void ext4_fc_init(struct super_block *sb, journal_t *journal)
{
+ int num_fc_blocks;
+
/*
* We set replay callback even if fast commit disabled because we may
* could still have fast commit blocks that need to be replayed even if
if (!test_opt2(sb, JOURNAL_FAST_COMMIT))
return;
journal->j_fc_cleanup_callback = ext4_fc_cleanup;
- if (jbd2_fc_init(journal, EXT4_NUM_FC_BLKS)) {
+ if (!buffer_uptodate(journal->j_sb_buffer)
+ && ext4_read_bh_lock(journal->j_sb_buffer, REQ_META | REQ_PRIO,
+ true)) {
+ ext4_msg(sb, KERN_ERR, "I/O error on journal");
+ return;
+ }
+ num_fc_blocks = be32_to_cpu(journal->j_superblock->s_num_fc_blks);
+ if (jbd2_fc_init(journal, num_fc_blocks ? num_fc_blocks :
+ EXT4_NUM_FC_BLKS)) {
pr_warn("Error while enabling fast commits, turning off.");
ext4_clear_feature_fast_commit(sb);
}
/* 0x0050 */
__u8 s_checksum_type; /* checksum type */
__u8 s_padding2[3];
- __u32 s_padding[42];
+/* 0x0054 */
+ __be32 s_num_fc_blks; /* Number of fast commit blocks */
+/* 0x0058 */
+ __u32 s_padding[41];
__be32 s_checksum; /* crc32c(superblock) */
/* 0x0100 */