PERFORCE change 100287 for review
John Baldwin
jhb at FreeBSD.org
Thu Jun 29 14:39:38 UTC 2006
http://perforce.freebsd.org/chv.cgi?CH=100287
Change 100287 by jhb at jhb_mutex on 2006/06/29 14:05:23
IFC @100285.
Affected files ...
.. //depot/projects/smpng/sys/kern/sysv_sem.c#38 integrate
Differences ...
==== //depot/projects/smpng/sys/kern/sysv_sem.c#38 (text+ko) ====
@@ -37,7 +37,7 @@
*/
#include <sys/cdefs.h>
-__FBSDID("$FreeBSD: src/sys/kern/sysv_sem.c,v 1.80 2006/06/27 18:28:50 jhb Exp $");
+__FBSDID("$FreeBSD: src/sys/kern/sysv_sem.c,v 1.81 2006/06/29 13:58:36 jhb Exp $");
#include "opt_sysvipc.h"
#include "opt_mac.h"
@@ -591,6 +591,7 @@
struct semid_kernel *semakptr;
struct mtx *sema_mtxp;
u_short usval, count;
+ int semidx;
DPRINTF(("call to semctl(%d, %d, %d, 0x%x)\n",
semid, semnum, cmd, arg));
@@ -601,6 +602,10 @@
switch(cmd) {
case SEM_STAT:
+ /*
+ * For this command we assume semid is an array index
+ * rather than an IPC id.
+ */
if (semid < 0 || semid >= seminfo.semmni)
return (EINVAL);
semakptr = &sema[semid];
@@ -632,12 +637,12 @@
return (error);
}
- semid = IPCID_TO_IX(semid);
- if (semid < 0 || semid >= seminfo.semmni)
+ semidx = IPCID_TO_IX(semid);
+ if (semidx < 0 || semidx >= seminfo.semmni)
return (EINVAL);
- semakptr = &sema[semid];
- sema_mtxp = &sema_mtx[semid];
+ semakptr = &sema[semidx];
+ sema_mtxp = &sema_mtx[semidx];
#ifdef MAC
mtx_lock(sema_mtxp);
error = mac_check_sysv_semctl(cred, semakptr, cmd);
@@ -674,7 +679,7 @@
mac_cleanup_sysv_sem(semakptr);
#endif
SEMUNDO_LOCK();
- semundo_clear(semid, -1);
+ semundo_clear(semidx, -1);
SEMUNDO_UNLOCK();
wakeup(semakptr);
break;
@@ -804,7 +809,7 @@
}
semakptr->u.sem_base[semnum].semval = arg->val;
SEMUNDO_LOCK();
- semundo_clear(semid, semnum);
+ semundo_clear(semidx, semnum);
SEMUNDO_UNLOCK();
wakeup(semakptr);
break;
@@ -847,7 +852,7 @@
semakptr->u.sem_base[i].semval = usval;
}
SEMUNDO_LOCK();
- semundo_clear(semid, -1);
+ semundo_clear(semidx, -1);
SEMUNDO_UNLOCK();
wakeup(semakptr);
break;
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