Two new handlers have been defined in genl_magic_ headers:
- __field2: the corresponding nla_put() function (nla_put_flag()) takes
only two args
- __field4: the corresponding nla_put() function (nla_put_u64_64bit())
takes four args
__field2 allows us to define __unspec_field for padding attribute.
__field4 allows us to update the definition of __u64_field: the pad
attribute should now be specified.
Note that this patch is only compile-tested.
Signed-off-by: Nicolas Dichtel <nicolas.dich...@6wind.com>
---
v1 -> v2:
rework the patch to handle all cases
drivers/block/drbd/drbd_nl.c | 40 +++++++++++++++++--------
include/linux/drbd_genl.h | 62 +++++++++++++++++++++------------------
include/linux/genl_magic_func.h | 41 ++++++++++++++++++++++++++
include/linux/genl_magic_struct.h | 45 ++++++++++++++++++++++++++--
4 files changed, 145 insertions(+), 43 deletions(-)
diff --git a/drivers/block/drbd/drbd_nl.c b/drivers/block/drbd/drbd_nl.c
index 1fd1dccebb6b..93d873532195 100644
--- a/drivers/block/drbd/drbd_nl.c
+++ b/drivers/block/drbd/drbd_nl.c
@@ -3633,14 +3633,23 @@ static int nla_put_status_info(struct sk_buff *skb,
struct drbd_device *device,
goto nla_put_failure;
if (nla_put_u32(skb, T_sib_reason, sib ? sib->sib_reason :
SIB_GET_STATUS_REPLY) ||
nla_put_u32(skb, T_current_state, device->state.i) ||
- nla_put_u64(skb, T_ed_uuid, device->ed_uuid) ||
- nla_put_u64(skb, T_capacity, drbd_get_capacity(device->this_bdev))
||
- nla_put_u64(skb, T_send_cnt, device->send_cnt) ||
- nla_put_u64(skb, T_recv_cnt, device->recv_cnt) ||
- nla_put_u64(skb, T_read_cnt, device->read_cnt) ||
- nla_put_u64(skb, T_writ_cnt, device->writ_cnt) ||
- nla_put_u64(skb, T_al_writ_cnt, device->al_writ_cnt) ||
- nla_put_u64(skb, T_bm_writ_cnt, device->bm_writ_cnt) ||
+ nla_put_u64_64bit(skb, T_ed_uuid, device->ed_uuid,
+ T_state_info_pad) ||
+ nla_put_u64_64bit(skb, T_capacity,
+ drbd_get_capacity(device->this_bdev),
+ T_state_info_pad) ||
+ nla_put_u64_64bit(skb, T_send_cnt, device->send_cnt,
+ T_state_info_pad) ||
+ nla_put_u64_64bit(skb, T_recv_cnt, device->recv_cnt,
+ T_state_info_pad) ||
+ nla_put_u64_64bit(skb, T_read_cnt, device->read_cnt,
+ T_state_info_pad) ||
+ nla_put_u64_64bit(skb, T_writ_cnt, device->writ_cnt,
+ T_state_info_pad) ||
+ nla_put_u64_64bit(skb, T_al_writ_cnt, device->al_writ_cnt,
+ T_state_info_pad) ||
+ nla_put_u64_64bit(skb, T_bm_writ_cnt, device->bm_writ_cnt,
+ T_state_info_pad) ||
nla_put_u32(skb, T_ap_bio_cnt, atomic_read(&device->ap_bio_cnt)) ||
nla_put_u32(skb, T_ap_pending_cnt,
atomic_read(&device->ap_pending_cnt)) ||
nla_put_u32(skb, T_rs_pending_cnt,
atomic_read(&device->rs_pending_cnt)))
@@ -3657,13 +3666,20 @@ static int nla_put_status_info(struct sk_buff *skb,
struct drbd_device *device,
goto nla_put_failure;
if (nla_put_u32(skb, T_disk_flags, device->ldev->md.flags) ||
- nla_put_u64(skb, T_bits_total, drbd_bm_bits(device)) ||
- nla_put_u64(skb, T_bits_oos, drbd_bm_total_weight(device)))
+ nla_put_u64_64bit(skb, T_bits_total, drbd_bm_bits(device),
+ T_state_info_pad) ||
+ nla_put_u64_64bit(skb, T_bits_oos,
+ drbd_bm_total_weight(device),
+ T_state_info_pad))
goto nla_put_failure;
if (C_SYNC_SOURCE <= device->state.conn &&
C_PAUSED_SYNC_T >= device->state.conn) {
- if (nla_put_u64(skb, T_bits_rs_total, device->rs_total)
||
- nla_put_u64(skb, T_bits_rs_failed,
device->rs_failed))
+ if (nla_put_u64_64bit(skb, T_bits_rs_total,
+ device->rs_total,
+ T_state_info_pad) ||
+ nla_put_u64_64bit(skb, T_bits_rs_failed,
+ device->rs_failed,
+ T_state_info_pad))
goto nla_put_failure;
}
}
diff --git a/include/linux/drbd_genl.h b/include/linux/drbd_genl.h
index 2d0e5ad5de9d..f3b810089142 100644
--- a/include/linux/drbd_genl.h
+++ b/include/linux/drbd_genl.h
@@ -107,7 +107,7 @@ GENL_struct(DRBD_NLA_DISK_CONF, 3, disk_conf,
__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, DRBD_GENLA_F_MANDATORY | DRBD_F_INVARIANT,
disk_size)
+ __u64_field(4, DRBD_GENLA_F_MANDATORY | DRBD_F_INVARIANT,
disk_size, 24)
/* we could change the max_bio_bvecs,
* but it won't propagate through the stack */
__u32_field(5, DRBD_GENLA_F_MANDATORY | DRBD_F_INVARIANT,
max_bio_bvecs)
@@ -132,6 +132,7 @@ GENL_struct(DRBD_NLA_DISK_CONF, 3, disk_conf,
__u32_field_def(21, 0 /* OPTIONAL */, read_balancing,
DRBD_READ_BALANCING_DEF)
/* 9: __u32_field_def(22, DRBD_GENLA_F_MANDATORY,
unplug_watermark, DRBD_UNPLUG_WATERMARK_DEF) */
__flg_field_def(23, 0 /* OPTIONAL */, al_updates,
DRBD_AL_UPDATES_DEF)
+ __unspec_field(24, 0 , disk_conf_pad)
)
GENL_struct(DRBD_NLA_RESOURCE_OPTS, 4, res_opts,
@@ -182,11 +183,12 @@ GENL_struct(DRBD_NLA_SET_ROLE_PARMS, 6, set_role_parms,
)
GENL_struct(DRBD_NLA_RESIZE_PARMS, 7, resize_parms,
- __u64_field(1, DRBD_GENLA_F_MANDATORY, resize_size)
+ __u64_field(1, DRBD_GENLA_F_MANDATORY, resize_size, 6)
__flg_field(2, DRBD_GENLA_F_MANDATORY, resize_force)
__flg_field(3, DRBD_GENLA_F_MANDATORY, no_resync)
__u32_field_def(4, 0 /* OPTIONAL */, al_stripes, DRBD_AL_STRIPES_DEF)
__u32_field_def(5, 0 /* OPTIONAL */, al_stripe_size,
DRBD_AL_STRIPE_SIZE_DEF)
+ __unspec_field(6, 0, resize_parms_pad)
)
GENL_struct(DRBD_NLA_STATE_INFO, 8, state_info,
@@ -194,8 +196,8 @@ GENL_struct(DRBD_NLA_STATE_INFO, 8, state_info,
* if this is an event triggered broadcast. */
__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)
+ __u64_field(3, DRBD_GENLA_F_MANDATORY, capacity, 24)
+ __u64_field(4, DRBD_GENLA_F_MANDATORY, ed_uuid, 24)
/* These are for broadcast from after state change work.
* prev_state and new_state are from the moment the state change took
@@ -208,30 +210,32 @@ GENL_struct(DRBD_NLA_STATE_INFO, 8, state_info,
/* if we have a local disk: */
__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)
+ __u64_field(9, DRBD_GENLA_F_MANDATORY, bits_total, 24)
+ __u64_field(10, DRBD_GENLA_F_MANDATORY, bits_oos, 24)
/* and in case resync or online verify is active */
- __u64_field(11, DRBD_GENLA_F_MANDATORY, bits_rs_total)
- __u64_field(12, DRBD_GENLA_F_MANDATORY, bits_rs_failed)
+ __u64_field(11, DRBD_GENLA_F_MANDATORY, bits_rs_total, 24)
+ __u64_field(12, DRBD_GENLA_F_MANDATORY, bits_rs_failed, 24)
/* for pre and post notifications of helper execution */
__str_field(13, DRBD_GENLA_F_MANDATORY, helper, 32)
__u32_field(14, DRBD_GENLA_F_MANDATORY, helper_exit_code)
- __u64_field(15, 0, send_cnt)
- __u64_field(16, 0, recv_cnt)
- __u64_field(17, 0, read_cnt)
- __u64_field(18, 0, writ_cnt)
- __u64_field(19, 0, al_writ_cnt)
- __u64_field(20, 0, bm_writ_cnt)
+ __u64_field(15, 0, send_cnt, 24)
+ __u64_field(16, 0, recv_cnt, 24)
+ __u64_field(17, 0, read_cnt, 24)
+ __u64_field(18, 0, writ_cnt, 24)
+ __u64_field(19, 0, al_writ_cnt, 24)
+ __u64_field(20, 0, bm_writ_cnt, 24)
__u32_field(21, 0, ap_bio_cnt)
__u32_field(22, 0, ap_pending_cnt)
__u32_field(23, 0, rs_pending_cnt)
+ __unspec_field(24, 0, state_info_pad)
)
GENL_struct(DRBD_NLA_START_OV_PARMS, 9, start_ov_parms,
- __u64_field(1, DRBD_GENLA_F_MANDATORY, ov_start_sector)
- __u64_field(2, DRBD_GENLA_F_MANDATORY, ov_stop_sector)
+ __u64_field(1, DRBD_GENLA_F_MANDATORY, ov_start_sector, 3)
+ __u64_field(2, DRBD_GENLA_F_MANDATORY, ov_stop_sector, 3)
+ __unspec_field(3, 0, ov_pad)
)
GENL_struct(DRBD_NLA_NEW_C_UUID_PARMS, 10, new_c_uuid_parms,
@@ -280,20 +284,21 @@ GENL_struct(DRBD_NLA_RESOURCE_STATISTICS, 19,
resource_statistics,
)
GENL_struct(DRBD_NLA_DEVICE_STATISTICS, 20, device_statistics,
- __u64_field(1, 0, dev_size) /* (sectors) */
- __u64_field(2, 0, dev_read) /* (sectors) */
- __u64_field(3, 0, dev_write) /* (sectors) */
- __u64_field(4, 0, dev_al_writes) /* activity log writes (count) */
- __u64_field(5, 0, dev_bm_writes) /* bitmap writes (count) */
+ __u64_field(1, 0, dev_size, 15) /* (sectors) */
+ __u64_field(2, 0, dev_read, 15) /* (sectors) */
+ __u64_field(3, 0, dev_write, 15) /* (sectors) */
+ __u64_field(4, 0, dev_al_writes, 15) /* activity log writes (count) */
+ __u64_field(5, 0, dev_bm_writes, 15) /* bitmap writes (count) */
__u32_field(6, 0, dev_upper_pending) /* application requests in
progress */
__u32_field(7, 0, dev_lower_pending) /* backing device requests in
progress */
__flg_field(8, 0, dev_upper_blocked)
__flg_field(9, 0, dev_lower_blocked)
__flg_field(10, 0, dev_al_suspended) /* activity log suspended */
- __u64_field(11, 0, dev_exposed_data_uuid)
- __u64_field(12, 0, dev_current_uuid)
+ __u64_field(11, 0, dev_exposed_data_uuid, 15)
+ __u64_field(12, 0, dev_current_uuid, 15)
__u32_field(13, 0, dev_disk_flags)
__bin_field(14, 0, history_uuids, HISTORY_UUIDS * sizeof(__u64))
+ __unspec_field(15, 0, dev_pad)
)
GENL_struct(DRBD_NLA_CONNECTION_STATISTICS, 21, connection_statistics,
@@ -301,14 +306,15 @@ GENL_struct(DRBD_NLA_CONNECTION_STATISTICS, 21,
connection_statistics,
)
GENL_struct(DRBD_NLA_PEER_DEVICE_STATISTICS, 22, peer_device_statistics,
- __u64_field(1, 0, peer_dev_received) /* sectors */
- __u64_field(2, 0, peer_dev_sent) /* sectors */
+ __u64_field(1, 0, peer_dev_received, 10) /* sectors */
+ __u64_field(2, 0, peer_dev_sent, 10) /* sectors */
__u32_field(3, 0, peer_dev_pending) /* number of requests */
__u32_field(4, 0, peer_dev_unacked) /* number of requests */
- __u64_field(5, 0, peer_dev_out_of_sync) /* sectors */
- __u64_field(6, 0, peer_dev_resync_failed) /* sectors */
- __u64_field(7, 0, peer_dev_bitmap_uuid)
+ __u64_field(5, 0, peer_dev_out_of_sync, 10) /* sectors */
+ __u64_field(6, 0, peer_dev_resync_failed, 10) /* sectors */
+ __u64_field(7, 0, peer_dev_bitmap_uuid, 10)
__u32_field(9, 0, peer_dev_flags)
+ __unspec_field(10, 0, peer_dev_pad)
)
GENL_struct(DRBD_NLA_NOTIFICATION_HEADER, 23, drbd_notification_header,
diff --git a/include/linux/genl_magic_func.h b/include/linux/genl_magic_func.h
index 667c31101b8b..34b12f0836a5 100644
--- a/include/linux/genl_magic_func.h
+++ b/include/linux/genl_magic_func.h
@@ -35,6 +35,15 @@ static struct nla_policy s_name ## _nl_policy[]
__read_mostly = \
__put, __is_signed) \
[attr_nr] = { .type = nla_type },
+#undef __field2
+#define __field2 __field
+
+#undef __field4
+#define __field4(attr_nr, attr_flag, name, nla_type, _type, __get, \
+ __put, __is_signed, padattr) \
+ __field(attr_nr, attr_flag, name, nla_type, _type, __get, \
+ __put, __is_signed)
+
#undef __array
#define __array(attr_nr, attr_flag, name, nla_type, _type, maxlen, \
__get, __put, __is_signed) \
@@ -199,6 +208,15 @@ static int s_name ## _from_attrs_for_change(struct s_name
*s, \
s->name = __get(nla); \
DPRINT_FIELD("<<", nla_type, name, s, nla))
+#undef __field2
+#define __field2 __field
+
+#undef __field4
+#define __field4(attr_nr, attr_flag, name, nla_type, _type, __get, \
+ __put, __is_signed, padattr) \
+ __field(attr_nr, attr_flag, name, nla_type, _type, __get, \
+ __put, __is_signed)
+
/* validate_nla() already checked nla_len <= maxlen appropriately. */
#undef __array
#define __array(attr_nr, attr_flag, name, nla_type, type, maxlen, \
@@ -362,6 +380,24 @@ static inline int s_name ## _to_unpriv_skb(struct sk_buff
*skb, \
goto nla_put_failure; \
}
+#undef __field2
+#define __field2(attr_nr, attr_flag, name, nla_type, type, __get, __put,\
+ __is_signed) \
+ if (!exclude_sensitive || !((attr_flag) & DRBD_F_SENSITIVE)) { \
+ DPRINT_FIELD(">>", nla_type, name, s, NULL); \
+ if (__put(skb, attr_nr)) \
+ goto nla_put_failure; \
+ }
+
+#undef __field4
+#define __field4(attr_nr, attr_flag, name, nla_type, type, __get, __put,\
+ __is_signed, padattr) \
+ if (!exclude_sensitive || !((attr_flag) & DRBD_F_SENSITIVE)) { \
+ DPRINT_FIELD(">>", nla_type, name, s, NULL); \
+ if (__put(skb, attr_nr, s->name, padattr)) \
+ goto nla_put_failure; \
+ }
+
#undef __array
#define __array(attr_nr, attr_flag, name, nla_type, type, maxlen, \
__get, __put, __is_signed) \
@@ -381,6 +417,11 @@ 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)
+#undef __field2
+#define __field2 __field
+#undef __field4
+#define __field4(attr_nr, attr_flag, name, nla_type, type, __get, __put,\
+ __is_signed, padattr)
#undef __array
#define __array(attr_nr, attr_flag, name, nla_type, type, maxlen, \
__get, __put, __is_signed)
diff --git a/include/linux/genl_magic_struct.h
b/include/linux/genl_magic_struct.h
index eecd19b37001..768e63406540 100644
--- a/include/linux/genl_magic_struct.h
+++ b/include/linux/genl_magic_struct.h
@@ -66,6 +66,9 @@ extern void CONCAT_(GENL_MAGIC_FAMILY,
_genl_unregister)(void);
#define __flg_field(attr_nr, attr_flag, name) \
__field(attr_nr, attr_flag, name, NLA_U8, char, \
nla_get_u8, nla_put_u8, false)
+#define __unspec_field(attr_nr, attr_flag, name) \
+ __field2(attr_nr, attr_flag, name, NLA_UNSPEC, unsigned char, \
+ nla_get_flag, nla_put_flag, false)
#define __u8_field(attr_nr, attr_flag, name) \
__field(attr_nr, attr_flag, name, NLA_U8, unsigned char, \
nla_get_u8, nla_put_u8, false)
@@ -78,9 +81,9 @@ extern void CONCAT_(GENL_MAGIC_FAMILY,
_genl_unregister)(void);
#define __s32_field(attr_nr, attr_flag, name) \
__field(attr_nr, attr_flag, name, NLA_U32, __s32, \
nla_get_u32, nla_put_u32, true)
-#define __u64_field(attr_nr, attr_flag, name) \
- __field(attr_nr, attr_flag, name, NLA_U64, __u64, \
- nla_get_u64, nla_put_u64, false)
+#define __u64_field(attr_nr, attr_flag, name, padattr) \
+ __field4(attr_nr, attr_flag, name, NLA_U64, __u64, \
+ nla_get_u64, nla_put_u64_64bit, false, padattr)
#define __str_field(attr_nr, attr_flag, name, maxlen) \
__array(attr_nr, attr_flag, name, NLA_NUL_STRING, char, maxlen, \
nla_strlcpy, nla_put, false)
@@ -156,6 +159,15 @@ enum {
\
__get, __put, __is_signed) \
T_ ## name = (__u16)(attr_nr | ((attr_flag) & DRBD_GENLA_F_MANDATORY)),
+#undef __field2
+#define __field2 __field
+
+#undef __field4
+#define __field4(attr_nr, attr_flag, name, nla_type, _type, __get, \
+ __put, __is_signed, padattr) \
+ __field(attr_nr, attr_flag, name, nla_type, _type, __get, \
+ __put, __is_signed)
+
#undef __array
#define __array(attr_nr, attr_flag, name, nla_type, type, \
maxlen, __get, __put, __is_signed) \
@@ -222,6 +234,15 @@ static inline void ct_assert_unique_ ## s_name ##
_attributes(void) \
__is_signed) \
case attr_nr:
+#undef __field2
+#define __field2 __field
+
+#undef __field4
+#define __field4(attr_nr, attr_flag, name, nla_type, _type, __get, \
+ __put, __is_signed, padattr) \
+ __field(attr_nr, attr_flag, name, nla_type, _type, __get, \
+ __put, __is_signed)
+
#undef __array
#define __array(attr_nr, attr_flag, name, nla_type, type, maxlen, \
__get, __put, __is_signed) \
@@ -246,6 +267,15 @@ struct s_name { s_fields };
__is_signed) \
type name;
+#undef __field2
+#define __field2 __field
+
+#undef __field4
+#define __field4(attr_nr, attr_flag, name, nla_type, _type, __get, \
+ __put, __is_signed, padattr) \
+ __field(attr_nr, attr_flag, name, nla_type, _type, __get, \
+ __put, __is_signed)
+
#undef __array
#define __array(attr_nr, attr_flag, name, nla_type, type, maxlen, \
__get, __put, __is_signed) \
@@ -265,6 +295,15 @@ enum {
\
is_signed) \
F_ ## name ## _IS_SIGNED = is_signed,
+#undef __field2
+#define __field2 __field
+
+#undef __field4
+#define __field4(attr_nr, attr_flag, name, nla_type, _type, __get, \
+ __put, __is_signed, padattr) \
+ __field(attr_nr, attr_flag, name, nla_type, _type, __get, \
+ __put, __is_signed)
+
#undef __array
#define __array(attr_nr, attr_flag, name, nla_type, type, maxlen, \
__get, __put, is_signed) \
--
2.8.1
