1 // SPDX-License-Identifier: GPL-2.0
2 #include <linux/ceph/ceph_debug.h>
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 #include <linux/math64.h>
11 #include <linux/ktime.h>
13 #include <linux/ceph/libceph.h>
14 #include <linux/ceph/mon_client.h>
15 #include <linux/ceph/auth.h>
16 #include <linux/ceph/debugfs.h>
20 #ifdef CONFIG_DEBUG_FS
22 #include "mds_client.h"
25 static int mdsmap_show(struct seq_file *s, void *p)
28 struct ceph_fs_client *fsc = s->private;
29 struct ceph_mdsmap *mdsmap;
31 if (!fsc->mdsc || !fsc->mdsc->mdsmap)
33 mdsmap = fsc->mdsc->mdsmap;
34 seq_printf(s, "epoch %d\n", mdsmap->m_epoch);
35 seq_printf(s, "root %d\n", mdsmap->m_root);
36 seq_printf(s, "max_mds %d\n", mdsmap->m_max_mds);
37 seq_printf(s, "session_timeout %d\n", mdsmap->m_session_timeout);
38 seq_printf(s, "session_autoclose %d\n", mdsmap->m_session_autoclose);
39 for (i = 0; i < mdsmap->possible_max_rank; i++) {
40 struct ceph_entity_addr *addr = &mdsmap->m_info[i].addr;
41 int state = mdsmap->m_info[i].state;
42 seq_printf(s, "\tmds%d\t%s\t(%s)\n", i,
44 ceph_mds_state_name(state));
52 static int mdsc_show(struct seq_file *s, void *p)
54 struct ceph_fs_client *fsc = s->private;
55 struct ceph_mds_client *mdsc = fsc->mdsc;
56 struct ceph_mds_request *req;
62 mutex_lock(&mdsc->mutex);
63 for (rp = rb_first(&mdsc->request_tree); rp; rp = rb_next(rp)) {
64 req = rb_entry(rp, struct ceph_mds_request, r_node);
66 if (req->r_request && req->r_session)
67 seq_printf(s, "%lld\tmds%d\t", req->r_tid,
68 req->r_session->s_mds);
69 else if (!req->r_request)
70 seq_printf(s, "%lld\t(no request)\t", req->r_tid);
72 seq_printf(s, "%lld\t(no session)\t", req->r_tid);
74 seq_printf(s, "%s", ceph_mds_op_name(req->r_op));
76 if (test_bit(CEPH_MDS_R_GOT_UNSAFE, &req->r_req_flags))
77 seq_puts(s, "\t(unsafe)");
82 seq_printf(s, " #%llx", ceph_ino(req->r_inode));
83 } else if (req->r_dentry) {
84 path = ceph_mdsc_build_path(req->r_dentry, &pathlen,
88 spin_lock(&req->r_dentry->d_lock);
89 seq_printf(s, " #%llx/%pd (%s)",
90 ceph_ino(d_inode(req->r_dentry->d_parent)),
93 spin_unlock(&req->r_dentry->d_lock);
94 ceph_mdsc_free_path(path, pathlen);
95 } else if (req->r_path1) {
96 seq_printf(s, " #%llx/%s", req->r_ino1.ino,
99 seq_printf(s, " #%llx", req->r_ino1.ino);
102 if (req->r_old_dentry) {
103 path = ceph_mdsc_build_path(req->r_old_dentry, &pathlen,
107 spin_lock(&req->r_old_dentry->d_lock);
108 seq_printf(s, " #%llx/%pd (%s)",
109 req->r_old_dentry_dir ?
110 ceph_ino(req->r_old_dentry_dir) : 0,
113 spin_unlock(&req->r_old_dentry->d_lock);
114 ceph_mdsc_free_path(path, pathlen);
115 } else if (req->r_path2 && req->r_op != CEPH_MDS_OP_SYMLINK) {
117 seq_printf(s, " #%llx/%s", req->r_ino2.ino,
120 seq_printf(s, " %s", req->r_path2);
125 mutex_unlock(&mdsc->mutex);
130 #define CEPH_METRIC_SHOW(name, total, avg, min, max, sq) { \
131 s64 _total, _avg, _min, _max, _sq, _st; \
132 _avg = ktime_to_us(avg); \
133 _min = ktime_to_us(min == KTIME_MAX ? 0 : min); \
134 _max = ktime_to_us(max); \
135 _total = total - 1; \
136 _sq = _total > 0 ? DIV64_U64_ROUND_CLOSEST(sq, _total) : 0; \
137 _st = int_sqrt64(_sq); \
138 _st = ktime_to_us(_st); \
139 seq_printf(s, "%-14s%-12lld%-16lld%-16lld%-16lld%lld\n", \
140 name, total, _avg, _min, _max, _st); \
143 static int metric_show(struct seq_file *s, void *p)
145 struct ceph_fs_client *fsc = s->private;
146 struct ceph_mds_client *mdsc = fsc->mdsc;
147 struct ceph_client_metric *m = &mdsc->metric;
149 s64 total, sum, avg, min, max, sq;
151 seq_printf(s, "item total avg_lat(us) min_lat(us) max_lat(us) stdev(us)\n");
152 seq_printf(s, "-----------------------------------------------------------------------------------\n");
154 spin_lock(&m->read_latency_lock);
155 total = m->total_reads;
156 sum = m->read_latency_sum;
157 avg = total > 0 ? DIV64_U64_ROUND_CLOSEST(sum, total) : 0;
158 min = m->read_latency_min;
159 max = m->read_latency_max;
160 sq = m->read_latency_sq_sum;
161 spin_unlock(&m->read_latency_lock);
162 CEPH_METRIC_SHOW("read", total, avg, min, max, sq);
164 spin_lock(&m->write_latency_lock);
165 total = m->total_writes;
166 sum = m->write_latency_sum;
167 avg = total > 0 ? DIV64_U64_ROUND_CLOSEST(sum, total) : 0;
168 min = m->write_latency_min;
169 max = m->write_latency_max;
170 sq = m->write_latency_sq_sum;
171 spin_unlock(&m->write_latency_lock);
172 CEPH_METRIC_SHOW("write", total, avg, min, max, sq);
174 spin_lock(&m->metadata_latency_lock);
175 total = m->total_metadatas;
176 sum = m->metadata_latency_sum;
177 avg = total > 0 ? DIV64_U64_ROUND_CLOSEST(sum, total) : 0;
178 min = m->metadata_latency_min;
179 max = m->metadata_latency_max;
180 sq = m->metadata_latency_sq_sum;
181 spin_unlock(&m->metadata_latency_lock);
182 CEPH_METRIC_SHOW("metadata", total, avg, min, max, sq);
185 seq_printf(s, "item total miss hit\n");
186 seq_printf(s, "-------------------------------------------------\n");
188 seq_printf(s, "%-14s%-16lld%-16lld%lld\n", "d_lease",
189 atomic64_read(&m->total_dentries),
190 percpu_counter_sum(&m->d_lease_mis),
191 percpu_counter_sum(&m->d_lease_hit));
193 nr_caps = atomic64_read(&m->total_caps);
194 seq_printf(s, "%-14s%-16d%-16lld%lld\n", "caps", nr_caps,
195 percpu_counter_sum(&m->i_caps_mis),
196 percpu_counter_sum(&m->i_caps_hit));
201 static int caps_show_cb(struct inode *inode, struct ceph_cap *cap, void *p)
203 struct seq_file *s = p;
205 seq_printf(s, "0x%-17llx%-17s%-17s\n", ceph_ino(inode),
206 ceph_cap_string(cap->issued),
207 ceph_cap_string(cap->implemented));
211 static int caps_show(struct seq_file *s, void *p)
213 struct ceph_fs_client *fsc = s->private;
214 struct ceph_mds_client *mdsc = fsc->mdsc;
215 int total, avail, used, reserved, min, i;
218 ceph_reservation_status(fsc, &total, &avail, &used, &reserved, &min);
219 seq_printf(s, "total\t\t%d\n"
224 total, avail, used, reserved, min);
225 seq_printf(s, "ino issued implemented\n");
226 seq_printf(s, "-----------------------------------------------\n");
228 mutex_lock(&mdsc->mutex);
229 for (i = 0; i < mdsc->max_sessions; i++) {
230 struct ceph_mds_session *session;
232 session = __ceph_lookup_mds_session(mdsc, i);
235 mutex_unlock(&mdsc->mutex);
236 mutex_lock(&session->s_mutex);
237 ceph_iterate_session_caps(session, caps_show_cb, s);
238 mutex_unlock(&session->s_mutex);
239 ceph_put_mds_session(session);
240 mutex_lock(&mdsc->mutex);
242 mutex_unlock(&mdsc->mutex);
244 seq_printf(s, "\n\nWaiters:\n--------\n");
245 seq_printf(s, "tgid ino need want\n");
246 seq_printf(s, "-----------------------------------------------------\n");
248 spin_lock(&mdsc->caps_list_lock);
249 list_for_each_entry(cw, &mdsc->cap_wait_list, list) {
250 seq_printf(s, "%-13d0x%-17llx%-17s%-17s\n", cw->tgid, cw->ino,
251 ceph_cap_string(cw->need),
252 ceph_cap_string(cw->want));
254 spin_unlock(&mdsc->caps_list_lock);
259 static int mds_sessions_show(struct seq_file *s, void *ptr)
261 struct ceph_fs_client *fsc = s->private;
262 struct ceph_mds_client *mdsc = fsc->mdsc;
263 struct ceph_auth_client *ac = fsc->client->monc.auth;
264 struct ceph_options *opt = fsc->client->options;
267 mutex_lock(&mdsc->mutex);
269 /* The 'num' portion of an 'entity name' */
270 seq_printf(s, "global_id %llu\n", ac->global_id);
272 /* The -o name mount argument */
273 seq_printf(s, "name \"%s\"\n", opt->name ? opt->name : "");
275 /* The list of MDS session rank+state */
276 for (mds = 0; mds < mdsc->max_sessions; mds++) {
277 struct ceph_mds_session *session =
278 __ceph_lookup_mds_session(mdsc, mds);
282 mutex_unlock(&mdsc->mutex);
283 seq_printf(s, "mds.%d %s\n",
285 ceph_session_state_name(session->s_state));
287 ceph_put_mds_session(session);
288 mutex_lock(&mdsc->mutex);
290 mutex_unlock(&mdsc->mutex);
295 DEFINE_SHOW_ATTRIBUTE(mdsmap);
296 DEFINE_SHOW_ATTRIBUTE(mdsc);
297 DEFINE_SHOW_ATTRIBUTE(caps);
298 DEFINE_SHOW_ATTRIBUTE(mds_sessions);
299 DEFINE_SHOW_ATTRIBUTE(metric);
305 static int congestion_kb_set(void *data, u64 val)
307 struct ceph_fs_client *fsc = (struct ceph_fs_client *)data;
309 fsc->mount_options->congestion_kb = (int)val;
313 static int congestion_kb_get(void *data, u64 *val)
315 struct ceph_fs_client *fsc = (struct ceph_fs_client *)data;
317 *val = (u64)fsc->mount_options->congestion_kb;
321 DEFINE_SIMPLE_ATTRIBUTE(congestion_kb_fops, congestion_kb_get,
322 congestion_kb_set, "%llu\n");
325 void ceph_fs_debugfs_cleanup(struct ceph_fs_client *fsc)
327 dout("ceph_fs_debugfs_cleanup\n");
328 debugfs_remove(fsc->debugfs_bdi);
329 debugfs_remove(fsc->debugfs_congestion_kb);
330 debugfs_remove(fsc->debugfs_mdsmap);
331 debugfs_remove(fsc->debugfs_mds_sessions);
332 debugfs_remove(fsc->debugfs_caps);
333 debugfs_remove(fsc->debugfs_metric);
334 debugfs_remove(fsc->debugfs_mdsc);
337 void ceph_fs_debugfs_init(struct ceph_fs_client *fsc)
341 dout("ceph_fs_debugfs_init\n");
342 fsc->debugfs_congestion_kb =
343 debugfs_create_file("writeback_congestion_kb",
345 fsc->client->debugfs_dir,
347 &congestion_kb_fops);
349 snprintf(name, sizeof(name), "../../bdi/%s",
350 bdi_dev_name(fsc->sb->s_bdi));
352 debugfs_create_symlink("bdi",
353 fsc->client->debugfs_dir,
356 fsc->debugfs_mdsmap = debugfs_create_file("mdsmap",
358 fsc->client->debugfs_dir,
362 fsc->debugfs_mds_sessions = debugfs_create_file("mds_sessions",
364 fsc->client->debugfs_dir,
368 fsc->debugfs_mdsc = debugfs_create_file("mdsc",
370 fsc->client->debugfs_dir,
374 fsc->debugfs_metric = debugfs_create_file("metrics",
376 fsc->client->debugfs_dir,
380 fsc->debugfs_caps = debugfs_create_file("caps",
382 fsc->client->debugfs_dir,
388 #else /* CONFIG_DEBUG_FS */
390 void ceph_fs_debugfs_init(struct ceph_fs_client *fsc)
394 void ceph_fs_debugfs_cleanup(struct ceph_fs_client *fsc)
398 #endif /* CONFIG_DEBUG_FS */