1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
|
/*
* Copyright (C) 2005, 2006
* Avishay Traeger (avishay@gmail.com)
* Copyright (C) 2008, 2009
* Boaz Harrosh <bharrosh@panasas.com>
*
* Copyrights for code taken from ext2:
* Copyright (C) 1992, 1993, 1994, 1995
* Remy Card (card@masi.ibp.fr)
* Laboratoire MASI - Institut Blaise Pascal
* Universite Pierre et Marie Curie (Paris VI)
* from
* linux/fs/minix/inode.c
* Copyright (C) 1991, 1992 Linus Torvalds
*
* This file is part of exofs.
*
* exofs is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation. Since it is based on ext2, and the only
* valid version of GPL for the Linux kernel is version 2, the only valid
* version of GPL for exofs is version 2.
*
* exofs 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 for more details.
*
* You should have received a copy of the GNU General Public License
* along with exofs; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <linux/fs.h>
#include <linux/time.h>
#include "common.h"
#ifndef __EXOFS_H__
#define __EXOFS_H__
#define EXOFS_ERR(fmt, a...) printk(KERN_ERR "exofs: " fmt, ##a)
#ifdef CONFIG_EXOFS_DEBUG
#define EXOFS_DBGMSG(fmt, a...) \
printk(KERN_NOTICE "exofs @%s:%d: " fmt, __func__, __LINE__, ##a)
#else
#define EXOFS_DBGMSG(fmt, a...) \
do { if (0) printk(fmt, ##a); } while (0)
#endif
/* u64 has problems with printk this will cast it to unsigned long long */
#define _LLU(x) (unsigned long long)(x)
/*
* our extension to the in-memory superblock
*/
struct exofs_sb_info {
struct osd_dev *s_dev; /* returned by get_osd_dev */
osd_id s_pid; /* partition ID of file system*/
int s_timeout; /* timeout for OSD operations */
uint64_t s_nextid; /* highest object ID used */
uint32_t s_numfiles; /* number of files on fs */
spinlock_t s_next_gen_lock; /* spinlock for gen # update */
u32 s_next_generation; /* next gen # to use */
atomic_t s_curr_pending; /* number of pending commands */
uint8_t s_cred[OSD_CAP_LEN]; /* all-powerful credential */
};
/*
* our extension to the in-memory inode
*/
struct exofs_i_info {
unsigned long i_flags; /* various atomic flags */
uint32_t i_data[EXOFS_IDATA];/*short symlink names and device #s*/
uint32_t i_dir_start_lookup; /* which page to start lookup */
wait_queue_head_t i_wq; /* wait queue for inode */
uint64_t i_commit_size; /* the object's written length */
uint8_t i_cred[OSD_CAP_LEN];/* all-powerful credential */
struct inode vfs_inode; /* normal in-memory inode */
};
/*
* our inode flags
*/
#define OBJ_2BCREATED 0 /* object will be created soon*/
#define OBJ_CREATED 1 /* object has been created on the osd*/
static inline int obj_2bcreated(struct exofs_i_info *oi)
{
return test_bit(OBJ_2BCREATED, &oi->i_flags);
}
static inline void set_obj_2bcreated(struct exofs_i_info *oi)
{
set_bit(OBJ_2BCREATED, &oi->i_flags);
}
static inline int obj_created(struct exofs_i_info *oi)
{
return test_bit(OBJ_CREATED, &oi->i_flags);
}
static inline void set_obj_created(struct exofs_i_info *oi)
{
set_bit(OBJ_CREATED, &oi->i_flags);
}
int __exofs_wait_obj_created(struct exofs_i_info *oi);
static inline int wait_obj_created(struct exofs_i_info *oi)
{
if (likely(obj_created(oi)))
return 0;
return __exofs_wait_obj_created(oi);
}
/*
* get to our inode from the vfs inode
*/
static inline struct exofs_i_info *exofs_i(struct inode *inode)
{
return container_of(inode, struct exofs_i_info, vfs_inode);
}
/*
* Maximum count of links to a file
*/
#define EXOFS_LINK_MAX 32000
/*************************
* function declarations *
*************************/
/* inode.c */
void exofs_truncate(struct inode *inode);
int exofs_setattr(struct dentry *, struct iattr *);
int exofs_write_begin(struct file *file, struct address_space *mapping,
loff_t pos, unsigned len, unsigned flags,
struct page **pagep, void **fsdata);
extern struct inode *exofs_iget(struct super_block *, unsigned long);
struct inode *exofs_new_inode(struct inode *, int);
extern int exofs_write_inode(struct inode *, int);
extern void exofs_delete_inode(struct inode *);
/* dir.c: */
int exofs_add_link(struct dentry *, struct inode *);
ino_t exofs_inode_by_name(struct inode *, struct dentry *);
int exofs_delete_entry(struct exofs_dir_entry *, struct page *);
int exofs_make_empty(struct inode *, struct inode *);
struct exofs_dir_entry *exofs_find_entry(struct inode *, struct dentry *,
struct page **);
int exofs_empty_dir(struct inode *);
struct exofs_dir_entry *exofs_dotdot(struct inode *, struct page **);
ino_t exofs_parent_ino(struct dentry *child);
int exofs_set_link(struct inode *, struct exofs_dir_entry *, struct page *,
struct inode *);
/* super.c */
int exofs_sync_fs(struct super_block *sb, int wait);
/*********************
* operation vectors *
*********************/
/* dir.c: */
extern const struct file_operations exofs_dir_operations;
/* file.c */
extern const struct inode_operations exofs_file_inode_operations;
extern const struct file_operations exofs_file_operations;
/* inode.c */
extern const struct address_space_operations exofs_aops;
/* namei.c */
extern const struct inode_operations exofs_dir_inode_operations;
extern const struct inode_operations exofs_special_inode_operations;
/* symlink.c */
extern const struct inode_operations exofs_symlink_inode_operations;
extern const struct inode_operations exofs_fast_symlink_inode_operations;
#endif
|
