nfs41: v2 fix cb_recall bug
in NFSv4.1 the seqid part of a stateid in CB_RECALL must be 0 Signed-off-by: Alexandros Batsakis <batsakis@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
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@ -106,6 +106,8 @@ struct cb_sequenceres {
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extern unsigned nfs4_callback_sequence(struct cb_sequenceargs *args,
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struct cb_sequenceres *res);
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extern int nfs41_validate_delegation_stateid(struct nfs_delegation *delegation,
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const nfs4_stateid *stateid);
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#define RCA4_TYPE_MASK_RDATA_DLG 0
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#define RCA4_TYPE_MASK_WDATA_DLG 1
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@ -125,8 +127,9 @@ extern __be32 nfs4_callback_recall(struct cb_recallargs *args, void *dummy);
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#ifdef CONFIG_NFS_V4
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extern int nfs_callback_up(u32 minorversion, struct rpc_xprt *xprt);
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extern void nfs_callback_down(int minorversion);
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extern int nfs4_validate_delegation_stateid(struct nfs_delegation *delegation,
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const nfs4_stateid *stateid);
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#endif /* CONFIG_NFS_V4 */
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/*
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* nfs41: Callbacks are expected to not cause substantial latency,
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* so we limit their concurrency to 1 by setting up the maximum number
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@ -61,6 +61,16 @@ out:
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return res->status;
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}
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static int (*nfs_validate_delegation_stateid(struct nfs_client *clp))(struct nfs_delegation *, const nfs4_stateid *)
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{
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#if defined(CONFIG_NFS_V4_1)
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if (clp->cl_minorversion > 0)
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return nfs41_validate_delegation_stateid;
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#endif
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return nfs4_validate_delegation_stateid;
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}
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__be32 nfs4_callback_recall(struct cb_recallargs *args, void *dummy)
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{
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struct nfs_client *clp;
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@ -81,7 +91,8 @@ __be32 nfs4_callback_recall(struct cb_recallargs *args, void *dummy)
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inode = nfs_delegation_find_inode(clp, &args->fh);
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if (inode != NULL) {
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/* Set up a helper thread to actually return the delegation */
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switch(nfs_async_inode_return_delegation(inode, &args->stateid)) {
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switch (nfs_async_inode_return_delegation(inode, &args->stateid,
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nfs_validate_delegation_stateid(clp))) {
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case 0:
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res = 0;
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break;
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@ -102,8 +113,31 @@ out:
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return res;
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}
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int nfs4_validate_delegation_stateid(struct nfs_delegation *delegation, const nfs4_stateid *stateid)
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{
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if (delegation == NULL || memcmp(delegation->stateid.data, stateid->data,
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sizeof(delegation->stateid.data)) != 0)
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return 0;
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return 1;
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}
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#if defined(CONFIG_NFS_V4_1)
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int nfs41_validate_delegation_stateid(struct nfs_delegation *delegation, const nfs4_stateid *stateid)
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{
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if (delegation == NULL)
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return 0;
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/* seqid is 4-bytes long */
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if (((u32 *) &stateid->data)[0] != 0)
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return 0;
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if (memcmp(&delegation->stateid.data[4], &stateid->data[4],
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sizeof(stateid->data)-4))
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return 0;
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return 1;
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}
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/*
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* Validate the sequenceID sent by the server.
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* Return success if the sequenceID is one more than what we last saw on
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@ -255,5 +289,4 @@ out:
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dprintk("%s: exit with status = %d\n", __func__, ntohl(status));
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return status;
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}
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#endif /* CONFIG_NFS_V4_1 */
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@ -454,18 +454,21 @@ void nfs_expire_unreferenced_delegations(struct nfs_client *clp)
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/*
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* Asynchronous delegation recall!
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*/
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int nfs_async_inode_return_delegation(struct inode *inode, const nfs4_stateid *stateid)
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int nfs_async_inode_return_delegation(struct inode *inode, const nfs4_stateid *stateid,
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int (*validate_stateid)(struct nfs_delegation *delegation,
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const nfs4_stateid *stateid))
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{
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struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
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struct nfs_delegation *delegation;
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rcu_read_lock();
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delegation = rcu_dereference(NFS_I(inode)->delegation);
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if (delegation == NULL || memcmp(delegation->stateid.data, stateid->data,
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sizeof(delegation->stateid.data)) != 0) {
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if (!validate_stateid(delegation, stateid)) {
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rcu_read_unlock();
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return -ENOENT;
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}
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nfs_mark_return_delegation(clp, delegation);
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rcu_read_unlock();
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nfs_delegation_run_state_manager(clp);
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@ -34,7 +34,9 @@ enum {
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int nfs_inode_set_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, struct nfs_openres *res);
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int nfs_inode_return_delegation(struct inode *inode);
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int nfs_async_inode_return_delegation(struct inode *inode, const nfs4_stateid *stateid);
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int nfs_async_inode_return_delegation(struct inode *inode, const nfs4_stateid *stateid,
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int (*validate_stateid)(struct nfs_delegation *delegation,
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const nfs4_stateid *stateid));
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void nfs_inode_return_delegation_noreclaim(struct inode *inode);
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struct inode *nfs_delegation_find_inode(struct nfs_client *clp, const struct nfs_fh *fhandle);
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