/*
- * Copyright (c) 2000-2004 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2010 Apple Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
* Purged old history
* New version based on 4.4
*/
+/*
+ * NOTICE: This file was modified by SPARTA, Inc. in 2005 to introduce
+ * support for mandatory and extensible security protections. This notice
+ * is included in support of clause 2.2 (b) of the Apple Public License,
+ * Version 2.0.
+ */
#include <sys/param.h>
#include <sys/tty.h>
#include <sys/sysproto.h>
#include <machine/spl.h>
+#if CONFIG_MACF
+#include <security/mac_framework.h>
+#endif
/*
* The routines implemented in this file are described in:
* The former's operation is described in Leffler, et al., and the latter
* was provided by UCB with the 4.4BSD-Lite release
*/
-comp_t encode_comp_t(u_long, u_long);
+comp_t encode_comp_t(uint32_t, uint32_t);
void acctwatch(void *);
-void acctwatch_funnel(void *);
+void acct_init(void);
/*
* Accounting vnode pointer, and suspended accounting vnode pointer. States
int acctresume = 4; /* resume when free space risen to > 4% */
int acctchkfreq = 15; /* frequency (in seconds) to check space */
+
+static lck_grp_t *acct_subsys_lck_grp;
+static lck_mtx_t *acct_subsys_mutex;
+
+#define ACCT_SUBSYS_LOCK() lck_mtx_lock(acct_subsys_mutex)
+#define ACCT_SUBSYS_UNLOCK() lck_mtx_unlock(acct_subsys_mutex)
+
+void
+acct_init(void)
+{
+ acct_subsys_lck_grp = lck_grp_alloc_init("acct", NULL);
+ acct_subsys_mutex = lck_mtx_alloc_init(acct_subsys_lck_grp, NULL);
+}
+
+
/*
* Accounting system call. Written based on the specification and
* previous implementation done by Mark Tinguely.
*/
int
-acct(struct proc *p, struct acct_args *uap, __unused int *retval)
+acct(proc_t p, struct acct_args *uap, __unused int *retval)
{
struct nameidata nd;
int error;
- struct vfs_context context;
+ struct vfs_context *ctx;
- context.vc_proc = p;
- context.vc_ucred = kauth_cred_get();
+ ctx = vfs_context_current();
/* Make sure that the caller is root. */
- if ((error = suser(kauth_cred_get(), &p->p_acflag)))
+ if ((error = suser(vfs_context_ucred(ctx), &p->p_acflag)))
return (error);
/*
* writing and make sure it's a 'normal'.
*/
if (uap->path != USER_ADDR_NULL) {
- NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_USERSPACE, uap->path, &context);
+ NDINIT(&nd, LOOKUP, OP_OPEN, NOFOLLOW, UIO_USERSPACE, uap->path, ctx);
if ((error = vn_open(&nd, FWRITE, 0)))
return (error);
+#if CONFIG_MACF
+ error = mac_system_check_acct(vfs_context_ucred(ctx), nd.ni_vp);
+ if (error) {
+ vnode_put(nd.ni_vp);
+ vn_close(nd.ni_vp, FWRITE, ctx);
+ return (error);
+ }
+#endif
vnode_put(nd.ni_vp);
if (nd.ni_vp->v_type != VREG) {
- vn_close(nd.ni_vp, FWRITE, kauth_cred_get(), p);
+ vn_close(nd.ni_vp, FWRITE, ctx);
return (EACCES);
}
}
+#if CONFIG_MACF
+ else {
+ error = mac_system_check_acct(vfs_context_ucred(ctx), NULL);
+ if (error)
+ return (error);
+ }
+#endif
/*
* If accounting was previously enabled, kill the old space-watcher,
* close the file, and (if no new file was specified, leave).
*/
+ ACCT_SUBSYS_LOCK();
if (acctp != NULLVP || suspend_acctp != NULLVP) {
- untimeout(acctwatch_funnel, NULL);
- error = vn_close((acctp != NULLVP ? acctp : suspend_acctp), FWRITE,
- kauth_cred_get(), p);
+ untimeout(acctwatch, NULL);
+ error = vn_close((acctp != NULLVP ? acctp : suspend_acctp),
+ FWRITE, vfs_context_current());
acctp = suspend_acctp = NULLVP;
}
- if (uap->path == USER_ADDR_NULL)
+ if (uap->path == USER_ADDR_NULL) {
+ ACCT_SUBSYS_UNLOCK();
return (error);
+ }
/*
* Save the new accounting file vnode, and schedule the new
* free space watcher.
*/
acctp = nd.ni_vp;
+ ACCT_SUBSYS_UNLOCK();
+
acctwatch(NULL);
return (error);
}
* "acct.h" header file.)
*/
int
-acct_process(p)
- struct proc *p;
+acct_process(proc_t p)
{
struct acct an_acct;
- struct rusage *r;
+ struct rusage rup, *r;
struct timeval ut, st, tmp;
int t;
int error;
struct vnode *vp;
kauth_cred_t safecred;
+ struct session * sessp;
+ struct tty *tp;
/* If accounting isn't enabled, don't bother */
+ ACCT_SUBSYS_LOCK();
vp = acctp;
- if (vp == NULLVP)
+ if (vp == NULLVP) {
+ ACCT_SUBSYS_UNLOCK();
return (0);
+ }
/*
* Get process accounting information.
an_acct.ac_stime = encode_comp_t(st.tv_sec, st.tv_usec);
/* (3) The elapsed time the commmand ran (and its starting time) */
- an_acct.ac_btime = p->p_stats->p_start.tv_sec;
+ an_acct.ac_btime = p->p_start.tv_sec;
microtime(&tmp);
- timevalsub(&tmp, &p->p_stats->p_start);
+ timevalsub(&tmp, &p->p_start);
an_acct.ac_etime = encode_comp_t(tmp.tv_sec, tmp.tv_usec);
/* (4) The average amount of memory used */
- r = &p->p_stats->p_ru;
+ proc_lock(p);
+ rup = p->p_stats->p_ru;
+ proc_unlock(p);
+ r = &rup;
tmp = ut;
timevaladd(&tmp, &st);
t = tmp.tv_sec * hz + tmp.tv_usec / tick;
an_acct.ac_io = encode_comp_t(r->ru_inblock + r->ru_oublock, 0);
/* (6) The UID and GID of the process */
- an_acct.ac_uid = p->p_ucred->cr_ruid;
- an_acct.ac_gid = p->p_ucred->cr_rgid;
+ safecred = kauth_cred_proc_ref(p);
+
+ an_acct.ac_uid = kauth_cred_getruid(safecred);
+ an_acct.ac_gid = kauth_cred_getrgid(safecred);
/* (7) The terminal from which the process was started */
- if ((p->p_flag & P_CONTROLT) && p->p_pgrp->pg_session->s_ttyp)
- an_acct.ac_tty = p->p_pgrp->pg_session->s_ttyp->t_dev;
- else
+
+ sessp = proc_session(p);
+ if ((p->p_flag & P_CONTROLT) && (sessp != SESSION_NULL) && ((tp = SESSION_TP(sessp)) != TTY_NULL)) {
+ tty_lock(tp);
+ an_acct.ac_tty = tp->t_dev;
+ tty_unlock(tp);
+ }else
an_acct.ac_tty = NODEV;
+ if (sessp != SESSION_NULL)
+ session_rele(sessp);
+
/* (8) The boolean flags that tell how the process terminated, etc. */
an_acct.ac_flag = p->p_acflag;
- safecred = kauth_cred_proc_ref(p);
/*
* Now, just write the accounting information to the file.
*/
if ((error = vnode_getwithref(vp)) == 0) {
error = vn_rdwr(UIO_WRITE, vp, (caddr_t)&an_acct, sizeof (an_acct),
- (off_t)0, UIO_SYSSPACE32, IO_APPEND|IO_UNIT, safecred,
+ (off_t)0, UIO_SYSSPACE, IO_APPEND|IO_UNIT, safecred,
(int *)0, p);
vnode_put(vp);
}
+
kauth_cred_unref(&safecred);
+ ACCT_SUBSYS_UNLOCK();
+
return (error);
}
#define MAXFRACT ((1 << MANTSIZE) - 1) /* Maximum fractional value. */
comp_t
-encode_comp_t(s, us)
- u_long s, us;
+encode_comp_t(uint32_t s, uint32_t us)
{
int exp, rnd;
return (exp);
}
-void
-acctwatch_funnel(a)
- void *a;
-{
- thread_funnel_set(kernel_flock, TRUE);
- acctwatch(a);
- thread_funnel_set(kernel_flock, FALSE);
-}
-
-
/*
* Periodically check the file system to see if accounting
* should be turned on or off. Beware the case where the vnode
void
acctwatch(__unused void *a)
{
- struct vfs_context context;
+ vfs_context_t ctx = vfs_context_current();
struct vfs_attr va;
VFSATTR_INIT(&va);
VFSATTR_WANTED(&va, f_blocks);
VFSATTR_WANTED(&va, f_bavail);
- context.vc_proc = current_proc();
- context.vc_ucred = kauth_cred_get();
+ ACCT_SUBSYS_LOCK();
if (suspend_acctp != NULLVP) {
/*
* Resuming accounting when accounting is suspended, and the
* below a low watermark
*/
if (suspend_acctp->v_type == VBAD) {
- (void) vn_close(suspend_acctp, FWRITE, NOCRED, NULL);
+ (void) vn_close(suspend_acctp, FWRITE, vfs_context_kernel());
suspend_acctp = NULLVP;
+ ACCT_SUBSYS_UNLOCK();
return;
}
- (void)vfs_getattr(suspend_acctp->v_mount, &va, &context);
+ (void)vfs_getattr(suspend_acctp->v_mount, &va, ctx);
if (va.f_bavail > acctresume * va.f_blocks / 100) {
acctp = suspend_acctp;
suspend_acctp = NULLVP;
* goes over a high watermark
*/
if (acctp->v_type == VBAD) {
- (void) vn_close(acctp, FWRITE, NOCRED, NULL);
+ (void) vn_close(acctp, FWRITE, vfs_context_kernel());
acctp = NULLVP;
+ ACCT_SUBSYS_UNLOCK();
return;
}
- (void)vfs_getattr(acctp->v_mount, &va, &context);
+ (void)vfs_getattr(acctp->v_mount, &va, ctx);
if (va.f_bavail <= acctsuspend * va.f_blocks / 100) {
suspend_acctp = acctp;
acctp = NULLVP;
log(LOG_NOTICE, "Accounting suspended\n");
}
} else {
+ ACCT_SUBSYS_UNLOCK();
return;
- }
-
- timeout(acctwatch_funnel, NULL, acctchkfreq * hz);
+ }
+ ACCT_SUBSYS_UNLOCK();
+
+ timeout(acctwatch, NULL, acctchkfreq * hz);
}
projects / apple / xnu.git / blobdiff