Beispiel #1
0
static int v9fs_get_sb(struct file_system_type *fs_type, int flags,
		       const char *dev_name, void *data,
		       struct vfsmount *mnt)
{
	struct super_block *sb = NULL;
	struct inode *inode = NULL;
	struct dentry *root = NULL;
	struct v9fs_session_info *v9ses = NULL;
	int mode = S_IRWXUGO | S_ISVTX;
	struct p9_fid *fid;
	int retval = 0;

	P9_DPRINTK(P9_DEBUG_VFS, " \n");

	v9ses = kzalloc(sizeof(struct v9fs_session_info), GFP_KERNEL);
	if (!v9ses)
		return -ENOMEM;

	fid = v9fs_session_init(v9ses, dev_name, data);
	if (IS_ERR(fid)) {
		retval = PTR_ERR(fid);
		/*
		 * we need to call session_close to tear down some
		 * of the data structure setup by session_init
		 */
		goto close_session;
	}

	sb = sget(fs_type, NULL, v9fs_set_super, v9ses);
	if (IS_ERR(sb)) {
		retval = PTR_ERR(sb);
		goto clunk_fid;
	}
	v9fs_fill_super(sb, v9ses, flags, data);

	inode = v9fs_get_inode(sb, S_IFDIR | mode);
	if (IS_ERR(inode)) {
		retval = PTR_ERR(inode);
		goto release_sb;
	}

	root = d_alloc_root(inode);
	if (!root) {
		iput(inode);
		retval = -ENOMEM;
		goto release_sb;
	}
	sb->s_root = root;
	if (v9fs_proto_dotl(v9ses)) {
		struct p9_stat_dotl *st = NULL;
		st = p9_client_getattr_dotl(fid, P9_STATS_BASIC);
		if (IS_ERR(st)) {
			retval = PTR_ERR(st);
			goto release_sb;
		}

		v9fs_stat2inode_dotl(st, root->d_inode);
		kfree(st);
	} else {
		struct p9_wstat *st = NULL;
		st = p9_client_stat(fid);
		if (IS_ERR(st)) {
			retval = PTR_ERR(st);
			goto release_sb;
		}

		root->d_inode->i_ino = v9fs_qid2ino(&st->qid);
		v9fs_stat2inode(st, root->d_inode, sb);

		p9stat_free(st);
		kfree(st);
	}
	retval = v9fs_get_acl(inode, fid);
	if (retval)
		goto release_sb;
	v9fs_fid_add(root, fid);

	P9_DPRINTK(P9_DEBUG_VFS, " simple set mount, return 0\n");
	simple_set_mnt(mnt, sb);
	return 0;

clunk_fid:
	p9_client_clunk(fid);
close_session:
	v9fs_session_close(v9ses);
	kfree(v9ses);
	return retval;
release_sb:
	/*
	 * we will do the session_close and root dentry release
	 * in the below call. But we need to clunk fid, because we haven't
	 * attached the fid to dentry so it won't get clunked
	 * automatically.
	 */
	p9_client_clunk(fid);
	deactivate_locked_super(sb);
	return retval;
}
Beispiel #2
0
static int v9fs_get_sb(struct file_system_type *fs_type, int flags,
		       const char *dev_name, void *data,
		       struct vfsmount *mnt)
{
	struct super_block *sb = NULL;
	struct inode *inode = NULL;
	struct dentry *root = NULL;
	struct v9fs_session_info *v9ses = NULL;
	struct p9_stat *st = NULL;
	int mode = S_IRWXUGO | S_ISVTX;
	uid_t uid = current->fsuid;
	gid_t gid = current->fsgid;
	struct p9_fid *fid;
	int retval = 0;

	P9_DPRINTK(P9_DEBUG_VFS, " \n");

	st = NULL;
	v9ses = kzalloc(sizeof(struct v9fs_session_info), GFP_KERNEL);
	if (!v9ses)
		return -ENOMEM;

	fid = v9fs_session_init(v9ses, dev_name, data);
	if (IS_ERR(fid)) {
		retval = PTR_ERR(fid);
		fid = NULL;
		kfree(v9ses);
		v9ses = NULL;
		goto error;
	}

	st = p9_client_stat(fid);
	if (IS_ERR(st)) {
		retval = PTR_ERR(st);
		goto error;
	}

	sb = sget(fs_type, NULL, v9fs_set_super, v9ses);
	if (IS_ERR(sb)) {
		retval = PTR_ERR(sb);
		goto error;
	}
	v9fs_fill_super(sb, v9ses, flags);

	inode = v9fs_get_inode(sb, S_IFDIR | mode);
	if (IS_ERR(inode)) {
		retval = PTR_ERR(inode);
		goto error;
	}

	inode->i_uid = uid;
	inode->i_gid = gid;

	root = d_alloc_root(inode);
	if (!root) {
		retval = -ENOMEM;
		goto error;
	}

	sb->s_root = root;
	root->d_inode->i_ino = v9fs_qid2ino(&st->qid);
	v9fs_stat2inode(st, root->d_inode, sb);
	v9fs_fid_add(root, fid);
	kfree(st);

	return simple_set_mnt(mnt, sb);

error:
	kfree(st);
	if (fid)
		p9_client_clunk(fid);

	if (v9ses) {
		v9fs_session_close(v9ses);
		kfree(v9ses);
	}

	if (sb) {
		up_write(&sb->s_umount);
		deactivate_super(sb);
	}

	return retval;
}
Beispiel #3
0
static struct dentry *v9fs_mount(struct file_system_type *fs_type, int flags,
		       const char *dev_name, void *data)
{
	struct super_block *sb = NULL;
	struct inode *inode = NULL;
	struct dentry *root = NULL;
	struct v9fs_session_info *v9ses = NULL;
	umode_t mode = S_IRWXUGO | S_ISVTX;
	struct p9_fid *fid;
	int retval = 0;

	p9_debug(P9_DEBUG_VFS, "\n");

	v9ses = kzalloc(sizeof(struct v9fs_session_info), GFP_KERNEL);
	if (!v9ses)
		return ERR_PTR(-ENOMEM);

	fid = v9fs_session_init(v9ses, dev_name, data);
	if (IS_ERR(fid)) {
		retval = PTR_ERR(fid);
		goto free_session;
	}

	sb = sget(fs_type, NULL, v9fs_set_super, flags, v9ses);
	if (IS_ERR(sb)) {
		retval = PTR_ERR(sb);
		goto clunk_fid;
	}
	v9fs_fill_super(sb, v9ses, flags, data);

	if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE)
		sb->s_d_op = &v9fs_cached_dentry_operations;
	else
		sb->s_d_op = &v9fs_dentry_operations;

	inode = v9fs_get_inode(sb, S_IFDIR | mode, 0);
	if (IS_ERR(inode)) {
		retval = PTR_ERR(inode);
		goto release_sb;
	}

	root = d_make_root(inode);
	if (!root) {
		retval = -ENOMEM;
		goto release_sb;
	}
	sb->s_root = root;
	if (v9fs_proto_dotl(v9ses)) {
		struct p9_stat_dotl *st = NULL;
		st = p9_client_getattr_dotl(fid, P9_STATS_BASIC);
		if (IS_ERR(st)) {
			retval = PTR_ERR(st);
			goto release_sb;
		}
		d_inode(root)->i_ino = v9fs_qid2ino(&st->qid);
		v9fs_stat2inode_dotl(st, d_inode(root));
		kfree(st);
	} else {
		struct p9_wstat *st = NULL;
		st = p9_client_stat(fid);
		if (IS_ERR(st)) {
			retval = PTR_ERR(st);
			goto release_sb;
		}

		d_inode(root)->i_ino = v9fs_qid2ino(&st->qid);
		v9fs_stat2inode(st, d_inode(root), sb);

		p9stat_free(st);
		kfree(st);
	}
	retval = v9fs_get_acl(inode, fid);
	if (retval)
		goto release_sb;
	v9fs_fid_add(root, fid);

	p9_debug(P9_DEBUG_VFS, " simple set mount, return 0\n");
	return dget(sb->s_root);

clunk_fid:
	p9_client_clunk(fid);
	v9fs_session_close(v9ses);
free_session:
	kfree(v9ses);
	return ERR_PTR(retval);

release_sb:
	/*
	 * we will do the session_close and root dentry release
	 * in the below call. But we need to clunk fid, because we haven't
	 * attached the fid to dentry so it won't get clunked
	 * automatically.
	 */
	p9_client_clunk(fid);
	deactivate_locked_super(sb);
	return ERR_PTR(retval);
}