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drbd: New configuration parameters for dealing with network congestion

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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>
This commit is contained in:
Philipp Reisner 2010-10-27 11:12:07 +02:00
parent 759fbdfba6
commit 422028b1ca
4 changed files with 26 additions and 0 deletions
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7
include/linux/drbd.h
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@ -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