diff options
Diffstat (limited to '')
| -rw-r--r-- | minadbd/Android.mk | 3 | ||||
| -rw-r--r-- | minadbd/fdevent.c | 695 |
2 files changed, 0 insertions, 698 deletions
diff --git a/minadbd/Android.mk b/minadbd/Android.mk index 04956d870..c07715706 100644 --- a/minadbd/Android.mk +++ b/minadbd/Android.mk @@ -12,7 +12,6 @@ include $(CLEAR_VARS) LOCAL_SRC_FILES := \ adb.c \ - fdevent.c \ fuse_adb_provider.c \ transport.c \ transport_usb.c \ @@ -27,6 +26,4 @@ LOCAL_C_INCLUDES += bootable/recovery LOCAL_MODULE := libminadbd -LOCAL_STATIC_LIBRARIES := libfusesideload libcutils libc - include $(BUILD_STATIC_LIBRARY) diff --git a/minadbd/fdevent.c b/minadbd/fdevent.c deleted file mode 100644 index 5c374a71b..000000000 --- a/minadbd/fdevent.c +++ /dev/null @@ -1,695 +0,0 @@ -/* http://frotznet.googlecode.com/svn/trunk/utils/fdevent.c -** -** Copyright 2006, Brian Swetland <swetland@frotz.net> -** -** Licensed under the Apache License, Version 2.0 (the "License"); -** you may not use this file except in compliance with the License. -** You may obtain a copy of the License at -** -** http://www.apache.org/licenses/LICENSE-2.0 -** -** Unless required by applicable law or agreed to in writing, software -** distributed under the License is distributed on an "AS IS" BASIS, -** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -** See the License for the specific language governing permissions and -** limitations under the License. -*/ - -#include <sys/ioctl.h> - -#include <stdlib.h> -#include <stdio.h> -#include <string.h> -#include <unistd.h> -#include <errno.h> - -#include <fcntl.h> - -#include <stdarg.h> -#include <stddef.h> - -#include "fdevent.h" -#include "transport.h" -#include "sysdeps.h" - - -/* !!! Do not enable DEBUG for the adb that will run as the server: -** both stdout and stderr are used to communicate between the client -** and server. Any extra output will cause failures. -*/ -#define DEBUG 0 /* non-0 will break adb server */ - -// This socket is used when a subproc shell service exists. -// It wakes up the fdevent_loop() and cause the correct handling -// of the shell's pseudo-tty master. I.e. force close it. -int SHELL_EXIT_NOTIFY_FD = -1; - -static void fatal(const char *fn, const char *fmt, ...) -{ - va_list ap; - va_start(ap, fmt); - fprintf(stderr, "%s:", fn); - vfprintf(stderr, fmt, ap); - va_end(ap); - abort(); -} - -#define FATAL(x...) fatal(__FUNCTION__, x) - -#if DEBUG -#define D(...) \ - do { \ - adb_mutex_lock(&D_lock); \ - int save_errno = errno; \ - fprintf(stderr, "%s::%s():", __FILE__, __FUNCTION__); \ - errno = save_errno; \ - fprintf(stderr, __VA_ARGS__); \ - adb_mutex_unlock(&D_lock); \ - errno = save_errno; \ - } while(0) -static void dump_fde(fdevent *fde, const char *info) -{ - adb_mutex_lock(&D_lock); - fprintf(stderr,"FDE #%03d %c%c%c %s\n", fde->fd, - fde->state & FDE_READ ? 'R' : ' ', - fde->state & FDE_WRITE ? 'W' : ' ', - fde->state & FDE_ERROR ? 'E' : ' ', - info); - adb_mutex_unlock(&D_lock); -} -#else -#define D(...) ((void)0) -#define dump_fde(fde, info) do { } while(0) -#endif - -#define FDE_EVENTMASK 0x00ff -#define FDE_STATEMASK 0xff00 - -#define FDE_ACTIVE 0x0100 -#define FDE_PENDING 0x0200 -#define FDE_CREATED 0x0400 - -static void fdevent_plist_enqueue(fdevent *node); -static void fdevent_plist_remove(fdevent *node); -static fdevent *fdevent_plist_dequeue(void); -static void fdevent_subproc_event_func(int fd, unsigned events, void *userdata); - -static fdevent list_pending = { - .next = &list_pending, - .prev = &list_pending, -}; - -static fdevent **fd_table = 0; -static int fd_table_max = 0; - -#ifdef CRAPTASTIC -//HAVE_EPOLL - -#include <sys/epoll.h> - -static int epoll_fd = -1; - -static void fdevent_init() -{ - /* XXX: what's a good size for the passed in hint? */ - epoll_fd = epoll_create(256); - - if(epoll_fd < 0) { - perror("epoll_create() failed"); - exit(1); - } - - /* mark for close-on-exec */ - fcntl(epoll_fd, F_SETFD, FD_CLOEXEC); -} - -static void fdevent_connect(fdevent *fde) -{ - struct epoll_event ev; - - memset(&ev, 0, sizeof(ev)); - ev.events = 0; - ev.data.ptr = fde; - -#if 0 - if(epoll_ctl(epoll_fd, EPOLL_CTL_ADD, fde->fd, &ev)) { - perror("epoll_ctl() failed\n"); - exit(1); - } -#endif -} - -static void fdevent_disconnect(fdevent *fde) -{ - struct epoll_event ev; - - memset(&ev, 0, sizeof(ev)); - ev.events = 0; - ev.data.ptr = fde; - - /* technically we only need to delete if we - ** were actively monitoring events, but let's - ** be aggressive and do it anyway, just in case - ** something's out of sync - */ - epoll_ctl(epoll_fd, EPOLL_CTL_DEL, fde->fd, &ev); -} - -static void fdevent_update(fdevent *fde, unsigned events) -{ - struct epoll_event ev; - int active; - - active = (fde->state & FDE_EVENTMASK) != 0; - - memset(&ev, 0, sizeof(ev)); - ev.events = 0; - ev.data.ptr = fde; - - if(events & FDE_READ) ev.events |= EPOLLIN; - if(events & FDE_WRITE) ev.events |= EPOLLOUT; - if(events & FDE_ERROR) ev.events |= (EPOLLERR | EPOLLHUP); - - fde->state = (fde->state & FDE_STATEMASK) | events; - - if(active) { - /* we're already active. if we're changing to *no* - ** events being monitored, we need to delete, otherwise - ** we need to just modify - */ - if(ev.events) { - if(epoll_ctl(epoll_fd, EPOLL_CTL_MOD, fde->fd, &ev)) { - perror("epoll_ctl() failed\n"); - exit(1); - } - } else { - if(epoll_ctl(epoll_fd, EPOLL_CTL_DEL, fde->fd, &ev)) { - perror("epoll_ctl() failed\n"); - exit(1); - } - } - } else { - /* we're not active. if we're watching events, we need - ** to add, otherwise we can just do nothing - */ - if(ev.events) { - if(epoll_ctl(epoll_fd, EPOLL_CTL_ADD, fde->fd, &ev)) { - perror("epoll_ctl() failed\n"); - exit(1); - } - } - } -} - -static void fdevent_process() -{ - struct epoll_event events[256]; - fdevent *fde; - int i, n; - - n = epoll_wait(epoll_fd, events, 256, -1); - - if(n < 0) { - if(errno == EINTR) return; - perror("epoll_wait"); - exit(1); - } - - for(i = 0; i < n; i++) { - struct epoll_event *ev = events + i; - fde = ev->data.ptr; - - if(ev->events & EPOLLIN) { - fde->events |= FDE_READ; - } - if(ev->events & EPOLLOUT) { - fde->events |= FDE_WRITE; - } - if(ev->events & (EPOLLERR | EPOLLHUP)) { - fde->events |= FDE_ERROR; - } - if(fde->events) { - if(fde->state & FDE_PENDING) continue; - fde->state |= FDE_PENDING; - fdevent_plist_enqueue(fde); - } - } -} - -#else /* USE_SELECT */ - -#ifdef HAVE_WINSOCK -#include <winsock2.h> -#else -#include <sys/select.h> -#endif - -static fd_set read_fds; -static fd_set write_fds; -static fd_set error_fds; - -static int select_n = 0; - -static void fdevent_init(void) -{ - FD_ZERO(&read_fds); - FD_ZERO(&write_fds); - FD_ZERO(&error_fds); -} - -static void fdevent_connect(fdevent *fde) -{ - if(fde->fd >= select_n) { - select_n = fde->fd + 1; - } -} - -static void fdevent_disconnect(fdevent *fde) -{ - int i, n; - - FD_CLR(fde->fd, &read_fds); - FD_CLR(fde->fd, &write_fds); - FD_CLR(fde->fd, &error_fds); - - for(n = 0, i = 0; i < select_n; i++) { - if(fd_table[i] != 0) n = i; - } - select_n = n + 1; -} - -static void fdevent_update(fdevent *fde, unsigned events) -{ - if(events & FDE_READ) { - FD_SET(fde->fd, &read_fds); - } else { - FD_CLR(fde->fd, &read_fds); - } - if(events & FDE_WRITE) { - FD_SET(fde->fd, &write_fds); - } else { - FD_CLR(fde->fd, &write_fds); - } - if(events & FDE_ERROR) { - FD_SET(fde->fd, &error_fds); - } else { - FD_CLR(fde->fd, &error_fds); - } - - fde->state = (fde->state & FDE_STATEMASK) | events; -} - -/* Looks at fd_table[] for bad FDs and sets bit in fds. -** Returns the number of bad FDs. -*/ -static int fdevent_fd_check(fd_set *fds) -{ - int i, n = 0; - fdevent *fde; - - for(i = 0; i < select_n; i++) { - fde = fd_table[i]; - if(fde == 0) continue; - if(fcntl(i, F_GETFL, NULL) < 0) { - FD_SET(i, fds); - n++; - // fde->state |= FDE_DONT_CLOSE; - - } - } - return n; -} - -#if !DEBUG -static inline void dump_all_fds(const char *extra_msg) {} -#else -static void dump_all_fds(const char *extra_msg) -{ -int i; - fdevent *fde; - // per fd: 4 digits (but really: log10(FD_SETSIZE)), 1 staus, 1 blank - char msg_buff[FD_SETSIZE*6 + 1], *pb=msg_buff; - size_t max_chars = FD_SETSIZE * 6 + 1; - int printed_out; -#define SAFE_SPRINTF(...) \ - do { \ - printed_out = snprintf(pb, max_chars, __VA_ARGS__); \ - if (printed_out <= 0) { \ - D("... snprintf failed.\n"); \ - return; \ - } \ - if (max_chars < (unsigned int)printed_out) { \ - D("... snprintf out of space.\n"); \ - return; \ - } \ - pb += printed_out; \ - max_chars -= printed_out; \ - } while(0) - - for(i = 0; i < select_n; i++) { - fde = fd_table[i]; - SAFE_SPRINTF("%d", i); - if(fde == 0) { - SAFE_SPRINTF("? "); - continue; - } - if(fcntl(i, F_GETFL, NULL) < 0) { - SAFE_SPRINTF("b"); - } - SAFE_SPRINTF(" "); - } - D("%s fd_table[]->fd = {%s}\n", extra_msg, msg_buff); -} -#endif - -static void fdevent_process() -{ - int i, n; - fdevent *fde; - unsigned events; - fd_set rfd, wfd, efd; - - memcpy(&rfd, &read_fds, sizeof(fd_set)); - memcpy(&wfd, &write_fds, sizeof(fd_set)); - memcpy(&efd, &error_fds, sizeof(fd_set)); - - dump_all_fds("pre select()"); - - n = select(select_n, &rfd, &wfd, &efd, NULL); - int saved_errno = errno; - D("select() returned n=%d, errno=%d\n", n, n<0?saved_errno:0); - - dump_all_fds("post select()"); - - if(n < 0) { - switch(saved_errno) { - case EINTR: return; - case EBADF: - // Can't trust the FD sets after an error. - FD_ZERO(&wfd); - FD_ZERO(&efd); - FD_ZERO(&rfd); - break; - default: - D("Unexpected select() error=%d\n", saved_errno); - return; - } - } - if(n <= 0) { - // We fake a read, as the rest of the code assumes - // that errors will be detected at that point. - n = fdevent_fd_check(&rfd); - } - - for(i = 0; (i < select_n) && (n > 0); i++) { - events = 0; - if(FD_ISSET(i, &rfd)) { events |= FDE_READ; n--; } - if(FD_ISSET(i, &wfd)) { events |= FDE_WRITE; n--; } - if(FD_ISSET(i, &efd)) { events |= FDE_ERROR; n--; } - - if(events) { - fde = fd_table[i]; - if(fde == 0) - FATAL("missing fde for fd %d\n", i); - - fde->events |= events; - - D("got events fde->fd=%d events=%04x, state=%04x\n", - fde->fd, fde->events, fde->state); - if(fde->state & FDE_PENDING) continue; - fde->state |= FDE_PENDING; - fdevent_plist_enqueue(fde); - } - } -} - -#endif - -static void fdevent_register(fdevent *fde) -{ - if(fde->fd < 0) { - FATAL("bogus negative fd (%d)\n", fde->fd); - } - - if(fde->fd >= fd_table_max) { - int oldmax = fd_table_max; - if(fde->fd > 32000) { - FATAL("bogus huuuuge fd (%d)\n", fde->fd); - } - if(fd_table_max == 0) { - fdevent_init(); - fd_table_max = 256; - } - while(fd_table_max <= fde->fd) { - fd_table_max *= 2; - } - fd_table = realloc(fd_table, sizeof(fdevent*) * fd_table_max); - if(fd_table == 0) { - FATAL("could not expand fd_table to %d entries\n", fd_table_max); - } - memset(fd_table + oldmax, 0, sizeof(int) * (fd_table_max - oldmax)); - } - - fd_table[fde->fd] = fde; -} - -static void fdevent_unregister(fdevent *fde) -{ - if((fde->fd < 0) || (fde->fd >= fd_table_max)) { - FATAL("fd out of range (%d)\n", fde->fd); - } - - if(fd_table[fde->fd] != fde) { - FATAL("fd_table out of sync [%d]\n", fde->fd); - } - - fd_table[fde->fd] = 0; - - if(!(fde->state & FDE_DONT_CLOSE)) { - dump_fde(fde, "close"); - adb_close(fde->fd); - } -} - -static void fdevent_plist_enqueue(fdevent *node) -{ - fdevent *list = &list_pending; - - node->next = list; - node->prev = list->prev; - node->prev->next = node; - list->prev = node; -} - -static void fdevent_plist_remove(fdevent *node) -{ - node->prev->next = node->next; - node->next->prev = node->prev; - node->next = 0; - node->prev = 0; -} - -static fdevent *fdevent_plist_dequeue(void) -{ - fdevent *list = &list_pending; - fdevent *node = list->next; - - if(node == list) return 0; - - list->next = node->next; - list->next->prev = list; - node->next = 0; - node->prev = 0; - - return node; -} - -static void fdevent_call_fdfunc(fdevent* fde) -{ - unsigned events = fde->events; - fde->events = 0; - if(!(fde->state & FDE_PENDING)) return; - fde->state &= (~FDE_PENDING); - dump_fde(fde, "callback"); - fde->func(fde->fd, events, fde->arg); -} - -static void fdevent_subproc_event_func(int fd, unsigned ev, void *userdata) -{ - - D("subproc handling on fd=%d ev=%04x\n", fd, ev); - - // Hook oneself back into the fde's suitable for select() on read. - if((fd < 0) || (fd >= fd_table_max)) { - FATAL("fd %d out of range for fd_table \n", fd); - } - fdevent *fde = fd_table[fd]; - fdevent_add(fde, FDE_READ); - - if(ev & FDE_READ){ - int subproc_fd; - - if(readx(fd, &subproc_fd, sizeof(subproc_fd))) { - FATAL("Failed to read the subproc's fd from fd=%d\n", fd); - } - if((subproc_fd < 0) || (subproc_fd >= fd_table_max)) { - D("subproc_fd %d out of range 0, fd_table_max=%d\n", - subproc_fd, fd_table_max); - return; - } - fdevent *subproc_fde = fd_table[subproc_fd]; - if(!subproc_fde) { - D("subproc_fd %d cleared from fd_table\n", subproc_fd); - return; - } - if(subproc_fde->fd != subproc_fd) { - // Already reallocated? - D("subproc_fd %d != fd_table[].fd %d\n", subproc_fd, subproc_fde->fd); - return; - } - - subproc_fde->force_eof = 1; - - int rcount = 0; - ioctl(subproc_fd, FIONREAD, &rcount); - D("subproc with fd=%d has rcount=%d err=%d\n", - subproc_fd, rcount, errno); - - if(rcount) { - // If there is data left, it will show up in the select(). - // This works because there is no other thread reading that - // data when in this fd_func(). - return; - } - - D("subproc_fde.state=%04x\n", subproc_fde->state); - subproc_fde->events |= FDE_READ; - if(subproc_fde->state & FDE_PENDING) { - return; - } - subproc_fde->state |= FDE_PENDING; - fdevent_call_fdfunc(subproc_fde); - } -} - -fdevent *fdevent_create(int fd, fd_func func, void *arg) -{ - fdevent *fde = (fdevent*) malloc(sizeof(fdevent)); - if(fde == 0) return 0; - fdevent_install(fde, fd, func, arg); - fde->state |= FDE_CREATED; - return fde; -} - -void fdevent_destroy(fdevent *fde) -{ - if(fde == 0) return; - if(!(fde->state & FDE_CREATED)) { - FATAL("fde %p not created by fdevent_create()\n", fde); - } - fdevent_remove(fde); -} - -void fdevent_install(fdevent *fde, int fd, fd_func func, void *arg) -{ - memset(fde, 0, sizeof(fdevent)); - fde->state = FDE_ACTIVE; - fde->fd = fd; - fde->force_eof = 0; - fde->func = func; - fde->arg = arg; - -#ifndef HAVE_WINSOCK - fcntl(fd, F_SETFL, O_NONBLOCK); -#endif - fdevent_register(fde); - dump_fde(fde, "connect"); - fdevent_connect(fde); - fde->state |= FDE_ACTIVE; -} - -void fdevent_remove(fdevent *fde) -{ - if(fde->state & FDE_PENDING) { - fdevent_plist_remove(fde); - } - - if(fde->state & FDE_ACTIVE) { - fdevent_disconnect(fde); - dump_fde(fde, "disconnect"); - fdevent_unregister(fde); - } - - fde->state = 0; - fde->events = 0; -} - - -void fdevent_set(fdevent *fde, unsigned events) -{ - events &= FDE_EVENTMASK; - - if((fde->state & FDE_EVENTMASK) == events) return; - - if(fde->state & FDE_ACTIVE) { - fdevent_update(fde, events); - dump_fde(fde, "update"); - } - - fde->state = (fde->state & FDE_STATEMASK) | events; - - if(fde->state & FDE_PENDING) { - /* if we're pending, make sure - ** we don't signal an event that - ** is no longer wanted. - */ - fde->events &= (~events); - if(fde->events == 0) { - fdevent_plist_remove(fde); - fde->state &= (~FDE_PENDING); - } - } -} - -void fdevent_add(fdevent *fde, unsigned events) -{ - fdevent_set( - fde, (fde->state & FDE_EVENTMASK) | (events & FDE_EVENTMASK)); -} - -void fdevent_del(fdevent *fde, unsigned events) -{ - fdevent_set( - fde, (fde->state & FDE_EVENTMASK) & (~(events & FDE_EVENTMASK))); -} - -void fdevent_subproc_setup() -{ - int s[2]; - - if(adb_socketpair(s)) { - FATAL("cannot create shell-exit socket-pair\n"); - } - SHELL_EXIT_NOTIFY_FD = s[0]; - fdevent *fde; - fde = fdevent_create(s[1], fdevent_subproc_event_func, NULL); - if(!fde) - FATAL("cannot create fdevent for shell-exit handler\n"); - fdevent_add(fde, FDE_READ); -} - -void fdevent_loop() -{ - fdevent *fde; - fdevent_subproc_setup(); - - for(;;) { - D("--- ---- waiting for events\n"); - - fdevent_process(); - - while((fde = fdevent_plist_dequeue())) { - fdevent_call_fdfunc(fde); - } - } -} |