linux-stable/net/ceph/ceph_common.c

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#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,
S_IRUGO);
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_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_SNAP: return "client_snap";
case CEPH_MSG_CLIENT_LEASE: return "client_lease";
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", 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,
};
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"},
{-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 (!ukey || 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, ret;
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) {
ret = match_int(&argstr[0], &intval);
if (ret < 0) {
pr_err("bad mount option arg (not int) "
"at '%s'\n", c);
continue;
}
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;
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)
{
struct ceph_options *opt = client->options;
size_t pos = m->count;
fs: create and use seq_show_option for escaping Many file systems that implement the show_options hook fail to correctly escape their output which could lead to unescaped characters (e.g. new lines) leaking into /proc/mounts and /proc/[pid]/mountinfo files. This could lead to confusion, spoofed entries (resulting in things like systemd issuing false d-bus "mount" notifications), and who knows what else. This looks like it would only be the root user stepping on themselves, but it's possible weird things could happen in containers or in other situations with delegated mount privileges. Here's an example using overlay with setuid fusermount trusting the contents of /proc/mounts (via the /etc/mtab symlink). Imagine the use of "sudo" is something more sneaky: $ BASE="ovl" $ MNT="$BASE/mnt" $ LOW="$BASE/lower" $ UP="$BASE/upper" $ WORK="$BASE/work/ 0 0 none /proc fuse.pwn user_id=1000" $ mkdir -p "$LOW" "$UP" "$WORK" $ sudo mount -t overlay -o "lowerdir=$LOW,upperdir=$UP,workdir=$WORK" none /mnt $ cat /proc/mounts none /root/ovl/mnt overlay rw,relatime,lowerdir=ovl/lower,upperdir=ovl/upper,workdir=ovl/work/ 0 0 none /proc fuse.pwn user_id=1000 0 0 $ fusermount -u /proc $ cat /proc/mounts cat: /proc/mounts: No such file or directory This fixes the problem by adding new seq_show_option and seq_show_option_n helpers, and updating the vulnerable show_option handlers to use them as needed. Some, like SELinux, need to be open coded due to unusual existing escape mechanisms. [akpm@linux-foundation.org: add lost chunk, per Kees] [keescook@chromium.org: seq_show_option should be using const parameters] Signed-off-by: Kees Cook <keescook@chromium.org> Acked-by: Serge Hallyn <serge.hallyn@canonical.com> Acked-by: Jan Kara <jack@suse.com> Acked-by: Paul Moore <paul@paul-moore.com> Cc: J. R. Okajima <hooanon05g@gmail.com> Signed-off-by: Kees Cook <keescook@chromium.org> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-09-04 22:44:57 +00:00
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 (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);
static int __init init_ceph_lib(void)
{
int ret = 0;
ret = ceph_debugfs_init();
if (ret < 0)
goto out;
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();
out:
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");