[deliverable/linux.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/%.*s (%s)",
				   ceph_ino(req->r_dentry->d_parent->d_inode),
				   req->r_dentry->d_name.len,
				   req->r_dentry->d_name.name,
				   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/%.*s (%s)",
				   req->r_old_dentry_dir ?
				   ceph_ino(req->r_old_dentry_dir) : 0,
				   req->r_old_dentry->d_name.len,
				   req->r_old_dentry->d_name.name,
				   path ? path : "");
			spin_unlock(&req->r_old_dentry->d_lock);
			kfree(path);
		} else if (req->r_path2) {
			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%.*s\n",
			   di, dentry, dentry->d_name.len, dentry->d_name.name);
	}
	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 SW	85	spin_lock(&req->r_dentry->d_lock);
	86	seq_printf(s, " #%llx/%.*s (%s)",
	87	ceph_ino(req->r_dentry->d_parent->d_inode),
	88	req->r_dentry->d_name.len,
	89	req->r_dentry->d_name.name,
	90	path ? path : "");
	91	spin_unlock(&req->r_dentry->d_lock);
	92	kfree(path);
	93	} else if (req->r_path1) {
	94	seq_printf(s, " #%llx/%s", req->r_ino1.ino,
	95	req->r_path1);
c137a32a YZ	96	} else {
c137a32a YZ	97	seq_printf(s, " #%llx", req->r_ino1.ino);
76aa844d SW	98	}
	99
	100	if (req->r_old_dentry) {
	101	path = ceph_mdsc_build_path(req->r_old_dentry, &pathlen,
	102	&pathbase, 0);
f44c3890 DC	103	if (IS_ERR(path))
f44c3890 DC	104	path = NULL;
76aa844d SW	105	spin_lock(&req->r_old_dentry->d_lock);
76aa844d SW	106	seq_printf(s, " #%llx/%.*s (%s)",
844d87c3 SW	107	req->r_old_dentry_dir ?
844d87c3 SW	108	ceph_ino(req->r_old_dentry_dir) : 0,
76aa844d SW	109	req->r_old_dentry->d_name.len,
	110	req->r_old_dentry->d_name.name,
	111	path ? path : "");
	112	spin_unlock(&req->r_old_dentry->d_lock);
	113	kfree(path);
	114	} else if (req->r_path2) {
	115	if (req->r_ino2.ino)
	116	seq_printf(s, " #%llx/%s", req->r_ino2.ino,
	117	req->r_path2);
	118	else
	119	seq_printf(s, " %s", req->r_path2);
	120	}
	121
3364d113	122	seq_puts(s, "\n");
76aa844d SW	123	}
	124	mutex_unlock(&mdsc->mutex);
	125
	126	return 0;
	127	}
	128
76aa844d SW	129	static int caps_show(struct seq_file s, void p)
76aa844d SW	130	{
3d14c5d2	131	struct ceph_fs_client *fsc = s->private;
85ccce43	132	int total, avail, used, reserved, min;
76aa844d	133
3d14c5d2	134	ceph_reservation_status(fsc, &total, &avail, &used, &reserved, &min);
76aa844d	135	seq_printf(s, "total\t\t%d\n"
85ccce43 SW	136	"avail\t\t%d\n"
	137	"used\t\t%d\n"
	138	"reserved\t%d\n"
	139	"min\t%d\n",
	140	total, avail, used, reserved, min);
76aa844d SW	141	return 0;
	142	}
	143
	144	static int dentry_lru_show(struct seq_file s, void ptr)
	145	{
3d14c5d2 YS	146	struct ceph_fs_client *fsc = s->private;
3d14c5d2 YS	147	struct ceph_mds_client *mdsc = fsc->mdsc;
76aa844d SW	148	struct ceph_dentry_info *di;
	149
	150	spin_lock(&mdsc->dentry_lru_lock);
	151	list_for_each_entry(di, &mdsc->dentry_lru, lru) {
	152	struct dentry *dentry = di->dentry;
	153	seq_printf(s, "%p %p\t%.*s\n",
	154	di, dentry, dentry->d_name.len, dentry->d_name.name);
	155	}
	156	spin_unlock(&mdsc->dentry_lru_lock);
	157
	158	return 0;
	159	}
	160
14ed9703 JS	161	static int mds_sessions_show(struct seq_file s, void ptr)
	162	{
	163	struct ceph_fs_client *fsc = s->private;
	164	struct ceph_mds_client *mdsc = fsc->mdsc;
	165	struct ceph_auth_client *ac = fsc->client->monc.auth;
	166	struct ceph_options *opt = fsc->client->options;
	167	int mds = -1;
	168
	169	mutex_lock(&mdsc->mutex);
	170
	171	/* The 'num' portion of an 'entity name' */
	172	seq_printf(s, "global_id %llu\n", ac->global_id);
	173
	174	/* The -o name mount argument */
	175	seq_printf(s, "name \"%s\"\n", opt->name ? opt->name : "");
	176
	177	/* The list of MDS session rank+state */
	178	for (mds = 0; mds < mdsc->max_sessions; mds++) {
	179	struct ceph_mds_session *session =
	180	__ceph_lookup_mds_session(mdsc, mds);
	181	if (!session) {
	182	continue;
	183	}
	184	mutex_unlock(&mdsc->mutex);
	185	seq_printf(s, "mds.%d %s\n",
	186	session->s_mds,
	187	ceph_session_state_name(session->s_state));
	188
	189	ceph_put_mds_session(session);
	190	mutex_lock(&mdsc->mutex);
	191	}
	192	mutex_unlock(&mdsc->mutex);
	193
	194	return 0;
	195	}
	196
3d14c5d2 YS	197	CEPH_DEFINE_SHOW_FUNC(mdsmap_show)
	198	CEPH_DEFINE_SHOW_FUNC(mdsc_show)
	199	CEPH_DEFINE_SHOW_FUNC(caps_show)
	200	CEPH_DEFINE_SHOW_FUNC(dentry_lru_show)
14ed9703	201	CEPH_DEFINE_SHOW_FUNC(mds_sessions_show)
3d14c5d2	202
76aa844d	203
3d14c5d2 YS	204	/*
	205	* debugfs
	206	*/
2baba250 YS	207	static int congestion_kb_set(void *data, u64 val)
2baba250 YS	208	{
3d14c5d2	209	struct ceph_fs_client fsc = (struct ceph_fs_client )data;
2baba250	210
3d14c5d2	211	fsc->mount_options->congestion_kb = (int)val;
2baba250 YS	212	return 0;
	213	}
	214
	215	static int congestion_kb_get(void data, u64 val)
	216	{
3d14c5d2	217	struct ceph_fs_client fsc = (struct ceph_fs_client )data;
2baba250	218
3d14c5d2	219	*val = (u64)fsc->mount_options->congestion_kb;
2baba250 YS	220	return 0;
	221	}
	222
2baba250 YS	223	DEFINE_SIMPLE_ATTRIBUTE(congestion_kb_fops, congestion_kb_get,
	224	congestion_kb_set, "%llu\n");
	225
76aa844d	226
3d14c5d2	227	void ceph_fs_debugfs_cleanup(struct ceph_fs_client *fsc)
76aa844d	228	{
3d14c5d2 YS	229	dout("ceph_fs_debugfs_cleanup\n");
	230	debugfs_remove(fsc->debugfs_bdi);
	231	debugfs_remove(fsc->debugfs_congestion_kb);
	232	debugfs_remove(fsc->debugfs_mdsmap);
14ed9703	233	debugfs_remove(fsc->debugfs_mds_sessions);
3d14c5d2 YS	234	debugfs_remove(fsc->debugfs_caps);
	235	debugfs_remove(fsc->debugfs_mdsc);
	236	debugfs_remove(fsc->debugfs_dentry_lru);
76aa844d SW	237	}
76aa844d SW	238
3d14c5d2	239	int ceph_fs_debugfs_init(struct ceph_fs_client *fsc)
76aa844d	240	{
3d14c5d2 YS	241	char name[100];
3d14c5d2 YS	242	int err = -ENOMEM;
76aa844d	243
3d14c5d2	244	dout("ceph_fs_debugfs_init\n");
d1c338a5	245	BUG_ON(!fsc->client->debugfs_dir);
3d14c5d2 YS	246	fsc->debugfs_congestion_kb =
	247	debugfs_create_file("writeback_congestion_kb",
	248	0600,
	249	fsc->client->debugfs_dir,
	250	fsc,
	251	&congestion_kb_fops);
	252	if (!fsc->debugfs_congestion_kb)
76aa844d SW	253	goto out;
76aa844d SW	254
3d14c5d2 YS	255	snprintf(name, sizeof(name), "../../bdi/%s",
	256	dev_name(fsc->backing_dev_info.dev));
	257	fsc->debugfs_bdi =
	258	debugfs_create_symlink("bdi",
	259	fsc->client->debugfs_dir,
	260	name);
	261	if (!fsc->debugfs_bdi)
76aa844d SW	262	goto out;
76aa844d SW	263
3d14c5d2	264	fsc->debugfs_mdsmap = debugfs_create_file("mdsmap",
76aa844d	265	0600,
3d14c5d2 YS	266	fsc->client->debugfs_dir,
3d14c5d2 YS	267	fsc,
76aa844d	268	&mdsmap_show_fops);
3d14c5d2	269	if (!fsc->debugfs_mdsmap)
76aa844d SW	270	goto out;
76aa844d SW	271
14ed9703 JS	272	fsc->debugfs_mds_sessions = debugfs_create_file("mds_sessions",
	273	0600,
	274	fsc->client->debugfs_dir,
	275	fsc,
	276	&mds_sessions_show_fops);
	277	if (!fsc->debugfs_mds_sessions)
	278	goto out;
	279
3d14c5d2 YS	280	fsc->debugfs_mdsc = debugfs_create_file("mdsc",
	281	0600,
	282	fsc->client->debugfs_dir,
	283	fsc,
	284	&mdsc_show_fops);
	285	if (!fsc->debugfs_mdsc)
76aa844d SW	286	goto out;
76aa844d SW	287
3d14c5d2	288	fsc->debugfs_caps = debugfs_create_file("caps",
76aa844d	289	0400,
3d14c5d2 YS	290	fsc->client->debugfs_dir,
3d14c5d2 YS	291	fsc,
76aa844d	292	&caps_show_fops);
3d14c5d2	293	if (!fsc->debugfs_caps)
76aa844d SW	294	goto out;
76aa844d SW	295
3d14c5d2 YS	296	fsc->debugfs_dentry_lru = debugfs_create_file("dentry_lru",
	297	0600,
	298	fsc->client->debugfs_dir,
	299	fsc,
	300	&dentry_lru_show_fops);
	301	if (!fsc->debugfs_dentry_lru)
2baba250 YS	302	goto out;
2baba250 YS	303
76aa844d SW	304	return 0;
	305
	306	out:
3d14c5d2 YS	307	ceph_fs_debugfs_cleanup(fsc);
3d14c5d2 YS	308	return err;
76aa844d SW	309	}
76aa844d SW	310
76aa844d	311
213c99ee	312	#else /* CONFIG_DEBUG_FS */
039934b8	313
3d14c5d2	314	int ceph_fs_debugfs_init(struct ceph_fs_client *fsc)
039934b8 SW	315	{
	316	return 0;
	317	}
	318
3d14c5d2	319	void ceph_fs_debugfs_cleanup(struct ceph_fs_client *fsc)
039934b8 SW	320	{
	321	}
	322
213c99ee	323	#endif /* CONFIG_DEBUG_FS */