--- /dev/null
+/*
+ * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
+ * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
+ *
+ * This copyrighted material is made available to anyone wishing to use,
+ * modify, copy, or redistribute it subject to the terms and conditions
+ * of the GNU General Public License version 2.
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/sched.h>
+#include <linux/spinlock.h>
+#include <linux/completion.h>
+#include <linux/buffer_head.h>
+#include <linux/module.h>
+#include <linux/kobject.h>
+#include <asm/uaccess.h>
+#include <linux/gfs2_ondisk.h>
+#include <linux/genhd.h>
+
+#include "gfs2.h"
+#include "incore.h"
+#include "sys.h"
+#include "super.h"
+#include "glock.h"
+#include "quota.h"
+#include "util.h"
+#include "glops.h"
+#include "recovery.h"
+
+struct gfs2_attr {
+ struct attribute attr;
+ ssize_t (*show)(struct gfs2_sbd *, char *);
+ ssize_t (*store)(struct gfs2_sbd *, const char *, size_t);
+};
+
+static ssize_t gfs2_attr_show(struct kobject *kobj, struct attribute *attr,
+ char *buf)
+{
+ struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj);
+ struct gfs2_attr *a = container_of(attr, struct gfs2_attr, attr);
+ return a->show ? a->show(sdp, buf) : 0;
+}
+
+static ssize_t gfs2_attr_store(struct kobject *kobj, struct attribute *attr,
+ const char *buf, size_t len)
+{
+ struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj);
+ struct gfs2_attr *a = container_of(attr, struct gfs2_attr, attr);
+ return a->store ? a->store(sdp, buf, len) : len;
+}
+
+static const struct sysfs_ops gfs2_attr_ops = {
+ .show = gfs2_attr_show,
+ .store = gfs2_attr_store,
+};
+
+
+static struct kset *gfs2_kset;
+
+static ssize_t id_show(struct gfs2_sbd *sdp, char *buf)
+{
+ return snprintf(buf, PAGE_SIZE, "%u:%u\n",
+ MAJOR(sdp->sd_vfs->s_dev), MINOR(sdp->sd_vfs->s_dev));
+}
+
+static ssize_t fsname_show(struct gfs2_sbd *sdp, char *buf)
+{
+ return snprintf(buf, PAGE_SIZE, "%s\n", sdp->sd_fsname);
+}
+
+static int gfs2_uuid_valid(const u8 *uuid)
+{
+ int i;
+
+ for (i = 0; i < 16; i++) {
+ if (uuid[i])
+ return 1;
+ }
+ return 0;
+}
+
+static ssize_t uuid_show(struct gfs2_sbd *sdp, char *buf)
+{
+ struct super_block *s = sdp->sd_vfs;
+ const u8 *uuid = s->s_uuid;
+ buf[0] = '\0';
+ if (!gfs2_uuid_valid(uuid))
+ return 0;
+ return snprintf(buf, PAGE_SIZE, "%pUB\n", uuid);
+}
+
+static ssize_t freeze_show(struct gfs2_sbd *sdp, char *buf)
+{
+ struct super_block *sb = sdp->sd_vfs;
+ int frozen = (sb->s_writers.frozen == SB_UNFROZEN) ? 0 : 1;
+
+ return snprintf(buf, PAGE_SIZE, "%d\n", frozen);
+}
+
+static ssize_t freeze_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
+{
+ int error;
+ int n = simple_strtol(buf, NULL, 0);
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+
+ switch (n) {
+ case 0:
+ error = thaw_super(sdp->sd_vfs);
+ break;
+ case 1:
+ error = freeze_super(sdp->sd_vfs);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ if (error) {
+ fs_warn(sdp, "freeze %d error %d", n, error);
+ return error;
+ }
+
+ return len;
+}
+
+static ssize_t withdraw_show(struct gfs2_sbd *sdp, char *buf)
+{
+ unsigned int b = test_bit(SDF_SHUTDOWN, &sdp->sd_flags);
+ return snprintf(buf, PAGE_SIZE, "%u\n", b);
+}
+
+static ssize_t withdraw_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
+{
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+
+ if (simple_strtol(buf, NULL, 0) != 1)
+ return -EINVAL;
+
+ gfs2_lm_withdraw(sdp, "withdrawing from cluster at user's request\n");
+
+ return len;
+}
+
+static ssize_t statfs_sync_store(struct gfs2_sbd *sdp, const char *buf,
+ size_t len)
+{
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+
+ if (simple_strtol(buf, NULL, 0) != 1)
+ return -EINVAL;
+
+ gfs2_statfs_sync(sdp->sd_vfs, 0);
+ return len;
+}
+
+static ssize_t quota_sync_store(struct gfs2_sbd *sdp, const char *buf,
+ size_t len)
+{
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+
+ if (simple_strtol(buf, NULL, 0) != 1)
+ return -EINVAL;
+
+ gfs2_quota_sync(sdp->sd_vfs, 0);
+ return len;
+}
+
+static ssize_t quota_refresh_user_store(struct gfs2_sbd *sdp, const char *buf,
+ size_t len)
+{
+ struct kqid qid;
+ int error;
+ u32 id;
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+
+ id = simple_strtoul(buf, NULL, 0);
+
+ qid = make_kqid(current_user_ns(), USRQUOTA, id);
+ if (!qid_valid(qid))
+ return -EINVAL;
+
+ error = gfs2_quota_refresh(sdp, qid);
+ return error ? error : len;
+}
+
+static ssize_t quota_refresh_group_store(struct gfs2_sbd *sdp, const char *buf,
+ size_t len)
+{
+ struct kqid qid;
+ int error;
+ u32 id;
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+
+ id = simple_strtoul(buf, NULL, 0);
+
+ qid = make_kqid(current_user_ns(), GRPQUOTA, id);
+ if (!qid_valid(qid))
+ return -EINVAL;
+
+ error = gfs2_quota_refresh(sdp, qid);
+ return error ? error : len;
+}
+
+static ssize_t demote_rq_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
+{
+ struct gfs2_glock *gl;
+ const struct gfs2_glock_operations *glops;
+ unsigned int glmode;
+ unsigned int gltype;
+ unsigned long long glnum;
+ char mode[16];
+ int rv;
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+
+ rv = sscanf(buf, "%u:%llu %15s", &gltype, &glnum,
+ mode);
+ if (rv != 3)
+ return -EINVAL;
+
+ if (strcmp(mode, "EX") == 0)
+ glmode = LM_ST_UNLOCKED;
+ else if ((strcmp(mode, "CW") == 0) || (strcmp(mode, "DF") == 0))
+ glmode = LM_ST_DEFERRED;
+ else if ((strcmp(mode, "PR") == 0) || (strcmp(mode, "SH") == 0))
+ glmode = LM_ST_SHARED;
+ else
+ return -EINVAL;
+
+ if (gltype > LM_TYPE_JOURNAL)
+ return -EINVAL;
+ if (gltype == LM_TYPE_NONDISK && glnum == GFS2_FREEZE_LOCK)
+ glops = &gfs2_freeze_glops;
+ else
+ glops = gfs2_glops_list[gltype];
+ if (glops == NULL)
+ return -EINVAL;
+ if (!test_and_set_bit(SDF_DEMOTE, &sdp->sd_flags))
+ fs_info(sdp, "demote interface used\n");
+ rv = gfs2_glock_get(sdp, glnum, glops, 0, &gl);
+ if (rv)
+ return rv;
+ gfs2_glock_cb(gl, glmode);
+ gfs2_glock_put(gl);
+ return len;
+}
+
+
+#define GFS2_ATTR(name, mode, show, store) \
+static struct gfs2_attr gfs2_attr_##name = __ATTR(name, mode, show, store)
+
+GFS2_ATTR(id, 0444, id_show, NULL);
+GFS2_ATTR(fsname, 0444, fsname_show, NULL);
+GFS2_ATTR(uuid, 0444, uuid_show, NULL);
+GFS2_ATTR(freeze, 0644, freeze_show, freeze_store);
+GFS2_ATTR(withdraw, 0644, withdraw_show, withdraw_store);
+GFS2_ATTR(statfs_sync, 0200, NULL, statfs_sync_store);
+GFS2_ATTR(quota_sync, 0200, NULL, quota_sync_store);
+GFS2_ATTR(quota_refresh_user, 0200, NULL, quota_refresh_user_store);
+GFS2_ATTR(quota_refresh_group, 0200, NULL, quota_refresh_group_store);
+GFS2_ATTR(demote_rq, 0200, NULL, demote_rq_store);
+
+static struct attribute *gfs2_attrs[] = {
+ &gfs2_attr_id.attr,
+ &gfs2_attr_fsname.attr,
+ &gfs2_attr_uuid.attr,
+ &gfs2_attr_freeze.attr,
+ &gfs2_attr_withdraw.attr,
+ &gfs2_attr_statfs_sync.attr,
+ &gfs2_attr_quota_sync.attr,
+ &gfs2_attr_quota_refresh_user.attr,
+ &gfs2_attr_quota_refresh_group.attr,
+ &gfs2_attr_demote_rq.attr,
+ NULL,
+};
+
+static void gfs2_sbd_release(struct kobject *kobj)
+{
+ struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj);
+
+ kfree(sdp);
+}
+
+static struct kobj_type gfs2_ktype = {
+ .release = gfs2_sbd_release,
+ .default_attrs = gfs2_attrs,
+ .sysfs_ops = &gfs2_attr_ops,
+};
+
+
+/*
+ * lock_module. Originally from lock_dlm
+ */
+
+static ssize_t proto_name_show(struct gfs2_sbd *sdp, char *buf)
+{
+ const struct lm_lockops *ops = sdp->sd_lockstruct.ls_ops;
+ return sprintf(buf, "%s\n", ops->lm_proto_name);
+}
+
+static ssize_t block_show(struct gfs2_sbd *sdp, char *buf)
+{
+ struct lm_lockstruct *ls = &sdp->sd_lockstruct;
+ ssize_t ret;
+ int val = 0;
+
+ if (test_bit(DFL_BLOCK_LOCKS, &ls->ls_recover_flags))
+ val = 1;
+ ret = sprintf(buf, "%d\n", val);
+ return ret;
+}
+
+static ssize_t block_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
+{
+ struct lm_lockstruct *ls = &sdp->sd_lockstruct;
+ ssize_t ret = len;
+ int val;
+
+ val = simple_strtol(buf, NULL, 0);
+
+ if (val == 1)
+ set_bit(DFL_BLOCK_LOCKS, &ls->ls_recover_flags);
+ else if (val == 0) {
+ clear_bit(DFL_BLOCK_LOCKS, &ls->ls_recover_flags);
+ smp_mb__after_atomic();
+ gfs2_glock_thaw(sdp);
+ } else {
+ ret = -EINVAL;
+ }
+ return ret;
+}
+
+static ssize_t wdack_show(struct gfs2_sbd *sdp, char *buf)
+{
+ int val = completion_done(&sdp->sd_wdack) ? 1 : 0;
+
+ return sprintf(buf, "%d\n", val);
+}
+
+static ssize_t wdack_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
+{
+ ssize_t ret = len;
+ int val;
+
+ val = simple_strtol(buf, NULL, 0);
+
+ if ((val == 1) &&
+ !strcmp(sdp->sd_lockstruct.ls_ops->lm_proto_name, "lock_dlm"))
+ complete(&sdp->sd_wdack);
+ else
+ ret = -EINVAL;
+ return ret;
+}
+
+static ssize_t lkfirst_show(struct gfs2_sbd *sdp, char *buf)
+{
+ struct lm_lockstruct *ls = &sdp->sd_lockstruct;
+ return sprintf(buf, "%d\n", ls->ls_first);
+}
+
+static ssize_t lkfirst_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
+{
+ unsigned first;
+ int rv;
+
+ rv = sscanf(buf, "%u", &first);
+ if (rv != 1 || first > 1)
+ return -EINVAL;
+ rv = wait_for_completion_killable(&sdp->sd_locking_init);
+ if (rv)
+ return rv;
+ spin_lock(&sdp->sd_jindex_spin);
+ rv = -EBUSY;
+ if (test_bit(SDF_NOJOURNALID, &sdp->sd_flags) == 0)
+ goto out;
+ rv = -EINVAL;
+ if (sdp->sd_args.ar_spectator)
+ goto out;
+ if (sdp->sd_lockstruct.ls_ops->lm_mount == NULL)
+ goto out;
+ sdp->sd_lockstruct.ls_first = first;
+ rv = 0;
+out:
+ spin_unlock(&sdp->sd_jindex_spin);
+ return rv ? rv : len;
+}
+
+static ssize_t first_done_show(struct gfs2_sbd *sdp, char *buf)
+{
+ struct lm_lockstruct *ls = &sdp->sd_lockstruct;
+ return sprintf(buf, "%d\n", !!test_bit(DFL_FIRST_MOUNT_DONE, &ls->ls_recover_flags));
+}
+
+int gfs2_recover_set(struct gfs2_sbd *sdp, unsigned jid)
+{
+ struct gfs2_jdesc *jd;
+ int rv;
+
+ /* Wait for our primary journal to be initialized */
+ wait_for_completion(&sdp->sd_journal_ready);
+
+ spin_lock(&sdp->sd_jindex_spin);
+ rv = -EBUSY;
+ if (sdp->sd_jdesc->jd_jid == jid)
+ goto out;
+ rv = -ENOENT;
+ list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) {
+ if (jd->jd_jid != jid)
+ continue;
+ rv = gfs2_recover_journal(jd, false);
+ break;
+ }
+out:
+ spin_unlock(&sdp->sd_jindex_spin);
+ return rv;
+}
+
+static ssize_t recover_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
+{
+ unsigned jid;
+ int rv;
+
+ rv = sscanf(buf, "%u", &jid);
+ if (rv != 1)
+ return -EINVAL;
+
+ if (test_bit(SDF_NORECOVERY, &sdp->sd_flags)) {
+ rv = -ESHUTDOWN;
+ goto out;
+ }
+
+ rv = gfs2_recover_set(sdp, jid);
+out:
+ return rv ? rv : len;
+}
+
+static ssize_t recover_done_show(struct gfs2_sbd *sdp, char *buf)
+{
+ struct lm_lockstruct *ls = &sdp->sd_lockstruct;
+ return sprintf(buf, "%d\n", ls->ls_recover_jid_done);
+}
+
+static ssize_t recover_status_show(struct gfs2_sbd *sdp, char *buf)
+{
+ struct lm_lockstruct *ls = &sdp->sd_lockstruct;
+ return sprintf(buf, "%d\n", ls->ls_recover_jid_status);
+}
+
+static ssize_t jid_show(struct gfs2_sbd *sdp, char *buf)
+{
+ return sprintf(buf, "%d\n", sdp->sd_lockstruct.ls_jid);
+}
+
+static ssize_t jid_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
+{
+ int jid;
+ int rv;
+
+ rv = sscanf(buf, "%d", &jid);
+ if (rv != 1)
+ return -EINVAL;
+ rv = wait_for_completion_killable(&sdp->sd_locking_init);
+ if (rv)
+ return rv;
+ spin_lock(&sdp->sd_jindex_spin);
+ rv = -EINVAL;
+ if (sdp->sd_lockstruct.ls_ops->lm_mount == NULL)
+ goto out;
+ rv = -EBUSY;
+ if (test_bit(SDF_NOJOURNALID, &sdp->sd_flags) == 0)
+ goto out;
+ rv = 0;
+ if (sdp->sd_args.ar_spectator && jid > 0)
+ rv = jid = -EINVAL;
+ sdp->sd_lockstruct.ls_jid = jid;
+ clear_bit(SDF_NOJOURNALID, &sdp->sd_flags);
+ smp_mb__after_atomic();
+ wake_up_bit(&sdp->sd_flags, SDF_NOJOURNALID);
+out:
+ spin_unlock(&sdp->sd_jindex_spin);
+ return rv ? rv : len;
+}
+
+#define GDLM_ATTR(_name,_mode,_show,_store) \
+static struct gfs2_attr gdlm_attr_##_name = __ATTR(_name,_mode,_show,_store)
+
+GDLM_ATTR(proto_name, 0444, proto_name_show, NULL);
+GDLM_ATTR(block, 0644, block_show, block_store);
+GDLM_ATTR(withdraw, 0644, wdack_show, wdack_store);
+GDLM_ATTR(jid, 0644, jid_show, jid_store);
+GDLM_ATTR(first, 0644, lkfirst_show, lkfirst_store);
+GDLM_ATTR(first_done, 0444, first_done_show, NULL);
+GDLM_ATTR(recover, 0600, NULL, recover_store);
+GDLM_ATTR(recover_done, 0444, recover_done_show, NULL);
+GDLM_ATTR(recover_status, 0444, recover_status_show, NULL);
+
+static struct attribute *lock_module_attrs[] = {
+ &gdlm_attr_proto_name.attr,
+ &gdlm_attr_block.attr,
+ &gdlm_attr_withdraw.attr,
+ &gdlm_attr_jid.attr,
+ &gdlm_attr_first.attr,
+ &gdlm_attr_first_done.attr,
+ &gdlm_attr_recover.attr,
+ &gdlm_attr_recover_done.attr,
+ &gdlm_attr_recover_status.attr,
+ NULL,
+};
+
+/*
+ * get and set struct gfs2_tune fields
+ */
+
+static ssize_t quota_scale_show(struct gfs2_sbd *sdp, char *buf)
+{
+ return snprintf(buf, PAGE_SIZE, "%u %u\n",
+ sdp->sd_tune.gt_quota_scale_num,
+ sdp->sd_tune.gt_quota_scale_den);
+}
+
+static ssize_t quota_scale_store(struct gfs2_sbd *sdp, const char *buf,
+ size_t len)
+{
+ struct gfs2_tune *gt = &sdp->sd_tune;
+ unsigned int x, y;
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+
+ if (sscanf(buf, "%u %u", &x, &y) != 2 || !y)
+ return -EINVAL;
+
+ spin_lock(>->gt_spin);
+ gt->gt_quota_scale_num = x;
+ gt->gt_quota_scale_den = y;
+ spin_unlock(>->gt_spin);
+ return len;
+}
+
+static ssize_t tune_set(struct gfs2_sbd *sdp, unsigned int *field,
+ int check_zero, const char *buf, size_t len)
+{
+ struct gfs2_tune *gt = &sdp->sd_tune;
+ unsigned int x;
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+
+ x = simple_strtoul(buf, NULL, 0);
+
+ if (check_zero && !x)
+ return -EINVAL;
+
+ spin_lock(>->gt_spin);
+ *field = x;
+ spin_unlock(>->gt_spin);
+ return len;
+}
+
+#define TUNE_ATTR_3(name, show, store) \
+static struct gfs2_attr tune_attr_##name = __ATTR(name, 0644, show, store)
+
+#define TUNE_ATTR_2(name, store) \
+static ssize_t name##_show(struct gfs2_sbd *sdp, char *buf) \
+{ \
+ return snprintf(buf, PAGE_SIZE, "%u\n", sdp->sd_tune.gt_##name); \
+} \
+TUNE_ATTR_3(name, name##_show, store)
+
+#define TUNE_ATTR(name, check_zero) \
+static ssize_t name##_store(struct gfs2_sbd *sdp, const char *buf, size_t len)\
+{ \
+ return tune_set(sdp, &sdp->sd_tune.gt_##name, check_zero, buf, len); \
+} \
+TUNE_ATTR_2(name, name##_store)
+
+TUNE_ATTR(quota_warn_period, 0);
+TUNE_ATTR(quota_quantum, 0);
+TUNE_ATTR(max_readahead, 0);
+TUNE_ATTR(complain_secs, 0);
+TUNE_ATTR(statfs_slow, 0);
+TUNE_ATTR(new_files_jdata, 0);
+TUNE_ATTR(statfs_quantum, 1);
+TUNE_ATTR_3(quota_scale, quota_scale_show, quota_scale_store);
+
+static struct attribute *tune_attrs[] = {
+ &tune_attr_quota_warn_period.attr,
+ &tune_attr_quota_quantum.attr,
+ &tune_attr_max_readahead.attr,
+ &tune_attr_complain_secs.attr,
+ &tune_attr_statfs_slow.attr,
+ &tune_attr_statfs_quantum.attr,
+ &tune_attr_quota_scale.attr,
+ &tune_attr_new_files_jdata.attr,
+ NULL,
+};
+
+static struct attribute_group tune_group = {
+ .name = "tune",
+ .attrs = tune_attrs,
+};
+
+static struct attribute_group lock_module_group = {
+ .name = "lock_module",
+ .attrs = lock_module_attrs,
+};
+
+int gfs2_sys_fs_add(struct gfs2_sbd *sdp)
+{
+ struct super_block *sb = sdp->sd_vfs;
+ int error;
+ char ro[20];
+ char spectator[20];
+ char *envp[] = { ro, spectator, NULL };
+ int sysfs_frees_sdp = 0;
+
+ sprintf(ro, "RDONLY=%d", (sb->s_flags & MS_RDONLY) ? 1 : 0);
+ sprintf(spectator, "SPECTATOR=%d", sdp->sd_args.ar_spectator ? 1 : 0);
+
+ sdp->sd_kobj.kset = gfs2_kset;
+ error = kobject_init_and_add(&sdp->sd_kobj, &gfs2_ktype, NULL,
+ "%s", sdp->sd_table_name);
+ if (error)
+ goto fail_reg;
+
+ sysfs_frees_sdp = 1; /* Freeing sdp is now done by sysfs calling
+ function gfs2_sbd_release. */
+ error = sysfs_create_group(&sdp->sd_kobj, &tune_group);
+ if (error)
+ goto fail_reg;
+
+ error = sysfs_create_group(&sdp->sd_kobj, &lock_module_group);
+ if (error)
+ goto fail_tune;
+
+ error = sysfs_create_link(&sdp->sd_kobj,
+ &disk_to_dev(sb->s_bdev->bd_disk)->kobj,
+ "device");
+ if (error)
+ goto fail_lock_module;
+
+ kobject_uevent_env(&sdp->sd_kobj, KOBJ_ADD, envp);
+ return 0;
+
+fail_lock_module:
+ sysfs_remove_group(&sdp->sd_kobj, &lock_module_group);
+fail_tune:
+ sysfs_remove_group(&sdp->sd_kobj, &tune_group);
+fail_reg:
+ free_percpu(sdp->sd_lkstats);
+ fs_err(sdp, "error %d adding sysfs files", error);
+ if (sysfs_frees_sdp)
+ kobject_put(&sdp->sd_kobj);
+ else
+ kfree(sdp);
+ sb->s_fs_info = NULL;
+ return error;
+}
+
+void gfs2_sys_fs_del(struct gfs2_sbd *sdp)
+{
+ sysfs_remove_link(&sdp->sd_kobj, "device");
+ sysfs_remove_group(&sdp->sd_kobj, &tune_group);
+ sysfs_remove_group(&sdp->sd_kobj, &lock_module_group);
+ kobject_put(&sdp->sd_kobj);
+}
+
+static int gfs2_uevent(struct kset *kset, struct kobject *kobj,
+ struct kobj_uevent_env *env)
+{
+ struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj);
+ struct super_block *s = sdp->sd_vfs;
+ const u8 *uuid = s->s_uuid;
+
+ add_uevent_var(env, "LOCKTABLE=%s", sdp->sd_table_name);
+ add_uevent_var(env, "LOCKPROTO=%s", sdp->sd_proto_name);
+ if (!test_bit(SDF_NOJOURNALID, &sdp->sd_flags))
+ add_uevent_var(env, "JOURNALID=%d", sdp->sd_lockstruct.ls_jid);
+ if (gfs2_uuid_valid(uuid))
+ add_uevent_var(env, "UUID=%pUB", uuid);
+ return 0;
+}
+
+static const struct kset_uevent_ops gfs2_uevent_ops = {
+ .uevent = gfs2_uevent,
+};
+
+int gfs2_sys_init(void)
+{
+ gfs2_kset = kset_create_and_add("gfs2", &gfs2_uevent_ops, fs_kobj);
+ if (!gfs2_kset)
+ return -ENOMEM;
+ return 0;
+}
+
+void gfs2_sys_uninit(void)
+{
+ kset_unregister(gfs2_kset);
+}
+
Code Review / kvmfornfv.git / blobdiff