| /* |
| * Copyright (C) 2016 Oracle. All Rights Reserved. |
| * |
| * Author: Darrick J. Wong <darrick.wong@oracle.com> |
| * |
| * 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; either version 2 |
| * of the License, or (at your option) any later version. |
| * |
| * 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_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); |
| |
| #endif /* __XFS_RMAP_H__ */ |
