Differential D25088 Diff 73086 head/sys/kern/vfs_mount.c

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head/sys/kern/vfs_mount.c

Show First 20 Lines • Show All 1,035 Lines • ▼ Show 20 Lines
vfs_domount_update(		vfs_domount_update(
struct thread td, / Calling thread. */		struct thread td, / Calling thread. */
struct vnode vp, / Mount point vnode. */		struct vnode vp, / Mount point vnode. */
uint64_t fsflags, /* Flags common to all filesystems. */		uint64_t fsflags, /* Flags common to all filesystems. */
struct vfsoptlist *optlist / Options local to the filesystem. */		struct vfsoptlist *optlist / Options local to the filesystem. */
)		)
{		{
struct export_args export;		struct export_args export;
		struct o2export_args o2export;
struct vnode *rootvp;		struct vnode *rootvp;
void *bufp;		void *bufp;
struct mount *mp;		struct mount *mp;
int error, export_error, len;		int error, export_error, i, len;
uint64_t flag;		uint64_t flag;
		gid_t *grps;

ASSERT_VOP_ELOCKED(vp, __func__);		ASSERT_VOP_ELOCKED(vp, __func__);
KASSERT((fsflags & MNT_UPDATE) != 0, ("MNT_UPDATE should be here"));		KASSERT((fsflags & MNT_UPDATE) != 0, ("MNT_UPDATE should be here"));
mp = vp->v_mount;		mp = vp->v_mount;

if ((vp->v_vflag & VV_ROOT) == 0) {		if ((vp->v_vflag & VV_ROOT) == 0) {
if (vfs_copyopt(*optlist, "export", &export, sizeof(export))		if (vfs_copyopt(*optlist, "export", &export, sizeof(export))
== 0)		== 0)
▲ Show 20 Lines • Show All 66 Lines • ▼ Show 20 Lines	vfs_domount_update(

export_error = 0;		export_error = 0;
/* Process the export option. */		/* Process the export option. */
if (error == 0 && vfs_getopt(mp->mnt_optnew, "export", &bufp,		if (error == 0 && vfs_getopt(mp->mnt_optnew, "export", &bufp,
&len) == 0) {		&len) == 0) {
/* Assume that there is only 1 ABI for each length. */		/* Assume that there is only 1 ABI for each length. */
switch (len) {		switch (len) {
case (sizeof(struct oexport_args)):		case (sizeof(struct oexport_args)):
bzero(&export, sizeof(export));		bzero(&o2export, sizeof(o2export));
		o2export.ex_numsecflavors = 1;
		o2export.ex_secflavors[0] = AUTH_SYS;
/* FALLTHROUGH */		/* FALLTHROUGH */
		case (sizeof(o2export)):
		bcopy(bufp, &o2export, len);
		export.ex_flags = (uint64_t)o2export.ex_flags;
		export.ex_root = o2export.ex_root;
		export.ex_uid = o2export.ex_anon.cr_uid;
		export.ex_groups = NULL;
		export.ex_ngroups = o2export.ex_anon.cr_ngroups;
		if (export.ex_ngroups > 0) {
		if (export.ex_ngroups <= XU_NGROUPS) {
		export.ex_groups = malloc(
		export.ex_ngroups * sizeof(gid_t),
		M_TEMP, M_WAITOK);
		for (i = 0; i < export.ex_ngroups; i++)
		export.ex_groups[i] =
		o2export.ex_anon.cr_groups[i];
		} else
		export_error = EINVAL;
		} else if (export.ex_ngroups < 0)
		export_error = EINVAL;
		export.ex_addr = o2export.ex_addr;
		export.ex_addrlen = o2export.ex_addrlen;
		export.ex_mask = o2export.ex_mask;
		export.ex_masklen = o2export.ex_masklen;
		export.ex_indexfile = o2export.ex_indexfile;
		export.ex_numsecflavors = o2export.ex_numsecflavors;
		if (export.ex_numsecflavors < MAXSECFLAVORS) {
		for (i = 0; i < export.ex_numsecflavors; i++)
		export.ex_secflavors[i] =
		o2export.ex_secflavors[i];
		} else
		export_error = EINVAL;
		if (export_error == 0)
		export_error = vfs_export(mp, &export);
		free(export.ex_groups, M_TEMP);
		break;
case (sizeof(export)):		case (sizeof(export)):
bcopy(bufp, &export, len);		bcopy(bufp, &export, len);
		grps = NULL;
		if (export.ex_ngroups > 0) {
		if (export.ex_ngroups <= NGROUPS_MAX) {
		grps = malloc(export.ex_ngroups *
		sizeof(gid_t), M_TEMP, M_WAITOK);
		export_error = copyin(export.ex_groups,
		grps, export.ex_ngroups *
		sizeof(gid_t));
		if (export_error == 0)
		export.ex_groups = grps;
		} else
		export_error = EINVAL;
		} else if (export.ex_ngroups == 0)
		export.ex_groups = NULL;
		else
		export_error = EINVAL;
		if (export_error == 0)
export_error = vfs_export(mp, &export);		export_error = vfs_export(mp, &export);
		free(grps, M_TEMP);
break;		break;
default:		default:
export_error = EINVAL;		export_error = EINVAL;
break;		break;
}		}
}		}

MNT_ILOCK(mp);		MNT_ILOCK(mp);
▲ Show 20 Lines • Show All 1,195 Lines • ▼ Show 20 Lines	if (cp == NULL)
break;		break;
vp = va_arg(ap, const void *);		vp = va_arg(ap, const void *);
ma = mount_arg(ma, cp, vp, (vp != NULL ? -1 : 0));		ma = mount_arg(ma, cp, vp, (vp != NULL ? -1 : 0));
}		}
va_end(ap);		va_end(ap);

error = kernel_mount(ma, flags);		error = kernel_mount(ma, flags);
return (error);		return (error);
}

/*
* Convert the old export args format into new export args.
*
* The old export args struct does not have security flavors. Otherwise, the
* structs are identical. The default security flavor 'sys' is applied when
* the given args export the filesystem.
*/
void
vfs_oexport_conv(const struct oexport_args oexp, struct export_args exp)
{

bcopy(oexp, exp, sizeof(*oexp));
if (exp->ex_flags & MNT_EXPORTED) {
exp->ex_numsecflavors = 1;
exp->ex_secflavors[0] = AUTH_SYS;
} else {
exp->ex_numsecflavors = 0;
}
}		}