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https://github.com/edk2-porting/linux-next.git
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b24413180f
Many source files in the tree are missing licensing information, which makes it harder for compliance tools to determine the correct license. By default all files without license information are under the default license of the kernel, which is GPL version 2. Update the files which contain no license information with the 'GPL-2.0' SPDX license identifier. The SPDX identifier is a legally binding shorthand, which can be used instead of the full boiler plate text. This patch is based on work done by Thomas Gleixner and Kate Stewart and Philippe Ombredanne. How this work was done: Patches were generated and checked against linux-4.14-rc6 for a subset of the use cases: - file had no licensing information it it. - file was a */uapi/* one with no licensing information in it, - file was a */uapi/* one with existing licensing information, Further patches will be generated in subsequent months to fix up cases where non-standard license headers were used, and references to license had to be inferred by heuristics based on keywords. The analysis to determine which SPDX License Identifier to be applied to a file was done in a spreadsheet of side by side results from of the output of two independent scanners (ScanCode & Windriver) producing SPDX tag:value files created by Philippe Ombredanne. Philippe prepared the base worksheet, and did an initial spot review of a few 1000 files. The 4.13 kernel was the starting point of the analysis with 60,537 files assessed. Kate Stewart did a file by file comparison of the scanner results in the spreadsheet to determine which SPDX license identifier(s) to be applied to the file. She confirmed any determination that was not immediately clear with lawyers working with the Linux Foundation. Criteria used to select files for SPDX license identifier tagging was: - Files considered eligible had to be source code files. - Make and config files were included as candidates if they contained >5 lines of source - File already had some variant of a license header in it (even if <5 lines). All documentation files were explicitly excluded. The following heuristics were used to determine which SPDX license identifiers to apply. - when both scanners couldn't find any license traces, file was considered to have no license information in it, and the top level COPYING file license applied. For non */uapi/* files that summary was: SPDX license identifier # files ---------------------------------------------------|------- GPL-2.0 11139 and resulted in the first patch in this series. If that file was a */uapi/* path one, it was "GPL-2.0 WITH Linux-syscall-note" otherwise it was "GPL-2.0". Results of that was: SPDX license identifier # files ---------------------------------------------------|------- GPL-2.0 WITH Linux-syscall-note 930 and resulted in the second patch in this series. - if a file had some form of licensing information in it, and was one of the */uapi/* ones, it was denoted with the Linux-syscall-note if any GPL family license was found in the file or had no licensing in it (per prior point). Results summary: SPDX license identifier # files ---------------------------------------------------|------ GPL-2.0 WITH Linux-syscall-note 270 GPL-2.0+ WITH Linux-syscall-note 169 ((GPL-2.0 WITH Linux-syscall-note) OR BSD-2-Clause) 21 ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) 17 LGPL-2.1+ WITH Linux-syscall-note 15 GPL-1.0+ WITH Linux-syscall-note 14 ((GPL-2.0+ WITH Linux-syscall-note) OR BSD-3-Clause) 5 LGPL-2.0+ WITH Linux-syscall-note 4 LGPL-2.1 WITH Linux-syscall-note 3 ((GPL-2.0 WITH Linux-syscall-note) OR MIT) 3 ((GPL-2.0 WITH Linux-syscall-note) AND MIT) 1 and that resulted in the third patch in this series. - when the two scanners agreed on the detected license(s), that became the concluded license(s). - when there was disagreement between the two scanners (one detected a license but the other didn't, or they both detected different licenses) a manual inspection of the file occurred. - In most cases a manual inspection of the information in the file resulted in a clear resolution of the license that should apply (and which scanner probably needed to revisit its heuristics). - When it was not immediately clear, the license identifier was confirmed with lawyers working with the Linux Foundation. - If there was any question as to the appropriate license identifier, the file was flagged for further research and to be revisited later in time. In total, over 70 hours of logged manual review was done on the spreadsheet to determine the SPDX license identifiers to apply to the source files by Kate, Philippe, Thomas and, in some cases, confirmation by lawyers working with the Linux Foundation. Kate also obtained a third independent scan of the 4.13 code base from FOSSology, and compared selected files where the other two scanners disagreed against that SPDX file, to see if there was new insights. The Windriver scanner is based on an older version of FOSSology in part, so they are related. Thomas did random spot checks in about 500 files from the spreadsheets for the uapi headers and agreed with SPDX license identifier in the files he inspected. For the non-uapi files Thomas did random spot checks in about 15000 files. In initial set of patches against 4.14-rc6, 3 files were found to have copy/paste license identifier errors, and have been fixed to reflect the correct identifier. Additionally Philippe spent 10 hours this week doing a detailed manual inspection and review of the 12,461 patched files from the initial patch version early this week with: - a full scancode scan run, collecting the matched texts, detected license ids and scores - reviewing anything where there was a license detected (about 500+ files) to ensure that the applied SPDX license was correct - reviewing anything where there was no detection but the patch license was not GPL-2.0 WITH Linux-syscall-note to ensure that the applied SPDX license was correct This produced a worksheet with 20 files needing minor correction. This worksheet was then exported into 3 different .csv files for the different types of files to be modified. These .csv files were then reviewed by Greg. Thomas wrote a script to parse the csv files and add the proper SPDX tag to the file, in the format that the file expected. This script was further refined by Greg based on the output to detect more types of files automatically and to distinguish between header and source .c files (which need different comment types.) Finally Greg ran the script using the .csv files to generate the patches. Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
599 lines
13 KiB
C
599 lines
13 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#include <linux/kmod.h>
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#include <linux/netdevice.h>
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#include <linux/etherdevice.h>
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#include <linux/rtnetlink.h>
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#include <linux/net_tstamp.h>
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#include <linux/wireless.h>
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#include <net/wext.h>
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/*
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* Map an interface index to its name (SIOCGIFNAME)
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*/
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/*
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* We need this ioctl for efficient implementation of the
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* if_indextoname() function required by the IPv6 API. Without
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* it, we would have to search all the interfaces to find a
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* match. --pb
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*/
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static int dev_ifname(struct net *net, struct ifreq __user *arg)
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{
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struct ifreq ifr;
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int error;
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/*
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* Fetch the caller's info block.
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*/
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if (copy_from_user(&ifr, arg, sizeof(struct ifreq)))
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return -EFAULT;
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ifr.ifr_name[IFNAMSIZ-1] = 0;
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error = netdev_get_name(net, ifr.ifr_name, ifr.ifr_ifindex);
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if (error)
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return error;
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if (copy_to_user(arg, &ifr, sizeof(struct ifreq)))
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return -EFAULT;
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return 0;
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}
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static gifconf_func_t *gifconf_list[NPROTO];
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/**
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* register_gifconf - register a SIOCGIF handler
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* @family: Address family
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* @gifconf: Function handler
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*
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* Register protocol dependent address dumping routines. The handler
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* that is passed must not be freed or reused until it has been replaced
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* by another handler.
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*/
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int register_gifconf(unsigned int family, gifconf_func_t *gifconf)
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{
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if (family >= NPROTO)
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return -EINVAL;
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gifconf_list[family] = gifconf;
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return 0;
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}
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EXPORT_SYMBOL(register_gifconf);
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/*
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* Perform a SIOCGIFCONF call. This structure will change
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* size eventually, and there is nothing I can do about it.
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* Thus we will need a 'compatibility mode'.
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*/
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static int dev_ifconf(struct net *net, char __user *arg)
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{
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struct ifconf ifc;
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struct net_device *dev;
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char __user *pos;
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int len;
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int total;
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int i;
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/*
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* Fetch the caller's info block.
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*/
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if (copy_from_user(&ifc, arg, sizeof(struct ifconf)))
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return -EFAULT;
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pos = ifc.ifc_buf;
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len = ifc.ifc_len;
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/*
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* Loop over the interfaces, and write an info block for each.
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*/
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total = 0;
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for_each_netdev(net, dev) {
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for (i = 0; i < NPROTO; i++) {
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if (gifconf_list[i]) {
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int done;
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if (!pos)
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done = gifconf_list[i](dev, NULL, 0);
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else
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done = gifconf_list[i](dev, pos + total,
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len - total);
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if (done < 0)
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return -EFAULT;
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total += done;
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}
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}
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}
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/*
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* All done. Write the updated control block back to the caller.
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*/
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ifc.ifc_len = total;
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/*
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* Both BSD and Solaris return 0 here, so we do too.
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*/
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return copy_to_user(arg, &ifc, sizeof(struct ifconf)) ? -EFAULT : 0;
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}
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/*
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* Perform the SIOCxIFxxx calls, inside rcu_read_lock()
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*/
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static int dev_ifsioc_locked(struct net *net, struct ifreq *ifr, unsigned int cmd)
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{
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int err;
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struct net_device *dev = dev_get_by_name_rcu(net, ifr->ifr_name);
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if (!dev)
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return -ENODEV;
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switch (cmd) {
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case SIOCGIFFLAGS: /* Get interface flags */
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ifr->ifr_flags = (short) dev_get_flags(dev);
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return 0;
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case SIOCGIFMETRIC: /* Get the metric on the interface
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(currently unused) */
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ifr->ifr_metric = 0;
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return 0;
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case SIOCGIFMTU: /* Get the MTU of a device */
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ifr->ifr_mtu = dev->mtu;
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return 0;
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case SIOCGIFHWADDR:
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if (!dev->addr_len)
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memset(ifr->ifr_hwaddr.sa_data, 0,
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sizeof(ifr->ifr_hwaddr.sa_data));
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else
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memcpy(ifr->ifr_hwaddr.sa_data, dev->dev_addr,
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min(sizeof(ifr->ifr_hwaddr.sa_data),
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(size_t)dev->addr_len));
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ifr->ifr_hwaddr.sa_family = dev->type;
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return 0;
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case SIOCGIFSLAVE:
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err = -EINVAL;
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break;
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case SIOCGIFMAP:
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ifr->ifr_map.mem_start = dev->mem_start;
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ifr->ifr_map.mem_end = dev->mem_end;
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ifr->ifr_map.base_addr = dev->base_addr;
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ifr->ifr_map.irq = dev->irq;
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ifr->ifr_map.dma = dev->dma;
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ifr->ifr_map.port = dev->if_port;
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return 0;
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case SIOCGIFINDEX:
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ifr->ifr_ifindex = dev->ifindex;
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return 0;
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case SIOCGIFTXQLEN:
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ifr->ifr_qlen = dev->tx_queue_len;
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return 0;
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default:
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/* dev_ioctl() should ensure this case
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* is never reached
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*/
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WARN_ON(1);
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err = -ENOTTY;
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break;
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}
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return err;
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}
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static int net_hwtstamp_validate(struct ifreq *ifr)
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{
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struct hwtstamp_config cfg;
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enum hwtstamp_tx_types tx_type;
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enum hwtstamp_rx_filters rx_filter;
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int tx_type_valid = 0;
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int rx_filter_valid = 0;
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if (copy_from_user(&cfg, ifr->ifr_data, sizeof(cfg)))
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return -EFAULT;
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if (cfg.flags) /* reserved for future extensions */
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return -EINVAL;
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tx_type = cfg.tx_type;
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rx_filter = cfg.rx_filter;
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switch (tx_type) {
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case HWTSTAMP_TX_OFF:
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case HWTSTAMP_TX_ON:
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case HWTSTAMP_TX_ONESTEP_SYNC:
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tx_type_valid = 1;
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break;
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}
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switch (rx_filter) {
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case HWTSTAMP_FILTER_NONE:
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case HWTSTAMP_FILTER_ALL:
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case HWTSTAMP_FILTER_SOME:
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case HWTSTAMP_FILTER_PTP_V1_L4_EVENT:
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case HWTSTAMP_FILTER_PTP_V1_L4_SYNC:
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case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ:
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case HWTSTAMP_FILTER_PTP_V2_L4_EVENT:
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case HWTSTAMP_FILTER_PTP_V2_L4_SYNC:
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case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ:
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case HWTSTAMP_FILTER_PTP_V2_L2_EVENT:
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case HWTSTAMP_FILTER_PTP_V2_L2_SYNC:
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case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ:
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case HWTSTAMP_FILTER_PTP_V2_EVENT:
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case HWTSTAMP_FILTER_PTP_V2_SYNC:
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case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ:
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case HWTSTAMP_FILTER_NTP_ALL:
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rx_filter_valid = 1;
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break;
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}
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if (!tx_type_valid || !rx_filter_valid)
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return -ERANGE;
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return 0;
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}
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/*
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* Perform the SIOCxIFxxx calls, inside rtnl_lock()
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*/
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static int dev_ifsioc(struct net *net, struct ifreq *ifr, unsigned int cmd)
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{
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int err;
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struct net_device *dev = __dev_get_by_name(net, ifr->ifr_name);
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const struct net_device_ops *ops;
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if (!dev)
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return -ENODEV;
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ops = dev->netdev_ops;
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switch (cmd) {
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case SIOCSIFFLAGS: /* Set interface flags */
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return dev_change_flags(dev, ifr->ifr_flags);
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case SIOCSIFMETRIC: /* Set the metric on the interface
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(currently unused) */
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return -EOPNOTSUPP;
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case SIOCSIFMTU: /* Set the MTU of a device */
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return dev_set_mtu(dev, ifr->ifr_mtu);
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case SIOCSIFHWADDR:
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if (dev->addr_len > sizeof(struct sockaddr))
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return -EINVAL;
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return dev_set_mac_address(dev, &ifr->ifr_hwaddr);
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case SIOCSIFHWBROADCAST:
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if (ifr->ifr_hwaddr.sa_family != dev->type)
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return -EINVAL;
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memcpy(dev->broadcast, ifr->ifr_hwaddr.sa_data,
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min(sizeof(ifr->ifr_hwaddr.sa_data),
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(size_t)dev->addr_len));
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call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
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return 0;
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case SIOCSIFMAP:
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if (ops->ndo_set_config) {
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if (!netif_device_present(dev))
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return -ENODEV;
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return ops->ndo_set_config(dev, &ifr->ifr_map);
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}
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return -EOPNOTSUPP;
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case SIOCADDMULTI:
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if (!ops->ndo_set_rx_mode ||
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ifr->ifr_hwaddr.sa_family != AF_UNSPEC)
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return -EINVAL;
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if (!netif_device_present(dev))
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return -ENODEV;
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return dev_mc_add_global(dev, ifr->ifr_hwaddr.sa_data);
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case SIOCDELMULTI:
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if (!ops->ndo_set_rx_mode ||
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ifr->ifr_hwaddr.sa_family != AF_UNSPEC)
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return -EINVAL;
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if (!netif_device_present(dev))
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return -ENODEV;
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return dev_mc_del_global(dev, ifr->ifr_hwaddr.sa_data);
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case SIOCSIFTXQLEN:
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if (ifr->ifr_qlen < 0)
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return -EINVAL;
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if (dev->tx_queue_len ^ ifr->ifr_qlen) {
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unsigned int orig_len = dev->tx_queue_len;
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dev->tx_queue_len = ifr->ifr_qlen;
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err = call_netdevice_notifiers(
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NETDEV_CHANGE_TX_QUEUE_LEN, dev);
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err = notifier_to_errno(err);
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if (err) {
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dev->tx_queue_len = orig_len;
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return err;
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}
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}
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return 0;
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case SIOCSIFNAME:
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ifr->ifr_newname[IFNAMSIZ-1] = '\0';
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return dev_change_name(dev, ifr->ifr_newname);
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case SIOCSHWTSTAMP:
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err = net_hwtstamp_validate(ifr);
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if (err)
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return err;
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/* fall through */
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/*
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* Unknown or private ioctl
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*/
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default:
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if ((cmd >= SIOCDEVPRIVATE &&
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cmd <= SIOCDEVPRIVATE + 15) ||
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cmd == SIOCBONDENSLAVE ||
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cmd == SIOCBONDRELEASE ||
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cmd == SIOCBONDSETHWADDR ||
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cmd == SIOCBONDSLAVEINFOQUERY ||
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cmd == SIOCBONDINFOQUERY ||
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cmd == SIOCBONDCHANGEACTIVE ||
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cmd == SIOCGMIIPHY ||
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cmd == SIOCGMIIREG ||
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cmd == SIOCSMIIREG ||
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cmd == SIOCBRADDIF ||
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cmd == SIOCBRDELIF ||
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cmd == SIOCSHWTSTAMP ||
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cmd == SIOCGHWTSTAMP ||
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cmd == SIOCWANDEV) {
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err = -EOPNOTSUPP;
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if (ops->ndo_do_ioctl) {
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if (netif_device_present(dev))
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err = ops->ndo_do_ioctl(dev, ifr, cmd);
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else
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err = -ENODEV;
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}
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} else
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err = -EINVAL;
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}
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return err;
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}
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/**
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* dev_load - load a network module
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* @net: the applicable net namespace
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* @name: name of interface
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*
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* If a network interface is not present and the process has suitable
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* privileges this function loads the module. If module loading is not
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* available in this kernel then it becomes a nop.
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*/
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void dev_load(struct net *net, const char *name)
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{
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struct net_device *dev;
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int no_module;
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rcu_read_lock();
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dev = dev_get_by_name_rcu(net, name);
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rcu_read_unlock();
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no_module = !dev;
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if (no_module && capable(CAP_NET_ADMIN))
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no_module = request_module("netdev-%s", name);
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if (no_module && capable(CAP_SYS_MODULE))
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request_module("%s", name);
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}
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EXPORT_SYMBOL(dev_load);
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/*
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* This function handles all "interface"-type I/O control requests. The actual
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* 'doing' part of this is dev_ifsioc above.
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*/
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/**
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* dev_ioctl - network device ioctl
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* @net: the applicable net namespace
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* @cmd: command to issue
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* @arg: pointer to a struct ifreq in user space
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*
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* Issue ioctl functions to devices. This is normally called by the
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* user space syscall interfaces but can sometimes be useful for
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* other purposes. The return value is the return from the syscall if
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* positive or a negative errno code on error.
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*/
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int dev_ioctl(struct net *net, unsigned int cmd, void __user *arg)
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{
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struct ifreq ifr;
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int ret;
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char *colon;
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/* One special case: SIOCGIFCONF takes ifconf argument
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and requires shared lock, because it sleeps writing
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to user space.
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*/
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if (cmd == SIOCGIFCONF) {
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rtnl_lock();
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ret = dev_ifconf(net, (char __user *) arg);
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rtnl_unlock();
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return ret;
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}
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if (cmd == SIOCGIFNAME)
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return dev_ifname(net, (struct ifreq __user *)arg);
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/*
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|
* Take care of Wireless Extensions. Unfortunately struct iwreq
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* isn't a proper subset of struct ifreq (it's 8 byte shorter)
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* so we need to treat it specially, otherwise applications may
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* fault if the struct they're passing happens to land at the
|
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* end of a mapped page.
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*/
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if (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST) {
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struct iwreq iwr;
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if (copy_from_user(&iwr, arg, sizeof(iwr)))
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return -EFAULT;
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|
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iwr.ifr_name[sizeof(iwr.ifr_name) - 1] = 0;
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|
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return wext_handle_ioctl(net, &iwr, cmd, arg);
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}
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if (copy_from_user(&ifr, arg, sizeof(struct ifreq)))
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return -EFAULT;
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|
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ifr.ifr_name[IFNAMSIZ-1] = 0;
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colon = strchr(ifr.ifr_name, ':');
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if (colon)
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*colon = 0;
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|
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/*
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* See which interface the caller is talking about.
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|
*/
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|
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switch (cmd) {
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/*
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* These ioctl calls:
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* - can be done by all.
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* - atomic and do not require locking.
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* - return a value
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|
*/
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case SIOCGIFFLAGS:
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case SIOCGIFMETRIC:
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case SIOCGIFMTU:
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case SIOCGIFHWADDR:
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case SIOCGIFSLAVE:
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case SIOCGIFMAP:
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case SIOCGIFINDEX:
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case SIOCGIFTXQLEN:
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dev_load(net, ifr.ifr_name);
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|
rcu_read_lock();
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|
ret = dev_ifsioc_locked(net, &ifr, cmd);
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|
rcu_read_unlock();
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|
if (!ret) {
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if (colon)
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|
*colon = ':';
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|
if (copy_to_user(arg, &ifr,
|
|
sizeof(struct ifreq)))
|
|
ret = -EFAULT;
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|
}
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|
return ret;
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|
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|
case SIOCETHTOOL:
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|
dev_load(net, ifr.ifr_name);
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|
rtnl_lock();
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|
ret = dev_ethtool(net, &ifr);
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|
rtnl_unlock();
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|
if (!ret) {
|
|
if (colon)
|
|
*colon = ':';
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|
if (copy_to_user(arg, &ifr,
|
|
sizeof(struct ifreq)))
|
|
ret = -EFAULT;
|
|
}
|
|
return ret;
|
|
|
|
/*
|
|
* These ioctl calls:
|
|
* - require superuser power.
|
|
* - require strict serialization.
|
|
* - return a value
|
|
*/
|
|
case SIOCGMIIPHY:
|
|
case SIOCGMIIREG:
|
|
case SIOCSIFNAME:
|
|
if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
|
|
return -EPERM;
|
|
dev_load(net, ifr.ifr_name);
|
|
rtnl_lock();
|
|
ret = dev_ifsioc(net, &ifr, cmd);
|
|
rtnl_unlock();
|
|
if (!ret) {
|
|
if (colon)
|
|
*colon = ':';
|
|
if (copy_to_user(arg, &ifr,
|
|
sizeof(struct ifreq)))
|
|
ret = -EFAULT;
|
|
}
|
|
return ret;
|
|
|
|
/*
|
|
* These ioctl calls:
|
|
* - require superuser power.
|
|
* - require strict serialization.
|
|
* - do not return a value
|
|
*/
|
|
case SIOCSIFMAP:
|
|
case SIOCSIFTXQLEN:
|
|
if (!capable(CAP_NET_ADMIN))
|
|
return -EPERM;
|
|
/* fall through */
|
|
/*
|
|
* These ioctl calls:
|
|
* - require local superuser power.
|
|
* - require strict serialization.
|
|
* - do not return a value
|
|
*/
|
|
case SIOCSIFFLAGS:
|
|
case SIOCSIFMETRIC:
|
|
case SIOCSIFMTU:
|
|
case SIOCSIFHWADDR:
|
|
case SIOCSIFSLAVE:
|
|
case SIOCADDMULTI:
|
|
case SIOCDELMULTI:
|
|
case SIOCSIFHWBROADCAST:
|
|
case SIOCSMIIREG:
|
|
case SIOCBONDENSLAVE:
|
|
case SIOCBONDRELEASE:
|
|
case SIOCBONDSETHWADDR:
|
|
case SIOCBONDCHANGEACTIVE:
|
|
case SIOCBRADDIF:
|
|
case SIOCBRDELIF:
|
|
case SIOCSHWTSTAMP:
|
|
if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
|
|
return -EPERM;
|
|
/* fall through */
|
|
case SIOCBONDSLAVEINFOQUERY:
|
|
case SIOCBONDINFOQUERY:
|
|
dev_load(net, ifr.ifr_name);
|
|
rtnl_lock();
|
|
ret = dev_ifsioc(net, &ifr, cmd);
|
|
rtnl_unlock();
|
|
return ret;
|
|
|
|
case SIOCGIFMEM:
|
|
/* Get the per device memory space. We can add this but
|
|
* currently do not support it */
|
|
case SIOCSIFMEM:
|
|
/* Set the per device memory buffer space.
|
|
* Not applicable in our case */
|
|
case SIOCSIFLINK:
|
|
return -ENOTTY;
|
|
|
|
/*
|
|
* Unknown or private ioctl.
|
|
*/
|
|
default:
|
|
if (cmd == SIOCWANDEV ||
|
|
cmd == SIOCGHWTSTAMP ||
|
|
(cmd >= SIOCDEVPRIVATE &&
|
|
cmd <= SIOCDEVPRIVATE + 15)) {
|
|
dev_load(net, ifr.ifr_name);
|
|
rtnl_lock();
|
|
ret = dev_ifsioc(net, &ifr, cmd);
|
|
rtnl_unlock();
|
|
if (!ret && copy_to_user(arg, &ifr,
|
|
sizeof(struct ifreq)))
|
|
ret = -EFAULT;
|
|
return ret;
|
|
}
|
|
return -ENOTTY;
|
|
}
|
|
}
|