1 /* $NetBSD: cnode.h,v 1.13 2003/08/27 17:49:48 drochner 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/mallocvar.h> 53 54 MALLOC_DECLARE(M_CODA); 55 #endif 56 57 /* 58 * tmp below since we need struct queue 59 */ 60 #include <coda/coda_kernel.h> 61 62 /* 63 * Cnode lookup stuff. 64 * NOTE: CODA_CACHESIZE must be a power of 2 for cfshash to work! 65 */ 66 #define CODA_CACHESIZE 512 67 68 #define CODA_ALLOC(ptr, cast, size) \ 69 do { \ 70 ptr = (cast)malloc((unsigned long) size, M_CODA, M_WAITOK); \ 71 if (ptr == 0) { \ 72 panic("kernel malloc returns 0 at %s:%d\n", __FILE__, __LINE__); \ 73 } \ 74 } while (/*CONSTCOND*/ 0) 75 76 #define CODA_FREE(ptr, size) free((ptr), M_CODA) 77 78 /* 79 * global cache state control 80 */ 81 extern int coda_nc_use; 82 83 /* 84 * Used to select debugging statements throughout the cfs code. 85 */ 86 extern int codadebug; 87 extern int coda_nc_debug; 88 extern int coda_printf_delay; 89 extern int coda_vnop_print_entry; 90 extern int coda_psdev_print_entry; 91 extern int coda_vfsop_print_entry; 92 93 #define CODADBGMSK(N) (1 << N) 94 #define CODADEBUG(N, STMT) { if (codadebug & CODADBGMSK(N)) { STMT } } 95 #define myprintf(args) \ 96 do { \ 97 if (coda_printf_delay) \ 98 DELAY(coda_printf_delay);\ 99 printf args ; \ 100 } while (/*CONSTCOND*/ 0) 101 102 struct cnode { 103 struct vnode *c_vnode; 104 u_short c_flags; /* flags (see below) */ 105 CodaFid c_fid; /* file handle */ 106 struct vnode *c_ovp; /* open vnode pointer */ 107 u_short c_ocount; /* count of openers */ 108 u_short c_owrite; /* count of open for write */ 109 struct vattr c_vattr; /* attributes */ 110 char *c_symlink; /* pointer to symbolic link */ 111 u_short c_symlen; /* length of symbolic link */ 112 dev_t c_device; /* associated vnode device */ 113 ino_t c_inode; /* associated vnode inode */ 114 struct cnode *c_next; /* links if on NetBSD machine */ 115 }; 116 #define VTOC(vp) ((struct cnode *)(vp)->v_data) 117 #define SET_VTOC(vp) ((vp)->v_data) 118 #define CTOV(cp) ((struct vnode *)((cp)->c_vnode)) 119 120 /* flags */ 121 #define C_VATTR 0x01 /* Validity of vattr in the cnode */ 122 #define C_SYMLINK 0x02 /* Validity of symlink pointer in the Code */ 123 #define C_WANTED 0x08 /* Set if lock wanted */ 124 #define C_LOCKED 0x10 /* Set if lock held */ 125 #define C_UNMOUNTING 0X20 /* Set if unmounting */ 126 #define C_PURGING 0x40 /* Set if purging a fid */ 127 128 #define VALID_VATTR(cp) ((cp->c_flags) & C_VATTR) 129 #define VALID_SYMLINK(cp) ((cp->c_flags) & C_SYMLINK) 130 #define IS_UNMOUNTING(cp) ((cp)->c_flags & C_UNMOUNTING) 131 132 struct vcomm { 133 u_long vc_seq; 134 struct selinfo vc_selproc; 135 struct queue vc_requests; 136 struct queue vc_replys; 137 }; 138 139 #define VC_OPEN(vcp) ((vcp)->vc_requests.forw != NULL) 140 #define MARK_VC_CLOSED(vcp) (vcp)->vc_requests.forw = NULL; 141 #define MARK_VC_OPEN(vcp) /* MT */ 142 143 struct coda_clstat { 144 int ncalls; /* client requests */ 145 int nbadcalls; /* upcall failures */ 146 int reqs[CODA_NCALLS]; /* count of each request */ 147 }; 148 extern struct coda_clstat coda_clstat; 149 150 /* 151 * CODA structure to hold mount/file system information 152 */ 153 struct coda_mntinfo { 154 struct vnode *mi_rootvp; 155 struct mount *mi_vfsp; 156 struct vcomm mi_vcomm; 157 int mi_started; 158 }; 159 extern struct coda_mntinfo coda_mnttbl[]; /* indexed by minor device number */ 160 161 /* 162 * vfs pointer to mount info 163 */ 164 #define vftomi(vfsp) ((struct coda_mntinfo *)(vfsp->mnt_data)) 165 #define CODA_MOUNTED(vfsp) ((vftomi(vfsp) != (struct coda_mntinfo *)0) \ 166 && (vftomi(vfsp)->mi_started)) 167 168 /* 169 * vnode pointer to mount info 170 */ 171 #define vtomi(vp) ((struct coda_mntinfo *)(vp->v_mount->mnt_data)) 172 173 /* 174 * Used for identifying usage of "Control" object 175 */ 176 extern struct vnode *coda_ctlvp; 177 #define IS_CTL_VP(vp) ((vp) == coda_ctlvp) 178 #define IS_CTL_NAME(vp, name, l)((l == CODA_CONTROLLEN) \ 179 && ((vp) == vtomi((vp))->mi_rootvp) \ 180 && strncmp(name, CODA_CONTROL, l) == 0) 181 182 /* 183 * An enum to tell us whether something that will remove a reference 184 * to a cnode was a downcall or not 185 */ 186 enum dc_status { 187 IS_DOWNCALL = 6, 188 NOT_DOWNCALL = 7 189 }; 190 191 /* cfs_psdev.h */ 192 extern int coda_call(struct coda_mntinfo *mntinfo, int inSize, int *outSize, caddr_t buffer); 193 extern int coda_kernel_version; 194 195 /* cfs_subr.h */ 196 extern int handleDownCall(int opcode, union outputArgs *out); 197 extern void coda_unmounting(struct mount *whoIam); 198 extern int coda_vmflush(struct cnode *cp); 199 200 /* cfs_vnodeops.h */ 201 extern struct cnode *make_coda_node(CodaFid *fid, struct mount *vfsp, short type); 202 extern int coda_vnodeopstats_init(void); 203 204 /* coda_vfsops.h */ 205 extern struct mount *devtomp(dev_t dev); 206 207 /* sigh */ 208 #define CODA_RDWR ((u_long) 31) 209 210 #endif /* _CNODE_H_ */ 211 212