[Shinano][Aries] USB mass storage is not working

RESOLVED FIXED in 2.2 S10 (17apr)


4 years ago
4 years ago


(Reporter: gerard-majax, Assigned: gerard-majax)


2.2 S10 (17apr)
Gonk (Firefox OS)

Firefox Tracking Flags

(Not tracked)


(Whiteboard: [systemsfe])


(1 attachment)



4 years ago
 0. Enable USB Sharing with UMS

 The sdcard is exported via UMS

 Nothing happens

Comment 1

4 years ago
We first need to add "mass_storage" to |persist.sys.usb.config|. Then I have the feature working (a /dev/sdb is exposed to the computer) but it's not sharing anything.

Comment 2

4 years ago
(In reply to Alexandre LISSY :gerard-majax from comment #1)
> We first need to add "mass_storage" to |persist.sys.usb.config|. Then I have
> the feature working (a /dev/sdb is exposed to the computer) but it's not
> sharing anything.

And that works. My profile comes from previous devices. Code from AutoMounterSetting checks against the Settings API whether we have a specific volume allowed for UMS.

This is being checked at https://hg.mozilla.org/mozilla-central/annotate/ab0490972e1e/dom/system/gonk/AutoMounterSetting.cpp#l265

So it turns out my device previously had volumes named "sdcard", "extsdcard" and "external", while my new one has "sdcard", "sdcard1" and "usbdisk". So of course, the settings were:
 - ums.volume.sdcard.enabled: true
 - ums.volume.extsdcard.enabled: true
 - ums.volume.external.enabled: true

While it should have been:
 - ums.volume.sdcard.enabled: true
 - ums.volume.sdcard1.enabled: true
 - ums.volume.usbdisk.enabled: true

Once this is fixed, and with the appropriate persist value, then USB Mass Storage works. Only for the "sdcard1" volume of course.

Comment 3

4 years ago
Created attachment 8589059 [details] [review]
Shinano common PR
Attachment #8589059 - Flags: review?(mwu)


4 years ago
Attachment #8589059 - Flags: review?(mwu) → review?(dhylands)

Comment 4

4 years ago
Should we also treat this as a migration issue? All my devices where I put a profile coming from a previous device expose the same issue: they lack the settings keys.
Flags: needinfo?(dhylands)
This is further complicated by the fact that you used to be able to set the individual volume controls in the settings app, but this was removed a while back.

I think that a reasonable way forward is that the preference should default to true if it doesn't exist.
Flags: needinfo?(dhylands)
Comment on attachment 8589059 [details] [review]
Shinano common PR

Looks good to me.
Attachment #8589059 - Flags: review?(dhylands) → review+

Comment 7

4 years ago
Last Resolved: 4 years ago
Resolution: --- → FIXED
Whiteboard: [systemsfe]
Target Milestone: --- → 2.2 S10 (17apr)
Blocks: 1162197
No longer blocks: 1111748
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