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         struct ceph_mdsmap *mdsmap;
  26
  27         if (fsc->mdsc == NULL || fsc->mdsc->mdsmap == NULL)
  28                 return 0;
  29         mdsmap = fsc->mdsc->mdsmap;
  30         seq_printf(s, "epoch %d\n", mdsmap->m_epoch);
  31         seq_printf(s, "root %d\n", mdsmap->m_root);
  32         seq_printf(s, "max_mds %d\n", mdsmap->m_max_mds);
  33         seq_printf(s, "session_timeout %d\n", mdsmap->m_session_timeout);
  34         seq_printf(s, "session_autoclose %d\n", mdsmap->m_session_autoclose);
  35         for (i = 0; i < mdsmap->m_num_mds; i++) {
  36                 struct ceph_entity_addr *addr = &mdsmap->m_info[i].addr;
  37                 int state = mdsmap->m_info[i].state;
  38                 seq_printf(s, "\tmds%d\t%s\t(%s)\n", i,
  39                                ceph_pr_addr(&addr->in_addr),
  40                                ceph_mds_state_name(state));
  41         }
  42         return 0;
  43 }
  44
  45 /*
  46  * mdsc debugfs
  47  */
  48 static int mdsc_show(struct seq_file *s, void *p)
  49 {
  50         struct ceph_fs_client *fsc = s->private;
  51         struct ceph_mds_client *mdsc = fsc->mdsc;
  52         struct ceph_mds_request *req;
  53         struct rb_node *rp;
  54         int pathlen;
  55         u64 pathbase;
  56         char *path;
  57
  58         mutex_lock(&mdsc->mutex);
  59         for (rp = rb_first(&mdsc->request_tree); rp; rp = rb_next(rp)) {
  60                 req = rb_entry(rp, struct ceph_mds_request, r_node);
  61
  62                 if (req->r_request && req->r_session)
  63                         seq_printf(s, "%lld\tmds%d\t", req->r_tid,
  64                                    req->r_session->s_mds);
  65                 else if (!req->r_request)
  66                         seq_printf(s, "%lld\t(no request)\t", req->r_tid);
  67                 else
  68                         seq_printf(s, "%lld\t(no session)\t", req->r_tid);
  69
  70                 seq_printf(s, "%s", ceph_mds_op_name(req->r_op));
  71
  72                 if (test_bit(CEPH_MDS_R_GOT_UNSAFE, &req->r_req_flags))
  73                         seq_puts(s, "\t(unsafe)");
  74                 else
  75                         seq_puts(s, "\t");
  76
  77                 if (req->r_inode) {
  78                         seq_printf(s, " #%llx", ceph_ino(req->r_inode));
  79                 } else if (req->r_dentry) {
  80                         path = ceph_mdsc_build_path(req->r_dentry, &pathlen,
  81                                                     &pathbase, 0);
  82                         if (IS_ERR(path))
  83                                 path = NULL;
  84                         spin_lock(&req->r_dentry->d_lock);
  85                         seq_printf(s, " #%llx/%pd (%s)",
  86                                    ceph_ino(d_inode(req->r_dentry->d_parent)),
  87                                    req->r_dentry,
  88                                    path ? path : "");
  89                         spin_unlock(&req->r_dentry->d_lock);
  90                         kfree(path);
  91                 } else if (req->r_path1) {
  92                         seq_printf(s, " #%llx/%s", req->r_ino1.ino,
  93                                    req->r_path1);
  94                 } else {
  95                         seq_printf(s, " #%llx", req->r_ino1.ino);
  96                 }
  97
  98                 if (req->r_old_dentry) {
  99                         path = ceph_mdsc_build_path(req->r_old_dentry, &pathlen,
 100                                                     &pathbase, 0);
 101                         if (IS_ERR(path))
 102                                 path = NULL;
 103                         spin_lock(&req->r_old_dentry->d_lock);
 104                         seq_printf(s, " #%llx/%pd (%s)",
 105                                    req->r_old_dentry_dir ?
 106                                    ceph_ino(req->r_old_dentry_dir) : 0,
 107                                    req->r_old_dentry,
 108                                    path ? path : "");
 109                         spin_unlock(&req->r_old_dentry->d_lock);
 110                         kfree(path);
 111                 } else if (req->r_path2 && req->r_op != CEPH_MDS_OP_SYMLINK) {
 112                         if (req->r_ino2.ino)
 113                                 seq_printf(s, " #%llx/%s", req->r_ino2.ino,
 114                                            req->r_path2);
 115                         else
 116                                 seq_printf(s, " %s", req->r_path2);
 117                 }
 118
 119                 seq_puts(s, "\n");
 120         }
 121         mutex_unlock(&mdsc->mutex);
 122
 123         return 0;
 124 }
 125
 126 static int caps_show(struct seq_file *s, void *p)
 127 {
 128         struct ceph_fs_client *fsc = s->private;
 129         int total, avail, used, reserved, min;
 130
 131         ceph_reservation_status(fsc, &total, &avail, &used, &reserved, &min);
 132         seq_printf(s, "total\t\t%d\n"
 133                    "avail\t\t%d\n"
 134                    "used\t\t%d\n"
 135                    "reserved\t%d\n"
 136                    "min\t%d\n",
 137                    total, avail, used, reserved, min);
 138         return 0;
 139 }
 140
 141 static int dentry_lru_show(struct seq_file *s, void *ptr)
 142 {
 143         struct ceph_fs_client *fsc = s->private;
 144         struct ceph_mds_client *mdsc = fsc->mdsc;
 145         struct ceph_dentry_info *di;
 146
 147         spin_lock(&mdsc->dentry_lru_lock);
 148         list_for_each_entry(di, &mdsc->dentry_lru, lru) {
 149                 struct dentry *dentry = di->dentry;
 150                 seq_printf(s, "%p %p\t%pd\n",
 151                            di, dentry, dentry);
 152         }
 153         spin_unlock(&mdsc->dentry_lru_lock);
 154
 155         return 0;
 156 }
 157
 158 static int mds_sessions_show(struct seq_file *s, void *ptr)
 159 {
 160         struct ceph_fs_client *fsc = s->private;
 161         struct ceph_mds_client *mdsc = fsc->mdsc;
 162         struct ceph_auth_client *ac = fsc->client->monc.auth;
 163         struct ceph_options *opt = fsc->client->options;
 164         int mds = -1;
 165
 166         mutex_lock(&mdsc->mutex);
 167
 168         /* The 'num' portion of an 'entity name' */
 169         seq_printf(s, "global_id %llu\n", ac->global_id);
 170
 171         /* The -o name mount argument */
 172         seq_printf(s, "name \"%s\"\n", opt->name ? opt->name : "");
 173
 174         /* The list of MDS session rank+state */
 175         for (mds = 0; mds < mdsc->max_sessions; mds++) {
 176                 struct ceph_mds_session *session =
 177                         __ceph_lookup_mds_session(mdsc, mds);
 178                 if (!session) {
 179                         continue;
 180                 }
 181                 mutex_unlock(&mdsc->mutex);
 182                 seq_printf(s, "mds.%d %s\n",
 183                                 session->s_mds,
 184                                 ceph_session_state_name(session->s_state));
 185
 186                 ceph_put_mds_session(session);
 187                 mutex_lock(&mdsc->mutex);
 188         }
 189         mutex_unlock(&mdsc->mutex);
 190
 191         return 0;
 192 }
 193
 194 CEPH_DEFINE_SHOW_FUNC(mdsmap_show)
 195 CEPH_DEFINE_SHOW_FUNC(mdsc_show)
 196 CEPH_DEFINE_SHOW_FUNC(caps_show)
 197 CEPH_DEFINE_SHOW_FUNC(dentry_lru_show)
 198 CEPH_DEFINE_SHOW_FUNC(mds_sessions_show)
 199
 200
 201 /*
 202  * debugfs
 203  */
 204 static int congestion_kb_set(void *data, u64 val)
 205 {
 206         struct ceph_fs_client *fsc = (struct ceph_fs_client *)data;
 207
 208         fsc->mount_options->congestion_kb = (int)val;
 209         return 0;
 210 }
 211
 212 static int congestion_kb_get(void *data, u64 *val)
 213 {
 214         struct ceph_fs_client *fsc = (struct ceph_fs_client *)data;
 215
 216         *val = (u64)fsc->mount_options->congestion_kb;
 217         return 0;
 218 }
 219
 220 DEFINE_SIMPLE_ATTRIBUTE(congestion_kb_fops, congestion_kb_get,
 221                         congestion_kb_set, "%llu\n");
 222
 223
 224 void ceph_fs_debugfs_cleanup(struct ceph_fs_client *fsc)
 225 {
 226         dout("ceph_fs_debugfs_cleanup\n");
 227         debugfs_remove(fsc->debugfs_bdi);
 228         debugfs_remove(fsc->debugfs_congestion_kb);
 229         debugfs_remove(fsc->debugfs_mdsmap);
 230         debugfs_remove(fsc->debugfs_mds_sessions);
 231         debugfs_remove(fsc->debugfs_caps);
 232         debugfs_remove(fsc->debugfs_mdsc);
 233         debugfs_remove(fsc->debugfs_dentry_lru);
 234 }
 235
 236 int ceph_fs_debugfs_init(struct ceph_fs_client *fsc)
 237 {
 238         char name[100];
 239         int err = -ENOMEM;
 240
 241         dout("ceph_fs_debugfs_init\n");
 242         BUG_ON(!fsc->client->debugfs_dir);
 243         fsc->debugfs_congestion_kb =
 244                 debugfs_create_file("writeback_congestion_kb",
 245                                     0600,
 246                                     fsc->client->debugfs_dir,
 247                                     fsc,
 248                                     &congestion_kb_fops);
 249         if (!fsc->debugfs_congestion_kb)
 250                 goto out;
 251
 252         snprintf(name, sizeof(name), "../../bdi/%s",
 253                  dev_name(fsc->sb->s_bdi->dev));
 254         fsc->debugfs_bdi =
 255                 debugfs_create_symlink("bdi",
 256                                        fsc->client->debugfs_dir,
 257                                        name);
 258         if (!fsc->debugfs_bdi)
 259                 goto out;
 260
 261         fsc->debugfs_mdsmap = debugfs_create_file("mdsmap",
 262                                         0600,
 263                                         fsc->client->debugfs_dir,
 264                                         fsc,
 265                                         &mdsmap_show_fops);
 266         if (!fsc->debugfs_mdsmap)
 267                 goto out;
 268
 269         fsc->debugfs_mds_sessions = debugfs_create_file("mds_sessions",
 270                                         0600,
 271                                         fsc->client->debugfs_dir,
 272                                         fsc,
 273                                         &mds_sessions_show_fops);
 274         if (!fsc->debugfs_mds_sessions)
 275                 goto out;
 276
 277         fsc->debugfs_mdsc = debugfs_create_file("mdsc",
 278                                                 0600,
 279                                                 fsc->client->debugfs_dir,
 280                                                 fsc,
 281                                                 &mdsc_show_fops);
 282         if (!fsc->debugfs_mdsc)
 283                 goto out;
 284
 285         fsc->debugfs_caps = debugfs_create_file("caps",
 286                                                    0400,
 287                                                    fsc->client->debugfs_dir,
 288                                                    fsc,
 289                                                    &caps_show_fops);
 290         if (!fsc->debugfs_caps)
 291                 goto out;
 292
 293         fsc->debugfs_dentry_lru = debugfs_create_file("dentry_lru",
 294                                         0600,
 295                                         fsc->client->debugfs_dir,
 296                                         fsc,
 297                                         &dentry_lru_show_fops);
 298         if (!fsc->debugfs_dentry_lru)
 299                 goto out;
 300
 301         return 0;
 302
 303 out:
 304         ceph_fs_debugfs_cleanup(fsc);
 305         return err;
 306 }
 307
 308
 309 #else  /* CONFIG_DEBUG_FS */
 310
 311 int ceph_fs_debugfs_init(struct ceph_fs_client *fsc)
 312 {
 313         return 0;
 314 }
 315
 316 void ceph_fs_debugfs_cleanup(struct ceph_fs_client *fsc)
 317 {
 318 }
 319
 320 #endif  /* CONFIG_DEBUG_FS */