blob: 16c241a234728b0c6448885ad6e1d9be945d44b7 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
|
/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* Skb ref helpers.
*
*/
#ifndef _LINUX_SKBUFF_REF_H
#define _LINUX_SKBUFF_REF_H
#include <linux/skbuff.h>
/**
* __skb_frag_ref - take an addition reference on a paged fragment.
* @frag: the paged fragment
*
* Takes an additional reference on the paged fragment @frag.
*/
static inline void __skb_frag_ref(skb_frag_t *frag)
{
get_page(skb_frag_page(frag));
}
/**
* skb_frag_ref - take an addition reference on a paged fragment of an skb.
* @skb: the buffer
* @f: the fragment offset.
*
* Takes an additional reference on the @f'th paged fragment of @skb.
*/
static inline void skb_frag_ref(struct sk_buff *skb, int f)
{
__skb_frag_ref(&skb_shinfo(skb)->frags[f]);
}
bool napi_pp_put_page(netmem_ref netmem);
static inline void
skb_page_unref(struct page *page, bool recycle)
{
#ifdef CONFIG_PAGE_POOL
if (recycle && napi_pp_put_page(page_to_netmem(page)))
return;
#endif
put_page(page);
}
/**
* __skb_frag_unref - release a reference on a paged fragment.
* @frag: the paged fragment
* @recycle: recycle the page if allocated via page_pool
*
* Releases a reference on the paged fragment @frag
* or recycles the page via the page_pool API.
*/
static inline void __skb_frag_unref(skb_frag_t *frag, bool recycle)
{
skb_page_unref(skb_frag_page(frag), recycle);
}
/**
* skb_frag_unref - release a reference on a paged fragment of an skb.
* @skb: the buffer
* @f: the fragment offset
*
* Releases a reference on the @f'th paged fragment of @skb.
*/
static inline void skb_frag_unref(struct sk_buff *skb, int f)
{
struct skb_shared_info *shinfo = skb_shinfo(skb);
if (!skb_zcopy_managed(skb))
__skb_frag_unref(&shinfo->frags[f], skb->pp_recycle);
}
#endif /* _LINUX_SKBUFF_REF_H */
|
