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13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
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18 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
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21 * CA 95054 USA or visit www.sun.com if you need additional information or
27 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
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30 * Copyright (c) 2012, 2013, Intel Corporation.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
36 * lustre/fld/lproc_fld.c
38 * FLD (FIDs Location Database)
40 * Author: Yury Umanets <umka@clusterfs.com>
41 * Di Wang <di.wang@whamcloud.com>
44 #define DEBUG_SUBSYSTEM S_FLD
47 # include <libcfs/libcfs.h>
48 # include <linux/module.h>
49 #else /* __KERNEL__ */
50 # include <liblustre.h>
54 #include <obd_class.h>
55 #include <dt_object.h>
56 #include <md_object.h>
57 #include <obd_support.h>
58 #include <lustre_req_layout.h>
59 #include <lustre_fld.h>
60 #include <lustre_fid.h>
61 #include "fld_internal.h"
65 fld_proc_read_targets(char *page, char **start, off_t off,
66 int count, int *eof, void *data)
68 struct lu_client_fld *fld = (struct lu_client_fld *)data;
69 struct lu_fld_target *target;
75 spin_lock(&fld->lcf_lock);
76 cfs_list_for_each_entry(target,
77 &fld->lcf_targets, ft_chain)
79 rc = snprintf(page, count, "%s\n",
80 fld_target_name(target));
87 spin_unlock(&fld->lcf_lock);
92 fld_proc_read_hash(char *page, char **start, off_t off,
93 int count, int *eof, void *data)
95 struct lu_client_fld *fld = (struct lu_client_fld *)data;
101 spin_lock(&fld->lcf_lock);
102 rc = snprintf(page, count, "%s\n", fld->lcf_hash->fh_name);
103 spin_unlock(&fld->lcf_lock);
109 fld_proc_write_hash(struct file *file, const char *buffer,
110 unsigned long count, void *data)
112 struct lu_client_fld *fld = (struct lu_client_fld *)data;
113 struct lu_fld_hash *hash = NULL;
117 LASSERT(fld != NULL);
119 for (i = 0; fld_hash[i].fh_name != NULL; i++) {
120 if (count != strlen(fld_hash[i].fh_name))
123 if (!strncmp(fld_hash[i].fh_name, buffer, count)) {
130 spin_lock(&fld->lcf_lock);
131 fld->lcf_hash = hash;
132 spin_unlock(&fld->lcf_lock);
134 CDEBUG(D_INFO, "%s: Changed hash to \"%s\"\n",
135 fld->lcf_name, hash->fh_name);
142 fld_proc_write_cache_flush(struct file *file, const char *buffer,
143 unsigned long count, void *data)
145 struct lu_client_fld *fld = (struct lu_client_fld *)data;
148 LASSERT(fld != NULL);
150 fld_cache_flush(fld->lcf_cache);
152 CDEBUG(D_INFO, "%s: Lookup cache is flushed\n", fld->lcf_name);
157 struct fld_seq_param {
158 struct lu_env fsp_env;
159 struct dt_it *fsp_it;
160 struct lu_server_fld *fsp_fld;
161 unsigned int fsp_stop:1;
164 static void *fldb_seq_start(struct seq_file *p, loff_t *pos)
166 struct fld_seq_param *param = p->private;
167 struct lu_server_fld *fld;
168 struct dt_object *obj;
169 const struct dt_it_ops *iops;
171 if (param == NULL || param->fsp_stop)
174 fld = param->fsp_fld;
176 LASSERT(obj != NULL);
177 iops = &obj->do_index_ops->dio_it;
179 iops->load(¶m->fsp_env, param->fsp_it, *pos);
181 *pos = be64_to_cpu(*(__u64 *)iops->key(¶m->fsp_env, param->fsp_it));
185 static void fldb_seq_stop(struct seq_file *p, void *v)
187 struct fld_seq_param *param = p->private;
188 const struct dt_it_ops *iops;
189 struct lu_server_fld *fld;
190 struct dt_object *obj;
195 fld = param->fsp_fld;
197 LASSERT(obj != NULL);
198 iops = &obj->do_index_ops->dio_it;
200 iops->put(¶m->fsp_env, param->fsp_it);
203 static void *fldb_seq_next(struct seq_file *p, void *v, loff_t *pos)
205 struct fld_seq_param *param = p->private;
206 struct lu_server_fld *fld;
207 struct dt_object *obj;
208 const struct dt_it_ops *iops;
211 if (param == NULL || param->fsp_stop)
214 fld = param->fsp_fld;
216 LASSERT(obj != NULL);
217 iops = &obj->do_index_ops->dio_it;
219 rc = iops->next(¶m->fsp_env, param->fsp_it);
225 *pos = be64_to_cpu(*(__u64 *)iops->key(¶m->fsp_env, param->fsp_it));
229 static int fldb_seq_show(struct seq_file *p, void *v)
231 struct fld_seq_param *param = p->private;
232 struct lu_server_fld *fld;
233 struct dt_object *obj;
234 const struct dt_it_ops *iops;
235 struct fld_thread_info *info;
236 struct lu_seq_range *fld_rec;
239 if (param == NULL || param->fsp_stop)
242 fld = param->fsp_fld;
244 LASSERT(obj != NULL);
245 iops = &obj->do_index_ops->dio_it;
247 info = lu_context_key_get(¶m->fsp_env.le_ctx,
249 fld_rec = &info->fti_rec;
250 rc = iops->rec(¶m->fsp_env, param->fsp_it,
251 (struct dt_rec *)fld_rec, 0);
253 CERROR("%s:read record error: rc %d\n",
255 } else if (fld_rec->lsr_start != 0) {
256 range_be_to_cpu(fld_rec, fld_rec);
257 rc = seq_printf(p, DRANGE"\n", PRANGE(fld_rec));
263 struct seq_operations fldb_sops = {
264 .start = fldb_seq_start,
265 .stop = fldb_seq_stop,
266 .next = fldb_seq_next,
267 .show = fldb_seq_show,
270 static int fldb_seq_open(struct inode *inode, struct file *file)
272 struct proc_dir_entry *dp = PDE(inode);
273 struct seq_file *seq;
274 struct lu_server_fld *fld = (struct lu_server_fld *)dp->data;
275 struct dt_object *obj;
276 const struct dt_it_ops *iops;
277 struct fld_seq_param *param = NULL;
281 LPROCFS_ENTRY_AND_CHECK(dp);
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, NULL);
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);
323 static int fldb_seq_release(struct inode *inode, struct file *file)
325 struct seq_file *seq = file->private_data;
326 struct fld_seq_param *param;
327 struct lu_server_fld *fld;
328 struct dt_object *obj;
329 const struct dt_it_ops *iops;
331 param = seq->private;
333 lprocfs_seq_release(inode, file);
337 fld = param->fsp_fld;
339 LASSERT(obj != NULL);
340 iops = &obj->do_index_ops->dio_it;
342 LASSERT(iops != NULL);
343 LASSERT(obj != NULL);
344 LASSERT(param->fsp_it != NULL);
345 iops->fini(¶m->fsp_env, param->fsp_it);
346 lu_env_fini(¶m->fsp_env);
348 lprocfs_seq_release(inode, file);
353 struct lprocfs_vars fld_server_proc_list[] = {
356 struct lprocfs_vars fld_client_proc_list[] = {
357 { "targets", fld_proc_read_targets, NULL, NULL },
358 { "hash", fld_proc_read_hash, fld_proc_write_hash, NULL },
359 { "cache_flush", NULL, fld_proc_write_cache_flush, NULL },
362 struct file_operations fld_proc_seq_fops = {
363 .owner = THIS_MODULE,
364 .open = fldb_seq_open,
366 .release = fldb_seq_release,