932 строки
23 KiB
C
932 строки
23 KiB
C
/*
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* Copyright (c) 2000-2003,2005 Silicon Graphics, Inc.
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* All Rights Reserved.
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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 as
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* published by the Free Software Foundation.
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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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#include "xfs.h"
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#include "xfs_fs.h"
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#include "xfs_types.h"
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#include "xfs_bit.h"
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#include "xfs_log.h"
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#include "xfs_inum.h"
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#include "xfs_trans.h"
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#include "xfs_sb.h"
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#include "xfs_ag.h"
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#include "xfs_dir2.h"
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#include "xfs_dmapi.h"
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#include "xfs_mount.h"
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#include "xfs_bmap_btree.h"
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#include "xfs_alloc_btree.h"
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#include "xfs_ialloc_btree.h"
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#include "xfs_dir2_sf.h"
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#include "xfs_attr_sf.h"
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#include "xfs_dinode.h"
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#include "xfs_inode.h"
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#include "xfs_inode_item.h"
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#include "xfs_alloc.h"
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#include "xfs_btree.h"
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#include "xfs_btree_trace.h"
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#include "xfs_ialloc.h"
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#include "xfs_itable.h"
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#include "xfs_bmap.h"
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#include "xfs_error.h"
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#include "xfs_quota.h"
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/*
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* Determine the extent state.
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*/
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/* ARGSUSED */
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STATIC xfs_exntst_t
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xfs_extent_state(
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xfs_filblks_t blks,
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int extent_flag)
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{
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if (extent_flag) {
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ASSERT(blks != 0); /* saved for DMIG */
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return XFS_EXT_UNWRITTEN;
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}
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return XFS_EXT_NORM;
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}
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/*
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* Convert on-disk form of btree root to in-memory form.
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*/
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void
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xfs_bmdr_to_bmbt(
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struct xfs_mount *mp,
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xfs_bmdr_block_t *dblock,
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int dblocklen,
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struct xfs_btree_block *rblock,
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int rblocklen)
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{
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int dmxr;
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xfs_bmbt_key_t *fkp;
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__be64 *fpp;
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xfs_bmbt_key_t *tkp;
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__be64 *tpp;
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rblock->bb_magic = cpu_to_be32(XFS_BMAP_MAGIC);
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rblock->bb_level = dblock->bb_level;
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ASSERT(be16_to_cpu(rblock->bb_level) > 0);
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rblock->bb_numrecs = dblock->bb_numrecs;
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rblock->bb_u.l.bb_leftsib = cpu_to_be64(NULLDFSBNO);
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rblock->bb_u.l.bb_rightsib = cpu_to_be64(NULLDFSBNO);
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dmxr = xfs_bmdr_maxrecs(mp, dblocklen, 0);
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fkp = XFS_BMDR_KEY_ADDR(dblock, 1);
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tkp = XFS_BMBT_KEY_ADDR(mp, rblock, 1);
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fpp = XFS_BMDR_PTR_ADDR(dblock, 1, dmxr);
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tpp = XFS_BMAP_BROOT_PTR_ADDR(mp, rblock, 1, rblocklen);
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dmxr = be16_to_cpu(dblock->bb_numrecs);
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memcpy(tkp, fkp, sizeof(*fkp) * dmxr);
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memcpy(tpp, fpp, sizeof(*fpp) * dmxr);
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}
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/*
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* Convert a compressed bmap extent record to an uncompressed form.
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* This code must be in sync with the routines xfs_bmbt_get_startoff,
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* xfs_bmbt_get_startblock, xfs_bmbt_get_blockcount and xfs_bmbt_get_state.
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*/
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STATIC_INLINE void
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__xfs_bmbt_get_all(
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__uint64_t l0,
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__uint64_t l1,
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xfs_bmbt_irec_t *s)
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{
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int ext_flag;
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xfs_exntst_t st;
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ext_flag = (int)(l0 >> (64 - BMBT_EXNTFLAG_BITLEN));
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s->br_startoff = ((xfs_fileoff_t)l0 &
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xfs_mask64lo(64 - BMBT_EXNTFLAG_BITLEN)) >> 9;
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#if XFS_BIG_BLKNOS
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s->br_startblock = (((xfs_fsblock_t)l0 & xfs_mask64lo(9)) << 43) |
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(((xfs_fsblock_t)l1) >> 21);
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#else
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#ifdef DEBUG
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{
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xfs_dfsbno_t b;
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b = (((xfs_dfsbno_t)l0 & xfs_mask64lo(9)) << 43) |
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(((xfs_dfsbno_t)l1) >> 21);
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ASSERT((b >> 32) == 0 || isnulldstartblock(b));
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s->br_startblock = (xfs_fsblock_t)b;
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}
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#else /* !DEBUG */
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s->br_startblock = (xfs_fsblock_t)(((xfs_dfsbno_t)l1) >> 21);
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#endif /* DEBUG */
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#endif /* XFS_BIG_BLKNOS */
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s->br_blockcount = (xfs_filblks_t)(l1 & xfs_mask64lo(21));
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/* This is xfs_extent_state() in-line */
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if (ext_flag) {
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ASSERT(s->br_blockcount != 0); /* saved for DMIG */
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st = XFS_EXT_UNWRITTEN;
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} else
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st = XFS_EXT_NORM;
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s->br_state = st;
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}
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void
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xfs_bmbt_get_all(
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xfs_bmbt_rec_host_t *r,
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xfs_bmbt_irec_t *s)
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{
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__xfs_bmbt_get_all(r->l0, r->l1, s);
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}
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/*
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* Extract the blockcount field from an in memory bmap extent record.
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*/
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xfs_filblks_t
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xfs_bmbt_get_blockcount(
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xfs_bmbt_rec_host_t *r)
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{
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return (xfs_filblks_t)(r->l1 & xfs_mask64lo(21));
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}
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/*
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* Extract the startblock field from an in memory bmap extent record.
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*/
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xfs_fsblock_t
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xfs_bmbt_get_startblock(
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xfs_bmbt_rec_host_t *r)
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{
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#if XFS_BIG_BLKNOS
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return (((xfs_fsblock_t)r->l0 & xfs_mask64lo(9)) << 43) |
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(((xfs_fsblock_t)r->l1) >> 21);
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#else
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#ifdef DEBUG
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xfs_dfsbno_t b;
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b = (((xfs_dfsbno_t)r->l0 & xfs_mask64lo(9)) << 43) |
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(((xfs_dfsbno_t)r->l1) >> 21);
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ASSERT((b >> 32) == 0 || isnulldstartblock(b));
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return (xfs_fsblock_t)b;
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#else /* !DEBUG */
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return (xfs_fsblock_t)(((xfs_dfsbno_t)r->l1) >> 21);
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#endif /* DEBUG */
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#endif /* XFS_BIG_BLKNOS */
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}
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/*
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* Extract the startoff field from an in memory bmap extent record.
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*/
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xfs_fileoff_t
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xfs_bmbt_get_startoff(
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xfs_bmbt_rec_host_t *r)
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{
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return ((xfs_fileoff_t)r->l0 &
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xfs_mask64lo(64 - BMBT_EXNTFLAG_BITLEN)) >> 9;
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}
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xfs_exntst_t
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xfs_bmbt_get_state(
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xfs_bmbt_rec_host_t *r)
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{
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int ext_flag;
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ext_flag = (int)((r->l0) >> (64 - BMBT_EXNTFLAG_BITLEN));
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return xfs_extent_state(xfs_bmbt_get_blockcount(r),
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ext_flag);
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}
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/* Endian flipping versions of the bmbt extraction functions */
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void
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xfs_bmbt_disk_get_all(
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xfs_bmbt_rec_t *r,
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xfs_bmbt_irec_t *s)
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{
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__xfs_bmbt_get_all(get_unaligned_be64(&r->l0),
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get_unaligned_be64(&r->l1), s);
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}
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/*
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* Extract the blockcount field from an on disk bmap extent record.
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*/
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xfs_filblks_t
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xfs_bmbt_disk_get_blockcount(
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xfs_bmbt_rec_t *r)
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{
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return (xfs_filblks_t)(be64_to_cpu(r->l1) & xfs_mask64lo(21));
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}
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/*
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* Extract the startoff field from a disk format bmap extent record.
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*/
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xfs_fileoff_t
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xfs_bmbt_disk_get_startoff(
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xfs_bmbt_rec_t *r)
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{
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return ((xfs_fileoff_t)be64_to_cpu(r->l0) &
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xfs_mask64lo(64 - BMBT_EXNTFLAG_BITLEN)) >> 9;
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}
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/*
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* Set all the fields in a bmap extent record from the arguments.
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*/
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void
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xfs_bmbt_set_allf(
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xfs_bmbt_rec_host_t *r,
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xfs_fileoff_t startoff,
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xfs_fsblock_t startblock,
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xfs_filblks_t blockcount,
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xfs_exntst_t state)
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{
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int extent_flag = (state == XFS_EXT_NORM) ? 0 : 1;
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ASSERT(state == XFS_EXT_NORM || state == XFS_EXT_UNWRITTEN);
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ASSERT((startoff & xfs_mask64hi(64-BMBT_STARTOFF_BITLEN)) == 0);
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ASSERT((blockcount & xfs_mask64hi(64-BMBT_BLOCKCOUNT_BITLEN)) == 0);
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#if XFS_BIG_BLKNOS
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ASSERT((startblock & xfs_mask64hi(64-BMBT_STARTBLOCK_BITLEN)) == 0);
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r->l0 = ((xfs_bmbt_rec_base_t)extent_flag << 63) |
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((xfs_bmbt_rec_base_t)startoff << 9) |
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((xfs_bmbt_rec_base_t)startblock >> 43);
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r->l1 = ((xfs_bmbt_rec_base_t)startblock << 21) |
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((xfs_bmbt_rec_base_t)blockcount &
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(xfs_bmbt_rec_base_t)xfs_mask64lo(21));
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#else /* !XFS_BIG_BLKNOS */
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if (isnullstartblock(startblock)) {
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r->l0 = ((xfs_bmbt_rec_base_t)extent_flag << 63) |
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((xfs_bmbt_rec_base_t)startoff << 9) |
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(xfs_bmbt_rec_base_t)xfs_mask64lo(9);
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r->l1 = xfs_mask64hi(11) |
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((xfs_bmbt_rec_base_t)startblock << 21) |
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((xfs_bmbt_rec_base_t)blockcount &
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(xfs_bmbt_rec_base_t)xfs_mask64lo(21));
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} else {
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r->l0 = ((xfs_bmbt_rec_base_t)extent_flag << 63) |
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((xfs_bmbt_rec_base_t)startoff << 9);
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r->l1 = ((xfs_bmbt_rec_base_t)startblock << 21) |
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((xfs_bmbt_rec_base_t)blockcount &
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(xfs_bmbt_rec_base_t)xfs_mask64lo(21));
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}
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#endif /* XFS_BIG_BLKNOS */
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}
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/*
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* Set all the fields in a bmap extent record from the uncompressed form.
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*/
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void
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xfs_bmbt_set_all(
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xfs_bmbt_rec_host_t *r,
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xfs_bmbt_irec_t *s)
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{
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xfs_bmbt_set_allf(r, s->br_startoff, s->br_startblock,
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s->br_blockcount, s->br_state);
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}
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/*
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* Set all the fields in a disk format bmap extent record from the arguments.
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*/
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void
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xfs_bmbt_disk_set_allf(
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xfs_bmbt_rec_t *r,
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xfs_fileoff_t startoff,
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xfs_fsblock_t startblock,
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xfs_filblks_t blockcount,
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xfs_exntst_t state)
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{
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int extent_flag = (state == XFS_EXT_NORM) ? 0 : 1;
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ASSERT(state == XFS_EXT_NORM || state == XFS_EXT_UNWRITTEN);
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ASSERT((startoff & xfs_mask64hi(64-BMBT_STARTOFF_BITLEN)) == 0);
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ASSERT((blockcount & xfs_mask64hi(64-BMBT_BLOCKCOUNT_BITLEN)) == 0);
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#if XFS_BIG_BLKNOS
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ASSERT((startblock & xfs_mask64hi(64-BMBT_STARTBLOCK_BITLEN)) == 0);
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r->l0 = cpu_to_be64(
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((xfs_bmbt_rec_base_t)extent_flag << 63) |
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((xfs_bmbt_rec_base_t)startoff << 9) |
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((xfs_bmbt_rec_base_t)startblock >> 43));
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r->l1 = cpu_to_be64(
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((xfs_bmbt_rec_base_t)startblock << 21) |
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((xfs_bmbt_rec_base_t)blockcount &
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(xfs_bmbt_rec_base_t)xfs_mask64lo(21)));
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#else /* !XFS_BIG_BLKNOS */
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if (isnullstartblock(startblock)) {
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r->l0 = cpu_to_be64(
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((xfs_bmbt_rec_base_t)extent_flag << 63) |
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((xfs_bmbt_rec_base_t)startoff << 9) |
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(xfs_bmbt_rec_base_t)xfs_mask64lo(9));
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r->l1 = cpu_to_be64(xfs_mask64hi(11) |
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((xfs_bmbt_rec_base_t)startblock << 21) |
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((xfs_bmbt_rec_base_t)blockcount &
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(xfs_bmbt_rec_base_t)xfs_mask64lo(21)));
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} else {
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r->l0 = cpu_to_be64(
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((xfs_bmbt_rec_base_t)extent_flag << 63) |
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((xfs_bmbt_rec_base_t)startoff << 9));
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r->l1 = cpu_to_be64(
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((xfs_bmbt_rec_base_t)startblock << 21) |
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((xfs_bmbt_rec_base_t)blockcount &
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(xfs_bmbt_rec_base_t)xfs_mask64lo(21)));
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}
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#endif /* XFS_BIG_BLKNOS */
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}
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/*
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* Set all the fields in a bmap extent record from the uncompressed form.
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*/
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void
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xfs_bmbt_disk_set_all(
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xfs_bmbt_rec_t *r,
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xfs_bmbt_irec_t *s)
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{
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xfs_bmbt_disk_set_allf(r, s->br_startoff, s->br_startblock,
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s->br_blockcount, s->br_state);
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}
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/*
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* Set the blockcount field in a bmap extent record.
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*/
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void
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xfs_bmbt_set_blockcount(
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xfs_bmbt_rec_host_t *r,
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xfs_filblks_t v)
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{
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ASSERT((v & xfs_mask64hi(43)) == 0);
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r->l1 = (r->l1 & (xfs_bmbt_rec_base_t)xfs_mask64hi(43)) |
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(xfs_bmbt_rec_base_t)(v & xfs_mask64lo(21));
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}
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/*
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* Set the startblock field in a bmap extent record.
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*/
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void
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xfs_bmbt_set_startblock(
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xfs_bmbt_rec_host_t *r,
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xfs_fsblock_t v)
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{
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#if XFS_BIG_BLKNOS
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ASSERT((v & xfs_mask64hi(12)) == 0);
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r->l0 = (r->l0 & (xfs_bmbt_rec_base_t)xfs_mask64hi(55)) |
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(xfs_bmbt_rec_base_t)(v >> 43);
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r->l1 = (r->l1 & (xfs_bmbt_rec_base_t)xfs_mask64lo(21)) |
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(xfs_bmbt_rec_base_t)(v << 21);
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#else /* !XFS_BIG_BLKNOS */
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if (isnullstartblock(v)) {
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r->l0 |= (xfs_bmbt_rec_base_t)xfs_mask64lo(9);
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r->l1 = (xfs_bmbt_rec_base_t)xfs_mask64hi(11) |
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((xfs_bmbt_rec_base_t)v << 21) |
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(r->l1 & (xfs_bmbt_rec_base_t)xfs_mask64lo(21));
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} else {
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r->l0 &= ~(xfs_bmbt_rec_base_t)xfs_mask64lo(9);
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r->l1 = ((xfs_bmbt_rec_base_t)v << 21) |
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(r->l1 & (xfs_bmbt_rec_base_t)xfs_mask64lo(21));
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}
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#endif /* XFS_BIG_BLKNOS */
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}
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/*
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* Set the startoff field in a bmap extent record.
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*/
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void
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xfs_bmbt_set_startoff(
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xfs_bmbt_rec_host_t *r,
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xfs_fileoff_t v)
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{
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ASSERT((v & xfs_mask64hi(9)) == 0);
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r->l0 = (r->l0 & (xfs_bmbt_rec_base_t) xfs_mask64hi(1)) |
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((xfs_bmbt_rec_base_t)v << 9) |
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(r->l0 & (xfs_bmbt_rec_base_t)xfs_mask64lo(9));
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}
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/*
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* Set the extent state field in a bmap extent record.
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*/
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void
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xfs_bmbt_set_state(
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xfs_bmbt_rec_host_t *r,
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xfs_exntst_t v)
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{
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ASSERT(v == XFS_EXT_NORM || v == XFS_EXT_UNWRITTEN);
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if (v == XFS_EXT_NORM)
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r->l0 &= xfs_mask64lo(64 - BMBT_EXNTFLAG_BITLEN);
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else
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r->l0 |= xfs_mask64hi(BMBT_EXNTFLAG_BITLEN);
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}
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/*
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* Convert in-memory form of btree root to on-disk form.
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*/
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void
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xfs_bmbt_to_bmdr(
|
|
struct xfs_mount *mp,
|
|
struct xfs_btree_block *rblock,
|
|
int rblocklen,
|
|
xfs_bmdr_block_t *dblock,
|
|
int dblocklen)
|
|
{
|
|
int dmxr;
|
|
xfs_bmbt_key_t *fkp;
|
|
__be64 *fpp;
|
|
xfs_bmbt_key_t *tkp;
|
|
__be64 *tpp;
|
|
|
|
ASSERT(be32_to_cpu(rblock->bb_magic) == XFS_BMAP_MAGIC);
|
|
ASSERT(be64_to_cpu(rblock->bb_u.l.bb_leftsib) == NULLDFSBNO);
|
|
ASSERT(be64_to_cpu(rblock->bb_u.l.bb_rightsib) == NULLDFSBNO);
|
|
ASSERT(be16_to_cpu(rblock->bb_level) > 0);
|
|
dblock->bb_level = rblock->bb_level;
|
|
dblock->bb_numrecs = rblock->bb_numrecs;
|
|
dmxr = xfs_bmdr_maxrecs(mp, dblocklen, 0);
|
|
fkp = XFS_BMBT_KEY_ADDR(mp, rblock, 1);
|
|
tkp = XFS_BMDR_KEY_ADDR(dblock, 1);
|
|
fpp = XFS_BMAP_BROOT_PTR_ADDR(mp, rblock, 1, rblocklen);
|
|
tpp = XFS_BMDR_PTR_ADDR(dblock, 1, dmxr);
|
|
dmxr = be16_to_cpu(dblock->bb_numrecs);
|
|
memcpy(tkp, fkp, sizeof(*fkp) * dmxr);
|
|
memcpy(tpp, fpp, sizeof(*fpp) * dmxr);
|
|
}
|
|
|
|
/*
|
|
* Check extent records, which have just been read, for
|
|
* any bit in the extent flag field. ASSERT on debug
|
|
* kernels, as this condition should not occur.
|
|
* Return an error condition (1) if any flags found,
|
|
* otherwise return 0.
|
|
*/
|
|
|
|
int
|
|
xfs_check_nostate_extents(
|
|
xfs_ifork_t *ifp,
|
|
xfs_extnum_t idx,
|
|
xfs_extnum_t num)
|
|
{
|
|
for (; num > 0; num--, idx++) {
|
|
xfs_bmbt_rec_host_t *ep = xfs_iext_get_ext(ifp, idx);
|
|
if ((ep->l0 >>
|
|
(64 - BMBT_EXNTFLAG_BITLEN)) != 0) {
|
|
ASSERT(0);
|
|
return 1;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
|
|
STATIC struct xfs_btree_cur *
|
|
xfs_bmbt_dup_cursor(
|
|
struct xfs_btree_cur *cur)
|
|
{
|
|
struct xfs_btree_cur *new;
|
|
|
|
new = xfs_bmbt_init_cursor(cur->bc_mp, cur->bc_tp,
|
|
cur->bc_private.b.ip, cur->bc_private.b.whichfork);
|
|
|
|
/*
|
|
* Copy the firstblock, flist, and flags values,
|
|
* since init cursor doesn't get them.
|
|
*/
|
|
new->bc_private.b.firstblock = cur->bc_private.b.firstblock;
|
|
new->bc_private.b.flist = cur->bc_private.b.flist;
|
|
new->bc_private.b.flags = cur->bc_private.b.flags;
|
|
|
|
return new;
|
|
}
|
|
|
|
STATIC void
|
|
xfs_bmbt_update_cursor(
|
|
struct xfs_btree_cur *src,
|
|
struct xfs_btree_cur *dst)
|
|
{
|
|
ASSERT((dst->bc_private.b.firstblock != NULLFSBLOCK) ||
|
|
(dst->bc_private.b.ip->i_d.di_flags & XFS_DIFLAG_REALTIME));
|
|
ASSERT(dst->bc_private.b.flist == src->bc_private.b.flist);
|
|
|
|
dst->bc_private.b.allocated += src->bc_private.b.allocated;
|
|
dst->bc_private.b.firstblock = src->bc_private.b.firstblock;
|
|
|
|
src->bc_private.b.allocated = 0;
|
|
}
|
|
|
|
STATIC int
|
|
xfs_bmbt_alloc_block(
|
|
struct xfs_btree_cur *cur,
|
|
union xfs_btree_ptr *start,
|
|
union xfs_btree_ptr *new,
|
|
int length,
|
|
int *stat)
|
|
{
|
|
xfs_alloc_arg_t args; /* block allocation args */
|
|
int error; /* error return value */
|
|
|
|
memset(&args, 0, sizeof(args));
|
|
args.tp = cur->bc_tp;
|
|
args.mp = cur->bc_mp;
|
|
args.fsbno = cur->bc_private.b.firstblock;
|
|
args.firstblock = args.fsbno;
|
|
|
|
if (args.fsbno == NULLFSBLOCK) {
|
|
args.fsbno = be64_to_cpu(start->l);
|
|
args.type = XFS_ALLOCTYPE_START_BNO;
|
|
/*
|
|
* Make sure there is sufficient room left in the AG to
|
|
* complete a full tree split for an extent insert. If
|
|
* we are converting the middle part of an extent then
|
|
* we may need space for two tree splits.
|
|
*
|
|
* We are relying on the caller to make the correct block
|
|
* reservation for this operation to succeed. If the
|
|
* reservation amount is insufficient then we may fail a
|
|
* block allocation here and corrupt the filesystem.
|
|
*/
|
|
args.minleft = xfs_trans_get_block_res(args.tp);
|
|
} else if (cur->bc_private.b.flist->xbf_low) {
|
|
args.type = XFS_ALLOCTYPE_START_BNO;
|
|
} else {
|
|
args.type = XFS_ALLOCTYPE_NEAR_BNO;
|
|
}
|
|
|
|
args.minlen = args.maxlen = args.prod = 1;
|
|
args.wasdel = cur->bc_private.b.flags & XFS_BTCUR_BPRV_WASDEL;
|
|
if (!args.wasdel && xfs_trans_get_block_res(args.tp) == 0) {
|
|
error = XFS_ERROR(ENOSPC);
|
|
goto error0;
|
|
}
|
|
error = xfs_alloc_vextent(&args);
|
|
if (error)
|
|
goto error0;
|
|
|
|
if (args.fsbno == NULLFSBLOCK && args.minleft) {
|
|
/*
|
|
* Could not find an AG with enough free space to satisfy
|
|
* a full btree split. Try again without minleft and if
|
|
* successful activate the lowspace algorithm.
|
|
*/
|
|
args.fsbno = 0;
|
|
args.type = XFS_ALLOCTYPE_FIRST_AG;
|
|
args.minleft = 0;
|
|
error = xfs_alloc_vextent(&args);
|
|
if (error)
|
|
goto error0;
|
|
cur->bc_private.b.flist->xbf_low = 1;
|
|
}
|
|
if (args.fsbno == NULLFSBLOCK) {
|
|
XFS_BTREE_TRACE_CURSOR(cur, XBT_EXIT);
|
|
*stat = 0;
|
|
return 0;
|
|
}
|
|
ASSERT(args.len == 1);
|
|
cur->bc_private.b.firstblock = args.fsbno;
|
|
cur->bc_private.b.allocated++;
|
|
cur->bc_private.b.ip->i_d.di_nblocks++;
|
|
xfs_trans_log_inode(args.tp, cur->bc_private.b.ip, XFS_ILOG_CORE);
|
|
xfs_trans_mod_dquot_byino(args.tp, cur->bc_private.b.ip,
|
|
XFS_TRANS_DQ_BCOUNT, 1L);
|
|
|
|
new->l = cpu_to_be64(args.fsbno);
|
|
|
|
XFS_BTREE_TRACE_CURSOR(cur, XBT_EXIT);
|
|
*stat = 1;
|
|
return 0;
|
|
|
|
error0:
|
|
XFS_BTREE_TRACE_CURSOR(cur, XBT_ERROR);
|
|
return error;
|
|
}
|
|
|
|
STATIC int
|
|
xfs_bmbt_free_block(
|
|
struct xfs_btree_cur *cur,
|
|
struct xfs_buf *bp)
|
|
{
|
|
struct xfs_mount *mp = cur->bc_mp;
|
|
struct xfs_inode *ip = cur->bc_private.b.ip;
|
|
struct xfs_trans *tp = cur->bc_tp;
|
|
xfs_fsblock_t fsbno = XFS_DADDR_TO_FSB(mp, XFS_BUF_ADDR(bp));
|
|
|
|
xfs_bmap_add_free(fsbno, 1, cur->bc_private.b.flist, mp);
|
|
ip->i_d.di_nblocks--;
|
|
|
|
xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
|
|
xfs_trans_mod_dquot_byino(tp, ip, XFS_TRANS_DQ_BCOUNT, -1L);
|
|
xfs_trans_binval(tp, bp);
|
|
return 0;
|
|
}
|
|
|
|
STATIC int
|
|
xfs_bmbt_get_minrecs(
|
|
struct xfs_btree_cur *cur,
|
|
int level)
|
|
{
|
|
if (level == cur->bc_nlevels - 1) {
|
|
struct xfs_ifork *ifp;
|
|
|
|
ifp = XFS_IFORK_PTR(cur->bc_private.b.ip,
|
|
cur->bc_private.b.whichfork);
|
|
|
|
return xfs_bmbt_maxrecs(cur->bc_mp,
|
|
ifp->if_broot_bytes, level == 0) / 2;
|
|
}
|
|
|
|
return cur->bc_mp->m_bmap_dmnr[level != 0];
|
|
}
|
|
|
|
int
|
|
xfs_bmbt_get_maxrecs(
|
|
struct xfs_btree_cur *cur,
|
|
int level)
|
|
{
|
|
if (level == cur->bc_nlevels - 1) {
|
|
struct xfs_ifork *ifp;
|
|
|
|
ifp = XFS_IFORK_PTR(cur->bc_private.b.ip,
|
|
cur->bc_private.b.whichfork);
|
|
|
|
return xfs_bmbt_maxrecs(cur->bc_mp,
|
|
ifp->if_broot_bytes, level == 0);
|
|
}
|
|
|
|
return cur->bc_mp->m_bmap_dmxr[level != 0];
|
|
|
|
}
|
|
|
|
/*
|
|
* Get the maximum records we could store in the on-disk format.
|
|
*
|
|
* For non-root nodes this is equivalent to xfs_bmbt_get_maxrecs, but
|
|
* for the root node this checks the available space in the dinode fork
|
|
* so that we can resize the in-memory buffer to match it. After a
|
|
* resize to the maximum size this function returns the same value
|
|
* as xfs_bmbt_get_maxrecs for the root node, too.
|
|
*/
|
|
STATIC int
|
|
xfs_bmbt_get_dmaxrecs(
|
|
struct xfs_btree_cur *cur,
|
|
int level)
|
|
{
|
|
if (level != cur->bc_nlevels - 1)
|
|
return cur->bc_mp->m_bmap_dmxr[level != 0];
|
|
return xfs_bmdr_maxrecs(cur->bc_mp, cur->bc_private.b.forksize,
|
|
level == 0);
|
|
}
|
|
|
|
STATIC void
|
|
xfs_bmbt_init_key_from_rec(
|
|
union xfs_btree_key *key,
|
|
union xfs_btree_rec *rec)
|
|
{
|
|
key->bmbt.br_startoff =
|
|
cpu_to_be64(xfs_bmbt_disk_get_startoff(&rec->bmbt));
|
|
}
|
|
|
|
STATIC void
|
|
xfs_bmbt_init_rec_from_key(
|
|
union xfs_btree_key *key,
|
|
union xfs_btree_rec *rec)
|
|
{
|
|
ASSERT(key->bmbt.br_startoff != 0);
|
|
|
|
xfs_bmbt_disk_set_allf(&rec->bmbt, be64_to_cpu(key->bmbt.br_startoff),
|
|
0, 0, XFS_EXT_NORM);
|
|
}
|
|
|
|
STATIC void
|
|
xfs_bmbt_init_rec_from_cur(
|
|
struct xfs_btree_cur *cur,
|
|
union xfs_btree_rec *rec)
|
|
{
|
|
xfs_bmbt_disk_set_all(&rec->bmbt, &cur->bc_rec.b);
|
|
}
|
|
|
|
STATIC void
|
|
xfs_bmbt_init_ptr_from_cur(
|
|
struct xfs_btree_cur *cur,
|
|
union xfs_btree_ptr *ptr)
|
|
{
|
|
ptr->l = 0;
|
|
}
|
|
|
|
STATIC __int64_t
|
|
xfs_bmbt_key_diff(
|
|
struct xfs_btree_cur *cur,
|
|
union xfs_btree_key *key)
|
|
{
|
|
return (__int64_t)be64_to_cpu(key->bmbt.br_startoff) -
|
|
cur->bc_rec.b.br_startoff;
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
STATIC int
|
|
xfs_bmbt_keys_inorder(
|
|
struct xfs_btree_cur *cur,
|
|
union xfs_btree_key *k1,
|
|
union xfs_btree_key *k2)
|
|
{
|
|
return be64_to_cpu(k1->bmbt.br_startoff) <
|
|
be64_to_cpu(k2->bmbt.br_startoff);
|
|
}
|
|
|
|
STATIC int
|
|
xfs_bmbt_recs_inorder(
|
|
struct xfs_btree_cur *cur,
|
|
union xfs_btree_rec *r1,
|
|
union xfs_btree_rec *r2)
|
|
{
|
|
return xfs_bmbt_disk_get_startoff(&r1->bmbt) +
|
|
xfs_bmbt_disk_get_blockcount(&r1->bmbt) <=
|
|
xfs_bmbt_disk_get_startoff(&r2->bmbt);
|
|
}
|
|
#endif /* DEBUG */
|
|
|
|
#ifdef XFS_BTREE_TRACE
|
|
ktrace_t *xfs_bmbt_trace_buf;
|
|
|
|
STATIC void
|
|
xfs_bmbt_trace_enter(
|
|
struct xfs_btree_cur *cur,
|
|
const char *func,
|
|
char *s,
|
|
int type,
|
|
int line,
|
|
__psunsigned_t a0,
|
|
__psunsigned_t a1,
|
|
__psunsigned_t a2,
|
|
__psunsigned_t a3,
|
|
__psunsigned_t a4,
|
|
__psunsigned_t a5,
|
|
__psunsigned_t a6,
|
|
__psunsigned_t a7,
|
|
__psunsigned_t a8,
|
|
__psunsigned_t a9,
|
|
__psunsigned_t a10)
|
|
{
|
|
struct xfs_inode *ip = cur->bc_private.b.ip;
|
|
int whichfork = cur->bc_private.b.whichfork;
|
|
|
|
ktrace_enter(xfs_bmbt_trace_buf,
|
|
(void *)((__psint_t)type | (whichfork << 8) | (line << 16)),
|
|
(void *)func, (void *)s, (void *)ip, (void *)cur,
|
|
(void *)a0, (void *)a1, (void *)a2, (void *)a3,
|
|
(void *)a4, (void *)a5, (void *)a6, (void *)a7,
|
|
(void *)a8, (void *)a9, (void *)a10);
|
|
ktrace_enter(ip->i_btrace,
|
|
(void *)((__psint_t)type | (whichfork << 8) | (line << 16)),
|
|
(void *)func, (void *)s, (void *)ip, (void *)cur,
|
|
(void *)a0, (void *)a1, (void *)a2, (void *)a3,
|
|
(void *)a4, (void *)a5, (void *)a6, (void *)a7,
|
|
(void *)a8, (void *)a9, (void *)a10);
|
|
}
|
|
|
|
STATIC void
|
|
xfs_bmbt_trace_cursor(
|
|
struct xfs_btree_cur *cur,
|
|
__uint32_t *s0,
|
|
__uint64_t *l0,
|
|
__uint64_t *l1)
|
|
{
|
|
struct xfs_bmbt_rec_host r;
|
|
|
|
xfs_bmbt_set_all(&r, &cur->bc_rec.b);
|
|
|
|
*s0 = (cur->bc_nlevels << 24) |
|
|
(cur->bc_private.b.flags << 16) |
|
|
cur->bc_private.b.allocated;
|
|
*l0 = r.l0;
|
|
*l1 = r.l1;
|
|
}
|
|
|
|
STATIC void
|
|
xfs_bmbt_trace_key(
|
|
struct xfs_btree_cur *cur,
|
|
union xfs_btree_key *key,
|
|
__uint64_t *l0,
|
|
__uint64_t *l1)
|
|
{
|
|
*l0 = be64_to_cpu(key->bmbt.br_startoff);
|
|
*l1 = 0;
|
|
}
|
|
|
|
STATIC void
|
|
xfs_bmbt_trace_record(
|
|
struct xfs_btree_cur *cur,
|
|
union xfs_btree_rec *rec,
|
|
__uint64_t *l0,
|
|
__uint64_t *l1,
|
|
__uint64_t *l2)
|
|
{
|
|
struct xfs_bmbt_irec irec;
|
|
|
|
xfs_bmbt_disk_get_all(&rec->bmbt, &irec);
|
|
*l0 = irec.br_startoff;
|
|
*l1 = irec.br_startblock;
|
|
*l2 = irec.br_blockcount;
|
|
}
|
|
#endif /* XFS_BTREE_TRACE */
|
|
|
|
static const struct xfs_btree_ops xfs_bmbt_ops = {
|
|
.rec_len = sizeof(xfs_bmbt_rec_t),
|
|
.key_len = sizeof(xfs_bmbt_key_t),
|
|
|
|
.dup_cursor = xfs_bmbt_dup_cursor,
|
|
.update_cursor = xfs_bmbt_update_cursor,
|
|
.alloc_block = xfs_bmbt_alloc_block,
|
|
.free_block = xfs_bmbt_free_block,
|
|
.get_maxrecs = xfs_bmbt_get_maxrecs,
|
|
.get_minrecs = xfs_bmbt_get_minrecs,
|
|
.get_dmaxrecs = xfs_bmbt_get_dmaxrecs,
|
|
.init_key_from_rec = xfs_bmbt_init_key_from_rec,
|
|
.init_rec_from_key = xfs_bmbt_init_rec_from_key,
|
|
.init_rec_from_cur = xfs_bmbt_init_rec_from_cur,
|
|
.init_ptr_from_cur = xfs_bmbt_init_ptr_from_cur,
|
|
.key_diff = xfs_bmbt_key_diff,
|
|
|
|
#ifdef DEBUG
|
|
.keys_inorder = xfs_bmbt_keys_inorder,
|
|
.recs_inorder = xfs_bmbt_recs_inorder,
|
|
#endif
|
|
|
|
#ifdef XFS_BTREE_TRACE
|
|
.trace_enter = xfs_bmbt_trace_enter,
|
|
.trace_cursor = xfs_bmbt_trace_cursor,
|
|
.trace_key = xfs_bmbt_trace_key,
|
|
.trace_record = xfs_bmbt_trace_record,
|
|
#endif
|
|
};
|
|
|
|
/*
|
|
* Allocate a new bmap btree cursor.
|
|
*/
|
|
struct xfs_btree_cur * /* new bmap btree cursor */
|
|
xfs_bmbt_init_cursor(
|
|
struct xfs_mount *mp, /* file system mount point */
|
|
struct xfs_trans *tp, /* transaction pointer */
|
|
struct xfs_inode *ip, /* inode owning the btree */
|
|
int whichfork) /* data or attr fork */
|
|
{
|
|
struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, whichfork);
|
|
struct xfs_btree_cur *cur;
|
|
|
|
cur = kmem_zone_zalloc(xfs_btree_cur_zone, KM_SLEEP);
|
|
|
|
cur->bc_tp = tp;
|
|
cur->bc_mp = mp;
|
|
cur->bc_nlevels = be16_to_cpu(ifp->if_broot->bb_level) + 1;
|
|
cur->bc_btnum = XFS_BTNUM_BMAP;
|
|
cur->bc_blocklog = mp->m_sb.sb_blocklog;
|
|
|
|
cur->bc_ops = &xfs_bmbt_ops;
|
|
cur->bc_flags = XFS_BTREE_LONG_PTRS | XFS_BTREE_ROOT_IN_INODE;
|
|
|
|
cur->bc_private.b.forksize = XFS_IFORK_SIZE(ip, whichfork);
|
|
cur->bc_private.b.ip = ip;
|
|
cur->bc_private.b.firstblock = NULLFSBLOCK;
|
|
cur->bc_private.b.flist = NULL;
|
|
cur->bc_private.b.allocated = 0;
|
|
cur->bc_private.b.flags = 0;
|
|
cur->bc_private.b.whichfork = whichfork;
|
|
|
|
return cur;
|
|
}
|
|
|
|
/*
|
|
* Calculate number of records in a bmap btree block.
|
|
*/
|
|
int
|
|
xfs_bmbt_maxrecs(
|
|
struct xfs_mount *mp,
|
|
int blocklen,
|
|
int leaf)
|
|
{
|
|
blocklen -= XFS_BMBT_BLOCK_LEN(mp);
|
|
|
|
if (leaf)
|
|
return blocklen / sizeof(xfs_bmbt_rec_t);
|
|
return blocklen / (sizeof(xfs_bmbt_key_t) + sizeof(xfs_bmbt_ptr_t));
|
|
}
|
|
|
|
/*
|
|
* Calculate number of records in a bmap btree inode root.
|
|
*/
|
|
int
|
|
xfs_bmdr_maxrecs(
|
|
struct xfs_mount *mp,
|
|
int blocklen,
|
|
int leaf)
|
|
{
|
|
blocklen -= sizeof(xfs_bmdr_block_t);
|
|
|
|
if (leaf)
|
|
return blocklen / sizeof(xfs_bmdr_rec_t);
|
|
return blocklen / (sizeof(xfs_bmdr_key_t) + sizeof(xfs_bmdr_ptr_t));
|
|
}
|