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 dentry_lru_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_dentry_info *di; 147 148 spin_lock(&mdsc->dentry_lru_lock); 149 list_for_each_entry(di, &mdsc->dentry_lru, lru) { 150 struct dentry *dentry = di->dentry; 151 seq_printf(s, "%p %p\t%pd\n", 152 di, dentry, dentry); 153 } 154 spin_unlock(&mdsc->dentry_lru_lock); 155 156 return 0; 157 } 158 159 static int mds_sessions_show(struct seq_file *s, void *ptr) 160 { 161 struct ceph_fs_client *fsc = s->private; 162 struct ceph_mds_client *mdsc = fsc->mdsc; 163 struct ceph_auth_client *ac = fsc->client->monc.auth; 164 struct ceph_options *opt = fsc->client->options; 165 int mds = -1; 166 167 mutex_lock(&mdsc->mutex); 168 169 /* The 'num' portion of an 'entity name' */ 170 seq_printf(s, "global_id %llu\n", ac->global_id); 171 172 /* The -o name mount argument */ 173 seq_printf(s, "name \"%s\"\n", opt->name ? opt->name : ""); 174 175 /* The list of MDS session rank+state */ 176 for (mds = 0; mds < mdsc->max_sessions; mds++) { 177 struct ceph_mds_session *session = 178 __ceph_lookup_mds_session(mdsc, mds); 179 if (!session) { 180 continue; 181 } 182 mutex_unlock(&mdsc->mutex); 183 seq_printf(s, "mds.%d %s\n", 184 session->s_mds, 185 ceph_session_state_name(session->s_state)); 186 187 ceph_put_mds_session(session); 188 mutex_lock(&mdsc->mutex); 189 } 190 mutex_unlock(&mdsc->mutex); 191 192 return 0; 193 } 194 195 CEPH_DEFINE_SHOW_FUNC(mdsmap_show) 196 CEPH_DEFINE_SHOW_FUNC(mdsc_show) 197 CEPH_DEFINE_SHOW_FUNC(caps_show) 198 CEPH_DEFINE_SHOW_FUNC(dentry_lru_show) 199 CEPH_DEFINE_SHOW_FUNC(mds_sessions_show) 200 201 202 /* 203 * debugfs 204 */ 205 static int congestion_kb_set(void *data, u64 val) 206 { 207 struct ceph_fs_client *fsc = (struct ceph_fs_client *)data; 208 209 fsc->mount_options->congestion_kb = (int)val; 210 return 0; 211 } 212 213 static int congestion_kb_get(void *data, u64 *val) 214 { 215 struct ceph_fs_client *fsc = (struct ceph_fs_client *)data; 216 217 *val = (u64)fsc->mount_options->congestion_kb; 218 return 0; 219 } 220 221 DEFINE_SIMPLE_ATTRIBUTE(congestion_kb_fops, congestion_kb_get, 222 congestion_kb_set, "%llu\n"); 223 224 225 void ceph_fs_debugfs_cleanup(struct ceph_fs_client *fsc) 226 { 227 dout("ceph_fs_debugfs_cleanup\n"); 228 debugfs_remove(fsc->debugfs_bdi); 229 debugfs_remove(fsc->debugfs_congestion_kb); 230 debugfs_remove(fsc->debugfs_mdsmap); 231 debugfs_remove(fsc->debugfs_mds_sessions); 232 debugfs_remove(fsc->debugfs_caps); 233 debugfs_remove(fsc->debugfs_mdsc); 234 debugfs_remove(fsc->debugfs_dentry_lru); 235 } 236 237 int ceph_fs_debugfs_init(struct ceph_fs_client *fsc) 238 { 239 char name[100]; 240 int err = -ENOMEM; 241 242 dout("ceph_fs_debugfs_init\n"); 243 BUG_ON(!fsc->client->debugfs_dir); 244 fsc->debugfs_congestion_kb = 245 debugfs_create_file("writeback_congestion_kb", 246 0600, 247 fsc->client->debugfs_dir, 248 fsc, 249 &congestion_kb_fops); 250 if (!fsc->debugfs_congestion_kb) 251 goto out; 252 253 snprintf(name, sizeof(name), "../../bdi/%s", 254 dev_name(fsc->sb->s_bdi->dev)); 255 fsc->debugfs_bdi = 256 debugfs_create_symlink("bdi", 257 fsc->client->debugfs_dir, 258 name); 259 if (!fsc->debugfs_bdi) 260 goto out; 261 262 fsc->debugfs_mdsmap = debugfs_create_file("mdsmap", 263 0600, 264 fsc->client->debugfs_dir, 265 fsc, 266 &mdsmap_show_fops); 267 if (!fsc->debugfs_mdsmap) 268 goto out; 269 270 fsc->debugfs_mds_sessions = debugfs_create_file("mds_sessions", 271 0600, 272 fsc->client->debugfs_dir, 273 fsc, 274 &mds_sessions_show_fops); 275 if (!fsc->debugfs_mds_sessions) 276 goto out; 277 278 fsc->debugfs_mdsc = debugfs_create_file("mdsc", 279 0600, 280 fsc->client->debugfs_dir, 281 fsc, 282 &mdsc_show_fops); 283 if (!fsc->debugfs_mdsc) 284 goto out; 285 286 fsc->debugfs_caps = debugfs_create_file("caps", 287 0400, 288 fsc->client->debugfs_dir, 289 fsc, 290 &caps_show_fops); 291 if (!fsc->debugfs_caps) 292 goto out; 293 294 fsc->debugfs_dentry_lru = debugfs_create_file("dentry_lru", 295 0600, 296 fsc->client->debugfs_dir, 297 fsc, 298 &dentry_lru_show_fops); 299 if (!fsc->debugfs_dentry_lru) 300 goto out; 301 302 return 0; 303 304 out: 305 ceph_fs_debugfs_cleanup(fsc); 306 return err; 307 } 308 309 310 #else /* CONFIG_DEBUG_FS */ 311 312 int ceph_fs_debugfs_init(struct ceph_fs_client *fsc) 313 { 314 return 0; 315 } 316 317 void ceph_fs_debugfs_cleanup(struct ceph_fs_client *fsc) 318 { 319 } 320 321 #endif /* CONFIG_DEBUG_FS */ 322