From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E781A13B59A; Mon, 6 Jan 2025 15:55:47 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1736178948; cv=none; b=ikT1t6w09xbKHh/33LgO7QXTkW3cD4ExlsQxAYhwtGWNKXL+dNd02K29vz7IVWQ+Y4yZ4ZPf9J6xEnV5u5QPQZyE04M1QYdw7NalrbtmhuSAInEnTu75iIf2R17Y4iiAelzsouGxQfXWMzsMY/vqBg4+N5UEMTdnGn8nTaHaWEk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1736178948; c=relaxed/simple; bh=cDrnrY5ZItaFZ+Z19TLw3orhUN77RboH/VXBFfyTDM0=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=KuiUx7PYZNAf+6UpcuEWWhXIJRzpPOawzVmTkXMbHbf/In6nyoQXGpN/W8hphT1MPFgoV9HrzSlYt31KCJ/7gXEE8sC2UwSHbiawSZDymYbOnNlTcfm+tJBKRvquDeMf7evO957ouu1ziQ3FQirFnkArU8vMYo2zUB+xbzp9+XY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=ATbEXRuZ; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="ATbEXRuZ" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 518D3C4CED2; Mon, 6 Jan 2025 15:55:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1736178947; bh=cDrnrY5ZItaFZ+Z19TLw3orhUN77RboH/VXBFfyTDM0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ATbEXRuZjAYL12CWv+43R7EpoSC1T1bBz619IS2ameYybXeKCkWzfEZ+wAJJg+BV+ BvdAjpltWDp9LWFwHOAksB1fnmjfe5whyJwqXYg7XLLx0HpSW2ywTlpaO45O9anSEK EZOaNs4TNMKhOyAjPSFdBpBz2m71IThbyEh9wCGk= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Filipe Manana , David Sterba , Sasha Levin Subject: [PATCH 5.15 145/168] btrfs: rename and export __btrfs_cow_block() Date: Mon, 6 Jan 2025 16:17:33 +0100 Message-ID: <20250106151143.913139524@linuxfoundation.org> X-Mailer: git-send-email 2.47.1 In-Reply-To: <20250106151138.451846855@linuxfoundation.org> References: <20250106151138.451846855@linuxfoundation.org> User-Agent: quilt/0.68 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Filipe Manana [ Upstream commit 95f93bc4cbcac6121a5ee85cd5019ee8e7447e0b ] Rename and export __btrfs_cow_block() as btrfs_force_cow_block(). This is to allow to move defrag specific code out of ctree.c and into defrag.c in one of the next patches. Signed-off-by: Filipe Manana Reviewed-by: David Sterba Signed-off-by: David Sterba Stable-dep-of: 44f52bbe96df ("btrfs: fix use-after-free when COWing tree bock and tracing is enabled") Signed-off-by: Sasha Levin --- fs/btrfs/ctree.c | 30 +++++++++++++++--------------- fs/btrfs/ctree.h | 7 +++++++ 2 files changed, 22 insertions(+), 15 deletions(-) diff --git a/fs/btrfs/ctree.c b/fs/btrfs/ctree.c index 345f205af619..42562c61f52e 100644 --- a/fs/btrfs/ctree.c +++ b/fs/btrfs/ctree.c @@ -386,13 +386,13 @@ static noinline int update_ref_for_cow(struct btrfs_trans_handle *trans, * bytes the allocator should try to find free next to the block it returns. * This is just a hint and may be ignored by the allocator. */ -static noinline int __btrfs_cow_block(struct btrfs_trans_handle *trans, - struct btrfs_root *root, - struct extent_buffer *buf, - struct extent_buffer *parent, int parent_slot, - struct extent_buffer **cow_ret, - u64 search_start, u64 empty_size, - enum btrfs_lock_nesting nest) +int btrfs_force_cow_block(struct btrfs_trans_handle *trans, + struct btrfs_root *root, + struct extent_buffer *buf, + struct extent_buffer *parent, int parent_slot, + struct extent_buffer **cow_ret, + u64 search_start, u64 empty_size, + enum btrfs_lock_nesting nest) { struct btrfs_fs_info *fs_info = root->fs_info; struct btrfs_disk_key disk_key; @@ -541,7 +541,7 @@ static inline int should_cow_block(struct btrfs_trans_handle *trans, } /* - * cows a single block, see __btrfs_cow_block for the real work. + * COWs a single block, see btrfs_force_cow_block() for the real work. * This version of it has extra checks so that a block isn't COWed more than * once per transaction, as long as it hasn't been written yet */ @@ -594,8 +594,8 @@ noinline int btrfs_cow_block(struct btrfs_trans_handle *trans, * Also We don't care about the error, as it's handled internally. */ btrfs_qgroup_trace_subtree_after_cow(trans, root, buf); - ret = __btrfs_cow_block(trans, root, buf, parent, - parent_slot, cow_ret, search_start, 0, nest); + ret = btrfs_force_cow_block(trans, root, buf, parent, parent_slot, + cow_ret, search_start, 0, nest); trace_btrfs_cow_block(root, buf, *cow_ret); @@ -746,11 +746,11 @@ int btrfs_realloc_node(struct btrfs_trans_handle *trans, search_start = last_block; btrfs_tree_lock(cur); - err = __btrfs_cow_block(trans, root, cur, parent, i, - &cur, search_start, - min(16 * blocksize, - (end_slot - i) * blocksize), - BTRFS_NESTING_COW); + err = btrfs_force_cow_block(trans, root, cur, parent, i, + &cur, search_start, + min(16 * blocksize, + (end_slot - i) * blocksize), + BTRFS_NESTING_COW); if (err) { btrfs_tree_unlock(cur); free_extent_buffer(cur); diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h index 17ebcf19b444..61ec4ba5414d 100644 --- a/fs/btrfs/ctree.h +++ b/fs/btrfs/ctree.h @@ -2885,6 +2885,13 @@ int btrfs_cow_block(struct btrfs_trans_handle *trans, struct extent_buffer *parent, int parent_slot, struct extent_buffer **cow_ret, enum btrfs_lock_nesting nest); +int btrfs_force_cow_block(struct btrfs_trans_handle *trans, + struct btrfs_root *root, + struct extent_buffer *buf, + struct extent_buffer *parent, int parent_slot, + struct extent_buffer **cow_ret, + u64 search_start, u64 empty_size, + enum btrfs_lock_nesting nest); int btrfs_copy_root(struct btrfs_trans_handle *trans, struct btrfs_root *root, struct extent_buffer *buf, -- 2.39.5