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net/rxrpc/skbuff.c
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// SPDX-License-Identifier: GPL-2.0-or-later |
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/* ar-skbuff.c: socket buffer destruction handling * * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved. * Written by David Howells (dhowells@redhat.com) |
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*/ |
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
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#include <linux/module.h> #include <linux/net.h> #include <linux/skbuff.h> #include <net/sock.h> #include <net/af_rxrpc.h> #include "ar-internal.h" |
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#define is_tx_skb(skb) (rxrpc_skb(skb)->rx_flags & RXRPC_SKB_TX_BUFFER) #define select_skb_count(skb) (is_tx_skb(skb) ? &rxrpc_n_tx_skbs : &rxrpc_n_rx_skbs) |
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/* |
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* Note the allocation or reception of a socket buffer. |
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*/ |
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void rxrpc_new_skb(struct sk_buff *skb, enum rxrpc_skb_trace op) |
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{ const void *here = __builtin_return_address(0); |
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int n = atomic_inc_return(select_skb_count(skb)); |
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trace_rxrpc_skb(skb, op, refcount_read(&skb->users), n, rxrpc_skb(skb)->rx_flags, here); |
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} /* * Note the re-emergence of a socket buffer from a queue or buffer. */ |
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void rxrpc_see_skb(struct sk_buff *skb, enum rxrpc_skb_trace op) |
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{ const void *here = __builtin_return_address(0); if (skb) { |
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int n = atomic_read(select_skb_count(skb)); |
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trace_rxrpc_skb(skb, op, refcount_read(&skb->users), n, rxrpc_skb(skb)->rx_flags, here); |
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} } /* * Note the addition of a ref on a socket buffer. */ |
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void rxrpc_get_skb(struct sk_buff *skb, enum rxrpc_skb_trace op) |
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{ const void *here = __builtin_return_address(0); |
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int n = atomic_inc_return(select_skb_count(skb)); |
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trace_rxrpc_skb(skb, op, refcount_read(&skb->users), n, rxrpc_skb(skb)->rx_flags, here); |
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skb_get(skb); } /* |
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* Note the dropping of a ref on a socket buffer by the core. */ void rxrpc_eaten_skb(struct sk_buff *skb, enum rxrpc_skb_trace op) { const void *here = __builtin_return_address(0); int n = atomic_inc_return(&rxrpc_n_rx_skbs); trace_rxrpc_skb(skb, op, 0, n, 0, here); } /* |
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* Note the destruction of a socket buffer. */ |
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void rxrpc_free_skb(struct sk_buff *skb, enum rxrpc_skb_trace op) |
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{ const void *here = __builtin_return_address(0); if (skb) { int n; CHECK_SLAB_OKAY(&skb->users); |
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n = atomic_dec_return(select_skb_count(skb)); |
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trace_rxrpc_skb(skb, op, refcount_read(&skb->users), n, rxrpc_skb(skb)->rx_flags, here); |
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kfree_skb(skb); } } /* * Clear a queue of socket buffers. */ void rxrpc_purge_queue(struct sk_buff_head *list) { const void *here = __builtin_return_address(0); struct sk_buff *skb; while ((skb = skb_dequeue((list))) != NULL) { |
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int n = atomic_dec_return(select_skb_count(skb)); trace_rxrpc_skb(skb, rxrpc_skb_purged, |
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refcount_read(&skb->users), n, rxrpc_skb(skb)->rx_flags, here); |
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kfree_skb(skb); } } |