xfs_sysctl.c

  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	const 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	const 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 inline int
 54xfs_deprecated_dointvec_minmax(
 55	const struct ctl_table	*ctl,
 56	int			write,
 57	void			*buffer,
 58	size_t			*lenp,
 59	loff_t			*ppos)
 60{
 61	if (write) {
 62		printk_ratelimited(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 const struct ctl_table xfs_table[] = {
 70	{
 71		.procname	= "panic_mask",
 72		.data		= &xfs_params.panic_mask.val,
 73		.maxlen		= sizeof(int),
 74		.mode		= 0644,
 75		.proc_handler	= xfs_panic_mask_proc_handler,
 76		.extra1		= &xfs_params.panic_mask.min,
 77		.extra2		= &xfs_params.panic_mask.max
 78	},
 79
 80	{
 81		.procname	= "error_level",
 82		.data		= &xfs_params.error_level.val,
 83		.maxlen		= sizeof(int),
 84		.mode		= 0644,
 85		.proc_handler	= proc_dointvec_minmax,
 86		.extra1		= &xfs_params.error_level.min,
 87		.extra2		= &xfs_params.error_level.max
 88	},
 89	{
 90		.procname	= "xfssyncd_centisecs",
 91		.data		= &xfs_params.syncd_timer.val,
 92		.maxlen		= sizeof(int),
 93		.mode		= 0644,
 94		.proc_handler	= proc_dointvec_minmax,
 95		.extra1		= &xfs_params.syncd_timer.min,
 96		.extra2		= &xfs_params.syncd_timer.max
 97	},
 98	{
 99		.procname	= "inherit_sync",
100		.data		= &xfs_params.inherit_sync.val,
101		.maxlen		= sizeof(int),
102		.mode		= 0644,
103		.proc_handler	= proc_dointvec_minmax,
104		.extra1		= &xfs_params.inherit_sync.min,
105		.extra2		= &xfs_params.inherit_sync.max
106	},
107	{
108		.procname	= "inherit_nodump",
109		.data		= &xfs_params.inherit_nodump.val,
110		.maxlen		= sizeof(int),
111		.mode		= 0644,
112		.proc_handler	= proc_dointvec_minmax,
113		.extra1		= &xfs_params.inherit_nodump.min,
114		.extra2		= &xfs_params.inherit_nodump.max
115	},
116	{
117		.procname	= "inherit_noatime",
118		.data		= &xfs_params.inherit_noatim.val,
119		.maxlen		= sizeof(int),
120		.mode		= 0644,
121		.proc_handler	= proc_dointvec_minmax,
122		.extra1		= &xfs_params.inherit_noatim.min,
123		.extra2		= &xfs_params.inherit_noatim.max
124	},
125	{
126		.procname	= "inherit_nosymlinks",
127		.data		= &xfs_params.inherit_nosym.val,
128		.maxlen		= sizeof(int),
129		.mode		= 0644,
130		.proc_handler	= proc_dointvec_minmax,
131		.extra1		= &xfs_params.inherit_nosym.min,
132		.extra2		= &xfs_params.inherit_nosym.max
133	},
134	{
135		.procname	= "rotorstep",
136		.data		= &xfs_params.rotorstep.val,
137		.maxlen		= sizeof(int),
138		.mode		= 0644,
139		.proc_handler	= proc_dointvec_minmax,
140		.extra1		= &xfs_params.rotorstep.min,
141		.extra2		= &xfs_params.rotorstep.max
142	},
143	{
144		.procname	= "inherit_nodefrag",
145		.data		= &xfs_params.inherit_nodfrg.val,
146		.maxlen		= sizeof(int),
147		.mode		= 0644,
148		.proc_handler	= proc_dointvec_minmax,
149		.extra1		= &xfs_params.inherit_nodfrg.min,
150		.extra2		= &xfs_params.inherit_nodfrg.max
151	},
152	{
153		.procname	= "filestream_centisecs",
154		.data		= &xfs_params.fstrm_timer.val,
155		.maxlen		= sizeof(int),
156		.mode		= 0644,
157		.proc_handler	= proc_dointvec_minmax,
158		.extra1		= &xfs_params.fstrm_timer.min,
159		.extra2		= &xfs_params.fstrm_timer.max,
160	},
161	{
162		.procname	= "speculative_prealloc_lifetime",
163		.data		= &xfs_params.blockgc_timer.val,
164		.maxlen		= sizeof(int),
165		.mode		= 0644,
166		.proc_handler	= proc_dointvec_minmax,
167		.extra1		= &xfs_params.blockgc_timer.min,
168		.extra2		= &xfs_params.blockgc_timer.max,
169	},
170	/* please keep this the last entry */
171#ifdef CONFIG_PROC_FS
172	{
173		.procname	= "stats_clear",
174		.data		= &xfs_params.stats_clear.val,
175		.maxlen		= sizeof(int),
176		.mode		= 0644,
177		.proc_handler	= xfs_stats_clear_proc_handler,
178		.extra1		= &xfs_params.stats_clear.min,
179		.extra2		= &xfs_params.stats_clear.max
180	},
181#endif /* CONFIG_PROC_FS */
182};
183
184int
185xfs_sysctl_register(void)
186{
187	xfs_table_header = register_sysctl("fs/xfs", xfs_table);
188	if (!xfs_table_header)
189		return -ENOMEM;
190	return 0;
191}
192
193void
194xfs_sysctl_unregister(void)
195{
196	unregister_sysctl_table(xfs_table_header);
197}