From patchwork Mon Jul 19 10:35:08 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 12385389 Received: from casper.infradead.org (casper.infradead.org [90.155.50.34]) (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 C96D629D6 for ; Mon, 19 Jul 2021 10:55:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; 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=m9b6YNvsLzNONFanU6RhGrYZvY35bdAagUM7E3HgPsI=; b=gEUKuZbjt+vU0RQu8s9073ap4j NNRR7FIhYroNchlSSqvjyiB268ziPIHD+HIr7QSHYD7c8EjRWBohoV/BvRR7b7URxptiG9vHXgOYK EN5llbMPIYB3FXuRE+qgDILxPq7ghwvzqHGIJ+tCmGp/W5cAr9F5EL242VshTP+pPdHJnt2H2NDtF tgGmT91REdRNFNitRGj8wNp4t75ePyX+s+/sXQXJ8aGKjLxWzLJJxLqh3fEFN/QGA3SMZdr+XRUY9 1QlV6LGS6KyUNu25YWgHJeLGUCI0o4k96uS0bIg32sQ0ZatCEYPHwZzdkktHBfP/X+8jrO0EOFkPD JaR43xZw==; Received: from [2001:4bb8:193:7660:d2a4:8d57:2e55:21d0] (helo=localhost) by casper.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1m5QtE-006lnQ-LS; Mon, 19 Jul 2021 10:53:08 +0000 From: Christoph Hellwig To: "Darrick J. Wong" Cc: Dan Williams , Matthew Wilcox , Andreas Gruenbacher , Shiyang Ruan , linux-xfs@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-btrfs@vger.kernel.org, nvdimm@lists.linux.dev, cluster-devel@redhat.com Subject: [PATCH 15/27] iomap: switch iomap_fiemap to use iomap_iter Date: Mon, 19 Jul 2021 12:35:08 +0200 Message-Id: <20210719103520.495450-16-hch@lst.de> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210719103520.495450-1-hch@lst.de> References: <20210719103520.495450-1-hch@lst.de> Precedence: bulk X-Mailing-List: nvdimm@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by casper.infradead.org. See http://www.infradead.org/rpr.html Rewrite the ->fiemap implementation based on iomap_iter. Signed-off-by: Christoph Hellwig --- fs/iomap/fiemap.c | 70 ++++++++++++++++++++--------------------------- 1 file changed, 29 insertions(+), 41 deletions(-) diff --git a/fs/iomap/fiemap.c b/fs/iomap/fiemap.c index aab070df4a2175..acad09a8c188df 100644 --- a/fs/iomap/fiemap.c +++ b/fs/iomap/fiemap.c @@ -1,6 +1,6 @@ // SPDX-License-Identifier: GPL-2.0 /* - * Copyright (c) 2016-2018 Christoph Hellwig. + * Copyright (c) 2016-2021 Christoph Hellwig. */ #include #include @@ -8,13 +8,8 @@ #include #include -struct fiemap_ctx { - struct fiemap_extent_info *fi; - struct iomap prev; -}; - static int iomap_to_fiemap(struct fiemap_extent_info *fi, - struct iomap *iomap, u32 flags) + const struct iomap *iomap, u32 flags) { switch (iomap->type) { case IOMAP_HOLE: @@ -43,24 +38,22 @@ static int iomap_to_fiemap(struct fiemap_extent_info *fi, iomap->length, flags); } -static loff_t -iomap_fiemap_actor(struct inode *inode, loff_t pos, loff_t length, void *data, - struct iomap *iomap, struct iomap *srcmap) +static loff_t iomap_fiemap_iter(const struct iomap_iter *iter, + struct fiemap_extent_info *fi, struct iomap *prev) { - struct fiemap_ctx *ctx = data; - loff_t ret = length; + int ret; - if (iomap->type == IOMAP_HOLE) - return length; + if (iter->iomap.type == IOMAP_HOLE) + return iomap_length(iter); - ret = iomap_to_fiemap(ctx->fi, &ctx->prev, 0); - ctx->prev = *iomap; + ret = iomap_to_fiemap(fi, prev, 0); + *prev = iter->iomap; switch (ret) { case 0: /* success */ - return length; + return iomap_length(iter); case 1: /* extent array full */ return 0; - default: + default: /* error */ return ret; } } @@ -68,38 +61,33 @@ iomap_fiemap_actor(struct inode *inode, loff_t pos, loff_t length, void *data, int iomap_fiemap(struct inode *inode, struct fiemap_extent_info *fi, u64 start, u64 len, const struct iomap_ops *ops) { - struct fiemap_ctx ctx; - loff_t ret; - - memset(&ctx, 0, sizeof(ctx)); - ctx.fi = fi; - ctx.prev.type = IOMAP_HOLE; + struct iomap_iter iter = { + .inode = inode, + .pos = start, + .len = len, + .flags = IOMAP_REPORT, + }; + struct iomap prev = { + .type = IOMAP_HOLE, + }; + int ret; - ret = fiemap_prep(inode, fi, start, &len, 0); + ret = fiemap_prep(inode, fi, start, &iter.len, 0); if (ret) return ret; - while (len > 0) { - ret = iomap_apply(inode, start, len, IOMAP_REPORT, ops, &ctx, - iomap_fiemap_actor); - /* inode with no (attribute) mapping will give ENOENT */ - if (ret == -ENOENT) - break; - if (ret < 0) - return ret; - if (ret == 0) - break; + while ((ret = iomap_iter(&iter, ops)) > 0) + iter.processed = iomap_fiemap_iter(&iter, fi, &prev); - start += ret; - len -= ret; - } - - if (ctx.prev.type != IOMAP_HOLE) { - ret = iomap_to_fiemap(fi, &ctx.prev, FIEMAP_EXTENT_LAST); + if (prev.type != IOMAP_HOLE) { + ret = iomap_to_fiemap(fi, &prev, FIEMAP_EXTENT_LAST); if (ret < 0) return ret; } + /* inode with no (attribute) mapping will give ENOENT */ + if (ret < 0 && ret != -ENOENT) + return ret; return 0; } EXPORT_SYMBOL_GPL(iomap_fiemap);