libceph: fix socket write error handling
[linux-2.6.git] / net / ceph / debugfs.c
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 #ifdef CONFIG_DEBUG_FS
16
17 /*
18  * Implement /sys/kernel/debug/ceph fun
19  *
20  * /sys/kernel/debug/ceph/client*  - an instance of the ceph client
21  *      .../osdmap      - current osdmap
22  *      .../monmap      - current monmap
23  *      .../osdc        - active osd requests
24  *      .../monc        - mon client state
25  *      .../dentry_lru  - dump contents of dentry lru
26  *      .../caps        - expose cap (reservation) stats
27  *      .../bdi         - symlink to ../../bdi/something
28  */
29
30 static struct dentry *ceph_debugfs_dir;
31
32 static int monmap_show(struct seq_file *s, void *p)
33 {
34         int i;
35         struct ceph_client *client = s->private;
36
37         if (client->monc.monmap == NULL)
38                 return 0;
39
40         seq_printf(s, "epoch %d\n", client->monc.monmap->epoch);
41         for (i = 0; i < client->monc.monmap->num_mon; i++) {
42                 struct ceph_entity_inst *inst =
43                         &client->monc.monmap->mon_inst[i];
44
45                 seq_printf(s, "\t%s%lld\t%s\n",
46                            ENTITY_NAME(inst->name),
47                            ceph_pr_addr(&inst->addr.in_addr));
48         }
49         return 0;
50 }
51
52 static int osdmap_show(struct seq_file *s, void *p)
53 {
54         int i;
55         struct ceph_client *client = s->private;
56         struct rb_node *n;
57
58         if (client->osdc.osdmap == NULL)
59                 return 0;
60         seq_printf(s, "epoch %d\n", client->osdc.osdmap->epoch);
61         seq_printf(s, "flags%s%s\n",
62                    (client->osdc.osdmap->flags & CEPH_OSDMAP_NEARFULL) ?
63                    " NEARFULL" : "",
64                    (client->osdc.osdmap->flags & CEPH_OSDMAP_FULL) ?
65                    " FULL" : "");
66         for (n = rb_first(&client->osdc.osdmap->pg_pools); n; n = rb_next(n)) {
67                 struct ceph_pg_pool_info *pool =
68                         rb_entry(n, struct ceph_pg_pool_info, node);
69                 seq_printf(s, "pg_pool %d pg_num %d / %d, lpg_num %d / %d\n",
70                            pool->id, pool->v.pg_num, pool->pg_num_mask,
71                            pool->v.lpg_num, pool->lpg_num_mask);
72         }
73         for (i = 0; i < client->osdc.osdmap->max_osd; i++) {
74                 struct ceph_entity_addr *addr =
75                         &client->osdc.osdmap->osd_addr[i];
76                 int state = client->osdc.osdmap->osd_state[i];
77                 char sb[64];
78
79                 seq_printf(s, "\tosd%d\t%s\t%3d%%\t(%s)\n",
80                            i, ceph_pr_addr(&addr->in_addr),
81                            ((client->osdc.osdmap->osd_weight[i]*100) >> 16),
82                            ceph_osdmap_state_str(sb, sizeof(sb), state));
83         }
84         return 0;
85 }
86
87 static int monc_show(struct seq_file *s, void *p)
88 {
89         struct ceph_client *client = s->private;
90         struct ceph_mon_generic_request *req;
91         struct ceph_mon_client *monc = &client->monc;
92         struct rb_node *rp;
93
94         mutex_lock(&monc->mutex);
95
96         if (monc->have_mdsmap)
97                 seq_printf(s, "have mdsmap %u\n", (unsigned)monc->have_mdsmap);
98         if (monc->have_osdmap)
99                 seq_printf(s, "have osdmap %u\n", (unsigned)monc->have_osdmap);
100         if (monc->want_next_osdmap)
101                 seq_printf(s, "want next osdmap\n");
102
103         for (rp = rb_first(&monc->generic_request_tree); rp; rp = rb_next(rp)) {
104                 __u16 op;
105                 req = rb_entry(rp, struct ceph_mon_generic_request, node);
106                 op = le16_to_cpu(req->request->hdr.type);
107                 if (op == CEPH_MSG_STATFS)
108                         seq_printf(s, "%lld statfs\n", req->tid);
109                 else
110                         seq_printf(s, "%lld unknown\n", req->tid);
111         }
112
113         mutex_unlock(&monc->mutex);
114         return 0;
115 }
116
117 static int osdc_show(struct seq_file *s, void *pp)
118 {
119         struct ceph_client *client = s->private;
120         struct ceph_osd_client *osdc = &client->osdc;
121         struct rb_node *p;
122
123         mutex_lock(&osdc->request_mutex);
124         for (p = rb_first(&osdc->requests); p; p = rb_next(p)) {
125                 struct ceph_osd_request *req;
126                 struct ceph_osd_request_head *head;
127                 struct ceph_osd_op *op;
128                 int num_ops;
129                 int opcode, olen;
130                 int i;
131
132                 req = rb_entry(p, struct ceph_osd_request, r_node);
133
134                 seq_printf(s, "%lld\tosd%d\t%d.%x\t", req->r_tid,
135                            req->r_osd ? req->r_osd->o_osd : -1,
136                            le32_to_cpu(req->r_pgid.pool),
137                            le16_to_cpu(req->r_pgid.ps));
138
139                 head = req->r_request->front.iov_base;
140                 op = (void *)(head + 1);
141
142                 num_ops = le16_to_cpu(head->num_ops);
143                 olen = le32_to_cpu(head->object_len);
144                 seq_printf(s, "%.*s", olen,
145                            (const char *)(head->ops + num_ops));
146
147                 if (req->r_reassert_version.epoch)
148                         seq_printf(s, "\t%u'%llu",
149                            (unsigned)le32_to_cpu(req->r_reassert_version.epoch),
150                            le64_to_cpu(req->r_reassert_version.version));
151                 else
152                         seq_printf(s, "\t");
153
154                 for (i = 0; i < num_ops; i++) {
155                         opcode = le16_to_cpu(op->op);
156                         seq_printf(s, "\t%s", ceph_osd_op_name(opcode));
157                         op++;
158                 }
159
160                 seq_printf(s, "\n");
161         }
162         mutex_unlock(&osdc->request_mutex);
163         return 0;
164 }
165
166 CEPH_DEFINE_SHOW_FUNC(monmap_show)
167 CEPH_DEFINE_SHOW_FUNC(osdmap_show)
168 CEPH_DEFINE_SHOW_FUNC(monc_show)
169 CEPH_DEFINE_SHOW_FUNC(osdc_show)
170
171 int ceph_debugfs_init(void)
172 {
173         ceph_debugfs_dir = debugfs_create_dir("ceph", NULL);
174         if (!ceph_debugfs_dir)
175                 return -ENOMEM;
176         return 0;
177 }
178
179 void ceph_debugfs_cleanup(void)
180 {
181         debugfs_remove(ceph_debugfs_dir);
182 }
183
184 int ceph_debugfs_client_init(struct ceph_client *client)
185 {
186         int ret = -ENOMEM;
187         char name[80];
188
189         snprintf(name, sizeof(name), "%pU.client%lld", &client->fsid,
190                  client->monc.auth->global_id);
191
192         client->debugfs_dir = debugfs_create_dir(name, ceph_debugfs_dir);
193         if (!client->debugfs_dir)
194                 goto out;
195
196         client->monc.debugfs_file = debugfs_create_file("monc",
197                                                       0600,
198                                                       client->debugfs_dir,
199                                                       client,
200                                                       &monc_show_fops);
201         if (!client->monc.debugfs_file)
202                 goto out;
203
204         client->osdc.debugfs_file = debugfs_create_file("osdc",
205                                                       0600,
206                                                       client->debugfs_dir,
207                                                       client,
208                                                       &osdc_show_fops);
209         if (!client->osdc.debugfs_file)
210                 goto out;
211
212         client->debugfs_monmap = debugfs_create_file("monmap",
213                                         0600,
214                                         client->debugfs_dir,
215                                         client,
216                                         &monmap_show_fops);
217         if (!client->debugfs_monmap)
218                 goto out;
219
220         client->debugfs_osdmap = debugfs_create_file("osdmap",
221                                         0600,
222                                         client->debugfs_dir,
223                                         client,
224                                         &osdmap_show_fops);
225         if (!client->debugfs_osdmap)
226                 goto out;
227
228         return 0;
229
230 out:
231         ceph_debugfs_client_cleanup(client);
232         return ret;
233 }
234
235 void ceph_debugfs_client_cleanup(struct ceph_client *client)
236 {
237         debugfs_remove(client->debugfs_osdmap);
238         debugfs_remove(client->debugfs_monmap);
239         debugfs_remove(client->osdc.debugfs_file);
240         debugfs_remove(client->monc.debugfs_file);
241         debugfs_remove(client->debugfs_dir);
242 }
243
244 #else  /* CONFIG_DEBUG_FS */
245
246 int ceph_debugfs_init(void)
247 {
248         return 0;
249 }
250
251 void ceph_debugfs_cleanup(void)
252 {
253 }
254
255 int ceph_debugfs_client_init(struct ceph_client *client)
256 {
257         return 0;
258 }
259
260 void ceph_debugfs_client_cleanup(struct ceph_client *client)
261 {
262 }
263
264 #endif  /* CONFIG_DEBUG_FS */
265
266 EXPORT_SYMBOL(ceph_debugfs_init);
267 EXPORT_SYMBOL(ceph_debugfs_cleanup);