On Wed, Jul 30, 2014 at 05:39:41PM +0400, Michael Tokarev wrote:
> 23.07.2014 01:11, Bastian Blank wrote:
> > The local 9p support supports readdir. It does not translate the value
> > of d_type, so the guest always sees a regular file, even in a lstat call
> > describes it correctly as symlink.
> I'm not sure what do you mean by "translate". It passes d_type from host.
> And it works in guest as is. Including ldconfig and other stuff. In
> particular, d_type is 8 for regular files in guest, 10 for symlinks and
> 4 for directories.
The 9p host code uses extended attributes to save the type:
| $ stat ld-linux-x86-64.so.2
| File: ‘ld-linux-x86-64.so.2’
| Size: 32 Blocks: 8 IO Block: 4096 regular file
| Device: 33h/51d Inode: 84315 Links: 1
| Access: (0600/-rw-------) Uid: ( 1000/ bastian) Gid: ( 1000/ bastian)
[...]
| $ getfattr -d -e hex ld-linux-x86-64.so.2
| # file: ld-linux-x86-64.so.2
| user.virtfs.gid=0x00000000
| user.virtfs.mode=0xffa10000
| user.virtfs.uid=0x00000000
| $ hexdump -C ld-linux-x86-64.so.2
| 00000000 2f 6c 69 62 2f 78 38 36 5f 36 34 2d 6c 69 6e 75 |/lib/x86_64-linu|
| 00000010 78 2d 67 6e 75 2f 6c 64 2d 32 2e 31 39 2e 73 6f |x-gnu/ld-2.19.so|
There is nothing in the host readdir implementation that handles this
extra type information.
Bastian
--
The sight of death frightens them [Earthers].
-- Kras the Klingon, "Friday's Child", stardate 3497.2
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