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Code Issues Releases Wiki Activity

dpif-linux: Add thread-safety annotations.

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Signed-off-by: Alex Wang <alexw@nicira.com>
Acked-by: Ethan Jackson <ethan@nicira.com>
This commit is contained in:
Alex Wang
2014-04-17 17:16:34 -07:00
parent 9b00386ba6
commit b90de03449
1 changed files with 47 additions and 15 deletions
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62
lib/dpif-linux.c
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@@ -180,7 +180,8 @@ static int dpif_linux_init(void);
static int open_dpif(const struct dpif_linux_dp *, struct dpif **);
static uint32_t dpif_linux_port_get_pid(const struct dpif *,
odp_port_t port_no, uint32_t hash);
static int dpif_linux_refresh_channels(struct dpif_linux *, uint32_t n_handlers);
static int dpif_linux_refresh_channels(struct dpif_linux *,
uint32_t n_handlers);
static void dpif_linux_vport_to_ofpbuf(const struct dpif_linux_vport *,
struct ofpbuf *);
static int dpif_linux_vport_from_ofpbuf(struct dpif_linux_vport *,
@@ -459,7 +460,7 @@ vport_del_channels(struct dpif_linux *dpif, odp_port_t port_no)
}
static void
destroy_all_channels(struct dpif_linux *dpif)
destroy_all_channels(struct dpif_linux *dpif) OVS_REQ_WRLOCK(dpif->upcall_lock)
{
unsigned int i;
@@ -625,6 +626,7 @@ netdev_to_ovs_vport_type(const struct netdev *netdev)
static int
dpif_linux_port_add__(struct dpif_linux *dpif, struct netdev *netdev,
odp_port_t *port_nop)
OVS_REQ_WRLOCK(dpif->upcall_lock)
{
const struct netdev_tunnel_config *tnl_cfg;
char namebuf[NETDEV_VPORT_NAME_BUFSIZE];
@@ -731,6 +733,7 @@ dpif_linux_port_add(struct dpif *dpif_, struct netdev *netdev,
static int
dpif_linux_port_del__(struct dpif_linux *dpif, odp_port_t port_no)
OVS_REQ_WRLOCK(dpif->upcall_lock)
{
struct dpif_linux_vport vport;
int error;
@@ -809,14 +812,13 @@ dpif_linux_port_query_by_name(const struct dpif *dpif_, const char *devname,
}
static uint32_t
dpif_linux_port_get_pid(const struct dpif *dpif_, odp_port_t port_no,
uint32_t hash)
dpif_linux_port_get_pid__(const struct dpif_linux *dpif, odp_port_t port_no,
uint32_t hash)
OVS_REQ_RDLOCK(dpif->upcall_lock)
{
struct dpif_linux *dpif = dpif_linux_cast(dpif_);
uint32_t port_idx = odp_to_u32(port_no);
uint32_t pid = 0;
fat_rwlock_rdlock(&dpif->upcall_lock);
if (dpif->handlers) {
/* The ODPP_NONE "reserved" port number uses the "ovs-system"'s
* channel, since it is not heavily loaded. */
@@ -825,11 +827,24 @@ dpif_linux_port_get_pid(const struct dpif *dpif_, odp_port_t port_no,
pid = nl_sock_pid(h->channels[idx].sock);
}
fat_rwlock_unlock(&dpif->upcall_lock);
return pid;
}
static uint32_t
dpif_linux_port_get_pid(const struct dpif *dpif_, odp_port_t port_no,
uint32_t hash)
{
const struct dpif_linux *dpif = dpif_linux_cast(dpif_);
uint32_t ret;
fat_rwlock_rdlock(&dpif->upcall_lock);
ret = dpif_linux_port_get_pid__(dpif, port_no, hash);
fat_rwlock_unlock(&dpif->upcall_lock);
return ret;
}
static int
dpif_linux_flow_flush(struct dpif *dpif_)
{
@@ -1461,6 +1476,7 @@ dpif_linux_operate(struct dpif *dpif_, struct dpif_op **ops, size_t n_ops)
* backing kernel vports. */
static int
dpif_linux_refresh_channels(struct dpif_linux *dpif, uint32_t n_handlers)
OVS_REQ_WRLOCK(dpif->upcall_lock)
{
unsigned long int *keep_channels;
struct dpif_linux_vport vport;
@@ -1586,6 +1602,7 @@ dpif_linux_refresh_channels(struct dpif_linux *dpif, uint32_t n_handlers)
static int
dpif_linux_recv_set__(struct dpif_linux *dpif, bool enable)
OVS_REQ_WRLOCK(dpif->upcall_lock)
{
if ((dpif->handlers != NULL) == enable) {
return 0;
@@ -1702,6 +1719,7 @@ parse_odp_packet(struct ofpbuf *buf, struct dpif_upcall *upcall,
static int
dpif_linux_recv__(struct dpif_linux *dpif, uint32_t handler_id,
struct dpif_upcall *upcall, struct ofpbuf *buf)
OVS_REQ_RDLOCK(dpif->upcall_lock)
{
struct dpif_handler *handler;
int read_tries = 0;
@@ -1787,25 +1805,30 @@ dpif_linux_recv(struct dpif *dpif_, uint32_t handler_id,
}
static void
dpif_linux_recv_wait(struct dpif *dpif_, uint32_t handler_id)
dpif_linux_recv_wait__(struct dpif_linux *dpif, uint32_t handler_id)
OVS_REQ_RDLOCK(dpif->upcall_lock)
{
struct dpif_linux *dpif = dpif_linux_cast(dpif_);
fat_rwlock_rdlock(&dpif->upcall_lock);
if (dpif->handlers && handler_id < dpif->n_handlers) {
struct dpif_handler *handler = &dpif->handlers[handler_id];
poll_fd_wait(handler->epoll_fd, POLLIN);
}
}
static void
dpif_linux_recv_wait(struct dpif *dpif_, uint32_t handler_id)
{
struct dpif_linux *dpif = dpif_linux_cast(dpif_);
fat_rwlock_rdlock(&dpif->upcall_lock);
dpif_linux_recv_wait__(dpif, handler_id);
fat_rwlock_unlock(&dpif->upcall_lock);
}
static void
dpif_linux_recv_purge(struct dpif *dpif_)
dpif_linux_recv_purge__(struct dpif_linux *dpif)
OVS_REQ_WRLOCK(dpif->upcall_lock)
{
struct dpif_linux *dpif = dpif_linux_cast(dpif_);
fat_rwlock_wrlock(&dpif->upcall_lock);
if (dpif->handlers) {
size_t i, j;
@@ -1819,6 +1842,15 @@ dpif_linux_recv_purge(struct dpif *dpif_)
}
}
}
}
static void
dpif_linux_recv_purge(struct dpif *dpif_)
{
struct dpif_linux *dpif = dpif_linux_cast(dpif_);
fat_rwlock_wrlock(&dpif->upcall_lock);
dpif_linux_recv_purge__(dpif);
fat_rwlock_unlock(&dpif->upcall_lock);
}