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[Qemu-devel] [PATCH v2 0/7] blkdebug
From: |
Kevin Wolf |
Subject: |
[Qemu-devel] [PATCH v2 0/7] blkdebug |
Date: |
Mon, 29 Mar 2010 16:52:41 +0200 |
This patch series introduces a new block driver which acts as a protocol and
whose purpose it is to fail requests. To be more precise, I want it to fail in
configurable places, so that qemu-iotests can be extended with tests for the
error paths (for example for the case when something with metadata writes goes
wrong deep in qcow2).
It works like this (I think this is self-explanatory):
$ cat /tmp/blkdebug.cfg
[inject-error]
event = "l1_update"
errno = "5"
immediately = "on"
$ qemu-io blkdebug:/tmp/blkdebug.cfg:/tmp/empty.qcow2
qemu-io> read 0 4k
read 4096/4096 bytes at offset 0
4 KiB, 1 ops; 0.0000 sec (195.312 MiB/sec and 50000.0000 ops/sec)
qemu-io> write 0 4k
write failed: Input/output error
Changes in comparison to the RFC:
- Had to rebase qemu-config changes
- Code cleanup (including resolving TODOs and FIXMEs)
- More events all over qcow2
- No debug messages on stderr any more
v2:
- Another rebase
- Fixed memleak in blkdebug_open
Kevin Wolf (7):
qemu-config: qemu_read_config_file() reads the normal config file
qemu-config: Make qemu_config_parse more generic
blkdebug: Basic request passthrough
blkdebug: Inject errors
Make qemu-config available for tools
blkdebug: Add events and rules
qcow2: Trigger blkdebug events
Makefile.objs | 6 +-
block.c | 12 ++
block.h | 53 ++++++
block/blkdebug.c | 475 ++++++++++++++++++++++++++++++++++++++++++++++++
block/qcow2-cluster.c | 15 ++
block/qcow2-refcount.c | 18 ++
block/qcow2.c | 6 +
block_int.h | 2 +
hw/qdev-properties.c | 19 ++-
hw/qdev.h | 1 -
qemu-config.c | 48 +++---
qemu-config.h | 4 +-
vl.c | 38 ++---
13 files changed, 644 insertions(+), 53 deletions(-)
create mode 100644 block/blkdebug.c
- [Qemu-devel] [PATCH v2 0/7] blkdebug,
Kevin Wolf <=
- [Qemu-devel] [PATCH v2 4/7] blkdebug: Inject errors, Kevin Wolf, 2010/03/29
- [Qemu-devel] [PATCH v2 1/7] qemu-config: qemu_read_config_file() reads the normal config file, Kevin Wolf, 2010/03/29
- [Qemu-devel] [PATCH v2 7/7] qcow2: Trigger blkdebug events, Kevin Wolf, 2010/03/29
- [Qemu-devel] [PATCH v2 6/7] blkdebug: Add events and rules, Kevin Wolf, 2010/03/29
- [Qemu-devel] [PATCH v2 3/7] blkdebug: Basic request passthrough, Kevin Wolf, 2010/03/29
- [Qemu-devel] [PATCH v2 5/7] Make qemu-config available for tools, Kevin Wolf, 2010/03/29
- [Qemu-devel] [PATCH v2 2/7] qemu-config: Make qemu_config_parse more generic, Kevin Wolf, 2010/03/29