Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1 | /* |
| 2 | * net/tipc/bcast.c: TIPC broadcast code |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 3 | * |
Per Liden | 593a5f2 | 2006-01-11 19:14:19 +0100 | [diff] [blame] | 4 | * Copyright (c) 2004-2006, Ericsson AB |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 5 | * Copyright (c) 2004, Intel Corporation. |
| 6 | * Copyright (c) 2005, Wind River Systems |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 7 | * All rights reserved. |
| 8 | * |
Per Liden | 9ea1fd3 | 2006-01-11 13:30:43 +0100 | [diff] [blame] | 9 | * Redistribution and use in source and binary forms, with or without |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 10 | * modification, are permitted provided that the following conditions are met: |
| 11 | * |
Per Liden | 9ea1fd3 | 2006-01-11 13:30:43 +0100 | [diff] [blame] | 12 | * 1. Redistributions of source code must retain the above copyright |
| 13 | * notice, this list of conditions and the following disclaimer. |
| 14 | * 2. Redistributions in binary form must reproduce the above copyright |
| 15 | * notice, this list of conditions and the following disclaimer in the |
| 16 | * documentation and/or other materials provided with the distribution. |
| 17 | * 3. Neither the names of the copyright holders nor the names of its |
| 18 | * contributors may be used to endorse or promote products derived from |
| 19 | * this software without specific prior written permission. |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 20 | * |
Per Liden | 9ea1fd3 | 2006-01-11 13:30:43 +0100 | [diff] [blame] | 21 | * Alternatively, this software may be distributed under the terms of the |
| 22 | * GNU General Public License ("GPL") version 2 as published by the Free |
| 23 | * Software Foundation. |
| 24 | * |
| 25 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| 26 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 27 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 28 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
| 29 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 30 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 31 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| 32 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| 33 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 34 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 35 | * POSSIBILITY OF SUCH DAMAGE. |
| 36 | */ |
| 37 | |
| 38 | #include "core.h" |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 39 | #include "link.h" |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 40 | #include "port.h" |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 41 | #include "bcast.h" |
| 42 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 43 | #define MAX_PKT_DEFAULT_MCAST 1500 /* bcast link max packet size (fixed) */ |
| 44 | |
| 45 | #define BCLINK_WIN_DEFAULT 20 /* bcast link window size (default) */ |
| 46 | |
Allan Stephens | d356eeb | 2006-06-25 23:40:01 -0700 | [diff] [blame] | 47 | /* |
| 48 | * Loss rate for incoming broadcast frames; used to test retransmission code. |
| 49 | * Set to N to cause every N'th frame to be discarded; 0 => don't discard any. |
| 50 | */ |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 51 | |
Allan Stephens | d356eeb | 2006-06-25 23:40:01 -0700 | [diff] [blame] | 52 | #define TIPC_BCAST_LOSS_RATE 0 |
| 53 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 54 | /** |
| 55 | * struct bcbearer_pair - a pair of bearers used by broadcast link |
| 56 | * @primary: pointer to primary bearer |
| 57 | * @secondary: pointer to secondary bearer |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 58 | * |
| 59 | * Bearers must have same priority and same set of reachable destinations |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 60 | * to be paired. |
| 61 | */ |
| 62 | |
| 63 | struct bcbearer_pair { |
| 64 | struct bearer *primary; |
| 65 | struct bearer *secondary; |
| 66 | }; |
| 67 | |
| 68 | /** |
| 69 | * struct bcbearer - bearer used by broadcast link |
| 70 | * @bearer: (non-standard) broadcast bearer structure |
| 71 | * @media: (non-standard) broadcast media structure |
| 72 | * @bpairs: array of bearer pairs |
Allan Stephens | 65f51ef | 2006-06-25 23:53:20 -0700 | [diff] [blame] | 73 | * @bpairs_temp: temporary array of bearer pairs used by tipc_bcbearer_sort() |
| 74 | * @remains: temporary node map used by tipc_bcbearer_send() |
| 75 | * @remains_new: temporary node map used tipc_bcbearer_send() |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 76 | * |
Allan Stephens | 65f51ef | 2006-06-25 23:53:20 -0700 | [diff] [blame] | 77 | * Note: The fields labelled "temporary" are incorporated into the bearer |
| 78 | * to avoid consuming potentially limited stack space through the use of |
| 79 | * large local variables within multicast routines. Concurrent access is |
| 80 | * prevented through use of the spinlock "bc_lock". |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 81 | */ |
| 82 | |
| 83 | struct bcbearer { |
| 84 | struct bearer bearer; |
| 85 | struct media media; |
| 86 | struct bcbearer_pair bpairs[MAX_BEARERS]; |
Per Liden | 16cb4b3 | 2006-01-13 22:22:22 +0100 | [diff] [blame] | 87 | struct bcbearer_pair bpairs_temp[TIPC_MAX_LINK_PRI + 1]; |
David S. Miller | 6c00055 | 2008-09-02 23:38:32 -0700 | [diff] [blame] | 88 | struct tipc_node_map remains; |
| 89 | struct tipc_node_map remains_new; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 90 | }; |
| 91 | |
| 92 | /** |
| 93 | * struct bclink - link used for broadcast messages |
| 94 | * @link: (non-standard) broadcast link structure |
| 95 | * @node: (non-standard) node structure representing b'cast link's peer node |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 96 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 97 | * Handles sequence numbering, fragmentation, bundling, etc. |
| 98 | */ |
| 99 | |
| 100 | struct bclink { |
| 101 | struct link link; |
David S. Miller | 6c00055 | 2008-09-02 23:38:32 -0700 | [diff] [blame] | 102 | struct tipc_node node; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 103 | }; |
| 104 | |
| 105 | |
Allan Stephens | e3ec9c7 | 2010-12-31 18:59:34 +0000 | [diff] [blame^] | 106 | static struct bcbearer *bcbearer; |
| 107 | static struct bclink *bclink; |
| 108 | static struct link *bcl; |
Ingo Molnar | 34af946 | 2006-06-27 02:53:55 -0700 | [diff] [blame] | 109 | static DEFINE_SPINLOCK(bc_lock); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 110 | |
Allan Stephens | 8f92df6 | 2010-12-31 18:59:19 +0000 | [diff] [blame] | 111 | /* broadcast-capable node map */ |
| 112 | struct tipc_node_map tipc_bcast_nmap; |
| 113 | |
Allan Stephens | 3aec9cc | 2010-05-11 14:30:07 +0000 | [diff] [blame] | 114 | const char tipc_bclink_name[] = "broadcast-link"; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 115 | |
stephen hemminger | 31e3c3f | 2010-10-13 13:20:35 +0000 | [diff] [blame] | 116 | static void tipc_nmap_diff(struct tipc_node_map *nm_a, |
| 117 | struct tipc_node_map *nm_b, |
| 118 | struct tipc_node_map *nm_diff); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 119 | |
Sam Ravnborg | 05790c6 | 2006-03-20 22:37:04 -0800 | [diff] [blame] | 120 | static u32 buf_seqno(struct sk_buff *buf) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 121 | { |
| 122 | return msg_seqno(buf_msg(buf)); |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 123 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 124 | |
Sam Ravnborg | 05790c6 | 2006-03-20 22:37:04 -0800 | [diff] [blame] | 125 | static u32 bcbuf_acks(struct sk_buff *buf) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 126 | { |
David S. Miller | 880b005 | 2006-01-12 13:22:32 -0800 | [diff] [blame] | 127 | return (u32)(unsigned long)TIPC_SKB_CB(buf)->handle; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 128 | } |
| 129 | |
Sam Ravnborg | 05790c6 | 2006-03-20 22:37:04 -0800 | [diff] [blame] | 130 | static void bcbuf_set_acks(struct sk_buff *buf, u32 acks) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 131 | { |
David S. Miller | 880b005 | 2006-01-12 13:22:32 -0800 | [diff] [blame] | 132 | TIPC_SKB_CB(buf)->handle = (void *)(unsigned long)acks; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 133 | } |
| 134 | |
Sam Ravnborg | 05790c6 | 2006-03-20 22:37:04 -0800 | [diff] [blame] | 135 | static void bcbuf_decr_acks(struct sk_buff *buf) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 136 | { |
| 137 | bcbuf_set_acks(buf, bcbuf_acks(buf) - 1); |
| 138 | } |
| 139 | |
| 140 | |
Allan Stephens | 5b1f7bd | 2010-08-17 11:00:09 +0000 | [diff] [blame] | 141 | static void bclink_set_last_sent(void) |
| 142 | { |
| 143 | if (bcl->next_out) |
| 144 | bcl->fsm_msg_cnt = mod(buf_seqno(bcl->next_out) - 1); |
| 145 | else |
| 146 | bcl->fsm_msg_cnt = mod(bcl->next_out_no - 1); |
| 147 | } |
| 148 | |
| 149 | u32 tipc_bclink_get_last_sent(void) |
| 150 | { |
| 151 | return bcl->fsm_msg_cnt; |
| 152 | } |
| 153 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 154 | /** |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 155 | * bclink_set_gap - set gap according to contents of current deferred pkt queue |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 156 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 157 | * Called with 'node' locked, bc_lock unlocked |
| 158 | */ |
| 159 | |
David S. Miller | 6c00055 | 2008-09-02 23:38:32 -0700 | [diff] [blame] | 160 | static void bclink_set_gap(struct tipc_node *n_ptr) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 161 | { |
| 162 | struct sk_buff *buf = n_ptr->bclink.deferred_head; |
| 163 | |
| 164 | n_ptr->bclink.gap_after = n_ptr->bclink.gap_to = |
| 165 | mod(n_ptr->bclink.last_in); |
| 166 | if (unlikely(buf != NULL)) |
| 167 | n_ptr->bclink.gap_to = mod(buf_seqno(buf) - 1); |
| 168 | } |
| 169 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 170 | /** |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 171 | * bclink_ack_allowed - test if ACK or NACK message can be sent at this moment |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 172 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 173 | * This mechanism endeavours to prevent all nodes in network from trying |
| 174 | * to ACK or NACK at the same time. |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 175 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 176 | * Note: TIPC uses a different trigger to distribute ACKs than it does to |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 177 | * distribute NACKs, but tries to use the same spacing (divide by 16). |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 178 | */ |
| 179 | |
Sam Ravnborg | 05790c6 | 2006-03-20 22:37:04 -0800 | [diff] [blame] | 180 | static int bclink_ack_allowed(u32 n) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 181 | { |
Eric Dumazet | a02cec2 | 2010-09-22 20:43:57 +0000 | [diff] [blame] | 182 | return (n % TIPC_MIN_LINK_WIN) == tipc_own_tag; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 183 | } |
| 184 | |
| 185 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 186 | /** |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 187 | * bclink_retransmit_pkt - retransmit broadcast packets |
| 188 | * @after: sequence number of last packet to *not* retransmit |
| 189 | * @to: sequence number of last packet to retransmit |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 190 | * |
Allan Stephens | d356eeb | 2006-06-25 23:40:01 -0700 | [diff] [blame] | 191 | * Called with bc_lock locked |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 192 | */ |
| 193 | |
| 194 | static void bclink_retransmit_pkt(u32 after, u32 to) |
| 195 | { |
| 196 | struct sk_buff *buf; |
| 197 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 198 | buf = bcl->first_out; |
| 199 | while (buf && less_eq(buf_seqno(buf), after)) { |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 200 | buf = buf->next; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 201 | } |
Allan Stephens | d356eeb | 2006-06-25 23:40:01 -0700 | [diff] [blame] | 202 | tipc_link_retransmit(bcl, buf, mod(to - after)); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 203 | } |
| 204 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 205 | /** |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 206 | * tipc_bclink_acknowledge - handle acknowledgement of broadcast packets |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 207 | * @n_ptr: node that sent acknowledgement info |
| 208 | * @acked: broadcast sequence # that has been acknowledged |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 209 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 210 | * Node is locked, bc_lock unlocked. |
| 211 | */ |
| 212 | |
David S. Miller | 6c00055 | 2008-09-02 23:38:32 -0700 | [diff] [blame] | 213 | void tipc_bclink_acknowledge(struct tipc_node *n_ptr, u32 acked) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 214 | { |
| 215 | struct sk_buff *crs; |
| 216 | struct sk_buff *next; |
| 217 | unsigned int released = 0; |
| 218 | |
| 219 | if (less_eq(acked, n_ptr->bclink.acked)) |
| 220 | return; |
| 221 | |
| 222 | spin_lock_bh(&bc_lock); |
| 223 | |
| 224 | /* Skip over packets that node has previously acknowledged */ |
| 225 | |
| 226 | crs = bcl->first_out; |
| 227 | while (crs && less_eq(buf_seqno(crs), n_ptr->bclink.acked)) { |
| 228 | crs = crs->next; |
| 229 | } |
| 230 | |
| 231 | /* Update packets that node is now acknowledging */ |
| 232 | |
| 233 | while (crs && less_eq(buf_seqno(crs), acked)) { |
| 234 | next = crs->next; |
| 235 | bcbuf_decr_acks(crs); |
| 236 | if (bcbuf_acks(crs) == 0) { |
| 237 | bcl->first_out = next; |
| 238 | bcl->out_queue_size--; |
| 239 | buf_discard(crs); |
| 240 | released = 1; |
| 241 | } |
| 242 | crs = next; |
| 243 | } |
| 244 | n_ptr->bclink.acked = acked; |
| 245 | |
| 246 | /* Try resolving broadcast link congestion, if necessary */ |
| 247 | |
Allan Stephens | 5b1f7bd | 2010-08-17 11:00:09 +0000 | [diff] [blame] | 248 | if (unlikely(bcl->next_out)) { |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 249 | tipc_link_push_queue(bcl); |
Allan Stephens | 5b1f7bd | 2010-08-17 11:00:09 +0000 | [diff] [blame] | 250 | bclink_set_last_sent(); |
| 251 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 252 | if (unlikely(released && !list_empty(&bcl->waiting_ports))) |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 253 | tipc_link_wakeup_ports(bcl, 0); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 254 | spin_unlock_bh(&bc_lock); |
| 255 | } |
| 256 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 257 | /** |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 258 | * bclink_send_ack - unicast an ACK msg |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 259 | * |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 260 | * tipc_net_lock and node lock set |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 261 | */ |
| 262 | |
David S. Miller | 6c00055 | 2008-09-02 23:38:32 -0700 | [diff] [blame] | 263 | static void bclink_send_ack(struct tipc_node *n_ptr) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 264 | { |
| 265 | struct link *l_ptr = n_ptr->active_links[n_ptr->addr & 1]; |
| 266 | |
| 267 | if (l_ptr != NULL) |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 268 | tipc_link_send_proto_msg(l_ptr, STATE_MSG, 0, 0, 0, 0, 0); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 269 | } |
| 270 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 271 | /** |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 272 | * bclink_send_nack- broadcast a NACK msg |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 273 | * |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 274 | * tipc_net_lock and node lock set |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 275 | */ |
| 276 | |
David S. Miller | 6c00055 | 2008-09-02 23:38:32 -0700 | [diff] [blame] | 277 | static void bclink_send_nack(struct tipc_node *n_ptr) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 278 | { |
| 279 | struct sk_buff *buf; |
| 280 | struct tipc_msg *msg; |
| 281 | |
| 282 | if (!less(n_ptr->bclink.gap_after, n_ptr->bclink.gap_to)) |
| 283 | return; |
| 284 | |
stephen hemminger | 31e3c3f | 2010-10-13 13:20:35 +0000 | [diff] [blame] | 285 | buf = tipc_buf_acquire(INT_H_SIZE); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 286 | if (buf) { |
| 287 | msg = buf_msg(buf); |
Allan Stephens | c68ca7b | 2010-05-11 14:30:12 +0000 | [diff] [blame] | 288 | tipc_msg_init(msg, BCAST_PROTOCOL, STATE_MSG, |
Allan Stephens | 7571521 | 2008-06-04 17:37:34 -0700 | [diff] [blame] | 289 | INT_H_SIZE, n_ptr->addr); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 290 | msg_set_mc_netid(msg, tipc_net_id); |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 291 | msg_set_bcast_ack(msg, mod(n_ptr->bclink.last_in)); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 292 | msg_set_bcgap_after(msg, n_ptr->bclink.gap_after); |
| 293 | msg_set_bcgap_to(msg, n_ptr->bclink.gap_to); |
| 294 | msg_set_bcast_tag(msg, tipc_own_tag); |
| 295 | |
Sam Ravnborg | 1fc54d8 | 2006-03-20 22:36:47 -0800 | [diff] [blame] | 296 | if (tipc_bearer_send(&bcbearer->bearer, buf, NULL)) { |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 297 | bcl->stats.sent_nacks++; |
| 298 | buf_discard(buf); |
| 299 | } else { |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 300 | tipc_bearer_schedule(bcl->b_ptr, bcl); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 301 | bcl->proto_msg_queue = buf; |
| 302 | bcl->stats.bearer_congs++; |
| 303 | } |
| 304 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 305 | /* |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 306 | * Ensure we doesn't send another NACK msg to the node |
| 307 | * until 16 more deferred messages arrive from it |
| 308 | * (i.e. helps prevent all nodes from NACK'ing at same time) |
| 309 | */ |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 310 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 311 | n_ptr->bclink.nack_sync = tipc_own_tag; |
| 312 | } |
| 313 | } |
| 314 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 315 | /** |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 316 | * tipc_bclink_check_gap - send a NACK if a sequence gap exists |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 317 | * |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 318 | * tipc_net_lock and node lock set |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 319 | */ |
| 320 | |
David S. Miller | 6c00055 | 2008-09-02 23:38:32 -0700 | [diff] [blame] | 321 | void tipc_bclink_check_gap(struct tipc_node *n_ptr, u32 last_sent) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 322 | { |
| 323 | if (!n_ptr->bclink.supported || |
| 324 | less_eq(last_sent, mod(n_ptr->bclink.last_in))) |
| 325 | return; |
| 326 | |
| 327 | bclink_set_gap(n_ptr); |
| 328 | if (n_ptr->bclink.gap_after == n_ptr->bclink.gap_to) |
| 329 | n_ptr->bclink.gap_to = last_sent; |
| 330 | bclink_send_nack(n_ptr); |
| 331 | } |
| 332 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 333 | /** |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 334 | * tipc_bclink_peek_nack - process a NACK msg meant for another node |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 335 | * |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 336 | * Only tipc_net_lock set. |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 337 | */ |
| 338 | |
Adrian Bunk | 988f088 | 2006-03-20 22:37:52 -0800 | [diff] [blame] | 339 | static void tipc_bclink_peek_nack(u32 dest, u32 sender_tag, u32 gap_after, u32 gap_to) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 340 | { |
David S. Miller | 6c00055 | 2008-09-02 23:38:32 -0700 | [diff] [blame] | 341 | struct tipc_node *n_ptr = tipc_node_find(dest); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 342 | u32 my_after, my_to; |
| 343 | |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 344 | if (unlikely(!n_ptr || !tipc_node_is_up(n_ptr))) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 345 | return; |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 346 | tipc_node_lock(n_ptr); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 347 | /* |
| 348 | * Modify gap to suppress unnecessary NACKs from this node |
| 349 | */ |
| 350 | my_after = n_ptr->bclink.gap_after; |
| 351 | my_to = n_ptr->bclink.gap_to; |
| 352 | |
| 353 | if (less_eq(gap_after, my_after)) { |
| 354 | if (less(my_after, gap_to) && less(gap_to, my_to)) |
| 355 | n_ptr->bclink.gap_after = gap_to; |
| 356 | else if (less_eq(my_to, gap_to)) |
| 357 | n_ptr->bclink.gap_to = n_ptr->bclink.gap_after; |
| 358 | } else if (less_eq(gap_after, my_to)) { |
| 359 | if (less_eq(my_to, gap_to)) |
| 360 | n_ptr->bclink.gap_to = gap_after; |
| 361 | } else { |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 362 | /* |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 363 | * Expand gap if missing bufs not in deferred queue: |
| 364 | */ |
| 365 | struct sk_buff *buf = n_ptr->bclink.deferred_head; |
| 366 | u32 prev = n_ptr->bclink.gap_to; |
| 367 | |
| 368 | for (; buf; buf = buf->next) { |
| 369 | u32 seqno = buf_seqno(buf); |
| 370 | |
Eric Sesterhenn | 3ac9021 | 2006-06-25 23:41:15 -0700 | [diff] [blame] | 371 | if (mod(seqno - prev) != 1) { |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 372 | buf = NULL; |
Eric Sesterhenn | 3ac9021 | 2006-06-25 23:41:15 -0700 | [diff] [blame] | 373 | break; |
| 374 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 375 | if (seqno == gap_after) |
| 376 | break; |
| 377 | prev = seqno; |
| 378 | } |
| 379 | if (buf == NULL) |
| 380 | n_ptr->bclink.gap_to = gap_after; |
| 381 | } |
| 382 | /* |
| 383 | * Some nodes may send a complementary NACK now: |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 384 | */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 385 | if (bclink_ack_allowed(sender_tag + 1)) { |
| 386 | if (n_ptr->bclink.gap_to != n_ptr->bclink.gap_after) { |
| 387 | bclink_send_nack(n_ptr); |
| 388 | bclink_set_gap(n_ptr); |
| 389 | } |
| 390 | } |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 391 | tipc_node_unlock(n_ptr); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 392 | } |
| 393 | |
| 394 | /** |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 395 | * tipc_bclink_send_msg - broadcast a packet to all nodes in cluster |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 396 | */ |
| 397 | |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 398 | int tipc_bclink_send_msg(struct sk_buff *buf) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 399 | { |
| 400 | int res; |
| 401 | |
| 402 | spin_lock_bh(&bc_lock); |
| 403 | |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 404 | res = tipc_link_send_buf(bcl, buf); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 405 | if (unlikely(res == -ELINKCONG)) |
| 406 | buf_discard(buf); |
Allan Stephens | 0048b82 | 2010-08-17 11:00:10 +0000 | [diff] [blame] | 407 | else |
Allan Stephens | 5b1f7bd | 2010-08-17 11:00:09 +0000 | [diff] [blame] | 408 | bclink_set_last_sent(); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 409 | |
| 410 | if (bcl->out_queue_size > bcl->stats.max_queue_sz) |
| 411 | bcl->stats.max_queue_sz = bcl->out_queue_size; |
| 412 | bcl->stats.queue_sz_counts++; |
| 413 | bcl->stats.accu_queue_sz += bcl->out_queue_size; |
| 414 | |
| 415 | spin_unlock_bh(&bc_lock); |
| 416 | return res; |
| 417 | } |
| 418 | |
| 419 | /** |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 420 | * tipc_bclink_recv_pkt - receive a broadcast packet, and deliver upwards |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 421 | * |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 422 | * tipc_net_lock is read_locked, no other locks set |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 423 | */ |
| 424 | |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 425 | void tipc_bclink_recv_pkt(struct sk_buff *buf) |
Allan Stephens | d356eeb | 2006-06-25 23:40:01 -0700 | [diff] [blame] | 426 | { |
| 427 | #if (TIPC_BCAST_LOSS_RATE) |
Allan Stephens | e3ec9c7 | 2010-12-31 18:59:34 +0000 | [diff] [blame^] | 428 | static int rx_count; |
Allan Stephens | d356eeb | 2006-06-25 23:40:01 -0700 | [diff] [blame] | 429 | #endif |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 430 | struct tipc_msg *msg = buf_msg(buf); |
Allan Stephens | 0e65967 | 2010-12-31 18:59:32 +0000 | [diff] [blame] | 431 | struct tipc_node *node = tipc_node_find(msg_prevnode(msg)); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 432 | u32 next_in; |
| 433 | u32 seqno; |
| 434 | struct sk_buff *deferred; |
| 435 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 436 | if (unlikely(!node || !tipc_node_is_up(node) || !node->bclink.supported || |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 437 | (msg_mc_netid(msg) != tipc_net_id))) { |
| 438 | buf_discard(buf); |
| 439 | return; |
| 440 | } |
| 441 | |
| 442 | if (unlikely(msg_user(msg) == BCAST_PROTOCOL)) { |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 443 | if (msg_destnode(msg) == tipc_own_addr) { |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 444 | tipc_node_lock(node); |
| 445 | tipc_bclink_acknowledge(node, msg_bcast_ack(msg)); |
| 446 | tipc_node_unlock(node); |
Allan Stephens | d356eeb | 2006-06-25 23:40:01 -0700 | [diff] [blame] | 447 | spin_lock_bh(&bc_lock); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 448 | bcl->stats.recv_nacks++; |
Allan Stephens | d356eeb | 2006-06-25 23:40:01 -0700 | [diff] [blame] | 449 | bcl->owner->next = node; /* remember requestor */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 450 | bclink_retransmit_pkt(msg_bcgap_after(msg), |
| 451 | msg_bcgap_to(msg)); |
Allan Stephens | d356eeb | 2006-06-25 23:40:01 -0700 | [diff] [blame] | 452 | bcl->owner->next = NULL; |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 453 | spin_unlock_bh(&bc_lock); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 454 | } else { |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 455 | tipc_bclink_peek_nack(msg_destnode(msg), |
Adrian Bunk | 988f088 | 2006-03-20 22:37:52 -0800 | [diff] [blame] | 456 | msg_bcast_tag(msg), |
| 457 | msg_bcgap_after(msg), |
| 458 | msg_bcgap_to(msg)); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 459 | } |
| 460 | buf_discard(buf); |
| 461 | return; |
| 462 | } |
| 463 | |
Allan Stephens | d356eeb | 2006-06-25 23:40:01 -0700 | [diff] [blame] | 464 | #if (TIPC_BCAST_LOSS_RATE) |
| 465 | if (++rx_count == TIPC_BCAST_LOSS_RATE) { |
| 466 | rx_count = 0; |
| 467 | buf_discard(buf); |
| 468 | return; |
| 469 | } |
| 470 | #endif |
| 471 | |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 472 | tipc_node_lock(node); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 473 | receive: |
| 474 | deferred = node->bclink.deferred_head; |
| 475 | next_in = mod(node->bclink.last_in + 1); |
| 476 | seqno = msg_seqno(msg); |
| 477 | |
| 478 | if (likely(seqno == next_in)) { |
| 479 | bcl->stats.recv_info++; |
| 480 | node->bclink.last_in++; |
| 481 | bclink_set_gap(node); |
| 482 | if (unlikely(bclink_ack_allowed(seqno))) { |
| 483 | bclink_send_ack(node); |
| 484 | bcl->stats.sent_acks++; |
| 485 | } |
| 486 | if (likely(msg_isdata(msg))) { |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 487 | tipc_node_unlock(node); |
| 488 | tipc_port_recv_mcast(buf, NULL); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 489 | } else if (msg_user(msg) == MSG_BUNDLER) { |
| 490 | bcl->stats.recv_bundles++; |
| 491 | bcl->stats.recv_bundled += msg_msgcnt(msg); |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 492 | tipc_node_unlock(node); |
| 493 | tipc_link_recv_bundle(buf); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 494 | } else if (msg_user(msg) == MSG_FRAGMENTER) { |
| 495 | bcl->stats.recv_fragments++; |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 496 | if (tipc_link_recv_fragment(&node->bclink.defragm, |
| 497 | &buf, &msg)) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 498 | bcl->stats.recv_fragmented++; |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 499 | tipc_node_unlock(node); |
| 500 | tipc_net_route_msg(buf); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 501 | } else { |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 502 | tipc_node_unlock(node); |
| 503 | tipc_net_route_msg(buf); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 504 | } |
| 505 | if (deferred && (buf_seqno(deferred) == mod(next_in + 1))) { |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 506 | tipc_node_lock(node); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 507 | buf = deferred; |
| 508 | msg = buf_msg(buf); |
| 509 | node->bclink.deferred_head = deferred->next; |
| 510 | goto receive; |
| 511 | } |
| 512 | return; |
| 513 | } else if (less(next_in, seqno)) { |
| 514 | u32 gap_after = node->bclink.gap_after; |
| 515 | u32 gap_to = node->bclink.gap_to; |
| 516 | |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 517 | if (tipc_link_defer_pkt(&node->bclink.deferred_head, |
| 518 | &node->bclink.deferred_tail, |
| 519 | buf)) { |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 520 | node->bclink.nack_sync++; |
| 521 | bcl->stats.deferred_recv++; |
| 522 | if (seqno == mod(gap_after + 1)) |
| 523 | node->bclink.gap_after = seqno; |
| 524 | else if (less(gap_after, seqno) && less(seqno, gap_to)) |
| 525 | node->bclink.gap_to = seqno; |
| 526 | } |
| 527 | if (bclink_ack_allowed(node->bclink.nack_sync)) { |
| 528 | if (gap_to != gap_after) |
| 529 | bclink_send_nack(node); |
| 530 | bclink_set_gap(node); |
| 531 | } |
| 532 | } else { |
| 533 | bcl->stats.duplicates++; |
| 534 | buf_discard(buf); |
| 535 | } |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 536 | tipc_node_unlock(node); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 537 | } |
| 538 | |
David S. Miller | 6c00055 | 2008-09-02 23:38:32 -0700 | [diff] [blame] | 539 | u32 tipc_bclink_acks_missing(struct tipc_node *n_ptr) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 540 | { |
| 541 | return (n_ptr->bclink.supported && |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 542 | (tipc_bclink_get_last_sent() != n_ptr->bclink.acked)); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 543 | } |
| 544 | |
| 545 | |
| 546 | /** |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 547 | * tipc_bcbearer_send - send a packet through the broadcast pseudo-bearer |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 548 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 549 | * Send through as many bearers as necessary to reach all nodes |
| 550 | * that support TIPC multicasting. |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 551 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 552 | * Returns 0 if packet sent successfully, non-zero if not |
| 553 | */ |
| 554 | |
Adrian Bunk | 988f088 | 2006-03-20 22:37:52 -0800 | [diff] [blame] | 555 | static int tipc_bcbearer_send(struct sk_buff *buf, |
| 556 | struct tipc_bearer *unused1, |
| 557 | struct tipc_media_addr *unused2) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 558 | { |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 559 | int bp_index; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 560 | |
| 561 | /* Prepare buffer for broadcasting (if first time trying to send it) */ |
| 562 | |
| 563 | if (likely(!msg_non_seq(buf_msg(buf)))) { |
| 564 | struct tipc_msg *msg; |
| 565 | |
Allan Stephens | 8f92df6 | 2010-12-31 18:59:19 +0000 | [diff] [blame] | 566 | assert(tipc_bcast_nmap.count != 0); |
| 567 | bcbuf_set_acks(buf, tipc_bcast_nmap.count); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 568 | msg = buf_msg(buf); |
Allan Stephens | 40aecb1 | 2008-06-04 17:54:48 -0700 | [diff] [blame] | 569 | msg_set_non_seq(msg, 1); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 570 | msg_set_mc_netid(msg, tipc_net_id); |
Allan Stephens | 0048b82 | 2010-08-17 11:00:10 +0000 | [diff] [blame] | 571 | bcl->stats.sent_info++; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 572 | } |
| 573 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 574 | /* Send buffer over bearers until all targets reached */ |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 575 | |
Allan Stephens | 8f92df6 | 2010-12-31 18:59:19 +0000 | [diff] [blame] | 576 | bcbearer->remains = tipc_bcast_nmap; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 577 | |
| 578 | for (bp_index = 0; bp_index < MAX_BEARERS; bp_index++) { |
| 579 | struct bearer *p = bcbearer->bpairs[bp_index].primary; |
| 580 | struct bearer *s = bcbearer->bpairs[bp_index].secondary; |
| 581 | |
| 582 | if (!p) |
| 583 | break; /* no more bearers to try */ |
| 584 | |
Allan Stephens | 65f51ef | 2006-06-25 23:53:20 -0700 | [diff] [blame] | 585 | tipc_nmap_diff(&bcbearer->remains, &p->nodes, &bcbearer->remains_new); |
| 586 | if (bcbearer->remains_new.count == bcbearer->remains.count) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 587 | continue; /* bearer pair doesn't add anything */ |
| 588 | |
Neil Horman | 1a62483 | 2010-03-15 08:02:24 +0000 | [diff] [blame] | 589 | if (p->publ.blocked || |
| 590 | p->media->send_msg(buf, &p->publ, &p->media->bcast_addr)) { |
| 591 | /* unable to send on primary bearer */ |
| 592 | if (!s || s->publ.blocked || |
| 593 | s->media->send_msg(buf, &s->publ, |
| 594 | &s->media->bcast_addr)) { |
| 595 | /* unable to send on either bearer */ |
| 596 | continue; |
| 597 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 598 | } |
| 599 | |
Neil Horman | 1a62483 | 2010-03-15 08:02:24 +0000 | [diff] [blame] | 600 | if (s) { |
| 601 | bcbearer->bpairs[bp_index].primary = s; |
| 602 | bcbearer->bpairs[bp_index].secondary = p; |
| 603 | } |
| 604 | |
Allan Stephens | 65f51ef | 2006-06-25 23:53:20 -0700 | [diff] [blame] | 605 | if (bcbearer->remains_new.count == 0) |
Allan Stephens | 0e35fd5 | 2008-07-14 22:44:01 -0700 | [diff] [blame] | 606 | return 0; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 607 | |
Allan Stephens | 65f51ef | 2006-06-25 23:53:20 -0700 | [diff] [blame] | 608 | bcbearer->remains = bcbearer->remains_new; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 609 | } |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 610 | |
Allan Stephens | 7e3e5d0 | 2010-08-17 11:00:08 +0000 | [diff] [blame] | 611 | /* |
| 612 | * Unable to reach all targets (indicate success, since currently |
| 613 | * there isn't code in place to properly block & unblock the |
| 614 | * pseudo-bearer used by the broadcast link) |
| 615 | */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 616 | |
Allan Stephens | 7e3e5d0 | 2010-08-17 11:00:08 +0000 | [diff] [blame] | 617 | return TIPC_OK; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 618 | } |
| 619 | |
| 620 | /** |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 621 | * tipc_bcbearer_sort - create sets of bearer pairs used by broadcast bearer |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 622 | */ |
| 623 | |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 624 | void tipc_bcbearer_sort(void) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 625 | { |
| 626 | struct bcbearer_pair *bp_temp = bcbearer->bpairs_temp; |
| 627 | struct bcbearer_pair *bp_curr; |
| 628 | int b_index; |
| 629 | int pri; |
| 630 | |
| 631 | spin_lock_bh(&bc_lock); |
| 632 | |
| 633 | /* Group bearers by priority (can assume max of two per priority) */ |
| 634 | |
| 635 | memset(bp_temp, 0, sizeof(bcbearer->bpairs_temp)); |
| 636 | |
| 637 | for (b_index = 0; b_index < MAX_BEARERS; b_index++) { |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 638 | struct bearer *b = &tipc_bearers[b_index]; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 639 | |
| 640 | if (!b->active || !b->nodes.count) |
| 641 | continue; |
| 642 | |
| 643 | if (!bp_temp[b->priority].primary) |
| 644 | bp_temp[b->priority].primary = b; |
| 645 | else |
| 646 | bp_temp[b->priority].secondary = b; |
| 647 | } |
| 648 | |
| 649 | /* Create array of bearer pairs for broadcasting */ |
| 650 | |
| 651 | bp_curr = bcbearer->bpairs; |
| 652 | memset(bcbearer->bpairs, 0, sizeof(bcbearer->bpairs)); |
| 653 | |
Per Liden | 16cb4b3 | 2006-01-13 22:22:22 +0100 | [diff] [blame] | 654 | for (pri = TIPC_MAX_LINK_PRI; pri >= 0; pri--) { |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 655 | |
| 656 | if (!bp_temp[pri].primary) |
| 657 | continue; |
| 658 | |
| 659 | bp_curr->primary = bp_temp[pri].primary; |
| 660 | |
| 661 | if (bp_temp[pri].secondary) { |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 662 | if (tipc_nmap_equal(&bp_temp[pri].primary->nodes, |
| 663 | &bp_temp[pri].secondary->nodes)) { |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 664 | bp_curr->secondary = bp_temp[pri].secondary; |
| 665 | } else { |
| 666 | bp_curr++; |
| 667 | bp_curr->primary = bp_temp[pri].secondary; |
| 668 | } |
| 669 | } |
| 670 | |
| 671 | bp_curr++; |
| 672 | } |
| 673 | |
| 674 | spin_unlock_bh(&bc_lock); |
| 675 | } |
| 676 | |
| 677 | /** |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 678 | * tipc_bcbearer_push - resolve bearer congestion |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 679 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 680 | * Forces bclink to push out any unsent packets, until all packets are gone |
| 681 | * or congestion reoccurs. |
| 682 | * No locks set when function called |
| 683 | */ |
| 684 | |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 685 | void tipc_bcbearer_push(void) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 686 | { |
| 687 | struct bearer *b_ptr; |
| 688 | |
| 689 | spin_lock_bh(&bc_lock); |
| 690 | b_ptr = &bcbearer->bearer; |
| 691 | if (b_ptr->publ.blocked) { |
| 692 | b_ptr->publ.blocked = 0; |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 693 | tipc_bearer_lock_push(b_ptr); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 694 | } |
| 695 | spin_unlock_bh(&bc_lock); |
| 696 | } |
| 697 | |
| 698 | |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 699 | int tipc_bclink_stats(char *buf, const u32 buf_size) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 700 | { |
| 701 | struct print_buf pb; |
| 702 | |
| 703 | if (!bcl) |
| 704 | return 0; |
| 705 | |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 706 | tipc_printbuf_init(&pb, buf, buf_size); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 707 | |
| 708 | spin_lock_bh(&bc_lock); |
| 709 | |
| 710 | tipc_printf(&pb, "Link <%s>\n" |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 711 | " Window:%u packets\n", |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 712 | bcl->name, bcl->queue_limit[0]); |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 713 | tipc_printf(&pb, " RX packets:%u fragments:%u/%u bundles:%u/%u\n", |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 714 | bcl->stats.recv_info, |
| 715 | bcl->stats.recv_fragments, |
| 716 | bcl->stats.recv_fragmented, |
| 717 | bcl->stats.recv_bundles, |
| 718 | bcl->stats.recv_bundled); |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 719 | tipc_printf(&pb, " TX packets:%u fragments:%u/%u bundles:%u/%u\n", |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 720 | bcl->stats.sent_info, |
| 721 | bcl->stats.sent_fragments, |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 722 | bcl->stats.sent_fragmented, |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 723 | bcl->stats.sent_bundles, |
| 724 | bcl->stats.sent_bundled); |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 725 | tipc_printf(&pb, " RX naks:%u defs:%u dups:%u\n", |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 726 | bcl->stats.recv_nacks, |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 727 | bcl->stats.deferred_recv, |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 728 | bcl->stats.duplicates); |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 729 | tipc_printf(&pb, " TX naks:%u acks:%u dups:%u\n", |
| 730 | bcl->stats.sent_nacks, |
| 731 | bcl->stats.sent_acks, |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 732 | bcl->stats.retransmitted); |
| 733 | tipc_printf(&pb, " Congestion bearer:%u link:%u Send queue max:%u avg:%u\n", |
| 734 | bcl->stats.bearer_congs, |
| 735 | bcl->stats.link_congs, |
| 736 | bcl->stats.max_queue_sz, |
| 737 | bcl->stats.queue_sz_counts |
| 738 | ? (bcl->stats.accu_queue_sz / bcl->stats.queue_sz_counts) |
| 739 | : 0); |
| 740 | |
| 741 | spin_unlock_bh(&bc_lock); |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 742 | return tipc_printbuf_validate(&pb); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 743 | } |
| 744 | |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 745 | int tipc_bclink_reset_stats(void) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 746 | { |
| 747 | if (!bcl) |
| 748 | return -ENOPROTOOPT; |
| 749 | |
| 750 | spin_lock_bh(&bc_lock); |
| 751 | memset(&bcl->stats, 0, sizeof(bcl->stats)); |
| 752 | spin_unlock_bh(&bc_lock); |
Allan Stephens | 0e35fd5 | 2008-07-14 22:44:01 -0700 | [diff] [blame] | 753 | return 0; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 754 | } |
| 755 | |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 756 | int tipc_bclink_set_queue_limits(u32 limit) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 757 | { |
| 758 | if (!bcl) |
| 759 | return -ENOPROTOOPT; |
| 760 | if ((limit < TIPC_MIN_LINK_WIN) || (limit > TIPC_MAX_LINK_WIN)) |
| 761 | return -EINVAL; |
| 762 | |
| 763 | spin_lock_bh(&bc_lock); |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 764 | tipc_link_set_queue_limits(bcl, limit); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 765 | spin_unlock_bh(&bc_lock); |
Allan Stephens | 0e35fd5 | 2008-07-14 22:44:01 -0700 | [diff] [blame] | 766 | return 0; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 767 | } |
| 768 | |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 769 | int tipc_bclink_init(void) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 770 | { |
Arnaldo Carvalho de Melo | 2710b57 | 2006-11-21 01:22:12 -0200 | [diff] [blame] | 771 | bcbearer = kzalloc(sizeof(*bcbearer), GFP_ATOMIC); |
| 772 | bclink = kzalloc(sizeof(*bclink), GFP_ATOMIC); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 773 | if (!bcbearer || !bclink) { |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 774 | warn("Multicast link creation failed, no memory\n"); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 775 | kfree(bcbearer); |
| 776 | bcbearer = NULL; |
| 777 | kfree(bclink); |
| 778 | bclink = NULL; |
| 779 | return -ENOMEM; |
| 780 | } |
| 781 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 782 | INIT_LIST_HEAD(&bcbearer->bearer.cong_links); |
| 783 | bcbearer->bearer.media = &bcbearer->media; |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 784 | bcbearer->media.send_msg = tipc_bcbearer_send; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 785 | sprintf(bcbearer->media.name, "tipc-multicast"); |
| 786 | |
| 787 | bcl = &bclink->link; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 788 | INIT_LIST_HEAD(&bcl->waiting_ports); |
| 789 | bcl->next_out_no = 1; |
Ingo Molnar | 34af946 | 2006-06-27 02:53:55 -0700 | [diff] [blame] | 790 | spin_lock_init(&bclink->node.lock); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 791 | bcl->owner = &bclink->node; |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 792 | bcl->max_pkt = MAX_PKT_DEFAULT_MCAST; |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 793 | tipc_link_set_queue_limits(bcl, BCLINK_WIN_DEFAULT); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 794 | bcl->b_ptr = &bcbearer->bearer; |
| 795 | bcl->state = WORKING_WORKING; |
Stephen Hemminger | 4b704d5 | 2009-03-18 19:11:29 -0700 | [diff] [blame] | 796 | strlcpy(bcl->name, tipc_bclink_name, TIPC_MAX_LINK_NAME); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 797 | |
Allan Stephens | 0e35fd5 | 2008-07-14 22:44:01 -0700 | [diff] [blame] | 798 | return 0; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 799 | } |
| 800 | |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 801 | void tipc_bclink_stop(void) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 802 | { |
| 803 | spin_lock_bh(&bc_lock); |
| 804 | if (bcbearer) { |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 805 | tipc_link_stop(bcl); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 806 | bcl = NULL; |
| 807 | kfree(bclink); |
| 808 | bclink = NULL; |
| 809 | kfree(bcbearer); |
| 810 | bcbearer = NULL; |
| 811 | } |
| 812 | spin_unlock_bh(&bc_lock); |
| 813 | } |
| 814 | |
Allan Stephens | 3e22e62 | 2010-05-11 14:30:14 +0000 | [diff] [blame] | 815 | |
| 816 | /** |
| 817 | * tipc_nmap_add - add a node to a node map |
| 818 | */ |
| 819 | |
| 820 | void tipc_nmap_add(struct tipc_node_map *nm_ptr, u32 node) |
| 821 | { |
| 822 | int n = tipc_node(node); |
| 823 | int w = n / WSIZE; |
| 824 | u32 mask = (1 << (n % WSIZE)); |
| 825 | |
| 826 | if ((nm_ptr->map[w] & mask) == 0) { |
| 827 | nm_ptr->count++; |
| 828 | nm_ptr->map[w] |= mask; |
| 829 | } |
| 830 | } |
| 831 | |
| 832 | /** |
| 833 | * tipc_nmap_remove - remove a node from a node map |
| 834 | */ |
| 835 | |
| 836 | void tipc_nmap_remove(struct tipc_node_map *nm_ptr, u32 node) |
| 837 | { |
| 838 | int n = tipc_node(node); |
| 839 | int w = n / WSIZE; |
| 840 | u32 mask = (1 << (n % WSIZE)); |
| 841 | |
| 842 | if ((nm_ptr->map[w] & mask) != 0) { |
| 843 | nm_ptr->map[w] &= ~mask; |
| 844 | nm_ptr->count--; |
| 845 | } |
| 846 | } |
| 847 | |
| 848 | /** |
| 849 | * tipc_nmap_diff - find differences between node maps |
| 850 | * @nm_a: input node map A |
| 851 | * @nm_b: input node map B |
| 852 | * @nm_diff: output node map A-B (i.e. nodes of A that are not in B) |
| 853 | */ |
| 854 | |
stephen hemminger | 31e3c3f | 2010-10-13 13:20:35 +0000 | [diff] [blame] | 855 | static void tipc_nmap_diff(struct tipc_node_map *nm_a, |
| 856 | struct tipc_node_map *nm_b, |
| 857 | struct tipc_node_map *nm_diff) |
Allan Stephens | 3e22e62 | 2010-05-11 14:30:14 +0000 | [diff] [blame] | 858 | { |
| 859 | int stop = ARRAY_SIZE(nm_a->map); |
| 860 | int w; |
| 861 | int b; |
| 862 | u32 map; |
| 863 | |
| 864 | memset(nm_diff, 0, sizeof(*nm_diff)); |
| 865 | for (w = 0; w < stop; w++) { |
| 866 | map = nm_a->map[w] ^ (nm_a->map[w] & nm_b->map[w]); |
| 867 | nm_diff->map[w] = map; |
| 868 | if (map != 0) { |
| 869 | for (b = 0 ; b < WSIZE; b++) { |
| 870 | if (map & (1 << b)) |
| 871 | nm_diff->count++; |
| 872 | } |
| 873 | } |
| 874 | } |
| 875 | } |
Allan Stephens | 43608ed | 2010-05-11 14:30:15 +0000 | [diff] [blame] | 876 | |
| 877 | /** |
| 878 | * tipc_port_list_add - add a port to a port list, ensuring no duplicates |
| 879 | */ |
| 880 | |
| 881 | void tipc_port_list_add(struct port_list *pl_ptr, u32 port) |
| 882 | { |
| 883 | struct port_list *item = pl_ptr; |
| 884 | int i; |
| 885 | int item_sz = PLSIZE; |
| 886 | int cnt = pl_ptr->count; |
| 887 | |
| 888 | for (; ; cnt -= item_sz, item = item->next) { |
| 889 | if (cnt < PLSIZE) |
| 890 | item_sz = cnt; |
| 891 | for (i = 0; i < item_sz; i++) |
| 892 | if (item->ports[i] == port) |
| 893 | return; |
| 894 | if (i < PLSIZE) { |
| 895 | item->ports[i] = port; |
| 896 | pl_ptr->count++; |
| 897 | return; |
| 898 | } |
| 899 | if (!item->next) { |
| 900 | item->next = kmalloc(sizeof(*item), GFP_ATOMIC); |
| 901 | if (!item->next) { |
| 902 | warn("Incomplete multicast delivery, no memory\n"); |
| 903 | return; |
| 904 | } |
| 905 | item->next->next = NULL; |
| 906 | } |
| 907 | } |
| 908 | } |
| 909 | |
| 910 | /** |
| 911 | * tipc_port_list_free - free dynamically created entries in port_list chain |
| 912 | * |
| 913 | */ |
| 914 | |
| 915 | void tipc_port_list_free(struct port_list *pl_ptr) |
| 916 | { |
| 917 | struct port_list *item; |
| 918 | struct port_list *next; |
| 919 | |
| 920 | for (item = pl_ptr->next; item; item = next) { |
| 921 | next = item->next; |
| 922 | kfree(item); |
| 923 | } |
| 924 | } |
| 925 | |