src/udev/udev-builtin-path_id.c

	udev-builtin-path_id.c revision e98bbfd2074e2b1079b7059341eac25741baf319
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering/*
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering * compose persistent device path
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering *
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering * Copyright (C) 2009-2011 Kay Sievers <kay@vrfy.org>
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering *
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering * Logic based on Hannes Reinecke's shell script.
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering *
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering * This program is free software: you can redistribute it and/or modify
5430f7f2bc7330f3088b894166bf3524a067e3d8Lennart Poettering * it under the terms of the GNU General Public License as published by
5430f7f2bc7330f3088b894166bf3524a067e3d8Lennart Poettering * the Free Software Foundation, either version 2 of the License, or
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering * (at your option) any later version.
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering *
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering * This program is distributed in the hope that it will be useful,
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering * but WITHOUT ANY WARRANTY; without even the implied warranty of
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
5430f7f2bc7330f3088b894166bf3524a067e3d8Lennart Poettering * GNU General Public License for more details.
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering *
5430f7f2bc7330f3088b894166bf3524a067e3d8Lennart Poettering * You should have received a copy of the GNU General Public License
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering * along with this program.  If not, see <http://www.gnu.org/licenses/>.
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering */
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering#include <stdio.h>
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering#include <stdlib.h>
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering#include <stdarg.h>
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering#include <unistd.h>
0dad12c190b7493955cd60d2a1625199b1709f69Lennart Poettering#include <string.h>
0dad12c190b7493955cd60d2a1625199b1709f69Lennart Poettering#include <ctype.h>
72f1d5a2880d103dc1c1746f5c02e192e054705eLennart Poettering#include <fcntl.h>
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering#include <errno.h>
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering#include <dirent.h>
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering#include <getopt.h>
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering#include "udev.h"
fe6521272ba203ec8f0d5a94f0729960b3f90525Lennart Poettering
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering_printf_(2,3)
bb99a35a873c35e80b0b47fe045081022660374dLennart Poetteringstatic int path_prepend(char **path, const char *fmt, ...) {
bb99a35a873c35e80b0b47fe045081022660374dLennart Poettering        va_list va;
3ed08c446cfaaae2b234fdfeb0c34ab6b4748c3eLennart Poettering        char *pre;
3ed08c446cfaaae2b234fdfeb0c34ab6b4748c3eLennart Poettering        int err = 0;
3ed08c446cfaaae2b234fdfeb0c34ab6b4748c3eLennart Poettering
3ed08c446cfaaae2b234fdfeb0c34ab6b4748c3eLennart Poettering        va_start(va, fmt);
3ed08c446cfaaae2b234fdfeb0c34ab6b4748c3eLennart Poettering        err = vasprintf(&pre, fmt, va);
3ed08c446cfaaae2b234fdfeb0c34ab6b4748c3eLennart Poettering        va_end(va);
3ed08c446cfaaae2b234fdfeb0c34ab6b4748c3eLennart Poettering        if (err < 0)
3ed08c446cfaaae2b234fdfeb0c34ab6b4748c3eLennart Poettering                goto out;
3ed08c446cfaaae2b234fdfeb0c34ab6b4748c3eLennart Poettering
3ed08c446cfaaae2b234fdfeb0c34ab6b4748c3eLennart Poettering        if (*path != NULL) {
3ed08c446cfaaae2b234fdfeb0c34ab6b4748c3eLennart Poettering                char *new;
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering                err = asprintf(&new, "%s-%s", pre, *path);
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering                free(pre);
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering                if (err < 0)
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering                        goto out;
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering                free(*path);
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering                *path = new;
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering        } else {
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering                *path = pre;
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering        }
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poetteringout:
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering        return err;
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering}
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering/*
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering** Linux only supports 32 bit luns.
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering** See drivers/scsi/scsi_scan.c::scsilun_to_int() for more details.
bb99a35a873c35e80b0b47fe045081022660374dLennart Poettering*/
bb99a35a873c35e80b0b47fe045081022660374dLennart Poetteringstatic int format_lun_number(struct udev_device *dev, char **path) {
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering        unsigned long lun = strtoul(udev_device_get_sysnum(dev), NULL, 10);
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering        /* address method 0, peripheral device addressing with bus id of zero */
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering        if (lun < 256)
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering                return path_prepend(path, "lun-%lu", lun);
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering        /* handle all other lun addressing methods by using a variant of the original lun format */
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering        return path_prepend(path, "lun-0x%04lx%04lx00000000", lun & 0xffff, (lun >> 16) & 0xffff);
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering}
a5344d2c3b0f14e954ce1c0ef905c5b44bc5bf0aLennart Poettering
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poetteringstatic struct udev_device *skip_subsystem(struct udev_device *dev, const char *subsys) {
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering        struct udev_device *parent = dev;
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering        while (parent != NULL) {
d0bbc21caa6e68693a47db60c93e99422bf2a858Lennart Poettering                const char *subsystem;
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering                subsystem = udev_device_get_subsystem(parent);
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering                if (subsystem == NULL || !streq(subsystem, subsys))
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering                        break;
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering                dev = parent;
a5344d2c3b0f14e954ce1c0ef905c5b44bc5bf0aLennart Poettering                parent = udev_device_get_parent(parent);
18c7ed186be28800a2eeb37ad31c9c44480d3d9cLennart Poettering        }
18c7ed186be28800a2eeb37ad31c9c44480d3d9cLennart Poettering        return dev;
18c7ed186be28800a2eeb37ad31c9c44480d3d9cLennart Poettering}
18c7ed186be28800a2eeb37ad31c9c44480d3d9cLennart Poettering
18c7ed186be28800a2eeb37ad31c9c44480d3d9cLennart Poetteringstatic struct udev_device *handle_scsi_fibre_channel(struct udev_device *parent, char **path) {
d0bbc21caa6e68693a47db60c93e99422bf2a858Lennart Poettering        struct udev *udev  = udev_device_get_udev(parent);
fe6521272ba203ec8f0d5a94f0729960b3f90525Lennart Poettering        struct udev_device *targetdev;
fe6521272ba203ec8f0d5a94f0729960b3f90525Lennart Poettering        struct udev_device *fcdev = NULL;
fe6521272ba203ec8f0d5a94f0729960b3f90525Lennart Poettering        const char *port;
fe6521272ba203ec8f0d5a94f0729960b3f90525Lennart Poettering        char *lun = NULL;
fe6521272ba203ec8f0d5a94f0729960b3f90525Lennart Poettering
fe6521272ba203ec8f0d5a94f0729960b3f90525Lennart Poettering        targetdev = udev_device_get_parent_with_subsystem_devtype(parent, "scsi", "scsi_target");
d0bbc21caa6e68693a47db60c93e99422bf2a858Lennart Poettering        if (targetdev == NULL)
d0bbc21caa6e68693a47db60c93e99422bf2a858Lennart Poettering                return NULL;
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering        fcdev = udev_device_new_from_subsystem_sysname(udev, "fc_transport", udev_device_get_sysname(targetdev));
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering        if (fcdev == NULL)
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering                return NULL;
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering        port = udev_device_get_sysattr_value(fcdev, "port_name");
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering        if (port == NULL) {
d0bbc21caa6e68693a47db60c93e99422bf2a858Lennart Poettering                parent = NULL;
d0bbc21caa6e68693a47db60c93e99422bf2a858Lennart Poettering                goto out;
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering        }
d0bbc21caa6e68693a47db60c93e99422bf2a858Lennart Poettering
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering        format_lun_number(parent, &lun);
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering        path_prepend(path, "fc-%s-%s", port, lun);
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering        if (lun)
25d042e81516246b1ebf706a57c47ac19abb0b8aLennart Poettering                free(lun);
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poetteringout:
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering        udev_device_unref(fcdev);
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering        return parent;
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering}
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poetteringstatic struct udev_device *handle_scsi_sas(struct udev_device *parent, char **path) {
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering        struct udev *udev  = udev_device_get_udev(parent);
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering        struct udev_device *targetdev;
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering        struct udev_device *target_parent;
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering        struct udev_device *sasdev;
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering        const char *sas_address;
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering        char *lun = NULL;
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering        targetdev = udev_device_get_parent_with_subsystem_devtype(parent, "scsi", "scsi_target");
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering        if (targetdev == NULL)
25d042e81516246b1ebf706a57c47ac19abb0b8aLennart Poettering                return NULL;
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering        target_parent = udev_device_get_parent(targetdev);
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering        if (target_parent == NULL)
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering                return NULL;
72f1d5a2880d103dc1c1746f5c02e192e054705eLennart Poettering
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering        sasdev = udev_device_new_from_subsystem_sysname(udev, "sas_device",
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering                                udev_device_get_sysname(target_parent));
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering        if (sasdev == NULL)
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering                return NULL;
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering        sas_address = udev_device_get_sysattr_value(sasdev, "sas_address");
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering        if (sas_address == NULL) {
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering                parent = NULL;
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering                goto out;
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering        }
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering        format_lun_number(parent, &lun);
72f1d5a2880d103dc1c1746f5c02e192e054705eLennart Poettering        path_prepend(path, "sas-%s-%s", sas_address, lun);
72f1d5a2880d103dc1c1746f5c02e192e054705eLennart Poettering        if (lun)
72f1d5a2880d103dc1c1746f5c02e192e054705eLennart Poettering                free(lun);
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poetteringout:
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering        udev_device_unref(sasdev);
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering        return parent;
72f1d5a2880d103dc1c1746f5c02e192e054705eLennart Poettering}
72f1d5a2880d103dc1c1746f5c02e192e054705eLennart Poettering
72f1d5a2880d103dc1c1746f5c02e192e054705eLennart Poetteringstatic struct udev_device *handle_scsi_iscsi(struct udev_device *parent, char **path) {
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering        struct udev *udev  = udev_device_get_udev(parent);
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering        struct udev_device *transportdev;
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering        struct udev_device *sessiondev = NULL;
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering        const char *target;
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering        char *connname;
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering        struct udev_device *conndev = NULL;
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering        const char *addr;
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering        const char *port;
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering        char *lun = NULL;
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering        /* find iscsi session */
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering        transportdev = parent;
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering        for (;;) {
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering                transportdev = udev_device_get_parent(transportdev);
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering                if (transportdev == NULL)
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering                        return NULL;
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering                if (startswith(udev_device_get_sysname(transportdev), "session"))
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering                        break;
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering        }
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering        /* find iscsi session device */
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering        sessiondev = udev_device_new_from_subsystem_sysname(udev, "iscsi_session", udev_device_get_sysname(transportdev));
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering        if (sessiondev == NULL)
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering                return NULL;
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering        target = udev_device_get_sysattr_value(sessiondev, "targetname");
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering        if (target == NULL) {
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering                parent = NULL;
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering                goto out;
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering        }
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering        if (asprintf(&connname, "connection%s:0", udev_device_get_sysnum(transportdev)) < 0) {
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering                parent = NULL;
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering                goto out;
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering        }
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering        conndev = udev_device_new_from_subsystem_sysname(udev, "iscsi_connection", connname);
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering        free(connname);
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering        if (conndev == NULL) {
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering                parent = NULL;
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering                goto out;
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering        }
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering        addr = udev_device_get_sysattr_value(conndev, "persistent_address");
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering        port = udev_device_get_sysattr_value(conndev, "persistent_port");
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering        if (addr == NULL || port == NULL) {
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering                parent = NULL;
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering                goto out;
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering        }
a5344d2c3b0f14e954ce1c0ef905c5b44bc5bf0aLennart Poettering
0dad12c190b7493955cd60d2a1625199b1709f69Lennart Poettering        format_lun_number(parent, &lun);
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering        path_prepend(path, "ip-%s:%s-iscsi-%s-%s", addr, port, target, lun);
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering        if (lun)
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering                free(lun);
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poetteringout:
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering        udev_device_unref(sessiondev);
0dad12c190b7493955cd60d2a1625199b1709f69Lennart Poettering        udev_device_unref(conndev);
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering        return parent;
0dad12c190b7493955cd60d2a1625199b1709f69Lennart Poettering}
0dad12c190b7493955cd60d2a1625199b1709f69Lennart Poettering
0dad12c190b7493955cd60d2a1625199b1709f69Lennart Poetteringstatic struct udev_device *handle_scsi_default(struct udev_device *parent, char **path) {
0dad12c190b7493955cd60d2a1625199b1709f69Lennart Poettering        struct udev_device *hostdev;
0dad12c190b7493955cd60d2a1625199b1709f69Lennart Poettering        int host, bus, target, lun;
9058851be7821edac08c1fa7ecafe5cba9ab9022Lennart Poettering        const char *name;
9058851be7821edac08c1fa7ecafe5cba9ab9022Lennart Poettering        char *base;
9058851be7821edac08c1fa7ecafe5cba9ab9022Lennart Poettering        char *pos;
9058851be7821edac08c1fa7ecafe5cba9ab9022Lennart Poettering        DIR *dir;
ee55db41442ad8055f5a84a339b1e0e22bc037c4Lennart Poettering        struct dirent *dent;
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering        int basenum;
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering        hostdev = udev_device_get_parent_with_subsystem_devtype(parent, "scsi", "scsi_host");
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering        if (hostdev == NULL)
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering                return NULL;
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering        name = udev_device_get_sysname(parent);
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering        if (sscanf(name, "%d:%d:%d:%d", &host, &bus, &target, &lun) != 4)
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering                return NULL;
ee55db41442ad8055f5a84a339b1e0e22bc037c4Lennart Poettering
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering        /*
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering         * Rebase host offset to get the local relative number
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering         *
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering         * Note: This is by definition racy, unreliable and too simple.
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering         * Please do not copy this model anywhere. It's just a left-over
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering         * from the time we had no idea how things should look like in
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering         * the end.
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering         *
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering         * Making assumptions about a global in-kernel counter and use
a5344d2c3b0f14e954ce1c0ef905c5b44bc5bf0aLennart Poettering         * that to calculate a local offset is a very broken concept. It
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering         * can only work as long as things are in strict order.
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering         *
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering         * The kernel needs to export the instance/port number of a
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering         * controller directly, without the need for rebase magic like
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering         * this. Manual driver unbind/bind, parallel hotplug/unplug will
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering         * get into the way of this "I hope it works" logic.
29abad107f8610e73b2fc091216040b579c75453Zbigniew Jędrzejewski-Szmek         */
29abad107f8610e73b2fc091216040b579c75453Zbigniew Jędrzejewski-Szmek        basenum = -1;
29abad107f8610e73b2fc091216040b579c75453Zbigniew Jędrzejewski-Szmek        base = strdup(udev_device_get_syspath(hostdev));
ee55db41442ad8055f5a84a339b1e0e22bc037c4Lennart Poettering        if (base == NULL)
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering                return NULL;
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering        pos = strrchr(base, '/');
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering        if (pos == NULL) {
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering                parent = NULL;
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering                goto out;
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering        }
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering        pos[0] = '\0';
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering        dir = opendir(base);
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering        if (dir == NULL) {
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering                parent = NULL;
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering                goto out;
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering        }
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering        for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering                char *rest;
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering                int i;
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering                if (dent->d_name[0] == '.')
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering                        continue;
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering                if (dent->d_type != DT_DIR && dent->d_type != DT_LNK)
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering                        continue;
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering                if (!startswith(dent->d_name, "host"))
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering                        continue;
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering                i = strtoul(&dent->d_name[4], &rest, 10);
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering                if (rest[0] != '\0')
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering                        continue;
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering                /*
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering                 * find the smallest number; the host really needs to export its
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering                 * own instance number per parent device; relying on the global host
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering                 * enumeration and plainly rebasing the numbers sounds unreliable
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering                 */
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering                if (basenum == -1 || i < basenum)
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering                        basenum = i;
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering        }
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering        closedir(dir);
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering        if (basenum == -1) {
ee55db41442ad8055f5a84a339b1e0e22bc037c4Lennart Poettering                parent = NULL;
ee55db41442ad8055f5a84a339b1e0e22bc037c4Lennart Poettering                goto out;
ee55db41442ad8055f5a84a339b1e0e22bc037c4Lennart Poettering        }
ee55db41442ad8055f5a84a339b1e0e22bc037c4Lennart Poettering        host -= basenum;
ee55db41442ad8055f5a84a339b1e0e22bc037c4Lennart Poettering
ee55db41442ad8055f5a84a339b1e0e22bc037c4Lennart Poettering        path_prepend(path, "scsi-%u:%u:%u:%u", host, bus, target, lun);
ee55db41442ad8055f5a84a339b1e0e22bc037c4Lennart Poetteringout:
ee55db41442ad8055f5a84a339b1e0e22bc037c4Lennart Poettering        free(base);
ee55db41442ad8055f5a84a339b1e0e22bc037c4Lennart Poettering        return hostdev;
ee55db41442ad8055f5a84a339b1e0e22bc037c4Lennart Poettering}
ee55db41442ad8055f5a84a339b1e0e22bc037c4Lennart Poettering
ee55db41442ad8055f5a84a339b1e0e22bc037c4Lennart Poetteringstatic struct udev_device *handle_scsi_hyperv(struct udev_device *parent, char **path) {
ee55db41442ad8055f5a84a339b1e0e22bc037c4Lennart Poettering        struct udev_device *hostdev;
ee55db41442ad8055f5a84a339b1e0e22bc037c4Lennart Poettering        struct udev_device *vmbusdev;
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering        const char *guid_str;
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering        char *lun = NULL;
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering        char guid[38];
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering        size_t i, k;
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering        hostdev = udev_device_get_parent_with_subsystem_devtype(parent, "scsi", "scsi_host");
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering        if (!hostdev)
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering                return NULL;
5ba081b0fb02380cee4c2ff5bc7e05f869eb8415Lennart Poettering
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering        vmbusdev = udev_device_get_parent(hostdev);
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering        if (!vmbusdev)
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering                return NULL;
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering        guid_str = udev_device_get_sysattr_value(vmbusdev, "device_id");
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering        if (!guid_str)
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering                return NULL;
0dad12c190b7493955cd60d2a1625199b1709f69Lennart Poettering
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering        if (strlen(guid_str) < 37 || guid_str[0] != '{' || guid_str[36] != '}')
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering                return NULL;
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering        for (i = 1, k = 0; i < 36; i++) {
0dad12c190b7493955cd60d2a1625199b1709f69Lennart Poettering                if (guid_str[i] == '-')
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering                        continue;
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering                guid[k++] = guid_str[i];
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering        }
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering        guid[k] = '\0';
0dad12c190b7493955cd60d2a1625199b1709f69Lennart Poettering
0dad12c190b7493955cd60d2a1625199b1709f69Lennart Poettering        format_lun_number(parent, &lun);
0dad12c190b7493955cd60d2a1625199b1709f69Lennart Poettering        path_prepend(path, "vmbus-%s-%s", guid, lun);
0dad12c190b7493955cd60d2a1625199b1709f69Lennart Poettering        free(lun);
0dad12c190b7493955cd60d2a1625199b1709f69Lennart Poettering        return parent;
0dad12c190b7493955cd60d2a1625199b1709f69Lennart Poettering}
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poetteringstatic struct udev_device *handle_scsi(struct udev_device *parent, char **path) {
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering        const char *devtype;
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering        const char *name;
0dad12c190b7493955cd60d2a1625199b1709f69Lennart Poettering        const char *id;
0dad12c190b7493955cd60d2a1625199b1709f69Lennart Poettering
0dad12c190b7493955cd60d2a1625199b1709f69Lennart Poettering        devtype = udev_device_get_devtype(parent);
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering        if (devtype == NULL || !streq(devtype, "scsi_device"))
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering                return parent;
0dad12c190b7493955cd60d2a1625199b1709f69Lennart Poettering
0dad12c190b7493955cd60d2a1625199b1709f69Lennart Poettering        /* firewire */
0dad12c190b7493955cd60d2a1625199b1709f69Lennart Poettering        id = udev_device_get_sysattr_value(parent, "ieee1394_id");
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering        if (id != NULL) {
0dad12c190b7493955cd60d2a1625199b1709f69Lennart Poettering                parent = skip_subsystem(parent, "scsi");
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering                path_prepend(path, "ieee1394-0x%s", id);
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering                goto out;
0dad12c190b7493955cd60d2a1625199b1709f69Lennart Poettering        }
0dad12c190b7493955cd60d2a1625199b1709f69Lennart Poettering
0dad12c190b7493955cd60d2a1625199b1709f69Lennart Poettering        /* scsi sysfs does not have a "subsystem" for the transport */
0dad12c190b7493955cd60d2a1625199b1709f69Lennart Poettering        name = udev_device_get_syspath(parent);
0dad12c190b7493955cd60d2a1625199b1709f69Lennart Poettering
0dad12c190b7493955cd60d2a1625199b1709f69Lennart Poettering        if (strstr(name, "/rport-") != NULL) {
0dad12c190b7493955cd60d2a1625199b1709f69Lennart Poettering                parent = handle_scsi_fibre_channel(parent, path);
0dad12c190b7493955cd60d2a1625199b1709f69Lennart Poettering                goto out;
0dad12c190b7493955cd60d2a1625199b1709f69Lennart Poettering        }
0dad12c190b7493955cd60d2a1625199b1709f69Lennart Poettering
0dad12c190b7493955cd60d2a1625199b1709f69Lennart Poettering        if (strstr(name, "/end_device-") != NULL) {
0dad12c190b7493955cd60d2a1625199b1709f69Lennart Poettering                parent = handle_scsi_sas(parent, path);
0dad12c190b7493955cd60d2a1625199b1709f69Lennart Poettering                goto out;
0dad12c190b7493955cd60d2a1625199b1709f69Lennart Poettering        }
0dad12c190b7493955cd60d2a1625199b1709f69Lennart Poettering
0dad12c190b7493955cd60d2a1625199b1709f69Lennart Poettering        if (strstr(name, "/session") != NULL) {
0dad12c190b7493955cd60d2a1625199b1709f69Lennart Poettering                parent = handle_scsi_iscsi(parent, path);
0dad12c190b7493955cd60d2a1625199b1709f69Lennart Poettering                goto out;
0dad12c190b7493955cd60d2a1625199b1709f69Lennart Poettering        }
0dad12c190b7493955cd60d2a1625199b1709f69Lennart Poettering
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering        /*
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering         * We do not support the ATA transport class, it uses global counters
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering         * to name the ata devices which numbers spread across multiple
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering         * controllers.
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering         *
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering         * The real link numbers are not exported. Also, possible chains of ports
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering         * behind port multipliers cannot be composed that way.
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering         *
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering         * Until all that is solved at the kernel level, there are no by-path/
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering         * links for ATA devices.
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering         */
7f3e62571a63ac90de6ac5eefeeb8d3e9aa6f49eLennart Poettering        if (strstr(name, "/ata") != NULL) {
fe6521272ba203ec8f0d5a94f0729960b3f90525Lennart Poettering                parent = NULL;
18c7ed186be28800a2eeb37ad31c9c44480d3d9cLennart Poettering                goto out;
18c7ed186be28800a2eeb37ad31c9c44480d3d9cLennart Poettering        }
18c7ed186be28800a2eeb37ad31c9c44480d3d9cLennart Poettering
18c7ed186be28800a2eeb37ad31c9c44480d3d9cLennart Poettering        if (strstr(name, "/vmbus_") != NULL) {
18c7ed186be28800a2eeb37ad31c9c44480d3d9cLennart Poettering                parent = handle_scsi_hyperv(parent, path);
18c7ed186be28800a2eeb37ad31c9c44480d3d9cLennart Poettering                goto out;
18c7ed186be28800a2eeb37ad31c9c44480d3d9cLennart Poettering        }
18c7ed186be28800a2eeb37ad31c9c44480d3d9cLennart Poettering
18c7ed186be28800a2eeb37ad31c9c44480d3d9cLennart Poettering        parent = handle_scsi_default(parent, path);
18c7ed186be28800a2eeb37ad31c9c44480d3d9cLennart Poetteringout:
18c7ed186be28800a2eeb37ad31c9c44480d3d9cLennart Poettering        return parent;
18c7ed186be28800a2eeb37ad31c9c44480d3d9cLennart Poettering}
18c7ed186be28800a2eeb37ad31c9c44480d3d9cLennart Poettering
18c7ed186be28800a2eeb37ad31c9c44480d3d9cLennart Poetteringstatic struct udev_device *handle_cciss(struct udev_device *parent, char **path) {
18c7ed186be28800a2eeb37ad31c9c44480d3d9cLennart Poettering        const char *str;
18c7ed186be28800a2eeb37ad31c9c44480d3d9cLennart Poettering        unsigned int controller, disk;
18c7ed186be28800a2eeb37ad31c9c44480d3d9cLennart Poettering
18c7ed186be28800a2eeb37ad31c9c44480d3d9cLennart Poettering        str = udev_device_get_sysname(parent);
18c7ed186be28800a2eeb37ad31c9c44480d3d9cLennart Poettering        if (sscanf(str, "c%ud%u%*s", &controller, &disk) != 2)
18c7ed186be28800a2eeb37ad31c9c44480d3d9cLennart Poettering                return NULL;
18c7ed186be28800a2eeb37ad31c9c44480d3d9cLennart Poettering
18c7ed186be28800a2eeb37ad31c9c44480d3d9cLennart Poettering        path_prepend(path, "cciss-disk%u", disk);
18c7ed186be28800a2eeb37ad31c9c44480d3d9cLennart Poettering        parent = skip_subsystem(parent, "cciss");
18c7ed186be28800a2eeb37ad31c9c44480d3d9cLennart Poettering        return parent;
18c7ed186be28800a2eeb37ad31c9c44480d3d9cLennart Poettering}
18c7ed186be28800a2eeb37ad31c9c44480d3d9cLennart Poettering
18c7ed186be28800a2eeb37ad31c9c44480d3d9cLennart Poetteringstatic void handle_scsi_tape(struct udev_device *dev, char **path) {
18c7ed186be28800a2eeb37ad31c9c44480d3d9cLennart Poettering        const char *name;
18c7ed186be28800a2eeb37ad31c9c44480d3d9cLennart Poettering
18c7ed186be28800a2eeb37ad31c9c44480d3d9cLennart Poettering        /* must be the last device in the syspath */
18c7ed186be28800a2eeb37ad31c9c44480d3d9cLennart Poettering        if (*path != NULL)
18c7ed186be28800a2eeb37ad31c9c44480d3d9cLennart Poettering                return;
18c7ed186be28800a2eeb37ad31c9c44480d3d9cLennart Poettering
18c7ed186be28800a2eeb37ad31c9c44480d3d9cLennart Poettering        name = udev_device_get_sysname(dev);
18c7ed186be28800a2eeb37ad31c9c44480d3d9cLennart Poettering        if (startswith(name, "nst") && strchr("lma", name[3]) != NULL)
18c7ed186be28800a2eeb37ad31c9c44480d3d9cLennart Poettering                path_prepend(path, "nst%c", name[3]);
18c7ed186be28800a2eeb37ad31c9c44480d3d9cLennart Poettering        else if (startswith(name, "st") && strchr("lma", name[2]) != NULL)
18c7ed186be28800a2eeb37ad31c9c44480d3d9cLennart Poettering                path_prepend(path, "st%c", name[2]);
18c7ed186be28800a2eeb37ad31c9c44480d3d9cLennart Poettering}
18c7ed186be28800a2eeb37ad31c9c44480d3d9cLennart Poettering
18c7ed186be28800a2eeb37ad31c9c44480d3d9cLennart Poetteringstatic struct udev_device *handle_usb(struct udev_device *parent, char **path) {
18c7ed186be28800a2eeb37ad31c9c44480d3d9cLennart Poettering        const char *devtype;
18c7ed186be28800a2eeb37ad31c9c44480d3d9cLennart Poettering        const char *str;
18c7ed186be28800a2eeb37ad31c9c44480d3d9cLennart Poettering        const char *port;
18c7ed186be28800a2eeb37ad31c9c44480d3d9cLennart Poettering
18c7ed186be28800a2eeb37ad31c9c44480d3d9cLennart Poettering        devtype = udev_device_get_devtype(parent);
18c7ed186be28800a2eeb37ad31c9c44480d3d9cLennart Poettering        if (devtype == NULL)
18c7ed186be28800a2eeb37ad31c9c44480d3d9cLennart Poettering                return parent;
18c7ed186be28800a2eeb37ad31c9c44480d3d9cLennart Poettering        if (!streq(devtype, "usb_interface") && !streq(devtype, "usb_device"))
18c7ed186be28800a2eeb37ad31c9c44480d3d9cLennart Poettering                return parent;
18c7ed186be28800a2eeb37ad31c9c44480d3d9cLennart Poettering
18c7ed186be28800a2eeb37ad31c9c44480d3d9cLennart Poettering        str = udev_device_get_sysname(parent);
18c7ed186be28800a2eeb37ad31c9c44480d3d9cLennart Poettering        port = strchr(str, '-');
18c7ed186be28800a2eeb37ad31c9c44480d3d9cLennart Poettering        if (port == NULL)
18c7ed186be28800a2eeb37ad31c9c44480d3d9cLennart Poettering                return parent;
18c7ed186be28800a2eeb37ad31c9c44480d3d9cLennart Poettering        port++;
18c7ed186be28800a2eeb37ad31c9c44480d3d9cLennart Poettering
4cd9a9d9ecf3a8835e21930f3215a5f5b74144beLennart Poettering        parent = skip_subsystem(parent, "usb");
fe6521272ba203ec8f0d5a94f0729960b3f90525Lennart Poettering        path_prepend(path, "usb-0:%s", port);
fe6521272ba203ec8f0d5a94f0729960b3f90525Lennart Poettering        return parent;
fe6521272ba203ec8f0d5a94f0729960b3f90525Lennart Poettering}
fe6521272ba203ec8f0d5a94f0729960b3f90525Lennart Poettering
fe6521272ba203ec8f0d5a94f0729960b3f90525Lennart Poetteringstatic struct udev_device *handle_bcma(struct udev_device *parent, char **path) {
fe6521272ba203ec8f0d5a94f0729960b3f90525Lennart Poettering        const char *sysname;
fe6521272ba203ec8f0d5a94f0729960b3f90525Lennart Poettering        unsigned int core;
fe6521272ba203ec8f0d5a94f0729960b3f90525Lennart Poettering
fe6521272ba203ec8f0d5a94f0729960b3f90525Lennart Poettering        sysname = udev_device_get_sysname(parent);
fe6521272ba203ec8f0d5a94f0729960b3f90525Lennart Poettering        if (sscanf(sysname, "bcma%*u:%u", &core) != 1)
fe6521272ba203ec8f0d5a94f0729960b3f90525Lennart Poettering                return NULL;
fe6521272ba203ec8f0d5a94f0729960b3f90525Lennart Poettering
fe6521272ba203ec8f0d5a94f0729960b3f90525Lennart Poettering        path_prepend(path, "bcma-%u", core);
fe6521272ba203ec8f0d5a94f0729960b3f90525Lennart Poettering        return parent;
fe6521272ba203ec8f0d5a94f0729960b3f90525Lennart Poettering}
259d2e762041d8d50c2a17bfea90b1a96f6b880bLennart Poettering
fe6521272ba203ec8f0d5a94f0729960b3f90525Lennart Poetteringstatic struct udev_device *handle_ccw(struct udev_device *parent, struct udev_device *dev, char **path) {
fe6521272ba203ec8f0d5a94f0729960b3f90525Lennart Poettering        struct udev_device *scsi_dev;
fe6521272ba203ec8f0d5a94f0729960b3f90525Lennart Poettering
fe6521272ba203ec8f0d5a94f0729960b3f90525Lennart Poettering        scsi_dev = udev_device_get_parent_with_subsystem_devtype(dev, "scsi", "scsi_device");
fe6521272ba203ec8f0d5a94f0729960b3f90525Lennart Poettering        if (scsi_dev != NULL) {
fe6521272ba203ec8f0d5a94f0729960b3f90525Lennart Poettering                const char *wwpn;
fe6521272ba203ec8f0d5a94f0729960b3f90525Lennart Poettering                const char *lun;
86b9b8e70d54e79db3ff4f67bbd5280ecfc82537Lennart Poettering                const char *hba_id;
86b9b8e70d54e79db3ff4f67bbd5280ecfc82537Lennart Poettering
86b9b8e70d54e79db3ff4f67bbd5280ecfc82537Lennart Poettering                hba_id = udev_device_get_sysattr_value(scsi_dev, "hba_id");
86b9b8e70d54e79db3ff4f67bbd5280ecfc82537Lennart Poettering                wwpn = udev_device_get_sysattr_value(scsi_dev, "wwpn");
86b9b8e70d54e79db3ff4f67bbd5280ecfc82537Lennart Poettering                lun = udev_device_get_sysattr_value(scsi_dev, "fcp_lun");
bb99a35a873c35e80b0b47fe045081022660374dLennart Poettering                if (hba_id != NULL && lun != NULL && wwpn != NULL) {
bb99a35a873c35e80b0b47fe045081022660374dLennart Poettering                        path_prepend(path, "ccw-%s-zfcp-%s:%s", hba_id, wwpn, lun);
4cd9a9d9ecf3a8835e21930f3215a5f5b74144beLennart Poettering                        goto out;
4cd9a9d9ecf3a8835e21930f3215a5f5b74144beLennart Poettering                }
fe6521272ba203ec8f0d5a94f0729960b3f90525Lennart Poettering        }
4cd9a9d9ecf3a8835e21930f3215a5f5b74144beLennart Poettering
8b38f3cc3eb73adf9536cb73d0f319e60d42ea0cLennart Poettering        path_prepend(path, "ccw-%s", udev_device_get_sysname(parent));
fe6521272ba203ec8f0d5a94f0729960b3f90525Lennart Poetteringout:
4cd9a9d9ecf3a8835e21930f3215a5f5b74144beLennart Poettering        parent = skip_subsystem(parent, "ccw");
fe6521272ba203ec8f0d5a94f0729960b3f90525Lennart Poettering        return parent;
a6e87e90ede66815989ba2db92a07102a69906feLennart Poettering}
fe6521272ba203ec8f0d5a94f0729960b3f90525Lennart Poettering
fe6521272ba203ec8f0d5a94f0729960b3f90525Lennart Poetteringstatic int builtin_path_id(struct udev_device *dev, int argc, char *argv[], bool test) {
4cd9a9d9ecf3a8835e21930f3215a5f5b74144beLennart Poettering        struct udev_device *parent;
fe6521272ba203ec8f0d5a94f0729960b3f90525Lennart Poettering        char *path = NULL;
fe6521272ba203ec8f0d5a94f0729960b3f90525Lennart Poettering        bool supported_transport = false;
fe6521272ba203ec8f0d5a94f0729960b3f90525Lennart Poettering        bool supported_parent = false;
224f2ee221e77c326d1d7761abb6e812432b2163Lennart Poettering
224f2ee221e77c326d1d7761abb6e812432b2163Lennart Poettering        /* S390 ccw bus */
224f2ee221e77c326d1d7761abb6e812432b2163Lennart Poettering        parent = udev_device_get_parent_with_subsystem_devtype(dev, "ccw", NULL);
224f2ee221e77c326d1d7761abb6e812432b2163Lennart Poettering        if (parent != NULL) {
fe6521272ba203ec8f0d5a94f0729960b3f90525Lennart Poettering                handle_ccw(parent, dev, &path);
fe6521272ba203ec8f0d5a94f0729960b3f90525Lennart Poettering                goto out;
fe6521272ba203ec8f0d5a94f0729960b3f90525Lennart Poettering        }
fe6521272ba203ec8f0d5a94f0729960b3f90525Lennart Poettering
fe6521272ba203ec8f0d5a94f0729960b3f90525Lennart Poettering        /* walk up the chain of devices and compose path */
fe6521272ba203ec8f0d5a94f0729960b3f90525Lennart Poettering        parent = dev;
fe6521272ba203ec8f0d5a94f0729960b3f90525Lennart Poettering        while (parent != NULL) {
fe6521272ba203ec8f0d5a94f0729960b3f90525Lennart Poettering                const char *subsys;
fe6521272ba203ec8f0d5a94f0729960b3f90525Lennart Poettering
fe6521272ba203ec8f0d5a94f0729960b3f90525Lennart Poettering                subsys = udev_device_get_subsystem(parent);
fe6521272ba203ec8f0d5a94f0729960b3f90525Lennart Poettering                if (subsys == NULL) {
fe6521272ba203ec8f0d5a94f0729960b3f90525Lennart Poettering                        ;
fe6521272ba203ec8f0d5a94f0729960b3f90525Lennart Poettering                } else if (streq(subsys, "scsi_tape")) {
fe6521272ba203ec8f0d5a94f0729960b3f90525Lennart Poettering                        handle_scsi_tape(parent, &path);
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering                } else if (streq(subsys, "scsi")) {
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering                        parent = handle_scsi(parent, &path);
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering                        supported_transport = true;
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering                } else if (streq(subsys, "cciss")) {
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering                        parent = handle_cciss(parent, &path);
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering                        supported_transport = true;
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering                } else if (streq(subsys, "usb")) {
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering                        parent = handle_usb(parent, &path);
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering                        supported_transport = true;
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering                } else if (streq(subsys, "bcma")) {
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering                        parent = handle_bcma(parent, &path);
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering                        supported_transport = true;
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering                } else if (streq(subsys, "serio")) {
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering                        path_prepend(&path, "serio-%s", udev_device_get_sysnum(parent));
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering                        parent = skip_subsystem(parent, "serio");
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering                } else if (streq(subsys, "pci")) {
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering                        path_prepend(&path, "pci-%s", udev_device_get_sysname(parent));
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering                        parent = skip_subsystem(parent, "pci");
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering                        supported_parent = true;
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering                } else if (streq(subsys, "platform")) {
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering                        path_prepend(&path, "platform-%s", udev_device_get_sysname(parent));
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering                        parent = skip_subsystem(parent, "platform");
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering                        supported_transport = true;
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering                        supported_parent = true;
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering                } else if (streq(subsys, "acpi")) {
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering                        path_prepend(&path, "acpi-%s", udev_device_get_sysname(parent));
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering                        parent = skip_subsystem(parent, "acpi");
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering                        supported_parent = true;
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering                } else if (streq(subsys, "xen")) {
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering                        path_prepend(&path, "xen-%s", udev_device_get_sysname(parent));
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering                        parent = skip_subsystem(parent, "xen");
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering                        supported_parent = true;
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering                } else if (streq(subsys, "scm")) {
3ed08c446cfaaae2b234fdfeb0c34ab6b4748c3eLennart Poettering                        path_prepend(&path, "scm-%s", udev_device_get_sysname(parent));
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering                        parent = skip_subsystem(parent, "scm");
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering                        supported_transport = true;
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering                        supported_parent = true;
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering                }
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering                parent = udev_device_get_parent(parent);
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering        }
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering        /*
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering         * Do return devices with have an unknown type of parent device, they
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering         * might produce conflicting IDs below multiple independent parent
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering         * devices.
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering         */
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering        if (!supported_parent) {
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering                free(path);
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering                path = NULL;
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering        }
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering        /*
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering         * Do not return a have-only a single-parent block devices, some
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering         * have entire hidden buses behind it, and not create predictable
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering         * IDs that way.
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering         */
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering        if (streq(udev_device_get_subsystem(dev), "block") && !supported_transport) {
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering                free(path);
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering                path = NULL;
3ed08c446cfaaae2b234fdfeb0c34ab6b4748c3eLennart Poettering        }
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poetteringout:
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering        if (path != NULL) {
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering                char tag[UTIL_NAME_SIZE];
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering                size_t i;
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering                const char *p;
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering                /* compose valid udev tag name */
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering                for (p = path, i = 0; *p; p++) {
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering                        if ((*p >= '0' && *p <= '9') ||
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering                            (*p >= 'A' && *p <= 'Z') ||
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering                            (*p >= 'a' && *p <= 'z') ||
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering                            *p == '-') {
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering                                tag[i++] = *p;
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering                                continue;
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering                        }
18c7ed186be28800a2eeb37ad31c9c44480d3d9cLennart Poettering
18c7ed186be28800a2eeb37ad31c9c44480d3d9cLennart Poettering                        /* skip all leading '_' */
18c7ed186be28800a2eeb37ad31c9c44480d3d9cLennart Poettering                        if (i == 0)
18c7ed186be28800a2eeb37ad31c9c44480d3d9cLennart Poettering                                continue;
18c7ed186be28800a2eeb37ad31c9c44480d3d9cLennart Poettering
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering                        /* avoid second '_' */
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering                        if (tag[i-1] == '_')
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering                                continue;
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering                        tag[i++] = '_';
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering                }
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering                /* strip trailing '_' */
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering                while (i > 0 && tag[i-1] == '_')
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering                        i--;
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering                tag[i] = '\0';
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering                udev_builtin_add_property(dev, test, "ID_PATH", path);
3ed08c446cfaaae2b234fdfeb0c34ab6b4748c3eLennart Poettering                udev_builtin_add_property(dev, test, "ID_PATH_TAG", tag);
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering                free(path);
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering                return EXIT_SUCCESS;
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering        }
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering        return EXIT_FAILURE;
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering}
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poettering
b070e7f3c9ed680c821bd89d42506695f2438506Lennart Poetteringconst struct udev_builtin udev_builtin_path_id = {
18c7ed186be28800a2eeb37ad31c9c44480d3d9cLennart Poettering        .name = "path_id",
18c7ed186be28800a2eeb37ad31c9c44480d3d9cLennart Poettering        .cmd = builtin_path_id,
18c7ed186be28800a2eeb37ad31c9c44480d3d9cLennart Poettering        .help = "compose persistent device path",
18c7ed186be28800a2eeb37ad31c9c44480d3d9cLennart Poettering        .run_once = true,
18c7ed186be28800a2eeb37ad31c9c44480d3d9cLennart Poettering};
18c7ed186be28800a2eeb37ad31c9c44480d3d9cLennart Poettering