From patchwork Sat Mar 30 00:57:11 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: 13611395 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 4B35B15CB; Sat, 30 Mar 2024 00:57:11 +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=1711760232; cv=none; b=JUAdRnGW3U7MiI9ci0oinBwLbWeDp0DGnDqs36YDYHjJqewNNZuMRMDRuhOIOkQMEU7iQG8wznYNVDpYcQy9P0zjtDVsPBSrr8/JdFp+RpaYJNj1jGbuvWCmWEf0f65sGpka1UOWXniGB+ULrsxt+gAmXn/T7Mk//CVJ+b5hYSg= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1711760232; 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=IbNDdHUlZdiQsoSF1K+rO3IIjuJkHS2+E9ZSyst7fyf8W78fsRXyCTJICF+gdezGnRSHe/ydEyi3eCT2pI2LD6VGauGQdyTVN7tSXzCtXlP21u8jPaTqAiQaoYs+Vc0n0R9AzRTT8L7ZI0Mi1u3uG+lFd13NoPRd/m+McKd8yZA= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=G2GSdj3b; 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="G2GSdj3b" Received: by smtp.kernel.org (Postfix) with ESMTPSA id C6609C433C7; Sat, 30 Mar 2024 00:57:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1711760231; bh=fWF/GOrEFq92DLREoy1D7sjTCgpcyZGH/3/RhOMHjn8=; h=Date:Subject:From:To:Cc:In-Reply-To:References:From; b=G2GSdj3bsEms9Sw7ZsnoX7cRNRsRarnFHRHYjsG4cPu8qB19yyB4ZO0N7PMxAp7CV tDTbWFaED+FWgfc+brMTOAmylnahw6hrEh7MTbdV0CqXLwYTyaPdyUN0CriE69FFlO XgxBOQEcSqHR9R1F8SNDazjpMn3Tkj2EVwPyM9E241Y/ep6YLOicJi4gnYI37E2sgv ArO/A2UROBA17ynlgbNSxQaE5hkFgkvzsbdKJkF+QLuxdtOifYhGkS6gYugZMfoXDC xPsY0Ol2k8eUUjlVO7qy7U9TmqxAbKYqq4yz1iK3eJA44hYSM3GhkJbl2CravD51ne 3kFBjRnVXH6Bg== Date: Fri, 29 Mar 2024 17:57:11 -0700 Subject: [PATCH 01/14] vfs: export remap and write check helpers From: "Darrick J. Wong" To: djwong@kernel.org Cc: linux-fsdevel@vger.kernel.org, Christoph Hellwig , linux-fsdevel@vger.kernel.org, hch@lst.de, linux-xfs@vger.kernel.org Message-ID: <171176018692.2014991.9057903191389511791.stgit@frogsfrogsfrogs> In-Reply-To: <171176018639.2014991.12163554496963657299.stgit@frogsfrogsfrogs> References: <171176018639.2014991.12163554496963657299.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,