fs/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 #include "super.h"
  16
  17 #ifdef CONFIG_DEBUG_FS
  18
  19 #include "mds_client.h"
  20
  21 static int mdsmap_show(struct seq_file *s, void *p)
  22 {
  23         int i;
  24         struct ceph_fs_client *fsc = s->private;
  25
  26         if (fsc->mdsc == NULL || fsc->mdsc->mdsmap == NULL)
  27                 return 0;
  28         seq_printf(s, "epoch %d\n", fsc->mdsc->mdsmap->m_epoch);
  29         seq_printf(s, "root %d\n", fsc->mdsc->mdsmap->m_root);
  30         seq_printf(s, "session_timeout %d\n",
  31                        fsc->mdsc->mdsmap->m_session_timeout);
  32         seq_printf(s, "session_autoclose %d\n",
  33                        fsc->mdsc->mdsmap->m_session_autoclose);
  34         for (i = 0; i < fsc->mdsc->mdsmap->m_max_mds; i++) {
  35                 struct ceph_entity_addr *addr =
  36                         &fsc->mdsc->mdsmap->m_info[i].addr;
  37                 int state = fsc->mdsc->mdsmap->m_info[i].state;
  38
  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  */
  49 static 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
 127 static 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
 142 static int dentry_lru_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_dentry_info *di;
 147
 148         spin_lock(&mdsc->dentry_lru_lock);
 149         list_for_each_entry(di, &mdsc->dentry_lru, lru) {
 150                 struct dentry *dentry = di->dentry;
 151                 seq_printf(s, "%p %p\t%pd\n",
 152                            di, dentry, dentry);
 153         }
 154         spin_unlock(&mdsc->dentry_lru_lock);
 155
 156         return 0;
 157 }
 158
 159 static int mds_sessions_show(struct seq_file *s, void *ptr)
 160 {
 161         struct ceph_fs_client *fsc = s->private;
 162         struct ceph_mds_client *mdsc = fsc->mdsc;
 163         struct ceph_auth_client *ac = fsc->client->monc.auth;
 164         struct ceph_options *opt = fsc->client->options;
 165         int mds = -1;
 166
 167         mutex_lock(&mdsc->mutex);
 168
 169         /* The 'num' portion of an 'entity name' */
 170         seq_printf(s, "global_id %llu\n", ac->global_id);
 171
 172         /* The -o name mount argument */
 173         seq_printf(s, "name \"%s\"\n", opt->name ? opt->name : "");
 174
 175         /* The list of MDS session rank+state */
 176         for (mds = 0; mds < mdsc->max_sessions; mds++) {
 177                 struct ceph_mds_session *session =
 178                         __ceph_lookup_mds_session(mdsc, mds);
 179                 if (!session) {
 180                         continue;
 181                 }
 182                 mutex_unlock(&mdsc->mutex);
 183                 seq_printf(s, "mds.%d %s\n",
 184                                 session->s_mds,
 185                                 ceph_session_state_name(session->s_state));
 186
 187                 ceph_put_mds_session(session);
 188                 mutex_lock(&mdsc->mutex);
 189         }
 190         mutex_unlock(&mdsc->mutex);
 191
 192         return 0;
 193 }
 194
 195 CEPH_DEFINE_SHOW_FUNC(mdsmap_show)
 196 CEPH_DEFINE_SHOW_FUNC(mdsc_show)
 197 CEPH_DEFINE_SHOW_FUNC(caps_show)
 198 CEPH_DEFINE_SHOW_FUNC(dentry_lru_show)
 199 CEPH_DEFINE_SHOW_FUNC(mds_sessions_show)
 200
 201
 202 /*
 203  * debugfs
 204  */
 205 static int congestion_kb_set(void *data, u64 val)
 206 {
 207         struct ceph_fs_client *fsc = (struct ceph_fs_client *)data;
 208
 209         fsc->mount_options->congestion_kb = (int)val;
 210         return 0;
 211 }
 212
 213 static int congestion_kb_get(void *data, u64 *val)
 214 {
 215         struct ceph_fs_client *fsc = (struct ceph_fs_client *)data;
 216
 217         *val = (u64)fsc->mount_options->congestion_kb;
 218         return 0;
 219 }
 220
 221 DEFINE_SIMPLE_ATTRIBUTE(congestion_kb_fops, congestion_kb_get,
 222                         congestion_kb_set, "%llu\n");
 223
 224
 225 void ceph_fs_debugfs_cleanup(struct ceph_fs_client *fsc)
 226 {
 227         dout("ceph_fs_debugfs_cleanup\n");
 228         debugfs_remove(fsc->debugfs_bdi);
 229         debugfs_remove(fsc->debugfs_congestion_kb);
 230         debugfs_remove(fsc->debugfs_mdsmap);
 231         debugfs_remove(fsc->debugfs_mds_sessions);
 232         debugfs_remove(fsc->debugfs_caps);
 233         debugfs_remove(fsc->debugfs_mdsc);
 234         debugfs_remove(fsc->debugfs_dentry_lru);
 235 }
 236
 237 int ceph_fs_debugfs_init(struct ceph_fs_client *fsc)
 238 {
 239         char name[100];
 240         int err = -ENOMEM;
 241
 242         dout("ceph_fs_debugfs_init\n");
 243         BUG_ON(!fsc->client->debugfs_dir);
 244         fsc->debugfs_congestion_kb =
 245                 debugfs_create_file("writeback_congestion_kb",
 246                                     0600,
 247                                     fsc->client->debugfs_dir,
 248                                     fsc,
 249                                     &congestion_kb_fops);
 250         if (!fsc->debugfs_congestion_kb)
 251                 goto out;
 252
 253         snprintf(name, sizeof(name), "../../bdi/%s",
 254                  dev_name(fsc->backing_dev_info.dev));
 255         fsc->debugfs_bdi =
 256                 debugfs_create_symlink("bdi",
 257                                        fsc->client->debugfs_dir,
 258                                        name);
 259         if (!fsc->debugfs_bdi)
 260                 goto out;
 261
 262         fsc->debugfs_mdsmap = debugfs_create_file("mdsmap",
 263                                         0600,
 264                                         fsc->client->debugfs_dir,
 265                                         fsc,
 266                                         &mdsmap_show_fops);
 267         if (!fsc->debugfs_mdsmap)
 268                 goto out;
 269
 270         fsc->debugfs_mds_sessions = debugfs_create_file("mds_sessions",
 271                                         0600,
 272                                         fsc->client->debugfs_dir,
 273                                         fsc,
 274                                         &mds_sessions_show_fops);
 275         if (!fsc->debugfs_mds_sessions)
 276                 goto out;
 277
 278         fsc->debugfs_mdsc = debugfs_create_file("mdsc",
 279                                                 0600,
 280                                                 fsc->client->debugfs_dir,
 281                                                 fsc,
 282                                                 &mdsc_show_fops);
 283         if (!fsc->debugfs_mdsc)
 284                 goto out;
 285
 286         fsc->debugfs_caps = debugfs_create_file("caps",
 287                                                    0400,
 288                                                    fsc->client->debugfs_dir,
 289                                                    fsc,
 290                                                    &caps_show_fops);
 291         if (!fsc->debugfs_caps)
 292                 goto out;
 293
 294         fsc->debugfs_dentry_lru = debugfs_create_file("dentry_lru",
 295                                         0600,
 296                                         fsc->client->debugfs_dir,
 297                                         fsc,
 298                                         &dentry_lru_show_fops);
 299         if (!fsc->debugfs_dentry_lru)
 300                 goto out;
 301
 302         return 0;
 303
 304 out:
 305         ceph_fs_debugfs_cleanup(fsc);
 306         return err;
 307 }
 308
 309
 310 #else  /* CONFIG_DEBUG_FS */
 311
 312 int ceph_fs_debugfs_init(struct ceph_fs_client *fsc)
 313 {
 314         return 0;
 315 }
 316
 317 void ceph_fs_debugfs_cleanup(struct ceph_fs_client *fsc)
 318 {
 319 }
 320
 321 #endif  /* CONFIG_DEBUG_FS */