Re: How to get Btrfs on 2nd partition of USB HDD to automount as read/write

On Tue, 21 Aug 2012 11:36:32 -0400 David Sterba [off-list ref] 
wrote:

On Sun, Aug 19, 2012 at 03:05:11PM -0500, C Anthony Risinger 
wrote:

quoted

On Sun, Aug 19, 2012 at 2:51 PM, dg1727 [off-list ref] 
wrote:

quoted

permissions of the directories in /dev are drwx------ for the 
NTFS and dr-xr-xr-x for the Btrfs.

How can the OS be set up so that the Btrfs will automount
read/write?

try:

chmod u+w /path/to/btrfs/mount

... for whatever reason mkfs.btrfs created new subvolumes (but 
not snapshots!) with 555 perms, which essentially says "writable 
to nobody at all" ... IIRC, this was changed within the last 
year or so.

The issue with subvols pemr 0700 was indeed fixed, on the kernel 
side.

The problem with missing 'w' (ie mode 555) on a freshly mkfs'ed 
image is still present and it's the user-space tools (mkfs) 
proble. Patch has been sent some time ago

http://www.spinics.net/lists/linux-btrfs/msg17909.html

The workaround is to chmod as you suggested and is permanent once 
done.

Thanks a lot for these answers.  As an exercise, how would I track 
that patch so I can tell when it has been released?  Pointing me to 
a webpage that covers this would be fine.  

-dg1727