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/libstore/optimise-store.cc (deduplicationMinSize): New variable. (LocalStore::optimisePath_): Return when PATH is a symlink or smaller than 'deduplicationMinSize'. * tests/derivations.scm ("identical files are deduplicated"): Produce files bigger than %DEDUPLICATION-MINIMUM-SIZE. * tests/nar.scm ("restore-file-set with directories (signed, valid)"): Likewise. * tests/store-deduplication.scm ("deduplicate, below %deduplication-minimum-size"): New test. ("deduplicate", "deduplicate, ENOSPC"): Produce files bigger than %DEDUPLICATION-MINIMUM-SIZE. * tests/store.scm ("substitute, deduplication"): Likewise. 2020-06-06daemon: Handle EXDEV when moving to trash directory.Chris Marusich Fixes <https://bugs.gnu.org/41607>. Reported by Stephen Scheck <singularsyntax@gmail.com>. * nix/libstore/gc.cc (LocalStore::deletePathRecursive): When we try to move a dead directory into the trashDir using rename(2) but it returns an EXDEV error, just delete the directory instead. This can happen in a Docker container when the directory is not on the "top layer". 2020-02-26daemon: Drop 'AT_STATX_DONT_SYNC' flag upon EINVAL.Ludovic Courtès Fixes <https://bugs.gnu.org/39727>. Reported by Paul Garlick <pgarlick@tourbillion-technology.com>. * nix/libstore/gc.cc (LocalStore::removeUnusedLinks) [HAVE_STATX]: Add 'statx_flags' static variables. Clear 'AT_STATX_DONT_SYNC' flag from 'statx_flags' when 'statx' returns EINVAL. 2020-01-12daemon: Fix the displayed GC estimated progress.Ludovic Courtès * nix/libstore/gc.cc (LocalStore::deletePathRecursive): Fix computation of 'fraction'. Take 'bytesInvalidated' into account. 2020-01-12daemon: Account for deleted store files when deduplication is on.Ludovic Courtès Previously, a store item that is a regular file would not be accounted for in the 'bytesFreed' value computed by 'deletePath' because its 'st_nlink' count would always be >= 2. This commit fixes that. * nix/libutil/util.hh (deletePath): Add optional 'linkThreshold' argument. * nix/libutil/util.cc (_deletePath): Add 'linkThreshold' argument and honor it. Pass it down in recursive call. (deletePath): Add 'linkThreshold' and honor it. * nix/libstore/gc.cc (LocalStore::deleteGarbage): Pass 'linkThreshold' argument to 'deletePath', with a value of 2 when PATH is a store item and deduplication is on. 2019-11-27daemon: GC remove-unused-links phase uses 'statx' when available.Ludovic Courtès * config-daemon.ac: Check for 'statx'. * nix/libstore/gc.cc (LocalStore::removeUnusedLinks) [HAVE_STATX]: Use 'statx' instead of 'lstat'. 2019-11-22daemon: GC displays how much it has collected.Ludovic Courtès * nix/libstore/gc.cc (LocalStore::deletePathRecursive): Display the percentage reached relative to 'maxFreed', or the total amount of data deleted when 'maxFreed' is ULLONG_MAX. 2019-10-16daemon: Remove traces of 'NIX_ROOT_FINDER'.Ludovic Courtès This is a followup to 2e3e5d21988fc2cafb2a9eaf4b00976ea425629d. * build-aux/test-env.in: Remove mentions of 'NIX_ROOT_FINDER'. * nix/libstore/gc.cc (LocalStore::collectGarbage): Adjust comment accordingly. 2019-09-08daemon: Invoke 'guix gc --list-busy' instead of 'list-runtime-roots'.Ludovic Courtès * nix/scripts/list-runtime-roots.in: Remove. * guix/store/roots.scm (%proc-directory): New variable. (proc-file-roots, proc-exe-roots, proc-cwd-roots) (proc-fd-roots, proc-maps-roots, proc-environ-roots) (referenced-files, canonicalize-store-item, busy-store-items): New procedures, taken from 'list-runtime-roots.in'. * nix/libstore/globals.hh (Settings)[guixProgram]: New field. * nix/libstore/globals.cc (Settings::processEnvironment): Initialize 'guixProgram'. * nix/libstore/gc.cc (addAdditionalRoots): Drop code related to 'NIX_ROOT_FINDER'. Run "guix gc --list-busy". * nix/local.mk (nodist_pkglibexec_SCRIPTS): Remove 'scripts/list-runtime-roots'. * config-daemon.ac: Don't output nix/scripts/list-runtime-roots. * build-aux/pre-inst-env.in: Don't set 'NIX_ROOT_FINDER'. Set 'GUIX'. * doc/guix.texi (Invoking guix gc): Document '--list-busy'. * guix/scripts/gc.scm (show-help, %options): Add "--list-busy". (guix-gc)[list-busy]: New procedure. Handle the 'list-busy' action. 2019-08-30daemon: Don't reply on 'st_blocks'.Eelco Dolstra Ported by Ludovic Courtès <ludo@gnu.org> from <https://github.com/NixOS/nix/commit/a2c4fcd5e9782dc8d2998773380c7171ee53b813>. * nix/libstore/gc.cc (LocalStore::removeUnusedLinks): Use 'st.st_size' instead of 'st.st_blocks * 512'. * nix/libutil/util.cc (_deletePath): Likewise.