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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
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"
56 fld_proc_targets_seq_show(struct seq_file *m, void *unused)
58 struct lu_client_fld *fld = (struct lu_client_fld *)m->private;
59 struct lu_fld_target *target;
64 spin_lock(&fld->lcf_lock);
65 list_for_each_entry(target, &fld->lcf_targets, ft_chain)
66 seq_printf(m, "%s\n", fld_target_name(target));
67 spin_unlock(&fld->lcf_lock);
72 fld_proc_hash_seq_show(struct seq_file *m, void *unused)
74 struct lu_client_fld *fld = (struct lu_client_fld *)m->private;
79 spin_lock(&fld->lcf_lock);
80 seq_printf(m, "%s\n", fld->lcf_hash->fh_name);
81 spin_unlock(&fld->lcf_lock);
87 fld_proc_hash_seq_write(struct file *file, const char __user *buffer,
88 size_t count, loff_t *off)
90 struct lu_client_fld *fld;
91 struct lu_fld_hash *hash = NULL;
95 if (count > sizeof(fh_name))
98 if (copy_from_user(fh_name, buffer, count) != 0)
101 fld = ((struct seq_file *)file->private_data)->private;
102 LASSERT(fld != NULL);
104 for (i = 0; fld_hash[i].fh_name != NULL; i++) {
105 if (count != strlen(fld_hash[i].fh_name))
108 if (!strncmp(fld_hash[i].fh_name, fh_name, count)) {
115 spin_lock(&fld->lcf_lock);
116 fld->lcf_hash = hash;
117 spin_unlock(&fld->lcf_lock);
119 CDEBUG(D_INFO, "%s: Changed hash to \"%s\"\n",
120 fld->lcf_name, hash->fh_name);
127 lprocfs_cache_flush_seq_write(struct file *file, const char __user *buffer,
128 size_t count, loff_t *pos)
130 struct lu_client_fld *fld = ((struct seq_file *)file->private_data)->private;
133 LASSERT(fld != NULL);
135 fld_cache_flush(fld->lcf_cache);
137 CDEBUG(D_INFO, "%s: Lookup cache is flushed\n", fld->lcf_name);
142 LPROC_SEQ_FOPS_RO(fld_proc_targets);
143 LPROC_SEQ_FOPS(fld_proc_hash);
144 LPROC_SEQ_FOPS_WO_TYPE(fld, cache_flush);
146 struct lprocfs_vars fld_client_proc_list[] = {
148 .fops = &fld_proc_targets_fops },
150 .fops = &fld_proc_hash_fops },
151 { .name = "cache_flush",
152 .fops = &fld_cache_flush_fops },
156 #ifdef HAVE_SERVER_SUPPORT
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;
173 if (param == NULL || param->fsp_stop)
176 fld = param->fsp_fld;
178 LASSERT(obj != NULL);
179 iops = &obj->do_index_ops->dio_it;
181 rc = iops->load(¶m->fsp_env, param->fsp_it, *pos);
185 key = iops->key(¶m->fsp_env, param->fsp_it);
189 *pos = be64_to_cpu(*(__u64 *)key);
194 static void fldb_seq_stop(struct seq_file *p, void *v)
196 struct fld_seq_param *param = p->private;
197 const struct dt_it_ops *iops;
198 struct lu_server_fld *fld;
199 struct dt_object *obj;
204 fld = param->fsp_fld;
206 LASSERT(obj != NULL);
207 iops = &obj->do_index_ops->dio_it;
209 iops->put(¶m->fsp_env, param->fsp_it);
212 static void *fldb_seq_next(struct seq_file *p, void *v, loff_t *pos)
214 struct fld_seq_param *param = p->private;
215 struct lu_server_fld *fld;
216 struct dt_object *obj;
217 const struct dt_it_ops *iops;
220 if (param == NULL || param->fsp_stop)
223 fld = param->fsp_fld;
225 LASSERT(obj != NULL);
226 iops = &obj->do_index_ops->dio_it;
228 rc = iops->next(¶m->fsp_env, param->fsp_it);
234 *pos = be64_to_cpu(*(__u64 *)iops->key(¶m->fsp_env, param->fsp_it));
238 static int fldb_seq_show(struct seq_file *p, void *v)
240 struct fld_seq_param *param = p->private;
241 struct lu_server_fld *fld;
242 struct dt_object *obj;
243 const struct dt_it_ops *iops;
244 struct fld_thread_info *info;
245 struct lu_seq_range *fld_rec;
248 if (param == NULL || param->fsp_stop)
251 fld = param->fsp_fld;
253 LASSERT(obj != NULL);
254 iops = &obj->do_index_ops->dio_it;
256 info = lu_context_key_get(¶m->fsp_env.le_ctx,
258 fld_rec = &info->fti_rec;
259 rc = iops->rec(¶m->fsp_env, param->fsp_it,
260 (struct dt_rec *)fld_rec, 0);
262 CERROR("%s:read record error: rc %d\n",
264 } else if (fld_rec->lsr_start != 0) {
265 range_be_to_cpu(fld_rec, fld_rec);
266 rc = seq_printf(p, DRANGE"\n", PRANGE(fld_rec));
272 struct seq_operations fldb_sops = {
273 .start = fldb_seq_start,
274 .stop = fldb_seq_stop,
275 .next = fldb_seq_next,
276 .show = fldb_seq_show,
279 static int fldb_seq_open(struct inode *inode, struct file *file)
281 struct seq_file *seq;
282 struct lu_server_fld *fld = (struct lu_server_fld *)PDE_DATA(inode);
283 struct dt_object *obj;
284 const struct dt_it_ops *iops;
285 struct fld_seq_param *param = NULL;
289 rc = LPROCFS_ENTRY_CHECK(inode);
293 rc = seq_open(file, &fldb_sops);
299 seq = file->private_data;
304 OBD_ALLOC_PTR(param);
306 GOTO(out, rc = -ENOMEM);
308 rc = lu_env_init(¶m->fsp_env, LCT_MD_THREAD);
313 iops = &obj->do_index_ops->dio_it;
314 param->fsp_it = iops->init(¶m->fsp_env, obj, 0);
315 if (IS_ERR(param->fsp_it))
316 GOTO(out, rc = PTR_ERR(param->fsp_it));
318 param->fsp_fld = fld;
321 seq = file->private_data;
322 seq->private = param;
326 lu_env_fini(¶m->fsp_env);
333 static int fldb_seq_release(struct inode *inode, struct file *file)
335 struct seq_file *seq = file->private_data;
336 struct fld_seq_param *param;
337 struct lu_server_fld *fld;
338 struct dt_object *obj;
339 const struct dt_it_ops *iops;
341 param = seq->private;
343 lprocfs_seq_release(inode, file);
347 fld = param->fsp_fld;
349 LASSERT(obj != NULL);
350 iops = &obj->do_index_ops->dio_it;
352 LASSERT(iops != NULL);
353 LASSERT(param->fsp_it != NULL);
354 iops->fini(¶m->fsp_env, param->fsp_it);
355 lu_env_fini(¶m->fsp_env);
357 lprocfs_seq_release(inode, file);
362 const struct file_operations fld_proc_seq_fops = {
363 .owner = THIS_MODULE,
364 .open = fldb_seq_open,
366 .release = fldb_seq_release,
369 struct lprocfs_vars fld_server_proc_list[] = {
373 # endif /* HAVE_SERVER_SUPPORT */
375 #endif /* CONFIG_PROC_FS */