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Commit 0f49cf3d authored by Nicholas Swenson's avatar Nicholas Swenson Committed by Kent Overstreet
Browse files

bcache: update bch_bkey_try_merge 



Added generic header checks to bch_bkey_try_merge,
which then calls the bkey specific function

Removed extraneous checks from bch_extent_merge

Signed-off-by: default avatarNicholas Swenson <nks@daterainc.com>
parent 829a60b9

drivers/md/bcache/bset.c

+27 −0
Original line number Diff line number Diff line
@@ -773,6 +773,33 @@ static void bch_bset_fix_lookup_table(struct btree_keys *b, 
		}

}



/*

 * Tries to merge l and r: l should be lower than r

 * Returns true if we were able to merge. If we did merge, l will be the merged

 * key, r will be untouched.

 */

bool bch_bkey_try_merge(struct btree_keys *b, struct bkey *l, struct bkey *r)

{

	if (!b->ops->key_merge)

		return false;



	/*

	 * Generic header checks

	 * Assumes left and right are in order

	 * Left and right must be exactly aligned

	 */

	if (KEY_U64s(l) != KEY_U64s(r) ||

	    KEY_DELETED(l) != KEY_DELETED(r) ||

	    KEY_CACHED(l) != KEY_CACHED(r) ||

	    KEY_VERSION(l) != KEY_VERSION(r) ||

	    KEY_CSUM(l) != KEY_CSUM(r) ||

	    bkey_cmp(l, &START_KEY(r)))

		return false;



	return b->ops->key_merge(b, l, r);

}

EXPORT_SYMBOL(bch_bkey_try_merge);



void bch_bset_insert(struct btree_keys *b, struct bkey *where,

		     struct bkey *insert)

{

drivers/md/bcache/bset.h

+1 −11
Original line number Diff line number Diff line
@@ -287,6 +287,7 @@ void bch_btree_keys_init(struct btree_keys *, const struct btree_keys_ops *, 
void bch_bset_init_next(struct btree_keys *, struct bset *, uint64_t);

void bch_bset_build_written_tree(struct btree_keys *);

void bch_bset_fix_invalidated_key(struct btree_keys *, struct bkey *);

bool bch_bkey_try_merge(struct btree_keys *, struct bkey *, struct bkey *);

void bch_bset_insert(struct btree_keys *, struct bkey *, struct bkey *);

unsigned bch_btree_insert_key(struct btree_keys *, struct bkey *,

			      struct bkey *);
@@ -299,17 +300,6 @@ enum { 
	BTREE_INSERT_STATUS_FRONT_MERGE,

};



/*

 * Tries to merge l and r: l should be lower than r

 * Returns true if we were able to merge. If we did merge, l will be the merged

 * key, r will be untouched.

 */

static inline bool bch_bkey_try_merge(struct btree_keys *b,

				      struct bkey *l, struct bkey *r)

{

	return b->ops->key_merge ?  b->ops->key_merge(b, l, r) : false;

}



/* Btree key iteration */



struct btree_iter {

drivers/md/bcache/extents.c

+0 −5
Original line number Diff line number Diff line
@@ -575,11 +575,6 @@ static bool bch_extent_merge(struct btree_keys *bk, struct bkey *l, struct bkey 
	if (key_merging_disabled(b->c))

		return false;



	if (KEY_PTRS(l) != KEY_PTRS(r) ||

	    KEY_DIRTY(l) != KEY_DIRTY(r) ||

	    bkey_cmp(l, &START_KEY(r)))

		return false;



	for (i = 0; i < KEY_PTRS(l); i++)

		if (l->ptr[i] + PTR(0, KEY_SIZE(l), 0) != r->ptr[i] ||

		    PTR_BUCKET_NR(b->c, l, i) != PTR_BUCKET_NR(b->c, r, i))