bsd/vfs/vfs_journal.c

31 // functions when the fs wants to modify meta-data blocks.  See
33 // data structures.
331 do_journal_io(journal *jnl, off_t *offset, void *data, size_t len, int direction)
369 		panic("jnl: request for i/o to jnl-header without JNL_HEADER flag set! (len %d, data %p)\n", curlen, data);
382 	buf_setdataptr(bp, (uintptr_t)data);
408 		data    = (char *)data + curlen;
420 read_journal_data(journal *jnl, off_t *offset, void *data, size_t len)
422 	return do_journal_io(jnl, offset, data, len, JNL_READ);
426 write_journal_data(journal *jnl, off_t *offset, void *data, size_t len)
428 	return do_journal_io(jnl, offset, data, len, JNL_WRITE);
433 read_journal_header(journal *jnl, void *data, size_t len)
437 	return do_journal_io(jnl, &hdr_offset, data, len, JNL_READ|JNL_HEADER);
491 	// the header does and thus overwrite data that the old
793 	// copy the journal data over top of it
1058 // the most recent data for those blocks. The array is "played" once the all the
1158 			// calculate the checksum based on the unswapped data
1290 						printf("jnl: %s: replay_journal: Could not read journal entry data @ offset 0x%llx!\n", jnl->jdev_name, offset);
1426 				printf("jnl: %s: replay_journal: Could not read journal entry data @ offset 0x%llx!\n", jnl->jdev_name, offset);
1750 			// we don't really care what data we write just so long
2575 		panic("jnl: modify_block_start: bp @ %p is not a meta-data block! (jnl %p)\n", bp, jnl);
2646 	// it out before we muck with it because it has data that belongs
2803 		// avoids having yet another linked list of small data structures to manage.
3093 ;				disk.  (This reduces the chance of overwriting live data in
3094 ;				a way that causes data loss if a transaction never gets
3410 			 * we've written to it, which will cause that data to be
3724 				 * mess around with its data.  buf_acquire()
3767 				 * copy the data into the transaction buffer...
3961 					 * the FS morphs the data in the buffer
3979 		 * before writing the actual journal data
4200 	// the FS a consistent view between it's incore data structures
4201 	// and the meta-data held in the cache
4240 					 * NO meta data can be written back to the disk, so
4379  *  	sufficient for file system data integrity as it