Merge branch 'vfs_timespec64' of https://github.com/deepa-hub/vfs into vfs-timespec64

Pull the timespec64 conversion from Deepa Dinamani:
 "The series aims to switch vfs timestamps to use
  struct timespec64. Currently vfs uses struct timespec,
  which is not y2038 safe.

  The flag patch applies cleanly. I've not seen the timestamps
  update logic change often. The series applies cleanly on 4.17-rc6
  and linux-next tip (top commit: next-20180517).

  I'm not sure how to merge this kind of a series with a flag patch.
  We are targeting 4.18 for this.
  Let me know if you have other suggestions.

  The series involves the following:
  1. Add vfs helper functions for supporting struct timepec64 timestamps.
  2. Cast prints of vfs timestamps to avoid warnings after the switch.
  3. Simplify code using vfs timestamps so that the actual
     replacement becomes easy.
  4. Convert vfs timestamps to use struct timespec64 using a script.
     This is a flag day patch.

  I've tried to keep the conversions with the script simple, to
  aid in the reviews. I've kept all the internal filesystem data
  structures and function signatures the same.

  Next steps:
  1. Convert APIs that can handle timespec64, instead of converting
     timestamps at the boundaries.
  2. Update internal data structures to avoid timestamp conversions."

I've pulled it into a branch based on top of the NFS changes that
are now in mainline, so I could resolve the non-obvious conflict
between the two while merging.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>

3 files changed, 18 insertions, 16 deletions

diff --git a/include/linux/fs.h b/include/linux/fs.h
index 760d8da1b6c7..f15329aa9cad 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -206,9 +206,9 @@ struct iattr {
 	kuid_t		ia_uid;
 	kgid_t		ia_gid;
 	loff_t		ia_size;
-	struct timespec	ia_atime;
-	struct timespec	ia_mtime;
-	struct timespec	ia_ctime;
+	struct timespec64 ia_atime;
+	struct timespec64 ia_mtime;
+	struct timespec64 ia_ctime;
 
 	/*
 	 * Not an attribute, but an auxiliary info for filesystems wanting to
@@ -602,9 +602,9 @@ struct inode {
 	};
 	dev_t			i_rdev;
 	loff_t			i_size;
-	struct timespec		i_atime;
-	struct timespec		i_mtime;
-	struct timespec		i_ctime;
+	struct timespec64	i_atime;
+	struct timespec64	i_mtime;
+	struct timespec64	i_ctime;
 	spinlock_t		i_lock;	/* i_blocks, i_bytes, maybe i_size */
 	unsigned short          i_bytes;
 	unsigned int		i_blkbits;
@@ -1091,7 +1091,7 @@ extern int vfs_lock_file(struct file *, unsigned int, struct file_lock *, struct
 extern int vfs_cancel_lock(struct file *filp, struct file_lock *fl);
 extern int locks_lock_inode_wait(struct inode *inode, struct file_lock *fl);
 extern int __break_lease(struct inode *inode, unsigned int flags, unsigned int type);
-extern void lease_get_mtime(struct inode *, struct timespec *time);
+extern void lease_get_mtime(struct inode *, struct timespec64 *time);
 extern int generic_setlease(struct file *, long, struct file_lock **, void **priv);
 extern int vfs_setlease(struct file *, long, struct file_lock **, void **);
 extern int lease_modify(struct file_lock *, int, struct list_head *);
@@ -1206,7 +1206,8 @@ static inline int __break_lease(struct inode *inode, unsigned int mode, unsigned
 	return 0;
 }
 
-static inline void lease_get_mtime(struct inode *inode, struct timespec *time)
+static inline void lease_get_mtime(struct inode *inode,
+				   struct timespec64 *time)
 {
 	return;
 }
@@ -1476,7 +1477,8 @@ static inline void i_gid_write(struct inode *inode, gid_t gid)
 	inode->i_gid = make_kgid(inode->i_sb->s_user_ns, gid);
 }
 
-extern struct timespec current_time(struct inode *inode);
+extern struct timespec64 timespec64_trunc(struct timespec64 t, unsigned gran);
+extern struct timespec64 current_time(struct inode *inode);
 
 /*
  * Snapshotting support.
@@ -1764,7 +1766,7 @@ struct inode_operations {
 	ssize_t (*listxattr) (struct dentry *, char *, size_t);
 	int (*fiemap)(struct inode *, struct fiemap_extent_info *, u64 start,
 		      u64 len);
-	int (*update_time)(struct inode *, struct timespec *, int);
+	int (*update_time)(struct inode *, struct timespec64 *, int);
 	int (*atomic_open)(struct inode *, struct dentry *,
 			   struct file *, unsigned open_flag,
 			   umode_t create_mode, int *opened);
@@ -2198,7 +2200,7 @@ extern int current_umask(void);
 
 extern void ihold(struct inode * inode);
 extern void iput(struct inode *);
-extern int generic_update_time(struct inode *, struct timespec *, int);
+extern int generic_update_time(struct inode *, struct timespec64 *, int);
 
 /* /sys/fs */
 extern struct kobject *fs_kobj;
diff --git a/include/linux/pstore.h b/include/linux/pstore.h
index 61f806a7fe29..a15bc4d48752 100644
--- a/include/linux/pstore.h
+++ b/include/linux/pstore.h
@@ -71,7 +71,7 @@ struct pstore_record {
 	struct pstore_info	*psi;
 	enum pstore_type_id	type;
 	u64			id;
-	struct timespec		time;
+	struct timespec64	time;
 	char			*buf;
 	ssize_t			size;
 	ssize_t			ecc_notice_size;
diff --git a/include/linux/stat.h b/include/linux/stat.h
index 22484e44544d..765573dc17d6 100644
--- a/include/linux/stat.h
+++ b/include/linux/stat.h
@@ -41,10 +41,10 @@ struct kstat {
 	kuid_t		uid;
 	kgid_t		gid;
 	loff_t		size;
-	struct timespec	atime;
-	struct timespec	mtime;
-	struct timespec	ctime;
-	struct timespec	btime;			/* File creation time */
+	struct timespec64 atime;
+	struct timespec64 mtime;
+	struct timespec64 ctime;
+	struct timespec64 btime;			/* File creation time */
 	u64		blocks;
 };