From: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
Replace this struct with an encoded __be64 value and add conversion
helpers to deal with the change.
Signed-off-by: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
---
fs/xfs/libxfs/xfs_format.h | 8 ++---
fs/xfs/libxfs/xfs_inode_buf.c | 62 +++++++++++++++++++++++++++++----------
fs/xfs/libxfs/xfs_inode_buf.h | 2 +
fs/xfs/scrub/inode.c | 25 +++++++++++-----
fs/xfs/xfs_inode_item_recover.c | 26 +++++++++++-----
fs/xfs/xfs_ondisk.h | 2 +
6 files changed, 87 insertions(+), 38 deletions(-)
diff --git a/fs/xfs/libxfs/xfs_format.h b/fs/xfs/libxfs/xfs_format.h
index 4b68a473b090..96734ba9aa5f 100644
--- a/fs/xfs/libxfs/xfs_format.h
+++ b/fs/xfs/libxfs/xfs_format.h
@@ -856,12 +856,10 @@ struct xfs_agfl {
* seconds and nanoseconds; time zero is the Unix epoch, Jan 1 00:00:00 UTC
* 1970, which means that the timestamp epoch is the same as the Unix epoch.
* Therefore, the ondisk min and max defined here can be used directly to
- * constrain the incore timestamps on a Unix system.
+ * constrain the incore timestamps on a Unix system. Note that we actually
+ * encode a __be64 value on disk.
*/
-typedef struct xfs_timestamp {
- __be32 t_sec; /* timestamp seconds */
- __be32 t_nsec; /* timestamp nanoseconds */
-} xfs_timestamp_t;
+typedef __be64 xfs_timestamp_t;
/*
* Smallest possible ondisk seconds value with traditional timestamps. This
diff --git a/fs/xfs/libxfs/xfs_inode_buf.c b/fs/xfs/libxfs/xfs_inode_buf.c
index fa83591ca89b..1e65e28a9386 100644
--- a/fs/xfs/libxfs/xfs_inode_buf.c
+++ b/fs/xfs/libxfs/xfs_inode_buf.c
@@ -157,6 +157,26 @@ xfs_imap_to_bp(
return 0;
}
+/*
+ * Convert an ondisk timestamp to an incore timestamp.
+ *
+ * For traditional timestamps, the ondisk format specifies that the seconds
+ * are stored in the first four bytes and the nanoseconds in the second four.
+ * Let the be64 conversion rotate the seconds field into the upper 32-bits,
+ * then shift and mask to extract the two values.
+ */
+struct timespec64
+xfs_inode_from_disk_ts(
+ const xfs_timestamp_t ts)
+{
+ struct timespec64 tv;
+ uint64_t t = be64_to_cpu(ts);
+
+ tv.tv_sec = (int64_t)t >> 32;
+ tv.tv_nsec = (int32_t)(t & 0xffffffff);
+ return tv;
+}
+
int
xfs_inode_from_disk(
struct xfs_inode *ip,
@@ -211,12 +231,9 @@ xfs_inode_from_disk(
* a time before epoch is converted to a time long after epoch
* on 64 bit systems.
*/
- inode->i_atime.tv_sec = (int)be32_to_cpu(from->di_atime.t_sec);
- inode->i_atime.tv_nsec = (int)be32_to_cpu(from->di_atime.t_nsec);
- inode->i_mtime.tv_sec = (int)be32_to_cpu(from->di_mtime.t_sec);
- inode->i_mtime.tv_nsec = (int)be32_to_cpu(from->di_mtime.t_nsec);
- inode->i_ctime.tv_sec = (int)be32_to_cpu(from->di_ctime.t_sec);
- inode->i_ctime.tv_nsec = (int)be32_to_cpu(from->di_ctime.t_nsec);
+ 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);
to->di_size = be64_to_cpu(from->di_size);
to->di_nblocks = be64_to_cpu(from->di_nblocks);
@@ -229,8 +246,7 @@ xfs_inode_from_disk(
if (xfs_sb_version_has_v3inode(&ip->i_mount->m_sb)) {
inode_set_iversion_queried(inode,
be64_to_cpu(from->di_changecount));
- to->di_crtime.tv_sec = be32_to_cpu(from->di_crtime.t_sec);
- to->di_crtime.tv_nsec = be32_to_cpu(from->di_crtime.t_nsec);
+ to->di_crtime = xfs_inode_from_disk_ts(from->di_crtime);
to->di_flags2 = be64_to_cpu(from->di_flags2);
to->di_cowextsize = be32_to_cpu(from->di_cowextsize);
}
@@ -252,6 +268,24 @@ xfs_inode_from_disk(
return error;
}
+/*
+ * Convert an incore timestamp to an ondisk timestamp.
+ *
+ * For traditional timestamps, the ondisk format specifies that the seconds
+ * are stored in the first four bytes and the nanoseconds in the second four.
+ * Shift the seconds into the upper 32-bits so that the be64 conversion will
+ * take care of rotating the bytes for us.
+ */
+static inline xfs_timestamp_t
+xfs_inode_to_disk_ts(
+ const struct timespec64 tv)
+{
+ uint64_t t;
+
+ t = ((int64_t)tv.tv_sec << 32) | (tv.tv_nsec & 0xffffffff);
+ return cpu_to_be64(t);
+}
+
void
xfs_inode_to_disk(
struct xfs_inode *ip,
@@ -271,12 +305,9 @@ xfs_inode_to_disk(
to->di_projid_hi = cpu_to_be16(from->di_projid >> 16);
memset(to->di_pad, 0, sizeof(to->di_pad));
- to->di_atime.t_sec = cpu_to_be32(inode->i_atime.tv_sec);
- to->di_atime.t_nsec = cpu_to_be32(inode->i_atime.tv_nsec);
- to->di_mtime.t_sec = cpu_to_be32(inode->i_mtime.tv_sec);
- to->di_mtime.t_nsec = cpu_to_be32(inode->i_mtime.tv_nsec);
- to->di_ctime.t_sec = cpu_to_be32(inode->i_ctime.tv_sec);
- to->di_ctime.t_nsec = cpu_to_be32(inode->i_ctime.tv_nsec);
+ 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_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);
@@ -295,8 +326,7 @@ xfs_inode_to_disk(
if (xfs_sb_version_has_v3inode(&ip->i_mount->m_sb)) {
to->di_version = 3;
to->di_changecount = cpu_to_be64(inode_peek_iversion(inode));
- to->di_crtime.t_sec = cpu_to_be32(from->di_crtime.tv_sec);
- to->di_crtime.t_nsec = cpu_to_be32(from->di_crtime.tv_nsec);
+ to->di_crtime = xfs_inode_to_disk_ts(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);
diff --git a/fs/xfs/libxfs/xfs_inode_buf.h b/fs/xfs/libxfs/xfs_inode_buf.h
index 89f7bea8efd6..3060ecd24a2e 100644
--- a/fs/xfs/libxfs/xfs_inode_buf.h
+++ b/fs/xfs/libxfs/xfs_inode_buf.h
@@ -58,4 +58,6 @@ xfs_failaddr_t xfs_inode_validate_cowextsize(struct xfs_mount *mp,
uint32_t cowextsize, uint16_t mode, uint16_t flags,
uint64_t flags2);
+struct timespec64 xfs_inode_from_disk_ts(const xfs_timestamp_t ts);
+
#endif /* __XFS_INODE_BUF_H__ */
diff --git a/fs/xfs/scrub/inode.c b/fs/xfs/scrub/inode.c
index 6d483ab29e63..eb1cc013d4ca 100644
--- a/fs/xfs/scrub/inode.c
+++ b/fs/xfs/scrub/inode.c
@@ -195,6 +195,19 @@ xchk_inode_flags2(
xchk_ino_set_corrupt(sc, ino);
}
+static inline void
+xchk_dinode_nsec(
+ struct xfs_scrub *sc,
+ xfs_ino_t ino,
+ const xfs_timestamp_t ts)
+{
+ struct timespec64 tv;
+
+ tv = xfs_inode_from_disk_ts(ts);
+ if (tv.tv_nsec < 0 || tv.tv_nsec >= NSEC_PER_SEC)
+ xchk_ino_set_corrupt(sc, ino);
+}
+
/* Scrub all the ondisk inode fields. */
STATIC void
xchk_dinode(
@@ -293,12 +306,9 @@ xchk_dinode(
}
/* di_[amc]time.nsec */
- if (be32_to_cpu(dip->di_atime.t_nsec) >= NSEC_PER_SEC)
- xchk_ino_set_corrupt(sc, ino);
- if (be32_to_cpu(dip->di_mtime.t_nsec) >= NSEC_PER_SEC)
- xchk_ino_set_corrupt(sc, ino);
- if (be32_to_cpu(dip->di_ctime.t_nsec) >= NSEC_PER_SEC)
- xchk_ino_set_corrupt(sc, ino);
+ xchk_dinode_nsec(sc, ino, dip->di_atime);
+ xchk_dinode_nsec(sc, ino, dip->di_mtime);
+ xchk_dinode_nsec(sc, ino, dip->di_ctime);
/*
* di_size. xfs_dinode_verify checks for things that screw up
@@ -403,8 +413,7 @@ xchk_dinode(
}
if (dip->di_version >= 3) {
- if (be32_to_cpu(dip->di_crtime.t_nsec) >= NSEC_PER_SEC)
- xchk_ino_set_corrupt(sc, ino);
+ xchk_dinode_nsec(sc, ino, dip->di_crtime);
xchk_inode_flags2(sc, dip, ino, mode, flags, flags2);
xchk_inode_cowextsize(sc, dip, ino, mode, flags,
flags2);
diff --git a/fs/xfs/xfs_inode_item_recover.c b/fs/xfs/xfs_inode_item_recover.c
index 1e417ace2912..e7c6f2b95e17 100644
--- a/fs/xfs/xfs_inode_item_recover.c
+++ b/fs/xfs/xfs_inode_item_recover.c
@@ -115,6 +115,20 @@ xfs_recover_inode_owner_change(
return error;
}
+/*
+ * Convert a log timestamp to an ondisk timestamp. See notes about the ondisk
+ * encoding in the comments for xfs_inode_to_disk_ts.
+ */
+static inline xfs_timestamp_t
+xfs_log_dinode_to_disk_ts(
+ const xfs_ictimestamp_t its)
+{
+ uint64_t t;
+
+ t = ((int64_t)its.t_sec << 32) | (its.t_nsec & 0xffffffff);
+ return cpu_to_be64(t);
+}
+
STATIC void
xfs_log_dinode_to_disk(
struct xfs_log_dinode *from,
@@ -132,12 +146,9 @@ 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.t_sec = cpu_to_be32(from->di_atime.t_sec);
- to->di_atime.t_nsec = cpu_to_be32(from->di_atime.t_nsec);
- to->di_mtime.t_sec = cpu_to_be32(from->di_mtime.t_sec);
- to->di_mtime.t_nsec = cpu_to_be32(from->di_mtime.t_nsec);
- to->di_ctime.t_sec = cpu_to_be32(from->di_ctime.t_sec);
- to->di_ctime.t_nsec = cpu_to_be32(from->di_ctime.t_nsec);
+ 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_size = cpu_to_be64(from->di_size);
to->di_nblocks = cpu_to_be64(from->di_nblocks);
@@ -153,8 +164,7 @@ xfs_log_dinode_to_disk(
if (from->di_version == 3) {
to->di_changecount = cpu_to_be64(from->di_changecount);
- to->di_crtime.t_sec = cpu_to_be32(from->di_crtime.t_sec);
- to->di_crtime.t_nsec = cpu_to_be32(from->di_crtime.t_nsec);
+ to->di_crtime = xfs_log_dinode_to_disk_ts(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);
diff --git a/fs/xfs/xfs_ondisk.h b/fs/xfs/xfs_ondisk.h
index acb9b737fe6b..2f11a6f9e005 100644
--- a/fs/xfs/xfs_ondisk.h
+++ b/fs/xfs/xfs_ondisk.h
@@ -41,7 +41,7 @@ xfs_check_ondisk_structs(void)
XFS_CHECK_STRUCT_SIZE(struct xfs_refcount_rec, 12);
XFS_CHECK_STRUCT_SIZE(struct xfs_rmap_key, 20);
XFS_CHECK_STRUCT_SIZE(struct xfs_rmap_rec, 24);
- XFS_CHECK_STRUCT_SIZE(struct xfs_timestamp, 8);
+ XFS_CHECK_STRUCT_SIZE(xfs_timestamp_t, 8);
XFS_CHECK_STRUCT_SIZE(xfs_alloc_key_t, 8);
XFS_CHECK_STRUCT_SIZE(xfs_alloc_ptr_t, 4);
XFS_CHECK_STRUCT_SIZE(xfs_alloc_rec_t, 8);
