linux/net/ceph/ceph_common.c
Linus Torvalds 028db3e290 Revert "Merge tag 'keys-acl-20190703' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs"
This reverts merge 0f75ef6a9c (and thus
effectively commits

   7a1ade8475 ("keys: Provide KEYCTL_GRANT_PERMISSION")
   2e12256b9a ("keys: Replace uid/gid/perm permissions checking with an ACL")

that the merge brought in).

It turns out that it breaks booting with an encrypted volume, and Eric
biggers reports that it also breaks the fscrypt tests [1] and loading of
in-kernel X.509 certificates [2].

The root cause of all the breakage is likely the same, but David Howells
is off email so rather than try to work it out it's getting reverted in
order to not impact the rest of the merge window.

 [1] https://lore.kernel.org/lkml/20190710011559.GA7973@sol.localdomain/
 [2] https://lore.kernel.org/lkml/20190710013225.GB7973@sol.localdomain/

Link: https://lore.kernel.org/lkml/CAHk-=wjxoeMJfeBahnWH=9zShKp2bsVy527vo3_y8HfOdhwAAw@mail.gmail.com/
Reported-by: Eric Biggers <ebiggers@kernel.org>
Cc: David Howells <dhowells@redhat.com>
Cc: James Morris <jmorris@namei.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-07-10 18:43:43 -07:00

826 lines
20 KiB
C

// SPDX-License-Identifier: GPL-2.0-only
#include <linux/ceph/ceph_debug.h>
#include <linux/backing-dev.h>
#include <linux/ctype.h>
#include <linux/fs.h>
#include <linux/inet.h>
#include <linux/in6.h>
#include <linux/key.h>
#include <keys/ceph-type.h>
#include <linux/module.h>
#include <linux/mount.h>
#include <linux/nsproxy.h>
#include <linux/parser.h>
#include <linux/sched.h>
#include <linux/seq_file.h>
#include <linux/slab.h>
#include <linux/statfs.h>
#include <linux/string.h>
#include <linux/vmalloc.h>
#include <linux/ceph/ceph_features.h>
#include <linux/ceph/libceph.h>
#include <linux/ceph/debugfs.h>
#include <linux/ceph/decode.h>
#include <linux/ceph/mon_client.h>
#include <linux/ceph/auth.h>
#include "crypto.h"
/*
* Module compatibility interface. For now it doesn't do anything,
* but its existence signals a certain level of functionality.
*
* The data buffer is used to pass information both to and from
* libceph. The return value indicates whether libceph determines
* it is compatible with the caller (from another kernel module),
* given the provided data.
*
* The data pointer can be null.
*/
bool libceph_compatible(void *data)
{
return true;
}
EXPORT_SYMBOL(libceph_compatible);
static int param_get_supported_features(char *buffer,
const struct kernel_param *kp)
{
return sprintf(buffer, "0x%llx", CEPH_FEATURES_SUPPORTED_DEFAULT);
}
static const struct kernel_param_ops param_ops_supported_features = {
.get = param_get_supported_features,
};
module_param_cb(supported_features, &param_ops_supported_features, NULL,
0444);
const char *ceph_msg_type_name(int type)
{
switch (type) {
case CEPH_MSG_SHUTDOWN: return "shutdown";
case CEPH_MSG_PING: return "ping";
case CEPH_MSG_AUTH: return "auth";
case CEPH_MSG_AUTH_REPLY: return "auth_reply";
case CEPH_MSG_MON_MAP: return "mon_map";
case CEPH_MSG_MON_GET_MAP: return "mon_get_map";
case CEPH_MSG_MON_SUBSCRIBE: return "mon_subscribe";
case CEPH_MSG_MON_SUBSCRIBE_ACK: return "mon_subscribe_ack";
case CEPH_MSG_STATFS: return "statfs";
case CEPH_MSG_STATFS_REPLY: return "statfs_reply";
case CEPH_MSG_MON_GET_VERSION: return "mon_get_version";
case CEPH_MSG_MON_GET_VERSION_REPLY: return "mon_get_version_reply";
case CEPH_MSG_MDS_MAP: return "mds_map";
case CEPH_MSG_FS_MAP_USER: return "fs_map_user";
case CEPH_MSG_CLIENT_SESSION: return "client_session";
case CEPH_MSG_CLIENT_RECONNECT: return "client_reconnect";
case CEPH_MSG_CLIENT_REQUEST: return "client_request";
case CEPH_MSG_CLIENT_REQUEST_FORWARD: return "client_request_forward";
case CEPH_MSG_CLIENT_REPLY: return "client_reply";
case CEPH_MSG_CLIENT_CAPS: return "client_caps";
case CEPH_MSG_CLIENT_CAPRELEASE: return "client_cap_release";
case CEPH_MSG_CLIENT_QUOTA: return "client_quota";
case CEPH_MSG_CLIENT_SNAP: return "client_snap";
case CEPH_MSG_CLIENT_LEASE: return "client_lease";
case CEPH_MSG_POOLOP_REPLY: return "poolop_reply";
case CEPH_MSG_POOLOP: return "poolop";
case CEPH_MSG_MON_COMMAND: return "mon_command";
case CEPH_MSG_MON_COMMAND_ACK: return "mon_command_ack";
case CEPH_MSG_OSD_MAP: return "osd_map";
case CEPH_MSG_OSD_OP: return "osd_op";
case CEPH_MSG_OSD_OPREPLY: return "osd_opreply";
case CEPH_MSG_WATCH_NOTIFY: return "watch_notify";
case CEPH_MSG_OSD_BACKOFF: return "osd_backoff";
default: return "unknown";
}
}
EXPORT_SYMBOL(ceph_msg_type_name);
/*
* Initially learn our fsid, or verify an fsid matches.
*/
int ceph_check_fsid(struct ceph_client *client, struct ceph_fsid *fsid)
{
if (client->have_fsid) {
if (ceph_fsid_compare(&client->fsid, fsid)) {
pr_err("bad fsid, had %pU got %pU",
&client->fsid, fsid);
return -1;
}
} else {
memcpy(&client->fsid, fsid, sizeof(*fsid));
}
return 0;
}
EXPORT_SYMBOL(ceph_check_fsid);
static int strcmp_null(const char *s1, const char *s2)
{
if (!s1 && !s2)
return 0;
if (s1 && !s2)
return -1;
if (!s1 && s2)
return 1;
return strcmp(s1, s2);
}
int ceph_compare_options(struct ceph_options *new_opt,
struct ceph_client *client)
{
struct ceph_options *opt1 = new_opt;
struct ceph_options *opt2 = client->options;
int ofs = offsetof(struct ceph_options, mon_addr);
int i;
int ret;
/*
* Don't bother comparing options if network namespaces don't
* match.
*/
if (!net_eq(current->nsproxy->net_ns, read_pnet(&client->msgr.net)))
return -1;
ret = memcmp(opt1, opt2, ofs);
if (ret)
return ret;
ret = strcmp_null(opt1->name, opt2->name);
if (ret)
return ret;
if (opt1->key && !opt2->key)
return -1;
if (!opt1->key && opt2->key)
return 1;
if (opt1->key && opt2->key) {
if (opt1->key->type != opt2->key->type)
return -1;
if (opt1->key->created.tv_sec != opt2->key->created.tv_sec)
return -1;
if (opt1->key->created.tv_nsec != opt2->key->created.tv_nsec)
return -1;
if (opt1->key->len != opt2->key->len)
return -1;
if (opt1->key->key && !opt2->key->key)
return -1;
if (!opt1->key->key && opt2->key->key)
return 1;
if (opt1->key->key && opt2->key->key) {
ret = memcmp(opt1->key->key, opt2->key->key, opt1->key->len);
if (ret)
return ret;
}
}
/* any matching mon ip implies a match */
for (i = 0; i < opt1->num_mon; i++) {
if (ceph_monmap_contains(client->monc.monmap,
&opt1->mon_addr[i]))
return 0;
}
return -1;
}
EXPORT_SYMBOL(ceph_compare_options);
void *ceph_kvmalloc(size_t size, gfp_t flags)
{
if (size <= (PAGE_SIZE << PAGE_ALLOC_COSTLY_ORDER)) {
void *ptr = kmalloc(size, flags | __GFP_NOWARN);
if (ptr)
return ptr;
}
return __vmalloc(size, flags, PAGE_KERNEL);
}
static int parse_fsid(const char *str, struct ceph_fsid *fsid)
{
int i = 0;
char tmp[3];
int err = -EINVAL;
int d;
dout("parse_fsid '%s'\n", str);
tmp[2] = 0;
while (*str && i < 16) {
if (ispunct(*str)) {
str++;
continue;
}
if (!isxdigit(str[0]) || !isxdigit(str[1]))
break;
tmp[0] = str[0];
tmp[1] = str[1];
if (sscanf(tmp, "%x", &d) < 1)
break;
fsid->fsid[i] = d & 0xff;
i++;
str += 2;
}
if (i == 16)
err = 0;
dout("parse_fsid ret %d got fsid %pU\n", err, fsid);
return err;
}
/*
* ceph options
*/
enum {
Opt_osdtimeout,
Opt_osdkeepalivetimeout,
Opt_mount_timeout,
Opt_osd_idle_ttl,
Opt_osd_request_timeout,
Opt_last_int,
/* int args above */
Opt_fsid,
Opt_name,
Opt_secret,
Opt_key,
Opt_ip,
Opt_last_string,
/* string args above */
Opt_share,
Opt_noshare,
Opt_crc,
Opt_nocrc,
Opt_cephx_require_signatures,
Opt_nocephx_require_signatures,
Opt_cephx_sign_messages,
Opt_nocephx_sign_messages,
Opt_tcp_nodelay,
Opt_notcp_nodelay,
Opt_abort_on_full,
};
static match_table_t opt_tokens = {
{Opt_osdtimeout, "osdtimeout=%d"},
{Opt_osdkeepalivetimeout, "osdkeepalive=%d"},
{Opt_mount_timeout, "mount_timeout=%d"},
{Opt_osd_idle_ttl, "osd_idle_ttl=%d"},
{Opt_osd_request_timeout, "osd_request_timeout=%d"},
/* int args above */
{Opt_fsid, "fsid=%s"},
{Opt_name, "name=%s"},
{Opt_secret, "secret=%s"},
{Opt_key, "key=%s"},
{Opt_ip, "ip=%s"},
/* string args above */
{Opt_share, "share"},
{Opt_noshare, "noshare"},
{Opt_crc, "crc"},
{Opt_nocrc, "nocrc"},
{Opt_cephx_require_signatures, "cephx_require_signatures"},
{Opt_nocephx_require_signatures, "nocephx_require_signatures"},
{Opt_cephx_sign_messages, "cephx_sign_messages"},
{Opt_nocephx_sign_messages, "nocephx_sign_messages"},
{Opt_tcp_nodelay, "tcp_nodelay"},
{Opt_notcp_nodelay, "notcp_nodelay"},
{Opt_abort_on_full, "abort_on_full"},
{-1, NULL}
};
void ceph_destroy_options(struct ceph_options *opt)
{
dout("destroy_options %p\n", opt);
kfree(opt->name);
if (opt->key) {
ceph_crypto_key_destroy(opt->key);
kfree(opt->key);
}
kfree(opt->mon_addr);
kfree(opt);
}
EXPORT_SYMBOL(ceph_destroy_options);
/* get secret from key store */
static int get_secret(struct ceph_crypto_key *dst, const char *name) {
struct key *ukey;
int key_err;
int err = 0;
struct ceph_crypto_key *ckey;
ukey = request_key(&key_type_ceph, name, NULL);
if (IS_ERR(ukey)) {
/* request_key errors don't map nicely to mount(2)
errors; don't even try, but still printk */
key_err = PTR_ERR(ukey);
switch (key_err) {
case -ENOKEY:
pr_warn("ceph: Mount failed due to key not found: %s\n",
name);
break;
case -EKEYEXPIRED:
pr_warn("ceph: Mount failed due to expired key: %s\n",
name);
break;
case -EKEYREVOKED:
pr_warn("ceph: Mount failed due to revoked key: %s\n",
name);
break;
default:
pr_warn("ceph: Mount failed due to unknown key error %d: %s\n",
key_err, name);
}
err = -EPERM;
goto out;
}
ckey = ukey->payload.data[0];
err = ceph_crypto_key_clone(dst, ckey);
if (err)
goto out_key;
/* pass through, err is 0 */
out_key:
key_put(ukey);
out:
return err;
}
struct ceph_options *
ceph_parse_options(char *options, const char *dev_name,
const char *dev_name_end,
int (*parse_extra_token)(char *c, void *private),
void *private)
{
struct ceph_options *opt;
const char *c;
int err = -ENOMEM;
substring_t argstr[MAX_OPT_ARGS];
opt = kzalloc(sizeof(*opt), GFP_KERNEL);
if (!opt)
return ERR_PTR(-ENOMEM);
opt->mon_addr = kcalloc(CEPH_MAX_MON, sizeof(*opt->mon_addr),
GFP_KERNEL);
if (!opt->mon_addr)
goto out;
dout("parse_options %p options '%s' dev_name '%s'\n", opt, options,
dev_name);
/* start with defaults */
opt->flags = CEPH_OPT_DEFAULT;
opt->osd_keepalive_timeout = CEPH_OSD_KEEPALIVE_DEFAULT;
opt->mount_timeout = CEPH_MOUNT_TIMEOUT_DEFAULT;
opt->osd_idle_ttl = CEPH_OSD_IDLE_TTL_DEFAULT;
opt->osd_request_timeout = CEPH_OSD_REQUEST_TIMEOUT_DEFAULT;
/* get mon ip(s) */
/* ip1[:port1][,ip2[:port2]...] */
err = ceph_parse_ips(dev_name, dev_name_end, opt->mon_addr,
CEPH_MAX_MON, &opt->num_mon);
if (err < 0)
goto out;
/* parse mount options */
while ((c = strsep(&options, ",")) != NULL) {
int token, intval;
if (!*c)
continue;
err = -EINVAL;
token = match_token((char *)c, opt_tokens, argstr);
if (token < 0 && parse_extra_token) {
/* extra? */
err = parse_extra_token((char *)c, private);
if (err < 0) {
pr_err("bad option at '%s'\n", c);
goto out;
}
continue;
}
if (token < Opt_last_int) {
err = match_int(&argstr[0], &intval);
if (err < 0) {
pr_err("bad option arg (not int) at '%s'\n", c);
goto out;
}
dout("got int token %d val %d\n", token, intval);
} else if (token > Opt_last_int && token < Opt_last_string) {
dout("got string token %d val %s\n", token,
argstr[0].from);
} else {
dout("got token %d\n", token);
}
switch (token) {
case Opt_ip:
err = ceph_parse_ips(argstr[0].from,
argstr[0].to,
&opt->my_addr,
1, NULL);
if (err < 0)
goto out;
opt->flags |= CEPH_OPT_MYIP;
break;
case Opt_fsid:
err = parse_fsid(argstr[0].from, &opt->fsid);
if (err == 0)
opt->flags |= CEPH_OPT_FSID;
break;
case Opt_name:
kfree(opt->name);
opt->name = kstrndup(argstr[0].from,
argstr[0].to-argstr[0].from,
GFP_KERNEL);
if (!opt->name) {
err = -ENOMEM;
goto out;
}
break;
case Opt_secret:
ceph_crypto_key_destroy(opt->key);
kfree(opt->key);
opt->key = kzalloc(sizeof(*opt->key), GFP_KERNEL);
if (!opt->key) {
err = -ENOMEM;
goto out;
}
err = ceph_crypto_key_unarmor(opt->key, argstr[0].from);
if (err < 0)
goto out;
break;
case Opt_key:
ceph_crypto_key_destroy(opt->key);
kfree(opt->key);
opt->key = kzalloc(sizeof(*opt->key), GFP_KERNEL);
if (!opt->key) {
err = -ENOMEM;
goto out;
}
err = get_secret(opt->key, argstr[0].from);
if (err < 0)
goto out;
break;
/* misc */
case Opt_osdtimeout:
pr_warn("ignoring deprecated osdtimeout option\n");
break;
case Opt_osdkeepalivetimeout:
/* 0 isn't well defined right now, reject it */
if (intval < 1 || intval > INT_MAX / 1000) {
pr_err("osdkeepalive out of range\n");
err = -EINVAL;
goto out;
}
opt->osd_keepalive_timeout =
msecs_to_jiffies(intval * 1000);
break;
case Opt_osd_idle_ttl:
/* 0 isn't well defined right now, reject it */
if (intval < 1 || intval > INT_MAX / 1000) {
pr_err("osd_idle_ttl out of range\n");
err = -EINVAL;
goto out;
}
opt->osd_idle_ttl = msecs_to_jiffies(intval * 1000);
break;
case Opt_mount_timeout:
/* 0 is "wait forever" (i.e. infinite timeout) */
if (intval < 0 || intval > INT_MAX / 1000) {
pr_err("mount_timeout out of range\n");
err = -EINVAL;
goto out;
}
opt->mount_timeout = msecs_to_jiffies(intval * 1000);
break;
case Opt_osd_request_timeout:
/* 0 is "wait forever" (i.e. infinite timeout) */
if (intval < 0 || intval > INT_MAX / 1000) {
pr_err("osd_request_timeout out of range\n");
err = -EINVAL;
goto out;
}
opt->osd_request_timeout = msecs_to_jiffies(intval * 1000);
break;
case Opt_share:
opt->flags &= ~CEPH_OPT_NOSHARE;
break;
case Opt_noshare:
opt->flags |= CEPH_OPT_NOSHARE;
break;
case Opt_crc:
opt->flags &= ~CEPH_OPT_NOCRC;
break;
case Opt_nocrc:
opt->flags |= CEPH_OPT_NOCRC;
break;
case Opt_cephx_require_signatures:
opt->flags &= ~CEPH_OPT_NOMSGAUTH;
break;
case Opt_nocephx_require_signatures:
opt->flags |= CEPH_OPT_NOMSGAUTH;
break;
case Opt_cephx_sign_messages:
opt->flags &= ~CEPH_OPT_NOMSGSIGN;
break;
case Opt_nocephx_sign_messages:
opt->flags |= CEPH_OPT_NOMSGSIGN;
break;
case Opt_tcp_nodelay:
opt->flags |= CEPH_OPT_TCP_NODELAY;
break;
case Opt_notcp_nodelay:
opt->flags &= ~CEPH_OPT_TCP_NODELAY;
break;
case Opt_abort_on_full:
opt->flags |= CEPH_OPT_ABORT_ON_FULL;
break;
default:
BUG_ON(token);
}
}
/* success */
return opt;
out:
ceph_destroy_options(opt);
return ERR_PTR(err);
}
EXPORT_SYMBOL(ceph_parse_options);
int ceph_print_client_options(struct seq_file *m, struct ceph_client *client,
bool show_all)
{
struct ceph_options *opt = client->options;
size_t pos = m->count;
if (opt->name) {
seq_puts(m, "name=");
seq_escape(m, opt->name, ", \t\n\\");
seq_putc(m, ',');
}
if (opt->key)
seq_puts(m, "secret=<hidden>,");
if (opt->flags & CEPH_OPT_FSID)
seq_printf(m, "fsid=%pU,", &opt->fsid);
if (opt->flags & CEPH_OPT_NOSHARE)
seq_puts(m, "noshare,");
if (opt->flags & CEPH_OPT_NOCRC)
seq_puts(m, "nocrc,");
if (opt->flags & CEPH_OPT_NOMSGAUTH)
seq_puts(m, "nocephx_require_signatures,");
if (opt->flags & CEPH_OPT_NOMSGSIGN)
seq_puts(m, "nocephx_sign_messages,");
if ((opt->flags & CEPH_OPT_TCP_NODELAY) == 0)
seq_puts(m, "notcp_nodelay,");
if (show_all && (opt->flags & CEPH_OPT_ABORT_ON_FULL))
seq_puts(m, "abort_on_full,");
if (opt->mount_timeout != CEPH_MOUNT_TIMEOUT_DEFAULT)
seq_printf(m, "mount_timeout=%d,",
jiffies_to_msecs(opt->mount_timeout) / 1000);
if (opt->osd_idle_ttl != CEPH_OSD_IDLE_TTL_DEFAULT)
seq_printf(m, "osd_idle_ttl=%d,",
jiffies_to_msecs(opt->osd_idle_ttl) / 1000);
if (opt->osd_keepalive_timeout != CEPH_OSD_KEEPALIVE_DEFAULT)
seq_printf(m, "osdkeepalivetimeout=%d,",
jiffies_to_msecs(opt->osd_keepalive_timeout) / 1000);
if (opt->osd_request_timeout != CEPH_OSD_REQUEST_TIMEOUT_DEFAULT)
seq_printf(m, "osd_request_timeout=%d,",
jiffies_to_msecs(opt->osd_request_timeout) / 1000);
/* drop redundant comma */
if (m->count != pos)
m->count--;
return 0;
}
EXPORT_SYMBOL(ceph_print_client_options);
struct ceph_entity_addr *ceph_client_addr(struct ceph_client *client)
{
return &client->msgr.inst.addr;
}
EXPORT_SYMBOL(ceph_client_addr);
u64 ceph_client_gid(struct ceph_client *client)
{
return client->monc.auth->global_id;
}
EXPORT_SYMBOL(ceph_client_gid);
/*
* create a fresh client instance
*/
struct ceph_client *ceph_create_client(struct ceph_options *opt, void *private)
{
struct ceph_client *client;
struct ceph_entity_addr *myaddr = NULL;
int err;
err = wait_for_random_bytes();
if (err < 0)
return ERR_PTR(err);
client = kzalloc(sizeof(*client), GFP_KERNEL);
if (client == NULL)
return ERR_PTR(-ENOMEM);
client->private = private;
client->options = opt;
mutex_init(&client->mount_mutex);
init_waitqueue_head(&client->auth_wq);
client->auth_err = 0;
client->extra_mon_dispatch = NULL;
client->supported_features = CEPH_FEATURES_SUPPORTED_DEFAULT;
client->required_features = CEPH_FEATURES_REQUIRED_DEFAULT;
if (!ceph_test_opt(client, NOMSGAUTH))
client->required_features |= CEPH_FEATURE_MSG_AUTH;
/* msgr */
if (ceph_test_opt(client, MYIP))
myaddr = &client->options->my_addr;
ceph_messenger_init(&client->msgr, myaddr);
/* subsystems */
err = ceph_monc_init(&client->monc, client);
if (err < 0)
goto fail;
err = ceph_osdc_init(&client->osdc, client);
if (err < 0)
goto fail_monc;
return client;
fail_monc:
ceph_monc_stop(&client->monc);
fail:
ceph_messenger_fini(&client->msgr);
kfree(client);
return ERR_PTR(err);
}
EXPORT_SYMBOL(ceph_create_client);
void ceph_destroy_client(struct ceph_client *client)
{
dout("destroy_client %p\n", client);
atomic_set(&client->msgr.stopping, 1);
/* unmount */
ceph_osdc_stop(&client->osdc);
ceph_monc_stop(&client->monc);
ceph_messenger_fini(&client->msgr);
ceph_debugfs_client_cleanup(client);
ceph_destroy_options(client->options);
kfree(client);
dout("destroy_client %p done\n", client);
}
EXPORT_SYMBOL(ceph_destroy_client);
/*
* true if we have the mon map (and have thus joined the cluster)
*/
static bool have_mon_and_osd_map(struct ceph_client *client)
{
return client->monc.monmap && client->monc.monmap->epoch &&
client->osdc.osdmap && client->osdc.osdmap->epoch;
}
/*
* mount: join the ceph cluster, and open root directory.
*/
int __ceph_open_session(struct ceph_client *client, unsigned long started)
{
unsigned long timeout = client->options->mount_timeout;
long err;
/* open session, and wait for mon and osd maps */
err = ceph_monc_open_session(&client->monc);
if (err < 0)
return err;
while (!have_mon_and_osd_map(client)) {
if (timeout && time_after_eq(jiffies, started + timeout))
return -ETIMEDOUT;
/* wait */
dout("mount waiting for mon_map\n");
err = wait_event_interruptible_timeout(client->auth_wq,
have_mon_and_osd_map(client) || (client->auth_err < 0),
ceph_timeout_jiffies(timeout));
if (err < 0)
return err;
if (client->auth_err < 0)
return client->auth_err;
}
pr_info("client%llu fsid %pU\n", ceph_client_gid(client),
&client->fsid);
ceph_debugfs_client_init(client);
return 0;
}
EXPORT_SYMBOL(__ceph_open_session);
int ceph_open_session(struct ceph_client *client)
{
int ret;
unsigned long started = jiffies; /* note the start time */
dout("open_session start\n");
mutex_lock(&client->mount_mutex);
ret = __ceph_open_session(client, started);
mutex_unlock(&client->mount_mutex);
return ret;
}
EXPORT_SYMBOL(ceph_open_session);
int ceph_wait_for_latest_osdmap(struct ceph_client *client,
unsigned long timeout)
{
u64 newest_epoch;
int ret;
ret = ceph_monc_get_version(&client->monc, "osdmap", &newest_epoch);
if (ret)
return ret;
if (client->osdc.osdmap->epoch >= newest_epoch)
return 0;
ceph_osdc_maybe_request_map(&client->osdc);
return ceph_monc_wait_osdmap(&client->monc, newest_epoch, timeout);
}
EXPORT_SYMBOL(ceph_wait_for_latest_osdmap);
static int __init init_ceph_lib(void)
{
int ret = 0;
ceph_debugfs_init();
ret = ceph_crypto_init();
if (ret < 0)
goto out_debugfs;
ret = ceph_msgr_init();
if (ret < 0)
goto out_crypto;
ret = ceph_osdc_setup();
if (ret < 0)
goto out_msgr;
pr_info("loaded (mon/osd proto %d/%d)\n",
CEPH_MONC_PROTOCOL, CEPH_OSDC_PROTOCOL);
return 0;
out_msgr:
ceph_msgr_exit();
out_crypto:
ceph_crypto_shutdown();
out_debugfs:
ceph_debugfs_cleanup();
return ret;
}
static void __exit exit_ceph_lib(void)
{
dout("exit_ceph_lib\n");
WARN_ON(!ceph_strings_empty());
ceph_osdc_cleanup();
ceph_msgr_exit();
ceph_crypto_shutdown();
ceph_debugfs_cleanup();
}
module_init(init_ceph_lib);
module_exit(exit_ceph_lib);
MODULE_AUTHOR("Sage Weil <sage@newdream.net>");
MODULE_AUTHOR("Yehuda Sadeh <yehuda@hq.newdream.net>");
MODULE_AUTHOR("Patience Warnick <patience@newdream.net>");
MODULE_DESCRIPTION("Ceph core library");
MODULE_LICENSE("GPL");