1 files changed, 70 insertions, 0 deletions

diff --git a/fs/nilfs2/ioctl.c b/fs/nilfs2/ioctl.c
index 496738963fdb..3aad6413aba4 100644
--- a/fs/nilfs2/ioctl.c
+++ b/fs/nilfs2/ioctl.c
@@ -97,6 +97,70 @@ static int nilfs_ioctl_wrap_copy(struct the_nilfs *nilfs,
         return ret;
 }
 
+static int nilfs_ioctl_getflags(struct inode *inode, void __user *argp)
+{
+        unsigned int flags = NILFS_I(inode)->i_flags & FS_FL_USER_VISIBLE;
+
+        return put_user(flags, (int __user *)argp);
+}
+
+static int nilfs_ioctl_setflags(struct inode *inode, struct file *filp,
+                                void __user *argp)
+{
+        struct nilfs_transaction_info ti;
+        unsigned int flags, oldflags;
+        int ret;
+
+        if (!is_owner_or_cap(inode))
+                return -EACCES;
+
+        if (get_user(flags, (int __user *)argp))
+                return -EFAULT;
+
+        ret = mnt_want_write(filp->f_path.mnt);
+        if (ret)
+                return ret;
+
+        flags = nilfs_mask_flags(inode->i_mode, flags);
+
+        mutex_lock(&inode->i_mutex);
+
+        oldflags = NILFS_I(inode)->i_flags;
+
+        /*
+         * The IMMUTABLE and APPEND_ONLY flags can only be changed by the
+         * relevant capability.
+         */
+        ret = -EPERM;
+        if (((flags ^ oldflags) & (FS_APPEND_FL | FS_IMMUTABLE_FL)) &&
+            !capable(CAP_LINUX_IMMUTABLE))
+                goto out;
+
+        ret = nilfs_transaction_begin(inode->i_sb, &ti, 0);
+        if (ret)
+                goto out;
+
+        NILFS_I(inode)->i_flags = (oldflags & ~FS_FL_USER_MODIFIABLE) |
+                (flags & FS_FL_USER_MODIFIABLE);
+
+        nilfs_set_inode_flags(inode);
+        inode->i_ctime = CURRENT_TIME;
+        if (IS_SYNC(inode))
+                nilfs_set_transaction_flag(NILFS_TI_SYNC);
+
+        nilfs_mark_inode_dirty(inode);
+        ret = nilfs_transaction_commit(inode->i_sb);
+out:
+        mutex_unlock(&inode->i_mutex);
+        mnt_drop_write(filp->f_path.mnt);
+        return ret;
+}
+
+static int nilfs_ioctl_getversion(struct inode *inode, void __user *argp)
+{
+        return put_user(inode->i_generation, (int __user *)argp);
+}
+
 static int nilfs_ioctl_change_cpmode(struct inode *inode, struct file *filp,
                                      unsigned int cmd, void __user *argp)
 {
@@ -666,6 +730,12 @@ long nilfs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
         void __user *argp = (void __user *)arg;
 
         switch (cmd) {
+        case FS_IOC_GETFLAGS:
+                return nilfs_ioctl_getflags(inode, argp);
+        case FS_IOC_SETFLAGS:
+                return nilfs_ioctl_setflags(inode, filp, argp);
+        case FS_IOC_GETVERSION:
+                return nilfs_ioctl_getversion(inode, argp);
         case NILFS_IOCTL_CHANGE_CPMODE:
                 return nilfs_ioctl_change_cpmode(inode, filp, cmd, argp);
         case NILFS_IOCTL_DELETE_CHECKPOINT: