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authorSheng Yong <shengyong@oppo.com>2023-06-12 06:01:16 +0300
committerJaegeuk Kim <jaegeuk@kernel.org>2023-06-26 16:07:09 +0300
commitc571fbb5b59a3741e48014faa92c2f14bc59fe50 (patch)
tree80ccef93aba61fa59e7a65859fade267a837c3fa /fs/f2fs/compress.c
parent94c8431fb46bfbe51bd3eb68687334797af0a221 (diff)
downloadlinux-c571fbb5b59a3741e48014faa92c2f14bc59fe50.tar.xz
f2fs: add helper to check compression level
This patch adds a helper function to check if compression level is valid. Signed-off-by: Sheng Yong <shengyong@oppo.com> Reviewed-by: Chao Yu <chao@kernel.org> 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, 27 insertions, 0 deletions
diff --git a/fs/f2fs/compress.c b/fs/f2fs/compress.c
index 438af59d3571..236d890f560b 100644
--- a/fs/f2fs/compress.c
+++ b/fs/f2fs/compress.c
@@ -55,6 +55,7 @@ struct f2fs_compress_ops {
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);
+ bool (*is_level_valid)(int level);
};
static unsigned int offset_in_cluster(struct compress_ctx *cc, pgoff_t index)
@@ -308,11 +309,21 @@ static int lz4_decompress_pages(struct decompress_io_ctx *dic)
return 0;
}
+static bool lz4_is_level_valid(int lvl)
+{
+#ifdef CONFIG_F2FS_FS_LZ4HC
+ return !lvl || (lvl >= LZ4HC_MIN_CLEVEL && lvl <= LZ4HC_MAX_CLEVEL);
+#else
+ return lvl == 0;
+#endif
+}
+
static const struct f2fs_compress_ops f2fs_lz4_ops = {
.init_compress_ctx = lz4_init_compress_ctx,
.destroy_compress_ctx = lz4_destroy_compress_ctx,
.compress_pages = lz4_compress_pages,
.decompress_pages = lz4_decompress_pages,
+ .is_level_valid = lz4_is_level_valid,
};
#endif
@@ -476,6 +487,11 @@ static int zstd_decompress_pages(struct decompress_io_ctx *dic)
return 0;
}
+static bool zstd_is_level_valid(int lvl)
+{
+ return lvl >= zstd_min_clevel() && lvl <= zstd_max_clevel();
+}
+
static const struct f2fs_compress_ops f2fs_zstd_ops = {
.init_compress_ctx = zstd_init_compress_ctx,
.destroy_compress_ctx = zstd_destroy_compress_ctx,
@@ -483,6 +499,7 @@ static const struct f2fs_compress_ops f2fs_zstd_ops = {
.init_decompress_ctx = zstd_init_decompress_ctx,
.destroy_decompress_ctx = zstd_destroy_decompress_ctx,
.decompress_pages = zstd_decompress_pages,
+ .is_level_valid = zstd_is_level_valid,
};
#endif
@@ -541,6 +558,16 @@ bool f2fs_is_compress_backend_ready(struct inode *inode)
return f2fs_cops[F2FS_I(inode)->i_compress_algorithm];
}
+bool f2fs_is_compress_level_valid(int alg, int lvl)
+{
+ const struct f2fs_compress_ops *cops = f2fs_cops[alg];
+
+ if (cops->is_level_valid)
+ return cops->is_level_valid(lvl);
+
+ return lvl == 0;
+}
+
static mempool_t *compress_page_pool;
static int num_compress_pages = 512;
module_param(num_compress_pages, uint, 0444);