1 // SPDX-License-Identifier: GPL-2.0-or-later 1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /* Socket buffer accounting !! 2 /* ar-skbuff.c: socket buffer destruction handling
3 * 3 *
4 * Copyright (C) 2007 Red Hat, Inc. All Rights 4 * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
5 * Written by David Howells (dhowells@redhat.c 5 * Written by David Howells (dhowells@redhat.com)
6 */ 6 */
7 7
8 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 8 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
9 9
10 #include <linux/module.h> 10 #include <linux/module.h>
11 #include <linux/net.h> 11 #include <linux/net.h>
12 #include <linux/skbuff.h> 12 #include <linux/skbuff.h>
13 #include <net/sock.h> 13 #include <net/sock.h>
14 #include <net/af_rxrpc.h> 14 #include <net/af_rxrpc.h>
15 #include "ar-internal.h" 15 #include "ar-internal.h"
16 16
17 #define select_skb_count(skb) (&rxrpc_n_rx_skb !! 17 #define is_tx_skb(skb) (rxrpc_skb(skb)->rx_flags & RXRPC_SKB_TX_BUFFER)
>> 18 #define select_skb_count(skb) (is_tx_skb(skb) ? &rxrpc_n_tx_skbs : &rxrpc_n_rx_skbs)
18 19
19 /* 20 /*
20 * Note the allocation or reception of a socke 21 * Note the allocation or reception of a socket buffer.
21 */ 22 */
22 void rxrpc_new_skb(struct sk_buff *skb, enum r !! 23 void rxrpc_new_skb(struct sk_buff *skb, enum rxrpc_skb_trace op)
23 { 24 {
>> 25 const void *here = __builtin_return_address(0);
24 int n = atomic_inc_return(select_skb_c 26 int n = atomic_inc_return(select_skb_count(skb));
25 trace_rxrpc_skb(skb, refcount_read(&sk !! 27 trace_rxrpc_skb(skb, op, refcount_read(&skb->users), n,
>> 28 rxrpc_skb(skb)->rx_flags, here);
26 } 29 }
27 30
28 /* 31 /*
29 * Note the re-emergence of a socket buffer fr 32 * Note the re-emergence of a socket buffer from a queue or buffer.
30 */ 33 */
31 void rxrpc_see_skb(struct sk_buff *skb, enum r !! 34 void rxrpc_see_skb(struct sk_buff *skb, enum rxrpc_skb_trace op)
32 { 35 {
>> 36 const void *here = __builtin_return_address(0);
33 if (skb) { 37 if (skb) {
34 int n = atomic_read(select_skb 38 int n = atomic_read(select_skb_count(skb));
35 trace_rxrpc_skb(skb, refcount_ !! 39 trace_rxrpc_skb(skb, op, refcount_read(&skb->users), n,
>> 40 rxrpc_skb(skb)->rx_flags, here);
36 } 41 }
37 } 42 }
38 43
39 /* 44 /*
40 * Note the addition of a ref on a socket buff 45 * Note the addition of a ref on a socket buffer.
41 */ 46 */
42 void rxrpc_get_skb(struct sk_buff *skb, enum r !! 47 void rxrpc_get_skb(struct sk_buff *skb, enum rxrpc_skb_trace op)
43 { 48 {
>> 49 const void *here = __builtin_return_address(0);
44 int n = atomic_inc_return(select_skb_c 50 int n = atomic_inc_return(select_skb_count(skb));
45 trace_rxrpc_skb(skb, refcount_read(&sk !! 51 trace_rxrpc_skb(skb, op, refcount_read(&skb->users), n,
>> 52 rxrpc_skb(skb)->rx_flags, here);
46 skb_get(skb); 53 skb_get(skb);
47 } 54 }
48 55
49 /* 56 /*
50 * Note the dropping of a ref on a socket buff 57 * Note the dropping of a ref on a socket buffer by the core.
51 */ 58 */
52 void rxrpc_eaten_skb(struct sk_buff *skb, enum !! 59 void rxrpc_eaten_skb(struct sk_buff *skb, enum rxrpc_skb_trace op)
53 { 60 {
>> 61 const void *here = __builtin_return_address(0);
54 int n = atomic_inc_return(&rxrpc_n_rx_ 62 int n = atomic_inc_return(&rxrpc_n_rx_skbs);
55 trace_rxrpc_skb(skb, 0, n, why); !! 63 trace_rxrpc_skb(skb, op, 0, n, 0, here);
56 } 64 }
57 65
58 /* 66 /*
59 * Note the destruction of a socket buffer. 67 * Note the destruction of a socket buffer.
60 */ 68 */
61 void rxrpc_free_skb(struct sk_buff *skb, enum !! 69 void rxrpc_free_skb(struct sk_buff *skb, enum rxrpc_skb_trace op)
62 { 70 {
>> 71 const void *here = __builtin_return_address(0);
63 if (skb) { 72 if (skb) {
64 int n = atomic_dec_return(sele !! 73 int n;
65 trace_rxrpc_skb(skb, refcount_ !! 74 CHECK_SLAB_OKAY(&skb->users);
66 consume_skb(skb); !! 75 n = atomic_dec_return(select_skb_count(skb));
>> 76 trace_rxrpc_skb(skb, op, refcount_read(&skb->users), n,
>> 77 rxrpc_skb(skb)->rx_flags, here);
>> 78 kfree_skb(skb);
67 } 79 }
68 } 80 }
69 81
70 /* 82 /*
71 * Clear a queue of socket buffers. 83 * Clear a queue of socket buffers.
72 */ 84 */
73 void rxrpc_purge_queue(struct sk_buff_head *li 85 void rxrpc_purge_queue(struct sk_buff_head *list)
74 { 86 {
>> 87 const void *here = __builtin_return_address(0);
75 struct sk_buff *skb; 88 struct sk_buff *skb;
76 <<
77 while ((skb = skb_dequeue((list))) != 89 while ((skb = skb_dequeue((list))) != NULL) {
78 int n = atomic_dec_return(sele 90 int n = atomic_dec_return(select_skb_count(skb));
79 trace_rxrpc_skb(skb, refcount_ !! 91 trace_rxrpc_skb(skb, rxrpc_skb_purged,
80 rxrpc_skb_put_ !! 92 refcount_read(&skb->users), n,
81 consume_skb(skb); !! 93 rxrpc_skb(skb)->rx_flags, here);
>> 94 kfree_skb(skb);
82 } 95 }
83 } 96 }
84 97
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