xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
複製 0
程式碼 問題管理 合併請求 Actions Packages Projects 版本發佈 Wiki Activity

xsk: introduce xdp_umem_page

瀏覽代碼 
The xdp_umem_page holds the address for a page. Trade memory for
faster lookup. Later, we'll add DMA address here as well.

Signed-off-by: Björn Töpel <bjorn.topel@intel.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
This commit is contained in:
Björn Töpel
2018-06-04 14:05:52 +02:00
committed by Daniel Borkmann
父節點 e61e62b9e2
當前提交 8aef7340ae
共有 3 個文件被更改，包括 21 次插入 和 4 次删除
Download Patch File Download Diff File Expand all files Collapse all files

15
net/xdp/xdp_umem.c
查看文件

@@ -65,6 +65,9 @@ static void xdp_umem_release(struct xdp_umem *umem)
goto out;
mmput(mm);
kfree(umem->pages);
umem->pages = NULL;
xdp_umem_unaccount_pages(umem);
out:
kfree(umem);
@@ -155,7 +158,7 @@ static int xdp_umem_reg(struct xdp_umem *umem, struct xdp_umem_reg *mr)
u32 chunk_size = mr->chunk_size, headroom = mr->headroom;
unsigned int chunks, chunks_per_page;
u64 addr = mr->addr, size = mr->len;
int size_chk, err;
int size_chk, err, i;
if (chunk_size < XDP_UMEM_MIN_CHUNK_SIZE || chunk_size > PAGE_SIZE) {
/* Strictly speaking we could support this, if:
@@ -213,6 +216,16 @@ static int xdp_umem_reg(struct xdp_umem *umem, struct xdp_umem_reg *mr)
err = xdp_umem_pin_pages(umem);
if (err)
goto out_account;
umem->pages = kcalloc(umem->npgs, sizeof(*umem->pages), GFP_KERNEL);
if (!umem->pages) {
err = -ENOMEM;
goto out_account;
}
for (i = 0; i < umem->npgs; i++)
umem->pages[i].addr = page_address(umem->pgs[i]);
return 0;
out_account: