License cleanup: add SPDX GPL-2.0 license identifier to files with no license
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>
2017-11-01 22:07:57 +08:00
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/* SPDX-License-Identifier: GPL-2.0 */
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2017-01-09 23:55:14 +08:00
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/*
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* Shared Memory Communications over RDMA (SMC-R) and RoCE
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*
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* Definitions for IB environment
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*
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* Copyright IBM Corp. 2016
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*
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* Author(s): Ursula Braun <Ursula Braun@linux.vnet.ibm.com>
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*/
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#ifndef _SMC_IB_H
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#define _SMC_IB_H
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2017-03-29 23:17:31 +08:00
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#include <linux/interrupt.h>
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2017-01-12 21:57:15 +08:00
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#include <linux/if_ether.h>
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2020-07-08 23:05:13 +08:00
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#include <linux/mutex.h>
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2019-11-17 00:47:29 +08:00
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#include <linux/wait.h>
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2017-01-09 23:55:14 +08:00
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#include <rdma/ib_verbs.h>
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2018-06-29 01:05:05 +08:00
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#include <net/smc.h>
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2017-01-09 23:55:14 +08:00
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#define SMC_MAX_PORTS 2 /* Max # of ports */
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#define SMC_GID_SIZE sizeof(union ib_gid)
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2017-01-09 23:55:19 +08:00
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#define SMC_IB_MAX_SEND_SGE 2
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2017-01-09 23:55:14 +08:00
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struct smc_ib_devices { /* list of smc ib devices definition */
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struct list_head list;
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2020-07-08 23:05:13 +08:00
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struct mutex mutex; /* protects list of smc ib devices */
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2017-01-09 23:55:14 +08:00
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};
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extern struct smc_ib_devices smc_ib_devices; /* list of smc ib devices */
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2020-12-02 03:20:49 +08:00
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extern struct smc_lgr_list smc_lgr_list; /* list of linkgroups */
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2017-01-09 23:55:14 +08:00
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struct smc_ib_device { /* ib-device infos for smc */
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struct list_head list;
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struct ib_device *ibdev;
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struct ib_port_attr pattr[SMC_MAX_PORTS]; /* ib dev. port attrs */
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2017-01-09 23:55:20 +08:00
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struct ib_event_handler event_handler; /* global ib_event handler */
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2017-01-09 23:55:19 +08:00
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struct ib_cq *roce_cq_send; /* send completion queue */
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struct ib_cq *roce_cq_recv; /* recv completion queue */
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struct tasklet_struct send_tasklet; /* called by send cq handler */
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struct tasklet_struct recv_tasklet; /* called by recv cq handler */
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2017-01-12 21:57:15 +08:00
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char mac[SMC_MAX_PORTS][ETH_ALEN];
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/* mac address per port*/
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2018-06-29 01:05:05 +08:00
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u8 pnetid[SMC_MAX_PORTS][SMC_MAX_PNETID_LEN];
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/* pnetid per port */
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2019-02-21 20:01:00 +08:00
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bool pnetid_by_user[SMC_MAX_PORTS];
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/* pnetid defined by user? */
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2017-01-09 23:55:14 +08:00
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u8 initialized : 1; /* ib dev CQ, evthdl done */
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2017-01-09 23:55:20 +08:00
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struct work_struct port_event_work;
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unsigned long port_event_mask;
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2019-10-09 16:07:46 +08:00
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DECLARE_BITMAP(ports_going_away, SMC_MAX_PORTS);
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2019-11-17 00:47:29 +08:00
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atomic_t lnk_cnt; /* number of links on ibdev */
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wait_queue_head_t lnks_deleted; /* wait 4 removal of all links*/
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2020-07-18 21:06:12 +08:00
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struct mutex mutex; /* protect dev setup+cleanup */
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2020-12-02 03:20:39 +08:00
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atomic_t lnk_cnt_by_port[SMC_MAX_PORTS];
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/* number of links per port */
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2020-12-02 03:20:40 +08:00
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int ndev_ifidx[SMC_MAX_PORTS]; /* ndev if indexes */
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2017-01-09 23:55:14 +08:00
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};
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2021-10-16 17:37:45 +08:00
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static inline __be32 smc_ib_gid_to_ipv4(u8 gid[SMC_GID_SIZE])
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{
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struct in6_addr *addr6 = (struct in6_addr *)gid;
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if (ipv6_addr_v4mapped(addr6) ||
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!(addr6->s6_addr32[0] | addr6->s6_addr32[1] | addr6->s6_addr32[2]))
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return addr6->s6_addr32[3];
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return cpu_to_be32(INADDR_NONE);
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}
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2021-12-28 21:06:09 +08:00
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static inline struct net *smc_ib_net(struct smc_ib_device *smcibdev)
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{
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if (smcibdev && smcibdev->ibdev)
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return read_pnet(&smcibdev->ibdev->coredev.rdma_net);
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return NULL;
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}
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2021-10-16 17:37:45 +08:00
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struct smc_init_info_smcrv2;
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2017-01-09 23:55:18 +08:00
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struct smc_buf_desc;
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2017-01-09 23:55:19 +08:00
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struct smc_link;
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2017-01-09 23:55:18 +08:00
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2020-12-02 03:20:40 +08:00
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void smc_ib_ndev_change(struct net_device *ndev, unsigned long event);
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2017-01-09 23:55:14 +08:00
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int smc_ib_register_client(void) __init;
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void smc_ib_unregister_client(void);
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bool smc_ib_port_active(struct smc_ib_device *smcibdev, u8 ibport);
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2020-04-29 23:10:40 +08:00
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int smc_ib_buf_map_sg(struct smc_link *lnk,
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2017-07-28 19:56:15 +08:00
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struct smc_buf_desc *buf_slot,
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enum dma_data_direction data_direction);
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2020-04-29 23:10:40 +08:00
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void smc_ib_buf_unmap_sg(struct smc_link *lnk,
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2017-07-28 19:56:15 +08:00
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struct smc_buf_desc *buf_slot,
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enum dma_data_direction data_direction);
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2017-01-09 23:55:19 +08:00
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void smc_ib_dealloc_protection_domain(struct smc_link *lnk);
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int smc_ib_create_protection_domain(struct smc_link *lnk);
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void smc_ib_destroy_queue_pair(struct smc_link *lnk);
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int smc_ib_create_queue_pair(struct smc_link *lnk);
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2017-01-09 23:55:20 +08:00
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int smc_ib_ready_link(struct smc_link *lnk);
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int smc_ib_modify_qp_rts(struct smc_link *lnk);
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int smc_ib_modify_qp_reset(struct smc_link *lnk);
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net/smc: fix kernel panic caused by race of smc_sock
A crash occurs when smc_cdc_tx_handler() tries to access smc_sock
but smc_release() has already freed it.
[ 4570.695099] BUG: unable to handle page fault for address: 000000002eae9e88
[ 4570.696048] #PF: supervisor write access in kernel mode
[ 4570.696728] #PF: error_code(0x0002) - not-present page
[ 4570.697401] PGD 0 P4D 0
[ 4570.697716] Oops: 0002 [#1] PREEMPT SMP NOPTI
[ 4570.698228] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.16.0-rc4+ #111
[ 4570.699013] Hardware name: Alibaba Cloud Alibaba Cloud ECS, BIOS 8c24b4c 04/0
[ 4570.699933] RIP: 0010:_raw_spin_lock+0x1a/0x30
<...>
[ 4570.711446] Call Trace:
[ 4570.711746] <IRQ>
[ 4570.711992] smc_cdc_tx_handler+0x41/0xc0
[ 4570.712470] smc_wr_tx_tasklet_fn+0x213/0x560
[ 4570.712981] ? smc_cdc_tx_dismisser+0x10/0x10
[ 4570.713489] tasklet_action_common.isra.17+0x66/0x140
[ 4570.714083] __do_softirq+0x123/0x2f4
[ 4570.714521] irq_exit_rcu+0xc4/0xf0
[ 4570.714934] common_interrupt+0xba/0xe0
Though smc_cdc_tx_handler() checked the existence of smc connection,
smc_release() may have already dismissed and released the smc socket
before smc_cdc_tx_handler() further visits it.
smc_cdc_tx_handler() |smc_release()
if (!conn) |
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|smc_cdc_tx_dismiss_slots()
| smc_cdc_tx_dismisser()
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|sock_put(&smc->sk) <- last sock_put,
| smc_sock freed
bh_lock_sock(&smc->sk) (panic) |
To make sure we won't receive any CDC messages after we free the
smc_sock, add a refcount on the smc_connection for inflight CDC
message(posted to the QP but haven't received related CQE), and
don't release the smc_connection until all the inflight CDC messages
haven been done, for both success or failed ones.
Using refcount on CDC messages brings another problem: when the link
is going to be destroyed, smcr_link_clear() will reset the QP, which
then remove all the pending CQEs related to the QP in the CQ. To make
sure all the CQEs will always come back so the refcount on the
smc_connection can always reach 0, smc_ib_modify_qp_reset() was replaced
by smc_ib_modify_qp_error().
And remove the timeout in smc_wr_tx_wait_no_pending_sends() since we
need to wait for all pending WQEs done, or we may encounter use-after-
free when handling CQEs.
For IB device removal routine, we need to wait for all the QPs on that
device been destroyed before we can destroy CQs on the device, or
the refcount on smc_connection won't reach 0 and smc_sock cannot be
released.
Fixes: 5f08318f617b ("smc: connection data control (CDC)")
Reported-by: Wen Gu <guwen@linux.alibaba.com>
Signed-off-by: Dust Li <dust.li@linux.alibaba.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2021-12-28 17:03:25 +08:00
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int smc_ib_modify_qp_error(struct smc_link *lnk);
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2017-01-09 23:55:20 +08:00
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long smc_ib_setup_per_ibdev(struct smc_ib_device *smcibdev);
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2017-07-28 19:56:16 +08:00
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int smc_ib_get_memory_region(struct ib_pd *pd, int access_flags,
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2020-04-29 23:10:40 +08:00
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struct smc_buf_desc *buf_slot, u8 link_idx);
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2017-07-28 19:56:16 +08:00
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void smc_ib_put_memory_region(struct ib_mr *mr);
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2020-04-29 23:10:40 +08:00
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void smc_ib_sync_sg_for_cpu(struct smc_link *lnk,
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2017-07-28 19:56:22 +08:00
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struct smc_buf_desc *buf_slot,
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enum dma_data_direction data_direction);
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2020-04-29 23:10:40 +08:00
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void smc_ib_sync_sg_for_device(struct smc_link *lnk,
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2017-07-28 19:56:22 +08:00
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struct smc_buf_desc *buf_slot,
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enum dma_data_direction data_direction);
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2018-07-25 22:35:31 +08:00
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int smc_ib_determine_gid(struct smc_ib_device *smcibdev, u8 ibport,
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2021-10-16 17:37:48 +08:00
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unsigned short vlan_id, u8 gid[], u8 *sgid_index,
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struct smc_init_info_smcrv2 *smcrv2);
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2021-10-16 17:37:45 +08:00
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int smc_ib_find_route(__be32 saddr, __be32 daddr,
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u8 nexthop_mac[], u8 *uses_gateway);
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2020-02-26 05:41:22 +08:00
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bool smc_ib_is_valid_local_systemid(void);
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2020-12-02 03:20:49 +08:00
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int smcr_nl_get_device(struct sk_buff *skb, struct netlink_callback *cb);
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2017-01-09 23:55:14 +08:00
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#endif
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