1What:		/sys/bus/rbd/add
2Date:		Oct, 2010
3KernelVersion:	v2.6.37
4Contact:	Sage Weil <sage@newdream.net>
5Description:
6		(WO) Add rbd block device.
7
8		Usage: <mon ip addr> <options> <pool name> <rbd image name> [<snap name>]
9
10		Example::
11
12		 $ echo "192.168.0.1 name=admin rbd foo" > /sys/bus/rbd/add
13
14		The snapshot name can be "-" or omitted to map the image
15		read/write. A <dev-id> will be assigned for any registered block
16		device. If snapshot is used, it will be mapped read-only.
17
18
19What:		/sys/bus/rbd/remove
20Date:		Oct, 2010
21KernelVersion:	v2.6.37
22Contact:	Sage Weil <sage@newdream.net>
23Description:
24		(WO) Remove rbd block device.
25
26		Usage: <dev-id> [force]
27
28		Example::
29
30		 $ echo 2 > /sys/bus/rbd/remove
31
32		Optional "force" argument which when passed will wait for
33		running requests and then unmap the image. Requests sent to the
34		driver after initiating the removal will be failed. (August
35		2016, since 4.9.)
36
37
38What:		/sys/bus/rbd/add_single_major
39Date:		Dec, 2013
40KernelVersion:	v3.14
41Contact:	Sage Weil <sage@newdream.net>
42Description:
43		(WO) Available only if rbd module is inserted with single_major
44		parameter set to true.
45
46		Usage is the same as for /sys/bus/rbd/add. If present, this
47		should be used instead of the latter: any attempts to use
48		/sys/bus/rbd/add if /sys/bus/rbd/add_single_major is available
49		will fail for backwards compatibility reasons.
50
51
52What:		/sys/bus/rbd/remove_single_major
53Date:		Dec, 2013
54KernelVersion:	v3.14
55Contact:	Sage Weil <sage@newdream.net>
56Description:
57		(WO) Available only if rbd module is inserted with single_major
58		parameter set to true.
59
60		Usage is the same as for /sys/bus/rbd/remove. If present, this
61		should be used instead of the latter: any attempts to use
62		/sys/bus/rbd/remove if /sys/bus/rbd/remove_single_major is
63		available will fail for backwards compatibility reasons.
64
65
66What:		/sys/bus/rbd/supported_features
67Date:		Mar, 2017
68KernelVersion:	v4.11
69Contact:	Sage Weil <sage@newdream.net>
70Description:
71		(RO) Displays the features supported by the rbd module so that
72		userspace can generate meaningful error messages and spell out
73		unsupported features that need to be disabled.
74
75
76What:		/sys/bus/rbd/devices/<dev-id>/size
77What:		/sys/bus/rbd/devices/<dev-id>/major
78What:		/sys/bus/rbd/devices/<dev-id>/client_id
79What:		/sys/bus/rbd/devices/<dev-id>/pool
80What:		/sys/bus/rbd/devices/<dev-id>/name
81What:		/sys/bus/rbd/devices/<dev-id>/refresh
82What:		/sys/bus/rbd/devices/<dev-id>/current_snap
83Date:		Oct, 2010
84KernelVersion:	v2.6.37
85Contact:	Sage Weil <sage@newdream.net>
86Description:
87
88		==============	================================================
89		size		(RO) The size (in bytes) of the mapped block
90				device.
91
92		major		(RO) The block device major number.
93
94		client_id	(RO) The ceph unique client id that was assigned
95				for this specific session.
96
97		pool		(RO) The name of the storage pool where this rbd
98				image resides. An rbd image name is unique
99				within its pool.
100
101		name		(RO) The name of the rbd image.
102
103		refresh		(WO) Writing to this file will reread the image
104				header data and set all relevant data structures
105				accordingly.
106
107		current_snap	(RO) The current snapshot for which the device
108				is mapped.
109		==============	================================================
110
111
112What:		/sys/bus/rbd/devices/<dev-id>/pool_id
113Date:		Jul, 2012
114KernelVersion:	v3.6
115Contact:	Sage Weil <sage@newdream.net>
116Description:
117		(RO) The unique identifier for the rbd image's pool. This is a
118		permanent attribute of the pool. A pool's id will never change.
119
120
121What:		/sys/bus/rbd/devices/<dev-id>/image_id
122What:		/sys/bus/rbd/devices/<dev-id>/features
123Date:		Oct, 2012
124KernelVersion:	v3.7
125Contact:	Sage Weil <sage@newdream.net>
126Description:
127		=========	===============================================
128		image_id	(RO) The unique id for the rbd image. (For rbd
129				image format 1 this is empty.)
130
131		features	(RO) A hexadecimal encoding of the feature bits
132				for this image.
133		=========	===============================================
134
135
136What:		/sys/bus/rbd/devices/<dev-id>/parent
137Date:		Nov, 2012
138KernelVersion:	v3.8
139Contact:	Sage Weil <sage@newdream.net>
140Description:
141		(RO) Information identifying the chain of parent images in a
142		layered rbd image. Entries are separated by empty lines.
143
144
145What:		/sys/bus/rbd/devices/<dev-id>/minor
146Date:		Dec, 2013
147KernelVersion:	v3.14
148Contact:	Sage Weil <sage@newdream.net>
149Description:
150		(RO) The block device minor number.
151
152
153What:		/sys/bus/rbd/devices/<dev-id>/snap_id
154What:		/sys/bus/rbd/devices/<dev-id>/config_info
155What:		/sys/bus/rbd/devices/<dev-id>/cluster_fsid
156What:		/sys/bus/rbd/devices/<dev-id>/client_addr
157Date:		Aug, 2016
158KernelVersion:	v4.9
159Contact:	Sage Weil <sage@newdream.net>
160Description:
161		============	================================================
162		snap_id		(RO) The current snapshot's id.
163
164		config_info	(RO) The string written into
165				/sys/bus/rbd/add{,_single_major}.
166
167		cluster_fsid	(RO) The ceph cluster UUID.
168
169		client_addr	(RO) The ceph unique client
170				entity_addr_t (address + nonce). The format is
171				<address>:<port>/<nonce>: '1.2.3.4:1234/5678' or
172				'[1:2:3:4:5:6:7:8]:1234/5678'.
173		============	================================================
174