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RDMA/nldev: common resource dumpit function

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Create a common dumpit function that can be used by all common resource
types.  This reduces code replication and simplifies the code as we add
more resource types.

Signed-off-by: Steve Wise <swise@opengridcomputing.com>
Reviewed-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Steve Wise 2018-03-01 13:57:29 -08:00 committed by Doug Ledford
parent 88831a2cfe
commit d12ff62482
1 changed files with 43 additions and 18 deletions
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61
drivers/infiniband/core/nldev.c
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@ -212,10 +212,10 @@ err:
return ret;
}
static int fill_res_qp_entry(struct sk_buff *msg,
struct ib_qp *qp, uint32_t port)
static int fill_res_qp_entry(struct sk_buff *msg, struct netlink_callback *cb,
struct rdma_restrack_entry *res, uint32_t port)
{
struct rdma_restrack_entry *res = &qp->res;
struct ib_qp *qp = container_of(res, struct ib_qp, res);
struct ib_qp_init_attr qp_init_attr;
struct nlattr *entry_attr;
struct ib_qp_attr qp_attr;
@ -558,23 +558,40 @@ static int nldev_res_get_dumpit(struct sk_buff *skb,
return ib_enum_all_devs(_nldev_res_get_dumpit, skb, cb);
}
static int nldev_res_get_qp_dumpit(struct sk_buff *skb,
struct netlink_callback *cb)
struct nldev_fill_res_entry {
int (*fill_res_func)(struct sk_buff *msg, struct netlink_callback *cb,
struct rdma_restrack_entry *res, u32 port);
enum rdma_nldev_attr nldev_attr;
enum rdma_nldev_command nldev_cmd;
};
static const struct nldev_fill_res_entry fill_entries[RDMA_RESTRACK_MAX] = {
[RDMA_RESTRACK_QP] = {
.fill_res_func = fill_res_qp_entry,
.nldev_cmd = RDMA_NLDEV_CMD_RES_QP_GET,
.nldev_attr = RDMA_NLDEV_ATTR_RES_QP,
},
};
static int res_get_common_dumpit(struct sk_buff *skb,
struct netlink_callback *cb,
enum rdma_restrack_type res_type)
{
const struct nldev_fill_res_entry *fe = &fill_entries[res_type];
struct nlattr *tb[RDMA_NLDEV_ATTR_MAX];
struct rdma_restrack_entry *res;
int err, ret = 0, idx = 0;
struct nlattr *table_attr;
struct ib_device *device;
int start = cb->args[0];
struct ib_qp *qp = NULL;
struct nlmsghdr *nlh;
u32 index, port = 0;
bool filled = false;
err = nlmsg_parse(cb->nlh, 0, tb, RDMA_NLDEV_ATTR_MAX - 1,
nldev_policy, NULL);
/*
* Right now, we are expecting the device index to get QP information,
* Right now, we are expecting the device index to get res information,
* but it is possible to extend this code to return all devices in
* one shot by checking the existence of RDMA_NLDEV_ATTR_DEV_INDEX.
* if it doesn't exist, we will iterate over all devices.
@ -601,7 +618,7 @@ static int nldev_res_get_qp_dumpit(struct sk_buff *skb,
}
nlh = nlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
RDMA_NL_GET_TYPE(RDMA_NL_NLDEV, RDMA_NLDEV_CMD_RES_QP_GET),
RDMA_NL_GET_TYPE(RDMA_NL_NLDEV, fe->nldev_cmd),
0, NLM_F_MULTI);
if (fill_nldev_handle(skb, device)) {
@ -609,24 +626,26 @@ static int nldev_res_get_qp_dumpit(struct sk_buff *skb,
goto err;
}
table_attr = nla_nest_start(skb, RDMA_NLDEV_ATTR_RES_QP);
table_attr = nla_nest_start(skb, fe->nldev_attr);
if (!table_attr) {
ret = -EMSGSIZE;
goto err;
}
down_read(&device->res.rwsem);
hash_for_each_possible(device->res.hash, res, node, RDMA_RESTRACK_QP) {
hash_for_each_possible(device->res.hash, res, node, res_type) {
if (idx < start)
goto next;
if ((rdma_is_kernel_res(res) &&
task_active_pid_ns(current) != &init_pid_ns) ||
(!rdma_is_kernel_res(res) &&
task_active_pid_ns(current) != task_active_pid_ns(res->task)))
(!rdma_is_kernel_res(res) && task_active_pid_ns(current) !=
task_active_pid_ns(res->task)))
/*
* 1. Kernel QPs should be visible in init namspace only
* 2. Present only QPs visible in the current namespace
* 1. Kern resources should be visible in init
* namspace only
* 2. Present only resources visible in the current
* namespace
*/
goto next;
@ -638,10 +657,10 @@ static int nldev_res_get_qp_dumpit(struct sk_buff *skb,
*/
goto next;
qp = container_of(res, struct ib_qp, res);
filled = true;
up_read(&device->res.rwsem);
ret = fill_res_qp_entry(skb, qp, port);
ret = fe->fill_res_func(skb, cb, res, port);
down_read(&device->res.rwsem);
/*
* Return resource back, but it won't be released till
@ -667,10 +686,10 @@ next: idx++;
cb->args[0] = idx;
/*
* No more QPs to fill, cancel the message and
* No more entries to fill, cancel the message and
* return 0 to mark end of dumpit.
*/
if (!qp)
if (!filled)
goto err;
put_device(&device->dev);
@ -688,6 +707,12 @@ err_index:
return ret;
}
static int nldev_res_get_qp_dumpit(struct sk_buff *skb,
struct netlink_callback *cb)
{
return res_get_common_dumpit(skb, cb, RDMA_RESTRACK_QP);
}
static const struct rdma_nl_cbs nldev_cb_table[RDMA_NLDEV_NUM_OPS] = {
[RDMA_NLDEV_CMD_GET] = {
.doit = nldev_get_doit,