[PATCH v4 0/4] nbd: nbd fixes

[Pranay Kr. Srivastava]

This patch series fixes the following

1) cleanup nbd_set_socket
   Simple fixes to nbd_set_socket.

2) fix might_sleep warning on socket shutdown:
   Fix sock_shutdown to avoid calling kernel_sock_shutdown
   while holding spin_lock.

3) make nbd device wait for its users.
   When a timeout or error occurs then nbd driver simply kills
   the block device. Many filesystem(s) example ext2/ext3 don't
   expect their buffer heads to disappear like that. Fix this
   by making nbd device wait for its users.

   The same work function is used to trigger the kill_bdev as well
   do a sock_shutdown, depending on either a timeout/error occured
   or a disconnect was issued.

   Also avoid scheduling the work_fn in case a timeout for a request
   has already occured.

4) use i_size_write to assign nbd device size
   Instead of directly assigning nbd block device
   size, use i_size_write for modification.

Pranay Kr. Srivastava (4):
  cleanup nbd_set_socket
  fix might_sleep warning on socket shutdown
  make nbd device wait for its users
  use i_size_write to assign nbd device size

 drivers/block/nbd.c | 168 ++++++++++++++++++++++++++++++++++++++--------------
 1 file changed, 123 insertions(+), 45 deletions(-)

Changelog:

*) Rebased all patches above on git://git.pengutronix.de/git/mpa/linux-nbd.git,
   commit:7ed71a8704eda7b75fbd0ed73fd0a5b6e469d250

*) Formatting issues, and removed unnecessary code.

*) Splitted the patch to wait for users to create a new patch
   4) use i_size_write to assign nbd device size

-- 
1.9.1