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diff --git a/fs/exofs/exofs.h b/fs/exofs/exofs.h
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1/*
2 * Copyright (C) 2005, 2006
3 * Avishay Traeger (avishay@gmail.com) (avishay@il.ibm.com)
4 * Copyright (C) 2005, 2006
5 * International Business Machines
6 * Copyright (C) 2008, 2009
7 * Boaz Harrosh <bharrosh@panasas.com>
8 *
9 * Copyrights for code taken from ext2:
10 * Copyright (C) 1992, 1993, 1994, 1995
11 * Remy Card (card@masi.ibp.fr)
12 * Laboratoire MASI - Institut Blaise Pascal
13 * Universite Pierre et Marie Curie (Paris VI)
14 * from
15 * linux/fs/minix/inode.c
16 * Copyright (C) 1991, 1992 Linus Torvalds
17 *
18 * This file is part of exofs.
19 *
20 * exofs is free software; you can redistribute it and/or modify
21 * it under the terms of the GNU General Public License as published by
22 * the Free Software Foundation. Since it is based on ext2, and the only
23 * valid version of GPL for the Linux kernel is version 2, the only valid
24 * version of GPL for exofs is version 2.
25 *
26 * exofs is distributed in the hope that it will be useful,
27 * but WITHOUT ANY WARRANTY; without even the implied warranty of
28 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
29 * GNU General Public License for more details.
30 *
31 * You should have received a copy of the GNU General Public License
32 * along with exofs; if not, write to the Free Software
33 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
34 */
35
36#include <linux/fs.h>
37#include <linux/time.h>
38#include "common.h"
39
40#ifndef __EXOFS_H__
41#define __EXOFS_H__
42
43#define EXOFS_ERR(fmt, a...) printk(KERN_ERR "exofs: " fmt, ##a)
44
45#ifdef CONFIG_EXOFS_DEBUG
46#define EXOFS_DBGMSG(fmt, a...) \
47 printk(KERN_NOTICE "exofs @%s:%d: " fmt, __func__, __LINE__, ##a)
48#else
49#define EXOFS_DBGMSG(fmt, a...) \
50 do { if (0) printk(fmt, ##a); } while (0)
51#endif
52
53/* u64 has problems with printk this will cast it to unsigned long long */
54#define _LLU(x) (unsigned long long)(x)
55
56/*
57 * our extension to the in-memory superblock
58 */
59struct exofs_sb_info {
60 struct osd_dev *s_dev; /* returned by get_osd_dev */
61 osd_id s_pid; /* partition ID of file system*/
62 int s_timeout; /* timeout for OSD operations */
63 uint64_t s_nextid; /* highest object ID used */
64 uint32_t s_numfiles; /* number of files on fs */
65 spinlock_t s_next_gen_lock; /* spinlock for gen # update */
66 u32 s_next_generation; /* next gen # to use */
67 atomic_t s_curr_pending; /* number of pending commands */
68 uint8_t s_cred[OSD_CAP_LEN]; /* all-powerful credential */
69};
70
71/*
72 * our extension to the in-memory inode
73 */
74struct exofs_i_info {
75 unsigned long i_flags; /* various atomic flags */
76 uint32_t i_data[EXOFS_IDATA];/*short symlink names and device #s*/
77 uint32_t i_dir_start_lookup; /* which page to start lookup */
78 wait_queue_head_t i_wq; /* wait queue for inode */
79 uint64_t i_commit_size; /* the object's written length */
80 uint8_t i_cred[OSD_CAP_LEN];/* all-powerful credential */
81 struct inode vfs_inode; /* normal in-memory inode */
82};
83
84/*
85 * our inode flags
86 */
87#define OBJ_2BCREATED 0 /* object will be created soon*/
88#define OBJ_CREATED 1 /* object has been created on the osd*/
89
90static inline int obj_2bcreated(struct exofs_i_info *oi)
91{
92 return test_bit(OBJ_2BCREATED, &oi->i_flags);
93}
94
95static inline void set_obj_2bcreated(struct exofs_i_info *oi)
96{
97 set_bit(OBJ_2BCREATED, &oi->i_flags);
98}
99
100static inline int obj_created(struct exofs_i_info *oi)
101{
102 return test_bit(OBJ_CREATED, &oi->i_flags);
103}
104
105static inline void set_obj_created(struct exofs_i_info *oi)
106{
107 set_bit(OBJ_CREATED, &oi->i_flags);
108}
109
110int __exofs_wait_obj_created(struct exofs_i_info *oi);
111static inline int wait_obj_created(struct exofs_i_info *oi)
112{
113 if (likely(obj_created(oi)))
114 return 0;
115
116 return __exofs_wait_obj_created(oi);
117}
118
119/*
120 * get to our inode from the vfs inode
121 */
122static inline struct exofs_i_info *exofs_i(struct inode *inode)
123{
124 return container_of(inode, struct exofs_i_info, vfs_inode);
125}
126
127/*
128 * Maximum count of links to a file
129 */
130#define EXOFS_LINK_MAX 32000
131
132/*************************
133 * function declarations *
134 *************************/
135/* inode.c */
136void exofs_truncate(struct inode *inode);
137int exofs_setattr(struct dentry *, struct iattr *);
138int exofs_write_begin(struct file *file, struct address_space *mapping,
139 loff_t pos, unsigned len, unsigned flags,
140 struct page **pagep, void **fsdata);
141extern struct inode *exofs_iget(struct super_block *, unsigned long);
142struct inode *exofs_new_inode(struct inode *, int);
143extern int exofs_write_inode(struct inode *, int);
144extern void exofs_delete_inode(struct inode *);
145
146/* dir.c: */
147int exofs_add_link(struct dentry *, struct inode *);
148ino_t exofs_inode_by_name(struct inode *, struct dentry *);
149int exofs_delete_entry(struct exofs_dir_entry *, struct page *);
150int exofs_make_empty(struct inode *, struct inode *);
151struct exofs_dir_entry *exofs_find_entry(struct inode *, struct dentry *,
152 struct page **);
153int exofs_empty_dir(struct inode *);
154struct exofs_dir_entry *exofs_dotdot(struct inode *, struct page **);
155ino_t exofs_parent_ino(struct dentry *child);
156int exofs_set_link(struct inode *, struct exofs_dir_entry *, struct page *,
157 struct inode *);
158
159/*********************
160 * operation vectors *
161 *********************/
162/* dir.c: */
163extern const struct file_operations exofs_dir_operations;
164
165/* file.c */
166extern const struct inode_operations exofs_file_inode_operations;
167extern const struct file_operations exofs_file_operations;
168
169/* inode.c */
170extern const struct address_space_operations exofs_aops;
171
172/* namei.c */
173extern const struct inode_operations exofs_dir_inode_operations;
174extern const struct inode_operations exofs_special_inode_operations;
175
176/* symlink.c */
177extern const struct inode_operations exofs_symlink_inode_operations;
178extern const struct inode_operations exofs_fast_symlink_inode_operations;
179
180#endif
generated by cgit v1.2.2 (git 2.25.0) at 2025-05-31 16:12:32 -0400