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-rw-r--r--net/9p/client.c70
-rw-r--r--net/9p/trans_fd.c40
-rw-r--r--net/9p/trans_rdma.c133
-rw-r--r--net/sunrpc/auth_gss/gss_mech_switch.c5
-rw-r--r--net/sunrpc/auth_gss/svcauth_gss.c10
-rw-r--r--net/sunrpc/cache.c83
-rw-r--r--net/sunrpc/clnt.c16
-rw-r--r--net/sunrpc/rpc_pipe.c25
-rw-r--r--net/sunrpc/svcauth_unix.c6
-rw-r--r--net/sunrpc/svcsock.c9
-rw-r--r--net/sunrpc/xprtsock.c1
11 files changed, 259 insertions, 139 deletions
diff --git a/net/9p/client.c b/net/9p/client.c
index 01f1779eba80..8b93cae2d11d 100644
--- a/net/9p/client.c
+++ b/net/9p/client.c
@@ -204,6 +204,17 @@ free_and_return:
return ret;
}
+struct p9_fcall *p9_fcall_alloc(int alloc_msize)
+{
+ struct p9_fcall *fc;
+ fc = kmalloc(sizeof(struct p9_fcall) + alloc_msize, GFP_NOFS);
+ if (!fc)
+ return NULL;
+ fc->capacity = alloc_msize;
+ fc->sdata = (char *) fc + sizeof(struct p9_fcall);
+ return fc;
+}
+
/**
* p9_tag_alloc - lookup/allocate a request by tag
* @c: client session to lookup tag within
@@ -256,39 +267,36 @@ p9_tag_alloc(struct p9_client *c, u16 tag, unsigned int max_size)
col = tag % P9_ROW_MAXTAG;
req = &c->reqs[row][col];
- if (!req->tc) {
+ if (!req->wq) {
req->wq = kmalloc(sizeof(wait_queue_head_t), GFP_NOFS);
- if (!req->wq) {
- pr_err("Couldn't grow tag array\n");
- return ERR_PTR(-ENOMEM);
- }
+ if (!req->wq)
+ goto grow_failed;
init_waitqueue_head(req->wq);
- req->tc = kmalloc(sizeof(struct p9_fcall) + alloc_msize,
- GFP_NOFS);
- req->rc = kmalloc(sizeof(struct p9_fcall) + alloc_msize,
- GFP_NOFS);
- if ((!req->tc) || (!req->rc)) {
- pr_err("Couldn't grow tag array\n");
- kfree(req->tc);
- kfree(req->rc);
- kfree(req->wq);
- req->tc = req->rc = NULL;
- req->wq = NULL;
- return ERR_PTR(-ENOMEM);
- }
- req->tc->capacity = alloc_msize;
- req->rc->capacity = alloc_msize;
- req->tc->sdata = (char *) req->tc + sizeof(struct p9_fcall);
- req->rc->sdata = (char *) req->rc + sizeof(struct p9_fcall);
}
+ if (!req->tc)
+ req->tc = p9_fcall_alloc(alloc_msize);
+ if (!req->rc)
+ req->rc = p9_fcall_alloc(alloc_msize);
+ if (!req->tc || !req->rc)
+ goto grow_failed;
+
p9pdu_reset(req->tc);
p9pdu_reset(req->rc);
req->tc->tag = tag-1;
req->status = REQ_STATUS_ALLOC;
- return &c->reqs[row][col];
+ return req;
+
+grow_failed:
+ pr_err("Couldn't grow tag array\n");
+ kfree(req->tc);
+ kfree(req->rc);
+ kfree(req->wq);
+ req->tc = req->rc = NULL;
+ req->wq = NULL;
+ return ERR_PTR(-ENOMEM);
}
/**
@@ -648,12 +656,20 @@ static int p9_client_flush(struct p9_client *c, struct p9_req_t *oldreq)
return PTR_ERR(req);
- /* if we haven't received a response for oldreq,
- remove it from the list. */
+ /*
+ * if we haven't received a response for oldreq,
+ * remove it from the list, and notify the transport
+ * layer that the reply will never arrive.
+ */
spin_lock(&c->lock);
- if (oldreq->status == REQ_STATUS_FLSH)
+ if (oldreq->status == REQ_STATUS_FLSH) {
list_del(&oldreq->req_list);
- spin_unlock(&c->lock);
+ spin_unlock(&c->lock);
+ if (c->trans_mod->cancelled)
+ c->trans_mod->cancelled(c, req);
+ } else {
+ spin_unlock(&c->lock);
+ }
p9_free_req(c, req);
return 0;
diff --git a/net/9p/trans_fd.c b/net/9p/trans_fd.c
index 02efb25c2957..3ffda1b3799b 100644
--- a/net/9p/trans_fd.c
+++ b/net/9p/trans_fd.c
@@ -63,6 +63,7 @@ struct p9_fd_opts {
int rfd;
int wfd;
u16 port;
+ int privport;
};
/**
@@ -87,12 +88,15 @@ struct p9_trans_fd {
enum {
/* Options that take integer arguments */
Opt_port, Opt_rfdno, Opt_wfdno, Opt_err,
+ /* Options that take no arguments */
+ Opt_privport,
};
static const match_table_t tokens = {
{Opt_port, "port=%u"},
{Opt_rfdno, "rfdno=%u"},
{Opt_wfdno, "wfdno=%u"},
+ {Opt_privport, "privport"},
{Opt_err, NULL},
};
@@ -161,6 +165,9 @@ static DEFINE_SPINLOCK(p9_poll_lock);
static LIST_HEAD(p9_poll_pending_list);
static DECLARE_WORK(p9_poll_work, p9_poll_workfn);
+static unsigned int p9_ipport_resv_min = P9_DEF_MIN_RESVPORT;
+static unsigned int p9_ipport_resv_max = P9_DEF_MAX_RESVPORT;
+
static void p9_mux_poll_stop(struct p9_conn *m)
{
unsigned long flags;
@@ -741,7 +748,7 @@ static int parse_opts(char *params, struct p9_fd_opts *opts)
if (!*p)
continue;
token = match_token(p, tokens, args);
- if (token != Opt_err) {
+ if ((token != Opt_err) && (token != Opt_privport)) {
r = match_int(&args[0], &option);
if (r < 0) {
p9_debug(P9_DEBUG_ERROR,
@@ -759,6 +766,9 @@ static int parse_opts(char *params, struct p9_fd_opts *opts)
case Opt_wfdno:
opts->wfd = option;
break;
+ case Opt_privport:
+ opts->privport = 1;
+ break;
default:
continue;
}
@@ -898,6 +908,24 @@ static inline int valid_ipaddr4(const char *buf)
return 0;
}
+static int p9_bind_privport(struct socket *sock)
+{
+ struct sockaddr_in cl;
+ int port, err = -EINVAL;
+
+ memset(&cl, 0, sizeof(cl));
+ cl.sin_family = AF_INET;
+ cl.sin_addr.s_addr = INADDR_ANY;
+ for (port = p9_ipport_resv_max; port >= p9_ipport_resv_min; port--) {
+ cl.sin_port = htons((ushort)port);
+ err = kernel_bind(sock, (struct sockaddr *)&cl, sizeof(cl));
+ if (err != -EADDRINUSE)
+ break;
+ }
+ return err;
+}
+
+
static int
p9_fd_create_tcp(struct p9_client *client, const char *addr, char *args)
{
@@ -926,6 +954,16 @@ p9_fd_create_tcp(struct p9_client *client, const char *addr, char *args)
return err;
}
+ if (opts.privport) {
+ err = p9_bind_privport(csocket);
+ if (err < 0) {
+ pr_err("%s (%d): problem binding to privport\n",
+ __func__, task_pid_nr(current));
+ sock_release(csocket);
+ return err;
+ }
+ }
+
err = csocket->ops->connect(csocket,
(struct sockaddr *)&sin_server,
sizeof(struct sockaddr_in), 0);
diff --git a/net/9p/trans_rdma.c b/net/9p/trans_rdma.c
index 2c69ddd691a1..928f2bb9bf8d 100644
--- a/net/9p/trans_rdma.c
+++ b/net/9p/trans_rdma.c
@@ -57,9 +57,7 @@
#define P9_RDMA_IRD 0
#define P9_RDMA_ORD 0
#define P9_RDMA_TIMEOUT 30000 /* 30 seconds */
-#define P9_RDMA_MAXSIZE (4*4096) /* Min SGE is 4, so we can
- * safely advertise a maxsize
- * of 64k */
+#define P9_RDMA_MAXSIZE (1024*1024) /* 1MB */
/**
* struct p9_trans_rdma - RDMA transport instance
@@ -75,7 +73,9 @@
* @sq_depth: The depth of the Send Queue
* @sq_sem: Semaphore for the SQ
* @rq_depth: The depth of the Receive Queue.
- * @rq_count: Count of requests in the Receive Queue.
+ * @rq_sem: Semaphore for the RQ
+ * @excess_rc : Amount of posted Receive Contexts without a pending request.
+ * See rdma_request()
* @addr: The remote peer's address
* @req_lock: Protects the active request list
* @cm_done: Completion event for connection management tracking
@@ -100,7 +100,8 @@ struct p9_trans_rdma {
int sq_depth;
struct semaphore sq_sem;
int rq_depth;
- atomic_t rq_count;
+ struct semaphore rq_sem;
+ atomic_t excess_rc;
struct sockaddr_in addr;
spinlock_t req_lock;
@@ -296,6 +297,13 @@ handle_recv(struct p9_client *client, struct p9_trans_rdma *rdma,
if (!req)
goto err_out;
+ /* Check that we have not yet received a reply for this request.
+ */
+ if (unlikely(req->rc)) {
+ pr_err("Duplicate reply for request %d", tag);
+ goto err_out;
+ }
+
req->rc = c->rc;
req->status = REQ_STATUS_RCVD;
p9_client_cb(client, req);
@@ -336,8 +344,8 @@ static void cq_comp_handler(struct ib_cq *cq, void *cq_context)
switch (c->wc_op) {
case IB_WC_RECV:
- atomic_dec(&rdma->rq_count);
handle_recv(client, rdma, c, wc.status, wc.byte_len);
+ up(&rdma->rq_sem);
break;
case IB_WC_SEND:
@@ -421,32 +429,33 @@ static int rdma_request(struct p9_client *client, struct p9_req_t *req)
struct p9_rdma_context *c = NULL;
struct p9_rdma_context *rpl_context = NULL;
+ /* When an error occurs between posting the recv and the send,
+ * there will be a receive context posted without a pending request.
+ * Since there is no way to "un-post" it, we remember it and skip
+ * post_recv() for the next request.
+ * So here,
+ * see if we are this `next request' and need to absorb an excess rc.
+ * If yes, then drop and free our own, and do not recv_post().
+ **/
+ if (unlikely(atomic_read(&rdma->excess_rc) > 0)) {
+ if ((atomic_sub_return(1, &rdma->excess_rc) >= 0)) {
+ /* Got one ! */
+ kfree(req->rc);
+ req->rc = NULL;
+ goto dont_need_post_recv;
+ } else {
+ /* We raced and lost. */
+ atomic_inc(&rdma->excess_rc);
+ }
+ }
+
/* Allocate an fcall for the reply */
rpl_context = kmalloc(sizeof *rpl_context, GFP_NOFS);
if (!rpl_context) {
err = -ENOMEM;
- goto err_close;
- }
-
- /*
- * If the request has a buffer, steal it, otherwise
- * allocate a new one. Typically, requests should already
- * have receive buffers allocated and just swap them around
- */
- if (!req->rc) {
- req->rc = kmalloc(sizeof(struct p9_fcall)+client->msize,
- GFP_NOFS);
- if (req->rc) {
- req->rc->sdata = (char *) req->rc +
- sizeof(struct p9_fcall);
- req->rc->capacity = client->msize;
- }
+ goto recv_error;
}
rpl_context->rc = req->rc;
- if (!rpl_context->rc) {
- err = -ENOMEM;
- goto err_free2;
- }
/*
* Post a receive buffer for this request. We need to ensure
@@ -455,29 +464,35 @@ static int rdma_request(struct p9_client *client, struct p9_req_t *req)
* outstanding request, so we must keep a count to avoid
* overflowing the RQ.
*/
- if (atomic_inc_return(&rdma->rq_count) <= rdma->rq_depth) {
- err = post_recv(client, rpl_context);
- if (err)
- goto err_free1;
- } else
- atomic_dec(&rdma->rq_count);
+ if (down_interruptible(&rdma->rq_sem)) {
+ err = -EINTR;
+ goto recv_error;
+ }
+ err = post_recv(client, rpl_context);
+ if (err) {
+ p9_debug(P9_DEBUG_FCALL, "POST RECV failed\n");
+ goto recv_error;
+ }
/* remove posted receive buffer from request structure */
req->rc = NULL;
+dont_need_post_recv:
/* Post the request */
c = kmalloc(sizeof *c, GFP_NOFS);
if (!c) {
err = -ENOMEM;
- goto err_free1;
+ goto send_error;
}
c->req = req;
c->busa = ib_dma_map_single(rdma->cm_id->device,
c->req->tc->sdata, c->req->tc->size,
DMA_TO_DEVICE);
- if (ib_dma_mapping_error(rdma->cm_id->device, c->busa))
- goto error;
+ if (ib_dma_mapping_error(rdma->cm_id->device, c->busa)) {
+ err = -EIO;
+ goto send_error;
+ }
sge.addr = c->busa;
sge.length = c->req->tc->size;
@@ -491,22 +506,32 @@ static int rdma_request(struct p9_client *client, struct p9_req_t *req)
wr.sg_list = &sge;
wr.num_sge = 1;
- if (down_interruptible(&rdma->sq_sem))
- goto error;
+ if (down_interruptible(&rdma->sq_sem)) {
+ err = -EINTR;
+ goto send_error;
+ }
- return ib_post_send(rdma->qp, &wr, &bad_wr);
+ err = ib_post_send(rdma->qp, &wr, &bad_wr);
+ if (err)
+ goto send_error;
- error:
+ /* Success */
+ return 0;
+
+ /* Handle errors that happened during or while preparing the send: */
+ send_error:
kfree(c);
- kfree(rpl_context->rc);
- kfree(rpl_context);
- p9_debug(P9_DEBUG_ERROR, "EIO\n");
- return -EIO;
- err_free1:
- kfree(rpl_context->rc);
- err_free2:
+ p9_debug(P9_DEBUG_ERROR, "Error %d in rdma_request()\n", err);
+
+ /* Ach.
+ * We did recv_post(), but not send. We have one recv_post in excess.
+ */
+ atomic_inc(&rdma->excess_rc);
+ return err;
+
+ /* Handle errors that happened during or while preparing post_recv(): */
+ recv_error:
kfree(rpl_context);
- err_close:
spin_lock_irqsave(&rdma->req_lock, flags);
if (rdma->state < P9_RDMA_CLOSING) {
rdma->state = P9_RDMA_CLOSING;
@@ -551,7 +576,8 @@ static struct p9_trans_rdma *alloc_rdma(struct p9_rdma_opts *opts)
spin_lock_init(&rdma->req_lock);
init_completion(&rdma->cm_done);
sema_init(&rdma->sq_sem, rdma->sq_depth);
- atomic_set(&rdma->rq_count, 0);
+ sema_init(&rdma->rq_sem, rdma->rq_depth);
+ atomic_set(&rdma->excess_rc, 0);
return rdma;
}
@@ -562,6 +588,17 @@ static int rdma_cancel(struct p9_client *client, struct p9_req_t *req)
return 1;
}
+/* A request has been fully flushed without a reply.
+ * That means we have posted one buffer in excess.
+ */
+static int rdma_cancelled(struct p9_client *client, struct p9_req_t *req)
+{
+ struct p9_trans_rdma *rdma = client->trans;
+
+ atomic_inc(&rdma->excess_rc);
+ return 0;
+}
+
/**
* trans_create_rdma - Transport method for creating atransport instance
* @client: client instance
diff --git a/net/sunrpc/auth_gss/gss_mech_switch.c b/net/sunrpc/auth_gss/gss_mech_switch.c
index defa9d33925c..27ce26240932 100644
--- a/net/sunrpc/auth_gss/gss_mech_switch.c
+++ b/net/sunrpc/auth_gss/gss_mech_switch.c
@@ -139,11 +139,12 @@ void gss_mech_unregister(struct gss_api_mech *gm)
}
EXPORT_SYMBOL_GPL(gss_mech_unregister);
-static struct gss_api_mech *gss_mech_get(struct gss_api_mech *gm)
+struct gss_api_mech *gss_mech_get(struct gss_api_mech *gm)
{
__module_get(gm->gm_owner);
return gm;
}
+EXPORT_SYMBOL(gss_mech_get);
static struct gss_api_mech *
_gss_mech_get_by_name(const char *name)
@@ -360,6 +361,7 @@ gss_pseudoflavor_to_service(struct gss_api_mech *gm, u32 pseudoflavor)
}
return 0;
}
+EXPORT_SYMBOL(gss_pseudoflavor_to_service);
char *
gss_service_to_auth_domain_name(struct gss_api_mech *gm, u32 service)
@@ -379,6 +381,7 @@ gss_mech_put(struct gss_api_mech * gm)
if (gm)
module_put(gm->gm_owner);
}
+EXPORT_SYMBOL(gss_mech_put);
/* The mech could probably be determined from the token instead, but it's just
* as easy for now to pass it in. */
diff --git a/net/sunrpc/auth_gss/svcauth_gss.c b/net/sunrpc/auth_gss/svcauth_gss.c
index b05ace4c5f12..d0347d148b34 100644
--- a/net/sunrpc/auth_gss/svcauth_gss.c
+++ b/net/sunrpc/auth_gss/svcauth_gss.c
@@ -377,8 +377,7 @@ rsc_init(struct cache_head *cnew, struct cache_head *ctmp)
new->handle.data = tmp->handle.data;
tmp->handle.data = NULL;
new->mechctx = NULL;
- new->cred.cr_group_info = NULL;
- new->cred.cr_principal = NULL;
+ init_svc_cred(&new->cred);
}
static void
@@ -392,9 +391,7 @@ update_rsc(struct cache_head *cnew, struct cache_head *ctmp)
memset(&new->seqdata, 0, sizeof(new->seqdata));
spin_lock_init(&new->seqdata.sd_lock);
new->cred = tmp->cred;
- tmp->cred.cr_group_info = NULL;
- new->cred.cr_principal = tmp->cred.cr_principal;
- tmp->cred.cr_principal = NULL;
+ init_svc_cred(&tmp->cred);
}
static struct cache_head *
@@ -487,7 +484,7 @@ static int rsc_parse(struct cache_detail *cd,
len = qword_get(&mesg, buf, mlen);
if (len < 0)
goto out;
- gm = gss_mech_get_by_name(buf);
+ gm = rsci.cred.cr_gss_mech = gss_mech_get_by_name(buf);
status = -EOPNOTSUPP;
if (!gm)
goto out;
@@ -517,7 +514,6 @@ static int rsc_parse(struct cache_detail *cd,
rscp = rsc_update(cd, &rsci, rscp);
status = 0;
out:
- gss_mech_put(gm);
rsc_free(&rsci);
if (rscp)
cache_put(&rscp->h, cd);
diff --git a/net/sunrpc/cache.c b/net/sunrpc/cache.c
index 80fe5c86efd1..49eb37010aa3 100644
--- a/net/sunrpc/cache.c
+++ b/net/sunrpc/cache.c
@@ -50,12 +50,6 @@ static void cache_init(struct cache_head *h)
h->last_refresh = now;
}
-static inline int cache_is_expired(struct cache_detail *detail, struct cache_head *h)
-{
- return (h->expiry_time < seconds_since_boot()) ||
- (detail->flush_time > h->last_refresh);
-}
-
struct cache_head *sunrpc_cache_lookup(struct cache_detail *detail,
struct cache_head *key, int hash)
{
@@ -201,7 +195,7 @@ static int cache_make_upcall(struct cache_detail *cd, struct cache_head *h)
return sunrpc_cache_pipe_upcall(cd, h);
}
-static inline int cache_is_valid(struct cache_detail *detail, struct cache_head *h)
+static inline int cache_is_valid(struct cache_head *h)
{
if (!test_bit(CACHE_VALID, &h->flags))
return -EAGAIN;
@@ -227,16 +221,15 @@ static int try_to_negate_entry(struct cache_detail *detail, struct cache_head *h
int rv;
write_lock(&detail->hash_lock);
- rv = cache_is_valid(detail, h);
- if (rv != -EAGAIN) {
- write_unlock(&detail->hash_lock);
- return rv;
+ rv = cache_is_valid(h);
+ if (rv == -EAGAIN) {
+ set_bit(CACHE_NEGATIVE, &h->flags);
+ cache_fresh_locked(h, seconds_since_boot()+CACHE_NEW_EXPIRY);
+ rv = -ENOENT;
}
- set_bit(CACHE_NEGATIVE, &h->flags);
- cache_fresh_locked(h, seconds_since_boot()+CACHE_NEW_EXPIRY);
write_unlock(&detail->hash_lock);
cache_fresh_unlocked(h, detail);
- return -ENOENT;
+ return rv;
}
/*
@@ -260,7 +253,7 @@ int cache_check(struct cache_detail *detail,
long refresh_age, age;
/* First decide return status as best we can */
- rv = cache_is_valid(detail, h);
+ rv = cache_is_valid(h);
/* now see if we want to start an upcall */
refresh_age = (h->expiry_time - h->last_refresh);
@@ -269,19 +262,17 @@ int cache_check(struct cache_detail *detail,
if (rqstp == NULL) {
if (rv == -EAGAIN)
rv = -ENOENT;
- } else if (rv == -EAGAIN || age > refresh_age/2) {
+ } else if (rv == -EAGAIN ||
+ (h->expiry_time != 0 && age > refresh_age/2)) {
dprintk("RPC: Want update, refage=%ld, age=%ld\n",
refresh_age, age);
if (!test_and_set_bit(CACHE_PENDING, &h->flags)) {
switch (cache_make_upcall(detail, h)) {
case -EINVAL:
- clear_bit(CACHE_PENDING, &h->flags);
- cache_revisit_request(h);
rv = try_to_negate_entry(detail, h);
break;
case -EAGAIN:
- clear_bit(CACHE_PENDING, &h->flags);
- cache_revisit_request(h);
+ cache_fresh_unlocked(h, detail);
break;
}
}
@@ -293,7 +284,7 @@ int cache_check(struct cache_detail *detail,
* Request was not deferred; handle it as best
* we can ourselves:
*/
- rv = cache_is_valid(detail, h);
+ rv = cache_is_valid(h);
if (rv == -EAGAIN)
rv = -ETIMEDOUT;
}
@@ -310,7 +301,7 @@ EXPORT_SYMBOL_GPL(cache_check);
* a current pointer into that list and into the table
* for that entry.
*
- * Each time clean_cache is called it finds the next non-empty entry
+ * Each time cache_clean is called it finds the next non-empty entry
* in the current table and walks the list in that entry
* looking for entries that can be removed.
*
@@ -457,9 +448,8 @@ static int cache_clean(void)
current_index ++;
spin_unlock(&cache_list_lock);
if (ch) {
- if (test_and_clear_bit(CACHE_PENDING, &ch->flags))
- cache_dequeue(current_detail, ch);
- cache_revisit_request(ch);
+ set_bit(CACHE_CLEANED, &ch->flags);
+ cache_fresh_unlocked(ch, d);
cache_put(ch, d);
}
} else
@@ -1036,23 +1026,32 @@ static int cache_release(struct inode *inode, struct file *filp,
static void cache_dequeue(struct cache_detail *detail, struct cache_head *ch)
{
- struct cache_queue *cq;
+ struct cache_queue *cq, *tmp;
+ struct cache_request *cr;
+ struct list_head dequeued;
+
+ INIT_LIST_HEAD(&dequeued);
spin_lock(&queue_lock);
- list_for_each_entry(cq, &detail->queue, list)
+ list_for_each_entry_safe(cq, tmp, &detail->queue, list)
if (!cq->reader) {
- struct cache_request *cr = container_of(cq, struct cache_request, q);
+ cr = container_of(cq, struct cache_request, q);
if (cr->item != ch)
continue;
+ if (test_bit(CACHE_PENDING, &ch->flags))
+ /* Lost a race and it is pending again */
+ break;
if (cr->readers != 0)
continue;
- list_del(&cr->q.list);
- spin_unlock(&queue_lock);
- cache_put(cr->item, detail);
- kfree(cr->buf);
- kfree(cr);
- return;
+ list_move(&cr->q.list, &dequeued);
}
spin_unlock(&queue_lock);
+ while (!list_empty(&dequeued)) {
+ cr = list_entry(dequeued.next, struct cache_request, q.list);
+ list_del(&cr->q.list);
+ cache_put(cr->item, detail);
+ kfree(cr->buf);
+ kfree(cr);
+ }
}
/*
@@ -1166,6 +1165,7 @@ int sunrpc_cache_pipe_upcall(struct cache_detail *detail, struct cache_head *h)
char *buf;
struct cache_request *crq;
+ int ret = 0;
if (!detail->cache_request)
return -EINVAL;
@@ -1174,6 +1174,9 @@ int sunrpc_cache_pipe_upcall(struct cache_detail *detail, struct cache_head *h)
warn_no_listener(detail);
return -EINVAL;
}
+ if (test_bit(CACHE_CLEANED, &h->flags))
+ /* Too late to make an upcall */
+ return -EAGAIN;
buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
if (!buf)
@@ -1191,10 +1194,18 @@ int sunrpc_cache_pipe_upcall(struct cache_detail *detail, struct cache_head *h)
crq->len = 0;
crq->readers = 0;
spin_lock(&queue_lock);
- list_add_tail(&crq->q.list, &detail->queue);
+ if (test_bit(CACHE_PENDING, &h->flags))
+ list_add_tail(&crq->q.list, &detail->queue);
+ else
+ /* Lost a race, no longer PENDING, so don't enqueue */
+ ret = -EAGAIN;
spin_unlock(&queue_lock);
wake_up(&queue_wait);
- return 0;
+ if (ret == -EAGAIN) {
+ kfree(buf);
+ kfree(crq);
+ }
+ return ret;
}
EXPORT_SYMBOL_GPL(sunrpc_cache_pipe_upcall);
diff --git a/net/sunrpc/clnt.c b/net/sunrpc/clnt.c
index f0339ae9bf37..aa401560777b 100644
--- a/net/sunrpc/clnt.c
+++ b/net/sunrpc/clnt.c
@@ -290,7 +290,7 @@ static int rpc_client_register(const struct rpc_create_args *args,
struct rpc_auth *auth;
struct net *net = rpc_net_ns(clnt);
struct super_block *pipefs_sb;
- int err = 0;
+ int err;
pipefs_sb = rpc_get_sb_net(net);
if (pipefs_sb) {
@@ -299,6 +299,10 @@ static int rpc_client_register(const struct rpc_create_args *args,
goto out;
}
+ rpc_register_client(clnt);
+ if (pipefs_sb)
+ rpc_put_sb_net(net);
+
auth = rpcauth_create(args->authflavor, clnt);
if (IS_ERR(auth)) {
dprintk("RPC: Couldn't create auth handle (flavor %u)\n",
@@ -306,16 +310,14 @@ static int rpc_client_register(const struct rpc_create_args *args,
err = PTR_ERR(auth);
goto err_auth;
}
-
- rpc_register_client(clnt);
+ return 0;
+err_auth:
+ pipefs_sb = rpc_get_sb_net(net);
+ __rpc_clnt_remove_pipedir(clnt);
out:
if (pipefs_sb)
rpc_put_sb_net(net);
return err;
-
-err_auth:
- __rpc_clnt_remove_pipedir(clnt);
- goto out;
}
static struct rpc_clnt * rpc_new_client(const struct rpc_create_args *args, struct rpc_xprt *xprt)
diff --git a/net/sunrpc/rpc_pipe.c b/net/sunrpc/rpc_pipe.c
index 4679df5a6d50..61239a2cb786 100644
--- a/net/sunrpc/rpc_pipe.c
+++ b/net/sunrpc/rpc_pipe.c
@@ -480,6 +480,23 @@ static const struct dentry_operations rpc_dentry_operations = {
.d_delete = rpc_delete_dentry,
};
+/*
+ * Lookup the data. This is trivial - if the dentry didn't already
+ * exist, we know it is negative.
+ */
+static struct dentry *
+rpc_lookup(struct inode *dir, struct dentry *dentry, unsigned int flags)
+{
+ if (dentry->d_name.len > NAME_MAX)
+ return ERR_PTR(-ENAMETOOLONG);
+ d_add(dentry, NULL);
+ return NULL;
+}
+
+static const struct inode_operations rpc_dir_inode_operations = {
+ .lookup = rpc_lookup,
+};
+
static struct inode *
rpc_get_inode(struct super_block *sb, umode_t mode)
{
@@ -492,7 +509,7 @@ rpc_get_inode(struct super_block *sb, umode_t mode)
switch (mode & S_IFMT) {
case S_IFDIR:
inode->i_fop = &simple_dir_operations;
- inode->i_op = &simple_dir_inode_operations;
+ inode->i_op = &rpc_dir_inode_operations;
inc_nlink(inode);
default:
break;
@@ -666,11 +683,8 @@ static struct dentry *__rpc_lookup_create_exclusive(struct dentry *parent,
if (!dentry)
return ERR_PTR(-ENOMEM);
}
- if (dentry->d_inode == NULL) {
- if (!dentry->d_op)
- d_set_d_op(dentry, &rpc_dentry_operations);
+ if (dentry->d_inode == NULL)
return dentry;
- }
dput(dentry);
return ERR_PTR(-EEXIST);
}
@@ -1117,6 +1131,7 @@ rpc_fill_super(struct super_block *sb, void *data, int silent)
sb->s_blocksize_bits = PAGE_CACHE_SHIFT;
sb->s_magic = RPCAUTH_GSSMAGIC;
sb->s_op = &s_ops;
+ sb->s_d_op = &rpc_dentry_operations;
sb->s_time_gran = 1;
inode = rpc_get_inode(sb, S_IFDIR | S_IRUGO | S_IXUGO);
diff --git a/net/sunrpc/svcauth_unix.c b/net/sunrpc/svcauth_unix.c
index 06bdf5a1082c..621ca7b4a155 100644
--- a/net/sunrpc/svcauth_unix.c
+++ b/net/sunrpc/svcauth_unix.c
@@ -347,13 +347,13 @@ ip_map_cached_get(struct svc_xprt *xprt)
spin_lock(&xprt->xpt_lock);
ipm = xprt->xpt_auth_cache;
if (ipm != NULL) {
- if (!cache_valid(&ipm->h)) {
+ sn = net_generic(xprt->xpt_net, sunrpc_net_id);
+ if (cache_is_expired(sn->ip_map_cache, &ipm->h)) {
/*
* The entry has been invalidated since it was
* remembered, e.g. by a second mount from the
* same IP address.
*/
- sn = net_generic(xprt->xpt_net, sunrpc_net_id);
xprt->xpt_auth_cache = NULL;
spin_unlock(&xprt->xpt_lock);
cache_put(&ipm->h, sn->ip_map_cache);
@@ -493,8 +493,6 @@ static int unix_gid_parse(struct cache_detail *cd,
if (rv)
return -EINVAL;
uid = make_kuid(&init_user_ns, id);
- if (!uid_valid(uid))
- return -EINVAL;
ug.uid = uid;
expiry = get_expiry(&mesg);
diff --git a/net/sunrpc/svcsock.c b/net/sunrpc/svcsock.c
index 0f679df7d072..305374d4fb98 100644
--- a/net/sunrpc/svcsock.c
+++ b/net/sunrpc/svcsock.c
@@ -917,7 +917,10 @@ static void svc_tcp_clear_pages(struct svc_sock *svsk)
len = svsk->sk_datalen;
npages = (len + PAGE_SIZE - 1) >> PAGE_SHIFT;
for (i = 0; i < npages; i++) {
- BUG_ON(svsk->sk_pages[i] == NULL);
+ if (svsk->sk_pages[i] == NULL) {
+ WARN_ON_ONCE(1);
+ continue;
+ }
put_page(svsk->sk_pages[i]);
svsk->sk_pages[i] = NULL;
}
@@ -1092,8 +1095,10 @@ static int svc_tcp_recvfrom(struct svc_rqst *rqstp)
goto err_noclose;
}
- if (svc_sock_reclen(svsk) < 8)
+ if (svsk->sk_datalen < 8) {
+ svsk->sk_datalen = 0;
goto err_delete; /* client is nuts. */
+ }
rqstp->rq_arg.len = svsk->sk_datalen;
rqstp->rq_arg.page_base = 0;
diff --git a/net/sunrpc/xprtsock.c b/net/sunrpc/xprtsock.c
index 412de7cfcc80..ddf0602603bd 100644
--- a/net/sunrpc/xprtsock.c
+++ b/net/sunrpc/xprtsock.c
@@ -2534,7 +2534,6 @@ static struct rpc_xprt_ops bc_tcp_ops = {
.reserve_xprt = xprt_reserve_xprt,
.release_xprt = xprt_release_xprt,
.alloc_slot = xprt_alloc_slot,
- .rpcbind = xs_local_rpcbind,
.buf_alloc = bc_malloc,
.buf_free = bc_free,
.send_request = bc_send_request,

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