xref: /openbmc/linux/fs/jfs/jfs_types.h (revision 1a59d1b8)
1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /*
3  *   Copyright (C) International Business Machines Corp., 2000-2004
4  */
5 #ifndef _H_JFS_TYPES
6 #define	_H_JFS_TYPES
7 
8 /*
9  *	jfs_types.h:
10  *
11  * basic type/utility definitions
12  *
13  * note: this header file must be the 1st include file
14  * of JFS include list in all JFS .c file.
15  */
16 
17 #include <linux/types.h>
18 #include <linux/nls.h>
19 
20 /*
21  * transaction and lock id's
22  *
23  * Don't change these without carefully considering the impact on the
24  * size and alignment of all of the linelock variants
25  */
26 typedef u16 tid_t;
27 typedef u16 lid_t;
28 
29 /*
30  * Almost identical to Linux's timespec, but not quite
31  */
32 struct timestruc_t {
33 	__le32 tv_sec;
34 	__le32 tv_nsec;
35 };
36 
37 /*
38  *	handy
39  */
40 
41 #define LEFTMOSTONE	0x80000000
42 #define	HIGHORDER	0x80000000u	/* high order bit on	*/
43 #define	ONES		0xffffffffu	/* all bit on		*/
44 
45 /*
46  *	physical xd (pxd)
47  *
48  *	The leftmost 24 bits of len_addr are the extent length.
49  *	The rightmost 8 bits of len_addr are the most signficant bits of
50  *	the extent address
51  */
52 typedef struct {
53 	__le32 len_addr;
54 	__le32 addr2;
55 } pxd_t;
56 
57 /* xd_t field construction */
58 
PXDlength(pxd_t * pxd,__u32 len)59 static inline void PXDlength(pxd_t *pxd, __u32 len)
60 {
61 	pxd->len_addr = (pxd->len_addr & cpu_to_le32(~0xffffff)) |
62 			cpu_to_le32(len & 0xffffff);
63 }
64 
PXDaddress(pxd_t * pxd,__u64 addr)65 static inline void PXDaddress(pxd_t *pxd, __u64 addr)
66 {
67 	pxd->len_addr = (pxd->len_addr & cpu_to_le32(0xffffff)) |
68 			cpu_to_le32((addr >> 32)<<24);
69 	pxd->addr2 = cpu_to_le32(addr & 0xffffffff);
70 }
71 
72 /* xd_t field extraction */
lengthPXD(pxd_t * pxd)73 static inline __u32 lengthPXD(pxd_t *pxd)
74 {
75 	return le32_to_cpu((pxd)->len_addr) & 0xffffff;
76 }
77 
addressPXD(pxd_t * pxd)78 static inline __u64 addressPXD(pxd_t *pxd)
79 {
80 	__u64 n = le32_to_cpu(pxd->len_addr) & ~0xffffff;
81 	return (n << 8) + le32_to_cpu(pxd->addr2);
82 }
83 
84 #define MAXTREEHEIGHT 8
85 /* pxd list */
86 struct pxdlist {
87 	s16 maxnpxd;
88 	s16 npxd;
89 	pxd_t pxd[MAXTREEHEIGHT];
90 };
91 
92 
93 /*
94  *	data extent descriptor (dxd)
95  */
96 typedef struct {
97 	__u8 flag;	/* 1: flags */
98 	__u8 rsrvd[3];
99 	__le32 size;		/* 4: size in byte */
100 	pxd_t loc;		/* 8: address and length in unit of fsblksize */
101 } dxd_t;			/* - 16 - */
102 
103 /* dxd_t flags */
104 #define	DXD_INDEX	0x80	/* B+-tree index */
105 #define	DXD_INLINE	0x40	/* in-line data extent */
106 #define	DXD_EXTENT	0x20	/* out-of-line single extent */
107 #define	DXD_FILE	0x10	/* out-of-line file (inode) */
108 #define DXD_CORRUPT	0x08	/* Inconsistency detected */
109 
110 /* dxd_t field construction
111  */
112 #define	DXDlength(dxd, len)	PXDlength(&(dxd)->loc, len)
113 #define	DXDaddress(dxd, addr)	PXDaddress(&(dxd)->loc, addr)
114 #define	lengthDXD(dxd)	lengthPXD(&(dxd)->loc)
115 #define	addressDXD(dxd)	addressPXD(&(dxd)->loc)
116 #define DXDsize(dxd, size32) ((dxd)->size = cpu_to_le32(size32))
117 #define sizeDXD(dxd)	le32_to_cpu((dxd)->size)
118 
119 /*
120  *	directory entry argument
121  */
122 struct component_name {
123 	int namlen;
124 	wchar_t *name;
125 };
126 
127 
128 /*
129  *	DASD limit information - stored in directory inode
130  */
131 struct dasd {
132 	u8 thresh;		/* Alert Threshold (in percent)		*/
133 	u8 delta;		/* Alert Threshold delta (in percent)	*/
134 	u8 rsrvd1;
135 	u8 limit_hi;		/* DASD limit (in logical blocks)	*/
136 	__le32 limit_lo;	/* DASD limit (in logical blocks)	*/
137 	u8 rsrvd2[3];
138 	u8 used_hi;		/* DASD usage (in logical blocks)	*/
139 	__le32 used_lo;		/* DASD usage (in logical blocks)	*/
140 };
141 
142 #define DASDLIMIT(dasdp) \
143 	(((u64)((dasdp)->limit_hi) << 32) + __le32_to_cpu((dasdp)->limit_lo))
144 #define setDASDLIMIT(dasdp, limit)\
145 {\
146 	(dasdp)->limit_hi = ((u64)limit) >> 32;\
147 	(dasdp)->limit_lo = __cpu_to_le32(limit);\
148 }
149 #define DASDUSED(dasdp) \
150 	(((u64)((dasdp)->used_hi) << 32) + __le32_to_cpu((dasdp)->used_lo))
151 #define setDASDUSED(dasdp, used)\
152 {\
153 	(dasdp)->used_hi = ((u64)used) >> 32;\
154 	(dasdp)->used_lo = __cpu_to_le32(used);\
155 }
156 
157 #endif				/* !_H_JFS_TYPES */
158