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epoll: Better handling of number of epoll types

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As we already did for flow types, use an "EPOLL_NUM_TYPES" isntead of
EPOLL_TYPE_MAX, which is a little bit safer and clearer.  Add a static
assert on the size of the matching names array.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
This commit is contained in:
David Gibson 2024-01-16 11:50:37 +11:00 committed by Stefano Brivio
parent 36dfa8b8fb
commit 70121ca1ec
2 changed files with 5 additions and 3 deletions
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4
passt.c
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@ -59,7 +59,7 @@
char pkt_buf[PKT_BUF_BYTES] __attribute__ ((aligned(PAGE_SIZE))); char pkt_buf[PKT_BUF_BYTES] __attribute__ ((aligned(PAGE_SIZE)));
char *epoll_type_str[EPOLL_TYPE_MAX + 1] = { char *epoll_type_str[] = {
[EPOLL_TYPE_TCP] = "connected TCP socket", [EPOLL_TYPE_TCP] = "connected TCP socket",
[EPOLL_TYPE_TCP_LISTEN] = "listening TCP socket", [EPOLL_TYPE_TCP_LISTEN] = "listening TCP socket",
[EPOLL_TYPE_TCP_TIMER] = "TCP timer", [EPOLL_TYPE_TCP_TIMER] = "TCP timer",
@ -71,6 +71,8 @@ char *epoll_type_str[EPOLL_TYPE_MAX + 1] = {
[EPOLL_TYPE_TAP_PASST] = "connected qemu socket", [EPOLL_TYPE_TAP_PASST] = "connected qemu socket",
[EPOLL_TYPE_TAP_LISTEN] = "listening qemu socket", [EPOLL_TYPE_TAP_LISTEN] = "listening qemu socket",
}; };
static_assert(ARRAY_SIZE(epoll_type_str) == EPOLL_NUM_TYPES,
"epoll_type_str[] doesn't match enum epoll_type");
/** /**
* post_handler() - Run periodic and deferred tasks for L4 protocol handlers * post_handler() - Run periodic and deferred tasks for L4 protocol handlers

4
passt.h
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@ -70,7 +70,7 @@ enum epoll_type {
/* socket listening for qemu socket connections */ /* socket listening for qemu socket connections */
EPOLL_TYPE_TAP_LISTEN, EPOLL_TYPE_TAP_LISTEN,
EPOLL_TYPE_MAX = EPOLL_TYPE_TAP_LISTEN, EPOLL_NUM_TYPES,
}; };
/** /**
@ -115,7 +115,7 @@ extern char pkt_buf [PKT_BUF_BYTES];
extern char *epoll_type_str[]; extern char *epoll_type_str[];
#define EPOLL_TYPE_STR(n) \ #define EPOLL_TYPE_STR(n) \
(((uint8_t)(n) <= EPOLL_TYPE_MAX && epoll_type_str[(n)]) ? \ (((uint8_t)(n) < EPOLL_NUM_TYPES && epoll_type_str[(n)]) ? \
epoll_type_str[(n)] : "?") epoll_type_str[(n)] : "?")
#include <resolv.h> /* For MAXNS below */ #include <resolv.h> /* For MAXNS below */