| 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 |
| 27 | xfs_stats_clear_proc_handler( |
| 28 | struct 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 |
| 57 | xfs_panic_mask_proc_handler( |
| 58 | struct 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 struct 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 | { |
| 206 | .procname = "speculative_prealloc_lifetime", |
| 207 | .data = &xfs_params.eofb_timer.val, |
| 208 | .maxlen = sizeof(int), |
| 209 | .mode = 0644, |
| 210 | .proc_handler = proc_dointvec_minmax, |
| 211 | .extra1 = &xfs_params.eofb_timer.min, |
| 212 | .extra2 = &xfs_params.eofb_timer.max, |
| 213 | }, |
| 214 | /* please keep this the last entry */ |
| 215 | #ifdef CONFIG_PROC_FS |
| 216 | { |
| 217 | .procname = "stats_clear", |
| 218 | .data = &xfs_params.stats_clear.val, |
| 219 | .maxlen = sizeof(int), |
| 220 | .mode = 0644, |
| 221 | .proc_handler = xfs_stats_clear_proc_handler, |
| 222 | .extra1 = &xfs_params.stats_clear.min, |
| 223 | .extra2 = &xfs_params.stats_clear.max |
| 224 | }, |
| 225 | #endif /* CONFIG_PROC_FS */ |
| 226 | |
| 227 | {} |
| 228 | }; |
| 229 | |
| 230 | static struct ctl_table xfs_dir_table[] = { |
| 231 | { |
| 232 | .procname = "xfs", |
| 233 | .mode = 0555, |
| 234 | .child = xfs_table |
| 235 | }, |
| 236 | {} |
| 237 | }; |
| 238 | |
| 239 | static struct ctl_table xfs_root_table[] = { |
| 240 | { |
| 241 | .procname = "fs", |
| 242 | .mode = 0555, |
| 243 | .child = xfs_dir_table |
| 244 | }, |
| 245 | {} |
| 246 | }; |
| 247 | |
| 248 | int |
| 249 | xfs_sysctl_register(void) |
| 250 | { |
| 251 | xfs_table_header = register_sysctl_table(xfs_root_table); |
| 252 | if (!xfs_table_header) |
| 253 | return -ENOMEM; |
| 254 | return 0; |
| 255 | } |
| 256 | |
| 257 | void |
| 258 | xfs_sysctl_unregister(void) |
| 259 | { |
| 260 | unregister_sysctl_table(xfs_table_header); |
| 261 | } |