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 struct file *filp,
30 void __user *buffer,
31 size_t *lenp,
32 loff_t *ppos)
33 {
34 int c, ret, *valp = ctl->data;
35 __uint32_t vn_active;
36
37 ret = proc_dointvec_minmax(ctl, write, filp, buffer, lenp, ppos);
38
39 if (!ret && write && *valp) {
40 printk("XFS Clearing xfsstats\n");
41 for_each_possible_cpu(c) {
42 preempt_disable();
43 /* save vn_active, it's a universal truth! */
44 vn_active = per_cpu(xfsstats, c).vn_active;
45 memset(&per_cpu(xfsstats, c), 0,
46 sizeof(struct xfsstats));
47 per_cpu(xfsstats, c).vn_active = vn_active;
48 preempt_enable();
49 }
50 xfs_stats_clear = 0;
51 }
52
53 return ret;
54 }
55 #endif /* CONFIG_PROC_FS */
56
57 static ctl_table xfs_table[] = {
58 {
59 .ctl_name = XFS_RESTRICT_CHOWN,
60 .procname = "restrict_chown",
61 .data = &xfs_params.restrict_chown.val,
62 .maxlen = sizeof(int),
63 .mode = 0644,
64 .proc_handler = &proc_dointvec_minmax,
65 .strategy = &sysctl_intvec,
66 .extra1 = &xfs_params.restrict_chown.min,
67 .extra2 = &xfs_params.restrict_chown.max
68 },
69 {
70 .ctl_name = XFS_SGID_INHERIT,
71 .procname = "irix_sgid_inherit",
72 .data = &xfs_params.sgid_inherit.val,
73 .maxlen = sizeof(int),
74 .mode = 0644,
75 .proc_handler = &proc_dointvec_minmax,
76 .strategy = &sysctl_intvec,
77 .extra1 = &xfs_params.sgid_inherit.min,
78 .extra2 = &xfs_params.sgid_inherit.max
79 },
80 {
81 .ctl_name = XFS_SYMLINK_MODE,
82 .procname = "irix_symlink_mode",
83 .data = &xfs_params.symlink_mode.val,
84 .maxlen = sizeof(int),
85 .mode = 0644,
86 .proc_handler = &proc_dointvec_minmax,
87 .strategy = &sysctl_intvec,
88 .extra1 = &xfs_params.symlink_mode.min,
89 .extra2 = &xfs_params.symlink_mode.max
90 },
91 {
92 .ctl_name = XFS_PANIC_MASK,
93 .procname = "panic_mask",
94 .data = &xfs_params.panic_mask.val,
95 .maxlen = sizeof(int),
96 .mode = 0644,
97 .proc_handler = &proc_dointvec_minmax,
98 .strategy = &sysctl_intvec,
99 .extra1 = &xfs_params.panic_mask.min,
100 .extra2 = &xfs_params.panic_mask.max
101 },
102
103 {
104 .ctl_name = XFS_ERRLEVEL,
105 .procname = "error_level",
106 .data = &xfs_params.error_level.val,
107 .maxlen = sizeof(int),
108 .mode = 0644,
109 .proc_handler = &proc_dointvec_minmax,
110 .strategy = &sysctl_intvec,
111 .extra1 = &xfs_params.error_level.min,
112 .extra2 = &xfs_params.error_level.max
113 },
114 {
115 .ctl_name = XFS_SYNCD_TIMER,
116 .procname = "xfssyncd_centisecs",
117 .data = &xfs_params.syncd_timer.val,
118 .maxlen = sizeof(int),
119 .mode = 0644,
120 .proc_handler = &proc_dointvec_minmax,
121 .strategy = &sysctl_intvec,
122 .extra1 = &xfs_params.syncd_timer.min,
123 .extra2 = &xfs_params.syncd_timer.max
124 },
125 {
126 .ctl_name = XFS_INHERIT_SYNC,
127 .procname = "inherit_sync",
128 .data = &xfs_params.inherit_sync.val,
129 .maxlen = sizeof(int),
130 .mode = 0644,
131 .proc_handler = &proc_dointvec_minmax,
132 .strategy = &sysctl_intvec,
133 .extra1 = &xfs_params.inherit_sync.min,
134 .extra2 = &xfs_params.inherit_sync.max
135 },
136 {
137 .ctl_name = XFS_INHERIT_NODUMP,
138 .procname = "inherit_nodump",
139 .data = &xfs_params.inherit_nodump.val,
140 .maxlen = sizeof(int),
141 .mode = 0644,
142 .proc_handler = &proc_dointvec_minmax,
143 .strategy = &sysctl_intvec,
144 .extra1 = &xfs_params.inherit_nodump.min,
145 .extra2 = &xfs_params.inherit_nodump.max
146 },
147 {
148 .ctl_name = XFS_INHERIT_NOATIME,
149 .procname = "inherit_noatime",
150 .data = &xfs_params.inherit_noatim.val,
151 .maxlen = sizeof(int),
152 .mode = 0644,
153 .proc_handler = &proc_dointvec_minmax,
154 .strategy = &sysctl_intvec,
155 .extra1 = &xfs_params.inherit_noatim.min,
156 .extra2 = &xfs_params.inherit_noatim.max
157 },
158 {
159 .ctl_name = XFS_BUF_TIMER,
160 .procname = "xfsbufd_centisecs",
161 .data = &xfs_params.xfs_buf_timer.val,
162 .maxlen = sizeof(int),
163 .mode = 0644,
164 .proc_handler = &proc_dointvec_minmax,
165 .strategy = &sysctl_intvec,
166 .extra1 = &xfs_params.xfs_buf_timer.min,
167 .extra2 = &xfs_params.xfs_buf_timer.max
168 },
169 {
170 .ctl_name = XFS_BUF_AGE,
171 .procname = "age_buffer_centisecs",
172 .data = &xfs_params.xfs_buf_age.val,
173 .maxlen = sizeof(int),
174 .mode = 0644,
175 .proc_handler = &proc_dointvec_minmax,
176 .strategy = &sysctl_intvec,
177 .extra1 = &xfs_params.xfs_buf_age.min,
178 .extra2 = &xfs_params.xfs_buf_age.max
179 },
180 {
181 .ctl_name = XFS_INHERIT_NOSYM,
182 .procname = "inherit_nosymlinks",
183 .data = &xfs_params.inherit_nosym.val,
184 .maxlen = sizeof(int),
185 .mode = 0644,
186 .proc_handler = &proc_dointvec_minmax,
187 .strategy = &sysctl_intvec,
188 .extra1 = &xfs_params.inherit_nosym.min,
189 .extra2 = &xfs_params.inherit_nosym.max
190 },
191 {
192 .ctl_name = XFS_ROTORSTEP,
193 .procname = "rotorstep",
194 .data = &xfs_params.rotorstep.val,
195 .maxlen = sizeof(int),
196 .mode = 0644,
197 .proc_handler = &proc_dointvec_minmax,
198 .strategy = &sysctl_intvec,
199 .extra1 = &xfs_params.rotorstep.min,
200 .extra2 = &xfs_params.rotorstep.max
201 },
202 {
203 .ctl_name = XFS_INHERIT_NODFRG,
204 .procname = "inherit_nodefrag",
205 .data = &xfs_params.inherit_nodfrg.val,
206 .maxlen = sizeof(int),
207 .mode = 0644,
208 .proc_handler = &proc_dointvec_minmax,
209 .strategy = &sysctl_intvec,
210 .extra1 = &xfs_params.inherit_nodfrg.min,
211 .extra2 = &xfs_params.inherit_nodfrg.max
212 },
213 {
214 .ctl_name = XFS_FILESTREAM_TIMER,
215 .procname = "filestream_centisecs",
216 .data = &xfs_params.fstrm_timer.val,
217 .maxlen = sizeof(int),
218 .mode = 0644,
219 .proc_handler = &proc_dointvec_minmax,
220 .strategy = &sysctl_intvec,
221 .extra1 = &xfs_params.fstrm_timer.min,
222 .extra2 = &xfs_params.fstrm_timer.max,
223 },
224 /* please keep this the last entry */
225 #ifdef CONFIG_PROC_FS
226 {
227 .ctl_name = XFS_STATS_CLEAR,
228 .procname = "stats_clear",
229 .data = &xfs_params.stats_clear.val,
230 .maxlen = sizeof(int),
231 .mode = 0644,
232 .proc_handler = &xfs_stats_clear_proc_handler,
233 .strategy = &sysctl_intvec,
234 .extra1 = &xfs_params.stats_clear.min,
235 .extra2 = &xfs_params.stats_clear.max
236 },
237 #endif /* CONFIG_PROC_FS */
238
239 {}
240 };
241
242 static ctl_table xfs_dir_table[] = {
243 {
244 .ctl_name = FS_XFS,
245 .procname = "xfs",
246 .mode = 0555,
247 .child = xfs_table
248 },
249 {}
250 };
251
252 static ctl_table xfs_root_table[] = {
253 {
254 .ctl_name = CTL_FS,
255 .procname = "fs",
256 .mode = 0555,
257 .child = xfs_dir_table
258 },
259 {}
260 };
261
262 void
263 xfs_sysctl_register(void)
264 {
265 xfs_table_header = register_sysctl_table(xfs_root_table);
266 }
267
268 void
269 xfs_sysctl_unregister(void)
270 {
271 if (xfs_table_header)
272 unregister_sysctl_table(xfs_table_header);
273 }
274
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