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#include <linux/ceph/ceph_debug.h>
#include <linux/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 (msgr1) */#define CEPH_OPT_TCP_NODELAY (1<<4) /* TCP_NODELAY on TCP sockets */#define CEPH_OPT_NOMSGSIGN (1<<5) /* don't sign msgs (msgr1) */#define CEPH_OPT_ABORT_ON_FULL (1<<6) /* abort w/ ENOSPC when full */#define CEPH_OPT_RXBOUNCE (1<<7) /* double-buffer read data */
#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 */ u32 read_from_replica; /* CEPH_OSD_FLAG_BALANCE/LOCALIZE_READS */ int con_modes[2]; /* CEPH_CON_MODE_* */
/* * 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; struct rb_root crush_locs;};
/* * 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_READ_FROM_REPLICA_DEFAULT 0 /* read from primary */
#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_CONTROL_LEN (16*1024*1024)#define CEPH_MSG_MAX_FRONT_LEN (16*1024*1024)#define CEPH_MSG_MAX_MIDDLE_LEN (16*1024*1024)
/* * The largest possible rbd data object is 32M. * The largest possible rbd object map object is 64M. * * 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 (64*1024*1024)
#define CEPH_AUTH_NAME_DEFAULT "guest"
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)
static inline bool ceph_msgr2(struct ceph_client *client){ return client->options->con_modes[0] != CEPH_CON_MODE_UNKNOWN;}
/* * 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 bool __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 \ return false; \ } \ \ rb_link_node(&t->nodefld, parent, n); \ rb_insert_color(&t->nodefld, root); \ return true; \} \static void __maybe_unused insert_##name(struct rb_root *root, type *t) \{ \ if (!__insert_##name(root, t)) \ BUG(); \} \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_snap_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;extern struct kmem_cache *ceph_mds_request_cachep;extern mempool_t *ceph_wb_pagevec_pool;
/* 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 int ceph_parse_fsid(const char *str, struct ceph_fsid *fsid);
struct fs_parameter;struct fc_log;struct ceph_options *ceph_alloc_options(void);int ceph_parse_mon_ips(const char *buf, size_t len, struct ceph_options *opt, struct fc_log *l, char delim);int ceph_parse_param(struct fs_parameter *param, struct ceph_options *opt, struct fc_log *l);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 void ceph_reset_client_addr(struct ceph_client *client);extern int __ceph_open_session(struct ceph_client *client);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_alloc_page_vector(int num_pages, gfp_t flags);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 */