Commit fee64d3c authored by Jeff Dike's avatar Jeff Dike Committed by Linus Torvalds
Browse files

uml: syle fixes in arch/um/os-Linux



Style fixes in arch/um/os-Linux/irq.c and arch/um/os-Linux/sigio.c:
	Updated copyrights
	trimmed includes
	added severity indicators to printks
	CodingStyle fixes
	turned an bunch of panics into printks
	call some libc functions directly instead of going through the
os_* wrappers
Signed-off-by: default avatarJeff Dike <jdike@linux.intel.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 260c0cb8
/*
* Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com)
* Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
* Licensed under the GPL
*/
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <poll.h>
#include <signal.h>
#include <string.h>
#include <sys/poll.h>
#include <sys/types.h>
#include <sys/time.h>
#include "user.h"
#include "process.h"
#include "sigio.h"
#include "irq_user.h"
#include "kern_constants.h"
#include "os.h"
#include "process.h"
#include "um_malloc.h"
#include "user.h"
/*
* Locked by irq_lock in arch/um/kernel/irq.c. Changed by os_create_pollfd
......@@ -35,7 +32,7 @@ int os_waiting_for_events(struct irq_fd *active_fds)
if (n < 0) {
err = -errno;
if (errno != EINTR)
printk("sigio_handler: os_waiting_for_events:"
printk(UM_KERN_ERR "os_waiting_for_events:"
" poll returned %d, errno = %d\n", n, errno);
return err;
}
......@@ -94,24 +91,26 @@ void os_free_irq_by_cb(int (*test)(struct irq_fd *, void *), void *arg,
struct irq_fd *old_fd = *prev;
if ((pollfds[i].fd != -1) &&
(pollfds[i].fd != (*prev)->fd)) {
printk("os_free_irq_by_cb - mismatch between "
"active_fds and pollfds, fd %d vs %d\n",
printk(UM_KERN_ERR "os_free_irq_by_cb - "
"mismatch between active_fds and "
"pollfds, fd %d vs %d\n",
(*prev)->fd, pollfds[i].fd);
goto out;
}
pollfds_num--;
/* This moves the *whole* array after pollfds[i]
/*
* This moves the *whole* array after pollfds[i]
* (though it doesn't spot as such)!
*/
memmove(&pollfds[i], &pollfds[i + 1],
(pollfds_num - i) * sizeof(pollfds[0]));
if(*last_irq_ptr2 == &old_fd->next)
if (*last_irq_ptr2 == &old_fd->next)
*last_irq_ptr2 = prev;
*prev = (*prev)->next;
if(old_fd->type == IRQ_WRITE)
if (old_fd->type == IRQ_WRITE)
ignore_sigio_fd(old_fd->fd);
kfree(old_fd);
continue;
......
/*
* Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
* Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
* Licensed under the GPL
*/
#include <unistd.h>
#include <stdlib.h>
#include <termios.h>
#include <errno.h>
#include <fcntl.h>
#include <poll.h>
#include <pty.h>
#include <sched.h>
#include <signal.h>
#include <fcntl.h>
#include <errno.h>
#include <string.h>
#include <sched.h>
#include <sys/socket.h>
#include <sys/poll.h>
#include "init.h"
#include "user.h"
#include "kern_constants.h"
#include "kern_util.h"
#include "sigio.h"
#include "init.h"
#include "os.h"
#include "sigio.h"
#include "um_malloc.h"
#include "user.h"
/* Protected by sigio_lock(), also used by sigio_cleanup, which is an
/*
* Protected by sigio_lock(), also used by sigio_cleanup, which is an
* exitcall.
*/
static int write_sigio_pid = -1;
static unsigned long write_sigio_stack;
/* These arrays are initialized before the sigio thread is started, and
/*
* These arrays are initialized before the sigio thread is started, and
* the descriptors closed after it is killed. So, it can't see them change.
* On the UML side, they are changed under the sigio_lock.
*/
......@@ -42,7 +42,8 @@ struct pollfds {
int used;
};
/* Protected by sigio_lock(). Used by the sigio thread, but the UML thread
/*
* Protected by sigio_lock(). Used by the sigio thread, but the UML thread
* synchronizes with it.
*/
static struct pollfds current_poll;
......@@ -56,23 +57,26 @@ static int write_sigio_thread(void *unused)
int i, n, respond_fd;
char c;
signal(SIGWINCH, SIG_IGN);
signal(SIGWINCH, SIG_IGN);
fds = &current_poll;
while(1){
while (1) {
n = poll(fds->poll, fds->used, -1);
if(n < 0){
if(errno == EINTR) continue;
printk("write_sigio_thread : poll returned %d, "
"errno = %d\n", n, errno);
if (n < 0) {
if (errno == EINTR)
continue;
printk(UM_KERN_ERR "write_sigio_thread : poll returned "
"%d, errno = %d\n", n, errno);
}
for(i = 0; i < fds->used; i++){
for (i = 0; i < fds->used; i++) {
p = &fds->poll[i];
if(p->revents == 0) continue;
if(p->fd == sigio_private[1]){
if (p->revents == 0)
continue;
if (p->fd == sigio_private[1]) {
CATCH_EINTR(n = read(sigio_private[1], &c,
sizeof(c)));
if(n != sizeof(c))
printk("write_sigio_thread : "
if (n != sizeof(c))
printk(UM_KERN_ERR
"write_sigio_thread : "
"read on socket failed, "
"err = %d\n", errno);
tmp = current_poll;
......@@ -88,9 +92,10 @@ static int write_sigio_thread(void *unused)
}
CATCH_EINTR(n = write(respond_fd, &c, sizeof(c)));
if(n != sizeof(c))
printk("write_sigio_thread : write on socket "
"failed, err = %d\n", errno);
if (n != sizeof(c))
printk(UM_KERN_ERR "write_sigio_thread : "
"write on socket failed, err = %d\n",
errno);
}
}
......@@ -101,12 +106,13 @@ static int need_poll(struct pollfds *polls, int n)
{
struct pollfd *new;
if(n <= polls->size)
if (n <= polls->size)
return 0;
new = kmalloc(n * sizeof(struct pollfd), UM_GFP_ATOMIC);
if(new == NULL){
printk("need_poll : failed to allocate new pollfds\n");
if (new == NULL) {
printk(UM_KERN_ERR "need_poll : failed to allocate new "
"pollfds\n");
return -ENOMEM;
}
......@@ -118,7 +124,8 @@ static int need_poll(struct pollfds *polls, int n)
return 0;
}
/* Must be called with sigio_lock held, because it's needed by the marked
/*
* Must be called with sigio_lock held, because it's needed by the marked
* critical section.
*/
static void update_thread(void)
......@@ -128,15 +135,17 @@ static void update_thread(void)
char c;
flags = set_signals(0);
n = write(sigio_private[0], &c, sizeof(c));
if(n != sizeof(c)){
printk("update_thread : write failed, err = %d\n", errno);
CATCH_EINTR(n = write(sigio_private[0], &c, sizeof(c)));
if (n != sizeof(c)) {
printk(UM_KERN_ERR "update_thread : write failed, err = %d\n",
errno);
goto fail;
}
CATCH_EINTR(n = read(sigio_private[0], &c, sizeof(c)));
if(n != sizeof(c)){
printk("update_thread : read failed, err = %d\n", errno);
if (n != sizeof(c)) {
printk(UM_KERN_ERR "update_thread : read failed, err = %d\n",
errno);
goto fail;
}
......@@ -163,23 +172,23 @@ int add_sigio_fd(int fd)
int err = 0, i, n;
sigio_lock();
for(i = 0; i < all_sigio_fds.used; i++){
if(all_sigio_fds.poll[i].fd == fd)
for (i = 0; i < all_sigio_fds.used; i++) {
if (all_sigio_fds.poll[i].fd == fd)
break;
}
if(i == all_sigio_fds.used)
if (i == all_sigio_fds.used)
goto out;
p = &all_sigio_fds.poll[i];
for(i = 0; i < current_poll.used; i++){
if(current_poll.poll[i].fd == fd)
for (i = 0; i < current_poll.used; i++) {
if (current_poll.poll[i].fd == fd)
goto out;
}
n = current_poll.used;
err = need_poll(&next_poll, n + 1);
if(err)
if (err)
goto out;
memcpy(next_poll.poll, current_poll.poll,
......@@ -197,27 +206,29 @@ int ignore_sigio_fd(int fd)
struct pollfd *p;
int err = 0, i, n = 0;
/* This is called from exitcalls elsewhere in UML - if
/*
* This is called from exitcalls elsewhere in UML - if
* sigio_cleanup has already run, then update_thread will hang
* or fail because the thread is no longer running.
*/
if(write_sigio_pid == -1)
if (write_sigio_pid == -1)
return -EIO;
sigio_lock();
for(i = 0; i < current_poll.used; i++){
if(current_poll.poll[i].fd == fd) break;
for (i = 0; i < current_poll.used; i++) {
if (current_poll.poll[i].fd == fd)
break;
}
if(i == current_poll.used)
if (i == current_poll.used)
goto out;
err = need_poll(&next_poll, current_poll.used - 1);
if(err)
if (err)
goto out;
for(i = 0; i < current_poll.used; i++){
for (i = 0; i < current_poll.used; i++) {
p = &current_poll.poll[i];
if(p->fd != fd)
if (p->fd != fd)
next_poll.poll[n++] = *p;
}
next_poll.used = current_poll.used - 1;
......@@ -234,7 +245,8 @@ static struct pollfd *setup_initial_poll(int fd)
p = kmalloc(sizeof(struct pollfd), UM_GFP_KERNEL);
if (p == NULL) {
printk("setup_initial_poll : failed to allocate poll\n");
printk(UM_KERN_ERR "setup_initial_poll : failed to allocate "
"poll\n");
return NULL;
}
*p = ((struct pollfd) { .fd = fd,
......@@ -260,27 +272,29 @@ static void write_sigio_workaround(void)
return;
err = os_pipe(l_write_sigio_fds, 1, 1);
if(err < 0){
printk("write_sigio_workaround - os_pipe 1 failed, "
if (err < 0) {
printk(UM_KERN_ERR "write_sigio_workaround - os_pipe 1 failed, "
"err = %d\n", -err);
return;
}
err = os_pipe(l_sigio_private, 1, 1);
if(err < 0){
printk("write_sigio_workaround - os_pipe 2 failed, "
if (err < 0) {
printk(UM_KERN_ERR "write_sigio_workaround - os_pipe 2 failed, "
"err = %d\n", -err);
goto out_close1;
}
p = setup_initial_poll(l_sigio_private[1]);
if(!p)
if (!p)
goto out_close2;
sigio_lock();
/* Did we race? Don't try to optimize this, please, it's not so likely
* to happen, and no more than once at the boot. */
if(write_sigio_pid != -1)
/*
* Did we race? Don't try to optimize this, please, it's not so likely
* to happen, and no more than once at the boot.
*/
if (write_sigio_pid != -1)
goto out_free;
current_poll = ((struct pollfds) { .poll = p,
......@@ -332,19 +346,19 @@ void maybe_sigio_broken(int fd, int read)
{
int err;
if(!isatty(fd))
if (!isatty(fd))
return;
if((read || pty_output_sigio) && (!read || pty_close_sigio))
if ((read || pty_output_sigio) && (!read || pty_close_sigio))
return;
write_sigio_workaround();
sigio_lock();
err = need_poll(&all_sigio_fds, all_sigio_fds.used + 1);
if(err){
printk("maybe_sigio_broken - failed to add pollfd for "
"descriptor %d\n", fd);
if (err) {
printk(UM_KERN_ERR "maybe_sigio_broken - failed to add pollfd "
"for descriptor %d\n", fd);
goto out;
}
......@@ -387,7 +401,7 @@ static void openpty_cb(void *arg)
struct openpty_arg *info = arg;
info->err = 0;
if(openpty(&info->master, &info->slave, NULL, NULL, NULL))
if (openpty(&info->master, &info->slave, NULL, NULL, NULL))
info->err = -errno;
}
......@@ -396,14 +410,14 @@ static int async_pty(int master, int slave)
int flags;
flags = fcntl(master, F_GETFL);
if(flags < 0)
if (flags < 0)
return -errno;
if((fcntl(master, F_SETFL, flags | O_NONBLOCK | O_ASYNC) < 0) ||
(fcntl(master, F_SETOWN, os_getpid()) < 0))
if ((fcntl(master, F_SETFL, flags | O_NONBLOCK | O_ASYNC) < 0) ||
(fcntl(master, F_SETOWN, os_getpid()) < 0))
return -errno;
if((fcntl(slave, F_SETFL, flags | O_NONBLOCK) < 0))
if ((fcntl(slave, F_SETFL, flags | O_NONBLOCK) < 0))
return -errno;
return 0;
......@@ -416,34 +430,49 @@ static void __init check_one_sigio(void (*proc)(int, int))
int master, slave, err;
initial_thread_cb(openpty_cb, &pty);
if(pty.err){
printk("openpty failed, errno = %d\n", -pty.err);
if (pty.err) {
printk(UM_KERN_ERR "check_one_sigio failed, errno = %d\n",
-pty.err);
return;
}
master = pty.master;
slave = pty.slave;
if((master == -1) || (slave == -1)){
printk("openpty failed to allocate a pty\n");
if ((master == -1) || (slave == -1)) {
printk(UM_KERN_ERR "check_one_sigio failed to allocate a "
"pty\n");
return;
}
/* Not now, but complain so we now where we failed. */
err = raw(master);
if (err < 0)
panic("check_sigio : __raw failed, errno = %d\n", -err);
if (err < 0) {
printk(UM_KERN_ERR "check_one_sigio : raw failed, errno = %d\n",
-err);
return;
}
err = async_pty(master, slave);
if(err < 0)
panic("tty_fds : sigio_async failed, err = %d\n", -err);
if (err < 0) {
printk(UM_KERN_ERR "check_one_sigio : sigio_async failed, "
"err = %d\n", -err);
return;
}
if (sigaction(SIGIO, NULL, &old) < 0) {
printk(UM_KERN_ERR "check_one_sigio : sigaction 1 failed, "
"errno = %d\n", errno);
return;
}
if(sigaction(SIGIO, NULL, &old) < 0)
panic("check_sigio : sigaction 1 failed, errno = %d\n", errno);
new = old;
new.sa_handler = handler;
if(sigaction(SIGIO, &new, NULL) < 0)
panic("check_sigio : sigaction 2 failed, errno = %d\n", errno);
if (sigaction(SIGIO, &new, NULL) < 0) {
printk(UM_KERN_ERR "check_one_sigio : sigaction 2 failed, "
"errno = %d\n", errno);
return;
}
got_sigio = 0;
(*proc)(master, slave);
......@@ -451,8 +480,9 @@ static void __init check_one_sigio(void (*proc)(int, int))
close(master);
close(slave);
if(sigaction(SIGIO, &old, NULL) < 0)
panic("check_sigio : sigaction 3 failed, errno = %d\n", errno);
if (sigaction(SIGIO, &old, NULL) < 0)
printk(UM_KERN_ERR "check_one_sigio : sigaction 3 failed, "
"errno = %d\n", errno);
}
static void tty_output(int master, int slave)
......@@ -460,42 +490,45 @@ static void tty_output(int master, int slave)
int n;
char buf[512];
printk("Checking that host ptys support output SIGIO...");
printk(UM_KERN_INFO "Checking that host ptys support output SIGIO...");
memset(buf, 0, sizeof(buf));
while(write(master, buf, sizeof(buf)) > 0) ;
if(errno != EAGAIN)
panic("tty_output : write failed, errno = %d\n", errno);
while(((n = read(slave, buf, sizeof(buf))) > 0) && !got_sigio) ;
while (write(master, buf, sizeof(buf)) > 0) ;
if (errno != EAGAIN)
printk(UM_KERN_ERR "tty_output : write failed, errno = %d\n",
errno);
while (((n = read(slave, buf, sizeof(buf))) > 0) && !got_sigio)
;
if(got_sigio){
printk("Yes\n");
if (got_sigio) {
printk(UM_KERN_CONT "Yes\n");
pty_output_sigio = 1;
}
else if(n == -EAGAIN)
printk("No, enabling workaround\n");
else panic("tty_output : read failed, err = %d\n", n);
} else if (n == -EAGAIN)
printk(UM_KERN_CONT "No, enabling workaround\n");
else
printk(UM_KERN_CONT "tty_output : read failed, err = %d\n", n);
}
static void tty_close(int master, int slave)
{
printk("Checking that host ptys support SIGIO on close...");
printk(UM_KERN_INFO "Checking that host ptys support SIGIO on "
"close...");
close(slave);
if(got_sigio){
printk("Yes\n");
if (got_sigio) {
printk(UM_KERN_CONT "Yes\n");
pty_close_sigio = 1;
}
else printk("No, enabling workaround\n");
} else
printk(UM_KERN_CONT "No, enabling workaround\n");
}
void __init check_sigio(void)
{
if((os_access("/dev/ptmx", OS_ACC_R_OK) < 0) &&
(os_access("/dev/ptyp0", OS_ACC_R_OK) < 0)){
printk("No pseudo-terminals available - skipping pty SIGIO "
"check\n");
if ((access("/dev/ptmx", R_OK) < 0) &&
(access("/dev/ptyp0", R_OK) < 0)) {
printk(UM_KERN_WARNING "No pseudo-terminals available - "
"skipping pty SIGIO check\n");
return;
}
check_one_sigio(tty_output);
......
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