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lib/sock: Fix the coredump issue in sock_map_realese

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When tested on Linux 5.8 kernel and configure spdk
with debug mode (--enable-debug), and test SPDK NVMe-oF
tcp transport, and we see the coredump in sock_map_release
with the following statements:
	assert(entry->ref > 0);

After debug, I can confirm that the placement_id value got
from the following function (sock->net_impl->get_placement_id)
changes.
It means that: When the sock is added into the poll group
(spdk_sock_group_add_sock), we get the placement_id (named as
Value(begin)); and when the sock is removed from the poll group
(spdk_sock_group_remove_sock), we get the plaemednt_id on
the same sock (named as Vaule(end)). I found that
Value(begin) ! = Value(end).

So our solution is for a socket, we will get placement_id once,
then we can solve this issue.

Signed-off-by: Ziye Yang <ziye.yang@intel.com>
Change-Id: Ia1d0cf39247b53410260561aca5af38130cc0abb
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/3983
Community-CI: Mellanox Build Bot
Community-CI: Broadcom CI
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Tomasz Zawadzki <tomasz.zawadzki@intel.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
Reviewed-by: Aleksey Marchuk <alexeymar@mellanox.com>
This commit is contained in:
Ziye Yang 2020-09-01 00:47:15 +08:00 committed by Tomasz Zawadzki
parent 49601c040f
commit 03aa8995e9
2 changed files with 24 additions and 7 deletions
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1
include/spdk_internal/sock.h
View File

@ -63,6 +63,7 @@ struct spdk_sock {
TAILQ_HEAD(, spdk_sock_request) queued_reqs;
TAILQ_HEAD(, spdk_sock_request) pending_reqs;
int queued_iovcnt;
int placement_id;
struct {
uint8_t closed : 1;

30
lib/sock/sock.c
View File

@ -146,13 +146,29 @@ sock_remove_sock_group_from_map_table(struct spdk_sock_group *group)
}
static int
sock_get_placement_id(struct spdk_sock *sock)
{
int rc;
int placement_id;
if (!sock->placement_id) {
rc = sock->net_impl->get_placement_id(sock, &placement_id);
if (!rc && (placement_id != 0)) {
sock->placement_id = placement_id;
}
}
return sock->placement_id;
}
int
spdk_sock_get_optimal_sock_group(struct spdk_sock *sock, struct spdk_sock_group **group)
{
int placement_id = 0, rc;
int placement_id;
rc = sock->net_impl->get_placement_id(sock, &placement_id);
if (!rc && (placement_id != 0)) {
placement_id = sock_get_placement_id(sock);
if (placement_id != 0) {
sock_map_lookup(placement_id, group);
return 0;
} else {
@ -508,8 +524,8 @@ spdk_sock_group_add_sock(struct spdk_sock_group *group, struct spdk_sock *sock,
return -1;
}
rc = sock->net_impl->get_placement_id(sock, &placement_id);
if (!rc && (placement_id != 0)) {
placement_id = sock_get_placement_id(sock);
if (placement_id != 0) {
rc = sock_map_insert(placement_id, group);
if (rc < 0) {
return -1;
@ -557,8 +573,8 @@ spdk_sock_group_remove_sock(struct spdk_sock_group *group, struct spdk_sock *soc
assert(group_impl == sock->group_impl);
rc = sock->net_impl->get_placement_id(sock, &placement_id);
if (!rc && (placement_id != 0)) {
placement_id = sock_get_placement_id(sock);
if (placement_id != 0) {
sock_map_release(placement_id);
}