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Fall back to copyPath if link fails with EPERM

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BeeGFS doesn't allow hard-links and returns EPERM, so we fall back
to copyPath. See https://github.com/NixOS/nix/issues/3748
This commit is contained in:
Rodrigo 2020-06-25 12:03:26 +02:00
parent 3c50e84387
commit 3a642187c3
1 changed files with 5 additions and 2 deletions
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7
src/libstore/build.cc
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@ -1950,8 +1950,11 @@ void linkOrCopy(const Path & from, const Path & to)
/* Hard-linking fails if we exceed the maximum link count on a /* Hard-linking fails if we exceed the maximum link count on a
file (e.g. 32000 of ext3), which is quite possible after a file (e.g. 32000 of ext3), which is quite possible after a
'nix-store --optimise'. FIXME: actually, why don't we just 'nix-store --optimise'. FIXME: actually, why don't we just
bind-mount in this case? */ bind-mount in this case?
if (errno != EMLINK)
It can also fail with EPERM in BeegFS v7 and earlier versions
which don't allow hard-links to other directories */
if (errno != EMLINK && errno != EPERM)
throw SysError("linking '%s' to '%s'", to, from); throw SysError("linking '%s' to '%s'", to, from);
copyPath(from, to); copyPath(from, to);
} }