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| author | Dan Robertson <dan@dlrobertson.com> | 2021-05-14 20:02:44 -0400 |
|---|---|---|
| committer | Kent Overstreet <kent.overstreet@linux.dev> | 2023-10-22 17:09:03 -0400 |
| commit | d125615a4e22194dff9cecd12ec5a608f8c0f920 (patch) | |
| tree | 595668abd79b6e0c1fb295dce911a877e3171703 /fs/bcachefs/str_hash.h | |
| parent | e1036ce5810222620c98660d64ccc649652cf6c9 (diff) | |
| download | linux-stable-d125615a4e22194dff9cecd12ec5a608f8c0f920.tar.gz linux-stable-d125615a4e22194dff9cecd12ec5a608f8c0f920.tar.bz2 linux-stable-d125615a4e22194dff9cecd12ec5a608f8c0f920.zip | |
bcachefs: properly initialize used values
- Ensure the second key value in bch_hash_info is initialized to zero
if the info type is of type BCH_STR_HASH_SIPHASH.
- Initialize the possibly returned value in bch2_inode_create. Assuming
bch2_btree_iter_peek returns bkey_s_c_null, the uninitialized value
of ret could be returned to the user as an error pointer.
- Fix compiler warning in initialization of bkey_s_c_stripe
fs/bcachefs/buckets.c:1646:35: warning: suggest braces around initialization
of subobject [-Wmissing-braces]
struct bkey_s_c_stripe new_s = { NULL };
^~~~
Signed-off-by: Dan Robertson <dan@dlrobertson.com>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Diffstat (limited to 'fs/bcachefs/str_hash.h')
| -rw-r--r-- | fs/bcachefs/str_hash.h | 17 |
1 files changed, 10 insertions, 7 deletions
diff --git a/fs/bcachefs/str_hash.h b/fs/bcachefs/str_hash.h index b85f895de346..eab669af7032 100644 --- a/fs/bcachefs/str_hash.h +++ b/fs/bcachefs/str_hash.h @@ -33,10 +33,11 @@ bch2_str_hash_opt_to_type(struct bch_fs *c, enum bch_str_hash_opts opt) 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 @@ -46,7 +47,7 @@ bch2_hash_info_init(struct bch_fs *c, const struct bch_inode_unpacked *bi) struct bch_hash_info info = { .type = (bi->bi_flags >> INODE_STR_HASH_OFFSET) & ~(~0U << INODE_STR_HASH_BITS), - .crc_key = bi->bi_hash_seed, + .siphash_key = { .k0 = bi->bi_hash_seed } }; if (unlikely(info.type == BCH_STR_HASH_SIPHASH_OLD)) { @@ -76,10 +77,12 @@ static inline void bch2_str_hash_init(struct bch_str_hash_ctx *ctx, { 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: |