;
- char *type;
-
- VERIFY(nvlist_lookup_nvlist(conf, ZPOOL_CONFIG_VDEV_TREE,
- &nvtop) == 0);
- VERIFY(nvlist_lookup_string(nvtop, ZPOOL_CONFIG_TYPE, &type) == 0);
-
- if (strcmp(type, VDEV_TYPE_DISK) == 0)
- return (spa_rootdev_validate(nvtop)? 0 : EINVAL);
-
- ASSERT(strcmp(type, VDEV_TYPE_MIRROR) == 0);
-
- VERIFY(nvlist_lookup_nvlist_array(nvtop, ZPOOL_CONFIG_CHILDREN,
- &child, &children) == 0);
-
- /*
- * Check if the devpath_list is the same as the path list in conf.
- * If these two lists are different, then the booting device is not an
- * up-to-date device that can be booted.
- */
- label_path = 0;
- for (c = 0; c < children; c++) {
- char *physpath;
-
- if (nvlist_lookup_string(child[c], ZPOOL_CONFIG_PHYS_PATH,
- &physpath) != 0)
- return (EINVAL);
-
- if (spa_rootdev_validate(child[c])) {
- if (strstr(devpath_list, physpath) == NULL)
- return (EINVAL);
- label_path++;
- } else {
- char *blank;
-
- if (blank = strchr(dev, ' '))
- *blank = '\0';
- if (strcmp(physpath, dev) == 0)
- return (EINVAL);
- if (blank)
- *blank = ' ';
- }
- }
-
- grub_path = spa_count_devpath(devpath_list);
-
- if (label_path != grub_path)
- return (EINVAL);
-
- return (0);
-}
-
-/*
- * Given a list of vdev physpath names, pick the vdev with the most recent txg,
- * and return the point of the device's physpath in the list and the device's
- * label configuration. The content of the label would be the most recent
- * updated information.
- */
-int
-spa_get_rootconf(char *devpath_list, char **bestdev, nvlist_t **bestconf)
-{
- nvlist_t *conf = NULL;
- char *dev = NULL;
- uint64_t txg = 0;
- char *devpath, *blank;
-
- devpath = devpath_list;
- dev = devpath;
-
- while (devpath[0] == ' ')
- devpath++;
-
- while ((blank = strchr(devpath, ' ')) != NULL) {
- *blank = '\0';
- spa_check_rootconf(devpath, &dev, &conf, &txg);
- *blank = ' ';
-
- while (*blank == ' ')
- blank++;
- devpath = blank;
- }
-
- /* for the only or the last devpath in the devpath_list */
- if (strlen(devpath) > 0)
- spa_check_rootconf(devpath, &dev, &conf, &txg);
-
- if (conf == NULL)
- return (EINVAL);
-
- /*
- * dev/conf is the vdev with the most recent txg.
- * Check if the device is in a bootable state.
- * dev may have a trailing blank since it points to a string
- * in the devpath_list.
- */
- if (spa_check_devstate(devpath_list, dev, conf) != 0)
- return (EINVAL);
-
- *bestdev = dev;
- *bestconf = conf;
- return (0);
+ ddi_prop_free(value);
}