Just as disks can have nested partitions, the same happens with cd devices,
so we need to detect device paths and make sure we will not mix the handles.
To address this:
we fetch handle array and create linked list of block devices.
we walk the list and detect parent devices and set children pd_parent.
for {fd, cd, hd}, we walk device list and pick up our devices and store to
corresponding list. We make sure we store parent device first.
For sorting we use 3 steps: We check for floppy, we check for cd and then
everything else must be hd.
In general, it seems the floppy devices have no parent.
CD can have both parents and children (multiple boot entries, partitions
from the hybrid disk image).
Tested by: cross+freebsd@distal.com on Cisco UCS systems, C200 series (C220M5, C240M4).
Also on MBP with UEFI 1.10
Reported by: Chriss Ross
MFC after: 1w
Differential Revision: https://reviews.freebsd.org/D22553
UEFI 1.10 on macs does not seem to provide devpath to name translation,
provide our own (limited) version, so we can get information about commmon
devices.
MFC after: 1 week
The HandleProtocol() is deprecated interface and we should use OpenProtocol()
instead. Moreover, in some firmware implementation(s), the HandleProtocol()
does return device path using static storage, so we can not keep the value
returned there. With same firmware, the OpenProtocol() does return data we
do not need to clone.
Reviewed by: imp
Differential Revision: https://reviews.freebsd.org/D21162
This is like efi_devpath_match, but allows differing device media
paths. Those just specify the partition information.
Differential Revision: https://reviews.freebsd.org/D20513
In anticipation of new functionality, create routines to convert char *
and a CHAR16 * to a EFI_DEVICE_PATH
EFI_DEVICE_PATH *efi_name_to_devpath(const char *path);
EFI_DEVICE_PATH *efi_name_to_devpath16(CHAR16 *path);
void efi_devpath_free(EFI_DEVICE_PATH *dp);
The first two return an EFI_DEVICE_PATH for the passed in paths. The
third frees up the storage the first two return when the caller is
done with it.
Differential Revision: https://reviews.freebsd.org/D19971
Returns true if the first node pointed to by devpath1 is identical to
the first node pointed to by devpath2, with care taken to not read
past the end of the valid parts of either devpath1 or
devpath2. Otherwise, returns false.
Sponsored by: Netflix
Takes a generic device path as its input. Scans through it to find the
first media_path node in it and returns a pointer to it. If none is
found, NULL is returned.
Sponsored by: Netflix
