diff options
| author | Don Hiatt <don.hiatt@intel.com> | 2017-03-20 17:26:14 -0700 |
|---|---|---|
| committer | Doug Ledford <dledford@redhat.com> | 2017-04-05 14:45:09 -0400 |
| commit | 0181ce31b26021f7c2f9506112a05c847a36f0f2 (patch) | |
| tree | 9b31b878fdbdbe7a8c771bc46d8b841abd49751c /drivers/infiniband/hw/hfi1/driver.c | |
| parent | f7b42633720deb5ca8f4bcb175c7dc2933057e7f (diff) | |
IB/hfi1: Add receive fault injection feature
Add fault injection capability:
- Drop packets unconditionally (fault_by_packet)
- Drop packets based on opcode (fault_by_opcode)
This feature reacts to the global FAULT_INJECTION
config flag.
The faulting traces have been added:
- misc/fault_opcode
- misc/fault_packet
See 'Documentation/fault-injection/fault-injection.txt'
for details.
Examples:
- Dropping packets by opcode:
/sys/kernel/debug/hfi1/hfi1_X/fault_opcode
# Enable fault
echo Y > fault_by_opcode
# Setprobability of dropping (0-100%)
# echo 25 > probability
# Set opcode
echo 0x64 > opcode
# Number of times to fault
echo 3 > times
# An optional mask allows you to fault
# a range of opcodes
echo 0xf0 > mask
/sys/kernel/debug/hfi1/hfi1_X/fault_stats
contains a value in parentheses to indicate
number of each opcode dropped.
- Dropping packets unconditionally
/sys/kernel/debug/hfi1/hfi1_X/fault_packet
# Enable fault
echo Y > fault_by_packet
/sys/kernel/debug/hfi1/hfi1_X/fault_packet/fault_stats
contains the number of packets dropped.
Reviewed-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Don Hiatt <don.hiatt@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Diffstat (limited to 'drivers/infiniband/hw/hfi1/driver.c')
| -rw-r--r-- | drivers/infiniband/hw/hfi1/driver.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/hfi1/driver.c b/drivers/infiniband/hw/hfi1/driver.c index 3881c951f6af..c0b012f6e11c 100644 --- a/drivers/infiniband/hw/hfi1/driver.c +++ b/drivers/infiniband/hw/hfi1/driver.c @@ -59,6 +59,7 @@ #include "trace.h" #include "qp.h" #include "sdma.h" +#include "debugfs.h" #undef pr_fmt #define pr_fmt(fmt) DRIVER_NAME ": " fmt @@ -1354,6 +1355,9 @@ void handle_eflags(struct hfi1_packet *packet) */ int process_receive_ib(struct hfi1_packet *packet) { + if (unlikely(hfi1_dbg_fault_packet(packet))) + return RHF_RCV_CONTINUE; + trace_hfi1_rcvhdr(packet->rcd->ppd->dd, packet->rcd->ctxt, rhf_err_flags(packet->rhf), @@ -1409,6 +1413,8 @@ int process_receive_error(struct hfi1_packet *packet) int kdeth_process_expected(struct hfi1_packet *packet) { + if (unlikely(hfi1_dbg_fault_packet(packet))) + return RHF_RCV_CONTINUE; if (unlikely(rhf_err_flags(packet->rhf))) handle_eflags(packet); @@ -1421,6 +1427,8 @@ int kdeth_process_eager(struct hfi1_packet *packet) { if (unlikely(rhf_err_flags(packet->rhf))) handle_eflags(packet); + if (unlikely(hfi1_dbg_fault_packet(packet))) + return RHF_RCV_CONTINUE; dd_dev_err(packet->rcd->dd, "Unhandled eager packet received. Dropping.\n"); |