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 General Public License version 2 only,
8 * as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License version 2 for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; If not, see
17 * http://www.gnu.org/licenses/gpl-2.0.html
22 * Copyright (C) 2013 DataDirect Networks, Inc.
24 * Copyright (c) 2014, Intel Corporation.
28 * Network Request Scheduler (NRS) Token Bucket Filter(TBF) policy
32 #ifndef _LUSTRE_NRS_TBF_H
33 #define _LUSTRE_NRS_TBF_H
45 struct nrs_tbf_jobid {
47 struct list_head tj_linkage;
50 struct nrs_tbf_client {
51 /** Resource object for policy instance. */
52 struct ptlrpc_nrs_resource tc_res;
53 /** Node in the hash table. */
54 struct hlist_node tc_hnode;
55 /** NID of the client. */
57 /** Jobid of the client. */
58 char tc_jobid[LUSTRE_JOBID_SIZE];
59 /** Reference number of the client. */
61 /** Likage to rule. */
62 struct list_head tc_linkage;
63 /** Pointer to rule. */
64 struct nrs_tbf_rule *tc_rule;
65 /** Generation of the rule matched. */
66 __u64 tc_rule_generation;
67 /** Limit of RPC rate. */
69 /** Time to wait for next token. */
71 /** RPC token number. */
73 /** Token bucket depth. */
75 /** Time check-point. */
77 /** List of queued requests. */
78 struct list_head tc_list;
79 /** Node in binary heap. */
80 cfs_binheap_node_t tc_node;
81 /** Whether the client is in heap. */
83 /** Sequence of the newest rule. */
84 __u32 tc_rule_sequence;
86 * Linkage into LRU list. Protected bucket lock of
87 * nrs_tbf_head::th_cli_hash.
89 struct list_head tc_lru;
92 #define MAX_TBF_NAME (16)
94 #define NTRS_STOPPING 0x0000001
95 #define NTRS_DEFAULT 0x0000002
98 /** Name of the rule. */
99 char tr_name[MAX_TBF_NAME];
100 /** Head belongs to. */
101 struct nrs_tbf_head *tr_head;
102 /** Likage to head. */
103 struct list_head tr_linkage;
104 /** Nid list of the rule. */
105 struct list_head tr_nids;
106 /** Nid list string of the rule.*/
108 /** Jobid list of the rule. */
109 struct list_head tr_jobids;
110 /** Jobid list string of the rule.*/
114 /** Time to wait for next token. */
116 /** Token bucket depth. */
118 /** List of client. */
119 struct list_head tr_cli_list;
120 /** Flags of the rule. */
122 /** Usage Reference count taken on the rule. */
124 /** Generation of the rule. */
130 int (*o_startup)(struct ptlrpc_nrs_policy *, struct nrs_tbf_head *);
131 struct nrs_tbf_client *(*o_cli_find)(struct nrs_tbf_head *,
132 struct ptlrpc_request *);
133 struct nrs_tbf_client *(*o_cli_findadd)(struct nrs_tbf_head *,
134 struct nrs_tbf_client *);
135 void (*o_cli_put)(struct nrs_tbf_head *, struct nrs_tbf_client *);
136 void (*o_cli_init)(struct nrs_tbf_client *, struct ptlrpc_request *);
137 int (*o_rule_init)(struct ptlrpc_nrs_policy *,
138 struct nrs_tbf_rule *,
139 struct nrs_tbf_cmd *);
140 int (*o_rule_dump)(struct nrs_tbf_rule *, struct seq_file *);
141 int (*o_rule_match)(struct nrs_tbf_rule *,
142 struct nrs_tbf_client *);
143 void (*o_rule_fini)(struct nrs_tbf_rule *);
146 #define NRS_TBF_TYPE_JOBID "jobid"
147 #define NRS_TBF_TYPE_NID "nid"
148 #define NRS_TBF_TYPE_MAX_LEN 20
149 #define NRS_TBF_FLAG_JOBID 0x0000001
150 #define NRS_TBF_FLAG_NID 0x0000002
152 struct nrs_tbf_bucket {
154 * LRU list, updated on each access to client. Protected by
155 * bucket lock of nrs_tbf_head::th_cli_hash.
157 struct list_head ntb_lru;
161 * Private data structure for the TBF policy
163 struct nrs_tbf_head {
165 * Resource object for policy instance.
167 struct ptlrpc_nrs_resource th_res;
171 struct list_head th_list;
173 * Lock to protect the list of rules.
175 spinlock_t th_rule_lock;
177 * Generation of rules.
179 atomic_t th_rule_sequence;
183 struct nrs_tbf_rule *th_rule;
185 * Timer for next token.
187 struct hrtimer th_timer;
189 * Deadline of the timer.
193 * Sequence of requests.
199 cfs_binheap_t *th_binheap;
203 struct cfs_hash *th_cli_hash;
205 * Type of TBF policy.
207 char th_type[NRS_TBF_TYPE_MAX_LEN + 1];
211 struct nrs_tbf_ops *th_ops;
217 * Index of bucket on hash table while purging.
222 enum nrs_tbf_cmd_type {
223 NRS_CTL_TBF_START_RULE = 0,
224 NRS_CTL_TBF_STOP_RULE,
225 NRS_CTL_TBF_CHANGE_RATE,
229 enum nrs_tbf_cmd_type tc_cmd;
232 struct list_head tc_nids;
234 struct list_head tc_jobids;
236 __u32 tc_valid_types;
244 struct list_head tr_list;
246 * Sequence of the request.
252 * TBF policy operations.
256 * Read the the data of a TBF policy.
258 NRS_CTL_TBF_RD_RULE = PTLRPC_NRS_CTL_1ST_POL_SPEC,
260 * Write the the data of a TBF policy.