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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>
518 lines
13 KiB
C
518 lines
13 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* IPWireless 3G PCMCIA Network Driver
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*
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* Original code
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* by Stephen Blackheath <stephen@blacksapphire.com>,
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* Ben Martel <benm@symmetric.co.nz>
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*
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* Copyrighted as follows:
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* Copyright (C) 2004 by Symmetric Systems Ltd (NZ)
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*
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* Various driver changes and rewrites, port to new kernels
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* Copyright (C) 2006-2007 Jiri Kosina
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*
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* Misc code cleanups and updates
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* Copyright (C) 2007 David Sterba
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*/
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#include <linux/interrupt.h>
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#include <linux/kernel.h>
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#include <linux/mutex.h>
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#include <linux/netdevice.h>
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#include <linux/ppp_channel.h>
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#include <linux/ppp_defs.h>
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#include <linux/slab.h>
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#include <linux/ppp-ioctl.h>
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#include <linux/skbuff.h>
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#include "network.h"
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#include "hardware.h"
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#include "main.h"
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#include "tty.h"
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#define MAX_ASSOCIATED_TTYS 2
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#define SC_RCV_BITS (SC_RCV_B7_1|SC_RCV_B7_0|SC_RCV_ODDP|SC_RCV_EVNP)
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struct ipw_network {
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/* Hardware context, used for calls to hardware layer. */
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struct ipw_hardware *hardware;
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/* Context for kernel 'generic_ppp' functionality */
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struct ppp_channel *ppp_channel;
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/* tty context connected with IPW console */
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struct ipw_tty *associated_ttys[NO_OF_IPW_CHANNELS][MAX_ASSOCIATED_TTYS];
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/* True if ppp needs waking up once we're ready to xmit */
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int ppp_blocked;
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/* Number of packets queued up in hardware module. */
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int outgoing_packets_queued;
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/* Spinlock to avoid interrupts during shutdown */
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spinlock_t lock;
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struct mutex close_lock;
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/* PPP ioctl data, not actually used anywere */
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unsigned int flags;
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unsigned int rbits;
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u32 xaccm[8];
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u32 raccm;
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int mru;
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int shutting_down;
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unsigned int ras_control_lines;
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struct work_struct work_go_online;
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struct work_struct work_go_offline;
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};
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static void notify_packet_sent(void *callback_data, unsigned int packet_length)
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{
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struct ipw_network *network = callback_data;
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unsigned long flags;
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spin_lock_irqsave(&network->lock, flags);
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network->outgoing_packets_queued--;
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if (network->ppp_channel != NULL) {
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if (network->ppp_blocked) {
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network->ppp_blocked = 0;
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spin_unlock_irqrestore(&network->lock, flags);
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ppp_output_wakeup(network->ppp_channel);
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if (ipwireless_debug)
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printk(KERN_DEBUG IPWIRELESS_PCCARD_NAME
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": ppp unblocked\n");
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} else
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spin_unlock_irqrestore(&network->lock, flags);
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} else
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spin_unlock_irqrestore(&network->lock, flags);
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}
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/*
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* Called by the ppp system when it has a packet to send to the hardware.
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*/
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static int ipwireless_ppp_start_xmit(struct ppp_channel *ppp_channel,
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struct sk_buff *skb)
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{
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struct ipw_network *network = ppp_channel->private;
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unsigned long flags;
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spin_lock_irqsave(&network->lock, flags);
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if (network->outgoing_packets_queued < ipwireless_out_queue) {
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unsigned char *buf;
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static unsigned char header[] = {
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PPP_ALLSTATIONS, /* 0xff */
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PPP_UI, /* 0x03 */
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};
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int ret;
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network->outgoing_packets_queued++;
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spin_unlock_irqrestore(&network->lock, flags);
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/*
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* If we have the requested amount of headroom in the skb we
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* were handed, then we can add the header efficiently.
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*/
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if (skb_headroom(skb) >= 2) {
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memcpy(skb_push(skb, 2), header, 2);
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ret = ipwireless_send_packet(network->hardware,
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IPW_CHANNEL_RAS, skb->data,
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skb->len,
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notify_packet_sent,
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network);
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if (ret == -1) {
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skb_pull(skb, 2);
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return 0;
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}
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} else {
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/* Otherwise (rarely) we do it inefficiently. */
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buf = kmalloc(skb->len + 2, GFP_ATOMIC);
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if (!buf)
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return 0;
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memcpy(buf + 2, skb->data, skb->len);
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memcpy(buf, header, 2);
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ret = ipwireless_send_packet(network->hardware,
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IPW_CHANNEL_RAS, buf,
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skb->len + 2,
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notify_packet_sent,
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network);
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kfree(buf);
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if (ret == -1)
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return 0;
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}
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kfree_skb(skb);
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return 1;
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} else {
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/*
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* Otherwise reject the packet, and flag that the ppp system
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* needs to be unblocked once we are ready to send.
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*/
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network->ppp_blocked = 1;
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spin_unlock_irqrestore(&network->lock, flags);
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if (ipwireless_debug)
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printk(KERN_DEBUG IPWIRELESS_PCCARD_NAME ": ppp blocked\n");
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return 0;
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}
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}
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/* Handle an ioctl call that has come in via ppp. (copy of ppp_async_ioctl() */
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static int ipwireless_ppp_ioctl(struct ppp_channel *ppp_channel,
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unsigned int cmd, unsigned long arg)
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{
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struct ipw_network *network = ppp_channel->private;
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int err, val;
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u32 accm[8];
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int __user *user_arg = (int __user *) arg;
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err = -EFAULT;
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switch (cmd) {
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case PPPIOCGFLAGS:
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val = network->flags | network->rbits;
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if (put_user(val, user_arg))
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break;
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err = 0;
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break;
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case PPPIOCSFLAGS:
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if (get_user(val, user_arg))
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break;
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network->flags = val & ~SC_RCV_BITS;
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network->rbits = val & SC_RCV_BITS;
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err = 0;
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break;
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case PPPIOCGASYNCMAP:
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if (put_user(network->xaccm[0], user_arg))
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break;
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err = 0;
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break;
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case PPPIOCSASYNCMAP:
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if (get_user(network->xaccm[0], user_arg))
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break;
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err = 0;
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break;
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case PPPIOCGRASYNCMAP:
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if (put_user(network->raccm, user_arg))
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break;
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err = 0;
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break;
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case PPPIOCSRASYNCMAP:
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if (get_user(network->raccm, user_arg))
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break;
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err = 0;
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break;
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case PPPIOCGXASYNCMAP:
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if (copy_to_user((void __user *) arg, network->xaccm,
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sizeof(network->xaccm)))
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break;
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err = 0;
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break;
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case PPPIOCSXASYNCMAP:
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if (copy_from_user(accm, (void __user *) arg, sizeof(accm)))
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break;
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accm[2] &= ~0x40000000U; /* can't escape 0x5e */
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accm[3] |= 0x60000000U; /* must escape 0x7d, 0x7e */
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memcpy(network->xaccm, accm, sizeof(network->xaccm));
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err = 0;
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break;
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case PPPIOCGMRU:
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if (put_user(network->mru, user_arg))
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break;
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err = 0;
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break;
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case PPPIOCSMRU:
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if (get_user(val, user_arg))
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break;
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if (val < PPP_MRU)
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val = PPP_MRU;
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network->mru = val;
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err = 0;
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break;
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default:
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err = -ENOTTY;
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}
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return err;
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}
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static const struct ppp_channel_ops ipwireless_ppp_channel_ops = {
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.start_xmit = ipwireless_ppp_start_xmit,
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.ioctl = ipwireless_ppp_ioctl
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};
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static void do_go_online(struct work_struct *work_go_online)
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{
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struct ipw_network *network =
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container_of(work_go_online, struct ipw_network,
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work_go_online);
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unsigned long flags;
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spin_lock_irqsave(&network->lock, flags);
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if (!network->ppp_channel) {
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struct ppp_channel *channel;
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spin_unlock_irqrestore(&network->lock, flags);
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channel = kzalloc(sizeof(struct ppp_channel), GFP_KERNEL);
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if (!channel) {
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printk(KERN_ERR IPWIRELESS_PCCARD_NAME
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": unable to allocate PPP channel\n");
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return;
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}
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channel->private = network;
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channel->mtu = 16384; /* Wild guess */
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channel->hdrlen = 2;
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channel->ops = &ipwireless_ppp_channel_ops;
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network->flags = 0;
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network->rbits = 0;
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network->mru = PPP_MRU;
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memset(network->xaccm, 0, sizeof(network->xaccm));
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network->xaccm[0] = ~0U;
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network->xaccm[3] = 0x60000000U;
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network->raccm = ~0U;
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if (ppp_register_channel(channel) < 0) {
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printk(KERN_ERR IPWIRELESS_PCCARD_NAME
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": unable to register PPP channel\n");
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kfree(channel);
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return;
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}
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spin_lock_irqsave(&network->lock, flags);
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network->ppp_channel = channel;
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}
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spin_unlock_irqrestore(&network->lock, flags);
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}
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static void do_go_offline(struct work_struct *work_go_offline)
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{
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struct ipw_network *network =
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container_of(work_go_offline, struct ipw_network,
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work_go_offline);
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unsigned long flags;
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mutex_lock(&network->close_lock);
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spin_lock_irqsave(&network->lock, flags);
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if (network->ppp_channel != NULL) {
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struct ppp_channel *channel = network->ppp_channel;
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network->ppp_channel = NULL;
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spin_unlock_irqrestore(&network->lock, flags);
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mutex_unlock(&network->close_lock);
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ppp_unregister_channel(channel);
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} else {
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spin_unlock_irqrestore(&network->lock, flags);
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mutex_unlock(&network->close_lock);
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}
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}
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void ipwireless_network_notify_control_line_change(struct ipw_network *network,
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unsigned int channel_idx,
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unsigned int control_lines,
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unsigned int changed_mask)
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{
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int i;
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if (channel_idx == IPW_CHANNEL_RAS)
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network->ras_control_lines = control_lines;
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for (i = 0; i < MAX_ASSOCIATED_TTYS; i++) {
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struct ipw_tty *tty =
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network->associated_ttys[channel_idx][i];
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/*
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* If it's associated with a tty (other than the RAS channel
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* when we're online), then send the data to that tty. The RAS
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* channel's data is handled above - it always goes through
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* ppp_generic.
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*/
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if (tty)
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ipwireless_tty_notify_control_line_change(tty,
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channel_idx,
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control_lines,
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changed_mask);
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}
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}
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/*
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* Some versions of firmware stuff packets with 0xff 0x03 (PPP: ALLSTATIONS, UI)
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* bytes, which are required on sent packet, but not always present on received
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* packets
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*/
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static struct sk_buff *ipw_packet_received_skb(unsigned char *data,
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unsigned int length)
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{
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struct sk_buff *skb;
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if (length > 2 && data[0] == PPP_ALLSTATIONS && data[1] == PPP_UI) {
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length -= 2;
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data += 2;
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}
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skb = dev_alloc_skb(length + 4);
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if (skb == NULL)
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return NULL;
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skb_reserve(skb, 2);
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skb_put_data(skb, data, length);
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return skb;
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}
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void ipwireless_network_packet_received(struct ipw_network *network,
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unsigned int channel_idx,
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unsigned char *data,
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unsigned int length)
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{
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int i;
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unsigned long flags;
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for (i = 0; i < MAX_ASSOCIATED_TTYS; i++) {
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struct ipw_tty *tty = network->associated_ttys[channel_idx][i];
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if (!tty)
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continue;
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/*
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* If it's associated with a tty (other than the RAS channel
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* when we're online), then send the data to that tty. The RAS
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* channel's data is handled above - it always goes through
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* ppp_generic.
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*/
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if (channel_idx == IPW_CHANNEL_RAS
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&& (network->ras_control_lines &
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IPW_CONTROL_LINE_DCD) != 0
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&& ipwireless_tty_is_modem(tty)) {
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/*
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* If data came in on the RAS channel and this tty is
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* the modem tty, and we are online, then we send it to
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* the PPP layer.
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*/
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mutex_lock(&network->close_lock);
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spin_lock_irqsave(&network->lock, flags);
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if (network->ppp_channel != NULL) {
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struct sk_buff *skb;
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spin_unlock_irqrestore(&network->lock,
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flags);
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/* Send the data to the ppp_generic module. */
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skb = ipw_packet_received_skb(data, length);
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if (skb)
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ppp_input(network->ppp_channel, skb);
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} else
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spin_unlock_irqrestore(&network->lock,
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flags);
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mutex_unlock(&network->close_lock);
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}
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/* Otherwise we send it out the tty. */
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else
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ipwireless_tty_received(tty, data, length);
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}
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}
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struct ipw_network *ipwireless_network_create(struct ipw_hardware *hw)
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{
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struct ipw_network *network =
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kzalloc(sizeof(struct ipw_network), GFP_ATOMIC);
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if (!network)
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return NULL;
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spin_lock_init(&network->lock);
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mutex_init(&network->close_lock);
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network->hardware = hw;
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INIT_WORK(&network->work_go_online, do_go_online);
|
|
INIT_WORK(&network->work_go_offline, do_go_offline);
|
|
|
|
ipwireless_associate_network(hw, network);
|
|
|
|
return network;
|
|
}
|
|
|
|
void ipwireless_network_free(struct ipw_network *network)
|
|
{
|
|
network->shutting_down = 1;
|
|
|
|
ipwireless_ppp_close(network);
|
|
flush_work(&network->work_go_online);
|
|
flush_work(&network->work_go_offline);
|
|
|
|
ipwireless_stop_interrupts(network->hardware);
|
|
ipwireless_associate_network(network->hardware, NULL);
|
|
|
|
kfree(network);
|
|
}
|
|
|
|
void ipwireless_associate_network_tty(struct ipw_network *network,
|
|
unsigned int channel_idx,
|
|
struct ipw_tty *tty)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < MAX_ASSOCIATED_TTYS; i++)
|
|
if (network->associated_ttys[channel_idx][i] == NULL) {
|
|
network->associated_ttys[channel_idx][i] = tty;
|
|
break;
|
|
}
|
|
}
|
|
|
|
void ipwireless_disassociate_network_ttys(struct ipw_network *network,
|
|
unsigned int channel_idx)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < MAX_ASSOCIATED_TTYS; i++)
|
|
network->associated_ttys[channel_idx][i] = NULL;
|
|
}
|
|
|
|
void ipwireless_ppp_open(struct ipw_network *network)
|
|
{
|
|
if (ipwireless_debug)
|
|
printk(KERN_DEBUG IPWIRELESS_PCCARD_NAME ": online\n");
|
|
schedule_work(&network->work_go_online);
|
|
}
|
|
|
|
void ipwireless_ppp_close(struct ipw_network *network)
|
|
{
|
|
/* Disconnect from the wireless network. */
|
|
if (ipwireless_debug)
|
|
printk(KERN_DEBUG IPWIRELESS_PCCARD_NAME ": offline\n");
|
|
schedule_work(&network->work_go_offline);
|
|
}
|
|
|
|
int ipwireless_ppp_channel_index(struct ipw_network *network)
|
|
{
|
|
int ret = -1;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&network->lock, flags);
|
|
if (network->ppp_channel != NULL)
|
|
ret = ppp_channel_index(network->ppp_channel);
|
|
spin_unlock_irqrestore(&network->lock, flags);
|
|
|
|
return ret;
|
|
}
|
|
|
|
int ipwireless_ppp_unit_number(struct ipw_network *network)
|
|
{
|
|
int ret = -1;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&network->lock, flags);
|
|
if (network->ppp_channel != NULL)
|
|
ret = ppp_unit_number(network->ppp_channel);
|
|
spin_unlock_irqrestore(&network->lock, flags);
|
|
|
|
return ret;
|
|
}
|
|
|
|
int ipwireless_ppp_mru(const struct ipw_network *network)
|
|
{
|
|
return network->mru;
|
|
}
|