xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

NFSv4: Try to return the delegation immediately when marked for return on close

Browse Source 
Add a routine to return the delegation immediately upon close of the
file if it was marked for return-on-close.

Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
This commit is contained in:
Trond Myklebust
2020-01-27 09:58:17 -05:00
committed by Anna Schumaker
parent 0d10416797
commit b7b7dac684
3 changed files with 35 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

33
fs/nfs/delegation.c
View File

@@ -639,6 +639,39 @@ int nfs4_inode_return_delegation(struct inode *inode)
return err;
}
/**
* nfs_inode_return_delegation_on_close - asynchronously return a delegation
* @inode: inode to process
*
* This routine is called on file close in order to determine if the
* inode delegation needs to be returned immediately.
*/
void nfs4_inode_return_delegation_on_close(struct inode *inode)
{
struct nfs_delegation *delegation;
struct nfs_delegation *ret = NULL;
if (!inode)
return;
rcu_read_lock();
delegation = nfs4_get_valid_delegation(inode);
if (!delegation)
goto out;
if (test_bit(NFS_DELEGATION_RETURN_IF_CLOSED, &delegation->flags)) {
spin_lock(&delegation->lock);
if (delegation->inode &&
list_empty(&NFS_I(inode)->open_files) &&
!test_and_set_bit(NFS_DELEGATION_RETURNING, &delegation->flags)) {
clear_bit(NFS_DELEGATION_RETURN_IF_CLOSED, &delegation->flags);
ret = delegation;
}
spin_unlock(&delegation->lock);
}
out:
rcu_read_unlock();
nfs_end_delegation_return(inode, ret, 0);
}
/**
* nfs4_inode_make_writeable
* @inode: pointer to inode