Commit Graph

396 Commits

Author SHA1 Message Date
Wolfgang Bumiller 5c1130df9f implement Sync for DynamicIndexReader and FixedIndexReader
hyper's wrap_stream now needs this

Signed-off-by: Wolfgang Bumiller <w.bumiller@proxmox.com>
2019-09-02 15:17:58 +02:00
Wolfgang Bumiller d21f8a5b5b backup/dynamic_index: explicitly zero-initialize the header
The writer.write_all() call accessed data marked as
undefined to valgrind. Note that we shouldn't write out
uninitialized memory for security reasons anyway.
(note that vec::undefined already did zero-initialize the
data, but also marked it as undefined for valgrind when
compiling with the valgrind feature)

Signed-off-by: Wolfgang Bumiller <w.bumiller@proxmox.com>
2019-08-23 11:42:35 +02:00
Wolfgang Bumiller 990b930f22 backup/dynamic_index: use static assertion, fix size
The type was sized properly but the number was still wrong,
fixed this.
TODO! Once unions with non-Copy values are stable make this
a `union { full: [u8; 4096], data: TheActualHeader }`;

Signed-off-by: Wolfgang Bumiller <w.bumiller@proxmox.com>
2019-08-23 11:42:35 +02:00
Wolfgang Bumiller 7d83440c60 remove proxmox-protocol subcrate
AFAICT we have no use for it anymore, its api entry points
are gone. If we do end up needing something from it, it's
still in the git history anyway. (And about two thirds of it
can be made much less awkward by utilizing async-await
anyway, so no love lost there...)

Moved the chunker back into src/backup/chunker.rs

Signed-off-by: Wolfgang Bumiller <w.bumiller@proxmox.com>
2019-08-22 14:08:25 +02:00
Wolfgang Bumiller 5e58e1bb7d {dynamic,fixed}_index: replace mem::uninitialized
Signed-off-by: Wolfgang Bumiller <w.bumiller@proxmox.com>
2019-08-22 11:35:36 +02:00
Wolfgang Bumiller f93b55b057 src/backup/index: style fixup & unsafe copy removal
We can use the safe .copy_from_slice alternative in this
case.

Signed-off-by: Wolfgang Bumiller <w.bumiller@proxmox.com>
2019-08-22 11:31:45 +02:00
Wolfgang Bumiller fa17b1ce2a src/backup/index: replace mem::uninitialized
Signed-off-by: Wolfgang Bumiller <w.bumiller@proxmox.com>
2019-08-22 11:27:35 +02:00
Wolfgang Bumiller 367f002ee2 use statement cleanup
Signed-off-by: Wolfgang Bumiller <w.bumiller@proxmox.com>
2019-08-16 12:28:40 +02:00
Dietmar Maurer 9d135fe617 src/backup/catalog_blob.rs: moved catalog impl. from pxar
And avoid loading catalog into memory.
2019-08-16 12:27:17 +02:00
Wolfgang Bumiller 9025312aa6 avoid lifetimes in blob reader/writer 2019-08-16 10:07:24 +02:00
Dietmar Maurer 71d08e00b7 src/backup/data_blob_reader.rs: fix compiler warning 2019-08-16 08:10:39 +02:00
Dietmar Maurer b791804f4b src/backup/data_blob_reader.rs: impl for Read instead of BufRead 2019-08-14 14:56:01 +02:00
Dietmar Maurer 39a4df61d6 improve docs 2019-08-14 14:08:27 +02:00
Dietmar Maurer 018d11bb84 src/backup/data_blob.rs: move parts into single files 2019-08-14 13:24:41 +02:00
Dietmar Maurer e27c5a559f src/backup/data_blob.rs: avoid excessive stack usage 2019-08-14 12:44:08 +02:00
Dietmar Maurer c638542b4b src/backup/file_formats.rs: moved header_size 2019-08-14 12:35:53 +02:00
Dietmar Maurer 6082216343 src/backup/data_blob.rs - CryptReader/CryptWriter: fix buffer size handling 2019-08-13 15:23:15 +02:00
Dietmar Maurer 548c9489d7 src/backup/data_blob.rs - DataBlobReader: impl compressed, encrypted blobs 2019-08-13 13:17:08 +02:00
Dietmar Maurer 2aa0bfff59 src/backup/data_blob.rs - DataBlobReader: implement reader for encrtypted blobs 2019-08-13 13:17:08 +02:00
Dietmar Maurer e9a385a78e src/backup/data_blob.rs - DataBlobReader: impl compressed, signed blobs 2019-08-12 17:47:25 +02:00
Dietmar Maurer 4bfa147eaf src/backup/data_blob.rs - DataBlobReader: impl. reader for signed blobs 2019-08-12 17:41:25 +02:00
Dietmar Maurer 09785b2795 src/backup/data_blob.rs - DataBlobReader: start serious impl. 2019-08-12 17:20:41 +02:00
Dietmar Maurer a32bd8a516 src/backup/data_blob.rs - DataBlobWriter: fix decryption 2019-08-12 11:57:29 +02:00
Dietmar Maurer 5d15cb49b4 src/backup/data_blob.rs - compute_crc: start after blob header 2019-08-12 11:32:26 +02:00
Dietmar Maurer 1cbdfd19a2 src/backup/file_formats.rs; use const instzead of static 2019-08-12 11:20:21 +02:00
Dietmar Maurer 18be4ec24a src/backup/data_blob.rs - DataBlobWriter: fix magic number for uncompressed blobs 2019-08-12 10:46:05 +02:00
Dietmar Maurer 5622a3fcdb src/backup/data_blob.rs - DataBlobWriter: impl. compressed encrypted blobs 2019-08-12 10:16:42 +02:00
Dietmar Maurer f4942e9ffd src/backup/data_blob.rs - DataBlobWriter: impl. encrypted blobs 2019-08-12 10:08:00 +02:00
Dietmar Maurer c57ec43a53 src/backup/crypt_config.rs: new helper data_crypter to get openssl Crypter 2019-08-12 10:06:51 +02:00
Dietmar Maurer 7776becf5d src/backup/data_blob.rs - DataBlobWriter: impl. compressed signed blobs 2019-08-12 09:01:08 +02:00
Dietmar Maurer 706638f803 src/backup/data_blob.rs: impl. ChecksumWriter
To correctly compute crc,hmac of final data.
2019-08-12 08:53:53 +02:00
Dietmar Maurer f796351c54 src/backup/data_blob.rs: impl. DataBlobWriter for authenticated blobs 2019-08-12 07:34:41 +02:00
Dietmar Maurer cb0eea29d9 src/backup/crypt_config.rs: new method to get hmac signer 2019-08-12 07:33:15 +02:00
Dietmar Maurer a762ce54fd src/backup/data_blob.rs: make DataBlobWriter more generic
Allow to write compressed and uncompressed blobs.
2019-08-11 12:14:04 +02:00
Dietmar Maurer 1f26fdef19 src/backup/data_blob.rs: impl. simple reader/writer
To avoid loading blob into memory.
2019-08-11 11:32:36 +02:00
Dietmar Maurer 781ac11c6a src/backup/data_blob.rs: define const MAX_BLOB_SIZE 2019-08-09 11:49:06 +02:00
Dietmar Maurer 863be2e6e2 src/backup/data_blob.rs: allow largert blob sizes (128MB)
Need this for catalog files.
2019-08-09 10:22:56 +02:00
Dietmar Maurer eecb23560b src/backup/data_blob.rs - encode: always compute crc 2019-08-07 08:30:27 +02:00
Dietmar Maurer 38a6cddad7 src/backup/backup_info.rs: add BackupInfo::new constructor 2019-08-07 08:27:52 +02:00
Dietmar Maurer f889b15867 src/backup/data_blob.rs: always compute crc 2019-08-06 11:42:14 +02:00
Dietmar Maurer e18a6c9ee5 update to nix 0.14, use code from proxmox:tools 2019-08-03 13:05:38 +02:00
Dietmar Maurer 69ecd8d5b0 src/backup/data_blob.rs: implement signed blobs 2019-08-02 09:56:01 +02:00
Dietmar Maurer 93205f942a src/backup/crypt_config.rs: new compute_auth_tag helper 2019-08-02 08:55:37 +02:00
Dietmar Maurer c68d2170d5 src/backup/crypt_config.rs: fix typo 2019-08-02 08:29:40 +02:00
Dietmar Maurer fa5d6977dd Revert previous, commit, use UTC RFC3339 without timezone (Z)
We now have human readable data/time, and names are still sortable.
2019-07-22 11:49:30 +02:00
Dietmar Maurer 10c2a21cfe src/backup/backup_info.rs: use unix epoch timestamps instead of RFC3339
RFC3339 contains additional timezone information, but IMHO this just adds
more confusion. The API also uses timestamps.
2019-07-22 07:57:03 +02:00
Dietmar Maurer f4bf7dfcc7 src/client/remote_chunk_reader.rs: implement simple caching 2019-07-05 10:42:46 +02:00
Dietmar Maurer afb4cd28be src/backup/fixed_index.rs: implement BufferedFixedReader 2019-07-05 09:19:56 +02:00
Dietmar Maurer b46c3fad03 src/backup/fixed_index.rs: use correct size
We need to consider that the last chunk may have smaller size.
2019-07-04 15:13:22 +02:00
Dietmar Maurer 5e04ec707d src/api2/backup/environment.rs: improve chunk alignment/size checks 2019-07-04 13:40:43 +02:00
Dietmar Maurer a24e3993e0 src/backup/chunk_store.rs: coding style fixes 2019-07-04 11:39:10 +02:00
Dietmar Maurer e4c2fbf170 src/backup/chunk_store.rs: additionally log chunk count 2019-07-04 11:27:11 +02:00
Dietmar Maurer 9850bcdf19 src/backup/chunk_store.rs: improve error reporting 2019-07-04 11:21:54 +02:00
Wolfgang Bumiller a3f3e91da2 backup/chunk_store: rework chunk iterator
We can now use iter::from_fn() which makes for a much nicer
logic. The only thing better is going to be when we can use
generators with `yield`.

Signed-off-by: Wolfgang Bumiller <w.bumiller@proxmox.com>
2019-07-04 10:55:17 +02:00
Dietmar Maurer a57360983b src/backup/chunk_store.rs - get_chunk_iterator: return percentage inside iterator item 2019-07-04 09:26:44 +02:00
Dietmar Maurer 0f0a35b390 src/backup/dynamic_index.rs: lock file inside new, code cleanup 2019-07-04 08:17:30 +02:00
Dietmar Maurer a7c72ad9eb src/backup/fixed_index.rs - FixedIndexReader: remove reference to chunk store 2019-07-04 08:13:16 +02:00
Dietmar Maurer a660978c9a src/backup/datastore.rs: generic index_mark_used_chunks implementation, improve GC stats 2019-07-04 07:57:43 +02:00
Dietmar Maurer 1e0784841c src/backup/read_chunk.rs: use &mut self 2019-07-03 14:25:18 +02:00
Dietmar Maurer 877dd11133 src/backup/{fixed, dynamic}_index.rs: improve error messages 2019-07-02 08:56:56 +02:00
Dietmar Maurer 5c593a4d56 src/backup/read_chunk.rs: use Arc for DataStore 2019-07-02 08:49:16 +02:00
Dietmar Maurer b850673634 src/backup/read_chunk.rs: move read chunk trait into extra file
And implement LocalChunkReader.
2019-07-02 08:22:29 +02:00
Wolfgang Bumiller f35197f449 replace tools::vec with proxmox::tools::vec
Signed-off-by: Wolfgang Bumiller <w.bumiller@proxmox.com>
2019-07-01 11:03:25 +02:00
Wolfgang Bumiller 9b2b627fe0 update remaining users of tools::io::ops
Signed-off-by: Wolfgang Bumiller <w.bumiller@proxmox.com>
2019-07-01 10:44:03 +02:00
Wolfgang Bumiller 5485b579a1 backup: use new proxmox::tools::io traits
This replaces all `write_value` calls with `write_le_value`
calls!

Signed-off-by: Wolfgang Bumiller <w.bumiller@proxmox.com>
2019-07-01 10:37:02 +02:00
Dietmar Maurer d48a9955a5 src/backup/dynamic_index.rs: introduce ReadChunk trait 2019-06-28 16:35:00 +02:00
Dietmar Maurer 81a6ce6fde src/backup/chunk_store.rs: new method chunk_path()
Returns the absolute path.
2019-06-28 15:48:09 +02:00
Dietmar Maurer b208da8393 src/backup/data_{chunk,blob}.rs: add verify_crc method 2019-06-26 09:54:25 +02:00
Dietmar Maurer bb8231409e src/backup/crypt_config.rs - generate_rsa_encoded_key: store as json
Use the KeyConfig serialization with kdf = None.
2019-06-26 07:32:34 +02:00
Dietmar Maurer c6d203bbd3 src/backup/backup_info.rs: also list .blob files 2019-06-25 07:07:45 +02:00
Dietmar Maurer 9f46c7de4b src/bin/proxmox-backup-client.rs: upload rsa encoded key after backup 2019-06-24 13:56:37 +02:00
Dietmar Maurer cb08ac3efe src/api2/backup.rs: replace upload_config with upload_blob 2019-06-23 11:44:30 +02:00
Dietmar Maurer a38c5d4d12 src/backup/data_blob.rs: implement from_raw() 2019-06-23 09:35:44 +02:00
Dietmar Maurer 6f083b7a92 src/api2/backup/upload_chunk.rs: compute crc on upload 2019-06-23 09:04:42 +02:00
Dietmar Maurer ba01828d38 try to use use proxmox::tools::io::ops::ReadExtOps 2019-06-22 16:29:10 +02:00
Dietmar Maurer 27042ce637 src/backup/file_formats.rs: improve docs 2019-06-22 15:45:36 +02:00
Dietmar Maurer 9f83e0f7ee src/backup/crypt_config.rs: simplify decode interface 2019-06-22 13:24:29 +02:00
Dietmar Maurer 0066c6d972 src/backup/crypt_config.rs: remove encode_chunk, use encrypt_to instead 2019-06-22 13:02:53 +02:00
Dietmar Maurer ee8a7e8080 src/backup/crypt_config.rs: implement encrypt_to (output to writer) 2019-06-22 12:25:04 +02:00
Dietmar Maurer 991abfa8b4 src/backup/file_formats.rs: split out file format data 2019-06-22 09:12:25 +02:00
Dietmar Maurer b7f4f27d6c add crc field for binary blobs formats 2019-06-21 18:49:04 +02:00
Dietmar Maurer 3025b3a53c src/backup/data_blob.rs: new file format for binary blobs 2019-06-21 11:32:07 +02:00
Dietmar Maurer 077a8cae63 src/backup/crypt_config.rs: make code more flexible
Allow to pass magic numbers as parameters.
2019-06-21 10:50:48 +02:00
Dietmar Maurer c38266c18d renamed: src/backup/crypt_setup.rs -> src/backup/crypt_config.rs 2019-06-21 09:51:18 +02:00
Dietmar Maurer ab44acff57 src/backup/key_derivation.rs: add modified field to key file 2019-06-20 07:58:33 +02:00
Dietmar Maurer 6d0983dbe1 src/bin/proxmox-backup-client.rs: add keyfile parameter for backup 2019-06-19 17:16:41 +02:00
Dietmar Maurer 181f097af9 src/bin/proxmox-backup-client.rs - key API: pass kdf parameter
Allow to store keys without password.
2019-06-18 18:21:01 +02:00
Dietmar Maurer 826f309bf5 src/backup/key_derivation.rs: move kdf code into separate file 2019-06-18 11:17:22 +02:00
Dietmar Maurer 11515438cc Cargo.toml: use serde feature derive 2019-06-18 06:23:25 +02:00
Dietmar Maurer f2401311b0 src/bin/proxmox-backup-client.rs: start key management 2019-06-17 10:33:24 +02:00
Dietmar Maurer a7dd483097 src/backup/*_index.rs: used generated magic numbers 2019-06-14 14:58:37 +02:00
Dietmar Maurer bffd40d6b7 src/tools.rs: move hex_to_digest and digest_to_hex to proxmox::tools 2019-06-14 11:40:04 +02:00
Dietmar Maurer 9335d74eba src/backup/fixed_index.rs: compute checksum over the index 2019-06-14 10:34:29 +02:00
Dietmar Maurer 16ff6b7cd8 src/backup/dynamic_index.rs: compute checksum over the index 2019-06-14 10:33:59 +02:00
Dietmar Maurer fa148dbd11 src/api2/backup/upload_chunk.rs: verify chunk data if possible 2019-06-14 06:23:46 +02:00
Dietmar Maurer f640f23ac5 src/backup/data_chunk.rs: fix typo 2019-06-13 16:42:55 +02:00
Dietmar Maurer dba72d5016 src/backup/data_chunk.rs: only use compressed data if it is shorter than uncompressed 2019-06-13 12:56:50 +02:00
Dietmar Maurer 68ab376ae9 src/backup/crypt_setup.rs: only use compressed data if it is shorter than uncompressed 2019-06-13 12:47:54 +02:00
Dietmar Maurer f98ac774ee backup: Add support for client side encryption
first try ...
2019-06-13 11:47:23 +02:00
Dietmar Maurer 51929e4532 src/backup/data_chunk.rs - decode: make crypt_config optional 2019-06-13 11:44:38 +02:00
Dietmar Maurer 046bcb9773 src/backup/crypt_setup.rs: add comment for possible improvements 2019-06-13 07:35:59 +02:00
Dietmar Maurer bd0e3c7cfa src/backup/data_chunk.rs: Moved ChunkInfo from merge_known_chunks.rs 2019-06-13 07:35:02 +02:00
Dietmar Maurer b595cb9d2c src/backup/data_chunk.rs: Data Chunk builder
Make handling encoded chunks easier.
2019-06-12 13:37:01 +02:00
Dietmar Maurer ef27200cec src/backup/crypt_setup.rs: fix encoder for uncompressed chunks 2019-06-10 09:56:06 +02:00
Dietmar Maurer 74792b95b2 src/backup/crypt_setup.rs: allow compressed and uncompressed chunks 2019-06-10 08:27:35 +02:00
Dietmar Maurer 9e0187a203 src/backup/crypt_setup.rs: remove unused CryptData struct 2019-06-10 07:55:36 +02:00
Dietmar Maurer bec8498ae3 src/backup/crypt_setup.rs: avoid useless allocations 2019-06-09 11:44:17 +02:00
Dietmar Maurer 48b4b40b57 src/backup/crypt_setup.rs: crypto helpers 2019-06-08 09:56:51 +02:00
Wolfgang Bumiller dd5495d6dc tree-wide: use 'dyn' for all trait objects
Signed-off-by: Wolfgang Bumiller <w.bumiller@proxmox.com>
2019-06-07 13:13:48 +02:00
Dietmar Maurer 36898ffce6 src/backup/chunk_stream.rs: add optional chunk_size parameter 2019-05-30 13:28:24 +02:00
Dietmar Maurer 976595e1a9 src/backup/dynamic_index.rs: split class DynamicIndexWriter 2019-05-29 08:49:57 +02:00
Dietmar Maurer cb0708dd46 src/backup/fixed_index.rs: remove ChunkStat from struct 2019-05-29 07:08:34 +02:00
Dietmar Maurer 01af11f340 src/backup/fixed_index.rs: improve consistency checks 2019-05-29 07:02:45 +02:00
Dietmar Maurer 006f3ff407 src/api2/admin/datastore/backup/environment.rs: add more consistency checks 2019-05-28 09:21:31 +02:00
Dietmar Maurer fc14b84937 src/backup/fixed_index.rs: improve bound checks inside add_digest 2019-05-28 08:47:03 +02:00
Dietmar Maurer e1225de467 src/backup/fixed_index.rs: store index_length to avoid code duplication 2019-05-28 08:27:57 +02:00
Dietmar Maurer 29ae5c86a2 src/backup/fixed_index.rs: make chunk_size public 2019-05-28 06:18:24 +02:00
Wolfgang Bumiller 8ea3b1d188 tree-wide: use the new vec/io tools modules
Signed-off-by: Wolfgang Bumiller <w.bumiller@proxmox.com>
2019-05-23 09:49:10 +02:00
Dietmar Maurer 0cc0fffd1e src/backup/chunk_stream.rs: use BytesMut in ChunkStream 2019-05-22 09:39:02 +02:00
Dietmar Maurer c052be5c86 src/backup/chunk_stream.rs: use more generics 2019-05-22 09:18:05 +02:00
Dietmar Maurer 169c0e060f src/backup/chunk_stream.rs: optimize FixedChunkStream (use BytesMut) 2019-05-22 09:05:35 +02:00
Dietmar Maurer 3be3f3dcc4 src/backup/chunk_stream.rs: fix behaviour for large input buffers 2019-05-22 08:05:27 +02:00
Dietmar Maurer 02fa54ff3c src/backup/chunk_stream.rs: assemble data with correct order 2019-05-22 07:44:51 +02:00
Dietmar Maurer 7f3d2ffab9 src/backup/index.rs: rename ChunkListReader into DigestListEncoder 2019-05-21 12:28:44 +02:00
Dietmar Maurer ee53955f52 src/backup/index.rs: implement DigestListDecoder 2019-05-21 12:21:22 +02:00
Dietmar Maurer 40f4e198a8 src/backup/dynamic_index.rs: add chunk_info method 2019-05-21 09:52:19 +02:00
Dietmar Maurer ff77dbbea3 Revert "src/backup/chunk_stream.rs: simplify code"
This reverts commit e058744d8f.
The optimization was wrong, and produces wrong chunk boundaries.
2019-05-19 11:05:56 +02:00
Dietmar Maurer e058744d8f src/backup/chunk_stream.rs: simplify code 2019-05-18 10:55:46 +02:00
Dietmar Maurer 8a7cc7565f src/backup/chunk_stream.rs: implement fixed size chunk stream 2019-05-18 10:55:46 +02:00
Dietmar Maurer dafc27aeff src/backup/chunk_stream.rs: async chunk stream 2019-05-14 10:05:29 +02:00
Dietmar Maurer 457531e7fe src/backup/index.rs: new ChunkListReader 2019-05-11 16:01:42 +02:00
Dietmar Maurer 51a4f63ff7 src/backup/datastore.rs: move last_backup to BackupInfo 2019-05-11 12:07:09 +02:00
Dietmar Maurer b02a52e3a5 src/backup/datastore.rs: impl last_backup helper 2019-05-11 11:36:46 +02:00
Dietmar Maurer c09775011a src/backup/backup_info.rs: implement list_backup for BackupGroup, cleanups 2019-05-11 10:19:34 +02:00
Dietmar Maurer 35a2d8a6a6 src/backup/backup_info.rs: Derive Clone 2019-05-10 06:59:23 +02:00
Dietmar Maurer f2b99c34f7 src/api2/admin/datastore.rs: implement API to return last GC status 2019-04-11 12:04:25 +02:00
Dietmar Maurer d4b59ae0b8 src/backup/datastore.rs: pass WorkerTask to GC
So that we can log to the task log file.
2019-04-06 17:57:38 +02:00
Dietmar Maurer 92da93b245 abort GC on server shutdown 2019-04-01 12:13:02 +02:00
Dietmar Maurer 11861a482d src/backup/chunk_store.rs: fix GC
Added option to get oldest_writer timestamp from ProcessLocker.
2019-03-31 17:21:36 +02:00
Dietmar Maurer d85987aeeb fix last commit: the filename var was not ment to be removed, sorry 2019-03-31 16:16:14 +02:00
Dietmar Maurer 15a77c4c2e src/backup/chunk_store.rs: avoid create/unlink race 2019-03-31 10:03:01 +02:00
Dietmar Maurer 10eea49d81 src/backup/fixed_index.rs: store reference to file
Keep it open and locked while index is in use.
2019-03-27 10:17:03 +01:00
Dietmar Maurer c597a92c81 index file readers: aquire shared lock 2019-03-27 10:11:14 +01:00
Dietmar Maurer 43b1303398 datastore: use new ProcessLocker
To make sure only one process runs garbage collection while having active writers.
2019-03-22 09:42:15 +01:00
Dietmar Maurer 515688d1f1 avoid compiler warnings 2019-03-18 10:00:58 +01:00
Dietmar Maurer 8968258b66 rename catar into pxar
To avoid confusion with the casync implementation.
2019-03-14 10:54:09 +01:00
Dietmar Maurer 8e39232acc src/bin/proxmox-backup-client.rs: strip .didx file extensions 2019-03-11 10:54:02 +01:00
Wolfgang Bumiller 06178f13fa move chunker into proxmox_protocol
Signed-off-by: Wolfgang Bumiller <w.bumiller@proxmox.com>
2019-03-08 09:29:47 +01:00
Dietmar Maurer 141f062e08 src/backup/chunk_store.rs: use zstd compression insteadf of lz4
Provides better compressionm rate, and is still fast.
2019-03-07 11:42:59 +01:00
Dietmar Maurer d2690f74bb src/backup/chunk_store.rs: read_chunk - clear buffer before calling read_to_end 2019-03-07 10:40:01 +01:00