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From: Dai Ngo <dai.ngo@oracle.com>
To: chuck.lever@oracle.com, jlayton@kernel.org
Cc: linux-nfs@vger.kernel.org, linux-fsdevel@vger.kernel.org
Subject: [PATCH 0/4] NFSD: add support for NFSv4 write delegation
Date: Thu, 11 May 2023 14:42:59 -0700
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|
| Series |
NFSD: add support for NFSv4 write delegation
|
expand
|
The NFSv4 server currently supports read delegation using VFS lease which is implemented using file_lock. This patch series add write delegation support for NFSv4 server by: . remove the check for F_WRLCK in generic_add_lease to allow file_lock to be used for write delegation. . grant write delegation for OPEN with NFS4_SHARE_ACCESS_WRITE if there is no conflict with other OPENs. . add XDR support for sending and receiving CB_GETATTR. . handle GETATTR from another client on a file that has outstanding write delegation by using CB_GETATTR to get the latest change_info and size for the GETATTR reply. Write delegation conflict with another OPEN, REMOVE, RENAME and SETATTR are handled the same as read delegation using notify_change, try_break_deleg.