1 // SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
2 /*
3 * Copyright (c) 2018, Mellanox Technologies inc. All rights reserved.
4 */
5
6 #include <linux/overflow.h>
7 #include <rdma/uverbs_std_types.h>
8 #include "rdma_core.h"
9 #include "uverbs.h"
10 #include <rdma/uverbs_ioctl.h>
11 #include <rdma/opa_addr.h>
12 #include <rdma/ib_cache.h>
13
14 /*
15 * This ioctl method allows calling any defined write or write_ex
16 * handler. This essentially replaces the hdr/ex_hdr system with the ioctl
17 * marshalling, and brings the non-ex path into the same marshalling as the ex
18 * path.
19 */
UVERBS_HANDLER(UVERBS_METHOD_INVOKE_WRITE)20 static int UVERBS_HANDLER(UVERBS_METHOD_INVOKE_WRITE)(
21 struct uverbs_attr_bundle *attrs)
22 {
23 struct uverbs_api *uapi = attrs->ufile->device->uapi;
24 const struct uverbs_api_write_method *method_elm;
25 u32 cmd;
26 int rc;
27
28 rc = uverbs_get_const(&cmd, attrs, UVERBS_ATTR_WRITE_CMD);
29 if (rc)
30 return rc;
31
32 method_elm = uapi_get_method(uapi, cmd);
33 if (IS_ERR(method_elm))
34 return PTR_ERR(method_elm);
35
36 uverbs_fill_udata(attrs, &attrs->ucore, UVERBS_ATTR_CORE_IN,
37 UVERBS_ATTR_CORE_OUT);
38
39 if (attrs->ucore.inlen < method_elm->req_size ||
40 attrs->ucore.outlen < method_elm->resp_size)
41 return -ENOSPC;
42
43 attrs->uobject = NULL;
44 rc = method_elm->handler(attrs);
45 if (attrs->uobject)
46 uverbs_finalize_object(attrs->uobject, UVERBS_ACCESS_NEW, true,
47 !rc, attrs);
48 return rc;
49 }
50
51 DECLARE_UVERBS_NAMED_METHOD(UVERBS_METHOD_INVOKE_WRITE,
52 UVERBS_ATTR_CONST_IN(UVERBS_ATTR_WRITE_CMD,
53 enum ib_uverbs_write_cmds,
54 UA_MANDATORY),
55 UVERBS_ATTR_PTR_IN(UVERBS_ATTR_CORE_IN,
56 UVERBS_ATTR_MIN_SIZE(sizeof(u32)),
57 UA_OPTIONAL),
58 UVERBS_ATTR_PTR_OUT(UVERBS_ATTR_CORE_OUT,
59 UVERBS_ATTR_MIN_SIZE(0),
60 UA_OPTIONAL),
61 UVERBS_ATTR_UHW());
62
63 static uint32_t *
gather_objects_handle(struct ib_uverbs_file * ufile,const struct uverbs_api_object * uapi_object,struct uverbs_attr_bundle * attrs,ssize_t out_len,u64 * total)64 gather_objects_handle(struct ib_uverbs_file *ufile,
65 const struct uverbs_api_object *uapi_object,
66 struct uverbs_attr_bundle *attrs,
67 ssize_t out_len,
68 u64 *total)
69 {
70 u64 max_count = out_len / sizeof(u32);
71 struct ib_uobject *obj;
72 u64 count = 0;
73 u32 *handles;
74
75 /* Allocated memory that cannot page out where we gather
76 * all object ids under a spin_lock.
77 */
78 handles = uverbs_zalloc(attrs, out_len);
79 if (IS_ERR(handles))
80 return handles;
81
82 spin_lock_irq(&ufile->uobjects_lock);
83 list_for_each_entry(obj, &ufile->uobjects, list) {
84 u32 obj_id = obj->id;
85
86 if (obj->uapi_object != uapi_object)
87 continue;
88
89 if (count >= max_count)
90 break;
91
92 handles[count] = obj_id;
93 count++;
94 }
95 spin_unlock_irq(&ufile->uobjects_lock);
96
97 *total = count;
98 return handles;
99 }
100
UVERBS_HANDLER(UVERBS_METHOD_INFO_HANDLES)101 static int UVERBS_HANDLER(UVERBS_METHOD_INFO_HANDLES)(
102 struct uverbs_attr_bundle *attrs)
103 {
104 const struct uverbs_api_object *uapi_object;
105 ssize_t out_len;
106 u64 total = 0;
107 u16 object_id;
108 u32 *handles;
109 int ret;
110
111 out_len = uverbs_attr_get_len(attrs, UVERBS_ATTR_INFO_HANDLES_LIST);
112 if (out_len <= 0 || (out_len % sizeof(u32) != 0))
113 return -EINVAL;
114
115 ret = uverbs_get_const(&object_id, attrs, UVERBS_ATTR_INFO_OBJECT_ID);
116 if (ret)
117 return ret;
118
119 uapi_object = uapi_get_object(attrs->ufile->device->uapi, object_id);
120 if (IS_ERR(uapi_object))
121 return PTR_ERR(uapi_object);
122
123 handles = gather_objects_handle(attrs->ufile, uapi_object, attrs,
124 out_len, &total);
125 if (IS_ERR(handles))
126 return PTR_ERR(handles);
127
128 ret = uverbs_copy_to(attrs, UVERBS_ATTR_INFO_HANDLES_LIST, handles,
129 sizeof(u32) * total);
130 if (ret)
131 goto err;
132
133 ret = uverbs_copy_to(attrs, UVERBS_ATTR_INFO_TOTAL_HANDLES, &total,
134 sizeof(total));
135 err:
136 return ret;
137 }
138
copy_port_attr_to_resp(struct ib_port_attr * attr,struct ib_uverbs_query_port_resp * resp,struct ib_device * ib_dev,u8 port_num)139 void copy_port_attr_to_resp(struct ib_port_attr *attr,
140 struct ib_uverbs_query_port_resp *resp,
141 struct ib_device *ib_dev, u8 port_num)
142 {
143 resp->state = attr->state;
144 resp->max_mtu = attr->max_mtu;
145 resp->active_mtu = attr->active_mtu;
146 resp->gid_tbl_len = attr->gid_tbl_len;
147 resp->port_cap_flags = make_port_cap_flags(attr);
148 resp->max_msg_sz = attr->max_msg_sz;
149 resp->bad_pkey_cntr = attr->bad_pkey_cntr;
150 resp->qkey_viol_cntr = attr->qkey_viol_cntr;
151 resp->pkey_tbl_len = attr->pkey_tbl_len;
152
153 if (rdma_is_grh_required(ib_dev, port_num))
154 resp->flags |= IB_UVERBS_QPF_GRH_REQUIRED;
155
156 if (rdma_cap_opa_ah(ib_dev, port_num)) {
157 resp->lid = OPA_TO_IB_UCAST_LID(attr->lid);
158 resp->sm_lid = OPA_TO_IB_UCAST_LID(attr->sm_lid);
159 } else {
160 resp->lid = ib_lid_cpu16(attr->lid);
161 resp->sm_lid = ib_lid_cpu16(attr->sm_lid);
162 }
163
164 resp->lmc = attr->lmc;
165 resp->max_vl_num = attr->max_vl_num;
166 resp->sm_sl = attr->sm_sl;
167 resp->subnet_timeout = attr->subnet_timeout;
168 resp->init_type_reply = attr->init_type_reply;
169 resp->active_width = attr->active_width;
170 /* This ABI needs to be extended to provide any speed more than IB_SPEED_NDR */
171 resp->active_speed = min_t(u16, attr->active_speed, IB_SPEED_NDR);
172 resp->phys_state = attr->phys_state;
173 resp->link_layer = rdma_port_get_link_layer(ib_dev, port_num);
174 }
175
UVERBS_HANDLER(UVERBS_METHOD_QUERY_PORT)176 static int UVERBS_HANDLER(UVERBS_METHOD_QUERY_PORT)(
177 struct uverbs_attr_bundle *attrs)
178 {
179 struct ib_device *ib_dev;
180 struct ib_port_attr attr = {};
181 struct ib_uverbs_query_port_resp_ex resp = {};
182 struct ib_ucontext *ucontext;
183 int ret;
184 u8 port_num;
185
186 ucontext = ib_uverbs_get_ucontext(attrs);
187 if (IS_ERR(ucontext))
188 return PTR_ERR(ucontext);
189 ib_dev = ucontext->device;
190
191 /* FIXME: Extend the UAPI_DEF_OBJ_NEEDS_FN stuff.. */
192 if (!ib_dev->ops.query_port)
193 return -EOPNOTSUPP;
194
195 ret = uverbs_get_const(&port_num, attrs,
196 UVERBS_ATTR_QUERY_PORT_PORT_NUM);
197 if (ret)
198 return ret;
199
200 ret = ib_query_port(ib_dev, port_num, &attr);
201 if (ret)
202 return ret;
203
204 copy_port_attr_to_resp(&attr, &resp.legacy_resp, ib_dev, port_num);
205 resp.port_cap_flags2 = attr.port_cap_flags2;
206
207 return uverbs_copy_to_struct_or_zero(attrs, UVERBS_ATTR_QUERY_PORT_RESP,
208 &resp, sizeof(resp));
209 }
210
UVERBS_HANDLER(UVERBS_METHOD_GET_CONTEXT)211 static int UVERBS_HANDLER(UVERBS_METHOD_GET_CONTEXT)(
212 struct uverbs_attr_bundle *attrs)
213 {
214 u32 num_comp = attrs->ufile->device->num_comp_vectors;
215 u64 core_support = IB_UVERBS_CORE_SUPPORT_OPTIONAL_MR_ACCESS;
216 int ret;
217
218 ret = uverbs_copy_to(attrs, UVERBS_ATTR_GET_CONTEXT_NUM_COMP_VECTORS,
219 &num_comp, sizeof(num_comp));
220 if (IS_UVERBS_COPY_ERR(ret))
221 return ret;
222
223 ret = uverbs_copy_to(attrs, UVERBS_ATTR_GET_CONTEXT_CORE_SUPPORT,
224 &core_support, sizeof(core_support));
225 if (IS_UVERBS_COPY_ERR(ret))
226 return ret;
227
228 ret = ib_alloc_ucontext(attrs);
229 if (ret)
230 return ret;
231 ret = ib_init_ucontext(attrs);
232 if (ret) {
233 kfree(attrs->context);
234 attrs->context = NULL;
235 return ret;
236 }
237 return 0;
238 }
239
UVERBS_HANDLER(UVERBS_METHOD_QUERY_CONTEXT)240 static int UVERBS_HANDLER(UVERBS_METHOD_QUERY_CONTEXT)(
241 struct uverbs_attr_bundle *attrs)
242 {
243 u64 core_support = IB_UVERBS_CORE_SUPPORT_OPTIONAL_MR_ACCESS;
244 struct ib_ucontext *ucontext;
245 struct ib_device *ib_dev;
246 u32 num_comp;
247 int ret;
248
249 ucontext = ib_uverbs_get_ucontext(attrs);
250 if (IS_ERR(ucontext))
251 return PTR_ERR(ucontext);
252 ib_dev = ucontext->device;
253
254 if (!ib_dev->ops.query_ucontext)
255 return -EOPNOTSUPP;
256
257 num_comp = attrs->ufile->device->num_comp_vectors;
258 ret = uverbs_copy_to(attrs, UVERBS_ATTR_QUERY_CONTEXT_NUM_COMP_VECTORS,
259 &num_comp, sizeof(num_comp));
260 if (IS_UVERBS_COPY_ERR(ret))
261 return ret;
262
263 ret = uverbs_copy_to(attrs, UVERBS_ATTR_QUERY_CONTEXT_CORE_SUPPORT,
264 &core_support, sizeof(core_support));
265 if (IS_UVERBS_COPY_ERR(ret))
266 return ret;
267
268 return ucontext->device->ops.query_ucontext(ucontext, attrs);
269 }
270
copy_gid_entries_to_user(struct uverbs_attr_bundle * attrs,struct ib_uverbs_gid_entry * entries,size_t num_entries,size_t user_entry_size)271 static int copy_gid_entries_to_user(struct uverbs_attr_bundle *attrs,
272 struct ib_uverbs_gid_entry *entries,
273 size_t num_entries, size_t user_entry_size)
274 {
275 const struct uverbs_attr *attr;
276 void __user *user_entries;
277 size_t copy_len;
278 int ret;
279 int i;
280
281 if (user_entry_size == sizeof(*entries)) {
282 ret = uverbs_copy_to(attrs,
283 UVERBS_ATTR_QUERY_GID_TABLE_RESP_ENTRIES,
284 entries, sizeof(*entries) * num_entries);
285 return ret;
286 }
287
288 copy_len = min_t(size_t, user_entry_size, sizeof(*entries));
289 attr = uverbs_attr_get(attrs, UVERBS_ATTR_QUERY_GID_TABLE_RESP_ENTRIES);
290 if (IS_ERR(attr))
291 return PTR_ERR(attr);
292
293 user_entries = u64_to_user_ptr(attr->ptr_attr.data);
294 for (i = 0; i < num_entries; i++) {
295 if (copy_to_user(user_entries, entries, copy_len))
296 return -EFAULT;
297
298 if (user_entry_size > sizeof(*entries)) {
299 if (clear_user(user_entries + sizeof(*entries),
300 user_entry_size - sizeof(*entries)))
301 return -EFAULT;
302 }
303
304 entries++;
305 user_entries += user_entry_size;
306 }
307
308 return uverbs_output_written(attrs,
309 UVERBS_ATTR_QUERY_GID_TABLE_RESP_ENTRIES);
310 }
311
UVERBS_HANDLER(UVERBS_METHOD_QUERY_GID_TABLE)312 static int UVERBS_HANDLER(UVERBS_METHOD_QUERY_GID_TABLE)(
313 struct uverbs_attr_bundle *attrs)
314 {
315 struct ib_uverbs_gid_entry *entries;
316 struct ib_ucontext *ucontext;
317 struct ib_device *ib_dev;
318 size_t user_entry_size;
319 ssize_t num_entries;
320 int max_entries;
321 u32 flags;
322 int ret;
323
324 ret = uverbs_get_flags32(&flags, attrs,
325 UVERBS_ATTR_QUERY_GID_TABLE_FLAGS, 0);
326 if (ret)
327 return ret;
328
329 ret = uverbs_get_const(&user_entry_size, attrs,
330 UVERBS_ATTR_QUERY_GID_TABLE_ENTRY_SIZE);
331 if (ret)
332 return ret;
333
334 if (!user_entry_size)
335 return -EINVAL;
336
337 max_entries = uverbs_attr_ptr_get_array_size(
338 attrs, UVERBS_ATTR_QUERY_GID_TABLE_RESP_ENTRIES,
339 user_entry_size);
340 if (max_entries <= 0)
341 return max_entries ?: -EINVAL;
342
343 ucontext = ib_uverbs_get_ucontext(attrs);
344 if (IS_ERR(ucontext))
345 return PTR_ERR(ucontext);
346 ib_dev = ucontext->device;
347
348 entries = uverbs_kcalloc(attrs, max_entries, sizeof(*entries));
349 if (IS_ERR(entries))
350 return PTR_ERR(entries);
351
352 num_entries = rdma_query_gid_table(ib_dev, entries, max_entries);
353 if (num_entries < 0)
354 return -EINVAL;
355
356 ret = copy_gid_entries_to_user(attrs, entries, num_entries,
357 user_entry_size);
358 if (ret)
359 return ret;
360
361 ret = uverbs_copy_to(attrs,
362 UVERBS_ATTR_QUERY_GID_TABLE_RESP_NUM_ENTRIES,
363 &num_entries, sizeof(num_entries));
364 return ret;
365 }
366
UVERBS_HANDLER(UVERBS_METHOD_QUERY_GID_ENTRY)367 static int UVERBS_HANDLER(UVERBS_METHOD_QUERY_GID_ENTRY)(
368 struct uverbs_attr_bundle *attrs)
369 {
370 struct ib_uverbs_gid_entry entry = {};
371 const struct ib_gid_attr *gid_attr;
372 struct ib_ucontext *ucontext;
373 struct ib_device *ib_dev;
374 struct net_device *ndev;
375 u32 gid_index;
376 u32 port_num;
377 u32 flags;
378 int ret;
379
380 ret = uverbs_get_flags32(&flags, attrs,
381 UVERBS_ATTR_QUERY_GID_ENTRY_FLAGS, 0);
382 if (ret)
383 return ret;
384
385 ret = uverbs_get_const(&port_num, attrs,
386 UVERBS_ATTR_QUERY_GID_ENTRY_PORT);
387 if (ret)
388 return ret;
389
390 ret = uverbs_get_const(&gid_index, attrs,
391 UVERBS_ATTR_QUERY_GID_ENTRY_GID_INDEX);
392 if (ret)
393 return ret;
394
395 ucontext = ib_uverbs_get_ucontext(attrs);
396 if (IS_ERR(ucontext))
397 return PTR_ERR(ucontext);
398 ib_dev = ucontext->device;
399
400 if (!rdma_is_port_valid(ib_dev, port_num))
401 return -EINVAL;
402
403 gid_attr = rdma_get_gid_attr(ib_dev, port_num, gid_index);
404 if (IS_ERR(gid_attr))
405 return PTR_ERR(gid_attr);
406
407 memcpy(&entry.gid, &gid_attr->gid, sizeof(gid_attr->gid));
408 entry.gid_index = gid_attr->index;
409 entry.port_num = gid_attr->port_num;
410 entry.gid_type = gid_attr->gid_type;
411
412 rcu_read_lock();
413 ndev = rdma_read_gid_attr_ndev_rcu(gid_attr);
414 if (IS_ERR(ndev)) {
415 if (PTR_ERR(ndev) != -ENODEV) {
416 ret = PTR_ERR(ndev);
417 rcu_read_unlock();
418 goto out;
419 }
420 } else {
421 entry.netdev_ifindex = ndev->ifindex;
422 }
423 rcu_read_unlock();
424
425 ret = uverbs_copy_to_struct_or_zero(
426 attrs, UVERBS_ATTR_QUERY_GID_ENTRY_RESP_ENTRY, &entry,
427 sizeof(entry));
428 out:
429 rdma_put_gid_attr(gid_attr);
430 return ret;
431 }
432
433 DECLARE_UVERBS_NAMED_METHOD(
434 UVERBS_METHOD_GET_CONTEXT,
435 UVERBS_ATTR_PTR_OUT(UVERBS_ATTR_GET_CONTEXT_NUM_COMP_VECTORS,
436 UVERBS_ATTR_TYPE(u32), UA_OPTIONAL),
437 UVERBS_ATTR_PTR_OUT(UVERBS_ATTR_GET_CONTEXT_CORE_SUPPORT,
438 UVERBS_ATTR_TYPE(u64), UA_OPTIONAL),
439 UVERBS_ATTR_UHW());
440
441 DECLARE_UVERBS_NAMED_METHOD(
442 UVERBS_METHOD_QUERY_CONTEXT,
443 UVERBS_ATTR_PTR_OUT(UVERBS_ATTR_QUERY_CONTEXT_NUM_COMP_VECTORS,
444 UVERBS_ATTR_TYPE(u32), UA_OPTIONAL),
445 UVERBS_ATTR_PTR_OUT(UVERBS_ATTR_QUERY_CONTEXT_CORE_SUPPORT,
446 UVERBS_ATTR_TYPE(u64), UA_OPTIONAL));
447
448 DECLARE_UVERBS_NAMED_METHOD(
449 UVERBS_METHOD_INFO_HANDLES,
450 /* Also includes any device specific object ids */
451 UVERBS_ATTR_CONST_IN(UVERBS_ATTR_INFO_OBJECT_ID,
452 enum uverbs_default_objects, UA_MANDATORY),
453 UVERBS_ATTR_PTR_OUT(UVERBS_ATTR_INFO_TOTAL_HANDLES,
454 UVERBS_ATTR_TYPE(u32), UA_OPTIONAL),
455 UVERBS_ATTR_PTR_OUT(UVERBS_ATTR_INFO_HANDLES_LIST,
456 UVERBS_ATTR_MIN_SIZE(sizeof(u32)), UA_OPTIONAL));
457
458 DECLARE_UVERBS_NAMED_METHOD(
459 UVERBS_METHOD_QUERY_PORT,
460 UVERBS_ATTR_CONST_IN(UVERBS_ATTR_QUERY_PORT_PORT_NUM, u8, UA_MANDATORY),
461 UVERBS_ATTR_PTR_OUT(
462 UVERBS_ATTR_QUERY_PORT_RESP,
463 UVERBS_ATTR_STRUCT(struct ib_uverbs_query_port_resp_ex,
464 reserved),
465 UA_MANDATORY));
466
467 DECLARE_UVERBS_NAMED_METHOD(
468 UVERBS_METHOD_QUERY_GID_TABLE,
469 UVERBS_ATTR_CONST_IN(UVERBS_ATTR_QUERY_GID_TABLE_ENTRY_SIZE, u64,
470 UA_MANDATORY),
471 UVERBS_ATTR_FLAGS_IN(UVERBS_ATTR_QUERY_GID_TABLE_FLAGS, u32,
472 UA_OPTIONAL),
473 UVERBS_ATTR_PTR_OUT(UVERBS_ATTR_QUERY_GID_TABLE_RESP_ENTRIES,
474 UVERBS_ATTR_MIN_SIZE(0), UA_MANDATORY),
475 UVERBS_ATTR_PTR_OUT(UVERBS_ATTR_QUERY_GID_TABLE_RESP_NUM_ENTRIES,
476 UVERBS_ATTR_TYPE(u64), UA_MANDATORY));
477
478 DECLARE_UVERBS_NAMED_METHOD(
479 UVERBS_METHOD_QUERY_GID_ENTRY,
480 UVERBS_ATTR_CONST_IN(UVERBS_ATTR_QUERY_GID_ENTRY_PORT, u32,
481 UA_MANDATORY),
482 UVERBS_ATTR_CONST_IN(UVERBS_ATTR_QUERY_GID_ENTRY_GID_INDEX, u32,
483 UA_MANDATORY),
484 UVERBS_ATTR_FLAGS_IN(UVERBS_ATTR_QUERY_GID_ENTRY_FLAGS, u32,
485 UA_MANDATORY),
486 UVERBS_ATTR_PTR_OUT(UVERBS_ATTR_QUERY_GID_ENTRY_RESP_ENTRY,
487 UVERBS_ATTR_STRUCT(struct ib_uverbs_gid_entry,
488 netdev_ifindex),
489 UA_MANDATORY));
490
491 DECLARE_UVERBS_GLOBAL_METHODS(UVERBS_OBJECT_DEVICE,
492 &UVERBS_METHOD(UVERBS_METHOD_GET_CONTEXT),
493 &UVERBS_METHOD(UVERBS_METHOD_INVOKE_WRITE),
494 &UVERBS_METHOD(UVERBS_METHOD_INFO_HANDLES),
495 &UVERBS_METHOD(UVERBS_METHOD_QUERY_PORT),
496 &UVERBS_METHOD(UVERBS_METHOD_QUERY_CONTEXT),
497 &UVERBS_METHOD(UVERBS_METHOD_QUERY_GID_TABLE),
498 &UVERBS_METHOD(UVERBS_METHOD_QUERY_GID_ENTRY));
499
500 const struct uapi_definition uverbs_def_obj_device[] = {
501 UAPI_DEF_CHAIN_OBJ_TREE_NAMED(UVERBS_OBJECT_DEVICE),
502 {},
503 };
504