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nfsd: new netlink ops to get/set server pool_mode

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Signed-off-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
This commit is contained in:
Jeff Layton 2024-06-14 08:59:10 -04:00 committed by Chuck Lever
parent 5f71f3c325
commit 00506072d7
5 changed files with 113 additions and 0 deletions
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27
Documentation/netlink/specs/nfsd.yaml
View File

@ -115,6 +115,15 @@ attribute-sets:
type: nest
nested-attributes: sock
multi-attr: true
-
name: pool-mode
attributes:
-
name: mode
type: string
-
name: npools
type: u32
operations:
list:
@ -195,3 +204,21 @@ operations:
reply:
attributes:
- addr
-
name: pool-mode-set
doc: set the current server pool-mode
attribute-set: pool-mode
flags: [ admin-perm ]
do:
request:
attributes:
- mode
-
name: pool-mode-get
doc: get info about server pool-mode
attribute-set: pool-mode
do:
reply:
attributes:
- mode
- npools

17
fs/nfsd/netlink.c
View File

@ -40,6 +40,11 @@ static const struct nla_policy nfsd_listener_set_nl_policy[NFSD_A_SERVER_SOCK_AD
[NFSD_A_SERVER_SOCK_ADDR] = NLA_POLICY_NESTED(nfsd_sock_nl_policy),
};
/* NFSD_CMD_POOL_MODE_SET - do */
static const struct nla_policy nfsd_pool_mode_set_nl_policy[NFSD_A_POOL_MODE_MODE + 1] = {
[NFSD_A_POOL_MODE_MODE] = { .type = NLA_NUL_STRING, },
};
/* Ops table for nfsd */
static const struct genl_split_ops nfsd_nl_ops[] = {
{
@ -83,6 +88,18 @@ static const struct genl_split_ops nfsd_nl_ops[] = {
.doit = nfsd_nl_listener_get_doit,
.flags = GENL_CMD_CAP_DO,
},
{
.cmd = NFSD_CMD_POOL_MODE_SET,
.doit = nfsd_nl_pool_mode_set_doit,
.policy = nfsd_pool_mode_set_nl_policy,
.maxattr = NFSD_A_POOL_MODE_MODE,
.flags = GENL_ADMIN_PERM | GENL_CMD_CAP_DO,
},
{
.cmd = NFSD_CMD_POOL_MODE_GET,
.doit = nfsd_nl_pool_mode_get_doit,
.flags = GENL_CMD_CAP_DO,
},
};
struct genl_family nfsd_nl_family __ro_after_init = {

2
fs/nfsd/netlink.h
View File

@ -23,6 +23,8 @@ int nfsd_nl_version_set_doit(struct sk_buff *skb, struct genl_info *info);
int nfsd_nl_version_get_doit(struct sk_buff *skb, struct genl_info *info);
int nfsd_nl_listener_set_doit(struct sk_buff *skb, struct genl_info *info);
int nfsd_nl_listener_get_doit(struct sk_buff *skb, struct genl_info *info);
int nfsd_nl_pool_mode_set_doit(struct sk_buff *skb, struct genl_info *info);
int nfsd_nl_pool_mode_get_doit(struct sk_buff *skb, struct genl_info *info);
extern struct genl_family nfsd_nl_family;

57
fs/nfsd/nfsctl.c
View File

@ -2156,6 +2156,63 @@ err_free_msg:
return err;
}
/**
* nfsd_nl_pool_mode_set_doit - set the number of running threads
* @skb: reply buffer
* @info: netlink metadata and command arguments
*
* Return 0 on success or a negative errno.
*/
int nfsd_nl_pool_mode_set_doit(struct sk_buff *skb, struct genl_info *info)
{
const struct nlattr *attr;
if (GENL_REQ_ATTR_CHECK(info, NFSD_A_POOL_MODE_MODE))
return -EINVAL;
attr = info->attrs[NFSD_A_POOL_MODE_MODE];
return sunrpc_set_pool_mode(nla_data(attr));
}
/**
* nfsd_nl_pool_mode_get_doit - get info about pool_mode
* @skb: reply buffer
* @info: netlink metadata and command arguments
*
* Return 0 on success or a negative errno.
*/
int nfsd_nl_pool_mode_get_doit(struct sk_buff *skb, struct genl_info *info)
{
struct net *net = genl_info_net(info);
char buf[16];
void *hdr;
int err;
if (sunrpc_get_pool_mode(buf, ARRAY_SIZE(buf)) >= ARRAY_SIZE(buf))
return -ERANGE;
skb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!skb)
return -ENOMEM;
err = -EMSGSIZE;
hdr = genlmsg_iput(skb, info);
if (!hdr)
goto err_free_msg;
err = nla_put_string(skb, NFSD_A_POOL_MODE_MODE, buf) |
nla_put_u32(skb, NFSD_A_POOL_MODE_NPOOLS, nfsd_nrpools(net));
if (err)
goto err_free_msg;
genlmsg_end(skb, hdr);
return genlmsg_reply(skb, info);
err_free_msg:
nlmsg_free(skb);
return err;
}
/**
* nfsd_net_init - Prepare the nfsd_net portion of a new net namespace
* @net: a freshly-created network namespace

10
include/uapi/linux/nfsd_netlink.h
View File

@ -70,6 +70,14 @@ enum {
NFSD_A_SERVER_SOCK_MAX = (__NFSD_A_SERVER_SOCK_MAX - 1)
};
enum {
NFSD_A_POOL_MODE_MODE = 1,
NFSD_A_POOL_MODE_NPOOLS,
__NFSD_A_POOL_MODE_MAX,
NFSD_A_POOL_MODE_MAX = (__NFSD_A_POOL_MODE_MAX - 1)
};
enum {
NFSD_CMD_RPC_STATUS_GET = 1,
NFSD_CMD_THREADS_SET,
@ -78,6 +86,8 @@ enum {
NFSD_CMD_VERSION_GET,
NFSD_CMD_LISTENER_SET,
NFSD_CMD_LISTENER_GET,
NFSD_CMD_POOL_MODE_SET,
NFSD_CMD_POOL_MODE_GET,
__NFSD_CMD_MAX,
NFSD_CMD_MAX = (__NFSD_CMD_MAX - 1)