32 blk_t ext2fs_descriptor_block_loc(ext2_filsys fs, blk_t group_block, dgrp_t i)  in ext2fs_descriptor_block_loc()  argument
38 	if (!(fs->super->s_feature_incompat & EXT2_FEATURE_INCOMPAT_META_BG) ||  in ext2fs_descriptor_block_loc()
39 	    (i < fs->super->s_first_meta_bg))  in ext2fs_descriptor_block_loc()
42 	bg = EXT2_DESC_PER_BLOCK(fs->super) * i;  in ext2fs_descriptor_block_loc()
43 	if (ext2fs_bg_has_super(fs, bg))  in ext2fs_descriptor_block_loc()
45 	ret_blk = ext2fs_group_first_block(fs, bg) + has_super;  in ext2fs_descriptor_block_loc()
54 	if (group_block != fs->super->s_first_data_block &&  in ext2fs_descriptor_block_loc()
55 	    ((ret_blk + fs->super->s_blocks_per_group) <  in ext2fs_descriptor_block_loc()
56 	     fs->super->s_blocks_count))  in ext2fs_descriptor_block_loc()
57 		ret_blk += fs->super->s_blocks_per_group;  in ext2fs_descriptor_block_loc()
85 	ext2_filsys	fs;  in ext2fs_open2()  local
99 	retval = ext2fs_get_mem(sizeof(struct struct_ext2_filsys), &fs);  in ext2fs_open2()
103 	memset(fs, 0, sizeof(struct struct_ext2_filsys));  in ext2fs_open2()
104 	fs->magic = EXT2_ET_MAGIC_EXT2FS_FILSYS;  in ext2fs_open2()
105 	fs->flags = flags;  in ext2fs_open2()
107 	fs->flags |= EXT2_FLAG_MASTER_SB_ONLY;  in ext2fs_open2()
108 	fs->umask = 022;  in ext2fs_open2()
109 	retval = ext2fs_get_mem(strlen(name)+1, &fs->device_name);  in ext2fs_open2()
112 	strcpy(fs->device_name, name);  in ext2fs_open2()
113 	cp = strchr(fs->device_name, '?');  in ext2fs_open2()
126 	retval = manager->open(fs->device_name, io_flags, &fs->io);  in ext2fs_open2()
130 	    (retval = io_channel_set_options(fs->io, io_options)))  in ext2fs_open2()
132 	fs->image_io = fs->io;  in ext2fs_open2()
133 	fs->io->app_data = fs;  in ext2fs_open2()
134 	retval = ext2fs_get_memalign(SUPERBLOCK_SIZE, 512, &fs->super);  in ext2fs_open2()
139 					&fs->image_header);  in ext2fs_open2()
142 		retval = io_channel_read_blk(fs->io, 0,  in ext2fs_open2()
144 					     fs->image_header);  in ext2fs_open2()
147 		if (fs->image_header->magic_number != EXT2_ET_MAGIC_E2IMAGE)  in ext2fs_open2()
150 		block_size = fs->image_header->fs_blocksize;  in ext2fs_open2()
167 		io_channel_set_blksize(fs->io, block_size);  in ext2fs_open2()
169 		fs->orig_super = 0;  in ext2fs_open2()
171 		io_channel_set_blksize(fs->io, SUPERBLOCK_OFFSET);  in ext2fs_open2()
174 		retval = ext2fs_get_mem(SUPERBLOCK_SIZE, &fs->orig_super);  in ext2fs_open2()
178 	retval = io_channel_read_blk(fs->io, superblock, -SUPERBLOCK_SIZE,  in ext2fs_open2()
179 				     fs->super);  in ext2fs_open2()
182 	if (fs->orig_super)  in ext2fs_open2()
183 		memcpy(fs->orig_super, fs->super, SUPERBLOCK_SIZE);  in ext2fs_open2()
186 	fs->flags |= EXT2_FLAG_SWAP_BYTES;  in ext2fs_open2()
187 	ext2fs_swap_super(fs->super);  in ext2fs_open2()
189 	if (fs->flags & EXT2_FLAG_SWAP_BYTES) {  in ext2fs_open2()
195 	if (fs->super->s_magic != EXT2_SUPER_MAGIC) {  in ext2fs_open2()
199 	if (fs->super->s_rev_level > EXT2_LIB_CURRENT_REV) {  in ext2fs_open2()
208 		features = fs->super->s_feature_incompat;  in ext2fs_open2()
218 		features = fs->super->s_feature_ro_compat;  in ext2fs_open2()
230 		    (fs->super->s_feature_incompat &  in ext2fs_open2()
237 	if ((fs->super->s_log_block_size + EXT2_MIN_BLOCK_LOG_SIZE) >  in ext2fs_open2()
242 	fs->blocksize = EXT2_BLOCK_SIZE(fs->super);  in ext2fs_open2()
243 	if (EXT2_INODE_SIZE(fs->super) < EXT2_GOOD_OLD_INODE_SIZE) {  in ext2fs_open2()
247 	fs->fragsize = EXT2_FRAG_SIZE(fs->super);  in ext2fs_open2()
248 	fs->inode_blocks_per_group = ((EXT2_INODES_PER_GROUP(fs->super) *  in ext2fs_open2()
249 				       EXT2_INODE_SIZE(fs->super) +  in ext2fs_open2()
250 				       EXT2_BLOCK_SIZE(fs->super) - 1) /  in ext2fs_open2()
251 				      EXT2_BLOCK_SIZE(fs->super));  in ext2fs_open2()
253 		if (block_size != fs->blocksize) {  in ext2fs_open2()
261 	io_channel_set_blksize(fs->io, fs->blocksize);  in ext2fs_open2()
267 	if (fs->super->s_feature_incompat &  in ext2fs_open2()
269 		fs->group_desc_count = 0;  in ext2fs_open2()
270 		*ret_fs = fs;  in ext2fs_open2()
274 	if (EXT2_INODES_PER_GROUP(fs->super) == 0) {  in ext2fs_open2()
282 	blocks_per_group = EXT2_BLOCKS_PER_GROUP(fs->super);  in ext2fs_open2()
284 	    blocks_per_group > EXT2_MAX_BLOCKS_PER_GROUP(fs->super) ||  in ext2fs_open2()
285 	    fs->inode_blocks_per_group > EXT2_MAX_INODES_PER_GROUP(fs->super) ||  in ext2fs_open2()
286            EXT2_DESC_PER_BLOCK(fs->super) == 0 ||  in ext2fs_open2()
287            fs->super->s_first_data_block >= fs->super->s_blocks_count) {  in ext2fs_open2()
291 	fs->group_desc_count = ext2fs_div_ceil(fs->super->s_blocks_count -  in ext2fs_open2()
292 					       fs->super->s_first_data_block,  in ext2fs_open2()
294        if (fs->group_desc_count * EXT2_INODES_PER_GROUP(fs->super) !=  in ext2fs_open2()
295            fs->super->s_inodes_count) {  in ext2fs_open2()
299 	fs->desc_blocks = ext2fs_div_ceil(fs->group_desc_count,  in ext2fs_open2()
300 					  EXT2_DESC_PER_BLOCK(fs->super));  in ext2fs_open2()
301 	retval = ext2fs_get_array(fs->desc_blocks, fs->blocksize,  in ext2fs_open2()
302 				&fs->group_desc);  in ext2fs_open2()
306 		group_block = fs->super->s_first_data_block;  in ext2fs_open2()
307 	dest = (char *) fs->group_desc;  in ext2fs_open2()
308 	groups_per_block = EXT2_DESC_PER_BLOCK(fs->super);  in ext2fs_open2()
309 	if (fs->super->s_feature_incompat & EXT2_FEATURE_INCOMPAT_META_BG)  in ext2fs_open2()
310 		first_meta_bg = fs->super->s_first_meta_bg;  in ext2fs_open2()
312 		first_meta_bg = fs->desc_blocks;  in ext2fs_open2()
314 		retval = io_channel_read_blk(fs->io, group_block+1,  in ext2fs_open2()
323 		dest += fs->blocksize*first_meta_bg;  in ext2fs_open2()
325 	for (i=first_meta_bg ; i < fs->desc_blocks; i++) {  in ext2fs_open2()
326 		blk = ext2fs_descriptor_block_loc(fs, group_block, i);  in ext2fs_open2()
327 		retval = io_channel_read_blk(fs->io, blk, 1, dest);  in ext2fs_open2()
335 		dest += fs->blocksize;  in ext2fs_open2()
338 	fs->stride = fs->super->s_raid_stride;  in ext2fs_open2()
344 	if (superblock > 1 && EXT2_HAS_RO_COMPAT_FEATURE(fs->super,  in ext2fs_open2()
347 		for (i = 0, gd = fs->group_desc; i < fs->group_desc_count;  in ext2fs_open2()
353 		ext2fs_mark_super_dirty(fs);  in ext2fs_open2()
356 	fs->flags &= ~EXT2_FLAG_NOFREE_ON_ERROR;  in ext2fs_open2()
357 	*ret_fs = fs;  in ext2fs_open2()
361 		*ret_fs = fs;  in ext2fs_open2()
363 		ext2fs_free(fs);  in ext2fs_open2()
372 errcode_t ext2fs_get_data_io(ext2_filsys fs, io_channel *old_io)  in ext2fs_get_data_io()  argument
374 	if ((fs->flags & EXT2_FLAG_IMAGE_FILE) == 0)  in ext2fs_get_data_io()
377 		*old_io = (fs->image_io == fs->io) ? 0 : fs->io;  in ext2fs_get_data_io()
382 errcode_t ext2fs_set_data_io(ext2_filsys fs, io_channel new_io)  in ext2fs_set_data_io()  argument
384 	if ((fs->flags & EXT2_FLAG_IMAGE_FILE) == 0)  in ext2fs_set_data_io()
386 	fs->io = new_io ? new_io : fs->image_io;  in ext2fs_set_data_io()
390 errcode_t ext2fs_rewrite_to_io(ext2_filsys fs, io_channel new_io)  in ext2fs_rewrite_to_io()  argument
392 	if ((fs->flags & EXT2_FLAG_IMAGE_FILE) == 0)  in ext2fs_rewrite_to_io()
394 	fs->io = fs->image_io = new_io;  in ext2fs_rewrite_to_io()
395 	fs->flags |= EXT2_FLAG_DIRTY | EXT2_FLAG_RW |  in ext2fs_rewrite_to_io()
397 	fs->flags &= ~EXT2_FLAG_IMAGE_FILE;  in ext2fs_rewrite_to_io()