From patchwork Mon Apr 15 23:41:03 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: 13630820 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 DF2DF156967; Mon, 15 Apr 2024 23:41:04 +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=1713224465; cv=none; b=rZ5IOWf3ZHwYMpBmjY87YEL8lCa87dEEi7gdHUoM3vhD5JzvPQP5nkblQrXbjOR0wKqak3ItuLURlTW63qr4e3bMYeUE8q8sOtAbDkTVSzRKXX+NbkpiHiH0rF9qRk0nNUQAxCWaFOfPlPoRfv/LgwtT1Ih6+Ttxz55VxqghLFo= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1713224465; c=relaxed/simple; bh=tErBx4Jr4zXE2+GsjxRUd2QtGTTIXCbw61rLMiT4F3k=; h=Date:Subject:From:To:Cc:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=GBPlZILTFCFw+mBVz/3yorQBADYjfCjax7csu+vkXYhsgoebwKtOaQPbrfkvwylm16jVCV6d1vMr8NloVXqXiRsDAf8aV00RM3RGTPNakyKZR4o8oPhx81mDnSjEp9NWmUOqC+t0His49xpFMJLthbIZN7qZyxCJdh20ydIIFlg= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=HS3376ix; 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="HS3376ix" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 65641C113CC; Mon, 15 Apr 2024 23:41:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1713224464; bh=tErBx4Jr4zXE2+GsjxRUd2QtGTTIXCbw61rLMiT4F3k=; h=Date:Subject:From:To:Cc:In-Reply-To:References:From; b=HS3376ix5mYOeJnHB/8vafYSXdQqhsJCPDcvbAYMAEXJqQcML2enJ4D23DgI3AJin XFq2PJU11DARmM3l3pFPFMFjO5DuHvm1afh13dym18Ex8EZBvi13/z1tymCYf0fsNd KHbNsgumw2RPKjeGWxBKJ7d0p2+Lafp88YZpklviHTNM2WBREBR7BauaL0WXkDncxe x2We3kjhOGq+CodHck3R9fSriF+ngGOzQufZhMsQ9UxG2jxZN3FT6QitakK49OKKkQ JY8cdOakzHpigEEfIiAwXzYY9mQu8UQ9AqyzyqhBCF4CrXCXtyuvauz2puSXi36Kzx b/cvE0roLuvsg== Date: Mon, 15 Apr 2024 16:41:03 -0700 Subject: [PATCH 01/15] vfs: export remap and write check helpers From: "Darrick J. Wong" To: chandanbabu@kernel.org, djwong@kernel.org Cc: linux-fsdevel@vger.kernel.org, Christoph Hellwig , hch@lst.de, linux-fsdevel@vger.kernel.org, linux-xfs@vger.kernel.org Message-ID: <171322381237.87355.17055121600436347427.stgit@frogsfrogsfrogs> In-Reply-To: <171322381182.87355.15534989930482135103.stgit@frogsfrogsfrogs> References: <171322381182.87355.15534989930482135103.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 d4c036e82b6c..85c096f2c0d0 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 de07f978ce3e..28246dfc8485 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 8dfd53b52744..0835faeebe7b 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -2119,6 +2119,7 @@ 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,