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7786d56db8
New API: list-disk-labels Allow the user to pass an optional disk label when adding a drive. This is passed through to qemu / libvirt using the disk serial field, and from there to the appliance which exposes it through udev, creating a special alias of the device /dev/disk/guestfs/<label>. Partitions are named /dev/disk/guestfs/<label><partnum>. virtio-blk and virtio-scsi limit the serial field to 20 bytes. We further limit the name to maximum 20 ASCII characters in [a-zA-Z]. list-devices and list-partitions are not changed: these calls still return raw block device names. However a new call, list-disk-labels, returns a hash table allowing callers to map between disk labels, and block device and partition names. This commit also includes a test.
18 lines
798 B
Plaintext
18 lines
798 B
Plaintext
# For libguestfs, create /dev/disk/guestfs/<serial>
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# and /dev/disk/guestfs/<serial><partnum>
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KERNEL=="sd*[!0-9]", ENV{DEVTYPE}=="disk", ENV{ID_SCSI_SERIAL}=="?*", \
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SYMLINK+="disk/guestfs/$env{ID_SCSI_SERIAL}"
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KERNEL=="sd*", ENV{DEVTYPE}=="partition", ENV{ID_SCSI_SERIAL}=="?*", \
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SYMLINK+="disk/guestfs/$env{ID_SCSI_SERIAL}%n"
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# As written, it's likely the above only works with virtio-scsi
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# because ID_SCSI_SERIAL is specific to the output of the 'scsi_id'
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# program. The following will not work because ID_SERIAL contains
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# some unwanted text.
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#KERNEL=="vd*[!0-9]", ATTRS{serial}=="?*", ENV{ID_SERIAL}="$attr{serial}", \
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# SYMLINK+="disk/guestfs/$env{ID_SERIAL}"
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#KERNEL=="vd*[0-9]", ATTRS{serial}=="?*", ENV{ID_SERIAL}="$attr{serial}", \
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# SYMLINK+="disk/guestfs/$env{ID_SERIAL}%n"
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