Update bcachefs sources to 8e1519ccb6 bcachefs: Add tracepoint & counter for btree...

[bcachefs-tools-debian] / libbcachefs / checksum.h

diff --git a/libbcachefs/checksum.h b/libbcachefs/checksum.h
index 2690cc4baeead200b0fb1fb9bdadcd9ce8d2a703..409ad534d9f40c23efd94817349ca1eeffb4ff44 100644 (file)
--- a/libbcachefs/checksum.h
+++ b/libbcachefs/checksum.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef _BCACHEFS_CHECKSUM_H
 #define _BCACHEFS_CHECKSUM_H
 
@@ -5,9 +6,24 @@
 #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)
@@ -33,7 +49,7 @@ struct bch_csum bch2_checksum(struct bch_fs *, unsigned, struct nonce,
 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,
@@ -45,8 +61,16 @@ int bch2_rechecksum_bio(struct bch_fs *, struct bio *, struct bversion,
                        struct bch_extent_crc_unpacked *,
                        unsigned, unsigned, unsigned);
 
-void bch2_encrypt_bio(struct bch_fs *, unsigned,
-                   struct nonce, struct bio *);
+int __bch2_encrypt_bio(struct bch_fs *, unsigned,
+                      struct nonce, struct bio *);
+
+static inline int bch2_encrypt_bio(struct bch_fs *c, unsigned type,
+                                  struct nonce nonce, struct bio *bio)
+{
+       return bch2_csum_type_is_encryption(type)
+               ? __bch2_encrypt_bio(c, type, nonce, bio)
+               : 0;
+}
 
 int bch2_decrypt_sb_key(struct bch_fs *, struct bch_sb_field_crypt *,
                        struct bch_key *);
@@ -61,39 +85,44 @@ 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_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();
+               BUG();
        }
 }
 
 static inline enum bch_csum_type bch2_data_checksum_type(struct bch_fs *c,
-                                                        unsigned opt)
+                                                        struct bch_io_opts opts)
 {
+       if (opts.nocow)
+               return 0;
+
        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 bch2_csum_opt_to_type(opt, true);
+       return bch2_csum_opt_to_type(opts.data_checksum, true);
 }
 
 static inline enum bch_csum_type bch2_meta_checksum_type(struct bch_fs *c)
 {
        if (c->sb.encryption_type)
-               return BCH_CSUM_CHACHA20_POLY1305_128;
+               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) [BCH_COMPRESSION_OPT_##t] = BCH_COMPRESSION_##t,
-       BCH_COMPRESSION_TYPES()
+#define x(t, n) [BCH_COMPRESSION_OPT_##t] = BCH_COMPRESSION_TYPE_##t,
+       BCH_COMPRESSION_OPTS()
 #undef x
 };
 
@@ -109,14 +138,6 @@ static inline bool bch2_checksum_type_valid(const struct bch_fs *c,
        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)
 {
@@ -130,9 +151,9 @@ 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;
 }
 
@@ -147,13 +168,16 @@ static inline struct nonce null_nonce(void)
 static inline struct nonce extent_nonce(struct bversion version,
                                        struct bch_extent_crc_unpacked crc)
 {
-       unsigned size = crc.compression_type ? crc.uncompressed_size : 0;
+       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|
-                                 (crc.compression_type << 24))^BCH_NONCE_EXTENT,
+                                 (compression_type << 24))^BCH_NONCE_EXTENT,
        }};
 
        return nonce_add(nonce, crc.nonce << 9);