[GitHub/mt8127/android_kernel_alcatel_ttab.git] / fs / gfs2 / sys.c

/*
 * 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.
 */

#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)
{
	unsigned int count;

	mutex_lock(&sdp->sd_freeze_lock);
	count = sdp->sd_freeze_count;
	mutex_unlock(&sdp->sd_freeze_lock);

	return snprintf(buf, PAGE_SIZE, "%u\n", count);
}

static ssize_t freeze_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
{
	ssize_t ret = len;
	int error = 0;
	int n = simple_strtol(buf, NULL, 0);

	if (!capable(CAP_SYS_ADMIN))
		return -EACCES;

	switch (n) {
	case 0:
		gfs2_unfreeze_fs(sdp);
		break;
	case 1:
		error = gfs2_freeze_fs(sdp);
		break;
	default:
		ret = -EINVAL;
	}

	if (error)
		fs_warn(sdp, "freeze %d error %d", n, error);

	return ret;
}

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 -EACCES;

	if (simple_strtol(buf, NULL, 0) != 1)
		return -EINVAL;

	gfs2_lm_withdraw(sdp,
		"GFS2: fsid=%s: withdrawing from cluster at user's request\n",
		sdp->sd_fsname);
	return len;
}

static ssize_t statfs_sync_store(struct gfs2_sbd *sdp, const char *buf,
				 size_t len)
{
	if (!capable(CAP_SYS_ADMIN))
		return -EACCES;

	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 -EACCES;

	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)
{
	int error;
	u32 id;

	if (!capable(CAP_SYS_ADMIN))
		return -EACCES;

	id = simple_strtoul(buf, NULL, 0);

	error = gfs2_quota_refresh(sdp, 1, id);
	return error ? error : len;
}

static ssize_t quota_refresh_group_store(struct gfs2_sbd *sdp, const char *buf,
					 size_t len)
{
	int error;
	u32 id;

	if (!capable(CAP_SYS_ADMIN))
		return -EACCES;

	id = simple_strtoul(buf, NULL, 0);

	error = gfs2_quota_refresh(sdp, 0, id);
	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 -EACCES;

	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_TRANS_LOCK)
		glops = &gfs2_trans_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_clear_bit();
		gfs2_glock_thaw(sdp);
	} 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;

	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_clear_bit();
	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, withdraw_show,		withdraw_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 -EACCES;

	if (sscanf(buf, "%u %u", &x, &y) != 2 || !y)
		return -EINVAL;

	spin_lock(&gt->gt_spin);
	gt->gt_quota_scale_num = x;
	gt->gt_quota_scale_den = y;
	spin_unlock(&gt->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 -EACCES;

	x = simple_strtoul(buf, NULL, 0);

	if (check_zero && !x)
		return -EINVAL;

	spin_lock(&gt->gt_spin);
	*field = x;
	spin_unlock(&gt->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(quota_simul_sync, 1);
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_quota_simul_sync.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);
}
Commit	Line	Data
b3b94faa DT	1	/*
b3b94faa DT	2	* Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
3a8a9a10	3	* Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
b3b94faa DT	4	*
	5	* This copyrighted material is made available to anyone wishing to use,
	6	* modify, copy, or redistribute it subject to the terms and conditions
e9fc2aa0	7	* of the GNU General Public License version 2.
b3b94faa DT	8	*/
	9
	10	#include <linux/sched.h>
b3b94faa DT	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>
b3b94faa	16	#include <asm/uaccess.h>
f057f6cd	17	#include <linux/gfs2_ondisk.h>
31e54b01	18	#include <linux/genhd.h>
b3b94faa DT	19
b3b94faa DT	20	#include "gfs2.h"
5c676f6d	21	#include "incore.h"
b3b94faa DT	22	#include "sys.h"
	23	#include "super.h"
	24	#include "glock.h"
	25	#include "quota.h"
5c676f6d	26	#include "util.h"
64d576ba	27	#include "glops.h"
6ecd7c2d	28	#include "recovery.h"
b3b94faa	29
48c2b613 SW	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
52cf25d0	52	static const struct sysfs_ops gfs2_attr_ops = {
48c2b613 SW	53	.show = gfs2_attr_show,
	54	.store = gfs2_attr_store,
	55	};
	56
	57
	58	static struct kset *gfs2_kset;
	59
b3b94faa DT	60	static ssize_t id_show(struct gfs2_sbd sdp, char buf)
b3b94faa DT	61	{
c7227e46 BP	62	return snprintf(buf, PAGE_SIZE, "%u:%u\n",
c7227e46 BP	63	MAJOR(sdp->sd_vfs->s_dev), MINOR(sdp->sd_vfs->s_dev));
b3b94faa DT	64	}
	65
	66	static ssize_t fsname_show(struct gfs2_sbd sdp, char buf)
	67	{
3204a6c0	68	return snprintf(buf, PAGE_SIZE, "%s\n", sdp->sd_fsname);
b3b94faa DT	69	}
b3b94faa DT	70
02e3cc70 SW	71	static int gfs2_uuid_valid(const u8 *uuid)
	72	{
	73	int i;
	74
	75	for (i = 0; i < 16; i++) {
	76	if (uuid[i])
	77	return 1;
	78	}
	79	return 0;
	80	}
	81
	82	static ssize_t uuid_show(struct gfs2_sbd sdp, char buf)
	83	{
32e471ef SW	84	struct super_block *s = sdp->sd_vfs;
32e471ef SW	85	const u8 *uuid = s->s_uuid;
02e3cc70 SW	86	buf[0] = '\0';
	87	if (!gfs2_uuid_valid(uuid))
	88	return 0;
f0b34ae6	89	return snprintf(buf, PAGE_SIZE, "%pUB\n", uuid);
02e3cc70 SW	90	}
02e3cc70 SW	91
b3b94faa DT	92	static ssize_t freeze_show(struct gfs2_sbd sdp, char buf)
	93	{
	94	unsigned int count;
	95
f55ab26a	96	mutex_lock(&sdp->sd_freeze_lock);
b3b94faa	97	count = sdp->sd_freeze_count;
f55ab26a	98	mutex_unlock(&sdp->sd_freeze_lock);
b3b94faa	99
3204a6c0	100	return snprintf(buf, PAGE_SIZE, "%u\n", count);
b3b94faa DT	101	}
	102
	103	static ssize_t freeze_store(struct gfs2_sbd sdp, const char buf, size_t len)
	104	{
	105	ssize_t ret = len;
	106	int error = 0;
	107	int n = simple_strtol(buf, NULL, 0);
	108
	109	if (!capable(CAP_SYS_ADMIN))
	110	return -EACCES;
	111
	112	switch (n) {
	113	case 0:
	114	gfs2_unfreeze_fs(sdp);
	115	break;
	116	case 1:
	117	error = gfs2_freeze_fs(sdp);
	118	break;
	119	default:
	120	ret = -EINVAL;
	121	}
	122
	123	if (error)
	124	fs_warn(sdp, "freeze %d error %d", n, error);
	125
	126	return ret;
	127	}
	128
	129	static ssize_t withdraw_show(struct gfs2_sbd sdp, char buf)
	130	{
	131	unsigned int b = test_bit(SDF_SHUTDOWN, &sdp->sd_flags);
3204a6c0	132	return snprintf(buf, PAGE_SIZE, "%u\n", b);
b3b94faa DT	133	}
	134
	135	static ssize_t withdraw_store(struct gfs2_sbd sdp, const char buf, size_t len)
	136	{
	137	if (!capable(CAP_SYS_ADMIN))
	138	return -EACCES;
	139
	140	if (simple_strtol(buf, NULL, 0) != 1)
	141	return -EINVAL;
	142
	143	gfs2_lm_withdraw(sdp,
	144	"GFS2: fsid=%s: withdrawing from cluster at user's request\n",
	145	sdp->sd_fsname);
	146	return len;
	147	}
	148
	149	static ssize_t statfs_sync_store(struct gfs2_sbd sdp, const char buf,
	150	size_t len)
	151	{
	152	if (!capable(CAP_SYS_ADMIN))
	153	return -EACCES;
	154
	155	if (simple_strtol(buf, NULL, 0) != 1)
	156	return -EINVAL;
	157
8c42d637	158	gfs2_statfs_sync(sdp->sd_vfs, 0);
b3b94faa DT	159	return len;
	160	}
	161
b3b94faa DT	162	static ssize_t quota_sync_store(struct gfs2_sbd sdp, const char buf,
	163	size_t len)
	164	{
	165	if (!capable(CAP_SYS_ADMIN))
	166	return -EACCES;
	167
	168	if (simple_strtol(buf, NULL, 0) != 1)
	169	return -EINVAL;
	170
ceed1723	171	gfs2_quota_sync(sdp->sd_vfs, 0);
b3b94faa DT	172	return len;
	173	}
	174
	175	static ssize_t quota_refresh_user_store(struct gfs2_sbd sdp, const char buf,
	176	size_t len)
	177	{
ea762338	178	int error;
cd915493	179	u32 id;
b3b94faa DT	180
	181	if (!capable(CAP_SYS_ADMIN))
	182	return -EACCES;
	183
	184	id = simple_strtoul(buf, NULL, 0);
	185
ea762338 SW	186	error = gfs2_quota_refresh(sdp, 1, id);
ea762338 SW	187	return error ? error : len;
b3b94faa DT	188	}
	189
	190	static ssize_t quota_refresh_group_store(struct gfs2_sbd sdp, const char buf,
	191	size_t len)
	192	{
ea762338	193	int error;
cd915493	194	u32 id;
b3b94faa DT	195
	196	if (!capable(CAP_SYS_ADMIN))
	197	return -EACCES;
	198
	199	id = simple_strtoul(buf, NULL, 0);
	200
ea762338 SW	201	error = gfs2_quota_refresh(sdp, 0, id);
ea762338 SW	202	return error ? error : len;
b3b94faa DT	203	}
b3b94faa DT	204
64d576ba SW	205	static ssize_t demote_rq_store(struct gfs2_sbd sdp, const char buf, size_t len)
	206	{
	207	struct gfs2_glock *gl;
	208	const struct gfs2_glock_operations *glops;
	209	unsigned int glmode;
	210	unsigned int gltype;
	211	unsigned long long glnum;
	212	char mode[16];
	213	int rv;
	214
	215	if (!capable(CAP_SYS_ADMIN))
	216	return -EACCES;
	217
	218	rv = sscanf(buf, "%u:%llu %15s", &gltype, &glnum,
	219	mode);
	220	if (rv != 3)
	221	return -EINVAL;
	222
	223	if (strcmp(mode, "EX") == 0)
	224	glmode = LM_ST_UNLOCKED;
	225	else if ((strcmp(mode, "CW") == 0) \|\| (strcmp(mode, "DF") == 0))
	226	glmode = LM_ST_DEFERRED;
	227	else if ((strcmp(mode, "PR") == 0) \|\| (strcmp(mode, "SH") == 0))
	228	glmode = LM_ST_SHARED;
	229	else
	230	return -EINVAL;
	231
	232	if (gltype > LM_TYPE_JOURNAL)
	233	return -EINVAL;
13466985 SW	234	if (gltype == LM_TYPE_NONDISK && glnum == GFS2_TRANS_LOCK)
	235	glops = &gfs2_trans_glops;
	236	else
	237	glops = gfs2_glops_list[gltype];
64d576ba SW	238	if (glops == NULL)
64d576ba SW	239	return -EINVAL;
6a99be5d	240	if (!test_and_set_bit(SDF_DEMOTE, &sdp->sd_flags))
913a71d2	241	fs_info(sdp, "demote interface used\n");
64d576ba SW	242	rv = gfs2_glock_get(sdp, glnum, glops, 0, &gl);
	243	if (rv)
	244	return rv;
	245	gfs2_glock_cb(gl, glmode);
	246	gfs2_glock_put(gl);
	247	return len;
	248	}
	249
b3b94faa DT	250
	251	#define GFS2_ATTR(name, mode, show, store) \
	252	static struct gfs2_attr gfs2_attr_##name = __ATTR(name, mode, show, store)
	253
	254	GFS2_ATTR(id, 0444, id_show, NULL);
	255	GFS2_ATTR(fsname, 0444, fsname_show, NULL);
02e3cc70	256	GFS2_ATTR(uuid, 0444, uuid_show, NULL);
b3b94faa	257	GFS2_ATTR(freeze, 0644, freeze_show, freeze_store);
b3b94faa DT	258	GFS2_ATTR(withdraw, 0644, withdraw_show, withdraw_store);
	259	GFS2_ATTR(statfs_sync, 0200, NULL, statfs_sync_store);
	260	GFS2_ATTR(quota_sync, 0200, NULL, quota_sync_store);
	261	GFS2_ATTR(quota_refresh_user, 0200, NULL, quota_refresh_user_store);
	262	GFS2_ATTR(quota_refresh_group, 0200, NULL, quota_refresh_group_store);
64d576ba	263	GFS2_ATTR(demote_rq, 0200, NULL, demote_rq_store);
b3b94faa DT	264
	265	static struct attribute *gfs2_attrs[] = {
	266	&gfs2_attr_id.attr,
	267	&gfs2_attr_fsname.attr,
02e3cc70	268	&gfs2_attr_uuid.attr,
b3b94faa	269	&gfs2_attr_freeze.attr,
b3b94faa DT	270	&gfs2_attr_withdraw.attr,
	271	&gfs2_attr_statfs_sync.attr,
	272	&gfs2_attr_quota_sync.attr,
	273	&gfs2_attr_quota_refresh_user.attr,
	274	&gfs2_attr_quota_refresh_group.attr,
64d576ba	275	&gfs2_attr_demote_rq.attr,
b3b94faa DT	276	NULL,
	277	};
	278
0d515210 BP	279	static void gfs2_sbd_release(struct kobject *kobj)
	280	{
	281	struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj);
	282
	283	kfree(sdp);
	284	}
	285
b3b94faa	286	static struct kobj_type gfs2_ktype = {
0d515210	287	.release = gfs2_sbd_release,
b3b94faa DT	288	.default_attrs = gfs2_attrs,
	289	.sysfs_ops = &gfs2_attr_ops,
	290	};
	291
f057f6cd SW	292
	293	/*
	294	* lock_module. Originally from lock_dlm
	295	*/
	296
	297	static ssize_t proto_name_show(struct gfs2_sbd sdp, char buf)
	298	{
	299	const struct lm_lockops *ops = sdp->sd_lockstruct.ls_ops;
	300	return sprintf(buf, "%s\n", ops->lm_proto_name);
	301	}
	302
	303	static ssize_t block_show(struct gfs2_sbd sdp, char buf)
	304	{
	305	struct lm_lockstruct *ls = &sdp->sd_lockstruct;
	306	ssize_t ret;
	307	int val = 0;
	308
e0c2a9aa	309	if (test_bit(DFL_BLOCK_LOCKS, &ls->ls_recover_flags))
f057f6cd SW	310	val = 1;
	311	ret = sprintf(buf, "%d\n", val);
	312	return ret;
	313	}
	314
	315	static ssize_t block_store(struct gfs2_sbd sdp, const char buf, size_t len)
	316	{
	317	struct lm_lockstruct *ls = &sdp->sd_lockstruct;
	318	ssize_t ret = len;
	319	int val;
	320
	321	val = simple_strtol(buf, NULL, 0);
	322
	323	if (val == 1)
e0c2a9aa	324	set_bit(DFL_BLOCK_LOCKS, &ls->ls_recover_flags);
f057f6cd	325	else if (val == 0) {
e0c2a9aa	326	clear_bit(DFL_BLOCK_LOCKS, &ls->ls_recover_flags);
f057f6cd SW	327	smp_mb__after_clear_bit();
	328	gfs2_glock_thaw(sdp);
	329	} else {
	330	ret = -EINVAL;
	331	}
	332	return ret;
	333	}
	334
f057f6cd SW	335	static ssize_t lkfirst_show(struct gfs2_sbd sdp, char buf)
	336	{
	337	struct lm_lockstruct *ls = &sdp->sd_lockstruct;
	338	return sprintf(buf, "%d\n", ls->ls_first);
	339	}
	340
ba6e9364 SW	341	static ssize_t lkfirst_store(struct gfs2_sbd sdp, const char buf, size_t len)
	342	{
	343	unsigned first;
	344	int rv;
	345
	346	rv = sscanf(buf, "%u", &first);
	347	if (rv != 1 \|\| first > 1)
	348	return -EINVAL;
3942ae53 SW	349	rv = wait_for_completion_killable(&sdp->sd_locking_init);
	350	if (rv)
	351	return rv;
ba6e9364 SW	352	spin_lock(&sdp->sd_jindex_spin);
	353	rv = -EBUSY;
	354	if (test_bit(SDF_NOJOURNALID, &sdp->sd_flags) == 0)
	355	goto out;
	356	rv = -EINVAL;
	357	if (sdp->sd_args.ar_spectator)
	358	goto out;
	359	if (sdp->sd_lockstruct.ls_ops->lm_mount == NULL)
	360	goto out;
e0c2a9aa DT	361	sdp->sd_lockstruct.ls_first = first;
e0c2a9aa DT	362	rv = 0;
ba6e9364 SW	363	out:
	364	spin_unlock(&sdp->sd_jindex_spin);
	365	return rv ? rv : len;
	366	}
	367
f057f6cd SW	368	static ssize_t first_done_show(struct gfs2_sbd sdp, char buf)
	369	{
	370	struct lm_lockstruct *ls = &sdp->sd_lockstruct;
e0c2a9aa	371	return sprintf(buf, "%d\n", !!test_bit(DFL_FIRST_MOUNT_DONE, &ls->ls_recover_flags));
f057f6cd SW	372	}
f057f6cd SW	373
e0c2a9aa	374	int gfs2_recover_set(struct gfs2_sbd *sdp, unsigned jid)
f057f6cd SW	375	{
f057f6cd SW	376	struct gfs2_jdesc *jd;
fe64d517 SW	377	int rv;
fe64d517 SW	378
f057f6cd	379	spin_lock(&sdp->sd_jindex_spin);
fe64d517 SW	380	rv = -EBUSY;
	381	if (sdp->sd_jdesc->jd_jid == jid)
	382	goto out;
	383	rv = -ENOENT;
f057f6cd SW	384	list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) {
	385	if (jd->jd_jid != jid)
	386	continue;
6ecd7c2d	387	rv = gfs2_recover_journal(jd, false);
f057f6cd SW	388	break;
f057f6cd SW	389	}
fe64d517	390	out:
f057f6cd	391	spin_unlock(&sdp->sd_jindex_spin);
e0c2a9aa DT	392	return rv;
	393	}
	394
	395	static ssize_t recover_store(struct gfs2_sbd sdp, const char buf, size_t len)
	396	{
	397	unsigned jid;
	398	int rv;
	399
	400	rv = sscanf(buf, "%u", &jid);
	401	if (rv != 1)
	402	return -EINVAL;
	403
1a058f52 DT	404	if (test_bit(SDF_NORECOVERY, &sdp->sd_flags)) {
	405	rv = -ESHUTDOWN;
	406	goto out;
	407	}
e0c2a9aa	408
1a058f52 DT	409	rv = gfs2_recover_set(sdp, jid);
1a058f52 DT	410	out:
fe64d517	411	return rv ? rv : len;
f057f6cd SW	412	}
	413
	414	static ssize_t recover_done_show(struct gfs2_sbd sdp, char buf)
	415	{
	416	struct lm_lockstruct *ls = &sdp->sd_lockstruct;
	417	return sprintf(buf, "%d\n", ls->ls_recover_jid_done);
	418	}
	419
	420	static ssize_t recover_status_show(struct gfs2_sbd sdp, char buf)
	421	{
	422	struct lm_lockstruct *ls = &sdp->sd_lockstruct;
	423	return sprintf(buf, "%d\n", ls->ls_recover_jid_status);
	424	}
	425
e1b28aab SW	426	static ssize_t jid_show(struct gfs2_sbd sdp, char buf)
e1b28aab SW	427	{
feb47ca9	428	return sprintf(buf, "%d\n", sdp->sd_lockstruct.ls_jid);
e1b28aab SW	429	}
e1b28aab SW	430
ba6e9364 SW	431	static ssize_t jid_store(struct gfs2_sbd sdp, const char buf, size_t len)
ba6e9364 SW	432	{
feb47ca9	433	int jid;
ba6e9364 SW	434	int rv;
ba6e9364 SW	435
feb47ca9	436	rv = sscanf(buf, "%d", &jid);
ba6e9364 SW	437	if (rv != 1)
ba6e9364 SW	438	return -EINVAL;
3942ae53 SW	439	rv = wait_for_completion_killable(&sdp->sd_locking_init);
	440	if (rv)
	441	return rv;
ba6e9364 SW	442	spin_lock(&sdp->sd_jindex_spin);
ba6e9364 SW	443	rv = -EINVAL;
ba6e9364 SW	444	if (sdp->sd_lockstruct.ls_ops->lm_mount == NULL)
	445	goto out;
	446	rv = -EBUSY;
feb47ca9	447	if (test_bit(SDF_NOJOURNALID, &sdp->sd_flags) == 0)
ba6e9364	448	goto out;
feb47ca9 SW	449	rv = 0;
	450	if (sdp->sd_args.ar_spectator && jid > 0)
	451	rv = jid = -EINVAL;
ba6e9364	452	sdp->sd_lockstruct.ls_jid = jid;
feb47ca9	453	clear_bit(SDF_NOJOURNALID, &sdp->sd_flags);
ba6e9364 SW	454	smp_mb__after_clear_bit();
ba6e9364 SW	455	wake_up_bit(&sdp->sd_flags, SDF_NOJOURNALID);
ba6e9364 SW	456	out:
	457	spin_unlock(&sdp->sd_jindex_spin);
	458	return rv ? rv : len;
	459	}
	460
f057f6cd	461	#define GDLM_ATTR(_name,_mode,_show,_store) \
48c2b613	462	static struct gfs2_attr gdlm_attr_##_name = __ATTR(_name,_mode,_show,_store)
f057f6cd	463
d7e623da SW	464	GDLM_ATTR(proto_name, 0444, proto_name_show, NULL);
	465	GDLM_ATTR(block, 0644, block_show, block_store);
	466	GDLM_ATTR(withdraw, 0644, withdraw_show, withdraw_store);
ba6e9364 SW	467	GDLM_ATTR(jid, 0644, jid_show, jid_store);
ba6e9364 SW	468	GDLM_ATTR(first, 0644, lkfirst_show, lkfirst_store);
d7e623da SW	469	GDLM_ATTR(first_done, 0444, first_done_show, NULL);
	470	GDLM_ATTR(recover, 0600, NULL, recover_store);
	471	GDLM_ATTR(recover_done, 0444, recover_done_show, NULL);
	472	GDLM_ATTR(recover_status, 0444, recover_status_show, NULL);
f057f6cd SW	473
	474	static struct attribute *lock_module_attrs[] = {
	475	&gdlm_attr_proto_name.attr,
	476	&gdlm_attr_block.attr,
	477	&gdlm_attr_withdraw.attr,
e1b28aab	478	&gdlm_attr_jid.attr,
f057f6cd SW	479	&gdlm_attr_first.attr,
	480	&gdlm_attr_first_done.attr,
	481	&gdlm_attr_recover.attr,
	482	&gdlm_attr_recover_done.attr,
	483	&gdlm_attr_recover_status.attr,
ea67eedb	484	NULL,
b3b94faa DT	485	};
b3b94faa DT	486
b3b94faa DT	487	/*
	488	* get and set struct gfs2_tune fields
	489	*/
	490
	491	static ssize_t quota_scale_show(struct gfs2_sbd sdp, char buf)
	492	{
3204a6c0 DT	493	return snprintf(buf, PAGE_SIZE, "%u %u\n",
	494	sdp->sd_tune.gt_quota_scale_num,
	495	sdp->sd_tune.gt_quota_scale_den);
b3b94faa DT	496	}
	497
	498	static ssize_t quota_scale_store(struct gfs2_sbd sdp, const char buf,
	499	size_t len)
	500	{
	501	struct gfs2_tune *gt = &sdp->sd_tune;
	502	unsigned int x, y;
	503
	504	if (!capable(CAP_SYS_ADMIN))
	505	return -EACCES;
	506
	507	if (sscanf(buf, "%u %u", &x, &y) != 2 \|\| !y)
	508	return -EINVAL;
	509
	510	spin_lock(&gt->gt_spin);
	511	gt->gt_quota_scale_num = x;
	512	gt->gt_quota_scale_den = y;
	513	spin_unlock(&gt->gt_spin);
	514	return len;
	515	}
	516
	517	static ssize_t tune_set(struct gfs2_sbd sdp, unsigned int field,
	518	int check_zero, const char *buf, size_t len)
	519	{
	520	struct gfs2_tune *gt = &sdp->sd_tune;
	521	unsigned int x;
	522
	523	if (!capable(CAP_SYS_ADMIN))
	524	return -EACCES;
	525
	526	x = simple_strtoul(buf, NULL, 0);
	527
	528	if (check_zero && !x)
	529	return -EINVAL;
	530
	531	spin_lock(&gt->gt_spin);
	532	*field = x;
	533	spin_unlock(&gt->gt_spin);
	534	return len;
	535	}
	536
b3b94faa	537	#define TUNE_ATTR_3(name, show, store) \
48c2b613	538	static struct gfs2_attr tune_attr_##name = __ATTR(name, 0644, show, store)
b3b94faa DT	539
	540	#define TUNE_ATTR_2(name, store) \
	541	static ssize_t name##_show(struct gfs2_sbd sdp, char buf) \
	542	{ \
3204a6c0	543	return snprintf(buf, PAGE_SIZE, "%u\n", sdp->sd_tune.gt_##name); \
b3b94faa DT	544	} \
	545	TUNE_ATTR_3(name, name##_show, store)
	546
	547	#define TUNE_ATTR(name, check_zero) \
	548	static ssize_t name##_store(struct gfs2_sbd sdp, const char buf, size_t len)\
	549	{ \
	550	return tune_set(sdp, &sdp->sd_tune.gt_##name, check_zero, buf, len); \
	551	} \
	552	TUNE_ATTR_2(name, name##_store)
	553
b3b94faa DT	554	TUNE_ATTR(quota_warn_period, 0);
b3b94faa DT	555	TUNE_ATTR(quota_quantum, 0);
b3b94faa DT	556	TUNE_ATTR(max_readahead, 0);
b3b94faa DT	557	TUNE_ATTR(complain_secs, 0);
b3b94faa DT	558	TUNE_ATTR(statfs_slow, 0);
b3b94faa DT	559	TUNE_ATTR(new_files_jdata, 0);
b3b94faa	560	TUNE_ATTR(quota_simul_sync, 1);
b3b94faa	561	TUNE_ATTR(statfs_quantum, 1);
b3b94faa DT	562	TUNE_ATTR_3(quota_scale, quota_scale_show, quota_scale_store);
	563
	564	static struct attribute *tune_attrs[] = {
b3b94faa DT	565	&tune_attr_quota_warn_period.attr,
b3b94faa DT	566	&tune_attr_quota_quantum.attr,
b3b94faa DT	567	&tune_attr_max_readahead.attr,
b3b94faa DT	568	&tune_attr_complain_secs.attr,
b3b94faa DT	569	&tune_attr_statfs_slow.attr,
b3b94faa DT	570	&tune_attr_quota_simul_sync.attr,
b3b94faa	571	&tune_attr_statfs_quantum.attr,
b3b94faa DT	572	&tune_attr_quota_scale.attr,
b3b94faa DT	573	&tune_attr_new_files_jdata.attr,
ea67eedb	574	NULL,
b3b94faa DT	575	};
b3b94faa DT	576
b3b94faa DT	577	static struct attribute_group tune_group = {
b3b94faa DT	578	.name = "tune",
ea67eedb	579	.attrs = tune_attrs,
b3b94faa DT	580	};
b3b94faa DT	581
f057f6cd SW	582	static struct attribute_group lock_module_group = {
	583	.name = "lock_module",
	584	.attrs = lock_module_attrs,
	585	};
	586
b3b94faa DT	587	int gfs2_sys_fs_add(struct gfs2_sbd *sdp)
b3b94faa DT	588	{
440d6da2	589	struct super_block *sb = sdp->sd_vfs;
b3b94faa	590	int error;
440d6da2 SW	591	char ro[20];
	592	char spectator[20];
	593	char *envp[] = { ro, spectator, NULL };
0d515210	594	int sysfs_frees_sdp = 0;
440d6da2 SW	595
	596	sprintf(ro, "RDONLY=%d", (sb->s_flags & MS_RDONLY) ? 1 : 0);
	597	sprintf(spectator, "SPECTATOR=%d", sdp->sd_args.ar_spectator ? 1 : 0);
b3b94faa	598
9bec101a	599	sdp->sd_kobj.kset = gfs2_kset;
901195ed GKH	600	error = kobject_init_and_add(&sdp->sd_kobj, &gfs2_ktype, NULL,
901195ed GKH	601	"%s", sdp->sd_table_name);
b3b94faa	602	if (error)
0d515210	603	goto fail_reg;
b3b94faa	604
0d515210 BP	605	sysfs_frees_sdp = 1; /* Freeing sdp is now done by sysfs calling
0d515210 BP	606	function gfs2_sbd_release. */
b3b94faa DT	607	error = sysfs_create_group(&sdp->sd_kobj, &tune_group);
b3b94faa DT	608	if (error)
f6eb5349	609	goto fail_reg;
b3b94faa	610
f057f6cd SW	611	error = sysfs_create_group(&sdp->sd_kobj, &lock_module_group);
	612	if (error)
	613	goto fail_tune;
	614
31e54b01 SW	615	error = sysfs_create_link(&sdp->sd_kobj,
	616	&disk_to_dev(sb->s_bdev->bd_disk)->kobj,
	617	"device");
	618	if (error)
	619	goto fail_lock_module;
	620
440d6da2	621	kobject_uevent_env(&sdp->sd_kobj, KOBJ_ADD, envp);
b3b94faa DT	622	return 0;
b3b94faa DT	623
31e54b01 SW	624	fail_lock_module:
31e54b01 SW	625	sysfs_remove_group(&sdp->sd_kobj, &lock_module_group);
f057f6cd SW	626	fail_tune:
f057f6cd SW	627	sysfs_remove_group(&sdp->sd_kobj, &tune_group);
a91ea69f	628	fail_reg:
0d515210	629	free_percpu(sdp->sd_lkstats);
65952fb4	630	fs_err(sdp, "error %d adding sysfs files", error);
0d515210 BP	631	if (sysfs_frees_sdp)
	632	kobject_put(&sdp->sd_kobj);
	633	else
	634	kfree(sdp);
	635	sb->s_fs_info = NULL;
b3b94faa DT	636	return error;
	637	}
	638
	639	void gfs2_sys_fs_del(struct gfs2_sbd *sdp)
	640	{
31e54b01	641	sysfs_remove_link(&sdp->sd_kobj, "device");
b3b94faa	642	sysfs_remove_group(&sdp->sd_kobj, &tune_group);
f057f6cd	643	sysfs_remove_group(&sdp->sd_kobj, &lock_module_group);
197b12d6	644	kobject_put(&sdp->sd_kobj);
b3b94faa DT	645	}
b3b94faa DT	646
fdd1062e SW	647	static int gfs2_uevent(struct kset kset, struct kobject kobj,
	648	struct kobj_uevent_env *env)
	649	{
	650	struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj);
32e471ef SW	651	struct super_block *s = sdp->sd_vfs;
32e471ef SW	652	const u8 *uuid = s->s_uuid;
02e3cc70	653
fdd1062e SW	654	add_uevent_var(env, "LOCKTABLE=%s", sdp->sd_table_name);
fdd1062e SW	655	add_uevent_var(env, "LOCKPROTO=%s", sdp->sd_proto_name);
ba6e9364	656	if (!test_bit(SDF_NOJOURNALID, &sdp->sd_flags))
feb47ca9	657	add_uevent_var(env, "JOURNALID=%d", sdp->sd_lockstruct.ls_jid);
f0b34ae6 JP	658	if (gfs2_uuid_valid(uuid))
f0b34ae6 JP	659	add_uevent_var(env, "UUID=%pUB", uuid);
fdd1062e SW	660	return 0;
	661	}
	662
9cd43611	663	static const struct kset_uevent_ops gfs2_uevent_ops = {
fdd1062e SW	664	.uevent = gfs2_uevent,
	665	};
	666
b3b94faa DT	667	int gfs2_sys_init(void)
b3b94faa DT	668	{
fdd1062e	669	gfs2_kset = kset_create_and_add("gfs2", &gfs2_uevent_ops, fs_kobj);
9bec101a GKH	670	if (!gfs2_kset)
	671	return -ENOMEM;
	672	return 0;
b3b94faa DT	673	}
	674
	675	void gfs2_sys_uninit(void)
	676	{
9bec101a	677	kset_unregister(gfs2_kset);
b3b94faa DT	678	}
b3b94faa DT	679