linux/fs/ceph/debugfs.c
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   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
  21static 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 */
  49static 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
 126static 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
 141static 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
 158CEPH_DEFINE_SHOW_FUNC(mdsmap_show)
 159CEPH_DEFINE_SHOW_FUNC(mdsc_show)
 160CEPH_DEFINE_SHOW_FUNC(caps_show)
 161CEPH_DEFINE_SHOW_FUNC(dentry_lru_show)
 162
 163
 164/*
 165 * debugfs
 166 */
 167static 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
 175static 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
 183DEFINE_SIMPLE_ATTRIBUTE(congestion_kb_fops, congestion_kb_get,
 184                        congestion_kb_set, "%llu\n");
 185
 186
 187void 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
 198int 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
 257out:
 258        ceph_fs_debugfs_cleanup(fsc);
 259        return err;
 260}
 261
 262
 263#else  /* CONFIG_DEBUG_FS */
 264
 265int ceph_fs_debugfs_init(struct ceph_fs_client *fsc)
 266{
 267        return 0;
 268}
 269
 270void ceph_fs_debugfs_cleanup(struct ceph_fs_client *fsc)
 271{
 272}
 273
 274#endif  /* CONFIG_DEBUG_FS */
 275
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