RDS/IB: rds_ib_cm_handle_connect() forgot to unlock c_cm_lock
[linux-2.6.git] / net / rds / ib_sysctl.c
1 /*
2  * Copyright (c) 2006 Oracle.  All rights reserved.
3  *
4  * This software is available to you under a choice of one of two
5  * licenses.  You may choose to be licensed under the terms of the GNU
6  * General Public License (GPL) Version 2, available from the file
7  * COPYING in the main directory of this source tree, or the
8  * OpenIB.org BSD license below:
9  *
10  *     Redistribution and use in source and binary forms, with or
11  *     without modification, are permitted provided that the following
12  *     conditions are met:
13  *
14  *      - Redistributions of source code must retain the above
15  *        copyright notice, this list of conditions and the following
16  *        disclaimer.
17  *
18  *      - Redistributions in binary form must reproduce the above
19  *        copyright notice, this list of conditions and the following
20  *        disclaimer in the documentation and/or other materials
21  *        provided with the distribution.
22  *
23  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
27  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
28  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
29  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
30  * SOFTWARE.
31  *
32  */
33 #include <linux/kernel.h>
34 #include <linux/sysctl.h>
35 #include <linux/proc_fs.h>
36
37 #include "ib.h"
38
39 static struct ctl_table_header *rds_ib_sysctl_hdr;
40
41 unsigned long rds_ib_sysctl_max_send_wr = RDS_IB_DEFAULT_SEND_WR;
42 unsigned long rds_ib_sysctl_max_recv_wr = RDS_IB_DEFAULT_RECV_WR;
43 unsigned long rds_ib_sysctl_max_recv_allocation = (128 * 1024 * 1024) / RDS_FRAG_SIZE;
44 static unsigned long rds_ib_sysctl_max_wr_min = 1;
45 /* hardware will fail CQ creation long before this */
46 static unsigned long rds_ib_sysctl_max_wr_max = (u32)~0;
47
48 unsigned long rds_ib_sysctl_max_unsig_wrs = 16;
49 static unsigned long rds_ib_sysctl_max_unsig_wr_min = 1;
50 static unsigned long rds_ib_sysctl_max_unsig_wr_max = 64;
51
52 /*
53  * This sysctl does nothing.
54  *
55  * Backwards compatibility with RDS 3.0 wire protocol
56  * disables initial FC credit exchange.
57  * If it's ever possible to drop 3.0 support,
58  * setting this to 1 and moving init/refill of send/recv
59  * rings from ib_cm_connect_complete() back into ib_setup_qp()
60  * will cause credits to be added before protocol negotiation.
61  */
62 unsigned int rds_ib_sysctl_flow_control = 0;
63
64 ctl_table rds_ib_sysctl_table[] = {
65         {
66                 .procname       = "max_send_wr",
67                 .data           = &rds_ib_sysctl_max_send_wr,
68                 .maxlen         = sizeof(unsigned long),
69                 .mode           = 0644,
70                 .proc_handler   = proc_doulongvec_minmax,
71                 .extra1         = &rds_ib_sysctl_max_wr_min,
72                 .extra2         = &rds_ib_sysctl_max_wr_max,
73         },
74         {
75                 .procname       = "max_recv_wr",
76                 .data           = &rds_ib_sysctl_max_recv_wr,
77                 .maxlen         = sizeof(unsigned long),
78                 .mode           = 0644,
79                 .proc_handler   = proc_doulongvec_minmax,
80                 .extra1         = &rds_ib_sysctl_max_wr_min,
81                 .extra2         = &rds_ib_sysctl_max_wr_max,
82         },
83         {
84                 .procname       = "max_unsignaled_wr",
85                 .data           = &rds_ib_sysctl_max_unsig_wrs,
86                 .maxlen         = sizeof(unsigned long),
87                 .mode           = 0644,
88                 .proc_handler   = proc_doulongvec_minmax,
89                 .extra1         = &rds_ib_sysctl_max_unsig_wr_min,
90                 .extra2         = &rds_ib_sysctl_max_unsig_wr_max,
91         },
92         {
93                 .procname       = "max_recv_allocation",
94                 .data           = &rds_ib_sysctl_max_recv_allocation,
95                 .maxlen         = sizeof(unsigned long),
96                 .mode           = 0644,
97                 .proc_handler   = proc_doulongvec_minmax,
98         },
99         {
100                 .procname       = "flow_control",
101                 .data           = &rds_ib_sysctl_flow_control,
102                 .maxlen         = sizeof(rds_ib_sysctl_flow_control),
103                 .mode           = 0644,
104                 .proc_handler   = proc_dointvec,
105         },
106         { }
107 };
108
109 static struct ctl_path rds_ib_sysctl_path[] = {
110         { .procname = "net", },
111         { .procname = "rds", },
112         { .procname = "ib", },
113         { }
114 };
115
116 void rds_ib_sysctl_exit(void)
117 {
118         if (rds_ib_sysctl_hdr)
119                 unregister_sysctl_table(rds_ib_sysctl_hdr);
120 }
121
122 int __init rds_ib_sysctl_init(void)
123 {
124         rds_ib_sysctl_hdr = register_sysctl_paths(rds_ib_sysctl_path, rds_ib_sysctl_table);
125         if (!rds_ib_sysctl_hdr)
126                 return -ENOMEM;
127         return 0;
128 }