Something went wrong. Try again.
(I'm so sorry!) Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel os linux
Something went wrong. Try again.
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381382383384385386387388389390391392393394395396397398399400401402403404405406407408409410411412413414415416417418419420421422423424425426427428429430431432433434435436437438439440441442443444445446447448449450451452453454455456457458459460461462463464465466467468469470471472473474475476477478479480481482483484485486487488489490491492493494495496497498499500501502503504505506507508509510511512513514515516517518519520521522523524525526527528529530531532533534535536537538539540541542543544545546547548549550551552553554555556557558559560561562563564565566567568569570571572573574575576577578579580581582583584585586587588589590591592593594595596597598599600601602603604605606607608609610611612613614615616617618619620621622623624625626627628629630631632633634635636637638639640641642643644645646647648649650651652653654655656657658659660661662// SPDX-License-Identifier: GPL-2.0#include <linux/ceph/ceph_debug.h>
#include <linux/module.h>#include <linux/err.h>#include <linux/slab.h>
#include <linux/ceph/types.h>#include <linux/ceph/decode.h>#include <linux/ceph/libceph.h>#include <linux/ceph/messenger.h>#include "auth_none.h"#include "auth_x.h"
/* * get protocol handler */static u32 supported_protocols[] = { CEPH_AUTH_NONE, CEPH_AUTH_CEPHX};
static int init_protocol(struct ceph_auth_client *ac, int proto){ dout("%s proto %d\n", __func__, proto);
switch (proto) { case CEPH_AUTH_NONE: return ceph_auth_none_init(ac); case CEPH_AUTH_CEPHX: return ceph_x_init(ac); default: pr_err("bad auth protocol %d\n", proto); return -EINVAL; }}
void ceph_auth_set_global_id(struct ceph_auth_client *ac, u64 global_id){ dout("%s global_id %llu\n", __func__, global_id);
if (!global_id) pr_err("got zero global_id\n");
if (ac->global_id && global_id != ac->global_id) pr_err("global_id changed from %llu to %llu\n", ac->global_id, global_id);
ac->global_id = global_id;}
/* * setup, teardown. */struct ceph_auth_client *ceph_auth_init(const char *name, const struct ceph_crypto_key *key, const int *con_modes){ struct ceph_auth_client *ac;
ac = kzalloc_obj(*ac, GFP_NOFS); if (!ac) return ERR_PTR(-ENOMEM);
mutex_init(&ac->mutex); ac->negotiating = true; if (name) ac->name = name; else ac->name = CEPH_AUTH_NAME_DEFAULT; ac->key = key; ac->preferred_mode = con_modes[0]; ac->fallback_mode = con_modes[1];
dout("%s name '%s' preferred_mode %d fallback_mode %d\n", __func__, ac->name, ac->preferred_mode, ac->fallback_mode); return ac;}
void ceph_auth_destroy(struct ceph_auth_client *ac){ dout("auth_destroy %p\n", ac); if (ac->ops) ac->ops->destroy(ac); kfree(ac);}
/* * Reset occurs when reconnecting to the monitor. */void ceph_auth_reset(struct ceph_auth_client *ac){ mutex_lock(&ac->mutex); dout("auth_reset %p\n", ac); if (ac->ops && !ac->negotiating) ac->ops->reset(ac); ac->negotiating = true; mutex_unlock(&ac->mutex);}
/* * EntityName, not to be confused with entity_name_t */int ceph_auth_entity_name_encode(const char *name, void **p, void *end){ int len = strlen(name);
if (*p + 2*sizeof(u32) + len > end) return -ERANGE; ceph_encode_32(p, CEPH_ENTITY_TYPE_CLIENT); ceph_encode_32(p, len); ceph_encode_copy(p, name, len); return 0;}
/* * Initiate protocol negotiation with monitor. Include entity name * and list supported protocols. */int ceph_auth_build_hello(struct ceph_auth_client *ac, void *buf, size_t len){ struct ceph_mon_request_header *monhdr = buf; void *p = monhdr + 1, *end = buf + len, *lenp; int i, num; int ret;
mutex_lock(&ac->mutex); dout("auth_build_hello\n"); monhdr->have_version = 0; monhdr->session_mon = cpu_to_le16(-1); monhdr->session_mon_tid = 0;
ceph_encode_32(&p, CEPH_AUTH_UNKNOWN); /* no protocol, yet */
lenp = p; p += sizeof(u32);
ceph_decode_need(&p, end, 1 + sizeof(u32), bad); ceph_encode_8(&p, 1); num = ARRAY_SIZE(supported_protocols); ceph_encode_32(&p, num); ceph_decode_need(&p, end, num * sizeof(u32), bad); for (i = 0; i < num; i++) ceph_encode_32(&p, supported_protocols[i]);
ret = ceph_auth_entity_name_encode(ac->name, &p, end); if (ret < 0) goto out; ceph_decode_need(&p, end, sizeof(u64), bad); ceph_encode_64(&p, ac->global_id);
ceph_encode_32(&lenp, p - lenp - sizeof(u32)); ret = p - buf;out: mutex_unlock(&ac->mutex); return ret;
bad: ret = -ERANGE; goto out;}
static int build_request(struct ceph_auth_client *ac, bool add_header, void *buf, int buf_len){ void *end = buf + buf_len; void *p; int ret;
p = buf; if (add_header) { /* struct ceph_mon_request_header + protocol */ ceph_encode_64_safe(&p, end, 0, e_range); ceph_encode_16_safe(&p, end, -1, e_range); ceph_encode_64_safe(&p, end, 0, e_range); ceph_encode_32_safe(&p, end, ac->protocol, e_range); }
ceph_encode_need(&p, end, sizeof(u32), e_range); ret = ac->ops->build_request(ac, p + sizeof(u32), end); if (ret < 0) { pr_err("auth protocol '%s' building request failed: %d\n", ceph_auth_proto_name(ac->protocol), ret); return ret; } dout(" built request %d bytes\n", ret); ceph_encode_32(&p, ret); return p + ret - buf;
e_range: return -ERANGE;}
/* * Handle auth message from monitor. */int ceph_handle_auth_reply(struct ceph_auth_client *ac, void *buf, size_t len, void *reply_buf, size_t reply_len){ void *p = buf; void *end = buf + len; int protocol; s32 result; u64 global_id; void *payload, *payload_end; u32 payload_len; char *result_msg; u32 result_msg_len; int ret = -EINVAL;
mutex_lock(&ac->mutex); dout("handle_auth_reply %p %p\n", p, end); ceph_decode_need(&p, end, sizeof(u32) * 3 + sizeof(u64), bad); protocol = ceph_decode_32(&p); result = ceph_decode_32(&p); global_id = ceph_decode_64(&p); payload_len = ceph_decode_32(&p); ceph_decode_need(&p, end, payload_len, bad); payload = p; p += payload_len; ceph_decode_need(&p, end, sizeof(u32), bad); result_msg_len = ceph_decode_32(&p); ceph_decode_need(&p, end, result_msg_len, bad); result_msg = p; p += result_msg_len; if (p != end) goto bad;
dout(" result %d '%.*s' gid %llu len %d\n", result, result_msg_len, result_msg, global_id, payload_len);
payload_end = payload + payload_len;
if (ac->negotiating) { /* server does not support our protocols? */ if (!protocol && result < 0) { ret = result; goto out; } /* set up (new) protocol handler? */ if (ac->protocol && ac->protocol != protocol) { ac->ops->destroy(ac); ac->protocol = 0; ac->ops = NULL; } if (!ac->protocol) { ret = init_protocol(ac, protocol); if (ret) { pr_err("auth protocol '%s' init failed: %d\n", ceph_auth_proto_name(protocol), ret); goto out; } }
ac->negotiating = false; }
if (result < 0) { pr_err("auth protocol '%s' mauth authentication failed: %d\n", ceph_auth_proto_name(ac->protocol), result); ret = result; goto out; }
ret = ac->ops->handle_reply(ac, global_id, payload, payload_end, NULL, NULL, NULL, NULL); if (ret == -EAGAIN) { ret = build_request(ac, true, reply_buf, reply_len); goto out; } else if (ret) { goto out; }
out: mutex_unlock(&ac->mutex); return ret;
bad: pr_err("failed to decode auth msg\n"); ret = -EINVAL; goto out;}
int ceph_build_auth(struct ceph_auth_client *ac, void *msg_buf, size_t msg_len){ int ret = 0;
mutex_lock(&ac->mutex); if (ac->ops->should_authenticate(ac)) ret = build_request(ac, true, msg_buf, msg_len); mutex_unlock(&ac->mutex); return ret;}
int ceph_auth_is_authenticated(struct ceph_auth_client *ac){ int ret = 0;
mutex_lock(&ac->mutex); if (ac->ops) ret = ac->ops->is_authenticated(ac); mutex_unlock(&ac->mutex); return ret;}EXPORT_SYMBOL(ceph_auth_is_authenticated);
int __ceph_auth_get_authorizer(struct ceph_auth_client *ac, struct ceph_auth_handshake *auth, int peer_type, bool force_new, int *proto, int *pref_mode, int *fallb_mode){ int ret;
mutex_lock(&ac->mutex); if (force_new && auth->authorizer) { ceph_auth_destroy_authorizer(auth->authorizer); auth->authorizer = NULL; } if (!auth->authorizer) ret = ac->ops->create_authorizer(ac, peer_type, auth); else if (ac->ops->update_authorizer) ret = ac->ops->update_authorizer(ac, peer_type, auth); else ret = 0; if (ret) goto out;
*proto = ac->protocol; if (pref_mode && fallb_mode) { *pref_mode = ac->preferred_mode; *fallb_mode = ac->fallback_mode; }
out: mutex_unlock(&ac->mutex); return ret;}EXPORT_SYMBOL(__ceph_auth_get_authorizer);
void ceph_auth_destroy_authorizer(struct ceph_authorizer *a){ a->destroy(a);}EXPORT_SYMBOL(ceph_auth_destroy_authorizer);
int ceph_auth_add_authorizer_challenge(struct ceph_auth_client *ac, struct ceph_authorizer *a, void *challenge_buf, int challenge_buf_len){ int ret = 0;
mutex_lock(&ac->mutex); if (ac->ops && ac->ops->add_authorizer_challenge) ret = ac->ops->add_authorizer_challenge(ac, a, challenge_buf, challenge_buf_len); mutex_unlock(&ac->mutex); return ret;}EXPORT_SYMBOL(ceph_auth_add_authorizer_challenge);
int ceph_auth_verify_authorizer_reply(struct ceph_auth_client *ac, struct ceph_authorizer *a, void *reply, int reply_len, u8 *session_key, int *session_key_len, u8 *con_secret, int *con_secret_len){ int ret = 0;
mutex_lock(&ac->mutex); if (ac->ops && ac->ops->verify_authorizer_reply) ret = ac->ops->verify_authorizer_reply(ac, a, reply, reply_len, session_key, session_key_len, con_secret, con_secret_len); mutex_unlock(&ac->mutex); return ret;}EXPORT_SYMBOL(ceph_auth_verify_authorizer_reply);
void ceph_auth_invalidate_authorizer(struct ceph_auth_client *ac, int peer_type){ mutex_lock(&ac->mutex); if (ac->ops && ac->ops->invalidate_authorizer) ac->ops->invalidate_authorizer(ac, peer_type); mutex_unlock(&ac->mutex);}EXPORT_SYMBOL(ceph_auth_invalidate_authorizer);
/* * msgr2 authentication */
static bool contains(const int *arr, int cnt, int val){ int i;
for (i = 0; i < cnt; i++) { if (arr[i] == val) return true; }
return false;}
static int encode_con_modes(void **p, void *end, int pref_mode, int fallb_mode){ WARN_ON(pref_mode == CEPH_CON_MODE_UNKNOWN); if (fallb_mode != CEPH_CON_MODE_UNKNOWN) { ceph_encode_32_safe(p, end, 2, e_range); ceph_encode_32_safe(p, end, pref_mode, e_range); ceph_encode_32_safe(p, end, fallb_mode, e_range); } else { ceph_encode_32_safe(p, end, 1, e_range); ceph_encode_32_safe(p, end, pref_mode, e_range); }
return 0;
e_range: return -ERANGE;}
/* * Similar to ceph_auth_build_hello(). */int ceph_auth_get_request(struct ceph_auth_client *ac, void *buf, int buf_len){ int proto = ac->key ? CEPH_AUTH_CEPHX : CEPH_AUTH_NONE; void *end = buf + buf_len; void *lenp; void *p; int ret;
mutex_lock(&ac->mutex); if (ac->protocol == CEPH_AUTH_UNKNOWN) { ret = init_protocol(ac, proto); if (ret) { pr_err("auth protocol '%s' init failed: %d\n", ceph_auth_proto_name(proto), ret); goto out; } } else { WARN_ON(ac->protocol != proto); ac->ops->reset(ac); }
p = buf; ceph_encode_32_safe(&p, end, ac->protocol, e_range); ret = encode_con_modes(&p, end, ac->preferred_mode, ac->fallback_mode); if (ret) goto out;
lenp = p; p += 4; /* space for len */
ceph_encode_8_safe(&p, end, CEPH_AUTH_MODE_MON, e_range); ret = ceph_auth_entity_name_encode(ac->name, &p, end); if (ret) goto out;
ceph_encode_64_safe(&p, end, ac->global_id, e_range); ceph_encode_32(&lenp, p - lenp - 4); ret = p - buf;
out: mutex_unlock(&ac->mutex); return ret;
e_range: ret = -ERANGE; goto out;}
int ceph_auth_handle_reply_more(struct ceph_auth_client *ac, void *reply, int reply_len, void *buf, int buf_len){ int ret;
mutex_lock(&ac->mutex); ret = ac->ops->handle_reply(ac, 0, reply, reply + reply_len, NULL, NULL, NULL, NULL); if (ret == -EAGAIN) ret = build_request(ac, false, buf, buf_len); else WARN_ON(ret >= 0); mutex_unlock(&ac->mutex); return ret;}
int ceph_auth_handle_reply_done(struct ceph_auth_client *ac, u64 global_id, void *reply, int reply_len, u8 *session_key, int *session_key_len, u8 *con_secret, int *con_secret_len){ int ret;
mutex_lock(&ac->mutex); ret = ac->ops->handle_reply(ac, global_id, reply, reply + reply_len, session_key, session_key_len, con_secret, con_secret_len); WARN_ON(ret == -EAGAIN || ret > 0); mutex_unlock(&ac->mutex); return ret;}
bool ceph_auth_handle_bad_method(struct ceph_auth_client *ac, int used_proto, int result, const int *allowed_protos, int proto_cnt, const int *allowed_modes, int mode_cnt){ mutex_lock(&ac->mutex); WARN_ON(used_proto != ac->protocol);
if (result == -EOPNOTSUPP) { if (!contains(allowed_protos, proto_cnt, ac->protocol)) { pr_err("auth protocol '%s' not allowed\n", ceph_auth_proto_name(ac->protocol)); goto not_allowed; } if (!contains(allowed_modes, mode_cnt, ac->preferred_mode) && (ac->fallback_mode == CEPH_CON_MODE_UNKNOWN || !contains(allowed_modes, mode_cnt, ac->fallback_mode))) { pr_err("preferred mode '%s' not allowed\n", ceph_con_mode_name(ac->preferred_mode)); if (ac->fallback_mode == CEPH_CON_MODE_UNKNOWN) pr_err("no fallback mode\n"); else pr_err("fallback mode '%s' not allowed\n", ceph_con_mode_name(ac->fallback_mode)); goto not_allowed; } }
WARN_ON(result == -EOPNOTSUPP || result >= 0); pr_err("auth protocol '%s' msgr authentication failed: %d\n", ceph_auth_proto_name(ac->protocol), result);
mutex_unlock(&ac->mutex); return true;
not_allowed: mutex_unlock(&ac->mutex); return false;}
int ceph_auth_get_authorizer(struct ceph_auth_client *ac, struct ceph_auth_handshake *auth, int peer_type, void *buf, int *buf_len){ void *end = buf + *buf_len; int pref_mode, fallb_mode; int proto; void *p; int ret;
ret = __ceph_auth_get_authorizer(ac, auth, peer_type, true, &proto, &pref_mode, &fallb_mode); if (ret) return ret;
p = buf; ceph_encode_32_safe(&p, end, proto, e_range); ret = encode_con_modes(&p, end, pref_mode, fallb_mode); if (ret) return ret;
ceph_encode_32_safe(&p, end, auth->authorizer_buf_len, e_range); *buf_len = p - buf; return 0;
e_range: return -ERANGE;}EXPORT_SYMBOL(ceph_auth_get_authorizer);
int ceph_auth_handle_svc_reply_more(struct ceph_auth_client *ac, struct ceph_auth_handshake *auth, void *reply, int reply_len, void *buf, int *buf_len){ void *end = buf + *buf_len; void *p; int ret;
ret = ceph_auth_add_authorizer_challenge(ac, auth->authorizer, reply, reply_len); if (ret) return ret;
p = buf; ceph_encode_32_safe(&p, end, auth->authorizer_buf_len, e_range); *buf_len = p - buf; return 0;
e_range: return -ERANGE;}EXPORT_SYMBOL(ceph_auth_handle_svc_reply_more);
int ceph_auth_handle_svc_reply_done(struct ceph_auth_client *ac, struct ceph_auth_handshake *auth, void *reply, int reply_len, u8 *session_key, int *session_key_len, u8 *con_secret, int *con_secret_len){ return ceph_auth_verify_authorizer_reply(ac, auth->authorizer, reply, reply_len, session_key, session_key_len, con_secret, con_secret_len);}EXPORT_SYMBOL(ceph_auth_handle_svc_reply_done);
bool ceph_auth_handle_bad_authorizer(struct ceph_auth_client *ac, int peer_type, int used_proto, int result, const int *allowed_protos, int proto_cnt, const int *allowed_modes, int mode_cnt){ mutex_lock(&ac->mutex); WARN_ON(used_proto != ac->protocol);
if (result == -EOPNOTSUPP) { if (!contains(allowed_protos, proto_cnt, ac->protocol)) { pr_err("auth protocol '%s' not allowed by %s\n", ceph_auth_proto_name(ac->protocol), ceph_entity_type_name(peer_type)); goto not_allowed; } if (!contains(allowed_modes, mode_cnt, ac->preferred_mode) && (ac->fallback_mode == CEPH_CON_MODE_UNKNOWN || !contains(allowed_modes, mode_cnt, ac->fallback_mode))) { pr_err("preferred mode '%s' not allowed by %s\n", ceph_con_mode_name(ac->preferred_mode), ceph_entity_type_name(peer_type)); if (ac->fallback_mode == CEPH_CON_MODE_UNKNOWN) pr_err("no fallback mode\n"); else pr_err("fallback mode '%s' not allowed by %s\n", ceph_con_mode_name(ac->fallback_mode), ceph_entity_type_name(peer_type)); goto not_allowed; } }
WARN_ON(result == -EOPNOTSUPP || result >= 0); pr_err("auth protocol '%s' authorization to %s failed: %d\n", ceph_auth_proto_name(ac->protocol), ceph_entity_type_name(peer_type), result);
if (ac->ops->invalidate_authorizer) ac->ops->invalidate_authorizer(ac, peer_type);
mutex_unlock(&ac->mutex); return true;
not_allowed: mutex_unlock(&ac->mutex); return false;}EXPORT_SYMBOL(ceph_auth_handle_bad_authorizer);