sysctl: Drop & in front of every proc_handler.
[linux-2.6.git] / fs / xfs / linux-2.6 / xfs_sysctl.c
1 /*
2  * Copyright (c) 2001-2005 Silicon Graphics, Inc.
3  * All Rights Reserved.
4  *
5  * This program is free software; you can redistribute it and/or
6  * modify it under the terms of the GNU General Public License as
7  * published by the Free Software Foundation.
8  *
9  * This program is distributed in the hope that it would be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12  * GNU General Public License for more details.
13  *
14  * You should have received a copy of the GNU General Public License
15  * along with this program; if not, write the Free Software Foundation,
16  * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
17  */
18 #include "xfs.h"
19 #include <linux/sysctl.h>
20 #include <linux/proc_fs.h>
21
22 static struct ctl_table_header *xfs_table_header;
23
24 #ifdef CONFIG_PROC_FS
25 STATIC int
26 xfs_stats_clear_proc_handler(
27         ctl_table       *ctl,
28         int             write,
29         void            __user *buffer,
30         size_t          *lenp,
31         loff_t          *ppos)
32 {
33         int             c, ret, *valp = ctl->data;
34         __uint32_t      vn_active;
35
36         ret = proc_dointvec_minmax(ctl, write, buffer, lenp, ppos);
37
38         if (!ret && write && *valp) {
39                 printk("XFS Clearing xfsstats\n");
40                 for_each_possible_cpu(c) {
41                         preempt_disable();
42                         /* save vn_active, it's a universal truth! */
43                         vn_active = per_cpu(xfsstats, c).vn_active;
44                         memset(&per_cpu(xfsstats, c), 0,
45                                sizeof(struct xfsstats));
46                         per_cpu(xfsstats, c).vn_active = vn_active;
47                         preempt_enable();
48                 }
49                 xfs_stats_clear = 0;
50         }
51
52         return ret;
53 }
54 #endif /* CONFIG_PROC_FS */
55
56 static ctl_table xfs_table[] = {
57         {
58                 .procname       = "irix_sgid_inherit",
59                 .data           = &xfs_params.sgid_inherit.val,
60                 .maxlen         = sizeof(int),
61                 .mode           = 0644,
62                 .proc_handler   = proc_dointvec_minmax,
63                 .extra1         = &xfs_params.sgid_inherit.min,
64                 .extra2         = &xfs_params.sgid_inherit.max
65         },
66         {
67                 .procname       = "irix_symlink_mode",
68                 .data           = &xfs_params.symlink_mode.val,
69                 .maxlen         = sizeof(int),
70                 .mode           = 0644,
71                 .proc_handler   = proc_dointvec_minmax,
72                 .extra1         = &xfs_params.symlink_mode.min,
73                 .extra2         = &xfs_params.symlink_mode.max
74         },
75         {
76                 .procname       = "panic_mask",
77                 .data           = &xfs_params.panic_mask.val,
78                 .maxlen         = sizeof(int),
79                 .mode           = 0644,
80                 .proc_handler   = proc_dointvec_minmax,
81                 .extra1         = &xfs_params.panic_mask.min,
82                 .extra2         = &xfs_params.panic_mask.max
83         },
84
85         {
86                 .procname       = "error_level",
87                 .data           = &xfs_params.error_level.val,
88                 .maxlen         = sizeof(int),
89                 .mode           = 0644,
90                 .proc_handler   = proc_dointvec_minmax,
91                 .extra1         = &xfs_params.error_level.min,
92                 .extra2         = &xfs_params.error_level.max
93         },
94         {
95                 .procname       = "xfssyncd_centisecs",
96                 .data           = &xfs_params.syncd_timer.val,
97                 .maxlen         = sizeof(int),
98                 .mode           = 0644,
99                 .proc_handler   = proc_dointvec_minmax,
100                 .extra1         = &xfs_params.syncd_timer.min,
101                 .extra2         = &xfs_params.syncd_timer.max
102         },
103         {
104                 .procname       = "inherit_sync",
105                 .data           = &xfs_params.inherit_sync.val,
106                 .maxlen         = sizeof(int),
107                 .mode           = 0644,
108                 .proc_handler   = proc_dointvec_minmax,
109                 .extra1         = &xfs_params.inherit_sync.min,
110                 .extra2         = &xfs_params.inherit_sync.max
111         },
112         {
113                 .procname       = "inherit_nodump",
114                 .data           = &xfs_params.inherit_nodump.val,
115                 .maxlen         = sizeof(int),
116                 .mode           = 0644,
117                 .proc_handler   = proc_dointvec_minmax,
118                 .extra1         = &xfs_params.inherit_nodump.min,
119                 .extra2         = &xfs_params.inherit_nodump.max
120         },
121         {
122                 .procname       = "inherit_noatime",
123                 .data           = &xfs_params.inherit_noatim.val,
124                 .maxlen         = sizeof(int),
125                 .mode           = 0644,
126                 .proc_handler   = proc_dointvec_minmax,
127                 .extra1         = &xfs_params.inherit_noatim.min,
128                 .extra2         = &xfs_params.inherit_noatim.max
129         },
130         {
131                 .procname       = "xfsbufd_centisecs",
132                 .data           = &xfs_params.xfs_buf_timer.val,
133                 .maxlen         = sizeof(int),
134                 .mode           = 0644,
135                 .proc_handler   = proc_dointvec_minmax,
136                 .extra1         = &xfs_params.xfs_buf_timer.min,
137                 .extra2         = &xfs_params.xfs_buf_timer.max
138         },
139         {
140                 .procname       = "age_buffer_centisecs",
141                 .data           = &xfs_params.xfs_buf_age.val,
142                 .maxlen         = sizeof(int),
143                 .mode           = 0644,
144                 .proc_handler   = proc_dointvec_minmax,
145                 .extra1         = &xfs_params.xfs_buf_age.min,
146                 .extra2         = &xfs_params.xfs_buf_age.max
147         },
148         {
149                 .procname       = "inherit_nosymlinks",
150                 .data           = &xfs_params.inherit_nosym.val,
151                 .maxlen         = sizeof(int),
152                 .mode           = 0644,
153                 .proc_handler   = proc_dointvec_minmax,
154                 .extra1         = &xfs_params.inherit_nosym.min,
155                 .extra2         = &xfs_params.inherit_nosym.max
156         },
157         {
158                 .procname       = "rotorstep",
159                 .data           = &xfs_params.rotorstep.val,
160                 .maxlen         = sizeof(int),
161                 .mode           = 0644,
162                 .proc_handler   = proc_dointvec_minmax,
163                 .extra1         = &xfs_params.rotorstep.min,
164                 .extra2         = &xfs_params.rotorstep.max
165         },
166         {
167                 .procname       = "inherit_nodefrag",
168                 .data           = &xfs_params.inherit_nodfrg.val,
169                 .maxlen         = sizeof(int),
170                 .mode           = 0644,
171                 .proc_handler   = proc_dointvec_minmax,
172                 .extra1         = &xfs_params.inherit_nodfrg.min,
173                 .extra2         = &xfs_params.inherit_nodfrg.max
174         },
175         {
176                 .procname       = "filestream_centisecs",
177                 .data           = &xfs_params.fstrm_timer.val,
178                 .maxlen         = sizeof(int),
179                 .mode           = 0644,
180                 .proc_handler   = proc_dointvec_minmax,
181                 .extra1         = &xfs_params.fstrm_timer.min,
182                 .extra2         = &xfs_params.fstrm_timer.max,
183         },
184         /* please keep this the last entry */
185 #ifdef CONFIG_PROC_FS
186         {
187                 .procname       = "stats_clear",
188                 .data           = &xfs_params.stats_clear.val,
189                 .maxlen         = sizeof(int),
190                 .mode           = 0644,
191                 .proc_handler   = xfs_stats_clear_proc_handler,
192                 .extra1         = &xfs_params.stats_clear.min,
193                 .extra2         = &xfs_params.stats_clear.max
194         },
195 #endif /* CONFIG_PROC_FS */
196
197         {}
198 };
199
200 static ctl_table xfs_dir_table[] = {
201         {
202                 .procname       = "xfs",
203                 .mode           = 0555,
204                 .child          = xfs_table
205         },
206         {}
207 };
208
209 static ctl_table xfs_root_table[] = {
210         {
211                 .procname       = "fs",
212                 .mode           = 0555,
213                 .child          = xfs_dir_table
214         },
215         {}
216 };
217
218 int
219 xfs_sysctl_register(void)
220 {
221         xfs_table_header = register_sysctl_table(xfs_root_table);
222         if (!xfs_table_header)
223                 return -ENOMEM;
224         return 0;
225 }
226
227 void
228 xfs_sysctl_unregister(void)
229 {
230         unregister_sysctl_table(xfs_table_header);
231 }