[mirror_ubuntu-bionic-kernel.git] / include / linux / ceph / libceph.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _FS_CEPH_LIBCEPH_H
#define _FS_CEPH_LIBCEPH_H

#include <linux/ceph/ceph_debug.h>

#include <asm/unaligned.h>
#include <linux/backing-dev.h>
#include <linux/completion.h>
#include <linux/exportfs.h>
#include <linux/bug.h>
#include <linux/fs.h>
#include <linux/mempool.h>
#include <linux/pagemap.h>
#include <linux/wait.h>
#include <linux/writeback.h>
#include <linux/slab.h>
#include <linux/refcount.h>

#include <linux/ceph/types.h>
#include <linux/ceph/messenger.h>
#include <linux/ceph/msgpool.h>
#include <linux/ceph/mon_client.h>
#include <linux/ceph/osd_client.h>
#include <linux/ceph/ceph_fs.h>
#include <linux/ceph/string_table.h>

/*
 * mount options
 */
#define CEPH_OPT_FSID             (1<<0)
#define CEPH_OPT_NOSHARE          (1<<1) /* don't share client with other sbs */
#define CEPH_OPT_MYIP             (1<<2) /* specified my ip */
#define CEPH_OPT_NOCRC            (1<<3) /* no data crc on writes */
#define CEPH_OPT_NOMSGAUTH	  (1<<4) /* don't require msg signing feat */
#define CEPH_OPT_TCP_NODELAY	  (1<<5) /* TCP_NODELAY on TCP sockets */
#define CEPH_OPT_NOMSGSIGN	  (1<<6) /* don't sign msgs */

#define CEPH_OPT_DEFAULT   (CEPH_OPT_TCP_NODELAY)

#define ceph_set_opt(client, opt) \
	(client)->options->flags |= CEPH_OPT_##opt;
#define ceph_test_opt(client, opt) \
	(!!((client)->options->flags & CEPH_OPT_##opt))

struct ceph_options {
	int flags;
	struct ceph_fsid fsid;
	struct ceph_entity_addr my_addr;
	unsigned long mount_timeout;		/* jiffies */
	unsigned long osd_idle_ttl;		/* jiffies */
	unsigned long osd_keepalive_timeout;	/* jiffies */
	unsigned long osd_request_timeout;	/* jiffies */

	/*
	 * any type that can't be simply compared or doesn't need need
	 * to be compared should go beyond this point,
	 * ceph_compare_options() should be updated accordingly
	 */

	struct ceph_entity_addr *mon_addr; /* should be the first
					      pointer type of args */
	int num_mon;
	char *name;
	struct ceph_crypto_key *key;
};

/*
 * defaults
 */
#define CEPH_MOUNT_TIMEOUT_DEFAULT	msecs_to_jiffies(60 * 1000)
#define CEPH_OSD_KEEPALIVE_DEFAULT	msecs_to_jiffies(5 * 1000)
#define CEPH_OSD_IDLE_TTL_DEFAULT	msecs_to_jiffies(60 * 1000)
#define CEPH_OSD_REQUEST_TIMEOUT_DEFAULT 0  /* no timeout */

#define CEPH_MONC_HUNT_INTERVAL		msecs_to_jiffies(3 * 1000)
#define CEPH_MONC_PING_INTERVAL		msecs_to_jiffies(10 * 1000)
#define CEPH_MONC_PING_TIMEOUT		msecs_to_jiffies(30 * 1000)
#define CEPH_MONC_HUNT_BACKOFF		2
#define CEPH_MONC_HUNT_MAX_MULT		10

#define CEPH_MSG_MAX_FRONT_LEN	(16*1024*1024)
#define CEPH_MSG_MAX_MIDDLE_LEN	(16*1024*1024)

/*
 * Handle the largest possible rbd object in one message.
 * There is no limit on the size of cephfs objects, but it has to obey
 * rsize and wsize mount options anyway.
 */
#define CEPH_MSG_MAX_DATA_LEN	(32*1024*1024)

#define CEPH_AUTH_NAME_DEFAULT   "guest"

/* mount state */
enum {
	CEPH_MOUNT_MOUNTING,
	CEPH_MOUNT_MOUNTED,
	CEPH_MOUNT_UNMOUNTING,
	CEPH_MOUNT_UNMOUNTED,
	CEPH_MOUNT_SHUTDOWN,
};

static inline unsigned long ceph_timeout_jiffies(unsigned long timeout)
{
	return timeout ?: MAX_SCHEDULE_TIMEOUT;
}

struct ceph_mds_client;

/*
 * per client state
 *
 * possibly shared by multiple mount points, if they are
 * mounting the same ceph filesystem/cluster.
 */
struct ceph_client {
	struct ceph_fsid fsid;
	bool have_fsid;

	void *private;

	struct ceph_options *options;

	struct mutex mount_mutex;      /* serialize mount attempts */
	wait_queue_head_t auth_wq;
	int auth_err;

	int (*extra_mon_dispatch)(struct ceph_client *, struct ceph_msg *);

	u64 supported_features;
	u64 required_features;

	struct ceph_messenger msgr;   /* messenger instance */
	struct ceph_mon_client monc;
	struct ceph_osd_client osdc;

#ifdef CONFIG_DEBUG_FS
	struct dentry *debugfs_dir;
	struct dentry *debugfs_monmap;
	struct dentry *debugfs_osdmap;
	struct dentry *debugfs_options;
#endif
};

#define from_msgr(ms)	container_of(ms, struct ceph_client, msgr)


/*
 * snapshots
 */

/*
 * A "snap context" is the set of existing snapshots when we
 * write data.  It is used by the OSD to guide its COW behavior.
 *
 * The ceph_snap_context is refcounted, and attached to each dirty
 * page, indicating which context the dirty data belonged when it was
 * dirtied.
 */
struct ceph_snap_context {
	refcount_t nref;
	u64 seq;
	u32 num_snaps;
	u64 snaps[];
};

extern struct ceph_snap_context *ceph_create_snap_context(u32 snap_count,
					gfp_t gfp_flags);
extern struct ceph_snap_context *ceph_get_snap_context(
					struct ceph_snap_context *sc);
extern void ceph_put_snap_context(struct ceph_snap_context *sc);

/*
 * calculate the number of pages a given length and offset map onto,
 * if we align the data.
 */
static inline int calc_pages_for(u64 off, u64 len)
{
	return ((off+len+PAGE_SIZE-1) >> PAGE_SHIFT) -
		(off >> PAGE_SHIFT);
}

#define RB_BYVAL(a)      (a)
#define RB_BYPTR(a)      (&(a))
#define RB_CMP3WAY(a, b) ((a) < (b) ? -1 : (a) > (b))

#define DEFINE_RB_INSDEL_FUNCS2(name, type, keyfld, cmpexp, keyexp, nodefld) \
static void insert_##name(struct rb_root *root, type *t)		\
{									\
	struct rb_node **n = &root->rb_node;				\
	struct rb_node *parent = NULL;					\
									\
	BUG_ON(!RB_EMPTY_NODE(&t->nodefld));				\
									\
	while (*n) {							\
		type *cur = rb_entry(*n, type, nodefld);		\
		int cmp;						\
									\
		parent = *n;						\
		cmp = cmpexp(keyexp(t->keyfld), keyexp(cur->keyfld));	\
		if (cmp < 0)						\
			n = &(*n)->rb_left;				\
		else if (cmp > 0)					\
			n = &(*n)->rb_right;				\
		else							\
			BUG();						\
	}								\
									\
	rb_link_node(&t->nodefld, parent, n);				\
	rb_insert_color(&t->nodefld, root);				\
}									\
static void erase_##name(struct rb_root *root, type *t)			\
{									\
	BUG_ON(RB_EMPTY_NODE(&t->nodefld));				\
	rb_erase(&t->nodefld, root);					\
	RB_CLEAR_NODE(&t->nodefld);					\
}

/*
 * @lookup_param_type is a parameter and not constructed from (@type,
 * @keyfld) with typeof() because adding const is too unwieldy.
 */
#define DEFINE_RB_LOOKUP_FUNC2(name, type, keyfld, cmpexp, keyexp,	\
			       lookup_param_type, nodefld)		\
static type *lookup_##name(struct rb_root *root, lookup_param_type key)	\
{									\
	struct rb_node *n = root->rb_node;				\
									\
	while (n) {							\
		type *cur = rb_entry(n, type, nodefld);			\
		int cmp;						\
									\
		cmp = cmpexp(key, keyexp(cur->keyfld));			\
		if (cmp < 0)						\
			n = n->rb_left;					\
		else if (cmp > 0)					\
			n = n->rb_right;				\
		else							\
			return cur;					\
	}								\
									\
	return NULL;							\
}

#define DEFINE_RB_FUNCS2(name, type, keyfld, cmpexp, keyexp,		\
			 lookup_param_type, nodefld)			\
DEFINE_RB_INSDEL_FUNCS2(name, type, keyfld, cmpexp, keyexp, nodefld)	\
DEFINE_RB_LOOKUP_FUNC2(name, type, keyfld, cmpexp, keyexp,		\
		       lookup_param_type, nodefld)

/*
 * Shorthands for integer keys.
 */
#define DEFINE_RB_INSDEL_FUNCS(name, type, keyfld, nodefld)		\
DEFINE_RB_INSDEL_FUNCS2(name, type, keyfld, RB_CMP3WAY, RB_BYVAL, nodefld)

#define DEFINE_RB_LOOKUP_FUNC(name, type, keyfld, nodefld)		\
extern type __lookup_##name##_key;					\
DEFINE_RB_LOOKUP_FUNC2(name, type, keyfld, RB_CMP3WAY, RB_BYVAL,	\
		       typeof(__lookup_##name##_key.keyfld), nodefld)

#define DEFINE_RB_FUNCS(name, type, keyfld, nodefld)			\
DEFINE_RB_INSDEL_FUNCS(name, type, keyfld, nodefld)			\
DEFINE_RB_LOOKUP_FUNC(name, type, keyfld, nodefld)

extern struct kmem_cache *ceph_inode_cachep;
extern struct kmem_cache *ceph_cap_cachep;
extern struct kmem_cache *ceph_cap_flush_cachep;
extern struct kmem_cache *ceph_dentry_cachep;
extern struct kmem_cache *ceph_file_cachep;

/* ceph_common.c */
extern bool libceph_compatible(void *data);

extern const char *ceph_msg_type_name(int type);
extern int ceph_check_fsid(struct ceph_client *client, struct ceph_fsid *fsid);
extern void *ceph_kvmalloc(size_t size, gfp_t flags);

extern 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);
int ceph_print_client_options(struct seq_file *m, struct ceph_client *client);
extern void ceph_destroy_options(struct ceph_options *opt);
extern int ceph_compare_options(struct ceph_options *new_opt,
				struct ceph_client *client);
struct ceph_client *ceph_create_client(struct ceph_options *opt, void *private);
struct ceph_entity_addr *ceph_client_addr(struct ceph_client *client);
u64 ceph_client_gid(struct ceph_client *client);
extern void ceph_destroy_client(struct ceph_client *client);
extern int __ceph_open_session(struct ceph_client *client,
			       unsigned long started);
extern int ceph_open_session(struct ceph_client *client);
int ceph_wait_for_latest_osdmap(struct ceph_client *client,
				unsigned long timeout);

/* pagevec.c */
extern void ceph_release_page_vector(struct page **pages, int num_pages);

extern struct page **ceph_get_direct_page_vector(const void __user *data,
						 int num_pages,
						 bool write_page);
extern void ceph_put_page_vector(struct page **pages, int num_pages,
				 bool dirty);
extern struct page **ceph_alloc_page_vector(int num_pages, gfp_t flags);
extern int ceph_copy_user_to_page_vector(struct page **pages,
					 const void __user *data,
					 loff_t off, size_t len);
extern void ceph_copy_to_page_vector(struct page **pages,
				    const void *data,
				    loff_t off, size_t len);
extern void ceph_copy_from_page_vector(struct page **pages,
				    void *data,
				    loff_t off, size_t len);
extern void ceph_zero_page_vector_range(int off, int len, struct page **pages);


#endif /* _FS_CEPH_SUPER_H */
Commit	Line	Data
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
3d14c5d2 YS	2	#ifndef _FS_CEPH_LIBCEPH_H
	3	#define _FS_CEPH_LIBCEPH_H
	4
a1ce3928	5	#include <linux/ceph/ceph_debug.h>
3d14c5d2 YS	6
	7	#include <asm/unaligned.h>
	8	#include <linux/backing-dev.h>
	9	#include <linux/completion.h>
	10	#include <linux/exportfs.h>
187f1882	11	#include <linux/bug.h>
3d14c5d2 YS	12	#include <linux/fs.h>
	13	#include <linux/mempool.h>
	14	#include <linux/pagemap.h>
	15	#include <linux/wait.h>
	16	#include <linux/writeback.h>
	17	#include <linux/slab.h>
06dfa963	18	#include <linux/refcount.h>
3d14c5d2	19
a1ce3928 DH	20	#include <linux/ceph/types.h>
	21	#include <linux/ceph/messenger.h>
	22	#include <linux/ceph/msgpool.h>
	23	#include <linux/ceph/mon_client.h>
	24	#include <linux/ceph/osd_client.h>
	25	#include <linux/ceph/ceph_fs.h>
51e92737	26	#include <linux/ceph/string_table.h>
3d14c5d2	27
3d14c5d2 YS	28	/*
	29	* mount options
	30	*/
	31	#define CEPH_OPT_FSID (1<<0)
	32	#define CEPH_OPT_NOSHARE (1<<1) /* don't share client with other sbs */
	33	#define CEPH_OPT_MYIP (1<<2) /* specified my ip */
	34	#define CEPH_OPT_NOCRC (1<<3) /* no data crc on writes */
a51983e4	35	#define CEPH_OPT_NOMSGAUTH (1<<4) /* don't require msg signing feat */
ba988f87	36	#define CEPH_OPT_TCP_NODELAY (1<<5) /* TCP_NODELAY on TCP sockets */
a51983e4	37	#define CEPH_OPT_NOMSGSIGN (1<<6) /* don't sign msgs */
3d14c5d2	38
ba988f87	39	#define CEPH_OPT_DEFAULT (CEPH_OPT_TCP_NODELAY)
3d14c5d2 YS	40
	41	#define ceph_set_opt(client, opt) \
	42	(client)->options->flags \|= CEPH_OPT_##opt;
	43	#define ceph_test_opt(client, opt) \
	44	(!!((client)->options->flags & CEPH_OPT_##opt))
	45
	46	struct ceph_options {
	47	int flags;
	48	struct ceph_fsid fsid;
	49	struct ceph_entity_addr my_addr;
a319bf56 ID	50	unsigned long mount_timeout; /* jiffies */
	51	unsigned long osd_idle_ttl; /* jiffies */
	52	unsigned long osd_keepalive_timeout; /* jiffies */
7cc5e38f	53	unsigned long osd_request_timeout; /* jiffies */
3d14c5d2 YS	54
	55	/*
	56	* any type that can't be simply compared or doesn't need need
	57	* to be compared should go beyond this point,
	58	* ceph_compare_options() should be updated accordingly
	59	*/
	60
	61	struct ceph_entity_addr mon_addr; / should be the first
	62	pointer type of args */
	63	int num_mon;
	64	char *name;
8323c3aa	65	struct ceph_crypto_key *key;
3d14c5d2 YS	66	};
	67
	68	/*
	69	* defaults
	70	*/
a319bf56 ID	71	#define CEPH_MOUNT_TIMEOUT_DEFAULT msecs_to_jiffies(60 * 1000)
	72	#define CEPH_OSD_KEEPALIVE_DEFAULT msecs_to_jiffies(5 * 1000)
	73	#define CEPH_OSD_IDLE_TTL_DEFAULT msecs_to_jiffies(60 * 1000)
7cc5e38f	74	#define CEPH_OSD_REQUEST_TIMEOUT_DEFAULT 0 /* no timeout */
58d81b12	75
168b9090	76	#define CEPH_MONC_HUNT_INTERVAL msecs_to_jiffies(3 * 1000)
58d81b12 ID	77	#define CEPH_MONC_PING_INTERVAL msecs_to_jiffies(10 * 1000)
58d81b12 ID	78	#define CEPH_MONC_PING_TIMEOUT msecs_to_jiffies(30 * 1000)
168b9090 ID	79	#define CEPH_MONC_HUNT_BACKOFF 2
168b9090 ID	80	#define CEPH_MONC_HUNT_MAX_MULT 10
3d14c5d2 YS	81
3d14c5d2 YS	82	#define CEPH_MSG_MAX_FRONT_LEN (1610241024)
7b11ba37	83	#define CEPH_MSG_MAX_MIDDLE_LEN (1610241024)
cf5c53aa ID	84
	85	/*
	86	* Handle the largest possible rbd object in one message.
	87	* There is no limit on the size of cephfs objects, but it has to obey
	88	* rsize and wsize mount options anyway.
	89	*/
	90	#define CEPH_MSG_MAX_DATA_LEN (3210241024)
3d14c5d2 YS	91
	92	#define CEPH_AUTH_NAME_DEFAULT "guest"
	93
3d14c5d2 YS	94	/* mount state */
	95	enum {
	96	CEPH_MOUNT_MOUNTING,
	97	CEPH_MOUNT_MOUNTED,
	98	CEPH_MOUNT_UNMOUNTING,
	99	CEPH_MOUNT_UNMOUNTED,
	100	CEPH_MOUNT_SHUTDOWN,
	101	};
	102
a319bf56 ID	103	static inline unsigned long ceph_timeout_jiffies(unsigned long timeout)
	104	{
	105	return timeout ?: MAX_SCHEDULE_TIMEOUT;
	106	}
	107
3d14c5d2 YS	108	struct ceph_mds_client;
	109
	110	/*
	111	* per client state
	112	*
	113	* possibly shared by multiple mount points, if they are
	114	* mounting the same ceph filesystem/cluster.
	115	*/
	116	struct ceph_client {
	117	struct ceph_fsid fsid;
	118	bool have_fsid;
	119
	120	void *private;
	121
	122	struct ceph_options *options;
	123
	124	struct mutex mount_mutex; /* serialize mount attempts */
	125	wait_queue_head_t auth_wq;
	126	int auth_err;
	127
	128	int (extra_mon_dispatch)(struct ceph_client , struct ceph_msg *);
	129
12b4629a ID	130	u64 supported_features;
12b4629a ID	131	u64 required_features;
3d14c5d2	132
15d9882c	133	struct ceph_messenger msgr; /* messenger instance */
3d14c5d2 YS	134	struct ceph_mon_client monc;
	135	struct ceph_osd_client osdc;
	136
	137	#ifdef CONFIG_DEBUG_FS
	138	struct dentry *debugfs_dir;
	139	struct dentry *debugfs_monmap;
	140	struct dentry *debugfs_osdmap;
5cf7bd30	141	struct dentry *debugfs_options;
3d14c5d2 YS	142	#endif
	143	};
	144
859bff51	145	#define from_msgr(ms) container_of(ms, struct ceph_client, msgr)
3d14c5d2 YS	146
	147
	148	/*
	149	* snapshots
	150	*/
	151
	152	/*
	153	* A "snap context" is the set of existing snapshots when we
	154	* write data. It is used by the OSD to guide its COW behavior.
	155	*
	156	* The ceph_snap_context is refcounted, and attached to each dirty
	157	* page, indicating which context the dirty data belonged when it was
	158	* dirtied.
	159	*/
	160	struct ceph_snap_context {
06dfa963	161	refcount_t nref;
3d14c5d2	162	u64 seq;
aa711ee3	163	u32 num_snaps;
3d14c5d2 YS	164	u64 snaps[];
	165	};
	166
4f0dcb10 AE	167	extern struct ceph_snap_context *ceph_create_snap_context(u32 snap_count,
	168	gfp_t gfp_flags);
	169	extern struct ceph_snap_context *ceph_get_snap_context(
	170	struct ceph_snap_context *sc);
	171	extern void ceph_put_snap_context(struct ceph_snap_context *sc);
3d14c5d2 YS	172
	173	/*
	174	* calculate the number of pages a given length and offset map onto,
	175	* if we align the data.
	176	*/
	177	static inline int calc_pages_for(u64 off, u64 len)
	178	{
09cbfeaf KS	179	return ((off+len+PAGE_SIZE-1) >> PAGE_SHIFT) -
09cbfeaf KS	180	(off >> PAGE_SHIFT);
3d14c5d2 YS	181	}
3d14c5d2 YS	182
76f827a7 ID	183	#define RB_BYVAL(a) (a)
	184	#define RB_BYPTR(a) (&(a))
	185	#define RB_CMP3WAY(a, b) ((a) < (b) ? -1 : (a) > (b))
	186
	187	#define DEFINE_RB_INSDEL_FUNCS2(name, type, keyfld, cmpexp, keyexp, nodefld) \
fcd00b68 ID	188	static void insert_##name(struct rb_root root, type t) \
	189	{ \
	190	struct rb_node **n = &root->rb_node; \
	191	struct rb_node *parent = NULL; \
	192	\
	193	BUG_ON(!RB_EMPTY_NODE(&t->nodefld)); \
	194	\
	195	while (*n) { \
	196	type cur = rb_entry(n, type, nodefld); \
76f827a7	197	int cmp; \
fcd00b68 ID	198	\
fcd00b68 ID	199	parent = *n; \
76f827a7 ID	200	cmp = cmpexp(keyexp(t->keyfld), keyexp(cur->keyfld)); \
76f827a7 ID	201	if (cmp < 0) \
fcd00b68	202	n = &(*n)->rb_left; \
76f827a7	203	else if (cmp > 0) \
fcd00b68 ID	204	n = &(*n)->rb_right; \
	205	else \
	206	BUG(); \
	207	} \
	208	\
	209	rb_link_node(&t->nodefld, parent, n); \
	210	rb_insert_color(&t->nodefld, root); \
	211	} \
	212	static void erase_##name(struct rb_root root, type t) \
	213	{ \
	214	BUG_ON(RB_EMPTY_NODE(&t->nodefld)); \
	215	rb_erase(&t->nodefld, root); \
	216	RB_CLEAR_NODE(&t->nodefld); \
	217	}
	218
76f827a7 ID	219	/*
	220	* @lookup_param_type is a parameter and not constructed from (@type,
	221	* @keyfld) with typeof() because adding const is too unwieldy.
	222	*/
	223	#define DEFINE_RB_LOOKUP_FUNC2(name, type, keyfld, cmpexp, keyexp, \
	224	lookup_param_type, nodefld) \
	225	static type lookup_##name(struct rb_root root, lookup_param_type key) \
fcd00b68 ID	226	{ \
	227	struct rb_node *n = root->rb_node; \
	228	\
	229	while (n) { \
	230	type *cur = rb_entry(n, type, nodefld); \
76f827a7	231	int cmp; \
fcd00b68	232	\
76f827a7 ID	233	cmp = cmpexp(key, keyexp(cur->keyfld)); \
76f827a7 ID	234	if (cmp < 0) \
fcd00b68	235	n = n->rb_left; \
76f827a7	236	else if (cmp > 0) \
fcd00b68 ID	237	n = n->rb_right; \
	238	else \
	239	return cur; \
	240	} \
	241	\
	242	return NULL; \
	243	}
	244
76f827a7 ID	245	#define DEFINE_RB_FUNCS2(name, type, keyfld, cmpexp, keyexp, \
	246	lookup_param_type, nodefld) \
	247	DEFINE_RB_INSDEL_FUNCS2(name, type, keyfld, cmpexp, keyexp, nodefld) \
	248	DEFINE_RB_LOOKUP_FUNC2(name, type, keyfld, cmpexp, keyexp, \
	249	lookup_param_type, nodefld)
	250
	251	/*
	252	* Shorthands for integer keys.
	253	*/
	254	#define DEFINE_RB_INSDEL_FUNCS(name, type, keyfld, nodefld) \
	255	DEFINE_RB_INSDEL_FUNCS2(name, type, keyfld, RB_CMP3WAY, RB_BYVAL, nodefld)
	256
	257	#define DEFINE_RB_LOOKUP_FUNC(name, type, keyfld, nodefld) \
	258	extern type __lookup_##name##_key; \
	259	DEFINE_RB_LOOKUP_FUNC2(name, type, keyfld, RB_CMP3WAY, RB_BYVAL, \
	260	typeof(__lookup_##name##_key.keyfld), nodefld)
	261
fcd00b68 ID	262	#define DEFINE_RB_FUNCS(name, type, keyfld, nodefld) \
	263	DEFINE_RB_INSDEL_FUNCS(name, type, keyfld, nodefld) \
	264	DEFINE_RB_LOOKUP_FUNC(name, type, keyfld, nodefld)
	265
eeb0bed5 ID	266	extern struct kmem_cache *ceph_inode_cachep;
eeb0bed5 ID	267	extern struct kmem_cache *ceph_cap_cachep;
f66fd9f0	268	extern struct kmem_cache *ceph_cap_flush_cachep;
eeb0bed5 ID	269	extern struct kmem_cache *ceph_dentry_cachep;
	270	extern struct kmem_cache *ceph_file_cachep;
	271
3d14c5d2	272	/* ceph_common.c */
72fe25e3 AE	273	extern bool libceph_compatible(void *data);
72fe25e3 AE	274
3d14c5d2 YS	275	extern const char *ceph_msg_type_name(int type);
3d14c5d2 YS	276	extern int ceph_check_fsid(struct ceph_client client, struct ceph_fsid fsid);
eeb0bed5	277	extern void *ceph_kvmalloc(size_t size, gfp_t flags);
3d14c5d2	278
ee57741c	279	extern struct ceph_options ceph_parse_options(char options,
3d14c5d2 YS	280	const char dev_name, const char dev_name_end,
	281	int (parse_extra_token)(char c, void *private),
	282	void *private);
ff40f9ae	283	int ceph_print_client_options(struct seq_file m, struct ceph_client client);
3d14c5d2 YS	284	extern void ceph_destroy_options(struct ceph_options *opt);
	285	extern int ceph_compare_options(struct ceph_options *new_opt,
	286	struct ceph_client *client);
74da4a0f	287	struct ceph_client ceph_create_client(struct ceph_options opt, void *private);
005a07bf	288	struct ceph_entity_addr ceph_client_addr(struct ceph_client client);
033268a5	289	u64 ceph_client_gid(struct ceph_client *client);
3d14c5d2 YS	290	extern void ceph_destroy_client(struct ceph_client *client);
	291	extern int __ceph_open_session(struct ceph_client *client,
	292	unsigned long started);
	293	extern int ceph_open_session(struct ceph_client *client);
84f1e956 ID	294	int ceph_wait_for_latest_osdmap(struct ceph_client *client,
84f1e956 ID	295	unsigned long timeout);
3d14c5d2 YS	296
	297	/* pagevec.c */
	298	extern void ceph_release_page_vector(struct page **pages, int num_pages);
	299
b324814e	300	extern struct page *ceph_get_direct_page_vector(const void __user data,
b6aa5901 HC	301	int num_pages,
	302	bool write_page);
	303	extern void ceph_put_page_vector(struct page **pages, int num_pages,
	304	bool dirty);
3d14c5d2 YS	305	extern struct page **ceph_alloc_page_vector(int num_pages, gfp_t flags);
3d14c5d2 YS	306	extern int ceph_copy_user_to_page_vector(struct page **pages,
b324814e	307	const void __user *data,
3d14c5d2	308	loff_t off, size_t len);
903bb32e	309	extern void ceph_copy_to_page_vector(struct page **pages,
b324814e	310	const void *data,
3d14c5d2	311	loff_t off, size_t len);
903bb32e	312	extern void ceph_copy_from_page_vector(struct page **pages,
b324814e	313	void *data,
3d14c5d2	314	loff_t off, size_t len);
3d14c5d2 YS	315	extern void ceph_zero_page_vector_range(int off, int len, struct page **pages);
	316
	317
	318	#endif /* _FS_CEPH_SUPER_H */