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);