[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [PATCH v2 1/3] tools/libs/evtchn: decouple more from mini-os
Mini-OS and libevtchn are using implementation details of each other. Change that by letting libevtchn use the new alloc_file_type() and get_file_from_fd() functions and the generic dev pointer of struct file from Mini-OS. By using private struct declarations Mini-OS will be able to drop the libevtchn specific definitions of struct evtchn_port_info and evtchn_port_list in future. While at it use boll for "pending" and "bound". Switch to use xce as function parameter instead of fd where possible. Signed-off-by: Juergen Gross <jgross@xxxxxxxx> --- V2: - use xce instead of fd as parameter internally (Andrew Cooper) - add alloc_file_type() support --- tools/libs/evtchn/minios.c | 143 +++++++++++++++++++++++-------------- 1 file changed, 91 insertions(+), 52 deletions(-) diff --git a/tools/libs/evtchn/minios.c b/tools/libs/evtchn/minios.c index e5dfdc5ef5..c3a5ce3b98 100644 --- a/tools/libs/evtchn/minios.c +++ b/tools/libs/evtchn/minios.c @@ -38,29 +38,40 @@ #include "private.h" -extern void minios_evtchn_close_fd(int fd); +LIST_HEAD(port_list, port_info); + +struct port_info { + LIST_ENTRY(port_info) list; + evtchn_port_t port; + bool pending; + bool bound; +}; extern struct wait_queue_head event_queue; +int minios_evtchn_close_fd(int fd); + /* XXX Note: This is not threadsafe */ -static struct evtchn_port_info *port_alloc(int fd) +static struct port_info *port_alloc(xenevtchn_handle *xce) { - struct evtchn_port_info *port_info; + struct port_info *port_info; + struct file *file = get_file_from_fd(xce->fd); + struct port_list *port_list = file->dev; - port_info = malloc(sizeof(struct evtchn_port_info)); + port_info = malloc(sizeof(struct port_info)); if ( port_info == NULL ) return NULL; - port_info->pending = 0; + port_info->pending = false; port_info->port = -1; - port_info->bound = 0; + port_info->bound = false; - LIST_INSERT_HEAD(&files[fd].evtchn.ports, port_info, list); + LIST_INSERT_HEAD(port_list, port_info, list); return port_info; } -static void port_dealloc(struct evtchn_port_info *port_info) +static void port_dealloc(struct port_info *port_info) { if ( port_info->bound ) unbind_evtchn(port_info->port); @@ -69,18 +80,54 @@ static void port_dealloc(struct evtchn_port_info *port_info) free(port_info); } +int minios_evtchn_close_fd(int fd) +{ + struct port_info *port_info, *tmp; + struct file *file = get_file_from_fd(fd); + struct port_list *port_list = file->dev; + + LIST_FOREACH_SAFE(port_info, port_list, list, tmp) + port_dealloc(port_info); + free(port_list); + + return 0; +} + +static struct file_ops evtchn_ops = { + .name = "evtchn", + .close = minios_evtchn_close_fd, + .select_rd = select_read_flag, +}; + /* * XENEVTCHN_NO_CLOEXEC is being ignored, as there is no exec() call supported * in Mini-OS. */ int osdep_evtchn_open(xenevtchn_handle *xce, unsigned int flags) { - int fd = alloc_fd(FTYPE_EVTCHN); + int fd; + struct file *file; + struct port_list *list; + static unsigned int ftype_evtchn; - if ( fd == -1 ) + if ( !ftype_evtchn ) + ftype_evtchn = alloc_file_type(&evtchn_ops); + + list = malloc(sizeof(*list)); + if ( !list ) return -1; - LIST_INIT(&files[fd].evtchn.ports); + fd = alloc_fd(ftype_evtchn); + file = get_file_from_fd(fd); + + if ( !file ) + { + free(list); + return -1; + } + + file->dev = list; + LIST_INIT(list); xce->fd = fd; printf("evtchn_open() -> %d\n", fd); @@ -102,16 +149,6 @@ int osdep_evtchn_restrict(xenevtchn_handle *xce, domid_t domid) return -1; } -void minios_evtchn_close_fd(int fd) -{ - struct evtchn_port_info *port_info, *tmp; - - LIST_FOREACH_SAFE(port_info, &files[fd].evtchn.ports, list, tmp) - port_dealloc(port_info); - - files[fd].type = FTYPE_NONE; -} - int xenevtchn_fd(xenevtchn_handle *xce) { return xce->fd; @@ -134,42 +171,43 @@ int xenevtchn_notify(xenevtchn_handle *xce, evtchn_port_t port) static void evtchn_handler(evtchn_port_t port, struct pt_regs *regs, void *data) { - int fd = (int)(intptr_t)data; - struct evtchn_port_info *port_info; + xenevtchn_handle *xce = data; + struct file *file = get_file_from_fd(xce->fd); + struct port_info *port_info; + struct port_list *port_list; - assert(files[fd].type == FTYPE_EVTCHN); + assert(file); + port_list = file->dev; mask_evtchn(port); - LIST_FOREACH(port_info, &files[fd].evtchn.ports, list) + LIST_FOREACH(port_info, port_list, list) { if ( port_info->port == port ) goto found; } - printk("Unknown port for handle %d\n", fd); + printk("Unknown port for handle %d\n", xce->fd); return; found: - port_info->pending = 1; - files[fd].read = 1; + port_info->pending = true; + file->read = true; wake_up(&event_queue); } xenevtchn_port_or_error_t xenevtchn_bind_unbound_port(xenevtchn_handle *xce, uint32_t domid) { - int fd = xce->fd; - struct evtchn_port_info *port_info; + struct port_info *port_info; int ret; evtchn_port_t port; assert(get_current() == main_thread); - port_info = port_alloc(fd); + port_info = port_alloc(xce); if ( port_info == NULL ) return -1; printf("xenevtchn_bind_unbound_port(%d)", domid); - ret = evtchn_alloc_unbound(domid, evtchn_handler, - (void *)(intptr_t)fd, &port); + ret = evtchn_alloc_unbound(domid, evtchn_handler, xce, &port); printf(" = %d\n", ret); if ( ret < 0 ) @@ -179,7 +217,7 @@ xenevtchn_port_or_error_t xenevtchn_bind_unbound_port(xenevtchn_handle *xce, return -1; } - port_info->bound = 1; + port_info->bound = true; port_info->port = port; unmask_evtchn(port); @@ -190,19 +228,18 @@ xenevtchn_port_or_error_t xenevtchn_bind_interdomain(xenevtchn_handle *xce, uint32_t domid, evtchn_port_t remote_port) { - int fd = xce->fd; - struct evtchn_port_info *port_info; + struct port_info *port_info; evtchn_port_t local_port; int ret; assert(get_current() == main_thread); - port_info = port_alloc(fd); + port_info = port_alloc(xce); if ( port_info == NULL ) return -1; printf("xenevtchn_bind_interdomain(%d, %"PRId32")", domid, remote_port); ret = evtchn_bind_interdomain(domid, remote_port, evtchn_handler, - (void *)(intptr_t)fd, &local_port); + xce, &local_port); printf(" = %d\n", ret); if ( ret < 0 ) @@ -212,7 +249,7 @@ xenevtchn_port_or_error_t xenevtchn_bind_interdomain(xenevtchn_handle *xce, return -1; } - port_info->bound = 1; + port_info->bound = true; port_info->port = local_port; unmask_evtchn(local_port); @@ -222,9 +259,11 @@ xenevtchn_port_or_error_t xenevtchn_bind_interdomain(xenevtchn_handle *xce, int xenevtchn_unbind(xenevtchn_handle *xce, evtchn_port_t port) { int fd = xce->fd; - struct evtchn_port_info *port_info; + struct file *file = get_file_from_fd(fd); + struct port_info *port_info; + struct port_list *port_list = file->dev; - LIST_FOREACH(port_info, &files[fd].evtchn.ports, list) + LIST_FOREACH(port_info, port_list, list) { if ( port_info->port == port ) { @@ -243,17 +282,16 @@ int xenevtchn_unbind(xenevtchn_handle *xce, evtchn_port_t port) xenevtchn_port_or_error_t xenevtchn_bind_virq(xenevtchn_handle *xce, unsigned int virq) { - int fd = xce->fd; - struct evtchn_port_info *port_info; + struct port_info *port_info; evtchn_port_t port; assert(get_current() == main_thread); - port_info = port_alloc(fd); + port_info = port_alloc(xce); if ( port_info == NULL ) return -1; printf("xenevtchn_bind_virq(%d)", virq); - port = bind_virq(virq, evtchn_handler, (void *)(intptr_t)fd); + port = bind_virq(virq, evtchn_handler, xce); printf(" = %d\n", port); if ( port < 0 ) @@ -263,7 +301,7 @@ xenevtchn_port_or_error_t xenevtchn_bind_virq(xenevtchn_handle *xce, return -1; } - port_info->bound = 1; + port_info->bound = true; port_info->port = port; unmask_evtchn(port); @@ -272,27 +310,28 @@ xenevtchn_port_or_error_t xenevtchn_bind_virq(xenevtchn_handle *xce, xenevtchn_port_or_error_t xenevtchn_pending(xenevtchn_handle *xce) { - int fd = xce->fd; - struct evtchn_port_info *port_info; + struct file *file = get_file_from_fd(xce->fd); + struct port_info *port_info; + struct port_list *port_list = file->dev; unsigned long flags; evtchn_port_t ret = -1; local_irq_save(flags); - files[fd].read = 0; + file->read = false; - LIST_FOREACH(port_info, &files[fd].evtchn.ports, list) + LIST_FOREACH(port_info, port_list, list) { if ( port_info->port != -1 && port_info->pending ) { if ( ret == -1 ) { ret = port_info->port; - port_info->pending = 0; + port_info->pending = false; } else { - files[fd].read = 1; + file->read = true; break; } } -- 2.26.2
|
Lists.xenproject.org is hosted with RackSpace, monitoring our |