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Merge tag 'io_uring-5.7-2020-05-22' of git://git.kernel.dk/linux-block
[thirdparty/linux.git] / fs / ceph / debugfs.c
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b2441318 1// SPDX-License-Identifier: GPL-2.0
3d14c5d2 2#include <linux/ceph/ceph_debug.h>
76aa844d 3
06edf046 4#include <linux/device.h>
5a0e3ad6 5#include <linux/slab.h>
76aa844d
SW
6#include <linux/module.h>
7#include <linux/ctype.h>
8#include <linux/debugfs.h>
9#include <linux/seq_file.h>
10
3d14c5d2
YS
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>
76aa844d 15
6f453ed6
RD
16#include "super.h"
17
039934b8
SW
18#ifdef CONFIG_DEBUG_FS
19
3d14c5d2 20#include "mds_client.h"
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21
22static int mdsmap_show(struct seq_file *s, void *p)
23{
24 int i;
3d14c5d2 25 struct ceph_fs_client *fsc = s->private;
76201b63 26 struct ceph_mdsmap *mdsmap;
76aa844d 27
d37b1d99 28 if (!fsc->mdsc || !fsc->mdsc->mdsmap)
76aa844d 29 return 0;
76201b63
YZ
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);
b38c9eb4 36 for (i = 0; i < mdsmap->possible_max_rank; i++) {
76201b63
YZ
37 struct ceph_entity_addr *addr = &mdsmap->m_info[i].addr;
38 int state = mdsmap->m_info[i].state;
3d14c5d2 39 seq_printf(s, "\tmds%d\t%s\t(%s)\n", i,
b726ec97 40 ceph_pr_addr(addr),
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41 ceph_mds_state_name(state));
42 }
43 return 0;
44}
45
3d14c5d2
YS
46/*
47 * mdsc debugfs
48 */
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49static int mdsc_show(struct seq_file *s, void *p)
50{
3d14c5d2
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51 struct ceph_fs_client *fsc = s->private;
52 struct ceph_mds_client *mdsc = fsc->mdsc;
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53 struct ceph_mds_request *req;
54 struct rb_node *rp;
13c41737 55 int pathlen = 0;
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56 u64 pathbase;
57 char *path;
58
59 mutex_lock(&mdsc->mutex);
44ca18f2
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60 for (rp = rb_first(&mdsc->request_tree); rp; rp = rb_next(rp)) {
61 req = rb_entry(rp, struct ceph_mds_request, r_node);
76aa844d 62
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SW
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)
76aa844d 67 seq_printf(s, "%lld\t(no request)\t", req->r_tid);
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68 else
69 seq_printf(s, "%lld\t(no session)\t", req->r_tid);
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70
71 seq_printf(s, "%s", ceph_mds_op_name(req->r_op));
72
bc2de10d 73 if (test_bit(CEPH_MDS_R_GOT_UNSAFE, &req->r_req_flags))
3364d113 74 seq_puts(s, "\t(unsafe)");
76aa844d 75 else
3364d113 76 seq_puts(s, "\t");
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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);
f44c3890
DC
83 if (IS_ERR(path))
84 path = NULL;
76aa844d 85 spin_lock(&req->r_dentry->d_lock);
a455589f 86 seq_printf(s, " #%llx/%pd (%s)",
2b0143b5 87 ceph_ino(d_inode(req->r_dentry->d_parent)),
a455589f 88 req->r_dentry,
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89 path ? path : "");
90 spin_unlock(&req->r_dentry->d_lock);
f77f21bb 91 ceph_mdsc_free_path(path, pathlen);
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92 } else if (req->r_path1) {
93 seq_printf(s, " #%llx/%s", req->r_ino1.ino,
94 req->r_path1);
c137a32a
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95 } else {
96 seq_printf(s, " #%llx", req->r_ino1.ino);
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SW
97 }
98
99 if (req->r_old_dentry) {
100 path = ceph_mdsc_build_path(req->r_old_dentry, &pathlen,
101 &pathbase, 0);
f44c3890
DC
102 if (IS_ERR(path))
103 path = NULL;
76aa844d 104 spin_lock(&req->r_old_dentry->d_lock);
a455589f 105 seq_printf(s, " #%llx/%pd (%s)",
844d87c3
SW
106 req->r_old_dentry_dir ?
107 ceph_ino(req->r_old_dentry_dir) : 0,
a455589f 108 req->r_old_dentry,
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109 path ? path : "");
110 spin_unlock(&req->r_old_dentry->d_lock);
f77f21bb 111 ceph_mdsc_free_path(path, pathlen);
aeda081c 112 } else if (req->r_path2 && req->r_op != CEPH_MDS_OP_SYMLINK) {
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SW
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
3364d113 120 seq_puts(s, "\n");
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SW
121 }
122 mutex_unlock(&mdsc->mutex);
123
124 return 0;
125}
126
ff4a80bf
JL
127static 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
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SW
137static int caps_show(struct seq_file *s, void *p)
138{
3d14c5d2 139 struct ceph_fs_client *fsc = s->private;
ff4a80bf
JL
140 struct ceph_mds_client *mdsc = fsc->mdsc;
141 int total, avail, used, reserved, min, i;
3a3430af 142 struct cap_wait *cw;
76aa844d 143
3d14c5d2 144 ceph_reservation_status(fsc, &total, &avail, &used, &reserved, &min);
76aa844d 145 seq_printf(s, "total\t\t%d\n"
85ccce43
SW
146 "avail\t\t%d\n"
147 "used\t\t%d\n"
148 "reserved\t%d\n"
ff4a80bf 149 "min\t\t%d\n\n",
85ccce43 150 total, avail, used, reserved, min);
ff4a80bf
JL
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
3a3430af
JL
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
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SW
182 return 0;
183}
184
14ed9703
JS
185static 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
072eaf3c
ID
221DEFINE_SHOW_ATTRIBUTE(mdsmap);
222DEFINE_SHOW_ATTRIBUTE(mdsc);
223DEFINE_SHOW_ATTRIBUTE(caps);
224DEFINE_SHOW_ATTRIBUTE(mds_sessions);
3d14c5d2 225
76aa844d 226
3d14c5d2
YS
227/*
228 * debugfs
229 */
2baba250
YS
230static int congestion_kb_set(void *data, u64 val)
231{
3d14c5d2 232 struct ceph_fs_client *fsc = (struct ceph_fs_client *)data;
2baba250 233
3d14c5d2 234 fsc->mount_options->congestion_kb = (int)val;
2baba250
YS
235 return 0;
236}
237
238static int congestion_kb_get(void *data, u64 *val)
239{
3d14c5d2 240 struct ceph_fs_client *fsc = (struct ceph_fs_client *)data;
2baba250 241
3d14c5d2 242 *val = (u64)fsc->mount_options->congestion_kb;
2baba250
YS
243 return 0;
244}
245
2baba250
YS
246DEFINE_SIMPLE_ATTRIBUTE(congestion_kb_fops, congestion_kb_get,
247 congestion_kb_set, "%llu\n");
248
76aa844d 249
3d14c5d2 250void ceph_fs_debugfs_cleanup(struct ceph_fs_client *fsc)
76aa844d 251{
3d14c5d2
YS
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);
14ed9703 256 debugfs_remove(fsc->debugfs_mds_sessions);
3d14c5d2
YS
257 debugfs_remove(fsc->debugfs_caps);
258 debugfs_remove(fsc->debugfs_mdsc);
76aa844d
SW
259}
260
1a829ff2 261void ceph_fs_debugfs_init(struct ceph_fs_client *fsc)
76aa844d 262{
3d14c5d2 263 char name[100];
76aa844d 264
3d14c5d2
YS
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);
76aa844d 272
3d14c5d2 273 snprintf(name, sizeof(name), "../../bdi/%s",
d51cfc53 274 bdi_dev_name(fsc->sb->s_bdi));
3d14c5d2
YS
275 fsc->debugfs_bdi =
276 debugfs_create_symlink("bdi",
277 fsc->client->debugfs_dir,
278 name);
76aa844d 279
3d14c5d2 280 fsc->debugfs_mdsmap = debugfs_create_file("mdsmap",
11e1478d 281 0400,
3d14c5d2
YS
282 fsc->client->debugfs_dir,
283 fsc,
072eaf3c 284 &mdsmap_fops);
76aa844d 285
14ed9703 286 fsc->debugfs_mds_sessions = debugfs_create_file("mds_sessions",
11e1478d 287 0400,
14ed9703
JS
288 fsc->client->debugfs_dir,
289 fsc,
072eaf3c 290 &mds_sessions_fops);
14ed9703 291
3d14c5d2 292 fsc->debugfs_mdsc = debugfs_create_file("mdsc",
11e1478d 293 0400,
3d14c5d2
YS
294 fsc->client->debugfs_dir,
295 fsc,
072eaf3c 296 &mdsc_fops);
76aa844d 297
3d14c5d2 298 fsc->debugfs_caps = debugfs_create_file("caps",
76aa844d 299 0400,
3d14c5d2
YS
300 fsc->client->debugfs_dir,
301 fsc,
072eaf3c 302 &caps_fops);
76aa844d
SW
303}
304
76aa844d 305
213c99ee 306#else /* CONFIG_DEBUG_FS */
039934b8 307
1a829ff2 308void ceph_fs_debugfs_init(struct ceph_fs_client *fsc)
039934b8 309{
039934b8
SW
310}
311
3d14c5d2 312void ceph_fs_debugfs_cleanup(struct ceph_fs_client *fsc)
039934b8
SW
313{
314}
315
213c99ee 316#endif /* CONFIG_DEBUG_FS */