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![Greg Kroah-Hartman](/assets/img/avatar_default.png)
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>
217 lines
6.6 KiB
C
217 lines
6.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* linux/include/linux/sunrpc/svc_xprt.h
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*
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* RPC server transport I/O
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*/
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#ifndef SUNRPC_SVC_XPRT_H
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#define SUNRPC_SVC_XPRT_H
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#include <linux/sunrpc/svc.h>
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struct module;
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struct svc_xprt_ops {
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struct svc_xprt *(*xpo_create)(struct svc_serv *,
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struct net *net,
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struct sockaddr *, int,
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int);
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struct svc_xprt *(*xpo_accept)(struct svc_xprt *);
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int (*xpo_has_wspace)(struct svc_xprt *);
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int (*xpo_recvfrom)(struct svc_rqst *);
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void (*xpo_prep_reply_hdr)(struct svc_rqst *);
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int (*xpo_sendto)(struct svc_rqst *);
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void (*xpo_release_rqst)(struct svc_rqst *);
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void (*xpo_detach)(struct svc_xprt *);
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void (*xpo_free)(struct svc_xprt *);
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int (*xpo_secure_port)(struct svc_rqst *);
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void (*xpo_kill_temp_xprt)(struct svc_xprt *);
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};
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struct svc_xprt_class {
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const char *xcl_name;
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struct module *xcl_owner;
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const struct svc_xprt_ops *xcl_ops;
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struct list_head xcl_list;
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u32 xcl_max_payload;
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int xcl_ident;
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};
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/*
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* This is embedded in an object that wants a callback before deleting
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* an xprt; intended for use by NFSv4.1, which needs to know when a
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* client's tcp connection (and hence possibly a backchannel) goes away.
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*/
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struct svc_xpt_user {
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struct list_head list;
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void (*callback)(struct svc_xpt_user *);
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};
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struct svc_xprt {
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struct svc_xprt_class *xpt_class;
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const struct svc_xprt_ops *xpt_ops;
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struct kref xpt_ref;
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struct list_head xpt_list;
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struct list_head xpt_ready;
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unsigned long xpt_flags;
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#define XPT_BUSY 0 /* enqueued/receiving */
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#define XPT_CONN 1 /* conn pending */
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#define XPT_CLOSE 2 /* dead or dying */
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#define XPT_DATA 3 /* data pending */
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#define XPT_TEMP 4 /* connected transport */
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#define XPT_DEAD 6 /* transport closed */
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#define XPT_CHNGBUF 7 /* need to change snd/rcv buf sizes */
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#define XPT_DEFERRED 8 /* deferred request pending */
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#define XPT_OLD 9 /* used for xprt aging mark+sweep */
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#define XPT_LISTENER 10 /* listening endpoint */
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#define XPT_CACHE_AUTH 11 /* cache auth info */
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#define XPT_LOCAL 12 /* connection from loopback interface */
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#define XPT_KILL_TEMP 13 /* call xpo_kill_temp_xprt before closing */
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#define XPT_CONG_CTRL 14 /* has congestion control */
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struct svc_serv *xpt_server; /* service for transport */
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atomic_t xpt_reserved; /* space on outq that is rsvd */
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atomic_t xpt_nr_rqsts; /* Number of requests */
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struct mutex xpt_mutex; /* to serialize sending data */
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spinlock_t xpt_lock; /* protects sk_deferred
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* and xpt_auth_cache */
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void *xpt_auth_cache;/* auth cache */
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struct list_head xpt_deferred; /* deferred requests that need
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* to be revisted */
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struct sockaddr_storage xpt_local; /* local address */
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size_t xpt_locallen; /* length of address */
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struct sockaddr_storage xpt_remote; /* remote peer's address */
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size_t xpt_remotelen; /* length of address */
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struct rpc_wait_queue xpt_bc_pending; /* backchannel wait queue */
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struct list_head xpt_users; /* callbacks on free */
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struct net *xpt_net;
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struct rpc_xprt *xpt_bc_xprt; /* NFSv4.1 backchannel */
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struct rpc_xprt_switch *xpt_bc_xps; /* NFSv4.1 backchannel */
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};
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static inline void unregister_xpt_user(struct svc_xprt *xpt, struct svc_xpt_user *u)
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{
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spin_lock(&xpt->xpt_lock);
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list_del_init(&u->list);
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spin_unlock(&xpt->xpt_lock);
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}
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static inline int register_xpt_user(struct svc_xprt *xpt, struct svc_xpt_user *u)
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{
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spin_lock(&xpt->xpt_lock);
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if (test_bit(XPT_CLOSE, &xpt->xpt_flags)) {
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/*
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* The connection is about to be deleted soon (or,
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* worse, may already be deleted--in which case we've
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* already notified the xpt_users).
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*/
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spin_unlock(&xpt->xpt_lock);
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return -ENOTCONN;
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}
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list_add(&u->list, &xpt->xpt_users);
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spin_unlock(&xpt->xpt_lock);
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return 0;
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}
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int svc_reg_xprt_class(struct svc_xprt_class *);
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void svc_unreg_xprt_class(struct svc_xprt_class *);
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void svc_xprt_init(struct net *, struct svc_xprt_class *, struct svc_xprt *,
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struct svc_serv *);
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int svc_create_xprt(struct svc_serv *, const char *, struct net *,
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const int, const unsigned short, int);
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void svc_xprt_do_enqueue(struct svc_xprt *xprt);
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void svc_xprt_enqueue(struct svc_xprt *xprt);
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void svc_xprt_put(struct svc_xprt *xprt);
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void svc_xprt_copy_addrs(struct svc_rqst *rqstp, struct svc_xprt *xprt);
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void svc_close_xprt(struct svc_xprt *xprt);
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int svc_port_is_privileged(struct sockaddr *sin);
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int svc_print_xprts(char *buf, int maxlen);
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struct svc_xprt *svc_find_xprt(struct svc_serv *serv, const char *xcl_name,
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struct net *net, const sa_family_t af,
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const unsigned short port);
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int svc_xprt_names(struct svc_serv *serv, char *buf, const int buflen);
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void svc_add_new_perm_xprt(struct svc_serv *serv, struct svc_xprt *xprt);
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void svc_age_temp_xprts_now(struct svc_serv *, struct sockaddr *);
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static inline void svc_xprt_get(struct svc_xprt *xprt)
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{
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kref_get(&xprt->xpt_ref);
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}
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static inline void svc_xprt_set_local(struct svc_xprt *xprt,
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const struct sockaddr *sa,
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const size_t salen)
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{
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memcpy(&xprt->xpt_local, sa, salen);
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xprt->xpt_locallen = salen;
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}
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static inline void svc_xprt_set_remote(struct svc_xprt *xprt,
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const struct sockaddr *sa,
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const size_t salen)
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{
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memcpy(&xprt->xpt_remote, sa, salen);
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xprt->xpt_remotelen = salen;
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}
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static inline unsigned short svc_addr_port(const struct sockaddr *sa)
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{
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const struct sockaddr_in *sin = (const struct sockaddr_in *)sa;
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const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6 *)sa;
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switch (sa->sa_family) {
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case AF_INET:
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return ntohs(sin->sin_port);
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case AF_INET6:
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return ntohs(sin6->sin6_port);
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}
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return 0;
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}
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static inline size_t svc_addr_len(const struct sockaddr *sa)
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{
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switch (sa->sa_family) {
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case AF_INET:
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return sizeof(struct sockaddr_in);
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case AF_INET6:
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return sizeof(struct sockaddr_in6);
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}
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BUG();
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}
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static inline unsigned short svc_xprt_local_port(const struct svc_xprt *xprt)
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{
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return svc_addr_port((const struct sockaddr *)&xprt->xpt_local);
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}
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static inline unsigned short svc_xprt_remote_port(const struct svc_xprt *xprt)
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{
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return svc_addr_port((const struct sockaddr *)&xprt->xpt_remote);
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}
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static inline char *__svc_print_addr(const struct sockaddr *addr,
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char *buf, const size_t len)
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{
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const struct sockaddr_in *sin = (const struct sockaddr_in *)addr;
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const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6 *)addr;
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switch (addr->sa_family) {
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case AF_INET:
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snprintf(buf, len, "%pI4, port=%u", &sin->sin_addr,
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ntohs(sin->sin_port));
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break;
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case AF_INET6:
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snprintf(buf, len, "%pI6, port=%u",
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&sin6->sin6_addr,
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ntohs(sin6->sin6_port));
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break;
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default:
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snprintf(buf, len, "unknown address type: %d", addr->sa_family);
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break;
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}
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return buf;
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}
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#endif /* SUNRPC_SVC_XPRT_H */
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