#include <linux/crc32c.h>
#include <crypto/hash.h>
-#include <crypto/sha.h>
+#include <crypto/sha2.h>
+
+static inline enum bch_str_hash_type
+bch2_str_hash_opt_to_type(struct bch_fs *c, enum bch_str_hash_opts opt)
+{
+ switch (opt) {
+ case BCH_STR_HASH_OPT_crc32c:
+ return BCH_STR_HASH_CRC32C;
+ case BCH_STR_HASH_OPT_crc64:
+ return BCH_STR_HASH_CRC64;
+ case BCH_STR_HASH_OPT_siphash:
+ return c->sb.features & (1ULL << BCH_FEATURE_new_siphash)
+ ? BCH_STR_HASH_SIPHASH
+ : BCH_STR_HASH_SIPHASH_OLD;
+ default:
+ BUG();
+ }
+}
struct bch_hash_info {
u8 type;
- union {
- __le64 crc_key;
- SIPHASH_KEY siphash_key;
- };
+ /*
+ * For crc32 or crc64 string hashes the first key value of
+ * the siphash_key (k0) is used as the key.
+ */
+ SIPHASH_KEY siphash_key;
};
static inline struct bch_hash_info
-bch2_hash_info_init(struct bch_fs *c,
- const struct bch_inode_unpacked *bi)
+bch2_hash_info_init(struct bch_fs *c, const struct bch_inode_unpacked *bi)
{
/* XXX ick */
struct bch_hash_info info = {
.type = (bi->bi_flags >> INODE_STR_HASH_OFFSET) &
- ~(~0U << INODE_STR_HASH_BITS)
+ ~(~0U << INODE_STR_HASH_BITS),
+ .siphash_key = { .k0 = bi->bi_hash_seed }
};
- switch (info.type) {
- case BCH_STR_HASH_CRC32C:
- case BCH_STR_HASH_CRC64:
- info.crc_key = bi->bi_hash_seed;
- break;
- case BCH_STR_HASH_SIPHASH: {
+ if (unlikely(info.type == BCH_STR_HASH_SIPHASH_OLD)) {
SHASH_DESC_ON_STACK(desc, c->sha256);
u8 digest[SHA256_DIGEST_SIZE];
crypto_shash_digest(desc, (void *) &bi->bi_hash_seed,
sizeof(bi->bi_hash_seed), digest);
memcpy(&info.siphash_key, digest, sizeof(info.siphash_key));
- break;
- }
- default:
- BUG();
}
return info;
{
switch (info->type) {
case BCH_STR_HASH_CRC32C:
- ctx->crc32c = crc32c(~0, &info->crc_key, sizeof(info->crc_key));
+ ctx->crc32c = crc32c(~0, &info->siphash_key.k0,
+ sizeof(info->siphash_key.k0));
break;
case BCH_STR_HASH_CRC64:
- ctx->crc64 = crc64_be(~0, &info->crc_key, sizeof(info->crc_key));
+ ctx->crc64 = crc64_be(~0, &info->siphash_key.k0,
+ sizeof(info->siphash_key.k0));
break;
+ case BCH_STR_HASH_SIPHASH_OLD:
case BCH_STR_HASH_SIPHASH:
SipHash24_Init(&ctx->siphash, &info->siphash_key);
break;
case BCH_STR_HASH_CRC64:
ctx->crc64 = crc64_be(ctx->crc64, data, len);
break;
+ case BCH_STR_HASH_SIPHASH_OLD:
case BCH_STR_HASH_SIPHASH:
SipHash24_Update(&ctx->siphash, data, len);
break;
return ctx->crc32c;
case BCH_STR_HASH_CRC64:
return ctx->crc64 >> 1;
+ case BCH_STR_HASH_SIPHASH_OLD:
case BCH_STR_HASH_SIPHASH:
return SipHash24_End(&ctx->siphash) >> 1;
default:
bool (*cmp_bkey)(struct bkey_s_c, struct bkey_s_c);
};
-static __always_inline struct btree_iter *
+static __always_inline int
bch2_hash_lookup(struct btree_trans *trans,
+ struct btree_iter *iter,
const struct bch_hash_desc desc,
const struct bch_hash_info *info,
u64 inode, const void *key,
unsigned flags)
{
- struct btree_iter *iter;
struct bkey_s_c k;
int ret;
- for_each_btree_key(trans, iter, desc.btree_id,
+ for_each_btree_key(trans, *iter, desc.btree_id,
POS(inode, desc.hash_key(info, key)),
BTREE_ITER_SLOTS|flags, k, ret) {
if (iter->pos.inode != inode)
if (k.k->type == desc.key_type) {
if (!desc.cmp_key(k, key))
- return iter;
- } else if (k.k->type == KEY_TYPE_whiteout) {
+ return 0;
+ } else if (k.k->type == KEY_TYPE_hash_whiteout) {
;
} else {
/* hole, not found */
break;
}
}
+ bch2_trans_iter_exit(trans, iter);
- return ERR_PTR(ret ?: -ENOENT);
+ return ret ?: -ENOENT;
}
-static __always_inline struct btree_iter *
+static __always_inline int
bch2_hash_hole(struct btree_trans *trans,
+ struct btree_iter *iter,
const struct bch_hash_desc desc,
const struct bch_hash_info *info,
u64 inode, const void *key)
{
- struct btree_iter *iter;
struct bkey_s_c k;
int ret;
- for_each_btree_key(trans, iter, desc.btree_id,
+ for_each_btree_key(trans, *iter, desc.btree_id,
POS(inode, desc.hash_key(info, key)),
BTREE_ITER_SLOTS|BTREE_ITER_INTENT, k, ret) {
if (iter->pos.inode != inode)
break;
if (k.k->type != desc.key_type)
- return iter;
+ return 0;
}
+ bch2_trans_iter_exit(trans, iter);
- return ERR_PTR(ret ?: -ENOSPC);
+ return ret ?: -ENOSPC;
}
static __always_inline
const struct bch_hash_info *info,
struct btree_iter *start)
{
- struct btree_iter *iter;
+ struct btree_iter iter;
struct bkey_s_c k;
int ret;
- iter = bch2_trans_copy_iter(trans, start);
- if (IS_ERR(iter))
- return PTR_ERR(iter);
+ bch2_trans_copy_iter(&iter, start);
- bch2_btree_iter_next_slot(iter);
+ bch2_btree_iter_advance(&iter);
for_each_btree_key_continue(iter, BTREE_ITER_SLOTS, k, ret) {
if (k.k->type != desc.key_type &&
- k.k->type != KEY_TYPE_whiteout)
+ k.k->type != KEY_TYPE_hash_whiteout)
break;
if (k.k->type == desc.key_type &&
desc.hash_bkey(info, k) <= start->pos.offset) {
- iter->flags |= BTREE_ITER_KEEP_UNTIL_COMMIT;
ret = 1;
break;
}
}
- bch2_trans_iter_put(trans, iter);
+ bch2_trans_iter_exit(trans, &iter);
return ret;
}
const struct bch_hash_info *info,
u64 inode, struct bkey_i *insert, int flags)
{
- struct btree_iter *iter, *slot = NULL;
+ struct btree_iter iter, slot = { NULL };
struct bkey_s_c k;
bool found = false;
int ret;
for_each_btree_key(trans, iter, desc.btree_id,
POS(inode, desc.hash_bkey(info, bkey_i_to_s_c(insert))),
BTREE_ITER_SLOTS|BTREE_ITER_INTENT, k, ret) {
- if (iter->pos.inode != inode)
+ if (iter.pos.inode != inode)
break;
if (k.k->type == desc.key_type) {
continue;
}
- if (!slot &&
- !(flags & BCH_HASH_SET_MUST_REPLACE)) {
- slot = bch2_trans_copy_iter(trans, iter);
- if (IS_ERR(slot))
- return PTR_ERR(slot);
- }
+ if (!slot.path &&
+ !(flags & BCH_HASH_SET_MUST_REPLACE))
+ bch2_trans_copy_iter(&slot, &iter);
- if (k.k->type != KEY_TYPE_whiteout)
+ if (k.k->type != KEY_TYPE_hash_whiteout)
goto not_found;
}
if (!ret)
ret = -ENOSPC;
out:
- if (slot)
- bch2_trans_iter_put(trans, slot);
- bch2_trans_iter_put(trans, iter);
+ bch2_trans_iter_exit(trans, &slot);
+ bch2_trans_iter_exit(trans, &iter);
return ret;
found:
} else if (found && (flags & BCH_HASH_SET_MUST_CREATE)) {
ret = -EEXIST;
} else {
- if (!found && slot)
+ if (!found && slot.path)
swap(iter, slot);
- insert->k.p = iter->pos;
- bch2_trans_update(trans, iter, insert);
+ insert->k.p = iter.pos;
+ ret = bch2_trans_update(trans, &iter, insert, 0);
}
goto out;
struct bkey_i *delete;
int ret;
+ delete = bch2_trans_kmalloc(trans, sizeof(*delete));
+ ret = PTR_ERR_OR_ZERO(delete);
+ if (ret)
+ return ret;
+
ret = bch2_hash_needs_whiteout(trans, desc, info, iter);
if (ret < 0)
return ret;
- delete = bch2_trans_kmalloc(trans, sizeof(*delete));
- if (IS_ERR(delete))
- return PTR_ERR(delete);
-
bkey_init(&delete->k);
delete->k.p = iter->pos;
- delete->k.type = ret ? KEY_TYPE_whiteout : KEY_TYPE_deleted;
+ delete->k.type = ret ? KEY_TYPE_hash_whiteout : KEY_TYPE_deleted;
- bch2_trans_update(trans, iter, delete);
- return 0;
+ return bch2_trans_update(trans, iter, delete, 0);
}
static __always_inline
const struct bch_hash_info *info,
u64 inode, const void *key)
{
- struct btree_iter *iter;
+ struct btree_iter iter;
+ int ret;
- iter = bch2_hash_lookup(trans, desc, info, inode, key,
+ ret = bch2_hash_lookup(trans, &iter, desc, info, inode, key,
BTREE_ITER_INTENT);
- if (IS_ERR(iter))
- return PTR_ERR(iter);
+ if (ret)
+ return ret;
- return bch2_hash_delete_at(trans, desc, info, iter);
+ ret = bch2_hash_delete_at(trans, desc, info, &iter);
+ bch2_trans_iter_exit(trans, &iter);
+ return ret;
}
#endif /* _BCACHEFS_STR_HASH_H */
projects / bcachefs-tools-debian / blobdiff