bcachefs: bch_str_hash_flags_t

Create a separate enum for str_hash flags - instead of abusing the
btree_insert_flags enum - and create a __bitwise typedef for sparse
typechecking.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

fs/bcachefs/btree_update.h

@@ -28,8 +28,6 @@ enum btree_insert_flags {
 	__BTREE_INSERT_LAZY_RW,
 	__BTREE_INSERT_JOURNAL_REPLAY,
 	__BTREE_INSERT_JOURNAL_RECLAIM,
-	__BCH_HASH_SET_MUST_CREATE,
-	__BCH_HASH_SET_MUST_REPLACE,
 };
 
 /* Don't check for -ENOSPC: */
@@ -44,9 +42,6 @@ enum btree_insert_flags {
 /* Insert is being called from journal reclaim path: */
 #define BTREE_INSERT_JOURNAL_RECLAIM	BIT(__BTREE_INSERT_JOURNAL_RECLAIM)
 
-#define BCH_HASH_SET_MUST_CREATE	BIT(__BCH_HASH_SET_MUST_CREATE)
-#define BCH_HASH_SET_MUST_REPLACE	BIT(__BCH_HASH_SET_MUST_REPLACE)
-
 int bch2_btree_delete_extent_at(struct btree_trans *, struct btree_iter *,
 				unsigned, unsigned);
 int bch2_btree_delete_at(struct btree_trans *, struct btree_iter *, unsigned);

fs/bcachefs/dirent.c

@@ -201,7 +201,8 @@ static struct bkey_i_dirent *dirent_create_key(struct btree_trans *trans,
 int bch2_dirent_create(struct btree_trans *trans, subvol_inum dir,
 		       const struct bch_hash_info *hash_info,
 		       u8 type, const struct qstr *name, u64 dst_inum,
-		       u64 *dir_offset, int flags)
+		       u64 *dir_offset,
+		       bch_str_hash_flags_t str_hash_flags)
 {
 	struct bkey_i_dirent *dirent;
 	int ret;
@@ -212,7 +213,7 @@ int bch2_dirent_create(struct btree_trans *trans, subvol_inum dir,
 		return ret;
 
 	ret = bch2_hash_set(trans, bch2_dirent_hash_desc, hash_info,
-			    dir, &dirent->k_i, flags);
+			    dir, &dirent->k_i, str_hash_flags);
 	*dir_offset = dirent->k.p.offset;
 
 	return ret;

fs/bcachefs/dirent.h

@@ -37,7 +37,8 @@ int bch2_dirent_read_target(struct btree_trans *, subvol_inum,
 
 int bch2_dirent_create(struct btree_trans *, subvol_inum,
 		       const struct bch_hash_info *, u8,
-		       const struct qstr *, u64, u64 *, int);
+		       const struct qstr *, u64, u64 *,
+		       bch_str_hash_flags_t);
 
 static inline unsigned vfs_d_type(unsigned type)
 {

fs/bcachefs/str_hash.h

@@ -15,6 +15,16 @@
 #include <crypto/hash.h>
 #include <crypto/sha2.h>
 
+typedef unsigned __bitwise bch_str_hash_flags_t;
+
+enum bch_str_hash_flags {
+	__BCH_HASH_SET_MUST_CREATE,
+	__BCH_HASH_SET_MUST_REPLACE,
+};
+
+#define BCH_HASH_SET_MUST_CREATE	(__force bch_str_hash_flags_t) BIT(__BCH_HASH_SET_MUST_CREATE)
+#define BCH_HASH_SET_MUST_REPLACE	(__force bch_str_hash_flags_t) BIT(__BCH_HASH_SET_MUST_REPLACE)
+
 static inline enum bch_str_hash_type
 bch2_str_hash_opt_to_type(struct bch_fs *c, enum bch_str_hash_opts opt)
 {
@@ -246,7 +256,7 @@ int bch2_hash_set_snapshot(struct btree_trans *trans,
 			   const struct bch_hash_info *info,
 			   subvol_inum inum, u32 snapshot,
 			   struct bkey_i *insert,
-			   int flags,
+			   bch_str_hash_flags_t str_hash_flags,
 			   int update_flags)
 {
 	struct btree_iter iter, slot = { NULL };
@@ -269,7 +279,7 @@ int bch2_hash_set_snapshot(struct btree_trans *trans,
 		}
 
 		if (!slot.path &&
-		    !(flags & BCH_HASH_SET_MUST_REPLACE))
+		    !(str_hash_flags & BCH_HASH_SET_MUST_REPLACE))
 			bch2_trans_copy_iter(&slot, &iter);
 
 		if (k.k->type != KEY_TYPE_hash_whiteout)
@@ -287,16 +297,16 @@ int bch2_hash_set_snapshot(struct btree_trans *trans,
 	found = true;
 not_found:
 
-	if (!found && (flags & BCH_HASH_SET_MUST_REPLACE)) {
+	if (!found && (str_hash_flags & BCH_HASH_SET_MUST_REPLACE)) {
 		ret = -BCH_ERR_ENOENT_str_hash_set_must_replace;
-	} else if (found && (flags & BCH_HASH_SET_MUST_CREATE)) {
+	} else if (found && (str_hash_flags & BCH_HASH_SET_MUST_CREATE)) {
 		ret = -EEXIST;
 	} else {
 		if (!found && slot.path)
 			swap(iter, slot);
 
 		insert->k.p = iter.pos;
-		ret = bch2_trans_update(trans, &iter, insert, 0);
+		ret = bch2_trans_update(trans, &iter, insert, update_flags);
 	}
 
 	goto out;
@@ -307,7 +317,8 @@ int bch2_hash_set(struct btree_trans *trans,
 		  const struct bch_hash_desc desc,
 		  const struct bch_hash_info *info,
 		  subvol_inum inum,
-		  struct bkey_i *insert, int flags)
+		  struct bkey_i *insert,
+		  bch_str_hash_flags_t str_hash_flags)
 {
 	u32 snapshot;
 	int ret;
@@ -319,7 +330,7 @@ int bch2_hash_set(struct btree_trans *trans,
 	insert->k.p.inode = inum.inum;
 
 	return bch2_hash_set_snapshot(trans, desc, info, inum,
-				      snapshot, insert, flags, 0);
+				      snapshot, insert, str_hash_flags, 0);
 }
 
 static __always_inline