Commit 5f935920 authored by Andreas Gruenbacher's avatar Andreas Gruenbacher Committed by Philipp Reisner
Browse files

drbd: Make drbd's use of netlink attribute flags less confusing 



Make it more clear in the flag names which flags are internal to drbd, and
which are not.

The check for mandatory attributes is the only extension visible at the netlink
layer.  Attributes with this flag set would look like unknown attributes to
some kernel versions.  The netlink layer would ignore them and also skip
consistency checks on the attribute type and legth.  To avoid this, we check
for mandatory attributes first, remove the mandatory flag, and then process the
attributes normally.

Signed-off-by: default avatarPhilipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: default avatarLars Ellenberg <lars.ellenberg@linbit.com>
parent bbbef2d5

include/linux/drbd_genl.h

+122 −122
Original line number Diff line number Diff line
@@ -86,7 +86,7 @@ 
 */

GENL_struct(DRBD_NLA_CFG_REPLY, 1, drbd_cfg_reply,

		/* "arbitrary" size strings, nla_policy.len = 0 */

	__str_field(1, GENLA_F_MANDATORY,	info_text, 0)

	__str_field(1, DRBD_GENLA_F_MANDATORY,	info_text, 0)

)



/* Configuration requests typically need a context to operate on.
@@ -95,133 +95,133 @@ GENL_struct(DRBD_NLA_CFG_REPLY, 1, drbd_cfg_reply, 
 * and/or the replication group (aka resource) name,

 * and the volume id within the resource. */

GENL_struct(DRBD_NLA_CFG_CONTEXT, 2, drbd_cfg_context,

	__u32_field(1, GENLA_F_MANDATORY,	ctx_volume)

	__str_field(2, GENLA_F_MANDATORY,	ctx_conn_name, 128)

	__u32_field(1, DRBD_GENLA_F_MANDATORY,	ctx_volume)

	__str_field(2, DRBD_GENLA_F_MANDATORY,	ctx_conn_name, 128)

)



GENL_struct(DRBD_NLA_DISK_CONF, 3, disk_conf,

	__str_field(1, GENLA_F_REQUIRED | GENLA_F_INVARIANT,	backing_dev,	128)

	__str_field(2, GENLA_F_REQUIRED | GENLA_F_INVARIANT,	meta_dev,	128)

	__s32_field(3, GENLA_F_REQUIRED | GENLA_F_INVARIANT,	meta_dev_idx)

	__str_field(1, DRBD_F_REQUIRED | DRBD_F_INVARIANT,	backing_dev,	128)

	__str_field(2, DRBD_F_REQUIRED | DRBD_F_INVARIANT,	meta_dev,	128)

	__s32_field(3, DRBD_F_REQUIRED | DRBD_F_INVARIANT,	meta_dev_idx)



	/* use the resize command to try and change the disk_size */

	__u64_field(4, GENLA_F_MANDATORY | GENLA_F_INVARIANT,	disk_size)

	__u64_field(4, DRBD_GENLA_F_MANDATORY | DRBD_F_INVARIANT,	disk_size)

	/* we could change the max_bio_bvecs,

	 * but it won't propagate through the stack */

	__u32_field(5, GENLA_F_MANDATORY | GENLA_F_INVARIANT,	max_bio_bvecs)



	__u32_field_def(6, GENLA_F_MANDATORY,	on_io_error, DRBD_ON_IO_ERROR_DEF)

	__u32_field_def(7, GENLA_F_MANDATORY,	fencing, DRBD_FENCING_DEF)



	__u32_field_def(8,	GENLA_F_MANDATORY,	resync_rate, DRBD_RESYNC_RATE_DEF)

	__s32_field_def(9,	GENLA_F_MANDATORY,	resync_after, DRBD_RESYNC_AFTER_DEF)

	__u32_field_def(10,	GENLA_F_MANDATORY,	al_extents, DRBD_AL_EXTENTS_DEF)

	__u32_field_def(11,	GENLA_F_MANDATORY,	c_plan_ahead, DRBD_C_PLAN_AHEAD_DEF)

	__u32_field_def(12,	GENLA_F_MANDATORY,	c_delay_target, DRBD_C_DELAY_TARGET_DEF)

	__u32_field_def(13,	GENLA_F_MANDATORY,	c_fill_target, DRBD_C_FILL_TARGET_DEF)

	__u32_field_def(14,	GENLA_F_MANDATORY,	c_max_rate, DRBD_C_MAX_RATE_DEF)

	__u32_field_def(15,	GENLA_F_MANDATORY,	c_min_rate, DRBD_C_MIN_RATE_DEF)



	__flg_field_def(16, GENLA_F_MANDATORY,	disk_barrier, DRBD_DISK_BARRIER_DEF)

	__flg_field_def(17, GENLA_F_MANDATORY,	disk_flushes, DRBD_DISK_FLUSHES_DEF)

	__flg_field_def(18, GENLA_F_MANDATORY,	disk_drain, DRBD_DISK_DRAIN_DEF)

	__flg_field_def(19, GENLA_F_MANDATORY,	md_flushes, DRBD_MD_FLUSHES_DEF)

	__u32_field(5, DRBD_GENLA_F_MANDATORY | DRBD_F_INVARIANT,	max_bio_bvecs)



	__u32_field_def(6, DRBD_GENLA_F_MANDATORY,	on_io_error, DRBD_ON_IO_ERROR_DEF)

	__u32_field_def(7, DRBD_GENLA_F_MANDATORY,	fencing, DRBD_FENCING_DEF)



	__u32_field_def(8,	DRBD_GENLA_F_MANDATORY,	resync_rate, DRBD_RESYNC_RATE_DEF)

	__s32_field_def(9,	DRBD_GENLA_F_MANDATORY,	resync_after, DRBD_MINOR_NUMBER_DEF)

	__u32_field_def(10,	DRBD_GENLA_F_MANDATORY,	al_extents, DRBD_AL_EXTENTS_DEF)

	__u32_field_def(11,	DRBD_GENLA_F_MANDATORY,	c_plan_ahead, DRBD_C_PLAN_AHEAD_DEF)

	__u32_field_def(12,	DRBD_GENLA_F_MANDATORY,	c_delay_target, DRBD_C_DELAY_TARGET_DEF)

	__u32_field_def(13,	DRBD_GENLA_F_MANDATORY,	c_fill_target, DRBD_C_FILL_TARGET_DEF)

	__u32_field_def(14,	DRBD_GENLA_F_MANDATORY,	c_max_rate, DRBD_C_MAX_RATE_DEF)

	__u32_field_def(15,	DRBD_GENLA_F_MANDATORY,	c_min_rate, DRBD_C_MIN_RATE_DEF)



	__flg_field_def(16, DRBD_GENLA_F_MANDATORY,	disk_barrier, DRBD_DISK_BARRIER_DEF)

	__flg_field_def(17, DRBD_GENLA_F_MANDATORY,	disk_flushes, DRBD_DISK_FLUSHES_DEF)

	__flg_field_def(18, DRBD_GENLA_F_MANDATORY,	disk_drain, DRBD_DISK_DRAIN_DEF)

	__flg_field_def(19, DRBD_GENLA_F_MANDATORY,	md_flushes, DRBD_MD_FLUSHES_DEF)

)



GENL_struct(DRBD_NLA_RESOURCE_OPTS, 4, res_opts,

	__str_field_def(1,	GENLA_F_MANDATORY,	cpu_mask,       32)

	__u32_field_def(2,	GENLA_F_MANDATORY,	on_no_data, DRBD_ON_NO_DATA_DEF)

	__str_field_def(1,	DRBD_GENLA_F_MANDATORY,	cpu_mask,       32)

	__u32_field_def(2,	DRBD_GENLA_F_MANDATORY,	on_no_data, DRBD_ON_NO_DATA_DEF)

)



GENL_struct(DRBD_NLA_NET_CONF, 5, net_conf,

	__bin_field(1,	GENLA_F_REQUIRED | GENLA_F_INVARIANT,	my_addr,	128)

	__bin_field(2,	GENLA_F_REQUIRED | GENLA_F_INVARIANT,	peer_addr,	128)

	__str_field_def(3,	GENLA_F_MANDATORY | GENLA_F_SENSITIVE,

	__bin_field(1,	DRBD_F_REQUIRED | DRBD_F_INVARIANT,	my_addr,	128)

	__bin_field(2,	DRBD_F_REQUIRED | DRBD_F_INVARIANT,	peer_addr,	128)

	__str_field_def(3,	DRBD_GENLA_F_MANDATORY | DRBD_F_SENSITIVE,

						shared_secret,	SHARED_SECRET_MAX)

	__str_field_def(4,	GENLA_F_MANDATORY,	cram_hmac_alg,	SHARED_SECRET_MAX)

	__str_field_def(5,	GENLA_F_MANDATORY,	integrity_alg,	SHARED_SECRET_MAX)

	__str_field_def(6,	GENLA_F_MANDATORY,	verify_alg,     SHARED_SECRET_MAX)

	__str_field_def(7,	GENLA_F_MANDATORY,	csums_alg,	SHARED_SECRET_MAX)

	__u32_field_def(8,	GENLA_F_MANDATORY,	wire_protocol, DRBD_PROTOCOL_DEF)

	__u32_field_def(9,	GENLA_F_MANDATORY,	connect_int, DRBD_CONNECT_INT_DEF)

	__u32_field_def(10,	GENLA_F_MANDATORY,	timeout, DRBD_TIMEOUT_DEF)

	__u32_field_def(11,	GENLA_F_MANDATORY,	ping_int, DRBD_PING_INT_DEF)

	__u32_field_def(12,	GENLA_F_MANDATORY,	ping_timeo, DRBD_PING_TIMEO_DEF)

	__u32_field_def(13,	GENLA_F_MANDATORY,	sndbuf_size, DRBD_SNDBUF_SIZE_DEF)

	__u32_field_def(14,	GENLA_F_MANDATORY,	rcvbuf_size, DRBD_RCVBUF_SIZE_DEF)

	__u32_field_def(15,	GENLA_F_MANDATORY,	ko_count, DRBD_KO_COUNT_DEF)

	__u32_field_def(16,	GENLA_F_MANDATORY,	max_buffers, DRBD_MAX_BUFFERS_DEF)

	__u32_field_def(17,	GENLA_F_MANDATORY,	max_epoch_size, DRBD_MAX_EPOCH_SIZE_DEF)

	__u32_field_def(18,	GENLA_F_MANDATORY,	unplug_watermark, DRBD_UNPLUG_WATERMARK_DEF)

	__u32_field_def(19,	GENLA_F_MANDATORY,	after_sb_0p, DRBD_AFTER_SB_0P_DEF)

	__u32_field_def(20,	GENLA_F_MANDATORY,	after_sb_1p, DRBD_AFTER_SB_1P_DEF)

	__u32_field_def(21,	GENLA_F_MANDATORY,	after_sb_2p, DRBD_AFTER_SB_2P_DEF)

	__u32_field_def(22,	GENLA_F_MANDATORY,	rr_conflict, DRBD_RR_CONFLICT_DEF)

	__u32_field_def(23,	GENLA_F_MANDATORY,	on_congestion, DRBD_ON_CONGESTION_DEF)

	__u32_field_def(24,	GENLA_F_MANDATORY,	cong_fill, DRBD_CONG_FILL_DEF)

	__u32_field_def(25,	GENLA_F_MANDATORY,	cong_extents, DRBD_CONG_EXTENTS_DEF)

	__flg_field_def(26, GENLA_F_MANDATORY,	two_primaries, DRBD_ALLOW_TWO_PRIMARIES_DEF)

	__flg_field(27, GENLA_F_MANDATORY | GENLA_F_INVARIANT,	discard_my_data)

	__flg_field_def(28, GENLA_F_MANDATORY,	tcp_cork, DRBD_TCP_CORK_DEF)

	__flg_field_def(29, GENLA_F_MANDATORY,	always_asbp, DRBD_ALWAYS_ASBP_DEF)

	__flg_field(30, GENLA_F_MANDATORY | GENLA_F_INVARIANT,	dry_run)

	__flg_field_def(31,	GENLA_F_MANDATORY,	use_rle, DRBD_USE_RLE_DEF)

	__str_field_def(4,	DRBD_GENLA_F_MANDATORY,	cram_hmac_alg,	SHARED_SECRET_MAX)

	__str_field_def(5,	DRBD_GENLA_F_MANDATORY,	integrity_alg,	SHARED_SECRET_MAX)

	__str_field_def(6,	DRBD_GENLA_F_MANDATORY,	verify_alg,     SHARED_SECRET_MAX)

	__str_field_def(7,	DRBD_GENLA_F_MANDATORY,	csums_alg,	SHARED_SECRET_MAX)

	__u32_field_def(8,	DRBD_GENLA_F_MANDATORY,	wire_protocol, DRBD_PROTOCOL_DEF)

	__u32_field_def(9,	DRBD_GENLA_F_MANDATORY,	connect_int, DRBD_CONNECT_INT_DEF)

	__u32_field_def(10,	DRBD_GENLA_F_MANDATORY,	timeout, DRBD_TIMEOUT_DEF)

	__u32_field_def(11,	DRBD_GENLA_F_MANDATORY,	ping_int, DRBD_PING_INT_DEF)

	__u32_field_def(12,	DRBD_GENLA_F_MANDATORY,	ping_timeo, DRBD_PING_TIMEO_DEF)

	__u32_field_def(13,	DRBD_GENLA_F_MANDATORY,	sndbuf_size, DRBD_SNDBUF_SIZE_DEF)

	__u32_field_def(14,	DRBD_GENLA_F_MANDATORY,	rcvbuf_size, DRBD_RCVBUF_SIZE_DEF)

	__u32_field_def(15,	DRBD_GENLA_F_MANDATORY,	ko_count, DRBD_KO_COUNT_DEF)

	__u32_field_def(16,	DRBD_GENLA_F_MANDATORY,	max_buffers, DRBD_MAX_BUFFERS_DEF)

	__u32_field_def(17,	DRBD_GENLA_F_MANDATORY,	max_epoch_size, DRBD_MAX_EPOCH_SIZE_DEF)

	__u32_field_def(18,	DRBD_GENLA_F_MANDATORY,	unplug_watermark, DRBD_UNPLUG_WATERMARK_DEF)

	__u32_field_def(19,	DRBD_GENLA_F_MANDATORY,	after_sb_0p, DRBD_AFTER_SB_0P_DEF)

	__u32_field_def(20,	DRBD_GENLA_F_MANDATORY,	after_sb_1p, DRBD_AFTER_SB_1P_DEF)

	__u32_field_def(21,	DRBD_GENLA_F_MANDATORY,	after_sb_2p, DRBD_AFTER_SB_2P_DEF)

	__u32_field_def(22,	DRBD_GENLA_F_MANDATORY,	rr_conflict, DRBD_RR_CONFLICT_DEF)

	__u32_field_def(23,	DRBD_GENLA_F_MANDATORY,	on_congestion, DRBD_ON_CONGESTION_DEF)

	__u32_field_def(24,	DRBD_GENLA_F_MANDATORY,	cong_fill, DRBD_CONG_FILL_DEF)

	__u32_field_def(25,	DRBD_GENLA_F_MANDATORY,	cong_extents, DRBD_CONG_EXTENTS_DEF)

	__flg_field_def(26, DRBD_GENLA_F_MANDATORY,	two_primaries, DRBD_ALLOW_TWO_PRIMARIES_DEF)

	__flg_field(27, DRBD_GENLA_F_MANDATORY | DRBD_F_INVARIANT,	discard_my_data)

	__flg_field_def(28, DRBD_GENLA_F_MANDATORY,	tcp_cork, DRBD_TCP_CORK_DEF)

	__flg_field_def(29, DRBD_GENLA_F_MANDATORY,	always_asbp, DRBD_ALWAYS_ASBP_DEF)

	__flg_field(30, DRBD_GENLA_F_MANDATORY | DRBD_F_INVARIANT,	dry_run)

	__flg_field_def(31,	DRBD_GENLA_F_MANDATORY,	use_rle, DRBD_USE_RLE_DEF)

)



GENL_struct(DRBD_NLA_SET_ROLE_PARMS, 6, set_role_parms,

	__flg_field(1, GENLA_F_MANDATORY,	assume_uptodate)

	__flg_field(1, DRBD_GENLA_F_MANDATORY,	assume_uptodate)

)



GENL_struct(DRBD_NLA_RESIZE_PARMS, 7, resize_parms,

	__u64_field(1, GENLA_F_MANDATORY,	resize_size)

	__flg_field(2, GENLA_F_MANDATORY,	resize_force)

	__flg_field(3, GENLA_F_MANDATORY,	no_resync)

	__u64_field(1, DRBD_GENLA_F_MANDATORY,	resize_size)

	__flg_field(2, DRBD_GENLA_F_MANDATORY,	resize_force)

	__flg_field(3, DRBD_GENLA_F_MANDATORY,	no_resync)

)



GENL_struct(DRBD_NLA_STATE_INFO, 8, state_info,

	/* the reason of the broadcast,

	 * if this is an event triggered broadcast. */

	__u32_field(1, GENLA_F_MANDATORY,	sib_reason)

	__u32_field(2, GENLA_F_REQUIRED,	current_state)

	__u64_field(3, GENLA_F_MANDATORY,	capacity)

	__u64_field(4, GENLA_F_MANDATORY,	ed_uuid)

	__u32_field(1, DRBD_GENLA_F_MANDATORY,	sib_reason)

	__u32_field(2, DRBD_F_REQUIRED,	current_state)

	__u64_field(3, DRBD_GENLA_F_MANDATORY,	capacity)

	__u64_field(4, DRBD_GENLA_F_MANDATORY,	ed_uuid)



	/* These are for broadcast from after state change work.

	 * prev_state and new_state are from the moment the state change took

	 * place, new_state is not neccessarily the same as current_state,

	 * there may have been more state changes since.  Which will be

	 * broadcasted soon, in their respective after state change work.  */

	__u32_field(5, GENLA_F_MANDATORY,	prev_state)

	__u32_field(6, GENLA_F_MANDATORY,	new_state)

	__u32_field(5, DRBD_GENLA_F_MANDATORY,	prev_state)

	__u32_field(6, DRBD_GENLA_F_MANDATORY,	new_state)



	/* if we have a local disk: */

	__bin_field(7, GENLA_F_MANDATORY,	uuids, (UI_SIZE*sizeof(__u64)))

	__u32_field(8, GENLA_F_MANDATORY,	disk_flags)

	__u64_field(9, GENLA_F_MANDATORY,	bits_total)

	__u64_field(10, GENLA_F_MANDATORY,	bits_oos)

	__bin_field(7, DRBD_GENLA_F_MANDATORY,	uuids, (UI_SIZE*sizeof(__u64)))

	__u32_field(8, DRBD_GENLA_F_MANDATORY,	disk_flags)

	__u64_field(9, DRBD_GENLA_F_MANDATORY,	bits_total)

	__u64_field(10, DRBD_GENLA_F_MANDATORY,	bits_oos)

	/* and in case resync or online verify is active */

	__u64_field(11, GENLA_F_MANDATORY,	bits_rs_total)

	__u64_field(12, GENLA_F_MANDATORY,	bits_rs_failed)

	__u64_field(11, DRBD_GENLA_F_MANDATORY,	bits_rs_total)

	__u64_field(12, DRBD_GENLA_F_MANDATORY,	bits_rs_failed)



	/* for pre and post notifications of helper execution */

	__str_field(13, GENLA_F_MANDATORY,	helper, 32)

	__u32_field(14, GENLA_F_MANDATORY,	helper_exit_code)

	__str_field(13, DRBD_GENLA_F_MANDATORY,	helper, 32)

	__u32_field(14, DRBD_GENLA_F_MANDATORY,	helper_exit_code)

)



GENL_struct(DRBD_NLA_START_OV_PARMS, 9, start_ov_parms,

	__u64_field(1, GENLA_F_MANDATORY,	ov_start_sector)

	__u64_field(1, DRBD_GENLA_F_MANDATORY,	ov_start_sector)

)



GENL_struct(DRBD_NLA_NEW_C_UUID_PARMS, 10, new_c_uuid_parms,

	__flg_field(1, GENLA_F_MANDATORY, clear_bm)

	__flg_field(1, DRBD_GENLA_F_MANDATORY, clear_bm)

)



GENL_struct(DRBD_NLA_TIMEOUT_PARMS, 11, timeout_parms,

	__u32_field(1,	GENLA_F_REQUIRED,	timeout_type)

	__u32_field(1,	DRBD_F_REQUIRED,	timeout_type)

)



GENL_struct(DRBD_NLA_DISCONNECT_PARMS, 12, disconnect_parms,

	__flg_field(1, GENLA_F_MANDATORY,	force_disconnect)

	__flg_field(1, DRBD_GENLA_F_MANDATORY,	force_disconnect)

)



/*
@@ -232,11 +232,11 @@ GENL_mc_group(events) 
	/* kernel -> userspace announcement of changes */

GENL_notification(

	DRBD_EVENT, 1, events,

	GENL_tla_expected(DRBD_NLA_CFG_CONTEXT, GENLA_F_REQUIRED)

	GENL_tla_expected(DRBD_NLA_STATE_INFO, GENLA_F_REQUIRED)

	GENL_tla_expected(DRBD_NLA_NET_CONF, GENLA_F_MANDATORY)

	GENL_tla_expected(DRBD_NLA_DISK_CONF, GENLA_F_MANDATORY)

	GENL_tla_expected(DRBD_NLA_SYNCER_CONF, GENLA_F_MANDATORY)

	GENL_tla_expected(DRBD_NLA_CFG_CONTEXT, DRBD_F_REQUIRED)

	GENL_tla_expected(DRBD_NLA_STATE_INFO, DRBD_F_REQUIRED)

	GENL_tla_expected(DRBD_NLA_NET_CONF, DRBD_GENLA_F_MANDATORY)

	GENL_tla_expected(DRBD_NLA_DISK_CONF, DRBD_GENLA_F_MANDATORY)

	GENL_tla_expected(DRBD_NLA_SYNCER_CONF, DRBD_GENLA_F_MANDATORY)

)



	/* query kernel for specific or all info */
@@ -250,116 +250,116 @@ GENL_op( 
	),

	/* To select the object .doit.

	 * Or a subset of objects in .dumpit. */

	GENL_tla_expected(DRBD_NLA_CFG_CONTEXT, GENLA_F_MANDATORY)

	GENL_tla_expected(DRBD_NLA_CFG_CONTEXT, DRBD_GENLA_F_MANDATORY)

)



#if 0

	/* TO BE DONE */

	/* create or destroy resources, aka replication groups */

GENL_op(DRBD_ADM_CREATE_RESOURCE, 3, GENL_doit(drbd_adm_create_resource),

	GENL_tla_expected(DRBD_NLA_CFG_CONTEXT, GENLA_F_REQUIRED))

	GENL_tla_expected(DRBD_NLA_CFG_CONTEXT, DRBD_F_REQUIRED))

GENL_op(DRBD_ADM_DELETE_RESOURCE, 4, GENL_doit(drbd_adm_delete_resource),

	GENL_tla_expected(DRBD_NLA_CFG_CONTEXT, GENLA_F_REQUIRED))

	GENL_tla_expected(DRBD_NLA_CFG_CONTEXT, DRBD_F_REQUIRED))

#endif



	/* add DRBD minor devices as volumes to resources */

GENL_op(DRBD_ADM_ADD_MINOR, 5, GENL_doit(drbd_adm_add_minor),

	GENL_tla_expected(DRBD_NLA_CFG_CONTEXT, GENLA_F_REQUIRED))

	GENL_tla_expected(DRBD_NLA_CFG_CONTEXT, DRBD_F_REQUIRED))

GENL_op(DRBD_ADM_DEL_MINOR, 6, GENL_doit(drbd_adm_delete_minor),

	GENL_tla_expected(DRBD_NLA_CFG_CONTEXT, GENLA_F_REQUIRED))

	GENL_tla_expected(DRBD_NLA_CFG_CONTEXT, DRBD_F_REQUIRED))



	/* add or delete replication links to resources */

GENL_op(DRBD_ADM_ADD_LINK, 7, GENL_doit(drbd_adm_create_connection),

	GENL_tla_expected(DRBD_NLA_CFG_CONTEXT, GENLA_F_REQUIRED))

	GENL_tla_expected(DRBD_NLA_CFG_CONTEXT, DRBD_F_REQUIRED))

GENL_op(DRBD_ADM_DEL_LINK, 8, GENL_doit(drbd_adm_delete_connection),

	GENL_tla_expected(DRBD_NLA_CFG_CONTEXT, GENLA_F_REQUIRED))

	GENL_tla_expected(DRBD_NLA_CFG_CONTEXT, DRBD_F_REQUIRED))



GENL_op(DRBD_ADM_RESOURCE_OPTS, 9,

	GENL_doit(drbd_adm_resource_opts),

	GENL_tla_expected(DRBD_NLA_CFG_CONTEXT, GENLA_F_REQUIRED)

	GENL_tla_expected(DRBD_NLA_RESOURCE_OPTS, GENLA_F_MANDATORY)

	GENL_tla_expected(DRBD_NLA_CFG_CONTEXT, DRBD_F_REQUIRED)

	GENL_tla_expected(DRBD_NLA_RESOURCE_OPTS, DRBD_GENLA_F_MANDATORY)

)



GENL_op(

	DRBD_ADM_CONNECT, 10,

	GENL_doit(drbd_adm_connect),

	GENL_tla_expected(DRBD_NLA_CFG_CONTEXT, GENLA_F_REQUIRED)

	GENL_tla_expected(DRBD_NLA_NET_CONF, GENLA_F_REQUIRED)

	GENL_tla_expected(DRBD_NLA_CFG_CONTEXT, DRBD_F_REQUIRED)

	GENL_tla_expected(DRBD_NLA_NET_CONF, DRBD_F_REQUIRED)

)



GENL_op(

	DRBD_ADM_CHG_NET_OPTS, 29,

	GENL_doit(drbd_adm_net_opts),

	GENL_tla_expected(DRBD_NLA_CFG_CONTEXT, GENLA_F_REQUIRED)

	GENL_tla_expected(DRBD_NLA_NET_CONF, GENLA_F_REQUIRED)

	GENL_tla_expected(DRBD_NLA_CFG_CONTEXT, DRBD_F_REQUIRED)

	GENL_tla_expected(DRBD_NLA_NET_CONF, DRBD_F_REQUIRED)

)



GENL_op(DRBD_ADM_DISCONNECT, 11, GENL_doit(drbd_adm_disconnect),

	GENL_tla_expected(DRBD_NLA_CFG_CONTEXT, GENLA_F_REQUIRED))

	GENL_tla_expected(DRBD_NLA_CFG_CONTEXT, DRBD_F_REQUIRED))



GENL_op(DRBD_ADM_ATTACH, 12,

	GENL_doit(drbd_adm_attach),

	GENL_tla_expected(DRBD_NLA_CFG_CONTEXT, GENLA_F_REQUIRED)

	GENL_tla_expected(DRBD_NLA_DISK_CONF, GENLA_F_REQUIRED)

	GENL_tla_expected(DRBD_NLA_CFG_CONTEXT, DRBD_F_REQUIRED)

	GENL_tla_expected(DRBD_NLA_DISK_CONF, DRBD_F_REQUIRED)

)



GENL_op(DRBD_ADM_CHG_DISK_OPTS, 28,

	GENL_doit(drbd_adm_disk_opts),

	GENL_tla_expected(DRBD_NLA_CFG_CONTEXT, GENLA_F_REQUIRED)

	GENL_tla_expected(DRBD_NLA_DISK_OPTS, GENLA_F_REQUIRED)

	GENL_tla_expected(DRBD_NLA_CFG_CONTEXT, DRBD_F_REQUIRED)

	GENL_tla_expected(DRBD_NLA_DISK_OPTS, DRBD_F_REQUIRED)

)



GENL_op(

	DRBD_ADM_RESIZE, 13,

	GENL_doit(drbd_adm_resize),

	GENL_tla_expected(DRBD_NLA_CFG_CONTEXT, GENLA_F_REQUIRED)

	GENL_tla_expected(DRBD_NLA_RESIZE_PARMS, GENLA_F_MANDATORY)

	GENL_tla_expected(DRBD_NLA_CFG_CONTEXT, DRBD_F_REQUIRED)

	GENL_tla_expected(DRBD_NLA_RESIZE_PARMS, DRBD_GENLA_F_MANDATORY)

)



GENL_op(

	DRBD_ADM_PRIMARY, 14,

	GENL_doit(drbd_adm_set_role),

	GENL_tla_expected(DRBD_NLA_CFG_CONTEXT, GENLA_F_REQUIRED)

	GENL_tla_expected(DRBD_NLA_SET_ROLE_PARMS, GENLA_F_REQUIRED)

	GENL_tla_expected(DRBD_NLA_CFG_CONTEXT, DRBD_F_REQUIRED)

	GENL_tla_expected(DRBD_NLA_SET_ROLE_PARMS, DRBD_F_REQUIRED)

)



GENL_op(

	DRBD_ADM_SECONDARY, 15,

	GENL_doit(drbd_adm_set_role),

	GENL_tla_expected(DRBD_NLA_CFG_CONTEXT, GENLA_F_REQUIRED)

	GENL_tla_expected(DRBD_NLA_SET_ROLE_PARMS, GENLA_F_REQUIRED)

	GENL_tla_expected(DRBD_NLA_CFG_CONTEXT, DRBD_F_REQUIRED)

	GENL_tla_expected(DRBD_NLA_SET_ROLE_PARMS, DRBD_F_REQUIRED)

)



GENL_op(

	DRBD_ADM_NEW_C_UUID, 16,

	GENL_doit(drbd_adm_new_c_uuid),

	GENL_tla_expected(DRBD_NLA_CFG_CONTEXT, GENLA_F_REQUIRED)

	GENL_tla_expected(DRBD_NLA_NEW_C_UUID_PARMS, GENLA_F_MANDATORY)

	GENL_tla_expected(DRBD_NLA_CFG_CONTEXT, DRBD_F_REQUIRED)

	GENL_tla_expected(DRBD_NLA_NEW_C_UUID_PARMS, DRBD_GENLA_F_MANDATORY)

)



GENL_op(

	DRBD_ADM_START_OV, 17,

	GENL_doit(drbd_adm_start_ov),

	GENL_tla_expected(DRBD_NLA_START_OV_PARMS, GENLA_F_MANDATORY)

	GENL_tla_expected(DRBD_NLA_START_OV_PARMS, DRBD_GENLA_F_MANDATORY)

)



GENL_op(DRBD_ADM_DETACH,	18, GENL_doit(drbd_adm_detach),

	GENL_tla_expected(DRBD_NLA_CFG_CONTEXT, GENLA_F_REQUIRED))

	GENL_tla_expected(DRBD_NLA_CFG_CONTEXT, DRBD_F_REQUIRED))

GENL_op(DRBD_ADM_INVALIDATE,	19, GENL_doit(drbd_adm_invalidate),

	GENL_tla_expected(DRBD_NLA_CFG_CONTEXT, GENLA_F_REQUIRED))

	GENL_tla_expected(DRBD_NLA_CFG_CONTEXT, DRBD_F_REQUIRED))

GENL_op(DRBD_ADM_INVAL_PEER,	20, GENL_doit(drbd_adm_invalidate_peer),

	GENL_tla_expected(DRBD_NLA_CFG_CONTEXT, GENLA_F_REQUIRED))

	GENL_tla_expected(DRBD_NLA_CFG_CONTEXT, DRBD_F_REQUIRED))

GENL_op(DRBD_ADM_PAUSE_SYNC,	21, GENL_doit(drbd_adm_pause_sync),

	GENL_tla_expected(DRBD_NLA_CFG_CONTEXT, GENLA_F_REQUIRED))

	GENL_tla_expected(DRBD_NLA_CFG_CONTEXT, DRBD_F_REQUIRED))

GENL_op(DRBD_ADM_RESUME_SYNC,	22, GENL_doit(drbd_adm_resume_sync),

	GENL_tla_expected(DRBD_NLA_CFG_CONTEXT, GENLA_F_REQUIRED))

	GENL_tla_expected(DRBD_NLA_CFG_CONTEXT, DRBD_F_REQUIRED))

GENL_op(DRBD_ADM_SUSPEND_IO,	23, GENL_doit(drbd_adm_suspend_io),

	GENL_tla_expected(DRBD_NLA_CFG_CONTEXT, GENLA_F_REQUIRED))

	GENL_tla_expected(DRBD_NLA_CFG_CONTEXT, DRBD_F_REQUIRED))

GENL_op(DRBD_ADM_RESUME_IO,	24, GENL_doit(drbd_adm_resume_io),

	GENL_tla_expected(DRBD_NLA_CFG_CONTEXT, GENLA_F_REQUIRED))

	GENL_tla_expected(DRBD_NLA_CFG_CONTEXT, DRBD_F_REQUIRED))

GENL_op(DRBD_ADM_OUTDATE,	25, GENL_doit(drbd_adm_outdate),

	GENL_tla_expected(DRBD_NLA_CFG_CONTEXT, GENLA_F_REQUIRED))

	GENL_tla_expected(DRBD_NLA_CFG_CONTEXT, DRBD_F_REQUIRED))

GENL_op(DRBD_ADM_GET_TIMEOUT_TYPE, 26, GENL_doit(drbd_adm_get_timeout_type),

	GENL_tla_expected(DRBD_NLA_CFG_CONTEXT, GENLA_F_REQUIRED))

	GENL_tla_expected(DRBD_NLA_CFG_CONTEXT, DRBD_F_REQUIRED))

GENL_op(DRBD_ADM_DOWN,		27, GENL_doit(drbd_adm_down),

	GENL_tla_expected(DRBD_NLA_CFG_CONTEXT, GENLA_F_REQUIRED))
 
	GENL_tla_expected(DRBD_NLA_CFG_CONTEXT, DRBD_F_REQUIRED))

include/linux/genl_magic_func.h

+47 −60
Original line number Diff line number Diff line
@@ -3,53 +3,6 @@ 


#include <linux/genl_magic_struct.h>



/*

 * Extension of genl attribute validation policies			{{{1

 *									{{{2

 */



/**

 * nla_is_required - return true if this attribute is required

 * @nla: netlink attribute

 */

static inline int nla_is_required(const struct nlattr *nla)

{

        return nla->nla_type & GENLA_F_REQUIRED;

}



/**

 * nla_is_mandatory - return true if understanding this attribute is mandatory

 * @nla: netlink attribute

 * Note: REQUIRED attributes are implicitly MANDATORY as well

 */

static inline int nla_is_mandatory(const struct nlattr *nla)

{

        return nla->nla_type & (GENLA_F_MANDATORY | GENLA_F_REQUIRED);

}



/* Functionality to be integrated into nla_parse(), and validate_nla(),

 * respectively.

 *

 * Enforcing the "mandatory" bit is done here,

 * by rejecting unknown mandatory attributes.

 *

 * Part of enforcing the "required" flag would mean to embed it into

 * nla_policy.type, and extending validate_nla(), which currently does

 * BUG_ON(pt->type > NLA_TYPE_MAX); we have to work on existing kernels,

 * so we cannot do that.  Thats why enforcing "required" is done in the

 * generated assignment functions below. */

static int nla_check_unknown(int maxtype, struct nlattr *head, int len)

{

	struct nlattr *nla;

	int rem;

        nla_for_each_attr(nla, head, len, rem) {

		__u16 type = nla_type(nla);

		if (type > maxtype && nla_is_mandatory(nla))

			return -EOPNOTSUPP;

	}

	return 0;

}



/*

 * Magic: declare tla policy						{{{1

 * Magic: declare nested policies
@@ -80,12 +33,12 @@ static struct nla_policy s_name ## _nl_policy[] __read_mostly = \ 
#undef __field

#define __field(attr_nr, attr_flag, name, nla_type, _type, __get,	\

		 __put, __is_signed)					\

	[__nla_type(attr_nr)] = { .type = nla_type },

	[attr_nr] = { .type = nla_type },



#undef __array

#define __array(attr_nr, attr_flag, name, nla_type, _type, maxlen,	\

		__get, __put, __is_signed)				\

	[__nla_type(attr_nr)] = { .type = nla_type,			\

	[attr_nr] = { .type = nla_type,					\

		      .len = maxlen - (nla_type == NLA_NUL_STRING) },



#include GENL_MAGIC_INCLUDE_FILE
@@ -189,6 +142,43 @@ static struct nlattr *nested_attr_tb[128]; 
#define BUILD_BUG_ON_NULL(e) ((void *)sizeof(struct { int:-!!(e); }))

#endif



static inline int drbd_nla_check_mandatory(int maxtype, struct nlattr *nla)

{

	struct nlattr *head = nla_data(nla);

	int len = nla_len(nla);

	int rem;



	/*

	 * validate_nla (called from nla_parse_nested) ignores attributes

	 * beyond maxtype, and does not understand the DRBD_GENLA_F_MANDATORY flag.

	 * In order to have it validate attributes with the DRBD_GENLA_F_MANDATORY

	 * flag set also, check and remove that flag before calling

	 * nla_parse_nested.

	 */



	nla_for_each_attr(nla, head, len, rem) {

		if (nla->nla_type & DRBD_GENLA_F_MANDATORY) {

			if (nla_type(nla) > maxtype)

				return -EOPNOTSUPP;

			nla->nla_type &= ~DRBD_GENLA_F_MANDATORY;

		}

	}

	return 0;

}



static inline int drbd_nla_parse_nested(struct nlattr *tb[], int maxtype,

					struct nlattr *nla,

					const struct nla_policy *policy)

{

	int err;



	err = drbd_nla_check_mandatory(maxtype, nla);

	if (!err)

		err = nla_parse_nested(tb, maxtype, nla, policy);



	return err;

}



#undef GENL_struct

#define GENL_struct(tag_name, tag_number, s_name, s_fields)		\

/* *_from_attrs functions are static, but potentially unused */		\
@@ -204,10 +194,7 @@ static int __ ## s_name ## _from_attrs(struct s_name *s, \ 
	if (!tla)							\

		return -ENOMSG;						\

	DPRINT_TLA(#s_name, "<=-", #tag_name);				\

	err = nla_parse_nested(ntb, maxtype, tla, s_name ## _nl_policy); \

	if (err)							\

		return err;						\

	err = nla_check_unknown(maxtype, nla_data(tla), nla_len(tla));	\

	err = drbd_nla_parse_nested(ntb, maxtype, tla, s_name ## _nl_policy);	\

	if (err)							\

		return err;						\

									\
@@ -226,17 +213,17 @@ static int s_name ## _from_attrs_for_change(struct s_name *s, \ 
}					__attribute__((unused))		\



#define __assign(attr_nr, attr_flag, name, nla_type, type, assignment...)	\

		nla = ntb[__nla_type(attr_nr)];				\

		nla = ntb[attr_nr];						\

		if (nla) {						\

			if (exclude_invariants && ((attr_flag) & GENLA_F_INVARIANT)) {		\

			if (exclude_invariants && ((attr_flag) & DRBD_F_INVARIANT)) {		\

				pr_info("<< must not change invariant attr: %s\n", #name);	\

				return -EEXIST;				\

			}						\

			assignment;					\

		} else if (exclude_invariants && ((attr_flag) & GENLA_F_INVARIANT)) {		\

		} else if (exclude_invariants && ((attr_flag) & DRBD_F_INVARIANT)) {		\

			/* attribute missing from payload, */		\

			/* which was expected */			\

		} else if ((attr_flag) & GENLA_F_REQUIRED) {		\

		} else if ((attr_flag) & DRBD_F_REQUIRED) {		\

			pr_info("<< missing attr: %s\n", #name);	\

			return -ENOMSG;					\

		}
@@ -415,7 +402,7 @@ static inline int s_name ## _to_unpriv_skb(struct sk_buff *skb, \ 
#undef __field

#define __field(attr_nr, attr_flag, name, nla_type, type, __get, __put,	\

		__is_signed)						\

	if (!exclude_sensitive || !((attr_flag) & GENLA_F_SENSITIVE)) {	\

	if (!exclude_sensitive || !((attr_flag) & DRBD_F_SENSITIVE)) {	\

		DPRINT_FIELD(">>", nla_type, name, s, NULL);		\

		__put(skb, attr_nr, s->name);				\

	}
@@ -423,7 +410,7 @@ static inline int s_name ## _to_unpriv_skb(struct sk_buff *skb, \ 
#undef __array

#define __array(attr_nr, attr_flag, name, nla_type, type, maxlen,	\

		__get, __put, __is_signed)				\

	if (!exclude_sensitive || !((attr_flag) & GENLA_F_SENSITIVE)) {	\

	if (!exclude_sensitive || !((attr_flag) & DRBD_F_SENSITIVE)) {	\

		DPRINT_ARRAY(">>",nla_type, name, s, NULL);		\

		__put(skb, attr_nr, min_t(int, maxlen,			\

			s->name ## _len + (nla_type == NLA_NUL_STRING)),\

include/linux/genl_magic_struct.h

+24 −40

File changed.

Preview size limit exceeded, changes collapsed.

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