155344Spendry /* 263233Sbostic * Copyright (c) 1992, 1993 363233Sbostic * The Regents of the University of California. All rights reserved. 455344Spendry * 555344Spendry * This code is derived from software donated to Berkeley by 655344Spendry * Jan-Simon Pendry. 755344Spendry * 855344Spendry * %sccs.include.redist.c% 955344Spendry * 10*69436Smckusick * @(#)kernfs_vnops.c 8.13 (Berkeley) 05/14/95 1155344Spendry */ 1255344Spendry 1355344Spendry /* 1455344Spendry * Kernel parameter filesystem (/kern) 1555344Spendry */ 1655344Spendry 1755344Spendry #include <sys/param.h> 1855344Spendry #include <sys/systm.h> 1955344Spendry #include <sys/kernel.h> 2055344Spendry #include <sys/vmmeter.h> 2155344Spendry #include <sys/types.h> 2255344Spendry #include <sys/time.h> 2355344Spendry #include <sys/proc.h> 2455344Spendry #include <sys/vnode.h> 2555344Spendry #include <sys/malloc.h> 2655344Spendry #include <sys/file.h> 2755344Spendry #include <sys/stat.h> 2855344Spendry #include <sys/mount.h> 2955344Spendry #include <sys/namei.h> 3055344Spendry #include <sys/buf.h> 3155344Spendry #include <sys/dirent.h> 3255344Spendry #include <miscfs/kernfs/kernfs.h> 3355344Spendry 3455344Spendry #define KSTRING 256 /* Largest I/O available via this filesystem */ 3555344Spendry #define UIO_MX 32 3655344Spendry 3755356Spendry #define READ_MODE (S_IRUSR|S_IRGRP|S_IROTH) 3855356Spendry #define WRITE_MODE (S_IWUSR|S_IRUSR|S_IRGRP|S_IROTH) 3955356Spendry #define DIR_MODE (S_IRUSR|S_IXUSR|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH) 4055356Spendry 4155344Spendry struct kern_target { 4267387Spendry u_char kt_type; 4367387Spendry u_char kt_namlen; 4455344Spendry char *kt_name; 4555344Spendry void *kt_data; 4667387Spendry #define KTT_NULL 1 4767387Spendry #define KTT_TIME 5 4867387Spendry #define KTT_INT 17 4967387Spendry #define KTT_STRING 31 5067387Spendry #define KTT_HOSTNAME 47 5167387Spendry #define KTT_AVENRUN 53 5267387Spendry #define KTT_DEVICE 71 5367387Spendry u_char kt_tag; 5467387Spendry u_char kt_vtype; 5567387Spendry mode_t kt_mode; 5655344Spendry } kern_targets[] = { 5755344Spendry /* NOTE: The name must be less than UIO_MX-16 chars in length */ 5867387Spendry #define N(s) sizeof(s)-1, s 5967387Spendry /* name data tag type ro/rw */ 6067387Spendry { DT_DIR, N("."), 0, KTT_NULL, VDIR, DIR_MODE }, 6167387Spendry { DT_DIR, N(".."), 0, KTT_NULL, VDIR, DIR_MODE }, 6267387Spendry { DT_REG, N("boottime"), &boottime.tv_sec, KTT_INT, VREG, READ_MODE }, 6367387Spendry { DT_REG, N("copyright"), copyright, KTT_STRING, VREG, READ_MODE }, 6467387Spendry { DT_REG, N("hostname"), 0, KTT_HOSTNAME, VREG, WRITE_MODE }, 6567387Spendry { DT_REG, N("hz"), &hz, KTT_INT, VREG, READ_MODE }, 6667387Spendry { DT_REG, N("loadavg"), 0, KTT_AVENRUN, VREG, READ_MODE }, 6767387Spendry { DT_REG, N("pagesize"), &cnt.v_page_size, KTT_INT, VREG, READ_MODE }, 6867387Spendry { DT_REG, N("physmem"), &physmem, KTT_INT, VREG, READ_MODE }, 6959556Spendry #if 0 7067387Spendry { DT_DIR, N("root"), 0, KTT_NULL, VDIR, DIR_MODE }, 7159556Spendry #endif 7267387Spendry { DT_BLK, N("rootdev"), &rootdev, KTT_DEVICE, VBLK, READ_MODE }, 7367387Spendry { DT_CHR, N("rrootdev"), &rrootdev, KTT_DEVICE, VCHR, READ_MODE }, 7467387Spendry { DT_REG, N("time"), 0, KTT_TIME, VREG, READ_MODE }, 7567387Spendry { DT_REG, N("version"), version, KTT_STRING, VREG, READ_MODE }, 7667387Spendry #undef N 7755344Spendry }; 7855344Spendry static int nkern_targets = sizeof(kern_targets) / sizeof(kern_targets[0]); 7955344Spendry 8055344Spendry static int 8155344Spendry kernfs_xread(kt, buf, len, lenp) 8255344Spendry struct kern_target *kt; 8355344Spendry char *buf; 8455344Spendry int len; 8555344Spendry int *lenp; 8655344Spendry { 8767387Spendry 8855344Spendry switch (kt->kt_tag) { 8955344Spendry case KTT_TIME: { 9055344Spendry struct timeval tv; 9155344Spendry microtime(&tv); 9255344Spendry sprintf(buf, "%d %d\n", tv.tv_sec, tv.tv_usec); 9355344Spendry break; 9455344Spendry } 9555344Spendry 9655344Spendry case KTT_INT: { 9755344Spendry int *ip = kt->kt_data; 9855344Spendry sprintf(buf, "%d\n", *ip); 9955344Spendry break; 10055344Spendry } 10155344Spendry 10255344Spendry case KTT_STRING: { 10355344Spendry char *cp = kt->kt_data; 10455344Spendry int xlen = strlen(cp) + 1; 10555344Spendry 10655344Spendry if (xlen >= len) 10755344Spendry return (EINVAL); 10855344Spendry 10955344Spendry bcopy(cp, buf, xlen); 11055344Spendry break; 11155344Spendry } 11255344Spendry 11355344Spendry case KTT_HOSTNAME: { 11455344Spendry char *cp = hostname; 11555344Spendry int xlen = hostnamelen; 11655344Spendry 11759556Spendry if (xlen >= (len-2)) 11855344Spendry return (EINVAL); 11955344Spendry 12059556Spendry bcopy(cp, buf, xlen); 12159556Spendry buf[xlen] = '\n'; 12259556Spendry buf[xlen+1] = '\0'; 12355344Spendry break; 12455344Spendry } 12555344Spendry 12655344Spendry case KTT_AVENRUN: 12755344Spendry sprintf(buf, "%ld %ld %ld %ld\n", 12867387Spendry averunnable.ldavg[0], averunnable.ldavg[1], 12967387Spendry averunnable.ldavg[2], averunnable.fscale); 13055344Spendry break; 13155344Spendry 13255344Spendry default: 13367387Spendry return (EIO); 13455344Spendry } 13555344Spendry 13655344Spendry *lenp = strlen(buf); 13755344Spendry return (0); 13855344Spendry } 13955344Spendry 14055344Spendry static int 14155344Spendry kernfs_xwrite(kt, buf, len) 14255344Spendry struct kern_target *kt; 14355344Spendry char *buf; 14455344Spendry int len; 14555344Spendry { 14667387Spendry 14755344Spendry switch (kt->kt_tag) { 14867387Spendry case KTT_HOSTNAME: 14955344Spendry if (buf[len-1] == '\n') 15055344Spendry --len; 15155344Spendry bcopy(buf, hostname, len); 15259556Spendry hostname[len] = '\0'; 15359556Spendry hostnamelen = len; 15455344Spendry return (0); 15555344Spendry 15655344Spendry default: 15755344Spendry return (EIO); 15855344Spendry } 15955344Spendry } 16055344Spendry 16155344Spendry 16255344Spendry /* 16355344Spendry * vp is the current namei directory 16455344Spendry * ndp is the name to locate in that directory... 16555344Spendry */ 16655344Spendry kernfs_lookup(ap) 16755344Spendry struct vop_lookup_args /* { 16855344Spendry struct vnode * a_dvp; 16955344Spendry struct vnode ** a_vpp; 17055344Spendry struct componentname * a_cnp; 17155344Spendry } */ *ap; 17255344Spendry { 17367387Spendry struct componentname *cnp = ap->a_cnp; 17455344Spendry struct vnode **vpp = ap->a_vpp; 17555344Spendry struct vnode *dvp = ap->a_dvp; 17667387Spendry char *pname = cnp->cn_nameptr; 177*69436Smckusick struct proc *p = cnp->cn_proc; 17867387Spendry struct kern_target *kt; 17965446Sbostic struct vnode *fvp; 18065446Sbostic int error, i; 18155344Spendry 18255344Spendry #ifdef KERNFS_DIAGNOSTIC 18355344Spendry printf("kernfs_lookup(%x)\n", ap); 18455344Spendry printf("kernfs_lookup(dp = %x, vpp = %x, cnp = %x)\n", dvp, vpp, ap->a_cnp); 18555344Spendry printf("kernfs_lookup(%s)\n", pname); 18655344Spendry #endif 18767387Spendry 18869349Smckusick *vpp = NULLVP; 18969349Smckusick 19069349Smckusick if (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME) 19169349Smckusick return (EROFS); 19269349Smckusick 19355344Spendry if (cnp->cn_namelen == 1 && *pname == '.') { 19455344Spendry *vpp = dvp; 19555350Spendry VREF(dvp); 19655344Spendry /*VOP_LOCK(dvp);*/ 19755344Spendry return (0); 19855344Spendry } 19955344Spendry 20059556Spendry #if 0 20155344Spendry if (cnp->cn_namelen == 4 && bcmp(pname, "root", 4) == 0) { 20255344Spendry *vpp = rootdir; 20355344Spendry VREF(rootdir); 204*69436Smckusick vn_lock(rootdir, LK_EXCLUSIVE | LK_RETRY, p) 20555344Spendry return (0); 20655344Spendry } 20759556Spendry #endif 20855350Spendry 20969349Smckusick for (kt = kern_targets, i = 0; i < nkern_targets; kt++, i++) { 21067387Spendry if (cnp->cn_namelen == kt->kt_namlen && 21169349Smckusick bcmp(kt->kt_name, pname, cnp->cn_namelen) == 0) 21269349Smckusick goto found; 21355344Spendry } 21455344Spendry 21555344Spendry #ifdef KERNFS_DIAGNOSTIC 21669349Smckusick printf("kernfs_lookup: i = %d, failed", i); 21755344Spendry #endif 21855344Spendry 21969349Smckusick return (cnp->cn_nameiop == LOOKUP ? ENOENT : EROFS); 22055344Spendry 22169349Smckusick found: 22267387Spendry if (kt->kt_tag == KTT_DEVICE) { 22367387Spendry dev_t *dp = kt->kt_data; 22467387Spendry loop: 22567387Spendry if (*dp == NODEV || !vfinddev(*dp, kt->kt_vtype, &fvp)) 22667387Spendry return (ENOENT); 22767387Spendry *vpp = fvp; 228*69436Smckusick if (vget(fvp, LK_EXCLUSIVE, p)) 22967387Spendry goto loop; 23067387Spendry return (0); 23167387Spendry } 23267387Spendry 23355344Spendry #ifdef KERNFS_DIAGNOSTIC 23455344Spendry printf("kernfs_lookup: allocate new vnode\n"); 23555344Spendry #endif 23667387Spendry if (error = getnewvnode(VT_KERNFS, dvp->v_mount, kernfs_vnodeop_p, 23767387Spendry &fvp)) 23867387Spendry return (error); 23967387Spendry 24067387Spendry MALLOC(fvp->v_data, void *, sizeof(struct kernfs_node), M_TEMP, 24167387Spendry M_WAITOK); 24267387Spendry VTOKERN(fvp)->kf_kt = kt; 24367387Spendry fvp->v_type = kt->kt_vtype; 24455344Spendry *vpp = fvp; 24567387Spendry 24655344Spendry #ifdef KERNFS_DIAGNOSTIC 24755344Spendry printf("kernfs_lookup: newvp = %x\n", fvp); 24855344Spendry #endif 24955344Spendry return (0); 25055344Spendry } 25155344Spendry 25255344Spendry kernfs_open(ap) 25355344Spendry struct vop_open_args /* { 25455344Spendry struct vnode *a_vp; 25555344Spendry int a_mode; 25655344Spendry struct ucred *a_cred; 25755344Spendry struct proc *a_p; 25855344Spendry } */ *ap; 25955344Spendry { 26055344Spendry 26167387Spendry /* Only need to check access permissions. */ 26255344Spendry return (0); 26355344Spendry } 26455344Spendry 26555344Spendry static int 26655344Spendry kernfs_access(ap) 26755344Spendry struct vop_access_args /* { 26855344Spendry struct vnode *a_vp; 26955344Spendry int a_mode; 27055344Spendry struct ucred *a_cred; 27155344Spendry struct proc *a_p; 27255344Spendry } */ *ap; 27355344Spendry { 27467387Spendry register struct vnode *vp = ap->a_vp; 27567387Spendry register struct ucred *cred = ap->a_cred; 27667387Spendry mode_t amode = ap->a_mode; 27767387Spendry mode_t fmode = 27867387Spendry (vp->v_flag & VROOT) ? DIR_MODE : VTOKERN(vp)->kf_kt->kt_mode; 27967387Spendry mode_t mask = 0; 28067387Spendry register gid_t *gp; 28167387Spendry int i; 28255344Spendry 28367387Spendry /* Some files are simply not modifiable. */ 28467387Spendry if ((amode & VWRITE) && (fmode & (S_IWUSR|S_IWGRP|S_IWOTH)) == 0) 28567387Spendry return (EPERM); 28655344Spendry 28767387Spendry /* Root can do anything else. */ 28867387Spendry if (cred->cr_uid == 0) 28967387Spendry return (0); 29056497Smckusick 29167387Spendry /* Check for group 0 (wheel) permissions. */ 29267387Spendry for (i = 0, gp = cred->cr_groups; i < cred->cr_ngroups; i++, gp++) 29367387Spendry if (*gp == 0) { 29467387Spendry if (amode & VEXEC) 29567387Spendry mask |= S_IXGRP; 29667387Spendry if (amode & VREAD) 29767387Spendry mask |= S_IRGRP; 29867387Spendry if (amode & VWRITE) 29967387Spendry mask |= S_IWGRP; 30067387Spendry return ((fmode & mask) == mask ? 0 : EACCES); 30156497Smckusick } 30255344Spendry 30367387Spendry /* Otherwise, check everyone else. */ 30467387Spendry if (amode & VEXEC) 30567387Spendry mask |= S_IXOTH; 30667387Spendry if (amode & VREAD) 30767387Spendry mask |= S_IROTH; 30867387Spendry if (amode & VWRITE) 30967387Spendry mask |= S_IWOTH; 31067387Spendry return ((fmode & mask) == mask ? 0 : EACCES); 31155344Spendry } 31255344Spendry 31355344Spendry kernfs_getattr(ap) 31455344Spendry struct vop_getattr_args /* { 31555344Spendry struct vnode *a_vp; 31655344Spendry struct vattr *a_vap; 31755344Spendry struct ucred *a_cred; 31855344Spendry struct proc *a_p; 31955344Spendry } */ *ap; 32055344Spendry { 32155344Spendry struct vnode *vp = ap->a_vp; 32255344Spendry struct vattr *vap = ap->a_vap; 32368173Scgd struct timeval tv; 32455344Spendry int error = 0; 32555344Spendry char strbuf[KSTRING]; 32655344Spendry 32755344Spendry bzero((caddr_t) vap, sizeof(*vap)); 32855344Spendry vattr_null(vap); 32955344Spendry vap->va_uid = 0; 33055344Spendry vap->va_gid = 0; 33155344Spendry vap->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0]; 33267387Spendry vap->va_size = 0; 33355344Spendry vap->va_blocksize = DEV_BSIZE; 33468173Scgd microtime(&tv); 33568173Scgd TIMEVAL_TO_TIMESPEC(&tv, &vap->va_atime); 33655344Spendry vap->va_mtime = vap->va_atime; 33755344Spendry vap->va_ctime = vap->va_ctime; 33855344Spendry vap->va_gen = 0; 33955344Spendry vap->va_flags = 0; 34055344Spendry vap->va_rdev = 0; 34155344Spendry vap->va_bytes = 0; 34255344Spendry 34355344Spendry if (vp->v_flag & VROOT) { 34455344Spendry #ifdef KERNFS_DIAGNOSTIC 34555344Spendry printf("kernfs_getattr: stat rootdir\n"); 34655344Spendry #endif 34755344Spendry vap->va_type = VDIR; 34855356Spendry vap->va_mode = DIR_MODE; 34955344Spendry vap->va_nlink = 2; 35055344Spendry vap->va_fileid = 2; 35155344Spendry vap->va_size = DEV_BSIZE; 35255344Spendry } else { 35356497Smckusick struct kern_target *kt = VTOKERN(vp)->kf_kt; 35455344Spendry int nbytes; 35555344Spendry #ifdef KERNFS_DIAGNOSTIC 35655344Spendry printf("kernfs_getattr: stat target %s\n", kt->kt_name); 35755344Spendry #endif 35855344Spendry vap->va_type = kt->kt_vtype; 35967387Spendry vap->va_mode = kt->kt_mode; 36055344Spendry vap->va_nlink = 1; 36167387Spendry vap->va_fileid = 1 + (kt - kern_targets) / sizeof(*kt); 36255344Spendry error = kernfs_xread(kt, strbuf, sizeof(strbuf), &nbytes); 36355344Spendry vap->va_size = nbytes; 36455344Spendry } 36555344Spendry 36655344Spendry #ifdef KERNFS_DIAGNOSTIC 36755344Spendry printf("kernfs_getattr: return error %d\n", error); 36855344Spendry #endif 36955344Spendry return (error); 37055344Spendry } 37155344Spendry 37255344Spendry kernfs_setattr(ap) 37355344Spendry struct vop_setattr_args /* { 37455344Spendry struct vnode *a_vp; 37555344Spendry struct vattr *a_vap; 37655344Spendry struct ucred *a_cred; 37755344Spendry struct proc *a_p; 37855344Spendry } */ *ap; 37955344Spendry { 38055344Spendry 38155344Spendry /* 38255344Spendry * Silently ignore attribute changes. 38355344Spendry * This allows for open with truncate to have no 38455344Spendry * effect until some data is written. I want to 38555344Spendry * do it this way because all writes are atomic. 38655344Spendry */ 38755344Spendry return (0); 38855344Spendry } 38955344Spendry 39055344Spendry static int 39155344Spendry kernfs_read(ap) 39255344Spendry struct vop_read_args /* { 39355344Spendry struct vnode *a_vp; 39455344Spendry struct uio *a_uio; 39555344Spendry int a_ioflag; 39655344Spendry struct ucred *a_cred; 39755344Spendry } */ *ap; 39855344Spendry { 39955344Spendry struct vnode *vp = ap->a_vp; 40055344Spendry struct uio *uio = ap->a_uio; 40156497Smckusick struct kern_target *kt; 40255344Spendry char strbuf[KSTRING]; 40355344Spendry int off = uio->uio_offset; 40465446Sbostic int error, len; 40565446Sbostic char *cp; 40656497Smckusick 40767387Spendry if (vp->v_type == VDIR) 40866052Spendry return (EOPNOTSUPP); 40956497Smckusick 41056497Smckusick kt = VTOKERN(vp)->kf_kt; 41156497Smckusick 41255344Spendry #ifdef KERNFS_DIAGNOSTIC 41355344Spendry printf("kern_read %s\n", kt->kt_name); 41455344Spendry #endif 41555344Spendry 41665446Sbostic len = 0; 41767387Spendry if (error = kernfs_xread(kt, strbuf, sizeof(strbuf), &len)) 41855344Spendry return (error); 41967387Spendry if (len <= off) 42067387Spendry return (0); 42167387Spendry return (uiomove(&strbuf[off], len - off, uio)); 42255344Spendry } 42355344Spendry 42455344Spendry static int 42555344Spendry kernfs_write(ap) 42655344Spendry struct vop_write_args /* { 42755344Spendry struct vnode *a_vp; 42855344Spendry struct uio *a_uio; 42955344Spendry int a_ioflag; 43055344Spendry struct ucred *a_cred; 43155344Spendry } */ *ap; 43255344Spendry { 43355344Spendry struct vnode *vp = ap->a_vp; 43455344Spendry struct uio *uio = ap->a_uio; 43556497Smckusick struct kern_target *kt; 43665446Sbostic int error, xlen; 43755344Spendry char strbuf[KSTRING]; 43855344Spendry 43967387Spendry if (vp->v_type == VDIR) 44067387Spendry return (EOPNOTSUPP); 44156497Smckusick 44256497Smckusick kt = VTOKERN(vp)->kf_kt; 44356497Smckusick 44455344Spendry if (uio->uio_offset != 0) 44555344Spendry return (EINVAL); 44655344Spendry 44755344Spendry xlen = min(uio->uio_resid, KSTRING-1); 44867387Spendry if (error = uiomove(strbuf, xlen, uio)) 44955344Spendry return (error); 45055344Spendry 45155344Spendry if (uio->uio_resid != 0) 45255344Spendry return (EIO); 45355344Spendry 45455344Spendry strbuf[xlen] = '\0'; 45559556Spendry xlen = strlen(strbuf); 45655344Spendry return (kernfs_xwrite(kt, strbuf, xlen)); 45755344Spendry } 45855344Spendry 45955344Spendry kernfs_readdir(ap) 46055344Spendry struct vop_readdir_args /* { 46155344Spendry struct vnode *a_vp; 46255344Spendry struct uio *a_uio; 46355344Spendry struct ucred *a_cred; 46467365Smckusick int *a_eofflag; 46567365Smckusick u_long *a_cookies; 46667365Smckusick int a_ncookies; 46755344Spendry } */ *ap; 46855344Spendry { 46967387Spendry int error, i; 47055344Spendry struct uio *uio = ap->a_uio; 47167387Spendry struct kern_target *kt; 47267387Spendry struct dirent d; 47355344Spendry 47467387Spendry if (ap->a_vp->v_type != VDIR) 47567387Spendry return (ENOTDIR); 47667387Spendry 47767365Smckusick /* 47867365Smckusick * We don't allow exporting kernfs mounts, and currently local 47967365Smckusick * requests do not need cookies. 48067365Smckusick */ 48167387Spendry if (ap->a_ncookies != NULL) 48267365Smckusick panic("kernfs_readdir: not hungry"); 48367365Smckusick 48455344Spendry i = uio->uio_offset / UIO_MX; 48555344Spendry error = 0; 48667387Spendry for (kt = &kern_targets[i]; 48767387Spendry uio->uio_resid >= UIO_MX && i < nkern_targets; kt++, i++) { 48855344Spendry struct dirent *dp = &d; 48955344Spendry #ifdef KERNFS_DIAGNOSTIC 49055344Spendry printf("kernfs_readdir: i = %d\n", i); 49155344Spendry #endif 49255344Spendry 49367387Spendry if (kt->kt_tag == KTT_DEVICE) { 49467387Spendry dev_t *dp = kt->kt_data; 49567387Spendry struct vnode *fvp; 49655344Spendry 49767387Spendry if (*dp == NODEV || !vfinddev(*dp, kt->kt_vtype, &fvp)) 49867387Spendry continue; 49967387Spendry } 50055344Spendry 50167387Spendry bzero((caddr_t)dp, UIO_MX); 50267387Spendry dp->d_namlen = kt->kt_namlen; 50367387Spendry bcopy(kt->kt_name, dp->d_name, kt->kt_namlen+1); 50467387Spendry 50555344Spendry #ifdef KERNFS_DIAGNOSTIC 50655344Spendry printf("kernfs_readdir: name = %s, len = %d\n", 50755344Spendry dp->d_name, dp->d_namlen); 50855344Spendry #endif 50955344Spendry /* 51055344Spendry * Fill in the remaining fields 51155344Spendry */ 51255344Spendry dp->d_reclen = UIO_MX; 51355344Spendry dp->d_fileno = i + 3; 51467387Spendry dp->d_type = kt->kt_type; 51555344Spendry /* 51655344Spendry * And ship to userland 51755344Spendry */ 51867387Spendry if (error = uiomove((caddr_t)dp, UIO_MX, uio)) 51955344Spendry break; 52055344Spendry } 52155344Spendry 52255344Spendry uio->uio_offset = i * UIO_MX; 52355344Spendry 52455344Spendry return (error); 52555344Spendry } 52655344Spendry 52755344Spendry kernfs_inactive(ap) 52855344Spendry struct vop_inactive_args /* { 52955344Spendry struct vnode *a_vp; 53055344Spendry } */ *ap; 53155344Spendry { 53255344Spendry struct vnode *vp = ap->a_vp; 53355344Spendry 53467387Spendry #ifdef KERNFS_DIAGNOSTIC 53567387Spendry printf("kernfs_inactive(%x)\n", vp); 53667387Spendry #endif 53755344Spendry /* 53855344Spendry * Clear out the v_type field to avoid 53955344Spendry * nasty things happening in vgone(). 54055344Spendry */ 54155344Spendry vp->v_type = VNON; 54255344Spendry return (0); 54355344Spendry } 54455344Spendry 54555344Spendry kernfs_reclaim(ap) 54655344Spendry struct vop_reclaim_args /* { 54755344Spendry struct vnode *a_vp; 54855344Spendry } */ *ap; 54955344Spendry { 55055344Spendry struct vnode *vp = ap->a_vp; 55167387Spendry 55260618Smckusick #ifdef KERNFS_DIAGNOSTIC 55355344Spendry printf("kernfs_reclaim(%x)\n", vp); 55460618Smckusick #endif 55555344Spendry if (vp->v_data) { 55655344Spendry FREE(vp->v_data, M_TEMP); 55755344Spendry vp->v_data = 0; 55855344Spendry } 55955344Spendry return (0); 56055344Spendry } 56155344Spendry 56255344Spendry /* 56365742Spendry * Return POSIX pathconf information applicable to special devices. 56465742Spendry */ 56565742Spendry kernfs_pathconf(ap) 56665742Spendry struct vop_pathconf_args /* { 56765742Spendry struct vnode *a_vp; 56865742Spendry int a_name; 56965742Spendry int *a_retval; 57065742Spendry } */ *ap; 57165742Spendry { 57265742Spendry 57365742Spendry switch (ap->a_name) { 57465742Spendry case _PC_LINK_MAX: 57565742Spendry *ap->a_retval = LINK_MAX; 57665742Spendry return (0); 57765742Spendry case _PC_MAX_CANON: 57865742Spendry *ap->a_retval = MAX_CANON; 57965742Spendry return (0); 58065742Spendry case _PC_MAX_INPUT: 58165742Spendry *ap->a_retval = MAX_INPUT; 58265742Spendry return (0); 58365742Spendry case _PC_PIPE_BUF: 58465742Spendry *ap->a_retval = PIPE_BUF; 58565742Spendry return (0); 58665742Spendry case _PC_CHOWN_RESTRICTED: 58765742Spendry *ap->a_retval = 1; 58865742Spendry return (0); 58965742Spendry case _PC_VDISABLE: 59065742Spendry *ap->a_retval = _POSIX_VDISABLE; 59165742Spendry return (0); 59265742Spendry default: 59365742Spendry return (EINVAL); 59465742Spendry } 59565742Spendry /* NOTREACHED */ 59665742Spendry } 59765742Spendry 59865742Spendry /* 59955344Spendry * Print out the contents of a /dev/fd vnode. 60055344Spendry */ 60155344Spendry /* ARGSUSED */ 60255344Spendry kernfs_print(ap) 60355344Spendry struct vop_print_args /* { 60455344Spendry struct vnode *a_vp; 60555344Spendry } */ *ap; 60655344Spendry { 60755344Spendry 60865380Spendry printf("tag VT_KERNFS, kernfs vnode\n"); 60955344Spendry return (0); 61055344Spendry } 61155344Spendry 61255344Spendry /*void*/ 61355344Spendry kernfs_vfree(ap) 61455344Spendry struct vop_vfree_args /* { 61555344Spendry struct vnode *a_pvp; 61655344Spendry ino_t a_ino; 61755344Spendry int a_mode; 61855344Spendry } */ *ap; 61955344Spendry { 62055344Spendry 62155344Spendry return (0); 62255344Spendry } 62355344Spendry 62455344Spendry /* 62555344Spendry * /dev/fd "should never get here" operation 62655344Spendry */ 62755344Spendry kernfs_badop() 62855344Spendry { 62955344Spendry 63055344Spendry panic("kernfs: bad op"); 63155344Spendry /* NOTREACHED */ 63255344Spendry } 63355344Spendry 63455344Spendry /* 63555350Spendry * kernfs vnode null operation 63655344Spendry */ 63755344Spendry kernfs_nullop() 63855344Spendry { 63955344Spendry 64055344Spendry return (0); 64155344Spendry } 64255344Spendry 64368730Smckusick #define kernfs_create ((int (*) __P((struct vop_create_args *)))eopnotsupp) 64468730Smckusick #define kernfs_mknod ((int (*) __P((struct vop_mknod_args *)))eopnotsupp) 64555344Spendry #define kernfs_close ((int (*) __P((struct vop_close_args *)))nullop) 64668730Smckusick #define kernfs_ioctl ((int (*) __P((struct vop_ioctl_args *)))eopnotsupp) 64768730Smckusick #define kernfs_select ((int (*) __P((struct vop_select_args *)))eopnotsupp) 64868730Smckusick #define kernfs_revoke vop_revoke 64968730Smckusick #define kernfs_mmap ((int (*) __P((struct vop_mmap_args *)))eopnotsupp) 65055344Spendry #define kernfs_fsync ((int (*) __P((struct vop_fsync_args *)))nullop) 65155344Spendry #define kernfs_seek ((int (*) __P((struct vop_seek_args *)))nullop) 65268730Smckusick #define kernfs_remove ((int (*) __P((struct vop_remove_args *)))eopnotsupp) 65368730Smckusick #define kernfs_link ((int (*) __P((struct vop_link_args *)))eopnotsupp) 65468730Smckusick #define kernfs_rename ((int (*) __P((struct vop_rename_args *)))eopnotsupp) 65568730Smckusick #define kernfs_mkdir ((int (*) __P((struct vop_mkdir_args *)))eopnotsupp) 65668730Smckusick #define kernfs_rmdir ((int (*) __P((struct vop_rmdir_args *)))eopnotsupp) 65768730Smckusick #define kernfs_symlink ((int (*) __P((struct vop_symlink_args *)))eopnotsupp) 65868730Smckusick #define kernfs_readlink ((int (*) __P((struct vop_readlink_args *)))eopnotsupp) 65955344Spendry #define kernfs_abortop ((int (*) __P((struct vop_abortop_args *)))nullop) 660*69436Smckusick #define kernfs_lock ((int (*) __P((struct vop_lock_args *)))vop_nolock) 661*69436Smckusick #define kernfs_unlock ((int (*) __P((struct vop_unlock_args *)))vop_nounlock) 66255344Spendry #define kernfs_bmap ((int (*) __P((struct vop_bmap_args *)))kernfs_badop) 66368730Smckusick #define kernfs_strategy \ 66468730Smckusick ((int (*) __P((struct vop_strategy_args *)))kernfs_badop) 665*69436Smckusick #define kernfs_islocked \ 666*69436Smckusick ((int (*) __P((struct vop_islocked_args *)))vop_noislocked) 66768730Smckusick #define kernfs_advlock ((int (*) __P((struct vop_advlock_args *)))eopnotsupp) 66868730Smckusick #define kernfs_blkatoff ((int (*) __P((struct vop_blkatoff_args *)))eopnotsupp) 66955344Spendry #define kernfs_valloc ((int(*) __P(( \ 67055344Spendry struct vnode *pvp, \ 67155344Spendry int mode, \ 67255344Spendry struct ucred *cred, \ 67368730Smckusick struct vnode **vpp))) eopnotsupp) 67468730Smckusick #define kernfs_truncate ((int (*) __P((struct vop_truncate_args *)))eopnotsupp) 67568730Smckusick #define kernfs_update ((int (*) __P((struct vop_update_args *)))eopnotsupp) 67668730Smckusick #define kernfs_bwrite ((int (*) __P((struct vop_bwrite_args *)))eopnotsupp) 67755344Spendry 67855344Spendry int (**kernfs_vnodeop_p)(); 67955344Spendry struct vnodeopv_entry_desc kernfs_vnodeop_entries[] = { 68055344Spendry { &vop_default_desc, vn_default_error }, 68155344Spendry { &vop_lookup_desc, kernfs_lookup }, /* lookup */ 68255344Spendry { &vop_create_desc, kernfs_create }, /* create */ 68355344Spendry { &vop_mknod_desc, kernfs_mknod }, /* mknod */ 68465742Spendry { &vop_open_desc, kernfs_open }, /* open */ 68555344Spendry { &vop_close_desc, kernfs_close }, /* close */ 68655344Spendry { &vop_access_desc, kernfs_access }, /* access */ 68755344Spendry { &vop_getattr_desc, kernfs_getattr }, /* getattr */ 68855344Spendry { &vop_setattr_desc, kernfs_setattr }, /* setattr */ 68965742Spendry { &vop_read_desc, kernfs_read }, /* read */ 69055344Spendry { &vop_write_desc, kernfs_write }, /* write */ 69155344Spendry { &vop_ioctl_desc, kernfs_ioctl }, /* ioctl */ 69255344Spendry { &vop_select_desc, kernfs_select }, /* select */ 69368730Smckusick { &vop_revoke_desc, kernfs_revoke }, /* revoke */ 69465742Spendry { &vop_mmap_desc, kernfs_mmap }, /* mmap */ 69555344Spendry { &vop_fsync_desc, kernfs_fsync }, /* fsync */ 69665742Spendry { &vop_seek_desc, kernfs_seek }, /* seek */ 69755344Spendry { &vop_remove_desc, kernfs_remove }, /* remove */ 69865742Spendry { &vop_link_desc, kernfs_link }, /* link */ 69955344Spendry { &vop_rename_desc, kernfs_rename }, /* rename */ 70055344Spendry { &vop_mkdir_desc, kernfs_mkdir }, /* mkdir */ 70155344Spendry { &vop_rmdir_desc, kernfs_rmdir }, /* rmdir */ 70255344Spendry { &vop_symlink_desc, kernfs_symlink }, /* symlink */ 70355344Spendry { &vop_readdir_desc, kernfs_readdir }, /* readdir */ 70465742Spendry { &vop_readlink_desc, kernfs_readlink },/* readlink */ 70555344Spendry { &vop_abortop_desc, kernfs_abortop }, /* abortop */ 70665742Spendry { &vop_inactive_desc, kernfs_inactive },/* inactive */ 70755344Spendry { &vop_reclaim_desc, kernfs_reclaim }, /* reclaim */ 70865742Spendry { &vop_lock_desc, kernfs_lock }, /* lock */ 70955344Spendry { &vop_unlock_desc, kernfs_unlock }, /* unlock */ 71065742Spendry { &vop_bmap_desc, kernfs_bmap }, /* bmap */ 71165742Spendry { &vop_strategy_desc, kernfs_strategy },/* strategy */ 71255344Spendry { &vop_print_desc, kernfs_print }, /* print */ 71365742Spendry { &vop_islocked_desc, kernfs_islocked },/* islocked */ 71465742Spendry { &vop_pathconf_desc, kernfs_pathconf },/* pathconf */ 71555344Spendry { &vop_advlock_desc, kernfs_advlock }, /* advlock */ 71665742Spendry { &vop_blkatoff_desc, kernfs_blkatoff },/* blkatoff */ 71755344Spendry { &vop_valloc_desc, kernfs_valloc }, /* valloc */ 71855344Spendry { &vop_vfree_desc, kernfs_vfree }, /* vfree */ 71965742Spendry { &vop_truncate_desc, kernfs_truncate },/* truncate */ 72055344Spendry { &vop_update_desc, kernfs_update }, /* update */ 72155344Spendry { &vop_bwrite_desc, kernfs_bwrite }, /* bwrite */ 72255344Spendry { (struct vnodeop_desc*)NULL, (int(*)())NULL } 72355344Spendry }; 72455344Spendry struct vnodeopv_desc kernfs_vnodeop_opv_desc = 72555344Spendry { &kernfs_vnodeop_p, kernfs_vnodeop_entries }; 726