f2fs: support F2FS_IOC_FS{GET,SET}XATTR
This patch adds FS_IOC_FSSETXATTR/FS_IOC_FSGETXATTR ioctl interface support for f2fs. The interface is kept consistent with the one of ext4/xfs. Signed-off-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Chao Yu
Jaegeuk Kim
parent
b6a245eb34
commit
2c1d030569
2 changed files with 239 additions and 28 deletions
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@ -337,6 +337,9 @@ static inline bool __has_cursum_space(struct f2fs_journal *journal,
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#define F2FS_IOC32_GETVERSION FS_IOC32_GETVERSION
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#endif
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#define F2FS_IOC_FSGETXATTR FS_IOC_FSGETXATTR
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#define F2FS_IOC_FSSETXATTR FS_IOC_FSSETXATTR
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struct f2fs_gc_range {
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u32 sync;
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u64 start;
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264
fs/f2fs/file.c
264
fs/f2fs/file.c
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@ -662,7 +662,7 @@ int f2fs_getattr(const struct path *path, struct kstat *stat,
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struct f2fs_inode_info *fi = F2FS_I(inode);
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unsigned int flags;
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flags = fi->i_flags & FS_FL_USER_VISIBLE;
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flags = fi->i_flags & (FS_FL_USER_VISIBLE | FS_PROJINHERIT_FL);
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if (flags & FS_APPEND_FL)
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stat->attributes |= STATX_ATTR_APPEND;
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if (flags & FS_COMPR_FL)
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@ -1532,16 +1532,47 @@ static int f2fs_ioc_getflags(struct file *filp, unsigned long arg)
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{
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struct inode *inode = file_inode(filp);
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struct f2fs_inode_info *fi = F2FS_I(inode);
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unsigned int flags = fi->i_flags & FS_FL_USER_VISIBLE;
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unsigned int flags = fi->i_flags &
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(FS_FL_USER_VISIBLE | FS_PROJINHERIT_FL);
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return put_user(flags, (int __user *)arg);
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}
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static int __f2fs_ioc_setflags(struct inode *inode, unsigned int flags)
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{
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struct f2fs_inode_info *fi = F2FS_I(inode);
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unsigned int oldflags;
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/* Is it quota file? Do not allow user to mess with it */
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if (IS_NOQUOTA(inode))
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return -EPERM;
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flags = f2fs_mask_flags(inode->i_mode, flags);
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oldflags = fi->i_flags;
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if ((flags ^ oldflags) & (FS_APPEND_FL | FS_IMMUTABLE_FL))
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if (!capable(CAP_LINUX_IMMUTABLE))
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return -EPERM;
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flags = flags & (FS_FL_USER_MODIFIABLE | FS_PROJINHERIT_FL);
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flags |= oldflags & ~(FS_FL_USER_MODIFIABLE | FS_PROJINHERIT_FL);
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fi->i_flags = flags;
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if (fi->i_flags & FS_PROJINHERIT_FL)
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set_inode_flag(inode, FI_PROJ_INHERIT);
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else
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clear_inode_flag(inode, FI_PROJ_INHERIT);
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inode->i_ctime = current_time(inode);
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f2fs_set_inode_flags(inode);
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f2fs_mark_inode_dirty_sync(inode, false);
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return 0;
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}
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static int f2fs_ioc_setflags(struct file *filp, unsigned long arg)
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{
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struct inode *inode = file_inode(filp);
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struct f2fs_inode_info *fi = F2FS_I(inode);
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unsigned int flags;
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unsigned int oldflags;
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int ret;
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if (!inode_owner_or_capable(inode))
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@ -1556,31 +1587,8 @@ static int f2fs_ioc_setflags(struct file *filp, unsigned long arg)
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inode_lock(inode);
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/* Is it quota file? Do not allow user to mess with it */
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if (IS_NOQUOTA(inode)) {
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ret = -EPERM;
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goto unlock_out;
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}
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ret = __f2fs_ioc_setflags(inode, flags);
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flags = f2fs_mask_flags(inode->i_mode, flags);
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oldflags = fi->i_flags;
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if ((flags ^ oldflags) & (FS_APPEND_FL | FS_IMMUTABLE_FL)) {
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if (!capable(CAP_LINUX_IMMUTABLE)) {
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ret = -EPERM;
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goto unlock_out;
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}
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}
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flags = flags & FS_FL_USER_MODIFIABLE;
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flags |= oldflags & ~FS_FL_USER_MODIFIABLE;
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fi->i_flags = flags;
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inode->i_ctime = current_time(inode);
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f2fs_set_inode_flags(inode);
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f2fs_mark_inode_dirty_sync(inode, false);
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unlock_out:
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inode_unlock(inode);
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mnt_drop_write_file(filp);
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return ret;
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@ -2416,6 +2424,200 @@ static int f2fs_ioc_get_features(struct file *filp, unsigned long arg)
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return put_user(sb_feature, (u32 __user *)arg);
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}
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#ifdef CONFIG_QUOTA
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static int f2fs_ioc_setproject(struct file *filp, __u32 projid)
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{
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struct inode *inode = file_inode(filp);
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struct f2fs_inode_info *fi = F2FS_I(inode);
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struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
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struct super_block *sb = sbi->sb;
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struct dquot *transfer_to[MAXQUOTAS] = {};
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struct page *ipage;
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kprojid_t kprojid;
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int err;
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if (!f2fs_sb_has_project_quota(sb)) {
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if (projid != F2FS_DEF_PROJID)
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return -EOPNOTSUPP;
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else
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return 0;
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}
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if (!f2fs_has_extra_attr(inode))
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return -EOPNOTSUPP;
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kprojid = make_kprojid(&init_user_ns, (projid_t)projid);
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if (projid_eq(kprojid, F2FS_I(inode)->i_projid))
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return 0;
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err = mnt_want_write_file(filp);
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if (err)
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return err;
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err = -EPERM;
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inode_lock(inode);
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/* Is it quota file? Do not allow user to mess with it */
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if (IS_NOQUOTA(inode))
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goto out_unlock;
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ipage = get_node_page(sbi, inode->i_ino);
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if (IS_ERR(ipage)) {
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err = PTR_ERR(ipage);
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goto out_unlock;
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}
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if (!F2FS_FITS_IN_INODE(F2FS_INODE(ipage), fi->i_extra_isize,
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i_projid)) {
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err = -EOVERFLOW;
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f2fs_put_page(ipage, 1);
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goto out_unlock;
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}
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f2fs_put_page(ipage, 1);
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dquot_initialize(inode);
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transfer_to[PRJQUOTA] = dqget(sb, make_kqid_projid(kprojid));
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if (!IS_ERR(transfer_to[PRJQUOTA])) {
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err = __dquot_transfer(inode, transfer_to);
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dqput(transfer_to[PRJQUOTA]);
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if (err)
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goto out_dirty;
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}
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F2FS_I(inode)->i_projid = kprojid;
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inode->i_ctime = current_time(inode);
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out_dirty:
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f2fs_mark_inode_dirty_sync(inode, true);
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out_unlock:
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inode_unlock(inode);
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mnt_drop_write_file(filp);
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return err;
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}
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#else
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static int f2fs_ioc_setproject(struct file *filp, __u32 projid)
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{
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if (projid != F2FS_DEF_PROJID)
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return -EOPNOTSUPP;
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return 0;
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}
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#endif
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/* Transfer internal flags to xflags */
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static inline __u32 f2fs_iflags_to_xflags(unsigned long iflags)
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{
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__u32 xflags = 0;
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if (iflags & FS_SYNC_FL)
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xflags |= FS_XFLAG_SYNC;
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if (iflags & FS_IMMUTABLE_FL)
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xflags |= FS_XFLAG_IMMUTABLE;
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if (iflags & FS_APPEND_FL)
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xflags |= FS_XFLAG_APPEND;
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if (iflags & FS_NODUMP_FL)
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xflags |= FS_XFLAG_NODUMP;
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if (iflags & FS_NOATIME_FL)
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xflags |= FS_XFLAG_NOATIME;
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if (iflags & FS_PROJINHERIT_FL)
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xflags |= FS_XFLAG_PROJINHERIT;
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return xflags;
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}
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#define F2FS_SUPPORTED_FS_XFLAGS (FS_XFLAG_SYNC | FS_XFLAG_IMMUTABLE | \
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FS_XFLAG_APPEND | FS_XFLAG_NODUMP | \
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FS_XFLAG_NOATIME | FS_XFLAG_PROJINHERIT)
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/* Flags we can manipulate with through EXT4_IOC_FSSETXATTR */
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#define F2FS_FL_XFLAG_VISIBLE (FS_SYNC_FL | \
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FS_IMMUTABLE_FL | \
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FS_APPEND_FL | \
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FS_NODUMP_FL | \
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FS_NOATIME_FL | \
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FS_PROJINHERIT_FL)
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/* Transfer xflags flags to internal */
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static inline unsigned long f2fs_xflags_to_iflags(__u32 xflags)
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{
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unsigned long iflags = 0;
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if (xflags & FS_XFLAG_SYNC)
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iflags |= FS_SYNC_FL;
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if (xflags & FS_XFLAG_IMMUTABLE)
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iflags |= FS_IMMUTABLE_FL;
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if (xflags & FS_XFLAG_APPEND)
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iflags |= FS_APPEND_FL;
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if (xflags & FS_XFLAG_NODUMP)
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iflags |= FS_NODUMP_FL;
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if (xflags & FS_XFLAG_NOATIME)
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iflags |= FS_NOATIME_FL;
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if (xflags & FS_XFLAG_PROJINHERIT)
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iflags |= FS_PROJINHERIT_FL;
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return iflags;
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}
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static int f2fs_ioc_fsgetxattr(struct file *filp, unsigned long arg)
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{
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struct inode *inode = file_inode(filp);
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struct f2fs_inode_info *fi = F2FS_I(inode);
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struct fsxattr fa;
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memset(&fa, 0, sizeof(struct fsxattr));
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fa.fsx_xflags = f2fs_iflags_to_xflags(fi->i_flags &
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(FS_FL_USER_VISIBLE | FS_PROJINHERIT_FL));
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if (f2fs_sb_has_project_quota(inode->i_sb))
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fa.fsx_projid = (__u32)from_kprojid(&init_user_ns,
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fi->i_projid);
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if (copy_to_user((struct fsxattr __user *)arg, &fa, sizeof(fa)))
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return -EFAULT;
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return 0;
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}
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static int f2fs_ioc_fssetxattr(struct file *filp, unsigned long arg)
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{
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struct inode *inode = file_inode(filp);
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struct f2fs_inode_info *fi = F2FS_I(inode);
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struct fsxattr fa;
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unsigned int flags;
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int err;
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if (copy_from_user(&fa, (struct fsxattr __user *)arg, sizeof(fa)))
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return -EFAULT;
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/* Make sure caller has proper permission */
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if (!inode_owner_or_capable(inode))
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return -EACCES;
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if (fa.fsx_xflags & ~F2FS_SUPPORTED_FS_XFLAGS)
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return -EOPNOTSUPP;
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flags = f2fs_xflags_to_iflags(fa.fsx_xflags);
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if (f2fs_mask_flags(inode->i_mode, flags) != flags)
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return -EOPNOTSUPP;
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err = mnt_want_write_file(filp);
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if (err)
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return err;
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inode_lock(inode);
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flags = (fi->i_flags & ~F2FS_FL_XFLAG_VISIBLE) |
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(flags & F2FS_FL_XFLAG_VISIBLE);
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err = __f2fs_ioc_setflags(inode, flags);
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inode_unlock(inode);
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mnt_drop_write_file(filp);
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if (err)
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return err;
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err = f2fs_ioc_setproject(filp, fa.fsx_projid);
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if (err)
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return err;
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return 0;
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}
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long f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
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{
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switch (cmd) {
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@ -2459,6 +2661,10 @@ long f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
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return f2fs_ioc_flush_device(filp, arg);
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case F2FS_IOC_GET_FEATURES:
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return f2fs_ioc_get_features(filp, arg);
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case F2FS_IOC_FSGETXATTR:
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return f2fs_ioc_fsgetxattr(filp, arg);
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case F2FS_IOC_FSSETXATTR:
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return f2fs_ioc_fssetxattr(filp, arg);
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default:
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return -ENOTTY;
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}
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@ -2525,6 +2731,8 @@ long f2fs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
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case F2FS_IOC_MOVE_RANGE:
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case F2FS_IOC_FLUSH_DEVICE:
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case F2FS_IOC_GET_FEATURES:
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case F2FS_IOC_FSGETXATTR:
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case F2FS_IOC_FSSETXATTR:
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break;
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default:
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return -ENOIOCTLCMD;
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