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linux-brain/drivers/infiniband/hw/cxgb4/restrack.c
Michal Kubecek ae0be8de9a netlink: make nla_nest_start() add NLA_F_NESTED flag 
Even if the NLA_F_NESTED flag was introduced more than 11 years ago, most
netlink based interfaces (including recently added ones) are still not
setting it in kernel generated messages. Without the flag, message parsers
not aware of attribute semantics (e.g. wireshark dissector or libmnl's
mnl_nlmsg_fprintf()) cannot recognize nested attributes and won't display
the structure of their contents.

Unfortunately we cannot just add the flag everywhere as there may be
userspace applications which check nlattr::nla_type directly rather than
through a helper masking out the flags. Therefore the patch renames
nla_nest_start() to nla_nest_start_noflag() and introduces nla_nest_start()
as a wrapper adding NLA_F_NESTED. The calls which add NLA_F_NESTED manually
are rewritten to use nla_nest_start().

Except for changes in include/net/netlink.h, the patch was generated using
this semantic patch:

@@ expression E1, E2; @@
-nla_nest_start(E1, E2)
+nla_nest_start_noflag(E1, E2)

@@ expression E1, E2; @@
-nla_nest_start_noflag(E1, E2 | NLA_F_NESTED)
+nla_nest_start(E1, E2)

Signed-off-by: Michal Kubecek <mkubecek@suse.cz>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Acked-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-04-27 17:03:44 -04:00

502 lines
13 KiB
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/*
* Copyright (c) 2018 Chelsio, Inc. All rights reserved.
*
* This software is available to you under a choice of one of two
* licenses. You may choose to be licensed under the terms of the GNU
* General Public License (GPL) Version 2, available from the file
* COPYING in the main directory of this source tree, or the
* OpenIB.org BSD license below:
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* - Redistributions of source code must retain the above
* copyright notice, this list of conditions and the following
* disclaimer.
*
* - Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include <rdma/rdma_cm.h>
#include "iw_cxgb4.h"
#include <rdma/restrack.h>
#include <uapi/rdma/rdma_netlink.h>
static int fill_sq(struct sk_buff *msg, struct t4_wq *wq)
{
/* WQ+SQ */
if (rdma_nl_put_driver_u32(msg, "sqid", wq->sq.qid))
goto err;
if (rdma_nl_put_driver_u32(msg, "flushed", wq->flushed))
goto err;
if (rdma_nl_put_driver_u32(msg, "memsize", wq->sq.memsize))
goto err;
if (rdma_nl_put_driver_u32(msg, "cidx", wq->sq.cidx))
goto err;
if (rdma_nl_put_driver_u32(msg, "pidx", wq->sq.pidx))
goto err;
if (rdma_nl_put_driver_u32(msg, "wq_pidx", wq->sq.wq_pidx))
goto err;
if (rdma_nl_put_driver_u32(msg, "flush_cidx", wq->sq.flush_cidx))
goto err;
if (rdma_nl_put_driver_u32(msg, "in_use", wq->sq.in_use))
goto err;
if (rdma_nl_put_driver_u32(msg, "size", wq->sq.size))
goto err;
if (rdma_nl_put_driver_u32_hex(msg, "flags", wq->sq.flags))
goto err;
return 0;
err:
return -EMSGSIZE;
}
static int fill_rq(struct sk_buff *msg, struct t4_wq *wq)
{
/* RQ */
if (rdma_nl_put_driver_u32(msg, "rqid", wq->rq.qid))
goto err;
if (rdma_nl_put_driver_u32(msg, "memsize", wq->rq.memsize))
goto err;
if (rdma_nl_put_driver_u32(msg, "cidx", wq->rq.cidx))
goto err;
if (rdma_nl_put_driver_u32(msg, "pidx", wq->rq.pidx))
goto err;
if (rdma_nl_put_driver_u32(msg, "wq_pidx", wq->rq.wq_pidx))
goto err;
if (rdma_nl_put_driver_u32(msg, "msn", wq->rq.msn))
goto err;
if (rdma_nl_put_driver_u32_hex(msg, "rqt_hwaddr", wq->rq.rqt_hwaddr))
goto err;
if (rdma_nl_put_driver_u32(msg, "rqt_size", wq->rq.rqt_size))
goto err;
if (rdma_nl_put_driver_u32(msg, "in_use", wq->rq.in_use))
goto err;
if (rdma_nl_put_driver_u32(msg, "size", wq->rq.size))
goto err;
return 0;
err:
return -EMSGSIZE;
}
static int fill_swsqe(struct sk_buff *msg, struct t4_sq *sq, u16 idx,
struct t4_swsqe *sqe)
{
if (rdma_nl_put_driver_u32(msg, "idx", idx))
goto err;
if (rdma_nl_put_driver_u32(msg, "opcode", sqe->opcode))
goto err;
if (rdma_nl_put_driver_u32(msg, "complete", sqe->complete))
goto err;
if (sqe->complete &&
rdma_nl_put_driver_u32(msg, "cqe_status", CQE_STATUS(&sqe->cqe)))
goto err;
if (rdma_nl_put_driver_u32(msg, "signaled", sqe->signaled))
goto err;
if (rdma_nl_put_driver_u32(msg, "flushed", sqe->flushed))
goto err;
return 0;
err:
return -EMSGSIZE;
}
/*
* Dump the first and last pending sqes.
*/
static int fill_swsqes(struct sk_buff *msg, struct t4_sq *sq,
u16 first_idx, struct t4_swsqe *first_sqe,
u16 last_idx, struct t4_swsqe *last_sqe)
{
if (!first_sqe)
goto out;
if (fill_swsqe(msg, sq, first_idx, first_sqe))
goto err;
if (!last_sqe)
goto out;
if (fill_swsqe(msg, sq, last_idx, last_sqe))
goto err;
out:
return 0;
err:
return -EMSGSIZE;
}
static int fill_res_qp_entry(struct sk_buff *msg,
struct rdma_restrack_entry *res)
{
struct ib_qp *ibqp = container_of(res, struct ib_qp, res);
struct t4_swsqe *fsp = NULL, *lsp = NULL;
struct c4iw_qp *qhp = to_c4iw_qp(ibqp);
u16 first_sq_idx = 0, last_sq_idx = 0;
struct t4_swsqe first_sqe, last_sqe;
struct nlattr *table_attr;
struct t4_wq wq;
/* User qp state is not available, so don't dump user qps */
if (qhp->ucontext)
return 0;
table_attr = nla_nest_start_noflag(msg, RDMA_NLDEV_ATTR_DRIVER);
if (!table_attr)
goto err;
/* Get a consistent snapshot */
spin_lock_irq(&qhp->lock);
wq = qhp->wq;
/* If there are any pending sqes, copy the first and last */
if (wq.sq.cidx != wq.sq.pidx) {
first_sq_idx = wq.sq.cidx;
first_sqe = qhp->wq.sq.sw_sq[first_sq_idx];
fsp = &first_sqe;
last_sq_idx = wq.sq.pidx;
if (last_sq_idx-- == 0)
last_sq_idx = wq.sq.size - 1;
if (last_sq_idx != first_sq_idx) {
last_sqe = qhp->wq.sq.sw_sq[last_sq_idx];
lsp = &last_sqe;
}
}
spin_unlock_irq(&qhp->lock);
if (fill_sq(msg, &wq))
goto err_cancel_table;
if (fill_swsqes(msg, &wq.sq, first_sq_idx, fsp, last_sq_idx, lsp))
goto err_cancel_table;
if (fill_rq(msg, &wq))
goto err_cancel_table;
nla_nest_end(msg, table_attr);
return 0;
err_cancel_table:
nla_nest_cancel(msg, table_attr);
err:
return -EMSGSIZE;
}
union union_ep {
struct c4iw_listen_ep lep;
struct c4iw_ep ep;
};
static int fill_res_ep_entry(struct sk_buff *msg,
struct rdma_restrack_entry *res)
{
struct rdma_cm_id *cm_id = rdma_res_to_id(res);
struct nlattr *table_attr;
struct c4iw_ep_common *epcp;
struct c4iw_listen_ep *listen_ep = NULL;
struct c4iw_ep *ep = NULL;
struct iw_cm_id *iw_cm_id;
union union_ep *uep;
iw_cm_id = rdma_iw_cm_id(cm_id);
if (!iw_cm_id)
return 0;
epcp = (struct c4iw_ep_common *)iw_cm_id->provider_data;
if (!epcp)
return 0;
uep = kcalloc(1, sizeof(*uep), GFP_KERNEL);
if (!uep)
return 0;
table_attr = nla_nest_start_noflag(msg, RDMA_NLDEV_ATTR_DRIVER);
if (!table_attr)
goto err_free_uep;
/* Get a consistent snapshot */
mutex_lock(&epcp->mutex);
if (epcp->state == LISTEN) {
uep->lep = *(struct c4iw_listen_ep *)epcp;
mutex_unlock(&epcp->mutex);
listen_ep = &uep->lep;
epcp = &listen_ep->com;
} else {
uep->ep = *(struct c4iw_ep *)epcp;
mutex_unlock(&epcp->mutex);
ep = &uep->ep;
epcp = &ep->com;
}
if (rdma_nl_put_driver_u32(msg, "state", epcp->state))
goto err_cancel_table;
if (rdma_nl_put_driver_u64_hex(msg, "flags", epcp->flags))
goto err_cancel_table;
if (rdma_nl_put_driver_u64_hex(msg, "history", epcp->history))
goto err_cancel_table;
if (epcp->state == LISTEN) {
if (rdma_nl_put_driver_u32(msg, "stid", listen_ep->stid))
goto err_cancel_table;
if (rdma_nl_put_driver_u32(msg, "backlog", listen_ep->backlog))
goto err_cancel_table;
} else {
if (rdma_nl_put_driver_u32(msg, "hwtid", ep->hwtid))
goto err_cancel_table;
if (rdma_nl_put_driver_u32(msg, "ord", ep->ord))
goto err_cancel_table;
if (rdma_nl_put_driver_u32(msg, "ird", ep->ird))
goto err_cancel_table;
if (rdma_nl_put_driver_u32(msg, "emss", ep->emss))
goto err_cancel_table;
if (!ep->parent_ep && rdma_nl_put_driver_u32(msg, "atid",
ep->atid))
goto err_cancel_table;
}
nla_nest_end(msg, table_attr);
kfree(uep);
return 0;
err_cancel_table:
nla_nest_cancel(msg, table_attr);
err_free_uep:
kfree(uep);
return -EMSGSIZE;
}
static int fill_cq(struct sk_buff *msg, struct t4_cq *cq)
{
if (rdma_nl_put_driver_u32(msg, "cqid", cq->cqid))
goto err;
if (rdma_nl_put_driver_u32(msg, "memsize", cq->memsize))
goto err;
if (rdma_nl_put_driver_u32(msg, "size", cq->size))
goto err;
if (rdma_nl_put_driver_u32(msg, "cidx", cq->cidx))
goto err;
if (rdma_nl_put_driver_u32(msg, "cidx_inc", cq->cidx_inc))
goto err;
if (rdma_nl_put_driver_u32(msg, "sw_cidx", cq->sw_cidx))
goto err;
if (rdma_nl_put_driver_u32(msg, "sw_pidx", cq->sw_pidx))
goto err;
if (rdma_nl_put_driver_u32(msg, "sw_in_use", cq->sw_in_use))
goto err;
if (rdma_nl_put_driver_u32(msg, "vector", cq->vector))
goto err;
if (rdma_nl_put_driver_u32(msg, "gen", cq->gen))
goto err;
if (rdma_nl_put_driver_u32(msg, "error", cq->error))
goto err;
if (rdma_nl_put_driver_u64_hex(msg, "bits_type_ts",
be64_to_cpu(cq->bits_type_ts)))
goto err;
if (rdma_nl_put_driver_u64_hex(msg, "flags", cq->flags))
goto err;
return 0;
err:
return -EMSGSIZE;
}
static int fill_cqe(struct sk_buff *msg, struct t4_cqe *cqe, u16 idx,
const char *qstr)
{
if (rdma_nl_put_driver_u32(msg, qstr, idx))
goto err;
if (rdma_nl_put_driver_u32_hex(msg, "header",
be32_to_cpu(cqe->header)))
goto err;
if (rdma_nl_put_driver_u32(msg, "len", be32_to_cpu(cqe->len)))
goto err;
if (rdma_nl_put_driver_u32_hex(msg, "wrid_hi",
be32_to_cpu(cqe->u.gen.wrid_hi)))
goto err;
if (rdma_nl_put_driver_u32_hex(msg, "wrid_low",
be32_to_cpu(cqe->u.gen.wrid_low)))
goto err;
if (rdma_nl_put_driver_u64_hex(msg, "bits_type_ts",
be64_to_cpu(cqe->bits_type_ts)))
goto err;
return 0;
err:
return -EMSGSIZE;
}
static int fill_hwcqes(struct sk_buff *msg, struct t4_cq *cq,
struct t4_cqe *cqes)
{
u16 idx;
idx = (cq->cidx > 0) ? cq->cidx - 1 : cq->size - 1;
if (fill_cqe(msg, cqes, idx, "hwcq_idx"))
goto err;
idx = cq->cidx;
if (fill_cqe(msg, cqes + 1, idx, "hwcq_idx"))
goto err;
return 0;
err:
return -EMSGSIZE;
}
static int fill_swcqes(struct sk_buff *msg, struct t4_cq *cq,
struct t4_cqe *cqes)
{
u16 idx;
if (!cq->sw_in_use)
return 0;
idx = cq->sw_cidx;
if (fill_cqe(msg, cqes, idx, "swcq_idx"))
goto err;
if (cq->sw_in_use == 1)
goto out;
idx = (cq->sw_pidx > 0) ? cq->sw_pidx - 1 : cq->size - 1;
if (fill_cqe(msg, cqes + 1, idx, "swcq_idx"))
goto err;
out:
return 0;
err:
return -EMSGSIZE;
}
static int fill_res_cq_entry(struct sk_buff *msg,
struct rdma_restrack_entry *res)
{
struct ib_cq *ibcq = container_of(res, struct ib_cq, res);
struct c4iw_cq *chp = to_c4iw_cq(ibcq);
struct nlattr *table_attr;
struct t4_cqe hwcqes[2];
struct t4_cqe swcqes[2];
struct t4_cq cq;
u16 idx;
/* User cq state is not available, so don't dump user cqs */
if (ibcq->uobject)
return 0;
table_attr = nla_nest_start_noflag(msg, RDMA_NLDEV_ATTR_DRIVER);
if (!table_attr)
goto err;
/* Get a consistent snapshot */
spin_lock_irq(&chp->lock);
/* t4_cq struct */
cq = chp->cq;
/* get 2 hw cqes: cidx-1, and cidx */
idx = (cq.cidx > 0) ? cq.cidx - 1 : cq.size - 1;
hwcqes[0] = chp->cq.queue[idx];
idx = cq.cidx;
hwcqes[1] = chp->cq.queue[idx];
/* get first and last sw cqes */
if (cq.sw_in_use) {
swcqes[0] = chp->cq.sw_queue[cq.sw_cidx];
if (cq.sw_in_use > 1) {
idx = (cq.sw_pidx > 0) ? cq.sw_pidx - 1 : cq.size - 1;
swcqes[1] = chp->cq.sw_queue[idx];
}
}
spin_unlock_irq(&chp->lock);
if (fill_cq(msg, &cq))
goto err_cancel_table;
if (fill_swcqes(msg, &cq, swcqes))
goto err_cancel_table;
if (fill_hwcqes(msg, &cq, hwcqes))
goto err_cancel_table;
nla_nest_end(msg, table_attr);
return 0;
err_cancel_table:
nla_nest_cancel(msg, table_attr);
err:
return -EMSGSIZE;
}
static int fill_res_mr_entry(struct sk_buff *msg,
struct rdma_restrack_entry *res)
{
struct ib_mr *ibmr = container_of(res, struct ib_mr, res);
struct c4iw_mr *mhp = to_c4iw_mr(ibmr);
struct c4iw_dev *dev = mhp->rhp;
u32 stag = mhp->attr.stag;
struct nlattr *table_attr;
struct fw_ri_tpte tpte;
int ret;
if (!stag)
return 0;
table_attr = nla_nest_start_noflag(msg, RDMA_NLDEV_ATTR_DRIVER);
if (!table_attr)
goto err;
ret = cxgb4_read_tpte(dev->rdev.lldi.ports[0], stag, (__be32 *)&tpte);
if (ret) {
dev_err(&dev->rdev.lldi.pdev->dev,
"%s cxgb4_read_tpte err %d\n", __func__, ret);
return 0;
}
if (rdma_nl_put_driver_u32_hex(msg, "idx", stag >> 8))
goto err_cancel_table;
if (rdma_nl_put_driver_u32(msg, "valid",
FW_RI_TPTE_VALID_G(ntohl(tpte.valid_to_pdid))))
goto err_cancel_table;
if (rdma_nl_put_driver_u32_hex(msg, "key", stag & 0xff))
goto err_cancel_table;
if (rdma_nl_put_driver_u32(msg, "state",
FW_RI_TPTE_STAGSTATE_G(ntohl(tpte.valid_to_pdid))))
goto err_cancel_table;
if (rdma_nl_put_driver_u32(msg, "pdid",
FW_RI_TPTE_PDID_G(ntohl(tpte.valid_to_pdid))))
goto err_cancel_table;
if (rdma_nl_put_driver_u32_hex(msg, "perm",
FW_RI_TPTE_PERM_G(ntohl(tpte.locread_to_qpid))))
goto err_cancel_table;
if (rdma_nl_put_driver_u32(msg, "ps",
FW_RI_TPTE_PS_G(ntohl(tpte.locread_to_qpid))))
goto err_cancel_table;
if (rdma_nl_put_driver_u64(msg, "len",
((u64)ntohl(tpte.len_hi) << 32) | ntohl(tpte.len_lo)))
goto err_cancel_table;
if (rdma_nl_put_driver_u32_hex(msg, "pbl_addr",
FW_RI_TPTE_PBLADDR_G(ntohl(tpte.nosnoop_pbladdr))))
goto err_cancel_table;
nla_nest_end(msg, table_attr);
return 0;
err_cancel_table:
nla_nest_cancel(msg, table_attr);
err:
return -EMSGSIZE;
}
c4iw_restrack_func *c4iw_restrack_funcs[RDMA_RESTRACK_MAX] = {
[RDMA_RESTRACK_QP] = fill_res_qp_entry,
[RDMA_RESTRACK_CM_ID] = fill_res_ep_entry,
[RDMA_RESTRACK_CQ] = fill_res_cq_entry,
[RDMA_RESTRACK_MR] = fill_res_mr_entry,
};
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