304 lines
8.9 KiB
C
304 lines
8.9 KiB
C
|
#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/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 */
|
||
|
|
|
||
|
|
/*
|
||
|
|
* 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_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"
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Delay telling the MDS we no longer want caps, in case we reopen
|
||
|
|
* the file. Delay a minimum amount of time, even if we send a cap
|
||
|
|
* message for some other reason. Otherwise, take the oppotunity to
|
||
|
|
* update the mds to avoid sending another message later.
|
||
|
|
*/
|
||
|
|
#define CEPH_CAPS_WANTED_DELAY_MIN_DEFAULT 5 /* cap release delay */
|
||
|
|
#define CEPH_CAPS_WANTED_DELAY_MAX_DEFAULT 60 /* cap release delay */
|
||
|
|
|
||
|
|
#define CEPH_CAP_RELEASE_SAFETY_DEFAULT (CEPH_CAPS_PER_RELEASE * 4)
|
||
|
|
|
||
|
|
/* 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 {
|
||
|
|
atomic_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);
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* These are not meant to be generic - an integer key is assumed.
|
||
|
|
*/
|
||
|
|
#define DEFINE_RB_INSDEL_FUNCS(name, type, keyfld, 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); \
|
||
|
|
\
|
||
|
|
parent = *n; \
|
||
|
|
if (t->keyfld < cur->keyfld) \
|
||
|
|
n = &(*n)->rb_left; \
|
||
|
|
else if (t->keyfld > cur->keyfld) \
|
||
|
|
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); \
|
||
|
|
}
|
||
|
|
|
||
|
|
#define DEFINE_RB_LOOKUP_FUNC(name, type, keyfld, nodefld) \
|
||
|
|
extern type __lookup_##name##_key; \
|
||
|
|
static type *lookup_##name(struct rb_root *root, \
|
||
|
|
typeof(__lookup_##name##_key.keyfld) key) \
|
||
|
|
{ \
|
||
|
|
struct rb_node *n = root->rb_node; \
|
||
|
|
\
|
||
|
|
while (n) { \
|
||
|
|
type *cur = rb_entry(n, type, nodefld); \
|
||
|
|
\
|
||
|
|
if (key < cur->keyfld) \
|
||
|
|
n = n->rb_left; \
|
||
|
|
else if (key > cur->keyfld) \
|
||
|
|
n = n->rb_right; \
|
||
|
|
else \
|
||
|
|
return cur; \
|
||
|
|
} \
|
||
|
|
\
|
||
|
|
return NULL; \
|
||
|
|
}
|
||
|
|
|
||
|
|
#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);
|
||
|
|
extern struct ceph_client *ceph_create_client(struct ceph_options *opt,
|
||
|
|
void *private,
|
||
|
|
u64 supported_features,
|
||
|
|
u64 required_features);
|
||
|
|
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 */
|