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| author |   Zhihao Cheng <chengzhihao1@huawei.com> | 2023-12-13 09:32:20 +0800 |
|---|---|---|
| committer |   Theodore Ts'o <tytso@mit.edu> | 2024-01-04 23:42:21 -0500 |
| commit | 990b6b5b13b7993b7f44740c0add3119d407ccbf (patch) | |
| tree | a6dfa9124d7f24d6fc8b380b0bd0552232c73c51 /include/linux/jbd2.h | |
| parent | ext4: improving calculation of 'fe_{len|start}' in mb_find_extent() (diff) | |
| download | wireguard-linux-990b6b5b13b7993b7f44740c0add3119d407ccbf.tar.xz wireguard-linux-990b6b5b13b7993b7f44740c0add3119d407ccbf.zip | |
jbd2: add errseq to detect client fs's bdev writeback error
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>
Diffstat (limited to 'include/linux/jbd2.h')
| -rw-r--r-- | include/linux/jbd2.h | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/include/linux/jbd2.h b/include/linux/jbd2.h index beb30719ee16..cea1aa70ae36 100644 --- a/include/linux/jbd2.h +++ b/include/linux/jbd2.h @@ -999,6 +999,13 @@ struct journal_s 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. */ unsigned int j_total_len; @@ -1698,6 +1705,25 @@ static inline void jbd2_journal_abort_handle(handle_t *handle) 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 |