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 (req->r_got_unsafe)
  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/%.*s (%s)",
  87                                    ceph_ino(req->r_dentry->d_parent->d_inode),
  88                                    req->r_dentry->d_name.len,
  89                                    req->r_dentry->d_name.name,
  90                                    path ? path : "");
  91                         spin_unlock(&req->r_dentry->d_lock);
  92                         kfree(path);
  93                 } else if (req->r_path1) {
  94                         seq_printf(s, " #%llx/%s", req->r_ino1.ino,
  95                                    req->r_path1);
  96                 } else {
  97                         seq_printf(s, " #%llx", req->r_ino1.ino);
  98                 }
  99
 100                 if (req->r_old_dentry) {
 101                         path = ceph_mdsc_build_path(req->r_old_dentry, &pathlen,
 102                                                     &pathbase, 0);
 103                         if (IS_ERR(path))
 104                                 path = NULL;
 105                         spin_lock(&req->r_old_dentry->d_lock);
 106                         seq_printf(s, " #%llx/%.*s (%s)",
 107                                    req->r_old_dentry_dir ?
 108                                    ceph_ino(req->r_old_dentry_dir) : 0,
 109                                    req->r_old_dentry->d_name.len,
 110                                    req->r_old_dentry->d_name.name,
 111                                    path ? path : "");
 112                         spin_unlock(&req->r_old_dentry->d_lock);
 113                         kfree(path);
 114                 } else if (req->r_path2) {
 115                         if (req->r_ino2.ino)
 116                                 seq_printf(s, " #%llx/%s", req->r_ino2.ino,
 117                                            req->r_path2);
 118                         else
 119                                 seq_printf(s, " %s", req->r_path2);
 120                 }
 121
 122                 seq_puts(s, "\n");
 123         }
 124         mutex_unlock(&mdsc->mutex);
 125
 126         return 0;
 127 }
 128
 129 static int caps_show(struct seq_file *s, void *p)
 130 {
 131         struct ceph_fs_client *fsc = s->private;
 132         int total, avail, used, reserved, min;
 133
 134         ceph_reservation_status(fsc, &total, &avail, &used, &reserved, &min);
 135         seq_printf(s, "total\t\t%d\n"
 136                    "avail\t\t%d\n"
 137                    "used\t\t%d\n"
 138                    "reserved\t%d\n"
 139                    "min\t%d\n",
 140                    total, avail, used, reserved, min);
 141         return 0;
 142 }
 143
 144 static int dentry_lru_show(struct seq_file *s, void *ptr)
 145 {
 146         struct ceph_fs_client *fsc = s->private;
 147         struct ceph_mds_client *mdsc = fsc->mdsc;
 148         struct ceph_dentry_info *di;
 149
 150         spin_lock(&mdsc->dentry_lru_lock);
 151         list_for_each_entry(di, &mdsc->dentry_lru, lru) {
 152                 struct dentry *dentry = di->dentry;
 153                 seq_printf(s, "%p %p\t%.*s\n",
 154                            di, dentry, dentry->d_name.len, dentry->d_name.name);
 155         }
 156         spin_unlock(&mdsc->dentry_lru_lock);
 157
 158         return 0;
 159 }
 160
 161 static int mds_sessions_show(struct seq_file *s, void *ptr)
 162 {
 163         struct ceph_fs_client *fsc = s->private;
 164         struct ceph_mds_client *mdsc = fsc->mdsc;
 165         struct ceph_auth_client *ac = fsc->client->monc.auth;
 166         struct ceph_options *opt = fsc->client->options;
 167         int mds = -1;
 168
 169         mutex_lock(&mdsc->mutex);
 170
 171         /* The 'num' portion of an 'entity name' */
 172         seq_printf(s, "global_id %llu\n", ac->global_id);
 173
 174         /* The -o name mount argument */
 175         seq_printf(s, "name \"%s\"\n", opt->name ? opt->name : "");
 176
 177         /* The list of MDS session rank+state */
 178         for (mds = 0; mds < mdsc->max_sessions; mds++) {
 179                 struct ceph_mds_session *session =
 180                         __ceph_lookup_mds_session(mdsc, mds);
 181                 if (!session) {
 182                         continue;
 183                 }
 184                 mutex_unlock(&mdsc->mutex);
 185                 seq_printf(s, "mds.%d %s\n",
 186                                 session->s_mds,
 187                                 ceph_session_state_name(session->s_state));
 188
 189                 ceph_put_mds_session(session);
 190                 mutex_lock(&mdsc->mutex);
 191         }
 192         mutex_unlock(&mdsc->mutex);
 193
 194         return 0;
 195 }
 196
 197 CEPH_DEFINE_SHOW_FUNC(mdsmap_show)
 198 CEPH_DEFINE_SHOW_FUNC(mdsc_show)
 199 CEPH_DEFINE_SHOW_FUNC(caps_show)
 200 CEPH_DEFINE_SHOW_FUNC(dentry_lru_show)
 201 CEPH_DEFINE_SHOW_FUNC(mds_sessions_show)
 202
 203
 204 /*
 205  * debugfs
 206  */
 207 static int congestion_kb_set(void *data, u64 val)
 208 {
 209         struct ceph_fs_client *fsc = (struct ceph_fs_client *)data;
 210
 211         fsc->mount_options->congestion_kb = (int)val;
 212         return 0;
 213 }
 214
 215 static int congestion_kb_get(void *data, u64 *val)
 216 {
 217         struct ceph_fs_client *fsc = (struct ceph_fs_client *)data;
 218
 219         *val = (u64)fsc->mount_options->congestion_kb;
 220         return 0;
 221 }
 222
 223 DEFINE_SIMPLE_ATTRIBUTE(congestion_kb_fops, congestion_kb_get,
 224                         congestion_kb_set, "%llu\n");
 225
 226
 227 void ceph_fs_debugfs_cleanup(struct ceph_fs_client *fsc)
 228 {
 229         dout("ceph_fs_debugfs_cleanup\n");
 230         debugfs_remove(fsc->debugfs_bdi);
 231         debugfs_remove(fsc->debugfs_congestion_kb);
 232         debugfs_remove(fsc->debugfs_mdsmap);
 233         debugfs_remove(fsc->debugfs_mds_sessions);
 234         debugfs_remove(fsc->debugfs_caps);
 235         debugfs_remove(fsc->debugfs_mdsc);
 236         debugfs_remove(fsc->debugfs_dentry_lru);
 237 }
 238
 239 int ceph_fs_debugfs_init(struct ceph_fs_client *fsc)
 240 {
 241         char name[100];
 242         int err = -ENOMEM;
 243
 244         dout("ceph_fs_debugfs_init\n");
 245         BUG_ON(!fsc->client->debugfs_dir);
 246         fsc->debugfs_congestion_kb =
 247                 debugfs_create_file("writeback_congestion_kb",
 248                                     0600,
 249                                     fsc->client->debugfs_dir,
 250                                     fsc,
 251                                     &congestion_kb_fops);
 252         if (!fsc->debugfs_congestion_kb)
 253                 goto out;
 254
 255         snprintf(name, sizeof(name), "../../bdi/%s",
 256                  dev_name(fsc->backing_dev_info.dev));
 257         fsc->debugfs_bdi =
 258                 debugfs_create_symlink("bdi",
 259                                        fsc->client->debugfs_dir,
 260                                        name);
 261         if (!fsc->debugfs_bdi)
 262                 goto out;
 263
 264         fsc->debugfs_mdsmap = debugfs_create_file("mdsmap",
 265                                         0600,
 266                                         fsc->client->debugfs_dir,
 267                                         fsc,
 268                                         &mdsmap_show_fops);
 269         if (!fsc->debugfs_mdsmap)
 270                 goto out;
 271
 272         fsc->debugfs_mds_sessions = debugfs_create_file("mds_sessions",
 273                                         0600,
 274                                         fsc->client->debugfs_dir,
 275                                         fsc,
 276                                         &mds_sessions_show_fops);
 277         if (!fsc->debugfs_mds_sessions)
 278                 goto out;
 279
 280         fsc->debugfs_mdsc = debugfs_create_file("mdsc",
 281                                                 0600,
 282                                                 fsc->client->debugfs_dir,
 283                                                 fsc,
 284                                                 &mdsc_show_fops);
 285         if (!fsc->debugfs_mdsc)
 286                 goto out;
 287
 288         fsc->debugfs_caps = debugfs_create_file("caps",
 289                                                    0400,
 290                                                    fsc->client->debugfs_dir,
 291                                                    fsc,
 292                                                    &caps_show_fops);
 293         if (!fsc->debugfs_caps)
 294                 goto out;
 295
 296         fsc->debugfs_dentry_lru = debugfs_create_file("dentry_lru",
 297                                         0600,
 298                                         fsc->client->debugfs_dir,
 299                                         fsc,
 300                                         &dentry_lru_show_fops);
 301         if (!fsc->debugfs_dentry_lru)
 302                 goto out;
 303
 304         return 0;
 305
 306 out:
 307         ceph_fs_debugfs_cleanup(fsc);
 308         return err;
 309 }
 310
 311
 312 #else  /* CONFIG_DEBUG_FS */
 313
 314 int ceph_fs_debugfs_init(struct ceph_fs_client *fsc)
 315 {
 316         return 0;
 317 }
 318
 319 void ceph_fs_debugfs_cleanup(struct ceph_fs_client *fsc)
 320 {
 321 }
 322
 323 #endif  /* CONFIG_DEBUG_FS */