From d46f37fdee02ab5f906518b3c08886cd0eb0a6c8 Mon Sep 17 00:00:00 2001 From: Kay Sievers Date: Fri, 29 Aug 2008 20:32:05 +0200 Subject: [PATCH] split udev_device.c to leave out rules handling from libudev --- udev/Makefile.am | 1 + udev/udev.h | 4 +- udev/udev_device.c | 224 --------------------------------- udev/udev_device_event.c | 259 +++++++++++++++++++++++++++++++++++++++ 4 files changed, 263 insertions(+), 225 deletions(-) create mode 100644 udev/udev_device_event.c diff --git a/udev/Makefile.am b/udev/Makefile.am index d9f14057..4a7c7855 100644 --- a/udev/Makefile.am +++ b/udev/Makefile.am @@ -24,6 +24,7 @@ common_files = \ udev_config.c \ udev_db.c \ udev_device.c \ + udev_device_event.c \ udev_node.c \ udev_rules.c \ udev_rules_parse.c \ diff --git a/udev/udev.h b/udev/udev.h index 2648e2aa..b6338073 100644 --- a/udev/udev.h +++ b/udev/udev.h @@ -103,9 +103,11 @@ extern void udev_config_init(void); /* udev_device.c */ extern struct udevice *udev_device_init(struct udevice *udev); extern void udev_device_cleanup(struct udevice *udev); -extern int udev_device_event(struct udev_rules *rules, struct udevice *udev); extern dev_t udev_device_get_devt(struct udevice *udev); +/* udev_device_event.c */ +extern int udev_device_event(struct udev_rules *rules, struct udevice *udev); + /* udev_sysfs.c */ extern char sysfs_path[PATH_SIZE]; extern int sysfs_init(void); diff --git a/udev/udev_device.c b/udev/udev_device.c index bce5b299..98886763 100644 --- a/udev/udev_device.c +++ b/udev/udev_device.c @@ -80,227 +80,3 @@ dev_t udev_device_get_devt(struct udevice *udev) } return makedev(0, 0); } - -static void kernel_log(struct ifreq ifr) -{ - int klog; - FILE *f; - - klog = open("/dev/kmsg", O_WRONLY); - if (klog < 0) - return; - - f = fdopen(klog, "w"); - if (f == NULL) { - close(klog); - return; - } - - fprintf(f, "<6>udev: renamed network interface %s to %s\n", - ifr.ifr_name, ifr.ifr_newname); - fclose(f); -} - -static int rename_netif(struct udevice *udev) -{ - int sk; - struct ifreq ifr; - int retval; - - info("changing net interface name from '%s' to '%s'\n", udev->dev->kernel, udev->name); - if (udev->test_run) - return 0; - - sk = socket(PF_INET, SOCK_DGRAM, 0); - if (sk < 0) { - err("error opening socket: %s\n", strerror(errno)); - return -1; - } - - memset(&ifr, 0x00, sizeof(struct ifreq)); - strlcpy(ifr.ifr_name, udev->dev->kernel, IFNAMSIZ); - strlcpy(ifr.ifr_newname, udev->name, IFNAMSIZ); - retval = ioctl(sk, SIOCSIFNAME, &ifr); - if (retval == 0) - kernel_log(ifr); - else { - int loop; - - /* see if the destination interface name already exists */ - if (errno != EEXIST) { - err("error changing netif name %s to %s: %s\n", ifr.ifr_name, ifr.ifr_newname, strerror(errno)); - goto exit; - } - - /* free our own name, another process may wait for us */ - strlcpy(ifr.ifr_newname, udev->dev->kernel, IFNAMSIZ); - strlcat(ifr.ifr_newname, "_rename", IFNAMSIZ); - retval = ioctl(sk, SIOCSIFNAME, &ifr); - if (retval != 0) { - err("error changing netif name %s to %s: %s\n", ifr.ifr_name, ifr.ifr_newname, strerror(errno)); - goto exit; - } - - /* wait 30 seconds for our target to become available */ - strlcpy(ifr.ifr_name, ifr.ifr_newname, IFNAMSIZ); - strlcpy(ifr.ifr_newname, udev->name, IFNAMSIZ); - loop = 30 * 20; - while (loop--) { - retval = ioctl(sk, SIOCSIFNAME, &ifr); - if (retval == 0) { - kernel_log(ifr); - break; - } - - if (errno != EEXIST) { - err("error changing net interface name %s to %s: %s\n", - ifr.ifr_name, ifr.ifr_newname, strerror(errno)); - break; - } - dbg("wait for netif '%s' to become free, loop=%i\n", udev->name, (30 * 20) - loop); - usleep(1000 * 1000 / 20); - } - } - -exit: - close(sk); - return retval; -} - -int udev_device_event(struct udev_rules *rules, struct udevice *udev) -{ - int retval = 0; - - if (udev->devpath_old != NULL) - if (udev_db_rename(udev->devpath_old, udev->dev->devpath) == 0) - info("moved database from '%s' to '%s'\n", udev->devpath_old, udev->dev->devpath); - - /* add device node */ - if (major(udev->devt) != 0 && - (strcmp(udev->action, "add") == 0 || strcmp(udev->action, "change") == 0)) { - struct udevice *udev_old; - - dbg("device node add '%s'\n", udev->dev->devpath); - - udev_rules_get_name(rules, udev); - if (udev->ignore_device) { - info("device event will be ignored\n"); - goto exit; - } - if (udev->name[0] == '\0') { - info("device node creation supressed\n"); - goto exit; - } - - /* read current database entry; cleanup, if it is known device */ - udev_old = udev_device_init(NULL); - if (udev_old != NULL) { - udev_old->test_run = udev->test_run; - if (udev_db_get_device(udev_old, udev->dev->devpath) == 0) { - info("device '%s' already in database, cleanup\n", udev->dev->devpath); - udev_db_delete_device(udev_old); - } else { - udev_device_cleanup(udev_old); - udev_old = NULL; - } - } - - /* create node */ - retval = udev_node_add(udev); - if (retval != 0) - goto exit; - - /* store in database */ - udev_db_add_device(udev); - - /* create, replace, delete symlinks according to priority */ - udev_node_update_symlinks(udev, udev_old); - - if (udev_old != NULL) - udev_device_cleanup(udev_old); - goto exit; - } - - /* add netif */ - if (strcmp(udev->dev->subsystem, "net") == 0 && strcmp(udev->action, "add") == 0) { - dbg("netif add '%s'\n", udev->dev->devpath); - udev_rules_get_name(rules, udev); - if (udev->ignore_device) { - info("device event will be ignored\n"); - goto exit; - } - if (udev->name[0] == '\0') { - info("device renaming supressed\n"); - goto exit; - } - - /* look if we want to change the name of the netif */ - if (strcmp(udev->name, udev->dev->kernel) != 0) { - char devpath[PATH_MAX]; - char *pos; - - retval = rename_netif(udev); - if (retval != 0) - goto exit; - info("renamed netif to '%s'\n", udev->name); - - /* export old name */ - setenv("INTERFACE_OLD", udev->dev->kernel, 1); - - /* now change the devpath, because the kernel device name has changed */ - strlcpy(devpath, udev->dev->devpath, sizeof(devpath)); - pos = strrchr(devpath, '/'); - if (pos != NULL) { - pos[1] = '\0'; - strlcat(devpath, udev->name, sizeof(devpath)); - sysfs_device_set_values(udev->dev, devpath, NULL, NULL); - setenv("DEVPATH", udev->dev->devpath, 1); - setenv("INTERFACE", udev->name, 1); - info("changed devpath to '%s'\n", udev->dev->devpath); - } - } - goto exit; - } - - /* remove device node */ - if (major(udev->devt) != 0 && strcmp(udev->action, "remove") == 0) { - struct name_entry *name_loop; - - /* import database entry, and delete it */ - if (udev_db_get_device(udev, udev->dev->devpath) == 0) { - udev_db_delete_device(udev); - /* restore stored persistent data */ - list_for_each_entry(name_loop, &udev->env_list, node) - putenv(name_loop->name); - } else { - dbg("'%s' not found in database, using kernel name '%s'\n", - udev->dev->devpath, udev->dev->kernel); - strlcpy(udev->name, udev->dev->kernel, sizeof(udev->name)); - } - - udev_rules_get_run(rules, udev); - if (udev->ignore_device) { - info("device event will be ignored\n"); - goto exit; - } - - if (udev->ignore_remove) { - info("ignore_remove for '%s'\n", udev->name); - goto exit; - } - /* remove the node */ - retval = udev_node_remove(udev); - - /* delete or restore symlinks according to priority */ - udev_node_update_symlinks(udev, NULL); - goto exit; - } - - /* default devices */ - udev_rules_get_run(rules, udev); - if (udev->ignore_device) - info("device event will be ignored\n"); - -exit: - return retval; -} diff --git a/udev/udev_device_event.c b/udev/udev_device_event.c new file mode 100644 index 00000000..045035d4 --- /dev/null +++ b/udev/udev_device_event.c @@ -0,0 +1,259 @@ +/* + * Copyright (C) 2004-2006 Kay Sievers + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation version 2 of the License. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + * + */ + + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "udev.h" +#include "udev_rules.h" + + +static void kernel_log(struct ifreq ifr) +{ + int klog; + FILE *f; + + klog = open("/dev/kmsg", O_WRONLY); + if (klog < 0) + return; + + f = fdopen(klog, "w"); + if (f == NULL) { + close(klog); + return; + } + + fprintf(f, "<6>udev: renamed network interface %s to %s\n", + ifr.ifr_name, ifr.ifr_newname); + fclose(f); +} + +static int rename_netif(struct udevice *udev) +{ + int sk; + struct ifreq ifr; + int retval; + + info("changing net interface name from '%s' to '%s'\n", udev->dev->kernel, udev->name); + if (udev->test_run) + return 0; + + sk = socket(PF_INET, SOCK_DGRAM, 0); + if (sk < 0) { + err("error opening socket: %s\n", strerror(errno)); + return -1; + } + + memset(&ifr, 0x00, sizeof(struct ifreq)); + strlcpy(ifr.ifr_name, udev->dev->kernel, IFNAMSIZ); + strlcpy(ifr.ifr_newname, udev->name, IFNAMSIZ); + retval = ioctl(sk, SIOCSIFNAME, &ifr); + if (retval == 0) + kernel_log(ifr); + else { + int loop; + + /* see if the destination interface name already exists */ + if (errno != EEXIST) { + err("error changing netif name %s to %s: %s\n", ifr.ifr_name, ifr.ifr_newname, strerror(errno)); + goto exit; + } + + /* free our own name, another process may wait for us */ + strlcpy(ifr.ifr_newname, udev->dev->kernel, IFNAMSIZ); + strlcat(ifr.ifr_newname, "_rename", IFNAMSIZ); + retval = ioctl(sk, SIOCSIFNAME, &ifr); + if (retval != 0) { + err("error changing netif name %s to %s: %s\n", ifr.ifr_name, ifr.ifr_newname, strerror(errno)); + goto exit; + } + + /* wait 30 seconds for our target to become available */ + strlcpy(ifr.ifr_name, ifr.ifr_newname, IFNAMSIZ); + strlcpy(ifr.ifr_newname, udev->name, IFNAMSIZ); + loop = 30 * 20; + while (loop--) { + retval = ioctl(sk, SIOCSIFNAME, &ifr); + if (retval == 0) { + kernel_log(ifr); + break; + } + + if (errno != EEXIST) { + err("error changing net interface name %s to %s: %s\n", + ifr.ifr_name, ifr.ifr_newname, strerror(errno)); + break; + } + dbg("wait for netif '%s' to become free, loop=%i\n", udev->name, (30 * 20) - loop); + usleep(1000 * 1000 / 20); + } + } + +exit: + close(sk); + return retval; +} + +int udev_device_event(struct udev_rules *rules, struct udevice *udev) +{ + int retval = 0; + + if (udev->devpath_old != NULL) + if (udev_db_rename(udev->devpath_old, udev->dev->devpath) == 0) + info("moved database from '%s' to '%s'\n", udev->devpath_old, udev->dev->devpath); + + /* add device node */ + if (major(udev->devt) != 0 && + (strcmp(udev->action, "add") == 0 || strcmp(udev->action, "change") == 0)) { + struct udevice *udev_old; + + dbg("device node add '%s'\n", udev->dev->devpath); + + udev_rules_get_name(rules, udev); + if (udev->ignore_device) { + info("device event will be ignored\n"); + goto exit; + } + if (udev->name[0] == '\0') { + info("device node creation supressed\n"); + goto exit; + } + + /* read current database entry; cleanup, if it is known device */ + udev_old = udev_device_init(NULL); + if (udev_old != NULL) { + udev_old->test_run = udev->test_run; + if (udev_db_get_device(udev_old, udev->dev->devpath) == 0) { + info("device '%s' already in database, cleanup\n", udev->dev->devpath); + udev_db_delete_device(udev_old); + } else { + udev_device_cleanup(udev_old); + udev_old = NULL; + } + } + + /* create node */ + retval = udev_node_add(udev); + if (retval != 0) + goto exit; + + /* store in database */ + udev_db_add_device(udev); + + /* create, replace, delete symlinks according to priority */ + udev_node_update_symlinks(udev, udev_old); + + if (udev_old != NULL) + udev_device_cleanup(udev_old); + goto exit; + } + + /* add netif */ + if (strcmp(udev->dev->subsystem, "net") == 0 && strcmp(udev->action, "add") == 0) { + dbg("netif add '%s'\n", udev->dev->devpath); + udev_rules_get_name(rules, udev); + if (udev->ignore_device) { + info("device event will be ignored\n"); + goto exit; + } + if (udev->name[0] == '\0') { + info("device renaming supressed\n"); + goto exit; + } + + /* look if we want to change the name of the netif */ + if (strcmp(udev->name, udev->dev->kernel) != 0) { + char devpath[PATH_MAX]; + char *pos; + + retval = rename_netif(udev); + if (retval != 0) + goto exit; + info("renamed netif to '%s'\n", udev->name); + + /* export old name */ + setenv("INTERFACE_OLD", udev->dev->kernel, 1); + + /* now change the devpath, because the kernel device name has changed */ + strlcpy(devpath, udev->dev->devpath, sizeof(devpath)); + pos = strrchr(devpath, '/'); + if (pos != NULL) { + pos[1] = '\0'; + strlcat(devpath, udev->name, sizeof(devpath)); + sysfs_device_set_values(udev->dev, devpath, NULL, NULL); + setenv("DEVPATH", udev->dev->devpath, 1); + setenv("INTERFACE", udev->name, 1); + info("changed devpath to '%s'\n", udev->dev->devpath); + } + } + goto exit; + } + + /* remove device node */ + if (major(udev->devt) != 0 && strcmp(udev->action, "remove") == 0) { + struct name_entry *name_loop; + + /* import database entry, and delete it */ + if (udev_db_get_device(udev, udev->dev->devpath) == 0) { + udev_db_delete_device(udev); + /* restore stored persistent data */ + list_for_each_entry(name_loop, &udev->env_list, node) + putenv(name_loop->name); + } else { + dbg("'%s' not found in database, using kernel name '%s'\n", + udev->dev->devpath, udev->dev->kernel); + strlcpy(udev->name, udev->dev->kernel, sizeof(udev->name)); + } + + udev_rules_get_run(rules, udev); + if (udev->ignore_device) { + info("device event will be ignored\n"); + goto exit; + } + + if (udev->ignore_remove) { + info("ignore_remove for '%s'\n", udev->name); + goto exit; + } + /* remove the node */ + retval = udev_node_remove(udev); + + /* delete or restore symlinks according to priority */ + udev_node_update_symlinks(udev, NULL); + goto exit; + } + + /* default devices */ + udev_rules_get_run(rules, udev); + if (udev->ignore_device) + info("device event will be ignored\n"); + +exit: + return retval; +} -- 2.39.5