1#include <linux/ceph/ceph_debug.h>
2
3#include <linux/device.h>
4#include <linux/slab.h>
5#include <linux/module.h>
6#include <linux/ctype.h>
7#include <linux/debugfs.h>
8#include <linux/seq_file.h>
9
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>
14
15#include "super.h"
16
17#ifdef CONFIG_DEBUG_FS
18
19#include "mds_client.h"
20
21static int mdsmap_show(struct seq_file *s, void *p)
22{
23	int i;
24	struct ceph_fs_client *fsc = s->private;
25
26	if (fsc->mdsc == NULL || fsc->mdsc->mdsmap == NULL)
27		return 0;
28	seq_printf(s, "epoch %d\n", fsc->mdsc->mdsmap->m_epoch);
29	seq_printf(s, "root %d\n", fsc->mdsc->mdsmap->m_root);
30	seq_printf(s, "session_timeout %d\n",
31		       fsc->mdsc->mdsmap->m_session_timeout);
32	seq_printf(s, "session_autoclose %d\n",
33		       fsc->mdsc->mdsmap->m_session_autoclose);
34	for (i = 0; i < fsc->mdsc->mdsmap->m_max_mds; i++) {
35		struct ceph_entity_addr *addr =
36			&fsc->mdsc->mdsmap->m_info[i].addr;
37		int state = fsc->mdsc->mdsmap->m_info[i].state;
38
39		seq_printf(s, "\tmds%d\t%s\t(%s)\n", i,
40			       ceph_pr_addr(&addr->in_addr),
41			       ceph_mds_state_name(state));
42	}
43	return 0;
44}
45
46/*
47 * mdsc debugfs
48 */
49static int mdsc_show(struct seq_file *s, void *p)
50{
51	struct ceph_fs_client *fsc = s->private;
52	struct ceph_mds_client *mdsc = fsc->mdsc;
53	struct ceph_mds_request *req;
54	struct rb_node *rp;
55	int pathlen;
56	u64 pathbase;
57	char *path;
58
59	mutex_lock(&mdsc->mutex);
60	for (rp = rb_first(&mdsc->request_tree); rp; rp = rb_next(rp)) {
61		req = rb_entry(rp, struct ceph_mds_request, r_node);
62
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)
67			seq_printf(s, "%lld\t(no request)\t", req->r_tid);
68		else
69			seq_printf(s, "%lld\t(no session)\t", req->r_tid);
70
71		seq_printf(s, "%s", ceph_mds_op_name(req->r_op));
72
73		if (req->r_got_unsafe)
74			seq_puts(s, "\t(unsafe)");
75		else
76			seq_puts(s, "\t");
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);
83			if (IS_ERR(path))
84				path = NULL;
85			spin_lock(&req->r_dentry->d_lock);
86			seq_printf(s, " #%llx/%pd (%s)",
87				   ceph_ino(d_inode(req->r_dentry->d_parent)),
88				   req->r_dentry,
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);
95		} else {
96			seq_printf(s, " #%llx", req->r_ino1.ino);
97		}
98
99		if (req->r_old_dentry) {
100			path = ceph_mdsc_build_path(req->r_old_dentry, &pathlen,
101						    &pathbase, 0);
102			if (IS_ERR(path))
103				path = NULL;
104			spin_lock(&req->r_old_dentry->d_lock);
105			seq_printf(s, " #%llx/%pd (%s)",
106				   req->r_old_dentry_dir ?
107				   ceph_ino(req->r_old_dentry_dir) : 0,
108				   req->r_old_dentry,
109				   path ? path : "");
110			spin_unlock(&req->r_old_dentry->d_lock);
111			kfree(path);
112		} else if (req->r_path2) {
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
120		seq_puts(s, "\n");
121	}
122	mutex_unlock(&mdsc->mutex);
123
124	return 0;
125}
126
127static int caps_show(struct seq_file *s, void *p)
128{
129	struct ceph_fs_client *fsc = s->private;
130	int total, avail, used, reserved, min;
131
132	ceph_reservation_status(fsc, &total, &avail, &used, &reserved, &min);
133	seq_printf(s, "total\t\t%d\n"
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);
139	return 0;
140}
141
142static int dentry_lru_show(struct seq_file *s, void *ptr)
143{
144	struct ceph_fs_client *fsc = s->private;
145	struct ceph_mds_client *mdsc = fsc->mdsc;
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;
151		seq_printf(s, "%p %p\t%pd\n",
152			   di, dentry, dentry);
153	}
154	spin_unlock(&mdsc->dentry_lru_lock);
155
156	return 0;
157}
158
159static 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
195CEPH_DEFINE_SHOW_FUNC(mdsmap_show)
196CEPH_DEFINE_SHOW_FUNC(mdsc_show)
197CEPH_DEFINE_SHOW_FUNC(caps_show)
198CEPH_DEFINE_SHOW_FUNC(dentry_lru_show)
199CEPH_DEFINE_SHOW_FUNC(mds_sessions_show)
200
201
202/*
203 * debugfs
204 */
205static int congestion_kb_set(void *data, u64 val)
206{
207	struct ceph_fs_client *fsc = (struct ceph_fs_client *)data;
208
209	fsc->mount_options->congestion_kb = (int)val;
210	return 0;
211}
212
213static int congestion_kb_get(void *data, u64 *val)
214{
215	struct ceph_fs_client *fsc = (struct ceph_fs_client *)data;
216
217	*val = (u64)fsc->mount_options->congestion_kb;
218	return 0;
219}
220
221DEFINE_SIMPLE_ATTRIBUTE(congestion_kb_fops, congestion_kb_get,
222			congestion_kb_set, "%llu\n");
223
224
225void ceph_fs_debugfs_cleanup(struct ceph_fs_client *fsc)
226{
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);
231	debugfs_remove(fsc->debugfs_mds_sessions);
232	debugfs_remove(fsc->debugfs_caps);
233	debugfs_remove(fsc->debugfs_mdsc);
234	debugfs_remove(fsc->debugfs_dentry_lru);
235}
236
237int ceph_fs_debugfs_init(struct ceph_fs_client *fsc)
238{
239	char name[100];
240	int err = -ENOMEM;
241
242	dout("ceph_fs_debugfs_init\n");
243	BUG_ON(!fsc->client->debugfs_dir);
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)
251		goto out;
252
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)
260		goto out;
261
262	fsc->debugfs_mdsmap = debugfs_create_file("mdsmap",
263					0600,
264					fsc->client->debugfs_dir,
265					fsc,
266					&mdsmap_show_fops);
267	if (!fsc->debugfs_mdsmap)
268		goto out;
269
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
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)
284		goto out;
285
286	fsc->debugfs_caps = debugfs_create_file("caps",
287						   0400,
288						   fsc->client->debugfs_dir,
289						   fsc,
290						   &caps_show_fops);
291	if (!fsc->debugfs_caps)
292		goto out;
293
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)
300		goto out;
301
302	return 0;
303
304out:
305	ceph_fs_debugfs_cleanup(fsc);
306	return err;
307}
308
309
310#else  /* CONFIG_DEBUG_FS */
311
312int ceph_fs_debugfs_init(struct ceph_fs_client *fsc)
313{
314	return 0;
315}
316
317void ceph_fs_debugfs_cleanup(struct ceph_fs_client *fsc)
318{
319}
320
321#endif  /* CONFIG_DEBUG_FS */
322