btrfs: pass the ino via truncate control

In the future we are going to want to truncate inode items without
needing to have an btrfs_inode to pass in, so add ino to the
btrfs_truncate_control and use that to look up the inode items to
truncate.
Reviewed-by: Filipe Manana <fdmanana@suse.com>
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/free-space-cache.c

@@ -293,6 +293,7 @@ int btrfs_truncate_free_space_cache(struct btrfs_trans_handle *trans,
 {
 	struct btrfs_truncate_control control = {
 		.new_size = 0,
+		.ino = btrfs_ino(BTRFS_I(vfs_inode)),
 		.min_type = BTRFS_EXTENT_DATA_KEY,
 		.clear_extent_range = true,
 	};

fs/btrfs/inode-item.c

@@ -458,7 +458,6 @@ int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
 	int pending_del_slot = 0;
 	int extent_type = -1;
 	int ret;
-	u64 ino = btrfs_ino(inode);
 	u64 bytes_deleted = 0;
 	bool be_nice = false;
 	bool should_throttle = false;
@@ -480,7 +479,7 @@ int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
 		return -ENOMEM;
 	path->reada = READA_BACK;
 
-	key.objectid = ino;
+	key.objectid = control->ino;
 	key.offset = (u64)-1;
 	key.type = (u8)-1;
 
@@ -516,7 +515,7 @@ int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
 		btrfs_item_key_to_cpu(leaf, &found_key, path->slots[0]);
 		found_type = found_key.type;
 
-		if (found_key.objectid != ino)
+		if (found_key.objectid != control->ino)
 			break;
 
 		if (found_type < control->min_type)
@@ -667,7 +666,7 @@ int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
 			btrfs_init_generic_ref(&ref, BTRFS_DROP_DELAYED_REF,
 					extent_start, extent_num_bytes, 0);
 			btrfs_init_data_ref(&ref, btrfs_header_owner(leaf),
-					ino, extent_offset,
+					control->ino, extent_offset,
 					root->root_key.objectid, false);
 			ret = btrfs_free_extent(trans, &ref);
 			if (ret) {

fs/btrfs/inode-item.h

@@ -32,6 +32,9 @@ struct btrfs_truncate_control {
 	/* OUT: the number of bytes to sub from this inode. */
 	u64 sub_bytes;
 
+	/* IN: the ino we are truncating. */
+	u64 ino;
+
 	/*
 	 * IN: minimum key type to remove.  All key types with this type are
 	 * removed only if their offset >= new_size.

fs/btrfs/inode.c

@@ -5252,6 +5252,7 @@ void btrfs_evict_inode(struct inode *inode)
 
 	while (1) {
 		struct btrfs_truncate_control control = {
+			.ino = btrfs_ino(BTRFS_I(inode)),
 			.new_size = 0,
 			.min_type = 0,
 		};
@@ -8533,6 +8534,7 @@ vm_fault_t btrfs_page_mkwrite(struct vm_fault *vmf)
 static int btrfs_truncate(struct inode *inode, bool skip_writeback)
 {
 	struct btrfs_truncate_control control = {
+		.ino = btrfs_ino(BTRFS_I(inode)),
 		.min_type = BTRFS_EXTENT_DATA_KEY,
 		.clear_extent_range = true,
 	};

fs/btrfs/tree-log.c

@@ -4100,6 +4100,7 @@ static int truncate_inode_items(struct btrfs_trans_handle *trans,
 {
 	struct btrfs_truncate_control control = {
 		.new_size = new_size,
+		.ino = btrfs_ino(inode),
 		.min_type = min_type,
 		.skip_ref_updates = true,
 	};