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27 * Copyright (c) 2009, 2010, Oracle and/or its affiliates. All rights reserved.
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30 * Copyright (c) 2012, Intel Corporation.
33 * This file is part of Lustre, http://www.lustre.org/
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36 * API and structure definitions for params_tree.
38 * Author: LiuYing <emoly.liu@oracle.com>
40 #ifndef __PARAMS_TREE_H__
41 #define __PARAMS_TREE_H__
43 #include <libcfs/libcfs.h>
46 #if (defined(__KERNEL__) && defined(CONFIG_PROC_FS))
51 typedef struct file cfs_param_file_t;
52 typedef struct inode cfs_inode_t;
53 typedef struct proc_inode cfs_proc_inode_t;
54 typedef struct seq_file cfs_seq_file_t;
55 typedef struct seq_operations cfs_seq_ops_t;
56 typedef struct file_operations cfs_param_file_ops_t;
57 typedef cfs_module_t *cfs_param_module_t;
58 typedef struct proc_dir_entry cfs_param_dentry_t;
59 typedef struct poll_table_struct cfs_poll_table_t;
60 #define CFS_PARAM_MODULE THIS_MODULE
61 #define CFS_PDE(value) PDE(value)
62 #define cfs_file_private(file) (file->private_data)
63 #define cfs_dentry_data(dentry) (dentry->data)
64 #define cfs_proc_inode_pde(proc_inode) (proc_inode->pde)
65 #define cfs_proc_inode(proc_inode) (proc_inode->vfs_inode)
66 #define cfs_seq_read_common seq_read
67 #define cfs_seq_lseek_common seq_lseek
68 #define cfs_seq_private(seq) (seq->private)
69 #define cfs_seq_printf(seq, format, ...) seq_printf(seq, format, \
71 #define cfs_seq_release(inode, file) seq_release(inode, file)
72 #define cfs_seq_puts(seq, s) seq_puts(seq, s)
73 #define cfs_seq_putc(seq, s) seq_putc(seq, s)
74 #define cfs_seq_read(file, buf, count, ppos, rc) (rc = seq_read(file, buf, \
76 #define cfs_seq_open(file, ops, rc) (rc = seq_open(file, ops))
78 /* in lprocfs_stat.c, to protect the private data for proc entries */
79 extern struct rw_semaphore _lprocfs_lock;
82 int LPROCFS_ENTRY_CHECK(struct proc_dir_entry *dp)
86 spin_lock(&(dp)->pde_unload_lock);
87 if (dp->proc_fops == NULL)
89 spin_unlock(&(dp)->pde_unload_lock);
94 #define LPROCFS_SRCH_ENTRY() \
96 down_read(&_lprocfs_lock); \
99 #define LPROCFS_SRCH_EXIT() \
101 up_read(&_lprocfs_lock); \
104 #define LPROCFS_WRITE_ENTRY() \
106 down_write(&_lprocfs_lock); \
109 #define LPROCFS_WRITE_EXIT() \
111 up_write(&_lprocfs_lock); \
115 typedef struct cfs_params_file {
118 unsigned int param_flags;
121 typedef struct cfs_param_inode {
125 typedef struct cfs_param_dentry {
127 } cfs_param_dentry_t;
129 typedef struct cfs_proc_inode {
130 cfs_param_dentry_t *param_pde;
131 cfs_inode_t param_inode;
134 struct cfs_seq_operations;
135 typedef struct cfs_seq_file {
143 struct cfs_seq_operations *op;
147 typedef struct cfs_seq_operations {
148 void *(*start) (cfs_seq_file_t *m, loff_t *pos);
149 void (*stop) (cfs_seq_file_t *m, void *v);
150 void *(*next) (cfs_seq_file_t *m, void *v, loff_t *pos);
151 int (*show) (cfs_seq_file_t *m, void *v);
154 typedef void *cfs_param_module_t;
155 typedef void *cfs_poll_table_t;
157 typedef struct cfs_param_file_ops {
158 cfs_param_module_t owner;
159 int (*open) (cfs_inode_t *, struct file *);
160 loff_t (*llseek)(struct file *, loff_t, int);
161 int (*release) (cfs_inode_t *, cfs_param_file_t *);
162 unsigned int (*poll) (struct file *, cfs_poll_table_t *);
163 ssize_t (*write) (struct file *, const char *, size_t, loff_t *);
164 ssize_t (*read)(struct file *, char *, size_t, loff_t *);
165 } cfs_param_file_ops_t;
166 typedef cfs_param_file_ops_t *cfs_lproc_filep_t;
168 static inline cfs_proc_inode_t *FAKE_PROC_I(const cfs_inode_t *inode)
170 return container_of(inode, cfs_proc_inode_t, param_inode);
173 static inline cfs_param_dentry_t *FAKE_PDE(cfs_inode_t *inode)
175 return FAKE_PROC_I(inode)->param_pde;
178 #define CFS_PARAM_MODULE NULL
179 #define CFS_PDE(value) FAKE_PDE(value)
180 #define cfs_file_private(file) (file->param_private)
181 #define cfs_dentry_data(dentry) (dentry->param_data)
182 #define cfs_proc_inode(proc_inode) (proc_inode->param_inode)
183 #define cfs_proc_inode_pde(proc_inode) (proc_inode->param_pde)
184 #define cfs_seq_read_common NULL
185 #define cfs_seq_lseek_common NULL
186 #define cfs_seq_private(seq) (seq->private)
187 #define cfs_seq_read(file, buf, count, ppos, rc) do {} while(0)
188 #define cfs_seq_open(file, ops, rc) \
190 cfs_seq_file_t *p = cfs_file_private(file); \
192 LIBCFS_ALLOC(p, sizeof(*p)); \
197 cfs_file_private(file) = p; \
199 memset(p, 0, sizeof(*p)); \
205 int LPROCFS_ENTRY_CHECK(cfs_param_dentry_t *dp)
209 #define LPROCFS_WRITE_ENTRY() do {} while(0)
210 #define LPROCFS_WRITE_EXIT() do {} while(0)
214 /* XXX: params_tree APIs */
216 #endif /* __PARAMS_TREE_H__ */