cifs: make sure that channel scaling is done only once

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Following a successful cifs_tree_connect, we have the code
to scale up/down the number of channels in the session.
However, it is not protected by a lock today.

As a result, this code can be executed by several processes
that select the same channel. The core functions handle this
well, as they pick chan_lock. However, we've seen cases where
smb2_reconnect throws some warnings.

To fix that, this change introduces a flags bitmap inside the
cifs_ses structure. A new flag type is used to ensure that
only one process enters this section at any time.

Signed-off-by: Shyam Prasad N <sprasad@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

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Shyam Prasad N 2024-01-29 13:58:13 +00:00 • committed by Steve French

parent 41bccc98fb

commit ee36a3b345

2 changed files with 20 additions and 3 deletions

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3

fs/smb/client/cifsglob.h

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20

fs/smb/client/smb2pdu.c

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