mirror of
https://github.com/torvalds/linux.git
synced 2024-12-24 03:42:52 +00:00
32080a9b9b
Rebuild the reverse mapping btree from all primary metadata. This first patch establishes the bare mechanics of finding records and putting together a new ondisk tree; more complex pieces are needed to make it work properly. Link: Documentation/filesystems/xfs-online-fsck-design.rst Signed-off-by: Darrick J. Wong <djwong@kernel.org> Reviewed-by: Christoph Hellwig <hch@lst.de>
292 lines
10 KiB
C
292 lines
10 KiB
C
/* 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;
|
|
struct xfs_alloc_arg;
|
|
|
|
/*
|
|
* 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 */
|
|
uint32_t flags;
|
|
};
|
|
|
|
#define XFS_BMAP_MAX_NMAP 4
|
|
|
|
/*
|
|
* Flags for xfs_bmapi_*
|
|
*/
|
|
#define XFS_BMAPI_ENTIRE (1u << 0) /* return entire extent untrimmed */
|
|
#define XFS_BMAPI_METADATA (1u << 1) /* mapping metadata not user data */
|
|
#define XFS_BMAPI_ATTRFORK (1u << 2) /* use attribute fork not data */
|
|
#define XFS_BMAPI_PREALLOC (1u << 3) /* preallocating unwritten space */
|
|
#define XFS_BMAPI_CONTIG (1u << 4) /* 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 (1u << 5)
|
|
|
|
/*
|
|
* 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 (1u << 6)
|
|
|
|
/*
|
|
* 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 (1u << 7)
|
|
|
|
/* Map something in the CoW fork. */
|
|
#define XFS_BMAPI_COWFORK (1u << 8)
|
|
|
|
/* Skip online discard of freed extents */
|
|
#define XFS_BMAPI_NODISCARD (1u << 9)
|
|
|
|
/* Do not update the rmap btree. Used for reconstructing bmbt from rmapbt. */
|
|
#define XFS_BMAPI_NORMAP (1u << 10)
|
|
|
|
#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(uint32_t 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;
|
|
}
|
|
|
|
void xfs_bmap_alloc_account(struct xfs_bmalloca *ap);
|
|
|
|
/*
|
|
* 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 (1u << 0)
|
|
#define BMAP_RIGHT_CONTIG (1u << 1)
|
|
#define BMAP_LEFT_FILLING (1u << 2)
|
|
#define BMAP_RIGHT_FILLING (1u << 3)
|
|
#define BMAP_LEFT_DELAY (1u << 4)
|
|
#define BMAP_RIGHT_DELAY (1u << 5)
|
|
#define BMAP_LEFT_VALID (1u << 6)
|
|
#define BMAP_RIGHT_VALID (1u << 7)
|
|
#define BMAP_ATTRFORK (1u << 8)
|
|
#define BMAP_COWFORK (1u << 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(const 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))
|
|
|
|
int xfs_bmap_longest_free_extent(struct xfs_perag *pag,
|
|
struct xfs_trans *tp, xfs_extlen_t *blen);
|
|
void xfs_trim_extent(struct xfs_bmbt_irec *irec, xfs_fileoff_t bno,
|
|
xfs_filblks_t len);
|
|
unsigned int xfs_bmap_compute_attr_offset(struct xfs_mount *mp);
|
|
int xfs_bmap_add_attrfork(struct xfs_inode *ip, int size, int rsvd);
|
|
void xfs_bmap_local_to_extents_empty(struct xfs_trans *tp,
|
|
struct xfs_inode *ip, int whichfork);
|
|
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_bmapi_read(struct xfs_inode *ip, xfs_fileoff_t bno,
|
|
xfs_filblks_t len, struct xfs_bmbt_irec *mval,
|
|
int *nmap, uint32_t flags);
|
|
int xfs_bmapi_write(struct xfs_trans *tp, struct xfs_inode *ip,
|
|
xfs_fileoff_t bno, xfs_filblks_t len, uint32_t 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 len, uint32_t 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);
|
|
xfs_extlen_t xfs_bmapi_minleft(struct xfs_trans *tp, struct xfs_inode *ip,
|
|
int fork);
|
|
int xfs_bmap_btalloc_low_space(struct xfs_bmalloca *ap,
|
|
struct xfs_alloc_arg *args);
|
|
|
|
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;
|
|
int bi_whichfork;
|
|
struct xfs_inode *bi_owner;
|
|
struct xfs_perag *bi_pag;
|
|
struct xfs_bmbt_irec bi_bmap;
|
|
};
|
|
|
|
void xfs_bmap_update_get_group(struct xfs_mount *mp,
|
|
struct xfs_bmap_intent *bi);
|
|
|
|
int xfs_bmap_finish_one(struct xfs_trans *tp, struct xfs_bmap_intent *bi);
|
|
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 uint32_t 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_raw(struct xfs_mount *mp, bool rtfile,
|
|
int whichfork, struct xfs_bmbt_irec *irec);
|
|
xfs_failaddr_t xfs_bmap_validate_extent(struct xfs_inode *ip, int whichfork,
|
|
struct xfs_bmbt_irec *irec);
|
|
int xfs_bmap_complain_bad_rec(struct xfs_inode *ip, int whichfork,
|
|
xfs_failaddr_t fa, const 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,
|
|
uint32_t flags);
|
|
int xfs_bunmapi_range(struct xfs_trans **tpp, struct xfs_inode *ip,
|
|
uint32_t flags, xfs_fileoff_t startoff, xfs_fileoff_t endoff);
|
|
|
|
extern struct kmem_cache *xfs_bmap_intent_cache;
|
|
|
|
int __init xfs_bmap_intent_init_cache(void);
|
|
void xfs_bmap_intent_destroy_cache(void);
|
|
|
|
typedef int (*xfs_bmap_query_range_fn)(
|
|
struct xfs_btree_cur *cur,
|
|
struct xfs_bmbt_irec *rec,
|
|
void *priv);
|
|
|
|
int xfs_bmap_query_all(struct xfs_btree_cur *cur, xfs_bmap_query_range_fn fn,
|
|
void *priv);
|
|
|
|
#endif /* __XFS_BMAP_H__ */
|