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596 lines
16 KiB
596 lines
16 KiB
/* 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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|
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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_bit.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_ialloc.h" |
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#include "xfs_rmap.h" |
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#include "xfs_ag.h" |
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#include "xfs_ag_resv.h" |
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#include "xfs_health.h" |
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static int |
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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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struct xfs_buf **bpp, |
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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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int error; |
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error = xfs_buf_get_uncached(mp->m_ddev_targp, numblks, 0, &bp); |
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if (error) |
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return error; |
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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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*bpp = bp; |
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return 0; |
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} |
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static inline bool is_log_ag(struct xfs_mount *mp, struct aghdr_init_data *id) |
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{ |
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return mp->m_sb.sb_logstart > 0 && |
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id->agno == XFS_FSB_TO_AGNO(mp, mp->m_sb.sb_logstart); |
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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); |
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} |
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/* Finish initializing a free space btree. */ |
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static void |
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xfs_freesp_init_recs( |
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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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struct xfs_btree_block *block = XFS_BUF_TO_BLOCK(bp); |
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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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if (is_log_ag(mp, id)) { |
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struct xfs_alloc_rec *nrec; |
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xfs_agblock_t start = XFS_FSB_TO_AGBNO(mp, |
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mp->m_sb.sb_logstart); |
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ASSERT(start >= mp->m_ag_prealloc_blocks); |
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if (start != mp->m_ag_prealloc_blocks) { |
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/* |
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* Modify first record to pad stripe align of log |
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*/ |
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arec->ar_blockcount = cpu_to_be32(start - |
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mp->m_ag_prealloc_blocks); |
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nrec = arec + 1; |
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/* |
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* Insert second record at start of internal log |
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* which then gets trimmed. |
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*/ |
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nrec->ar_startblock = cpu_to_be32( |
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be32_to_cpu(arec->ar_startblock) + |
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be32_to_cpu(arec->ar_blockcount)); |
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arec = nrec; |
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be16_add_cpu(&block->bb_numrecs, 1); |
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} |
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/* |
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* Change record start to after the internal log |
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*/ |
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be32_add_cpu(&arec->ar_startblock, mp->m_sb.sb_logblocks); |
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} |
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/* |
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* Calculate the record block count and check for the case where |
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* the log might have consumed all available space in the AG. If |
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* so, reset the record count to 0 to avoid exposure of an invalid |
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* record start block. |
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*/ |
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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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if (!arec->ar_blockcount) |
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block->bb_numrecs = 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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xfs_btree_init_block(mp, bp, XFS_BTNUM_BNO, 0, 1, id->agno); |
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xfs_freesp_init_recs(mp, bp, id); |
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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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xfs_btree_init_block(mp, bp, XFS_BTNUM_CNT, 0, 1, id->agno); |
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xfs_freesp_init_recs(mp, bp, id); |
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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); |
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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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/* account for the log space */ |
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if (is_log_ag(mp, id)) { |
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rrec = XFS_RMAP_REC_ADDR(block, |
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be16_to_cpu(block->bb_numrecs) + 1); |
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rrec->rm_startblock = cpu_to_be32( |
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XFS_FSB_TO_AGBNO(mp, mp->m_sb.sb_logstart)); |
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rrec->rm_blockcount = cpu_to_be32(mp->m_sb.sb_logblocks); |
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rrec->rm_owner = cpu_to_be64(XFS_RMAP_OWN_LOG); |
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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 = bp->b_addr; |
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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 = bp->b_addr; |
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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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if (is_log_ag(mp, id)) { |
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int64_t logblocks = mp->m_sb.sb_logblocks; |
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be32_add_cpu(&agf->agf_freeblks, -logblocks); |
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agf->agf_longest = cpu_to_be32(id->agsize - |
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XFS_FSB_TO_AGBNO(mp, mp->m_sb.sb_logstart) - logblocks); |
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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(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 = bp->b_addr; |
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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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if (xfs_sb_version_hasinobtcounts(&mp->m_sb)) { |
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agi->agi_iblocks = cpu_to_be32(1); |
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if (xfs_sb_version_hasfinobt(&mp->m_sb)) |
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agi->agi_fblocks = cpu_to_be32(1); |
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} |
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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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int error; |
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error = xfs_get_aghdr_buf(mp, id->daddr, id->numblks, &bp, ops); |
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if (error) |
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return error; |
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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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{ |
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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)), |
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.numblks = XFS_FSS_TO_BB(mp, 1), |
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.ops = &xfs_agi_buf_ops, |
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.work = &xfs_agiblock_init, |
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.need_init = true |
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}, |
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{ /* BNO root block */ |
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.daddr = XFS_AGB_TO_DADDR(mp, id->agno, XFS_BNO_BLOCK(mp)), |
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.numblks = BTOBB(mp->m_sb.sb_blocksize), |
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.ops = &xfs_bnobt_buf_ops, |
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.work = &xfs_bnoroot_init, |
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.need_init = true |
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}, |
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{ /* CNT root block */ |
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.daddr = XFS_AGB_TO_DADDR(mp, id->agno, XFS_CNT_BLOCK(mp)), |
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.numblks = BTOBB(mp->m_sb.sb_blocksize), |
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.ops = &xfs_cntbt_buf_ops, |
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.work = &xfs_cntroot_init, |
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.need_init = true |
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}, |
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{ /* INO root block */ |
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.daddr = XFS_AGB_TO_DADDR(mp, id->agno, XFS_IBT_BLOCK(mp)), |
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.numblks = BTOBB(mp->m_sb.sb_blocksize), |
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.ops = &xfs_inobt_buf_ops, |
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.work = &xfs_btroot_init, |
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.type = XFS_BTNUM_INO, |
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.need_init = true |
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}, |
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{ /* FINO root block */ |
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.daddr = XFS_AGB_TO_DADDR(mp, id->agno, XFS_FIBT_BLOCK(mp)), |
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.numblks = BTOBB(mp->m_sb.sb_blocksize), |
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.ops = &xfs_finobt_buf_ops, |
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.work = &xfs_btroot_init, |
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.type = XFS_BTNUM_FINO, |
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.need_init = xfs_sb_version_hasfinobt(&mp->m_sb) |
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}, |
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{ /* RMAP root block */ |
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.daddr = XFS_AGB_TO_DADDR(mp, id->agno, XFS_RMAP_BLOCK(mp)), |
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.numblks = BTOBB(mp->m_sb.sb_blocksize), |
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.ops = &xfs_rmapbt_buf_ops, |
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.work = &xfs_rmaproot_init, |
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.need_init = xfs_sb_version_hasrmapbt(&mp->m_sb) |
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}, |
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{ /* REFC root block */ |
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.daddr = XFS_AGB_TO_DADDR(mp, id->agno, xfs_refc_block(mp)), |
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.numblks = BTOBB(mp->m_sb.sb_blocksize), |
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.ops = &xfs_refcountbt_buf_ops, |
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.work = &xfs_btroot_init, |
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.type = XFS_BTNUM_REFC, |
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.need_init = xfs_sb_version_hasreflink(&mp->m_sb) |
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}, |
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{ /* NULL terminating block */ |
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.daddr = XFS_BUF_DADDR_NULL, |
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} |
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}; |
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struct xfs_aghdr_grow_data *dp; |
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int error = 0; |
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|
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/* Account for AG free space in new AG */ |
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id->nfree += id->agsize - mp->m_ag_prealloc_blocks; |
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for (dp = &aghdr_data[0]; dp->daddr != XFS_BUF_DADDR_NULL; dp++) { |
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if (!dp->need_init) |
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continue; |
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|
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id->daddr = dp->daddr; |
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id->numblks = dp->numblks; |
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id->type = dp->type; |
|
error = xfs_ag_init_hdr(mp, id, dp->work, dp->ops); |
|
if (error) |
|
break; |
|
} |
|
return error; |
|
} |
|
|
|
/* |
|
* Extent the AG indicated by the @id by the length passed in |
|
*/ |
|
int |
|
xfs_ag_extend_space( |
|
struct xfs_mount *mp, |
|
struct xfs_trans *tp, |
|
struct aghdr_init_data *id, |
|
xfs_extlen_t len) |
|
{ |
|
struct xfs_buf *bp; |
|
struct xfs_agi *agi; |
|
struct xfs_agf *agf; |
|
int error; |
|
|
|
/* |
|
* Change the agi length. |
|
*/ |
|
error = xfs_ialloc_read_agi(mp, tp, id->agno, &bp); |
|
if (error) |
|
return error; |
|
|
|
agi = bp->b_addr; |
|
be32_add_cpu(&agi->agi_length, len); |
|
ASSERT(id->agno == mp->m_sb.sb_agcount - 1 || |
|
be32_to_cpu(agi->agi_length) == mp->m_sb.sb_agblocks); |
|
xfs_ialloc_log_agi(tp, bp, XFS_AGI_LENGTH); |
|
|
|
/* |
|
* Change agf length. |
|
*/ |
|
error = xfs_alloc_read_agf(mp, tp, id->agno, 0, &bp); |
|
if (error) |
|
return error; |
|
|
|
agf = bp->b_addr; |
|
be32_add_cpu(&agf->agf_length, len); |
|
ASSERT(agf->agf_length == agi->agi_length); |
|
xfs_alloc_log_agf(tp, bp, XFS_AGF_LENGTH); |
|
|
|
/* |
|
* Free the new space. |
|
* |
|
* XFS_RMAP_OINFO_SKIP_UPDATE is used here to tell the rmap btree that |
|
* this doesn't actually exist in the rmap btree. |
|
*/ |
|
error = xfs_rmap_free(tp, bp, id->agno, |
|
be32_to_cpu(agf->agf_length) - len, |
|
len, &XFS_RMAP_OINFO_SKIP_UPDATE); |
|
if (error) |
|
return error; |
|
|
|
return xfs_free_extent(tp, XFS_AGB_TO_FSB(mp, id->agno, |
|
be32_to_cpu(agf->agf_length) - len), |
|
len, &XFS_RMAP_OINFO_SKIP_UPDATE, |
|
XFS_AG_RESV_NONE); |
|
} |
|
|
|
/* Retrieve AG geometry. */ |
|
int |
|
xfs_ag_get_geometry( |
|
struct xfs_mount *mp, |
|
xfs_agnumber_t agno, |
|
struct xfs_ag_geometry *ageo) |
|
{ |
|
struct xfs_buf *agi_bp; |
|
struct xfs_buf *agf_bp; |
|
struct xfs_agi *agi; |
|
struct xfs_agf *agf; |
|
struct xfs_perag *pag; |
|
unsigned int freeblks; |
|
int error; |
|
|
|
if (agno >= mp->m_sb.sb_agcount) |
|
return -EINVAL; |
|
|
|
/* Lock the AG headers. */ |
|
error = xfs_ialloc_read_agi(mp, NULL, agno, &agi_bp); |
|
if (error) |
|
return error; |
|
error = xfs_alloc_read_agf(mp, NULL, agno, 0, &agf_bp); |
|
if (error) |
|
goto out_agi; |
|
|
|
pag = agi_bp->b_pag; |
|
|
|
/* Fill out form. */ |
|
memset(ageo, 0, sizeof(*ageo)); |
|
ageo->ag_number = agno; |
|
|
|
agi = agi_bp->b_addr; |
|
ageo->ag_icount = be32_to_cpu(agi->agi_count); |
|
ageo->ag_ifree = be32_to_cpu(agi->agi_freecount); |
|
|
|
agf = agf_bp->b_addr; |
|
ageo->ag_length = be32_to_cpu(agf->agf_length); |
|
freeblks = pag->pagf_freeblks + |
|
pag->pagf_flcount + |
|
pag->pagf_btreeblks - |
|
xfs_ag_resv_needed(pag, XFS_AG_RESV_NONE); |
|
ageo->ag_freeblks = freeblks; |
|
xfs_ag_geom_health(pag, ageo); |
|
|
|
/* Release resources. */ |
|
xfs_buf_relse(agf_bp); |
|
out_agi: |
|
xfs_buf_relse(agi_bp); |
|
return error; |
|
}
|
|
|