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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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* cvmfs_talk runs query-response cycles against a running cvmfs instance. |
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*/ |
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#include <errno.h> |
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#include <unistd.h> |
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#include <cassert> |
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#include <cstring> |
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#include <string> |
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#include <vector> |
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#include "options.h" |
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#include "util/logging.h" |
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#include "util/pointer.h" |
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#include "util/posix.h" |
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#include "util/string.h" |
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struct InstanceInfo { |
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bool IsDefined() { |
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return !socket_path.empty() || !instance_name.empty(); |
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} |
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// Called at most once by DeterminePath |
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static std::string GetDefaultDomain() { |
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std::string result; |
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BashOptionsManager options_mgr; |
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options_mgr.ParseDefault(""); |
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bool retval = options_mgr.GetValue("CVMFS_DEFAULT_DOMAIN", &result); |
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if (!retval) { |
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LogCvmfs(kLogCvmfs, kLogStderr, |
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"Error: could not determine CVMFS_DEFAULT_DOMAIN"); |
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} |
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return result; |
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} |
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bool DeterminePaths() { |
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std::string fqrn = instance_name; |
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if (fqrn.find('.') == std::string::npos) { |
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static std::string default_domain = GetDefaultDomain(); |
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fqrn = fqrn + "." + default_domain; |
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} |
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BashOptionsManager options_mgr; |
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options_mgr.ParseDefault(fqrn); |
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if (!options_mgr.GetValue("CVMFS_WORKSPACE", &workspace)) { |
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if (!options_mgr.GetValue("CVMFS_CACHE_DIR", &workspace)) { |
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bool retval = options_mgr.GetValue("CVMFS_CACHE_BASE", &workspace); |
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if (!retval) { |
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LogCvmfs(kLogCvmfs, kLogStderr, |
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"CVMFS_WORKSPACE, CVMFS_CACHE_DIR, and CVMFS_CACHE_BASE " |
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"missing"); |
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return false; |
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} |
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std::string optarg; |
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if (options_mgr.GetValue("CVMFS_SHARED_CACHE", &optarg) && |
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options_mgr.IsOn(optarg)) |
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{ |
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workspace += "/shared"; |
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} else { |
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workspace += "/" + fqrn; |
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} |
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} |
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} |
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socket_path = workspace + "/cvmfs_io." + fqrn; |
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return true; |
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} |
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bool CompleteInfo() { |
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assert(IsDefined()); |
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if (socket_path.empty()) { |
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bool retval = DeterminePaths(); |
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if (!retval) |
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return false; |
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identifier = "instance '" + instance_name + "' active in " + workspace; |
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} else { |
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workspace = GetParentPath(socket_path); |
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identifier = "instance listening at " + socket_path; |
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} |
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return true; |
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} |
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std::string socket_path; |
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std::string instance_name; |
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std::string workspace; |
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std::string identifier; |
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}; |
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static bool ReadResponse(int fd) { |
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std::string line; |
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char buf; |
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int retval; |
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while ((retval = read(fd, &buf, 1)) == 1) { |
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if (buf == '\n') { |
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LogCvmfs(kLogCvmfs, kLogStdout, "%s", line.c_str()); |
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line.clear(); |
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continue; |
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} |
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line.push_back(buf); |
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} |
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return retval == 0; |
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} |
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bool SendCommand(const std::string &command, InstanceInfo instance_info) { |
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bool retval = instance_info.CompleteInfo(); |
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if (!retval) return false; |
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int fd = ConnectSocket(instance_info.socket_path); |
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if (fd < 0) { |
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if (errno == ENOENT) { |
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LogCvmfs(kLogCvmfs, kLogStderr, |
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"Seems like CernVM-FS is not running in %s (not found: %s)", |
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instance_info.workspace.c_str(), |
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instance_info.socket_path.c_str()); |
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} else { |
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LogCvmfs(kLogCvmfs, kLogStderr, "Could not access %s (%d - %s)", |
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instance_info.identifier.c_str(), errno, strerror(errno)); |
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} |
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return false; |
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} |
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WritePipe(fd, command.data(), command.size()); |
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retval = ReadResponse(fd); |
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close(fd); |
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if (!retval) { |
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LogCvmfs(kLogCvmfs, kLogStderr, "Broken connection to %s (%d - %s)", |
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instance_info.identifier.c_str(), errno, strerror(errno)); |
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return false; |
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} |
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return true; |
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} |
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static void Usage(const std::string &exe) { |
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LogCvmfs(kLogCvmfs, kLogStdout, |
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"Usage: %s [-i instance | -p socket] <command> \n" |
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" By default, iterate through all instances defined in \n" |
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" CVMFS_REPOSITORIES \n" |
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"\n" |
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"Example: \n" |
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" %s -i atlas.cern.ch pid \n" |
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"\n" |
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"Commands: \n" |
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" tracebuffer flush flushes the trace buffer to disk \n" |
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" cache instance describes the active cache manager \n" |
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" cache size gets current size of file cache \n" |
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" cache limit get gets current size limit of the file cache\n" |
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" cache limit set <MB> sets the max size limit of the file cache\n" |
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" cache list gets files in cache \n" |
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" cache list pinned gets pinned file catalogs in cache \n" |
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" cache list catalogs gets all file catalogs in cache \n" |
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" cleanup <MB> cleans file cache until size <= <MB> \n" |
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" cleanup rate <period> n.o. cleanups in the last <period> min \n" |
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" evict <path> removes <path> from the cache \n" |
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" pin <path> pins <path> in the cache \n" |
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" mountpoint returns the mount point \n" |
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" device id returns major:minor virtual device id \n" |
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" on Linux and 0:0 on macOS \n" |
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" remount [sync] look for new catalogs \n" |
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" revision gets the repository revision \n" |
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" max ttl info gets the maximum ttl \n" |
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" max ttl set <minutes> sets the maximum ttl \n" |
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" nameserver get get the DNS server \n" |
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" nameserver set <host> sets a DNS server \n" |
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" host info get host chain and their rtt, \n" |
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" if already probed \n" |
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" host probe orders the host chain according to rtt \n" |
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" host probe geo let Stratum 1s order the host chain and \n" |
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" fallback proxies using the Geo-API \n" |
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" host switch switches to the next host in the chain \n" |
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" host set <host list> sets a new host chain \n" |
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" proxy info gets load-balance proxy groups \n" |
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" proxy rebalance randomly selects a new proxy server \n" |
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" from the current load-balance group \n" |
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" proxy group switch switches to the next load-balance \n" |
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" proxy group in the chain \n" |
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" proxy set <proxy list> sets a new chain of load-balance proxy \n" |
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" groups (not including fallback proxies) \n" |
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" proxy fallback <list> sets a new list of fallback proxies \n" |
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" external host info gets info about external host chain \n" |
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" external host switch switches to the next external host \n" |
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" external host set \n" |
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" <host list> sets external host chain \n" |
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" external proxy info gets info about external proxy groups \n" |
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" external proxy set \n" |
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" <proxy list> sets chain of external proxy groups \n" |
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" timeout info gets the network timeouts \n" |
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" timeout set \n" |
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" <proxy> <direct> sets the network timeouts in seconds \n" |
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" pid gets the pid \n" |
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" pid cachemgr gets the pid of the shared cache manager \n" |
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" pid watchdog gets the pid of the crash handler process\n" |
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" parameters dumps the effective parameters \n" |
| 203 |
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" reset error counters resets the counter for I/O errors \n" |
| 204 |
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" hotpatch history shows timestamps and version info of \n" |
| 205 |
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" loaded (hotpatched) Fuse modules \n" |
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" version gets cvmfs version \n" |
| 207 |
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" version patchlevel gets cvmfs patchlevel \n" |
| 208 |
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" open catalogs shows information about currently \n" |
| 209 |
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" loaded catalogs (_not_ all cached ones) \n" |
| 210 |
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" latency show the latencies of different fuse \n" |
| 211 |
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" calls (requires CVMFS_INSTRUMENT_FUSE) \n" |
| 212 |
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"\n", |
| 213 |
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exe.c_str(), exe.c_str()); |
| 214 |
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} |
| 215 |
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| 216 |
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| 217 |
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int main(int argc, char *argv[]) { |
| 218 |
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InstanceInfo instance_info; |
| 219 |
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std::string command; |
| 220 |
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| 221 |
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int c; |
| 222 |
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// 's' for socket would have been a better option letter but we keep 'p' |
| 223 |
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// for backwards compatibility. The '+' at the beginning of the option string |
| 224 |
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// prevents permutation of the option and non-option arguments. |
| 225 |
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while ((c = getopt(argc, argv, "+hi:p:")) != -1) { |
| 226 |
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switch (c) { |
| 227 |
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case 'h': |
| 228 |
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Usage(argv[0]); |
| 229 |
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return 0; |
| 230 |
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case 'p': |
| 231 |
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instance_info.socket_path = optarg; |
| 232 |
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break; |
| 233 |
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case 'i': |
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instance_info.instance_name = optarg; |
| 235 |
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break; |
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case '?': |
| 237 |
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default: |
| 238 |
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Usage(argv[0]); |
| 239 |
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return 1; |
| 240 |
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} |
| 241 |
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} |
| 242 |
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| 243 |
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for (; optind < argc; ++optind) { |
| 244 |
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command += argv[optind]; |
| 245 |
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if (optind < (argc - 1)) |
| 246 |
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command.push_back(' '); |
| 247 |
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} |
| 248 |
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if (command.empty()) { |
| 249 |
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Usage(argv[0]); |
| 250 |
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return 1; |
| 251 |
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} |
| 252 |
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| 253 |
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int retcode = 0; |
| 254 |
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if (!instance_info.IsDefined()) { |
| 255 |
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BashOptionsManager options_mgr; |
| 256 |
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options_mgr.ParseDefault(""); |
| 257 |
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std::string opt_repos; |
| 258 |
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options_mgr.GetValue("CVMFS_REPOSITORIES", &opt_repos); |
| 259 |
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std::vector<std::string> repos = SplitString(opt_repos, ','); |
| 260 |
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bool is_empty_repo_list = true; |
| 261 |
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for (unsigned i = 0; i < repos.size(); ++i) { |
| 262 |
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if (repos[i].empty()) |
| 263 |
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continue; |
| 264 |
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is_empty_repo_list = false; |
| 265 |
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instance_info.instance_name = repos[i]; |
| 266 |
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LogCvmfs(kLogCvmfs, kLogStdout, "%s:", repos[i].c_str()); |
| 267 |
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bool retval = SendCommand(command, instance_info); |
| 268 |
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if (!retval) retcode = 1; |
| 269 |
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} |
| 270 |
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if (is_empty_repo_list) { |
| 271 |
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LogCvmfs(kLogCvmfs, kLogStdout, |
| 272 |
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"Warning: no instance was specified. In this case, the command " |
| 273 |
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"is executed for all instances defined in CVMFS_REPOSITORIES but" |
| 274 |
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" this list is empty. Did you mean running \n\n" |
| 275 |
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" cvmfs_talk -i <repository name> <command>\n"); |
| 276 |
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} |
| 277 |
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} else { |
| 278 |
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bool retval = SendCommand(command, instance_info); |
| 279 |
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if (!retval) retcode = 1; |
| 280 |
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} |
| 281 |
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return retcode; |
| 282 |
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} |
| 283 |
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