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-rw-r--r--fs/nilfs2/segbuf.c70
1 files changed, 40 insertions, 30 deletions
diff --git a/fs/nilfs2/segbuf.c b/fs/nilfs2/segbuf.c
index 17851f77f739..2e6a2723b8fa 100644
--- a/fs/nilfs2/segbuf.c
+++ b/fs/nilfs2/segbuf.c
@@ -40,35 +40,10 @@ struct nilfs_write_info {
sector_t blocknr;
};
-
static int nilfs_segbuf_write(struct nilfs_segment_buffer *segbuf,
struct the_nilfs *nilfs);
static int nilfs_segbuf_wait(struct nilfs_segment_buffer *segbuf);
-
-static struct kmem_cache *nilfs_segbuf_cachep;
-
-static void nilfs_segbuf_init_once(void *obj)
-{
- memset(obj, 0, sizeof(struct nilfs_segment_buffer));
-}
-
-int __init nilfs_init_segbuf_cache(void)
-{
- nilfs_segbuf_cachep =
- kmem_cache_create("nilfs2_segbuf_cache",
- sizeof(struct nilfs_segment_buffer),
- 0, SLAB_RECLAIM_ACCOUNT,
- nilfs_segbuf_init_once);
-
- return (nilfs_segbuf_cachep == NULL) ? -ENOMEM : 0;
-}
-
-void nilfs_destroy_segbuf_cache(void)
-{
- kmem_cache_destroy(nilfs_segbuf_cachep);
-}
-
struct nilfs_segment_buffer *nilfs_segbuf_new(struct super_block *sb)
{
struct nilfs_segment_buffer *segbuf;
@@ -81,6 +56,7 @@ struct nilfs_segment_buffer *nilfs_segbuf_new(struct super_block *sb)
INIT_LIST_HEAD(&segbuf->sb_list);
INIT_LIST_HEAD(&segbuf->sb_segsum_buffers);
INIT_LIST_HEAD(&segbuf->sb_payload_buffers);
+ segbuf->sb_super_root = NULL;
init_completion(&segbuf->sb_bio_event);
atomic_set(&segbuf->sb_err, 0);
@@ -158,7 +134,7 @@ int nilfs_segbuf_extend_payload(struct nilfs_segment_buffer *segbuf,
}
int nilfs_segbuf_reset(struct nilfs_segment_buffer *segbuf, unsigned flags,
- time_t ctime)
+ time_t ctime, __u64 cno)
{
int err;
@@ -171,6 +147,7 @@ int nilfs_segbuf_reset(struct nilfs_segment_buffer *segbuf, unsigned flags,
segbuf->sb_sum.sumbytes = sizeof(struct nilfs_segment_summary);
segbuf->sb_sum.nfinfo = segbuf->sb_sum.nfileblk = 0;
segbuf->sb_sum.ctime = ctime;
+ segbuf->sb_sum.cno = cno;
return 0;
}
@@ -196,13 +173,14 @@ void nilfs_segbuf_fill_in_segsum(struct nilfs_segment_buffer *segbuf)
raw_sum->ss_nfinfo = cpu_to_le32(segbuf->sb_sum.nfinfo);
raw_sum->ss_sumbytes = cpu_to_le32(segbuf->sb_sum.sumbytes);
raw_sum->ss_pad = 0;
+ raw_sum->ss_cno = cpu_to_le64(segbuf->sb_sum.cno);
}
/*
* 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;
@@ -229,8 +207,8 @@ 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;
@@ -256,6 +234,20 @@ 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;
@@ -282,6 +274,7 @@ static void nilfs_segbuf_clear(struct nilfs_segment_buffer *segbuf)
{
nilfs_release_buffers(&segbuf->sb_segsum_buffers);
nilfs_release_buffers(&segbuf->sb_payload_buffers);
+ segbuf->sb_super_root = NULL;
}
/*
@@ -334,6 +327,23 @@ 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
*/