From patchwork Tue Aug 27 06:50:45 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 13778950 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 299523A1C4; Tue, 27 Aug 2024 06:51:34 +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=1724741495; cv=none; b=donUhzw2rdA9RUjuuHl1lNlN1pq/TSY3HHnEHE25ubIvH75cG5ZocpWqT1qnLs1DN+0SZKyf89cebCs//7xkme7v39/x8Np0YH+GPrT9KG6f48QjLjturlyaMBjOKFXhn+JhSmbujzu5INHrE2mQ68nISn3akmBZGUpYoysKSwA= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724741495; c=relaxed/simple; bh=GFDgSREkc10KvJibkFoMGKetqK6/aq+WcOR08cWF8OQ=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=kFBJmogakKrnWbudMTOGGtNoCzL3lRUzd3wAyonbdto5+DDovms+TWiDiFPAq5FlAGoaa2+YMG+IRKUJhhn1LrcSspcyo5gCczUnxL1FnAXz2ToRD5dojr8grsiKVYHlZEjy8a6bV78MbwYiydJDKks3ejMgmy3Vrmms6Or6ksg= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (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=T/xBkBlC; arc=none smtp.client-ip=198.137.202.133 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (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="T/xBkBlC" 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=Qqxbe0v5qYjyQtS6Ev502TIe5IRKBV0K7OLmDV05ewU=; b=T/xBkBlCmF1znEw/QhxcgU9uSQ 2rSFF2TBCbArQ5JmjbniSg04piyjhdYmCksiv/wT3WjaOYAaY/dyiH6zTB5wqvACCXDNQvEFqmjVR Ch5cI47req7Bs2Cv84EnPxyT5myY3JL0JIw04ibatvEXVjBYPBy5LovATfovE+bwm9gBGTDQdjw3q aW6q1/wPp+wwNa4gzgJlPCgtJ9g4PIDwS73yve6iAYwXAA+DtzSn0KUDK5ovdio42TtcsMUVcPaCb xGyWg462qAV87j27UmgjKg7fPK97CImsmlCIpdSi3ofOZn60GKzgAUDVmSfzVF6pCflsE9FgwkUBB GINvSmOw==; Received: from 2a02-8389-2341-5b80-0483-5781-2c2b-8fb4.cable.dynamic.v6.surfer.at ([2a02:8389:2341:5b80:483:5781:2c2b:8fb4] helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.97.1 #2 (Red Hat Linux)) id 1siq37-0000000A6AF-2xNl; Tue, 27 Aug 2024 06:51:30 +0000 From: Christoph Hellwig To: Christian Brauner , Alexander Viro , Chandan Babu R Cc: Brian Foster , Jens Axboe , Jan Kara , "Darrick J. Wong" , "Theodore Ts'o" , linux-block@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-xfs@vger.kernel.org, linux-ext4@vger.kernel.org Subject: [PATCH 1/6] block: remove checks for FALLOC_FL_NO_HIDE_STALE Date: Tue, 27 Aug 2024 08:50:45 +0200 Message-ID: <20240827065123.1762168-2-hch@lst.de> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240827065123.1762168-1-hch@lst.de> References: <20240827065123.1762168-1-hch@lst.de> Precedence: bulk X-Mailing-List: linux-block@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html While the FALLOC_FL_NO_HIDE_STALE value has been registered, it has always been rejected by vfs_fallocate before making it into blkdev_fallocate because it isn't in the supported mask. Signed-off-by: Christoph Hellwig Reviewed-by: Darrick J. Wong Reviewed-by: Jan Kara --- block/fops.c | 10 +--------- 1 file changed, 1 insertion(+), 9 deletions(-) diff --git a/block/fops.c b/block/fops.c index 9825c1713a49a9..7f48f03a62e9a8 100644 --- a/block/fops.c +++ b/block/fops.c @@ -771,7 +771,7 @@ static ssize_t blkdev_read_iter(struct kiocb *iocb, struct iov_iter *to) #define BLKDEV_FALLOC_FL_SUPPORTED \ (FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE | \ - FALLOC_FL_ZERO_RANGE | FALLOC_FL_NO_HIDE_STALE) + FALLOC_FL_ZERO_RANGE) static long blkdev_fallocate(struct file *file, int mode, loff_t start, loff_t len) @@ -830,14 +830,6 @@ static long blkdev_fallocate(struct file *file, int mode, loff_t start, len >> SECTOR_SHIFT, GFP_KERNEL, BLKDEV_ZERO_NOFALLBACK); break; - case FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE | FALLOC_FL_NO_HIDE_STALE: - error = truncate_bdev_range(bdev, file_to_blk_mode(file), start, end); - if (error) - goto fail; - - error = blkdev_issue_discard(bdev, start >> SECTOR_SHIFT, - len >> SECTOR_SHIFT, GFP_KERNEL); - break; default: error = -EOPNOTSUPP; } From patchwork Tue Aug 27 06:50:46 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 13778951 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 D8E873A1C4; Tue, 27 Aug 2024 06:51:36 +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=1724741498; cv=none; b=pzlxrFVBHprjmaFop5f4KRd3JrOY08LTeyuKktJCwZ1UXQuFaU8ZHJ6pShF8UBkZbbYjUbYkwWqQl5DAyzX/uTRFXzT+KIVvivyPHL7sJRojBuIx59ZCPDzK49p35V+MNqHomnLs43aUFVC0NeudwoCQ03UPAIERWQEDKPnWEgE= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724741498; c=relaxed/simple; bh=rOo2NxP2pTdwjbOUifV5uf6WjDmc6V9X7z35uyGqPdk=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=VafuAAbj9W+IkkxM/V/LnV43Xj4bgrMKnFED0HrMozQmyk4x3LxY65TUnXQ5yrdNezDGvX8NigbbfMt5QzA8ZzEga6g1kxgXxGm+eV3oJEeSwtDITXrCzMjqPHnONuOgsKS/j5/E2fTsimBzrXfId1/GjToNtComc/S2mg1ab9Q= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (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=T1mP+OC1; arc=none smtp.client-ip=198.137.202.133 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (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="T1mP+OC1" 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=zMuI4AlzPiw69VELJGR7bipT5idXuxdPfDreEdpi1d8=; b=T1mP+OC1A+7/+81uDYUNTQ/FTx Xm3kv28mLohaeGqJqshAcidu9H0Zw5inZ45XvYuHDA2pKW/Eh6U5fDkGhfARVR/Mv53pfn1dY2Fr5 T7Hh4m5q7xsclm/heJifUl6YO9obiw3LcXqzwDRk7H0WvVaNQ8ehHjgjEm+PsGnP22ALb6Yrr4Ep+ ger7gf8EACsJ6r+BEFLFzMd7iVz+wCegoDFco1fe63luy2fMuHDtPXrMq/+QtGGo4VXnTHjc/DiAK YUVZYsPTPar/drA+lJvsSEP6Rf3vu13qkHwZbXfNkbUhi6tdJUpu0WJIGaElDm4yc0O7jZXxj/8S+ 2MT4SzJw==; Received: from 2a02-8389-2341-5b80-0483-5781-2c2b-8fb4.cable.dynamic.v6.surfer.at ([2a02:8389:2341:5b80:483:5781:2c2b:8fb4] helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.97.1 #2 (Red Hat Linux)) id 1siq3A-0000000A6CD-1hKF; Tue, 27 Aug 2024 06:51:32 +0000 From: Christoph Hellwig To: Christian Brauner , Alexander Viro , Chandan Babu R Cc: Brian Foster , Jens Axboe , Jan Kara , "Darrick J. Wong" , "Theodore Ts'o" , linux-block@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-xfs@vger.kernel.org, linux-ext4@vger.kernel.org Subject: [PATCH 2/6] ext4: remove tracing for FALLOC_FL_NO_HIDE_STALE Date: Tue, 27 Aug 2024 08:50:46 +0200 Message-ID: <20240827065123.1762168-3-hch@lst.de> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240827065123.1762168-1-hch@lst.de> References: <20240827065123.1762168-1-hch@lst.de> Precedence: bulk X-Mailing-List: linux-block@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html FALLOC_FL_NO_HIDE_STALE can't make it past vfs_fallocate (and if the flag does what the name implies that's a good thing as it would be highly dangerous). Remove the dead tracing code for it. Signed-off-by: Christoph Hellwig Reviewed-by: Jan Kara --- include/trace/events/ext4.h | 1 - 1 file changed, 1 deletion(-) diff --git a/include/trace/events/ext4.h b/include/trace/events/ext4.h index cc5e9b7b2b44e7..156908641e68f1 100644 --- a/include/trace/events/ext4.h +++ b/include/trace/events/ext4.h @@ -91,7 +91,6 @@ TRACE_DEFINE_ENUM(ES_REFERENCED_B); #define show_falloc_mode(mode) __print_flags(mode, "|", \ { FALLOC_FL_KEEP_SIZE, "KEEP_SIZE"}, \ { FALLOC_FL_PUNCH_HOLE, "PUNCH_HOLE"}, \ - { FALLOC_FL_NO_HIDE_STALE, "NO_HIDE_STALE"}, \ { FALLOC_FL_COLLAPSE_RANGE, "COLLAPSE_RANGE"}, \ { FALLOC_FL_ZERO_RANGE, "ZERO_RANGE"}) From patchwork Tue Aug 27 06:50:47 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 13778952 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 322AD154423; Tue, 27 Aug 2024 06:51:39 +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=1724741500; cv=none; b=qyML2ujZn3t+IK7Cx4RfHMlIRfZ6kCH0lLnP6nizlg84ncTJBfDtnCrQWBZO5yYOOHcsYnk5s8WKijVvbcC8mzvgASKshHPmSdcaWxaO+Hv7cAdLJEF5e6w56wyd511ZkZp7KnJs1aFVBv7E+xKEbj8ibRi9zxv62g3EcVvnuxY= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724741500; c=relaxed/simple; bh=TnRqdOXouth/wzgptxsvrWOl1NnDK7lHlp6Vn9rKRao=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=DTDuMc12/lJTZjnrUhRm9luBvhTGQDjJPQv+VXxstLkBoLAm3ty4g76/6X4V2vEGUinTWmVxt8ZJAztsKiPABGa0WtQCB7ux9Ac73Fewe+b5rX9ywmOiD2BFhd/m4dJjZCV1Xb36NX1AoFfXSJ3D+DqVoET9ex/rad9IJcqVXW4= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (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=vkVwgqjr; arc=none smtp.client-ip=198.137.202.133 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (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="vkVwgqjr" 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=TSmmmA+NwDSjFGoWCpd3SuH0IZeeyH7C3vJkZ3IqSMk=; b=vkVwgqjrNDPw+tY+zDNZJ3VvZ6 sNfeoQFAvK5iXQEHFEkRl5xA+CP5FK3tibpM8UEE4+ULTpLYGt7bVEdImo1itHCrUX8frWkpQJsNl QlMkGXK+IKYY3ATynchZrIyqHZcjN6rM1XsqQ9NNJwMC2OGRnXtrTgy+6gMnFc5m61NH6WuJ+kXlg cblRNn0Sd4+GMhpjcwiuL+Gdf0rt8O60ssdIGt6z7rrd/k7ff2bjkRTdaIpnMfniNqRh1NDF22NMS pB6H9LVprwLPUJifVmukJz8FiHhSoxqNQKwzm6Ro6021ErIrInIxV3r94XGneODSmUdkUx0A1afxV rA3zQ9DA==; Received: from 2a02-8389-2341-5b80-0483-5781-2c2b-8fb4.cable.dynamic.v6.surfer.at ([2a02:8389:2341:5b80:483:5781:2c2b:8fb4] helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.97.1 #2 (Red Hat Linux)) id 1siq3C-0000000A6Dr-3ybL; Tue, 27 Aug 2024 06:51:35 +0000 From: Christoph Hellwig To: Christian Brauner , Alexander Viro , Chandan Babu R Cc: Brian Foster , Jens Axboe , Jan Kara , "Darrick J. Wong" , "Theodore Ts'o" , linux-block@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-xfs@vger.kernel.org, linux-ext4@vger.kernel.org Subject: [PATCH 3/6] fs: sort out the fallocate mode vs flag mess Date: Tue, 27 Aug 2024 08:50:47 +0200 Message-ID: <20240827065123.1762168-4-hch@lst.de> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240827065123.1762168-1-hch@lst.de> References: <20240827065123.1762168-1-hch@lst.de> Precedence: bulk X-Mailing-List: linux-block@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html The fallocate system call takes a mode argument, but that argument contains a wild mix of exclusive modes and an optional flags. Replace FALLOC_FL_SUPPORTED_MASK with FALLOC_FL_MODE_MASK, which excludes the optional flag bit, so that we can use switch statement on the value to easily enumerate the cases while getting the check for duplicate modes for free. To make this (and in the future the file system implementations) more readable also add a symbolic name for the 0 mode used to allocate blocks. Signed-off-by: Christoph Hellwig Reviewed-by: Darrick J. Wong Reviewed-by: Jan Kara --- fs/open.c | 51 ++++++++++++++++++------------------- include/linux/falloc.h | 18 ++++++++----- include/uapi/linux/falloc.h | 1 + 3 files changed, 38 insertions(+), 32 deletions(-) diff --git a/fs/open.c b/fs/open.c index 22adbef7ecc2a6..daf1b55ca8180b 100644 --- a/fs/open.c +++ b/fs/open.c @@ -252,40 +252,39 @@ int vfs_fallocate(struct file *file, int mode, loff_t offset, loff_t len) if (offset < 0 || len <= 0) return -EINVAL; - /* Return error if mode is not supported */ - if (mode & ~FALLOC_FL_SUPPORTED_MASK) + if (mode & ~(FALLOC_FL_MODE_MASK | FALLOC_FL_KEEP_SIZE)) return -EOPNOTSUPP; - /* Punch hole and zero range are mutually exclusive */ - if ((mode & (FALLOC_FL_PUNCH_HOLE | FALLOC_FL_ZERO_RANGE)) == - (FALLOC_FL_PUNCH_HOLE | FALLOC_FL_ZERO_RANGE)) - return -EOPNOTSUPP; - - /* Punch hole must have keep size set */ - if ((mode & FALLOC_FL_PUNCH_HOLE) && - !(mode & FALLOC_FL_KEEP_SIZE)) + /* + * Modes are exclusive, even if that is not obvious from the encoding + * as bit masks and the mix with the flag in the same namespace. + * + * To make things even more complicated, FALLOC_FL_ALLOCATE_RANGE is + * encoded as no bit set. + */ + switch (mode & FALLOC_FL_MODE_MASK) { + case FALLOC_FL_ALLOCATE_RANGE: + case FALLOC_FL_UNSHARE_RANGE: + case FALLOC_FL_ZERO_RANGE: + break; + case FALLOC_FL_PUNCH_HOLE: + if (!(mode & FALLOC_FL_KEEP_SIZE)) + return -EOPNOTSUPP; + break; + case FALLOC_FL_COLLAPSE_RANGE: + case FALLOC_FL_INSERT_RANGE: + if (mode & FALLOC_FL_KEEP_SIZE) + return -EOPNOTSUPP; + break; + default: return -EOPNOTSUPP; - - /* Collapse range should only be used exclusively. */ - if ((mode & FALLOC_FL_COLLAPSE_RANGE) && - (mode & ~FALLOC_FL_COLLAPSE_RANGE)) - return -EINVAL; - - /* Insert range should only be used exclusively. */ - if ((mode & FALLOC_FL_INSERT_RANGE) && - (mode & ~FALLOC_FL_INSERT_RANGE)) - return -EINVAL; - - /* Unshare range should only be used with allocate mode. */ - if ((mode & FALLOC_FL_UNSHARE_RANGE) && - (mode & ~(FALLOC_FL_UNSHARE_RANGE | FALLOC_FL_KEEP_SIZE))) - return -EINVAL; + } if (!(file->f_mode & FMODE_WRITE)) return -EBADF; /* - * We can only allow pure fallocate on append only files + * On append-only files only space preallocation is supported. */ if ((mode & ~FALLOC_FL_KEEP_SIZE) && IS_APPEND(inode)) return -EPERM; diff --git a/include/linux/falloc.h b/include/linux/falloc.h index f3f0b97b167579..3f49f3df6af5fb 100644 --- a/include/linux/falloc.h +++ b/include/linux/falloc.h @@ -25,12 +25,18 @@ struct space_resv { #define FS_IOC_UNRESVSP64 _IOW('X', 43, struct space_resv) #define FS_IOC_ZERO_RANGE _IOW('X', 57, struct space_resv) -#define FALLOC_FL_SUPPORTED_MASK (FALLOC_FL_KEEP_SIZE | \ - FALLOC_FL_PUNCH_HOLE | \ - FALLOC_FL_COLLAPSE_RANGE | \ - FALLOC_FL_ZERO_RANGE | \ - FALLOC_FL_INSERT_RANGE | \ - FALLOC_FL_UNSHARE_RANGE) +/* + * Mask of all supported fallocate modes. Only one can be set at a time. + * + * In addition to the mode bit, the mode argument can also encode flags. + * FALLOC_FL_KEEP_SIZE is the only supported flag so far. + */ +#define FALLOC_FL_MODE_MASK (FALLOC_FL_ALLOCATE_RANGE | \ + FALLOC_FL_PUNCH_HOLE | \ + FALLOC_FL_COLLAPSE_RANGE | \ + FALLOC_FL_ZERO_RANGE | \ + FALLOC_FL_INSERT_RANGE | \ + FALLOC_FL_UNSHARE_RANGE) /* on ia32 l_start is on a 32-bit boundary */ #if defined(CONFIG_X86_64) diff --git a/include/uapi/linux/falloc.h b/include/uapi/linux/falloc.h index 51398fa57f6cdf..5810371ed72bbd 100644 --- a/include/uapi/linux/falloc.h +++ b/include/uapi/linux/falloc.h @@ -2,6 +2,7 @@ #ifndef _UAPI_FALLOC_H_ #define _UAPI_FALLOC_H_ +#define FALLOC_FL_ALLOCATE_RANGE 0x00 /* allocate range */ #define FALLOC_FL_KEEP_SIZE 0x01 /* default is extend size */ #define FALLOC_FL_PUNCH_HOLE 0x02 /* de-allocates range */ #define FALLOC_FL_NO_HIDE_STALE 0x04 /* reserved codepoint */ From patchwork Tue Aug 27 06:50:48 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 13778953 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 B1BAA54F87; Tue, 27 Aug 2024 06:51:40 +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=1724741502; cv=none; b=QMZ/rjnh49pxLzf8AZ+Bl6E8ajXkvvTFdyQ3HBANbuaXQnxvwOo7Aa7V9h1sUnL0LkkqvLqoPKcyEhM0B64jr0gB5WRKn15BGhFlp2FpazKBx8eMZS3U49Db7KgwWBMS4yUszrWd2YL34NVA6Pxt6hOiwceYBi5ZEdyhyQKOgkM= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724741502; c=relaxed/simple; bh=+NdG1kCwaliZzAQZOcdJAlZqRpuTUGhbpRb2bsYWZXc=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=CQVYTSxqT+B9gM1eYhNlrtt3oljicxpD+uNX+FHHzpudZbNoCpq1pQOjIcgl8Y6yOKliqzgbkBUJpeUnjStfHfJ7w9ybt/d2OX/TdwRRVstXoC5WMhF+3XSdMHTv/C51MpJw7yVpE9FCD8RY5OsjfX7SBZPi6fvUw9FAIwrIA70= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (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=tk10eFis; arc=none smtp.client-ip=198.137.202.133 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (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="tk10eFis" 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=5dRb2FOCAtKiyzIKWuqXAjQXmiwkQGtbalsiqji/vfU=; b=tk10eFisrHzPv7legCS0PeZkEK WVos2rprbklZVLAy+l31p0AiLJpTu9mBCQYkDKc+UM4dyTri9Up/QdHwN9Wk5aKhxxRas//iO+YT2 Psb6+ekQ2NYHE5dORI4dTiFRKyaycmZELlEe3Ez4sp2T9Mz/1/GuBiJJ4oNPsFHDPU9pm0V7Fvy/U YlD+m/EX3mK4JqyHNYTxat5kKd64jw5eug8pDUognvnS2MBOtcpAkxw/03B1Bjh4fJiq1LRj7XdhU 96F7oUoA5jBKHDs22DlRhqDk8ky3ST9fj4HV7LB1/cC4KXhX3ejHoN7C41ZrANrSxZqSZ85dg92hp NANJCkzw==; Received: from 2a02-8389-2341-5b80-0483-5781-2c2b-8fb4.cable.dynamic.v6.surfer.at ([2a02:8389:2341:5b80:483:5781:2c2b:8fb4] helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.97.1 #2 (Red Hat Linux)) id 1siq3F-0000000A6FD-3iLa; Tue, 27 Aug 2024 06:51:38 +0000 From: Christoph Hellwig To: Christian Brauner , Alexander Viro , Chandan Babu R Cc: Brian Foster , Jens Axboe , Jan Kara , "Darrick J. Wong" , "Theodore Ts'o" , linux-block@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-xfs@vger.kernel.org, linux-ext4@vger.kernel.org Subject: [PATCH 4/6] xfs: call xfs_flush_unmap_range from xfs_free_file_space Date: Tue, 27 Aug 2024 08:50:48 +0200 Message-ID: <20240827065123.1762168-5-hch@lst.de> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240827065123.1762168-1-hch@lst.de> References: <20240827065123.1762168-1-hch@lst.de> Precedence: bulk X-Mailing-List: linux-block@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Call xfs_flush_unmap_range from xfs_free_file_space so that xfs_file_fallocate doesn't have to predict which mode will call it. Signed-off-by: Christoph Hellwig Reviewed-by: Darrick J. Wong --- fs/xfs/xfs_bmap_util.c | 8 ++++++++ fs/xfs/xfs_file.c | 21 --------------------- 2 files changed, 8 insertions(+), 21 deletions(-) diff --git a/fs/xfs/xfs_bmap_util.c b/fs/xfs/xfs_bmap_util.c index fe2e2c93097550..187a0dbda24fc4 100644 --- a/fs/xfs/xfs_bmap_util.c +++ b/fs/xfs/xfs_bmap_util.c @@ -848,6 +848,14 @@ xfs_free_file_space( if (len <= 0) /* if nothing being freed */ return 0; + /* + * Now AIO and DIO has drained we flush and (if necessary) invalidate + * the cached range over the first operation we are about to run. + */ + error = xfs_flush_unmap_range(ip, offset, len); + if (error) + return error; + startoffset_fsb = XFS_B_TO_FSB(mp, offset); endoffset_fsb = XFS_B_TO_FSBT(mp, offset + len); diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c index 4cdc54dc96862e..5b9e49da06013c 100644 --- a/fs/xfs/xfs_file.c +++ b/fs/xfs/xfs_file.c @@ -890,27 +890,6 @@ xfs_file_fallocate( */ inode_dio_wait(inode); - /* - * Now AIO and DIO has drained we flush and (if necessary) invalidate - * the cached range over the first operation we are about to run. - * - * We care about zero and collapse here because they both run a hole - * punch over the range first. Because that can zero data, and the range - * of invalidation for the shift operations is much larger, we still do - * the required flush for collapse in xfs_prepare_shift(). - * - * Insert has the same range requirements as collapse, and we extend the - * file first which can zero data. Hence insert has the same - * flush/invalidate requirements as collapse and so they are both - * handled at the right time by xfs_prepare_shift(). - */ - if (mode & (FALLOC_FL_PUNCH_HOLE | FALLOC_FL_ZERO_RANGE | - FALLOC_FL_COLLAPSE_RANGE)) { - error = xfs_flush_unmap_range(ip, offset, len); - if (error) - goto out_unlock; - } - error = file_modified(file); if (error) goto out_unlock; From patchwork Tue Aug 27 06:50:49 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 13778954 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 B416D148302; Tue, 27 Aug 2024 06:51:44 +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=1724741506; cv=none; b=Duoj/BPPFGID4P58pbuBU08d/zSEbWWvl0xMLirLvEb8beUQ0RPcNagCXPeSjJuORoYFAKgv03nL8CLwLhCM5AQY5bIQJ+6btMXeUWpjVCAkf1Fe+0yz/vYiGOGORGyGSFpvgj5v6dwaRSc75ZYzoc8rZMSNkWQPthJNFJuFLx8= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724741506; c=relaxed/simple; bh=NfsUmb0FFYcRiilsybc0zMaPYMckdg0NKbGXwdEKHHk=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=tKBqlW4upyFm7+md0gihfooaEQnIla98Zi1cgX5mXYi5G9SEsxwKXw597hmVFunklhAP0VimyARLMFsa49uOABzPQZyB2p/yrAcUzMruq4n6wgVaRITPpKpyCKtjmQbJ8wb81xi9J+YPrfqZw5tmuqZ07chNVluDuTJnn+ZxHAM= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (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=Lg59uPG5; arc=none smtp.client-ip=198.137.202.133 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (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="Lg59uPG5" 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=vU0kWYfABuwka6VI88n56wkqORAR2MTSaeAFqfvEHnk=; b=Lg59uPG5eq40QDvQwTnPpdsgi4 +MEvWz7QkRVrIvAiam21Z47zhKA47RaEck4OqEkzbxW4xyh9CSW9RrV3CA0xTLSW2WOh2oI3mbJyp taPEZM6TVC0dkTg2Nq4H4mxQRbYJata3DWKqSlX/v2SNSg3fQ1fQ5dIg0YZnH+p4qVHvx7XD8COfd PdKSppCV4S04Mne1xcwX2LZb2qhxBR5FA0y/g774nJUN3zjTaRyBKTRoQAzp+ryrG3qa7OBKR0dcn VB0O/JlgTLicRm+rGdtlSXrrK8XC6nDBf1jltOShY+WVtayM00GeQDIbyLbX/KyX/0Z2GL8zXRvcj DTLLjliQ==; Received: from 2a02-8389-2341-5b80-0483-5781-2c2b-8fb4.cable.dynamic.v6.surfer.at ([2a02:8389:2341:5b80:483:5781:2c2b:8fb4] helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.97.1 #2 (Red Hat Linux)) id 1siq3I-0000000A6Hc-2K1S; Tue, 27 Aug 2024 06:51:41 +0000 From: Christoph Hellwig To: Christian Brauner , Alexander Viro , Chandan Babu R Cc: Brian Foster , Jens Axboe , Jan Kara , "Darrick J. Wong" , "Theodore Ts'o" , linux-block@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-xfs@vger.kernel.org, linux-ext4@vger.kernel.org Subject: [PATCH 5/6] xfs: move the xfs_is_always_cow_inode check into xfs_alloc_file_space Date: Tue, 27 Aug 2024 08:50:49 +0200 Message-ID: <20240827065123.1762168-6-hch@lst.de> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240827065123.1762168-1-hch@lst.de> References: <20240827065123.1762168-1-hch@lst.de> Precedence: bulk X-Mailing-List: linux-block@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Move the xfs_is_always_cow_inode check from the caller into xfs_alloc_file_space to prepare for refactoring of xfs_file_fallocate. Signed-off-by: Christoph Hellwig Reviewed-by: Darrick J. Wong --- fs/xfs/xfs_bmap_util.c | 3 +++ fs/xfs/xfs_file.c | 8 +++----- 2 files changed, 6 insertions(+), 5 deletions(-) diff --git a/fs/xfs/xfs_bmap_util.c b/fs/xfs/xfs_bmap_util.c index 187a0dbda24fc4..e9fdebaa40ea59 100644 --- a/fs/xfs/xfs_bmap_util.c +++ b/fs/xfs/xfs_bmap_util.c @@ -653,6 +653,9 @@ xfs_alloc_file_space( xfs_bmbt_irec_t imaps[1], *imapp; int error; + if (xfs_is_always_cow_inode(ip)) + return 0; + trace_xfs_alloc_file_space(ip); if (xfs_is_shutdown(mp)) diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c index 5b9e49da06013c..489bc1b173c268 100644 --- a/fs/xfs/xfs_file.c +++ b/fs/xfs/xfs_file.c @@ -987,11 +987,9 @@ xfs_file_fallocate( } } - if (!xfs_is_always_cow_inode(ip)) { - error = xfs_alloc_file_space(ip, offset, len); - if (error) - goto out_unlock; - } + error = xfs_alloc_file_space(ip, offset, len); + if (error) + goto out_unlock; } /* Change file size if needed */ From patchwork Tue Aug 27 06:50:50 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 13778955 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 6196B14F125; Tue, 27 Aug 2024 06:51:49 +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=1724741511; cv=none; b=nXZghLnaAH/+7megJsQh2gyDkNW5H7IQXrrdz7/wd9BnFLD9cizdLGatbBHw6xSZPeqEU/ILS3lmWjmDq4prOKbWlfkxoc25VKtD/FRNCLK1r9dPfNPRx7Fcb4s2yNED4MCpksT0k2DFGG/pM0QF3uFHxaTpIv1ytcMo0SAgwUE= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724741511; c=relaxed/simple; bh=tfeNil0pfrXw6ME0t7fGrQrjjdoc28cbw8reh8kqs2U=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=JSujmRfBTeB0zxDQ1SF5gfnTYs923yH0dWtI1P9Aj1IWDbvDcSX0WvFjCMYGXLJrDKSnwGeCASAx6jAeZdKDC+sp01uPzJMd5SmIDsX0K1OqrQcDN7F6mITsOHW4rPa2IVSwQZ2SJYJ3khYuMnsq+/JMP19w1x81W5qGUJ2vSAQ= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (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=hMRQ/hV/; arc=none smtp.client-ip=198.137.202.133 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (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="hMRQ/hV/" 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=9wYmcaEE8NsgYmomZzTvqB0y9cXFR7KRv9djXiNijhs=; b=hMRQ/hV/RFzGv/GZMxcLRNA6TU DnMHIogJX3pPXYklWlaLcqoVaDy6y5DanE+d5mECDiASdMoVcR43DECRM0dAmy0gtnwttcmKCJQvl k6k83YUCVeRcMpDTfviKbW/VfMVBfuVgjP1J4+tt0bUVaD1p+F9qhpWDCqHfjBx9nvel4CLUV1rFx a3lzHL9W5lFK0eiSNm3pq0FUYc2kvHccXAfW5me3ZN/0CDBUK+AwptlQaSFbBT6/FB0C+S312aBwn +rsuMAYoQwzgI2KHh0XXtFD0tLg36Aeja+w/UX7vDpjouSAKY9a5oKqv9hlIqgX+ZhWDBozC6Nhyo 1vCplD/g==; Received: from 2a02-8389-2341-5b80-0483-5781-2c2b-8fb4.cable.dynamic.v6.surfer.at ([2a02:8389:2341:5b80:483:5781:2c2b:8fb4] helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.97.1 #2 (Red Hat Linux)) id 1siq3L-0000000A6Ix-32pZ; Tue, 27 Aug 2024 06:51:44 +0000 From: Christoph Hellwig To: Christian Brauner , Alexander Viro , Chandan Babu R Cc: Brian Foster , Jens Axboe , Jan Kara , "Darrick J. Wong" , "Theodore Ts'o" , linux-block@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-xfs@vger.kernel.org, linux-ext4@vger.kernel.org Subject: [PATCH 6/6] xfs: refactor xfs_file_fallocate Date: Tue, 27 Aug 2024 08:50:50 +0200 Message-ID: <20240827065123.1762168-7-hch@lst.de> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240827065123.1762168-1-hch@lst.de> References: <20240827065123.1762168-1-hch@lst.de> Precedence: bulk X-Mailing-List: linux-block@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Refactor xfs_file_fallocate into separate helpers for each mode, two factors for i_size handling and a single switch statement over the supported modes. Signed-off-by: Christoph Hellwig Reviewed-by: Darrick J. Wong --- fs/xfs/xfs_file.c | 330 +++++++++++++++++++++++++++++----------------- 1 file changed, 208 insertions(+), 122 deletions(-) diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c index 489bc1b173c268..f6e4912769a0d5 100644 --- a/fs/xfs/xfs_file.c +++ b/fs/xfs/xfs_file.c @@ -852,6 +852,192 @@ static inline bool xfs_file_sync_writes(struct file *filp) return false; } +static int +xfs_falloc_newsize( + struct file *file, + int mode, + loff_t offset, + loff_t len, + loff_t *new_size) +{ + struct inode *inode = file_inode(file); + + if ((mode & FALLOC_FL_KEEP_SIZE) || offset + len <= i_size_read(inode)) + return 0; + *new_size = offset + len; + return inode_newsize_ok(inode, *new_size); +} + +static int +xfs_falloc_setsize( + struct file *file, + loff_t new_size) +{ + struct iattr iattr = { + .ia_valid = ATTR_SIZE, + .ia_size = new_size, + }; + + if (!new_size) + return 0; + return xfs_vn_setattr_size(file_mnt_idmap(file), file_dentry(file), + &iattr); +} + +static int +xfs_falloc_collapse_range( + struct file *file, + loff_t offset, + loff_t len) +{ + struct inode *inode = file_inode(file); + loff_t new_size = i_size_read(inode) - len; + int error; + + if (!xfs_is_falloc_aligned(XFS_I(inode), offset, len)) + return -EINVAL; + + /* + * There is no need to overlap collapse range with EOF, in which case it + * is effectively a truncate operation + */ + if (offset + len >= i_size_read(inode)) + return -EINVAL; + + error = xfs_collapse_file_space(XFS_I(inode), offset, len); + if (error) + return error; + return xfs_falloc_setsize(file, new_size); +} + +static int +xfs_falloc_insert_range( + struct file *file, + loff_t offset, + loff_t len) +{ + struct inode *inode = file_inode(file); + loff_t isize = i_size_read(inode); + int error; + + if (!xfs_is_falloc_aligned(XFS_I(inode), offset, len)) + return -EINVAL; + + /* + * New inode size must not exceed ->s_maxbytes, accounting for + * possible signed overflow. + */ + if (inode->i_sb->s_maxbytes - isize < len) + return -EFBIG; + + /* Offset should be less than i_size */ + if (offset >= isize) + return -EINVAL; + + error = xfs_falloc_setsize(file, isize + len); + if (error) + return error; + + /* + * Perform hole insertion now that the file size has been updated so + * that if we crash during the operation we don't leave shifted extents + * past EOF and hence losing access to the data that is contained within + * them. + */ + return xfs_insert_file_space(XFS_I(inode), offset, len); +} + +/* + * Punch a hole and prealloc the range. We use a hole punch rather than + * unwritten extent conversion for two reasons: + * + * 1.) Hole punch handles partial block zeroing for us. + * 2.) If prealloc returns ENOSPC, the file range is still zero-valued by + * virtue of the hole punch. + */ +static int +xfs_falloc_zero_range( + struct file *file, + int mode, + loff_t offset, + loff_t len) +{ + struct inode *inode = file_inode(file); + unsigned int blksize = i_blocksize(inode); + loff_t new_size = 0; + int error; + + trace_xfs_zero_file_space(XFS_I(inode)); + + error = xfs_falloc_newsize(file, mode, offset, len, &new_size); + if (error) + return error; + + error = xfs_free_file_space(XFS_I(inode), offset, len); + if (error) + return error; + + len = round_up(offset + len, blksize) - round_down(offset, blksize); + offset = round_down(offset, blksize); + error = xfs_alloc_file_space(XFS_I(inode), offset, len); + if (error) + return error; + return xfs_falloc_setsize(file, new_size); +} + +static int +xfs_falloc_unshare_range( + struct file *file, + int mode, + loff_t offset, + loff_t len) +{ + struct inode *inode = file_inode(file); + loff_t new_size = 0; + int error; + + error = xfs_falloc_newsize(file, mode, offset, len, &new_size); + if (error) + return error; + + error = xfs_reflink_unshare(XFS_I(inode), offset, len); + if (error) + return error; + + error = xfs_alloc_file_space(XFS_I(inode), offset, len); + if (error) + return error; + return xfs_falloc_setsize(file, new_size); +} + +static int +xfs_falloc_allocate_range( + struct file *file, + int mode, + loff_t offset, + loff_t len) +{ + struct inode *inode = file_inode(file); + loff_t new_size = 0; + int error; + + /* + * If always_cow mode we can't use preallocations and thus should not + * create them. + */ + if (xfs_is_always_cow_inode(XFS_I(inode))) + return -EOPNOTSUPP; + + error = xfs_falloc_newsize(file, mode, offset, len, &new_size); + if (error) + return error; + + error = xfs_alloc_file_space(XFS_I(inode), offset, len); + if (error) + return error; + return xfs_falloc_setsize(file, new_size); +} + #define XFS_FALLOC_FL_SUPPORTED \ (FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE | \ FALLOC_FL_COLLAPSE_RANGE | FALLOC_FL_ZERO_RANGE | \ @@ -868,8 +1054,6 @@ xfs_file_fallocate( struct xfs_inode *ip = XFS_I(inode); long error; uint iolock = XFS_IOLOCK_EXCL | XFS_MMAPLOCK_EXCL; - loff_t new_size = 0; - bool do_file_insert = false; if (!S_ISREG(inode->i_mode)) return -EINVAL; @@ -894,129 +1078,31 @@ xfs_file_fallocate( if (error) goto out_unlock; - if (mode & FALLOC_FL_PUNCH_HOLE) { + switch (mode & FALLOC_FL_MODE_MASK) { + case FALLOC_FL_PUNCH_HOLE: error = xfs_free_file_space(ip, offset, len); - if (error) - goto out_unlock; - } else if (mode & FALLOC_FL_COLLAPSE_RANGE) { - if (!xfs_is_falloc_aligned(ip, offset, len)) { - error = -EINVAL; - goto out_unlock; - } - - /* - * There is no need to overlap collapse range with EOF, - * in which case it is effectively a truncate operation - */ - if (offset + len >= i_size_read(inode)) { - error = -EINVAL; - goto out_unlock; - } - - new_size = i_size_read(inode) - len; - - error = xfs_collapse_file_space(ip, offset, len); - if (error) - goto out_unlock; - } else if (mode & FALLOC_FL_INSERT_RANGE) { - loff_t isize = i_size_read(inode); - - if (!xfs_is_falloc_aligned(ip, offset, len)) { - error = -EINVAL; - goto out_unlock; - } - - /* - * New inode size must not exceed ->s_maxbytes, accounting for - * possible signed overflow. - */ - if (inode->i_sb->s_maxbytes - isize < len) { - error = -EFBIG; - goto out_unlock; - } - new_size = isize + len; - - /* Offset should be less than i_size */ - if (offset >= isize) { - error = -EINVAL; - goto out_unlock; - } - do_file_insert = true; - } else { - if (!(mode & FALLOC_FL_KEEP_SIZE) && - offset + len > i_size_read(inode)) { - new_size = offset + len; - error = inode_newsize_ok(inode, new_size); - if (error) - goto out_unlock; - } - - if (mode & FALLOC_FL_ZERO_RANGE) { - /* - * Punch a hole and prealloc the range. We use a hole - * punch rather than unwritten extent conversion for two - * reasons: - * - * 1.) Hole punch handles partial block zeroing for us. - * 2.) If prealloc returns ENOSPC, the file range is - * still zero-valued by virtue of the hole punch. - */ - unsigned int blksize = i_blocksize(inode); - - trace_xfs_zero_file_space(ip); - - error = xfs_free_file_space(ip, offset, len); - if (error) - goto out_unlock; - - len = round_up(offset + len, blksize) - - round_down(offset, blksize); - offset = round_down(offset, blksize); - } else if (mode & FALLOC_FL_UNSHARE_RANGE) { - error = xfs_reflink_unshare(ip, offset, len); - if (error) - goto out_unlock; - } else { - /* - * If always_cow mode we can't use preallocations and - * thus should not create them. - */ - if (xfs_is_always_cow_inode(ip)) { - error = -EOPNOTSUPP; - goto out_unlock; - } - } - - error = xfs_alloc_file_space(ip, offset, len); - if (error) - goto out_unlock; - } - - /* Change file size if needed */ - if (new_size) { - struct iattr iattr; - - iattr.ia_valid = ATTR_SIZE; - iattr.ia_size = new_size; - error = xfs_vn_setattr_size(file_mnt_idmap(file), - file_dentry(file), &iattr); - if (error) - goto out_unlock; - } - - /* - * Perform hole insertion now that the file size has been - * updated so that if we crash during the operation we don't - * leave shifted extents past EOF and hence losing access to - * the data that is contained within them. - */ - if (do_file_insert) { - error = xfs_insert_file_space(ip, offset, len); - if (error) - goto out_unlock; + break; + case FALLOC_FL_COLLAPSE_RANGE: + error = xfs_falloc_collapse_range(file, offset, len); + break; + case FALLOC_FL_INSERT_RANGE: + error = xfs_falloc_insert_range(file, offset, len); + break; + case FALLOC_FL_ZERO_RANGE: + error = xfs_falloc_zero_range(file, mode, offset, len); + break; + case FALLOC_FL_UNSHARE_RANGE: + error = xfs_falloc_unshare_range(file, mode, offset, len); + break; + case FALLOC_FL_ALLOCATE_RANGE: + error = xfs_falloc_allocate_range(file, mode, offset, len); + break; + default: + error = -EOPNOTSUPP; + break; } - if (xfs_file_sync_writes(file)) + if (!error && xfs_file_sync_writes(file)) error = xfs_log_force_inode(ip); out_unlock: