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path: root/src/server/image.c
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* [SERVER] Export image idle time in json rpcSimon Rettberg2019-01-311-3/+6
| | | | Counter in seconds for how long this image hasn't been used.
* [SERVER] Use O_DIRECT for integrity checksSimon Rettberg2018-07-041-4/+12
| | | | | | | | | | | | | | The idea is that for full image checks, we don't want to pollute the fs cache with gigabytes of data that won't be needed again soon. This would certainly hurt performance on servers that dont have hundreds of GBs of RAM. For single block checks during replication this has the advantage that we don't check the block in memory before it hit the disk once, but actually flush the data to disk, then remove it from the page cache, and only then read it again, from disk. TODO: Might be worth making this a config option
* [SERVER] Refactor uplink/cache handling, improve crc checkingSimon Rettberg2018-07-041-216/+73Star
| | | | | | | | | | | | | The cacheFd is now moved to the uplink data structure and will only be handled by the uplink thread. The integrity checker now supports checking all blocks of an image. This will be triggered automatically whenever a check for a single block failed. Also, if a crc check on startup fails, the image won't be discarded anymore, but rather a full check will be initiated. Furthermore, when calling image_updateCacheMap() on an image that was previously complete, the cache map will now be re-initialized, and a new uplink connection created.
* [SERVER] Try to re-open cacheFd if writing failsSimon Rettberg2018-06-251-1/+44
| | | | | | | In scenarios where the proxy is using an NFS server as storage (for whatever crazy reason) or when the cacheFd goes bad through e.g. a switchroot, try to re-open it instead of just disabling caching forever.
* [SERVER] Make sure image has read fd before readingSimon Rettberg2018-06-131-29/+52
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* [SERVER] Don't spam log in vmdkLegacyMode for unknown imagesSimon Rettberg2018-05-021-3/+7
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* [SERVER] Fix deadlock on shutdown (via image_tryFreeAll)Simon Rettberg2018-04-241-4/+8
| | | | | imageListLock was locked on twice in the call stack, which is bad if you're using non-recursive locks.
* [SERVER] Mark spammy replication messages as DEBUG2 instead of 1Simon Rettberg2018-04-111-3/+3
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* [SERVER] Error handling and logging when saving cache mapSimon Rettberg2018-04-101-24/+37
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* [SERVER] Delete image files after releasing image to get rid of stale .map filesSimon Rettberg2018-03-191-7/+9
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* [SERVER] image.c: Add size to RPC data, rename bytesReceived, always add ↵Simon Rettberg2018-03-191-7/+11
| | | | uplink if existent
* [SERVER] Increase read() block size when calculating CRC32Simon Rettberg2018-03-191-1/+1
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* [SERVER] image_getCompletenessEstimate: Fix reversed logic in timeout checkSimon Rettberg2018-03-191-1/+3
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* [SERVER] Fix int overflows on 32bit builds in CRC generationSimon Rettberg2018-03-161-6/+6
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* [SERVER] Make sparse file mode actually workSimon Rettberg2018-03-161-5/+12
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* [SERVER] Experimental support for sparse files in proxy modeSimon Rettberg2018-03-151-10/+34
| | | | | | | | | | | | Will not preallocate images in this mode. Old images are only deleted if the disk is full, determined by write() calls to the cache file yielding ENOSPC or EDQUOT. In such a case, the least recently used image(s) will be deleted to free up at least 256MiB, and then the write() call will be repeated. This *should* work somewhat reliably unless the cache partition is ridiculously small. Performance might suffer a little, and disk fragmentation might occur much faster than in prealloc mode. Testing is needed.
* [SERVER] Add multiple config options for limiting stuffSimon Rettberg2017-11-081-2/+5
| | | | | maxClients, maxImages, maxPayload, maxReplicationSize Refs #3231
* [SERVER] altservers: Tweak, cleanup, refactor, renameSimon Rettberg2017-11-081-1/+1
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* [SERVER] Properly clamp to 4k borders in updateCachemap()Simon Rettberg2017-11-071-2/+9
| | | | Refs #3231
* [SERVER] Use multiConnect() to find uplink for replicationSimon Rettberg2017-11-071-12/+37
| | | | | Just as in the fuse client, this will speed things up if we have several alt-servers in our list which are not reachable.
* [SERVER] Support finer control over replication when a proxy connects to a proxySimon Rettberg2017-11-021-1/+1
| | | | | | | Introduce new flag in "select image" message to tell the uplink server whether we have background replication enabled or not. Also reject a connecting proxy if the connecting proxy uses BGR but we don't, as this would basically force the image to be replicated locally too.
* [*] Mark logadd() as printf-style function, fix errors that it revealedSimon Rettberg2017-10-311-1/+1
| | | | ...there were quite a few format string errors as it turns out :/
* [SERVER] Image list private to image.cSimon Rettberg2017-10-311-2/+2
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* [SERVER] Only start reloading images if no other reload is in progressSimon Rettberg2017-10-251-4/+12
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* [SERVER] Initialize PRNGSimon Rettberg2017-10-241-0/+1
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* [SERVER] Get rid of zlib dependencySimon Rettberg2017-10-241-16/+16
| | | | | | We only used it for CRC-32, so now the source tree includes a stripped down version of the crc32 code from the zlib project.
* [SERVER] Fix types or add explicit casts everywhere we might have type ↵Simon Rettberg2017-10-241-40/+45
| | | | conversion problems
* [SERVER] Use monotonic clock for measuring timeSimon Rettberg2017-10-191-19/+26
| | | | | Introduces new shared source unit timing.[ch] Closes #3214
* [SERVER] Don't try to load metadata files as images; fix clang-analyzer ↵Simon Rettberg2017-10-181-14/+35
| | | | false positives
* [*] Support hop-counting in request header, protocol version 3Simon Rettberg2017-10-171-3/+3
| | | | | | | | | | | | | | We steal 8 bits from the request offset to count hops when requests get relayed by proxies. This still leaves plenty of bits for the offset (56 bits, supporting images of up to 72 petabytes). This is used to detect proxy cycles. The algorithm is not perfect but should prevent endless relays of the same request. This is backwards compatible to old clients and servers, as the server only ever sets the hopcount in relayed requests if the upstream server is using protocol version 3 or newer, and clients are automatically upwards compatible as there is practically no image larger than 74PB, so the newly introduced hop count field is always 0 even in requests from old clients.
* [SERVER] rpc: Support querying storage size + available spaceSimon Rettberg2017-10-111-3/+3
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* [SERVER] Fix closing timeout reset, fix log messagesSimon Rettberg2017-09-081-1/+4
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* [SERVER] Refactor: Move client list to net.* and isolateSimon Rettberg2017-09-071-0/+1
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* [SERVER] Implement closeUnusedFd config optionSimon Rettberg2017-09-021-0/+26
| | | | | | | This will close the readFd of images that have no active clients after some idle period (1 hour currently). Prevents deleted images from taking up space until the server is shut down.
* [SERVER] Change handling of nonworking images, check for size changeSimon Rettberg2017-08-241-77/+169
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* [SERVER] Make crclist handling endian-safeSimon Rettberg2017-04-271-1/+8
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* [SERVER] Fix image_load aswell...Simon Rettberg2016-11-091-12/+12
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* [SERVER] Fix loading of rid-based images in vmdk legacy modeSimon Rettberg2016-11-091-9/+8Star
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* [SERVER] Fix formattingSimon Rettberg2016-03-221-3/+3
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* dnbd3server build success on freebsd :)Sebastian2016-02-111-12/+10Star
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* [SHARED] signal.h -> fdsignal.hSimon Rettberg2016-02-101-1/+1
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* [SERVER] BREAKING: Get rid of pseudo case-insensitivityv2.1Simon Rettberg2016-02-011-17/+13Star
| | | | | | | | | | This was a wrong decision made long time ago, and it's broken in certain scenarios (eg. two servers serving from same NFS mount). Also it's of limited use anyways since it only supportes ASCII and would ignore umlauts, so blöd and BLÖD would still be considered two different images. So if you relied on this "feature" in any way, be careful when updating.
* [SERVER] Fix a lot of (mostly harmless) data racesSimon Rettberg2016-01-111-33/+46
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* [SERVER] Performance: Optimized some functions (gprof)Simon Rettberg2015-12-171-7/+18
| | | | | | | A run with gprof revealed that background replication is a huge CPU hog. The block selection was very slow and has been improved a lot. Minor improvements were made to other functions that scan the cache map of an image and are thus relatively slow.
* [SERVER] image_markComplete now handles locking so we remove() unlockedSimon Rettberg2015-12-171-7/+12
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* [SERVER] Cancel scanning of image dir if _shutdown is setSimon Rettberg2015-12-161-2/+4
| | | | So you can cancel image loading on startup via Ctrl-C
* [SERVER] Fix image_calcBlockCrc32: Use 64bit for fileSize paramSimon Rettberg2015-12-161-22/+27
| | | | Using uint32_t for fileSize is not too clever :(
* [SERVER] More fine grained locking for RPC; better error loggingSimon Rettberg2015-12-161-13/+34
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* [SERVER] Update config exampleSimon Rettberg2015-12-151-2/+6
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* [SERVER] Remove non-working images from list, plus refactoringSimon Rettberg2015-12-151-51/+175
| | | | | | | | | | Now that we can automatically load unknown images from disk on request, it makes sense to remove non-working images from the image list. On future requests, we will look for them on disk again, which is nice in case of temporary storage hickups. Also, some more ore less related locking has been refined (loading images, replicating images)
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