/******************************************************************************/
/* */
/* X r d S s i S t a t . c c */
/* */
/* (c) 2014 by the Board of Trustees of the Leland Stanford, Jr., University */
/* All Rights Reserved */
/* Produced by Andrew Hanushevsky for Stanford University under contract */
/* DE-AC02-76-SFO0515 with the Department of Energy */
/* */
/* This file is part of the XRootD software suite. */
/* */
/* XRootD is free software: you can redistribute it and/or modify it under */
/* the terms of the GNU Lesser General Public License as published by the */
/* Free Software Foundation, either version 3 of the License, or (at your */
/* option) any later version. */
/* */
/* XRootD is distributed in the hope that it will be useful, but WITHOUT */
/* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or */
/* FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public */
/* License for more details. */
/* */
/* You should have received a copy of the GNU Lesser General Public License */
/* along with XRootD in a file called COPYING.LESSER (LGPL license) and file */
/* COPYING (GPL license). If not, see . */
/* */
/* The copyright holder's institutional names and contributor's names may not */
/* be used to endorse or promote products derived from this software without */
/* specific prior written permission of the institution or contributor. */
/******************************************************************************/
#include
#include
#include
#include
#include "XrdVersion.hh"
#include "XrdOss/XrdOss.hh"
#include "XrdOss/XrdOssStatInfo.hh"
#include "XrdOuc/XrdOucEnv.hh"
#include "XrdOuc/XrdOucPList.hh"
#include "XrdSsi/XrdSsiProvider.hh"
#include "XrdSsi/XrdSsiSfsConfig.hh"
#include "XrdSsi/XrdSsiService.hh"
#include "XrdSys/XrdSysError.hh"
//------------------------------------------------------------------------------
//! This file defines a default plug-in that can be used to handle stat()
//! calls for the Scalable Service Interface.
//------------------------------------------------------------------------------
/******************************************************************************/
/* E x t e r n s */
/******************************************************************************/
namespace XrdSsi
{
extern XrdSsiProvider *Provider;
extern XrdOucPListAnchor FSPath;
extern bool fsChk;
extern XrdSysError Log;
};
using namespace XrdSsi;
/******************************************************************************/
/* X r d S s i S t a t I n f o */
/******************************************************************************/
extern "C"
{
int XrdSsiStatInfo(const char *path, struct stat *buff,
int opts, XrdOucEnv *envP, const char *lfn)
{
static const int regFile = S_IFREG | S_IRUSR | S_IWUSR;
XrdSsiProvider::rStat rStat;
// Check for stat changes
//
if (!buff)
{if (!Provider || (fsChk && FSPath.Find(lfn))) return 0;
if (opts == XrdOssStatEvent::FileRemoved)
Provider->ResourceRemoved(lfn);
else Provider->ResourceAdded(lfn);
return 0;
}
// Check if this should be issued to the file system
//
if (fsChk && FSPath.Find(lfn)) return stat(path, buff);
// Check resource availability
//
if (Provider && (rStat = Provider->QueryResource(path)))
{memset(buff, 0, sizeof(struct stat));
buff->st_mode = regFile;
if (rStat == XrdSsiProvider::isPresent) return 0;
if (!(opts & XRDOSS_resonly)) {buff->st_mode |= S_IFBLK; return 0;}
}
// Resource is not available
//
errno = ENOENT;
return -1;
}
/******************************************************************************/
/* X r d O s s S t a t I n f o I n i t */
/******************************************************************************/
//------------------------------------------------------------------------------
//! The following function is invoked by the plugin manager to obtain the
//! function that is to be used for stat() calls.
//------------------------------------------------------------------------------
XrdOssStatInfo2_t XrdOssStatInfoInit2(XrdOss *native_oss,
XrdSysLogger *Logger,
const char *config_fn,
const char *parms,
XrdOucEnv *envP)
{
XrdSsiSfsConfig Config(true);
// Setup the logger
//
Log.logger(Logger);
// Process the configuration file so that we get the service provider object
//
if (!Config.Configure(config_fn) || !Config.Configure(envP))
return 0;
// Return the stat function
//
return (XrdOssStatInfo2_t)XrdSsiStatInfo;
}
};
/******************************************************************************/
/* V e r s i o n I n f o r m a t i o n */
/******************************************************************************/
XrdVERSIONINFO(XrdOssStatInfoInit,XrdSsiStat);