/* SPDX-License-Identifier: GPL-2.0 */
|
/*
|
* Copyright (c) 2000-2006 Silicon Graphics, Inc.
|
* All Rights Reserved.
|
*/
|
#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 {
|
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 */
|
struct xfs_iext_cursor icur; /* incore extent cursor */
|
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 */
|
bool xefi_skip_discard;
|
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_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
|
|
/* Skip online discard of freed extents */
|
#define XFS_BMAPI_NODISCARD 0x1000
|
|
/* Do not update the rmap btree. Used for reconstructing bmbt from rmapbt. */
|
#define XFS_BMAPI_NORMAP 0x2000
|
|
#define XFS_BMAPI_FLAGS \
|
{ XFS_BMAPI_ENTIRE, "ENTIRE" }, \
|
{ XFS_BMAPI_METADATA, "METADATA" }, \
|
{ XFS_BMAPI_ATTRFORK, "ATTRFORK" }, \
|
{ XFS_BMAPI_PREALLOC, "PREALLOC" }, \
|
{ XFS_BMAPI_CONTIG, "CONTIG" }, \
|
{ XFS_BMAPI_CONVERT, "CONVERT" }, \
|
{ XFS_BMAPI_ZERO, "ZERO" }, \
|
{ XFS_BMAPI_REMAP, "REMAP" }, \
|
{ XFS_BMAPI_COWFORK, "COWFORK" }, \
|
{ XFS_BMAPI_NODISCARD, "NODISCARD" }, \
|
{ XFS_BMAPI_NORMAP, "NORMAP" }
|
|
|
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" }
|
|
/* Return true if the extent is an allocated extent, written or not. */
|
static inline bool xfs_bmap_is_real_extent(struct xfs_bmbt_irec *irec)
|
{
|
return irec->br_startblock != HOLESTARTBLOCK &&
|
irec->br_startblock != DELAYSTARTBLOCK &&
|
!isnullstartblock(irec->br_startblock);
|
}
|
|
/*
|
* Return true if the extent is a real, allocated extent, or false if it is a
|
* delayed allocation, and unwritten extent or a hole.
|
*/
|
static inline bool xfs_bmap_is_written_extent(struct xfs_bmbt_irec *irec)
|
{
|
return xfs_bmap_is_real_extent(irec) &&
|
irec->br_state != XFS_EXT_UNWRITTEN;
|
}
|
|
/*
|
* Check the mapping for obviously garbage allocations that could trash the
|
* filesystem immediately.
|
*/
|
#define xfs_valid_startblock(ip, startblock) \
|
((startblock) != 0 || XFS_IS_REALTIME_INODE(ip))
|
|
void xfs_trim_extent(struct xfs_bmbt_irec *irec, xfs_fileoff_t bno,
|
xfs_filblks_t len);
|
int xfs_bmap_add_attrfork(struct xfs_inode *ip, int size, int rsvd);
|
int xfs_bmap_set_attrforkoff(struct xfs_inode *ip, int size, int *version);
|
void xfs_bmap_local_to_extents_empty(struct xfs_trans *tp,
|
struct xfs_inode *ip, int whichfork);
|
void __xfs_bmap_add_free(struct xfs_trans *tp, xfs_fsblock_t bno,
|
xfs_filblks_t len, const struct xfs_owner_info *oinfo,
|
bool skip_discard);
|
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_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_extlen_t total, struct xfs_bmbt_irec *mval, int *nmap);
|
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);
|
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, int *done);
|
int xfs_bmap_del_extent_delay(struct xfs_inode *ip, int whichfork,
|
struct xfs_iext_cursor *cur, struct xfs_bmbt_irec *got,
|
struct xfs_bmbt_irec *del);
|
void xfs_bmap_del_extent_cow(struct xfs_inode *ip,
|
struct xfs_iext_cursor *cur, struct xfs_bmbt_irec *got,
|
struct xfs_bmbt_irec *del);
|
uint xfs_default_attroffset(struct xfs_inode *ip);
|
int xfs_bmap_collapse_extents(struct xfs_trans *tp, struct xfs_inode *ip,
|
xfs_fileoff_t *next_fsb, xfs_fileoff_t offset_shift_fsb,
|
bool *done);
|
int xfs_bmap_can_insert_extents(struct xfs_inode *ip, xfs_fileoff_t off,
|
xfs_fileoff_t shift);
|
int xfs_bmap_insert_extents(struct xfs_trans *tp, struct xfs_inode *ip,
|
xfs_fileoff_t *next_fsb, xfs_fileoff_t offset_shift_fsb,
|
bool *done, xfs_fileoff_t stop_fsb);
|
int xfs_bmap_split_extent(struct xfs_trans *tp, struct xfs_inode *ip,
|
xfs_fileoff_t split_offset);
|
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, struct xfs_iext_cursor *cur,
|
int eof);
|
int xfs_bmapi_convert_delalloc(struct xfs_inode *ip, int whichfork,
|
xfs_off_t offset, struct iomap *iomap, unsigned int *seq);
|
int xfs_bmap_add_extent_unwritten_real(struct xfs_trans *tp,
|
struct xfs_inode *ip, int whichfork,
|
struct xfs_iext_cursor *icur, struct xfs_btree_cur **curp,
|
struct xfs_bmbt_irec *new, int *logflagsp);
|
|
static inline void
|
xfs_bmap_add_free(
|
struct xfs_trans *tp,
|
xfs_fsblock_t bno,
|
xfs_filblks_t len,
|
const struct xfs_owner_info *oinfo)
|
{
|
__xfs_bmap_add_free(tp, bno, len, oinfo, false);
|
}
|
|
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_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);
|
void xfs_bmap_map_extent(struct xfs_trans *tp, struct xfs_inode *ip,
|
struct xfs_bmbt_irec *imap);
|
void xfs_bmap_unmap_extent(struct xfs_trans *tp, struct xfs_inode *ip,
|
struct xfs_bmbt_irec *imap);
|
|
static inline int xfs_bmap_fork_to_state(int whichfork)
|
{
|
switch (whichfork) {
|
case XFS_ATTR_FORK:
|
return BMAP_ATTRFORK;
|
case XFS_COW_FORK:
|
return BMAP_COWFORK;
|
default:
|
return 0;
|
}
|
}
|
|
xfs_failaddr_t xfs_bmap_validate_extent(struct xfs_inode *ip, int whichfork,
|
struct xfs_bmbt_irec *irec);
|
|
int xfs_bmapi_remap(struct xfs_trans *tp, struct xfs_inode *ip,
|
xfs_fileoff_t bno, xfs_filblks_t len, xfs_fsblock_t startblock,
|
int flags);
|
|
#endif /* __XFS_BMAP_H__ */
|
