From a5cbd5fc22d5043a8a76e15d75d031fe24d1f69c Mon Sep 17 00:00:00 2001 From: Ilya Dryomov Date: Fri, 30 Oct 2020 13:30:51 +0100 Subject: libceph, ceph: get and handle cluster maps with addrvecs In preparation for msgr2, make the cluster send us maps with addrvecs including both LEGACY and MSGR2 addrs instead of a single LEGACY addr. This means advertising support for SERVER_NAUTILUS and also some older features: SERVER_MIMIC, MONENC and MONNAMES. MONNAMES and MONENC are actually pre-argonaut, we just never updated ceph_monmap_decode() for them. Decoding is unconditional, see commit 23c625ce3065 ("libceph: assume argonaut on the server side"). SERVER_MIMIC doesn't bear any meaning for the kernel client. Since ceph_decode_entity_addrvec() is guarded by encoding version checks (and in msgr2 case it is guarded implicitly by the fact that server is speaking msgr2), we assume MSG_ADDR2 for it. Signed-off-by: Ilya Dryomov --- net/ceph/decode.c | 56 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 56 insertions(+) (limited to 'net/ceph/decode.c') diff --git a/net/ceph/decode.c b/net/ceph/decode.c index eea529595a7a..6429b6713507 100644 --- a/net/ceph/decode.c +++ b/net/ceph/decode.c @@ -1,4 +1,5 @@ // SPDX-License-Identifier: GPL-2.0 +#include #include @@ -82,3 +83,58 @@ bad: } EXPORT_SYMBOL(ceph_decode_entity_addr); +/* + * Return addr of desired type (MSGR2 or LEGACY) or error. + * Make sure there is only one match. + * + * Assume encoding with MSG_ADDR2. + */ +int ceph_decode_entity_addrvec(void **p, void *end, bool msgr2, + struct ceph_entity_addr *addr) +{ + __le32 my_type = msgr2 ? CEPH_ENTITY_ADDR_TYPE_MSGR2 : + CEPH_ENTITY_ADDR_TYPE_LEGACY; + struct ceph_entity_addr tmp_addr; + int addr_cnt; + bool found; + u8 marker; + int ret; + int i; + + ceph_decode_8_safe(p, end, marker, e_inval); + if (marker != 2) { + pr_err("bad addrvec marker %d\n", marker); + return -EINVAL; + } + + ceph_decode_32_safe(p, end, addr_cnt, e_inval); + + found = false; + for (i = 0; i < addr_cnt; i++) { + ret = ceph_decode_entity_addr(p, end, &tmp_addr); + if (ret) + return ret; + + if (tmp_addr.type == my_type) { + if (found) { + pr_err("another match of type %d in addrvec\n", + le32_to_cpu(my_type)); + return -EINVAL; + } + + memcpy(addr, &tmp_addr, sizeof(*addr)); + found = true; + } + } + if (!found && addr_cnt != 0) { + pr_err("no match of type %d in addrvec\n", + le32_to_cpu(my_type)); + return -ENOENT; + } + + return 0; + +e_inval: + return -EINVAL; +} +EXPORT_SYMBOL(ceph_decode_entity_addrvec); -- cgit