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author | Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> | 2009-11-29 16:51:16 +0900 |
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committer | Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> | 2009-11-30 21:06:35 +0900 |
commit | e29df395bc6d2d0c89b3d8a5939a24b1b43c2fb6 (patch) | |
tree | 6d6f570d8158d7a18570492d9f5f5edf843ed28c /fs/nilfs2/segbuf.c | |
parent | 9c965bac169f786cc6cca8ff81d3b636e923c960 (diff) | |
download | linux-3.10-e29df395bc6d2d0c89b3d8a5939a24b1b43c2fb6.tar.gz linux-3.10-e29df395bc6d2d0c89b3d8a5939a24b1b43c2fb6.tar.bz2 linux-3.10-e29df395bc6d2d0c89b3d8a5939a24b1b43c2fb6.zip |
nilfs2: add iterator for segment buffers
This adds a few iterator functions for segment buffers to make it easy
to handle multiple series of logs.
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
Diffstat (limited to 'fs/nilfs2/segbuf.c')
-rw-r--r-- | fs/nilfs2/segbuf.c | 45 |
1 files changed, 44 insertions, 1 deletions
diff --git a/fs/nilfs2/segbuf.c b/fs/nilfs2/segbuf.c index 636590c92c8..d856d62bf88 100644 --- a/fs/nilfs2/segbuf.c +++ b/fs/nilfs2/segbuf.c @@ -234,7 +234,7 @@ void nilfs_segbuf_fill_in_data_crc(struct nilfs_segment_buffer *segbuf, raw_sum->ss_datasum = cpu_to_le32(crc); } -void nilfs_release_buffers(struct list_head *list) +static void nilfs_release_buffers(struct list_head *list) { struct buffer_head *bh, *n; @@ -256,6 +256,49 @@ void nilfs_release_buffers(struct list_head *list) } } +static void nilfs_segbuf_clear(struct nilfs_segment_buffer *segbuf) +{ + nilfs_release_buffers(&segbuf->sb_segsum_buffers); + nilfs_release_buffers(&segbuf->sb_payload_buffers); +} + +/* + * Iterators for segment buffers + */ +void nilfs_clear_logs(struct list_head *logs) +{ + struct nilfs_segment_buffer *segbuf; + + list_for_each_entry(segbuf, logs, sb_list) + nilfs_segbuf_clear(segbuf); +} + +void nilfs_truncate_logs(struct list_head *logs, + struct nilfs_segment_buffer *last) +{ + struct nilfs_segment_buffer *n, *segbuf; + + segbuf = list_prepare_entry(last, logs, sb_list); + list_for_each_entry_safe_continue(segbuf, n, logs, sb_list) { + list_del_init(&segbuf->sb_list); + nilfs_segbuf_clear(segbuf); + nilfs_segbuf_free(segbuf); + } +} + +int nilfs_wait_on_logs(struct list_head *logs) +{ + struct nilfs_segment_buffer *segbuf; + int err; + + list_for_each_entry(segbuf, logs, sb_list) { + err = nilfs_segbuf_wait(segbuf); + if (err) + return err; + } + return 0; +} + /* * BIO operations */ |