From 6b4388ac1f282515db3a651707238cad00b50e80 Mon Sep 17 00:00:00 2001 From: Philipp Reisner Date: Mon, 26 Apr 2010 14:11:45 +0200 Subject: [PATCH] drbd: Added transmission faults to the fault injection code Signed-off-by: Philipp Reisner Signed-off-by: Lars Ellenberg --- drivers/block/drbd/drbd_int.h | 1 + drivers/block/drbd/drbd_main.c | 3 ++- drivers/block/drbd/drbd_receiver.c | 8 +++++++- 3 files changed, 10 insertions(+), 2 deletions(-) diff --git a/drivers/block/drbd/drbd_int.h b/drivers/block/drbd/drbd_int.h index e09132483980..2409de12f013 100644 --- a/drivers/block/drbd/drbd_int.h +++ b/drivers/block/drbd/drbd_int.h @@ -132,6 +132,7 @@ enum { DRBD_FAULT_DT_RA = 6, /* data read ahead */ DRBD_FAULT_BM_ALLOC = 7, /* bitmap allocation */ DRBD_FAULT_AL_EE = 8, /* alloc ee */ + DRBD_FAULT_RECEIVE = 9, /* Changes some bytes upon receiving a [rs]data block */ DRBD_FAULT_MAX, }; diff --git a/drivers/block/drbd/drbd_main.c b/drivers/block/drbd/drbd_main.c index a478dad82dae..7468d2ce7347 100644 --- a/drivers/block/drbd/drbd_main.c +++ b/drivers/block/drbd/drbd_main.c @@ -3668,7 +3668,8 @@ _drbd_fault_str(unsigned int type) { [DRBD_FAULT_DT_RD] = "Data read", [DRBD_FAULT_DT_RA] = "Data read ahead", [DRBD_FAULT_BM_ALLOC] = "BM allocation", - [DRBD_FAULT_AL_EE] = "EE allocation" + [DRBD_FAULT_AL_EE] = "EE allocation", + [DRBD_FAULT_RECEIVE] = "receive data corruption", }; return (type < DRBD_FAULT_MAX) ? _faults[type] : "**Unknown**"; diff --git a/drivers/block/drbd/drbd_receiver.c b/drivers/block/drbd/drbd_receiver.c index 11b1bafde28b..b27f4dd36f89 100644 --- a/drivers/block/drbd/drbd_receiver.c +++ b/drivers/block/drbd/drbd_receiver.c @@ -1270,6 +1270,7 @@ read_in_block(struct drbd_conf *mdev, u64 id, sector_t sector, int data_size) __ int dgs, ds, i, rr; void *dig_in = mdev->int_dig_in; void *dig_vv = mdev->int_dig_vv; + unsigned long *data; dgs = (mdev->agreed_pro_version >= 87 && mdev->integrity_r_tfm) ? crypto_hash_digestsize(mdev->integrity_r_tfm) : 0; @@ -1307,7 +1308,12 @@ read_in_block(struct drbd_conf *mdev, u64 id, sector_t sector, int data_size) __ ds = data_size; bio_for_each_segment(bvec, bio, i) { page = bvec->bv_page; - rr = drbd_recv(mdev, kmap(page), min_t(int, ds, PAGE_SIZE)); + data = kmap(page); + rr = drbd_recv(mdev, data, min_t(int, ds, PAGE_SIZE)); + if (FAULT_ACTIVE(mdev, DRBD_FAULT_RECEIVE)) { + dev_err(DEV, "Fault injection: Corrupting data on receive\n"); + data[0] = data[0] ^ (unsigned long)-1; + } kunmap(page); if (rr != min_t(int, ds, PAGE_SIZE)) { drbd_free_ee(mdev, e); -- 2.20.1