Populate post_op_attr with updated attributes after commit.

Signed-off-by: Srikrishan Malik <srimalik@in.ibm.com>
Need content lock in write mode for open/close

Signed-off-by: Venkateswararao Jujjuri "<jvrao@linux.vnet.ibm.com>
Signed-off-by: Rong zeng <rongzeng@us.ibm.com>
Test for AIX sendreply error
Fix hardcoded NFS4ERR_ACCESS return code in nfs4_op_open/nfs41_op_open.

Signed-off-by: rong zeng <rongzeng@us.ibm.com>
Fix deadlock due to lock ordering.
Release content lock before calling cache_inode_rdwr.

Signed-off-by: Rong Zeng <rongzeng@us.ibm.com>
Signed-off-by: Venkateswararao Jujjuri "<jvrao@linux.vnet.ibm.com>
Signed-off-by: Srikrishan Malik <srimalik@in.ibm.com>