4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU Lesser General Public License as
8 * published by the Free Software Foundation; either version 2.1 of the
9 * License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful, but
12 * WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library. If not, see <http://www.gnu.org/licenses/>.
21 * Copyright (c) 2014, 2017, Intel Corporation.
24 * Amir Shehata <amir.shehata@intel.com>
27 #ifndef LIB_LNET_CONFIG_API_H
28 #define LIB_LNET_CONFIG_API_H
31 #include <libcfs/util/string.h>
32 #include <linux/lnet/lnet-dlc.h>
33 #include <linux/lnet/nidstr.h>
35 #define LUSTRE_CFG_RC_NO_ERR 0
36 #define LUSTRE_CFG_RC_BAD_PARAM -1
37 #define LUSTRE_CFG_RC_MISSING_PARAM -2
38 #define LUSTRE_CFG_RC_OUT_OF_RANGE_PARAM -3
39 #define LUSTRE_CFG_RC_OUT_OF_MEM -4
40 #define LUSTRE_CFG_RC_GENERIC_ERR -5
41 #define LUSTRE_CFG_RC_NO_MATCH -6
42 #define LUSTRE_CFG_RC_MATCH -7
43 #define LUSTRE_CFG_RC_SKIP -8
44 #define LUSTRE_CFG_RC_LAST_ELEM -9
46 struct lnet_dlc_network_descr {
47 struct list_head network_on_rule;
49 struct list_head nw_intflist;
52 struct lnet_dlc_intf_descr {
53 struct list_head intf_on_network;
54 char intf_name[IFNAMSIZ];
55 struct cfs_expr_list *cpt_expr;
58 /* forward declaration of the cYAML structure. */
62 * lustre_lnet_config_lib_init()
63 * Initialize the Library to enable communication with the LNET kernel
64 * module. Returns the device ID or -EINVAL if there is an error
66 int lustre_lnet_config_lib_init();
69 * lustre_lnet_config_lib_uninit
70 * Uninitialize the DLC Library
72 void lustre_lnet_config_lib_uninit();
75 * lustre_lnet_config_ni_system
76 * Initialize/Uninitialize the lnet NI system.
78 * up - whehter to init or uninit the system
79 * load_ni_from_mod - load NI from mod params.
80 * seq_no - sequence number of the request
81 * err_rc - [OUT] struct cYAML tree describing the error. Freed by
84 int lustre_lnet_config_ni_system(bool up, bool load_ni_from_mod,
85 int seq_no, struct cYAML **err_rc);
88 * lustre_lnet_config_route
89 * Send down an IOCTL to the kernel to configure the route
93 * hops - number of hops passed down by the user
94 * prio - priority of the route
95 * seq_no - sequence number of the request
96 * err_rc - [OUT] struct cYAML tree describing the error. Freed by caller
98 int lustre_lnet_config_route(char *nw, char *gw, int hops, int prio,
99 int seq_no, struct cYAML **err_rc);
102 * lustre_lnet_del_route
103 * Send down an IOCTL to the kernel to delete a route
107 * seq_no - sequence number of the request
108 * err_rc - [OUT] struct cYAML tree describing the error. Freed by caller
110 int lustre_lnet_del_route(char *nw, char *gw, int seq_no,
111 struct cYAML **err_rc);
114 * lustre_lnet_show_route
115 * Send down an IOCTL to the kernel to show routes
116 * This function will get one route at a time and filter according to
117 * provided parameters. If no routes are available then it will dump all
118 * routes that are in the system.
120 * nw - network. Optional. Used to filter output
121 * gw - gateway. Optional. Used to filter ouptut
122 * hops - number of hops passed down by the user
123 * Optional. Used to filter output.
124 * prio - priority of the route. Optional. Used to filter output.
125 * detail - flag to indicate whether detail output is required
126 * seq_no - sequence number of the request
127 * show_rc - [OUT] The show output in YAML. Must be freed by caller.
128 * err_rc - [OUT] struct cYAML tree describing the error. Freed by caller
129 * backup - true to output only what's necessary for reconfiguring
132 int lustre_lnet_show_route(char *nw, char *gw,
133 int hops, int prio, int detail,
134 int seq_no, struct cYAML **show_rc,
135 struct cYAML **err_rc, bool backup);
138 * lustre_lnet_config_ni
139 * Send down an IOCTL to configure a network interface. It implicitly
140 * creates a network if one doesn't exist..
142 * nw_descr - network and interface descriptor
143 * global_cpts - globally defined CPTs
144 * ip2net - this parameter allows configuring multiple networks.
145 * it takes precedence over the net and intf parameters
146 * tunables - LND tunables
147 * seq_no - sequence number of the request
148 * lnd_tunables - lnet specific tunable parameters
149 * err_rc - [OUT] struct cYAML tree describing the error. Freed by caller
151 int lustre_lnet_config_ni(struct lnet_dlc_network_descr *nw_descr,
152 struct cfs_expr_list *global_cpts,
154 struct lnet_ioctl_config_lnd_tunables *tunables,
155 int seq_no, struct cYAML **err_rc);
159 * Send down an IOCTL to delete a network interface. It implicitly
160 * deletes a network if it becomes empty of nis
162 * nw - network and interface list
163 * seq_no - sequence number of the request
164 * err_rc - [OUT] struct cYAML tree describing the error. Freed by caller
166 int lustre_lnet_del_ni(struct lnet_dlc_network_descr *nw,
167 int seq_no, struct cYAML **err_rc);
170 * lustre_lnet_show_net
171 * Send down an IOCTL to show networks.
172 * This function will use the nw paramter to filter the output. If it's
173 * not provided then all networks are listed.
175 * nw - network to show. Optional. Used to filter output.
176 * detail - flag to indicate if we require detail output.
177 * seq_no - sequence number of the request
178 * show_rc - [OUT] The show output in YAML. Must be freed by caller.
179 * err_rc - [OUT] struct cYAML tree describing the error. Freed by caller
180 * backup - true to output only what's necessary for reconfiguring
183 int lustre_lnet_show_net(char *nw, int detail, int seq_no,
184 struct cYAML **show_rc, struct cYAML **err_rc,
188 * lustre_lnet_enable_routing
189 * Send down an IOCTL to enable or diable routing
191 * enable - 1 to enable routing, 0 to disable routing
192 * seq_no - sequence number of the request
193 * err_rc - [OUT] struct cYAML tree describing the error. Freed by caller
195 int lustre_lnet_enable_routing(int enable, int seq_no,
196 struct cYAML **err_rc);
199 * lustre_lnet_config_numa_range
200 * Set the NUMA range which impacts the NIs to be selected
201 * during sending. If the NUMA range is large the NUMA
202 * distance between the message memory and the NI becomes
203 * less significant. The NUMA range is a relative number
204 * with no other meaning besides allowing a wider breadth
205 * for picking an NI to send from.
207 * range - numa range value.
208 * seq_no - sequence number of the request
209 * err_rc - [OUT] struct cYAML tree describing the error. Freed by
212 int lustre_lnet_config_numa_range(int range, int seq_no,
213 struct cYAML **err_rc);
216 * lustre_lnet_show_num_range
217 * Get the currently set NUMA range
219 * seq_no - sequence number of the request
220 * show_rc - [OUT] struct cYAML tree containing NUMA range info
221 * err_rc - [OUT] struct cYAML tree describing the error. Freed by
224 int lustre_lnet_show_numa_range(int seq_no, struct cYAML **show_rc,
225 struct cYAML **err_rc);
228 * lustre_lnet_config_transaction_to
229 * sets the timeout after which a message expires or a timeout event is
230 * propagated for an expired response.
232 * timeout - timeout value to configure
233 * seq_no - sequence number of the request
234 * err_rc - [OUT] struct cYAML tree describing the error. Freed by
237 int lustre_lnet_config_transaction_to(int timeout, int seq_no, struct cYAML **err_rc);
240 * lustre_lnet_show_transaction_to
241 * show the transaction timeout in the system
243 * seq_no - sequence number of the request
244 * show_rc - [OUT] struct cYAML tree containing transaction timeout info
245 * err_rc - [OUT] struct cYAML tree describing the error. Freed by
248 int lustre_lnet_show_transaction_to(int seq_no, struct cYAML **show_rc,
249 struct cYAML **err_rc);
252 * lustre_lnet_config_retry_count
253 * sets the maximum number of retries to resend a message
255 * count - maximum value to configure
256 * seq_no - sequence number of the request
257 * err_rc - [OUT] struct cYAML tree describing the error. Freed by
260 int lustre_lnet_config_retry_count(int count, int seq_no, struct cYAML **err_rc);
263 * lustre_lnet_show_retry_count
264 * show current maximum number of retries in the system
266 * seq_no - sequence number of the request
267 * show_rc - [OUT] struct cYAML tree containing retry count info
268 * err_rc - [OUT] struct cYAML tree describing the error. Freed by
271 int lustre_lnet_show_retry_count(int seq_no, struct cYAML **show_rc,
272 struct cYAML **err_rc);
275 * lustre_lnet_config_max_intf
276 * Sets the maximum number of interfaces per node. this tunable is
277 * primarily useful for sanity checks prior to allocating memory.
279 * max - maximum value to configure
280 * seq_no - sequence number of the request
281 * err_rc - [OUT] struct cYAML tree describing the error. Freed by
284 int lustre_lnet_config_max_intf(int max, int seq_no, struct cYAML **err_rc);
287 * lustre_lnet_show_max_intf
288 * show current maximum interface setting
290 * seq_no - sequence number of the request
291 * show_rc - [OUT] struct cYAML tree containing NUMA range info
292 * err_rc - [OUT] struct cYAML tree describing the error. Freed by
295 int lustre_lnet_show_max_intf(int seq_no, struct cYAML **show_rc,
296 struct cYAML **err_rc);
299 * lustre_lnet_config_discovery
300 * Enable or disable peer discovery. Peer discovery is enabled by default.
302 * enable - non-0 enables, 0 disables
303 * seq_no - sequence number of the request
304 * err_rc - [OUT] struct cYAML tree describing the error. Freed by
307 int lustre_lnet_config_discovery(int enable, int seq_no, struct cYAML **err_rc);
310 * lustre_lnet_show_discovery
311 * show current peer discovery setting
313 * seq_no - sequence number of the request
314 * show_rc - [OUT] struct cYAML tree containing NUMA range info
315 * err_rc - [OUT] struct cYAML tree describing the error. Freed by
318 int lustre_lnet_show_discovery(int seq_no, struct cYAML **show_rc,
319 struct cYAML **err_rc);
322 * lustre_lnet_config_buffers
323 * Send down an IOCTL to configure routing buffer sizes. A value of 0 means
324 * default that particular buffer to default size. A value of -1 means
325 * leave the value of the buffer un changed.
327 * tiny - tiny buffers
328 * small - small buffers
329 * large - large buffers.
330 * seq_no - sequence number of the request
331 * err_rc - [OUT] struct cYAML tree describing the error. Freed by caller
333 int lustre_lnet_config_buffers(int tiny, int small, int large,
334 int seq_no, struct cYAML **err_rc);
337 * lustre_lnet_show_routing
338 * Send down an IOCTL to dump buffers and routing status
339 * This function is used to dump buffers for all CPU partitions.
341 * seq_no - sequence number of the request
342 * show_rc - [OUT] The show output in YAML. Must be freed by caller.
343 * err_rc - [OUT] struct cYAML tree describing the error. Freed by caller
344 * backup - true to output only what's necessary for reconfiguring
347 int lustre_lnet_show_routing(int seq_no, struct cYAML **show_rc,
348 struct cYAML **err_rc, bool backup);
351 * lustre_lnet_show_stats
352 * Shows internal LNET statistics. This is useful to display the
353 * current LNET activity, such as number of messages route, etc
355 * seq_no - sequence number of the command
356 * show_rc - YAML structure of the resultant show
357 * err_rc - YAML strucutre of the resultant return code.
359 int lustre_lnet_show_stats(int seq_no, struct cYAML **show_rc,
360 struct cYAML **err_rc);
363 * lustre_lnet_config_peer_nid
364 * Add a peer nid to a peer with primary nid pnid. If no pnid is given
365 * then the first nid in the nid list becomes the primary nid for
366 * a newly created peer.
367 * Otherwise if pnid is provided and it's unique then a new peer is
368 * created with pnid as the primary NID and the nids in the nid list as
370 * If any of the peers nids provided in with exception to the pnid is
371 * not unique the operation fails. Some peer nids might have already
372 * been added. It's the role of the caller of this API to remove the
373 * added NIDs if they wish.
375 * pnid - Primary NID of the peer
376 * nid - list of nids to add
377 * num_nids - number of nids in the nid array
378 * mr - true if this peer is MR capable.
379 * ip2nets - true if a list of nid expressions are given to configure
381 * seq_no - sequence number of the command
382 * err_rc - YAML strucutre of the resultant return code.
384 int lustre_lnet_config_peer_nid(char *pnid, char **nid, int num_nids,
385 bool mr, bool ip2nets, int seq_no,
386 struct cYAML **err_rc);
389 * lustre_lnet_del_peer_nid
390 * Delete the nids given in the nid list from the peer with primary NID
391 * pnid. If pnid is NULL or it doesn't identify a peer the operation
392 * fails and no change happens to the system.
393 * The operation is aborted on the first NID that fails to be deleted.
395 * pnid - Primary NID of the peer
396 * nid - list of nids to add
397 * num_nids - number of nids in the nid array
398 * ip2nets - used to specify a range of nids
399 * seq_no - sequence number of the command
400 * err_rc - YAML strucutre of the resultant return code.
402 int lustre_lnet_del_peer_nid(char *pnid, char **nid, int num_nids,
403 bool ip2nets, int seq_no, struct cYAML **err_rc);
406 * lustre_lnet_show_peer
407 * Show the peer identified by nid, knid. If knid is NULL all
408 * peers in the system are shown.
410 * knid - A NID of the peer
411 * detail - display detailed information
412 * seq_no - sequence number of the command
413 * show_rc - YAML structure of the resultant show
414 * err_rc - YAML strucutre of the resultant return code.
415 * backup - true to output only what's necessary for reconfiguring
419 int lustre_lnet_show_peer(char *knid, int detail, int seq_no,
420 struct cYAML **show_rc, struct cYAML **err_rc,
424 * lustre_lnet_list_peer
425 * List the known peers.
427 * seq_no - sequence number of the command
428 * show_rc - YAML structure of the resultant show
429 * err_rc - YAML strucutre of the resultant return code.
432 int lustre_lnet_list_peer(int seq_no,
433 struct cYAML **show_rc, struct cYAML **err_rc);
435 /* lustre_lnet_ping_nid
436 * Ping the nid list, pnids.
438 * pnids - NID list to ping.
439 * timeout - timeout(seconds) for ping.
440 * seq_no - sequence number of the command.
441 * show_rc - YAML structure of the resultant show.
442 * err_rc - YAML strucutre of the resultant return code.
445 int lustre_lnet_ping_nid(char *pnid, int timeout, int seq_no,
446 struct cYAML **show_rc, struct cYAML **err_rc);
448 /* lustre_lnet_discover_nid
449 * Discover the nid list, pnids.
451 * pnids - NID list to discover.
452 * force - force discovery.
453 * seq_no - sequence number of the command.
454 * show_rc - YAML structure of the resultant show.
455 * err_rc - YAML strucutre of the resultant return code.
458 int lustre_lnet_discover_nid(char *pnid, int force, int seq_no,
459 struct cYAML **show_rc, struct cYAML **err_rc);
463 * Parses the provided YAML file and then calls the specific APIs
464 * to configure the entities identified in the file
467 * err_rc - [OUT] struct cYAML tree describing the error. Freed by caller
469 int lustre_yaml_config(char *f, struct cYAML **err_rc);
473 * Parses the provided YAML file and then calls the specific APIs
474 * to delete the entities identified in the file
477 * err_rc - [OUT] struct cYAML tree describing the error. Freed by caller
479 int lustre_yaml_del(char *f, struct cYAML **err_rc);
483 * Parses the provided YAML file and then calls the specific APIs
484 * to show the entities identified in the file
487 * show_rc - [OUT] The show output in YAML. Must be freed by caller.
488 * err_rc - [OUT] struct cYAML tree describing the error. Freed by caller
490 int lustre_yaml_show(char *f, struct cYAML **show_rc,
491 struct cYAML **err_rc);
495 * Parses the provided YAML file and then calls the specific APIs
496 * to execute the entities identified in the file
499 * show_rc - [OUT] The show output in YAML. Must be freed by caller.
500 * err_rc - [OUT] struct cYAML tree describing the error. Freed by caller
502 int lustre_yaml_exec(char *f, struct cYAML **show_rc,
503 struct cYAML **err_rc);
506 * lustre_lnet_init_nw_descr
507 * initialize the network descriptor structure for use
509 void lustre_lnet_init_nw_descr(struct lnet_dlc_network_descr *nw_descr);
512 * lustre_lnet_parse_interfaces
513 * prase an interface string and populate descriptor structures
514 * intf_str - interface string of the format
515 * <intf>[<expr>], <intf>[<expr>],..
516 * nw_descr - network descriptor to populate
517 * init - True to initialize nw_descr
519 int lustre_lnet_parse_interfaces(char *intf_str,
520 struct lnet_dlc_network_descr *nw_descr);
523 * lustre_lnet_parse_nids
524 * Parse a set of nids into a locally allocated array and return the
525 * pointer of the array to the caller. The caller is responsible for
526 * freeing the array. If an initial array is provided then copy over
527 * the contents of that array into the new array and append to it the
529 * The nids can be of the form "nid [,nid, nid, nid]"
530 * nids: nids string to be parsed
531 * array: initial array of content
532 * size: num of elements in the array
533 * out_array: [OUT] new allocated array.
534 * Returns size of array
535 * sets the out_array to NULL on failure.
537 int lustre_lnet_parse_nids(char *nids, char **array, int size,
540 #endif /* LIB_LNET_CONFIG_API_H */