/*
- * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2001 Apple Computer, Inc. All rights reserved.
*
* @APPLE_LICENSE_HEADER_START@
*
* SUCH DAMAGE.
*
* @(#)kern_ktrace.c 8.2 (Berkeley) 9/23/93
+ * $FreeBSD: src/sys/kern/kern_ktrace.c,v 1.35.2.4 2001/03/05 13:09:01 obrien Exp $
*/
#include <sys/param.h>
#include <sys/systm.h>
+#include <sys/types.h>
#include <sys/proc.h>
#include <sys/file.h>
#include <sys/namei.h>
#include <sys/vnode.h>
+#if KTRACE
#include <sys/ktrace.h>
+#endif
#include <sys/malloc.h>
#include <sys/syslog.h>
-#include <sys/mount.h>
-
#if KTRACE
+static struct ktr_header *ktrgetheader __P((int type));
+static void ktrwrite __P((struct vnode *, struct ktr_header *,
+ struct uio *, int));
+static int ktrcanset __P((struct proc *,struct proc *));
+static int ktrsetchildren __P((struct proc *,struct proc *,
+ int, int, struct vnode *));
+static int ktrops __P((struct proc *,struct proc *,int,int,struct vnode *));
-struct ktr_header *
+
+static struct ktr_header *
ktrgetheader(type)
int type;
{
register struct ktr_header *kth;
struct proc *p = current_proc(); /* XXX */
- MALLOC(kth, struct ktr_header *, sizeof (struct ktr_header),
- M_TEMP, M_WAITOK);
+ MALLOC(kth, struct ktr_header *, sizeof (struct ktr_header),
+ M_KTRACE, M_WAITOK);
kth->ktr_type = type;
microtime(&kth->ktr_time);
kth->ktr_pid = p->p_pid;
bcopy(p->p_comm, kth->ktr_comm, MAXCOMLEN);
return (kth);
}
+#endif
void
-ktrsyscall(vp, code, argsize, args)
- struct vnode *vp;
- register_t code;
- size_t argsize;
+ktrsyscall(p, code, narg, args, funnel_type)
+ struct proc *p;
+ int code, narg;
register_t args[];
+ int funnel_type;
{
+#if KTRACE
+ struct vnode *vp;
struct ktr_header *kth;
struct ktr_syscall *ktp;
- register len = sizeof(struct ktr_syscall) + argsize;
- struct proc *p = current_proc(); /* XXX */
+ register int len;
register_t *argp;
int i;
+ if (!KTRPOINT(p, KTR_SYSCALL))
+ return;
+
+ vp = p->p_tracep;
+ len = __offsetof(struct ktr_syscall, ktr_args) +
+ (narg * sizeof(register_t));
p->p_traceflag |= KTRFAC_ACTIVE;
kth = ktrgetheader(KTR_SYSCALL);
- MALLOC(ktp, struct ktr_syscall *, len, M_TEMP, M_WAITOK);
+ MALLOC(ktp, struct ktr_syscall *, len, M_KTRACE, M_WAITOK);
ktp->ktr_code = code;
- ktp->ktr_argsize = argsize;
- argp = (register_t *)((char *)ktp + sizeof(struct ktr_syscall));
- for (i = 0; i < (argsize / sizeof *argp); i++)
+ ktp->ktr_narg = narg;
+ argp = &ktp->ktr_args[0];
+ for (i = 0; i < narg; i++)
*argp++ = args[i];
kth->ktr_buf = (caddr_t)ktp;
kth->ktr_len = len;
- ktrwrite(vp, kth);
- FREE(ktp, M_TEMP);
- FREE(kth, M_TEMP);
+ ktrwrite(vp, kth, NULL, funnel_type);
+ FREE(ktp, M_KTRACE);
+ FREE(kth, M_KTRACE);
p->p_traceflag &= ~KTRFAC_ACTIVE;
+#else
+ return;
+#endif
}
-
+
void
-ktrsysret(vp, code, error, retval)
- struct vnode *vp;
- register_t code;
- int error;
+ktrsysret(p, code, error, retval, funnel_type)
+ struct proc *p;
+ int code, error;
register_t retval;
+ int funnel_type;
{
+#if KTRACE
+ struct vnode *vp;
struct ktr_header *kth;
struct ktr_sysret ktp;
- struct proc *p = current_proc(); /* XXX */
+ if (!KTRPOINT(p, KTR_SYSRET))
+ return;
+
+ vp = p->p_tracep;
p->p_traceflag |= KTRFAC_ACTIVE;
kth = ktrgetheader(KTR_SYSRET);
ktp.ktr_code = code;
kth->ktr_buf = (caddr_t)&ktp;
kth->ktr_len = sizeof(struct ktr_sysret);
- ktrwrite(vp, kth);
- FREE(kth, M_TEMP);
+ ktrwrite(vp, kth, NULL, funnel_type);
+ FREE(kth, M_KTRACE);
p->p_traceflag &= ~KTRFAC_ACTIVE;
+#else
+ return;
+#endif
}
+#if KTRACE
void
ktrnamei(vp, path)
struct vnode *vp;
kth->ktr_len = strlen(path);
kth->ktr_buf = path;
- ktrwrite(vp, kth);
- FREE(kth, M_TEMP);
+ ktrwrite(vp, kth, NULL, KERNEL_FUNNEL);
+ FREE(kth, M_KTRACE);
p->p_traceflag &= ~KTRFAC_ACTIVE;
}
void
-ktrgenio(vp, fd, rw, iov, len, error)
+ktrgenio(vp, fd, rw, uio, error, funnel_type)
struct vnode *vp;
int fd;
enum uio_rw rw;
- register struct iovec *iov;
- int len, error;
+ struct uio *uio;
+ int error;
+ int funnel_type;
{
struct ktr_header *kth;
- register struct ktr_genio *ktp;
- register caddr_t cp;
- register int resid = len, cnt;
+ struct ktr_genio ktg;
struct proc *p = current_proc(); /* XXX */
-
+
if (error)
return;
+
p->p_traceflag |= KTRFAC_ACTIVE;
kth = ktrgetheader(KTR_GENIO);
- MALLOC(ktp, struct ktr_genio *, sizeof(struct ktr_genio) + len,
- M_TEMP, M_WAITOK);
- ktp->ktr_fd = fd;
- ktp->ktr_rw = rw;
- cp = (caddr_t)((char *)ktp + sizeof (struct ktr_genio));
- while (resid > 0) {
- if ((cnt = iov->iov_len) > resid)
- cnt = resid;
- if (copyin(iov->iov_base, cp, (unsigned)cnt))
- goto done;
- cp += cnt;
- resid -= cnt;
- iov++;
- }
- kth->ktr_buf = (caddr_t)ktp;
- kth->ktr_len = sizeof (struct ktr_genio) + len;
-
- ktrwrite(vp, kth);
-done:
- FREE(kth, M_TEMP);
- FREE(ktp, M_TEMP);
+ ktg.ktr_fd = fd;
+ ktg.ktr_rw = rw;
+ kth->ktr_buf = (caddr_t)&ktg;
+ kth->ktr_len = sizeof(struct ktr_genio);
+ uio->uio_offset = 0;
+ uio->uio_rw = UIO_WRITE;
+
+ ktrwrite(vp, kth, uio, funnel_type);
+ FREE(kth, M_KTRACE);
p->p_traceflag &= ~KTRFAC_ACTIVE;
}
void
-ktrpsig(vp, sig, action, mask, code)
+ktrpsig(vp, sig, action, mask, code, funnel_type)
struct vnode *vp;
int sig;
sig_t action;
- int mask, code;
+ sigset_t *mask;
+ int code;
+ int funnel_type;
{
struct ktr_header *kth;
struct ktr_psig kp;
kth = ktrgetheader(KTR_PSIG);
kp.signo = (char)sig;
kp.action = action;
- kp.mask = mask;
+ kp.mask = *mask;
kp.code = code;
kth->ktr_buf = (caddr_t)&kp;
kth->ktr_len = sizeof (struct ktr_psig);
- ktrwrite(vp, kth);
- FREE(kth, M_TEMP);
+ ktrwrite(vp, kth, NULL, funnel_type);
+ FREE(kth, M_KTRACE);
p->p_traceflag &= ~KTRFAC_ACTIVE;
}
void
-ktrcsw(vp, out, user)
+ktrcsw(vp, out, user, funnel_type)
struct vnode *vp;
int out, user;
+ int funnel_type;
{
struct ktr_header *kth;
struct ktr_csw kc;
kth->ktr_buf = (caddr_t)&kc;
kth->ktr_len = sizeof (struct ktr_csw);
- ktrwrite(vp, kth);
- FREE(kth, M_TEMP);
+ ktrwrite(vp, kth, NULL, funnel_type);
+ FREE(kth, M_KTRACE);
p->p_traceflag &= ~KTRFAC_ACTIVE;
}
+#endif /* KTRACE */
/* Interface and common routines */
* ktrace system call
*/
struct ktrace_args {
- char * fname;
- int ops;
- int facs;
- int pid;
+ char *fname;
+ int ops;
+ int facs;
+ int pid;
};
/* ARGSUSED */
int
register struct ktrace_args *uap;
register_t *retval;
{
+#if KTRACE
register struct vnode *vp = NULL;
register struct proc *p;
struct pgrp *pg;
- int facs = SCARG(uap, facs) & ~KTRFAC_ROOT;
- int ops = KTROP(SCARG(uap, ops));
- int descend = SCARG(uap, ops) & KTRFLAG_DESCEND;
+ int facs = uap->facs & ~KTRFAC_ROOT;
+ int ops = KTROP(uap->ops);
+ int descend = uap->ops & KTRFLAG_DESCEND;
int ret = 0;
int error = 0;
struct nameidata nd;
/*
* an operation which requires a file argument.
*/
- NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, fname),
- curp);
- if (error = vn_open(&nd, FREAD|FWRITE, 0)) {
+ NDINIT(&nd, LOOKUP, (NOFOLLOW|LOCKLEAF), UIO_USERSPACE, uap->fname, curp);
+ error = vn_open(&nd, FREAD|FWRITE|O_NOFOLLOW, 0);
+ if (error) {
curp->p_traceflag &= ~KTRFAC_ACTIVE;
return (error);
}
vp = nd.ni_vp;
- VOP_UNLOCK(vp, 0, p);
+ VOP_UNLOCK(vp, 0, curp);
if (vp->v_type != VREG) {
(void) vn_close(vp, FREAD|FWRITE, curp->p_ucred, curp);
curp->p_traceflag &= ~KTRFAC_ACTIVE;
* Clear all uses of the tracefile
*/
if (ops == KTROP_CLEARFILE) {
- for (p = allproc.lh_first; p != 0; p = p->p_list.le_next) {
+ LIST_FOREACH(p, &allproc, p_list) {
if (p->p_tracep == vp) {
if (ktrcanset(curp, p)) {
- p->p_tracep = NULL;
+ struct vnode *tvp = p->p_tracep;
+ /* no more tracing */
p->p_traceflag = 0;
- (void) vn_close(vp, FREAD|FWRITE,
- p->p_ucred, p);
+ if (tvp != NULL) {
+ p->p_tracep = NULL;
+ vrele(tvp);
+ }
} else
error = EPERM;
}
}
goto done;
}
+
/*
* need something to (un)trace (XXX - why is this here?)
*/
error = EINVAL;
goto done;
}
- /*
+ /*
* do it
*/
- if (SCARG(uap, pid) < 0) {
+ if (uap->pid < 0) {
/*
* by process group
*/
- pg = pgfind(-SCARG(uap, pid));
+ pg = pgfind(-uap->pid);
if (pg == NULL) {
error = ESRCH;
goto done;
}
- for (p = pg->pg_members.lh_first; p != 0; p = p->p_pglist.le_next)
+ LIST_FOREACH(p, &pg->pg_members, p_pglist)
if (descend)
ret |= ktrsetchildren(curp, p, ops, facs, vp);
- else
+ else
ret |= ktrops(curp, p, ops, facs, vp);
-
+
} else {
/*
* by pid
*/
- p = pfind(SCARG(uap, pid));
+ p = pfind(uap->pid);
if (p == NULL) {
error = ESRCH;
goto done;
(void) vn_close(vp, FWRITE, curp->p_ucred, curp);
curp->p_traceflag &= ~KTRFAC_ACTIVE;
return (error);
+#else
+ return ENOSYS;
+#endif
}
+/*
+ * utrace system call
+ */
+struct utrace_args {
+ const void * addr;
+ size_t len;
+};
+
+/* ARGSUSED */
int
+utrace(curp, uap, retval)
+ struct proc *curp;
+ register struct utrace_args *uap;
+ register_t *retval;
+{
+#if KTRACE
+ struct ktr_header *kth;
+ struct proc *p = current_proc(); /* XXX */
+ register caddr_t cp;
+
+ if (!KTRPOINT(p, KTR_USER))
+ return (0);
+ if (uap->len > KTR_USER_MAXLEN)
+ return (EINVAL);
+ p->p_traceflag |= KTRFAC_ACTIVE;
+ kth = ktrgetheader(KTR_USER);
+ MALLOC(cp, caddr_t, uap->len, M_KTRACE, M_WAITOK);
+ if (!copyin(uap->addr, cp, uap->len)) {
+ kth->ktr_buf = cp;
+ kth->ktr_len = uap->len;
+ ktrwrite(p->p_tracep, kth, NULL, KERNEL_FUNNEL);
+ }
+ FREE(kth, M_KTRACE);
+ FREE(cp, M_KTRACE);
+ p->p_traceflag &= ~KTRFAC_ACTIVE;
+
+ return (0);
+#else
+ return (ENOSYS);
+#endif
+}
+
+#if KTRACE
+static int
ktrops(curp, p, ops, facs, vp)
struct proc *p, *curp;
int ops, facs;
struct vnode *vp;
{
+ struct vnode *tvp;
if (!ktrcanset(curp, p))
return (0);
if (ops == KTROP_SET) {
- if (p->p_tracep != vp) {
+ if (p->p_tracep != vp) {
/*
* if trace file already in use, relinquish
*/
- if (p->p_tracep != NULL)
- vrele(p->p_tracep);
+ tvp = p->p_tracep;
VREF(vp);
p->p_tracep = vp;
+ if (tvp != NULL)
+ vrele(tvp);
}
p->p_traceflag |= facs;
if (curp->p_ucred->cr_uid == 0)
p->p_traceflag |= KTRFAC_ROOT;
- } else {
+ } else {
/* KTROP_CLEAR */
if (((p->p_traceflag &= ~facs) & KTRFAC_MASK) == 0) {
/* no more tracing */
+ tvp = p->p_tracep;
p->p_traceflag = 0;
- if (p->p_tracep != NULL) {
- vrele(p->p_tracep);
+ if (tvp != NULL) {
p->p_tracep = NULL;
+ vrele(tvp);
}
}
}
return (1);
}
+static int
ktrsetchildren(curp, top, ops, facs, vp)
struct proc *curp, *top;
int ops, facs;
* otherwise do any siblings, and if done with this level,
* follow back up the tree (but not past top).
*/
- if (p->p_children.lh_first)
- p = p->p_children.lh_first;
+ if (!LIST_EMPTY(&p->p_children))
+ p = LIST_FIRST(&p->p_children);
else for (;;) {
if (p == top)
return (ret);
- if (p->p_sibling.le_next) {
- p = p->p_sibling.le_next;
+ if (LIST_NEXT(p, p_sibling)) {
+ p = LIST_NEXT(p, p_sibling);
break;
}
p = p->p_pptr;
/*NOTREACHED*/
}
-ktrwrite(vp, kth)
+static void
+ktrwrite(vp, kth, uio, funnel_type)
struct vnode *vp;
register struct ktr_header *kth;
+ struct uio *uio;
{
struct uio auio;
struct iovec aiov[2];
if (vp == NULL)
return;
+
+ if (funnel_type == -1) {
+ funnel_t *f = thread_funnel_get();
+ if(f == THR_FUNNEL_NULL)
+ funnel_type = NO_FUNNEL;
+ else if (f == (funnel_t *)network_flock)
+ funnel_type = NETWORK_FUNNEL;
+ else if (f == (funnel_t *)kernel_flock)
+ funnel_type = KERNEL_FUNNEL;
+ }
+
+ switch (funnel_type) {
+ case KERNEL_FUNNEL:
+ /* Nothing more to do */
+ break;
+ case NETWORK_FUNNEL:
+ thread_funnel_switch(NETWORK_FUNNEL, KERNEL_FUNNEL);
+ break;
+ case NO_FUNNEL:
+ (void) thread_funnel_set(kernel_flock, TRUE);
+ break;
+ default:
+ panic("Invalid funnel (%)", funnel_type);
+ }
auio.uio_iov = &aiov[0];
auio.uio_offset = 0;
auio.uio_segflg = UIO_SYSSPACE;
aiov[0].iov_len = sizeof(struct ktr_header);
auio.uio_resid = sizeof(struct ktr_header);
auio.uio_iovcnt = 1;
- auio.uio_procp = (struct proc *)0;
+ auio.uio_procp = current_proc();
if (kth->ktr_len > 0) {
auio.uio_iovcnt++;
aiov[1].iov_base = kth->ktr_buf;
aiov[1].iov_len = kth->ktr_len;
auio.uio_resid += kth->ktr_len;
+ if (uio != NULL)
+ kth->ktr_len += uio->uio_resid;
+ }
+ error = vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);
+ if (error)
+ goto bad;
+ (void)VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);
+ error = VOP_WRITE(vp, &auio, IO_UNIT | IO_APPEND, p->p_ucred);
+ if (error == 0 && uio != NULL) {
+ (void)VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);
+ error = VOP_WRITE(vp, uio, IO_UNIT | IO_APPEND, p->p_ucred);
}
- vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);
- error = VOP_WRITE(vp, &auio, IO_UNIT|IO_APPEND, p->p_ucred);
VOP_UNLOCK(vp, 0, p);
- if (!error)
+ if (!error) {
+ switch (funnel_type) {
+ case KERNEL_FUNNEL:
+ /* Nothing more to do */
+ break;
+ case NETWORK_FUNNEL:
+ thread_funnel_switch(KERNEL_FUNNEL, NETWORK_FUNNEL);
+ /* switch funnel to NETWORK_FUNNEL */
+ break;
+ case NO_FUNNEL:
+ (void) thread_funnel_set(kernel_flock, FALSE);
+ break;
+ default:
+ panic("Invalid funnel (%)", funnel_type);
+ }
return;
+ }
+
+bad:
/*
* If error encountered, give up tracing on this vnode.
*/
log(LOG_NOTICE, "ktrace write failed, errno %d, tracing stopped\n",
error);
- for (p = allproc.lh_first; p != 0; p = p->p_list.le_next) {
+ LIST_FOREACH(p, &allproc, p_list) {
if (p->p_tracep == vp) {
p->p_tracep = NULL;
p->p_traceflag = 0;
vrele(vp);
}
}
+
+ switch (funnel_type) {
+ case KERNEL_FUNNEL:
+ /* Nothing more to do */
+ break;
+ case NETWORK_FUNNEL:
+ thread_funnel_switch(KERNEL_FUNNEL, NETWORK_FUNNEL);
+ /* switch funnel to NETWORK_FUNNEL */
+ break;
+ case NO_FUNNEL:
+ (void) thread_funnel_set(kernel_flock, FALSE);
+ break;
+ default:
+ panic("Invalid funnel (%)", funnel_type);
+ }
}
/*
* Return true if caller has permission to set the ktracing state
* of target. Essentially, the target can't possess any
* more permissions than the caller. KTRFAC_ROOT signifies that
- * root previously set the tracing status on the target process, and
+ * root previously set the tracing status on the target process, and
* so, only root may further change it.
*
* TODO: check groups. use caller effective gid.
*/
+static int
ktrcanset(callp, targetp)
struct proc *callp, *targetp;
{
register struct pcred *caller = callp->p_cred;
register struct pcred *target = targetp->p_cred;
+ if (!PRISON_CHECK(callp, targetp))
+ return (0);
if ((caller->pc_ucred->cr_uid == target->p_ruid &&
target->p_ruid == target->p_svuid &&
caller->p_rgid == target->p_rgid && /* XXX */
return (0);
}
-#endif
+#endif /* KTRACE */
projects / apple / xnu.git / blobdiff