haraldwolff/qemu-patch-raspberry4
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ivshmem-server: use a uint16 for client ID

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In practice, the number of VM is limited to MAXUINT16 in ivshmem, so use
the same limit on the server (removes a theorical infinite loop)

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Claudio Fontana <claudio.fontana@huawei.com>
This commit is contained in:
Marc-André Lureau 2015-06-23 17:09:59 +02:00
parent 95204aa951
commit 022cffe313
2 changed files with 11 additions and 2 deletions
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11
contrib/ivshmem-server/ivshmem-server.c
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@ -145,9 +145,18 @@ ivshmem_server_handle_new_conn(IvshmemServer *server)
peer->sock_fd = newfd;
/* get an unused peer id */
while (ivshmem_server_search_peer(server, server->cur_id) != NULL) {
/* XXX: this could use id allocation such as Linux IDA, or simply
* a free-list */
for (i = 0; i < G_MAXUINT16; i++) {
if (ivshmem_server_search_peer(server, server->cur_id) == NULL) {
break;
}
server->cur_id++;
}
if (i == G_MAXUINT16) {
IVSHMEM_SERVER_DEBUG(server, "cannot allocate new client id\n");
goto fail;
}
peer->id = server->cur_id++;
/* create eventfd, one per vector */

2
contrib/ivshmem-server/ivshmem-server.h
View file

@ -71,7 +71,7 @@ typedef struct IvshmemServer {
size_t shm_size; /**< size of shm */
int shm_fd; /**< shm file descriptor */
unsigned n_vectors; /**< number of vectors */
long cur_id; /**< id to be given to next client */
uint16_t cur_id; /**< id to be given to next client */
bool verbose; /**< true in verbose mode */
IvshmemServerPeerList peer_list; /**< list of peers */
} IvshmemServer;