xfs/scrub/alloc_repair.c

48  * AG.  Therefore, we can recreate the free extent records in an AG by looking
49  * for gaps in the physical extents recorded in the rmapbt.  These records are
51  * reflink filesystem because rmap records are allowed to overlap.
58  * The scan of the reverse mapping information records the space used by OWN_AG
60  * walking the rmapbt records, we create a second bitmap @not_allocbt_blocks to
79  * parameter in place to avoid copying records around.
82  * reservation and used to format new btree blocks.  The remaining records are
111 	/* Number of non-null records in @free_records. */
118 	 * Next block we anticipate seeing in the rmap records.  If the next
223 /* Record extents that aren't in use from gaps in the rmap records. */
254 	 * rmap records can overlap on reflink filesystems, so project  in xrep_abt_walk_rmap()
294  * Re-sort the free extents by block number so that we can put the records into
295  * the bnobt in the correct order.  Make sure the records do not overlap in
342  * Sort the free extents by length so so that we can put the records into the
356  * Iterate all reverse mappings to find (1) the gaps between rmap records (all
417  * We're going to use the observed free space records to reserve blocks for the
421  * 1. Estimate how many blocks we'll need to store the records.
423  *    We will have to re-sort the records prior to building the cntbt.
462 		/* How many btree blocks do we need to store all records? */  in xrep_abt_reserve_space()
500 			 * free records doesn't change, so shrink the free  in xrep_abt_reserve_space()
501 			 * record, inform the caller that the records are no  in xrep_abt_reserve_space()
518 		 * records (but doesn't break the sorting order), so we must  in xrep_abt_reserve_space()
755 	 * can put the records into the cntbt in the correct order.  in xrep_abt_build_new_trees()
878 	descr = xchk_xfile_ag_descr(sc, "free space records");  in xrep_allocbt()