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/** |
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* This file is part of the CernVM File System. |
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*/ |
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#include "swissknife_lease.h" |
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#include <vector> |
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#include "gateway_util.h" |
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#include "swissknife_lease_curl.h" |
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#include "swissknife_lease_json.h" |
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#include "util/logging.h" |
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#include "util/posix.h" |
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#include "util/string.h" |
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namespace { |
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bool CheckParams(const swissknife::CommandLease::Parameters &p) { |
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if (p.action != "acquire" && p.action != "drop") { |
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return false; |
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} |
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return true; |
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} |
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} // namespace |
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namespace swissknife { |
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enum LeaseError { |
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kLeaseSuccess, |
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kLeaseBusy, |
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kLeaseFailure, |
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kLeaseParamError, |
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kLeaseKeyParseError, |
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kLeaseCurlInitError, |
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kLeaseFileOpenError, |
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kLeaseCurlReqError, |
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}; |
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CommandLease::~CommandLease() { } |
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ParameterList CommandLease::GetParams() const { |
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ParameterList r; |
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r.push_back(Parameter::Mandatory('u', "repo service url")); |
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r.push_back(Parameter::Mandatory('a', "action (acquire or drop)")); |
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r.push_back(Parameter::Mandatory('k', "key file")); |
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r.push_back(Parameter::Mandatory('p', "lease path")); |
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return r; |
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} |
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int CommandLease::Main(const ArgumentList &args) { |
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Parameters params; |
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params.repo_service_url = *(args.find('u')->second); |
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params.action = *(args.find('a')->second); |
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params.key_file = *(args.find('k')->second); |
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params.lease_path = *(args.find('p')->second); |
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std::vector<std::string> tokens = SplitString(params.lease_path, '/'); |
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const std::string lease_fqdn = tokens.front(); |
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if (!CheckParams(params)) { |
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return kLeaseParamError; |
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} |
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// Initialize curl |
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if (curl_global_init(CURL_GLOBAL_ALL)) { |
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return kLeaseCurlInitError; |
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} |
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std::string key_id; |
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std::string secret; |
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if (!gateway::ReadKeys(params.key_file, &key_id, &secret)) { |
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LogCvmfs(kLogCvmfs, kLogStderr, "Error reading key file %s.", |
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params.key_file.c_str()); |
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return kLeaseKeyParseError; |
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} |
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LeaseError ret = kLeaseSuccess; |
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if (params.action == "acquire") { |
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CurlBuffer buffer; |
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if (MakeAcquireRequest(key_id, secret, params.lease_path, |
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params.repo_service_url, &buffer)) { |
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std::string session_token; |
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int max_api_version = 0; |
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const LeaseReply rep = ParseAcquireReply(buffer, &session_token, |
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&max_api_version); |
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switch (rep) { |
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case kLeaseReplySuccess: { |
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const std::string token_file_name = "/var/spool/cvmfs/" + lease_fqdn |
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+ "/session_token"; |
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if (!SafeWriteToFile(session_token, token_file_name, 0600) |
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|| !SafeWriteToFile( |
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gateway::MakeSessionTokenApiVersionRecord(max_api_version, |
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session_token), |
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gateway::SessionTokenApiVersionPath(token_file_name), |
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0600)) { |
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const int write_errno = errno; |
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unlink( |
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gateway::SessionTokenApiVersionPath(token_file_name).c_str()); |
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LogCvmfs(kLogCvmfs, kLogStderr, "Error opening file: %s", |
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std::strerror(write_errno)); |
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ret = kLeaseFileOpenError; |
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} |
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} break; |
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case kLeaseReplyBusy: |
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return kLeaseBusy; |
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break; |
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case kLeaseReplyFailure: |
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default: |
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return kLeaseFailure; |
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} |
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} else { |
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ret = kLeaseCurlReqError; |
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} |
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} else if (params.action == "drop") { |
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// Try to read session token from repository scratch directory |
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std::string session_token; |
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const std::string token_file_name = "/var/spool/cvmfs/" + lease_fqdn |
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+ "/session_token"; |
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FILE *token_file = std::fopen(token_file_name.c_str(), "r"); |
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if (token_file) { |
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GetLineFile(token_file, &session_token); |
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LogCvmfs(kLogCvmfs, kLogDebug, "Read session token from file: %s", |
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session_token.c_str()); |
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CurlBuffer buffer; |
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if (MakeEndRequest("DELETE", key_id, secret, session_token, |
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params.repo_service_url, "", &buffer)) { |
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if (kLeaseReplySuccess == ParseDropReply(buffer)) { |
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std::fclose(token_file); |
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if (unlink(token_file_name.c_str())) { |
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LogCvmfs(kLogCvmfs, kLogStderr, |
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"Warning - Could not delete session token file."); |
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} |
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unlink(gateway::SessionTokenApiVersionPath(token_file_name).c_str()); |
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return kLeaseSuccess; |
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} else { |
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LogCvmfs(kLogCvmfs, kLogStderr, "Could not drop active lease"); |
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ret = kLeaseFailure; |
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} |
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} else { |
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LogCvmfs(kLogCvmfs, kLogStderr, "Error making DELETE request"); |
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ret = kLeaseCurlReqError; |
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} |
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std::fclose(token_file); |
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} else { |
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LogCvmfs(kLogCvmfs, kLogStderr, "Error reading session token from file"); |
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ret = kLeaseFileOpenError; |
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} |
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} |
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return ret; |
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} |
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} // namespace swissknife |
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