From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (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 E54403955CF for ; Wed, 15 Jul 2026 14:52:21 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.137.202.133 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784127143; cv=none; b=PQzmV4AXNQLq00cHJ8OTa1rEl2FWgZHpB2v1OSb7DDtXfU6prWSzqAzDAfd6AKGp5FGgRjCjjd0kHhNHzFnT45uQcNZF1XhZ2YoQ+IjABx4WgBHsBuRsBC3B4B2OKcOEaYcRi+by3QlSTPPo6xar+/p72Y/KVSpOpagZoPAq3nw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784127143; c=relaxed/simple; bh=2h8kkkn8ZPOfokquHwjttYYdIoAruG4gw+xsRVImCDY=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=oy+uvO6W/ymmj+6KtHwvVCtAxM47j+fm9JEJ74YW2Aun6di3L2hYdsHcTCajDRWkYF/uvMpiipoe5g21f4GVJTLqSUxNb2JUR6GSLt51w/u6H5x8wtd1pnsoq0rJW+bfNHtDtu72qmVyXzp/7YLMvCxrfHxftdyrhY44Nwu7K/I= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=lst.de; spf=none smtp.mailfrom=bombadil.srs.infradead.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b=LqZ6bz/6; arc=none smtp.client-ip=198.137.202.133 Authentication-Results: smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=lst.de Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=bombadil.srs.infradead.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="LqZ6bz/6" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20210309; h=Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:Cc:To:From:Sender :Reply-To:Content-Type:Content-ID:Content-Description; bh=8fT8pasRNrhLIwhoqmYODK9/mhejDC+I7fXBxjmWy+0=; b=LqZ6bz/6Jibw59cD2iqAQ8D1vQ akEhVpjvW3rU50HaynLB4veb9PgVWF3Tjohw2OuPTSTgMuSkqDGgfywOiEedpdubJHCV/YRye8v4R XSCEAsyORNQvm3Pj1bOQbjtwMgPIbytzw13yPVaW0O4K3kHGlQ3qXd+43EbHuFQEMiGsis9TvB3OJ qGwh1Q4Br9vuc7zYbwPmOCrVfZ8vzinIi1yYiiTWyjQ/MuHXQJuvLgUduBPWUvjsgmVgfVqGYRn0Z IAJw5VlVUE39jST+raCmHIEmwTT024J7xa0Pj64QOmmIbyCVmDS5Cuo17EH6HBd4rN6ax3bsQPKHg aoujZz0w==; Received: from 2a02-8389-2301-9f00-b29a-36e9-8c1c-0994.cable.dynamic.v6.surfer.at ([2a02:8389:2301:9f00:b29a:36e9:8c1c:994] helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.99.1 #2 (Red Hat Linux)) id 1wk0yD-0000000FDY8-0jRL; Wed, 15 Jul 2026 14:52:21 +0000 From: Christoph Hellwig To: Carlos Maiolino Cc: "Darrick J. Wong" , linux-xfs@vger.kernel.org Subject: [PATCH 10/12] xfs: merge xfs_buf_reverify into xfs_buf_read_map Date: Wed, 15 Jul 2026 16:51:03 +0200 Message-ID: <20260715145147.95654-11-hch@lst.de> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260715145147.95654-1-hch@lst.de> References: <20260715145147.95654-1-hch@lst.de> Precedence: bulk X-Mailing-List: linux-xfs@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html xfs_buf_read_map is the only caller of xfs_buf_reverify that is left. Merge it into that so that the comments can be moved closer to the logic, and redundant asserts can be removed. Signed-off-by: Christoph Hellwig --- fs/xfs/xfs_buf.c | 79 ++++++++++++++++++++++-------------------------- 1 file changed, 36 insertions(+), 43 deletions(-) diff --git a/fs/xfs/xfs_buf.c b/fs/xfs/xfs_buf.c index 21c21491d72e..be3b25ccbea6 100644 --- a/fs/xfs/xfs_buf.c +++ b/fs/xfs/xfs_buf.c @@ -626,41 +626,6 @@ _xfs_buf_read( return xfs_buf_iowait(bp); } -/* - * Reverify a buffer found in cache without an attached ->b_ops. - * - * If the caller passed an ops structure and the buffer doesn't have ops - * assigned, set the ops and use it to verify the contents. If verification - * fails, clear XBF_DONE. We assume the buffer has no recorded errors and is - * already in XBF_DONE state on entry. - * - * Under normal operations, every in-core buffer is verified on read I/O - * completion. There are two scenarios that can lead to in-core buffers without - * an assigned ->b_ops. The first is during log recovery of buffers on a V4 - * filesystem, though these buffers are purged at the end of recovery. The - * other is online repair, which intentionally reads with a NULL buffer ops to - * run several verifiers across an in-core buffer in order to establish buffer - * type. If repair can't establish that, the buffer will be left in memory - * with NULL buffer ops. - */ -static int -xfs_buf_reverify( - struct xfs_buf *bp, - const struct xfs_buf_ops *ops) -{ - ASSERT(bp->b_flags & XBF_DONE); - ASSERT(bp->b_error == 0); - - if (!ops || bp->b_ops) - return 0; - - bp->b_ops = ops; - bp->b_ops->verify_read(bp); - if (bp->b_error) - xfs_buf_clear_flags(bp, XBF_DONE); - return bp->b_error; -} - int xfs_buf_read_map( struct xfs_buftarg *target, @@ -685,18 +650,46 @@ xfs_buf_read_map( trace_xfs_buf_read(bp, flags, _RET_IP_); - if (!(bp->b_flags & XBF_DONE)) { + if (bp->b_flags & XBF_DONE) { + ASSERT(bp->b_error == 0); + + /* + * If the caller passed an ops structure and the buffer doesn't + * have ops assigned yet, set the ops and use them to verify the + * buffer contents. + * + * Under normal operations, every in-core buffer is verified on + * read I/O completion, but there are two scenarios that can + * lead to in-core buffers without an assigned ->b_ops: + * + * 1) During log recovery of buffers on a V4 filesystem. + * These buffers are purged at the end of recovery, though. + * 2) Oonline repair intentionally reads with a NULL buffer + * ops to run several verifiers across an in-core buffer in + * order to establish buffer type. If repair can't + * establish that, the buffer will be left in memory with + * NULL buffer ops. + */ + if (ops && !bp->b_ops) { + bp->b_ops = ops; + bp->b_ops->verify_read(bp); + /* + * If verification failed, clear XBF_DONE as we assume + * that buffers have no recorded errors when in XBF_DONE + * state. + */ + error = bp->b_error; + if (error) + xfs_buf_clear_flags(bp, XBF_DONE); + } + + /* We do not want read in the flags */ + xfs_buf_clear_flags(bp, XBF_READ); + } else { /* Initiate the buffer read and wait. */ XFS_STATS_INC(target->bt_mount, xb_get_read); bp->b_ops = ops; error = _xfs_buf_read(bp); - } else { - /* Buffer already read; all we need to do is check it. */ - error = xfs_buf_reverify(bp, ops); - - /* We do not want read in the flags */ - xfs_buf_clear_flags(bp, XBF_READ); - ASSERT(bp->b_ops != NULL || ops == NULL); } if (error) -- 2.53.0