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Use posix_fallocate to create /nix/var/nix/db/reserved

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This commit is contained in:
Eelco Dolstra 2015-06-22 15:54:55 +02:00
parent ba63ec6f39
commit 2bc9c84327
1 changed files with 11 additions and 1 deletions
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12
src/libstore/local-store.cc
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@ -289,7 +289,17 @@ LocalStore::LocalStore(bool reserveSpace)
struct stat st; struct stat st;
if (stat(reservedPath.c_str(), &st) == -1 || if (stat(reservedPath.c_str(), &st) == -1 ||
st.st_size != settings.reservedSize) st.st_size != settings.reservedSize)
writeFile(reservedPath, string(settings.reservedSize, 'X')); {
AutoCloseFD fd = open(reservedPath.c_str(), O_WRONLY | O_CREAT, 0600);
int res = -1;
#if HAVE_POSIX_FALLOCATE
res = posix_fallocate(fd, 0, settings.reservedSize);
#endif
if (res == -1) {
writeFull(fd, string(settings.reservedSize, 'X'));
ftruncate(fd, settings.reservedSize);
}
}
} }
else else
deletePath(reservedPath); deletePath(reservedPath);