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_printf(s, "\t(unsafe)");
  75                 else
  76                         seq_printf(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                 }
  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/%.*s (%s)",
 105                            ceph_ino(req->r_old_dentry_dir),
 106                                    req->r_old_dentry->d_name.len,
 107                                    req->r_old_dentry->d_name.name,
 108                                    path ? path : "");
 109                         spin_unlock(&req->r_old_dentry->d_lock);
 110                         kfree(path);
 111                 } else if (req->r_path2) {
 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_printf(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%.*s\n",
 151                            di, dentry, dentry->d_name.len, dentry->d_name.name);
 152         }
 153         spin_unlock(&mdsc->dentry_lru_lock);
 154
 155         return 0;
 156 }
 157
 158 CEPH_DEFINE_SHOW_FUNC(mdsmap_show)
 159 CEPH_DEFINE_SHOW_FUNC(mdsc_show)
 160 CEPH_DEFINE_SHOW_FUNC(caps_show)
 161 CEPH_DEFINE_SHOW_FUNC(dentry_lru_show)
 162
 163
 164 /*
 165  * debugfs
 166  */
 167 static int congestion_kb_set(void *data, u64 val)
 168 {
 169         struct ceph_fs_client *fsc = (struct ceph_fs_client *)data;
 170
 171         fsc->mount_options->congestion_kb = (int)val;
 172         return 0;
 173 }
 174
 175 static int congestion_kb_get(void *data, u64 *val)
 176 {
 177         struct ceph_fs_client *fsc = (struct ceph_fs_client *)data;
 178
 179         *val = (u64)fsc->mount_options->congestion_kb;
 180         return 0;
 181 }
 182
 183 DEFINE_SIMPLE_ATTRIBUTE(congestion_kb_fops, congestion_kb_get,
 184                         congestion_kb_set, "%llu\n");
 185
 186
 187 void ceph_fs_debugfs_cleanup(struct ceph_fs_client *fsc)
 188 {
 189         dout("ceph_fs_debugfs_cleanup\n");
 190         debugfs_remove(fsc->debugfs_bdi);
 191         debugfs_remove(fsc->debugfs_congestion_kb);
 192         debugfs_remove(fsc->debugfs_mdsmap);
 193         debugfs_remove(fsc->debugfs_caps);
 194         debugfs_remove(fsc->debugfs_mdsc);
 195         debugfs_remove(fsc->debugfs_dentry_lru);
 196 }
 197
 198 int ceph_fs_debugfs_init(struct ceph_fs_client *fsc)
 199 {
 200         char name[100];
 201         int err = -ENOMEM;
 202
 203         dout("ceph_fs_debugfs_init\n");
 204         BUG_ON(!fsc->client->debugfs_dir);
 205         fsc->debugfs_congestion_kb =
 206                 debugfs_create_file("writeback_congestion_kb",
 207                                     0600,
 208                                     fsc->client->debugfs_dir,
 209                                     fsc,
 210                                     &congestion_kb_fops);
 211         if (!fsc->debugfs_congestion_kb)
 212                 goto out;
 213
 214         snprintf(name, sizeof(name), "../../bdi/%s",
 215                  dev_name(fsc->backing_dev_info.dev));
 216         fsc->debugfs_bdi =
 217                 debugfs_create_symlink("bdi",
 218                                        fsc->client->debugfs_dir,
 219                                        name);
 220         if (!fsc->debugfs_bdi)
 221                 goto out;
 222
 223         fsc->debugfs_mdsmap = debugfs_create_file("mdsmap",
 224                                         0600,
 225                                         fsc->client->debugfs_dir,
 226                                         fsc,
 227                                         &mdsmap_show_fops);
 228         if (!fsc->debugfs_mdsmap)
 229                 goto out;
 230
 231         fsc->debugfs_mdsc = debugfs_create_file("mdsc",
 232                                                 0600,
 233                                                 fsc->client->debugfs_dir,
 234                                                 fsc,
 235                                                 &mdsc_show_fops);
 236         if (!fsc->debugfs_mdsc)
 237                 goto out;
 238
 239         fsc->debugfs_caps = debugfs_create_file("caps",
 240                                                    0400,
 241                                                    fsc->client->debugfs_dir,
 242                                                    fsc,
 243                                                    &caps_show_fops);
 244         if (!fsc->debugfs_caps)
 245                 goto out;
 246
 247         fsc->debugfs_dentry_lru = debugfs_create_file("dentry_lru",
 248                                         0600,
 249                                         fsc->client->debugfs_dir,
 250                                         fsc,
 251                                         &dentry_lru_show_fops);
 252         if (!fsc->debugfs_dentry_lru)
 253                 goto out;
 254
 255         return 0;
 256
 257 out:
 258         ceph_fs_debugfs_cleanup(fsc);
 259         return err;
 260 }
 261
 262
 263 #else  /* CONFIG_DEBUG_FS */
 264
 265 int ceph_fs_debugfs_init(struct ceph_fs_client *fsc)
 266 {
 267         return 0;
 268 }
 269
 270 void ceph_fs_debugfs_cleanup(struct ceph_fs_client *fsc)
 271 {
 272 }
 273
 274 #endif  /* CONFIG_DEBUG_FS */