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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 | * | |
8678d638 | 6 | * This file is part of FRRouting (FRR) |
9b39405f CF |
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" | |
9b39405f CF |
30 | #include "isisd/isis_circuit.h" |
31 | #include "isisd/isis_lsp.h" | |
161fa356 | 32 | #include "isisd/isis_misc.h" |
9b39405f CF |
33 | #include "isisd/isis_tx_queue.h" |
34 | ||
35 | DEFINE_MTYPE_STATIC(ISISD, TX_QUEUE, "ISIS TX Queue") | |
36 | DEFINE_MTYPE_STATIC(ISISD, TX_QUEUE_ENTRY, "ISIS TX Queue Entry") | |
37 | ||
38 | struct isis_tx_queue { | |
161fa356 CF |
39 | struct isis_circuit *circuit; |
40 | void (*send_event)(struct isis_circuit *circuit, | |
41 | struct isis_lsp *, enum isis_tx_type); | |
9b39405f CF |
42 | struct hash *hash; |
43 | }; | |
44 | ||
45 | struct isis_tx_queue_entry { | |
46 | struct isis_lsp *lsp; | |
47 | enum isis_tx_type type; | |
86d6f80d | 48 | bool is_retry; |
9b39405f CF |
49 | struct thread *retry; |
50 | struct isis_tx_queue *queue; | |
51 | }; | |
52 | ||
d8b87afe | 53 | static unsigned tx_queue_hash_key(const void *p) |
9b39405f | 54 | { |
d8b87afe | 55 | const struct isis_tx_queue_entry *e = p; |
9b39405f CF |
56 | |
57 | uint32_t id_key = jhash(e->lsp->hdr.lsp_id, | |
58 | ISIS_SYS_ID_LEN + 2, 0x55aa5a5a); | |
59 | ||
60 | return jhash_1word(e->lsp->level, id_key); | |
61 | } | |
62 | ||
74df8d6d | 63 | static bool tx_queue_hash_cmp(const void *a, const void *b) |
9b39405f CF |
64 | { |
65 | const struct isis_tx_queue_entry *ea = a, *eb = b; | |
66 | ||
67 | if (ea->lsp->level != eb->lsp->level) | |
74df8d6d | 68 | return false; |
9b39405f CF |
69 | |
70 | if (memcmp(ea->lsp->hdr.lsp_id, eb->lsp->hdr.lsp_id, | |
71 | ISIS_SYS_ID_LEN + 2)) | |
74df8d6d | 72 | return false; |
9b39405f | 73 | |
74df8d6d | 74 | return true; |
9b39405f CF |
75 | } |
76 | ||
161fa356 CF |
77 | struct isis_tx_queue *isis_tx_queue_new( |
78 | struct isis_circuit *circuit, | |
79 | void(*send_event)(struct isis_circuit *circuit, | |
80 | struct isis_lsp *, | |
81 | enum isis_tx_type)) | |
9b39405f CF |
82 | { |
83 | struct isis_tx_queue *rv = XCALLOC(MTYPE_TX_QUEUE, sizeof(*rv)); | |
84 | ||
161fa356 | 85 | rv->circuit = circuit; |
9b39405f CF |
86 | rv->send_event = send_event; |
87 | ||
88 | rv->hash = hash_create(tx_queue_hash_key, tx_queue_hash_cmp, NULL); | |
89 | return rv; | |
90 | } | |
91 | ||
92 | static void tx_queue_element_free(void *element) | |
93 | { | |
94 | struct isis_tx_queue_entry *e = element; | |
95 | ||
96 | if (e->retry) | |
97 | thread_cancel(e->retry); | |
98 | ||
99 | XFREE(MTYPE_TX_QUEUE_ENTRY, e); | |
100 | } | |
101 | ||
102 | void isis_tx_queue_free(struct isis_tx_queue *queue) | |
103 | { | |
104 | hash_clean(queue->hash, tx_queue_element_free); | |
105 | hash_free(queue->hash); | |
106 | XFREE(MTYPE_TX_QUEUE, queue); | |
107 | } | |
108 | ||
109 | static struct isis_tx_queue_entry *tx_queue_find(struct isis_tx_queue *queue, | |
110 | struct isis_lsp *lsp) | |
111 | { | |
112 | struct isis_tx_queue_entry e = { | |
113 | .lsp = lsp | |
114 | }; | |
115 | ||
116 | return hash_lookup(queue->hash, &e); | |
117 | } | |
118 | ||
119 | static int tx_queue_send_event(struct thread *thread) | |
120 | { | |
121 | struct isis_tx_queue_entry *e = THREAD_ARG(thread); | |
122 | struct isis_tx_queue *queue = e->queue; | |
123 | ||
124 | e->retry = NULL; | |
125 | thread_add_timer(master, tx_queue_send_event, e, 5, &e->retry); | |
126 | ||
89cdc4df | 127 | if (e->is_retry) |
86d6f80d | 128 | queue->circuit->area->lsp_rxmt_count++; |
89cdc4df | 129 | else |
86d6f80d | 130 | e->is_retry = true; |
89cdc4df | 131 | |
161fa356 | 132 | queue->send_event(queue->circuit, e->lsp, e->type); |
9b39405f CF |
133 | /* Don't access e here anymore, send_event might have destroyed it */ |
134 | ||
135 | return 0; | |
136 | } | |
137 | ||
161fa356 CF |
138 | void _isis_tx_queue_add(struct isis_tx_queue *queue, |
139 | struct isis_lsp *lsp, | |
140 | enum isis_tx_type type, | |
141 | const char *func, const char *file, | |
142 | int line) | |
9b39405f CF |
143 | { |
144 | if (!queue) | |
145 | return; | |
146 | ||
e740f9c1 | 147 | if (IS_DEBUG_TX_QUEUE) { |
161fa356 CF |
148 | zlog_debug("Add LSP %s to %s queue as %s LSP. (From %s %s:%d)", |
149 | rawlspid_print(lsp->hdr.lsp_id), | |
150 | queue->circuit->interface->name, | |
151 | (type == TX_LSP_CIRCUIT_SCOPED) ? | |
152 | "circuit scoped" : "regular", | |
153 | func, file, line); | |
154 | } | |
155 | ||
9b39405f CF |
156 | struct isis_tx_queue_entry *e = tx_queue_find(queue, lsp); |
157 | if (!e) { | |
158 | e = XCALLOC(MTYPE_TX_QUEUE_ENTRY, sizeof(*e)); | |
159 | e->lsp = lsp; | |
160 | e->queue = queue; | |
161 | ||
162 | struct isis_tx_queue_entry *inserted; | |
163 | inserted = hash_get(queue->hash, e, hash_alloc_intern); | |
164 | assert(inserted == e); | |
165 | } | |
166 | ||
167 | e->type = type; | |
168 | ||
169 | if (e->retry) | |
170 | thread_cancel(e->retry); | |
171 | thread_add_event(master, tx_queue_send_event, e, 0, &e->retry); | |
86d6f80d CF |
172 | |
173 | e->is_retry = false; | |
9b39405f CF |
174 | } |
175 | ||
161fa356 CF |
176 | void _isis_tx_queue_del(struct isis_tx_queue *queue, struct isis_lsp *lsp, |
177 | const char *func, const char *file, int line) | |
9b39405f CF |
178 | { |
179 | if (!queue) | |
180 | return; | |
181 | ||
182 | struct isis_tx_queue_entry *e = tx_queue_find(queue, lsp); | |
183 | if (!e) | |
184 | return; | |
185 | ||
e740f9c1 | 186 | if (IS_DEBUG_TX_QUEUE) { |
161fa356 CF |
187 | zlog_debug("Remove LSP %s from %s queue. (From %s %s:%d)", |
188 | rawlspid_print(lsp->hdr.lsp_id), | |
189 | queue->circuit->interface->name, | |
190 | func, file, line); | |
191 | } | |
192 | ||
9b39405f CF |
193 | if (e->retry) |
194 | thread_cancel(e->retry); | |
195 | ||
196 | hash_release(queue->hash, e); | |
197 | XFREE(MTYPE_TX_QUEUE_ENTRY, e); | |
198 | } | |
199 | ||
200 | unsigned long isis_tx_queue_len(struct isis_tx_queue *queue) | |
201 | { | |
202 | if (!queue) | |
203 | return 0; | |
204 | ||
205 | return hashcount(queue->hash); | |
206 | } | |
207 | ||
208 | void isis_tx_queue_clean(struct isis_tx_queue *queue) | |
209 | { | |
210 | hash_clean(queue->hash, tx_queue_element_free); | |
211 | } |