Ejemplo n.º 1
0
/*
 * Create a new inode in the specified directory using the vattr to
 * figure out the type of inode.
 *
 * If no error occurs the new inode with its chain locked is returned in
 * *nipp, otherwise an error is returned and *nipp is set to NULL.
 *
 * If vap and/or cred are NULL the related fields are not set and the
 * inode type defaults to a directory.  This is used when creating PFSs
 * under the super-root, so the inode number is set to 1 in this case.
 *
 * dip is not locked on entry.
 */
hammer2_inode_t *
hammer2_inode_create(hammer2_trans_t *trans, hammer2_inode_t *dip,
		     struct vattr *vap, struct ucred *cred,
		     const uint8_t *name, size_t name_len,
		     hammer2_chain_t **chainp, int *errorp)
{
	hammer2_inode_data_t *dipdata;
	hammer2_inode_data_t *nipdata;
	hammer2_chain_t *chain;
	hammer2_chain_t *parent;
	hammer2_inode_t *nip;
	hammer2_key_t key_dummy;
	hammer2_key_t lhc;
	int error;
	uid_t xuid;
	uuid_t dip_uid;
	uuid_t dip_gid;
	uint32_t dip_mode;
	uint8_t dip_algo;
	int cache_index = -1;

	lhc = hammer2_dirhash(name, name_len);
	*errorp = 0;

	/*
	 * Locate the inode or indirect block to create the new
	 * entry in.  At the same time check for key collisions
	 * and iterate until we don't get one.
	 *
	 * NOTE: hidden inodes do not have iterators.
	 */
retry:
	parent = hammer2_inode_lock_ex(dip);
	dipdata = &dip->chain->data->ipdata;
	dip_uid = dipdata->uid;
	dip_gid = dipdata->gid;
	dip_mode = dipdata->mode;
	dip_algo = dipdata->comp_algo;

	error = 0;
	while (error == 0) {
		chain = hammer2_chain_lookup(&parent, &key_dummy,
					     lhc, lhc, &cache_index, 0);
		if (chain == NULL)
			break;
		if ((lhc & HAMMER2_DIRHASH_VISIBLE) == 0)
			error = ENOSPC;
		if ((lhc & HAMMER2_DIRHASH_LOMASK) == HAMMER2_DIRHASH_LOMASK)
			error = ENOSPC;
		hammer2_chain_unlock(chain);
		chain = NULL;
		++lhc;
	}

	if (error == 0) {
		error = hammer2_chain_create(trans, &parent, &chain,
					     lhc, 0,
					     HAMMER2_BREF_TYPE_INODE,
					     HAMMER2_INODE_BYTES);
	}

	/*
	 * Cleanup and handle retries.
	 */
	if (error == EAGAIN) {
		hammer2_chain_ref(parent);
		hammer2_inode_unlock_ex(dip, parent);
		hammer2_chain_wait(parent);
		hammer2_chain_drop(parent);
		goto retry;
	}
	hammer2_inode_unlock_ex(dip, parent);

	if (error) {
		KKASSERT(chain == NULL);
		*errorp = error;
		return (NULL);
	}

	/*
	 * Set up the new inode.
	 *
	 * NOTE: *_get() integrates chain's lock into the inode lock.
	 *
	 * NOTE: Only one new inode can currently be created per
	 *	 transaction.  If the need arises we can adjust
	 *	 hammer2_trans_init() to allow more.
	 *
	 * NOTE: nipdata will have chain's blockset data.
	 */
	chain->data->ipdata.inum = trans->inode_tid;
	nip = hammer2_inode_get(dip->pmp, dip, chain);
	nipdata = &chain->data->ipdata;

	if (vap) {
		KKASSERT(trans->inodes_created == 0);
		nipdata->type = hammer2_get_obj_type(vap->va_type);
		nipdata->inum = trans->inode_tid;
		++trans->inodes_created;

		switch (nipdata->type) {
		case HAMMER2_OBJTYPE_CDEV:
		case HAMMER2_OBJTYPE_BDEV:
			nipdata->rmajor = vap->va_rmajor;
			nipdata->rminor = vap->va_rminor;
			break;
		default:
			break;
		}
	} else {
		nipdata->type = HAMMER2_OBJTYPE_DIRECTORY;
		nipdata->inum = 1;
	}
	
	/* Inherit parent's inode compression mode. */
	nip->comp_heuristic = 0;
	nipdata->comp_algo = dip_algo;
	nipdata->version = HAMMER2_INODE_VERSION_ONE;
	hammer2_update_time(&nipdata->ctime);
	nipdata->mtime = nipdata->ctime;
	if (vap)
		nipdata->mode = vap->va_mode;
	nipdata->nlinks = 1;
	if (vap) {
		if (dip && dip->pmp) {
			xuid = hammer2_to_unix_xid(&dip_uid);
			xuid = vop_helper_create_uid(dip->pmp->mp,
						     dip_mode,
						     xuid,
						     cred,
						     &vap->va_mode);
		} else {
			/* super-root has no dip and/or pmp */
			xuid = 0;
		}
		if (vap->va_vaflags & VA_UID_UUID_VALID)
			nipdata->uid = vap->va_uid_uuid;
		else if (vap->va_uid != (uid_t)VNOVAL)
			hammer2_guid_to_uuid(&nipdata->uid, vap->va_uid);
		else
			hammer2_guid_to_uuid(&nipdata->uid, xuid);

		if (vap->va_vaflags & VA_GID_UUID_VALID)
			nipdata->gid = vap->va_gid_uuid;
		else if (vap->va_gid != (gid_t)VNOVAL)
			hammer2_guid_to_uuid(&nipdata->gid, vap->va_gid);
		else if (dip)
			nipdata->gid = dip_gid;
	}

	/*
	 * Regular files and softlinks allow a small amount of data to be
	 * directly embedded in the inode.  This flag will be cleared if
	 * the size is extended past the embedded limit.
	 */
	if (nipdata->type == HAMMER2_OBJTYPE_REGFILE ||
	    nipdata->type == HAMMER2_OBJTYPE_SOFTLINK) {
		nipdata->op_flags |= HAMMER2_OPFLAG_DIRECTDATA;
	}

	KKASSERT(name_len < HAMMER2_INODE_MAXNAME);
	bcopy(name, nipdata->filename, name_len);
	nipdata->name_key = lhc;
	nipdata->name_len = name_len;
	*chainp = chain;

	return (nip);
}
Ejemplo n.º 2
0
/*
 * Create a new, normal inode.  This function will create the inode,
 * the media chains, but will not insert the chains onto the media topology
 * (doing so would require a flush transaction and cause long stalls).
 *
 * Caller must be in a normal transaction.
 */
hammer2_inode_t *
hammer2_inode_create_normal(hammer2_inode_t *pip,
			    struct vattr *vap, struct ucred *cred,
			    hammer2_key_t inum, int *errorp)
{
	hammer2_xop_create_t *xop;
	hammer2_inode_t *dip;
	hammer2_inode_t *nip;
	int error;
	uid_t xuid;
	uuid_t pip_uid;
	uuid_t pip_gid;
	uint32_t pip_mode;
	uint8_t pip_comp_algo;
	uint8_t pip_check_algo;
	hammer2_tid_t pip_inum;
	uint8_t type;

	dip = pip->pmp->iroot;
	KKASSERT(dip != NULL);

	*errorp = 0;

	/*hammer2_inode_lock(dip, 0);*/

	pip_uid = pip->meta.uid;
	pip_gid = pip->meta.gid;
	pip_mode = pip->meta.mode;
	pip_comp_algo = pip->meta.comp_algo;
	pip_check_algo = pip->meta.check_algo;
	pip_inum = (pip == pip->pmp->iroot) ? 1 : pip->meta.inum;

	/*
	 * Create the in-memory hammer2_inode structure for the specified
	 * inode.
	 */
	nip = hammer2_inode_get(dip->pmp, NULL, inum, -1);
	nip->comp_heuristic = 0;
	KKASSERT((nip->flags & HAMMER2_INODE_CREATING) == 0 &&
		 nip->cluster.nchains == 0);
	atomic_set_int(&nip->flags, HAMMER2_INODE_CREATING);

	/*
	 * Setup the inode meta-data
	 */
	nip->meta.type = hammer2_get_obj_type(vap->va_type);

	switch (nip->meta.type) {
	case HAMMER2_OBJTYPE_CDEV:
	case HAMMER2_OBJTYPE_BDEV:
		nip->meta.rmajor = vap->va_rmajor;
		nip->meta.rminor = vap->va_rminor;
		break;
	default:
		break;
	}
	type = nip->meta.type;

	KKASSERT(nip->meta.inum == inum);
	nip->meta.iparent = pip_inum;
	
	/* Inherit parent's inode compression mode. */
	nip->meta.comp_algo = pip_comp_algo;
	nip->meta.check_algo = pip_check_algo;
	nip->meta.version = HAMMER2_INODE_VERSION_ONE;
	hammer2_update_time(&nip->meta.ctime);
	nip->meta.mtime = nip->meta.ctime;
	nip->meta.mode = vap->va_mode;
	nip->meta.nlinks = 1;

	xuid = hammer2_to_unix_xid(&pip_uid);
	xuid = vop_helper_create_uid(dip->pmp->mp, pip_mode,
				     xuid, cred,
				     &vap->va_mode);
	if (vap->va_vaflags & VA_UID_UUID_VALID)
		nip->meta.uid = vap->va_uid_uuid;
	else if (vap->va_uid != (uid_t)VNOVAL)
		hammer2_guid_to_uuid(&nip->meta.uid, vap->va_uid);
	else
		hammer2_guid_to_uuid(&nip->meta.uid, xuid);

	if (vap->va_vaflags & VA_GID_UUID_VALID)
		nip->meta.gid = vap->va_gid_uuid;
	else if (vap->va_gid != (gid_t)VNOVAL)
		hammer2_guid_to_uuid(&nip->meta.gid, vap->va_gid);
	else
		nip->meta.gid = pip_gid;

	/*
	 * Regular files and softlinks allow a small amount of data to be
	 * directly embedded in the inode.  This flag will be cleared if
	 * the size is extended past the embedded limit.
	 */
	if (nip->meta.type == HAMMER2_OBJTYPE_REGFILE ||
	    nip->meta.type == HAMMER2_OBJTYPE_SOFTLINK) {
		nip->meta.op_flags |= HAMMER2_OPFLAG_DIRECTDATA;
	}

	/*
	 * Create the inode using (inum) as the key.  Pass pip for
	 * method inheritance.
	 */
	xop = hammer2_xop_alloc(pip, HAMMER2_XOP_MODIFYING);
	xop->lhc = inum;
	xop->flags = 0;
	xop->meta = nip->meta;
	KKASSERT(vap);

	xop->meta.name_len = hammer2_xop_setname_inum(&xop->head, inum);
	xop->meta.name_key = inum;
	nip->meta.name_len = xop->meta.name_len;
	nip->meta.name_key = xop->meta.name_key;
	hammer2_inode_modify(nip);

	/*
	 * Create the inode media chains but leave them detached.  We are
	 * not in a flush transaction so we can't mess with media topology
	 * above normal inodes (i.e. the index of the inodes themselves).
	 *
	 * We've already set the INODE_CREATING flag.  The inode's media
	 * chains will be inserted onto the media topology on the next
	 * filesystem sync.
	 */
	hammer2_xop_start(&xop->head, &hammer2_inode_create_det_desc);

	error = hammer2_xop_collect(&xop->head, 0);
#if INODE_DEBUG
	kprintf("create inode type %d error %d\n", nip->meta.type, error);
#endif

	if (error) {
		*errorp = error;
		goto done;
	}

	/*
	 * Associate the media chains created by the backend with the
	 * frontend inode.
	 */
	hammer2_inode_repoint(nip, NULL, &xop->head.cluster);
done:
	hammer2_xop_retire(&xop->head, HAMMER2_XOPMASK_VOP);
	/*hammer2_inode_unlock(dip);*/

	return (nip);
}
Ejemplo n.º 3
0
/*
 * Create a PFS inode under the superroot.  This function will create the
 * inode, its media chains, and also insert it into the media.
 *
 * Caller must be in a flush transaction because we are inserting the inode
 * onto the media.
 */
hammer2_inode_t *
hammer2_inode_create_pfs(hammer2_pfs_t *spmp,
		     const uint8_t *name, size_t name_len,
		     int *errorp)
{
	hammer2_xop_create_t *xop;
	hammer2_inode_t *pip;
	hammer2_inode_t *nip;
	int error;
	uuid_t pip_uid;
	uuid_t pip_gid;
	uint32_t pip_mode;
	uint8_t pip_comp_algo;
	uint8_t pip_check_algo;
	hammer2_tid_t pip_inum;
	hammer2_key_t lhc;

	pip = spmp->iroot;
	nip = NULL;

	lhc = hammer2_dirhash(name, name_len);
	*errorp = 0;

	/*
	 * Locate the inode or indirect block to create the new
	 * entry in.  At the same time check for key collisions
	 * and iterate until we don't get one.
	 *
	 * Lock the directory exclusively for now to guarantee that
	 * we can find an unused lhc for the name.  Due to collisions,
	 * two different creates can end up with the same lhc so we
	 * cannot depend on the OS to prevent the collision.
	 */
	hammer2_inode_lock(pip, 0);

	pip_uid = pip->meta.uid;
	pip_gid = pip->meta.gid;
	pip_mode = pip->meta.mode;
	pip_comp_algo = pip->meta.comp_algo;
	pip_check_algo = pip->meta.check_algo;
	pip_inum = (pip == pip->pmp->iroot) ? 1 : pip->meta.inum;

	/*
	 * Locate an unused key in the collision space.
	 */
	{
		hammer2_xop_scanlhc_t *sxop;
		hammer2_key_t lhcbase;

		lhcbase = lhc;
		sxop = hammer2_xop_alloc(pip, HAMMER2_XOP_MODIFYING);
		sxop->lhc = lhc;
		hammer2_xop_start(&sxop->head, &hammer2_scanlhc_desc);
		while ((error = hammer2_xop_collect(&sxop->head, 0)) == 0) {
			if (lhc != sxop->head.cluster.focus->bref.key)
				break;
			++lhc;
		}
		hammer2_xop_retire(&sxop->head, HAMMER2_XOPMASK_VOP);

		if (error) {
			if (error != HAMMER2_ERROR_ENOENT)
				goto done2;
			++lhc;
			error = 0;
		}
		if ((lhcbase ^ lhc) & ~HAMMER2_DIRHASH_LOMASK) {
			error = HAMMER2_ERROR_ENOSPC;
			goto done2;
		}
	}

	/*
	 * Create the inode with the lhc as the key.
	 */
	xop = hammer2_xop_alloc(pip, HAMMER2_XOP_MODIFYING);
	xop->lhc = lhc;
	xop->flags = HAMMER2_INSERT_PFSROOT;
	bzero(&xop->meta, sizeof(xop->meta));

	xop->meta.type = HAMMER2_OBJTYPE_DIRECTORY;
	xop->meta.inum = 1;
	xop->meta.iparent = pip_inum;

	/* Inherit parent's inode compression mode. */
	xop->meta.comp_algo = pip_comp_algo;
	xop->meta.check_algo = pip_check_algo;
	xop->meta.version = HAMMER2_INODE_VERSION_ONE;
	hammer2_update_time(&xop->meta.ctime);
	xop->meta.mtime = xop->meta.ctime;
	xop->meta.mode = 0755;
	xop->meta.nlinks = 1;

	/*
	 * Regular files and softlinks allow a small amount of data to be
	 * directly embedded in the inode.  This flag will be cleared if
	 * the size is extended past the embedded limit.
	 */
	if (xop->meta.type == HAMMER2_OBJTYPE_REGFILE ||
	    xop->meta.type == HAMMER2_OBJTYPE_SOFTLINK) {
		xop->meta.op_flags |= HAMMER2_OPFLAG_DIRECTDATA;
	}
	hammer2_xop_setname(&xop->head, name, name_len);
	xop->meta.name_len = name_len;
	xop->meta.name_key = lhc;
	KKASSERT(name_len < HAMMER2_INODE_MAXNAME);

	hammer2_xop_start(&xop->head, &hammer2_inode_create_desc);

	error = hammer2_xop_collect(&xop->head, 0);
#if INODE_DEBUG
	kprintf("CREATE INODE %*.*s\n",
		(int)name_len, (int)name_len, name);
#endif

	if (error) {
		*errorp = error;
		goto done;
	}

	/*
	 * Set up the new inode if not a hardlink pointer.
	 *
	 * NOTE: *_get() integrates chain's lock into the inode lock.
	 *
	 * NOTE: Only one new inode can currently be created per
	 *	 transaction.  If the need arises we can adjust
	 *	 hammer2_trans_init() to allow more.
	 *
	 * NOTE: nipdata will have chain's blockset data.
	 */
	nip = hammer2_inode_get(pip->pmp, &xop->head, -1, -1);
	nip->comp_heuristic = 0;
done:
	hammer2_xop_retire(&xop->head, HAMMER2_XOPMASK_VOP);
done2:
	hammer2_inode_unlock(pip);

	return (nip);
}
Ejemplo n.º 4
0
/*
 * Create a new inode in the specified directory using the vattr to
 * figure out the type of inode.
 *
 * If no error occurs the new inode with its chain locked is returned in
 * *nipp, otherwise an error is returned and *nipp is set to NULL.
 *
 * If vap and/or cred are NULL the related fields are not set and the
 * inode type defaults to a directory.  This is used when creating PFSs
 * under the super-root, so the inode number is set to 1 in this case.
 */
int
hammer2_inode_create(hammer2_inode_t *dip,
		     struct vattr *vap, struct ucred *cred,
		     const uint8_t *name, size_t name_len,
		     hammer2_inode_t **nipp)
{
	hammer2_mount_t *hmp = dip->hmp;
	hammer2_chain_t *chain;
	hammer2_chain_t *parent;
	hammer2_inode_t *nip;
	hammer2_key_t lhc;
	int error;
	uid_t xuid;

	lhc = hammer2_dirhash(name, name_len);

	/*
	 * Locate the inode or indirect block to create the new
	 * entry in.  At the same time check for key collisions
	 * and iterate until we don't get one.
	 */
	parent = &dip->chain;
	hammer2_chain_lock(hmp, parent, HAMMER2_RESOLVE_ALWAYS);

	error = 0;
	while (error == 0) {
		chain = hammer2_chain_lookup(hmp, &parent, lhc, lhc, 0);
		if (chain == NULL)
			break;
		if ((lhc & HAMMER2_DIRHASH_VISIBLE) == 0)
			error = ENOSPC;
		if ((lhc & HAMMER2_DIRHASH_LOMASK) == HAMMER2_DIRHASH_LOMASK)
			error = ENOSPC;
		hammer2_chain_unlock(hmp, chain);
		chain = NULL;
		++lhc;
	}
	if (error == 0) {
		chain = hammer2_chain_create(hmp, parent, NULL, lhc, 0,
					     HAMMER2_BREF_TYPE_INODE,
					     HAMMER2_INODE_BYTES);
		if (chain == NULL)
			error = EIO;
	}
	hammer2_chain_unlock(hmp, parent);

	/*
	 * Handle the error case
	 */
	if (error) {
		KKASSERT(chain == NULL);
		*nipp = NULL;
		return (error);
	}

	/*
	 * Set up the new inode
	 */
	nip = chain->u.ip;
	*nipp = nip;

	hammer2_voldata_lock(hmp);
	if (vap) {
		nip->ip_data.type = hammer2_get_obj_type(vap->va_type);
		nip->ip_data.inum = hmp->voldata.alloc_tid++;
		/* XXX modify/lock */
	} else {
		nip->ip_data.type = HAMMER2_OBJTYPE_DIRECTORY;
		nip->ip_data.inum = 1;
	}
	hammer2_voldata_unlock(hmp);
	nip->ip_data.version = HAMMER2_INODE_VERSION_ONE;
	hammer2_update_time(&nip->ip_data.ctime);
	nip->ip_data.mtime = nip->ip_data.ctime;
	if (vap)
		nip->ip_data.mode = vap->va_mode;
	nip->ip_data.nlinks = 1;
	if (vap) {
		if (dip) {
			xuid = hammer2_to_unix_xid(&dip->ip_data.uid);
			xuid = vop_helper_create_uid(dip->pmp->mp,
						     dip->ip_data.mode,
						     xuid,
						     cred,
						     &vap->va_mode);
		} else {
			xuid = 0;
		}
/* XXX
		if (vap->va_vaflags & VA_UID_UUID_VALID)
			nip->ip_data.uid = vap->va_uid_uuid;
		else if (vap->va_uid != (uid_t)VNOVAL)
			hammer2_guid_to_uuid(&nip->ip_data.uid, vap->va_uid);
		else
		*/
			hammer2_guid_to_uuid(&nip->ip_data.uid, xuid);

		/* XXX if (vap->va_vaflags & VA_GID_UUID_VALID)
			nip->ip_data.gid = vap->va_gid_uuid;
		else if (vap->va_gid != (gid_t)VNOVAL)
			hammer2_guid_to_uuid(&nip->ip_data.gid, vap->va_gid);
		else */ if (dip)
			nip->ip_data.gid = dip->ip_data.gid;
	}

	/*
	 * Regular files and softlinks allow a small amount of data to be
	 * directly embedded in the inode.  This flag will be cleared if
	 * the size is extended past the embedded limit.
	 */
	if (nip->ip_data.type == HAMMER2_OBJTYPE_REGFILE ||
	    nip->ip_data.type == HAMMER2_OBJTYPE_SOFTLINK) {
		nip->ip_data.op_flags |= HAMMER2_OPFLAG_DIRECTDATA;
	}

	KKASSERT(name_len < HAMMER2_INODE_MAXNAME);
	bcopy(name, nip->ip_data.filename, name_len);
	nip->ip_data.name_key = lhc;
	nip->ip_data.name_len = name_len;

	return (0);
}