From: Jakub Kicinski <kuba@kernel•org>
To: davem@davemloft•net
Cc: netdev@vger•kernel.org, edumazet@google•com, pabeni@redhat•com,
jiri@resnulli•us, sdf@google•com, nicolas.dichtel@6wind•com,
donald.hunter@gmail•com, Jakub Kicinski <kuba@kernel•org>
Subject: [PATCH net-next 08/15] tools: ynl: wrap recv() + mnl_cb_run2() into a single helper
Date: Thu, 22 Feb 2024 15:56:07 -0800 [thread overview]
Message-ID: <20240222235614.180876-9-kuba@kernel.org> (raw)
In-Reply-To: <20240222235614.180876-1-kuba@kernel.org>
All callers to mnl_cb_run2() call mnl_socket_recvfrom() right before.
Wrap the two in a helper, take typed arguments (struct ynl_parse_arg),
instead of hoping that all callers remember that parser error handling
requires yarg.
Signed-off-by: Jakub Kicinski <kuba@kernel•org>
---
tools/net/ynl/lib/ynl.c | 56 +++++++++++++----------------------------
1 file changed, 18 insertions(+), 38 deletions(-)
diff --git a/tools/net/ynl/lib/ynl.c b/tools/net/ynl/lib/ynl.c
index c9790257189c..96a209773ace 100644
--- a/tools/net/ynl/lib/ynl.c
+++ b/tools/net/ynl/lib/ynl.c
@@ -491,6 +491,19 @@ int ynl_cb_null(const struct nlmsghdr *nlh, void *data)
return MNL_CB_ERROR;
}
+static int ynl_sock_read_msgs(struct ynl_parse_arg *yarg, mnl_cb_t cb)
+{
+ struct ynl_sock *ys = yarg->ys;
+ ssize_t len;
+
+ len = mnl_socket_recvfrom(ys->sock, ys->rx_buf, MNL_SOCKET_BUFFER_SIZE);
+ if (len < 0)
+ return len;
+
+ return mnl_cb_run2(ys->rx_buf, len, ys->seq, ys->portid,
+ cb, yarg, ynl_cb_array, NLMSG_MIN_TYPE);
+}
+
/* Init/fini and genetlink boiler plate */
static int
ynl_get_family_info_mcast(struct ynl_sock *ys, const struct nlattr *mcasts)
@@ -572,14 +585,7 @@ static int ynl_sock_read_family(struct ynl_sock *ys, const char *family_name)
return err;
}
- err = mnl_socket_recvfrom(ys->sock, ys->rx_buf, MNL_SOCKET_BUFFER_SIZE);
- if (err <= 0) {
- perr(ys, "failed to receive the socket family info");
- return err;
- }
- err = mnl_cb_run2(ys->rx_buf, err, ys->seq, ys->portid,
- ynl_get_family_info_cb, &yarg,
- ynl_cb_array, ARRAY_SIZE(ynl_cb_array));
+ err = ynl_sock_read_msgs(&yarg, ynl_get_family_info_cb);
if (err < 0) {
free(ys->mcast_groups);
perr(ys, "failed to receive the socket family info - no such family?");
@@ -755,7 +761,6 @@ static int ynl_ntf_trampoline(const struct nlmsghdr *nlh, void *data)
int ynl_ntf_check(struct ynl_sock *ys)
{
struct ynl_parse_arg yarg = { .ys = ys, };
- ssize_t len;
int err;
do {
@@ -770,14 +775,7 @@ int ynl_ntf_check(struct ynl_sock *ys)
if (err < 1)
return err;
- len = mnl_socket_recvfrom(ys->sock, ys->rx_buf,
- MNL_SOCKET_BUFFER_SIZE);
- if (len < 0)
- return len;
-
- err = mnl_cb_run2(ys->rx_buf, len, ys->seq, ys->portid,
- ynl_ntf_trampoline, &yarg,
- ynl_cb_array, NLMSG_MIN_TYPE);
+ err = ynl_sock_read_msgs(&yarg, ynl_ntf_trampoline);
if (err < 0)
return err;
} while (err > 0);
@@ -834,7 +832,6 @@ static int ynl_req_trampoline(const struct nlmsghdr *nlh, void *data)
int ynl_exec(struct ynl_sock *ys, struct nlmsghdr *req_nlh,
struct ynl_req_state *yrs)
{
- ssize_t len;
int err;
err = mnl_socket_sendto(ys->sock, req_nlh, req_nlh->nlmsg_len);
@@ -842,19 +839,10 @@ int ynl_exec(struct ynl_sock *ys, struct nlmsghdr *req_nlh,
return err;
do {
- len = mnl_socket_recvfrom(ys->sock, ys->rx_buf,
- MNL_SOCKET_BUFFER_SIZE);
- if (len < 0)
- return len;
-
- err = mnl_cb_run2(ys->rx_buf, len, ys->seq, ys->portid,
- ynl_req_trampoline, yrs,
- ynl_cb_array, NLMSG_MIN_TYPE);
- if (err < 0)
- return err;
+ err = ynl_sock_read_msgs(&yrs->yarg, ynl_req_trampoline);
} while (err > 0);
- return 0;
+ return err;
}
static int ynl_dump_trampoline(const struct nlmsghdr *nlh, void *data)
@@ -896,7 +884,6 @@ static void *ynl_dump_end(struct ynl_dump_state *ds)
int ynl_exec_dump(struct ynl_sock *ys, struct nlmsghdr *req_nlh,
struct ynl_dump_state *yds)
{
- ssize_t len;
int err;
err = mnl_socket_sendto(ys->sock, req_nlh, req_nlh->nlmsg_len);
@@ -904,14 +891,7 @@ int ynl_exec_dump(struct ynl_sock *ys, struct nlmsghdr *req_nlh,
return err;
do {
- len = mnl_socket_recvfrom(ys->sock, ys->rx_buf,
- MNL_SOCKET_BUFFER_SIZE);
- if (len < 0)
- goto err_close_list;
-
- err = mnl_cb_run2(ys->rx_buf, len, ys->seq, ys->portid,
- ynl_dump_trampoline, yds,
- ynl_cb_array, NLMSG_MIN_TYPE);
+ err = ynl_sock_read_msgs(&yds->yarg, ynl_dump_trampoline);
if (err < 0)
goto err_close_list;
} while (err > 0);
--
2.43.2
next prev parent reply other threads:[~2024-02-22 23:56 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-02-22 23:55 [PATCH net-next 00/15] tools: ynl: stop using libmnl Jakub Kicinski
2024-02-22 23:56 ` [PATCH net-next 01/15] tools: ynl: give up on libmnl for auto-ints Jakub Kicinski
2024-02-23 13:51 ` Nicolas Dichtel
2024-02-23 14:35 ` Jakub Kicinski
2024-02-23 15:07 ` Nicolas Dichtel
2024-02-23 15:34 ` Donald Hunter
2024-02-22 23:56 ` [PATCH net-next 02/15] tools: ynl: create local attribute helpers Jakub Kicinski
2024-02-23 14:03 ` Nicolas Dichtel
2024-02-23 14:46 ` Jakub Kicinski
2024-02-23 15:09 ` Nicolas Dichtel
2024-02-22 23:56 ` [PATCH net-next 03/15] tools: ynl: create local for_each helpers Jakub Kicinski
2024-02-23 15:16 ` Nicolas Dichtel
2024-02-22 23:56 ` [PATCH net-next 04/15] tools: ynl: create local nlmsg access helpers Jakub Kicinski
2024-02-23 15:20 ` Nicolas Dichtel
2024-02-22 23:56 ` [PATCH net-next 05/15] tools: ynl: create local ARRAY_SIZE() helper Jakub Kicinski
2024-02-23 15:21 ` Nicolas Dichtel
2024-02-22 23:56 ` [PATCH net-next 06/15] tools: ynl: make yarg the first member of struct ynl_dump_state Jakub Kicinski
2024-02-23 15:23 ` Nicolas Dichtel
2024-02-22 23:56 ` [PATCH net-next 07/15] tools: ynl-gen: remove unused parse code Jakub Kicinski
2024-02-23 15:24 ` Nicolas Dichtel
2024-02-22 23:56 ` Jakub Kicinski [this message]
2024-02-23 15:33 ` [PATCH net-next 08/15] tools: ynl: wrap recv() + mnl_cb_run2() into a single helper Nicolas Dichtel
2024-02-22 23:56 ` [PATCH net-next 09/15] tools: ynl: use ynl_sock_read_msgs() for ACK handling Jakub Kicinski
2024-02-23 15:35 ` Nicolas Dichtel
2024-02-22 23:56 ` [PATCH net-next 10/15] tools: ynl: stop using mnl_cb_run2() Jakub Kicinski
2024-02-23 15:50 ` Nicolas Dichtel
2024-02-22 23:56 ` [PATCH net-next 11/15] tools: ynl: switch away from mnl_cb_t Jakub Kicinski
2024-02-23 16:04 ` Nicolas Dichtel
2024-02-22 23:56 ` [PATCH net-next 12/15] tools: ynl: switch away from MNL_CB_* Jakub Kicinski
2024-02-23 16:05 ` Nicolas Dichtel
2024-02-22 23:56 ` [PATCH net-next 13/15] tools: ynl: stop using mnl socket helpers Jakub Kicinski
2024-02-23 16:14 ` Nicolas Dichtel
2024-02-22 23:56 ` [PATCH net-next 14/15] tools: ynl: remove the libmnl dependency Jakub Kicinski
2024-02-23 16:14 ` Nicolas Dichtel
2024-02-22 23:56 ` [PATCH net-next 15/15] tools: ynl: use MSG_DONTWAIT for getting notifications Jakub Kicinski
2024-02-23 16:17 ` Nicolas Dichtel
2024-02-23 16:26 ` [PATCH net-next 00/15] tools: ynl: stop using libmnl Donald Hunter
2024-02-23 16:34 ` Jakub Kicinski
2024-02-26 9:04 ` Donald Hunter
2024-02-26 18:00 ` Jakub Kicinski
2024-02-27 10:49 ` Donald Hunter
2024-02-27 15:56 ` Jakub Kicinski
2024-02-27 16:29 ` Donald Hunter
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