1 files changed, 0 insertions, 172 deletions
diff --git a/Documentation/fault-injection/nvme-fault-injection.txt b/Documentation/fault-injection/nvme-fault-injection.txt
deleted file mode 100644
index efcb339a3add..000000000000
--- a/Documentation/fault-injection/nvme-fault-injection.txt
+++ /dev/null
@@ -1,172 +0,0 @@
-NVMe Fault Injection
-====================
-Linux's fault injection framework provides a systematic way to support
-error injection via debugfs in the /sys/kernel/debug directory. When
-enabled, the default NVME_SC_INVALID_OPCODE with no retry will be
-injected into the nvme_end_request. Users can change the default status
-code and no retry flag via the debugfs. The list of Generic Command
-Status can be found in include/linux/nvme.h
-
-Following examples show how to inject an error into the nvme.
-
-First, enable CONFIG_FAULT_INJECTION_DEBUG_FS kernel config,
-recompile the kernel. After booting up the kernel, do the
-following.
-
-Example 1: Inject default status code with no retry
----------------------------------------------------
-
-mount /dev/nvme0n1 /mnt
-echo 1 > /sys/kernel/debug/nvme0n1/fault_inject/times
-echo 100 > /sys/kernel/debug/nvme0n1/fault_inject/probability
-cp a.file /mnt
-
-Expected Result:
-
-cp: cannot stat ‘/mnt/a.file’: Input/output error
-
-Message from dmesg:
-
-FAULT_INJECTION: forcing a failure.
-name fault_inject, interval 1, probability 100, space 0, times 1
-CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.15.0-rc8+ #2
-Hardware name: innotek GmbH VirtualBox/VirtualBox,
-BIOS VirtualBox 12/01/2006
-Call Trace:
-  <IRQ>
-  dump_stack+0x5c/0x7d
-  should_fail+0x148/0x170
-  nvme_should_fail+0x2f/0x50 [nvme_core]
-  nvme_process_cq+0xe7/0x1d0 [nvme]
-  nvme_irq+0x1e/0x40 [nvme]
-  __handle_irq_event_percpu+0x3a/0x190
-  handle_irq_event_percpu+0x30/0x70
-  handle_irq_event+0x36/0x60
-  handle_fasteoi_irq+0x78/0x120
-  handle_irq+0xa7/0x130
-  ? tick_irq_enter+0xa8/0xc0
-  do_IRQ+0x43/0xc0
-  common_interrupt+0xa2/0xa2
-  </IRQ>
-RIP: 0010:native_safe_halt+0x2/0x10
-RSP: 0018:ffffffff82003e90 EFLAGS: 00000246 ORIG_RAX: ffffffffffffffdd
-RAX: ffffffff817a10c0 RBX: ffffffff82012480 RCX: 0000000000000000
-RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
-RBP: 0000000000000000 R08: 000000008e38ce64 R09: 0000000000000000
-R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff82012480
-R13: ffffffff82012480 R14: 0000000000000000 R15: 0000000000000000
-  ? __sched_text_end+0x4/0x4
-  default_idle+0x18/0xf0
-  do_idle+0x150/0x1d0
-  cpu_startup_entry+0x6f/0x80
-  start_kernel+0x4c4/0x4e4
-  ? set_init_arg+0x55/0x55
-  secondary_startup_64+0xa5/0xb0
-  print_req_error: I/O error, dev nvme0n1, sector 9240
-EXT4-fs error (device nvme0n1): ext4_find_entry:1436:
-inode #2: comm cp: reading directory lblock 0
-
-Example 2: Inject default status code with retry
-------------------------------------------------
-
-mount /dev/nvme0n1 /mnt
-echo 1 > /sys/kernel/debug/nvme0n1/fault_inject/times
-echo 100 > /sys/kernel/debug/nvme0n1/fault_inject/probability
-echo 1 > /sys/kernel/debug/nvme0n1/fault_inject/status
-echo 0 > /sys/kernel/debug/nvme0n1/fault_inject/dont_retry
-
-cp a.file /mnt
-
-Expected Result:
-
-command success without error
-
-Message from dmesg:
-
-FAULT_INJECTION: forcing a failure.
-name fault_inject, interval 1, probability 100, space 0, times 1
-CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.15.0-rc8+ #4
-Hardware name: innotek GmbH VirtualBox/VirtualBox, BIOS VirtualBox 12/01/2006
-Call Trace:
-  <IRQ>
-  dump_stack+0x5c/0x7d
-  should_fail+0x148/0x170
-  nvme_should_fail+0x30/0x60 [nvme_core]
-  nvme_loop_queue_response+0x84/0x110 [nvme_loop]
-  nvmet_req_complete+0x11/0x40 [nvmet]
-  nvmet_bio_done+0x28/0x40 [nvmet]
-  blk_update_request+0xb0/0x310
-  blk_mq_end_request+0x18/0x60
-  flush_smp_call_function_queue+0x3d/0xf0
-  smp_call_function_single_interrupt+0x2c/0xc0
-  call_function_single_interrupt+0xa2/0xb0
-  </IRQ>
-RIP: 0010:native_safe_halt+0x2/0x10
-RSP: 0018:ffffc9000068bec0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff04
-RAX: ffffffff817a10c0 RBX: ffff88011a3c9680 RCX: 0000000000000000
-RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
-RBP: 0000000000000001 R08: 000000008e38c131 R09: 0000000000000000
-R10: 0000000000000000 R11: 0000000000000000 R12: ffff88011a3c9680
-R13: ffff88011a3c9680 R14: 0000000000000000 R15: 0000000000000000
-  ? __sched_text_end+0x4/0x4
-  default_idle+0x18/0xf0
-  do_idle+0x150/0x1d0
-  cpu_startup_entry+0x6f/0x80
-  start_secondary+0x187/0x1e0
-  secondary_startup_64+0xa5/0xb0
-
-Example 3: Inject an error into the 10th admin command
-------------------------------------------------------
-
-echo 100 > /sys/kernel/debug/nvme0/fault_inject/probability
-echo 10 > /sys/kernel/debug/nvme0/fault_inject/space
-echo 1 > /sys/kernel/debug/nvme0/fault_inject/times
-nvme reset /dev/nvme0
-
-Expected Result:
-
-After NVMe controller reset, the reinitialization may or may not succeed.
-It depends on which admin command is actually forced to fail.
-
-Message from dmesg:
-
-nvme nvme0: resetting controller
-FAULT_INJECTION: forcing a failure.
-name fault_inject, interval 1, probability 100, space 1, times 1
-CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.2.0-rc2+ #2
-Hardware name: MSI MS-7A45/B150M MORTAR ARCTIC (MS-7A45), BIOS 1.50 04/25/2017
-Call Trace:
- <IRQ>
- dump_stack+0x63/0x85
- should_fail+0x14a/0x170
- nvme_should_fail+0x38/0x80 [nvme_core]
- nvme_irq+0x129/0x280 [nvme]
- ? blk_mq_end_request+0xb3/0x120
- __handle_irq_event_percpu+0x84/0x1a0
- handle_irq_event_percpu+0x32/0x80
- handle_irq_event+0x3b/0x60
- handle_edge_irq+0x7f/0x1a0
- handle_irq+0x20/0x30
- do_IRQ+0x4e/0xe0
- common_interrupt+0xf/0xf
- </IRQ>
-RIP: 0010:cpuidle_enter_state+0xc5/0x460
-Code: ff e8 8f 5f 86 ff 80 7d c7 00 74 17 9c 58 0f 1f 44 00 00 f6 c4 02 0f 85 69 03 00 00 31 ff e8 62 aa 8c ff fb 66 0f 1f 44 00 00 <45> 85 ed 0f 88 37 03 00 00 4c 8b 45 d0 4c 2b 45 b8 48 ba cf f7 53
-RSP: 0018:ffffffff88c03dd0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffffdc
-RAX: ffff9dac25a2ac80 RBX: ffffffff88d53760 RCX: 000000000000001f
-RDX: 0000000000000000 RSI: 000000002d958403 RDI: 0000000000000000
-RBP: ffffffff88c03e18 R08: fffffff75e35ffb7 R09: 00000a49a56c0b48
-R10: ffffffff88c03da0 R11: 0000000000001b0c R12: ffff9dac25a34d00
-R13: 0000000000000006 R14: 0000000000000006 R15: ffffffff88d53760
- cpuidle_enter+0x2e/0x40
- call_cpuidle+0x23/0x40
- do_idle+0x201/0x280
- cpu_startup_entry+0x1d/0x20
- rest_init+0xaa/0xb0
- arch_call_rest_init+0xe/0x1b
- start_kernel+0x51c/0x53b
- x86_64_start_reservations+0x24/0x26
- x86_64_start_kernel+0x74/0x77
- secondary_startup_64+0xa4/0xb0
-nvme nvme0: Could not set queue count (16385)
-nvme nvme0: IO queues not created