--- /dev/null
+/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
+ * vim:expandtab:shiftwidth=8:tabstop=8:
+ *
+ * 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.
+ */
+/*
+ * 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__
+
+#ifndef EXPORT_SYMTAB
+# define EXPORT_SYMTAB
+#endif
+
+#include <libcfs/libcfs.h>
+
+#undef LPROCFS
+#if (defined(__KERNEL__) && 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 cfs_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_PDE(value) PDE(value)
+#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))
+
+/* in lprocfs_stat.c, to protect the private data for proc entries */
+extern cfs_rw_semaphore_t _lprocfs_lock;
+#define LPROCFS_ENTRY() \
+do { \
+ cfs_down_read(&_lprocfs_lock); \
+} while(0)
+#define LPROCFS_EXIT() \
+do { \
+ cfs_up_read(&_lprocfs_lock); \
+} while(0)
+
+#ifdef HAVE_PROCFS_DELETED
+static inline
+int LPROCFS_ENTRY_AND_CHECK(struct proc_dir_entry *dp)
+{
+ LPROCFS_ENTRY();
+ if ((dp)->deleted) {
+ LPROCFS_EXIT();
+ return -ENODEV;
+ }
+ return 0;
+}
+#else /* !HAVE_PROCFS_DELETED*/
+static inline
+int LPROCFS_ENTRY_AND_CHECK(struct proc_dir_entry *dp)
+{
+ LPROCFS_ENTRY();
+ return 0;
+}
+#endif /* HAVE_PROCFS_DELETED */
+
+#define LPROCFS_WRITE_ENTRY() \
+do { \
+ cfs_down_write(&_lprocfs_lock); \
+} while(0)
+#define LPROCFS_WRITE_EXIT() \
+do { \
+ cfs_up_write(&_lprocfs_lock); \
+} while(0)
+
+#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;
+ cfs_mutex_t 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 *, cfs_file_t *);
+ loff_t (*llseek)(cfs_file_t *, loff_t, int);
+ int (*release) (cfs_inode_t *, cfs_param_file_t *);
+ unsigned int (*poll) (cfs_file_t *, cfs_poll_table_t *);
+ ssize_t (*write) (cfs_file_t *, const char *, size_t, loff_t *);
+ ssize_t (*read)(cfs_file_t *, 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);
+}
+
+static inline cfs_param_dentry_t *FAKE_PDE(cfs_inode_t *inode)
+{
+ return FAKE_PROC_I(inode)->param_pde;
+}
+
+#define CFS_PARAM_MODULE NULL
+#define CFS_PDE(value) FAKE_PDE(value)
+#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)
+
+#define LPROCFS_ENTRY() do {} while(0)
+#define LPROCFS_EXIT() do {} while(0)
+static inline
+int LPROCFS_ENTRY_AND_CHECK(cfs_param_dentry_t *dp)
+{
+ LPROCFS_ENTRY();
+ return 0;
+}
+#define LPROCFS_WRITE_ENTRY() do {} while(0)
+#define LPROCFS_WRITE_EXIT() do {} while(0)
+
+#endif /* LPROCFS */
+
+/* XXX: params_tree APIs */
+
+#endif /* __PARAMS_TREE_H__ */
git://git.whamcloud.com / fs / lustre-release.git / blobdiff