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https://github.com/systemd/systemd.git
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udev: add USB revision in ID_PATH
xHCI host controller may register two (or more?) USB root hubs for USB 2.0 and USB 3.0, and devices under the hubs may have same ID_PATH. So, to avoid the conflict, let's introduce ID_PATH_WITH_USB_REVISION that includes the USB revision. Closes #19406.
This commit is contained in:
Yu Watanabe
parent
5a54a01634
commit
873be895ed
@ -3,6 +3,9 @@
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ACTION!="remove", SUBSYSTEM=="drm", SUBSYSTEMS=="pci|usb|platform", IMPORT{builtin}="path_id"
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# by-path
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ENV{ID_PATH}=="?*", KERNEL=="card*", SYMLINK+="dri/by-path/$env{ID_PATH}-card"
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ENV{ID_PATH}=="?*", KERNEL=="controlD*", SYMLINK+="dri/by-path/$env{ID_PATH}-control"
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ENV{ID_PATH}=="?*", KERNEL=="renderD*", SYMLINK+="dri/by-path/$env{ID_PATH}-render"
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KERNEL=="card*", ENV{ID_PATH}=="?*", SYMLINK+="dri/by-path/$env{ID_PATH}-card"
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KERNEL=="card*", ENV{ID_PATH_WITH_USB_REVISION}=="?*", SYMLINK+="dri/by-path/$env{ID_PATH_WITH_USB_REVISION}-card"
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KERNEL=="controlD*", ENV{ID_PATH}=="?*", SYMLINK+="dri/by-path/$env{ID_PATH}-control"
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KERNEL=="controlD*", ENV{ID_PATH_WITH_USB_REVISION}=="?*", SYMLINK+="dri/by-path/$env{ID_PATH_WITH_USB_REVISION}-control"
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KERNEL=="renderD*", ENV{ID_PATH}=="?*", SYMLINK+="dri/by-path/$env{ID_PATH}-render"
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KERNEL=="renderD*", ENV{ID_PATH_WITH_USB_REVISION}=="?*", SYMLINK+="dri/by-path/$env{ID_PATH_WITH_USB_REVISION}-render"
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@ -9,6 +9,7 @@ ENV{ID_SERIAL}=="?*", ENV{ID_USB_INTERFACE_NUM}=="?*", SYMLINK+="snd/by-id/$env{
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ENV{ID_SERIAL}=="?*", ENV{ID_USB_INTERFACE_NUM}=="", SYMLINK+="snd/by-id/$env{ID_BUS}-$env{ID_SERIAL}"
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IMPORT{builtin}="path_id"
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ENV{ID_PATH}=="?*", SYMLINK+="snd/by-path/$env{ID_PATH}"
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ENV{ID_PATH}=="?*", SYMLINK+="snd/by-path/$env{ID_PATH}"
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ENV{ID_PATH_WITH_USB_REVISION}=="?*", SYMLINK+="snd/by-path/$env{ID_PATH_WITH_USB_REVISION}"
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LABEL="persistent_alsa_end"
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@ -33,10 +33,14 @@ SUBSYSTEMS=="usb", ENV{ID_BUS}=="?*", KERNEL=="event*", ENV{.INPUT_CLASS}=="", A
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# by-path
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SUBSYSTEMS=="pci|usb|platform|acpi", IMPORT{builtin}="path_id"
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ENV{ID_PATH}=="?*", KERNEL=="mouse*|js*", ENV{.INPUT_CLASS}=="?*", SYMLINK+="input/by-path/$env{ID_PATH}-$env{.INPUT_CLASS}"
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ENV{ID_PATH}=="?*", KERNEL=="event*", ENV{.INPUT_CLASS}=="?*", SYMLINK+="input/by-path/$env{ID_PATH}-event-$env{.INPUT_CLASS}"
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ENV{.INPUT_CLASS}=="?*", KERNEL=="mouse*|js*", ENV{ID_PATH}=="?*", SYMLINK+="input/by-path/$env{ID_PATH}-$env{.INPUT_CLASS}"
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ENV{.INPUT_CLASS}=="?*", KERNEL=="mouse*|js*", ENV{ID_PATH_WITH_USB_REVISION}=="?*", SYMLINK+="input/by-path/$env{ID_PATH_WITH_USB_REVISION}-$env{.INPUT_CLASS}"
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ENV{.INPUT_CLASS}=="?*", KERNEL=="event*", ENV{ID_PATH}=="?*", SYMLINK+="input/by-path/$env{ID_PATH}-event-$env{.INPUT_CLASS}"
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ENV{.INPUT_CLASS}=="?*", KERNEL=="event*", ENV{ID_PATH_WITH_USB_REVISION}=="?*", SYMLINK+="input/by-path/$env{ID_PATH_WITH_USB_REVISION}-event-$env{.INPUT_CLASS}"
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# allow empty class for platform, usb and i2c devices; platform supports only a single interface that way
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SUBSYSTEMS=="usb|platform|i2c", ENV{ID_PATH}=="?*", KERNEL=="event*", ENV{.INPUT_CLASS}=="", \
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SUBSYSTEMS=="usb|platform|i2c", KERNEL=="event*", ENV{.INPUT_CLASS}=="", ENV{ID_PATH}=="?*", \
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SYMLINK+="input/by-path/$env{ID_PATH}-event"
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SUBSYSTEMS=="usb|platform|i2c", KERNEL=="event*", ENV{.INPUT_CLASS}=="", ENV{ID_PATH_WITH_USB_REVISION}=="?*", \
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SYMLINK+="input/by-path/$env{ID_PATH_WITH_USB_REVISION}-event"
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LABEL="persistent_input_end"
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@ -19,7 +19,8 @@ ENV{ID_SERIAL}=="?*", SYMLINK+="tape/by-id/scsi-$env{ID_SERIAL} tape/by-id/scsi-
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ENV{ID_SCSI_SERIAL}=="?*", SYMLINK+="tape/by-id/scsi-$env{ID_SCSI_SERIAL}"
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IMPORT{builtin}="path_id"
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ENV{ID_PATH}=="?*", SYMLINK+="tape/by-path/$env{ID_PATH}-changer"
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ENV{ID_PATH}=="?*", SYMLINK+="tape/by-path/$env{ID_PATH}-changer"
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ENV{ID_PATH_WITH_USB_REVISION}=="?*", SYMLINK+="tape/by-path/$env{ID_PATH_WITH_USB_REVISION}-changer"
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LABEL="medium_changer_end"
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@ -36,7 +37,9 @@ KERNEL=="nst*[0-9]", ENV{ID_SCSI_SERIAL}=="?*", SYMLINK+="tape/by-id/$env{ID_BUS
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# by-path (parent device path)
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KERNEL=="st*[0-9]|nst*[0-9]", IMPORT{builtin}="path_id"
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KERNEL=="st*[0-9]", ENV{ID_PATH}=="?*", SYMLINK+="tape/by-path/$env{ID_PATH}"
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KERNEL=="nst*[0-9]", ENV{ID_PATH}=="?*", SYMLINK+="tape/by-path/$env{ID_PATH}-nst"
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KERNEL=="st*[0-9]", ENV{ID_PATH}=="?*", SYMLINK+="tape/by-path/$env{ID_PATH}"
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KERNEL=="st*[0-9]", ENV{ID_PATH_WITH_USB_REVISION}=="?*", SYMLINK+="tape/by-path/$env{ID_PATH_WITH_USB_REVISION}"
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KERNEL=="nst*[0-9]", ENV{ID_PATH}=="?*", SYMLINK+="tape/by-path/$env{ID_PATH}-nst"
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KERNEL=="nst*[0-9]", ENV{ID_PATH_WITH_USB_REVISION}=="?*", SYMLINK+="tape/by-path/$env{ID_PATH_WITH_USB_REVISION}-nst"
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LABEL="persistent_storage_tape_end"
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@ -111,16 +111,20 @@ KERNEL=="msblk[0-9]p[0-9]|mspblk[0-9]p[0-9]", ENV{ID_NAME}=="?*", ENV{ID_SERIAL}
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# by-path
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ENV{DEVTYPE}=="disk", DEVPATH!="*/virtual/*", IMPORT{builtin}="path_id"
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ENV{DEVTYPE}=="disk", SUBSYSTEMS=="nvme-subsystem", IMPORT{builtin}="path_id"
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KERNEL=="mmcblk[0-9]boot[0-9]", ENV{DEVTYPE}=="disk", ENV{ID_PATH}=="?*", SYMLINK+="disk/by-path/$env{ID_PATH}-boot%n"
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KERNEL!="mmcblk[0-9]boot[0-9]", ENV{DEVTYPE}=="disk", ENV{ID_PATH}=="?*", SYMLINK+="disk/by-path/$env{ID_PATH}"
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ENV{DEVTYPE}=="partition", ENV{ID_PATH}=="?*", SYMLINK+="disk/by-path/$env{ID_PATH}-part%n"
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# compatible links for ATA devices
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KERNEL!="mmcblk[0-9]boot[0-9]", ENV{DEVTYPE}=="disk", ENV{ID_PATH_ATA_COMPAT}=="?*", SYMLINK+="disk/by-path/$env{ID_PATH_ATA_COMPAT}"
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ENV{DEVTYPE}=="partition", ENV{ID_PATH_ATA_COMPAT}=="?*", SYMLINK+="disk/by-path/$env{ID_PATH_ATA_COMPAT}-part%n"
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KERNEL=="mmcblk[0-9]boot[0-9]", ENV{DEVTYPE}=="disk", ENV{ID_PATH}=="?*", SYMLINK+="disk/by-path/$env{ID_PATH}-boot%n"
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KERNEL=="mmcblk[0-9]boot[0-9]", ENV{DEVTYPE}=="disk", ENV{ID_PATH_WITH_USB_REVISION}=="?*", SYMLINK+="disk/by-path/$env{ID_PATH_WITH_USB_REVISION}-boot%n"
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KERNEL!="mmcblk[0-9]boot[0-9]", ENV{DEVTYPE}=="disk", ENV{ID_PATH}=="?*", SYMLINK+="disk/by-path/$env{ID_PATH}"
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KERNEL!="mmcblk[0-9]boot[0-9]", ENV{DEVTYPE}=="disk", ENV{ID_PATH_ATA_COMPAT}=="?*", SYMLINK+="disk/by-path/$env{ID_PATH_ATA_COMPAT}"
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KERNEL!="mmcblk[0-9]boot[0-9]", ENV{DEVTYPE}=="disk", ENV{ID_PATH_WITH_USB_REVISION}=="?*", SYMLINK+="disk/by-path/$env{ID_PATH_WITH_USB_REVISION}"
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ENV{DEVTYPE}=="partition", ENV{ID_PATH}=="?*", SYMLINK+="disk/by-path/$env{ID_PATH}-part%n"
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ENV{DEVTYPE}=="partition", ENV{ID_PATH_ATA_COMPAT}=="?*", SYMLINK+="disk/by-path/$env{ID_PATH_ATA_COMPAT}-part%n"
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ENV{DEVTYPE}=="partition", ENV{ID_PATH_WITH_USB_REVISION}=="?*", SYMLINK+="disk/by-path/$env{ID_PATH_WITH_USB_REVISION}-part%n"
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# legacy virtio-pci by-path links (deprecated)
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KERNEL=="vd*[!0-9]", ENV{ID_PATH}=="pci-*", SYMLINK+="disk/by-path/virtio-$env{ID_PATH}"
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KERNEL=="vd*[0-9]", ENV{ID_PATH}=="pci-*", SYMLINK+="disk/by-path/virtio-$env{ID_PATH}-part%n"
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KERNEL=="vd*[!0-9]", ENV{ID_PATH}=="pci-*", SYMLINK+="disk/by-path/virtio-$env{ID_PATH}"
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KERNEL=="vd*[!0-9]", ENV{ID_PATH_WITH_USB_REVISION}=="pci-*", SYMLINK+="disk/by-path/virtio-$env{ID_PATH_WITH_USB_REVISION}"
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KERNEL=="vd*[0-9]", ENV{ID_PATH}=="pci-*", SYMLINK+="disk/by-path/virtio-$env{ID_PATH}-part%n"
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KERNEL=="vd*[0-9]", ENV{ID_PATH_WITH_USB_REVISION}=="pci-*", SYMLINK+="disk/by-path/virtio-$env{ID_PATH_WITH_USB_REVISION}-part%n"
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{% if HAVE_BLKID %}
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# allow admin to disable probing the filesystem for slow devices like floppy disk drives
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@ -14,7 +14,9 @@ TEST!="index", GOTO="persistent_v4l_end"
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ATTR{index}!="?*", GOTO="persistent_v4l_end"
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IMPORT{builtin}="path_id"
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ENV{ID_PATH}=="?*", KERNEL=="video*|vbi*", SYMLINK+="v4l/by-path/$env{ID_PATH}-video-index$attr{index}"
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ENV{ID_PATH}=="?*", KERNEL=="audio*", SYMLINK+="v4l/by-path/$env{ID_PATH}-audio-index$attr{index}"
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KERNEL=="video*|vbi*", ENV{ID_PATH}=="?*", SYMLINK+="v4l/by-path/$env{ID_PATH}-video-index$attr{index}"
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KERNEL=="video*|vbi*", ENV{ID_PATH_WITH_USB_REVISION}=="?*", SYMLINK+="v4l/by-path/$env{ID_PATH_WITH_USB_REVISION}-video-index$attr{index}"
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KERNEL=="audio*", ENV{ID_PATH}=="?*", SYMLINK+="v4l/by-path/$env{ID_PATH}-audio-index$attr{index}"
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KERNEL=="audio*", ENV{ID_PATH_WITH_USB_REVISION}=="?*", SYMLINK+="v4l/by-path/$env{ID_PATH_WITH_USB_REVISION}-audio-index$attr{index}"
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LABEL="persistent_v4l_end"
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@ -14,8 +14,10 @@ KERNEL!="ttyUSB[0-9]*|ttyACM[0-9]*", GOTO="serial_end"
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SUBSYSTEMS=="usb-serial", ENV{.ID_PORT}="$attr{port_number}"
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IMPORT{builtin}="path_id"
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ENV{ID_PATH}=="?*", ENV{.ID_PORT}=="", SYMLINK+="serial/by-path/$env{ID_PATH}"
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ENV{ID_PATH}=="?*", ENV{.ID_PORT}=="?*", SYMLINK+="serial/by-path/$env{ID_PATH}-port$env{.ID_PORT}"
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ENV{ID_PATH}=="?*", ENV{.ID_PORT}=="", SYMLINK+="serial/by-path/$env{ID_PATH}"
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ENV{ID_PATH_WITH_USB_REVISION}=="?*", ENV{.ID_PORT}=="", SYMLINK+="serial/by-path/$env{ID_PATH_WITH_USB_REVISION}"
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ENV{ID_PATH}=="?*", ENV{.ID_PORT}=="?*", SYMLINK+="serial/by-path/$env{ID_PATH}-port$env{.ID_PORT}"
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ENV{ID_PATH_WITH_USB_REVISION}=="?*", ENV{.ID_PORT}=="?*", SYMLINK+="serial/by-path/$env{ID_PATH_WITH_USB_REVISION}-port$env{.ID_PORT}"
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ENV{ID_BUS}=="", GOTO="serial_end"
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ENV{ID_SERIAL}=="", GOTO="serial_end"
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@ -9,6 +9,7 @@
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#include <errno.h>
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#include <fcntl.h>
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#include <getopt.h>
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#include <linux/usb/ch11.h>
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#include <stdarg.h>
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#include <stdio.h>
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#include <unistd.h>
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@ -488,8 +489,51 @@ static void handle_scsi_tape(sd_device *dev, char **path) {
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path_prepend(path, "st%c", name[2]);
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}
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static int get_usb_revision(sd_device *dev) {
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uint8_t protocol;
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const char *s;
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int r;
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assert(dev);
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/* Returns usb revision 1, 2, or 3. */
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r = sd_device_get_sysattr_value(dev, "bDeviceProtocol", &s);
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if (r < 0)
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return r;
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r = safe_atou8_full(s, 16, &protocol);
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if (r < 0)
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return r;
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switch (protocol) {
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case USB_HUB_PR_HS_NO_TT: /* Full speed hub (USB1) or Hi-speed hub without TT (USB2) */
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/* See speed_show() in drivers/usb/core/sysfs.c of the kernel. */
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r = sd_device_get_sysattr_value(dev, "speed", &s);
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if (r < 0)
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return r;
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if (streq(s, "480"))
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return 2;
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return 1;
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case USB_HUB_PR_HS_SINGLE_TT: /* Hi-speed hub with single TT */
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case USB_HUB_PR_HS_MULTI_TT: /* Hi-speed hub with multiple TT */
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return 2;
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case USB_HUB_PR_SS: /* Super speed hub */
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return 3;
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default:
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return -EPROTONOSUPPORT;
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}
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}
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static sd_device *handle_usb(sd_device *parent, char **path) {
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const char *devtype, *str, *port;
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int r;
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if (sd_device_get_devtype(parent, &devtype) < 0)
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return parent;
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@ -503,12 +547,28 @@ static sd_device *handle_usb(sd_device *parent, char **path) {
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return parent;
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port++;
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/* USB host number may change across reboots (and probably even without reboot). The part after
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* USB host number is determined by device topology and so does not change. Hence, drop the
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* host number and always use '0' instead. */
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parent = skip_subsystem(parent, "usb");
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if (!parent)
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return NULL;
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path_prepend(path, "usb-0:%s", port);
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return skip_subsystem(parent, "usb");
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/* USB host number may change across reboots (and probably even without reboot). The part after USB
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* host number is determined by device topology and so does not change. Hence, drop the host number
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* and always use '0' instead.
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*
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* xHCI host controllers may register two (or more?) USB root hubs for USB 2.0 and USB 3.0, and the
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* sysname, whose host number replaced with 0, of a device under the hubs may conflict with others.
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* To avoid the conflict, let's include the USB revision of the root hub to the PATH_ID.
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* See issue https://github.com/systemd/systemd/issues/19406 for more details. */
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r = get_usb_revision(parent);
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if (r < 0) {
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log_device_debug_errno(parent, r, "Failed to get the USB revision number, ignoring: %m");
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path_prepend(path, "usb-0:%s", port);
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} else {
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assert(r > 0);
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path_prepend(path, "usbv%i-0:%s", r, port);
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}
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return parent;
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}
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static sd_device *handle_bcma(sd_device *parent, char **path) {
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@ -590,6 +650,32 @@ static int find_real_nvme_parent(sd_device *dev, sd_device **ret) {
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return 0;
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}
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static void add_id_with_usb_revision(sd_device *dev, bool test, char *path) {
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char *p;
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int r;
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assert(dev);
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assert(path);
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/* When the path contains the USB revision, let's adds ID_PATH_WITH_USB_REVISION property and
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* drop the version specifier for later use. */
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p = strstrafter(path, "-usbv");
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if (!p)
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return;
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if (!ascii_isdigit(p[0]))
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return;
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if (p[1] != '-')
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return;
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r = udev_builtin_add_property(dev, test, "ID_PATH_WITH_USB_REVISION", path);
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if (r < 0)
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log_device_debug_errno(dev, r, "Failed to add ID_PATH_WITH_USB_REVISION property, ignoring: %m");
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/* Drop the USB revision specifier for backward compatibility. */
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memmove(p - 1, p + 1, strlen(p + 1) + 1);
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}
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static void add_id_tag(sd_device *dev, bool test, const char *path) {
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char tag[UDEV_NAME_SIZE];
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size_t i = 0;
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@ -783,6 +869,8 @@ static int builtin_path_id(UdevEvent *event, int argc, char *argv[], bool test)
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!supported_transport)
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return -ENOENT;
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add_id_with_usb_revision(dev, test, path);
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r = udev_builtin_add_property(dev, test, "ID_PATH", path);
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if (r < 0)
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log_device_debug_errno(dev, r, "Failed to add ID_PATH property, ignoring: %m");
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