Hi all,

Does Linux NFS server disallow OPENs from SMB or local filesystem when a DENY_READ/DENY_WRITE (share reservation) is set on a file? If so, how is it implemented (with VFS flags)?

The packet captures show that the Linux NFS4x clients always OPEN with DENY_NONE (as there is no POSIX support for DENY_READ/DENY_WRITE). Looked at https://linux-nfs.org/wiki/index.php/Cluster_Coherent_NFSv4_and_Share_Reservations but was not sure if it uptodate. 

Would like to understand what level of share reservations support is present in Linux NFS server today.

Thanks,
Suresh