-#ifndef _BCACHE_CHECKSUM_H
-#define _BCACHE_CHECKSUM_H
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _BCACHEFS_CHECKSUM_H
+#define _BCACHEFS_CHECKSUM_H
#include "bcachefs.h"
+#include "extents_types.h"
#include "super-io.h"
-#include <crypto/chacha20.h>
+#include <linux/crc64.h>
+#include <crypto/chacha.h>
-u64 bch2_crc64_update(u64, const void *, size_t);
+static inline bool bch2_checksum_mergeable(unsigned type)
+{
+
+ switch (type) {
+ case BCH_CSUM_none:
+ case BCH_CSUM_crc32c:
+ case BCH_CSUM_crc64:
+ return true;
+ default:
+ return false;
+ }
+}
+
+struct bch_csum bch2_checksum_merge(unsigned, struct bch_csum,
+ struct bch_csum, size_t);
#define BCH_NONCE_EXTENT cpu_to_le32(1 << 28)
#define BCH_NONCE_BTREE cpu_to_le32(2 << 28)
int bch2_chacha_encrypt_key(struct bch_key *, struct nonce, void *, size_t);
int bch2_request_key(struct bch_sb *, struct bch_key *);
-void bch2_encrypt(struct bch_fs *, unsigned, struct nonce,
+int bch2_encrypt(struct bch_fs *, unsigned, struct nonce,
void *data, size_t);
struct bch_csum bch2_checksum_bio(struct bch_fs *, unsigned,
- struct nonce, struct bio *);
-void bch2_encrypt_bio(struct bch_fs *, unsigned,
- struct nonce, struct bio *);
+ struct nonce, struct bio *);
+
+int bch2_rechecksum_bio(struct bch_fs *, struct bio *, struct bversion,
+ struct bch_extent_crc_unpacked,
+ struct bch_extent_crc_unpacked *,
+ struct bch_extent_crc_unpacked *,
+ unsigned, unsigned, unsigned);
+
+int bch2_encrypt_bio(struct bch_fs *, unsigned,
+ struct nonce, struct bio *);
+
+int bch2_decrypt_sb_key(struct bch_fs *, struct bch_sb_field_crypt *,
+ struct bch_key *);
int bch2_disable_encryption(struct bch_fs *);
int bch2_enable_encryption(struct bch_fs *, bool);
void bch2_fs_encryption_exit(struct bch_fs *);
int bch2_fs_encryption_init(struct bch_fs *);
-static inline unsigned bch2_data_checksum_type(struct bch_fs *c)
+static inline enum bch_csum_type bch2_csum_opt_to_type(enum bch_csum_opts type,
+ bool data)
+{
+ switch (type) {
+ case BCH_CSUM_OPT_none:
+ return BCH_CSUM_none;
+ case BCH_CSUM_OPT_crc32c:
+ return data ? BCH_CSUM_crc32c : BCH_CSUM_crc32c_nonzero;
+ case BCH_CSUM_OPT_crc64:
+ return data ? BCH_CSUM_crc64 : BCH_CSUM_crc64_nonzero;
+ case BCH_CSUM_OPT_xxhash:
+ return BCH_CSUM_xxhash;
+ default:
+ BUG();
+ }
+}
+
+static inline enum bch_csum_type bch2_data_checksum_type(struct bch_fs *c,
+ unsigned opt)
{
if (c->sb.encryption_type)
return c->opts.wide_macs
- ? BCH_CSUM_CHACHA20_POLY1305_128
- : BCH_CSUM_CHACHA20_POLY1305_80;
+ ? BCH_CSUM_chacha20_poly1305_128
+ : BCH_CSUM_chacha20_poly1305_80;
- return c->opts.data_checksum;
+ return bch2_csum_opt_to_type(opt, true);
}
-static inline unsigned bch2_meta_checksum_type(struct bch_fs *c)
+static inline enum bch_csum_type bch2_meta_checksum_type(struct bch_fs *c)
{
- return c->sb.encryption_type
- ? BCH_CSUM_CHACHA20_POLY1305_128
- : c->opts.metadata_checksum;
+ if (c->sb.encryption_type)
+ return BCH_CSUM_chacha20_poly1305_128;
+
+ return bch2_csum_opt_to_type(c->opts.metadata_checksum, false);
}
+static const unsigned bch2_compression_opt_to_type[] = {
+#define x(t, n) [BCH_COMPRESSION_OPT_##t] = BCH_COMPRESSION_TYPE_##t,
+ BCH_COMPRESSION_OPTS()
+#undef x
+};
+
static inline bool bch2_checksum_type_valid(const struct bch_fs *c,
unsigned type)
{
return true;
}
-static const unsigned bch_crc_bytes[] = {
- [BCH_CSUM_NONE] = 0,
- [BCH_CSUM_CRC32C] = 4,
- [BCH_CSUM_CRC64] = 8,
- [BCH_CSUM_CHACHA20_POLY1305_80] = 10,
- [BCH_CSUM_CHACHA20_POLY1305_128] = 16,
-};
-
+/* returns true if not equal */
static inline bool bch2_crc_cmp(struct bch_csum l, struct bch_csum r)
{
/*
/* for skipping ahead and encrypting/decrypting at an offset: */
static inline struct nonce nonce_add(struct nonce nonce, unsigned offset)
{
- EBUG_ON(offset & (CHACHA20_BLOCK_SIZE - 1));
+ EBUG_ON(offset & (CHACHA_BLOCK_SIZE - 1));
- le32_add_cpu(&nonce.d[0], offset / CHACHA20_BLOCK_SIZE);
+ le32_add_cpu(&nonce.d[0], offset / CHACHA_BLOCK_SIZE);
return nonce;
}
+static inline struct nonce null_nonce(void)
+{
+ struct nonce ret;
+
+ memset(&ret, 0, sizeof(ret));
+ return ret;
+}
+
+static inline struct nonce extent_nonce(struct bversion version,
+ struct bch_extent_crc_unpacked crc)
+{
+ unsigned compression_type = crc_is_compressed(crc)
+ ? crc.compression_type
+ : 0;
+ unsigned size = compression_type ? crc.uncompressed_size : 0;
+ struct nonce nonce = (struct nonce) {{
+ [0] = cpu_to_le32(size << 22),
+ [1] = cpu_to_le32(version.lo),
+ [2] = cpu_to_le32(version.lo >> 32),
+ [3] = cpu_to_le32(version.hi|
+ (compression_type << 24))^BCH_NONCE_EXTENT,
+ }};
+
+ return nonce_add(nonce, crc.nonce << 9);
+}
+
static inline bool bch2_key_is_encrypted(struct bch_encrypted_key *key)
{
return le64_to_cpu(key->magic) != BCH_KEY_MAGIC;
}};
}
-#endif /* _BCACHE_CHECKSUM_H */
+#endif /* _BCACHEFS_CHECKSUM_H */
projects / bcachefs-tools-debian / blobdiff