1 What: /sys/class/rnbd-client
2 Date: Feb 2020
3 KernelVersion: 5.7
4 Contact: Jack Wang <jinpu.wang@cloud.ion
5 Description: Provide information about RNBD
6 All sysfs files that are not r
7
8 Example::
9
10 # cat /sys/class/rnbd-clie
11
12 > Usage: echo "sessname=<n
13 > [path=<[srcaddr,]dstaddr
14 > [access_mode=<ro|rw|migr
15 >
16 > addr ::= [ ip:<ipv4> | i
17
18 What: /sys/class/rnbd-client/ctl/map
19 Date: Feb 2020
20 KernelVersion: 5.7
21 Contact: Jack Wang <jinpu.wang@cloud.ion
22 Description: Expected format is the followi
23
24 sessname=<name of the rtrs
25 path=<[srcaddr,]dstaddr> [
26 device_path=<full path on
27 [access_mode=<ro|rw|migrat
28
29 Where:
30
31 sessname:
32 accepts a string not bigge
33 a given session on the cli
34 I.e. "clt_hostname-srv_hos
35
36 path:
37 describes a connection bet
38 specifying destination and
39 The addresses are to be pr
40
41 ip:<IPv6>
42 ip:<IPv4>
43 gid:<GID>
44
45 for example::
46
47 path=ip:10.0.0.66
48
49 The single addr is treated as
50 The connection will be establi
51
52 ::
53
54 path=ip:10.0.0.66,ip:10.0.
55
56 First addr is the source addre
57
58 If multiple "path=" options ar
59 will be established and data w
60 the selected multipath policy
61
62 device_path:
63 Path to the block device o
64 relative to the directory
65 'dev_search_path' module p
66 The rnbd_server prepends t
67 with <dev_search_path> and
68 <dev_search_path>/<device_
69 a /dev/rnbd<N> device file
70 directory and an entry in
71 will be created.
72
73 If 'dev_search_path' contains
74 have different devices namespa
75 the following parameter "dev_s
76 client has this string "sessna
77 will try to open: /run/rnbd-de
78
79 access_mode:
80 the access_mode parameter
81 mapped as "ro" read-only o
82 a device to be exported in
83 access mode has to be spec
84 mode is desired.
85
86 By default "rw" is used.
87
88 nr_poll_queues
89 specifies the number of poll
90 the block-layer will send th
91 For fast network and device
92 IO handling because it saves
93 another process, handling th
94 issuing process.
95
96 Set -1 if you want to set it
97 By default rnbd client creat
98
99 NOTICE: MUST make a unique s
100
101 Exit Codes:
102
103 If the device is already mappe
104 has an invalid format it will
105 be found on the server, it wil
106
107 Finding device file after mapp
108 ------------------------------
109
110 After mapping, the device file
111 o The symlink /sys/class/rnbd<
112 points to /sys/block/<dev-name
113 is the same as the device name
114 path the path to the device /d
115
116 * /dev/block/$(cat /sys/class/<
117
118 How to find the <device_id> of
119 section.
120
121 What: /sys/class/rnbd-client/ctl/dev
122 Date: Feb 2020
123 KernelVersion: 5.7
124 Contact: Jack Wang <jinpu.wang@cloud.ion
125 Description: For each device mapped on the
126 /sys/class/rnbd-client/ctl/dev<
127 to the block device created by
128 The <device_id> of each device
129
130 - If the 'device_path' provide
131 they are replaced by exclama
132 <device_id>. Otherwise, the
133 "device_path" provided.
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