blob: 95bd8502e715e48f8222345e1274761fee030662 [file] [log] [blame]
#include "ceph_debug.h"
#include <asm/unaligned.h>
#include <linux/backing-dev.h>
#include <linux/completion.h>
#include <linux/exportfs.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 "types.h"
#include "messenger.h"
#include "msgpool.h"
#include "mon_client.h"
#include "osd_client.h"
#include "ceph_fs.h"
* Supported features
* 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_DEFAULT (0)
#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;
int mount_timeout;
int osd_idle_ttl;
int osd_timeout;
int osd_keepalive_timeout;
* 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_OSD_TIMEOUT_DEFAULT 60 /* seconds */
#define CEPH_MSG_MAX_FRONT_LEN (16*1024*1024)
#define CEPH_MSG_MAX_DATA_LEN (16*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 */
/* mount state */
enum {
* subtract jiffies
static inline unsigned long time_sub(unsigned long a, unsigned long b)
BUG_ON(time_after(b, a));
return (long)a - (long)b;
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 *);
u32 supported_features;
u32 required_features;
struct ceph_messenger *msgr; /* messenger instance */
struct ceph_mon_client monc;
struct ceph_osd_client osdc;
struct dentry *debugfs_dir;
struct dentry *debugfs_monmap;
struct dentry *debugfs_osdmap;
* 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;
int num_snaps;
u64 snaps[];
static inline struct ceph_snap_context *
ceph_get_snap_context(struct ceph_snap_context *sc)
printk("get_snap_context %p %d -> %d\n", sc, atomic_read(&sc->nref),
if (sc)
return sc;
static inline void ceph_put_snap_context(struct ceph_snap_context *sc)
if (!sc)
printk("put_snap_context %p %d -> %d\n", sc, atomic_read(&sc->nref),
if (atomic_dec_and_test(&sc->nref)) {
/*printk(" deleting snap_context %p\n", 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_CACHE_SIZE-1) >> PAGE_CACHE_SHIFT) -
/* ceph_common.c */
extern const char *ceph_msg_type_name(int type);
extern int ceph_check_fsid(struct ceph_client *client, struct ceph_fsid *fsid);
extern struct kmem_cache *ceph_inode_cachep;
extern struct kmem_cache *ceph_cap_cachep;
extern struct kmem_cache *ceph_dentry_cachep;
extern struct kmem_cache *ceph_file_cachep;
extern int ceph_parse_options(struct ceph_options **popt, char *options,
const char *dev_name, const char *dev_name_end,
int (*parse_extra_token)(char *c, void *private),
void *private);
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,
unsigned supported_features,
unsigned required_features);
extern u64 ceph_client_id(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 char __user *data,
int num_pages,
bool write_page);
extern void ceph_put_page_vector(struct page **pages, int num_pages,
bool dirty);
extern void ceph_release_page_vector(struct page **pages, int num_pages);
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 char __user *data,
loff_t off, size_t len);
extern int ceph_copy_to_page_vector(struct page **pages,
const char *data,
loff_t off, size_t len);
extern int ceph_copy_from_page_vector(struct page **pages,
char *data,
loff_t off, size_t len);
extern int ceph_copy_page_vector_to_user(struct page **pages, char __user *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 */