コード例 #1
0
ファイル: nandfs_ifile.c プロジェクト: coyizumi/cs111
int
nandfs_node_create(struct nandfsmount *nmp, struct nandfs_node **node,
    uint16_t mode)
{
	struct nandfs_alloc_request req;
	struct nandfs_device *nandfsdev;
	struct nandfs_mdt *mdt;
	struct nandfs_node *ifile;
	struct nandfs_inode *inode;
	struct vnode *vp;
	uint32_t entry;
	int error = 0;

	nandfsdev = nmp->nm_nandfsdev;
	mdt = &nandfsdev->nd_ifile_mdt;
	ifile = nmp->nm_ifile_node;
	vp = NTOV(ifile);

	VOP_LOCK(vp, LK_EXCLUSIVE);
	/* Allocate new inode in ifile */
	req.entrynum = nandfsdev->nd_last_ino + 1;
	error = nandfs_find_free_entry(mdt, ifile, &req);
	if (error) {
		VOP_UNLOCK(vp, 0);
		return (error);
	}

	error = nandfs_get_entry_block(mdt, ifile, &req, &entry, 1);
	if (error) {
		VOP_UNLOCK(vp, 0);
		return (error);
	}

	/* Inode initialization */
	inode = ((struct nandfs_inode *) req.bp_entry->b_data) + entry;
	nandfs_inode_init(inode, mode);

	error = nandfs_alloc_entry(mdt, &req);
	if (error) {
		VOP_UNLOCK(vp, 0);
		return (error);
	}

	VOP_UNLOCK(vp, 0);

	nandfsdev->nd_last_ino = req.entrynum;
	error = nandfs_get_node(nmp, req.entrynum, node);
	DPRINTF(IFILE, ("%s: node: %p ino: %#jx\n",
	    __func__, node, (uintmax_t)((*node)->nn_ino)));

	return (error);
}
コード例 #2
0
ファイル: nandfs_dat.c プロジェクト: hmatyschok/MeshBSD
int
nandfs_vblock_alloc(struct nandfs_device *nandfsdev, nandfs_daddr_t *vblock)
{
	struct nandfs_node *dat;
	struct nandfs_mdt *mdt;
	struct nandfs_alloc_request req;
	struct nandfs_dat_entry *dat_entry;
	uint64_t start;
	uint32_t entry;
	int locked, error;

	dat = nandfsdev->nd_dat_node;
	mdt = &nandfsdev->nd_dat_mdt;
	start = nandfsdev->nd_last_cno + 1;

	locked = NANDFS_VOP_ISLOCKED(NTOV(dat));
	if (!locked)
		VOP_LOCK(NTOV(dat), LK_EXCLUSIVE);
	req.entrynum = 0;

	/* Alloc vblock number */
	error = nandfs_find_free_entry(mdt, dat, &req);
	if (error) {
		nandfs_error("%s: cannot find free vblk entry\n",
		    __func__);
		if (!locked)
			VOP_UNLOCK(NTOV(dat), 0);
		return (error);
	}

	/* Read/create buffer */
	error = nandfs_get_entry_block(mdt, dat, &req, &entry, 1);
	if (error) {
		nandfs_error("%s: cannot get free vblk entry\n",
		    __func__);
		nandfs_abort_entry(&req);
		if (!locked)
			VOP_UNLOCK(NTOV(dat), 0);
		return (error);
	}

	/* Fill out vblock data */
	dat_entry = (struct nandfs_dat_entry *) req.bp_entry->b_data;
	dat_entry[entry].de_start = start;
	dat_entry[entry].de_end = UINTMAX_MAX;
	dat_entry[entry].de_blocknr = 0;

	/* Commit allocation */
	error = nandfs_alloc_entry(mdt, &req);
	if (error) {
		nandfs_error("%s: cannot get free vblk entry\n",
		    __func__);
		if (!locked)
			VOP_UNLOCK(NTOV(dat), 0);
		return (error);
	}

	/* Return allocated vblock */
	*vblock = req.entrynum;
	DPRINTF(DAT, ("%s: allocated vblock %#jx\n",
	    __func__, (uintmax_t)*vblock));

	if (!locked)
		VOP_UNLOCK(NTOV(dat), 0);
	return (error);
}