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xdp: export xdp_rxq_info_unreg_mem_model

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Export __xdp_rxq_info_unreg_mem_model as xdp_rxq_info_unreg_mem_model,
so it can be used from netdev drivers. Also, add additional checks for
the memory type.

Signed-off-by: Björn Töpel <bjorn.topel@intel.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Björn Töpel 2018-08-28 14:44:26 +02:00 committed by Alexei Starovoitov
parent b0d1beeff2
commit dce5bd6140
2 changed files with 14 additions and 2 deletions
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1
include/net/xdp.h
View File

@ -136,6 +136,7 @@ void xdp_rxq_info_unused(struct xdp_rxq_info *xdp_rxq);
bool xdp_rxq_info_is_reg(struct xdp_rxq_info *xdp_rxq);
int xdp_rxq_info_reg_mem_model(struct xdp_rxq_info *xdp_rxq,
enum xdp_mem_type type, void *allocator);
void xdp_rxq_info_unreg_mem_model(struct xdp_rxq_info *xdp_rxq);
/* Drivers not supporting XDP metadata can use this helper, which
* rejects any room expansion for metadata as a result.

15
net/core/xdp.c
View File

@ -94,11 +94,21 @@ static void __xdp_mem_allocator_rcu_free(struct rcu_head *rcu)
kfree(xa);
}
static void __xdp_rxq_info_unreg_mem_model(struct xdp_rxq_info *xdp_rxq)
void xdp_rxq_info_unreg_mem_model(struct xdp_rxq_info *xdp_rxq)
{
struct xdp_mem_allocator *xa;
int id = xdp_rxq->mem.id;
if (xdp_rxq->reg_state != REG_STATE_REGISTERED) {
WARN(1, "Missing register, driver bug");
return;
}
if (xdp_rxq->mem.type != MEM_TYPE_PAGE_POOL &&
xdp_rxq->mem.type != MEM_TYPE_ZERO_COPY) {
return;
}
if (id == 0)
return;
@ -110,6 +120,7 @@ static void __xdp_rxq_info_unreg_mem_model(struct xdp_rxq_info *xdp_rxq)
mutex_unlock(&mem_id_lock);
}
EXPORT_SYMBOL_GPL(xdp_rxq_info_unreg_mem_model);
void xdp_rxq_info_unreg(struct xdp_rxq_info *xdp_rxq)
{
@ -119,7 +130,7 @@ void xdp_rxq_info_unreg(struct xdp_rxq_info *xdp_rxq)
WARN(!(xdp_rxq->reg_state == REG_STATE_REGISTERED), "Driver BUG");
__xdp_rxq_info_unreg_mem_model(xdp_rxq);
xdp_rxq_info_unreg_mem_model(xdp_rxq);
xdp_rxq->reg_state = REG_STATE_UNREGISTERED;
xdp_rxq->dev = NULL;