diff mbox series

[07/11] xfs: convert struct xfs_timestamp to union

Message ID 159797593518.965217.18264791906308377426.stgit@magnolia (mailing list archive)
State Deferred, 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>

Convert the xfs_timestamp struct to a union so that we can overload it
in the next patch.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Amir Goldstein <amir73il@gmail.com>
---
 fs/xfs/libxfs/xfs_format.h     |   16 +++++++++-------
 fs/xfs/libxfs/xfs_inode_buf.c  |    4 ++--
 fs/xfs/libxfs/xfs_inode_buf.h  |    4 ++--
 fs/xfs/libxfs/xfs_log_format.h |   16 +++++++++-------
 fs/xfs/scrub/inode.c           |    2 +-
 fs/xfs/xfs_inode_item.c        |    6 +++---
 fs/xfs/xfs_ondisk.h            |    4 ++--
 7 files changed, 28 insertions(+), 24 deletions(-)

Comments

Christoph Hellwig Aug. 22, 2020, 7:18 a.m. UTC | #1 
On Thu, Aug 20, 2020 at 07:12:15PM -0700, Darrick J. Wong wrote:
> From: Darrick J. Wong <darrick.wong@oracle.com>
> 
> Convert the xfs_timestamp struct to a union so that we can overload it
> in the next patch.
> 
> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
> Reviewed-by: Amir Goldstein <amir73il@gmail.com>
> ---
>  fs/xfs/libxfs/xfs_format.h     |   16 +++++++++-------
>  fs/xfs/libxfs/xfs_inode_buf.c  |    4 ++--
>  fs/xfs/libxfs/xfs_inode_buf.h  |    4 ++--
>  fs/xfs/libxfs/xfs_log_format.h |   16 +++++++++-------
>  fs/xfs/scrub/inode.c           |    2 +-
>  fs/xfs/xfs_inode_item.c        |    6 +++---
>  fs/xfs/xfs_ondisk.h            |    4 ++--
>  7 files changed, 28 insertions(+), 24 deletions(-)
> 
> 
> diff --git a/fs/xfs/libxfs/xfs_format.h b/fs/xfs/libxfs/xfs_format.h
> index 1f3a2be6c396..772113db41aa 100644
> --- a/fs/xfs/libxfs/xfs_format.h
> +++ b/fs/xfs/libxfs/xfs_format.h
> @@ -856,9 +856,11 @@ struct xfs_agfl {
>   * Inode timestamps consist of signed 32-bit counters for seconds and
>   * nanoseconds; time zero is the Unix epoch, Jan  1 00:00:00 UTC 1970.
>   */
> -struct xfs_timestamp {
> -	__be32		t_sec;		/* timestamp seconds */
> -	__be32		t_nsec;		/* timestamp nanoseconds */
> +union xfs_timestamp {
> +	struct {
> +		__be32		t_sec;		/* timestamp seconds */
> +		__be32		t_nsec;		/* timestamp nanoseconds */
> +	};
>  };

Wouldn't it make sense to merge the typedef removal patch into this
one to avoid touching all the users twice?
Darrick J. Wong Aug. 24, 2020, 2:35 a.m. UTC | #2 
On Sat, Aug 22, 2020 at 08:18:30AM +0100, Christoph Hellwig wrote:
> On Thu, Aug 20, 2020 at 07:12:15PM -0700, Darrick J. Wong wrote:
> > From: Darrick J. Wong <darrick.wong@oracle.com>
> > 
> > Convert the xfs_timestamp struct to a union so that we can overload it
> > in the next patch.
> > 
> > Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
> > Reviewed-by: Amir Goldstein <amir73il@gmail.com>
> > ---
> >  fs/xfs/libxfs/xfs_format.h     |   16 +++++++++-------
> >  fs/xfs/libxfs/xfs_inode_buf.c  |    4 ++--
> >  fs/xfs/libxfs/xfs_inode_buf.h  |    4 ++--
> >  fs/xfs/libxfs/xfs_log_format.h |   16 +++++++++-------
> >  fs/xfs/scrub/inode.c           |    2 +-
> >  fs/xfs/xfs_inode_item.c        |    6 +++---
> >  fs/xfs/xfs_ondisk.h            |    4 ++--
> >  7 files changed, 28 insertions(+), 24 deletions(-)
> > 
> > 
> > diff --git a/fs/xfs/libxfs/xfs_format.h b/fs/xfs/libxfs/xfs_format.h
> > index 1f3a2be6c396..772113db41aa 100644
> > --- a/fs/xfs/libxfs/xfs_format.h
> > +++ b/fs/xfs/libxfs/xfs_format.h
> > @@ -856,9 +856,11 @@ struct xfs_agfl {
> >   * Inode timestamps consist of signed 32-bit counters for seconds and
> >   * nanoseconds; time zero is the Unix epoch, Jan  1 00:00:00 UTC 1970.
> >   */
> > -struct xfs_timestamp {
> > -	__be32		t_sec;		/* timestamp seconds */
> > -	__be32		t_nsec;		/* timestamp nanoseconds */
> > +union xfs_timestamp {
> > +	struct {
> > +		__be32		t_sec;		/* timestamp seconds */
> > +		__be32		t_nsec;		/* timestamp nanoseconds */
> > +	};
> >  };
> 
> Wouldn't it make sense to merge the typedef removal patch into this
> one to avoid touching all the users twice?

Will fix.  I wasn't sure if people would howl about making both changes
at once, and it's easier to combine two patches. ;)

--D
diff mbox series

Patch

diff --git a/fs/xfs/libxfs/xfs_format.h b/fs/xfs/libxfs/xfs_format.h
index 1f3a2be6c396..772113db41aa 100644
--- a/fs/xfs/libxfs/xfs_format.h
+++ b/fs/xfs/libxfs/xfs_format.h
@@ -856,9 +856,11 @@  struct xfs_agfl {
  * Inode timestamps consist of signed 32-bit counters for seconds and
  * nanoseconds; time zero is the Unix epoch, Jan  1 00:00:00 UTC 1970.
  */
-struct xfs_timestamp {
-	__be32		t_sec;		/* timestamp seconds */
-	__be32		t_nsec;		/* timestamp nanoseconds */
+union xfs_timestamp {
+	struct {
+		__be32		t_sec;		/* timestamp seconds */
+		__be32		t_nsec;		/* timestamp nanoseconds */
+	};
 };
 
 /*
@@ -904,9 +906,9 @@  typedef struct xfs_dinode {
 	__be16		di_projid_hi;	/* higher part owner's project id */
 	__u8		di_pad[6];	/* unused, zeroed space */
 	__be16		di_flushiter;	/* incremented on flush */
-	struct xfs_timestamp di_atime;	/* time last accessed */
-	struct xfs_timestamp di_mtime;	/* time last modified */
-	struct xfs_timestamp di_ctime;	/* time created/inode modified */
+	union xfs_timestamp di_atime;	/* time last accessed */
+	union xfs_timestamp di_mtime;	/* time last modified */
+	union xfs_timestamp di_ctime;	/* time created/inode modified */
 	__be64		di_size;	/* number of bytes in file */
 	__be64		di_nblocks;	/* # of direct & btree blocks used */
 	__be32		di_extsize;	/* basic/minimum extent size for file */
@@ -931,7 +933,7 @@  typedef struct xfs_dinode {
 	__u8		di_pad2[12];	/* more padding for future expansion */
 
 	/* fields only written to during inode creation */
-	struct xfs_timestamp di_crtime;	/* time created */
+	union xfs_timestamp di_crtime;	/* time created */
 	__be64		di_ino;		/* inode number */
 	uuid_t		di_uuid;	/* UUID of the filesystem */
 
diff --git a/fs/xfs/libxfs/xfs_inode_buf.c b/fs/xfs/libxfs/xfs_inode_buf.c
index 4930eabed6d8..cc1316a5fe0c 100644
--- a/fs/xfs/libxfs/xfs_inode_buf.c
+++ b/fs/xfs/libxfs/xfs_inode_buf.c
@@ -160,7 +160,7 @@  xfs_imap_to_bp(
 void
 xfs_inode_from_disk_timestamp(
 	struct timespec64		*tv,
-	const struct xfs_timestamp	*ts)
+	const union xfs_timestamp	*ts)
 {
 	tv->tv_sec = (int)be32_to_cpu(ts->t_sec);
 	tv->tv_nsec = (int)be32_to_cpu(ts->t_nsec);
@@ -259,7 +259,7 @@  xfs_inode_from_disk(
 
 void
 xfs_inode_to_disk_timestamp(
-	struct xfs_timestamp		*ts,
+	union xfs_timestamp		*ts,
 	const struct timespec64		*tv)
 {
 	ts->t_sec = cpu_to_be32(tv->tv_sec);
diff --git a/fs/xfs/libxfs/xfs_inode_buf.h b/fs/xfs/libxfs/xfs_inode_buf.h
index 9c63f3f932d7..f6160033fcbd 100644
--- a/fs/xfs/libxfs/xfs_inode_buf.h
+++ b/fs/xfs/libxfs/xfs_inode_buf.h
@@ -59,8 +59,8 @@  xfs_failaddr_t xfs_inode_validate_cowextsize(struct xfs_mount *mp,
 		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 union xfs_timestamp *ts);
+void xfs_inode_to_disk_timestamp(union xfs_timestamp *ts,
 		const struct timespec64 *tv);
 
 #endif	/* __XFS_INODE_BUF_H__ */
diff --git a/fs/xfs/libxfs/xfs_log_format.h b/fs/xfs/libxfs/xfs_log_format.h
index f2fac9bea66d..17c83d29998c 100644
--- a/fs/xfs/libxfs/xfs_log_format.h
+++ b/fs/xfs/libxfs/xfs_log_format.h
@@ -368,9 +368,11 @@  static inline int xfs_ilog_fdata(int w)
  * directly mirrors the xfs_dinode structure as it must contain all the same
  * information.
  */
-struct xfs_ictimestamp {
-	int32_t		t_sec;		/* timestamp seconds */
-	int32_t		t_nsec;		/* timestamp nanoseconds */
+union xfs_ictimestamp {
+	struct {
+		int32_t		t_sec;		/* timestamp seconds */
+		int32_t		t_nsec;		/* timestamp nanoseconds */
+	};
 };
 
 /*
@@ -390,9 +392,9 @@  struct xfs_log_dinode {
 	uint16_t	di_projid_hi;	/* higher part of owner's project id */
 	uint8_t		di_pad[6];	/* unused, zeroed space */
 	uint16_t	di_flushiter;	/* incremented on flush */
-	struct xfs_ictimestamp di_atime;	/* time last accessed */
-	struct xfs_ictimestamp di_mtime;	/* time last modified */
-	struct xfs_ictimestamp di_ctime;	/* time created/inode modified */
+	union xfs_ictimestamp di_atime;	/* time last accessed */
+	union xfs_ictimestamp di_mtime;	/* time last modified */
+	union xfs_ictimestamp di_ctime;	/* time created/inode modified */
 	xfs_fsize_t	di_size;	/* number of bytes in file */
 	xfs_rfsblock_t	di_nblocks;	/* # of direct & btree blocks used */
 	xfs_extlen_t	di_extsize;	/* basic/minimum extent size for file */
@@ -417,7 +419,7 @@  struct xfs_log_dinode {
 	uint8_t		di_pad2[12];	/* more padding for future expansion */
 
 	/* fields only written to during inode creation */
-	struct xfs_ictimestamp di_crtime;	/* time created */
+	union xfs_ictimestamp di_crtime;	/* time created */
 	xfs_ino_t	di_ino;		/* inode number */
 	uuid_t		di_uuid;	/* UUID of the filesystem */
 
diff --git a/fs/xfs/scrub/inode.c b/fs/xfs/scrub/inode.c
index ccb5c217c0ee..9f036053fdb7 100644
--- a/fs/xfs/scrub/inode.c
+++ b/fs/xfs/scrub/inode.c
@@ -199,7 +199,7 @@  static inline void
 xchk_dinode_nsec(
 	struct xfs_scrub		*sc,
 	xfs_ino_t			ino,
-	const struct xfs_timestamp	*ts)
+	const union xfs_timestamp	*ts)
 {
 	struct timespec64		tv;
 
diff --git a/fs/xfs/xfs_inode_item.c b/fs/xfs/xfs_inode_item.c
index dac0ab59e88f..cec6d4d82bc4 100644
--- a/fs/xfs/xfs_inode_item.c
+++ b/fs/xfs/xfs_inode_item.c
@@ -298,8 +298,8 @@  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)
+	union xfs_timestamp		*ts,
+	const union xfs_ictimestamp	*its)
 {
 	ts->t_sec = cpu_to_be32(its->t_sec);
 	ts->t_nsec = cpu_to_be32(its->t_nsec);
@@ -356,7 +356,7 @@  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,
+	union xfs_ictimestamp		*its,
 	const struct timespec64		*ts)
 {
 	its->t_sec = ts->tv_sec;
diff --git a/fs/xfs/xfs_ondisk.h b/fs/xfs/xfs_ondisk.h
index 498e9063c605..7158a8de719f 100644
--- a/fs/xfs/xfs_ondisk.h
+++ b/fs/xfs/xfs_ondisk.h
@@ -57,7 +57,7 @@  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(union xfs_timestamp,		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);
@@ -137,7 +137,7 @@  xfs_check_ondisk_structs(void)
 	XFS_CHECK_STRUCT_SIZE(struct xfs_extent_64,		16);
 	XFS_CHECK_STRUCT_SIZE(struct xfs_log_dinode,		176);
 	XFS_CHECK_STRUCT_SIZE(struct xfs_icreate_log,		28);
-	XFS_CHECK_STRUCT_SIZE(struct xfs_ictimestamp,		8);
+	XFS_CHECK_STRUCT_SIZE(union xfs_ictimestamp,		8);
 	XFS_CHECK_STRUCT_SIZE(struct xfs_inode_log_format_32,	52);
 	XFS_CHECK_STRUCT_SIZE(struct xfs_inode_log_format,	56);
 	XFS_CHECK_STRUCT_SIZE(struct xfs_qoff_logformat,	20);