fs/xfs/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
   9 static struct ctl_table_header *xfs_table_header;
  10
  11 #ifdef CONFIG_PROC_FS
  12 STATIC int
  13 xfs_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
  32 STATIC int
  33 xfs_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
  53 STATIC int
  54 xfs_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
  69 STATIC int
  70 xfs_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
  85 static 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
 229 static struct ctl_table xfs_dir_table[] = {
 230         {
 231                 .procname       = "xfs",
 232                 .mode           = 0555,
 233                 .child          = xfs_table
 234         },
 235         {}
 236 };
 237
 238 static struct ctl_table xfs_root_table[] = {
 239         {
 240                 .procname       = "fs",
 241                 .mode           = 0555,
 242                 .child          = xfs_dir_table
 243         },
 244         {}
 245 };
 246
 247 int
 248 xfs_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
 256 void
 257 xfs_sysctl_unregister(void)
 258 {
 259         unregister_sysctl_table(xfs_table_header);
 260 }