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Merge tag 'nfsd-4.15' of git://linux-nfs.org/~bfields/linux

Browse Source 
Pull nfsd updates from Bruce Fields:
 "Lots of good bugfixes, including:

   -  fix a number of races in the NFSv4+ state code

   -  fix some shutdown crashes in multiple-network-namespace cases

   -  relax our 4.1 session limits; if you've an artificially low limit
      to the number of 4.1 clients that can mount simultaneously, try
      upgrading"

* tag 'nfsd-4.15' of git://linux-nfs.org/~bfields/linux: (22 commits)
  SUNRPC: Improve ordering of transport processing
  nfsd: deal with revoked delegations appropriately
  svcrdma: Enqueue after setting XPT_CLOSE in completion handlers
  nfsd: use nfs->ns.inum as net ID
  rpc: remove some BUG()s
  svcrdma: Preserve CB send buffer across retransmits
  nfds: avoid gettimeofday for nfssvc_boot time
  fs, nfsd: convert nfs4_file.fi_ref from atomic_t to refcount_t
  fs, nfsd: convert nfs4_cntl_odstate.co_odcount from atomic_t to refcount_t
  fs, nfsd: convert nfs4_stid.sc_count from atomic_t to refcount_t
  lockd: double unregister of inetaddr notifiers
  nfsd4: catch some false session retries
  nfsd4: fix cached replies to solo SEQUENCE compounds
  sunrcp: make function _svc_create_xprt static
  SUNRPC: Fix tracepoint storage issues with svc_recv and svc_rqst_status
  nfsd: use ARRAY_SIZE
  nfsd: give out fewer session slots as limit approaches
  nfsd: increase DRC cache limit
  nfsd: remove unnecessary nofilehandle checks
  nfs_common: convert int to bool
  ...
This commit is contained in:
Linus Torvalds
2017-11-18 11:22:04 -08:00
parent 07c455ee22 22700f3c6d
commit 4dd3c2e5a4
18 changed files with 225 additions and 173 deletions
Download Patch File Download Diff File Expand all files Collapse all files

14
net/sunrpc/auth_gss/svcauth_gss.c
View File

@@ -855,11 +855,13 @@ unwrap_integ_data(struct svc_rqst *rqstp, struct xdr_buf *buf, u32 seq, struct g
return stat;
if (integ_len > buf->len)
return stat;
if (xdr_buf_subsegment(buf, &integ_buf, 0, integ_len))
BUG();
if (xdr_buf_subsegment(buf, &integ_buf, 0, integ_len)) {
WARN_ON_ONCE(1);
return stat;
}
/* copy out mic... */
if (read_u32_from_xdr_buf(buf, integ_len, &mic.len))
BUG();
return stat;
if (mic.len > RPC_MAX_AUTH_SIZE)
return stat;
mic.data = kmalloc(mic.len, GFP_KERNEL);
@@ -1611,8 +1613,10 @@ svcauth_gss_wrap_resp_integ(struct svc_rqst *rqstp)
BUG_ON(integ_len % 4);
*p++ = htonl(integ_len);
*p++ = htonl(gc->gc_seq);
if (xdr_buf_subsegment(resbuf, &integ_buf, integ_offset, integ_len))
BUG();
if (xdr_buf_subsegment(resbuf, &integ_buf, integ_offset, integ_len)) {
WARN_ON_ONCE(1);
goto out_err;
}
if (resbuf->tail[0].iov_base == NULL) {
if (resbuf->head[0].iov_len + RPC_MAX_AUTH_SIZE > PAGE_SIZE)
goto out_err;

106
net/sunrpc/svc_xprt.c
View File

@@ -250,9 +250,9 @@ void svc_add_new_perm_xprt(struct svc_serv *serv, struct svc_xprt *new)
svc_xprt_received(new);
}
int _svc_create_xprt(struct svc_serv *serv, const char *xprt_name,
struct net *net, const int family,
const unsigned short port, int flags)
static int _svc_create_xprt(struct svc_serv *serv, const char *xprt_name,
struct net *net, const int family,
const unsigned short port, int flags)
{
struct svc_xprt_class *xcl;
@@ -380,7 +380,6 @@ void svc_xprt_do_enqueue(struct svc_xprt *xprt)
struct svc_pool *pool;
struct svc_rqst *rqstp = NULL;
int cpu;
bool queued = false;
if (!svc_xprt_has_something_to_do(xprt))
goto out;
@@ -401,58 +400,25 @@ void svc_xprt_do_enqueue(struct svc_xprt *xprt)
atomic_long_inc(&pool->sp_stats.packets);
redo_search:
dprintk("svc: transport %p put into queue\n", xprt);
spin_lock_bh(&pool->sp_lock);
list_add_tail(&xprt->xpt_ready, &pool->sp_sockets);
pool->sp_stats.sockets_queued++;
spin_unlock_bh(&pool->sp_lock);
/* find a thread for this xprt */
rcu_read_lock();
list_for_each_entry_rcu(rqstp, &pool->sp_all_threads, rq_all) {
/* Do a lockless check first */
if (test_bit(RQ_BUSY, &rqstp->rq_flags))
if (test_and_set_bit(RQ_BUSY, &rqstp->rq_flags))
continue;
/*
* Once the xprt has been queued, it can only be dequeued by
* the task that intends to service it. All we can do at that
* point is to try to wake this thread back up so that it can
* do so.
*/
if (!queued) {
spin_lock_bh(&rqstp->rq_lock);
if (test_and_set_bit(RQ_BUSY, &rqstp->rq_flags)) {
/* already busy, move on... */
spin_unlock_bh(&rqstp->rq_lock);
continue;
}
/* this one will do */
rqstp->rq_xprt = xprt;
svc_xprt_get(xprt);
spin_unlock_bh(&rqstp->rq_lock);
}
rcu_read_unlock();
atomic_long_inc(&pool->sp_stats.threads_woken);
wake_up_process(rqstp->rq_task);
put_cpu();
goto out;
}
rcu_read_unlock();
/*
* We didn't find an idle thread to use, so we need to queue the xprt.
* Do so and then search again. If we find one, we can't hook this one
* up to it directly but we can wake the thread up in the hopes that it
* will pick it up once it searches for a xprt to service.
*/
if (!queued) {
queued = true;
dprintk("svc: transport %p put into queue\n", xprt);
spin_lock_bh(&pool->sp_lock);
list_add_tail(&xprt->xpt_ready, &pool->sp_sockets);
pool->sp_stats.sockets_queued++;
spin_unlock_bh(&pool->sp_lock);
goto redo_search;
goto out_unlock;
}
set_bit(SP_CONGESTED, &pool->sp_flags);
rqstp = NULL;
out_unlock:
rcu_read_unlock();
put_cpu();
out:
trace_svc_xprt_do_enqueue(xprt, rqstp);
@@ -721,38 +687,25 @@ rqst_should_sleep(struct svc_rqst *rqstp)
static struct svc_xprt *svc_get_next_xprt(struct svc_rqst *rqstp, long timeout)
{
struct svc_xprt *xprt;
struct svc_pool *pool = rqstp->rq_pool;
long time_left = 0;
/* rq_xprt should be clear on entry */
WARN_ON_ONCE(rqstp->rq_xprt);
/* Normally we will wait up to 5 seconds for any required
* cache information to be provided.
*/
rqstp->rq_chandle.thread_wait = 5*HZ;
xprt = svc_xprt_dequeue(pool);
if (xprt) {
rqstp->rq_xprt = xprt;
/* As there is a shortage of threads and this request
* had to be queued, don't allow the thread to wait so
* long for cache updates.
*/
rqstp->rq_chandle.thread_wait = 1*HZ;
clear_bit(SP_TASK_PENDING, &pool->sp_flags);
return xprt;
}
rqstp->rq_xprt = svc_xprt_dequeue(pool);
if (rqstp->rq_xprt)
goto out_found;
/*
* We have to be able to interrupt this wait
* to bring down the daemons ...
*/
set_current_state(TASK_INTERRUPTIBLE);
smp_mb__before_atomic();
clear_bit(SP_CONGESTED, &pool->sp_flags);
clear_bit(RQ_BUSY, &rqstp->rq_flags);
smp_mb();
smp_mb__after_atomic();
if (likely(rqst_should_sleep(rqstp)))
time_left = schedule_timeout(timeout);
@@ -761,13 +714,11 @@ static struct svc_xprt *svc_get_next_xprt(struct svc_rqst *rqstp, long timeout)
try_to_freeze();
spin_lock_bh(&rqstp->rq_lock);
set_bit(RQ_BUSY, &rqstp->rq_flags);
spin_unlock_bh(&rqstp->rq_lock);
xprt = rqstp->rq_xprt;
if (xprt != NULL)
return xprt;
smp_mb__after_atomic();
rqstp->rq_xprt = svc_xprt_dequeue(pool);
if (rqstp->rq_xprt)
goto out_found;
if (!time_left)
atomic_long_inc(&pool->sp_stats.threads_timedout);
@@ -775,6 +726,15 @@ static struct svc_xprt *svc_get_next_xprt(struct svc_rqst *rqstp, long timeout)
if (signalled() || kthread_should_stop())
return ERR_PTR(-EINTR);
return ERR_PTR(-EAGAIN);
out_found:
/* Normally we will wait up to 5 seconds for any required
* cache information to be provided.
*/
if (!test_bit(SP_CONGESTED, &pool->sp_flags))
rqstp->rq_chandle.thread_wait = 5*HZ;
else
rqstp->rq_chandle.thread_wait = 1*HZ;
return rqstp->rq_xprt;
}
static void svc_add_new_temp_xprt(struct svc_serv *serv, struct svc_xprt *newxpt)

6
net/sunrpc/xprtrdma/svc_rdma_backchannel.c
View File

@@ -133,6 +133,10 @@ static int svc_rdma_bc_sendto(struct svcxprt_rdma *rdma,
if (ret)
goto out_err;
/* Bump page refcnt so Send completion doesn't release
* the rq_buffer before all retransmits are complete.
*/
get_page(virt_to_page(rqst->rq_buffer));
ret = svc_rdma_post_send_wr(rdma, ctxt, 1, 0);
if (ret)
goto out_unmap;
@@ -165,7 +169,6 @@ xprt_rdma_bc_allocate(struct rpc_task *task)
return -EINVAL;
}
/* svc_rdma_sendto releases this page */
page = alloc_page(RPCRDMA_DEF_GFP);
if (!page)
return -ENOMEM;
@@ -184,6 +187,7 @@ xprt_rdma_bc_free(struct rpc_task *task)
{
struct rpc_rqst *rqst = task->tk_rqstp;
put_page(virt_to_page(rqst->rq_buffer));
kfree(rqst->rq_rbuffer);
}

11
net/sunrpc/xprtrdma/svc_rdma_transport.c
View File

@@ -290,6 +290,7 @@ static void qp_event_handler(struct ib_event *event, void *context)
ib_event_msg(event->event), event->event,
event->element.qp);
set_bit(XPT_CLOSE, &xprt->xpt_flags);
svc_xprt_enqueue(xprt);
break;
}
}
@@ -322,8 +323,7 @@ static void svc_rdma_wc_receive(struct ib_cq *cq, struct ib_wc *wc)
set_bit(XPT_DATA, &xprt->sc_xprt.xpt_flags);
if (test_bit(RDMAXPRT_CONN_PENDING, &xprt->sc_flags))
goto out;
svc_xprt_enqueue(&xprt->sc_xprt);
goto out;
goto out_enqueue;
flushed:
if (wc->status != IB_WC_WR_FLUSH_ERR)
@@ -333,6 +333,8 @@ flushed:
set_bit(XPT_CLOSE, &xprt->sc_xprt.xpt_flags);
svc_rdma_put_context(ctxt, 1);
out_enqueue:
svc_xprt_enqueue(&xprt->sc_xprt);
out:
svc_xprt_put(&xprt->sc_xprt);
}
@@ -358,6 +360,7 @@ void svc_rdma_wc_send(struct ib_cq *cq, struct ib_wc *wc)
if (unlikely(wc->status != IB_WC_SUCCESS)) {
set_bit(XPT_CLOSE, &xprt->sc_xprt.xpt_flags);
svc_xprt_enqueue(&xprt->sc_xprt);
if (wc->status != IB_WC_WR_FLUSH_ERR)
pr_err("svcrdma: Send: %s (%u/0x%x)\n",
ib_wc_status_msg(wc->status),
@@ -569,8 +572,10 @@ static int rdma_listen_handler(struct rdma_cm_id *cma_id,
case RDMA_CM_EVENT_DEVICE_REMOVAL:
dprintk("svcrdma: Device removal xprt=%p, cm_id=%p\n",
xprt, cma_id);
if (xprt)
if (xprt) {
set_bit(XPT_CLOSE, &xprt->sc_xprt.xpt_flags);
svc_xprt_enqueue(&xprt->sc_xprt);
}
break;
default: