change wifi driver to cypress

hc

2024-01-05 071106ecf68c401173c58808b1cf5f68cc50d390

 kernel/fs/afs/security.c
..
..
@@ -1,12 +1,8 @@
1
+// SPDX-License-Identifier: GPL-2.0-or-later
1
2
 /* AFS security handling
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3
  *
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4
  * Copyright (C) 2007, 2017 Red Hat, Inc. All Rights Reserved.
4
5
  * Written by David Howells (dhowells@redhat.com)
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- *
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- * This program is free software; you can redistribute it and/or
7
- * modify it under the terms of the GNU General Public License
8
- * as published by the Free Software Foundation; either version
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- * 2 of the License, or (at your option) any later version.
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6
  */
11
7
 
12
8
 #include <linux/init.h>
..
..
@@ -31,8 +27,37 @@
31
27
 	_enter("{%x}", key_serial(cell->anonymous_key));
32
28
 
33
29
 	_debug("key %s", cell->anonymous_key->description);
34
-	key = request_key(&key_type_rxrpc, cell->anonymous_key->description,
35
-			  NULL);
30
+	key = request_key_net(&key_type_rxrpc, cell->anonymous_key->description,
31
+			      cell->net->net, NULL);
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+	if (IS_ERR(key)) {
33
+		if (PTR_ERR(key) != -ENOKEY) {
34
+			_leave(" = %ld", PTR_ERR(key));
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+			return key;
36
+		}
37
+
38
+		/* act as anonymous user */
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+		_leave(" = {%x} [anon]", key_serial(cell->anonymous_key));
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+		return key_get(cell->anonymous_key);
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+	} else {
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+		/* act as authorised user */
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+		_leave(" = {%x} [auth]", key_serial(key));
44
+		return key;
45
+	}
46
+}
47
+
48
+/*
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+ * Get a key when pathwalk is in rcuwalk mode.
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+ */
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+struct key *afs_request_key_rcu(struct afs_cell *cell)
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+{
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+	struct key *key;
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+
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+	_enter("{%x}", key_serial(cell->anonymous_key));
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+
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+	_debug("key %s", cell->anonymous_key->description);
58
+	key = request_key_net_rcu(&key_type_rxrpc,
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+				  cell->anonymous_key->description,
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+				  cell->net->net);
36
61
 	if (IS_ERR(key)) {
37
62
 		if (PTR_ERR(key) != -ENOKEY) {
38
63
 			_leave(" = %ld", PTR_ERR(key));
..
..
@@ -116,15 +141,15 @@
116
141
  * as the ACL *may* have changed.
117
142
  */
118
143
 void afs_cache_permit(struct afs_vnode *vnode, struct key *key,
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-		      unsigned int cb_break)
144
+		      unsigned int cb_break, struct afs_status_cb *scb)
120
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 {
121
146
 	struct afs_permits *permits, *xpermits, *replacement, *zap, *new = NULL;
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-	afs_access_t caller_access = READ_ONCE(vnode->status.caller_access);
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+	afs_access_t caller_access = scb->status.caller_access;
123
148
 	size_t size = 0;
124
149
 	bool changed = false;
125
150
 	int i, j;
126
151
 
127
-	_enter("{%x:%u},%x,%x",
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+	_enter("{%llx:%llu},%x,%x",
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153
 	       vnode->fid.vid, vnode->fid.vnode, key_serial(key), caller_access);
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154
 
130
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 	rcu_read_lock();
..
..
@@ -145,7 +170,7 @@
145
170
 					break;
146
171
 				}
147
172
 
148
-				if (cb_break != afs_cb_break_sum(vnode, vnode->cb_interest)) {
173
+				if (afs_cb_is_broken(cb_break, vnode)) {
149
174
 					changed = true;
150
175
 					break;
151
176
 				}
..
..
@@ -175,7 +200,7 @@
175
200
 		}
176
201
 	}
177
202
 
178
-	if (cb_break != afs_cb_break_sum(vnode, vnode->cb_interest))
203
+	if (afs_cb_is_broken(cb_break, vnode))
179
204
 		goto someone_else_changed_it;
180
205
 
181
206
 	/* We need a ref on any permits list we want to copy as we'll have to
..
..
@@ -252,14 +277,15 @@
252
277
 
253
278
 	kfree(new);
254
279
 
280
+	rcu_read_lock();
255
281
 	spin_lock(&vnode->lock);
256
282
 	zap = rcu_access_pointer(vnode->permit_cache);
257
-	if (cb_break == afs_cb_break_sum(vnode, vnode->cb_interest) &&
258
-	    zap == permits)
283
+	if (!afs_cb_is_broken(cb_break, vnode) && zap == permits)
259
284
 		rcu_assign_pointer(vnode->permit_cache, replacement);
260
285
 	else
261
286
 		zap = replacement;
262
287
 	spin_unlock(&vnode->lock);
288
+	rcu_read_unlock();
263
289
 	afs_put_permits(zap);
264
290
 out_put:
265
291
 	afs_put_permits(permits);
..
..
@@ -275,6 +301,40 @@
275
301
 	return;
276
302
 }
277
303
 
304
+static bool afs_check_permit_rcu(struct afs_vnode *vnode, struct key *key,
305
+				 afs_access_t *_access)
306
+{
307
+	const struct afs_permits *permits;
308
+	int i;
309
+
310
+	_enter("{%llx:%llu},%x",
311
+	       vnode->fid.vid, vnode->fid.vnode, key_serial(key));
312
+
313
+	/* check the permits to see if we've got one yet */
314
+	if (key == vnode->volume->cell->anonymous_key) {
315
+		*_access = vnode->status.anon_access;
316
+		_leave(" = t [anon %x]", *_access);
317
+		return true;
318
+	}
319
+
320
+	permits = rcu_dereference(vnode->permit_cache);
321
+	if (permits) {
322
+		for (i = 0; i < permits->nr_permits; i++) {
323
+			if (permits->permits[i].key < key)
324
+				continue;
325
+			if (permits->permits[i].key > key)
326
+				break;
327
+
328
+			*_access = permits->permits[i].access;
329
+			_leave(" = %u [perm %x]", !permits->invalidated, *_access);
330
+			return !permits->invalidated;
331
+		}
332
+	}
333
+
334
+	_leave(" = f");
335
+	return false;
336
+}
337
+
278
338
 /*
279
339
  * check with the fileserver to see if the directory or parent directory is
280
340
  * permitted to be accessed with this authorisation, and if so, what access it
..
..
@@ -287,7 +347,7 @@
287
347
 	bool valid = false;
288
348
 	int i, ret;
289
349
 
290
-	_enter("{%x:%u},%x",
350
+	_enter("{%llx:%llu},%x",
291
351
 	       vnode->fid.vid, vnode->fid.vnode, key_serial(key));
292
352
 
293
353
 	/* check the permits to see if we've got one yet */
..
..
@@ -319,13 +379,12 @@
319
379
 		 */
320
380
 		_debug("no valid permit");
321
381
 
322
-		ret = afs_fetch_status(vnode, key, false);
382
+		ret = afs_fetch_status(vnode, key, false, _access);
323
383
 		if (ret < 0) {
324
384
 			*_access = 0;
325
385
 			_leave(" = %d", ret);
326
386
 			return ret;
327
387
 		}
328
-		*_access = vnode->status.caller_access;
329
388
 	}
330
389
 
331
390
 	_leave(" = 0 [access %x]", *_access);
..
..
@@ -340,35 +399,44 @@
340
399
 int afs_permission(struct inode *inode, int mask)
341
400
 {
342
401
 	struct afs_vnode *vnode = AFS_FS_I(inode);
343
-	afs_access_t uninitialized_var(access);
402
+	afs_access_t access;
344
403
 	struct key *key;
345
-	int ret;
404
+	int ret = 0;
346
405
 
347
-	if (mask & MAY_NOT_BLOCK)
348
-		return -ECHILD;
349
-
350
-	_enter("{{%x:%u},%lx},%x,",
406
+	_enter("{{%llx:%llu},%lx},%x,",
351
407
 	       vnode->fid.vid, vnode->fid.vnode, vnode->flags, mask);
352
408
 
353
-	key = afs_request_key(vnode->volume->cell);
354
-	if (IS_ERR(key)) {
355
-		_leave(" = %ld [key]", PTR_ERR(key));
356
-		return PTR_ERR(key);
409
+	if (mask & MAY_NOT_BLOCK) {
410
+		key = afs_request_key_rcu(vnode->volume->cell);
411
+		if (IS_ERR(key))
412
+			return -ECHILD;
413
+
414
+		ret = -ECHILD;
415
+		if (!afs_check_validity(vnode) ||
416
+		    !afs_check_permit_rcu(vnode, key, &access))
417
+			goto error;
418
+	} else {
419
+		key = afs_request_key(vnode->volume->cell);
420
+		if (IS_ERR(key)) {
421
+			_leave(" = %ld [key]", PTR_ERR(key));
422
+			return PTR_ERR(key);
423
+		}
424
+
425
+		ret = afs_validate(vnode, key);
426
+		if (ret < 0)
427
+			goto error;
428
+
429
+		/* check the permits to see if we've got one yet */
430
+		ret = afs_check_permit(vnode, key, &access);
431
+		if (ret < 0)
432
+			goto error;
357
433
 	}
358
-
359
-	ret = afs_validate(vnode, key);
360
-	if (ret < 0)
361
-		goto error;
362
-
363
-	/* check the permits to see if we've got one yet */
364
-	ret = afs_check_permit(vnode, key, &access);
365
-	if (ret < 0)
366
-		goto error;
367
434
 
368
435
 	/* interpret the access mask */
369
436
 	_debug("REQ %x ACC %x on %s",
370
437
 	       mask, access, S_ISDIR(inode->i_mode) ? "dir" : "file");
371
438
 
439
+	ret = 0;
372
440
 	if (S_ISDIR(inode->i_mode)) {
373
441
 		if (mask & (MAY_EXEC | MAY_READ | MAY_CHDIR)) {
374
442
 			if (!(access & AFS_ACE_LOOKUP))