C++ JFFS2_SUMMARY_DIRENT_SIZE函数代码示例

static int jffs2_sum_add_mem(struct jffs2_summary *s, union jffs2_sum_mem *item)
{
	if (!s->sum_list_head)
		s->sum_list_head = (union jffs2_sum_mem *) item;
	if (s->sum_list_tail)
		s->sum_list_tail->u.next = (union jffs2_sum_mem *) item;
	s->sum_list_tail = (union jffs2_sum_mem *) item;

	switch (je16_to_cpu(item->u.nodetype)) {
		case JFFS2_NODETYPE_INODE:
			s->sum_size += JFFS2_SUMMARY_INODE_SIZE;
			s->sum_num++;
			dbg_summary("inode (%u) added to summary\n",
						je32_to_cpu(item->i.inode));
			break;
		case JFFS2_NODETYPE_DIRENT:
			s->sum_size += JFFS2_SUMMARY_DIRENT_SIZE(item->d.nsize);
			s->sum_num++;
			dbg_summary("dirent (%u) added to summary\n",
						je32_to_cpu(item->d.ino));
			break;
		default:
			JFFS2_WARNING("UNKNOWN node type %u\n",
					    je16_to_cpu(item->u.nodetype));
			return 1;
	}
	return 0;
}

void write_dirent_to_buff(union jffs2_node_union *node)
{
	pad_block_if_less_than(je32_to_cpu (node->d.totlen),JFFS2_SUMMARY_DIRENT_SIZE(node->d.nsize));
	add_sum_dirent_mem(node);
	full_write(data_buffer + data_ofs, &(node->d), je32_to_cpu (node->d.totlen));
	padword();
}

int add_sum_mem(union jffs2_sum_mem *item)
{

	if (!sum_collected->sum_list_head)
		sum_collected->sum_list_head = (union jffs2_sum_mem *) item;
	if (sum_collected->sum_list_tail)
		sum_collected->sum_list_tail->u.next = (union jffs2_sum_mem *) item;
	sum_collected->sum_list_tail = (union jffs2_sum_mem *) item;

	switch (je16_to_cpu(item->u.nodetype)) {
		case JFFS2_NODETYPE_INODE:
			sum_collected->sum_size += JFFS2_SUMMARY_INODE_SIZE;
			sum_collected->sum_num++;
			break;

		case JFFS2_NODETYPE_DIRENT:
			sum_collected->sum_size += JFFS2_SUMMARY_DIRENT_SIZE(item->d.nsize);
			sum_collected->sum_num++;
			break;

		case JFFS2_NODETYPE_XATTR:
			sum_collected->sum_size += JFFS2_SUMMARY_XATTR_SIZE;
			sum_collected->sum_num++;
			break;

		case JFFS2_NODETYPE_XREF:
			sum_collected->sum_size += JFFS2_SUMMARY_XREF_SIZE;
			sum_collected->sum_num++;
			break;

		default:
			error_msg_and_die("__jffs2_add_sum_mem(): UNKNOWN node type %d\n", je16_to_cpu(item->u.nodetype));
	}
	return 0;
}

static int jffs2_sum_add_mem(struct jffs2_summary *s, union jffs2_sum_mem *item)
{
	if (!s->sum_list_head)
		s->sum_list_head = (union jffs2_sum_mem *) item;
	if (s->sum_list_tail)
		s->sum_list_tail->u.next = (union jffs2_sum_mem *) item;
	s->sum_list_tail = (union jffs2_sum_mem *) item;

	switch (je16_to_cpu(item->u.nodetype)) {
		case JFFS2_NODETYPE_INODE:
			s->sum_size += JFFS2_SUMMARY_INODE_SIZE;
			s->sum_num++;
			dbg_summary("inode (%u) added to summary\n",
						je32_to_cpu(item->i.inode));
			break;
		case JFFS2_NODETYPE_DIRENT:
			s->sum_size += JFFS2_SUMMARY_DIRENT_SIZE(item->d.nsize);
			s->sum_num++;
			dbg_summary("dirent (%u) added to summary\n",
						je32_to_cpu(item->d.ino));
			break;
#ifdef CONFIG_JFFS2_FS_XATTR
		case JFFS2_NODETYPE_XATTR:
			s->sum_size += JFFS2_SUMMARY_XATTR_SIZE;
			s->sum_num++;
			dbg_summary("xattr (xid=%u, version=%u) added to summary\n",
				    je32_to_cpu(item->x.xid), je32_to_cpu(item->x.version));
			break;
		case JFFS2_NODETYPE_XREF:
			s->sum_size += JFFS2_SUMMARY_XREF_SIZE;
			s->sum_num++;
			dbg_summary("xref added to summary\n");
			break;
#endif
		default:
			JFFS2_WARNING("UNKNOWN node type %u\n",
					    je16_to_cpu(item->u.nodetype));
			return 1;
	}
	return 0;
}

//.........这里部分代码省略.........

				for(i=0; i<je32_to_cpu(node->s.sum_num); i++) {

					switch(je16_to_cpu(((struct jffs2_sum_unknown_flash *)sp)->nodetype)) {
						case JFFS2_NODETYPE_INODE : {

							struct jffs2_sum_inode_flash *spi;
							spi = sp;

							printf ("%14s #ino  %5d,  version %5d, offset 0x%08x, totlen 0x%08x\n",
							"",
							je32_to_cpu (spi->inode),
							je32_to_cpu (spi->version),
							je32_to_cpu (spi->offset),
							je32_to_cpu (spi->totlen));

							sp += JFFS2_SUMMARY_INODE_SIZE;
							break;
						}

						case JFFS2_NODETYPE_DIRENT : {

							char name[255];
							struct jffs2_sum_dirent_flash *spd;
							spd = sp;

							memcpy(name,spd->name,spd->nsize);
							name [spd->nsize] = 0x0;

							printf ("%14s dirent offset 0x%08x, totlen 0x%08x, #pino  %5d,  version %5d, #ino  %8d, nsize %8d, name %s \n",
							"",
							je32_to_cpu (spd->offset),
							je32_to_cpu (spd->totlen),
							je32_to_cpu (spd->pino),
							je32_to_cpu (spd->version),
							je32_to_cpu (spd->ino),
							spd->nsize,
							name);

							sp += JFFS2_SUMMARY_DIRENT_SIZE(spd->nsize);
							break;
						}

						default :
							printf("Unknown summary node!\n");
							break;
					}
				}

				sm = (struct jffs2_sum_marker *) ((char *)p + je32_to_cpu(node->s.totlen) - sizeof(struct jffs2_sum_marker));

				printf("%14s Sum Node Offset  0x%08x, Magic 0x%08x, Padded size 0x%08x\n",
					"",
					je32_to_cpu(sm->offset),
					je32_to_cpu(sm->magic),
					je32_to_cpu(node->s.padded));
			}

			p += PAD(je32_to_cpu (node->s.totlen));
			break;
		}

		case JFFS2_NODETYPE_CLEANMARKER:
			if (verbose) {
				printf ("%8s Cleanmarker     at 0x%08x, totlen 0x%08x\n", 
					obsolete ? "Obsolete" : "",
					p - data, je32_to_cpu (node->u.totlen));
			}		
			p += PAD(je32_to_cpu (node->u.totlen));						
			break;
	
		case JFFS2_NODETYPE_PADDING:
			if (verbose) {
				printf ("%8s Padding    node at 0x%08x, totlen 0x%08x\n", 
					obsolete ? "Obsolete" : "",
					p - data, je32_to_cpu (node->u.totlen));
			}		
			p += PAD(je32_to_cpu (node->u.totlen));						
			break;
			
		case 0xffff:
			p += 4;
			empty += 4;
			break;
			
		default:	
			if (verbose) {
				printf ("%8s Unknown    node at 0x%08x, totlen 0x%08x\n", 
					obsolete ? "Obsolete" : "",
					p - data, je32_to_cpu (node->u.totlen));
			}		
			p += PAD(je32_to_cpu (node->u.totlen));						
			dirty += PAD(je32_to_cpu (node->u.totlen));						
	
		}
	}
	
	if (verbose)
		printf ("Empty space: %d, dirty space: %d\n", empty, dirty);
}

static int jffs2_mknod (struct inode *dir_i, struct dentry *dentry, int mode, dev_t rdev)
{
	struct jffs2_inode_info *f, *dir_f;
	struct jffs2_sb_info *c;
	struct inode *inode;
	struct jffs2_raw_inode *ri;
	struct jffs2_raw_dirent *rd;
	struct jffs2_full_dnode *fn;
	struct jffs2_full_dirent *fd;
	int namelen;
	union jffs2_device_node dev;
	int devlen = 0;
	uint32_t alloclen;
	int ret;

	if (!new_valid_dev(rdev))
		return -EINVAL;

	ri = jffs2_alloc_raw_inode();
	if (!ri)
		return -ENOMEM;

	c = JFFS2_SB_INFO(dir_i->i_sb);

	if (S_ISBLK(mode) || S_ISCHR(mode))
		devlen = jffs2_encode_dev(&dev, rdev);

	/* Try to reserve enough space for both node and dirent.
	 * Just the node will do for now, though
	 */
	namelen = dentry->d_name.len;
	ret = jffs2_reserve_space(c, sizeof(*ri) + devlen, &alloclen,
				  ALLOC_NORMAL, JFFS2_SUMMARY_INODE_SIZE);

	if (ret) {
		jffs2_free_raw_inode(ri);
		return ret;
	}

	inode = jffs2_new_inode(dir_i, mode, ri);

	if (IS_ERR(inode)) {
		jffs2_free_raw_inode(ri);
		jffs2_complete_reservation(c);
		return PTR_ERR(inode);
	}
	inode->i_op = &jffs2_file_inode_operations;
	init_special_inode(inode, inode->i_mode, rdev);

	f = JFFS2_INODE_INFO(inode);

	ri->dsize = ri->csize = cpu_to_je32(devlen);
	ri->totlen = cpu_to_je32(sizeof(*ri) + devlen);
	ri->hdr_crc = cpu_to_je32(crc32(0, ri, sizeof(struct jffs2_unknown_node)-4));

	ri->compr = JFFS2_COMPR_NONE;
	ri->data_crc = cpu_to_je32(crc32(0, &dev, devlen));
	ri->node_crc = cpu_to_je32(crc32(0, ri, sizeof(*ri)-8));

	fn = jffs2_write_dnode(c, f, ri, (char *)&dev, devlen, ALLOC_NORMAL);

	jffs2_free_raw_inode(ri);

	if (IS_ERR(fn)) {
		/* Eeek. Wave bye bye */
		mutex_unlock(&f->sem);
		jffs2_complete_reservation(c);
		ret = PTR_ERR(fn);
		goto fail;
	}
	/* No data here. Only a metadata node, which will be
	   obsoleted by the first data write
	*/
	f->metadata = fn;
	mutex_unlock(&f->sem);

	jffs2_complete_reservation(c);

	ret = jffs2_init_security(inode, dir_i, &dentry->d_name);
	if (ret)
		goto fail;

	ret = jffs2_init_acl_post(inode);
	if (ret)
		goto fail;

	ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &alloclen,
				  ALLOC_NORMAL, JFFS2_SUMMARY_DIRENT_SIZE(namelen));
	if (ret)
		goto fail;

	rd = jffs2_alloc_raw_dirent();
	if (!rd) {
		/* Argh. Now we treat it like a normal delete */
		jffs2_complete_reservation(c);
		ret = -ENOMEM;
		goto fail;
	}

	dir_f = JFFS2_INODE_INFO(dir_i);
//.........这里部分代码省略.........

static int jffs2_mkdir (struct inode *dir_i, struct dentry *dentry, int mode)
{
	struct jffs2_inode_info *f, *dir_f;
	struct jffs2_sb_info *c;
	struct inode *inode;
	struct jffs2_raw_inode *ri;
	struct jffs2_raw_dirent *rd;
	struct jffs2_full_dnode *fn;
	struct jffs2_full_dirent *fd;
	int namelen;
	uint32_t alloclen;
	int ret;

	mode |= S_IFDIR;

	ri = jffs2_alloc_raw_inode();
	if (!ri)
		return -ENOMEM;

	c = JFFS2_SB_INFO(dir_i->i_sb);

	/* Try to reserve enough space for both node and dirent.
	 * Just the node will do for now, though
	 */
	namelen = dentry->d_name.len;
	ret = jffs2_reserve_space(c, sizeof(*ri), &alloclen, ALLOC_NORMAL,
				  JFFS2_SUMMARY_INODE_SIZE);

	if (ret) {
		jffs2_free_raw_inode(ri);
		return ret;
	}

	inode = jffs2_new_inode(dir_i, mode, ri);

	if (IS_ERR(inode)) {
		jffs2_free_raw_inode(ri);
		jffs2_complete_reservation(c);
		return PTR_ERR(inode);
	}

	inode->i_op = &jffs2_dir_inode_operations;
	inode->i_fop = &jffs2_dir_operations;

	f = JFFS2_INODE_INFO(inode);

	/* Directories get nlink 2 at start */
	inode->i_nlink = 2;
	/* but ic->pino_nlink is the parent ino# */
	f->inocache->pino_nlink = dir_i->i_ino;

	ri->data_crc = cpu_to_je32(0);
	ri->node_crc = cpu_to_je32(crc32(0, ri, sizeof(*ri)-8));

	fn = jffs2_write_dnode(c, f, ri, NULL, 0, ALLOC_NORMAL);

	jffs2_free_raw_inode(ri);

	if (IS_ERR(fn)) {
		/* Eeek. Wave bye bye */
		mutex_unlock(&f->sem);
		jffs2_complete_reservation(c);
		ret = PTR_ERR(fn);
		goto fail;
	}
	/* No data here. Only a metadata node, which will be
	   obsoleted by the first data write
	*/
	f->metadata = fn;
	mutex_unlock(&f->sem);

	jffs2_complete_reservation(c);

	ret = jffs2_init_security(inode, dir_i, &dentry->d_name);
	if (ret)
		goto fail;

	ret = jffs2_init_acl_post(inode);
	if (ret)
		goto fail;

	ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &alloclen,
				  ALLOC_NORMAL, JFFS2_SUMMARY_DIRENT_SIZE(namelen));
	if (ret)
		goto fail;

	rd = jffs2_alloc_raw_dirent();
	if (!rd) {
		/* Argh. Now we treat it like a normal delete */
		jffs2_complete_reservation(c);
		ret = -ENOMEM;
		goto fail;
	}

	dir_f = JFFS2_INODE_INFO(dir_i);
	mutex_lock(&dir_f->sem);

	rd->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK);
	rd->nodetype = cpu_to_je16(JFFS2_NODETYPE_DIRENT);
	rd->totlen = cpu_to_je32(sizeof(*rd) + namelen);
//.........这里部分代码省略.........

static int jffs2_symlink (struct inode *dir_i, struct dentry *dentry, const char *target)
{
	struct jffs2_inode_info *f, *dir_f;
	struct jffs2_sb_info *c;
	struct inode *inode;
	struct jffs2_raw_inode *ri;
	struct jffs2_raw_dirent *rd;
	struct jffs2_full_dnode *fn;
	struct jffs2_full_dirent *fd;
	int namelen;
	uint32_t alloclen;
	int ret, targetlen = strlen(target);

	/* FIXME: If you care. We'd need to use frags for the target
	   if it grows much more than this */
	if (targetlen > 254)
		return -ENAMETOOLONG;

	ri = jffs2_alloc_raw_inode();

	if (!ri)
		return -ENOMEM;

	c = JFFS2_SB_INFO(dir_i->i_sb);

	/* Try to reserve enough space for both node and dirent.
	 * Just the node will do for now, though
	 */
	namelen = dentry->d_name.len;
	ret = jffs2_reserve_space(c, sizeof(*ri) + targetlen, &alloclen,
				  ALLOC_NORMAL, JFFS2_SUMMARY_INODE_SIZE);

	if (ret) {
		jffs2_free_raw_inode(ri);
		return ret;
	}

	inode = jffs2_new_inode(dir_i, S_IFLNK | S_IRWXUGO, ri);

	if (IS_ERR(inode)) {
		jffs2_free_raw_inode(ri);
		jffs2_complete_reservation(c);
		return PTR_ERR(inode);
	}

	inode->i_op = &jffs2_symlink_inode_operations;

	f = JFFS2_INODE_INFO(inode);

	inode->i_size = targetlen;
	ri->isize = ri->dsize = ri->csize = cpu_to_je32(inode->i_size);
	ri->totlen = cpu_to_je32(sizeof(*ri) + inode->i_size);
	ri->hdr_crc = cpu_to_je32(crc32(0, ri, sizeof(struct jffs2_unknown_node)-4));

	ri->compr = JFFS2_COMPR_NONE;
	ri->data_crc = cpu_to_je32(crc32(0, target, targetlen));
	ri->node_crc = cpu_to_je32(crc32(0, ri, sizeof(*ri)-8));

	fn = jffs2_write_dnode(c, f, ri, target, targetlen, ALLOC_NORMAL);

	jffs2_free_raw_inode(ri);

	if (IS_ERR(fn)) {
		/* Eeek. Wave bye bye */
		mutex_unlock(&f->sem);
		jffs2_complete_reservation(c);
		ret = PTR_ERR(fn);
		goto fail;
	}

	/* We use f->target field to store the target path. */
	f->target = kmemdup(target, targetlen + 1, GFP_KERNEL);
	if (!f->target) {
;
		mutex_unlock(&f->sem);
		jffs2_complete_reservation(c);
		ret = -ENOMEM;
		goto fail;
	}

	D1(printk(KERN_DEBUG "jffs2_symlink: symlink's target '%s' cached\n", (char *)f->target));

	/* No data here. Only a metadata node, which will be
	   obsoleted by the first data write
	*/
	f->metadata = fn;
	mutex_unlock(&f->sem);

	jffs2_complete_reservation(c);

	ret = jffs2_init_security(inode, dir_i, &dentry->d_name);
	if (ret)
		goto fail;

	ret = jffs2_init_acl_post(inode);
	if (ret)
		goto fail;

	ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &alloclen,
				  ALLOC_NORMAL, JFFS2_SUMMARY_DIRENT_SIZE(namelen));
//.........这里部分代码省略.........

static int jffs2_sum_write_data(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb,
				uint32_t infosize, uint32_t datasize, int padsize)
{
	struct jffs2_raw_summary isum;
	union jffs2_sum_mem *temp;
	struct jffs2_sum_marker *sm;
	struct kvec vecs[2];
	uint32_t sum_ofs;
	void *wpage;
	int ret;
	size_t retlen;

	if (padsize + datasize > MAX_SUMMARY_SIZE) {
		/* It won't fit in the buffer. Abort summary for this jeb */
		jffs2_sum_disable_collecting(c->summary);

		JFFS2_WARNING("Summary too big (%d data, %d pad) in eraseblock at %08x\n",
			      datasize, padsize, jeb->offset);
		/* Non-fatal */
		return 0;
	}
	/* Is there enough space for summary? */
	if (padsize < 0) {
		/* don't try to write out summary for this jeb */
		jffs2_sum_disable_collecting(c->summary);

		JFFS2_WARNING("Not enough space for summary, padsize = %d\n",
			      padsize);
		/* Non-fatal */
		return 0;
	}

	memset(c->summary->sum_buf, 0xff, datasize);
	memset(&isum, 0, sizeof(isum));

	isum.magic = cpu_to_je16(JFFS2_MAGIC_BITMASK);
	isum.nodetype = cpu_to_je16(JFFS2_NODETYPE_SUMMARY);
	isum.totlen = cpu_to_je32(infosize);
	isum.hdr_crc = cpu_to_je32(crc32(0, &isum, sizeof(struct jffs2_unknown_node) - 4));
	isum.padded = cpu_to_je32(c->summary->sum_padded);
	isum.cln_mkr = cpu_to_je32(c->cleanmarker_size);
	isum.sum_num = cpu_to_je32(c->summary->sum_num);
	wpage = c->summary->sum_buf;

	while (c->summary->sum_num) {
		temp = c->summary->sum_list_head;

		switch (je16_to_cpu(temp->u.nodetype)) {
			case JFFS2_NODETYPE_INODE: {
				struct jffs2_sum_inode_flash *sino_ptr = wpage;

				sino_ptr->nodetype = temp->i.nodetype;
				sino_ptr->inode = temp->i.inode;
				sino_ptr->version = temp->i.version;
				sino_ptr->offset = temp->i.offset;
				sino_ptr->totlen = temp->i.totlen;

				wpage += JFFS2_SUMMARY_INODE_SIZE;

				break;
			}

			case JFFS2_NODETYPE_DIRENT: {
				struct jffs2_sum_dirent_flash *sdrnt_ptr = wpage;

				sdrnt_ptr->nodetype = temp->d.nodetype;
				sdrnt_ptr->totlen = temp->d.totlen;
				sdrnt_ptr->offset = temp->d.offset;
				sdrnt_ptr->pino = temp->d.pino;
				sdrnt_ptr->version = temp->d.version;
				sdrnt_ptr->ino = temp->d.ino;
				sdrnt_ptr->nsize = temp->d.nsize;
				sdrnt_ptr->type = temp->d.type;

				memcpy(sdrnt_ptr->name, temp->d.name,
							temp->d.nsize);

				wpage += JFFS2_SUMMARY_DIRENT_SIZE(temp->d.nsize);

				break;
			}
#ifdef CONFIG_JFFS2_FS_XATTR
			case JFFS2_NODETYPE_XATTR: {
				struct jffs2_sum_xattr_flash *sxattr_ptr = wpage;

				temp = c->summary->sum_list_head;
				sxattr_ptr->nodetype = temp->x.nodetype;
				sxattr_ptr->xid = temp->x.xid;
				sxattr_ptr->version = temp->x.version;
				sxattr_ptr->offset = temp->x.offset;
				sxattr_ptr->totlen = temp->x.totlen;

				wpage += JFFS2_SUMMARY_XATTR_SIZE;
				break;
			}
			case JFFS2_NODETYPE_XREF: {
				struct jffs2_sum_xref_flash *sxref_ptr = wpage;

				temp = c->summary->sum_list_head;
				sxref_ptr->nodetype = temp->r.nodetype;
//.........这里部分代码省略.........

//.........这里部分代码省略.........
					pr_err("Dirent at %08x has zeroes in name. Truncating to %d chars\n",
					       jeb->offset +
					       je32_to_cpu(spd->offset),
					       checkedlen);
				}


				fd = jffs2_alloc_full_dirent(checkedlen+1);
				if (!fd)
					return -ENOMEM;

				memcpy(&fd->name, spd->name, checkedlen);
				fd->name[checkedlen] = 0;

				ic = jffs2_scan_make_ino_cache(c, je32_to_cpu(spd->pino));
				if (!ic) {
					jffs2_free_full_dirent(fd);
					return -ENOMEM;
				}

				fd->raw = sum_link_node_ref(c, jeb,  je32_to_cpu(spd->offset) | REF_UNCHECKED,
							    PAD(je32_to_cpu(spd->totlen)), ic);

				fd->next = NULL;
				fd->version = je32_to_cpu(spd->version);
				fd->ino = je32_to_cpu(spd->ino);
				fd->nhash = full_name_hash(NULL, fd->name, checkedlen);
				fd->type = spd->type;

				jffs2_add_fd_to_list(c, fd, &ic->scan_dents);

				*pseudo_random += je32_to_cpu(spd->version);

				sp += JFFS2_SUMMARY_DIRENT_SIZE(spd->nsize);

				break;
			}
#ifdef CONFIG_JFFS2_FS_XATTR
			case JFFS2_NODETYPE_XATTR: {
				struct jffs2_xattr_datum *xd;
				struct jffs2_sum_xattr_flash *spx;

				spx = (struct jffs2_sum_xattr_flash *)sp;
				dbg_summary("xattr at %#08x-%#08x (xid=%u, version=%u)\n", 
					    jeb->offset + je32_to_cpu(spx->offset),
					    jeb->offset + je32_to_cpu(spx->offset) + je32_to_cpu(spx->totlen),
					    je32_to_cpu(spx->xid), je32_to_cpu(spx->version));

				xd = jffs2_setup_xattr_datum(c, je32_to_cpu(spx->xid),
								je32_to_cpu(spx->version));
				if (IS_ERR(xd))
					return PTR_ERR(xd);
				if (xd->version > je32_to_cpu(spx->version)) {
					/* node is not the newest one */
					struct jffs2_raw_node_ref *raw
						= sum_link_node_ref(c, jeb, je32_to_cpu(spx->offset) | REF_UNCHECKED,
								    PAD(je32_to_cpu(spx->totlen)), NULL);
					raw->next_in_ino = xd->node->next_in_ino;
					xd->node->next_in_ino = raw;
				} else {
					xd->version = je32_to_cpu(spx->version);
					sum_link_node_ref(c, jeb, je32_to_cpu(spx->offset) | REF_UNCHECKED,
							  PAD(je32_to_cpu(spx->totlen)), (void *)xd);
				}
				*pseudo_random += je32_to_cpu(spx->xid);
				sp += JFFS2_SUMMARY_XATTR_SIZE;

static int jffs2_sum_write_data(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb,
					uint32_t infosize, uint32_t datasize, int padsize)
{
	struct jffs2_raw_summary isum;
	union jffs2_sum_mem *temp;
	struct jffs2_sum_marker *sm;
	struct kvec vecs[2];
	void *wpage;
	int ret;
	size_t retlen;

	memset(c->summary->sum_buf, 0xff, datasize);
	memset(&isum, 0, sizeof(isum));

	isum.magic = cpu_to_je16(JFFS2_MAGIC_BITMASK);
	isum.nodetype = cpu_to_je16(JFFS2_NODETYPE_SUMMARY);
	isum.totlen = cpu_to_je32(infosize);
	isum.hdr_crc = cpu_to_je32(crc32(0, &isum, sizeof(struct jffs2_unknown_node) - 4));
	isum.padded = cpu_to_je32(c->summary->sum_padded);
	isum.cln_mkr = cpu_to_je32(c->cleanmarker_size);
	isum.sum_num = cpu_to_je32(c->summary->sum_num);
	wpage = c->summary->sum_buf;

	while (c->summary->sum_num) {

		switch (je16_to_cpu(c->summary->sum_list_head->u.nodetype)) {
			case JFFS2_NODETYPE_INODE: {
				struct jffs2_sum_inode_flash *sino_ptr = wpage;

				sino_ptr->nodetype = c->summary->sum_list_head->i.nodetype;
				sino_ptr->inode = c->summary->sum_list_head->i.inode;
				sino_ptr->version = c->summary->sum_list_head->i.version;
				sino_ptr->offset = c->summary->sum_list_head->i.offset;
				sino_ptr->totlen = c->summary->sum_list_head->i.totlen;

				wpage += JFFS2_SUMMARY_INODE_SIZE;

				break;
			}

			case JFFS2_NODETYPE_DIRENT: {
				struct jffs2_sum_dirent_flash *sdrnt_ptr = wpage;

				sdrnt_ptr->nodetype = c->summary->sum_list_head->d.nodetype;
				sdrnt_ptr->totlen = c->summary->sum_list_head->d.totlen;
				sdrnt_ptr->offset = c->summary->sum_list_head->d.offset;
				sdrnt_ptr->pino = c->summary->sum_list_head->d.pino;
				sdrnt_ptr->version = c->summary->sum_list_head->d.version;
				sdrnt_ptr->ino = c->summary->sum_list_head->d.ino;
				sdrnt_ptr->nsize = c->summary->sum_list_head->d.nsize;
				sdrnt_ptr->type = c->summary->sum_list_head->d.type;

				memcpy(sdrnt_ptr->name, c->summary->sum_list_head->d.name,
							c->summary->sum_list_head->d.nsize);

				wpage += JFFS2_SUMMARY_DIRENT_SIZE(c->summary->sum_list_head->d.nsize);

				break;
			}

			default : {
				BUG();	/* unknown node in summary information */
			}
		}

		temp = c->summary->sum_list_head;
		c->summary->sum_list_head = c->summary->sum_list_head->u.next;
		kfree(temp);

		c->summary->sum_num--;
	}

	jffs2_sum_reset_collected(c->summary);

	wpage += padsize;

	sm = wpage;
	sm->offset = cpu_to_je32(c->sector_size - jeb->free_size);
	sm->magic = cpu_to_je32(JFFS2_SUM_MAGIC);

	isum.sum_crc = cpu_to_je32(crc32(0, c->summary->sum_buf, datasize));
	isum.node_crc = cpu_to_je32(crc32(0, &isum, sizeof(isum) - 8));

	vecs[0].iov_base = &isum;
	vecs[0].iov_len = sizeof(isum);
	vecs[1].iov_base = c->summary->sum_buf;
	vecs[1].iov_len = datasize;

	dbg_summary("JFFS2: writing out data to flash to pos : 0x%08x\n",
			jeb->offset + c->sector_size - jeb->free_size);

	spin_unlock(&c->erase_completion_lock);
	ret = jffs2_flash_writev(c, vecs, 2, jeb->offset + c->sector_size -
				jeb->free_size, &retlen, 0);
	spin_lock(&c->erase_completion_lock);


	if (ret || (retlen != infosize)) {
		JFFS2_WARNING("Write of %zd bytes at 0x%08x failed. returned %d, retlen %zd\n",
			infosize, jeb->offset + c->sector_size - jeb->free_size, ret, retlen);
//.........这里部分代码省略.........

//.........这里部分代码省略.........
				}

				ic = jffs2_scan_make_ino_cache(c, ino);
				if (!ic) {
					JFFS2_NOTICE("scan_make_ino_cache failed\n");
					jffs2_free_raw_node_ref(raw);
					kfree(summary);
					return -ENOMEM;
				}

				raw->flash_offset = (jeb->offset + je32_to_cpu(spi->offset)) | REF_UNCHECKED;
				raw->__totlen = PAD(je32_to_cpu(spi->totlen));
				raw->next_phys = NULL;
				raw->next_in_ino = ic->nodes;

				ic->nodes = raw;
				if (!jeb->first_node)
					jeb->first_node = raw;
				if (jeb->last_node)
					jeb->last_node->next_phys = raw;
				jeb->last_node = raw;
				*pseudo_random += je32_to_cpu(spi->version);

				UNCHECKED_SPACE(PAD(je32_to_cpu(spi->totlen)));

				sp += JFFS2_SUMMARY_INODE_SIZE;

				break;
			}

			case JFFS2_NODETYPE_DIRENT: {
				struct jffs2_sum_dirent_flash *spd;
				spd = sp;

				dbg_summary("Dirent at 0x%08x\n",
							jeb->offset + je32_to_cpu(spd->offset));

				fd = jffs2_alloc_full_dirent(spd->nsize+1);
				if (!fd) {
					kfree(summary);
					return -ENOMEM;
				}

				memcpy(&fd->name, spd->name, spd->nsize);
				fd->name[spd->nsize] = 0;

				raw = jffs2_alloc_raw_node_ref();
				if (!raw) {
					jffs2_free_full_dirent(fd);
					JFFS2_NOTICE("allocation of node reference failed\n");
					kfree(summary);
					return -ENOMEM;
				}

				ic = jffs2_scan_make_ino_cache(c, je32_to_cpu(spd->pino));
				if (!ic) {
					jffs2_free_full_dirent(fd);
					jffs2_free_raw_node_ref(raw);
					kfree(summary);
					return -ENOMEM;
				}

				raw->__totlen = PAD(je32_to_cpu(spd->totlen));
				raw->flash_offset = (jeb->offset + je32_to_cpu(spd->offset)) | REF_PRISTINE;
				raw->next_phys = NULL;
				raw->next_in_ino = ic->nodes;
				ic->nodes = raw;
				if (!jeb->first_node)
					jeb->first_node = raw;
				if (jeb->last_node)
					jeb->last_node->next_phys = raw;
				jeb->last_node = raw;

				fd->raw = raw;
				fd->next = NULL;
				fd->version = je32_to_cpu(spd->version);
				fd->ino = je32_to_cpu(spd->ino);
				fd->nhash = full_name_hash(fd->name, spd->nsize);
				fd->type = spd->type;
				USED_SPACE(PAD(je32_to_cpu(spd->totlen)));
				jffs2_add_fd_to_list(c, fd, &ic->scan_dents);

				*pseudo_random += je32_to_cpu(spd->version);

				sp += JFFS2_SUMMARY_DIRENT_SIZE(spd->nsize);

				break;
			}

			default : {
				JFFS2_WARNING("Unsupported node type found in summary! Exiting...");
				kfree(summary);
				return -EIO;
			}
		}
	}

	kfree(summary);
	return 0;
}

void dump_sum_records()
{

	struct jffs2_raw_summary isum;
	struct jffs2_sum_marker *sm;
	union jffs2_sum_mem *temp;
	jint32_t offset;
	jint32_t *tpage;
	void *wpage;
	int datasize, infosize, padsize;
	jint32_t magic = cpu_to_je32(JFFS2_SUM_MAGIC);

	if (!sum_collected->sum_num || !sum_collected->sum_list_head)
		return;

	datasize = sum_collected->sum_size + sizeof(struct jffs2_sum_marker);
	infosize = sizeof(struct jffs2_raw_summary) + datasize;
	padsize = erase_block_size - data_ofs - infosize;
	infosize += padsize; datasize += padsize;
	offset = cpu_to_je32(data_ofs);

	tpage = (jint32_t *) malloc(datasize);

	if(!tpage)
		error_msg_and_die("Can't allocate memory to dump summary information!\n");

	memset(tpage, 0xff, datasize);
	memset(&isum, 0, sizeof(isum));

	isum.magic = cpu_to_je16(JFFS2_MAGIC_BITMASK);
	isum.nodetype = cpu_to_je16(JFFS2_NODETYPE_SUMMARY);
	isum.totlen = cpu_to_je32(infosize);
	isum.hdr_crc = cpu_to_je32(crc32(0, &isum, sizeof(struct jffs2_unknown_node) - 4));
	isum.padded = cpu_to_je32(0);

	if (add_cleanmarkers && found_cleanmarkers) {
		isum.cln_mkr = cpu_to_je32(cleanmarker_size);
	} else {
		isum.cln_mkr = cpu_to_je32(0);
	}

	isum.sum_num = cpu_to_je32(sum_collected->sum_num);
	wpage = tpage;

	while (sum_collected->sum_num) {
		switch(je16_to_cpu(sum_collected->sum_list_head->u.nodetype)) {

			case JFFS2_NODETYPE_INODE : {
											struct jffs2_sum_inode_flash *sino_ptr = wpage;

											sino_ptr->nodetype = sum_collected->sum_list_head->i.nodetype;
											sino_ptr->inode = sum_collected->sum_list_head->i.inode;
											sino_ptr->version = sum_collected->sum_list_head->i.version;
											sino_ptr->offset = sum_collected->sum_list_head->i.offset;
											sino_ptr->totlen = sum_collected->sum_list_head->i.totlen;

											wpage += JFFS2_SUMMARY_INODE_SIZE;
											break;
										}

			case JFFS2_NODETYPE_DIRENT : {
											 struct jffs2_sum_dirent_flash *sdrnt_ptr = wpage;

											 sdrnt_ptr->nodetype = sum_collected->sum_list_head->d.nodetype;
											 sdrnt_ptr->totlen = sum_collected->sum_list_head->d.totlen;
											 sdrnt_ptr->offset = sum_collected->sum_list_head->d.offset;
											 sdrnt_ptr->pino = sum_collected->sum_list_head->d.pino;
											 sdrnt_ptr->version = sum_collected->sum_list_head->d.version;
											 sdrnt_ptr->ino = sum_collected->sum_list_head->d.ino;
											 sdrnt_ptr->nsize = sum_collected->sum_list_head->d.nsize;
											 sdrnt_ptr->type = sum_collected->sum_list_head->d.type;

											 memcpy(sdrnt_ptr->name, sum_collected->sum_list_head->d.name,
													 sum_collected->sum_list_head->d.nsize);

											 wpage += JFFS2_SUMMARY_DIRENT_SIZE(sum_collected->sum_list_head->d.nsize);
											 break;
										 }

			case JFFS2_NODETYPE_XATTR: {
										   struct jffs2_sum_xattr_flash *sxattr_ptr = wpage;

										   sxattr_ptr->nodetype = sum_collected->sum_list_head->x.nodetype;
										   sxattr_ptr->xid = sum_collected->sum_list_head->x.xid;
										   sxattr_ptr->version = sum_collected->sum_list_head->x.version;
										   sxattr_ptr->offset = sum_collected->sum_list_head->x.offset;
										   sxattr_ptr->totlen = sum_collected->sum_list_head->x.totlen;

										   wpage += JFFS2_SUMMARY_XATTR_SIZE;
										   break;
									   }

			case JFFS2_NODETYPE_XREF: {
										  struct jffs2_sum_xref_flash *sxref_ptr = wpage;

										  sxref_ptr->nodetype = sum_collected->sum_list_head->r.nodetype;
										  sxref_ptr->offset = sum_collected->sum_list_head->r.offset;

										  wpage += JFFS2_SUMMARY_XREF_SIZE;
										  break;
//.........这里部分代码省略.........