From aee380b6d8f849c21a5cc54e5d8f2a43fb88b2f2 Mon Sep 17 00:00:00 2001 From: "kay.sievers@vrfy.org" Date: Fri, 10 Sep 2004 21:09:25 -0700 Subject: [PATCH] [PATCH] Fix naming ethernet devices in udevstart On Tue, Sep 07, 2004 at 12:46:43PM +0200, Kay Sievers wrote: > On Mon, 2004-09-06 at 20:18 -0700, Tom Rini wrote: > > I noticed somewhat recently that my enet devices weren't being renamed > > on boot anymore. I don't quite know when this got broken (or rather, if > > it was supposed to be working. I swear it worked for me once..), but > > the following seems to do it. > > I think it never worked in the udevstart case. It worked only with the > hotplug-event-udev, I expect. > > > In udev_scan_class(), look for not just > > %s/%s/dev (which everything with a dev node has), but %s/%s/dev* (both > > of my enet devices, sis900 & 3c59x only have device) and if that > > exists, pass this along to udev. > > Yeah, network devices don't have a devnode and therefore no "dev", but > they are all in /sys/class/net/. We may just test if we are there > instead of the "device" match. How about something like this. It adds all the net devices without looking at the attributes and keeps the remaining logic like it is. It also removes certain levels of indirection and much simplifies the udevstart process. We surely don't need to open and close the udevdb for every node while iterating over the list. (We are about 5% faster on my box) It's not well tested, so it would be nice if someone can have a look at it, before a broken udevstart renders any system unbootable. --- udev.c | 164 ++++++++++++++++++++++++---------------------------- udev.h | 3 + udevstart.c | 24 ++++---- udevtest.c | 2 +- 4 files changed, 92 insertions(+), 101 deletions(-) diff --git a/udev.c b/udev.c index 90c34d80..114ca0a5 100644 --- a/udev.c +++ b/udev.c @@ -40,9 +40,6 @@ char **main_argv; char **main_envp; -/* local variables */ -static int is_udevstart; - #ifdef LOG unsigned char logname[LOGNAME_SIZE]; void log_message(int level, const char *format, ...) @@ -79,36 +76,72 @@ static char *subsystem_blacklist[] = { "" }; -int __udev_hotplug(char *action, const char *devpath, const char *subsystem) +int main(int argc, char *argv[], char *envp[]) { - int retval = -EINVAL; - int i; + main_argv = argv; + main_envp = envp; struct sigaction act; - const int nofake = 0; + char *action; + char *devpath = ""; + char *subsystem = ""; + int i; + int retval = -EINVAL; + enum { + ADD, + REMOVE, + UDEVSTART, + } act_type; - dbg("looking at '%s'", devpath); + dbg("version %s", UDEV_VERSION); - /* we only care about class devices and block stuff */ - if (!strstr(devpath, "class") && - !strstr(devpath, "block")) { - dbg("not a block or class device"); - goto exit; - } + /* initialize our configuration */ + udev_init_config(); - i = 0; - while (subsystem_blacklist[i][0] != '\0') { - if (strcmp(subsystem, subsystem_blacklist[i]) == 0) { - dbg("don't care about '%s' devices", subsystem); + if (strstr(argv[0], "udevstart")) { + act_type = UDEVSTART; + } else { + action = get_action(); + if (!action) { + dbg("no action?"); + goto exit; + } + if (strcmp(action, "add") == 0) { + act_type = ADD; + } else if (strcmp(action, "remove") == 0) { + act_type = REMOVE; + } else { + dbg("unknown action '%s'", action); goto exit; } - i++; - } - /* initialize udev database */ - retval = udevdb_init(UDEVDB_DEFAULT); - if (retval != 0) { - dbg("unable to initialize database"); - goto exit; + devpath = get_devpath(); + if (!devpath) { + dbg("no devpath?"); + goto exit; + } + dbg("looking at '%s'", devpath); + + /* we only care about class devices and block stuff */ + if (strstr(devpath, "class") && strstr(devpath, "block")) { + dbg("not a block or class device"); + goto exit; + } + + subsystem = get_subsystem(main_argv[1]); + if (!subsystem) { + dbg("no subsystem?"); + goto exit; + } + + /* skip blacklisted subsystems */ + i = 0; + while (subsystem_blacklist[i][0] != '\0') { + if (strcmp(subsystem, subsystem_blacklist[i]) == 0) { + dbg("don't care about '%s' devices", subsystem); + goto exit; + } + i++; + } } /* set signal handlers */ @@ -118,76 +151,31 @@ int __udev_hotplug(char *action, const char *devpath, const char *subsystem) sigaction(SIGINT, &act, NULL); sigaction(SIGTERM, &act, NULL); - if (strcmp(action, "add") == 0) { - /* Already done. */ - if (!is_udevstart) - namedev_init(); - retval = udev_add_device(devpath, subsystem, nofake); - goto action_done; + /* initialize udev database */ + if (udevdb_init(UDEVDB_DEFAULT) != 0) { + dbg("unable to initialize database"); + goto exit; } - if (strcmp(action, "remove") == 0) { + switch(act_type) { + case UDEVSTART: + dbg("udevstart"); + namedev_init(); + udev_sleep = 0; + retval = udev_start(); + break; + case ADD: + dbg("udev add"); + namedev_init(); + retval = udev_add_device(devpath, subsystem, NOFAKE); + break; + case REMOVE: + dbg("udev remove"); retval = udev_remove_device(devpath, subsystem); - goto action_done; } - dbg("unknown action '%s'", action); - retval = -EINVAL; - -action_done: udevdb_exit(); exit: return retval; } - -static int udev_hotplug(void) -{ - char *action; - char *devpath; - char *subsystem; - - action = get_action(); - if (!action) { - dbg("no action?"); - return -EINVAL; - } - - devpath = get_devpath(); - if (!devpath) { - dbg("no devpath?"); - return -EINVAL; - } - - /* skip blacklisted subsystems */ - subsystem = get_subsystem(main_argv[1]); - if (!subsystem) { - dbg("no subsystem?"); - return -EINVAL; - } - - return __udev_hotplug(action, devpath, subsystem); -} - -int main(int argc, char *argv[], char *envp[]) -{ - main_argv = argv; - main_envp = envp; - - if (strstr(argv[0], "udevstart")) { - /* Setup env variables. */ - setenv("UDEV_NO_SLEEP", "1", 1); - is_udevstart = 1; - } - - /* initialize our configuration */ - udev_init_config(); - - dbg("version %s", UDEV_VERSION); - - if (is_udevstart) { - namedev_init(); - return udev_start(); - } else - return udev_hotplug(); -} diff --git a/udev.h b/udev.h index 7c5d18a3..d049fc1f 100644 --- a/udev.h +++ b/udev.h @@ -40,6 +40,9 @@ #define LINE_SIZE 256 +#define FAKE 1 +#define NOFAKE 0 + /* length of public data */ #define UDEVICE_LEN (offsetof(struct udevice, bus_id)) diff --git a/udevstart.c b/udevstart.c index 2d5553e9..cb1c7888 100644 --- a/udevstart.c +++ b/udevstart.c @@ -70,18 +70,10 @@ static int device_list_insert(char *path, char *subsystem, struct list_head *dev strfieldcpy(new_device->path, path); strfieldcpy(new_device->subsys, subsystem); list_add_tail(&new_device->list, &loop_device->list); + dbg("add '%s' from subsys '%s'", new_device->path, new_device->subsys); return 0; } -static void udev_exec(const char *path, const char* subsystem) -{ - /* Now call __udev_hotplug(). */ - if (__udev_hotplug("add", path, subsystem)) { - dbg("Calling of udev_hotplug failed"); - exit(1); - } -} - /* list of devices that we should run last due to any one of a number of reasons */ static char *last_list[] = { "/block/dm", /* on here because dm wants to have the block devices around before it */ @@ -106,14 +98,14 @@ static void exec_list(struct list_head *device_list) if (found) continue; - udev_exec(loop_device->path, loop_device->subsys); + udev_add_device(loop_device->path, loop_device->subsys, NOFAKE); list_del(&loop_device->list); free(loop_device); } /* handle the rest of the devices left over, if any */ list_for_each_entry_safe(loop_device, tmp_device, device_list, list) { - udev_exec(loop_device->path, loop_device->subsys); + udev_add_device(loop_device->path, loop_device->subsys, NOFAKE); list_del(&loop_device->list); free(loop_device); } @@ -209,19 +201,27 @@ static void udev_scan_class(void) (strcmp(dent2->d_name, "..") == 0)) continue; + /* pass the net class as it is */ + if (strcmp(dent->d_name, "net") == 0) { + snprintf(dirname2, MAX_PATHLEN, "/class/net/%s", dent2->d_name); + device_list_insert(dirname2, "net", &device_list); + continue; + } + snprintf(dirname2, MAX_PATHLEN, "%s/%s", dirname, dent2->d_name); dirname2[MAX_PATHLEN-1] = '\0'; - dir3 = opendir(dirname2); if (dir3 != NULL) { for (dent3 = readdir(dir3); dent3 != NULL; dent3 = readdir(dir3)) { char filename[MAX_PATHLEN]; + /* pass devices with a "dev" file */ if (strcmp(dent3->d_name, "dev") == 0) { snprintf(filename, MAX_PATHLEN, "/class/%s/%s", dent->d_name, dent2->d_name); filename[MAX_PATHLEN-1] = '\0'; device_list_insert(filename, dent->d_name, &device_list); + break; } } closedir(dir3); diff --git a/udevtest.c b/udevtest.c index 36f223e1..f24c7e4b 100644 --- a/udevtest.c +++ b/udevtest.c @@ -102,7 +102,7 @@ int main(int argc, char *argv[], char *envp[]) subsystem = argv[2]; /* simulate node creation with fake flag */ - udev_add_device(devpath, subsystem, fake); + udev_add_device(devpath, subsystem, FAKE); exit: return 0; -- 2.39.5