405 lines
11 KiB
C
405 lines
11 KiB
C
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/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (c) 2000-2005 Silicon Graphics, Inc.
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* Copyright (c) 2018 Red Hat, 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_trans_resv.h"
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#include "xfs_sb.h"
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#include "xfs_mount.h"
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#include "xfs_btree.h"
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#include "xfs_alloc_btree.h"
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#include "xfs_rmap_btree.h"
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#include "xfs_alloc.h"
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#include "xfs_rmap.h"
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#include "xfs_ag.h"
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static struct xfs_buf *
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xfs_get_aghdr_buf(
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struct xfs_mount *mp,
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xfs_daddr_t blkno,
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size_t numblks,
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int flags,
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const struct xfs_buf_ops *ops)
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{
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struct xfs_buf *bp;
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bp = xfs_buf_get_uncached(mp->m_ddev_targp, numblks, flags);
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if (!bp)
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return NULL;
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xfs_buf_zero(bp, 0, BBTOB(bp->b_length));
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bp->b_bn = blkno;
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bp->b_maps[0].bm_bn = blkno;
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bp->b_ops = ops;
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return bp;
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}
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/*
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* Generic btree root block init function
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*/
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static void
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xfs_btroot_init(
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struct xfs_mount *mp,
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struct xfs_buf *bp,
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struct aghdr_init_data *id)
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{
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xfs_btree_init_block(mp, bp, id->type, 0, 0, id->agno, 0);
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}
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/*
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* Alloc btree root block init functions
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*/
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static void
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xfs_bnoroot_init(
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struct xfs_mount *mp,
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struct xfs_buf *bp,
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struct aghdr_init_data *id)
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{
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struct xfs_alloc_rec *arec;
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xfs_btree_init_block(mp, bp, XFS_BTNUM_BNO, 0, 1, id->agno, 0);
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arec = XFS_ALLOC_REC_ADDR(mp, XFS_BUF_TO_BLOCK(bp), 1);
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arec->ar_startblock = cpu_to_be32(mp->m_ag_prealloc_blocks);
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arec->ar_blockcount = cpu_to_be32(id->agsize -
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be32_to_cpu(arec->ar_startblock));
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}
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static void
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xfs_cntroot_init(
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struct xfs_mount *mp,
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struct xfs_buf *bp,
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struct aghdr_init_data *id)
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{
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struct xfs_alloc_rec *arec;
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xfs_btree_init_block(mp, bp, XFS_BTNUM_CNT, 0, 1, id->agno, 0);
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arec = XFS_ALLOC_REC_ADDR(mp, XFS_BUF_TO_BLOCK(bp), 1);
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arec->ar_startblock = cpu_to_be32(mp->m_ag_prealloc_blocks);
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arec->ar_blockcount = cpu_to_be32(id->agsize -
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be32_to_cpu(arec->ar_startblock));
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}
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/*
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* Reverse map root block init
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*/
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static void
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xfs_rmaproot_init(
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struct xfs_mount *mp,
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struct xfs_buf *bp,
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struct aghdr_init_data *id)
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{
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struct xfs_btree_block *block = XFS_BUF_TO_BLOCK(bp);
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struct xfs_rmap_rec *rrec;
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xfs_btree_init_block(mp, bp, XFS_BTNUM_RMAP, 0, 4, id->agno, 0);
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/*
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* mark the AG header regions as static metadata The BNO
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* btree block is the first block after the headers, so
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* it's location defines the size of region the static
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* metadata consumes.
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*
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* Note: unlike mkfs, we never have to account for log
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* space when growing the data regions
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*/
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rrec = XFS_RMAP_REC_ADDR(block, 1);
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rrec->rm_startblock = 0;
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rrec->rm_blockcount = cpu_to_be32(XFS_BNO_BLOCK(mp));
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rrec->rm_owner = cpu_to_be64(XFS_RMAP_OWN_FS);
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rrec->rm_offset = 0;
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/* account freespace btree root blocks */
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rrec = XFS_RMAP_REC_ADDR(block, 2);
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rrec->rm_startblock = cpu_to_be32(XFS_BNO_BLOCK(mp));
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rrec->rm_blockcount = cpu_to_be32(2);
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rrec->rm_owner = cpu_to_be64(XFS_RMAP_OWN_AG);
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rrec->rm_offset = 0;
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/* account inode btree root blocks */
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rrec = XFS_RMAP_REC_ADDR(block, 3);
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rrec->rm_startblock = cpu_to_be32(XFS_IBT_BLOCK(mp));
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rrec->rm_blockcount = cpu_to_be32(XFS_RMAP_BLOCK(mp) -
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XFS_IBT_BLOCK(mp));
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rrec->rm_owner = cpu_to_be64(XFS_RMAP_OWN_INOBT);
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rrec->rm_offset = 0;
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/* account for rmap btree root */
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rrec = XFS_RMAP_REC_ADDR(block, 4);
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rrec->rm_startblock = cpu_to_be32(XFS_RMAP_BLOCK(mp));
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rrec->rm_blockcount = cpu_to_be32(1);
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rrec->rm_owner = cpu_to_be64(XFS_RMAP_OWN_AG);
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rrec->rm_offset = 0;
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/* account for refc btree root */
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if (xfs_sb_version_hasreflink(&mp->m_sb)) {
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rrec = XFS_RMAP_REC_ADDR(block, 5);
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rrec->rm_startblock = cpu_to_be32(xfs_refc_block(mp));
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rrec->rm_blockcount = cpu_to_be32(1);
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rrec->rm_owner = cpu_to_be64(XFS_RMAP_OWN_REFC);
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rrec->rm_offset = 0;
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be16_add_cpu(&block->bb_numrecs, 1);
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}
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}
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/*
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* Initialise new secondary superblocks with the pre-grow geometry, but mark
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* them as "in progress" so we know they haven't yet been activated. This will
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* get cleared when the update with the new geometry information is done after
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* changes to the primary are committed. This isn't strictly necessary, but we
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* get it for free with the delayed buffer write lists and it means we can tell
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* if a grow operation didn't complete properly after the fact.
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*/
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static void
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xfs_sbblock_init(
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struct xfs_mount *mp,
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struct xfs_buf *bp,
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struct aghdr_init_data *id)
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{
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struct xfs_dsb *dsb = XFS_BUF_TO_SBP(bp);
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xfs_sb_to_disk(dsb, &mp->m_sb);
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dsb->sb_inprogress = 1;
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}
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static void
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xfs_agfblock_init(
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struct xfs_mount *mp,
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struct xfs_buf *bp,
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struct aghdr_init_data *id)
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{
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struct xfs_agf *agf = XFS_BUF_TO_AGF(bp);
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xfs_extlen_t tmpsize;
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agf->agf_magicnum = cpu_to_be32(XFS_AGF_MAGIC);
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agf->agf_versionnum = cpu_to_be32(XFS_AGF_VERSION);
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agf->agf_seqno = cpu_to_be32(id->agno);
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agf->agf_length = cpu_to_be32(id->agsize);
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agf->agf_roots[XFS_BTNUM_BNOi] = cpu_to_be32(XFS_BNO_BLOCK(mp));
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agf->agf_roots[XFS_BTNUM_CNTi] = cpu_to_be32(XFS_CNT_BLOCK(mp));
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agf->agf_levels[XFS_BTNUM_BNOi] = cpu_to_be32(1);
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agf->agf_levels[XFS_BTNUM_CNTi] = cpu_to_be32(1);
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if (xfs_sb_version_hasrmapbt(&mp->m_sb)) {
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agf->agf_roots[XFS_BTNUM_RMAPi] =
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cpu_to_be32(XFS_RMAP_BLOCK(mp));
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agf->agf_levels[XFS_BTNUM_RMAPi] = cpu_to_be32(1);
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agf->agf_rmap_blocks = cpu_to_be32(1);
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}
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agf->agf_flfirst = cpu_to_be32(1);
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agf->agf_fllast = 0;
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agf->agf_flcount = 0;
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tmpsize = id->agsize - mp->m_ag_prealloc_blocks;
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agf->agf_freeblks = cpu_to_be32(tmpsize);
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agf->agf_longest = cpu_to_be32(tmpsize);
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if (xfs_sb_version_hascrc(&mp->m_sb))
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uuid_copy(&agf->agf_uuid, &mp->m_sb.sb_meta_uuid);
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if (xfs_sb_version_hasreflink(&mp->m_sb)) {
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agf->agf_refcount_root = cpu_to_be32(
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xfs_refc_block(mp));
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agf->agf_refcount_level = cpu_to_be32(1);
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agf->agf_refcount_blocks = cpu_to_be32(1);
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}
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}
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static void
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xfs_agflblock_init(
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struct xfs_mount *mp,
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struct xfs_buf *bp,
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struct aghdr_init_data *id)
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{
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struct xfs_agfl *agfl = XFS_BUF_TO_AGFL(bp);
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__be32 *agfl_bno;
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int bucket;
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if (xfs_sb_version_hascrc(&mp->m_sb)) {
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agfl->agfl_magicnum = cpu_to_be32(XFS_AGFL_MAGIC);
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agfl->agfl_seqno = cpu_to_be32(id->agno);
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uuid_copy(&agfl->agfl_uuid, &mp->m_sb.sb_meta_uuid);
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}
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agfl_bno = XFS_BUF_TO_AGFL_BNO(mp, bp);
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for (bucket = 0; bucket < xfs_agfl_size(mp); bucket++)
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agfl_bno[bucket] = cpu_to_be32(NULLAGBLOCK);
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}
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static void
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xfs_agiblock_init(
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struct xfs_mount *mp,
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struct xfs_buf *bp,
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struct aghdr_init_data *id)
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{
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struct xfs_agi *agi = XFS_BUF_TO_AGI(bp);
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int bucket;
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agi->agi_magicnum = cpu_to_be32(XFS_AGI_MAGIC);
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agi->agi_versionnum = cpu_to_be32(XFS_AGI_VERSION);
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agi->agi_seqno = cpu_to_be32(id->agno);
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agi->agi_length = cpu_to_be32(id->agsize);
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agi->agi_count = 0;
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agi->agi_root = cpu_to_be32(XFS_IBT_BLOCK(mp));
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agi->agi_level = cpu_to_be32(1);
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agi->agi_freecount = 0;
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agi->agi_newino = cpu_to_be32(NULLAGINO);
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agi->agi_dirino = cpu_to_be32(NULLAGINO);
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if (xfs_sb_version_hascrc(&mp->m_sb))
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uuid_copy(&agi->agi_uuid, &mp->m_sb.sb_meta_uuid);
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if (xfs_sb_version_hasfinobt(&mp->m_sb)) {
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agi->agi_free_root = cpu_to_be32(XFS_FIBT_BLOCK(mp));
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agi->agi_free_level = cpu_to_be32(1);
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}
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for (bucket = 0; bucket < XFS_AGI_UNLINKED_BUCKETS; bucket++)
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agi->agi_unlinked[bucket] = cpu_to_be32(NULLAGINO);
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}
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typedef void (*aghdr_init_work_f)(struct xfs_mount *mp, struct xfs_buf *bp,
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struct aghdr_init_data *id);
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static int
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xfs_ag_init_hdr(
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struct xfs_mount *mp,
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struct aghdr_init_data *id,
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aghdr_init_work_f work,
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const struct xfs_buf_ops *ops)
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{
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struct xfs_buf *bp;
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bp = xfs_get_aghdr_buf(mp, id->daddr, id->numblks, 0, ops);
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if (!bp)
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return -ENOMEM;
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(*work)(mp, bp, id);
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xfs_buf_delwri_queue(bp, &id->buffer_list);
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xfs_buf_relse(bp);
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return 0;
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}
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struct xfs_aghdr_grow_data {
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xfs_daddr_t daddr;
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size_t numblks;
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const struct xfs_buf_ops *ops;
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aghdr_init_work_f work;
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xfs_btnum_t type;
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bool need_init;
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};
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/*
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* Prepare new AG headers to be written to disk. We use uncached buffers here,
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* as it is assumed these new AG headers are currently beyond the currently
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* valid filesystem address space. Using cached buffers would trip over EOFS
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* corruption detection alogrithms in the buffer cache lookup routines.
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*
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* This is a non-transactional function, but the prepared buffers are added to a
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* delayed write buffer list supplied by the caller so they can submit them to
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* disk and wait on them as required.
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*/
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int
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xfs_ag_init_headers(
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struct xfs_mount *mp,
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struct aghdr_init_data *id)
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{
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struct xfs_aghdr_grow_data aghdr_data[] = {
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{ /* SB */
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.daddr = XFS_AG_DADDR(mp, id->agno, XFS_SB_DADDR),
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.numblks = XFS_FSS_TO_BB(mp, 1),
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.ops = &xfs_sb_buf_ops,
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.work = &xfs_sbblock_init,
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.need_init = true
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},
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{ /* AGF */
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.daddr = XFS_AG_DADDR(mp, id->agno, XFS_AGF_DADDR(mp)),
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.numblks = XFS_FSS_TO_BB(mp, 1),
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.ops = &xfs_agf_buf_ops,
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.work = &xfs_agfblock_init,
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.need_init = true
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},
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{ /* AGFL */
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.daddr = XFS_AG_DADDR(mp, id->agno, XFS_AGFL_DADDR(mp)),
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.numblks = XFS_FSS_TO_BB(mp, 1),
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.ops = &xfs_agfl_buf_ops,
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.work = &xfs_agflblock_init,
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.need_init = true
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},
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{ /* AGI */
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.daddr = XFS_AG_DADDR(mp, id->agno, XFS_AGI_DADDR(mp)),
|
||
|
|
.numblks = XFS_FSS_TO_BB(mp, 1),
|
||
|
|
.ops = &xfs_agi_buf_ops,
|
||
|
|
.work = &xfs_agiblock_init,
|
||
|
|
.need_init = true
|
||
|
|
},
|
||
|
|
{ /* BNO root block */
|
||
|
|
.daddr = XFS_AGB_TO_DADDR(mp, id->agno, XFS_BNO_BLOCK(mp)),
|
||
|
|
.numblks = BTOBB(mp->m_sb.sb_blocksize),
|
||
|
|
.ops = &xfs_allocbt_buf_ops,
|
||
|
|
.work = &xfs_bnoroot_init,
|
||
|
|
.need_init = true
|
||
|
|
},
|
||
|
|
{ /* CNT root block */
|
||
|
|
.daddr = XFS_AGB_TO_DADDR(mp, id->agno, XFS_CNT_BLOCK(mp)),
|
||
|
|
.numblks = BTOBB(mp->m_sb.sb_blocksize),
|
||
|
|
.ops = &xfs_allocbt_buf_ops,
|
||
|
|
.work = &xfs_cntroot_init,
|
||
|
|
.need_init = true
|
||
|
|
},
|
||
|
|
{ /* INO root block */
|
||
|
|
.daddr = XFS_AGB_TO_DADDR(mp, id->agno, XFS_IBT_BLOCK(mp)),
|
||
|
|
.numblks = BTOBB(mp->m_sb.sb_blocksize),
|
||
|
|
.ops = &xfs_inobt_buf_ops,
|
||
|
|
.work = &xfs_btroot_init,
|
||
|
|
.type = XFS_BTNUM_INO,
|
||
|
|
.need_init = true
|
||
|
|
},
|
||
|
|
{ /* FINO root block */
|
||
|
|
.daddr = XFS_AGB_TO_DADDR(mp, id->agno, XFS_FIBT_BLOCK(mp)),
|
||
|
|
.numblks = BTOBB(mp->m_sb.sb_blocksize),
|
||
|
|
.ops = &xfs_inobt_buf_ops,
|
||
|
|
.work = &xfs_btroot_init,
|
||
|
|
.type = XFS_BTNUM_FINO,
|
||
|
|
.need_init = xfs_sb_version_hasfinobt(&mp->m_sb)
|
||
|
|
},
|
||
|
|
{ /* RMAP root block */
|
||
|
|
.daddr = XFS_AGB_TO_DADDR(mp, id->agno, XFS_RMAP_BLOCK(mp)),
|
||
|
|
.numblks = BTOBB(mp->m_sb.sb_blocksize),
|
||
|
|
.ops = &xfs_rmapbt_buf_ops,
|
||
|
|
.work = &xfs_rmaproot_init,
|
||
|
|
.need_init = xfs_sb_version_hasrmapbt(&mp->m_sb)
|
||
|
|
},
|
||
|
|
{ /* REFC root block */
|
||
|
|
.daddr = XFS_AGB_TO_DADDR(mp, id->agno, xfs_refc_block(mp)),
|
||
|
|
.numblks = BTOBB(mp->m_sb.sb_blocksize),
|
||
|
|
.ops = &xfs_refcountbt_buf_ops,
|
||
|
|
.work = &xfs_btroot_init,
|
||
|
|
.type = XFS_BTNUM_REFC,
|
||
|
|
.need_init = xfs_sb_version_hasreflink(&mp->m_sb)
|
||
|
|
},
|
||
|
|
{ /* NULL terminating block */
|
||
|
|
.daddr = XFS_BUF_DADDR_NULL,
|
||
|
|
}
|
||
|
|
};
|
||
|
|
struct xfs_aghdr_grow_data *dp;
|
||
|
|
int error = 0;
|
||
|
|
|
||
|
|
/* Account for AG free space in new AG */
|
||
|
|
id->nfree += id->agsize - mp->m_ag_prealloc_blocks;
|
||
|
|
for (dp = &aghdr_data[0]; dp->daddr != XFS_BUF_DADDR_NULL; dp++) {
|
||
|
|
if (!dp->need_init)
|
||
|
|
continue;
|
||
|
|
|
||
|
|
id->daddr = dp->daddr;
|
||
|
|
id->numblks = dp->numblks;
|
||
|
|
id->type = dp->type;
|
||
|
|
error = xfs_ag_init_hdr(mp, id, dp->work, dp->ops);
|
||
|
|
if (error)
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
return error;
|
||
|
|
}
|