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utimes: Clamp the timestamps in notify_change() 

commit eb31e2f63d85d1bec4f7b136f317e03c03db5503 upstream.

Push clamping timestamps into notify_change(), so in-kernel
callers like nfsd and overlayfs will get similar timestamp
set behavior as utimes.

AV: get rid of clamping in ->setattr() instances; we don't need
to bother with that there, with notify_change() doing normalization
in all cases now (it already did for implicit case, since current_time()
clamps).

Suggested-by: Miklos Szeredi <mszeredi@redhat.com>
Fixes: 42e729b9dd ("utimes: Clamp the timestamps before update")
Cc: stable@vger.kernel.org # v5.4
Cc: Deepa Dinamani <deepa.kernel@gmail.com>
Cc: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Amir Goldstein 2019-11-24 21:31:45 +02:00 committed by Greg Kroah-Hartman
parent 73031a617a
commit cb33e477a5
6 changed files with 34 additions and 56 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

23
fs/attr.c
View File

@ -183,18 +183,12 @@ void setattr_copy(struct inode *inode, const struct iattr *attr)
inode->i_uid = attr->ia_uid;
if (ia_valid & ATTR_GID)
inode->i_gid = attr->ia_gid;
if (ia_valid & ATTR_ATIME) {
inode->i_atime = timestamp_truncate(attr->ia_atime,
inode);
}
if (ia_valid & ATTR_MTIME) {
inode->i_mtime = timestamp_truncate(attr->ia_mtime,
inode);
}
if (ia_valid & ATTR_CTIME) {
inode->i_ctime = timestamp_truncate(attr->ia_ctime,
inode);
}
if (ia_valid & ATTR_ATIME)
inode->i_atime = attr->ia_atime;
if (ia_valid & ATTR_MTIME)
inode->i_mtime = attr->ia_mtime;
if (ia_valid & ATTR_CTIME)
inode->i_ctime = attr->ia_ctime;
if (ia_valid & ATTR_MODE) {
umode_t mode = attr->ia_mode;
@ -268,8 +262,13 @@ int notify_change(struct dentry * dentry, struct iattr * attr, struct inode **de
attr->ia_ctime = now;
if (!(ia_valid & ATTR_ATIME_SET))
attr->ia_atime = now;
else
attr->ia_atime = timestamp_truncate(attr->ia_atime, inode);
if (!(ia_valid & ATTR_MTIME_SET))
attr->ia_mtime = now;
else
attr->ia_mtime = timestamp_truncate(attr->ia_mtime, inode);
if (ia_valid & ATTR_KILL_PRIV) {
error = security_inode_need_killpriv(dentry);
if (error < 0)

9
fs/configfs/inode.c
View File

@ -76,14 +76,11 @@ int configfs_setattr(struct dentry * dentry, struct iattr * iattr)
if (ia_valid & ATTR_GID)
sd_iattr->ia_gid = iattr->ia_gid;
if (ia_valid & ATTR_ATIME)
sd_iattr->ia_atime = timestamp_truncate(iattr->ia_atime,
inode);
sd_iattr->ia_atime = iattr->ia_atime;
if (ia_valid & ATTR_MTIME)
sd_iattr->ia_mtime = timestamp_truncate(iattr->ia_mtime,
inode);
sd_iattr->ia_mtime = iattr->ia_mtime;
if (ia_valid & ATTR_CTIME)
sd_iattr->ia_ctime = timestamp_truncate(iattr->ia_ctime,
inode);
sd_iattr->ia_ctime = iattr->ia_ctime;
if (ia_valid & ATTR_MODE) {
umode_t mode = iattr->ia_mode;

18
fs/f2fs/file.c
View File

@ -751,18 +751,12 @@ static void __setattr_copy(struct inode *inode, const struct iattr *attr)
inode->i_uid = attr->ia_uid;
if (ia_valid & ATTR_GID)
inode->i_gid = attr->ia_gid;
if (ia_valid & ATTR_ATIME) {
inode->i_atime = timestamp_truncate(attr->ia_atime,
inode);
}
if (ia_valid & ATTR_MTIME) {
inode->i_mtime = timestamp_truncate(attr->ia_mtime,
inode);
}
if (ia_valid & ATTR_CTIME) {
inode->i_ctime = timestamp_truncate(attr->ia_ctime,
inode);
}
if (ia_valid & ATTR_ATIME)
inode->i_atime = attr->ia_atime;
if (ia_valid & ATTR_MTIME)
inode->i_mtime = attr->ia_mtime;
if (ia_valid & ATTR_CTIME)
inode->i_ctime = attr->ia_ctime;
if (ia_valid & ATTR_MODE) {
umode_t mode = attr->ia_mode;

18
fs/ntfs/inode.c
View File

@ -2899,18 +2899,12 @@ int ntfs_setattr(struct dentry *dentry, struct iattr *attr)
ia_valid |= ATTR_MTIME | ATTR_CTIME;
}
}
if (ia_valid & ATTR_ATIME) {
vi->i_atime = timestamp_truncate(attr->ia_atime,
vi);
}
if (ia_valid & ATTR_MTIME) {
vi->i_mtime = timestamp_truncate(attr->ia_mtime,
vi);
}
if (ia_valid & ATTR_CTIME) {
vi->i_ctime = timestamp_truncate(attr->ia_ctime,
vi);
}
if (ia_valid & ATTR_ATIME)
vi->i_atime = attr->ia_atime;
if (ia_valid & ATTR_MTIME)
vi->i_mtime = attr->ia_mtime;
if (ia_valid & ATTR_CTIME)
vi->i_ctime = attr->ia_ctime;
mark_inode_dirty(vi);
out:
return err;

18
fs/ubifs/file.c
View File

@ -1078,18 +1078,12 @@ static void do_attr_changes(struct inode *inode, const struct iattr *attr)
inode->i_uid = attr->ia_uid;
if (attr->ia_valid & ATTR_GID)
inode->i_gid = attr->ia_gid;
if (attr->ia_valid & ATTR_ATIME) {
inode->i_atime = timestamp_truncate(attr->ia_atime,
inode);
}
if (attr->ia_valid & ATTR_MTIME) {
inode->i_mtime = timestamp_truncate(attr->ia_mtime,
inode);
}
if (attr->ia_valid & ATTR_CTIME) {
inode->i_ctime = timestamp_truncate(attr->ia_ctime,
inode);
}
if (attr->ia_valid & ATTR_ATIME)
inode->i_atime = attr->ia_atime;
if (attr->ia_valid & ATTR_MTIME)
inode->i_mtime = attr->ia_mtime;
if (attr->ia_valid & ATTR_CTIME)
inode->i_ctime = attr->ia_ctime;
if (attr->ia_valid & ATTR_MODE) {
umode_t mode = attr->ia_mode;

4
fs/utimes.c
View File

@ -36,14 +36,14 @@ static int utimes_common(const struct path *path, struct timespec64 *times)
if (times[0].tv_nsec == UTIME_OMIT)
newattrs.ia_valid &= ~ATTR_ATIME;
else if (times[0].tv_nsec != UTIME_NOW) {
newattrs.ia_atime = timestamp_truncate(times[0], inode);
newattrs.ia_atime = times[0];
newattrs.ia_valid |= ATTR_ATIME_SET;
}
if (times[1].tv_nsec == UTIME_OMIT)
newattrs.ia_valid &= ~ATTR_MTIME;
else if (times[1].tv_nsec != UTIME_NOW) {
newattrs.ia_mtime = timestamp_truncate(times[1], inode);
newattrs.ia_mtime = times[1];
newattrs.ia_valid |= ATTR_MTIME_SET;
}
/*