Dolphin does not open/read .directory file on fuse.

[Stef Bon]

Hi,

I'm working on a fuse fs which provides browsing sftp folders on ssh
servers, found with avahi.
One feature what I would like to be enabled is making a folder which
represents a server, also looks like a server. Therefore my fuse fs
provides access to .directory files in the "server" directory which
are read by dolphin and should enable a custom icon, for example:

$ cat /run/fs-workspace/user/sbon/network/SFTP\
Network/bononline.nl/alarm/.directory
[Desktop Entry]
Icon=/usr/share/icons/Adwaita/256x256/places/network-server.png
Type=Service

Now this .directory file is not read by dolphin, while the exact same
file in /home/sbon/Temp is.

i've enabled debugging of the most important kio slaves and did a
strace, first on the /home/sbon/Temp folder, and then a strace on the
/run/fs-workspace/user/sbon/network/SFTP\ Network/bononline.nl/alarm
folder:

$strace -P "/home/sbon/Temp" -P "/home/sbon/Temp/.directory" dolphin

gave me info like:

statfs("/home/sbon/Temp", {f_type=EXT2_SUPER_MAGIC, f_bsize=4096,
f_blocks=18132350, f_bfree=7429012, f_bavail=6569973, f_files=4611264,
f_ffree=3602197, f_fsid={val=[2512731478, 3774267412]}, f_namelen=255,
f_frsize=4096, f_flags=ST_VALID|ST_NOATIME}) = 0
stat("/home/sbon/Temp", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
lstat("/home/sbon/Temp", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
lstat("/home/sbon/Temp/.directory", {st_mode=S_IFREG|0644, st_size=93, ...}) = 0
stat("/home/sbon/Temp/.directory", {st_mode=S_IFREG|0644, st_size=93, ...}) = 0
lstat("/home/sbon/Temp", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
lstat("/home/sbon/Temp/.directory", {st_mode=S_IFREG|0644, st_size=93, ...}) = 0
stat("/home/sbon/Temp/.directory", {st_mode=S_IFREG|0644, st_size=93, ...}) = 0
access("/home/sbon/Temp/.directory", W_OK) = 0
stat("/home/sbon/Temp/.directory", {st_mode=S_IFREG|0644, st_size=93, ...}) = 0
open("/home/sbon/Temp/.directory", O_RDONLY|O_CLOEXEC) = 26
fcntl(26, F_SETFD, FD_CLOEXEC)          = 0
fstat(26, {st_mode=S_IFREG|0644, st_size=93, ...}) = 0
fstat(26, {st_mode=S_IFREG|0644, st_size=93, ...}) = 0
fstat(26, {st_mode=S_IFREG|0644, st_size=93, ...}) = 0
read(26, "[Desktop Entry]\nIcon=/usr/share/"..., 16384) = 93
read(26, "", 16291)                     = 0
close(26)                               = 0

Obvious the file is read.
Now:

$strace -P "/run/fs-workspace/user/sbon/network/SFTP
Network/bononline.nl/alarm/" -P
"/run/fs-workspace/user/sbon/network/SFTP
Network/bononline.nl/alarm/.directory" dolphin

gave me:

statfs("/run/fs-workspace/user/sbon/network/SFTP
Network/bononline.nl/alarm", {f_type=FUSE_SUPER_MAGIC, f_bsize=4096,
f_blocks=18132350, f_bfree=7472874, f_bavail=6613835, f_files=49,
f_ffree=4294967246, f_fsid={val=[0, 0]}, f_namelen=255, f_frsize=4096,
f_flags=ST_VALID|ST_NOSUID|ST_NODEV|ST_NOEXEC|ST_NOATIME}) = 0
stat("/run/fs-workspace/user/sbon/network/SFTP
Network/bononline.nl/alarm", {st_mode=S_IFDIR|0755, st_size=0, ...}) =
0
access("/run/fs-workspace/user/sbon/network/SFTP
Network/bononline.nl/alarm", W_OK) = 0
access("/run/fs-workspace/user/sbon/network/SFTP
Network/bononline.nl/alarm", W_OK) = 0
stat("/run/fs-workspace/user/sbon/network/SFTP
Network/bononline.nl/alarm/.directory", {st_mode=S_IFREG|0644,
st_size=93, ...}) = 0
access("/run/fs-workspace/user/sbon/network/SFTP
Network/bononline.nl/alarm/.directory", R_OK) = 0
access("/run/fs-workspace/user/sbon/network/SFTP
Network/bononline.nl/alarm/.directory", W_OK) = 0
lstat("/run/fs-workspace/user/sbon/network/SFTP
Network/bononline.nl/alarm", {st_mode=S_IFDIR|0755, st_size=0, ...}) =
0

The .directory file is detected, but not opened (and nowhere futher in
the output).
What causes this? Is it the lack of f_sid (value in statfs) for the
fuse fs, or is it the directory sizes (first example they are 4096,
with fuse they are 0)?

Stef Bon