From: Marc-André Lureau <marcandre.lur...@gmail.com>
In practice, the number of VM is limited to MAXUINT16 in ivshmem, so use
the same limit on the server.
Signed-off-by: Marc-André Lureau <marcandre.lur...@redhat.com>
---
contrib/ivshmem-server/ivshmem-server.c | 11 ++++++++++-
contrib/ivshmem-server/ivshmem-server.h | 2 +-
2 files changed, 11 insertions(+), 2 deletions(-)
diff --git a/contrib/ivshmem-server/ivshmem-server.c
b/contrib/ivshmem-server/ivshmem-server.c
index 16ee583..972fda2 100644
--- a/contrib/ivshmem-server/ivshmem-server.c
+++ b/contrib/ivshmem-server/ivshmem-server.c
@@ -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 */
diff --git a/contrib/ivshmem-server/ivshmem-server.h
b/contrib/ivshmem-server/ivshmem-server.h
index cd584fc..2176d5e 100644
--- a/contrib/ivshmem-server/ivshmem-server.h
+++ b/contrib/ivshmem-server/ivshmem-server.h
@@ -70,7 +70,7 @@ 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;
--
2.4.3
