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authorChristoph Hellwig <hch@lst.de>2016-11-25 09:07:46 +0100
committerDavid Sterba <dsterba@suse.com>2016-11-30 13:45:19 +0100
commit974b1adc3b103fae1dbc1fe6a8aceeca2878f20e (patch)
tree0b0aa4829383f26f184e6dc631ab36ae40a93554 /fs/btrfs/lzo.c
parent0c476a5d7f63bdae0b6188a191a6e9eb8f1024d7 (diff)
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btrfs: use bio iterators for the decompression handlers
Pass the full bio to the decompression routines and use bio iterators to iterate over the data in the bio. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs/lzo.c')
-rw-r--r--fs/btrfs/lzo.c17
1 files changed, 5 insertions, 12 deletions
diff --git a/fs/btrfs/lzo.c b/fs/btrfs/lzo.c
index 48655da0f4ca..45d26980caf9 100644
--- a/fs/btrfs/lzo.c
+++ b/fs/btrfs/lzo.c
@@ -254,25 +254,21 @@ out:
return ret;
}
-static int lzo_decompress_biovec(struct list_head *ws,
+static int lzo_decompress_bio(struct list_head *ws,
struct page **pages_in,
u64 disk_start,
- struct bio_vec *bvec,
- int vcnt,
+ struct bio *orig_bio,
size_t srclen)
{
struct workspace *workspace = list_entry(ws, struct workspace, list);
int ret = 0, ret2;
char *data_in;
unsigned long page_in_index = 0;
- unsigned long page_out_index = 0;
unsigned long total_pages_in = DIV_ROUND_UP(srclen, PAGE_SIZE);
unsigned long buf_start;
unsigned long buf_offset = 0;
unsigned long bytes;
unsigned long working_bytes;
- unsigned long pg_offset;
-
size_t in_len;
size_t out_len;
unsigned long in_offset;
@@ -292,7 +288,6 @@ static int lzo_decompress_biovec(struct list_head *ws,
in_page_bytes_left = PAGE_SIZE - LZO_LEN;
tot_out = 0;
- pg_offset = 0;
while (tot_in < tot_len) {
in_len = read_compress_length(data_in + in_offset);
@@ -365,16 +360,14 @@ cont:
tot_out += out_len;
ret2 = btrfs_decompress_buf2page(workspace->buf, buf_start,
- tot_out, disk_start,
- bvec, vcnt,
- &page_out_index, &pg_offset);
+ tot_out, disk_start, orig_bio);
if (ret2 == 0)
break;
}
done:
kunmap(pages_in[page_in_index]);
if (!ret)
- btrfs_clear_biovec_end(bvec, vcnt, page_out_index, pg_offset);
+ zero_fill_bio(orig_bio);
return ret;
}
@@ -438,6 +431,6 @@ const struct btrfs_compress_op btrfs_lzo_compress = {
.alloc_workspace = lzo_alloc_workspace,
.free_workspace = lzo_free_workspace,
.compress_pages = lzo_compress_pages,
- .decompress_biovec = lzo_decompress_biovec,
+ .decompress_bio = lzo_decompress_bio,
.decompress = lzo_decompress,
};