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: Jeff Dike <jdike@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Jeff Dike
Linus Torvalds
parent
260c0cb886
commit
fee64d3c15
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@ -1,22 +1,19 @@
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/*
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* Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com)
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* Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
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* Licensed under the GPL
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*/
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#include <stdlib.h>
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#include <unistd.h>
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#include <errno.h>
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#include <poll.h>
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#include <signal.h>
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#include <string.h>
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#include <sys/poll.h>
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#include <sys/types.h>
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#include <sys/time.h>
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#include "user.h"
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#include "process.h"
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#include "sigio.h"
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#include "irq_user.h"
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#include "kern_constants.h"
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#include "os.h"
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#include "process.h"
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#include "um_malloc.h"
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#include "user.h"
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/*
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* Locked by irq_lock in arch/um/kernel/irq.c. Changed by os_create_pollfd
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@ -35,7 +32,7 @@ int os_waiting_for_events(struct irq_fd *active_fds)
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if (n < 0) {
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err = -errno;
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if (errno != EINTR)
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printk("sigio_handler: os_waiting_for_events:"
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printk(UM_KERN_ERR "os_waiting_for_events:"
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" poll returned %d, errno = %d\n", n, errno);
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return err;
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}
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@ -94,15 +91,17 @@ void os_free_irq_by_cb(int (*test)(struct irq_fd *, void *), void *arg,
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struct irq_fd *old_fd = *prev;
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if ((pollfds[i].fd != -1) &&
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(pollfds[i].fd != (*prev)->fd)) {
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printk("os_free_irq_by_cb - mismatch between "
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"active_fds and pollfds, fd %d vs %d\n",
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printk(UM_KERN_ERR "os_free_irq_by_cb - "
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"mismatch between active_fds and "
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"pollfds, fd %d vs %d\n",
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(*prev)->fd, pollfds[i].fd);
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goto out;
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}
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pollfds_num--;
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/* This moves the *whole* array after pollfds[i]
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/*
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* This moves the *whole* array after pollfds[i]
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* (though it doesn't spot as such)!
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*/
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memmove(&pollfds[i], &pollfds[i + 1],
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@ -1,33 +1,33 @@
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/*
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* Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
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* Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
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* Licensed under the GPL
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*/
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#include <unistd.h>
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#include <stdlib.h>
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#include <termios.h>
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#include <pty.h>
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#include <signal.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <string.h>
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#include <fcntl.h>
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#include <poll.h>
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#include <pty.h>
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#include <sched.h>
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#include <sys/socket.h>
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#include <sys/poll.h>
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#include "init.h"
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#include "user.h"
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#include <signal.h>
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#include <string.h>
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#include "kern_constants.h"
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#include "kern_util.h"
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#include "sigio.h"
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#include "init.h"
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#include "os.h"
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#include "sigio.h"
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#include "um_malloc.h"
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#include "user.h"
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/* Protected by sigio_lock(), also used by sigio_cleanup, which is an
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/*
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* Protected by sigio_lock(), also used by sigio_cleanup, which is an
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* exitcall.
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*/
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static int write_sigio_pid = -1;
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static unsigned long write_sigio_stack;
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/* These arrays are initialized before the sigio thread is started, and
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/*
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* These arrays are initialized before the sigio thread is started, and
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* the descriptors closed after it is killed. So, it can't see them change.
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* On the UML side, they are changed under the sigio_lock.
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*/
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@ -42,7 +42,8 @@ struct pollfds {
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int used;
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};
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/* Protected by sigio_lock(). Used by the sigio thread, but the UML thread
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/*
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* Protected by sigio_lock(). Used by the sigio thread, but the UML thread
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* synchronizes with it.
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*/
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static struct pollfds current_poll;
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@ -61,18 +62,21 @@ static int write_sigio_thread(void *unused)
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while (1) {
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n = poll(fds->poll, fds->used, -1);
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if (n < 0) {
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if(errno == EINTR) continue;
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printk("write_sigio_thread : poll returned %d, "
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"errno = %d\n", n, errno);
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if (errno == EINTR)
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continue;
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printk(UM_KERN_ERR "write_sigio_thread : poll returned "
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"%d, errno = %d\n", n, errno);
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}
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for (i = 0; i < fds->used; i++) {
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p = &fds->poll[i];
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if(p->revents == 0) continue;
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if (p->revents == 0)
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continue;
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if (p->fd == sigio_private[1]) {
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CATCH_EINTR(n = read(sigio_private[1], &c,
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sizeof(c)));
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if (n != sizeof(c))
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printk("write_sigio_thread : "
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printk(UM_KERN_ERR
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"write_sigio_thread : "
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"read on socket failed, "
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"err = %d\n", errno);
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tmp = current_poll;
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@ -89,8 +93,9 @@ static int write_sigio_thread(void *unused)
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CATCH_EINTR(n = write(respond_fd, &c, sizeof(c)));
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if (n != sizeof(c))
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printk("write_sigio_thread : write on socket "
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"failed, err = %d\n", errno);
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printk(UM_KERN_ERR "write_sigio_thread : "
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"write on socket failed, err = %d\n",
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errno);
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}
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}
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@ -106,7 +111,8 @@ static int need_poll(struct pollfds *polls, int n)
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new = kmalloc(n * sizeof(struct pollfd), UM_GFP_ATOMIC);
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if (new == NULL) {
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printk("need_poll : failed to allocate new pollfds\n");
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printk(UM_KERN_ERR "need_poll : failed to allocate new "
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"pollfds\n");
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return -ENOMEM;
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}
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@ -118,7 +124,8 @@ static int need_poll(struct pollfds *polls, int n)
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return 0;
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}
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/* Must be called with sigio_lock held, because it's needed by the marked
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/*
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* Must be called with sigio_lock held, because it's needed by the marked
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* critical section.
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*/
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static void update_thread(void)
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@ -128,15 +135,17 @@ static void update_thread(void)
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char c;
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flags = set_signals(0);
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n = write(sigio_private[0], &c, sizeof(c));
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CATCH_EINTR(n = write(sigio_private[0], &c, sizeof(c)));
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if (n != sizeof(c)) {
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printk("update_thread : write failed, err = %d\n", errno);
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printk(UM_KERN_ERR "update_thread : write failed, err = %d\n",
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errno);
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goto fail;
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}
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CATCH_EINTR(n = read(sigio_private[0], &c, sizeof(c)));
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if (n != sizeof(c)) {
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printk("update_thread : read failed, err = %d\n", errno);
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printk(UM_KERN_ERR "update_thread : read failed, err = %d\n",
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errno);
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goto fail;
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}
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@ -197,7 +206,8 @@ int ignore_sigio_fd(int fd)
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struct pollfd *p;
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int err = 0, i, n = 0;
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/* This is called from exitcalls elsewhere in UML - if
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/*
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* This is called from exitcalls elsewhere in UML - if
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* sigio_cleanup has already run, then update_thread will hang
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* or fail because the thread is no longer running.
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*/
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@ -206,7 +216,8 @@ int ignore_sigio_fd(int fd)
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sigio_lock();
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for (i = 0; i < current_poll.used; i++) {
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if(current_poll.poll[i].fd == fd) break;
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if (current_poll.poll[i].fd == fd)
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break;
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}
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if (i == current_poll.used)
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goto out;
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@ -234,7 +245,8 @@ static struct pollfd *setup_initial_poll(int fd)
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p = kmalloc(sizeof(struct pollfd), UM_GFP_KERNEL);
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if (p == NULL) {
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printk("setup_initial_poll : failed to allocate poll\n");
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printk(UM_KERN_ERR "setup_initial_poll : failed to allocate "
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"poll\n");
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return NULL;
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}
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*p = ((struct pollfd) { .fd = fd,
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@ -261,13 +273,13 @@ static void write_sigio_workaround(void)
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err = os_pipe(l_write_sigio_fds, 1, 1);
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if (err < 0) {
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printk("write_sigio_workaround - os_pipe 1 failed, "
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printk(UM_KERN_ERR "write_sigio_workaround - os_pipe 1 failed, "
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"err = %d\n", -err);
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return;
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}
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err = os_pipe(l_sigio_private, 1, 1);
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if (err < 0) {
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printk("write_sigio_workaround - os_pipe 2 failed, "
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printk(UM_KERN_ERR "write_sigio_workaround - os_pipe 2 failed, "
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"err = %d\n", -err);
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goto out_close1;
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}
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@ -278,8 +290,10 @@ static void write_sigio_workaround(void)
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sigio_lock();
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/* Did we race? Don't try to optimize this, please, it's not so likely
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* to happen, and no more than once at the boot. */
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/*
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* Did we race? Don't try to optimize this, please, it's not so likely
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* to happen, and no more than once at the boot.
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*/
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if (write_sigio_pid != -1)
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goto out_free;
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@ -343,8 +357,8 @@ void maybe_sigio_broken(int fd, int read)
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sigio_lock();
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err = need_poll(&all_sigio_fds, all_sigio_fds.used + 1);
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if (err) {
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printk("maybe_sigio_broken - failed to add pollfd for "
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"descriptor %d\n", fd);
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printk(UM_KERN_ERR "maybe_sigio_broken - failed to add pollfd "
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"for descriptor %d\n", fd);
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goto out;
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}
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@ -417,7 +431,8 @@ static void __init check_one_sigio(void (*proc)(int, int))
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initial_thread_cb(openpty_cb, &pty);
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if (pty.err) {
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printk("openpty failed, errno = %d\n", -pty.err);
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printk(UM_KERN_ERR "check_one_sigio failed, errno = %d\n",
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-pty.err);
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return;
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}
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@ -425,25 +440,39 @@ static void __init check_one_sigio(void (*proc)(int, int))
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slave = pty.slave;
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if ((master == -1) || (slave == -1)) {
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printk("openpty failed to allocate a pty\n");
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printk(UM_KERN_ERR "check_one_sigio failed to allocate a "
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"pty\n");
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return;
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}
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/* Not now, but complain so we now where we failed. */
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err = raw(master);
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if (err < 0)
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panic("check_sigio : __raw failed, errno = %d\n", -err);
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if (err < 0) {
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printk(UM_KERN_ERR "check_one_sigio : raw failed, errno = %d\n",
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-err);
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return;
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}
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err = async_pty(master, slave);
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if(err < 0)
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panic("tty_fds : sigio_async failed, err = %d\n", -err);
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if (err < 0) {
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printk(UM_KERN_ERR "check_one_sigio : sigio_async failed, "
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"err = %d\n", -err);
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return;
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}
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if (sigaction(SIGIO, NULL, &old) < 0) {
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printk(UM_KERN_ERR "check_one_sigio : sigaction 1 failed, "
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"errno = %d\n", errno);
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return;
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}
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if(sigaction(SIGIO, NULL, &old) < 0)
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panic("check_sigio : sigaction 1 failed, errno = %d\n", errno);
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new = old;
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new.sa_handler = handler;
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if(sigaction(SIGIO, &new, NULL) < 0)
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panic("check_sigio : sigaction 2 failed, errno = %d\n", errno);
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if (sigaction(SIGIO, &new, NULL) < 0) {
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printk(UM_KERN_ERR "check_one_sigio : sigaction 2 failed, "
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"errno = %d\n", errno);
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return;
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}
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got_sigio = 0;
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(*proc)(master, slave);
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@ -452,7 +481,8 @@ static void __init check_one_sigio(void (*proc)(int, int))
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close(slave);
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if (sigaction(SIGIO, &old, NULL) < 0)
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panic("check_sigio : sigaction 3 failed, errno = %d\n", errno);
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printk(UM_KERN_ERR "check_one_sigio : sigaction 3 failed, "
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"errno = %d\n", errno);
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}
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static void tty_output(int master, int slave)
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@ -460,42 +490,45 @@ static void tty_output(int master, int slave)
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int n;
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char buf[512];
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printk("Checking that host ptys support output SIGIO...");
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printk(UM_KERN_INFO "Checking that host ptys support output SIGIO...");
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memset(buf, 0, sizeof(buf));
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while (write(master, buf, sizeof(buf)) > 0) ;
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if (errno != EAGAIN)
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panic("tty_output : write failed, errno = %d\n", errno);
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while(((n = read(slave, buf, sizeof(buf))) > 0) && !got_sigio) ;
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printk(UM_KERN_ERR "tty_output : write failed, errno = %d\n",
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errno);
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while (((n = read(slave, buf, sizeof(buf))) > 0) && !got_sigio)
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;
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if (got_sigio) {
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printk("Yes\n");
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printk(UM_KERN_CONT "Yes\n");
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pty_output_sigio = 1;
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}
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else if(n == -EAGAIN)
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printk("No, enabling workaround\n");
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else panic("tty_output : read failed, err = %d\n", n);
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} else if (n == -EAGAIN)
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printk(UM_KERN_CONT "No, enabling workaround\n");
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else
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printk(UM_KERN_CONT "tty_output : read failed, err = %d\n", n);
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}
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static void tty_close(int master, int slave)
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{
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printk("Checking that host ptys support SIGIO on close...");
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printk(UM_KERN_INFO "Checking that host ptys support SIGIO on "
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"close...");
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close(slave);
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if (got_sigio) {
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printk("Yes\n");
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printk(UM_KERN_CONT "Yes\n");
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pty_close_sigio = 1;
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}
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else printk("No, enabling workaround\n");
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} else
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printk(UM_KERN_CONT "No, enabling workaround\n");
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}
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void __init check_sigio(void)
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{
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if((os_access("/dev/ptmx", OS_ACC_R_OK) < 0) &&
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(os_access("/dev/ptyp0", OS_ACC_R_OK) < 0)){
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printk("No pseudo-terminals available - skipping pty SIGIO "
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"check\n");
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if ((access("/dev/ptmx", R_OK) < 0) &&
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(access("/dev/ptyp0", R_OK) < 0)) {
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printk(UM_KERN_WARNING "No pseudo-terminals available - "
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"skipping pty SIGIO check\n");
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return;
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}
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check_one_sigio(tty_output);
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