/*
* Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
+ *
+ * Copyright (c) 2012, 2014, Intel Corporation.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
* FLD (FIDs Location Database)
*
* Author: Yury Umanets <umka@clusterfs.com>
+ * Di Wang <di.wang@whamcloud.com>
*/
-#ifndef EXPORT_SYMTAB
-# define EXPORT_SYMTAB
-#endif
#define DEBUG_SUBSYSTEM S_FLD
-#ifdef __KERNEL__
-# include <libcfs/libcfs.h>
-# include <linux/module.h>
-#else /* __KERNEL__ */
-# include <liblustre.h>
-#endif
-
-#include <obd.h>
-#include <obd_class.h>
+#include <libcfs/libcfs.h>
+#include <linux/module.h>
#include <dt_object.h>
-#include <md_object.h>
#include <obd_support.h>
-#include <lustre_req_layout.h>
#include <lustre_fld.h>
+#include <lustre_fid.h>
#include "fld_internal.h"
-#ifdef LPROCFS
+#ifdef CONFIG_PROC_FS
static int
-fld_proc_read_targets(char *page, char **start, off_t off,
- int count, int *eof, void *data)
+fld_proc_targets_seq_show(struct seq_file *m, void *unused)
{
- struct lu_client_fld *fld = (struct lu_client_fld *)data;
+ struct lu_client_fld *fld = (struct lu_client_fld *)m->private;
struct lu_fld_target *target;
- int total = 0, rc;
ENTRY;
- LASSERT(fld != NULL);
+ LASSERT(fld != NULL);
- cfs_spin_lock(&fld->lcf_lock);
- cfs_list_for_each_entry(target,
- &fld->lcf_targets, ft_chain)
- {
- rc = snprintf(page, count, "%s\n",
- fld_target_name(target));
- page += rc;
- count -= rc;
- total += rc;
- if (count == 0)
- break;
- }
- cfs_spin_unlock(&fld->lcf_lock);
- RETURN(total);
+ spin_lock(&fld->lcf_lock);
+ list_for_each_entry(target, &fld->lcf_targets, ft_chain)
+ seq_printf(m, "%s\n", fld_target_name(target));
+ spin_unlock(&fld->lcf_lock);
+ RETURN(0);
}
static int
-fld_proc_read_hash(char *page, char **start, off_t off,
- int count, int *eof, void *data)
+fld_proc_hash_seq_show(struct seq_file *m, void *unused)
{
- struct lu_client_fld *fld = (struct lu_client_fld *)data;
- int rc;
+ struct lu_client_fld *fld = (struct lu_client_fld *)m->private;
ENTRY;
- LASSERT(fld != NULL);
+ LASSERT(fld != NULL);
- cfs_spin_lock(&fld->lcf_lock);
- rc = snprintf(page, count, "%s\n",
- fld->lcf_hash->fh_name);
- cfs_spin_unlock(&fld->lcf_lock);
+ spin_lock(&fld->lcf_lock);
+ seq_printf(m, "%s\n", fld->lcf_hash->fh_name);
+ spin_unlock(&fld->lcf_lock);
- RETURN(rc);
+ RETURN(0);
}
-static int
-fld_proc_write_hash(struct file *file, const char *buffer,
- unsigned long count, void *data)
+static ssize_t
+fld_proc_hash_seq_write(struct file *file, const char __user *buffer,
+ size_t count, loff_t *off)
{
- struct lu_client_fld *fld = (struct lu_client_fld *)data;
+ struct lu_client_fld *fld = ((struct seq_file *)file->private_data)->private;
struct lu_fld_hash *hash = NULL;
int i;
ENTRY;
}
}
- if (hash != NULL) {
- cfs_spin_lock(&fld->lcf_lock);
- fld->lcf_hash = hash;
- cfs_spin_unlock(&fld->lcf_lock);
+ if (hash != NULL) {
+ spin_lock(&fld->lcf_lock);
+ fld->lcf_hash = hash;
+ spin_unlock(&fld->lcf_lock);
- CDEBUG(D_INFO, "%s: Changed hash to \"%s\"\n",
- fld->lcf_name, hash->fh_name);
- }
-
- RETURN(count);
+ CDEBUG(D_INFO, "%s: Changed hash to \"%s\"\n",
+ fld->lcf_name, hash->fh_name);
+ }
+
+ RETURN(count);
}
-static int
-fld_proc_write_cache_flush(struct file *file, const char *buffer,
- unsigned long count, void *data)
+static ssize_t
+lprocfs_cache_flush_seq_write(struct file *file, const char __user *buffer,
+ size_t count, loff_t *pos)
{
- struct lu_client_fld *fld = (struct lu_client_fld *)data;
+ struct lu_client_fld *fld = ((struct seq_file *)file->private_data)->private;
ENTRY;
LASSERT(fld != NULL);
fld_cache_flush(fld->lcf_cache);
CDEBUG(D_INFO, "%s: Lookup cache is flushed\n", fld->lcf_name);
-
+
RETURN(count);
}
-struct lprocfs_vars fld_server_proc_list[] = {
- { NULL }};
+LPROC_SEQ_FOPS_RO(fld_proc_targets);
+LPROC_SEQ_FOPS(fld_proc_hash);
+LPROC_SEQ_FOPS_WO_TYPE(fld, cache_flush);
struct lprocfs_vars fld_client_proc_list[] = {
- { "targets", fld_proc_read_targets, NULL, NULL },
- { "hash", fld_proc_read_hash, fld_proc_write_hash, NULL },
- { "cache_flush", NULL, fld_proc_write_cache_flush, NULL },
- { NULL }};
-#endif
+ { .name = "targets",
+ .fops = &fld_proc_targets_fops },
+ { .name = "hash",
+ .fops = &fld_proc_hash_fops },
+ { .name = "cache_flush",
+ .fops = &fld_cache_flush_fops },
+ { NULL }
+};
+
+#ifdef HAVE_SERVER_SUPPORT
+struct fld_seq_param {
+ struct lu_env fsp_env;
+ struct dt_it *fsp_it;
+ struct lu_server_fld *fsp_fld;
+ unsigned int fsp_stop:1;
+};
+
+static void *fldb_seq_start(struct seq_file *p, loff_t *pos)
+{
+ struct fld_seq_param *param = p->private;
+ struct lu_server_fld *fld;
+ struct dt_object *obj;
+ const struct dt_it_ops *iops;
+ struct dt_key *key;
+ int rc;
+
+ if (param == NULL || param->fsp_stop)
+ return NULL;
+
+ fld = param->fsp_fld;
+ obj = fld->lsf_obj;
+ LASSERT(obj != NULL);
+ iops = &obj->do_index_ops->dio_it;
+
+ rc = iops->load(¶m->fsp_env, param->fsp_it, *pos);
+ if (rc <= 0)
+ return NULL;
+
+ key = iops->key(¶m->fsp_env, param->fsp_it);
+ if (IS_ERR(key))
+ return NULL;
+
+ *pos = be64_to_cpu(*(__u64 *)key);
+
+ return param;
+}
+
+static void fldb_seq_stop(struct seq_file *p, void *v)
+{
+ struct fld_seq_param *param = p->private;
+ const struct dt_it_ops *iops;
+ struct lu_server_fld *fld;
+ struct dt_object *obj;
+
+ if (param == NULL)
+ return;
+
+ fld = param->fsp_fld;
+ obj = fld->lsf_obj;
+ LASSERT(obj != NULL);
+ iops = &obj->do_index_ops->dio_it;
+
+ iops->put(¶m->fsp_env, param->fsp_it);
+}
+
+static void *fldb_seq_next(struct seq_file *p, void *v, loff_t *pos)
+{
+ struct fld_seq_param *param = p->private;
+ struct lu_server_fld *fld;
+ struct dt_object *obj;
+ const struct dt_it_ops *iops;
+ int rc;
+
+ if (param == NULL || param->fsp_stop)
+ return NULL;
+
+ fld = param->fsp_fld;
+ obj = fld->lsf_obj;
+ LASSERT(obj != NULL);
+ iops = &obj->do_index_ops->dio_it;
+
+ rc = iops->next(¶m->fsp_env, param->fsp_it);
+ if (rc > 0) {
+ param->fsp_stop = 1;
+ return NULL;
+ }
+
+ *pos = be64_to_cpu(*(__u64 *)iops->key(¶m->fsp_env, param->fsp_it));
+ return param;
+}
+
+static int fldb_seq_show(struct seq_file *p, void *v)
+{
+ struct fld_seq_param *param = p->private;
+ struct lu_server_fld *fld;
+ struct dt_object *obj;
+ const struct dt_it_ops *iops;
+ struct fld_thread_info *info;
+ struct lu_seq_range *fld_rec;
+ int rc;
+
+ if (param == NULL || param->fsp_stop)
+ return 0;
+
+ fld = param->fsp_fld;
+ obj = fld->lsf_obj;
+ LASSERT(obj != NULL);
+ iops = &obj->do_index_ops->dio_it;
+
+ info = lu_context_key_get(¶m->fsp_env.le_ctx,
+ &fld_thread_key);
+ fld_rec = &info->fti_rec;
+ rc = iops->rec(¶m->fsp_env, param->fsp_it,
+ (struct dt_rec *)fld_rec, 0);
+ if (rc != 0) {
+ CERROR("%s:read record error: rc %d\n",
+ fld->lsf_name, rc);
+ } else if (fld_rec->lsr_start != 0) {
+ range_be_to_cpu(fld_rec, fld_rec);
+ rc = seq_printf(p, DRANGE"\n", PRANGE(fld_rec));
+ }
+
+ return rc;
+}
+
+struct seq_operations fldb_sops = {
+ .start = fldb_seq_start,
+ .stop = fldb_seq_stop,
+ .next = fldb_seq_next,
+ .show = fldb_seq_show,
+};
+
+static int fldb_seq_open(struct inode *inode, struct file *file)
+{
+ struct seq_file *seq;
+ struct lu_server_fld *fld = (struct lu_server_fld *)PDE_DATA(inode);
+ struct dt_object *obj;
+ const struct dt_it_ops *iops;
+ struct fld_seq_param *param = NULL;
+ int env_init = 0;
+ int rc;
+
+ rc = LPROCFS_ENTRY_CHECK(inode);
+ if (rc < 0)
+ return rc;
+
+ rc = seq_open(file, &fldb_sops);
+ if (rc)
+ GOTO(out, rc);
+
+ obj = fld->lsf_obj;
+ if (obj == NULL) {
+ seq = file->private_data;
+ seq->private = NULL;
+ return 0;
+ }
+
+ OBD_ALLOC_PTR(param);
+ if (param == NULL)
+ GOTO(out, rc = -ENOMEM);
+
+ rc = lu_env_init(¶m->fsp_env, LCT_MD_THREAD);
+ if (rc != 0)
+ GOTO(out, rc);
+
+ env_init = 1;
+ iops = &obj->do_index_ops->dio_it;
+ param->fsp_it = iops->init(¶m->fsp_env, obj, 0);
+ if (IS_ERR(param->fsp_it))
+ GOTO(out, rc = PTR_ERR(param->fsp_it));
+
+ param->fsp_fld = fld;
+ param->fsp_stop = 0;
+
+ seq = file->private_data;
+ seq->private = param;
+out:
+ if (rc != 0) {
+ if (env_init == 1)
+ lu_env_fini(¶m->fsp_env);
+ if (param != NULL)
+ OBD_FREE_PTR(param);
+ }
+ return rc;
+}
+
+static int fldb_seq_release(struct inode *inode, struct file *file)
+{
+ struct seq_file *seq = file->private_data;
+ struct fld_seq_param *param;
+ struct lu_server_fld *fld;
+ struct dt_object *obj;
+ const struct dt_it_ops *iops;
+
+ param = seq->private;
+ if (param == NULL) {
+ lprocfs_seq_release(inode, file);
+ return 0;
+ }
+
+ fld = param->fsp_fld;
+ obj = fld->lsf_obj;
+ LASSERT(obj != NULL);
+ iops = &obj->do_index_ops->dio_it;
+
+ LASSERT(iops != NULL);
+ LASSERT(param->fsp_it != NULL);
+ iops->fini(¶m->fsp_env, param->fsp_it);
+ lu_env_fini(¶m->fsp_env);
+ OBD_FREE_PTR(param);
+ lprocfs_seq_release(inode, file);
+
+ return 0;
+}
+
+const struct file_operations fld_proc_seq_fops = {
+ .owner = THIS_MODULE,
+ .open = fldb_seq_open,
+ .read = seq_read,
+ .release = fldb_seq_release,
+};
+
+struct lprocfs_vars fld_server_proc_list[] = {
+ { NULL }
+};
+
+# endif /* HAVE_SERVER_SUPPORT */
+
+#endif /* CONFIG_PROC_FS */
git://git.whamcloud.com / fs / lustre-release.git / blobdiff