-
/*
- * $Id: DiskdIOStrategy.h,v 1.3 2007/01/31 07:13:54 wessels Exp $
- *
- * DEBUG: section 79 Squid-side DISKD I/O functions.
- * AUTHOR: Duane Wessels
- *
- * SQUID Web Proxy Cache http://www.squid-cache.org/
- * ----------------------------------------------------------
- *
- * Squid is the result of efforts by numerous individuals from
- * the Internet community; see the CONTRIBUTORS file for full
- * details. Many organizations have provided support for Squid's
- * development; see the SPONSORS file for full details. Squid is
- * Copyrighted (C) 2001 by the Regents of the University of
- * California; see the COPYRIGHT file for full details. Squid
- * incorporates software developed and/or copyrighted by other
- * sources; see the CREDITS file for full details.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program 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 General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
+ * Copyright (C) 1996-2015 The Squid Software Foundation and contributors
*
- * Copyright (c) 2003, Robert Collins <robertc@squid-cache.org>
+ * Squid software is distributed under GPLv2+ license and includes
+ * contributions from numerous individuals and organizations.
+ * Please see the COPYING and CONTRIBUTORS files for details.
*/
+/* DEBUG: section 79 Squid-side DISKD I/O functions. */
+
#ifndef __STORE_DISKDIOSTRATEGY_H__
#define __STORE_DISKDIOSTRATEGY_H__
-/*
- * magic2 is the point at which we start blocking on msgsnd/msgrcv.
- * If a queue has magic2 (or more) messages away, then we read the
- * queue until the level falls below magic2. Recommended value
- * is 75% of SHMBUFS. magic1 is the number of messages away which we
- * stop allowing open/create for.
- */
-
struct diomsg;
+/// \ingroup diskd
class SharedMemory
{
public:
- void put(off_t);
+ void put(ssize_t);
- void *get
- (off_t *);
+ void *get(ssize_t *);
- void init (int ikey, int magic2);
+ void init(int ikey, int magic2);
int nbufs;
class DiskFile;
class DiskdFile;
-
+class Lock;
class ReadRequest;
+/// \ingroup diskd
class DiskdIOStrategy : public DiskIOStrategy
{
virtual bool shedLoad();
virtual int load();
virtual RefCount<DiskFile> newFile(char const *path);
+ virtual bool unlinkdUseful() const;
virtual void unlinkFile (char const *);
virtual ConfigOption *getOptionTree() const;
virtual void init();
virtual void sync();
virtual int callback();
- virtual void statfs(StoreEntry & sentry)const;
- int send(int mtype, int id, DiskdFile *theFile, int size, int offset, off_t shm_offset, RefCountable_ *);
- /* public for accessing return address's */
+ virtual void statfs(StoreEntry & sentry) const;
+ int send(int mtype, int id, DiskdFile *theFile, size_t size, off_t offset, ssize_t shm_offset, Lock *requestor);
+
+ /** public for accessing return address's */
SharedMemory shm;
private:
void optionQ1Dump(StoreEntry * e) const;
bool optionQ2Parse(char const *option, const char *value, int reconfiguring);
void optionQ2Dump(StoreEntry * e) const;
- int send(int mtype, int id, RefCount<StoreIOState> sio, int size, int offset, off_t shm_offset);
- int SEND(diomsg * M, int mtype, int id, int size, int offset, off_t shm_offset);
+ int send(int mtype, int id, RefCount<StoreIOState> sio, size_t size, off_t offset, ssize_t shm_offset);
+ int SEND(diomsg * M, int mtype, int id, size_t size, off_t offset, ssize_t shm_offset);
void handle(diomsg * M);
void unlinkDone(diomsg * M);
+
+ /**
+ * magic1 is the number of messages away which we
+ * stop allowing open/create for.
+ */
int magic1;
+
+ /**
+ * magic2 is the point at which we start blocking on msgsnd/msgrcv.
+ * If a queue has magic2 (or more) messages away, then we read the
+ * queue until the level falls below magic2. Recommended value
+ * is 75% of SHMBUFS.
+ */
int magic2;
+
int away;
int smsgid;
int rmsgid;
size_t instanceID;
};
+/// \ingroup diskd
#define SHMBUF_BLKSZ SM_PAGE_SIZE
-
-struct diskd_stats_t
-{
+/// \ingroup diskd
+struct diskd_stats_t {
int open_fail_queue_len;
int block_queue_len;
int max_away;
int recv_count;
int sio_id;
- struct
- {
+ struct {
int ops;
int success;
int fail;
open, create, close, unlink, read, write;
};
+/// \ingroup diskd
extern diskd_stats_t diskd_stats;
#endif
+