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Commit | Line | Data |
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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
6812baab TR |
2 | /* |
3 | * Shared Memory Communications over RDMA (SMC-R) and RoCE | |
4 | * | |
5 | * Generic netlink support functions to configure an SMC-R PNET table | |
6 | * | |
7 | * Copyright IBM Corp. 2016 | |
8 | * | |
9 | * Author(s): Thomas Richter <tmricht@linux.vnet.ibm.com> | |
10 | */ | |
11 | ||
12 | #include <linux/module.h> | |
13 | #include <linux/list.h> | |
14 | #include <linux/ctype.h> | |
15 | #include <net/netlink.h> | |
16 | #include <net/genetlink.h> | |
17 | ||
18 | #include <uapi/linux/if.h> | |
19 | #include <uapi/linux/smc.h> | |
20 | ||
21 | #include <rdma/ib_verbs.h> | |
22 | ||
64e28b52 HW |
23 | #include <net/netns/generic.h> |
24 | #include "smc_netns.h" | |
25 | ||
6812baab TR |
26 | #include "smc_pnet.h" |
27 | #include "smc_ib.h" | |
1619f770 | 28 | #include "smc_ism.h" |
6812baab | 29 | |
890a2cb4 HW |
30 | #define SMC_ASCII_BLANK 32 |
31 | ||
32 | static struct net_device *pnet_find_base_ndev(struct net_device *ndev); | |
33 | ||
6812baab TR |
34 | static struct nla_policy smc_pnet_policy[SMC_PNETID_MAX + 1] = { |
35 | [SMC_PNETID_NAME] = { | |
36 | .type = NLA_NUL_STRING, | |
ca8dc133 | 37 | .len = SMC_MAX_PNETID_LEN |
6812baab TR |
38 | }, |
39 | [SMC_PNETID_ETHNAME] = { | |
40 | .type = NLA_NUL_STRING, | |
41 | .len = IFNAMSIZ - 1 | |
42 | }, | |
43 | [SMC_PNETID_IBNAME] = { | |
44 | .type = NLA_NUL_STRING, | |
45 | .len = IB_DEVICE_NAME_MAX - 1 | |
46 | }, | |
47 | [SMC_PNETID_IBPORT] = { .type = NLA_U8 } | |
48 | }; | |
49 | ||
50 | static struct genl_family smc_pnet_nl_family; | |
51 | ||
6812baab | 52 | /** |
890a2cb4 | 53 | * struct smc_user_pnetentry - pnet identifier name entry for/from user |
6812baab TR |
54 | * @list: List node. |
55 | * @pnet_name: Pnet identifier name | |
56 | * @ndev: pointer to network device. | |
57 | * @smcibdev: Pointer to IB device. | |
890a2cb4 | 58 | * @ib_port: Port of IB device. |
f3d74b22 | 59 | * @smcd_dev: Pointer to smcd device. |
6812baab | 60 | */ |
890a2cb4 | 61 | struct smc_user_pnetentry { |
6812baab | 62 | struct list_head list; |
0afff91c | 63 | char pnet_name[SMC_MAX_PNETID_LEN + 1]; |
6812baab TR |
64 | struct net_device *ndev; |
65 | struct smc_ib_device *smcibdev; | |
66 | u8 ib_port; | |
f3d74b22 | 67 | struct smcd_dev *smcd_dev; |
6812baab TR |
68 | }; |
69 | ||
890a2cb4 HW |
70 | /* pnet entry stored in pnet table */ |
71 | struct smc_pnetentry { | |
72 | struct list_head list; | |
73 | char pnet_name[SMC_MAX_PNETID_LEN + 1]; | |
74 | struct net_device *ndev; | |
75 | }; | |
6812baab | 76 | |
890a2cb4 HW |
77 | /* Check if two given pnetids match */ |
78 | static bool smc_pnet_match(u8 *pnetid1, u8 *pnetid2) | |
6812baab | 79 | { |
890a2cb4 | 80 | int i; |
6812baab | 81 | |
890a2cb4 HW |
82 | for (i = 0; i < SMC_MAX_PNETID_LEN; i++) { |
83 | if ((pnetid1[i] == 0 || pnetid1[i] == SMC_ASCII_BLANK) && | |
84 | (pnetid2[i] == 0 || pnetid2[i] == SMC_ASCII_BLANK)) | |
6812baab | 85 | break; |
890a2cb4 HW |
86 | if (pnetid1[i] != pnetid2[i]) |
87 | return false; | |
6812baab | 88 | } |
890a2cb4 | 89 | return true; |
6812baab TR |
90 | } |
91 | ||
92 | /* Remove a pnetid from the pnet table. | |
93 | */ | |
64e28b52 | 94 | static int smc_pnet_remove_by_pnetid(struct net *net, char *pnet_name) |
6812baab TR |
95 | { |
96 | struct smc_pnetentry *pnetelem, *tmp_pe; | |
64e28b52 | 97 | struct smc_pnettable *pnettable; |
890a2cb4 | 98 | struct smc_ib_device *ibdev; |
f3d74b22 | 99 | struct smcd_dev *smcd_dev; |
64e28b52 | 100 | struct smc_net *sn; |
6812baab | 101 | int rc = -ENOENT; |
890a2cb4 | 102 | int ibport; |
6812baab | 103 | |
64e28b52 HW |
104 | /* get pnettable for namespace */ |
105 | sn = net_generic(net, smc_net_id); | |
106 | pnettable = &sn->pnettable; | |
107 | ||
890a2cb4 | 108 | /* remove netdevices */ |
64e28b52 HW |
109 | write_lock(&pnettable->lock); |
110 | list_for_each_entry_safe(pnetelem, tmp_pe, &pnettable->pnetlist, | |
6812baab | 111 | list) { |
890a2cb4 HW |
112 | if (!pnet_name || |
113 | smc_pnet_match(pnetelem->pnet_name, pnet_name)) { | |
6812baab TR |
114 | list_del(&pnetelem->list); |
115 | dev_put(pnetelem->ndev); | |
116 | kfree(pnetelem); | |
117 | rc = 0; | |
6812baab TR |
118 | } |
119 | } | |
64e28b52 HW |
120 | write_unlock(&pnettable->lock); |
121 | ||
122 | /* if this is not the initial namespace, stop here */ | |
123 | if (net != &init_net) | |
124 | return rc; | |
125 | ||
890a2cb4 HW |
126 | /* remove ib devices */ |
127 | spin_lock(&smc_ib_devices.lock); | |
128 | list_for_each_entry(ibdev, &smc_ib_devices.list, list) { | |
129 | for (ibport = 0; ibport < SMC_MAX_PORTS; ibport++) { | |
130 | if (ibdev->pnetid_by_user[ibport] && | |
131 | (!pnet_name || | |
132 | smc_pnet_match(pnet_name, | |
133 | ibdev->pnetid[ibport]))) { | |
134 | memset(ibdev->pnetid[ibport], 0, | |
135 | SMC_MAX_PNETID_LEN); | |
136 | ibdev->pnetid_by_user[ibport] = false; | |
137 | rc = 0; | |
138 | } | |
139 | } | |
140 | } | |
141 | spin_unlock(&smc_ib_devices.lock); | |
f3d74b22 HW |
142 | /* remove smcd devices */ |
143 | spin_lock(&smcd_dev_list.lock); | |
144 | list_for_each_entry(smcd_dev, &smcd_dev_list.list, list) { | |
145 | if (smcd_dev->pnetid_by_user && | |
146 | (!pnet_name || | |
147 | smc_pnet_match(pnet_name, smcd_dev->pnetid))) { | |
148 | memset(smcd_dev->pnetid, 0, SMC_MAX_PNETID_LEN); | |
149 | smcd_dev->pnetid_by_user = false; | |
150 | rc = 0; | |
151 | } | |
152 | } | |
153 | spin_unlock(&smcd_dev_list.lock); | |
6812baab TR |
154 | return rc; |
155 | } | |
156 | ||
157 | /* Remove a pnet entry mentioning a given network device from the pnet table. | |
158 | */ | |
159 | static int smc_pnet_remove_by_ndev(struct net_device *ndev) | |
160 | { | |
161 | struct smc_pnetentry *pnetelem, *tmp_pe; | |
64e28b52 HW |
162 | struct smc_pnettable *pnettable; |
163 | struct net *net = dev_net(ndev); | |
164 | struct smc_net *sn; | |
6812baab TR |
165 | int rc = -ENOENT; |
166 | ||
64e28b52 HW |
167 | /* get pnettable for namespace */ |
168 | sn = net_generic(net, smc_net_id); | |
169 | pnettable = &sn->pnettable; | |
170 | ||
171 | write_lock(&pnettable->lock); | |
172 | list_for_each_entry_safe(pnetelem, tmp_pe, &pnettable->pnetlist, list) { | |
6812baab TR |
173 | if (pnetelem->ndev == ndev) { |
174 | list_del(&pnetelem->list); | |
175 | dev_put(pnetelem->ndev); | |
176 | kfree(pnetelem); | |
177 | rc = 0; | |
178 | break; | |
179 | } | |
180 | } | |
64e28b52 | 181 | write_unlock(&pnettable->lock); |
6812baab TR |
182 | return rc; |
183 | } | |
184 | ||
890a2cb4 | 185 | /* Append a pnetid to the end of the pnet table if not already on this list. |
6812baab | 186 | */ |
64e28b52 HW |
187 | static int smc_pnet_enter(struct smc_pnettable *pnettable, |
188 | struct smc_user_pnetentry *new_pnetelem) | |
6812baab | 189 | { |
890a2cb4 HW |
190 | u8 pnet_null[SMC_MAX_PNETID_LEN] = {0}; |
191 | u8 ndev_pnetid[SMC_MAX_PNETID_LEN]; | |
192 | struct smc_pnetentry *tmp_pnetelem; | |
193 | struct smc_pnetentry *pnetelem; | |
f3d74b22 | 194 | bool new_smcddev = false; |
890a2cb4 HW |
195 | struct net_device *ndev; |
196 | bool new_netdev = true; | |
197 | bool new_ibdev = false; | |
198 | ||
199 | if (new_pnetelem->smcibdev) { | |
200 | struct smc_ib_device *ib_dev = new_pnetelem->smcibdev; | |
201 | int ib_port = new_pnetelem->ib_port; | |
202 | ||
203 | spin_lock(&smc_ib_devices.lock); | |
204 | if (smc_pnet_match(ib_dev->pnetid[ib_port - 1], pnet_null)) { | |
205 | memcpy(ib_dev->pnetid[ib_port - 1], | |
206 | new_pnetelem->pnet_name, SMC_MAX_PNETID_LEN); | |
207 | ib_dev->pnetid_by_user[ib_port - 1] = true; | |
208 | new_ibdev = true; | |
6812baab | 209 | } |
890a2cb4 | 210 | spin_unlock(&smc_ib_devices.lock); |
6812baab | 211 | } |
f3d74b22 HW |
212 | if (new_pnetelem->smcd_dev) { |
213 | struct smcd_dev *smcd_dev = new_pnetelem->smcd_dev; | |
214 | ||
215 | spin_lock(&smcd_dev_list.lock); | |
216 | if (smc_pnet_match(smcd_dev->pnetid, pnet_null)) { | |
217 | memcpy(smcd_dev->pnetid, new_pnetelem->pnet_name, | |
218 | SMC_MAX_PNETID_LEN); | |
219 | smcd_dev->pnetid_by_user = true; | |
220 | new_smcddev = true; | |
221 | } | |
222 | spin_unlock(&smcd_dev_list.lock); | |
223 | } | |
6812baab | 224 | |
890a2cb4 | 225 | if (!new_pnetelem->ndev) |
f3d74b22 | 226 | return (new_ibdev || new_smcddev) ? 0 : -EEXIST; |
890a2cb4 HW |
227 | |
228 | /* check if (base) netdev already has a pnetid. If there is one, we do | |
229 | * not want to add a pnet table entry | |
230 | */ | |
231 | ndev = pnet_find_base_ndev(new_pnetelem->ndev); | |
232 | if (!smc_pnetid_by_dev_port(ndev->dev.parent, ndev->dev_port, | |
233 | ndev_pnetid)) | |
f3d74b22 | 234 | return (new_ibdev || new_smcddev) ? 0 : -EEXIST; |
890a2cb4 HW |
235 | |
236 | /* add a new netdev entry to the pnet table if there isn't one */ | |
237 | tmp_pnetelem = kzalloc(sizeof(*pnetelem), GFP_KERNEL); | |
238 | if (!tmp_pnetelem) | |
239 | return -ENOMEM; | |
240 | memcpy(tmp_pnetelem->pnet_name, new_pnetelem->pnet_name, | |
241 | SMC_MAX_PNETID_LEN); | |
242 | tmp_pnetelem->ndev = new_pnetelem->ndev; | |
6812baab | 243 | |
64e28b52 HW |
244 | write_lock(&pnettable->lock); |
245 | list_for_each_entry(pnetelem, &pnettable->pnetlist, list) { | |
890a2cb4 HW |
246 | if (pnetelem->ndev == new_pnetelem->ndev) |
247 | new_netdev = false; | |
6812baab | 248 | } |
890a2cb4 HW |
249 | if (new_netdev) { |
250 | dev_hold(tmp_pnetelem->ndev); | |
64e28b52 HW |
251 | list_add_tail(&tmp_pnetelem->list, &pnettable->pnetlist); |
252 | write_unlock(&pnettable->lock); | |
890a2cb4 | 253 | } else { |
64e28b52 | 254 | write_unlock(&pnettable->lock); |
890a2cb4 HW |
255 | kfree(tmp_pnetelem); |
256 | } | |
257 | ||
f3d74b22 | 258 | return (new_netdev || new_ibdev || new_smcddev) ? 0 : -EEXIST; |
6812baab TR |
259 | } |
260 | ||
261 | /* The limit for pnetid is 16 characters. | |
262 | * Valid characters should be (single-byte character set) a-z, A-Z, 0-9. | |
263 | * Lower case letters are converted to upper case. | |
264 | * Interior blanks should not be used. | |
265 | */ | |
266 | static bool smc_pnetid_valid(const char *pnet_name, char *pnetid) | |
267 | { | |
268 | char *bf = skip_spaces(pnet_name); | |
269 | size_t len = strlen(bf); | |
270 | char *end = bf + len; | |
271 | ||
272 | if (!len) | |
273 | return false; | |
274 | while (--end >= bf && isspace(*end)) | |
275 | ; | |
0afff91c | 276 | if (end - bf >= SMC_MAX_PNETID_LEN) |
6812baab TR |
277 | return false; |
278 | while (bf <= end) { | |
279 | if (!isalnum(*bf)) | |
280 | return false; | |
281 | *pnetid++ = islower(*bf) ? toupper(*bf) : *bf; | |
282 | bf++; | |
283 | } | |
284 | *pnetid = '\0'; | |
285 | return true; | |
286 | } | |
287 | ||
288 | /* Find an infiniband device by a given name. The device might not exist. */ | |
249633a4 | 289 | static struct smc_ib_device *smc_pnet_find_ib(char *ib_name) |
6812baab TR |
290 | { |
291 | struct smc_ib_device *ibdev; | |
292 | ||
293 | spin_lock(&smc_ib_devices.lock); | |
294 | list_for_each_entry(ibdev, &smc_ib_devices.list, list) { | |
295 | if (!strncmp(ibdev->ibdev->name, ib_name, | |
af5f60c7 HW |
296 | sizeof(ibdev->ibdev->name)) || |
297 | !strncmp(dev_name(ibdev->ibdev->dev.parent), ib_name, | |
298 | IB_DEVICE_NAME_MAX - 1)) { | |
6812baab TR |
299 | goto out; |
300 | } | |
301 | } | |
302 | ibdev = NULL; | |
303 | out: | |
304 | spin_unlock(&smc_ib_devices.lock); | |
305 | return ibdev; | |
306 | } | |
307 | ||
f3d74b22 HW |
308 | /* Find an smcd device by a given name. The device might not exist. */ |
309 | static struct smcd_dev *smc_pnet_find_smcd(char *smcd_name) | |
310 | { | |
311 | struct smcd_dev *smcd_dev; | |
312 | ||
313 | spin_lock(&smcd_dev_list.lock); | |
314 | list_for_each_entry(smcd_dev, &smcd_dev_list.list, list) { | |
315 | if (!strncmp(dev_name(&smcd_dev->dev), smcd_name, | |
316 | IB_DEVICE_NAME_MAX - 1)) | |
317 | goto out; | |
318 | } | |
319 | smcd_dev = NULL; | |
320 | out: | |
321 | spin_unlock(&smcd_dev_list.lock); | |
322 | return smcd_dev; | |
323 | } | |
324 | ||
6812baab TR |
325 | /* Parse the supplied netlink attributes and fill a pnetentry structure. |
326 | * For ethernet and infiniband device names verify that the devices exist. | |
327 | */ | |
890a2cb4 HW |
328 | static int smc_pnet_fill_entry(struct net *net, |
329 | struct smc_user_pnetentry *pnetelem, | |
6812baab TR |
330 | struct nlattr *tb[]) |
331 | { | |
d49baa7e EB |
332 | char *string, *ibname; |
333 | int rc; | |
6812baab TR |
334 | |
335 | memset(pnetelem, 0, sizeof(*pnetelem)); | |
336 | INIT_LIST_HEAD(&pnetelem->list); | |
d49baa7e EB |
337 | |
338 | rc = -EINVAL; | |
339 | if (!tb[SMC_PNETID_NAME]) | |
340 | goto error; | |
341 | string = (char *)nla_data(tb[SMC_PNETID_NAME]); | |
342 | if (!smc_pnetid_valid(string, pnetelem->pnet_name)) | |
343 | goto error; | |
344 | ||
345 | rc = -EINVAL; | |
890a2cb4 HW |
346 | if (tb[SMC_PNETID_ETHNAME]) { |
347 | string = (char *)nla_data(tb[SMC_PNETID_ETHNAME]); | |
348 | pnetelem->ndev = dev_get_by_name(net, string); | |
349 | if (!pnetelem->ndev) | |
350 | goto error; | |
351 | } | |
d49baa7e | 352 | |
64e28b52 HW |
353 | /* if this is not the initial namespace, stop here */ |
354 | if (net != &init_net) | |
355 | return 0; | |
356 | ||
d49baa7e | 357 | rc = -EINVAL; |
890a2cb4 HW |
358 | if (tb[SMC_PNETID_IBNAME]) { |
359 | ibname = (char *)nla_data(tb[SMC_PNETID_IBNAME]); | |
360 | ibname = strim(ibname); | |
361 | pnetelem->smcibdev = smc_pnet_find_ib(ibname); | |
f3d74b22 HW |
362 | pnetelem->smcd_dev = smc_pnet_find_smcd(ibname); |
363 | if (!pnetelem->smcibdev && !pnetelem->smcd_dev) | |
890a2cb4 HW |
364 | goto error; |
365 | if (pnetelem->smcibdev) { | |
366 | if (!tb[SMC_PNETID_IBPORT]) | |
367 | goto error; | |
368 | pnetelem->ib_port = nla_get_u8(tb[SMC_PNETID_IBPORT]); | |
369 | if (pnetelem->ib_port < 1 || | |
370 | pnetelem->ib_port > SMC_MAX_PORTS) | |
371 | goto error; | |
372 | } | |
373 | } | |
d49baa7e | 374 | |
6812baab TR |
375 | return 0; |
376 | ||
377 | error: | |
378 | if (pnetelem->ndev) | |
379 | dev_put(pnetelem->ndev); | |
380 | return rc; | |
381 | } | |
382 | ||
383 | /* Convert an smc_pnetentry to a netlink attribute sequence */ | |
890a2cb4 HW |
384 | static int smc_pnet_set_nla(struct sk_buff *msg, |
385 | struct smc_user_pnetentry *pnetelem) | |
6812baab | 386 | { |
890a2cb4 | 387 | if (nla_put_string(msg, SMC_PNETID_NAME, pnetelem->pnet_name)) |
6812baab | 388 | return -1; |
890a2cb4 HW |
389 | if (pnetelem->ndev) { |
390 | if (nla_put_string(msg, SMC_PNETID_ETHNAME, | |
391 | pnetelem->ndev->name)) | |
392 | return -1; | |
393 | } else { | |
394 | if (nla_put_string(msg, SMC_PNETID_ETHNAME, "n/a")) | |
395 | return -1; | |
6812baab | 396 | } |
890a2cb4 HW |
397 | if (pnetelem->smcibdev) { |
398 | if (nla_put_string(msg, SMC_PNETID_IBNAME, | |
af5f60c7 | 399 | dev_name(pnetelem->smcibdev->ibdev->dev.parent)) || |
890a2cb4 HW |
400 | nla_put_u8(msg, SMC_PNETID_IBPORT, pnetelem->ib_port)) |
401 | return -1; | |
f3d74b22 HW |
402 | } else if (pnetelem->smcd_dev) { |
403 | if (nla_put_string(msg, SMC_PNETID_IBNAME, | |
404 | dev_name(&pnetelem->smcd_dev->dev)) || | |
405 | nla_put_u8(msg, SMC_PNETID_IBPORT, 1)) | |
406 | return -1; | |
890a2cb4 HW |
407 | } else { |
408 | if (nla_put_string(msg, SMC_PNETID_IBNAME, "n/a") || | |
409 | nla_put_u8(msg, SMC_PNETID_IBPORT, 0xff)) | |
410 | return -1; | |
6812baab TR |
411 | } |
412 | ||
890a2cb4 | 413 | return 0; |
6812baab TR |
414 | } |
415 | ||
416 | static int smc_pnet_add(struct sk_buff *skb, struct genl_info *info) | |
417 | { | |
418 | struct net *net = genl_info_net(info); | |
890a2cb4 | 419 | struct smc_user_pnetentry pnetelem; |
64e28b52 HW |
420 | struct smc_pnettable *pnettable; |
421 | struct smc_net *sn; | |
6812baab TR |
422 | int rc; |
423 | ||
64e28b52 HW |
424 | /* get pnettable for namespace */ |
425 | sn = net_generic(net, smc_net_id); | |
426 | pnettable = &sn->pnettable; | |
427 | ||
890a2cb4 | 428 | rc = smc_pnet_fill_entry(net, &pnetelem, info->attrs); |
6812baab | 429 | if (!rc) |
64e28b52 | 430 | rc = smc_pnet_enter(pnettable, &pnetelem); |
890a2cb4 HW |
431 | if (pnetelem.ndev) |
432 | dev_put(pnetelem.ndev); | |
6812baab TR |
433 | return rc; |
434 | } | |
435 | ||
436 | static int smc_pnet_del(struct sk_buff *skb, struct genl_info *info) | |
437 | { | |
64e28b52 HW |
438 | struct net *net = genl_info_net(info); |
439 | ||
d49baa7e EB |
440 | if (!info->attrs[SMC_PNETID_NAME]) |
441 | return -EINVAL; | |
64e28b52 | 442 | return smc_pnet_remove_by_pnetid(net, |
6812baab TR |
443 | (char *)nla_data(info->attrs[SMC_PNETID_NAME])); |
444 | } | |
445 | ||
446 | static int smc_pnet_dump_start(struct netlink_callback *cb) | |
447 | { | |
448 | cb->args[0] = 0; | |
449 | return 0; | |
450 | } | |
451 | ||
452 | static int smc_pnet_dumpinfo(struct sk_buff *skb, | |
453 | u32 portid, u32 seq, u32 flags, | |
890a2cb4 | 454 | struct smc_user_pnetentry *pnetelem) |
6812baab TR |
455 | { |
456 | void *hdr; | |
457 | ||
458 | hdr = genlmsg_put(skb, portid, seq, &smc_pnet_nl_family, | |
459 | flags, SMC_PNETID_GET); | |
460 | if (!hdr) | |
461 | return -ENOMEM; | |
462 | if (smc_pnet_set_nla(skb, pnetelem) < 0) { | |
463 | genlmsg_cancel(skb, hdr); | |
464 | return -EMSGSIZE; | |
465 | } | |
466 | genlmsg_end(skb, hdr); | |
467 | return 0; | |
468 | } | |
469 | ||
64e28b52 HW |
470 | static int _smc_pnet_dump(struct net *net, struct sk_buff *skb, u32 portid, |
471 | u32 seq, u8 *pnetid, int start_idx) | |
6812baab | 472 | { |
890a2cb4 | 473 | struct smc_user_pnetentry tmp_entry; |
64e28b52 | 474 | struct smc_pnettable *pnettable; |
6812baab | 475 | struct smc_pnetentry *pnetelem; |
890a2cb4 | 476 | struct smc_ib_device *ibdev; |
f3d74b22 | 477 | struct smcd_dev *smcd_dev; |
64e28b52 | 478 | struct smc_net *sn; |
6812baab | 479 | int idx = 0; |
890a2cb4 | 480 | int ibport; |
6812baab | 481 | |
64e28b52 HW |
482 | /* get pnettable for namespace */ |
483 | sn = net_generic(net, smc_net_id); | |
484 | pnettable = &sn->pnettable; | |
485 | ||
890a2cb4 | 486 | /* dump netdevices */ |
64e28b52 HW |
487 | read_lock(&pnettable->lock); |
488 | list_for_each_entry(pnetelem, &pnettable->pnetlist, list) { | |
890a2cb4 HW |
489 | if (pnetid && !smc_pnet_match(pnetelem->pnet_name, pnetid)) |
490 | continue; | |
491 | if (idx++ < start_idx) | |
6812baab | 492 | continue; |
890a2cb4 HW |
493 | memset(&tmp_entry, 0, sizeof(tmp_entry)); |
494 | memcpy(&tmp_entry.pnet_name, pnetelem->pnet_name, | |
495 | SMC_MAX_PNETID_LEN); | |
496 | tmp_entry.ndev = pnetelem->ndev; | |
497 | if (smc_pnet_dumpinfo(skb, portid, seq, NLM_F_MULTI, | |
498 | &tmp_entry)) { | |
6812baab TR |
499 | --idx; |
500 | break; | |
501 | } | |
502 | } | |
64e28b52 HW |
503 | read_unlock(&pnettable->lock); |
504 | ||
505 | /* if this is not the initial namespace, stop here */ | |
506 | if (net != &init_net) | |
507 | return idx; | |
890a2cb4 HW |
508 | |
509 | /* dump ib devices */ | |
510 | spin_lock(&smc_ib_devices.lock); | |
511 | list_for_each_entry(ibdev, &smc_ib_devices.list, list) { | |
512 | for (ibport = 0; ibport < SMC_MAX_PORTS; ibport++) { | |
513 | if (ibdev->pnetid_by_user[ibport]) { | |
514 | if (pnetid && | |
515 | !smc_pnet_match(ibdev->pnetid[ibport], | |
516 | pnetid)) | |
517 | continue; | |
518 | if (idx++ < start_idx) | |
519 | continue; | |
520 | memset(&tmp_entry, 0, sizeof(tmp_entry)); | |
521 | memcpy(&tmp_entry.pnet_name, | |
522 | ibdev->pnetid[ibport], | |
523 | SMC_MAX_PNETID_LEN); | |
524 | tmp_entry.smcibdev = ibdev; | |
525 | tmp_entry.ib_port = ibport + 1; | |
526 | if (smc_pnet_dumpinfo(skb, portid, seq, | |
527 | NLM_F_MULTI, | |
528 | &tmp_entry)) { | |
529 | --idx; | |
530 | break; | |
531 | } | |
532 | } | |
533 | } | |
534 | } | |
535 | spin_unlock(&smc_ib_devices.lock); | |
536 | ||
f3d74b22 HW |
537 | /* dump smcd devices */ |
538 | spin_lock(&smcd_dev_list.lock); | |
539 | list_for_each_entry(smcd_dev, &smcd_dev_list.list, list) { | |
540 | if (smcd_dev->pnetid_by_user) { | |
541 | if (pnetid && !smc_pnet_match(smcd_dev->pnetid, pnetid)) | |
542 | continue; | |
543 | if (idx++ < start_idx) | |
544 | continue; | |
545 | memset(&tmp_entry, 0, sizeof(tmp_entry)); | |
546 | memcpy(&tmp_entry.pnet_name, smcd_dev->pnetid, | |
547 | SMC_MAX_PNETID_LEN); | |
548 | tmp_entry.smcd_dev = smcd_dev; | |
549 | if (smc_pnet_dumpinfo(skb, portid, seq, NLM_F_MULTI, | |
550 | &tmp_entry)) { | |
551 | --idx; | |
552 | break; | |
553 | } | |
554 | } | |
555 | } | |
556 | spin_unlock(&smcd_dev_list.lock); | |
557 | ||
890a2cb4 HW |
558 | return idx; |
559 | } | |
560 | ||
561 | static int smc_pnet_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
562 | { | |
64e28b52 | 563 | struct net *net = sock_net(skb->sk); |
890a2cb4 HW |
564 | int idx; |
565 | ||
64e28b52 | 566 | idx = _smc_pnet_dump(net, skb, NETLINK_CB(cb->skb).portid, |
890a2cb4 HW |
567 | cb->nlh->nlmsg_seq, NULL, cb->args[0]); |
568 | ||
569 | cb->args[0] = idx; | |
6812baab TR |
570 | return skb->len; |
571 | } | |
572 | ||
890a2cb4 HW |
573 | /* Retrieve one PNETID entry */ |
574 | static int smc_pnet_get(struct sk_buff *skb, struct genl_info *info) | |
575 | { | |
64e28b52 | 576 | struct net *net = genl_info_net(info); |
890a2cb4 HW |
577 | struct sk_buff *msg; |
578 | void *hdr; | |
579 | ||
580 | if (!info->attrs[SMC_PNETID_NAME]) | |
581 | return -EINVAL; | |
582 | ||
583 | msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); | |
584 | if (!msg) | |
585 | return -ENOMEM; | |
586 | ||
64e28b52 | 587 | _smc_pnet_dump(net, msg, info->snd_portid, info->snd_seq, |
890a2cb4 HW |
588 | nla_data(info->attrs[SMC_PNETID_NAME]), 0); |
589 | ||
590 | /* finish multi part message and send it */ | |
591 | hdr = nlmsg_put(msg, info->snd_portid, info->snd_seq, NLMSG_DONE, 0, | |
592 | NLM_F_MULTI); | |
593 | if (!hdr) { | |
594 | nlmsg_free(msg); | |
595 | return -EMSGSIZE; | |
596 | } | |
597 | return genlmsg_reply(msg, info); | |
598 | } | |
599 | ||
6812baab TR |
600 | /* Remove and delete all pnetids from pnet table. |
601 | */ | |
602 | static int smc_pnet_flush(struct sk_buff *skb, struct genl_info *info) | |
603 | { | |
64e28b52 HW |
604 | struct net *net = genl_info_net(info); |
605 | ||
606 | return smc_pnet_remove_by_pnetid(net, NULL); | |
6812baab TR |
607 | } |
608 | ||
609 | /* SMC_PNETID generic netlink operation definition */ | |
610 | static const struct genl_ops smc_pnet_ops[] = { | |
611 | { | |
612 | .cmd = SMC_PNETID_GET, | |
613 | .flags = GENL_ADMIN_PERM, | |
614 | .policy = smc_pnet_policy, | |
615 | .doit = smc_pnet_get, | |
616 | .dumpit = smc_pnet_dump, | |
617 | .start = smc_pnet_dump_start | |
618 | }, | |
619 | { | |
620 | .cmd = SMC_PNETID_ADD, | |
621 | .flags = GENL_ADMIN_PERM, | |
622 | .policy = smc_pnet_policy, | |
623 | .doit = smc_pnet_add | |
624 | }, | |
625 | { | |
626 | .cmd = SMC_PNETID_DEL, | |
627 | .flags = GENL_ADMIN_PERM, | |
628 | .policy = smc_pnet_policy, | |
629 | .doit = smc_pnet_del | |
630 | }, | |
631 | { | |
632 | .cmd = SMC_PNETID_FLUSH, | |
633 | .flags = GENL_ADMIN_PERM, | |
634 | .policy = smc_pnet_policy, | |
635 | .doit = smc_pnet_flush | |
636 | } | |
637 | }; | |
638 | ||
639 | /* SMC_PNETID family definition */ | |
56ce3c5a | 640 | static struct genl_family smc_pnet_nl_family __ro_after_init = { |
6812baab TR |
641 | .hdrsize = 0, |
642 | .name = SMCR_GENL_FAMILY_NAME, | |
643 | .version = SMCR_GENL_FAMILY_VERSION, | |
644 | .maxattr = SMC_PNETID_MAX, | |
645 | .netnsok = true, | |
646 | .module = THIS_MODULE, | |
647 | .ops = smc_pnet_ops, | |
648 | .n_ops = ARRAY_SIZE(smc_pnet_ops) | |
649 | }; | |
650 | ||
651 | static int smc_pnet_netdev_event(struct notifier_block *this, | |
652 | unsigned long event, void *ptr) | |
653 | { | |
654 | struct net_device *event_dev = netdev_notifier_info_to_dev(ptr); | |
655 | ||
656 | switch (event) { | |
657 | case NETDEV_REBOOT: | |
658 | case NETDEV_UNREGISTER: | |
659 | smc_pnet_remove_by_ndev(event_dev); | |
be6a3f38 | 660 | return NOTIFY_OK; |
6812baab | 661 | default: |
be6a3f38 | 662 | return NOTIFY_DONE; |
6812baab | 663 | } |
6812baab TR |
664 | } |
665 | ||
666 | static struct notifier_block smc_netdev_notifier = { | |
667 | .notifier_call = smc_pnet_netdev_event | |
668 | }; | |
669 | ||
64e28b52 HW |
670 | /* init network namespace */ |
671 | int smc_pnet_net_init(struct net *net) | |
672 | { | |
673 | struct smc_net *sn = net_generic(net, smc_net_id); | |
674 | struct smc_pnettable *pnettable = &sn->pnettable; | |
675 | ||
676 | INIT_LIST_HEAD(&pnettable->pnetlist); | |
677 | rwlock_init(&pnettable->lock); | |
678 | ||
679 | return 0; | |
680 | } | |
681 | ||
6812baab TR |
682 | int __init smc_pnet_init(void) |
683 | { | |
684 | int rc; | |
685 | ||
686 | rc = genl_register_family(&smc_pnet_nl_family); | |
687 | if (rc) | |
688 | return rc; | |
689 | rc = register_netdevice_notifier(&smc_netdev_notifier); | |
690 | if (rc) | |
691 | genl_unregister_family(&smc_pnet_nl_family); | |
692 | return rc; | |
693 | } | |
694 | ||
64e28b52 HW |
695 | /* exit network namespace */ |
696 | void smc_pnet_net_exit(struct net *net) | |
697 | { | |
698 | /* flush pnet table */ | |
699 | smc_pnet_remove_by_pnetid(net, NULL); | |
700 | } | |
701 | ||
6812baab TR |
702 | void smc_pnet_exit(void) |
703 | { | |
6812baab TR |
704 | unregister_netdevice_notifier(&smc_netdev_notifier); |
705 | genl_unregister_family(&smc_pnet_nl_family); | |
706 | } | |
707 | ||
0afff91c UB |
708 | /* Determine one base device for stacked net devices. |
709 | * If the lower device level contains more than one devices | |
710 | * (for instance with bonding slaves), just the first device | |
711 | * is used to reach a base device. | |
6812baab | 712 | */ |
0afff91c | 713 | static struct net_device *pnet_find_base_ndev(struct net_device *ndev) |
6812baab | 714 | { |
0afff91c | 715 | int i, nest_lvl; |
6812baab | 716 | |
0afff91c UB |
717 | rtnl_lock(); |
718 | nest_lvl = dev_get_nest_level(ndev); | |
719 | for (i = 0; i < nest_lvl; i++) { | |
720 | struct list_head *lower = &ndev->adj_list.lower; | |
721 | ||
722 | if (list_empty(lower)) | |
723 | break; | |
724 | lower = lower->next; | |
725 | ndev = netdev_lower_get_next(ndev, &lower); | |
726 | } | |
727 | rtnl_unlock(); | |
728 | return ndev; | |
729 | } | |
730 | ||
64e28b52 | 731 | static int smc_pnet_find_ndev_pnetid_by_table(struct net_device *ndev, |
890a2cb4 HW |
732 | u8 *pnetid) |
733 | { | |
64e28b52 HW |
734 | struct smc_pnettable *pnettable; |
735 | struct net *net = dev_net(ndev); | |
890a2cb4 | 736 | struct smc_pnetentry *pnetelem; |
64e28b52 | 737 | struct smc_net *sn; |
890a2cb4 HW |
738 | int rc = -ENOENT; |
739 | ||
64e28b52 HW |
740 | /* get pnettable for namespace */ |
741 | sn = net_generic(net, smc_net_id); | |
742 | pnettable = &sn->pnettable; | |
743 | ||
744 | read_lock(&pnettable->lock); | |
745 | list_for_each_entry(pnetelem, &pnettable->pnetlist, list) { | |
746 | if (ndev == pnetelem->ndev) { | |
890a2cb4 HW |
747 | /* get pnetid of netdev device */ |
748 | memcpy(pnetid, pnetelem->pnet_name, SMC_MAX_PNETID_LEN); | |
749 | rc = 0; | |
750 | break; | |
751 | } | |
752 | } | |
64e28b52 | 753 | read_unlock(&pnettable->lock); |
890a2cb4 HW |
754 | return rc; |
755 | } | |
756 | ||
54903572 UB |
757 | /* if handshake network device belongs to a roce device, return its |
758 | * IB device and port | |
759 | */ | |
760 | static void smc_pnet_find_rdma_dev(struct net_device *netdev, | |
761 | struct smc_ib_device **smcibdev, | |
762 | u8 *ibport, unsigned short vlan_id, u8 gid[]) | |
763 | { | |
764 | struct smc_ib_device *ibdev; | |
765 | ||
766 | spin_lock(&smc_ib_devices.lock); | |
767 | list_for_each_entry(ibdev, &smc_ib_devices.list, list) { | |
768 | struct net_device *ndev; | |
769 | int i; | |
770 | ||
771 | for (i = 1; i <= SMC_MAX_PORTS; i++) { | |
772 | if (!rdma_is_port_valid(ibdev->ibdev, i)) | |
773 | continue; | |
774 | if (!ibdev->ibdev->ops.get_netdev) | |
775 | continue; | |
776 | ndev = ibdev->ibdev->ops.get_netdev(ibdev->ibdev, i); | |
777 | if (!ndev) | |
778 | continue; | |
779 | dev_put(ndev); | |
780 | if (netdev == ndev && | |
781 | smc_ib_port_active(ibdev, i) && | |
782 | !smc_ib_determine_gid(ibdev, i, vlan_id, gid, | |
783 | NULL)) { | |
784 | *smcibdev = ibdev; | |
785 | *ibport = i; | |
786 | break; | |
787 | } | |
788 | } | |
789 | } | |
790 | spin_unlock(&smc_ib_devices.lock); | |
791 | } | |
792 | ||
0afff91c | 793 | /* Determine the corresponding IB device port based on the hardware PNETID. |
7005ada6 UB |
794 | * Searching stops at the first matching active IB device port with vlan_id |
795 | * configured. | |
54903572 UB |
796 | * If nothing found, check pnetid table. |
797 | * If nothing found, try to use handshake device | |
0afff91c UB |
798 | */ |
799 | static void smc_pnet_find_roce_by_pnetid(struct net_device *ndev, | |
800 | struct smc_ib_device **smcibdev, | |
7005ada6 UB |
801 | u8 *ibport, unsigned short vlan_id, |
802 | u8 gid[]) | |
0afff91c UB |
803 | { |
804 | u8 ndev_pnetid[SMC_MAX_PNETID_LEN]; | |
805 | struct smc_ib_device *ibdev; | |
806 | int i; | |
807 | ||
808 | ndev = pnet_find_base_ndev(ndev); | |
809 | if (smc_pnetid_by_dev_port(ndev->dev.parent, ndev->dev_port, | |
890a2cb4 | 810 | ndev_pnetid) && |
54903572 UB |
811 | smc_pnet_find_ndev_pnetid_by_table(ndev, ndev_pnetid)) { |
812 | smc_pnet_find_rdma_dev(ndev, smcibdev, ibport, vlan_id, gid); | |
0afff91c | 813 | return; /* pnetid could not be determined */ |
54903572 | 814 | } |
0afff91c UB |
815 | |
816 | spin_lock(&smc_ib_devices.lock); | |
817 | list_for_each_entry(ibdev, &smc_ib_devices.list, list) { | |
818 | for (i = 1; i <= SMC_MAX_PORTS; i++) { | |
7005ada6 UB |
819 | if (!rdma_is_port_valid(ibdev->ibdev, i)) |
820 | continue; | |
890a2cb4 | 821 | if (smc_pnet_match(ibdev->pnetid[i - 1], ndev_pnetid) && |
7005ada6 UB |
822 | smc_ib_port_active(ibdev, i) && |
823 | !smc_ib_determine_gid(ibdev, i, vlan_id, gid, | |
824 | NULL)) { | |
0afff91c UB |
825 | *smcibdev = ibdev; |
826 | *ibport = i; | |
7005ada6 | 827 | goto out; |
0afff91c UB |
828 | } |
829 | } | |
830 | } | |
7005ada6 | 831 | out: |
0afff91c UB |
832 | spin_unlock(&smc_ib_devices.lock); |
833 | } | |
834 | ||
1619f770 HW |
835 | static void smc_pnet_find_ism_by_pnetid(struct net_device *ndev, |
836 | struct smcd_dev **smcismdev) | |
837 | { | |
838 | u8 ndev_pnetid[SMC_MAX_PNETID_LEN]; | |
839 | struct smcd_dev *ismdev; | |
840 | ||
841 | ndev = pnet_find_base_ndev(ndev); | |
842 | if (smc_pnetid_by_dev_port(ndev->dev.parent, ndev->dev_port, | |
f3d74b22 HW |
843 | ndev_pnetid) && |
844 | smc_pnet_find_ndev_pnetid_by_table(ndev, ndev_pnetid)) | |
1619f770 HW |
845 | return; /* pnetid could not be determined */ |
846 | ||
847 | spin_lock(&smcd_dev_list.lock); | |
848 | list_for_each_entry(ismdev, &smcd_dev_list.list, list) { | |
f3d74b22 | 849 | if (smc_pnet_match(ismdev->pnetid, ndev_pnetid)) { |
1619f770 HW |
850 | *smcismdev = ismdev; |
851 | break; | |
852 | } | |
853 | } | |
854 | spin_unlock(&smcd_dev_list.lock); | |
855 | } | |
856 | ||
0afff91c UB |
857 | /* PNET table analysis for a given sock: |
858 | * determine ib_device and port belonging to used internal TCP socket | |
859 | * ethernet interface. | |
860 | */ | |
861 | void smc_pnet_find_roce_resource(struct sock *sk, | |
7005ada6 UB |
862 | struct smc_ib_device **smcibdev, u8 *ibport, |
863 | unsigned short vlan_id, u8 gid[]) | |
0afff91c UB |
864 | { |
865 | struct dst_entry *dst = sk_dst_get(sk); | |
866 | ||
867 | *smcibdev = NULL; | |
868 | *ibport = 0; | |
869 | ||
870 | if (!dst) | |
871 | goto out; | |
872 | if (!dst->dev) | |
873 | goto out_rel; | |
874 | ||
7005ada6 | 875 | smc_pnet_find_roce_by_pnetid(dst->dev, smcibdev, ibport, vlan_id, gid); |
0afff91c | 876 | |
6812baab TR |
877 | out_rel: |
878 | dst_release(dst); | |
0afff91c UB |
879 | out: |
880 | return; | |
6812baab | 881 | } |
1619f770 HW |
882 | |
883 | void smc_pnet_find_ism_resource(struct sock *sk, struct smcd_dev **smcismdev) | |
884 | { | |
885 | struct dst_entry *dst = sk_dst_get(sk); | |
886 | ||
887 | *smcismdev = NULL; | |
888 | if (!dst) | |
889 | goto out; | |
890 | if (!dst->dev) | |
891 | goto out_rel; | |
892 | ||
1619f770 HW |
893 | smc_pnet_find_ism_by_pnetid(dst->dev, smcismdev); |
894 | ||
895 | out_rel: | |
896 | dst_release(dst); | |
897 | out: | |
898 | return; | |
899 | } |