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| author | Parav Pandit <parav@mellanox.com> | 2019-02-26 14:01:49 +0200 |
|---|---|---|
| committer | Jason Gunthorpe <jgg@mellanox.com> | 2019-03-28 14:52:02 -0300 |
| commit | 2b34c558022673c0d6393dd7941d417f1b5a7236 (patch) | |
| tree | 033a3fa72e47d1ab80fcd977f8a0c8d1e667814d /drivers/infiniband/core/nldev.c | |
| parent | cb7e0e130503cb8e5ee6a7e8983bf71ed408516f (diff) | |
| download | linux-2b34c558022673c0d6393dd7941d417f1b5a7236.tar.gz linux-2b34c558022673c0d6393dd7941d417f1b5a7236.tar.bz2 linux-2b34c558022673c0d6393dd7941d417f1b5a7236.zip | |
RDMA/core: Add command to set ib_core device net namspace sharing mode
Add netlink command that enables/disables sharing rdma device among
multiple net namespaces.
Using rdma tool,
$rdma sys set netns shared (default mode)
When rdma subsystem netns mode is set to shared mode, rdma devices
will be accessible in all net namespaces.
Using rdma tool,
$rdma sys set netns exclusive
When rdma subsystem netns mode is set to exclusive mode, devices
will be accessible in only one net namespace at any given
point of time.
If there are any net namespaces other than default init_net exists,
while executing this command, it will fail and mode cannot be changed.
To change this mode, netlink command is used instead of sysctl, because
netlink command allows to auto load a module.
Signed-off-by: Parav Pandit <parav@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Diffstat (limited to 'drivers/infiniband/core/nldev.c')
| -rw-r--r-- | drivers/infiniband/core/nldev.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/drivers/infiniband/core/nldev.c b/drivers/infiniband/core/nldev.c index 49c048738f94..28b4ed8f9930 100644 --- a/drivers/infiniband/core/nldev.c +++ b/drivers/infiniband/core/nldev.c @@ -1341,6 +1341,27 @@ static int nldev_get_sys_get_dumpit(struct sk_buff *skb, return skb->len; } +static int nldev_set_sys_set_doit(struct sk_buff *skb, struct nlmsghdr *nlh, + struct netlink_ext_ack *extack) +{ + struct nlattr *tb[RDMA_NLDEV_ATTR_MAX]; + u8 enable; + int err; + + err = nlmsg_parse(nlh, 0, tb, RDMA_NLDEV_ATTR_MAX - 1, + nldev_policy, extack); + if (err || !tb[RDMA_NLDEV_SYS_ATTR_NETNS_MODE]) + return -EINVAL; + + enable = nla_get_u8(tb[RDMA_NLDEV_SYS_ATTR_NETNS_MODE]); + /* Only 0 and 1 are supported */ + if (enable > 1) + return -EINVAL; + + err = rdma_compatdev_set(enable); + return err; +} + static const struct rdma_nl_cbs nldev_cb_table[RDMA_NLDEV_NUM_OPS] = { [RDMA_NLDEV_CMD_GET] = { .doit = nldev_get_doit, @@ -1389,6 +1410,10 @@ static const struct rdma_nl_cbs nldev_cb_table[RDMA_NLDEV_NUM_OPS] = { [RDMA_NLDEV_CMD_SYS_GET] = { .dump = nldev_get_sys_get_dumpit, }, + [RDMA_NLDEV_CMD_SYS_SET] = { + .doit = nldev_set_sys_set_doit, + .flags = RDMA_NL_ADMIN_PERM, + }, }; void __init nldev_init(void) |