From f93e5436f0ee5a85eaa3a86d2614d215873fb18b Mon Sep 17 00:00:00 2001
From: "Darrick J. Wong" <darrick.wong@oracle.com>
Date: Mon, 17 Aug 2020 09:59:07 -0700
Subject: [PATCH] xfs: widen ondisk inode timestamps to deal with y2038+
Git-commit: f93e5436f0ee5a85eaa3a86d2614d215873fb18b
Patch-mainline: v5.10-rc1
References: bsc#1203387
Redesign the ondisk inode timestamps to be a simple unsigned 64-bit
counter of nanoseconds since 14 Dec 1901 (i.e. the minimum time in the
32-bit unix time epoch). This enables us to handle dates up to 2486,
which solves the y2038 problem.
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Gao Xiang <hsiangkao@redhat.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Acked-by: Anthony Iliopoulos <ailiop@suse.com>
---
fs/xfs/libxfs/xfs_format.h | 70 ++++++++++++++++++++++++++++++++++-
fs/xfs/libxfs/xfs_fs.h | 1 +
fs/xfs/libxfs/xfs_inode_buf.c | 59 +++++++++++++++++++++++------
fs/xfs/libxfs/xfs_inode_buf.h | 13 ++++++-
fs/xfs/libxfs/xfs_sb.c | 2 +
fs/xfs/xfs_inode.c | 4 +-
fs/xfs/xfs_inode.h | 5 +++
fs/xfs/xfs_inode_item.c | 12 ++++--
fs/xfs/xfs_ioctl.c | 3 +-
fs/xfs/xfs_ondisk.h | 12 ++++++
fs/xfs/xfs_super.c | 4 ++
fs/xfs/xfs_trans_inode.c | 11 ++++++
12 files changed, 176 insertions(+), 20 deletions(-)
diff --git a/fs/xfs/libxfs/xfs_format.h b/fs/xfs/libxfs/xfs_format.h
index f9d41590bc82..7c7bfd946509 100644
--- a/fs/xfs/libxfs/xfs_format.h
+++ b/fs/xfs/libxfs/xfs_format.h
@@ -478,6 +478,7 @@ xfs_sb_has_ro_compat_feature(
#define XFS_SB_FEAT_INCOMPAT_FTYPE (1 << 0) /* filetype in dirent */
#define XFS_SB_FEAT_INCOMPAT_SPINODES (1 << 1) /* sparse inode chunks */
#define XFS_SB_FEAT_INCOMPAT_META_UUID (1 << 2) /* metadata UUID */
+#define XFS_SB_FEAT_INCOMPAT_BIGTIME (1 << 3) /* large timestamps */
#define XFS_SB_FEAT_INCOMPAT_ALL \
(XFS_SB_FEAT_INCOMPAT_FTYPE| \
XFS_SB_FEAT_INCOMPAT_SPINODES| \
@@ -559,6 +560,12 @@ static inline bool xfs_sb_version_hasreflink(struct xfs_sb *sbp)
(sbp->sb_features_ro_compat & XFS_SB_FEAT_RO_COMPAT_REFLINK);
}
+static inline bool xfs_sb_version_hasbigtime(struct xfs_sb *sbp)
+{
+ return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5 &&
+ (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_BIGTIME);
+}
+
/*
* Inode btree block counter. We record the number of inobt and finobt blocks
* in the AGI header so that we can skip the finobt walk at mount time when
@@ -861,6 +868,13 @@ typedef struct xfs_agfl {
* Therefore, the ondisk min and max defined here can be used directly to
* constrain the incore timestamps on a Unix system. Note that we actually
* encode a __be64 value on disk.
+ *
+ * When the bigtime feature is enabled, ondisk inode timestamps become an
+ * unsigned 64-bit nanoseconds counter. This means that the bigtime inode
+ * timestamp epoch is the start of the classic timestamp range, which is
+ * Dec 31 20:45:52 UTC 1901. Because the epochs are not the same, callers
+ * /must/ use the bigtime conversion functions when encoding and decoding raw
+ * timestamps.
*/
typedef __be64 xfs_timestamp_t;
@@ -882,6 +896,50 @@ struct xfs_legacy_timestamp {
*/
#define XFS_LEGACY_TIME_MAX ((int64_t)S32_MAX)
+/*
+ * Smallest possible ondisk seconds value with bigtime timestamps. This
+ * corresponds (after conversion to a Unix timestamp) with the traditional
+ * minimum timestamp of Dec 13 20:45:52 UTC 1901.
+ */
+#define XFS_BIGTIME_TIME_MIN ((int64_t)0)
+
+/*
+ * Largest supported ondisk seconds value with bigtime timestamps. This
+ * corresponds (after conversion to a Unix timestamp) with an incore timestamp
+ * of Jul 2 20:20:24 UTC 2486.
+ *
+ * We round down the ondisk limit so that the bigtime quota and inode max
+ * timestamps will be the same.
+ */
+#define XFS_BIGTIME_TIME_MAX ((int64_t)((-1ULL / NSEC_PER_SEC) & ~0x3ULL))
+
+/*
+ * Bigtime epoch is set exactly to the minimum time value that a traditional
+ * 32-bit timestamp can represent when using the Unix epoch as a reference.
+ * Hence the Unix epoch is at a fixed offset into the supported bigtime
+ * timestamp range.
+ *
+ * The bigtime epoch also matches the minimum value an on-disk 32-bit XFS
+ * timestamp can represent so we will not lose any fidelity in converting
+ * to/from unix and bigtime timestamps.
+ *
+ * The following conversion factor converts a seconds counter from the Unix
+ * epoch to the bigtime epoch.
+ */
+#define XFS_BIGTIME_EPOCH_OFFSET (-(int64_t)S32_MIN)
+
+/* Convert a timestamp from the Unix epoch to the bigtime epoch. */
+static inline uint64_t xfs_unix_to_bigtime(time64_t unix_seconds)
+{
+ return (uint64_t)unix_seconds + XFS_BIGTIME_EPOCH_OFFSET;
+}
+
+/* Convert a timestamp from the bigtime epoch to the Unix epoch. */
+static inline time64_t xfs_bigtime_to_unix(uint64_t ondisk_seconds)
+{
+ return (time64_t)ondisk_seconds - XFS_BIGTIME_EPOCH_OFFSET;
+}
+
/*
* On-disk inode structure.
*
@@ -1093,12 +1151,22 @@ static inline void xfs_dinode_put_rdev(struct xfs_dinode *dip, xfs_dev_t rdev)
#define XFS_DIFLAG2_DAX_BIT 0 /* use DAX for this inode */
#define XFS_DIFLAG2_REFLINK_BIT 1 /* file's blocks may be shared */
#define XFS_DIFLAG2_COWEXTSIZE_BIT 2 /* copy on write extent size hint */
+#define XFS_DIFLAG2_BIGTIME_BIT 3 /* big timestamps */
+
#define XFS_DIFLAG2_DAX (1 << XFS_DIFLAG2_DAX_BIT)
#define XFS_DIFLAG2_REFLINK (1 << XFS_DIFLAG2_REFLINK_BIT)
#define XFS_DIFLAG2_COWEXTSIZE (1 << XFS_DIFLAG2_COWEXTSIZE_BIT)
+#define XFS_DIFLAG2_BIGTIME (1 << XFS_DIFLAG2_BIGTIME_BIT)
#define XFS_DIFLAG2_ANY \
- (XFS_DIFLAG2_DAX | XFS_DIFLAG2_REFLINK | XFS_DIFLAG2_COWEXTSIZE)
+ (XFS_DIFLAG2_DAX | XFS_DIFLAG2_REFLINK | XFS_DIFLAG2_COWEXTSIZE | \
+ XFS_DIFLAG2_BIGTIME)
+
+static inline bool xfs_dinode_has_bigtime(const struct xfs_dinode *dip)
+{
+ return dip->di_version >= 3 &&
+ (dip->di_flags2 & cpu_to_be64(XFS_DIFLAG2_BIGTIME));
+}
/*
* Inode number format:
diff --git a/fs/xfs/libxfs/xfs_fs.h b/fs/xfs/libxfs/xfs_fs.h
index e895d32a6b60..7f729dfd45bb 100644
--- a/fs/xfs/libxfs/xfs_fs.h
+++ b/fs/xfs/libxfs/xfs_fs.h
@@ -222,6 +222,7 @@ typedef struct xfs_fsop_resblks {
#define XFS_FSOP_GEOM_FLAGS_SPINODES 0x40000 /* sparse inode chunks */
#define XFS_FSOP_GEOM_FLAGS_RMAPBT 0x80000 /* reverse mapping btree */
#define XFS_FSOP_GEOM_FLAGS_REFLINK 0x100000 /* files can share blocks */
+#define XFS_FSOP_GEOM_FLAGS_BIGTIME (1 << 21) /* 64-bit nsec timestamps */
/*
* Minimum and maximum sizes need for growth checks.
diff --git a/fs/xfs/libxfs/xfs_inode_buf.c b/fs/xfs/libxfs/xfs_inode_buf.c
index 0213d1f41743..ac49f7b33f86 100644
--- a/fs/xfs/libxfs/xfs_inode_buf.c
+++ b/fs/xfs/libxfs/xfs_inode_buf.c
@@ -209,14 +209,29 @@ xfs_imap_to_bp(
return 0;
}
+static inline struct timespec64 xfs_inode_decode_bigtime(uint64_t ts)
+{
+ struct timespec64 tv;
+ uint32_t n;
+
+ tv.tv_sec = xfs_bigtime_to_unix(div_u64_rem(ts, NSEC_PER_SEC, &n));
+ tv.tv_nsec = n;
+
+ return tv;
+}
+
/* Convert an ondisk timestamp to an incore timestamp. */
struct timespec64
xfs_inode_from_disk_ts(
+ struct xfs_dinode *dip,
const xfs_timestamp_t ts)
{
struct timespec64 tv;
struct xfs_legacy_timestamp *lts;
+ if (xfs_dinode_has_bigtime(dip))
+ return xfs_inode_decode_bigtime(be64_to_cpu(ts));
+
lts = (struct xfs_legacy_timestamp *)&ts;
tv.tv_sec = (int)be32_to_cpu(lts->t_sec);
tv.tv_nsec = (int)be32_to_cpu(lts->t_nsec);
@@ -260,9 +275,9 @@ xfs_inode_from_disk(
* a time before epoch is converted to a time long after epoch
* on 64 bit systems.
*/
- inode->i_atime = xfs_inode_from_disk_ts(from->di_atime);
- inode->i_mtime = xfs_inode_from_disk_ts(from->di_mtime);
- inode->i_ctime = xfs_inode_from_disk_ts(from->di_ctime);
+ inode->i_atime = xfs_inode_from_disk_ts(from, from->di_atime);
+ inode->i_mtime = xfs_inode_from_disk_ts(from, from->di_mtime);
+ inode->i_ctime = xfs_inode_from_disk_ts(from, from->di_ctime);
inode->i_generation = be32_to_cpu(from->di_gen);
inode->i_mode = be16_to_cpu(from->di_mode);
@@ -280,7 +295,7 @@ xfs_inode_from_disk(
if (to->di_version == 3) {
inode_set_iversion_queried(inode,
be64_to_cpu(from->di_changecount));
- to->di_crtime = xfs_inode_from_disk_ts(from->di_crtime);
+ to->di_crtime = xfs_inode_from_disk_ts(from, from->di_crtime);
to->di_flags2 = be64_to_cpu(from->di_flags2);
to->di_cowextsize = be32_to_cpu(from->di_cowextsize);
}
@@ -289,11 +304,15 @@ xfs_inode_from_disk(
/* Convert an incore timestamp to an ondisk timestamp. */
static inline xfs_timestamp_t
xfs_inode_to_disk_ts(
+ struct xfs_inode *ip,
const struct timespec64 tv)
{
struct xfs_legacy_timestamp *lts;
xfs_timestamp_t ts;
+ if (xfs_inode_has_bigtime(ip))
+ return cpu_to_be64(xfs_inode_encode_bigtime(tv));
+
lts = (struct xfs_legacy_timestamp *)&ts;
lts->t_sec = cpu_to_be32(tv.tv_sec);
lts->t_nsec = cpu_to_be32(tv.tv_nsec);
@@ -321,9 +340,9 @@ xfs_inode_to_disk(
to->di_projid_hi = cpu_to_be16(from->di_projid_hi);
memset(to->di_pad, 0, sizeof(to->di_pad));
- to->di_atime = xfs_inode_to_disk_ts(inode->i_atime);
- to->di_mtime = xfs_inode_to_disk_ts(inode->i_mtime);
- to->di_ctime = xfs_inode_to_disk_ts(inode->i_ctime);
+ to->di_atime = xfs_inode_to_disk_ts(ip, inode->i_atime);
+ to->di_mtime = xfs_inode_to_disk_ts(ip, inode->i_mtime);
+ to->di_ctime = xfs_inode_to_disk_ts(ip, inode->i_ctime);
to->di_nlink = cpu_to_be32(inode->i_nlink);
to->di_gen = cpu_to_be32(inode->i_generation);
to->di_mode = cpu_to_be16(inode->i_mode);
@@ -341,7 +360,7 @@ xfs_inode_to_disk(
if (from->di_version == 3) {
to->di_changecount = cpu_to_be64(inode_peek_iversion(inode));
- to->di_crtime = xfs_inode_to_disk_ts(from->di_crtime);
+ to->di_crtime = xfs_inode_to_disk_ts(ip, from->di_crtime);
to->di_flags2 = cpu_to_be64(from->di_flags2);
to->di_cowextsize = cpu_to_be32(from->di_cowextsize);
to->di_ino = cpu_to_be64(ip->i_ino);
@@ -354,15 +373,25 @@ xfs_inode_to_disk(
}
}
+static inline bool xfs_log_dinode_has_bigtime(const struct xfs_log_dinode *ld)
+{
+ return ld->di_version >= 3 &&
+ (ld->di_flags2 & XFS_DIFLAG2_BIGTIME);
+}
+
/* Convert a log timestamp to an ondisk timestamp. */
static inline xfs_timestamp_t
xfs_log_dinode_to_disk_ts(
+ struct xfs_log_dinode *from,
const xfs_ictimestamp_t its)
{
struct xfs_legacy_timestamp *lts;
struct xfs_legacy_ictimestamp *lits;
xfs_timestamp_t ts;
+ if (xfs_log_dinode_has_bigtime(from))
+ return cpu_to_be64(its);
+
lts = (struct xfs_legacy_timestamp *)&ts;
lits = (struct xfs_legacy_ictimestamp *)&its;
lts->t_sec = cpu_to_be32(lits->t_sec);
@@ -388,9 +417,9 @@ xfs_log_dinode_to_disk(
to->di_projid_hi = cpu_to_be16(from->di_projid_hi);
memcpy(to->di_pad, from->di_pad, sizeof(to->di_pad));
- to->di_atime = xfs_log_dinode_to_disk_ts(from->di_atime);
- to->di_mtime = xfs_log_dinode_to_disk_ts(from->di_mtime);
- to->di_ctime = xfs_log_dinode_to_disk_ts(from->di_ctime);
+ to->di_atime = xfs_log_dinode_to_disk_ts(from, from->di_atime);
+ to->di_mtime = xfs_log_dinode_to_disk_ts(from, from->di_mtime);
+ to->di_ctime = xfs_log_dinode_to_disk_ts(from, from->di_ctime);
to->di_size = cpu_to_be64(from->di_size);
to->di_nblocks = cpu_to_be64(from->di_nblocks);
@@ -406,7 +435,8 @@ xfs_log_dinode_to_disk(
if (from->di_version == 3) {
to->di_changecount = cpu_to_be64(from->di_changecount);
- to->di_crtime = xfs_log_dinode_to_disk_ts(from->di_crtime);
+ to->di_crtime = xfs_log_dinode_to_disk_ts(from,
+ from->di_crtime);
to->di_flags2 = cpu_to_be64(from->di_flags2);
to->di_cowextsize = cpu_to_be32(from->di_cowextsize);
to->di_ino = cpu_to_be64(from->di_ino);
@@ -474,6 +504,11 @@ xfs_dinode_verify(
if ((flags2 & XFS_DIFLAG2_REFLINK) && (flags2 & XFS_DIFLAG2_DAX))
return false;
+ /* bigtime iflag can only happen on bigtime filesystems */
+ if (xfs_dinode_has_bigtime(dip) &&
+ !xfs_sb_version_hasbigtime(&mp->m_sb))
+ return false;
+
return true;
}
diff --git a/fs/xfs/libxfs/xfs_inode_buf.h b/fs/xfs/libxfs/xfs_inode_buf.h
index f78e4ebe2d88..fa05fee2d6a0 100644
--- a/fs/xfs/libxfs/xfs_inode_buf.h
+++ b/fs/xfs/libxfs/xfs_inode_buf.h
@@ -50,6 +50,11 @@ struct xfs_icdinode {
struct timespec64 di_crtime; /* time created */
};
+static inline bool xfs_icdinode_has_bigtime(const struct xfs_icdinode *icd)
+{
+ return icd->di_flags2 & XFS_DIFLAG2_BIGTIME;
+}
+
/*
* Inode location information. Stored in the inode and passed to
* xfs_imap_to_bp() to get a buffer and dinode for a given inode.
@@ -83,6 +88,12 @@ void xfs_inobp_check(struct xfs_mount *, struct xfs_buf *);
bool xfs_dinode_verify(struct xfs_mount *mp, xfs_ino_t ino,
struct xfs_dinode *dip);
-struct timespec64 xfs_inode_from_disk_ts(const xfs_timestamp_t ts);
+static inline uint64_t xfs_inode_encode_bigtime(struct timespec64 tv)
+{
+ return xfs_unix_to_bigtime(tv.tv_sec) * NSEC_PER_SEC + tv.tv_nsec;
+}
+
+struct timespec64 xfs_inode_from_disk_ts(struct xfs_dinode *dip,
+ const xfs_timestamp_t ts);
#endif /* __XFS_INODE_BUF_H__ */
diff --git a/fs/xfs/libxfs/xfs_sb.c b/fs/xfs/libxfs/xfs_sb.c
index 465b35efd4d9..9738ed7e826a 100644
--- a/fs/xfs/libxfs/xfs_sb.c
+++ b/fs/xfs/libxfs/xfs_sb.c
@@ -1064,6 +1064,8 @@ xfs_fs_geometry(
geo->flags |= XFS_FSOP_GEOM_FLAGS_RMAPBT;
if (xfs_sb_version_hasreflink(sbp))
geo->flags |= XFS_FSOP_GEOM_FLAGS_REFLINK;
+ if (xfs_sb_version_hasbigtime(sbp))
+ geo->flags |= XFS_FSOP_GEOM_FLAGS_BIGTIME;
if (xfs_sb_version_hassector(sbp))
geo->logsectsize = sbp->sb_logsectsize;
else
diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c
index f19f2dee1652..ef0c8d77994a 100644
--- a/fs/xfs/xfs_inode.c
+++ b/fs/xfs/xfs_inode.c
@@ -871,7 +871,8 @@ xfs_ialloc(
if (ip->i_d.di_version == 3) {
inode_set_iversion(inode, 1);
- ip->i_d.di_flags2 = 0;
+ if (xfs_sb_version_hasbigtime(&mp->m_sb))
+ ip->i_d.di_flags2 |= XFS_DIFLAG2_BIGTIME;
ip->i_d.di_cowextsize = 0;
ip->i_d.di_crtime = tv;
}
@@ -2494,6 +2495,7 @@ xfs_ifree(
VFS_I(ip)->i_mode = 0; /* mark incore inode as free */
ip->i_d.di_flags = 0;
+ ip->i_d.di_flags2 = 0;
ip->i_d.di_dmevmask = 0;
ip->i_d.di_forkoff = 0; /* mark the attr fork not in use */
ip->i_d.di_format = XFS_DINODE_FMT_EXTENTS;
diff --git a/fs/xfs/xfs_inode.h b/fs/xfs/xfs_inode.h
index 4a92f910c3fb..200ed3854164 100644
--- a/fs/xfs/xfs_inode.h
+++ b/fs/xfs/xfs_inode.h
@@ -210,6 +210,11 @@ static inline bool xfs_is_reflink_inode(struct xfs_inode *ip)
return ip->i_d.di_flags2 & XFS_DIFLAG2_REFLINK;
}
+static inline bool xfs_inode_has_bigtime(struct xfs_inode *ip)
+{
+ return ip->i_d.di_flags2 & XFS_DIFLAG2_BIGTIME;
+}
+
/*
* In-core inode flags.
*/
diff --git a/fs/xfs/xfs_inode_item.c b/fs/xfs/xfs_inode_item.c
index ced6f4dfce2f..cf0d91c05239 100644
--- a/fs/xfs/xfs_inode_item.c
+++ b/fs/xfs/xfs_inode_item.c
@@ -316,11 +316,15 @@ xfs_inode_item_format_attr_fork(
*/
static inline xfs_ictimestamp_t
xfs_inode_to_log_dinode_ts(
+ struct xfs_inode *ip,
const struct timespec64 tv)
{
struct xfs_legacy_ictimestamp *lits;
xfs_ictimestamp_t its;
+ if (xfs_inode_has_bigtime(ip))
+ return xfs_inode_encode_bigtime(tv);
+
lits = (struct xfs_legacy_ictimestamp *)&its;
lits->t_sec = tv.tv_sec;
lits->t_nsec = tv.tv_nsec;
@@ -348,9 +352,9 @@ xfs_inode_to_log_dinode(
memset(to->di_pad, 0, sizeof(to->di_pad));
memset(to->di_pad3, 0, sizeof(to->di_pad3));
- to->di_atime = xfs_inode_to_log_dinode_ts(inode->i_atime);
- to->di_mtime = xfs_inode_to_log_dinode_ts(inode->i_mtime);
- to->di_ctime = xfs_inode_to_log_dinode_ts(inode->i_ctime);
+ to->di_atime = xfs_inode_to_log_dinode_ts(ip, inode->i_atime);
+ to->di_mtime = xfs_inode_to_log_dinode_ts(ip, inode->i_mtime);
+ to->di_ctime = xfs_inode_to_log_dinode_ts(ip, inode->i_ctime);
to->di_nlink = inode->i_nlink;
to->di_gen = inode->i_generation;
to->di_mode = inode->i_mode;
@@ -371,7 +375,7 @@ xfs_inode_to_log_dinode(
if (from->di_version == 3) {
to->di_changecount = inode_peek_iversion(inode);
- to->di_crtime = xfs_inode_to_log_dinode_ts(from->di_crtime);
+ to->di_crtime = xfs_inode_to_log_dinode_ts(ip, from->di_crtime);
to->di_flags2 = from->di_flags2;
to->di_cowextsize = from->di_cowextsize;
to->di_ino = ip->i_ino;
diff --git a/fs/xfs/xfs_ioctl.c b/fs/xfs/xfs_ioctl.c
index 423f2a75b82b..fc4291f757a2 100644
--- a/fs/xfs/xfs_ioctl.c
+++ b/fs/xfs/xfs_ioctl.c
@@ -976,7 +976,8 @@ xfs_flags2diflags2(
unsigned int xflags)
{
uint64_t di_flags2 =
- (ip->i_d.di_flags2 & XFS_DIFLAG2_REFLINK);
+ (ip->i_d.di_flags2 & (XFS_DIFLAG2_REFLINK |
+ XFS_DIFLAG2_BIGTIME));
if (xflags & FS_XFLAG_DAX)
di_flags2 |= XFS_DIFLAG2_DAX;
diff --git a/fs/xfs/xfs_ondisk.h b/fs/xfs/xfs_ondisk.h
index 6934cd75068a..2cf41c5749cd 100644
--- a/fs/xfs/xfs_ondisk.h
+++ b/fs/xfs/xfs_ondisk.h
@@ -27,6 +27,10 @@
"XFS: offsetof(" #structname ", " #member ") is wrong, " \
"expected " #off)
+#define XFS_CHECK_VALUE(value, expected) \
+ BUILD_BUG_ON_MSG((value) != (expected), \
+ "XFS: value of " #value " is wrong, expected " #expected)
+
static inline void __init
xfs_check_ondisk_structs(void)
{
@@ -139,6 +143,14 @@ xfs_check_ondisk_structs(void)
XFS_CHECK_STRUCT_SIZE(struct xfs_inode_log_format, 56);
XFS_CHECK_STRUCT_SIZE(struct xfs_qoff_logformat, 20);
XFS_CHECK_STRUCT_SIZE(struct xfs_trans_header, 16);
+ /*
+ * Make sure the incore inode timestamp range corresponds to hand
+ * converted values based on the ondisk format specification.
+ */
+ XFS_CHECK_VALUE(XFS_BIGTIME_TIME_MIN - XFS_BIGTIME_EPOCH_OFFSET,
+ XFS_LEGACY_TIME_MIN);
+ XFS_CHECK_VALUE(XFS_BIGTIME_TIME_MAX - XFS_BIGTIME_EPOCH_OFFSET,
+ 16299260424LL);
}
#endif /* __XFS_ONDISK_H */
diff --git a/fs/xfs/xfs_super.c b/fs/xfs/xfs_super.c
index 08acfc897b82..76632860e32a 100644
--- a/fs/xfs/xfs_super.c
+++ b/fs/xfs/xfs_super.c
@@ -1679,6 +1679,10 @@ xfs_fs_fill_super(
if (XFS_SB_VERSION_NUM(&mp->m_sb) == XFS_SB_VERSION_5)
sb->s_flags |= MS_I_VERSION;
+ if (xfs_sb_version_hasbigtime(&mp->m_sb))
+ xfs_warn(mp,
+ "EXPERIMENTAL big timestamp feature in use. Use at your own risk!");
+
if (mp->m_flags & XFS_MOUNT_DAX) {
bool rtdev_is_dax = false, datadev_is_dax;
diff --git a/fs/xfs/xfs_trans_inode.c b/fs/xfs/xfs_trans_inode.c
index 470876764edd..eabb358e131b 100644
--- a/fs/xfs/xfs_trans_inode.c
+++ b/fs/xfs/xfs_trans_inode.c
@@ -103,6 +103,17 @@ xfs_trans_log_inode(
ASSERT(ip->i_itemp != NULL);
ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
+ /*
+ * If we're updating the inode core or the timestamps and it's possible
+ * to upgrade this inode to bigtime format, do so now.
+ */
+ if ((flags & (XFS_ILOG_CORE | XFS_ILOG_TIMESTAMP)) &&
+ xfs_sb_version_hasbigtime(&ip->i_mount->m_sb) &&
+ !xfs_inode_has_bigtime(ip)) {
+ ip->i_d.di_flags2 |= XFS_DIFLAG2_BIGTIME;
+ flags |= XFS_ILOG_CORE;
+ }
+
/*
* Record the specific change for fdatasync optimisation. This
* allows fdatasync to skip log forces for inodes that are only
--
2.35.3