From 1dee3f59a8d5e711797dc82628aaf94a64e99922 Mon Sep 17 00:00:00 2001 From: Nicolas Dichtel Date: Mon, 9 May 2016 11:40:20 +0200 Subject: [PATCH] block/drbd: align properly u64 in nl messages The attribute 0 is never used in drbd, so let's use it as pad attribute in netlink messages. This minimizes the patch. Note that this patch is only compile-tested. Signed-off-by: Nicolas Dichtel Signed-off-by: Lars Ellenberg Signed-off-by: David S. Miller --- drivers/block/drbd/drbd_nl.c | 28 ++++++++++++++++------------ include/linux/genl_magic_struct.h | 7 ++++++- 2 files changed, 22 insertions(+), 13 deletions(-) diff --git a/drivers/block/drbd/drbd_nl.c b/drivers/block/drbd/drbd_nl.c index 1fd1dccebb6b..0bac9c8246bc 100644 --- a/drivers/block/drbd/drbd_nl.c +++ b/drivers/block/drbd/drbd_nl.c @@ -3633,14 +3633,15 @@ 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_0pad(skb, T_ed_uuid, device->ed_uuid) || + nla_put_u64_0pad(skb, T_capacity, + drbd_get_capacity(device->this_bdev)) || + nla_put_u64_0pad(skb, T_send_cnt, device->send_cnt) || + nla_put_u64_0pad(skb, T_recv_cnt, device->recv_cnt) || + nla_put_u64_0pad(skb, T_read_cnt, device->read_cnt) || + nla_put_u64_0pad(skb, T_writ_cnt, device->writ_cnt) || + nla_put_u64_0pad(skb, T_al_writ_cnt, device->al_writ_cnt) || + nla_put_u64_0pad(skb, T_bm_writ_cnt, device->bm_writ_cnt) || 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 +3658,16 @@ 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_0pad(skb, T_bits_total, drbd_bm_bits(device)) || + nla_put_u64_0pad(skb, T_bits_oos, + drbd_bm_total_weight(device))) 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_0pad(skb, T_bits_rs_total, + device->rs_total) || + nla_put_u64_0pad(skb, T_bits_rs_failed, + device->rs_failed)) goto nla_put_failure; } } diff --git a/include/linux/genl_magic_struct.h b/include/linux/genl_magic_struct.h index eecd19b37001..6270a56e5edc 100644 --- a/include/linux/genl_magic_struct.h +++ b/include/linux/genl_magic_struct.h @@ -62,6 +62,11 @@ extern void CONCAT_(GENL_MAGIC_FAMILY, _genl_unregister)(void); /* MAGIC helpers {{{2 */ +static inline int nla_put_u64_0pad(struct sk_buff *skb, int attrtype, u64 value) +{ + return nla_put_64bit(skb, attrtype, sizeof(u64), &value, 0); +} + /* possible field types */ #define __flg_field(attr_nr, attr_flag, name) \ __field(attr_nr, attr_flag, name, NLA_U8, char, \ @@ -80,7 +85,7 @@ extern void CONCAT_(GENL_MAGIC_FAMILY, _genl_unregister)(void); 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) + nla_get_u64, nla_put_u64_0pad, false) #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)