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WSL2-Linux-Kernel
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WSL2-Linux-Kernel/net/ceph/ceph_common.c

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24 KiB
C
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// 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/fs_parser.h>
#include <linux/sched.h>
#include <linux/sched/mm.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;
}
}
ret = ceph_compare_crush_locs(&opt1->crush_locs, &opt2->crush_locs);
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);
/*
* kvmalloc() doesn't fall back to the vmalloc allocator unless flags are
* compatible with (a superset of) GFP_KERNEL. This is because while the
* actual pages are allocated with the specified flags, the page table pages
* are always allocated with GFP_KERNEL.
*
* ceph_kvmalloc() may be called with GFP_KERNEL, GFP_NOFS or GFP_NOIO.
*/
void *ceph_kvmalloc(size_t size, gfp_t flags)
{
void *p;
if ((flags & (__GFP_IO | __GFP_FS)) == (__GFP_IO | __GFP_FS)) {
p = kvmalloc(size, flags);
} else if ((flags & (__GFP_IO | __GFP_FS)) == __GFP_IO) {
unsigned int nofs_flag = memalloc_nofs_save();
p = kvmalloc(size, GFP_KERNEL);
memalloc_nofs_restore(nofs_flag);
} else {
unsigned int noio_flag = memalloc_noio_save();
p = kvmalloc(size, GFP_KERNEL);
memalloc_noio_restore(noio_flag);
}
return p;
}
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,
/* int args above */
Opt_fsid,
Opt_name,
Opt_secret,
Opt_key,
Opt_ip,
Opt_crush_location,
Opt_read_from_replica,
Opt_ms_mode,
/* string args above */
Opt_share,
Opt_crc,
Opt_cephx_require_signatures,
Opt_cephx_sign_messages,
Opt_tcp_nodelay,
Opt_abort_on_full,
};
enum {
Opt_read_from_replica_no,
Opt_read_from_replica_balance,
Opt_read_from_replica_localize,
};
static const struct constant_table ceph_param_read_from_replica[] = {
{"no", Opt_read_from_replica_no},
{"balance", Opt_read_from_replica_balance},
{"localize", Opt_read_from_replica_localize},
{}
};
enum ceph_ms_mode {
Opt_ms_mode_legacy,
Opt_ms_mode_crc,
Opt_ms_mode_secure,
Opt_ms_mode_prefer_crc,
Opt_ms_mode_prefer_secure
};
static const struct constant_table ceph_param_ms_mode[] = {
{"legacy", Opt_ms_mode_legacy},
{"crc", Opt_ms_mode_crc},
{"secure", Opt_ms_mode_secure},
{"prefer-crc", Opt_ms_mode_prefer_crc},
{"prefer-secure", Opt_ms_mode_prefer_secure},
{}
};
static const struct fs_parameter_spec ceph_parameters[] = {
fsparam_flag ("abort_on_full", Opt_abort_on_full),
fsparam_flag_no ("cephx_require_signatures", Opt_cephx_require_signatures),
fsparam_flag_no ("cephx_sign_messages", Opt_cephx_sign_messages),
fsparam_flag_no ("crc", Opt_crc),
fsparam_string ("crush_location", Opt_crush_location),
fsparam_string ("fsid", Opt_fsid),
fsparam_string ("ip", Opt_ip),
fsparam_string ("key", Opt_key),
fsparam_u32 ("mount_timeout", Opt_mount_timeout),
fsparam_string ("name", Opt_name),
fsparam_u32 ("osd_idle_ttl", Opt_osd_idle_ttl),
fsparam_u32 ("osd_request_timeout", Opt_osd_request_timeout),
fsparam_u32 ("osdkeepalive", Opt_osdkeepalivetimeout),
__fsparam (fs_param_is_s32, "osdtimeout", Opt_osdtimeout,
fs_param_deprecated, NULL),
fsparam_enum ("read_from_replica", Opt_read_from_replica,
ceph_param_read_from_replica),
fsparam_enum ("ms_mode", Opt_ms_mode,
ceph_param_ms_mode),
fsparam_string ("secret", Opt_secret),
fsparam_flag_no ("share", Opt_share),
fsparam_flag_no ("tcp_nodelay", Opt_tcp_nodelay),
{}
};
struct ceph_options *ceph_alloc_options(void)
{
struct ceph_options *opt;
opt = kzalloc(sizeof(*opt), GFP_KERNEL);
if (!opt)
return NULL;
opt->crush_locs = RB_ROOT;
opt->mon_addr = kcalloc(CEPH_MAX_MON, sizeof(*opt->mon_addr),
GFP_KERNEL);
if (!opt->mon_addr) {
kfree(opt);
return NULL;
}
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;
opt->read_from_replica = CEPH_READ_FROM_REPLICA_DEFAULT;
opt->con_modes[0] = CEPH_CON_MODE_UNKNOWN;
opt->con_modes[1] = CEPH_CON_MODE_UNKNOWN;
return opt;
}
EXPORT_SYMBOL(ceph_alloc_options);
void ceph_destroy_options(struct ceph_options *opt)
{
dout("destroy_options %p\n", opt);
if (!opt)
return;
ceph_clear_crush_locs(&opt->crush_locs);
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 p_log *log)
{
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:
error_plog(log, "Failed due to key not found: %s",
name);
break;
case -EKEYEXPIRED:
error_plog(log, "Failed due to expired key: %s",
name);
break;
case -EKEYREVOKED:
error_plog(log, "Failed due to revoked key: %s",
name);
break;
default:
error_plog(log, "Failed due to key error %d: %s",
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;
}
int ceph_parse_mon_ips(const char *buf, size_t len, struct ceph_options *opt,
struct fc_log *l)
{
struct p_log log = {.prefix = "libceph", .log = l};
int ret;
/* ip1[:port1][,ip2[:port2]...] */
ret = ceph_parse_ips(buf, buf + len, opt->mon_addr, CEPH_MAX_MON,
&opt->num_mon);
if (ret) {
error_plog(&log, "Failed to parse monitor IPs: %d", ret);
return ret;
}
return 0;
}
EXPORT_SYMBOL(ceph_parse_mon_ips);
int ceph_parse_param(struct fs_parameter *param, struct ceph_options *opt,
struct fc_log *l)
{
struct fs_parse_result result;
int token, err;
struct p_log log = {.prefix = "libceph", .log = l};
token = __fs_parse(&log, ceph_parameters, param, &result);
dout("%s fs_parse '%s' token %d\n", __func__, param->key, token);
if (token < 0)
return token;
switch (token) {
case Opt_ip:
err = ceph_parse_ips(param->string,
param->string + param->size,
&opt->my_addr,
1, NULL);
if (err) {
error_plog(&log, "Failed to parse ip: %d", err);
return err;
}
opt->flags |= CEPH_OPT_MYIP;
break;
case Opt_fsid:
err = parse_fsid(param->string, &opt->fsid);
if (err) {
error_plog(&log, "Failed to parse fsid: %d", err);
return err;
}
opt->flags |= CEPH_OPT_FSID;
break;
case Opt_name:
kfree(opt->name);
opt->name = param->string;
param->string = NULL;
break;
case Opt_secret:
ceph_crypto_key_destroy(opt->key);
kfree(opt->key);
opt->key = kzalloc(sizeof(*opt->key), GFP_KERNEL);
if (!opt->key)
return -ENOMEM;
err = ceph_crypto_key_unarmor(opt->key, param->string);
if (err) {
error_plog(&log, "Failed to parse secret: %d", err);
return err;
}
break;
case Opt_key:
ceph_crypto_key_destroy(opt->key);
kfree(opt->key);
opt->key = kzalloc(sizeof(*opt->key), GFP_KERNEL);
if (!opt->key)
return -ENOMEM;
return get_secret(opt->key, param->string, &log);
case Opt_crush_location:
ceph_clear_crush_locs(&opt->crush_locs);
err = ceph_parse_crush_location(param->string,
&opt->crush_locs);
if (err) {
error_plog(&log, "Failed to parse CRUSH location: %d",
err);
return err;
}
break;
case Opt_read_from_replica:
switch (result.uint_32) {
case Opt_read_from_replica_no:
opt->read_from_replica = 0;
break;
case Opt_read_from_replica_balance:
opt->read_from_replica = CEPH_OSD_FLAG_BALANCE_READS;
break;
case Opt_read_from_replica_localize:
opt->read_from_replica = CEPH_OSD_FLAG_LOCALIZE_READS;
break;
default:
BUG();
}
break;
case Opt_ms_mode:
switch (result.uint_32) {
case Opt_ms_mode_legacy:
opt->con_modes[0] = CEPH_CON_MODE_UNKNOWN;
opt->con_modes[1] = CEPH_CON_MODE_UNKNOWN;
break;
case Opt_ms_mode_crc:
opt->con_modes[0] = CEPH_CON_MODE_CRC;
opt->con_modes[1] = CEPH_CON_MODE_UNKNOWN;
break;
case Opt_ms_mode_secure:
opt->con_modes[0] = CEPH_CON_MODE_SECURE;
opt->con_modes[1] = CEPH_CON_MODE_UNKNOWN;
break;
case Opt_ms_mode_prefer_crc:
opt->con_modes[0] = CEPH_CON_MODE_CRC;
opt->con_modes[1] = CEPH_CON_MODE_SECURE;
break;
case Opt_ms_mode_prefer_secure:
opt->con_modes[0] = CEPH_CON_MODE_SECURE;
opt->con_modes[1] = CEPH_CON_MODE_CRC;
break;
default:
BUG();
}
break;
case Opt_osdtimeout:
warn_plog(&log, "Ignoring osdtimeout");
break;
case Opt_osdkeepalivetimeout:
/* 0 isn't well defined right now, reject it */
if (result.uint_32 < 1 || result.uint_32 > INT_MAX / 1000)
goto out_of_range;
opt->osd_keepalive_timeout =
msecs_to_jiffies(result.uint_32 * 1000);
break;
case Opt_osd_idle_ttl:
/* 0 isn't well defined right now, reject it */
if (result.uint_32 < 1 || result.uint_32 > INT_MAX / 1000)
goto out_of_range;
opt->osd_idle_ttl = msecs_to_jiffies(result.uint_32 * 1000);
break;
case Opt_mount_timeout:
/* 0 is "wait forever" (i.e. infinite timeout) */
if (result.uint_32 > INT_MAX / 1000)
goto out_of_range;
opt->mount_timeout = msecs_to_jiffies(result.uint_32 * 1000);
break;
case Opt_osd_request_timeout:
/* 0 is "wait forever" (i.e. infinite timeout) */
if (result.uint_32 > INT_MAX / 1000)
goto out_of_range;
opt->osd_request_timeout =
msecs_to_jiffies(result.uint_32 * 1000);
break;
case Opt_share:
if (!result.negated)
opt->flags &= ~CEPH_OPT_NOSHARE;
else
opt->flags |= CEPH_OPT_NOSHARE;
break;
case Opt_crc:
if (!result.negated)
opt->flags &= ~CEPH_OPT_NOCRC;
else
opt->flags |= CEPH_OPT_NOCRC;
break;
case Opt_cephx_require_signatures:
if (!result.negated)
opt->flags &= ~CEPH_OPT_NOMSGAUTH;
else
opt->flags |= CEPH_OPT_NOMSGAUTH;
break;
case Opt_cephx_sign_messages:
if (!result.negated)
opt->flags &= ~CEPH_OPT_NOMSGSIGN;
else
opt->flags |= CEPH_OPT_NOMSGSIGN;
break;
case Opt_tcp_nodelay:
if (!result.negated)
opt->flags |= CEPH_OPT_TCP_NODELAY;
else
opt->flags &= ~CEPH_OPT_TCP_NODELAY;
break;
case Opt_abort_on_full:
opt->flags |= CEPH_OPT_ABORT_ON_FULL;
break;
default:
BUG();
}
return 0;
out_of_range:
return inval_plog(&log, "%s out of range", param->key);
}
EXPORT_SYMBOL(ceph_parse_param);
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;
struct rb_node *n;
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 (!RB_EMPTY_ROOT(&opt->crush_locs)) {
seq_puts(m, "crush_location=");
for (n = rb_first(&opt->crush_locs); ; ) {
struct crush_loc_node *loc =
rb_entry(n, struct crush_loc_node, cl_node);
seq_printf(m, "%s:%s", loc->cl_loc.cl_type_name,
loc->cl_loc.cl_name);
n = rb_next(n);
if (!n)
break;
seq_putc(m, '|');
}
seq_putc(m, ',');
}
if (opt->read_from_replica == CEPH_OSD_FLAG_BALANCE_READS) {
seq_puts(m, "read_from_replica=balance,");
} else if (opt->read_from_replica == CEPH_OSD_FLAG_LOCALIZE_READS) {
seq_puts(m, "read_from_replica=localize,");
}
if (opt->con_modes[0] != CEPH_CON_MODE_UNKNOWN) {
if (opt->con_modes[0] == CEPH_CON_MODE_CRC &&
opt->con_modes[1] == CEPH_CON_MODE_UNKNOWN) {
seq_puts(m, "ms_mode=crc,");
} else if (opt->con_modes[0] == CEPH_CON_MODE_SECURE &&
opt->con_modes[1] == CEPH_CON_MODE_UNKNOWN) {
seq_puts(m, "ms_mode=secure,");
} else if (opt->con_modes[0] == CEPH_CON_MODE_CRC &&
opt->con_modes[1] == CEPH_CON_MODE_SECURE) {
seq_puts(m, "ms_mode=prefer-crc,");
} else if (opt->con_modes[0] == CEPH_CON_MODE_SECURE &&
opt->con_modes[1] == CEPH_CON_MODE_CRC) {
seq_puts(m, "ms_mode=prefer-secure,");
}
}
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);
void ceph_reset_client_addr(struct ceph_client *client)
{
ceph_messenger_reset_nonce(&client->msgr);
ceph_monc_reopen_session(&client->monc);
ceph_osdc_reopen_osds(&client->osdc);
}
EXPORT_SYMBOL(ceph_reset_client_addr);
/*
* 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");
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