2019-05-19 20:07:45 +08:00
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# SPDX-License-Identifier: GPL-2.0-only
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2009-01-22 16:11:56 +08:00
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config SUNRPC
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tristate
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kernel: conditionally support non-root users, groups and capabilities
There are a lot of embedded systems that run most or all of their
functionality in init, running as root:root. For these systems,
supporting multiple users is not necessary.
This patch adds a new symbol, CONFIG_MULTIUSER, that makes support for
non-root users, non-root groups, and capabilities optional. It is enabled
under CONFIG_EXPERT menu.
When this symbol is not defined, UID and GID are zero in any possible case
and processes always have all capabilities.
The following syscalls are compiled out: setuid, setregid, setgid,
setreuid, setresuid, getresuid, setresgid, getresgid, setgroups,
getgroups, setfsuid, setfsgid, capget, capset.
Also, groups.c is compiled out completely.
In kernel/capability.c, capable function was moved in order to avoid
adding two ifdef blocks.
This change saves about 25 KB on a defconfig build. The most minimal
kernels have total text sizes in the high hundreds of kB rather than
low MB. (The 25k goes down a bit with allnoconfig, but not that much.
The kernel was booted in Qemu. All the common functionalities work.
Adding users/groups is not possible, failing with -ENOSYS.
Bloat-o-meter output:
add/remove: 7/87 grow/shrink: 19/397 up/down: 1675/-26325 (-24650)
[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Iulia Manda <iulia.manda21@gmail.com>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Tested-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Reviewed-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-04-16 07:16:41 +08:00
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depends on MULTIUSER
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2009-01-22 16:11:56 +08:00
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config SUNRPC_GSS
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tristate
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2013-03-17 03:54:52 +08:00
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select OID_REGISTRY
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kernel: conditionally support non-root users, groups and capabilities
There are a lot of embedded systems that run most or all of their
functionality in init, running as root:root. For these systems,
supporting multiple users is not necessary.
This patch adds a new symbol, CONFIG_MULTIUSER, that makes support for
non-root users, non-root groups, and capabilities optional. It is enabled
under CONFIG_EXPERT menu.
When this symbol is not defined, UID and GID are zero in any possible case
and processes always have all capabilities.
The following syscalls are compiled out: setuid, setregid, setgid,
setreuid, setresuid, getresuid, setresgid, getresgid, setgroups,
getgroups, setfsuid, setfsgid, capget, capset.
Also, groups.c is compiled out completely.
In kernel/capability.c, capable function was moved in order to avoid
adding two ifdef blocks.
This change saves about 25 KB on a defconfig build. The most minimal
kernels have total text sizes in the high hundreds of kB rather than
low MB. (The 25k goes down a bit with allnoconfig, but not that much.
The kernel was booted in Qemu. All the common functionalities work.
Adding users/groups is not possible, failing with -ENOSYS.
Bloat-o-meter output:
add/remove: 7/87 grow/shrink: 19/397 up/down: 1675/-26325 (-24650)
[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Iulia Manda <iulia.manda21@gmail.com>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Tested-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Reviewed-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-04-16 07:16:41 +08:00
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depends on MULTIUSER
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2009-01-22 16:11:56 +08:00
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2011-07-14 07:20:49 +08:00
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config SUNRPC_BACKCHANNEL
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bool
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depends on SUNRPC
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2012-08-01 07:45:12 +08:00
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config SUNRPC_SWAP
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bool
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depends on SUNRPC
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2009-01-22 16:11:56 +08:00
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config RPCSEC_GSS_KRB5
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2011-04-16 00:58:56 +08:00
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tristate "Secure RPC: Kerberos V mechanism"
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2010-08-18 05:42:45 +08:00
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depends on SUNRPC && CRYPTO
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2011-04-16 00:58:56 +08:00
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depends on CRYPTO_MD5 && CRYPTO_DES && CRYPTO_CBC && CRYPTO_CTS
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depends on CRYPTO_ECB && CRYPTO_HMAC && CRYPTO_SHA1 && CRYPTO_AES
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depends on CRYPTO_ARC4
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2010-08-18 05:42:45 +08:00
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default y
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2009-01-22 16:11:56 +08:00
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select SUNRPC_GSS
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help
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Choose Y here to enable Secure RPC using the Kerberos version 5
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GSS-API mechanism (RFC 1964).
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Secure RPC calls with Kerberos require an auxiliary user-space
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daemon which may be found in the Linux nfs-utils package
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available from http://linux-nfs.org/. In addition, user-space
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Kerberos support should be installed.
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2010-08-18 05:42:45 +08:00
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If unsure, say Y.
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2012-03-19 02:07:42 +08:00
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2019-06-20 05:24:10 +08:00
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config SUNRPC_DISABLE_INSECURE_ENCTYPES
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2019-02-12 00:24:43 +08:00
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bool "Secure RPC: Disable insecure Kerberos encryption types"
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depends on RPCSEC_GSS_KRB5
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default n
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help
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Choose Y here to disable the use of deprecated encryption types
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with the Kerberos version 5 GSS-API mechanism (RFC 1964). The
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deprecated encryption types include DES-CBC-MD5, DES-CBC-CRC,
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and DES-CBC-MD4. These types were deprecated by RFC 6649 because
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they were found to be insecure.
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N is the default because many sites have deployed KDCs and
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keytabs that contain only these deprecated encryption types.
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Choosing Y prevents the use of known-insecure encryption types
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but might result in compatibility problems.
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2012-03-19 02:07:42 +08:00
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config SUNRPC_DEBUG
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bool "RPC: Enable dprintk debugging"
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depends on SUNRPC && SYSCTL
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2014-11-27 03:44:43 +08:00
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select DEBUG_FS
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2012-03-19 02:07:42 +08:00
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help
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This option enables a sysctl-based debugging interface
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that is be used by the 'rpcdebug' utility to turn on or off
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logging of different aspects of the kernel RPC activity.
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Disabling this option will make your kernel slightly smaller,
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but makes troubleshooting NFS issues significantly harder.
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If unsure, say Y.
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2014-03-19 07:45:47 +08:00
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2015-06-04 23:21:42 +08:00
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config SUNRPC_XPRT_RDMA
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tristate "RPC-over-RDMA transport"
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2018-05-26 05:29:59 +08:00
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depends on SUNRPC && INFINIBAND && INFINIBAND_ADDR_TRANS
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2014-03-19 07:45:47 +08:00
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default SUNRPC && INFINIBAND
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2017-04-10 01:06:16 +08:00
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select SG_POOL
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2014-03-19 07:45:47 +08:00
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help
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2015-06-04 23:21:42 +08:00
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This option allows the NFS client and server to use RDMA
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transports (InfiniBand, iWARP, or RoCE).
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2014-03-19 07:45:47 +08:00
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2015-06-04 23:21:42 +08:00
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To compile this support as a module, choose M. The module
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will be called rpcrdma.ko.
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2014-03-19 07:45:47 +08:00
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2015-06-04 23:21:42 +08:00
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If unsure, or you know there is no RDMA capability on your
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hardware platform, say N.
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