| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Sage Weil | 1089 | 55.17% | 22 | 16.06% |
| Jeff Layton | 286 | 14.49% | 31 | 22.63% |
| Yan Zheng | 270 | 13.68% | 39 | 28.47% |
| Xiubo Li | 138 | 6.99% | 22 | 16.06% |
| Yehuda Sadeh Weinraub | 44 | 2.23% | 2 | 1.46% |
| Luis Henriques | 37 | 1.87% | 3 | 2.19% |
| Herb Shiu | 18 | 0.91% | 1 | 0.73% |
| John Spray | 17 | 0.86% | 2 | 1.46% |
| Milind Changire | 16 | 0.81% | 1 | 0.73% |
| Christian Brauner | 11 | 0.56% | 2 | 1.46% |
| Sam Lang | 11 | 0.56% | 1 | 0.73% |
| Zhi Zhang | 9 | 0.46% | 1 | 0.73% |
| Greg Farnum | 4 | 0.20% | 1 | 0.73% |
| David Disseldorp | 4 | 0.20% | 1 | 0.73% |
| Alex Elder | 4 | 0.20% | 1 | 0.73% |
| Alexander Mikhalitsyn | 4 | 0.20% | 1 | 0.73% |
| Elena Reshetova | 3 | 0.15% | 1 | 0.73% |
| Christophe Jaillet | 3 | 0.15% | 1 | 0.73% |
| Yanhu Cao | 3 | 0.15% | 1 | 0.73% |
| Ilya Dryomov | 1 | 0.05% | 1 | 0.73% |
| Arnd Bergmann | 1 | 0.05% | 1 | 0.73% |
| Greg Kroah-Hartman | 1 | 0.05% | 1 | 0.73% |
| Total | 1974 | 137 |
/* 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/auth.h> #include "mdsmap.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_32BITS_RETRY_FWD, CEPHFS_FEATURE_NEW_SNAPREALM_INFO, CEPHFS_FEATURE_HAS_OWNER_UIDGID, CEPHFS_FEATURE_MAX = CEPHFS_FEATURE_HAS_OWNER_UIDGID, }; #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_ALTERNATE_NAME, \ CEPHFS_FEATURE_NOTIFY_SESSION_STATE, \ CEPHFS_FEATURE_OP_GETVXATTR, \ CEPHFS_FEATURE_32BITS_RETRY_FWD, \ CEPHFS_FEATURE_HAS_OWNER_UIDGID, \ } /* * 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; u8 *fscrypt_auth; u8 *fscrypt_file; u32 fscrypt_auth_len; u32 fscrypt_file_len; u64 rsnaps; u64 change_attr; }; struct ceph_mds_reply_dir_entry { bool is_nokey; char *name; u32 name_len; u32 raw_hash; 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; u8 *altname; u32 dname_len; u32 altname_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 */ struct inode *r_new_inode; /* new inode (for creates) */ #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 */ #define CEPH_MDS_R_FSCRYPT_FILE (9) /* must marshal fscrypt_file field */ unsigned long r_req_flags; struct mutex r_fill_mutex; union ceph_mds_request_args r_args; struct ceph_fscrypt_auth *r_fscrypt_auth; u64 r_fscrypt_file; u8 *r_altname; /* fscrypt binary crypttext for long filenames */ u32 r_altname_len; /* length of r_altname */ int r_fmode; /* file mode, if expecting cap */ int r_request_release_offset; const struct cred *r_cred; struct mnt_idmap *r_mnt_idmap; 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; dev_t dev; u64 snap; 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; }; enum { CEPH_MDSC_STOPPING_BEGIN = 1, CEPH_MDSC_STOPPING_FLUSHING = 2, CEPH_MDSC_STOPPING_FLUSHED = 3, }; /* * 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 */ spinlock_t stopping_lock; /* protect snap_empty */ int stopping; /* the stage of shutting down */ atomic_t stopping_blockers; struct completion stopping_waiter; 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 *, int mds, 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 ceph_mds_client *mdsc, struct dentry *dentry, int *plen, u64 *base, int for_wire); 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); extern bool enable_unsafe_idmap; #endif
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