linux-kernel - RE: [PATCH 08/16 v2] f2fs: add file operations

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

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-id: <009b01cdb0f0$6ad18cd0$4074a670$%kim@samsung.com>
Date:	Tue, 23 Oct 2012 16:31:29 +0900
From:	Jaegeuk Kim <jaegeuk.kim@...sung.com>
To:	'Marco Stornelli' <marco.stornelli@...il.com>
Cc:	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
	gregkh@...uxfoundation.org, viro@...iv.linux.org.uk, arnd@...db.de,
	tytso@....edu, chur.lee@...sung.com, cm224.lee@...sung.com,
	jooyoung.hwang@...sung.com
Subject: RE: [PATCH 08/16 v2] f2fs: add file operations

> > +void f2fs_truncate(struct inode *inode)
> > +{
> > +       if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
> > +                               S_ISLNK(inode->i_mode)))
> > +               return;
> > +
> > +       if (IS_APPEND(inode) || IS_IMMUTABLE(inode))
> > +               return;
> 
> No truncate for an append only file? You call f2fs_truncate from
> evict_inode, so no block freeing when this kind of inode is deleted.

Agreed.

> 
> > +
> > +       if (!truncate_blocks(inode, i_size_read(inode))) {
> > +               inode->i_mtime = inode->i_ctime = CURRENT_TIME;
> > +               mark_inode_dirty(inode);
> > +       }
> > +
> > +       f2fs_balance_fs(F2FS_SB(inode->i_sb));
> > +}
> > +
> > +static int f2fs_getattr(struct vfsmount *mnt,
> > +                        struct dentry *dentry, struct kstat *stat)
> > +{
> > +       struct inode *inode = dentry->d_inode;
> > +       generic_fillattr(inode, stat);
> > +       stat->blocks <<= 3;
> > +       return 0;
> > +}
> > +
> > +#ifdef CONFIG_F2FS_FS_POSIX_ACL
> > +static void __setattr_copy(struct inode *inode, const struct iattr *attr)
> > +{
> > +       struct f2fs_inode_info *fi = F2FS_I(inode);
> > +       unsigned int ia_valid = attr->ia_valid;
> > +
> > +       if (ia_valid & ATTR_UID)
> > +               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 = timespec_trunc(attr->ia_atime,
> > +                                               inode->i_sb->s_time_gran);
> > +       if (ia_valid & ATTR_MTIME)
> > +               inode->i_mtime = timespec_trunc(attr->ia_mtime,
> > +                                               inode->i_sb->s_time_gran);
> > +       if (ia_valid & ATTR_CTIME)
> > +               inode->i_ctime = timespec_trunc(attr->ia_ctime,
> > +                                               inode->i_sb->s_time_gran);
> > +       if (ia_valid & ATTR_MODE) {
> > +               umode_t mode = attr->ia_mode;
> > +
> > +               if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID))
> > +                       mode &= ~S_ISGID;
> > +               set_acl_inode(fi, mode);
> > +       }
> > +}
> > +#else
> > +#define __setattr_copy setattr_copy
> > +#endif
> > +
> > +int f2fs_setattr(struct dentry *dentry, struct iattr *attr)
> > +{
> > +       struct inode *inode = dentry->d_inode;
> > +       struct f2fs_inode_info *fi = F2FS_I(inode);
> > +       int err;
> > +
> > +       err = inode_change_ok(inode, attr);
> > +       if (err)
> > +               return err;
> > +
> > +       if ((attr->ia_valid & ATTR_SIZE) &&
> > +                       attr->ia_size != i_size_read(inode)) {
> > +               truncate_setsize(inode, attr->ia_size);
> > +               f2fs_truncate(inode);
> 
> No need to call truncate_pagecache & co.?

truncate_setsize() calls truncate_pagecache().
Any comment?

> 
> Marco



---
Jaegeuk Kim
Samsung

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/