Lines Matching refs:fs
32 blk_t ext2fs_descriptor_block_loc(ext2_filsys fs, blk_t group_block, dgrp_t i)
38 if (!(fs->super->s_feature_incompat & EXT2_FEATURE_INCOMPAT_META_BG) ||
39 (i < fs->super->s_first_meta_bg))
42 bg = EXT2_DESC_PER_BLOCK(fs->super) * i;
43 if (ext2fs_bg_has_super(fs, bg))
45 ret_blk = ext2fs_group_first_block(fs, bg) + has_super;
54 if (group_block != fs->super->s_first_data_block &&
55 ((ret_blk + fs->super->s_blocks_per_group) <
56 fs->super->s_blocks_count))
57 ret_blk += fs->super->s_blocks_per_group;
85 ext2_filsys fs;
99 retval = ext2fs_get_mem(sizeof(struct struct_ext2_filsys), &fs);
103 memset(fs, 0, sizeof(struct struct_ext2_filsys));
104 fs->magic = EXT2_ET_MAGIC_EXT2FS_FILSYS;
105 fs->flags = flags;
107 fs->flags |= EXT2_FLAG_MASTER_SB_ONLY;
108 fs->umask = 022;
109 retval = ext2fs_get_mem(strlen(name)+1, &fs->device_name);
112 strcpy(fs->device_name, name);
113 cp = strchr(fs->device_name, '?');
124 retval = manager->open(fs->device_name, io_flags, &fs->io);
128 (retval = io_channel_set_options(fs->io, io_options)))
130 fs->image_io = fs->io;
131 fs->io->app_data = fs;
132 retval = ext2fs_get_mem(SUPERBLOCK_SIZE, &fs->super);
137 &fs->image_header);
140 retval = io_channel_read_blk(fs->io, 0,
142 fs->image_header);
145 if (fs->image_header->magic_number != EXT2_ET_MAGIC_E2IMAGE)
148 block_size = fs->image_header->fs_blocksize;
165 io_channel_set_blksize(fs->io, block_size);
167 fs->orig_super = 0;
169 io_channel_set_blksize(fs->io, SUPERBLOCK_OFFSET);
172 retval = ext2fs_get_mem(SUPERBLOCK_SIZE, &fs->orig_super);
176 retval = io_channel_read_blk(fs->io, superblock, -SUPERBLOCK_SIZE,
177 fs->super);
180 if (fs->orig_super)
181 memcpy(fs->orig_super, fs->super, SUPERBLOCK_SIZE);
184 fs->flags |= EXT2_FLAG_SWAP_BYTES;
185 ext2fs_swap_super(fs->super);
187 if (fs->flags & EXT2_FLAG_SWAP_BYTES) {
193 if (fs->super->s_magic != EXT2_SUPER_MAGIC) {
197 if (fs->super->s_rev_level > EXT2_LIB_CURRENT_REV) {
206 features = fs->super->s_feature_incompat;
216 features = fs->super->s_feature_ro_compat;
228 (fs->super->s_feature_incompat &
235 if ((fs->super->s_log_block_size + EXT2_MIN_BLOCK_LOG_SIZE) >
240 fs->blocksize = EXT2_BLOCK_SIZE(fs->super);
241 if (EXT2_INODE_SIZE(fs->super) < EXT2_GOOD_OLD_INODE_SIZE) {
245 fs->fragsize = EXT2_FRAG_SIZE(fs->super);
246 fs->inode_blocks_per_group = ((EXT2_INODES_PER_GROUP(fs->super) *
247 EXT2_INODE_SIZE(fs->super) +
248 EXT2_BLOCK_SIZE(fs->super) - 1) /
249 EXT2_BLOCK_SIZE(fs->super));
251 if (block_size != fs->blocksize) {
259 io_channel_set_blksize(fs->io, fs->blocksize);
265 if (fs->super->s_feature_incompat &
267 fs->group_desc_count = 0;
268 *ret_fs = fs;
272 if (EXT2_INODES_PER_GROUP(fs->super) == 0) {
280 blocks_per_group = EXT2_BLOCKS_PER_GROUP(fs->super);
282 blocks_per_group > EXT2_MAX_BLOCKS_PER_GROUP(fs->super) ||
283 fs->inode_blocks_per_group > EXT2_MAX_INODES_PER_GROUP(fs->super) ||
284 EXT2_DESC_PER_BLOCK(fs->super) == 0 ||
285 fs->super->s_first_data_block >= fs->super->s_blocks_count) {
289 fs->group_desc_count = ext2fs_div_ceil(fs->super->s_blocks_count -
290 fs->super->s_first_data_block,
292 if (fs->group_desc_count * EXT2_INODES_PER_GROUP(fs->super) !=
293 fs->super->s_inodes_count) {
297 fs->desc_blocks = ext2fs_div_ceil(fs->group_desc_count,
298 EXT2_DESC_PER_BLOCK(fs->super));
299 retval = ext2fs_get_array(fs->desc_blocks, fs->blocksize,
300 &fs->group_desc);
304 group_block = fs->super->s_first_data_block;
305 dest = (char *) fs->group_desc;
306 groups_per_block = EXT2_DESC_PER_BLOCK(fs->super);
307 if (fs->super->s_feature_incompat & EXT2_FEATURE_INCOMPAT_META_BG)
308 first_meta_bg = fs->super->s_first_meta_bg;
310 first_meta_bg = fs->desc_blocks;
312 retval = io_channel_read_blk(fs->io, group_block+1,
321 dest += fs->blocksize*first_meta_bg;
323 for (i=first_meta_bg ; i < fs->desc_blocks; i++) {
324 blk = ext2fs_descriptor_block_loc(fs, group_block, i);
325 retval = io_channel_read_blk(fs->io, blk, 1, dest);
333 dest += fs->blocksize;
336 fs->stride = fs->super->s_raid_stride;
342 if (superblock > 1 && EXT2_HAS_RO_COMPAT_FEATURE(fs->super,
345 for (i = 0, gd = fs->group_desc; i < fs->group_desc_count;
351 ext2fs_mark_super_dirty(fs);
354 fs->flags &= ~EXT2_FLAG_NOFREE_ON_ERROR;
355 *ret_fs = fs;
359 *ret_fs = fs;
361 ext2fs_free(fs);
370 errcode_t ext2fs_get_data_io(ext2_filsys fs, io_channel *old_io)
372 if ((fs->flags & EXT2_FLAG_IMAGE_FILE) == 0)
375 *old_io = (fs->image_io == fs->io) ? 0 : fs->io;
380 errcode_t ext2fs_set_data_io(ext2_filsys fs, io_channel new_io)
382 if ((fs->flags & EXT2_FLAG_IMAGE_FILE) == 0)
384 fs->io = new_io ? new_io : fs->image_io;
388 errcode_t ext2fs_rewrite_to_io(ext2_filsys fs, io_channel new_io)
390 if ((fs->flags & EXT2_FLAG_IMAGE_FILE) == 0)
392 fs->io = fs->image_io = new_io;
393 fs->flags |= EXT2_FLAG_DIRTY | EXT2_FLAG_RW |
395 fs->flags &= ~EXT2_FLAG_IMAGE_FILE;
