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Rules can be precompiled and stored on disk for initramfs, to avoid parsing the rules with every event again and again. Also the OWNER and GROUP names are already resolved to numerical values in the compiled rules. This flag is used for the upcoming move of the rules parsing into udevd: If the real root is mounted udevd is started and parses the rules only once. The event processes will inherit the already parsed rules from the daemon, so we want to ignore any precompiled rules and use the real rules files and watch the filesystem for changes to reload the rules automatically. Signed-off-by: Kay Sievers <kay.sievers@suse.de>
123 lines
2.9 KiB
C
123 lines
2.9 KiB
C
/*
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* udev_rules.h
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*
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* Copyright (C) 2003-2004 Greg Kroah-Hartman <greg@kroah.com>
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* Copyright (C) 2004-2005 Kay Sievers <kay.sievers@vrfy.org>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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*/
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#ifndef UDEV_RULES_H
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#define UDEV_RULES_H
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#include "libsysfs/sysfs/libsysfs.h"
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#include "udev.h"
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#include "list.h"
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#define PAIRS_MAX 5
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#define RULEFILE_SUFFIX ".rules"
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enum key_operation {
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KEY_OP_UNSET,
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KEY_OP_MATCH,
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KEY_OP_NOMATCH,
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KEY_OP_ADD,
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KEY_OP_ASSIGN,
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KEY_OP_ASSIGN_FINAL,
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};
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struct key {
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enum key_operation operation;
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size_t val_off;
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};
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struct key_pair {
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struct key key;
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size_t key_name_off;
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};
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struct key_pairs {
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int count;
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struct key_pair keys[PAIRS_MAX];
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};
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enum import_type {
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IMPORT_UNSET,
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IMPORT_PROGRAM,
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IMPORT_FILE,
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IMPORT_PARENT,
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};
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struct udev_rule {
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struct key label;
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struct key goto_label;
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struct key kernel_name;
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struct key subsystem;
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struct key action;
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struct key devpath;
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struct key bus;
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struct key id;
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struct key driver;
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struct key program;
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struct key result;
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struct key modalias;
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struct key import;
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enum import_type import_type;
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struct key wait_for_sysfs;
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struct key_pairs sysfs;
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struct key_pairs env;
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struct key name;
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struct key symlink;
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struct key run;
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struct key owner;
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struct key group;
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enum key_operation mode_operation;
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mode_t mode;
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unsigned int partitions;
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unsigned int last_rule:1,
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ignore_device:1,
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ignore_remove:1;
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size_t bufsize;
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char buf[];
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};
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struct udev_rules {
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char *buf;
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size_t bufsize;
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size_t current;
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int mapped;
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int resolve_names;
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};
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extern int udev_rules_init(struct udev_rules *rules, int read_compiled, int resolve_names);
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extern void udev_rules_close(struct udev_rules *rules);
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extern void udev_apply_format(struct udevice *udev, char *string, size_t maxsize,
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struct sysfs_class_device *class_dev, struct sysfs_device *sysfs_device);
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extern void udev_rules_iter_init(struct udev_rules *rules);
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extern struct udev_rule *udev_rules_iter_next(struct udev_rules *rules);
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extern struct udev_rule *udev_rules_iter_label(struct udev_rules *rules, const char *label);
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extern int udev_rules_get_name(struct udev_rules *rules, struct udevice *udev,
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struct sysfs_class_device *class_dev);
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extern int udev_rules_get_run(struct udev_rules *rules, struct udevice *udev,
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struct sysfs_class_device *class_dev, struct sysfs_device *sysfs_dev);
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#endif
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