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xfs: introduce v5 inode group structure 

Introduce a new "v5" inode group structure that fixes the alignment
and padding problems of the existing structure.

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 2019-07-03 20:36:27 -07:00
parent 7035f9724f
commit 5f19c7fc68
7 changed files with 42 additions and 9 deletions
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11
fs/xfs/libxfs/xfs_fs.h
View File

@ -445,6 +445,17 @@ struct xfs_inogrp {
__u64 xi_allocmask; /* mask of allocated inodes */
};
/* New inumbers structure that reports v5 features and fixes padding issues */
struct xfs_inumbers {
uint64_t xi_startino; /* starting inode number */
uint64_t xi_allocmask; /* mask of allocated inodes */
uint8_t xi_alloccount; /* # bits set in allocmask */
uint8_t xi_version; /* version */
uint8_t xi_padding[6]; /* zero */
};
#define XFS_INUMBERS_VERSION_V1 (1)
#define XFS_INUMBERS_VERSION_V5 (5)
/*
* Error injection.

9
fs/xfs/xfs_ioctl.c
View File

@ -729,10 +729,13 @@ xfs_fsbulkstat_one_fmt(
int
xfs_fsinumbers_fmt(
struct xfs_ibulk *breq,
const struct xfs_inogrp *igrp)
struct xfs_ibulk *breq,
const struct xfs_inumbers *igrp)
{
if (copy_to_user(breq->ubuffer, igrp, sizeof(*igrp)))
struct xfs_inogrp ig1;
xfs_inumbers_to_inogrp(&ig1, igrp);
if (copy_to_user(breq->ubuffer, &ig1, sizeof(struct xfs_inogrp)))
return -EFAULT;
return xfs_ibulk_advance(breq, sizeof(struct xfs_inogrp));
}

2
fs/xfs/xfs_ioctl.h
View File

@ -83,6 +83,6 @@ struct xfs_inogrp;
int xfs_fsbulkstat_one_fmt(struct xfs_ibulk *breq,
const struct xfs_bulkstat *bstat);
int xfs_fsinumbers_fmt(struct xfs_ibulk *breq, const struct xfs_inogrp *igrp);
int xfs_fsinumbers_fmt(struct xfs_ibulk *breq, const struct xfs_inumbers *igrp);
#endif

10
fs/xfs/xfs_ioctl32.c
View File

@ -81,10 +81,14 @@ xfs_compat_growfs_rt_copyin(
STATIC int
xfs_fsinumbers_fmt_compat(
struct xfs_ibulk *breq,
const struct xfs_inogrp *igrp)
struct xfs_ibulk *breq,
const struct xfs_inumbers *ig)
{
struct compat_xfs_inogrp __user *p32 = breq->ubuffer;
struct compat_xfs_inogrp __user *p32 = breq->ubuffer;
struct xfs_inogrp ig1;
struct xfs_inogrp *igrp = &ig1;
xfs_inumbers_to_inogrp(&ig1, ig);
if (put_user(igrp->xi_startino, &p32->xi_startino) ||
put_user(igrp->xi_alloccount, &p32->xi_alloccount) ||

14
fs/xfs/xfs_itable.c
View File

@ -331,10 +331,11 @@ xfs_inumbers_walk(
const struct xfs_inobt_rec_incore *irec,
void *data)
{
struct xfs_inogrp inogrp = {
struct xfs_inumbers inogrp = {
.xi_startino = XFS_AGINO_TO_INO(mp, agno, irec->ir_startino),
.xi_alloccount = irec->ir_count - irec->ir_freecount,
.xi_allocmask = ~irec->ir_free,
.xi_version = XFS_INUMBERS_VERSION_V5,
};
struct xfs_inumbers_chunk *ic = data;
xfs_agino_t agino;
@ -381,3 +382,14 @@ xfs_inumbers(
return error;
}
/* Convert an inumbers (v5) struct to a inogrp (v1) struct. */
void
xfs_inumbers_to_inogrp(
struct xfs_inogrp *ig1,
const struct xfs_inumbers *ig)
{
ig1->xi_startino = ig->xi_startino;
ig1->xi_alloccount = ig->xi_alloccount;
ig1->xi_allocmask = ig->xi_allocmask;
}

4
fs/xfs/xfs_itable.h
View File

@ -46,8 +46,10 @@ void xfs_bulkstat_to_bstat(struct xfs_mount *mp, struct xfs_bstat *bs1,
const struct xfs_bulkstat *bstat);
typedef int (*inumbers_fmt_pf)(struct xfs_ibulk *breq,
const struct xfs_inogrp *igrp);
const struct xfs_inumbers *igrp);
int xfs_inumbers(struct xfs_ibulk *breq, inumbers_fmt_pf formatter);
void xfs_inumbers_to_inogrp(struct xfs_inogrp *ig1,
const struct xfs_inumbers *ig);
#endif /* __XFS_ITABLE_H__ */

1
fs/xfs/xfs_ondisk.h
View File

@ -148,6 +148,7 @@ xfs_check_ondisk_structs(void)
XFS_CHECK_OFFSET(struct xfs_attr3_leafblock, hdr.info.hdr, 0);
XFS_CHECK_STRUCT_SIZE(struct xfs_bulkstat, 192);
XFS_CHECK_STRUCT_SIZE(struct xfs_inumbers, 24);
}
#endif /* __XFS_ONDISK_H */