#include "lib9.h"#include "logfs.h"#include "local.h"#include "mp.h"#include "libsec.h" char *logfsformat(LogfsLowLevel *ll, long base, long limit, long bootsize, int trace){	long bootblocksdone, logblocksdone;	long u;	long baseblock, limitblock, bootblocks, sizeinblocks;	int magicfound;	void *llsave; 	if(trace > 1)		print("logfsformat: base %ld limit %ld bootsize %lud\n", base, limit, bootsize); 	if((*ll->getopenstatus)(ll))		return Eperm; 	if(!(*ll->calcformat)(ll, base, limit, bootsize, &baseblock, &limitblock, &bootblocks))		return Ebadarg; 	if(trace > 0)		print("logfsformat: baseblock %ld limitblock %ld bootblocks %ld\n", baseblock, limitblock, bootblocks); 	bootblocksdone = 0;	logblocksdone = 0;	/*	 * we need to create some fs blocks, and some boot blocks	 * the number of boot blocks is fixed; the number of fs blocks	 * occupies the remainder	 * the layout is randomised to:	 * 1) test the software	 * 2) spread wear around if a lot of format commands are issued by	 *     the bootloader	 */ 	sizeinblocks = limitblock - baseblock; 	for(u = 0; u < sizeinblocks; u++) {		int r;		uchar tag;		long path;		LogfsLowLevelReadResult e;		char *errmsg;		int markedbad; 		if(trace > 1)			print("block %lud:", u);		llsave = nil;		errmsg = (*ll->getblockstatus)(ll, u + baseblock, &magicfound, &llsave, &e);		if(errmsg)			return errmsg;		if(e == LogfsLowLevelReadResultBad) {			if(trace > 1)				print(" marked bad\n");			continue;		}		errmsg = (*ll->eraseblock)(ll, u + baseblock, nil, &markedbad);		if(errmsg)			return errmsg;		if(markedbad) {			if(trace > 1)				print(" marked bad\n");			continue;		}		if(e != LogfsLowLevelReadResultHardError && magicfound) {			if(trace > 1)				print(" previously formatted");		}		r = rand() % (sizeinblocks - u);		if(bootblocksdone < bootblocks && r < (bootblocks - bootblocksdone)) {			tag = LogfsTboot;			path = mkdatapath(bootblocksdone, 0);		}		else {			tag = LogfsTnone;			path = ~0;		}		if(trace > 1)			print(" tag %s path %ld", logfstagname(tag), path);		errmsg = (*ll->formatblock)(ll, u + baseblock, tag, path, baseblock, sizeinblocks, 1, &bootblocks, llsave, &markedbad);		logfsfreemem(llsave);		if(errmsg)			return errmsg;		if(markedbad) {			if(trace > 1)				print(" marked bad\n");			continue;		}		switch(tag) {		case LogfsTboot:			bootblocksdone++;			break;		case LogfsTnone:			logblocksdone++;			break;		}		if(trace > 1)			print("\n");	}	if(bootblocksdone < bootblocks)		return "not enough capacity left for boot";	if(trace > 0)		print("log blocks %lud\n", logblocksdone);	return nil;}