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; }