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