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https://github.com/edk2-porting/linux-next.git
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5880f2d78f
Create rmap update intent/done log items to record redo information in the log. Because we need to roll transactions between updating the bmbt mapping and updating the reverse mapping, we also have to track the status of the metadata updates that will be recorded in the post-roll transactions, just in case we crash before committing the final transaction. This mechanism enables log recovery to finish what was already started. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Brian Foster <bfoster@redhat.com> Signed-off-by: Dave Chinner <david@fromorbit.com>
186 lines
4.8 KiB
C
186 lines
4.8 KiB
C
/*
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* Copyright (C) 2016 Oracle. All Rights Reserved.
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*
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* Author: Darrick J. Wong <darrick.wong@oracle.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it would be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#ifndef __XFS_RMAP_H__
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#define __XFS_RMAP_H__
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static inline void
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xfs_rmap_ag_owner(
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struct xfs_owner_info *oi,
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uint64_t owner)
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{
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oi->oi_owner = owner;
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oi->oi_offset = 0;
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oi->oi_flags = 0;
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}
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static inline void
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xfs_rmap_ino_bmbt_owner(
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struct xfs_owner_info *oi,
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xfs_ino_t ino,
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int whichfork)
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{
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oi->oi_owner = ino;
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oi->oi_offset = 0;
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oi->oi_flags = XFS_OWNER_INFO_BMBT_BLOCK;
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if (whichfork == XFS_ATTR_FORK)
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oi->oi_flags |= XFS_OWNER_INFO_ATTR_FORK;
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}
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static inline void
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xfs_rmap_ino_owner(
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struct xfs_owner_info *oi,
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xfs_ino_t ino,
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int whichfork,
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xfs_fileoff_t offset)
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{
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oi->oi_owner = ino;
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oi->oi_offset = offset;
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oi->oi_flags = 0;
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if (whichfork == XFS_ATTR_FORK)
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oi->oi_flags |= XFS_OWNER_INFO_ATTR_FORK;
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}
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static inline void
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xfs_rmap_skip_owner_update(
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struct xfs_owner_info *oi)
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{
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oi->oi_owner = XFS_RMAP_OWN_UNKNOWN;
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}
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/* Reverse mapping functions. */
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struct xfs_buf;
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static inline __u64
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xfs_rmap_irec_offset_pack(
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const struct xfs_rmap_irec *irec)
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{
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__u64 x;
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x = XFS_RMAP_OFF(irec->rm_offset);
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if (irec->rm_flags & XFS_RMAP_ATTR_FORK)
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x |= XFS_RMAP_OFF_ATTR_FORK;
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if (irec->rm_flags & XFS_RMAP_BMBT_BLOCK)
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x |= XFS_RMAP_OFF_BMBT_BLOCK;
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if (irec->rm_flags & XFS_RMAP_UNWRITTEN)
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x |= XFS_RMAP_OFF_UNWRITTEN;
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return x;
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}
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static inline int
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xfs_rmap_irec_offset_unpack(
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__u64 offset,
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struct xfs_rmap_irec *irec)
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{
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if (offset & ~(XFS_RMAP_OFF_MASK | XFS_RMAP_OFF_FLAGS))
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return -EFSCORRUPTED;
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irec->rm_offset = XFS_RMAP_OFF(offset);
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if (offset & XFS_RMAP_OFF_ATTR_FORK)
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irec->rm_flags |= XFS_RMAP_ATTR_FORK;
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if (offset & XFS_RMAP_OFF_BMBT_BLOCK)
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irec->rm_flags |= XFS_RMAP_BMBT_BLOCK;
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if (offset & XFS_RMAP_OFF_UNWRITTEN)
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irec->rm_flags |= XFS_RMAP_UNWRITTEN;
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return 0;
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}
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static inline void
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xfs_owner_info_unpack(
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struct xfs_owner_info *oinfo,
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uint64_t *owner,
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uint64_t *offset,
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unsigned int *flags)
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{
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unsigned int r = 0;
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*owner = oinfo->oi_owner;
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*offset = oinfo->oi_offset;
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if (oinfo->oi_flags & XFS_OWNER_INFO_ATTR_FORK)
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r |= XFS_RMAP_ATTR_FORK;
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if (oinfo->oi_flags & XFS_OWNER_INFO_BMBT_BLOCK)
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r |= XFS_RMAP_BMBT_BLOCK;
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*flags = r;
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}
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static inline void
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xfs_owner_info_pack(
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struct xfs_owner_info *oinfo,
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uint64_t owner,
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uint64_t offset,
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unsigned int flags)
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{
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oinfo->oi_owner = owner;
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oinfo->oi_offset = XFS_RMAP_OFF(offset);
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oinfo->oi_flags = 0;
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if (flags & XFS_RMAP_ATTR_FORK)
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oinfo->oi_flags |= XFS_OWNER_INFO_ATTR_FORK;
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if (flags & XFS_RMAP_BMBT_BLOCK)
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oinfo->oi_flags |= XFS_OWNER_INFO_BMBT_BLOCK;
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}
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int xfs_rmap_alloc(struct xfs_trans *tp, struct xfs_buf *agbp,
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xfs_agnumber_t agno, xfs_agblock_t bno, xfs_extlen_t len,
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struct xfs_owner_info *oinfo);
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int xfs_rmap_free(struct xfs_trans *tp, struct xfs_buf *agbp,
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xfs_agnumber_t agno, xfs_agblock_t bno, xfs_extlen_t len,
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struct xfs_owner_info *oinfo);
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int xfs_rmap_lookup_le(struct xfs_btree_cur *cur, xfs_agblock_t bno,
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xfs_extlen_t len, uint64_t owner, uint64_t offset,
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unsigned int flags, int *stat);
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int xfs_rmap_lookup_eq(struct xfs_btree_cur *cur, xfs_agblock_t bno,
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xfs_extlen_t len, uint64_t owner, uint64_t offset,
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unsigned int flags, int *stat);
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int xfs_rmap_insert(struct xfs_btree_cur *rcur, xfs_agblock_t agbno,
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xfs_extlen_t len, uint64_t owner, uint64_t offset,
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unsigned int flags);
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int xfs_rmap_get_rec(struct xfs_btree_cur *cur, struct xfs_rmap_irec *irec,
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int *stat);
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typedef int (*xfs_rmap_query_range_fn)(
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struct xfs_btree_cur *cur,
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struct xfs_rmap_irec *rec,
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void *priv);
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int xfs_rmap_query_range(struct xfs_btree_cur *cur,
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struct xfs_rmap_irec *low_rec, struct xfs_rmap_irec *high_rec,
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xfs_rmap_query_range_fn fn, void *priv);
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enum xfs_rmap_intent_type {
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XFS_RMAP_MAP,
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XFS_RMAP_MAP_SHARED,
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XFS_RMAP_UNMAP,
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XFS_RMAP_UNMAP_SHARED,
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XFS_RMAP_CONVERT,
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XFS_RMAP_CONVERT_SHARED,
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XFS_RMAP_ALLOC,
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XFS_RMAP_FREE,
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};
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struct xfs_rmap_intent {
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struct list_head ri_list;
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enum xfs_rmap_intent_type ri_type;
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__uint64_t ri_owner;
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int ri_whichfork;
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struct xfs_bmbt_irec ri_bmap;
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};
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#endif /* __XFS_RMAP_H__ */
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