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Ignore the statically configured vfs type numbers and assign vfs
type numbers in vfs attach order (modulo incomplete reuse of old numbers after vfs LKMs are unloaded). This requires reinitializing the sysctl tree (or at least the vfs subtree) for vfs's that support sysctls (currently only nfs). sysctl_order() already handled reinitialization reasonably except it checked for annulled self references in the wrong place. Fixed sysctls for vfs LKMs.
This commit is contained in:
Bruce Evans
parent
5f8d88ddd6
commit
e99ea9ec2b
6 changed files with 73 additions and 25 deletions
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@ -30,7 +30,7 @@
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $Id: kern_lkm.c,v 1.53 1998/08/10 14:27:34 bde Exp $
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* $Id: kern_lkm.c,v 1.54 1998/08/15 22:42:20 bde Exp $
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*/
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#include "opt_devfs.h"
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@ -44,6 +44,7 @@
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#include <sys/fcntl.h>
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#include <sys/kernel.h>
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#include <sys/mount.h>
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#include <sys/sysctl.h>
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#include <sys/sysent.h>
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#include <sys/exec.h>
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#include <sys/lkm.h>
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@ -78,6 +79,16 @@ static int lkm_state = LKMS_IDLE;
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static struct lkm_table lkmods[MAXLKMS]; /* table of loaded modules */
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static struct lkm_table *curp; /* global for in-progress ops */
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/*
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* XXX this bloat just exands the sysctl__vfs linker set a little so that
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* we can attach sysctls for VFS LKMs without expanding the linker set.
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* Currently (1998/09/06), only one VFS uses sysctls, so 2 extra linker
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* set slots are more than sufficient.
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*/
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extern struct linker_set sysctl__vfs;
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SYSCTL_INT(_vfs, OID_AUTO, lkm0, CTLFLAG_RD, &lkm_v, 0, "");
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SYSCTL_INT(_vfs, OID_AUTO, lkm1, CTLFLAG_RD, &lkm_v, 0, "");
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static int _lkm_dev __P((struct lkm_table *lkmtp, int cmd));
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static int _lkm_exec __P((struct lkm_table *lkmtp, int cmd));
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static int _lkm_vfs __P((struct lkm_table *lkmtp, int cmd));
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@ -600,6 +611,8 @@ _lkm_vfs(lkmtp, cmd)
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int cmd;
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{
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struct lkm_vfs *args = lkmtp->private.lkm_vfs;
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struct linker_set *l;
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struct sysctl_oid **oidpp;
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struct vfsconf *vfc = args->lkm_vfsconf;
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struct vfsconf *vfsp, *prev_vfsp;
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int i, maxtypenum;
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@ -617,14 +630,21 @@ _lkm_vfs(lkmtp, cmd)
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}
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}
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i = args->lkm_offset = vfc->vfc_typenum;
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if (i < 0) {
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i = maxvfsconf;
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args->lkm_offset = vfc->vfc_typenum = maxvfsconf++;
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if (vfc->vfc_vfsops->vfs_oid != NULL) {
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l = &sysctl__vfs;
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for (i = l->ls_length,
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oidpp = (struct sysctl_oid **)l->ls_items;
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i--; oidpp++) {
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if (!*oidpp || *oidpp == &sysctl___vfs_lkm0 ||
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*oidpp == &sysctl___vfs_lkm1) {
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*oidpp = vfc->vfc_vfsops->vfs_oid;
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(*oidpp)->oid_number = vfc->vfc_typenum;
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sysctl_order_all();
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break;
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}
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}
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}
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args->lkm_offset = vfc->vfc_typenum = i;
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if (maxvfsconf <= i)
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maxvfsconf = i + 1;
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vfsp->vfc_next = vfc;
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vfc->vfc_next = NULL;
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@ -665,6 +685,19 @@ _lkm_vfs(lkmtp, cmd)
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prev_vfsp->vfc_next = vfsp->vfc_next;
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if (vfsp->vfc_vfsops->vfs_oid != NULL) {
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l = &sysctl__vfs;
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for (i = l->ls_length,
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oidpp = (struct sysctl_oid **)l->ls_items;
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i--; oidpp++) {
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if (*oidpp == vfsp->vfc_vfsops->vfs_oid) {
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*oidpp = NULL;
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sysctl_order_all();
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break;
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}
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}
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}
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/*
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* Maintain maxvfsconf.
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*/
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@ -37,7 +37,7 @@
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* SUCH DAMAGE.
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*
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* @(#)kern_sysctl.c 8.4 (Berkeley) 4/14/94
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* $Id: kern_sysctl.c,v 1.75 1998/08/24 08:39:38 dfr Exp $
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* $Id: kern_sysctl.c,v 1.76 1998/09/05 14:30:10 bde Exp $
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*/
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#include "opt_compat.h"
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@ -100,11 +100,13 @@ sysctl_order(void *arg)
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j = l->ls_length;
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oidpp = (struct sysctl_oid **) l->ls_items;
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for (k = 0; j--; oidpp++) {
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if (!*oidpp)
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continue;
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if ((*oidpp)->oid_arg1 == arg) {
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*oidpp = 0;
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continue;
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}
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if (*oidpp && (*oidpp)->oid_number > k)
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if ((*oidpp)->oid_number > k)
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k = (*oidpp)->oid_number;
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}
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@ -132,6 +134,12 @@ sysctl_order(void *arg)
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SYSINIT(sysctl, SI_SUB_KMEM, SI_ORDER_ANY, sysctl_order, &sysctl_);
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void
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sysctl_order_all(void)
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{
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sysctl_order(&sysctl_);
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}
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/*
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* "Staff-functions"
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*
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@ -36,7 +36,7 @@
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* SUCH DAMAGE.
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*
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* @(#)vfs_init.c 8.3 (Berkeley) 1/4/94
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* $Id: vfs_init.c,v 1.31 1997/10/26 20:26:33 phk Exp $
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* $Id: vfs_init.c,v 1.32 1998/02/09 06:09:33 eivind Exp $
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*/
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@ -44,6 +44,7 @@
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/mount.h>
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#include <sys/sysctl.h>
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#include <sys/vnode.h>
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#include <sys/malloc.h>
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#include <vm/vm_zone.h>
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@ -228,7 +229,7 @@ static void
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vfsinit(dummy)
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void *dummy;
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{
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struct vfsconf **vfc;
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struct vfsconf **vfc, *vfsp;
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int maxtypenum;
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namei_zone = zinit("NAMEI", MAXPATHLEN, 0, 0, 2);
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@ -252,14 +253,15 @@ vfsinit(dummy)
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vattr_null(&va_null);
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maxtypenum = 0;
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vfc = (struct vfsconf **)vfs_set.ls_items;
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vfsconf = *vfc; /* simulate Lite2 vfsconf array */
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while (*vfc) {
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struct vfsconf *vfsp = *vfc;
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vfc++;
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vfsp->vfc_next = *vfc;
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if (maxtypenum <= vfsp->vfc_typenum)
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maxtypenum = vfsp->vfc_typenum + 1;
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vfsconf = *vfc;
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for (; *vfc != NULL; maxtypenum++, vfc++) {
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vfsp = *vfc;
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vfsp->vfc_next = *(vfc + 1);
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vfsp->vfc_typenum = maxtypenum;
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if (vfsp->vfc_vfsops->vfs_oid != NULL) {
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vfsp->vfc_vfsops->vfs_oid->oid_number = maxtypenum;
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sysctl_order_all();
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}
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(*vfsp->vfc_vfsops->vfs_init)(vfsp);
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}
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/* next vfc_typenum to be used */
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@ -34,7 +34,7 @@
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* SUCH DAMAGE.
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*
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* @(#)nfs_vfsops.c 8.12 (Berkeley) 5/20/95
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* $Id: nfs_vfsops.c,v 1.72 1998/06/07 17:12:30 dfr Exp $
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* $Id: nfs_vfsops.c,v 1.73 1998/08/12 20:17:42 bde Exp $
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*/
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#include <sys/param.h>
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@ -131,7 +131,9 @@ static struct vfsops nfs_vfsops = {
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nfs_vget,
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nfs_fhtovp,
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nfs_vptofh,
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nfs_init
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nfs_init,
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0,
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&sysctl___vfs_nfs
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};
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VFS_SET(nfs_vfsops, nfs, MOUNT_NFS, VFCF_NETWORK);
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@ -34,7 +34,7 @@
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* SUCH DAMAGE.
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*
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* @(#)nfs_vfsops.c 8.12 (Berkeley) 5/20/95
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* $Id: nfs_vfsops.c,v 1.72 1998/06/07 17:12:30 dfr Exp $
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* $Id: nfs_vfsops.c,v 1.73 1998/08/12 20:17:42 bde Exp $
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*/
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#include <sys/param.h>
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@ -131,7 +131,9 @@ static struct vfsops nfs_vfsops = {
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nfs_vget,
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nfs_fhtovp,
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nfs_vptofh,
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nfs_init
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nfs_init,
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0,
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&sysctl___vfs_nfs
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};
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VFS_SET(nfs_vfsops, nfs, MOUNT_NFS, VFCF_NETWORK);
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@ -34,7 +34,7 @@
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* SUCH DAMAGE.
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*
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* @(#)sysctl.h 8.1 (Berkeley) 6/2/93
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* $Id: sysctl.h,v 1.63 1998/09/05 12:42:56 bde Exp $
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* $Id: sysctl.h,v 1.64 1998/09/05 14:13:35 bde Exp $
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*/
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#ifndef _SYS_SYSCTL_H_
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@ -463,6 +463,7 @@ extern char ostype[];
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int kernel_sysctl(struct proc *p, int *name, u_int namelen, void *old,
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size_t *oldlenp, void *new, size_t newlen,
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size_t *retval);
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void sysctl_order_all(void);
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int userland_sysctl(struct proc *p, int *name, u_int namelen, void *old,
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size_t *oldlenp, int inkernel, void *new, size_t newlen,
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size_t *retval);
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