tree b0f65718c502dd46da93887942eacbe35ecfe9aa
parent 1c0fe134311f3715de8760f63b3dd4d0d2ee092c
author Willy Tu <wltu@google.com> 1631243196 -0700
committer Willy Tu <wltu@google.com> 1631255108 -0700

updater: Cleanup Active blob to support multiple stages

Without the change, the update will fail due to existing active blob.
```
./burn_my_bmc --command update --interface ipmipci  \
  --image test.txt --sig test.txt --type bios
Sending over the firmware image.
sendFile with /flash/bios and test.txt
Opening the cleanup blob
Committing to the cleanup blob
Closing cleanup blob
Exception received: blob exception received: Received IPMI_CC: 255
```

With the Change, it will delete the active blob to continue the update.
```
./burn_my_bmc --command update --interface ipmipci  \
  --image test.txt --sig test.txt --type bios
Found an active blob, deleting /flash/active/image
Opening the cleanup blob
Committing to the cleanup blob
Closing cleanup blob
Committing to the cleanup blob
Closing cleanup blob
Sending over the firmware image.
sendFile with /flash/bios and test.txt
000Find [0x1050 0x750]
bar0[0x90100000]
Progress: 100.00%
001Sending over the hash file.
sendFile with /flash/hash and test.txt
000Find [0x1050 0x750]
bar0[0x90100000]
Progress: 100.00%
001Opening the verification file
Committing to /flash/verify to trigger service
Calling stat on /flash/verify session to check status
running
running
failed
Returned non-success (could still be running (unlikely))
failed
Opening the cleanup blob
Committing to the cleanup blob
Closing cleanup blob
Exception received: Verification failed
```

Signed-off-by: Willy Tu <wltu@google.com>
Change-Id: I46a802c7faece60a9b5354db47860e796af99107