181 lines
5.8 KiB
C
181 lines
5.8 KiB
C
/*
|
|
* Copyright (C) 2005, 2006
|
|
* Avishay Traeger (avishay@gmail.com) (avishay@il.ibm.com)
|
|
* Copyright (C) 2005, 2006
|
|
* International Business Machines
|
|
* 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 *);
|
|
|
|
/*********************
|
|
* 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
|