[mirror_ubuntu-zesty-kernel.git] / fs / ceph / debugfs.c

#include <linux/ceph/ceph_debug.h>

#include <linux/device.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/ctype.h>
#include <linux/debugfs.h>
#include <linux/seq_file.h>

#include <linux/ceph/libceph.h>
#include <linux/ceph/mon_client.h>
#include <linux/ceph/auth.h>
#include <linux/ceph/debugfs.h>

#include "super.h"

#ifdef CONFIG_DEBUG_FS

#include "mds_client.h"

static int mdsmap_show(struct seq_file *s, void *p)
{
	int i;
	struct ceph_fs_client *fsc = s->private;

	if (fsc->mdsc == NULL || fsc->mdsc->mdsmap == NULL)
		return 0;
	seq_printf(s, "epoch %d\n", fsc->mdsc->mdsmap->m_epoch);
	seq_printf(s, "root %d\n", fsc->mdsc->mdsmap->m_root);
	seq_printf(s, "session_timeout %d\n",
		       fsc->mdsc->mdsmap->m_session_timeout);
	seq_printf(s, "session_autoclose %d\n",
		       fsc->mdsc->mdsmap->m_session_autoclose);
	for (i = 0; i < fsc->mdsc->mdsmap->m_max_mds; i++) {
		struct ceph_entity_addr *addr =
			&fsc->mdsc->mdsmap->m_info[i].addr;
		int state = fsc->mdsc->mdsmap->m_info[i].state;

		seq_printf(s, "\tmds%d\t%s\t(%s)\n", i,
			       ceph_pr_addr(&addr->in_addr),
			       ceph_mds_state_name(state));
	}
	return 0;
}

/*
 * mdsc debugfs
 */
static int mdsc_show(struct seq_file *s, void *p)
{
	struct ceph_fs_client *fsc = s->private;
	struct ceph_mds_client *mdsc = fsc->mdsc;
	struct ceph_mds_request *req;
	struct rb_node *rp;
	int pathlen;
	u64 pathbase;
	char *path;

	mutex_lock(&mdsc->mutex);
	for (rp = rb_first(&mdsc->request_tree); rp; rp = rb_next(rp)) {
		req = rb_entry(rp, struct ceph_mds_request, r_node);

		if (req->r_request && req->r_session)
			seq_printf(s, "%lld\tmds%d\t", req->r_tid,
				   req->r_session->s_mds);
		else if (!req->r_request)
			seq_printf(s, "%lld\t(no request)\t", req->r_tid);
		else
			seq_printf(s, "%lld\t(no session)\t", req->r_tid);

		seq_printf(s, "%s", ceph_mds_op_name(req->r_op));

		if (req->r_got_unsafe)
			seq_puts(s, "\t(unsafe)");
		else
			seq_puts(s, "\t");

		if (req->r_inode) {
			seq_printf(s, " #%llx", ceph_ino(req->r_inode));
		} else if (req->r_dentry) {
			path = ceph_mdsc_build_path(req->r_dentry, &pathlen,
						    &pathbase, 0);
			if (IS_ERR(path))
				path = NULL;
			spin_lock(&req->r_dentry->d_lock);
			seq_printf(s, " #%llx/%pd (%s)",
				   ceph_ino(d_inode(req->r_dentry->d_parent)),
				   req->r_dentry,
				   path ? path : "");
			spin_unlock(&req->r_dentry->d_lock);
			kfree(path);
		} else if (req->r_path1) {
			seq_printf(s, " #%llx/%s", req->r_ino1.ino,
				   req->r_path1);
		} else {
			seq_printf(s, " #%llx", req->r_ino1.ino);
		}

		if (req->r_old_dentry) {
			path = ceph_mdsc_build_path(req->r_old_dentry, &pathlen,
						    &pathbase, 0);
			if (IS_ERR(path))
				path = NULL;
			spin_lock(&req->r_old_dentry->d_lock);
			seq_printf(s, " #%llx/%pd (%s)",
				   req->r_old_dentry_dir ?
				   ceph_ino(req->r_old_dentry_dir) : 0,
				   req->r_old_dentry,
				   path ? path : "");
			spin_unlock(&req->r_old_dentry->d_lock);
			kfree(path);
		} else if (req->r_path2 && req->r_op != CEPH_MDS_OP_SYMLINK) {
			if (req->r_ino2.ino)
				seq_printf(s, " #%llx/%s", req->r_ino2.ino,
					   req->r_path2);
			else
				seq_printf(s, " %s", req->r_path2);
		}

		seq_puts(s, "\n");
	}
	mutex_unlock(&mdsc->mutex);

	return 0;
}

static int caps_show(struct seq_file *s, void *p)
{
	struct ceph_fs_client *fsc = s->private;
	int total, avail, used, reserved, min;

	ceph_reservation_status(fsc, &total, &avail, &used, &reserved, &min);
	seq_printf(s, "total\t\t%d\n"
		   "avail\t\t%d\n"
		   "used\t\t%d\n"
		   "reserved\t%d\n"
		   "min\t%d\n",
		   total, avail, used, reserved, min);
	return 0;
}

static int dentry_lru_show(struct seq_file *s, void *ptr)
{
	struct ceph_fs_client *fsc = s->private;
	struct ceph_mds_client *mdsc = fsc->mdsc;
	struct ceph_dentry_info *di;

	spin_lock(&mdsc->dentry_lru_lock);
	list_for_each_entry(di, &mdsc->dentry_lru, lru) {
		struct dentry *dentry = di->dentry;
		seq_printf(s, "%p %p\t%pd\n",
			   di, dentry, dentry);
	}
	spin_unlock(&mdsc->dentry_lru_lock);

	return 0;
}

static int mds_sessions_show(struct seq_file *s, void *ptr)
{
	struct ceph_fs_client *fsc = s->private;
	struct ceph_mds_client *mdsc = fsc->mdsc;
	struct ceph_auth_client *ac = fsc->client->monc.auth;
	struct ceph_options *opt = fsc->client->options;
	int mds = -1;

	mutex_lock(&mdsc->mutex);

	/* The 'num' portion of an 'entity name' */
	seq_printf(s, "global_id %llu\n", ac->global_id);

	/* The -o name mount argument */
	seq_printf(s, "name \"%s\"\n", opt->name ? opt->name : "");

	/* The list of MDS session rank+state */
	for (mds = 0; mds < mdsc->max_sessions; mds++) {
		struct ceph_mds_session *session =
			__ceph_lookup_mds_session(mdsc, mds);
		if (!session) {
			continue;
		}
		mutex_unlock(&mdsc->mutex);
		seq_printf(s, "mds.%d %s\n",
				session->s_mds,
				ceph_session_state_name(session->s_state));

		ceph_put_mds_session(session);
		mutex_lock(&mdsc->mutex);
	}
	mutex_unlock(&mdsc->mutex);

	return 0;
}

CEPH_DEFINE_SHOW_FUNC(mdsmap_show)
CEPH_DEFINE_SHOW_FUNC(mdsc_show)
CEPH_DEFINE_SHOW_FUNC(caps_show)
CEPH_DEFINE_SHOW_FUNC(dentry_lru_show)
CEPH_DEFINE_SHOW_FUNC(mds_sessions_show)


/*
 * debugfs
 */
static int congestion_kb_set(void *data, u64 val)
{
	struct ceph_fs_client *fsc = (struct ceph_fs_client *)data;

	fsc->mount_options->congestion_kb = (int)val;
	return 0;
}

static int congestion_kb_get(void *data, u64 *val)
{
	struct ceph_fs_client *fsc = (struct ceph_fs_client *)data;

	*val = (u64)fsc->mount_options->congestion_kb;
	return 0;
}

DEFINE_SIMPLE_ATTRIBUTE(congestion_kb_fops, congestion_kb_get,
			congestion_kb_set, "%llu\n");


void ceph_fs_debugfs_cleanup(struct ceph_fs_client *fsc)
{
	dout("ceph_fs_debugfs_cleanup\n");
	debugfs_remove(fsc->debugfs_bdi);
	debugfs_remove(fsc->debugfs_congestion_kb);
	debugfs_remove(fsc->debugfs_mdsmap);
	debugfs_remove(fsc->debugfs_mds_sessions);
	debugfs_remove(fsc->debugfs_caps);
	debugfs_remove(fsc->debugfs_mdsc);
	debugfs_remove(fsc->debugfs_dentry_lru);
}

int ceph_fs_debugfs_init(struct ceph_fs_client *fsc)
{
	char name[100];
	int err = -ENOMEM;

	dout("ceph_fs_debugfs_init\n");
	BUG_ON(!fsc->client->debugfs_dir);
	fsc->debugfs_congestion_kb =
		debugfs_create_file("writeback_congestion_kb",
				    0600,
				    fsc->client->debugfs_dir,
				    fsc,
				    &congestion_kb_fops);
	if (!fsc->debugfs_congestion_kb)
		goto out;

	snprintf(name, sizeof(name), "../../bdi/%s",
		 dev_name(fsc->backing_dev_info.dev));
	fsc->debugfs_bdi =
		debugfs_create_symlink("bdi",
				       fsc->client->debugfs_dir,
				       name);
	if (!fsc->debugfs_bdi)
		goto out;

	fsc->debugfs_mdsmap = debugfs_create_file("mdsmap",
					0600,
					fsc->client->debugfs_dir,
					fsc,
					&mdsmap_show_fops);
	if (!fsc->debugfs_mdsmap)
		goto out;

	fsc->debugfs_mds_sessions = debugfs_create_file("mds_sessions",
					0600,
					fsc->client->debugfs_dir,
					fsc,
					&mds_sessions_show_fops);
	if (!fsc->debugfs_mds_sessions)
		goto out;

	fsc->debugfs_mdsc = debugfs_create_file("mdsc",
						0600,
						fsc->client->debugfs_dir,
						fsc,
						&mdsc_show_fops);
	if (!fsc->debugfs_mdsc)
		goto out;

	fsc->debugfs_caps = debugfs_create_file("caps",
						   0400,
						   fsc->client->debugfs_dir,
						   fsc,
						   &caps_show_fops);
	if (!fsc->debugfs_caps)
		goto out;

	fsc->debugfs_dentry_lru = debugfs_create_file("dentry_lru",
					0600,
					fsc->client->debugfs_dir,
					fsc,
					&dentry_lru_show_fops);
	if (!fsc->debugfs_dentry_lru)
		goto out;

	return 0;

out:
	ceph_fs_debugfs_cleanup(fsc);
	return err;
}


#else  /* CONFIG_DEBUG_FS */

int ceph_fs_debugfs_init(struct ceph_fs_client *fsc)
{
	return 0;
}

void ceph_fs_debugfs_cleanup(struct ceph_fs_client *fsc)
{
}

#endif  /* CONFIG_DEBUG_FS */
Commit	Line	Data
3d14c5d2	1	#include <linux/ceph/ceph_debug.h>
76aa844d	2
06edf046	3	#include <linux/device.h>
5a0e3ad6	4	#include <linux/slab.h>
76aa844d SW	5	#include <linux/module.h>
	6	#include <linux/ctype.h>
	7	#include <linux/debugfs.h>
	8	#include <linux/seq_file.h>
	9
3d14c5d2 YS	10	#include <linux/ceph/libceph.h>
	11	#include <linux/ceph/mon_client.h>
	12	#include <linux/ceph/auth.h>
	13	#include <linux/ceph/debugfs.h>
76aa844d	14
6f453ed6 RD	15	#include "super.h"
6f453ed6 RD	16
039934b8 SW	17	#ifdef CONFIG_DEBUG_FS
039934b8 SW	18
3d14c5d2	19	#include "mds_client.h"
76aa844d SW	20
	21	static int mdsmap_show(struct seq_file s, void p)
	22	{
	23	int i;
3d14c5d2	24	struct ceph_fs_client *fsc = s->private;
76aa844d	25
3d14c5d2	26	if (fsc->mdsc == NULL \|\| fsc->mdsc->mdsmap == NULL)
76aa844d	27	return 0;
3d14c5d2 YS	28	seq_printf(s, "epoch %d\n", fsc->mdsc->mdsmap->m_epoch);
3d14c5d2 YS	29	seq_printf(s, "root %d\n", fsc->mdsc->mdsmap->m_root);
76aa844d	30	seq_printf(s, "session_timeout %d\n",
3d14c5d2	31	fsc->mdsc->mdsmap->m_session_timeout);
76aa844d	32	seq_printf(s, "session_autoclose %d\n",
3d14c5d2 YS	33	fsc->mdsc->mdsmap->m_session_autoclose);
3d14c5d2 YS	34	for (i = 0; i < fsc->mdsc->mdsmap->m_max_mds; i++) {
76aa844d	35	struct ceph_entity_addr *addr =
3d14c5d2 YS	36	&fsc->mdsc->mdsmap->m_info[i].addr;
3d14c5d2 YS	37	int state = fsc->mdsc->mdsmap->m_info[i].state;
76aa844d	38
3d14c5d2 YS	39	seq_printf(s, "\tmds%d\t%s\t(%s)\n", i,
3d14c5d2 YS	40	ceph_pr_addr(&addr->in_addr),
76aa844d SW	41	ceph_mds_state_name(state));
	42	}
	43	return 0;
	44	}
	45
3d14c5d2 YS	46	/*
	47	* mdsc debugfs
	48	*/
76aa844d SW	49	static int mdsc_show(struct seq_file s, void p)
76aa844d SW	50	{
3d14c5d2 YS	51	struct ceph_fs_client *fsc = s->private;
3d14c5d2 YS	52	struct ceph_mds_client *mdsc = fsc->mdsc;
44ca18f2 SW	53	struct ceph_mds_request *req;
44ca18f2 SW	54	struct rb_node *rp;
76aa844d SW	55	int pathlen;
	56	u64 pathbase;
	57	char *path;
	58
	59	mutex_lock(&mdsc->mutex);
44ca18f2 SW	60	for (rp = rb_first(&mdsc->request_tree); rp; rp = rb_next(rp)) {
44ca18f2 SW	61	req = rb_entry(rp, struct ceph_mds_request, r_node);
76aa844d	62
4af25fdd SW	63	if (req->r_request && req->r_session)
	64	seq_printf(s, "%lld\tmds%d\t", req->r_tid,
	65	req->r_session->s_mds);
	66	else if (!req->r_request)
76aa844d	67	seq_printf(s, "%lld\t(no request)\t", req->r_tid);
4af25fdd SW	68	else
4af25fdd SW	69	seq_printf(s, "%lld\t(no session)\t", req->r_tid);
76aa844d SW	70
	71	seq_printf(s, "%s", ceph_mds_op_name(req->r_op));
	72
	73	if (req->r_got_unsafe)
3364d113	74	seq_puts(s, "\t(unsafe)");
76aa844d	75	else
3364d113	76	seq_puts(s, "\t");
76aa844d SW	77
	78	if (req->r_inode) {
	79	seq_printf(s, " #%llx", ceph_ino(req->r_inode));
	80	} else if (req->r_dentry) {
	81	path = ceph_mdsc_build_path(req->r_dentry, &pathlen,
	82	&pathbase, 0);
f44c3890 DC	83	if (IS_ERR(path))
f44c3890 DC	84	path = NULL;
76aa844d	85	spin_lock(&req->r_dentry->d_lock);
a455589f	86	seq_printf(s, " #%llx/%pd (%s)",
2b0143b5	87	ceph_ino(d_inode(req->r_dentry->d_parent)),
a455589f	88	req->r_dentry,
76aa844d SW	89	path ? path : "");
	90	spin_unlock(&req->r_dentry->d_lock);
	91	kfree(path);
	92	} else if (req->r_path1) {
	93	seq_printf(s, " #%llx/%s", req->r_ino1.ino,
	94	req->r_path1);
c137a32a YZ	95	} else {
c137a32a YZ	96	seq_printf(s, " #%llx", req->r_ino1.ino);
76aa844d SW	97	}
	98
	99	if (req->r_old_dentry) {
	100	path = ceph_mdsc_build_path(req->r_old_dentry, &pathlen,
	101	&pathbase, 0);
f44c3890 DC	102	if (IS_ERR(path))
f44c3890 DC	103	path = NULL;
76aa844d	104	spin_lock(&req->r_old_dentry->d_lock);
a455589f	105	seq_printf(s, " #%llx/%pd (%s)",
844d87c3 SW	106	req->r_old_dentry_dir ?
844d87c3 SW	107	ceph_ino(req->r_old_dentry_dir) : 0,
a455589f	108	req->r_old_dentry,
76aa844d SW	109	path ? path : "");
	110	spin_unlock(&req->r_old_dentry->d_lock);
	111	kfree(path);
aeda081c	112	} else if (req->r_path2 && req->r_op != CEPH_MDS_OP_SYMLINK) {
76aa844d SW	113	if (req->r_ino2.ino)
	114	seq_printf(s, " #%llx/%s", req->r_ino2.ino,
	115	req->r_path2);
	116	else
	117	seq_printf(s, " %s", req->r_path2);
	118	}
	119
3364d113	120	seq_puts(s, "\n");
76aa844d SW	121	}
	122	mutex_unlock(&mdsc->mutex);
	123
	124	return 0;
	125	}
	126
76aa844d SW	127	static int caps_show(struct seq_file s, void p)
76aa844d SW	128	{
3d14c5d2	129	struct ceph_fs_client *fsc = s->private;
85ccce43	130	int total, avail, used, reserved, min;
76aa844d	131
3d14c5d2	132	ceph_reservation_status(fsc, &total, &avail, &used, &reserved, &min);
76aa844d	133	seq_printf(s, "total\t\t%d\n"
85ccce43 SW	134	"avail\t\t%d\n"
	135	"used\t\t%d\n"
	136	"reserved\t%d\n"
	137	"min\t%d\n",
	138	total, avail, used, reserved, min);
76aa844d SW	139	return 0;
	140	}
	141
	142	static int dentry_lru_show(struct seq_file s, void ptr)
	143	{
3d14c5d2 YS	144	struct ceph_fs_client *fsc = s->private;
3d14c5d2 YS	145	struct ceph_mds_client *mdsc = fsc->mdsc;
76aa844d SW	146	struct ceph_dentry_info *di;
	147
	148	spin_lock(&mdsc->dentry_lru_lock);
	149	list_for_each_entry(di, &mdsc->dentry_lru, lru) {
	150	struct dentry *dentry = di->dentry;
a455589f AV	151	seq_printf(s, "%p %p\t%pd\n",
a455589f AV	152	di, dentry, dentry);
76aa844d SW	153	}
	154	spin_unlock(&mdsc->dentry_lru_lock);
	155
	156	return 0;
	157	}
	158
14ed9703 JS	159	static int mds_sessions_show(struct seq_file s, void ptr)
	160	{
	161	struct ceph_fs_client *fsc = s->private;
	162	struct ceph_mds_client *mdsc = fsc->mdsc;
	163	struct ceph_auth_client *ac = fsc->client->monc.auth;
	164	struct ceph_options *opt = fsc->client->options;
	165	int mds = -1;
	166
	167	mutex_lock(&mdsc->mutex);
	168
	169	/* The 'num' portion of an 'entity name' */
	170	seq_printf(s, "global_id %llu\n", ac->global_id);
	171
	172	/* The -o name mount argument */
	173	seq_printf(s, "name \"%s\"\n", opt->name ? opt->name : "");
	174
	175	/* The list of MDS session rank+state */
	176	for (mds = 0; mds < mdsc->max_sessions; mds++) {
	177	struct ceph_mds_session *session =
	178	__ceph_lookup_mds_session(mdsc, mds);
	179	if (!session) {
	180	continue;
	181	}
	182	mutex_unlock(&mdsc->mutex);
	183	seq_printf(s, "mds.%d %s\n",
	184	session->s_mds,
	185	ceph_session_state_name(session->s_state));
	186
	187	ceph_put_mds_session(session);
	188	mutex_lock(&mdsc->mutex);
	189	}
	190	mutex_unlock(&mdsc->mutex);
	191
	192	return 0;
	193	}
	194
3d14c5d2 YS	195	CEPH_DEFINE_SHOW_FUNC(mdsmap_show)
	196	CEPH_DEFINE_SHOW_FUNC(mdsc_show)
	197	CEPH_DEFINE_SHOW_FUNC(caps_show)
	198	CEPH_DEFINE_SHOW_FUNC(dentry_lru_show)
14ed9703	199	CEPH_DEFINE_SHOW_FUNC(mds_sessions_show)
3d14c5d2	200
76aa844d	201
3d14c5d2 YS	202	/*
	203	* debugfs
	204	*/
2baba250 YS	205	static int congestion_kb_set(void *data, u64 val)
2baba250 YS	206	{
3d14c5d2	207	struct ceph_fs_client fsc = (struct ceph_fs_client )data;
2baba250	208
3d14c5d2	209	fsc->mount_options->congestion_kb = (int)val;
2baba250 YS	210	return 0;
	211	}
	212
	213	static int congestion_kb_get(void data, u64 val)
	214	{
3d14c5d2	215	struct ceph_fs_client fsc = (struct ceph_fs_client )data;
2baba250	216
3d14c5d2	217	*val = (u64)fsc->mount_options->congestion_kb;
2baba250 YS	218	return 0;
	219	}
	220
2baba250 YS	221	DEFINE_SIMPLE_ATTRIBUTE(congestion_kb_fops, congestion_kb_get,
	222	congestion_kb_set, "%llu\n");
	223
76aa844d	224
3d14c5d2	225	void ceph_fs_debugfs_cleanup(struct ceph_fs_client *fsc)
76aa844d	226	{
3d14c5d2 YS	227	dout("ceph_fs_debugfs_cleanup\n");
	228	debugfs_remove(fsc->debugfs_bdi);
	229	debugfs_remove(fsc->debugfs_congestion_kb);
	230	debugfs_remove(fsc->debugfs_mdsmap);
14ed9703	231	debugfs_remove(fsc->debugfs_mds_sessions);
3d14c5d2 YS	232	debugfs_remove(fsc->debugfs_caps);
	233	debugfs_remove(fsc->debugfs_mdsc);
	234	debugfs_remove(fsc->debugfs_dentry_lru);
76aa844d SW	235	}
76aa844d SW	236
3d14c5d2	237	int ceph_fs_debugfs_init(struct ceph_fs_client *fsc)
76aa844d	238	{
3d14c5d2 YS	239	char name[100];
3d14c5d2 YS	240	int err = -ENOMEM;
76aa844d	241
3d14c5d2	242	dout("ceph_fs_debugfs_init\n");
d1c338a5	243	BUG_ON(!fsc->client->debugfs_dir);
3d14c5d2 YS	244	fsc->debugfs_congestion_kb =
	245	debugfs_create_file("writeback_congestion_kb",
	246	0600,
	247	fsc->client->debugfs_dir,
	248	fsc,
	249	&congestion_kb_fops);
	250	if (!fsc->debugfs_congestion_kb)
76aa844d SW	251	goto out;
76aa844d SW	252
3d14c5d2 YS	253	snprintf(name, sizeof(name), "../../bdi/%s",
	254	dev_name(fsc->backing_dev_info.dev));
	255	fsc->debugfs_bdi =
	256	debugfs_create_symlink("bdi",
	257	fsc->client->debugfs_dir,
	258	name);
	259	if (!fsc->debugfs_bdi)
76aa844d SW	260	goto out;
76aa844d SW	261
3d14c5d2	262	fsc->debugfs_mdsmap = debugfs_create_file("mdsmap",
76aa844d	263	0600,
3d14c5d2 YS	264	fsc->client->debugfs_dir,
3d14c5d2 YS	265	fsc,
76aa844d	266	&mdsmap_show_fops);
3d14c5d2	267	if (!fsc->debugfs_mdsmap)
76aa844d SW	268	goto out;
76aa844d SW	269
14ed9703 JS	270	fsc->debugfs_mds_sessions = debugfs_create_file("mds_sessions",
	271	0600,
	272	fsc->client->debugfs_dir,
	273	fsc,
	274	&mds_sessions_show_fops);
	275	if (!fsc->debugfs_mds_sessions)
	276	goto out;
	277
3d14c5d2 YS	278	fsc->debugfs_mdsc = debugfs_create_file("mdsc",
	279	0600,
	280	fsc->client->debugfs_dir,
	281	fsc,
	282	&mdsc_show_fops);
	283	if (!fsc->debugfs_mdsc)
76aa844d SW	284	goto out;
76aa844d SW	285
3d14c5d2	286	fsc->debugfs_caps = debugfs_create_file("caps",
76aa844d	287	0400,
3d14c5d2 YS	288	fsc->client->debugfs_dir,
3d14c5d2 YS	289	fsc,
76aa844d	290	&caps_show_fops);
3d14c5d2	291	if (!fsc->debugfs_caps)
76aa844d SW	292	goto out;
76aa844d SW	293
3d14c5d2 YS	294	fsc->debugfs_dentry_lru = debugfs_create_file("dentry_lru",
	295	0600,
	296	fsc->client->debugfs_dir,
	297	fsc,
	298	&dentry_lru_show_fops);
	299	if (!fsc->debugfs_dentry_lru)
2baba250 YS	300	goto out;
2baba250 YS	301
76aa844d SW	302	return 0;
	303
	304	out:
3d14c5d2 YS	305	ceph_fs_debugfs_cleanup(fsc);
3d14c5d2 YS	306	return err;
76aa844d SW	307	}
76aa844d SW	308
76aa844d	309
213c99ee	310	#else /* CONFIG_DEBUG_FS */
039934b8	311
3d14c5d2	312	int ceph_fs_debugfs_init(struct ceph_fs_client *fsc)
039934b8 SW	313	{
	314	return 0;
	315	}
	316
3d14c5d2	317	void ceph_fs_debugfs_cleanup(struct ceph_fs_client *fsc)
039934b8 SW	318	{
	319	}
	320
213c99ee	321	#endif /* CONFIG_DEBUG_FS */