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