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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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27 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
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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>
53 #include <dt_object.h>
54 #include <obd_support.h>
55 #include <lustre_fld.h>
56 #include <lustre_fid.h>
57 #include "fld_internal.h"
58 #include <md_object.h>
62 fld_proc_targets_seq_show(struct seq_file *m, void *unused)
64 struct lu_client_fld *fld = (struct lu_client_fld *)m->private;
65 struct lu_fld_target *target;
70 spin_lock(&fld->lcf_lock);
71 list_for_each_entry(target, &fld->lcf_targets, ft_chain)
72 seq_printf(m, "%s\n", fld_target_name(target));
73 spin_unlock(&fld->lcf_lock);
78 fld_proc_hash_seq_show(struct seq_file *m, void *unused)
80 struct lu_client_fld *fld = (struct lu_client_fld *)m->private;
85 spin_lock(&fld->lcf_lock);
86 seq_printf(m, "%s\n", fld->lcf_hash->fh_name);
87 spin_unlock(&fld->lcf_lock);
93 fld_proc_hash_seq_write(struct file *file, const char *buffer,
94 size_t count, loff_t *off)
96 struct lu_client_fld *fld = ((struct seq_file *)file->private_data)->private;
97 struct lu_fld_hash *hash = NULL;
101 LASSERT(fld != NULL);
103 for (i = 0; fld_hash[i].fh_name != NULL; i++) {
104 if (count != strlen(fld_hash[i].fh_name))
107 if (!strncmp(fld_hash[i].fh_name, buffer, count)) {
114 spin_lock(&fld->lcf_lock);
115 fld->lcf_hash = hash;
116 spin_unlock(&fld->lcf_lock);
118 CDEBUG(D_INFO, "%s: Changed hash to \"%s\"\n",
119 fld->lcf_name, hash->fh_name);
126 lprocfs_cache_flush_seq_write(struct file *file, const char *buffer,
127 size_t count, loff_t *pos)
129 struct lu_client_fld *fld = ((struct seq_file *)file->private_data)->private;
132 LASSERT(fld != NULL);
134 fld_cache_flush(fld->lcf_cache);
136 CDEBUG(D_INFO, "%s: Lookup cache is flushed\n", fld->lcf_name);
141 LPROC_SEQ_FOPS_RO(fld_proc_targets);
142 LPROC_SEQ_FOPS(fld_proc_hash);
143 LPROC_SEQ_FOPS_WO_TYPE(fld, cache_flush);
145 struct lprocfs_seq_vars fld_client_proc_list[] = {
147 .fops = &fld_proc_targets_fops },
149 .fops = &fld_proc_hash_fops },
150 { .name = "cache_flush",
151 .fops = &fld_cache_flush_fops },
155 #ifdef HAVE_SERVER_SUPPORT
156 struct fld_seq_param {
157 struct lu_env fsp_env;
158 struct dt_it *fsp_it;
159 struct lu_server_fld *fsp_fld;
160 unsigned int fsp_stop:1;
163 static void *fldb_seq_start(struct seq_file *p, loff_t *pos)
165 struct fld_seq_param *param = p->private;
166 struct lu_server_fld *fld;
167 struct dt_object *obj;
168 const struct dt_it_ops *iops;
172 if (param == NULL || param->fsp_stop)
175 fld = param->fsp_fld;
177 LASSERT(obj != NULL);
178 iops = &obj->do_index_ops->dio_it;
180 rc = iops->load(¶m->fsp_env, param->fsp_it, *pos);
184 key = iops->key(¶m->fsp_env, param->fsp_it);
188 *pos = be64_to_cpu(*(__u64 *)key);
193 static void fldb_seq_stop(struct seq_file *p, void *v)
195 struct fld_seq_param *param = p->private;
196 const struct dt_it_ops *iops;
197 struct lu_server_fld *fld;
198 struct dt_object *obj;
203 fld = param->fsp_fld;
205 LASSERT(obj != NULL);
206 iops = &obj->do_index_ops->dio_it;
208 iops->put(¶m->fsp_env, param->fsp_it);
211 static void *fldb_seq_next(struct seq_file *p, void *v, loff_t *pos)
213 struct fld_seq_param *param = p->private;
214 struct lu_server_fld *fld;
215 struct dt_object *obj;
216 const struct dt_it_ops *iops;
219 if (param == NULL || param->fsp_stop)
222 fld = param->fsp_fld;
224 LASSERT(obj != NULL);
225 iops = &obj->do_index_ops->dio_it;
227 rc = iops->next(¶m->fsp_env, param->fsp_it);
233 *pos = be64_to_cpu(*(__u64 *)iops->key(¶m->fsp_env, param->fsp_it));
237 static int fldb_seq_show(struct seq_file *p, void *v)
239 struct fld_seq_param *param = p->private;
240 struct lu_server_fld *fld;
241 struct dt_object *obj;
242 const struct dt_it_ops *iops;
243 struct fld_thread_info *info;
244 struct lu_seq_range *fld_rec;
247 if (param == NULL || param->fsp_stop)
250 fld = param->fsp_fld;
252 LASSERT(obj != NULL);
253 iops = &obj->do_index_ops->dio_it;
255 info = lu_context_key_get(¶m->fsp_env.le_ctx,
257 fld_rec = &info->fti_rec;
258 rc = iops->rec(¶m->fsp_env, param->fsp_it,
259 (struct dt_rec *)fld_rec, 0);
261 CERROR("%s:read record error: rc %d\n",
263 } else if (fld_rec->lsr_start != 0) {
264 range_be_to_cpu(fld_rec, fld_rec);
265 rc = seq_printf(p, DRANGE"\n", PRANGE(fld_rec));
271 struct seq_operations fldb_sops = {
272 .start = fldb_seq_start,
273 .stop = fldb_seq_stop,
274 .next = fldb_seq_next,
275 .show = fldb_seq_show,
278 static int fldb_seq_open(struct inode *inode, struct file *file)
280 struct seq_file *seq;
281 struct lu_server_fld *fld = (struct lu_server_fld *)PDE_DATA(inode);
282 struct dt_object *obj;
283 const struct dt_it_ops *iops;
284 struct fld_seq_param *param = NULL;
288 LPROCFS_ENTRY_CHECK(PDE(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, NULL);
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_seq_vars fld_server_proc_list[] = {
369 # endif /* HAVE_SERVER_SUPPORT */