![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>
206 lines
5.3 KiB
C
206 lines
5.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __NX_H__
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#define __NX_H__
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#include <crypto/ctr.h>
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#define NX_NAME "nx-crypto"
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#define NX_STRING "IBM Power7+ Nest Accelerator Crypto Driver"
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#define NX_VERSION "1.0"
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static const char nx_driver_string[] = NX_STRING;
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static const char nx_driver_version[] = NX_VERSION;
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/* a scatterlist in the format PHYP is expecting */
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struct nx_sg {
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u64 addr;
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u32 rsvd;
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u32 len;
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} __attribute((packed));
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#define NX_PAGE_SIZE (4096)
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#define NX_MAX_SG_ENTRIES (NX_PAGE_SIZE/(sizeof(struct nx_sg)))
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enum nx_status {
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NX_DISABLED,
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NX_WAITING,
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NX_OKAY
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};
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/* msc_triplet and max_sync_cop are used only to assist in parsing the
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* openFirmware property */
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struct msc_triplet {
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u32 keybitlen;
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u32 databytelen;
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u32 sglen;
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} __packed;
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struct max_sync_cop {
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u32 fc;
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u32 mode;
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u32 triplets;
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struct msc_triplet trip[0];
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} __packed;
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struct alg_props {
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u32 databytelen;
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u32 sglen;
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};
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#define NX_OF_FLAG_MAXSGLEN_SET (1)
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#define NX_OF_FLAG_STATUS_SET (2)
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#define NX_OF_FLAG_MAXSYNCCOP_SET (4)
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#define NX_OF_FLAG_MASK_READY (NX_OF_FLAG_MAXSGLEN_SET | \
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NX_OF_FLAG_STATUS_SET | \
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NX_OF_FLAG_MAXSYNCCOP_SET)
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struct nx_of {
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u32 flags;
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u32 max_sg_len;
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enum nx_status status;
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struct alg_props ap[NX_MAX_FC][NX_MAX_MODE][3];
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};
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struct nx_stats {
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atomic_t aes_ops;
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atomic64_t aes_bytes;
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atomic_t sha256_ops;
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atomic64_t sha256_bytes;
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atomic_t sha512_ops;
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atomic64_t sha512_bytes;
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atomic_t sync_ops;
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atomic_t errors;
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atomic_t last_error;
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atomic_t last_error_pid;
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};
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struct nx_debugfs {
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struct dentry *dfs_root;
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struct dentry *dfs_aes_ops, *dfs_aes_bytes;
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struct dentry *dfs_sha256_ops, *dfs_sha256_bytes;
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struct dentry *dfs_sha512_ops, *dfs_sha512_bytes;
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struct dentry *dfs_errors, *dfs_last_error, *dfs_last_error_pid;
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};
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struct nx_crypto_driver {
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struct nx_stats stats;
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struct nx_of of;
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struct vio_dev *viodev;
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struct vio_driver viodriver;
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struct nx_debugfs dfs;
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};
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#define NX_GCM4106_NONCE_LEN (4)
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#define NX_GCM_CTR_OFFSET (12)
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struct nx_gcm_rctx {
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u8 iv[16];
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};
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struct nx_gcm_priv {
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u8 iauth_tag[16];
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u8 nonce[NX_GCM4106_NONCE_LEN];
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};
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#define NX_CCM_AES_KEY_LEN (16)
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#define NX_CCM4309_AES_KEY_LEN (19)
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#define NX_CCM4309_NONCE_LEN (3)
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struct nx_ccm_rctx {
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u8 iv[16];
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};
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struct nx_ccm_priv {
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u8 b0[16];
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u8 iauth_tag[16];
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u8 oauth_tag[16];
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u8 nonce[NX_CCM4309_NONCE_LEN];
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};
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struct nx_xcbc_priv {
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u8 key[16];
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};
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struct nx_ctr_priv {
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u8 nonce[CTR_RFC3686_NONCE_SIZE];
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};
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struct nx_crypto_ctx {
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spinlock_t lock; /* synchronize access to the context */
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void *kmem; /* unaligned, kmalloc'd buffer */
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size_t kmem_len; /* length of kmem */
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struct nx_csbcpb *csbcpb; /* aligned page given to phyp @ hcall time */
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struct vio_pfo_op op; /* operation struct with hcall parameters */
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struct nx_csbcpb *csbcpb_aead; /* secondary csbcpb used by AEAD algs */
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struct vio_pfo_op op_aead;/* operation struct for csbcpb_aead */
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struct nx_sg *in_sg; /* aligned pointer into kmem to an sg list */
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struct nx_sg *out_sg; /* aligned pointer into kmem to an sg list */
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struct alg_props *ap; /* pointer into props based on our key size */
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struct alg_props props[3];/* openFirmware properties for requests */
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struct nx_stats *stats; /* pointer into an nx_crypto_driver for stats
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reporting */
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union {
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struct nx_gcm_priv gcm;
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struct nx_ccm_priv ccm;
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struct nx_xcbc_priv xcbc;
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struct nx_ctr_priv ctr;
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} priv;
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};
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struct crypto_aead;
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/* prototypes */
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int nx_crypto_ctx_aes_ccm_init(struct crypto_aead *tfm);
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int nx_crypto_ctx_aes_gcm_init(struct crypto_aead *tfm);
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int nx_crypto_ctx_aes_xcbc_init(struct crypto_tfm *tfm);
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int nx_crypto_ctx_aes_ctr_init(struct crypto_tfm *tfm);
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int nx_crypto_ctx_aes_cbc_init(struct crypto_tfm *tfm);
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int nx_crypto_ctx_aes_ecb_init(struct crypto_tfm *tfm);
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int nx_crypto_ctx_sha_init(struct crypto_tfm *tfm);
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void nx_crypto_ctx_exit(struct crypto_tfm *tfm);
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void nx_crypto_ctx_aead_exit(struct crypto_aead *tfm);
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void nx_ctx_init(struct nx_crypto_ctx *nx_ctx, unsigned int function);
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int nx_hcall_sync(struct nx_crypto_ctx *ctx, struct vio_pfo_op *op,
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u32 may_sleep);
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struct nx_sg *nx_build_sg_list(struct nx_sg *, u8 *, unsigned int *, u32);
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int nx_build_sg_lists(struct nx_crypto_ctx *, struct blkcipher_desc *,
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struct scatterlist *, struct scatterlist *, unsigned int *,
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unsigned int, u8 *);
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struct nx_sg *nx_walk_and_build(struct nx_sg *, unsigned int,
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struct scatterlist *, unsigned int,
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unsigned int *);
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#ifdef CONFIG_DEBUG_FS
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#define NX_DEBUGFS_INIT(drv) nx_debugfs_init(drv)
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#define NX_DEBUGFS_FINI(drv) nx_debugfs_fini(drv)
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int nx_debugfs_init(struct nx_crypto_driver *);
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void nx_debugfs_fini(struct nx_crypto_driver *);
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#else
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#define NX_DEBUGFS_INIT(drv) (0)
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#define NX_DEBUGFS_FINI(drv) (0)
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#endif
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#define NX_PAGE_NUM(x) ((u64)(x) & 0xfffffffffffff000ULL)
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extern struct crypto_alg nx_cbc_aes_alg;
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extern struct crypto_alg nx_ecb_aes_alg;
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extern struct aead_alg nx_gcm_aes_alg;
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extern struct aead_alg nx_gcm4106_aes_alg;
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extern struct crypto_alg nx_ctr3686_aes_alg;
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extern struct aead_alg nx_ccm_aes_alg;
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extern struct aead_alg nx_ccm4309_aes_alg;
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extern struct shash_alg nx_shash_aes_xcbc_alg;
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extern struct shash_alg nx_shash_sha512_alg;
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extern struct shash_alg nx_shash_sha256_alg;
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extern struct nx_crypto_driver nx_driver;
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#define SCATTERWALK_TO_SG 1
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#define SCATTERWALK_FROM_SG 0
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#endif
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