![Dave Chinner](/assets/img/avatar_default.png)
Convert all the errors the core XFs code to negative error signs like the rest of the kernel and remove all the sign conversion we do in the interface layers. Errors for conversion (and comparison) found via searches like: $ git grep " E" fs/xfs $ git grep "return E" fs/xfs $ git grep " E[A-Z].*;$" fs/xfs Negation points found via searches like: $ git grep "= -[a-z,A-Z]" fs/xfs $ git grep "return -[a-z,A-D,F-Z]" fs/xfs $ git grep " -[a-z].*;" fs/xfs [ with some bits I missed from Brian Foster ] Signed-off-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Brian Foster <bfoster@redhat.com> Signed-off-by: Dave Chinner <david@fromorbit.com>
423 lines
10 KiB
C
423 lines
10 KiB
C
/*
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* Copyright (c) 2000-2001,2005 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_btree.h"
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#include "xfs_ialloc.h"
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#include "xfs_ialloc_btree.h"
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#include "xfs_alloc.h"
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#include "xfs_error.h"
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#include "xfs_trace.h"
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#include "xfs_cksum.h"
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#include "xfs_trans.h"
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STATIC int
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xfs_inobt_get_minrecs(
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struct xfs_btree_cur *cur,
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int level)
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{
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return cur->bc_mp->m_inobt_mnr[level != 0];
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}
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STATIC struct xfs_btree_cur *
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xfs_inobt_dup_cursor(
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struct xfs_btree_cur *cur)
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{
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return xfs_inobt_init_cursor(cur->bc_mp, cur->bc_tp,
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cur->bc_private.a.agbp, cur->bc_private.a.agno,
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cur->bc_btnum);
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}
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STATIC void
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xfs_inobt_set_root(
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struct xfs_btree_cur *cur,
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union xfs_btree_ptr *nptr,
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int inc) /* level change */
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{
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struct xfs_buf *agbp = cur->bc_private.a.agbp;
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struct xfs_agi *agi = XFS_BUF_TO_AGI(agbp);
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agi->agi_root = nptr->s;
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be32_add_cpu(&agi->agi_level, inc);
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xfs_ialloc_log_agi(cur->bc_tp, agbp, XFS_AGI_ROOT | XFS_AGI_LEVEL);
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}
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STATIC void
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xfs_finobt_set_root(
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struct xfs_btree_cur *cur,
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union xfs_btree_ptr *nptr,
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int inc) /* level change */
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{
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struct xfs_buf *agbp = cur->bc_private.a.agbp;
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struct xfs_agi *agi = XFS_BUF_TO_AGI(agbp);
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agi->agi_free_root = nptr->s;
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be32_add_cpu(&agi->agi_free_level, inc);
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xfs_ialloc_log_agi(cur->bc_tp, agbp,
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XFS_AGI_FREE_ROOT | XFS_AGI_FREE_LEVEL);
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}
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STATIC int
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xfs_inobt_alloc_block(
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struct xfs_btree_cur *cur,
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union xfs_btree_ptr *start,
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union xfs_btree_ptr *new,
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int *stat)
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{
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xfs_alloc_arg_t args; /* block allocation args */
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int error; /* error return value */
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xfs_agblock_t sbno = be32_to_cpu(start->s);
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XFS_BTREE_TRACE_CURSOR(cur, XBT_ENTRY);
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memset(&args, 0, sizeof(args));
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args.tp = cur->bc_tp;
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args.mp = cur->bc_mp;
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args.fsbno = XFS_AGB_TO_FSB(args.mp, cur->bc_private.a.agno, sbno);
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args.minlen = 1;
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args.maxlen = 1;
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args.prod = 1;
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args.type = XFS_ALLOCTYPE_NEAR_BNO;
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error = xfs_alloc_vextent(&args);
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if (error) {
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XFS_BTREE_TRACE_CURSOR(cur, XBT_ERROR);
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return error;
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}
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if (args.fsbno == NULLFSBLOCK) {
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XFS_BTREE_TRACE_CURSOR(cur, XBT_EXIT);
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*stat = 0;
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return 0;
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}
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ASSERT(args.len == 1);
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XFS_BTREE_TRACE_CURSOR(cur, XBT_EXIT);
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new->s = cpu_to_be32(XFS_FSB_TO_AGBNO(args.mp, args.fsbno));
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*stat = 1;
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return 0;
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}
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STATIC int
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xfs_inobt_free_block(
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struct xfs_btree_cur *cur,
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struct xfs_buf *bp)
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{
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xfs_fsblock_t fsbno;
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int error;
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fsbno = XFS_DADDR_TO_FSB(cur->bc_mp, XFS_BUF_ADDR(bp));
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error = xfs_free_extent(cur->bc_tp, fsbno, 1);
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if (error)
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return error;
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xfs_trans_binval(cur->bc_tp, bp);
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return error;
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}
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STATIC int
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xfs_inobt_get_maxrecs(
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struct xfs_btree_cur *cur,
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int level)
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{
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return cur->bc_mp->m_inobt_mxr[level != 0];
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}
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STATIC void
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xfs_inobt_init_key_from_rec(
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union xfs_btree_key *key,
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union xfs_btree_rec *rec)
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{
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key->inobt.ir_startino = rec->inobt.ir_startino;
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}
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STATIC void
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xfs_inobt_init_rec_from_key(
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union xfs_btree_key *key,
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union xfs_btree_rec *rec)
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{
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rec->inobt.ir_startino = key->inobt.ir_startino;
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}
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STATIC void
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xfs_inobt_init_rec_from_cur(
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struct xfs_btree_cur *cur,
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union xfs_btree_rec *rec)
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{
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rec->inobt.ir_startino = cpu_to_be32(cur->bc_rec.i.ir_startino);
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rec->inobt.ir_freecount = cpu_to_be32(cur->bc_rec.i.ir_freecount);
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rec->inobt.ir_free = cpu_to_be64(cur->bc_rec.i.ir_free);
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}
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/*
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* initial value of ptr for lookup
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*/
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STATIC void
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xfs_inobt_init_ptr_from_cur(
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struct xfs_btree_cur *cur,
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union xfs_btree_ptr *ptr)
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{
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struct xfs_agi *agi = XFS_BUF_TO_AGI(cur->bc_private.a.agbp);
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ASSERT(cur->bc_private.a.agno == be32_to_cpu(agi->agi_seqno));
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ptr->s = agi->agi_root;
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}
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STATIC void
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xfs_finobt_init_ptr_from_cur(
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struct xfs_btree_cur *cur,
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union xfs_btree_ptr *ptr)
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{
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struct xfs_agi *agi = XFS_BUF_TO_AGI(cur->bc_private.a.agbp);
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ASSERT(cur->bc_private.a.agno == be32_to_cpu(agi->agi_seqno));
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ptr->s = agi->agi_free_root;
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}
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STATIC __int64_t
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xfs_inobt_key_diff(
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struct xfs_btree_cur *cur,
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union xfs_btree_key *key)
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{
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return (__int64_t)be32_to_cpu(key->inobt.ir_startino) -
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cur->bc_rec.i.ir_startino;
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}
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static int
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xfs_inobt_verify(
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struct xfs_buf *bp)
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{
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struct xfs_mount *mp = bp->b_target->bt_mount;
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struct xfs_btree_block *block = XFS_BUF_TO_BLOCK(bp);
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struct xfs_perag *pag = bp->b_pag;
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unsigned int level;
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/*
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* During growfs operations, we can't verify the exact owner as the
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* perag is not fully initialised and hence not attached to the buffer.
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*
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* Similarly, during log recovery we will have a perag structure
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* attached, but the agi information will not yet have been initialised
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* from the on disk AGI. We don't currently use any of this information,
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* but beware of the landmine (i.e. need to check pag->pagi_init) if we
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* ever do.
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*/
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switch (block->bb_magic) {
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case cpu_to_be32(XFS_IBT_CRC_MAGIC):
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case cpu_to_be32(XFS_FIBT_CRC_MAGIC):
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if (!xfs_sb_version_hascrc(&mp->m_sb))
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return false;
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if (!uuid_equal(&block->bb_u.s.bb_uuid, &mp->m_sb.sb_uuid))
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return false;
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if (block->bb_u.s.bb_blkno != cpu_to_be64(bp->b_bn))
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return false;
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if (pag &&
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be32_to_cpu(block->bb_u.s.bb_owner) != pag->pag_agno)
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return false;
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/* fall through */
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case cpu_to_be32(XFS_IBT_MAGIC):
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case cpu_to_be32(XFS_FIBT_MAGIC):
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break;
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default:
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return 0;
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}
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/* numrecs and level verification */
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level = be16_to_cpu(block->bb_level);
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if (level >= mp->m_in_maxlevels)
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return false;
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if (be16_to_cpu(block->bb_numrecs) > mp->m_inobt_mxr[level != 0])
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return false;
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/* sibling pointer verification */
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if (!block->bb_u.s.bb_leftsib ||
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(be32_to_cpu(block->bb_u.s.bb_leftsib) >= mp->m_sb.sb_agblocks &&
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block->bb_u.s.bb_leftsib != cpu_to_be32(NULLAGBLOCK)))
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return false;
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if (!block->bb_u.s.bb_rightsib ||
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(be32_to_cpu(block->bb_u.s.bb_rightsib) >= mp->m_sb.sb_agblocks &&
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block->bb_u.s.bb_rightsib != cpu_to_be32(NULLAGBLOCK)))
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return false;
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return true;
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}
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static void
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xfs_inobt_read_verify(
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struct xfs_buf *bp)
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{
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if (!xfs_btree_sblock_verify_crc(bp))
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xfs_buf_ioerror(bp, -EFSBADCRC);
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else if (!xfs_inobt_verify(bp))
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xfs_buf_ioerror(bp, -EFSCORRUPTED);
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if (bp->b_error) {
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trace_xfs_btree_corrupt(bp, _RET_IP_);
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xfs_verifier_error(bp);
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}
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}
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static void
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xfs_inobt_write_verify(
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struct xfs_buf *bp)
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{
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if (!xfs_inobt_verify(bp)) {
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trace_xfs_btree_corrupt(bp, _RET_IP_);
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xfs_buf_ioerror(bp, -EFSCORRUPTED);
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xfs_verifier_error(bp);
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return;
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}
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xfs_btree_sblock_calc_crc(bp);
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}
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const struct xfs_buf_ops xfs_inobt_buf_ops = {
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.verify_read = xfs_inobt_read_verify,
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.verify_write = xfs_inobt_write_verify,
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};
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#if defined(DEBUG) || defined(XFS_WARN)
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STATIC int
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xfs_inobt_keys_inorder(
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struct xfs_btree_cur *cur,
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union xfs_btree_key *k1,
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union xfs_btree_key *k2)
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{
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return be32_to_cpu(k1->inobt.ir_startino) <
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be32_to_cpu(k2->inobt.ir_startino);
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}
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STATIC int
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xfs_inobt_recs_inorder(
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struct xfs_btree_cur *cur,
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union xfs_btree_rec *r1,
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union xfs_btree_rec *r2)
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{
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return be32_to_cpu(r1->inobt.ir_startino) + XFS_INODES_PER_CHUNK <=
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be32_to_cpu(r2->inobt.ir_startino);
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}
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#endif /* DEBUG */
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static const struct xfs_btree_ops xfs_inobt_ops = {
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.rec_len = sizeof(xfs_inobt_rec_t),
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.key_len = sizeof(xfs_inobt_key_t),
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.dup_cursor = xfs_inobt_dup_cursor,
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.set_root = xfs_inobt_set_root,
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.alloc_block = xfs_inobt_alloc_block,
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.free_block = xfs_inobt_free_block,
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.get_minrecs = xfs_inobt_get_minrecs,
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.get_maxrecs = xfs_inobt_get_maxrecs,
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.init_key_from_rec = xfs_inobt_init_key_from_rec,
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.init_rec_from_key = xfs_inobt_init_rec_from_key,
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.init_rec_from_cur = xfs_inobt_init_rec_from_cur,
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.init_ptr_from_cur = xfs_inobt_init_ptr_from_cur,
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.key_diff = xfs_inobt_key_diff,
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.buf_ops = &xfs_inobt_buf_ops,
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#if defined(DEBUG) || defined(XFS_WARN)
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.keys_inorder = xfs_inobt_keys_inorder,
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.recs_inorder = xfs_inobt_recs_inorder,
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#endif
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};
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static const struct xfs_btree_ops xfs_finobt_ops = {
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.rec_len = sizeof(xfs_inobt_rec_t),
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.key_len = sizeof(xfs_inobt_key_t),
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.dup_cursor = xfs_inobt_dup_cursor,
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.set_root = xfs_finobt_set_root,
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.alloc_block = xfs_inobt_alloc_block,
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.free_block = xfs_inobt_free_block,
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.get_minrecs = xfs_inobt_get_minrecs,
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.get_maxrecs = xfs_inobt_get_maxrecs,
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.init_key_from_rec = xfs_inobt_init_key_from_rec,
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.init_rec_from_key = xfs_inobt_init_rec_from_key,
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.init_rec_from_cur = xfs_inobt_init_rec_from_cur,
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.init_ptr_from_cur = xfs_finobt_init_ptr_from_cur,
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.key_diff = xfs_inobt_key_diff,
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.buf_ops = &xfs_inobt_buf_ops,
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#if defined(DEBUG) || defined(XFS_WARN)
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.keys_inorder = xfs_inobt_keys_inorder,
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.recs_inorder = xfs_inobt_recs_inorder,
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#endif
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};
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/*
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* Allocate a new inode btree cursor.
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*/
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struct xfs_btree_cur * /* new inode btree cursor */
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xfs_inobt_init_cursor(
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struct xfs_mount *mp, /* file system mount point */
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struct xfs_trans *tp, /* transaction pointer */
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struct xfs_buf *agbp, /* buffer for agi structure */
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xfs_agnumber_t agno, /* allocation group number */
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xfs_btnum_t btnum) /* ialloc or free ino btree */
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{
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struct xfs_agi *agi = XFS_BUF_TO_AGI(agbp);
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struct xfs_btree_cur *cur;
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cur = kmem_zone_zalloc(xfs_btree_cur_zone, KM_SLEEP);
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cur->bc_tp = tp;
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cur->bc_mp = mp;
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cur->bc_btnum = btnum;
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if (btnum == XFS_BTNUM_INO) {
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cur->bc_nlevels = be32_to_cpu(agi->agi_level);
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cur->bc_ops = &xfs_inobt_ops;
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} else {
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cur->bc_nlevels = be32_to_cpu(agi->agi_free_level);
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cur->bc_ops = &xfs_finobt_ops;
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}
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cur->bc_blocklog = mp->m_sb.sb_blocklog;
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if (xfs_sb_version_hascrc(&mp->m_sb))
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cur->bc_flags |= XFS_BTREE_CRC_BLOCKS;
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cur->bc_private.a.agbp = agbp;
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cur->bc_private.a.agno = agno;
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return cur;
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}
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/*
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* Calculate number of records in an inobt btree block.
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*/
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int
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xfs_inobt_maxrecs(
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struct xfs_mount *mp,
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int blocklen,
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int leaf)
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{
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blocklen -= XFS_INOBT_BLOCK_LEN(mp);
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if (leaf)
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return blocklen / sizeof(xfs_inobt_rec_t);
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return blocklen / (sizeof(xfs_inobt_key_t) + sizeof(xfs_inobt_ptr_t));
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}
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