fs/erofs/super.c

57 	struct erofs_super_block *dsb;
63 	dsb = kmemdup(sbdata + EROFS_SUPER_OFFSET, len, GFP_KERNEL);
64 	if (!dsb)
67 	expected_crc = le32_to_cpu(dsb->checksum);
68 	dsb->checksum = 0;
70 	crc = crc32c(~0, dsb, len);
71 	kfree(dsb);
112 				       struct erofs_super_block *dsb)
114 	const unsigned int feature = le32_to_cpu(dsb->feature_incompat);
164 			      struct erofs_super_block *dsb)
166 	if (!dsb->u1.available_compr_algs)
221 			      struct erofs_super_block *dsb)
234 		ondisk_extradevs = le16_to_cpu(dsb->extra_devices);
249 	pos = le16_to_cpu(dsb->devt_slotoff) * EROFS_DEVT_SLOT_SIZE;
286 	struct erofs_super_block *dsb;
297 	dsb = (struct erofs_super_block *)(data + EROFS_SUPER_OFFSET);
300 	if (le32_to_cpu(dsb->magic) != EROFS_SUPER_MAGIC_V1) {
305 	sbi->blkszbits  = dsb->blkszbits;
310 	if (dsb->dirblkbits) {
311 		erofs_err(sb, "dirblkbits %u isn't supported", dsb->dirblkbits);
315 	sbi->feature_compat = le32_to_cpu(dsb->feature_compat);
323 	if (!check_layout_compatibility(sb, dsb))
326 	sbi->sb_size = 128 + dsb->sb_extslots * EROFS_SB_EXTSLOT_SIZE;
332 	sbi->primarydevice_blocks = le32_to_cpu(dsb->blocks);
333 	sbi->meta_blkaddr = le32_to_cpu(dsb->meta_blkaddr);
335 	sbi->xattr_blkaddr = le32_to_cpu(dsb->xattr_blkaddr);
336 	sbi->xattr_prefix_start = le32_to_cpu(dsb->xattr_prefix_start);
337 	sbi->xattr_prefix_count = dsb->xattr_prefix_count;
338 	sbi->xattr_filter_reserved = dsb->xattr_filter_reserved;
341 	sbi->root_nid = le16_to_cpu(dsb->root_nid);
342 	sbi->packed_nid = le64_to_cpu(dsb->packed_nid);
343 	sbi->inos = le64_to_cpu(dsb->inos);
345 	sbi->build_time = le64_to_cpu(dsb->build_time);
346 	sbi->build_time_nsec = le32_to_cpu(dsb->build_time_nsec);
348 	memcpy(&sb->s_uuid, dsb->uuid, sizeof(dsb->uuid));
350 	ret = strscpy(sbi->volume_name, dsb->volume_name,
351 		      sizeof(dsb->volume_name));
359 	ret = z_erofs_parse_cfgs(sb, dsb);
364 	ret = erofs_scan_devices(sb, dsb);