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),
  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 = 0;
  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                         ceph_mdsc_free_path(path, pathlen);
  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                         ceph_mdsc_free_path(path, pathlen);
 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_cb(struct inode *inode, struct ceph_cap *cap, void *p)
 128 {
 129         struct seq_file *s = p;
 130
 131         seq_printf(s, "0x%-17lx%-17s%-17s\n", inode->i_ino,
 132                    ceph_cap_string(cap->issued),
 133                    ceph_cap_string(cap->implemented));
 134         return 0;
 135 }
 136
 137 static int caps_show(struct seq_file *s, void *p)
 138 {
 139         struct ceph_fs_client *fsc = s->private;
 140         struct ceph_mds_client *mdsc = fsc->mdsc;
 141         int total, avail, used, reserved, min, i;
 142
 143         ceph_reservation_status(fsc, &total, &avail, &used, &reserved, &min);
 144         seq_printf(s, "total\t\t%d\n"
 145                    "avail\t\t%d\n"
 146                    "used\t\t%d\n"
 147                    "reserved\t%d\n"
 148                    "min\t\t%d\n\n",
 149                    total, avail, used, reserved, min);
 150         seq_printf(s, "ino                issued           implemented\n");
 151         seq_printf(s, "-----------------------------------------------\n");
 152
 153         mutex_lock(&mdsc->mutex);
 154         for (i = 0; i < mdsc->max_sessions; i++) {
 155                 struct ceph_mds_session *session;
 156
 157                 session = __ceph_lookup_mds_session(mdsc, i);
 158                 if (!session)
 159                         continue;
 160                 mutex_unlock(&mdsc->mutex);
 161                 mutex_lock(&session->s_mutex);
 162                 ceph_iterate_session_caps(session, caps_show_cb, s);
 163                 mutex_unlock(&session->s_mutex);
 164                 ceph_put_mds_session(session);
 165                 mutex_lock(&mdsc->mutex);
 166         }
 167         mutex_unlock(&mdsc->mutex);
 168
 169         return 0;
 170 }
 171
 172 static int mds_sessions_show(struct seq_file *s, void *ptr)
 173 {
 174         struct ceph_fs_client *fsc = s->private;
 175         struct ceph_mds_client *mdsc = fsc->mdsc;
 176         struct ceph_auth_client *ac = fsc->client->monc.auth;
 177         struct ceph_options *opt = fsc->client->options;
 178         int mds = -1;
 179
 180         mutex_lock(&mdsc->mutex);
 181
 182         /* The 'num' portion of an 'entity name' */
 183         seq_printf(s, "global_id %llu\n", ac->global_id);
 184
 185         /* The -o name mount argument */
 186         seq_printf(s, "name \"%s\"\n", opt->name ? opt->name : "");
 187
 188         /* The list of MDS session rank+state */
 189         for (mds = 0; mds < mdsc->max_sessions; mds++) {
 190                 struct ceph_mds_session *session =
 191                         __ceph_lookup_mds_session(mdsc, mds);
 192                 if (!session) {
 193                         continue;
 194                 }
 195                 mutex_unlock(&mdsc->mutex);
 196                 seq_printf(s, "mds.%d %s\n",
 197                                 session->s_mds,
 198                                 ceph_session_state_name(session->s_state));
 199
 200                 ceph_put_mds_session(session);
 201                 mutex_lock(&mdsc->mutex);
 202         }
 203         mutex_unlock(&mdsc->mutex);
 204
 205         return 0;
 206 }
 207
 208 CEPH_DEFINE_SHOW_FUNC(mdsmap_show)
 209 CEPH_DEFINE_SHOW_FUNC(mdsc_show)
 210 CEPH_DEFINE_SHOW_FUNC(caps_show)
 211 CEPH_DEFINE_SHOW_FUNC(mds_sessions_show)
 212
 213
 214 /*
 215  * debugfs
 216  */
 217 static int congestion_kb_set(void *data, u64 val)
 218 {
 219         struct ceph_fs_client *fsc = (struct ceph_fs_client *)data;
 220
 221         fsc->mount_options->congestion_kb = (int)val;
 222         return 0;
 223 }
 224
 225 static int congestion_kb_get(void *data, u64 *val)
 226 {
 227         struct ceph_fs_client *fsc = (struct ceph_fs_client *)data;
 228
 229         *val = (u64)fsc->mount_options->congestion_kb;
 230         return 0;
 231 }
 232
 233 DEFINE_SIMPLE_ATTRIBUTE(congestion_kb_fops, congestion_kb_get,
 234                         congestion_kb_set, "%llu\n");
 235
 236
 237 void ceph_fs_debugfs_cleanup(struct ceph_fs_client *fsc)
 238 {
 239         dout("ceph_fs_debugfs_cleanup\n");
 240         debugfs_remove(fsc->debugfs_bdi);
 241         debugfs_remove(fsc->debugfs_congestion_kb);
 242         debugfs_remove(fsc->debugfs_mdsmap);
 243         debugfs_remove(fsc->debugfs_mds_sessions);
 244         debugfs_remove(fsc->debugfs_caps);
 245         debugfs_remove(fsc->debugfs_mdsc);
 246 }
 247
 248 void ceph_fs_debugfs_init(struct ceph_fs_client *fsc)
 249 {
 250         char name[100];
 251
 252         dout("ceph_fs_debugfs_init\n");
 253         fsc->debugfs_congestion_kb =
 254                 debugfs_create_file("writeback_congestion_kb",
 255                                     0600,
 256                                     fsc->client->debugfs_dir,
 257                                     fsc,
 258                                     &congestion_kb_fops);
 259
 260         snprintf(name, sizeof(name), "../../bdi/%s",
 261                  dev_name(fsc->sb->s_bdi->dev));
 262         fsc->debugfs_bdi =
 263                 debugfs_create_symlink("bdi",
 264                                        fsc->client->debugfs_dir,
 265                                        name);
 266
 267         fsc->debugfs_mdsmap = debugfs_create_file("mdsmap",
 268                                         0400,
 269                                         fsc->client->debugfs_dir,
 270                                         fsc,
 271                                         &mdsmap_show_fops);
 272
 273         fsc->debugfs_mds_sessions = debugfs_create_file("mds_sessions",
 274                                         0400,
 275                                         fsc->client->debugfs_dir,
 276                                         fsc,
 277                                         &mds_sessions_show_fops);
 278
 279         fsc->debugfs_mdsc = debugfs_create_file("mdsc",
 280                                                 0400,
 281                                                 fsc->client->debugfs_dir,
 282                                                 fsc,
 283                                                 &mdsc_show_fops);
 284
 285         fsc->debugfs_caps = debugfs_create_file("caps",
 286                                                    0400,
 287                                                    fsc->client->debugfs_dir,
 288                                                    fsc,
 289                                                    &caps_show_fops);
 290 }
 291
 292
 293 #else  /* CONFIG_DEBUG_FS */
 294
 295 void ceph_fs_debugfs_init(struct ceph_fs_client *fsc)
 296 {
 297         return 0;
 298 }
 299
 300 void ceph_fs_debugfs_cleanup(struct ceph_fs_client *fsc)
 301 {
 302 }
 303
 304 #endif  /* CONFIG_DEBUG_FS */