From: Harshad Shirwadkar <harshadshirwadkar@xxxxxxxxx>
This function adds the skeleton for the replay path. Following patches
in the series implement the handling for individual tags.
Signed-off-by: Harshad Shirwadkar <harshadshirwadkar@xxxxxxxxx>
---
e2fsck/journal.c | 72 ++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 72 insertions(+)
diff --git a/e2fsck/journal.c b/e2fsck/journal.c
index ba38124e..9d0637e3 100644
--- a/e2fsck/journal.c
+++ b/e2fsck/journal.c
@@ -390,11 +390,83 @@ static int ext4_fc_replay(journal_t *journal, struct buffer_head *bh,
{
e2fsck_t ctx = journal->j_fs_dev->k_ctx;
struct e2fsck_fc_replay_state *state = &ctx->fc_replay_state;
+ int ret = JBD2_FC_REPLAY_CONTINUE;
+ struct ext4_fc_tl *tl;
+ __u8 *start, *end;
if (pass == PASS_SCAN) {
state->fc_current_pass = PASS_SCAN;
return ext4_fc_replay_scan(journal, bh, off, expected_tid);
}
+
+ if (state->fc_replay_num_tags == 0)
+ goto replay_done;
+
+ if (state->fc_current_pass != pass) {
+ /* Starting replay phase */
+ state->fc_current_pass = pass;
+ /* We will reset checksums */
+ ctx->fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
+ ret = ext2fs_read_bitmaps(ctx->fs);
+ if (ret) {
+ jbd_debug(1, "Error %d while reading bitmaps\n", ret);
+ return ret;
+ }
+ state->fc_super_state = ctx->fs->super->s_state;
+ /*
+ * Mark the file system to indicate it contains errors. That's
+ * because the updates performed by fast commit replay code are
+ * not atomic and may result in incosistent file system if it
+ * crashes before the replay is complete.
+ */
+ ctx->fs->super->s_state |= EXT2_ERROR_FS;
+ ctx->fs->super->s_state |= EXT4_FC_REPLAY;
+ ext2fs_mark_super_dirty(ctx->fs);
+ ext2fs_flush(ctx->fs);
+ }
+
+ start = (__u8 *)bh->b_data;
+ end = (__u8 *)bh->b_data + journal->j_blocksize - 1;
+
+ fc_for_each_tl(start, end, tl) {
+ if (state->fc_replay_num_tags == 0)
+ goto replay_done;
+ jbd_debug(3, "Replay phase processing %s tag\n",
+ tag2str(le16_to_cpu(tl->fc_tag)));
+ state->fc_replay_num_tags--;
+ switch (le16_to_cpu(tl->fc_tag)) {
+ case EXT4_FC_TAG_CREAT:
+ case EXT4_FC_TAG_LINK:
+ case EXT4_FC_TAG_UNLINK:
+ case EXT4_FC_TAG_ADD_RANGE:
+ case EXT4_FC_TAG_DEL_RANGE:
+ case EXT4_FC_TAG_INODE:
+ case EXT4_FC_TAG_TAIL:
+ case EXT4_FC_TAG_PAD:
+ case EXT4_FC_TAG_HEAD:
+ break;
+ default:
+ ret = -ECANCELED;
+ break;
+ }
+ if (ret < 0)
+ break;
+ ret = JBD2_FC_REPLAY_CONTINUE;
+ }
+ return ret;
+replay_done:
+ jbd_debug(1, "End of fast commit replay\n");
+ if (state->fc_current_pass != pass)
+ return JBD2_FC_REPLAY_STOP;
+
+ ext2fs_calculate_summary_stats(ctx->fs, 0 /* update bg also */);
+ ext2fs_write_block_bitmap(ctx->fs);
+ ext2fs_write_inode_bitmap(ctx->fs);
+ ext2fs_mark_super_dirty(ctx->fs);
+ ext2fs_set_gdt_csum(ctx->fs);
+ ctx->fs->super->s_state = state->fc_super_state;
+ ext2fs_flush(ctx->fs);
+
return JBD2_FC_REPLAY_STOP;
}
--
2.30.0.284.gd98b1dd5eaa7-goog
