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authorChao Yu <yuchao0@huawei.com>2020-03-03 16:57:07 +0800
committerJaegeuk Kim <jaegeuk@kernel.org>2020-03-30 20:46:26 -0700
commit23b1faaade19a2aa2d4c3e387b875d105675343e (patch)
tree744b7ab3dde6ec4bb0a240d7bbe7f9179e4a31f7 /fs/f2fs/compress.c
parent09ff48011e220e2b4f1d9ce2f472ecb63645cbfc (diff)
f2fs: compress: add .{init,destroy}_decompress_ctx callback
Add below two callback interfaces in struct f2fs_compress_ops: int (*init_decompress_ctx)(struct decompress_io_ctx *dic); void (*destroy_decompress_ctx)(struct decompress_io_ctx *dic); Which will be used by zstd compress algorithm later. In addition, this patch adds callback function pointer check, so that specified algorithm can avoid defining unneeded functions. Signed-off-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs/compress.c')
-rw-r--r--fs/f2fs/compress.c27
1 files changed, 21 insertions, 6 deletions
diff --git a/fs/f2fs/compress.c b/fs/f2fs/compress.c
index 1e5bbb9c1d3e..13666735f567 100644
--- a/fs/f2fs/compress.c
+++ b/fs/f2fs/compress.c
@@ -20,6 +20,8 @@ struct f2fs_compress_ops {
int (*init_compress_ctx)(struct compress_ctx *cc);
void (*destroy_compress_ctx)(struct compress_ctx *cc);
int (*compress_pages)(struct compress_ctx *cc);
+ int (*init_decompress_ctx)(struct decompress_io_ctx *dic);
+ void (*destroy_decompress_ctx)(struct decompress_io_ctx *dic);
int (*decompress_pages)(struct decompress_io_ctx *dic);
};
@@ -332,9 +334,11 @@ static int f2fs_compress_pages(struct compress_ctx *cc)
trace_f2fs_compress_pages_start(cc->inode, cc->cluster_idx,
cc->cluster_size, fi->i_compress_algorithm);
- ret = cops->init_compress_ctx(cc);
- if (ret)
- goto out;
+ if (cops->init_compress_ctx) {
+ ret = cops->init_compress_ctx(cc);
+ if (ret)
+ goto out;
+ }
max_len = COMPRESS_HEADER_SIZE + cc->clen;
cc->nr_cpages = DIV_ROUND_UP(max_len, PAGE_SIZE);
@@ -396,7 +400,8 @@ static int f2fs_compress_pages(struct compress_ctx *cc)
cc->cpages[i] = NULL;
}
- cops->destroy_compress_ctx(cc);
+ if (cops->destroy_compress_ctx)
+ cops->destroy_compress_ctx(cc);
cc->nr_cpages = nr_cpages;
@@ -416,7 +421,8 @@ out_free_cpages:
kfree(cc->cpages);
cc->cpages = NULL;
destroy_compress_ctx:
- cops->destroy_compress_ctx(cc);
+ if (cops->destroy_compress_ctx)
+ cops->destroy_compress_ctx(cc);
out:
trace_f2fs_compress_pages_end(cc->inode, cc->cluster_idx,
cc->clen, ret);
@@ -450,10 +456,16 @@ void f2fs_decompress_pages(struct bio *bio, struct page *page, bool verity)
goto out_free_dic;
}
+ if (cops->init_decompress_ctx) {
+ ret = cops->init_decompress_ctx(dic);
+ if (ret)
+ goto out_free_dic;
+ }
+
dic->rbuf = vmap(dic->tpages, dic->cluster_size, VM_MAP, PAGE_KERNEL);
if (!dic->rbuf) {
ret = -ENOMEM;
- goto out_free_dic;
+ goto destroy_decompress_ctx;
}
dic->cbuf = vmap(dic->cpages, dic->nr_cpages, VM_MAP, PAGE_KERNEL_RO);
@@ -476,6 +488,9 @@ out_vunmap_cbuf:
vunmap(dic->cbuf);
out_vunmap_rbuf:
vunmap(dic->rbuf);
+destroy_decompress_ctx:
+ if (cops->destroy_decompress_ctx)
+ cops->destroy_decompress_ctx(dic);
out_free_dic:
if (verity)
refcount_set(&dic->ref, dic->nr_cpages);