diff options
Diffstat (limited to 'drivers/tty/vt/vt_ioctl.c')
| -rw-r--r-- | drivers/tty/vt/vt_ioctl.c | 1023 |
1 files changed, 519 insertions, 504 deletions
diff --git a/drivers/tty/vt/vt_ioctl.c b/drivers/tty/vt/vt_ioctl.c index daf61c28ba76..a4e520bdd521 100644 --- a/drivers/tty/vt/vt_ioctl.c +++ b/drivers/tty/vt/vt_ioctl.c @@ -241,136 +241,56 @@ int vt_waitactive(int n) #define GPLAST 0x3df #define GPNUM (GPLAST - GPFIRST + 1) - - -static inline int -do_fontx_ioctl(int cmd, struct consolefontdesc __user *user_cfd, int perm, struct console_font_op *op) -{ - struct consolefontdesc cfdarg; - int i; - - if (copy_from_user(&cfdarg, user_cfd, sizeof(struct consolefontdesc))) - return -EFAULT; - - switch (cmd) { - case PIO_FONTX: - if (!perm) - return -EPERM; - op->op = KD_FONT_OP_SET; - op->flags = KD_FONT_FLAG_OLD; - op->width = 8; - op->height = cfdarg.charheight; - op->charcount = cfdarg.charcount; - op->data = cfdarg.chardata; - return con_font_op(vc_cons[fg_console].d, op); - case GIO_FONTX: { - op->op = KD_FONT_OP_GET; - op->flags = KD_FONT_FLAG_OLD; - op->width = 8; - op->height = cfdarg.charheight; - op->charcount = cfdarg.charcount; - op->data = cfdarg.chardata; - i = con_font_op(vc_cons[fg_console].d, op); - if (i) - return i; - cfdarg.charheight = op->height; - cfdarg.charcount = op->charcount; - if (copy_to_user(user_cfd, &cfdarg, sizeof(struct consolefontdesc))) - return -EFAULT; - return 0; - } - } - return -EINVAL; -} - -static inline int -do_unimap_ioctl(int cmd, struct unimapdesc __user *user_ud, int perm, struct vc_data *vc) +/* + * currently, setting the mode from KD_TEXT to KD_GRAPHICS doesn't do a whole + * lot. i'm not sure if it should do any restoration of modes or what... + * + * XXX It should at least call into the driver, fbdev's definitely need to + * restore their engine state. --BenH + */ +static int vt_kdsetmode(struct vc_data *vc, unsigned long mode) { - struct unimapdesc tmp; - - if (copy_from_user(&tmp, user_ud, sizeof tmp)) - return -EFAULT; - switch (cmd) { - case PIO_UNIMAP: - if (!perm) - return -EPERM; - return con_set_unimap(vc, tmp.entry_ct, tmp.entries); - case GIO_UNIMAP: - if (!perm && fg_console != vc->vc_num) - return -EPERM; - return con_get_unimap(vc, tmp.entry_ct, &(user_ud->entry_ct), tmp.entries); + switch (mode) { + case KD_GRAPHICS: + break; + case KD_TEXT0: + case KD_TEXT1: + mode = KD_TEXT; + fallthrough; + case KD_TEXT: + break; + default: + return -EINVAL; } - return 0; -} - -/* deallocate a single console, if possible (leave 0) */ -static int vt_disallocate(unsigned int vc_num) -{ - struct vc_data *vc = NULL; - int ret = 0; - - console_lock(); - if (vt_busy(vc_num)) - ret = -EBUSY; - else if (vc_num) - vc = vc_deallocate(vc_num); - console_unlock(); - if (vc && vc_num >= MIN_NR_CONSOLES) - tty_port_put(&vc->port); - - return ret; -} + /* FIXME: this needs the console lock extending */ + if (vc->vc_mode == mode) + return 0; -/* deallocate all unused consoles, but leave 0 */ -static void vt_disallocate_all(void) -{ - struct vc_data *vc[MAX_NR_CONSOLES]; - int i; + vc->vc_mode = mode; + if (vc->vc_num != fg_console) + return 0; + /* explicitly blank/unblank the screen if switching modes */ console_lock(); - for (i = 1; i < MAX_NR_CONSOLES; i++) - if (!vt_busy(i)) - vc[i] = vc_deallocate(i); - else - vc[i] = NULL; + if (mode == KD_TEXT) + do_unblank_screen(1); + else + do_blank_screen(1); console_unlock(); - for (i = 1; i < MAX_NR_CONSOLES; i++) { - if (vc[i] && i >= MIN_NR_CONSOLES) - tty_port_put(&vc[i]->port); - } + return 0; } - -/* - * We handle the console-specific ioctl's here. We allow the - * capability to modify any console, not just the fg_console. - */ -int vt_ioctl(struct tty_struct *tty, - unsigned int cmd, unsigned long arg) +static int vt_k_ioctl(struct tty_struct *tty, unsigned int cmd, + unsigned long arg, bool perm) { struct vc_data *vc = tty->driver_data; - struct console_font_op op; /* used in multiple places here */ - unsigned int console = vc->vc_num; - unsigned char ucval; - unsigned int uival; void __user *up = (void __user *)arg; - int i, perm; - int ret = 0; + unsigned int console = vc->vc_num; + int ret; - /* - * To have permissions to do most of the vt ioctls, we either have - * to be the owner of the tty, or have CAP_SYS_TTY_CONFIG. - */ - perm = 0; - if (current->signal->tty == tty || capable(CAP_SYS_TTY_CONFIG)) - perm = 1; - switch (cmd) { - case TIOCLINUX: - ret = tioclinux(tty, arg); - break; case KIOCSOUND: if (!perm) return -EPERM; @@ -390,7 +310,7 @@ int vt_ioctl(struct tty_struct *tty, return -EPERM; { unsigned int ticks, count; - + /* * Generate the tone for the appropriate number of ticks. * If the time is zero, turn off sound ourselves. @@ -407,9 +327,7 @@ int vt_ioctl(struct tty_struct *tty, /* * this is naïve. */ - ucval = KB_101; - ret = put_user(ucval, (char __user *)arg); - break; + return put_user(KB_101, (char __user *)arg); /* * These cannot be implemented on any machine that implements @@ -426,84 +344,45 @@ int vt_ioctl(struct tty_struct *tty, * * These are locked internally via sys_ioperm */ - if (arg < GPFIRST || arg > GPLAST) { - ret = -EINVAL; - break; - } - ret = ksys_ioperm(arg, 1, (cmd == KDADDIO)) ? -ENXIO : 0; - break; + if (arg < GPFIRST || arg > GPLAST) + return -EINVAL; + + return ksys_ioperm(arg, 1, (cmd == KDADDIO)) ? -ENXIO : 0; case KDENABIO: case KDDISABIO: - ret = ksys_ioperm(GPFIRST, GPNUM, + return ksys_ioperm(GPFIRST, GPNUM, (cmd == KDENABIO)) ? -ENXIO : 0; - break; #endif /* Linux m68k/i386 interface for setting the keyboard delay/repeat rate */ - + case KDKBDREP: { struct kbd_repeat kbrep; - + if (!capable(CAP_SYS_TTY_CONFIG)) return -EPERM; - if (copy_from_user(&kbrep, up, sizeof(struct kbd_repeat))) { - ret = -EFAULT; - break; - } + if (copy_from_user(&kbrep, up, sizeof(struct kbd_repeat))) + return -EFAULT; + ret = kbd_rate(&kbrep); if (ret) - break; + return ret; if (copy_to_user(up, &kbrep, sizeof(struct kbd_repeat))) - ret = -EFAULT; + return -EFAULT; break; } case KDSETMODE: - /* - * currently, setting the mode from KD_TEXT to KD_GRAPHICS - * doesn't do a whole lot. i'm not sure if it should do any - * restoration of modes or what... - * - * XXX It should at least call into the driver, fbdev's definitely - * need to restore their engine state. --BenH - */ if (!perm) return -EPERM; - switch (arg) { - case KD_GRAPHICS: - break; - case KD_TEXT0: - case KD_TEXT1: - arg = KD_TEXT; - case KD_TEXT: - break; - default: - ret = -EINVAL; - goto out; - } - /* FIXME: this needs the console lock extending */ - if (vc->vc_mode == (unsigned char) arg) - break; - vc->vc_mode = (unsigned char) arg; - if (console != fg_console) - break; - /* - * explicitly blank/unblank the screen if switching modes - */ - console_lock(); - if (arg == KD_TEXT) - do_unblank_screen(1); - else - do_blank_screen(1); - console_unlock(); - break; + + return vt_kdsetmode(vc, arg); case KDGETMODE: - uival = vc->vc_mode; - goto setint; + return put_user(vc->vc_mode, (int __user *)arg); case KDMAPDISP: case KDUNMAPDISP: @@ -511,51 +390,42 @@ int vt_ioctl(struct tty_struct *tty, * these work like a combination of mmap and KDENABIO. * this could be easily finished. */ - ret = -EINVAL; - break; + return -EINVAL; case KDSKBMODE: if (!perm) return -EPERM; ret = vt_do_kdskbmode(console, arg); - if (ret == 0) - tty_ldisc_flush(tty); + if (ret) + return ret; + tty_ldisc_flush(tty); break; case KDGKBMODE: - uival = vt_do_kdgkbmode(console); - ret = put_user(uival, (int __user *)arg); - break; + return put_user(vt_do_kdgkbmode(console), (int __user *)arg); /* this could be folded into KDSKBMODE, but for compatibility reasons it is not so easy to fold KDGKBMETA into KDGKBMODE */ case KDSKBMETA: - ret = vt_do_kdskbmeta(console, arg); - break; + return vt_do_kdskbmeta(console, arg); case KDGKBMETA: /* FIXME: should review whether this is worth locking */ - uival = vt_do_kdgkbmeta(console); - setint: - ret = put_user(uival, (int __user *)arg); - break; + return put_user(vt_do_kdgkbmeta(console), (int __user *)arg); case KDGETKEYCODE: case KDSETKEYCODE: if(!capable(CAP_SYS_TTY_CONFIG)) perm = 0; - ret = vt_do_kbkeycode_ioctl(cmd, up, perm); - break; + return vt_do_kbkeycode_ioctl(cmd, up, perm); case KDGKBENT: case KDSKBENT: - ret = vt_do_kdsk_ioctl(cmd, up, perm, console); - break; + return vt_do_kdsk_ioctl(cmd, up, perm, console); case KDGKBSENT: case KDSKBSENT: - ret = vt_do_kdgkb_ioctl(cmd, up, perm); - break; + return vt_do_kdgkb_ioctl(cmd, up, perm); /* Diacritical processing. Handled in keyboard.c as it has to operate on the keyboard locks and structures */ @@ -563,8 +433,7 @@ int vt_ioctl(struct tty_struct *tty, case KDGKBDIACRUC: case KDSKBDIACR: case KDSKBDIACRUC: - ret = vt_do_diacrit(cmd, up, perm); - break; + return vt_do_diacrit(cmd, up, perm); /* the ioctls below read/set the flags usually shown in the leds */ /* don't use them - they will go away without warning */ @@ -572,8 +441,7 @@ int vt_ioctl(struct tty_struct *tty, case KDSKBLED: case KDGETLED: case KDSETLED: - ret = vt_do_kdskled(console, cmd, arg, perm); - break; + return vt_do_kdskled(console, cmd, arg, perm); /* * A process can indicate its willingness to accept signals @@ -583,35 +451,426 @@ int vt_ioctl(struct tty_struct *tty, * See also the kbrequest field of inittab(5). */ case KDSIGACCEPT: - { if (!perm || !capable(CAP_KILL)) return -EPERM; if (!valid_signal(arg) || arg < 1 || arg == SIGKILL) - ret = -EINVAL; - else { - spin_lock_irq(&vt_spawn_con.lock); - put_pid(vt_spawn_con.pid); - vt_spawn_con.pid = get_pid(task_pid(current)); - vt_spawn_con.sig = arg; - spin_unlock_irq(&vt_spawn_con.lock); + return -EINVAL; + + spin_lock_irq(&vt_spawn_con.lock); + put_pid(vt_spawn_con.pid); + vt_spawn_con.pid = get_pid(task_pid(current)); + vt_spawn_con.sig = arg; + spin_unlock_irq(&vt_spawn_con.lock); + break; + + case KDFONTOP: { + struct console_font_op op; + + if (copy_from_user(&op, up, sizeof(op))) + return -EFAULT; + if (!perm && op.op != KD_FONT_OP_GET) + return -EPERM; + ret = con_font_op(vc, &op); + if (ret) + return ret; + if (copy_to_user(up, &op, sizeof(op))) + return -EFAULT; + break; + } + + default: + return -ENOIOCTLCMD; + } + + return 0; +} + +static inline int do_fontx_ioctl(int cmd, + struct consolefontdesc __user *user_cfd, + struct console_font_op *op) +{ + struct consolefontdesc cfdarg; + int i; + + if (copy_from_user(&cfdarg, user_cfd, sizeof(struct consolefontdesc))) + return -EFAULT; + + switch (cmd) { + case PIO_FONTX: + op->op = KD_FONT_OP_SET; + op->flags = KD_FONT_FLAG_OLD; + op->width = 8; + op->height = cfdarg.charheight; + op->charcount = cfdarg.charcount; + op->data = cfdarg.chardata; + return con_font_op(vc_cons[fg_console].d, op); + case GIO_FONTX: { + op->op = KD_FONT_OP_GET; + op->flags = KD_FONT_FLAG_OLD; + op->width = 8; + op->height = cfdarg.charheight; + op->charcount = cfdarg.charcount; + op->data = cfdarg.chardata; + i = con_font_op(vc_cons[fg_console].d, op); + if (i) + return i; + cfdarg.charheight = op->height; + cfdarg.charcount = op->charcount; + if (copy_to_user(user_cfd, &cfdarg, sizeof(struct consolefontdesc))) + return -EFAULT; + return 0; } + } + return -EINVAL; +} + +static int vt_io_fontreset(struct console_font_op *op) +{ + int ret; + + if (__is_defined(BROKEN_GRAPHICS_PROGRAMS)) { + /* + * With BROKEN_GRAPHICS_PROGRAMS defined, the default font is + * not saved. + */ + return -ENOSYS; + } + + op->op = KD_FONT_OP_SET_DEFAULT; + op->data = NULL; + ret = con_font_op(vc_cons[fg_console].d, op); + if (ret) + return ret; + + console_lock(); + con_set_default_unimap(vc_cons[fg_console].d); + console_unlock(); + + return 0; +} + +static inline int do_unimap_ioctl(int cmd, struct unimapdesc __user *user_ud, + struct vc_data *vc) +{ + struct unimapdesc tmp; + + if (copy_from_user(&tmp, user_ud, sizeof tmp)) + return -EFAULT; + switch (cmd) { + case PIO_UNIMAP: + return con_set_unimap(vc, tmp.entry_ct, tmp.entries); + case GIO_UNIMAP: + if (fg_console != vc->vc_num) + return -EPERM; + return con_get_unimap(vc, tmp.entry_ct, &(user_ud->entry_ct), + tmp.entries); + } + return 0; +} + +static int vt_io_ioctl(struct vc_data *vc, unsigned int cmd, void __user *up, + bool perm) +{ + struct console_font_op op; /* used in multiple places here */ + + switch (cmd) { + case PIO_FONT: + if (!perm) + return -EPERM; + op.op = KD_FONT_OP_SET; + op.flags = KD_FONT_FLAG_OLD | KD_FONT_FLAG_DONT_RECALC; /* Compatibility */ + op.width = 8; + op.height = 0; + op.charcount = 256; + op.data = up; + return con_font_op(vc_cons[fg_console].d, &op); + + case GIO_FONT: + op.op = KD_FONT_OP_GET; + op.flags = KD_FONT_FLAG_OLD; + op.width = 8; + op.height = 32; + op.charcount = 256; + op.data = up; + return con_font_op(vc_cons[fg_console].d, &op); + + case PIO_CMAP: + if (!perm) + return -EPERM; + return con_set_cmap(up); + + case GIO_CMAP: + return con_get_cmap(up); + + case PIO_FONTX: + if (!perm) + return -EPERM; + + fallthrough; + case GIO_FONTX: + return do_fontx_ioctl(cmd, up, &op); + + case PIO_FONTRESET: + if (!perm) + return -EPERM; + + return vt_io_fontreset(&op); + + case PIO_SCRNMAP: + if (!perm) + return -EPERM; + return con_set_trans_old(up); + + case GIO_SCRNMAP: + return con_get_trans_old(up); + + case PIO_UNISCRNMAP: + if (!perm) + return -EPERM; + return con_set_trans_new(up); + + case GIO_UNISCRNMAP: + return con_get_trans_new(up); + + case PIO_UNIMAPCLR: + if (!perm) + return -EPERM; + con_clear_unimap(vc); break; + + case PIO_UNIMAP: + case GIO_UNIMAP: + if (!perm) + return -EPERM; + + return do_unimap_ioctl(cmd, up, vc); + + default: + return -ENOIOCTLCMD; + } + + return 0; +} + +static int vt_reldisp(struct vc_data *vc, unsigned int swtch) +{ + int newvt, ret; + + if (vc->vt_mode.mode != VT_PROCESS) + return -EINVAL; + + /* Switched-to response */ + if (vc->vt_newvt < 0) { + /* If it's just an ACK, ignore it */ + return swtch == VT_ACKACQ ? 0 : -EINVAL; + } + + /* Switching-from response */ + if (swtch == 0) { + /* Switch disallowed, so forget we were trying to do it. */ + vc->vt_newvt = -1; + return 0; + } + + /* The current vt has been released, so complete the switch. */ + newvt = vc->vt_newvt; + vc->vt_newvt = -1; + ret = vc_allocate(newvt); + if (ret) + return ret; + + /* + * When we actually do the console switch, make sure we are atomic with + * respect to other console switches.. + */ + complete_change_console(vc_cons[newvt].d); + + return 0; +} + +static int vt_setactivate(struct vt_setactivate __user *sa) +{ + struct vt_setactivate vsa; + struct vc_data *nvc; + int ret; + + if (copy_from_user(&vsa, sa, sizeof(vsa))) + return -EFAULT; + if (vsa.console == 0 || vsa.console > MAX_NR_CONSOLES) + return -ENXIO; + + vsa.console = array_index_nospec(vsa.console, MAX_NR_CONSOLES + 1); + vsa.console--; + console_lock(); + ret = vc_allocate(vsa.console); + if (ret) { + console_unlock(); + return ret; + } + + /* + * This is safe providing we don't drop the console sem between + * vc_allocate and finishing referencing nvc. + */ + nvc = vc_cons[vsa.console].d; + nvc->vt_mode = vsa.mode; + nvc->vt_mode.frsig = 0; + put_pid(nvc->vt_pid); + nvc->vt_pid = get_pid(task_pid(current)); + console_unlock(); + + /* Commence switch and lock */ + /* Review set_console locks */ + set_console(vsa.console); + + return 0; +} + +/* deallocate a single console, if possible (leave 0) */ +static int vt_disallocate(unsigned int vc_num) +{ + struct vc_data *vc = NULL; + int ret = 0; + + console_lock(); + if (vt_busy(vc_num)) + ret = -EBUSY; + else if (vc_num) + vc = vc_deallocate(vc_num); + console_unlock(); + + if (vc && vc_num >= MIN_NR_CONSOLES) + tty_port_put(&vc->port); + + return ret; +} + +/* deallocate all unused consoles, but leave 0 */ +static void vt_disallocate_all(void) +{ + struct vc_data *vc[MAX_NR_CONSOLES]; + int i; + + console_lock(); + for (i = 1; i < MAX_NR_CONSOLES; i++) + if (!vt_busy(i)) + vc[i] = vc_deallocate(i); + else + vc[i] = NULL; + console_unlock(); + + for (i = 1; i < MAX_NR_CONSOLES; i++) { + if (vc[i] && i >= MIN_NR_CONSOLES) + tty_port_put(&vc[i]->port); + } +} + +static int vt_resizex(struct vc_data *vc, struct vt_consize __user *cs) +{ + struct vt_consize v; + int i; + + if (copy_from_user(&v, cs, sizeof(struct vt_consize))) + return -EFAULT; + + /* FIXME: Should check the copies properly */ + if (!v.v_vlin) + v.v_vlin = vc->vc_scan_lines; + + if (v.v_clin) { + int rows = v.v_vlin / v.v_clin; + if (v.v_rows != rows) { + if (v.v_rows) /* Parameters don't add up */ + return -EINVAL; + v.v_rows = rows; + } + } + + if (v.v_vcol && v.v_ccol) { + int cols = v.v_vcol / v.v_ccol; + if (v.v_cols != cols) { + if (v.v_cols) + return -EINVAL; + v.v_cols = cols; + } + } + + if (v.v_clin > 32) + return -EINVAL; + + for (i = 0; i < MAX_NR_CONSOLES; i++) { + struct vc_data *vcp; + + if (!vc_cons[i].d) + continue; + console_lock(); + vcp = vc_cons[i].d; + if (vcp) { + int ret; + int save_scan_lines = vcp->vc_scan_lines; + int save_font_height = vcp->vc_font.height; + + if (v.v_vlin) + vcp->vc_scan_lines = v.v_vlin; + if (v.v_clin) + vcp->vc_font.height = v.v_clin; + vcp->vc_resize_user = 1; + ret = vc_resize(vcp, v.v_cols, v.v_rows); + if (ret) { + vcp->vc_scan_lines = save_scan_lines; + vcp->vc_font.height = save_font_height; + console_unlock(); + return ret; + } + } + console_unlock(); } + return 0; +} + +/* + * We handle the console-specific ioctl's here. We allow the + * capability to modify any console, not just the fg_console. + */ +int vt_ioctl(struct tty_struct *tty, + unsigned int cmd, unsigned long arg) +{ + struct vc_data *vc = tty->driver_data; + void __user *up = (void __user *)arg; + int i, perm; + int ret; + + /* + * To have permissions to do most of the vt ioctls, we either have + * to be the owner of the tty, or have CAP_SYS_TTY_CONFIG. + */ + perm = 0; + if (current->signal->tty == tty || capable(CAP_SYS_TTY_CONFIG)) + perm = 1; + + ret = vt_k_ioctl(tty, cmd, arg, perm); + if (ret != -ENOIOCTLCMD) + return ret; + + ret = vt_io_ioctl(vc, cmd, up, perm); + if (ret != -ENOIOCTLCMD) + return ret; + + switch (cmd) { + case TIOCLINUX: + return tioclinux(tty, arg); case VT_SETMODE: { struct vt_mode tmp; if (!perm) return -EPERM; - if (copy_from_user(&tmp, up, sizeof(struct vt_mode))) { - ret = -EFAULT; - goto out; - } - if (tmp.mode != VT_AUTO && tmp.mode != VT_PROCESS) { - ret = -EINVAL; - goto out; - } + if (copy_from_user(&tmp, up, sizeof(struct vt_mode))) + return -EFAULT; + if (tmp.mode != VT_AUTO && tmp.mode != VT_PROCESS) + return -EINVAL; + console_lock(); vc->vt_mode = tmp; /* the frsig is ignored, so we set it to 0 */ @@ -635,7 +894,7 @@ int vt_ioctl(struct tty_struct *tty, rc = copy_to_user(up, &tmp, sizeof(struct vt_mode)); if (rc) - ret = -EFAULT; + return -EFAULT; break; } @@ -650,18 +909,16 @@ int vt_ioctl(struct tty_struct *tty, unsigned short state, mask; if (put_user(fg_console + 1, &vtstat->v_active)) - ret = -EFAULT; - else { - state = 1; /* /dev/tty0 is always open */ - console_lock(); /* required by vt_in_use() */ - for (i = 0, mask = 2; i < MAX_NR_CONSOLES && mask; - ++i, mask <<= 1) - if (vt_in_use(i)) - state |= mask; - console_unlock(); - ret = put_user(state, &vtstat->v_state); - } - break; + return -EFAULT; + + state = 1; /* /dev/tty0 is always open */ + console_lock(); /* required by vt_in_use() */ + for (i = 0, mask = 2; i < MAX_NR_CONSOLES && mask; + ++i, mask <<= 1) + if (vt_in_use(i)) + state |= mask; + console_unlock(); + return put_user(state, &vtstat->v_state); } /* @@ -673,8 +930,8 @@ int vt_ioctl(struct tty_struct *tty, if (!vt_in_use(i)) break; console_unlock(); - uival = i < MAX_NR_CONSOLES ? (i+1) : -1; - goto setint; + i = i < MAX_NR_CONSOLES ? (i+1) : -1; + return put_user(i, (int __user *)arg); /* * ioctl(fd, VT_ACTIVATE, num) will cause us to switch to vt # num, @@ -685,58 +942,22 @@ int vt_ioctl(struct tty_struct *tty, if (!perm) return -EPERM; if (arg == 0 || arg > MAX_NR_CONSOLES) - ret = -ENXIO; - else { - arg--; - console_lock(); - ret = vc_allocate(arg); - console_unlock(); - if (ret) - break; - set_console(arg); - } + return -ENXIO; + + arg--; + console_lock(); + ret = vc_allocate(arg); + console_unlock(); + if (ret) + return ret; + set_console(arg); break; case VT_SETACTIVATE: - { - struct vt_setactivate vsa; - if (!perm) return -EPERM; - if (copy_from_user(&vsa, (struct vt_setactivate __user *)arg, - sizeof(struct vt_setactivate))) { - ret = -EFAULT; - goto out; - } - if (vsa.console == 0 || vsa.console > MAX_NR_CONSOLES) - ret = -ENXIO; - else { - vsa.console = array_index_nospec(vsa.console, - MAX_NR_CONSOLES + 1); - vsa.console--; - console_lock(); - ret = vc_allocate(vsa.console); - if (ret == 0) { - struct vc_data *nvc; - /* This is safe providing we don't drop the - console sem between vc_allocate and - finishing referencing nvc */ - nvc = vc_cons[vsa.console].d; - nvc->vt_mode = vsa.mode; - nvc->vt_mode.frsig = 0; - put_pid(nvc->vt_pid); - nvc->vt_pid = get_pid(task_pid(current)); - } - console_unlock(); - if (ret) - break; - /* Commence switch and lock */ - /* Review set_console locks */ - set_console(vsa.console); - } - break; - } + return vt_setactivate(up); /* * wait until the specified VT has been activated @@ -745,10 +966,8 @@ int vt_ioctl(struct tty_struct *tty, if (!perm) return -EPERM; if (arg == 0 || arg > MAX_NR_CONSOLES) - ret = -ENXIO; - else - ret = vt_waitactive(arg); - break; + return -ENXIO; + return vt_waitactive(arg); /* * If a vt is under process control, the kernel will not switch to it @@ -765,258 +984,56 @@ int vt_ioctl(struct tty_struct *tty, return -EPERM; console_lock(); - if (vc->vt_mode.mode != VT_PROCESS) { - console_unlock(); - ret = -EINVAL; - break; - } - /* - * Switching-from response - */ - if (vc->vt_newvt >= 0) { - if (arg == 0) - /* - * Switch disallowed, so forget we were trying - * to do it. - */ - vc->vt_newvt = -1; - - else { - /* - * The current vt has been released, so - * complete the switch. - */ - int newvt; - newvt = vc->vt_newvt; - vc->vt_newvt = -1; - ret = vc_allocate(newvt); - if (ret) { - console_unlock(); - break; - } - /* - * When we actually do the console switch, - * make sure we are atomic with respect to - * other console switches.. - */ - complete_change_console(vc_cons[newvt].d); - } - } else { - /* - * Switched-to response - */ - /* - * If it's just an ACK, ignore it - */ - if (arg != VT_ACKACQ) - ret = -EINVAL; - } + ret = vt_reldisp(vc, arg); console_unlock(); - break; + + return ret; + /* * Disallocate memory associated to VT (but leave VT1) */ case VT_DISALLOCATE: - if (arg > MAX_NR_CONSOLES) { - ret = -ENXIO; - break; - } + if (arg > MAX_NR_CONSOLES) + return -ENXIO; + if (arg == 0) vt_disallocate_all(); else - ret = vt_disallocate(--arg); + return vt_disallocate(--arg); break; case VT_RESIZE: { struct vt_sizes __user *vtsizes = up; struct vc_data *vc; - ushort ll,cc; + if (!perm) return -EPERM; if (get_user(ll, &vtsizes->v_rows) || get_user(cc, &vtsizes->v_cols)) - ret = -EFAULT; - else { - console_lock(); - for (i = 0; i < MAX_NR_CONSOLES; i++) { - vc = vc_cons[i].d; - - if (vc) { - vc->vc_resize_user = 1; - /* FIXME: review v tty lock */ - vc_resize(vc_cons[i].d, cc, ll); - } - } - console_unlock(); - } - break; - } - - case VT_RESIZEX: - { - struct vt_consize v; - if (!perm) - return -EPERM; - if (copy_from_user(&v, up, sizeof(struct vt_consize))) return -EFAULT; - /* FIXME: Should check the copies properly */ - if (!v.v_vlin) - v.v_vlin = vc->vc_scan_lines; - if (v.v_clin) { - int rows = v.v_vlin/v.v_clin; - if (v.v_rows != rows) { - if (v.v_rows) /* Parameters don't add up */ - return -EINVAL; - v.v_rows = rows; - } - } - if (v.v_vcol && v.v_ccol) { - int cols = v.v_vcol/v.v_ccol; - if (v.v_cols != cols) { - if (v.v_cols) - return -EINVAL; - v.v_cols = cols; - } - } - - if (v.v_clin > 32) - return -EINVAL; + console_lock(); for (i = 0; i < MAX_NR_CONSOLES; i++) { - struct vc_data *vcp; - - if (!vc_cons[i].d) - continue; - console_lock(); - vcp = vc_cons[i].d; - if (vcp) { - if (v.v_vlin) - vcp->vc_scan_lines = v.v_vlin; - if (v.v_clin) - vcp->vc_font.height = v.v_clin; - vcp->vc_resize_user = 1; - vc_resize(vcp, v.v_cols, v.v_rows); + vc = vc_cons[i].d; + + if (vc) { + vc->vc_resize_user = 1; + /* FIXME: review v tty lock */ + vc_resize(vc_cons[i].d, cc, ll); } - console_unlock(); } - break; - } - - case PIO_FONT: { - if (!perm) - return -EPERM; - op.op = KD_FONT_OP_SET; - op.flags = KD_FONT_FLAG_OLD | KD_FONT_FLAG_DONT_RECALC; /* Compatibility */ - op.width = 8; - op.height = 0; - op.charcount = 256; - op.data = up; - ret = con_font_op(vc_cons[fg_console].d, &op); - break; - } - - case GIO_FONT: { - op.op = KD_FONT_OP_GET; - op.flags = KD_FONT_FLAG_OLD; - op.width = 8; - op.height = 32; - op.charcount = 256; - op.data = up; - ret = con_font_op(vc_cons[fg_console].d, &op); - break; - } - - case PIO_CMAP: - if (!perm) - ret = -EPERM; - else - ret = con_set_cmap(up); - break; - - case GIO_CMAP: - ret = con_get_cmap(up); - break; - - case PIO_FONTX: - case GIO_FONTX: - ret = do_fontx_ioctl(cmd, up, perm, &op); - break; - - case PIO_FONTRESET: - { - if (!perm) - return -EPERM; - -#ifdef BROKEN_GRAPHICS_PROGRAMS - /* With BROKEN_GRAPHICS_PROGRAMS defined, the default - font is not saved. */ - ret = -ENOSYS; - break; -#else - { - op.op = KD_FONT_OP_SET_DEFAULT; - op.data = NULL; - ret = con_font_op(vc_cons[fg_console].d, &op); - if (ret) - break; - console_lock(); - con_set_default_unimap(vc_cons[fg_console].d); console_unlock(); break; - } -#endif } - case KDFONTOP: { - if (copy_from_user(&op, up, sizeof(op))) { - ret = -EFAULT; - break; - } - if (!perm && op.op != KD_FONT_OP_GET) - return -EPERM; - ret = con_font_op(vc, &op); - if (ret) - break; - if (copy_to_user(up, &op, sizeof(op))) - ret = -EFAULT; - break; - } - - case PIO_SCRNMAP: - if (!perm) - ret = -EPERM; - else - ret = con_set_trans_old(up); - break; - - case GIO_SCRNMAP: - ret = con_get_trans_old(up); - break; - - case PIO_UNISCRNMAP: - if (!perm) - ret = -EPERM; - else - ret = con_set_trans_new(up); - break; - - case GIO_UNISCRNMAP: - ret = con_get_trans_new(up); - break; - - case PIO_UNIMAPCLR: + case VT_RESIZEX: if (!perm) return -EPERM; - con_clear_unimap(vc); - break; - case PIO_UNIMAP: - case GIO_UNIMAP: - ret = do_unimap_ioctl(cmd, up, perm, vc); - break; + return vt_resizex(vc, up); case VT_LOCKSWITCH: if (!capable(CAP_SYS_TTY_CONFIG)) @@ -1029,17 +1046,15 @@ int vt_ioctl(struct tty_struct *tty, vt_dont_switch = false; break; case VT_GETHIFONTMASK: - ret = put_user(vc->vc_hi_font_mask, + return put_user(vc->vc_hi_font_mask, (unsigned short __user *)arg); - break; case VT_WAITEVENT: - ret = vt_event_wait_ioctl((struct vt_event __user *)arg); - break; + return vt_event_wait_ioctl((struct vt_event __user *)arg); default: - ret = -ENOIOCTLCMD; + return -ENOIOCTLCMD; } -out: - return ret; + + return 0; } void reset_vc(struct vc_data *vc) |