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
mdsmap_show(struct seq_file * s,void * p)21 static 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 */
mdsc_show(struct seq_file * s,void * p)49 static 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
caps_show(struct seq_file * s,void * p)127 static 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
dentry_lru_show(struct seq_file * s,void * ptr)142 static 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
mds_sessions_show(struct seq_file * s,void * ptr)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
195 CEPH_DEFINE_SHOW_FUNC(mdsmap_show)
CEPH_DEFINE_SHOW_FUNC(mdsc_show)196 CEPH_DEFINE_SHOW_FUNC(mdsc_show)
197 CEPH_DEFINE_SHOW_FUNC(caps_show)
198 CEPH_DEFINE_SHOW_FUNC(dentry_lru_show)
199 CEPH_DEFINE_SHOW_FUNC(mds_sessions_show)
200
201
202 /*
203 * debugfs
204 */
205 static 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
congestion_kb_get(void * data,u64 * val)213 static 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
221 DEFINE_SIMPLE_ATTRIBUTE(congestion_kb_fops, congestion_kb_get,
222 congestion_kb_set, "%llu\n");
223
224
ceph_fs_debugfs_cleanup(struct ceph_fs_client * fsc)225 void 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
ceph_fs_debugfs_init(struct ceph_fs_client * fsc)237 int 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
304 out:
305 ceph_fs_debugfs_cleanup(fsc);
306 return err;
307 }
308
309
310 #else /* CONFIG_DEBUG_FS */
311
ceph_fs_debugfs_init(struct ceph_fs_client * fsc)312 int ceph_fs_debugfs_init(struct ceph_fs_client *fsc)
313 {
314 return 0;
315 }
316
ceph_fs_debugfs_cleanup(struct ceph_fs_client * fsc)317 void ceph_fs_debugfs_cleanup(struct ceph_fs_client *fsc)
318 {
319 }
320
321 #endif /* CONFIG_DEBUG_FS */
322