diff options
Diffstat (limited to 'arch/um/drivers')
49 files changed, 10430 insertions, 0 deletions
diff --git a/arch/um/drivers/Makefile b/arch/um/drivers/Makefile new file mode 100644 index 00000000000..323f72c64cd --- /dev/null +++ b/arch/um/drivers/Makefile @@ -0,0 +1,46 @@ +# +# Copyright (C) 2000, 2002, 2003 Jeff Dike (jdike@karaya.com) +# Licensed under the GPL +# + +# pcap is broken in 2.5 because kbuild doesn't allow pcap.a to be linked +# in to pcap.o + +slip-objs := slip_kern.o slip_user.o +slirp-objs := slirp_kern.o slirp_user.o +daemon-objs := daemon_kern.o daemon_user.o +mcast-objs := mcast_kern.o mcast_user.o +#pcap-objs := pcap_kern.o pcap_user.o $(PCAP) +net-objs := net_kern.o net_user.o +mconsole-objs := mconsole_kern.o mconsole_user.o +hostaudio-objs := hostaudio_kern.o +ubd-objs := ubd_kern.o ubd_user.o +port-objs := port_kern.o port_user.o +harddog-objs := harddog_kern.o harddog_user.o + +obj-y := stdio_console.o fd.o chan_kern.o chan_user.o line.o +obj-$(CONFIG_SSL) += ssl.o +obj-$(CONFIG_STDERR_CONSOLE) += stderr_console.o + +obj-$(CONFIG_UML_NET_SLIP) += slip.o +obj-$(CONFIG_UML_NET_SLIRP) += slirp.o +obj-$(CONFIG_UML_NET_DAEMON) += daemon.o +obj-$(CONFIG_UML_NET_MCAST) += mcast.o +#obj-$(CONFIG_UML_NET_PCAP) += pcap.o $(PCAP) +obj-$(CONFIG_UML_NET) += net.o +obj-$(CONFIG_MCONSOLE) += mconsole.o +obj-$(CONFIG_MMAPPER) += mmapper_kern.o +obj-$(CONFIG_BLK_DEV_UBD) += ubd.o +obj-$(CONFIG_HOSTAUDIO) += hostaudio.o +obj-$(CONFIG_NULL_CHAN) += null.o +obj-$(CONFIG_PORT_CHAN) += port.o +obj-$(CONFIG_PTY_CHAN) += pty.o +obj-$(CONFIG_TTY_CHAN) += tty.o +obj-$(CONFIG_XTERM_CHAN) += xterm.o xterm_kern.o +obj-$(CONFIG_UML_WATCHDOG) += harddog.o +obj-$(CONFIG_BLK_DEV_COW_COMMON) += cow_user.o +obj-$(CONFIG_UML_RANDOM) += random.o + +USER_OBJS := fd.o null.o pty.o tty.o xterm.o + +include arch/um/scripts/Makefile.rules diff --git a/arch/um/drivers/chan_kern.c b/arch/um/drivers/chan_kern.c new file mode 100644 index 00000000000..1f77deb3fd2 --- /dev/null +++ b/arch/um/drivers/chan_kern.c @@ -0,0 +1,577 @@ +/* + * Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com) + * Licensed under the GPL + */ + +#include <linux/stddef.h> +#include <linux/kernel.h> +#include <linux/list.h> +#include <linux/slab.h> +#include <linux/tty.h> +#include <linux/string.h> +#include <linux/tty_flip.h> +#include <asm/irq.h> +#include "chan_kern.h" +#include "user_util.h" +#include "kern.h" +#include "irq_user.h" +#include "sigio.h" +#include "line.h" +#include "os.h" + +#ifdef CONFIG_NOCONFIG_CHAN +static void *not_configged_init(char *str, int device, struct chan_opts *opts) +{ + printk(KERN_ERR "Using a channel type which is configured out of " + "UML\n"); + return(NULL); +} + +static int not_configged_open(int input, int output, int primary, void *data, + char **dev_out) +{ + printk(KERN_ERR "Using a channel type which is configured out of " + "UML\n"); + return(-ENODEV); +} + +static void not_configged_close(int fd, void *data) +{ + printk(KERN_ERR "Using a channel type which is configured out of " + "UML\n"); +} + +static int not_configged_read(int fd, char *c_out, void *data) +{ + printk(KERN_ERR "Using a channel type which is configured out of " + "UML\n"); + return(-EIO); +} + +static int not_configged_write(int fd, const char *buf, int len, void *data) +{ + printk(KERN_ERR "Using a channel type which is configured out of " + "UML\n"); + return(-EIO); +} + +static int not_configged_console_write(int fd, const char *buf, int len, + void *data) +{ + printk(KERN_ERR "Using a channel type which is configured out of " + "UML\n"); + return(-EIO); +} + +static int not_configged_window_size(int fd, void *data, unsigned short *rows, + unsigned short *cols) +{ + printk(KERN_ERR "Using a channel type which is configured out of " + "UML\n"); + return(-ENODEV); +} + +static void not_configged_free(void *data) +{ + printk(KERN_ERR "Using a channel type which is configured out of " + "UML\n"); +} + +static struct chan_ops not_configged_ops = { + .init = not_configged_init, + .open = not_configged_open, + .close = not_configged_close, + .read = not_configged_read, + .write = not_configged_write, + .console_write = not_configged_console_write, + .window_size = not_configged_window_size, + .free = not_configged_free, + .winch = 0, +}; +#endif /* CONFIG_NOCONFIG_CHAN */ + +void generic_close(int fd, void *unused) +{ + os_close_file(fd); +} + +int generic_read(int fd, char *c_out, void *unused) +{ + int n; + + n = os_read_file(fd, c_out, sizeof(*c_out)); + + if(n == -EAGAIN) + return(0); + else if(n == 0) + 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)); +} + +int generic_window_size(int fd, void *unused, unsigned short *rows_out, + unsigned short *cols_out) +{ + int rows, cols; + int ret; + + ret = os_window_size(fd, &rows, &cols); + if(ret < 0) + return(ret); + + ret = ((*rows_out != rows) || (*cols_out != cols)); + + *rows_out = rows; + *cols_out = cols; + + return(ret); +} + +void generic_free(void *data) +{ + kfree(data); +} + +static void tty_receive_char(struct tty_struct *tty, char ch) +{ + if(tty == NULL) return; + + if(I_IXON(tty) && !I_IXOFF(tty) && !tty->raw) { + if(ch == STOP_CHAR(tty)){ + stop_tty(tty); + return; + } + else if(ch == START_CHAR(tty)){ + start_tty(tty); + return; + } + } + + 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) +{ + 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); + chan->fd = fd; + + chan->opened = 1; + return(0); +} + +int open_chan(struct list_head *chans) +{ + struct list_head *ele; + struct chan *chan; + int ret, err = 0; + + 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; + } + return(err); +} + +void chan_enable_winch(struct list_head *chans, struct tty_struct *tty) +{ + struct list_head *ele; + struct chan *chan; + + list_for_each(ele, chans){ + chan = list_entry(ele, struct chan, list); + if(chan->primary && chan->output && chan->ops->winch){ + register_winch(chan->fd, tty); + return; + } + } +} + +void enable_chan(struct list_head *chans, struct tty_struct *tty) +{ + struct list_head *ele; + struct chan *chan; + + list_for_each(ele, chans){ + chan = list_entry(ele, struct chan, list); + if(!chan->opened) continue; + + line_setup_irq(chan->fd, chan->input, chan->output, tty); + } +} + +void close_chan(struct list_head *chans) +{ + struct chan *chan; + + /* Close in reverse order as open in case more than one of them + * refers to the same device and they save and restore that device's + * state. Then, the first one opened will have the original state, + * 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; + } +} + +int write_chan(struct list_head *chans, const char *buf, int len, + int write_irq) +{ + struct list_head *ele; + struct chan *chan = NULL; + int n, ret = 0; + + list_for_each(ele, chans) { + chan = list_entry(ele, struct chan, list); + if (!chan->output || (chan->ops->write == NULL)) + continue; + n = chan->ops->write(chan->fd, buf, len, chan->data); + if (chan->primary) { + ret = n; + if ((ret == -EAGAIN) || ((ret >= 0) && (ret < len))) + reactivate_fd(chan->fd, write_irq); + } + } + return(ret); +} + +int console_write_chan(struct list_head *chans, const char *buf, int len) +{ + struct list_head *ele; + struct chan *chan; + int n, ret = 0; + + list_for_each(ele, chans){ + chan = list_entry(ele, struct chan, list); + if(!chan->output || (chan->ops->console_write == NULL)) + continue; + n = chan->ops->console_write(chan->fd, buf, len, chan->data); + if(chan->primary) ret = n; + } + return(ret); +} + +int console_open_chan(struct line *line, struct console *co, struct chan_opts *opts) +{ + if (!list_empty(&line->chan_list)) + return 0; + + 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; +} + +int chan_window_size(struct list_head *chans, unsigned short *rows_out, + unsigned short *cols_out) +{ + struct list_head *ele; + struct chan *chan; + + 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)); + } + } + return(0); +} + +void free_one_chan(struct chan *chan) +{ + list_del(&chan->list); + 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) +{ + 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); + } +} + +static int one_chan_config_string(struct chan *chan, char *str, int size, + char **error_out) +{ + int n = 0; + + if(chan == NULL){ + CONFIG_CHUNK(str, size, n, "none", 1); + return(n); + } + + CONFIG_CHUNK(str, size, n, chan->ops->type, 0); + + if(chan->dev == NULL){ + CONFIG_CHUNK(str, size, n, "", 1); + return(n); + } + + CONFIG_CHUNK(str, size, n, ":", 0); + CONFIG_CHUNK(str, size, n, chan->dev, 0); + + return(n); +} + +static int chan_pair_config_string(struct chan *in, struct chan *out, + char *str, int size, char **error_out) +{ + int n; + + n = one_chan_config_string(in, str, size, error_out); + str += n; + size -= n; + + if(in == out){ + CONFIG_CHUNK(str, size, n, "", 1); + return(n); + } + + CONFIG_CHUNK(str, size, n, ",", 1); + n = one_chan_config_string(out, str, size, error_out); + str += n; + size -= n; + CONFIG_CHUNK(str, size, n, "", 1); + + return(n); +} + +int chan_config_string(struct list_head *chans, char *str, int size, + char **error_out) +{ + struct list_head *ele; + struct chan *chan, *in = NULL, *out = NULL; + + list_for_each(ele, chans){ + chan = list_entry(ele, struct chan, list); + if(!chan->primary) + continue; + if(chan->input) + in = chan; + if(chan->output) + out = chan; + } + + return(chan_pair_config_string(in, out, str, size, error_out)); +} + +struct chan_type { + char *key; + struct chan_ops *ops; +}; + +struct chan_type chan_table[] = { + { "fd", &fd_ops }, + +#ifdef CONFIG_NULL_CHAN + { "null", &null_ops }, +#else + { "null", ¬_configged_ops }, +#endif + +#ifdef CONFIG_PORT_CHAN + { "port", &port_ops }, +#else + { "port", ¬_configged_ops }, +#endif + +#ifdef CONFIG_PTY_CHAN + { "pty", &pty_ops }, + { "pts", &pts_ops }, +#else + { "pty", ¬_configged_ops }, + { "pts", ¬_configged_ops }, +#endif + +#ifdef CONFIG_TTY_CHAN + { "tty", &tty_ops }, +#else + { "tty", ¬_configged_ops }, +#endif + +#ifdef CONFIG_XTERM_CHAN + { "xterm", &xterm_ops }, +#else + { "xterm", ¬_configged_ops }, +#endif +}; + +static struct chan *parse_chan(char *str, int pri, int device, + struct chan_opts *opts) +{ + struct chan_type *entry; + struct chan_ops *ops; + struct chan *chan; + void *data; + int i; + + ops = NULL; + data = NULL; + for(i = 0; i < sizeof(chan_table)/sizeof(chan_table[0]); i++){ + entry = &chan_table[i]; + if(!strncmp(str, entry->key, strlen(entry->key))){ + ops = entry->ops; + str += strlen(entry->key); + break; + } + } + if(ops == NULL){ + printk(KERN_ERR "parse_chan couldn't parse \"%s\"\n", + str); + return(NULL); + } + if(ops->init == NULL) return(NULL); + data = (*ops->init)(str, device, opts); + if(data == NULL) return(NULL); + + chan = kmalloc(sizeof(*chan), GFP_KERNEL); + if(chan == NULL) return(NULL); + *chan = ((struct chan) { .list = LIST_HEAD_INIT(chan->list), + .primary = 1, + .input = 0, + .output = 0, + .opened = 0, + .fd = -1, + .pri = pri, + .ops = ops, + .data = data }); + return(chan); +} + +int parse_chan_pair(char *str, struct list_head *chans, int pri, int device, + struct chan_opts *opts) +{ + 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); + INIT_LIST_HEAD(chans); + } + + out = strchr(str, ','); + if(out != NULL){ + in = str; + *out = '\0'; + out++; + new = parse_chan(in, pri, 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); + list_add(&new->list, chans); + new->output = 1; + } + else { + new = parse_chan(str, pri, device, opts); + if(new == NULL) return(-1); + list_add(&new->list, chans); + new->input = 1; + new->output = 1; + } + return(0); +} + +int chan_out_fd(struct list_head *chans) +{ + struct list_head *ele; + struct chan *chan; + + list_for_each(ele, chans){ + chan = list_entry(ele, struct chan, list); + if(chan->primary && chan->output) + return(chan->fd); + } + return(-1); +} + +void chan_interrupt(struct list_head *chans, struct work_struct *task, + struct tty_struct *tty, int irq) +{ + struct list_head *ele, *next; + struct chan *chan; + int err; + char c; + + list_for_each_safe(ele, next, chans){ + chan = list_entry(ele, struct chan, list); + if(!chan->input || (chan->ops->read == NULL)) continue; + do { + if((tty != NULL) && + (tty->flip.count >= TTY_FLIPBUF_SIZE)){ + schedule_work(task); + goto out; + } + err = chan->ops->read(chan->fd, &c, chan->data); + if(err > 0) + tty_receive_char(tty, c); + } while(err > 0); + + if(err == 0) reactivate_fd(chan->fd, irq); + if(err == -EIO){ + if(chan->primary){ + if(tty != NULL) + tty_hangup(tty); + line_disable(tty, irq); + close_chan(chans); + free_chan(chans); + return; + } + else { + if(chan->ops->close != NULL) + chan->ops->close(chan->fd, chan->data); + free_one_chan(chan); + } + } + } + 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/chan_user.c b/arch/um/drivers/chan_user.c new file mode 100644 index 00000000000..583b8e137c3 --- /dev/null +++ b/arch/um/drivers/chan_user.c @@ -0,0 +1,210 @@ +/* + * Copyright (C) 2000 - 2003 Jeff Dike (jdike@addtoit.com) + * Licensed under the GPL + */ + +#include <unistd.h> +#include <stdlib.h> +#include <errno.h> +#include <termios.h> +#include <string.h> +#include <signal.h> +#include <sys/stat.h> +#include <sys/ioctl.h> +#include <sys/socket.h> +#include "kern_util.h" +#include "user_util.h" +#include "chan_user.h" +#include "user.h" +#include "helper.h" +#include "os.h" +#include "choose-mode.h" +#include "mode.h" + +int generic_console_write(int fd, const char *buf, int n, void *unused) +{ + struct termios save, new; + int err; + + if(isatty(fd)){ + CATCH_EINTR(err = tcgetattr(fd, &save)); + if (err) + goto error; + new = save; + /* The terminal becomes a bit less raw, to handle \n also as + * "Carriage Return", not only as "New Line". Otherwise, the new + * line won't start at the first column.*/ + new.c_oflag |= OPOST; + CATCH_EINTR(err = tcsetattr(fd, TCSAFLUSH, &new)); + if (err) + goto error; + } + err = generic_write(fd, buf, n, NULL); + /* Restore raw mode, in any case; we *must* ignore any error apart + * EINTR, except for debug.*/ + if(isatty(fd)) + CATCH_EINTR(tcsetattr(fd, TCSAFLUSH, &save)); + return(err); +error: + return(-errno); +} + +/* + * UML SIGWINCH handling + * + * The point of this is to handle SIGWINCH on consoles which have host ttys and + * relay them inside UML to whatever might be running on the console and cares + * about the window size (since SIGWINCH notifies about terminal size changes). + * + * So, we have a separate thread for each host tty attached to a UML device + * (side-issue - I'm annoyed that one thread can't have multiple controlling + * ttys for purposed of handling SIGWINCH, but I imagine there are other reasons + * that doesn't make any sense). + * + * SIGWINCH can't be received synchronously, so you have to set up to receive it + * as a signal. That being the case, if you are going to wait for it, it is + * convenient to sit in a pause() and wait for the signal to bounce you out of + * it (see below for how we make sure to exit only on SIGWINCH). + */ + +static void winch_handler(int sig) +{ +} + +struct winch_data { + int pty_fd; + int pipe_fd; + int close_me; +}; + +static int winch_thread(void *arg) +{ + struct winch_data *data = arg; + sigset_t sigs; + int pty_fd, pipe_fd; + int count, err; + char c = 1; + + os_close_file(data->close_me); + pty_fd = data->pty_fd; + pipe_fd = data->pipe_fd; + count = os_write_file(pipe_fd, &c, sizeof(c)); + if(count != sizeof(c)) + printk("winch_thread : failed to write synchronization " + "byte, err = %d\n", -count); + + /* We are not using SIG_IGN on purpose, so don't fix it as I thought to + * do! If using SIG_IGN, the pause() call below would not stop on + * SIGWINCH. */ + + signal(SIGWINCH, winch_handler); + sigfillset(&sigs); + sigdelset(&sigs, SIGWINCH); + /* Block anything else than SIGWINCH. */ + if(sigprocmask(SIG_SETMASK, &sigs, NULL) < 0){ + printk("winch_thread : sigprocmask failed, errno = %d\n", + errno); + exit(1); + } + + if(setsid() < 0){ + printk("winch_thread : setsid failed, errno = %d\n", errno); + exit(1); + } + + err = os_new_tty_pgrp(pty_fd, os_getpid()); + if(err < 0){ + printk("winch_thread : new_tty_pgrp failed, err = %d\n", -err); + exit(1); + } + + /* These are synchronization calls between various UML threads on the + * host - since they are not different kernel threads, we cannot use + * kernel semaphores. We don't use SysV semaphores because they are + * persistant. */ + count = os_read_file(pipe_fd, &c, sizeof(c)); + if(count != sizeof(c)) + printk("winch_thread : failed to read synchronization byte, " + "err = %d\n", -count); + + while(1){ + /* This will be interrupted by SIGWINCH only, since other signals + * are blocked.*/ + pause(); + + count = os_write_file(pipe_fd, &c, sizeof(c)); + if(count != sizeof(c)) + printk("winch_thread : write failed, err = %d\n", + -count); + } +} + +static int winch_tramp(int fd, struct tty_struct *tty, int *fd_out) +{ + struct winch_data data; + unsigned long stack; + int fds[2], pid, n, err; + char c; + + err = os_pipe(fds, 1, 1); + if(err < 0){ + printk("winch_tramp : os_pipe failed, err = %d\n", -err); + return(err); + } + + data = ((struct winch_data) { .pty_fd = fd, + .pipe_fd = fds[1], + .close_me = fds[0] } ); + pid = run_helper_thread(winch_thread, &data, 0, &stack, 0); + if(pid < 0){ + printk("fork of winch_thread failed - errno = %d\n", errno); + return(pid); + } + + os_close_file(fds[1]); + *fd_out = fds[0]; + n = os_read_file(fds[0], &c, sizeof(c)); + if(n != sizeof(c)){ + printk("winch_tramp : failed to read synchronization byte\n"); + printk("read failed, err = %d\n", -n); + printk("fd %d will not support SIGWINCH\n", fd); + *fd_out = -1; + } + return(pid); +} + +void register_winch(int fd, struct tty_struct *tty) +{ + int pid, thread, thread_fd; + int count; + char c = 1; + + if(!isatty(fd)) + return; + + pid = tcgetpgrp(fd); + if(!CHOOSE_MODE_PROC(is_tracer_winch, is_skas_winch, pid, fd, + tty) && (pid == -1)){ + thread = winch_tramp(fd, tty, &thread_fd); + if(fd != -1){ + register_winch_irq(thread_fd, fd, thread, tty); + + count = os_write_file(thread_fd, &c, sizeof(c)); |