modify sin led gpio

hc

2024-05-13 9d77db3c730780c8ef5ccd4b66403ff5675cfe4e

 kernel/net/sctp/stream.c
..
..
@@ -1,3 +1,4 @@
1
+// SPDX-License-Identifier: GPL-2.0-or-later
1
2
 /* SCTP kernel implementation
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3
  * (C) Copyright IBM Corp. 2001, 2004
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4
  * Copyright (c) 1999-2000 Cisco, Inc.
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..
@@ -7,22 +8,6 @@
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8
  * This file is part of the SCTP kernel implementation
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  *
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  * This file contains sctp stream maniuplation primitives and helpers.
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- *
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- * This SCTP implementation is free software;
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- * you can redistribute it and/or modify it under the terms of
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- * the GNU General Public License as published by
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- * the Free Software Foundation; either version 2, or (at your option)
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- * any later version.
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- *
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- * This SCTP implementation is distributed in the hope that it
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- * will be useful, but WITHOUT ANY WARRANTY; without even the implied
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- *                 ************************
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- * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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- * See the GNU General Public License for more details.
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- *
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- * You should have received a copy of the GNU General Public License
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- * along with GNU CC; see the file COPYING.  If not, see
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- * <http://www.gnu.org/licenses/>.
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11
  *
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12
  * Please send any bug reports or fixes you make to the
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13
  * email address(es):
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..
@@ -36,66 +21,6 @@
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21
 #include <net/sctp/sctp.h>
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22
 #include <net/sctp/sm.h>
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23
 #include <net/sctp/stream_sched.h>
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-
40
-static struct flex_array *fa_alloc(size_t elem_size, size_t elem_count,
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-				   gfp_t gfp)
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-{
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-	struct flex_array *result;
44
-	int err;
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-
46
-	result = flex_array_alloc(elem_size, elem_count, gfp);
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-	if (result) {
48
-		err = flex_array_prealloc(result, 0, elem_count, gfp);
49
-		if (err) {
50
-			flex_array_free(result);
51
-			result = NULL;
52
-		}
53
-	}
54
-
55
-	return result;
56
-}
57
-
58
-static void fa_free(struct flex_array *fa)
59
-{
60
-	if (fa)
61
-		flex_array_free(fa);
62
-}
63
-
64
-static void fa_copy(struct flex_array *fa, struct flex_array *from,
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-		    size_t index, size_t count)
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-{
67
-	void *elem;
68
-
69
-	while (count--) {
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-		elem = flex_array_get(from, index);
71
-		flex_array_put(fa, index, elem, 0);
72
-		index++;
73
-	}
74
-}
75
-
76
-static void fa_zero(struct flex_array *fa, size_t index, size_t count)
77
-{
78
-	void *elem;
79
-
80
-	while (count--) {
81
-		elem = flex_array_get(fa, index);
82
-		memset(elem, 0, fa->element_size);
83
-		index++;
84
-	}
85
-}
86
-
87
-static size_t fa_index(struct flex_array *fa, void *elem, size_t count)
88
-{
89
-	size_t index = 0;
90
-
91
-	while (count--) {
92
-		if (elem == flex_array_get(fa, index))
93
-			break;
94
-		index++;
95
-	}
96
-
97
-	return index;
98
-}
99
24
 
100
25
 static void sctp_stream_shrink_out(struct sctp_stream *stream, __u16 outcnt)
101
26
 {
..
..
@@ -127,6 +52,19 @@
127
52
 	}
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53
 }
129
54
 
55
+static void sctp_stream_free_ext(struct sctp_stream *stream, __u16 sid)
56
+{
57
+	struct sctp_sched_ops *sched;
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+
59
+	if (!SCTP_SO(stream, sid)->ext)
60
+		return;
61
+
62
+	sched = sctp_sched_ops_from_stream(stream);
63
+	sched->free_sid(stream, sid);
64
+	kfree(SCTP_SO(stream, sid)->ext);
65
+	SCTP_SO(stream, sid)->ext = NULL;
66
+}
67
+
130
68
 /* Migrates chunks from stream queues to new stream queues if needed,
131
69
  * but not across associations. Also, removes those chunks to streams
132
70
  * higher than the new max.
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..
@@ -145,68 +83,47 @@
145
83
 		 * sctp_stream_update will swap ->out pointers.
146
84
 		 */
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85
 		for (i = 0; i < outcnt; i++) {
148
-			kfree(SCTP_SO(new, i)->ext);
86
+			sctp_stream_free_ext(new, i);
149
87
 			SCTP_SO(new, i)->ext = SCTP_SO(stream, i)->ext;
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88
 			SCTP_SO(stream, i)->ext = NULL;
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89
 		}
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90
 	}
153
91
 
154
-	for (i = outcnt; i < stream->outcnt; i++) {
155
-		kfree(SCTP_SO(stream, i)->ext);
156
-		SCTP_SO(stream, i)->ext = NULL;
157
-	}
92
+	for (i = outcnt; i < stream->outcnt; i++)
93
+		sctp_stream_free_ext(stream, i);
158
94
 }
159
95
 
160
96
 static int sctp_stream_alloc_out(struct sctp_stream *stream, __u16 outcnt,
161
97
 				 gfp_t gfp)
162
98
 {
163
-	struct flex_array *out;
164
-	size_t elem_size = sizeof(struct sctp_stream_out);
99
+	int ret;
165
100
 
166
-	out = fa_alloc(elem_size, outcnt, gfp);
167
-	if (!out)
168
-		return -ENOMEM;
101
+	if (outcnt <= stream->outcnt)
102
+		goto out;
169
103
 
170
-	if (stream->out) {
171
-		fa_copy(out, stream->out, 0, min(outcnt, stream->outcnt));
172
-		if (stream->out_curr) {
173
-			size_t index = fa_index(stream->out, stream->out_curr,
174
-						stream->outcnt);
104
+	ret = genradix_prealloc(&stream->out, outcnt, gfp);
105
+	if (ret)
106
+		return ret;
175
107
 
176
-			BUG_ON(index == stream->outcnt);
177
-			stream->out_curr = flex_array_get(out, index);
178
-		}
179
-		fa_free(stream->out);
180
-	}
181
-
182
-	if (outcnt > stream->outcnt)
183
-		fa_zero(out, stream->outcnt, (outcnt - stream->outcnt));
184
-
185
-	stream->out = out;
186
-
108
+out:
109
+	stream->outcnt = outcnt;
187
110
 	return 0;
188
111
 }
189
112
 
190
113
 static int sctp_stream_alloc_in(struct sctp_stream *stream, __u16 incnt,
191
114
 				gfp_t gfp)
192
115
 {
193
-	struct flex_array *in;
194
-	size_t elem_size = sizeof(struct sctp_stream_in);
116
+	int ret;
195
117
 
196
-	in = fa_alloc(elem_size, incnt, gfp);
197
-	if (!in)
198
-		return -ENOMEM;
118
+	if (incnt <= stream->incnt)
119
+		goto out;
199
120
 
200
-	if (stream->in) {
201
-		fa_copy(in, stream->in, 0, min(incnt, stream->incnt));
202
-		fa_free(stream->in);
203
-	}
121
+	ret = genradix_prealloc(&stream->in, incnt, gfp);
122
+	if (ret)
123
+		return ret;
204
124
 
205
-	if (incnt > stream->incnt)
206
-		fa_zero(in, stream->incnt, (incnt - stream->incnt));
207
-
208
-	stream->in = in;
209
-
125
+out:
126
+	stream->incnt = incnt;
210
127
 	return 0;
211
128
 }
212
129
 
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@@ -222,7 +139,7 @@
222
139
 	 * a new one with new outcnt to save memory if needed.
223
140
 	 */
224
141
 	if (outcnt == stream->outcnt)
225
-		goto in;
142
+		goto handle_in;
226
143
 
227
144
 	/* Filter out chunks queued on streams that won't exist anymore */
228
145
 	sched->unsched_all(stream);
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@@ -231,30 +148,17 @@
231
148
 
232
149
 	ret = sctp_stream_alloc_out(stream, outcnt, gfp);
233
150
 	if (ret)
234
-		goto out;
151
+		return ret;
235
152
 
236
-	stream->outcnt = outcnt;
237
153
 	for (i = 0; i < stream->outcnt; i++)
238
154
 		SCTP_SO(stream, i)->state = SCTP_STREAM_OPEN;
239
155
 
240
-in:
156
+handle_in:
241
157
 	sctp_stream_interleave_init(stream);
242
158
 	if (!incnt)
243
-		goto out;
159
+		return 0;
244
160
 
245
-	ret = sctp_stream_alloc_in(stream, incnt, gfp);
246
-	if (ret) {
247
-		sched->free(stream);
248
-		fa_free(stream->out);
249
-		stream->out = NULL;
250
-		stream->outcnt = 0;
251
-		goto out;
252
-	}
253
-
254
-	stream->incnt = incnt;
255
-
256
-out:
257
-	return ret;
161
+	return sctp_stream_alloc_in(stream, incnt, gfp);
258
162
 }
259
163
 
260
164
 int sctp_stream_init_ext(struct sctp_stream *stream, __u16 sid)
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..
@@ -281,11 +185,11 @@
281
185
 	struct sctp_sched_ops *sched = sctp_sched_ops_from_stream(stream);
282
186
 	int i;
283
187
 
284
-	sched->free(stream);
188
+	sched->unsched_all(stream);
285
189
 	for (i = 0; i < stream->outcnt; i++)
286
-		kfree(SCTP_SO(stream, i)->ext);
287
-	fa_free(stream->out);
288
-	fa_free(stream->in);
190
+		sctp_stream_free_ext(stream, i);
191
+	genradix_free(&stream->out);
192
+	genradix_free(&stream->in);
289
193
 }
290
194
 
291
195
 void sctp_stream_clear(struct sctp_stream *stream)
..
..
@@ -316,8 +220,8 @@
316
220
 
317
221
 	sched->sched_all(stream);
318
222
 
319
-	new->out = NULL;
320
-	new->in  = NULL;
223
+	new->out.tree.root = NULL;
224
+	new->in.tree.root  = NULL;
321
225
 	new->outcnt = 0;
322
226
 	new->incnt  = 0;
323
227
 }
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..
@@ -325,10 +229,9 @@
325
229
 static int sctp_send_reconf(struct sctp_association *asoc,
326
230
 			    struct sctp_chunk *chunk)
327
231
 {
328
-	struct net *net = sock_net(asoc->base.sk);
329
232
 	int retval = 0;
330
233
 
331
-	retval = sctp_primitive_RECONF(net, asoc, chunk);
234
+	retval = sctp_primitive_RECONF(asoc->base.net, asoc, chunk);
332
235
 	if (retval)
333
236
 		sctp_chunk_free(chunk);
334
237
 
..
..
@@ -569,8 +472,6 @@
569
472
 		asoc->strreset_chunk = NULL;
570
473
 		goto out;
571
474
 	}
572
-
573
-	stream->outcnt = outcnt;
574
475
 
575
476
 	asoc->strreset_outstanding = !!out + !!in;
576
477