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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 | */ | |
59 | struct 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 | */ | |
74 | struct 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 | ||
90 | static inline int obj_2bcreated(struct exofs_i_info *oi) | |
91 | { | |
92 | return test_bit(OBJ_2BCREATED, &oi->i_flags); | |
93 | } | |
94 | ||
95 | static inline void set_obj_2bcreated(struct exofs_i_info *oi) | |
96 | { | |
97 | set_bit(OBJ_2BCREATED, &oi->i_flags); | |
98 | } | |
99 | ||
100 | static inline int obj_created(struct exofs_i_info *oi) | |
101 | { | |
102 | return test_bit(OBJ_CREATED, &oi->i_flags); | |
103 | } | |
104 | ||
105 | static inline void set_obj_created(struct exofs_i_info *oi) | |
106 | { | |
107 | set_bit(OBJ_CREATED, &oi->i_flags); | |
108 | } | |
109 | ||
110 | int __exofs_wait_obj_created(struct exofs_i_info *oi); | |
111 | static 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 | */ | |
122 | static inline struct exofs_i_info *exofs_i(struct inode *inode) | |
123 | { | |
124 | return container_of(inode, struct exofs_i_info, vfs_inode); | |
125 | } | |
126 | ||
e8062719 BH |
127 | /************************* |
128 | * function declarations * | |
129 | *************************/ | |
130 | /* inode.c */ | |
131 | void exofs_truncate(struct inode *inode); | |
132 | int exofs_setattr(struct dentry *, struct iattr *); | |
133 | ||
134 | /********************* | |
135 | * operation vectors * | |
136 | *********************/ | |
137 | /* file.c */ | |
138 | extern const struct inode_operations exofs_file_inode_operations; | |
139 | extern const struct file_operations exofs_file_operations; | |
140 | ||
b14f8ab2 | 141 | #endif |