diff options
Diffstat (limited to 'drivers/staging/lustre/include/linux/libcfs/params_tree.h')
| -rw-r--r-- | drivers/staging/lustre/include/linux/libcfs/params_tree.h | 166 |
1 files changed, 166 insertions, 0 deletions
diff --git a/drivers/staging/lustre/include/linux/libcfs/params_tree.h b/drivers/staging/lustre/include/linux/libcfs/params_tree.h new file mode 100644 index 000000000000..3f18a4467037 --- /dev/null +++ b/drivers/staging/lustre/include/linux/libcfs/params_tree.h @@ -0,0 +1,166 @@ +/* + * 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) 2009, 2010, Oracle and/or its affiliates. All rights reserved. + * Use is subject to license terms. + * + * Copyright (c) 2012, Intel Corporation. + */ +/* + * This file is part of Lustre, http://www.lustre.org/ + * Lustre is a trademark of Sun Microsystems, Inc. + * + * API and structure definitions for params_tree. + * + * Author: LiuYing <emoly.liu@oracle.com> + */ +#ifndef __PARAMS_TREE_H__ +#define __PARAMS_TREE_H__ + +#include <linux/libcfs/libcfs.h> + +#undef LPROCFS +#if defined(CONFIG_PROC_FS) +# define LPROCFS +#endif + +#ifdef LPROCFS +typedef struct file cfs_param_file_t; +typedef struct inode cfs_inode_t; +typedef struct proc_inode cfs_proc_inode_t; +typedef struct seq_file cfs_seq_file_t; +typedef struct seq_operations cfs_seq_ops_t; +typedef struct file_operations cfs_param_file_ops_t; +typedef module_t *cfs_param_module_t; +typedef struct proc_dir_entry cfs_param_dentry_t; +typedef struct poll_table_struct cfs_poll_table_t; +#define CFS_PARAM_MODULE THIS_MODULE +#define cfs_file_private(file) (file->private_data) +#define cfs_dentry_data(dentry) (dentry->data) +#define cfs_proc_inode_pde(proc_inode) (proc_inode->pde) +#define cfs_proc_inode(proc_inode) (proc_inode->vfs_inode) +#define cfs_seq_read_common seq_read +#define cfs_seq_lseek_common seq_lseek +#define cfs_seq_private(seq) (seq->private) +#define cfs_seq_printf(seq, format, ...) seq_printf(seq, format, \ + ## __VA_ARGS__) +#define cfs_seq_release(inode, file) seq_release(inode, file) +#define cfs_seq_puts(seq, s) seq_puts(seq, s) +#define cfs_seq_putc(seq, s) seq_putc(seq, s) +#define cfs_seq_read(file, buf, count, ppos, rc) (rc = seq_read(file, buf, \ + count, ppos)) +#define cfs_seq_open(file, ops, rc) (rc = seq_open(file, ops)) + +#else /* !LPROCFS */ + +typedef struct cfs_params_file { + void *param_private; + loff_t param_pos; + unsigned int param_flags; +} cfs_param_file_t; + +typedef struct cfs_param_inode { + void *param_private; +} cfs_inode_t; + +typedef struct cfs_param_dentry { + void *param_data; +} cfs_param_dentry_t; + +typedef struct cfs_proc_inode { + cfs_param_dentry_t *param_pde; + cfs_inode_t param_inode; +} cfs_proc_inode_t; + +struct cfs_seq_operations; +typedef struct cfs_seq_file { + char *buf; + size_t size; + size_t from; + size_t count; + loff_t index; + loff_t version; + struct mutex lock; + struct cfs_seq_operations *op; + void *private; +} cfs_seq_file_t; + +typedef struct cfs_seq_operations { + void *(*start) (cfs_seq_file_t *m, loff_t *pos); + void (*stop) (cfs_seq_file_t *m, void *v); + void *(*next) (cfs_seq_file_t *m, void *v, loff_t *pos); + int (*show) (cfs_seq_file_t *m, void *v); +} cfs_seq_ops_t; + +typedef void *cfs_param_module_t; +typedef void *cfs_poll_table_t; + +typedef struct cfs_param_file_ops { + cfs_param_module_t owner; + int (*open) (cfs_inode_t *, struct file *); + loff_t (*llseek)(struct file *, loff_t, int); + int (*release) (cfs_inode_t *, cfs_param_file_t *); + unsigned int (*poll) (struct file *, cfs_poll_table_t *); + ssize_t (*write) (struct file *, const char *, size_t, loff_t *); + ssize_t (*read)(struct file *, char *, size_t, loff_t *); +} cfs_param_file_ops_t; +typedef cfs_param_file_ops_t *cfs_lproc_filep_t; + +static inline cfs_proc_inode_t *FAKE_PROC_I(const cfs_inode_t *inode) +{ + return container_of(inode, cfs_proc_inode_t, param_inode); +} + +#define CFS_PARAM_MODULE NULL +#define cfs_file_private(file) (file->param_private) +#define cfs_dentry_data(dentry) (dentry->param_data) +#define cfs_proc_inode(proc_inode) (proc_inode->param_inode) +#define cfs_proc_inode_pde(proc_inode) (proc_inode->param_pde) +#define cfs_seq_read_common NULL +#define cfs_seq_lseek_common NULL +#define cfs_seq_private(seq) (seq->private) +#define cfs_seq_read(file, buf, count, ppos, rc) do {} while(0) +#define cfs_seq_open(file, ops, rc) \ +do { \ + cfs_seq_file_t *p = cfs_file_private(file); \ + if (!p) { \ + LIBCFS_ALLOC(p, sizeof(*p)); \ + if (!p) { \ + rc = -ENOMEM; \ + break; \ + } \ + cfs_file_private(file) = p; \ + } \ + memset(p, 0, sizeof(*p)); \ + p->op = ops; \ + rc = 0; \ +} while(0) + +#endif /* LPROCFS */ + +/* XXX: params_tree APIs */ + +#endif /* __PARAMS_TREE_H__ */ |