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Linux/Documentation/ABI/testing/sysfs-class-rtrs-client

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Diff markup

Differences between /Documentation/ABI/testing/sysfs-class-rtrs-client (Architecture ppc) and /Documentation/ABI/testing/sysfs-class-rtrs-client (Architecture m68k)


  1 What:           /sys/class/rtrs-client              1 What:           /sys/class/rtrs-client
  2 Date:           Feb 2020                            2 Date:           Feb 2020
  3 KernelVersion:  5.7                                 3 KernelVersion:  5.7
  4 Contact:        Jack Wang <jinpu.wang@cloud.ion      4 Contact:        Jack Wang <jinpu.wang@cloud.ionos.com> Danil Kipnis <danil.kipnis@cloud.ionos.com>
  5 Description:    When a user of RTRS API create      5 Description:    When a user of RTRS API creates a new session, a directory entry with
  6                 the name of that session is cr      6                 the name of that session is created under /sys/class/rtrs-client/<session-name>/
  7                                                     7 
  8 What:           /sys/class/rtrs-client/<sessio      8 What:           /sys/class/rtrs-client/<session-name>/add_path
  9 Date:           Feb 2020                            9 Date:           Feb 2020
 10 KernelVersion:  5.7                                10 KernelVersion:  5.7
 11 Contact:        Jack Wang <jinpu.wang@cloud.ion     11 Contact:        Jack Wang <jinpu.wang@cloud.ionos.com> Danil Kipnis <danil.kipnis@cloud.ionos.com>
 12 Description:    RW, adds a new path (connectio     12 Description:    RW, adds a new path (connection) to an existing session. Expected format is the
 13                 following::                        13                 following::
 14                                                    14 
 15                     <[source addr,]destination     15                     <[source addr,]destination addr>
 16                     *addr ::= [ ip:<ipv4|ipv6>     16                     *addr ::= [ ip:<ipv4|ipv6> | gid:<gid> ]
 17                                                    17 
 18 What:           /sys/class/rtrs-client/<sessio     18 What:           /sys/class/rtrs-client/<session-name>/max_reconnect_attempts
 19 Date:           Feb 2020                           19 Date:           Feb 2020
 20 KernelVersion:  5.7                                20 KernelVersion:  5.7
 21 Contact:        Jack Wang <jinpu.wang@cloud.ion     21 Contact:        Jack Wang <jinpu.wang@cloud.ionos.com> Danil Kipnis <danil.kipnis@cloud.ionos.com>
 22 Description:    Maximum number reconnect attem     22 Description:    Maximum number reconnect attempts the client should make before giving up
 23                 after connection breaks unexpe     23                 after connection breaks unexpectedly.
 24                                                    24 
 25 What:           /sys/class/rtrs-client/<sessio     25 What:           /sys/class/rtrs-client/<session-name>/mp_policy
 26 Date:           Feb 2020                           26 Date:           Feb 2020
 27 KernelVersion:  5.7                                27 KernelVersion:  5.7
 28 Contact:        Jack Wang <jinpu.wang@cloud.ion     28 Contact:        Jack Wang <jinpu.wang@cloud.ionos.com> Danil Kipnis <danil.kipnis@cloud.ionos.com>
 29 Description:    Multipath policy specifies whi     29 Description:    Multipath policy specifies which path should be selected on each IO:
 30                                                    30 
 31                 round-robin (0):                   31                 round-robin (0):
 32                     select path in per CPU rou     32                     select path in per CPU round-robin manner.
 33                                                    33 
 34                 min-inflight (1):                  34                 min-inflight (1):
 35                     select path with minimum i     35                     select path with minimum inflights.
 36                                                    36 
 37                 min-latency (2):                   37                 min-latency (2):
 38                     select path with minimum l     38                     select path with minimum latency.
 39                                                    39 
 40 What:           /sys/class/rtrs-client/<sessio     40 What:           /sys/class/rtrs-client/<session-name>/paths/
 41 Date:           Feb 2020                           41 Date:           Feb 2020
 42 KernelVersion:  5.7                                42 KernelVersion:  5.7
 43 Contact:        Jack Wang <jinpu.wang@cloud.ion     43 Contact:        Jack Wang <jinpu.wang@cloud.ionos.com> Danil Kipnis <danil.kipnis@cloud.ionos.com>
 44 Description:    Each path belonging to a given     44 Description:    Each path belonging to a given session is listed here by its source and
 45                 destination address. When a ne     45                 destination address. When a new path is added to a session by writing to
 46                 the "add_path" entry, a direct<     46                 the "add_path" entry, a directory <src@dst> is created.
 47                                                    47 
 48 What:           /sys/class/rtrs-client/<session     48 What:           /sys/class/rtrs-client/<session-name>/paths/<src@dst>/state
 49 Date:           Feb 2020                           49 Date:           Feb 2020
 50 KernelVersion:  5.7                                50 KernelVersion:  5.7
 51 Contact:        Jack Wang <jinpu.wang@cloud.ion     51 Contact:        Jack Wang <jinpu.wang@cloud.ionos.com> Danil Kipnis <danil.kipnis@cloud.ionos.com>
 52 Description:    RO, Contains "connected" if th     52 Description:    RO, Contains "connected" if the session is connected to the peer and fully
 53                 functional.  Otherwise the fil     53                 functional.  Otherwise the file contains "disconnected"
 54                                                    54 
 55 What:           /sys/class/rtrs-client/<session     55 What:           /sys/class/rtrs-client/<session-name>/paths/<src@dst>/reconnect
 56 Date:           Feb 2020                           56 Date:           Feb 2020
 57 KernelVersion:  5.7                                57 KernelVersion:  5.7
 58 Contact:        Jack Wang <jinpu.wang@cloud.ion     58 Contact:        Jack Wang <jinpu.wang@cloud.ionos.com> Danil Kipnis <danil.kipnis@cloud.ionos.com>
 59 Description:    Write "1" to the file in order     59 Description:    Write "1" to the file in order to reconnect the path.
 60                 Operation is blocking and retu     60                 Operation is blocking and returns 0 if reconnect was successful.
 61                                                    61 
 62 What:           /sys/class/rtrs-client/<session     62 What:           /sys/class/rtrs-client/<session-name>/paths/<src@dst>/disconnect
 63 Date:           Feb 2020                           63 Date:           Feb 2020
 64 KernelVersion:  5.7                                64 KernelVersion:  5.7
 65 Contact:        Jack Wang <jinpu.wang@cloud.ion     65 Contact:        Jack Wang <jinpu.wang@cloud.ionos.com> Danil Kipnis <danil.kipnis@cloud.ionos.com>
 66 Description:    Write "1" to the file in order     66 Description:    Write "1" to the file in order to disconnect the path.
 67                 Operation blocks until RTRS pa     67                 Operation blocks until RTRS path is disconnected.
 68                                                    68 
 69 What:           /sys/class/rtrs-client/<session     69 What:           /sys/class/rtrs-client/<session-name>/paths/<src@dst>/remove_path
 70 Date:           Feb 2020                           70 Date:           Feb 2020
 71 KernelVersion:  5.7                                71 KernelVersion:  5.7
 72 Contact:        Jack Wang <jinpu.wang@cloud.ion     72 Contact:        Jack Wang <jinpu.wang@cloud.ionos.com> Danil Kipnis <danil.kipnis@cloud.ionos.com>
 73 Description:    Write "1" to the file in order     73 Description:    Write "1" to the file in order to disconnected and remove the path
 74                 from the session.  Operation b     74                 from the session.  Operation blocks until the path is disconnected
 75                 and removed from the session.      75                 and removed from the session.
 76                                                    76 
 77 What:           /sys/class/rtrs-client/<session     77 What:           /sys/class/rtrs-client/<session-name>/paths/<src@dst>/hca_name
 78 Date:           Feb 2020                           78 Date:           Feb 2020
 79 KernelVersion:  5.7                                79 KernelVersion:  5.7
 80 Contact:        Jack Wang <jinpu.wang@cloud.ion     80 Contact:        Jack Wang <jinpu.wang@cloud.ionos.com> Danil Kipnis <danil.kipnis@cloud.ionos.com>
 81 Description:    RO, Contains the name of HCA t     81 Description:    RO, Contains the name of HCA the connection established on.
 82                                                    82 
 83 What:           /sys/class/rtrs-client/<session     83 What:           /sys/class/rtrs-client/<session-name>/paths/<src@dst>/hca_port
 84 Date:           Feb 2020                           84 Date:           Feb 2020
 85 KernelVersion:  5.7                                85 KernelVersion:  5.7
 86 Contact:        Jack Wang <jinpu.wang@cloud.ion     86 Contact:        Jack Wang <jinpu.wang@cloud.ionos.com> Danil Kipnis <danil.kipnis@cloud.ionos.com>
 87 Description:    RO, Contains the port number o     87 Description:    RO, Contains the port number of active port traffic is going through.
 88                                                    88 
 89 What:           /sys/class/rtrs-client/<session     89 What:           /sys/class/rtrs-client/<session-name>/paths/<src@dst>/src_addr
 90 Date:           Feb 2020                           90 Date:           Feb 2020
 91 KernelVersion:  5.7                                91 KernelVersion:  5.7
 92 Contact:        Jack Wang <jinpu.wang@cloud.ion     92 Contact:        Jack Wang <jinpu.wang@cloud.ionos.com> Danil Kipnis <danil.kipnis@cloud.ionos.com>
 93 Description:    RO, Contains the source addres     93 Description:    RO, Contains the source address of the path
 94                                                    94 
 95 What:           /sys/class/rtrs-client/<session     95 What:           /sys/class/rtrs-client/<session-name>/paths/<src@dst>/dst_addr
 96 Date:           Feb 2020                           96 Date:           Feb 2020
 97 KernelVersion:  5.7                                97 KernelVersion:  5.7
 98 Contact:        Jack Wang <jinpu.wang@cloud.ion     98 Contact:        Jack Wang <jinpu.wang@cloud.ionos.com> Danil Kipnis <danil.kipnis@cloud.ionos.com>
 99 Description:    RO, Contains the destination a     99 Description:    RO, Contains the destination address of the path
100                                                   100 
101 What:           /sys/class/rtrs-client/<session    101 What:           /sys/class/rtrs-client/<session-name>/paths/<src@dst>/cur_latency
102 Date:           Feb 2020                          102 Date:           Feb 2020
103 KernelVersion:  5.7                               103 KernelVersion:  5.7
104 Contact:        Jack Wang <jinpu.wang@cloud.ion    104 Contact:        Jack Wang <jinpu.wang@cloud.ionos.com> Danil Kipnis <danil.kipnis@cloud.ionos.com>
105 Description:    RO, Contains the latency time     105 Description:    RO, Contains the latency time calculated by the heart-beat messages.
106                 Whenever the client sends hear    106                 Whenever the client sends heart-beat message, it checks the time gap
107                 between sending the heart-beat    107                 between sending the heart-beat message and receiving the ACK.
108                 This value can be changed regu    108                 This value can be changed regularly.
109                                                   109 
110 What:           /sys/class/rtrs-client/<session    110 What:           /sys/class/rtrs-client/<session-name>/paths/<src@dst>/stats/reset_all
111 Date:           Feb 2020                          111 Date:           Feb 2020
112 KernelVersion:  5.7                               112 KernelVersion:  5.7
113 Contact:        Jack Wang <jinpu.wang@cloud.ion    113 Contact:        Jack Wang <jinpu.wang@cloud.ionos.com> Danil Kipnis <danil.kipnis@cloud.ionos.com>
114 Description:    RW, Read will return usage hel    114 Description:    RW, Read will return usage help, write 0 will clear all the statistics.
115                                                   115 
116 What:           /sys/class/rtrs-client/<session    116 What:           /sys/class/rtrs-client/<session-name>/paths/<src@dst>/stats/cpu_migration
117 Date:           Feb 2020                          117 Date:           Feb 2020
118 KernelVersion:  5.7                               118 KernelVersion:  5.7
119 Contact:        Jack Wang <jinpu.wang@cloud.ion    119 Contact:        Jack Wang <jinpu.wang@cloud.ionos.com> Danil Kipnis <danil.kipnis@cloud.ionos.com>
120 Description:    RTRS expects that each HCA IRQ    120 Description:    RTRS expects that each HCA IRQ is pinned to a separate CPU. If it's
121                 not the case, the processing o    121                 not the case, the processing of an I/O response could be processed on a
122                 different CPU than where it wa    122                 different CPU than where it was originally submitted.  This file shows
123                 how many interrupts where gene    123                 how many interrupts where generated on a non expected CPU.
124                                                   124 
125                 "from:"                           125                 "from:"
126                     is the CPU on which the IR    126                     is the CPU on which the IRQ was expected, but not generated.
127                 "to:"                             127                 "to:"
128                     is the CPU on which the IR    128                     is the CPU on which the IRQ was generated, but not expected.
129                                                   129 
130 What:           /sys/class/rtrs-client/<session    130 What:           /sys/class/rtrs-client/<session-name>/paths/<src@dst>/stats/reconnects
131 Date:           Feb 2020                          131 Date:           Feb 2020
132 KernelVersion:  5.7                               132 KernelVersion:  5.7
133 Contact:        Jack Wang <jinpu.wang@cloud.ion    133 Contact:        Jack Wang <jinpu.wang@cloud.ionos.com> Danil Kipnis <danil.kipnis@cloud.ionos.com>
134 Description:    Contains 2 unsigned int values    134 Description:    Contains 2 unsigned int values, the first one records number of successful
135                 reconnects in the path lifetim    135                 reconnects in the path lifetime, the second one records number of failed
136                 reconnects in the path lifetim    136                 reconnects in the path lifetime.
137                                                   137 
138 What:           /sys/class/rtrs-client/<session    138 What:           /sys/class/rtrs-client/<session-name>/paths/<src@dst>/stats/rdma
139 Date:           Feb 2020                          139 Date:           Feb 2020
140 KernelVersion:  5.7                               140 KernelVersion:  5.7
141 Contact:        Jack Wang <jinpu.wang@cloud.ion    141 Contact:        Jack Wang <jinpu.wang@cloud.ionos.com> Danil Kipnis <danil.kipnis@cloud.ionos.com>
142 Description:    Contains statistics regarding     142 Description:    Contains statistics regarding rdma operations and inflight operations.
143                 The output consists of 6 value    143                 The output consists of 6 values::
144                                                   144 
145                     <read-count> <read-total-s    145                     <read-count> <read-total-size> <write-count> \
146                     <write-total-size> <inflig    146                     <write-total-size> <inflights> <failovered>
                                                      

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