mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-29 23:53:55 +08:00
5d77c0dc0c
Just minor housekeeping, a lot more functions can be trivially made static; others could if we reordered things a bit... Signed-off-by: Eric Sandeen <sandeen@sandeen.net> Signed-off-by: Alex Elder <aelder@sgi.com>
241 lines
7.1 KiB
C
241 lines
7.1 KiB
C
/*
|
|
* 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__ */
|