libsa/zfs/zfsimpl.c

60  * For plain (non-mirror) top-level vdevs (i.e. is_vdev is not a mirror),
61  * ic_vdev is the same as is_vdev.  However, for mirror top-level vdevs,
62  * ic_vdev is a child of the mirror.
79 	 * is_split_offset is the offset into the i/o.
80 	 * This is the sum of the previous splits' is_size's.
90 	 * is_good_child is the child that we are currently using to
99  * The indirect_vsd_t is associated with each i/o to the indirect vdev.
100  * It is the "Vdev-Specific Data" in the zio_t's io_vsd.
339  *     1. The offset is "less than" the mapping entry; meaning the
340  *        offset is less than the source offset of the mapping entry. In
341  *        this case, there is no overlap between the offset and the
344  *     2. The offset is "greater than" the mapping entry; meaning the
345  *        offset is greater than the mapping entry's source offset plus
346  *        the entry's size. In this case, there is no overlap between
349  *        NOTE: If the offset is actually equal to the entry's offset
350  *        plus size, this is considered to be "greater" than the entry,
355  *     3. The last case to consider is if the offset actually falls
356  *        within the mapping entry's range. If this is the case, the
357  *        offset is considered to be "equal to" the mapping entry and
360  *        NOTE: If the offset is equal to the entry's source offset,
361  *        this case applies and 0 will be returned. If the offset is
444  * If the offset is not found in the table and "next_if_missing" is
445  * B_FALSE, then NULL will always be returned. The behavior is intended
449  * If the offset is not found in the table and "next_if_missing" is
451  * such that the entry's source offset is greater than the offset
452  * passed in (i.e. the "next" mapping entry in the table is returned, if
453  * the offset is missing from the table). If there are no entries whose
454  * source offset is greater than the passed in offset, NULL is returned.
497  * is populated with the number of mapping entries that were duplicated.
499  * Finally, since we are doing an allocation, it is up to the caller to
553  * This is a callback for vdev_indirect_remap() which allocates an
570 	indirect_split_t *is =
572 	if (is == NULL) {
576 	bzero(is, offsetof(indirect_split_t, is_child[n]));
578 	is->is_children = n;
579 	is->is_size = size;
580 	is->is_split_offset = split_offset;
581 	is->is_target_offset = offset;
582 	is->is_vdev = vd;
595 			is->is_child[i++].ic_vdev = kid;
598 		is->is_child[0].ic_vdev = vd;
601 	list_insert_tail(&iv->iv_splits, is);
684 	indirect_split_t *is;
686 	while ((is = list_head(&iv->iv_splits)) != NULL) {
687 		for (int c = 0; c < is->is_children; c++) {
688 			indirect_child_t *ic = &is->is_child[c];
691 		list_remove(&iv->iv_splits, is);
692 		free(is);
738 		 * This is not a split block; we are pointing to the entire
764 		for (indirect_split_t *is = list_head(&iv->iv_splits);
765 		    is != NULL; is = list_next(&iv->iv_splits, is)) {
768 			rc = is->is_vdev->v_read(is->is_vdev, zio.io_bp,
769 			    ptr + is->is_split_offset, is->is_target_offset,
770 			    is->is_size);
829 	 * First one which is the one we are replacing and we can trust
831 	 * Second one is that one we are replacing with. It is most likely
1073  * Insert vdev into top_vdev children list. List is ordered by v_id.
1083 	 * the firmware is presenting the disk devices.
1197 	 * A mirror or raidz is healthy if all its kids are healthy. A
1198 	 * mirror is degraded if any of its kids is healthy; a raidz
1199 	 * is degraded if at most nparity kids are offline.
1315 		 * Top level vdev is missing, create it.
1624  * Next best thing is vdev_phys - it is just after bootenv. It still may
1739 		 * If there is no envmap, we will just wipe bootenv.
1878 	 * For raidz, the asize is raw size of all children.
2016 	 * uberblock is most current.
2080 	 * Create the pool if this is the first time we've seen it.
2140 		 * If no other state is set, mark vdev healthy.
3085 			 * The dataset we are looking up is a snapshot
3086 			 * the dir_obj is the parent already, we don't want
3324  * dataset if there is none and return its details in *objset
3436 		 * It is older pool without features. As we have already
3526 	/* this is allowed to fail, older pools do not have salt */
3533 		printf("ZFS: pool %s is not supported\n", spa->spa_name);
3664 	 * Second test is purely to silence bogus compiler
3823 			 * not the link is relative.
3852  * when benvp is filled in, and some errno when not.
3896  * Get bootonce value by key. The bootonce <key, value> pair is removed from the
3897  * bootenv nvlist and the remaining nvlist is committed back to disk. This process