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android_kernel_samsung_hero.../fs/sdfat/sdfat.h
HackerOO7 2bd1731e0a init: OSRC G9300ZCU2APF7
2016-08-17 16:41:52 +08:00

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/*
* Copyright (C) 2012-2013 Samsung Electronics Co., Ltd.
*
* This program 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; either version 2
* of the License, or (at your option) any later version.
*
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
* MA 02110-1301, USA.
*/
#ifndef _SDFAT_H
#define _SDFAT_H
#include <linux/buffer_head.h>
#include <linux/string.h>
#include <linux/types.h>
#include <linux/nls.h>
#include <linux/fs.h>
#include <linux/mutex.h>
#include <linux/ratelimit.h>
#include <linux/version.h>
#include <linux/kobject.h>
#include "api.h"
#ifdef CONFIG_SDFAT_DFR
#include "dfr.h"
#endif
/*
* sdfat error flags
*/
#define SDFAT_ERRORS_CONT 1 /* ignore error and continue */
#define SDFAT_ERRORS_PANIC 2 /* panic on error */
#define SDFAT_ERRORS_RO 3 /* remount r/o on error */
/*
* sdfat allocator flags
*/
#define SDFAT_ALLOC_DELAY 1 /* Delayed allocation */
#define SDFAT_ALLOC_SMART 2 /* Smart allocation */
/*
* sdfat allocator destination for smart allocation
*/
#define ALLOC_NOWHERE 0
#define ALLOC_COLD 1
#define ALLOC_HOT 16
#define ALLOC_COLD_ALIGNED 1
#define ALLOC_COLD_PACKING 2
#define ALLOC_COLD_SEQ 4
/*
* sdfat common MACRO
*/
#define CLUSTER_16(x) ((u16)((x) & 0xFFFFU))
#define CLUSTER_32(x) ((u32)((x) & 0xFFFFFFFFU))
#define CLUS_EOF CLUSTER_32(~0)
#define CLUS_FREE (0)
#define CLUS_BASE (2)
#define IS_CLUS_EOF(x) (x == CLUS_EOF)
#define IS_CLUS_FREE(x) (x == CLUS_FREE)
#define IS_LAST_SECT_IN_CLUS(fsi, sec) \
( (((sec) - (fsi)->data_start_sector + 1) \
& ((1 << (fsi)->sect_per_clus_bits) -1)) == 0 )
#define CLUS_TO_SECT(fsi, x) \
( (((x) - CLUS_BASE) << (fsi)->sect_per_clus_bits) + (fsi)->data_start_sector )
#define SECT_TO_CLUS(fsi, sec) \
((((sec) - (fsi)->data_start_sector) >> (fsi)->sect_per_clus_bits) + CLUS_BASE)
/* variables defined at sdfat.c */
extern const char* FS_TYPE_STR[];
enum {
FS_TYPE_AUTO,
FS_TYPE_EXFAT,
FS_TYPE_VFAT,
FS_TYPE_MAX
};
/*
* sdfat mount in-memory data
*/
struct sdfat_mount_options {
#if LINUX_VERSION_CODE < KERNEL_VERSION(3,5,0)
uid_t fs_uid;
gid_t fs_gid;
#else
kuid_t fs_uid;
kgid_t fs_gid;
#endif
unsigned short fs_fmask;
unsigned short fs_dmask;
unsigned short allow_utime; /* permission for setting the [am]time */
unsigned short codepage; /* codepage for shortname conversions */
char *iocharset; /* charset for filename input/display */
struct {
unsigned int pack_ratio;
unsigned int sect_per_au;
unsigned int misaligned_sect;
} amap_opt; /* AMAP-related options (see amap.c) */
unsigned char utf8;
unsigned char casesensitive;
unsigned char adj_hidsect;
unsigned char tz_utc;
unsigned char improved_allocation;
unsigned char defrag;
unsigned char symlink; /* support symlink operation */
unsigned char errors; /* on error: continue, panic, remount-ro */
unsigned char discard; /* flag on if -o dicard specified and device support discard() */
unsigned char fs_type; /* fs_type that user specified */
unsigned short adj_req; /* support aligned mpage write */
};
#define SDFAT_HASH_BITS 8
#define SDFAT_HASH_SIZE (1UL << SDFAT_HASH_BITS)
/*
* SDFAT file system superblock in-memory data
*/
struct sdfat_sb_info {
FS_INFO_T fsi; /* private filesystem info */
struct mutex s_vlock; /* volume lock */
int use_vmalloc;
#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,7,00)
int s_dirt;
struct mutex s_lock; /* superblock lock */
int write_super_queued; /* Write_super work is pending? */
struct delayed_work write_super_work; /* Work_queue data structrue for write_super() */
spinlock_t work_lock; /* Lock for WQ */
#endif
struct super_block *host_sb; /* sb pointer */
struct sdfat_mount_options options;
struct nls_table *nls_disk; /* Codepage used on disk */
struct nls_table *nls_io; /* Charset used for input and display */
struct ratelimit_state ratelimit;
spinlock_t inode_hash_lock;
struct hlist_head inode_hashtable[SDFAT_HASH_SIZE];
struct kobject sb_kobj;
#ifdef CONFIG_SDFAT_DBG_IOCTL
long debug_flags;
#endif /* CONFIG_SDFAT_DBG_IOCTL */
#ifdef CONFIG_SDFAT_DFR
struct defrag_info dfr_info;
struct completion dfr_complete;
unsigned int *dfr_new_clus;
int dfr_new_idx;
unsigned int *dfr_page_wb;
void **dfr_pagep;
unsigned int dfr_hint_clus;
unsigned int dfr_hint_idx;
int dfr_reserved_clus;
#ifdef CONFIG_SDFAT_DFR_DEBUG
int dfr_spo_flag;
#endif /* CONFIG_SDFAT_DFR_DEBUG */
#endif /* CONFIG_SDFAT_DFR */
#ifdef CONFIG_SDFAT_TRACE_IO
/* Statistics for allocator */
unsigned int stat_n_pages_written; /* # of written pages in total */
unsigned int stat_n_pages_added; /* # of added blocks in total */
unsigned int stat_n_bdev_pages_written; /* # of written pages owned by bdev inode */
unsigned int stat_n_pages_confused;
#endif
atomic_t stat_n_pages_queued; /* # of pages in the request queue (approx.) */
};
/*
* SDFAT file system inode in-memory data
*/
struct sdfat_inode_info {
FILE_ID_T fid;
char *target;
/* NOTE: i_size_ondisk is 64bits, so must hold ->i_mutex to access */
loff_t i_size_ondisk; /* physically allocated size */
loff_t i_size_aligned; /* block-aligned i_size (used in cont_write_begin) */
loff_t i_pos; /* on-disk position of directory entry or 0 */
struct hlist_node i_hash_fat; /* hash by i_location */
#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,4,00)
struct rw_semaphore truncate_lock; /* protect bmap against truncate */
#endif
#ifdef CONFIG_SDFAT_DFR
struct defrag_info dfr_info;
#endif
struct inode vfs_inode;
};
/*
* FIXME : needs on-disk-slot in-memory data
*/
/* static inline functons */
static inline struct sdfat_sb_info *SDFAT_SB(struct super_block *sb)
{
return (struct sdfat_sb_info*)sb->s_fs_info;
}
static inline struct sdfat_inode_info *SDFAT_I(struct inode *inode)
{
return container_of(inode, struct sdfat_inode_info, vfs_inode);
}
/*
* If ->i_mode can't hold S_IWUGO (i.e. ATTR_RO), we use ->i_attrs to
* save ATTR_RO instead of ->i_mode.
*
* If it's directory and !sbi->options.rodir, ATTR_RO isn't read-only
* bit, it's just used as flag for app.
*/
static inline int sdfat_mode_can_hold_ro(struct inode *inode)
{
struct sdfat_sb_info *sbi = SDFAT_SB(inode->i_sb);
if (S_ISDIR(inode->i_mode))
return 0;
if ((~sbi->options.fs_fmask) & S_IWUGO)
return 1;
return 0;
}
/*
* FIXME : needs to check symlink option.
*/
/* Convert attribute bits and a mask to the UNIX mode. */
static inline mode_t sdfat_make_mode(struct sdfat_sb_info *sbi,
u32 attr, mode_t mode)
{
if ((attr & ATTR_READONLY) && !(attr & ATTR_SUBDIR))
mode &= ~S_IWUGO;
if (attr & ATTR_SUBDIR)
return (mode & ~sbi->options.fs_dmask) | S_IFDIR;
else if (attr & ATTR_SYMLINK)
return (mode & ~sbi->options.fs_dmask) | S_IFLNK;
else
return (mode & ~sbi->options.fs_fmask) | S_IFREG;
}
/* Return the FAT attribute byte for this inode */
static inline u32 sdfat_make_attr(struct inode *inode)
{
u32 attrs = SDFAT_I(inode)->fid.attr;
if (S_ISDIR(inode->i_mode))
attrs |= ATTR_SUBDIR;
if (sdfat_mode_can_hold_ro(inode) && !(inode->i_mode & S_IWUGO))
attrs |= ATTR_READONLY;
return attrs;
}
static inline void sdfat_save_attr(struct inode *inode, u32 attr)
{
if (sdfat_mode_can_hold_ro(inode))
SDFAT_I(inode)->fid.attr = attr & ATTR_RWMASK;
else
SDFAT_I(inode)->fid.attr = attr & (ATTR_RWMASK | ATTR_READONLY);
}
/* sdfat/nls.c */
/* NLS management function */
s32 nls_cmp_sfn(struct super_block *sb, u8 *a, u8 *b);
s32 nls_cmp_uniname(struct super_block *sb, u16 *a, u16 *b);
s32 nls_uni16s_to_sfn(struct super_block *sb, UNI_NAME_T *p_uniname, DOS_NAME_T *p_dosname, s32 *p_lossy);
s32 nls_sfn_to_uni16s(struct super_block *sb, DOS_NAME_T *p_dosname, UNI_NAME_T *p_uniname);
s32 nls_uni16s_to_vfsname(struct super_block *sb, UNI_NAME_T *uniname, u8 *p_cstring, s32 len);
s32 nls_vfsname_to_uni16s(struct super_block *sb, const u8 *p_cstring, const s32 len, UNI_NAME_T *uniname, s32 *p_lossy);
/* sdfat/mpage.c */
#ifdef CONFIG_SDFAT_ALIGNED_MPAGE_WRITE
int sdfat_mpage_writepages(struct address_space *mapping,
struct writeback_control *wbc, get_block_t *get_block);
#endif
/* sdfat/xattr.c */
#ifdef CONFIG_SDFAT_VIRTUAL_XATTR
extern int sdfat_setxattr(struct dentry*dentry, const char *name, const void *value, size_t size, int flags);
extern ssize_t sdfat_getxattr(struct dentry *dentry, const char *name, void *value, size_t size);
extern ssize_t sdfat_listxattr(struct dentry *dentry, char *list, size_t size);
extern int sdfat_removexattr(struct dentry *dentry, const char *name);
#endif
/* sdfat/misc.c */
extern void
__sdfat_fs_error(struct super_block *sb, int report, const char *fmt, ...)
__attribute__ ((format (printf, 3, 4))) __cold;
#define sdfat_fs_error(sb, fmt, args...) \
__sdfat_fs_error(sb, 1, fmt , ## args)
#define sdfat_fs_error_ratelimit(sb, fmt, args...) \
__sdfat_fs_error(sb, __ratelimit(&SDFAT_SB(sb)->ratelimit), fmt, ## args)
extern void
__sdfat_msg(struct super_block *sb, const char *lv, int st, const char *fmt, ...)
__attribute__ ((format (printf, 4, 5))) __cold;
#define sdfat_msg(sb, lv, fmt, args...) \
__sdfat_msg(sb, lv, 0, fmt , ## args)
#define sdfat_log_msg(sb, lv, fmt, args...) \
__sdfat_msg(sb, lv, 1, fmt , ## args)
extern void sdfat_time_fat2unix(struct sdfat_sb_info *sbi, struct timespec *ts,
DATE_TIME_T *tp);
extern void sdfat_time_unix2fat(struct sdfat_sb_info *sbi, struct timespec *ts,
DATE_TIME_T *tp);
extern TIMESTAMP_T *tm_now(struct sdfat_sb_info *sbi, TIMESTAMP_T *tm);
#ifdef CONFIG_SDFAT_DEBUG
#ifdef CONFIG_SDFAT_DBG_CAREFUL
void sdfat_debug_check_clusters(struct inode *inode);
#else
#define sdfat_debug_check_clusters(inode)
#endif /* CONFIG_SDFAT_DBG_CAREFUL */
#ifdef CONFIG_SDFAT_DBG_BUGON
#define sdfat_debug_bug_on(expr) BUG_ON(expr)
#else
#define sdfat_debug_bug_on(expr)
#endif
#ifdef CONFIG_SDFAT_DBG_WARNON
#define sdfat_debug_warn_on(expr) WARN_ON(expr)
#else
#define sdfat_debug_warn_on(expr)
#endif
#else /* CONFIG_SDFAT_DEBUG */
#define sdfat_debug_check_clusters(inode)
#define sdfat_debug_bug_on(expr)
#endif /* CONFIG_SDFAT_DEBUG */
#ifdef CONFIG_SDFAT_TRACE_ELAPSED_TIME
u32 sdfat_time_current_usec(struct timeval* tv);
extern struct timeval __t1;
extern struct timeval __t2;
#define TIME_GET(tv) sdfat_time_current_usec(tv)
#define TIME_START(s) do {sdfat_time_current_usec(s); } while (0)
#define TIME_END(e) do {sdfat_time_current_usec(e); } while (0)
#define TIME_ELAPSED(s, e) ((u32)(((e)->tv_sec - (s)->tv_sec) * 1000000 + \
((e)->tv_usec - (s)->tv_usec)))
#define PRINT_TIME(n) \
do { \
printk("[SDFAT] Elapsed time %d = %d (usec)\n", \
n, (__t2 - __t1)); \
} while(0)
#else /* CONFIG_SDFAT_TRACE_ELAPSED_TIME */
#define TIME_GET(tv) (0)
#define TIME_START(s)
#define TIME_END(e)
#define TIME_ELAPSED(s, e) (0)
#define PRINT_TIME(n)
#endif /* CONFIG_SDFAT_TRACE_ELAPSED_TIME */
#define SDFAT_MSG_LV_NONE (0x00000000)
#define SDFAT_MSG_LV_ERR (0x00000001)
#define SDFAT_MSG_LV_INFO (0x00000002)
#define SDFAT_MSG_LV_DBG (0x00000003)
#define SDFAT_MSG_LV_MORE (0x00000004)
#define SDFAT_MSG_LV_TRACE (0x00000005)
#define SDFAT_MSG_LV_ALL (0x00000006)
#define SDFAT_MSG_LEVEL SDFAT_MSG_LV_INFO
#define SDFAT_TAG_NAME "SDFAT"
#define __S(x) #x
#define _S(x) __S(x)
extern void __sdfat_dmsg(int level, const char *fmt, ...)
__attribute__ ((format (printf, 2, 3))) __cold;
#define SDFAT_EMSG_T(level, ...) __sdfat_dmsg(level, KERN_ERR "[" SDFAT_TAG_NAME "] [" _S(__FILE__) "(" _S(__LINE__) ")] " __VA_ARGS__)
#define SDFAT_DMSG_T(level, ...) __sdfat_dmsg(level, KERN_INFO "[" SDFAT_TAG_NAME "] " __VA_ARGS__)
#define SDFAT_EMSG(...) SDFAT_EMSG_T(SDFAT_MSG_LV_ERR, __VA_ARGS__)
#define SDFAT_IMSG(...) SDFAT_DMSG_T(SDFAT_MSG_LV_INFO, __VA_ARGS__)
#define SDFAT_DMSG(...) SDFAT_DMSG_T(SDFAT_MSG_LV_DBG, __VA_ARGS__)
#define SDFAT_MMSG(...) SDFAT_DMSG_T(SDFAT_MSG_LV_MORE, __VA_ARGS__)
#define SDFAT_TMSG(...) SDFAT_DMSG_T(SDFAT_MSG_LV_TRACE, __VA_ARGS__)
#define EMSG(...)
#define IMSG(...)
#define DMSG(...)
#define MMSG(...)
#define TMSG(...)
#define EMSG_VAR(exp)
#define IMSG_VAR(exp)
#define DMSG_VAR(exp)
#define MMSG_VAR(exp)
#define TMSG_VAR(exp)
#ifdef CONFIG_SDFAT_DBG_MSG
#if (SDFAT_MSG_LEVEL >= SDFAT_MSG_LV_ERR)
#undef EMSG
#undef EMSG_VAR
#define EMSG(...) SDFAT_EMSG(__VA_ARGS__)
#define EMSG_VAR(exp) exp
#endif
#if (SDFAT_MSG_LEVEL >= SDFAT_MSG_LV_INFO)
#undef IMSG
#undef IMSG_VAR
#define IMSG(...) SDFAT_IMSG(__VA_ARGS__)
#define IMSG_VAR(exp) exp
#endif
#if (SDFAT_MSG_LEVEL >= SDFAT_MSG_LV_DBG)
#undef DMSG
#undef DMSG_VAR
#define DMSG(...) SDFAT_DMSG(__VA_ARGS__)
#define DMSG_VAR(exp) exp
#endif
#if (SDFAT_MSG_LEVEL >= SDFAT_MSG_LV_MORE)
#undef MMSG
#undef MMSG_VAR
#define MMSG(...) SDFAT_MMSG(__VA_ARGS__)
#define MMSG_VAR(exp) exp
#endif
/* should replace with trace function */
#if (SDFAT_MSG_LEVEL >= SDFAT_MSG_LV_TRACE)
#undef TMSG
#undef TMSG_VAR
#define TMSG(...) SDFAT_TMSG(__VA_ARGS__)
#define TMSG_VAR(exp) exp
#endif
#endif /* CONFIG_SDFAT_DBG_MSG */
#define ASSERT(expr) \
if (!(expr)) { \
printk(KERN_ERR "Assertion failed! %s\n", #expr); \
BUG_ON(1); \
}
#endif /* !_SDFAT_H */
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