xfs: convert unwritten status of reverse mappings for shared files
Provide a function to convert an unwritten extent to a real one and vice versa when shared extents are possible. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Darrick J. Wong
parent
ceeb9c832e
commit
3f165b334e
@ -1278,6 +1278,384 @@ done:
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return error;
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return error;
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}
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}
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/*
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* Convert an unwritten extent to a real extent or vice versa. If there is no
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* possibility of overlapping extents, delegate to the simpler convert
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* function.
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*/
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STATIC int
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xfs_rmap_convert_shared(
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struct xfs_btree_cur *cur,
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xfs_agblock_t bno,
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xfs_extlen_t len,
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bool unwritten,
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struct xfs_owner_info *oinfo)
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{
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struct xfs_mount *mp = cur->bc_mp;
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struct xfs_rmap_irec r[4]; /* neighbor extent entries */
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/* left is 0, right is 1, prev is 2 */
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/* new is 3 */
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uint64_t owner;
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uint64_t offset;
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uint64_t new_endoff;
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unsigned int oldext;
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unsigned int newext;
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unsigned int flags = 0;
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int i;
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int state = 0;
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int error;
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xfs_owner_info_unpack(oinfo, &owner, &offset, &flags);
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ASSERT(!(XFS_RMAP_NON_INODE_OWNER(owner) ||
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(flags & (XFS_RMAP_ATTR_FORK | XFS_RMAP_BMBT_BLOCK))));
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oldext = unwritten ? XFS_RMAP_UNWRITTEN : 0;
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new_endoff = offset + len;
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trace_xfs_rmap_convert(mp, cur->bc_private.a.agno, bno, len,
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unwritten, oinfo);
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/*
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* For the initial lookup, look for and exact match or the left-adjacent
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* record for our insertion point. This will also give us the record for
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* start block contiguity tests.
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*/
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error = xfs_rmap_lookup_le_range(cur, bno, owner, offset, flags,
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&PREV, &i);
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XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done);
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ASSERT(PREV.rm_offset <= offset);
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ASSERT(PREV.rm_offset + PREV.rm_blockcount >= new_endoff);
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ASSERT((PREV.rm_flags & XFS_RMAP_UNWRITTEN) == oldext);
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newext = ~oldext & XFS_RMAP_UNWRITTEN;
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/*
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* Set flags determining what part of the previous oldext allocation
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* extent is being replaced by a newext allocation.
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*/
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if (PREV.rm_offset == offset)
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state |= RMAP_LEFT_FILLING;
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if (PREV.rm_offset + PREV.rm_blockcount == new_endoff)
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state |= RMAP_RIGHT_FILLING;
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/* Is there a left record that abuts our range? */
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error = xfs_rmap_find_left_neighbor(cur, bno, owner, offset, newext,
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&LEFT, &i);
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if (error)
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goto done;
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if (i) {
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state |= RMAP_LEFT_VALID;
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XFS_WANT_CORRUPTED_GOTO(mp,
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LEFT.rm_startblock + LEFT.rm_blockcount <= bno,
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done);
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if (xfs_rmap_is_mergeable(&LEFT, owner, newext))
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state |= RMAP_LEFT_CONTIG;
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}
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/* Is there a right record that abuts our range? */
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error = xfs_rmap_lookup_eq(cur, bno + len, len, owner, offset + len,
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newext, &i);
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if (error)
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goto done;
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if (i) {
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state |= RMAP_RIGHT_VALID;
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error = xfs_rmap_get_rec(cur, &RIGHT, &i);
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if (error)
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goto done;
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XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done);
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XFS_WANT_CORRUPTED_GOTO(mp, bno + len <= RIGHT.rm_startblock,
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done);
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trace_xfs_rmap_find_right_neighbor_result(cur->bc_mp,
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cur->bc_private.a.agno, RIGHT.rm_startblock,
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RIGHT.rm_blockcount, RIGHT.rm_owner,
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RIGHT.rm_offset, RIGHT.rm_flags);
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if (xfs_rmap_is_mergeable(&RIGHT, owner, newext))
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state |= RMAP_RIGHT_CONTIG;
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}
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/* check that left + prev + right is not too long */
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if ((state & (RMAP_LEFT_FILLING | RMAP_LEFT_CONTIG |
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RMAP_RIGHT_FILLING | RMAP_RIGHT_CONTIG)) ==
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(RMAP_LEFT_FILLING | RMAP_LEFT_CONTIG |
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RMAP_RIGHT_FILLING | RMAP_RIGHT_CONTIG) &&
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(unsigned long)LEFT.rm_blockcount + len +
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RIGHT.rm_blockcount > XFS_RMAP_LEN_MAX)
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state &= ~RMAP_RIGHT_CONTIG;
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trace_xfs_rmap_convert_state(mp, cur->bc_private.a.agno, state,
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_RET_IP_);
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/*
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* Switch out based on the FILLING and CONTIG state bits.
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*/
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switch (state & (RMAP_LEFT_FILLING | RMAP_LEFT_CONTIG |
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RMAP_RIGHT_FILLING | RMAP_RIGHT_CONTIG)) {
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case RMAP_LEFT_FILLING | RMAP_LEFT_CONTIG |
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RMAP_RIGHT_FILLING | RMAP_RIGHT_CONTIG:
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/*
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* Setting all of a previous oldext extent to newext.
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* The left and right neighbors are both contiguous with new.
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*/
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error = xfs_rmap_delete(cur, RIGHT.rm_startblock,
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RIGHT.rm_blockcount, RIGHT.rm_owner,
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RIGHT.rm_offset, RIGHT.rm_flags);
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if (error)
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goto done;
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error = xfs_rmap_delete(cur, PREV.rm_startblock,
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PREV.rm_blockcount, PREV.rm_owner,
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PREV.rm_offset, PREV.rm_flags);
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if (error)
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goto done;
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NEW = LEFT;
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error = xfs_rmap_lookup_eq(cur, NEW.rm_startblock,
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NEW.rm_blockcount, NEW.rm_owner,
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NEW.rm_offset, NEW.rm_flags, &i);
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if (error)
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goto done;
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XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done);
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NEW.rm_blockcount += PREV.rm_blockcount + RIGHT.rm_blockcount;
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error = xfs_rmap_update(cur, &NEW);
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if (error)
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goto done;
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break;
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case RMAP_LEFT_FILLING | RMAP_RIGHT_FILLING | RMAP_LEFT_CONTIG:
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/*
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* Setting all of a previous oldext extent to newext.
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* The left neighbor is contiguous, the right is not.
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*/
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error = xfs_rmap_delete(cur, PREV.rm_startblock,
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PREV.rm_blockcount, PREV.rm_owner,
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PREV.rm_offset, PREV.rm_flags);
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if (error)
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goto done;
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NEW = LEFT;
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error = xfs_rmap_lookup_eq(cur, NEW.rm_startblock,
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NEW.rm_blockcount, NEW.rm_owner,
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NEW.rm_offset, NEW.rm_flags, &i);
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if (error)
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goto done;
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XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done);
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NEW.rm_blockcount += PREV.rm_blockcount;
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error = xfs_rmap_update(cur, &NEW);
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if (error)
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goto done;
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break;
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case RMAP_LEFT_FILLING | RMAP_RIGHT_FILLING | RMAP_RIGHT_CONTIG:
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/*
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* Setting all of a previous oldext extent to newext.
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* The right neighbor is contiguous, the left is not.
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*/
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error = xfs_rmap_delete(cur, RIGHT.rm_startblock,
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RIGHT.rm_blockcount, RIGHT.rm_owner,
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RIGHT.rm_offset, RIGHT.rm_flags);
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if (error)
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goto done;
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NEW = PREV;
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error = xfs_rmap_lookup_eq(cur, NEW.rm_startblock,
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NEW.rm_blockcount, NEW.rm_owner,
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NEW.rm_offset, NEW.rm_flags, &i);
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if (error)
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goto done;
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XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done);
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NEW.rm_blockcount += RIGHT.rm_blockcount;
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NEW.rm_flags = RIGHT.rm_flags;
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error = xfs_rmap_update(cur, &NEW);
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if (error)
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goto done;
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break;
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case RMAP_LEFT_FILLING | RMAP_RIGHT_FILLING:
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/*
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* Setting all of a previous oldext extent to newext.
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* Neither the left nor right neighbors are contiguous with
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* the new one.
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*/
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NEW = PREV;
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error = xfs_rmap_lookup_eq(cur, NEW.rm_startblock,
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NEW.rm_blockcount, NEW.rm_owner,
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NEW.rm_offset, NEW.rm_flags, &i);
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if (error)
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goto done;
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XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done);
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NEW.rm_flags = newext;
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error = xfs_rmap_update(cur, &NEW);
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if (error)
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goto done;
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break;
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case RMAP_LEFT_FILLING | RMAP_LEFT_CONTIG:
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/*
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* Setting the first part of a previous oldext extent to newext.
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* The left neighbor is contiguous.
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*/
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NEW = PREV;
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error = xfs_rmap_delete(cur, NEW.rm_startblock,
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NEW.rm_blockcount, NEW.rm_owner,
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NEW.rm_offset, NEW.rm_flags);
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if (error)
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goto done;
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NEW.rm_offset += len;
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NEW.rm_startblock += len;
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NEW.rm_blockcount -= len;
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error = xfs_rmap_insert(cur, NEW.rm_startblock,
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NEW.rm_blockcount, NEW.rm_owner,
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NEW.rm_offset, NEW.rm_flags);
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if (error)
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goto done;
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NEW = LEFT;
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error = xfs_rmap_lookup_eq(cur, NEW.rm_startblock,
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NEW.rm_blockcount, NEW.rm_owner,
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NEW.rm_offset, NEW.rm_flags, &i);
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if (error)
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goto done;
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XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done);
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NEW.rm_blockcount += len;
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error = xfs_rmap_update(cur, &NEW);
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if (error)
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goto done;
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break;
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case RMAP_LEFT_FILLING:
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/*
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* Setting the first part of a previous oldext extent to newext.
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* The left neighbor is not contiguous.
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*/
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NEW = PREV;
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error = xfs_rmap_delete(cur, NEW.rm_startblock,
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NEW.rm_blockcount, NEW.rm_owner,
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NEW.rm_offset, NEW.rm_flags);
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if (error)
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goto done;
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NEW.rm_offset += len;
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NEW.rm_startblock += len;
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NEW.rm_blockcount -= len;
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error = xfs_rmap_insert(cur, NEW.rm_startblock,
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NEW.rm_blockcount, NEW.rm_owner,
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NEW.rm_offset, NEW.rm_flags);
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if (error)
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goto done;
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error = xfs_rmap_insert(cur, bno, len, owner, offset, newext);
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if (error)
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goto done;
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break;
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case RMAP_RIGHT_FILLING | RMAP_RIGHT_CONTIG:
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/*
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* Setting the last part of a previous oldext extent to newext.
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* The right neighbor is contiguous with the new allocation.
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*/
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NEW = PREV;
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error = xfs_rmap_lookup_eq(cur, NEW.rm_startblock,
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NEW.rm_blockcount, NEW.rm_owner,
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NEW.rm_offset, NEW.rm_flags, &i);
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if (error)
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goto done;
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XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done);
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NEW.rm_blockcount = offset - NEW.rm_offset;
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error = xfs_rmap_update(cur, &NEW);
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if (error)
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goto done;
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NEW = RIGHT;
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error = xfs_rmap_delete(cur, NEW.rm_startblock,
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NEW.rm_blockcount, NEW.rm_owner,
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NEW.rm_offset, NEW.rm_flags);
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if (error)
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goto done;
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NEW.rm_offset = offset;
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NEW.rm_startblock = bno;
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NEW.rm_blockcount += len;
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error = xfs_rmap_insert(cur, NEW.rm_startblock,
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NEW.rm_blockcount, NEW.rm_owner,
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NEW.rm_offset, NEW.rm_flags);
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if (error)
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goto done;
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break;
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case RMAP_RIGHT_FILLING:
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/*
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* Setting the last part of a previous oldext extent to newext.
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* The right neighbor is not contiguous.
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*/
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NEW = PREV;
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error = xfs_rmap_lookup_eq(cur, NEW.rm_startblock,
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NEW.rm_blockcount, NEW.rm_owner,
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NEW.rm_offset, NEW.rm_flags, &i);
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if (error)
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goto done;
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XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done);
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NEW.rm_blockcount -= len;
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error = xfs_rmap_update(cur, &NEW);
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if (error)
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goto done;
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error = xfs_rmap_insert(cur, bno, len, owner, offset, newext);
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|
if (error)
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goto done;
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break;
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case 0:
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/*
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* Setting the middle part of a previous oldext extent to
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* newext. Contiguity is impossible here.
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* One extent becomes three extents.
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*/
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/* new right extent - oldext */
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NEW.rm_startblock = bno + len;
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NEW.rm_owner = owner;
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NEW.rm_offset = new_endoff;
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NEW.rm_blockcount = PREV.rm_offset + PREV.rm_blockcount -
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new_endoff;
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NEW.rm_flags = PREV.rm_flags;
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error = xfs_rmap_insert(cur, NEW.rm_startblock,
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NEW.rm_blockcount, NEW.rm_owner, NEW.rm_offset,
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NEW.rm_flags);
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if (error)
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goto done;
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/* new left extent - oldext */
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NEW = PREV;
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error = xfs_rmap_lookup_eq(cur, NEW.rm_startblock,
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NEW.rm_blockcount, NEW.rm_owner,
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NEW.rm_offset, NEW.rm_flags, &i);
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if (error)
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goto done;
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XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done);
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NEW.rm_blockcount = offset - NEW.rm_offset;
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error = xfs_rmap_update(cur, &NEW);
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|
if (error)
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goto done;
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/* new middle extent - newext */
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NEW.rm_startblock = bno;
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NEW.rm_blockcount = len;
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NEW.rm_owner = owner;
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NEW.rm_offset = offset;
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NEW.rm_flags = newext;
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error = xfs_rmap_insert(cur, NEW.rm_startblock,
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|
NEW.rm_blockcount, NEW.rm_owner, NEW.rm_offset,
|
||||||
|
NEW.rm_flags);
|
||||||
|
if (error)
|
||||||
|
goto done;
|
||||||
|
break;
|
||||||
|
|
||||||
|
case RMAP_LEFT_FILLING | RMAP_LEFT_CONTIG | RMAP_RIGHT_CONTIG:
|
||||||
|
case RMAP_RIGHT_FILLING | RMAP_LEFT_CONTIG | RMAP_RIGHT_CONTIG:
|
||||||
|
case RMAP_LEFT_FILLING | RMAP_RIGHT_CONTIG:
|
||||||
|
case RMAP_RIGHT_FILLING | RMAP_LEFT_CONTIG:
|
||||||
|
case RMAP_LEFT_CONTIG | RMAP_RIGHT_CONTIG:
|
||||||
|
case RMAP_LEFT_CONTIG:
|
||||||
|
case RMAP_RIGHT_CONTIG:
|
||||||
|
/*
|
||||||
|
* These cases are all impossible.
|
||||||
|
*/
|
||||||
|
ASSERT(0);
|
||||||
|
}
|
||||||
|
|
||||||
|
trace_xfs_rmap_convert_done(mp, cur->bc_private.a.agno, bno, len,
|
||||||
|
unwritten, oinfo);
|
||||||
|
done:
|
||||||
|
if (error)
|
||||||
|
trace_xfs_rmap_convert_error(cur->bc_mp,
|
||||||
|
cur->bc_private.a.agno, error, _RET_IP_);
|
||||||
|
return error;
|
||||||
|
}
|
||||||
|
|
||||||
#undef NEW
|
#undef NEW
|
||||||
#undef LEFT
|
#undef LEFT
|
||||||
#undef RIGHT
|
#undef RIGHT
|
||||||
@ -1754,6 +2132,10 @@ xfs_rmap_finish_one(
|
|||||||
error = xfs_rmap_convert(rcur, bno, blockcount, !unwritten,
|
error = xfs_rmap_convert(rcur, bno, blockcount, !unwritten,
|
||||||
&oinfo);
|
&oinfo);
|
||||||
break;
|
break;
|
||||||
|
case XFS_RMAP_CONVERT_SHARED:
|
||||||
|
error = xfs_rmap_convert_shared(rcur, bno, blockcount,
|
||||||
|
!unwritten, &oinfo);
|
||||||
|
break;
|
||||||
default:
|
default:
|
||||||
ASSERT(0);
|
ASSERT(0);
|
||||||
error = -EFSCORRUPTED;
|
error = -EFSCORRUPTED;
|
||||||
@ -1857,7 +2239,8 @@ xfs_rmap_convert_extent(
|
|||||||
if (!xfs_rmap_update_is_needed(mp, whichfork))
|
if (!xfs_rmap_update_is_needed(mp, whichfork))
|
||||||
return 0;
|
return 0;
|
||||||
|
|
||||||
return __xfs_rmap_add(mp, dfops, XFS_RMAP_CONVERT, ip->i_ino,
|
return __xfs_rmap_add(mp, dfops, xfs_is_reflink_inode(ip) ?
|
||||||
|
XFS_RMAP_CONVERT_SHARED : XFS_RMAP_CONVERT, ip->i_ino,
|
||||||
whichfork, PREV);
|
whichfork, PREV);
|
||||||
}
|
}
|
||||||
|
|
||||||
|
|||||||
@ -496,6 +496,9 @@ xfs_rui_recover(
|
|||||||
case XFS_RMAP_EXTENT_CONVERT:
|
case XFS_RMAP_EXTENT_CONVERT:
|
||||||
type = XFS_RMAP_CONVERT;
|
type = XFS_RMAP_CONVERT;
|
||||||
break;
|
break;
|
||||||
|
case XFS_RMAP_EXTENT_CONVERT_SHARED:
|
||||||
|
type = XFS_RMAP_CONVERT_SHARED;
|
||||||
|
break;
|
||||||
case XFS_RMAP_EXTENT_ALLOC:
|
case XFS_RMAP_EXTENT_ALLOC:
|
||||||
type = XFS_RMAP_ALLOC;
|
type = XFS_RMAP_ALLOC;
|
||||||
break;
|
break;
|
||||||
|
|||||||
Loading…
Reference in New Issue
Block a user