Add errseq in journal, so that JBD2 can detect whether metadata is
successfully written to fs bdev. This patch adds detection in recovery
process to replace original solution(using local variable wb_err).
Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com>
Suggested-by: Jan Kara <jack@suse.cz>
Reviewed-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20231213013224.2100050-2-chengzhihao1@huawei.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
journal->j_fs_dev = fs_dev;
journal->j_blk_offset = start;
journal->j_total_len = len;
+ jbd2_init_fs_dev_write_error(journal);
err = journal_load_superblock(journal);
if (err)
journal_superblock_t * sb;
struct recovery_info info;
- errseq_t wb_err;
- struct address_space *mapping;
memset(&info, 0, sizeof(info));
sb = journal->j_superblock;
return 0;
}
- wb_err = 0;
- mapping = journal->j_fs_dev->bd_inode->i_mapping;
- errseq_check_and_advance(&mapping->wb_err, &wb_err);
err = do_one_pass(journal, &info, PASS_SCAN);
if (!err)
err = do_one_pass(journal, &info, PASS_REVOKE);
err2 = sync_blockdev(journal->j_fs_dev);
if (!err)
err = err2;
- err2 = errseq_check_and_advance(&mapping->wb_err, &wb_err);
+ err2 = jbd2_check_fs_dev_write_error(journal);
if (!err)
err = err2;
/* Make sure all replayed data is on permanent storage */
*/
struct block_device *j_fs_dev;
+ /**
+ * @j_fs_dev_wb_err:
+ *
+ * Records the errseq of the client fs's backing block device.
+ */
+ errseq_t j_fs_dev_wb_err;
+
/**
* @j_total_len: Total maximum capacity of the journal region on disk.
*/
handle->h_aborted = 1;
}
+static inline void jbd2_init_fs_dev_write_error(journal_t *journal)
+{
+ struct address_space *mapping = journal->j_fs_dev->bd_inode->i_mapping;
+
+ /*
+ * Save the original wb_err value of client fs's bdev mapping which
+ * could be used to detect the client fs's metadata async write error.
+ */
+ errseq_check_and_advance(&mapping->wb_err, &journal->j_fs_dev_wb_err);
+}
+
+static inline int jbd2_check_fs_dev_write_error(journal_t *journal)
+{
+ struct address_space *mapping = journal->j_fs_dev->bd_inode->i_mapping;
+
+ return errseq_check(&mapping->wb_err,
+ READ_ONCE(journal->j_fs_dev_wb_err));
+}
+
#endif /* __KERNEL__ */
/* Comparison functions for transaction IDs: perform comparisons using