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authorRyusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>2010-03-23 01:50:38 +0900
committerRyusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>2010-05-10 11:32:30 +0900
commitaaed1d5bfac459ead9aaad324e7fe3326250f50a (patch)
tree389f305354db9a45a482ff38e5f0ffab030c76bd /fs/nilfs2/segbuf.c
parent1e2b68bf285dce604388fcb6f85b7e612156db17 (diff)
downloadlinux-aaed1d5bfac459ead9aaad324e7fe3326250f50a.tar.bz2
nilfs2: move out checksum routines to segment buffer code
This moves out checksum routines in log writer to segbuf.c for cleanup. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
Diffstat (limited to 'fs/nilfs2/segbuf.c')
-rw-r--r--fs/nilfs2/segbuf.c39
1 files changed, 35 insertions, 4 deletions
diff --git a/fs/nilfs2/segbuf.c b/fs/nilfs2/segbuf.c
index a24ca9cc6afb..6bf3b1f3406e 100644
--- a/fs/nilfs2/segbuf.c
+++ b/fs/nilfs2/segbuf.c
@@ -202,8 +202,8 @@ void nilfs_segbuf_fill_in_segsum(struct nilfs_segment_buffer *segbuf)
/*
* CRC calculation routines
*/
-void nilfs_segbuf_fill_in_segsum_crc(struct nilfs_segment_buffer *segbuf,
- u32 seed)
+static void
+nilfs_segbuf_fill_in_segsum_crc(struct nilfs_segment_buffer *segbuf, u32 seed)
{
struct buffer_head *bh;
struct nilfs_segment_summary *raw_sum;
@@ -230,8 +230,8 @@ void nilfs_segbuf_fill_in_segsum_crc(struct nilfs_segment_buffer *segbuf,
raw_sum->ss_sumsum = cpu_to_le32(crc);
}
-void nilfs_segbuf_fill_in_data_crc(struct nilfs_segment_buffer *segbuf,
- u32 seed)
+static void nilfs_segbuf_fill_in_data_crc(struct nilfs_segment_buffer *segbuf,
+ u32 seed)
{
struct buffer_head *bh;
struct nilfs_segment_summary *raw_sum;
@@ -257,6 +257,20 @@ void nilfs_segbuf_fill_in_data_crc(struct nilfs_segment_buffer *segbuf,
raw_sum->ss_datasum = cpu_to_le32(crc);
}
+static void
+nilfs_segbuf_fill_in_super_root_crc(struct nilfs_segment_buffer *segbuf,
+ u32 seed)
+{
+ struct nilfs_super_root *raw_sr;
+ u32 crc;
+
+ raw_sr = (struct nilfs_super_root *)segbuf->sb_super_root->b_data;
+ crc = crc32_le(seed,
+ (unsigned char *)raw_sr + sizeof(raw_sr->sr_sum),
+ NILFS_SR_BYTES - sizeof(raw_sr->sr_sum));
+ raw_sr->sr_sum = cpu_to_le32(crc);
+}
+
static void nilfs_release_buffers(struct list_head *list)
{
struct buffer_head *bh, *n;
@@ -336,6 +350,23 @@ int nilfs_wait_on_logs(struct list_head *logs)
return ret;
}
+/**
+ * nilfs_add_checksums_on_logs - add checksums on the logs
+ * @logs: list of segment buffers storing target logs
+ * @seed: checksum seed value
+ */
+void nilfs_add_checksums_on_logs(struct list_head *logs, u32 seed)
+{
+ struct nilfs_segment_buffer *segbuf;
+
+ list_for_each_entry(segbuf, logs, sb_list) {
+ if (segbuf->sb_super_root)
+ nilfs_segbuf_fill_in_super_root_crc(segbuf, seed);
+ nilfs_segbuf_fill_in_segsum_crc(segbuf, seed);
+ nilfs_segbuf_fill_in_data_crc(segbuf, seed);
+ }
+}
+
/*
* BIO operations
*/