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![Joseph Qi](/assets/img/avatar_default.png)
Since *init_cursor() can always return a valid cursor, the NULL check in caller is unneeded. So clean them up. This also keeps the behavior consistent with other callers. Signed-off-by: Joseph Qi <joseph.qi@linux.alibaba.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
761 lines
18 KiB
C
761 lines
18 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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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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#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_mount.h"
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#include "xfs_btree.h"
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#include "xfs_btree_staging.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_trans.h"
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#include "xfs_rmap.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 M_IGEO(cur->bc_mp)->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_ag.agbp, cur->bc_ag.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_ag.agbp;
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struct xfs_agi *agi = agbp->b_addr;
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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_ag.agbp;
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struct xfs_agi *agi = agbp->b_addr;
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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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/* Update the inode btree block counter for this btree. */
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static inline void
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xfs_inobt_mod_blockcount(
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struct xfs_btree_cur *cur,
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int howmuch)
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{
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struct xfs_buf *agbp = cur->bc_ag.agbp;
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struct xfs_agi *agi = agbp->b_addr;
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if (!xfs_sb_version_hasinobtcounts(&cur->bc_mp->m_sb))
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return;
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if (cur->bc_btnum == XFS_BTNUM_FINO)
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be32_add_cpu(&agi->agi_fblocks, howmuch);
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else if (cur->bc_btnum == XFS_BTNUM_INO)
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be32_add_cpu(&agi->agi_iblocks, howmuch);
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xfs_ialloc_log_agi(cur->bc_tp, agbp, XFS_AGI_IBLOCKS);
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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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enum xfs_ag_resv_type resv)
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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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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.oinfo = XFS_RMAP_OINFO_INOBT;
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args.fsbno = XFS_AGB_TO_FSB(args.mp, cur->bc_ag.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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args.resv = resv;
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error = xfs_alloc_vextent(&args);
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if (error)
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return error;
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if (args.fsbno == NULLFSBLOCK) {
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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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new->s = cpu_to_be32(XFS_FSB_TO_AGBNO(args.mp, args.fsbno));
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*stat = 1;
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xfs_inobt_mod_blockcount(cur, 1);
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return 0;
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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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return __xfs_inobt_alloc_block(cur, start, new, stat, XFS_AG_RESV_NONE);
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}
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STATIC int
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xfs_finobt_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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if (cur->bc_mp->m_finobt_nores)
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return xfs_inobt_alloc_block(cur, start, new, stat);
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return __xfs_inobt_alloc_block(cur, start, new, stat,
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XFS_AG_RESV_METADATA);
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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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enum xfs_ag_resv_type resv)
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{
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xfs_inobt_mod_blockcount(cur, -1);
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return xfs_free_extent(cur->bc_tp,
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XFS_DADDR_TO_FSB(cur->bc_mp, XFS_BUF_ADDR(bp)), 1,
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&XFS_RMAP_OINFO_INOBT, resv);
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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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return __xfs_inobt_free_block(cur, bp, XFS_AG_RESV_NONE);
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}
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STATIC int
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xfs_finobt_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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if (cur->bc_mp->m_finobt_nores)
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return xfs_inobt_free_block(cur, bp);
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return __xfs_inobt_free_block(cur, bp, XFS_AG_RESV_METADATA);
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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 M_IGEO(cur->bc_mp)->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_high_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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__u32 x;
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x = be32_to_cpu(rec->inobt.ir_startino);
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x += XFS_INODES_PER_CHUNK - 1;
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key->inobt.ir_startino = cpu_to_be32(x);
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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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if (xfs_sb_version_hassparseinodes(&cur->bc_mp->m_sb)) {
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rec->inobt.ir_u.sp.ir_holemask =
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cpu_to_be16(cur->bc_rec.i.ir_holemask);
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rec->inobt.ir_u.sp.ir_count = cur->bc_rec.i.ir_count;
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rec->inobt.ir_u.sp.ir_freecount = cur->bc_rec.i.ir_freecount;
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} else {
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/* ir_holemask/ir_count not supported on-disk */
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rec->inobt.ir_u.f.ir_freecount =
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cpu_to_be32(cur->bc_rec.i.ir_freecount);
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}
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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 = cur->bc_ag.agbp->b_addr;
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ASSERT(cur->bc_ag.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 = cur->bc_ag.agbp->b_addr;
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ASSERT(cur->bc_ag.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 int64_t
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xfs_inobt_diff_two_keys(
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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 (int64_t)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 xfs_failaddr_t
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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_mount;
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struct xfs_btree_block *block = XFS_BUF_TO_BLOCK(bp);
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xfs_failaddr_t fa;
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unsigned int level;
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if (!xfs_verify_magic(bp, block->bb_magic))
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return __this_address;
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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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if (xfs_sb_version_hascrc(&mp->m_sb)) {
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fa = xfs_btree_sblock_v5hdr_verify(bp);
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if (fa)
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return fa;
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}
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/* level verification */
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level = be16_to_cpu(block->bb_level);
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if (level >= M_IGEO(mp)->inobt_maxlevels)
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return __this_address;
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return xfs_btree_sblock_verify(bp,
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M_IGEO(mp)->inobt_mxr[level != 0]);
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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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xfs_failaddr_t fa;
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if (!xfs_btree_sblock_verify_crc(bp))
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xfs_verifier_error(bp, -EFSBADCRC, __this_address);
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else {
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fa = xfs_inobt_verify(bp);
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if (fa)
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xfs_verifier_error(bp, -EFSCORRUPTED, fa);
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}
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if (bp->b_error)
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trace_xfs_btree_corrupt(bp, _RET_IP_);
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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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xfs_failaddr_t fa;
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fa = xfs_inobt_verify(bp);
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if (fa) {
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trace_xfs_btree_corrupt(bp, _RET_IP_);
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xfs_verifier_error(bp, -EFSCORRUPTED, fa);
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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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.name = "xfs_inobt",
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.magic = { cpu_to_be32(XFS_IBT_MAGIC), cpu_to_be32(XFS_IBT_CRC_MAGIC) },
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.verify_read = xfs_inobt_read_verify,
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.verify_write = xfs_inobt_write_verify,
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.verify_struct = xfs_inobt_verify,
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};
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const struct xfs_buf_ops xfs_finobt_buf_ops = {
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.name = "xfs_finobt",
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.magic = { cpu_to_be32(XFS_FIBT_MAGIC),
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cpu_to_be32(XFS_FIBT_CRC_MAGIC) },
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.verify_read = xfs_inobt_read_verify,
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.verify_write = xfs_inobt_write_verify,
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.verify_struct = xfs_inobt_verify,
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};
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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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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_high_key_from_rec = xfs_inobt_init_high_key_from_rec,
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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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.diff_two_keys = xfs_inobt_diff_two_keys,
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.keys_inorder = xfs_inobt_keys_inorder,
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.recs_inorder = xfs_inobt_recs_inorder,
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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_finobt_alloc_block,
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.free_block = xfs_finobt_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_high_key_from_rec = xfs_inobt_init_high_key_from_rec,
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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_finobt_buf_ops,
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.diff_two_keys = xfs_inobt_diff_two_keys,
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.keys_inorder = xfs_inobt_keys_inorder,
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.recs_inorder = xfs_inobt_recs_inorder,
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};
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/*
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* Initialize a new inode btree cursor.
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*/
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static struct xfs_btree_cur *
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xfs_inobt_init_common(
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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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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_btree_cur *cur;
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cur = kmem_cache_zalloc(xfs_btree_cur_zone, GFP_NOFS | __GFP_NOFAIL);
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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_statoff = XFS_STATS_CALC_INDEX(xs_ibt_2);
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cur->bc_ops = &xfs_inobt_ops;
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} else {
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cur->bc_statoff = XFS_STATS_CALC_INDEX(xs_fibt_2);
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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;
|
|
|
|
cur->bc_ag.agno = agno;
|
|
return cur;
|
|
}
|
|
|
|
/* Create an inode btree cursor. */
|
|
struct xfs_btree_cur *
|
|
xfs_inobt_init_cursor(
|
|
struct xfs_mount *mp,
|
|
struct xfs_trans *tp,
|
|
struct xfs_buf *agbp,
|
|
xfs_agnumber_t agno,
|
|
xfs_btnum_t btnum)
|
|
{
|
|
struct xfs_btree_cur *cur;
|
|
struct xfs_agi *agi = agbp->b_addr;
|
|
|
|
cur = xfs_inobt_init_common(mp, tp, agno, btnum);
|
|
if (btnum == XFS_BTNUM_INO)
|
|
cur->bc_nlevels = be32_to_cpu(agi->agi_level);
|
|
else
|
|
cur->bc_nlevels = be32_to_cpu(agi->agi_free_level);
|
|
cur->bc_ag.agbp = agbp;
|
|
return cur;
|
|
}
|
|
|
|
/* Create an inode btree cursor with a fake root for staging. */
|
|
struct xfs_btree_cur *
|
|
xfs_inobt_stage_cursor(
|
|
struct xfs_mount *mp,
|
|
struct xbtree_afakeroot *afake,
|
|
xfs_agnumber_t agno,
|
|
xfs_btnum_t btnum)
|
|
{
|
|
struct xfs_btree_cur *cur;
|
|
|
|
cur = xfs_inobt_init_common(mp, NULL, agno, btnum);
|
|
xfs_btree_stage_afakeroot(cur, afake);
|
|
return cur;
|
|
}
|
|
|
|
/*
|
|
* Install a new inobt btree root. Caller is responsible for invalidating
|
|
* and freeing the old btree blocks.
|
|
*/
|
|
void
|
|
xfs_inobt_commit_staged_btree(
|
|
struct xfs_btree_cur *cur,
|
|
struct xfs_trans *tp,
|
|
struct xfs_buf *agbp)
|
|
{
|
|
struct xfs_agi *agi = agbp->b_addr;
|
|
struct xbtree_afakeroot *afake = cur->bc_ag.afake;
|
|
int fields;
|
|
|
|
ASSERT(cur->bc_flags & XFS_BTREE_STAGING);
|
|
|
|
if (cur->bc_btnum == XFS_BTNUM_INO) {
|
|
fields = XFS_AGI_ROOT | XFS_AGI_LEVEL;
|
|
agi->agi_root = cpu_to_be32(afake->af_root);
|
|
agi->agi_level = cpu_to_be32(afake->af_levels);
|
|
if (xfs_sb_version_hasinobtcounts(&cur->bc_mp->m_sb)) {
|
|
agi->agi_iblocks = cpu_to_be32(afake->af_blocks);
|
|
fields |= XFS_AGI_IBLOCKS;
|
|
}
|
|
xfs_ialloc_log_agi(tp, agbp, fields);
|
|
xfs_btree_commit_afakeroot(cur, tp, agbp, &xfs_inobt_ops);
|
|
} else {
|
|
fields = XFS_AGI_FREE_ROOT | XFS_AGI_FREE_LEVEL;
|
|
agi->agi_free_root = cpu_to_be32(afake->af_root);
|
|
agi->agi_free_level = cpu_to_be32(afake->af_levels);
|
|
if (xfs_sb_version_hasinobtcounts(&cur->bc_mp->m_sb)) {
|
|
agi->agi_fblocks = cpu_to_be32(afake->af_blocks);
|
|
fields |= XFS_AGI_IBLOCKS;
|
|
}
|
|
xfs_ialloc_log_agi(tp, agbp, fields);
|
|
xfs_btree_commit_afakeroot(cur, tp, agbp, &xfs_finobt_ops);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Calculate number of records in an inobt btree block.
|
|
*/
|
|
int
|
|
xfs_inobt_maxrecs(
|
|
struct xfs_mount *mp,
|
|
int blocklen,
|
|
int leaf)
|
|
{
|
|
blocklen -= XFS_INOBT_BLOCK_LEN(mp);
|
|
|
|
if (leaf)
|
|
return blocklen / sizeof(xfs_inobt_rec_t);
|
|
return blocklen / (sizeof(xfs_inobt_key_t) + sizeof(xfs_inobt_ptr_t));
|
|
}
|
|
|
|
/*
|
|
* Convert the inode record holemask to an inode allocation bitmap. The inode
|
|
* allocation bitmap is inode granularity and specifies whether an inode is
|
|
* physically allocated on disk (not whether the inode is considered allocated
|
|
* or free by the fs).
|
|
*
|
|
* A bit value of 1 means the inode is allocated, a value of 0 means it is free.
|
|
*/
|
|
uint64_t
|
|
xfs_inobt_irec_to_allocmask(
|
|
struct xfs_inobt_rec_incore *rec)
|
|
{
|
|
uint64_t bitmap = 0;
|
|
uint64_t inodespbit;
|
|
int nextbit;
|
|
uint allocbitmap;
|
|
|
|
/*
|
|
* The holemask has 16-bits for a 64 inode record. Therefore each
|
|
* holemask bit represents multiple inodes. Create a mask of bits to set
|
|
* in the allocmask for each holemask bit.
|
|
*/
|
|
inodespbit = (1 << XFS_INODES_PER_HOLEMASK_BIT) - 1;
|
|
|
|
/*
|
|
* Allocated inodes are represented by 0 bits in holemask. Invert the 0
|
|
* bits to 1 and convert to a uint so we can use xfs_next_bit(). Mask
|
|
* anything beyond the 16 holemask bits since this casts to a larger
|
|
* type.
|
|
*/
|
|
allocbitmap = ~rec->ir_holemask & ((1 << XFS_INOBT_HOLEMASK_BITS) - 1);
|
|
|
|
/*
|
|
* allocbitmap is the inverted holemask so every set bit represents
|
|
* allocated inodes. To expand from 16-bit holemask granularity to
|
|
* 64-bit (e.g., bit-per-inode), set inodespbit bits in the target
|
|
* bitmap for every holemask bit.
|
|
*/
|
|
nextbit = xfs_next_bit(&allocbitmap, 1, 0);
|
|
while (nextbit != -1) {
|
|
ASSERT(nextbit < (sizeof(rec->ir_holemask) * NBBY));
|
|
|
|
bitmap |= (inodespbit <<
|
|
(nextbit * XFS_INODES_PER_HOLEMASK_BIT));
|
|
|
|
nextbit = xfs_next_bit(&allocbitmap, 1, nextbit + 1);
|
|
}
|
|
|
|
return bitmap;
|
|
}
|
|
|
|
#if defined(DEBUG) || defined(XFS_WARN)
|
|
/*
|
|
* Verify that an in-core inode record has a valid inode count.
|
|
*/
|
|
int
|
|
xfs_inobt_rec_check_count(
|
|
struct xfs_mount *mp,
|
|
struct xfs_inobt_rec_incore *rec)
|
|
{
|
|
int inocount = 0;
|
|
int nextbit = 0;
|
|
uint64_t allocbmap;
|
|
int wordsz;
|
|
|
|
wordsz = sizeof(allocbmap) / sizeof(unsigned int);
|
|
allocbmap = xfs_inobt_irec_to_allocmask(rec);
|
|
|
|
nextbit = xfs_next_bit((uint *) &allocbmap, wordsz, nextbit);
|
|
while (nextbit != -1) {
|
|
inocount++;
|
|
nextbit = xfs_next_bit((uint *) &allocbmap, wordsz,
|
|
nextbit + 1);
|
|
}
|
|
|
|
if (inocount != rec->ir_count)
|
|
return -EFSCORRUPTED;
|
|
|
|
return 0;
|
|
}
|
|
#endif /* DEBUG */
|
|
|
|
static xfs_extlen_t
|
|
xfs_inobt_max_size(
|
|
struct xfs_mount *mp,
|
|
xfs_agnumber_t agno)
|
|
{
|
|
xfs_agblock_t agblocks = xfs_ag_block_count(mp, agno);
|
|
|
|
/* Bail out if we're uninitialized, which can happen in mkfs. */
|
|
if (M_IGEO(mp)->inobt_mxr[0] == 0)
|
|
return 0;
|
|
|
|
/*
|
|
* The log is permanently allocated, so the space it occupies will
|
|
* never be available for the kinds of things that would require btree
|
|
* expansion. We therefore can pretend the space isn't there.
|
|
*/
|
|
if (mp->m_sb.sb_logstart &&
|
|
XFS_FSB_TO_AGNO(mp, mp->m_sb.sb_logstart) == agno)
|
|
agblocks -= mp->m_sb.sb_logblocks;
|
|
|
|
return xfs_btree_calc_size(M_IGEO(mp)->inobt_mnr,
|
|
(uint64_t)agblocks * mp->m_sb.sb_inopblock /
|
|
XFS_INODES_PER_CHUNK);
|
|
}
|
|
|
|
/* Read AGI and create inobt cursor. */
|
|
int
|
|
xfs_inobt_cur(
|
|
struct xfs_mount *mp,
|
|
struct xfs_trans *tp,
|
|
xfs_agnumber_t agno,
|
|
xfs_btnum_t which,
|
|
struct xfs_btree_cur **curpp,
|
|
struct xfs_buf **agi_bpp)
|
|
{
|
|
struct xfs_btree_cur *cur;
|
|
int error;
|
|
|
|
ASSERT(*agi_bpp == NULL);
|
|
ASSERT(*curpp == NULL);
|
|
|
|
error = xfs_ialloc_read_agi(mp, tp, agno, agi_bpp);
|
|
if (error)
|
|
return error;
|
|
|
|
cur = xfs_inobt_init_cursor(mp, tp, *agi_bpp, agno, which);
|
|
*curpp = cur;
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
xfs_inobt_count_blocks(
|
|
struct xfs_mount *mp,
|
|
struct xfs_trans *tp,
|
|
xfs_agnumber_t agno,
|
|
xfs_btnum_t btnum,
|
|
xfs_extlen_t *tree_blocks)
|
|
{
|
|
struct xfs_buf *agbp = NULL;
|
|
struct xfs_btree_cur *cur = NULL;
|
|
int error;
|
|
|
|
error = xfs_inobt_cur(mp, tp, agno, btnum, &cur, &agbp);
|
|
if (error)
|
|
return error;
|
|
|
|
error = xfs_btree_count_blocks(cur, tree_blocks);
|
|
xfs_btree_del_cursor(cur, error);
|
|
xfs_trans_brelse(tp, agbp);
|
|
|
|
return error;
|
|
}
|
|
|
|
/* Read finobt block count from AGI header. */
|
|
static int
|
|
xfs_finobt_read_blocks(
|
|
struct xfs_mount *mp,
|
|
struct xfs_trans *tp,
|
|
xfs_agnumber_t agno,
|
|
xfs_extlen_t *tree_blocks)
|
|
{
|
|
struct xfs_buf *agbp;
|
|
struct xfs_agi *agi;
|
|
int error;
|
|
|
|
error = xfs_ialloc_read_agi(mp, tp, agno, &agbp);
|
|
if (error)
|
|
return error;
|
|
|
|
agi = agbp->b_addr;
|
|
*tree_blocks = be32_to_cpu(agi->agi_fblocks);
|
|
xfs_trans_brelse(tp, agbp);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Figure out how many blocks to reserve and how many are used by this btree.
|
|
*/
|
|
int
|
|
xfs_finobt_calc_reserves(
|
|
struct xfs_mount *mp,
|
|
struct xfs_trans *tp,
|
|
xfs_agnumber_t agno,
|
|
xfs_extlen_t *ask,
|
|
xfs_extlen_t *used)
|
|
{
|
|
xfs_extlen_t tree_len = 0;
|
|
int error;
|
|
|
|
if (!xfs_sb_version_hasfinobt(&mp->m_sb))
|
|
return 0;
|
|
|
|
if (xfs_sb_version_hasinobtcounts(&mp->m_sb))
|
|
error = xfs_finobt_read_blocks(mp, tp, agno, &tree_len);
|
|
else
|
|
error = xfs_inobt_count_blocks(mp, tp, agno, XFS_BTNUM_FINO,
|
|
&tree_len);
|
|
if (error)
|
|
return error;
|
|
|
|
*ask += xfs_inobt_max_size(mp, agno);
|
|
*used += tree_len;
|
|
return 0;
|
|
}
|
|
|
|
/* Calculate the inobt btree size for some records. */
|
|
xfs_extlen_t
|
|
xfs_iallocbt_calc_size(
|
|
struct xfs_mount *mp,
|
|
unsigned long long len)
|
|
{
|
|
return xfs_btree_calc_size(M_IGEO(mp)->inobt_mnr, len);
|
|
}
|