static loff_t lookup_cpt_object_pos(int type, void *p, struct cpt_context *ctx)
{
cpt_object_t *obj;
obj = lookup_cpt_object(type, p, ctx);
return obj->o_pos;
}
int cpt_dump_content_tty(struct file *file, struct cpt_context *ctx)
{
struct tty_struct *tty = file->private_data;
cpt_object_t *obj;
struct cpt_obj_ref o;
loff_t saved_pos;
obj = lookup_cpt_object(CPT_OBJ_TTY, tty, ctx);
if (!obj)
return -EINVAL;
cpt_push_object(&saved_pos, ctx);
o.cpt_next = sizeof(o);
o.cpt_object = CPT_OBJ_REF;
o.cpt_hdrlen = sizeof(o);
o.cpt_content = CPT_CONTENT_VOID;
o.cpt_pos = obj->o_pos;
ctx->write(&o, sizeof(o), ctx);
cpt_pop_object(&saved_pos, ctx);
return 0;
}
struct file * rst_open_tty(cpt_object_t *mntobj, char *name,
struct cpt_file_image *fi, struct cpt_inode_image *ii,
unsigned flags, struct cpt_context *ctx)
{
int err;
cpt_object_t *obj;
struct file *master, *slave;
struct tty_struct *stty;
struct cpt_tty_image *pi;
static char *a = "pqrstuvwxyzabcde";
static char *b = "0123456789abcdef";
char pairname[16];
unsigned master_flags, slave_flags;
if (fi->cpt_priv == CPT_NULL)
return ERR_PTR(-EINVAL);
obj = lookup_cpt_obj_bypos(CPT_OBJ_TTY, fi->cpt_priv, ctx);
if (obj && obj->o_parent) {
dprintk_ctx("obtained pty as pair to existing\n");
master = obj->o_parent;
stty = file_tty(master);
if (stty->driver->subtype == PTY_TYPE_MASTER &&
(stty->driver->flags&TTY_DRIVER_DEVPTS_MEM)) {
wprintk_ctx("cloning ptmx\n");
get_file(master);
return master;
}
master = dentry_open(dget(master->f_dentry),
mntget(master->f_vfsmnt), flags,
current_cred());
if (!IS_ERR(master)) {
stty = file_tty(master);
if (stty->driver->subtype != PTY_TYPE_MASTER)
fixup_tty_attrs(ii, master, ctx);
}
return master;
}
pi = cpt_get_buf(ctx);
err = rst_get_object(CPT_OBJ_TTY, fi->cpt_priv, pi, ctx);
if (err) {
cpt_release_buf(ctx);
return ERR_PTR(err);
}
if (MAJOR(ii->cpt_rdev) == TTY_MAJOR ||
ii->cpt_rdev == MKDEV(TTYAUX_MAJOR, 1)) {
if (mntobj && (mntobj->o_flags & CPT_VFSMOUNT_DELAYFS))
return ERR_PTR(-ENOTSUPP);
master = rst_open_file(mntobj, name, fi,
flags|O_NONBLOCK|O_NOCTTY, ctx);
if (IS_ERR(master)) {
eprintk_ctx("rst_open_tty: %s %Ld %ld\n",
name, (long long)fi->cpt_priv,
PTR_ERR(master));
return master;
}
stty = file_tty(master);
obj = cpt_object_add(CPT_OBJ_TTY, stty, ctx);
obj->o_parent = master;
cpt_obj_setpos(obj, fi->cpt_priv, ctx);
obj = cpt_object_add(CPT_OBJ_FILE, master, ctx);
cpt_obj_setpos(obj, CPT_NULL, ctx);
get_file(master);
/* Do not restore /dev/ttyX state */
cpt_release_buf(ctx);
return master;
}
master_flags = slave_flags = 0;
if (pi->cpt_drv_subtype == PTY_TYPE_MASTER)
master_flags = flags;
else
slave_flags = flags;
/*
* Open pair master/slave.
*/
if (pi->cpt_drv_flags&TTY_DRIVER_DEVPTS_MEM) {
master = ptmx_open(pi->cpt_index, master_flags);
} else {
sprintf(pairname, "/dev/pty%c%c", a[pi->cpt_index/16], b[pi->cpt_index%16]);
master = filp_open(pairname, master_flags|O_NONBLOCK|O_NOCTTY|O_RDWR, 0);
}
if (IS_ERR(master)) {
eprintk_ctx("filp_open master: %Ld %ld\n", (long long)fi->cpt_priv, PTR_ERR(master));
cpt_release_buf(ctx);
return master;
}
stty = file_tty(master);
clear_bit(TTY_PTY_LOCK, &stty->flags);
if (pi->cpt_drv_flags&TTY_DRIVER_DEVPTS_MEM)
sprintf(pairname, "/dev/pts/%d", stty->index);
else
sprintf(pairname, "/dev/tty%c%c", a[stty->index/16], b[stty->index%16]);
slave = filp_open(pairname, slave_flags|O_NONBLOCK|O_NOCTTY|O_RDWR, 0);
if (IS_ERR(slave)) {
eprintk_ctx("filp_open slave %s: %ld\n", pairname, PTR_ERR(slave));
fput(master);
cpt_release_buf(ctx);
return slave;
}
if (pi->cpt_drv_subtype != PTY_TYPE_MASTER)
fixup_tty_attrs(ii, slave, ctx);
cpt_object_add(CPT_OBJ_TTY, file_tty(master), ctx);
cpt_object_add(CPT_OBJ_TTY, file_tty(slave), ctx);
cpt_object_add(CPT_OBJ_FILE, master, ctx);
cpt_object_add(CPT_OBJ_FILE, slave, ctx);
if (pi->cpt_drv_subtype == PTY_TYPE_MASTER) {
loff_t pos;
obj = lookup_cpt_object(CPT_OBJ_TTY, file_tty(master), ctx);
obj->o_parent = master;
cpt_obj_setpos(obj, fi->cpt_priv, ctx);
pty_setup(stty, fi->cpt_priv, pi, ctx);
obj = lookup_cpt_object(CPT_OBJ_TTY, file_tty(slave), ctx);
obj->o_parent = slave;
pos = find_pty_pair(stty->link, fi->cpt_priv, pi, ctx);
cpt_obj_setpos(obj, pos, ctx);
obj = lookup_cpt_object(CPT_OBJ_FILE, slave, ctx);
cpt_obj_setpos(obj, CPT_NULL, ctx);
get_file(master);
cpt_release_buf(ctx);
return master;
} else {
loff_t pos;
obj = lookup_cpt_object(CPT_OBJ_TTY, file_tty(slave), ctx);
obj->o_parent = slave;
cpt_obj_setpos(obj, fi->cpt_priv, ctx);
pty_setup(stty->link, fi->cpt_priv, pi, ctx);
obj = lookup_cpt_object(CPT_OBJ_TTY, file_tty(master), ctx);
obj->o_parent = master;
pos = find_pty_pair(stty, fi->cpt_priv, pi, ctx);
cpt_obj_setpos(obj, pos, ctx);
obj = lookup_cpt_object(CPT_OBJ_FILE, master, ctx);
cpt_obj_setpos(obj, CPT_NULL, ctx);
get_file(slave);
cpt_release_buf(ctx);
return slave;
}
}
int cpt_dump_tty(cpt_object_t *obj, struct cpt_context *ctx)
{
struct tty_struct *tty = obj->o_obj;
struct cpt_tty_image *v;
if (tty->link) {
if (lookup_cpt_object(CPT_OBJ_TTY, tty->link, ctx) == NULL) {
eprintk_ctx("orphan pty %s %d\n", tty->name, tty->driver->subtype == PTY_TYPE_SLAVE);
return -EINVAL;
}
if (tty->link->link != tty) {
eprintk_ctx("bad pty pair\n");
return -EINVAL;
}
if (tty->driver->type == TTY_DRIVER_TYPE_PTY &&
tty->driver->subtype == PTY_TYPE_SLAVE &&
tty->link->count)
obj->o_count++;
}
if (obj->o_count != tty->count) {
eprintk_ctx("tty %s is referenced outside %d %d\n", tty->name, obj->o_count, tty->count);
return -EBUSY;
}
cpt_open_object(obj, ctx);
v = cpt_get_buf(ctx);
v->cpt_next = -1;
v->cpt_object = CPT_OBJ_TTY;
v->cpt_hdrlen = sizeof(*v);
v->cpt_content = CPT_CONTENT_ARRAY;
v->cpt_index = tty->index;
v->cpt_link = -1;
if (tty->link)
v->cpt_link = tty->link->index;
v->cpt_drv_type = tty->driver->type;
v->cpt_drv_subtype = tty->driver->subtype;
v->cpt_drv_flags = tty->driver->flags;
v->cpt_packet = tty->packet;
v->cpt_stopped = tty->stopped;
v->cpt_hw_stopped = tty->hw_stopped;
v->cpt_flow_stopped = tty->flow_stopped;
v->cpt_flags = tty->flags;
v->cpt_ctrl_status = tty->ctrl_status;
v->cpt_canon_data = tty->canon_data;
v->cpt_canon_head = tty->canon_head - tty->read_tail;
v->cpt_canon_column = tty->canon_column;
v->cpt_column = tty->column;
v->cpt_erasing = tty->erasing;
v->cpt_lnext = tty->lnext;
v->cpt_icanon = tty->icanon;
v->cpt_raw = tty->raw;
v->cpt_real_raw = tty->real_raw;
v->cpt_closing = tty->closing;
v->cpt_minimum_to_wake = tty->minimum_to_wake;
v->cpt_pgrp = 0;
if (tty->pgrp) {
v->cpt_pgrp = pid_vnr(tty->pgrp);
if ((int)v->cpt_pgrp < 0) {
dprintk_ctx("cannot map tty->pgrp %d -> %d\n", pid_vnr(tty->pgrp), (int)v->cpt_pgrp);
v->cpt_pgrp = -1;
}
}
v->cpt_session = 0;
if (tty->session) {
v->cpt_session = pid_vnr(tty->session);
if ((int)v->cpt_session < 0) {
eprintk_ctx("cannot map tty->session %d -> %d\n", pid_nr(tty->session), (int)v->cpt_session);
cpt_release_buf(ctx);
return -EINVAL;
}
}
memcpy(v->cpt_name, tty->name, 64);
v->cpt_ws_row = tty->winsize.ws_row;
v->cpt_ws_col = tty->winsize.ws_col;
v->cpt_ws_prow = tty->winsize.ws_ypixel;
v->cpt_ws_pcol = tty->winsize.ws_xpixel;
if (tty->termios == NULL) {
eprintk_ctx("NULL termios");
cpt_release_buf(ctx);
return -EINVAL;
}
v->cpt_c_line = tty->termios->c_line;
v->cpt_c_iflag = tty->termios->c_iflag;
v->cpt_c_oflag = tty->termios->c_oflag;
v->cpt_c_cflag = tty->termios->c_cflag;
v->cpt_c_lflag = tty->termios->c_lflag;
memcpy(v->cpt_c_cc, tty->termios->c_cc, NCCS);
if (NCCS < 32)
memset(v->cpt_c_cc + NCCS, 255, 32 - NCCS);
memcpy(v->cpt_read_flags, tty->read_flags, sizeof(v->cpt_read_flags));
ctx->write(v, sizeof(*v), ctx);
cpt_release_buf(ctx);
if (tty->read_buf && tty->read_cnt) {
struct cpt_obj_bits *v = cpt_get_buf(ctx);
loff_t saved_pos;
cpt_push_object(&saved_pos, ctx);
cpt_open_object(NULL, ctx);
v->cpt_next = CPT_NULL;
v->cpt_object = CPT_OBJ_BITS;
v->cpt_hdrlen = sizeof(*v);
v->cpt_content = CPT_CONTENT_DATA;
v->cpt_size = tty->read_cnt;
ctx->write(v, sizeof(*v), ctx);
cpt_release_buf(ctx);
if (tty->read_cnt) {
int n = min(tty->read_cnt, N_TTY_BUF_SIZE - tty->read_tail);
ctx->write(tty->read_buf + tty->read_tail, n, ctx);
if (tty->read_cnt > n)
ctx->write(tty->read_buf, tty->read_cnt-n, ctx);
ctx->align(ctx);
}
cpt_close_object(ctx);
cpt_pop_object(&saved_pos, ctx);
}
cpt_close_object(ctx);
return 0;
}
