From patchwork Sun Dec 31 20:25:48 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Darrick J. Wong" X-Patchwork-Id: 13507402 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 67537BA2B for ; Sun, 31 Dec 2023 20:25:49 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="d45mPW5Q" Received: by smtp.kernel.org (Postfix) with ESMTPSA id C58C9C433C7; Sun, 31 Dec 2023 20:25:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1704054348; bh=JKHnAMPrOVMhXLqlrao1pawLGYGhySHTm2enCiZh9vI=; h=Date:Subject:From:To:Cc:In-Reply-To:References:From; b=d45mPW5Q8wZ2rR5AuPIVOabffQnUplKG6UrxbONzrpwPzR3WWOrGvQy/BYqM7HKk6 8ju8UX/X8Qf2DMqAwopCFhbHTc76W+T6nRYUwDLHw1Zn1ac/p3Oya4Em3OCY0yGypX v96l/VZdpVslYYGXQEoWPRGaTeUz8nNis4zK9t/B808UycGNd2CU6CxlXf0QJhfi8R XihMwPxDqF7++4Q+2L+jL2P/Wryd0x5ja7pUoywbfv0uaINpClTGAzF+564kP3fOc3 mEluWu7rkNEa25Q4iUR9AdiMoozmjX6iaF7RsstCi5brPO5A5j8sgrJCCj8m+ZE2zV PDlJpyi8jtZ8A== Date: Sun, 31 Dec 2023 12:25:48 -0800 Subject: [PATCH 06/25] xfs: create a new helper to return a file's allocation unit From: "Darrick J. Wong" To: djwong@kernel.org Cc: linux-xfs@vger.kernel.org Message-ID: <170404833234.1750288.618883893221493614.stgit@frogsfrogsfrogs> In-Reply-To: <170404833081.1750288.16964477956002067164.stgit@frogsfrogsfrogs> References: <170404833081.1750288.16964477956002067164.stgit@frogsfrogsfrogs> User-Agent: StGit/0.19 Precedence: bulk X-Mailing-List: linux-xfs@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: Darrick J. Wong Create a new helper function to calculate the fundamental allocation unit (i.e. the smallest unit of space we can allocate) of a file. Things are going to get hairy with range-exchange on the realtime device, so prepare for this now. While we're at it, export xfs_is_falloc_aligned since the next patch will need it. Signed-off-by: Darrick J. Wong --- fs/xfs/xfs_file.c | 28 ++++++++++------------------ fs/xfs/xfs_file.h | 3 +++ fs/xfs/xfs_inode.c | 13 +++++++++++++ fs/xfs/xfs_inode.h | 1 + 4 files changed, 27 insertions(+), 18 deletions(-) diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c index 9becf6a075361..8ac3bc98e4369 100644 --- a/fs/xfs/xfs_file.c +++ b/fs/xfs/xfs_file.c @@ -39,33 +39,25 @@ static const struct vm_operations_struct xfs_file_vm_ops; * Decide if the given file range is aligned to the size of the fundamental * allocation unit for the file. */ -static bool +bool xfs_is_falloc_aligned( struct xfs_inode *ip, loff_t pos, long long int len) { - struct xfs_mount *mp = ip->i_mount; - uint64_t mask; + unsigned int alloc_unit = xfs_inode_alloc_unitsize(ip); - if (XFS_IS_REALTIME_INODE(ip)) { - if (!is_power_of_2(mp->m_sb.sb_rextsize)) { - u64 rextbytes; - u32 mod; + if (!is_power_of_2(alloc_unit)) { + u32 mod; - rextbytes = XFS_FSB_TO_B(mp, mp->m_sb.sb_rextsize); - div_u64_rem(pos, rextbytes, &mod); - if (mod) - return false; - div_u64_rem(len, rextbytes, &mod); - return mod == 0; - } - mask = XFS_FSB_TO_B(mp, mp->m_sb.sb_rextsize) - 1; - } else { - mask = mp->m_sb.sb_blocksize - 1; + div_u64_rem(pos, alloc_unit, &mod); + if (mod) + return false; + div_u64_rem(len, alloc_unit, &mod); + return mod == 0; } - return !((pos | len) & mask); + return !((pos | len) & (alloc_unit - 1)); } /* diff --git a/fs/xfs/xfs_file.h b/fs/xfs/xfs_file.h index 7d39e3eca56dc..2ad91f755caf3 100644 --- a/fs/xfs/xfs_file.h +++ b/fs/xfs/xfs_file.h @@ -9,4 +9,7 @@ extern const struct file_operations xfs_file_operations; extern const struct file_operations xfs_dir_file_operations; +bool xfs_is_falloc_aligned(struct xfs_inode *ip, loff_t pos, + long long int len); + #endif /* __XFS_FILE_H__ */ diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c index faa3d0abf4551..15668dbc5ca9e 100644 --- a/fs/xfs/xfs_inode.c +++ b/fs/xfs/xfs_inode.c @@ -4015,3 +4015,16 @@ xfs_break_layouts( return error; } + +/* Returns the size of fundamental allocation unit for a file, in bytes. */ +unsigned int +xfs_inode_alloc_unitsize( + struct xfs_inode *ip) +{ + unsigned int blocks = 1; + + if (XFS_IS_REALTIME_INODE(ip)) + blocks = ip->i_mount->m_sb.sb_rextsize; + + return XFS_FSB_TO_B(ip->i_mount, blocks); +} diff --git a/fs/xfs/xfs_inode.h b/fs/xfs/xfs_inode.h index 5e2f163fd7445..e1d60ba75bbdd 100644 --- a/fs/xfs/xfs_inode.h +++ b/fs/xfs/xfs_inode.h @@ -625,6 +625,7 @@ int xfs_inode_reload_unlinked(struct xfs_inode *ip); bool xfs_ifork_zapped(const struct xfs_inode *ip, int whichfork); void xfs_inode_count_blocks(struct xfs_trans *tp, struct xfs_inode *ip, xfs_filblks_t *dblocks, xfs_filblks_t *rblocks); +unsigned int xfs_inode_alloc_unitsize(struct xfs_inode *ip); struct xfs_dir_update_params { const struct xfs_inode *dp;