From 2b64ee5cdc106704b5c0f8954a52aa598eee25eb Mon Sep 17 00:00:00 2001 From: Brian Foster Date: Thu, 24 Apr 2014 16:00:53 +1000 Subject: [PATCH] xfs: refactor xfs_difree() inobt bits into xfs_difree_inobt() helper Refactor xfs_difree() in preparation for the finobt. xfs_difree() performs the validity checks against the ag and reads the agi header. The work of physically updating the inode allocation btree is pushed down into the new xfs_difree_inobt() helper. Signed-off-by: Brian Foster Reviewed-by: Dave Chinner Signed-off-by: Dave Chinner --- fs/xfs/xfs_ialloc.c | 161 +++++++++++++++++++++++++++++++--------------------- 1 file changed, 96 insertions(+), 65 deletions(-) diff --git a/fs/xfs/xfs_ialloc.c b/fs/xfs/xfs_ialloc.c index ab3540b..0283e98 100644 --- a/fs/xfs/xfs_ialloc.c +++ b/fs/xfs/xfs_ialloc.c @@ -1430,74 +1430,30 @@ out_error: return XFS_ERROR(error); } -/* - * Free disk inode. Carefully avoids touching the incore inode, all - * manipulations incore are the caller's responsibility. - * The on-disk inode is not changed by this operation, only the - * btree (free inode mask) is changed. - */ -int -xfs_difree( - xfs_trans_t *tp, /* transaction pointer */ - xfs_ino_t inode, /* inode to be freed */ - xfs_bmap_free_t *flist, /* extents to free */ - int *delete, /* set if inode cluster was deleted */ - xfs_ino_t *first_ino) /* first inode in deleted cluster */ +STATIC int +xfs_difree_inobt( + struct xfs_mount *mp, + struct xfs_trans *tp, + struct xfs_buf *agbp, + xfs_agino_t agino, + struct xfs_bmap_free *flist, + int *delete, + xfs_ino_t *first_ino, + struct xfs_inobt_rec_incore *orec) { - /* REFERENCED */ - xfs_agblock_t agbno; /* block number containing inode */ - xfs_buf_t *agbp; /* buffer containing allocation group header */ - xfs_agino_t agino; /* inode number relative to allocation group */ - xfs_agnumber_t agno; /* allocation group number */ - xfs_agi_t *agi; /* allocation group header */ - xfs_btree_cur_t *cur; /* inode btree cursor */ - int error; /* error return value */ - int i; /* result code */ - int ilen; /* inodes in an inode cluster */ - xfs_mount_t *mp; /* mount structure for filesystem */ - int off; /* offset of inode in inode chunk */ - xfs_inobt_rec_incore_t rec; /* btree record */ - struct xfs_perag *pag; - - mp = tp->t_mountp; + struct xfs_agi *agi = XFS_BUF_TO_AGI(agbp); + xfs_agnumber_t agno = be32_to_cpu(agi->agi_seqno); + struct xfs_perag *pag; + struct xfs_btree_cur *cur; + struct xfs_inobt_rec_incore rec; + int ilen; + int error; + int i; + int off; - /* - * Break up inode number into its components. - */ - agno = XFS_INO_TO_AGNO(mp, inode); - if (agno >= mp->m_sb.sb_agcount) { - xfs_warn(mp, "%s: agno >= mp->m_sb.sb_agcount (%d >= %d).", - __func__, agno, mp->m_sb.sb_agcount); - ASSERT(0); - return XFS_ERROR(EINVAL); - } - agino = XFS_INO_TO_AGINO(mp, inode); - if (inode != XFS_AGINO_TO_INO(mp, agno, agino)) { - xfs_warn(mp, "%s: inode != XFS_AGINO_TO_INO() (%llu != %llu).", - __func__, (unsigned long long)inode, - (unsigned long long)XFS_AGINO_TO_INO(mp, agno, agino)); - ASSERT(0); - return XFS_ERROR(EINVAL); - } - agbno = XFS_AGINO_TO_AGBNO(mp, agino); - if (agbno >= mp->m_sb.sb_agblocks) { - xfs_warn(mp, "%s: agbno >= mp->m_sb.sb_agblocks (%d >= %d).", - __func__, agbno, mp->m_sb.sb_agblocks); - ASSERT(0); - return XFS_ERROR(EINVAL); - } - /* - * Get the allocation group header. - */ - error = xfs_ialloc_read_agi(mp, tp, agno, &agbp); - if (error) { - xfs_warn(mp, "%s: xfs_ialloc_read_agi() returned error %d.", - __func__, error); - return error; - } - agi = XFS_BUF_TO_AGI(agbp); ASSERT(agi->agi_magicnum == cpu_to_be32(XFS_AGI_MAGIC)); - ASSERT(agbno < be32_to_cpu(agi->agi_length)); + ASSERT(XFS_AGINO_TO_AGBNO(mp, agino) < be32_to_cpu(agi->agi_length)); + /* * Initialize the cursor. */ @@ -1593,6 +1549,7 @@ xfs_difree( if (error) goto error0; + *orec = rec; xfs_btree_del_cursor(cur, XFS_BTREE_NOERROR); return 0; @@ -1601,6 +1558,80 @@ error0: return error; } +/* + * Free disk inode. Carefully avoids touching the incore inode, all + * manipulations incore are the caller's responsibility. + * The on-disk inode is not changed by this operation, only the + * btree (free inode mask) is changed. + */ +int +xfs_difree( + struct xfs_trans *tp, /* transaction pointer */ + xfs_ino_t inode, /* inode to be freed */ + struct xfs_bmap_free *flist, /* extents to free */ + int *delete,/* set if inode cluster was deleted */ + xfs_ino_t *first_ino)/* first inode in deleted cluster */ +{ + /* REFERENCED */ + xfs_agblock_t agbno; /* block number containing inode */ + struct xfs_buf *agbp; /* buffer for allocation group header */ + xfs_agino_t agino; /* allocation group inode number */ + xfs_agnumber_t agno; /* allocation group number */ + int error; /* error return value */ + struct xfs_mount *mp; /* mount structure for filesystem */ + struct xfs_inobt_rec_incore rec;/* btree record */ + + mp = tp->t_mountp; + + /* + * Break up inode number into its components. + */ + agno = XFS_INO_TO_AGNO(mp, inode); + if (agno >= mp->m_sb.sb_agcount) { + xfs_warn(mp, "%s: agno >= mp->m_sb.sb_agcount (%d >= %d).", + __func__, agno, mp->m_sb.sb_agcount); + ASSERT(0); + return XFS_ERROR(EINVAL); + } + agino = XFS_INO_TO_AGINO(mp, inode); + if (inode != XFS_AGINO_TO_INO(mp, agno, agino)) { + xfs_warn(mp, "%s: inode != XFS_AGINO_TO_INO() (%llu != %llu).", + __func__, (unsigned long long)inode, + (unsigned long long)XFS_AGINO_TO_INO(mp, agno, agino)); + ASSERT(0); + return XFS_ERROR(EINVAL); + } + agbno = XFS_AGINO_TO_AGBNO(mp, agino); + if (agbno >= mp->m_sb.sb_agblocks) { + xfs_warn(mp, "%s: agbno >= mp->m_sb.sb_agblocks (%d >= %d).", + __func__, agbno, mp->m_sb.sb_agblocks); + ASSERT(0); + return XFS_ERROR(EINVAL); + } + /* + * Get the allocation group header. + */ + error = xfs_ialloc_read_agi(mp, tp, agno, &agbp); + if (error) { + xfs_warn(mp, "%s: xfs_ialloc_read_agi() returned error %d.", + __func__, error); + return error; + } + + /* + * Fix up the inode allocation btree. + */ + error = xfs_difree_inobt(mp, tp, agbp, agino, flist, delete, first_ino, + &rec); + if (error) + goto error0; + + return 0; + +error0: + return error; +} + STATIC int xfs_imap_lookup( struct xfs_mount *mp, -- 2.7.4