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GC: Handle ENOSPC creating/moving to the trash directory 

Issue #564.
This commit is contained in:
Eelco Dolstra 2015-06-30 21:41:26 +02:00 committed by Ludovic Courtès
parent 5e0a9ae2e2
commit 6e38685ef6
1 changed files with 23 additions and 8 deletions
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31
nix/libstore/gc.cc
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@ -376,6 +376,7 @@ struct LocalStore::GCState
bool gcKeepOutputs;
bool gcKeepDerivations;
unsigned long long bytesInvalidated;
bool moveToTrash = true;
Path trashDir;
bool shouldDelete;
GCState(GCResults & results_) : results(results_), bytesInvalidated(0) { }
@ -428,16 +429,23 @@ void LocalStore::deletePathRecursive(GCState & state, const Path & path)
not holding the global GC lock) we can delete the path without
being afraid that the path has become alive again. Otherwise
delete it right away. */
if (S_ISDIR(st.st_mode)) {
if (state.moveToTrash && S_ISDIR(st.st_mode)) {
// Estimate the amount freed using the narSize field. FIXME:
// if the path was not valid, need to determine the actual
// size.
state.bytesInvalidated += size;
if (chmod(path.c_str(), st.st_mode | S_IWUSR) == -1)
throw SysError(format("making `%1%' writable") % path);
Path tmp = state.trashDir + "/" + baseNameOf(path);
if (rename(path.c_str(), tmp.c_str()))
throw SysError(format("unable to rename `%1%' to `%2%'") % path % tmp);
try {
if (chmod(path.c_str(), st.st_mode | S_IWUSR) == -1)
throw SysError(format("making `%1%' writable") % path);
Path tmp = state.trashDir + "/" + baseNameOf(path);
if (rename(path.c_str(), tmp.c_str()))
throw SysError(format("unable to rename `%1%' to `%2%'") % path % tmp);
state.bytesInvalidated += size;
} catch (SysError & e) {
if (e.errNo == ENOSPC) {
printMsg(lvlInfo, format("note: can't create move `%1%': %2%") % path % e.msg());
deleteGarbage(state, path);
}
}
} else
deleteGarbage(state, path);
@ -636,7 +644,14 @@ void LocalStore::collectGarbage(const GCOptions & options, GCResults & results)
if (state.shouldDelete) {
if (pathExists(state.trashDir)) deleteGarbage(state, state.trashDir);
createDirs(state.trashDir);
try {
createDirs(state.trashDir);
} catch (SysError & e) {
if (e.errNo == ENOSPC) {
printMsg(lvlInfo, format("note: can't create trash directory: %1%") % e.msg());
state.moveToTrash = false;
}
}
}
/* Now either delete all garbage paths, or just the specified