276 lines
9.8 KiB
C
276 lines
9.8 KiB
C
|
/*
|
||
|
|
* Copyright (c) 2000-2006 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_H__
|
||
|
|
#define __XFS_BMAP_H__
|
||
|
|
|
||
|
|
struct getbmap;
|
||
|
|
struct xfs_bmbt_irec;
|
||
|
|
struct xfs_ifork;
|
||
|
|
struct xfs_inode;
|
||
|
|
struct xfs_mount;
|
||
|
|
struct xfs_trans;
|
||
|
|
|
||
|
|
extern kmem_zone_t *xfs_bmap_free_item_zone;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Argument structure for xfs_bmap_alloc.
|
||
|
|
*/
|
||
|
|
struct xfs_bmalloca {
|
||
|
|
xfs_fsblock_t *firstblock; /* i/o first block allocated */
|
||
|
|
struct xfs_defer_ops *dfops; /* bmap freelist */
|
||
|
|
struct xfs_trans *tp; /* transaction pointer */
|
||
|
|
struct xfs_inode *ip; /* incore inode pointer */
|
||
|
|
struct xfs_bmbt_irec prev; /* extent before the new one */
|
||
|
|
struct xfs_bmbt_irec got; /* extent after, or delayed */
|
||
|
|
|
||
|
|
xfs_fileoff_t offset; /* offset in file filling in */
|
||
|
|
xfs_extlen_t length; /* i/o length asked/allocated */
|
||
|
|
xfs_fsblock_t blkno; /* starting block of new extent */
|
||
|
|
|
||
|
|
struct xfs_btree_cur *cur; /* btree cursor */
|
||
|
|
xfs_extnum_t idx; /* current extent index */
|
||
|
|
int nallocs;/* number of extents alloc'd */
|
||
|
|
int logflags;/* flags for transaction logging */
|
||
|
|
|
||
|
|
xfs_extlen_t total; /* total blocks needed for xaction */
|
||
|
|
xfs_extlen_t minlen; /* minimum allocation size (blocks) */
|
||
|
|
xfs_extlen_t minleft; /* amount must be left after alloc */
|
||
|
|
bool eof; /* set if allocating past last extent */
|
||
|
|
bool wasdel; /* replacing a delayed allocation */
|
||
|
|
bool aeof; /* allocated space at eof */
|
||
|
|
bool conv; /* overwriting unwritten extents */
|
||
|
|
int datatype;/* data type being allocated */
|
||
|
|
int flags;
|
||
|
|
};
|
||
|
|
|
||
|
|
/*
|
||
|
|
* List of extents to be free "later".
|
||
|
|
* The list is kept sorted on xbf_startblock.
|
||
|
|
*/
|
||
|
|
struct xfs_extent_free_item
|
||
|
|
{
|
||
|
|
xfs_fsblock_t xefi_startblock;/* starting fs block number */
|
||
|
|
xfs_extlen_t xefi_blockcount;/* number of blocks in extent */
|
||
|
|
struct list_head xefi_list;
|
||
|
|
struct xfs_owner_info xefi_oinfo; /* extent owner */
|
||
|
|
};
|
||
|
|
|
||
|
|
#define XFS_BMAP_MAX_NMAP 4
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Flags for xfs_bmapi_*
|
||
|
|
*/
|
||
|
|
#define XFS_BMAPI_ENTIRE 0x001 /* return entire extent, not trimmed */
|
||
|
|
#define XFS_BMAPI_METADATA 0x002 /* mapping metadata not user data */
|
||
|
|
#define XFS_BMAPI_ATTRFORK 0x004 /* use attribute fork not data */
|
||
|
|
#define XFS_BMAPI_PREALLOC 0x008 /* preallocation op: unwritten space */
|
||
|
|
#define XFS_BMAPI_IGSTATE 0x010 /* Ignore state - */
|
||
|
|
/* combine contig. space */
|
||
|
|
#define XFS_BMAPI_CONTIG 0x020 /* must allocate only one extent */
|
||
|
|
/*
|
||
|
|
* unwritten extent conversion - this needs write cache flushing and no additional
|
||
|
|
* allocation alignments. When specified with XFS_BMAPI_PREALLOC it converts
|
||
|
|
* from written to unwritten, otherwise convert from unwritten to written.
|
||
|
|
*/
|
||
|
|
#define XFS_BMAPI_CONVERT 0x040
|
||
|
|
|
||
|
|
/*
|
||
|
|
* allocate zeroed extents - this requires all newly allocated user data extents
|
||
|
|
* to be initialised to zero. It will be ignored if XFS_BMAPI_METADATA is set.
|
||
|
|
* Use in conjunction with XFS_BMAPI_CONVERT to convert unwritten extents found
|
||
|
|
* during the allocation range to zeroed written extents.
|
||
|
|
*/
|
||
|
|
#define XFS_BMAPI_ZERO 0x080
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Map the inode offset to the block given in ap->firstblock. Primarily
|
||
|
|
* used for reflink. The range must be in a hole, and this flag cannot be
|
||
|
|
* turned on with PREALLOC or CONVERT, and cannot be used on the attr fork.
|
||
|
|
*
|
||
|
|
* For bunmapi, this flag unmaps the range without adjusting quota, reducing
|
||
|
|
* refcount, or freeing the blocks.
|
||
|
|
*/
|
||
|
|
#define XFS_BMAPI_REMAP 0x100
|
||
|
|
|
||
|
|
/* Map something in the CoW fork. */
|
||
|
|
#define XFS_BMAPI_COWFORK 0x200
|
||
|
|
|
||
|
|
/* Only convert delalloc space, don't allocate entirely new extents */
|
||
|
|
#define XFS_BMAPI_DELALLOC 0x400
|
||
|
|
|
||
|
|
#define XFS_BMAPI_FLAGS \
|
||
|
|
{ XFS_BMAPI_ENTIRE, "ENTIRE" }, \
|
||
|
|
{ XFS_BMAPI_METADATA, "METADATA" }, \
|
||
|
|
{ XFS_BMAPI_ATTRFORK, "ATTRFORK" }, \
|
||
|
|
{ XFS_BMAPI_PREALLOC, "PREALLOC" }, \
|
||
|
|
{ XFS_BMAPI_IGSTATE, "IGSTATE" }, \
|
||
|
|
{ XFS_BMAPI_CONTIG, "CONTIG" }, \
|
||
|
|
{ XFS_BMAPI_CONVERT, "CONVERT" }, \
|
||
|
|
{ XFS_BMAPI_ZERO, "ZERO" }, \
|
||
|
|
{ XFS_BMAPI_REMAP, "REMAP" }, \
|
||
|
|
{ XFS_BMAPI_COWFORK, "COWFORK" }, \
|
||
|
|
{ XFS_BMAPI_DELALLOC, "DELALLOC" }
|
||
|
|
|
||
|
|
|
||
|
|
static inline int xfs_bmapi_aflag(int w)
|
||
|
|
{
|
||
|
|
return (w == XFS_ATTR_FORK ? XFS_BMAPI_ATTRFORK :
|
||
|
|
(w == XFS_COW_FORK ? XFS_BMAPI_COWFORK : 0));
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline int xfs_bmapi_whichfork(int bmapi_flags)
|
||
|
|
{
|
||
|
|
if (bmapi_flags & XFS_BMAPI_COWFORK)
|
||
|
|
return XFS_COW_FORK;
|
||
|
|
else if (bmapi_flags & XFS_BMAPI_ATTRFORK)
|
||
|
|
return XFS_ATTR_FORK;
|
||
|
|
return XFS_DATA_FORK;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Special values for xfs_bmbt_irec_t br_startblock field.
|
||
|
|
*/
|
||
|
|
#define DELAYSTARTBLOCK ((xfs_fsblock_t)-1LL)
|
||
|
|
#define HOLESTARTBLOCK ((xfs_fsblock_t)-2LL)
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Flags for xfs_bmap_add_extent*.
|
||
|
|
*/
|
||
|
|
#define BMAP_LEFT_CONTIG (1 << 0)
|
||
|
|
#define BMAP_RIGHT_CONTIG (1 << 1)
|
||
|
|
#define BMAP_LEFT_FILLING (1 << 2)
|
||
|
|
#define BMAP_RIGHT_FILLING (1 << 3)
|
||
|
|
#define BMAP_LEFT_DELAY (1 << 4)
|
||
|
|
#define BMAP_RIGHT_DELAY (1 << 5)
|
||
|
|
#define BMAP_LEFT_VALID (1 << 6)
|
||
|
|
#define BMAP_RIGHT_VALID (1 << 7)
|
||
|
|
#define BMAP_ATTRFORK (1 << 8)
|
||
|
|
#define BMAP_COWFORK (1 << 9)
|
||
|
|
|
||
|
|
#define XFS_BMAP_EXT_FLAGS \
|
||
|
|
{ BMAP_LEFT_CONTIG, "LC" }, \
|
||
|
|
{ BMAP_RIGHT_CONTIG, "RC" }, \
|
||
|
|
{ BMAP_LEFT_FILLING, "LF" }, \
|
||
|
|
{ BMAP_RIGHT_FILLING, "RF" }, \
|
||
|
|
{ BMAP_ATTRFORK, "ATTR" }, \
|
||
|
|
{ BMAP_COWFORK, "COW" }
|
||
|
|
|
||
|
|
|
||
|
|
/*
|
||
|
|
* This macro is used to determine how many extents will be shifted
|
||
|
|
* in one write transaction. We could require two splits,
|
||
|
|
* an extent move on the first and an extent merge on the second,
|
||
|
|
* So it is proper that one extent is shifted inside write transaction
|
||
|
|
* at a time.
|
||
|
|
*/
|
||
|
|
#define XFS_BMAP_MAX_SHIFT_EXTENTS 1
|
||
|
|
|
||
|
|
enum shift_direction {
|
||
|
|
SHIFT_LEFT = 0,
|
||
|
|
SHIFT_RIGHT,
|
||
|
|
};
|
||
|
|
|
||
|
|
#ifdef DEBUG
|
||
|
|
void xfs_bmap_trace_exlist(struct xfs_inode *ip, xfs_extnum_t cnt,
|
||
|
|
int whichfork, unsigned long caller_ip);
|
||
|
|
#define XFS_BMAP_TRACE_EXLIST(ip,c,w) \
|
||
|
|
xfs_bmap_trace_exlist(ip,c,w, _THIS_IP_)
|
||
|
|
#else
|
||
|
|
#define XFS_BMAP_TRACE_EXLIST(ip,c,w)
|
||
|
|
#endif
|
||
|
|
|
||
|
|
void xfs_trim_extent(struct xfs_bmbt_irec *irec, xfs_fileoff_t bno,
|
||
|
|
xfs_filblks_t len);
|
||
|
|
void xfs_trim_extent_eof(struct xfs_bmbt_irec *, struct xfs_inode *);
|
||
|
|
int xfs_bmap_add_attrfork(struct xfs_inode *ip, int size, int rsvd);
|
||
|
|
void xfs_bmap_local_to_extents_empty(struct xfs_inode *ip, int whichfork);
|
||
|
|
void xfs_bmap_add_free(struct xfs_mount *mp, struct xfs_defer_ops *dfops,
|
||
|
|
xfs_fsblock_t bno, xfs_filblks_t len,
|
||
|
|
struct xfs_owner_info *oinfo);
|
||
|
|
void xfs_bmap_compute_maxlevels(struct xfs_mount *mp, int whichfork);
|
||
|
|
int xfs_bmap_first_unused(struct xfs_trans *tp, struct xfs_inode *ip,
|
||
|
|
xfs_extlen_t len, xfs_fileoff_t *unused, int whichfork);
|
||
|
|
int xfs_bmap_last_before(struct xfs_trans *tp, struct xfs_inode *ip,
|
||
|
|
xfs_fileoff_t *last_block, int whichfork);
|
||
|
|
int xfs_bmap_last_offset(struct xfs_inode *ip, xfs_fileoff_t *unused,
|
||
|
|
int whichfork);
|
||
|
|
int xfs_bmap_one_block(struct xfs_inode *ip, int whichfork);
|
||
|
|
int xfs_bmap_read_extents(struct xfs_trans *tp, struct xfs_inode *ip,
|
||
|
|
int whichfork);
|
||
|
|
int xfs_bmapi_read(struct xfs_inode *ip, xfs_fileoff_t bno,
|
||
|
|
xfs_filblks_t len, struct xfs_bmbt_irec *mval,
|
||
|
|
int *nmap, int flags);
|
||
|
|
int xfs_bmapi_write(struct xfs_trans *tp, struct xfs_inode *ip,
|
||
|
|
xfs_fileoff_t bno, xfs_filblks_t len, int flags,
|
||
|
|
xfs_fsblock_t *firstblock, xfs_extlen_t total,
|
||
|
|
struct xfs_bmbt_irec *mval, int *nmap,
|
||
|
|
struct xfs_defer_ops *dfops);
|
||
|
|
int __xfs_bunmapi(struct xfs_trans *tp, struct xfs_inode *ip,
|
||
|
|
xfs_fileoff_t bno, xfs_filblks_t *rlen, int flags,
|
||
|
|
xfs_extnum_t nexts, xfs_fsblock_t *firstblock,
|
||
|
|
struct xfs_defer_ops *dfops);
|
||
|
|
int xfs_bunmapi(struct xfs_trans *tp, struct xfs_inode *ip,
|
||
|
|
xfs_fileoff_t bno, xfs_filblks_t len, int flags,
|
||
|
|
xfs_extnum_t nexts, xfs_fsblock_t *firstblock,
|
||
|
|
struct xfs_defer_ops *dfops, int *done);
|
||
|
|
int xfs_bmap_del_extent_delay(struct xfs_inode *ip, int whichfork,
|
||
|
|
xfs_extnum_t *idx, struct xfs_bmbt_irec *got,
|
||
|
|
struct xfs_bmbt_irec *del);
|
||
|
|
void xfs_bmap_del_extent_cow(struct xfs_inode *ip, xfs_extnum_t *idx,
|
||
|
|
struct xfs_bmbt_irec *got, struct xfs_bmbt_irec *del);
|
||
|
|
int xfs_check_nostate_extents(struct xfs_ifork *ifp, xfs_extnum_t idx,
|
||
|
|
xfs_extnum_t num);
|
||
|
|
uint xfs_default_attroffset(struct xfs_inode *ip);
|
||
|
|
int xfs_bmap_shift_extents(struct xfs_trans *tp, struct xfs_inode *ip,
|
||
|
|
xfs_fileoff_t *next_fsb, xfs_fileoff_t offset_shift_fsb,
|
||
|
|
int *done, xfs_fileoff_t stop_fsb, xfs_fsblock_t *firstblock,
|
||
|
|
struct xfs_defer_ops *dfops, enum shift_direction direction,
|
||
|
|
int num_exts);
|
||
|
|
int xfs_bmap_split_extent(struct xfs_inode *ip, xfs_fileoff_t split_offset);
|
||
|
|
struct xfs_bmbt_rec_host *
|
||
|
|
xfs_bmap_search_extents(struct xfs_inode *ip, xfs_fileoff_t bno,
|
||
|
|
int fork, int *eofp, xfs_extnum_t *lastxp,
|
||
|
|
struct xfs_bmbt_irec *gotp, struct xfs_bmbt_irec *prevp);
|
||
|
|
int xfs_bmapi_reserve_delalloc(struct xfs_inode *ip, int whichfork,
|
||
|
|
xfs_fileoff_t off, xfs_filblks_t len, xfs_filblks_t prealloc,
|
||
|
|
struct xfs_bmbt_irec *got, xfs_extnum_t *lastx, int eof);
|
||
|
|
|
||
|
|
enum xfs_bmap_intent_type {
|
||
|
|
XFS_BMAP_MAP = 1,
|
||
|
|
XFS_BMAP_UNMAP,
|
||
|
|
};
|
||
|
|
|
||
|
|
struct xfs_bmap_intent {
|
||
|
|
struct list_head bi_list;
|
||
|
|
enum xfs_bmap_intent_type bi_type;
|
||
|
|
struct xfs_inode *bi_owner;
|
||
|
|
int bi_whichfork;
|
||
|
|
struct xfs_bmbt_irec bi_bmap;
|
||
|
|
};
|
||
|
|
|
||
|
|
int xfs_bmap_finish_one(struct xfs_trans *tp, struct xfs_defer_ops *dfops,
|
||
|
|
struct xfs_inode *ip, enum xfs_bmap_intent_type type,
|
||
|
|
int whichfork, xfs_fileoff_t startoff, xfs_fsblock_t startblock,
|
||
|
|
xfs_filblks_t *blockcount, xfs_exntst_t state);
|
||
|
|
int xfs_bmap_map_extent(struct xfs_mount *mp, struct xfs_defer_ops *dfops,
|
||
|
|
struct xfs_inode *ip, struct xfs_bmbt_irec *imap);
|
||
|
|
int xfs_bmap_unmap_extent(struct xfs_mount *mp, struct xfs_defer_ops *dfops,
|
||
|
|
struct xfs_inode *ip, struct xfs_bmbt_irec *imap);
|
||
|
|
|
||
|
|
#endif /* __XFS_BMAP_H__ */
|