-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
+/* SPDX-License-Identifier: GPL-2.0+ */
/*
* compose persistent device path
*
*/
#include <ctype.h>
-#include <dirent.h>
#include <errno.h>
#include <fcntl.h>
#include <getopt.h>
#include <unistd.h>
#include "alloc-util.h"
+#include "dirent-util.h"
+#include "fd-util.h"
#include "string-util.h"
+#include "sysexits.h"
#include "udev.h"
+#include "udev-util.h"
_printf_(2,3)
-static int path_prepend(char **path, const char *fmt, ...) {
+static void path_prepend(char **path, const char *fmt, ...) {
va_list va;
- char *pre;
- int err = 0;
+ _cleanup_free_ char *pre = NULL;
+ int r;
va_start(va, fmt);
- err = vasprintf(&pre, fmt, va);
+ r = vasprintf(&pre, fmt, va);
va_end(va);
- if (err < 0)
- goto out;
+ if (r < 0) {
+ log_oom();
+ exit(EX_OSERR);
+ }
- if (*path != NULL) {
+ if (*path) {
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;
+ new = strjoin(pre, "-", *path);
+ if (!new) {
+ log_oom();
+ exit(EX_OSERR);
+ }
+
+ free_and_replace(*path, new);
+ } else
+ *path = TAKE_PTR(pre);
}
/*
** 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) {
+static void 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);
+ /* address method 0, peripheral device addressing with bus id of zero */
+ path_prepend(path, "lun-%lu", lun);
+ else
+ /* handle all other lun addressing methods by using a variant of the original lun format */
+ 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) {
assert(dev);
assert(subsys);
- while (parent != NULL) {
+ while (parent) {
const char *subsystem;
subsystem = udev_device_get_subsystem(parent);
- if (subsystem == NULL || !streq(subsystem, subsys))
+ if (!streq_ptr(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 *udev;
struct udev_device *targetdev;
- struct udev_device *fcdev = NULL;
+ _cleanup_udev_device_unref_ struct udev_device *fcdev = NULL;
const char *port;
- char *lun = NULL;
+ _cleanup_free_ char *lun = NULL;
assert(parent);
assert(path);
+ udev = udev_device_get_udev(parent);
+
targetdev = udev_device_get_parent_with_subsystem_devtype(parent, "scsi", "scsi_target");
- if (targetdev == NULL)
+ if (!targetdev)
return NULL;
fcdev = udev_device_new_from_subsystem_sysname(udev, "fc_transport", udev_device_get_sysname(targetdev));
- if (fcdev == NULL)
+ if (!fcdev)
return NULL;
+
port = udev_device_get_sysattr_value(fcdev, "port_name");
- if (port == NULL) {
- parent = NULL;
- goto out;
- }
+ if (!port)
+ return NULL;
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;
+ struct udev *udev;
+ struct udev_device *targetdev, *target_parent;
+ _cleanup_udev_device_unref_ struct udev_device *sasdev = NULL;
const char *sas_address;
- char *lun = NULL;
+ _cleanup_free_ char *lun = NULL;
assert(parent);
assert(path);
+ udev = udev_device_get_udev(parent);
+
targetdev = udev_device_get_parent_with_subsystem_devtype(parent, "scsi", "scsi_target");
- if (targetdev == NULL)
+ if (!targetdev)
return NULL;
target_parent = udev_device_get_parent(targetdev);
- if (target_parent == NULL)
+ if (!target_parent)
return NULL;
sasdev = udev_device_new_from_subsystem_sysname(udev, "sas_device",
- udev_device_get_sysname(target_parent));
- if (sasdev == NULL)
+ udev_device_get_sysname(target_parent));
+ if (!sasdev)
return NULL;
sas_address = udev_device_get_sysattr_value(sasdev, "sas_address");
- if (sas_address == NULL) {
- parent = NULL;
- goto out;
- }
+ if (!sas_address)
+ return NULL;
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;
+ struct udev *udev;
+ struct udev_device *targetdev, *target_parent, *port, *expander;
+ _cleanup_udev_device_unref_ struct udev_device
+ *target_sasdev = NULL, *expander_sasdev = NULL, *port_sasdev = NULL;
const char *sas_address = NULL;
const char *phy_id;
const char *phy_count;
- char *lun = NULL;
+ _cleanup_free_ char *lun = NULL;
assert(parent);
assert(path);
+ udev = udev_device_get_udev(parent);
+
targetdev = udev_device_get_parent_with_subsystem_devtype(parent, "scsi", "scsi_target");
- if (targetdev == NULL)
+ if (!targetdev)
return NULL;
target_parent = udev_device_get_parent(targetdev);
- if (target_parent == NULL)
+ if (!target_parent)
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)
+ target_sasdev = udev_device_new_from_subsystem_sysname(
+ udev, "sas_device", udev_device_get_sysname(target_parent));
+ if (!target_sasdev)
return NULL;
/* The next parent is sas port */
port = udev_device_get_parent(target_parent);
- if (port == NULL) {
- parent = NULL;
- goto out;
- }
+ if (!port)
+ return NULL;
/* Get port device */
- port_sasdev = udev_device_new_from_subsystem_sysname(udev,
- "sas_port", udev_device_get_sysname(port));
+ 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;
- }
+ if (!phy_count)
+ return NULL;
/* Check if we are simple disk */
- if (strncmp(phy_count, "1", 2) != 0) {
- parent = handle_scsi_sas_wide_port(parent, path);
- goto out;
- }
+ if (strncmp(phy_count, "1", 2) != 0)
+ return handle_scsi_sas_wide_port(parent, path);
/* Get connected phy */
phy_id = udev_device_get_sysattr_value(target_sasdev, "phy_identifier");
- if (phy_id == NULL) {
- parent = NULL;
- goto out;
- }
+ if (!phy_id)
+ return NULL;
/* The port's parent is either hba or expander */
expander = udev_device_get_parent(port);
- if (expander == NULL) {
- parent = NULL;
- goto out;
- }
+ if (!expander)
+ return NULL;
/* Get expander device */
- expander_sasdev = udev_device_new_from_subsystem_sysname(udev,
- "sas_device", udev_device_get_sysname(expander));
- if (expander_sasdev != NULL) {
+ expander_sasdev = udev_device_new_from_subsystem_sysname(
+ udev, "sas_device", udev_device_get_sysname(expander));
+ if (expander_sasdev) {
/* Get expander's address */
sas_address = udev_device_get_sysattr_value(expander_sasdev,
"sas_address");
- if (sas_address == NULL) {
- parent = NULL;
- goto out;
- }
+ if (!sas_address)
+ return NULL;
}
format_lun_number(parent, &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 *udev;
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;
+ _cleanup_udev_device_unref_ struct udev_device
+ *sessiondev = NULL, *conndev = NULL;
+ const char *target, *connname, *addr, *port;
+ _cleanup_free_ char *lun = NULL;
assert(parent);
assert(path);
+ udev = udev_device_get_udev(parent);
+
/* find iscsi session */
transportdev = parent;
for (;;) {
transportdev = udev_device_get_parent(transportdev);
- if (transportdev == NULL)
+ if (!transportdev)
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)
+ if (!sessiondev)
return NULL;
+
target = udev_device_get_sysattr_value(sessiondev, "targetname");
- if (target == NULL) {
- parent = NULL;
- goto out;
- }
+ if (!target)
+ return NULL;
- if (asprintf(&connname, "connection%s:0", udev_device_get_sysnum(transportdev)) < 0) {
- parent = NULL;
- goto out;
- }
+ connname = strjoina("connection", udev_device_get_sysnum(transportdev), ":0");
conndev = udev_device_new_from_subsystem_sysname(udev, "iscsi_connection", connname);
- free(connname);
- if (conndev == NULL) {
- parent = NULL;
- goto out;
- }
+ if (!conndev)
+ return NULL;
+
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;
- }
+ if (!addr || !port)
+ return NULL;
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;
+ struct udev *udev;
+ struct udev_device *targetdev, *target_parent;
+ _cleanup_udev_device_unref_ struct udev_device *atadev = NULL;
const char *port_no;
assert(parent);
assert(path);
+ udev = udev_device_get_udev(parent);
+
targetdev = udev_device_get_parent_with_subsystem_devtype(parent, "scsi", "scsi_host");
if (!targetdev)
return NULL;
return NULL;
port_no = udev_device_get_sysattr_value(atadev, "port_no");
- if (!port_no) {
- parent = NULL;
- goto out;
- }
+ if (!port_no)
+ return NULL;
+
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;
+ const char *name, *base, *pos;
+ _cleanup_closedir_ DIR *dir = NULL;
struct dirent *dent;
- int basenum;
+ int basenum = -1;
assert(parent);
assert(path);
hostdev = udev_device_get_parent_with_subsystem_devtype(parent, "scsi", "scsi_host");
- if (hostdev == NULL)
+ if (!hostdev)
return NULL;
name = udev_device_get_sysname(parent);
* 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;
+
+ base = udev_device_get_syspath(hostdev);
pos = strrchr(base, '/');
- if (pos == NULL) {
- parent = NULL;
- goto out;
- }
- pos[0] = '\0';
+ if (!pos)
+ return NULL;
+
+ base = strndupa(base, pos - base);
dir = opendir(base);
- if (dir == NULL) {
- parent = NULL;
- goto out;
- }
- for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
+ if (!dir)
+ return NULL;
+
+ FOREACH_DIRENT_ALL(dent, dir, break) {
char *rest;
int i;
if (dent->d_name[0] == '.')
continue;
- if (dent->d_type != DT_DIR && dent->d_type != DT_LNK)
+ if (!IN_SET(dent->d_type, DT_DIR, DT_LNK))
continue;
if (!startswith(dent->d_name, "host"))
continue;
if (basenum == -1 || i < basenum)
basenum = i;
}
- closedir(dir);
- if (basenum == -1) {
- parent = NULL;
- goto out;
- }
+ if (basenum == -1)
+ return hostdev;
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) {
+static struct udev_device *handle_scsi_hyperv(struct udev_device *parent, char **path, size_t guid_str_len) {
struct udev_device *hostdev;
struct udev_device *vmbusdev;
const char *guid_str;
- char *lun = NULL;
- char guid[38];
+ _cleanup_free_ char *lun = NULL;
+ char guid[39];
size_t i, k;
assert(parent);
assert(path);
+ assert(guid_str_len < sizeof(guid));
hostdev = udev_device_get_parent_with_subsystem_devtype(parent, "scsi", "scsi_host");
if (!hostdev)
if (!guid_str)
return NULL;
- if (strlen(guid_str) < 37 || guid_str[0] != '{' || guid_str[36] != '}')
+ if (strlen(guid_str) < guid_str_len || guid_str[0] != '{' || guid_str[guid_str_len-1] != '}')
return NULL;
- for (i = 1, k = 0; i < 36; i++) {
+ for (i = 1, k = 0; i < guid_str_len-1; i++) {
if (guid_str[i] == '-')
continue;
guid[k++] = guid_str[i];
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;
+ const char *devtype, *id, *name;
devtype = udev_device_get_devtype(parent);
- if (devtype == NULL || !streq(devtype, "scsi_device"))
+ if (!streq_ptr(devtype, "scsi_device"))
return parent;
/* firewire */
id = udev_device_get_sysattr_value(parent, "ieee1394_id");
- if (id != NULL) {
- parent = skip_subsystem(parent, "scsi");
+ if (id) {
path_prepend(path, "ieee1394-0x%s", id);
*supported_parent = true;
- goto out;
+ return skip_subsystem(parent, "scsi");
}
/* 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);
+ if (strstr(name, "/rport-")) {
*supported_parent = true;
- goto out;
+ return handle_scsi_fibre_channel(parent, path);
}
- if (strstr(name, "/end_device-") != NULL) {
- parent = handle_scsi_sas(parent, path);
+ if (strstr(name, "/end_device-")) {
*supported_parent = true;
- goto out;
+ return handle_scsi_sas(parent, path);
}
- if (strstr(name, "/session") != NULL) {
- parent = handle_scsi_iscsi(parent, path);
+ if (strstr(name, "/session")) {
*supported_parent = true;
- goto out;
+ return handle_scsi_iscsi(parent, path);
}
- if (strstr(name, "/ata") != NULL) {
- parent = handle_scsi_ata(parent, path);
- goto out;
- }
+ if (strstr(name, "/ata"))
+ return handle_scsi_ata(parent, path);
- if (strstr(name, "/vmbus_") != NULL) {
- parent = handle_scsi_hyperv(parent, path);
- goto out;
- }
+ if (strstr(name, "/vmbus_"))
+ return handle_scsi_hyperv(parent, path, 37);
+ else if (strstr(name, "/VMBUS"))
+ return handle_scsi_hyperv(parent, path, 38);
- parent = handle_scsi_default(parent, path);
-out:
- return parent;
+ return handle_scsi_default(parent, path);
}
static struct udev_device *handle_cciss(struct udev_device *parent, char **path) {
return NULL;
path_prepend(path, "cciss-disk%u", disk);
- parent = skip_subsystem(parent, "cciss");
- return parent;
+ return skip_subsystem(parent, "cciss");
}
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)
+ if (*path)
return;
name = udev_device_get_sysname(dev);
- if (startswith(name, "nst") && strchr("lma", name[3]) != NULL)
+ if (startswith(name, "nst") && strchr("lma", name[3]))
path_prepend(path, "nst%c", name[3]);
- else if (startswith(name, "st") && strchr("lma", name[2]) != NULL)
+ else if (startswith(name, "st") && strchr("lma", name[2]))
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;
+ const char *devtype, *str, *port;
devtype = udev_device_get_devtype(parent);
- if (devtype == NULL)
+ if (!devtype)
return parent;
- if (!streq(devtype, "usb_interface") && !streq(devtype, "usb_device"))
+ if (!STR_IN_SET(devtype, "usb_interface", "usb_device"))
return parent;
str = udev_device_get_sysname(parent);
port = strchr(str, '-');
- if (port == NULL)
+ if (!port)
return parent;
port++;
- parent = skip_subsystem(parent, "usb");
path_prepend(path, "usb-0:%s", port);
- return parent;
+ return skip_subsystem(parent, "usb");
}
static struct udev_device *handle_bcma(struct udev_device *parent, char **path) {
type = udev_device_get_sysattr_value(parent, "type");
func = udev_device_get_sysattr_value(parent, "ap_functions");
- if (type != NULL && func != NULL) {
+ if (type && func)
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;
+ else
+ path_prepend(path, "ap-%s", udev_device_get_sysname(parent));
+
+ return skip_subsystem(parent, "ap");
}
static int builtin_path_id(struct udev_device *dev, int argc, char *argv[], bool test) {
struct udev_device *parent;
- char *path = NULL;
+ _cleanup_free_ char *path = NULL;
bool supported_transport = false;
bool supported_parent = false;
/* walk up the chain of devices and compose path */
parent = dev;
- while (parent != NULL) {
+ while (parent) {
const char *subsys;
subsys = udev_device_get_subsystem(parent);
- if (subsys == NULL) {
+ if (!subsys) {
;
} else if (streq(subsys, "scsi_tape")) {
handle_scsi_tape(parent, &path);
path_prepend(&path, "xen-%s", udev_device_get_sysname(parent));
parent = skip_subsystem(parent, "xen");
supported_parent = true;
+ } else if (streq(subsys, "virtio")) {
+ parent = skip_subsystem(parent, "virtio");
+ supported_transport = true;
} else if (streq(subsys, "scm")) {
path_prepend(&path, "scm-%s", udev_device_get_sysname(parent));
parent = skip_subsystem(parent, "scm");
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);
}
+ if (!path)
+ return EXIT_FAILURE;
+
/*
* 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);
+ return EXIT_FAILURE;
/*
* 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(udev_device_get_subsystem(dev), "block") && !supported_transport)
- path = mfree(path);
+ if (streq_ptr(udev_device_get_subsystem(dev), "block") && !supported_transport)
+ return EXIT_FAILURE;
- if (path != NULL) {
+ {
char tag[UTIL_NAME_SIZE];
size_t i;
const char *p;
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;
+
+ return EXIT_SUCCESS;
}
const struct udev_builtin udev_builtin_path_id = {
projects / thirdparty / systemd.git / blobdiff