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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>
360 lines
9.6 KiB
C
360 lines
9.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _SCSI_SCSI_CMND_H
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#define _SCSI_SCSI_CMND_H
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#include <linux/dma-mapping.h>
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#include <linux/blkdev.h>
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#include <linux/list.h>
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#include <linux/types.h>
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#include <linux/timer.h>
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#include <linux/scatterlist.h>
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#include <scsi/scsi_device.h>
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#include <scsi/scsi_request.h>
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struct Scsi_Host;
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struct scsi_driver;
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#include <scsi/scsi_device.h>
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/*
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* MAX_COMMAND_SIZE is:
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* The longest fixed-length SCSI CDB as per the SCSI standard.
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* fixed-length means: commands that their size can be determined
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* by their opcode and the CDB does not carry a length specifier, (unlike
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* the VARIABLE_LENGTH_CMD(0x7f) command). This is actually not exactly
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* true and the SCSI standard also defines extended commands and
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* vendor specific commands that can be bigger than 16 bytes. The kernel
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* will support these using the same infrastructure used for VARLEN CDB's.
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* So in effect MAX_COMMAND_SIZE means the maximum size command scsi-ml
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* supports without specifying a cmd_len by ULD's
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*/
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#define MAX_COMMAND_SIZE 16
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#if (MAX_COMMAND_SIZE > BLK_MAX_CDB)
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# error MAX_COMMAND_SIZE can not be bigger than BLK_MAX_CDB
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#endif
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struct scsi_data_buffer {
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struct sg_table table;
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unsigned length;
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int resid;
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};
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/* embedded in scsi_cmnd */
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struct scsi_pointer {
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char *ptr; /* data pointer */
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int this_residual; /* left in this buffer */
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struct scatterlist *buffer; /* which buffer */
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int buffers_residual; /* how many buffers left */
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dma_addr_t dma_handle;
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volatile int Status;
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volatile int Message;
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volatile int have_data_in;
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volatile int sent_command;
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volatile int phase;
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};
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/* for scmd->flags */
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#define SCMD_TAGGED (1 << 0)
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#define SCMD_UNCHECKED_ISA_DMA (1 << 1)
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#define SCMD_ZONE_WRITE_LOCK (1 << 2)
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#define SCMD_INITIALIZED (1 << 3)
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/* flags preserved across unprep / reprep */
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#define SCMD_PRESERVED_FLAGS (SCMD_UNCHECKED_ISA_DMA | SCMD_INITIALIZED)
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struct scsi_cmnd {
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struct scsi_request req;
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struct scsi_device *device;
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struct list_head list; /* scsi_cmnd participates in queue lists */
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struct list_head eh_entry; /* entry for the host eh_cmd_q */
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struct delayed_work abort_work;
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int eh_eflags; /* Used by error handlr */
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/*
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* A SCSI Command is assigned a nonzero serial_number before passed
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* to the driver's queue command function. The serial_number is
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* cleared when scsi_done is entered indicating that the command
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* has been completed. It is a bug for LLDDs to use this number
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* for purposes other than printk (and even that is only useful
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* for debugging).
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*/
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unsigned long serial_number;
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/*
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* This is set to jiffies as it was when the command was first
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* allocated. It is used to time how long the command has
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* been outstanding
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*/
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unsigned long jiffies_at_alloc;
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int retries;
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int allowed;
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unsigned char prot_op;
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unsigned char prot_type;
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unsigned char prot_flags;
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unsigned short cmd_len;
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enum dma_data_direction sc_data_direction;
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/* These elements define the operation we are about to perform */
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unsigned char *cmnd;
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/* These elements define the operation we ultimately want to perform */
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struct scsi_data_buffer sdb;
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struct scsi_data_buffer *prot_sdb;
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unsigned underflow; /* Return error if less than
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this amount is transferred */
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unsigned transfersize; /* How much we are guaranteed to
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transfer with each SCSI transfer
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(ie, between disconnect /
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reconnects. Probably == sector
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size */
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struct request *request; /* The command we are
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working on */
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#define SCSI_SENSE_BUFFERSIZE 96
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unsigned char *sense_buffer;
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/* obtained by REQUEST SENSE when
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* CHECK CONDITION is received on original
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* command (auto-sense) */
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/* Low-level done function - can be used by low-level driver to point
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* to completion function. Not used by mid/upper level code. */
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void (*scsi_done) (struct scsi_cmnd *);
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/*
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* The following fields can be written to by the host specific code.
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* Everything else should be left alone.
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*/
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struct scsi_pointer SCp; /* Scratchpad used by some host adapters */
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unsigned char *host_scribble; /* The host adapter is allowed to
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* call scsi_malloc and get some memory
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* and hang it here. The host adapter
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* is also expected to call scsi_free
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* to release this memory. (The memory
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* obtained by scsi_malloc is guaranteed
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* to be at an address < 16Mb). */
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int result; /* Status code from lower level driver */
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int flags; /* Command flags */
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unsigned char tag; /* SCSI-II queued command tag */
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};
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/*
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* Return the driver private allocation behind the command.
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* Only works if cmd_size is set in the host template.
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*/
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static inline void *scsi_cmd_priv(struct scsi_cmnd *cmd)
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{
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return cmd + 1;
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}
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/* make sure not to use it with passthrough commands */
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static inline struct scsi_driver *scsi_cmd_to_driver(struct scsi_cmnd *cmd)
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{
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return *(struct scsi_driver **)cmd->request->rq_disk->private_data;
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}
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extern void scsi_put_command(struct scsi_cmnd *);
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extern void scsi_finish_command(struct scsi_cmnd *cmd);
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extern void *scsi_kmap_atomic_sg(struct scatterlist *sg, int sg_count,
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size_t *offset, size_t *len);
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extern void scsi_kunmap_atomic_sg(void *virt);
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extern int scsi_init_io(struct scsi_cmnd *cmd);
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extern void scsi_initialize_rq(struct request *rq);
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extern int scsi_dma_map(struct scsi_cmnd *cmd);
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extern void scsi_dma_unmap(struct scsi_cmnd *cmd);
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static inline unsigned scsi_sg_count(struct scsi_cmnd *cmd)
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{
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return cmd->sdb.table.nents;
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}
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static inline struct scatterlist *scsi_sglist(struct scsi_cmnd *cmd)
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{
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return cmd->sdb.table.sgl;
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}
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static inline unsigned scsi_bufflen(struct scsi_cmnd *cmd)
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{
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return cmd->sdb.length;
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}
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static inline void scsi_set_resid(struct scsi_cmnd *cmd, int resid)
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{
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cmd->sdb.resid = resid;
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}
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static inline int scsi_get_resid(struct scsi_cmnd *cmd)
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{
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return cmd->sdb.resid;
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}
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#define scsi_for_each_sg(cmd, sg, nseg, __i) \
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for_each_sg(scsi_sglist(cmd), sg, nseg, __i)
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static inline int scsi_bidi_cmnd(struct scsi_cmnd *cmd)
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{
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return blk_bidi_rq(cmd->request) &&
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(cmd->request->next_rq->special != NULL);
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}
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static inline struct scsi_data_buffer *scsi_in(struct scsi_cmnd *cmd)
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{
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return scsi_bidi_cmnd(cmd) ?
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cmd->request->next_rq->special : &cmd->sdb;
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}
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static inline struct scsi_data_buffer *scsi_out(struct scsi_cmnd *cmd)
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{
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return &cmd->sdb;
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}
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static inline int scsi_sg_copy_from_buffer(struct scsi_cmnd *cmd,
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void *buf, int buflen)
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{
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return sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd),
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buf, buflen);
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}
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static inline int scsi_sg_copy_to_buffer(struct scsi_cmnd *cmd,
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void *buf, int buflen)
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{
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return sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd),
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buf, buflen);
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}
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/*
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* The operations below are hints that tell the controller driver how
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* to handle I/Os with DIF or similar types of protection information.
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*/
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enum scsi_prot_operations {
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/* Normal I/O */
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SCSI_PROT_NORMAL = 0,
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/* OS-HBA: Protected, HBA-Target: Unprotected */
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SCSI_PROT_READ_INSERT,
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SCSI_PROT_WRITE_STRIP,
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/* OS-HBA: Unprotected, HBA-Target: Protected */
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SCSI_PROT_READ_STRIP,
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SCSI_PROT_WRITE_INSERT,
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/* OS-HBA: Protected, HBA-Target: Protected */
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SCSI_PROT_READ_PASS,
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SCSI_PROT_WRITE_PASS,
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};
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static inline void scsi_set_prot_op(struct scsi_cmnd *scmd, unsigned char op)
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{
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scmd->prot_op = op;
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}
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static inline unsigned char scsi_get_prot_op(struct scsi_cmnd *scmd)
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{
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return scmd->prot_op;
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}
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enum scsi_prot_flags {
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SCSI_PROT_TRANSFER_PI = 1 << 0,
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SCSI_PROT_GUARD_CHECK = 1 << 1,
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SCSI_PROT_REF_CHECK = 1 << 2,
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SCSI_PROT_REF_INCREMENT = 1 << 3,
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SCSI_PROT_IP_CHECKSUM = 1 << 4,
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};
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/*
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* The controller usually does not know anything about the target it
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* is communicating with. However, when DIX is enabled the controller
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* must be know target type so it can verify the protection
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* information passed along with the I/O.
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*/
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enum scsi_prot_target_type {
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SCSI_PROT_DIF_TYPE0 = 0,
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SCSI_PROT_DIF_TYPE1,
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SCSI_PROT_DIF_TYPE2,
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SCSI_PROT_DIF_TYPE3,
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};
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static inline void scsi_set_prot_type(struct scsi_cmnd *scmd, unsigned char type)
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{
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scmd->prot_type = type;
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}
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static inline unsigned char scsi_get_prot_type(struct scsi_cmnd *scmd)
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{
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return scmd->prot_type;
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}
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static inline sector_t scsi_get_lba(struct scsi_cmnd *scmd)
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{
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return blk_rq_pos(scmd->request);
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}
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static inline unsigned int scsi_prot_interval(struct scsi_cmnd *scmd)
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{
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return scmd->device->sector_size;
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}
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static inline u32 scsi_prot_ref_tag(struct scsi_cmnd *scmd)
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{
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return blk_rq_pos(scmd->request) >>
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(ilog2(scsi_prot_interval(scmd)) - 9) & 0xffffffff;
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}
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static inline unsigned scsi_prot_sg_count(struct scsi_cmnd *cmd)
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{
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return cmd->prot_sdb ? cmd->prot_sdb->table.nents : 0;
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}
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static inline struct scatterlist *scsi_prot_sglist(struct scsi_cmnd *cmd)
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{
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return cmd->prot_sdb ? cmd->prot_sdb->table.sgl : NULL;
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}
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static inline struct scsi_data_buffer *scsi_prot(struct scsi_cmnd *cmd)
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{
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return cmd->prot_sdb;
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}
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#define scsi_for_each_prot_sg(cmd, sg, nseg, __i) \
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for_each_sg(scsi_prot_sglist(cmd), sg, nseg, __i)
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static inline void set_msg_byte(struct scsi_cmnd *cmd, char status)
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{
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cmd->result = (cmd->result & 0xffff00ff) | (status << 8);
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}
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static inline void set_host_byte(struct scsi_cmnd *cmd, char status)
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{
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cmd->result = (cmd->result & 0xff00ffff) | (status << 16);
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}
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static inline void set_driver_byte(struct scsi_cmnd *cmd, char status)
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{
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cmd->result = (cmd->result & 0x00ffffff) | (status << 24);
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}
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static inline unsigned scsi_transfer_length(struct scsi_cmnd *scmd)
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{
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unsigned int xfer_len = scsi_out(scmd)->length;
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unsigned int prot_interval = scsi_prot_interval(scmd);
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if (scmd->prot_flags & SCSI_PROT_TRANSFER_PI)
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xfer_len += (xfer_len >> ilog2(prot_interval)) * 8;
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return xfer_len;
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}
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#endif /* _SCSI_SCSI_CMND_H */
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