xref: /kernel/linux/linux-5.10/fs/xfs/xfs_sysctl.c (revision 8c2ecf20) 
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (c) 2001-2005 Silicon Graphics, Inc.
4 * All Rights Reserved.
5 */
6#include "xfs.h"
7#include "xfs_error.h"
8
9static struct ctl_table_header *xfs_table_header;
10
11#ifdef CONFIG_PROC_FS
12STATIC int
13xfs_stats_clear_proc_handler(
14	struct ctl_table	*ctl,
15	int			write,
16	void			*buffer,
17	size_t			*lenp,
18	loff_t			*ppos)
19{
20	int		ret, *valp = ctl->data;
21
22	ret = proc_dointvec_minmax(ctl, write, buffer, lenp, ppos);
23
24	if (!ret && write && *valp) {
25		xfs_stats_clearall(xfsstats.xs_stats);
26		xfs_stats_clear = 0;
27	}
28
29	return ret;
30}
31
32STATIC int
33xfs_panic_mask_proc_handler(
34	struct ctl_table	*ctl,
35	int			write,
36	void			*buffer,
37	size_t			*lenp,
38	loff_t			*ppos)
39{
40	int		ret, *valp = ctl->data;
41
42	ret = proc_dointvec_minmax(ctl, write, buffer, lenp, ppos);
43	if (!ret && write) {
44		xfs_panic_mask = *valp;
45#ifdef DEBUG
46		xfs_panic_mask |= (XFS_PTAG_SHUTDOWN_CORRUPT | XFS_PTAG_LOGRES);
47#endif
48	}
49	return ret;
50}
51#endif /* CONFIG_PROC_FS */
52
53STATIC int
54xfs_deprecate_irix_sgid_inherit_proc_handler(
55	struct ctl_table	*ctl,
56	int			write,
57	void			*buffer,
58	size_t			*lenp,
59	loff_t			*ppos)
60{
61	if (write) {
62		printk_once(KERN_WARNING
63				"XFS: " "%s sysctl option is deprecated.\n",
64				ctl->procname);
65	}
66	return proc_dointvec_minmax(ctl, write, buffer, lenp, ppos);
67}
68
69STATIC int
70xfs_deprecate_irix_symlink_mode_proc_handler(
71	struct ctl_table	*ctl,
72	int			write,
73	void			*buffer,
74	size_t			*lenp,
75	loff_t			*ppos)
76{
77	if (write) {
78		printk_once(KERN_WARNING
79				"XFS: " "%s sysctl option is deprecated.\n",
80				ctl->procname);
81	}
82	return proc_dointvec_minmax(ctl, write, buffer, lenp, ppos);
83}
84
85static struct ctl_table xfs_table[] = {
86	{
87		.procname	= "irix_sgid_inherit",
88		.data		= &xfs_params.sgid_inherit.val,
89		.maxlen		= sizeof(int),
90		.mode		= 0644,
91		.proc_handler	= xfs_deprecate_irix_sgid_inherit_proc_handler,
92		.extra1		= &xfs_params.sgid_inherit.min,
93		.extra2		= &xfs_params.sgid_inherit.max
94	},
95	{
96		.procname	= "irix_symlink_mode",
97		.data		= &xfs_params.symlink_mode.val,
98		.maxlen		= sizeof(int),
99		.mode		= 0644,
100		.proc_handler	= xfs_deprecate_irix_symlink_mode_proc_handler,
101		.extra1		= &xfs_params.symlink_mode.min,
102		.extra2		= &xfs_params.symlink_mode.max
103	},
104	{
105		.procname	= "panic_mask",
106		.data		= &xfs_params.panic_mask.val,
107		.maxlen		= sizeof(int),
108		.mode		= 0644,
109		.proc_handler	= xfs_panic_mask_proc_handler,
110		.extra1		= &xfs_params.panic_mask.min,
111		.extra2		= &xfs_params.panic_mask.max
112	},
113
114	{
115		.procname	= "error_level",
116		.data		= &xfs_params.error_level.val,
117		.maxlen		= sizeof(int),
118		.mode		= 0644,
119		.proc_handler	= proc_dointvec_minmax,
120		.extra1		= &xfs_params.error_level.min,
121		.extra2		= &xfs_params.error_level.max
122	},
123	{
124		.procname	= "xfssyncd_centisecs",
125		.data		= &xfs_params.syncd_timer.val,
126		.maxlen		= sizeof(int),
127		.mode		= 0644,
128		.proc_handler	= proc_dointvec_minmax,
129		.extra1		= &xfs_params.syncd_timer.min,
130		.extra2		= &xfs_params.syncd_timer.max
131	},
132	{
133		.procname	= "inherit_sync",
134		.data		= &xfs_params.inherit_sync.val,
135		.maxlen		= sizeof(int),
136		.mode		= 0644,
137		.proc_handler	= proc_dointvec_minmax,
138		.extra1		= &xfs_params.inherit_sync.min,
139		.extra2		= &xfs_params.inherit_sync.max
140	},
141	{
142		.procname	= "inherit_nodump",
143		.data		= &xfs_params.inherit_nodump.val,
144		.maxlen		= sizeof(int),
145		.mode		= 0644,
146		.proc_handler	= proc_dointvec_minmax,
147		.extra1		= &xfs_params.inherit_nodump.min,
148		.extra2		= &xfs_params.inherit_nodump.max
149	},
150	{
151		.procname	= "inherit_noatime",
152		.data		= &xfs_params.inherit_noatim.val,
153		.maxlen		= sizeof(int),
154		.mode		= 0644,
155		.proc_handler	= proc_dointvec_minmax,
156		.extra1		= &xfs_params.inherit_noatim.min,
157		.extra2		= &xfs_params.inherit_noatim.max
158	},
159	{
160		.procname	= "inherit_nosymlinks",
161		.data		= &xfs_params.inherit_nosym.val,
162		.maxlen		= sizeof(int),
163		.mode		= 0644,
164		.proc_handler	= proc_dointvec_minmax,
165		.extra1		= &xfs_params.inherit_nosym.min,
166		.extra2		= &xfs_params.inherit_nosym.max
167	},
168	{
169		.procname	= "rotorstep",
170		.data		= &xfs_params.rotorstep.val,
171		.maxlen		= sizeof(int),
172		.mode		= 0644,
173		.proc_handler	= proc_dointvec_minmax,
174		.extra1		= &xfs_params.rotorstep.min,
175		.extra2		= &xfs_params.rotorstep.max
176	},
177	{
178		.procname	= "inherit_nodefrag",
179		.data		= &xfs_params.inherit_nodfrg.val,
180		.maxlen		= sizeof(int),
181		.mode		= 0644,
182		.proc_handler	= proc_dointvec_minmax,
183		.extra1		= &xfs_params.inherit_nodfrg.min,
184		.extra2		= &xfs_params.inherit_nodfrg.max
185	},
186	{
187		.procname	= "filestream_centisecs",
188		.data		= &xfs_params.fstrm_timer.val,
189		.maxlen		= sizeof(int),
190		.mode		= 0644,
191		.proc_handler	= proc_dointvec_minmax,
192		.extra1		= &xfs_params.fstrm_timer.min,
193		.extra2		= &xfs_params.fstrm_timer.max,
194	},
195	{
196		.procname	= "speculative_prealloc_lifetime",
197		.data		= &xfs_params.eofb_timer.val,
198		.maxlen		= sizeof(int),
199		.mode		= 0644,
200		.proc_handler	= proc_dointvec_minmax,
201		.extra1		= &xfs_params.eofb_timer.min,
202		.extra2		= &xfs_params.eofb_timer.max,
203	},
204	{
205		.procname	= "speculative_cow_prealloc_lifetime",
206		.data		= &xfs_params.cowb_timer.val,
207		.maxlen		= sizeof(int),
208		.mode		= 0644,
209		.proc_handler	= proc_dointvec_minmax,
210		.extra1		= &xfs_params.cowb_timer.min,
211		.extra2		= &xfs_params.cowb_timer.max,
212	},
213	/* please keep this the last entry */
214#ifdef CONFIG_PROC_FS
215	{
216		.procname	= "stats_clear",
217		.data		= &xfs_params.stats_clear.val,
218		.maxlen		= sizeof(int),
219		.mode		= 0644,
220		.proc_handler	= xfs_stats_clear_proc_handler,
221		.extra1		= &xfs_params.stats_clear.min,
222		.extra2		= &xfs_params.stats_clear.max
223	},
224#endif /* CONFIG_PROC_FS */
225
226	{}
227};
228
229static struct ctl_table xfs_dir_table[] = {
230	{
231		.procname	= "xfs",
232		.mode		= 0555,
233		.child		= xfs_table
234	},
235	{}
236};
237
238static struct ctl_table xfs_root_table[] = {
239	{
240		.procname	= "fs",
241		.mode		= 0555,
242		.child		= xfs_dir_table
243	},
244	{}
245};
246
247int
248xfs_sysctl_register(void)
249{
250	xfs_table_header = register_sysctl_table(xfs_root_table);
251	if (!xfs_table_header)
252		return -ENOMEM;
253	return 0;
254}
255
256void
257xfs_sysctl_unregister(void)
258{
259	unregister_sysctl_table(xfs_table_header);
260}
261