[Pkg-samba-maint] Bug#843153: Provide a means to wake-up (reconnect) an existing share

[martin f krafft]

Package: cifs-utils
Version: 2:6.6-1
Severity: wishlist

After a laptop suspend, SMB sessions are usually disconnected on the
server, and even the client will have a hard time just resuming.
This will either lead to soft-errors or hard-blocks, until on the
client, eventually, the kernel states

  kernel: [27763.247021] CIFS VFS: Server samba.example.org has not
  responded in 120 seconds. Reconnecting…

and reconnects.

One way around this is to lazy-umount the shares, and to remount
them, but that's not easily done with e.g. libpam-mount, and it also
doesn't solve the issue with open inodes.

I don't really want to shorten the 120 seconds (and I wouldn't know
how, there seems to be no mount option), but what would be great
would be a way to prod the share and make it wake-up (i.e.
reconnect), e.g.

  mount.cifs --resume -a

which would immediately cause a reconnection, not only after 120
seconds. This could then be executed by systemd for the resume
target…

-- System Information:
Debian Release: stretch/sid
  APT prefers unstable
  APT policy: (500, 'unstable'), (1, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 4.8.0-1-amd64 (SMP w/4 CPU cores)
Locale: LANG=en_NZ, LC_CTYPE=en_NZ.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages cifs-utils depends on:
ii  libc6         2.24-5
ii  libcap-ng0    0.7.7-3
ii  libkeyutils1  1.5.9-9
ii  libkrb5-3     1.14.3+dfsg-2
ii  libtalloc2    2.1.8-1
ii  libwbclient0  2:4.4.7+dfsg-1
ii  samba-common  2:4.4.7+dfsg-1

cifs-utils recommends no packages.

Versions of packages cifs-utils suggests:
pn  keyutils   <none>
pn  smbclient  <none>
pn  winbind    <none>

-- no debconf information


-- 
 .''`.   martin f. krafft <madduck at d.o> @martinkrafft
: :'  :  proud Debian developer
`. `'`   http://people.debian.org/~madduck
  `-  Debian - when you have better things to do than fixing systems
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