2  * image.c --- writes out the critical parts of the filesystem as a
10  * %Begin-Header%
13  * %End-Header%
52 		left--;  in check_zero_block()
62 errcode_t ext2fs_image_inode_write(ext2_filsys fs, int fd, int flags)  in ext2fs_image_inode_write()  argument
71 	buf = malloc(fs->blocksize * BUF_BLOCKS);  in ext2fs_image_inode_write()
75 	for (group = 0; group < fs->group_desc_count; group++) {  in ext2fs_image_inode_write()
76 		blk = ext2fs_inode_table_loc(fs, (unsigned)group);  in ext2fs_image_inode_write()
81 		left = fs->inode_blocks_per_group;  in ext2fs_image_inode_write()
86 			retval = io_channel_read_blk64(fs->io, blk, c, buf);  in ext2fs_image_inode_write()
96 				if (check_zero_block(cp, fs->blocksize)) {  in ext2fs_image_inode_write()
97 					c--;  in ext2fs_image_inode_write()
99 					left--;  in ext2fs_image_inode_write()
100 					cp += fs->blocksize;  in ext2fs_image_inode_write()
101 					r = ext2fs_llseek(fd, fs->blocksize,  in ext2fs_image_inode_write()
109 				/* Find non-zero blocks */  in ext2fs_image_inode_write()
111 					if (check_zero_block(cp + d*fs->blocksize, fs->blocksize))  in ext2fs_image_inode_write()
115 				actual = write(fd, cp, fs->blocksize * d);  in ext2fs_image_inode_write()
116 				if (actual == -1) {  in ext2fs_image_inode_write()
120 				if (actual != (ssize_t) (fs->blocksize * d)) {  in ext2fs_image_inode_write()
125 				left -= d;  in ext2fs_image_inode_write()
126 				cp += fs->blocksize * d;  in ext2fs_image_inode_write()
127 				c -= d;  in ext2fs_image_inode_write()
141 errcode_t ext2fs_image_inode_read(ext2_filsys fs, int fd,  in ext2fs_image_inode_read()  argument
150 	buf = malloc(fs->blocksize * BUF_BLOCKS);  in ext2fs_image_inode_read()
154 	for (group = 0; group < fs->group_desc_count; group++) {  in ext2fs_image_inode_read()
155 		blk = ext2fs_inode_table_loc(fs, (unsigned)group);  in ext2fs_image_inode_read()
160 		left = fs->inode_blocks_per_group;  in ext2fs_image_inode_read()
165 			actual = read(fd, buf, fs->blocksize * c);  in ext2fs_image_inode_read()
166 			if (actual == -1) {  in ext2fs_image_inode_read()
170 			if (actual != (ssize_t) (fs->blocksize * c)) {  in ext2fs_image_inode_read()
174 			retval = io_channel_write_blk64(fs->io, blk, c, buf);  in ext2fs_image_inode_read()
179 			left -= c;  in ext2fs_image_inode_read()
182 	retval = ext2fs_flush_icache(fs);  in ext2fs_image_inode_read()
192 errcode_t ext2fs_image_super_write(ext2_filsys fs, int fd,  in ext2fs_image_super_write()  argument
204 	buf = malloc(fs->blocksize);  in ext2fs_image_super_write()
211 	memset(buf, 0, fs->blocksize);  in ext2fs_image_super_write()
217 	ext2fs_swap_super(fs->super);  in ext2fs_image_super_write()
218 	memcpy(buf, fs->super, SUPERBLOCK_SIZE);  in ext2fs_image_super_write()
219 	ext2fs_swap_super(fs->super);  in ext2fs_image_super_write()
221 	memcpy(buf, fs->super, SUPERBLOCK_SIZE);  in ext2fs_image_super_write()
223 	actual = write(fd, buf, fs->blocksize);  in ext2fs_image_super_write()
224 	if (actual == -1) {  in ext2fs_image_super_write()
228 	if (actual != (ssize_t) fs->blocksize) {  in ext2fs_image_super_write()
237 	cp = (char *) fs->group_desc;  in ext2fs_image_super_write()
244 	groups_per_block = EXT2_DESC_PER_BLOCK(fs->super);  in ext2fs_image_super_write()
246 	for (j=0; j < groups_per_block*fs->desc_blocks; j++) {  in ext2fs_image_super_write()
247 		gdp = ext2fs_group_desc(fs, fs->group_desc, j);  in ext2fs_image_super_write()
248 		ext2fs_swap_group_desc2(fs, gdp);  in ext2fs_image_super_write()
252 	actual = write(fd, cp, fs->blocksize * fs->desc_blocks);  in ext2fs_image_super_write()
256 	groups_per_block = EXT2_DESC_PER_BLOCK(fs->super);  in ext2fs_image_super_write()
258 	for (j=0; j < groups_per_block*fs->desc_blocks; j++) {  in ext2fs_image_super_write()
259 		gdp = ext2fs_group_desc(fs, fs->group_desc, j);  in ext2fs_image_super_write()
260 		ext2fs_swap_group_desc2(fs, gdp);  in ext2fs_image_super_write()
264 	if (actual == -1) {  in ext2fs_image_super_write()
268 	if (actual != (ssize_t) (fs->blocksize * fs->desc_blocks)) {  in ext2fs_image_super_write()
283 errcode_t ext2fs_image_super_read(ext2_filsys fs, int fd,  in ext2fs_image_super_read()  argument
290 	size = fs->blocksize * (fs->group_desc_count + 1);  in ext2fs_image_super_read()
299 	if (actual == -1) {  in ext2fs_image_super_read()
311 	memcpy(fs->super, buf, SUPERBLOCK_SIZE);  in ext2fs_image_super_read()
313 	memcpy(fs->group_desc, buf + fs->blocksize,  in ext2fs_image_super_read()
314 	       fs->blocksize * fs->group_desc_count);  in ext2fs_image_super_read()
326 errcode_t ext2fs_image_bitmap_write(ext2_filsys fs, int fd, int flags)  in ext2fs_image_bitmap_write()  argument
336 		if (!fs->inode_map) {  in ext2fs_image_bitmap_write()
337 			retval = ext2fs_read_inode_bitmap(fs);  in ext2fs_image_bitmap_write()
341 		bmap = fs->inode_map;  in ext2fs_image_bitmap_write()
343 		cnt = EXT2_INODES_PER_GROUP(fs->super) * fs->group_desc_count;  in ext2fs_image_bitmap_write()
344 		size = (EXT2_INODES_PER_GROUP(fs->super) / 8);  in ext2fs_image_bitmap_write()
346 		if (!fs->block_map) {  in ext2fs_image_bitmap_write()
347 			retval = ext2fs_read_block_bitmap(fs);  in ext2fs_image_bitmap_write()
351 		bmap = fs->block_map;  in ext2fs_image_bitmap_write()
352 		itr = fs->super->s_first_data_block;  in ext2fs_image_bitmap_write()
353 		cnt = EXT2_GROUPS_TO_CLUSTERS(fs->super, fs->group_desc_count);  in ext2fs_image_bitmap_write()
354 		size = EXT2_CLUSTERS_PER_GROUP(fs->super) / 8;  in ext2fs_image_bitmap_write()
356 	total_size = size * fs->group_desc_count;  in ext2fs_image_bitmap_write()
369 		if (actual == -1)  in ext2fs_image_bitmap_write()
375 		cnt -= size << 3;  in ext2fs_image_bitmap_write()
378 	size = total_size % fs->blocksize;  in ext2fs_image_bitmap_write()
381 		size = fs->blocksize - size;  in ext2fs_image_bitmap_write()
391 			size -= c;  in ext2fs_image_bitmap_write()
401 errcode_t ext2fs_image_bitmap_read(ext2_filsys fs, int fd, int flags)  in ext2fs_image_bitmap_read()  argument
411 		if (!fs->inode_map) {  in ext2fs_image_bitmap_read()
412 			retval = ext2fs_read_inode_bitmap(fs);  in ext2fs_image_bitmap_read()
416 		bmap = fs->inode_map;  in ext2fs_image_bitmap_read()
418 		cnt = EXT2_INODES_PER_GROUP(fs->super) * fs->group_desc_count;  in ext2fs_image_bitmap_read()
419 		size = (EXT2_INODES_PER_GROUP(fs->super) / 8);  in ext2fs_image_bitmap_read()
421 		if (!fs->block_map) {  in ext2fs_image_bitmap_read()
422 			retval = ext2fs_read_block_bitmap(fs);  in ext2fs_image_bitmap_read()
426 		bmap = fs->block_map;  in ext2fs_image_bitmap_read()
427 		itr = fs->super->s_first_data_block;  in ext2fs_image_bitmap_read()
428 		cnt = EXT2_GROUPS_TO_BLOCKS(fs->super, fs->group_desc_count);  in ext2fs_image_bitmap_read()
429 		size = EXT2_BLOCKS_PER_GROUP(fs->super) / 8;  in ext2fs_image_bitmap_read()
438 		if (actual == -1)  in ext2fs_image_bitmap_read()
449 		cnt -= size << 3;  in ext2fs_image_bitmap_read()