Revision 72f961320d5d15bfcb26dbe3edaa3f7d25fd2c8a authored by Paolo Abeni on 10 June 2021, 22:59:40 UTC, committed by David S. Miller on 10 June 2021, 23:47:44 UTC
If the host is under sever memory pressure, and RX forward memory allocation for the msk fails, we try to borrow the required memory from the ingress subflow. The current attempt is a bit flaky: if skb->truesize is less than SK_MEM_QUANTUM, the ssk will not release any memory, and the next schedule will fail again. Instead, directly move the required amount of pages from the ssk to the msk, if available Fixes: 9c3f94e1681b ("mptcp: add missing memory scheduling in the rx path") Signed-off-by: Paolo Abeni <pabeni@redhat.com> Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
1 parent 22488e4
acompress.c
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Asynchronous Compression operations
*
* Copyright (c) 2016, Intel Corporation
* Authors: Weigang Li <weigang.li@intel.com>
* Giovanni Cabiddu <giovanni.cabiddu@intel.com>
*/
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/seq_file.h>
#include <linux/slab.h>
#include <linux/string.h>
#include <linux/crypto.h>
#include <crypto/algapi.h>
#include <linux/cryptouser.h>
#include <linux/compiler.h>
#include <net/netlink.h>
#include <crypto/internal/acompress.h>
#include <crypto/internal/scompress.h>
#include "internal.h"
static const struct crypto_type crypto_acomp_type;
#ifdef CONFIG_NET
static int crypto_acomp_report(struct sk_buff *skb, struct crypto_alg *alg)
{
struct crypto_report_acomp racomp;
memset(&racomp, 0, sizeof(racomp));
strscpy(racomp.type, "acomp", sizeof(racomp.type));
return nla_put(skb, CRYPTOCFGA_REPORT_ACOMP, sizeof(racomp), &racomp);
}
#else
static int crypto_acomp_report(struct sk_buff *skb, struct crypto_alg *alg)
{
return -ENOSYS;
}
#endif
static void crypto_acomp_show(struct seq_file *m, struct crypto_alg *alg)
__maybe_unused;
static void crypto_acomp_show(struct seq_file *m, struct crypto_alg *alg)
{
seq_puts(m, "type : acomp\n");
}
static void crypto_acomp_exit_tfm(struct crypto_tfm *tfm)
{
struct crypto_acomp *acomp = __crypto_acomp_tfm(tfm);
struct acomp_alg *alg = crypto_acomp_alg(acomp);
alg->exit(acomp);
}
static int crypto_acomp_init_tfm(struct crypto_tfm *tfm)
{
struct crypto_acomp *acomp = __crypto_acomp_tfm(tfm);
struct acomp_alg *alg = crypto_acomp_alg(acomp);
if (tfm->__crt_alg->cra_type != &crypto_acomp_type)
return crypto_init_scomp_ops_async(tfm);
acomp->compress = alg->compress;
acomp->decompress = alg->decompress;
acomp->dst_free = alg->dst_free;
acomp->reqsize = alg->reqsize;
if (alg->exit)
acomp->base.exit = crypto_acomp_exit_tfm;
if (alg->init)
return alg->init(acomp);
return 0;
}
static unsigned int crypto_acomp_extsize(struct crypto_alg *alg)
{
int extsize = crypto_alg_extsize(alg);
if (alg->cra_type != &crypto_acomp_type)
extsize += sizeof(struct crypto_scomp *);
return extsize;
}
static const struct crypto_type crypto_acomp_type = {
.extsize = crypto_acomp_extsize,
.init_tfm = crypto_acomp_init_tfm,
#ifdef CONFIG_PROC_FS
.show = crypto_acomp_show,
#endif
.report = crypto_acomp_report,
.maskclear = ~CRYPTO_ALG_TYPE_MASK,
.maskset = CRYPTO_ALG_TYPE_ACOMPRESS_MASK,
.type = CRYPTO_ALG_TYPE_ACOMPRESS,
.tfmsize = offsetof(struct crypto_acomp, base),
};
struct crypto_acomp *crypto_alloc_acomp(const char *alg_name, u32 type,
u32 mask)
{
return crypto_alloc_tfm(alg_name, &crypto_acomp_type, type, mask);
}
EXPORT_SYMBOL_GPL(crypto_alloc_acomp);
struct crypto_acomp *crypto_alloc_acomp_node(const char *alg_name, u32 type,
u32 mask, int node)
{
return crypto_alloc_tfm_node(alg_name, &crypto_acomp_type, type, mask,
node);
}
EXPORT_SYMBOL_GPL(crypto_alloc_acomp_node);
struct acomp_req *acomp_request_alloc(struct crypto_acomp *acomp)
{
struct crypto_tfm *tfm = crypto_acomp_tfm(acomp);
struct acomp_req *req;
req = __acomp_request_alloc(acomp);
if (req && (tfm->__crt_alg->cra_type != &crypto_acomp_type))
return crypto_acomp_scomp_alloc_ctx(req);
return req;
}
EXPORT_SYMBOL_GPL(acomp_request_alloc);
void acomp_request_free(struct acomp_req *req)
{
struct crypto_acomp *acomp = crypto_acomp_reqtfm(req);
struct crypto_tfm *tfm = crypto_acomp_tfm(acomp);
if (tfm->__crt_alg->cra_type != &crypto_acomp_type)
crypto_acomp_scomp_free_ctx(req);
if (req->flags & CRYPTO_ACOMP_ALLOC_OUTPUT) {
acomp->dst_free(req->dst);
req->dst = NULL;
}
__acomp_request_free(req);
}
EXPORT_SYMBOL_GPL(acomp_request_free);
int crypto_register_acomp(struct acomp_alg *alg)
{
struct crypto_alg *base = &alg->base;
base->cra_type = &crypto_acomp_type;
base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK;
base->cra_flags |= CRYPTO_ALG_TYPE_ACOMPRESS;
return crypto_register_alg(base);
}
EXPORT_SYMBOL_GPL(crypto_register_acomp);
void crypto_unregister_acomp(struct acomp_alg *alg)
{
crypto_unregister_alg(&alg->base);
}
EXPORT_SYMBOL_GPL(crypto_unregister_acomp);
int crypto_register_acomps(struct acomp_alg *algs, int count)
{
int i, ret;
for (i = 0; i < count; i++) {
ret = crypto_register_acomp(&algs[i]);
if (ret)
goto err;
}
return 0;
err:
for (--i; i >= 0; --i)
crypto_unregister_acomp(&algs[i]);
return ret;
}
EXPORT_SYMBOL_GPL(crypto_register_acomps);
void crypto_unregister_acomps(struct acomp_alg *algs, int count)
{
int i;
for (i = count - 1; i >= 0; --i)
crypto_unregister_acomp(&algs[i]);
}
EXPORT_SYMBOL_GPL(crypto_unregister_acomps);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Asynchronous compression type");
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