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9b39405f CF |
1 | /* |
2 | * IS-IS Rout(e)ing protocol - LSP TX Queuing logic | |
3 | * | |
4 | * Copyright (C) 2018 Christian Franke | |
5 | * | |
6 | * This file is part of FreeRangeRouting (FRR) | |
7 | * | |
8 | * FRR is free software; you can redistribute it and/or modify it | |
9 | * under the terms of the GNU General Public License as published by the | |
10 | * Free Software Foundation; either version 2, or (at your option) any | |
11 | * later version. | |
12 | * | |
13 | * FRR is distributed in the hope that it will be useful, but | |
14 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | * General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License along | |
19 | * with this program; see the file COPYING; if not, write to the Free Software | |
20 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
21 | */ | |
22 | #include <zebra.h> | |
23 | ||
24 | #include "hash.h" | |
25 | #include "jhash.h" | |
26 | ||
27 | #include "isisd/isisd.h" | |
28 | #include "isisd/isis_memory.h" | |
29 | #include "isisd/isis_flags.h" | |
30 | #include "dict.h" | |
31 | #include "isisd/isis_circuit.h" | |
32 | #include "isisd/isis_lsp.h" | |
161fa356 | 33 | #include "isisd/isis_misc.h" |
9b39405f CF |
34 | #include "isisd/isis_tx_queue.h" |
35 | ||
36 | DEFINE_MTYPE_STATIC(ISISD, TX_QUEUE, "ISIS TX Queue") | |
37 | DEFINE_MTYPE_STATIC(ISISD, TX_QUEUE_ENTRY, "ISIS TX Queue Entry") | |
38 | ||
39 | struct isis_tx_queue { | |
161fa356 CF |
40 | struct isis_circuit *circuit; |
41 | void (*send_event)(struct isis_circuit *circuit, | |
42 | struct isis_lsp *, enum isis_tx_type); | |
9b39405f CF |
43 | struct hash *hash; |
44 | }; | |
45 | ||
46 | struct isis_tx_queue_entry { | |
47 | struct isis_lsp *lsp; | |
48 | enum isis_tx_type type; | |
86d6f80d | 49 | bool is_retry; |
9b39405f CF |
50 | struct thread *retry; |
51 | struct isis_tx_queue *queue; | |
52 | }; | |
53 | ||
54 | static unsigned tx_queue_hash_key(void *p) | |
55 | { | |
56 | struct isis_tx_queue_entry *e = p; | |
57 | ||
58 | uint32_t id_key = jhash(e->lsp->hdr.lsp_id, | |
59 | ISIS_SYS_ID_LEN + 2, 0x55aa5a5a); | |
60 | ||
61 | return jhash_1word(e->lsp->level, id_key); | |
62 | } | |
63 | ||
74df8d6d | 64 | static bool tx_queue_hash_cmp(const void *a, const void *b) |
9b39405f CF |
65 | { |
66 | const struct isis_tx_queue_entry *ea = a, *eb = b; | |
67 | ||
68 | if (ea->lsp->level != eb->lsp->level) | |
74df8d6d | 69 | return false; |
9b39405f CF |
70 | |
71 | if (memcmp(ea->lsp->hdr.lsp_id, eb->lsp->hdr.lsp_id, | |
72 | ISIS_SYS_ID_LEN + 2)) | |
74df8d6d | 73 | return false; |
9b39405f | 74 | |
74df8d6d | 75 | return true; |
9b39405f CF |
76 | } |
77 | ||
161fa356 CF |
78 | struct isis_tx_queue *isis_tx_queue_new( |
79 | struct isis_circuit *circuit, | |
80 | void(*send_event)(struct isis_circuit *circuit, | |
81 | struct isis_lsp *, | |
82 | enum isis_tx_type)) | |
9b39405f CF |
83 | { |
84 | struct isis_tx_queue *rv = XCALLOC(MTYPE_TX_QUEUE, sizeof(*rv)); | |
85 | ||
161fa356 | 86 | rv->circuit = circuit; |
9b39405f CF |
87 | rv->send_event = send_event; |
88 | ||
89 | rv->hash = hash_create(tx_queue_hash_key, tx_queue_hash_cmp, NULL); | |
90 | return rv; | |
91 | } | |
92 | ||
93 | static void tx_queue_element_free(void *element) | |
94 | { | |
95 | struct isis_tx_queue_entry *e = element; | |
96 | ||
97 | if (e->retry) | |
98 | thread_cancel(e->retry); | |
99 | ||
100 | XFREE(MTYPE_TX_QUEUE_ENTRY, e); | |
101 | } | |
102 | ||
103 | void isis_tx_queue_free(struct isis_tx_queue *queue) | |
104 | { | |
105 | hash_clean(queue->hash, tx_queue_element_free); | |
106 | hash_free(queue->hash); | |
107 | XFREE(MTYPE_TX_QUEUE, queue); | |
108 | } | |
109 | ||
110 | static struct isis_tx_queue_entry *tx_queue_find(struct isis_tx_queue *queue, | |
111 | struct isis_lsp *lsp) | |
112 | { | |
113 | struct isis_tx_queue_entry e = { | |
114 | .lsp = lsp | |
115 | }; | |
116 | ||
117 | return hash_lookup(queue->hash, &e); | |
118 | } | |
119 | ||
120 | static int tx_queue_send_event(struct thread *thread) | |
121 | { | |
122 | struct isis_tx_queue_entry *e = THREAD_ARG(thread); | |
123 | struct isis_tx_queue *queue = e->queue; | |
124 | ||
125 | e->retry = NULL; | |
126 | thread_add_timer(master, tx_queue_send_event, e, 5, &e->retry); | |
127 | ||
89cdc4df | 128 | if (e->is_retry) |
86d6f80d | 129 | queue->circuit->area->lsp_rxmt_count++; |
89cdc4df | 130 | else |
86d6f80d | 131 | e->is_retry = true; |
89cdc4df | 132 | |
161fa356 | 133 | queue->send_event(queue->circuit, e->lsp, e->type); |
9b39405f CF |
134 | /* Don't access e here anymore, send_event might have destroyed it */ |
135 | ||
136 | return 0; | |
137 | } | |
138 | ||
161fa356 CF |
139 | void _isis_tx_queue_add(struct isis_tx_queue *queue, |
140 | struct isis_lsp *lsp, | |
141 | enum isis_tx_type type, | |
142 | const char *func, const char *file, | |
143 | int line) | |
9b39405f CF |
144 | { |
145 | if (!queue) | |
146 | return; | |
147 | ||
161fa356 CF |
148 | if (isis->debugs & DEBUG_TX_QUEUE) { |
149 | zlog_debug("Add LSP %s to %s queue as %s LSP. (From %s %s:%d)", | |
150 | rawlspid_print(lsp->hdr.lsp_id), | |
151 | queue->circuit->interface->name, | |
152 | (type == TX_LSP_CIRCUIT_SCOPED) ? | |
153 | "circuit scoped" : "regular", | |
154 | func, file, line); | |
155 | } | |
156 | ||
9b39405f CF |
157 | struct isis_tx_queue_entry *e = tx_queue_find(queue, lsp); |
158 | if (!e) { | |
159 | e = XCALLOC(MTYPE_TX_QUEUE_ENTRY, sizeof(*e)); | |
160 | e->lsp = lsp; | |
161 | e->queue = queue; | |
162 | ||
163 | struct isis_tx_queue_entry *inserted; | |
164 | inserted = hash_get(queue->hash, e, hash_alloc_intern); | |
165 | assert(inserted == e); | |
166 | } | |
167 | ||
168 | e->type = type; | |
169 | ||
170 | if (e->retry) | |
171 | thread_cancel(e->retry); | |
172 | thread_add_event(master, tx_queue_send_event, e, 0, &e->retry); | |
86d6f80d CF |
173 | |
174 | e->is_retry = false; | |
9b39405f CF |
175 | } |
176 | ||
161fa356 CF |
177 | void _isis_tx_queue_del(struct isis_tx_queue *queue, struct isis_lsp *lsp, |
178 | const char *func, const char *file, int line) | |
9b39405f CF |
179 | { |
180 | if (!queue) | |
181 | return; | |
182 | ||
183 | struct isis_tx_queue_entry *e = tx_queue_find(queue, lsp); | |
184 | if (!e) | |
185 | return; | |
186 | ||
161fa356 CF |
187 | if (isis->debugs & DEBUG_TX_QUEUE) { |
188 | zlog_debug("Remove LSP %s from %s queue. (From %s %s:%d)", | |
189 | rawlspid_print(lsp->hdr.lsp_id), | |
190 | queue->circuit->interface->name, | |
191 | func, file, line); | |
192 | } | |
193 | ||
9b39405f CF |
194 | if (e->retry) |
195 | thread_cancel(e->retry); | |
196 | ||
197 | hash_release(queue->hash, e); | |
198 | XFREE(MTYPE_TX_QUEUE_ENTRY, e); | |
199 | } | |
200 | ||
201 | unsigned long isis_tx_queue_len(struct isis_tx_queue *queue) | |
202 | { | |
203 | if (!queue) | |
204 | return 0; | |
205 | ||
206 | return hashcount(queue->hash); | |
207 | } | |
208 | ||
209 | void isis_tx_queue_clean(struct isis_tx_queue *queue) | |
210 | { | |
211 | hash_clean(queue->hash, tx_queue_element_free); | |
212 | } |