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xfs: add rmap btree growfs support 

Originally-From: Dave Chinner <dchinner@redhat.com>

Now we can read and write rmap btree blocks, we can add support to
the growfs code to initialise new rmap btree blocks.

[darrick.wong@oracle.com: fill out the rmap offset fields]

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
This commit is contained in:
Darrick J. Wong 2016-08-03 11:36:08 +10:00 committed by Dave Chinner
parent 035e00acb5
commit e70d829f8d
1 changed files with 73 additions and 0 deletions
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73
fs/xfs/xfs_fsops.c
View File

@ -33,6 +33,7 @@
#include "xfs_btree.h"
#include "xfs_alloc_btree.h"
#include "xfs_alloc.h"
#include "xfs_rmap_btree.h"
#include "xfs_ialloc.h"
#include "xfs_fsops.h"
#include "xfs_itable.h"
@ -241,6 +242,12 @@ xfs_growfs_data_private(
agf->agf_roots[XFS_BTNUM_CNTi] = cpu_to_be32(XFS_CNT_BLOCK(mp));
agf->agf_levels[XFS_BTNUM_BNOi] = cpu_to_be32(1);
agf->agf_levels[XFS_BTNUM_CNTi] = cpu_to_be32(1);
if (xfs_sb_version_hasrmapbt(&mp->m_sb)) {
agf->agf_roots[XFS_BTNUM_RMAPi] =
cpu_to_be32(XFS_RMAP_BLOCK(mp));
agf->agf_levels[XFS_BTNUM_RMAPi] = cpu_to_be32(1);
}
agf->agf_flfirst = cpu_to_be32(1);
agf->agf_fllast = 0;
agf->agf_flcount = 0;
@ -380,6 +387,72 @@ xfs_growfs_data_private(
if (error)
goto error0;
/* RMAP btree root block */
if (xfs_sb_version_hasrmapbt(&mp->m_sb)) {
struct xfs_rmap_rec *rrec;
struct xfs_btree_block *block;
bp = xfs_growfs_get_hdr_buf(mp,
XFS_AGB_TO_DADDR(mp, agno, XFS_RMAP_BLOCK(mp)),
BTOBB(mp->m_sb.sb_blocksize), 0,
&xfs_rmapbt_buf_ops);
if (!bp) {
error = -ENOMEM;
goto error0;
}
xfs_btree_init_block(mp, bp, XFS_RMAP_CRC_MAGIC, 0, 0,
agno, XFS_BTREE_CRC_BLOCKS);
block = XFS_BUF_TO_BLOCK(bp);
/*
* mark the AG header regions as static metadata The BNO
* btree block is the first block after the headers, so
* it's location defines the size of region the static
* metadata consumes.
*
* Note: unlike mkfs, we never have to account for log
* space when growing the data regions
*/
rrec = XFS_RMAP_REC_ADDR(block, 1);
rrec->rm_startblock = 0;
rrec->rm_blockcount = cpu_to_be32(XFS_BNO_BLOCK(mp));
rrec->rm_owner = cpu_to_be64(XFS_RMAP_OWN_FS);
rrec->rm_offset = 0;
be16_add_cpu(&block->bb_numrecs, 1);
/* account freespace btree root blocks */
rrec = XFS_RMAP_REC_ADDR(block, 2);
rrec->rm_startblock = cpu_to_be32(XFS_BNO_BLOCK(mp));
rrec->rm_blockcount = cpu_to_be32(2);
rrec->rm_owner = cpu_to_be64(XFS_RMAP_OWN_AG);
rrec->rm_offset = 0;
be16_add_cpu(&block->bb_numrecs, 1);
/* account inode btree root blocks */
rrec = XFS_RMAP_REC_ADDR(block, 3);
rrec->rm_startblock = cpu_to_be32(XFS_IBT_BLOCK(mp));
rrec->rm_blockcount = cpu_to_be32(XFS_RMAP_BLOCK(mp) -
XFS_IBT_BLOCK(mp));
rrec->rm_owner = cpu_to_be64(XFS_RMAP_OWN_INOBT);
rrec->rm_offset = 0;
be16_add_cpu(&block->bb_numrecs, 1);
/* account for rmap btree root */
rrec = XFS_RMAP_REC_ADDR(block, 4);
rrec->rm_startblock = cpu_to_be32(XFS_RMAP_BLOCK(mp));
rrec->rm_blockcount = cpu_to_be32(1);
rrec->rm_owner = cpu_to_be64(XFS_RMAP_OWN_AG);
rrec->rm_offset = 0;
be16_add_cpu(&block->bb_numrecs, 1);
error = xfs_bwrite(bp);
xfs_buf_relse(bp);
if (error)
goto error0;
}
/*
* INO btree root block
*/