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authorAlexander Aring <aahringo@redhat.com>2021-11-02 22:17:20 +0300
committerDavid Teigland <teigland@redhat.com>2021-11-02 22:39:20 +0300
commit9af5b8f0ead7cd90161b0555ed8e85ee38f79fa5 (patch)
treeea127bf5ce24641ae0cf177234319fcf25d14461 /fs/dlm/midcomms.h
parent5c16febbc19bb463bfb8e80cb5b24ec6ff1a439f (diff)
downloadlinux-9af5b8f0ead7cd90161b0555ed8e85ee38f79fa5.tar.xz
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.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/dlm/midcomms.h b/fs/dlm/midcomms.h
index 579abc6929be..bc63cf73aa87 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__ */