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>
44 #include <dt_object.h>
45 #include <obd_support.h>
46 #include <lustre_fld.h>
47 #include <lustre_fid.h>
48 #include "fld_internal.h"
52 fld_proc_targets_seq_show(struct seq_file *m, void *unused)
54 struct lu_client_fld *fld = (struct lu_client_fld *)m->private;
55 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);
68 fld_proc_hash_seq_show(struct seq_file *m, void *unused)
70 struct lu_client_fld *fld = (struct lu_client_fld *)m->private;
75 spin_lock(&fld->lcf_lock);
76 seq_printf(m, "%s\n", fld->lcf_hash->fh_name);
77 spin_unlock(&fld->lcf_lock);
83 fld_proc_hash_seq_write(struct file *file, const char __user *buffer,
84 size_t count, loff_t *off)
86 struct lu_client_fld *fld;
87 struct lu_fld_hash *hash = NULL;
91 if (count > sizeof(fh_name))
94 if (copy_from_user(fh_name, buffer, count) != 0)
97 fld = ((struct seq_file *)file->private_data)->private;
100 for (i = 0; fld_hash[i].fh_name != NULL; i++) {
101 if (count != strlen(fld_hash[i].fh_name))
104 if (!strncmp(fld_hash[i].fh_name, fh_name, count)) {
111 spin_lock(&fld->lcf_lock);
112 fld->lcf_hash = hash;
113 spin_unlock(&fld->lcf_lock);
115 CDEBUG(D_INFO, "%s: Changed hash to \"%s\"\n",
116 fld->lcf_name, hash->fh_name);
123 lprocfs_cache_flush_seq_write(struct file *file, const char __user *buffer,
124 size_t count, loff_t *pos)
126 struct lu_client_fld *fld = ((struct seq_file *)file->private_data)->private;
129 LASSERT(fld != NULL);
131 fld_cache_flush(fld->lcf_cache);
133 CDEBUG(D_INFO, "%s: Lookup cache is flushed\n", fld->lcf_name);
138 LPROC_SEQ_FOPS_RO(fld_proc_targets);
139 LPROC_SEQ_FOPS(fld_proc_hash);
140 LPROC_SEQ_FOPS_WO_TYPE(fld, cache_flush);
142 struct lprocfs_vars fld_client_proc_list[] = {
144 .fops = &fld_proc_targets_fops },
146 .fops = &fld_proc_hash_fops },
147 { .name = "cache_flush",
148 .fops = &fld_cache_flush_fops },
152 #ifdef HAVE_SERVER_SUPPORT
153 struct fld_seq_param {
154 struct lu_env fsp_env;
155 struct dt_it *fsp_it;
156 struct lu_server_fld *fsp_fld;
157 unsigned int fsp_stop:1;
160 static void *fldb_seq_start(struct seq_file *p, loff_t *pos)
162 struct fld_seq_param *param = p->private;
163 struct lu_server_fld *fld;
164 struct dt_object *obj;
165 const struct dt_it_ops *iops;
169 if (param == NULL || param->fsp_stop)
172 fld = param->fsp_fld;
174 LASSERT(obj != NULL);
175 iops = &obj->do_index_ops->dio_it;
177 rc = iops->load(¶m->fsp_env, param->fsp_it, *pos);
181 key = iops->key(¶m->fsp_env, param->fsp_it);
185 *pos = be64_to_cpu(*(__u64 *)key);
190 static void fldb_seq_stop(struct seq_file *p, void *v)
192 struct fld_seq_param *param = p->private;
193 const struct dt_it_ops *iops;
194 struct lu_server_fld *fld;
195 struct dt_object *obj;
200 fld = param->fsp_fld;
202 LASSERT(obj != NULL);
203 iops = &obj->do_index_ops->dio_it;
205 iops->put(¶m->fsp_env, param->fsp_it);
208 static void *fldb_seq_next(struct seq_file *p, void *v, loff_t *pos)
210 struct fld_seq_param *param = p->private;
211 struct lu_server_fld *fld;
212 struct dt_object *obj;
213 const struct dt_it_ops *iops;
216 if (param == NULL || param->fsp_stop)
219 fld = param->fsp_fld;
221 LASSERT(obj != NULL);
222 iops = &obj->do_index_ops->dio_it;
224 rc = iops->next(¶m->fsp_env, param->fsp_it);
230 *pos = be64_to_cpu(*(__u64 *)iops->key(¶m->fsp_env, param->fsp_it));
234 static int fldb_seq_show(struct seq_file *p, void *v)
236 struct fld_seq_param *param = p->private;
237 struct lu_server_fld *fld;
238 struct dt_object *obj;
239 const struct dt_it_ops *iops;
240 struct fld_thread_info *info;
241 struct lu_seq_range *fld_rec;
244 if (param == NULL || param->fsp_stop)
247 fld = param->fsp_fld;
249 LASSERT(obj != NULL);
250 iops = &obj->do_index_ops->dio_it;
252 info = lu_context_key_get(¶m->fsp_env.le_ctx,
254 fld_rec = &info->fti_rec;
255 rc = iops->rec(¶m->fsp_env, param->fsp_it,
256 (struct dt_rec *)fld_rec, 0);
258 CERROR("%s:read record error: rc %d\n",
260 } else if (fld_rec->lsr_start != 0) {
261 range_be_to_cpu(fld_rec, fld_rec);
262 seq_printf(p, DRANGE"\n", PRANGE(fld_rec));
268 struct seq_operations fldb_sops = {
269 .start = fldb_seq_start,
270 .stop = fldb_seq_stop,
271 .next = fldb_seq_next,
272 .show = fldb_seq_show,
275 static int fldb_seq_open(struct inode *inode, struct file *file)
277 struct seq_file *seq;
278 struct lu_server_fld *fld = (struct lu_server_fld *)PDE_DATA(inode);
279 struct dt_object *obj;
280 const struct dt_it_ops *iops;
281 struct fld_seq_param *param = NULL;
285 rc = LPROCFS_ENTRY_CHECK(inode);
289 rc = seq_open(file, &fldb_sops);
295 seq = file->private_data;
300 OBD_ALLOC_PTR(param);
302 GOTO(out, rc = -ENOMEM);
304 rc = lu_env_init(¶m->fsp_env, LCT_MD_THREAD);
309 iops = &obj->do_index_ops->dio_it;
310 param->fsp_it = iops->init(¶m->fsp_env, obj, 0);
311 if (IS_ERR(param->fsp_it))
312 GOTO(out, rc = PTR_ERR(param->fsp_it));
314 param->fsp_fld = fld;
317 seq = file->private_data;
318 seq->private = param;
322 lu_env_fini(¶m->fsp_env);
329 static int fldb_seq_release(struct inode *inode, struct file *file)
331 struct seq_file *seq = file->private_data;
332 struct fld_seq_param *param;
333 struct lu_server_fld *fld;
334 struct dt_object *obj;
335 const struct dt_it_ops *iops;
337 param = seq->private;
339 lprocfs_seq_release(inode, file);
343 fld = param->fsp_fld;
345 LASSERT(obj != NULL);
346 iops = &obj->do_index_ops->dio_it;
348 LASSERT(iops != NULL);
349 LASSERT(param->fsp_it != NULL);
350 iops->fini(¶m->fsp_env, param->fsp_it);
351 lu_env_fini(¶m->fsp_env);
353 lprocfs_seq_release(inode, file);
358 const struct file_operations fld_proc_seq_fops = {
359 .owner = THIS_MODULE,
360 .open = fldb_seq_open,
362 .release = fldb_seq_release,
365 struct lprocfs_vars fld_server_proc_list[] = {
369 # endif /* HAVE_SERVER_SUPPORT */
371 #endif /* CONFIG_PROC_FS */