Merge branch 'imm.timestamp' of git:https://git.kernel.org/pub/scm/linux/ke…

…rnel/git/viro/vfs

Pull vfs timestamp updates from Al Viro:
 "More 64bit timestamp work"

* 'imm.timestamp' of git:https://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  kernfs: don't bother with timestamp truncation
  fs: Do not overload update_time
  fs: Delete timespec64_trunc()
  fs: ubifs: Eliminate timespec64_trunc() usage
  fs: ceph: Delete timespec64_trunc() usage
  fs: cifs: Delete usage of timespec64_trunc
  fs: fat: Eliminate timespec64_trunc() usage
  utimes: Clamp the timestamps in notify_change()

fs/attr.c

@@ -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)

fs/ceph/mds_client.c

@@ -2072,7 +2072,6 @@ struct ceph_mds_request *
 ceph_mdsc_create_request(struct ceph_mds_client *mdsc, int op, int mode)
 {
  struct ceph_mds_request *req = kzalloc(sizeof(*req), GFP_NOFS);
- struct timespec64 ts;
 
  if (!req)
  return ERR_PTR(-ENOMEM);
@@ -2091,8 +2090,7 @@ ceph_mdsc_create_request(struct ceph_mds_client *mdsc, int op, int mode)
  init_completion(&req->r_safe_completion);
  INIT_LIST_HEAD(&req->r_unsafe_item);
 
- ktime_get_coarse_real_ts64(&ts);
- req->r_stamp = timespec64_trunc(ts, mdsc->fsc->sb->s_time_gran);
+ ktime_get_coarse_real_ts64(&req->r_stamp);
 
  req->r_op = op;
  req->r_direct_mode = mode;

fs/cifs/inode.c

@@ -113,6 +113,7 @@ cifs_revalidate_cache(struct inode *inode, struct cifs_fattr *fattr)
  }
 
  /* revalidate if mtime or size have changed */
+ fattr->cf_mtime = timestamp_truncate(fattr->cf_mtime, inode);
  if (timespec64_equal(&inode->i_mtime, &fattr->cf_mtime) &&
  cifs_i->server_eof == fattr->cf_eof) {
  cifs_dbg(FYI, "%s: inode %llu is unchanged\n",
@@ -162,6 +163,9 @@ cifs_fattr_to_inode(struct inode *inode, struct cifs_fattr *fattr)
  cifs_revalidate_cache(inode, fattr);
 
  spin_lock(&inode->i_lock);
+ fattr->cf_mtime = timestamp_truncate(fattr->cf_mtime, inode);
+ fattr->cf_atime = timestamp_truncate(fattr->cf_atime, inode);
+ fattr->cf_ctime = timestamp_truncate(fattr->cf_ctime, inode);
  /* we do not want atime to be less than mtime, it broke some apps */
  if (timespec64_compare(&fattr->cf_atime, &fattr->cf_mtime) < 0)
  inode->i_atime = fattr->cf_mtime;
@@ -329,8 +333,7 @@ cifs_create_dfs_fattr(struct cifs_fattr *fattr, struct super_block *sb)
  fattr->cf_mode = S_IFDIR | S_IXUGO | S_IRWXU;
  fattr->cf_uid = cifs_sb->mnt_uid;
  fattr->cf_gid = cifs_sb->mnt_gid;
- ktime_get_real_ts64(&fattr->cf_mtime);
- fattr->cf_mtime = timespec64_trunc(fattr->cf_mtime, sb->s_time_gran);
+ ktime_get_coarse_real_ts64(&fattr->cf_mtime);
  fattr->cf_atime = fattr->cf_ctime = fattr->cf_mtime;
  fattr->cf_nlink = 2;
  fattr->cf_flags = CIFS_FATTR_DFS_REFERRAL;
@@ -609,10 +612,8 @@ cifs_all_info_to_fattr(struct cifs_fattr *fattr, FILE_ALL_INFO *info,
 
  if (info->LastAccessTime)
  fattr->cf_atime = cifs_NTtimeToUnix(info->LastAccessTime);
- else {
- ktime_get_real_ts64(&fattr->cf_atime);
- fattr->cf_atime = timespec64_trunc(fattr->cf_atime, sb->s_time_gran);
- }
+ else
+ ktime_get_coarse_real_ts64(&fattr->cf_atime);
 
  fattr->cf_ctime = cifs_NTtimeToUnix(info->ChangeTime);
  fattr->cf_mtime = cifs_NTtimeToUnix(info->LastWriteTime);

fs/configfs/inode.c

@@ -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;
 

fs/f2fs/file.c

@@ -829,18 +829,12 @@ 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;
 

fs/fat/misc.c

@@ -271,6 +271,14 @@ static inline struct timespec64 fat_timespec64_trunc_2secs(struct timespec64 ts)
 {
  return (struct timespec64){ ts.tv_sec & ~1ULL, 0 };
 }
+
+static inline struct timespec64 fat_timespec64_trunc_10ms(struct timespec64 ts)
+{
+ if (ts.tv_nsec)
+ ts.tv_nsec -= ts.tv_nsec % 10000000UL;
+ return ts;
+}
+
 /*
  * truncate the various times with appropriate granularity:
  * root inode:
@@ -308,7 +316,7 @@ int fat_truncate_time(struct inode *inode, struct timespec64 *now, int flags)
  }
  if (flags & S_CTIME) {
  if (sbi->options.isvfat)
- inode->i_ctime = timespec64_trunc(*now, 10000000);
+ inode->i_ctime = fat_timespec64_trunc_10ms(*now);
  else
  inode->i_ctime = fat_timespec64_trunc_2secs(*now);
  }

fs/inode.c

@@ -1683,12 +1683,9 @@ EXPORT_SYMBOL(generic_update_time);
  */
 static int update_time(struct inode *inode, struct timespec64 *time, int flags)
 {
- int (*update_time)(struct inode *, struct timespec64 *, int);
-
- update_time = inode->i_op->update_time ? inode->i_op->update_time :
- generic_update_time;
-
- return update_time(inode, time, flags);
+ if (inode->i_op->update_time)
+ return inode->i_op->update_time(inode, time, flags);
+ return generic_update_time(inode, time, flags);
 }
 
 /**
@@ -2153,30 +2150,6 @@ void inode_nohighmem(struct inode *inode)
 }
 EXPORT_SYMBOL(inode_nohighmem);
 
-/**
- * timespec64_trunc - Truncate timespec64 to a granularity
- * @t: Timespec64
- * @gran: Granularity in ns.
- *
- * Truncate a timespec64 to a granularity. Always rounds down. gran must
- * not be 0 nor greater than a second (NSEC_PER_SEC, or 10^9 ns).
- */
-struct timespec64 timespec64_trunc(struct timespec64 t, unsigned gran)
-{
- /* Avoid division in the common cases 1 ns and 1 s. */
- if (gran == 1) {
- /* nothing */
- } else if (gran == NSEC_PER_SEC) {
- t.tv_nsec = 0;
- } else if (gran > 1 && gran < NSEC_PER_SEC) {
- t.tv_nsec -= t.tv_nsec % gran;
- } else {
- WARN(1, "illegal file time granularity: %u", gran);
- }
- return t;
-}
-EXPORT_SYMBOL(timespec64_trunc);
-
 /**
  * timestamp_truncate - Truncate timespec to a granularity
  * @t: Timespec

fs/kernfs/inode.c

@@ -160,9 +160,9 @@ static inline void set_inode_attr(struct inode *inode,
 {
  inode->i_uid = attrs->ia_uid;
  inode->i_gid = attrs->ia_gid;
- inode->i_atime = timestamp_truncate(attrs->ia_atime, inode);
- inode->i_mtime = timestamp_truncate(attrs->ia_mtime, inode);
- inode->i_ctime = timestamp_truncate(attrs->ia_ctime, inode);
+ inode->i_atime = attrs->ia_atime;
+ inode->i_mtime = attrs->ia_mtime;
+ inode->i_ctime = attrs->ia_ctime;
 }
 
 static void kernfs_refresh_inode(struct kernfs_node *kn, struct inode *inode)

fs/ntfs/inode.c

@@ -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;

fs/ubifs/file.c

@@ -1080,18 +1080,12 @@ 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;
 

fs/ubifs/sb.c

@@ -84,7 +84,6 @@ static int create_default_filesystem(struct ubifs_info *c)
  int idx_node_size;
  long long tmp64, main_bytes;
  __le64 tmp_le64;
- __le32 tmp_le32;
  struct timespec64 ts;
  u8 hash[UBIFS_HASH_ARR_SZ];
  u8 hash_lpt[UBIFS_HASH_ARR_SZ];
@@ -291,16 +290,14 @@ static int create_default_filesystem(struct ubifs_info *c)
  ino->creat_sqnum = cpu_to_le64(++c->max_sqnum);
  ino->nlink = cpu_to_le32(2);
 
- ktime_get_real_ts64(&ts);
- ts = timespec64_trunc(ts, DEFAULT_TIME_GRAN);
+ ktime_get_coarse_real_ts64(&ts);
  tmp_le64 = cpu_to_le64(ts.tv_sec);
  ino->atime_sec = tmp_le64;
  ino->ctime_sec = tmp_le64;
  ino->mtime_sec = tmp_le64;
- tmp_le32 = cpu_to_le32(ts.tv_nsec);
- ino->atime_nsec = tmp_le32;
- ino->ctime_nsec = tmp_le32;
- ino->mtime_nsec = tmp_le32;
+ ino->atime_nsec = 0;
+ ino->ctime_nsec = 0;
+ ino->mtime_nsec = 0;
  ino->mode = cpu_to_le32(S_IFDIR | S_IRUGO | S_IWUSR | S_IXUGO);
  ino->size = cpu_to_le64(UBIFS_INO_NODE_SZ);
 

fs/utimes.c

@@ -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;
  }
  /*

include/linux/fs.h

@@ -1575,7 +1575,6 @@ 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 timespec64 timespec64_trunc(struct timespec64 t, unsigned gran);
 extern struct timespec64 current_time(struct inode *inode);
 
 /*