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 select_skb_count(op) (op >= rxrpc_skb_tx_cleaned ? &rxrpc_n_tx_skbs : &rxrpc_n_rx_skbs)
18 18
19 /* 19 /*
20 * Note the allocation or reception of a socke 20 * Note the allocation or reception of a socket buffer.
21 */ 21 */
22 void rxrpc_new_skb(struct sk_buff *skb, enum r !! 22 void rxrpc_new_skb(struct sk_buff *skb, enum rxrpc_skb_trace op)
23 { 23 {
24 int n = atomic_inc_return(select_skb_c !! 24 const void *here = __builtin_return_address(0);
25 trace_rxrpc_skb(skb, refcount_read(&sk !! 25 int n = atomic_inc_return(select_skb_count(op));
>> 26 trace_rxrpc_skb(skb, op, refcount_read(&skb->users), n, here);
26 } 27 }
27 28
28 /* 29 /*
29 * Note the re-emergence of a socket buffer fr 30 * Note the re-emergence of a socket buffer from a queue or buffer.
30 */ 31 */
31 void rxrpc_see_skb(struct sk_buff *skb, enum r !! 32 void rxrpc_see_skb(struct sk_buff *skb, enum rxrpc_skb_trace op)
32 { 33 {
>> 34 const void *here = __builtin_return_address(0);
33 if (skb) { 35 if (skb) {
34 int n = atomic_read(select_skb !! 36 int n = atomic_read(select_skb_count(op));
35 trace_rxrpc_skb(skb, refcount_ !! 37 trace_rxrpc_skb(skb, op, refcount_read(&skb->users), n, here);
36 } 38 }
37 } 39 }
38 40
39 /* 41 /*
40 * Note the addition of a ref on a socket buff 42 * Note the addition of a ref on a socket buffer.
41 */ 43 */
42 void rxrpc_get_skb(struct sk_buff *skb, enum r !! 44 void rxrpc_get_skb(struct sk_buff *skb, enum rxrpc_skb_trace op)
43 { 45 {
44 int n = atomic_inc_return(select_skb_c !! 46 const void *here = __builtin_return_address(0);
45 trace_rxrpc_skb(skb, refcount_read(&sk !! 47 int n = atomic_inc_return(select_skb_count(op));
>> 48 trace_rxrpc_skb(skb, op, refcount_read(&skb->users), n, here);
46 skb_get(skb); 49 skb_get(skb);
47 } 50 }
48 51
49 /* 52 /*
50 * Note the dropping of a ref on a socket buff <<
51 */ <<
52 void rxrpc_eaten_skb(struct sk_buff *skb, enum <<
53 { <<
54 int n = atomic_inc_return(&rxrpc_n_rx_ <<
55 trace_rxrpc_skb(skb, 0, n, why); <<
56 } <<
57 <<
58 /* <<
59 * Note the destruction of a socket buffer. 53 * Note the destruction of a socket buffer.
60 */ 54 */
61 void rxrpc_free_skb(struct sk_buff *skb, enum !! 55 void rxrpc_free_skb(struct sk_buff *skb, enum rxrpc_skb_trace op)
62 { 56 {
>> 57 const void *here = __builtin_return_address(0);
63 if (skb) { 58 if (skb) {
64 int n = atomic_dec_return(sele !! 59 int n;
65 trace_rxrpc_skb(skb, refcount_ !! 60 CHECK_SLAB_OKAY(&skb->users);
66 consume_skb(skb); !! 61 n = atomic_dec_return(select_skb_count(op));
>> 62 trace_rxrpc_skb(skb, op, refcount_read(&skb->users), n, here);
>> 63 kfree_skb(skb);
67 } 64 }
68 } 65 }
69 66
70 /* 67 /*
71 * Clear a queue of socket buffers. 68 * Clear a queue of socket buffers.
72 */ 69 */
73 void rxrpc_purge_queue(struct sk_buff_head *li 70 void rxrpc_purge_queue(struct sk_buff_head *list)
74 { 71 {
>> 72 const void *here = __builtin_return_address(0);
75 struct sk_buff *skb; 73 struct sk_buff *skb;
76 <<
77 while ((skb = skb_dequeue((list))) != 74 while ((skb = skb_dequeue((list))) != NULL) {
78 int n = atomic_dec_return(sele !! 75 int n = atomic_dec_return(select_skb_count(rxrpc_skb_rx_purged));
79 trace_rxrpc_skb(skb, refcount_ !! 76 trace_rxrpc_skb(skb, rxrpc_skb_rx_purged,
80 rxrpc_skb_put_ !! 77 refcount_read(&skb->users), n, here);
81 consume_skb(skb); !! 78 kfree_skb(skb);
82 } 79 }
83 } 80 }
84 81
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