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drbd: Finished the "on-no-data-accessible suspend-io;" functionality

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When no data is accessible (no connection to the peer, nor a local disk)
allow the user to select to freeze all IO operations instead of getting
IO errors.

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 2010-05-31 10:14:17 +02:00
commit 265be2d098
9 changed files with 90 additions and 1 deletions
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5
include/linux/drbd.h
View file

@ -91,6 +91,11 @@ enum drbd_after_sb_p {
ASB_VIOLENTLY
};
enum drbd_on_no_data {
OND_IO_ERROR,
OND_SUSPEND_IO
};
/* KEEP the order, do not delete or insert. Only append. */
enum drbd_ret_codes {
ERR_CODE_BASE = 100,

1
include/linux/drbd_limits.h
View file

@ -128,6 +128,7 @@
#define DRBD_AFTER_SB_1P_DEF ASB_DISCONNECT
#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_MAX_BIO_BVECS_MIN 0
#define DRBD_MAX_BIO_BVECS_MAX 128

1
include/linux/drbd_nl.h
View file

@ -87,6 +87,7 @@ NL_PACKET(syncer_conf, 8,
NL_STRING( 51, T_MAY_IGNORE, cpu_mask, 32)
NL_STRING( 64, T_MAY_IGNORE, csums_alg, SHARED_SECRET_MAX)
NL_BIT( 65, T_MAY_IGNORE, use_rle)
NL_INTEGER( 75, T_MAY_IGNORE, on_no_data)
)
NL_PACKET(invalidate, 9, )