1SRP_DAEMON(8) USER COMMANDS SRP_DAEMON(8)
2
6 srp_daemon - Discovers SRP targets in an InfiniBand Fabric
7
10 srp_daemon [-vVcaeon] [-d umad-device | -i infiniband-device [-p port-
11 num] | -j dev:port] [-t timeout(ms)] [-r retries] [-R rescan-time] [-f
12 rules-file]
13
17 Discovers and connects to InfiniBand SCSI RDMA Protocol (SRP) targets
18 in an IB fabric.
19 Each srp_daemon instance operates on one local port. Upon boot it per‐
21 forms a full rescan of the fabric and then waits for an srp_daemon
22 event. An srp_daemon event can be a join of a new machine to the fab‐
23 ric, a change in the capabilities of a machine, an SA change, or an
24 expiration of a predefined timeout.
25 When a new machine joins the fabric, srp_daemon checks if it is an SRP
27 target. When there is a change of capabilities, srp_daemon checks if
28 the machine has turned into an SRP target. When there is an SA change
29 or a timeout expiration, srp_daemon performs a full rescan of the fab‐
30 ric.
31 For each target srp_daemon finds, it checks if it should connect to
33 this target according to its rules (the default rules file is
34 /etc/srp_daemon.conf) and if it is already connected to the local port.
35 If it should connect to this target and if it is not connected yet,
36 srp_daemon can either print the target details or connect to it.
37
40 -v Print more verbose output
41 -V Print even more verbose output (debug mode)
43 -i infiniband-device
45 Work on infiniband-device. This option should not be used with
46 -d nor with -j.
47 -p port-num
49 Work on port port-num (default 1). This option must be used with
50 -i and should not be used with -d nor with -j.
51 -j dev:port
53 Work on port number port of InfiniBand device dev. This option
54 should not be used with -d, -i nor with -p.
55 -d umad-device
57 Use device file umad-device (default /dev/infiniband/umad0) This
58 option should not be used with -i, -p nor with -j.
59 -c Generate output suitable for piping directly to a
61 /sys/class/infiniband_srp/srp-<device>-<port>/add_target file.
62 -a Prints all the targets in the fabric, not only targets that are
64 not connected through the local port. This is the same behavior
65 as that of ibsrpdm.
66 -e Execute the connection command, i.e., make the connection to the
68 target.
69 -o Perform only one rescan and exit just like ibsrpdm.
71 -R rescan-time
73 Force a complete rescan every rescan-time seconds. If -R is not
74 specified, no timeout rescans will be performed.
75 -T retry-timeout
77 Retries to connect to existing target after retry-timeout sec‐
78 onds. If -R is not specified, uses 5 Seconds timeout. if retry-
79 timeout is 0, will not try to reconnect. The reason srp_daemon
80 retries to connect to the target is because there may be a rare
81 scnerio in which srp_daemon will try to connect to add a target
82 when the target is about to be removed, but is not removed yet.
83 -f rules-file
85 Decide to which targets to connect according to the rules in
86 rules-file. If -f is not specified, uses the default rules file
87 /etc/srp_daemon.conf. Each line in the rules-file is a rule
88 which can be either an allow connection or a disallow connection
89 according to the first character in the line (a or d accord‐
90 ingly). The rest of the line is values for id_ext, ioc_guid,
91 dgid, service_id. Please take a look at the example section for
92 an example of the file. srp_daemon decide whether to allow or
93 disallow each target according to first rule that match the
94 target. If no rule matches the target, the target is allowed and
95 will be connected. In an allow rule it is possible to set
96 attributes for the connection to the target. Supported
97 attributes are max_cmd_per_lun and max_sect.
98 -t timeout
100 Use timeout of timeout msec for MAD responses (default: 5 sec).
101 -r retries
103 Perform retries retries on each send to MAD (default: 3
104 retries).
105 -n New format - use also initiator_ext in the connection command.
107 --systemd
109 Enable systemd integration.
110
113 /etc/srp_daemon.conf - Default rules configuration file that indicates
114 to which targets to connect. Can be overridden using the -f rules-file
115 option. Each line in this file is a rule which can be either an allow
116 connection or a disallow connection according to the first character in
117 the line (a or d accordingly). The rest of the line is values for
118 id_ext, ioc_guid, dgid, service_id. Please take a look at the example
119 section for an example of the file. srp_daemon decide whether to allow
120 or disallow each target according to first rule that match the target.
121 If no rule matches the target, the target is allowed and will be con‐
122 nected. In an allow rule it is possible to set attributes for the con‐
123 nection to the target. Supported attributes are max_cmd_per_lun and
124 max_sect.
125
128 srp_daemon -e -i mthca0 -p 1 -R 60 (Connects to the targets accessible
129 through port 1 of mthca0. Performs a complete rescan every minute)
130 srp_daemon -o -c -a (Prints the connection commands for the
132 targets in the fabric and exits - similar to ibsrpdm)
133 srp_daemon -e -f rules.txt (Connects to the targets allowed in
135 the rules file rules.txt)
136 An example for a rules configuration file (such as /etc/srp_daemon.conf)
138 ------------------------------------------------------------------------
139 # Rules file example
140 # This is a comment
141 # disallow the following dgid
142 d dgid=fe800000000000000002c90200402bd5
143 # allow target with the following ioc_guid
144 a ioc_guid=00a0b80200402bd7
145 # allow target with the following id_ext and ioc_guid. And setting max_cmd_per_lun to 31.
146 a id_ext=200500A0B81146A1,ioc_guid=00a0b80200402bef,max_cmd_per_lun=31
147 # disallow all the rest
148 d
149
153 ibsrpdm(8)
154
157 Roland Dreier
158 <rolandd@cisco.com>
159 Ishai Rabinovitz
161 <ishai@mellanox.co.il>
162OpenFabrics September 5, 2006 SRP_DAEMON(8)