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98 lines
3.1 KiB
C
98 lines
3.1 KiB
C
/* Unified device manager for Finit - uevent handling, device nodes, symlinks
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*
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* Copyright (c) 2021-2025 Joachim Wiberg <troglobit@gmail.com>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#ifndef FINIT_KEVENTD_H_
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#define FINIT_KEVENTD_H_
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#ifdef _LIBITE_LITE
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# include <libite/queue.h> /* BSD sys/queue.h API */
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#else
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# include <lite/queue.h> /* BSD sys/queue.h API */
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#endif
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#include <sys/types.h>
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/* Maximum uevent buffer size (kernel uses 8192 internally) */
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#define UEVENT_BUFFER_SIZE 8192
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/* Uevent actions from kernel */
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typedef enum {
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ACT_UNKNOWN = 0,
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ACT_ADD,
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ACT_REMOVE,
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ACT_CHANGE,
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ACT_MOVE,
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ACT_ONLINE,
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ACT_OFFLINE,
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ACT_BIND,
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ACT_UNBIND,
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} uevent_action_t;
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/*
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* Parsed uevent structure.
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* Pointers are into the receive buffer, zero-copy.
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*/
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struct uevent {
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uevent_action_t action;
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char *devpath; /* /devices/pci0000:00/... */
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char *subsystem; /* block, input, net, power_supply */
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char *devname; /* sda, event0, ttyUSB0 */
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char *devtype; /* disk, partition */
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int major;
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int minor;
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char *modalias; /* module alias for auto-loading */
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char *firmware; /* firmware file name request */
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char *seqnum; /* kernel sequence number */
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char *driver; /* driver name */
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};
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/* Tracked symlink for cleanup on device removal */
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struct dev_symlink {
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TAILQ_ENTRY(dev_symlink) link;
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char *devpath; /* sysfs devpath (key for removal) */
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char *linkpath; /* /dev/disk/by-id/... */
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};
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/* Function prototypes - uevent.c */
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int uevent_parse (char *buf, size_t len, struct uevent *ev);
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const char *uevent_action_str(uevent_action_t action);
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int devnode_add (struct uevent *ev);
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int devnode_del (struct uevent *ev);
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int symlink_add (struct uevent *ev);
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int symlink_del (struct uevent *ev);
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int firmware_load (struct uevent *ev);
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int modprobe_load (const char *modalias);
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int coldplug (void);
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#endif /* FINIT_KEVENTD_H_ */
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/**
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* Local Variables:
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* indent-tabs-mode: t
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* c-file-style: "linux"
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* End:
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*/
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