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-rw-r--r--net/sunrpc/addr.c2
-rw-r--r--net/sunrpc/auth.c49
-rw-r--r--net/sunrpc/auth_gss/auth_gss.c1
-rw-r--r--net/sunrpc/auth_gss/gss_mech_switch.c29
-rw-r--r--net/sunrpc/clnt.c1
-rw-r--r--net/sunrpc/sched.c4
-rw-r--r--net/sunrpc/xdr.c2
-rw-r--r--net/sunrpc/xprtrdma/backchannel.c4
-rw-r--r--net/sunrpc/xprtrdma/frwr_ops.c104
-rw-r--r--net/sunrpc/xprtrdma/rpc_rdma.c20
-rw-r--r--net/sunrpc/xprtrdma/transport.c17
-rw-r--r--net/sunrpc/xprtrdma/verbs.c213
-rw-r--r--net/sunrpc/xprtrdma/xprt_rdma.h14
13 files changed, 199 insertions, 261 deletions
diff --git a/net/sunrpc/addr.c b/net/sunrpc/addr.c
index d024af4be85e..8b4d72b1a066 100644
--- a/net/sunrpc/addr.c
+++ b/net/sunrpc/addr.c
@@ -175,7 +175,7 @@ static int rpc_parse_scope_id(struct net *net, const char *buf,
return 0;
len = (buf + buflen) - delim - 1;
- p = kstrndup(delim + 1, len, GFP_KERNEL);
+ p = kmemdup_nul(delim + 1, len, GFP_KERNEL);
if (p) {
u32 scope_id = 0;
struct net_device *dev;
diff --git a/net/sunrpc/auth.c b/net/sunrpc/auth.c
index cdb05b48de44..5748ad0ba1bd 100644
--- a/net/sunrpc/auth.c
+++ b/net/sunrpc/auth.c
@@ -221,55 +221,6 @@ rpcauth_get_gssinfo(rpc_authflavor_t pseudoflavor, struct rpcsec_gss_info *info)
}
EXPORT_SYMBOL_GPL(rpcauth_get_gssinfo);
-/**
- * rpcauth_list_flavors - discover registered flavors and pseudoflavors
- * @array: array to fill in
- * @size: size of "array"
- *
- * Returns the number of array items filled in, or a negative errno.
- *
- * The returned array is not sorted by any policy. Callers should not
- * rely on the order of the items in the returned array.
- */
-int
-rpcauth_list_flavors(rpc_authflavor_t *array, int size)
-{
- const struct rpc_authops *ops;
- rpc_authflavor_t flavor, pseudos[4];
- int i, len, result = 0;
-
- rcu_read_lock();
- for (flavor = 0; flavor < RPC_AUTH_MAXFLAVOR; flavor++) {
- ops = rcu_dereference(auth_flavors[flavor]);
- if (result >= size) {
- result = -ENOMEM;
- break;
- }
-
- if (ops == NULL)
- continue;
- if (ops->list_pseudoflavors == NULL) {
- array[result++] = ops->au_flavor;
- continue;
- }
- len = ops->list_pseudoflavors(pseudos, ARRAY_SIZE(pseudos));
- if (len < 0) {
- result = len;
- break;
- }
- for (i = 0; i < len; i++) {
- if (result >= size) {
- result = -ENOMEM;
- break;
- }
- array[result++] = pseudos[i];
- }
- }
- rcu_read_unlock();
- return result;
-}
-EXPORT_SYMBOL_GPL(rpcauth_list_flavors);
-
struct rpc_auth *
rpcauth_create(const struct rpc_auth_create_args *args, struct rpc_clnt *clnt)
{
diff --git a/net/sunrpc/auth_gss/auth_gss.c b/net/sunrpc/auth_gss/auth_gss.c
index d75fddca44c9..24ca861815b1 100644
--- a/net/sunrpc/auth_gss/auth_gss.c
+++ b/net/sunrpc/auth_gss/auth_gss.c
@@ -2118,7 +2118,6 @@ static const struct rpc_authops authgss_ops = {
.hash_cred = gss_hash_cred,
.lookup_cred = gss_lookup_cred,
.crcreate = gss_create_cred,
- .list_pseudoflavors = gss_mech_list_pseudoflavors,
.info2flavor = gss_mech_info2flavor,
.flavor2info = gss_mech_flavor2info,
};
diff --git a/net/sunrpc/auth_gss/gss_mech_switch.c b/net/sunrpc/auth_gss/gss_mech_switch.c
index d3685d4ed9e0..db550bfc2642 100644
--- a/net/sunrpc/auth_gss/gss_mech_switch.c
+++ b/net/sunrpc/auth_gss/gss_mech_switch.c
@@ -220,35 +220,6 @@ gss_mech_get_by_pseudoflavor(u32 pseudoflavor)
}
/**
- * gss_mech_list_pseudoflavors - Discover registered GSS pseudoflavors
- * @array_ptr: array to fill in
- * @size: size of "array"
- *
- * Returns the number of array items filled in, or a negative errno.
- *
- * The returned array is not sorted by any policy. Callers should not
- * rely on the order of the items in the returned array.
- */
-int gss_mech_list_pseudoflavors(rpc_authflavor_t *array_ptr, int size)
-{
- struct gss_api_mech *pos = NULL;
- int j, i = 0;
-
- rcu_read_lock();
- list_for_each_entry_rcu(pos, &registered_mechs, gm_list) {
- for (j = 0; j < pos->gm_pf_num; j++) {
- if (i >= size) {
- spin_unlock(&registered_mechs_lock);
- return -ENOMEM;
- }
- array_ptr[i++] = pos->gm_pfs[j].pseudoflavor;
- }
- }
- rcu_read_unlock();
- return i;
-}
-
-/**
* gss_svc_to_pseudoflavor - map a GSS service number to a pseudoflavor
* @gm: GSS mechanism handle
* @qop: GSS quality-of-protection value
diff --git a/net/sunrpc/clnt.c b/net/sunrpc/clnt.c
index a3379765605d..7324b21f923e 100644
--- a/net/sunrpc/clnt.c
+++ b/net/sunrpc/clnt.c
@@ -2130,6 +2130,7 @@ call_connect_status(struct rpc_task *task)
case -ENETUNREACH:
case -EHOSTUNREACH:
case -EPIPE:
+ case -EPROTO:
xprt_conditional_disconnect(task->tk_rqstp->rq_xprt,
task->tk_rqstp->rq_connect_cookie);
if (RPC_IS_SOFTCONN(task))
diff --git a/net/sunrpc/sched.c b/net/sunrpc/sched.c
index 9c79548c6847..55e900255b0c 100644
--- a/net/sunrpc/sched.c
+++ b/net/sunrpc/sched.c
@@ -846,6 +846,8 @@ void rpc_signal_task(struct rpc_task *task)
if (!RPC_IS_ACTIVATED(task))
return;
+
+ trace_rpc_task_signalled(task, task->tk_action);
set_bit(RPC_TASK_SIGNALLED, &task->tk_runstate);
smp_mb__after_atomic();
queue = READ_ONCE(task->tk_waitqueue);
@@ -949,7 +951,7 @@ static void __rpc_execute(struct rpc_task *task)
* clean up after sleeping on some queue, we don't
* break the loop here, but go around once more.
*/
- dprintk("RPC: %5u got signal\n", task->tk_pid);
+ trace_rpc_task_signalled(task, task->tk_action);
set_bit(RPC_TASK_SIGNALLED, &task->tk_runstate);
task->tk_rpc_status = -ERESTARTSYS;
rpc_exit(task, -ERESTARTSYS);
diff --git a/net/sunrpc/xdr.c b/net/sunrpc/xdr.c
index f3104be8ff5d..e5497dc2475b 100644
--- a/net/sunrpc/xdr.c
+++ b/net/sunrpc/xdr.c
@@ -1079,7 +1079,7 @@ void xdr_enter_page(struct xdr_stream *xdr, unsigned int len)
}
EXPORT_SYMBOL_GPL(xdr_enter_page);
-static struct kvec empty_iov = {.iov_base = NULL, .iov_len = 0};
+static const struct kvec empty_iov = {.iov_base = NULL, .iov_len = 0};
void
xdr_buf_from_iov(struct kvec *iov, struct xdr_buf *buf)
diff --git a/net/sunrpc/xprtrdma/backchannel.c b/net/sunrpc/xprtrdma/backchannel.c
index 9d02eae353c6..1a0ae0c61353 100644
--- a/net/sunrpc/xprtrdma/backchannel.c
+++ b/net/sunrpc/xprtrdma/backchannel.c
@@ -194,6 +194,10 @@ create_req:
req = rpcrdma_req_create(r_xprt, size, GFP_KERNEL);
if (!req)
return NULL;
+ if (rpcrdma_req_setup(r_xprt, req)) {
+ rpcrdma_req_destroy(req);
+ return NULL;
+ }
xprt->bc_alloc_count++;
rqst = &req->rl_slot;
diff --git a/net/sunrpc/xprtrdma/frwr_ops.c b/net/sunrpc/xprtrdma/frwr_ops.c
index 523722be6a16..095be887753e 100644
--- a/net/sunrpc/xprtrdma/frwr_ops.c
+++ b/net/sunrpc/xprtrdma/frwr_ops.c
@@ -51,28 +51,6 @@
#endif
/**
- * frwr_is_supported - Check if device supports FRWR
- * @device: interface adapter to check
- *
- * Returns true if device supports FRWR, otherwise false
- */
-bool frwr_is_supported(struct ib_device *device)
-{
- struct ib_device_attr *attrs = &device->attrs;
-
- if (!(attrs->device_cap_flags & IB_DEVICE_MEM_MGT_EXTENSIONS))
- goto out_not_supported;
- if (attrs->max_fast_reg_page_list_len == 0)
- goto out_not_supported;
- return true;
-
-out_not_supported:
- pr_info("rpcrdma: 'frwr' mode is not supported by device %s\n",
- device->name);
- return false;
-}
-
-/**
* frwr_release_mr - Destroy one MR
* @mr: MR allocated by frwr_init_mr
*
@@ -170,26 +148,48 @@ out_list_err:
}
/**
- * frwr_open - Prepare an endpoint for use with FRWR
- * @ia: interface adapter this endpoint will use
- * @ep: endpoint to prepare
+ * frwr_query_device - Prepare a transport for use with FRWR
+ * @r_xprt: controlling transport instance
+ * @device: RDMA device to query
*
* On success, sets:
- * ep->rep_attr.cap.max_send_wr
- * ep->rep_attr.cap.max_recv_wr
+ * ep->rep_attr
* ep->rep_max_requests
- * ia->ri_max_segs
+ * ia->ri_max_rdma_segs
*
* And these FRWR-related fields:
* ia->ri_max_frwr_depth
* ia->ri_mrtype
*
- * On failure, a negative errno is returned.
+ * Return values:
+ * On success, returns zero.
+ * %-EINVAL - the device does not support FRWR memory registration
+ * %-ENOMEM - the device is not sufficiently capable for NFS/RDMA
*/
-int frwr_open(struct rpcrdma_ia *ia, struct rpcrdma_ep *ep)
+int frwr_query_device(struct rpcrdma_xprt *r_xprt,
+ const struct ib_device *device)
{
- struct ib_device_attr *attrs = &ia->ri_id->device->attrs;
+ const struct ib_device_attr *attrs = &device->attrs;
+ struct rpcrdma_ia *ia = &r_xprt->rx_ia;
+ struct rpcrdma_ep *ep = &r_xprt->rx_ep;
int max_qp_wr, depth, delta;
+ unsigned int max_sge;
+
+ if (!(attrs->device_cap_flags & IB_DEVICE_MEM_MGT_EXTENSIONS) ||
+ attrs->max_fast_reg_page_list_len == 0) {
+ pr_err("rpcrdma: 'frwr' mode is not supported by device %s\n",
+ device->name);
+ return -EINVAL;
+ }
+
+ max_sge = min_t(unsigned int, attrs->max_send_sge,
+ RPCRDMA_MAX_SEND_SGES);
+ if (max_sge < RPCRDMA_MIN_SEND_SGES) {
+ pr_err("rpcrdma: HCA provides only %u send SGEs\n", max_sge);
+ return -ENOMEM;
+ }
+ ep->rep_attr.cap.max_send_sge = max_sge;
+ ep->rep_attr.cap.max_recv_sge = 1;
ia->ri_mrtype = IB_MR_TYPE_MEM_REG;
if (attrs->device_cap_flags & IB_DEVICE_SG_GAPS_REG)
@@ -199,14 +199,12 @@ int frwr_open(struct rpcrdma_ia *ia, struct rpcrdma_ep *ep)
* capability, but perform optimally when the MRs are not larger
* than a page.
*/
- if (attrs->max_sge_rd > 1)
+ if (attrs->max_sge_rd > RPCRDMA_MAX_HDR_SEGS)
ia->ri_max_frwr_depth = attrs->max_sge_rd;
else
ia->ri_max_frwr_depth = attrs->max_fast_reg_page_list_len;
if (ia->ri_max_frwr_depth > RPCRDMA_MAX_DATA_SEGS)
ia->ri_max_frwr_depth = RPCRDMA_MAX_DATA_SEGS;
- dprintk("RPC: %s: max FR page list depth = %u\n",
- __func__, ia->ri_max_frwr_depth);
/* Add room for frwr register and invalidate WRs.
* 1. FRWR reg WR for head
@@ -230,7 +228,7 @@ int frwr_open(struct rpcrdma_ia *ia, struct rpcrdma_ep *ep)
} while (delta > 0);
}
- max_qp_wr = ia->ri_id->device->attrs.max_qp_wr;
+ max_qp_wr = attrs->max_qp_wr;
max_qp_wr -= RPCRDMA_BACKWARD_WRS;
max_qp_wr -= 1;
if (max_qp_wr < RPCRDMA_MIN_SLOT_TABLE)
@@ -241,7 +239,7 @@ int frwr_open(struct rpcrdma_ia *ia, struct rpcrdma_ep *ep)
if (ep->rep_attr.cap.max_send_wr > max_qp_wr) {
ep->rep_max_requests = max_qp_wr / depth;
if (!ep->rep_max_requests)
- return -EINVAL;
+ return -ENOMEM;
ep->rep_attr.cap.max_send_wr = ep->rep_max_requests * depth;
}
ep->rep_attr.cap.max_send_wr += RPCRDMA_BACKWARD_WRS;
@@ -250,30 +248,22 @@ int frwr_open(struct rpcrdma_ia *ia, struct rpcrdma_ep *ep)
ep->rep_attr.cap.max_recv_wr += RPCRDMA_BACKWARD_WRS;
ep->rep_attr.cap.max_recv_wr += 1; /* for ib_drain_rq */
- ia->ri_max_segs =
+ ia->ri_max_rdma_segs =
DIV_ROUND_UP(RPCRDMA_MAX_DATA_SEGS, ia->ri_max_frwr_depth);
/* Reply chunks require segments for head and tail buffers */
- ia->ri_max_segs += 2;
- if (ia->ri_max_segs > RPCRDMA_MAX_HDR_SEGS)
- ia->ri_max_segs = RPCRDMA_MAX_HDR_SEGS;
- return 0;
-}
-
-/**
- * frwr_maxpages - Compute size of largest payload
- * @r_xprt: transport
- *
- * Returns maximum size of an RPC message, in pages.
- *
- * FRWR mode conveys a list of pages per chunk segment. The
- * maximum length of that list is the FRWR page list depth.
- */
-size_t frwr_maxpages(struct rpcrdma_xprt *r_xprt)
-{
- struct rpcrdma_ia *ia = &r_xprt->rx_ia;
+ ia->ri_max_rdma_segs += 2;
+ if (ia->ri_max_rdma_segs > RPCRDMA_MAX_HDR_SEGS)
+ ia->ri_max_rdma_segs = RPCRDMA_MAX_HDR_SEGS;
+
+ /* Ensure the underlying device is capable of conveying the
+ * largest r/wsize NFS will ask for. This guarantees that
+ * failing over from one RDMA device to another will not
+ * break NFS I/O.
+ */
+ if ((ia->ri_max_rdma_segs * ia->ri_max_frwr_depth) < RPCRDMA_MAX_SEGS)
+ return -ENOMEM;
- return min_t(unsigned int, RPCRDMA_MAX_DATA_SEGS,
- (ia->ri_max_segs - 2) * ia->ri_max_frwr_depth);
+ return 0;
}
/**
diff --git a/net/sunrpc/xprtrdma/rpc_rdma.c b/net/sunrpc/xprtrdma/rpc_rdma.c
index aec3beb93b25..28020ec104d4 100644
--- a/net/sunrpc/xprtrdma/rpc_rdma.c
+++ b/net/sunrpc/xprtrdma/rpc_rdma.c
@@ -111,7 +111,7 @@ static unsigned int rpcrdma_max_reply_header_size(unsigned int maxsegs)
*/
void rpcrdma_set_max_header_sizes(struct rpcrdma_xprt *r_xprt)
{
- unsigned int maxsegs = r_xprt->rx_ia.ri_max_segs;
+ unsigned int maxsegs = r_xprt->rx_ia.ri_max_rdma_segs;
struct rpcrdma_ep *ep = &r_xprt->rx_ep;
ep->rep_max_inline_send =
@@ -145,7 +145,7 @@ static bool rpcrdma_args_inline(struct rpcrdma_xprt *r_xprt,
remaining -= min_t(unsigned int,
PAGE_SIZE - offset, remaining);
offset = 0;
- if (++count > r_xprt->rx_ia.ri_max_send_sges)
+ if (++count > r_xprt->rx_ep.rep_attr.cap.max_send_sge)
return false;
}
}
@@ -580,22 +580,19 @@ void rpcrdma_sendctx_unmap(struct rpcrdma_sendctx *sc)
/* Prepare an SGE for the RPC-over-RDMA transport header.
*/
-static bool rpcrdma_prepare_hdr_sge(struct rpcrdma_xprt *r_xprt,
+static void rpcrdma_prepare_hdr_sge(struct rpcrdma_xprt *r_xprt,
struct rpcrdma_req *req, u32 len)
{
struct rpcrdma_sendctx *sc = req->rl_sendctx;
struct rpcrdma_regbuf *rb = req->rl_rdmabuf;
struct ib_sge *sge = &sc->sc_sges[req->rl_wr.num_sge++];
- if (!rpcrdma_regbuf_dma_map(r_xprt, rb))
- return false;
sge->addr = rdmab_addr(rb);
sge->length = len;
sge->lkey = rdmab_lkey(rb);
ib_dma_sync_single_for_device(rdmab_device(rb), sge->addr, sge->length,
DMA_TO_DEVICE);
- return true;
}
/* The head iovec is straightforward, as it is usually already
@@ -836,10 +833,9 @@ inline int rpcrdma_prepare_send_sges(struct rpcrdma_xprt *r_xprt,
req->rl_wr.num_sge = 0;
req->rl_wr.opcode = IB_WR_SEND;
- ret = -EIO;
- if (!rpcrdma_prepare_hdr_sge(r_xprt, req, hdrlen))
- goto out_unmap;
+ rpcrdma_prepare_hdr_sge(r_xprt, req, hdrlen);
+ ret = -EIO;
switch (rtype) {
case rpcrdma_noch_pullup:
if (!rpcrdma_prepare_noch_pullup(r_xprt, req, xdr))
@@ -909,7 +905,7 @@ rpcrdma_marshal_req(struct rpcrdma_xprt *r_xprt, struct rpc_rqst *rqst)
goto out_err;
*p++ = rqst->rq_xid;
*p++ = rpcrdma_version;
- *p++ = cpu_to_be32(r_xprt->rx_buf.rb_max_requests);
+ *p++ = r_xprt->rx_buf.rb_max_requests;
/* When the ULP employs a GSS flavor that guarantees integrity
* or privacy, direct data placement of individual data items
@@ -1480,8 +1476,8 @@ void rpcrdma_reply_handler(struct rpcrdma_rep *rep)
if (credits == 0)
credits = 1; /* don't deadlock */
- else if (credits > buf->rb_max_requests)
- credits = buf->rb_max_requests;
+ else if (credits > r_xprt->rx_ep.rep_max_requests)
+ credits = r_xprt->rx_ep.rep_max_requests;
if (buf->rb_credits != credits)
rpcrdma_update_cwnd(r_xprt, credits);
rpcrdma_post_recvs(r_xprt, false);
diff --git a/net/sunrpc/xprtrdma/transport.c b/net/sunrpc/xprtrdma/transport.c
index 7395eb2cfdeb..3cfeba68ee9a 100644
--- a/net/sunrpc/xprtrdma/transport.c
+++ b/net/sunrpc/xprtrdma/transport.c
@@ -316,7 +316,8 @@ xprt_setup_rdma(struct xprt_create *args)
if (args->addrlen > sizeof(xprt->addr))
return ERR_PTR(-EBADF);
- xprt = xprt_alloc(args->net, sizeof(struct rpcrdma_xprt), 0, 0);
+ xprt = xprt_alloc(args->net, sizeof(struct rpcrdma_xprt), 0,
+ xprt_rdma_slot_table_entries);
if (!xprt)
return ERR_PTR(-ENOMEM);
@@ -358,19 +359,13 @@ xprt_setup_rdma(struct xprt_create *args)
if (rc)
goto out3;
- INIT_DELAYED_WORK(&new_xprt->rx_connect_worker,
- xprt_rdma_connect_worker);
-
- xprt->max_payload = frwr_maxpages(new_xprt);
- if (xprt->max_payload == 0)
- goto out4;
- xprt->max_payload <<= PAGE_SHIFT;
- dprintk("RPC: %s: transport data payload maximum: %zu bytes\n",
- __func__, xprt->max_payload);
-
if (!try_module_get(THIS_MODULE))
goto out4;
+ INIT_DELAYED_WORK(&new_xprt->rx_connect_worker,
+ xprt_rdma_connect_worker);
+ xprt->max_payload = RPCRDMA_MAX_DATA_SEGS << PAGE_SHIFT;
+
dprintk("RPC: %s: %s:%s\n", __func__,
xprt->address_strings[RPC_DISPLAY_ADDR],
xprt->address_strings[RPC_DISPLAY_PORT]);
diff --git a/net/sunrpc/xprtrdma/verbs.c b/net/sunrpc/xprtrdma/verbs.c
index fda3889993cb..353f61ac8d51 100644
--- a/net/sunrpc/xprtrdma/verbs.c
+++ b/net/sunrpc/xprtrdma/verbs.c
@@ -74,9 +74,13 @@
/*
* internal functions
*/
+static int rpcrdma_sendctxs_create(struct rpcrdma_xprt *r_xprt);
+static void rpcrdma_sendctxs_destroy(struct rpcrdma_xprt *r_xprt);
static void rpcrdma_sendctx_put_locked(struct rpcrdma_xprt *r_xprt,
struct rpcrdma_sendctx *sc);
+static int rpcrdma_reqs_setup(struct rpcrdma_xprt *r_xprt);
static void rpcrdma_reqs_reset(struct rpcrdma_xprt *r_xprt);
+static void rpcrdma_rep_destroy(struct rpcrdma_rep *rep);
static void rpcrdma_reps_unmap(struct rpcrdma_xprt *r_xprt);
static void rpcrdma_mrs_create(struct rpcrdma_xprt *r_xprt);
static void rpcrdma_mrs_destroy(struct rpcrdma_xprt *r_xprt);
@@ -174,7 +178,7 @@ rpcrdma_wc_receive(struct ib_cq *cq, struct ib_wc *wc)
return;
out_flushed:
- rpcrdma_recv_buffer_put(rep);
+ rpcrdma_rep_destroy(rep);
}
static void rpcrdma_update_cm_private(struct rpcrdma_xprt *r_xprt,
@@ -366,18 +370,6 @@ rpcrdma_ia_open(struct rpcrdma_xprt *xprt)
goto out_err;
}
- switch (xprt_rdma_memreg_strategy) {
- case RPCRDMA_FRWR:
- if (frwr_is_supported(ia->ri_id->device))
- break;
- /*FALLTHROUGH*/
- default:
- pr_err("rpcrdma: Device %s does not support memreg mode %d\n",
- ia->ri_id->device->name, xprt_rdma_memreg_strategy);
- rc = -EINVAL;
- goto out_err;
- }
-
return 0;
out_err:
@@ -391,6 +383,8 @@ out_err:
*
* Divest transport H/W resources associated with this adapter,
* but allow it to be restored later.
+ *
+ * Caller must hold the transport send lock.
*/
void
rpcrdma_ia_remove(struct rpcrdma_ia *ia)
@@ -398,8 +392,6 @@ rpcrdma_ia_remove(struct rpcrdma_ia *ia)
struct rpcrdma_xprt *r_xprt = container_of(ia, struct rpcrdma_xprt,
rx_ia);
struct rpcrdma_ep *ep = &r_xprt->rx_ep;
- struct rpcrdma_buffer *buf = &r_xprt->rx_buf;
- struct rpcrdma_req *req;
/* This is similar to rpcrdma_ep_destroy, but:
* - Don't cancel the connect worker.
@@ -422,12 +414,9 @@ rpcrdma_ia_remove(struct rpcrdma_ia *ia)
* mappings and MRs are gone.
*/
rpcrdma_reps_unmap(r_xprt);
- list_for_each_entry(req, &buf->rb_allreqs, rl_all) {
- rpcrdma_regbuf_dma_unmap(req->rl_rdmabuf);
- rpcrdma_regbuf_dma_unmap(req->rl_sendbuf);
- rpcrdma_regbuf_dma_unmap(req->rl_recvbuf);
- }
+ rpcrdma_reqs_reset(r_xprt);
rpcrdma_mrs_destroy(r_xprt);
+ rpcrdma_sendctxs_destroy(r_xprt);
ib_dealloc_pd(ia->ri_pd);
ia->ri_pd = NULL;
@@ -470,30 +459,20 @@ int rpcrdma_ep_create(struct rpcrdma_xprt *r_xprt)
struct rpcrdma_ia *ia = &r_xprt->rx_ia;
struct rpcrdma_connect_private *pmsg = &ep->rep_cm_private;
struct ib_cq *sendcq, *recvcq;
- unsigned int max_sge;
int rc;
- ep->rep_max_requests = xprt_rdma_slot_table_entries;
+ ep->rep_max_requests = r_xprt->rx_xprt.max_reqs;
ep->rep_inline_send = xprt_rdma_max_inline_write;
ep->rep_inline_recv = xprt_rdma_max_inline_read;
- max_sge = min_t(unsigned int, ia->ri_id->device->attrs.max_send_sge,
- RPCRDMA_MAX_SEND_SGES);
- if (max_sge < RPCRDMA_MIN_SEND_SGES) {
- pr_warn("rpcrdma: HCA provides only %d send SGEs\n", max_sge);
- return -ENOMEM;
- }
- ia->ri_max_send_sges = max_sge;
-
- rc = frwr_open(ia, ep);
+ rc = frwr_query_device(r_xprt, ia->ri_id->device);
if (rc)
return rc;
+ r_xprt->rx_buf.rb_max_requests = cpu_to_be32(ep->rep_max_requests);
ep->rep_attr.event_handler = rpcrdma_qp_event_handler;
ep->rep_attr.qp_context = ep;
ep->rep_attr.srq = NULL;
- ep->rep_attr.cap.max_send_sge = max_sge;
- ep->rep_attr.cap.max_recv_sge = 1;
ep->rep_attr.cap.max_inline_data = 0;
ep->rep_attr.sq_sig_type = IB_SIGNAL_REQ_WR;
ep->rep_attr.qp_type = IB_QPT_RC;
@@ -716,6 +695,10 @@ retry:
rpcrdma_reset_cwnd(r_xprt);
rpcrdma_post_recvs(r_xprt, true);
+ rc = rpcrdma_sendctxs_create(r_xprt);
+ if (rc)
+ goto out;
+
rc = rdma_connect(ia->ri_id, &ep->rep_remote_cma);
if (rc)
goto out;
@@ -730,6 +713,11 @@ retry:
goto out;
}
+ rc = rpcrdma_reqs_setup(r_xprt);
+ if (rc) {
+ rpcrdma_ep_disconnect(ep, ia);
+ goto out;
+ }
rpcrdma_mrs_create(r_xprt);
out:
@@ -768,6 +756,7 @@ rpcrdma_ep_disconnect(struct rpcrdma_ep *ep, struct rpcrdma_ia *ia)
rpcrdma_xprt_drain(r_xprt);
rpcrdma_reqs_reset(r_xprt);
rpcrdma_mrs_destroy(r_xprt);
+ rpcrdma_sendctxs_destroy(r_xprt);
}
/* Fixed-size circular FIFO queue. This implementation is wait-free and
@@ -787,20 +776,24 @@ rpcrdma_ep_disconnect(struct rpcrdma_ep *ep, struct rpcrdma_ia *ia)
* queue activity, and rpcrdma_xprt_drain has flushed all remaining
* Send requests.
*/
-static void rpcrdma_sendctxs_destroy(struct rpcrdma_buffer *buf)
+static void rpcrdma_sendctxs_destroy(struct rpcrdma_xprt *r_xprt)
{
+ struct rpcrdma_buffer *buf = &r_xprt->rx_buf;
unsigned long i;
+ if (!buf->rb_sc_ctxs)
+ return;
for (i = 0; i <= buf->rb_sc_last; i++)
kfree(buf->rb_sc_ctxs[i]);
kfree(buf->rb_sc_ctxs);
+ buf->rb_sc_ctxs = NULL;
}
-static struct rpcrdma_sendctx *rpcrdma_sendctx_create(struct rpcrdma_ia *ia)
+static struct rpcrdma_sendctx *rpcrdma_sendctx_create(struct rpcrdma_ep *ep)
{
struct rpcrdma_sendctx *sc;
- sc = kzalloc(struct_size(sc, sc_sges, ia->ri_max_send_sges),
+ sc = kzalloc(struct_size(sc, sc_sges, ep->rep_attr.cap.max_send_sge),
GFP_KERNEL);
if (!sc)
return NULL;
@@ -820,21 +813,22 @@ static int rpcrdma_sendctxs_create(struct rpcrdma_xprt *r_xprt)
* the ->send_request call to fail temporarily before too many
* Sends are posted.
*/
- i = buf->rb_max_requests + RPCRDMA_MAX_BC_REQUESTS;
- dprintk("RPC: %s: allocating %lu send_ctxs\n", __func__, i);
+ i = r_xprt->rx_ep.rep_max_requests + RPCRDMA_MAX_BC_REQUESTS;
buf->rb_sc_ctxs = kcalloc(i, sizeof(sc), GFP_KERNEL);
if (!buf->rb_sc_ctxs)
return -ENOMEM;
buf->rb_sc_last = i - 1;
for (i = 0; i <= buf->rb_sc_last; i++) {
- sc = rpcrdma_sendctx_create(&r_xprt->rx_ia);
+ sc = rpcrdma_sendctx_create(&r_xprt->rx_ep);
if (!sc)
return -ENOMEM;
buf->rb_sc_ctxs[i] = sc;
}
+ buf->rb_sc_head = 0;
+ buf->rb_sc_tail = 0;
return 0;
}
@@ -933,7 +927,7 @@ rpcrdma_mrs_create(struct rpcrdma_xprt *r_xprt)
struct rpcrdma_ia *ia = &r_xprt->rx_ia;
unsigned int count;
- for (count = 0; count < ia->ri_max_segs; count++) {
+ for (count = 0; count < ia->ri_max_rdma_segs; count++) {
struct rpcrdma_mr *mr;
int rc;
@@ -1005,32 +999,19 @@ struct rpcrdma_req *rpcrdma_req_create(struct rpcrdma_xprt *r_xprt, size_t size,
gfp_t flags)
{
struct rpcrdma_buffer *buffer = &r_xprt->rx_buf;
- struct rpcrdma_regbuf *rb;
struct rpcrdma_req *req;
- size_t maxhdrsize;
req = kzalloc(sizeof(*req), flags);
if (req == NULL)
goto out1;
- /* Compute maximum header buffer size in bytes */
- maxhdrsize = rpcrdma_fixed_maxsz + 3 +
- r_xprt->rx_ia.ri_max_segs * rpcrdma_readchunk_maxsz;
- maxhdrsize *= sizeof(__be32);
- rb = rpcrdma_regbuf_alloc(__roundup_pow_of_two(maxhdrsize),
- DMA_TO_DEVICE, flags);
- if (!rb)
- goto out2;
- req->rl_rdmabuf = rb;
- xdr_buf_init(&req->rl_hdrbuf, rdmab_data(rb), rdmab_length(rb));
-
req->rl_sendbuf = rpcrdma_regbuf_alloc(size, DMA_TO_DEVICE, flags);
if (!req->rl_sendbuf)
- goto out3;
+ goto out2;
req->rl_recvbuf = rpcrdma_regbuf_alloc(size, DMA_NONE, flags);
if (!req->rl_recvbuf)
- goto out4;
+ goto out3;
INIT_LIST_HEAD(&req->rl_free_mrs);
INIT_LIST_HEAD(&req->rl_registered);
@@ -1039,10 +1020,8 @@ struct rpcrdma_req *rpcrdma_req_create(struct rpcrdma_xprt *r_xprt, size_t size,
spin_unlock(&buffer->rb_lock);
return req;
-out4:
- kfree(req->rl_sendbuf);
out3:
- kfree(req->rl_rdmabuf);
+ kfree(req->rl_sendbuf);
out2:
kfree(req);
out1:
@@ -1050,27 +1029,90 @@ out1:
}
/**
- * rpcrdma_reqs_reset - Reset all reqs owned by a transport
+ * rpcrdma_req_setup - Per-connection instance setup of an rpcrdma_req object
* @r_xprt: controlling transport instance
+ * @req: rpcrdma_req object to set up
*
- * ASSUMPTION: the rb_allreqs list is stable for the duration,
+ * Returns zero on success, and a negative errno on failure.
+ */
+int rpcrdma_req_setup(struct rpcrdma_xprt *r_xprt, struct rpcrdma_req *req)
+{
+ struct rpcrdma_regbuf *rb;
+ size_t maxhdrsize;
+
+ /* Compute maximum header buffer size in bytes */
+ maxhdrsize = rpcrdma_fixed_maxsz + 3 +
+ r_xprt->rx_ia.ri_max_rdma_segs * rpcrdma_readchunk_maxsz;
+ maxhdrsize *= sizeof(__be32);
+ rb = rpcrdma_regbuf_alloc(__roundup_pow_of_two(maxhdrsize),
+ DMA_TO_DEVICE, GFP_KERNEL);
+ if (!rb)
+ goto out;
+
+ if (!__rpcrdma_regbuf_dma_map(r_xprt, rb))
+ goto out_free;
+
+ req->rl_rdmabuf = rb;
+ xdr_buf_init(&req->rl_hdrbuf, rdmab_data(rb), rdmab_length(rb));
+ return 0;
+
+out_free:
+ rpcrdma_regbuf_free(rb);
+out:
+ return -ENOMEM;
+}
+
+/* ASSUMPTION: the rb_allreqs list is stable for the duration,
* and thus can be walked without holding rb_lock. Eg. the
* caller is holding the transport send lock to exclude
* device removal or disconnection.
*/
-static void rpcrdma_reqs_reset(struct rpcrdma_xprt *r_xprt)
+static int rpcrdma_reqs_setup(struct rpcrdma_xprt *r_xprt)
{
struct rpcrdma_buffer *buf = &r_xprt->rx_buf;
struct rpcrdma_req *req;
+ int rc;
list_for_each_entry(req, &buf->rb_allreqs, rl_all) {
- /* Credits are valid only for one connection */
- req->rl_slot.rq_cong = 0;
+ rc = rpcrdma_req_setup(r_xprt, req);
+ if (rc)
+ return rc;
}
+ return 0;
}
-static struct rpcrdma_rep *rpcrdma_rep_create(struct rpcrdma_xprt *r_xprt,
- bool temp)
+static void rpcrdma_req_reset(struct rpcrdma_req *req)
+{
+ /* Credits are valid for only one connection */
+ req->rl_slot.rq_cong = 0;
+
+ rpcrdma_regbuf_free(req->rl_rdmabuf);
+ req->rl_rdmabuf = NULL;
+
+ rpcrdma_regbuf_dma_unmap(req->rl_sendbuf);
+ rpcrdma_regbuf_dma_unmap(req->rl_recvbuf);
+}
+
+/* ASSUMPTION: the rb_allreqs list is stable for the duration,
+ * and thus can be walked without holding rb_lock. Eg. the
+ * caller is holding the transport send lock to exclude
+ * device removal or disconnection.
+ */
+static void rpcrdma_reqs_reset(struct rpcrdma_xprt *r_xprt)
+{
+ struct rpcrdma_buffer *buf = &r_xprt->rx_buf;
+ struct rpcrdma_req *req;
+
+ list_for_each_entry(req, &buf->rb_allreqs, rl_all)
+ rpcrdma_req_reset(req);
+}
+
+/* No locking needed here. This function is called only by the
+ * Receive completion handler.
+ */
+static noinline
+struct rpcrdma_rep *rpcrdma_rep_create(struct rpcrdma_xprt *r_xprt,
+ bool temp)
{
struct rpcrdma_rep *rep;
@@ -1083,6 +1125,9 @@ static struct rpcrdma_rep *rpcrdma_rep_create(struct rpcrdma_xprt *r_xprt,
if (!rep->rr_rdmabuf)
goto out_free;
+ if (!rpcrdma_regbuf_dma_map(r_xprt, rep->rr_rdmabuf))
+ goto out_free_regbuf;
+
xdr_buf_init(&rep->rr_hdrbuf, rdmab_data(rep->rr_rdmabuf),
rdmab_length(rep->rr_rdmabuf));
rep->rr_cqe.done = rpcrdma_wc_receive;
@@ -1095,12 +1140,17 @@ static struct rpcrdma_rep *rpcrdma_rep_create(struct rpcrdma_xprt *r_xprt,
list_add(&rep->rr_all, &r_xprt->rx_buf.rb_all_reps);
return rep;
+out_free_regbuf:
+ rpcrdma_regbuf_free(rep->rr_rdmabuf);
out_free:
kfree(rep);
out:
return NULL;
}
+/* No locking needed here. This function is invoked only by the
+ * Receive completion handler, or during transport shutdown.
+ */
static void rpcrdma_rep_destroy(struct rpcrdma_rep *rep)
{
list_del(&rep->rr_all);
@@ -1130,8 +1180,10 @@ static void rpcrdma_reps_unmap(struct rpcrdma_xprt *r_xprt)
struct rpcrdma_buffer *buf = &r_xprt->rx_buf;
struct rpcrdma_rep *rep;
- list_for_each_entry(rep, &buf->rb_all_reps, rr_all)
+ list_for_each_entry(rep, &buf->rb_all_reps, rr_all) {
rpcrdma_regbuf_dma_unmap(rep->rr_rdmabuf);
+ rep->rr_temp = true;
+ }
}
static void rpcrdma_reps_destroy(struct rpcrdma_buffer *buf)
@@ -1153,7 +1205,6 @@ int rpcrdma_buffer_create(struct rpcrdma_xprt *r_xprt)
struct rpcrdma_buffer *buf = &r_xprt->rx_buf;
int i, rc;
- buf->rb_max_requests = r_xprt->rx_ep.rep_max_requests;
buf->rb_bc_srv_max_requests = 0;
spin_lock_init(&buf->rb_lock);
INIT_LIST_HEAD(&buf->rb_mrs);
@@ -1165,7 +1216,7 @@ int rpcrdma_buffer_create(struct rpcrdma_xprt *r_xprt)
INIT_LIST_HEAD(&buf->rb_all_reps);
rc = -ENOMEM;
- for (i = 0; i < buf->rb_max_requests; i++) {
+ for (i = 0; i < r_xprt->rx_xprt.max_reqs; i++) {
struct rpcrdma_req *req;
req = rpcrdma_req_create(r_xprt, RPCRDMA_V1_DEF_INLINE_SIZE * 2,
@@ -1177,10 +1228,6 @@ int rpcrdma_buffer_create(struct rpcrdma_xprt *r_xprt)
init_llist_head(&buf->rb_free_reps);
- rc = rpcrdma_sendctxs_create(r_xprt);
- if (rc)
- goto out;
-
return 0;
out:
rpcrdma_buffer_destroy(buf);
@@ -1256,7 +1303,6 @@ static void rpcrdma_mrs_destroy(struct rpcrdma_xprt *r_xprt)
void
rpcrdma_buffer_destroy(struct rpcrdma_buffer *buf)
{
- rpcrdma_sendctxs_destroy(buf);
rpcrdma_reps_destroy(buf);
while (!list_empty(&buf->rb_send_bufs)) {
@@ -1497,7 +1543,7 @@ void rpcrdma_post_recvs(struct rpcrdma_xprt *r_xprt, bool temp)
{
struct rpcrdma_buffer *buf = &r_xprt->rx_buf;
struct rpcrdma_ep *ep = &r_xprt->rx_ep;
- struct ib_recv_wr *i, *wr, *bad_wr;
+ struct ib_recv_wr *wr, *bad_wr;
struct rpcrdma_rep *rep;
int needed, count, rc;
@@ -1524,23 +1570,15 @@ void rpcrdma_post_recvs(struct rpcrdma_xprt *r_xprt, bool temp)
if (!rep)
break;
+ trace_xprtrdma_post_recv(rep);
rep->rr_recv_wr.next = wr;
wr = &rep->rr_recv_wr;
--needed;
+ ++count;
}
if (!wr)
goto out;
- for (i = wr; i; i = i->next) {
- rep = container_of(i, struct rpcrdma_rep, rr_recv_wr);
-
- if (!rpcrdma_regbuf_dma_map(r_xprt, rep->rr_rdmabuf))
- goto release_wrs;
-
- trace_xprtrdma_post_recv(rep);
- ++count;
- }
-
rc = ib_post_recv(r_xprt->rx_ia.ri_id->qp, wr,
(const struct ib_recv_wr **)&bad_wr);
out:
@@ -1557,11 +1595,4 @@ out:
}
ep->rep_receive_count += count;
return;
-
-release_wrs:
- for (i = wr; i;) {
- rep = container_of(i, struct rpcrdma_rep, rr_recv_wr);
- i = i->next;
- rpcrdma_recv_buffer_put(rep);
- }
}
diff --git a/net/sunrpc/xprtrdma/xprt_rdma.h b/net/sunrpc/xprtrdma/xprt_rdma.h
index d796d68609ed..37d5080c250b 100644
--- a/net/sunrpc/xprtrdma/xprt_rdma.h
+++ b/net/sunrpc/xprtrdma/xprt_rdma.h
@@ -71,9 +71,8 @@ struct rpcrdma_ia {
struct rdma_cm_id *ri_id;
struct ib_pd *ri_pd;
int ri_async_rc;
- unsigned int ri_max_segs;
+ unsigned int ri_max_rdma_segs;
unsigned int ri_max_frwr_depth;
- unsigned int ri_max_send_sges;
bool ri_implicit_roundup;
enum ib_mr_type ri_mrtype;
unsigned long ri_flags;
@@ -99,7 +98,7 @@ struct rpcrdma_ep {
wait_queue_head_t rep_connect_wait;
struct rpcrdma_connect_private rep_cm_private;
struct rdma_conn_param rep_remote_cma;
- unsigned int rep_max_requests; /* set by /proc */
+ unsigned int rep_max_requests; /* depends on device */
unsigned int rep_inline_send; /* negotiated */
unsigned int rep_inline_recv; /* negotiated */
int rep_receive_count;
@@ -373,7 +372,7 @@ struct rpcrdma_buffer {
struct llist_head rb_free_reps;
- u32 rb_max_requests;
+ __be32 rb_max_requests;
u32 rb_credits; /* most recent credit grant */
u32 rb_bc_srv_max_requests;
@@ -479,6 +478,7 @@ void rpcrdma_post_recvs(struct rpcrdma_xprt *r_xprt, bool temp);
*/
struct rpcrdma_req *rpcrdma_req_create(struct rpcrdma_xprt *r_xprt, size_t size,
gfp_t flags);
+int rpcrdma_req_setup(struct rpcrdma_xprt *r_xprt, struct rpcrdma_req *req);
void rpcrdma_req_destroy(struct rpcrdma_req *req);
int rpcrdma_buffer_create(struct rpcrdma_xprt *);
void rpcrdma_buffer_destroy(struct rpcrdma_buffer *);
@@ -535,12 +535,11 @@ rpcrdma_data_dir(bool writing)
/* Memory registration calls xprtrdma/frwr_ops.c
*/
-bool frwr_is_supported(struct ib_device *device);
void frwr_reset(struct rpcrdma_req *req);
-int frwr_open(struct rpcrdma_ia *ia, struct rpcrdma_ep *ep);
+int frwr_query_device(struct rpcrdma_xprt *r_xprt,
+ const struct ib_device *device);
int frwr_init_mr(struct rpcrdma_ia *ia, struct rpcrdma_mr *mr);
void frwr_release_mr(struct rpcrdma_mr *mr);
-size_t frwr_maxpages(struct rpcrdma_xprt *r_xprt);
struct rpcrdma_mr_seg *frwr_map(struct rpcrdma_xprt *r_xprt,
struct rpcrdma_mr_seg *seg,
int nsegs, bool writing, __be32 xid,
@@ -583,7 +582,6 @@ static inline void rpcrdma_set_xdrlen(struct xdr_buf *xdr, size_t len)
/* RPC/RDMA module init - xprtrdma/transport.c
*/
-extern unsigned int xprt_rdma_slot_table_entries;
extern unsigned int xprt_rdma_max_inline_read;
extern unsigned int xprt_rdma_max_inline_write;
void xprt_rdma_format_addresses(struct rpc_xprt *xprt, struct sockaddr *sap);
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.