[linux-2.6-block.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_ABORT_ON_FULL	  (1<<7) /* abort w/ ENOSPC when full */

#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
	 * 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;
extern struct kmem_cache *ceph_dir_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,
			      bool show_all);
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);

/* 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 */
02b2f549	38	#define CEPH_OPT_ABORT_ON_FULL (1<<7) /* abort w/ ENOSPC when full */
3d14c5d2	39
ba988f87	40	#define CEPH_OPT_DEFAULT (CEPH_OPT_TCP_NODELAY)
3d14c5d2 YS	41
	42	#define ceph_set_opt(client, opt) \
	43	(client)->options->flags \|= CEPH_OPT_##opt;
	44	#define ceph_test_opt(client, opt) \
	45	(!!((client)->options->flags & CEPH_OPT_##opt))
	46
	47	struct ceph_options {
	48	int flags;
	49	struct ceph_fsid fsid;
	50	struct ceph_entity_addr my_addr;
a319bf56 ID	51	unsigned long mount_timeout; /* jiffies */
	52	unsigned long osd_idle_ttl; /* jiffies */
	53	unsigned long osd_keepalive_timeout; /* jiffies */
7cc5e38f	54	unsigned long osd_request_timeout; /* jiffies */
3d14c5d2 YS	55
3d14c5d2 YS	56	/*
02b2f549	57	* any type that can't be simply compared or doesn't need
3d14c5d2 YS	58	* to be compared should go beyond this point,
	59	* ceph_compare_options() should be updated accordingly
	60	*/
	61
	62	struct ceph_entity_addr mon_addr; / should be the first
	63	pointer type of args */
	64	int num_mon;
	65	char *name;
8323c3aa	66	struct ceph_crypto_key *key;
3d14c5d2 YS	67	};
	68
	69	/*
	70	* defaults
	71	*/
a319bf56 ID	72	#define CEPH_MOUNT_TIMEOUT_DEFAULT msecs_to_jiffies(60 * 1000)
	73	#define CEPH_OSD_KEEPALIVE_DEFAULT msecs_to_jiffies(5 * 1000)
	74	#define CEPH_OSD_IDLE_TTL_DEFAULT msecs_to_jiffies(60 * 1000)
7cc5e38f	75	#define CEPH_OSD_REQUEST_TIMEOUT_DEFAULT 0 /* no timeout */
58d81b12	76
168b9090	77	#define CEPH_MONC_HUNT_INTERVAL msecs_to_jiffies(3 * 1000)
58d81b12 ID	78	#define CEPH_MONC_PING_INTERVAL msecs_to_jiffies(10 * 1000)
58d81b12 ID	79	#define CEPH_MONC_PING_TIMEOUT msecs_to_jiffies(30 * 1000)
168b9090 ID	80	#define CEPH_MONC_HUNT_BACKOFF 2
168b9090 ID	81	#define CEPH_MONC_HUNT_MAX_MULT 10
3d14c5d2 YS	82
3d14c5d2 YS	83	#define CEPH_MSG_MAX_FRONT_LEN (1610241024)
7b11ba37	84	#define CEPH_MSG_MAX_MIDDLE_LEN (1610241024)
94e6992b ID	85
	86	/*
	87	* Handle the largest possible rbd object in one message.
	88	* There is no limit on the size of cephfs objects, but it has to obey
	89	* rsize and wsize mount options anyway.
	90	*/
	91	#define CEPH_MSG_MAX_DATA_LEN (3210241024)
3d14c5d2 YS	92
	93	#define CEPH_AUTH_NAME_DEFAULT "guest"
	94
3d14c5d2 YS	95	/* mount state */
	96	enum {
	97	CEPH_MOUNT_MOUNTING,
	98	CEPH_MOUNT_MOUNTED,
	99	CEPH_MOUNT_UNMOUNTING,
	100	CEPH_MOUNT_UNMOUNTED,
	101	CEPH_MOUNT_SHUTDOWN,
	102	};
	103
a319bf56 ID	104	static inline unsigned long ceph_timeout_jiffies(unsigned long timeout)
	105	{
	106	return timeout ?: MAX_SCHEDULE_TIMEOUT;
	107	}
	108
3d14c5d2 YS	109	struct ceph_mds_client;
	110
	111	/*
	112	* per client state
	113	*
	114	* possibly shared by multiple mount points, if they are
	115	* mounting the same ceph filesystem/cluster.
	116	*/
	117	struct ceph_client {
	118	struct ceph_fsid fsid;
	119	bool have_fsid;
	120
	121	void *private;
	122
	123	struct ceph_options *options;
	124
	125	struct mutex mount_mutex; /* serialize mount attempts */
	126	wait_queue_head_t auth_wq;
	127	int auth_err;
	128
	129	int (extra_mon_dispatch)(struct ceph_client , struct ceph_msg *);
	130
12b4629a ID	131	u64 supported_features;
12b4629a ID	132	u64 required_features;
3d14c5d2	133
15d9882c	134	struct ceph_messenger msgr; /* messenger instance */
3d14c5d2 YS	135	struct ceph_mon_client monc;
	136	struct ceph_osd_client osdc;
	137
	138	#ifdef CONFIG_DEBUG_FS
	139	struct dentry *debugfs_dir;
	140	struct dentry *debugfs_monmap;
	141	struct dentry *debugfs_osdmap;
5cf7bd30	142	struct dentry *debugfs_options;
3d14c5d2 YS	143	#endif
	144	};
	145
859bff51	146	#define from_msgr(ms) container_of(ms, struct ceph_client, msgr)
3d14c5d2 YS	147
	148
	149	/*
	150	* snapshots
	151	*/
	152
	153	/*
	154	* A "snap context" is the set of existing snapshots when we
	155	* write data. It is used by the OSD to guide its COW behavior.
	156	*
	157	* The ceph_snap_context is refcounted, and attached to each dirty
	158	* page, indicating which context the dirty data belonged when it was
	159	* dirtied.
	160	*/
	161	struct ceph_snap_context {
06dfa963	162	refcount_t nref;
3d14c5d2	163	u64 seq;
aa711ee3	164	u32 num_snaps;
3d14c5d2 YS	165	u64 snaps[];
	166	};
	167
4f0dcb10 AE	168	extern struct ceph_snap_context *ceph_create_snap_context(u32 snap_count,
	169	gfp_t gfp_flags);
	170	extern struct ceph_snap_context *ceph_get_snap_context(
	171	struct ceph_snap_context *sc);
	172	extern void ceph_put_snap_context(struct ceph_snap_context *sc);
3d14c5d2 YS	173
	174	/*
	175	* calculate the number of pages a given length and offset map onto,
	176	* if we align the data.
	177	*/
	178	static inline int calc_pages_for(u64 off, u64 len)
	179	{
09cbfeaf KS	180	return ((off+len+PAGE_SIZE-1) >> PAGE_SHIFT) -
09cbfeaf KS	181	(off >> PAGE_SHIFT);
3d14c5d2 YS	182	}
3d14c5d2 YS	183
76f827a7 ID	184	#define RB_BYVAL(a) (a)
	185	#define RB_BYPTR(a) (&(a))
	186	#define RB_CMP3WAY(a, b) ((a) < (b) ? -1 : (a) > (b))
	187
	188	#define DEFINE_RB_INSDEL_FUNCS2(name, type, keyfld, cmpexp, keyexp, nodefld) \
fcd00b68 ID	189	static void insert_##name(struct rb_root root, type t) \
	190	{ \
	191	struct rb_node **n = &root->rb_node; \
	192	struct rb_node *parent = NULL; \
	193	\
	194	BUG_ON(!RB_EMPTY_NODE(&t->nodefld)); \
	195	\
	196	while (*n) { \
	197	type cur = rb_entry(n, type, nodefld); \
76f827a7	198	int cmp; \
fcd00b68 ID	199	\
fcd00b68 ID	200	parent = *n; \
76f827a7 ID	201	cmp = cmpexp(keyexp(t->keyfld), keyexp(cur->keyfld)); \
76f827a7 ID	202	if (cmp < 0) \
fcd00b68	203	n = &(*n)->rb_left; \
76f827a7	204	else if (cmp > 0) \
fcd00b68 ID	205	n = &(*n)->rb_right; \
	206	else \
	207	BUG(); \
	208	} \
	209	\
	210	rb_link_node(&t->nodefld, parent, n); \
	211	rb_insert_color(&t->nodefld, root); \
	212	} \
	213	static void erase_##name(struct rb_root root, type t) \
	214	{ \
	215	BUG_ON(RB_EMPTY_NODE(&t->nodefld)); \
	216	rb_erase(&t->nodefld, root); \
	217	RB_CLEAR_NODE(&t->nodefld); \
	218	}
	219
76f827a7 ID	220	/*
	221	* @lookup_param_type is a parameter and not constructed from (@type,
	222	* @keyfld) with typeof() because adding const is too unwieldy.
	223	*/
	224	#define DEFINE_RB_LOOKUP_FUNC2(name, type, keyfld, cmpexp, keyexp, \
	225	lookup_param_type, nodefld) \
	226	static type lookup_##name(struct rb_root root, lookup_param_type key) \
fcd00b68 ID	227	{ \
	228	struct rb_node *n = root->rb_node; \
	229	\
	230	while (n) { \
	231	type *cur = rb_entry(n, type, nodefld); \
76f827a7	232	int cmp; \
fcd00b68	233	\
76f827a7 ID	234	cmp = cmpexp(key, keyexp(cur->keyfld)); \
76f827a7 ID	235	if (cmp < 0) \
fcd00b68	236	n = n->rb_left; \
76f827a7	237	else if (cmp > 0) \
fcd00b68 ID	238	n = n->rb_right; \
	239	else \
	240	return cur; \
	241	} \
	242	\
	243	return NULL; \
	244	}
	245
76f827a7 ID	246	#define DEFINE_RB_FUNCS2(name, type, keyfld, cmpexp, keyexp, \
	247	lookup_param_type, nodefld) \
	248	DEFINE_RB_INSDEL_FUNCS2(name, type, keyfld, cmpexp, keyexp, nodefld) \
	249	DEFINE_RB_LOOKUP_FUNC2(name, type, keyfld, cmpexp, keyexp, \
	250	lookup_param_type, nodefld)
	251
	252	/*
	253	* Shorthands for integer keys.
	254	*/
	255	#define DEFINE_RB_INSDEL_FUNCS(name, type, keyfld, nodefld) \
	256	DEFINE_RB_INSDEL_FUNCS2(name, type, keyfld, RB_CMP3WAY, RB_BYVAL, nodefld)
	257
	258	#define DEFINE_RB_LOOKUP_FUNC(name, type, keyfld, nodefld) \
	259	extern type __lookup_##name##_key; \
	260	DEFINE_RB_LOOKUP_FUNC2(name, type, keyfld, RB_CMP3WAY, RB_BYVAL, \
	261	typeof(__lookup_##name##_key.keyfld), nodefld)
	262
fcd00b68 ID	263	#define DEFINE_RB_FUNCS(name, type, keyfld, nodefld) \
	264	DEFINE_RB_INSDEL_FUNCS(name, type, keyfld, nodefld) \
	265	DEFINE_RB_LOOKUP_FUNC(name, type, keyfld, nodefld)
	266
eeb0bed5 ID	267	extern struct kmem_cache *ceph_inode_cachep;
eeb0bed5 ID	268	extern struct kmem_cache *ceph_cap_cachep;
f66fd9f0	269	extern struct kmem_cache *ceph_cap_flush_cachep;
eeb0bed5 ID	270	extern struct kmem_cache *ceph_dentry_cachep;
eeb0bed5 ID	271	extern struct kmem_cache *ceph_file_cachep;
bb48bd4d	272	extern struct kmem_cache *ceph_dir_file_cachep;
eeb0bed5	273
3d14c5d2	274	/* ceph_common.c */
72fe25e3 AE	275	extern bool libceph_compatible(void *data);
72fe25e3 AE	276
3d14c5d2 YS	277	extern const char *ceph_msg_type_name(int type);
3d14c5d2 YS	278	extern int ceph_check_fsid(struct ceph_client client, struct ceph_fsid fsid);
eeb0bed5	279	extern void *ceph_kvmalloc(size_t size, gfp_t flags);
3d14c5d2	280
ee57741c	281	extern struct ceph_options ceph_parse_options(char options,
3d14c5d2 YS	282	const char dev_name, const char dev_name_end,
	283	int (parse_extra_token)(char c, void *private),
	284	void *private);
02b2f549 DY	285	int ceph_print_client_options(struct seq_file m, struct ceph_client client,
02b2f549 DY	286	bool show_all);
3d14c5d2 YS	287	extern void ceph_destroy_options(struct ceph_options *opt);
	288	extern int ceph_compare_options(struct ceph_options *new_opt,
	289	struct ceph_client *client);
74da4a0f	290	struct ceph_client ceph_create_client(struct ceph_options opt, void *private);
005a07bf	291	struct ceph_entity_addr ceph_client_addr(struct ceph_client client);
033268a5	292	u64 ceph_client_gid(struct ceph_client *client);
3d14c5d2 YS	293	extern void ceph_destroy_client(struct ceph_client *client);
	294	extern int __ceph_open_session(struct ceph_client *client,
	295	unsigned long started);
	296	extern int ceph_open_session(struct ceph_client *client);
	297
	298	/* pagevec.c */
	299	extern void ceph_release_page_vector(struct page **pages, int num_pages);
	300
b324814e	301	extern struct page *ceph_get_direct_page_vector(const void __user data,
b6aa5901 HC	302	int num_pages,
	303	bool write_page);
	304	extern void ceph_put_page_vector(struct page **pages, int num_pages,
	305	bool dirty);
3d14c5d2 YS	306	extern struct page **ceph_alloc_page_vector(int num_pages, gfp_t flags);
3d14c5d2 YS	307	extern int ceph_copy_user_to_page_vector(struct page **pages,
b324814e	308	const void __user *data,
3d14c5d2	309	loff_t off, size_t len);
903bb32e	310	extern void ceph_copy_to_page_vector(struct page **pages,
b324814e	311	const void *data,
3d14c5d2	312	loff_t off, size_t len);
903bb32e	313	extern void ceph_copy_from_page_vector(struct page **pages,
b324814e	314	void *data,
3d14c5d2	315	loff_t off, size_t len);
3d14c5d2 YS	316	extern void ceph_zero_page_vector_range(int off, int len, struct page **pages);
	317
	318
	319	#endif /* _FS_CEPH_SUPER_H */