forked from Minki/linux
8801bb99e4
incore users. SGI-PV: 954580 SGI-Modid: xfs-linux-melb:xfs-kern:26561a Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Nathan Scott <nathans@sgi.com> Signed-off-by: Tim Shimmin <tes@sgi.com>
379 lines
13 KiB
C
379 lines
13 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_lblock;
|
|
struct xfs_mount;
|
|
struct xfs_inode;
|
|
|
|
/*
|
|
* 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.
|
|
* For 32-bit kernels,
|
|
* l0:31 is an extent flag (value 1 indicates non-normal).
|
|
* l0:0-30 and l1:9-31 are startoff.
|
|
* l1:0-8, l2:0-31, and l3:21-31 are startblock.
|
|
* l3:0-20 are blockcount.
|
|
* For 64-bit kernels,
|
|
* 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.
|
|
*/
|
|
|
|
#ifndef XFS_NATIVE_HOST
|
|
|
|
#define BMBT_TOTAL_BITLEN 128 /* 128 bits, 16 bytes */
|
|
#define BMBT_EXNTFLAG_BITOFF 0
|
|
#define BMBT_EXNTFLAG_BITLEN 1
|
|
#define BMBT_STARTOFF_BITOFF (BMBT_EXNTFLAG_BITOFF + BMBT_EXNTFLAG_BITLEN)
|
|
#define BMBT_STARTOFF_BITLEN 54
|
|
#define BMBT_STARTBLOCK_BITOFF (BMBT_STARTOFF_BITOFF + BMBT_STARTOFF_BITLEN)
|
|
#define BMBT_STARTBLOCK_BITLEN 52
|
|
#define BMBT_BLOCKCOUNT_BITOFF \
|
|
(BMBT_STARTBLOCK_BITOFF + BMBT_STARTBLOCK_BITLEN)
|
|
#define BMBT_BLOCKCOUNT_BITLEN (BMBT_TOTAL_BITLEN - BMBT_BLOCKCOUNT_BITOFF)
|
|
|
|
#else
|
|
|
|
#define BMBT_TOTAL_BITLEN 128 /* 128 bits, 16 bytes */
|
|
#define BMBT_EXNTFLAG_BITOFF 63
|
|
#define BMBT_EXNTFLAG_BITLEN 1
|
|
#define BMBT_STARTOFF_BITOFF (BMBT_EXNTFLAG_BITOFF - BMBT_STARTOFF_BITLEN)
|
|
#define BMBT_STARTOFF_BITLEN 54
|
|
#define BMBT_STARTBLOCK_BITOFF 85 /* 128 - 43 (other 9 is in first word) */
|
|
#define BMBT_STARTBLOCK_BITLEN 52
|
|
#define BMBT_BLOCKCOUNT_BITOFF 64 /* Start of second 64 bit container */
|
|
#define BMBT_BLOCKCOUNT_BITLEN 21
|
|
|
|
#endif /* XFS_NATIVE_HOST */
|
|
|
|
|
|
#define BMBT_USE_64 1
|
|
|
|
typedef struct xfs_bmbt_rec_32
|
|
{
|
|
__uint32_t l0, l1, l2, l3;
|
|
} xfs_bmbt_rec_32_t;
|
|
typedef struct xfs_bmbt_rec_64
|
|
{
|
|
__uint64_t l0, l1;
|
|
} xfs_bmbt_rec_64_t;
|
|
|
|
typedef __uint64_t xfs_bmbt_rec_base_t; /* use this for casts */
|
|
typedef xfs_bmbt_rec_64_t xfs_bmbt_rec_t, xfs_bmdr_rec_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)
|
|
|
|
#define ISNULLSTARTBLOCK(x) isnullstartblock(x)
|
|
static inline int isnullstartblock(xfs_fsblock_t x)
|
|
{
|
|
return ((x) & STARTBLOCKMASK) == STARTBLOCKMASK;
|
|
}
|
|
|
|
#define ISNULLDSTARTBLOCK(x) isnulldstartblock(x)
|
|
static inline int isnulldstartblock(xfs_dfsbno_t x)
|
|
{
|
|
return ((x) & DSTARTBLOCKMASK) == DSTARTBLOCKMASK;
|
|
}
|
|
|
|
#define NULLSTARTBLOCK(k) nullstartblock(k)
|
|
static inline xfs_fsblock_t nullstartblock(int k)
|
|
{
|
|
ASSERT(k < (1 << STARTBLOCKVALBITS));
|
|
return STARTBLOCKMASK | (k);
|
|
}
|
|
|
|
#define STARTBLOCKVAL(x) startblockval(x)
|
|
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 type */
|
|
typedef struct xfs_btree_lblock xfs_bmbt_block_t;
|
|
|
|
#define XFS_BUF_TO_BMBT_BLOCK(bp) ((xfs_bmbt_block_t *)XFS_BUF_PTR(bp))
|
|
|
|
#define XFS_BMAP_IBLOCK_SIZE(lev,cur) (1 << (cur)->bc_blocklog)
|
|
#define XFS_BMAP_RBLOCK_DSIZE(lev,cur) ((cur)->bc_private.b.forksize)
|
|
#define XFS_BMAP_RBLOCK_ISIZE(lev,cur) \
|
|
((int)XFS_IFORK_PTR((cur)->bc_private.b.ip, \
|
|
(cur)->bc_private.b.whichfork)->if_broot_bytes)
|
|
|
|
#define XFS_BMAP_BLOCK_DSIZE(lev,cur) \
|
|
(((lev) == (cur)->bc_nlevels - 1 ? \
|
|
XFS_BMAP_RBLOCK_DSIZE(lev,cur) : XFS_BMAP_IBLOCK_SIZE(lev,cur)))
|
|
#define XFS_BMAP_BLOCK_ISIZE(lev,cur) \
|
|
(((lev) == (cur)->bc_nlevels - 1 ? \
|
|
XFS_BMAP_RBLOCK_ISIZE(lev,cur) : XFS_BMAP_IBLOCK_SIZE(lev,cur)))
|
|
|
|
#define XFS_BMAP_BLOCK_DMAXRECS(lev,cur) \
|
|
(((lev) == (cur)->bc_nlevels - 1 ? \
|
|
XFS_BTREE_BLOCK_MAXRECS(XFS_BMAP_RBLOCK_DSIZE(lev,cur), \
|
|
xfs_bmdr, (lev) == 0) : \
|
|
((cur)->bc_mp->m_bmap_dmxr[(lev) != 0])))
|
|
#define XFS_BMAP_BLOCK_IMAXRECS(lev,cur) \
|
|
(((lev) == (cur)->bc_nlevels - 1 ? \
|
|
XFS_BTREE_BLOCK_MAXRECS(XFS_BMAP_RBLOCK_ISIZE(lev,cur),\
|
|
xfs_bmbt, (lev) == 0) : \
|
|
((cur)->bc_mp->m_bmap_dmxr[(lev) != 0])))
|
|
|
|
#define XFS_BMAP_BLOCK_DMINRECS(lev,cur) \
|
|
(((lev) == (cur)->bc_nlevels - 1 ? \
|
|
XFS_BTREE_BLOCK_MINRECS(XFS_BMAP_RBLOCK_DSIZE(lev,cur),\
|
|
xfs_bmdr, (lev) == 0) : \
|
|
((cur)->bc_mp->m_bmap_dmnr[(lev) != 0])))
|
|
#define XFS_BMAP_BLOCK_IMINRECS(lev,cur) \
|
|
(((lev) == (cur)->bc_nlevels - 1 ? \
|
|
XFS_BTREE_BLOCK_MINRECS(XFS_BMAP_RBLOCK_ISIZE(lev,cur),\
|
|
xfs_bmbt, (lev) == 0) : \
|
|
((cur)->bc_mp->m_bmap_dmnr[(lev) != 0])))
|
|
|
|
#define XFS_BMAP_REC_DADDR(bb,i,cur) \
|
|
(XFS_BTREE_REC_ADDR(XFS_BMAP_BLOCK_DSIZE( \
|
|
be16_to_cpu((bb)->bb_level), cur), \
|
|
xfs_bmbt, bb, i, XFS_BMAP_BLOCK_DMAXRECS( \
|
|
be16_to_cpu((bb)->bb_level), cur)))
|
|
#define XFS_BMAP_REC_IADDR(bb,i,cur) \
|
|
(XFS_BTREE_REC_ADDR(XFS_BMAP_BLOCK_ISIZE( \
|
|
be16_to_cpu((bb)->bb_level), cur), \
|
|
xfs_bmbt, bb, i, XFS_BMAP_BLOCK_IMAXRECS( \
|
|
be16_to_cpu((bb)->bb_level), cur)))
|
|
|
|
#define XFS_BMAP_KEY_DADDR(bb,i,cur) \
|
|
(XFS_BTREE_KEY_ADDR(XFS_BMAP_BLOCK_DSIZE( \
|
|
be16_to_cpu((bb)->bb_level), cur), \
|
|
xfs_bmbt, bb, i, XFS_BMAP_BLOCK_DMAXRECS( \
|
|
be16_to_cpu((bb)->bb_level), cur)))
|
|
#define XFS_BMAP_KEY_IADDR(bb,i,cur) \
|
|
(XFS_BTREE_KEY_ADDR(XFS_BMAP_BLOCK_ISIZE( \
|
|
be16_to_cpu((bb)->bb_level), cur), \
|
|
xfs_bmbt, bb, i, XFS_BMAP_BLOCK_IMAXRECS( \
|
|
be16_to_cpu((bb)->bb_level), cur)))
|
|
|
|
#define XFS_BMAP_PTR_DADDR(bb,i,cur) \
|
|
(XFS_BTREE_PTR_ADDR(XFS_BMAP_BLOCK_DSIZE( \
|
|
be16_to_cpu((bb)->bb_level), cur), \
|
|
xfs_bmbt, bb, i, XFS_BMAP_BLOCK_DMAXRECS( \
|
|
be16_to_cpu((bb)->bb_level), cur)))
|
|
#define XFS_BMAP_PTR_IADDR(bb,i,cur) \
|
|
(XFS_BTREE_PTR_ADDR(XFS_BMAP_BLOCK_ISIZE( \
|
|
be16_to_cpu((bb)->bb_level), cur), \
|
|
xfs_bmbt, bb, i, XFS_BMAP_BLOCK_IMAXRECS( \
|
|
be16_to_cpu((bb)->bb_level), cur)))
|
|
|
|
/*
|
|
* These are to be used when we know the size of the block and
|
|
* we don't have a cursor.
|
|
*/
|
|
#define XFS_BMAP_BROOT_REC_ADDR(bb,i,sz) \
|
|
(XFS_BTREE_REC_ADDR(sz,xfs_bmbt,bb,i,XFS_BMAP_BROOT_MAXRECS(sz)))
|
|
#define XFS_BMAP_BROOT_KEY_ADDR(bb,i,sz) \
|
|
(XFS_BTREE_KEY_ADDR(sz,xfs_bmbt,bb,i,XFS_BMAP_BROOT_MAXRECS(sz)))
|
|
#define XFS_BMAP_BROOT_PTR_ADDR(bb,i,sz) \
|
|
(XFS_BTREE_PTR_ADDR(sz,xfs_bmbt,bb,i,XFS_BMAP_BROOT_MAXRECS(sz)))
|
|
|
|
#define XFS_BMAP_BROOT_NUMRECS(bb) be16_to_cpu((bb)->bb_numrecs)
|
|
#define XFS_BMAP_BROOT_MAXRECS(sz) XFS_BTREE_BLOCK_MAXRECS(sz,xfs_bmbt,0)
|
|
|
|
#define XFS_BMAP_BROOT_SPACE_CALC(nrecs) \
|
|
(int)(sizeof(xfs_bmbt_block_t) + \
|
|
((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)])
|
|
|
|
#define XFS_BMAP_SANITY_CHECK(mp,bb,level) \
|
|
(be32_to_cpu((bb)->bb_magic) == XFS_BMAP_MAGIC && \
|
|
be16_to_cpu((bb)->bb_level) == level && \
|
|
be16_to_cpu((bb)->bb_numrecs) > 0 && \
|
|
be16_to_cpu((bb)->bb_numrecs) <= (mp)->m_bmap_dmxr[(level) != 0])
|
|
|
|
|
|
#ifdef __KERNEL__
|
|
|
|
#if defined(XFS_BMBT_TRACE)
|
|
/*
|
|
* Trace buffer entry types.
|
|
*/
|
|
#define XFS_BMBT_KTRACE_ARGBI 1
|
|
#define XFS_BMBT_KTRACE_ARGBII 2
|
|
#define XFS_BMBT_KTRACE_ARGFFFI 3
|
|
#define XFS_BMBT_KTRACE_ARGI 4
|
|
#define XFS_BMBT_KTRACE_ARGIFK 5
|
|
#define XFS_BMBT_KTRACE_ARGIFR 6
|
|
#define XFS_BMBT_KTRACE_ARGIK 7
|
|
#define XFS_BMBT_KTRACE_CUR 8
|
|
|
|
#define XFS_BMBT_TRACE_SIZE 4096 /* size of global trace buffer */
|
|
#define XFS_BMBT_KTRACE_SIZE 32 /* size of per-inode trace buffer */
|
|
extern ktrace_t *xfs_bmbt_trace_buf;
|
|
#endif
|
|
|
|
/*
|
|
* Prototypes for xfs_bmap.c to call.
|
|
*/
|
|
extern void xfs_bmdr_to_bmbt(xfs_bmdr_block_t *, int, xfs_bmbt_block_t *, int);
|
|
extern int xfs_bmbt_decrement(struct xfs_btree_cur *, int, int *);
|
|
extern int xfs_bmbt_delete(struct xfs_btree_cur *, int *);
|
|
extern void xfs_bmbt_get_all(xfs_bmbt_rec_t *r, xfs_bmbt_irec_t *s);
|
|
extern xfs_bmbt_block_t *xfs_bmbt_get_block(struct xfs_btree_cur *cur,
|
|
int, struct xfs_buf **bpp);
|
|
extern xfs_filblks_t xfs_bmbt_get_blockcount(xfs_bmbt_rec_t *r);
|
|
extern xfs_fsblock_t xfs_bmbt_get_startblock(xfs_bmbt_rec_t *r);
|
|
extern xfs_fileoff_t xfs_bmbt_get_startoff(xfs_bmbt_rec_t *r);
|
|
extern xfs_exntst_t xfs_bmbt_get_state(xfs_bmbt_rec_t *r);
|
|
|
|
#ifndef XFS_NATIVE_HOST
|
|
extern void xfs_bmbt_disk_get_all(xfs_bmbt_rec_t *r, xfs_bmbt_irec_t *s);
|
|
extern xfs_exntst_t xfs_bmbt_disk_get_state(xfs_bmbt_rec_t *r);
|
|
extern xfs_filblks_t xfs_bmbt_disk_get_blockcount(xfs_bmbt_rec_t *r);
|
|
extern xfs_fsblock_t xfs_bmbt_disk_get_startblock(xfs_bmbt_rec_t *r);
|
|
extern xfs_fileoff_t xfs_bmbt_disk_get_startoff(xfs_bmbt_rec_t *r);
|
|
#else
|
|
#define xfs_bmbt_disk_get_all(r, s) xfs_bmbt_get_all(r, s)
|
|
#define xfs_bmbt_disk_get_state(r) xfs_bmbt_get_state(r)
|
|
#define xfs_bmbt_disk_get_blockcount(r) xfs_bmbt_get_blockcount(r)
|
|
#define xfs_bmbt_disk_get_startblock(r) xfs_bmbt_get_blockcount(r)
|
|
#define xfs_bmbt_disk_get_startoff(r) xfs_bmbt_get_startoff(r)
|
|
#endif /* XFS_NATIVE_HOST */
|
|
|
|
extern int xfs_bmbt_increment(struct xfs_btree_cur *, int, int *);
|
|
extern int xfs_bmbt_insert(struct xfs_btree_cur *, int *);
|
|
extern void xfs_bmbt_log_block(struct xfs_btree_cur *, struct xfs_buf *, int);
|
|
extern void xfs_bmbt_log_recs(struct xfs_btree_cur *, struct xfs_buf *, int,
|
|
int);
|
|
extern int xfs_bmbt_lookup_eq(struct xfs_btree_cur *, xfs_fileoff_t,
|
|
xfs_fsblock_t, xfs_filblks_t, int *);
|
|
extern int xfs_bmbt_lookup_ge(struct xfs_btree_cur *, xfs_fileoff_t,
|
|
xfs_fsblock_t, xfs_filblks_t, int *);
|
|
|
|
/*
|
|
* Give the bmap btree a new root block. Copy the old broot contents
|
|
* down into a real block and make the broot point to it.
|
|
*/
|
|
extern int xfs_bmbt_newroot(struct xfs_btree_cur *cur, int *lflags, int *stat);
|
|
|
|
extern void xfs_bmbt_set_all(xfs_bmbt_rec_t *r, xfs_bmbt_irec_t *s);
|
|
extern void xfs_bmbt_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_set_blockcount(xfs_bmbt_rec_t *r, xfs_filblks_t v);
|
|
extern void xfs_bmbt_set_startblock(xfs_bmbt_rec_t *r, xfs_fsblock_t v);
|
|
extern void xfs_bmbt_set_startoff(xfs_bmbt_rec_t *r, xfs_fileoff_t v);
|
|
extern void xfs_bmbt_set_state(xfs_bmbt_rec_t *r, xfs_exntst_t v);
|
|
|
|
#ifndef XFS_NATIVE_HOST
|
|
extern void xfs_bmbt_disk_set_all(xfs_bmbt_rec_t *r, xfs_bmbt_irec_t *s);
|
|
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);
|
|
#else
|
|
#define xfs_bmbt_disk_set_all(r, s) xfs_bmbt_set_all(r, s)
|
|
#define xfs_bmbt_disk_set_allf(r, o, b, c, v) xfs_bmbt_set_allf(r, o, b, c, v)
|
|
#endif /* XFS_NATIVE_HOST */
|
|
|
|
extern void xfs_bmbt_to_bmdr(xfs_bmbt_block_t *, int, xfs_bmdr_block_t *, int);
|
|
extern int xfs_bmbt_update(struct xfs_btree_cur *, xfs_fileoff_t,
|
|
xfs_fsblock_t, xfs_filblks_t, xfs_exntst_t);
|
|
|
|
#ifdef DEBUG
|
|
/*
|
|
* Get the data from the pointed-to record.
|
|
*/
|
|
extern int xfs_bmbt_get_rec(struct xfs_btree_cur *, xfs_fileoff_t *,
|
|
xfs_fsblock_t *, xfs_filblks_t *,
|
|
xfs_exntst_t *, int *);
|
|
#endif
|
|
|
|
#endif /* __KERNEL__ */
|
|
|
|
#endif /* __XFS_BMAP_BTREE_H__ */
|