Lines Matching refs:fs
35 blk64_t ext2fs_descriptor_block_loc2(ext2_filsys fs, blk64_t group_block,
42 if (!(fs->super->s_feature_incompat & EXT2_FEATURE_INCOMPAT_META_BG) ||
43 (i < fs->super->s_first_meta_bg))
46 bg = EXT2_DESC_PER_BLOCK(fs->super) * i;
47 if (ext2fs_bg_has_super(fs, bg))
49 ret_blk = ext2fs_group_first_block2(fs, bg) + has_super;
58 if (group_block != fs->super->s_first_data_block &&
59 ((ret_blk + fs->super->s_blocks_per_group) <
60 ext2fs_blocks_count(fs->super)))
61 ret_blk += fs->super->s_blocks_per_group;
65 blk_t ext2fs_descriptor_block_loc(ext2_filsys fs, blk_t group_block, dgrp_t i)
67 return ext2fs_descriptor_block_loc2(fs, group_block, i);
97 ext2_filsys fs;
112 retval = ext2fs_get_mem(sizeof(struct struct_ext2_filsys), &fs);
116 memset(fs, 0, sizeof(struct struct_ext2_filsys));
117 fs->magic = EXT2_ET_MAGIC_EXT2FS_FILSYS;
118 fs->flags = flags;
120 fs->flags |= EXT2_FLAG_MASTER_SB_ONLY;
121 fs->umask = 022;
122 retval = ext2fs_get_mem(strlen(name)+1, &fs->device_name);
125 strcpy(fs->device_name, name);
126 cp = strchr(fs->device_name, '?');
139 retval = manager->open(fs->device_name, io_flags, &fs->io);
143 (retval = io_channel_set_options(fs->io, io_options)))
145 fs->image_io = fs->io;
146 fs->io->app_data = fs;
147 retval = io_channel_alloc_buf(fs->io, -SUPERBLOCK_SIZE, &fs->super);
152 &fs->image_header);
155 retval = io_channel_read_blk(fs->io, 0,
157 fs->image_header);
160 if (fs->image_header->magic_number != EXT2_ET_MAGIC_E2IMAGE)
163 block_size = fs->image_header->fs_blocksize;
180 io_channel_set_blksize(fs->io, block_size);
182 fs->orig_super = 0;
184 io_channel_set_blksize(fs->io, SUPERBLOCK_OFFSET);
187 retval = ext2fs_get_mem(SUPERBLOCK_SIZE, &fs->orig_super);
191 retval = io_channel_read_blk(fs->io, superblock, -SUPERBLOCK_SIZE,
192 fs->super);
195 if (fs->orig_super)
196 memcpy(fs->orig_super, fs->super, SUPERBLOCK_SIZE);
199 fs->flags |= EXT2_FLAG_SWAP_BYTES;
200 ext2fs_swap_super(fs->super);
202 if (fs->flags & EXT2_FLAG_SWAP_BYTES) {
208 if (fs->super->s_magic != EXT2_SUPER_MAGIC) {
212 if (fs->super->s_rev_level > EXT2_LIB_CURRENT_REV) {
221 features = fs->super->s_feature_incompat;
231 features = fs->super->s_feature_ro_compat;
243 (fs->super->s_feature_incompat &
250 if ((fs->super->s_log_block_size + EXT2_MIN_BLOCK_LOG_SIZE) >
260 if (EXT2_HAS_RO_COMPAT_FEATURE(fs->super,
267 if (!EXT2_HAS_RO_COMPAT_FEATURE(fs->super,
269 (fs->super->s_log_block_size != fs->super->s_log_cluster_size)) {
273 fs->fragsize = fs->blocksize = EXT2_BLOCK_SIZE(fs->super);
274 if (EXT2_INODE_SIZE(fs->super) < EXT2_GOOD_OLD_INODE_SIZE) {
278 fs->cluster_ratio_bits = fs->super->s_log_cluster_size -
279 fs->super->s_log_block_size;
280 if (EXT2_BLOCKS_PER_GROUP(fs->super) !=
281 EXT2_CLUSTERS_PER_GROUP(fs->super) << fs->cluster_ratio_bits) {
285 fs->inode_blocks_per_group = ((EXT2_INODES_PER_GROUP(fs->super) *
286 EXT2_INODE_SIZE(fs->super) +
287 EXT2_BLOCK_SIZE(fs->super) - 1) /
288 EXT2_BLOCK_SIZE(fs->super));
290 if (block_size != fs->blocksize) {
298 io_channel_set_blksize(fs->io, fs->blocksize);
304 if (fs->super->s_feature_incompat &
306 fs->group_desc_count = 0;
307 *ret_fs = fs;
311 if (EXT2_INODES_PER_GROUP(fs->super) == 0) {
319 blocks_per_group = EXT2_BLOCKS_PER_GROUP(fs->super);
321 blocks_per_group > EXT2_MAX_BLOCKS_PER_GROUP(fs->super) ||
322 fs->inode_blocks_per_group > EXT2_MAX_INODES_PER_GROUP(fs->super) ||
323 EXT2_DESC_PER_BLOCK(fs->super) == 0 ||
324 fs->super->s_first_data_block >= ext2fs_blocks_count(fs->super)) {
328 fs->group_desc_count = ext2fs_div64_ceil(ext2fs_blocks_count(fs->super) -
329 fs->super->s_first_data_block,
331 if (fs->group_desc_count * EXT2_INODES_PER_GROUP(fs->super) !=
332 fs->super->s_inodes_count) {
336 fs->desc_blocks = ext2fs_div_ceil(fs->group_desc_count,
337 EXT2_DESC_PER_BLOCK(fs->super));
338 retval = ext2fs_get_array(fs->desc_blocks, fs->blocksize,
339 &fs->group_desc);
343 group_block = fs->super->s_first_data_block;
344 if (group_block == 0 && fs->blocksize == 1024)
346 dest = (char *) fs->group_desc;
348 groups_per_block = EXT2_DESC_PER_BLOCK(fs->super);
350 if (fs->super->s_feature_incompat & EXT2_FEATURE_INCOMPAT_META_BG)
351 first_meta_bg = fs->super->s_first_meta_bg;
353 first_meta_bg = fs->desc_blocks;
355 retval = io_channel_read_blk(fs->io, group_block+1,
362 gdp = ext2fs_group_desc(fs, fs->group_desc, j);
363 ext2fs_swap_group_desc2(fs, gdp);
366 dest += fs->blocksize*first_meta_bg;
368 for (i=first_meta_bg ; i < fs->desc_blocks; i++) {
369 blk = ext2fs_descriptor_block_loc2(fs, group_block, i);
370 retval = io_channel_read_blk64(fs->io, blk, 1, dest);
375 gdp = ext2fs_group_desc(fs, fs->group_desc,
377 ext2fs_swap_group_desc2(fs, gdp);
380 dest += fs->blocksize;
383 fs->stride = fs->super->s_raid_stride;
389 if (superblock > 1 && EXT2_HAS_RO_COMPAT_FEATURE(fs->super,
393 for (group = 0; group < fs->group_desc_count; group++) {
394 ext2fs_bg_flags_clear(fs, group, EXT2_BG_BLOCK_UNINIT);
395 ext2fs_bg_flags_clear(fs, group, EXT2_BG_INODE_UNINIT);
396 ext2fs_bg_itable_unused_set(fs, group, 0);
399 ext2fs_group_desc_csum_set(fs, group);
401 if (fs->flags & EXT2_FLAG_RW)
402 ext2fs_mark_super_dirty(fs);
405 if ((fs->super->s_feature_incompat & EXT4_FEATURE_INCOMPAT_MMP) &&
408 retval = ext2fs_mmp_start(fs);
410 fs->flags |= EXT2_FLAG_SKIP_MMP; /* just do cleanup */
411 ext2fs_mmp_stop(fs);
416 fs->flags &= ~EXT2_FLAG_NOFREE_ON_ERROR;
417 *ret_fs = fs;
422 *ret_fs = fs;
424 ext2fs_free(fs);
433 errcode_t ext2fs_get_data_io(ext2_filsys fs, io_channel *old_io)
435 if ((fs->flags & EXT2_FLAG_IMAGE_FILE) == 0)
438 *old_io = (fs->image_io == fs->io) ? 0 : fs->io;
443 errcode_t ext2fs_set_data_io(ext2_filsys fs, io_channel new_io)
445 if ((fs->flags & EXT2_FLAG_IMAGE_FILE) == 0)
447 fs->io = new_io ? new_io : fs->image_io;
451 errcode_t ext2fs_rewrite_to_io(ext2_filsys fs, io_channel new_io)
455 if ((fs->flags & EXT2_FLAG_IMAGE_FILE) == 0)
457 err = io_channel_set_blksize(new_io, fs->blocksize);
460 if ((new_io == fs->image_io) || (new_io == fs->io))
462 if ((fs->image_io != fs->io) &&
463 fs->image_io)
464 io_channel_close(fs->image_io);
465 if (fs->io)
466 io_channel_close(fs->io);
467 fs->io = fs->image_io = new_io;
468 fs->flags |= EXT2_FLAG_DIRTY | EXT2_FLAG_RW |
470 fs->flags &= ~EXT2_FLAG_IMAGE_FILE;
