Commits on Jul 30, 2024

1. fix(dracut-functions.sh): skip dir in get_persistent_dev() …

   I observed the following directory layout under /dev/disk/by-path:
   
   /dev/disk/by-path/
   ├── pci-0000:00:07.0 -> ../../vda
   ├── pci-0000:00:07.0-part
   │   ├── by-partnum
   │   │   ├── 1 -> ../../../../vda1
   │   │   ├── 2 -> ../../../../vda2
   │   │   └── 3 -> ../../../../vda3
   │   ├── by-partuuid
   │   │   ├── 102645f0-b6a7-47d5-93ae-60bd063ecbc5 -> ../../../../vda1
   │   │   ├── 32dc3e8a-70cb-4afb-8642-d4f2e0a92941 -> ../../../../vda3
   │   │   └── 46beb739-55c1-4746-ab90-b329a0c82ea5 -> ../../../../vda2
   │   └── by-uuid
   │       └── 11ea5cf3-7132-40d4-a114-a8d76edca51f -> ../../../../vda2
   ├── pci-0000:00:07.0-part1 -> ../../vda1
   ├── pci-0000:00:07.0-part2 -> ../../vda2
   ├── pci-0000:00:07.0-part3 -> ../../vda3
   ├── virtio-pci-0000:00:07.0 -> ../../vda
   ├── virtio-pci-0000:00:07.0-part1 -> ../../vda1
   ├── virtio-pci-0000:00:07.0-part2 -> ../../vda2
   └── virtio-pci-0000:00:07.0-part3 -> ../../vda3
   
   As showed above, 'pci-0000:00:07.0-part' is a directory, so
   get_maj_min() returns '0:0' for it.
   
   This will raise an issue in the case that kdump dumps the vmcore through
   nfs. In that case, no block device is passed to
   get_persistent_dev(), so _dev=$(get_maj_min "$1") also equals '0:0'.
   Finally, it wrongly fits into the match:
           if [ "$_tmp" = "$_dev" ]; then
               printf -- "%s" "$i"
               return
           fi
   
   And kdump kernel boots up and wait for 'pci-0000:00:07.0-part'
   indefinitely.
   
   Signed-off-by: Pingfan Liu <[email protected]>

   Pingfan Liu committed Jul 30, 2024
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