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Date: Tue, 1 Feb 2022 18:39:26 +0100
From: Andrea Claudi <aclaudi@...hat.com>
To: netdev@...r.kernel.org
Cc: stephen@...workplumber.org, dsahern@...il.com,
markzhang@...dia.com, leonro@...dia.com
Subject: [PATCH iproute2 3/3] rdma: RES_PID and RES_KERN_NAME are alternatives to each other
RDMA_NLDEV_ATTR_RES_PID and RDMA_NLDEV_ATTR_RES_KERN_NAME cannot be set
together, as evident from the fill_res_name_pid() function in the kernel
infiniband driver. This commit makes this clear at first glance, using
an else branch for RDMA_NLDEV_ATTR_RES_KERN_NAME.
This also helps coverity to better understand this code and avoid
producing a bogus warning complaining about mnl_attr_get_str overwriting
comm, and thus leaking the storage that comm points to.
Signed-off-by: Andrea Claudi <aclaudi@...hat.com>
---
rdma/res-cmid.c | 10 ++++------
rdma/res-cq.c | 9 ++++-----
rdma/res-ctx.c | 9 ++++-----
rdma/res-mr.c | 8 ++++----
rdma/res-pd.c | 9 ++++-----
rdma/res-qp.c | 9 ++++-----
rdma/res-srq.c | 10 +++++-----
rdma/stat.c | 11 +++++------
8 files changed, 34 insertions(+), 41 deletions(-)
diff --git a/rdma/res-cmid.c b/rdma/res-cmid.c
index bfaa47b5..21bdabca 100644
--- a/rdma/res-cmid.c
+++ b/rdma/res-cmid.c
@@ -161,6 +161,10 @@ static int res_cm_id_line(struct rd *rd, const char *name, int idx,
if (nla_line[RDMA_NLDEV_ATTR_RES_PID]) {
pid = mnl_attr_get_u32(nla_line[RDMA_NLDEV_ATTR_RES_PID]);
comm = get_task_name(pid);
+ } else if (nla_line[RDMA_NLDEV_ATTR_RES_KERN_NAME]) {
+ /* discard const from mnl_attr_get_str */
+ comm = (char *)mnl_attr_get_str(
+ nla_line[RDMA_NLDEV_ATTR_RES_KERN_NAME]);
}
if (rd_is_filtered_attr(rd, "pid", pid,
@@ -173,12 +177,6 @@ static int res_cm_id_line(struct rd *rd, const char *name, int idx,
nla_line[RDMA_NLDEV_ATTR_RES_CM_IDN]))
goto out;
- if (nla_line[RDMA_NLDEV_ATTR_RES_KERN_NAME]) {
- /* discard const from mnl_attr_get_str */
- comm = (char *)mnl_attr_get_str(
- nla_line[RDMA_NLDEV_ATTR_RES_KERN_NAME]);
- }
-
open_json_object(NULL);
print_link(rd, idx, name, port, nla_line);
res_print_uint(rd, "cm-idn", cm_idn,
diff --git a/rdma/res-cq.c b/rdma/res-cq.c
index 9e7c4f51..0ba19447 100644
--- a/rdma/res-cq.c
+++ b/rdma/res-cq.c
@@ -86,6 +86,10 @@ static int res_cq_line(struct rd *rd, const char *name, int idx,
if (nla_line[RDMA_NLDEV_ATTR_RES_PID]) {
pid = mnl_attr_get_u32(nla_line[RDMA_NLDEV_ATTR_RES_PID]);
comm = get_task_name(pid);
+ } else if (nla_line[RDMA_NLDEV_ATTR_RES_KERN_NAME]) {
+ /* discard const from mnl_attr_get_str */
+ comm = (char *)mnl_attr_get_str(
+ nla_line[RDMA_NLDEV_ATTR_RES_KERN_NAME]);
}
if (rd_is_filtered_attr(rd, "pid", pid,
@@ -103,11 +107,6 @@ static int res_cq_line(struct rd *rd, const char *name, int idx,
nla_line[RDMA_NLDEV_ATTR_RES_CTXN]))
goto out;
- if (nla_line[RDMA_NLDEV_ATTR_RES_KERN_NAME])
- /* discard const from mnl_attr_get_str */
- comm = (char *)mnl_attr_get_str(
- nla_line[RDMA_NLDEV_ATTR_RES_KERN_NAME]);
-
open_json_object(NULL);
print_dev(rd, idx, name);
res_print_uint(rd, "cqn", cqn, nla_line[RDMA_NLDEV_ATTR_RES_CQN]);
diff --git a/rdma/res-ctx.c b/rdma/res-ctx.c
index 30afe97a..895598d8 100644
--- a/rdma/res-ctx.c
+++ b/rdma/res-ctx.c
@@ -20,6 +20,10 @@ static int res_ctx_line(struct rd *rd, const char *name, int idx,
if (nla_line[RDMA_NLDEV_ATTR_RES_PID]) {
pid = mnl_attr_get_u32(nla_line[RDMA_NLDEV_ATTR_RES_PID]);
comm = get_task_name(pid);
+ } else if (nla_line[RDMA_NLDEV_ATTR_RES_KERN_NAME]) {
+ /* discard const from mnl_attr_get_str */
+ comm = (char *)mnl_attr_get_str(
+ nla_line[RDMA_NLDEV_ATTR_RES_KERN_NAME]);
}
if (rd_is_filtered_attr(rd, "pid", pid,
@@ -33,11 +37,6 @@ static int res_ctx_line(struct rd *rd, const char *name, int idx,
nla_line[RDMA_NLDEV_ATTR_RES_CTXN]))
goto out;
- if (nla_line[RDMA_NLDEV_ATTR_RES_KERN_NAME])
- /* discard const from mnl_attr_get_str */
- comm = (char *)mnl_attr_get_str(
- nla_line[RDMA_NLDEV_ATTR_RES_KERN_NAME]);
-
open_json_object(NULL);
print_dev(rd, idx, name);
res_print_uint(rd, "ctxn", ctxn, nla_line[RDMA_NLDEV_ATTR_RES_CTXN]);
diff --git a/rdma/res-mr.c b/rdma/res-mr.c
index 1bf73f3a..9ae6c777 100644
--- a/rdma/res-mr.c
+++ b/rdma/res-mr.c
@@ -49,6 +49,10 @@ static int res_mr_line(struct rd *rd, const char *name, int idx,
if (nla_line[RDMA_NLDEV_ATTR_RES_PID]) {
pid = mnl_attr_get_u32(nla_line[RDMA_NLDEV_ATTR_RES_PID]);
comm = get_task_name(pid);
+ } else if (nla_line[RDMA_NLDEV_ATTR_RES_KERN_NAME]) {
+ /* discard const from mnl_attr_get_str */
+ comm = (char *)mnl_attr_get_str(
+ nla_line[RDMA_NLDEV_ATTR_RES_KERN_NAME]);
}
if (rd_is_filtered_attr(rd, "pid", pid,
@@ -67,10 +71,6 @@ static int res_mr_line(struct rd *rd, const char *name, int idx,
nla_line[RDMA_NLDEV_ATTR_RES_PDN]))
goto out;
- if (nla_line[RDMA_NLDEV_ATTR_RES_KERN_NAME])
- /* discard const from mnl_attr_get_str */
- comm = (char *)mnl_attr_get_str(
- nla_line[RDMA_NLDEV_ATTR_RES_KERN_NAME]);
open_json_object(NULL);
print_dev(rd, idx, name);
res_print_uint(rd, "mrn", mrn, nla_line[RDMA_NLDEV_ATTR_RES_MRN]);
diff --git a/rdma/res-pd.c b/rdma/res-pd.c
index df538010..aca2b0cc 100644
--- a/rdma/res-pd.c
+++ b/rdma/res-pd.c
@@ -36,6 +36,10 @@ static int res_pd_line(struct rd *rd, const char *name, int idx,
if (nla_line[RDMA_NLDEV_ATTR_RES_PID]) {
pid = mnl_attr_get_u32(nla_line[RDMA_NLDEV_ATTR_RES_PID]);
comm = get_task_name(pid);
+ } else if (nla_line[RDMA_NLDEV_ATTR_RES_KERN_NAME]) {
+ /* discard const from mnl_attr_get_str */
+ comm = (char *)mnl_attr_get_str(
+ nla_line[RDMA_NLDEV_ATTR_RES_KERN_NAME]);
}
if (rd_is_filtered_attr(rd, "pid", pid,
@@ -55,11 +59,6 @@ static int res_pd_line(struct rd *rd, const char *name, int idx,
nla_line[RDMA_NLDEV_ATTR_RES_PDN]))
goto out;
- if (nla_line[RDMA_NLDEV_ATTR_RES_KERN_NAME])
- /* discard const from mnl_attr_get_str */
- comm = (char *)mnl_attr_get_str(
- nla_line[RDMA_NLDEV_ATTR_RES_KERN_NAME]);
-
open_json_object(NULL);
print_dev(rd, idx, name);
res_print_uint(rd, "pdn", pdn, nla_line[RDMA_NLDEV_ATTR_RES_PDN]);
diff --git a/rdma/res-qp.c b/rdma/res-qp.c
index a38be399..76a5334f 100644
--- a/rdma/res-qp.c
+++ b/rdma/res-qp.c
@@ -148,17 +148,16 @@ static int res_qp_line(struct rd *rd, const char *name, int idx,
if (nla_line[RDMA_NLDEV_ATTR_RES_PID]) {
pid = mnl_attr_get_u32(nla_line[RDMA_NLDEV_ATTR_RES_PID]);
comm = get_task_name(pid);
+ } else if (nla_line[RDMA_NLDEV_ATTR_RES_KERN_NAME]) {
+ /* discard const from mnl_attr_get_str */
+ comm = (char *)mnl_attr_get_str(
+ nla_line[RDMA_NLDEV_ATTR_RES_KERN_NAME]);
}
if (rd_is_filtered_attr(rd, "pid", pid,
nla_line[RDMA_NLDEV_ATTR_RES_PID]))
goto out;
- if (nla_line[RDMA_NLDEV_ATTR_RES_KERN_NAME])
- /* discard const from mnl_attr_get_str */
- comm = (char *)mnl_attr_get_str(
- nla_line[RDMA_NLDEV_ATTR_RES_KERN_NAME]);
-
open_json_object(NULL);
print_link(rd, idx, name, port, nla_line);
res_print_uint(rd, "lqpn", lqpn, nla_line[RDMA_NLDEV_ATTR_RES_LQPN]);
diff --git a/rdma/res-srq.c b/rdma/res-srq.c
index 3038c352..982e3fe9 100644
--- a/rdma/res-srq.c
+++ b/rdma/res-srq.c
@@ -176,7 +176,12 @@ static int res_srq_line(struct rd *rd, const char *name, int idx,
if (nla_line[RDMA_NLDEV_ATTR_RES_PID]) {
pid = mnl_attr_get_u32(nla_line[RDMA_NLDEV_ATTR_RES_PID]);
comm = get_task_name(pid);
+ } else if (nla_line[RDMA_NLDEV_ATTR_RES_KERN_NAME]) {
+ /* discard const from mnl_attr_get_str */
+ comm = (char *)mnl_attr_get_str(
+ nla_line[RDMA_NLDEV_ATTR_RES_KERN_NAME]);
}
+
if (rd_is_filtered_attr(rd, "pid", pid,
nla_line[RDMA_NLDEV_ATTR_RES_PID]))
goto out;
@@ -209,11 +214,6 @@ static int res_srq_line(struct rd *rd, const char *name, int idx,
MNL_CB_OK)
goto out;
- if (nla_line[RDMA_NLDEV_ATTR_RES_KERN_NAME])
- /* discard const from mnl_attr_get_str */
- comm = (char *)mnl_attr_get_str(
- nla_line[RDMA_NLDEV_ATTR_RES_KERN_NAME]);
-
open_json_object(NULL);
print_dev(rd, idx, name);
res_print_uint(rd, "srqn", srqn, nla_line[RDMA_NLDEV_ATTR_RES_SRQN]);
diff --git a/rdma/stat.c b/rdma/stat.c
index 66121b12..cf2c705b 100644
--- a/rdma/stat.c
+++ b/rdma/stat.c
@@ -256,19 +256,18 @@ static int res_counter_line(struct rd *rd, const char *name, int index,
if (nla_line[RDMA_NLDEV_ATTR_RES_PID]) {
pid = mnl_attr_get_u32(nla_line[RDMA_NLDEV_ATTR_RES_PID]);
comm = get_task_name(pid);
+ } else if (nla_line[RDMA_NLDEV_ATTR_RES_KERN_NAME]) {
+ /* discard const from mnl_attr_get_str */
+ comm = (char *)mnl_attr_get_str(
+ nla_line[RDMA_NLDEV_ATTR_RES_KERN_NAME]);
}
+
if (rd_is_filtered_attr(rd, "pid", pid,
nla_line[RDMA_NLDEV_ATTR_RES_PID])) {
ret = MNL_CB_OK;
goto out;
}
- if (nla_line[RDMA_NLDEV_ATTR_RES_KERN_NAME]) {
- /* discard const from mnl_attr_get_str */
- comm = (char *)mnl_attr_get_str(
- nla_line[RDMA_NLDEV_ATTR_RES_KERN_NAME]);
- }
-
mnl_attr_for_each_nested(nla_entry, qp_table) {
struct nlattr *qp_line[RDMA_NLDEV_ATTR_MAX] = {};
--
2.34.1
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