xref: /openbmc/linux/fs/ceph/debugfs.c (revision c6fddb28)
1 // SPDX-License-Identifier: GPL-2.0
2 #include <linux/ceph/ceph_debug.h>
3 
4 #include <linux/device.h>
5 #include <linux/slab.h>
6 #include <linux/module.h>
7 #include <linux/ctype.h>
8 #include <linux/debugfs.h>
9 #include <linux/seq_file.h>
10 
11 #include <linux/ceph/libceph.h>
12 #include <linux/ceph/mon_client.h>
13 #include <linux/ceph/auth.h>
14 #include <linux/ceph/debugfs.h>
15 
16 #include "super.h"
17 
18 #ifdef CONFIG_DEBUG_FS
19 
20 #include "mds_client.h"
21 
22 static int mdsmap_show(struct seq_file *s, void *p)
23 {
24 	int i;
25 	struct ceph_fs_client *fsc = s->private;
26 	struct ceph_mdsmap *mdsmap;
27 
28 	if (!fsc->mdsc || !fsc->mdsc->mdsmap)
29 		return 0;
30 	mdsmap = fsc->mdsc->mdsmap;
31 	seq_printf(s, "epoch %d\n", mdsmap->m_epoch);
32 	seq_printf(s, "root %d\n", mdsmap->m_root);
33 	seq_printf(s, "max_mds %d\n", mdsmap->m_max_mds);
34 	seq_printf(s, "session_timeout %d\n", mdsmap->m_session_timeout);
35 	seq_printf(s, "session_autoclose %d\n", mdsmap->m_session_autoclose);
36 	for (i = 0; i < mdsmap->possible_max_rank; i++) {
37 		struct ceph_entity_addr *addr = &mdsmap->m_info[i].addr;
38 		int state = mdsmap->m_info[i].state;
39 		seq_printf(s, "\tmds%d\t%s\t(%s)\n", i,
40 			       ceph_pr_addr(addr),
41 			       ceph_mds_state_name(state));
42 	}
43 	return 0;
44 }
45 
46 /*
47  * mdsc debugfs
48  */
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 = 0;
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 (test_bit(CEPH_MDS_R_GOT_UNSAFE, &req->r_req_flags))
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 			ceph_mdsc_free_path(path, pathlen);
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 			ceph_mdsc_free_path(path, pathlen);
112 		} else if (req->r_path2 && req->r_op != CEPH_MDS_OP_SYMLINK) {
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 
127 static int caps_show_cb(struct inode *inode, struct ceph_cap *cap, void *p)
128 {
129 	struct seq_file *s = p;
130 
131 	seq_printf(s, "0x%-17lx%-17s%-17s\n", inode->i_ino,
132 		   ceph_cap_string(cap->issued),
133 		   ceph_cap_string(cap->implemented));
134 	return 0;
135 }
136 
137 static int caps_show(struct seq_file *s, void *p)
138 {
139 	struct ceph_fs_client *fsc = s->private;
140 	struct ceph_mds_client *mdsc = fsc->mdsc;
141 	int total, avail, used, reserved, min, i;
142 	struct cap_wait	*cw;
143 
144 	ceph_reservation_status(fsc, &total, &avail, &used, &reserved, &min);
145 	seq_printf(s, "total\t\t%d\n"
146 		   "avail\t\t%d\n"
147 		   "used\t\t%d\n"
148 		   "reserved\t%d\n"
149 		   "min\t\t%d\n\n",
150 		   total, avail, used, reserved, min);
151 	seq_printf(s, "ino                issued           implemented\n");
152 	seq_printf(s, "-----------------------------------------------\n");
153 
154 	mutex_lock(&mdsc->mutex);
155 	for (i = 0; i < mdsc->max_sessions; i++) {
156 		struct ceph_mds_session *session;
157 
158 		session = __ceph_lookup_mds_session(mdsc, i);
159 		if (!session)
160 			continue;
161 		mutex_unlock(&mdsc->mutex);
162 		mutex_lock(&session->s_mutex);
163 		ceph_iterate_session_caps(session, caps_show_cb, s);
164 		mutex_unlock(&session->s_mutex);
165 		ceph_put_mds_session(session);
166 		mutex_lock(&mdsc->mutex);
167 	}
168 	mutex_unlock(&mdsc->mutex);
169 
170 	seq_printf(s, "\n\nWaiters:\n--------\n");
171 	seq_printf(s, "tgid         ino                need             want\n");
172 	seq_printf(s, "-----------------------------------------------------\n");
173 
174 	spin_lock(&mdsc->caps_list_lock);
175 	list_for_each_entry(cw, &mdsc->cap_wait_list, list) {
176 		seq_printf(s, "%-13d0x%-17lx%-17s%-17s\n", cw->tgid, cw->ino,
177 				ceph_cap_string(cw->need),
178 				ceph_cap_string(cw->want));
179 	}
180 	spin_unlock(&mdsc->caps_list_lock);
181 
182 	return 0;
183 }
184 
185 static int mds_sessions_show(struct seq_file *s, void *ptr)
186 {
187 	struct ceph_fs_client *fsc = s->private;
188 	struct ceph_mds_client *mdsc = fsc->mdsc;
189 	struct ceph_auth_client *ac = fsc->client->monc.auth;
190 	struct ceph_options *opt = fsc->client->options;
191 	int mds = -1;
192 
193 	mutex_lock(&mdsc->mutex);
194 
195 	/* The 'num' portion of an 'entity name' */
196 	seq_printf(s, "global_id %llu\n", ac->global_id);
197 
198 	/* The -o name mount argument */
199 	seq_printf(s, "name \"%s\"\n", opt->name ? opt->name : "");
200 
201 	/* The list of MDS session rank+state */
202 	for (mds = 0; mds < mdsc->max_sessions; mds++) {
203 		struct ceph_mds_session *session =
204 			__ceph_lookup_mds_session(mdsc, mds);
205 		if (!session) {
206 			continue;
207 		}
208 		mutex_unlock(&mdsc->mutex);
209 		seq_printf(s, "mds.%d %s\n",
210 				session->s_mds,
211 				ceph_session_state_name(session->s_state));
212 
213 		ceph_put_mds_session(session);
214 		mutex_lock(&mdsc->mutex);
215 	}
216 	mutex_unlock(&mdsc->mutex);
217 
218 	return 0;
219 }
220 
221 DEFINE_SHOW_ATTRIBUTE(mdsmap);
222 DEFINE_SHOW_ATTRIBUTE(mdsc);
223 DEFINE_SHOW_ATTRIBUTE(caps);
224 DEFINE_SHOW_ATTRIBUTE(mds_sessions);
225 
226 
227 /*
228  * debugfs
229  */
230 static int congestion_kb_set(void *data, u64 val)
231 {
232 	struct ceph_fs_client *fsc = (struct ceph_fs_client *)data;
233 
234 	fsc->mount_options->congestion_kb = (int)val;
235 	return 0;
236 }
237 
238 static int congestion_kb_get(void *data, u64 *val)
239 {
240 	struct ceph_fs_client *fsc = (struct ceph_fs_client *)data;
241 
242 	*val = (u64)fsc->mount_options->congestion_kb;
243 	return 0;
244 }
245 
246 DEFINE_SIMPLE_ATTRIBUTE(congestion_kb_fops, congestion_kb_get,
247 			congestion_kb_set, "%llu\n");
248 
249 
250 void ceph_fs_debugfs_cleanup(struct ceph_fs_client *fsc)
251 {
252 	dout("ceph_fs_debugfs_cleanup\n");
253 	debugfs_remove(fsc->debugfs_bdi);
254 	debugfs_remove(fsc->debugfs_congestion_kb);
255 	debugfs_remove(fsc->debugfs_mdsmap);
256 	debugfs_remove(fsc->debugfs_mds_sessions);
257 	debugfs_remove(fsc->debugfs_caps);
258 	debugfs_remove(fsc->debugfs_mdsc);
259 }
260 
261 void ceph_fs_debugfs_init(struct ceph_fs_client *fsc)
262 {
263 	char name[100];
264 
265 	dout("ceph_fs_debugfs_init\n");
266 	fsc->debugfs_congestion_kb =
267 		debugfs_create_file("writeback_congestion_kb",
268 				    0600,
269 				    fsc->client->debugfs_dir,
270 				    fsc,
271 				    &congestion_kb_fops);
272 
273 	snprintf(name, sizeof(name), "../../bdi/%s",
274 		 dev_name(fsc->sb->s_bdi->dev));
275 	fsc->debugfs_bdi =
276 		debugfs_create_symlink("bdi",
277 				       fsc->client->debugfs_dir,
278 				       name);
279 
280 	fsc->debugfs_mdsmap = debugfs_create_file("mdsmap",
281 					0400,
282 					fsc->client->debugfs_dir,
283 					fsc,
284 					&mdsmap_fops);
285 
286 	fsc->debugfs_mds_sessions = debugfs_create_file("mds_sessions",
287 					0400,
288 					fsc->client->debugfs_dir,
289 					fsc,
290 					&mds_sessions_fops);
291 
292 	fsc->debugfs_mdsc = debugfs_create_file("mdsc",
293 						0400,
294 						fsc->client->debugfs_dir,
295 						fsc,
296 						&mdsc_fops);
297 
298 	fsc->debugfs_caps = debugfs_create_file("caps",
299 						   0400,
300 						   fsc->client->debugfs_dir,
301 						   fsc,
302 						   &caps_fops);
303 }
304 
305 
306 #else  /* CONFIG_DEBUG_FS */
307 
308 void ceph_fs_debugfs_init(struct ceph_fs_client *fsc)
309 {
310 }
311 
312 void ceph_fs_debugfs_cleanup(struct ceph_fs_client *fsc)
313 {
314 }
315 
316 #endif  /* CONFIG_DEBUG_FS */
317