Exemple #1
0
/*
 * ZFS_IOC_CREATE callback handles dmu zvol and zap object creation.
 */
void
zvol_create_cb(objset_t *os, void *arg, cred_t *cr, dmu_tx_t *tx)
{
	zfs_creat_t *zct = arg;
	nvlist_t *nvprops = zct->zct_props;
	int error;
	uint64_t volblocksize, volsize;

	VERIFY(nvlist_lookup_uint64(nvprops,
	    zfs_prop_to_name(ZFS_PROP_VOLSIZE), &volsize) == 0);
	if (nvlist_lookup_uint64(nvprops,
	    zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE), &volblocksize) != 0)
		volblocksize = zfs_prop_default_numeric(ZFS_PROP_VOLBLOCKSIZE);

	/*
	 * These properties must be removed from the list so the generic
	 * property setting step won't apply to them.
	 */
	VERIFY(nvlist_remove_all(nvprops,
	    zfs_prop_to_name(ZFS_PROP_VOLSIZE)) == 0);
	(void) nvlist_remove_all(nvprops,
	    zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE));

	error = dmu_object_claim(os, ZVOL_OBJ, DMU_OT_ZVOL, volblocksize,
	    DMU_OT_NONE, 0, tx);
	ASSERT(error == 0);

	error = zap_create_claim(os, ZVOL_ZAP_OBJ, DMU_OT_ZVOL_PROP,
	    DMU_OT_NONE, 0, tx);
	ASSERT(error == 0);

	error = zap_update(os, ZVOL_ZAP_OBJ, "size", 8, 1, &volsize, tx);
	ASSERT(error == 0);
}
Exemple #2
0
void
zvol_create_cb(objset_t *os, void *arg, dmu_tx_t *tx)
{
	zfs_cmd_t *zc = arg;
	int error;

	error = dmu_object_claim(os, ZVOL_OBJ, DMU_OT_ZVOL, zc->zc_volblocksize,
	    DMU_OT_NONE, 0, tx);
	ASSERT(error == 0);

	error = zap_create_claim(os, ZVOL_ZAP_OBJ, DMU_OT_ZVOL_PROP,
	    DMU_OT_NONE, 0, tx);
	ASSERT(error == 0);

	error = zap_update(os, ZVOL_ZAP_OBJ, "size", 8, 1, &zc->zc_volsize, tx);
	ASSERT(error == 0);
}
Exemple #3
0
/*
 * Create a new DMU object to hold a zfs znode.
 *
 *	IN:	dzp	- parent directory for new znode
 *		vap	- file attributes for new znode
 *		tx	- dmu transaction id for zap operations
 *		cr	- credentials of caller
 *		flag	- flags:
 *			  IS_ROOT_NODE	- new object will be root
 *			  IS_XATTR	- new object is an attribute
 *		bonuslen - length of bonus buffer
 *		setaclp  - File/Dir initial ACL
 *		fuidp	 - Tracks fuid allocation.
 *
 *	OUT:	zpp	- allocated znode
 *
 */
void
zfs_mknode(znode_t *dzp, vattr_t *vap, dmu_tx_t *tx, cred_t *cr,
    uint_t flag, znode_t **zpp, zfs_acl_ids_t *acl_ids)
{
	uint64_t	crtime[2], atime[2], mtime[2], ctime[2];
	uint64_t	mode, size, links, parent, pflags;
	uint64_t	dzp_pflags = 0;
	uint64_t	rdev = 0;
	zfs_sb_t	*zsb = ZTOZSB(dzp);
	dmu_buf_t	*db;
	timestruc_t	now;
	uint64_t	gen, obj;
	int		bonuslen;
	sa_handle_t	*sa_hdl;
	dmu_object_type_t obj_type;
	sa_bulk_attr_t	*sa_attrs;
	int		cnt = 0;
	zfs_acl_locator_cb_t locate = { 0 };

	if (zsb->z_replay) {
		obj = vap->va_nodeid;
		now = vap->va_ctime;		/* see zfs_replay_create() */
		gen = vap->va_nblocks;		/* ditto */
	} else {
		obj = 0;
		gethrestime(&now);
		gen = dmu_tx_get_txg(tx);
	}

	obj_type = zsb->z_use_sa ? DMU_OT_SA : DMU_OT_ZNODE;
	bonuslen = (obj_type == DMU_OT_SA) ?
	    DN_MAX_BONUSLEN : ZFS_OLD_ZNODE_PHYS_SIZE;

	/*
	 * Create a new DMU object.
	 */
	/*
	 * There's currently no mechanism for pre-reading the blocks that will
	 * be needed to allocate a new object, so we accept the small chance
	 * that there will be an i/o error and we will fail one of the
	 * assertions below.
	 */
	if (S_ISDIR(vap->va_mode)) {
		if (zsb->z_replay) {
			VERIFY0(zap_create_claim_norm(zsb->z_os, obj,
			    zsb->z_norm, DMU_OT_DIRECTORY_CONTENTS,
			    obj_type, bonuslen, tx));
		} else {
			obj = zap_create_norm(zsb->z_os,
			    zsb->z_norm, DMU_OT_DIRECTORY_CONTENTS,
			    obj_type, bonuslen, tx);
		}
	} else {
		if (zsb->z_replay) {
			VERIFY0(dmu_object_claim(zsb->z_os, obj,
			    DMU_OT_PLAIN_FILE_CONTENTS, 0,
			    obj_type, bonuslen, tx));
		} else {
			obj = dmu_object_alloc(zsb->z_os,
			    DMU_OT_PLAIN_FILE_CONTENTS, 0,
			    obj_type, bonuslen, tx);
		}
	}

	ZFS_OBJ_HOLD_ENTER(zsb, obj);
	VERIFY(0 == sa_buf_hold(zsb->z_os, obj, NULL, &db));

	/*
	 * If this is the root, fix up the half-initialized parent pointer
	 * to reference the just-allocated physical data area.
	 */
	if (flag & IS_ROOT_NODE) {
		dzp->z_id = obj;
	} else {
		dzp_pflags = dzp->z_pflags;
	}

	/*
	 * If parent is an xattr, so am I.
	 */
	if (dzp_pflags & ZFS_XATTR) {
		flag |= IS_XATTR;
	}

	if (zsb->z_use_fuids)
		pflags = ZFS_ARCHIVE | ZFS_AV_MODIFIED;
	else
		pflags = 0;

	if (S_ISDIR(vap->va_mode)) {
		size = 2;		/* contents ("." and "..") */
		links = (flag & (IS_ROOT_NODE | IS_XATTR)) ? 2 : 1;
	} else {
		size = links = 0;
	}

	if (S_ISBLK(vap->va_mode) || S_ISCHR(vap->va_mode))
		rdev = vap->va_rdev;

	parent = dzp->z_id;
	mode = acl_ids->z_mode;
	if (flag & IS_XATTR)
		pflags |= ZFS_XATTR;

	/*
	 * No execs denied will be deterimed when zfs_mode_compute() is called.
	 */
	pflags |= acl_ids->z_aclp->z_hints &
	    (ZFS_ACL_TRIVIAL|ZFS_INHERIT_ACE|ZFS_ACL_AUTO_INHERIT|
	    ZFS_ACL_DEFAULTED|ZFS_ACL_PROTECTED);

	ZFS_TIME_ENCODE(&now, crtime);
	ZFS_TIME_ENCODE(&now, ctime);

	if (vap->va_mask & ATTR_ATIME) {
		ZFS_TIME_ENCODE(&vap->va_atime, atime);
	} else {
		ZFS_TIME_ENCODE(&now, atime);
	}

	if (vap->va_mask & ATTR_MTIME) {
		ZFS_TIME_ENCODE(&vap->va_mtime, mtime);
	} else {
		ZFS_TIME_ENCODE(&now, mtime);
	}

	/* Now add in all of the "SA" attributes */
	VERIFY(0 == sa_handle_get_from_db(zsb->z_os, db, NULL, SA_HDL_SHARED,
	    &sa_hdl));

	/*
	 * Setup the array of attributes to be replaced/set on the new file
	 *
	 * order for  DMU_OT_ZNODE is critical since it needs to be constructed
	 * in the old znode_phys_t format.  Don't change this ordering
	 */
	sa_attrs = kmem_alloc(sizeof (sa_bulk_attr_t) * ZPL_END, KM_SLEEP);

	if (obj_type == DMU_OT_ZNODE) {
		SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_ATIME(zsb),
		    NULL, &atime, 16);
		SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_MTIME(zsb),
		    NULL, &mtime, 16);
		SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_CTIME(zsb),
		    NULL, &ctime, 16);
		SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_CRTIME(zsb),
		    NULL, &crtime, 16);
		SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_GEN(zsb),
		    NULL, &gen, 8);
		SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_MODE(zsb),
		    NULL, &mode, 8);
		SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_SIZE(zsb),
		    NULL, &size, 8);
		SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_PARENT(zsb),
		    NULL, &parent, 8);
	} else {
		SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_MODE(zsb),
		    NULL, &mode, 8);
		SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_SIZE(zsb),
		    NULL, &size, 8);
		SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_GEN(zsb),
		    NULL, &gen, 8);
		SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_UID(zsb),
		    NULL, &acl_ids->z_fuid, 8);
		SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_GID(zsb),
		    NULL, &acl_ids->z_fgid, 8);
		SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_PARENT(zsb),
		    NULL, &parent, 8);
		SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_FLAGS(zsb),
		    NULL, &pflags, 8);
		SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_ATIME(zsb),
		    NULL, &atime, 16);
		SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_MTIME(zsb),
		    NULL, &mtime, 16);
		SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_CTIME(zsb),
		    NULL, &ctime, 16);
		SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_CRTIME(zsb),
		    NULL, &crtime, 16);
	}

	SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_LINKS(zsb), NULL, &links, 8);

	if (obj_type == DMU_OT_ZNODE) {
		SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_XATTR(zsb), NULL,
		    &empty_xattr, 8);
	}
	if (obj_type == DMU_OT_ZNODE ||
	    (S_ISBLK(vap->va_mode) || S_ISCHR(vap->va_mode))) {
		SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_RDEV(zsb),
		    NULL, &rdev, 8);
	}
	if (obj_type == DMU_OT_ZNODE) {
		SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_FLAGS(zsb),
		    NULL, &pflags, 8);
		SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_UID(zsb), NULL,
		    &acl_ids->z_fuid, 8);
		SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_GID(zsb), NULL,
		    &acl_ids->z_fgid, 8);
		SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_PAD(zsb), NULL, pad,
		    sizeof (uint64_t) * 4);
		SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_ZNODE_ACL(zsb), NULL,
		    &acl_phys, sizeof (zfs_acl_phys_t));
	} else if (acl_ids->z_aclp->z_version >= ZFS_ACL_VERSION_FUID) {
		SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_DACL_COUNT(zsb), NULL,
		    &acl_ids->z_aclp->z_acl_count, 8);
		locate.cb_aclp = acl_ids->z_aclp;
		SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_DACL_ACES(zsb),
		    zfs_acl_data_locator, &locate,
		    acl_ids->z_aclp->z_acl_bytes);
		mode = zfs_mode_compute(mode, acl_ids->z_aclp, &pflags,
		    acl_ids->z_fuid, acl_ids->z_fgid);
	}

	VERIFY(sa_replace_all_by_template(sa_hdl, sa_attrs, cnt, tx) == 0);

	if (!(flag & IS_ROOT_NODE)) {
		*zpp = zfs_znode_alloc(zsb, db, 0, obj_type, obj, sa_hdl,
		    ZTOI(dzp));
		VERIFY(*zpp != NULL);
		VERIFY(dzp != NULL);
	} else {
		/*
		 * If we are creating the root node, the "parent" we
		 * passed in is the znode for the root.
		 */
		*zpp = dzp;

		(*zpp)->z_sa_hdl = sa_hdl;
	}

	(*zpp)->z_pflags = pflags;
	(*zpp)->z_mode = mode;

	if (obj_type == DMU_OT_ZNODE ||
	    acl_ids->z_aclp->z_version < ZFS_ACL_VERSION_FUID) {
		VERIFY0(zfs_aclset_common(*zpp, acl_ids->z_aclp, cr, tx));
	}
	kmem_free(sa_attrs, sizeof (sa_bulk_attr_t) * ZPL_END);
	ZFS_OBJ_HOLD_EXIT(zsb, obj);
}