aboutsummaryrefslogtreecommitdiff
path: root/arch/um
diff options
context:
space:
mode:
Diffstat (limited to 'arch/um')
-rw-r--r--arch/um/drivers/chan_kern.c273
-rw-r--r--arch/um/drivers/line.c298
-rw-r--r--arch/um/drivers/mconsole_kern.c232
-rw-r--r--arch/um/drivers/mconsole_user.c12
-rw-r--r--arch/um/drivers/net_kern.c8
-rw-r--r--arch/um/drivers/ssl.c47
-rw-r--r--arch/um/drivers/stdio_console.c33
-rw-r--r--arch/um/drivers/ubd_kern.c15
-rw-r--r--arch/um/include/chan_kern.h25
-rw-r--r--arch/um/include/choose-mode.h3
-rw-r--r--arch/um/include/irq_user.h13
-rw-r--r--arch/um/include/kern.h13
-rw-r--r--arch/um/include/line.h37
-rw-r--r--arch/um/include/mconsole.h8
-rw-r--r--arch/um/include/os.h17
-rw-r--r--arch/um/include/user_util.h1
-rw-r--r--arch/um/kernel/Makefile6
-rw-r--r--arch/um/kernel/irq_user.c48
-rw-r--r--arch/um/kernel/process_kern.c4
-rw-r--r--arch/um/kernel/sigio_user.c2
-rw-r--r--arch/um/kernel/um_arch.c4
-rw-r--r--arch/um/kernel/umid.c323
-rw-r--r--arch/um/os-Linux/Makefile4
-rw-r--r--arch/um/os-Linux/aio.c467
-rw-r--r--arch/um/os-Linux/umid.c335
25 files changed, 1178 insertions, 1050 deletions
diff --git a/arch/um/drivers/chan_kern.c b/arch/um/drivers/chan_kern.c
index 5b58fad4529..cd13b91b9ff 100644
--- a/arch/um/drivers/chan_kern.c
+++ b/arch/um/drivers/chan_kern.c
@@ -1,4 +1,4 @@
-/*
+/*
* Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com)
* Licensed under the GPL
*/
@@ -58,7 +58,7 @@ static void *not_configged_init(char *str, int device, struct chan_opts *opts)
{
my_puts("Using a channel type which is configured out of "
"UML\n");
- return(NULL);
+ return NULL;
}
static int not_configged_open(int input, int output, int primary, void *data,
@@ -66,7 +66,7 @@ static int not_configged_open(int input, int output, int primary, void *data,
{
my_puts("Using a channel type which is configured out of "
"UML\n");
- return(-ENODEV);
+ return -ENODEV;
}
static void not_configged_close(int fd, void *data)
@@ -79,21 +79,21 @@ static int not_configged_read(int fd, char *c_out, void *data)
{
my_puts("Using a channel type which is configured out of "
"UML\n");
- return(-EIO);
+ return -EIO;
}
static int not_configged_write(int fd, const char *buf, int len, void *data)
{
my_puts("Using a channel type which is configured out of "
"UML\n");
- return(-EIO);
+ return -EIO;
}
static int not_configged_console_write(int fd, const char *buf, int len)
{
my_puts("Using a channel type which is configured out of "
"UML\n");
- return(-EIO);
+ return -EIO;
}
static int not_configged_window_size(int fd, void *data, unsigned short *rows,
@@ -101,7 +101,7 @@ static int not_configged_window_size(int fd, void *data, unsigned short *rows,
{
my_puts("Using a channel type which is configured out of "
"UML\n");
- return(-ENODEV);
+ return -ENODEV;
}
static void not_configged_free(void *data)
@@ -135,17 +135,17 @@ int generic_read(int fd, char *c_out, void *unused)
n = os_read_file(fd, c_out, sizeof(*c_out));
if(n == -EAGAIN)
- return(0);
+ return 0;
else if(n == 0)
- return(-EIO);
- return(n);
+ return -EIO;
+ return n;
}
/* XXX Trivial wrapper around os_write_file */
int generic_write(int fd, const char *buf, int n, void *unused)
{
- return(os_write_file(fd, buf, n));
+ return os_write_file(fd, buf, n);
}
int generic_window_size(int fd, void *unused, unsigned short *rows_out,
@@ -156,14 +156,14 @@ int generic_window_size(int fd, void *unused, unsigned short *rows_out,
ret = os_window_size(fd, &rows, &cols);
if(ret < 0)
- return(ret);
+ return ret;
ret = ((*rows_out != rows) || (*cols_out != cols));
*rows_out = rows;
*cols_out = cols;
- return(ret);
+ return ret;
}
void generic_free(void *data)
@@ -186,25 +186,29 @@ static void tty_receive_char(struct tty_struct *tty, char ch)
}
}
- if((tty->flip.flag_buf_ptr == NULL) ||
+ if((tty->flip.flag_buf_ptr == NULL) ||
(tty->flip.char_buf_ptr == NULL))
return;
tty_insert_flip_char(tty, ch, TTY_NORMAL);
}
-static int open_one_chan(struct chan *chan, int input, int output, int primary)
+static int open_one_chan(struct chan *chan)
{
int fd;
- if(chan->opened) return(0);
- if(chan->ops->open == NULL) fd = 0;
- else fd = (*chan->ops->open)(input, output, primary, chan->data,
- &chan->dev);
- if(fd < 0) return(fd);
+ if(chan->opened)
+ return 0;
+
+ if(chan->ops->open == NULL)
+ fd = 0;
+ else fd = (*chan->ops->open)(chan->input, chan->output, chan->primary,
+ chan->data, &chan->dev);
+ if(fd < 0)
+ return fd;
chan->fd = fd;
chan->opened = 1;
- return(0);
+ return 0;
}
int open_chan(struct list_head *chans)
@@ -215,11 +219,11 @@ int open_chan(struct list_head *chans)
list_for_each(ele, chans){
chan = list_entry(ele, struct chan, list);
- ret = open_one_chan(chan, chan->input, chan->output,
- chan->primary);
- if(chan->primary) err = ret;
+ ret = open_one_chan(chan);
+ if(chan->primary)
+ err = ret;
}
- return(err);
+ return err;
}
void chan_enable_winch(struct list_head *chans, struct tty_struct *tty)
@@ -236,20 +240,65 @@ void chan_enable_winch(struct list_head *chans, struct tty_struct *tty)
}
}
-void enable_chan(struct list_head *chans, struct tty_struct *tty)
+void enable_chan(struct line *line)
{
struct list_head *ele;
struct chan *chan;
- list_for_each(ele, chans){
+ list_for_each(ele, &line->chan_list){
chan = list_entry(ele, struct chan, list);
- if(!chan->opened) continue;
+ if(open_one_chan(chan))
+ continue;
+
+ if(chan->enabled)
+ continue;
+ line_setup_irq(chan->fd, chan->input, chan->output, line,
+ chan);
+ chan->enabled = 1;
+ }
+}
+
+static LIST_HEAD(irqs_to_free);
+
+void free_irqs(void)
+{
+ struct chan *chan;
+
+ while(!list_empty(&irqs_to_free)){
+ chan = list_entry(irqs_to_free.next, struct chan, free_list);
+ list_del(&chan->free_list);
- line_setup_irq(chan->fd, chan->input, chan->output, tty);
+ if(chan->input)
+ free_irq(chan->line->driver->read_irq, chan);
+ if(chan->output)
+ free_irq(chan->line->driver->write_irq, chan);
+ chan->enabled = 0;
+ }
+}
+
+static void close_one_chan(struct chan *chan, int delay_free_irq)
+{
+ if(!chan->opened)
+ return;
+
+ if(delay_free_irq){
+ list_add(&chan->free_list, &irqs_to_free);
}
+ else {
+ if(chan->input)
+ free_irq(chan->line->driver->read_irq, chan);
+ if(chan->output)
+ free_irq(chan->line->driver->write_irq, chan);
+ chan->enabled = 0;
+ }
+ if(chan->ops->close != NULL)
+ (*chan->ops->close)(chan->fd, chan->data);
+
+ chan->opened = 0;
+ chan->fd = -1;
}
-void close_chan(struct list_head *chans)
+void close_chan(struct list_head *chans, int delay_free_irq)
{
struct chan *chan;
@@ -259,15 +308,37 @@ void close_chan(struct list_head *chans)
* so it must be the last closed.
*/
list_for_each_entry_reverse(chan, chans, list) {
- if(!chan->opened) continue;
- if(chan->ops->close != NULL)
- (*chan->ops->close)(chan->fd, chan->data);
- chan->opened = 0;
- chan->fd = -1;
+ close_one_chan(chan, delay_free_irq);
+ }
+}
+
+void deactivate_chan(struct list_head *chans, int irq)
+{
+ struct list_head *ele;
+
+ struct chan *chan;
+ list_for_each(ele, chans) {
+ chan = list_entry(ele, struct chan, list);
+
+ if(chan->enabled && chan->input)
+ deactivate_fd(chan->fd, irq);
+ }
+}
+
+void reactivate_chan(struct list_head *chans, int irq)
+{
+ struct list_head *ele;
+ struct chan *chan;
+
+ list_for_each(ele, chans) {
+ chan = list_entry(ele, struct chan, list);
+
+ if(chan->enabled && chan->input)
+ reactivate_fd(chan->fd, irq);
}
}
-int write_chan(struct list_head *chans, const char *buf, int len,
+int write_chan(struct list_head *chans, const char *buf, int len,
int write_irq)
{
struct list_head *ele;
@@ -285,7 +356,7 @@ int write_chan(struct list_head *chans, const char *buf, int len,
reactivate_fd(chan->fd, write_irq);
}
}
- return(ret);
+ return ret;
}
int console_write_chan(struct list_head *chans, const char *buf, int len)
@@ -301,19 +372,18 @@ int console_write_chan(struct list_head *chans, const char *buf, int len)
n = chan->ops->console_write(chan->fd, buf, len);
if(chan->primary) ret = n;
}
- return(ret);
+ return ret;
}
-int console_open_chan(struct line *line, struct console *co, struct chan_opts *opts)
+int console_open_chan(struct line *line, struct console *co,
+ struct chan_opts *opts)
{
- if (!list_empty(&line->chan_list))
- return 0;
+ int err;
+
+ err = open_chan(&line->chan_list);
+ if(err)
+ return err;
- if (0 != parse_chan_pair(line->init_str, &line->chan_list,
- line->init_pri, co->index, opts))
- return -1;
- if (0 != open_chan(&line->chan_list))
- return -1;
printk("Console initialized on /dev/%s%d\n",co->name,co->index);
return 0;
}
@@ -327,32 +397,36 @@ int chan_window_size(struct list_head *chans, unsigned short *rows_out,
list_for_each(ele, chans){
chan = list_entry(ele, struct chan, list);
if(chan->primary){
- if(chan->ops->window_size == NULL) return(0);
- return(chan->ops->window_size(chan->fd, chan->data,
- rows_out, cols_out));
+ if(chan->ops->window_size == NULL)
+ return 0;
+ return chan->ops->window_size(chan->fd, chan->data,
+ rows_out, cols_out);
}
}
- return(0);
+ return 0;
}
-void free_one_chan(struct chan *chan)
+void free_one_chan(struct chan *chan, int delay_free_irq)
{
list_del(&chan->list);
+
+ close_one_chan(chan, delay_free_irq);
+
if(chan->ops->free != NULL)
(*chan->ops->free)(chan->data);
- free_irq_by_fd(chan->fd);
+
if(chan->primary && chan->output) ignore_sigio_fd(chan->fd);
kfree(chan);
}
-void free_chan(struct list_head *chans)
+void free_chan(struct list_head *chans, int delay_free_irq)
{
struct list_head *ele, *next;
struct chan *chan;
list_for_each_safe(ele, next, chans){
chan = list_entry(ele, struct chan, list);
- free_one_chan(chan);
+ free_one_chan(chan, delay_free_irq);
}
}
@@ -363,23 +437,23 @@ static int one_chan_config_string(struct chan *chan, char *str, int size,
if(chan == NULL){
CONFIG_CHUNK(str, size, n, "none", 1);
- return(n);
+ return n;
}
CONFIG_CHUNK(str, size, n, chan->ops->type, 0);
if(chan->dev == NULL){
CONFIG_CHUNK(str, size, n, "", 1);
- return(n);
+ return n;
}
CONFIG_CHUNK(str, size, n, ":", 0);
CONFIG_CHUNK(str, size, n, chan->dev, 0);
- return(n);
+ return n;
}
-static int chan_pair_config_string(struct chan *in, struct chan *out,
+static int chan_pair_config_string(struct chan *in, struct chan *out,
char *str, int size, char **error_out)
{
int n;
@@ -390,7 +464,7 @@ static int chan_pair_config_string(struct chan *in, struct chan *out,
if(in == out){
CONFIG_CHUNK(str, size, n, "", 1);
- return(n);
+ return n;
}
CONFIG_CHUNK(str, size, n, ",", 1);
@@ -399,10 +473,10 @@ static int chan_pair_config_string(struct chan *in, struct chan *out,
size -= n;
CONFIG_CHUNK(str, size, n, "", 1);
- return(n);
+ return n;
}
-int chan_config_string(struct list_head *chans, char *str, int size,
+int chan_config_string(struct list_head *chans, char *str, int size,
char **error_out)
{
struct list_head *ele;
@@ -418,7 +492,7 @@ int chan_config_string(struct list_head *chans, char *str, int size,
out = chan;
}
- return(chan_pair_config_string(in, out, str, size, error_out));
+ return chan_pair_config_string(in, out, str, size, error_out);
}
struct chan_type {
@@ -462,7 +536,7 @@ struct chan_type chan_table[] = {
#endif
};
-static struct chan *parse_chan(char *str, int pri, int device,
+static struct chan *parse_chan(struct line *line, char *str, int device,
struct chan_opts *opts)
{
struct chan_type *entry;
@@ -484,36 +558,42 @@ static struct chan *parse_chan(char *str, int pri, int device,
if(ops == NULL){
my_printf("parse_chan couldn't parse \"%s\"\n",
str);
- return(NULL);
+ return NULL;
}
- if(ops->init == NULL) return(NULL);
+ if(ops->init == NULL)
+ return NULL;
data = (*ops->init)(str, device, opts);
- if(data == NULL) return(NULL);
+ if(data == NULL)
+ return NULL;
chan = kmalloc(sizeof(*chan), GFP_ATOMIC);
- if(chan == NULL) return(NULL);
+ if(chan == NULL)
+ return NULL;
*chan = ((struct chan) { .list = LIST_HEAD_INIT(chan->list),
+ .free_list =
+ LIST_HEAD_INIT(chan->free_list),
+ .line = line,
.primary = 1,
.input = 0,
.output = 0,
.opened = 0,
+ .enabled = 0,
.fd = -1,
- .pri = pri,
.ops = ops,
.data = data });
- return(chan);
+ return chan;
}
-int parse_chan_pair(char *str, struct list_head *chans, int pri, int device,
+int parse_chan_pair(char *str, struct line *line, int device,
struct chan_opts *opts)
{
+ struct list_head *chans = &line->chan_list;
struct chan *new, *chan;
char *in, *out;
if(!list_empty(chans)){
chan = list_entry(chans->next, struct chan, list);
- if(chan->pri >= pri) return(0);
- free_chan(chans);
+ free_chan(chans, 0);
INIT_LIST_HEAD(chans);
}
@@ -522,24 +602,30 @@ int parse_chan_pair(char *str, struct list_head *chans, int pri, int device,
in = str;
*out = '\0';
out++;
- new = parse_chan(in, pri, device, opts);
- if(new == NULL) return(-1);
+ new = parse_chan(line, in, device, opts);
+ if(new == NULL)
+ return -1;
+
new->input = 1;
list_add(&new->list, chans);
- new = parse_chan(out, pri, device, opts);
- if(new == NULL) return(-1);
+ new = parse_chan(line, out, device, opts);
+ if(new == NULL)
+ return -1;
+
list_add(&new->list, chans);
new->output = 1;
}
else {
- new = parse_chan(str, pri, device, opts);
- if(new == NULL) return(-1);
+ new = parse_chan(line, str, device, opts);
+ if(new == NULL)
+ return -1;
+
list_add(&new->list, chans);
new->input = 1;
new->output = 1;
}
- return(0);
+ return 0;
}
int chan_out_fd(struct list_head *chans)
@@ -550,9 +636,9 @@ int chan_out_fd(struct list_head *chans)
list_for_each(ele, chans){
chan = list_entry(ele, struct chan, list);
if(chan->primary && chan->output)
- return(chan->fd);
+ return chan->fd;
}
- return(-1);
+ return -1;
}
void chan_interrupt(struct list_head *chans, struct work_struct *task,
@@ -567,9 +653,9 @@ void chan_interrupt(struct list_head *chans, struct work_struct *task,
chan = list_entry(ele, struct chan, list);
if(!chan->input || (chan->ops->read == NULL)) continue;
do {
- if((tty != NULL) &&
+ if((tty != NULL) &&
(tty->flip.count >= TTY_FLIPBUF_SIZE)){
- schedule_work(task);
+ schedule_delayed_work(task, 1);
goto out;
}
err = chan->ops->read(chan->fd, &c, chan->data);
@@ -582,29 +668,12 @@ void chan_interrupt(struct list_head *chans, struct work_struct *task,
if(chan->primary){
if(tty != NULL)
tty_hangup(tty);
- line_disable(tty, irq);
- close_chan(chans);
- free_chan(chans);
+ close_chan(chans, 1);
return;
}
- else {
- if(chan->ops->close != NULL)
- chan->ops->close(chan->fd, chan->data);
- free_one_chan(chan);
- }
+ else close_one_chan(chan, 1);
}
}
out:
if(tty) tty_flip_buffer_push(tty);
}
-
-/*
- * Overrides for Emacs so that we follow Linus's tabbing style.
- * Emacs will notice this stuff at the end of the file and automatically
- * adjust the settings for this buffer only. This must remain at the end
- * of the file.
- * ---------------------------------------------------------------------------
- * Local variables:
- * c-file-style: "linux"
- * End:
- */
diff --git a/arch/um/drivers/line.c b/arch/um/drivers/line.c
index e0fdffa2d54..46ceb25a995 100644
--- a/arch/um/drivers/line.c
+++ b/arch/um/drivers/line.c
@@ -1,4 +1,4 @@
-/*
+/*
* Copyright (C) 2001, 2002 Jeff Dike (jdike@karaya.com)
* Licensed under the GPL
*/
@@ -23,8 +23,9 @@
static irqreturn_t line_interrupt(int irq, void *data, struct pt_regs *unused)
{
- struct tty_struct *tty = data;
- struct line *line = tty->driver_data;
+ struct chan *chan = data;
+ struct line *line = chan->line;
+ struct tty_struct *tty = line->tty;
if (line)
chan_interrupt(&line->chan_list, &line->task, tty, irq);
@@ -33,10 +34,11 @@ static irqreturn_t line_interrupt(int irq, void *data, struct pt_regs *unused)
static void line_timer_cb(void *arg)
{
- struct tty_struct *tty = arg;
- struct line *line = tty->driver_data;
+ struct line *line = arg;
- line_interrupt(line->driver->read_irq, arg, NULL);
+ if(!line->throttled)
+ chan_interrupt(&line->chan_list, &line->task, line->tty,
+ line->driver->read_irq);
}
/* Returns the free space inside the ring buffer of this line.
@@ -124,7 +126,8 @@ static int buffer_data(struct line *line, const char *buf, int len)
if (len < end){
memcpy(line->tail, buf, len);
line->tail += len;
- } else {
+ }
+ else {
/* The circular buffer is wrapping */
memcpy(line->tail, buf, end);
buf += end;
@@ -170,7 +173,7 @@ static int flush_buffer(struct line *line)
}
count = line->tail - line->head;
- n = write_chan(&line->chan_list, line->head, count,
+ n = write_chan(&line->chan_list, line->head, count,
line->driver->write_irq);
if(n < 0)
@@ -227,7 +230,7 @@ int line_write(struct tty_struct *tty, const unsigned char *buf, int len)
if (err <= 0 && (err != -EAGAIN || !ret))
ret = err;
} else {
- n = write_chan(&line->chan_list, buf, len,
+ n = write_chan(&line->chan_list, buf, len,
line->driver->write_irq);
if (n < 0) {
ret = n;
@@ -338,11 +341,36 @@ int line_ioctl(struct tty_struct *tty, struct file * file,
return ret;
}
+void line_throttle(struct tty_struct *tty)
+{
+ struct line *line = tty->driver_data;
+
+ deactivate_chan(&line->chan_list, line->driver->read_irq);
+ line->throttled = 1;
+}
+
+void line_unthrottle(struct tty_struct *tty)
+{
+ struct line *line = tty->driver_data;
+
+ line->throttled = 0;
+ chan_interrupt(&line->chan_list, &line->task, tty,
+ line->driver->read_irq);
+
+ /* Maybe there is enough stuff pending that calling the interrupt
+ * throttles us again. In this case, line->throttled will be 1
+ * again and we shouldn't turn the interrupt back on.
+ */
+ if(!line->throttled)
+ reactivate_chan(&line->chan_list, line->driver->read_irq);
+}
+
static irqreturn_t line_write_interrupt(int irq, void *data,
struct pt_regs *unused)
{
- struct tty_struct *tty = data;
- struct line *line = tty->driver_data;
+ struct chan *chan = data;
+ struct line *line = chan->line;
+ struct tty_struct *tty = line->tty;
int err;
/* Interrupts are enabled here because we registered the interrupt with
@@ -364,7 +392,7 @@ static irqreturn_t line_write_interrupt(int irq, void *data,
if (test_bit(TTY_DO_WRITE_WAKEUP, &tty->flags) &&
(tty->ldisc.write_wakeup != NULL))
(tty->ldisc.write_wakeup)(tty);
-
+
/* BLOCKING mode
* In blocking mode, everything sleeps on tty->write_wait.
* Sleeping in the console driver would break non-blocking
@@ -376,53 +404,29 @@ static irqreturn_t line_write_interrupt(int irq, void *data,
return IRQ_HANDLED;
}
-int line_setup_irq(int fd, int input, int output, struct tty_struct *tty)
+int line_setup_irq(int fd, int input, int output, struct line *line, void *data)
{
- struct line *line = tty->driver_data;
struct line_driver *driver = line->driver;
int err = 0, flags = SA_INTERRUPT | SA_SHIRQ | SA_SAMPLE_RANDOM;
if (input)
err = um_request_irq(driver->read_irq, fd, IRQ_READ,
- line_interrupt, flags,
- driver->read_irq_name, tty);
+ line_interrupt, flags,
+ driver->read_irq_name, data);
if (err)
return err;
if (output)
err = um_request_irq(driver->write_irq, fd, IRQ_WRITE,
- line_write_interrupt, flags,
- driver->write_irq_name, tty);
+ line_write_interrupt, flags,
+ driver->write_irq_name, data);
line->have_irq = 1;
return err;
}
-void line_disable(struct tty_struct *tty, int current_irq)
-{
- struct line *line = tty->driver_data;
-
- if(!line->have_irq)
- return;
-
- if(line->driver->read_irq == current_irq)
- free_irq_later(line->driver->read_irq, tty);
- else {
- free_irq(line->driver->read_irq, tty);
- }
-
- if(line->driver->write_irq == current_irq)
- free_irq_later(line->driver->write_irq, tty);
- else {
- free_irq(line->driver->write_irq, tty);
- }
-
- line->have_irq = 0;
-}
-
-int line_open(struct line *lines, struct tty_struct *tty,
- struct chan_opts *opts)
+int line_open(struct line *lines, struct tty_struct *tty)
{
struct line *line;
- int err = 0;
+ int err = -ENODEV;
line = &lines[tty->index];
tty->driver_data = line;
@@ -430,31 +434,29 @@ int line_open(struct line *lines, struct tty_struct *tty,
/* The IRQ which takes this lock is not yet enabled and won't be run
* before the end, so we don't need to use spin_lock_irq.*/
spin_lock(&line->lock);
- if (tty->count == 1) {
- if (!line->valid) {
- err = -ENODEV;
- goto out;
- }
- if (list_empty(&line->chan_list)) {
- err = parse_chan_pair(line->init_str, &line->chan_list,
- line->init_pri, tty->index, opts);
- if(err) goto out;
- err = open_chan(&line->chan_list);
- if(err) goto out;
+
+ tty->driver_data = line;
+ line->tty = tty;
+ if(!line->valid)
+ goto out;
+
+ if(tty->count == 1){
+ /* Here the device is opened, if necessary, and interrupt
+ * is registered.
+ */
+ enable_chan(line);
+ INIT_WORK(&line->task, line_timer_cb, line);
+
+ if(!line->sigio){
+ chan_enable_winch(&line->chan_list, tty);
+ line->sigio = 1;
}
- /* Here the interrupt is registered.*/
- enable_chan(&line->chan_list, tty);
- INIT_WORK(&line->task, line_timer_cb, tty);
- }
- if(!line->sigio){
- chan_enable_winch(&line->chan_list, tty);
- line->sigio = 1;
+ chan_window_size(&line->chan_list, &tty->winsize.ws_row,
+ &tty->winsize.ws_col);
}
- chan_window_size(&line->chan_list, &tty->winsize.ws_row,
- &tty->winsize.ws_col);
- line->count++;
+ err = 0;
out:
spin_unlock(&line->lock);
return err;
@@ -474,15 +476,14 @@ void line_close(struct tty_struct *tty, struct file * filp)
/* We ignore the error anyway! */
flush_buffer(line);
- line->count--;
- if (tty->count == 1) {
- line_disable(tty, -1);
+ if(tty->count == 1){
+ line->tty = NULL;
tty->driver_data = NULL;
- }
- if((line->count == 0) && line->sigio){
- unregister_winch(tty);
- line->sigio = 0;
+ if(line->sigio){
+ unregister_winch(tty);
+ line->sigio = 0;
+ }
}
spin_unlock_irq(&line->lock);
@@ -493,17 +494,15 @@ void close_lines(struct line *lines, int nlines)
int i;
for(i = 0; i < nlines; i++)
- close_chan(&lines[i].chan_list);
+ close_chan(&lines[i].chan_list, 0);
}
/* Common setup code for both startup command line and mconsole initialization.
* @lines contains the the array (of size @num) to modify;
* @init is the setup string;
- * @all_allowed is a boolean saying if we can setup the whole @lines
- * at once. For instance, it will be usually true for startup init. (where we
- * can use con=xterm) and false for mconsole.*/
+ */
-int line_setup(struct line *lines, unsigned int num, char *init, int all_allowed)
+int line_setup(struct line *lines, unsigned int num, char *init)
{
int i, n;
char *end;
@@ -512,10 +511,11 @@ int line_setup(struct line *lines, unsigned int num, char *init, int all_allowed
/* We said con=/ssl= instead of con#=, so we are configuring all
* consoles at once.*/
n = -1;
- } else {
+ }
+ else {
n = simple_strtoul(init, &end, 0);
if(*end != '='){
- printk(KERN_ERR "line_setup failed to parse \"%s\"\n",
+ printk(KERN_ERR "line_setup failed to parse \"%s\"\n",
init);
return 0;
}
@@ -527,8 +527,9 @@ int line_setup(struct line *lines, unsigned int num, char *init, int all_allowed
printk("line_setup - %d out of range ((0 ... %d) allowed)\n",
n, num - 1);
return 0;
- } else if (n >= 0){
- if (lines[n].count > 0) {
+ }
+ else if (n >= 0){
+ if (lines[n].tty != NULL) {
printk("line_setup - device %d is open\n", n);
return 0;
}
@@ -539,13 +540,10 @@ int line_setup(struct line *lines, unsigned int num, char *init, int all_allowed
else {
lines[n].init_str = init;
lines[n].valid = 1;
- }
+ }
}
- } else if(!all_allowed){
- printk("line_setup - can't configure all devices from "
- "mconsole\n");
- return 0;
- } else {
+ }
+ else {
for(i = 0; i < num; i++){
if(lines[i].init_pri <= INIT_ALL){
lines[i].init_pri = INIT_ALL;
@@ -557,18 +555,33 @@ int line_setup(struct line *lines, unsigned int num, char *init, int all_allowed
}
}
}
- return 1;
+ return n == -1 ? num : n;
}
-int line_config(struct line *lines, unsigned int num, char *str)
+int line_config(struct line *lines, unsigned int num, char *str,
+ struct chan_opts *opts)
{
- char *new = uml_strdup(str);
+ struct line *line;
+ char *new;
+ int n;
+ if(*str == '='){
+ printk("line_config - can't configure all devices from "
+ "mconsole\n");
+ return 1;
+ }
+
+ new = kstrdup(str, GFP_KERNEL);
if(new == NULL){
- printk("line_config - uml_strdup failed\n");
- return -ENOMEM;
+ printk("line_config - kstrdup failed\n");
+ return 1;
}
- return !line_setup(lines, num, new, 0);
+ n = line_setup(lines, num, new);
+ if(n < 0)
+ return 1;
+
+ line = &lines[n];
+ return parse_chan_pair(line->init_str, line, n, opts);
}
int line_get_config(char *name, struct line *lines, unsigned int num, char *str,
@@ -594,7 +607,7 @@ int line_get_config(char *name, struct line *lines, unsigned int num, char *str,
spin_lock(&line->lock);
if(!line->valid)
CONFIG_CHUNK(str, size, n, "none", 1);
- else if(line->count == 0)
+ else if(line->tty == NULL)
CONFIG_CHUNK(str, size, n, line->init_str, 1);
else n = chan_config_string(&line->chan_list, str, size, error_out);
spin_unlock(&line->lock);
@@ -619,14 +632,18 @@ int line_id(char **str, int *start_out, int *end_out)
int line_remove(struct line *lines, unsigned int num, int n)
{
+ int err;
char config[sizeof("conxxxx=none\0")];
sprintf(config, "%d=none", n);
- return !line_setup(lines, num, config, 0);
+ err = line_setup(lines, num, config);
+ if(err >= 0)
+ err = 0;
+ return err;
}
struct tty_driver *line_register_devfs(struct lines *set,
- struct line_driver *line_driver,
+ struct line_driver *line_driver,
struct tty_operations *ops, struct line *lines,
int nlines)
{
@@ -655,7 +672,7 @@ struct tty_driver *line_register_devfs(struct lines *set,
}
for(i = 0; i < nlines; i++){
- if(!lines[i].valid)
+ if(!lines[i].valid)
tty_unregister_device(driver, i);
}
@@ -663,24 +680,28 @@ struct tty_driver *line_register_devfs(struct lines *set,
return driver;
}
-static spinlock_t winch_handler_lock;
-LIST_HEAD(winch_handlers);
+static DEFINE_SPINLOCK(winch_handler_lock);
+static LIST_HEAD(winch_handlers);
-void lines_init(struct line *lines, int nlines)
+void lines_init(struct line *lines, int nlines, struct chan_opts *opts)
{
struct line *line;
int i;
- spin_lock_init(&winch_handler_lock);
for(i = 0; i < nlines; i++){
line = &lines[i];
INIT_LIST_HEAD(&line->chan_list);
- spin_lock_init(&line->lock);
- if(line->init_str != NULL){
- line->init_str = uml_strdup(line->init_str);
- if(line->init_str == NULL)
- printk("lines_init - uml_strdup returned "
- "NULL\n");
+
+ if(line->init_str == NULL)
+ continue;
+
+ line->init_str = kstrdup(line->init_str, GFP_KERNEL);
+ if(line->init_str == NULL)
+ printk("lines_init - kstrdup returned NULL\n");
+
+ if(parse_chan_pair(line->init_str, line, i, opts)){
+ printk("parse_chan_pair failed for device %d\n", i);
+ line->valid = 0;
}
}
}
@@ -717,8 +738,7 @@ irqreturn_t winch_interrupt(int irq, void *data, struct pt_regs *unused)
tty = winch->tty;
if (tty != NULL) {
line = tty->driver_data;
- chan_window_size(&line->chan_list,
- &tty->winsize.ws_row,
+ chan_window_size(&line->chan_list, &tty->winsize.ws_row,
&tty->winsize.ws_col);
kill_pg(tty->pgrp, SIGWINCH, 1);
}
@@ -749,60 +769,54 @@ void register_winch_irq(int fd, int tty_fd, int pid, struct tty_struct *tty)
spin_unlock(&winch_handler_lock);
if(um_request_irq(WINCH_IRQ, fd, IRQ_READ, winch_interrupt,
- SA_INTERRUPT | SA_SHIRQ | SA_SAMPLE_RANDOM,
+ SA_INTERRUPT | SA_SHIRQ | SA_SAMPLE_RANDOM,
"winch", winch) < 0)
printk("register_winch_irq - failed to register IRQ\n");
}
+static void free_winch(struct winch *winch)
+{
+ list_del(&winch->list);
+
+ if(winch->pid != -1)
+ os_kill_process(winch->pid, 1);
+ if(winch->fd != -1)
+ os_close_file(winch->fd);
+
+ free_irq(WINCH_IRQ, winch);
+ kfree(winch);
+}
+
static void unregister_winch(struct tty_struct *tty)
{
struct list_head *ele;
- struct winch *winch, *found = NULL;
+ struct winch *winch;
spin_lock(&winch_handler_lock);
+
list_for_each(ele, &winch_handlers){
winch = list_entry(ele, struct winch, list);
if(winch->tty == tty){
- found = winch;
- break;
+ free_winch(winch);
+ break;
}
}
- if(found == NULL)
- goto err;
-
- list_del(&winch->list);
- spin_unlock(&winch_handler_lock);
-
- if(winch->pid != -1)
- os_kill_process(winch->pid, 1);
-
- free_irq(WINCH_IRQ, winch);
- kfree(winch);
-
- return;
-err:
spin_unlock(&winch_handler_lock);
}
-/* XXX: No lock as it's an exitcall... is this valid? Depending on cleanup
- * order... are we sure that nothing else is done on the list? */
static void winch_cleanup(void)
{
- struct list_head *ele;
+ struct list_head *ele, *next;
struct winch *winch;
- list_for_each(ele, &winch_handlers){
+ spin_lock(&winch_handler_lock);
+
+ list_for_each_safe(ele, next, &winch_handlers){
winch = list_entry(ele, struct winch, list);
- if(winch->fd != -1){
- /* Why is this different from the above free_irq(),
- * which deactivates SIGIO? This searches the FD
- * somewhere else and removes it from the list... */
- deactivate_fd(winch->fd, WINCH_IRQ);
- os_close_file(winch->fd);
- }
- if(winch->pid != -1)
- os_kill_process(winch->pid, 1);
+ free_winch(winch);
}
+
+ spin_unlock(&winch_handler_lock);
}
__uml_exitcall(winch_cleanup);
@@ -811,10 +825,10 @@ char *add_xterm_umid(char *base)
char *umid, *title;
int len;
- umid = get_umid(1);
- if(umid == NULL)
+ umid = get_umid();
+ if(*umid == '\0')
return base;
-
+
len = strlen(base) + strlen(" ()") + strlen(umid) + 1;
title = kmalloc(len, GFP_KERNEL);
if(title == NULL){
diff --git a/arch/um/drivers/mconsole_kern.c b/arch/um/drivers/mconsole_kern.c
index 12c95368124..be610125429 100644
--- a/arch/um/drivers/mconsole_kern.c
+++ b/arch/um/drivers/mconsole_kern.c
@@ -20,6 +20,7 @@
#include "linux/namei.h"
#include "linux/proc_fs.h"
#include "linux/syscalls.h"
+#include "linux/console.h"
#include "asm/irq.h"
#include "asm/uaccess.h"
#include "user_util.h"
@@ -34,7 +35,7 @@
#include "irq_kern.h"
#include "choose-mode.h"
-static int do_unlink_socket(struct notifier_block *notifier,
+static int do_unlink_socket(struct notifier_block *notifier,
unsigned long what, void *data)
{
return(mconsole_unlink_socket());
@@ -46,12 +47,12 @@ static struct notifier_block reboot_notifier = {
.priority = 0,
};
-/* Safe without explicit locking for now. Tasklets provide their own
+/* Safe without explicit locking for now. Tasklets provide their own
* locking, and the interrupt handler is safe because it can't interrupt
* itself and it can only happen on CPU 0.
*/
-LIST_HEAD(mc_requests);
+static LIST_HEAD(mc_requests);
static void mc_work_proc(void *unused)
{
@@ -60,7 +61,7 @@ static void mc_work_proc(void *unused)
while(!list_empty(&mc_requests)){
local_save_flags(flags);
- req = list_entry(mc_requests.next, struct mconsole_entry,
+ req = list_entry(mc_requests.next, struct mconsole_entry,
list);
list_del(&req->list);
local_irq_restore(flags);
@@ -69,7 +70,7 @@ static void mc_work_proc(void *unused)
}
}
-DECLARE_WORK(mconsole_work, mc_work_proc, NULL);
+static DECLARE_WORK(mconsole_work, mc_work_proc, NULL);
static irqreturn_t mconsole_interrupt(int irq, void *dev_id,
struct pt_regs *regs)
@@ -103,8 +104,8 @@ void mconsole_version(struct mc_request *req)
{
char version[256];
- sprintf(version, "%s %s %s %s %s", system_utsname.sysname,
- system_utsname.nodename, system_utsname.release,
+ sprintf(version, "%s %s %s %s %s", system_utsname.sysname,
+ system_utsname.nodename, system_utsname.release,
system_utsname.version, system_utsname.machine);
mconsole_reply(req, version, 0, 0);
}
@@ -348,7 +349,7 @@ static struct mc_device *mconsole_find_dev(char *name)
#define CONFIG_BUF_SIZE 64
-static void mconsole_get_config(int (*get_config)(char *, char *, int,
+static void mconsole_get_config(int (*get_config)(char *, char *, int,
char **),
struct mc_request *req, char *name)
{
@@ -389,7 +390,6 @@ static void mconsole_get_config(int (*get_config)(char *, char *, int,
out:
if(buf != default_buf)
kfree(buf);
-
}
void mconsole_config(struct mc_request *req)
@@ -420,9 +420,9 @@ void mconsole_config(struct mc_request *req)
void mconsole_remove(struct mc_request *req)
{
- struct mc_device *dev;
+ struct mc_device *dev;
char *ptr = req->request.data, *err_msg = "";
- char error[256];
+ char error[256];
int err, start, end, n;
ptr += strlen("remove");
@@ -433,37 +433,112 @@ void mconsole_remove(struct mc_request *req)
return;
}
- ptr = &ptr[strlen(dev->name)];
-
- err = 1;
- n = (*dev->id)(&ptr, &start, &end);
- if(n < 0){
- err_msg = "Couldn't parse device number";
- goto out;
- }
- else if((n < start) || (n > end)){
- sprintf(error, "Invalid device number - must be between "
- "%d and %d", start, end);
- err_msg = error;
- goto out;
- }
+ ptr = &ptr[strlen(dev->name)];
+
+ err = 1;
+ n = (*dev->id)(&ptr, &start, &end);
+ if(n < 0){
+ err_msg = "Couldn't parse device number";
+ goto out;
+ }
+ else if((n < start) || (n > end)){
+ sprintf(error, "Invalid device number - must be between "
+ "%d and %d", start, end);
+ err_msg = error;
+ goto out;
+ }
err = (*dev->remove)(n);
- switch(err){
- case -ENODEV:
- err_msg = "Device doesn't exist";
- break;
- case -EBUSY:
- err_msg = "Device is currently open";
- break;
- default:
- break;
- }
- out:
+ switch(err){
+ case -ENODEV:
+ err_msg = "Device doesn't exist";
+ break;
+ case -EBUSY:
+ err_msg = "Device is currently open";
+ break;
+ default:
+ break;
+ }
+out:
mconsole_reply(req, err_msg, err, 0);
}
+static DEFINE_SPINLOCK(console_lock);
+static LIST_HEAD(clients);
+static char console_buf[MCONSOLE_MAX_DATA];
+static int console_index = 0;
+
+static void console_write(struct console *console, const char *string,
+ unsigned len)
+{
+ struct list_head *ele;
+ int n;
+
+ if(list_empty(&clients))
+ return;
+
+ while(1){
+ n = min(len, ARRAY_SIZE(console_buf) - console_index);
+ strncpy(&console_buf[console_index], string, n);
+ console_index += n;
+ string += n;
+ len -= n;
+ if(len == 0)
+ return;
+
+ list_for_each(ele, &clients){
+ struct mconsole_entry *entry;
+
+ entry = list_entry(ele, struct mconsole_entry, list);
+ mconsole_reply_len(&entry->request, console_buf,
+ console_index, 0, 1);
+ }
+
+ console_index = 0;
+ }
+}
+
+static struct console mc_console = { .name = "mc",
+ .write = console_write,
+ .flags = CON_PRINTBUFFER | CON_ENABLED,
+ .index = -1 };
+
+static int mc_add_console(void)
+{
+ register_console(&mc_console);
+ return 0;
+}
+
+late_initcall(mc_add_console);
+
+static void with_console(struct mc_request *req, void (*proc)(void *),
+ void *arg)
+{
+ struct mconsole_entry entry;
+ unsigned long flags;
+
+ INIT_LIST_HEAD(&entry.list);
+ entry.request = *req;
+ list_add(&entry.list, &clients);
+ spin_lock_irqsave(&console_lock, flags);
+
+ (*proc)(arg);
+
+ mconsole_reply_len(req, console_buf, console_index, 0, 0);
+ console_index = 0;
+
+ spin_unlock_irqrestore(&console_lock, flags);
+ list_del(&entry.list);
+}
+
#ifdef CONFIG_MAGIC_SYSRQ
+static void sysrq_proc(void *arg)
+{
+ char *op = arg;
+
+ handle_sysrq(*op, &current->thread.regs, NULL);
+}
+
void mconsole_sysrq(struct mc_request *req)
{
char *ptr = req->request.data;
@@ -471,8 +546,13 @@ void mconsole_sysrq(struct mc_request *req)
ptr += strlen("sysrq");
while(isspace(*ptr)) ptr++;
- mconsole_reply(req, "", 0, 0);
- handle_sysrq(*ptr, &current->thread.regs, NULL);
+ /* With 'b', the system will shut down without a chance to reply,
+ * so in this case, we reply first.
+ */
+ if(*ptr == 'b')
+ mconsole_reply(req, "", 0, 0);
+
+ with_console(req, sysrq_proc, ptr);
}
#else
void mconsole_sysrq(struct mc_request *req)
@@ -481,6 +561,14 @@ void mconsole_sysrq(struct mc_request *req)
}
#endif
+static void stack_proc(void *arg)
+{
+ struct task_struct *from = current, *to = arg;
+
+ to->thread.saved_task = from;
+ switch_to(from, to, from);
+}
+
/* Mconsole stack trace
* Added by Allan Graves, Jeff Dike
* Dumps a stacks registers to the linux console.
@@ -488,37 +576,34 @@ void mconsole_sysrq(struct mc_request *req)
*/
void do_stack(struct mc_request *req)
{
- char *ptr = req->request.data;
- int pid_requested= -1;
- struct task_struct *from = NULL;
+ char *ptr = req->request.data;
+ int pid_requested= -1;
+ struct task_struct *from = NULL;
struct task_struct *to = NULL;
- /* Would be nice:
- * 1) Send showregs output to mconsole.
+ /* Would be nice:
+ * 1) Send showregs output to mconsole.
* 2) Add a way to stack dump all pids.
*/
- ptr += strlen("stack");
- while(isspace(*ptr)) ptr++;
-
- /* Should really check for multiple pids or reject bad args here */
- /* What do the arguments in mconsole_reply mean? */
- if(sscanf(ptr, "%d", &pid_requested) == 0){
- mconsole_reply(req, "Please specify a pid", 1, 0);
- return;
- }
+ ptr += strlen("stack");
+ while(isspace(*ptr)) ptr++;
- from = current;
- to = find_task_by_pid(pid_requested);
+ /* Should really check for multiple pids or reject bad args here */
+ /* What do the arguments in mconsole_reply mean? */
+ if(sscanf(ptr, "%d", &pid_requested) == 0){
+ mconsole_reply(req, "Please specify a pid", 1, 0);
+ return;
+ }
- if((to == NULL) || (pid_requested == 0)) {
- mconsole_reply(req, "Couldn't find that pid", 1, 0);
- return;
- }
- to->thread.saved_task = current;
+ from = current;
- switch_to(from, to, from);
- mconsole_reply(req, "Stack Dumped to console and message log", 0, 0);
+ to = find_task_by_pid(pid_requested);
+ if((to == NULL) || (pid_requested == 0)) {
+ mconsole_reply(req, "Couldn't find that pid", 1, 0);
+ return;
+ }
+ with_console(req, stack_proc, to);
}
void mconsole_stack(struct mc_request *req)
@@ -534,9 +619,9 @@ void mconsole_stack(struct mc_request *req)
/* Changed by mconsole_setup, which is __setup, and called before SMP is
* active.
*/
-static char *notify_socket = NULL;
+static char *notify_socket = NULL;
-int mconsole_init(void)
+static int mconsole_init(void)
{
/* long to avoid size mismatch warnings from gcc */
long sock;
@@ -563,16 +648,16 @@ int mconsole_init(void)
}
if(notify_socket != NULL){
- notify_socket = uml_strdup(notify_socket);
+ notify_socket = kstrdup(notify_socket, GFP_KERNEL);
if(notify_socket != NULL)
mconsole_notify(notify_socket, MCONSOLE_SOCKET,
- mconsole_socket_name,
+ mconsole_socket_name,
strlen(mconsole_socket_name) + 1);
else printk(KERN_ERR "mconsole_setup failed to strdup "
"string\n");
}
- printk("mconsole (version %d) initialized on %s\n",
+ printk("mconsole (version %d) initialized on %s\n",
MCONSOLE_VERSION, mconsole_socket_name);
return(0);
}
@@ -585,7 +670,7 @@ static int write_proc_mconsole(struct file *file, const char __user *buffer,
char *buf;
buf = kmalloc(count + 1, GFP_KERNEL);
- if(buf == NULL)
+ if(buf == NULL)
return(-ENOMEM);
if(copy_from_user(buf, buffer, count)){
@@ -661,7 +746,7 @@ static int notify_panic(struct notifier_block *self, unsigned long unused1,
if(notify_socket == NULL) return(0);
- mconsole_notify(notify_socket, MCONSOLE_PANIC, message,
+ mconsole_notify(notify_socket, MCONSOLE_PANIC, message,
strlen(message) + 1);
return(0);
}
@@ -686,14 +771,3 @@ char *mconsole_notify_socket(void)
}
EXPORT_SYMBOL(mconsole_notify_socket);
-
-/*
- * Overrides for Emacs so that we follow Linus's tabbing style.
- * Emacs will notice this stuff at the end of the file and automatically
- * adjust the settings for this buffer only. This must remain at the end
- * of the file.
- * ---------------------------------------------------------------------------
- * Local variables:
- * c-file-style: "linux"
- * End:
- */
diff --git a/arch/um/drivers/mconsole_user.c b/arch/um/drivers/mconsole_user.c
index 310c1f823f2..4b109fe7fff 100644
--- a/arch/um/drivers/mconsole_user.c
+++ b/arch/um/drivers/mconsole_user.c
@@ -122,12 +122,12 @@ int mconsole_get_request(int fd, struct mc_request *req)
return(1);
}
-int mconsole_reply(struct mc_request *req, char *str, int err, int more)
+int mconsole_reply_len(struct mc_request *req, const char *str, int total,
+ int err, int more)
{
struct mconsole_reply reply;
- int total, len, n;
+ int len, n;
- total = strlen(str);
do {
reply.err = err;
@@ -155,6 +155,12 @@ int mconsole_reply(struct mc_request *req, char *str, int err, int more)
return(0);
}
+int mconsole_reply(struct mc_request *req, const char *str, int err, int more)
+{
+ return mconsole_reply_len(req, str, strlen(str), err, more);
+}
+
+
int mconsole_unlink_socket(void)
{
unlink(mconsole_socket_name);
diff --git a/arch/um/drivers/net_kern.c b/arch/um/drivers/net_kern.c
index 84c73a300ac..fb1f9fb9b87 100644
--- a/arch/um/drivers/net_kern.c
+++ b/arch/um/drivers/net_kern.c
@@ -34,7 +34,7 @@
#define DRIVER_NAME "uml-netdev"
static DEFINE_SPINLOCK(opened_lock);
-LIST_HEAD(opened);
+static LIST_HEAD(opened);
static int uml_net_rx(struct net_device *dev)
{
@@ -150,6 +150,7 @@ static int uml_net_close(struct net_device *dev)
if(lp->close != NULL)
(*lp->close)(lp->fd, &lp->user);
lp->fd = -1;
+ list_del(&lp->list);
spin_unlock(&lp->lock);
return 0;
@@ -266,7 +267,7 @@ void uml_net_user_timer_expire(unsigned long _conn)
}
static DEFINE_SPINLOCK(devices_lock);
-static struct list_head devices = LIST_HEAD_INIT(devices);
+static LIST_HEAD(devices);
static struct platform_driver uml_net_driver = {
.driver = {
@@ -586,7 +587,7 @@ static int net_config(char *str)
err = eth_parse(str, &n, &str);
if(err) return(err);
- str = uml_strdup(str);
+ str = kstrdup(str, GFP_KERNEL);
if(str == NULL){
printk(KERN_ERR "net_config failed to strdup string\n");
return(-1);
@@ -715,6 +716,7 @@ static void close_devices(void)
list_for_each(ele, &opened){
lp = list_entry(ele, struct uml_net_private, list);
+ free_irq(lp->dev->irq, lp->dev);
if((lp->close != NULL) && (lp->fd >= 0))
(*lp->close)(lp->fd, &lp->user);
if(lp->remove != NULL) (*lp->remove)(&lp->user);
diff --git a/arch/um/drivers/ssl.c b/arch/um/drivers/ssl.c
index 62e04ecfada..a32ef55cb24 100644
--- a/arch/um/drivers/ssl.c
+++ b/arch/um/drivers/ssl.c
@@ -69,7 +69,7 @@ static struct line_driver driver = {
.name = "ssl",
.config = ssl_config,
.get_config = ssl_get_config,
- .id = line_id,
+ .id = line_id,
.remove = ssl_remove,
},
};
@@ -84,26 +84,23 @@ static struct lines lines = LINES_INIT(NR_PORTS);
static int ssl_config(char *str)
{
- return(line_config(serial_lines,
- sizeof(serial_lines)/sizeof(serial_lines[0]), str));
+ return line_config(serial_lines, ARRAY_SIZE(serial_lines), str, &opts);
}
static int ssl_get_config(char *dev, char *str, int size, char **error_out)
{
- return(line_get_config(dev, serial_lines,
- sizeof(serial_lines)/sizeof(serial_lines[0]),
- str, size, error_out));
+ return line_get_config(dev, serial_lines, ARRAY_SIZE(serial_lines), str,
+ size, error_out);
}
static int ssl_remove(int n)
{
- return line_remove(serial_lines,
- sizeof(serial_lines)/sizeof(serial_lines[0]), n);
+ return line_remove(serial_lines, ARRAY_SIZE(serial_lines), n);
}
int ssl_open(struct tty_struct *tty, struct file *filp)
{
- return line_open(serial_lines, tty, &opts);
+ return line_open(serial_lines, tty);
}
#if 0
@@ -112,16 +109,6 @@ static void ssl_flush_buffer(struct tty_struct *tty)
return;
}
-static void ssl_throttle(struct tty_struct * tty)
-{
- printk(KERN_ERR "Someone should implement ssl_throttle\n");
-}
-
-static void ssl_unthrottle(struct tty_struct * tty)
-{
- printk(KERN_ERR "Someone should implement ssl_unthrottle\n");
-}
-
static void ssl_stop(struct tty_struct *tty)
{
printk(KERN_ERR "Someone should implement ssl_stop\n");
@@ -148,9 +135,9 @@ static struct tty_operations ssl_ops = {
.flush_chars = line_flush_chars,
.set_termios = line_set_termios,
.ioctl = line_ioctl,
+ .throttle = line_throttle,
+ .unthrottle = line_unthrottle,
#if 0
- .throttle = ssl_throttle,
- .unthrottle = ssl_unthrottle,
.stop = ssl_stop,
.start = ssl_start,
.hangup = ssl_hangup,
@@ -183,7 +170,7 @@ static int ssl_console_setup(struct console *co, char *options)
{
struct line *line = &serial_lines[co->index];
- return console_open_chan(line,co,&opts);
+ return console_open_chan(line, co, &opts);
}
static struct console ssl_cons = {
@@ -199,12 +186,13 @@ int ssl_init(void)
{
char *new_title;
- printk(KERN_INFO "Initializing software serial port version %d\n",
+ printk(KERN_INFO "Initializing software serial port version %d\n",
ssl_version);
ssl_driver = line_register_devfs(&lines, &driver, &ssl_ops,
- serial_lines, ARRAY_SIZE(serial_lines));
+ serial_lines,
+ ARRAY_SIZE(serial_lines));
- lines_init(serial_lines, sizeof(serial_lines)/sizeof(serial_lines[0]));
+ lines_init(serial_lines, ARRAY_SIZE(serial_lines), &opts);
new_title = add_xterm_umid(opts.xterm_title);
if (new_title != NULL)
@@ -212,7 +200,7 @@ int ssl_init(void)
ssl_init_done = 1;
register_console(&ssl_cons);
- return(0);
+ return 0;
}
late_initcall(ssl_init);
@@ -220,16 +208,13 @@ static void ssl_exit(void)
{
if (!ssl_init_done)
return;
- close_lines(serial_lines,
- sizeof(serial_lines)/sizeof(serial_lines[0]));
+ close_lines(serial_lines, ARRAY_SIZE(serial_lines));
}
__uml_exitcall(ssl_exit);
static int ssl_chan_setup(char *str)
{
- return(line_setup(serial_lines,
- sizeof(serial_lines)/sizeof(serial_lines[0]),
- str, 1));
+ return line_setup(serial_lines, ARRAY_SIZE(serial_lines), str);
}
__setup("ssl", ssl_chan_setup);
diff --git a/arch/um/drivers/stdio_console.c b/arch/um/drivers/stdio_console.c
index 005aa6333b6..61db8b2fc83 100644
--- a/arch/um/drivers/stdio_console.c
+++ b/arch/um/drivers/stdio_console.c
@@ -75,7 +75,7 @@ static struct line_driver driver = {
.name = "con",
.config = con_config,
.get_config = con_get_config,
- .id = line_id,
+ .id = line_id,
.remove = con_remove,
},
};
@@ -86,28 +86,27 @@ static struct lines console_lines = LINES_INIT(MAX_TTYS);
* individual elements are protected by individual semaphores.
*/
struct line vts[MAX_TTYS] = { LINE_INIT(CONFIG_CON_ZERO_CHAN, &driver),
- [ 1 ... MAX_TTYS - 1 ] =
+ [ 1 ... MAX_TTYS - 1 ] =
LINE_INIT(CONFIG_CON_CHAN, &driver) };
static int con_config(char *str)
{
- return(line_config(vts, sizeof(vts)/sizeof(vts[0]), str));
+ return line_config(vts, ARRAY_SIZE(vts), str, &opts);
}
static int con_get_config(char *dev, char *str, int size, char **error_out)
{
- return(line_get_config(dev, vts, sizeof(vts)/sizeof(vts[0]), str,
- size, error_out));
+ return line_get_config(dev, vts, ARRAY_SIZE(vts), str, size, error_out);
}
static int con_remove(int n)
{
- return line_remove(vts, sizeof(vts)/sizeof(vts[0]), n);
+ return line_remove(vts, ARRAY_SIZE(vts), n);
}
static int con_open(struct tty_struct *tty, struct file *filp)
{
- return line_open(vts, tty, &opts);
+ return line_open(vts, tty);
}
static int con_init_done = 0;
@@ -117,16 +116,18 @@ static struct tty_operations console_ops = {
.close = line_close,
.write = line_write,
.put_char = line_put_char,
- .write_room = line_write_room,
+ .write_room = line_write_room,
.chars_in_buffer = line_chars_in_buffer,
.flush_buffer = line_flush_buffer,
.flush_chars = line_flush_chars,
.set_termios = line_set_termios,
.ioctl = line_ioctl,
+ .throttle = line_throttle,
+ .unthrottle = line_unthrottle,
};
static void uml_console_write(struct console *console, const char *string,
- unsigned len)
+ unsigned len)
{
struct line *line = &vts[console->index];
unsigned long flags;
@@ -146,7 +147,7 @@ static int uml_console_setup(struct console *co, char *options)
{
struct line *line = &vts[co->index];
- return console_open_chan(line,co,&opts);
+ return console_open_chan(line, co, &opts);
}
static struct console stdiocons = {
@@ -156,7 +157,7 @@ static struct console stdiocons = {
.setup = uml_console_setup,
.flags = CON_PRINTBUFFER,
.index = -1,
- .data = &vts,
+ .data = &vts,
};
int stdio_init(void)
@@ -166,11 +167,11 @@ int stdio_init(void)
console_driver = line_register_devfs(&console_lines, &driver,
&console_ops, vts,
ARRAY_SIZE(vts));
- if (NULL == console_driver)
+ if (console_driver == NULL)
return -1;
printk(KERN_INFO "Initialized stdio console driver\n");
- lines_init(vts, sizeof(vts)/sizeof(vts[0]));
+ lines_init(vts, ARRAY_SIZE(vts), &opts);
new_title = add_xterm_umid(opts.xterm_title);
if(new_title != NULL)
@@ -178,7 +179,7 @@ int stdio_init(void)
con_init_done = 1;
register_console(&stdiocons);
- return(0);
+ return 0;
}
late_initcall(stdio_init);
@@ -186,13 +187,13 @@ static void console_exit(void)
{
if (!con_init_done)
return;
- close_lines(vts, sizeof(vts)/sizeof(vts[0]));
+ close_lines(vts, ARRAY_SIZE(vts));
}
__uml_exitcall(console_exit);
static int console_chan_setup(char *str)
{
- return(line_setup(vts, sizeof(vts)/sizeof(vts[0]), str, 1));
+ return line_setup(vts, ARRAY_SIZE(vts), str);
}
__setup("con", console_chan_setup);
__channel_help(console_chan_setup, "con");
diff --git a/arch/um/drivers/ubd_kern.c b/arch/um/drivers/ubd_kern.c
index 93898917cbe..73f9652b2ee 100644
--- a/arch/um/drivers/ubd_kern.c
+++ b/arch/um/drivers/ubd_kern.c
@@ -706,7 +706,7 @@ static int ubd_config(char *str)
{
int n, err;
- str = uml_strdup(str);
+ str = kstrdup(str, GFP_KERNEL);
if(str == NULL){
printk(KERN_ERR "ubd_config failed to strdup string\n");
return(1);
@@ -1387,15 +1387,6 @@ int io_thread(void *arg)
printk("io_thread - write failed, fd = %d, err = %d\n",
kernel_fd, -n);
}
-}
-/*
- * Overrides for Emacs so that we follow Linus's tabbing style.
- * Emacs will notice this stuff at the end of the file and automatically
- * adjust the settings for this buffer only. This must remain at the end
- * of the file.
- * ---------------------------------------------------------------------------
- * Local variables:
- * c-file-style: "linux"
- * End:
- */
+ return 0;
+}
diff --git a/arch/um/include/chan_kern.h b/arch/um/include/chan_kern.h
index da9a6717e7a..1bb5e9d9427 100644
--- a/arch/um/include/chan_kern.h
+++ b/arch/um/include/chan_kern.h
@@ -14,21 +14,23 @@
struct chan {
struct list_head list;
+ struct list_head free_list;
+ struct line *line;
char *dev;
unsigned int primary:1;
unsigned int input:1;
unsigned int output:1;
unsigned int opened:1;
+ unsigned int enabled:1;
int fd;
- enum chan_init_pri pri;
struct chan_ops *ops;
void *data;
};
extern void chan_interrupt(struct list_head *chans, struct work_struct *task,
struct tty_struct *tty, int irq);
-extern int parse_chan_pair(char *str, struct list_head *chans, int pri,
- int device, struct chan_opts *opts);
+extern int parse_chan_pair(char *str, struct line *line, int device,
+ struct chan_opts *opts);
extern int open_chan(struct list_head *chans);
extern int write_chan(struct list_head *chans, const char *buf, int len,
int write_irq);
@@ -36,9 +38,11 @@ extern int console_write_chan(struct list_head *chans, const char *buf,
int len);
extern int console_open_chan(struct line *line, struct console *co,
struct chan_opts *opts);
-extern void close_chan(struct list_head *chans);
+extern void deactivate_chan(struct list_head *chans, int irq);
+extern void reactivate_chan(struct list_head *chans, int irq);
extern void chan_enable_winch(struct list_head *chans, struct tty_struct *tty);
-extern void enable_chan(struct list_head *chans, struct tty_struct *tty);
+extern void enable_chan(struct line *line);
+extern void close_chan(struct list_head *chans, int delay_free_irq);
extern int chan_window_size(struct list_head *chans,
unsigned short *rows_out,
unsigned short *cols_out);
@@ -47,14 +51,3 @@ extern int chan_config_string(struct list_head *chans, char *str, int size,
char **error_out);
#endif
-
-/*
- * Overrides for Emacs so that we follow Linus's tabbing style.
- * Emacs will notice this stuff at the end of the file and automatically
- * adjust the settings for this buffer only. This must remain at the end
- * of the file.
- * ---------------------------------------------------------------------------
- * Local variables:
- * c-file-style: "linux"
- * End:
- */
diff --git a/arch/um/include/choose-mode.h b/arch/um/include/choose-mode.h
index f25fa83a5da..b87b36a87d9 100644
--- a/arch/um/include/choose-mode.h
+++ b/arch/um/include/choose-mode.h
@@ -23,6 +23,9 @@ static inline void *__choose_mode(void *tt, void *skas) {
#elif defined(UML_CONFIG_MODE_TT)
#define CHOOSE_MODE(tt, skas) (tt)
+
+#else
+#error CONFIG_MODE_SKAS and CONFIG_MODE_TT are both disabled
#endif
#define CHOOSE_MODE_PROC(tt, skas, args...) \
diff --git a/arch/um/include/irq_user.h b/arch/um/include/irq_user.h
index f724b717213..b61deb8b362 100644
--- a/arch/um/include/irq_user.h
+++ b/arch/um/include/irq_user.h
@@ -18,19 +18,8 @@ extern int deactivate_all_fds(void);
extern void forward_interrupts(int pid);
extern void init_irq_signals(int on_sigstack);
extern void forward_ipi(int fd, int pid);
-extern void free_irq_later(int irq, void *dev_id);
extern int activate_ipi(int fd, int pid);
extern unsigned long irq_lock(void);
extern void irq_unlock(unsigned long flags);
-#endif
-/*
- * Overrides for Emacs so that we follow Linus's tabbing style.
- * Emacs will notice this stuff at the end of the file and automatically
- * adjust the settings for this buffer only. This must remain at the end
- * of the file.
- * ---------------------------------------------------------------------------
- * Local variables:
- * c-file-style: "linux"
- * End:
- */
+#endif
diff --git a/arch/um/include/kern.h b/arch/um/include/kern.h
index 1e3170768b5..7d223beccbc 100644
--- a/arch/um/include/kern.h
+++ b/arch/um/include/kern.h
@@ -17,7 +17,7 @@ extern int errno;
extern int clone(int (*proc)(void *), void *sp, int flags, void *data);
extern int sleep(int);
-extern int printf(char *fmt, ...);
+extern int printf(const char *fmt, ...);
extern char *strerror(int errnum);
extern char *ptsname(int __fd);
extern int munmap(void *, int);
@@ -35,15 +35,6 @@ extern int read(unsigned int, char *, int);
extern int pipe(int *);
extern int sched_yield(void);
extern int ptrace(int op, int pid, long addr, long data);
+
#endif
-/*
- * Overrides for Emacs so that we follow Linus's tabbing style.
- * Emacs will notice this stuff at the end of the file and automatically
- * adjust the settings for this buffer only. This must remain at the end
- * of the file.
- * ---------------------------------------------------------------------------
- * Local variables:
- * c-file-style: "linux"
- * End:
- */
diff --git a/arch/um/include/line.h b/arch/um/include/line.h
index 5323d22a6ca..6f4d680dc1d 100644
--- a/arch/um/include/line.h
+++ b/arch/um/include/line.h
@@ -32,11 +32,13 @@ struct line_driver {
};
struct line {
+ struct tty_struct *tty;
char *init_str;
int init_pri;
struct list_head chan_list;
int valid;
int count;
+ int throttled;
/*This lock is actually, mostly, local to*/
spinlock_t lock;
@@ -58,14 +60,15 @@ struct line {
#define LINE_INIT(str, d) \
{ init_str : str, \
init_pri : INIT_STATIC, \
- chan_list : { }, \
valid : 1, \
+ throttled : 0, \
+ lock : SPIN_LOCK_UNLOCKED, \
buffer : NULL, \
head : NULL, \
tail : NULL, \
sigio : 0, \
- driver : d, \
- have_irq : 0 }
+ driver : d, \
+ have_irq : 0 }
struct lines {
int num;
@@ -74,11 +77,11 @@ struct lines {
#define LINES_INIT(n) { num : n }
extern void line_close(struct tty_struct *tty, struct file * filp);
-extern int line_open(struct line *lines, struct tty_struct *tty,
- struct chan_opts *opts);
-extern int line_setup(struct line *lines, unsigned int sizeof_lines, char *init,
- int all_allowed);
-extern int line_write(struct tty_struct *tty, const unsigned char *buf, int len);
+extern int line_open(struct line *lines, struct tty_struct *tty);
+extern int line_setup(struct line *lines, unsigned int sizeof_lines,
+ char *init);
+extern int line_write(struct tty_struct *tty, const unsigned char *buf,
+ int len);
extern void line_put_char(struct tty_struct *tty, unsigned char ch);
extern void line_set_termios(struct tty_struct *tty, struct termios * old);
extern int line_chars_in_buffer(struct tty_struct *tty);
@@ -87,23 +90,27 @@ extern void line_flush_chars(struct tty_struct *tty);
extern int line_write_room(struct tty_struct *tty);
extern int line_ioctl(struct tty_struct *tty, struct file * file,
unsigned int cmd, unsigned long arg);
+extern void line_throttle(struct tty_struct *tty);
+extern void line_unthrottle(struct tty_struct *tty);
extern char *add_xterm_umid(char *base);
-extern int line_setup_irq(int fd, int input, int output, struct tty_struct *tty);
+extern int line_setup_irq(int fd, int input, int output, struct line *line,
+ void *data);
extern void line_close_chan(struct line *line);
-extern void line_disable(struct tty_struct *tty, int current_irq);
-extern struct tty_driver * line_register_devfs(struct lines *set,
- struct line_driver *line_driver,
+extern struct tty_driver * line_register_devfs(struct lines *set,
+ struct line_driver *line_driver,
struct tty_operations *driver,
struct line *lines,
int nlines);
-extern void lines_init(struct line *lines, int nlines);
+extern void lines_init(struct line *lines, int nlines, struct chan_opts *opts);
extern void close_lines(struct line *lines, int nlines);
-extern int line_config(struct line *lines, unsigned int sizeof_lines, char *str);
+extern int line_config(struct line *lines, unsigned int sizeof_lines,
+ char *str, struct chan_opts *opts);
extern int line_id(char **str, int *start_out, int *end_out);
extern int line_remove(struct line *lines, unsigned int sizeof_lines, int n);
-extern int line_get_config(char *dev, struct line *lines, unsigned int sizeof_lines, char *str,
+extern int line_get_config(char *dev, struct line *lines,
+ unsigned int sizeof_lines, char *str,
int size, char **error_out);
#endif
diff --git a/arch/um/include/mconsole.h b/arch/um/include/mconsole.h
index b1b512f4703..58f67d39110 100644
--- a/arch/um/include/mconsole.h
+++ b/arch/um/include/mconsole.h
@@ -32,7 +32,7 @@ struct mconsole_reply {
struct mconsole_notify {
u32 magic;
- u32 version;
+ u32 version;
enum { MCONSOLE_SOCKET, MCONSOLE_PANIC, MCONSOLE_HANG,
MCONSOLE_USER_NOTIFY } type;
u32 len;
@@ -66,7 +66,9 @@ struct mc_request
extern char mconsole_socket_name[];
extern int mconsole_unlink_socket(void);
-extern int mconsole_reply(struct mc_request *req, char *reply, int err,
+extern int mconsole_reply_len(struct mc_request *req, const char *reply,
+ int len, int err, int more);
+extern int mconsole_reply(struct mc_request *req, const char *str, int err,
int more);
extern void mconsole_version(struct mc_request *req);
@@ -84,7 +86,7 @@ extern void mconsole_proc(struct mc_request *req);
extern void mconsole_stack(struct mc_request *req);
extern int mconsole_get_request(int fd, struct mc_request *req);
-extern int mconsole_notify(char *sock_name, int type, const void *data,
+extern int mconsole_notify(char *sock_name, int type, const void *data,
int len);
extern char *mconsole_notify_socket(void);
extern void lock_notify(void);
diff --git a/arch/um/include/os.h b/arch/um/include/os.h
index 2cccfa5b8ab..c279ee6d89e 100644
--- a/arch/um/include/os.h
+++ b/arch/um/include/os.h
@@ -213,15 +213,10 @@ extern int run_helper_thread(int (*proc)(void *), void *arg,
int stack_order);
extern int helper_wait(int pid);
-#endif
+/* umid.c */
-/*
- * Overrides for Emacs so that we follow Linus's tabbing style.
- * Emacs will notice this stuff at the end of the file and automatically
- * adjust the settings for this buffer only. This must remain at the end
- * of the file.
- * ---------------------------------------------------------------------------
- * Local variables:
- * c-file-style: "linux"
- * End:
- */
+extern int umid_file_name(char *name, char *buf, int len);
+extern int set_umid(char *name);
+extern char *get_umid(void);
+
+#endif
diff --git a/arch/um/include/user_util.h b/arch/um/include/user_util.h
index bb505e01d99..b9984003e60 100644
--- a/arch/um/include/user_util.h
+++ b/arch/um/include/user_util.h
@@ -64,7 +64,6 @@ extern void setup_machinename(char *machine_out);
extern void setup_hostinfo(void);
extern void do_exec(int old_pid, int new_pid);
extern void tracer_panic(char *msg, ...);
-extern char *get_umid(int only_if_set);
extern void do_longjmp(void *p, int val);
extern int detach(int pid, int sig);
extern int attach(int pid);
diff --git a/arch/um/kernel/Makefile b/arch/um/kernel/Makefile
index 3de9d21e36b..6f7700593a6 100644
--- a/arch/um/kernel/Makefile
+++ b/arch/um/kernel/Makefile
@@ -10,8 +10,8 @@ obj-y = config.o exec_kern.o exitcode.o \
init_task.o irq.o irq_user.o ksyms.o mem.o physmem.o \
process_kern.o ptrace.o reboot.o resource.o sigio_user.o sigio_kern.o \
signal_kern.o signal_user.o smp.o syscall_kern.o sysrq.o time.o \
- time_kern.o tlb.o trap_kern.o trap_user.o uaccess.o um_arch.o \
- umid.o user_util.o
+ time_kern.o tlb.o trap_kern.o trap_user.o uaccess.o um_arch.o umid.o \
+ user_util.o
obj-$(CONFIG_BLK_DEV_INITRD) += initrd.o
obj-$(CONFIG_GPROF) += gprof_syms.o
@@ -24,7 +24,7 @@ obj-$(CONFIG_MODE_SKAS) += skas/
user-objs-$(CONFIG_TTY_LOG) += tty_log.o
-USER_OBJS := $(user-objs-y) config.o time.o tty_log.o umid.o user_util.o
+USER_OBJS := $(user-objs-y) config.o time.o tty_log.o user_util.o
include arch/um/scripts/Makefile.rules
diff --git a/arch/um/kernel/irq_user.c b/arch/um/kernel/irq_user.c
index c3ccaf24f3e..50a2aa35cda 100644
--- a/arch/um/kernel/irq_user.c
+++ b/arch/um/kernel/irq_user.c
@@ -29,7 +29,6 @@ struct irq_fd {
int pid;
int events;
int current_events;
- int freed;
};
static struct irq_fd *active_fds = NULL;
@@ -41,9 +40,11 @@ static int pollfds_size = 0;
extern int io_count, intr_count;
+extern void free_irqs(void);
+
void sigio_handler(int sig, union uml_pt_regs *regs)
{
- struct irq_fd *irq_fd, *next;
+ struct irq_fd *irq_fd;
int i, n;
if(smp_sigio_handler()) return;
@@ -66,29 +67,15 @@ void sigio_handler(int sig, union uml_pt_regs *regs)
irq_fd = irq_fd->next;
}
- for(irq_fd = active_fds; irq_fd != NULL; irq_fd = next){
- next = irq_fd->next;
+ for(irq_fd = active_fds; irq_fd != NULL; irq_fd = irq_fd->next){
if(irq_fd->current_events != 0){
irq_fd->current_events = 0;
do_IRQ(irq_fd->irq, regs);
-
- /* This is here because the next irq may be
- * freed in the handler. If a console goes
- * away, both the read and write irqs will be
- * freed. After do_IRQ, ->next will point to
- * a good IRQ.
- * Irqs can't be freed inside their handlers,
- * so the next best thing is to have them
- * marked as needing freeing, so that they
- * can be freed here.
- */
- next = irq_fd->next;
- if(irq_fd->freed){
- free_irq(irq_fd->irq, irq_fd->id);
- }
}
}
}
+
+ free_irqs();
}
int activate_ipi(int fd, int pid)
@@ -136,8 +123,7 @@ int activate_fd(int irq, int fd, int type, void *dev_id)
.irq = irq,
.pid = pid,
.events = events,
- .current_events = 0,
- .freed = 0 } );
+ .current_events = 0 } );
/* Critical section - locked by a spinlock because this stuff can
* be changed from interrupt handlers. The stuff above is done
@@ -313,26 +299,6 @@ static struct irq_fd *find_irq_by_fd(int fd, int irqnum, int *index_out)
return(irq);
}
-void free_irq_later(int irq, void *dev_id)
-{
- struct irq_fd *irq_fd;
- unsigned long flags;
-
- flags = irq_lock();
- for(irq_fd = active_fds; irq_fd != NULL; irq_fd = irq_fd->next){
- if((irq_fd->irq == irq) && (irq_fd->id == dev_id))
- break;
- }
- if(irq_fd == NULL){
- printk("free_irq_later found no irq, irq = %d, "
- "dev_id = 0x%p\n", irq, dev_id);
- goto out;
- }
- irq_fd->freed = 1;
- out:
- irq_unlock(flags);
-}
-
void reactivate_fd(int fd, int irqnum)
{
struct irq_fd *irq;
diff --git a/arch/um/kernel/process_kern.c b/arch/um/kernel/process_kern.c
index 34b54a3e213..651abf255bc 100644
--- a/arch/um/kernel/process_kern.c
+++ b/arch/um/kernel/process_kern.c
@@ -324,10 +324,6 @@ int user_context(unsigned long sp)
return(stack != (unsigned long) current_thread);
}
-extern void remove_umid_dir(void);
-
-__uml_exitcall(remove_umid_dir);
-
extern exitcall_t __uml_exitcall_begin, __uml_exitcall_end;
void do_uml_exitcalls(void)
diff --git a/arch/um/kernel/sigio_user.c b/arch/um/kernel/sigio_user.c
index 48b1f644b9a..62e5cfdf218 100644
--- a/arch/um/kernel/sigio_user.c
+++ b/arch/um/kernel/sigio_user.c
@@ -216,6 +216,8 @@ static int write_sigio_thread(void *unused)
"err = %d\n", -n);
}
}
+
+ return 0;
}
static int need_poll(int n)
diff --git a/arch/um/kernel/um_arch.c b/arch/um/kernel/um_arch.c
index 142a9493912..26626b2b917 100644
--- a/arch/um/kernel/um_arch.c
+++ b/arch/um/kernel/um_arch.c
@@ -146,8 +146,8 @@ void set_cmdline(char *cmd)
if(CHOOSE_MODE(honeypot, 0)) return;
- umid = get_umid(1);
- if(umid != NULL){
+ umid = get_umid();
+ if(*umid != '\0'){
snprintf(argv1_begin,
(argv1_end - argv1_begin) * sizeof(*ptr),
"(%s) ", umid);
diff --git a/arch/um/kernel/umid.c b/arch/um/kernel/umid.c
index 0b21d59ba0c..4eaee823bfd 100644
--- a/arch/um/kernel/umid.c
+++ b/arch/um/kernel/umid.c
@@ -3,61 +3,30 @@
* Licensed under the GPL
*/
-#include <stdio.h>
-#include <unistd.h>
-#include <errno.h>
-#include <string.h>
-#include <stdlib.h>
-#include <dirent.h>
-#include <signal.h>
-#include <sys/stat.h>
-#include <sys/param.h>
-#include "user.h"
-#include "umid.h"
+#include "asm/errno.h"
#include "init.h"
#include "os.h"
-#include "user_util.h"
-#include "choose-mode.h"
+#include "kern.h"
+#include "linux/kernel.h"
-#define UMID_LEN 64
-#define UML_DIR "~/.uml/"
-
-/* Changed by set_umid and make_umid, which are run early in boot */
-static char umid[UMID_LEN] = { 0 };
-
-/* Changed by set_uml_dir and make_uml_dir, which are run early in boot */
-static char *uml_dir = UML_DIR;
-
-/* Changed by set_umid */
-static int umid_is_random = 1;
+/* Changed by set_umid_arg */
static int umid_inited = 0;
-/* Have we created the files? Should we remove them? */
-static int umid_owned = 0;
-static int make_umid(int (*printer)(const char *fmt, ...));
-
-static int __init set_umid(char *name, int is_random,
- int (*printer)(const char *fmt, ...))
+static int __init set_umid_arg(char *name, int *add)
{
- if(umid_inited){
- (*printer)("Unique machine name can't be set twice\n");
- return(-1);
- }
+ int err;
- if(strlen(name) > UMID_LEN - 1)
- (*printer)("Unique machine name is being truncated to %d "
- "characters\n", UMID_LEN);
- strlcpy(umid, name, sizeof(umid));
+ if(umid_inited)
+ return 0;
- umid_is_random = is_random;
- umid_inited = 1;
- return 0;
-}
-
-static int __init set_umid_arg(char *name, int *add)
-{
*add = 0;
- return(set_umid(name, 0, printf));
+ err = set_umid(name);
+ if(err == -EEXIST)
+ printf("umid '%s' already in use\n", name);
+ else if(!err)
+ umid_inited = 1;
+
+ return 0;
}
__uml_setup("umid=", set_umid_arg,
@@ -66,265 +35,3 @@ __uml_setup("umid=", set_umid_arg,
" is used for naming the pid file and management console socket.\n\n"
);
-int __init umid_file_name(char *name, char *buf, int len)
-{
- int n;
-
- if(!umid_inited && make_umid(printk)) return(-1);
-
- n = strlen(uml_dir) + strlen(umid) + strlen(name) + 1;
- if(n > len){
- printk("umid_file_name : buffer too short\n");
- return(-1);
- }
-
- sprintf(buf, "%s%s/%s", uml_dir, umid, name);
- return(0);
-}
-
-extern int tracing_pid;
-
-static void __init create_pid_file(void)
-{
- char file[strlen(uml_dir) + UMID_LEN + sizeof("/pid\0")];
- char pid[sizeof("nnnnn\0")];
- int fd, n;
-
- if(umid_file_name("pid", file, sizeof(file)))
- return;
-
- fd = os_open_file(file, of_create(of_excl(of_rdwr(OPENFLAGS()))),
- 0644);
- if(fd < 0){
- printf("Open of machine pid file \"%s\" failed: %s\n",
- file, strerror(-fd));
- return;
- }
-
- sprintf(pid, "%d\n", os_getpid());
- n = os_write_file(fd, pid, strlen(pid));
- if(n != strlen(pid))
- printf("Write of pid file failed - err = %d\n", -n);
- os_close_file(fd);
-}
-
-static int actually_do_remove(char *dir)
-{
- DIR *directory;
- struct dirent *ent;
- int len;
- char file[256];
-
- directory = opendir(dir);
- if(directory == NULL){
- printk("actually_do_remove : couldn't open directory '%s', "
- "errno = %d\n", dir, errno);
- return(1);
- }
- while((ent = readdir(directory)) != NULL){
- if(!strcmp(ent->d_name, ".") || !strcmp(ent->d_name, ".."))
- continue;
- len = strlen(dir) + sizeof("/") + strlen(ent->d_name) + 1;
- if(len > sizeof(file)){
- printk("Not deleting '%s' from '%s' - name too long\n",
- ent->d_name, dir);
- continue;
- }
- sprintf(file, "%s/%s", dir, ent->d_name);
- if(unlink(file) < 0){
- printk("actually_do_remove : couldn't remove '%s' "
- "from '%s', errno = %d\n", ent->d_name, dir,
- errno);
- return(1);
- }
- }
- if(rmdir(dir) < 0){
- printk("actually_do_remove : couldn't rmdir '%s', "
- "errno = %d\n", dir, errno);
- return(1);
- }
- return(0);
-}
-
-void remove_umid_dir(void)
-{
- char dir[strlen(uml_dir) + UMID_LEN + 1];
- if (!umid_owned)
- return;
-
- sprintf(dir, "%s%s", uml_dir, umid);
- actually_do_remove(dir);
-}
-
-char *get_umid(int only_if_set)
-{
- if(only_if_set && umid_is_random)
- return NULL;
- return umid;
-}
-
-static int not_dead_yet(char *dir)
-{
- char file[strlen(uml_dir) + UMID_LEN + sizeof("/pid\0")];
- char pid[sizeof("nnnnn\0")], *end;
- int dead, fd, p, n;
-
- sprintf(file, "%s/pid", dir);
- dead = 0;
- fd = os_open_file(file, of_read(OPENFLAGS()), 0);
- if(fd < 0){
- if(fd != -ENOENT){
- printk("not_dead_yet : couldn't open pid file '%s', "
- "err = %d\n", file, -fd);
- return(1);
- }
- dead = 1;
- }
- if(fd > 0){
- n = os_read_file(fd, pid, sizeof(pid));
- if(n < 0){
- printk("not_dead_yet : couldn't read pid file '%s', "
- "err = %d\n", file, -n);
- return(1);
- }
- p = strtoul(pid, &end, 0);
- if(end == pid){
- printk("not_dead_yet : couldn't parse pid file '%s', "
- "errno = %d\n", file, errno);
- dead = 1;
- }
- if(((kill(p, 0) < 0) && (errno == ESRCH)) ||
- (p == CHOOSE_MODE(tracing_pid, os_getpid())))
- dead = 1;
- }
- if(!dead)
- return(1);
- return(actually_do_remove(dir));
-}
-
-static int __init set_uml_dir(char *name, int *add)
-{
- if((strlen(name) > 0) && (name[strlen(name) - 1] != '/')){
- uml_dir = malloc(strlen(name) + 2);
- if(uml_dir == NULL){
- printf("Failed to malloc uml_dir - error = %d\n",
- errno);
- uml_dir = name;
- /* Return 0 here because do_initcalls doesn't look at
- * the return value.
- */
- return(0);
- }
- sprintf(uml_dir, "%s/", name);
- }
- else uml_dir = name;
- return(0);
-}
-
-static int __init make_uml_dir(void)
-{
- char dir[MAXPATHLEN + 1] = { '\0' };
- int len;
-
- if(*uml_dir == '~'){
- char *home = getenv("HOME");
-
- if(home == NULL){
- printf("make_uml_dir : no value in environment for "
- "$HOME\n");
- exit(1);
- }
- strlcpy(dir, home, sizeof(dir));
- uml_dir++;
- }
- strlcat(dir, uml_dir, sizeof(dir));
- len = strlen(dir);
- if (len > 0 && dir[len - 1] != '/')
- strlcat(dir, "/", sizeof(dir));
-
- uml_dir = malloc(strlen(dir) + 1);
- if (uml_dir == NULL) {
- printf("make_uml_dir : malloc failed, errno = %d\n", errno);
- exit(1);
- }
- strcpy(uml_dir, dir);
-
- if((mkdir(uml_dir, 0777) < 0) && (errno != EEXIST)){
- printf("Failed to mkdir %s: %s\n", uml_dir, strerror(errno));
- return(-1);
- }
- return 0;
-}
-
-static int __init make_umid(int (*printer)(const char *fmt, ...))
-{
- int fd, err;
- char tmp[strlen(uml_dir) + UMID_LEN + 1];
-
- strlcpy(tmp, uml_dir, sizeof(tmp));
-
- if(!umid_inited){
- strcat(tmp, "XXXXXX");
- fd = mkstemp(tmp);
- if(fd < 0){
- (*printer)("make_umid - mkstemp(%s) failed: %s\n",
- tmp,strerror(errno));
- return(1);
- }
-
- os_close_file(fd);
- /* There's a nice tiny little race between this unlink and
- * the mkdir below. It'd be nice if there were a mkstemp
- * for directories.
- */
- unlink(tmp);
- set_umid(&tmp[strlen(uml_dir)], 1, printer);
- }
-
- sprintf(tmp, "%s%s", uml_dir, umid);
-
- err = mkdir(tmp, 0777);
- if(err < 0){
- if(errno == EEXIST){
- if(not_dead_yet(tmp)){
- (*printer)("umid '%s' is in use\n", umid);
- umid_owned = 0;
- return(-1);
- }
- err = mkdir(tmp, 0777);
- }
- }
- if(err < 0){
- (*printer)("Failed to create %s - errno = %d\n", umid, errno);
- return(-1);
- }
-
- umid_owned = 1;
- return 0;
-}
-
-__uml_setup("uml_dir=", set_uml_dir,
-"uml_dir=<directory>\n"
-" The location to place the pid and umid files.\n\n"
-);
-
-static int __init make_umid_setup(void)
-{
- /* one function with the ordering we need ... */
- make_uml_dir();
- make_umid(printf);
- create_pid_file();
- return 0;
-}
-__uml_postsetup(make_umid_setup);
-
-/*
- * Overrides for Emacs so that we follow Linus's tabbing style.
- * Emacs will notice this stuff at the end of the file and automatically
- * adjust the settings for this buffer only. This must remain at the end
- * of the file.
- * ---------------------------------------------------------------------------
- * Local variables:
- * c-file-style: "linux"
- * End:
- */
diff --git a/arch/um/os-Linux/Makefile b/arch/um/os-Linux/Makefile
index b83ac8e21c3..11e30b13e31 100644
--- a/arch/um/os-Linux/Makefile
+++ b/arch/um/os-Linux/Makefile
@@ -4,11 +4,11 @@
#
obj-y = aio.o elf_aux.o file.o helper.o main.o mem.o process.o signal.o \
- start_up.o time.o tt.o tty.o uaccess.o user_syms.o drivers/ \
+ start_up.o time.o tt.o tty.o uaccess.o umid.o user_syms.o drivers/ \
sys-$(SUBARCH)/
USER_OBJS := aio.o elf_aux.o file.o helper.o main.o mem.o process.o signal.o \
- start_up.o time.o tt.o tty.o uaccess.o
+ start_up.o time.o tt.o tty.o uaccess.o umid.o
elf_aux.o: $(ARCH_DIR)/kernel-offsets.h
CFLAGS_elf_aux.o += -I$(objtree)/arch/um
diff --git a/arch/um/os-Linux/aio.c b/arch/um/os-Linux/aio.c
index ffa759addd3..f897140cc4a 100644
--- a/arch/um/os-Linux/aio.c
+++ b/arch/um/os-Linux/aio.c
@@ -16,12 +16,12 @@
#include "mode.h"
struct aio_thread_req {
- enum aio_type type;
- int io_fd;
- unsigned long long offset;
- char *buf;
- int len;
- struct aio_context *aio;
+ enum aio_type type;
+ int io_fd;
+ unsigned long long offset;
+ char *buf;
+ int len;
+ struct aio_context *aio;
};
static int aio_req_fd_r = -1;
@@ -38,18 +38,18 @@ static int aio_req_fd_w = -1;
static long io_setup(int n, aio_context_t *ctxp)
{
- return syscall(__NR_io_setup, n, ctxp);
+ return syscall(__NR_io_setup, n, ctxp);
}
static long io_submit(aio_context_t ctx, long nr, struct iocb **iocbpp)
{
- return syscall(__NR_io_submit, ctx, nr, iocbpp);
+ return syscall(__NR_io_submit, ctx, nr, iocbpp);
}
static long io_getevents(aio_context_t ctx_id, long min_nr, long nr,
- struct io_event *events, struct timespec *timeout)
+ struct io_event *events, struct timespec *timeout)
{
- return syscall(__NR_io_getevents, ctx_id, min_nr, nr, events, timeout);
+ return syscall(__NR_io_getevents, ctx_id, min_nr, nr, events, timeout);
}
#endif
@@ -66,243 +66,245 @@ static long io_getevents(aio_context_t ctx_id, long min_nr, long nr,
*/
static int do_aio(aio_context_t ctx, enum aio_type type, int fd, char *buf,
- int len, unsigned long long offset, struct aio_context *aio)
+ int len, unsigned long long offset, struct aio_context *aio)
{
- struct iocb iocb, *iocbp = &iocb;
- char c;
- int err;
-
- iocb = ((struct iocb) { .aio_data = (unsigned long) aio,
- .aio_reqprio = 0,
- .aio_fildes = fd,
- .aio_buf = (unsigned long) buf,
- .aio_nbytes = len,
- .aio_offset = offset,
- .aio_reserved1 = 0,
- .aio_reserved2 = 0,
- .aio_reserved3 = 0 });
-
- switch(type){
- case AIO_READ:
- iocb.aio_lio_opcode = IOCB_CMD_PREAD;
- err = io_submit(ctx, 1, &iocbp);
- break;
- case AIO_WRITE:
- iocb.aio_lio_opcode = IOCB_CMD_PWRITE;
- err = io_submit(ctx, 1, &iocbp);
- break;
- case AIO_MMAP:
- iocb.aio_lio_opcode = IOCB_CMD_PREAD;
- iocb.aio_buf = (unsigned long) &c;
- iocb.aio_nbytes = sizeof(c);
- err = io_submit(ctx, 1, &iocbp);
- break;
- default:
- printk("Bogus op in do_aio - %d\n", type);
- err = -EINVAL;
- break;
- }
-
- if(err > 0)
- err = 0;
+ struct iocb iocb, *iocbp = &iocb;
+ char c;
+ int err;
+
+ iocb = ((struct iocb) { .aio_data = (unsigned long) aio,
+ .aio_reqprio = 0,
+ .aio_fildes = fd,
+ .aio_buf = (unsigned long) buf,
+ .aio_nbytes = len,
+ .aio_offset = offset,
+ .aio_reserved1 = 0,
+ .aio_reserved2 = 0,
+ .aio_reserved3 = 0 });
+
+ switch(type){
+ case AIO_READ:
+ iocb.aio_lio_opcode = IOCB_CMD_PREAD;
+ err = io_submit(ctx, 1, &iocbp);
+ break;
+ case AIO_WRITE:
+ iocb.aio_lio_opcode = IOCB_CMD_PWRITE;
+ err = io_submit(ctx, 1, &iocbp);
+ break;
+ case AIO_MMAP:
+ iocb.aio_lio_opcode = IOCB_CMD_PREAD;
+ iocb.aio_buf = (unsigned long) &c;
+ iocb.aio_nbytes = sizeof(c);
+ err = io_submit(ctx, 1, &iocbp);
+ break;
+ default:
+ printk("Bogus op in do_aio - %d\n", type);
+ err = -EINVAL;
+ break;
+ }
+
+ if(err > 0)
+ err = 0;
else
err = -errno;
- return err;
+ return err;
}
static aio_context_t ctx = 0;
static int aio_thread(void *arg)
{
- struct aio_thread_reply reply;
- struct io_event event;
- int err, n, reply_fd;
-
- signal(SIGWINCH, SIG_IGN);
-
- while(1){
- n = io_getevents(ctx, 1, 1, &event, NULL);
- if(n < 0){
- if(errno == EINTR)
- continue;
- printk("aio_thread - io_getevents failed, "
- "errno = %d\n", errno);
- }
- else {
- reply = ((struct aio_thread_reply)
- { .data = (void *) (long) event.data,
- .err = event.res });
+ struct aio_thread_reply reply;
+ struct io_event event;
+ int err, n, reply_fd;
+
+ signal(SIGWINCH, SIG_IGN);
+
+ while(1){
+ n = io_getevents(ctx, 1, 1, &event, NULL);
+ if(n < 0){
+ if(errno == EINTR)
+ continue;
+ printk("aio_thread - io_getevents failed, "
+ "errno = %d\n", errno);
+ }
+ else {
+ reply = ((struct aio_thread_reply)
+ { .data = (void *) (long) event.data,
+ .err = event.res });
reply_fd = ((struct aio_context *) reply.data)->reply_fd;
err = os_write_file(reply_fd, &reply, sizeof(reply));
- if(err != sizeof(reply))
+ if(err != sizeof(reply))
printk("aio_thread - write failed, fd = %d, "
- "err = %d\n", aio_req_fd_r, -err);
- }
- }
- return 0;
+ "err = %d\n", aio_req_fd_r, -err);
+ }
+ }
+ return 0;
}
#endif
static int do_not_aio(struct aio_thread_req *req)
{
- char c;
- int err;
-
- switch(req->type){
- case AIO_READ:
- err = os_seek_file(req->io_fd, req->offset);
- if(err)
- goto out;
-
- err = os_read_file(req->io_fd, req->buf, req->len);
- break;
- case AIO_WRITE:
- err = os_seek_file(req->io_fd, req->offset);
- if(err)
- goto out;
-
- err = os_write_file(req->io_fd, req->buf, req->len);
- break;
- case AIO_MMAP:
- err = os_seek_file(req->io_fd, req->offset);
- if(err)
- goto out;
-
- err = os_read_file(req->io_fd, &c, sizeof(c));
- break;
- default:
- printk("do_not_aio - bad request type : %d\n", req->type);
- err = -EINVAL;
- break;
- }
-
- out:
- return err;
+ char c;
+ int err;
+
+ switch(req->type){
+ case AIO_READ:
+ err = os_seek_file(req->io_fd, req->offset);
+ if(err)
+ goto out;
+
+ err = os_read_file(req->io_fd, req->buf, req->len);
+ break;
+ case AIO_WRITE:
+ err = os_seek_file(req->io_fd, req->offset);
+ if(err)
+ goto out;
+
+ err = os_write_file(req->io_fd, req->buf, req->len);
+ break;
+ case AIO_MMAP:
+ err = os_seek_file(req->io_fd, req->offset);
+ if(err)
+ goto out;
+
+ err = os_read_file(req->io_fd, &c, sizeof(c));
+ break;
+ default:
+ printk("do_not_aio - bad request type : %d\n", req->type);
+ err = -EINVAL;
+ break;
+ }
+
+out:
+ return err;
}
static int not_aio_thread(void *arg)
{
- struct aio_thread_req req;
- struct aio_thread_reply reply;
- int err;
-
- signal(SIGWINCH, SIG_IGN);
- while(1){
- err = os_read_file(aio_req_fd_r, &req, sizeof(req));
- if(err != sizeof(req)){
- if(err < 0)
- printk("not_aio_thread - read failed, "
- "fd = %d, err = %d\n", aio_req_fd_r,
- -err);
- else {
- printk("not_aio_thread - short read, fd = %d, "
- "length = %d\n", aio_req_fd_r, err);
- }
- continue;
- }
- err = do_not_aio(&req);
- reply = ((struct aio_thread_reply) { .data = req.aio,
- .err = err });
- err = os_write_file(req.aio->reply_fd, &reply, sizeof(reply));
- if(err != sizeof(reply))
- printk("not_aio_thread - write failed, fd = %d, "
- "err = %d\n", aio_req_fd_r, -err);
- }
+ struct aio_thread_req req;
+ struct aio_thread_reply reply;
+ int err;
+
+ signal(SIGWINCH, SIG_IGN);
+ while(1){
+ err = os_read_file(aio_req_fd_r, &req, sizeof(req));
+ if(err != sizeof(req)){
+ if(err < 0)
+ printk("not_aio_thread - read failed, "
+ "fd = %d, err = %d\n", aio_req_fd_r,
+ -err);
+ else {
+ printk("not_aio_thread - short read, fd = %d, "
+ "length = %d\n", aio_req_fd_r, err);
+ }
+ continue;
+ }
+ err = do_not_aio(&req);
+ reply = ((struct aio_thread_reply) { .data = req.aio,
+ .err = err });
+ err = os_write_file(req.aio->reply_fd, &reply, sizeof(reply));
+ if(err != sizeof(reply))
+ printk("not_aio_thread - write failed, fd = %d, "
+ "err = %d\n", aio_req_fd_r, -err);
+ }
+
+ return 0;
}
static int aio_pid = -1;
static int init_aio_24(void)
{
- unsigned long stack;
- int fds[2], err;
-
- err = os_pipe(fds, 1, 1);
- if(err)
- goto out;
-
- aio_req_fd_w = fds[0];
- aio_req_fd_r = fds[1];
- err = run_helper_thread(not_aio_thread, NULL,
- CLONE_FILES | CLONE_VM | SIGCHLD, &stack, 0);
- if(err < 0)
- goto out_close_pipe;
-
- aio_pid = err;
- goto out;
-
- out_close_pipe:
- os_close_file(fds[0]);
- os_close_file(fds[1]);
- aio_req_fd_w = -1;
- aio_req_fd_r = -1;
- out:
+ unsigned long stack;
+ int fds[2], err;
+
+ err = os_pipe(fds, 1, 1);
+ if(err)
+ goto out;
+
+ aio_req_fd_w = fds[0];
+ aio_req_fd_r = fds[1];
+ err = run_helper_thread(not_aio_thread, NULL,
+ CLONE_FILES | CLONE_VM | SIGCHLD, &stack, 0);
+ if(err < 0)
+ goto out_close_pipe;
+
+ aio_pid = err;
+ goto out;
+
+out_close_pipe:
+ os_close_file(fds[0]);
+ os_close_file(fds[1]);
+ aio_req_fd_w = -1;
+ aio_req_fd_r = -1;
+out:
#ifndef HAVE_AIO_ABI
printk("/usr/include/linux/aio_abi.h not present during build\n");
#endif
printk("2.6 host AIO support not used - falling back to I/O "
"thread\n");
- return 0;
+ return 0;
}
#ifdef HAVE_AIO_ABI
#define DEFAULT_24_AIO 0
static int init_aio_26(void)
{
- unsigned long stack;
- int err;
+ unsigned long stack;
+ int err;
- if(io_setup(256, &ctx)){
+ if(io_setup(256, &ctx)){
err = -errno;
- printk("aio_thread failed to initialize context, err = %d\n",
- errno);
- return err;
- }
+ printk("aio_thread failed to initialize context, err = %d\n",
+ errno);
+ return err;
+ }
- err = run_helper_thread(aio_thread, NULL,
- CLONE_FILES | CLONE_VM | SIGCHLD, &stack, 0);
- if(err < 0)
- return err;
+ err = run_helper_thread(aio_thread, NULL,
+ CLONE_FILES | CLONE_VM | SIGCHLD, &stack, 0);
+ if(err < 0)
+ return err;
- aio_pid = err;
+ aio_pid = err;
printk("Using 2.6 host AIO\n");
- return 0;
+ return 0;
}
static int submit_aio_26(enum aio_type type, int io_fd, char *buf, int len,
unsigned long long offset, struct aio_context *aio)
{
- struct aio_thread_reply reply;
- int err;
-
- err = do_aio(ctx, type, io_fd, buf, len, offset, aio);
- if(err){
- reply = ((struct aio_thread_reply) { .data = aio,
- .err = err });
- err = os_write_file(aio->reply_fd, &reply, sizeof(reply));
- if(err != sizeof(reply))
- printk("submit_aio_26 - write failed, "
- "fd = %d, err = %d\n", aio->reply_fd, -err);
- else err = 0;
- }
-
- return err;
+ struct aio_thread_reply reply;
+ int err;
+
+ err = do_aio(ctx, type, io_fd, buf, len, offset, aio);
+ if(err){
+ reply = ((struct aio_thread_reply) { .data = aio,
+ .err = err });
+ err = os_write_file(aio->reply_fd, &reply, sizeof(reply));
+ if(err != sizeof(reply))
+ printk("submit_aio_26 - write failed, "
+ "fd = %d, err = %d\n", aio->reply_fd, -err);
+ else err = 0;
+ }
+
+ return err;
}
#else
#define DEFAULT_24_AIO 1
static int init_aio_26(void)
{
- return -ENOSYS;
+ return -ENOSYS;
}
static int submit_aio_26(enum aio_type type, int io_fd, char *buf, int len,
unsigned long long offset, struct aio_context *aio)
{
- return -ENOSYS;
+ return -ENOSYS;
}
#endif
@@ -310,8 +312,8 @@ static int aio_24 = DEFAULT_24_AIO;
static int __init set_aio_24(char *name, int *add)
{
- aio_24 = 1;
- return 0;
+ aio_24 = 1;
+ return 0;
}
__uml_setup("aio=2.4", set_aio_24,
@@ -328,28 +330,27 @@ __uml_setup("aio=2.4", set_aio_24,
static int init_aio(void)
{
- int err;
-
- CHOOSE_MODE(({
- if(!aio_24){
- printk("Disabling 2.6 AIO in tt mode\n");
- aio_24 = 1;
- } }), (void) 0);
-
- if(!aio_24){
- err = init_aio_26();
- if(err && (errno == ENOSYS)){
- printk("2.6 AIO not supported on the host - "
- "reverting to 2.4 AIO\n");
- aio_24 = 1;
- }
- else return err;
- }
-
- if(aio_24)
- return init_aio_24();
-
- return 0;
+ int err;
+
+ CHOOSE_MODE(({ if(!aio_24){
+ printk("Disabling 2.6 AIO in tt mode\n");
+ aio_24 = 1;
+ } }), (void) 0);
+
+ if(!aio_24){
+ err = init_aio_26();
+ if(err && (errno == ENOSYS)){
+ printk("2.6 AIO not supported on the host - "
+ "reverting to 2.4 AIO\n");
+ aio_24 = 1;
+ }
+ else return err;
+ }
+
+ if(aio_24)
+ return init_aio_24();
+
+ return 0;
}
/* The reason for the __initcall/__uml_exitcall asymmetry is that init_aio
@@ -362,8 +363,8 @@ __initcall(init_aio);
static void exit_aio(void)
{
- if(aio_pid != -1)
- os_kill_process(aio_pid, 1);
+ if(aio_pid != -1)
+ os_kill_process(aio_pid, 1);
}
__uml_exitcall(exit_aio);
@@ -371,30 +372,30 @@ __uml_exitcall(exit_aio);
static int submit_aio_24(enum aio_type type, int io_fd, char *buf, int len,
unsigned long long offset, struct aio_context *aio)
{
- struct aio_thread_req req = { .type = type,
- .io_fd = io_fd,
- .offset = offset,
- .buf = buf,
- .len = len,
- .aio = aio,
- };
- int err;
-
- err = os_write_file(aio_req_fd_w, &req, sizeof(req));
- if(err == sizeof(req))
- err = 0;
-
- return err;
+ struct aio_thread_req req = { .type = type,
+ .io_fd = io_fd,
+ .offset = offset,
+ .buf = buf,
+ .len = len,
+ .aio = aio,
+ };
+ int err;
+
+ err = os_write_file(aio_req_fd_w, &req, sizeof(req));
+ if(err == sizeof(req))
+ err = 0;
+
+ return err;
}
int submit_aio(enum aio_type type, int io_fd, char *buf, int len,
- unsigned long long offset, int reply_fd,
- struct aio_context *aio)
+ unsigned long long offset, int reply_fd,
+ struct aio_context *aio)
{
- aio->reply_fd = reply_fd;
- if(aio_24)
- return submit_aio_24(type, io_fd, buf, len, offset, aio);
- else {
- return submit_aio_26(type, io_fd, buf, len, offset, aio);
- }
+ aio->reply_fd = reply_fd;
+ if(aio_24)
+ return submit_aio_24(type, io_fd, buf, len, offset, aio);
+ else {
+ return submit_aio_26(type, io_fd, buf, len, offset, aio);
+ }
}
diff --git a/arch/um/os-Linux/umid.c b/arch/um/os-Linux/umid.c
new file mode 100644
index 00000000000..ecf107ae5ac
--- /dev/null
+++ b/arch/um/os-Linux/umid.c
@@ -0,0 +1,335 @@
+#include <stdio.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#include <signal.h>
+#include <dirent.h>
+#include <sys/fcntl.h>
+#include <sys/stat.h>
+#include <sys/param.h>
+#include "init.h"
+#include "os.h"
+#include "user.h"
+#include "mode.h"
+
+#define UML_DIR "~/.uml/"
+
+#define UMID_LEN 64
+
+/* Changed by set_umid, which is run early in boot */
+char umid[UMID_LEN] = { 0 };
+
+/* Changed by set_uml_dir and make_uml_dir, which are run early in boot */
+static char *uml_dir = UML_DIR;
+
+static int __init make_uml_dir(void)
+{
+ char dir[512] = { '\0' };
+ int len, err;
+
+ if(*uml_dir == '~'){
+ char *home = getenv("HOME");
+
+ err = -ENOENT;
+ if(home == NULL){
+ printk("make_uml_dir : no value in environment for "
+ "$HOME\n");
+ goto err;
+ }
+ strlcpy(dir, home, sizeof(dir));
+ uml_dir++;
+ }
+ strlcat(dir, uml_dir, sizeof(dir));
+ len = strlen(dir);
+ if (len > 0 && dir[len - 1] != '/')
+ strlcat(dir, "/", sizeof(dir));
+
+ err = -ENOMEM;
+ uml_dir = malloc(strlen(dir) + 1);
+ if (uml_dir == NULL) {
+ printf("make_uml_dir : malloc failed, errno = %d\n", errno);
+ goto err;
+ }
+ strcpy(uml_dir, dir);
+
+ if((mkdir(uml_dir, 0777) < 0) && (errno != EEXIST)){
+ printf("Failed to mkdir '%s': %s\n", uml_dir, strerror(errno));
+ err = -errno;
+ goto err_free;
+ }
+ return 0;
+
+err_free:
+ free(uml_dir);
+err:
+ uml_dir = NULL;
+ return err;
+}
+
+static int actually_do_remove(char *dir)
+{
+ DIR *directory;
+ struct dirent *ent;
+ int len;
+ char file[256];
+
+ directory = opendir(dir);
+ if(directory == NULL)
+ return -errno;
+
+ while((ent = readdir(directory)) != NULL){
+ if(!strcmp(ent->d_name, ".") || !strcmp(ent->d_name, ".."))
+ continue;
+ len = strlen(dir) + sizeof("/") + strlen(ent->d_name) + 1;
+ if(len > sizeof(file))
+ return -E2BIG;
+
+ sprintf(file, "%s/%s", dir, ent->d_name);
+ if(unlink(file) < 0)
+ return -errno;
+ }
+ if(rmdir(dir) < 0)
+ return -errno;
+
+ return 0;
+}
+
+/* This says that there isn't already a user of the specified directory even if
+ * there are errors during the checking. This is because if these errors
+ * happen, the directory is unusable by the pre-existing UML, so we might as
+ * well take it over. This could happen either by
+ * the existing UML somehow corrupting its umid directory
+ * something other than UML sticking stuff in the directory
+ * this boot racing with a shutdown of the other UML
+ * In any of these cases, the directory isn't useful for anything else.
+ */
+
+static int not_dead_yet(char *dir)
+{
+ char file[strlen(uml_dir) + UMID_LEN + sizeof("/pid\0")];
+ char pid[sizeof("nnnnn\0")], *end;
+ int dead, fd, p, n, err;
+
+ n = snprintf(file, sizeof(file), "%s/pid", dir);
+ if(n >= sizeof(file)){
+ printk("not_dead_yet - pid filename too long\n");
+ err = -E2BIG;
+ goto out;
+ }
+
+ dead = 0;
+ fd = open(file, O_RDONLY);
+ if(fd < 0){
+ if(fd != -ENOENT){
+ printk("not_dead_yet : couldn't open pid file '%s', "
+ "err = %d\n", file, -fd);
+ }
+ goto out;
+ }
+
+ err = 0;
+ n = read(fd, pid, sizeof(pid));
+ if(n <= 0){
+ printk("not_dead_yet : couldn't read pid file '%s', "
+ "err = %d\n", file, -n);
+ goto out_close;
+ }
+
+ p = strtoul(pid, &end, 0);
+ if(end == pid){
+ printk("not_dead_yet : couldn't parse pid file '%s', "
+ "errno = %d\n", file, errno);
+ goto out_close;
+ }
+
+ if((kill(p, 0) == 0) || (errno != ESRCH))
+ return 1;
+
+ err = actually_do_remove(dir);
+ if(err)
+ printk("not_dead_yet - actually_do_remove failed with "
+ "err = %d\n", err);
+
+ return err;
+
+ out_close:
+ close(fd);
+ out:
+ return 0;
+}
+
+static void __init create_pid_file(void)
+{
+ char file[strlen(uml_dir) + UMID_LEN + sizeof("/pid\0")];
+ char pid[sizeof("nnnnn\0")];
+ int fd, n;
+
+ if(umid_file_name("pid", file, sizeof(file)))
+ return;
+
+ fd = open(file, O_RDWR | O_CREAT | O_EXCL, 0644);
+ if(fd < 0){
+ printk("Open of machine pid file \"%s\" failed: %s\n",
+ file, strerror(-fd));
+ return;
+ }
+
+ snprintf(pid, sizeof(pid), "%d\n", getpid());
+ n = write(fd, pid, strlen(pid));
+ if(n != strlen(pid))
+ printk("Write of pid file failed - err = %d\n", -n);
+
+ close(fd);
+}
+
+int __init set_umid(char *name)
+{
+ if(strlen(name) > UMID_LEN - 1)
+ return -E2BIG;
+
+ strlcpy(umid, name, sizeof(umid));
+
+ return 0;
+}
+
+static int umid_setup = 0;
+
+int __init make_umid(void)
+{
+ int fd, err;
+ char tmp[256];
+
+ if(umid_setup)
+ return 0;
+
+ make_uml_dir();
+
+ if(*umid == '\0'){
+ strlcpy(tmp, uml_dir, sizeof(tmp));
+ strlcat(tmp, "XXXXXX", sizeof(tmp));
+ fd = mkstemp(tmp);
+ if(fd < 0){
+ printk("make_umid - mkstemp(%s) failed: %s\n",
+ tmp, strerror(errno));
+ err = -errno;
+ goto err;
+ }
+
+ close(fd);
+
+ set_umid(&tmp[strlen(uml_dir)]);
+
+ /* There's a nice tiny little race between this unlink and
+ * the mkdir below. It'd be nice if there were a mkstemp
+ * for directories.
+ */
+ if(unlink(tmp)){
+ err = -errno;
+ goto err;
+ }
+ }
+
+ snprintf(tmp, sizeof(tmp), "%s%s", uml_dir, umid);
+ err = mkdir(tmp, 0777);
+ if(err < 0){
+ err = -errno;
+ if(errno != EEXIST)
+ goto err;
+
+ if(not_dead_yet(tmp) < 0)
+ goto err;
+
+ err = mkdir(tmp, 0777);
+ }
+ if(err < 0){
+ printk("Failed to create '%s' - err = %d\n", umid, err);
+ goto err_rmdir;
+ }
+
+ umid_setup = 1;
+
+ create_pid_file();
+
+ return 0;
+
+ err_rmdir:
+ rmdir(tmp);
+ err:
+ return err;
+}
+
+static int __init make_umid_init(void)
+{
+ make_umid();
+
+ return 0;
+}
+
+__initcall(make_umid_init);
+
+int __init umid_file_name(char *name, char *buf, int len)
+{
+ int n, err;
+
+ err = make_umid();
+ if(err)
+ return err;
+
+ n = snprintf(buf, len, "%s%s/%s", uml_dir, umid, name);
+ if(n >= len){
+ printk("umid_file_name : buffer too short\n");
+ return -E2BIG;
+ }
+
+ return 0;
+}
+
+char *get_umid(void)
+{
+ return umid;
+}
+
+static int __init set_uml_dir(char *name, int *add)
+{
+ if(*name == '\0'){
+ printf("uml_dir can't be an empty string\n");
+ return 0;
+ }
+
+ if(name[strlen(name) - 1] == '/'){
+ uml_dir = name;
+ return 0;
+ }
+
+ uml_dir = malloc(strlen(name) + 2);
+ if(uml_dir == NULL){
+ printf("Failed to malloc uml_dir - error = %d\n", errno);
+
+ /* Return 0 here because do_initcalls doesn't look at
+ * the return value.
+ */
+ return 0;
+ }
+ sprintf(uml_dir, "%s/", name);
+
+ return 0;
+}
+
+__uml_setup("uml_dir=", set_uml_dir,
+"uml_dir=<directory>\n"
+" The location to place the pid and umid files.\n\n"
+);
+
+static void remove_umid_dir(void)
+{
+ char dir[strlen(uml_dir) + UMID_LEN + 1], err;
+
+ sprintf(dir, "%s%s", uml_dir, umid);
+ err = actually_do_remove(dir);
+ if(err)
+ printf("remove_umid_dir - actually_do_remove failed with "
+ "err = %d\n", err);
+}
+
+__uml_exitcall(remove_umid_dir);
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-03 03:33:38 +0000