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xfs: precalculate inodes and blocks per inode cluster

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Store the number of inodes and blocks per inode cluster in the mount
data so that we don't have to keep recalculating them.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
This commit is contained in:
Darrick J. Wong 2018-12-12 08:46:25 -08:00
parent 43004b2a8d
commit 83dcdb4469
7 changed files with 34 additions and 43 deletions
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23
fs/xfs/libxfs/xfs_ialloc.c
View file

@ -288,7 +288,7 @@ xfs_ialloc_inode_init(
{
struct xfs_buf *fbuf;
struct xfs_dinode *free;
int nbufs, blks_per_cluster, inodes_per_cluster;
int nbufs;
int version;
int i, j;
xfs_daddr_t d;
@ -299,9 +299,7 @@ xfs_ialloc_inode_init(
* sizes, manipulate the inodes in buffers which are multiples of the
* blocks size.
*/
blks_per_cluster = xfs_icluster_size_fsb(mp);
inodes_per_cluster = XFS_FSB_TO_INO(mp, blks_per_cluster);
nbufs = length / blks_per_cluster;
nbufs = length / mp->m_blocks_per_cluster;
/*
* Figure out what version number to use in the inodes we create. If
@ -344,9 +342,10 @@ xfs_ialloc_inode_init(
/*
* Get the block.
*/
d = XFS_AGB_TO_DADDR(mp, agno, agbno + (j * blks_per_cluster));
d = XFS_AGB_TO_DADDR(mp, agno, agbno +
(j * mp->m_blocks_per_cluster));
fbuf = xfs_trans_get_buf(tp, mp->m_ddev_targp, d,
mp->m_bsize * blks_per_cluster,
mp->m_bsize * mp->m_blocks_per_cluster,
XBF_UNMAPPED);
if (!fbuf)
return -ENOMEM;
@ -354,7 +353,7 @@ xfs_ialloc_inode_init(
/* Initialize the inode buffers and log them appropriately. */
fbuf->b_ops = &xfs_inode_buf_ops;
xfs_buf_zero(fbuf, 0, BBTOB(fbuf->b_length));
for (i = 0; i < inodes_per_cluster; i++) {
for (i = 0; i < mp->m_inodes_per_cluster; i++) {
int ioffset = i << mp->m_sb.sb_inodelog;
uint isize = xfs_dinode_size(version);
@ -2289,7 +2288,6 @@ xfs_imap(
xfs_agblock_t agbno; /* block number of inode in the alloc group */
xfs_agino_t agino; /* inode number within alloc group */
xfs_agnumber_t agno; /* allocation group number */
int blks_per_cluster; /* num blocks per inode cluster */
xfs_agblock_t chunk_agbno; /* first block in inode chunk */
xfs_agblock_t cluster_agbno; /* first block in inode cluster */
int error; /* error code */
@ -2335,8 +2333,6 @@ xfs_imap(
return -EINVAL;
}
blks_per_cluster = xfs_icluster_size_fsb(mp);
/*
* For bulkstat and handle lookups, we have an untrusted inode number
* that we have to verify is valid. We cannot do this just by reading
@ -2356,7 +2352,7 @@ xfs_imap(
* If the inode cluster size is the same as the blocksize or
* smaller we get to the buffer by simple arithmetics.
*/
if (blks_per_cluster == 1) {
if (mp->m_blocks_per_cluster == 1) {
offset = XFS_INO_TO_OFFSET(mp, ino);
ASSERT(offset < mp->m_sb.sb_inopblock);
@ -2385,12 +2381,13 @@ xfs_imap(
out_map:
ASSERT(agbno >= chunk_agbno);
cluster_agbno = chunk_agbno +
((offset_agbno / blks_per_cluster) * blks_per_cluster);
((offset_agbno / mp->m_blocks_per_cluster) *
mp->m_blocks_per_cluster);
offset = ((agbno - cluster_agbno) * mp->m_sb.sb_inopblock) +
XFS_INO_TO_OFFSET(mp, ino);
imap->im_blkno = XFS_AGB_TO_DADDR(mp, agno, cluster_agbno);
imap->im_len = XFS_FSB_TO_BB(mp, blks_per_cluster);
imap->im_len = XFS_FSB_TO_BB(mp, mp->m_blocks_per_cluster);
imap->im_boffset = (unsigned short)(offset << mp->m_sb.sb_inodelog);
/*

14
fs/xfs/scrub/ialloc.c
View file

@ -193,18 +193,16 @@ xchk_iallocbt_check_freemask(
xfs_agino_t chunkino;
xfs_agino_t clusterino;
xfs_agblock_t agbno;
int blks_per_cluster;
uint16_t holemask;
uint16_t ir_holemask;
int error = 0;
/* Make sure the freemask matches the inode records. */
blks_per_cluster = xfs_icluster_size_fsb(mp);
nr_inodes = XFS_FSB_TO_INO(mp, blks_per_cluster);
nr_inodes = mp->m_inodes_per_cluster;
for (agino = irec->ir_startino;
agino < irec->ir_startino + XFS_INODES_PER_CHUNK;
agino += blks_per_cluster * mp->m_sb.sb_inopblock) {
agino += mp->m_inodes_per_cluster) {
fsino = XFS_AGINO_TO_INO(mp, bs->cur->bc_private.a.agno, agino);
chunkino = agino - irec->ir_startino;
agbno = XFS_AGINO_TO_AGBNO(mp, agino);
@ -225,18 +223,18 @@ xchk_iallocbt_check_freemask(
/* If any part of this is a hole, skip it. */
if (ir_holemask) {
xchk_xref_is_not_owned_by(bs->sc, agbno,
blks_per_cluster,
mp->m_blocks_per_cluster,
&XFS_RMAP_OINFO_INODES);
continue;
}
xchk_xref_is_owned_by(bs->sc, agbno, blks_per_cluster,
xchk_xref_is_owned_by(bs->sc, agbno, mp->m_blocks_per_cluster,
&XFS_RMAP_OINFO_INODES);
/* Grab the inode cluster buffer. */
imap.im_blkno = XFS_AGB_TO_DADDR(mp, bs->cur->bc_private.a.agno,
agbno);
imap.im_len = XFS_FSB_TO_BB(mp, blks_per_cluster);
imap.im_len = XFS_FSB_TO_BB(mp, mp->m_blocks_per_cluster);
imap.im_boffset = 0;
error = xfs_imap_to_bp(mp, bs->cur->bc_tp, &imap,
@ -303,7 +301,7 @@ xchk_iallocbt_rec(
/* Make sure this record is aligned to cluster and inoalignmnt size. */
agbno = XFS_AGINO_TO_AGBNO(mp, irec.ir_startino);
if ((agbno & (xfs_ialloc_cluster_alignment(mp) - 1)) ||
(agbno & (xfs_icluster_size_fsb(mp) - 1)))
(agbno & (mp->m_blocks_per_cluster - 1)))
xchk_btree_set_corrupt(bs->sc, bs->cur, 0);
*inode_blocks += XFS_B_TO_FSB(mp,

14
fs/xfs/xfs_inode.c
View file

@ -2184,8 +2184,6 @@ xfs_ifree_cluster(
struct xfs_icluster *xic)
{
xfs_mount_t *mp = free_ip->i_mount;
int blks_per_cluster;
int inodes_per_cluster;
int nbufs;
int i, j;
int ioffset;
@ -2199,11 +2197,9 @@ xfs_ifree_cluster(
inum = xic->first_ino;
pag = xfs_perag_get(mp, XFS_INO_TO_AGNO(mp, inum));
blks_per_cluster = xfs_icluster_size_fsb(mp);
inodes_per_cluster = XFS_FSB_TO_INO(mp, blks_per_cluster);
nbufs = mp->m_ialloc_blks / blks_per_cluster;
nbufs = mp->m_ialloc_blks / mp->m_blocks_per_cluster;
for (j = 0; j < nbufs; j++, inum += inodes_per_cluster) {
for (j = 0; j < nbufs; j++, inum += mp->m_inodes_per_cluster) {
/*
* The allocation bitmap tells us which inodes of the chunk were
* physically allocated. Skip the cluster if an inode falls into
@ -2211,7 +2207,7 @@ xfs_ifree_cluster(
*/
ioffset = inum - xic->first_ino;
if ((xic->alloc & XFS_INOBT_MASK(ioffset)) == 0) {
ASSERT(ioffset % inodes_per_cluster == 0);
ASSERT(ioffset % mp->m_inodes_per_cluster == 0);
continue;
}
@ -2227,7 +2223,7 @@ xfs_ifree_cluster(
* to mark all the active inodes on the buffer stale.
*/
bp = xfs_trans_get_buf(tp, mp->m_ddev_targp, blkno,
mp->m_bsize * blks_per_cluster,
mp->m_bsize * mp->m_blocks_per_cluster,
XBF_UNMAPPED);
if (!bp)
@ -2274,7 +2270,7 @@ xfs_ifree_cluster(
* transaction stale above, which means there is no point in
* even trying to lock them.
*/
for (i = 0; i < inodes_per_cluster; i++) {
for (i = 0; i < mp->m_inodes_per_cluster; i++) {
retry:
rcu_read_lock();
ip = radix_tree_lookup(&pag->pag_ici_root,

14
fs/xfs/xfs_itable.c
View file

@ -167,20 +167,18 @@ xfs_bulkstat_ichunk_ra(
{
xfs_agblock_t agbno;
struct blk_plug plug;
int blks_per_cluster;
int inodes_per_cluster;
int i; /* inode chunk index */
agbno = XFS_AGINO_TO_AGBNO(mp, irec->ir_startino);
blks_per_cluster = xfs_icluster_size_fsb(mp);
inodes_per_cluster = XFS_FSB_TO_INO(mp, blks_per_cluster);
blk_start_plug(&plug);
for (i = 0; i < XFS_INODES_PER_CHUNK;
i += inodes_per_cluster, agbno += blks_per_cluster) {
if (xfs_inobt_maskn(i, inodes_per_cluster) & ~irec->ir_free) {
xfs_btree_reada_bufs(mp, agno, agbno, blks_per_cluster,
&xfs_inode_buf_ops);
i += mp->m_inodes_per_cluster, agbno += mp->m_blocks_per_cluster) {
if (xfs_inobt_maskn(i, mp->m_inodes_per_cluster) &
~irec->ir_free) {
xfs_btree_reada_bufs(mp, agno, agbno,
mp->m_blocks_per_cluster,
&xfs_inode_buf_ops);
}
}
blk_finish_plug(&plug);

8
fs/xfs/xfs_log_recover.c
View file

@ -3850,7 +3850,6 @@ xlog_recover_do_icreate_pass2(
unsigned int count;
unsigned int isize;
xfs_agblock_t length;
int blks_per_cluster;
int bb_per_cluster;
int cancel_count;
int nbufs;
@ -3918,14 +3917,13 @@ xlog_recover_do_icreate_pass2(
* buffers for cancellation so we don't overwrite anything written after
* a cancellation.
*/
blks_per_cluster = xfs_icluster_size_fsb(mp);
bb_per_cluster = XFS_FSB_TO_BB(mp, blks_per_cluster);
nbufs = length / blks_per_cluster;
bb_per_cluster = XFS_FSB_TO_BB(mp, mp->m_blocks_per_cluster);
nbufs = length / mp->m_blocks_per_cluster;
for (i = 0, cancel_count = 0; i < nbufs; i++) {
xfs_daddr_t daddr;
daddr = XFS_AGB_TO_DADDR(mp, agno,
agbno + i * blks_per_cluster);
agbno + i * mp->m_blocks_per_cluster);
if (xlog_check_buffer_cancelled(log, daddr, bb_per_cluster, 0))
cancel_count++;
}

2
fs/xfs/xfs_mount.c
View file

@ -798,6 +798,8 @@ xfs_mountfs(
if (mp->m_sb.sb_inoalignmt >= XFS_B_TO_FSBT(mp, new_size))
mp->m_inode_cluster_size = new_size;
}
mp->m_blocks_per_cluster = xfs_icluster_size_fsb(mp);
mp->m_inodes_per_cluster = XFS_FSB_TO_INO(mp, mp->m_blocks_per_cluster);
/*
* If enabled, sparse inode chunk alignment is expected to match the

2
fs/xfs/xfs_mount.h
View file

@ -101,6 +101,8 @@ typedef struct xfs_mount {
uint8_t m_agno_log; /* log #ag's */
uint8_t m_agino_log; /* #bits for agino in inum */
uint m_inode_cluster_size;/* min inode buf size */
unsigned int m_inodes_per_cluster;
unsigned int m_blocks_per_cluster;
uint m_blockmask; /* sb_blocksize-1 */
uint m_blockwsize; /* sb_blocksize in words */
uint m_blockwmask; /* blockwsize-1 */