1*0Sstevel@tonic-gate /* 2*0Sstevel@tonic-gate * CDDL HEADER START 3*0Sstevel@tonic-gate * 4*0Sstevel@tonic-gate * The contents of this file are subject to the terms of the 5*0Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only 6*0Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance 7*0Sstevel@tonic-gate * with the License. 8*0Sstevel@tonic-gate * 9*0Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10*0Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 11*0Sstevel@tonic-gate * See the License for the specific language governing permissions 12*0Sstevel@tonic-gate * and limitations under the License. 13*0Sstevel@tonic-gate * 14*0Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 15*0Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16*0Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 17*0Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 18*0Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 19*0Sstevel@tonic-gate * 20*0Sstevel@tonic-gate * CDDL HEADER END 21*0Sstevel@tonic-gate */ 22*0Sstevel@tonic-gate /* 23*0Sstevel@tonic-gate * Copyright 1988 Sun Microsystems, Inc. All rights reserved. 24*0Sstevel@tonic-gate * Use is subject to license terms. 25*0Sstevel@tonic-gate */ 26*0Sstevel@tonic-gate 27*0Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" 28*0Sstevel@tonic-gate 29*0Sstevel@tonic-gate /* 30*0Sstevel@tonic-gate * File system identifier. Should be unique (at least per machine). 31*0Sstevel@tonic-gate */ 32*0Sstevel@tonic-gate 33*0Sstevel@tonic-gate #ifndef _sys_vfs_h 34*0Sstevel@tonic-gate #define _sys_vfs_h 35*0Sstevel@tonic-gate 36*0Sstevel@tonic-gate typedef struct { 37*0Sstevel@tonic-gate long val[2]; /* file system id type */ 38*0Sstevel@tonic-gate } fsid_t; 39*0Sstevel@tonic-gate 40*0Sstevel@tonic-gate /* 41*0Sstevel@tonic-gate * File identifier. Should be unique per filesystem on a single machine. 42*0Sstevel@tonic-gate */ 43*0Sstevel@tonic-gate #define MAXFIDSZ 16 44*0Sstevel@tonic-gate #define freefid(fidp) \ 45*0Sstevel@tonic-gate kmem_free((caddr_t)(fidp), sizeof (struct fid) - MAXFIDSZ + (fidp)->fid_len) 46*0Sstevel@tonic-gate 47*0Sstevel@tonic-gate struct fid { 48*0Sstevel@tonic-gate u_short fid_len; /* length of data in bytes */ 49*0Sstevel@tonic-gate char fid_data[MAXFIDSZ]; /* data (variable length) */ 50*0Sstevel@tonic-gate }; 51*0Sstevel@tonic-gate 52*0Sstevel@tonic-gate /* 53*0Sstevel@tonic-gate * Structure per mounted file system. 54*0Sstevel@tonic-gate * Each mounted file system has an array of 55*0Sstevel@tonic-gate * operations and an instance record. 56*0Sstevel@tonic-gate * The file systems are put on a singly linked list. 57*0Sstevel@tonic-gate * If vfs_stats is non-NULL statistics are gathered, see vfs_stat.h 58*0Sstevel@tonic-gate */ 59*0Sstevel@tonic-gate struct vfs { 60*0Sstevel@tonic-gate struct vfs *vfs_next; /* next vfs in vfs list */ 61*0Sstevel@tonic-gate struct vfsops *vfs_op; /* operations on vfs */ 62*0Sstevel@tonic-gate struct vnode *vfs_vnodecovered; /* vnode we mounted on */ 63*0Sstevel@tonic-gate int vfs_flag; /* flags */ 64*0Sstevel@tonic-gate int vfs_bsize; /* native block size */ 65*0Sstevel@tonic-gate fsid_t vfs_fsid; /* file system id */ 66*0Sstevel@tonic-gate caddr_t vfs_stats; /* filesystem statistics */ 67*0Sstevel@tonic-gate caddr_t vfs_data; /* private data */ 68*0Sstevel@tonic-gate }; 69*0Sstevel@tonic-gate 70*0Sstevel@tonic-gate /* 71*0Sstevel@tonic-gate * vfs flags. 72*0Sstevel@tonic-gate * VFS_MLOCK lock the vfs so that name lookup cannot proceed past the vfs. 73*0Sstevel@tonic-gate * This keeps the subtree stable during mounts and unmounts. 74*0Sstevel@tonic-gate */ 75*0Sstevel@tonic-gate #define VFS_RDONLY 0x01 /* read only vfs */ 76*0Sstevel@tonic-gate #define VFS_MLOCK 0x02 /* lock vfs so that subtree is stable */ 77*0Sstevel@tonic-gate #define VFS_MWAIT 0x04 /* someone is waiting for lock */ 78*0Sstevel@tonic-gate #define VFS_NOSUID 0x08 /* turn off set-uid on exec */ 79*0Sstevel@tonic-gate #define VFS_GRPID 0x10 /* Old BSD group-id on create */ 80*0Sstevel@tonic-gate #define VFS_NOSUB 0x20 /* No mounts allowed beneath this fs */ 81*0Sstevel@tonic-gate #define VFS_REMOUNT 0x40 /* modify mount otions only */ 82*0Sstevel@tonic-gate #define VFS_MULTI 0x80 /* Do multi-component lookup on files */ 83*0Sstevel@tonic-gate 84*0Sstevel@tonic-gate /* 85*0Sstevel@tonic-gate * Operations supported on virtual file system. 86*0Sstevel@tonic-gate */ 87*0Sstevel@tonic-gate struct vfsops { 88*0Sstevel@tonic-gate int (*vfs_mount)(); /* mount file system */ 89*0Sstevel@tonic-gate int (*vfs_unmount)(); /* unmount file system */ 90*0Sstevel@tonic-gate int (*vfs_root)(); /* get root vnode */ 91*0Sstevel@tonic-gate int (*vfs_statfs)(); /* get fs statistics */ 92*0Sstevel@tonic-gate int (*vfs_sync)(); /* flush fs buffers */ 93*0Sstevel@tonic-gate int (*vfs_vget)(); /* get vnode from fid */ 94*0Sstevel@tonic-gate int (*vfs_mountroot)(); /* mount the root filesystem */ 95*0Sstevel@tonic-gate int (*vfs_swapvp)(); /* return vnode for swap */ 96*0Sstevel@tonic-gate }; 97*0Sstevel@tonic-gate 98*0Sstevel@tonic-gate #define VFS_MOUNT(VFSP, PATH, DATA) \ 99*0Sstevel@tonic-gate (*(VFSP)->vfs_op->vfs_mount)(VFSP, PATH, DATA) 100*0Sstevel@tonic-gate #define VFS_UNMOUNT(VFSP) (*(VFSP)->vfs_op->vfs_unmount)(VFSP) 101*0Sstevel@tonic-gate #define VFS_ROOT(VFSP, VPP) (*(VFSP)->vfs_op->vfs_root)(VFSP,VPP) 102*0Sstevel@tonic-gate #define VFS_STATFS(VFSP, SBP) (*(VFSP)->vfs_op->vfs_statfs)(VFSP,SBP) 103*0Sstevel@tonic-gate #define VFS_SYNC(VFSP) (*(VFSP)->vfs_op->vfs_sync)(VFSP) 104*0Sstevel@tonic-gate #define VFS_VGET(VFSP, VPP, FIDP) (*(VFSP)->vfs_op->vfs_vget)(VFSP, VPP, FIDP) 105*0Sstevel@tonic-gate #define VFS_MOUNTROOT(VFSP, VPP, NM) \ 106*0Sstevel@tonic-gate (*(VFSP)->vfs_op->vfs_mountroot)(VFSP, VPP, NM) 107*0Sstevel@tonic-gate #define VFS_SWAPVP(VFSP, VPP, NM) (*(VFSP)->vfs_op->vfs_swapvp)(VFSP, VPP, NM) 108*0Sstevel@tonic-gate 109*0Sstevel@tonic-gate /* 110*0Sstevel@tonic-gate * file system statistics 111*0Sstevel@tonic-gate */ 112*0Sstevel@tonic-gate struct statfs { 113*0Sstevel@tonic-gate long f_type; /* type of info, zero for now */ 114*0Sstevel@tonic-gate long f_bsize; /* fundamental file system block size */ 115*0Sstevel@tonic-gate long f_blocks; /* total blocks in file system */ 116*0Sstevel@tonic-gate long f_bfree; /* free block in fs */ 117*0Sstevel@tonic-gate long f_bavail; /* free blocks avail to non-superuser */ 118*0Sstevel@tonic-gate long f_files; /* total file nodes in file system */ 119*0Sstevel@tonic-gate long f_ffree; /* free file nodes in fs */ 120*0Sstevel@tonic-gate fsid_t f_fsid; /* file system id */ 121*0Sstevel@tonic-gate long f_spare[7]; /* spare for later */ 122*0Sstevel@tonic-gate }; 123*0Sstevel@tonic-gate 124*0Sstevel@tonic-gate #ifdef KERNEL 125*0Sstevel@tonic-gate /* 126*0Sstevel@tonic-gate * Filesystem type switch table 127*0Sstevel@tonic-gate */ 128*0Sstevel@tonic-gate struct vfssw { 129*0Sstevel@tonic-gate char *vsw_name; /* type name string */ 130*0Sstevel@tonic-gate struct vfsops *vsw_ops; /* filesystem operations vector */ 131*0Sstevel@tonic-gate }; 132*0Sstevel@tonic-gate 133*0Sstevel@tonic-gate /* 134*0Sstevel@tonic-gate * public operations 135*0Sstevel@tonic-gate */ 136*0Sstevel@tonic-gate extern void vfs_mountroot(); /* mount the root */ 137*0Sstevel@tonic-gate extern int vfs_add(); /* add a new vfs to mounted vfs list */ 138*0Sstevel@tonic-gate extern void vfs_remove(); /* remove a vfs from mounted vfs list */ 139*0Sstevel@tonic-gate extern int vfs_lock(); /* lock a vfs */ 140*0Sstevel@tonic-gate extern void vfs_unlock(); /* unlock a vfs */ 141*0Sstevel@tonic-gate extern struct vfs *getvfs(); /* return vfs given fsid */ 142*0Sstevel@tonic-gate extern struct vfssw *getfstype(); /* find default filesystem type */ 143*0Sstevel@tonic-gate extern int vfs_getmajor(); /* get major device # for an fs type */ 144*0Sstevel@tonic-gate extern void vfs_putmajor(); /* free major device # for an fs type */ 145*0Sstevel@tonic-gate extern int vfs_getnum(); /* get device # for an fs type */ 146*0Sstevel@tonic-gate extern void vfs_putnum(); /* release device # for an fs type */ 147*0Sstevel@tonic-gate 148*0Sstevel@tonic-gate #define VFS_INIT(VFSP, OP, DATA) { \ 149*0Sstevel@tonic-gate (VFSP)->vfs_next = (struct vfs *)0; \ 150*0Sstevel@tonic-gate (VFSP)->vfs_op = (OP); \ 151*0Sstevel@tonic-gate (VFSP)->vfs_flag = 0; \ 152*0Sstevel@tonic-gate (VFSP)->vfs_stats = NULL; \ 153*0Sstevel@tonic-gate (VFSP)->vfs_data = (DATA); \ 154*0Sstevel@tonic-gate } 155*0Sstevel@tonic-gate 156*0Sstevel@tonic-gate /* 157*0Sstevel@tonic-gate * globals 158*0Sstevel@tonic-gate */ 159*0Sstevel@tonic-gate extern struct vfs *rootvfs; /* ptr to root vfs structure */ 160*0Sstevel@tonic-gate extern struct vfssw vfssw[]; /* table of filesystem types */ 161*0Sstevel@tonic-gate extern struct vfssw *vfsNVFS; /* vfs switch table end marker */ 162*0Sstevel@tonic-gate #endif 163*0Sstevel@tonic-gate 164*0Sstevel@tonic-gate #endif /*!_sys_vfs_h*/ 165