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Diffstat (limited to 'sys/fs/coda/cnode.h')
| -rw-r--r-- | sys/fs/coda/cnode.h | 208 |
1 files changed, 208 insertions, 0 deletions
diff --git a/sys/fs/coda/cnode.h b/sys/fs/coda/cnode.h new file mode 100644 index 0000000..75d29ac --- /dev/null +++ b/sys/fs/coda/cnode.h @@ -0,0 +1,208 @@ +/* + * + * 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. + * + * @(#) src/sys/coda/cnode.h,v 1.1.1.1 1998/08/29 21:14:52 rvb Exp $ + * $FreeBSD$ + * + */ + +/* + * 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 <sys/vnode.h> +#include <sys/lock.h> +#include <machine/clock.h> + +MALLOC_DECLARE(M_CODA); + +/* + * tmp below since we need struct queue + */ +#include <coda/coda_kernel.h> + +/* + * 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 (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 (0) + +struct cnode { + struct vnode *c_vnode; + u_short c_flags; /* flags (see below) */ + ViceFid c_fid; /* file handle */ + struct lock c_lock; /* new lock protocol */ + 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 */ + struct cnode *c_next; /* links if on NetBSD machine */ +}; +#define VTOC(vp) ((struct cnode *)(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_WANTED 0x08 /* Set if lock wanted */ +#define C_LOCKED 0x10 /* Set if lock held */ +#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 vcomm { + u_long vc_seq; + struct selinfo vc_selproc; + struct queue vc_requests; + struct queue vc_replys; +}; + +#define VC_OPEN(vcp) ((vcp)->vc_requests.forw != NULL) +#define MARK_VC_CLOSED(vcp) (vcp)->vc_requests.forw = NULL; +#define MARK_VC_OPEN(vcp) /* MT */ + +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; +}; +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) + +/* + * 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 *mntinfo, int inSize, int *outSize, caddr_t buffer); +extern int coda_kernel_version; + +/* cfs_subr.h */ +extern int handleDownCall(int opcode, union outputArgs *out); +extern void coda_unmounting(struct mount *whoIam); +extern int coda_vmflush(struct cnode *cp); + +/* cfs_vnodeops.h */ +extern struct cnode *make_coda_node(ViceFid *fid, struct mount *vfsp, short type); +extern int coda_vnodeopstats_init(void); + +/* coda_vfsops.h */ +extern struct mount *devtomp(dev_t dev); + +/* sigh */ +#define CODA_RDWR ((u_long) 31) + +#endif /* _CNODE_H_ */ + |
