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* [KERNEL] make private network functions staticManuel Bentele2020-08-282-294/+286Star
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* [KERNEL] convert debug messages and clean up codeManuel Bentele2020-08-287-203/+254
| | | | | | | | | | | | This change converts all debug messages to support the Linux kernel's dynamic debug feature. Debug messages can be enabled or disabled by the debug feature if the - kernel module is built in debug mode (EXTRA_CFLAGS=-g -DDEBUG) - Linux kernel supports dynamic debug (CONFIG_DYNAMIC_DEBUG is set) This patch removes outdated kernel compatibility macros (used for Linux kernels in version 4.x) and cleans up the kernel module's code.
* [KERNEL] convert to blk-mq and ktimeManuel Bentele2020-08-274-144/+177
| | | | | | | | | | | This converts the dnbd3 kernel module driver to use the blk-mq infrastructure, which allows the dnbd3 kernel module driver to be compatible with Linux kernels in version 5.x or later. The conversion of the implementation uses one hardware queue to preserve the existing send/receive and load-balancing logic, but can be scaled up in the future. In addition to that, time measurements in the implementation are converted to ktime based accessors to replace the use of deprecated time interfaces.
* [KERNEL] Lower queue->limits.max_sectors to 256, like nbdSimon Rettberg2019-02-131-1/+1
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* [KERNEL] Fix keep alive timer on 4.15+Simon Rettberg2018-08-151-1/+1
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* [KERNEL] Add support for kernel 4.17.xSimon Rettberg2018-07-061-0/+11
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* [KERNEL] Pre/post 4.11 handling of request opsJonathan Bauer2018-04-052-11/+30
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* [KERNEL] #ifs and #defines for timer pre/post 4.15Simon Rettberg2018-04-052-13/+18
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* [KERNEL] Macros for packing CMD_* into struct requestSimon Rettberg2018-03-271-4/+21
| | | | Version check for pre or post 4.11
* Follow https://lwn.net/Articles/735887/Rafael Gieschke2018-03-242-4/+16
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* Include `linux/signal.h` for `siginitsetinv`, `sigmask`, `sigprocmask`Rafael Gieschke2018-03-241-0/+1
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* Follow ↵Rafael Gieschke2018-03-232-11/+11
| | | | https://github.com/torvalds/linux/commit/aebf526b53aea164508730427597d45f3e06b376
* [*] Introduce constants for IPv4/6 in dnbd3_host_tSimon Rettberg2017-10-282-16/+16
| | | | | | | AF_INET luckily was "2" on all platforms checked, so no problems there with interoperation, but AF_INET6 is different between Linux, BSD, Windows and possibly others, so map back and forth between AF_INET/AF_INET6 and HOST_IP4/HOST_IP6 to fix this.
* [KERNEL] version check to support pointer to backing_dev_info in request_queueSimon Rettberg2017-10-091-0/+6
| | | | | This changed in 4.11, see https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=dc3b17cc8bf21307c7e076e7c778d5db756f7871
* [*] Continue splitting #defines to clientconfig.h etc.Simon Rettberg2017-09-023-0/+3
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* [KERNEL] PAGE_CACHE_SIZE -> PAGE_SIZESimon Rettberg2016-10-171-1/+1
| | | | | | | These two have been the same all along and recently, the _CACHE variant has been removed (kernel 4.6). Switch to the non-CACHE version so build doesn't break on newer kernels.
* [KERNEL/CLIENT] Several minor tweaks and changesSimon Rettberg2016-01-113-13/+13
| | | | | | | | | | - Disable panic timeout that reports errors to block layer by default - Get rid of "is_server" used by old proxy mode, introduce "honor_server_alts" that just controls whether we use alts provided by the server - Allow switching servers when we only have 3 RTT measurements - If using alts provided by server, don't ignore those that come from other servers than the initial one
* [KERNEL] Add support for kernel 4.2.xSimon Rettberg2015-10-132-2/+12
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* Get rid of unneccessary volatileSimon Rettberg2015-02-221-2/+2
| | | | Some minor debugging code, mostly commented out
* [SERVER] Crank up warning levels of gcc and fix them all (mostly sign ↵Simon Rettberg2015-01-141-1/+4
| | | | | | | compare and some unused params) Also allow newline at end of alt-servers file without complaining about it not being a valid alt server definition.
* [KERNEL] Support for kernel 3.14Simon Rettberg2014-07-041-1/+6
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* [KERNEL] Improved read timeout handlingSimon Rettberg2013-12-201-4/+7
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* [KERNEL] Don't pick a random block for RTT measurementSimon Rettberg2013-11-171-17/+3Star
| | | | It's a bad idea.
* tiny fixSimon Rettberg2013-11-111-1/+1
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* [KERNEL] Fix possible deadlock on server switchSimon Rettberg2013-11-112-80/+75Star
| | | | | [KERNEL] Remove server mode support as it's not needed anymore [KERNEL] Some more sanity checks and debug messages
* [SERVER] Minor tweaks here and thereSimon Rettberg2013-11-101-12/+1Star
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* [KERNEL] Tweak better server selection a bit by also adding a constant delay ↵Simon Rettberg2013-10-241-1/+1
| | | | (1,5ms)
* [KERNEL] Slow down with RTT measurements after 30 secondsSimon Rettberg2013-10-242-6/+22
| | | | | | | Right after connecting, all servers will be polled every 4 seconds for 30 seconds, so we get 7 data points per alt-server. If no better server is found during this time, further RTT measurements will be done every 22 seconds, to put less load on the network in the long run.
* [KERNEL] Detect stale state and change serverSimon Rettberg2013-10-241-3/+24
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* [KERNEL] Check for invalid ioctls to prevent kernel panics :)Simon Rettberg2013-08-191-12/+21
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* [KERNEL] Throw a coin here and there when it comes to switching to a faster ↵Simon Rettberg2013-08-131-89/+94
| | | | server
* [SERVER] Uplink handing complete (untested, as alt servers can't be defined ↵Simon Rettberg2013-07-311-0/+1
| | | | yet, so prepare for lots of fixes ;))
* fix deadlocksr2013-07-182-8/+21
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* kernel module changessr2013-07-182-12/+28
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* Replace all pthread_spin_* calls with spin_*, so that all locking can be ↵sr2013-07-172-0/+2
| | | | | | tracked and debugged Fix compilation of kernel module
* [KERNEL/CLIENT] Add IPv6 supportdnbd3-sr-thesis-finalsr2013-01-151-27/+63
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* [SERVER] Remove unix socket support for RPC interfacesr2012-11-071-6/+7
| | | | [SERVER] Restructure RPC functions, add helpers
* [SERVER] Automatically connect a dnbd3 device for a relayed imagesr2012-09-092-24/+37
| | | | | | [SERVER] Automatically disconnect dnbd3 device if local cache copy is complete [SERVER] Pre-allocate disk space for cache file [KERNEL] Refuse connection if server reports disk size < 4096 bytes
* [SERVER] Automatically assign and connect a dnbd3 device to a relayed imagesr2012-09-062-8/+13
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* [SERVER] More work towards automatic server discovery and queryingsr2012-09-041-1/+1
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* [SERVER] Check which dnbd3 devices are idle and ready to use for proxy modesr2012-09-034-62/+56Star
| | | | | | [SERVER] Skeleton of server-to-server communication [SERVER] Update access-time of images in use by actual clients [*] Add dnbd3_host_t type to handle address+port+addrtype consistently across the project
* [*] Fixed and unified formattingsr2012-09-038-1034/+1040
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* [SERVER] Add list of trusted servers and namespaces (load, display)sr2012-09-021-5/+23
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* [KERNEL] Fix off-by-one errorsr2012-09-011-6/+9
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* fix complile errorsr2012-09-013-3/+4
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* [KERNEL] Tell server whether we're a client or a server in proxy modesr2012-09-014-8/+12
| | | | | [KERNEL] SysFS: Return empty string for current_server if not connected [SERVER] Code refactoring
* Fix linebreak, add commentsr2012-08-281-2/+7
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* [KERNEL] Add IOCTLs to add and remove serverssr2012-08-283-213/+190Star
| | | | | [KERNEL] Detect dead idle connection earlier [KERNEL] Improved debug output
* [SERVER] Add missing ntohl() calls when parsing replysr2012-08-271-0/+2
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* [KERNEL] Refactor and extend sysfs (add data the server will need in proxy mode)sr2012-08-274-142/+193
| | | | | | | [SERVER] Use MSG_MORE instead of cork/uncork to save two syscalls [KERNEL] Fail-Counter for alt servers, ignore servers that fail too often [KERNEL] Add new alt servers to list, instead of replacing the old list [*] Add CMD_LATEST_RID to tell client about new revisions
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