42 static int find_offset(uint64_t file_size, int roots, uint64_t *offset,  in find_offset()  argument
45     check(offset);  in find_offset()
69             *offset = mi;  in find_offset()
89 static int find_verity_offset(fec_handle *f, uint64_t *offset)  in find_verity_offset()  argument
92     check(offset);  in find_verity_offset()
94     return find_offset(f->data_size, 0, offset, get_verity_size,  in find_verity_offset()
99 static int parse_ecc_header(fec_handle *f, uint64_t offset)  in parse_ecc_header()  argument
105     debug("offset = %" PRIu64, offset);  in parse_ecc_header()
107     if (offset > f->size - sizeof(fec_header)) {  in parse_ecc_header()
115     if (!raw_pread(f->fd, &header, sizeof(fec_header), offset)) {  in parse_ecc_header()
121     offset -= offset % FEC_BLOCKSIZE;  in parse_ecc_header()
198 static int parse_ecc(fec_handle *f, uint64_t offset)  in parse_ecc()  argument
201     check(offset % FEC_BLOCKSIZE == 0);  in parse_ecc()
202     check(offset < UINT64_MAX - FEC_BLOCKSIZE);  in parse_ecc()
205     if (parse_ecc_header(f, offset) == 0) {  in parse_ecc()
210     if (parse_ecc_header(f, offset + FEC_BLOCKSIZE - sizeof(fec_header)) == 0) {  in parse_ecc()
220 static int get_squashfs_size(fec_handle *f, uint64_t *offset)  in get_squashfs_size()  argument
223     check(offset);  in get_squashfs_size()
242     *offset = sq.bytes_used_4K_padded;  in get_squashfs_size()
248 static int get_ext4_size(fec_handle *f, uint64_t *offset)  in get_ext4_size()  argument
252     check(offset);  in get_ext4_size()
269     *offset = info.len;  in get_ext4_size()
275 static int get_fs_size(fec_handle *f, uint64_t *offset)  in get_fs_size()  argument
278     check(offset);  in get_fs_size()
281         return get_ext4_size(f, offset);  in get_fs_size()
283         return get_squashfs_size(f, offset);  in get_fs_size()
286         int rc = get_ext4_size(f, offset);  in get_fs_size()
293         rc = get_squashfs_size(f, offset);  in get_fs_size()
309     uint64_t offset = f->data_size - VERITY_METADATA_SIZE;  in load_verity()  local
312     if (verity_parse_header(f, offset) == 0) {  in load_verity()
313         debug("found at %" PRIu64 " (start %" PRIu64 ")", offset,  in load_verity()
321     if (find_verity_offset(f, &offset) == 0 &&  in load_verity()
322             verity_parse_header(f, offset) == 0) {  in load_verity()
323         debug("found at %" PRIu64 " (start %" PRIu64 ")", offset,  in load_verity()
329     int rc = get_fs_size(f, &offset);  in load_verity()
331         debug("file system size = %" PRIu64, offset);  in load_verity()
333         offset += verity_get_size(offset, NULL, NULL, SHA256_DIGEST_LENGTH);  in load_verity()
334         rc = verity_parse_header(f, offset);  in load_verity()
337             debug("found at %" PRIu64 " (start %" PRIu64 ")", offset,  in load_verity()
351     uint64_t offset = f->data_size - FEC_BLOCKSIZE;  in load_ecc()  local
353     if (parse_ecc(f, offset) == 0) {  in load_ecc()
354         debug("found at %" PRIu64 " (start %" PRIu64 ")", offset,  in load_ecc()