^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Synchronous Compression operations
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright 2015 LG Electronics Inc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Copyright (c) 2016, Intel Corporation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Author: Giovanni Cabiddu <giovanni.cabiddu@intel.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/seq_file.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/string.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/crypto.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/compiler.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/vmalloc.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <crypto/algapi.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/cryptouser.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <net/netlink.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <linux/scatterlist.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <crypto/scatterwalk.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include <crypto/internal/acompress.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #include <crypto/internal/scompress.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #include "internal.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) struct scomp_scratch {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) spinlock_t lock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) void *src;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) void *dst;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) static DEFINE_PER_CPU(struct scomp_scratch, scomp_scratch) = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) .lock = __SPIN_LOCK_UNLOCKED(scomp_scratch.lock),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) static const struct crypto_type crypto_scomp_type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) static int scomp_scratch_users;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) static DEFINE_MUTEX(scomp_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) #ifdef CONFIG_NET
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) static int crypto_scomp_report(struct sk_buff *skb, struct crypto_alg *alg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) struct crypto_report_comp rscomp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) memset(&rscomp, 0, sizeof(rscomp));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) strscpy(rscomp.type, "scomp", sizeof(rscomp.type));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) return nla_put(skb, CRYPTOCFGA_REPORT_COMPRESS,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) sizeof(rscomp), &rscomp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) static int crypto_scomp_report(struct sk_buff *skb, struct crypto_alg *alg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) return -ENOSYS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) static void crypto_scomp_show(struct seq_file *m, struct crypto_alg *alg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) __maybe_unused;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) static void crypto_scomp_show(struct seq_file *m, struct crypto_alg *alg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) seq_puts(m, "type : scomp\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) static void crypto_scomp_free_scratches(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) struct scomp_scratch *scratch;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) for_each_possible_cpu(i) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) scratch = per_cpu_ptr(&scomp_scratch, i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) vfree(scratch->src);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) vfree(scratch->dst);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) scratch->src = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) scratch->dst = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) static int crypto_scomp_alloc_scratches(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) struct scomp_scratch *scratch;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) for_each_possible_cpu(i) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) void *mem;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) scratch = per_cpu_ptr(&scomp_scratch, i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) mem = vmalloc_node(SCOMP_SCRATCH_SIZE, cpu_to_node(i));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) if (!mem)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) goto error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) scratch->src = mem;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) mem = vmalloc_node(SCOMP_SCRATCH_SIZE, cpu_to_node(i));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) if (!mem)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) goto error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) scratch->dst = mem;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) error:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) crypto_scomp_free_scratches();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) static int crypto_scomp_init_tfm(struct crypto_tfm *tfm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) mutex_lock(&scomp_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) if (!scomp_scratch_users++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) ret = crypto_scomp_alloc_scratches();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) mutex_unlock(&scomp_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) static int scomp_acomp_comp_decomp(struct acomp_req *req, int dir)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) struct crypto_acomp *tfm = crypto_acomp_reqtfm(req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) void **tfm_ctx = acomp_tfm_ctx(tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) struct crypto_scomp *scomp = *tfm_ctx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) void **ctx = acomp_request_ctx(req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) struct scomp_scratch *scratch;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) if (!req->src || !req->slen || req->slen > SCOMP_SCRATCH_SIZE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) if (req->dst && !req->dlen)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) if (!req->dlen || req->dlen > SCOMP_SCRATCH_SIZE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) req->dlen = SCOMP_SCRATCH_SIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) scratch = raw_cpu_ptr(&scomp_scratch);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) spin_lock(&scratch->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) scatterwalk_map_and_copy(scratch->src, req->src, 0, req->slen, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) if (dir)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) ret = crypto_scomp_compress(scomp, scratch->src, req->slen,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) scratch->dst, &req->dlen, *ctx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) ret = crypto_scomp_decompress(scomp, scratch->src, req->slen,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) scratch->dst, &req->dlen, *ctx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) if (!ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) if (!req->dst) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) req->dst = sgl_alloc(req->dlen, GFP_ATOMIC, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) if (!req->dst) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) ret = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) scatterwalk_map_and_copy(scratch->dst, req->dst, 0, req->dlen,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) spin_unlock(&scratch->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) static int scomp_acomp_compress(struct acomp_req *req)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) return scomp_acomp_comp_decomp(req, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) static int scomp_acomp_decompress(struct acomp_req *req)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) return scomp_acomp_comp_decomp(req, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) static void crypto_exit_scomp_ops_async(struct crypto_tfm *tfm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) struct crypto_scomp **ctx = crypto_tfm_ctx(tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) crypto_free_scomp(*ctx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) mutex_lock(&scomp_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) if (!--scomp_scratch_users)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) crypto_scomp_free_scratches();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) mutex_unlock(&scomp_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) int crypto_init_scomp_ops_async(struct crypto_tfm *tfm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) struct crypto_alg *calg = tfm->__crt_alg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) struct crypto_acomp *crt = __crypto_acomp_tfm(tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) struct crypto_scomp **ctx = crypto_tfm_ctx(tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) struct crypto_scomp *scomp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) if (!crypto_mod_get(calg))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) return -EAGAIN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) scomp = crypto_create_tfm(calg, &crypto_scomp_type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) if (IS_ERR(scomp)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) crypto_mod_put(calg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) return PTR_ERR(scomp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) *ctx = scomp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) tfm->exit = crypto_exit_scomp_ops_async;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) crt->compress = scomp_acomp_compress;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) crt->decompress = scomp_acomp_decompress;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) crt->dst_free = sgl_free;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) crt->reqsize = sizeof(void *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) struct acomp_req *crypto_acomp_scomp_alloc_ctx(struct acomp_req *req)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) struct crypto_acomp *acomp = crypto_acomp_reqtfm(req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) struct crypto_tfm *tfm = crypto_acomp_tfm(acomp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) struct crypto_scomp **tfm_ctx = crypto_tfm_ctx(tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) struct crypto_scomp *scomp = *tfm_ctx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) void *ctx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) ctx = crypto_scomp_alloc_ctx(scomp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) if (IS_ERR(ctx)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) kfree(req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) *req->__ctx = ctx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) return req;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) void crypto_acomp_scomp_free_ctx(struct acomp_req *req)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) struct crypto_acomp *acomp = crypto_acomp_reqtfm(req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) struct crypto_tfm *tfm = crypto_acomp_tfm(acomp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) struct crypto_scomp **tfm_ctx = crypto_tfm_ctx(tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) struct crypto_scomp *scomp = *tfm_ctx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) void *ctx = *req->__ctx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) if (ctx)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) crypto_scomp_free_ctx(scomp, ctx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) static const struct crypto_type crypto_scomp_type = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) .extsize = crypto_alg_extsize,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) .init_tfm = crypto_scomp_init_tfm,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) #ifdef CONFIG_PROC_FS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) .show = crypto_scomp_show,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) .report = crypto_scomp_report,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) .maskclear = ~CRYPTO_ALG_TYPE_MASK,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) .maskset = CRYPTO_ALG_TYPE_MASK,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) .type = CRYPTO_ALG_TYPE_SCOMPRESS,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) .tfmsize = offsetof(struct crypto_scomp, base),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) int crypto_register_scomp(struct scomp_alg *alg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) struct crypto_alg *base = &alg->base;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) base->cra_type = &crypto_scomp_type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) base->cra_flags |= CRYPTO_ALG_TYPE_SCOMPRESS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) return crypto_register_alg(base);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) EXPORT_SYMBOL_GPL(crypto_register_scomp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) void crypto_unregister_scomp(struct scomp_alg *alg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) crypto_unregister_alg(&alg->base);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) EXPORT_SYMBOL_GPL(crypto_unregister_scomp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) int crypto_register_scomps(struct scomp_alg *algs, int count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) int i, ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) for (i = 0; i < count; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) ret = crypto_register_scomp(&algs[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) goto err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) err:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) for (--i; i >= 0; --i)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) crypto_unregister_scomp(&algs[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) EXPORT_SYMBOL_GPL(crypto_register_scomps);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) void crypto_unregister_scomps(struct scomp_alg *algs, int count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) for (i = count - 1; i >= 0; --i)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) crypto_unregister_scomp(&algs[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) EXPORT_SYMBOL_GPL(crypto_unregister_scomps);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) MODULE_DESCRIPTION("Synchronous compression type");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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