/* $NetBSD: cnode.h,v 1.20 2014/12/13 15:59:30 hannken 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/cnode.h,v 1.1.1.1 1998/08/29 21:26:46 rvb Exp $ */ /* * Mach Operating System * Copyright (c) 1990 Carnegie-Mellon University * Copyright (c) 1989 Carnegie-Mellon University * All rights reserved. The CMU software License Agreement specifies * the terms and conditions for use and redistribution. */ /* * This code was written for the Coda file system at Carnegie Mellon University. * Contributers include David Steere, James Kistler, and M. Satyanarayanan. */ #ifndef _CNODE_H_ #define _CNODE_H_ #include #ifdef _KERNEL #include MALLOC_DECLARE(M_CODA); #endif /* * Cnode lookup stuff. * NOTE: CODA_CACHESIZE must be a power of 2 for cfshash to work! */ #define CODA_CACHESIZE 512 #define CODA_ALLOC(ptr, cast, size) \ do { \ ptr = (cast)malloc((unsigned long) size, M_CODA, M_WAITOK); \ if (ptr == 0) { \ panic("kernel malloc returns 0 at %s:%d\n", __FILE__, __LINE__); \ } \ } while (/*CONSTCOND*/ 0) #define CODA_FREE(ptr, size) free((ptr), M_CODA) /* * global cache state control */ extern int coda_nc_use; /* * Used to select debugging statements throughout the cfs code. */ extern int codadebug; extern int coda_nc_debug; extern int coda_printf_delay; extern int coda_vnop_print_entry; extern int coda_psdev_print_entry; extern int coda_vfsop_print_entry; #define CODADBGMSK(N) (1 << N) #define CODADEBUG(N, STMT) { if (codadebug & CODADBGMSK(N)) { STMT } } #define myprintf(args) \ do { \ if (coda_printf_delay) \ DELAY(coda_printf_delay);\ printf args ; \ } while (/*CONSTCOND*/ 0) struct cnode { struct vnode *c_vnode; u_short c_flags; /* flags (see below) */ CodaFid c_fid; /* file handle */ struct vnode *c_ovp; /* open vnode pointer */ u_short c_ocount; /* count of openers */ u_short c_owrite; /* count of open for write */ struct vattr c_vattr; /* attributes */ char *c_symlink; /* pointer to symbolic link */ u_short c_symlen; /* length of symbolic link */ dev_t c_device; /* associated vnode device */ ino_t c_inode; /* associated vnode inode */ kmutex_t c_lock; }; #define VTOC(vp) ((struct cnode *)(vp)->v_data) #define SET_VTOC(vp) ((vp)->v_data) #define CTOV(cp) ((struct vnode *)((cp)->c_vnode)) /* flags */ #define C_VATTR 0x01 /* Validity of vattr in the cnode */ #define C_SYMLINK 0x02 /* Validity of symlink pointer in the Code */ #define C_UNMOUNTING 0X20 /* Set if unmounting */ #define C_PURGING 0x40 /* Set if purging a fid */ #define VALID_VATTR(cp) ((cp->c_flags) & C_VATTR) #define VALID_SYMLINK(cp) ((cp->c_flags) & C_SYMLINK) #define IS_UNMOUNTING(cp) ((cp)->c_flags & C_UNMOUNTING) struct vmsg; struct vcomm { u_long vc_seq; int vc_open; struct selinfo vc_selproc; TAILQ_HEAD(,vmsg) vc_requests; TAILQ_HEAD(,vmsg) vc_replies; }; #define VC_OPEN(vcp) ((vcp)->vc_open == 1) #define MARK_VC_CLOSED(vcp) ((vcp)->vc_open = 0) #define MARK_VC_OPEN(vcp) ((vcp)->vc_open = 1) struct coda_clstat { int ncalls; /* client requests */ int nbadcalls; /* upcall failures */ int reqs[CODA_NCALLS]; /* count of each request */ }; extern struct coda_clstat coda_clstat; /* * CODA structure to hold mount/file system information */ struct coda_mntinfo { struct vnode *mi_rootvp; struct mount *mi_vfsp; struct vcomm mi_vcomm; int mi_started; }; extern struct coda_mntinfo coda_mnttbl[]; /* indexed by minor device number */ /* * vfs pointer to mount info */ #define vftomi(vfsp) ((struct coda_mntinfo *)(vfsp->mnt_data)) #define CODA_MOUNTED(vfsp) ((vftomi(vfsp) != (struct coda_mntinfo *)0) \ && (vftomi(vfsp)->mi_started)) /* * vnode pointer to mount info */ #define vtomi(vp) ((struct coda_mntinfo *)(vp->v_mount->mnt_data)) /* * Used for identifying usage of "Control" object */ extern struct vnode *coda_ctlvp; #define IS_CTL_VP(vp) ((vp) == coda_ctlvp) #define IS_CTL_NAME(vp, name, l)((l == CODA_CONTROLLEN) \ && ((vp) == vtomi((vp))->mi_rootvp) \ && strncmp(name, CODA_CONTROL, l) == 0) /* * An enum to tell us whether something that will remove a reference * to a cnode was a downcall or not */ enum dc_status { IS_DOWNCALL = 6, NOT_DOWNCALL = 7 }; /* cfs_psdev.h */ extern int coda_call(struct coda_mntinfo *, int, int *, void *); extern int coda_kernel_version; /* cfs_subr.h */ extern int handleDownCall(int, union outputArgs *); extern void coda_unmounting(struct mount *); extern int coda_vmflush(struct cnode *); /* cfs_vnodeops.h */ extern struct cnode *make_coda_node(CodaFid *, struct mount *, short); extern int coda_vnodeopstats_init(void); /* coda_vfsops.h */ extern struct mount *devtomp(dev_t); /* sigh */ #define CODA_RDWR ((u_long) 31) #endif /* _CNODE_H_ */