589 строки
18 KiB
C
589 строки
18 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef _FS_CEPH_MDS_CLIENT_H
|
|
#define _FS_CEPH_MDS_CLIENT_H
|
|
|
|
#include <linux/completion.h>
|
|
#include <linux/kref.h>
|
|
#include <linux/list.h>
|
|
#include <linux/mutex.h>
|
|
#include <linux/rbtree.h>
|
|
#include <linux/spinlock.h>
|
|
#include <linux/refcount.h>
|
|
#include <linux/utsname.h>
|
|
#include <linux/ktime.h>
|
|
|
|
#include <linux/ceph/types.h>
|
|
#include <linux/ceph/messenger.h>
|
|
#include <linux/ceph/mdsmap.h>
|
|
#include <linux/ceph/auth.h>
|
|
|
|
#include "metric.h"
|
|
#include "super.h"
|
|
|
|
/* The first 8 bits are reserved for old ceph releases */
|
|
enum ceph_feature_type {
|
|
CEPHFS_FEATURE_MIMIC = 8,
|
|
CEPHFS_FEATURE_REPLY_ENCODING,
|
|
CEPHFS_FEATURE_RECLAIM_CLIENT,
|
|
CEPHFS_FEATURE_LAZY_CAP_WANTED,
|
|
CEPHFS_FEATURE_MULTI_RECONNECT,
|
|
CEPHFS_FEATURE_DELEG_INO,
|
|
CEPHFS_FEATURE_METRIC_COLLECT,
|
|
CEPHFS_FEATURE_ALTERNATE_NAME,
|
|
CEPHFS_FEATURE_NOTIFY_SESSION_STATE,
|
|
CEPHFS_FEATURE_OP_GETVXATTR,
|
|
|
|
CEPHFS_FEATURE_MAX = CEPHFS_FEATURE_OP_GETVXATTR,
|
|
};
|
|
|
|
#define CEPHFS_FEATURES_CLIENT_SUPPORTED { \
|
|
0, 1, 2, 3, 4, 5, 6, 7, \
|
|
CEPHFS_FEATURE_MIMIC, \
|
|
CEPHFS_FEATURE_REPLY_ENCODING, \
|
|
CEPHFS_FEATURE_LAZY_CAP_WANTED, \
|
|
CEPHFS_FEATURE_MULTI_RECONNECT, \
|
|
CEPHFS_FEATURE_DELEG_INO, \
|
|
CEPHFS_FEATURE_METRIC_COLLECT, \
|
|
CEPHFS_FEATURE_NOTIFY_SESSION_STATE, \
|
|
CEPHFS_FEATURE_OP_GETVXATTR, \
|
|
}
|
|
|
|
/*
|
|
* Some lock dependencies:
|
|
*
|
|
* session->s_mutex
|
|
* mdsc->mutex
|
|
*
|
|
* mdsc->snap_rwsem
|
|
*
|
|
* ci->i_ceph_lock
|
|
* mdsc->snap_flush_lock
|
|
* mdsc->cap_delay_lock
|
|
*
|
|
*/
|
|
|
|
struct ceph_fs_client;
|
|
struct ceph_cap;
|
|
|
|
/*
|
|
* parsed info about a single inode. pointers are into the encoded
|
|
* on-wire structures within the mds reply message payload.
|
|
*/
|
|
struct ceph_mds_reply_info_in {
|
|
struct ceph_mds_reply_inode *in;
|
|
struct ceph_dir_layout dir_layout;
|
|
u32 symlink_len;
|
|
char *symlink;
|
|
u32 xattr_len;
|
|
char *xattr_data;
|
|
u64 inline_version;
|
|
u32 inline_len;
|
|
char *inline_data;
|
|
u32 pool_ns_len;
|
|
char *pool_ns_data;
|
|
u64 max_bytes;
|
|
u64 max_files;
|
|
s32 dir_pin;
|
|
struct ceph_timespec btime;
|
|
struct ceph_timespec snap_btime;
|
|
u64 rsnaps;
|
|
u64 change_attr;
|
|
};
|
|
|
|
struct ceph_mds_reply_dir_entry {
|
|
char *name;
|
|
u32 name_len;
|
|
struct ceph_mds_reply_lease *lease;
|
|
struct ceph_mds_reply_info_in inode;
|
|
loff_t offset;
|
|
};
|
|
|
|
struct ceph_mds_reply_xattr {
|
|
char *xattr_value;
|
|
size_t xattr_value_len;
|
|
};
|
|
|
|
/*
|
|
* parsed info about an mds reply, including information about
|
|
* either: 1) the target inode and/or its parent directory and dentry,
|
|
* and directory contents (for readdir results), or
|
|
* 2) the file range lock info (for fcntl F_GETLK results).
|
|
*/
|
|
struct ceph_mds_reply_info_parsed {
|
|
struct ceph_mds_reply_head *head;
|
|
|
|
/* trace */
|
|
struct ceph_mds_reply_info_in diri, targeti;
|
|
struct ceph_mds_reply_dirfrag *dirfrag;
|
|
char *dname;
|
|
u32 dname_len;
|
|
struct ceph_mds_reply_lease *dlease;
|
|
struct ceph_mds_reply_xattr xattr_info;
|
|
|
|
/* extra */
|
|
union {
|
|
/* for fcntl F_GETLK results */
|
|
struct ceph_filelock *filelock_reply;
|
|
|
|
/* for readdir results */
|
|
struct {
|
|
struct ceph_mds_reply_dirfrag *dir_dir;
|
|
size_t dir_buf_size;
|
|
int dir_nr;
|
|
bool dir_end;
|
|
bool dir_complete;
|
|
bool hash_order;
|
|
bool offset_hash;
|
|
struct ceph_mds_reply_dir_entry *dir_entries;
|
|
};
|
|
|
|
/* for create results */
|
|
struct {
|
|
bool has_create_ino;
|
|
u64 ino;
|
|
};
|
|
};
|
|
|
|
/* encoded blob describing snapshot contexts for certain
|
|
operations (e.g., open) */
|
|
void *snapblob;
|
|
int snapblob_len;
|
|
};
|
|
|
|
|
|
/*
|
|
* cap releases are batched and sent to the MDS en masse.
|
|
*
|
|
* Account for per-message overhead of mds_cap_release header
|
|
* and __le32 for osd epoch barrier trailing field.
|
|
*/
|
|
#define CEPH_CAPS_PER_RELEASE ((PAGE_SIZE - sizeof(u32) - \
|
|
sizeof(struct ceph_mds_cap_release)) / \
|
|
sizeof(struct ceph_mds_cap_item))
|
|
|
|
|
|
/*
|
|
* state associated with each MDS<->client session
|
|
*/
|
|
enum {
|
|
CEPH_MDS_SESSION_NEW = 1,
|
|
CEPH_MDS_SESSION_OPENING = 2,
|
|
CEPH_MDS_SESSION_OPEN = 3,
|
|
CEPH_MDS_SESSION_HUNG = 4,
|
|
CEPH_MDS_SESSION_RESTARTING = 5,
|
|
CEPH_MDS_SESSION_RECONNECTING = 6,
|
|
CEPH_MDS_SESSION_CLOSING = 7,
|
|
CEPH_MDS_SESSION_CLOSED = 8,
|
|
CEPH_MDS_SESSION_REJECTED = 9,
|
|
};
|
|
|
|
struct ceph_mds_session {
|
|
struct ceph_mds_client *s_mdsc;
|
|
int s_mds;
|
|
int s_state;
|
|
unsigned long s_ttl; /* time until mds kills us */
|
|
unsigned long s_features;
|
|
u64 s_seq; /* incoming msg seq # */
|
|
struct mutex s_mutex; /* serialize session messages */
|
|
|
|
struct ceph_connection s_con;
|
|
|
|
struct ceph_auth_handshake s_auth;
|
|
|
|
atomic_t s_cap_gen; /* inc each time we get mds stale msg */
|
|
unsigned long s_cap_ttl; /* when session caps expire. protected by s_mutex */
|
|
|
|
/* protected by s_cap_lock */
|
|
spinlock_t s_cap_lock;
|
|
refcount_t s_ref;
|
|
struct list_head s_caps; /* all caps issued by this session */
|
|
struct ceph_cap *s_cap_iterator;
|
|
int s_nr_caps;
|
|
int s_num_cap_releases;
|
|
int s_cap_reconnect;
|
|
int s_readonly;
|
|
struct list_head s_cap_releases; /* waiting cap_release messages */
|
|
struct work_struct s_cap_release_work;
|
|
|
|
/* See ceph_inode_info->i_dirty_item. */
|
|
struct list_head s_cap_dirty; /* inodes w/ dirty caps */
|
|
|
|
/* See ceph_inode_info->i_flushing_item. */
|
|
struct list_head s_cap_flushing; /* inodes w/ flushing caps */
|
|
|
|
unsigned long s_renew_requested; /* last time we sent a renew req */
|
|
u64 s_renew_seq;
|
|
|
|
struct list_head s_waiting; /* waiting requests */
|
|
struct list_head s_unsafe; /* unsafe requests */
|
|
struct xarray s_delegated_inos;
|
|
};
|
|
|
|
/*
|
|
* modes of choosing which MDS to send a request to
|
|
*/
|
|
enum {
|
|
USE_ANY_MDS,
|
|
USE_RANDOM_MDS,
|
|
USE_AUTH_MDS, /* prefer authoritative mds for this metadata item */
|
|
};
|
|
|
|
struct ceph_mds_request;
|
|
struct ceph_mds_client;
|
|
|
|
/*
|
|
* request completion callback
|
|
*/
|
|
typedef void (*ceph_mds_request_callback_t) (struct ceph_mds_client *mdsc,
|
|
struct ceph_mds_request *req);
|
|
/*
|
|
* wait for request completion callback
|
|
*/
|
|
typedef int (*ceph_mds_request_wait_callback_t) (struct ceph_mds_client *mdsc,
|
|
struct ceph_mds_request *req);
|
|
|
|
/*
|
|
* an in-flight mds request
|
|
*/
|
|
struct ceph_mds_request {
|
|
u64 r_tid; /* transaction id */
|
|
struct rb_node r_node;
|
|
struct ceph_mds_client *r_mdsc;
|
|
|
|
struct kref r_kref;
|
|
int r_op; /* mds op code */
|
|
|
|
/* operation on what? */
|
|
struct inode *r_inode; /* arg1 */
|
|
struct dentry *r_dentry; /* arg1 */
|
|
struct dentry *r_old_dentry; /* arg2: rename from or link from */
|
|
struct inode *r_old_dentry_dir; /* arg2: old dentry's parent dir */
|
|
char *r_path1, *r_path2;
|
|
struct ceph_vino r_ino1, r_ino2;
|
|
|
|
struct inode *r_parent; /* parent dir inode */
|
|
struct inode *r_target_inode; /* resulting inode */
|
|
|
|
#define CEPH_MDS_R_DIRECT_IS_HASH (1) /* r_direct_hash is valid */
|
|
#define CEPH_MDS_R_ABORTED (2) /* call was aborted */
|
|
#define CEPH_MDS_R_GOT_UNSAFE (3) /* got an unsafe reply */
|
|
#define CEPH_MDS_R_GOT_SAFE (4) /* got a safe reply */
|
|
#define CEPH_MDS_R_GOT_RESULT (5) /* got a result */
|
|
#define CEPH_MDS_R_DID_PREPOPULATE (6) /* prepopulated readdir */
|
|
#define CEPH_MDS_R_PARENT_LOCKED (7) /* is r_parent->i_rwsem wlocked? */
|
|
#define CEPH_MDS_R_ASYNC (8) /* async request */
|
|
unsigned long r_req_flags;
|
|
|
|
struct mutex r_fill_mutex;
|
|
|
|
union ceph_mds_request_args r_args;
|
|
int r_fmode; /* file mode, if expecting cap */
|
|
int r_request_release_offset;
|
|
const struct cred *r_cred;
|
|
struct timespec64 r_stamp;
|
|
|
|
/* for choosing which mds to send this request to */
|
|
int r_direct_mode;
|
|
u32 r_direct_hash; /* choose dir frag based on this dentry hash */
|
|
|
|
/* data payload is used for xattr ops */
|
|
struct ceph_pagelist *r_pagelist;
|
|
|
|
/* what caps shall we drop? */
|
|
int r_inode_drop, r_inode_unless;
|
|
int r_dentry_drop, r_dentry_unless;
|
|
int r_old_dentry_drop, r_old_dentry_unless;
|
|
struct inode *r_old_inode;
|
|
int r_old_inode_drop, r_old_inode_unless;
|
|
|
|
struct ceph_msg *r_request; /* original request */
|
|
struct ceph_msg *r_reply;
|
|
struct ceph_mds_reply_info_parsed r_reply_info;
|
|
int r_err;
|
|
u32 r_readdir_offset;
|
|
|
|
struct page *r_locked_page;
|
|
int r_dir_caps;
|
|
int r_num_caps;
|
|
|
|
unsigned long r_timeout; /* optional. jiffies, 0 is "wait forever" */
|
|
unsigned long r_started; /* start time to measure timeout against */
|
|
unsigned long r_start_latency; /* start time to measure latency */
|
|
unsigned long r_end_latency; /* finish time to measure latency */
|
|
unsigned long r_request_started; /* start time for mds request only,
|
|
used to measure lease durations */
|
|
|
|
/* link unsafe requests to parent directory, for fsync */
|
|
struct inode *r_unsafe_dir;
|
|
struct list_head r_unsafe_dir_item;
|
|
|
|
/* unsafe requests that modify the target inode */
|
|
struct list_head r_unsafe_target_item;
|
|
|
|
struct ceph_mds_session *r_session;
|
|
|
|
int r_attempts; /* resend attempts */
|
|
int r_num_fwd; /* number of forward attempts */
|
|
int r_resend_mds; /* mds to resend to next, if any*/
|
|
u32 r_sent_on_mseq; /* cap mseq request was sent at*/
|
|
u64 r_deleg_ino;
|
|
|
|
struct list_head r_wait;
|
|
struct completion r_completion;
|
|
struct completion r_safe_completion;
|
|
ceph_mds_request_callback_t r_callback;
|
|
struct list_head r_unsafe_item; /* per-session unsafe list item */
|
|
|
|
long long r_dir_release_cnt;
|
|
long long r_dir_ordered_cnt;
|
|
int r_readdir_cache_idx;
|
|
|
|
int r_feature_needed;
|
|
|
|
struct ceph_cap_reservation r_caps_reservation;
|
|
};
|
|
|
|
struct ceph_pool_perm {
|
|
struct rb_node node;
|
|
int perm;
|
|
s64 pool;
|
|
size_t pool_ns_len;
|
|
char pool_ns[];
|
|
};
|
|
|
|
struct ceph_snapid_map {
|
|
struct rb_node node;
|
|
struct list_head lru;
|
|
atomic_t ref;
|
|
u64 snap;
|
|
dev_t dev;
|
|
unsigned long last_used;
|
|
};
|
|
|
|
/*
|
|
* node for list of quotarealm inodes that are not visible from the filesystem
|
|
* mountpoint, but required to handle, e.g. quotas.
|
|
*/
|
|
struct ceph_quotarealm_inode {
|
|
struct rb_node node;
|
|
u64 ino;
|
|
unsigned long timeout; /* last time a lookup failed for this inode */
|
|
struct mutex mutex;
|
|
struct inode *inode;
|
|
};
|
|
|
|
struct cap_wait {
|
|
struct list_head list;
|
|
u64 ino;
|
|
pid_t tgid;
|
|
int need;
|
|
int want;
|
|
};
|
|
|
|
/*
|
|
* mds client state
|
|
*/
|
|
struct ceph_mds_client {
|
|
struct ceph_fs_client *fsc;
|
|
struct mutex mutex; /* all nested structures */
|
|
|
|
struct ceph_mdsmap *mdsmap;
|
|
struct completion safe_umount_waiters;
|
|
wait_queue_head_t session_close_wq;
|
|
struct list_head waiting_for_map;
|
|
int mdsmap_err;
|
|
|
|
struct ceph_mds_session **sessions; /* NULL for mds if no session */
|
|
atomic_t num_sessions;
|
|
int max_sessions; /* len of sessions array */
|
|
int stopping; /* true if shutting down */
|
|
|
|
atomic64_t quotarealms_count; /* # realms with quota */
|
|
/*
|
|
* We keep a list of inodes we don't see in the mountpoint but that we
|
|
* need to track quota realms.
|
|
*/
|
|
struct rb_root quotarealms_inodes;
|
|
struct mutex quotarealms_inodes_mutex;
|
|
|
|
/*
|
|
* snap_rwsem will cover cap linkage into snaprealms, and
|
|
* realm snap contexts. (later, we can do per-realm snap
|
|
* contexts locks..) the empty list contains realms with no
|
|
* references (implying they contain no inodes with caps) that
|
|
* should be destroyed.
|
|
*/
|
|
u64 last_snap_seq;
|
|
struct rw_semaphore snap_rwsem;
|
|
struct rb_root snap_realms;
|
|
struct list_head snap_empty;
|
|
int num_snap_realms;
|
|
spinlock_t snap_empty_lock; /* protect snap_empty */
|
|
|
|
u64 last_tid; /* most recent mds request */
|
|
u64 oldest_tid; /* oldest incomplete mds request,
|
|
excluding setfilelock requests */
|
|
struct rb_root request_tree; /* pending mds requests */
|
|
struct delayed_work delayed_work; /* delayed work */
|
|
unsigned long last_renew_caps; /* last time we renewed our caps */
|
|
struct list_head cap_delay_list; /* caps with delayed release */
|
|
spinlock_t cap_delay_lock; /* protects cap_delay_list */
|
|
struct list_head snap_flush_list; /* cap_snaps ready to flush */
|
|
spinlock_t snap_flush_lock;
|
|
|
|
u64 last_cap_flush_tid;
|
|
struct list_head cap_flush_list;
|
|
struct list_head cap_dirty_migrating; /* ...that are migration... */
|
|
int num_cap_flushing; /* # caps we are flushing */
|
|
spinlock_t cap_dirty_lock; /* protects above items */
|
|
wait_queue_head_t cap_flushing_wq;
|
|
|
|
struct work_struct cap_reclaim_work;
|
|
atomic_t cap_reclaim_pending;
|
|
|
|
/*
|
|
* Cap reservations
|
|
*
|
|
* Maintain a global pool of preallocated struct ceph_caps, referenced
|
|
* by struct ceph_caps_reservations. This ensures that we preallocate
|
|
* memory needed to successfully process an MDS response. (If an MDS
|
|
* sends us cap information and we fail to process it, we will have
|
|
* problems due to the client and MDS being out of sync.)
|
|
*
|
|
* Reservations are 'owned' by a ceph_cap_reservation context.
|
|
*/
|
|
spinlock_t caps_list_lock;
|
|
struct list_head caps_list; /* unused (reserved or
|
|
unreserved) */
|
|
struct list_head cap_wait_list;
|
|
int caps_total_count; /* total caps allocated */
|
|
int caps_use_count; /* in use */
|
|
int caps_use_max; /* max used caps */
|
|
int caps_reserve_count; /* unused, reserved */
|
|
int caps_avail_count; /* unused, unreserved */
|
|
int caps_min_count; /* keep at least this many
|
|
(unreserved) */
|
|
spinlock_t dentry_list_lock;
|
|
struct list_head dentry_leases; /* fifo list */
|
|
struct list_head dentry_dir_leases; /* lru list */
|
|
|
|
struct ceph_client_metric metric;
|
|
|
|
spinlock_t snapid_map_lock;
|
|
struct rb_root snapid_map_tree;
|
|
struct list_head snapid_map_lru;
|
|
|
|
struct rw_semaphore pool_perm_rwsem;
|
|
struct rb_root pool_perm_tree;
|
|
|
|
char nodename[__NEW_UTS_LEN + 1];
|
|
};
|
|
|
|
extern const char *ceph_mds_op_name(int op);
|
|
|
|
extern bool check_session_state(struct ceph_mds_session *s);
|
|
void inc_session_sequence(struct ceph_mds_session *s);
|
|
|
|
extern struct ceph_mds_session *
|
|
__ceph_lookup_mds_session(struct ceph_mds_client *, int mds);
|
|
|
|
extern const char *ceph_session_state_name(int s);
|
|
|
|
extern struct ceph_mds_session *
|
|
ceph_get_mds_session(struct ceph_mds_session *s);
|
|
extern void ceph_put_mds_session(struct ceph_mds_session *s);
|
|
|
|
extern int ceph_send_msg_mds(struct ceph_mds_client *mdsc,
|
|
struct ceph_msg *msg, int mds);
|
|
|
|
extern int ceph_mdsc_init(struct ceph_fs_client *fsc);
|
|
extern void ceph_mdsc_close_sessions(struct ceph_mds_client *mdsc);
|
|
extern void ceph_mdsc_force_umount(struct ceph_mds_client *mdsc);
|
|
extern void ceph_mdsc_destroy(struct ceph_fs_client *fsc);
|
|
|
|
extern void ceph_mdsc_sync(struct ceph_mds_client *mdsc);
|
|
|
|
extern void ceph_invalidate_dir_request(struct ceph_mds_request *req);
|
|
extern int ceph_alloc_readdir_reply_buffer(struct ceph_mds_request *req,
|
|
struct inode *dir);
|
|
extern struct ceph_mds_request *
|
|
ceph_mdsc_create_request(struct ceph_mds_client *mdsc, int op, int mode);
|
|
extern int ceph_mdsc_submit_request(struct ceph_mds_client *mdsc,
|
|
struct inode *dir,
|
|
struct ceph_mds_request *req);
|
|
int ceph_mdsc_wait_request(struct ceph_mds_client *mdsc,
|
|
struct ceph_mds_request *req,
|
|
ceph_mds_request_wait_callback_t wait_func);
|
|
extern int ceph_mdsc_do_request(struct ceph_mds_client *mdsc,
|
|
struct inode *dir,
|
|
struct ceph_mds_request *req);
|
|
extern void ceph_mdsc_release_dir_caps(struct ceph_mds_request *req);
|
|
extern void ceph_mdsc_release_dir_caps_no_check(struct ceph_mds_request *req);
|
|
static inline void ceph_mdsc_get_request(struct ceph_mds_request *req)
|
|
{
|
|
kref_get(&req->r_kref);
|
|
}
|
|
extern void ceph_mdsc_release_request(struct kref *kref);
|
|
static inline void ceph_mdsc_put_request(struct ceph_mds_request *req)
|
|
{
|
|
kref_put(&req->r_kref, ceph_mdsc_release_request);
|
|
}
|
|
|
|
extern void send_flush_mdlog(struct ceph_mds_session *s);
|
|
extern void ceph_mdsc_iterate_sessions(struct ceph_mds_client *mdsc,
|
|
void (*cb)(struct ceph_mds_session *),
|
|
bool check_state);
|
|
extern struct ceph_msg *ceph_create_session_msg(u32 op, u64 seq);
|
|
extern void __ceph_queue_cap_release(struct ceph_mds_session *session,
|
|
struct ceph_cap *cap);
|
|
extern void ceph_flush_cap_releases(struct ceph_mds_client *mdsc,
|
|
struct ceph_mds_session *session);
|
|
extern void ceph_queue_cap_reclaim_work(struct ceph_mds_client *mdsc);
|
|
extern void ceph_reclaim_caps_nr(struct ceph_mds_client *mdsc, int nr);
|
|
extern int ceph_iterate_session_caps(struct ceph_mds_session *session,
|
|
int (*cb)(struct inode *,
|
|
struct ceph_cap *, void *),
|
|
void *arg);
|
|
extern void ceph_mdsc_pre_umount(struct ceph_mds_client *mdsc);
|
|
|
|
static inline void ceph_mdsc_free_path(char *path, int len)
|
|
{
|
|
if (!IS_ERR_OR_NULL(path))
|
|
__putname(path - (PATH_MAX - 1 - len));
|
|
}
|
|
|
|
extern char *ceph_mdsc_build_path(struct dentry *dentry, int *plen, u64 *base,
|
|
int stop_on_nosnap);
|
|
|
|
extern void __ceph_mdsc_drop_dentry_lease(struct dentry *dentry);
|
|
extern void ceph_mdsc_lease_send_msg(struct ceph_mds_session *session,
|
|
struct dentry *dentry, char action,
|
|
u32 seq);
|
|
|
|
extern void ceph_mdsc_handle_mdsmap(struct ceph_mds_client *mdsc,
|
|
struct ceph_msg *msg);
|
|
extern void ceph_mdsc_handle_fsmap(struct ceph_mds_client *mdsc,
|
|
struct ceph_msg *msg);
|
|
|
|
extern struct ceph_mds_session *
|
|
ceph_mdsc_open_export_target_session(struct ceph_mds_client *mdsc, int target);
|
|
extern void ceph_mdsc_open_export_target_sessions(struct ceph_mds_client *mdsc,
|
|
struct ceph_mds_session *session);
|
|
|
|
extern int ceph_trim_caps(struct ceph_mds_client *mdsc,
|
|
struct ceph_mds_session *session,
|
|
int max_caps);
|
|
|
|
static inline int ceph_wait_on_async_create(struct inode *inode)
|
|
{
|
|
struct ceph_inode_info *ci = ceph_inode(inode);
|
|
|
|
return wait_on_bit(&ci->i_ceph_flags, CEPH_ASYNC_CREATE_BIT,
|
|
TASK_KILLABLE);
|
|
}
|
|
|
|
extern int ceph_wait_on_conflict_unlink(struct dentry *dentry);
|
|
extern u64 ceph_get_deleg_ino(struct ceph_mds_session *session);
|
|
extern int ceph_restore_deleg_ino(struct ceph_mds_session *session, u64 ino);
|
|
#endif
|