From patchwork Sat Nov 4 11:13:46 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lorenzo Bianconi X-Patchwork-Id: 13445483 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 9CD5F13FEF for ; Sat, 4 Nov 2023 11:14:19 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="eEytuiZL" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 1AC11C433C7; Sat, 4 Nov 2023 11:14:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1699096459; bh=pKoovObKbzE/H27RYJgEwN6tg28uYNoL8HegIv0A/2Q=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=eEytuiZLCMIn8VTG/JzPEuC776EOPXZvn7yzRSGO9zinTiK3+SYp09ttr8pkgwZJs TvmVAQa+NxjjVM6t2SHCfBWx91br3UjGZ8X2jDqft9kteUxmfH6R1cXVOXONYxiPqm Ku2wMQVC9lBZOsmUHNullg4Se0bj05VkpbKG72mfKcwzOcjmVZ/2qBPj76AXUUxQwA YAG5vBaHKAh2POx4lZBSmVbXM7w6vslkVNG7z87TpQSub3mLFS7mFIGyDlBV8Brbi9 0LOPihXqxgRSzz6RLj+kW/AbS8yeJ2NKqdqPTeQGB4voGr/iiiOR7xvynqf9eUsI0D TOh0mw53+6C4g== From: Lorenzo Bianconi To: linux-nfs@vger.kernel.org Cc: lorenzo.bianconi@redhat.com, neilb@suse.de, chuck.lever@oracle.com, netdev@vger.kernel.org, jlayton@kernel.org, kuba@kernel.org Subject: [PATCH v4 2/3] NFSD: convert write_version to netlink command Date: Sat, 4 Nov 2023 12:13:46 +0100 Message-ID: <3785da26e14c13e194510eaad9c6bd846d691d5f.1699095665.git.lorenzo@kernel.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: References: Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Introduce write_version netlink command similar to the ones available through the procfs. Signed-off-by: Lorenzo Bianconi --- Documentation/netlink/specs/nfsd.yaml | 32 ++++++++ fs/nfsd/netlink.c | 19 +++++ fs/nfsd/netlink.h | 3 + fs/nfsd/nfsctl.c | 105 ++++++++++++++++++++++++++ include/uapi/linux/nfsd_netlink.h | 11 +++ tools/net/ynl/generated/nfsd-user.c | 81 ++++++++++++++++++++ tools/net/ynl/generated/nfsd-user.h | 55 ++++++++++++++ 7 files changed, 306 insertions(+) diff --git a/Documentation/netlink/specs/nfsd.yaml b/Documentation/netlink/specs/nfsd.yaml index c92e1425d316..6c5e42bb20f6 100644 --- a/Documentation/netlink/specs/nfsd.yaml +++ b/Documentation/netlink/specs/nfsd.yaml @@ -68,6 +68,18 @@ attribute-sets: - name: threads type: u32 + - + name: server-version + attributes: + - + name: major + type: u32 + - + name: minor + type: u32 + - + name: status + type: u8 operations: list: @@ -110,3 +122,23 @@ operations: reply: attributes: - threads + - + name: version-set + doc: enable/disable server version + attribute-set: server-version + flags: [ admin-perm ] + do: + request: + attributes: + - major + - minor + - status + - + name: version-get + doc: dump server versions + attribute-set: server-version + dump: + reply: + attributes: + - major + - minor diff --git a/fs/nfsd/netlink.c b/fs/nfsd/netlink.c index 1a59a8e6c7e2..0608a7bd193b 100644 --- a/fs/nfsd/netlink.c +++ b/fs/nfsd/netlink.c @@ -15,6 +15,13 @@ static const struct nla_policy nfsd_threads_set_nl_policy[NFSD_A_SERVER_WORKER_T [NFSD_A_SERVER_WORKER_THREADS] = { .type = NLA_U32, }, }; +/* NFSD_CMD_VERSION_SET - do */ +static const struct nla_policy nfsd_version_set_nl_policy[NFSD_A_SERVER_VERSION_STATUS + 1] = { + [NFSD_A_SERVER_VERSION_MAJOR] = { .type = NLA_U32, }, + [NFSD_A_SERVER_VERSION_MINOR] = { .type = NLA_U32, }, + [NFSD_A_SERVER_VERSION_STATUS] = { .type = NLA_U8, }, +}; + /* Ops table for nfsd */ static const struct genl_split_ops nfsd_nl_ops[] = { { @@ -36,6 +43,18 @@ static const struct genl_split_ops nfsd_nl_ops[] = { .doit = nfsd_nl_threads_get_doit, .flags = GENL_CMD_CAP_DO, }, + { + .cmd = NFSD_CMD_VERSION_SET, + .doit = nfsd_nl_version_set_doit, + .policy = nfsd_version_set_nl_policy, + .maxattr = NFSD_A_SERVER_VERSION_STATUS, + .flags = GENL_ADMIN_PERM | GENL_CMD_CAP_DO, + }, + { + .cmd = NFSD_CMD_VERSION_GET, + .dumpit = nfsd_nl_version_get_dumpit, + .flags = GENL_CMD_CAP_DUMP, + }, }; struct genl_family nfsd_nl_family __ro_after_init = { diff --git a/fs/nfsd/netlink.h b/fs/nfsd/netlink.h index 4137fac477e4..7d203cec08e4 100644 --- a/fs/nfsd/netlink.h +++ b/fs/nfsd/netlink.h @@ -18,6 +18,9 @@ int nfsd_nl_rpc_status_get_dumpit(struct sk_buff *skb, struct netlink_callback *cb); int nfsd_nl_threads_set_doit(struct sk_buff *skb, struct genl_info *info); int nfsd_nl_threads_get_doit(struct sk_buff *skb, struct genl_info *info); +int nfsd_nl_version_set_doit(struct sk_buff *skb, struct genl_info *info); +int nfsd_nl_version_get_dumpit(struct sk_buff *skb, + struct netlink_callback *cb); extern struct genl_family nfsd_nl_family; diff --git a/fs/nfsd/nfsctl.c b/fs/nfsd/nfsctl.c index 0d0394887506..5cf6238617d9 100644 --- a/fs/nfsd/nfsctl.c +++ b/fs/nfsd/nfsctl.c @@ -1751,6 +1751,111 @@ int nfsd_nl_threads_get_doit(struct sk_buff *skb, struct genl_info *info) return err; } +/** + * nfsd_nl_version_set_doit - enable/disable the provided nfs server version + * @skb: reply buffer + * @info: netlink metadata and command arguments + * + * Return 0 on success or a negative errno. + */ +int nfsd_nl_version_set_doit(struct sk_buff *skb, struct genl_info *info) +{ + struct nfsd_net *nn = net_generic(genl_info_net(info), nfsd_net_id); + enum vers_op cmd; + u32 major, minor; + u8 status; + int ret; + + if (GENL_REQ_ATTR_CHECK(info, NFSD_A_SERVER_VERSION_MAJOR) || + GENL_REQ_ATTR_CHECK(info, NFSD_A_SERVER_VERSION_MINOR) || + GENL_REQ_ATTR_CHECK(info, NFSD_A_SERVER_VERSION_STATUS)) + return -EINVAL; + + major = nla_get_u32(info->attrs[NFSD_A_SERVER_VERSION_MAJOR]); + minor = nla_get_u32(info->attrs[NFSD_A_SERVER_VERSION_MINOR]); + + status = nla_get_u32(info->attrs[NFSD_A_SERVER_VERSION_STATUS]); + cmd = !!status ? NFSD_SET : NFSD_CLEAR; + + mutex_lock(&nfsd_mutex); + switch (major) { + case 4: + ret = nfsd_minorversion(nn, minor, cmd); + break; + case 2: + case 3: + if (!minor) { + ret = nfsd_vers(nn, major, cmd); + break; + } + fallthrough; + default: + ret = -EINVAL; + break; + } + mutex_unlock(&nfsd_mutex); + + return ret; +} + +/** + * nfsd_nl_version_get_doit - Handle verion_get dumpit + * @skb: reply buffer + * @cb: netlink metadata and command arguments + * + * Returns the size of the reply or a negative errno. + */ +int nfsd_nl_version_get_dumpit(struct sk_buff *skb, + struct netlink_callback *cb) +{ + struct nfsd_net *nn = net_generic(sock_net(skb->sk), nfsd_net_id); + int i, ret = -ENOMEM; + + mutex_lock(&nfsd_mutex); + + for (i = 2; i <= 4; i++) { + int j; + + if (i < cb->args[0]) /* already consumed */ + continue; + + if (!nfsd_vers(nn, i, NFSD_AVAIL)) + continue; + + for (j = 0; j <= NFSD_SUPPORTED_MINOR_VERSION; j++) { + void *hdr; + + if (!nfsd_vers(nn, i, NFSD_TEST)) + continue; + + /* NFSv{2,3} does not support minor numbers */ + if (i < 4 && j) + continue; + + if (i == 4 && !nfsd_minorversion(nn, j, NFSD_TEST)) + continue; + + hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, + cb->nlh->nlmsg_seq, &nfsd_nl_family, + 0, NFSD_CMD_VERSION_GET); + if (!hdr) + goto out; + + if (nla_put_u32(skb, NFSD_A_SERVER_VERSION_MAJOR, i) || + nla_put_u32(skb, NFSD_A_SERVER_VERSION_MINOR, j)) + goto out; + + genlmsg_end(skb, hdr); + } + } + cb->args[0] = i; + ret = skb->len; +out: + mutex_unlock(&nfsd_mutex); + + return ret; +} + /** * nfsd_net_init - Prepare the nfsd_net portion of a new net namespace * @net: a freshly-created network namespace diff --git a/include/uapi/linux/nfsd_netlink.h b/include/uapi/linux/nfsd_netlink.h index 99f7855852a1..51f078b26af4 100644 --- a/include/uapi/linux/nfsd_netlink.h +++ b/include/uapi/linux/nfsd_netlink.h @@ -36,10 +36,21 @@ enum { NFSD_A_SERVER_WORKER_MAX = (__NFSD_A_SERVER_WORKER_MAX - 1) }; +enum { + NFSD_A_SERVER_VERSION_MAJOR = 1, + NFSD_A_SERVER_VERSION_MINOR, + NFSD_A_SERVER_VERSION_STATUS, + + __NFSD_A_SERVER_VERSION_MAX, + NFSD_A_SERVER_VERSION_MAX = (__NFSD_A_SERVER_VERSION_MAX - 1) +}; + enum { NFSD_CMD_RPC_STATUS_GET = 1, NFSD_CMD_THREADS_SET, NFSD_CMD_THREADS_GET, + NFSD_CMD_VERSION_SET, + NFSD_CMD_VERSION_GET, __NFSD_CMD_MAX, NFSD_CMD_MAX = (__NFSD_CMD_MAX - 1) diff --git a/tools/net/ynl/generated/nfsd-user.c b/tools/net/ynl/generated/nfsd-user.c index 342a00b0474a..dceaccbdfb69 100644 --- a/tools/net/ynl/generated/nfsd-user.c +++ b/tools/net/ynl/generated/nfsd-user.c @@ -17,6 +17,8 @@ static const char * const nfsd_op_strmap[] = { [NFSD_CMD_RPC_STATUS_GET] = "rpc-status-get", [NFSD_CMD_THREADS_SET] = "threads-set", [NFSD_CMD_THREADS_GET] = "threads-get", + [NFSD_CMD_VERSION_SET] = "version-set", + [NFSD_CMD_VERSION_GET] = "version-get", }; const char *nfsd_op_str(int op) @@ -58,6 +60,17 @@ struct ynl_policy_nest nfsd_server_worker_nest = { .table = nfsd_server_worker_policy, }; +struct ynl_policy_attr nfsd_server_version_policy[NFSD_A_SERVER_VERSION_MAX + 1] = { + [NFSD_A_SERVER_VERSION_MAJOR] = { .name = "major", .type = YNL_PT_U32, }, + [NFSD_A_SERVER_VERSION_MINOR] = { .name = "minor", .type = YNL_PT_U32, }, + [NFSD_A_SERVER_VERSION_STATUS] = { .name = "status", .type = YNL_PT_U8, }, +}; + +struct ynl_policy_nest nfsd_server_version_nest = { + .max_attr = NFSD_A_SERVER_VERSION_MAX, + .table = nfsd_server_version_policy, +}; + /* Common nested types */ /* ============== NFSD_CMD_RPC_STATUS_GET ============== */ /* NFSD_CMD_RPC_STATUS_GET - dump */ @@ -182,6 +195,74 @@ struct nfsd_threads_get_rsp *nfsd_threads_get(struct ynl_sock *ys) return NULL; } +/* ============== NFSD_CMD_VERSION_SET ============== */ +/* NFSD_CMD_VERSION_SET - do */ +void nfsd_version_set_req_free(struct nfsd_version_set_req *req) +{ + free(req); +} + +int nfsd_version_set(struct ynl_sock *ys, struct nfsd_version_set_req *req) +{ + struct nlmsghdr *nlh; + int err; + + nlh = ynl_gemsg_start_req(ys, ys->family_id, NFSD_CMD_VERSION_SET, 1); + ys->req_policy = &nfsd_server_version_nest; + + if (req->_present.major) + mnl_attr_put_u32(nlh, NFSD_A_SERVER_VERSION_MAJOR, req->major); + if (req->_present.minor) + mnl_attr_put_u32(nlh, NFSD_A_SERVER_VERSION_MINOR, req->minor); + if (req->_present.status) + mnl_attr_put_u8(nlh, NFSD_A_SERVER_VERSION_STATUS, req->status); + + err = ynl_exec(ys, nlh, NULL); + if (err < 0) + return -1; + + return 0; +} + +/* ============== NFSD_CMD_VERSION_GET ============== */ +/* NFSD_CMD_VERSION_GET - dump */ +void nfsd_version_get_list_free(struct nfsd_version_get_list *rsp) +{ + struct nfsd_version_get_list *next = rsp; + + while ((void *)next != YNL_LIST_END) { + rsp = next; + next = rsp->next; + + free(rsp); + } +} + +struct nfsd_version_get_list *nfsd_version_get_dump(struct ynl_sock *ys) +{ + struct ynl_dump_state yds = {}; + struct nlmsghdr *nlh; + int err; + + yds.ys = ys; + yds.alloc_sz = sizeof(struct nfsd_version_get_list); + yds.cb = nfsd_version_get_rsp_parse; + yds.rsp_cmd = NFSD_CMD_VERSION_GET; + yds.rsp_policy = &nfsd_server_version_nest; + + nlh = ynl_gemsg_start_dump(ys, ys->family_id, NFSD_CMD_VERSION_GET, 1); + + err = ynl_exec_dump(ys, nlh, &yds); + if (err < 0) + goto free_list; + + return yds.first; + +free_list: + nfsd_version_get_list_free(yds.first); + return NULL; +} + const struct ynl_family ynl_nfsd_family = { .name = "nfsd", }; diff --git a/tools/net/ynl/generated/nfsd-user.h b/tools/net/ynl/generated/nfsd-user.h index 4c11119217f1..2272cb25c364 100644 --- a/tools/net/ynl/generated/nfsd-user.h +++ b/tools/net/ynl/generated/nfsd-user.h @@ -77,4 +77,59 @@ void nfsd_threads_get_rsp_free(struct nfsd_threads_get_rsp *rsp); */ struct nfsd_threads_get_rsp *nfsd_threads_get(struct ynl_sock *ys); +/* ============== NFSD_CMD_VERSION_SET ============== */ +/* NFSD_CMD_VERSION_SET - do */ +struct nfsd_version_set_req { + struct { + __u32 major:1; + __u32 minor:1; + __u32 status:1; + } _present; + + __u32 major; + __u32 minor; + __u8 status; +}; + +static inline struct nfsd_version_set_req *nfsd_version_set_req_alloc(void) +{ + return calloc(1, sizeof(struct nfsd_version_set_req)); +} +void nfsd_version_set_req_free(struct nfsd_version_set_req *req); + +static inline void +nfsd_version_set_req_set_major(struct nfsd_version_set_req *req, __u32 major) +{ + req->_present.major = 1; + req->major = major; +} +static inline void +nfsd_version_set_req_set_minor(struct nfsd_version_set_req *req, __u32 minor) +{ + req->_present.minor = 1; + req->minor = minor; +} +static inline void +nfsd_version_set_req_set_status(struct nfsd_version_set_req *req, __u8 status) +{ + req->_present.status = 1; + req->status = status; +} + +/* + * enable/disable server version + */ +int nfsd_version_set(struct ynl_sock *ys, struct nfsd_version_set_req *req); + +/* ============== NFSD_CMD_VERSION_GET ============== */ +/* NFSD_CMD_VERSION_GET - dump */ +struct nfsd_version_get_list { + struct nfsd_version_get_list *next; + struct nfsd_version_get_rsp obj __attribute__ ((aligned (8))); +}; + +void nfsd_version_get_list_free(struct nfsd_version_get_list *rsp); + +struct nfsd_version_get_list *nfsd_version_get_dump(struct ynl_sock *ys); + #endif /* _LINUX_NFSD_GEN_H */