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xfs: refactor inode geometry setup routines

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Migrate all of the inode geometry setup code from xfs_mount.c into a
single libxfs function that we can share with xfsprogs.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
This commit is contained in:
Darrick J. Wong
2019-06-05 11:19:35 -07:00
parent ef32595999
commit 494dba7b27
4 changed files with 101 additions and 144 deletions
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124
fs/xfs/libxfs/xfs_ialloc.c
View File

@@ -31,20 +31,6 @@
#include "xfs_log.h"
#include "xfs_rmap.h"
/*
* Allocation group level functions.
*/
int
xfs_ialloc_cluster_alignment(
struct xfs_mount *mp)
{
if (xfs_sb_version_hasalign(&mp->m_sb) &&
mp->m_sb.sb_inoalignmt >= xfs_icluster_size_fsb(mp))
return mp->m_sb.sb_inoalignmt;
return 1;
}
/*
* Lookup a record by ino in the btree given by cur.
*/
@@ -2413,20 +2399,6 @@ out_map:
return 0;
}
/*
* Compute and fill in value of m_ino_geo.inobt_maxlevels.
*/
void
xfs_ialloc_compute_maxlevels(
xfs_mount_t *mp) /* file system mount structure */
{
uint inodes;
inodes = (1LL << XFS_INO_AGINO_BITS(mp)) >> XFS_INODES_PER_CHUNK_LOG;
M_IGEO(mp)->inobt_maxlevels = xfs_btree_compute_maxlevels(
M_IGEO(mp)->inobt_mnr, inodes);
}
/*
* Log specified fields for the ag hdr (inode section). The growth of the agi
* structure over time requires that we interpret the buffer as two logical
@@ -2773,3 +2745,99 @@ xfs_ialloc_count_inodes(
*freecount = ci.freecount;
return 0;
}
/*
* Initialize inode-related geometry information.
*
* Compute the inode btree min and max levels and set maxicount.
*
* Set the inode cluster size. This may still be overridden by the file
* system block size if it is larger than the chosen cluster size.
*
* For v5 filesystems, scale the cluster size with the inode size to keep a
* constant ratio of inode per cluster buffer, but only if mkfs has set the
* inode alignment value appropriately for larger cluster sizes.
*
* Then compute the inode cluster alignment information.
*/
void
xfs_ialloc_setup_geometry(
struct xfs_mount *mp)
{
struct xfs_sb *sbp = &mp->m_sb;
struct xfs_ino_geometry *igeo = M_IGEO(mp);
uint64_t icount;
uint inodes;
/* Compute inode btree geometry. */
igeo->agino_log = sbp->sb_inopblog + sbp->sb_agblklog;
igeo->inobt_mxr[0] = xfs_inobt_maxrecs(mp, sbp->sb_blocksize, 1);
igeo->inobt_mxr[1] = xfs_inobt_maxrecs(mp, sbp->sb_blocksize, 0);
igeo->inobt_mnr[0] = igeo->inobt_mxr[0] / 2;
igeo->inobt_mnr[1] = igeo->inobt_mxr[1] / 2;
igeo->ialloc_inos = max_t(uint16_t, XFS_INODES_PER_CHUNK,
sbp->sb_inopblock);
igeo->ialloc_blks = igeo->ialloc_inos >> sbp->sb_inopblog;
if (sbp->sb_spino_align)
igeo->ialloc_min_blks = sbp->sb_spino_align;
else
igeo->ialloc_min_blks = igeo->ialloc_blks;
/* Compute and fill in value of m_ino_geo.inobt_maxlevels. */
inodes = (1LL << XFS_INO_AGINO_BITS(mp)) >> XFS_INODES_PER_CHUNK_LOG;
igeo->inobt_maxlevels = xfs_btree_compute_maxlevels(igeo->inobt_mnr,
inodes);
/* Set the maximum inode count for this filesystem. */
if (sbp->sb_imax_pct) {
/*
* Make sure the maximum inode count is a multiple
* of the units we allocate inodes in.
*/
icount = sbp->sb_dblocks * sbp->sb_imax_pct;
do_div(icount, 100);
do_div(icount, igeo->ialloc_blks);
igeo->maxicount = XFS_FSB_TO_INO(mp,
icount * igeo->ialloc_blks);
} else {
igeo->maxicount = 0;
}
igeo->inode_cluster_size = XFS_INODE_BIG_CLUSTER_SIZE;
if (xfs_sb_version_hascrc(&mp->m_sb)) {
int new_size = igeo->inode_cluster_size;
new_size *= mp->m_sb.sb_inodesize / XFS_DINODE_MIN_SIZE;
if (mp->m_sb.sb_inoalignmt >= XFS_B_TO_FSBT(mp, new_size))
igeo->inode_cluster_size = new_size;
}
/* Calculate inode cluster ratios. */
if (igeo->inode_cluster_size > mp->m_sb.sb_blocksize)
igeo->blocks_per_cluster = XFS_B_TO_FSBT(mp,
igeo->inode_cluster_size);
else
igeo->blocks_per_cluster = 1;
igeo->inodes_per_cluster = XFS_FSB_TO_INO(mp, igeo->blocks_per_cluster);
/* Calculate inode cluster alignment. */
if (xfs_sb_version_hasalign(&mp->m_sb) &&
mp->m_sb.sb_inoalignmt >= igeo->blocks_per_cluster)
igeo->cluster_align = mp->m_sb.sb_inoalignmt;
else
igeo->cluster_align = 1;
igeo->inoalign_mask = igeo->cluster_align - 1;
igeo->cluster_align_inodes = XFS_FSB_TO_INO(mp, igeo->cluster_align);
/*
* If we are using stripe alignment, check whether
* the stripe unit is a multiple of the inode alignment
*/
if (mp->m_dalign && igeo->inoalign_mask &&
!(mp->m_dalign & igeo->inoalign_mask))
igeo->ialloc_align = mp->m_dalign;
else
igeo->ialloc_align = 0;
}