Re: [PATCH 09/10] staging: lustre: move remaining code from linux-module.c to module.c

From: James Simmons
Date: Wed May 02 2018 - 14:13:19 EST

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Previous message: James Simmons: "Re: [PATCH 08/10] staging: lustre: move misc-device registration closer to related code."
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> There is no longer any need to keep this code separate,
> and now we can remove linux-module.c
>
> Signed-off-by: NeilBrown <neilb@xxxxxxxx>

Reviewed-by: James Simmons <jsimmons@xxxxxxxxxxxxx>

> ---
> .../staging/lustre/include/linux/libcfs/libcfs.h | 4
> drivers/staging/lustre/lnet/libcfs/Makefile | 1
> .../lustre/lnet/libcfs/linux/linux-module.c | 168 --------------------
> drivers/staging/lustre/lnet/libcfs/module.c | 131 ++++++++++++++++
> 4 files changed, 131 insertions(+), 173 deletions(-)
> delete mode 100644 drivers/staging/lustre/lnet/libcfs/linux/linux-module.c
>
> diff --git a/drivers/staging/lustre/include/linux/libcfs/libcfs.h b/drivers/staging/lustre/include/linux/libcfs/libcfs.h
> index 9263e151451b..d420449b620e 100644
> --- a/drivers/staging/lustre/include/linux/libcfs/libcfs.h
> +++ b/drivers/staging/lustre/include/linux/libcfs/libcfs.h
> @@ -138,10 +138,6 @@ struct libcfs_ioctl_handler {
> int libcfs_register_ioctl(struct libcfs_ioctl_handler *hand);
> int libcfs_deregister_ioctl(struct libcfs_ioctl_handler *hand);
>
> -int libcfs_ioctl_getdata(struct libcfs_ioctl_hdr **hdr_pp,
> - const struct libcfs_ioctl_hdr __user *uparam);
> -int libcfs_ioctl_data_adjust(struct libcfs_ioctl_data *data);
> -
> #define _LIBCFS_H
>
> /**
> diff --git a/drivers/staging/lustre/lnet/libcfs/Makefile b/drivers/staging/lustre/lnet/libcfs/Makefile
> index e6fda27fdabd..e73515789a11 100644
> --- a/drivers/staging/lustre/lnet/libcfs/Makefile
> +++ b/drivers/staging/lustre/lnet/libcfs/Makefile
> @@ -5,7 +5,6 @@ subdir-ccflags-y += -I$(srctree)/drivers/staging/lustre/lustre/include
> obj-$(CONFIG_LNET) += libcfs.o
>
> libcfs-linux-objs := linux-tracefile.o linux-debug.o
> -libcfs-linux-objs += linux-module.o
> libcfs-linux-objs += linux-crypto.o
> libcfs-linux-objs += linux-crypto-adler.o
>
> diff --git a/drivers/staging/lustre/lnet/libcfs/linux/linux-module.c b/drivers/staging/lustre/lnet/libcfs/linux/linux-module.c
> deleted file mode 100644
> index 954b681f9db7..000000000000
> --- a/drivers/staging/lustre/lnet/libcfs/linux/linux-module.c
> +++ /dev/null
> @@ -1,168 +0,0 @@
> -// SPDX-License-Identifier: GPL-2.0
> -/*
> - * GPL HEADER START
> - *
> - * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
> - *
> - * This program is free software; you can redistribute it and/or modify
> - * it under the terms of the GNU General Public License version 2 only,
> - * as published by the Free Software Foundation.
> - *
> - * This program is distributed in the hope that it will be useful, but
> - * WITHOUT ANY WARRANTY; without even the implied warranty of
> - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> - * General Public License version 2 for more details (a copy is included
> - * in the LICENSE file that accompanied this code).
> - *
> - * You should have received a copy of the GNU General Public License
> - * version 2 along with this program; If not, see
> - * http://www.gnu.org/licenses/gpl-2.0.html
> - *
> - * GPL HEADER END
> - */
> -/*
> - * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
> - * Use is subject to license terms.
> - *
> - * Copyright (c) 2012, Intel Corporation.
> - */
> -/*
> - * This file is part of Lustre, http://www.lustre.org/
> - * Lustre is a trademark of Sun Microsystems, Inc.
> - */
> -
> -#define DEBUG_SUBSYSTEM S_LNET
> -
> -#include <linux/miscdevice.h>
> -#include <linux/libcfs/libcfs.h>
> -
> -static inline size_t libcfs_ioctl_packlen(struct libcfs_ioctl_data *data)
> -{
> - size_t len = sizeof(*data);
> -
> - len += cfs_size_round(data->ioc_inllen1);
> - len += cfs_size_round(data->ioc_inllen2);
> - return len;
> -}
> -
> -static inline bool libcfs_ioctl_is_invalid(struct libcfs_ioctl_data *data)
> -{
> - if (data->ioc_hdr.ioc_len > BIT(30)) {
> - CERROR("LIBCFS ioctl: ioc_len larger than 1<<30\n");
> - return true;
> - }
> - if (data->ioc_inllen1 > BIT(30)) {
> - CERROR("LIBCFS ioctl: ioc_inllen1 larger than 1<<30\n");
> - return true;
> - }
> - if (data->ioc_inllen2 > BIT(30)) {
> - CERROR("LIBCFS ioctl: ioc_inllen2 larger than 1<<30\n");
> - return true;
> - }
> - if (data->ioc_inlbuf1 && !data->ioc_inllen1) {
> - CERROR("LIBCFS ioctl: inlbuf1 pointer but 0 length\n");
> - return true;
> - }
> - if (data->ioc_inlbuf2 && !data->ioc_inllen2) {
> - CERROR("LIBCFS ioctl: inlbuf2 pointer but 0 length\n");
> - return true;
> - }
> - if (data->ioc_pbuf1 && !data->ioc_plen1) {
> - CERROR("LIBCFS ioctl: pbuf1 pointer but 0 length\n");
> - return true;
> - }
> - if (data->ioc_pbuf2 && !data->ioc_plen2) {
> - CERROR("LIBCFS ioctl: pbuf2 pointer but 0 length\n");
> - return true;
> - }
> - if (data->ioc_plen1 && !data->ioc_pbuf1) {
> - CERROR("LIBCFS ioctl: plen1 nonzero but no pbuf1 pointer\n");
> - return true;
> - }
> - if (data->ioc_plen2 && !data->ioc_pbuf2) {
> - CERROR("LIBCFS ioctl: plen2 nonzero but no pbuf2 pointer\n");
> - return true;
> - }
> - if ((u32)libcfs_ioctl_packlen(data) != data->ioc_hdr.ioc_len) {
> - CERROR("LIBCFS ioctl: packlen != ioc_len\n");
> - return true;
> - }
> - if (data->ioc_inllen1 &&
> - data->ioc_bulk[data->ioc_inllen1 - 1] != '\0') {
> - CERROR("LIBCFS ioctl: inlbuf1 not 0 terminated\n");
> - return true;
> - }
> - if (data->ioc_inllen2 &&
> - data->ioc_bulk[cfs_size_round(data->ioc_inllen1) +
> - data->ioc_inllen2 - 1] != '\0') {
> - CERROR("LIBCFS ioctl: inlbuf2 not 0 terminated\n");
> - return true;
> - }
> - return false;
> -}
> -
> -int libcfs_ioctl_data_adjust(struct libcfs_ioctl_data *data)
> -{
> - if (libcfs_ioctl_is_invalid(data)) {
> - CERROR("libcfs ioctl: parameter not correctly formatted\n");
> - return -EINVAL;
> - }
> -
> - if (data->ioc_inllen1)
> - data->ioc_inlbuf1 = &data->ioc_bulk[0];
> -
> - if (data->ioc_inllen2)
> - data->ioc_inlbuf2 = &data->ioc_bulk[0] +
> - cfs_size_round(data->ioc_inllen1);
> -
> - return 0;
> -}
> -
> -int libcfs_ioctl_getdata(struct libcfs_ioctl_hdr **hdr_pp,
> - const struct libcfs_ioctl_hdr __user *uhdr)
> -{
> - struct libcfs_ioctl_hdr hdr;
> - int err;
> -
> - if (copy_from_user(&hdr, uhdr, sizeof(hdr)))
> - return -EFAULT;
> -
> - if (hdr.ioc_version != LIBCFS_IOCTL_VERSION &&
> - hdr.ioc_version != LIBCFS_IOCTL_VERSION2) {
> - CERROR("libcfs ioctl: version mismatch expected %#x, got %#x\n",
> - LIBCFS_IOCTL_VERSION, hdr.ioc_version);
> - return -EINVAL;
> - }
> -
> - if (hdr.ioc_len < sizeof(hdr)) {
> - CERROR("libcfs ioctl: user buffer too small for ioctl\n");
> - return -EINVAL;
> - }
> -
> - if (hdr.ioc_len > LIBCFS_IOC_DATA_MAX) {
> - CERROR("libcfs ioctl: user buffer is too large %d/%d\n",
> - hdr.ioc_len, LIBCFS_IOC_DATA_MAX);
> - return -EINVAL;
> - }
> -
> - *hdr_pp = kvmalloc(hdr.ioc_len, GFP_KERNEL);
> - if (!*hdr_pp)
> - return -ENOMEM;
> -
> - if (copy_from_user(*hdr_pp, uhdr, hdr.ioc_len)) {
> - err = -EFAULT;
> - goto free;
> - }
> -
> - if ((*hdr_pp)->ioc_version != hdr.ioc_version ||
> - (*hdr_pp)->ioc_len != hdr.ioc_len) {
> - err = -EINVAL;
> - goto free;
> - }
> -
> - return 0;
> -
> -free:
> - kvfree(*hdr_pp);
> - return err;
> -}
> diff --git a/drivers/staging/lustre/lnet/libcfs/module.c b/drivers/staging/lustre/lnet/libcfs/module.c
> index 3fb150a57f49..4c4bf09a78dd 100644
> --- a/drivers/staging/lustre/lnet/libcfs/module.c
> +++ b/drivers/staging/lustre/lnet/libcfs/module.c
> @@ -95,6 +95,137 @@ int libcfs_deregister_ioctl(struct libcfs_ioctl_handler *hand)
> }
> EXPORT_SYMBOL(libcfs_deregister_ioctl);
>
> +static inline size_t libcfs_ioctl_packlen(struct libcfs_ioctl_data *data)
> +{
> + size_t len = sizeof(*data);
> +
> + len += cfs_size_round(data->ioc_inllen1);
> + len += cfs_size_round(data->ioc_inllen2);
> + return len;
> +}
> +
> +static inline bool libcfs_ioctl_is_invalid(struct libcfs_ioctl_data *data)
> +{
> + if (data->ioc_hdr.ioc_len > BIT(30)) {
> + CERROR("LIBCFS ioctl: ioc_len larger than 1<<30\n");
> + return true;
> + }
> + if (data->ioc_inllen1 > BIT(30)) {
> + CERROR("LIBCFS ioctl: ioc_inllen1 larger than 1<<30\n");
> + return true;
> + }
> + if (data->ioc_inllen2 > BIT(30)) {
> + CERROR("LIBCFS ioctl: ioc_inllen2 larger than 1<<30\n");
> + return true;
> + }
> + if (data->ioc_inlbuf1 && !data->ioc_inllen1) {
> + CERROR("LIBCFS ioctl: inlbuf1 pointer but 0 length\n");
> + return true;
> + }
> + if (data->ioc_inlbuf2 && !data->ioc_inllen2) {
> + CERROR("LIBCFS ioctl: inlbuf2 pointer but 0 length\n");
> + return true;
> + }
> + if (data->ioc_pbuf1 && !data->ioc_plen1) {
> + CERROR("LIBCFS ioctl: pbuf1 pointer but 0 length\n");
> + return true;
> + }
> + if (data->ioc_pbuf2 && !data->ioc_plen2) {
> + CERROR("LIBCFS ioctl: pbuf2 pointer but 0 length\n");
> + return true;
> + }
> + if (data->ioc_plen1 && !data->ioc_pbuf1) {
> + CERROR("LIBCFS ioctl: plen1 nonzero but no pbuf1 pointer\n");
> + return true;
> + }
> + if (data->ioc_plen2 && !data->ioc_pbuf2) {
> + CERROR("LIBCFS ioctl: plen2 nonzero but no pbuf2 pointer\n");
> + return true;
> + }
> + if ((u32)libcfs_ioctl_packlen(data) != data->ioc_hdr.ioc_len) {
> + CERROR("LIBCFS ioctl: packlen != ioc_len\n");
> + return true;
> + }
> + if (data->ioc_inllen1 &&
> + data->ioc_bulk[data->ioc_inllen1 - 1] != '\0') {
> + CERROR("LIBCFS ioctl: inlbuf1 not 0 terminated\n");
> + return true;
> + }
> + if (data->ioc_inllen2 &&
> + data->ioc_bulk[cfs_size_round(data->ioc_inllen1) +
> + data->ioc_inllen2 - 1] != '\0') {
> + CERROR("LIBCFS ioctl: inlbuf2 not 0 terminated\n");
> + return true;
> + }
> + return false;
> +}
> +
> +static int libcfs_ioctl_data_adjust(struct libcfs_ioctl_data *data)
> +{
> + if (libcfs_ioctl_is_invalid(data)) {
> + CERROR("libcfs ioctl: parameter not correctly formatted\n");
> + return -EINVAL;
> + }
> +
> + if (data->ioc_inllen1)
> + data->ioc_inlbuf1 = &data->ioc_bulk[0];
> +
> + if (data->ioc_inllen2)
> + data->ioc_inlbuf2 = &data->ioc_bulk[0] +
> + cfs_size_round(data->ioc_inllen1);
> +
> + return 0;
> +}
> +
> +static int libcfs_ioctl_getdata(struct libcfs_ioctl_hdr **hdr_pp,
> + const struct libcfs_ioctl_hdr __user *uhdr)
> +{
> + struct libcfs_ioctl_hdr hdr;
> + int err;
> +
> + if (copy_from_user(&hdr, uhdr, sizeof(hdr)))
> + return -EFAULT;
> +
> + if (hdr.ioc_version != LIBCFS_IOCTL_VERSION &&
> + hdr.ioc_version != LIBCFS_IOCTL_VERSION2) {
> + CERROR("libcfs ioctl: version mismatch expected %#x, got %#x\n",
> + LIBCFS_IOCTL_VERSION, hdr.ioc_version);
> + return -EINVAL;
> + }
> +
> + if (hdr.ioc_len < sizeof(hdr)) {
> + CERROR("libcfs ioctl: user buffer too small for ioctl\n");
> + return -EINVAL;
> + }
> +
> + if (hdr.ioc_len > LIBCFS_IOC_DATA_MAX) {
> + CERROR("libcfs ioctl: user buffer is too large %d/%d\n",
> + hdr.ioc_len, LIBCFS_IOC_DATA_MAX);
> + return -EINVAL;
> + }
> +
> + *hdr_pp = kvmalloc(hdr.ioc_len, GFP_KERNEL);
> + if (!*hdr_pp)
> + return -ENOMEM;
> +
> + if (copy_from_user(*hdr_pp, uhdr, hdr.ioc_len)) {
> + err = -EFAULT;
> + goto free;
> + }
> +
> + if ((*hdr_pp)->ioc_version != hdr.ioc_version ||
> + (*hdr_pp)->ioc_len != hdr.ioc_len) {
> + err = -EINVAL;
> + goto free;
> + }
> +
> + return 0;
> +
> +free:
> + kvfree(*hdr_pp);
> + return err;
> +}
> +
> static int libcfs_ioctl(unsigned long cmd, void __user *uparam)
> {
> struct libcfs_ioctl_data *data = NULL;
>
>
>

Next message: Ilya Dryomov: "[PATCH 1/2] iov_iter: fix return type of __pipe_get_pages()"
Previous message: James Simmons: "Re: [PATCH 08/10] staging: lustre: move misc-device registration closer to related code."
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