[mirror_ubuntu-artful-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;
	struct ceph_mdsmap *mdsmap;

	if (fsc->mdsc == NULL || fsc->mdsc->mdsmap == NULL)
		return 0;
	mdsmap = fsc->mdsc->mdsmap;
	seq_printf(s, "epoch %d\n", mdsmap->m_epoch);
	seq_printf(s, "root %d\n", mdsmap->m_root);
	seq_printf(s, "max_mds %d\n", mdsmap->m_max_mds);
	seq_printf(s, "session_timeout %d\n", mdsmap->m_session_timeout);
	seq_printf(s, "session_autoclose %d\n", mdsmap->m_session_autoclose);
	for (i = 0; i < mdsmap->m_num_mds; i++) {
		struct ceph_entity_addr *addr = &mdsmap->m_info[i].addr;
		int state = 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 (test_bit(CEPH_MDS_R_GOT_UNSAFE, &req->r_req_flags))
			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->sb->s_bdi->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;
76201b63	25	struct ceph_mdsmap *mdsmap;
76aa844d	26
3d14c5d2	27	if (fsc->mdsc == NULL \|\| fsc->mdsc->mdsmap == NULL)
76aa844d	28	return 0;
76201b63 YZ	29	mdsmap = fsc->mdsc->mdsmap;
	30	seq_printf(s, "epoch %d\n", mdsmap->m_epoch);
	31	seq_printf(s, "root %d\n", mdsmap->m_root);
	32	seq_printf(s, "max_mds %d\n", mdsmap->m_max_mds);
	33	seq_printf(s, "session_timeout %d\n", mdsmap->m_session_timeout);
	34	seq_printf(s, "session_autoclose %d\n", mdsmap->m_session_autoclose);
	35	for (i = 0; i < mdsmap->m_num_mds; i++) {
	36	struct ceph_entity_addr *addr = &mdsmap->m_info[i].addr;
	37	int state = mdsmap->m_info[i].state;
3d14c5d2 YS	38	seq_printf(s, "\tmds%d\t%s\t(%s)\n", i,
3d14c5d2 YS	39	ceph_pr_addr(&addr->in_addr),
76aa844d SW	40	ceph_mds_state_name(state));
	41	}
	42	return 0;
	43	}
	44
3d14c5d2 YS	45	/*
	46	* mdsc debugfs
	47	*/
76aa844d SW	48	static int mdsc_show(struct seq_file s, void p)
76aa844d SW	49	{
3d14c5d2 YS	50	struct ceph_fs_client *fsc = s->private;
3d14c5d2 YS	51	struct ceph_mds_client *mdsc = fsc->mdsc;
44ca18f2 SW	52	struct ceph_mds_request *req;
44ca18f2 SW	53	struct rb_node *rp;
76aa844d SW	54	int pathlen;
	55	u64 pathbase;
	56	char *path;
	57
	58	mutex_lock(&mdsc->mutex);
44ca18f2 SW	59	for (rp = rb_first(&mdsc->request_tree); rp; rp = rb_next(rp)) {
44ca18f2 SW	60	req = rb_entry(rp, struct ceph_mds_request, r_node);
76aa844d	61
4af25fdd SW	62	if (req->r_request && req->r_session)
	63	seq_printf(s, "%lld\tmds%d\t", req->r_tid,
	64	req->r_session->s_mds);
	65	else if (!req->r_request)
76aa844d	66	seq_printf(s, "%lld\t(no request)\t", req->r_tid);
4af25fdd SW	67	else
4af25fdd SW	68	seq_printf(s, "%lld\t(no session)\t", req->r_tid);
76aa844d SW	69
	70	seq_printf(s, "%s", ceph_mds_op_name(req->r_op));
	71
bc2de10d	72	if (test_bit(CEPH_MDS_R_GOT_UNSAFE, &req->r_req_flags))
3364d113	73	seq_puts(s, "\t(unsafe)");
76aa844d	74	else
3364d113	75	seq_puts(s, "\t");
76aa844d SW	76
	77	if (req->r_inode) {
	78	seq_printf(s, " #%llx", ceph_ino(req->r_inode));
	79	} else if (req->r_dentry) {
	80	path = ceph_mdsc_build_path(req->r_dentry, &pathlen,
	81	&pathbase, 0);
f44c3890 DC	82	if (IS_ERR(path))
f44c3890 DC	83	path = NULL;
76aa844d	84	spin_lock(&req->r_dentry->d_lock);
a455589f	85	seq_printf(s, " #%llx/%pd (%s)",
2b0143b5	86	ceph_ino(d_inode(req->r_dentry->d_parent)),
a455589f	87	req->r_dentry,
76aa844d SW	88	path ? path : "");
	89	spin_unlock(&req->r_dentry->d_lock);
	90	kfree(path);
	91	} else if (req->r_path1) {
	92	seq_printf(s, " #%llx/%s", req->r_ino1.ino,
	93	req->r_path1);
c137a32a YZ	94	} else {
c137a32a YZ	95	seq_printf(s, " #%llx", req->r_ino1.ino);
76aa844d SW	96	}
	97
	98	if (req->r_old_dentry) {
	99	path = ceph_mdsc_build_path(req->r_old_dentry, &pathlen,
	100	&pathbase, 0);
f44c3890 DC	101	if (IS_ERR(path))
f44c3890 DC	102	path = NULL;
76aa844d	103	spin_lock(&req->r_old_dentry->d_lock);
a455589f	104	seq_printf(s, " #%llx/%pd (%s)",
844d87c3 SW	105	req->r_old_dentry_dir ?
844d87c3 SW	106	ceph_ino(req->r_old_dentry_dir) : 0,
a455589f	107	req->r_old_dentry,
76aa844d SW	108	path ? path : "");
	109	spin_unlock(&req->r_old_dentry->d_lock);
	110	kfree(path);
aeda081c	111	} else if (req->r_path2 && req->r_op != CEPH_MDS_OP_SYMLINK) {
76aa844d SW	112	if (req->r_ino2.ino)
	113	seq_printf(s, " #%llx/%s", req->r_ino2.ino,
	114	req->r_path2);
	115	else
	116	seq_printf(s, " %s", req->r_path2);
	117	}
	118
3364d113	119	seq_puts(s, "\n");
76aa844d SW	120	}
	121	mutex_unlock(&mdsc->mutex);
	122
	123	return 0;
	124	}
	125
76aa844d SW	126	static int caps_show(struct seq_file s, void p)
76aa844d SW	127	{
3d14c5d2	128	struct ceph_fs_client *fsc = s->private;
85ccce43	129	int total, avail, used, reserved, min;
76aa844d	130
3d14c5d2	131	ceph_reservation_status(fsc, &total, &avail, &used, &reserved, &min);
76aa844d	132	seq_printf(s, "total\t\t%d\n"
85ccce43 SW	133	"avail\t\t%d\n"
	134	"used\t\t%d\n"
	135	"reserved\t%d\n"
	136	"min\t%d\n",
	137	total, avail, used, reserved, min);
76aa844d SW	138	return 0;
	139	}
	140
	141	static int dentry_lru_show(struct seq_file s, void ptr)
	142	{
3d14c5d2 YS	143	struct ceph_fs_client *fsc = s->private;
3d14c5d2 YS	144	struct ceph_mds_client *mdsc = fsc->mdsc;
76aa844d SW	145	struct ceph_dentry_info *di;
	146
	147	spin_lock(&mdsc->dentry_lru_lock);
	148	list_for_each_entry(di, &mdsc->dentry_lru, lru) {
	149	struct dentry *dentry = di->dentry;
a455589f AV	150	seq_printf(s, "%p %p\t%pd\n",
a455589f AV	151	di, dentry, dentry);
76aa844d SW	152	}
	153	spin_unlock(&mdsc->dentry_lru_lock);
	154
	155	return 0;
	156	}
	157
14ed9703 JS	158	static int mds_sessions_show(struct seq_file s, void ptr)
	159	{
	160	struct ceph_fs_client *fsc = s->private;
	161	struct ceph_mds_client *mdsc = fsc->mdsc;
	162	struct ceph_auth_client *ac = fsc->client->monc.auth;
	163	struct ceph_options *opt = fsc->client->options;
	164	int mds = -1;
	165
	166	mutex_lock(&mdsc->mutex);
	167
	168	/* The 'num' portion of an 'entity name' */
	169	seq_printf(s, "global_id %llu\n", ac->global_id);
	170
	171	/* The -o name mount argument */
	172	seq_printf(s, "name \"%s\"\n", opt->name ? opt->name : "");
	173
	174	/* The list of MDS session rank+state */
	175	for (mds = 0; mds < mdsc->max_sessions; mds++) {
	176	struct ceph_mds_session *session =
	177	__ceph_lookup_mds_session(mdsc, mds);
	178	if (!session) {
	179	continue;
	180	}
	181	mutex_unlock(&mdsc->mutex);
	182	seq_printf(s, "mds.%d %s\n",
	183	session->s_mds,
	184	ceph_session_state_name(session->s_state));
	185
	186	ceph_put_mds_session(session);
	187	mutex_lock(&mdsc->mutex);
	188	}
	189	mutex_unlock(&mdsc->mutex);
	190
	191	return 0;
	192	}
	193
3d14c5d2 YS	194	CEPH_DEFINE_SHOW_FUNC(mdsmap_show)
	195	CEPH_DEFINE_SHOW_FUNC(mdsc_show)
	196	CEPH_DEFINE_SHOW_FUNC(caps_show)
	197	CEPH_DEFINE_SHOW_FUNC(dentry_lru_show)
14ed9703	198	CEPH_DEFINE_SHOW_FUNC(mds_sessions_show)
3d14c5d2	199
76aa844d	200
3d14c5d2 YS	201	/*
	202	* debugfs
	203	*/
2baba250 YS	204	static int congestion_kb_set(void *data, u64 val)
2baba250 YS	205	{
3d14c5d2	206	struct ceph_fs_client fsc = (struct ceph_fs_client )data;
2baba250	207
3d14c5d2	208	fsc->mount_options->congestion_kb = (int)val;
2baba250 YS	209	return 0;
	210	}
	211
	212	static int congestion_kb_get(void data, u64 val)
	213	{
3d14c5d2	214	struct ceph_fs_client fsc = (struct ceph_fs_client )data;
2baba250	215
3d14c5d2	216	*val = (u64)fsc->mount_options->congestion_kb;
2baba250 YS	217	return 0;
	218	}
	219
2baba250 YS	220	DEFINE_SIMPLE_ATTRIBUTE(congestion_kb_fops, congestion_kb_get,
	221	congestion_kb_set, "%llu\n");
	222
76aa844d	223
3d14c5d2	224	void ceph_fs_debugfs_cleanup(struct ceph_fs_client *fsc)
76aa844d	225	{
3d14c5d2 YS	226	dout("ceph_fs_debugfs_cleanup\n");
	227	debugfs_remove(fsc->debugfs_bdi);
	228	debugfs_remove(fsc->debugfs_congestion_kb);
	229	debugfs_remove(fsc->debugfs_mdsmap);
14ed9703	230	debugfs_remove(fsc->debugfs_mds_sessions);
3d14c5d2 YS	231	debugfs_remove(fsc->debugfs_caps);
	232	debugfs_remove(fsc->debugfs_mdsc);
	233	debugfs_remove(fsc->debugfs_dentry_lru);
76aa844d SW	234	}
76aa844d SW	235
3d14c5d2	236	int ceph_fs_debugfs_init(struct ceph_fs_client *fsc)
76aa844d	237	{
3d14c5d2 YS	238	char name[100];
3d14c5d2 YS	239	int err = -ENOMEM;
76aa844d	240
3d14c5d2	241	dout("ceph_fs_debugfs_init\n");
d1c338a5	242	BUG_ON(!fsc->client->debugfs_dir);
3d14c5d2 YS	243	fsc->debugfs_congestion_kb =
	244	debugfs_create_file("writeback_congestion_kb",
	245	0600,
	246	fsc->client->debugfs_dir,
	247	fsc,
	248	&congestion_kb_fops);
	249	if (!fsc->debugfs_congestion_kb)
76aa844d SW	250	goto out;
76aa844d SW	251
3d14c5d2	252	snprintf(name, sizeof(name), "../../bdi/%s",
09dc9fc2	253	dev_name(fsc->sb->s_bdi->dev));
3d14c5d2 YS	254	fsc->debugfs_bdi =
	255	debugfs_create_symlink("bdi",
	256	fsc->client->debugfs_dir,
	257	name);
	258	if (!fsc->debugfs_bdi)
76aa844d SW	259	goto out;
76aa844d SW	260
3d14c5d2	261	fsc->debugfs_mdsmap = debugfs_create_file("mdsmap",
76aa844d	262	0600,
3d14c5d2 YS	263	fsc->client->debugfs_dir,
3d14c5d2 YS	264	fsc,
76aa844d	265	&mdsmap_show_fops);
3d14c5d2	266	if (!fsc->debugfs_mdsmap)
76aa844d SW	267	goto out;
76aa844d SW	268
14ed9703 JS	269	fsc->debugfs_mds_sessions = debugfs_create_file("mds_sessions",
	270	0600,
	271	fsc->client->debugfs_dir,
	272	fsc,
	273	&mds_sessions_show_fops);
	274	if (!fsc->debugfs_mds_sessions)
	275	goto out;
	276
3d14c5d2 YS	277	fsc->debugfs_mdsc = debugfs_create_file("mdsc",
	278	0600,
	279	fsc->client->debugfs_dir,
	280	fsc,
	281	&mdsc_show_fops);
	282	if (!fsc->debugfs_mdsc)
76aa844d SW	283	goto out;
76aa844d SW	284
3d14c5d2	285	fsc->debugfs_caps = debugfs_create_file("caps",
76aa844d	286	0400,
3d14c5d2 YS	287	fsc->client->debugfs_dir,
3d14c5d2 YS	288	fsc,
76aa844d	289	&caps_show_fops);
3d14c5d2	290	if (!fsc->debugfs_caps)
76aa844d SW	291	goto out;
76aa844d SW	292
3d14c5d2 YS	293	fsc->debugfs_dentry_lru = debugfs_create_file("dentry_lru",
	294	0600,
	295	fsc->client->debugfs_dir,
	296	fsc,
	297	&dentry_lru_show_fops);
	298	if (!fsc->debugfs_dentry_lru)
2baba250 YS	299	goto out;
2baba250 YS	300
76aa844d SW	301	return 0;
	302
	303	out:
3d14c5d2 YS	304	ceph_fs_debugfs_cleanup(fsc);
3d14c5d2 YS	305	return err;
76aa844d SW	306	}
76aa844d SW	307
76aa844d	308
213c99ee	309	#else /* CONFIG_DEBUG_FS */
039934b8	310
3d14c5d2	311	int ceph_fs_debugfs_init(struct ceph_fs_client *fsc)
039934b8 SW	312	{
	313	return 0;
	314	}
	315
3d14c5d2	316	void ceph_fs_debugfs_cleanup(struct ceph_fs_client *fsc)
039934b8 SW	317	{
	318	}
	319
213c99ee	320	#endif /* CONFIG_DEBUG_FS */