From d0b2f91bede3bd5e3d24dd6803e56eee959c1797 Mon Sep 17 00:00:00 2001 From: André Fabian Silva Delgado Date: Thu, 20 Oct 2016 00:10:27 -0300 Subject: Linux-libre 4.8.2-gnu --- fs/xfs/libxfs/xfs_rmap.h | 209 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 209 insertions(+) create mode 100644 fs/xfs/libxfs/xfs_rmap.h (limited to 'fs/xfs/libxfs/xfs_rmap.h') diff --git a/fs/xfs/libxfs/xfs_rmap.h b/fs/xfs/libxfs/xfs_rmap.h new file mode 100644 index 000000000..71cf99a4a --- /dev/null +++ b/fs/xfs/libxfs/xfs_rmap.h @@ -0,0 +1,209 @@ +/* + * Copyright (C) 2016 Oracle. All Rights Reserved. + * + * Author: Darrick J. Wong + * + * 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) +{ + oi->oi_owner = 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); + +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); + +#endif /* __XFS_RMAP_H__ */ -- cgit v1.2.3-54-g00ecf