4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; If not, see
18 * http://www.gnu.org/licenses/gpl-2.0.html
23 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Use is subject to license terms.
26 * Copyright (c) 2012, 2016, Intel Corporation.
29 * This file is part of Lustre, http://www.lustre.org/
30 * Lustre is a trademark of Sun Microsystems, Inc.
32 * lustre/fld/lproc_fld.c
34 * FLD (FIDs Location Database)
36 * Author: Yury Umanets <umka@clusterfs.com>
37 * Di Wang <di.wang@whamcloud.com>
40 #define DEBUG_SUBSYSTEM S_FLD
42 #include <libcfs/libcfs.h>
43 #include <linux/module.h>
45 #ifdef HAVE_SERVER_SUPPORT
46 #include <dt_object.h>
48 #include <obd_support.h>
49 #include <lustre_fld.h>
50 #include <lustre_fid.h>
51 #include "fld_internal.h"
54 fld_debugfs_targets_seq_show(struct seq_file *m, void *unused)
56 struct lu_client_fld *fld = (struct lu_client_fld *)m->private;
57 struct lu_fld_target *target;
60 spin_lock(&fld->lcf_lock);
61 list_for_each_entry(target, &fld->lcf_targets, ft_chain)
62 seq_printf(m, "%s\n", fld_target_name(target));
63 spin_unlock(&fld->lcf_lock);
69 fld_debugfs_hash_seq_show(struct seq_file *m, void *unused)
71 struct lu_client_fld *fld = (struct lu_client_fld *)m->private;
74 spin_lock(&fld->lcf_lock);
75 seq_printf(m, "%s\n", fld->lcf_hash->fh_name);
76 spin_unlock(&fld->lcf_lock);
82 fld_debugfs_hash_seq_write(struct file *file, const char __user *buffer,
83 size_t count, loff_t *off)
85 struct lu_client_fld *fld;
86 struct lu_fld_hash *hash = NULL;
90 if (count > sizeof(fh_name))
93 if (copy_from_user(fh_name, buffer, count) != 0)
96 fld = ((struct seq_file *)file->private_data)->private;
98 for (i = 0; fld_hash[i].fh_name; i++) {
99 if (count != strlen(fld_hash[i].fh_name))
102 if (!strncmp(fld_hash[i].fh_name, fh_name, count)) {
109 spin_lock(&fld->lcf_lock);
110 fld->lcf_hash = hash;
111 spin_unlock(&fld->lcf_lock);
113 CDEBUG(D_INFO, "%s: Changed hash to \"%s\"\n",
114 fld->lcf_name, hash->fh_name);
120 static ssize_t ldebugfs_cache_flush_seq_write(struct file *file,
121 const char __user *buffer,
122 size_t count, loff_t *pos)
124 struct seq_file *m = file->private_data;
125 struct lu_client_fld *fld = m->private;
128 fld_cache_flush(fld->lcf_cache);
130 CDEBUG(D_INFO, "%s: Lookup cache is flushed\n", fld->lcf_name);
135 LDEBUGFS_SEQ_FOPS_RO(fld_debugfs_targets);
136 LDEBUGFS_SEQ_FOPS(fld_debugfs_hash);
137 LDEBUGFS_FOPS_WR_ONLY(fld, cache_flush);
139 struct lprocfs_vars fld_client_debugfs_list[] = {
141 .fops = &fld_debugfs_targets_fops },
143 .fops = &fld_debugfs_hash_fops },
144 { .name = "cache_flush",
145 .fops = &fld_cache_flush_fops },
149 #ifdef HAVE_SERVER_SUPPORT
150 struct fld_seq_param {
151 struct lu_env fsp_env;
152 struct dt_it *fsp_it;
153 struct lu_server_fld *fsp_fld;
154 unsigned int fsp_stop:1;
157 static void *fldb_seq_start(struct seq_file *p, loff_t *pos)
159 struct fld_seq_param *param = p->private;
160 struct lu_server_fld *fld;
161 struct dt_object *obj;
162 const struct dt_it_ops *iops;
166 if (param == NULL || param->fsp_stop)
169 fld = param->fsp_fld;
171 LASSERT(obj != NULL);
172 iops = &obj->do_index_ops->dio_it;
174 rc = iops->load(¶m->fsp_env, param->fsp_it, *pos);
178 key = iops->key(¶m->fsp_env, param->fsp_it);
182 *pos = be64_to_cpu(*(__u64 *)key);
187 static void fldb_seq_stop(struct seq_file *p, void *v)
189 struct fld_seq_param *param = p->private;
190 const struct dt_it_ops *iops;
191 struct lu_server_fld *fld;
192 struct dt_object *obj;
197 fld = param->fsp_fld;
199 LASSERT(obj != NULL);
200 iops = &obj->do_index_ops->dio_it;
202 iops->put(¶m->fsp_env, param->fsp_it);
205 static void *fldb_seq_next(struct seq_file *p, void *v, loff_t *pos)
207 struct fld_seq_param *param = p->private;
208 struct lu_server_fld *fld;
209 struct dt_object *obj;
210 const struct dt_it_ops *iops;
213 if (param == NULL || param->fsp_stop)
216 fld = param->fsp_fld;
218 LASSERT(obj != NULL);
219 iops = &obj->do_index_ops->dio_it;
221 rc = iops->next(¶m->fsp_env, param->fsp_it);
227 *pos = be64_to_cpu(*(__u64 *)iops->key(¶m->fsp_env, param->fsp_it));
231 static int fldb_seq_show(struct seq_file *p, void *v)
233 struct fld_seq_param *param = p->private;
234 struct lu_server_fld *fld;
235 struct dt_object *obj;
236 const struct dt_it_ops *iops;
237 struct fld_thread_info *info;
238 struct lu_seq_range *fld_rec;
241 if (param == NULL || param->fsp_stop)
244 fld = param->fsp_fld;
246 LASSERT(obj != NULL);
247 iops = &obj->do_index_ops->dio_it;
249 info = lu_context_key_get(¶m->fsp_env.le_ctx,
251 fld_rec = &info->fti_rec;
252 rc = iops->rec(¶m->fsp_env, param->fsp_it,
253 (struct dt_rec *)fld_rec, 0);
255 CERROR("%s:read record error: rc %d\n",
257 } else if (fld_rec->lsr_start != 0) {
258 range_be_to_cpu(fld_rec, fld_rec);
259 seq_printf(p, DRANGE"\n", PRANGE(fld_rec));
265 struct seq_operations fldb_sops = {
266 .start = fldb_seq_start,
267 .stop = fldb_seq_stop,
268 .next = fldb_seq_next,
269 .show = fldb_seq_show,
272 static int fldb_seq_open(struct inode *inode, struct file *file)
274 struct seq_file *seq;
275 struct lu_server_fld *fld = inode->i_private;
276 struct dt_object *obj;
277 const struct dt_it_ops *iops;
278 struct fld_seq_param *param = NULL;
282 rc = seq_open(file, &fldb_sops);
288 seq = file->private_data;
293 OBD_ALLOC_PTR(param);
295 GOTO(out, rc = -ENOMEM);
297 rc = lu_env_init(¶m->fsp_env, LCT_MD_THREAD);
302 iops = &obj->do_index_ops->dio_it;
303 param->fsp_it = iops->init(¶m->fsp_env, obj, 0);
304 if (IS_ERR(param->fsp_it))
305 GOTO(out, rc = PTR_ERR(param->fsp_it));
307 param->fsp_fld = fld;
310 seq = file->private_data;
311 seq->private = param;
315 lu_env_fini(¶m->fsp_env);
322 static int fldb_seq_release(struct inode *inode, struct file *file)
324 struct seq_file *seq = file->private_data;
325 struct fld_seq_param *param;
326 struct lu_server_fld *fld;
327 struct dt_object *obj;
328 const struct dt_it_ops *iops;
330 param = seq->private;
332 lprocfs_seq_release(inode, file);
336 fld = param->fsp_fld;
338 LASSERT(obj != NULL);
339 iops = &obj->do_index_ops->dio_it;
341 LASSERT(iops != NULL);
342 LASSERT(param->fsp_it != NULL);
343 iops->fini(¶m->fsp_env, param->fsp_it);
344 lu_env_fini(¶m->fsp_env);
346 lprocfs_seq_release(inode, file);
351 const struct file_operations fld_debugfs_seq_fops = {
352 .owner = THIS_MODULE,
353 .open = fldb_seq_open,
355 .release = fldb_seq_release,
358 # endif /* HAVE_SERVER_SUPPORT */