125 static int jbd2_verify_csum_type(journal_t *j, journal_superblock_t *sb)  in jbd2_verify_csum_type()  argument
130 	return sb->s_checksum_type == JBD2_CRC32C_CHKSUM;  in jbd2_verify_csum_type()
133 static __be32 jbd2_superblock_csum(journal_t *j, journal_superblock_t *sb)  in jbd2_superblock_csum()  argument
138 	old_csum = sb->s_checksum;  in jbd2_superblock_csum()
139 	sb->s_checksum = 0;  in jbd2_superblock_csum()
140 	csum = jbd2_chksum(j, ~0, (char *)sb, sizeof(journal_superblock_t));  in jbd2_superblock_csum()
141 	sb->s_checksum = old_csum;  in jbd2_superblock_csum()
146 static int jbd2_superblock_csum_verify(journal_t *j, journal_superblock_t *sb)  in jbd2_superblock_csum_verify()  argument
151 	return sb->s_checksum == jbd2_superblock_csum(j, sb);  in jbd2_superblock_csum_verify()
154 static void jbd2_superblock_csum_set(journal_t *j, journal_superblock_t *sb)  in jbd2_superblock_csum_set()  argument
159 	sb->s_checksum = jbd2_superblock_csum(j, sb);  in jbd2_superblock_csum_set()
1286 	journal_superblock_t *sb = journal->j_superblock;  in journal_reset()  local
1289 	first = be32_to_cpu(sb->s_first);  in journal_reset()
1290 	last = be32_to_cpu(sb->s_maxlen);  in journal_reset()
1317 	if (sb->s_start == 0) {  in journal_reset()
1344 	journal_superblock_t *sb = journal->j_superblock;  in jbd2_write_superblock()  local
1366 	jbd2_superblock_csum_set(journal, sb);  in jbd2_write_superblock()
1399 	journal_superblock_t *sb = journal->j_superblock;  in jbd2_journal_update_sb_log_tail()  local
1406 	sb->s_sequence = cpu_to_be32(tail_tid);  in jbd2_journal_update_sb_log_tail()
1407 	sb->s_start    = cpu_to_be32(tail_block);  in jbd2_journal_update_sb_log_tail()
1415 	WARN_ON(!sb->s_sequence);  in jbd2_journal_update_sb_log_tail()
1433 	journal_superblock_t *sb = journal->j_superblock;  in jbd2_mark_journal_empty()  local
1438 	if (sb->s_start == 0) {  in jbd2_mark_journal_empty()
1445 	sb->s_sequence = cpu_to_be32(journal->j_tail_sequence);  in jbd2_mark_journal_empty()
1446 	sb->s_start    = cpu_to_be32(0);  in jbd2_mark_journal_empty()
1467 	journal_superblock_t *sb = journal->j_superblock;  in jbd2_journal_update_sb_errno()  local
1472 	sb->s_errno    = cpu_to_be32(journal->j_errno);  in jbd2_journal_update_sb_errno()
1486 	journal_superblock_t *sb;  in journal_get_superblock()  local
1505 	sb = journal->j_superblock;  in journal_get_superblock()
1509 	if (sb->s_header.h_magic != cpu_to_be32(JBD2_MAGIC_NUMBER) ||  in journal_get_superblock()
1510 	    sb->s_blocksize != cpu_to_be32(journal->j_blocksize)) {  in journal_get_superblock()
1515 	switch(be32_to_cpu(sb->s_header.h_blocktype)) {  in journal_get_superblock()
1527 	if (be32_to_cpu(sb->s_maxlen) < journal->j_maxlen)  in journal_get_superblock()
1528 		journal->j_maxlen = be32_to_cpu(sb->s_maxlen);  in journal_get_superblock()
1529 	else if (be32_to_cpu(sb->s_maxlen) > journal->j_maxlen) {  in journal_get_superblock()
1534 	if (be32_to_cpu(sb->s_first) == 0 ||  in journal_get_superblock()
1535 	    be32_to_cpu(sb->s_first) >= journal->j_maxlen) {  in journal_get_superblock()
1538 			be32_to_cpu(sb->s_first));  in journal_get_superblock()
1558 	if (!jbd2_verify_csum_type(journal, sb)) {  in journal_get_superblock()
1575 	if (!jbd2_superblock_csum_verify(journal, sb)) {  in journal_get_superblock()
1582 		journal->j_csum_seed = jbd2_chksum(journal, ~0, sb->s_uuid,  in journal_get_superblock()
1583 						   sizeof(sb->s_uuid));  in journal_get_superblock()
1602 	journal_superblock_t *sb;  in load_superblock()  local
1608 	sb = journal->j_superblock;  in load_superblock()
1610 	journal->j_tail_sequence = be32_to_cpu(sb->s_sequence);  in load_superblock()
1611 	journal->j_tail = be32_to_cpu(sb->s_start);  in load_superblock()
1612 	journal->j_first = be32_to_cpu(sb->s_first);  in load_superblock()
1613 	journal->j_last = be32_to_cpu(sb->s_maxlen);  in load_superblock()
1614 	journal->j_errno = be32_to_cpu(sb->s_errno);  in load_superblock()
1631 	journal_superblock_t *sb;  in jbd2_journal_load()  local
1637 	sb = journal->j_superblock;  in jbd2_journal_load()
1642 		if ((sb->s_feature_ro_compat &  in jbd2_journal_load()
1644 		    (sb->s_feature_incompat &  in jbd2_journal_load()
1655 	err = jbd2_journal_create_slab(be32_to_cpu(sb->s_blocksize));  in jbd2_journal_load()
1775 	journal_superblock_t *sb;  in jbd2_journal_check_used_features()  local
1786 	sb = journal->j_superblock;  in jbd2_journal_check_used_features()
1788 	if (((be32_to_cpu(sb->s_feature_compat) & compat) == compat) &&  in jbd2_journal_check_used_features()
1789 	    ((be32_to_cpu(sb->s_feature_ro_compat) & ro) == ro) &&  in jbd2_journal_check_used_features()
1790 	    ((be32_to_cpu(sb->s_feature_incompat) & incompat) == incompat))  in jbd2_journal_check_used_features()
1844 		((incompat & (f)) && !(sb->s_feature_incompat & cpu_to_be32(f)))  in jbd2_journal_set_features()
1846 		((compat & (f)) && !(sb->s_feature_compat & cpu_to_be32(f)))  in jbd2_journal_set_features()
1847 	journal_superblock_t *sb;  in jbd2_journal_set_features()  local
1869 	sb = journal->j_superblock;  in jbd2_journal_set_features()
1873 		sb->s_checksum_type = JBD2_CRC32C_CHKSUM;  in jbd2_journal_set_features()
1874 		sb->s_feature_compat &=  in jbd2_journal_set_features()
1890 							   sb->s_uuid,  in jbd2_journal_set_features()
1891 							   sizeof(sb->s_uuid));  in jbd2_journal_set_features()
1897 		sb->s_feature_incompat &=  in jbd2_journal_set_features()
1901 	sb->s_feature_compat    |= cpu_to_be32(compat);  in jbd2_journal_set_features()
1902 	sb->s_feature_ro_compat |= cpu_to_be32(ro);  in jbd2_journal_set_features()
1903 	sb->s_feature_incompat  |= cpu_to_be32(incompat);  in jbd2_journal_set_features()
1924 	journal_superblock_t *sb;  in jbd2_journal_clear_features()  local
1929 	sb = journal->j_superblock;  in jbd2_journal_clear_features()
1931 	sb->s_feature_compat    &= ~cpu_to_be32(compat);  in jbd2_journal_clear_features()
1932 	sb->s_feature_ro_compat &= ~cpu_to_be32(ro);  in jbd2_journal_clear_features()
1933 	sb->s_feature_incompat  &= ~cpu_to_be32(incompat);  in jbd2_journal_clear_features()