From patchwork Wed Mar 27 01:53:05 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Darrick J. Wong" X-Patchwork-Id: 13605397 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 5254618C36; Wed, 27 Mar 2024 01:53:06 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1711504386; cv=none; b=NLKDF+9GNXaiuqyrSBX8G6sbZ22tqgtG6LouMaPteln524BlQKsDQHw9oE05HkkFYa0+f0E8gLhsZRIS3NnnN1ymhUDEmlWgP26clsooN4Dq1BdVna3L3izI67DJvpXfEnhyljgtC3aNkuUhz0zxg3aAG4+NKZBMq3t8who68ys= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1711504386; c=relaxed/simple; bh=fWF/GOrEFq92DLREoy1D7sjTCgpcyZGH/3/RhOMHjn8=; h=Date:Subject:From:To:Cc:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=cmpMixhAuLH6p+ybuvfyTghD8K9uCLJvFSP3TgnqgRCh1UWjVGMU0ArWBeilh1hLNAJVj+e6qKInwIbTf1nn6aod1HKmQoP0JH6arssBx5/2ifuQ69kLNeFNo0moeChd0Vo9hopAa9j4kfaCNNbRemnOel7nAY6P5pHVFMdf50w= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=XPafyMyB; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="XPafyMyB" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 22025C433B2; Wed, 27 Mar 2024 01:53:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1711504386; bh=fWF/GOrEFq92DLREoy1D7sjTCgpcyZGH/3/RhOMHjn8=; h=Date:Subject:From:To:Cc:In-Reply-To:References:From; b=XPafyMyB6m79tKnMzD6Tr8yT8RAJvzYNSW51eZ6BGHpIoIp/F4gR/hiKPh5Cx3C/U evMxGpF3Yp0Xrm6LdQVAjDkeSpkw3BvI7UC2yhINlTChI/kaFcPNEbQul0AXRDgtyU 7+2DeeGmeYjy+YO/STH1hyn8GFN8h30vCUw9otpCoAHz81GHxB+kn4snTw/H+SaUsp VicBRSKxAv2L5CmkG9ERX66Q0+tSeFVUlHF3EUnk9NxJ2MJWP/rC14crAQr3yvkGPm RE0Knw/Ezm5t11do7RIvruVR3SM3gRAkNgvGfL56PSSNqVWcewfX+Arvtz/xxakTTF XaViuG3AR2hmQ== Date: Tue, 26 Mar 2024 18:53:05 -0700 Subject: [PATCH 01/15] vfs: export remap and write check helpers From: "Darrick J. Wong" To: djwong@kernel.org Cc: linux-fsdevel@vger.kernel.org, Christoph Hellwig , hch@lst.de, linux-xfs@vger.kernel.org Message-ID: <171150380682.3216674.8890477329517035702.stgit@frogsfrogsfrogs> In-Reply-To: <171150380628.3216674.10385855831925961243.stgit@frogsfrogsfrogs> References: <171150380628.3216674.10385855831925961243.stgit@frogsfrogsfrogs> User-Agent: StGit/0.19 Precedence: bulk X-Mailing-List: linux-fsdevel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: Darrick J. Wong Export these functions so that the next patch can use them to check the file ranges being passed to the XFS_IOC_EXCHANGE_RANGE operation. Cc: linux-fsdevel@vger.kernel.org Signed-off-by: Darrick J. Wong Reviewed-by: Christoph Hellwig --- fs/read_write.c | 1 + fs/remap_range.c | 4 ++-- include/linux/fs.h | 1 + 3 files changed, 4 insertions(+), 2 deletions(-) diff --git a/fs/read_write.c b/fs/read_write.c index d4c036e82b6c3..85c096f2c0d06 100644 --- a/fs/read_write.c +++ b/fs/read_write.c @@ -1667,6 +1667,7 @@ int generic_write_check_limits(struct file *file, loff_t pos, loff_t *count) return 0; } +EXPORT_SYMBOL_GPL(generic_write_check_limits); /* Like generic_write_checks(), but takes size of write instead of iter. */ int generic_write_checks_count(struct kiocb *iocb, loff_t *count) diff --git a/fs/remap_range.c b/fs/remap_range.c index de07f978ce3eb..28246dfc84851 100644 --- a/fs/remap_range.c +++ b/fs/remap_range.c @@ -99,8 +99,7 @@ static int generic_remap_checks(struct file *file_in, loff_t pos_in, return 0; } -static int remap_verify_area(struct file *file, loff_t pos, loff_t len, - bool write) +int remap_verify_area(struct file *file, loff_t pos, loff_t len, bool write) { int mask = write ? MAY_WRITE : MAY_READ; loff_t tmp; @@ -118,6 +117,7 @@ static int remap_verify_area(struct file *file, loff_t pos, loff_t len, return fsnotify_file_area_perm(file, mask, &pos, len); } +EXPORT_SYMBOL_GPL(remap_verify_area); /* * Ensure that we don't remap a partial EOF block in the middle of something diff --git a/include/linux/fs.h b/include/linux/fs.h index 00fc429b0af0f..9cbec9750d86b 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -2117,6 +2117,7 @@ extern ssize_t vfs_read(struct file *, char __user *, size_t, loff_t *); extern ssize_t vfs_write(struct file *, const char __user *, size_t, loff_t *); extern ssize_t vfs_copy_file_range(struct file *, loff_t , struct file *, loff_t, size_t, unsigned int); +int remap_verify_area(struct file *file, loff_t pos, loff_t len, bool write); int __generic_remap_file_range_prep(struct file *file_in, loff_t pos_in, struct file *file_out, loff_t pos_out, loff_t *len, unsigned int remap_flags,