libxfs: move source files
Move all the source files that are shared with userspace into libxfs/. This is done as one big chunk simpy to get it done quickly Signed-off-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Brian Foster <bfoster@redhat.com> Signed-off-by: Dave Chinner <david@fromorbit.com>
This commit is contained in:
Dave Chinner
committed by
Dave Chinner
Dave Chinner
parent
84be0ffc90
commit
30f712c9dd
967
fs/xfs/libxfs/xfs_bmap_btree.c
Normal file
967
fs/xfs/libxfs/xfs_bmap_btree.c
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@@ -0,0 +1,967 @@
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/*
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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_shared.h"
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#include "xfs_format.h"
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#include "xfs_log_format.h"
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#include "xfs_trans_resv.h"
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#include "xfs_bit.h"
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#include "xfs_sb.h"
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#include "xfs_ag.h"
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#include "xfs_mount.h"
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#include "xfs_inode.h"
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#include "xfs_trans.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_bmap_btree.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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#include "xfs_trace.h"
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#include "xfs_cksum.h"
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#include "xfs_dinode.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_inode *ip,
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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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struct xfs_mount *mp = ip->i_mount;
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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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if (xfs_sb_version_hascrc(&mp->m_sb))
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xfs_btree_init_block_int(mp, rblock, XFS_BUF_DADDR_NULL,
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XFS_BMAP_CRC_MAGIC, 0, 0, ip->i_ino,
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XFS_BTREE_LONG_PTRS | XFS_BTREE_CRC_BLOCKS);
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else
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xfs_btree_init_block_int(mp, rblock, XFS_BUF_DADDR_NULL,
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XFS_BMAP_MAGIC, 0, 0, ip->i_ino,
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XFS_BTREE_LONG_PTRS);
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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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dmxr = xfs_bmdr_maxrecs(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 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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/*
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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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STATIC 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)) |
|
||||
((xfs_bmbt_rec_base_t)v << 9) |
|
||||
(r->l0 & (xfs_bmbt_rec_base_t)xfs_mask64lo(9));
|
||||
}
|
||||
|
||||
/*
|
||||
* Set the extent state field in a bmap extent record.
|
||||
*/
|
||||
void
|
||||
xfs_bmbt_set_state(
|
||||
xfs_bmbt_rec_host_t *r,
|
||||
xfs_exntst_t v)
|
||||
{
|
||||
ASSERT(v == XFS_EXT_NORM || v == XFS_EXT_UNWRITTEN);
|
||||
if (v == XFS_EXT_NORM)
|
||||
r->l0 &= xfs_mask64lo(64 - BMBT_EXNTFLAG_BITLEN);
|
||||
else
|
||||
r->l0 |= xfs_mask64hi(BMBT_EXNTFLAG_BITLEN);
|
||||
}
|
||||
|
||||
/*
|
||||
* Convert in-memory form of btree root to on-disk form.
|
||||
*/
|
||||
void
|
||||
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;
|
||||
|
||||
if (xfs_sb_version_hascrc(&mp->m_sb)) {
|
||||
ASSERT(rblock->bb_magic == cpu_to_be32(XFS_BMAP_CRC_MAGIC));
|
||||
ASSERT(uuid_equal(&rblock->bb_u.l.bb_uuid, &mp->m_sb.sb_uuid));
|
||||
ASSERT(rblock->bb_u.l.bb_blkno ==
|
||||
cpu_to_be64(XFS_BUF_DADDR_NULL));
|
||||
} else
|
||||
ASSERT(rblock->bb_magic == cpu_to_be32(XFS_BMAP_MAGIC));
|
||||
ASSERT(rblock->bb_u.l.bb_leftsib == cpu_to_be64(NULLDFSBNO));
|
||||
ASSERT(rblock->bb_u.l.bb_rightsib == cpu_to_be64(NULLDFSBNO));
|
||||
ASSERT(rblock->bb_level != 0);
|
||||
dblock->bb_level = rblock->bb_level;
|
||||
dblock->bb_numrecs = rblock->bb_numrecs;
|
||||
dmxr = xfs_bmdr_maxrecs(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 *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 = 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_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;
|
||||
}
|
||||
|
||||
static bool
|
||||
xfs_bmbt_verify(
|
||||
struct xfs_buf *bp)
|
||||
{
|
||||
struct xfs_mount *mp = bp->b_target->bt_mount;
|
||||
struct xfs_btree_block *block = XFS_BUF_TO_BLOCK(bp);
|
||||
unsigned int level;
|
||||
|
||||
switch (block->bb_magic) {
|
||||
case cpu_to_be32(XFS_BMAP_CRC_MAGIC):
|
||||
if (!xfs_sb_version_hascrc(&mp->m_sb))
|
||||
return false;
|
||||
if (!uuid_equal(&block->bb_u.l.bb_uuid, &mp->m_sb.sb_uuid))
|
||||
return false;
|
||||
if (be64_to_cpu(block->bb_u.l.bb_blkno) != bp->b_bn)
|
||||
return false;
|
||||
/*
|
||||
* XXX: need a better way of verifying the owner here. Right now
|
||||
* just make sure there has been one set.
|
||||
*/
|
||||
if (be64_to_cpu(block->bb_u.l.bb_owner) == 0)
|
||||
return false;
|
||||
/* fall through */
|
||||
case cpu_to_be32(XFS_BMAP_MAGIC):
|
||||
break;
|
||||
default:
|
||||
return false;
|
||||
}
|
||||
|
||||
/*
|
||||
* numrecs and level verification.
|
||||
*
|
||||
* We don't know what fork we belong to, so just verify that the level
|
||||
* is less than the maximum of the two. Later checks will be more
|
||||
* precise.
|
||||
*/
|
||||
level = be16_to_cpu(block->bb_level);
|
||||
if (level > max(mp->m_bm_maxlevels[0], mp->m_bm_maxlevels[1]))
|
||||
return false;
|
||||
if (be16_to_cpu(block->bb_numrecs) > mp->m_bmap_dmxr[level != 0])
|
||||
return false;
|
||||
|
||||
/* sibling pointer verification */
|
||||
if (!block->bb_u.l.bb_leftsib ||
|
||||
(block->bb_u.l.bb_leftsib != cpu_to_be64(NULLDFSBNO) &&
|
||||
!XFS_FSB_SANITY_CHECK(mp, be64_to_cpu(block->bb_u.l.bb_leftsib))))
|
||||
return false;
|
||||
if (!block->bb_u.l.bb_rightsib ||
|
||||
(block->bb_u.l.bb_rightsib != cpu_to_be64(NULLDFSBNO) &&
|
||||
!XFS_FSB_SANITY_CHECK(mp, be64_to_cpu(block->bb_u.l.bb_rightsib))))
|
||||
return false;
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
static void
|
||||
xfs_bmbt_read_verify(
|
||||
struct xfs_buf *bp)
|
||||
{
|
||||
if (!xfs_btree_lblock_verify_crc(bp))
|
||||
xfs_buf_ioerror(bp, EFSBADCRC);
|
||||
else if (!xfs_bmbt_verify(bp))
|
||||
xfs_buf_ioerror(bp, EFSCORRUPTED);
|
||||
|
||||
if (bp->b_error) {
|
||||
trace_xfs_btree_corrupt(bp, _RET_IP_);
|
||||
xfs_verifier_error(bp);
|
||||
}
|
||||
}
|
||||
|
||||
static void
|
||||
xfs_bmbt_write_verify(
|
||||
struct xfs_buf *bp)
|
||||
{
|
||||
if (!xfs_bmbt_verify(bp)) {
|
||||
trace_xfs_btree_corrupt(bp, _RET_IP_);
|
||||
xfs_buf_ioerror(bp, EFSCORRUPTED);
|
||||
xfs_verifier_error(bp);
|
||||
return;
|
||||
}
|
||||
xfs_btree_lblock_calc_crc(bp);
|
||||
}
|
||||
|
||||
const struct xfs_buf_ops xfs_bmbt_buf_ops = {
|
||||
.verify_read = xfs_bmbt_read_verify,
|
||||
.verify_write = xfs_bmbt_write_verify,
|
||||
};
|
||||
|
||||
|
||||
#if defined(DEBUG) || defined(XFS_WARN)
|
||||
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 */
|
||||
|
||||
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,
|
||||
.buf_ops = &xfs_bmbt_buf_ops,
|
||||
#if defined(DEBUG) || defined(XFS_WARN)
|
||||
.keys_inorder = xfs_bmbt_keys_inorder,
|
||||
.recs_inorder = xfs_bmbt_recs_inorder,
|
||||
#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;
|
||||
if (xfs_sb_version_hascrc(&mp->m_sb))
|
||||
cur->bc_flags |= XFS_BTREE_CRC_BLOCKS;
|
||||
|
||||
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(
|
||||
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));
|
||||
}
|
||||
|
||||
/*
|
||||
* Change the owner of a btree format fork fo the inode passed in. Change it to
|
||||
* the owner of that is passed in so that we can change owners before or after
|
||||
* we switch forks between inodes. The operation that the caller is doing will
|
||||
* determine whether is needs to change owner before or after the switch.
|
||||
*
|
||||
* For demand paged transactional modification, the fork switch should be done
|
||||
* after reading in all the blocks, modifying them and pinning them in the
|
||||
* transaction. For modification when the buffers are already pinned in memory,
|
||||
* the fork switch can be done before changing the owner as we won't need to
|
||||
* validate the owner until the btree buffers are unpinned and writes can occur
|
||||
* again.
|
||||
*
|
||||
* For recovery based ownership change, there is no transactional context and
|
||||
* so a buffer list must be supplied so that we can record the buffers that we
|
||||
* modified for the caller to issue IO on.
|
||||
*/
|
||||
int
|
||||
xfs_bmbt_change_owner(
|
||||
struct xfs_trans *tp,
|
||||
struct xfs_inode *ip,
|
||||
int whichfork,
|
||||
xfs_ino_t new_owner,
|
||||
struct list_head *buffer_list)
|
||||
{
|
||||
struct xfs_btree_cur *cur;
|
||||
int error;
|
||||
|
||||
ASSERT(tp || buffer_list);
|
||||
ASSERT(!(tp && buffer_list));
|
||||
if (whichfork == XFS_DATA_FORK)
|
||||
ASSERT(ip->i_d.di_format == XFS_DINODE_FMT_BTREE);
|
||||
else
|
||||
ASSERT(ip->i_d.di_aformat == XFS_DINODE_FMT_BTREE);
|
||||
|
||||
cur = xfs_bmbt_init_cursor(ip->i_mount, tp, ip, whichfork);
|
||||
if (!cur)
|
||||
return ENOMEM;
|
||||
|
||||
error = xfs_btree_change_owner(cur, new_owner, buffer_list);
|
||||
xfs_btree_del_cursor(cur, error ? XFS_BTREE_ERROR : XFS_BTREE_NOERROR);
|
||||
return error;
|
||||
}
|
||||
Reference in New Issue
Block a user