fs/xfs/xfs_log_recover.c

51  * Verify the log-relative block number and length in basic blocks are valid for
70  * a range of nbblks basic blocks at any valid offset within the log.
90 	 * the basic blocks required for complete log sectors.
97 	 * blocks (sector size 1).  But otherwise we extend the buffer by one
304  * Check that a range of blocks does not contain stop_on_cycle_no.
328 	 * range of basic blocks we'll be examining.  If that fails,
387  * of blocks we would have read on a previous read.  This happens when the
390  * extra_bblks is the number of blocks potentially verified on a previous
583 		 * We don't worry about the x+1 blocks that we encounter,
621 	 * blocks and make sure each one has the expected cycle number.  The
643 		 * of the log, we are looking for blocks with cycle number
650 		 * If all of the blocks at the end of the log have cycle number
651 		 * last_half_cycle, then we check the blocks at the start of
663 		 * x + 1 blocks.  We need to skip past those since that is
830  * Given head and tail blocks, walk forward from the tail block until we find
967 	 * blocks cleared during the search for the head/tail. These blocks are
1074 		 * Note that xlog_find_tail() clears the blocks at the new head
1346 	 * Make sure that there are no blocks in front of the head
1380  * the X blocks.  This will cut down on the number of reads we need to do.
1440 	 * we scan over the defined maximum blocks.  At this point, the maximum
1512 	int		blocks,
1520 	int		end_block = start_block + blocks;
1527 	 * range of basic blocks to be written.  If that fails, try
1531 	bufblks = roundup_pow_of_two(blocks);
1595  * cause us to think those partial writes are valid blocks since they
1624 	 * and the tail.  We want to write over any blocks beyond the
1675 		 * We can stomp all the blocks we need to without
1689 		 * order to clear all the blocks.  Do it in two separate
1703 		 * Now write the blocks at the start of the physical log.
1704 		 * This writes the remainder of the blocks we want to clear.
1708 		 *    ^^^^^ blocks we're writing
2781  * AGI blocks. What we do here is scan all the AGIs and fully truncate and free
3225 		/* blocks in data section */
3542 	 * Recover any CoW staging blocks that are still referenced by the