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)
  64                         seq_printf(s, "%lld\tmds%d\t", req->r_tid, req->r_mds);
  65                 else
  66                         seq_printf(s, "%lld\t(no request)\t", req->r_tid);
  67
  68                 seq_printf(s, "%s", ceph_mds_op_name(req->r_op));
  69
  70                 if (req->r_got_unsafe)
  71                         seq_printf(s, "\t(unsafe)");
  72                 else
  73                         seq_printf(s, "\t");
  74
  75                 if (req->r_inode) {
  76                         seq_printf(s, " #%llx", ceph_ino(req->r_inode));
  77                 } else if (req->r_dentry) {
  78                         path = ceph_mdsc_build_path(req->r_dentry, &pathlen,
  79                                                     &pathbase, 0);
  80                         if (IS_ERR(path))
  81                                 path = NULL;
  82                         spin_lock(&req->r_dentry->d_lock);
  83                         seq_printf(s, " #%llx/%.*s (%s)",
  84                                    ceph_ino(req->r_dentry->d_parent->d_inode),
  85                                    req->r_dentry->d_name.len,
  86                                    req->r_dentry->d_name.name,
  87                                    path ? path : "");
  88                         spin_unlock(&req->r_dentry->d_lock);
  89                         kfree(path);
  90                 } else if (req->r_path1) {
  91                         seq_printf(s, " #%llx/%s", req->r_ino1.ino,
  92                                    req->r_path1);
  93                 }
  94
  95                 if (req->r_old_dentry) {
  96                         path = ceph_mdsc_build_path(req->r_old_dentry, &pathlen,
  97                                                     &pathbase, 0);
  98                         if (IS_ERR(path))
  99                                 path = NULL;
 100                         spin_lock(&req->r_old_dentry->d_lock);
 101                         seq_printf(s, " #%llx/%.*s (%s)",
 102                            ceph_ino(req->r_old_dentry->d_parent->d_inode),
 103                                    req->r_old_dentry->d_name.len,
 104                                    req->r_old_dentry->d_name.name,
 105                                    path ? path : "");
 106                         spin_unlock(&req->r_old_dentry->d_lock);
 107                         kfree(path);
 108                 } else if (req->r_path2) {
 109                         if (req->r_ino2.ino)
 110                                 seq_printf(s, " #%llx/%s", req->r_ino2.ino,
 111                                            req->r_path2);
 112                         else
 113                                 seq_printf(s, " %s", req->r_path2);
 114                 }
 115
 116                 seq_printf(s, "\n");
 117         }
 118         mutex_unlock(&mdsc->mutex);
 119
 120         return 0;
 121 }
 122
 123 static int caps_show(struct seq_file *s, void *p)
 124 {
 125         struct ceph_fs_client *fsc = s->private;
 126         int total, avail, used, reserved, min;
 127
 128         ceph_reservation_status(fsc, &total, &avail, &used, &reserved, &min);
 129         seq_printf(s, "total\t\t%d\n"
 130                    "avail\t\t%d\n"
 131                    "used\t\t%d\n"
 132                    "reserved\t%d\n"
 133                    "min\t%d\n",
 134                    total, avail, used, reserved, min);
 135         return 0;
 136 }
 137
 138 static int dentry_lru_show(struct seq_file *s, void *ptr)
 139 {
 140         struct ceph_fs_client *fsc = s->private;
 141         struct ceph_mds_client *mdsc = fsc->mdsc;
 142         struct ceph_dentry_info *di;
 143
 144         spin_lock(&mdsc->dentry_lru_lock);
 145         list_for_each_entry(di, &mdsc->dentry_lru, lru) {
 146                 struct dentry *dentry = di->dentry;
 147                 seq_printf(s, "%p %p\t%.*s\n",
 148                            di, dentry, dentry->d_name.len, dentry->d_name.name);
 149         }
 150         spin_unlock(&mdsc->dentry_lru_lock);
 151
 152         return 0;
 153 }
 154
 155 CEPH_DEFINE_SHOW_FUNC(mdsmap_show)
 156 CEPH_DEFINE_SHOW_FUNC(mdsc_show)
 157 CEPH_DEFINE_SHOW_FUNC(caps_show)
 158 CEPH_DEFINE_SHOW_FUNC(dentry_lru_show)
 159
 160
 161 /*
 162  * debugfs
 163  */
 164 static int congestion_kb_set(void *data, u64 val)
 165 {
 166         struct ceph_fs_client *fsc = (struct ceph_fs_client *)data;
 167
 168         fsc->mount_options->congestion_kb = (int)val;
 169         return 0;
 170 }
 171
 172 static int congestion_kb_get(void *data, u64 *val)
 173 {
 174         struct ceph_fs_client *fsc = (struct ceph_fs_client *)data;
 175
 176         *val = (u64)fsc->mount_options->congestion_kb;
 177         return 0;
 178 }
 179
 180 DEFINE_SIMPLE_ATTRIBUTE(congestion_kb_fops, congestion_kb_get,
 181                         congestion_kb_set, "%llu\n");
 182
 183
 184 void ceph_fs_debugfs_cleanup(struct ceph_fs_client *fsc)
 185 {
 186         dout("ceph_fs_debugfs_cleanup\n");
 187         debugfs_remove(fsc->debugfs_bdi);
 188         debugfs_remove(fsc->debugfs_congestion_kb);
 189         debugfs_remove(fsc->debugfs_mdsmap);
 190         debugfs_remove(fsc->debugfs_caps);
 191         debugfs_remove(fsc->debugfs_mdsc);
 192         debugfs_remove(fsc->debugfs_dentry_lru);
 193 }
 194
 195 int ceph_fs_debugfs_init(struct ceph_fs_client *fsc)
 196 {
 197         char name[100];
 198         int err = -ENOMEM;
 199
 200         dout("ceph_fs_debugfs_init\n");
 201         fsc->debugfs_congestion_kb =
 202                 debugfs_create_file("writeback_congestion_kb",
 203                                     0600,
 204                                     fsc->client->debugfs_dir,
 205                                     fsc,
 206                                     &congestion_kb_fops);
 207         if (!fsc->debugfs_congestion_kb)
 208                 goto out;
 209
 210         dout("a\n");
 211
 212         snprintf(name, sizeof(name), "../../bdi/%s",
 213                  dev_name(fsc->backing_dev_info.dev));
 214         fsc->debugfs_bdi =
 215                 debugfs_create_symlink("bdi",
 216                                        fsc->client->debugfs_dir,
 217                                        name);
 218         if (!fsc->debugfs_bdi)
 219                 goto out;
 220
 221         dout("b\n");
 222         fsc->debugfs_mdsmap = debugfs_create_file("mdsmap",
 223                                         0600,
 224                                         fsc->client->debugfs_dir,
 225                                         fsc,
 226                                         &mdsmap_show_fops);
 227         if (!fsc->debugfs_mdsmap)
 228                 goto out;
 229
 230         dout("ca\n");
 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         dout("da\n");
 240         fsc->debugfs_caps = debugfs_create_file("caps",
 241                                                    0400,
 242                                                    fsc->client->debugfs_dir,
 243                                                    fsc,
 244                                                    &caps_show_fops);
 245         if (!fsc->debugfs_caps)
 246                 goto out;
 247
 248         dout("ea\n");
 249         fsc->debugfs_dentry_lru = debugfs_create_file("dentry_lru",
 250                                         0600,
 251                                         fsc->client->debugfs_dir,
 252                                         fsc,
 253                                         &dentry_lru_show_fops);
 254         if (!fsc->debugfs_dentry_lru)
 255                 goto out;
 256
 257         return 0;
 258
 259 out:
 260         ceph_fs_debugfs_cleanup(fsc);
 261         return err;
 262 }
 263
 264
 265 #else  /* CONFIG_DEBUG_FS */
 266
 267 int ceph_fs_debugfs_init(struct ceph_fs_client *fsc)
 268 {
 269         return 0;
 270 }
 271
 272 void ceph_fs_debugfs_cleanup(struct ceph_fs_client *fsc)
 273 {
 274 }
 275
 276 #endif  /* CONFIG_DEBUG_FS */