projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 9ce7deff MM |
1 | .. SPDX-License-Identifier: GPL-2.0 |
| 2 | ||
| 3 | ===================== | |
| 4 | MPTCP Sysfs variables | |
| 5 | ===================== | |
| 6 | ||
| 7 | /proc/sys/net/mptcp/* Variables | |
| 8 | =============================== | |
| 9 | ||
| 744ee140 | 10 | enabled - BOOLEAN |
| 9ce7deff MM |
11 | Control whether MPTCP sockets can be created. |
| 12 | ||
| 744ee140 MB |
13 | MPTCP sockets can be created if the value is 1. This is a |
| 14 | per-namespace sysctl. | |
| 9ce7deff | 15 | |
| 744ee140 | 16 | Default: 1 (enabled) |
| 9ce7deff MM |
17 | |
| 18 | add_addr_timeout - INTEGER (seconds) | |
| 19 | Set the timeout after which an ADD_ADDR control message will be | |
| 20 | resent to an MPTCP peer that has not acknowledged a previous | |
| 21 | ADD_ADDR message. | |
| 22 | ||
| 23 | The default value matches TCP_RTO_MAX. This is a per-namespace | |
| 24 | sysctl. | |
| 25 | ||
| 26 | Default: 120 | |
| fc3c82ee | 27 | |
| d866ae9a PA |
28 | close_timeout - INTEGER (seconds) |
| 29 | Set the make-after-break timeout: in absence of any close or | |
| 30 | shutdown syscall, MPTCP sockets will maintain the status | |
| 31 | unchanged for such time, after the last subflow removal, before | |
| 32 | moving to TCP_CLOSE. | |
| 33 | ||
| 34 | The default value matches TCP_TIMEWAIT_LEN. This is a per-namespace | |
| 35 | sysctl. | |
| 36 | ||
| 37 | Default: 60 | |
| 38 | ||
| fc3c82ee GT |
39 | checksum_enabled - BOOLEAN |
| 40 | Control whether DSS checksum can be enabled. | |
| 41 | ||
| 42 | DSS checksum can be enabled if the value is nonzero. This is a | |
| 43 | per-namespace sysctl. | |
| 44 | ||
| 45 | Default: 0 | |
| d2f77960 GT |
46 | |
| 47 | allow_join_initial_addr_port - BOOLEAN | |
| 48 | Allow peers to send join requests to the IP address and port number used | |
| 49 | by the initial subflow if the value is 1. This controls a flag that is | |
| 50 | sent to the peer at connection time, and whether such join requests are | |
| 51 | accepted or denied. | |
| 52 | ||
| 53 | Joins to addresses advertised with ADD_ADDR are not affected by this | |
| 54 | value. | |
| 55 | ||
| 56 | This is a per-namespace sysctl. | |
| 57 | ||
| 58 | Default: 1 | |
| ff5a0b42 | 59 | |
| 6bb63ccc | 60 | pm_type - INTEGER |
| 6bb63ccc MM |
61 | Set the default path manager type to use for each new MPTCP |
| 62 | socket. In-kernel path management will control subflow | |
| 63 | connections and address advertisements according to | |
| 64 | per-namespace values configured over the MPTCP netlink | |
| 65 | API. Userspace path management puts per-MPTCP-connection subflow | |
| 66 | connection decisions and address advertisements under control of | |
| 67 | a privileged userspace program, at the cost of more netlink | |
| 68 | traffic to propagate all of the related events and commands. | |
| 69 | ||
| 70 | This is a per-namespace sysctl. | |
| 71 | ||
| 72 | * 0 - In-kernel path manager | |
| 73 | * 1 - Userspace path manager | |
| 74 | ||
| 75 | Default: 0 | |
| 76 | ||
| ff5a0b42 PA |
77 | stale_loss_cnt - INTEGER |
| 78 | The number of MPTCP-level retransmission intervals with no traffic and | |
| 79 | pending outstanding data on a given subflow required to declare it stale. | |
| 80 | The packet scheduler ignores stale subflows. | |
| 81 | A low stale_loss_cnt value allows for fast active-backup switch-over, | |
| 82 | an high value maximize links utilization on edge scenarios e.g. lossy | |
| 83 | link with high BER or peer pausing the data processing. | |
| 84 | ||
| 85 | This is a per-namespace sysctl. | |
| 86 | ||
| 87 | Default: 4 | |
| e3b2870b GT |
88 | |
| 89 | scheduler - STRING | |
| 90 | Select the scheduler of your choice. | |
| 91 | ||
| 92 | Support for selection of different schedulers. This is a per-namespace | |
| 93 | sysctl. | |
| 94 | ||
| 95 | Default: "default" |