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()
1271 	journal_superblock_t *sb = journal->j_superblock;  in journal_reset()  local
1274 	first = be32_to_cpu(sb->s_first);  in journal_reset()
1275 	last = be32_to_cpu(sb->s_maxlen);  in journal_reset()
1302 	if (sb->s_start == 0) {  in journal_reset()
1329 	journal_superblock_t *sb = journal->j_superblock;  in jbd2_write_superblock()  local
1351 	jbd2_superblock_csum_set(journal, sb);  in jbd2_write_superblock()
1384 	journal_superblock_t *sb = journal->j_superblock;  in jbd2_journal_update_sb_log_tail()  local
1391 	sb->s_sequence = cpu_to_be32(tail_tid);  in jbd2_journal_update_sb_log_tail()
1392 	sb->s_start    = cpu_to_be32(tail_block);  in jbd2_journal_update_sb_log_tail()
1400 	WARN_ON(!sb->s_sequence);  in jbd2_journal_update_sb_log_tail()
1418 	journal_superblock_t *sb = journal->j_superblock;  in jbd2_mark_journal_empty()  local
1423 	if (sb->s_start == 0) {  in jbd2_mark_journal_empty()
1430 	sb->s_sequence = cpu_to_be32(journal->j_tail_sequence);  in jbd2_mark_journal_empty()
1431 	sb->s_start    = cpu_to_be32(0);  in jbd2_mark_journal_empty()
1452 	journal_superblock_t *sb = journal->j_superblock;  in jbd2_journal_update_sb_errno()  local
1457 	sb->s_errno    = cpu_to_be32(journal->j_errno);  in jbd2_journal_update_sb_errno()
1471 	journal_superblock_t *sb;  in journal_get_superblock()  local
1490 	sb = journal->j_superblock;  in journal_get_superblock()
1494 	if (sb->s_header.h_magic != cpu_to_be32(JBD2_MAGIC_NUMBER) ||  in journal_get_superblock()
1495 	    sb->s_blocksize != cpu_to_be32(journal->j_blocksize)) {  in journal_get_superblock()
1500 	switch(be32_to_cpu(sb->s_header.h_blocktype)) {  in journal_get_superblock()
1512 	if (be32_to_cpu(sb->s_maxlen) < journal->j_maxlen)  in journal_get_superblock()
1513 		journal->j_maxlen = be32_to_cpu(sb->s_maxlen);  in journal_get_superblock()
1514 	else if (be32_to_cpu(sb->s_maxlen) > journal->j_maxlen) {  in journal_get_superblock()
1519 	if (be32_to_cpu(sb->s_first) == 0 ||  in journal_get_superblock()
1520 	    be32_to_cpu(sb->s_first) >= journal->j_maxlen) {  in journal_get_superblock()
1523 			be32_to_cpu(sb->s_first));  in journal_get_superblock()
1543 	if (!jbd2_verify_csum_type(journal, sb)) {  in journal_get_superblock()
1560 	if (!jbd2_superblock_csum_verify(journal, sb)) {  in journal_get_superblock()
1568 		journal->j_csum_seed = jbd2_chksum(journal, ~0, sb->s_uuid,  in journal_get_superblock()
1569 						   sizeof(sb->s_uuid));  in journal_get_superblock()
1588 	journal_superblock_t *sb;  in load_superblock()  local
1594 	sb = journal->j_superblock;  in load_superblock()
1596 	journal->j_tail_sequence = be32_to_cpu(sb->s_sequence);  in load_superblock()
1597 	journal->j_tail = be32_to_cpu(sb->s_start);  in load_superblock()
1598 	journal->j_first = be32_to_cpu(sb->s_first);  in load_superblock()
1599 	journal->j_last = be32_to_cpu(sb->s_maxlen);  in load_superblock()
1600 	journal->j_errno = be32_to_cpu(sb->s_errno);  in load_superblock()
1617 	journal_superblock_t *sb;  in jbd2_journal_load()  local
1623 	sb = journal->j_superblock;  in jbd2_journal_load()
1628 		if ((sb->s_feature_ro_compat &  in jbd2_journal_load()
1630 		    (sb->s_feature_incompat &  in jbd2_journal_load()
1641 	err = jbd2_journal_create_slab(be32_to_cpu(sb->s_blocksize));  in jbd2_journal_load()
1761 	journal_superblock_t *sb;  in jbd2_journal_check_used_features()  local
1772 	sb = journal->j_superblock;  in jbd2_journal_check_used_features()
1774 	if (((be32_to_cpu(sb->s_feature_compat) & compat) == compat) &&  in jbd2_journal_check_used_features()
1775 	    ((be32_to_cpu(sb->s_feature_ro_compat) & ro) == ro) &&  in jbd2_journal_check_used_features()
1776 	    ((be32_to_cpu(sb->s_feature_incompat) & incompat) == incompat))  in jbd2_journal_check_used_features()
1830 		((incompat & (f)) && !(sb->s_feature_incompat & cpu_to_be32(f)))  in jbd2_journal_set_features()
1832 		((compat & (f)) && !(sb->s_feature_compat & cpu_to_be32(f)))  in jbd2_journal_set_features()
1833 	journal_superblock_t *sb;  in jbd2_journal_set_features()  local
1855 	sb = journal->j_superblock;  in jbd2_journal_set_features()
1859 		sb->s_checksum_type = JBD2_CRC32C_CHKSUM;  in jbd2_journal_set_features()
1860 		sb->s_feature_compat &=  in jbd2_journal_set_features()
1876 							   sb->s_uuid,  in jbd2_journal_set_features()
1877 							   sizeof(sb->s_uuid));  in jbd2_journal_set_features()
1883 		sb->s_feature_incompat &=  in jbd2_journal_set_features()
1887 	sb->s_feature_compat    |= cpu_to_be32(compat);  in jbd2_journal_set_features()
1888 	sb->s_feature_ro_compat |= cpu_to_be32(ro);  in jbd2_journal_set_features()
1889 	sb->s_feature_incompat  |= cpu_to_be32(incompat);  in jbd2_journal_set_features()
1910 	journal_superblock_t *sb;  in jbd2_journal_clear_features()  local
1915 	sb = journal->j_superblock;  in jbd2_journal_clear_features()
1917 	sb->s_feature_compat    &= ~cpu_to_be32(compat);  in jbd2_journal_clear_features()
1918 	sb->s_feature_ro_compat &= ~cpu_to_be32(ro);  in jbd2_journal_clear_features()
1919 	sb->s_feature_incompat  &= ~cpu_to_be32(incompat);  in jbd2_journal_clear_features()