freebsd-skq/sys/fs/hpfs/hpfs_vfsops.c
attilio 1dcb84131b Remove the thread argument from the FSD (File-System Dependent) parts of
the VFS.  Now all the VFS_* functions and relating parts don't want the
context as long as it always refers to curthread.

In some points, in particular when dealing with VOPs and functions living
in the same namespace (eg. vflush) which still need to be converted,
pass curthread explicitly in order to retain the old behaviour.
Such loose ends will be fixed ASAP.

While here fix a bug: now, UFS_EXTATTR can be compiled alone without the
UFS_EXTATTR_AUTOSTART option.

VFS KPI is heavilly changed by this commit so thirdy parts modules needs
to be recompiled.  Bump __FreeBSD_version in order to signal such
situation.
2009-05-11 15:33:26 +00:00

543 lines
12 KiB
C

/*-
* 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/namei.h>
#include <sys/conf.h>
#include <sys/proc.h>
#include <sys/kernel.h>
#include <sys/vnode.h>
#include <sys/mount.h>
#include <sys/bio.h>
#include <sys/buf.h>
#include <sys/fcntl.h>
#include <sys/malloc.h>
#include <geom/geom.h>
#include <geom/geom_vfs.h>
#include <vm/vm.h>
#include <vm/vm_param.h>
#include <vm/vm_page.h>
#include <vm/vm_object.h>
#include <vm/vm_extern.h>
#include <fs/hpfs/hpfs.h>
#include <fs/hpfs/hpfsmount.h>
#include <fs/hpfs/hpfs_subr.h>
MALLOC_DEFINE(M_HPFSMNT, "hpfs_mount", "HPFS mount structure");
MALLOC_DEFINE(M_HPFSNO, "hpfs_node", "HPFS node structure");
struct sockaddr;
static int hpfs_mountfs(register struct vnode *, struct mount *,
struct thread *);
static vfs_fhtovp_t hpfs_fhtovp;
static vfs_vget_t hpfs_vget;
static vfs_cmount_t hpfs_cmount;
static vfs_mount_t hpfs_mount;
static vfs_root_t hpfs_root;
static vfs_statfs_t hpfs_statfs;
static vfs_unmount_t hpfs_unmount;
static int
hpfs_cmount (
struct mntarg *ma,
void *data,
int flags)
{
struct hpfs_args args;
int error;
error = copyin(data, (caddr_t)&args, sizeof (struct hpfs_args));
if (error)
return (error);
ma = mount_argsu(ma, "from", args.fspec, MAXPATHLEN);
ma = mount_arg(ma, "export", &args.export, sizeof args.export);
ma = mount_argf(ma, "uid", "%d", args.uid);
ma = mount_argf(ma, "gid", "%d", args.gid);
ma = mount_argf(ma, "mode", "%d", args.mode);
if (args.flags & HPFSMNT_TABLES) {
ma = mount_arg(ma, "d2u", args.d2u, sizeof args.d2u);
ma = mount_arg(ma, "u2d", args.u2d, sizeof args.u2d);
}
error = kernel_mount(ma, flags);
return (error);
}
static const char *hpfs_opts[] = {
"from", "export", "uid", "gid", "mode", "d2u", "u2d", NULL
};
static int
hpfs_mount (struct mount *mp)
{
int err = 0, error;
struct vnode *devvp;
struct thread *td;
struct nameidata ndp;
struct export_args export;
char *from;
td = curthread;
dprintf(("hpfs_omount():\n"));
/*
***
* Mounting non-root filesystem or updating a filesystem
***
*/
if (vfs_filteropt(mp->mnt_optnew, hpfs_opts))
return (EINVAL);
from = vfs_getopts(mp->mnt_optnew, "from", &error);
if (error)
return (error);
/*
* If updating, check whether changing from read-only to
* read/write; if there is no device name, that's all we do.
*/
if (mp->mnt_flag & MNT_UPDATE) {
dprintf(("hpfs_omount: MNT_UPDATE: "));
if (from == NULL) {
error = vfs_copyopt(mp->mnt_optnew, "export",
&export, sizeof export);
if (error)
return (error);
dprintf(("export 0x%x\n",args.export.ex_flags));
err = vfs_export(mp, &export);
if (err) {
printf("hpfs_omount: vfs_export failed %d\n",
err);
}
goto success;
} else {
dprintf(("name [FAILED]\n"));
err = EINVAL;
goto success;
}
dprintf(("\n"));
}
/*
* Not an update, or updating the name: look up the name
* and verify that it refers to a sensible block device.
*/
NDINIT(&ndp, LOOKUP, FOLLOW | LOCKLEAF, UIO_SYSSPACE, from, td);
err = namei(&ndp);
if (err) {
/* can't get devvp!*/
goto error_1;
}
devvp = ndp.ni_vp;
if (!vn_isdisk(devvp, &err)) {
vput(devvp);
return (err);
}
/*
********************
* NEW MOUNT
********************
*/
/*
* Since this is a new mount, we want the names for
* the device and the mount point copied in. If an
* error occurs, the mountpoint is discarded by the
* upper level code. Note that vfs_omount() handles
* copying the mountpoint f_mntonname for us, so we
* don't have to do it here unless we want to set it
* to something other than "path" for some rason.
*/
/* Save "mounted from" info for mount point (NULL pad)*/
vfs_mountedfrom(mp, from);
err = hpfs_mountfs(devvp, mp, td);
if (err) {
vrele(devvp);
goto error_1;
}
goto success;
error_1: /* no state to back out*/
/* XXX: Missing NDFREE(&ndp, ...) */
success:
return( err);
}
/*
* Common code for mount and mountroot
*/
int
hpfs_mountfs(devvp, mp, td)
register struct vnode *devvp;
struct mount *mp;
struct thread *td;
{
int error, ronly, v;
struct sublock *sup;
struct spblock *spp;
struct hpfsmount *hpmp;
struct buf *bp = NULL;
struct vnode *vp;
struct cdev *dev = devvp->v_rdev;
struct g_consumer *cp;
struct bufobj *bo;
if (mp->mnt_flag & MNT_ROOTFS)
return (EOPNOTSUPP);
dprintf(("hpfs_mountfs():\n"));
ronly = (mp->mnt_flag & MNT_RDONLY) != 0;
/* XXX: use VOP_ACCESS to check FS perms */
DROP_GIANT();
g_topology_lock();
error = g_vfs_open(devvp, &cp, "hpfs", ronly ? 0 : 1);
g_topology_unlock();
PICKUP_GIANT();
VOP_UNLOCK(devvp, 0);
if (error)
return (error);
bo = &devvp->v_bufobj;
bo->bo_private = cp;
bo->bo_ops = g_vfs_bufops;
/*
* Do actual mount
*/
hpmp = malloc(sizeof(struct hpfsmount), M_HPFSMNT, M_WAITOK | M_ZERO);
hpmp->hpm_cp = cp;
hpmp->hpm_bo = bo;
/* Read in SuperBlock */
error = bread(devvp, SUBLOCK, SUSIZE, NOCRED, &bp);
if (error)
goto failed;
bcopy(bp->b_data, &hpmp->hpm_su, sizeof(struct sublock));
brelse(bp); bp = NULL;
/* Read in SpareBlock */
error = bread(devvp, SPBLOCK, SPSIZE, NOCRED, &bp);
if (error)
goto failed;
bcopy(bp->b_data, &hpmp->hpm_sp, sizeof(struct spblock));
brelse(bp); bp = NULL;
sup = &hpmp->hpm_su;
spp = &hpmp->hpm_sp;
/* Check magic */
if (sup->su_magic != SU_MAGIC) {
printf("hpfs_mountfs: SuperBlock MAGIC DOESN'T MATCH\n");
error = EINVAL;
goto failed;
}
if (spp->sp_magic != SP_MAGIC) {
printf("hpfs_mountfs: SpareBlock MAGIC DOESN'T MATCH\n");
error = EINVAL;
goto failed;
}
mp->mnt_data = hpmp;
hpmp->hpm_devvp = devvp;
hpmp->hpm_dev = devvp->v_rdev;
hpmp->hpm_mp = mp;
if (1 == vfs_scanopt(mp->mnt_optnew, "uid", "%d", &v))
hpmp->hpm_uid = v;
if (1 == vfs_scanopt(mp->mnt_optnew, "gid", "%d", &v))
hpmp->hpm_gid = v;
if (1 == vfs_scanopt(mp->mnt_optnew, "mode", "%d", &v))
hpmp->hpm_mode = v;
error = hpfs_bminit(hpmp);
if (error)
goto failed;
error = hpfs_cpinit(mp, hpmp);
if (error) {
hpfs_bmdeinit(hpmp);
goto failed;
}
error = hpfs_root(mp, LK_EXCLUSIVE, &vp);
if (error) {
hpfs_cpdeinit(hpmp);
hpfs_bmdeinit(hpmp);
goto failed;
}
vput(vp);
mp->mnt_stat.f_fsid.val[0] = (long)dev2udev(dev);
mp->mnt_stat.f_fsid.val[1] = mp->mnt_vfc->vfc_typenum;
mp->mnt_maxsymlinklen = 0;
MNT_ILOCK(mp);
mp->mnt_flag |= MNT_LOCAL;
MNT_IUNLOCK(mp);
return (0);
failed:
if (bp)
brelse (bp);
mp->mnt_data = NULL;
DROP_GIANT();
g_topology_lock();
g_vfs_close(cp);
g_topology_unlock();
PICKUP_GIANT();
return (error);
}
static int
hpfs_unmount(
struct mount *mp,
int mntflags)
{
int error, flags;
register struct hpfsmount *hpmp = VFSTOHPFS(mp);
dprintf(("hpfs_unmount():\n"));
flags = 0;
if(mntflags & MNT_FORCE)
flags |= FORCECLOSE;
dprintf(("hpfs_unmount: vflushing...\n"));
error = vflush(mp, 0, flags, curthread);
if (error) {
printf("hpfs_unmount: vflush failed: %d\n",error);
return (error);
}
vinvalbuf(hpmp->hpm_devvp, V_SAVE, 0, 0);
DROP_GIANT();
g_topology_lock();
g_vfs_close(hpmp->hpm_cp);
g_topology_unlock();
PICKUP_GIANT();
vrele(hpmp->hpm_devvp);
dprintf(("hpfs_umount: freeing memory...\n"));
hpfs_cpdeinit(hpmp);
hpfs_bmdeinit(hpmp);
mp->mnt_data = NULL;
MNT_ILOCK(mp);
mp->mnt_flag &= ~MNT_LOCAL;
MNT_IUNLOCK(mp);
free(hpmp, M_HPFSMNT);
return (0);
}
static int
hpfs_root(
struct mount *mp,
int flags,
struct vnode **vpp)
{
int error = 0;
struct hpfsmount *hpmp = VFSTOHPFS(mp);
dprintf(("hpfs_root():\n"));
error = VFS_VGET(mp, (ino_t)hpmp->hpm_su.su_rootfno, LK_EXCLUSIVE, vpp);
if(error) {
printf("hpfs_root: VFS_VGET failed: %d\n",error);
return (error);
}
return (error);
}
static int
hpfs_statfs(
struct mount *mp,
struct statfs *sbp)
{
struct hpfsmount *hpmp = VFSTOHPFS(mp);
dprintf(("hpfs_statfs(): HPFS%d.%d\n",
hpmp->hpm_su.su_hpfsver, hpmp->hpm_su.su_fnctver));
sbp->f_type = mp->mnt_vfc->vfc_typenum;
sbp->f_bsize = DEV_BSIZE;
sbp->f_iosize = DEV_BSIZE;
sbp->f_blocks = hpmp->hpm_su.su_btotal;
sbp->f_bfree = sbp->f_bavail = hpmp->hpm_bavail;
sbp->f_ffree = 0;
sbp->f_files = 0;
sbp->f_flags = mp->mnt_flag;
return (0);
}
/*ARGSUSED*/
static int
hpfs_fhtovp(
struct mount *mp,
struct fid *fhp,
struct vnode **vpp)
{
struct vnode *nvp;
struct hpfid *hpfhp = (struct hpfid *)fhp;
int error;
if ((error = VFS_VGET(mp, hpfhp->hpfid_ino, LK_EXCLUSIVE, &nvp)) != 0) {
*vpp = NULLVP;
return (error);
}
/* XXX as unlink/rmdir/mkdir/creat are not currently possible
* with HPFS, we don't need to check anything else for now */
*vpp = nvp;
return (0);
}
static int
hpfs_vget(
struct mount *mp,
ino_t ino,
int flags,
struct vnode **vpp)
{
struct hpfsmount *hpmp = VFSTOHPFS(mp);
struct vnode *vp;
struct hpfsnode *hp;
struct buf *bp;
int error;
dprintf(("hpfs_vget(0x%x): ",ino));
error = vfs_hash_get(mp, ino, flags, curthread, vpp, NULL, NULL);
if (error || *vpp != NULL)
return (error);
*vpp = NULL;
hp = NULL;
vp = NULL;
/*
* We have to lock node creation for a while,
* but then we have to call getnewvnode(),
* this may cause hpfs_reclaim() to be called,
* this may need to VOP_VGET() parent dir for
* update reasons, and if parent is not in
* hash, we have to lock node creation...
* To solve this, we MALLOC, getnewvnode and init while
* not locked (probability of node appearence
* at that time is little, and anyway - we'll
* check for it).
*/
hp = malloc(sizeof(struct hpfsnode),
M_HPFSNO, M_WAITOK);
error = getnewvnode("hpfs", mp, &hpfs_vnodeops, &vp);
if (error) {
printf("hpfs_vget: can't get new vnode\n");
free(hp, M_HPFSNO);
return (error);
}
dprintf(("prenew "));
vp->v_data = hp;
if (ino == (ino_t)hpmp->hpm_su.su_rootfno)
vp->v_vflag |= VV_ROOT;
mtx_init(&hp->h_interlock, "hpfsnode interlock", NULL, MTX_DEF);
hp->h_flag = H_INVAL;
hp->h_vp = vp;
hp->h_hpmp = hpmp;
hp->h_no = ino;
hp->h_dev = hpmp->hpm_dev;
hp->h_uid = hpmp->hpm_uid;
hp->h_gid = hpmp->hpm_uid;
hp->h_mode = hpmp->hpm_mode;
hp->h_devvp = hpmp->hpm_devvp;
lockmgr(vp->v_vnlock, LK_EXCLUSIVE, NULL);
error = insmntque(vp, mp);
if (error != 0) {
free(hp, M_HPFSNO);
return (error);
}
error = vfs_hash_insert(vp, ino, flags, curthread, vpp, NULL, NULL);
if (error || *vpp != NULL)
return (error);
error = bread(hpmp->hpm_devvp, ino, FNODESIZE, NOCRED, &bp);
if (error) {
printf("hpfs_vget: can't read ino %d\n",ino);
vput(vp);
return (error);
}
bcopy(bp->b_data, &hp->h_fn, sizeof(struct fnode));
brelse(bp);
if (hp->h_fn.fn_magic != FN_MAGIC) {
printf("hpfs_vget: MAGIC DOESN'T MATCH\n");
vput(vp);
return (EINVAL);
}
vp->v_type = hp->h_fn.fn_flag ? VDIR:VREG;
hp->h_flag &= ~H_INVAL;
*vpp = vp;
return (0);
}
static struct vfsops hpfs_vfsops = {
.vfs_fhtovp = hpfs_fhtovp,
.vfs_cmount = hpfs_cmount,
.vfs_mount = hpfs_mount,
.vfs_root = hpfs_root,
.vfs_statfs = hpfs_statfs,
.vfs_unmount = hpfs_unmount,
.vfs_vget = hpfs_vget,
};
VFS_SET(hpfs_vfsops, hpfs, 0);