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815 lines
18 KiB
815 lines
18 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* Provide access to virtual console memory. |
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* /dev/vcs: the screen as it is being viewed right now (possibly scrolled) |
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* /dev/vcsN: the screen of /dev/ttyN (1 <= N <= 63) |
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* [minor: N] |
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* |
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* /dev/vcsaN: idem, but including attributes, and prefixed with |
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* the 4 bytes lines,columns,x,y (as screendump used to give). |
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* Attribute/character pair is in native endianity. |
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* [minor: N+128] |
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* |
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* /dev/vcsuN: similar to /dev/vcsaN but using 4-byte unicode values |
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* instead of 1-byte screen glyph values. |
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* [minor: N+64] |
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* |
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* /dev/vcsuaN: same idea as /dev/vcsaN for unicode (not yet implemented). |
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* |
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* This replaces screendump and part of selection, so that the system |
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* administrator can control access using file system permissions. |
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* |
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* [email protected] - efter Friedas begravelse - 950211 |
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* |
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* [email protected] - modified not to send characters to wrong console |
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* - fixed some fatal off-by-one bugs (0-- no longer == -1 -> looping and looping and looping...) |
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* - making it shorter - scr_readw are macros which expand in PRETTY long code |
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*/ |
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|
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#include <linux/kernel.h> |
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#include <linux/major.h> |
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#include <linux/errno.h> |
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#include <linux/export.h> |
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#include <linux/tty.h> |
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#include <linux/interrupt.h> |
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#include <linux/mm.h> |
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#include <linux/init.h> |
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#include <linux/vt_kern.h> |
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#include <linux/selection.h> |
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#include <linux/kbd_kern.h> |
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#include <linux/console.h> |
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#include <linux/device.h> |
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#include <linux/sched.h> |
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#include <linux/fs.h> |
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#include <linux/poll.h> |
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#include <linux/signal.h> |
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#include <linux/slab.h> |
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#include <linux/notifier.h> |
|
|
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#include <linux/uaccess.h> |
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#include <asm/byteorder.h> |
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#include <asm/unaligned.h> |
|
|
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#define HEADER_SIZE 4u |
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#define CON_BUF_SIZE (CONFIG_BASE_SMALL ? 256 : PAGE_SIZE) |
|
|
|
/* |
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* Our minor space: |
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* |
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* 0 ... 63 glyph mode without attributes |
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* 64 ... 127 unicode mode without attributes |
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* 128 ... 191 glyph mode with attributes |
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* 192 ... 255 unused (reserved for unicode with attributes) |
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* |
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* This relies on MAX_NR_CONSOLES being <= 63, meaning 63 actual consoles |
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* with minors 0, 64, 128 and 192 being proxies for the foreground console. |
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*/ |
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#if MAX_NR_CONSOLES > 63 |
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#warning "/dev/vcs* devices may not accommodate more than 63 consoles" |
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#endif |
|
|
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#define console(inode) (iminor(inode) & 63) |
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#define use_unicode(inode) (iminor(inode) & 64) |
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#define use_attributes(inode) (iminor(inode) & 128) |
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|
|
|
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struct vcs_poll_data { |
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struct notifier_block notifier; |
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unsigned int cons_num; |
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int event; |
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wait_queue_head_t waitq; |
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struct fasync_struct *fasync; |
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}; |
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|
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static int |
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vcs_notifier(struct notifier_block *nb, unsigned long code, void *_param) |
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{ |
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struct vt_notifier_param *param = _param; |
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struct vc_data *vc = param->vc; |
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struct vcs_poll_data *poll = |
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container_of(nb, struct vcs_poll_data, notifier); |
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int currcons = poll->cons_num; |
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int fa_band; |
|
|
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switch (code) { |
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case VT_UPDATE: |
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fa_band = POLL_PRI; |
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break; |
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case VT_DEALLOCATE: |
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fa_band = POLL_HUP; |
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break; |
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default: |
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return NOTIFY_DONE; |
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} |
|
|
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if (currcons == 0) |
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currcons = fg_console; |
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else |
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currcons--; |
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if (currcons != vc->vc_num) |
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return NOTIFY_DONE; |
|
|
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poll->event = code; |
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wake_up_interruptible(&poll->waitq); |
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kill_fasync(&poll->fasync, SIGIO, fa_band); |
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return NOTIFY_OK; |
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} |
|
|
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static void |
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vcs_poll_data_free(struct vcs_poll_data *poll) |
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{ |
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unregister_vt_notifier(&poll->notifier); |
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kfree(poll); |
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} |
|
|
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static struct vcs_poll_data * |
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vcs_poll_data_get(struct file *file) |
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{ |
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struct vcs_poll_data *poll = file->private_data, *kill = NULL; |
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|
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if (poll) |
|
return poll; |
|
|
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poll = kzalloc(sizeof(*poll), GFP_KERNEL); |
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if (!poll) |
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return NULL; |
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poll->cons_num = console(file_inode(file)); |
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init_waitqueue_head(&poll->waitq); |
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poll->notifier.notifier_call = vcs_notifier; |
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/* |
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* In order not to lose any update event, we must pretend one might |
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* have occurred before we have a chance to register our notifier. |
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* This is also how user space has come to detect which kernels |
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* support POLLPRI on /dev/vcs* devices i.e. using poll() with |
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* POLLPRI and a zero timeout. |
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*/ |
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poll->event = VT_UPDATE; |
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|
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if (register_vt_notifier(&poll->notifier) != 0) { |
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kfree(poll); |
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return NULL; |
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} |
|
|
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/* |
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* This code may be called either through ->poll() or ->fasync(). |
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* If we have two threads using the same file descriptor, they could |
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* both enter this function, both notice that the structure hasn't |
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* been allocated yet and go ahead allocating it in parallel, but |
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* only one of them must survive and be shared otherwise we'd leak |
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* memory with a dangling notifier callback. |
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*/ |
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spin_lock(&file->f_lock); |
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if (!file->private_data) { |
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file->private_data = poll; |
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} else { |
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/* someone else raced ahead of us */ |
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kill = poll; |
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poll = file->private_data; |
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} |
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spin_unlock(&file->f_lock); |
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if (kill) |
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vcs_poll_data_free(kill); |
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|
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return poll; |
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} |
|
|
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/** |
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* vcs_vc -- return VC for @inode |
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* @inode: inode for which to return a VC |
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* @viewed: returns whether this console is currently foreground (viewed) |
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* |
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* Must be called with console_lock. |
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*/ |
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static struct vc_data *vcs_vc(struct inode *inode, bool *viewed) |
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{ |
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unsigned int currcons = console(inode); |
|
|
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WARN_CONSOLE_UNLOCKED(); |
|
|
|
if (currcons == 0) { |
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currcons = fg_console; |
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if (viewed) |
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*viewed = true; |
|
} else { |
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currcons--; |
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if (viewed) |
|
*viewed = false; |
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} |
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return vc_cons[currcons].d; |
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} |
|
|
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/** |
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* vcs_size -- return size for a VC in @vc |
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* @vc: which VC |
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* @attr: does it use attributes? |
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* @unicode: is it unicode? |
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* |
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* Must be called with console_lock. |
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*/ |
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static int vcs_size(const struct vc_data *vc, bool attr, bool unicode) |
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{ |
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int size; |
|
|
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WARN_CONSOLE_UNLOCKED(); |
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|
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size = vc->vc_rows * vc->vc_cols; |
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|
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if (attr) { |
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if (unicode) |
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return -EOPNOTSUPP; |
|
|
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size = 2 * size + HEADER_SIZE; |
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} else if (unicode) |
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size *= 4; |
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|
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return size; |
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} |
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|
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static loff_t vcs_lseek(struct file *file, loff_t offset, int orig) |
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{ |
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struct inode *inode = file_inode(file); |
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struct vc_data *vc; |
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int size; |
|
|
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console_lock(); |
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vc = vcs_vc(inode, NULL); |
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if (!vc) { |
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console_unlock(); |
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return -ENXIO; |
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} |
|
|
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size = vcs_size(vc, use_attributes(inode), use_unicode(inode)); |
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console_unlock(); |
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if (size < 0) |
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return size; |
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return fixed_size_llseek(file, offset, orig, size); |
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} |
|
|
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static int vcs_read_buf_uni(struct vc_data *vc, char *con_buf, |
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unsigned int pos, unsigned int count, bool viewed) |
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{ |
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unsigned int nr, row, col, maxcol = vc->vc_cols; |
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int ret; |
|
|
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ret = vc_uniscr_check(vc); |
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if (ret) |
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return ret; |
|
|
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pos /= 4; |
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row = pos / maxcol; |
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col = pos % maxcol; |
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nr = maxcol - col; |
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do { |
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if (nr > count / 4) |
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nr = count / 4; |
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vc_uniscr_copy_line(vc, con_buf, viewed, row, col, nr); |
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con_buf += nr * 4; |
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count -= nr * 4; |
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row++; |
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col = 0; |
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nr = maxcol; |
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} while (count); |
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|
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return 0; |
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} |
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|
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static void vcs_read_buf_noattr(const struct vc_data *vc, char *con_buf, |
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unsigned int pos, unsigned int count, bool viewed) |
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{ |
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u16 *org; |
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unsigned int col, maxcol = vc->vc_cols; |
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|
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org = screen_pos(vc, pos, viewed); |
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col = pos % maxcol; |
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pos += maxcol - col; |
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|
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while (count-- > 0) { |
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*con_buf++ = (vcs_scr_readw(vc, org++) & 0xff); |
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if (++col == maxcol) { |
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org = screen_pos(vc, pos, viewed); |
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col = 0; |
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pos += maxcol; |
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} |
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} |
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} |
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|
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static unsigned int vcs_read_buf(const struct vc_data *vc, char *con_buf, |
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unsigned int pos, unsigned int count, bool viewed, |
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unsigned int *skip) |
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{ |
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u16 *org, *con_buf16; |
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unsigned int col, maxcol = vc->vc_cols; |
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unsigned int filled = count; |
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|
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if (pos < HEADER_SIZE) { |
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/* clamp header values if they don't fit */ |
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con_buf[0] = min(vc->vc_rows, 0xFFu); |
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con_buf[1] = min(vc->vc_cols, 0xFFu); |
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getconsxy(vc, con_buf + 2); |
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|
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*skip += pos; |
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count += pos; |
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if (count > CON_BUF_SIZE) { |
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count = CON_BUF_SIZE; |
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filled = count - pos; |
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} |
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|
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/* Advance state pointers and move on. */ |
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count -= min(HEADER_SIZE, count); |
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pos = HEADER_SIZE; |
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con_buf += HEADER_SIZE; |
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/* If count >= 0, then pos is even... */ |
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} else if (pos & 1) { |
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/* |
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* Skip first byte for output if start address is odd. Update |
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* region sizes up/down depending on free space in buffer. |
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*/ |
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(*skip)++; |
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if (count < CON_BUF_SIZE) |
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count++; |
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else |
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filled--; |
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} |
|
|
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if (!count) |
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return filled; |
|
|
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pos -= HEADER_SIZE; |
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pos /= 2; |
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col = pos % maxcol; |
|
|
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org = screen_pos(vc, pos, viewed); |
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pos += maxcol - col; |
|
|
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/* |
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* Buffer has even length, so we can always copy character + attribute. |
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* We do not copy last byte to userspace if count is odd. |
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*/ |
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count = (count + 1) / 2; |
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con_buf16 = (u16 *)con_buf; |
|
|
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while (count) { |
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*con_buf16++ = vcs_scr_readw(vc, org++); |
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count--; |
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if (++col == maxcol) { |
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org = screen_pos(vc, pos, viewed); |
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col = 0; |
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pos += maxcol; |
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} |
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} |
|
|
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return filled; |
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} |
|
|
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static ssize_t |
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vcs_read(struct file *file, char __user *buf, size_t count, loff_t *ppos) |
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{ |
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struct inode *inode = file_inode(file); |
|
struct vc_data *vc; |
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struct vcs_poll_data *poll; |
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unsigned int read; |
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ssize_t ret; |
|
char *con_buf; |
|
loff_t pos; |
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bool viewed, attr, uni_mode; |
|
|
|
con_buf = (char *) __get_free_page(GFP_KERNEL); |
|
if (!con_buf) |
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return -ENOMEM; |
|
|
|
pos = *ppos; |
|
|
|
/* Select the proper current console and verify |
|
* sanity of the situation under the console lock. |
|
*/ |
|
console_lock(); |
|
|
|
uni_mode = use_unicode(inode); |
|
attr = use_attributes(inode); |
|
ret = -ENXIO; |
|
vc = vcs_vc(inode, &viewed); |
|
if (!vc) |
|
goto unlock_out; |
|
|
|
ret = -EINVAL; |
|
if (pos < 0) |
|
goto unlock_out; |
|
/* we enforce 32-bit alignment for pos and count in unicode mode */ |
|
if (uni_mode && (pos | count) & 3) |
|
goto unlock_out; |
|
|
|
poll = file->private_data; |
|
if (count && poll) |
|
poll->event = 0; |
|
read = 0; |
|
ret = 0; |
|
while (count) { |
|
unsigned int this_round, skip = 0; |
|
int size; |
|
|
|
/* Check whether we are above size each round, |
|
* as copy_to_user at the end of this loop |
|
* could sleep. |
|
*/ |
|
size = vcs_size(vc, attr, uni_mode); |
|
if (size < 0) { |
|
if (read) |
|
break; |
|
ret = size; |
|
goto unlock_out; |
|
} |
|
if (pos >= size) |
|
break; |
|
if (count > size - pos) |
|
count = size - pos; |
|
|
|
this_round = count; |
|
if (this_round > CON_BUF_SIZE) |
|
this_round = CON_BUF_SIZE; |
|
|
|
/* Perform the whole read into the local con_buf. |
|
* Then we can drop the console spinlock and safely |
|
* attempt to move it to userspace. |
|
*/ |
|
|
|
if (uni_mode) { |
|
ret = vcs_read_buf_uni(vc, con_buf, pos, this_round, |
|
viewed); |
|
if (ret) |
|
break; |
|
} else if (!attr) { |
|
vcs_read_buf_noattr(vc, con_buf, pos, this_round, |
|
viewed); |
|
} else { |
|
this_round = vcs_read_buf(vc, con_buf, pos, this_round, |
|
viewed, &skip); |
|
} |
|
|
|
/* Finally, release the console semaphore while we push |
|
* all the data to userspace from our temporary buffer. |
|
* |
|
* AKPM: Even though it's a semaphore, we should drop it because |
|
* the pagefault handling code may want to call printk(). |
|
*/ |
|
|
|
console_unlock(); |
|
ret = copy_to_user(buf, con_buf + skip, this_round); |
|
console_lock(); |
|
|
|
if (ret) { |
|
read += this_round - ret; |
|
ret = -EFAULT; |
|
break; |
|
} |
|
buf += this_round; |
|
pos += this_round; |
|
read += this_round; |
|
count -= this_round; |
|
} |
|
*ppos += read; |
|
if (read) |
|
ret = read; |
|
unlock_out: |
|
console_unlock(); |
|
free_page((unsigned long) con_buf); |
|
return ret; |
|
} |
|
|
|
static u16 *vcs_write_buf_noattr(struct vc_data *vc, const char *con_buf, |
|
unsigned int pos, unsigned int count, bool viewed, u16 **org0) |
|
{ |
|
u16 *org; |
|
unsigned int col, maxcol = vc->vc_cols; |
|
|
|
*org0 = org = screen_pos(vc, pos, viewed); |
|
col = pos % maxcol; |
|
pos += maxcol - col; |
|
|
|
while (count > 0) { |
|
unsigned char c = *con_buf++; |
|
|
|
count--; |
|
vcs_scr_writew(vc, |
|
(vcs_scr_readw(vc, org) & 0xff00) | c, org); |
|
org++; |
|
if (++col == maxcol) { |
|
org = screen_pos(vc, pos, viewed); |
|
col = 0; |
|
pos += maxcol; |
|
} |
|
} |
|
|
|
return org; |
|
} |
|
|
|
/* |
|
* Compilers (gcc 10) are unable to optimize the swap in cpu_to_le16. So do it |
|
* the poor man way. |
|
*/ |
|
static inline u16 vc_compile_le16(u8 hi, u8 lo) |
|
{ |
|
#ifdef __BIG_ENDIAN |
|
return (lo << 8u) | hi; |
|
#else |
|
return (hi << 8u) | lo; |
|
#endif |
|
} |
|
|
|
static u16 *vcs_write_buf(struct vc_data *vc, const char *con_buf, |
|
unsigned int pos, unsigned int count, bool viewed, u16 **org0) |
|
{ |
|
u16 *org; |
|
unsigned int col, maxcol = vc->vc_cols; |
|
unsigned char c; |
|
|
|
/* header */ |
|
if (pos < HEADER_SIZE) { |
|
char header[HEADER_SIZE]; |
|
|
|
getconsxy(vc, header + 2); |
|
while (pos < HEADER_SIZE && count > 0) { |
|
count--; |
|
header[pos++] = *con_buf++; |
|
} |
|
if (!viewed) |
|
putconsxy(vc, header + 2); |
|
} |
|
|
|
if (!count) |
|
return NULL; |
|
|
|
pos -= HEADER_SIZE; |
|
col = (pos/2) % maxcol; |
|
|
|
*org0 = org = screen_pos(vc, pos/2, viewed); |
|
|
|
/* odd pos -- the first single character */ |
|
if (pos & 1) { |
|
count--; |
|
c = *con_buf++; |
|
vcs_scr_writew(vc, vc_compile_le16(c, vcs_scr_readw(vc, org)), |
|
org); |
|
org++; |
|
pos++; |
|
if (++col == maxcol) { |
|
org = screen_pos(vc, pos/2, viewed); |
|
col = 0; |
|
} |
|
} |
|
|
|
pos /= 2; |
|
pos += maxcol - col; |
|
|
|
/* even pos -- handle attr+character pairs */ |
|
while (count > 1) { |
|
unsigned short w; |
|
|
|
w = get_unaligned(((unsigned short *)con_buf)); |
|
vcs_scr_writew(vc, w, org++); |
|
con_buf += 2; |
|
count -= 2; |
|
if (++col == maxcol) { |
|
org = screen_pos(vc, pos, viewed); |
|
col = 0; |
|
pos += maxcol; |
|
} |
|
} |
|
|
|
if (!count) |
|
return org; |
|
|
|
/* odd pos -- the remaining character */ |
|
c = *con_buf++; |
|
vcs_scr_writew(vc, vc_compile_le16(vcs_scr_readw(vc, org) >> 8, c), |
|
org); |
|
|
|
return org; |
|
} |
|
|
|
static ssize_t |
|
vcs_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos) |
|
{ |
|
struct inode *inode = file_inode(file); |
|
struct vc_data *vc; |
|
char *con_buf; |
|
u16 *org0, *org; |
|
unsigned int written; |
|
int size; |
|
ssize_t ret; |
|
loff_t pos; |
|
bool viewed, attr; |
|
|
|
if (use_unicode(inode)) |
|
return -EOPNOTSUPP; |
|
|
|
con_buf = (char *) __get_free_page(GFP_KERNEL); |
|
if (!con_buf) |
|
return -ENOMEM; |
|
|
|
pos = *ppos; |
|
|
|
/* Select the proper current console and verify |
|
* sanity of the situation under the console lock. |
|
*/ |
|
console_lock(); |
|
|
|
attr = use_attributes(inode); |
|
ret = -ENXIO; |
|
vc = vcs_vc(inode, &viewed); |
|
if (!vc) |
|
goto unlock_out; |
|
|
|
size = vcs_size(vc, attr, false); |
|
if (size < 0) { |
|
ret = size; |
|
goto unlock_out; |
|
} |
|
ret = -EINVAL; |
|
if (pos < 0 || pos > size) |
|
goto unlock_out; |
|
if (count > size - pos) |
|
count = size - pos; |
|
written = 0; |
|
while (count) { |
|
unsigned int this_round = count; |
|
|
|
if (this_round > CON_BUF_SIZE) |
|
this_round = CON_BUF_SIZE; |
|
|
|
/* Temporarily drop the console lock so that we can read |
|
* in the write data from userspace safely. |
|
*/ |
|
console_unlock(); |
|
ret = copy_from_user(con_buf, buf, this_round); |
|
console_lock(); |
|
|
|
if (ret) { |
|
this_round -= ret; |
|
if (!this_round) { |
|
/* Abort loop if no data were copied. Otherwise |
|
* fail with -EFAULT. |
|
*/ |
|
if (written) |
|
break; |
|
ret = -EFAULT; |
|
goto unlock_out; |
|
} |
|
} |
|
|
|
/* The vcs_size might have changed while we slept to grab |
|
* the user buffer, so recheck. |
|
* Return data written up to now on failure. |
|
*/ |
|
size = vcs_size(vc, attr, false); |
|
if (size < 0) { |
|
if (written) |
|
break; |
|
ret = size; |
|
goto unlock_out; |
|
} |
|
if (pos >= size) |
|
break; |
|
if (this_round > size - pos) |
|
this_round = size - pos; |
|
|
|
/* OK, now actually push the write to the console |
|
* under the lock using the local kernel buffer. |
|
*/ |
|
|
|
if (attr) |
|
org = vcs_write_buf(vc, con_buf, pos, this_round, |
|
viewed, &org0); |
|
else |
|
org = vcs_write_buf_noattr(vc, con_buf, pos, this_round, |
|
viewed, &org0); |
|
|
|
count -= this_round; |
|
written += this_round; |
|
buf += this_round; |
|
pos += this_round; |
|
if (org) |
|
update_region(vc, (unsigned long)(org0), org - org0); |
|
} |
|
*ppos += written; |
|
ret = written; |
|
if (written) |
|
vcs_scr_updated(vc); |
|
|
|
unlock_out: |
|
console_unlock(); |
|
free_page((unsigned long) con_buf); |
|
return ret; |
|
} |
|
|
|
static __poll_t |
|
vcs_poll(struct file *file, poll_table *wait) |
|
{ |
|
struct vcs_poll_data *poll = vcs_poll_data_get(file); |
|
__poll_t ret = DEFAULT_POLLMASK|EPOLLERR; |
|
|
|
if (poll) { |
|
poll_wait(file, &poll->waitq, wait); |
|
switch (poll->event) { |
|
case VT_UPDATE: |
|
ret = DEFAULT_POLLMASK|EPOLLPRI; |
|
break; |
|
case VT_DEALLOCATE: |
|
ret = DEFAULT_POLLMASK|EPOLLHUP|EPOLLERR; |
|
break; |
|
case 0: |
|
ret = DEFAULT_POLLMASK; |
|
break; |
|
} |
|
} |
|
return ret; |
|
} |
|
|
|
static int |
|
vcs_fasync(int fd, struct file *file, int on) |
|
{ |
|
struct vcs_poll_data *poll = file->private_data; |
|
|
|
if (!poll) { |
|
/* don't allocate anything if all we want is disable fasync */ |
|
if (!on) |
|
return 0; |
|
poll = vcs_poll_data_get(file); |
|
if (!poll) |
|
return -ENOMEM; |
|
} |
|
|
|
return fasync_helper(fd, file, on, &poll->fasync); |
|
} |
|
|
|
static int |
|
vcs_open(struct inode *inode, struct file *filp) |
|
{ |
|
unsigned int currcons = console(inode); |
|
bool attr = use_attributes(inode); |
|
bool uni_mode = use_unicode(inode); |
|
int ret = 0; |
|
|
|
/* we currently don't support attributes in unicode mode */ |
|
if (attr && uni_mode) |
|
return -EOPNOTSUPP; |
|
|
|
console_lock(); |
|
if(currcons && !vc_cons_allocated(currcons-1)) |
|
ret = -ENXIO; |
|
console_unlock(); |
|
return ret; |
|
} |
|
|
|
static int vcs_release(struct inode *inode, struct file *file) |
|
{ |
|
struct vcs_poll_data *poll = file->private_data; |
|
|
|
if (poll) |
|
vcs_poll_data_free(poll); |
|
return 0; |
|
} |
|
|
|
static const struct file_operations vcs_fops = { |
|
.llseek = vcs_lseek, |
|
.read = vcs_read, |
|
.write = vcs_write, |
|
.poll = vcs_poll, |
|
.fasync = vcs_fasync, |
|
.open = vcs_open, |
|
.release = vcs_release, |
|
}; |
|
|
|
static struct class *vc_class; |
|
|
|
void vcs_make_sysfs(int index) |
|
{ |
|
device_create(vc_class, NULL, MKDEV(VCS_MAJOR, index + 1), NULL, |
|
"vcs%u", index + 1); |
|
device_create(vc_class, NULL, MKDEV(VCS_MAJOR, index + 65), NULL, |
|
"vcsu%u", index + 1); |
|
device_create(vc_class, NULL, MKDEV(VCS_MAJOR, index + 129), NULL, |
|
"vcsa%u", index + 1); |
|
} |
|
|
|
void vcs_remove_sysfs(int index) |
|
{ |
|
device_destroy(vc_class, MKDEV(VCS_MAJOR, index + 1)); |
|
device_destroy(vc_class, MKDEV(VCS_MAJOR, index + 65)); |
|
device_destroy(vc_class, MKDEV(VCS_MAJOR, index + 129)); |
|
} |
|
|
|
int __init vcs_init(void) |
|
{ |
|
unsigned int i; |
|
|
|
if (register_chrdev(VCS_MAJOR, "vcs", &vcs_fops)) |
|
panic("unable to get major %d for vcs device", VCS_MAJOR); |
|
vc_class = class_create(THIS_MODULE, "vc"); |
|
|
|
device_create(vc_class, NULL, MKDEV(VCS_MAJOR, 0), NULL, "vcs"); |
|
device_create(vc_class, NULL, MKDEV(VCS_MAJOR, 64), NULL, "vcsu"); |
|
device_create(vc_class, NULL, MKDEV(VCS_MAJOR, 128), NULL, "vcsa"); |
|
for (i = 0; i < MIN_NR_CONSOLES; i++) |
|
vcs_make_sysfs(i); |
|
return 0; |
|
}
|
|
|