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authorPhilipp Reisner2010-04-26 14:11:45 +0200
committerPhilipp Reisner2010-05-18 01:19:51 +0200
commit6b4388ac1f282515db3a651707238cad00b50e80 (patch)
tree9288c637bdc8b171dbbe13aeedac7179fc9b4fcf /drivers/block
parent087c24925cf4209be1a91f8ede9241e17e9734c7 (diff)
drbd: Added transmission faults to the fault injection code
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
Diffstat (limited to 'drivers/block')
-rw-r--r--drivers/block/drbd/drbd_int.h1
-rw-r--r--drivers/block/drbd/drbd_main.c3
-rw-r--r--drivers/block/drbd/drbd_receiver.c8
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);