diff options
Diffstat (limited to 'src/udev/udev-builtin-path_id.c')
| -rw-r--r-- | src/udev/udev-builtin-path_id.c | 770 |
1 files changed, 0 insertions, 770 deletions
diff --git a/src/udev/udev-builtin-path_id.c b/src/udev/udev-builtin-path_id.c deleted file mode 100644 index 1825ee75a7..0000000000 --- a/src/udev/udev-builtin-path_id.c +++ /dev/null @@ -1,770 +0,0 @@ -/* - * compose persistent device path - * - * Copyright (C) 2009-2011 Kay Sievers <kay@vrfy.org> - * - * Logic based on Hannes Reinecke's shell script. - * - * This program is free software: you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation, either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program. If not, see <http://www.gnu.org/licenses/>. - */ - -#include <ctype.h> -#include <dirent.h> -#include <errno.h> -#include <fcntl.h> -#include <getopt.h> -#include <stdarg.h> -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <unistd.h> - -#include "alloc-util.h" -#include "string-util.h" -#include "udev.h" - -_printf_(2,3) -static int path_prepend(char **path, const char *fmt, ...) { - va_list va; - char *pre; - int err = 0; - - va_start(va, fmt); - err = vasprintf(&pre, fmt, va); - va_end(va); - if (err < 0) - goto out; - - if (*path != NULL) { - char *new; - - err = asprintf(&new, "%s-%s", pre, *path); - free(pre); - if (err < 0) - goto out; - free(*path); - *path = new; - } else { - *path = pre; - } -out: - return err; -} - -/* -** Linux only supports 32 bit luns. -** See drivers/scsi/scsi_scan.c::scsilun_to_int() for more details. -*/ -static int format_lun_number(struct udev_device *dev, char **path) { - unsigned long lun = strtoul(udev_device_get_sysnum(dev), NULL, 10); - - /* address method 0, peripheral device addressing with bus id of zero */ - if (lun < 256) - return path_prepend(path, "lun-%lu", lun); - /* handle all other lun addressing methods by using a variant of the original lun format */ - return path_prepend(path, "lun-0x%04lx%04lx00000000", lun & 0xffff, (lun >> 16) & 0xffff); -} - -static struct udev_device *skip_subsystem(struct udev_device *dev, const char *subsys) { - struct udev_device *parent = dev; - - assert(dev); - assert(subsys); - - while (parent != NULL) { - const char *subsystem; - - subsystem = udev_device_get_subsystem(parent); - if (subsystem == NULL || !streq(subsystem, subsys)) - break; - dev = parent; - parent = udev_device_get_parent(parent); - } - return dev; -} - -static struct udev_device *handle_scsi_fibre_channel(struct udev_device *parent, char **path) { - struct udev *udev = udev_device_get_udev(parent); - struct udev_device *targetdev; - struct udev_device *fcdev = NULL; - const char *port; - char *lun = NULL; - - assert(parent); - assert(path); - - targetdev = udev_device_get_parent_with_subsystem_devtype(parent, "scsi", "scsi_target"); - if (targetdev == NULL) - return NULL; - - fcdev = udev_device_new_from_subsystem_sysname(udev, "fc_transport", udev_device_get_sysname(targetdev)); - if (fcdev == NULL) - return NULL; - port = udev_device_get_sysattr_value(fcdev, "port_name"); - if (port == NULL) { - parent = NULL; - goto out; - } - - format_lun_number(parent, &lun); - path_prepend(path, "fc-%s-%s", port, lun); - free(lun); -out: - udev_device_unref(fcdev); - return parent; -} - -static struct udev_device *handle_scsi_sas_wide_port(struct udev_device *parent, char **path) { - struct udev *udev = udev_device_get_udev(parent); - struct udev_device *targetdev; - struct udev_device *target_parent; - struct udev_device *sasdev; - const char *sas_address; - char *lun = NULL; - - assert(parent); - assert(path); - - targetdev = udev_device_get_parent_with_subsystem_devtype(parent, "scsi", "scsi_target"); - if (targetdev == NULL) - return NULL; - - target_parent = udev_device_get_parent(targetdev); - if (target_parent == NULL) - return NULL; - - sasdev = udev_device_new_from_subsystem_sysname(udev, "sas_device", - udev_device_get_sysname(target_parent)); - if (sasdev == NULL) - return NULL; - - sas_address = udev_device_get_sysattr_value(sasdev, "sas_address"); - if (sas_address == NULL) { - parent = NULL; - goto out; - } - - format_lun_number(parent, &lun); - path_prepend(path, "sas-%s-%s", sas_address, lun); - free(lun); -out: - udev_device_unref(sasdev); - return parent; -} - -static struct udev_device *handle_scsi_sas(struct udev_device *parent, char **path) -{ - struct udev *udev = udev_device_get_udev(parent); - struct udev_device *targetdev; - struct udev_device *target_parent; - struct udev_device *port; - struct udev_device *expander; - struct udev_device *target_sasdev = NULL; - struct udev_device *expander_sasdev = NULL; - struct udev_device *port_sasdev = NULL; - const char *sas_address = NULL; - const char *phy_id; - const char *phy_count; - char *lun = NULL; - - assert(parent); - assert(path); - - targetdev = udev_device_get_parent_with_subsystem_devtype(parent, "scsi", "scsi_target"); - if (targetdev == NULL) - return NULL; - - target_parent = udev_device_get_parent(targetdev); - if (target_parent == NULL) - return NULL; - - /* Get sas device */ - target_sasdev = udev_device_new_from_subsystem_sysname(udev, - "sas_device", udev_device_get_sysname(target_parent)); - if (target_sasdev == NULL) - return NULL; - - /* The next parent is sas port */ - port = udev_device_get_parent(target_parent); - if (port == NULL) { - parent = NULL; - goto out; - } - - /* Get port device */ - port_sasdev = udev_device_new_from_subsystem_sysname(udev, - "sas_port", udev_device_get_sysname(port)); - - phy_count = udev_device_get_sysattr_value(port_sasdev, "num_phys"); - if (phy_count == NULL) { - parent = NULL; - goto out; - } - - /* Check if we are simple disk */ - if (strncmp(phy_count, "1", 2) != 0) { - parent = handle_scsi_sas_wide_port(parent, path); - goto out; - } - - /* Get connected phy */ - phy_id = udev_device_get_sysattr_value(target_sasdev, "phy_identifier"); - if (phy_id == NULL) { - parent = NULL; - goto out; - } - - /* The port's parent is either hba or expander */ - expander = udev_device_get_parent(port); - if (expander == NULL) { - parent = NULL; - goto out; - } - - /* Get expander device */ - expander_sasdev = udev_device_new_from_subsystem_sysname(udev, - "sas_device", udev_device_get_sysname(expander)); - if (expander_sasdev != NULL) { - /* Get expander's address */ - sas_address = udev_device_get_sysattr_value(expander_sasdev, - "sas_address"); - if (sas_address == NULL) { - parent = NULL; - goto out; - } - } - - format_lun_number(parent, &lun); - if (sas_address) - path_prepend(path, "sas-exp%s-phy%s-%s", sas_address, phy_id, lun); - else - path_prepend(path, "sas-phy%s-%s", phy_id, lun); - - free(lun); -out: - udev_device_unref(target_sasdev); - udev_device_unref(expander_sasdev); - udev_device_unref(port_sasdev); - return parent; -} - -static struct udev_device *handle_scsi_iscsi(struct udev_device *parent, char **path) { - struct udev *udev = udev_device_get_udev(parent); - struct udev_device *transportdev; - struct udev_device *sessiondev = NULL; - const char *target; - char *connname; - struct udev_device *conndev = NULL; - const char *addr; - const char *port; - char *lun = NULL; - - assert(parent); - assert(path); - - /* find iscsi session */ - transportdev = parent; - for (;;) { - transportdev = udev_device_get_parent(transportdev); - if (transportdev == NULL) - return NULL; - if (startswith(udev_device_get_sysname(transportdev), "session")) - break; - } - - /* find iscsi session device */ - sessiondev = udev_device_new_from_subsystem_sysname(udev, "iscsi_session", udev_device_get_sysname(transportdev)); - if (sessiondev == NULL) - return NULL; - target = udev_device_get_sysattr_value(sessiondev, "targetname"); - if (target == NULL) { - parent = NULL; - goto out; - } - - if (asprintf(&connname, "connection%s:0", udev_device_get_sysnum(transportdev)) < 0) { - parent = NULL; - goto out; - } - conndev = udev_device_new_from_subsystem_sysname(udev, "iscsi_connection", connname); - free(connname); - if (conndev == NULL) { - parent = NULL; - goto out; - } - addr = udev_device_get_sysattr_value(conndev, "persistent_address"); - port = udev_device_get_sysattr_value(conndev, "persistent_port"); - if (addr == NULL || port == NULL) { - parent = NULL; - goto out; - } - - format_lun_number(parent, &lun); - path_prepend(path, "ip-%s:%s-iscsi-%s-%s", addr, port, target, lun); - free(lun); -out: - udev_device_unref(sessiondev); - udev_device_unref(conndev); - return parent; -} - -static struct udev_device *handle_scsi_ata(struct udev_device *parent, char **path) { - struct udev *udev = udev_device_get_udev(parent); - struct udev_device *targetdev; - struct udev_device *target_parent; - struct udev_device *atadev; - const char *port_no; - - assert(parent); - assert(path); - - targetdev = udev_device_get_parent_with_subsystem_devtype(parent, "scsi", "scsi_host"); - if (!targetdev) - return NULL; - - target_parent = udev_device_get_parent(targetdev); - if (!target_parent) - return NULL; - - atadev = udev_device_new_from_subsystem_sysname(udev, "ata_port", udev_device_get_sysname(target_parent)); - if (!atadev) - return NULL; - - port_no = udev_device_get_sysattr_value(atadev, "port_no"); - if (!port_no) { - parent = NULL; - goto out; - } - path_prepend(path, "ata-%s", port_no); -out: - udev_device_unref(atadev); - return parent; -} - -static struct udev_device *handle_scsi_default(struct udev_device *parent, char **path) { - struct udev_device *hostdev; - int host, bus, target, lun; - const char *name; - char *base; - char *pos; - DIR *dir; - struct dirent *dent; - int basenum; - - assert(parent); - assert(path); - - hostdev = udev_device_get_parent_with_subsystem_devtype(parent, "scsi", "scsi_host"); - if (hostdev == NULL) - return NULL; - - name = udev_device_get_sysname(parent); - if (sscanf(name, "%d:%d:%d:%d", &host, &bus, &target, &lun) != 4) - return NULL; - - /* - * Rebase host offset to get the local relative number - * - * Note: This is by definition racy, unreliable and too simple. - * Please do not copy this model anywhere. It's just a left-over - * from the time we had no idea how things should look like in - * the end. - * - * Making assumptions about a global in-kernel counter and use - * that to calculate a local offset is a very broken concept. It - * can only work as long as things are in strict order. - * - * The kernel needs to export the instance/port number of a - * controller directly, without the need for rebase magic like - * this. Manual driver unbind/bind, parallel hotplug/unplug will - * get into the way of this "I hope it works" logic. - */ - basenum = -1; - base = strdup(udev_device_get_syspath(hostdev)); - if (base == NULL) - return NULL; - pos = strrchr(base, '/'); - if (pos == NULL) { - parent = NULL; - goto out; - } - pos[0] = '\0'; - dir = opendir(base); - if (dir == NULL) { - parent = NULL; - goto out; - } - for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) { - char *rest; - int i; - - if (dent->d_name[0] == '.') - continue; - if (dent->d_type != DT_DIR && dent->d_type != DT_LNK) - continue; - if (!startswith(dent->d_name, "host")) - continue; - i = strtoul(&dent->d_name[4], &rest, 10); - if (rest[0] != '\0') - continue; - /* - * find the smallest number; the host really needs to export its - * own instance number per parent device; relying on the global host - * enumeration and plainly rebasing the numbers sounds unreliable - */ - if (basenum == -1 || i < basenum) - basenum = i; - } - closedir(dir); - if (basenum == -1) { - parent = NULL; - goto out; - } - host -= basenum; - - path_prepend(path, "scsi-%u:%u:%u:%u", host, bus, target, lun); -out: - free(base); - return hostdev; -} - -static struct udev_device *handle_scsi_hyperv(struct udev_device *parent, char **path) { - struct udev_device *hostdev; - struct udev_device *vmbusdev; - const char *guid_str; - char *lun = NULL; - char guid[38]; - size_t i, k; - - assert(parent); - assert(path); - - hostdev = udev_device_get_parent_with_subsystem_devtype(parent, "scsi", "scsi_host"); - if (!hostdev) - return NULL; - - vmbusdev = udev_device_get_parent(hostdev); - if (!vmbusdev) - return NULL; - - guid_str = udev_device_get_sysattr_value(vmbusdev, "device_id"); - if (!guid_str) - return NULL; - - if (strlen(guid_str) < 37 || guid_str[0] != '{' || guid_str[36] != '}') - return NULL; - - for (i = 1, k = 0; i < 36; i++) { - if (guid_str[i] == '-') - continue; - guid[k++] = guid_str[i]; - } - guid[k] = '\0'; - - format_lun_number(parent, &lun); - path_prepend(path, "vmbus-%s-%s", guid, lun); - free(lun); - return parent; -} - -static struct udev_device *handle_scsi(struct udev_device *parent, char **path, bool *supported_parent) { - const char *devtype; - const char *name; - const char *id; - - devtype = udev_device_get_devtype(parent); - if (devtype == NULL || !streq(devtype, "scsi_device")) - return parent; - - /* firewire */ - id = udev_device_get_sysattr_value(parent, "ieee1394_id"); - if (id != NULL) { - parent = skip_subsystem(parent, "scsi"); - path_prepend(path, "ieee1394-0x%s", id); - *supported_parent = true; - goto out; - } - - /* scsi sysfs does not have a "subsystem" for the transport */ - name = udev_device_get_syspath(parent); - - if (strstr(name, "/rport-") != NULL) { - parent = handle_scsi_fibre_channel(parent, path); - *supported_parent = true; - goto out; - } - - if (strstr(name, "/end_device-") != NULL) { - parent = handle_scsi_sas(parent, path); - *supported_parent = true; - goto out; - } - - if (strstr(name, "/session") != NULL) { - parent = handle_scsi_iscsi(parent, path); - *supported_parent = true; - goto out; - } - - if (strstr(name, "/ata") != NULL) { - parent = handle_scsi_ata(parent, path); - goto out; - } - - if (strstr(name, "/vmbus_") != NULL) { - parent = handle_scsi_hyperv(parent, path); - goto out; - } - - parent = handle_scsi_default(parent, path); -out: - return parent; -} - -static struct udev_device *handle_cciss(struct udev_device *parent, char **path) { - const char *str; - unsigned int controller, disk; - - str = udev_device_get_sysname(parent); - if (sscanf(str, "c%ud%u%*s", &controller, &disk) != 2) - return NULL; - - path_prepend(path, "cciss-disk%u", disk); - parent = skip_subsystem(parent, "cciss"); - return parent; -} - -static void handle_scsi_tape(struct udev_device *dev, char **path) { - const char *name; - - /* must be the last device in the syspath */ - if (*path != NULL) - return; - - name = udev_device_get_sysname(dev); - if (startswith(name, "nst") && strchr("lma", name[3]) != NULL) - path_prepend(path, "nst%c", name[3]); - else if (startswith(name, "st") && strchr("lma", name[2]) != NULL) - path_prepend(path, "st%c", name[2]); -} - -static struct udev_device *handle_usb(struct udev_device *parent, char **path) { - const char *devtype; - const char *str; - const char *port; - - devtype = udev_device_get_devtype(parent); - if (devtype == NULL) - return parent; - if (!streq(devtype, "usb_interface") && !streq(devtype, "usb_device")) - return parent; - - str = udev_device_get_sysname(parent); - port = strchr(str, '-'); - if (port == NULL) - return parent; - port++; - - parent = skip_subsystem(parent, "usb"); - path_prepend(path, "usb-0:%s", port); - return parent; -} - -static struct udev_device *handle_bcma(struct udev_device *parent, char **path) { - const char *sysname; - unsigned int core; - - sysname = udev_device_get_sysname(parent); - if (sscanf(sysname, "bcma%*u:%u", &core) != 1) - return NULL; - - path_prepend(path, "bcma-%u", core); - return parent; -} - -/* Handle devices of AP bus in System z platform. */ -static struct udev_device *handle_ap(struct udev_device *parent, char **path) { - const char *type, *func; - - assert(parent); - assert(path); - - type = udev_device_get_sysattr_value(parent, "type"); - func = udev_device_get_sysattr_value(parent, "ap_functions"); - - if (type != NULL && func != NULL) { - path_prepend(path, "ap-%s-%s", type, func); - goto out; - } - path_prepend(path, "ap-%s", udev_device_get_sysname(parent)); -out: - parent = skip_subsystem(parent, "ap"); - return parent; -} - -static int builtin_path_id(struct udev_device *dev, int argc, char *argv[], bool test) { - struct udev_device *parent; - char *path = NULL; - bool supported_transport = false; - bool supported_parent = false; - - assert(dev); - - /* walk up the chain of devices and compose path */ - parent = dev; - while (parent != NULL) { - const char *subsys; - - subsys = udev_device_get_subsystem(parent); - if (subsys == NULL) { - ; - } else if (streq(subsys, "scsi_tape")) { - handle_scsi_tape(parent, &path); - } else if (streq(subsys, "scsi")) { - parent = handle_scsi(parent, &path, &supported_parent); - supported_transport = true; - } else if (streq(subsys, "cciss")) { - parent = handle_cciss(parent, &path); - supported_transport = true; - } else if (streq(subsys, "usb")) { - parent = handle_usb(parent, &path); - supported_transport = true; - } else if (streq(subsys, "bcma")) { - parent = handle_bcma(parent, &path); - supported_transport = true; - } else if (streq(subsys, "serio")) { - path_prepend(&path, "serio-%s", udev_device_get_sysnum(parent)); - parent = skip_subsystem(parent, "serio"); - } else if (streq(subsys, "pci")) { - path_prepend(&path, "pci-%s", udev_device_get_sysname(parent)); - parent = skip_subsystem(parent, "pci"); - supported_parent = true; - } else if (streq(subsys, "platform")) { - path_prepend(&path, "platform-%s", udev_device_get_sysname(parent)); - parent = skip_subsystem(parent, "platform"); - supported_transport = true; - supported_parent = true; - } else if (streq(subsys, "acpi")) { - path_prepend(&path, "acpi-%s", udev_device_get_sysname(parent)); - parent = skip_subsystem(parent, "acpi"); - supported_parent = true; - } else if (streq(subsys, "xen")) { - path_prepend(&path, "xen-%s", udev_device_get_sysname(parent)); - parent = skip_subsystem(parent, "xen"); - supported_parent = true; - } else if (streq(subsys, "virtio")) { - while (parent && streq_ptr("virtio", udev_device_get_subsystem(parent))) - parent = udev_device_get_parent(parent); - path_prepend(&path, "virtio-pci-%s", udev_device_get_sysname(parent)); - supported_transport = true; - supported_parent = true; - } else if (streq(subsys, "scm")) { - path_prepend(&path, "scm-%s", udev_device_get_sysname(parent)); - parent = skip_subsystem(parent, "scm"); - supported_transport = true; - supported_parent = true; - } else if (streq(subsys, "ccw")) { - path_prepend(&path, "ccw-%s", udev_device_get_sysname(parent)); - parent = skip_subsystem(parent, "ccw"); - supported_transport = true; - supported_parent = true; - } else if (streq(subsys, "ccwgroup")) { - path_prepend(&path, "ccwgroup-%s", udev_device_get_sysname(parent)); - parent = skip_subsystem(parent, "ccwgroup"); - supported_transport = true; - supported_parent = true; - } else if (streq(subsys, "ap")) { - parent = handle_ap(parent, &path); - supported_transport = true; - supported_parent = true; - } else if (streq(subsys, "iucv")) { - path_prepend(&path, "iucv-%s", udev_device_get_sysname(parent)); - parent = skip_subsystem(parent, "iucv"); - supported_transport = true; - supported_parent = true; - } else if (streq(subsys, "nvme")) { - const char *nsid = udev_device_get_sysattr_value(dev, "nsid"); - - if (nsid) { - path_prepend(&path, "nvme-%s", nsid); - parent = skip_subsystem(parent, "nvme"); - supported_parent = true; - supported_transport = true; - } - } - - if (parent) - parent = udev_device_get_parent(parent); - } - - /* - * Do not return devices with an unknown parent device type. They - * might produce conflicting IDs if the parent does not provide a - * unique and predictable name. - */ - if (!supported_parent) - path = mfree(path); - - /* - * Do not return block devices without a well-known transport. Some - * devices do not expose their buses and do not provide a unique - * and predictable name that way. - */ - if (streq_ptr(udev_device_get_subsystem(dev), "block") && !supported_transport) - path = mfree(path); - - if (path != NULL) { - char tag[UTIL_NAME_SIZE]; - size_t i; - const char *p; - - /* compose valid udev tag name */ - for (p = path, i = 0; *p; p++) { - if ((*p >= '0' && *p <= '9') || - (*p >= 'A' && *p <= 'Z') || - (*p >= 'a' && *p <= 'z') || - *p == '-') { - tag[i++] = *p; - continue; - } - - /* skip all leading '_' */ - if (i == 0) - continue; - - /* avoid second '_' */ - if (tag[i-1] == '_') - continue; - - tag[i++] = '_'; - } - /* strip trailing '_' */ - while (i > 0 && tag[i-1] == '_') - i--; - tag[i] = '\0'; - - udev_builtin_add_property(dev, test, "ID_PATH", path); - udev_builtin_add_property(dev, test, "ID_PATH_TAG", tag); - free(path); - return EXIT_SUCCESS; - } - return EXIT_FAILURE; -} - -const struct udev_builtin udev_builtin_path_id = { - .name = "path_id", - .cmd = builtin_path_id, - .help = "Compose persistent device path", - .run_once = true, -}; |