diff options
| author |   Florin Coras <fcoras@cisco.com> | 2023-09-18 09:56:21 -0700 |
|---|---|---|
| committer | Florin Coras <fcoras@cisco.com> | 2023-09-18 10:22:35 -0700 |
| commit | ae036d3b7d911788a9ead084bf89dd72c763d9f1 (patch) | |
| tree | d682e732bfaea388cdb1b8f4ddcb0e20a80f565f /src/vcl | |
| parent | 604c627dc31473ead17d5011fb43d6609af2b752 (diff) | |
vcl: unset fifo evt before size check
For blocking sessions, if fifo event still active before size check it
could lead to vpp not generating an event because of race to check flag
in vpp and to eventually unset flag in vcl.
Type: fix
Signed-off-by: Florin Coras <fcoras@cisco.com>
Change-Id: I0e350b9ff92a4e08a9249345ae224589c09d305b
Diffstat (limited to 'src/vcl')
| -rw-r--r-- | src/vcl/vppcom.c | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/src/vcl/vppcom.c b/src/vcl/vppcom.c index 4b2f1f15fbe..e929fa1b6e3 100644 --- a/src/vcl/vppcom.c +++ b/src/vcl/vppcom.c @@ -2052,13 +2052,13 @@ vppcom_session_read_internal (uint32_t session_handle, void *buf, int n, if (svm_fifo_is_empty_cons (rx_fifo)) { + if (is_ct) + svm_fifo_unset_event (s->rx_fifo); + svm_fifo_unset_event (rx_fifo); if (is_nonblocking) { if (vcl_session_is_closing (s)) return vcl_session_closing_error (s); - if (is_ct) - svm_fifo_unset_event (s->rx_fifo); - svm_fifo_unset_event (rx_fifo); return VPPCOM_EWOULDBLOCK; } while (svm_fifo_is_empty_cons (rx_fifo)) @@ -2164,11 +2164,13 @@ vppcom_session_read_segments (uint32_t session_handle, if (svm_fifo_is_empty_cons (rx_fifo)) { + if (is_ct) + svm_fifo_unset_event (s->rx_fifo); + svm_fifo_unset_event (rx_fifo); if (is_nonblocking) { - if (is_ct) - svm_fifo_unset_event (s->rx_fifo); - svm_fifo_unset_event (rx_fifo); + if (vcl_session_is_closing (s)) + return vcl_session_closing_error (s); return VPPCOM_EWOULDBLOCK; } while (svm_fifo_is_empty_cons (rx_fifo)) |