diff options
Diffstat (limited to 'fs/nilfs2')
| -rw-r--r-- | fs/nilfs2/segment.c | 85 |
1 files changed, 52 insertions, 33 deletions
diff --git a/fs/nilfs2/segment.c b/fs/nilfs2/segment.c index 6ea81f1d5094..a92609816bc9 100644 --- a/fs/nilfs2/segment.c +++ b/fs/nilfs2/segment.c @@ -1639,41 +1639,30 @@ static void nilfs_begin_folio_io(struct folio *folio) folio_unlock(folio); } -static void nilfs_segctor_prepare_write(struct nilfs_sc_info *sci) +/** + * nilfs_prepare_write_logs - prepare to write logs + * @logs: logs to prepare for writing + * @seed: checksum seed value + * + * nilfs_prepare_write_logs() adds checksums and prepares the block + * buffers/folios for writing logs. In order to stabilize folios of + * memory-mapped file blocks by putting them in writeback state before + * calculating the checksums, first prepare to write payload blocks other + * than segment summary and super root blocks in which the checksums will + * be embedded. + */ +static void nilfs_prepare_write_logs(struct list_head *logs, u32 seed) { struct nilfs_segment_buffer *segbuf; struct folio *bd_folio = NULL, *fs_folio = NULL; + struct buffer_head *bh; - list_for_each_entry(segbuf, &sci->sc_segbufs, sb_list) { - struct buffer_head *bh; - - list_for_each_entry(bh, &segbuf->sb_segsum_buffers, - b_assoc_buffers) { - if (bh->b_folio != bd_folio) { - if (bd_folio) { - folio_lock(bd_folio); - folio_wait_writeback(bd_folio); - folio_clear_dirty_for_io(bd_folio); - folio_start_writeback(bd_folio); - folio_unlock(bd_folio); - } - bd_folio = bh->b_folio; - } - } - + /* Prepare to write payload blocks */ + list_for_each_entry(segbuf, logs, sb_list) { list_for_each_entry(bh, &segbuf->sb_payload_buffers, b_assoc_buffers) { - if (bh == segbuf->sb_super_root) { - if (bh->b_folio != bd_folio) { - folio_lock(bd_folio); - folio_wait_writeback(bd_folio); - folio_clear_dirty_for_io(bd_folio); - folio_start_writeback(bd_folio); - folio_unlock(bd_folio); - bd_folio = bh->b_folio; - } + if (bh == segbuf->sb_super_root) break; - } set_buffer_async_write(bh); if (bh->b_folio != fs_folio) { nilfs_begin_folio_io(fs_folio); @@ -1681,6 +1670,40 @@ static void nilfs_segctor_prepare_write(struct nilfs_sc_info *sci) } } } + nilfs_begin_folio_io(fs_folio); + + nilfs_add_checksums_on_logs(logs, seed); + + /* Prepare to write segment summary blocks */ + list_for_each_entry(segbuf, logs, sb_list) { + list_for_each_entry(bh, &segbuf->sb_segsum_buffers, + b_assoc_buffers) { + if (bh->b_folio == bd_folio) + continue; + if (bd_folio) { + folio_lock(bd_folio); + folio_wait_writeback(bd_folio); + folio_clear_dirty_for_io(bd_folio); + folio_start_writeback(bd_folio); + folio_unlock(bd_folio); + } + bd_folio = bh->b_folio; + } + } + + /* Prepare to write super root block */ + bh = NILFS_LAST_SEGBUF(logs)->sb_super_root; + if (bh) { + if (bh->b_folio != bd_folio) { + folio_lock(bd_folio); + folio_wait_writeback(bd_folio); + folio_clear_dirty_for_io(bd_folio); + folio_start_writeback(bd_folio); + folio_unlock(bd_folio); + bd_folio = bh->b_folio; + } + } + if (bd_folio) { folio_lock(bd_folio); folio_wait_writeback(bd_folio); @@ -1688,7 +1711,6 @@ static void nilfs_segctor_prepare_write(struct nilfs_sc_info *sci) folio_start_writeback(bd_folio); folio_unlock(bd_folio); } - nilfs_begin_folio_io(fs_folio); } static int nilfs_segctor_write(struct nilfs_sc_info *sci, @@ -2070,10 +2092,7 @@ static int nilfs_segctor_do_construct(struct nilfs_sc_info *sci, int mode) nilfs_segctor_update_segusage(sci, nilfs->ns_sufile); /* Write partial segments */ - nilfs_segctor_prepare_write(sci); - - nilfs_add_checksums_on_logs(&sci->sc_segbufs, - nilfs->ns_crc_seed); + nilfs_prepare_write_logs(&sci->sc_segbufs, nilfs->ns_crc_seed); err = nilfs_segctor_write(sci, nilfs); if (unlikely(err)) |