net/rxrpc/txbuf.c

23 	struct rxrpc_txbuf *txb;
27 	txb = kmalloc(sizeof(*txb), gfp);
28 	if (!txb)
40 		kfree(txb);
46 	INIT_LIST_HEAD(&txb->call_link);
47 	INIT_LIST_HEAD(&txb->tx_link);
48 	refcount_set(&txb->ref, 1);
49 	txb->last_sent		= KTIME_MIN;
50 	txb->call_debug_id	= call->debug_id;
51 	txb->debug_id		= atomic_inc_return(&rxrpc_txbuf_debug_ids);
52 	txb->space		= data_size;
53 	txb->len		= 0;
54 	txb->offset		= sizeof(*whdr);
55 	txb->flags		= call->conn->out_clientflag;
56 	txb->ack_why		= 0;
57 	txb->seq		= call->tx_prepared + 1;
58 	txb->serial		= 0;
59 	txb->cksum		= 0;
60 	txb->nr_kvec		= 1;
61 	txb->kvec[0].iov_base	= whdr;
62 	txb->kvec[0].iov_len	= sizeof(*whdr);
67 	whdr->seq		= htonl(txb->seq);
75 	trace_rxrpc_txbuf(txb->debug_id, txb->call_debug_id, txb->seq, 1,
79 	return txb;
90 	struct rxrpc_txbuf *txb;
95 	txb = kmalloc(sizeof(*txb), gfp);
96 	if (!txb)
102 		kfree(txb);
110 			kfree(txb);
120 	INIT_LIST_HEAD(&txb->call_link);
121 	INIT_LIST_HEAD(&txb->tx_link);
122 	refcount_set(&txb->ref, 1);
123 	txb->call_debug_id	= call->debug_id;
124 	txb->debug_id		= atomic_inc_return(&rxrpc_txbuf_debug_ids);
125 	txb->space		= 0;
126 	txb->len		= sizeof(*whdr) + sizeof(*ack) + 3 + sizeof(*trailer);
127 	txb->offset		= 0;
128 	txb->flags		= call->conn->out_clientflag;
129 	txb->ack_rwind		= 0;
130 	txb->seq		= 0;
131 	txb->serial		= 0;
132 	txb->cksum		= 0;
133 	txb->nr_kvec		= 3;
134 	txb->kvec[0].iov_base	= whdr;
135 	txb->kvec[0].iov_len	= sizeof(*whdr) + sizeof(*ack);
136 	txb->kvec[1].iov_base	= buf2;
137 	txb->kvec[1].iov_len	= sack_size;
138 	txb->kvec[2].iov_base	= filler;
139 	txb->kvec[2].iov_len	= 3 + sizeof(*trailer);
154 	trace_rxrpc_txbuf(txb->debug_id, txb->call_debug_id, txb->seq, 1,
157 	return txb;
160 void rxrpc_get_txbuf(struct rxrpc_txbuf *txb, enum rxrpc_txbuf_trace what)
164 	__refcount_inc(&txb->ref, &r);
165 	trace_rxrpc_txbuf(txb->debug_id, txb->call_debug_id, txb->seq, r + 1, what);
168 void rxrpc_see_txbuf(struct rxrpc_txbuf *txb, enum rxrpc_txbuf_trace what)
170 	int r = refcount_read(&txb->ref);
172 	trace_rxrpc_txbuf(txb->debug_id, txb->call_debug_id, txb->seq, r, what);
175 static void rxrpc_free_txbuf(struct rxrpc_txbuf *txb)
179 	trace_rxrpc_txbuf(txb->debug_id, txb->call_debug_id, txb->seq, 0,
181 	for (i = 0; i < txb->nr_kvec; i++)
182 		if (txb->kvec[i].iov_base)
183 			page_frag_free(txb->kvec[i].iov_base);
184 	kfree(txb);
188 void rxrpc_put_txbuf(struct rxrpc_txbuf *txb, enum rxrpc_txbuf_trace what)
195 	if (txb) {
196 		debug_id = txb->debug_id;
197 		call_debug_id = txb->call_debug_id;
198 		seq = txb->seq;
199 		dead = __refcount_dec_and_test(&txb->ref, &r);
202 			rxrpc_free_txbuf(txb);
211 	struct rxrpc_txbuf *txb;
217 	while ((txb = list_first_entry_or_null(&call->tx_buffer,
220 		if (before(hard_ack, txb->seq))
223 		if (txb->seq != call->tx_bottom + 1)
224 			rxrpc_see_txbuf(txb, rxrpc_txbuf_see_out_of_step);
225 		ASSERTCMP(txb->seq, ==, call->tx_bottom + 1);
227 		list_del_rcu(&txb->call_link);
231 		rxrpc_put_txbuf(txb, rxrpc_txbuf_put_rotated);