| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-ID: <7f2bbca046f120d6dc6f64c22f94dafa0becace3.camel@kernel.org>
Date: Thu, 06 Jul 2023 08:10:24 -0400
From: Jeff Layton <jlayton@...nel.org>
To: Zhihao Cheng <chengzhihao1@...wei.com>,
Christian Brauner <brauner@...nel.org>,
Richard Weinberger <richard@....at>
Cc: Al Viro <viro@...iv.linux.org.uk>, Jan Kara <jack@...e.cz>,
linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-mtd@...ts.infradead.org
Subject: Re: [PATCH v2 78/92] ubifs: convert to ctime accessor functions
On Thu, 2023-07-06 at 20:07 +0800, Zhihao Cheng wrote:
> 在 2023/7/6 3:01, Jeff Layton 写道:
> > In later patches, we're going to change how the inode's ctime field is
> > used. Switch to using accessor functions instead of raw accesses of
> > inode->i_ctime.
> >
> > Signed-off-by: Jeff Layton <jlayton@...nel.org>
> > ---
> > fs/ubifs/debug.c | 4 ++--
> > fs/ubifs/dir.c | 24 +++++++++++-------------
> > fs/ubifs/file.c | 16 +++++++++-------
> > fs/ubifs/ioctl.c | 2 +-
> > fs/ubifs/journal.c | 4 ++--
> > fs/ubifs/super.c | 4 ++--
> > fs/ubifs/xattr.c | 6 +++---
> > 7 files changed, 30 insertions(+), 30 deletions(-)
> >
> > diff --git a/fs/ubifs/debug.c b/fs/ubifs/debug.c
> > index 9c9d3f0e36a4..eef9e527d9ff 100644
> > --- a/fs/ubifs/debug.c
> > +++ b/fs/ubifs/debug.c
> > @@ -243,8 +243,8 @@ void ubifs_dump_inode(struct ubifs_info *c, const struct inode *inode)
> > (unsigned int)inode->i_mtime.tv_sec,
> > (unsigned int)inode->i_mtime.tv_nsec);
> > pr_err("\tctime %u.%u\n",
> > - (unsigned int)inode->i_ctime.tv_sec,
> > - (unsigned int)inode->i_ctime.tv_nsec);
> > + (unsigned int) inode_get_ctime(inode).tv_sec,
> > + (unsigned int) inode_get_ctime(inode).tv_nsec);
> > pr_err("\tcreat_sqnum %llu\n", ui->creat_sqnum);
> > pr_err("\txattr_size %u\n", ui->xattr_size);
> > pr_err("\txattr_cnt %u\n", ui->xattr_cnt);
> > diff --git a/fs/ubifs/dir.c b/fs/ubifs/dir.c
> > index 7ec25310bd8a..3a1ba8ba308a 100644
> > --- a/fs/ubifs/dir.c
> > +++ b/fs/ubifs/dir.c
> > @@ -96,8 +96,7 @@ struct inode *ubifs_new_inode(struct ubifs_info *c, struct inode *dir,
> > inode->i_flags |= S_NOCMTIME;
> >
> > inode_init_owner(&nop_mnt_idmap, inode, dir, mode);
> > - inode->i_mtime = inode->i_atime = inode->i_ctime =
> > - current_time(inode);
> > + inode->i_mtime = inode->i_atime = inode_set_ctime_current(inode);
> > inode->i_mapping->nrpages = 0;
> >
> > if (!is_xattr) {
> > @@ -325,7 +324,7 @@ static int ubifs_create(struct mnt_idmap *idmap, struct inode *dir,
> > mutex_lock(&dir_ui->ui_mutex);
> > dir->i_size += sz_change;
> > dir_ui->ui_size = dir->i_size;
> > - dir->i_mtime = dir->i_ctime = inode->i_ctime;
> > + dir->i_mtime = inode_set_ctime_to_ts(dir, inode_get_ctime(inode));
> > err = ubifs_jnl_update(c, dir, &nm, inode, 0, 0);
> > if (err)
> > goto out_cancel;
> > @@ -765,10 +764,10 @@ static int ubifs_link(struct dentry *old_dentry, struct inode *dir,
> >
> > inc_nlink(inode);
> > ihold(inode);
> > - inode->i_ctime = current_time(inode);
> > + inode_set_ctime_current(inode);
> > dir->i_size += sz_change;
> > dir_ui->ui_size = dir->i_size;
> > - dir->i_mtime = dir->i_ctime = inode->i_ctime;
> > + dir->i_mtime = inode_set_ctime_to_ts(dir, inode_get_ctime(inode));
> > err = ubifs_jnl_update(c, dir, &nm, inode, 0, 0);
> > if (err)
> > goto out_cancel;
> > @@ -838,11 +837,11 @@ static int ubifs_unlink(struct inode *dir, struct dentry *dentry)
> > }
> >
> > lock_2_inodes(dir, inode);
> > - inode->i_ctime = current_time(dir);
> > + inode_set_ctime_current(inode);
> > drop_nlink(inode);
> > dir->i_size -= sz_change;
> > dir_ui->ui_size = dir->i_size;
> > - dir->i_mtime = dir->i_ctime = inode->i_ctime;
> > + dir->i_mtime = inode_set_ctime_to_ts(dir, inode_get_ctime(inode));
> > err = ubifs_jnl_update(c, dir, &nm, inode, 1, 0);
> > if (err)
> > goto out_cancel;
> > @@ -940,12 +939,12 @@ static int ubifs_rmdir(struct inode *dir, struct dentry *dentry)
> > }
> >
> > lock_2_inodes(dir, inode);
> > - inode->i_ctime = current_time(dir);
> > + inode_set_ctime_current(inode);
> > clear_nlink(inode);
> > drop_nlink(dir);
> > dir->i_size -= sz_change;
> > dir_ui->ui_size = dir->i_size;
> > - dir->i_mtime = dir->i_ctime = inode->i_ctime;
> > + dir->i_mtime = inode_set_ctime_to_ts(dir, inode_get_ctime(inode));
> > err = ubifs_jnl_update(c, dir, &nm, inode, 1, 0);
> > if (err)
> > goto out_cancel;
> > @@ -1019,7 +1018,7 @@ static int ubifs_mkdir(struct mnt_idmap *idmap, struct inode *dir,
> > inc_nlink(dir);
> > dir->i_size += sz_change;
> > dir_ui->ui_size = dir->i_size;
> > - dir->i_mtime = dir->i_ctime = inode->i_ctime;
> > + dir->i_mtime = inode_set_ctime_to_ts(dir, inode_get_ctime(inode));
> > err = ubifs_jnl_update(c, dir, &nm, inode, 0, 0);
> > if (err) {
> > ubifs_err(c, "cannot create directory, error %d", err);
> > @@ -1110,7 +1109,7 @@ static int ubifs_mknod(struct mnt_idmap *idmap, struct inode *dir,
> > mutex_lock(&dir_ui->ui_mutex);
> > dir->i_size += sz_change;
> > dir_ui->ui_size = dir->i_size;
> > - dir->i_mtime = dir->i_ctime = inode->i_ctime;
> > + dir->i_mtime = inode_set_ctime_to_ts(dir, inode_get_ctime(inode));
> > err = ubifs_jnl_update(c, dir, &nm, inode, 0, 0);
> > if (err)
> > goto out_cancel;
> > @@ -1210,7 +1209,7 @@ static int ubifs_symlink(struct mnt_idmap *idmap, struct inode *dir,
> > mutex_lock(&dir_ui->ui_mutex);
> > dir->i_size += sz_change;
> > dir_ui->ui_size = dir->i_size;
> > - dir->i_mtime = dir->i_ctime = inode->i_ctime;
> > + dir->i_mtime = inode_set_ctime_to_ts(dir, inode_get_ctime(inode));
> > err = ubifs_jnl_update(c, dir, &nm, inode, 0, 0);
> > if (err)
> > goto out_cancel;
> > @@ -1298,7 +1297,6 @@ static int do_rename(struct inode *old_dir, struct dentry *old_dentry,
> > struct ubifs_budget_req ino_req = { .dirtied_ino = 1,
> > .dirtied_ino_d = ALIGN(old_inode_ui->data_len, 8) };
> > struct ubifs_budget_req wht_req;
> > - struct timespec64 time;
> > unsigned int saved_nlink;
> > struct fscrypt_name old_nm, new_nm;
> >
>
> It would be better to put the change of do_rename in '[PATCH v2 10/92]
> ubifs: convert to simple_rename_timestamp'.
>
> Reviewed-by: Zhihao Cheng <chengzhihao1@...wei.com>
>
Good catch. I'll fix that up in my tree.
Thanks!
> > diff --git a/fs/ubifs/file.c b/fs/ubifs/file.c
> > index 6738fe43040b..436b27d7c58f 100644
> > --- a/fs/ubifs/file.c
> > +++ b/fs/ubifs/file.c
> > @@ -1092,7 +1092,7 @@ static void do_attr_changes(struct inode *inode, const struct iattr *attr)
> > if (attr->ia_valid & ATTR_MTIME)
> > inode->i_mtime = attr->ia_mtime;
> > if (attr->ia_valid & ATTR_CTIME)
> > - inode->i_ctime = attr->ia_ctime;
> > + inode_set_ctime_to_ts(inode, attr->ia_ctime);
> > if (attr->ia_valid & ATTR_MODE) {
> > umode_t mode = attr->ia_mode;
> >
> > @@ -1192,7 +1192,7 @@ static int do_truncation(struct ubifs_info *c, struct inode *inode,
> > mutex_lock(&ui->ui_mutex);
> > ui->ui_size = inode->i_size;
> > /* Truncation changes inode [mc]time */
> > - inode->i_mtime = inode->i_ctime = current_time(inode);
> > + inode->i_mtime = inode_set_ctime_current(inode);
> > /* Other attributes may be changed at the same time as well */
> > do_attr_changes(inode, attr);
> > err = ubifs_jnl_truncate(c, inode, old_size, new_size);
> > @@ -1239,7 +1239,7 @@ static int do_setattr(struct ubifs_info *c, struct inode *inode,
> > mutex_lock(&ui->ui_mutex);
> > if (attr->ia_valid & ATTR_SIZE) {
> > /* Truncation changes inode [mc]time */
> > - inode->i_mtime = inode->i_ctime = current_time(inode);
> > + inode->i_mtime = inode_set_ctime_current(inode);
> > /* 'truncate_setsize()' changed @i_size, update @ui_size */
> > ui->ui_size = inode->i_size;
> > }
> > @@ -1364,8 +1364,10 @@ int ubifs_fsync(struct file *file, loff_t start, loff_t end, int datasync)
> > static inline int mctime_update_needed(const struct inode *inode,
> > const struct timespec64 *now)
> > {
> > + struct timespec64 ctime = inode_get_ctime(inode);
> > +
> > if (!timespec64_equal(&inode->i_mtime, now) ||
> > - !timespec64_equal(&inode->i_ctime, now))
> > + !timespec64_equal(&ctime, now))
> > return 1;
> > return 0;
> > }
> > @@ -1396,7 +1398,7 @@ int ubifs_update_time(struct inode *inode, struct timespec64 *time,
> > if (flags & S_ATIME)
> > inode->i_atime = *time;
> > if (flags & S_CTIME)
> > - inode->i_ctime = *time;
> > + inode_set_ctime_to_ts(inode, *time);
> > if (flags & S_MTIME)
> > inode->i_mtime = *time;
> >
> > @@ -1432,7 +1434,7 @@ static int update_mctime(struct inode *inode)
> > return err;
> >
> > mutex_lock(&ui->ui_mutex);
> > - inode->i_mtime = inode->i_ctime = current_time(inode);
> > + inode->i_mtime = inode_set_ctime_current(inode);
> > release = ui->dirty;
> > mark_inode_dirty_sync(inode);
> > mutex_unlock(&ui->ui_mutex);
> > @@ -1570,7 +1572,7 @@ static vm_fault_t ubifs_vm_page_mkwrite(struct vm_fault *vmf)
> > struct ubifs_inode *ui = ubifs_inode(inode);
> >
> > mutex_lock(&ui->ui_mutex);
> > - inode->i_mtime = inode->i_ctime = current_time(inode);
> > + inode->i_mtime = inode_set_ctime_current(inode);
> > release = ui->dirty;
> > mark_inode_dirty_sync(inode);
> > mutex_unlock(&ui->ui_mutex);
> > diff --git a/fs/ubifs/ioctl.c b/fs/ubifs/ioctl.c
> > index 67c5108abd89..d79cabe193c3 100644
> > --- a/fs/ubifs/ioctl.c
> > +++ b/fs/ubifs/ioctl.c
> > @@ -118,7 +118,7 @@ static int setflags(struct inode *inode, int flags)
> > ui->flags &= ~ioctl2ubifs(UBIFS_SETTABLE_IOCTL_FLAGS);
> > ui->flags |= ioctl2ubifs(flags);
> > ubifs_set_inode_flags(inode);
> > - inode->i_ctime = current_time(inode);
> > + inode_set_ctime_current(inode);
> > release = ui->dirty;
> > mark_inode_dirty_sync(inode);
> > mutex_unlock(&ui->ui_mutex);
> > diff --git a/fs/ubifs/journal.c b/fs/ubifs/journal.c
> > index dc52ac0f4a34..ffc9beee7be6 100644
> > --- a/fs/ubifs/journal.c
> > +++ b/fs/ubifs/journal.c
> > @@ -454,8 +454,8 @@ static void pack_inode(struct ubifs_info *c, struct ubifs_ino_node *ino,
> > ino->creat_sqnum = cpu_to_le64(ui->creat_sqnum);
> > ino->atime_sec = cpu_to_le64(inode->i_atime.tv_sec);
> > ino->atime_nsec = cpu_to_le32(inode->i_atime.tv_nsec);
> > - ino->ctime_sec = cpu_to_le64(inode->i_ctime.tv_sec);
> > - ino->ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
> > + ino->ctime_sec = cpu_to_le64(inode_get_ctime(inode).tv_sec);
> > + ino->ctime_nsec = cpu_to_le32(inode_get_ctime(inode).tv_nsec);
> > ino->mtime_sec = cpu_to_le64(inode->i_mtime.tv_sec);
> > ino->mtime_nsec = cpu_to_le32(inode->i_mtime.tv_nsec);
> > ino->uid = cpu_to_le32(i_uid_read(inode));
> > diff --git a/fs/ubifs/super.c b/fs/ubifs/super.c
> > index 32cb14759796..b08fb28d16b5 100644
> > --- a/fs/ubifs/super.c
> > +++ b/fs/ubifs/super.c
> > @@ -146,8 +146,8 @@ struct inode *ubifs_iget(struct super_block *sb, unsigned long inum)
> > inode->i_atime.tv_nsec = le32_to_cpu(ino->atime_nsec);
> > inode->i_mtime.tv_sec = (int64_t)le64_to_cpu(ino->mtime_sec);
> > inode->i_mtime.tv_nsec = le32_to_cpu(ino->mtime_nsec);
> > - inode->i_ctime.tv_sec = (int64_t)le64_to_cpu(ino->ctime_sec);
> > - inode->i_ctime.tv_nsec = le32_to_cpu(ino->ctime_nsec);
> > + inode_set_ctime(inode, (int64_t)le64_to_cpu(ino->ctime_sec),
> > + le32_to_cpu(ino->ctime_nsec));
> > inode->i_mode = le32_to_cpu(ino->mode);
> > inode->i_size = le64_to_cpu(ino->size);
> >
> > diff --git a/fs/ubifs/xattr.c b/fs/ubifs/xattr.c
> > index 349228dd1191..406c82eab513 100644
> > --- a/fs/ubifs/xattr.c
> > +++ b/fs/ubifs/xattr.c
> > @@ -134,7 +134,7 @@ static int create_xattr(struct ubifs_info *c, struct inode *host,
> > ui->data_len = size;
> >
> > mutex_lock(&host_ui->ui_mutex);
> > - host->i_ctime = current_time(host);
> > + inode_set_ctime_current(host);
> > host_ui->xattr_cnt += 1;
> > host_ui->xattr_size += CALC_DENT_SIZE(fname_len(nm));
> > host_ui->xattr_size += CALC_XATTR_BYTES(size);
> > @@ -215,7 +215,7 @@ static int change_xattr(struct ubifs_info *c, struct inode *host,
> > ui->data_len = size;
> >
> > mutex_lock(&host_ui->ui_mutex);
> > - host->i_ctime = current_time(host);
> > + inode_set_ctime_current(host);
> > host_ui->xattr_size -= CALC_XATTR_BYTES(old_size);
> > host_ui->xattr_size += CALC_XATTR_BYTES(size);
> >
> > @@ -474,7 +474,7 @@ static int remove_xattr(struct ubifs_info *c, struct inode *host,
> > return err;
> >
> > mutex_lock(&host_ui->ui_mutex);
> > - host->i_ctime = current_time(host);
> > + inode_set_ctime_current(host);
> > host_ui->xattr_cnt -= 1;
> > host_ui->xattr_size -= CALC_DENT_SIZE(fname_len(nm));
> > host_ui->xattr_size -= CALC_XATTR_BYTES(ui->data_len);
> >
>
--
Jeff Layton <jlayton@...nel.org>
Powered by blists - more mailing lists