@@ -1071,7 +1071,7 @@ static inline void xfs_dinode_put_rdev(struct xfs_dinode *dip, xfs_dev_t rdev)
#define XFS_INO_MASK(k) (uint32_t)((1ULL << (k)) - 1)
#define XFS_INO_OFFSET_BITS(mp) (mp)->m_sb.sb_inopblog
#define XFS_INO_AGBNO_BITS(mp) (mp)->m_sb.sb_agblklog
-#define XFS_INO_AGINO_BITS(mp) (mp)->m_agino_log
+#define XFS_INO_AGINO_BITS(mp) ((mp)->m_ino_geo.agino_log)
#define XFS_INO_AGNO_BITS(mp) (mp)->m_agno_log
#define XFS_INO_BITS(mp) \
XFS_INO_AGNO_BITS(mp) + XFS_INO_AGINO_BITS(mp)
@@ -1694,4 +1694,40 @@ struct xfs_acl {
#define SGI_ACL_FILE_SIZE (sizeof(SGI_ACL_FILE)-1)
#define SGI_ACL_DEFAULT_SIZE (sizeof(SGI_ACL_DEFAULT)-1)
+struct xfs_ino_geometry {
+ /* Maximum inode count in this filesystem. */
+ uint64_t maxicount;
+
+ /*
+ * Desired inode cluster buffer size, in bytes. This value is not
+ * rounded up to at least one filesystem block.
+ */
+ unsigned int inode_cluster_size;
+
+ /* Inode cluster sizes, adjusted to be at least 1 fsb. */
+ unsigned int inodes_per_cluster;
+ unsigned int blocks_per_cluster;
+
+ /* Inode cluster alignment. */
+ unsigned int cluster_align;
+ unsigned int cluster_align_inodes;
+ unsigned int inoalign_mask; /* mask sb_inoalignmt if used */
+
+ unsigned int inobt_mxr[2]; /* max inobt btree records */
+ unsigned int inobt_mnr[2]; /* min inobt btree records */
+ unsigned int inobt_maxlevels; /* max inobt btree levels. */
+
+ /* Size of inode allocations under normal operation. */
+ unsigned int ialloc_inos;
+ unsigned int ialloc_blks;
+
+ /* Minimum inode blocks for a sparse allocation. */
+ unsigned int ialloc_min_blks;
+
+ /* stripe unit inode alignment */
+ unsigned int ialloc_align;
+
+ unsigned int agino_log; /* #bits for agino in inum */
+};
+
#endif /* __XFS_FORMAT_H__ */
@@ -299,7 +299,7 @@ xfs_ialloc_inode_init(
* sizes, manipulate the inodes in buffers which are multiples of the
* blocks size.
*/
- nbufs = length / mp->m_blocks_per_cluster;
+ nbufs = length / M_IGEO(mp)->blocks_per_cluster;
/*
* Figure out what version number to use in the inodes we create. If
@@ -343,9 +343,10 @@ xfs_ialloc_inode_init(
* Get the block.
*/
d = XFS_AGB_TO_DADDR(mp, agno, agbno +
- (j * mp->m_blocks_per_cluster));
+ (j * M_IGEO(mp)->blocks_per_cluster));
fbuf = xfs_trans_get_buf(tp, mp->m_ddev_targp, d,
- mp->m_bsize * mp->m_blocks_per_cluster,
+ mp->m_bsize *
+ M_IGEO(mp)->blocks_per_cluster,
XBF_UNMAPPED);
if (!fbuf)
return -ENOMEM;
@@ -353,7 +354,7 @@ 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 < mp->m_inodes_per_cluster; i++) {
+ for (i = 0; i < M_IGEO(mp)->inodes_per_cluster; i++) {
int ioffset = i << mp->m_sb.sb_inodelog;
uint isize = xfs_dinode_size(version);
@@ -616,24 +617,26 @@ xfs_inobt_insert_sprec(
* Allocate new inodes in the allocation group specified by agbp.
* Return 0 for success, else error code.
*/
-STATIC int /* error code or 0 */
+STATIC int
xfs_ialloc_ag_alloc(
- xfs_trans_t *tp, /* transaction pointer */
- xfs_buf_t *agbp, /* alloc group buffer */
- int *alloc)
+ struct xfs_trans *tp,
+ struct xfs_buf *agbp,
+ int *alloc)
{
- xfs_agi_t *agi; /* allocation group header */
- xfs_alloc_arg_t args; /* allocation argument structure */
- xfs_agnumber_t agno;
- int error;
- xfs_agino_t newino; /* new first inode's number */
- xfs_agino_t newlen; /* new number of inodes */
- int isaligned = 0; /* inode allocation at stripe unit */
- /* boundary */
- uint16_t allocmask = (uint16_t) -1; /* init. to full chunk */
+ struct xfs_agi *agi;
+ struct xfs_alloc_arg args;
+ xfs_agnumber_t agno;
+ int error;
+ xfs_agino_t newino; /* new first inode's number */
+ xfs_agino_t newlen; /* new number of inodes */
+ int isaligned = 0; /* inode allocation at stripe */
+ /* unit boundary */
+ /* init. to full chunk */
+ uint16_t allocmask = (uint16_t) -1;
struct xfs_inobt_rec_incore rec;
- struct xfs_perag *pag;
- int do_sparse = 0;
+ struct xfs_perag *pag;
+ struct xfs_ino_geometry *igeo = M_IGEO(tp->t_mountp);
+ int do_sparse = 0;
memset(&args, 0, sizeof(args));
args.tp = tp;
@@ -644,7 +647,7 @@ xfs_ialloc_ag_alloc(
#ifdef DEBUG
/* randomly do sparse inode allocations */
if (xfs_sb_version_hassparseinodes(&tp->t_mountp->m_sb) &&
- args.mp->m_ialloc_min_blks < args.mp->m_ialloc_blks)
+ igeo->ialloc_min_blks < igeo->ialloc_blks)
do_sparse = prandom_u32() & 1;
#endif
@@ -652,12 +655,12 @@ xfs_ialloc_ag_alloc(
* Locking will ensure that we don't have two callers in here
* at one time.
*/
- newlen = args.mp->m_ialloc_inos;
- if (args.mp->m_maxicount &&
+ newlen = igeo->ialloc_inos;
+ if (igeo->maxicount &&
percpu_counter_read_positive(&args.mp->m_icount) + newlen >
- args.mp->m_maxicount)
+ igeo->maxicount)
return -ENOSPC;
- args.minlen = args.maxlen = args.mp->m_ialloc_blks;
+ args.minlen = args.maxlen = igeo->ialloc_blks;
/*
* First try to allocate inodes contiguous with the last-allocated
* chunk of inodes. If the filesystem is striped, this will fill
@@ -667,7 +670,7 @@ xfs_ialloc_ag_alloc(
newino = be32_to_cpu(agi->agi_newino);
agno = be32_to_cpu(agi->agi_seqno);
args.agbno = XFS_AGINO_TO_AGBNO(args.mp, newino) +
- args.mp->m_ialloc_blks;
+ igeo->ialloc_blks;
if (do_sparse)
goto sparse_alloc;
if (likely(newino != NULLAGINO &&
@@ -690,10 +693,10 @@ xfs_ialloc_ag_alloc(
* but not to use them in the actual exact allocation.
*/
args.alignment = 1;
- args.minalignslop = args.mp->m_cluster_align - 1;
+ args.minalignslop = igeo->cluster_align - 1;
/* Allow space for the inode btree to split. */
- args.minleft = args.mp->m_in_maxlevels - 1;
+ args.minleft = igeo->inobt_maxlevels - 1;
if ((error = xfs_alloc_vextent(&args)))
return error;
@@ -720,12 +723,12 @@ xfs_ialloc_ag_alloc(
* pieces, so don't need alignment anyway.
*/
isaligned = 0;
- if (args.mp->m_sinoalign) {
+ if (igeo->ialloc_align) {
ASSERT(!(args.mp->m_flags & XFS_MOUNT_NOALIGN));
args.alignment = args.mp->m_dalign;
isaligned = 1;
} else
- args.alignment = args.mp->m_cluster_align;
+ args.alignment = igeo->cluster_align;
/*
* Need to figure out where to allocate the inode blocks.
* Ideally they should be spaced out through the a.g.
@@ -741,7 +744,7 @@ xfs_ialloc_ag_alloc(
/*
* Allow space for the inode btree to split.
*/
- args.minleft = args.mp->m_in_maxlevels - 1;
+ args.minleft = igeo->inobt_maxlevels - 1;
if ((error = xfs_alloc_vextent(&args)))
return error;
}
@@ -754,7 +757,7 @@ xfs_ialloc_ag_alloc(
args.type = XFS_ALLOCTYPE_NEAR_BNO;
args.agbno = be32_to_cpu(agi->agi_root);
args.fsbno = XFS_AGB_TO_FSB(args.mp, agno, args.agbno);
- args.alignment = args.mp->m_cluster_align;
+ args.alignment = igeo->cluster_align;
if ((error = xfs_alloc_vextent(&args)))
return error;
}
@@ -764,7 +767,7 @@ xfs_ialloc_ag_alloc(
* the sparse allocation length is smaller than a full chunk.
*/
if (xfs_sb_version_hassparseinodes(&args.mp->m_sb) &&
- args.mp->m_ialloc_min_blks < args.mp->m_ialloc_blks &&
+ igeo->ialloc_min_blks < igeo->ialloc_blks &&
args.fsbno == NULLFSBLOCK) {
sparse_alloc:
args.type = XFS_ALLOCTYPE_NEAR_BNO;
@@ -773,7 +776,7 @@ xfs_ialloc_ag_alloc(
args.alignment = args.mp->m_sb.sb_spino_align;
args.prod = 1;
- args.minlen = args.mp->m_ialloc_min_blks;
+ args.minlen = igeo->ialloc_min_blks;
args.maxlen = args.minlen;
/*
@@ -789,7 +792,7 @@ xfs_ialloc_ag_alloc(
args.min_agbno = args.mp->m_sb.sb_inoalignmt;
args.max_agbno = round_down(args.mp->m_sb.sb_agblocks,
args.mp->m_sb.sb_inoalignmt) -
- args.mp->m_ialloc_blks;
+ igeo->ialloc_blks;
error = xfs_alloc_vextent(&args);
if (error)
@@ -1006,7 +1009,7 @@ xfs_ialloc_ag_select(
* space needed for alignment of inode chunks when checking the
* longest contiguous free space in the AG - this prevents us
* from getting ENOSPC because we have free space larger than
- * m_ialloc_blks but alignment constraints prevent us from using
+ * ialloc_blks but alignment constraints prevent us from using
* it.
*
* If we can't find an AG with space for full alignment slack to
@@ -1015,9 +1018,9 @@ xfs_ialloc_ag_select(
* if we fail allocation due to alignment issues then it is most
* likely a real ENOSPC condition.
*/
- ineed = mp->m_ialloc_min_blks;
+ ineed = M_IGEO(mp)->ialloc_min_blks;
if (flags && ineed > 1)
- ineed += mp->m_cluster_align;
+ ineed += M_IGEO(mp)->cluster_align;
longest = pag->pagf_longest;
if (!longest)
longest = pag->pagf_flcount > 0;
@@ -1703,6 +1706,7 @@ xfs_dialloc(
int noroom = 0;
xfs_agnumber_t start_agno;
struct xfs_perag *pag;
+ struct xfs_ino_geometry *igeo = M_IGEO(mp);
int okalloc = 1;
if (*IO_agbp) {
@@ -1733,9 +1737,9 @@ xfs_dialloc(
* Read rough value of mp->m_icount by percpu_counter_read_positive,
* which will sacrifice the preciseness but improve the performance.
*/
- if (mp->m_maxicount &&
- percpu_counter_read_positive(&mp->m_icount) + mp->m_ialloc_inos
- > mp->m_maxicount) {
+ if (igeo->maxicount &&
+ percpu_counter_read_positive(&mp->m_icount) + igeo->ialloc_inos
+ > igeo->maxicount) {
noroom = 1;
okalloc = 0;
}
@@ -1852,7 +1856,8 @@ xfs_difree_inode_chunk(
if (!xfs_inobt_issparse(rec->ir_holemask)) {
/* not sparse, calculate extent info directly */
xfs_bmap_add_free(tp, XFS_AGB_TO_FSB(mp, agno, sagbno),
- mp->m_ialloc_blks, &XFS_RMAP_OINFO_INODES);
+ M_IGEO(mp)->ialloc_blks,
+ &XFS_RMAP_OINFO_INODES);
return;
}
@@ -2261,7 +2266,7 @@ xfs_imap_lookup(
/* check that the returned record contains the required inode */
if (rec.ir_startino > agino ||
- rec.ir_startino + mp->m_ialloc_inos <= agino)
+ rec.ir_startino + M_IGEO(mp)->ialloc_inos <= agino)
return -EINVAL;
/* for untrusted inodes check it is allocated first */
@@ -2352,7 +2357,7 @@ xfs_imap(
* If the inode cluster size is the same as the blocksize or
* smaller we get to the buffer by simple arithmetics.
*/
- if (mp->m_blocks_per_cluster == 1) {
+ if (M_IGEO(mp)->blocks_per_cluster == 1) {
offset = XFS_INO_TO_OFFSET(mp, ino);
ASSERT(offset < mp->m_sb.sb_inopblock);
@@ -2368,8 +2373,8 @@ xfs_imap(
* find the location. Otherwise we have to do a btree
* lookup to find the location.
*/
- if (mp->m_inoalign_mask) {
- offset_agbno = agbno & mp->m_inoalign_mask;
+ if (M_IGEO(mp)->inoalign_mask) {
+ offset_agbno = agbno & M_IGEO(mp)->inoalign_mask;
chunk_agbno = agbno - offset_agbno;
} else {
error = xfs_imap_lookup(mp, tp, agno, agino, agbno,
@@ -2381,13 +2386,13 @@ xfs_imap(
out_map:
ASSERT(agbno >= chunk_agbno);
cluster_agbno = chunk_agbno +
- ((offset_agbno / mp->m_blocks_per_cluster) *
- mp->m_blocks_per_cluster);
+ ((offset_agbno / M_IGEO(mp)->blocks_per_cluster) *
+ M_IGEO(mp)->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, mp->m_blocks_per_cluster);
+ imap->im_len = XFS_FSB_TO_BB(mp, M_IGEO(mp)->blocks_per_cluster);
imap->im_boffset = (unsigned short)(offset << mp->m_sb.sb_inodelog);
/*
@@ -2409,7 +2414,7 @@ xfs_imap(
}
/*
- * Compute and fill in value of m_in_maxlevels.
+ * Compute and fill in value of m_ino_geo.inobt_maxlevels.
*/
void
xfs_ialloc_compute_maxlevels(
@@ -2418,8 +2423,8 @@ xfs_ialloc_compute_maxlevels(
uint inodes;
inodes = (1LL << XFS_INO_AGINO_BITS(mp)) >> XFS_INODES_PER_CHUNK_LOG;
- mp->m_in_maxlevels = xfs_btree_compute_maxlevels(mp->m_inobt_mnr,
- inodes);
+ M_IGEO(mp)->inobt_maxlevels = xfs_btree_compute_maxlevels(
+ M_IGEO(mp)->inobt_mnr, inodes);
}
/*
@@ -28,9 +28,9 @@ static inline int
xfs_icluster_size_fsb(
struct xfs_mount *mp)
{
- if (mp->m_sb.sb_blocksize >= mp->m_inode_cluster_size)
+ if (mp->m_sb.sb_blocksize >= M_IGEO(mp)->inode_cluster_size)
return 1;
- return mp->m_inode_cluster_size >> mp->m_sb.sb_blocklog;
+ return M_IGEO(mp)->inode_cluster_size >> mp->m_sb.sb_blocklog;
}
/*
@@ -96,7 +96,7 @@ xfs_imap(
uint flags); /* flags for inode btree lookup */
/*
- * Compute and fill in value of m_in_maxlevels.
+ * Compute and fill in value of m_ino_geo.inobt_maxlevels.
*/
void
xfs_ialloc_compute_maxlevels(
@@ -28,7 +28,7 @@ xfs_inobt_get_minrecs(
struct xfs_btree_cur *cur,
int level)
{
- return cur->bc_mp->m_inobt_mnr[level != 0];
+ return M_IGEO(cur->bc_mp)->inobt_mnr[level != 0];
}
STATIC struct xfs_btree_cur *
@@ -164,7 +164,7 @@ xfs_inobt_get_maxrecs(
struct xfs_btree_cur *cur,
int level)
{
- return cur->bc_mp->m_inobt_mxr[level != 0];
+ return M_IGEO(cur->bc_mp)->inobt_mxr[level != 0];
}
STATIC void
@@ -281,10 +281,11 @@ xfs_inobt_verify(
/* level verification */
level = be16_to_cpu(block->bb_level);
- if (level >= mp->m_in_maxlevels)
+ if (level >= M_IGEO(mp)->inobt_maxlevels)
return __this_address;
- return xfs_btree_sblock_verify(bp, mp->m_inobt_mxr[level != 0]);
+ return xfs_btree_sblock_verify(bp,
+ M_IGEO(mp)->inobt_mxr[level != 0]);
}
static void
@@ -546,7 +547,7 @@ xfs_inobt_max_size(
xfs_agblock_t agblocks = xfs_ag_block_count(mp, agno);
/* Bail out if we're uninitialized, which can happen in mkfs. */
- if (mp->m_inobt_mxr[0] == 0)
+ if (M_IGEO(mp)->inobt_mxr[0] == 0)
return 0;
/*
@@ -558,7 +559,7 @@ xfs_inobt_max_size(
XFS_FSB_TO_AGNO(mp, mp->m_sb.sb_logstart) == agno)
agblocks -= mp->m_sb.sb_logblocks;
- return xfs_btree_calc_size(mp->m_inobt_mnr,
+ return xfs_btree_calc_size(M_IGEO(mp)->inobt_mnr,
(uint64_t)agblocks * mp->m_sb.sb_inopblock /
XFS_INODES_PER_CHUNK);
}
@@ -619,5 +620,5 @@ xfs_iallocbt_calc_size(
struct xfs_mount *mp,
unsigned long long len)
{
- return xfs_btree_calc_size(mp->m_inobt_mnr, len);
+ return xfs_btree_calc_size(M_IGEO(mp)->inobt_mnr, len);
}
@@ -36,7 +36,7 @@ xfs_inobp_check(
int j;
xfs_dinode_t *dip;
- j = mp->m_inode_cluster_size >> mp->m_sb.sb_inodelog;
+ j = M_IGEO(mp)->inode_cluster_size >> mp->m_sb.sb_inodelog;
for (i = 0; i < j; i++) {
dip = xfs_buf_offset(bp, i * mp->m_sb.sb_inodesize);
@@ -804,16 +804,18 @@ const struct xfs_buf_ops xfs_sb_quiet_buf_ops = {
*/
void
xfs_sb_mount_common(
- struct xfs_mount *mp,
- struct xfs_sb *sbp)
+ struct xfs_mount *mp,
+ struct xfs_sb *sbp)
{
+ struct xfs_ino_geometry *igeo = M_IGEO(mp);
+
mp->m_agfrotor = mp->m_agirotor = 0;
mp->m_maxagi = mp->m_sb.sb_agcount;
mp->m_blkbit_log = sbp->sb_blocklog + XFS_NBBYLOG;
mp->m_blkbb_log = sbp->sb_blocklog - BBSHIFT;
mp->m_sectbb_log = sbp->sb_sectlog - BBSHIFT;
mp->m_agno_log = xfs_highbit32(sbp->sb_agcount - 1) + 1;
- mp->m_agino_log = sbp->sb_inopblog + sbp->sb_agblklog;
+ igeo->agino_log = sbp->sb_inopblog + sbp->sb_agblklog;
mp->m_blockmask = sbp->sb_blocksize - 1;
mp->m_blockwsize = sbp->sb_blocksize >> XFS_WORDLOG;
mp->m_blockwmask = mp->m_blockwsize - 1;
@@ -823,10 +825,10 @@ xfs_sb_mount_common(
mp->m_alloc_mnr[0] = mp->m_alloc_mxr[0] / 2;
mp->m_alloc_mnr[1] = mp->m_alloc_mxr[1] / 2;
- mp->m_inobt_mxr[0] = xfs_inobt_maxrecs(mp, sbp->sb_blocksize, 1);
- mp->m_inobt_mxr[1] = xfs_inobt_maxrecs(mp, sbp->sb_blocksize, 0);
- mp->m_inobt_mnr[0] = mp->m_inobt_mxr[0] / 2;
- mp->m_inobt_mnr[1] = mp->m_inobt_mxr[1] / 2;
+ 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;
mp->m_bmap_dmxr[0] = xfs_bmbt_maxrecs(mp, sbp->sb_blocksize, 1);
mp->m_bmap_dmxr[1] = xfs_bmbt_maxrecs(mp, sbp->sb_blocksize, 0);
@@ -844,14 +846,14 @@ xfs_sb_mount_common(
mp->m_refc_mnr[1] = mp->m_refc_mxr[1] / 2;
mp->m_bsize = XFS_FSB_TO_BB(mp, 1);
- mp->m_ialloc_inos = max_t(uint16_t, XFS_INODES_PER_CHUNK,
+ igeo->ialloc_inos = max_t(uint16_t, XFS_INODES_PER_CHUNK,
sbp->sb_inopblock);
- mp->m_ialloc_blks = mp->m_ialloc_inos >> sbp->sb_inopblog;
+ igeo->ialloc_blks = igeo->ialloc_inos >> sbp->sb_inopblog;
if (sbp->sb_spino_align)
- mp->m_ialloc_min_blks = sbp->sb_spino_align;
+ igeo->ialloc_min_blks = sbp->sb_spino_align;
else
- mp->m_ialloc_min_blks = mp->m_ialloc_blks;
+ igeo->ialloc_min_blks = igeo->ialloc_blks;
mp->m_alloc_set_aside = xfs_alloc_set_aside(mp);
mp->m_ag_max_usable = xfs_alloc_ag_max_usable(mp);
}
@@ -136,9 +136,10 @@ STATIC uint
xfs_calc_inobt_res(
struct xfs_mount *mp)
{
- return xfs_calc_buf_res(mp->m_in_maxlevels, XFS_FSB_TO_B(mp, 1)) +
- xfs_calc_buf_res(xfs_allocfree_log_count(mp, 1),
- XFS_FSB_TO_B(mp, 1));
+ return xfs_calc_buf_res(M_IGEO(mp)->inobt_maxlevels,
+ XFS_FSB_TO_B(mp, 1)) +
+ xfs_calc_buf_res(xfs_allocfree_log_count(mp, 1),
+ XFS_FSB_TO_B(mp, 1));
}
/*
@@ -167,7 +168,7 @@ xfs_calc_finobt_res(
* includes:
*
* the allocation btrees: 2 trees * (max depth - 1) * block size
- * the inode chunk: m_ialloc_blks * N
+ * the inode chunk: m_ino_geo.ialloc_blks * N
*
* The size N of the inode chunk reservation depends on whether it is for
* allocation or free and which type of create transaction is in use. An inode
@@ -193,7 +194,7 @@ xfs_calc_inode_chunk_res(
size = XFS_FSB_TO_B(mp, 1);
}
- res += xfs_calc_buf_res(mp->m_ialloc_blks, size);
+ res += xfs_calc_buf_res(M_IGEO(mp)->ialloc_blks, size);
return res;
}
@@ -307,7 +308,8 @@ xfs_calc_iunlink_remove_reservation(
struct xfs_mount *mp)
{
return xfs_calc_buf_res(1, mp->m_sb.sb_sectsize) +
- 2 * max_t(uint, XFS_FSB_TO_B(mp, 1), mp->m_inode_cluster_size);
+ 2 * max_t(uint, XFS_FSB_TO_B(mp, 1),
+ M_IGEO(mp)->inode_cluster_size);
}
/*
@@ -345,7 +347,8 @@ STATIC uint
xfs_calc_iunlink_add_reservation(xfs_mount_t *mp)
{
return xfs_calc_buf_res(1, mp->m_sb.sb_sectsize) +
- max_t(uint, XFS_FSB_TO_B(mp, 1), mp->m_inode_cluster_size);
+ max_t(uint, XFS_FSB_TO_B(mp, 1),
+ M_IGEO(mp)->inode_cluster_size);
}
/*
@@ -56,9 +56,9 @@
#define XFS_DIRREMOVE_SPACE_RES(mp) \
XFS_DAREMOVE_SPACE_RES(mp, XFS_DATA_FORK)
#define XFS_IALLOC_SPACE_RES(mp) \
- ((mp)->m_ialloc_blks + \
+ (M_IGEO(mp)->ialloc_blks + \
(xfs_sb_version_hasfinobt(&mp->m_sb) ? 2 : 1 * \
- ((mp)->m_in_maxlevels - 1)))
+ (M_IGEO(mp)->inobt_maxlevels - 1)))
/*
* Space reservation values for various transactions.
@@ -94,7 +94,8 @@
#define XFS_SYMLINK_SPACE_RES(mp,nl,b) \
(XFS_IALLOC_SPACE_RES(mp) + XFS_DIRENTER_SPACE_RES(mp,nl) + (b))
#define XFS_IFREE_SPACE_RES(mp) \
- (xfs_sb_version_hasfinobt(&mp->m_sb) ? (mp)->m_in_maxlevels : 0)
+ (xfs_sb_version_hasfinobt(&mp->m_sb) ? \
+ M_IGEO(mp)->inobt_maxlevels : 0)
#endif /* __XFS_TRANS_SPACE_H__ */
@@ -87,14 +87,14 @@ xfs_agino_range(
* Calculate the first inode, which will be in the first
* cluster-aligned block after the AGFL.
*/
- bno = round_up(XFS_AGFL_BLOCK(mp) + 1, mp->m_cluster_align);
+ bno = round_up(XFS_AGFL_BLOCK(mp) + 1, M_IGEO(mp)->cluster_align);
*first = XFS_AGB_TO_AGINO(mp, bno);
/*
* Calculate the last inode, which will be at the end of the
* last (aligned) cluster that can be allocated in the AG.
*/
- bno = round_down(eoag, mp->m_cluster_align);
+ bno = round_down(eoag, M_IGEO(mp)->cluster_align);
*last = XFS_AGB_TO_AGINO(mp, bno) - 1;
}
@@ -230,7 +230,7 @@ xchk_iallocbt_check_cluster(
int error = 0;
nr_inodes = min_t(unsigned int, XFS_INODES_PER_CHUNK,
- mp->m_inodes_per_cluster);
+ M_IGEO(mp)->inodes_per_cluster);
/* Map this inode cluster */
agbno = XFS_AGINO_TO_AGBNO(mp, irec->ir_startino + cluster_base);
@@ -251,7 +251,7 @@ xchk_iallocbt_check_cluster(
*/
ir_holemask = (irec->ir_holemask & cluster_mask);
imap.im_blkno = XFS_AGB_TO_DADDR(mp, agno, agbno);
- imap.im_len = XFS_FSB_TO_BB(mp, mp->m_blocks_per_cluster);
+ imap.im_len = XFS_FSB_TO_BB(mp, M_IGEO(mp)->blocks_per_cluster);
imap.im_boffset = XFS_INO_TO_OFFSET(mp, irec->ir_startino) <<
mp->m_sb.sb_inodelog;
@@ -276,12 +276,12 @@ xchk_iallocbt_check_cluster(
/* If any part of this is a hole, skip it. */
if (ir_holemask) {
xchk_xref_is_not_owned_by(bs->sc, agbno,
- mp->m_blocks_per_cluster,
+ M_IGEO(mp)->blocks_per_cluster,
&XFS_RMAP_OINFO_INODES);
return 0;
}
- xchk_xref_is_owned_by(bs->sc, agbno, mp->m_blocks_per_cluster,
+ xchk_xref_is_owned_by(bs->sc, agbno, M_IGEO(mp)->blocks_per_cluster,
&XFS_RMAP_OINFO_INODES);
/* Grab the inode cluster buffer. */
@@ -333,7 +333,7 @@ xchk_iallocbt_check_clusters(
*/
for (cluster_base = 0;
cluster_base < XFS_INODES_PER_CHUNK;
- cluster_base += bs->sc->mp->m_inodes_per_cluster) {
+ cluster_base += M_IGEO(bs->sc->mp)->inodes_per_cluster) {
error = xchk_iallocbt_check_cluster(bs, irec, cluster_base);
if (error)
break;
@@ -355,6 +355,7 @@ xchk_iallocbt_rec_alignment(
{
struct xfs_mount *mp = bs->sc->mp;
struct xchk_iallocbt *iabt = bs->private;
+ struct xfs_ino_geometry *igeo = M_IGEO(mp);
/*
* finobt records have different positioning requirements than inobt
@@ -372,7 +373,7 @@ xchk_iallocbt_rec_alignment(
unsigned int imask;
imask = min_t(unsigned int, XFS_INODES_PER_CHUNK,
- mp->m_cluster_align_inodes) - 1;
+ igeo->cluster_align_inodes) - 1;
if (irec->ir_startino & imask)
xchk_btree_set_corrupt(bs->sc, bs->cur, 0);
return;
@@ -400,17 +401,17 @@ xchk_iallocbt_rec_alignment(
}
/* inobt records must be aligned to cluster and inoalignmnt size. */
- if (irec->ir_startino & (mp->m_cluster_align_inodes - 1)) {
+ if (irec->ir_startino & (igeo->cluster_align_inodes - 1)) {
xchk_btree_set_corrupt(bs->sc, bs->cur, 0);
return;
}
- if (irec->ir_startino & (mp->m_inodes_per_cluster - 1)) {
+ if (irec->ir_startino & (igeo->inodes_per_cluster - 1)) {
xchk_btree_set_corrupt(bs->sc, bs->cur, 0);
return;
}
- if (mp->m_inodes_per_cluster <= XFS_INODES_PER_CHUNK)
+ if (igeo->inodes_per_cluster <= XFS_INODES_PER_CHUNK)
return;
/*
@@ -419,7 +420,7 @@ xchk_iallocbt_rec_alignment(
* after this one.
*/
iabt->next_startino = irec->ir_startino + XFS_INODES_PER_CHUNK;
- iabt->next_cluster_ino = irec->ir_startino + mp->m_inodes_per_cluster;
+ iabt->next_cluster_ino = irec->ir_startino + igeo->inodes_per_cluster;
}
/* Scrub an inobt/finobt record. */
@@ -144,7 +144,7 @@ xchk_quota_item(
if (bsoft > bhard)
xchk_fblock_set_corrupt(sc, XFS_DATA_FORK, offset);
- if (ihard > mp->m_maxicount)
+ if (ihard > M_IGEO(mp)->maxicount)
xchk_fblock_set_warning(sc, XFS_DATA_FORK, offset);
if (isoft > ihard)
xchk_fblock_set_corrupt(sc, XFS_DATA_FORK, offset);
@@ -251,9 +251,9 @@ xfs_growfs_data(
if (mp->m_sb.sb_imax_pct) {
uint64_t icount = mp->m_sb.sb_dblocks * mp->m_sb.sb_imax_pct;
do_div(icount, 100);
- mp->m_maxicount = XFS_FSB_TO_INO(mp, icount);
+ M_IGEO(mp)->maxicount = XFS_FSB_TO_INO(mp, icount);
} else
- mp->m_maxicount = 0;
+ M_IGEO(mp)->maxicount = 0;
/* Update secondary superblocks now the physical grow has completed */
error = xfs_update_secondary_sbs(mp);
@@ -2537,13 +2537,14 @@ xfs_ifree_cluster(
xfs_inode_log_item_t *iip;
struct xfs_log_item *lip;
struct xfs_perag *pag;
+ struct xfs_ino_geometry *igeo = M_IGEO(mp);
xfs_ino_t inum;
inum = xic->first_ino;
pag = xfs_perag_get(mp, XFS_INO_TO_AGNO(mp, inum));
- nbufs = mp->m_ialloc_blks / mp->m_blocks_per_cluster;
+ nbufs = igeo->ialloc_blks / igeo->blocks_per_cluster;
- for (j = 0; j < nbufs; j++, inum += mp->m_inodes_per_cluster) {
+ for (j = 0; j < nbufs; j++, inum += igeo->inodes_per_cluster) {
/*
* The allocation bitmap tells us which inodes of the chunk were
* physically allocated. Skip the cluster if an inode falls into
@@ -2551,7 +2552,7 @@ xfs_ifree_cluster(
*/
ioffset = inum - xic->first_ino;
if ((xic->alloc & XFS_INOBT_MASK(ioffset)) == 0) {
- ASSERT(ioffset % mp->m_inodes_per_cluster == 0);
+ ASSERT(ioffset % igeo->inodes_per_cluster == 0);
continue;
}
@@ -2567,7 +2568,7 @@ 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 * mp->m_blocks_per_cluster,
+ mp->m_bsize * igeo->blocks_per_cluster,
XBF_UNMAPPED);
if (!bp)
@@ -2614,7 +2615,7 @@ xfs_ifree_cluster(
* transaction stale above, which means there is no point in
* even trying to lock them.
*/
- for (i = 0; i < mp->m_inodes_per_cluster; i++) {
+ for (i = 0; i < igeo->inodes_per_cluster; i++) {
retry:
rcu_read_lock();
ip = radix_tree_lookup(&pag->pag_ici_root,
@@ -3476,19 +3477,20 @@ xfs_iflush_cluster(
int cilist_size;
struct xfs_inode **cilist;
struct xfs_inode *cip;
+ struct xfs_ino_geometry *igeo = M_IGEO(mp);
int nr_found;
int clcount = 0;
int i;
pag = xfs_perag_get(mp, XFS_INO_TO_AGNO(mp, ip->i_ino));
- inodes_per_cluster = mp->m_inode_cluster_size >> mp->m_sb.sb_inodelog;
+ inodes_per_cluster = igeo->inode_cluster_size >> mp->m_sb.sb_inodelog;
cilist_size = inodes_per_cluster * sizeof(xfs_inode_t *);
cilist = kmem_alloc(cilist_size, KM_MAYFAIL|KM_NOFS);
if (!cilist)
goto out_put;
- mask = ~(((mp->m_inode_cluster_size >> mp->m_sb.sb_inodelog)) - 1);
+ mask = ~(((igeo->inode_cluster_size >> mp->m_sb.sb_inodelog)) - 1);
first_index = XFS_INO_TO_AGINO(mp, ip->i_ino) & mask;
rcu_read_lock();
/* really need a gang lookup range call here */
@@ -167,6 +167,7 @@ xfs_bulkstat_ichunk_ra(
xfs_agnumber_t agno,
struct xfs_inobt_rec_incore *irec)
{
+ struct xfs_ino_geometry *igeo = M_IGEO(mp);
xfs_agblock_t agbno;
struct blk_plug plug;
int i; /* inode chunk index */
@@ -174,12 +175,14 @@ xfs_bulkstat_ichunk_ra(
agbno = XFS_AGINO_TO_AGBNO(mp, irec->ir_startino);
blk_start_plug(&plug);
- for (i = 0; i < XFS_INODES_PER_CHUNK;
- i += mp->m_inodes_per_cluster, agbno += mp->m_blocks_per_cluster) {
- if (xfs_inobt_maskn(i, mp->m_inodes_per_cluster) &
+ for (i = 0;
+ i < XFS_INODES_PER_CHUNK;
+ i += igeo->inodes_per_cluster,
+ agbno += igeo->blocks_per_cluster) {
+ if (xfs_inobt_maskn(i, igeo->inodes_per_cluster) &
~irec->ir_free) {
xfs_btree_reada_bufs(mp, agno, agbno,
- mp->m_blocks_per_cluster,
+ igeo->blocks_per_cluster,
&xfs_inode_buf_ops);
}
}
@@ -2882,19 +2882,19 @@ xlog_recover_buffer_pass2(
*
* Also make sure that only inode buffers with good sizes stay in
* the buffer cache. The kernel moves inodes in buffers of 1 block
- * or mp->m_inode_cluster_size bytes, whichever is bigger. The inode
+ * or inode_cluster_size bytes, whichever is bigger. The inode
* buffers in the log can be a different size if the log was generated
* by an older kernel using unclustered inode buffers or a newer kernel
* running with a different inode cluster size. Regardless, if the
- * the inode buffer size isn't max(blocksize, mp->m_inode_cluster_size)
- * for *our* value of mp->m_inode_cluster_size, then we need to keep
+ * the inode buffer size isn't max(blocksize, inode_cluster_size)
+ * for *our* value of inode_cluster_size, then we need to keep
* the buffer out of the buffer cache so that the buffer won't
* overlap with future reads of those inodes.
*/
if (XFS_DINODE_MAGIC ==
be16_to_cpu(*((__be16 *)xfs_buf_offset(bp, 0))) &&
(BBTOB(bp->b_io_length) != max(log->l_mp->m_sb.sb_blocksize,
- (uint32_t)log->l_mp->m_inode_cluster_size))) {
+ M_IGEO(log->l_mp)->inode_cluster_size))) {
xfs_buf_stale(bp);
error = xfs_bwrite(bp);
} else {
@@ -3849,6 +3849,7 @@ xlog_recover_do_icreate_pass2(
{
struct xfs_mount *mp = log->l_mp;
struct xfs_icreate_log *icl;
+ struct xfs_ino_geometry *igeo = M_IGEO(mp);
xfs_agnumber_t agno;
xfs_agblock_t agbno;
unsigned int count;
@@ -3898,10 +3899,10 @@ xlog_recover_do_icreate_pass2(
/*
* The inode chunk is either full or sparse and we only support
- * m_ialloc_min_blks sized sparse allocations at this time.
+ * m_ino_geo.ialloc_min_blks sized sparse allocations at this time.
*/
- if (length != mp->m_ialloc_blks &&
- length != mp->m_ialloc_min_blks) {
+ if (length != igeo->ialloc_blks &&
+ length != igeo->ialloc_min_blks) {
xfs_warn(log->l_mp,
"%s: unsupported chunk length", __FUNCTION__);
return -EINVAL;
@@ -3921,13 +3922,13 @@ xlog_recover_do_icreate_pass2(
* buffers for cancellation so we don't overwrite anything written after
* a cancellation.
*/
- bb_per_cluster = XFS_FSB_TO_BB(mp, mp->m_blocks_per_cluster);
- nbufs = length / mp->m_blocks_per_cluster;
+ bb_per_cluster = XFS_FSB_TO_BB(mp, igeo->blocks_per_cluster);
+ nbufs = length / igeo->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 * mp->m_blocks_per_cluster);
+ agbno + i * igeo->blocks_per_cluster);
if (xlog_check_buffer_cancelled(log, daddr, bb_per_cluster, 0))
cancel_count++;
}
@@ -433,10 +433,12 @@ xfs_update_alignment(xfs_mount_t *mp)
* Set the maximum inode count for this filesystem
*/
STATIC void
-xfs_set_maxicount(xfs_mount_t *mp)
+xfs_set_maxicount(
+ struct xfs_mount *mp)
{
- xfs_sb_t *sbp = &(mp->m_sb);
- uint64_t icount;
+ struct xfs_sb *sbp = &(mp->m_sb);
+ struct xfs_ino_geometry *igeo = M_IGEO(mp);
+ uint64_t icount;
if (sbp->sb_imax_pct) {
/*
@@ -445,11 +447,11 @@ xfs_set_maxicount(xfs_mount_t *mp)
*/
icount = sbp->sb_dblocks * sbp->sb_imax_pct;
do_div(icount, 100);
- do_div(icount, mp->m_ialloc_blks);
- mp->m_maxicount = (icount * mp->m_ialloc_blks) <<
- sbp->sb_inopblog;
+ do_div(icount, igeo->ialloc_blks);
+ igeo->maxicount = XFS_FSB_TO_INO(mp,
+ icount * igeo->ialloc_blks);
} else {
- mp->m_maxicount = 0;
+ igeo->maxicount = 0;
}
}
@@ -518,18 +520,18 @@ xfs_set_inoalignment(xfs_mount_t *mp)
{
if (xfs_sb_version_hasalign(&mp->m_sb) &&
mp->m_sb.sb_inoalignmt >= xfs_icluster_size_fsb(mp))
- mp->m_inoalign_mask = mp->m_sb.sb_inoalignmt - 1;
+ M_IGEO(mp)->inoalign_mask = mp->m_sb.sb_inoalignmt - 1;
else
- mp->m_inoalign_mask = 0;
+ M_IGEO(mp)->inoalign_mask = 0;
/*
* If we are using stripe alignment, check whether
* the stripe unit is a multiple of the inode alignment
*/
- if (mp->m_dalign && mp->m_inoalign_mask &&
- !(mp->m_dalign & mp->m_inoalign_mask))
- mp->m_sinoalign = mp->m_dalign;
+ if (mp->m_dalign && M_IGEO(mp)->inoalign_mask &&
+ !(mp->m_dalign & M_IGEO(mp)->inoalign_mask))
+ M_IGEO(mp)->ialloc_align = mp->m_dalign;
else
- mp->m_sinoalign = 0;
+ M_IGEO(mp)->ialloc_align = 0;
}
/*
@@ -683,6 +685,7 @@ xfs_mountfs(
{
struct xfs_sb *sbp = &(mp->m_sb);
struct xfs_inode *rip;
+ struct xfs_ino_geometry *igeo = M_IGEO(mp);
uint64_t resblks;
uint quotamount = 0;
uint quotaflags = 0;
@@ -797,18 +800,20 @@ xfs_mountfs(
* has set the inode alignment value appropriately for larger cluster
* sizes.
*/
- mp->m_inode_cluster_size = XFS_INODE_BIG_CLUSTER_SIZE;
+ igeo->inode_cluster_size = XFS_INODE_BIG_CLUSTER_SIZE;
if (xfs_sb_version_hascrc(&mp->m_sb)) {
- int new_size = mp->m_inode_cluster_size;
+ 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))
- mp->m_inode_cluster_size = new_size;
+ igeo->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);
- mp->m_cluster_align = xfs_ialloc_cluster_alignment(mp);
- mp->m_cluster_align_inodes = XFS_FSB_TO_INO(mp, mp->m_cluster_align);
+ igeo->blocks_per_cluster = xfs_icluster_size_fsb(mp);
+ igeo->inodes_per_cluster = XFS_FSB_TO_INO(mp,
+ igeo->blocks_per_cluster);
+ igeo->cluster_align = xfs_ialloc_cluster_alignment(mp);
+ igeo->cluster_align_inodes = XFS_FSB_TO_INO(mp,
+ igeo->cluster_align);
/*
* If enabled, sparse inode chunk alignment is expected to match the
@@ -817,11 +822,11 @@ xfs_mountfs(
*/
if (xfs_sb_version_hassparseinodes(&mp->m_sb) &&
mp->m_sb.sb_spino_align !=
- XFS_B_TO_FSBT(mp, mp->m_inode_cluster_size)) {
+ XFS_B_TO_FSBT(mp, igeo->inode_cluster_size)) {
xfs_warn(mp,
"Sparse inode block alignment (%u) must match cluster size (%llu).",
mp->m_sb.sb_spino_align,
- XFS_B_TO_FSBT(mp, mp->m_inode_cluster_size));
+ XFS_B_TO_FSBT(mp, igeo->inode_cluster_size));
error = -EINVAL;
goto out_remove_uuid;
}
@@ -105,6 +105,7 @@ typedef struct xfs_mount {
struct xfs_da_geometry *m_dir_geo; /* directory block geometry */
struct xfs_da_geometry *m_attr_geo; /* attribute block geometry */
struct xlog *m_log; /* log specific stuff */
+ struct xfs_ino_geometry m_ino_geo; /* inode geometry */
int m_logbufs; /* number of log buffers */
int m_logbsize; /* size of each log buffer */
uint m_rsumlevels; /* rt summary levels */
@@ -126,12 +127,6 @@ typedef struct xfs_mount {
uint8_t m_blkbit_log; /* blocklog + NBBY */
uint8_t m_blkbb_log; /* blocklog - BBSHIFT */
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;
- unsigned int m_cluster_align;
- unsigned int m_cluster_align_inodes;
uint m_blockmask; /* sb_blocksize-1 */
uint m_blockwsize; /* sb_blocksize in words */
uint m_blockwmask; /* blockwsize-1 */
@@ -139,15 +134,12 @@ typedef struct xfs_mount {
uint m_alloc_mnr[2]; /* min alloc btree records */
uint m_bmap_dmxr[2]; /* max bmap btree records */
uint m_bmap_dmnr[2]; /* min bmap btree records */
- uint m_inobt_mxr[2]; /* max inobt btree records */
- uint m_inobt_mnr[2]; /* min inobt btree records */
uint m_rmap_mxr[2]; /* max rmap btree records */
uint m_rmap_mnr[2]; /* min rmap btree records */
uint m_refc_mxr[2]; /* max refc btree records */
uint m_refc_mnr[2]; /* min refc btree records */
uint m_ag_maxlevels; /* XFS_AG_MAXLEVELS */
uint m_bm_maxlevels[2]; /* XFS_BM_MAXLEVELS */
- uint m_in_maxlevels; /* max inobt btree levels. */
uint m_rmap_maxlevels; /* max rmap btree levels */
uint m_refc_maxlevels; /* max refcount btree level */
xfs_extlen_t m_ag_prealloc_blocks; /* reserved ag blocks */
@@ -159,20 +151,13 @@ typedef struct xfs_mount {
int m_fixedfsid[2]; /* unchanged for life of FS */
uint64_t m_flags; /* global mount flags */
bool m_finobt_nores; /* no per-AG finobt resv. */
- int m_ialloc_inos; /* inodes in inode allocation */
- int m_ialloc_blks; /* blocks in inode allocation */
- int m_ialloc_min_blks;/* min blocks in sparse inode
- * allocation */
- int m_inoalign_mask;/* mask sb_inoalignmt if used */
uint m_qflags; /* quota status flags */
struct xfs_trans_resv m_resv; /* precomputed res values */
- uint64_t m_maxicount; /* maximum inode count */
uint64_t m_resblks; /* total reserved blocks */
uint64_t m_resblks_avail;/* available reserved blocks */
uint64_t m_resblks_save; /* reserved blks @ remount,ro */
int m_dalign; /* stripe unit */
int m_swidth; /* stripe width */
- int m_sinoalign; /* stripe unit inode alignment */
uint8_t m_sectbb_log; /* sectlog - BBSHIFT */
const struct xfs_nameops *m_dirnameops; /* vector of dir name ops */
const struct xfs_dir_ops *m_dir_inode_ops; /* vector of dir inode ops */
@@ -226,6 +211,8 @@ typedef struct xfs_mount {
#endif
} xfs_mount_t;
+#define M_IGEO(mp) (&(mp)->m_ino_geo)
+
/*
* Flags for m_flags.
*/
@@ -582,7 +582,7 @@ xfs_set_inode_alloc(
* Calculate how much should be reserved for inodes to meet
* the max inode percentage. Used only for inode32.
*/
- if (mp->m_maxicount) {
+ if (M_IGEO(mp)->maxicount) {
uint64_t icount;
icount = sbp->sb_dblocks * sbp->sb_imax_pct;
@@ -1131,10 +1131,10 @@ xfs_fs_statfs(
fakeinos = XFS_FSB_TO_INO(mp, statp->f_bfree);
statp->f_files = min(icount + fakeinos, (uint64_t)XFS_MAXINUMBER);
- if (mp->m_maxicount)
+ if (M_IGEO(mp)->maxicount)
statp->f_files = min_t(typeof(statp->f_files),
statp->f_files,
- mp->m_maxicount);
+ M_IGEO(mp)->maxicount);
/* If sb_icount overshot maxicount, report actual allocation */
statp->f_files = max_t(typeof(statp->f_files),