diff options
Diffstat (limited to 'drivers/staging/lustre/lustre/fld/lproc_fld.c')
| -rw-r--r-- | drivers/staging/lustre/lustre/fld/lproc_fld.c | 373 |
1 files changed, 373 insertions, 0 deletions
diff --git a/drivers/staging/lustre/lustre/fld/lproc_fld.c b/drivers/staging/lustre/lustre/fld/lproc_fld.c new file mode 100644 index 000000000000..c1bd80339e67 --- /dev/null +++ b/drivers/staging/lustre/lustre/fld/lproc_fld.c @@ -0,0 +1,373 @@ +/* + * GPL HEADER START + * + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 only, + * as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License version 2 for more details (a copy is included + * in the LICENSE file that accompanied this code). + * + * You should have received a copy of the GNU General Public License + * version 2 along with this program; If not, see + * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf + * + * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, + * CA 95054 USA or visit www.sun.com if you need additional information or + * have any questions. + * + * GPL HEADER END + */ +/* + * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved. + * Use is subject to license terms. + * + * Copyright (c) 2012, 2013, Intel Corporation. + */ +/* + * This file is part of Lustre, http://www.lustre.org/ + * Lustre is a trademark of Sun Microsystems, Inc. + * + * lustre/fld/lproc_fld.c + * + * FLD (FIDs Location Database) + * + * Author: Yury Umanets <umka@clusterfs.com> + * Di Wang <di.wang@whamcloud.com> + */ + +#define DEBUG_SUBSYSTEM S_FLD + +# include <linux/libcfs/libcfs.h> +# include <linux/module.h> + +#include <obd.h> +#include <obd_class.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 +static int +fld_proc_targets_seq_show(struct seq_file *m, void *unused) +{ + struct lu_client_fld *fld = (struct lu_client_fld *)m->private; + struct lu_fld_target *target; + ENTRY; + + LASSERT(fld != NULL); + + 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_hash_seq_show(struct seq_file *m, void *unused) +{ + struct lu_client_fld *fld = (struct lu_client_fld *)m->private; + ENTRY; + + LASSERT(fld != NULL); + + spin_lock(&fld->lcf_lock); + seq_printf(m, "%s\n", fld->lcf_hash->fh_name); + spin_unlock(&fld->lcf_lock); + + RETURN(0); +} + +static ssize_t +fld_proc_hash_seq_write(struct file *file, const char *buffer, + size_t count, loff_t *off) +{ + struct lu_client_fld *fld = ((struct seq_file *)file->private_data)->private; + struct lu_fld_hash *hash = NULL; + int i; + ENTRY; + + LASSERT(fld != NULL); + + for (i = 0; fld_hash[i].fh_name != NULL; i++) { + if (count != strlen(fld_hash[i].fh_name)) + continue; + + if (!strncmp(fld_hash[i].fh_name, buffer, count)) { + hash = &fld_hash[i]; + break; + } + } + + 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); +} + +static ssize_t +fld_proc_cache_flush_write(struct file *file, const char __user *buffer, + size_t count, loff_t *pos) +{ + struct lu_client_fld *fld = file->private_data; + ENTRY; + + LASSERT(fld != NULL); + + fld_cache_flush(fld->lcf_cache); + + CDEBUG(D_INFO, "%s: Lookup cache is flushed\n", fld->lcf_name); + + RETURN(count); +} + +static int fld_proc_cache_flush_open(struct inode *inode, struct file *file) +{ + file->private_data = PDE_DATA(inode); + return 0; +} + +static int fld_proc_cache_flush_release(struct inode *inode, struct file *file) +{ + file->private_data = NULL; + return 0; +} + +struct file_operations fld_proc_cache_flush_fops = { + .owner = THIS_MODULE, + .open = fld_proc_cache_flush_open, + .write = fld_proc_cache_flush_write, + .release = fld_proc_cache_flush_release, +}; + +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; + + 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; + + iops->load(¶m->fsp_env, param->fsp_it, *pos); + + *pos = be64_to_cpu(*(__u64 *)iops->key(¶m->fsp_env, param->fsp_it)); + 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 = 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, NULL); + 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(obj != 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; +} + +struct lprocfs_vars fld_server_proc_list[] = { + { NULL }}; + +LPROC_SEQ_FOPS_RO(fld_proc_targets); +LPROC_SEQ_FOPS(fld_proc_hash); + +struct lprocfs_vars fld_client_proc_list[] = { + { "targets", &fld_proc_targets_fops }, + { "hash", &fld_proc_hash_fops }, + { "cache_flush", &fld_proc_cache_flush_fops }, + { NULL }}; + +struct file_operations fld_proc_seq_fops = { + .owner = THIS_MODULE, + .open = fldb_seq_open, + .read = seq_read, + .release = fldb_seq_release, +}; + +#endif |