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
33 #include <sys/socket.h>
35 #include <netlink/netlink.h>
36 #include <netlink/genl/genl.h>
37 #include <netlink/genl/ctrl.h>
39 #include <libcfs/util/ioctl.h>
40 #include <libcfs/util/string.h>
41 #include <linux/lnet/lnet-dlc.h>
42 #include <linux/lnet/nidstr.h>
44 #define LUSTRE_CFG_RC_NO_ERR 0
45 #define LUSTRE_CFG_RC_BAD_PARAM -1
46 #define LUSTRE_CFG_RC_MISSING_PARAM -2
47 #define LUSTRE_CFG_RC_OUT_OF_RANGE_PARAM -3
48 #define LUSTRE_CFG_RC_OUT_OF_MEM -4
49 #define LUSTRE_CFG_RC_GENERIC_ERR -5
50 #define LUSTRE_CFG_RC_NO_MATCH -6
51 #define LUSTRE_CFG_RC_MATCH -7
52 #define LUSTRE_CFG_RC_SKIP -8
53 #define LUSTRE_CFG_RC_LAST_ELEM -9
54 #define LUSTRE_CFG_RC_MARSHAL_FAIL -10
56 #define CONFIG_CMD "configure"
57 #define UNCONFIG_CMD "unconfigure"
60 #define SHOW_CMD "show"
62 #define MANAGE_CMD "manage"
64 #define MAX_NUM_IPS 128
66 #define modparam_path "/sys/module/lnet/parameters/"
67 #define o2ib_modparam_path "/sys/module/ko2iblnd/parameters/"
68 #define gni_nid_path "/proc/cray_xt/"
71 LNETCTL_CONFIG_CMD = 1,
72 LNETCTL_UNCONFIG_CMD = 2,
77 LNETCTL_MANAGE_CMD = 7,
82 * Max number of nids we'll configure for a single peer via a single DLC
85 #define LNET_MAX_NIDS_PER_PEER 128
87 struct lnet_dlc_network_descr {
88 struct list_head network_on_rule;
90 struct list_head nw_intflist;
93 struct lnet_dlc_intf_descr {
94 struct list_head intf_on_network;
95 char intf_name[IFNAMSIZ];
96 struct cfs_expr_list *cpt_expr;
99 /* This UDSP structures need to match the kernel space structures
100 * in order for the marshall and unmarshall functions to be the same.
103 /* Net is described as a
107 struct lnet_ud_net_descr {
109 struct list_head udn_net_num_range;
112 /* each NID range is defined as
114 * 2. address range descriptor
116 struct lnet_ud_nid_descr {
117 struct lnet_ud_net_descr ud_net_id;
118 struct list_head ud_addr_range;
121 /* a UDSP rule can have up to three user defined NID descriptors
122 * - src: defines the local NID range for the rule
123 * - dst: defines the peer NID range for the rule
124 * - rte: defines the router NID range for the rule
126 * An action union defines the action to take when the rule
130 struct list_head udsp_on_list;
132 struct lnet_ud_nid_descr udsp_src;
133 struct lnet_ud_nid_descr udsp_dst;
134 struct lnet_ud_nid_descr udsp_rte;
135 enum lnet_udsp_action_type udsp_action_type;
141 /* This union is passed from lnetctl to fill the action union in udsp
143 * TODO: The idea here is if we add extra actions, ex: drop, it can be
146 union lnet_udsp_action {
150 /* forward declaration of the cYAML structure. */
154 * lustre_lnet_config_lib_init()
155 * Initialize the Library to enable communication with the LNET kernel
156 * module. Returns the device ID or -EINVAL if there is an error
158 int lustre_lnet_config_lib_init();
161 * lustre_lnet_config_lib_uninit
162 * Uninitialize the DLC Library
164 void lustre_lnet_config_lib_uninit();
167 * lustre_lnet_config_ni_system
168 * Initialize/Uninitialize the lnet NI system.
170 * up - whehter to init or uninit the system
171 * load_ni_from_mod - load NI from mod params.
172 * seq_no - sequence number of the request
173 * err_rc - [OUT] struct cYAML tree describing the error. Freed by
176 int lustre_lnet_config_ni_system(bool up, bool load_ni_from_mod,
177 int seq_no, struct cYAML **err_rc);
180 * lustre_lnet_config_route
181 * Send down an IOCTL to the kernel to configure the route
185 * hops - number of hops passed down by the user
186 * prio - priority of the route
187 * sen - health sensitivity value for the gateway
188 * seq_no - sequence number of the request
189 * err_rc - [OUT] struct cYAML tree describing the error. Freed by caller
191 int lustre_lnet_config_route(char *nw, char *gw, int hops, int prio,
192 int sen, int seq_no, struct cYAML **err_rc);
195 * lustre_lnet_del_route
196 * Send down an IOCTL to the kernel to delete a route
200 * seq_no - sequence number of the request
201 * err_rc - [OUT] struct cYAML tree describing the error. Freed by caller
203 int lustre_lnet_del_route(char *nw, char *gw, int seq_no,
204 struct cYAML **err_rc);
207 * lustre_lnet_show_route
208 * Send down an IOCTL to the kernel to show routes
209 * This function will get one route at a time and filter according to
210 * provided parameters. If no routes are available then it will dump all
211 * routes that are in the system.
213 * nw - network. Optional. Used to filter output
214 * gw - gateway. Optional. Used to filter ouptut
215 * hops - number of hops passed down by the user
216 * Optional. Used to filter output.
217 * prio - priority of the route. Optional. Used to filter output.
218 * detail - flag to indicate whether detail output is required
219 * seq_no - sequence number of the request
220 * show_rc - [OUT] The show output in YAML. Must be freed by caller.
221 * err_rc - [OUT] struct cYAML tree describing the error. Freed by caller
222 * backup - true to output only what's necessary for reconfiguring
225 int lustre_lnet_show_route(char *nw, char *gw,
226 int hops, int prio, int detail,
227 int seq_no, struct cYAML **show_rc,
228 struct cYAML **err_rc, bool backup);
231 * lustre_lnet_config_ni
232 * Send down an IOCTL to configure a network interface. It implicitly
233 * creates a network if one doesn't exist..
235 * nw_descr - network and interface descriptor
236 * global_cpts - globally defined CPTs
237 * ip2net - this parameter allows configuring multiple networks.
238 * it takes precedence over the net and intf parameters
239 * tunables - LND tunables
240 * seq_no - sequence number of the request
241 * lnd_tunables - lnet specific tunable parameters
242 * err_rc - [OUT] struct cYAML tree describing the error. Freed by caller
244 int lustre_lnet_config_ni(struct lnet_dlc_network_descr *nw_descr,
245 struct cfs_expr_list *global_cpts,
247 struct lnet_ioctl_config_lnd_tunables *tunables,
248 int seq_no, struct cYAML **err_rc);
252 * Send down an IOCTL to delete a network interface. It implicitly
253 * deletes a network if it becomes empty of nis
255 * nw - network and interface list
256 * seq_no - sequence number of the request
257 * err_rc - [OUT] struct cYAML tree describing the error. Freed by caller
259 int lustre_lnet_del_ni(struct lnet_dlc_network_descr *nw,
260 int seq_no, struct cYAML **err_rc);
263 * lustre_lnet_show_net
264 * Send down an IOCTL to show networks.
265 * This function will use the nw paramter to filter the output. If it's
266 * not provided then all networks are listed.
268 * nw - network to show. Optional. Used to filter output.
269 * detail - flag to indicate if we require detail output.
270 * seq_no - sequence number of the request
271 * show_rc - [OUT] The show output in YAML. Must be freed by caller.
272 * err_rc - [OUT] struct cYAML tree describing the error. Freed by caller
273 * backup - true to output only what's necessary for reconfiguring
276 int lustre_lnet_show_net(char *nw, int detail, int seq_no,
277 struct cYAML **show_rc, struct cYAML **err_rc,
281 * lustre_lnet_enable_routing
282 * Send down an IOCTL to enable or diable routing
284 * enable - 1 to enable routing, 0 to disable routing
285 * seq_no - sequence number of the request
286 * err_rc - [OUT] struct cYAML tree describing the error. Freed by caller
288 int lustre_lnet_enable_routing(int enable, int seq_no,
289 struct cYAML **err_rc);
292 * lustre_lnet_config_numa_range
293 * Set the NUMA range which impacts the NIs to be selected
294 * during sending. If the NUMA range is large the NUMA
295 * distance between the message memory and the NI becomes
296 * less significant. The NUMA range is a relative number
297 * with no other meaning besides allowing a wider breadth
298 * for picking an NI to send from.
300 * range - numa range value.
301 * seq_no - sequence number of the request
302 * err_rc - [OUT] struct cYAML tree describing the error. Freed by
305 int lustre_lnet_config_numa_range(int range, int seq_no,
306 struct cYAML **err_rc);
309 * lustre_lnet_show_num_range
310 * Get the currently set NUMA range
312 * seq_no - sequence number of the request
313 * show_rc - [OUT] struct cYAML tree containing NUMA range info
314 * err_rc - [OUT] struct cYAML tree describing the error. Freed by
317 int lustre_lnet_show_numa_range(int seq_no, struct cYAML **show_rc,
318 struct cYAML **err_rc);
321 * lustre_lnet_config_ni_healthv
322 * set the health value of the NI. -1 resets the value to maximum.
324 * value: health value to set.
325 * all: true to set all local NIs to that value.
326 * ni_nid: NI NID to set its health value. all parameter always takes
328 * seq_no - sequence number of the request
329 * err_rc - [OUT] struct cYAML tree describing the error. Freed by
332 int lustre_lnet_config_ni_healthv(int value, bool all, char *ni_nid,
333 int seq_no, struct cYAML **err_rc);
336 * lustre_lnet_config_peer_ni_healthv
337 * set the health value of the peer NI. -1 resets the value to maximum.
339 * value: health value to set.
340 * all: true to set all local NIs to that value.
341 * pni_nid: Peer NI NID to set its health value. all parameter always takes
343 * seq_no - sequence number of the request
344 * err_rc - [OUT] struct cYAML tree describing the error. Freed by
347 int lustre_lnet_config_peer_ni_healthv(int value, bool all, char *pni_nid,
348 int seq_no, struct cYAML **err_rc);
351 * lustre_lnet_config_recov_intrv
352 * set the recovery interval in seconds. That's the interval to ping an
353 * unhealthy interface.
355 * intrv - recovery interval value to configure
356 * seq_no - sequence number of the request
357 * err_rc - [OUT] struct cYAML tree describing the error. Freed by
360 int lustre_lnet_config_recov_intrv(int intrv, int seq_no, struct cYAML **err_rc);
363 * lustre_lnet_show_recov_intrv
364 * show the recovery interval set in the system
366 * seq_no - sequence number of the request
367 * show_rc - [OUT] struct cYAML tree containing health sensitivity info
368 * err_rc - [OUT] struct cYAML tree describing the error. Freed by
371 int lustre_lnet_show_recov_intrv(int seq_no, struct cYAML **show_rc,
372 struct cYAML **err_rc);
375 * lustre_lnet_config_rtr_sensitivity
376 * sets the router sensitivity percentage. If the percentage health
377 * of a router interface drops below that it's considered failed
379 * sen - sensitivity value to configure
380 * seq_no - sequence number of the request
381 * err_rc - [OUT] struct cYAML tree describing the error. Freed by
384 int lustre_lnet_config_rtr_sensitivity(int sen, int seq_no, struct cYAML **err_rc);
387 * lustre_lnet_config_hsensitivity
388 * sets the health sensitivity; the value by which to decrement the
389 * health value of a local or peer NI. If 0 then health is turned off
391 * sen - sensitivity value to configure
392 * seq_no - sequence number of the request
393 * err_rc - [OUT] struct cYAML tree describing the error. Freed by
396 int lustre_lnet_config_hsensitivity(int sen, int seq_no, struct cYAML **err_rc);
399 * lustre_lnet_show_hsensitivity
400 * show the health sensitivity in the system
402 * seq_no - sequence number of the request
403 * show_rc - [OUT] struct cYAML tree containing health sensitivity info
404 * err_rc - [OUT] struct cYAML tree describing the error. Freed by
407 int lustre_lnet_show_hsensitivity(int seq_no, struct cYAML **show_rc,
408 struct cYAML **err_rc);
411 * lustre_lnet_show_rtr_sensitivity
412 * show the router sensitivity percentage in the system
414 * seq_no - sequence number of the request
415 * show_rc - [OUT] struct cYAML tree containing health sensitivity info
416 * err_rc - [OUT] struct cYAML tree describing the error. Freed by
419 int lustre_lnet_show_rtr_sensitivity(int seq_no, struct cYAML **show_rc,
420 struct cYAML **err_rc);
423 * lustre_lnet_config_transaction_to
424 * sets the timeout after which a message expires or a timeout event is
425 * propagated for an expired response.
427 * timeout - timeout value to configure
428 * seq_no - sequence number of the request
429 * err_rc - [OUT] struct cYAML tree describing the error. Freed by
432 int lustre_lnet_config_transaction_to(int timeout, int seq_no, struct cYAML **err_rc);
435 * lustre_lnet_show_transaction_to
436 * show the transaction timeout in the system
438 * seq_no - sequence number of the request
439 * show_rc - [OUT] struct cYAML tree containing transaction timeout info
440 * err_rc - [OUT] struct cYAML tree describing the error. Freed by
443 int lustre_lnet_show_transaction_to(int seq_no, struct cYAML **show_rc,
444 struct cYAML **err_rc);
447 * lustre_lnet_config_retry_count
448 * sets the maximum number of retries to resend a message
450 * count - maximum value to configure
451 * seq_no - sequence number of the request
452 * err_rc - [OUT] struct cYAML tree describing the error. Freed by
455 int lustre_lnet_config_retry_count(int count, int seq_no, struct cYAML **err_rc);
458 * lustre_lnet_show_retry_count
459 * show current maximum number of retries in the system
461 * seq_no - sequence number of the request
462 * show_rc - [OUT] struct cYAML tree containing retry count info
463 * err_rc - [OUT] struct cYAML tree describing the error. Freed by
466 int lustre_lnet_show_retry_count(int seq_no, struct cYAML **show_rc,
467 struct cYAML **err_rc);
469 int lustre_lnet_show_lnd_timeout(int seq_no, struct cYAML **show_rc,
470 struct cYAML **err_rc);
472 int lustre_lnet_show_local_ni_recovq(int seq_no, struct cYAML **show_rc,
473 struct cYAML **err_rc);
475 int lustre_lnet_show_peer_ni_recovq(int seq_no, struct cYAML **show_rc,
476 struct cYAML **err_rc);
477 int lustre_lnet_config_response_tracking(int count, int seq_no,
478 struct cYAML **err_rc);
479 int lustre_lnet_show_response_tracking(int seq_no, struct cYAML **show_rc,
480 struct cYAML **err_rc);
481 int lustre_lnet_config_recovery_limit(int val, int seq_no,
482 struct cYAML **err_rc);
483 int lustre_lnet_show_recovery_limit(int seq_no, struct cYAML **show_rc,
484 struct cYAML **err_rc);
487 * lustre_lnet_config_max_intf
488 * Sets the maximum number of interfaces per node. this tunable is
489 * primarily useful for sanity checks prior to allocating memory.
491 * max - maximum value to configure
492 * seq_no - sequence number of the request
493 * err_rc - [OUT] struct cYAML tree describing the error. Freed by
496 int lustre_lnet_config_max_intf(int max, int seq_no, struct cYAML **err_rc);
499 * lustre_lnet_show_max_intf
500 * show current maximum interface setting
502 * seq_no - sequence number of the request
503 * show_rc - [OUT] struct cYAML tree containing NUMA range info
504 * err_rc - [OUT] struct cYAML tree describing the error. Freed by
507 int lustre_lnet_show_max_intf(int seq_no, struct cYAML **show_rc,
508 struct cYAML **err_rc);
511 * lustre_lnet_calc_service_id
512 * Calculate the lustre service id to be used for qos
514 int lustre_lnet_calc_service_id(__u64 *service_id);
517 * lustre_lnet_config_discovery
518 * Enable or disable peer discovery. Peer discovery is enabled by default.
520 * enable - non-0 enables, 0 disables
521 * seq_no - sequence number of the request
522 * err_rc - [OUT] struct cYAML tree describing the error. Freed by
525 int lustre_lnet_config_discovery(int enable, int seq_no, struct cYAML **err_rc);
528 * lustre_lnet_show_discovery
529 * show current peer discovery setting
531 * seq_no - sequence number of the request
532 * show_rc - [OUT] struct cYAML tree containing NUMA range info
533 * err_rc - [OUT] struct cYAML tree describing the error. Freed by
536 int lustre_lnet_show_discovery(int seq_no, struct cYAML **show_rc,
537 struct cYAML **err_rc);
540 * lustre_lnet_config_drop_asym_route
541 * Drop or accept asymmetrical route messages. Accept by default.
543 * drop - non-0 drops, 0 accepts
544 * seq_no - sequence number of the request
545 * err_rc - [OUT] struct cYAML tree describing the error. Freed by
548 int lustre_lnet_config_drop_asym_route(int drop, int seq_no,
549 struct cYAML **err_rc);
552 * lustre_lnet_show_drop_asym_route
553 * show current drop asym route setting
555 * seq_no - sequence number of the request
556 * show_rc - [OUT] struct cYAML tree containing NUMA range info
557 * err_rc - [OUT] struct cYAML tree describing the error. Freed by
560 int lustre_lnet_show_drop_asym_route(int seq_no, struct cYAML **show_rc,
561 struct cYAML **err_rc);
564 * lustre_lnet_config_buffers
565 * Send down an IOCTL to configure routing buffer sizes. A value of 0 means
566 * default that particular buffer to default size. A value of -1 means
567 * leave the value of the buffer un changed.
569 * tiny - tiny buffers
570 * small - small buffers
571 * large - large buffers.
572 * seq_no - sequence number of the request
573 * err_rc - [OUT] struct cYAML tree describing the error. Freed by caller
575 int lustre_lnet_config_buffers(int tiny, int small, int large,
576 int seq_no, struct cYAML **err_rc);
579 * lustre_lnet_show_routing
580 * Send down an IOCTL to dump buffers and routing status
581 * This function is used to dump buffers for all CPU partitions.
583 * seq_no - sequence number of the request
584 * show_rc - [OUT] The show output in YAML. Must be freed by caller.
585 * err_rc - [OUT] struct cYAML tree describing the error. Freed by caller
586 * backup - true to output only what's necessary for reconfiguring
589 int lustre_lnet_show_routing(int seq_no, struct cYAML **show_rc,
590 struct cYAML **err_rc, bool backup);
593 * lustre_lnet_show_stats
594 * Shows internal LNET statistics. This is useful to display the
595 * current LNET activity, such as number of messages route, etc
597 * seq_no - sequence number of the command
598 * show_rc - YAML structure of the resultant show
599 * err_rc - YAML strucutre of the resultant return code.
601 int lustre_lnet_show_stats(int seq_no, struct cYAML **show_rc,
602 struct cYAML **err_rc);
605 * lustre_lnet_modify_peer
606 * Handle a peer config or delete operation.
609 * Add a peer NID to a peer with primary NID pnid.
610 * If the provided primary NID is unique, then a new peer is
611 * created with this primary NID, and the NIDs in the NID list are added as
612 * secondary NIDs to this new peer.
613 * If any of the NIDs in the NID list are not unique then the operation
614 * fails. Some peer NIDs might have already been added. It's the responsibility
615 * of the caller of this API to remove the added NIDs if so desired.
618 * Delete the NIDs given in the NID list from the peer with the primary NID
619 * pnid. If pnid is NULL, or it doesn't identify a peer, the operation fails,
620 * and no change happens to the system.
621 * The operation is aborted on the first NID that fails to be deleted.
623 * prim_nid - The desired primary NID of a new peer, or the primary NID of
625 * nids - a comma separated string of nids
626 * is_mr - Specifies whether this peer is MR capable.
627 * cmd - CONFIG or DELETE
628 * seq_no - sequence number of the command
629 * err_rc - YAML structure of the resultant return code
631 int lustre_lnet_modify_peer(char *prim_nid, char *nids, bool is_mr,
632 int cmd, int seq_no, struct cYAML **err_rc);
635 * lustre_lnet_show_peer
636 * Show the peer identified by nid, knid. If knid is NULL all
637 * peers in the system are shown.
639 * knid - A NID of the peer
640 * detail - display detailed information
641 * seq_no - sequence number of the command
642 * show_rc - YAML structure of the resultant show
643 * err_rc - YAML strucutre of the resultant return code.
644 * backup - true to output only what's necessary for reconfiguring
648 int lustre_lnet_show_peer(char *knid, int detail, int seq_no,
649 struct cYAML **show_rc, struct cYAML **err_rc,
653 * lustre_lnet_list_peer
654 * List the known peers.
656 * seq_no - sequence number of the command
657 * show_rc - YAML structure of the resultant show
658 * err_rc - YAML strucutre of the resultant return code.
661 int lustre_lnet_list_peer(int seq_no,
662 struct cYAML **show_rc, struct cYAML **err_rc);
664 /* lustre_lnet_ping_nid
665 * Ping the nid list, pnids.
667 * pnids - NID list to ping.
668 * timeout - timeout(seconds) for ping.
669 * seq_no - sequence number of the command.
670 * show_rc - YAML structure of the resultant show.
671 * err_rc - YAML strucutre of the resultant return code.
674 int lustre_lnet_ping_nid(char *pnid, int timeout, int seq_no,
675 struct cYAML **show_rc, struct cYAML **err_rc);
677 /* lustre_lnet_discover_nid
678 * Discover the nid list, pnids.
680 * pnids - NID list to discover.
681 * force - force discovery.
682 * seq_no - sequence number of the command.
683 * show_rc - YAML structure of the resultant show.
684 * err_rc - YAML strucutre of the resultant return code.
687 int lustre_lnet_discover_nid(char *pnid, int force, int seq_no,
688 struct cYAML **show_rc, struct cYAML **err_rc);
692 * Parses the provided YAML file and then calls the specific APIs
693 * to configure the entities identified in the file
696 * err_rc - [OUT] struct cYAML tree describing the error. Freed by caller
698 int lustre_yaml_config(char *f, struct cYAML **err_rc);
702 * Parses the provided YAML file and then calls the specific APIs
703 * to delete the entities identified in the file
706 * err_rc - [OUT] struct cYAML tree describing the error. Freed by caller
708 int lustre_yaml_del(char *f, struct cYAML **err_rc);
712 * Parses the provided YAML file and then calls the specific APIs
713 * to show the entities identified in the file
716 * show_rc - [OUT] The show output in YAML. Must be freed by caller.
717 * err_rc - [OUT] struct cYAML tree describing the error. Freed by caller
719 int lustre_yaml_show(char *f, struct cYAML **show_rc,
720 struct cYAML **err_rc);
724 * Parses the provided YAML file and then calls the specific APIs
725 * to execute the entities identified in the file
728 * show_rc - [OUT] The show output in YAML. Must be freed by caller.
729 * err_rc - [OUT] struct cYAML tree describing the error. Freed by caller
731 int lustre_yaml_exec(char *f, struct cYAML **show_rc,
732 struct cYAML **err_rc);
735 * yaml_emitter_set_output_netlink
737 * Special handling to integrate LNet handling into libyaml.
738 * This function sets up the ability to take the data stored in @emitter
739 * and formats into a netlink packet to send to the kernel.
741 * emitter - YAML emitter containing what the user specified
742 * nl - Netlink socket to be used by libyaml
743 * family - Netlink family
744 * version - notify kernel what version user land supports
745 * cmd - Netlink command to execute
746 * flags - Netlink flags
748 int yaml_emitter_set_output_netlink(yaml_emitter_t *emitter, struct nl_sock *nl,
749 char *family, int version, int cmd,
753 * yaml_parser_set_input_netlink
755 * Special handling to LNet handling into libyaml.
756 * This function sets up the ability to receive the Netlink data
757 * from the Linux kernel. That data is formated into a YAML document.
759 * parser - YAML parser that is used to present the data received
760 * from the kernel in Netlink format.
761 * nl - should be the Netlink socket receiving data from
763 * stream - Handle the case of continuous data coming in.
765 int yaml_parser_set_input_netlink(yaml_parser_t *parser, struct nl_sock *nl,
769 * yaml_parser_get_reader_error
771 * By default libyaml reports a generic write error. We need a way
772 * to report better parser errors so we can track down problems.
774 * parser - YAML parser that has reported an error.
776 const char *yaml_parser_get_reader_error(yaml_parser_t *parser);
779 * yaml_parser_log_error
781 * Helper function to report the parser error to @log.
783 * parser - YAML parser that has reported an error.
784 * log - file descriptor to write the error message out to.
785 * errmsg - Special extra string to append to error message.
787 void yaml_parser_log_error(yaml_parser_t *parser, FILE *log,
791 * yaml_emitter_log_error
793 * Helper function to report the emitter error to @log.
795 * emitter - YAML emitter that has reported an error.
796 * log - file descriptor to write the error message out to.
798 void yaml_emitter_log_error(yaml_emitter_t *emitter, FILE *log);
802 * lustre_lnet_init_nw_descr
803 * initialize the network descriptor structure for use
805 void lustre_lnet_init_nw_descr(struct lnet_dlc_network_descr *nw_descr);
808 * lustre_lnet_parse_interfaces
809 * prase an interface string and populate descriptor structures
810 * intf_str - interface string of the format
811 * <intf>[<expr>], <intf>[<expr>],..
812 * nw_descr - network descriptor to populate
813 * init - True to initialize nw_descr
815 int lustre_lnet_parse_interfaces(char *intf_str,
816 struct lnet_dlc_network_descr *nw_descr);
819 * lustre_lnet_parse_nidstr
820 * This is a small wrapper around cfs_parse_nidlist.
821 * nidstr - A string parseable by cfs_parse_nidlist
822 * lnet_nidlist - An array of lnet_nid_t to hold the nids specified
824 * max_nids - Size of the lnet_nidlist array, and the maximum number of
825 * nids that can be expressed by the nidstring. If the
826 * nidstring expands to a larger number of nids than max_nids
827 * then an error is returned.
828 * err_str - char pointer where we store an informative error
829 * message when an error is encountered
831 * The number (> 0) of lnet_nid_t stored in the supplied array, or
832 * LUSTRE_CFG_RC_BAD_PARAM if:
834 * - nidstr contains an asterisk. This character is not allowed
835 * because it would cause the size of the expanded nidlist to exceed
836 * the maximum number of nids that is supported by expected callers
838 * - cfs_parse_nidlist fails to parse the nidstring
839 * - The nidlist populated by cfs_parse_nidlist is empty
840 * - The nidstring expands to a larger number of nids than max_nids
841 * - The nidstring expands to zero nids
842 * LUSTRE_CFG_RC_OUT_OF_MEM if:
843 * - cfs_expand_nidlist can return ENOMEM. We return out of mem in
846 int lustre_lnet_parse_nidstr(char *nidstr, lnet_nid_t *lnet_nidlist,
847 int max_nids, char *err_str);
849 /* lustre_lnet_add_udsp
850 * Add a selection policy.
851 * src - source NID descriptor
852 * dst - destination NID descriptor
853 * rte - router NID descriptor
855 * action - union of the action
856 * idx - the index to delete
857 * seq_no - sequence number of the request
858 * err_rc - [OUT] struct cYAML tree describing the error. Freed by
861 int lustre_lnet_add_udsp(char *src, char *dst, char *rte, char *type,
862 union lnet_udsp_action *action, int idx,
863 int seq_no, struct cYAML **err_rc);
865 /* lustre_lnet_del_udsp
866 * Delete a net selection policy.
867 * idx - the index to delete
868 * seq_no - sequence number of the request
869 * err_rc - [OUT] struct cYAML tree describing the error. Freed by
872 int lustre_lnet_del_udsp(unsigned int idx, int seq_no, struct cYAML **err_rc);
874 /* lustre_lnet_show_udsp
875 * show selection policy.
876 * idx - the index to show. -1 to show all policies
877 * seq_no - sequence number of the request
878 * err_rc - [IN/OUT] struct cYAML tree containing udsp info
879 * err_rc - [OUT] struct cYAML tree describing the error. Freed by
882 int lustre_lnet_show_udsp(int idx, int seq_no, struct cYAML **show_rc,
883 struct cYAML **err_rc);
885 #endif /* LIB_LNET_CONFIG_API_H */