dnbd3.git - Distributed Network Block Device 3 --rewrite for Kernel 3.x

	Commit message (Collapse)	Author	Age	Files	Lines
*	[KERNEL] Add support for Linux kernels without blk-mq (e.g. CentOS 7)	Manuel Bentele	2021-06-16	1	-1/+22
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*	[KERNEL] Removes duplicate word 'of' in license headers	Manuel Bentele	2021-04-16	1	-1/+1
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*	[KERNEL] Implement best_count logic for load balancing	Simon Rettberg	2021-03-26	1	-1/+3
\| \| \| \| \| \| \|	Similar logic already exists in the fuse client: Count how many times in a row a server was fastest when measuring RTTs, and lower the switching threshold more the higher the count gets.
*	[KERNEL] Use sockaddr instead of dnbd3_host_t where possible	Simon Rettberg	2021-03-24	1	-9/+16
\| \| \| \| \| \| \| \|	Convert dnbd3_host_t to struct sockaddr immediately when adding alt servers, so we don't have to convert it every time we establish a connection. Additionally we can now use %pISpc in printf-like functions instead of having if/else constructs whenever we want to print an address.
*	[KERNEL] Synchronous add/remove of alt-servers via IOCTL	Simon Rettberg	2021-03-23	1	-5/+9
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*	[KERNEL] Refactor code to satisfy Linux kernel code style	Manuel Bentele	2021-03-12	1	-12/+12
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*	[KERNEL] Fix several connect/disconnect race conditions	Simon Rettberg	2020-11-19	1	-1/+2
\| \| \| \| \| \| \| \| \| \| \| \| \| \| \| \| \| \| \|	Previously disconnect was protected against concurrent calls, but connect wasn't. It was easy to crash the kernel when calling connect and disconnect IOCTLs in a tight loop concurrently. A global lock was introduced to make sure only one caller can change the connection state at a time. dev->connection_lock needs to be aquired when calling dnbd3_net_connect or _disconnect. This atomic_t based locking mechanism should be turned into a mutex in a next step, relying on mutex_trylock for cases where we don't have the cmpxchg-schedule() loop. Along the way it was noticed that the send/receive timeouts don't apply to kernel_connect, which might have been the case in older 3.x kernel versions. A crude workaround using nonblocking connect has been introduced to emulate this, but a clean solution for this is welcomed. Also, devices are now properly closed on module unload.
*	[KERNEL] add manual switching of dnbd3-server to specified server	Manuel Bentele	2020-11-10	1	-0/+3
\| \| \| \| \| \|	This patch adds the feature to manually switch the dnbd3-server to a specified server. The switching is implemented by the use of the ioctl call SWITCH.
*	[KERNEL]: change probing logic to select first available server	Manuel Bentele	2020-11-09	1	-1/+1
\| \| \| \| \| \| \|	This patch changes the probing logic to select the first available dnbd3-server submitted by the ioctl OPEN call. All other specified dnbd3-servers are added to the alternative server list and do not have to be available.
*	[KERNEL, CLIENT]: submit and probe multiple dnbd3-server with ioctl OPEN	Manuel Bentele	2020-11-06	1	-1/+0
\| \| \| \| \| \| \| \| \| \|	The ioctl OPEN call for DNBD3 devices exposed by the dnbd3 Linux kernel module, is extended with a fixed array of dnbd3 hosts. The fixed array allows the dnbd3-client to submit host information (IP address and port) of multiple dnbd3-servers. This information is used to probe all submitted dnbd3-servers and add them to the alternative dnbd3-server list. If at least one dnbd3-server is not reachable, the OPEN ioctl call will abort with an error code.
*	[BUILD] rewrite CMake build system to track changes of source files	Manuel Bentele	2020-10-16	1	-0/+88
	This change restructures the source code directories, separates shared form non-shared application code and adds CMake dependencies. These dependencies allow the tracking of changes and trigger a rebuild of those build targets where changed files are involved. WARNING: Note that the support of the DNBD3_SERVER_AFL build option is not supported yet. Thus, the option should be never turned on.