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Subject[PATCH v4 08/26] fs: ext4: Use current_time() for inode timestamps
Date
CURRENT_TIME_SEC and CURRENT_TIME are not y2038 safe.
current_time() will be transitioned to be y2038 safe
along with vfs.

current_time() returns timestamps according to the
granularities set in the super_block.
The granularity check in ext4_current_time() to call
current_time() or CURRENT_TIME_SEC is not required.
Use current_time() directly to obtain timestamps
unconditionally, and remove ext4_current_time().

Quota files are assumed to be on the same filesystem.
Hence, use current_time() for these files as well.

Signed-off-by: Deepa Dinamani <deepa.kernel@gmail.com>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Cc: "Theodore Ts'o" <tytso@mit.edu>
Cc: Andreas Dilger <adilger.kernel@dilger.ca>
Cc: linux-ext4@vger.kernel.org
---
fs/ext4/acl.c | 2 +-
fs/ext4/ext4.h | 6 ------
fs/ext4/extents.c | 10 +++++-----
fs/ext4/ialloc.c | 2 +-
fs/ext4/inline.c | 4 ++--
fs/ext4/inode.c | 6 +++---
fs/ext4/ioctl.c | 8 ++++----
fs/ext4/namei.c | 24 +++++++++++++-----------
fs/ext4/super.c | 2 +-
fs/ext4/xattr.c | 2 +-
10 files changed, 31 insertions(+), 35 deletions(-)

diff --git a/fs/ext4/acl.c b/fs/ext4/acl.c
index c6601a4..733e2f24 100644
--- a/fs/ext4/acl.c
+++ b/fs/ext4/acl.c
@@ -197,7 +197,7 @@ __ext4_set_acl(handle_t *handle, struct inode *inode, int type,
if (error < 0)
return error;
else {
- inode->i_ctime = ext4_current_time(inode);
+ inode->i_ctime = current_time(inode);
ext4_mark_inode_dirty(handle, inode);
if (error == 0)
acl = NULL;
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index ea31931..71281d1 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -1523,12 +1523,6 @@ static inline struct ext4_inode_info *EXT4_I(struct inode *inode)
return container_of(inode, struct ext4_inode_info, vfs_inode);
}

-static inline struct timespec ext4_current_time(struct inode *inode)
-{
- return (inode->i_sb->s_time_gran < NSEC_PER_SEC) ?
- current_fs_time(inode->i_sb) : CURRENT_TIME_SEC;
-}
-
static inline int ext4_valid_inum(struct super_block *sb, unsigned long ino)
{
return ino == EXT4_ROOT_INO ||
diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
index d7ccb7f..de82cb9 100644
--- a/fs/ext4/extents.c
+++ b/fs/ext4/extents.c
@@ -4730,7 +4730,7 @@ retry:
map.m_lblk += ret;
map.m_len = len = len - ret;
epos = (loff_t)map.m_lblk << inode->i_blkbits;
- inode->i_ctime = ext4_current_time(inode);
+ inode->i_ctime = current_time(inode);
if (new_size) {
if (epos > new_size)
epos = new_size;
@@ -4858,7 +4858,7 @@ static long ext4_zero_range(struct file *file, loff_t offset,
}
/* Now release the pages and zero block aligned part of pages */
truncate_pagecache_range(inode, start, end - 1);
- inode->i_mtime = inode->i_ctime = ext4_current_time(inode);
+ inode->i_mtime = inode->i_ctime = current_time(inode);

ret = ext4_alloc_file_blocks(file, lblk, max_blocks, new_size,
flags, mode);
@@ -4883,7 +4883,7 @@ static long ext4_zero_range(struct file *file, loff_t offset,
goto out_dio;
}

- inode->i_mtime = inode->i_ctime = ext4_current_time(inode);
+ inode->i_mtime = inode->i_ctime = current_time(inode);
if (new_size) {
ext4_update_inode_size(inode, new_size);
} else {
@@ -5582,7 +5582,7 @@ int ext4_collapse_range(struct inode *inode, loff_t offset, loff_t len)
up_write(&EXT4_I(inode)->i_data_sem);
if (IS_SYNC(inode))
ext4_handle_sync(handle);
- inode->i_mtime = inode->i_ctime = ext4_current_time(inode);
+ inode->i_mtime = inode->i_ctime = current_time(inode);
ext4_mark_inode_dirty(handle, inode);

out_stop:
@@ -5692,7 +5692,7 @@ int ext4_insert_range(struct inode *inode, loff_t offset, loff_t len)
/* Expand file to avoid data loss if there is error while shifting */
inode->i_size += len;
EXT4_I(inode)->i_disksize += len;
- inode->i_mtime = inode->i_ctime = ext4_current_time(inode);
+ inode->i_mtime = inode->i_ctime = current_time(inode);
ret = ext4_mark_inode_dirty(handle, inode);
if (ret)
goto out_stop;
diff --git a/fs/ext4/ialloc.c b/fs/ext4/ialloc.c
index 9e66cd1..9b05648 100644
--- a/fs/ext4/ialloc.c
+++ b/fs/ext4/ialloc.c
@@ -1039,7 +1039,7 @@ got:
/* This is the optimal IO size (for stat), not the fs block size */
inode->i_blocks = 0;
inode->i_mtime = inode->i_atime = inode->i_ctime = ei->i_crtime =
- ext4_current_time(inode);
+ current_time(inode);

memset(ei->i_data, 0, sizeof(ei->i_data));
ei->i_dir_start_lookup = 0;
diff --git a/fs/ext4/inline.c b/fs/ext4/inline.c
index f74d5ee..cfa87bd 100644
--- a/fs/ext4/inline.c
+++ b/fs/ext4/inline.c
@@ -1028,7 +1028,7 @@ static int ext4_add_dirent_to_inline(handle_t *handle,
* happen is that the times are slightly out of date
* and/or different from the directory change time.
*/
- dir->i_mtime = dir->i_ctime = ext4_current_time(dir);
+ dir->i_mtime = dir->i_ctime = current_time(dir);
ext4_update_dx_flag(dir);
dir->i_version++;
ext4_mark_inode_dirty(handle, dir);
@@ -1971,7 +1971,7 @@ out:
if (inode->i_nlink)
ext4_orphan_del(handle, inode);

- inode->i_mtime = inode->i_ctime = ext4_current_time(inode);
+ inode->i_mtime = inode->i_ctime = current_time(inode);
ext4_mark_inode_dirty(handle, inode);
if (IS_SYNC(inode))
ext4_handle_sync(handle);
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 3131747..05ef5a1 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -4020,7 +4020,7 @@ int ext4_punch_hole(struct inode *inode, loff_t offset, loff_t length)
if (IS_SYNC(inode))
ext4_handle_sync(handle);

- inode->i_mtime = inode->i_ctime = ext4_current_time(inode);
+ inode->i_mtime = inode->i_ctime = current_time(inode);
ext4_mark_inode_dirty(handle, inode);
out_stop:
ext4_journal_stop(handle);
@@ -4174,7 +4174,7 @@ out_stop:
if (inode->i_nlink)
ext4_orphan_del(handle, inode);

- inode->i_mtime = inode->i_ctime = ext4_current_time(inode);
+ inode->i_mtime = inode->i_ctime = current_time(inode);
ext4_mark_inode_dirty(handle, inode);
ext4_journal_stop(handle);

@@ -5149,7 +5149,7 @@ int ext4_setattr(struct dentry *dentry, struct iattr *attr)
* update c/mtime in shrink case below
*/
if (!shrink) {
- inode->i_mtime = ext4_current_time(inode);
+ inode->i_mtime = current_time(inode);
inode->i_ctime = inode->i_mtime;
}
down_write(&EXT4_I(inode)->i_data_sem);
diff --git a/fs/ext4/ioctl.c b/fs/ext4/ioctl.c
index 10686fd..9391985 100644
--- a/fs/ext4/ioctl.c
+++ b/fs/ext4/ioctl.c
@@ -155,7 +155,7 @@ static long swap_inode_boot_loader(struct super_block *sb,

swap_inode_data(inode, inode_bl);

- inode->i_ctime = inode_bl->i_ctime = ext4_current_time(inode);
+ inode->i_ctime = inode_bl->i_ctime = current_time(inode);

spin_lock(&sbi->s_next_gen_lock);
inode->i_generation = sbi->s_next_generation++;
@@ -274,7 +274,7 @@ static int ext4_ioctl_setflags(struct inode *inode,
}

ext4_set_inode_flags(inode);
- inode->i_ctime = ext4_current_time(inode);
+ inode->i_ctime = current_time(inode);

err = ext4_mark_iloc_dirty(handle, inode, &iloc);
flags_err:
@@ -371,7 +371,7 @@ static int ext4_ioctl_setproject(struct file *filp, __u32 projid)
}

EXT4_I(inode)->i_projid = kprojid;
- inode->i_ctime = ext4_current_time(inode);
+ inode->i_ctime = current_time(inode);
out_dirty:
rc = ext4_mark_iloc_dirty(handle, inode, &iloc);
if (!err)
@@ -503,7 +503,7 @@ long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
}
err = ext4_reserve_inode_write(handle, inode, &iloc);
if (err == 0) {
- inode->i_ctime = ext4_current_time(inode);
+ inode->i_ctime = current_time(inode);
inode->i_generation = generation;
err = ext4_mark_iloc_dirty(handle, inode, &iloc);
}
diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c
index 34c0142..f748cea 100644
--- a/fs/ext4/namei.c
+++ b/fs/ext4/namei.c
@@ -1939,7 +1939,7 @@ static int add_dirent_to_buf(handle_t *handle, struct ext4_filename *fname,
* happen is that the times are slightly out of date
* and/or different from the directory change time.
*/
- dir->i_mtime = dir->i_ctime = ext4_current_time(dir);
+ dir->i_mtime = dir->i_ctime = current_time(dir);
ext4_update_dx_flag(dir);
dir->i_version++;
ext4_mark_inode_dirty(handle, dir);
@@ -2987,7 +2987,7 @@ static int ext4_rmdir(struct inode *dir, struct dentry *dentry)
* recovery. */
inode->i_size = 0;
ext4_orphan_add(handle, inode);
- inode->i_ctime = dir->i_ctime = dir->i_mtime = ext4_current_time(inode);
+ inode->i_ctime = dir->i_ctime = dir->i_mtime = current_time(inode);
ext4_mark_inode_dirty(handle, inode);
ext4_dec_count(handle, dir);
ext4_update_dx_flag(dir);
@@ -3050,13 +3050,13 @@ static int ext4_unlink(struct inode *dir, struct dentry *dentry)
retval = ext4_delete_entry(handle, dir, de, bh);
if (retval)
goto end_unlink;
- dir->i_ctime = dir->i_mtime = ext4_current_time(dir);
+ dir->i_ctime = dir->i_mtime = current_time(dir);
ext4_update_dx_flag(dir);
ext4_mark_inode_dirty(handle, dir);
drop_nlink(inode);
if (!inode->i_nlink)
ext4_orphan_add(handle, inode);
- inode->i_ctime = ext4_current_time(inode);
+ inode->i_ctime = current_time(inode);
ext4_mark_inode_dirty(handle, inode);

end_unlink:
@@ -3254,7 +3254,7 @@ retry:
if (IS_DIRSYNC(dir))
ext4_handle_sync(handle);

- inode->i_ctime = ext4_current_time(inode);
+ inode->i_ctime = current_time(inode);
ext4_inc_count(handle, inode);
ihold(inode);

@@ -3381,7 +3381,7 @@ static int ext4_setent(handle_t *handle, struct ext4_renament *ent,
ent->de->file_type = file_type;
ent->dir->i_version++;
ent->dir->i_ctime = ent->dir->i_mtime =
- ext4_current_time(ent->dir);
+ current_time(ent->dir);
ext4_mark_inode_dirty(handle, ent->dir);
BUFFER_TRACE(ent->bh, "call ext4_handle_dirty_metadata");
if (!ent->inlined) {
@@ -3651,7 +3651,7 @@ static int ext4_rename(struct inode *old_dir, struct dentry *old_dentry,
* Like most other Unix systems, set the ctime for inodes on a
* rename.
*/
- old.inode->i_ctime = ext4_current_time(old.inode);
+ old.inode->i_ctime = current_time(old.inode);
ext4_mark_inode_dirty(handle, old.inode);

if (!whiteout) {
@@ -3663,9 +3663,9 @@ static int ext4_rename(struct inode *old_dir, struct dentry *old_dentry,

if (new.inode) {
ext4_dec_count(handle, new.inode);
- new.inode->i_ctime = ext4_current_time(new.inode);
+ new.inode->i_ctime = current_time(new.inode);
}
- old.dir->i_ctime = old.dir->i_mtime = ext4_current_time(old.dir);
+ old.dir->i_ctime = old.dir->i_mtime = current_time(old.dir);
ext4_update_dx_flag(old.dir);
if (old.dir_bh) {
retval = ext4_rename_dir_finish(handle, &old, new.dir->i_ino);
@@ -3723,6 +3723,7 @@ static int ext4_cross_rename(struct inode *old_dir, struct dentry *old_dentry,
};
u8 new_file_type;
int retval;
+ struct timespec ctime;

if ((ext4_encrypted_inode(old_dir) ||
ext4_encrypted_inode(new_dir)) &&
@@ -3823,8 +3824,9 @@ static int ext4_cross_rename(struct inode *old_dir, struct dentry *old_dentry,
* Like most other Unix systems, set the ctime for inodes on a
* rename.
*/
- old.inode->i_ctime = ext4_current_time(old.inode);
- new.inode->i_ctime = ext4_current_time(new.inode);
+ ctime = current_time(old.inode);
+ old.inode->i_ctime = ctime;
+ new.inode->i_ctime = ctime;
ext4_mark_inode_dirty(handle, old.inode);
ext4_mark_inode_dirty(handle, new.inode);

diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 1c593aa..cba1927 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -5270,7 +5270,7 @@ static int ext4_quota_off(struct super_block *sb, int type)
handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 1);
if (IS_ERR(handle))
goto out;
- inode->i_mtime = inode->i_ctime = CURRENT_TIME;
+ inode->i_mtime = inode->i_ctime = current_time(inode);
ext4_mark_inode_dirty(handle, inode);
ext4_journal_stop(handle);

diff --git a/fs/ext4/xattr.c b/fs/ext4/xattr.c
index 39e9cfb..516c8ee 100644
--- a/fs/ext4/xattr.c
+++ b/fs/ext4/xattr.c
@@ -1254,7 +1254,7 @@ ext4_xattr_set_handle(handle_t *handle, struct inode *inode, int name_index,
}
if (!error) {
ext4_xattr_update_super_block(handle, inode->i_sb);
- inode->i_ctime = ext4_current_time(inode);
+ inode->i_ctime = current_time(inode);
if (!value)
ext4_clear_inode_state(inode, EXT4_STATE_NO_EXPAND);
error = ext4_mark_iloc_dirty(handle, inode, &is.iloc);
--
1.9.1
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