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>
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)
15 * linux/fs/minix/inode.c
16 * Copyright (C) 1991, 1992 Linus Torvalds
18 * This file is part of exofs.
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.
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.
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
37 #include <linux/time.h>
43 #define EXOFS_ERR(fmt, a...) printk(KERN_ERR "exofs: " fmt, ##a)
45 #ifdef CONFIG_EXOFS_DEBUG
46 #define EXOFS_DBGMSG(fmt, a...) \
47 printk(KERN_NOTICE "exofs @%s:%d: " fmt, __func__, __LINE__, ##a)
49 #define EXOFS_DBGMSG(fmt, a...) \
50 do { if (0) printk(fmt, ##a); } while (0)
53 /* u64 has problems with printk this will cast it to unsigned long long */
54 #define _LLU(x) (unsigned long long)(x)
57 * our extension to the in-memory superblock
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 */
72 * our extension to the in-memory inode
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 */
87 #define OBJ_2BCREATED 0 /* object will be created soon*/
88 #define OBJ_CREATED 1 /* object has been created on the osd*/
90 static inline int obj_2bcreated(struct exofs_i_info *oi)
92 return test_bit(OBJ_2BCREATED, &oi->i_flags);
95 static inline void set_obj_2bcreated(struct exofs_i_info *oi)
97 set_bit(OBJ_2BCREATED, &oi->i_flags);
100 static inline int obj_created(struct exofs_i_info *oi)
102 return test_bit(OBJ_CREATED, &oi->i_flags);
105 static inline void set_obj_created(struct exofs_i_info *oi)
107 set_bit(OBJ_CREATED, &oi->i_flags);
110 int __exofs_wait_obj_created(struct exofs_i_info *oi);
111 static inline int wait_obj_created(struct exofs_i_info *oi)
113 if (likely(obj_created(oi)))
116 return __exofs_wait_obj_created(oi);
120 * get to our inode from the vfs inode
122 static inline struct exofs_i_info *exofs_i(struct inode *inode)
124 return container_of(inode, struct exofs_i_info, vfs_inode);
128 * Maximum count of links to a file
130 #define EXOFS_LINK_MAX 32000
132 /*************************
133 * function declarations *
134 *************************/
136 void exofs_truncate(struct inode *inode);
137 int exofs_setattr(struct dentry *, struct iattr *);
138 int exofs_write_begin(struct file *file, struct address_space *mapping,
139 loff_t pos, unsigned len, unsigned flags,
140 struct page **pagep, void **fsdata);
141 extern struct inode *exofs_iget(struct super_block *, unsigned long);
142 struct inode *exofs_new_inode(struct inode *, int);
143 extern int exofs_write_inode(struct inode *, int);
144 extern void exofs_delete_inode(struct inode *);
147 int exofs_add_link(struct dentry *, struct inode *);
148 ino_t exofs_inode_by_name(struct inode *, struct dentry *);
149 int exofs_delete_entry(struct exofs_dir_entry *, struct page *);
150 int exofs_make_empty(struct inode *, struct inode *);
151 struct exofs_dir_entry *exofs_find_entry(struct inode *, struct dentry *,
153 int exofs_empty_dir(struct inode *);
154 struct exofs_dir_entry *exofs_dotdot(struct inode *, struct page **);
155 ino_t exofs_parent_ino(struct dentry *child);
156 int exofs_set_link(struct inode *, struct exofs_dir_entry *, struct page *,
159 /*********************
160 * operation vectors *
161 *********************/
163 extern const struct file_operations exofs_dir_operations;
166 extern const struct inode_operations exofs_file_inode_operations;
167 extern const struct file_operations exofs_file_operations;
170 extern const struct address_space_operations exofs_aops;
173 extern const struct inode_operations exofs_dir_inode_operations;
174 extern const struct inode_operations exofs_special_inode_operations;
177 extern const struct inode_operations exofs_symlink_inode_operations;
178 extern const struct inode_operations exofs_fast_symlink_inode_operations;