xfs/libxfs/xfs_rtbitmap.c

69  * Get a buffer for the bitmap or summary file block specified.
75 	xfs_fileoff_t		block,	/* block number in bitmap or summary */
79 	struct xfs_buf		**cbpp;	/* cached block buffer */
80 	xfs_fileoff_t		*coffp;	/* cached block number */
81 	struct xfs_buf		*bp;	/* block buffer, result */
101 	 * If we have a cached buffer, and the block number matches, use that.
103 	if (*cbpp && *coffp == block)
115 	error = xfs_bmapi_read(ip, block, 1, &map, &nmap, 0);
137 	*coffp = block;
142  * Searching backward from start to limit, find the first block whose
154 	xfs_fileoff_t		block;	/* bitmap block number */
166 	 * Compute and read in starting bitmap block for starting block.
168 	block = xfs_rtx_to_rbmblock(mp, start);
169 	error = xfs_rtbitmap_read_buf(args, block);
211 		 * Go on to previous block if that's where the previous word is
216 			 * If done with this block, get the previous one.
218 			error = xfs_rtbitmap_read_buf(args, --block);
249 		 * Go on to previous block if that's where the previous word is
254 			 * If done with this block, get the previous one.
256 			error = xfs_rtbitmap_read_buf(args, --block);
296  * Searching forward from start to limit, find the first block whose
308 	xfs_fileoff_t		block;	/* bitmap block number */
320 	 * Compute and read in starting bitmap block for starting block.
322 	block = xfs_rtx_to_rbmblock(mp, start);
323 	error = xfs_rtbitmap_read_buf(args, block);
364 		 * Go on to next block if that's where the next word is
369 			 * If done with this block, get the previous one.
371 			error = xfs_rtbitmap_read_buf(args, ++block);
402 		 * Go on to next block if that's where the next word is
407 			 * If done with this block, get the next one.
409 			error = xfs_rtbitmap_read_buf(args, ++block);
462  * Modify the summary information for a given extent size, bitmap block
469 	xfs_fileoff_t		bbno,	/* bitmap block number */
470 	int			delta)	/* in/out: summary block number */
497  * Read and return the summary information for a given extent size, bitmap block
504 	xfs_fileoff_t		bbno,	/* bitmap block number */
505 	xfs_suminfo_t		*sum)	/* out: summary info for this block */
517 /* Log rtbitmap block from the word @from to the byte before @next. */
546 	xfs_fileoff_t		block;	/* bitmap block number */
556 	 * Compute starting bitmap block number.
558 	block = xfs_rtx_to_rbmblock(mp, start);
560 	 * Read the bitmap block, and point to its data.
562 	error = xfs_rtbitmap_read_buf(args, block);
596 		 * Go on to the next block if that's where the next word is
601 			 * Log the changed part of this block.
605 			error = xfs_rtbitmap_read_buf(args, ++block);
628 		 * Go on to the next block if that's where the next word is
633 			 * Log the changed part of this block.
637 			error = xfs_rtbitmap_read_buf(args, ++block);
680 	xfs_rtxlen_t		len)	/* in/out: summary block number */
706 	 * Find the next allocated block (end of allocated extent).
760 	xfs_fileoff_t		block;	/* bitmap block number */
770 	 * Compute starting bitmap block number
772 	block = xfs_rtx_to_rbmblock(mp, start);
774 	 * Read the bitmap block.
776 	error = xfs_rtbitmap_read_buf(args, block);
817 		 * Go on to next block if that's where the next word is
822 			 * If done with this block, get the next one.
824 			error = xfs_rtbitmap_read_buf(args, ++block);
856 		 * Go on to next block if that's where the next word is
861 			 * If done with this block, get the next one.
863 			error = xfs_rtbitmap_read_buf(args, ++block);
904  * Check that the given extent (block range) is allocated already.
927  * realtime extents, as is the block number.
1046 		/* Is the first block free? */
1129  * Compute the number of rtbitmap words needed to populate every block of a
1157  * Compute the number of rtsummary info words needed to populate every block of