/*
- * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2002 Apple Computer, Inc. All rights reserved.
*
* @APPLE_LICENSE_HEADER_START@
*
#include <sys/stat.h>
#include <sys/malloc.h>
-#if KTRACE
-#include <sys/ktrace.h>
-#endif
-
#include <sys/mount.h>
#include <sys/protosw.h>
#include <sys/ev.h>
#include <netinet/tcp_debug.h>
/* for wait queue based select */
#include <kern/wait_queue.h>
+#if KTRACE
+#include <sys/ktrace.h>
+#endif
+
+static int dofileread __P((struct proc *, struct file *, int, void *,
+ size_t, off_t, int, int*));
+static int dofilewrite __P((struct proc *, struct file *, int,
+ const void *, size_t, off_t, int, int*));
+
+static struct file*
+holdfp(fdp, fd, flag)
+ struct filedesc* fdp;
+ int fd, flag;
+{
+ struct file* fp;
+
+ if (((u_int)fd) >= fdp->fd_nfiles ||
+ (fp = fdp->fd_ofiles[fd]) == NULL ||
+ (fp->f_flag & flag) == 0) {
+ return (NULL);
+ }
+ fref(fp);
+ return (fp);
+}
/*
* Read system call.
*/
+#ifndef _SYS_SYSPROTO_H_
struct read_args {
int fd;
char *cbuf;
u_int nbyte;
};
-/* ARGSUSED */
+#endif
+int
read(p, uap, retval)
struct proc *p;
register struct read_args *uap;
register_t *retval;
+{
+ register struct file *fp;
+ int error;
+
+ if ((fp = holdfp(p->p_fd, uap->fd, FREAD)) == NULL)
+ return (EBADF);
+ error = dofileread(p, fp, uap->fd, uap->cbuf, uap->nbyte,
+ (off_t)-1, 0, retval);
+ frele(fp);
+ return(error);
+}
+
+/*
+ * Pread system call
+ */
+#ifndef _SYS_SYSPROTO_H_
+struct pread_args {
+ int fd;
+ void *buf;
+ size_t nbyte;
+#ifdef DOUBLE_ALIGN_PARAMS
+ int pad;
+#endif
+ off_t offset;
+};
+#endif
+int
+pread(p, uap, retval)
+ struct proc *p;
+ register struct pread_args *uap;
+ int *retval;
+{
+ register struct file *fp;
+ int error;
+
+ if ((fp = holdfp(p->p_fd, uap->fd, FREAD)) == NULL)
+ return (EBADF);
+ if (fp->f_type != DTYPE_VNODE) {
+ error = ESPIPE;
+ } else {
+ error = dofileread(p, fp, uap->fd, uap->buf, uap->nbyte,
+ uap->offset, FOF_OFFSET, retval);
+ }
+ frele(fp);
+ return(error);
+}
+
+/*
+ * Code common for read and pread
+ */
+int
+dofileread(p, fp, fd, buf, nbyte, offset, flags, retval)
+ struct proc *p;
+ struct file *fp;
+ int fd, flags;
+ void *buf;
+ size_t nbyte;
+ off_t offset;
+ int *retval;
{
struct uio auio;
struct iovec aiov;
+ long cnt, error = 0;
+#if KTRACE
+ struct iovec ktriov;
+ struct uio ktruio;
+ int didktr = 0;
+#endif
- aiov.iov_base = (caddr_t)uap->cbuf;
- aiov.iov_len = uap->nbyte;
+ aiov.iov_base = (caddr_t)buf;
+ aiov.iov_len = nbyte;
auio.uio_iov = &aiov;
auio.uio_iovcnt = 1;
+ auio.uio_offset = offset;
+ if (nbyte > INT_MAX)
+ return (EINVAL);
+ auio.uio_resid = nbyte;
auio.uio_rw = UIO_READ;
- return (rwuio(p, uap->fd, &auio, UIO_READ, retval));
+ auio.uio_segflg = UIO_USERSPACE;
+ auio.uio_procp = p;
+#if KTRACE
+ /*
+ * if tracing, save a copy of iovec
+ */
+ if (KTRPOINT(p, KTR_GENIO)) {
+ ktriov = aiov;
+ ktruio = auio;
+ didktr = 1;
+ }
+#endif
+ cnt = nbyte;
+
+ if ((error = fo_read(fp, &auio, fp->f_cred, flags, p))) {
+ if (auio.uio_resid != cnt && (error == ERESTART ||
+ error == EINTR || error == EWOULDBLOCK))
+ error = 0;
+ }
+ cnt -= auio.uio_resid;
+#if KTRACE
+ if (didktr && error == 0) {
+ ktruio.uio_iov = &ktriov;
+ ktruio.uio_resid = cnt;
+ ktrgenio(p->p_tracep, fd, UIO_READ, &ktruio, error,
+ KERNEL_FUNNEL);
+ }
+#endif
+ *retval = cnt;
+ return (error);
}
+/*
+ * Scatter read system call.
+ */
+#ifndef _SYS_SYSPROTO_H_
struct readv_args {
int fd;
struct iovec *iovp;
u_int iovcnt;
};
+#endif
+int
readv(p, uap, retval)
struct proc *p;
register struct readv_args *uap;
/*
* Write system call
*/
+#ifndef _SYS_SYSPROTO_H_
struct write_args {
int fd;
char *cbuf;
u_int nbyte;
};
+#endif
+int
write(p, uap, retval)
struct proc *p;
register struct write_args *uap;
int *retval;
{
+ register struct file *fp;
+ int error;
+
+ if ((fp = holdfp(p->p_fd, uap->fd, FWRITE)) == NULL)
+ return (EBADF);
+ error = dofilewrite(p, fp, uap->fd, uap->cbuf, uap->nbyte,
+ (off_t)-1, 0, retval);
+ frele(fp);
+ return(error);
+}
+
+/*
+ * Pwrite system call
+ */
+#ifndef _SYS_SYSPROTO_H_
+struct pwrite_args {
+ int fd;
+ const void *buf;
+ size_t nbyte;
+#ifdef DOUBLE_ALIGN_PARAMS
+ int pad;
+#endif
+ off_t offset;
+};
+#endif
+int
+pwrite(p, uap, retval)
+ struct proc *p;
+ register struct pwrite_args *uap;
+ int *retval;
+{
+ register struct file *fp;
+ int error;
+
+ if ((fp = holdfp(p->p_fd, uap->fd, FWRITE)) == NULL)
+ return (EBADF);
+ if (fp->f_type != DTYPE_VNODE) {
+ error = ESPIPE;
+ } else {
+ error = dofilewrite(p, fp, uap->fd, uap->buf, uap->nbyte,
+ uap->offset, FOF_OFFSET, retval);
+ }
+ frele(fp);
+ return(error);
+}
+
+static int
+dofilewrite(p, fp, fd, buf, nbyte, offset, flags, retval)
+ struct proc *p;
+ struct file *fp;
+ int fd, flags;
+ const void *buf;
+ size_t nbyte;
+ off_t offset;
+ int *retval;
+{
struct uio auio;
struct iovec aiov;
-
- aiov.iov_base = uap->cbuf;
- aiov.iov_len = uap->nbyte;
+ long cnt, error = 0;
+#if KTRACE
+ struct iovec ktriov;
+ struct uio ktruio;
+ int didktr = 0;
+#endif
+
+ aiov.iov_base = (void *)(uintptr_t)buf;
+ aiov.iov_len = nbyte;
auio.uio_iov = &aiov;
- auio.uio_iovcnt = 1;
+ auio.uio_iovcnt = 1;
+ auio.uio_offset = offset;
+ if (nbyte > INT_MAX)
+ return (EINVAL);
+ auio.uio_resid = nbyte;
auio.uio_rw = UIO_WRITE;
- return (rwuio(p, uap->fd, &auio, UIO_WRITE, retval));
+ auio.uio_segflg = UIO_USERSPACE;
+ auio.uio_procp = p;
+#if KTRACE
+ /*
+ * if tracing, save a copy of iovec and uio
+ */
+ if (KTRPOINT(p, KTR_GENIO)) {
+ ktriov = aiov;
+ ktruio = auio;
+ didktr = 1;
+ }
+#endif
+ cnt = nbyte;
+ if (fp->f_type == DTYPE_VNODE)
+ bwillwrite();
+ if ((error = fo_write(fp, &auio, fp->f_cred, flags, p))) {
+ if (auio.uio_resid != cnt && (error == ERESTART ||
+ error == EINTR || error == EWOULDBLOCK))
+ error = 0;
+ if (error == EPIPE)
+ psignal(p, SIGPIPE);
+ }
+ cnt -= auio.uio_resid;
+#if KTRACE
+ if (didktr && error == 0) {
+ ktruio.uio_iov = &ktriov;
+ ktruio.uio_resid = cnt;
+ ktrgenio(p->p_tracep, fd, UIO_WRITE, &ktruio, error,
+ KERNEL_FUNNEL);
+ }
+#endif
+ *retval = cnt;
+ return (error);
}
-
+
+/*
+ * Gather write system call
+ */
+#ifndef _SYS_SYSPROTO_H_
struct writev_args {
int fd;
struct iovec *iovp;
u_int iovcnt;
};
+#endif
+int
writev(p, uap, retval)
struct proc *p;
register struct writev_args *uap;
return (error);
}
+int
rwuio(p, fdes, uio, rw, retval)
struct proc *p;
int fdes;
struct file *fp;
register struct iovec *iov;
int i, count, flag, error;
+#if KTRACE
+ struct iovec *ktriov;
+ struct uio ktruio;
+ int didktr = 0;
+ u_int iovlen;
+#endif
if (error = fdgetf(p, fdes, &fp))
return (error);
iov++;
}
count = uio->uio_resid;
+#if KTRACE
+ /*
+ * if tracing, save a copy of iovec
+ */
+ if (KTRPOINT(p, KTR_GENIO)) {
+ iovlen = uio->uio_iovcnt * sizeof (struct iovec);
+ MALLOC(ktriov, struct iovec *, iovlen, M_TEMP, M_WAITOK);
+ bcopy((caddr_t)uio->uio_iov, (caddr_t)ktriov, iovlen);
+ ktruio = *uio;
+ didktr = 1;
+ }
+#endif
+
if (rw == UIO_READ) {
- if (error = (*fp->f_ops->fo_read)(fp, uio, fp->f_cred))
- if (uio->uio_resid != count && (error == ERESTART ||
- error == EINTR || error == EWOULDBLOCK))
- error = 0;
+ if (error = fo_read(fp, uio, fp->f_cred, 0, p))
+ if (uio->uio_resid != count && (error == ERESTART ||
+ error == EINTR || error == EWOULDBLOCK))
+ error = 0;
} else {
- if (error = (*fp->f_ops->fo_write)(fp, uio, fp->f_cred)) {
+ if (fp->f_type == DTYPE_VNODE)
+ bwillwrite();
+ if (error = fo_write(fp, uio, fp->f_cred, 0, p)) {
if (uio->uio_resid != count && (error == ERESTART ||
- error == EINTR || error == EWOULDBLOCK))
+ error == EINTR || error == EWOULDBLOCK))
error = 0;
- if (error == EPIPE)
+ /* The socket layer handles SIGPIPE */
+ if (error == EPIPE && fp->f_type != DTYPE_SOCKET)
psignal(p, SIGPIPE);
}
}
+
*retval = count - uio->uio_resid;
+
+#if KTRACE
+ if (didktr) {
+ if (error == 0) {
+ ktruio.uio_iov = ktriov;
+ ktruio.uio_resid = *retval;
+ ktrgenio(p->p_tracep, fdes, rw, &ktruio, error,
+ KERNEL_FUNNEL);
+ }
+ FREE(ktriov, M_TEMP);
+ }
+#endif
+
return(error);
}
/*
* Ioctl system call
*/
+#ifndef _SYS_SYSPROTO_H_
struct ioctl_args {
int fd;
u_long com;
caddr_t data;
};
-/* ARGSUSED */
+#endif
+int
ioctl(p, uap, retval)
struct proc *p;
register struct ioctl_args *uap;
if ((fp->f_flag & (FREAD | FWRITE)) == 0)
return (EBADF);
- /*### LD 6/11/97 Hack Alert: this is to get AppleTalk to work
+#if NETAT
+ /*
+ * ### LD 6/11/97 Hack Alert: this is to get AppleTalk to work
* while implementing an ATioctl system call
*/
-#if NETAT
{
extern int appletalk_inited;
#ifdef APPLETALK_DEBUG
kprintf("ioctl: special AppleTalk \n");
#endif
- error = (*fp->f_ops->fo_ioctl)(fp, uap->com, uap->data, p);
+ error = fo_ioctl(fp, uap->com, uap->data, p);
return(error);
}
}
fp->f_flag |= FNONBLOCK;
else
fp->f_flag &= ~FNONBLOCK;
- error = (*fp->f_ops->fo_ioctl)(fp, FIONBIO, (caddr_t)&tmp, p);
+ error = fo_ioctl(fp, FIONBIO, (caddr_t)&tmp, p);
break;
case FIOASYNC:
fp->f_flag |= FASYNC;
else
fp->f_flag &= ~FASYNC;
- error = (*fp->f_ops->fo_ioctl)(fp, FIOASYNC, (caddr_t)&tmp, p);
+ error = fo_ioctl(fp, FIOASYNC, (caddr_t)&tmp, p);
break;
case FIOSETOWN:
}
tmp = p1->p_pgrp->pg_id;
}
- error = (*fp->f_ops->fo_ioctl)
- (fp, (int)TIOCSPGRP, (caddr_t)&tmp, p);
+ error = fo_ioctl(fp, (int)TIOCSPGRP, (caddr_t)&tmp, p);
break;
case FIOGETOWN:
*(int *)data = ((struct socket *)fp->f_data)->so_pgid;
break;
}
- error = (*fp->f_ops->fo_ioctl)(fp, TIOCGPGRP, data, p);
+ error = fo_ioctl(fp, TIOCGPGRP, data, p);
*(int *)data = -*(int *)data;
break;
default:
- error = (*fp->f_ops->fo_ioctl)(fp, com, data, p);
+ error = fo_ioctl(fp, com, data, p);
/*
* Copy any data to user, size was
* already set and checked above.
return (error);
}
-
int selwait, nselcoll;
#define SEL_FIRSTPASS 1
#define SEL_SECONDPASS 2
+extern int selcontinue(int error);
+extern int selprocess(int error, int sel_pass);
+static int selscan(struct proc *p, struct _select * sel,
+ int nfd, register_t *retval, int sel_pass);
+static int selcount(struct proc *p, u_int32_t *ibits, u_int32_t *obits,
+ int nfd, int * count, int * nfcount);
+extern uint64_t tvtoabstime(struct timeval *tvp);
/*
* Select system call.
*/
+#ifndef _SYS_SYSPROTO_H_
struct select_args {
int nd;
u_int32_t *in;
u_int32_t *ex;
struct timeval *tv;
};
-
-extern int selcontinue(int error);
-extern int selprocess(int error, int sel_pass);
-static int selscan( struct proc *p, struct _select * sel,
- int nfd, register_t *retval, int sel_pass);
-static int selcount(struct proc *p, u_int32_t *ibits, u_int32_t *obits,
- int nfd, int * count, int * nfcount);
-
+#endif
+int
select(p, uap, retval)
register struct proc *p;
register struct select_args *uap;
register_t *retval;
{
- int s, error = 0, timo;
+ int error = 0;
u_int ni, nw, size;
thread_act_t th_act;
struct uthread *uth;
#undef getbits
if (uap->tv) {
- error = copyin((caddr_t)uap->tv, (caddr_t)&sel->atv,
- sizeof (sel->atv));
+ struct timeval atv;
+
+ error = copyin((caddr_t)uap->tv, (caddr_t)&atv, sizeof (atv));
if (error)
goto continuation;
- if (itimerfix(&sel->atv)) {
+ if (itimerfix(&atv)) {
error = EINVAL;
goto continuation;
}
- timeradd(&sel->atv, &time, &sel->atv);
- timo = hzto(&sel->atv);
- } else
- timo = 0;
- sel->poll = timo;
+ clock_absolutetime_interval_to_deadline(
+ tvtoabstime(&atv), &sel->abstime);
+ }
+ else
+ sel->abstime = 0;
+
sel->nfcount = 0;
if (error = selcount(p, sel->ibits, sel->obits, uap->nd, &count, &nfcount)) {
goto continuation;
wait_queue_sub_init(uth->uu_wqsub, (SYNC_POLICY_FIFO | SYNC_POLICY_PREPOST));
continuation:
- selprocess(error, SEL_FIRSTPASS);
+ return selprocess(error, SEL_FIRSTPASS);
}
int
selcontinue(int error)
{
- selprocess(error, SEL_SECONDPASS);
+ return selprocess(error, SEL_SECONDPASS);
}
int
selprocess(error, sel_pass)
{
- int s, ncoll, timo;
+ int ncoll;
u_int ni, nw;
thread_act_t th_act;
struct uthread *uth;
int *retval;
struct _select *sel;
int unwind = 1;
- int prepost =0;
+ int prepost = 0;
int somewakeup = 0;
int doretry = 0;
+ wait_result_t wait_result;
p = current_proc();
th_act = current_act();
}
}
- /* this should be timercmp(&time, &atv, >=) */
- if (uap->tv && (time.tv_sec > sel->atv.tv_sec ||
- time.tv_sec == sel->atv.tv_sec && time.tv_usec >= sel->atv.tv_usec)) {
- goto done;
+ if (uap->tv) {
+ uint64_t now;
+
+ clock_get_uptime(&now);
+ if (now >= sel->abstime)
+ goto done;
}
if (doretry) {
* To effect a poll, the timeout argument should be
* non-nil, pointing to a zero-valued timeval structure.
*/
- timo = sel->poll;
-
- if (uap->tv && (timo == 0)) {
+ if (uap->tv && sel->abstime == 0) {
goto done;
}
panic("selprocess: 2nd pass assertwaiting");
/* Wait Queue Subordinate has waitqueue as first element */
- if (wait_queue_assert_wait(uth->uu_wqsub, &selwait, THREAD_ABORTSAFE)) {
- /* If it is true then there are no preposted events */
- error = tsleep1((caddr_t)&selwait, PSOCK | PCATCH, "select", timo, selcontinue);
+ wait_result = wait_queue_assert_wait((wait_queue_t)uth->uu_wqsub,
+ &selwait, THREAD_ABORTSAFE);
+ if (wait_result != THREAD_AWAKENED) {
+ /* there are no preposted events */
+ error = tsleep1(NULL, PSOCK | PCATCH,
+ "select", sel->abstime, selcontinue);
} else {
prepost = 1;
error = 0;
putbits(ex, 2);
#undef putbits
}
-
-#if defined (__i386__)
return(error);
-#else
- unix_syscall_return(error);
-#endif
}
static int
else
wql_ptr = (wql+ nc * SIZEOF_WAITQUEUE_LINK);
if (fp->f_ops && (fp->f_type != DTYPE_SOCKET)
- && (*fp->f_ops->fo_select)(fp, flag[msk], wql_ptr, p)) {
+ && fo_select(fp, flag[msk], wql_ptr, p)) {
optr[fd/NFDBITS] |= (1 << (fd % NFDBITS));
n++;
}
fp = fdp->fd_ofiles[fd];
if (fp == NULL ||
(fdp->fd_ofileflags[fd] & UF_RESERVED)) {
+ thread_funnel_switch(NETWORK_FUNNEL, KERNEL_FUNNEL);
return(EBADF);
}
if (sel_pass == SEL_SECONDPASS)
else
wql_ptr = (wql+ nc * SIZEOF_WAITQUEUE_LINK);
if (fp->f_ops && (fp->f_type == DTYPE_SOCKET) &&
- (*fp->f_ops->fo_select)(fp, flag[msk], wql_ptr, p)) {
+ fo_select(fp, flag[msk], wql_ptr, p)) {
optr[fd/NFDBITS] |= (1 << (fd % NFDBITS));
n++;
}
}
/*ARGSUSED*/
+int
seltrue(dev, flag, p)
dev_t dev;
int flag;
* called upon socket close. deque and free all events for
* the socket
*/
+void
evsofree(struct socket *sp)
{
struct eventqelt *eqp, *next;
* enque this event if it's not already queued. wakeup
the proc if we do queue this event to it.
*/
+void
evprocenque(struct eventqelt *eqp)
{
struct proc *p;
* given either a sockbuf or a socket run down the
* event list and queue ready events found
*/
+void
postevent(struct socket *sp, struct sockbuf *sb, int event)
{
int mask;
*/
int
waitevent(p, uap, retval)
- struct proc *p;
- struct evwait_args *uap;
- register_t *retval;
+ struct proc *p;
+ struct evwait_args *uap;
+ register_t *retval;
{
- int error = 0;
- struct eventqelt *eqp;
- int timo;
- struct timeval atv;
- int s;
+ int error = 0;
+ struct eventqelt *eqp;
+ uint64_t abstime, interval;
if (uap->tv) {
- error = copyin((caddr_t)uap->tv, (caddr_t)&atv,
- sizeof (atv));
+ struct timeval atv;
+
+ error = copyin((caddr_t)uap->tv, (caddr_t)&atv, sizeof (atv));
if (error)
- return(error);
+ return(error);
if (itimerfix(&atv)) {
error = EINVAL;
return(error);
}
- s = splhigh();
- timeradd(&atv, &time, &atv);
- timo = hzto(&atv);
- splx(s);
- } else
- timo = 0;
- KERNEL_DEBUG(DBG_MISC_WAIT|DBG_FUNC_START, 0,0,0,0,0);
+ interval = tvtoabstime(&atv);
+ }
+ else
+ abstime = interval = 0;
+
+ KERNEL_DEBUG(DBG_MISC_WAIT|DBG_FUNC_START, 0,0,0,0,0);
retry:
- s = splhigh();
- if ((eqp = evprocdeque(p,NULL)) != NULL) {
- splx(s);
- error = copyout((caddr_t)&eqp->ee_req, (caddr_t)uap->u_req,
- sizeof(struct eventreq));
- KERNEL_DEBUG(DBG_MISC_WAIT|DBG_FUNC_END, error,
- eqp->ee_req.er_handle,eqp->ee_req.er_eventbits,eqp,0);
- return(error);
- } else {
- if (uap->tv && (timo == 0)) {
- splx(s);
- *retval = 1; // poll failed
- KERNEL_DEBUG(DBG_MISC_WAIT|DBG_FUNC_END, error,0,0,0,0);
- return(error);
- }
+ if ((eqp = evprocdeque(p,NULL)) != NULL) {
+ error = copyout((caddr_t)&eqp->ee_req,
+ (caddr_t)uap->u_req, sizeof(struct eventreq));
+ KERNEL_DEBUG(DBG_MISC_WAIT|DBG_FUNC_END, error,
+ eqp->ee_req.er_handle,eqp->ee_req.er_eventbits,eqp,0);
- KERNEL_DEBUG(DBG_MISC_WAIT, 1,&p->p_evlist,0,0,0);
- error = tsleep(&p->p_evlist, PSOCK | PCATCH, "waitevent", timo);
- KERNEL_DEBUG(DBG_MISC_WAIT, 2,&p->p_evlist,0,0,0);
- splx(s);
- if (error == 0)
- goto retry;
- if (error == ERESTART)
- error = EINTR;
- if (error == EWOULDBLOCK) {
- *retval = 1;
- error = 0;
- }
- }
- KERNEL_DEBUG(DBG_MISC_WAIT|DBG_FUNC_END, 0,0,0,0,0);
- return(error);
+ return (error);
+ }
+ else {
+ if (uap->tv && interval == 0) {
+ *retval = 1; // poll failed
+ KERNEL_DEBUG(DBG_MISC_WAIT|DBG_FUNC_END, error,0,0,0,0);
+
+ return (error);
+ }
+
+ if (interval != 0)
+ clock_absolutetime_interval_to_deadline(interval, &abstime)
+
+ KERNEL_DEBUG(DBG_MISC_WAIT, 1,&p->p_evlist,0,0,0);
+ error = tsleep1(&p->p_evlist, PSOCK | PCATCH,
+ "waitevent", abstime, (int (*)(int))0);
+ KERNEL_DEBUG(DBG_MISC_WAIT, 2,&p->p_evlist,0,0,0);
+ if (error == 0)
+ goto retry;
+ if (error == ERESTART)
+ error = EINTR;
+ if (error == EWOULDBLOCK) {
+ *retval = 1;
+ error = 0;
+ }
+ }
+
+ KERNEL_DEBUG(DBG_MISC_WAIT|DBG_FUNC_END, 0,0,0,0,0);
+
+ return (error);
}
struct modwatch_args {
projects / apple / xnu.git / blobdiff