[mirror_ubuntu-jammy-kernel.git] / net / ceph / ceph_common.c


#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/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/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 false;
}
EXPORT_SYMBOL(libceph_compatible);

/*
 * find filename portion of a path (/foo/bar/baz -> baz)
 */
const char *ceph_file_part(const char *s, int len)
{
	const char *e = s + len;

	while (e != s && *(e-1) != '/')
		e--;
	return e;
}
EXPORT_SYMBOL(ceph_file_part);

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_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";
	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;

	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);


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_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,
};

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"},
	/* 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"},
	{-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_warning("ceph: Mount failed due to key not found: %s\n", name);
			break;
		case -EKEYEXPIRED:
			pr_warning("ceph: Mount failed due to expired key: %s\n", name);
			break;
		case -EKEYREVOKED:
			pr_warning("ceph: Mount failed due to revoked key: %s\n", name);
			break;
		default:
			pr_warning("ceph: Mount failed due to unknown key error"
			       " %d: %s\n", key_err, name);
		}
		err = -EPERM;
		goto out;
	}

	ckey = ukey->payload.data;
	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; /* seconds */
	opt->osd_idle_ttl = CEPH_OSD_IDLE_TTL_DEFAULT;   /* seconds */

	/* 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:
			opt->name = kstrndup(argstr[0].from,
					      argstr[0].to-argstr[0].from,
					      GFP_KERNEL);
			break;
		case Opt_secret:
		        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:
		        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_warning("ignoring deprecated osdtimeout option\n");
			break;
		case Opt_osdkeepalivetimeout:
			opt->osd_keepalive_timeout = intval;
			break;
		case Opt_osd_idle_ttl:
			opt->osd_idle_ttl = intval;
			break;
		case Opt_mount_timeout:
			opt->mount_timeout = intval;
			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;

		default:
			BUG_ON(token);
		}
	}

	/* success */
	return opt;

out:
	ceph_destroy_options(opt);
	return ERR_PTR(err);
}
EXPORT_SYMBOL(ceph_parse_options);

u64 ceph_client_id(struct ceph_client *client)
{
	return client->monc.auth->global_id;
}
EXPORT_SYMBOL(ceph_client_id);

/*
 * create a fresh client instance
 */
struct ceph_client *ceph_create_client(struct ceph_options *opt, void *private,
				       unsigned int supported_features,
				       unsigned int required_features)
{
	struct ceph_client *client;
	struct ceph_entity_addr *myaddr = NULL;
	int err = -ENOMEM;

	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 |
		supported_features;
	client->required_features = CEPH_FEATURES_REQUIRED_DEFAULT |
		required_features;

	/* msgr */
	if (ceph_test_opt(client, MYIP))
		myaddr = &client->options->my_addr;
	ceph_messenger_init(&client->msgr, myaddr,
		client->supported_features,
		client->required_features,
		ceph_test_opt(client, NOCRC));

	/* 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:
	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_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 int 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)
{
	int err;
	unsigned long timeout = client->options->mount_timeout * HZ;

	/* 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)) {
		err = -EIO;
		if (timeout && time_after_eq(jiffies, started + timeout))
			return err;

		/* 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),
			timeout);
		if (err == -EINTR || err == -ERESTARTSYS)
			return err;
		if (client->auth_err < 0)
			return client->auth_err;
	}

	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;

	pr_info("loaded (mon/osd proto %d/%d, osdmap %d/%d %d/%d)\n",
		CEPH_MONC_PROTOCOL, CEPH_OSDC_PROTOCOL,
		CEPH_OSDMAP_VERSION, CEPH_OSDMAP_VERSION_EXT,
		CEPH_OSDMAP_INC_VERSION, CEPH_OSDMAP_INC_VERSION_EXT);

	return 0;

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");
	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 filesystem for Linux");
MODULE_LICENSE("GPL");
Commit	Line	Data
3d14c5d2 YS	1
	2	#include <linux/ceph/ceph_debug.h>
	3	#include <linux/backing-dev.h>
	4	#include <linux/ctype.h>
	5	#include <linux/fs.h>
	6	#include <linux/inet.h>
	7	#include <linux/in6.h>
e2c3d29b	8	#include <linux/key.h>
4b2a58ab	9	#include <keys/ceph-type.h>
3d14c5d2 YS	10	#include <linux/module.h>
	11	#include <linux/mount.h>
	12	#include <linux/parser.h>
	13	#include <linux/sched.h>
	14	#include <linux/seq_file.h>
	15	#include <linux/slab.h>
	16	#include <linux/statfs.h>
	17	#include <linux/string.h>
	18
	19
1fe60e51	20	#include <linux/ceph/ceph_features.h>
3d14c5d2 YS	21	#include <linux/ceph/libceph.h>
	22	#include <linux/ceph/debugfs.h>
	23	#include <linux/ceph/decode.h>
	24	#include <linux/ceph/mon_client.h>
	25	#include <linux/ceph/auth.h>
8323c3aa	26	#include "crypto.h"
3d14c5d2 YS	27
3d14c5d2 YS	28
72fe25e3 AE	29	/*
	30	* Module compatibility interface. For now it doesn't do anything,
	31	* but its existence signals a certain level of functionality.
	32	*
	33	* The data buffer is used to pass information both to and from
	34	* libceph. The return value indicates whether libceph determines
	35	* it is compatible with the caller (from another kernel module),
	36	* given the provided data.
	37	*
	38	* The data pointer can be null.
	39	*/
	40	bool libceph_compatible(void *data)
	41	{
	42	return false;
	43	}
	44	EXPORT_SYMBOL(libceph_compatible);
3d14c5d2 YS	45
	46	/*
	47	* find filename portion of a path (/foo/bar/baz -> baz)
	48	*/
	49	const char ceph_file_part(const char s, int len)
	50	{
	51	const char *e = s + len;
	52
	53	while (e != s && *(e-1) != '/')
	54	e--;
	55	return e;
	56	}
	57	EXPORT_SYMBOL(ceph_file_part);
	58
	59	const char *ceph_msg_type_name(int type)
	60	{
	61	switch (type) {
	62	case CEPH_MSG_SHUTDOWN: return "shutdown";
	63	case CEPH_MSG_PING: return "ping";
	64	case CEPH_MSG_AUTH: return "auth";
	65	case CEPH_MSG_AUTH_REPLY: return "auth_reply";
	66	case CEPH_MSG_MON_MAP: return "mon_map";
	67	case CEPH_MSG_MON_GET_MAP: return "mon_get_map";
	68	case CEPH_MSG_MON_SUBSCRIBE: return "mon_subscribe";
	69	case CEPH_MSG_MON_SUBSCRIBE_ACK: return "mon_subscribe_ack";
	70	case CEPH_MSG_STATFS: return "statfs";
	71	case CEPH_MSG_STATFS_REPLY: return "statfs_reply";
	72	case CEPH_MSG_MDS_MAP: return "mds_map";
	73	case CEPH_MSG_CLIENT_SESSION: return "client_session";
	74	case CEPH_MSG_CLIENT_RECONNECT: return "client_reconnect";
	75	case CEPH_MSG_CLIENT_REQUEST: return "client_request";
	76	case CEPH_MSG_CLIENT_REQUEST_FORWARD: return "client_request_forward";
	77	case CEPH_MSG_CLIENT_REPLY: return "client_reply";
	78	case CEPH_MSG_CLIENT_CAPS: return "client_caps";
	79	case CEPH_MSG_CLIENT_CAPRELEASE: return "client_cap_release";
	80	case CEPH_MSG_CLIENT_SNAP: return "client_snap";
	81	case CEPH_MSG_CLIENT_LEASE: return "client_lease";
	82	case CEPH_MSG_OSD_MAP: return "osd_map";
	83	case CEPH_MSG_OSD_OP: return "osd_op";
	84	case CEPH_MSG_OSD_OPREPLY: return "osd_opreply";
a40c4f10	85	case CEPH_MSG_WATCH_NOTIFY: return "watch_notify";
3d14c5d2 YS	86	default: return "unknown";
	87	}
	88	}
	89	EXPORT_SYMBOL(ceph_msg_type_name);
	90
	91	/*
	92	* Initially learn our fsid, or verify an fsid matches.
	93	*/
	94	int ceph_check_fsid(struct ceph_client client, struct ceph_fsid fsid)
	95	{
	96	if (client->have_fsid) {
	97	if (ceph_fsid_compare(&client->fsid, fsid)) {
	98	pr_err("bad fsid, had %pU got %pU",
	99	&client->fsid, fsid);
	100	return -1;
	101	}
	102	} else {
3d14c5d2	103	memcpy(&client->fsid, fsid, sizeof(*fsid));
3d14c5d2 YS	104	}
	105	return 0;
	106	}
	107	EXPORT_SYMBOL(ceph_check_fsid);
	108
	109	static int strcmp_null(const char s1, const char s2)
	110	{
	111	if (!s1 && !s2)
	112	return 0;
	113	if (s1 && !s2)
	114	return -1;
	115	if (!s1 && s2)
	116	return 1;
	117	return strcmp(s1, s2);
	118	}
	119
	120	int ceph_compare_options(struct ceph_options *new_opt,
	121	struct ceph_client *client)
	122	{
	123	struct ceph_options *opt1 = new_opt;
	124	struct ceph_options *opt2 = client->options;
	125	int ofs = offsetof(struct ceph_options, mon_addr);
	126	int i;
	127	int ret;
	128
	129	ret = memcmp(opt1, opt2, ofs);
	130	if (ret)
	131	return ret;
	132
	133	ret = strcmp_null(opt1->name, opt2->name);
	134	if (ret)
	135	return ret;
	136
8323c3aa TV	137	if (opt1->key && !opt2->key)
	138	return -1;
	139	if (!opt1->key && opt2->key)
	140	return 1;
	141	if (opt1->key && opt2->key) {
	142	if (opt1->key->type != opt2->key->type)
	143	return -1;
	144	if (opt1->key->created.tv_sec != opt2->key->created.tv_sec)
	145	return -1;
	146	if (opt1->key->created.tv_nsec != opt2->key->created.tv_nsec)
	147	return -1;
	148	if (opt1->key->len != opt2->key->len)
	149	return -1;
	150	if (opt1->key->key && !opt2->key->key)
	151	return -1;
	152	if (!opt1->key->key && opt2->key->key)
	153	return 1;
	154	if (opt1->key->key && opt2->key->key) {
	155	ret = memcmp(opt1->key->key, opt2->key->key, opt1->key->len);
	156	if (ret)
	157	return ret;
	158	}
	159	}
3d14c5d2 YS	160
	161	/* any matching mon ip implies a match */
	162	for (i = 0; i < opt1->num_mon; i++) {
	163	if (ceph_monmap_contains(client->monc.monmap,
	164	&opt1->mon_addr[i]))
	165	return 0;
	166	}
	167	return -1;
	168	}
	169	EXPORT_SYMBOL(ceph_compare_options);
	170
	171
	172	static int parse_fsid(const char str, struct ceph_fsid fsid)
	173	{
	174	int i = 0;
	175	char tmp[3];
	176	int err = -EINVAL;
	177	int d;
	178
	179	dout("parse_fsid '%s'\n", str);
	180	tmp[2] = 0;
	181	while (*str && i < 16) {
	182	if (ispunct(*str)) {
	183	str++;
	184	continue;
	185	}
	186	if (!isxdigit(str[0]) \|\| !isxdigit(str[1]))
	187	break;
	188	tmp[0] = str[0];
	189	tmp[1] = str[1];
	190	if (sscanf(tmp, "%x", &d) < 1)
	191	break;
	192	fsid->fsid[i] = d & 0xff;
	193	i++;
	194	str += 2;
	195	}
	196
	197	if (i == 16)
	198	err = 0;
	199	dout("parse_fsid ret %d got fsid %pU", err, fsid);
	200	return err;
	201	}
	202
	203	/*
	204	* ceph options
	205	*/
	206	enum {
	207	Opt_osdtimeout,
	208	Opt_osdkeepalivetimeout,
	209	Opt_mount_timeout,
	210	Opt_osd_idle_ttl,
	211	Opt_last_int,
	212	/* int args above */
	213	Opt_fsid,
	214	Opt_name,
	215	Opt_secret,
e2c3d29b	216	Opt_key,
3d14c5d2 YS	217	Opt_ip,
	218	Opt_last_string,
	219	/* string args above */
cffaba15	220	Opt_share,
3d14c5d2	221	Opt_noshare,
cffaba15	222	Opt_crc,
3d14c5d2 YS	223	Opt_nocrc,
	224	};
	225
	226	static match_table_t opt_tokens = {
	227	{Opt_osdtimeout, "osdtimeout=%d"},
	228	{Opt_osdkeepalivetimeout, "osdkeepalive=%d"},
	229	{Opt_mount_timeout, "mount_timeout=%d"},
	230	{Opt_osd_idle_ttl, "osd_idle_ttl=%d"},
	231	/* int args above */
	232	{Opt_fsid, "fsid=%s"},
	233	{Opt_name, "name=%s"},
	234	{Opt_secret, "secret=%s"},
e2c3d29b	235	{Opt_key, "key=%s"},
3d14c5d2 YS	236	{Opt_ip, "ip=%s"},
3d14c5d2 YS	237	/* string args above */
cffaba15	238	{Opt_share, "share"},
3d14c5d2	239	{Opt_noshare, "noshare"},
cffaba15	240	{Opt_crc, "crc"},
3d14c5d2 YS	241	{Opt_nocrc, "nocrc"},
	242	{-1, NULL}
	243	};
	244
	245	void ceph_destroy_options(struct ceph_options *opt)
	246	{
	247	dout("destroy_options %p\n", opt);
	248	kfree(opt->name);
8323c3aa TV	249	if (opt->key) {
	250	ceph_crypto_key_destroy(opt->key);
	251	kfree(opt->key);
	252	}
1cad7893	253	kfree(opt->mon_addr);
3d14c5d2 YS	254	kfree(opt);
	255	}
	256	EXPORT_SYMBOL(ceph_destroy_options);
	257
e2c3d29b TV	258	/* get secret from key store */
	259	static int get_secret(struct ceph_crypto_key dst, const char name) {
	260	struct key *ukey;
	261	int key_err;
	262	int err = 0;
4b2a58ab	263	struct ceph_crypto_key *ckey;
e2c3d29b	264
4b2a58ab	265	ukey = request_key(&key_type_ceph, name, NULL);
e2c3d29b TV	266	if (!ukey \|\| IS_ERR(ukey)) {
	267	/* request_key errors don't map nicely to mount(2)
	268	errors; don't even try, but still printk */
	269	key_err = PTR_ERR(ukey);
	270	switch (key_err) {
	271	case -ENOKEY:
	272	pr_warning("ceph: Mount failed due to key not found: %s\n", name);
	273	break;
	274	case -EKEYEXPIRED:
	275	pr_warning("ceph: Mount failed due to expired key: %s\n", name);
	276	break;
	277	case -EKEYREVOKED:
	278	pr_warning("ceph: Mount failed due to revoked key: %s\n", name);
	279	break;
	280	default:
	281	pr_warning("ceph: Mount failed due to unknown key error"
	282	" %d: %s\n", key_err, name);
	283	}
	284	err = -EPERM;
	285	goto out;
	286	}
	287
4b2a58ab TV	288	ckey = ukey->payload.data;
4b2a58ab TV	289	err = ceph_crypto_key_clone(dst, ckey);
e2c3d29b TV	290	if (err)
	291	goto out_key;
	292	/* pass through, err is 0 */
	293
	294	out_key:
	295	key_put(ukey);
	296	out:
	297	return err;
	298	}
	299
ee57741c AE	300	struct ceph_options *
	301	ceph_parse_options(char options, const char dev_name,
	302	const char *dev_name_end,
	303	int (parse_extra_token)(char c, void *private),
	304	void *private)
3d14c5d2 YS	305	{
	306	struct ceph_options *opt;
	307	const char *c;
	308	int err = -ENOMEM;
	309	substring_t argstr[MAX_OPT_ARGS];
	310
	311	opt = kzalloc(sizeof(*opt), GFP_KERNEL);
	312	if (!opt)
ee57741c	313	return ERR_PTR(-ENOMEM);
3d14c5d2 YS	314	opt->mon_addr = kcalloc(CEPH_MAX_MON, sizeof(*opt->mon_addr),
	315	GFP_KERNEL);
	316	if (!opt->mon_addr)
	317	goto out;
	318
	319	dout("parse_options %p options '%s' dev_name '%s'\n", opt, options,
	320	dev_name);
	321
	322	/* start with defaults */
	323	opt->flags = CEPH_OPT_DEFAULT;
3d14c5d2 YS	324	opt->osd_keepalive_timeout = CEPH_OSD_KEEPALIVE_DEFAULT;
	325	opt->mount_timeout = CEPH_MOUNT_TIMEOUT_DEFAULT; /* seconds */
	326	opt->osd_idle_ttl = CEPH_OSD_IDLE_TTL_DEFAULT; /* seconds */
	327
	328	/* get mon ip(s) */
	329	/* ip1[:port1][,ip2[:port2]...] */
	330	err = ceph_parse_ips(dev_name, dev_name_end, opt->mon_addr,
	331	CEPH_MAX_MON, &opt->num_mon);
	332	if (err < 0)
	333	goto out;
	334
	335	/* parse mount options */
	336	while ((c = strsep(&options, ",")) != NULL) {
	337	int token, intval, ret;
	338	if (!*c)
	339	continue;
	340	err = -EINVAL;
	341	token = match_token((char *)c, opt_tokens, argstr);
010e3b48	342	if (token < 0 && parse_extra_token) {
3d14c5d2 YS	343	/* extra? */
	344	err = parse_extra_token((char *)c, private);
	345	if (err < 0) {
	346	pr_err("bad option at '%s'\n", c);
	347	goto out;
	348	}
	349	continue;
	350	}
	351	if (token < Opt_last_int) {
	352	ret = match_int(&argstr[0], &intval);
	353	if (ret < 0) {
	354	pr_err("bad mount option arg (not int) "
	355	"at '%s'\n", c);
	356	continue;
	357	}
	358	dout("got int token %d val %d\n", token, intval);
	359	} else if (token > Opt_last_int && token < Opt_last_string) {
	360	dout("got string token %d val %s\n", token,
	361	argstr[0].from);
	362	} else {
	363	dout("got token %d\n", token);
	364	}
	365	switch (token) {
	366	case Opt_ip:
	367	err = ceph_parse_ips(argstr[0].from,
	368	argstr[0].to,
	369	&opt->my_addr,
	370	1, NULL);
	371	if (err < 0)
	372	goto out;
	373	opt->flags \|= CEPH_OPT_MYIP;
	374	break;
	375
	376	case Opt_fsid:
	377	err = parse_fsid(argstr[0].from, &opt->fsid);
	378	if (err == 0)
	379	opt->flags \|= CEPH_OPT_FSID;
	380	break;
	381	case Opt_name:
	382	opt->name = kstrndup(argstr[0].from,
	383	argstr[0].to-argstr[0].from,
	384	GFP_KERNEL);
	385	break;
	386	case Opt_secret:
8323c3aa TV	387	opt->key = kzalloc(sizeof(*opt->key), GFP_KERNEL);
	388	if (!opt->key) {
	389	err = -ENOMEM;
	390	goto out;
	391	}
	392	err = ceph_crypto_key_unarmor(opt->key, argstr[0].from);
	393	if (err < 0)
	394	goto out;
3d14c5d2	395	break;
e2c3d29b TV	396	case Opt_key:
	397	opt->key = kzalloc(sizeof(*opt->key), GFP_KERNEL);
	398	if (!opt->key) {
	399	err = -ENOMEM;
	400	goto out;
	401	}
	402	err = get_secret(opt->key, argstr[0].from);
	403	if (err < 0)
	404	goto out;
	405	break;
3d14c5d2 YS	406
	407	/* misc */
	408	case Opt_osdtimeout:
83aff95e	409	pr_warning("ignoring deprecated osdtimeout option\n");
3d14c5d2 YS	410	break;
	411	case Opt_osdkeepalivetimeout:
	412	opt->osd_keepalive_timeout = intval;
	413	break;
	414	case Opt_osd_idle_ttl:
	415	opt->osd_idle_ttl = intval;
	416	break;
	417	case Opt_mount_timeout:
	418	opt->mount_timeout = intval;
	419	break;
	420
cffaba15 AE	421	case Opt_share:
	422	opt->flags &= ~CEPH_OPT_NOSHARE;
	423	break;
3d14c5d2 YS	424	case Opt_noshare:
	425	opt->flags \|= CEPH_OPT_NOSHARE;
	426	break;
	427
cffaba15 AE	428	case Opt_crc:
	429	opt->flags &= ~CEPH_OPT_NOCRC;
	430	break;
3d14c5d2 YS	431	case Opt_nocrc:
	432	opt->flags \|= CEPH_OPT_NOCRC;
	433	break;
	434
	435	default:
	436	BUG_ON(token);
	437	}
	438	}
	439
	440	/* success */
ee57741c	441	return opt;
3d14c5d2 YS	442
	443	out:
	444	ceph_destroy_options(opt);
ee57741c	445	return ERR_PTR(err);
3d14c5d2 YS	446	}
	447	EXPORT_SYMBOL(ceph_parse_options);
	448
	449	u64 ceph_client_id(struct ceph_client *client)
	450	{
	451	return client->monc.auth->global_id;
	452	}
	453	EXPORT_SYMBOL(ceph_client_id);
	454
	455	/*
	456	* create a fresh client instance
	457	*/
6ab00d46	458	struct ceph_client ceph_create_client(struct ceph_options opt, void *private,
95c96174 ED	459	unsigned int supported_features,
95c96174 ED	460	unsigned int required_features)
3d14c5d2 YS	461	{
3d14c5d2 YS	462	struct ceph_client *client;
6ab00d46	463	struct ceph_entity_addr *myaddr = NULL;
3d14c5d2 YS	464	int err = -ENOMEM;
	465
	466	client = kzalloc(sizeof(*client), GFP_KERNEL);
	467	if (client == NULL)
	468	return ERR_PTR(-ENOMEM);
	469
	470	client->private = private;
	471	client->options = opt;
	472
	473	mutex_init(&client->mount_mutex);
	474	init_waitqueue_head(&client->auth_wq);
	475	client->auth_err = 0;
	476
	477	client->extra_mon_dispatch = NULL;
1fe60e51	478	client->supported_features = CEPH_FEATURES_SUPPORTED_DEFAULT \|
6ab00d46	479	supported_features;
1fe60e51	480	client->required_features = CEPH_FEATURES_REQUIRED_DEFAULT \|
6ab00d46 SW	481	required_features;
	482
	483	/* msgr */
	484	if (ceph_test_opt(client, MYIP))
	485	myaddr = &client->options->my_addr;
15d9882c AE	486	ceph_messenger_init(&client->msgr, myaddr,
	487	client->supported_features,
	488	client->required_features,
	489	ceph_test_opt(client, NOCRC));
3d14c5d2 YS	490
	491	/* subsystems */
	492	err = ceph_monc_init(&client->monc, client);
	493	if (err < 0)
15d9882c	494	goto fail;
3d14c5d2 YS	495	err = ceph_osdc_init(&client->osdc, client);
	496	if (err < 0)
	497	goto fail_monc;
	498
	499	return client;
	500
	501	fail_monc:
	502	ceph_monc_stop(&client->monc);
	503	fail:
	504	kfree(client);
	505	return ERR_PTR(err);
	506	}
	507	EXPORT_SYMBOL(ceph_create_client);
	508
	509	void ceph_destroy_client(struct ceph_client *client)
	510	{
	511	dout("destroy_client %p\n", client);
	512
a2a32584 GH	513	atomic_set(&client->msgr.stopping, 1);
a2a32584 GH	514
3d14c5d2 YS	515	/* unmount */
	516	ceph_osdc_stop(&client->osdc);
	517
3d14c5d2 YS	518	ceph_monc_stop(&client->monc);
	519
	520	ceph_debugfs_client_cleanup(client);
	521
3d14c5d2 YS	522	ceph_destroy_options(client->options);
	523
	524	kfree(client);
	525	dout("destroy_client %p done\n", client);
	526	}
	527	EXPORT_SYMBOL(ceph_destroy_client);
	528
	529	/*
	530	* true if we have the mon map (and have thus joined the cluster)
	531	*/
	532	static int have_mon_and_osd_map(struct ceph_client *client)
	533	{
	534	return client->monc.monmap && client->monc.monmap->epoch &&
	535	client->osdc.osdmap && client->osdc.osdmap->epoch;
	536	}
	537
	538	/*
	539	* mount: join the ceph cluster, and open root directory.
	540	*/
	541	int __ceph_open_session(struct ceph_client *client, unsigned long started)
	542	{
3d14c5d2 YS	543	int err;
	544	unsigned long timeout = client->options->mount_timeout * HZ;
	545
3d14c5d2 YS	546	/* open session, and wait for mon and osd maps */
	547	err = ceph_monc_open_session(&client->monc);
	548	if (err < 0)
	549	return err;
	550
	551	while (!have_mon_and_osd_map(client)) {
	552	err = -EIO;
	553	if (timeout && time_after_eq(jiffies, started + timeout))
	554	return err;
	555
	556	/* wait */
	557	dout("mount waiting for mon_map\n");
	558	err = wait_event_interruptible_timeout(client->auth_wq,
	559	have_mon_and_osd_map(client) \|\| (client->auth_err < 0),
	560	timeout);
	561	if (err == -EINTR \|\| err == -ERESTARTSYS)
	562	return err;
	563	if (client->auth_err < 0)
	564	return client->auth_err;
	565	}
	566
	567	return 0;
	568	}
	569	EXPORT_SYMBOL(__ceph_open_session);
	570
	571
	572	int ceph_open_session(struct ceph_client *client)
	573	{
	574	int ret;
	575	unsigned long started = jiffies; /* note the start time */
	576
	577	dout("open_session start\n");
	578	mutex_lock(&client->mount_mutex);
	579
	580	ret = __ceph_open_session(client, started);
	581
	582	mutex_unlock(&client->mount_mutex);
	583	return ret;
	584	}
	585	EXPORT_SYMBOL(ceph_open_session);
	586
	587
	588	static int __init init_ceph_lib(void)
	589	{
	590	int ret = 0;
	591
	592	ret = ceph_debugfs_init();
	593	if (ret < 0)
	594	goto out;
	595
4b2a58ab	596	ret = ceph_crypto_init();
3d14c5d2 YS	597	if (ret < 0)
	598	goto out_debugfs;
	599
4b2a58ab TV	600	ret = ceph_msgr_init();
	601	if (ret < 0)
	602	goto out_crypto;
	603
3d14c5d2 YS	604	pr_info("loaded (mon/osd proto %d/%d, osdmap %d/%d %d/%d)\n",
	605	CEPH_MONC_PROTOCOL, CEPH_OSDC_PROTOCOL,
	606	CEPH_OSDMAP_VERSION, CEPH_OSDMAP_VERSION_EXT,
	607	CEPH_OSDMAP_INC_VERSION, CEPH_OSDMAP_INC_VERSION_EXT);
	608
	609	return 0;
	610
4b2a58ab TV	611	out_crypto:
4b2a58ab TV	612	ceph_crypto_shutdown();
3d14c5d2 YS	613	out_debugfs:
	614	ceph_debugfs_cleanup();
	615	out:
	616	return ret;
	617	}
	618
	619	static void __exit exit_ceph_lib(void)
	620	{
	621	dout("exit_ceph_lib\n");
	622	ceph_msgr_exit();
4b2a58ab	623	ceph_crypto_shutdown();
3d14c5d2 YS	624	ceph_debugfs_cleanup();
	625	}
	626
	627	module_init(init_ceph_lib);
	628	module_exit(exit_ceph_lib);
	629
	630	MODULE_AUTHOR("Sage Weil <sage@newdream.net>");
	631	MODULE_AUTHOR("Yehuda Sadeh <yehuda@hq.newdream.net>");
	632	MODULE_AUTHOR("Patience Warnick <patience@newdream.net>");
	633	MODULE_DESCRIPTION("Ceph filesystem for Linux");
	634	MODULE_LICENSE("GPL");