Hi,
When I tested xfstest/generic/426 with NFSv4.0, it failed..
The test steps are as follows:
1. Use name_to_handle_at() to change the filename to filehandle.
2. Execute "echo 3 > /proc/sys/vm/drop_caches".
3. Use open_by_handle_at() to open files with the filehandle created
bystep 1.
Step 3 calls nfs_fh_to_dentry() to convert the filehandle to dentry.
But because the inode and dentry cache information was deleted in step
2, a new inode is generated using the nfs_fhget().
And then a new dentry is generated using the d_obtain_alias().
However, during the call to the d_obtain_alias() function, the d_iname
of the dentry is assigned the slash_name"/".
Nfsd will check the dentry's d_iname, when open claim type is
NFS4_OPEN_CLAIM_NULL.
So when dentry's d_inameis "/", it fails with the error "nfserr_badname"
So I want to know why the newly created dentry is named "/",
and when using open_by_handle_at() to open a file, is it possible to set
the claim type to NFS4_OPEN_CLAIM_PREVIOUS ?
Thanks,
cuiyue
