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RDMA/nldev: Return context information 

Extend the RDMA nldev return a context information, like ctx number and
process ID that created that context. This functionality is helpful to
find orphan contexts that are not closed for some reason.

Sample output:

$ rdma res show ctx
dev ibp8s0f0 ctxn 0 pid 980 comm ibv_rc_pingpong
dev ibp8s0f0 ctxn 1 pid 981 comm ibv_rc_pingpong
dev ibp8s0f0 ctxn 2 pid 992 comm ibv_rc_pingpong
dev ibp8s0f1 ctxn 0 pid 984 comm ibv_rc_pingpong
dev ibp8s0f1 ctxn 1 pid 987 comm ibv_rc_pingpong

$ rdma res show ctx dev ibp8s0f1
dev ibp8s0f1 ctxn 0 pid 984 comm ibv_rc_pingpong
dev ibp8s0f1 ctxn 1 pid 987 comm ibv_rc_pingpong

Link: https://lore.kernel.org/r/5c956acfeac4e9d532988575f3da7d64cb449374.1618753110.git.leonro@nvidia.com
Signed-off-by: Neta Ostrovsky <netao@nvidia.com>
Reviewed-by: Mark Zhang <markzhang@nvidia.com>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
This commit is contained in:
Neta Ostrovsky 2021-04-18 16:41:23 +03:00 committed by Jason Gunthorpe
parent cb5cd0ea4e
commit 12ce208f40
2 changed files with 32 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

27
drivers/infiniband/core/nldev.c
View File

@ -92,7 +92,9 @@ static const struct nla_policy nldev_policy[RDMA_NLDEV_ATTR_MAX] = {
[RDMA_NLDEV_ATTR_RES_CQE] = { .type = NLA_U32 },
[RDMA_NLDEV_ATTR_RES_CQN] = { .type = NLA_U32 },
[RDMA_NLDEV_ATTR_RES_CQ_ENTRY] = { .type = NLA_NESTED },
[RDMA_NLDEV_ATTR_RES_CTX] = { .type = NLA_NESTED },
[RDMA_NLDEV_ATTR_RES_CTXN] = { .type = NLA_U32 },
[RDMA_NLDEV_ATTR_RES_CTX_ENTRY] = { .type = NLA_NESTED },
[RDMA_NLDEV_ATTR_RES_DST_ADDR] = {
.len = sizeof(struct __kernel_sockaddr_storage) },
[RDMA_NLDEV_ATTR_RES_IOVA] = { .type = NLA_U64 },
@ -703,6 +705,20 @@ static int fill_res_pd_entry(struct sk_buff *msg, bool has_cap_net_admin,
err: return -EMSGSIZE;
}
static int fill_res_ctx_entry(struct sk_buff *msg, bool has_cap_net_admin,
struct rdma_restrack_entry *res, uint32_t port)
{
struct ib_ucontext *ctx = container_of(res, struct ib_ucontext, res);
if (rdma_is_kernel_res(res))
return 0;
if (nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_CTXN, ctx->res.id))
return -EMSGSIZE;
return fill_res_name_pid(msg, res);
}
static int fill_stat_counter_mode(struct sk_buff *msg,
struct rdma_counter *counter)
{
@ -1236,6 +1252,12 @@ static const struct nldev_fill_res_entry fill_entries[RDMA_RESTRACK_MAX] = {
.entry = RDMA_NLDEV_ATTR_STAT_COUNTER_ENTRY,
.id = RDMA_NLDEV_ATTR_STAT_COUNTER_ID,
},
[RDMA_RESTRACK_CTX] = {
.nldev_attr = RDMA_NLDEV_ATTR_RES_CTX,
.flags = NLDEV_PER_DEV,
.entry = RDMA_NLDEV_ATTR_RES_CTX_ENTRY,
.id = RDMA_NLDEV_ATTR_RES_CTXN,
},
};
static int res_get_common_doit(struct sk_buff *skb, struct nlmsghdr *nlh,
@ -1476,6 +1498,7 @@ RES_GET_FUNCS(pd, RDMA_RESTRACK_PD);
RES_GET_FUNCS(mr, RDMA_RESTRACK_MR);
RES_GET_FUNCS(mr_raw, RDMA_RESTRACK_MR);
RES_GET_FUNCS(counter, RDMA_RESTRACK_COUNTER);
RES_GET_FUNCS(ctx, RDMA_RESTRACK_CTX);
static LIST_HEAD(link_ops);
static DECLARE_RWSEM(link_ops_rwsem);
@ -2139,6 +2162,10 @@ static const struct rdma_nl_cbs nldev_cb_table[RDMA_NLDEV_NUM_OPS] = {
.doit = nldev_res_get_pd_doit,
.dump = nldev_res_get_pd_dumpit,
},
[RDMA_NLDEV_CMD_RES_CTX_GET] = {
.doit = nldev_res_get_ctx_doit,
.dump = nldev_res_get_ctx_dumpit,
},
[RDMA_NLDEV_CMD_SYS_GET] = {
.doit = nldev_sys_get_doit,
},

5
include/uapi/rdma/rdma_netlink.h
View File

@ -293,6 +293,8 @@ enum rdma_nldev_command {
RDMA_NLDEV_CMD_RES_MR_GET_RAW,
RDMA_NLDEV_CMD_RES_CTX_GET, /* can dump */
RDMA_NLDEV_NUM_OPS
};
@ -533,6 +535,9 @@ enum rdma_nldev_attr {
RDMA_NLDEV_ATTR_RES_RAW, /* binary */
RDMA_NLDEV_ATTR_RES_CTX, /* nested table */
RDMA_NLDEV_ATTR_RES_CTX_ENTRY, /* nested table */
/*
* Always the end
*/