Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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kernel
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linux
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
22static 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->m_num_mds; 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->in_addr),
41 ceph_mds_state_name(state));
42 }
43 return 0;
44}
45
46/*
47 * mdsc debugfs
48 */
49static 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 (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 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 && 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
127static 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
142static int mds_sessions_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_auth_client *ac = fsc->client->monc.auth;
147 struct ceph_options *opt = fsc->client->options;
148 int mds = -1;
149
150 mutex_lock(&mdsc->mutex);
151
152 /* The 'num' portion of an 'entity name' */
153 seq_printf(s, "global_id %llu\n", ac->global_id);
154
155 /* The -o name mount argument */
156 seq_printf(s, "name \"%s\"\n", opt->name ? opt->name : "");
157
158 /* The list of MDS session rank+state */
159 for (mds = 0; mds < mdsc->max_sessions; mds++) {
160 struct ceph_mds_session *session =
161 __ceph_lookup_mds_session(mdsc, mds);
162 if (!session) {
163 continue;
164 }
165 mutex_unlock(&mdsc->mutex);
166 seq_printf(s, "mds.%d %s\n",
167 session->s_mds,
168 ceph_session_state_name(session->s_state));
169
170 ceph_put_mds_session(session);
171 mutex_lock(&mdsc->mutex);
172 }
173 mutex_unlock(&mdsc->mutex);
174
175 return 0;
176}
177
178CEPH_DEFINE_SHOW_FUNC(mdsmap_show)
179CEPH_DEFINE_SHOW_FUNC(mdsc_show)
180CEPH_DEFINE_SHOW_FUNC(caps_show)
181CEPH_DEFINE_SHOW_FUNC(mds_sessions_show)
182
183
184/*
185 * debugfs
186 */
187static int congestion_kb_set(void *data, u64 val)
188{
189 struct ceph_fs_client *fsc = (struct ceph_fs_client *)data;
190
191 fsc->mount_options->congestion_kb = (int)val;
192 return 0;
193}
194
195static int congestion_kb_get(void *data, u64 *val)
196{
197 struct ceph_fs_client *fsc = (struct ceph_fs_client *)data;
198
199 *val = (u64)fsc->mount_options->congestion_kb;
200 return 0;
201}
202
203DEFINE_SIMPLE_ATTRIBUTE(congestion_kb_fops, congestion_kb_get,
204 congestion_kb_set, "%llu\n");
205
206
207void ceph_fs_debugfs_cleanup(struct ceph_fs_client *fsc)
208{
209 dout("ceph_fs_debugfs_cleanup\n");
210 debugfs_remove(fsc->debugfs_bdi);
211 debugfs_remove(fsc->debugfs_congestion_kb);
212 debugfs_remove(fsc->debugfs_mdsmap);
213 debugfs_remove(fsc->debugfs_mds_sessions);
214 debugfs_remove(fsc->debugfs_caps);
215 debugfs_remove(fsc->debugfs_mdsc);
216}
217
218int ceph_fs_debugfs_init(struct ceph_fs_client *fsc)
219{
220 char name[100];
221 int err = -ENOMEM;
222
223 dout("ceph_fs_debugfs_init\n");
224 BUG_ON(!fsc->client->debugfs_dir);
225 fsc->debugfs_congestion_kb =
226 debugfs_create_file("writeback_congestion_kb",
227 0600,
228 fsc->client->debugfs_dir,
229 fsc,
230 &congestion_kb_fops);
231 if (!fsc->debugfs_congestion_kb)
232 goto out;
233
234 snprintf(name, sizeof(name), "../../bdi/%s",
235 dev_name(fsc->sb->s_bdi->dev));
236 fsc->debugfs_bdi =
237 debugfs_create_symlink("bdi",
238 fsc->client->debugfs_dir,
239 name);
240 if (!fsc->debugfs_bdi)
241 goto out;
242
243 fsc->debugfs_mdsmap = debugfs_create_file("mdsmap",
244 0400,
245 fsc->client->debugfs_dir,
246 fsc,
247 &mdsmap_show_fops);
248 if (!fsc->debugfs_mdsmap)
249 goto out;
250
251 fsc->debugfs_mds_sessions = debugfs_create_file("mds_sessions",
252 0400,
253 fsc->client->debugfs_dir,
254 fsc,
255 &mds_sessions_show_fops);
256 if (!fsc->debugfs_mds_sessions)
257 goto out;
258
259 fsc->debugfs_mdsc = debugfs_create_file("mdsc",
260 0400,
261 fsc->client->debugfs_dir,
262 fsc,
263 &mdsc_show_fops);
264 if (!fsc->debugfs_mdsc)
265 goto out;
266
267 fsc->debugfs_caps = debugfs_create_file("caps",
268 0400,
269 fsc->client->debugfs_dir,
270 fsc,
271 &caps_show_fops);
272 if (!fsc->debugfs_caps)
273 goto out;
274
275 return 0;
276
277out:
278 ceph_fs_debugfs_cleanup(fsc);
279 return err;
280}
281
282
283#else /* CONFIG_DEBUG_FS */
284
285int ceph_fs_debugfs_init(struct ceph_fs_client *fsc)
286{
287 return 0;
288}
289
290void ceph_fs_debugfs_cleanup(struct ceph_fs_client *fsc)
291{
292}
293
294#endif /* CONFIG_DEBUG_FS */