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bcache: Add bch_bkey_equal_header()
Checks if two keys have equivalent header fields. (good enough for replacement or merging) Used in bch_bkey_try_merge, and replacing a key in the btree. Signed-off-by: Nicholas Swenson <nks@daterainc.com> Signed-off-by: Kent Overstreet <kmo@daterainc.com>
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3 changed files with 11 additions and 8 deletions
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@ -788,12 +788,8 @@ bool bch_bkey_try_merge(struct btree_keys *b, struct bkey *l, struct bkey *r)
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* Assumes left and right are in order
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* Left and right must be exactly aligned
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*/
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if (KEY_U64s(l) != KEY_U64s(r) ||
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KEY_DELETED(l) != KEY_DELETED(r) ||
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KEY_CACHED(l) != KEY_CACHED(r) ||
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KEY_VERSION(l) != KEY_VERSION(r) ||
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KEY_CSUM(l) != KEY_CSUM(r) ||
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bkey_cmp(l, &START_KEY(r)))
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if (!bch_bkey_equal_header(l, r) ||
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bkey_cmp(l, &START_KEY(r)))
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return false;
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return b->ops->key_merge(b, l, r);
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@ -448,6 +448,14 @@ static inline void bch_bkey_to_text(struct btree_keys *b, char *buf,
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return b->ops->key_to_text(buf, size, k);
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}
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static inline bool bch_bkey_equal_header(const struct bkey *l,
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const struct bkey *r)
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{
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return (KEY_DIRTY(l) == KEY_DIRTY(r) &&
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KEY_PTRS(l) == KEY_PTRS(r) &&
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KEY_CSUM(l) == KEY_CSUM(l));
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}
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/* Keylists */
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struct keylist {
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@ -372,8 +372,7 @@ static bool bch_extent_insert_fixup(struct btree_keys *b,
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if (KEY_START(k) > KEY_START(insert) + sectors_found)
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goto check_failed;
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if (KEY_PTRS(k) != KEY_PTRS(replace_key) ||
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KEY_DIRTY(k) != KEY_DIRTY(replace_key))
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if (!bch_bkey_equal_header(k, replace_key))
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goto check_failed;
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/* skip past gen */
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