/* $NetBSD: coda_opstats.h,v 1.7 2021/07/24 22:30:59 andvar Exp $ */

/* $NetBSD: coda_opstats.h,v 1.7 2021/07/24 22:30:59 andvar Exp $ */

/*
*
* Coda: an Experimental Distributed File System
* Release 3.1
*
* Copyright (c) 1987-1998 Carnegie Mellon University
* All Rights Reserved
*
* Permission to use, copy, modify and distribute this software and its
* documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation, and
* that credit is given to Carnegie Mellon University in all documents
* and publicity pertaining to direct or indirect use of this code or its
* derivatives.
*
* CODA IS AN EXPERIMENTAL SOFTWARE SYSTEM AND IS KNOWN TO HAVE BUGS,
* SOME OF WHICH MAY HAVE SERIOUS CONSEQUENCES. CARNEGIE MELLON ALLOWS
* FREE USE OF THIS SOFTWARE IN ITS "AS IS" CONDITION. CARNEGIE MELLON
* DISCLAIMS ANY LIABILITY OF ANY KIND FOR ANY DAMAGES WHATSOEVER
* RESULTING DIRECTLY OR INDIRECTLY FROM THE USE OF THIS SOFTWARE OR OF
* ANY DERIVATIVE WORK.
*
* Carnegie Mellon encourages users of this software to return any
* improvements or extensions that they make, and to grant Carnegie
* Mellon the rights to redistribute these changes without encumbrance.
*
* @(#) coda/coda_opstats.h,v 1.1.1.1 1998/08/29 21:26:46 rvb Exp $
*/

/*
* operation stats: what the minicache can intercept that
* *isn't* seen by venus. These stats are kept to augment
* the stats maintained by the Volume-Session mechanism.
*/

/* vfsops:
* mount: not currently bounced to Venus
* umount: nope
* root: only first call, rest is cached.
* statfs: none (bogus)
* sync: none (bogus)
* vget: all
*/

#define CODA_MOUNT_STATS 0
#define CODA_UMOUNT_STATS 1
#define CODA_ROOT_STATS 2
#define CODA_STATFS_STATS 3
#define CODA_SYNC_STATS 4
#define CODA_VGET_STATS 5
#define CODA_VFSOPS_SIZE 6

/* vnodeops:
* open: all to venus
* close: all to venus
* rdrw: bogus. Maybe redirected to UFS.
* May call open/close for internal opens/closes
* (Does exec not call open?)
* ioctl: causes a lookupname
* passes through
* select: can't get there from here.
* getattr: can be satsified by cache
* setattr: all go through
* access: can be satisfied by cache
* readlink: can be satisfied by cache
* fsync: passes through
* inactive: passes through
* lookup: can be satisfied by cache
* create: passes through
* remove: passes through
* link: passes through
* rename: passes through
* mkdir: passes through
* rmdir: passes through
* symlink: passes through
* readdir: may be redirected to UFS
* may cause an "internal" open/close
*/

#define CODA_OPEN_STATS 0
#define CODA_CLOSE_STATS 1
#define CODA_RDWR_STATS 2
#define CODA_IOCTL_STATS 3
#define CODA_SELECT_STATS 4
#define CODA_GETATTR_STATS 5
#define CODA_SETATTR_STATS 6
#define CODA_ACCESS_STATS 7
#define CODA_READLINK_STATS 8
#define CODA_FSYNC_STATS 9
#define CODA_INACTIVE_STATS 10
#define CODA_LOOKUP_STATS 11
#define CODA_CREATE_STATS 12
#define CODA_REMOVE_STATS 13
#define CODA_LINK_STATS 14
#define CODA_RENAME_STATS 15
#define CODA_MKDIR_STATS 16
#define CODA_RMDIR_STATS 17
#define CODA_SYMLINK_STATS 18
#define CODA_READDIR_STATS 19
#define CODA_VNODEOPS_SIZE 20

/*
* I propose the following structures:
*/

struct coda_op_stats {
int opcode; /* vfs opcode */
long entries; /* number of times call attempted */
long sat_intrn; /* number of times call satisfied by cache */
long unsat_intrn; /* number of times call failed in cache, but
was not bounced to venus proper. */
long gen_intrn; /* number of times call generated internally */
/* (do we need that?) */
};

/*
* With each call to the minicache, we'll bump the counters whenever
* a call is satisfied internally (through the cache or through a
* redirect), and whenever an operation is caused internally.
* Then, we can add the total operations caught by the minicache
* to the world-wide totals, and leave a caveat for the specific
* graphs later.
*/