xref: /openbmc/linux/fs/ceph/debugfs.c (revision b34e08d5)
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 
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  */
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_printf(s, "\t(unsafe)");
75 		else
76 			seq_printf(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/%.*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);
96 		} else {
97 			seq_printf(s, " #%llx", req->r_ino1.ino);
98 		}
99 
100 		if (req->r_old_dentry) {
101 			path = ceph_mdsc_build_path(req->r_old_dentry, &pathlen,
102 						    &pathbase, 0);
103 			if (IS_ERR(path))
104 				path = NULL;
105 			spin_lock(&req->r_old_dentry->d_lock);
106 			seq_printf(s, " #%llx/%.*s (%s)",
107 				   req->r_old_dentry_dir ?
108 				   ceph_ino(req->r_old_dentry_dir) : 0,
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 
122 		seq_printf(s, "\n");
123 	}
124 	mutex_unlock(&mdsc->mutex);
125 
126 	return 0;
127 }
128 
129 static int caps_show(struct seq_file *s, void *p)
130 {
131 	struct ceph_fs_client *fsc = s->private;
132 	int total, avail, used, reserved, min;
133 
134 	ceph_reservation_status(fsc, &total, &avail, &used, &reserved, &min);
135 	seq_printf(s, "total\t\t%d\n"
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);
141 	return 0;
142 }
143 
144 static int dentry_lru_show(struct seq_file *s, void *ptr)
145 {
146 	struct ceph_fs_client *fsc = s->private;
147 	struct ceph_mds_client *mdsc = fsc->mdsc;
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 
161 CEPH_DEFINE_SHOW_FUNC(mdsmap_show)
162 CEPH_DEFINE_SHOW_FUNC(mdsc_show)
163 CEPH_DEFINE_SHOW_FUNC(caps_show)
164 CEPH_DEFINE_SHOW_FUNC(dentry_lru_show)
165 
166 
167 /*
168  * debugfs
169  */
170 static int congestion_kb_set(void *data, u64 val)
171 {
172 	struct ceph_fs_client *fsc = (struct ceph_fs_client *)data;
173 
174 	fsc->mount_options->congestion_kb = (int)val;
175 	return 0;
176 }
177 
178 static int congestion_kb_get(void *data, u64 *val)
179 {
180 	struct ceph_fs_client *fsc = (struct ceph_fs_client *)data;
181 
182 	*val = (u64)fsc->mount_options->congestion_kb;
183 	return 0;
184 }
185 
186 DEFINE_SIMPLE_ATTRIBUTE(congestion_kb_fops, congestion_kb_get,
187 			congestion_kb_set, "%llu\n");
188 
189 
190 void ceph_fs_debugfs_cleanup(struct ceph_fs_client *fsc)
191 {
192 	dout("ceph_fs_debugfs_cleanup\n");
193 	debugfs_remove(fsc->debugfs_bdi);
194 	debugfs_remove(fsc->debugfs_congestion_kb);
195 	debugfs_remove(fsc->debugfs_mdsmap);
196 	debugfs_remove(fsc->debugfs_caps);
197 	debugfs_remove(fsc->debugfs_mdsc);
198 	debugfs_remove(fsc->debugfs_dentry_lru);
199 }
200 
201 int ceph_fs_debugfs_init(struct ceph_fs_client *fsc)
202 {
203 	char name[100];
204 	int err = -ENOMEM;
205 
206 	dout("ceph_fs_debugfs_init\n");
207 	BUG_ON(!fsc->client->debugfs_dir);
208 	fsc->debugfs_congestion_kb =
209 		debugfs_create_file("writeback_congestion_kb",
210 				    0600,
211 				    fsc->client->debugfs_dir,
212 				    fsc,
213 				    &congestion_kb_fops);
214 	if (!fsc->debugfs_congestion_kb)
215 		goto out;
216 
217 	snprintf(name, sizeof(name), "../../bdi/%s",
218 		 dev_name(fsc->backing_dev_info.dev));
219 	fsc->debugfs_bdi =
220 		debugfs_create_symlink("bdi",
221 				       fsc->client->debugfs_dir,
222 				       name);
223 	if (!fsc->debugfs_bdi)
224 		goto out;
225 
226 	fsc->debugfs_mdsmap = debugfs_create_file("mdsmap",
227 					0600,
228 					fsc->client->debugfs_dir,
229 					fsc,
230 					&mdsmap_show_fops);
231 	if (!fsc->debugfs_mdsmap)
232 		goto out;
233 
234 	fsc->debugfs_mdsc = debugfs_create_file("mdsc",
235 						0600,
236 						fsc->client->debugfs_dir,
237 						fsc,
238 						&mdsc_show_fops);
239 	if (!fsc->debugfs_mdsc)
240 		goto out;
241 
242 	fsc->debugfs_caps = debugfs_create_file("caps",
243 						   0400,
244 						   fsc->client->debugfs_dir,
245 						   fsc,
246 						   &caps_show_fops);
247 	if (!fsc->debugfs_caps)
248 		goto out;
249 
250 	fsc->debugfs_dentry_lru = debugfs_create_file("dentry_lru",
251 					0600,
252 					fsc->client->debugfs_dir,
253 					fsc,
254 					&dentry_lru_show_fops);
255 	if (!fsc->debugfs_dentry_lru)
256 		goto out;
257 
258 	return 0;
259 
260 out:
261 	ceph_fs_debugfs_cleanup(fsc);
262 	return err;
263 }
264 
265 
266 #else  /* CONFIG_DEBUG_FS */
267 
268 int ceph_fs_debugfs_init(struct ceph_fs_client *fsc)
269 {
270 	return 0;
271 }
272 
273 void ceph_fs_debugfs_cleanup(struct ceph_fs_client *fsc)
274 {
275 }
276 
277 #endif  /* CONFIG_DEBUG_FS */
278