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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 | /* SPDX-License-Identifier: GPL-2.0-or-later */ /* * Copyright (C) International Business Machines Corp., 2000-2002 */ #ifndef _H_JFS_XTREE #define _H_JFS_XTREE /* * jfs_xtree.h: extent allocation descriptor B+-tree manager */ #include "jfs_btree.h" /* * extent allocation descriptor (xad) */ typedef struct xad { __u8 flag; /* 1: flag */ __u8 rsvrd[2]; /* 2: reserved */ __u8 off1; /* 1: offset in unit of fsblksize */ __le32 off2; /* 4: offset in unit of fsblksize */ pxd_t loc; /* 8: length and address in unit of fsblksize */ } xad_t; /* (16) */ #define MAXXLEN ((1 << 24) - 1) #define XTSLOTSIZE 16 #define L2XTSLOTSIZE 4 /* xad_t field construction */ #define XADoffset(xad, offset64)\ {\ (xad)->off1 = ((u64)offset64) >> 32;\ (xad)->off2 = __cpu_to_le32((offset64) & 0xffffffff);\ } #define XADaddress(xad, address64) PXDaddress(&(xad)->loc, address64) #define XADlength(xad, length32) PXDlength(&(xad)->loc, length32) /* xad_t field extraction */ #define offsetXAD(xad)\ ( ((s64)((xad)->off1)) << 32 | __le32_to_cpu((xad)->off2)) #define addressXAD(xad) addressPXD(&(xad)->loc) #define lengthXAD(xad) lengthPXD(&(xad)->loc) /* xad list */ struct xadlist { s16 maxnxad; s16 nxad; xad_t *xad; }; /* xad_t flags */ #define XAD_NEW 0x01 /* new */ #define XAD_EXTENDED 0x02 /* extended */ #define XAD_COMPRESSED 0x04 /* compressed with recorded length */ #define XAD_NOTRECORDED 0x08 /* allocated but not recorded */ #define XAD_COW 0x10 /* copy-on-write */ /* possible values for maxentry */ #define XTROOTINITSLOT_DIR 6 #define XTROOTINITSLOT 10 #define XTROOTMAXSLOT 18 #define XTPAGEMAXSLOT 256 #define XTENTRYSTART 2 struct xtheader { __le64 next; /* 8: */ __le64 prev; /* 8: */ u8 flag; /* 1: */ u8 rsrvd1; /* 1: */ __le16 nextindex; /* 2: next index = number of entries */ __le16 maxentry; /* 2: max number of entries */ __le16 rsrvd2; /* 2: */ pxd_t self; /* 8: self */ }; /* * xtree root (in inode): */ typedef union { struct xtheader header; xad_t xad[XTROOTMAXSLOT]; /* 16 * maxentry: xad array */ } xtroot_t; /* * xtree page: */ typedef union { struct xtheader header; xad_t xad[XTPAGEMAXSLOT]; /* 16 * maxentry: xad array */ } xtpage_t; /* * external declaration */ extern int xtLookup(struct inode *ip, s64 lstart, s64 llen, int *pflag, s64 * paddr, int *plen, int flag); extern void xtInitRoot(tid_t tid, struct inode *ip); extern int xtInsert(tid_t tid, struct inode *ip, int xflag, s64 xoff, int xlen, s64 * xaddrp, int flag); extern int xtExtend(tid_t tid, struct inode *ip, s64 xoff, int xlen, int flag); extern int xtUpdate(tid_t tid, struct inode *ip, struct xad *nxad); extern s64 xtTruncate(tid_t tid, struct inode *ip, s64 newsize, int type); extern s64 xtTruncate_pmap(tid_t tid, struct inode *ip, s64 committed_size); extern int xtAppend(tid_t tid, struct inode *ip, int xflag, s64 xoff, int maxblocks, int *xlenp, s64 * xaddrp, int flag); #endif /* !_H_JFS_XTREE */ |