fs/ceph/debugfs.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 #include <linux/ceph/ceph_debug.h>
   3
   4 #include <linux/device.h>
   5 #include <linux/slab.h>
   6 #include <linux/module.h>
   7 #include <linux/ctype.h>
   8 #include <linux/debugfs.h>
   9 #include <linux/seq_file.h>
  10
  11 #include <linux/ceph/libceph.h>
  12 #include <linux/ceph/mon_client.h>
  13 #include <linux/ceph/auth.h>
  14 #include <linux/ceph/debugfs.h>
  15
  16 #include "super.h"
  17
  18 #ifdef CONFIG_DEBUG_FS
  19
  20 #include "mds_client.h"
  21
  22 static int mdsmap_show(struct seq_file *s, void *p)
  23 {
  24         int i;
  25         struct ceph_fs_client *fsc = s->private;
  26         struct ceph_mdsmap *mdsmap;
  27
  28         if (!fsc->mdsc || !fsc->mdsc->mdsmap)
  29                 return 0;
  30         mdsmap = fsc->mdsc->mdsmap;
  31         seq_printf(s, "epoch %d\n", mdsmap->m_epoch);
  32         seq_printf(s, "root %d\n", mdsmap->m_root);
  33         seq_printf(s, "max_mds %d\n", mdsmap->m_max_mds);
  34         seq_printf(s, "session_timeout %d\n", mdsmap->m_session_timeout);
  35         seq_printf(s, "session_autoclose %d\n", mdsmap->m_session_autoclose);
  36         for (i = 0; i < mdsmap->m_num_mds; i++) {
  37                 struct ceph_entity_addr *addr = &mdsmap->m_info[i].addr;
  38                 int state = mdsmap->m_info[i].state;
  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 mds_sessions_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_auth_client *ac = fsc->client->monc.auth;
 147         struct ceph_options *opt = fsc->client->options;
 148         int mds = -1;
 149
 150         mutex_lock(&mdsc->mutex);
 151
 152         /* The 'num' portion of an 'entity name' */
 153         seq_printf(s, "global_id %llu\n", ac->global_id);
 154
 155         /* The -o name mount argument */
 156         seq_printf(s, "name \"%s\"\n", opt->name ? opt->name : "");
 157
 158         /* The list of MDS session rank+state */
 159         for (mds = 0; mds < mdsc->max_sessions; mds++) {
 160                 struct ceph_mds_session *session =
 161                         __ceph_lookup_mds_session(mdsc, mds);
 162                 if (!session) {
 163                         continue;
 164                 }
 165                 mutex_unlock(&mdsc->mutex);
 166                 seq_printf(s, "mds.%d %s\n",
 167                                 session->s_mds,
 168                                 ceph_session_state_name(session->s_state));
 169
 170                 ceph_put_mds_session(session);
 171                 mutex_lock(&mdsc->mutex);
 172         }
 173         mutex_unlock(&mdsc->mutex);
 174
 175         return 0;
 176 }
 177
 178 CEPH_DEFINE_SHOW_FUNC(mdsmap_show)
 179 CEPH_DEFINE_SHOW_FUNC(mdsc_show)
 180 CEPH_DEFINE_SHOW_FUNC(caps_show)
 181 CEPH_DEFINE_SHOW_FUNC(mds_sessions_show)
 182
 183
 184 /*
 185  * debugfs
 186  */
 187 static int congestion_kb_set(void *data, u64 val)
 188 {
 189         struct ceph_fs_client *fsc = (struct ceph_fs_client *)data;
 190
 191         fsc->mount_options->congestion_kb = (int)val;
 192         return 0;
 193 }
 194
 195 static int congestion_kb_get(void *data, u64 *val)
 196 {
 197         struct ceph_fs_client *fsc = (struct ceph_fs_client *)data;
 198
 199         *val = (u64)fsc->mount_options->congestion_kb;
 200         return 0;
 201 }
 202
 203 DEFINE_SIMPLE_ATTRIBUTE(congestion_kb_fops, congestion_kb_get,
 204                         congestion_kb_set, "%llu\n");
 205
 206
 207 void ceph_fs_debugfs_cleanup(struct ceph_fs_client *fsc)
 208 {
 209         dout("ceph_fs_debugfs_cleanup\n");
 210         debugfs_remove(fsc->debugfs_bdi);
 211         debugfs_remove(fsc->debugfs_congestion_kb);
 212         debugfs_remove(fsc->debugfs_mdsmap);
 213         debugfs_remove(fsc->debugfs_mds_sessions);
 214         debugfs_remove(fsc->debugfs_caps);
 215         debugfs_remove(fsc->debugfs_mdsc);
 216 }
 217
 218 int ceph_fs_debugfs_init(struct ceph_fs_client *fsc)
 219 {
 220         char name[100];
 221         int err = -ENOMEM;
 222
 223         dout("ceph_fs_debugfs_init\n");
 224         BUG_ON(!fsc->client->debugfs_dir);
 225         fsc->debugfs_congestion_kb =
 226                 debugfs_create_file("writeback_congestion_kb",
 227                                     0600,
 228                                     fsc->client->debugfs_dir,
 229                                     fsc,
 230                                     &congestion_kb_fops);
 231         if (!fsc->debugfs_congestion_kb)
 232                 goto out;
 233
 234         snprintf(name, sizeof(name), "../../bdi/%s",
 235                  dev_name(fsc->sb->s_bdi->dev));
 236         fsc->debugfs_bdi =
 237                 debugfs_create_symlink("bdi",
 238                                        fsc->client->debugfs_dir,
 239                                        name);
 240         if (!fsc->debugfs_bdi)
 241                 goto out;
 242
 243         fsc->debugfs_mdsmap = debugfs_create_file("mdsmap",
 244                                         0400,
 245                                         fsc->client->debugfs_dir,
 246                                         fsc,
 247                                         &mdsmap_show_fops);
 248         if (!fsc->debugfs_mdsmap)
 249                 goto out;
 250
 251         fsc->debugfs_mds_sessions = debugfs_create_file("mds_sessions",
 252                                         0400,
 253                                         fsc->client->debugfs_dir,
 254                                         fsc,
 255                                         &mds_sessions_show_fops);
 256         if (!fsc->debugfs_mds_sessions)
 257                 goto out;
 258
 259         fsc->debugfs_mdsc = debugfs_create_file("mdsc",
 260                                                 0400,
 261                                                 fsc->client->debugfs_dir,
 262                                                 fsc,
 263                                                 &mdsc_show_fops);
 264         if (!fsc->debugfs_mdsc)
 265                 goto out;
 266
 267         fsc->debugfs_caps = debugfs_create_file("caps",
 268                                                    0400,
 269                                                    fsc->client->debugfs_dir,
 270                                                    fsc,
 271                                                    &caps_show_fops);
 272         if (!fsc->debugfs_caps)
 273                 goto out;
 274
 275         return 0;
 276
 277 out:
 278         ceph_fs_debugfs_cleanup(fsc);
 279         return err;
 280 }
 281
 282
 283 #else  /* CONFIG_DEBUG_FS */
 284
 285 int ceph_fs_debugfs_init(struct ceph_fs_client *fsc)
 286 {
 287         return 0;
 288 }
 289
 290 void ceph_fs_debugfs_cleanup(struct ceph_fs_client *fsc)
 291 {
 292 }
 293
 294 #endif  /* CONFIG_DEBUG_FS */