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@ -40,11 +40,23 @@ static void nfs_free_delegation(struct nfs_delegation *delegation)
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call_rcu(&delegation->rcu, nfs_free_delegation_callback);
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}
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/**
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* nfs_mark_delegation_referenced - set delegation's REFERENCED flag
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* @delegation: delegation to process
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*
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*/
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void nfs_mark_delegation_referenced(struct nfs_delegation *delegation)
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{
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set_bit(NFS_DELEGATION_REFERENCED, &delegation->flags);
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}
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/**
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* nfs_have_delegation - check if inode has a delegation
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* @inode: inode to check
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* @flags: delegation types to check for
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*
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* Returns one if inode has the indicated delegation, otherwise zero.
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*/
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int nfs_have_delegation(struct inode *inode, fmode_t flags)
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{
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struct nfs_delegation *delegation;
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@ -119,10 +131,15 @@ again:
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return 0;
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}
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/*
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* Set up a delegation on an inode
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/**
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* nfs_inode_reclaim_delegation - process a delegation reclaim request
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* @inode: inode to process
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* @cred: credential to use for request
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* @res: new delegation state from server
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*
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*/
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void nfs_inode_reclaim_delegation(struct inode *inode, struct rpc_cred *cred, struct nfs_openres *res)
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void nfs_inode_reclaim_delegation(struct inode *inode, struct rpc_cred *cred,
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struct nfs_openres *res)
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{
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struct nfs_delegation *delegation;
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struct rpc_cred *oldcred = NULL;
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@ -177,11 +194,11 @@ static struct inode *nfs_delegation_grab_inode(struct nfs_delegation *delegation
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static struct nfs_delegation *
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nfs_detach_delegation_locked(struct nfs_inode *nfsi,
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struct nfs_client *clp)
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struct nfs_server *server)
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{
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struct nfs_delegation *delegation =
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rcu_dereference_protected(nfsi->delegation,
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lockdep_is_held(&clp->cl_lock));
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lockdep_is_held(&server->nfs_client->cl_lock));
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if (delegation == NULL)
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goto nomatch;
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@ -198,22 +215,29 @@ nomatch:
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}
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static struct nfs_delegation *nfs_detach_delegation(struct nfs_inode *nfsi,
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struct nfs_client *clp)
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struct nfs_server *server)
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{
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struct nfs_client *clp = server->nfs_client;
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struct nfs_delegation *delegation;
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spin_lock(&clp->cl_lock);
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delegation = nfs_detach_delegation_locked(nfsi, clp);
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delegation = nfs_detach_delegation_locked(nfsi, server);
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spin_unlock(&clp->cl_lock);
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return delegation;
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}
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/*
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* Set up a delegation on an inode
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/**
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* nfs_inode_set_delegation - set up a delegation on an inode
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* @inode: inode to which delegation applies
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* @cred: cred to use for subsequent delegation processing
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* @res: new delegation state from server
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*
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* Returns zero on success, or a negative errno value.
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*/
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int nfs_inode_set_delegation(struct inode *inode, struct rpc_cred *cred, struct nfs_openres *res)
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{
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struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
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struct nfs_server *server = NFS_SERVER(inode);
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struct nfs_client *clp = server->nfs_client;
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struct nfs_inode *nfsi = NFS_I(inode);
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struct nfs_delegation *delegation, *old_delegation;
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struct nfs_delegation *freeme = NULL;
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@ -234,7 +258,7 @@ int nfs_inode_set_delegation(struct inode *inode, struct rpc_cred *cred, struct
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spin_lock(&clp->cl_lock);
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old_delegation = rcu_dereference_protected(nfsi->delegation,
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lockdep_is_held(&clp->cl_lock));
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lockdep_is_held(&clp->cl_lock));
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if (old_delegation != NULL) {
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if (memcmp(&delegation->stateid, &old_delegation->stateid,
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sizeof(old_delegation->stateid)) == 0 &&
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@ -253,9 +277,9 @@ int nfs_inode_set_delegation(struct inode *inode, struct rpc_cred *cred, struct
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delegation = NULL;
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goto out;
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}
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freeme = nfs_detach_delegation_locked(nfsi, clp);
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freeme = nfs_detach_delegation_locked(nfsi, server);
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}
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list_add_rcu(&delegation->super_list, &clp->cl_delegations);
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list_add_rcu(&delegation->super_list, &server->delegations);
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nfsi->delegation_state = delegation->type;
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rcu_assign_pointer(nfsi->delegation, delegation);
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delegation = NULL;
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@ -297,67 +321,85 @@ out:
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return err;
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|
}
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/*
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* Return all delegations that have been marked for return
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/**
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* nfs_client_return_marked_delegations - return previously marked delegations
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* @clp: nfs_client to process
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*
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* Returns zero on success, or a negative errno value.
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|
*/
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|
int nfs_client_return_marked_delegations(struct nfs_client *clp)
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{
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struct nfs_delegation *delegation;
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struct nfs_server *server;
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struct inode *inode;
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int err = 0;
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restart:
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rcu_read_lock();
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list_for_each_entry_rcu(delegation, &clp->cl_delegations, super_list) {
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if (!test_and_clear_bit(NFS_DELEGATION_RETURN, &delegation->flags))
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continue;
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inode = nfs_delegation_grab_inode(delegation);
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if (inode == NULL)
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continue;
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delegation = nfs_detach_delegation(NFS_I(inode), clp);
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rcu_read_unlock();
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if (delegation != NULL) {
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filemap_flush(inode->i_mapping);
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err = __nfs_inode_return_delegation(inode, delegation, 0);
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list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) {
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list_for_each_entry_rcu(delegation, &server->delegations,
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super_list) {
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if (!test_and_clear_bit(NFS_DELEGATION_RETURN,
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&delegation->flags))
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continue;
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inode = nfs_delegation_grab_inode(delegation);
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if (inode == NULL)
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continue;
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delegation = nfs_detach_delegation(NFS_I(inode),
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server);
|
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|
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rcu_read_unlock();
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if (delegation != NULL) {
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|
filemap_flush(inode->i_mapping);
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err = __nfs_inode_return_delegation(inode,
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delegation, 0);
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|
}
|
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|
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iput(inode);
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|
if (!err)
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|
goto restart;
|
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|
|
set_bit(NFS4CLNT_DELEGRETURN, &clp->cl_state);
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return err;
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}
|
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iput(inode);
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|
|
if (!err)
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|
goto restart;
|
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set_bit(NFS4CLNT_DELEGRETURN, &clp->cl_state);
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|
|
return err;
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}
|
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|
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rcu_read_unlock();
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|
return 0;
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|
}
|
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|
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/*
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* This function returns the delegation without reclaiming opens
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* or protecting against delegation reclaims.
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* It is therefore really only safe to be called from
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* nfs4_clear_inode()
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/**
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* nfs_inode_return_delegation_noreclaim - return delegation, don't reclaim opens
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* @inode: inode to process
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*
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* Does not protect against delegation reclaims, therefore really only safe
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* to be called from nfs4_clear_inode().
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*/
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|
void nfs_inode_return_delegation_noreclaim(struct inode *inode)
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{
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struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
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struct nfs_server *server = NFS_SERVER(inode);
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struct nfs_inode *nfsi = NFS_I(inode);
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struct nfs_delegation *delegation;
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if (rcu_access_pointer(nfsi->delegation) != NULL) {
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delegation = nfs_detach_delegation(nfsi, clp);
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delegation = nfs_detach_delegation(nfsi, server);
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if (delegation != NULL)
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nfs_do_return_delegation(inode, delegation, 0);
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}
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}
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|
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/**
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* nfs_inode_return_delegation - synchronously return a delegation
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* @inode: inode to process
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*
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* Returns zero on success, or a negative errno value.
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*/
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|
int nfs_inode_return_delegation(struct inode *inode)
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|
{
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|
|
struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
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struct nfs_server *server = NFS_SERVER(inode);
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struct nfs_inode *nfsi = NFS_I(inode);
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struct nfs_delegation *delegation;
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int err = 0;
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if (rcu_access_pointer(nfsi->delegation) != NULL) {
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delegation = nfs_detach_delegation(nfsi, clp);
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delegation = nfs_detach_delegation(nfsi, server);
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if (delegation != NULL) {
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nfs_wb_all(inode);
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err = __nfs_inode_return_delegation(inode, delegation, 1);
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|
@ -366,46 +408,61 @@ int nfs_inode_return_delegation(struct inode *inode)
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return err;
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}
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static void nfs_mark_return_delegation(struct nfs_client *clp, struct nfs_delegation *delegation)
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static void nfs_mark_return_delegation(struct nfs_delegation *delegation)
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{
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|
struct nfs_client *clp = NFS_SERVER(delegation->inode)->nfs_client;
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set_bit(NFS_DELEGATION_RETURN, &delegation->flags);
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set_bit(NFS4CLNT_DELEGRETURN, &clp->cl_state);
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}
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|
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/*
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|
|
* Return all delegations associated to a super block
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|
|
/**
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|
|
* nfs_super_return_all_delegations - return delegations for one superblock
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|
* @sb: sb to process
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|
*
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|
*/
|
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|
|
void nfs_super_return_all_delegations(struct super_block *sb)
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|
|
{
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|
|
|
struct nfs_client *clp = NFS_SB(sb)->nfs_client;
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|
struct nfs_server *server = NFS_SB(sb);
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|
|
struct nfs_client *clp = server->nfs_client;
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|
|
struct nfs_delegation *delegation;
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|
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if (clp == NULL)
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|
return;
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|
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|
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rcu_read_lock();
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|
|
list_for_each_entry_rcu(delegation, &clp->cl_delegations, super_list) {
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|
list_for_each_entry_rcu(delegation, &server->delegations, super_list) {
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|
|
|
spin_lock(&delegation->lock);
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|
|
|
if (delegation->inode != NULL && delegation->inode->i_sb == sb)
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|
|
set_bit(NFS_DELEGATION_RETURN, &delegation->flags);
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|
|
|
set_bit(NFS_DELEGATION_RETURN, &delegation->flags);
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|
|
|
spin_unlock(&delegation->lock);
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|
|
|
}
|
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|
|
|
rcu_read_unlock();
|
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|
|
|
|
|
|
|
|
if (nfs_client_return_marked_delegations(clp) != 0)
|
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|
|
|
nfs4_schedule_state_manager(clp);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static
|
|
|
|
|
void nfs_client_mark_return_all_delegation_types(struct nfs_client *clp, fmode_t flags)
|
|
|
|
|
static void nfs_mark_return_all_delegation_types(struct nfs_server *server,
|
|
|
|
|
fmode_t flags)
|
|
|
|
|
{
|
|
|
|
|
struct nfs_delegation *delegation;
|
|
|
|
|
|
|
|
|
|
rcu_read_lock();
|
|
|
|
|
list_for_each_entry_rcu(delegation, &clp->cl_delegations, super_list) {
|
|
|
|
|
list_for_each_entry_rcu(delegation, &server->delegations, super_list) {
|
|
|
|
|
if ((delegation->type == (FMODE_READ|FMODE_WRITE)) && !(flags & FMODE_WRITE))
|
|
|
|
|
continue;
|
|
|
|
|
if (delegation->type & flags)
|
|
|
|
|
nfs_mark_return_delegation(clp, delegation);
|
|
|
|
|
nfs_mark_return_delegation(delegation);
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void nfs_client_mark_return_all_delegation_types(struct nfs_client *clp,
|
|
|
|
|
fmode_t flags)
|
|
|
|
|
{
|
|
|
|
|
struct nfs_server *server;
|
|
|
|
|
|
|
|
|
|
rcu_read_lock();
|
|
|
|
|
list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link)
|
|
|
|
|
nfs_mark_return_all_delegation_types(server, flags);
|
|
|
|
|
rcu_read_unlock();
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
@ -420,19 +477,32 @@ static void nfs_delegation_run_state_manager(struct nfs_client *clp)
|
|
|
|
|
nfs4_schedule_state_manager(clp);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* nfs_expire_all_delegation_types
|
|
|
|
|
* @clp: client to process
|
|
|
|
|
* @flags: delegation types to expire
|
|
|
|
|
*
|
|
|
|
|
*/
|
|
|
|
|
void nfs_expire_all_delegation_types(struct nfs_client *clp, fmode_t flags)
|
|
|
|
|
{
|
|
|
|
|
nfs_client_mark_return_all_delegation_types(clp, flags);
|
|
|
|
|
nfs_delegation_run_state_manager(clp);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* nfs_expire_all_delegations
|
|
|
|
|
* @clp: client to process
|
|
|
|
|
*
|
|
|
|
|
*/
|
|
|
|
|
void nfs_expire_all_delegations(struct nfs_client *clp)
|
|
|
|
|
{
|
|
|
|
|
nfs_expire_all_delegation_types(clp, FMODE_READ|FMODE_WRITE);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* Return all delegations following an NFS4ERR_CB_PATH_DOWN error.
|
|
|
|
|
/**
|
|
|
|
|
* nfs_handle_cb_pathdown - return all delegations after NFS4ERR_CB_PATH_DOWN
|
|
|
|
|
* @clp: client to process
|
|
|
|
|
*
|
|
|
|
|
*/
|
|
|
|
|
void nfs_handle_cb_pathdown(struct nfs_client *clp)
|
|
|
|
|
{
|
|
|
|
@ -441,29 +511,43 @@ void nfs_handle_cb_pathdown(struct nfs_client *clp)
|
|
|
|
|
nfs_client_mark_return_all_delegations(clp);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void nfs_client_mark_return_unreferenced_delegations(struct nfs_client *clp)
|
|
|
|
|
static void nfs_mark_return_unreferenced_delegations(struct nfs_server *server)
|
|
|
|
|
{
|
|
|
|
|
struct nfs_delegation *delegation;
|
|
|
|
|
|
|
|
|
|
rcu_read_lock();
|
|
|
|
|
list_for_each_entry_rcu(delegation, &clp->cl_delegations, super_list) {
|
|
|
|
|
list_for_each_entry_rcu(delegation, &server->delegations, super_list) {
|
|
|
|
|
if (test_and_clear_bit(NFS_DELEGATION_REFERENCED, &delegation->flags))
|
|
|
|
|
continue;
|
|
|
|
|
nfs_mark_return_delegation(clp, delegation);
|
|
|
|
|
nfs_mark_return_delegation(delegation);
|
|
|
|
|
}
|
|
|
|
|
rcu_read_unlock();
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* nfs_expire_unreferenced_delegations - Eliminate unused delegations
|
|
|
|
|
* @clp: nfs_client to process
|
|
|
|
|
*
|
|
|
|
|
*/
|
|
|
|
|
void nfs_expire_unreferenced_delegations(struct nfs_client *clp)
|
|
|
|
|
{
|
|
|
|
|
nfs_client_mark_return_unreferenced_delegations(clp);
|
|
|
|
|
struct nfs_server *server;
|
|
|
|
|
|
|
|
|
|
rcu_read_lock();
|
|
|
|
|
list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link)
|
|
|
|
|
nfs_mark_return_unreferenced_delegations(server);
|
|
|
|
|
rcu_read_unlock();
|
|
|
|
|
|
|
|
|
|
nfs_delegation_run_state_manager(clp);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* Asynchronous delegation recall!
|
|
|
|
|
/**
|
|
|
|
|
* nfs_async_inode_return_delegation - asynchronously return a delegation
|
|
|
|
|
* @inode: inode to process
|
|
|
|
|
* @stateid: state ID information from CB_RECALL arguments
|
|
|
|
|
*
|
|
|
|
|
* Returns zero on success, or a negative errno value.
|
|
|
|
|
*/
|
|
|
|
|
int nfs_async_inode_return_delegation(struct inode *inode, const nfs4_stateid *stateid)
|
|
|
|
|
int nfs_async_inode_return_delegation(struct inode *inode,
|
|
|
|
|
const nfs4_stateid *stateid)
|
|
|
|
|
{
|
|
|
|
|
struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
|
|
|
|
|
struct nfs_delegation *delegation;
|
|
|
|
@ -475,22 +559,21 @@ int nfs_async_inode_return_delegation(struct inode *inode, const nfs4_stateid *s
|
|
|
|
|
rcu_read_unlock();
|
|
|
|
|
return -ENOENT;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
nfs_mark_return_delegation(clp, delegation);
|
|
|
|
|
nfs_mark_return_delegation(delegation);
|
|
|
|
|
rcu_read_unlock();
|
|
|
|
|
|
|
|
|
|
nfs_delegation_run_state_manager(clp);
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* Retrieve the inode associated with a delegation
|
|
|
|
|
*/
|
|
|
|
|
struct inode *nfs_delegation_find_inode(struct nfs_client *clp, const struct nfs_fh *fhandle)
|
|
|
|
|
static struct inode *
|
|
|
|
|
nfs_delegation_find_inode_server(struct nfs_server *server,
|
|
|
|
|
const struct nfs_fh *fhandle)
|
|
|
|
|
{
|
|
|
|
|
struct nfs_delegation *delegation;
|
|
|
|
|
struct inode *res = NULL;
|
|
|
|
|
rcu_read_lock();
|
|
|
|
|
list_for_each_entry_rcu(delegation, &clp->cl_delegations, super_list) {
|
|
|
|
|
|
|
|
|
|
list_for_each_entry_rcu(delegation, &server->delegations, super_list) {
|
|
|
|
|
spin_lock(&delegation->lock);
|
|
|
|
|
if (delegation->inode != NULL &&
|
|
|
|
|
nfs_compare_fh(fhandle, &NFS_I(delegation->inode)->fh) == 0) {
|
|
|
|
@ -500,47 +583,121 @@ struct inode *nfs_delegation_find_inode(struct nfs_client *clp, const struct nfs
|
|
|
|
|
if (res != NULL)
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
return res;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* nfs_delegation_find_inode - retrieve the inode associated with a delegation
|
|
|
|
|
* @clp: client state handle
|
|
|
|
|
* @fhandle: filehandle from a delegation recall
|
|
|
|
|
*
|
|
|
|
|
* Returns pointer to inode matching "fhandle," or NULL if a matching inode
|
|
|
|
|
* cannot be found.
|
|
|
|
|
*/
|
|
|
|
|
struct inode *nfs_delegation_find_inode(struct nfs_client *clp,
|
|
|
|
|
const struct nfs_fh *fhandle)
|
|
|
|
|
{
|
|
|
|
|
struct nfs_server *server;
|
|
|
|
|
struct inode *res = NULL;
|
|
|
|
|
|
|
|
|
|
rcu_read_lock();
|
|
|
|
|
list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) {
|
|
|
|
|
res = nfs_delegation_find_inode_server(server, fhandle);
|
|
|
|
|
if (res != NULL)
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
rcu_read_unlock();
|
|
|
|
|
return res;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* Mark all delegations as needing to be reclaimed
|
|
|
|
|
static void nfs_delegation_mark_reclaim_server(struct nfs_server *server)
|
|
|
|
|
{
|
|
|
|
|
struct nfs_delegation *delegation;
|
|
|
|
|
|
|
|
|
|
list_for_each_entry_rcu(delegation, &server->delegations, super_list)
|
|
|
|
|
set_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* nfs_delegation_mark_reclaim - mark all delegations as needing to be reclaimed
|
|
|
|
|
* @clp: nfs_client to process
|
|
|
|
|
*
|
|
|
|
|
*/
|
|
|
|
|
void nfs_delegation_mark_reclaim(struct nfs_client *clp)
|
|
|
|
|
{
|
|
|
|
|
struct nfs_delegation *delegation;
|
|
|
|
|
struct nfs_server *server;
|
|
|
|
|
|
|
|
|
|
rcu_read_lock();
|
|
|
|
|
list_for_each_entry_rcu(delegation, &clp->cl_delegations, super_list)
|
|
|
|
|
set_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags);
|
|
|
|
|
list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link)
|
|
|
|
|
nfs_delegation_mark_reclaim_server(server);
|
|
|
|
|
rcu_read_unlock();
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* Reap all unclaimed delegations after reboot recovery is done
|
|
|
|
|
/**
|
|
|
|
|
* nfs_delegation_reap_unclaimed - reap unclaimed delegations after reboot recovery is done
|
|
|
|
|
* @clp: nfs_client to process
|
|
|
|
|
*
|
|
|
|
|
*/
|
|
|
|
|
void nfs_delegation_reap_unclaimed(struct nfs_client *clp)
|
|
|
|
|
{
|
|
|
|
|
struct nfs_delegation *delegation;
|
|
|
|
|
struct nfs_server *server;
|
|
|
|
|
struct inode *inode;
|
|
|
|
|
|
|
|
|
|
restart:
|
|
|
|
|
rcu_read_lock();
|
|
|
|
|
list_for_each_entry_rcu(delegation, &clp->cl_delegations, super_list) {
|
|
|
|
|
if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) == 0)
|
|
|
|
|
continue;
|
|
|
|
|
inode = nfs_delegation_grab_inode(delegation);
|
|
|
|
|
if (inode == NULL)
|
|
|
|
|
continue;
|
|
|
|
|
delegation = nfs_detach_delegation(NFS_I(inode), clp);
|
|
|
|
|
rcu_read_unlock();
|
|
|
|
|
if (delegation != NULL)
|
|
|
|
|
nfs_free_delegation(delegation);
|
|
|
|
|
iput(inode);
|
|
|
|
|
goto restart;
|
|
|
|
|
list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) {
|
|
|
|
|
list_for_each_entry_rcu(delegation, &server->delegations,
|
|
|
|
|
super_list) {
|
|
|
|
|
if (test_bit(NFS_DELEGATION_NEED_RECLAIM,
|
|
|
|
|
&delegation->flags) == 0)
|
|
|
|
|
continue;
|
|
|
|
|
inode = nfs_delegation_grab_inode(delegation);
|
|
|
|
|
if (inode == NULL)
|
|
|
|
|
continue;
|
|
|
|
|
delegation = nfs_detach_delegation(NFS_I(inode),
|
|
|
|
|
server);
|
|
|
|
|
rcu_read_unlock();
|
|
|
|
|
|
|
|
|
|
if (delegation != NULL)
|
|
|
|
|
nfs_free_delegation(delegation);
|
|
|
|
|
iput(inode);
|
|
|
|
|
goto restart;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
rcu_read_unlock();
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* nfs_delegations_present - check for existence of delegations
|
|
|
|
|
* @clp: client state handle
|
|
|
|
|
*
|
|
|
|
|
* Returns one if there are any nfs_delegation structures attached
|
|
|
|
|
* to this nfs_client.
|
|
|
|
|
*/
|
|
|
|
|
int nfs_delegations_present(struct nfs_client *clp)
|
|
|
|
|
{
|
|
|
|
|
struct nfs_server *server;
|
|
|
|
|
int ret = 0;
|
|
|
|
|
|
|
|
|
|
rcu_read_lock();
|
|
|
|
|
list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link)
|
|
|
|
|
if (!list_empty(&server->delegations)) {
|
|
|
|
|
ret = 1;
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
rcu_read_unlock();
|
|
|
|
|
return ret;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* nfs4_copy_delegation_stateid - Copy inode's state ID information
|
|
|
|
|
* @dst: stateid data structure to fill in
|
|
|
|
|
* @inode: inode to check
|
|
|
|
|
*
|
|
|
|
|
* Returns one and fills in "dst->data" * if inode had a delegation,
|
|
|
|
|
* otherwise zero is returned.
|
|
|
|
|
*/
|
|
|
|
|
int nfs4_copy_delegation_stateid(nfs4_stateid *dst, struct inode *inode)
|
|
|
|
|
{
|
|
|
|
|
struct nfs_inode *nfsi = NFS_I(inode);
|
|
|
|
|