50 					   journal_superblock_t *jsb)  in ext2fs_journal_verify_csum_type()  argument
55 	return jsb->s_checksum_type == JBD2_CRC32C_CHKSUM;  in ext2fs_journal_verify_csum_type()
58 static __u32 ext2fs_journal_sb_csum(journal_superblock_t *jsb)  in ext2fs_journal_sb_csum()  argument
62 	old_crc = jsb->s_checksum;  in ext2fs_journal_sb_csum()
63 	jsb->s_checksum = 0;  in ext2fs_journal_sb_csum()
64 	crc = ext2fs_crc32c_le(~0, (unsigned char *)jsb,  in ext2fs_journal_sb_csum()
66 	jsb->s_checksum = old_crc;  in ext2fs_journal_sb_csum()
72 					 journal_superblock_t *jsb)  in ext2fs_journal_sb_csum_verify()  argument
79 	provided = ext2fs_be32_to_cpu(jsb->s_checksum);  in ext2fs_journal_sb_csum_verify()
80 	calculated = ext2fs_journal_sb_csum(jsb);  in ext2fs_journal_sb_csum_verify()
86 					    journal_superblock_t *jsb)  in ext2fs_journal_sb_csum_set()  argument
93 	crc = ext2fs_journal_sb_csum(jsb);  in ext2fs_journal_sb_csum_set()
94 	jsb->s_checksum = ext2fs_cpu_to_be32(crc);  in ext2fs_journal_sb_csum_set()
548 	journal_superblock_t *jsb;  in ext2fs_journal_load()  local
555 	jsb = journal->j_superblock;  in ext2fs_journal_load()
557 	if (jsb->s_header.h_magic != htonl(JFS_MAGIC_NUMBER))  in ext2fs_journal_load()
560 	switch (ntohl(jsb->s_header.h_blocktype)) {  in ext2fs_journal_load()
563 		if (jsb->s_feature_compat ||  in ext2fs_journal_load()
564 		    jsb->s_feature_incompat ||  in ext2fs_journal_load()
565 		    jsb->s_feature_ro_compat ||  in ext2fs_journal_load()
566 		    jsb->s_nr_users)  in ext2fs_journal_load()
572 		if (ntohl(jsb->s_nr_users) > 1 &&  in ext2fs_journal_load()
575 		if (ntohl(jsb->s_nr_users) > 1)  in ext2fs_journal_load()
609 	if (!ext2fs_journal_verify_csum_type(journal, jsb) ||  in ext2fs_journal_load()
610 	    !ext2fs_journal_sb_csum_verify(journal, jsb))  in ext2fs_journal_load()
614 		journal->j_csum_seed = jbd2_chksum(journal, ~0, jsb->s_uuid,  in ext2fs_journal_load()
615 						   sizeof(jsb->s_uuid));  in ext2fs_journal_load()
620 	if (jsb->s_blocksize != htonl(journal->j_blocksize))  in ext2fs_journal_load()
623 	if (ntohl(jsb->s_maxlen) < journal->j_maxlen)  in ext2fs_journal_load()
624 		journal->j_maxlen = ntohl(jsb->s_maxlen);  in ext2fs_journal_load()
625 	else if (ntohl(jsb->s_maxlen) > journal->j_maxlen)  in ext2fs_journal_load()
628 	journal->j_tail_sequence = ntohl(jsb->s_sequence);  in ext2fs_journal_load()
630 	journal->j_tail = ntohl(jsb->s_start);  in ext2fs_journal_load()
631 	journal->j_first = ntohl(jsb->s_first);  in ext2fs_journal_load()
632 	journal->j_last = ntohl(jsb->s_maxlen);  in ext2fs_journal_load()
640 	journal_superblock_t *jsb;  in ext2fs_journal_release()  local
645 		jsb = journal->j_superblock;  in ext2fs_journal_release()
646 		jsb->s_sequence = htonl(journal->j_tail_sequence);  in ext2fs_journal_release()
648 			jsb->s_start = 0; /* this marks the journal as empty */  in ext2fs_journal_release()
649 		ext2fs_journal_sb_csum_set(journal, jsb);  in ext2fs_journal_release()