1 /* $NetBSD: cnode.h,v 1.21 2024/05/17 23:56:24 thorpej Exp $ */ 2 3 /* 4 * 5 * Coda: an Experimental Distributed File System 6 * Release 3.1 7 * 8 * Copyright (c) 1987-1998 Carnegie Mellon University 9 * All Rights Reserved 10 * 11 * Permission to use, copy, modify and distribute this software and its 12 * documentation is hereby granted, provided that both the copyright 13 * notice and this permission notice appear in all copies of the 14 * software, derivative works or modified versions, and any portions 15 * thereof, and that both notices appear in supporting documentation, and 16 * that credit is given to Carnegie Mellon University in all documents 17 * and publicity pertaining to direct or indirect use of this code or its 18 * derivatives. 19 * 20 * CODA IS AN EXPERIMENTAL SOFTWARE SYSTEM AND IS KNOWN TO HAVE BUGS, 21 * SOME OF WHICH MAY HAVE SERIOUS CONSEQUENCES. CARNEGIE MELLON ALLOWS 22 * FREE USE OF THIS SOFTWARE IN ITS "AS IS" CONDITION. CARNEGIE MELLON 23 * DISCLAIMS ANY LIABILITY OF ANY KIND FOR ANY DAMAGES WHATSOEVER 24 * RESULTING DIRECTLY OR INDIRECTLY FROM THE USE OF THIS SOFTWARE OR OF 25 * ANY DERIVATIVE WORK. 26 * 27 * Carnegie Mellon encourages users of this software to return any 28 * improvements or extensions that they make, and to grant Carnegie 29 * Mellon the rights to redistribute these changes without encumbrance. 30 * 31 * @(#) coda/cnode.h,v 1.1.1.1 1998/08/29 21:26:46 rvb Exp $ 32 */ 33 34 /* 35 * Mach Operating System 36 * Copyright (c) 1990 Carnegie-Mellon University 37 * Copyright (c) 1989 Carnegie-Mellon University 38 * All rights reserved. The CMU software License Agreement specifies 39 * the terms and conditions for use and redistribution. 40 */ 41 42 /* 43 * This code was written for the Coda file system at Carnegie Mellon University. 44 * Contributers include David Steere, James Kistler, and M. Satyanarayanan. 45 */ 46 47 #ifndef _CNODE_H_ 48 #define _CNODE_H_ 49 50 #include <sys/vnode.h> 51 #ifdef _KERNEL 52 #include <sys/malloc.h> 53 54 MALLOC_DECLARE(M_CODA); 55 #endif 56 57 /* 58 * Cnode lookup stuff. 59 * NOTE: CODA_CACHESIZE must be a power of 2 for cfshash to work! 60 */ 61 #define CODA_CACHESIZE 512 62 63 #define CODA_ALLOC(ptr, cast, size) \ 64 do { \ 65 ptr = (cast)malloc((unsigned long) size, M_CODA, M_WAITOK); \ 66 if (ptr == 0) { \ 67 panic("kernel malloc returns 0 at %s:%d\n", __FILE__, __LINE__); \ 68 } \ 69 } while (/*CONSTCOND*/ 0) 70 71 #define CODA_FREE(ptr, size) free((ptr), M_CODA) 72 73 /* 74 * global cache state control 75 */ 76 extern int coda_nc_use; 77 78 /* 79 * Used to select debugging statements throughout the cfs code. 80 */ 81 extern int codadebug; 82 extern int coda_nc_debug; 83 extern int coda_printf_delay; 84 extern int coda_vnop_print_entry; 85 extern int coda_psdev_print_entry; 86 extern int coda_vfsop_print_entry; 87 88 #define CODADBGMSK(N) (1 << N) 89 #define CODADEBUG(N, STMT) { if (codadebug & CODADBGMSK(N)) { STMT } } 90 #define myprintf(args) \ 91 do { \ 92 if (coda_printf_delay) \ 93 DELAY(coda_printf_delay);\ 94 printf args ; \ 95 } while (/*CONSTCOND*/ 0) 96 97 struct cnode { 98 struct vnode *c_vnode; 99 u_short c_flags; /* flags (see below) */ 100 CodaFid c_fid; /* file handle */ 101 struct vnode *c_ovp; /* open vnode pointer */ 102 u_short c_ocount; /* count of openers */ 103 u_short c_owrite; /* count of open for write */ 104 struct vattr c_vattr; /* attributes */ 105 char *c_symlink; /* pointer to symbolic link */ 106 u_short c_symlen; /* length of symbolic link */ 107 dev_t c_device; /* associated vnode device */ 108 ino_t c_inode; /* associated vnode inode */ 109 kmutex_t c_lock; 110 }; 111 #define VTOC(vp) ((struct cnode *)(vp)->v_data) 112 #define SET_VTOC(vp) ((vp)->v_data) 113 #define CTOV(cp) ((struct vnode *)((cp)->c_vnode)) 114 115 /* flags */ 116 #define C_VATTR 0x01 /* Validity of vattr in the cnode */ 117 #define C_SYMLINK 0x02 /* Validity of symlink pointer in the Code */ 118 #define C_UNMOUNTING 0X20 /* Set if unmounting */ 119 #define C_PURGING 0x40 /* Set if purging a fid */ 120 121 #define VALID_VATTR(cp) ((cp->c_flags) & C_VATTR) 122 #define VALID_SYMLINK(cp) ((cp->c_flags) & C_SYMLINK) 123 #define IS_UNMOUNTING(cp) ((cp)->c_flags & C_UNMOUNTING) 124 125 struct vmsg; 126 127 struct vcomm { 128 u_long vc_seq; 129 int vc_open; 130 struct selinfo vc_selproc; 131 TAILQ_HEAD(,vmsg) vc_requests; 132 TAILQ_HEAD(,vmsg) vc_replies; 133 }; 134 135 #define VC_OPEN(vcp) ((vcp)->vc_open == 1) 136 #define MARK_VC_CLOSED(vcp) ((vcp)->vc_open = 0) 137 #define MARK_VC_OPEN(vcp) ((vcp)->vc_open = 1) 138 139 struct coda_clstat { 140 int ncalls; /* client requests */ 141 int nbadcalls; /* upcall failures */ 142 int reqs[CODA_NCALLS]; /* count of each request */ 143 }; 144 extern struct coda_clstat coda_clstat; 145 146 /* 147 * CODA structure to hold mount/file system information 148 */ 149 struct coda_mntinfo { 150 struct vnode *mi_rootvp; 151 struct mount *mi_vfsp; 152 struct vcomm mi_vcomm; 153 int mi_started; 154 }; 155 extern struct coda_mntinfo coda_mnttbl[]; /* indexed by minor device number */ 156 157 /* 158 * vfs pointer to mount info 159 */ 160 #define vftomi(vfsp) ((struct coda_mntinfo *)(vfsp->mnt_data)) 161 #define CODA_MOUNTED(vfsp) ((vftomi(vfsp) != (struct coda_mntinfo *)0) \ 162 && (vftomi(vfsp)->mi_started)) 163 164 /* 165 * vnode pointer to mount info 166 */ 167 #define vtomi(vp) ((struct coda_mntinfo *)(vp->v_mount->mnt_data)) 168 169 /* 170 * Used for identifying usage of "Control" object 171 */ 172 extern struct vnode *coda_ctlvp; 173 #define IS_CTL_VP(vp) ((vp) == coda_ctlvp) 174 #define IS_CTL_NAME(vp, name, l)((l == CODA_CONTROLLEN) \ 175 && ((vp) == vtomi((vp))->mi_rootvp) \ 176 && strncmp(name, CODA_CONTROL, l) == 0) 177 178 /* 179 * An enum to tell us whether something that will remove a reference 180 * to a cnode was a downcall or not 181 */ 182 enum dc_status { 183 IS_DOWNCALL = 6, 184 NOT_DOWNCALL = 7 185 }; 186 187 /* cfs_psdev.h */ 188 extern int coda_call(struct coda_mntinfo *, int, int *, void *); 189 extern int coda_kernel_version; 190 191 /* cfs_subr.h */ 192 extern int handleDownCall(int, union outputArgs *); 193 extern void coda_unmounting(struct mount *); 194 extern int coda_vmflush(struct cnode *); 195 196 /* cfs_vnodeops.h */ 197 extern struct cnode *make_coda_node(CodaFid *, struct mount *, short); 198 extern int coda_vnodeopstats_init(void); 199 200 /* coda_vfsops.h */ 201 extern struct mount *devtomp(dev_t); 202 203 /* sigh */ 204 #define CODA_RDWR ((u_long) 31) 205 206 #endif /* _CNODE_H_ */ 207 208
Indexes created Sun Sep 21 20:09:37 GMT 2025