[PATCH 4/9] xfs: introduce v5 inode group structure

Darrick J. Wong
2019-05-29T22:28:03Z

From: Darrick J. Wong <darrick.wong@oracle.com>

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>
---
fs/xfs/libxfs/xfs_fs.h | 11 +++++++++++
fs/xfs/xfs_ioctl.c | 9 ++++++---
fs/xfs/xfs_ioctl.h | 2 +-
fs/xfs/xfs_ioctl32.c | 10 +++++++---
fs/xfs/xfs_itable.c | 14 +++++++++++++-
fs/xfs/xfs_itable.h | 3 ++-
fs/xfs/xfs_ondisk.h | 1 +
7 files changed, 41 insertions(+), 9 deletions(-)

diff --git a/fs/xfs/libxfs/xfs_fs.h b/fs/xfs/libxfs/xfs_fs.h
index 132e364eb141..8b8fe78511fb 100644
--- a/fs/xfs/libxfs/xfs_fs.h
+++ b/fs/xfs/libxfs/xfs_fs.h
@@ -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.
diff --git a/fs/xfs/xfs_ioctl.c b/fs/xfs/xfs_ioctl.c
index 0f70005cbe61..e43ad688e683 100644
--- a/fs/xfs/xfs_ioctl.c
+++ b/fs/xfs/xfs_ioctl.c
@@ -737,10 +737,13 @@ 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));
}
diff --git a/fs/xfs/xfs_ioctl.h b/fs/xfs/xfs_ioctl.h
index 514d3028a134..654c0bb1bcf8 100644
--- a/fs/xfs/xfs_ioctl.h
+++ b/fs/xfs/xfs_ioctl.h
@@ -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
diff --git a/fs/xfs/xfs_ioctl32.c b/fs/xfs/xfs_ioctl32.c
index 9806d27892df..bfe71747776b 100644
--- a/fs/xfs/xfs_ioctl32.c
+++ b/fs/xfs/xfs_ioctl32.c
@@ -85,10 +85,14 @@ 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) ||
diff --git a/fs/xfs/xfs_itable.c b/fs/xfs/xfs_itable.c
index 764b7f98fd5b..8701596976bb 100644
--- a/fs/xfs/xfs_itable.c
+++ b/fs/xfs/xfs_itable.c
@@ -322,10 +322,11 @@ 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;
@@ -376,3 +377,14 @@ 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;
+}
diff --git a/fs/xfs/xfs_itable.h b/fs/xfs/xfs_itable.h
index 806069c9838c..2987f3eb335f 100644
--- a/fs/xfs/xfs_itable.h
+++ b/fs/xfs/xfs_itable.h
@@ -49,8 +49,9 @@ 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__ */
diff --git a/fs/xfs/xfs_ondisk.h b/fs/xfs/xfs_ondisk.h
index 0b4cdda68524..d8f941b4d51c 100644
--- a/fs/xfs/xfs_ondisk.h
+++ b/fs/xfs/xfs_ondisk.h
@@ -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 */