fs/befs/datastream.c

26 				 befs_blocknr_t blockno, befs_block_run *run);
31 				   befs_block_run *run);
36 				      befs_block_run *run);
53 	befs_block_run run;
61 	if (befs_fblock2brun(sb, ds, block, &run) != BEFS_OK) {
67 	bh = befs_bread_iaddr(sb, run);
80  * befs_fblock2brun - give back block run for fblock
84  * @run: The found run is passed back through this pointer
96 		 befs_blocknr_t fblock, befs_block_run *run)
102 		err = befs_find_brun_direct(sb, data, fblock, run);
105 		err = befs_find_brun_indirect(sb, data, fblock, run);
108 		err = befs_find_brun_dblindirect(sb, data, fblock, run);
222  * befs_find_brun_direct - find a direct block run in the datastream
226  * @run: The found run is passed back through this pointer
228  * Finds the block run that starts at file block number blockno
240  * incrementing this by the length of each block run as we come
246  * run as stored on disk, we offset the start and length members
247  * of the block run, so that blockno is the start and len is
248  * still valid (the run ends in the same place).
252 		      befs_blocknr_t blockno, befs_block_run *run)
265 			run->allocation_group = array[i].allocation_group;
266 			run->start = array[i].start + offset;
267 			run->len = array[i].len - offset;
283  * befs_find_brun_indirect - find a block run in the datastream
287  * @run: The found run is passed back through this pointer
289  * Finds the block run that starts at file block number blockno
297  * For each block in the indirect run of the datastream, read
308 			befs_block_run *run)
326 	/* Examine blocks of the indirect run one at a time */
344 				run->allocation_group =
346 				run->start =
348 				run->len =
374  * befs_find_brun_dblindirect - find a block run in the datastream
378  * @run: The found run is passed back through this pointer
380  * Finds the block run that starts at file block number blockno
390  * block run maps a constant amount of file data. This means
403  * though the double-indirect run may be several blocks long,
407  * the actual block run that maps the data block we are interested
410  * Then we offset the run as in befs_find_brun_array() and we are
417 			   befs_block_run *run)
509 	*run = fsrun_to_cpu(sb, iaddr_array[block_indx]);
517 	run->start += offset;
518 	run->len -= offset;