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AgeCommit message (Expand)Author
2021-11-25daemon: Read substitute nar size as 'unsigned long long'....Fixes <https://issues.guix.gnu.org/46212>. Reported by Christopher Baines <mail@cbaines.net>. Previously, the nar size returned by 'guix substitute' would be read as an 'int'; thus, values above 2^31 - 1 would be read and then stored as negative integers in the database. Regression introduced in 9dfa20a22ae0be3d3b01a7b3d422af97428c627e. * nix/libstore/build.cc (SubstitutionGoal::finished): Use templatized 'string2Int' instead of 'std::atoi' to get an 'unsigned long long', which is the type of 'hash.second'. * tests/store.scm ("substitute and large size"): New test. Ludovic Courtès
2021-04-09daemon: 'guix substitute' replies on FD 4....This avoids the situation where error messages would unintentionally go to stderr and be wrongfully interpreted as a reply by the daemon. Fixes <https://bugs.gnu.org/46362>. This is a followup to ee3226e9d54891c7e696912245e4904435be191c. * guix/scripts/substitute.scm (display-narinfo-data): Add 'port' parameter and honor it. (process-query): Likewise. (process-substitution): Likewise. (%error-to-file-descriptor-4?, with-redirected-error-port): Remove. (%reply-file-descriptor): New variable. (guix-substitute): Remove use of 'with-redirected-error-port'. Define 'reply-port' and pass it to 'process-query' and 'process-substitution'. * nix/libstore/build.cc (SubstitutionGoal::handleChildOutput): Swap 'builderOut' and 'fromAgent'. * nix/libstore/local-store.cc (LocalStore::getLineFromSubstituter): Likewise. * tests/substitute.scm <top level>: Set '%reply-file-descriptor' rather than '%error-to-file-descriptor-4?'. Ludovic Courtès
2021-03-18daemon: Prevent privilege escalation with '--keep-failed' [security]....Fixes <https://bugs.gnu.org/47229>. Reported by Nathan Nye of WhiteBeam Security. * nix/libstore/build.cc (DerivationGoal::startBuilder): When 'useChroot' is true, add "/top" to 'tmpDir'. (DerivationGoal::deleteTmpDir): Adjust accordingly. When 'settings.keepFailed' is true, chown in two steps: first the "/top" sub-directory, and then rename "/top" to its parent. Ludovic Courtès
2020-12-19daemon: Delegate deduplication to 'guix substitute'....This removes the main source of latency between subsequent downloads. * nix/libstore/build.cc (SubstitutionGoal::tryToRun): Add a "deduplicate" key to ENV. (SubstitutionGoal::finished): Remove call to 'optimisePath'. * guix/scripts/substitute.scm (process-substitution)[destination-in-store?] [dump-file/deduplicate*]: New variables. Pass #:dump-file to 'restore-file'. * guix/scripts/substitute.scm (guix-substitute)[deduplicate?]: New variable. Pass #:deduplicate? to 'process-substitution'. * guix/serialization.scm (dump-file): Export and augment 'dump-file'. Ludovic Courtès
2020-12-19daemon: Do not reset timestamps and permissions on substituted items....'guix substitute' now takes care of it via 'restore-file'. * nix/libstore/build.cc (SubstitutionGoal::finished): Remove call to 'canonicalisePathMetaData'. Ludovic Courtès
2020-12-19daemon: Let 'guix substitute' perform hash checks....This way, the hash of the store item can be computed as it is restored, thereby avoiding an additional file tree traversal ('hashPath' call) later on in the daemon. Consequently, it should reduce latency between subsequent substitute downloads. This is a followup to 5ff521452b9ec2aae9ed8e4bb7bdc250a581f203. * guix/scripts/substitute.scm (narinfo-hash-algorithm+value): New procedure. (process-substitution): Wrap INPUT into a hash input port, 'hashed', and read from it. Compare the actual and expected hashes, and print a "hash-mismatch" status line when they differ. When they match, print not just "success" but also the nar hash and size. * nix/libstore/build.cc (class SubstitutionGoal)[expectedHashStr]: Remove. (SubstitutionGoal::finished): Tokenize 'status'. Parse it and handle "success" and "hash-mismatch" accordingly. Call 'hashPath' only when the returned hash is not SHA256. (SubstitutionGoal::handleChildOutput): Remove 'expectedHashStr' handling. * tests/substitute.scm ("substitute, invalid hash"): Rename to... ("substitute, invalid narinfo hash"): ... this. ("substitute, invalid hash"): New test. Ludovic Courtès
2020-12-08daemon: Raise an error if substituter doesn't send the expected hash....It was already impossible in practice for 'expectedHashStr' to be empty if 'status' == "success". * nix/libstore/build.cc (SubstitutionGoal::finished): Throw 'SubstError' when 'expectedHashStr' is empty. Ludovic Courtès
2020-12-08substitute: Cache and reuse connections while substituting....That way, when fetching a series of substitutes from the same server(s), the connection is reused instead of being closed/opened for each substitutes, which saves on network round trips and TLS handshakes. * guix/http-client.scm (http-fetch): Add #:keep-alive? and honor it. * guix/progress.scm (progress-report-port): Add #:close? parameter and honor it. * guix/scripts/substitute.scm (at-most): Return the tail as a second value. (fetch): Add #:port and #:keep-alive? and honor them. (%max-cached-connections): New variable. (open-connection-for-uri/cached, call-with-cached-connection): New procedures. (with-cached-connection): New macro. (process-substitution): Wrap 'fetch' call in 'with-cached-connection'. Pass #:close? to 'progress-report-port'. Ludovic Courtès