d/freebsd-skq
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
cc0cbc6b34
freebsd-skq/sys/fs/hpfs/hpfs_vnops.c

1251 lines
27 KiB
C
Raw Blame History

/*-
* Copyright (c) 1998, 1999 Semen Ustimenko (semenu@FreeBSD.org)
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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.
*
* $FreeBSD$
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/proc.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/vnode.h>
#include <sys/mount.h>
#include <sys/namei.h>
#include <sys/malloc.h>
#include <sys/bio.h>
#include <sys/buf.h>
#include <sys/dirent.h>
#include <vm/vm.h>
#include <vm/vm_param.h>
#include <vm/vm_page.h>
#include <vm/vm_object.h>
#include <vm/vm_pager.h>
#include <vm/vnode_pager.h>
#include <vm/vm_extern.h>
#include <sys/unistd.h> /* for pathconf(2) constants */
#include <fs/hpfs/hpfs.h>
#include <fs/hpfs/hpfsmount.h>
#include <fs/hpfs/hpfs_subr.h>
#include <fs/hpfs/hpfs_ioctl.h>
static int hpfs_de_uiomove(struct hpfsmount *, struct hpfsdirent *,
struct uio *);
static vop_ioctl_t hpfs_ioctl;
static vop_read_t hpfs_read;
static vop_write_t hpfs_write;
static vop_getattr_t hpfs_getattr;
static vop_setattr_t hpfs_setattr;
static vop_inactive_t hpfs_inactive;
static vop_print_t hpfs_print;
static vop_reclaim_t hpfs_reclaim;
static vop_strategy_t hpfs_strategy;
static vop_access_t hpfs_access;
static vop_open_t hpfs_open;
static vop_close_t hpfs_close;
static vop_readdir_t hpfs_readdir;
static vop_cachedlookup_t hpfs_lookup;
static vop_create_t hpfs_create;
static vop_remove_t hpfs_remove;
static vop_bmap_t hpfs_bmap;
static vop_fsync_t hpfs_fsync;
static vop_pathconf_t hpfs_pathconf;
static int
hpfs_fsync(ap)
struct vop_fsync_args /* {
struct vnode *a_vp;
struct ucred *a_cred;
int a_waitfor;
struct thread *a_td;
} */ *ap;
{
/*
* Flush our dirty buffers.
*/
vop_stdfsync(ap);
/*
* Write out the on-disc version of the vnode.
*/
return hpfs_update(VTOHP(ap->a_vp));
}
static int
hpfs_ioctl (
struct vop_ioctl_args /* {
struct vnode *a_vp;
u_long a_command;
caddr_t a_data;
int a_fflag;
struct ucred *a_cred;
struct thread *a_td;
} */ *ap)
{
register struct vnode *vp = ap->a_vp;
register struct hpfsnode *hp = VTOHP(vp);
int error;
printf("hpfs_ioctl(0x%x, 0x%lx, 0x%p, 0x%x): ",
hp->h_no, ap->a_command, ap->a_data, ap->a_fflag);
switch (ap->a_command) {
case HPFSIOCGEANUM: {
u_long eanum;
u_long passed;
struct ea *eap;
eanum = 0;
if (hp->h_fn.fn_ealen > 0) {
eap = (struct ea *)&(hp->h_fn.fn_int);
passed = 0;
while (passed < hp->h_fn.fn_ealen) {
printf("EAname: %s\n", EA_NAME(eap));
eanum++;
passed += sizeof(struct ea) +
eap->ea_namelen + 1 + eap->ea_vallen;
eap = (struct ea *)((caddr_t)hp->h_fn.fn_int +
passed);
}
error = 0;
} else {
error = ENOENT;
}
printf("%lu eas\n", eanum);
*(u_long *)ap->a_data = eanum;
break;
}
case HPFSIOCGEASZ: {
u_long eanum;
u_long passed;
struct ea *eap;
printf("EA%ld\n", *(u_long *)ap->a_data);
eanum = 0;
if (hp->h_fn.fn_ealen > 0) {
eap = (struct ea *)&(hp->h_fn.fn_int);
passed = 0;
error = ENOENT;
while (passed < hp->h_fn.fn_ealen) {
printf("EAname: %s\n", EA_NAME(eap));
if (eanum == *(u_long *)ap->a_data) {
*(u_long *)ap->a_data =
eap->ea_namelen + 1 +
eap->ea_vallen;
error = 0;
break;
}
eanum++;
passed += sizeof(struct ea) +
eap->ea_namelen + 1 + eap->ea_vallen;
eap = (struct ea *)((caddr_t)hp->h_fn.fn_int +
passed);
}
} else {
error = ENOENT;
}
break;
}
case HPFSIOCRDEA: {
u_long eanum;
u_long passed;
struct hpfs_rdea *rdeap;
struct ea *eap;
rdeap = (struct hpfs_rdea *)ap->a_data;
printf("EA%ld\n", rdeap->ea_no);
eanum = 0;
if (hp->h_fn.fn_ealen > 0) {
eap = (struct ea *)&(hp->h_fn.fn_int);
passed = 0;
error = ENOENT;
while (passed < hp->h_fn.fn_ealen) {
printf("EAname: %s\n", EA_NAME(eap));
if (eanum == rdeap->ea_no) {
rdeap->ea_sz = eap->ea_namelen + 1 +
eap->ea_vallen;
copyout(EA_NAME(eap),rdeap->ea_data,
rdeap->ea_sz);
error = 0;
break;
}
eanum++;
passed += sizeof(struct ea) +
eap->ea_namelen + 1 + eap->ea_vallen;
eap = (struct ea *)((caddr_t)hp->h_fn.fn_int +
passed);
}
} else {
error = ENOENT;
}
break;
}
default:
error = ENOTTY;
break;
}
return (error);
}
/*
* Map file offset to disk offset.
*/
int
hpfs_bmap(ap)
struct vop_bmap_args /* {
struct vnode *a_vp;
daddr_t a_bn;
struct bufobj **a_bop;
daddr_t *a_bnp;
int *a_runp;
int *a_runb;
} */ *ap;
{
register struct hpfsnode *hp = VTOHP(ap->a_vp);
daddr_t blkno;
int error;
if (ap->a_bop != NULL)
*ap->a_bop = &hp->h_devvp->v_bufobj;
if (ap->a_runb != NULL)
*ap->a_runb = 0;
if (ap->a_bnp == NULL)
return (0);
dprintf(("hpfs_bmap(0x%x, 0x%x): ",hp->h_no, ap->a_bn));
error = hpfs_hpbmap (hp, ap->a_bn, &blkno, ap->a_runp);
*ap->a_bnp = blkno;
return (error);
}
static int
hpfs_read(ap)
struct vop_read_args /* {
struct vnode *a_vp;
struct uio *a_uio;
int a_ioflag;
struct ucred *a_cred;
} */ *ap;
{
register struct vnode *vp = ap->a_vp;
register struct hpfsnode *hp = VTOHP(vp);
struct uio *uio = ap->a_uio;
struct buf *bp;
u_int xfersz, toread;
u_int off;
daddr_t lbn, bn;
int resid;
int runl;
int error = 0;
resid = min (uio->uio_resid, hp->h_fn.fn_size - uio->uio_offset);
dprintf(("hpfs_read(0x%x, off: %d resid: %d, segflg: %d): [resid: 0x%x]\n",hp->h_no,(u_int32_t)uio->uio_offset,uio->uio_resid,uio->uio_segflg, resid));
while (resid) {
lbn = uio->uio_offset >> DEV_BSHIFT;
off = uio->uio_offset & (DEV_BSIZE - 1);
dprintf(("hpfs_read: resid: 0x%x lbn: 0x%x off: 0x%x\n",
uio->uio_resid, lbn, off));
error = hpfs_hpbmap(hp, lbn, &bn, &runl);
if (error)
return (error);
toread = min(off + resid, min(DFLTPHYS, (runl+1)*DEV_BSIZE));
xfersz = (toread + DEV_BSIZE - 1) & ~(DEV_BSIZE - 1);
dprintf(("hpfs_read: bn: 0x%x (0x%x) toread: 0x%x (0x%x)\n",
bn, runl, toread, xfersz));
if (toread == 0)
break;
error = bread(hp->h_devvp, bn, xfersz, NOCRED, &bp);
if (error) {
brelse(bp);
break;
}
error = uiomove(bp->b_data + off, toread - off, uio);
if(error) {
brelse(bp);
break;
}
brelse(bp);
resid -= toread;
}
dprintf(("hpfs_read: successful\n"));
return (error);
}
static int
hpfs_write(ap)
struct vop_write_args /* {
struct vnode *a_vp;
struct uio *a_uio;
int a_ioflag;
struct ucred *a_cred;
} */ *ap;
{
register struct vnode *vp = ap->a_vp;
register struct hpfsnode *hp = VTOHP(vp);
struct uio *uio = ap->a_uio;
struct buf *bp;
u_int xfersz, towrite;
u_int off;
daddr_t lbn, bn;
int runl;
int error = 0;
dprintf(("hpfs_write(0x%x, off: %d resid: %d, segflg: %d):\n",hp->h_no,(u_int32_t)uio->uio_offset,uio->uio_resid,uio->uio_segflg));
if (ap->a_ioflag & IO_APPEND) {
dprintf(("hpfs_write: APPEND mode\n"));
uio->uio_offset = hp->h_fn.fn_size;
}
if (uio->uio_offset + uio->uio_resid > hp->h_fn.fn_size) {
error = hpfs_extend (hp, uio->uio_offset + uio->uio_resid);
if (error) {
printf("hpfs_write: hpfs_extend FAILED %d\n", error);
return (error);
}
}
while (uio->uio_resid) {
lbn = uio->uio_offset >> DEV_BSHIFT;
off = uio->uio_offset & (DEV_BSIZE - 1);
dprintf(("hpfs_write: resid: 0x%x lbn: 0x%x off: 0x%x\n",
uio->uio_resid, lbn, off));
error = hpfs_hpbmap(hp, lbn, &bn, &runl);
if (error)
return (error);
towrite = min(off + uio->uio_resid, min(DFLTPHYS, (runl+1)*DEV_BSIZE));
xfersz = (towrite + DEV_BSIZE - 1) & ~(DEV_BSIZE - 1);
dprintf(("hpfs_write: bn: 0x%x (0x%x) towrite: 0x%x (0x%x)\n",
bn, runl, towrite, xfersz));
if ((off == 0) && (towrite == xfersz)) {
bp = getblk(hp->h_devvp, bn, xfersz, 0, 0, 0);
clrbuf(bp);
} else {
error = bread(hp->h_devvp, bn, xfersz, NOCRED, &bp);
if (error) {
brelse(bp);
return (error);
}
}
error = uiomove(bp->b_data + off, towrite - off, uio);
if(error) {
brelse(bp);
return (error);
}
if (ap->a_ioflag & IO_SYNC)
bwrite(bp);
else
bawrite(bp);
}
dprintf(("hpfs_write: successful\n"));
return (0);
}
/*
* XXXXX do we need hpfsnode locking inside?
*/
static int
hpfs_getattr(ap)
struct vop_getattr_args /* {
struct vnode *a_vp;
struct vattr *a_vap;
struct ucred *a_cred;
struct thread *a_td;
} */ *ap;
{
register struct vnode *vp = ap->a_vp;
register struct hpfsnode *hp = VTOHP(vp);
register struct vattr *vap = ap->a_vap;
int error;
dprintf(("hpfs_getattr(0x%x):\n", hp->h_no));
vap->va_fsid = dev2udev(hp->h_dev);
vap->va_fileid = hp->h_no;
vap->va_mode = hp->h_mode;
vap->va_nlink = 1;
vap->va_uid = hp->h_uid;
vap->va_gid = hp->h_gid;
vap->va_rdev = 0; /* XXX UNODEV ? */
vap->va_size = hp->h_fn.fn_size;
vap->va_bytes = ((hp->h_fn.fn_size + DEV_BSIZE-1) & ~(DEV_BSIZE-1)) +
DEV_BSIZE;
if (!(hp->h_flag & H_PARVALID)) {
error = hpfs_validateparent(hp);
if (error)
return (error);
}
vap->va_atime = hpfstimetounix(hp->h_atime);
vap->va_mtime = hpfstimetounix(hp->h_mtime);
vap->va_ctime = hpfstimetounix(hp->h_ctime);
vap->va_flags = 0;
vap->va_gen = 0;
vap->va_blocksize = DEV_BSIZE;
vap->va_type = vp->v_type;
vap->va_filerev = 0;
return (0);
}
/*
* XXXXX do we need hpfsnode locking inside?
*/
static int
hpfs_setattr(ap)
struct vop_setattr_args /* {
struct vnode *a_vp;
struct vattr *a_vap;
struct ucred *a_cred;
struct thread *a_td;
} */ *ap;
{
struct vnode *vp = ap->a_vp;
struct hpfsnode *hp = VTOHP(vp);
struct vattr *vap = ap->a_vap;
struct ucred *cred = ap->a_cred;
struct thread *td = ap->a_td;
int error;
dprintf(("hpfs_setattr(0x%x):\n", hp->h_no));
/*
* Check for unsettable attributes.
*/
if ((vap->va_type != VNON) || (vap->va_nlink != VNOVAL) ||
(vap->va_fsid != VNOVAL) || (vap->va_fileid != VNOVAL) ||
(vap->va_blocksize != VNOVAL) || (vap->va_rdev != VNOVAL) ||
(vap->va_bytes != VNOVAL) || (vap->va_gen != VNOVAL)) {
dprintf(("hpfs_setattr: changing nonsettable attr\n"));
return (EINVAL);
}
/* Can't change flags XXX Could be implemented */
if (vap->va_flags != VNOVAL) {
printf("hpfs_setattr: FLAGS CANNOT BE SET\n");
return (EINVAL);
}
/* Can't change uid/gid XXX Could be implemented */
if (vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (gid_t)VNOVAL) {
printf("hpfs_setattr: UID/GID CANNOT BE SET\n");
return (EINVAL);
}
/* Can't change mode XXX Could be implemented */
if (vap->va_mode != (mode_t)VNOVAL) {
printf("hpfs_setattr: MODE CANNOT BE SET\n");
return (EINVAL);
}
/* Update times */
if (vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL) {
if (vp->v_mount->mnt_flag & MNT_RDONLY)
return (EROFS);
if (cred->cr_uid != hp->h_uid &&
(error = suser_cred(cred, SUSER_ALLOWJAIL)) &&
((vap->va_vaflags & VA_UTIMES_NULL) == 0 ||
(error = VOP_ACCESS(vp, VWRITE, cred, td))))
return (error);
if (vap->va_atime.tv_sec != VNOVAL)
hp->h_atime = vap->va_atime.tv_sec;
if (vap->va_mtime.tv_sec != VNOVAL)
hp->h_mtime = vap->va_mtime.tv_sec;
hp->h_flag |= H_PARCHANGE;
}
if (vap->va_size != VNOVAL) {
switch (vp->v_type) {
case VDIR:
return (EISDIR);
case VREG:
if (vp->v_mount->mnt_flag & MNT_RDONLY)
return (EROFS);
break;
default:
printf("hpfs_setattr: WRONG v_type\n");
return (EINVAL);
}
if (vap->va_size < hp->h_fn.fn_size) {
error = vtruncbuf(vp, cred, td, vap->va_size, DEV_BSIZE);
if (error)
return (error);
error = hpfs_truncate(hp, vap->va_size);
if (error)
return (error);
} else if (vap->va_size > hp->h_fn.fn_size) {
vnode_pager_setsize(vp, vap->va_size);
error = hpfs_extend(hp, vap->va_size);
if (error)
return (error);
}
}
return (0);
}
/*
* Last reference to a node. If necessary, write or delete it.
*/
int
hpfs_inactive(ap)
struct vop_inactive_args /* {
struct vnode *a_vp;
} */ *ap;
{
register struct vnode *vp = ap->a_vp;
register struct hpfsnode *hp = VTOHP(vp);
int error;
dprintf(("hpfs_inactive(0x%x): \n", hp->h_no));
if (hp->h_flag & H_CHANGE) {
dprintf(("hpfs_inactive: node changed, update\n"));
error = hpfs_update (hp);
if (error)
return (error);
}
if (hp->h_flag & H_PARCHANGE) {
dprintf(("hpfs_inactive: parent node changed, update\n"));
error = hpfs_updateparent (hp);
if (error)
return (error);
}
if (prtactive && vrefcnt(vp) != 0)
vprint("hpfs_inactive: pushing active", vp);
if (hp->h_flag & H_INVAL) {
VOP_UNLOCK(vp,0,ap->a_td);
vrecycle(vp, NULL, ap->a_td);
return (0);
}
VOP_UNLOCK(vp,0,ap->a_td);
return (0);
}
/*
* Reclaim an inode so that it can be used for other purposes.
*/
int
hpfs_reclaim(ap)
struct vop_reclaim_args /* {
struct vnode *a_vp;
} */ *ap;
{
register struct vnode *vp = ap->a_vp;
register struct hpfsnode *hp = VTOHP(vp);
dprintf(("hpfs_reclaim(0x%x0): \n", hp->h_no));
hpfs_hphashrem(hp);
/* Purge old data structures associated with the inode. */
if (hp->h_devvp) {
vrele(hp->h_devvp);
hp->h_devvp = NULL;
}
mtx_destroy(&hp->h_interlock);
vp->v_data = NULL;
FREE(hp, M_HPFSNO);
return (0);
}
static int
hpfs_print(ap)
struct vop_print_args /* {
struct vnode *a_vp;
} */ *ap;
{
register struct vnode *vp = ap->a_vp;
register struct hpfsnode *hp = VTOHP(vp);
printf("\tino 0x%x\n", hp->h_no);
return (0);
}
/*
* Calculate the logical to physical mapping if not done already,
* then call the device strategy routine.
*
* In order to be able to swap to a file, the hpfs_hpbmap operation may not
* deadlock on memory. See hpfs_bmap() for details. XXXXXXX (not impl)
*/
int
hpfs_strategy(ap)
struct vop_strategy_args /* {
struct buf *a_bp;
} */ *ap;
{
register struct buf *bp = ap->a_bp;
register struct vnode *vp = ap->a_vp;
register struct hpfsnode *hp = VTOHP(ap->a_vp);
daddr_t blkno;
struct bufobj *bo;
int error;
dprintf(("hpfs_strategy(): \n"));
if (vp->v_type == VBLK || vp->v_type == VCHR)
panic("hpfs_strategy: spec");
if (bp->b_blkno == bp->b_lblkno) {
error = hpfs_hpbmap (hp, bp->b_lblkno, &blkno, NULL);
bp->b_blkno = blkno;
if (error) {
printf("hpfs_strategy: hpfs_bpbmap FAILED %d\n", error);
bp->b_error = error;
bp->b_ioflags |= BIO_ERROR;
bufdone(bp);
return (error);
}
if ((long)bp->b_blkno == -1)
vfs_bio_clrbuf(bp);
}
if ((long)bp->b_blkno == -1) {
bufdone(bp);
return (0);
}
bp->b_iooffset = dbtob(bp->b_blkno);
bo = hp->h_hpmp->hpm_bo;
BO_STRATEGY(bo, bp);
return (0);
}
/*
* XXXXX do we need hpfsnode locking inside?
*/
int
hpfs_access(ap)
struct vop_access_args /* {
struct vnode *a_vp;
int a_mode;
struct ucred *a_cred;
struct thread *a_td;
} */ *ap;
{
struct vnode *vp = ap->a_vp;
struct hpfsnode *hp = VTOHP(vp);
mode_t mode = ap->a_mode;
dprintf(("hpfs_access(0x%x):\n", hp->h_no));
/*
* Disallow write attempts on read-only filesystems;
* unless the file is a socket, fifo, or a block or
* character device resident on the filesystem.
*/
if (mode & VWRITE) {
switch ((int)vp->v_type) {
case VDIR:
case VLNK:
case VREG:
if (vp->v_mount->mnt_flag & MNT_RDONLY)
return (EROFS);
break;
}
}
return (vaccess(vp->v_type, hp->h_mode, hp->h_uid, hp->h_gid,
ap->a_mode, ap->a_cred, NULL));
}
/*
* Open called.
*
* Nothing to do.
*/
/* ARGSUSED */
static int
hpfs_open(ap)
struct vop_open_args /* {
struct vnode *a_vp;
int a_mode;
struct ucred *a_cred;
struct thread *a_td;
} */ *ap;
{
#if HPFS_DEBUG
register struct vnode *vp = ap->a_vp;
register struct hpfsnode *hp = VTOHP(vp);
printf("hpfs_open(0x%x):\n",hp->h_no);
#endif
/*
* Files marked append-only must be opened for appending.
*/
return (0);
}
/*
* Close called.
*
* Update the times on the inode.
*/
/* ARGSUSED */
static int
hpfs_close(ap)
struct vop_close_args /* {
struct vnode *a_vp;
int a_fflag;
struct ucred *a_cred;
struct thread *a_td;
} */ *ap;
{
#if HPFS_DEBUG
register struct vnode *vp = ap->a_vp;
register struct hpfsnode *hp = VTOHP(vp);
printf("hpfs_close: %d\n",hp->h_no);
#endif
return (0);
}
static int
hpfs_de_uiomove (
struct hpfsmount *hpmp,
struct hpfsdirent *dep,
struct uio *uio)
{
struct dirent cde;
int i, error;
dprintf(("[no: 0x%x, size: %d, name: %2d:%.*s, flag: 0x%x] ",
dep->de_fnode, dep->de_size, dep->de_namelen,
dep->de_namelen, dep->de_name, dep->de_flag));
/*strncpy(cde.d_name, dep->de_name, dep->de_namelen);*/
for (i=0; i<dep->de_namelen; i++)
cde.d_name[i] = hpfs_d2u(hpmp, dep->de_name[i]);
cde.d_name[dep->de_namelen] = '\0';
cde.d_namlen = dep->de_namelen;
cde.d_fileno = dep->de_fnode;
cde.d_type = (dep->de_flag & DE_DIR) ? DT_DIR : DT_REG;
cde.d_reclen = sizeof(struct dirent);
error = uiomove((char *)&cde, sizeof(struct dirent), uio);
if (error)
return (error);
dprintf(("[0x%x] ", uio->uio_resid));
return (error);
}
static struct dirent hpfs_de_dot =
{ 0, sizeof(struct dirent), DT_DIR, 1, "." };
static struct dirent hpfs_de_dotdot =
{ 0, sizeof(struct dirent), DT_DIR, 2, ".." };
int
hpfs_readdir(ap)
struct vop_readdir_args /* {
struct vnode *a_vp;
struct uio *a_uio;
struct ucred *a_cred;
int *a_ncookies;
u_int **cookies;
} */ *ap;
{
register struct vnode *vp = ap->a_vp;
register struct hpfsnode *hp = VTOHP(vp);
struct hpfsmount *hpmp = hp->h_hpmp;
struct uio *uio = ap->a_uio;
int ncookies = 0, i, num, cnum;
int error = 0;
off_t off;
struct buf *bp;
struct dirblk *dp;
struct hpfsdirent *dep;
lsn_t olsn;
lsn_t lsn;
int level;
dprintf(("hpfs_readdir(0x%x, 0x%x, 0x%x): ",hp->h_no,(u_int32_t)uio->uio_offset,uio->uio_resid));
off = uio->uio_offset;
if( uio->uio_offset < sizeof(struct dirent) ) {
dprintf((". faked, "));
hpfs_de_dot.d_fileno = hp->h_no;
error = uiomove((char *)&hpfs_de_dot,sizeof(struct dirent),uio);
if(error) {
return (error);
}
ncookies ++;
}
if( uio->uio_offset < 2 * sizeof(struct dirent) ) {
dprintf((".. faked, "));
hpfs_de_dotdot.d_fileno = hp->h_fn.fn_parent;
error = uiomove((char *)&hpfs_de_dotdot, sizeof(struct dirent),
uio);
if(error) {
return (error);
}
ncookies ++;
}
num = uio->uio_offset / sizeof(struct dirent) - 2;
cnum = 0;
lsn = ((alleaf_t *)hp->h_fn.fn_abd)->al_lsn;
olsn = 0;
level = 1;
dive:
dprintf(("[dive 0x%x] ", lsn));
error = bread(hp->h_devvp, lsn, D_BSIZE, NOCRED, &bp);
if (error) {
brelse(bp);
return (error);
}
dp = (struct dirblk *) bp->b_data;
if (dp->d_magic != D_MAGIC) {
printf("hpfs_readdir: MAGIC DOESN'T MATCH\n");
brelse(bp);
return (EINVAL);
}
dep = D_DIRENT(dp);
if (olsn) {
dprintf(("[restore 0x%x] ", olsn));
while(!(dep->de_flag & DE_END) ) {
if((dep->de_flag & DE_DOWN) &&
(olsn == DE_DOWNLSN(dep)))
break;
dep = (hpfsdirent_t *)((caddr_t)dep + dep->de_reclen);
}
if((dep->de_flag & DE_DOWN) && (olsn == DE_DOWNLSN(dep))) {
if (dep->de_flag & DE_END)
goto blockdone;
if (!(dep->de_flag & DE_SPECIAL)) {
if (num <= cnum) {
if (uio->uio_resid < sizeof(struct dirent)) {
brelse(bp);
dprintf(("[resid] "));
goto readdone;
}
error = hpfs_de_uiomove(hpmp, dep, uio);
if (error) {
brelse (bp);
return (error);
}
ncookies++;
if (uio->uio_resid < sizeof(struct dirent)) {
brelse(bp);
dprintf(("[resid] "));
goto readdone;
}
}
cnum++;
}
dep = (hpfsdirent_t *)((caddr_t)dep + dep->de_reclen);
} else {
printf("hpfs_readdir: ERROR! oLSN not found\n");
brelse(bp);
return (EINVAL);
}
}
olsn = 0;
while(!(dep->de_flag & DE_END)) {
if(dep->de_flag & DE_DOWN) {
lsn = DE_DOWNLSN(dep);
brelse(bp);
level++;
goto dive;
}
if (!(dep->de_flag & DE_SPECIAL)) {
if (num <= cnum) {
if (uio->uio_resid < sizeof(struct dirent)) {
brelse(bp);
dprintf(("[resid] "));
goto readdone;
}
error = hpfs_de_uiomove(hpmp, dep, uio);
if (error) {
brelse (bp);
return (error);
}
ncookies++;
if (uio->uio_resid < sizeof(struct dirent)) {
brelse(bp);
dprintf(("[resid] "));
goto readdone;
}
}
cnum++;
}
dep = (hpfsdirent_t *)((caddr_t)dep + dep->de_reclen);
}
if(dep->de_flag & DE_DOWN) {
dprintf(("[enddive] "));
lsn = DE_DOWNLSN(dep);
brelse(bp);
level++;
goto dive;
}
blockdone:
dprintf(("[EOB] "));
olsn = lsn;
lsn = dp->d_parent;
brelse(bp);
level--;
dprintf(("[level %d] ", level));
if (level > 0)
goto dive; /* undive really */
if (ap->a_eofflag) {
dprintf(("[EOF] "));
*ap->a_eofflag = 1;
}
readdone:
dprintf(("[readdone]\n"));
if (!error && ap->a_ncookies != NULL) {
struct dirent* dpStart;
struct dirent* dp;
u_long *cookies;
u_long *cookiep;
dprintf(("%d cookies, ",ncookies));
if (uio->uio_segflg != UIO_SYSSPACE || uio->uio_iovcnt != 1)
panic("hpfs_readdir: unexpected uio from NFS server");
dpStart = (struct dirent *)
((caddr_t)uio->uio_iov->iov_base -
(uio->uio_offset - off));
MALLOC(cookies, u_long *, ncookies * sizeof(u_long),
M_TEMP, M_WAITOK);
for (dp = dpStart, cookiep = cookies, i=0;
i < ncookies;
dp = (struct dirent *)((caddr_t) dp + dp->d_reclen), i++) {
off += dp->d_reclen;
*cookiep++ = (u_int) off;
}
*ap->a_ncookies = ncookies;
*ap->a_cookies = cookies;
}
return (0);
}
int
hpfs_lookup(ap)
struct vop_cachedlookup_args /* {
struct vnode *a_dvp;
struct vnode **a_vpp;
struct componentname *a_cnp;
} */ *ap;
{
register struct vnode *dvp = ap->a_dvp;
register struct hpfsnode *dhp = VTOHP(dvp);
struct hpfsmount *hpmp = dhp->h_hpmp;
struct componentname *cnp = ap->a_cnp;
struct ucred *cred = cnp->cn_cred;
int error;
int nameiop = cnp->cn_nameiop;
int flags = cnp->cn_flags;
int lockparent = flags & LOCKPARENT;
#if HPFS_DEBUG
int wantparent = flags & (LOCKPARENT|WANTPARENT);
#endif
dprintf(("hpfs_lookup(0x%x, %s, %ld, %d, %d): \n",
dhp->h_no, cnp->cn_nameptr, cnp->cn_namelen,
lockparent, wantparent));
if (nameiop != CREATE && nameiop != DELETE && nameiop != LOOKUP) {
printf("hpfs_lookup: LOOKUP, DELETE and CREATE are only supported\n");
return (EOPNOTSUPP);
}
error = VOP_ACCESS(dvp, VEXEC, cred, cnp->cn_thread);
if(error)
return (error);
if( (cnp->cn_namelen == 1) &&
!strncmp(cnp->cn_nameptr,".",1) ) {
dprintf(("hpfs_lookup(0x%x,...): . faked\n",dhp->h_no));
VREF(dvp);
*ap->a_vpp = dvp;
return (0);
} else if( (cnp->cn_namelen == 2) &&
!strncmp(cnp->cn_nameptr,"..",2) && (flags & ISDOTDOT) ) {
dprintf(("hpfs_lookup(0x%x,...): .. faked (0x%x)\n",
dhp->h_no, dhp->h_fn.fn_parent));
if (VFS_VGET(hpmp->hpm_mp, dhp->h_fn.fn_parent,
LK_NOWAIT | LK_EXCLUSIVE, ap->a_vpp)) {
VOP_UNLOCK(dvp,0,cnp->cn_thread);
error = VFS_VGET(hpmp->hpm_mp,
dhp->h_fn.fn_parent, LK_EXCLUSIVE, ap->a_vpp);
VOP_LOCK(dvp, 0, cnp->cn_thread);
if(error)
return(error);
}
if (!lockparent || !(flags & ISLASTCN))
VOP_UNLOCK(dvp,0,cnp->cn_thread);
return (0);
} else {
struct buf *bp;
struct hpfsdirent *dep;
struct hpfsnode *hp;
error = hpfs_genlookupbyname(dhp,
cnp->cn_nameptr, cnp->cn_namelen, &bp, &dep);
if (error) {
if ((error == ENOENT) && (flags & ISLASTCN) &&
(nameiop == CREATE || nameiop == RENAME)) {
if(!lockparent)
VOP_UNLOCK(dvp, 0, cnp->cn_thread);
cnp->cn_flags |= SAVENAME;
return (EJUSTRETURN);
}
return (error);
}
dprintf(("hpfs_lookup: fnode: 0x%x, CPID: 0x%x\n",
dep->de_fnode, dep->de_cpid));
if (nameiop == DELETE && (flags & ISLASTCN)) {
error = VOP_ACCESS(dvp, VWRITE, cred, cnp->cn_thread);
if (error) {
brelse(bp);
return (error);
}
}
if (dhp->h_no == dep->de_fnode) {
brelse(bp);
VREF(dvp);
*ap->a_vpp = dvp;
return (0);
}
error = VFS_VGET(hpmp->hpm_mp, dep->de_fnode, LK_EXCLUSIVE,
ap->a_vpp);
if (error) {
printf("hpfs_lookup: VFS_VGET FAILED %d\n", error);
brelse(bp);
return(error);
}
hp = VTOHP(*ap->a_vpp);
hp->h_mtime = dep->de_mtime;
hp->h_ctime = dep->de_ctime;
hp->h_atime = dep->de_atime;
bcopy(dep->de_name, hp->h_name, dep->de_namelen);
hp->h_name[dep->de_namelen] = '\0';
hp->h_namelen = dep->de_namelen;
hp->h_flag |= H_PARVALID;
brelse(bp);
if(!lockparent || !(flags & ISLASTCN))
VOP_UNLOCK(dvp, 0, cnp->cn_thread);
if ((flags & MAKEENTRY) &&
(!(flags & ISLASTCN) ||
(nameiop != DELETE && nameiop != CREATE)))
cache_enter(dvp, *ap->a_vpp, cnp);
}
return (error);
}
int
hpfs_remove(ap)
struct vop_remove_args /* {
struct vnode *a_dvp;
struct vnode *a_vp;
struct componentname *a_cnp;
} */ *ap;
{
int error;
dprintf(("hpfs_remove(0x%x, %s, %ld): \n", VTOHP(ap->a_vp)->h_no,
ap->a_cnp->cn_nameptr, ap->a_cnp->cn_namelen));
if (ap->a_vp->v_type == VDIR)
return (EPERM);
error = hpfs_removefnode (ap->a_dvp, ap->a_vp, ap->a_cnp);
return (error);
}
int
hpfs_create(ap)
struct vop_create_args /* {
struct vnode *a_dvp;
struct vnode **a_vpp;
struct componentname *a_cnp;
struct vattr *a_vap;
} */ *ap;
{
int error;
dprintf(("hpfs_create(0x%x, %s, %ld): \n", VTOHP(ap->a_dvp)->h_no,
ap->a_cnp->cn_nameptr, ap->a_cnp->cn_namelen));
if (!(ap->a_cnp->cn_flags & HASBUF))
panic ("hpfs_create: no name\n");
error = hpfs_makefnode (ap->a_dvp, ap->a_vpp, ap->a_cnp, ap->a_vap);
return (error);
}
/*
* Return POSIX pathconf information applicable to NTFS filesystem
*/
int
hpfs_pathconf(ap)
struct vop_pathconf_args /* {
struct vnode *a_vp;
int a_name;
register_t *a_retval;
} */ *ap;
{
switch (ap->a_name) {
case _PC_LINK_MAX:
*ap->a_retval = 1;
return (0);
case _PC_NAME_MAX:
*ap->a_retval = HPFS_MAXFILENAME;
return (0);
case _PC_PATH_MAX:
*ap->a_retval = PATH_MAX;
return (0);
case _PC_CHOWN_RESTRICTED:
*ap->a_retval = 1;
return (0);
case _PC_NO_TRUNC:
*ap->a_retval = 0;
return (0);
default:
return (EINVAL);
}
/* NOTREACHED */
}
/*
* Global vfs data structures
*/
struct vop_vector hpfs_vnodeops = {
.vop_default = &default_vnodeops,
.vop_access = hpfs_access,
.vop_bmap = hpfs_bmap,
.vop_cachedlookup = hpfs_lookup,
.vop_close = hpfs_close,
.vop_create = hpfs_create,
.vop_fsync = hpfs_fsync,
.vop_getattr = hpfs_getattr,
.vop_inactive = hpfs_inactive,
.vop_ioctl = hpfs_ioctl,
.vop_lookup = vfs_cache_lookup,
.vop_open = hpfs_open,
.vop_pathconf = hpfs_pathconf,
.vop_print = hpfs_print,
.vop_read = hpfs_read,
.vop_readdir = hpfs_readdir,
.vop_reclaim = hpfs_reclaim,
.vop_remove = hpfs_remove,
.vop_setattr = hpfs_setattr,
.vop_strategy = hpfs_strategy,
.vop_write = hpfs_write,
};
Reference in New Issue View Git Blame Copy Permalink