17336d0e6SThomas Gleixner // SPDX-License-Identifier: GPL-2.0-only 2b3b94faaSDavid Teigland /* 3b3b94faaSDavid Teigland * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. 43a8a9a10SSteven Whitehouse * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved. 5b3b94faaSDavid Teigland */ 6b3b94faaSDavid Teigland 7d77d1b58SJoe Perches #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 8d77d1b58SJoe Perches 9b3b94faaSDavid Teigland #include <linux/sched.h> 105b825c3aSIngo Molnar #include <linux/cred.h> 11b3b94faaSDavid Teigland #include <linux/spinlock.h> 12b3b94faaSDavid Teigland #include <linux/completion.h> 13b3b94faaSDavid Teigland #include <linux/buffer_head.h> 14b3b94faaSDavid Teigland #include <linux/module.h> 15b3b94faaSDavid Teigland #include <linux/kobject.h> 167c0f6ba6SLinus Torvalds #include <linux/uaccess.h> 17f057f6cdSSteven Whitehouse #include <linux/gfs2_ondisk.h> 1831e54b01SSteven Whitehouse #include <linux/genhd.h> 19b3b94faaSDavid Teigland 20b3b94faaSDavid Teigland #include "gfs2.h" 215c676f6dSSteven Whitehouse #include "incore.h" 22b3b94faaSDavid Teigland #include "sys.h" 23b3b94faaSDavid Teigland #include "super.h" 24b3b94faaSDavid Teigland #include "glock.h" 25b3b94faaSDavid Teigland #include "quota.h" 265c676f6dSSteven Whitehouse #include "util.h" 2764d576baSSteven Whitehouse #include "glops.h" 286ecd7c2dSTejun Heo #include "recovery.h" 29b3b94faaSDavid Teigland 3048c2b613SSteven Whitehouse struct gfs2_attr { 3148c2b613SSteven Whitehouse struct attribute attr; 3248c2b613SSteven Whitehouse ssize_t (*show)(struct gfs2_sbd *, char *); 3348c2b613SSteven Whitehouse ssize_t (*store)(struct gfs2_sbd *, const char *, size_t); 3448c2b613SSteven Whitehouse }; 3548c2b613SSteven Whitehouse 3648c2b613SSteven Whitehouse static ssize_t gfs2_attr_show(struct kobject *kobj, struct attribute *attr, 3748c2b613SSteven Whitehouse char *buf) 3848c2b613SSteven Whitehouse { 3948c2b613SSteven Whitehouse struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj); 4048c2b613SSteven Whitehouse struct gfs2_attr *a = container_of(attr, struct gfs2_attr, attr); 4148c2b613SSteven Whitehouse return a->show ? a->show(sdp, buf) : 0; 4248c2b613SSteven Whitehouse } 4348c2b613SSteven Whitehouse 4448c2b613SSteven Whitehouse static ssize_t gfs2_attr_store(struct kobject *kobj, struct attribute *attr, 4548c2b613SSteven Whitehouse const char *buf, size_t len) 4648c2b613SSteven Whitehouse { 4748c2b613SSteven Whitehouse struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj); 4848c2b613SSteven Whitehouse struct gfs2_attr *a = container_of(attr, struct gfs2_attr, attr); 4948c2b613SSteven Whitehouse return a->store ? a->store(sdp, buf, len) : len; 5048c2b613SSteven Whitehouse } 5148c2b613SSteven Whitehouse 5252cf25d0SEmese Revfy static const struct sysfs_ops gfs2_attr_ops = { 5348c2b613SSteven Whitehouse .show = gfs2_attr_show, 5448c2b613SSteven Whitehouse .store = gfs2_attr_store, 5548c2b613SSteven Whitehouse }; 5648c2b613SSteven Whitehouse 5748c2b613SSteven Whitehouse 5848c2b613SSteven Whitehouse static struct kset *gfs2_kset; 5948c2b613SSteven Whitehouse 60b3b94faaSDavid Teigland static ssize_t id_show(struct gfs2_sbd *sdp, char *buf) 61b3b94faaSDavid Teigland { 62c7227e46SBob Peterson return snprintf(buf, PAGE_SIZE, "%u:%u\n", 63c7227e46SBob Peterson MAJOR(sdp->sd_vfs->s_dev), MINOR(sdp->sd_vfs->s_dev)); 64b3b94faaSDavid Teigland } 65b3b94faaSDavid Teigland 66b3b94faaSDavid Teigland static ssize_t fsname_show(struct gfs2_sbd *sdp, char *buf) 67b3b94faaSDavid Teigland { 683204a6c0SDavid Teigland return snprintf(buf, PAGE_SIZE, "%s\n", sdp->sd_fsname); 69b3b94faaSDavid Teigland } 70b3b94faaSDavid Teigland 7102e3cc70SSteven Whitehouse static ssize_t uuid_show(struct gfs2_sbd *sdp, char *buf) 7202e3cc70SSteven Whitehouse { 7332e471efSSteven Whitehouse struct super_block *s = sdp->sd_vfs; 7485787090SChristoph Hellwig 7502e3cc70SSteven Whitehouse buf[0] = '\0'; 7685787090SChristoph Hellwig if (uuid_is_null(&s->s_uuid)) 7702e3cc70SSteven Whitehouse return 0; 7885787090SChristoph Hellwig return snprintf(buf, PAGE_SIZE, "%pUB\n", &s->s_uuid); 7902e3cc70SSteven Whitehouse } 8002e3cc70SSteven Whitehouse 81b3b94faaSDavid Teigland static ssize_t freeze_show(struct gfs2_sbd *sdp, char *buf) 82b3b94faaSDavid Teigland { 83d564053fSSteven Whitehouse struct super_block *sb = sdp->sd_vfs; 84d564053fSSteven Whitehouse int frozen = (sb->s_writers.frozen == SB_UNFROZEN) ? 0 : 1; 85b3b94faaSDavid Teigland 863566c964Salex chen return snprintf(buf, PAGE_SIZE, "%d\n", frozen); 87b3b94faaSDavid Teigland } 88b3b94faaSDavid Teigland 89b3b94faaSDavid Teigland static ssize_t freeze_store(struct gfs2_sbd *sdp, const char *buf, size_t len) 90b3b94faaSDavid Teigland { 91e50ead48SFabian Frederick int error, n; 92e50ead48SFabian Frederick 93e50ead48SFabian Frederick error = kstrtoint(buf, 0, &n); 94e50ead48SFabian Frederick if (error) 95e50ead48SFabian Frederick return error; 96b3b94faaSDavid Teigland 97b3b94faaSDavid Teigland if (!capable(CAP_SYS_ADMIN)) 9841735818SZhao Hongjiang return -EPERM; 99b3b94faaSDavid Teigland 100b3b94faaSDavid Teigland switch (n) { 101b3b94faaSDavid Teigland case 0: 102d564053fSSteven Whitehouse error = thaw_super(sdp->sd_vfs); 103b3b94faaSDavid Teigland break; 104b3b94faaSDavid Teigland case 1: 105d564053fSSteven Whitehouse error = freeze_super(sdp->sd_vfs); 106b3b94faaSDavid Teigland break; 107b3b94faaSDavid Teigland default: 108d564053fSSteven Whitehouse return -EINVAL; 109b3b94faaSDavid Teigland } 110b3b94faaSDavid Teigland 111d564053fSSteven Whitehouse if (error) { 112af38816eSAndreas Gruenbacher fs_warn(sdp, "freeze %d error %d\n", n, error); 113d564053fSSteven Whitehouse return error; 114d564053fSSteven Whitehouse } 115b3b94faaSDavid Teigland 116d564053fSSteven Whitehouse return len; 117b3b94faaSDavid Teigland } 118b3b94faaSDavid Teigland 119b3b94faaSDavid Teigland static ssize_t withdraw_show(struct gfs2_sbd *sdp, char *buf) 120b3b94faaSDavid Teigland { 121eb43e660SBob Peterson unsigned int b = gfs2_withdrawn(sdp); 1223204a6c0SDavid Teigland return snprintf(buf, PAGE_SIZE, "%u\n", b); 123b3b94faaSDavid Teigland } 124b3b94faaSDavid Teigland 125b3b94faaSDavid Teigland static ssize_t withdraw_store(struct gfs2_sbd *sdp, const char *buf, size_t len) 126b3b94faaSDavid Teigland { 127e50ead48SFabian Frederick int error, val; 128e50ead48SFabian Frederick 129b3b94faaSDavid Teigland if (!capable(CAP_SYS_ADMIN)) 13041735818SZhao Hongjiang return -EPERM; 131b3b94faaSDavid Teigland 132e50ead48SFabian Frederick error = kstrtoint(buf, 0, &val); 133e50ead48SFabian Frederick if (error) 134e50ead48SFabian Frederick return error; 135e50ead48SFabian Frederick 136e50ead48SFabian Frederick if (val != 1) 137b3b94faaSDavid Teigland return -EINVAL; 138b3b94faaSDavid Teigland 139*badb55ecSAndreas Gruenbacher gfs2_lm(sdp, "withdrawing from cluster at user's request\n"); 140*badb55ecSAndreas Gruenbacher gfs2_withdraw(sdp); 141cb94eb06SJoe Perches 142b3b94faaSDavid Teigland return len; 143b3b94faaSDavid Teigland } 144b3b94faaSDavid Teigland 145b3b94faaSDavid Teigland static ssize_t statfs_sync_store(struct gfs2_sbd *sdp, const char *buf, 146b3b94faaSDavid Teigland size_t len) 147b3b94faaSDavid Teigland { 148e50ead48SFabian Frederick int error, val; 149e50ead48SFabian Frederick 150b3b94faaSDavid Teigland if (!capable(CAP_SYS_ADMIN)) 15141735818SZhao Hongjiang return -EPERM; 152b3b94faaSDavid Teigland 153e50ead48SFabian Frederick error = kstrtoint(buf, 0, &val); 154e50ead48SFabian Frederick if (error) 155e50ead48SFabian Frederick return error; 156e50ead48SFabian Frederick 157e50ead48SFabian Frederick if (val != 1) 158b3b94faaSDavid Teigland return -EINVAL; 159b3b94faaSDavid Teigland 1608c42d637SSteven Whitehouse gfs2_statfs_sync(sdp->sd_vfs, 0); 161b3b94faaSDavid Teigland return len; 162b3b94faaSDavid Teigland } 163b3b94faaSDavid Teigland 164b3b94faaSDavid Teigland static ssize_t quota_sync_store(struct gfs2_sbd *sdp, const char *buf, 165b3b94faaSDavid Teigland size_t len) 166b3b94faaSDavid Teigland { 167e50ead48SFabian Frederick int error, val; 168e50ead48SFabian Frederick 169b3b94faaSDavid Teigland if (!capable(CAP_SYS_ADMIN)) 17041735818SZhao Hongjiang return -EPERM; 171b3b94faaSDavid Teigland 172e50ead48SFabian Frederick error = kstrtoint(buf, 0, &val); 173e50ead48SFabian Frederick if (error) 174e50ead48SFabian Frederick return error; 175e50ead48SFabian Frederick 176e50ead48SFabian Frederick if (val != 1) 177b3b94faaSDavid Teigland return -EINVAL; 178b3b94faaSDavid Teigland 179ceed1723SJan Kara gfs2_quota_sync(sdp->sd_vfs, 0); 180b3b94faaSDavid Teigland return len; 181b3b94faaSDavid Teigland } 182b3b94faaSDavid Teigland 183b3b94faaSDavid Teigland static ssize_t quota_refresh_user_store(struct gfs2_sbd *sdp, const char *buf, 184b3b94faaSDavid Teigland size_t len) 185b3b94faaSDavid Teigland { 186ed87dabcSEric W. Biederman struct kqid qid; 187ea762338SSteven Whitehouse int error; 188cd915493SSteven Whitehouse u32 id; 189b3b94faaSDavid Teigland 190b3b94faaSDavid Teigland if (!capable(CAP_SYS_ADMIN)) 19141735818SZhao Hongjiang return -EPERM; 192b3b94faaSDavid Teigland 193e50ead48SFabian Frederick error = kstrtou32(buf, 0, &id); 194e50ead48SFabian Frederick if (error) 195e50ead48SFabian Frederick return error; 196b3b94faaSDavid Teigland 197ed87dabcSEric W. Biederman qid = make_kqid(current_user_ns(), USRQUOTA, id); 198ed87dabcSEric W. Biederman if (!qid_valid(qid)) 199ed87dabcSEric W. Biederman return -EINVAL; 200ed87dabcSEric W. Biederman 201ed87dabcSEric W. Biederman error = gfs2_quota_refresh(sdp, qid); 202ea762338SSteven Whitehouse return error ? error : len; 203b3b94faaSDavid Teigland } 204b3b94faaSDavid Teigland 205b3b94faaSDavid Teigland static ssize_t quota_refresh_group_store(struct gfs2_sbd *sdp, const char *buf, 206b3b94faaSDavid Teigland size_t len) 207b3b94faaSDavid Teigland { 208ed87dabcSEric W. Biederman struct kqid qid; 209ea762338SSteven Whitehouse int error; 210cd915493SSteven Whitehouse u32 id; 211b3b94faaSDavid Teigland 212b3b94faaSDavid Teigland if (!capable(CAP_SYS_ADMIN)) 21341735818SZhao Hongjiang return -EPERM; 214b3b94faaSDavid Teigland 215e50ead48SFabian Frederick error = kstrtou32(buf, 0, &id); 216e50ead48SFabian Frederick if (error) 217e50ead48SFabian Frederick return error; 218b3b94faaSDavid Teigland 219ed87dabcSEric W. Biederman qid = make_kqid(current_user_ns(), GRPQUOTA, id); 220ed87dabcSEric W. Biederman if (!qid_valid(qid)) 221ed87dabcSEric W. Biederman return -EINVAL; 222ed87dabcSEric W. Biederman 223ed87dabcSEric W. Biederman error = gfs2_quota_refresh(sdp, qid); 224ea762338SSteven Whitehouse return error ? error : len; 225b3b94faaSDavid Teigland } 226b3b94faaSDavid Teigland 22764d576baSSteven Whitehouse static ssize_t demote_rq_store(struct gfs2_sbd *sdp, const char *buf, size_t len) 22864d576baSSteven Whitehouse { 22964d576baSSteven Whitehouse struct gfs2_glock *gl; 23064d576baSSteven Whitehouse const struct gfs2_glock_operations *glops; 23164d576baSSteven Whitehouse unsigned int glmode; 23264d576baSSteven Whitehouse unsigned int gltype; 23364d576baSSteven Whitehouse unsigned long long glnum; 23464d576baSSteven Whitehouse char mode[16]; 23564d576baSSteven Whitehouse int rv; 23664d576baSSteven Whitehouse 23764d576baSSteven Whitehouse if (!capable(CAP_SYS_ADMIN)) 23841735818SZhao Hongjiang return -EPERM; 23964d576baSSteven Whitehouse 24064d576baSSteven Whitehouse rv = sscanf(buf, "%u:%llu %15s", &gltype, &glnum, 24164d576baSSteven Whitehouse mode); 24264d576baSSteven Whitehouse if (rv != 3) 24364d576baSSteven Whitehouse return -EINVAL; 24464d576baSSteven Whitehouse 24564d576baSSteven Whitehouse if (strcmp(mode, "EX") == 0) 24664d576baSSteven Whitehouse glmode = LM_ST_UNLOCKED; 24764d576baSSteven Whitehouse else if ((strcmp(mode, "CW") == 0) || (strcmp(mode, "DF") == 0)) 24864d576baSSteven Whitehouse glmode = LM_ST_DEFERRED; 24964d576baSSteven Whitehouse else if ((strcmp(mode, "PR") == 0) || (strcmp(mode, "SH") == 0)) 25064d576baSSteven Whitehouse glmode = LM_ST_SHARED; 25164d576baSSteven Whitehouse else 25264d576baSSteven Whitehouse return -EINVAL; 25364d576baSSteven Whitehouse 25464d576baSSteven Whitehouse if (gltype > LM_TYPE_JOURNAL) 25564d576baSSteven Whitehouse return -EINVAL; 25624972557SBenjamin Marzinski if (gltype == LM_TYPE_NONDISK && glnum == GFS2_FREEZE_LOCK) 25724972557SBenjamin Marzinski glops = &gfs2_freeze_glops; 25813466985SSteven Whitehouse else 25964d576baSSteven Whitehouse glops = gfs2_glops_list[gltype]; 26064d576baSSteven Whitehouse if (glops == NULL) 26164d576baSSteven Whitehouse return -EINVAL; 2626a99be5dSSteven Whitehouse if (!test_and_set_bit(SDF_DEMOTE, &sdp->sd_flags)) 263913a71d2SSteven Whitehouse fs_info(sdp, "demote interface used\n"); 26464d576baSSteven Whitehouse rv = gfs2_glock_get(sdp, glnum, glops, 0, &gl); 26564d576baSSteven Whitehouse if (rv) 26664d576baSSteven Whitehouse return rv; 26764d576baSSteven Whitehouse gfs2_glock_cb(gl, glmode); 26864d576baSSteven Whitehouse gfs2_glock_put(gl); 26964d576baSSteven Whitehouse return len; 27064d576baSSteven Whitehouse } 27164d576baSSteven Whitehouse 272b3b94faaSDavid Teigland 273b3b94faaSDavid Teigland #define GFS2_ATTR(name, mode, show, store) \ 274b3b94faaSDavid Teigland static struct gfs2_attr gfs2_attr_##name = __ATTR(name, mode, show, store) 275b3b94faaSDavid Teigland 276b3b94faaSDavid Teigland GFS2_ATTR(id, 0444, id_show, NULL); 277b3b94faaSDavid Teigland GFS2_ATTR(fsname, 0444, fsname_show, NULL); 27802e3cc70SSteven Whitehouse GFS2_ATTR(uuid, 0444, uuid_show, NULL); 279b3b94faaSDavid Teigland GFS2_ATTR(freeze, 0644, freeze_show, freeze_store); 280b3b94faaSDavid Teigland GFS2_ATTR(withdraw, 0644, withdraw_show, withdraw_store); 281b3b94faaSDavid Teigland GFS2_ATTR(statfs_sync, 0200, NULL, statfs_sync_store); 282b3b94faaSDavid Teigland GFS2_ATTR(quota_sync, 0200, NULL, quota_sync_store); 283b3b94faaSDavid Teigland GFS2_ATTR(quota_refresh_user, 0200, NULL, quota_refresh_user_store); 284b3b94faaSDavid Teigland GFS2_ATTR(quota_refresh_group, 0200, NULL, quota_refresh_group_store); 28564d576baSSteven Whitehouse GFS2_ATTR(demote_rq, 0200, NULL, demote_rq_store); 286b3b94faaSDavid Teigland 287b3b94faaSDavid Teigland static struct attribute *gfs2_attrs[] = { 288b3b94faaSDavid Teigland &gfs2_attr_id.attr, 289b3b94faaSDavid Teigland &gfs2_attr_fsname.attr, 29002e3cc70SSteven Whitehouse &gfs2_attr_uuid.attr, 291b3b94faaSDavid Teigland &gfs2_attr_freeze.attr, 292b3b94faaSDavid Teigland &gfs2_attr_withdraw.attr, 293b3b94faaSDavid Teigland &gfs2_attr_statfs_sync.attr, 294b3b94faaSDavid Teigland &gfs2_attr_quota_sync.attr, 295b3b94faaSDavid Teigland &gfs2_attr_quota_refresh_user.attr, 296b3b94faaSDavid Teigland &gfs2_attr_quota_refresh_group.attr, 29764d576baSSteven Whitehouse &gfs2_attr_demote_rq.attr, 298b3b94faaSDavid Teigland NULL, 299b3b94faaSDavid Teigland }; 300ef254d13SKimberly Brown ATTRIBUTE_GROUPS(gfs2); 301b3b94faaSDavid Teigland 3020d515210SBob Peterson static void gfs2_sbd_release(struct kobject *kobj) 3030d515210SBob Peterson { 3040d515210SBob Peterson struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj); 3050d515210SBob Peterson 3062a27b755SAndreas Gruenbacher free_sbd(sdp); 3070d515210SBob Peterson } 3080d515210SBob Peterson 309b3b94faaSDavid Teigland static struct kobj_type gfs2_ktype = { 3100d515210SBob Peterson .release = gfs2_sbd_release, 311ef254d13SKimberly Brown .default_groups = gfs2_groups, 312b3b94faaSDavid Teigland .sysfs_ops = &gfs2_attr_ops, 313b3b94faaSDavid Teigland }; 314b3b94faaSDavid Teigland 315f057f6cdSSteven Whitehouse 316f057f6cdSSteven Whitehouse /* 317f057f6cdSSteven Whitehouse * lock_module. Originally from lock_dlm 318f057f6cdSSteven Whitehouse */ 319f057f6cdSSteven Whitehouse 320f057f6cdSSteven Whitehouse static ssize_t proto_name_show(struct gfs2_sbd *sdp, char *buf) 321f057f6cdSSteven Whitehouse { 322f057f6cdSSteven Whitehouse const struct lm_lockops *ops = sdp->sd_lockstruct.ls_ops; 323f057f6cdSSteven Whitehouse return sprintf(buf, "%s\n", ops->lm_proto_name); 324f057f6cdSSteven Whitehouse } 325f057f6cdSSteven Whitehouse 326f057f6cdSSteven Whitehouse static ssize_t block_show(struct gfs2_sbd *sdp, char *buf) 327f057f6cdSSteven Whitehouse { 328f057f6cdSSteven Whitehouse struct lm_lockstruct *ls = &sdp->sd_lockstruct; 329f057f6cdSSteven Whitehouse ssize_t ret; 330f057f6cdSSteven Whitehouse int val = 0; 331f057f6cdSSteven Whitehouse 332e0c2a9aaSDavid Teigland if (test_bit(DFL_BLOCK_LOCKS, &ls->ls_recover_flags)) 333f057f6cdSSteven Whitehouse val = 1; 334f057f6cdSSteven Whitehouse ret = sprintf(buf, "%d\n", val); 335f057f6cdSSteven Whitehouse return ret; 336f057f6cdSSteven Whitehouse } 337f057f6cdSSteven Whitehouse 338f057f6cdSSteven Whitehouse static ssize_t block_store(struct gfs2_sbd *sdp, const char *buf, size_t len) 339f057f6cdSSteven Whitehouse { 340f057f6cdSSteven Whitehouse struct lm_lockstruct *ls = &sdp->sd_lockstruct; 341e50ead48SFabian Frederick int ret, val; 342f057f6cdSSteven Whitehouse 343e50ead48SFabian Frederick ret = kstrtoint(buf, 0, &val); 344e50ead48SFabian Frederick if (ret) 345e50ead48SFabian Frederick return ret; 346f057f6cdSSteven Whitehouse 347f057f6cdSSteven Whitehouse if (val == 1) 348e0c2a9aaSDavid Teigland set_bit(DFL_BLOCK_LOCKS, &ls->ls_recover_flags); 349f057f6cdSSteven Whitehouse else if (val == 0) { 350e0c2a9aaSDavid Teigland clear_bit(DFL_BLOCK_LOCKS, &ls->ls_recover_flags); 3514e857c58SPeter Zijlstra smp_mb__after_atomic(); 352f057f6cdSSteven Whitehouse gfs2_glock_thaw(sdp); 353f057f6cdSSteven Whitehouse } else { 354e50ead48SFabian Frederick return -EINVAL; 355f057f6cdSSteven Whitehouse } 356e50ead48SFabian Frederick return len; 357f057f6cdSSteven Whitehouse } 358f057f6cdSSteven Whitehouse 359fd95e81cSSteven Whitehouse static ssize_t wdack_show(struct gfs2_sbd *sdp, char *buf) 360fd95e81cSSteven Whitehouse { 361fd95e81cSSteven Whitehouse int val = completion_done(&sdp->sd_wdack) ? 1 : 0; 362fd95e81cSSteven Whitehouse 363fd95e81cSSteven Whitehouse return sprintf(buf, "%d\n", val); 364fd95e81cSSteven Whitehouse } 365fd95e81cSSteven Whitehouse 366fd95e81cSSteven Whitehouse static ssize_t wdack_store(struct gfs2_sbd *sdp, const char *buf, size_t len) 367fd95e81cSSteven Whitehouse { 368e50ead48SFabian Frederick int ret, val; 369fd95e81cSSteven Whitehouse 370e50ead48SFabian Frederick ret = kstrtoint(buf, 0, &val); 371e50ead48SFabian Frederick if (ret) 372e50ead48SFabian Frederick return ret; 373fd95e81cSSteven Whitehouse 374fd95e81cSSteven Whitehouse if ((val == 1) && 375fd95e81cSSteven Whitehouse !strcmp(sdp->sd_lockstruct.ls_ops->lm_proto_name, "lock_dlm")) 376fd95e81cSSteven Whitehouse complete(&sdp->sd_wdack); 377fd95e81cSSteven Whitehouse else 378e50ead48SFabian Frederick return -EINVAL; 379e50ead48SFabian Frederick return len; 380fd95e81cSSteven Whitehouse } 381fd95e81cSSteven Whitehouse 382f057f6cdSSteven Whitehouse static ssize_t lkfirst_show(struct gfs2_sbd *sdp, char *buf) 383f057f6cdSSteven Whitehouse { 384f057f6cdSSteven Whitehouse struct lm_lockstruct *ls = &sdp->sd_lockstruct; 385f057f6cdSSteven Whitehouse return sprintf(buf, "%d\n", ls->ls_first); 386f057f6cdSSteven Whitehouse } 387f057f6cdSSteven Whitehouse 388ba6e9364SSteven Whitehouse static ssize_t lkfirst_store(struct gfs2_sbd *sdp, const char *buf, size_t len) 389ba6e9364SSteven Whitehouse { 390ba6e9364SSteven Whitehouse unsigned first; 391ba6e9364SSteven Whitehouse int rv; 392ba6e9364SSteven Whitehouse 393ba6e9364SSteven Whitehouse rv = sscanf(buf, "%u", &first); 394ba6e9364SSteven Whitehouse if (rv != 1 || first > 1) 395ba6e9364SSteven Whitehouse return -EINVAL; 3963942ae53SSteven Whitehouse rv = wait_for_completion_killable(&sdp->sd_locking_init); 3973942ae53SSteven Whitehouse if (rv) 3983942ae53SSteven Whitehouse return rv; 399ba6e9364SSteven Whitehouse spin_lock(&sdp->sd_jindex_spin); 400ba6e9364SSteven Whitehouse rv = -EBUSY; 401ba6e9364SSteven Whitehouse if (test_bit(SDF_NOJOURNALID, &sdp->sd_flags) == 0) 402ba6e9364SSteven Whitehouse goto out; 403ba6e9364SSteven Whitehouse rv = -EINVAL; 404ba6e9364SSteven Whitehouse if (sdp->sd_args.ar_spectator) 405ba6e9364SSteven Whitehouse goto out; 406ba6e9364SSteven Whitehouse if (sdp->sd_lockstruct.ls_ops->lm_mount == NULL) 407ba6e9364SSteven Whitehouse goto out; 408ba6e9364SSteven Whitehouse sdp->sd_lockstruct.ls_first = first; 409ba6e9364SSteven Whitehouse rv = 0; 410ba6e9364SSteven Whitehouse out: 411ba6e9364SSteven Whitehouse spin_unlock(&sdp->sd_jindex_spin); 412ba6e9364SSteven Whitehouse return rv ? rv : len; 413ba6e9364SSteven Whitehouse } 414ba6e9364SSteven Whitehouse 415f057f6cdSSteven Whitehouse static ssize_t first_done_show(struct gfs2_sbd *sdp, char *buf) 416f057f6cdSSteven Whitehouse { 417f057f6cdSSteven Whitehouse struct lm_lockstruct *ls = &sdp->sd_lockstruct; 418e0c2a9aaSDavid Teigland return sprintf(buf, "%d\n", !!test_bit(DFL_FIRST_MOUNT_DONE, &ls->ls_recover_flags)); 419f057f6cdSSteven Whitehouse } 420f057f6cdSSteven Whitehouse 421e0c2a9aaSDavid Teigland int gfs2_recover_set(struct gfs2_sbd *sdp, unsigned jid) 422f057f6cdSSteven Whitehouse { 423f057f6cdSSteven Whitehouse struct gfs2_jdesc *jd; 424fe64d517SSteven Whitehouse int rv; 425f057f6cdSSteven Whitehouse 4260e48e055SBob Peterson /* Wait for our primary journal to be initialized */ 4270e48e055SBob Peterson wait_for_completion(&sdp->sd_journal_ready); 4280e48e055SBob Peterson 429f057f6cdSSteven Whitehouse spin_lock(&sdp->sd_jindex_spin); 430fe64d517SSteven Whitehouse rv = -EBUSY; 4314a772772SBob Peterson /** 4324a772772SBob Peterson * If we're a spectator, we use journal0, but it's not really ours. 4334a772772SBob Peterson * So we need to wait for its recovery too. If we skip it we'd never 4344a772772SBob Peterson * queue work to the recovery workqueue, and so its completion would 4354a772772SBob Peterson * never clear the DFL_BLOCK_LOCKS flag, so all our locks would 4364a772772SBob Peterson * permanently stop working. 4374a772772SBob Peterson */ 4384a772772SBob Peterson if (sdp->sd_jdesc->jd_jid == jid && !sdp->sd_args.ar_spectator) 439fe64d517SSteven Whitehouse goto out; 440fe64d517SSteven Whitehouse rv = -ENOENT; 441f057f6cdSSteven Whitehouse list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) { 4424a772772SBob Peterson if (jd->jd_jid != jid && !sdp->sd_args.ar_spectator) 443f057f6cdSSteven Whitehouse continue; 4446ecd7c2dSTejun Heo rv = gfs2_recover_journal(jd, false); 445f057f6cdSSteven Whitehouse break; 446f057f6cdSSteven Whitehouse } 447fe64d517SSteven Whitehouse out: 448f057f6cdSSteven Whitehouse spin_unlock(&sdp->sd_jindex_spin); 449e0c2a9aaSDavid Teigland return rv; 450e0c2a9aaSDavid Teigland } 451e0c2a9aaSDavid Teigland 452e0c2a9aaSDavid Teigland static ssize_t recover_store(struct gfs2_sbd *sdp, const char *buf, size_t len) 453e0c2a9aaSDavid Teigland { 454e0c2a9aaSDavid Teigland unsigned jid; 455e0c2a9aaSDavid Teigland int rv; 456e0c2a9aaSDavid Teigland 457e0c2a9aaSDavid Teigland rv = sscanf(buf, "%u", &jid); 458e0c2a9aaSDavid Teigland if (rv != 1) 459e0c2a9aaSDavid Teigland return -EINVAL; 460e0c2a9aaSDavid Teigland 4611a058f52SDavid Teigland if (test_bit(SDF_NORECOVERY, &sdp->sd_flags)) { 4621a058f52SDavid Teigland rv = -ESHUTDOWN; 4631a058f52SDavid Teigland goto out; 4641a058f52SDavid Teigland } 465e0c2a9aaSDavid Teigland 4661a058f52SDavid Teigland rv = gfs2_recover_set(sdp, jid); 4671a058f52SDavid Teigland out: 468fe64d517SSteven Whitehouse return rv ? rv : len; 469f057f6cdSSteven Whitehouse } 470f057f6cdSSteven Whitehouse 471f057f6cdSSteven Whitehouse static ssize_t recover_done_show(struct gfs2_sbd *sdp, char *buf) 472f057f6cdSSteven Whitehouse { 473f057f6cdSSteven Whitehouse struct lm_lockstruct *ls = &sdp->sd_lockstruct; 474f057f6cdSSteven Whitehouse return sprintf(buf, "%d\n", ls->ls_recover_jid_done); 475f057f6cdSSteven Whitehouse } 476f057f6cdSSteven Whitehouse 477f057f6cdSSteven Whitehouse static ssize_t recover_status_show(struct gfs2_sbd *sdp, char *buf) 478f057f6cdSSteven Whitehouse { 479f057f6cdSSteven Whitehouse struct lm_lockstruct *ls = &sdp->sd_lockstruct; 480f057f6cdSSteven Whitehouse return sprintf(buf, "%d\n", ls->ls_recover_jid_status); 481f057f6cdSSteven Whitehouse } 482f057f6cdSSteven Whitehouse 483e1b28aabSSteven Whitehouse static ssize_t jid_show(struct gfs2_sbd *sdp, char *buf) 484e1b28aabSSteven Whitehouse { 485feb47ca9SSteven Whitehouse return sprintf(buf, "%d\n", sdp->sd_lockstruct.ls_jid); 486e1b28aabSSteven Whitehouse } 487e1b28aabSSteven Whitehouse 488ba6e9364SSteven Whitehouse static ssize_t jid_store(struct gfs2_sbd *sdp, const char *buf, size_t len) 489ba6e9364SSteven Whitehouse { 490feb47ca9SSteven Whitehouse int jid; 491ba6e9364SSteven Whitehouse int rv; 492ba6e9364SSteven Whitehouse 493feb47ca9SSteven Whitehouse rv = sscanf(buf, "%d", &jid); 494ba6e9364SSteven Whitehouse if (rv != 1) 495ba6e9364SSteven Whitehouse return -EINVAL; 4963942ae53SSteven Whitehouse rv = wait_for_completion_killable(&sdp->sd_locking_init); 4973942ae53SSteven Whitehouse if (rv) 4983942ae53SSteven Whitehouse return rv; 499ba6e9364SSteven Whitehouse spin_lock(&sdp->sd_jindex_spin); 500ba6e9364SSteven Whitehouse rv = -EINVAL; 501ba6e9364SSteven Whitehouse if (sdp->sd_lockstruct.ls_ops->lm_mount == NULL) 502ba6e9364SSteven Whitehouse goto out; 503ba6e9364SSteven Whitehouse rv = -EBUSY; 504feb47ca9SSteven Whitehouse if (test_bit(SDF_NOJOURNALID, &sdp->sd_flags) == 0) 505ba6e9364SSteven Whitehouse goto out; 506feb47ca9SSteven Whitehouse rv = 0; 507feb47ca9SSteven Whitehouse if (sdp->sd_args.ar_spectator && jid > 0) 508feb47ca9SSteven Whitehouse rv = jid = -EINVAL; 509ba6e9364SSteven Whitehouse sdp->sd_lockstruct.ls_jid = jid; 510feb47ca9SSteven Whitehouse clear_bit(SDF_NOJOURNALID, &sdp->sd_flags); 5114e857c58SPeter Zijlstra smp_mb__after_atomic(); 512ba6e9364SSteven Whitehouse wake_up_bit(&sdp->sd_flags, SDF_NOJOURNALID); 513ba6e9364SSteven Whitehouse out: 514ba6e9364SSteven Whitehouse spin_unlock(&sdp->sd_jindex_spin); 515ba6e9364SSteven Whitehouse return rv ? rv : len; 516ba6e9364SSteven Whitehouse } 517ba6e9364SSteven Whitehouse 518f057f6cdSSteven Whitehouse #define GDLM_ATTR(_name,_mode,_show,_store) \ 51948c2b613SSteven Whitehouse static struct gfs2_attr gdlm_attr_##_name = __ATTR(_name,_mode,_show,_store) 520f057f6cdSSteven Whitehouse 521f057f6cdSSteven Whitehouse GDLM_ATTR(proto_name, 0444, proto_name_show, NULL); 522f057f6cdSSteven Whitehouse GDLM_ATTR(block, 0644, block_show, block_store); 523fd95e81cSSteven Whitehouse GDLM_ATTR(withdraw, 0644, wdack_show, wdack_store); 524ba6e9364SSteven Whitehouse GDLM_ATTR(jid, 0644, jid_show, jid_store); 525ba6e9364SSteven Whitehouse GDLM_ATTR(first, 0644, lkfirst_show, lkfirst_store); 526f057f6cdSSteven Whitehouse GDLM_ATTR(first_done, 0444, first_done_show, NULL); 527d7e623daSSteven Whitehouse GDLM_ATTR(recover, 0600, NULL, recover_store); 528f057f6cdSSteven Whitehouse GDLM_ATTR(recover_done, 0444, recover_done_show, NULL); 529f057f6cdSSteven Whitehouse GDLM_ATTR(recover_status, 0444, recover_status_show, NULL); 530f057f6cdSSteven Whitehouse 531f057f6cdSSteven Whitehouse static struct attribute *lock_module_attrs[] = { 532f057f6cdSSteven Whitehouse &gdlm_attr_proto_name.attr, 533f057f6cdSSteven Whitehouse &gdlm_attr_block.attr, 534f057f6cdSSteven Whitehouse &gdlm_attr_withdraw.attr, 535e1b28aabSSteven Whitehouse &gdlm_attr_jid.attr, 536f057f6cdSSteven Whitehouse &gdlm_attr_first.attr, 537f057f6cdSSteven Whitehouse &gdlm_attr_first_done.attr, 538f057f6cdSSteven Whitehouse &gdlm_attr_recover.attr, 539f057f6cdSSteven Whitehouse &gdlm_attr_recover_done.attr, 540f057f6cdSSteven Whitehouse &gdlm_attr_recover_status.attr, 541ea67eedbSSteven Whitehouse NULL, 542b3b94faaSDavid Teigland }; 543b3b94faaSDavid Teigland 544b3b94faaSDavid Teigland /* 545b3b94faaSDavid Teigland * get and set struct gfs2_tune fields 546b3b94faaSDavid Teigland */ 547b3b94faaSDavid Teigland 548b3b94faaSDavid Teigland static ssize_t quota_scale_show(struct gfs2_sbd *sdp, char *buf) 549b3b94faaSDavid Teigland { 5503204a6c0SDavid Teigland return snprintf(buf, PAGE_SIZE, "%u %u\n", 5513204a6c0SDavid Teigland sdp->sd_tune.gt_quota_scale_num, 552b3b94faaSDavid Teigland sdp->sd_tune.gt_quota_scale_den); 553b3b94faaSDavid Teigland } 554b3b94faaSDavid Teigland 555b3b94faaSDavid Teigland static ssize_t quota_scale_store(struct gfs2_sbd *sdp, const char *buf, 556b3b94faaSDavid Teigland size_t len) 557b3b94faaSDavid Teigland { 558b3b94faaSDavid Teigland struct gfs2_tune *gt = &sdp->sd_tune; 559b3b94faaSDavid Teigland unsigned int x, y; 560b3b94faaSDavid Teigland 561b3b94faaSDavid Teigland if (!capable(CAP_SYS_ADMIN)) 56241735818SZhao Hongjiang return -EPERM; 563b3b94faaSDavid Teigland 564b3b94faaSDavid Teigland if (sscanf(buf, "%u %u", &x, &y) != 2 || !y) 565b3b94faaSDavid Teigland return -EINVAL; 566b3b94faaSDavid Teigland 567b3b94faaSDavid Teigland spin_lock(>->gt_spin); 568b3b94faaSDavid Teigland gt->gt_quota_scale_num = x; 569b3b94faaSDavid Teigland gt->gt_quota_scale_den = y; 570b3b94faaSDavid Teigland spin_unlock(>->gt_spin); 571b3b94faaSDavid Teigland return len; 572b3b94faaSDavid Teigland } 573b3b94faaSDavid Teigland 574b3b94faaSDavid Teigland static ssize_t tune_set(struct gfs2_sbd *sdp, unsigned int *field, 575b3b94faaSDavid Teigland int check_zero, const char *buf, size_t len) 576b3b94faaSDavid Teigland { 577b3b94faaSDavid Teigland struct gfs2_tune *gt = &sdp->sd_tune; 578b3b94faaSDavid Teigland unsigned int x; 579e50ead48SFabian Frederick int error; 580b3b94faaSDavid Teigland 581b3b94faaSDavid Teigland if (!capable(CAP_SYS_ADMIN)) 58241735818SZhao Hongjiang return -EPERM; 583b3b94faaSDavid Teigland 584e50ead48SFabian Frederick error = kstrtouint(buf, 0, &x); 585e50ead48SFabian Frederick if (error) 586e50ead48SFabian Frederick return error; 587b3b94faaSDavid Teigland 588b3b94faaSDavid Teigland if (check_zero && !x) 589b3b94faaSDavid Teigland return -EINVAL; 590b3b94faaSDavid Teigland 591b3b94faaSDavid Teigland spin_lock(>->gt_spin); 592b3b94faaSDavid Teigland *field = x; 593b3b94faaSDavid Teigland spin_unlock(>->gt_spin); 594b3b94faaSDavid Teigland return len; 595b3b94faaSDavid Teigland } 596b3b94faaSDavid Teigland 597b3b94faaSDavid Teigland #define TUNE_ATTR_3(name, show, store) \ 59848c2b613SSteven Whitehouse static struct gfs2_attr tune_attr_##name = __ATTR(name, 0644, show, store) 599b3b94faaSDavid Teigland 600b3b94faaSDavid Teigland #define TUNE_ATTR_2(name, store) \ 601b3b94faaSDavid Teigland static ssize_t name##_show(struct gfs2_sbd *sdp, char *buf) \ 602b3b94faaSDavid Teigland { \ 6033204a6c0SDavid Teigland return snprintf(buf, PAGE_SIZE, "%u\n", sdp->sd_tune.gt_##name); \ 604b3b94faaSDavid Teigland } \ 605b3b94faaSDavid Teigland TUNE_ATTR_3(name, name##_show, store) 606b3b94faaSDavid Teigland 607b3b94faaSDavid Teigland #define TUNE_ATTR(name, check_zero) \ 608b3b94faaSDavid Teigland static ssize_t name##_store(struct gfs2_sbd *sdp, const char *buf, size_t len)\ 609b3b94faaSDavid Teigland { \ 610b3b94faaSDavid Teigland return tune_set(sdp, &sdp->sd_tune.gt_##name, check_zero, buf, len); \ 611b3b94faaSDavid Teigland } \ 612b3b94faaSDavid Teigland TUNE_ATTR_2(name, name##_store) 613b3b94faaSDavid Teigland 614b3b94faaSDavid Teigland TUNE_ATTR(quota_warn_period, 0); 615b3b94faaSDavid Teigland TUNE_ATTR(quota_quantum, 0); 616b3b94faaSDavid Teigland TUNE_ATTR(max_readahead, 0); 617b3b94faaSDavid Teigland TUNE_ATTR(complain_secs, 0); 618b3b94faaSDavid Teigland TUNE_ATTR(statfs_slow, 0); 619b3b94faaSDavid Teigland TUNE_ATTR(new_files_jdata, 0); 620b3b94faaSDavid Teigland TUNE_ATTR(statfs_quantum, 1); 621b3b94faaSDavid Teigland TUNE_ATTR_3(quota_scale, quota_scale_show, quota_scale_store); 622b3b94faaSDavid Teigland 623b3b94faaSDavid Teigland static struct attribute *tune_attrs[] = { 624b3b94faaSDavid Teigland &tune_attr_quota_warn_period.attr, 625b3b94faaSDavid Teigland &tune_attr_quota_quantum.attr, 626b3b94faaSDavid Teigland &tune_attr_max_readahead.attr, 627b3b94faaSDavid Teigland &tune_attr_complain_secs.attr, 628b3b94faaSDavid Teigland &tune_attr_statfs_slow.attr, 629b3b94faaSDavid Teigland &tune_attr_statfs_quantum.attr, 630b3b94faaSDavid Teigland &tune_attr_quota_scale.attr, 631b3b94faaSDavid Teigland &tune_attr_new_files_jdata.attr, 632ea67eedbSSteven Whitehouse NULL, 633b3b94faaSDavid Teigland }; 634b3b94faaSDavid Teigland 63529695254SArvind Yadav static const struct attribute_group tune_group = { 636b3b94faaSDavid Teigland .name = "tune", 637ea67eedbSSteven Whitehouse .attrs = tune_attrs, 638b3b94faaSDavid Teigland }; 639b3b94faaSDavid Teigland 64029695254SArvind Yadav static const struct attribute_group lock_module_group = { 641f057f6cdSSteven Whitehouse .name = "lock_module", 642f057f6cdSSteven Whitehouse .attrs = lock_module_attrs, 643f057f6cdSSteven Whitehouse }; 644f057f6cdSSteven Whitehouse 645b3b94faaSDavid Teigland int gfs2_sys_fs_add(struct gfs2_sbd *sdp) 646b3b94faaSDavid Teigland { 647440d6da2SSteven Whitehouse struct super_block *sb = sdp->sd_vfs; 648b3b94faaSDavid Teigland int error; 649440d6da2SSteven Whitehouse char ro[20]; 650440d6da2SSteven Whitehouse char spectator[20]; 651440d6da2SSteven Whitehouse char *envp[] = { ro, spectator, NULL }; 652440d6da2SSteven Whitehouse 653bc98a42cSDavid Howells sprintf(ro, "RDONLY=%d", sb_rdonly(sb)); 654440d6da2SSteven Whitehouse sprintf(spectator, "SPECTATOR=%d", sdp->sd_args.ar_spectator ? 1 : 0); 655b3b94faaSDavid Teigland 6569bec101aSGreg Kroah-Hartman sdp->sd_kobj.kset = gfs2_kset; 657901195edSGreg Kroah-Hartman error = kobject_init_and_add(&sdp->sd_kobj, &gfs2_ktype, NULL, 658901195edSGreg Kroah-Hartman "%s", sdp->sd_table_name); 659b3b94faaSDavid Teigland if (error) 6600d515210SBob Peterson goto fail_reg; 661b3b94faaSDavid Teigland 662b3b94faaSDavid Teigland error = sysfs_create_group(&sdp->sd_kobj, &tune_group); 663b3b94faaSDavid Teigland if (error) 664f6eb5349SSteven Whitehouse goto fail_reg; 665b3b94faaSDavid Teigland 666f057f6cdSSteven Whitehouse error = sysfs_create_group(&sdp->sd_kobj, &lock_module_group); 667f057f6cdSSteven Whitehouse if (error) 668f057f6cdSSteven Whitehouse goto fail_tune; 669f057f6cdSSteven Whitehouse 67031e54b01SSteven Whitehouse error = sysfs_create_link(&sdp->sd_kobj, 67131e54b01SSteven Whitehouse &disk_to_dev(sb->s_bdev->bd_disk)->kobj, 67231e54b01SSteven Whitehouse "device"); 67331e54b01SSteven Whitehouse if (error) 67431e54b01SSteven Whitehouse goto fail_lock_module; 67531e54b01SSteven Whitehouse 676440d6da2SSteven Whitehouse kobject_uevent_env(&sdp->sd_kobj, KOBJ_ADD, envp); 677b3b94faaSDavid Teigland return 0; 678b3b94faaSDavid Teigland 67931e54b01SSteven Whitehouse fail_lock_module: 68031e54b01SSteven Whitehouse sysfs_remove_group(&sdp->sd_kobj, &lock_module_group); 681f057f6cdSSteven Whitehouse fail_tune: 682f057f6cdSSteven Whitehouse sysfs_remove_group(&sdp->sd_kobj, &tune_group); 683b3b94faaSDavid Teigland fail_reg: 684af38816eSAndreas Gruenbacher fs_err(sdp, "error %d adding sysfs files\n", error); 6850d515210SBob Peterson kobject_put(&sdp->sd_kobj); 6860d515210SBob Peterson sb->s_fs_info = NULL; 687b3b94faaSDavid Teigland return error; 688b3b94faaSDavid Teigland } 689b3b94faaSDavid Teigland 690b3b94faaSDavid Teigland void gfs2_sys_fs_del(struct gfs2_sbd *sdp) 691b3b94faaSDavid Teigland { 69231e54b01SSteven Whitehouse sysfs_remove_link(&sdp->sd_kobj, "device"); 693b3b94faaSDavid Teigland sysfs_remove_group(&sdp->sd_kobj, &tune_group); 694f057f6cdSSteven Whitehouse sysfs_remove_group(&sdp->sd_kobj, &lock_module_group); 695197b12d6SGreg Kroah-Hartman kobject_put(&sdp->sd_kobj); 696b3b94faaSDavid Teigland } 697b3b94faaSDavid Teigland 698fdd1062eSSteven Whitehouse static int gfs2_uevent(struct kset *kset, struct kobject *kobj, 699fdd1062eSSteven Whitehouse struct kobj_uevent_env *env) 700fdd1062eSSteven Whitehouse { 701fdd1062eSSteven Whitehouse struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj); 70232e471efSSteven Whitehouse struct super_block *s = sdp->sd_vfs; 70302e3cc70SSteven Whitehouse 704fdd1062eSSteven Whitehouse add_uevent_var(env, "LOCKTABLE=%s", sdp->sd_table_name); 705fdd1062eSSteven Whitehouse add_uevent_var(env, "LOCKPROTO=%s", sdp->sd_proto_name); 706ba6e9364SSteven Whitehouse if (!test_bit(SDF_NOJOURNALID, &sdp->sd_flags)) 707feb47ca9SSteven Whitehouse add_uevent_var(env, "JOURNALID=%d", sdp->sd_lockstruct.ls_jid); 70885787090SChristoph Hellwig if (!uuid_is_null(&s->s_uuid)) 70985787090SChristoph Hellwig add_uevent_var(env, "UUID=%pUB", &s->s_uuid); 710fdd1062eSSteven Whitehouse return 0; 711fdd1062eSSteven Whitehouse } 712fdd1062eSSteven Whitehouse 7139cd43611SEmese Revfy static const struct kset_uevent_ops gfs2_uevent_ops = { 714fdd1062eSSteven Whitehouse .uevent = gfs2_uevent, 715fdd1062eSSteven Whitehouse }; 716fdd1062eSSteven Whitehouse 717b3b94faaSDavid Teigland int gfs2_sys_init(void) 718b3b94faaSDavid Teigland { 719fdd1062eSSteven Whitehouse gfs2_kset = kset_create_and_add("gfs2", &gfs2_uevent_ops, fs_kobj); 7209bec101aSGreg Kroah-Hartman if (!gfs2_kset) 7219bec101aSGreg Kroah-Hartman return -ENOMEM; 7229bec101aSGreg Kroah-Hartman return 0; 723b3b94faaSDavid Teigland } 724b3b94faaSDavid Teigland 725b3b94faaSDavid Teigland void gfs2_sys_uninit(void) 726b3b94faaSDavid Teigland { 7279bec101aSGreg Kroah-Hartman kset_unregister(gfs2_kset); 728b3b94faaSDavid Teigland } 729b3b94faaSDavid Teigland 730