From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pf1-f174.google.com (mail-pf1-f174.google.com [209.85.210.174]) (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 A2A17166F1A for ; Tue, 23 Sep 2025 00:33:54 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.174 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1758587638; cv=none; b=LXvO+B0vfWrmJ74VlaxwtoXLsQdyHFllukLRT1VZkvYatmH7omYJJAT6waszv9LaZHa0vflS9fIYTWJEEhkxq9BIIAmJYQubhdUh452Ou4eOYLs3HXb/Is+lf7lAo8vbwrcyi7T4FQAVbwJYVq6rpwrcPLziWZXCtMcFjSOTIyo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1758587638; c=relaxed/simple; bh=CSiGtKrWb8zqpNUe8yL7Pevqy9qFJhFmaY58ZJGrYSc=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=tRQ+WsB4/gCvQ9e1UJ3mP2SUZMbFwNjs66rfqUhQNASp+ytHqH3i2gNzPhzo/lYmMNBaiGtwHp4qyakVyGtNCaAE6OwRPMRnMuy5lwKkZwmi9UO28abj/MP9yV3ukBx4EOQmqUVtMR68aJ4yX8mePINo9PPCgZ5TvVnSMzz3h4Y= 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=XzYHos0j; arc=none smtp.client-ip=209.85.210.174 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="XzYHos0j" Received: by mail-pf1-f174.google.com with SMTP id d2e1a72fcca58-77f2e960728so2283304b3a.2 for ; Mon, 22 Sep 2025 17:33:54 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1758587634; x=1759192434; 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=L8Zc1MP+97msutqoeYloSdkN6RJEwl1bHJXdXkLR+a8=; b=XzYHos0jTd0Cc+zCh4if+nFQs5Qe9MqaHzNgescPY6ANwnsfhs/BsI8D2MAbDOHTgU 4teujGeqxpxArLOapynGfV3o0DVDb/BFjNNn/dT42chj0cHr3ncU6UpDQ0qgDAYuG3rm ypTEPCYI64jouXY71ZkM4fPSnW+KyL2inDzlbkkJQdrmjylLK0/ayvtQPlX/ErjBC73K uTa6ewd50dW5aGpTp96GHnb/T9fETG1zbpGvk1cSvphV12THa563vKzXWuW4pwrC3CLX 897Sb9RYlEoPFYtWN3yxJ+0JTShC2H6JTvW64TldOz7RQFZorvEuJeT4h/kJsbbgaNzF HAXQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1758587634; x=1759192434; 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=L8Zc1MP+97msutqoeYloSdkN6RJEwl1bHJXdXkLR+a8=; b=XGS8rJk7rCmlwb5aRjKgaQGfIE8z+CSzA3BYZygb1Fe4k5YuIQH7Szlp+357nl8ktH 8EF3u2GmBnXa6XLikZzCWn873cGV9V7oAvVXqGyaiSax8pYaXWh9S6exoSWFHXH6p5l/ OCWR4uNyV9GmWC/7Ogl0DTpFbFSuLZYo7FAsRMU/PwClLTi2JPs4XCyUNsNhhEwBCEq1 SRWpdxtLFEMTaUyP3e6rmiLu8DfXvO3WTzm4ZAZ61n4B1qzvwSRzbw2orLrbW3SMdPOe eFbwA0CjWJX32mIbD9Xv+AngglTGgMii1iYjV4Z+uJ85wRcC9Pxz/8BNFFd3qR+Vc/Nm V7Bw== X-Forwarded-Encrypted: i=1; AJvYcCXB3SRh835rxURNFlCY/afUY/JQIK4rJW1cMKTuIFwJBo7BWZ/kb8HH3zdy63YhEZe8fQQeCsqZTWZF+Q==@vger.kernel.org X-Gm-Message-State: AOJu0Yx2cpYryPCSJDhTqrLaFKYYepoowu5ylPPEe/6oL2M4Srh1ZP/U S/5qMGNo4ASIyRRghQBMRf5J4UltJv992f5R9qtUyIGjGzIkiiSyB9sa X-Gm-Gg: ASbGncu+eV4VbnE8GYVPLag7yldESnZBhlaZROd/h4WntatxDRQP47IGsKn8P6gS684 RIqeE5jEe1m2aBcPBXYo8iyzLXV8iA7NY7SnfgzR9CuLyEPgHQrI0GtJq73obBPadHg2BiIkyk1 oKARZzpPeWu6kpBFmf8SJxpxeM01plzju8MRo7+qeidskrrJsWEulA5WVqsEn6Xzr2ms8zjNCqJ btZJNC8xr3HgSu1dmLJqkp9QGLweBugF6rUv+akVxVPPdT+hQLRQWsX85cZn9DsWi+rKEVQmBU2 Q0c1CzAI/d5TjkS7ZJkB7yVyfJvWfSegUCbQTwDhn9r/DNMWKTJZFwGZd4uxpaP/mzURLpUvv4W hfKyOG5VDaRxTjqE6/US9isnNZEehTtOAUPnS1AaLLJLu5Q== X-Google-Smtp-Source: AGHT+IE9UTk9DOOxHIk7V9AusMOVMJaA+o0ouKvy94Kuhd+S63mgnV20FB06J29O2ckAhaW6BtwlSg== X-Received: by 2002:a05:6a20:258b:b0:262:c083:bb38 with SMTP id adf61e73a8af0-2cfbb09d4e3mr1348063637.0.1758587633950; Mon, 22 Sep 2025 17:33:53 -0700 (PDT) Received: from localhost ([2a03:2880:ff::]) by smtp.gmail.com with ESMTPSA id 41be03b00d2f7-b54ff445dd7sm12934627a12.51.2025.09.22.17.33.53 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 22 Sep 2025 17:33:53 -0700 (PDT) From: Joanne Koong To: brauner@kernel.org, miklos@szeredi.hu Cc: djwong@kernel.org, hch@infradead.org, linux-block@vger.kernel.org, gfs2@lists.linux.dev, linux-fsdevel@vger.kernel.org, linux-xfs@vger.kernel.org, linux-doc@vger.kernel.org, hsiangkao@linux.alibaba.com, kernel-team@meta.com Subject: [PATCH v4 01/15] iomap: move bio read logic into helper function Date: Mon, 22 Sep 2025 17:23:39 -0700 Message-ID: <20250923002353.2961514-2-joannelkoong@gmail.com> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20250923002353.2961514-1-joannelkoong@gmail.com> References: <20250923002353.2961514-1-joannelkoong@gmail.com> Precedence: bulk X-Mailing-List: linux-block@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Move the iomap_readpage_iter() bio read logic into a separate helper function, iomap_bio_read_folio_range(). This is needed to make iomap read/readahead more generically usable, especially for filesystems that do not require CONFIG_BLOCK. Additionally rename buffered write's iomap_read_folio_range() function to iomap_bio_read_folio_range_sync() to better describe its synchronous behavior. Signed-off-by: Joanne Koong Reviewed-by: "Darrick J. Wong" --- fs/iomap/buffered-io.c | 68 ++++++++++++++++++++++++------------------ 1 file changed, 39 insertions(+), 29 deletions(-) diff --git a/fs/iomap/buffered-io.c b/fs/iomap/buffered-io.c index 9535733ed07a..7e65075b6345 100644 --- a/fs/iomap/buffered-io.c +++ b/fs/iomap/buffered-io.c @@ -367,36 +367,15 @@ struct iomap_readpage_ctx { struct readahead_control *rac; }; -static int iomap_readpage_iter(struct iomap_iter *iter, - struct iomap_readpage_ctx *ctx) +static void iomap_bio_read_folio_range(const struct iomap_iter *iter, + struct iomap_readpage_ctx *ctx, loff_t pos, size_t plen) { + struct folio *folio = ctx->cur_folio; const struct iomap *iomap = &iter->iomap; - loff_t pos = iter->pos; + struct iomap_folio_state *ifs = folio->private; + size_t poff = offset_in_folio(folio, pos); loff_t length = iomap_length(iter); - struct folio *folio = ctx->cur_folio; - struct iomap_folio_state *ifs; - size_t poff, plen; sector_t sector; - int ret; - - if (iomap->type == IOMAP_INLINE) { - ret = iomap_read_inline_data(iter, folio); - if (ret) - return ret; - return iomap_iter_advance(iter, length); - } - - /* zero post-eof blocks as the page may be mapped */ - ifs = ifs_alloc(iter->inode, folio, iter->flags); - iomap_adjust_read_range(iter->inode, folio, &pos, length, &poff, &plen); - if (plen == 0) - goto done; - - if (iomap_block_needs_zeroing(iter, pos)) { - folio_zero_range(folio, poff, plen); - iomap_set_range_uptodate(folio, poff, plen); - goto done; - } ctx->cur_folio_in_bio = true; if (ifs) { @@ -435,6 +414,37 @@ static int iomap_readpage_iter(struct iomap_iter *iter, ctx->bio->bi_end_io = iomap_read_end_io; bio_add_folio_nofail(ctx->bio, folio, plen, poff); } +} + +static int iomap_readpage_iter(struct iomap_iter *iter, + struct iomap_readpage_ctx *ctx) +{ + const struct iomap *iomap = &iter->iomap; + loff_t pos = iter->pos; + loff_t length = iomap_length(iter); + struct folio *folio = ctx->cur_folio; + size_t poff, plen; + int ret; + + if (iomap->type == IOMAP_INLINE) { + ret = iomap_read_inline_data(iter, folio); + if (ret) + return ret; + return iomap_iter_advance(iter, length); + } + + /* zero post-eof blocks as the page may be mapped */ + ifs_alloc(iter->inode, folio, iter->flags); + iomap_adjust_read_range(iter->inode, folio, &pos, length, &poff, &plen); + if (plen == 0) + goto done; + + if (iomap_block_needs_zeroing(iter, pos)) { + folio_zero_range(folio, poff, plen); + iomap_set_range_uptodate(folio, poff, plen); + } else { + iomap_bio_read_folio_range(iter, ctx, pos, plen); + } done: /* @@ -559,7 +569,7 @@ void iomap_readahead(struct readahead_control *rac, const struct iomap_ops *ops) } EXPORT_SYMBOL_GPL(iomap_readahead); -static int iomap_read_folio_range(const struct iomap_iter *iter, +static int iomap_bio_read_folio_range_sync(const struct iomap_iter *iter, struct folio *folio, loff_t pos, size_t len) { const struct iomap *srcmap = iomap_iter_srcmap(iter); @@ -572,7 +582,7 @@ static int iomap_read_folio_range(const struct iomap_iter *iter, return submit_bio_wait(&bio); } #else -static int iomap_read_folio_range(const struct iomap_iter *iter, +static int iomap_bio_read_folio_range_sync(const struct iomap_iter *iter, struct folio *folio, loff_t pos, size_t len) { WARN_ON_ONCE(1); @@ -749,7 +759,7 @@ static int __iomap_write_begin(const struct iomap_iter *iter, status = write_ops->read_folio_range(iter, folio, block_start, plen); else - status = iomap_read_folio_range(iter, + status = iomap_bio_read_folio_range_sync(iter, folio, block_start, plen); if (status) return status; -- 2.47.3