Aren
/
NetBSD
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

allow modules to be loaded only if device is open for writing

This commit is contained in:
cgd 1993-06-07 23:10:09 +00:00
parent 57d3a6d525
commit 77e24b59b2
1 changed files with 17 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

18
sys/kern/kern_lkm.c
View File

@ -36,7 +36,7 @@
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id: kern_lkm.c,v 1.1 1993/06/07 19:52:39 cgd Exp $
* $Id: kern_lkm.c,v 1.2 1993/06/07 23:10:09 cgd Exp $
*/
#include "param.h"
@ -183,6 +183,8 @@ int flag;
switch( cmd) {
case LMRESERV: /* reserve pages for a module*/
if ((flag & FWRITE) == 0) /* only allow this if writing */
return EPERM;
resrvp = (struct lmc_resrv *)data;
@ -222,6 +224,9 @@ int flag;
break;
case LMLOADBUF: /* Copy in; stateful, follows LMRESERV*/
if ((flag & FWRITE) == 0) /* only allow this if writing */
return EPERM;
loadbufp = (struct lmc_loadbuf *)data;
if( lkm_state != LKMS_RESERVED && lkm_state != LKMS_LOADING) {
err = ENOMEM;
@ -251,6 +256,9 @@ int flag;
break;
case LMUNRESRV: /* discard reserved pages for a module*/
if ((flag & FWRITE) == 0) /* only allow this if writing */
return EPERM;
lkmunreserve(); /* coerce state to LKM_IDLE*/
#ifdef DEBUG
printf( "LKM: LMUNRESERV\n");
@ -258,6 +266,9 @@ int flag;
break;
case LMREADY: /* module loaded: call entry*/
if ((flag & FWRITE) == 0) /* only allow this if writing */
return EPERM;
if( lkm_state != LKMS_LOADED) {
#ifdef DEBUG
@ -289,6 +300,9 @@ int flag;
break;
case LMUNLOAD: /* unload a module*/
if ((flag & FWRITE) == 0) /* only allow this if writing */
return EPERM;
unloadp = (struct lmc_unload *)data;
if( ( i = unloadp->id) == -1) { /* unload by name*/
@ -332,6 +346,8 @@ int flag;
break;
case LMSTAT: /* stat a module by id/name*/
/* allow readers and writers to stat */
statp = (struct lmc_stat *)data;
if( ( i = statp->id) == -1) { /* stat by name*/