1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Copyright (c) 2020 Anna Schumaker <Anna.Schumaker@Netapp.com>
4 */
5 #include <linux/sunrpc/clnt.h>
6 #include <linux/kobject.h>
7 #include <linux/sunrpc/addr.h>
8 #include <linux/sunrpc/xprtsock.h>
9
10 #include "sysfs.h"
11
12 struct xprt_addr {
13 const char *addr;
14 struct rcu_head rcu;
15 };
16
17 static void free_xprt_addr(struct rcu_head *head)
18 {
19 struct xprt_addr *addr = container_of(head, struct xprt_addr, rcu);
20
21 kfree(addr->addr);
22 kfree(addr);
23 }
24
25 static struct kset *rpc_sunrpc_kset;
26 static struct kobject *rpc_sunrpc_client_kobj, *rpc_sunrpc_xprt_switch_kobj;
27
28 static void rpc_sysfs_object_release(struct kobject *kobj)
29 {
30 kfree(kobj);
31 }
32
33 static const struct kobj_ns_type_operations *
34 rpc_sysfs_object_child_ns_type(struct kobject *kobj)
35 {
36 return &net_ns_type_operations;
37 }
38
39 static struct kobj_type rpc_sysfs_object_type = {
40 .release = rpc_sysfs_object_release,
41 .sysfs_ops = &kobj_sysfs_ops,
42 .child_ns_type = rpc_sysfs_object_child_ns_type,
43 };
44
45 static struct kobject *rpc_sysfs_object_alloc(const char *name,
46 struct kset *kset,
47 struct kobject *parent)
48 {
49 struct kobject *kobj;
50
51 kobj = kzalloc(sizeof(*kobj), GFP_KERNEL);
52 if (kobj) {
53 kobj->kset = kset;
54 if (kobject_init_and_add(kobj, &rpc_sysfs_object_type,
55 parent, "%s", name) == 0)
56 return kobj;
57 kobject_put(kobj);
58 }
59 return NULL;
60 }
61
62 static inline struct rpc_xprt *
63 rpc_sysfs_xprt_kobj_get_xprt(struct kobject *kobj)
64 {
65 struct rpc_sysfs_xprt *x = container_of(kobj,
66 struct rpc_sysfs_xprt, kobject);
67
68 return xprt_get(x->xprt);
69 }
70
71 static inline struct rpc_xprt_switch *
72 rpc_sysfs_xprt_kobj_get_xprt_switch(struct kobject *kobj)
73 {
74 struct rpc_sysfs_xprt *x = container_of(kobj,
75 struct rpc_sysfs_xprt, kobject);
76
77 return xprt_switch_get(x->xprt_switch);
78 }
79
80 static inline struct rpc_xprt_switch *
81 rpc_sysfs_xprt_switch_kobj_get_xprt(struct kobject *kobj)
82 {
83 struct rpc_sysfs_xprt_switch *x = container_of(kobj,
84 struct rpc_sysfs_xprt_switch, kobject);
85
86 return xprt_switch_get(x->xprt_switch);
87 }
88
89 static ssize_t rpc_sysfs_xprt_dstaddr_show(struct kobject *kobj,
90 struct kobj_attribute *attr,
91 char *buf)
92 {
93 struct rpc_xprt *xprt = rpc_sysfs_xprt_kobj_get_xprt(kobj);
94 ssize_t ret;
95
96 if (!xprt) {
97 ret = sprintf(buf, "<closed>\n");
98 goto out;
99 }
100 ret = sprintf(buf, "%s\n", xprt->address_strings[RPC_DISPLAY_ADDR]);
101 xprt_put(xprt);
102 out:
103 return ret;
104 }
105
106 static ssize_t rpc_sysfs_xprt_srcaddr_show(struct kobject *kobj,
107 struct kobj_attribute *attr,
108 char *buf)
109 {
110 struct rpc_xprt *xprt = rpc_sysfs_xprt_kobj_get_xprt(kobj);
111 size_t buflen = PAGE_SIZE;
112 ssize_t ret;
113
114 if (!xprt || !xprt_connected(xprt)) {
115 ret = sprintf(buf, "<closed>\n");
116 } else if (xprt->ops->get_srcaddr) {
117 ret = xprt->ops->get_srcaddr(xprt, buf, buflen);
118 if (ret > 0) {
119 if (ret < buflen - 1) {
120 buf[ret] = '\n';
121 ret++;
122 buf[ret] = '\0';
123 }
124 } else
125 ret = sprintf(buf, "<closed>\n");
126 } else
127 ret = sprintf(buf, "<not a socket>\n");
128 xprt_put(xprt);
129 return ret;
130 }
131
132 static ssize_t rpc_sysfs_xprt_info_show(struct kobject *kobj,
133 struct kobj_attribute *attr, char *buf)
134 {
135 struct rpc_xprt *xprt = rpc_sysfs_xprt_kobj_get_xprt(kobj);
136 unsigned short srcport = 0;
137 size_t buflen = PAGE_SIZE;
138 ssize_t ret;
139
140 if (!xprt || !xprt_connected(xprt)) {
141 ret = sprintf(buf, "<closed>\n");
142 goto out;
143 }
144
145 if (xprt->ops->get_srcport)
146 srcport = xprt->ops->get_srcport(xprt);
147
148 ret = snprintf(buf, buflen,
149 "last_used=%lu\ncur_cong=%lu\ncong_win=%lu\n"
150 "max_num_slots=%u\nmin_num_slots=%u\nnum_reqs=%u\n"
151 "binding_q_len=%u\nsending_q_len=%u\npending_q_len=%u\n"
152 "backlog_q_len=%u\nmain_xprt=%d\nsrc_port=%u\n"
153 "tasks_queuelen=%ld\ndst_port=%s\n",
154 xprt->last_used, xprt->cong, xprt->cwnd, xprt->max_reqs,
155 xprt->min_reqs, xprt->num_reqs, xprt->binding.qlen,
156 xprt->sending.qlen, xprt->pending.qlen,
157 xprt->backlog.qlen, xprt->main, srcport,
158 atomic_long_read(&xprt->queuelen),
159 xprt->address_strings[RPC_DISPLAY_PORT]);
160 out:
161 xprt_put(xprt);
162 return ret;
163 }
164
165 static ssize_t rpc_sysfs_xprt_state_show(struct kobject *kobj,
166 struct kobj_attribute *attr,
167 char *buf)
168 {
169 struct rpc_xprt *xprt = rpc_sysfs_xprt_kobj_get_xprt(kobj);
170 ssize_t ret;
171 int locked, connected, connecting, close_wait, bound, binding,
172 closing, congested, cwnd_wait, write_space, offline, remove;
173
174 if (!(xprt && xprt->state)) {
175 ret = sprintf(buf, "state=CLOSED\n");
176 } else {
177 locked = test_bit(XPRT_LOCKED, &xprt->state);
178 connected = test_bit(XPRT_CONNECTED, &xprt->state);
179 connecting = test_bit(XPRT_CONNECTING, &xprt->state);
180 close_wait = test_bit(XPRT_CLOSE_WAIT, &xprt->state);
181 bound = test_bit(XPRT_BOUND, &xprt->state);
182 binding = test_bit(XPRT_BINDING, &xprt->state);
183 closing = test_bit(XPRT_CLOSING, &xprt->state);
184 congested = test_bit(XPRT_CONGESTED, &xprt->state);
185 cwnd_wait = test_bit(XPRT_CWND_WAIT, &xprt->state);
186 write_space = test_bit(XPRT_WRITE_SPACE, &xprt->state);
187 offline = test_bit(XPRT_OFFLINE, &xprt->state);
188 remove = test_bit(XPRT_REMOVE, &xprt->state);
189
190 ret = sprintf(buf, "state=%s %s %s %s %s %s %s %s %s %s %s %s\n",
191 locked ? "LOCKED" : "",
192 connected ? "CONNECTED" : "",
193 connecting ? "CONNECTING" : "",
194 close_wait ? "CLOSE_WAIT" : "",
195 bound ? "BOUND" : "",
196 binding ? "BOUNDING" : "",
197 closing ? "CLOSING" : "",
198 congested ? "CONGESTED" : "",
199 cwnd_wait ? "CWND_WAIT" : "",
200 write_space ? "WRITE_SPACE" : "",
201 offline ? "OFFLINE" : "",
202 remove ? "REMOVE" : "");
203 }
204
205 xprt_put(xprt);
206 return ret;
207 }
208
209 static ssize_t rpc_sysfs_xprt_switch_info_show(struct kobject *kobj,
210 struct kobj_attribute *attr,
211 char *buf)
212 {
213 struct rpc_xprt_switch *xprt_switch =
214 rpc_sysfs_xprt_switch_kobj_get_xprt(kobj);
215 ssize_t ret;
216
217 if (!xprt_switch)
218 return 0;
219 ret = sprintf(buf, "num_xprts=%u\nnum_active=%u\n"
220 "num_unique_destaddr=%u\nqueue_len=%ld\n",
221 xprt_switch->xps_nxprts, xprt_switch->xps_nactive,
222 xprt_switch->xps_nunique_destaddr_xprts,
223 atomic_long_read(&xprt_switch->xps_queuelen));
224 xprt_switch_put(xprt_switch);
225 return ret;
226 }
227
228 static ssize_t rpc_sysfs_xprt_dstaddr_store(struct kobject *kobj,
229 struct kobj_attribute *attr,
230 const char *buf, size_t count)
231 {
232 struct rpc_xprt *xprt = rpc_sysfs_xprt_kobj_get_xprt(kobj);
233 struct sockaddr *saddr;
234 char *dst_addr;
235 int port;
236 struct xprt_addr *saved_addr;
237 size_t buf_len;
238
239 if (!xprt)
240 return 0;
241 if (!(xprt->xprt_class->ident == XPRT_TRANSPORT_TCP ||
242 xprt->xprt_class->ident == XPRT_TRANSPORT_RDMA)) {
243 xprt_put(xprt);
244 return -EOPNOTSUPP;
245 }
246
247 if (wait_on_bit_lock(&xprt->state, XPRT_LOCKED, TASK_KILLABLE)) {
248 count = -EINTR;
249 goto out_put;
250 }
251 saddr = (struct sockaddr *)&xprt->addr;
252 port = rpc_get_port(saddr);
253
254 /* buf_len is the len until the first occurence of either
255 * '\n' or '\0'
256 */
257 buf_len = strcspn(buf, "\n");
258
259 dst_addr = kstrndup(buf, buf_len, GFP_KERNEL);
260 if (!dst_addr)
261 goto out_err;
262 saved_addr = kzalloc(sizeof(*saved_addr), GFP_KERNEL);
263 if (!saved_addr)
264 goto out_err_free;
265 saved_addr->addr =
266 rcu_dereference_raw(xprt->address_strings[RPC_DISPLAY_ADDR]);
267 rcu_assign_pointer(xprt->address_strings[RPC_DISPLAY_ADDR], dst_addr);
268 call_rcu(&saved_addr->rcu, free_xprt_addr);
269 xprt->addrlen = rpc_pton(xprt->xprt_net, buf, buf_len, saddr,
270 sizeof(*saddr));
271 rpc_set_port(saddr, port);
272
273 xprt_force_disconnect(xprt);
274 out:
275 xprt_release_write(xprt, NULL);
276 out_put:
277 xprt_put(xprt);
278 return count;
279 out_err_free:
280 kfree(dst_addr);
281 out_err:
282 count = -ENOMEM;
283 goto out;
284 }
285
286 static ssize_t rpc_sysfs_xprt_state_change(struct kobject *kobj,
287 struct kobj_attribute *attr,
288 const char *buf, size_t count)
289 {
290 struct rpc_xprt *xprt = rpc_sysfs_xprt_kobj_get_xprt(kobj);
291 int offline = 0, online = 0, remove = 0;
292 struct rpc_xprt_switch *xps = rpc_sysfs_xprt_kobj_get_xprt_switch(kobj);
293
294 if (!xprt || !xps) {
295 count = 0;
296 goto out_put;
297 }
298
299 if (!strncmp(buf, "offline", 7))
300 offline = 1;
301 else if (!strncmp(buf, "online", 6))
302 online = 1;
303 else if (!strncmp(buf, "remove", 6))
304 remove = 1;
305 else {
306 count = -EINVAL;
307 goto out_put;
308 }
309
310 if (wait_on_bit_lock(&xprt->state, XPRT_LOCKED, TASK_KILLABLE)) {
311 count = -EINTR;
312 goto out_put;
313 }
314 if (xprt->main) {
315 count = -EINVAL;
316 goto release_tasks;
317 }
318 if (offline) {
319 if (!test_and_set_bit(XPRT_OFFLINE, &xprt->state)) {
320 spin_lock(&xps->xps_lock);
321 xps->xps_nactive--;
322 spin_unlock(&xps->xps_lock);
323 }
324 } else if (online) {
325 if (test_and_clear_bit(XPRT_OFFLINE, &xprt->state)) {
326 spin_lock(&xps->xps_lock);
327 xps->xps_nactive++;
328 spin_unlock(&xps->xps_lock);
329 }
330 } else if (remove) {
331 if (test_bit(XPRT_OFFLINE, &xprt->state)) {
332 if (!test_and_set_bit(XPRT_REMOVE, &xprt->state)) {
333 xprt_force_disconnect(xprt);
334 if (test_bit(XPRT_CONNECTED, &xprt->state)) {
335 if (!xprt->sending.qlen &&
336 !xprt->pending.qlen &&
337 !xprt->backlog.qlen &&
338 !atomic_long_read(&xprt->queuelen))
339 rpc_xprt_switch_remove_xprt(xps, xprt);
340 }
341 }
342 } else {
343 count = -EINVAL;
344 }
345 }
346
347 release_tasks:
348 xprt_release_write(xprt, NULL);
349 out_put:
350 xprt_put(xprt);
351 xprt_switch_put(xps);
352 return count;
353 }
354
355 int rpc_sysfs_init(void)
356 {
357 rpc_sunrpc_kset = kset_create_and_add("sunrpc", NULL, kernel_kobj);
358 if (!rpc_sunrpc_kset)
359 return -ENOMEM;
360 rpc_sunrpc_client_kobj =
361 rpc_sysfs_object_alloc("rpc-clients", rpc_sunrpc_kset, NULL);
362 if (!rpc_sunrpc_client_kobj)
363 goto err_client;
364 rpc_sunrpc_xprt_switch_kobj =
365 rpc_sysfs_object_alloc("xprt-switches", rpc_sunrpc_kset, NULL);
366 if (!rpc_sunrpc_xprt_switch_kobj)
367 goto err_switch;
368 return 0;
369 err_switch:
370 kobject_put(rpc_sunrpc_client_kobj);
371 rpc_sunrpc_client_kobj = NULL;
372 err_client:
373 kset_unregister(rpc_sunrpc_kset);
374 rpc_sunrpc_kset = NULL;
375 return -ENOMEM;
376 }
377
378 static void rpc_sysfs_client_release(struct kobject *kobj)
379 {
380 struct rpc_sysfs_client *c;
381
382 c = container_of(kobj, struct rpc_sysfs_client, kobject);
383 kfree(c);
384 }
385
386 static void rpc_sysfs_xprt_switch_release(struct kobject *kobj)
387 {
388 struct rpc_sysfs_xprt_switch *xprt_switch;
389
390 xprt_switch = container_of(kobj, struct rpc_sysfs_xprt_switch, kobject);
391 kfree(xprt_switch);
392 }
393
394 static void rpc_sysfs_xprt_release(struct kobject *kobj)
395 {
396 struct rpc_sysfs_xprt *xprt;
397
398 xprt = container_of(kobj, struct rpc_sysfs_xprt, kobject);
399 kfree(xprt);
400 }
401
402 static const void *rpc_sysfs_client_namespace(struct kobject *kobj)
403 {
404 return container_of(kobj, struct rpc_sysfs_client, kobject)->net;
405 }
406
407 static const void *rpc_sysfs_xprt_switch_namespace(struct kobject *kobj)
408 {
409 return container_of(kobj, struct rpc_sysfs_xprt_switch, kobject)->net;
410 }
411
412 static const void *rpc_sysfs_xprt_namespace(struct kobject *kobj)
413 {
414 return container_of(kobj, struct rpc_sysfs_xprt,
415 kobject)->xprt->xprt_net;
416 }
417
418 static struct kobj_attribute rpc_sysfs_xprt_dstaddr = __ATTR(dstaddr,
419 0644, rpc_sysfs_xprt_dstaddr_show, rpc_sysfs_xprt_dstaddr_store);
420
421 static struct kobj_attribute rpc_sysfs_xprt_srcaddr = __ATTR(srcaddr,
422 0644, rpc_sysfs_xprt_srcaddr_show, NULL);
423
424 static struct kobj_attribute rpc_sysfs_xprt_info = __ATTR(xprt_info,
425 0444, rpc_sysfs_xprt_info_show, NULL);
426
427 static struct kobj_attribute rpc_sysfs_xprt_change_state = __ATTR(xprt_state,
428 0644, rpc_sysfs_xprt_state_show, rpc_sysfs_xprt_state_change);
429
430 static struct attribute *rpc_sysfs_xprt_attrs[] = {
431 &rpc_sysfs_xprt_dstaddr.attr,
432 &rpc_sysfs_xprt_srcaddr.attr,
433 &rpc_sysfs_xprt_info.attr,
434 &rpc_sysfs_xprt_change_state.attr,
435 NULL,
436 };
437 ATTRIBUTE_GROUPS(rpc_sysfs_xprt);
438
439 static struct kobj_attribute rpc_sysfs_xprt_switch_info =
440 __ATTR(xprt_switch_info, 0444, rpc_sysfs_xprt_switch_info_show, NULL);
441
442 static struct attribute *rpc_sysfs_xprt_switch_attrs[] = {
443 &rpc_sysfs_xprt_switch_info.attr,
444 NULL,
445 };
446 ATTRIBUTE_GROUPS(rpc_sysfs_xprt_switch);
447
448 static struct kobj_type rpc_sysfs_client_type = {
449 .release = rpc_sysfs_client_release,
450 .sysfs_ops = &kobj_sysfs_ops,
451 .namespace = rpc_sysfs_client_namespace,
452 };
453
454 static struct kobj_type rpc_sysfs_xprt_switch_type = {
455 .release = rpc_sysfs_xprt_switch_release,
456 .default_groups = rpc_sysfs_xprt_switch_groups,
457 .sysfs_ops = &kobj_sysfs_ops,
458 .namespace = rpc_sysfs_xprt_switch_namespace,
459 };
460
461 static struct kobj_type rpc_sysfs_xprt_type = {
462 .release = rpc_sysfs_xprt_release,
463 .default_groups = rpc_sysfs_xprt_groups,
464 .sysfs_ops = &kobj_sysfs_ops,
465 .namespace = rpc_sysfs_xprt_namespace,
466 };
467
468 void rpc_sysfs_exit(void)
469 {
470 kobject_put(rpc_sunrpc_client_kobj);
471 kobject_put(rpc_sunrpc_xprt_switch_kobj);
472 kset_unregister(rpc_sunrpc_kset);
473 }
474
475 static struct rpc_sysfs_client *rpc_sysfs_client_alloc(struct kobject *parent,
476 struct net *net,
477 int clid)
478 {
479 struct rpc_sysfs_client *p;
480
481 p = kzalloc(sizeof(*p), GFP_KERNEL);
482 if (p) {
483 p->net = net;
484 p->kobject.kset = rpc_sunrpc_kset;
485 if (kobject_init_and_add(&p->kobject, &rpc_sysfs_client_type,
486 parent, "clnt-%d", clid) == 0)
487 return p;
488 kobject_put(&p->kobject);
489 }
490 return NULL;
491 }
492
493 static struct rpc_sysfs_xprt_switch *
494 rpc_sysfs_xprt_switch_alloc(struct kobject *parent,
495 struct rpc_xprt_switch *xprt_switch,
496 struct net *net,
497 gfp_t gfp_flags)
498 {
499 struct rpc_sysfs_xprt_switch *p;
500
501 p = kzalloc(sizeof(*p), gfp_flags);
502 if (p) {
503 p->net = net;
504 p->kobject.kset = rpc_sunrpc_kset;
505 if (kobject_init_and_add(&p->kobject,
506 &rpc_sysfs_xprt_switch_type,
507 parent, "switch-%d",
508 xprt_switch->xps_id) == 0)
509 return p;
510 kobject_put(&p->kobject);
511 }
512 return NULL;
513 }
514
515 static struct rpc_sysfs_xprt *rpc_sysfs_xprt_alloc(struct kobject *parent,
516 struct rpc_xprt *xprt,
517 gfp_t gfp_flags)
518 {
519 struct rpc_sysfs_xprt *p;
520
521 p = kzalloc(sizeof(*p), gfp_flags);
522 if (!p)
523 goto out;
524 p->kobject.kset = rpc_sunrpc_kset;
525 if (kobject_init_and_add(&p->kobject, &rpc_sysfs_xprt_type,
526 parent, "xprt-%d-%s", xprt->id,
527 xprt->address_strings[RPC_DISPLAY_PROTO]) == 0)
528 return p;
529 kobject_put(&p->kobject);
530 out:
531 return NULL;
532 }
533
534 void rpc_sysfs_client_setup(struct rpc_clnt *clnt,
535 struct rpc_xprt_switch *xprt_switch,
536 struct net *net)
537 {
538 struct rpc_sysfs_client *rpc_client;
539
540 rpc_client = rpc_sysfs_client_alloc(rpc_sunrpc_client_kobj,
541 net, clnt->cl_clid);
542 if (rpc_client) {
543 char name[] = "switch";
544 struct rpc_sysfs_xprt_switch *xswitch =
545 (struct rpc_sysfs_xprt_switch *)xprt_switch->xps_sysfs;
546 int ret;
547
548 clnt->cl_sysfs = rpc_client;
549 rpc_client->clnt = clnt;
550 rpc_client->xprt_switch = xprt_switch;
551 kobject_uevent(&rpc_client->kobject, KOBJ_ADD);
552 ret = sysfs_create_link_nowarn(&rpc_client->kobject,
553 &xswitch->kobject, name);
554 if (ret)
555 pr_warn("can't create link to %s in sysfs (%d)\n",
556 name, ret);
557 }
558 }
559
560 void rpc_sysfs_xprt_switch_setup(struct rpc_xprt_switch *xprt_switch,
561 struct rpc_xprt *xprt,
562 gfp_t gfp_flags)
563 {
564 struct rpc_sysfs_xprt_switch *rpc_xprt_switch;
565 struct net *net;
566
567 if (xprt_switch->xps_net)
568 net = xprt_switch->xps_net;
569 else
570 net = xprt->xprt_net;
571 rpc_xprt_switch =
572 rpc_sysfs_xprt_switch_alloc(rpc_sunrpc_xprt_switch_kobj,
573 xprt_switch, net, gfp_flags);
574 if (rpc_xprt_switch) {
575 xprt_switch->xps_sysfs = rpc_xprt_switch;
576 rpc_xprt_switch->xprt_switch = xprt_switch;
577 rpc_xprt_switch->xprt = xprt;
578 kobject_uevent(&rpc_xprt_switch->kobject, KOBJ_ADD);
579 }
580 }
581
582 void rpc_sysfs_xprt_setup(struct rpc_xprt_switch *xprt_switch,
583 struct rpc_xprt *xprt,
584 gfp_t gfp_flags)
585 {
586 struct rpc_sysfs_xprt *rpc_xprt;
587 struct rpc_sysfs_xprt_switch *switch_obj =
588 (struct rpc_sysfs_xprt_switch *)xprt_switch->xps_sysfs;
589
590 rpc_xprt = rpc_sysfs_xprt_alloc(&switch_obj->kobject, xprt, gfp_flags);
591 if (rpc_xprt) {
592 xprt->xprt_sysfs = rpc_xprt;
593 rpc_xprt->xprt = xprt;
594 rpc_xprt->xprt_switch = xprt_switch;
595 kobject_uevent(&rpc_xprt->kobject, KOBJ_ADD);
596 }
597 }
598
599 void rpc_sysfs_client_destroy(struct rpc_clnt *clnt)
600 {
601 struct rpc_sysfs_client *rpc_client = clnt->cl_sysfs;
602
603 if (rpc_client) {
604 char name[] = "switch";
605
606 sysfs_remove_link(&rpc_client->kobject, name);
607 kobject_uevent(&rpc_client->kobject, KOBJ_REMOVE);
608 kobject_del(&rpc_client->kobject);
609 kobject_put(&rpc_client->kobject);
610 clnt->cl_sysfs = NULL;
611 }
612 }
613
614 void rpc_sysfs_xprt_switch_destroy(struct rpc_xprt_switch *xprt_switch)
615 {
616 struct rpc_sysfs_xprt_switch *rpc_xprt_switch = xprt_switch->xps_sysfs;
617
618 if (rpc_xprt_switch) {
619 kobject_uevent(&rpc_xprt_switch->kobject, KOBJ_REMOVE);
620 kobject_del(&rpc_xprt_switch->kobject);
621 kobject_put(&rpc_xprt_switch->kobject);
622 xprt_switch->xps_sysfs = NULL;
623 }
624 }
625
626 void rpc_sysfs_xprt_destroy(struct rpc_xprt *xprt)
627 {
628 struct rpc_sysfs_xprt *rpc_xprt = xprt->xprt_sysfs;
629
630 if (rpc_xprt) {
631 kobject_uevent(&rpc_xprt->kobject, KOBJ_REMOVE);
632 kobject_del(&rpc_xprt->kobject);
633 kobject_put(&rpc_xprt->kobject);
634 xprt->xprt_sysfs = NULL;
635 }
636 }
637
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