Aren
/
NetBSD
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
NetBSD/sys/adosfs/advnops.c

959 lines
21 KiB
C
Raw Blame History

/* $NetBSD: advnops.c,v 1.61 2001/09/15 20:36:32 chs Exp $ */
/*
* Copyright (c) 1994 Christian E. Hopps
* Copyright (c) 1996 Matthias Scheler
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Christian E. Hopps.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#if defined(_KERNEL_OPT)
#include "opt_quota.h"
#endif
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/vnode.h>
#include <sys/mount.h>
#include <sys/time.h>
#include <sys/queue.h>
#include <sys/namei.h>
#include <sys/buf.h>
#include <sys/dirent.h>
#include <sys/malloc.h>
#include <sys/pool.h>
#include <sys/stat.h>
#include <sys/unistd.h>
#include <sys/proc.h>
#include <miscfs/genfs/genfs.h>
#include <miscfs/specfs/specdev.h>
#include <adosfs/adosfs.h>
extern struct vnodeops adosfs_vnodeops;
#define adosfs_open genfs_nullop
int adosfs_getattr __P((void *));
int adosfs_read __P((void *));
int adosfs_write __P((void *));
#define adosfs_fcntl genfs_fcntl
#define adosfs_ioctl genfs_enoioctl
#define adosfs_poll genfs_poll
int adosfs_strategy __P((void *));
int adosfs_link __P((void *));
int adosfs_symlink __P((void *));
#define adosfs_abortop genfs_abortop
int adosfs_bmap __P((void *));
int adosfs_print __P((void *));
int adosfs_readdir __P((void *));
int adosfs_access __P((void *));
int adosfs_readlink __P((void *));
int adosfs_inactive __P((void *));
int adosfs_reclaim __P((void *));
int adosfs_pathconf __P((void *));
#define adosfs_close genfs_nullop
#define adosfs_fsync genfs_nullop
#define adosfs_lease_check genfs_lease_check
#define adosfs_seek genfs_seek
#define adosfs_vfree genfs_nullop
#define adosfs_advlock genfs_einval
#define adosfs_blkatoff genfs_eopnotsupp
#define adosfs_bwrite genfs_eopnotsupp
#define adosfs_create genfs_eopnotsupp
#define adosfs_mkdir genfs_eopnotsupp
#define adosfs_mknod genfs_eopnotsupp
#define adosfs_revoke genfs_revoke
#define adosfs_mmap genfs_mmap
#define adosfs_remove genfs_eopnotsupp
#define adosfs_rename genfs_eopnotsupp
#define adosfs_rmdir genfs_eopnotsupp
#define adosfs_setattr genfs_eopnotsupp
#define adosfs_truncate genfs_eopnotsupp
#define adosfs_update genfs_nullop
#define adosfs_valloc genfs_eopnotsupp
const struct vnodeopv_entry_desc adosfs_vnodeop_entries[] = {
{ &vop_default_desc, vn_default_error },
{ &vop_lookup_desc, adosfs_lookup }, /* lookup */
{ &vop_create_desc, adosfs_create }, /* create */
{ &vop_mknod_desc, adosfs_mknod }, /* mknod */
{ &vop_open_desc, adosfs_open }, /* open */
{ &vop_close_desc, adosfs_close }, /* close */
{ &vop_access_desc, adosfs_access }, /* access */
{ &vop_getattr_desc, adosfs_getattr }, /* getattr */
{ &vop_setattr_desc, adosfs_setattr }, /* setattr */
{ &vop_read_desc, adosfs_read }, /* read */
{ &vop_write_desc, adosfs_write }, /* write */
{ &vop_lease_desc, adosfs_lease_check }, /* lease */
{ &vop_fcntl_desc, adosfs_fcntl }, /* fcntl */
{ &vop_ioctl_desc, adosfs_ioctl }, /* ioctl */
{ &vop_poll_desc, adosfs_poll }, /* poll */
{ &vop_revoke_desc, adosfs_revoke }, /* revoke */
{ &vop_mmap_desc, adosfs_mmap }, /* mmap */
{ &vop_fsync_desc, adosfs_fsync }, /* fsync */
{ &vop_seek_desc, adosfs_seek }, /* seek */
{ &vop_remove_desc, adosfs_remove }, /* remove */
{ &vop_link_desc, adosfs_link }, /* link */
{ &vop_rename_desc, adosfs_rename }, /* rename */
{ &vop_mkdir_desc, adosfs_mkdir }, /* mkdir */
{ &vop_rmdir_desc, adosfs_rmdir }, /* rmdir */
{ &vop_symlink_desc, adosfs_symlink }, /* symlink */
{ &vop_readdir_desc, adosfs_readdir }, /* readdir */
{ &vop_readlink_desc, adosfs_readlink }, /* readlink */
{ &vop_abortop_desc, adosfs_abortop }, /* abortop */
{ &vop_inactive_desc, adosfs_inactive }, /* inactive */
{ &vop_reclaim_desc, adosfs_reclaim }, /* reclaim */
{ &vop_lock_desc, genfs_lock }, /* lock */
{ &vop_unlock_desc, genfs_unlock }, /* unlock */
{ &vop_bmap_desc, adosfs_bmap }, /* bmap */
{ &vop_strategy_desc, adosfs_strategy }, /* strategy */
{ &vop_print_desc, adosfs_print }, /* print */
{ &vop_islocked_desc, genfs_islocked }, /* islocked */
{ &vop_pathconf_desc, adosfs_pathconf }, /* pathconf */
{ &vop_advlock_desc, adosfs_advlock }, /* advlock */
{ &vop_blkatoff_desc, adosfs_blkatoff }, /* blkatoff */
{ &vop_valloc_desc, adosfs_valloc }, /* valloc */
{ &vop_vfree_desc, adosfs_vfree }, /* vfree */
{ &vop_truncate_desc, adosfs_truncate }, /* truncate */
{ &vop_update_desc, adosfs_update }, /* update */
{ &vop_bwrite_desc, adosfs_bwrite }, /* bwrite */
{ &vop_getpages_desc, genfs_getpages }, /* getpages */
{ &vop_putpages_desc, genfs_putpages }, /* putpages */
{ NULL, NULL }
};
const struct vnodeopv_desc adosfs_vnodeop_opv_desc =
{ &adosfs_vnodeop_p, adosfs_vnodeop_entries };
int
adosfs_getattr(v)
void *v;
{
struct vop_getattr_args /* {
struct vnode *a_vp;
struct vattr *a_vap;
struct ucred *a_cred;
struct proc *a_p;
} */ *sp = v;
struct vattr *vap;
struct adosfsmount *amp;
struct anode *ap;
u_long fblks;
#ifdef ADOSFS_DIAGNOSTIC
advopprint(sp);
#endif
vap = sp->a_vap;
ap = VTOA(sp->a_vp);
amp = ap->amp;
vattr_null(vap);
vap->va_uid = ap->uid;
vap->va_gid = ap->gid;
vap->va_fsid = sp->a_vp->v_mount->mnt_stat.f_fsid.val[0];
vap->va_atime.tv_sec = vap->va_mtime.tv_sec = vap->va_ctime.tv_sec =
ap->mtime.days * 24 * 60 * 60 + ap->mtime.mins * 60 +
ap->mtime.ticks / 50 + (8 * 365 + 2) * 24 * 60 * 60;
vap->va_atime.tv_nsec = vap->va_mtime.tv_nsec = vap->va_ctime.tv_nsec = 0;
vap->va_gen = 0;
vap->va_flags = 0;
vap->va_rdev = NODEV;
vap->va_fileid = ap->block;
vap->va_type = sp->a_vp->v_type;
vap->va_mode = adunixprot(ap->adprot) & amp->mask;
if (sp->a_vp->v_type == VDIR) {
vap->va_nlink = 1; /* XXX bogus, oh well */
vap->va_bytes = amp->bsize;
vap->va_size = amp->bsize;
} else {
/*
* XXX actually we can track this if we were to walk the list
* of links if it exists.
* XXX for now, just set nlink to 2 if this is a hard link
* to a file, or a file with a hard link.
*/
vap->va_nlink = 1 + (ap->linkto != 0);
/*
* round up to nearest blocks add number of file list
* blocks needed and mutiply by number of bytes per block.
*/
fblks = howmany(ap->fsize, amp->dbsize);
fblks += howmany(fblks, ANODENDATBLKENT(ap));
vap->va_bytes = fblks * amp->dbsize;
vap->va_size = ap->fsize;
vap->va_blocksize = amp->dbsize;
}
#ifdef ADOSFS_DIAGNOSTIC
printf(" 0)");
#endif
return(0);
}
/*
* are things locked??? they need to be to avoid this being
* deleted or changed (data block pointer blocks moving about.)
*/
int
adosfs_read(v)
void *v;
{
struct vop_read_args /* {
struct vnode *a_vp;
struct uio *a_uio;
int a_ioflag;
struct ucred *a_cred;
} */ *sp = v;
struct vnode *vp = sp->a_vp;
struct adosfsmount *amp;
struct anode *ap;
struct uio *uio;
struct buf *bp;
daddr_t lbn;
int size, diff, error;
long n, on;
#ifdef ADOSFS_DIAGNOSTIC
advopprint(sp);
#endif
error = 0;
uio = sp->a_uio;
ap = VTOA(sp->a_vp);
amp = ap->amp;
/*
* Return EOF for character devices, EIO for others
*/
if (sp->a_vp->v_type != VREG) {
error = EIO;
goto reterr;
}
if (uio->uio_resid == 0)
goto reterr;
if (uio->uio_offset < 0) {
error = EINVAL;
goto reterr;
}
/*
* to expensive to let general algorithm figure out that
* we are beyond the file. Do it now.
*/
if (uio->uio_offset >= ap->fsize)
goto reterr;
/*
* taken from ufs_read()
*/
if (vp->v_type == VREG && IS_FFS(amp)) {
error = 0;
while (uio->uio_resid > 0) {
void *win;
vsize_t bytelen = MIN(ap->fsize - uio->uio_offset,
uio->uio_resid);
if (bytelen == 0) {
break;
}
win = ubc_alloc(&vp->v_uobj, uio->uio_offset,
&bytelen, UBC_READ);
error = uiomove(win, bytelen, uio);
ubc_release(win, 0);
if (error) {
break;
}
}
goto out;
}
do {
size = amp->dbsize;
lbn = uio->uio_offset / size;
on = uio->uio_offset % size;
n = MIN(size - on, uio->uio_resid);
diff = ap->fsize - uio->uio_offset;
/*
* check for EOF
*/
if (diff <= 0)
return(0);
if (diff < n)
n = diff;
/*
* read ahead could possibly be worth something
* but not much as ados makes little attempt to
* make things contigous
*/
error = bread(sp->a_vp, lbn * amp->bsize / DEV_BSIZE,
amp->bsize, NOCRED, &bp);
if (error) {
brelse(bp);
goto reterr;
}
if (!IS_FFS(amp)) {
if (bp->b_resid > 0)
error = EIO; /* OFS needs the complete block */
else if (adoswordn(bp, 0) != BPT_DATA) {
#ifdef DIAGNOSTIC
printf("adosfs: bad primary type blk %ld\n",
bp->b_blkno / (amp->bsize / DEV_BSIZE));
#endif
error = EINVAL;
} else if (adoscksum(bp, ap->nwords)) {
#ifdef DIAGNOSTIC
printf("adosfs: blk %ld failed cksum.\n",
bp->b_blkno / (amp->bsize / DEV_BSIZE));
#endif
error = EINVAL;
}
}
if (error) {
brelse(bp);
goto reterr;
}
#ifdef ADOSFS_DIAGNOSTIC
printf(" %d+%d-%d+%d", lbn, on, lbn, n);
#endif
n = MIN(n, size - bp->b_resid);
error = uiomove(bp->b_data + on +
amp->bsize - amp->dbsize, (int)n, uio);
brelse(bp);
} while (error == 0 && uio->uio_resid > 0 && n != 0);
out:
reterr:
#ifdef ADOSFS_DIAGNOSTIC
printf(" %d)", error);
#endif
return(error);
}
int
adosfs_write(v)
void *v;
{
#ifdef ADOSFS_DIAGNOSTIC
struct vop_write_args /* {
struct vnode *a_vp;
struct uio *a_uio;
int a_ioflag;
struct ucred *a_cred;
} */ *sp = v;
advopprint(sp);
printf(" EOPNOTSUPP)");
#endif
return(EOPNOTSUPP);
}
/*
* Just call the device strategy routine
*/
int
adosfs_strategy(v)
void *v;
{
struct vop_strategy_args /* {
struct buf *a_bp;
} */ *sp = v;
struct buf *bp;
struct anode *ap;
struct vnode *vp;
int error;
#ifdef ADOSFS_DIAGNOSTIC
advopprint(sp);
#endif
error = 0;
bp = sp->a_bp;
if (bp->b_vp == NULL) {
bp->b_flags |= B_ERROR;
biodone(bp);
error = EIO;
goto reterr;
}
vp = bp->b_vp;
ap = VTOA(vp);
if (bp->b_blkno == bp->b_lblkno) {
error = VOP_BMAP(vp, bp->b_lblkno, NULL, &bp->b_blkno, NULL);
if (error) {
bp->b_flags |= B_ERROR;
biodone(bp);
goto reterr;
}
}
if ((long)bp->b_blkno == -1) {
biodone(bp);
error = 0;
goto reterr;
}
vp = ap->amp->devvp;
bp->b_dev = vp->v_rdev;
VOCALL(vp->v_op, VOFFSET(vop_strategy), sp);
reterr:
#ifdef ADOSFS_DIAGNOSTIC
printf(" %d)", error);
#endif
return(error);
}
int
adosfs_link(v)
void *v;
{
struct vop_link_args /* {
struct vnode *a_dvp;
struct vnode *a_vp;
struct componentname *a_cnp;
} */ *ap = v;
VOP_ABORTOP(ap->a_dvp, ap->a_cnp);
vput(ap->a_dvp);
return (EROFS);
}
int
adosfs_symlink(v)
void *v;
{
struct vop_symlink_args /* {
struct vnode *a_dvp;
struct vnode **a_vpp;
struct componentname *a_cnp;
struct vattr *a_vap;
char *a_target;
} */ *ap = v;
VOP_ABORTOP(ap->a_dvp, ap->a_cnp);
vput(ap->a_dvp);
return (EROFS);
}
/*
* Wait until the vnode has finished changing state.
*/
int
adosfs_bmap(v)
void *v;
{
struct vop_bmap_args /* {
struct vnode *a_vp;
daddr_t a_bn;
struct vnode **a_vpp;
daddr_t *a_bnp;
int *a_runp;
} */ *sp = v;
struct anode *ap;
struct buf *flbp;
long nb, flblk, flblkoff, fcnt;
daddr_t *bnp;
daddr_t bn;
int error;
#ifdef ADOSFS_DIAGNOSTIC
advopprint(sp);
#endif
ap = VTOA(sp->a_vp);
bn = sp->a_bn / (ap->amp->bsize / DEV_BSIZE);
bnp = sp->a_bnp;
if (sp->a_runp) {
*sp->a_runp = 0;
}
error = 0;
if (sp->a_vpp != NULL)
*sp->a_vpp = ap->amp->devvp;
if (bnp == NULL)
goto reterr;
if (bn < 0) {
error = EFBIG;
goto reterr;
}
if (sp->a_vp->v_type != VREG) {
error = EINVAL;
goto reterr;
}
/*
* walk the chain of file list blocks until we find
* the one that will yield the block pointer we need.
*/
if (ap->type == AFILE)
nb = ap->block; /* pointer to ourself */
else if (ap->type == ALFILE)
nb = ap->linkto; /* pointer to real file */
else {
error = EINVAL;
goto reterr;
}
flblk = bn / ANODENDATBLKENT(ap);
flbp = NULL;
/*
* check last indirect block cache
*/
if (flblk < ap->lastlindblk)
fcnt = 0;
else {
flblk -= ap->lastlindblk;
fcnt = ap->lastlindblk;
nb = ap->lastindblk;
}
while (flblk >= 0) {
if (flbp)
brelse(flbp);
if (nb == 0) {
#ifdef DIAGNOSTIC
printf("adosfs: bad file list chain.\n");
#endif
error = EINVAL;
goto reterr;
}
error = bread(ap->amp->devvp, nb * ap->amp->bsize / DEV_BSIZE,
ap->amp->bsize, NOCRED, &flbp);
if (error) {
brelse(flbp);
goto reterr;
}
if (adoscksum(flbp, ap->nwords)) {
#ifdef DIAGNOSTIC
printf("adosfs: blk %ld failed cksum.\n", nb);
#endif
brelse(flbp);
error = EINVAL;
goto reterr;
}
/*
* update last indirect block cache
*/
ap->lastlindblk = fcnt++;
ap->lastindblk = nb;
nb = adoswordn(flbp, ap->nwords - 2);
flblk--;
}
/*
* calculate offset of block number in table. The table starts
* at nwords - 51 and goes to offset 6 or less if indicated by the
* valid table entries stored at offset ADBI_NBLKTABENT.
*/
flblkoff = bn % ANODENDATBLKENT(ap);
if (flblkoff < adoswordn(flbp, 2 /* ADBI_NBLKTABENT */)) {
flblkoff = (ap->nwords - 51) - flblkoff;
*bnp = adoswordn(flbp, flblkoff) * ap->amp->bsize / DEV_BSIZE;
} else {
#ifdef DIAGNOSTIC
printf("flblk offset %ld too large in lblk %ld blk %d\n",
flblkoff, bn / (ap->amp->bsize / DEV_BSIZE), flbp->b_blkno);
#endif
error = EINVAL;
}
brelse(flbp);
reterr:
#ifdef ADOSFS_DIAGNOSTIC
if (error == 0 && bnp)
printf(" %d => %d", bn, *bnp);
printf(" %d)", error);
#endif
return(error);
}
/*
* Print out the contents of a adosfs vnode.
*/
/* ARGSUSED */
int
adosfs_print(v)
void *v;
{
#if 0
struct vop_print_args /* {
struct vnode *a_vp;
} */ *sp = v;
#endif
return(0);
}
struct adirent {
u_long fileno;
u_short reclen;
char type;
char namlen;
char name[32]; /* maxlen of 30 plus 2 NUL's */
};
int
adosfs_readdir(v)
void *v;
{
struct vop_readdir_args /* {
struct vnode *a_vp;
struct uio *a_uio;
struct ucred *a_cred;
int *a_eofflag;
off_t **a_cookies;
int *a_ncookies;
} */ *sp = v;
int error, useri, chainc, hashi, scanned, uavail;
struct adirent ad, *adp;
struct anode *pap, *ap;
struct adosfsmount *amp;
struct vnode *vp;
struct uio *uio;
u_long nextbn;
off_t uoff, *cookies = NULL;
int ncookies = 0;
#ifdef ADOSFS_DIAGNOSTIC
advopprint(sp);
#endif
if (sp->a_vp->v_type != VDIR) {
error = ENOTDIR;
goto reterr;
}
uio = sp->a_uio;
uoff = uio->uio_offset;
if (uoff < 0) {
error = EINVAL;
goto reterr;
}
pap = VTOA(sp->a_vp);
amp = pap->amp;
adp = &ad;
error = nextbn = hashi = chainc = scanned = 0;
uavail = uio->uio_resid / sizeof(ad);
useri = uoff / sizeof(ad);
/*
* if no slots available or offset requested is not on a slot boundry
*/
if (uavail < 1 || uoff % sizeof(ad)) {
error = EINVAL;
goto reterr;
}
if (sp->a_ncookies) {
ncookies = 0;
cookies = malloc(sizeof (off_t) * uavail, M_TEMP, M_WAITOK);
*sp->a_cookies = cookies;
}
while (uavail) {
if (hashi == pap->ntabent) {
*sp->a_eofflag = 1;
break;
}
if (pap->tab[hashi] == 0) {
hashi++;
continue;
}
if (nextbn == 0)
nextbn = pap->tab[hashi];
/*
* first determine if we can skip this chain
*/
if (chainc == 0) {
int skip;
skip = useri - scanned;
if (pap->tabi[hashi] > 0 && pap->tabi[hashi] <= skip) {
scanned += pap->tabi[hashi];
hashi++;
nextbn = 0;
continue;
}
}
/*
* now [continue to] walk the chain
*/
ap = NULL;
do {
error = VFS_VGET(amp->mp, (ino_t)nextbn, &vp);
if (error)
goto reterr;
ap = VTOA(vp);
scanned++;
chainc++;
nextbn = ap->hashf;
/*
* check for end of chain.
*/
if (nextbn == 0) {
pap->tabi[hashi] = chainc;
hashi++;
chainc = 0;
} else if (pap->tabi[hashi] <= 0 &&
-chainc < pap->tabi[hashi])
pap->tabi[hashi] = -chainc;
if (useri >= scanned) {
vput(vp);
ap = NULL;
}
} while (ap == NULL && nextbn != 0);
/*
* we left the loop but without a result so do main over.
*/
if (ap == NULL)
continue;
/*
* Fill in dirent record
*/
memset(adp, 0, sizeof(struct adirent));
adp->fileno = ap->block;
/*
* this deserves an function in kern/vfs_subr.c
*/
switch (ATOV(ap)->v_type) {
case VREG:
adp->type = DT_REG;
break;
case VDIR:
adp->type = DT_DIR;
break;
case VLNK:
adp->type = DT_LNK;
break;
default:
adp->type = DT_UNKNOWN;
break;
}
adp->reclen = sizeof(struct adirent);
adp->namlen = strlen(ap->name);
memcpy(adp->name, ap->name, adp->namlen);
vput(vp);
error = uiomove((caddr_t) adp, sizeof(struct adirent), uio);
if (error)
break;
if (sp->a_ncookies) {
*cookies++ = uoff;
ncookies++;
}
uoff += sizeof(struct adirent);
useri++;
uavail--;
}
#if doesnt_uiomove_handle_this
uio->uio_offset = uoff;
#endif
reterr:
#ifdef ADOSFS_DIAGNOSTIC
printf(" %d)", error);
#endif
if (sp->a_ncookies) {
if (error) {
free(*sp->a_cookies, M_TEMP);
*sp->a_ncookies = 0;
*sp->a_cookies = NULL;
} else
*sp->a_ncookies = ncookies;
}
return(error);
}
int
adosfs_access(v)
void *v;
{
struct vop_access_args /* {
struct vnode *a_vp;
int a_mode;
struct ucred *a_cred;
struct proc *a_p;
} */ *sp = v;
struct anode *ap;
struct vnode *vp = sp->a_vp;
int error;
#ifdef ADOSFS_DIAGNOSTIC
advopprint(sp);
#endif
ap = VTOA(vp);
#ifdef DIAGNOSTIC
if (!VOP_ISLOCKED(vp)) {
vprint("adosfs_access: not locked", sp->a_vp);
panic("adosfs_access: not locked");
}
#endif
/*
* Disallow write attempts unless the file is a socket,
* fifo, or a block or character device resident on the
* file system.
*/
if (sp->a_mode & VWRITE) {
switch (vp->v_type) {
case VDIR:
case VLNK:
case VREG:
return (EROFS);
default:
break;
}
}
#ifdef QUOTA
#endif
error = vaccess(sp->a_vp->v_type, adunixprot(ap->adprot) & ap->amp->mask,
ap->uid, ap->gid, sp->a_mode, sp->a_cred);
#ifdef ADOSFS_DIAGNOSTIC
printf(" %d)", error);
#endif
return(error);
}
int
adosfs_readlink(v)
void *v;
{
struct vop_readlink_args /* {
struct vnode *a_vp;
struct uio *a_uio;
struct ucred *a_cred;
} */ *sp = v;
struct anode *ap;
int error;
#ifdef ADOSFS_DIAGNOSTIC
advopprint(sp);
#endif
ap = VTOA(sp->a_vp);
error = uiomove(ap->slinkto, strlen(ap->slinkto), sp->a_uio);
#ifdef ADOSFS_DIAGNOSTIC
printf(" %d)", error);
#endif
return (error);
}
/*ARGSUSED*/
int
adosfs_inactive(v)
void *v;
{
struct vop_inactive_args /* {
struct vnode *a_vp;
struct proc *a_p;
} */ *sp = v;
struct vnode *vp = sp->a_vp;
struct proc *p = sp->a_p;
#ifdef ADOSFS_DIAGNOSTIC
advopprint(sp);
#endif
VOP_UNLOCK(vp, 0);
/* XXX this needs to check if file was deleted */
vrecycle(vp, NULL, p);
#ifdef ADOSFS_DIAGNOSTIC
printf(" 0)");
#endif
return(0);
}
/*
* the kernel wants its vnode back.
* no lock needed we are being called from vclean()
*/
int
adosfs_reclaim(v)
void *v;
{
struct vop_reclaim_args /* {
struct vnode *a_vp;
} */ *sp = v;
struct vnode *vp;
struct anode *ap;
#ifdef ADOSFS_DIAGNOSTIC
printf("(reclaim 0)");
#endif
vp = sp->a_vp;
ap = VTOA(vp);
LIST_REMOVE(ap, link);
cache_purge(vp);
if (vp->v_type == VDIR && ap->tab)
free(ap->tab, M_ANODE);
else if (vp->v_type == VLNK && ap->slinkto)
free(ap->slinkto, M_ANODE);
pool_put(&adosfs_node_pool, ap);
vp->v_data = NULL;
return(0);
}
/*
* POSIX pathconf info, grabbed from kern/u fs, probably need to
* investigate exactly what each return type means as they are probably
* not valid currently
*/
int
adosfs_pathconf(v)
void *v;
{
struct vop_pathconf_args /* {
struct vnode *a_vp;
int a_name;
register_t *a_retval;
} */ *sp = v;
switch (sp->a_name) {
case _PC_LINK_MAX:
*sp->a_retval = LINK_MAX;
return (0);
case _PC_MAX_CANON:
*sp->a_retval = MAX_CANON;
return (0);
case _PC_MAX_INPUT:
*sp->a_retval = MAX_INPUT;
return (0);
case _PC_PIPE_BUF:
*sp->a_retval = PIPE_BUF;
return (0);
case _PC_CHOWN_RESTRICTED:
*sp->a_retval = 1;
return (0);
case _PC_VDISABLE:
*sp->a_retval = _POSIX_VDISABLE;
return (0);
case _PC_SYNC_IO:
*sp->a_retval = 1;
return (0);
case _PC_FILESIZEBITS:
*sp->a_retval = 32;
return (0);
default:
return (EINVAL);
}
/* NOTREACHED */
}
Reference in New Issue View Git Blame Copy Permalink