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| author | Alexander Aring <aahringo@redhat.com> | 2021-11-02 15:17:20 -0400 |
|---|---|---|
| committer | David Teigland <teigland@redhat.com> | 2021-11-02 14:39:20 -0500 |
| commit | 9af5b8f0ead7cd90161b0555ed8e85ee38f79fa5 (patch) | |
| tree | ea127bf5ce24641ae0cf177234319fcf25d14461 /fs/dlm/midcomms.h | |
| parent | 5c16febbc19bb463bfb8e80cb5b24ec6ff1a439f (diff) | |
| download | linux-9af5b8f0ead7cd90161b0555ed8e85ee38f79fa5.tar.gz | |
fs: dlm: add debugfs rawmsg send functionality
This patch adds a dlm functionality to send a raw dlm message to a
specific cluster node. This raw message can be build by user space and
send out by writing the message to "rawmsg" dlm debugfs file.
There is a in progress scapy dlm module which provides a easy build of
DLM messages in user space. For example:
DLM(h_cmd=3, o_nextcmd=1, h_nodeid=1, h_lockspace=0xe4f48a18, ...)
The goal is to provide an easy reproducable state to crash DLM or to
fuzz the DLM kernel stack if there are possible ways to crash it.
Note: that if the sequence number is zero and dlm version is not set to
3.1 the kernel will automatic will set a right sequence number, otherwise
DLM stack testing is not possible.
Signed-off-by: Alexander Aring <aahringo@redhat.com>
Signed-off-by: David Teigland <teigland@redhat.com>
Diffstat (limited to 'fs/dlm/midcomms.h')
| -rw-r--r-- | fs/dlm/midcomms.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/dlm/midcomms.h b/fs/dlm/midcomms.h index 579abc6929be2..bc63cf73aa872 100644 --- a/fs/dlm/midcomms.h +++ b/fs/dlm/midcomms.h @@ -28,6 +28,8 @@ const char *dlm_midcomms_state(struct midcomms_node *node); unsigned long dlm_midcomms_flags(struct midcomms_node *node); int dlm_midcomms_send_queue_cnt(struct midcomms_node *node); uint32_t dlm_midcomms_version(struct midcomms_node *node); +int dlm_midcomms_rawmsg_send(struct midcomms_node *node, void *buf, + int buflen); #endif /* __MIDCOMMS_DOT_H__ */ |