diff options
| author | Philipp Reisner <philipp.reisner@linbit.com> | 2010-10-27 11:12:07 +0200 |
|---|---|---|
| committer | Philipp Reisner <philipp.reisner@linbit.com> | 2011-03-10 11:34:45 +0100 |
| commit | 422028b1ca4c07995af82a18abced022ff4c296c (patch) | |
| tree | 87583c3aab3d8b39c5210de800d5eae79941dc25 | |
| parent | 759fbdfba66e620aceb3e73167e6003d1b8b0b0b (diff) | |
drbd: New configuration parameters for dealing with network congestion
net {
on_congestion {block|pull-ahead|disconnect};
congestion-fill {sectors};
congestion-extents {al-extents};
}
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
| -rw-r--r-- | drivers/block/drbd/drbd_nl.c | 7 | ||||
| -rw-r--r-- | include/linux/drbd.h | 7 | ||||
| -rw-r--r-- | include/linux/drbd_limits.h | 9 | ||||
| -rw-r--r-- | include/linux/drbd_nl.h | 3 |
4 files changed, 26 insertions, 0 deletions
diff --git a/drivers/block/drbd/drbd_nl.c b/drivers/block/drbd/drbd_nl.c index 9e27d82a9a1..f969d8717e2 100644 --- a/drivers/block/drbd/drbd_nl.c +++ b/drivers/block/drbd/drbd_nl.c @@ -1323,6 +1323,8 @@ static int drbd_nl_net_conf(struct drbd_conf *mdev, struct drbd_nl_cfg_req *nlp, new_conf->wire_protocol = DRBD_PROT_C; new_conf->ping_timeo = DRBD_PING_TIMEO_DEF; new_conf->rr_conflict = DRBD_RR_CONFLICT_DEF; + new_conf->on_congestion = DRBD_ON_CONGESTION_DEF; + new_conf->cong_extents = DRBD_CONG_EXTENTS_DEF; if (!net_conf_from_tags(mdev, nlp->tag_list, new_conf)) { retcode = ERR_MANDATORY_TAG; @@ -1344,6 +1346,11 @@ static int drbd_nl_net_conf(struct drbd_conf *mdev, struct drbd_nl_cfg_req *nlp, } } + if (new_conf->on_congestion != OC_BLOCK && new_conf->wire_protocol != DRBD_PROT_A) { + retcode = ERR_CONG_NOT_PROTO_A; + goto fail; + } + if (mdev->state.role == R_PRIMARY && new_conf->want_lose) { retcode = ERR_DISCARD; goto fail; diff --git a/include/linux/drbd.h b/include/linux/drbd.h index ef44c7a0638..03a08baabf1 100644 --- a/include/linux/drbd.h +++ b/include/linux/drbd.h @@ -96,6 +96,12 @@ enum drbd_on_no_data { OND_SUSPEND_IO }; +enum drbd_on_congestion { + OC_BLOCK, + OC_PULL_AHEAD, + OC_DISCONNECT, +}; + /* KEEP the order, do not delete or insert. Only append. */ enum drbd_ret_codes { ERR_CODE_BASE = 100, @@ -146,6 +152,7 @@ enum drbd_ret_codes { ERR_PERM = 152, ERR_NEED_APV_93 = 153, ERR_STONITH_AND_PROT_A = 154, + ERR_CONG_NOT_PROTO_A = 155, /* insert new ones above this line */ AFTER_LAST_ERR_CODE diff --git a/include/linux/drbd_limits.h b/include/linux/drbd_limits.h index 4ac33f34b77..abf418724e5 100644 --- a/include/linux/drbd_limits.h +++ b/include/linux/drbd_limits.h @@ -129,6 +129,7 @@ #define DRBD_AFTER_SB_2P_DEF ASB_DISCONNECT #define DRBD_RR_CONFLICT_DEF ASB_DISCONNECT #define DRBD_ON_NO_DATA_DEF OND_IO_ERROR +#define DRBD_ON_CONGESTION_DEF OC_BLOCK #define DRBD_MAX_BIO_BVECS_MIN 0 #define DRBD_MAX_BIO_BVECS_MAX 128 @@ -154,5 +155,13 @@ #define DRBD_C_MIN_RATE_MAX (4 << 20) #define DRBD_C_MIN_RATE_DEF 4096 +#define DRBD_CONG_FILL_MIN 0 +#define DRBD_CONG_FILL_MAX (10<<21) /* 10GByte in sectors */ +#define DRBD_CONG_FILL_DEF 0 + +#define DRBD_CONG_EXTENTS_MIN DRBD_AL_EXTENTS_MIN +#define DRBD_CONG_EXTENTS_MAX DRBD_AL_EXTENTS_MAX +#define DRBD_CONG_EXTENTS_DEF DRBD_AL_EXTENTS_DEF + #undef RANGE #endif diff --git a/include/linux/drbd_nl.h b/include/linux/drbd_nl.h index ade91107c9a..8cde3945d1f 100644 --- a/include/linux/drbd_nl.h +++ b/include/linux/drbd_nl.h @@ -56,6 +56,9 @@ NL_PACKET(net_conf, 5, NL_INTEGER( 39, T_MAY_IGNORE, rr_conflict) NL_INTEGER( 40, T_MAY_IGNORE, ping_timeo) NL_INTEGER( 67, T_MAY_IGNORE, rcvbuf_size) + NL_INTEGER( 81, T_MAY_IGNORE, on_congestion) + NL_INTEGER( 82, T_MAY_IGNORE, cong_fill) + NL_INTEGER( 83, T_MAY_IGNORE, cong_extents) /* 59 addr_family was available in GIT, never released */ NL_BIT( 60, T_MANDATORY, mind_af) NL_BIT( 27, T_MAY_IGNORE, want_lose) |