From 3a3a5fece6f28c14d3d05c74fb7696412e53a067 Mon Sep 17 00:00:00 2001 From: Deepa Dinamani Date: Mon, 22 Feb 2016 07:17:53 -0800 Subject: [PATCH] fs: kernfs: Replace CURRENT_TIME by current_fs_time() This is in preparation for the series that transitions filesystem timestamps to use 64 bit time and hence make them y2038 safe. CURRENT_TIME macro will be deleted before merging the aforementioned series. Use current_fs_time() instead of CURRENT_TIME for inode timestamps. struct kernfs_node is associated with a sysfs file/ directory. Truncate the values to appropriate time granularity when writing to inode timestamps of the files. ktime_get_real_ts() is used to obtain times for struct kernfs_iattrs. Since these times are later assigned to inode times using timespec_truncate() for all filesystem based operations, we can save the supers list traversal time here by using ktime_get_real_ts() directly. Signed-off-by: Deepa Dinamani Signed-off-by: Greg Kroah-Hartman --- fs/kernfs/dir.c | 8 +++++--- fs/kernfs/inode.c | 15 ++++++++++----- 2 files changed, 15 insertions(+), 8 deletions(-) diff --git a/fs/kernfs/dir.c b/fs/kernfs/dir.c index 03b688d19f69..eb2c58732bcf 100644 --- a/fs/kernfs/dir.c +++ b/fs/kernfs/dir.c @@ -753,7 +753,8 @@ int kernfs_add_one(struct kernfs_node *kn) ps_iattr = parent->iattr; if (ps_iattr) { struct iattr *ps_iattrs = &ps_iattr->ia_iattr; - ps_iattrs->ia_ctime = ps_iattrs->ia_mtime = CURRENT_TIME; + ktime_get_real_ts(&ps_iattrs->ia_ctime); + ps_iattrs->ia_mtime = ps_iattrs->ia_ctime; } mutex_unlock(&kernfs_mutex); @@ -1279,8 +1280,9 @@ static void __kernfs_remove(struct kernfs_node *kn) /* update timestamps on the parent */ if (ps_iattr) { - ps_iattr->ia_iattr.ia_ctime = CURRENT_TIME; - ps_iattr->ia_iattr.ia_mtime = CURRENT_TIME; + ktime_get_real_ts(&ps_iattr->ia_iattr.ia_ctime); + ps_iattr->ia_iattr.ia_mtime = + ps_iattr->ia_iattr.ia_ctime; } kernfs_put(pos); diff --git a/fs/kernfs/inode.c b/fs/kernfs/inode.c index 16405ae88d2d..1ac1dbae5aba 100644 --- a/fs/kernfs/inode.c +++ b/fs/kernfs/inode.c @@ -54,7 +54,10 @@ static struct kernfs_iattrs *kernfs_iattrs(struct kernfs_node *kn) iattrs->ia_mode = kn->mode; iattrs->ia_uid = GLOBAL_ROOT_UID; iattrs->ia_gid = GLOBAL_ROOT_GID; - iattrs->ia_atime = iattrs->ia_mtime = iattrs->ia_ctime = CURRENT_TIME; + + ktime_get_real_ts(&iattrs->ia_atime); + iattrs->ia_mtime = iattrs->ia_atime; + iattrs->ia_ctime = iattrs->ia_atime; simple_xattrs_init(&kn->iattr->xattrs); out_unlock: @@ -236,16 +239,18 @@ ssize_t kernfs_iop_listxattr(struct dentry *dentry, char *buf, size_t size) static inline void set_default_inode_attr(struct inode *inode, umode_t mode) { inode->i_mode = mode; - inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME; + inode->i_atime = inode->i_mtime = + inode->i_ctime = current_fs_time(inode->i_sb); } static inline void set_inode_attr(struct inode *inode, struct iattr *iattr) { + struct super_block *sb = inode->i_sb; inode->i_uid = iattr->ia_uid; inode->i_gid = iattr->ia_gid; - inode->i_atime = iattr->ia_atime; - inode->i_mtime = iattr->ia_mtime; - inode->i_ctime = iattr->ia_ctime; + inode->i_atime = timespec_trunc(iattr->ia_atime, sb->s_time_gran); + inode->i_mtime = timespec_trunc(iattr->ia_mtime, sb->s_time_gran); + inode->i_ctime = timespec_trunc(iattr->ia_ctime, sb->s_time_gran); } static void kernfs_refresh_inode(struct kernfs_node *kn, struct inode *inode) -- 2.30.2