Esempio n. 1
0
static int
zfs_sa_setup(objset_t *osp, sa_attr_type_t **sa_table)
{
	uint64_t sa_obj = 0;
	int error;

	error = zap_lookup(osp, MASTER_NODE_OBJ, ZFS_SA_ATTRS, 8, 1, &sa_obj);
	if (error != 0 && error != ENOENT)
		return (error);

	error = sa_setup(osp, sa_obj, zfs_attr_table, ZPL_END, sa_table);
	return (error);
}
Esempio n. 2
0
File: zfs_vfsops.c Progetto: nwf/zfs
int
zfs_sb_create(const char *osname, zfs_mntopts_t *zmo, zfs_sb_t **zsbp)
{
	objset_t *os;
	zfs_sb_t *zsb;
	uint64_t zval;
	int i, error;
	uint64_t sa_obj;

	zsb = kmem_zalloc(sizeof (zfs_sb_t), KM_SLEEP);

	/*
	 * We claim to always be readonly so we can open snapshots;
	 * other ZPL code will prevent us from writing to snapshots.
	 */
	error = dmu_objset_own(osname, DMU_OST_ZFS, B_TRUE, zsb, &os);
	if (error) {
		kmem_free(zsb, sizeof (zfs_sb_t));
		return (error);
	}

	/*
	 * Optional temporary mount options, free'd in zfs_sb_free().
	 */
	zsb->z_mntopts = (zmo ? zmo : zfs_mntopts_alloc());

	/*
	 * Initialize the zfs-specific filesystem structure.
	 * Should probably make this a kmem cache, shuffle fields,
	 * and just bzero up to z_hold_mtx[].
	 */
	zsb->z_sb = NULL;
	zsb->z_parent = zsb;
	zsb->z_max_blksz = SPA_OLD_MAXBLOCKSIZE;
	zsb->z_show_ctldir = ZFS_SNAPDIR_VISIBLE;
	zsb->z_os = os;

	error = zfs_get_zplprop(os, ZFS_PROP_VERSION, &zsb->z_version);
	if (error) {
		goto out;
	} else if (zsb->z_version > ZPL_VERSION) {
		error = SET_ERROR(ENOTSUP);
		goto out;
	}
	if ((error = zfs_get_zplprop(os, ZFS_PROP_NORMALIZE, &zval)) != 0)
		goto out;
	zsb->z_norm = (int)zval;

	if ((error = zfs_get_zplprop(os, ZFS_PROP_UTF8ONLY, &zval)) != 0)
		goto out;
	zsb->z_utf8 = (zval != 0);

	if ((error = zfs_get_zplprop(os, ZFS_PROP_CASE, &zval)) != 0)
		goto out;
	zsb->z_case = (uint_t)zval;

	if ((error = zfs_get_zplprop(os, ZFS_PROP_ACLTYPE, &zval)) != 0)
		goto out;
	zsb->z_acl_type = (uint_t)zval;

	/*
	 * Fold case on file systems that are always or sometimes case
	 * insensitive.
	 */
	if (zsb->z_case == ZFS_CASE_INSENSITIVE ||
	    zsb->z_case == ZFS_CASE_MIXED)
		zsb->z_norm |= U8_TEXTPREP_TOUPPER;

	zsb->z_use_fuids = USE_FUIDS(zsb->z_version, zsb->z_os);
	zsb->z_use_sa = USE_SA(zsb->z_version, zsb->z_os);

	if (zsb->z_use_sa) {
		/* should either have both of these objects or none */
		error = zap_lookup(os, MASTER_NODE_OBJ, ZFS_SA_ATTRS, 8, 1,
		    &sa_obj);
		if (error)
			goto out;

		error = zfs_get_zplprop(os, ZFS_PROP_XATTR, &zval);
		if ((error == 0) && (zval == ZFS_XATTR_SA))
			zsb->z_xattr_sa = B_TRUE;
	} else {
		/*
		 * Pre SA versions file systems should never touch
		 * either the attribute registration or layout objects.
		 */
		sa_obj = 0;
	}

	error = sa_setup(os, sa_obj, zfs_attr_table, ZPL_END,
	    &zsb->z_attr_table);
	if (error)
		goto out;

	if (zsb->z_version >= ZPL_VERSION_SA)
		sa_register_update_callback(os, zfs_sa_upgrade);

	error = zap_lookup(os, MASTER_NODE_OBJ, ZFS_ROOT_OBJ, 8, 1,
	    &zsb->z_root);
	if (error)
		goto out;
	ASSERT(zsb->z_root != 0);

	error = zap_lookup(os, MASTER_NODE_OBJ, ZFS_UNLINKED_SET, 8, 1,
	    &zsb->z_unlinkedobj);
	if (error)
		goto out;

	error = zap_lookup(os, MASTER_NODE_OBJ,
	    zfs_userquota_prop_prefixes[ZFS_PROP_USERQUOTA],
	    8, 1, &zsb->z_userquota_obj);
	if (error && error != ENOENT)
		goto out;

	error = zap_lookup(os, MASTER_NODE_OBJ,
	    zfs_userquota_prop_prefixes[ZFS_PROP_GROUPQUOTA],
	    8, 1, &zsb->z_groupquota_obj);
	if (error && error != ENOENT)
		goto out;

	error = zap_lookup(os, MASTER_NODE_OBJ, ZFS_FUID_TABLES, 8, 1,
	    &zsb->z_fuid_obj);
	if (error && error != ENOENT)
		goto out;

	error = zap_lookup(os, MASTER_NODE_OBJ, ZFS_SHARES_DIR, 8, 1,
	    &zsb->z_shares_dir);
	if (error && error != ENOENT)
		goto out;

	mutex_init(&zsb->z_znodes_lock, NULL, MUTEX_DEFAULT, NULL);
	mutex_init(&zsb->z_lock, NULL, MUTEX_DEFAULT, NULL);
	list_create(&zsb->z_all_znodes, sizeof (znode_t),
	    offsetof(znode_t, z_link_node));
	rrm_init(&zsb->z_teardown_lock, B_FALSE);
	rw_init(&zsb->z_teardown_inactive_lock, NULL, RW_DEFAULT, NULL);
	rw_init(&zsb->z_fuid_lock, NULL, RW_DEFAULT, NULL);

	zsb->z_hold_mtx = vmem_zalloc(sizeof (kmutex_t) * ZFS_OBJ_MTX_SZ,
	    KM_SLEEP);
	for (i = 0; i != ZFS_OBJ_MTX_SZ; i++)
		mutex_init(&zsb->z_hold_mtx[i], NULL, MUTEX_DEFAULT, NULL);

	*zsbp = zsb;
	return (0);

out:
	dmu_objset_disown(os, zsb);
	*zsbp = NULL;

	vmem_free(zsb->z_hold_mtx, sizeof (kmutex_t) * ZFS_OBJ_MTX_SZ);
	kmem_free(zsb, sizeof (zfs_sb_t));
	return (error);
}
Esempio n. 3
0
File: zfs_vfsops.c Progetto: nwf/zfs
/*
 * Reopen zfs_sb_t and release VFS ops.
 */
int
zfs_resume_fs(zfs_sb_t *zsb, const char *osname)
{
	int err, err2;
	znode_t *zp;
	uint64_t sa_obj = 0;

	ASSERT(RRM_WRITE_HELD(&zsb->z_teardown_lock));
	ASSERT(RW_WRITE_HELD(&zsb->z_teardown_inactive_lock));

	/*
	 * We already own this, so just hold and rele it to update the
	 * objset_t, as the one we had before may have been evicted.
	 */
	VERIFY0(dmu_objset_hold(osname, zsb, &zsb->z_os));
	VERIFY3P(zsb->z_os->os_dsl_dataset->ds_owner, ==, zsb);
	VERIFY(dsl_dataset_long_held(zsb->z_os->os_dsl_dataset));
	dmu_objset_rele(zsb->z_os, zsb);

	/*
	 * Make sure version hasn't changed
	 */

	err = zfs_get_zplprop(zsb->z_os, ZFS_PROP_VERSION,
	    &zsb->z_version);

	if (err)
		goto bail;

	err = zap_lookup(zsb->z_os, MASTER_NODE_OBJ,
	    ZFS_SA_ATTRS, 8, 1, &sa_obj);

	if (err && zsb->z_version >= ZPL_VERSION_SA)
		goto bail;

	if ((err = sa_setup(zsb->z_os, sa_obj,
	    zfs_attr_table,  ZPL_END, &zsb->z_attr_table)) != 0)
		goto bail;

	if (zsb->z_version >= ZPL_VERSION_SA)
		sa_register_update_callback(zsb->z_os,
		    zfs_sa_upgrade);

	VERIFY(zfs_sb_setup(zsb, B_FALSE) == 0);

	zfs_set_fuid_feature(zsb);
	zsb->z_rollback_time = jiffies;

	/*
	 * Attempt to re-establish all the active inodes with their
	 * dbufs.  If a zfs_rezget() fails, then we unhash the inode
	 * and mark it stale.  This prevents a collision if a new
	 * inode/object is created which must use the same inode
	 * number.  The stale inode will be be released when the
	 * VFS prunes the dentry holding the remaining references
	 * on the stale inode.
	 */
	mutex_enter(&zsb->z_znodes_lock);
	for (zp = list_head(&zsb->z_all_znodes); zp;
	    zp = list_next(&zsb->z_all_znodes, zp)) {
		err2 = zfs_rezget(zp);
		if (err2) {
			remove_inode_hash(ZTOI(zp));
			zp->z_is_stale = B_TRUE;
		}
	}
	mutex_exit(&zsb->z_znodes_lock);

bail:
	/* release the VFS ops */
	rw_exit(&zsb->z_teardown_inactive_lock);
	rrm_exit(&zsb->z_teardown_lock, FTAG);

	if (err) {
		/*
		 * Since we couldn't setup the sa framework, try to force
		 * unmount this file system.
		 */
		if (zsb->z_os)
			(void) zfs_umount(zsb->z_sb);
	}
	return (err);
}
Esempio n. 4
0
/*
 * Reopen zfs_sb_t and release VFS ops.
 */
int
zfs_resume_fs(zfs_sb_t *zsb, const char *osname)
{
	int err, err2;

	ASSERT(RRW_WRITE_HELD(&zsb->z_teardown_lock));
	ASSERT(RW_WRITE_HELD(&zsb->z_teardown_inactive_lock));

	err = dmu_objset_own(osname, DMU_OST_ZFS, B_FALSE, zsb, &zsb->z_os);
	if (err) {
		zsb->z_os = NULL;
	} else {
		znode_t *zp;
		uint64_t sa_obj = 0;

		err2 = zap_lookup(zsb->z_os, MASTER_NODE_OBJ,
		    ZFS_SA_ATTRS, 8, 1, &sa_obj);

		if ((err || err2) && zsb->z_version >= ZPL_VERSION_SA)
			goto bail;


		if ((err = sa_setup(zsb->z_os, sa_obj,
		    zfs_attr_table,  ZPL_END, &zsb->z_attr_table)) != 0)
			goto bail;

		VERIFY(zfs_sb_setup(zsb, B_FALSE) == 0);
		zsb->z_rollback_time = jiffies;

		/*
		 * Attempt to re-establish all the active inodes with their
		 * dbufs.  If a zfs_rezget() fails, then we unhash the inode
		 * and mark it stale.  This prevents a collision if a new
		 * inode/object is created which must use the same inode
		 * number.  The stale inode will be be released when the
		 * VFS prunes the dentry holding the remaining references
		 * on the stale inode.
		 */
		mutex_enter(&zsb->z_znodes_lock);
		for (zp = list_head(&zsb->z_all_znodes); zp;
		    zp = list_next(&zsb->z_all_znodes, zp)) {
			err2 = zfs_rezget(zp);
			if (err2) {
				remove_inode_hash(ZTOI(zp));
				zp->z_is_stale = B_TRUE;
			}
		}
		mutex_exit(&zsb->z_znodes_lock);
	}

bail:
	/* release the VFS ops */
	rw_exit(&zsb->z_teardown_inactive_lock);
	rrw_exit(&zsb->z_teardown_lock, FTAG);

	if (err) {
		/*
		 * Since we couldn't reopen zfs_sb_t or, setup the
		 * sa framework, force unmount this file system.
		 */
		if (zsb->z_os)
			(void) zfs_umount(zsb->z_sb);
	}
	return (err);
}
Esempio n. 5
0
void
zfs_create_fs(objset_t *os, cred_t *cr, nvlist_t *zplprops, dmu_tx_t *tx)
{
	struct super_block *sb;
	zfs_sb_t	*zsb;
	uint64_t	moid, obj, sa_obj, version;
	uint64_t	sense = ZFS_CASE_SENSITIVE;
	uint64_t	norm = 0;
	nvpair_t	*elem;
	int		error;
	int		i;
	znode_t		*rootzp = NULL;
	vattr_t		vattr;
	znode_t		*zp;
	zfs_acl_ids_t	acl_ids;

	/*
	 * First attempt to create master node.
	 */
	/*
	 * In an empty objset, there are no blocks to read and thus
	 * there can be no i/o errors (which we assert below).
	 */
	moid = MASTER_NODE_OBJ;
	error = zap_create_claim(os, moid, DMU_OT_MASTER_NODE,
	    DMU_OT_NONE, 0, tx);
	ASSERT(error == 0);

	/*
	 * Set starting attributes.
	 */
	version = zfs_zpl_version_map(spa_version(dmu_objset_spa(os)));
	elem = NULL;
	while ((elem = nvlist_next_nvpair(zplprops, elem)) != NULL) {
		/* For the moment we expect all zpl props to be uint64_ts */
		uint64_t val;
		char *name;

		ASSERT(nvpair_type(elem) == DATA_TYPE_UINT64);
		VERIFY(nvpair_value_uint64(elem, &val) == 0);
		name = nvpair_name(elem);
		if (strcmp(name, zfs_prop_to_name(ZFS_PROP_VERSION)) == 0) {
			if (val < version)
				version = val;
		} else {
			error = zap_update(os, moid, name, 8, 1, &val, tx);
		}
		ASSERT(error == 0);
		if (strcmp(name, zfs_prop_to_name(ZFS_PROP_NORMALIZE)) == 0)
			norm = val;
		else if (strcmp(name, zfs_prop_to_name(ZFS_PROP_CASE)) == 0)
			sense = val;
	}
	ASSERT(version != 0);
	error = zap_update(os, moid, ZPL_VERSION_STR, 8, 1, &version, tx);

	/*
	 * Create zap object used for SA attribute registration
	 */

	if (version >= ZPL_VERSION_SA) {
		sa_obj = zap_create(os, DMU_OT_SA_MASTER_NODE,
		    DMU_OT_NONE, 0, tx);
		error = zap_add(os, moid, ZFS_SA_ATTRS, 8, 1, &sa_obj, tx);
		ASSERT(error == 0);
	} else {
		sa_obj = 0;
	}
	/*
	 * Create a delete queue.
	 */
	obj = zap_create(os, DMU_OT_UNLINKED_SET, DMU_OT_NONE, 0, tx);

	error = zap_add(os, moid, ZFS_UNLINKED_SET, 8, 1, &obj, tx);
	ASSERT(error == 0);

	/*
	 * Create root znode.  Create minimal znode/inode/zsb/sb
	 * to allow zfs_mknode to work.
	 */
	vattr.va_mask = ATTR_MODE|ATTR_UID|ATTR_GID;
	vattr.va_mode = S_IFDIR|0755;
	vattr.va_uid = crgetuid(cr);
	vattr.va_gid = crgetgid(cr);

	rootzp = kmem_cache_alloc(znode_cache, KM_PUSHPAGE);
	rootzp->z_moved = 0;
	rootzp->z_unlinked = 0;
	rootzp->z_atime_dirty = 0;
	rootzp->z_is_sa = USE_SA(version, os);

	zsb = kmem_zalloc(sizeof (zfs_sb_t), KM_PUSHPAGE | KM_NODEBUG);
	zsb->z_os = os;
	zsb->z_parent = zsb;
	zsb->z_version = version;
	zsb->z_use_fuids = USE_FUIDS(version, os);
	zsb->z_use_sa = USE_SA(version, os);
	zsb->z_norm = norm;

	sb = kmem_zalloc(sizeof (struct super_block), KM_PUSHPAGE);
	sb->s_fs_info = zsb;

	ZTOI(rootzp)->i_sb = sb;

	error = sa_setup(os, sa_obj, zfs_attr_table, ZPL_END,
	    &zsb->z_attr_table);

	ASSERT(error == 0);

	/*
	 * Fold case on file systems that are always or sometimes case
	 * insensitive.
	 */
	if (sense == ZFS_CASE_INSENSITIVE || sense == ZFS_CASE_MIXED)
		zsb->z_norm |= U8_TEXTPREP_TOUPPER;

	mutex_init(&zsb->z_znodes_lock, NULL, MUTEX_DEFAULT, NULL);
	list_create(&zsb->z_all_znodes, sizeof (znode_t),
	    offsetof(znode_t, z_link_node));

	for (i = 0; i != ZFS_OBJ_MTX_SZ; i++)
		mutex_init(&zsb->z_hold_mtx[i], NULL, MUTEX_DEFAULT, NULL);

	VERIFY(0 == zfs_acl_ids_create(rootzp, IS_ROOT_NODE, &vattr,
	    cr, NULL, &acl_ids));
	zfs_mknode(rootzp, &vattr, tx, cr, IS_ROOT_NODE, &zp, &acl_ids);
	ASSERT3P(zp, ==, rootzp);
	error = zap_add(os, moid, ZFS_ROOT_OBJ, 8, 1, &rootzp->z_id, tx);
	ASSERT(error == 0);
	zfs_acl_ids_free(&acl_ids);

	atomic_set(&ZTOI(rootzp)->i_count, 0);
	sa_handle_destroy(rootzp->z_sa_hdl);
	kmem_cache_free(znode_cache, rootzp);

	/*
	 * Create shares directory
	 */
	error = zfs_create_share_dir(zsb, tx);
	ASSERT(error == 0);

	for (i = 0; i != ZFS_OBJ_MTX_SZ; i++)
		mutex_destroy(&zsb->z_hold_mtx[i]);

	kmem_free(sb, sizeof (struct super_block));
	kmem_free(zsb, sizeof (zfs_sb_t));
}