btrfs: move simple extent bit helpers out of extent_io.c

These are just variants and wrappers around the actual work horses of
the extent state.  Extract these out of extent_io.c.
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

fs/btrfs/extent-io-tree.c

@@ -142,6 +142,51 @@ void free_extent_state(struct extent_state *state)
 	}
 }
 
+/* Wrappers around set/clear extent bit */
+int set_record_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
+			   u32 bits, struct extent_changeset *changeset)
+{
+	/*
+	 * We don't support EXTENT_LOCKED yet, as current changeset will
+	 * record any bits changed, so for EXTENT_LOCKED case, it will
+	 * either fail with -EEXIST or changeset will record the whole
+	 * range.
+	 */
+	ASSERT(!(bits & EXTENT_LOCKED));
+
+	return set_extent_bit(tree, start, end, bits, 0, NULL, NULL, GFP_NOFS,
+			      changeset);
+}
+
+int clear_record_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
+			     u32 bits, struct extent_changeset *changeset)
+{
+	/*
+	 * Don't support EXTENT_LOCKED case, same reason as
+	 * set_record_extent_bits().
+	 */
+	ASSERT(!(bits & EXTENT_LOCKED));
+
+	return __clear_extent_bit(tree, start, end, bits, 0, 0, NULL, GFP_NOFS,
+				  changeset);
+}
+
+int try_lock_extent(struct extent_io_tree *tree, u64 start, u64 end)
+{
+	int err;
+	u64 failed_start;
+
+	err = set_extent_bit(tree, start, end, EXTENT_LOCKED, EXTENT_LOCKED,
+			     &failed_start, NULL, GFP_NOFS, NULL);
+	if (err == -EEXIST) {
+		if (failed_start > start)
+			clear_extent_bit(tree, start, failed_start - 1,
+					 EXTENT_LOCKED, 1, 0, NULL);
+		return 0;
+	}
+	return 1;
+}
+
 void __cold extent_state_free_cachep(void)
 {
 	btrfs_extent_state_leak_debug_check();

fs/btrfs/extent-io-tree.h

@@ -120,14 +120,19 @@ int test_range_bit(struct extent_io_tree *tree, u64 start, u64 end,
 		   u32 bits, int filled, struct extent_state *cached_state);
 int clear_record_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
 			     u32 bits, struct extent_changeset *changeset);
-int clear_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
-		     u32 bits, int wake, int delete,
-		     struct extent_state **cached);
 int __clear_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
 		     u32 bits, int wake, int delete,
 		     struct extent_state **cached, gfp_t mask,
 		     struct extent_changeset *changeset);
 
+static inline int clear_extent_bit(struct extent_io_tree *tree, u64 start,
+				   u64 end, u32 bits, int wake, int delete,
+				   struct extent_state **cached)
+{
+	return __clear_extent_bit(tree, start, end, bits, wake, delete,
+				  cached, GFP_NOFS, NULL);
+}
+
 static inline int unlock_extent(struct extent_io_tree *tree, u64 start, u64 end)
 {
 	return clear_extent_bit(tree, start, end, EXTENT_LOCKED, 1, 0, NULL);
@@ -164,8 +169,13 @@ int set_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
 		   u32 bits, unsigned exclusive_bits, u64 *failed_start,
 		   struct extent_state **cached_state, gfp_t mask,
 		   struct extent_changeset *changeset);
-int set_extent_bits_nowait(struct extent_io_tree *tree, u64 start, u64 end,
-			   u32 bits);
+
+static inline int set_extent_bits_nowait(struct extent_io_tree *tree, u64 start,
+					 u64 end, u32 bits)
+{
+	return set_extent_bit(tree, start, end, bits, 0, NULL, NULL,
+			      GFP_NOWAIT, NULL);
+}
 
 static inline int set_extent_bits(struct extent_io_tree *tree, u64 start,
 		u64 end, u32 bits)

fs/btrfs/extent_io.c

@@ -1283,50 +1283,6 @@ int convert_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
 	return err;
 }
 
-/* wrappers around set/clear extent bit */
-int set_record_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
-			   u32 bits, struct extent_changeset *changeset)
-{
-	/*
-	 * We don't support EXTENT_LOCKED yet, as current changeset will
-	 * record any bits changed, so for EXTENT_LOCKED case, it will
-	 * either fail with -EEXIST or changeset will record the whole
-	 * range.
-	 */
-	ASSERT(!(bits & EXTENT_LOCKED));
-
-	return set_extent_bit(tree, start, end, bits, 0, NULL, NULL, GFP_NOFS,
-			      changeset);
-}
-
-int set_extent_bits_nowait(struct extent_io_tree *tree, u64 start, u64 end,
-			   u32 bits)
-{
-	return set_extent_bit(tree, start, end, bits, 0, NULL, NULL,
-			      GFP_NOWAIT, NULL);
-}
-
-int clear_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
-		     u32 bits, int wake, int delete,
-		     struct extent_state **cached)
-{
-	return __clear_extent_bit(tree, start, end, bits, wake, delete,
-				  cached, GFP_NOFS, NULL);
-}
-
-int clear_record_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
-		u32 bits, struct extent_changeset *changeset)
-{
-	/*
-	 * Don't support EXTENT_LOCKED case, same reason as
-	 * set_record_extent_bits().
-	 */
-	ASSERT(!(bits & EXTENT_LOCKED));
-
-	return __clear_extent_bit(tree, start, end, bits, 0, 0, NULL, GFP_NOFS,
-				  changeset);
-}
-
 /*
  * either insert or lock state struct between start and end use mask to tell
  * us if waiting is desired.
@@ -1351,22 +1307,6 @@ int lock_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
 	return err;
 }
 
-int try_lock_extent(struct extent_io_tree *tree, u64 start, u64 end)
-{
-	int err;
-	u64 failed_start;
-
-	err = set_extent_bit(tree, start, end, EXTENT_LOCKED, EXTENT_LOCKED,
-			     &failed_start, NULL, GFP_NOFS, NULL);
-	if (err == -EEXIST) {
-		if (failed_start > start)
-			clear_extent_bit(tree, start, failed_start - 1,
-					 EXTENT_LOCKED, 1, 0, NULL);
-		return 0;
-	}
-	return 1;
-}
-
 void extent_range_clear_dirty_for_io(struct inode *inode, u64 start, u64 end)
 {
 	unsigned long index = start >> PAGE_SHIFT;