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 ceph_osdmap *map = client->osdc.osdmap;
  57         struct rb_node *n;
  58
  59         if (map == NULL)
  60                 return 0;
  61
  62         seq_printf(s, "epoch %d\n", map->epoch);
  63         seq_printf(s, "flags%s%s\n",
  64                    (map->flags & CEPH_OSDMAP_NEARFULL) ?  " NEARFULL" : "",
  65                    (map->flags & CEPH_OSDMAP_FULL) ?  " FULL" : "");
  66
  67         for (n = rb_first(&map->pg_pools); n; n = rb_next(n)) {
  68                 struct ceph_pg_pool_info *pool =
  69                         rb_entry(n, struct ceph_pg_pool_info, node);
  70
  71                 seq_printf(s, "pg_pool %llu pg_num %d / %d\n",
  72                            (unsigned long long)pool->id, pool->pg_num,
  73                            pool->pg_num_mask);
  74         }
  75         for (i = 0; i < map->max_osd; i++) {
  76                 struct ceph_entity_addr *addr = &map->osd_addr[i];
  77                 int state = map->osd_state[i];
  78                 char sb[64];
  79
  80                 seq_printf(s, "osd%d\t%s\t%3d%%\t(%s)\n",
  81                            i, ceph_pr_addr(&addr->in_addr),
  82                            ((map->osd_weight[i]*100) >> 16),
  83                            ceph_osdmap_state_str(sb, sizeof(sb), state));
  84         }
  85         for (n = rb_first(&map->pg_temp); n; n = rb_next(n)) {
  86                 struct ceph_pg_mapping *pg =
  87                         rb_entry(n, struct ceph_pg_mapping, node);
  88
  89                 seq_printf(s, "pg_temp %llu.%x [", pg->pgid.pool,
  90                            pg->pgid.seed);
  91                 for (i = 0; i < pg->pg_temp.len; i++)
  92                         seq_printf(s, "%s%d", (i == 0 ? "" : ","),
  93                                    pg->pg_temp.osds[i]);
  94                 seq_printf(s, "]\n");
  95         }
  96
  97         return 0;
  98 }
  99
 100 static int monc_show(struct seq_file *s, void *p)
 101 {
 102         struct ceph_client *client = s->private;
 103         struct ceph_mon_generic_request *req;
 104         struct ceph_mon_client *monc = &client->monc;
 105         struct rb_node *rp;
 106
 107         mutex_lock(&monc->mutex);
 108
 109         if (monc->have_mdsmap)
 110                 seq_printf(s, "have mdsmap %u\n", (unsigned int)monc->have_mdsmap);
 111         if (monc->have_osdmap)
 112                 seq_printf(s, "have osdmap %u\n", (unsigned int)monc->have_osdmap);
 113         if (monc->want_next_osdmap)
 114                 seq_printf(s, "want next osdmap\n");
 115
 116         for (rp = rb_first(&monc->generic_request_tree); rp; rp = rb_next(rp)) {
 117                 __u16 op;
 118                 req = rb_entry(rp, struct ceph_mon_generic_request, node);
 119                 op = le16_to_cpu(req->request->hdr.type);
 120                 if (op == CEPH_MSG_STATFS)
 121                         seq_printf(s, "%lld statfs\n", req->tid);
 122                 else
 123                         seq_printf(s, "%lld unknown\n", req->tid);
 124         }
 125
 126         mutex_unlock(&monc->mutex);
 127         return 0;
 128 }
 129
 130 static int osdc_show(struct seq_file *s, void *pp)
 131 {
 132         struct ceph_client *client = s->private;
 133         struct ceph_osd_client *osdc = &client->osdc;
 134         struct rb_node *p;
 135
 136         mutex_lock(&osdc->request_mutex);
 137         for (p = rb_first(&osdc->requests); p; p = rb_next(p)) {
 138                 struct ceph_osd_request *req;
 139                 unsigned int i;
 140                 int opcode;
 141
 142                 req = rb_entry(p, struct ceph_osd_request, r_node);
 143
 144                 seq_printf(s, "%lld\tosd%d\t%lld.%x\t", req->r_tid,
 145                            req->r_osd ? req->r_osd->o_osd : -1,
 146                            req->r_pgid.pool, req->r_pgid.seed);
 147
 148                 seq_printf(s, "%.*s", req->r_base_oid.name_len,
 149                            req->r_base_oid.name);
 150
 151                 if (req->r_reassert_version.epoch)
 152                         seq_printf(s, "\t%u'%llu",
 153                            (unsigned int)le32_to_cpu(req->r_reassert_version.epoch),
 154                            le64_to_cpu(req->r_reassert_version.version));
 155                 else
 156                         seq_printf(s, "\t");
 157
 158                 for (i = 0; i < req->r_num_ops; i++) {
 159                         opcode = req->r_ops[i].op;
 160                         seq_printf(s, "\t%s", ceph_osd_op_name(opcode));
 161                 }
 162
 163                 seq_printf(s, "\n");
 164         }
 165         mutex_unlock(&osdc->request_mutex);
 166         return 0;
 167 }
 168
 169 CEPH_DEFINE_SHOW_FUNC(monmap_show)
 170 CEPH_DEFINE_SHOW_FUNC(osdmap_show)
 171 CEPH_DEFINE_SHOW_FUNC(monc_show)
 172 CEPH_DEFINE_SHOW_FUNC(osdc_show)
 173
 174 int ceph_debugfs_init(void)
 175 {
 176         ceph_debugfs_dir = debugfs_create_dir("ceph", NULL);
 177         if (!ceph_debugfs_dir)
 178                 return -ENOMEM;
 179         return 0;
 180 }
 181
 182 void ceph_debugfs_cleanup(void)
 183 {
 184         debugfs_remove(ceph_debugfs_dir);
 185 }
 186
 187 int ceph_debugfs_client_init(struct ceph_client *client)
 188 {
 189         int ret = -ENOMEM;
 190         char name[80];
 191
 192         snprintf(name, sizeof(name), "%pU.client%lld", &client->fsid,
 193                  client->monc.auth->global_id);
 194
 195         dout("ceph_debugfs_client_init %p %s\n", client, name);
 196
 197         BUG_ON(client->debugfs_dir);
 198         client->debugfs_dir = debugfs_create_dir(name, ceph_debugfs_dir);
 199         if (!client->debugfs_dir)
 200                 goto out;
 201
 202         client->monc.debugfs_file = debugfs_create_file("monc",
 203                                                       0600,
 204                                                       client->debugfs_dir,
 205                                                       client,
 206                                                       &monc_show_fops);
 207         if (!client->monc.debugfs_file)
 208                 goto out;
 209
 210         client->osdc.debugfs_file = debugfs_create_file("osdc",
 211                                                       0600,
 212                                                       client->debugfs_dir,
 213                                                       client,
 214                                                       &osdc_show_fops);
 215         if (!client->osdc.debugfs_file)
 216                 goto out;
 217
 218         client->debugfs_monmap = debugfs_create_file("monmap",
 219                                         0600,
 220                                         client->debugfs_dir,
 221                                         client,
 222                                         &monmap_show_fops);
 223         if (!client->debugfs_monmap)
 224                 goto out;
 225
 226         client->debugfs_osdmap = debugfs_create_file("osdmap",
 227                                         0600,
 228                                         client->debugfs_dir,
 229                                         client,
 230                                         &osdmap_show_fops);
 231         if (!client->debugfs_osdmap)
 232                 goto out;
 233
 234         return 0;
 235
 236 out:
 237         ceph_debugfs_client_cleanup(client);
 238         return ret;
 239 }
 240
 241 void ceph_debugfs_client_cleanup(struct ceph_client *client)
 242 {
 243         dout("ceph_debugfs_client_cleanup %p\n", client);
 244         debugfs_remove(client->debugfs_osdmap);
 245         debugfs_remove(client->debugfs_monmap);
 246         debugfs_remove(client->osdc.debugfs_file);
 247         debugfs_remove(client->monc.debugfs_file);
 248         debugfs_remove(client->debugfs_dir);
 249 }
 250
 251 #else  /* CONFIG_DEBUG_FS */
 252
 253 int ceph_debugfs_init(void)
 254 {
 255         return 0;
 256 }
 257
 258 void ceph_debugfs_cleanup(void)
 259 {
 260 }
 261
 262 int ceph_debugfs_client_init(struct ceph_client *client)
 263 {
 264         return 0;
 265 }
 266
 267 void ceph_debugfs_client_cleanup(struct ceph_client *client)
 268 {
 269 }
 270
 271 #endif  /* CONFIG_DEBUG_FS */
 272
 273 EXPORT_SYMBOL(ceph_debugfs_init);
 274 EXPORT_SYMBOL(ceph_debugfs_cleanup);