VisionFive2 Linux kernel

b24413180f560 (Greg Kroah-Hartman 2017-11-01 15:07:57 +0100   1) /* SPDX-License-Identifier: GPL-2.0 */
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700   2) #ifndef _SYSV_H
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700   3) #define _SYSV_H
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700   4) 
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700   5) #include <linux/buffer_head.h>
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700   6) 
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700   7) typedef __u16 __bitwise __fs16;
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700   8) typedef __u32 __bitwise __fs32;
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700   9) 
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  10) #include <linux/sysv_fs.h>
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  11) 
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  12) /*
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  13)  * SystemV/V7/Coherent super-block data in memory
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  14)  *
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  15)  * The SystemV/V7/Coherent superblock contains dynamic data (it gets modified
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  16)  * while the system is running). This is in contrast to the Minix and Berkeley
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  17)  * filesystems (where the superblock is never modified). This affects the
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  18)  * sync() operation: we must keep the superblock in a disk buffer and use this
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  19)  * one as our "working copy".
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  20)  */
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  21) 
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  22) struct sysv_sb_info {
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  23) 	struct super_block *s_sb;	/* VFS superblock */
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  24) 	int	       s_type;		/* file system type: FSTYPE_{XENIX|SYSV|COH} */
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  25) 	char	       s_bytesex;	/* bytesex (le/be/pdp) */
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  26) 	unsigned int   s_inodes_per_block;	/* number of inodes per block */
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  27) 	unsigned int   s_inodes_per_block_1;	/* inodes_per_block - 1 */
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  28) 	unsigned int   s_inodes_per_block_bits;	/* log2(inodes_per_block) */
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  29) 	unsigned int   s_ind_per_block;		/* number of indirections per block */
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  30) 	unsigned int   s_ind_per_block_bits;	/* log2(ind_per_block) */
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  31) 	unsigned int   s_ind_per_block_2;	/* ind_per_block ^ 2 */
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  32) 	unsigned int   s_toobig_block;		/* 10 + ipb + ipb^2 + ipb^3 */
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  33) 	unsigned int   s_block_base;	/* physical block number of block 0 */
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  34) 	unsigned short s_fic_size;	/* free inode cache size, NICINOD */
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  35) 	unsigned short s_flc_size;	/* free block list chunk size, NICFREE */
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  36) 	/* The superblock is kept in one or two disk buffers: */
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  37) 	struct buffer_head *s_bh1;
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  38) 	struct buffer_head *s_bh2;
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  39) 	/* These are pointers into the disk buffer, to compensate for
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  40) 	   different superblock layout. */
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  41) 	char *         s_sbd1;		/* entire superblock data, for part 1 */
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  42) 	char *         s_sbd2;		/* entire superblock data, for part 2 */
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  43) 	__fs16         *s_sb_fic_count;	/* pointer to s_sbd->s_ninode */
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  44)         sysv_ino_t     *s_sb_fic_inodes; /* pointer to s_sbd->s_inode */
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  45) 	__fs16         *s_sb_total_free_inodes; /* pointer to s_sbd->s_tinode */
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  46) 	__fs16         *s_bcache_count;	/* pointer to s_sbd->s_nfree */
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  47) 	sysv_zone_t    *s_bcache;	/* pointer to s_sbd->s_free */
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  48) 	__fs32         *s_free_blocks;	/* pointer to s_sbd->s_tfree */
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  49) 	__fs32         *s_sb_time;	/* pointer to s_sbd->s_time */
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  50) 	__fs32         *s_sb_state;	/* pointer to s_sbd->s_state, only FSTYPE_SYSV */
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  51) 	/* We keep those superblock entities that don't change here;
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  52) 	   this saves us an indirection and perhaps a conversion. */
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  53) 	u32            s_firstinodezone; /* index of first inode zone */
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  54) 	u32            s_firstdatazone;	/* same as s_sbd->s_isize */
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  55) 	u32            s_ninodes;	/* total number of inodes */
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  56) 	u32            s_ndatazones;	/* total number of data zones */
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  57) 	u32            s_nzones;	/* same as s_sbd->s_fsize */
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  58) 	u16	       s_namelen;       /* max length of dir entry */
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  59) 	int	       s_forced_ro;
c07cb01c45d6f (Marco Stornelli    2012-10-06 12:41:46 +0200  60) 	struct mutex s_lock;
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  61) };
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  62) 
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  63) /*
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  64)  * SystemV/V7/Coherent FS inode data in memory
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  65)  */
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  66) struct sysv_inode_info {
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  67) 	__fs32		i_data[13];
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  68) 	u32		i_dir_start_lookup;
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  69) 	struct inode	vfs_inode;
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  70) };
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  71) 
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  72) 
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  73) static inline struct sysv_inode_info *SYSV_I(struct inode *inode)
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  74) {
db6172c411945 (Rasmus Villemoes   2015-03-19 12:28:04 +0100  75) 	return container_of(inode, struct sysv_inode_info, vfs_inode);
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  76) }
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  77) 
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  78) static inline struct sysv_sb_info *SYSV_SB(struct super_block *sb)
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  79) {
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  80) 	return sb->s_fs_info;
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  81) }
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  82) 
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  83) 
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  84) /* identify the FS in memory */
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  85) enum {
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  86) 	FSTYPE_NONE = 0,
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  87) 	FSTYPE_XENIX,
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  88) 	FSTYPE_SYSV4,
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  89) 	FSTYPE_SYSV2,
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  90) 	FSTYPE_COH,
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  91) 	FSTYPE_V7,
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  92) 	FSTYPE_AFS,
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  93) 	FSTYPE_END,
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  94) };
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  95) 
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  96) #define SYSV_MAGIC_BASE		0x012FF7B3
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  97) 
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  98) #define XENIX_SUPER_MAGIC	(SYSV_MAGIC_BASE+FSTYPE_XENIX)
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  99) #define SYSV4_SUPER_MAGIC	(SYSV_MAGIC_BASE+FSTYPE_SYSV4)
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 100) #define SYSV2_SUPER_MAGIC	(SYSV_MAGIC_BASE+FSTYPE_SYSV2)
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 101) #define COH_SUPER_MAGIC		(SYSV_MAGIC_BASE+FSTYPE_COH)
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 102) 
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 103) 
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 104) /* Admissible values for i_nlink: 0.._LINK_MAX */
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 105) enum {
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 106) 	XENIX_LINK_MAX	=	126,	/* ?? */
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 107) 	SYSV_LINK_MAX	=	126,	/* 127? 251? */
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 108) 	V7_LINK_MAX     =	126,	/* ?? */
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 109) 	COH_LINK_MAX	=	10000,
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 110) };
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 111) 
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 112) 
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 113) static inline void dirty_sb(struct super_block *sb)
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 114) {
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 115) 	struct sysv_sb_info *sbi = SYSV_SB(sb);
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 116) 
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 117) 	mark_buffer_dirty(sbi->s_bh1);
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 118) 	if (sbi->s_bh1 != sbi->s_bh2)
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 119) 		mark_buffer_dirty(sbi->s_bh2);
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 120) }
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 121) 
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 122) 
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 123) /* ialloc.c */
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 124) extern struct sysv_inode *sysv_raw_inode(struct super_block *, unsigned,
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 125) 			struct buffer_head **);
dd716e64d60f2 (Al Viro            2011-07-26 02:49:38 -0400 126) extern struct inode * sysv_new_inode(const struct inode *, umode_t);
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 127) extern void sysv_free_inode(struct inode *);
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 128) extern unsigned long sysv_count_free_inodes(struct super_block *);
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 129) 
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 130) /* balloc.c */
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 131) extern sysv_zone_t sysv_new_block(struct super_block *);
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 132) extern void sysv_free_block(struct super_block *, sysv_zone_t);
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 133) extern unsigned long sysv_count_free_blocks(struct super_block *);
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 134) 
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 135) /* itree.c */
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 136) extern void sysv_truncate(struct inode *);
f4e420dc42314 (Christoph Hellwig  2010-06-04 11:29:56 +0200 137) extern int sysv_prepare_chunk(struct page *page, loff_t pos, unsigned len);
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 138) 
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 139) /* inode.c */
b8e1343f67460 (David Howells      2008-02-07 00:15:47 -0800 140) extern struct inode *sysv_iget(struct super_block *, unsigned int);
a9185b41a4f84 (Christoph Hellwig  2010-03-05 09:21:37 +0100 141) extern int sysv_write_inode(struct inode *, struct writeback_control *wbc);
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 142) extern int sysv_sync_inode(struct inode *);
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 143) extern void sysv_set_inode(struct inode *, dev_t);
549c7297717c3 (Christian Brauner  2021-01-21 14:19:43 +0100 144) extern int sysv_getattr(struct user_namespace *, const struct path *,
549c7297717c3 (Christian Brauner  2021-01-21 14:19:43 +0100 145) 			struct kstat *, u32, unsigned int);
3b2b96abbf321 (Adrian Bunk        2006-12-22 01:07:09 -0800 146) extern int sysv_init_icache(void);
3b2b96abbf321 (Adrian Bunk        2006-12-22 01:07:09 -0800 147) extern void sysv_destroy_icache(void);
3b2b96abbf321 (Adrian Bunk        2006-12-22 01:07:09 -0800 148) 
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 149) 
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 150) /* dir.c */
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 151) extern struct sysv_dir_entry *sysv_find_entry(struct dentry *, struct page **);
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 152) extern int sysv_add_link(struct dentry *, struct inode *);
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 153) extern int sysv_delete_entry(struct sysv_dir_entry *, struct page *);
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 154) extern int sysv_make_empty(struct inode *, struct inode *);
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 155) extern int sysv_empty_dir(struct inode *);
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 156) extern void sysv_set_link(struct sysv_dir_entry *, struct page *,
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 157) 			struct inode *);
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 158) extern struct sysv_dir_entry *sysv_dotdot(struct inode *, struct page **);
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 159) extern ino_t sysv_inode_by_name(struct dentry *);
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 160) 
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 161) 
c5ef1c42c51b1 (Arjan van de Ven   2007-02-12 00:55:40 -0800 162) extern const struct inode_operations sysv_file_inode_operations;
c5ef1c42c51b1 (Arjan van de Ven   2007-02-12 00:55:40 -0800 163) extern const struct inode_operations sysv_dir_inode_operations;
4b6f5d20b04dc (Arjan van de Ven   2006-03-28 01:56:42 -0800 164) extern const struct file_operations sysv_file_operations;
4b6f5d20b04dc (Arjan van de Ven   2006-03-28 01:56:42 -0800 165) extern const struct file_operations sysv_dir_operations;
f5e54d6e53a20 (Christoph Hellwig  2006-06-28 04:26:44 -0700 166) extern const struct address_space_operations sysv_aops;
ee9b6d61a2a43 (Josef 'Jeff' Sipek 2007-02-12 00:55:41 -0800 167) extern const struct super_operations sysv_sops;
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 168) 
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 169) 
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 170) enum {
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 171) 	BYTESEX_LE,
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 172) 	BYTESEX_PDP,
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 173) 	BYTESEX_BE,
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 174) };
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 175) 
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 176) static inline u32 PDP_swab(u32 x)
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 177) {
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 178) #ifdef __LITTLE_ENDIAN
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 179) 	return ((x & 0xffff) << 16) | ((x & 0xffff0000) >> 16);
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 180) #else
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 181) #ifdef __BIG_ENDIAN
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 182) 	return ((x & 0xff00ff) << 8) | ((x & 0xff00ff00) >> 8);
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 183) #else
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 184) #error BYTESEX
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 185) #endif
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 186) #endif
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 187) }
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 188) 
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 189) static inline __u32 fs32_to_cpu(struct sysv_sb_info *sbi, __fs32 n)
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 190) {
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 191) 	if (sbi->s_bytesex == BYTESEX_PDP)
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 192) 		return PDP_swab((__force __u32)n);
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 193) 	else if (sbi->s_bytesex == BYTESEX_LE)
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 194) 		return le32_to_cpu((__force __le32)n);
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 195) 	else
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 196) 		return be32_to_cpu((__force __be32)n);
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 197) }
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 198) 
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 199) static inline __fs32 cpu_to_fs32(struct sysv_sb_info *sbi, __u32 n)
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 200) {
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 201) 	if (sbi->s_bytesex == BYTESEX_PDP)
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 202) 		return (__force __fs32)PDP_swab(n);
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 203) 	else if (sbi->s_bytesex == BYTESEX_LE)
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 204) 		return (__force __fs32)cpu_to_le32(n);
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 205) 	else
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 206) 		return (__force __fs32)cpu_to_be32(n);
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 207) }
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 208) 
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 209) static inline __fs32 fs32_add(struct sysv_sb_info *sbi, __fs32 *n, int d)
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 210) {
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 211) 	if (sbi->s_bytesex == BYTESEX_PDP)
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 212) 		*(__u32*)n = PDP_swab(PDP_swab(*(__u32*)n)+d);
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 213) 	else if (sbi->s_bytesex == BYTESEX_LE)
07132922aac0c (Marcin Slusarz     2008-04-30 00:54:49 -0700 214) 		le32_add_cpu((__le32 *)n, d);
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 215) 	else
07132922aac0c (Marcin Slusarz     2008-04-30 00:54:49 -0700 216) 		be32_add_cpu((__be32 *)n, d);
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 217) 	return *n;
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 218) }
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 219) 
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 220) static inline __u16 fs16_to_cpu(struct sysv_sb_info *sbi, __fs16 n)
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 221) {
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 222) 	if (sbi->s_bytesex != BYTESEX_BE)
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 223) 		return le16_to_cpu((__force __le16)n);
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 224) 	else
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 225) 		return be16_to_cpu((__force __be16)n);
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 226) }
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 227) 
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 228) static inline __fs16 cpu_to_fs16(struct sysv_sb_info *sbi, __u16 n)
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 229) {
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 230) 	if (sbi->s_bytesex != BYTESEX_BE)
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 231) 		return (__force __fs16)cpu_to_le16(n);
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 232) 	else
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 233) 		return (__force __fs16)cpu_to_be16(n);
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 234) }
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 235) 
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 236) static inline __fs16 fs16_add(struct sysv_sb_info *sbi, __fs16 *n, int d)
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 237) {
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 238) 	if (sbi->s_bytesex != BYTESEX_BE)
07132922aac0c (Marcin Slusarz     2008-04-30 00:54:49 -0700 239) 		le16_add_cpu((__le16 *)n, d);
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 240) 	else
07132922aac0c (Marcin Slusarz     2008-04-30 00:54:49 -0700 241) 		be16_add_cpu((__be16 *)n, d);
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 242) 	return *n;
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 243) }
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 244) 
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 245) #endif /* _SYSV_H */