diff options
Diffstat (limited to 'ANDROID_3.4.5/fs/xfs/xfs_bmap_btree.h')
| -rw-r--r-- | ANDROID_3.4.5/fs/xfs/xfs_bmap_btree.h | 240 |
1 files changed, 0 insertions, 240 deletions
diff --git a/ANDROID_3.4.5/fs/xfs/xfs_bmap_btree.h b/ANDROID_3.4.5/fs/xfs/xfs_bmap_btree.h deleted file mode 100644 index 0e66c4ea..00000000 --- a/ANDROID_3.4.5/fs/xfs/xfs_bmap_btree.h +++ /dev/null @@ -1,240 +0,0 @@ -/* - * Copyright (c) 2000,2002-2005 Silicon Graphics, Inc. - * All Rights Reserved. - * - * 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. - * - * This program is distributed in the hope that it would 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 the Free Software Foundation, - * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA - */ -#ifndef __XFS_BMAP_BTREE_H__ -#define __XFS_BMAP_BTREE_H__ - -#define XFS_BMAP_MAGIC 0x424d4150 /* 'BMAP' */ - -struct xfs_btree_cur; -struct xfs_btree_block; -struct xfs_mount; -struct xfs_inode; -struct xfs_trans; - -/* - * Bmap root header, on-disk form only. - */ -typedef struct xfs_bmdr_block { - __be16 bb_level; /* 0 is a leaf */ - __be16 bb_numrecs; /* current # of data records */ -} xfs_bmdr_block_t; - -/* - * Bmap btree record and extent descriptor. - * l0:63 is an extent flag (value 1 indicates non-normal). - * l0:9-62 are startoff. - * l0:0-8 and l1:21-63 are startblock. - * l1:0-20 are blockcount. - */ -#define BMBT_EXNTFLAG_BITLEN 1 -#define BMBT_STARTOFF_BITLEN 54 -#define BMBT_STARTBLOCK_BITLEN 52 -#define BMBT_BLOCKCOUNT_BITLEN 21 - -typedef struct xfs_bmbt_rec { - __be64 l0, l1; -} xfs_bmbt_rec_t; - -typedef __uint64_t xfs_bmbt_rec_base_t; /* use this for casts */ -typedef xfs_bmbt_rec_t xfs_bmdr_rec_t; - -typedef struct xfs_bmbt_rec_host { - __uint64_t l0, l1; -} xfs_bmbt_rec_host_t; - -/* - * Values and macros for delayed-allocation startblock fields. - */ -#define STARTBLOCKVALBITS 17 -#define STARTBLOCKMASKBITS (15 + XFS_BIG_BLKNOS * 20) -#define DSTARTBLOCKMASKBITS (15 + 20) -#define STARTBLOCKMASK \ - (((((xfs_fsblock_t)1) << STARTBLOCKMASKBITS) - 1) << STARTBLOCKVALBITS) -#define DSTARTBLOCKMASK \ - (((((xfs_dfsbno_t)1) << DSTARTBLOCKMASKBITS) - 1) << STARTBLOCKVALBITS) - -static inline int isnullstartblock(xfs_fsblock_t x) -{ - return ((x) & STARTBLOCKMASK) == STARTBLOCKMASK; -} - -static inline int isnulldstartblock(xfs_dfsbno_t x) -{ - return ((x) & DSTARTBLOCKMASK) == DSTARTBLOCKMASK; -} - -static inline xfs_fsblock_t nullstartblock(int k) -{ - ASSERT(k < (1 << STARTBLOCKVALBITS)); - return STARTBLOCKMASK | (k); -} - -static inline xfs_filblks_t startblockval(xfs_fsblock_t x) -{ - return (xfs_filblks_t)((x) & ~STARTBLOCKMASK); -} - -/* - * Possible extent formats. - */ -typedef enum { - XFS_EXTFMT_NOSTATE = 0, - XFS_EXTFMT_HASSTATE -} xfs_exntfmt_t; - -/* - * Possible extent states. - */ -typedef enum { - XFS_EXT_NORM, XFS_EXT_UNWRITTEN, - XFS_EXT_DMAPI_OFFLINE, XFS_EXT_INVALID -} xfs_exntst_t; - -/* - * Extent state and extent format macros. - */ -#define XFS_EXTFMT_INODE(x) \ - (xfs_sb_version_hasextflgbit(&((x)->i_mount->m_sb)) ? \ - XFS_EXTFMT_HASSTATE : XFS_EXTFMT_NOSTATE) -#define ISUNWRITTEN(x) ((x)->br_state == XFS_EXT_UNWRITTEN) - -/* - * Incore version of above. - */ -typedef struct xfs_bmbt_irec -{ - xfs_fileoff_t br_startoff; /* starting file offset */ - xfs_fsblock_t br_startblock; /* starting block number */ - xfs_filblks_t br_blockcount; /* number of blocks */ - xfs_exntst_t br_state; /* extent state */ -} xfs_bmbt_irec_t; - -/* - * Key structure for non-leaf levels of the tree. - */ -typedef struct xfs_bmbt_key { - __be64 br_startoff; /* starting file offset */ -} xfs_bmbt_key_t, xfs_bmdr_key_t; - -/* btree pointer type */ -typedef __be64 xfs_bmbt_ptr_t, xfs_bmdr_ptr_t; - -/* - * Btree block header size depends on a superblock flag. - * - * (not quite yet, but soon) - */ -#define XFS_BMBT_BLOCK_LEN(mp) XFS_BTREE_LBLOCK_LEN - -#define XFS_BMBT_REC_ADDR(mp, block, index) \ - ((xfs_bmbt_rec_t *) \ - ((char *)(block) + \ - XFS_BMBT_BLOCK_LEN(mp) + \ - ((index) - 1) * sizeof(xfs_bmbt_rec_t))) - -#define XFS_BMBT_KEY_ADDR(mp, block, index) \ - ((xfs_bmbt_key_t *) \ - ((char *)(block) + \ - XFS_BMBT_BLOCK_LEN(mp) + \ - ((index) - 1) * sizeof(xfs_bmbt_key_t))) - -#define XFS_BMBT_PTR_ADDR(mp, block, index, maxrecs) \ - ((xfs_bmbt_ptr_t *) \ - ((char *)(block) + \ - XFS_BMBT_BLOCK_LEN(mp) + \ - (maxrecs) * sizeof(xfs_bmbt_key_t) + \ - ((index) - 1) * sizeof(xfs_bmbt_ptr_t))) - -#define XFS_BMDR_REC_ADDR(block, index) \ - ((xfs_bmdr_rec_t *) \ - ((char *)(block) + \ - sizeof(struct xfs_bmdr_block) + \ - ((index) - 1) * sizeof(xfs_bmdr_rec_t))) - -#define XFS_BMDR_KEY_ADDR(block, index) \ - ((xfs_bmdr_key_t *) \ - ((char *)(block) + \ - sizeof(struct xfs_bmdr_block) + \ - ((index) - 1) * sizeof(xfs_bmdr_key_t))) - -#define XFS_BMDR_PTR_ADDR(block, index, maxrecs) \ - ((xfs_bmdr_ptr_t *) \ - ((char *)(block) + \ - sizeof(struct xfs_bmdr_block) + \ - (maxrecs) * sizeof(xfs_bmdr_key_t) + \ - ((index) - 1) * sizeof(xfs_bmdr_ptr_t))) - -/* - * These are to be used when we know the size of the block and - * we don't have a cursor. - */ -#define XFS_BMAP_BROOT_PTR_ADDR(mp, bb, i, sz) \ - XFS_BMBT_PTR_ADDR(mp, bb, i, xfs_bmbt_maxrecs(mp, sz, 0)) - -#define XFS_BMAP_BROOT_SPACE_CALC(nrecs) \ - (int)(XFS_BTREE_LBLOCK_LEN + \ - ((nrecs) * (sizeof(xfs_bmbt_key_t) + sizeof(xfs_bmbt_ptr_t)))) - -#define XFS_BMAP_BROOT_SPACE(bb) \ - (XFS_BMAP_BROOT_SPACE_CALC(be16_to_cpu((bb)->bb_numrecs))) -#define XFS_BMDR_SPACE_CALC(nrecs) \ - (int)(sizeof(xfs_bmdr_block_t) + \ - ((nrecs) * (sizeof(xfs_bmbt_key_t) + sizeof(xfs_bmbt_ptr_t)))) - -/* - * Maximum number of bmap btree levels. - */ -#define XFS_BM_MAXLEVELS(mp,w) ((mp)->m_bm_maxlevels[(w)]) - -/* - * Prototypes for xfs_bmap.c to call. - */ -extern void xfs_bmdr_to_bmbt(struct xfs_mount *, xfs_bmdr_block_t *, int, - struct xfs_btree_block *, int); -extern void xfs_bmbt_get_all(xfs_bmbt_rec_host_t *r, xfs_bmbt_irec_t *s); -extern xfs_filblks_t xfs_bmbt_get_blockcount(xfs_bmbt_rec_host_t *r); -extern xfs_fsblock_t xfs_bmbt_get_startblock(xfs_bmbt_rec_host_t *r); -extern xfs_fileoff_t xfs_bmbt_get_startoff(xfs_bmbt_rec_host_t *r); -extern xfs_exntst_t xfs_bmbt_get_state(xfs_bmbt_rec_host_t *r); - -extern xfs_filblks_t xfs_bmbt_disk_get_blockcount(xfs_bmbt_rec_t *r); -extern xfs_fileoff_t xfs_bmbt_disk_get_startoff(xfs_bmbt_rec_t *r); - -extern void xfs_bmbt_set_all(xfs_bmbt_rec_host_t *r, xfs_bmbt_irec_t *s); -extern void xfs_bmbt_set_allf(xfs_bmbt_rec_host_t *r, xfs_fileoff_t o, - xfs_fsblock_t b, xfs_filblks_t c, xfs_exntst_t v); -extern void xfs_bmbt_set_blockcount(xfs_bmbt_rec_host_t *r, xfs_filblks_t v); -extern void xfs_bmbt_set_startblock(xfs_bmbt_rec_host_t *r, xfs_fsblock_t v); -extern void xfs_bmbt_set_startoff(xfs_bmbt_rec_host_t *r, xfs_fileoff_t v); -extern void xfs_bmbt_set_state(xfs_bmbt_rec_host_t *r, xfs_exntst_t v); - -extern void xfs_bmbt_disk_set_allf(xfs_bmbt_rec_t *r, xfs_fileoff_t o, - xfs_fsblock_t b, xfs_filblks_t c, xfs_exntst_t v); - -extern void xfs_bmbt_to_bmdr(struct xfs_mount *, struct xfs_btree_block *, int, - xfs_bmdr_block_t *, int); - -extern int xfs_bmbt_get_maxrecs(struct xfs_btree_cur *, int level); -extern int xfs_bmdr_maxrecs(struct xfs_mount *, int blocklen, int leaf); -extern int xfs_bmbt_maxrecs(struct xfs_mount *, int blocklen, int leaf); - -extern struct xfs_btree_cur *xfs_bmbt_init_cursor(struct xfs_mount *, - struct xfs_trans *, struct xfs_inode *, int); - - -#endif /* __XFS_BMAP_BTREE_H__ */ |