From patchwork Thu Dec 12 20:29:41 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Roger L. Beckermeyer III" X-Patchwork-Id: 13905953 Received: from mail-io1-f49.google.com (mail-io1-f49.google.com [209.85.166.49]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 88AED1A4F22 for ; Thu, 12 Dec 2024 20:31:21 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.49 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1734035483; cv=none; b=alPnqQlFYG6oVfTlVN8zN0tbEZDjAIfhLaZ4IuCxGaUKJU92vdHdMpHNHzKT/+1v28zfyOSeOSTRbDG1iwfSpxNLveNC2FSwEXgA1igik6HQZ/4ZdjJD8y5G3znm831gZDdryTfFCe8x5WkCPOtcELEOdvmbvSO40A1cC7TMNxo= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1734035483; c=relaxed/simple; bh=TkliS2oHaEPuWNgijaqqLxdRvx2GTLjFdwEnagsLDSE=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=bOtUVVOCpcmPU5z0UkjbiFdRtt4wx3fGg6Kv++xzF4kViuQd+z7Vm0+FOStyMlCVqq+RCVDl/i2FJdwzRg2ThhFXZtctJ3NlNe4asL3wLZm4Wve4IUk4If+J5FkJBQsG5iXC19atbQTqtFxTdizoYiAzNecBw1RGc8HYUuPrhJA= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=l8MHt1m7; arc=none smtp.client-ip=209.85.166.49 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="l8MHt1m7" Received: by mail-io1-f49.google.com with SMTP id ca18e2360f4ac-844dac0a8f4so77099839f.2 for ; Thu, 12 Dec 2024 12:31:21 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1734035480; x=1734640280; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=JrKhWXGN+megD4dCMPT4CbRdmotjLJaXyZVNcNebOxM=; b=l8MHt1m7FBaTvqWbE5Gaxw/BM48s4c6iPczuLBDVSu14WfLlPG+g6toKI72hR039Gy nhBMz03dkNmwAaw7jUfetCx8ZZWKAdXOvCXYSCwG7J8ymZ/cjPDrbCj3FFpTssqvLCig jH7IpnuxCGYjRIDLEeXoshge4PphbLn+WEffJbkvvsBJVtN6y//mbFL/e6rqIMGY6U+w QCSfLQv2RN3+J6zJP6sXlJIfViGSsOkDoGvMJC5IcqdB11EQKe1CMwPyOsu+pKJNMsq0 ozXZIxvsBGLUJ+//GgOKbSQbbdspip1F9a3gGLz+8PdGg1qTgUuU2/BXUfNrSeAqyOG+ TwQg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1734035480; x=1734640280; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=JrKhWXGN+megD4dCMPT4CbRdmotjLJaXyZVNcNebOxM=; b=KhpdWnZAvATBYendmU4b70NcG5Q+NxGhtI5Pp6OJGC5UkmsEYOM4s21IOYxNmU470w rWKI8CoSF1e++DUhq+dobupGPCtkqi17ZwZm9nCS0BpuZHZpyY37UYh2JuIORfwqn5i+ aS+sWoZNOi40EMmYMSaBQm9wJXgMtDB46rxh1mXG3A1tBh5pIiUvIf9fCdtht+Z4n3FN Rq0CBWTOw7jrgq5eMnSYCoyZGjnbemPPGr3dTDmCuvPydTg+ymAzbyFWZmgl74kPl+DS zGFJoz9p1B7MJ9LumnC6qADEGhlHi/ugHBnkBhIYWNOLc5vsmHS75DM8EGAwmymMSGw+ GCSA== X-Gm-Message-State: AOJu0YyirjMqurwKAlQGfp3+vrZrllYAw9xqmKWmW1S9fW1SUHk5nF6D h86IsiJwqmNKfDNSzMK+eCNQnFRI1fDBszt0mJqmv1mXZt9T3ZRthh04oM0sMVc= X-Gm-Gg: ASbGnct/8h2QzIAs3zrhM6W4BCvEkQ5JGAAQjOvzbhMvFjq/iu1yBa1AA/X8GEHFzoq qpvbdRuftMgTWWTpUyAkIKrwcxM2Eo4vbdjhIeQuakxSgT7VWZYxGRJJMpVjnHyKRfzXxZa7Gq3 FbskB5HRi0ZwpM6SkqH+Pr42bO2hnEeDTeC5lLVgJgmkXz+YVR2PAM8m0qnoydczqjffTpFwxas TZoatgC6AyYpbKWsPQwjxPb7cqi+unIg84fVCgC6tm6Gs9h2Pm15YHYU9s41Bhgjg== X-Google-Smtp-Source: AGHT+IE/m51xUGZKgbn0xoOshOGUZ49Munvd8q9jF1pXylVDG9zR+2h8wsw6F5mbnrvz9tIqp0C9rA== X-Received: by 2002:a05:6602:492:b0:835:3ffe:fe31 with SMTP id ca18e2360f4ac-844e88489f9mr26385539f.8.1734035480500; Thu, 12 Dec 2024 12:31:20 -0800 (PST) Received: from LeeDev.lee.dev ([2600:8804:1a84:2a00:be24:11ff:fe2b:2474]) by smtp.gmail.com with ESMTPSA id ca18e2360f4ac-844e29b6103sm28642939f.29.2024.12.12.12.31.18 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 12 Dec 2024 12:31:19 -0800 (PST) From: "Roger L. Beckermeyer III" To: beckerlee3@gmail.com Cc: linux-btrfs@vger.kernel.org Subject: [PATCH 3/6] btrfs: update prelim_ref_insert() to use rb helpers Date: Thu, 12 Dec 2024 14:29:41 -0600 Message-ID: <2e60a302945ddaa69abb807987fea9bcdcc36ef0.1734033142.git.beckerlee3@gmail.com> X-Mailer: git-send-email 2.45.2 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-btrfs@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 update prelim_ref_insert() to use rb_find_add_cached() adds prelim_ref_cmp for use with rb_find_add_cached() Signed-off-by: Roger L. Beckermeyer III --- fs/btrfs/backref.c | 71 +++++++++++++++++++++++----------------------- 1 file changed, 36 insertions(+), 35 deletions(-) diff --git a/fs/btrfs/backref.c b/fs/btrfs/backref.c index 6d9f39c1d89c..fcbcfce0f93a 100644 --- a/fs/btrfs/backref.c +++ b/fs/btrfs/backref.c @@ -250,6 +250,17 @@ static int prelim_ref_compare(const struct prelim_ref *ref1, return 0; } +static int prelim_ref_cmp(struct rb_node *node, const struct rb_node *exist) +{ + int result; + struct prelim_ref *ref1 = rb_entry(node, struct prelim_ref, rbnode); + struct prelim_ref *ref2 = rb_entry(exist, struct prelim_ref, rbnode); + + result = prelim_ref_compare(ref1, ref2); + + return result; +} + static void update_share_count(struct share_check *sc, int oldcount, int newcount, const struct prelim_ref *newref) { @@ -281,52 +292,42 @@ static void prelim_ref_insert(const struct btrfs_fs_info *fs_info, struct rb_node **p; struct rb_node *parent = NULL; struct prelim_ref *ref; - int result; - bool leftmost = true; + struct rb_node *exist; root = &preftree->root; p = &root->rb_root.rb_node; + parent = *p; + ref = rb_entry(parent, struct prelim_ref, rbnode); - while (*p) { - parent = *p; - ref = rb_entry(parent, struct prelim_ref, rbnode); - result = prelim_ref_compare(ref, newref); - if (result < 0) { - p = &(*p)->rb_left; - } else if (result > 0) { - p = &(*p)->rb_right; - leftmost = false; - } else { - /* Identical refs, merge them and free @newref */ - struct extent_inode_elem *eie = ref->inode_list; + exist = rb_find_add_cached(&newref->rbnode, root, prelim_ref_cmp); + if (exist != NULL) { + /* Identical refs, merge them and free @newref */ + struct extent_inode_elem *eie = ref->inode_list; - while (eie && eie->next) - eie = eie->next; + while (eie && eie->next) + eie = eie->next; - if (!eie) - ref->inode_list = newref->inode_list; - else - eie->next = newref->inode_list; - trace_btrfs_prelim_ref_merge(fs_info, ref, newref, - preftree->count); - /* - * A delayed ref can have newref->count < 0. - * The ref->count is updated to follow any - * BTRFS_[ADD|DROP]_DELAYED_REF actions. - */ - update_share_count(sc, ref->count, - ref->count + newref->count, newref); - ref->count += newref->count; - free_pref(newref); - return; - } + if (!eie) + ref->inode_list = newref->inode_list; + else + eie->next = newref->inode_list; + trace_btrfs_prelim_ref_merge(fs_info, ref, newref, + preftree->count); + /* + * A delayed ref can have newref->count < 0. + * The ref->count is updated to follow any + * BTRFS_[ADD|DROP]_DELAYED_REF actions. + */ + update_share_count(sc, ref->count, + ref->count + newref->count, newref); + ref->count += newref->count; + free_pref(newref); + return; } update_share_count(sc, 0, newref->count, newref); preftree->count++; trace_btrfs_prelim_ref_insert(fs_info, newref, NULL, preftree->count); - rb_link_node(&newref->rbnode, parent, p); - rb_insert_color_cached(&newref->rbnode, root, leftmost); } /*