diff mbox series

[06/11] xfs: refactor inode timestamp coding

Message ID 159797592873.965217.7436192080471557112.stgit@magnolia (mailing list archive)
State New, archived
Headers show
Series xfs: widen timestamps to deal with y2038 | expand

Commit Message

Darrick J. Wong Aug. 21, 2020, 2:12 a.m. UTC 
From: Darrick J. Wong <darrick.wong@oracle.com>

Refactor inode timestamp encoding and decoding into helper functions so
that we can add extra behaviors in subsequent patches.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Amir Goldstein <amir73il@gmail.com>
---
 fs/xfs/libxfs/xfs_inode_buf.c |   42 ++++++++++++++++++++++++---------------
 fs/xfs/libxfs/xfs_inode_buf.h |    5 +++++
 fs/xfs/scrub/inode.c          |   25 ++++++++++++++++-------
 fs/xfs/xfs_inode_item.c       |   44 ++++++++++++++++++++++++++---------------
 4 files changed, 76 insertions(+), 40 deletions(-)

Comments

Christoph Hellwig Aug. 22, 2020, 7:17 a.m. UTC | #1 
On Thu, Aug 20, 2020 at 07:12:08PM -0700, Darrick J. Wong wrote:
> From: Darrick J. Wong <darrick.wong@oracle.com>
> 
> Refactor inode timestamp encoding and decoding into helper functions so
> that we can add extra behaviors in subsequent patches.
> 
> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
> Reviewed-by: Amir Goldstein <amir73il@gmail.com>

Looks good,

Reviewed-by: Christoph Hellwig <hch@lst.de>
Dave Chinner Aug. 24, 2020, 12:10 a.m. UTC | #2 
On Thu, Aug 20, 2020 at 07:12:08PM -0700, Darrick J. Wong wrote:
> From: Darrick J. Wong <darrick.wong@oracle.com>
> 
> Refactor inode timestamp encoding and decoding into helper functions so
> that we can add extra behaviors in subsequent patches.
> 
> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
> Reviewed-by: Amir Goldstein <amir73il@gmail.com>
> ---
>  fs/xfs/libxfs/xfs_inode_buf.c |   42 ++++++++++++++++++++++++---------------
>  fs/xfs/libxfs/xfs_inode_buf.h |    5 +++++
>  fs/xfs/scrub/inode.c          |   25 ++++++++++++++++-------
>  fs/xfs/xfs_inode_item.c       |   44 ++++++++++++++++++++++++++---------------
>  4 files changed, 76 insertions(+), 40 deletions(-)

Reviewed-by: Dave Chinner <dchinner@redhat.com>

Cheers,

Dave.
diff mbox series

Patch

diff --git a/fs/xfs/libxfs/xfs_inode_buf.c b/fs/xfs/libxfs/xfs_inode_buf.c
index fa83591ca89b..4930eabed6d8 100644
--- a/fs/xfs/libxfs/xfs_inode_buf.c
+++ b/fs/xfs/libxfs/xfs_inode_buf.c
@@ -157,6 +157,15 @@  xfs_imap_to_bp(
 	return 0;
 }
 
+void
+xfs_inode_from_disk_timestamp(
+	struct timespec64		*tv,
+	const struct xfs_timestamp	*ts)
+{
+	tv->tv_sec = (int)be32_to_cpu(ts->t_sec);
+	tv->tv_nsec = (int)be32_to_cpu(ts->t_nsec);
+}
+
 int
 xfs_inode_from_disk(
 	struct xfs_inode	*ip,
@@ -211,12 +220,9 @@  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);
+	xfs_inode_from_disk_timestamp(&inode->i_atime, &from->di_atime);
+	xfs_inode_from_disk_timestamp(&inode->i_mtime, &from->di_mtime);
+	xfs_inode_from_disk_timestamp(&inode->i_ctime, &from->di_ctime);
 
 	to->di_size = be64_to_cpu(from->di_size);
 	to->di_nblocks = be64_to_cpu(from->di_nblocks);
@@ -229,8 +235,7 @@  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);
+		xfs_inode_from_disk_timestamp(&to->di_crtime, &from->di_crtime);
 		to->di_flags2 = be64_to_cpu(from->di_flags2);
 		to->di_cowextsize = be32_to_cpu(from->di_cowextsize);
 	}
@@ -252,6 +257,15 @@  xfs_inode_from_disk(
 	return error;
 }
 
+void
+xfs_inode_to_disk_timestamp(
+	struct xfs_timestamp		*ts,
+	const struct timespec64		*tv)
+{
+	ts->t_sec = cpu_to_be32(tv->tv_sec);
+	ts->t_nsec = cpu_to_be32(tv->tv_nsec);
+}
+
 void
 xfs_inode_to_disk(
 	struct xfs_inode	*ip,
@@ -271,12 +285,9 @@  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);
+	xfs_inode_to_disk_timestamp(&to->di_atime, &inode->i_atime);
+	xfs_inode_to_disk_timestamp(&to->di_mtime, &inode->i_mtime);
+	xfs_inode_to_disk_timestamp(&to->di_ctime, &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 +306,7 @@  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);
+		xfs_inode_to_disk_timestamp(&to->di_crtime, &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..9c63f3f932d7 100644
--- a/fs/xfs/libxfs/xfs_inode_buf.h
+++ b/fs/xfs/libxfs/xfs_inode_buf.h
@@ -58,4 +58,9 @@  xfs_failaddr_t xfs_inode_validate_cowextsize(struct xfs_mount *mp,
 		uint32_t cowextsize, uint16_t mode, uint16_t flags,
 		uint64_t flags2);
 
+void xfs_inode_from_disk_timestamp(struct timespec64 *tv,
+		const struct xfs_timestamp *ts);
+void xfs_inode_to_disk_timestamp(struct xfs_timestamp *ts,
+		const struct timespec64 *tv);
+
 #endif	/* __XFS_INODE_BUF_H__ */
diff --git a/fs/xfs/scrub/inode.c b/fs/xfs/scrub/inode.c
index 6d483ab29e63..ccb5c217c0ee 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 struct xfs_timestamp	*ts)
+{
+	struct timespec64		tv;
+
+	xfs_inode_from_disk_timestamp(&tv, 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.c b/fs/xfs/xfs_inode_item.c
index d95a00376fad..dac0ab59e88f 100644
--- a/fs/xfs/xfs_inode_item.c
+++ b/fs/xfs/xfs_inode_item.c
@@ -295,6 +295,16 @@  xfs_inode_item_format_attr_fork(
 	}
 }
 
+/* Write a log_dinode timestamp into an ondisk inode timestamp. */
+static inline void
+xfs_log_dinode_to_disk_ts(
+	struct xfs_timestamp		*ts,
+	const struct xfs_ictimestamp	*its)
+{
+	ts->t_sec = cpu_to_be32(its->t_sec);
+	ts->t_nsec = cpu_to_be32(its->t_nsec);
+}
+
 void
 xfs_log_dinode_to_disk(
 	struct xfs_log_dinode	*from,
@@ -312,12 +322,9 @@  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);
+	xfs_log_dinode_to_disk_ts(&to->di_atime, &from->di_atime);
+	xfs_log_dinode_to_disk_ts(&to->di_mtime, &from->di_mtime);
+	xfs_log_dinode_to_disk_ts(&to->di_ctime, &from->di_ctime);
 
 	to->di_size = cpu_to_be64(from->di_size);
 	to->di_nblocks = cpu_to_be64(from->di_nblocks);
@@ -333,8 +340,7 @@  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);
+		xfs_log_dinode_to_disk_ts(&to->di_crtime, &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);
@@ -347,6 +353,16 @@  xfs_log_dinode_to_disk(
 	}
 }
 
+/* Write an incore inode timestamp into a log_dinode timestamp. */
+static inline void
+xfs_inode_to_log_dinode_ts(
+	struct xfs_ictimestamp		*its,
+	const struct timespec64		*ts)
+{
+	its->t_sec = ts->tv_sec;
+	its->t_nsec = ts->tv_nsec;
+}
+
 static void
 xfs_inode_to_log_dinode(
 	struct xfs_inode	*ip,
@@ -365,12 +381,9 @@  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.t_sec = inode->i_atime.tv_sec;
-	to->di_atime.t_nsec = inode->i_atime.tv_nsec;
-	to->di_mtime.t_sec = inode->i_mtime.tv_sec;
-	to->di_mtime.t_nsec = inode->i_mtime.tv_nsec;
-	to->di_ctime.t_sec = inode->i_ctime.tv_sec;
-	to->di_ctime.t_nsec = inode->i_ctime.tv_nsec;
+	xfs_inode_to_log_dinode_ts(&to->di_atime, &inode->i_atime);
+	xfs_inode_to_log_dinode_ts(&to->di_mtime, &inode->i_mtime);
+	xfs_inode_to_log_dinode_ts(&to->di_ctime, &inode->i_ctime);
 	to->di_nlink = inode->i_nlink;
 	to->di_gen = inode->i_generation;
 	to->di_mode = inode->i_mode;
@@ -392,8 +405,7 @@  xfs_inode_to_log_dinode(
 	if (xfs_sb_version_has_v3inode(&ip->i_mount->m_sb)) {
 		to->di_version = 3;
 		to->di_changecount = inode_peek_iversion(inode);
-		to->di_crtime.t_sec = from->di_crtime.tv_sec;
-		to->di_crtime.t_nsec = from->di_crtime.tv_nsec;
+		xfs_inode_to_log_dinode_ts(&to->di_crtime, &from->di_crtime);
 		to->di_flags2 = from->di_flags2;
 		to->di_cowextsize = from->di_cowextsize;
 		to->di_ino = ip->i_ino;