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 #include "xfs_error.h"
22
23 static struct ctl_table_header *xfs_table_header;
24
25 #ifdef CONFIG_PROC_FS
26 STATIC int
xfs_stats_clear_proc_handler(ctl_table * ctl,int write,void __user * buffer,size_t * lenp,loff_t * ppos)27 xfs_stats_clear_proc_handler(
28 ctl_table *ctl,
29 int write,
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, buffer, lenp, ppos);
38
39 if (!ret && write && *valp) {
40 xfs_notice(NULL, "Clearing xfsstats");
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
56 STATIC int
xfs_panic_mask_proc_handler(ctl_table * ctl,int write,void __user * buffer,size_t * lenp,loff_t * ppos)57 xfs_panic_mask_proc_handler(
58 ctl_table *ctl,
59 int write,
60 void __user *buffer,
61 size_t *lenp,
62 loff_t *ppos)
63 {
64 int ret, *valp = ctl->data;
65
66 ret = proc_dointvec_minmax(ctl, write, buffer, lenp, ppos);
67 if (!ret && write) {
68 xfs_panic_mask = *valp;
69 #ifdef DEBUG
70 xfs_panic_mask |= (XFS_PTAG_SHUTDOWN_CORRUPT | XFS_PTAG_LOGRES);
71 #endif
72 }
73 return ret;
74 }
75 #endif /* CONFIG_PROC_FS */
76
77 static ctl_table xfs_table[] = {
78 {
79 .procname = "irix_sgid_inherit",
80 .data = &xfs_params.sgid_inherit.val,
81 .maxlen = sizeof(int),
82 .mode = 0644,
83 .proc_handler = proc_dointvec_minmax,
84 .extra1 = &xfs_params.sgid_inherit.min,
85 .extra2 = &xfs_params.sgid_inherit.max
86 },
87 {
88 .procname = "irix_symlink_mode",
89 .data = &xfs_params.symlink_mode.val,
90 .maxlen = sizeof(int),
91 .mode = 0644,
92 .proc_handler = proc_dointvec_minmax,
93 .extra1 = &xfs_params.symlink_mode.min,
94 .extra2 = &xfs_params.symlink_mode.max
95 },
96 {
97 .procname = "panic_mask",
98 .data = &xfs_params.panic_mask.val,
99 .maxlen = sizeof(int),
100 .mode = 0644,
101 .proc_handler = xfs_panic_mask_proc_handler,
102 .extra1 = &xfs_params.panic_mask.min,
103 .extra2 = &xfs_params.panic_mask.max
104 },
105
106 {
107 .procname = "error_level",
108 .data = &xfs_params.error_level.val,
109 .maxlen = sizeof(int),
110 .mode = 0644,
111 .proc_handler = proc_dointvec_minmax,
112 .extra1 = &xfs_params.error_level.min,
113 .extra2 = &xfs_params.error_level.max
114 },
115 {
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 .extra1 = &xfs_params.syncd_timer.min,
122 .extra2 = &xfs_params.syncd_timer.max
123 },
124 {
125 .procname = "inherit_sync",
126 .data = &xfs_params.inherit_sync.val,
127 .maxlen = sizeof(int),
128 .mode = 0644,
129 .proc_handler = proc_dointvec_minmax,
130 .extra1 = &xfs_params.inherit_sync.min,
131 .extra2 = &xfs_params.inherit_sync.max
132 },
133 {
134 .procname = "inherit_nodump",
135 .data = &xfs_params.inherit_nodump.val,
136 .maxlen = sizeof(int),
137 .mode = 0644,
138 .proc_handler = proc_dointvec_minmax,
139 .extra1 = &xfs_params.inherit_nodump.min,
140 .extra2 = &xfs_params.inherit_nodump.max
141 },
142 {
143 .procname = "inherit_noatime",
144 .data = &xfs_params.inherit_noatim.val,
145 .maxlen = sizeof(int),
146 .mode = 0644,
147 .proc_handler = proc_dointvec_minmax,
148 .extra1 = &xfs_params.inherit_noatim.min,
149 .extra2 = &xfs_params.inherit_noatim.max
150 },
151 {
152 .procname = "xfsbufd_centisecs",
153 .data = &xfs_params.xfs_buf_timer.val,
154 .maxlen = sizeof(int),
155 .mode = 0644,
156 .proc_handler = proc_dointvec_minmax,
157 .extra1 = &xfs_params.xfs_buf_timer.min,
158 .extra2 = &xfs_params.xfs_buf_timer.max
159 },
160 {
161 .procname = "age_buffer_centisecs",
162 .data = &xfs_params.xfs_buf_age.val,
163 .maxlen = sizeof(int),
164 .mode = 0644,
165 .proc_handler = proc_dointvec_minmax,
166 .extra1 = &xfs_params.xfs_buf_age.min,
167 .extra2 = &xfs_params.xfs_buf_age.max
168 },
169 {
170 .procname = "inherit_nosymlinks",
171 .data = &xfs_params.inherit_nosym.val,
172 .maxlen = sizeof(int),
173 .mode = 0644,
174 .proc_handler = proc_dointvec_minmax,
175 .extra1 = &xfs_params.inherit_nosym.min,
176 .extra2 = &xfs_params.inherit_nosym.max
177 },
178 {
179 .procname = "rotorstep",
180 .data = &xfs_params.rotorstep.val,
181 .maxlen = sizeof(int),
182 .mode = 0644,
183 .proc_handler = proc_dointvec_minmax,
184 .extra1 = &xfs_params.rotorstep.min,
185 .extra2 = &xfs_params.rotorstep.max
186 },
187 {
188 .procname = "inherit_nodefrag",
189 .data = &xfs_params.inherit_nodfrg.val,
190 .maxlen = sizeof(int),
191 .mode = 0644,
192 .proc_handler = proc_dointvec_minmax,
193 .extra1 = &xfs_params.inherit_nodfrg.min,
194 .extra2 = &xfs_params.inherit_nodfrg.max
195 },
196 {
197 .procname = "filestream_centisecs",
198 .data = &xfs_params.fstrm_timer.val,
199 .maxlen = sizeof(int),
200 .mode = 0644,
201 .proc_handler = proc_dointvec_minmax,
202 .extra1 = &xfs_params.fstrm_timer.min,
203 .extra2 = &xfs_params.fstrm_timer.max,
204 },
205 /* please keep this the last entry */
206 #ifdef CONFIG_PROC_FS
207 {
208 .procname = "stats_clear",
209 .data = &xfs_params.stats_clear.val,
210 .maxlen = sizeof(int),
211 .mode = 0644,
212 .proc_handler = xfs_stats_clear_proc_handler,
213 .extra1 = &xfs_params.stats_clear.min,
214 .extra2 = &xfs_params.stats_clear.max
215 },
216 #endif /* CONFIG_PROC_FS */
217
218 {}
219 };
220
221 static ctl_table xfs_dir_table[] = {
222 {
223 .procname = "xfs",
224 .mode = 0555,
225 .child = xfs_table
226 },
227 {}
228 };
229
230 static ctl_table xfs_root_table[] = {
231 {
232 .procname = "fs",
233 .mode = 0555,
234 .child = xfs_dir_table
235 },
236 {}
237 };
238
239 int
xfs_sysctl_register(void)240 xfs_sysctl_register(void)
241 {
242 xfs_table_header = register_sysctl_table(xfs_root_table);
243 if (!xfs_table_header)
244 return -ENOMEM;
245 return 0;
246 }
247
248 void
xfs_sysctl_unregister(void)249 xfs_sysctl_unregister(void)
250 {
251 unregister_sysctl_table(xfs_table_header);
252 }
253