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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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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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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
46 #include <libcfs/libcfs.h>
47 #include <linux/module.h>
48 #include <dt_object.h>
49 #include <obd_support.h>
50 #include <lustre_fld.h>
51 #include <lustre_fid.h>
52 #include "fld_internal.h"
53 #include <md_object.h>
57 fld_proc_targets_seq_show(struct seq_file *m, void *unused)
59 struct lu_client_fld *fld = (struct lu_client_fld *)m->private;
60 struct lu_fld_target *target;
65 spin_lock(&fld->lcf_lock);
66 list_for_each_entry(target, &fld->lcf_targets, ft_chain)
67 seq_printf(m, "%s\n", fld_target_name(target));
68 spin_unlock(&fld->lcf_lock);
73 fld_proc_hash_seq_show(struct seq_file *m, void *unused)
75 struct lu_client_fld *fld = (struct lu_client_fld *)m->private;
80 spin_lock(&fld->lcf_lock);
81 seq_printf(m, "%s\n", fld->lcf_hash->fh_name);
82 spin_unlock(&fld->lcf_lock);
88 fld_proc_hash_seq_write(struct file *file, const char *buffer,
89 size_t count, loff_t *off)
91 struct lu_client_fld *fld = ((struct seq_file *)file->private_data)->private;
92 struct lu_fld_hash *hash = NULL;
98 for (i = 0; fld_hash[i].fh_name != NULL; i++) {
99 if (count != strlen(fld_hash[i].fh_name))
102 if (!strncmp(fld_hash[i].fh_name, buffer, 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);
121 lprocfs_cache_flush_seq_write(struct file *file, const char *buffer,
122 size_t count, loff_t *pos)
124 struct lu_client_fld *fld = ((struct seq_file *)file->private_data)->private;
127 LASSERT(fld != NULL);
129 fld_cache_flush(fld->lcf_cache);
131 CDEBUG(D_INFO, "%s: Lookup cache is flushed\n", fld->lcf_name);
136 LPROC_SEQ_FOPS_RO(fld_proc_targets);
137 LPROC_SEQ_FOPS(fld_proc_hash);
138 LPROC_SEQ_FOPS_WO_TYPE(fld, cache_flush);
140 struct lprocfs_seq_vars fld_client_proc_list[] = {
142 .fops = &fld_proc_targets_fops },
144 .fops = &fld_proc_hash_fops },
145 { .name = "cache_flush",
146 .fops = &fld_cache_flush_fops },
150 #ifdef HAVE_SERVER_SUPPORT
151 struct fld_seq_param {
152 struct lu_env fsp_env;
153 struct dt_it *fsp_it;
154 struct lu_server_fld *fsp_fld;
155 unsigned int fsp_stop:1;
158 static void *fldb_seq_start(struct seq_file *p, loff_t *pos)
160 struct fld_seq_param *param = p->private;
161 struct lu_server_fld *fld;
162 struct dt_object *obj;
163 const struct dt_it_ops *iops;
167 if (param == NULL || param->fsp_stop)
170 fld = param->fsp_fld;
172 LASSERT(obj != NULL);
173 iops = &obj->do_index_ops->dio_it;
175 rc = iops->load(¶m->fsp_env, param->fsp_it, *pos);
179 key = iops->key(¶m->fsp_env, param->fsp_it);
183 *pos = be64_to_cpu(*(__u64 *)key);
188 static void fldb_seq_stop(struct seq_file *p, void *v)
190 struct fld_seq_param *param = p->private;
191 const struct dt_it_ops *iops;
192 struct lu_server_fld *fld;
193 struct dt_object *obj;
198 fld = param->fsp_fld;
200 LASSERT(obj != NULL);
201 iops = &obj->do_index_ops->dio_it;
203 iops->put(¶m->fsp_env, param->fsp_it);
206 static void *fldb_seq_next(struct seq_file *p, void *v, loff_t *pos)
208 struct fld_seq_param *param = p->private;
209 struct lu_server_fld *fld;
210 struct dt_object *obj;
211 const struct dt_it_ops *iops;
214 if (param == NULL || param->fsp_stop)
217 fld = param->fsp_fld;
219 LASSERT(obj != NULL);
220 iops = &obj->do_index_ops->dio_it;
222 rc = iops->next(¶m->fsp_env, param->fsp_it);
228 *pos = be64_to_cpu(*(__u64 *)iops->key(¶m->fsp_env, param->fsp_it));
232 static int fldb_seq_show(struct seq_file *p, void *v)
234 struct fld_seq_param *param = p->private;
235 struct lu_server_fld *fld;
236 struct dt_object *obj;
237 const struct dt_it_ops *iops;
238 struct fld_thread_info *info;
239 struct lu_seq_range *fld_rec;
242 if (param == NULL || param->fsp_stop)
245 fld = param->fsp_fld;
247 LASSERT(obj != NULL);
248 iops = &obj->do_index_ops->dio_it;
250 info = lu_context_key_get(¶m->fsp_env.le_ctx,
252 fld_rec = &info->fti_rec;
253 rc = iops->rec(¶m->fsp_env, param->fsp_it,
254 (struct dt_rec *)fld_rec, 0);
256 CERROR("%s:read record error: rc %d\n",
258 } else if (fld_rec->lsr_start != 0) {
259 range_be_to_cpu(fld_rec, fld_rec);
260 rc = seq_printf(p, DRANGE"\n", PRANGE(fld_rec));
266 struct seq_operations fldb_sops = {
267 .start = fldb_seq_start,
268 .stop = fldb_seq_stop,
269 .next = fldb_seq_next,
270 .show = fldb_seq_show,
273 static int fldb_seq_open(struct inode *inode, struct file *file)
275 struct seq_file *seq;
276 struct lu_server_fld *fld = (struct lu_server_fld *)PDE_DATA(inode);
277 struct dt_object *obj;
278 const struct dt_it_ops *iops;
279 struct fld_seq_param *param = NULL;
283 LPROCFS_ENTRY_CHECK(PDE(inode));
284 rc = seq_open(file, &fldb_sops);
290 seq = file->private_data;
295 OBD_ALLOC_PTR(param);
297 GOTO(out, rc = -ENOMEM);
299 rc = lu_env_init(¶m->fsp_env, LCT_MD_THREAD);
304 iops = &obj->do_index_ops->dio_it;
305 param->fsp_it = iops->init(¶m->fsp_env, obj, 0, NULL);
306 if (IS_ERR(param->fsp_it))
307 GOTO(out, rc = PTR_ERR(param->fsp_it));
309 param->fsp_fld = fld;
312 seq = file->private_data;
313 seq->private = param;
317 lu_env_fini(¶m->fsp_env);
324 static int fldb_seq_release(struct inode *inode, struct file *file)
326 struct seq_file *seq = file->private_data;
327 struct fld_seq_param *param;
328 struct lu_server_fld *fld;
329 struct dt_object *obj;
330 const struct dt_it_ops *iops;
332 param = seq->private;
334 lprocfs_seq_release(inode, file);
338 fld = param->fsp_fld;
340 LASSERT(obj != NULL);
341 iops = &obj->do_index_ops->dio_it;
343 LASSERT(iops != 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 const struct file_operations fld_proc_seq_fops = {
354 .owner = THIS_MODULE,
355 .open = fldb_seq_open,
357 .release = fldb_seq_release,
360 struct lprocfs_seq_vars fld_server_proc_list[] = {
364 # endif /* HAVE_SERVER_SUPPORT */