| 1 | // SPDX-License-Identifier: GPL-2.0-only |
| 2 | /* |
| 3 | * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. |
| 4 | * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved. |
| 5 | */ |
| 6 | |
| 7 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| 8 | |
| 9 | #include <linux/sched.h> |
| 10 | #include <linux/cred.h> |
| 11 | #include <linux/spinlock.h> |
| 12 | #include <linux/completion.h> |
| 13 | #include <linux/buffer_head.h> |
| 14 | #include <linux/module.h> |
| 15 | #include <linux/kobject.h> |
| 16 | #include <linux/uaccess.h> |
| 17 | #include <linux/gfs2_ondisk.h> |
| 18 | #include <linux/genhd.h> |
| 19 | |
| 20 | #include "gfs2.h" |
| 21 | #include "incore.h" |
| 22 | #include "sys.h" |
| 23 | #include "super.h" |
| 24 | #include "glock.h" |
| 25 | #include "quota.h" |
| 26 | #include "util.h" |
| 27 | #include "glops.h" |
| 28 | #include "recovery.h" |
| 29 | |
| 30 | struct gfs2_attr { |
| 31 | struct attribute attr; |
| 32 | ssize_t (*show)(struct gfs2_sbd *, char *); |
| 33 | ssize_t (*store)(struct gfs2_sbd *, const char *, size_t); |
| 34 | }; |
| 35 | |
| 36 | static ssize_t gfs2_attr_show(struct kobject *kobj, struct attribute *attr, |
| 37 | char *buf) |
| 38 | { |
| 39 | struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj); |
| 40 | struct gfs2_attr *a = container_of(attr, struct gfs2_attr, attr); |
| 41 | return a->show ? a->show(sdp, buf) : 0; |
| 42 | } |
| 43 | |
| 44 | static ssize_t gfs2_attr_store(struct kobject *kobj, struct attribute *attr, |
| 45 | const char *buf, size_t len) |
| 46 | { |
| 47 | struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj); |
| 48 | struct gfs2_attr *a = container_of(attr, struct gfs2_attr, attr); |
| 49 | return a->store ? a->store(sdp, buf, len) : len; |
| 50 | } |
| 51 | |
| 52 | static const struct sysfs_ops gfs2_attr_ops = { |
| 53 | .show = gfs2_attr_show, |
| 54 | .store = gfs2_attr_store, |
| 55 | }; |
| 56 | |
| 57 | |
| 58 | static struct kset *gfs2_kset; |
| 59 | |
| 60 | static ssize_t id_show(struct gfs2_sbd *sdp, char *buf) |
| 61 | { |
| 62 | return snprintf(buf, PAGE_SIZE, "%u:%u\n", |
| 63 | MAJOR(sdp->sd_vfs->s_dev), MINOR(sdp->sd_vfs->s_dev)); |
| 64 | } |
| 65 | |
| 66 | static ssize_t fsname_show(struct gfs2_sbd *sdp, char *buf) |
| 67 | { |
| 68 | return snprintf(buf, PAGE_SIZE, "%s\n", sdp->sd_fsname); |
| 69 | } |
| 70 | |
| 71 | static ssize_t uuid_show(struct gfs2_sbd *sdp, char *buf) |
| 72 | { |
| 73 | struct super_block *s = sdp->sd_vfs; |
| 74 | |
| 75 | buf[0] = '\0'; |
| 76 | if (uuid_is_null(&s->s_uuid)) |
| 77 | return 0; |
| 78 | return snprintf(buf, PAGE_SIZE, "%pUB\n", &s->s_uuid); |
| 79 | } |
| 80 | |
| 81 | static ssize_t freeze_show(struct gfs2_sbd *sdp, char *buf) |
| 82 | { |
| 83 | struct super_block *sb = sdp->sd_vfs; |
| 84 | int frozen = (sb->s_writers.frozen == SB_UNFROZEN) ? 0 : 1; |
| 85 | |
| 86 | return snprintf(buf, PAGE_SIZE, "%d\n", frozen); |
| 87 | } |
| 88 | |
| 89 | static ssize_t freeze_store(struct gfs2_sbd *sdp, const char *buf, size_t len) |
| 90 | { |
| 91 | int error, n; |
| 92 | |
| 93 | error = kstrtoint(buf, 0, &n); |
| 94 | if (error) |
| 95 | return error; |
| 96 | |
| 97 | if (!capable(CAP_SYS_ADMIN)) |
| 98 | return -EPERM; |
| 99 | |
| 100 | switch (n) { |
| 101 | case 0: |
| 102 | error = thaw_super(sdp->sd_vfs); |
| 103 | break; |
| 104 | case 1: |
| 105 | error = freeze_super(sdp->sd_vfs); |
| 106 | break; |
| 107 | default: |
| 108 | return -EINVAL; |
| 109 | } |
| 110 | |
| 111 | if (error) { |
| 112 | fs_warn(sdp, "freeze %d error %d\n", n, error); |
| 113 | return error; |
| 114 | } |
| 115 | |
| 116 | return len; |
| 117 | } |
| 118 | |
| 119 | static ssize_t withdraw_show(struct gfs2_sbd *sdp, char *buf) |
| 120 | { |
| 121 | unsigned int b = test_bit(SDF_WITHDRAWN, &sdp->sd_flags); |
| 122 | return snprintf(buf, PAGE_SIZE, "%u\n", b); |
| 123 | } |
| 124 | |
| 125 | static ssize_t withdraw_store(struct gfs2_sbd *sdp, const char *buf, size_t len) |
| 126 | { |
| 127 | int error, val; |
| 128 | |
| 129 | if (!capable(CAP_SYS_ADMIN)) |
| 130 | return -EPERM; |
| 131 | |
| 132 | error = kstrtoint(buf, 0, &val); |
| 133 | if (error) |
| 134 | return error; |
| 135 | |
| 136 | if (val != 1) |
| 137 | return -EINVAL; |
| 138 | |
| 139 | gfs2_lm_withdraw(sdp, "withdrawing from cluster at user's request\n"); |
| 140 | |
| 141 | return len; |
| 142 | } |
| 143 | |
| 144 | static ssize_t statfs_sync_store(struct gfs2_sbd *sdp, const char *buf, |
| 145 | size_t len) |
| 146 | { |
| 147 | int error, val; |
| 148 | |
| 149 | if (!capable(CAP_SYS_ADMIN)) |
| 150 | return -EPERM; |
| 151 | |
| 152 | error = kstrtoint(buf, 0, &val); |
| 153 | if (error) |
| 154 | return error; |
| 155 | |
| 156 | if (val != 1) |
| 157 | return -EINVAL; |
| 158 | |
| 159 | gfs2_statfs_sync(sdp->sd_vfs, 0); |
| 160 | return len; |
| 161 | } |
| 162 | |
| 163 | static ssize_t quota_sync_store(struct gfs2_sbd *sdp, const char *buf, |
| 164 | size_t len) |
| 165 | { |
| 166 | int error, val; |
| 167 | |
| 168 | if (!capable(CAP_SYS_ADMIN)) |
| 169 | return -EPERM; |
| 170 | |
| 171 | error = kstrtoint(buf, 0, &val); |
| 172 | if (error) |
| 173 | return error; |
| 174 | |
| 175 | if (val != 1) |
| 176 | return -EINVAL; |
| 177 | |
| 178 | gfs2_quota_sync(sdp->sd_vfs, 0); |
| 179 | return len; |
| 180 | } |
| 181 | |
| 182 | static ssize_t quota_refresh_user_store(struct gfs2_sbd *sdp, const char *buf, |
| 183 | size_t len) |
| 184 | { |
| 185 | struct kqid qid; |
| 186 | int error; |
| 187 | u32 id; |
| 188 | |
| 189 | if (!capable(CAP_SYS_ADMIN)) |
| 190 | return -EPERM; |
| 191 | |
| 192 | error = kstrtou32(buf, 0, &id); |
| 193 | if (error) |
| 194 | return error; |
| 195 | |
| 196 | qid = make_kqid(current_user_ns(), USRQUOTA, id); |
| 197 | if (!qid_valid(qid)) |
| 198 | return -EINVAL; |
| 199 | |
| 200 | error = gfs2_quota_refresh(sdp, qid); |
| 201 | return error ? error : len; |
| 202 | } |
| 203 | |
| 204 | static ssize_t quota_refresh_group_store(struct gfs2_sbd *sdp, const char *buf, |
| 205 | size_t len) |
| 206 | { |
| 207 | struct kqid qid; |
| 208 | int error; |
| 209 | u32 id; |
| 210 | |
| 211 | if (!capable(CAP_SYS_ADMIN)) |
| 212 | return -EPERM; |
| 213 | |
| 214 | error = kstrtou32(buf, 0, &id); |
| 215 | if (error) |
| 216 | return error; |
| 217 | |
| 218 | qid = make_kqid(current_user_ns(), GRPQUOTA, id); |
| 219 | if (!qid_valid(qid)) |
| 220 | return -EINVAL; |
| 221 | |
| 222 | error = gfs2_quota_refresh(sdp, qid); |
| 223 | return error ? error : len; |
| 224 | } |
| 225 | |
| 226 | static ssize_t demote_rq_store(struct gfs2_sbd *sdp, const char *buf, size_t len) |
| 227 | { |
| 228 | struct gfs2_glock *gl; |
| 229 | const struct gfs2_glock_operations *glops; |
| 230 | unsigned int glmode; |
| 231 | unsigned int gltype; |
| 232 | unsigned long long glnum; |
| 233 | char mode[16]; |
| 234 | int rv; |
| 235 | |
| 236 | if (!capable(CAP_SYS_ADMIN)) |
| 237 | return -EPERM; |
| 238 | |
| 239 | rv = sscanf(buf, "%u:%llu %15s", &gltype, &glnum, |
| 240 | mode); |
| 241 | if (rv != 3) |
| 242 | return -EINVAL; |
| 243 | |
| 244 | if (strcmp(mode, "EX") == 0) |
| 245 | glmode = LM_ST_UNLOCKED; |
| 246 | else if ((strcmp(mode, "CW") == 0) || (strcmp(mode, "DF") == 0)) |
| 247 | glmode = LM_ST_DEFERRED; |
| 248 | else if ((strcmp(mode, "PR") == 0) || (strcmp(mode, "SH") == 0)) |
| 249 | glmode = LM_ST_SHARED; |
| 250 | else |
| 251 | return -EINVAL; |
| 252 | |
| 253 | if (gltype > LM_TYPE_JOURNAL) |
| 254 | return -EINVAL; |
| 255 | if (gltype == LM_TYPE_NONDISK && glnum == GFS2_FREEZE_LOCK) |
| 256 | glops = &gfs2_freeze_glops; |
| 257 | else |
| 258 | glops = gfs2_glops_list[gltype]; |
| 259 | if (glops == NULL) |
| 260 | return -EINVAL; |
| 261 | if (!test_and_set_bit(SDF_DEMOTE, &sdp->sd_flags)) |
| 262 | fs_info(sdp, "demote interface used\n"); |
| 263 | rv = gfs2_glock_get(sdp, glnum, glops, 0, &gl); |
| 264 | if (rv) |
| 265 | return rv; |
| 266 | gfs2_glock_cb(gl, glmode); |
| 267 | gfs2_glock_put(gl); |
| 268 | return len; |
| 269 | } |
| 270 | |
| 271 | |
| 272 | #define GFS2_ATTR(name, mode, show, store) \ |
| 273 | static struct gfs2_attr gfs2_attr_##name = __ATTR(name, mode, show, store) |
| 274 | |
| 275 | GFS2_ATTR(id, 0444, id_show, NULL); |
| 276 | GFS2_ATTR(fsname, 0444, fsname_show, NULL); |
| 277 | GFS2_ATTR(uuid, 0444, uuid_show, NULL); |
| 278 | GFS2_ATTR(freeze, 0644, freeze_show, freeze_store); |
| 279 | GFS2_ATTR(withdraw, 0644, withdraw_show, withdraw_store); |
| 280 | GFS2_ATTR(statfs_sync, 0200, NULL, statfs_sync_store); |
| 281 | GFS2_ATTR(quota_sync, 0200, NULL, quota_sync_store); |
| 282 | GFS2_ATTR(quota_refresh_user, 0200, NULL, quota_refresh_user_store); |
| 283 | GFS2_ATTR(quota_refresh_group, 0200, NULL, quota_refresh_group_store); |
| 284 | GFS2_ATTR(demote_rq, 0200, NULL, demote_rq_store); |
| 285 | |
| 286 | static struct attribute *gfs2_attrs[] = { |
| 287 | &gfs2_attr_id.attr, |
| 288 | &gfs2_attr_fsname.attr, |
| 289 | &gfs2_attr_uuid.attr, |
| 290 | &gfs2_attr_freeze.attr, |
| 291 | &gfs2_attr_withdraw.attr, |
| 292 | &gfs2_attr_statfs_sync.attr, |
| 293 | &gfs2_attr_quota_sync.attr, |
| 294 | &gfs2_attr_quota_refresh_user.attr, |
| 295 | &gfs2_attr_quota_refresh_group.attr, |
| 296 | &gfs2_attr_demote_rq.attr, |
| 297 | NULL, |
| 298 | }; |
| 299 | ATTRIBUTE_GROUPS(gfs2); |
| 300 | |
| 301 | static void gfs2_sbd_release(struct kobject *kobj) |
| 302 | { |
| 303 | struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj); |
| 304 | |
| 305 | free_sbd(sdp); |
| 306 | } |
| 307 | |
| 308 | static struct kobj_type gfs2_ktype = { |
| 309 | .release = gfs2_sbd_release, |
| 310 | .default_groups = gfs2_groups, |
| 311 | .sysfs_ops = &gfs2_attr_ops, |
| 312 | }; |
| 313 | |
| 314 | |
| 315 | /* |
| 316 | * lock_module. Originally from lock_dlm |
| 317 | */ |
| 318 | |
| 319 | static ssize_t proto_name_show(struct gfs2_sbd *sdp, char *buf) |
| 320 | { |
| 321 | const struct lm_lockops *ops = sdp->sd_lockstruct.ls_ops; |
| 322 | return sprintf(buf, "%s\n", ops->lm_proto_name); |
| 323 | } |
| 324 | |
| 325 | static ssize_t block_show(struct gfs2_sbd *sdp, char *buf) |
| 326 | { |
| 327 | struct lm_lockstruct *ls = &sdp->sd_lockstruct; |
| 328 | ssize_t ret; |
| 329 | int val = 0; |
| 330 | |
| 331 | if (test_bit(DFL_BLOCK_LOCKS, &ls->ls_recover_flags)) |
| 332 | val = 1; |
| 333 | ret = sprintf(buf, "%d\n", val); |
| 334 | return ret; |
| 335 | } |
| 336 | |
| 337 | static ssize_t block_store(struct gfs2_sbd *sdp, const char *buf, size_t len) |
| 338 | { |
| 339 | struct lm_lockstruct *ls = &sdp->sd_lockstruct; |
| 340 | int ret, val; |
| 341 | |
| 342 | ret = kstrtoint(buf, 0, &val); |
| 343 | if (ret) |
| 344 | return ret; |
| 345 | |
| 346 | if (val == 1) |
| 347 | set_bit(DFL_BLOCK_LOCKS, &ls->ls_recover_flags); |
| 348 | else if (val == 0) { |
| 349 | clear_bit(DFL_BLOCK_LOCKS, &ls->ls_recover_flags); |
| 350 | smp_mb__after_atomic(); |
| 351 | gfs2_glock_thaw(sdp); |
| 352 | } else { |
| 353 | return -EINVAL; |
| 354 | } |
| 355 | return len; |
| 356 | } |
| 357 | |
| 358 | static ssize_t wdack_show(struct gfs2_sbd *sdp, char *buf) |
| 359 | { |
| 360 | int val = completion_done(&sdp->sd_wdack) ? 1 : 0; |
| 361 | |
| 362 | return sprintf(buf, "%d\n", val); |
| 363 | } |
| 364 | |
| 365 | static ssize_t wdack_store(struct gfs2_sbd *sdp, const char *buf, size_t len) |
| 366 | { |
| 367 | int ret, val; |
| 368 | |
| 369 | ret = kstrtoint(buf, 0, &val); |
| 370 | if (ret) |
| 371 | return ret; |
| 372 | |
| 373 | if ((val == 1) && |
| 374 | !strcmp(sdp->sd_lockstruct.ls_ops->lm_proto_name, "lock_dlm")) |
| 375 | complete(&sdp->sd_wdack); |
| 376 | else |
| 377 | return -EINVAL; |
| 378 | return len; |
| 379 | } |
| 380 | |
| 381 | static ssize_t lkfirst_show(struct gfs2_sbd *sdp, char *buf) |
| 382 | { |
| 383 | struct lm_lockstruct *ls = &sdp->sd_lockstruct; |
| 384 | return sprintf(buf, "%d\n", ls->ls_first); |
| 385 | } |
| 386 | |
| 387 | static ssize_t lkfirst_store(struct gfs2_sbd *sdp, const char *buf, size_t len) |
| 388 | { |
| 389 | unsigned first; |
| 390 | int rv; |
| 391 | |
| 392 | rv = sscanf(buf, "%u", &first); |
| 393 | if (rv != 1 || first > 1) |
| 394 | return -EINVAL; |
| 395 | rv = wait_for_completion_killable(&sdp->sd_locking_init); |
| 396 | if (rv) |
| 397 | return rv; |
| 398 | spin_lock(&sdp->sd_jindex_spin); |
| 399 | rv = -EBUSY; |
| 400 | if (test_bit(SDF_NOJOURNALID, &sdp->sd_flags) == 0) |
| 401 | goto out; |
| 402 | rv = -EINVAL; |
| 403 | if (sdp->sd_args.ar_spectator) |
| 404 | goto out; |
| 405 | if (sdp->sd_lockstruct.ls_ops->lm_mount == NULL) |
| 406 | goto out; |
| 407 | sdp->sd_lockstruct.ls_first = first; |
| 408 | rv = 0; |
| 409 | out: |
| 410 | spin_unlock(&sdp->sd_jindex_spin); |
| 411 | return rv ? rv : len; |
| 412 | } |
| 413 | |
| 414 | static ssize_t first_done_show(struct gfs2_sbd *sdp, char *buf) |
| 415 | { |
| 416 | struct lm_lockstruct *ls = &sdp->sd_lockstruct; |
| 417 | return sprintf(buf, "%d\n", !!test_bit(DFL_FIRST_MOUNT_DONE, &ls->ls_recover_flags)); |
| 418 | } |
| 419 | |
| 420 | int gfs2_recover_set(struct gfs2_sbd *sdp, unsigned jid) |
| 421 | { |
| 422 | struct gfs2_jdesc *jd; |
| 423 | int rv; |
| 424 | |
| 425 | /* Wait for our primary journal to be initialized */ |
| 426 | wait_for_completion(&sdp->sd_journal_ready); |
| 427 | |
| 428 | spin_lock(&sdp->sd_jindex_spin); |
| 429 | rv = -EBUSY; |
| 430 | /** |
| 431 | * If we're a spectator, we use journal0, but it's not really ours. |
| 432 | * So we need to wait for its recovery too. If we skip it we'd never |
| 433 | * queue work to the recovery workqueue, and so its completion would |
| 434 | * never clear the DFL_BLOCK_LOCKS flag, so all our locks would |
| 435 | * permanently stop working. |
| 436 | */ |
| 437 | if (sdp->sd_jdesc->jd_jid == jid && !sdp->sd_args.ar_spectator) |
| 438 | goto out; |
| 439 | rv = -ENOENT; |
| 440 | list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) { |
| 441 | if (jd->jd_jid != jid && !sdp->sd_args.ar_spectator) |
| 442 | continue; |
| 443 | rv = gfs2_recover_journal(jd, false); |
| 444 | break; |
| 445 | } |
| 446 | out: |
| 447 | spin_unlock(&sdp->sd_jindex_spin); |
| 448 | return rv; |
| 449 | } |
| 450 | |
| 451 | static ssize_t recover_store(struct gfs2_sbd *sdp, const char *buf, size_t len) |
| 452 | { |
| 453 | unsigned jid; |
| 454 | int rv; |
| 455 | |
| 456 | rv = sscanf(buf, "%u", &jid); |
| 457 | if (rv != 1) |
| 458 | return -EINVAL; |
| 459 | |
| 460 | if (test_bit(SDF_NORECOVERY, &sdp->sd_flags)) { |
| 461 | rv = -ESHUTDOWN; |
| 462 | goto out; |
| 463 | } |
| 464 | |
| 465 | rv = gfs2_recover_set(sdp, jid); |
| 466 | out: |
| 467 | return rv ? rv : len; |
| 468 | } |
| 469 | |
| 470 | static ssize_t recover_done_show(struct gfs2_sbd *sdp, char *buf) |
| 471 | { |
| 472 | struct lm_lockstruct *ls = &sdp->sd_lockstruct; |
| 473 | return sprintf(buf, "%d\n", ls->ls_recover_jid_done); |
| 474 | } |
| 475 | |
| 476 | static ssize_t recover_status_show(struct gfs2_sbd *sdp, char *buf) |
| 477 | { |
| 478 | struct lm_lockstruct *ls = &sdp->sd_lockstruct; |
| 479 | return sprintf(buf, "%d\n", ls->ls_recover_jid_status); |
| 480 | } |
| 481 | |
| 482 | static ssize_t jid_show(struct gfs2_sbd *sdp, char *buf) |
| 483 | { |
| 484 | return sprintf(buf, "%d\n", sdp->sd_lockstruct.ls_jid); |
| 485 | } |
| 486 | |
| 487 | static ssize_t jid_store(struct gfs2_sbd *sdp, const char *buf, size_t len) |
| 488 | { |
| 489 | int jid; |
| 490 | int rv; |
| 491 | |
| 492 | rv = sscanf(buf, "%d", &jid); |
| 493 | if (rv != 1) |
| 494 | return -EINVAL; |
| 495 | rv = wait_for_completion_killable(&sdp->sd_locking_init); |
| 496 | if (rv) |
| 497 | return rv; |
| 498 | spin_lock(&sdp->sd_jindex_spin); |
| 499 | rv = -EINVAL; |
| 500 | if (sdp->sd_lockstruct.ls_ops->lm_mount == NULL) |
| 501 | goto out; |
| 502 | rv = -EBUSY; |
| 503 | if (test_bit(SDF_NOJOURNALID, &sdp->sd_flags) == 0) |
| 504 | goto out; |
| 505 | rv = 0; |
| 506 | if (sdp->sd_args.ar_spectator && jid > 0) |
| 507 | rv = jid = -EINVAL; |
| 508 | sdp->sd_lockstruct.ls_jid = jid; |
| 509 | clear_bit(SDF_NOJOURNALID, &sdp->sd_flags); |
| 510 | smp_mb__after_atomic(); |
| 511 | wake_up_bit(&sdp->sd_flags, SDF_NOJOURNALID); |
| 512 | out: |
| 513 | spin_unlock(&sdp->sd_jindex_spin); |
| 514 | return rv ? rv : len; |
| 515 | } |
| 516 | |
| 517 | #define GDLM_ATTR(_name,_mode,_show,_store) \ |
| 518 | static struct gfs2_attr gdlm_attr_##_name = __ATTR(_name,_mode,_show,_store) |
| 519 | |
| 520 | GDLM_ATTR(proto_name, 0444, proto_name_show, NULL); |
| 521 | GDLM_ATTR(block, 0644, block_show, block_store); |
| 522 | GDLM_ATTR(withdraw, 0644, wdack_show, wdack_store); |
| 523 | GDLM_ATTR(jid, 0644, jid_show, jid_store); |
| 524 | GDLM_ATTR(first, 0644, lkfirst_show, lkfirst_store); |
| 525 | GDLM_ATTR(first_done, 0444, first_done_show, NULL); |
| 526 | GDLM_ATTR(recover, 0600, NULL, recover_store); |
| 527 | GDLM_ATTR(recover_done, 0444, recover_done_show, NULL); |
| 528 | GDLM_ATTR(recover_status, 0444, recover_status_show, NULL); |
| 529 | |
| 530 | static struct attribute *lock_module_attrs[] = { |
| 531 | &gdlm_attr_proto_name.attr, |
| 532 | &gdlm_attr_block.attr, |
| 533 | &gdlm_attr_withdraw.attr, |
| 534 | &gdlm_attr_jid.attr, |
| 535 | &gdlm_attr_first.attr, |
| 536 | &gdlm_attr_first_done.attr, |
| 537 | &gdlm_attr_recover.attr, |
| 538 | &gdlm_attr_recover_done.attr, |
| 539 | &gdlm_attr_recover_status.attr, |
| 540 | NULL, |
| 541 | }; |
| 542 | |
| 543 | /* |
| 544 | * get and set struct gfs2_tune fields |
| 545 | */ |
| 546 | |
| 547 | static ssize_t quota_scale_show(struct gfs2_sbd *sdp, char *buf) |
| 548 | { |
| 549 | return snprintf(buf, PAGE_SIZE, "%u %u\n", |
| 550 | sdp->sd_tune.gt_quota_scale_num, |
| 551 | sdp->sd_tune.gt_quota_scale_den); |
| 552 | } |
| 553 | |
| 554 | static ssize_t quota_scale_store(struct gfs2_sbd *sdp, const char *buf, |
| 555 | size_t len) |
| 556 | { |
| 557 | struct gfs2_tune *gt = &sdp->sd_tune; |
| 558 | unsigned int x, y; |
| 559 | |
| 560 | if (!capable(CAP_SYS_ADMIN)) |
| 561 | return -EPERM; |
| 562 | |
| 563 | if (sscanf(buf, "%u %u", &x, &y) != 2 || !y) |
| 564 | return -EINVAL; |
| 565 | |
| 566 | spin_lock(>->gt_spin); |
| 567 | gt->gt_quota_scale_num = x; |
| 568 | gt->gt_quota_scale_den = y; |
| 569 | spin_unlock(>->gt_spin); |
| 570 | return len; |
| 571 | } |
| 572 | |
| 573 | static ssize_t tune_set(struct gfs2_sbd *sdp, unsigned int *field, |
| 574 | int check_zero, const char *buf, size_t len) |
| 575 | { |
| 576 | struct gfs2_tune *gt = &sdp->sd_tune; |
| 577 | unsigned int x; |
| 578 | int error; |
| 579 | |
| 580 | if (!capable(CAP_SYS_ADMIN)) |
| 581 | return -EPERM; |
| 582 | |
| 583 | error = kstrtouint(buf, 0, &x); |
| 584 | if (error) |
| 585 | return error; |
| 586 | |
| 587 | if (check_zero && !x) |
| 588 | return -EINVAL; |
| 589 | |
| 590 | spin_lock(>->gt_spin); |
| 591 | *field = x; |
| 592 | spin_unlock(>->gt_spin); |
| 593 | return len; |
| 594 | } |
| 595 | |
| 596 | #define TUNE_ATTR_3(name, show, store) \ |
| 597 | static struct gfs2_attr tune_attr_##name = __ATTR(name, 0644, show, store) |
| 598 | |
| 599 | #define TUNE_ATTR_2(name, store) \ |
| 600 | static ssize_t name##_show(struct gfs2_sbd *sdp, char *buf) \ |
| 601 | { \ |
| 602 | return snprintf(buf, PAGE_SIZE, "%u\n", sdp->sd_tune.gt_##name); \ |
| 603 | } \ |
| 604 | TUNE_ATTR_3(name, name##_show, store) |
| 605 | |
| 606 | #define TUNE_ATTR(name, check_zero) \ |
| 607 | static ssize_t name##_store(struct gfs2_sbd *sdp, const char *buf, size_t len)\ |
| 608 | { \ |
| 609 | return tune_set(sdp, &sdp->sd_tune.gt_##name, check_zero, buf, len); \ |
| 610 | } \ |
| 611 | TUNE_ATTR_2(name, name##_store) |
| 612 | |
| 613 | TUNE_ATTR(quota_warn_period, 0); |
| 614 | TUNE_ATTR(quota_quantum, 0); |
| 615 | TUNE_ATTR(max_readahead, 0); |
| 616 | TUNE_ATTR(complain_secs, 0); |
| 617 | TUNE_ATTR(statfs_slow, 0); |
| 618 | TUNE_ATTR(new_files_jdata, 0); |
| 619 | TUNE_ATTR(statfs_quantum, 1); |
| 620 | TUNE_ATTR_3(quota_scale, quota_scale_show, quota_scale_store); |
| 621 | |
| 622 | static struct attribute *tune_attrs[] = { |
| 623 | &tune_attr_quota_warn_period.attr, |
| 624 | &tune_attr_quota_quantum.attr, |
| 625 | &tune_attr_max_readahead.attr, |
| 626 | &tune_attr_complain_secs.attr, |
| 627 | &tune_attr_statfs_slow.attr, |
| 628 | &tune_attr_statfs_quantum.attr, |
| 629 | &tune_attr_quota_scale.attr, |
| 630 | &tune_attr_new_files_jdata.attr, |
| 631 | NULL, |
| 632 | }; |
| 633 | |
| 634 | static const struct attribute_group tune_group = { |
| 635 | .name = "tune", |
| 636 | .attrs = tune_attrs, |
| 637 | }; |
| 638 | |
| 639 | static const struct attribute_group lock_module_group = { |
| 640 | .name = "lock_module", |
| 641 | .attrs = lock_module_attrs, |
| 642 | }; |
| 643 | |
| 644 | int gfs2_sys_fs_add(struct gfs2_sbd *sdp) |
| 645 | { |
| 646 | struct super_block *sb = sdp->sd_vfs; |
| 647 | int error; |
| 648 | char ro[20]; |
| 649 | char spectator[20]; |
| 650 | char *envp[] = { ro, spectator, NULL }; |
| 651 | |
| 652 | sprintf(ro, "RDONLY=%d", sb_rdonly(sb)); |
| 653 | sprintf(spectator, "SPECTATOR=%d", sdp->sd_args.ar_spectator ? 1 : 0); |
| 654 | |
| 655 | sdp->sd_kobj.kset = gfs2_kset; |
| 656 | error = kobject_init_and_add(&sdp->sd_kobj, &gfs2_ktype, NULL, |
| 657 | "%s", sdp->sd_table_name); |
| 658 | if (error) |
| 659 | goto fail_reg; |
| 660 | |
| 661 | error = sysfs_create_group(&sdp->sd_kobj, &tune_group); |
| 662 | if (error) |
| 663 | goto fail_reg; |
| 664 | |
| 665 | error = sysfs_create_group(&sdp->sd_kobj, &lock_module_group); |
| 666 | if (error) |
| 667 | goto fail_tune; |
| 668 | |
| 669 | error = sysfs_create_link(&sdp->sd_kobj, |
| 670 | &disk_to_dev(sb->s_bdev->bd_disk)->kobj, |
| 671 | "device"); |
| 672 | if (error) |
| 673 | goto fail_lock_module; |
| 674 | |
| 675 | kobject_uevent_env(&sdp->sd_kobj, KOBJ_ADD, envp); |
| 676 | return 0; |
| 677 | |
| 678 | fail_lock_module: |
| 679 | sysfs_remove_group(&sdp->sd_kobj, &lock_module_group); |
| 680 | fail_tune: |
| 681 | sysfs_remove_group(&sdp->sd_kobj, &tune_group); |
| 682 | fail_reg: |
| 683 | fs_err(sdp, "error %d adding sysfs files\n", error); |
| 684 | kobject_put(&sdp->sd_kobj); |
| 685 | sb->s_fs_info = NULL; |
| 686 | return error; |
| 687 | } |
| 688 | |
| 689 | void gfs2_sys_fs_del(struct gfs2_sbd *sdp) |
| 690 | { |
| 691 | sysfs_remove_link(&sdp->sd_kobj, "device"); |
| 692 | sysfs_remove_group(&sdp->sd_kobj, &tune_group); |
| 693 | sysfs_remove_group(&sdp->sd_kobj, &lock_module_group); |
| 694 | kobject_put(&sdp->sd_kobj); |
| 695 | } |
| 696 | |
| 697 | static int gfs2_uevent(struct kset *kset, struct kobject *kobj, |
| 698 | struct kobj_uevent_env *env) |
| 699 | { |
| 700 | struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj); |
| 701 | struct super_block *s = sdp->sd_vfs; |
| 702 | |
| 703 | add_uevent_var(env, "LOCKTABLE=%s", sdp->sd_table_name); |
| 704 | add_uevent_var(env, "LOCKPROTO=%s", sdp->sd_proto_name); |
| 705 | if (!test_bit(SDF_NOJOURNALID, &sdp->sd_flags)) |
| 706 | add_uevent_var(env, "JOURNALID=%d", sdp->sd_lockstruct.ls_jid); |
| 707 | if (!uuid_is_null(&s->s_uuid)) |
| 708 | add_uevent_var(env, "UUID=%pUB", &s->s_uuid); |
| 709 | return 0; |
| 710 | } |
| 711 | |
| 712 | static const struct kset_uevent_ops gfs2_uevent_ops = { |
| 713 | .uevent = gfs2_uevent, |
| 714 | }; |
| 715 | |
| 716 | int gfs2_sys_init(void) |
| 717 | { |
| 718 | gfs2_kset = kset_create_and_add("gfs2", &gfs2_uevent_ops, fs_kobj); |
| 719 | if (!gfs2_kset) |
| 720 | return -ENOMEM; |
| 721 | return 0; |
| 722 | } |
| 723 | |
| 724 | void gfs2_sys_uninit(void) |
| 725 | { |
| 726 | kset_unregister(gfs2_kset); |
| 727 | } |
| 728 | |