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linux/fs/xfs/libxfs/xfs_rmap.h
Dave Chinner 0b61f8a407 xfs: convert to SPDX license tags 
Remove the verbose license text from XFS files and replace them
with SPDX tags. This does not change the license of any of the code,
merely refers to the common, up-to-date license files in LICENSES/

This change was mostly scripted. fs/xfs/Makefile and
fs/xfs/libxfs/xfs_fs.h were modified by hand, the rest were detected
and modified by the following command:

for f in `git grep -l "GNU General" fs/xfs/` ; do
	echo $f
	cat $f | awk -f hdr.awk > $f.new
	mv -f $f.new $f
done

And the hdr.awk script that did the modification (including
detecting the difference between GPL-2.0 and GPL-2.0+ licenses)
is as follows:

$ cat hdr.awk
BEGIN {
	hdr = 1.0
	tag = "GPL-2.0"
	str = ""
}

/^ \* This program is free software/ {
	hdr = 2.0;
	next
}

/any later version./ {
	tag = "GPL-2.0+"
	next
}

/^ \*\// {
	if (hdr > 0.0) {
		print "// SPDX-License-Identifier: " tag
		print str
		print $0
		str=""
		hdr = 0.0
		next
	}
	print $0
	next
}

/^ \* / {
	if (hdr > 1.0)
		next
	if (hdr > 0.0) {
		if (str != "")
			str = str "\n"
		str = str $0
		next
	}
	print $0
	next
}

/^ \*/ {
	if (hdr > 0.0)
		next
	print $0
	next
}

// {
	if (hdr > 0.0) {
		if (str != "")
			str = str "\n"
		str = str $0
		next
	}
	print $0
}

END { }
$

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2018-06-06 14:17:53 -07:00

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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2016 Oracle. All Rights Reserved.
* Author: Darrick J. Wong <darrick.wong@oracle.com>
*/
#ifndef __XFS_RMAP_H__
#define __XFS_RMAP_H__
static inline void
xfs_rmap_ag_owner(
struct xfs_owner_info *oi,
uint64_t owner)
{
oi->oi_owner = owner;
oi->oi_offset = 0;
oi->oi_flags = 0;
}
static inline void
xfs_rmap_ino_bmbt_owner(
struct xfs_owner_info *oi,
xfs_ino_t ino,
int whichfork)
{
oi->oi_owner = ino;
oi->oi_offset = 0;
oi->oi_flags = XFS_OWNER_INFO_BMBT_BLOCK;
if (whichfork == XFS_ATTR_FORK)
oi->oi_flags |= XFS_OWNER_INFO_ATTR_FORK;
}
static inline void
xfs_rmap_ino_owner(
struct xfs_owner_info *oi,
xfs_ino_t ino,
int whichfork,
xfs_fileoff_t offset)
{
oi->oi_owner = ino;
oi->oi_offset = offset;
oi->oi_flags = 0;
if (whichfork == XFS_ATTR_FORK)
oi->oi_flags |= XFS_OWNER_INFO_ATTR_FORK;
}
static inline void
xfs_rmap_skip_owner_update(
struct xfs_owner_info *oi)
{
xfs_rmap_ag_owner(oi, XFS_RMAP_OWN_NULL);
}
static inline bool
xfs_rmap_should_skip_owner_update(
struct xfs_owner_info *oi)
{
return oi->oi_owner == XFS_RMAP_OWN_NULL;
}
static inline void
xfs_rmap_any_owner_update(
struct xfs_owner_info *oi)
{
xfs_rmap_ag_owner(oi, XFS_RMAP_OWN_UNKNOWN);
}
/* Reverse mapping functions. */
struct xfs_buf;
static inline __u64
xfs_rmap_irec_offset_pack(
const struct xfs_rmap_irec *irec)
{
__u64 x;
x = XFS_RMAP_OFF(irec->rm_offset);
if (irec->rm_flags & XFS_RMAP_ATTR_FORK)
x |= XFS_RMAP_OFF_ATTR_FORK;
if (irec->rm_flags & XFS_RMAP_BMBT_BLOCK)
x |= XFS_RMAP_OFF_BMBT_BLOCK;
if (irec->rm_flags & XFS_RMAP_UNWRITTEN)
x |= XFS_RMAP_OFF_UNWRITTEN;
return x;
}
static inline int
xfs_rmap_irec_offset_unpack(
__u64 offset,
struct xfs_rmap_irec *irec)
{
if (offset & ~(XFS_RMAP_OFF_MASK | XFS_RMAP_OFF_FLAGS))
return -EFSCORRUPTED;
irec->rm_offset = XFS_RMAP_OFF(offset);
if (offset & XFS_RMAP_OFF_ATTR_FORK)
irec->rm_flags |= XFS_RMAP_ATTR_FORK;
if (offset & XFS_RMAP_OFF_BMBT_BLOCK)
irec->rm_flags |= XFS_RMAP_BMBT_BLOCK;
if (offset & XFS_RMAP_OFF_UNWRITTEN)
irec->rm_flags |= XFS_RMAP_UNWRITTEN;
return 0;
}
static inline void
xfs_owner_info_unpack(
struct xfs_owner_info *oinfo,
uint64_t *owner,
uint64_t *offset,
unsigned int *flags)
{
unsigned int r = 0;
*owner = oinfo->oi_owner;
*offset = oinfo->oi_offset;
if (oinfo->oi_flags & XFS_OWNER_INFO_ATTR_FORK)
r |= XFS_RMAP_ATTR_FORK;
if (oinfo->oi_flags & XFS_OWNER_INFO_BMBT_BLOCK)
r |= XFS_RMAP_BMBT_BLOCK;
*flags = r;
}
static inline void
xfs_owner_info_pack(
struct xfs_owner_info *oinfo,
uint64_t owner,
uint64_t offset,
unsigned int flags)
{
oinfo->oi_owner = owner;
oinfo->oi_offset = XFS_RMAP_OFF(offset);
oinfo->oi_flags = 0;
if (flags & XFS_RMAP_ATTR_FORK)
oinfo->oi_flags |= XFS_OWNER_INFO_ATTR_FORK;
if (flags & XFS_RMAP_BMBT_BLOCK)
oinfo->oi_flags |= XFS_OWNER_INFO_BMBT_BLOCK;
}
int xfs_rmap_alloc(struct xfs_trans *tp, struct xfs_buf *agbp,
xfs_agnumber_t agno, xfs_agblock_t bno, xfs_extlen_t len,
struct xfs_owner_info *oinfo);
int xfs_rmap_free(struct xfs_trans *tp, struct xfs_buf *agbp,
xfs_agnumber_t agno, xfs_agblock_t bno, xfs_extlen_t len,
struct xfs_owner_info *oinfo);
int xfs_rmap_lookup_le(struct xfs_btree_cur *cur, xfs_agblock_t bno,
xfs_extlen_t len, uint64_t owner, uint64_t offset,
unsigned int flags, int *stat);
int xfs_rmap_lookup_eq(struct xfs_btree_cur *cur, xfs_agblock_t bno,
xfs_extlen_t len, uint64_t owner, uint64_t offset,
unsigned int flags, int *stat);
int xfs_rmap_insert(struct xfs_btree_cur *rcur, xfs_agblock_t agbno,
xfs_extlen_t len, uint64_t owner, uint64_t offset,
unsigned int flags);
int xfs_rmap_get_rec(struct xfs_btree_cur *cur, struct xfs_rmap_irec *irec,
int *stat);
typedef int (*xfs_rmap_query_range_fn)(
struct xfs_btree_cur *cur,
struct xfs_rmap_irec *rec,
void *priv);
int xfs_rmap_query_range(struct xfs_btree_cur *cur,
struct xfs_rmap_irec *low_rec, struct xfs_rmap_irec *high_rec,
xfs_rmap_query_range_fn fn, void *priv);
int xfs_rmap_query_all(struct xfs_btree_cur *cur, xfs_rmap_query_range_fn fn,
void *priv);
enum xfs_rmap_intent_type {
XFS_RMAP_MAP,
XFS_RMAP_MAP_SHARED,
XFS_RMAP_UNMAP,
XFS_RMAP_UNMAP_SHARED,
XFS_RMAP_CONVERT,
XFS_RMAP_CONVERT_SHARED,
XFS_RMAP_ALLOC,
XFS_RMAP_FREE,
};
struct xfs_rmap_intent {
struct list_head ri_list;
enum xfs_rmap_intent_type ri_type;
uint64_t ri_owner;
int ri_whichfork;
struct xfs_bmbt_irec ri_bmap;
};
/* functions for updating the rmapbt based on bmbt map/unmap operations */
int xfs_rmap_map_extent(struct xfs_mount *mp, struct xfs_defer_ops *dfops,
struct xfs_inode *ip, int whichfork,
struct xfs_bmbt_irec *imap);
int xfs_rmap_unmap_extent(struct xfs_mount *mp, struct xfs_defer_ops *dfops,
struct xfs_inode *ip, int whichfork,
struct xfs_bmbt_irec *imap);
int xfs_rmap_convert_extent(struct xfs_mount *mp, struct xfs_defer_ops *dfops,
struct xfs_inode *ip, int whichfork,
struct xfs_bmbt_irec *imap);
int xfs_rmap_alloc_extent(struct xfs_mount *mp, struct xfs_defer_ops *dfops,
xfs_agnumber_t agno, xfs_agblock_t bno, xfs_extlen_t len,
uint64_t owner);
int xfs_rmap_free_extent(struct xfs_mount *mp, struct xfs_defer_ops *dfops,
xfs_agnumber_t agno, xfs_agblock_t bno, xfs_extlen_t len,
uint64_t owner);
void xfs_rmap_finish_one_cleanup(struct xfs_trans *tp,
struct xfs_btree_cur *rcur, int error);
int xfs_rmap_finish_one(struct xfs_trans *tp, enum xfs_rmap_intent_type type,
uint64_t owner, int whichfork, xfs_fileoff_t startoff,
xfs_fsblock_t startblock, xfs_filblks_t blockcount,
xfs_exntst_t state, struct xfs_btree_cur **pcur);
int xfs_rmap_find_left_neighbor(struct xfs_btree_cur *cur, xfs_agblock_t bno,
uint64_t owner, uint64_t offset, unsigned int flags,
struct xfs_rmap_irec *irec, int *stat);
int xfs_rmap_lookup_le_range(struct xfs_btree_cur *cur, xfs_agblock_t bno,
uint64_t owner, uint64_t offset, unsigned int flags,
struct xfs_rmap_irec *irec, int *stat);
int xfs_rmap_compare(const struct xfs_rmap_irec *a,
const struct xfs_rmap_irec *b);
union xfs_btree_rec;
int xfs_rmap_btrec_to_irec(union xfs_btree_rec *rec,
struct xfs_rmap_irec *irec);
int xfs_rmap_has_record(struct xfs_btree_cur *cur, xfs_agblock_t bno,
xfs_extlen_t len, bool *exists);
int xfs_rmap_record_exists(struct xfs_btree_cur *cur, xfs_agblock_t bno,
xfs_extlen_t len, struct xfs_owner_info *oinfo,
bool *has_rmap);
int xfs_rmap_has_other_keys(struct xfs_btree_cur *cur, xfs_agblock_t bno,
xfs_extlen_t len, struct xfs_owner_info *oinfo,
bool *has_rmap);
int xfs_rmap_map_raw(struct xfs_btree_cur *cur, struct xfs_rmap_irec *rmap);
#endif /* __XFS_RMAP_H__ */
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