jffs2_1pass.c

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			version = jDir->version;
		}
		put_fl_mem(jDir);
	}
	/* now we found the right entry again. (shoulda returned inode*) */
	if (jDirFoundType != DT_LNK)
		return jDirFoundIno;

	/* it's a soft link so we follow it again. */
	b2 = pL->frag.listHead;
	while (b2) {
		jNode = (struct jffs2_raw_inode *) get_node_mem(b2->offset);
		if (jNode->ino == jDirFoundIno) {
			src = (unsigned char *)jNode + sizeof(struct jffs2_raw_inode);

#if 0
			putLabeledWord("\t\t dsize = ", jNode->dsize);
			putstr("\t\t target = ");
			putnstr(src, jNode->dsize);
			putstr("\r\n");
#endif
			strncpy(tmp, src, jNode->dsize);
			tmp[jNode->dsize] = '\0';
			put_fl_mem(jNode);
			break;
		}
		b2 = b2->next;
		put_fl_mem(jNode);
	}
	/* ok so the name of the new file to find is in tmp */
	/* if it starts with a slash it is root based else shared dirs */
	if (tmp[0] == '/')
		pino = 1;
	else
		pino = jDirFoundPino;

	return jffs2_1pass_search_inode(pL, tmp, pino);
}

static u32
jffs2_1pass_search_list_inodes(struct b_lists * pL, const char *fname, u32 pino)
{
	int i;
	char tmp[256];
	char working_tmp[256];
	char *c;

	/* discard any leading slash */
	i = 0;
	while (fname[i] == '/')
		i++;
	strcpy(tmp, &fname[i]);
	working_tmp[0] = '\0';
	while ((c = (char *) strchr(tmp, '/')))	/* we are still dired searching */
	{
		strncpy(working_tmp, tmp, c - tmp);
		working_tmp[c - tmp] = '\0';
		for (i = 0; i < strlen(c) - 1; i++)
			tmp[i] = c[i + 1];
		tmp[i] = '\0';
		/* only a failure if we arent looking at top level */
		if (!(pino = jffs2_1pass_find_inode(pL, working_tmp, pino)) &&
		    (working_tmp[0])) {
			putstr("find_inode failed for name=");
			putstr(working_tmp);
			putstr("\r\n");
			return 0;
		}
	}

	if (tmp[0] && !(pino = jffs2_1pass_find_inode(pL, tmp, pino))) {
		putstr("find_inode failed for name=");
		putstr(tmp);
		putstr("\r\n");
		return 0;
	}
	/* this is for the bare filename, directories have already been mapped */
	if (!(pino = jffs2_1pass_list_inodes(pL, pino))) {
		putstr("find_inode failed for name=");
		putstr(tmp);
		putstr("\r\n");
		return 0;
	}
	return pino;

}

unsigned char
jffs2_1pass_rescan_needed(struct part_info *part)
{
	struct b_node *b;
	struct jffs2_unknown_node onode;
	struct jffs2_unknown_node *node;
	struct b_lists *pL = (struct b_lists *)part->jffs2_priv;

	if (part->jffs2_priv == 0){
		DEBUGF ("rescan: First time in use\n");
		return 1;
	}
	/* if we have no list, we need to rescan */
	if (pL->frag.listCount == 0) {
		DEBUGF ("rescan: fraglist zero\n");
		return 1;
	}

	/* or if we are scanning a new partition */
	if (pL->partOffset != part->offset) {
		DEBUGF ("rescan: different partition\n");
		return 1;
	}

#if defined(CONFIG_JFFS2_NAND) && (CONFIG_COMMANDS & CFG_CMD_NAND)
	if (nanddev != (int)part->usr_priv - 1) {
		DEBUGF ("rescan: nand device changed\n");
		return -1;
	}
#endif /* defined(CONFIG_JFFS2_NAND) && (CONFIG_COMMANDS & CFG_CMD_NAND) */

	/* but suppose someone reflashed a partition at the same offset... */
	b = pL->dir.listHead;
	while (b) {
		node = (struct jffs2_unknown_node *) get_fl_mem(b->offset,
			sizeof(onode), &onode);
		if (node->nodetype != JFFS2_NODETYPE_DIRENT) {
			DEBUGF ("rescan: fs changed beneath me? (%lx)\n",
					(unsigned long) b->offset);
			return 1;
		}
		b = b->next;
	}
	return 0;
}

#ifdef DEBUG_FRAGMENTS
static void
dump_fragments(struct b_lists *pL)
{
	struct b_node *b;
	struct jffs2_raw_inode ojNode;
	struct jffs2_raw_inode *jNode;

	putstr("\r\n\r\n******The fragment Entries******\r\n");
	b = pL->frag.listHead;
	while (b) {
		jNode = (struct jffs2_raw_inode *) get_fl_mem(b->offset,
			sizeof(ojNode), &ojNode);
		putLabeledWord("\r\n\tbuild_list: FLASH_OFFSET = ", b->offset);
		putLabeledWord("\tbuild_list: totlen = ", jNode->totlen);
		putLabeledWord("\tbuild_list: inode = ", jNode->ino);
		putLabeledWord("\tbuild_list: version = ", jNode->version);
		putLabeledWord("\tbuild_list: isize = ", jNode->isize);
		putLabeledWord("\tbuild_list: atime = ", jNode->atime);
		putLabeledWord("\tbuild_list: offset = ", jNode->offset);
		putLabeledWord("\tbuild_list: csize = ", jNode->csize);
		putLabeledWord("\tbuild_list: dsize = ", jNode->dsize);
		putLabeledWord("\tbuild_list: compr = ", jNode->compr);
		putLabeledWord("\tbuild_list: usercompr = ", jNode->usercompr);
		putLabeledWord("\tbuild_list: flags = ", jNode->flags);
		putLabeledWord("\tbuild_list: offset = ", b->offset);	/* FIXME: ? [RS] */
		b = b->next;
	}
}
#endif

#ifdef DEBUG_DIRENTS
static void
dump_dirents(struct b_lists *pL)
{
	struct b_node *b;
	struct jffs2_raw_dirent *jDir;

	putstr("\r\n\r\n******The directory Entries******\r\n");
	b = pL->dir.listHead;
	while (b) {
		jDir = (struct jffs2_raw_dirent *) get_node_mem(b->offset);
		putstr("\r\n");
		putnstr(jDir->name, jDir->nsize);
		putLabeledWord("\r\n\tbuild_list: magic = ", jDir->magic);
		putLabeledWord("\tbuild_list: nodetype = ", jDir->nodetype);
		putLabeledWord("\tbuild_list: hdr_crc = ", jDir->hdr_crc);
		putLabeledWord("\tbuild_list: pino = ", jDir->pino);
		putLabeledWord("\tbuild_list: version = ", jDir->version);
		putLabeledWord("\tbuild_list: ino = ", jDir->ino);
		putLabeledWord("\tbuild_list: mctime = ", jDir->mctime);
		putLabeledWord("\tbuild_list: nsize = ", jDir->nsize);
		putLabeledWord("\tbuild_list: type = ", jDir->type);
		putLabeledWord("\tbuild_list: node_crc = ", jDir->node_crc);
		putLabeledWord("\tbuild_list: name_crc = ", jDir->name_crc);
		putLabeledWord("\tbuild_list: offset = ", b->offset); 	/* FIXME: ? [RS] */
		b = b->next;
		put_fl_mem(jDir);
	}
}
#endif

static u32
jffs2_1pass_build_lists(struct part_info * part)
{
	struct b_lists *pL;
	struct jffs2_unknown_node *node;
	u32 offset, oldoffset = 0;
	u32 max = part->size - sizeof(struct jffs2_raw_inode);
	u32 counter = 0;
	u32 counter4 = 0;
	u32 counterF = 0;
	u32 counterN = 0;

#if defined(CONFIG_JFFS2_NAND) && (CONFIG_COMMANDS & CFG_CMD_NAND)
	nanddev = (int)part->usr_priv - 1;
#endif /* defined(CONFIG_JFFS2_NAND) && (CONFIG_COMMANDS & CFG_CMD_NAND) */

	/* turn off the lcd.  Refreshing the lcd adds 50% overhead to the */
	/* jffs2 list building enterprise nope.  in newer versions the overhead is */
	/* only about 5 %.  not enough to inconvenience people for. */
	/* lcd_off(); */

	/* if we are building a list we need to refresh the cache. */
	jffs_init_1pass_list(part);
	pL = (struct b_lists *)part->jffs2_priv;
	pL->partOffset = part->offset;
	offset = 0;
	puts ("Scanning JFFS2 FS:   ");

	/* start at the beginning of the partition */
	while (offset < max) {
	    	if ((oldoffset >> SPIN_BLKSIZE) != (offset >> SPIN_BLKSIZE)) {
			printf("\b\b%c ", spinner[counter++ % sizeof(spinner)]);
			oldoffset = offset;
		}

		node = (struct jffs2_unknown_node *) get_node_mem((u32)part->offset + offset);
		if (node->magic == JFFS2_MAGIC_BITMASK && hdr_crc(node)) {
			/* if its a fragment add it */
			if (node->nodetype == JFFS2_NODETYPE_INODE &&
				    inode_crc((struct jffs2_raw_inode *) node)) {
				if (insert_node(&pL->frag, (u32) part->offset +
						offset) == NULL) {
					put_fl_mem(node);
					return 0;
				}
			} else if (node->nodetype == JFFS2_NODETYPE_DIRENT &&
				   dirent_crc((struct jffs2_raw_dirent *) node)  &&
				   dirent_name_crc((struct jffs2_raw_dirent *) node)) {
				if (! (counterN%100))
					puts ("\b\b.  ");
				if (insert_node(&pL->dir, (u32) part->offset +
						offset) == NULL) {
					put_fl_mem(node);
					return 0;
				}
				counterN++;
			} else if (node->nodetype == JFFS2_NODETYPE_CLEANMARKER) {
				if (node->totlen != sizeof(struct jffs2_unknown_node))
					printf("OOPS Cleanmarker has bad size "
						"%d != %d\n", node->totlen,
						sizeof(struct jffs2_unknown_node));
			} else if (node->nodetype == JFFS2_NODETYPE_PADDING) {
				if (node->totlen < sizeof(struct jffs2_unknown_node))
					printf("OOPS Padding has bad size "
						"%d < %d\n", node->totlen,
						sizeof(struct jffs2_unknown_node));
			} else {
				printf("Unknown node type: %x len %d "
					"offset 0x%x\n", node->nodetype,
					node->totlen, offset);
			}
			offset += ((node->totlen + 3) & ~3);
			counterF++;
		} else if (node->magic == JFFS2_EMPTY_BITMASK &&
			   node->nodetype == JFFS2_EMPTY_BITMASK) {
			offset = jffs2_scan_empty(offset, part);
		} else {	/* if we know nothing, we just step and look. */
			offset += 4;
			counter4++;
		}
/*             printf("unknown node magic %4.4x %4.4x @ %lx\n", node->magic, node->nodetype, (unsigned long)node); */
		put_fl_mem(node);
	}

	putstr("\b\b done.\r\n");		/* close off the dots */
	/* turn the lcd back on. */
	/* splash(); */

#if 0
	putLabeledWord("dir entries = ", pL->dir.listCount);
	putLabeledWord("frag entries = ", pL->frag.listCount);
	putLabeledWord("+4 increments = ", counter4);
	putLabeledWord("+file_offset increments = ", counterF);

#endif

#ifdef DEBUG_DIRENTS
	dump_dirents(pL);
#endif

#ifdef DEBUG_FRAGMENTS
	dump_fragments(pL);
#endif

	/* give visual feedback that we are done scanning the flash */
	led_blink(0x0, 0x0, 0x1, 0x1);	/* off, forever, on 100ms, off 100ms */
	return 1;
}


static u32
jffs2_1pass_fill_info(struct b_lists * pL, struct b_jffs2_info * piL)
{
	struct b_node *b;
	struct jffs2_raw_inode ojNode;
	struct jffs2_raw_inode *jNode;
	int i;

	for (i = 0; i < JFFS2_NUM_COMPR; i++) {
		piL->compr_info[i].num_frags = 0;
		piL->compr_info[i].compr_sum = 0;
		piL->compr_info[i].decompr_sum = 0;
	}

	b = pL->frag.listHead;
	while (b) {
		jNode = (struct jffs2_raw_inode *) get_fl_mem(b->offset,
			sizeof(ojNode), &ojNode);
		if (jNode->compr < JFFS2_NUM_COMPR) {
			piL->compr_info[jNode->compr].num_frags++;
			piL->compr_info[jNode->compr].compr_sum += jNode->csize;
			piL->compr_info[jNode->compr].decompr_sum += jNode->dsize;
		}
		b = b->next;
	}
	return 0;
}


static struct b_lists *
jffs2_get_list(struct part_info * part, const char *who)
{
	if (jffs2_1pass_rescan_needed(part)) {
		if (!jffs2_1pass_build_lists(part)) {
			printf("%s: Failed to scan JFFSv2 file structure\n", who);
			return NULL;
		}
	}
	return (struct b_lists *)part->jffs2_priv;
}


/* Print directory / file contents */
u32
jffs2_1pass_ls(struct part_info * part, const char *fname)
{
	struct b_lists *pl;
	long ret = 0;
	u32 inode;

	if (! (pl = jffs2_get_list(part, "ls")))
		return 0;

	if (! (inode = jffs2_1pass_search_list_inodes(pl, fname, 1))) {
		putstr("ls: Failed to scan jffs2 file structure\r\n");
		return 0;
	}


#if 0
	putLabeledWord("found file at inode = ", inode);
	putLabeledWord("read_inode returns = ", ret);
#endif

	return ret;
}


/* Load a file from flash into memory. fname can be a full path */
u32
jffs2_1pass_load(char *dest, struct part_info * part, const char *fname)
{

	struct b_lists *pl;
	long ret = 0;
	u32 inode;

	if (! (pl  = jffs2_get_list(part, "load")))
		return 0;

	if (! (inode = jffs2_1pass_search_inode(pl, fname, 1))) {
		putstr("load: Failed to find inode\r\n");
		return 0;
	}

	/* Resolve symlinks */
	if (! (inode = jffs2_1pass_resolve_inode(pl, inode))) {
		putstr("load: Failed to resolve inode structure\r\n");
		return 0;
	}

	if ((ret = jffs2_1pass_read_inode(pl, inode, dest)) < 0) {
		putstr("load: Failed to read inode\r\n");
		return 0;
	}

	DEBUGF ("load: loaded '%s' to 0x%lx (%ld bytes)\n", fname,
				(unsigned long) dest, ret);
	return ret;
}

/* Return information about the fs on this partition */
u32
jffs2_1pass_info(struct part_info * part)
{
	struct b_jffs2_info info;
	struct b_lists *pl;
	int i;

	if (! (pl  = jffs2_get_list(part, "info")))
		return 0;

	jffs2_1pass_fill_info(pl, &info);
	for (i = 0; i < JFFS2_NUM_COMPR; i++) {
		printf ("Compression: %s\n"
			"\tfrag count: %d\n"
			"\tcompressed sum: %d\n"
			"\tuncompressed sum: %d\n",
			compr_names[i],
			info.compr_info[i].num_frags,
			info.compr_info[i].compr_sum,
			info.compr_info[i].decompr_sum);
	}
	return 1;
}

#endif /* CFG_CMD_JFFS2 */