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Linux 6.18.37 · ABI / testing

Device link class sysfs ABI

Supplier와 consumer 사이 device link의 identity, 자동 제거, runtime PM, bind 상태와 boot 후 state 동기화 범위를 설명합니다.

Source pathDocumentation/ABI/testing/sysfs-class-devlink
Source versionLinux v6.18.37
TranslationDUJINLABS 전문 번역 + 해설

요약·해설과 원문, 전문 번역을 서로 분리했습니다. API 이름, symbol, source path는 원문 표기를 사용합니다.

1. 요약·해설

원문의 핵심 논리와 kernel programming 관점의 보충 설명입니다. 아래의 전문 번역과는 별도로 작성했습니다.

2. 영어 원문 전체

번역 기준이 된 Linux v6.18.37 원문입니다. 줄 번호는 이 버전의 파일 좌표입니다.

원문 전체 펼치기
1 What: /sys/class/devlink/.../
2 Date: May 2020
3 Contact: Saravana Kannan <[email protected]>
4 Description:
5 Provide a place in sysfs for the device link objects in the
6 kernel at any given time. The name of a device link directory,
7 denoted as ... above, is of the form <supplier>--<consumer>
8 where <supplier> is the supplier bus:device name and <consumer>
9 is the consumer bus:device name.
10
11 What: /sys/class/devlink/.../auto_remove_on
12 Date: May 2020
13 Contact: Saravana Kannan <[email protected]>
14 Description:
15 This file indicates if the device link will ever be
16 automatically removed by the driver core when the consumer and
17 supplier devices themselves are still present.
18
19 This will be one of the following strings:
20
21 - 'consumer unbind'
22 - 'supplier unbind'
23 - 'never'
24
25 'consumer unbind' means the device link will be removed when
26 the consumer's driver is unbound from the consumer device.
27
28 'supplier unbind' means the device link will be removed when
29 the supplier's driver is unbound from the supplier device.
30
31 'never' means the device link will not be automatically removed
32 when as long as the supplier and consumer devices themselves
33 are still present.
34
35 What: /sys/class/devlink/.../consumer
36 Date: May 2020
37 Contact: Saravana Kannan <[email protected]>
38 Description:
39 This file is a symlink to the consumer device's sysfs directory.
40
41 What: /sys/class/devlink/.../runtime_pm
42 Date: May 2020
43 Contact: Saravana Kannan <[email protected]>
44 Description:
45 This file indicates if the device link has any impact on the
46 runtime power management behavior of the consumer and supplier
47 devices. For example: Making sure the supplier doesn't enter
48 runtime suspend while the consumer is active.
49
50 This will be one of the following strings:
51
52 === ========================================
53 '0' Does not affect runtime power management
54 '1' Affects runtime power management
55 === ========================================
56
57 What: /sys/class/devlink/.../status
58 Date: May 2020
59 Contact: Saravana Kannan <[email protected]>
60 Description:
61 This file indicates the status of the device link. The status
62 of a device link is affected by whether the supplier and
63 consumer devices have been bound to their corresponding
64 drivers. The status of a device link also affects the binding
65 and unbinding of the supplier and consumer devices with their
66 drivers and also affects whether the software state of the
67 supplier device is synced with the hardware state of the
68 supplier device after boot up.
69 See also: sysfs-devices-state_synced.
70
71 This will be one of the following strings:
72
73 - 'not tracked'
74 - 'dormant'
75 - 'available'
76 - 'consumer probing'
77 - 'active'
78 - 'supplier unbinding'
79 - 'unknown'
80
81 'not tracked' means this device link does not track the status
82 and has no impact on the binding, unbinding and syncing the
83 hardware and software device state.
84
85 'dormant' means the supplier and the consumer devices have not
86 bound to their driver.
87
88 'available' means the supplier has bound to its driver and is
89 available to supply resources to the consumer device.
90
91 'consumer probing' means the consumer device is currently
92 trying to bind to its driver.
93
94 'active' means the supplier and consumer devices have both
95 bound successfully to their drivers.
96
97 'supplier unbinding' means the supplier devices is currently in
98 the process of unbinding from its driver.
99
100 'unknown' means the state of the device link is not any of the
101 above. If this is ever the value, there's a bug in the kernel.
102
103 What: /sys/class/devlink/.../supplier
104 Date: May 2020
105 Contact: Saravana Kannan <[email protected]>
106 Description:
107 This file is a symlink to the supplier device's sysfs directory.
108
109 What: /sys/class/devlink/.../sync_state_only
110 Date: May 2020
111 Contact: Saravana Kannan <[email protected]>
112 Description:
113 This file indicates if the device link is limited to only
114 affecting the syncing of the hardware and software state of the
115 supplier device.
116
117 This will be one of the following strings:
118
119 === ================================
120 '0'
121 '1' Affects runtime power management
122 === ================================
123
124 '0' means the device link can affect other device behaviors
125 like binding/unbinding, suspend/resume, runtime power
126 management, etc.
127
128 '1' means the device link will only affect the syncing of
129 hardware and software state of the supplier device after boot
130 up and doesn't not affect other behaviors of the devices.
131

3. 한국어 전문 번역

영어 원문의 문단 순서와 의미를 유지한 전체 번역입니다. 코드, 함수명, symbol과 URL은 원문 표기를 유지합니다.