Commit 4cfceaf0 authored by Linus Torvalds's avatar Linus Torvalds

Merge branch 'for-4.1' of git://linux-nfs.org/~bfields/linux

Pull nfsd bugfixes from Bruce Fields:
 "Mainly pnfs fixes (and for problems with generic callback code made
  more obvious by pnfs)"

* 'for-4.1' of git://linux-nfs.org/~bfields/linux:
  nfsd: skip CB_NULL probes for 4.1 or later
  nfsd: fix callback restarts
  nfsd: split transport vs operation errors for callbacks
  svcrpc: fix potential GSSX_ACCEPT_SEC_CONTEXT decoding failures
  nfsd: fix pNFS return on close semantics
  nfsd: fix the check for confirmed openowner in nfs4_preprocess_stateid_op
  nfsd/blocklayout: pretend we can send deviceid notifications
parents ef208162 4bd9e9b7
......@@ -181,6 +181,17 @@ nfsd4_block_proc_layoutcommit(struct inode *inode,
}
const struct nfsd4_layout_ops bl_layout_ops = {
/*
* Pretend that we send notification to the client. This is a blatant
* lie to force recent Linux clients to cache our device IDs.
* We rarely ever change the device ID, so the harm of leaking deviceids
* for a while isn't too bad. Unfortunately RFC5661 is a complete mess
* in this regard, but I filed errata 4119 for this a while ago, and
* hopefully the Linux client will eventually start caching deviceids
* without this again.
*/
.notify_types =
NOTIFY_DEVICEID4_DELETE | NOTIFY_DEVICEID4_CHANGE,
.proc_getdeviceinfo = nfsd4_block_proc_getdeviceinfo,
.encode_getdeviceinfo = nfsd4_block_encode_getdeviceinfo,
.proc_layoutget = nfsd4_block_proc_layoutget,
......
......@@ -224,7 +224,7 @@ static int nfs_cb_stat_to_errno(int status)
}
static int decode_cb_op_status(struct xdr_stream *xdr, enum nfs_opnum4 expected,
enum nfsstat4 *status)
int *status)
{
__be32 *p;
u32 op;
......@@ -235,7 +235,7 @@ static int decode_cb_op_status(struct xdr_stream *xdr, enum nfs_opnum4 expected,
op = be32_to_cpup(p++);
if (unlikely(op != expected))
goto out_unexpected;
*status = be32_to_cpup(p);
*status = nfs_cb_stat_to_errno(be32_to_cpup(p));
return 0;
out_overflow:
print_overflow_msg(__func__, xdr);
......@@ -446,22 +446,16 @@ static int decode_cb_sequence4resok(struct xdr_stream *xdr,
static int decode_cb_sequence4res(struct xdr_stream *xdr,
struct nfsd4_callback *cb)
{
enum nfsstat4 nfserr;
int status;
if (cb->cb_minorversion == 0)
return 0;
status = decode_cb_op_status(xdr, OP_CB_SEQUENCE, &nfserr);
if (unlikely(status))
goto out;
if (unlikely(nfserr != NFS4_OK))
goto out_default;
status = decode_cb_sequence4resok(xdr, cb);
out:
status = decode_cb_op_status(xdr, OP_CB_SEQUENCE, &cb->cb_status);
if (unlikely(status || cb->cb_status))
return status;
out_default:
return nfs_cb_stat_to_errno(nfserr);
return decode_cb_sequence4resok(xdr, cb);
}
/*
......@@ -524,26 +518,19 @@ static int nfs4_xdr_dec_cb_recall(struct rpc_rqst *rqstp,
struct nfsd4_callback *cb)
{
struct nfs4_cb_compound_hdr hdr;
enum nfsstat4 nfserr;
int status;
status = decode_cb_compound4res(xdr, &hdr);
if (unlikely(status))
goto out;
return status;
if (cb != NULL) {
status = decode_cb_sequence4res(xdr, cb);
if (unlikely(status))
goto out;
if (unlikely(status || cb->cb_status))
return status;
}
status = decode_cb_op_status(xdr, OP_CB_RECALL, &nfserr);
if (unlikely(status))
goto out;
if (unlikely(nfserr != NFS4_OK))
status = nfs_cb_stat_to_errno(nfserr);
out:
return status;
return decode_cb_op_status(xdr, OP_CB_RECALL, &cb->cb_status);
}
#ifdef CONFIG_NFSD_PNFS
......@@ -621,24 +608,18 @@ static int nfs4_xdr_dec_cb_layout(struct rpc_rqst *rqstp,
struct nfsd4_callback *cb)
{
struct nfs4_cb_compound_hdr hdr;
enum nfsstat4 nfserr;
int status;
status = decode_cb_compound4res(xdr, &hdr);
if (unlikely(status))
goto out;
return status;
if (cb) {
status = decode_cb_sequence4res(xdr, cb);
if (unlikely(status))
goto out;
}
status = decode_cb_op_status(xdr, OP_CB_LAYOUTRECALL, &nfserr);
if (unlikely(status))
goto out;
if (unlikely(nfserr != NFS4_OK))
status = nfs_cb_stat_to_errno(nfserr);
out:
if (unlikely(status || cb->cb_status))
return status;
}
return decode_cb_op_status(xdr, OP_CB_LAYOUTRECALL, &cb->cb_status);
}
#endif /* CONFIG_NFSD_PNFS */
......@@ -898,13 +879,6 @@ static void nfsd4_cb_prepare(struct rpc_task *task, void *calldata)
if (!nfsd41_cb_get_slot(clp, task))
return;
}
spin_lock(&clp->cl_lock);
if (list_empty(&cb->cb_per_client)) {
/* This is the first call, not a restart */
cb->cb_done = false;
list_add(&cb->cb_per_client, &clp->cl_callbacks);
}
spin_unlock(&clp->cl_lock);
rpc_call_start(task);
}
......@@ -918,6 +892,7 @@ static void nfsd4_cb_done(struct rpc_task *task, void *calldata)
if (clp->cl_minorversion) {
/* No need for lock, access serialized in nfsd4_cb_prepare */
if (!task->tk_status)
++clp->cl_cb_session->se_cb_seq_nr;
clear_bit(0, &clp->cl_cb_slot_busy);
rpc_wake_up_next(&clp->cl_cb_waitq);
......@@ -925,15 +900,25 @@ static void nfsd4_cb_done(struct rpc_task *task, void *calldata)
clp->cl_cb_session->se_cb_seq_nr);
}
if (clp->cl_cb_client != task->tk_client) {
/* We're shutting down or changing cl_cb_client; leave
* it to nfsd4_process_cb_update to restart the call if
* necessary. */
/*
* If the backchannel connection was shut down while this
* task was queued, we need to resubmit it after setting up
* a new backchannel connection.
*
* Note that if we lost our callback connection permanently
* the submission code will error out, so we don't need to
* handle that case here.
*/
if (task->tk_flags & RPC_TASK_KILLED) {
task->tk_status = 0;
cb->cb_need_restart = true;
return;
}
if (cb->cb_done)
return;
if (cb->cb_status) {
WARN_ON_ONCE(task->tk_status);
task->tk_status = cb->cb_status;
}
switch (cb->cb_ops->done(cb, task)) {
case 0:
......@@ -949,21 +934,17 @@ static void nfsd4_cb_done(struct rpc_task *task, void *calldata)
default:
BUG();
}
cb->cb_done = true;
}
static void nfsd4_cb_release(void *calldata)
{
struct nfsd4_callback *cb = calldata;
struct nfs4_client *clp = cb->cb_clp;
if (cb->cb_done) {
spin_lock(&clp->cl_lock);
list_del(&cb->cb_per_client);
spin_unlock(&clp->cl_lock);
if (cb->cb_need_restart)
nfsd4_run_cb(cb);
else
cb->cb_ops->release(cb);
}
}
static const struct rpc_call_ops nfsd4_cb_ops = {
......@@ -1058,9 +1039,6 @@ static void nfsd4_process_cb_update(struct nfsd4_callback *cb)
nfsd4_mark_cb_down(clp, err);
return;
}
/* Yay, the callback channel's back! Restart any callbacks: */
list_for_each_entry(cb, &clp->cl_callbacks, cb_per_client)
queue_work(callback_wq, &cb->cb_work);
}
static void
......@@ -1071,8 +1049,12 @@ nfsd4_run_cb_work(struct work_struct *work)
struct nfs4_client *clp = cb->cb_clp;
struct rpc_clnt *clnt;
if (cb->cb_need_restart) {
cb->cb_need_restart = false;
} else {
if (cb->cb_ops && cb->cb_ops->prepare)
cb->cb_ops->prepare(cb);
}
if (clp->cl_flags & NFSD4_CLIENT_CB_FLAG_MASK)
nfsd4_process_cb_update(cb);
......@@ -1084,6 +1066,15 @@ nfsd4_run_cb_work(struct work_struct *work)
cb->cb_ops->release(cb);
return;
}
/*
* Don't send probe messages for 4.1 or later.
*/
if (!cb->cb_ops && clp->cl_minorversion) {
clp->cl_cb_state = NFSD4_CB_UP;
return;
}
cb->cb_msg.rpc_cred = clp->cl_cb_cred;
rpc_call_async(clnt, &cb->cb_msg, RPC_TASK_SOFT | RPC_TASK_SOFTCONN,
cb->cb_ops ? &nfsd4_cb_ops : &nfsd4_cb_probe_ops, cb);
......@@ -1098,8 +1089,8 @@ void nfsd4_init_cb(struct nfsd4_callback *cb, struct nfs4_client *clp,
cb->cb_msg.rpc_resp = cb;
cb->cb_ops = ops;
INIT_WORK(&cb->cb_work, nfsd4_run_cb_work);
INIT_LIST_HEAD(&cb->cb_per_client);
cb->cb_done = true;
cb->cb_status = 0;
cb->cb_need_restart = false;
}
void nfsd4_run_cb(struct nfsd4_callback *cb)
......
This diff is collapsed.
......@@ -63,12 +63,12 @@ typedef struct {
struct nfsd4_callback {
struct nfs4_client *cb_clp;
struct list_head cb_per_client;
u32 cb_minorversion;
struct rpc_message cb_msg;
struct nfsd4_callback_ops *cb_ops;
struct work_struct cb_work;
bool cb_done;
int cb_status;
bool cb_need_restart;
};
struct nfsd4_callback_ops {
......@@ -126,6 +126,7 @@ struct nfs4_delegation {
struct list_head dl_perfile;
struct list_head dl_perclnt;
struct list_head dl_recall_lru; /* delegation recalled */
struct nfs4_clnt_odstate *dl_clnt_odstate;
u32 dl_type;
time_t dl_time;
/* For recall: */
......@@ -332,7 +333,6 @@ struct nfs4_client {
int cl_cb_state;
struct nfsd4_callback cl_cb_null;
struct nfsd4_session *cl_cb_session;
struct list_head cl_callbacks; /* list of in-progress callbacks */
/* for all client information that callback code might need: */
spinlock_t cl_lock;
......@@ -464,6 +464,17 @@ static inline struct nfs4_lockowner * lockowner(struct nfs4_stateowner *so)
return container_of(so, struct nfs4_lockowner, lo_owner);
}
/*
* Per-client state indicating no. of opens and outstanding delegations
* on a file from a particular client.'od' stands for 'open & delegation'
*/
struct nfs4_clnt_odstate {
struct nfs4_client *co_client;
struct nfs4_file *co_file;
struct list_head co_perfile;
atomic_t co_odcount;
};
/*
* nfs4_file: a file opened by some number of (open) nfs4_stateowners.
*
......@@ -485,6 +496,7 @@ struct nfs4_file {
struct list_head fi_delegations;
struct rcu_head fi_rcu;
};
struct list_head fi_clnt_odstate;
/* One each for O_RDONLY, O_WRONLY, O_RDWR: */
struct file * fi_fds[3];
/*
......@@ -526,6 +538,7 @@ struct nfs4_ol_stateid {
struct list_head st_perstateowner;
struct list_head st_locks;
struct nfs4_stateowner * st_stateowner;
struct nfs4_clnt_odstate * st_clnt_odstate;
unsigned char st_access_bmap;
unsigned char st_deny_bmap;
struct nfs4_ol_stateid * st_openstp;
......
......@@ -247,6 +247,7 @@ struct nfsd4_open {
struct nfs4_openowner *op_openowner; /* used during processing */
struct nfs4_file *op_file; /* used during processing */
struct nfs4_ol_stateid *op_stp; /* used during processing */
struct nfs4_clnt_odstate *op_odstate; /* used during processing */
struct nfs4_acl *op_acl;
struct xdr_netobj op_label;
};
......
......@@ -793,20 +793,26 @@ int gssx_dec_accept_sec_context(struct rpc_rqst *rqstp,
{
u32 value_follows;
int err;
struct page *scratch;
scratch = alloc_page(GFP_KERNEL);
if (!scratch)
return -ENOMEM;
xdr_set_scratch_buffer(xdr, page_address(scratch), PAGE_SIZE);
/* res->status */
err = gssx_dec_status(xdr, &res->status);
if (err)
return err;
goto out_free;
/* res->context_handle */
err = gssx_dec_bool(xdr, &value_follows);
if (err)
return err;
goto out_free;
if (value_follows) {
err = gssx_dec_ctx(xdr, res->context_handle);
if (err)
return err;
goto out_free;
} else {
res->context_handle = NULL;
}
......@@ -814,11 +820,11 @@ int gssx_dec_accept_sec_context(struct rpc_rqst *rqstp,
/* res->output_token */
err = gssx_dec_bool(xdr, &value_follows);
if (err)
return err;
goto out_free;
if (value_follows) {
err = gssx_dec_buffer(xdr, res->output_token);
if (err)
return err;
goto out_free;
} else {
res->output_token = NULL;
}
......@@ -826,14 +832,17 @@ int gssx_dec_accept_sec_context(struct rpc_rqst *rqstp,
/* res->delegated_cred_handle */
err = gssx_dec_bool(xdr, &value_follows);
if (err)
return err;
goto out_free;
if (value_follows) {
/* we do not support upcall servers sending this data. */
return -EINVAL;
err = -EINVAL;
goto out_free;
}
/* res->options */
err = gssx_dec_option_array(xdr, &res->options);
out_free:
__free_page(scratch);
return err;
}
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